source "drivers/usb/gadget/Kconfig"
-source "drivers/usb/otg/Kconfig"
-
endif # USB_SUPPORT
obj-$(CONFIG_USB) += core/
-obj-$(CONFIG_USB_OTG_UTILS) += otg/
-
obj-$(CONFIG_USB_DWC3) += dwc3/
obj-$(CONFIG_USB_MON) += mon/
+++ /dev/null
-#
-# USB OTG infrastructure may be needed for peripheral-only, host-only,
-# or OTG-capable configurations when OTG transceivers or controllers
-# are used.
-#
-
-comment "OTG and related infrastructure"
-
-config USB_OTG_UTILS
- bool
- help
- Select this to make sure the build includes objects from
- the OTG infrastructure directory.
-
-if USB || USB_GADGET
-
-#
-# USB Transceiver Drivers
-#
-config USB_GPIO_VBUS
- tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
- depends on GENERIC_GPIO
- select USB_OTG_UTILS
- help
- Provides simple GPIO VBUS sensing for controllers with an
- internal transceiver via the usb_phy interface, and
- optionally control of a D+ pullup GPIO as well as a VBUS
- current limit regulator.
-
-config ISP1301_OMAP
- tristate "Philips ISP1301 with OMAP OTG"
- depends on I2C && ARCH_OMAP_OTG
- select USB_OTG_UTILS
- help
- If you say yes here you get support for the Philips ISP1301
- USB-On-The-Go transceiver working with the OMAP OTG controller.
- The ISP1301 is a full speed USB transceiver which is used in
- products including H2, H3, and H4 development boards for Texas
- Instruments OMAP processors.
-
- This driver can also be built as a module. If so, the module
- will be called isp1301_omap.
-
-config USB_ULPI
- bool "Generic ULPI Transceiver Driver"
- depends on ARM
- select USB_OTG_UTILS
- help
- Enable this to support ULPI connected USB OTG transceivers which
- are likely found on embedded boards.
-
-config USB_ULPI_VIEWPORT
- bool
- depends on USB_ULPI
- help
- Provides read/write operations to the ULPI phy register set for
- controllers with a viewport register (e.g. Chipidea/ARC controllers).
-
-config TWL4030_USB
- tristate "TWL4030 USB Transceiver Driver"
- depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS
- select USB_OTG_UTILS
- help
- Enable this to support the USB OTG transceiver on TWL4030
- family chips (including the TWL5030 and TPS659x0 devices).
- This transceiver supports high and full speed devices plus,
- in host mode, low speed.
-
-config TWL6030_USB
- tristate "TWL6030 USB Transceiver Driver"
- depends on TWL4030_CORE && OMAP_USB2 && USB_MUSB_OMAP2PLUS
- select USB_OTG_UTILS
- help
- Enable this to support the USB OTG transceiver on TWL6030
- family chips. This TWL6030 transceiver has the VBUS and ID GND
- and OTG SRP events capabilities. For all other transceiver functionality
- UTMI PHY is embedded in OMAP4430. The internal PHY configurations APIs
- are hooked to this driver through platform_data structure.
- The definition of internal PHY APIs are in the mach-omap2 layer.
-
-config NOP_USB_XCEIV
- tristate "NOP USB Transceiver Driver"
- select USB_OTG_UTILS
- help
- This driver is to be used by all the usb transceiver which are either
- built-in with usb ip or which are autonomous and doesn't require any
- phy programming such as ISP1x04 etc.
-
-config USB_MSM_OTG
- tristate "OTG support for Qualcomm on-chip USB controller"
- depends on (USB || USB_GADGET) && ARCH_MSM
- select USB_OTG_UTILS
- help
- Enable this to support the USB OTG transceiver on MSM chips. It
- handles PHY initialization, clock management, and workarounds
- required after resetting the hardware and power management.
- This driver is required even for peripheral only or host only
- mode configurations.
- This driver is not supported on boards like trout which
- has an external PHY.
-
-config AB8500_USB
- tristate "AB8500 USB Transceiver Driver"
- depends on AB8500_CORE
- select USB_OTG_UTILS
- help
- Enable this to support the USB OTG transceiver in AB8500 chip.
- This transceiver supports high and full speed devices plus,
- in host mode, low speed.
-
-config FSL_USB2_OTG
- bool "Freescale USB OTG Transceiver Driver"
- depends on USB_EHCI_FSL && USB_FSL_USB2 && USB_SUSPEND
- select USB_OTG
- select USB_OTG_UTILS
- help
- Enable this to support Freescale USB OTG transceiver.
-
-config USB_MXS_PHY
- tristate "Freescale MXS USB PHY support"
- depends on ARCH_MXC || ARCH_MXS
- select STMP_DEVICE
- select USB_OTG_UTILS
- help
- Enable this to support the Freescale MXS USB PHY.
-
- MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x.
-
-config USB_MV_OTG
- tristate "Marvell USB OTG support"
- depends on USB_EHCI_MV && USB_MV_UDC && USB_SUSPEND
- select USB_OTG
- select USB_OTG_UTILS
- help
- Say Y here if you want to build Marvell USB OTG transciever
- driver in kernel (including PXA and MMP series). This driver
- implements role switch between EHCI host driver and gadget driver.
-
- To compile this driver as a module, choose M here.
-
-endif # USB || OTG
+++ /dev/null
-#
-# OTG infrastructure and transceiver drivers
-#
-
-ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG
-ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG
-
-# transceiver drivers
-obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
-obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
-obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
-obj-$(CONFIG_TWL6030_USB) += twl6030-usb.o
-obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o
-obj-$(CONFIG_USB_ULPI) += ulpi.o
-obj-$(CONFIG_USB_ULPI_VIEWPORT) += ulpi_viewport.o
-obj-$(CONFIG_USB_MSM_OTG) += msm_otg.o
-obj-$(CONFIG_AB8500_USB) += ab8500-usb.o
-fsl_usb2_otg-objs := fsl_otg.o otg_fsm.o
-obj-$(CONFIG_FSL_USB2_OTG) += fsl_usb2_otg.o
-obj-$(CONFIG_USB_MXS_PHY) += mxs-phy.o
-obj-$(CONFIG_USB_MV_OTG) += mv_otg.o
+++ /dev/null
-/*
- * drivers/usb/otg/ab8500_usb.c
- *
- * USB transceiver driver for AB8500 chip
- *
- * Copyright (C) 2010 ST-Ericsson AB
- * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/usb/otg.h>
-#include <linux/slab.h>
-#include <linux/notifier.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/mfd/abx500.h>
-#include <linux/mfd/abx500/ab8500.h>
-
-#define AB8500_MAIN_WD_CTRL_REG 0x01
-#define AB8500_USB_LINE_STAT_REG 0x80
-#define AB8500_USB_PHY_CTRL_REG 0x8A
-
-#define AB8500_BIT_OTG_STAT_ID (1 << 0)
-#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
-#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
-#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)
-#define AB8500_BIT_WD_CTRL_KICK (1 << 1)
-
-#define AB8500_V1x_LINK_STAT_WAIT (HZ/10)
-#define AB8500_WD_KICK_DELAY_US 100 /* usec */
-#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */
-#define AB8500_WD_V10_DISABLE_DELAY_MS 100 /* ms */
-
-/* Usb line status register */
-enum ab8500_usb_link_status {
- USB_LINK_NOT_CONFIGURED = 0,
- USB_LINK_STD_HOST_NC,
- USB_LINK_STD_HOST_C_NS,
- USB_LINK_STD_HOST_C_S,
- USB_LINK_HOST_CHG_NM,
- USB_LINK_HOST_CHG_HS,
- USB_LINK_HOST_CHG_HS_CHIRP,
- USB_LINK_DEDICATED_CHG,
- USB_LINK_ACA_RID_A,
- USB_LINK_ACA_RID_B,
- USB_LINK_ACA_RID_C_NM,
- USB_LINK_ACA_RID_C_HS,
- USB_LINK_ACA_RID_C_HS_CHIRP,
- USB_LINK_HM_IDGND,
- USB_LINK_RESERVED,
- USB_LINK_NOT_VALID_LINK
-};
-
-struct ab8500_usb {
- struct usb_phy phy;
- struct device *dev;
- int irq_num_id_rise;
- int irq_num_id_fall;
- int irq_num_vbus_rise;
- int irq_num_vbus_fall;
- int irq_num_link_status;
- unsigned vbus_draw;
- struct delayed_work dwork;
- struct work_struct phy_dis_work;
- unsigned long link_status_wait;
- int rev;
-};
-
-static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
-{
- return container_of(x, struct ab8500_usb, phy);
-}
-
-static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
-{
- abx500_set_register_interruptible(ab->dev,
- AB8500_SYS_CTRL2_BLOCK,
- AB8500_MAIN_WD_CTRL_REG,
- AB8500_BIT_WD_CTRL_ENABLE);
-
- udelay(AB8500_WD_KICK_DELAY_US);
-
- abx500_set_register_interruptible(ab->dev,
- AB8500_SYS_CTRL2_BLOCK,
- AB8500_MAIN_WD_CTRL_REG,
- (AB8500_BIT_WD_CTRL_ENABLE
- | AB8500_BIT_WD_CTRL_KICK));
-
- if (ab->rev > 0x10) /* v1.1 v2.0 */
- udelay(AB8500_WD_V11_DISABLE_DELAY_US);
- else /* v1.0 */
- msleep(AB8500_WD_V10_DISABLE_DELAY_MS);
-
- abx500_set_register_interruptible(ab->dev,
- AB8500_SYS_CTRL2_BLOCK,
- AB8500_MAIN_WD_CTRL_REG,
- 0);
-}
-
-static void ab8500_usb_phy_ctrl(struct ab8500_usb *ab, bool sel_host,
- bool enable)
-{
- u8 ctrl_reg;
- abx500_get_register_interruptible(ab->dev,
- AB8500_USB,
- AB8500_USB_PHY_CTRL_REG,
- &ctrl_reg);
- if (sel_host) {
- if (enable)
- ctrl_reg |= AB8500_BIT_PHY_CTRL_HOST_EN;
- else
- ctrl_reg &= ~AB8500_BIT_PHY_CTRL_HOST_EN;
- } else {
- if (enable)
- ctrl_reg |= AB8500_BIT_PHY_CTRL_DEVICE_EN;
- else
- ctrl_reg &= ~AB8500_BIT_PHY_CTRL_DEVICE_EN;
- }
-
- abx500_set_register_interruptible(ab->dev,
- AB8500_USB,
- AB8500_USB_PHY_CTRL_REG,
- ctrl_reg);
-
- /* Needed to enable the phy.*/
- if (enable)
- ab8500_usb_wd_workaround(ab);
-}
-
-#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_ctrl(ab, true, true)
-#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_ctrl(ab, true, false)
-#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_ctrl(ab, false, true)
-#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_ctrl(ab, false, false)
-
-static int ab8500_usb_link_status_update(struct ab8500_usb *ab)
-{
- u8 reg;
- enum ab8500_usb_link_status lsts;
- void *v = NULL;
- enum usb_phy_events event;
-
- abx500_get_register_interruptible(ab->dev,
- AB8500_USB,
- AB8500_USB_LINE_STAT_REG,
- ®);
-
- lsts = (reg >> 3) & 0x0F;
-
- switch (lsts) {
- case USB_LINK_NOT_CONFIGURED:
- case USB_LINK_RESERVED:
- case USB_LINK_NOT_VALID_LINK:
- /* TODO: Disable regulators. */
- ab8500_usb_host_phy_dis(ab);
- ab8500_usb_peri_phy_dis(ab);
- ab->phy.state = OTG_STATE_B_IDLE;
- ab->phy.otg->default_a = false;
- ab->vbus_draw = 0;
- event = USB_EVENT_NONE;
- break;
-
- case USB_LINK_STD_HOST_NC:
- case USB_LINK_STD_HOST_C_NS:
- case USB_LINK_STD_HOST_C_S:
- case USB_LINK_HOST_CHG_NM:
- case USB_LINK_HOST_CHG_HS:
- case USB_LINK_HOST_CHG_HS_CHIRP:
- if (ab->phy.otg->gadget) {
- /* TODO: Enable regulators. */
- ab8500_usb_peri_phy_en(ab);
- v = ab->phy.otg->gadget;
- }
- event = USB_EVENT_VBUS;
- break;
-
- case USB_LINK_HM_IDGND:
- if (ab->phy.otg->host) {
- /* TODO: Enable regulators. */
- ab8500_usb_host_phy_en(ab);
- v = ab->phy.otg->host;
- }
- ab->phy.state = OTG_STATE_A_IDLE;
- ab->phy.otg->default_a = true;
- event = USB_EVENT_ID;
- break;
-
- case USB_LINK_ACA_RID_A:
- case USB_LINK_ACA_RID_B:
- /* TODO */
- case USB_LINK_ACA_RID_C_NM:
- case USB_LINK_ACA_RID_C_HS:
- case USB_LINK_ACA_RID_C_HS_CHIRP:
- case USB_LINK_DEDICATED_CHG:
- /* TODO: vbus_draw */
- event = USB_EVENT_CHARGER;
- break;
- }
-
- atomic_notifier_call_chain(&ab->phy.notifier, event, v);
-
- return 0;
-}
-
-static void ab8500_usb_delayed_work(struct work_struct *work)
-{
- struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
- dwork.work);
-
- ab8500_usb_link_status_update(ab);
-}
-
-static irqreturn_t ab8500_usb_v1x_common_irq(int irq, void *data)
-{
- struct ab8500_usb *ab = (struct ab8500_usb *) data;
-
- /* Wait for link status to become stable. */
- schedule_delayed_work(&ab->dwork, ab->link_status_wait);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ab8500_usb_v1x_vbus_fall_irq(int irq, void *data)
-{
- struct ab8500_usb *ab = (struct ab8500_usb *) data;
-
- /* Link status will not be updated till phy is disabled. */
- ab8500_usb_peri_phy_dis(ab);
-
- /* Wait for link status to become stable. */
- schedule_delayed_work(&ab->dwork, ab->link_status_wait);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ab8500_usb_v20_irq(int irq, void *data)
-{
- struct ab8500_usb *ab = (struct ab8500_usb *) data;
-
- ab8500_usb_link_status_update(ab);
-
- return IRQ_HANDLED;
-}
-
-static void ab8500_usb_phy_disable_work(struct work_struct *work)
-{
- struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
- phy_dis_work);
-
- if (!ab->phy.otg->host)
- ab8500_usb_host_phy_dis(ab);
-
- if (!ab->phy.otg->gadget)
- ab8500_usb_peri_phy_dis(ab);
-}
-
-static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
-{
- struct ab8500_usb *ab;
-
- if (!phy)
- return -ENODEV;
-
- ab = phy_to_ab(phy);
-
- ab->vbus_draw = mA;
-
- if (mA)
- atomic_notifier_call_chain(&ab->phy.notifier,
- USB_EVENT_ENUMERATED, ab->phy.otg->gadget);
- return 0;
-}
-
-/* TODO: Implement some way for charging or other drivers to read
- * ab->vbus_draw.
- */
-
-static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
-{
- /* TODO */
- return 0;
-}
-
-static int ab8500_usb_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- struct ab8500_usb *ab;
-
- if (!otg)
- return -ENODEV;
-
- ab = phy_to_ab(otg->phy);
-
- /* Some drivers call this function in atomic context.
- * Do not update ab8500 registers directly till this
- * is fixed.
- */
-
- if (!gadget) {
- /* TODO: Disable regulators. */
- otg->gadget = NULL;
- schedule_work(&ab->phy_dis_work);
- } else {
- otg->gadget = gadget;
- otg->phy->state = OTG_STATE_B_IDLE;
-
- /* Phy will not be enabled if cable is already
- * plugged-in. Schedule to enable phy.
- * Use same delay to avoid any race condition.
- */
- schedule_delayed_work(&ab->dwork, ab->link_status_wait);
- }
-
- return 0;
-}
-
-static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct ab8500_usb *ab;
-
- if (!otg)
- return -ENODEV;
-
- ab = phy_to_ab(otg->phy);
-
- /* Some drivers call this function in atomic context.
- * Do not update ab8500 registers directly till this
- * is fixed.
- */
-
- if (!host) {
- /* TODO: Disable regulators. */
- otg->host = NULL;
- schedule_work(&ab->phy_dis_work);
- } else {
- otg->host = host;
- /* Phy will not be enabled if cable is already
- * plugged-in. Schedule to enable phy.
- * Use same delay to avoid any race condition.
- */
- schedule_delayed_work(&ab->dwork, ab->link_status_wait);
- }
-
- return 0;
-}
-
-static void ab8500_usb_irq_free(struct ab8500_usb *ab)
-{
- if (ab->rev < 0x20) {
- free_irq(ab->irq_num_id_rise, ab);
- free_irq(ab->irq_num_id_fall, ab);
- free_irq(ab->irq_num_vbus_rise, ab);
- free_irq(ab->irq_num_vbus_fall, ab);
- } else {
- free_irq(ab->irq_num_link_status, ab);
- }
-}
-
-static int ab8500_usb_v1x_res_setup(struct platform_device *pdev,
- struct ab8500_usb *ab)
-{
- int err;
-
- ab->irq_num_id_rise = platform_get_irq_byname(pdev, "ID_WAKEUP_R");
- if (ab->irq_num_id_rise < 0) {
- dev_err(&pdev->dev, "ID rise irq not found\n");
- return ab->irq_num_id_rise;
- }
- err = request_threaded_irq(ab->irq_num_id_rise, NULL,
- ab8500_usb_v1x_common_irq,
- IRQF_NO_SUSPEND | IRQF_SHARED,
- "usb-id-rise", ab);
- if (err < 0) {
- dev_err(ab->dev, "request_irq failed for ID rise irq\n");
- goto fail0;
- }
-
- ab->irq_num_id_fall = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
- if (ab->irq_num_id_fall < 0) {
- dev_err(&pdev->dev, "ID fall irq not found\n");
- return ab->irq_num_id_fall;
- }
- err = request_threaded_irq(ab->irq_num_id_fall, NULL,
- ab8500_usb_v1x_common_irq,
- IRQF_NO_SUSPEND | IRQF_SHARED,
- "usb-id-fall", ab);
- if (err < 0) {
- dev_err(ab->dev, "request_irq failed for ID fall irq\n");
- goto fail1;
- }
-
- ab->irq_num_vbus_rise = platform_get_irq_byname(pdev, "VBUS_DET_R");
- if (ab->irq_num_vbus_rise < 0) {
- dev_err(&pdev->dev, "VBUS rise irq not found\n");
- return ab->irq_num_vbus_rise;
- }
- err = request_threaded_irq(ab->irq_num_vbus_rise, NULL,
- ab8500_usb_v1x_common_irq,
- IRQF_NO_SUSPEND | IRQF_SHARED,
- "usb-vbus-rise", ab);
- if (err < 0) {
- dev_err(ab->dev, "request_irq failed for Vbus rise irq\n");
- goto fail2;
- }
-
- ab->irq_num_vbus_fall = platform_get_irq_byname(pdev, "VBUS_DET_F");
- if (ab->irq_num_vbus_fall < 0) {
- dev_err(&pdev->dev, "VBUS fall irq not found\n");
- return ab->irq_num_vbus_fall;
- }
- err = request_threaded_irq(ab->irq_num_vbus_fall, NULL,
- ab8500_usb_v1x_vbus_fall_irq,
- IRQF_NO_SUSPEND | IRQF_SHARED,
- "usb-vbus-fall", ab);
- if (err < 0) {
- dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
- goto fail3;
- }
-
- return 0;
-fail3:
- free_irq(ab->irq_num_vbus_rise, ab);
-fail2:
- free_irq(ab->irq_num_id_fall, ab);
-fail1:
- free_irq(ab->irq_num_id_rise, ab);
-fail0:
- return err;
-}
-
-static int ab8500_usb_v2_res_setup(struct platform_device *pdev,
- struct ab8500_usb *ab)
-{
- int err;
-
- ab->irq_num_link_status = platform_get_irq_byname(pdev,
- "USB_LINK_STATUS");
- if (ab->irq_num_link_status < 0) {
- dev_err(&pdev->dev, "Link status irq not found\n");
- return ab->irq_num_link_status;
- }
-
- err = request_threaded_irq(ab->irq_num_link_status, NULL,
- ab8500_usb_v20_irq,
- IRQF_NO_SUSPEND | IRQF_SHARED,
- "usb-link-status", ab);
- if (err < 0) {
- dev_err(ab->dev,
- "request_irq failed for link status irq\n");
- return err;
- }
-
- return 0;
-}
-
-static int ab8500_usb_probe(struct platform_device *pdev)
-{
- struct ab8500_usb *ab;
- struct usb_otg *otg;
- int err;
- int rev;
-
- rev = abx500_get_chip_id(&pdev->dev);
- if (rev < 0) {
- dev_err(&pdev->dev, "Chip id read failed\n");
- return rev;
- } else if (rev < 0x10) {
- dev_err(&pdev->dev, "Unsupported AB8500 chip\n");
- return -ENODEV;
- }
-
- ab = kzalloc(sizeof *ab, GFP_KERNEL);
- if (!ab)
- return -ENOMEM;
-
- otg = kzalloc(sizeof *otg, GFP_KERNEL);
- if (!otg) {
- kfree(ab);
- return -ENOMEM;
- }
-
- ab->dev = &pdev->dev;
- ab->rev = rev;
- ab->phy.dev = ab->dev;
- ab->phy.otg = otg;
- ab->phy.label = "ab8500";
- ab->phy.set_suspend = ab8500_usb_set_suspend;
- ab->phy.set_power = ab8500_usb_set_power;
- ab->phy.state = OTG_STATE_UNDEFINED;
-
- otg->phy = &ab->phy;
- otg->set_host = ab8500_usb_set_host;
- otg->set_peripheral = ab8500_usb_set_peripheral;
-
- platform_set_drvdata(pdev, ab);
-
- ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier);
-
- /* v1: Wait for link status to become stable.
- * all: Updates form set_host and set_peripheral as they are atomic.
- */
- INIT_DELAYED_WORK(&ab->dwork, ab8500_usb_delayed_work);
-
- /* all: Disable phy when called from set_host and set_peripheral */
- INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);
-
- if (ab->rev < 0x20) {
- err = ab8500_usb_v1x_res_setup(pdev, ab);
- ab->link_status_wait = AB8500_V1x_LINK_STAT_WAIT;
- } else {
- err = ab8500_usb_v2_res_setup(pdev, ab);
- }
-
- if (err < 0)
- goto fail0;
-
- err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
- if (err) {
- dev_err(&pdev->dev, "Can't register transceiver\n");
- goto fail1;
- }
-
- dev_info(&pdev->dev, "AB8500 usb driver initialized\n");
-
- return 0;
-fail1:
- ab8500_usb_irq_free(ab);
-fail0:
- kfree(otg);
- kfree(ab);
- return err;
-}
-
-static int ab8500_usb_remove(struct platform_device *pdev)
-{
- struct ab8500_usb *ab = platform_get_drvdata(pdev);
-
- ab8500_usb_irq_free(ab);
-
- cancel_delayed_work_sync(&ab->dwork);
-
- cancel_work_sync(&ab->phy_dis_work);
-
- usb_remove_phy(&ab->phy);
-
- ab8500_usb_host_phy_dis(ab);
- ab8500_usb_peri_phy_dis(ab);
-
- platform_set_drvdata(pdev, NULL);
-
- kfree(ab->phy.otg);
- kfree(ab);
-
- return 0;
-}
-
-static struct platform_driver ab8500_usb_driver = {
- .probe = ab8500_usb_probe,
- .remove = ab8500_usb_remove,
- .driver = {
- .name = "ab8500-usb",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init ab8500_usb_init(void)
-{
- return platform_driver_register(&ab8500_usb_driver);
-}
-subsys_initcall(ab8500_usb_init);
-
-static void __exit ab8500_usb_exit(void)
-{
- platform_driver_unregister(&ab8500_usb_driver);
-}
-module_exit(ab8500_usb_exit);
-
-MODULE_ALIAS("platform:ab8500_usb");
-MODULE_AUTHOR("ST-Ericsson AB");
-MODULE_DESCRIPTION("AB8500 usb transceiver driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2007,2008 Freescale semiconductor, Inc.
- *
- * Author: Li Yang <LeoLi@freescale.com>
- * Jerry Huang <Chang-Ming.Huang@freescale.com>
- *
- * Initialization based on code from Shlomi Gridish.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/proc_fs.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/timer.h>
-#include <linux/usb.h>
-#include <linux/device.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/workqueue.h>
-#include <linux/time.h>
-#include <linux/fsl_devices.h>
-#include <linux/platform_device.h>
-#include <linux/uaccess.h>
-
-#include <asm/unaligned.h>
-
-#include "fsl_otg.h"
-
-#define DRIVER_VERSION "Rev. 1.55"
-#define DRIVER_AUTHOR "Jerry Huang/Li Yang"
-#define DRIVER_DESC "Freescale USB OTG Transceiver Driver"
-#define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION
-
-static const char driver_name[] = "fsl-usb2-otg";
-
-const pm_message_t otg_suspend_state = {
- .event = 1,
-};
-
-#define HA_DATA_PULSE
-
-static struct usb_dr_mmap *usb_dr_regs;
-static struct fsl_otg *fsl_otg_dev;
-static int srp_wait_done;
-
-/* FSM timers */
-struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr,
- *b_ase0_brst_tmr, *b_se0_srp_tmr;
-
-/* Driver specific timers */
-struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr,
- *b_srp_wait_tmr, *a_wait_enum_tmr;
-
-static struct list_head active_timers;
-
-static struct fsl_otg_config fsl_otg_initdata = {
- .otg_port = 1,
-};
-
-#ifdef CONFIG_PPC32
-static u32 _fsl_readl_be(const unsigned __iomem *p)
-{
- return in_be32(p);
-}
-
-static u32 _fsl_readl_le(const unsigned __iomem *p)
-{
- return in_le32(p);
-}
-
-static void _fsl_writel_be(u32 v, unsigned __iomem *p)
-{
- out_be32(p, v);
-}
-
-static void _fsl_writel_le(u32 v, unsigned __iomem *p)
-{
- out_le32(p, v);
-}
-
-static u32 (*_fsl_readl)(const unsigned __iomem *p);
-static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
-
-#define fsl_readl(p) (*_fsl_readl)((p))
-#define fsl_writel(v, p) (*_fsl_writel)((v), (p))
-
-#else
-#define fsl_readl(addr) readl(addr)
-#define fsl_writel(val, addr) writel(val, addr)
-#endif /* CONFIG_PPC32 */
-
-/* Routines to access transceiver ULPI registers */
-u8 view_ulpi(u8 addr)
-{
- u32 temp;
-
- temp = 0x40000000 | (addr << 16);
- fsl_writel(temp, &usb_dr_regs->ulpiview);
- udelay(1000);
- while (temp & 0x40)
- temp = fsl_readl(&usb_dr_regs->ulpiview);
- return (le32_to_cpu(temp) & 0x0000ff00) >> 8;
-}
-
-int write_ulpi(u8 addr, u8 data)
-{
- u32 temp;
-
- temp = 0x60000000 | (addr << 16) | data;
- fsl_writel(temp, &usb_dr_regs->ulpiview);
- return 0;
-}
-
-/* -------------------------------------------------------------*/
-/* Operations that will be called from OTG Finite State Machine */
-
-/* Charge vbus for vbus pulsing in SRP */
-void fsl_otg_chrg_vbus(int on)
-{
- u32 tmp;
-
- tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
-
- if (on)
- /* stop discharging, start charging */
- tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) |
- OTGSC_CTRL_VBUS_CHARGE;
- else
- /* stop charging */
- tmp &= ~OTGSC_CTRL_VBUS_CHARGE;
-
- fsl_writel(tmp, &usb_dr_regs->otgsc);
-}
-
-/* Discharge vbus through a resistor to ground */
-void fsl_otg_dischrg_vbus(int on)
-{
- u32 tmp;
-
- tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
-
- if (on)
- /* stop charging, start discharging */
- tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) |
- OTGSC_CTRL_VBUS_DISCHARGE;
- else
- /* stop discharging */
- tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE;
-
- fsl_writel(tmp, &usb_dr_regs->otgsc);
-}
-
-/* A-device driver vbus, controlled through PP bit in PORTSC */
-void fsl_otg_drv_vbus(int on)
-{
- u32 tmp;
-
- if (on) {
- tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS;
- fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc);
- } else {
- tmp = fsl_readl(&usb_dr_regs->portsc) &
- ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER;
- fsl_writel(tmp, &usb_dr_regs->portsc);
- }
-}
-
-/*
- * Pull-up D+, signalling connect by periperal. Also used in
- * data-line pulsing in SRP
- */
-void fsl_otg_loc_conn(int on)
-{
- u32 tmp;
-
- tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
-
- if (on)
- tmp |= OTGSC_CTRL_DATA_PULSING;
- else
- tmp &= ~OTGSC_CTRL_DATA_PULSING;
-
- fsl_writel(tmp, &usb_dr_regs->otgsc);
-}
-
-/*
- * Generate SOF by host. This is controlled through suspend/resume the
- * port. In host mode, controller will automatically send SOF.
- * Suspend will block the data on the port.
- */
-void fsl_otg_loc_sof(int on)
-{
- u32 tmp;
-
- tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS;
- if (on)
- tmp |= PORTSC_PORT_FORCE_RESUME;
- else
- tmp |= PORTSC_PORT_SUSPEND;
-
- fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc);
-
-}
-
-/* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */
-void fsl_otg_start_pulse(void)
-{
- u32 tmp;
-
- srp_wait_done = 0;
-#ifdef HA_DATA_PULSE
- tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
- tmp |= OTGSC_HA_DATA_PULSE;
- fsl_writel(tmp, &usb_dr_regs->otgsc);
-#else
- fsl_otg_loc_conn(1);
-#endif
-
- fsl_otg_add_timer(b_data_pulse_tmr);
-}
-
-void b_data_pulse_end(unsigned long foo)
-{
-#ifdef HA_DATA_PULSE
-#else
- fsl_otg_loc_conn(0);
-#endif
-
- /* Do VBUS pulse after data pulse */
- fsl_otg_pulse_vbus();
-}
-
-void fsl_otg_pulse_vbus(void)
-{
- srp_wait_done = 0;
- fsl_otg_chrg_vbus(1);
- /* start the timer to end vbus charge */
- fsl_otg_add_timer(b_vbus_pulse_tmr);
-}
-
-void b_vbus_pulse_end(unsigned long foo)
-{
- fsl_otg_chrg_vbus(0);
-
- /*
- * As USB3300 using the same a_sess_vld and b_sess_vld voltage
- * we need to discharge the bus for a while to distinguish
- * residual voltage of vbus pulsing and A device pull up
- */
- fsl_otg_dischrg_vbus(1);
- fsl_otg_add_timer(b_srp_wait_tmr);
-}
-
-void b_srp_end(unsigned long foo)
-{
- fsl_otg_dischrg_vbus(0);
- srp_wait_done = 1;
-
- if ((fsl_otg_dev->phy.state == OTG_STATE_B_SRP_INIT) &&
- fsl_otg_dev->fsm.b_sess_vld)
- fsl_otg_dev->fsm.b_srp_done = 1;
-}
-
-/*
- * Workaround for a_host suspending too fast. When a_bus_req=0,
- * a_host will start by SRP. It needs to set b_hnp_enable before
- * actually suspending to start HNP
- */
-void a_wait_enum(unsigned long foo)
-{
- VDBG("a_wait_enum timeout\n");
- if (!fsl_otg_dev->phy.otg->host->b_hnp_enable)
- fsl_otg_add_timer(a_wait_enum_tmr);
- else
- otg_statemachine(&fsl_otg_dev->fsm);
-}
-
-/* The timeout callback function to set time out bit */
-void set_tmout(unsigned long indicator)
-{
- *(int *)indicator = 1;
-}
-
-/* Initialize timers */
-int fsl_otg_init_timers(struct otg_fsm *fsm)
-{
- /* FSM used timers */
- a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
- (unsigned long)&fsm->a_wait_vrise_tmout);
- if (!a_wait_vrise_tmr)
- return -ENOMEM;
-
- a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON,
- (unsigned long)&fsm->a_wait_bcon_tmout);
- if (!a_wait_bcon_tmr)
- return -ENOMEM;
-
- a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
- (unsigned long)&fsm->a_aidl_bdis_tmout);
- if (!a_aidl_bdis_tmr)
- return -ENOMEM;
-
- b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST,
- (unsigned long)&fsm->b_ase0_brst_tmout);
- if (!b_ase0_brst_tmr)
- return -ENOMEM;
-
- b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
- (unsigned long)&fsm->b_se0_srp);
- if (!b_se0_srp_tmr)
- return -ENOMEM;
-
- b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL,
- (unsigned long)&fsm->b_srp_done);
- if (!b_srp_fail_tmr)
- return -ENOMEM;
-
- a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10,
- (unsigned long)&fsm);
- if (!a_wait_enum_tmr)
- return -ENOMEM;
-
- /* device driver used timers */
- b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0);
- if (!b_srp_wait_tmr)
- return -ENOMEM;
-
- b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end,
- TB_DATA_PLS, 0);
- if (!b_data_pulse_tmr)
- return -ENOMEM;
-
- b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end,
- TB_VBUS_PLS, 0);
- if (!b_vbus_pulse_tmr)
- return -ENOMEM;
-
- return 0;
-}
-
-/* Uninitialize timers */
-void fsl_otg_uninit_timers(void)
-{
- /* FSM used timers */
- kfree(a_wait_vrise_tmr);
- kfree(a_wait_bcon_tmr);
- kfree(a_aidl_bdis_tmr);
- kfree(b_ase0_brst_tmr);
- kfree(b_se0_srp_tmr);
- kfree(b_srp_fail_tmr);
- kfree(a_wait_enum_tmr);
-
- /* device driver used timers */
- kfree(b_srp_wait_tmr);
- kfree(b_data_pulse_tmr);
- kfree(b_vbus_pulse_tmr);
-}
-
-/* Add timer to timer list */
-void fsl_otg_add_timer(void *gtimer)
-{
- struct fsl_otg_timer *timer = gtimer;
- struct fsl_otg_timer *tmp_timer;
-
- /*
- * Check if the timer is already in the active list,
- * if so update timer count
- */
- list_for_each_entry(tmp_timer, &active_timers, list)
- if (tmp_timer == timer) {
- timer->count = timer->expires;
- return;
- }
- timer->count = timer->expires;
- list_add_tail(&timer->list, &active_timers);
-}
-
-/* Remove timer from the timer list; clear timeout status */
-void fsl_otg_del_timer(void *gtimer)
-{
- struct fsl_otg_timer *timer = gtimer;
- struct fsl_otg_timer *tmp_timer, *del_tmp;
-
- list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
- if (tmp_timer == timer)
- list_del(&timer->list);
-}
-
-/*
- * Reduce timer count by 1, and find timeout conditions.
- * Called by fsl_otg 1ms timer interrupt
- */
-int fsl_otg_tick_timer(void)
-{
- struct fsl_otg_timer *tmp_timer, *del_tmp;
- int expired = 0;
-
- list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
- tmp_timer->count--;
- /* check if timer expires */
- if (!tmp_timer->count) {
- list_del(&tmp_timer->list);
- tmp_timer->function(tmp_timer->data);
- expired = 1;
- }
- }
-
- return expired;
-}
-
-/* Reset controller, not reset the bus */
-void otg_reset_controller(void)
-{
- u32 command;
-
- command = fsl_readl(&usb_dr_regs->usbcmd);
- command |= (1 << 1);
- fsl_writel(command, &usb_dr_regs->usbcmd);
- while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1))
- ;
-}
-
-/* Call suspend/resume routines in host driver */
-int fsl_otg_start_host(struct otg_fsm *fsm, int on)
-{
- struct usb_otg *otg = fsm->otg;
- struct device *dev;
- struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
- u32 retval = 0;
-
- if (!otg->host)
- return -ENODEV;
- dev = otg->host->controller;
-
- /*
- * Update a_vbus_vld state as a_vbus_vld int is disabled
- * in device mode
- */
- fsm->a_vbus_vld =
- !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID);
- if (on) {
- /* start fsl usb host controller */
- if (otg_dev->host_working)
- goto end;
- else {
- otg_reset_controller();
- VDBG("host on......\n");
- if (dev->driver->pm && dev->driver->pm->resume) {
- retval = dev->driver->pm->resume(dev);
- if (fsm->id) {
- /* default-b */
- fsl_otg_drv_vbus(1);
- /*
- * Workaround: b_host can't driver
- * vbus, but PP in PORTSC needs to
- * be 1 for host to work.
- * So we set drv_vbus bit in
- * transceiver to 0 thru ULPI.
- */
- write_ulpi(0x0c, 0x20);
- }
- }
-
- otg_dev->host_working = 1;
- }
- } else {
- /* stop fsl usb host controller */
- if (!otg_dev->host_working)
- goto end;
- else {
- VDBG("host off......\n");
- if (dev && dev->driver) {
- if (dev->driver->pm && dev->driver->pm->suspend)
- retval = dev->driver->pm->suspend(dev);
- if (fsm->id)
- /* default-b */
- fsl_otg_drv_vbus(0);
- }
- otg_dev->host_working = 0;
- }
- }
-end:
- return retval;
-}
-
-/*
- * Call suspend and resume function in udc driver
- * to stop and start udc driver.
- */
-int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
-{
- struct usb_otg *otg = fsm->otg;
- struct device *dev;
-
- if (!otg->gadget || !otg->gadget->dev.parent)
- return -ENODEV;
-
- VDBG("gadget %s\n", on ? "on" : "off");
- dev = otg->gadget->dev.parent;
-
- if (on) {
- if (dev->driver->resume)
- dev->driver->resume(dev);
- } else {
- if (dev->driver->suspend)
- dev->driver->suspend(dev, otg_suspend_state);
- }
-
- return 0;
-}
-
-/*
- * Called by initialization code of host driver. Register host controller
- * to the OTG. Suspend host for OTG role detection.
- */
-static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct fsl_otg *otg_dev;
-
- if (!otg)
- return -ENODEV;
-
- otg_dev = container_of(otg->phy, struct fsl_otg, phy);
- if (otg_dev != fsl_otg_dev)
- return -ENODEV;
-
- otg->host = host;
-
- otg_dev->fsm.a_bus_drop = 0;
- otg_dev->fsm.a_bus_req = 1;
-
- if (host) {
- VDBG("host off......\n");
-
- otg->host->otg_port = fsl_otg_initdata.otg_port;
- otg->host->is_b_host = otg_dev->fsm.id;
- /*
- * must leave time for khubd to finish its thing
- * before yanking the host driver out from under it,
- * so suspend the host after a short delay.
- */
- otg_dev->host_working = 1;
- schedule_delayed_work(&otg_dev->otg_event, 100);
- return 0;
- } else {
- /* host driver going away */
- if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) &
- OTGSC_STS_USB_ID)) {
- /* Mini-A cable connected */
- struct otg_fsm *fsm = &otg_dev->fsm;
-
- otg->phy->state = OTG_STATE_UNDEFINED;
- fsm->protocol = PROTO_UNDEF;
- }
- }
-
- otg_dev->host_working = 0;
-
- otg_statemachine(&otg_dev->fsm);
-
- return 0;
-}
-
-/* Called by initialization code of udc. Register udc to OTG. */
-static int fsl_otg_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- struct fsl_otg *otg_dev;
-
- if (!otg)
- return -ENODEV;
-
- otg_dev = container_of(otg->phy, struct fsl_otg, phy);
- VDBG("otg_dev 0x%x\n", (int)otg_dev);
- VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
- if (otg_dev != fsl_otg_dev)
- return -ENODEV;
-
- if (!gadget) {
- if (!otg->default_a)
- otg->gadget->ops->vbus_draw(otg->gadget, 0);
- usb_gadget_vbus_disconnect(otg->gadget);
- otg->gadget = 0;
- otg_dev->fsm.b_bus_req = 0;
- otg_statemachine(&otg_dev->fsm);
- return 0;
- }
-
- otg->gadget = gadget;
- otg->gadget->is_a_peripheral = !otg_dev->fsm.id;
-
- otg_dev->fsm.b_bus_req = 1;
-
- /* start the gadget right away if the ID pin says Mini-B */
- DBG("ID pin=%d\n", otg_dev->fsm.id);
- if (otg_dev->fsm.id == 1) {
- fsl_otg_start_host(&otg_dev->fsm, 0);
- otg_drv_vbus(&otg_dev->fsm, 0);
- fsl_otg_start_gadget(&otg_dev->fsm, 1);
- }
-
- return 0;
-}
-
-/* Set OTG port power, only for B-device */
-static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA)
-{
- if (!fsl_otg_dev)
- return -ENODEV;
- if (phy->state == OTG_STATE_B_PERIPHERAL)
- pr_info("FSL OTG: Draw %d mA\n", mA);
-
- return 0;
-}
-
-/*
- * Delayed pin detect interrupt processing.
- *
- * When the Mini-A cable is disconnected from the board,
- * the pin-detect interrupt happens before the disconnect
- * interrupts for the connected device(s). In order to
- * process the disconnect interrupt(s) prior to switching
- * roles, the pin-detect interrupts are delayed, and handled
- * by this routine.
- */
-static void fsl_otg_event(struct work_struct *work)
-{
- struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work);
- struct otg_fsm *fsm = &og->fsm;
-
- if (fsm->id) { /* switch to gadget */
- fsl_otg_start_host(fsm, 0);
- otg_drv_vbus(fsm, 0);
- fsl_otg_start_gadget(fsm, 1);
- }
-}
-
-/* B-device start SRP */
-static int fsl_otg_start_srp(struct usb_otg *otg)
-{
- struct fsl_otg *otg_dev;
-
- if (!otg || otg->phy->state != OTG_STATE_B_IDLE)
- return -ENODEV;
-
- otg_dev = container_of(otg->phy, struct fsl_otg, phy);
- if (otg_dev != fsl_otg_dev)
- return -ENODEV;
-
- otg_dev->fsm.b_bus_req = 1;
- otg_statemachine(&otg_dev->fsm);
-
- return 0;
-}
-
-/* A_host suspend will call this function to start hnp */
-static int fsl_otg_start_hnp(struct usb_otg *otg)
-{
- struct fsl_otg *otg_dev;
-
- if (!otg)
- return -ENODEV;
-
- otg_dev = container_of(otg->phy, struct fsl_otg, phy);
- if (otg_dev != fsl_otg_dev)
- return -ENODEV;
-
- DBG("start_hnp...n");
-
- /* clear a_bus_req to enter a_suspend state */
- otg_dev->fsm.a_bus_req = 0;
- otg_statemachine(&otg_dev->fsm);
-
- return 0;
-}
-
-/*
- * Interrupt handler. OTG/host/peripheral share the same int line.
- * OTG driver clears OTGSC interrupts and leaves USB interrupts
- * intact. It needs to have knowledge of some USB interrupts
- * such as port change.
- */
-irqreturn_t fsl_otg_isr(int irq, void *dev_id)
-{
- struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
- struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
- u32 otg_int_src, otg_sc;
-
- otg_sc = fsl_readl(&usb_dr_regs->otgsc);
- otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8);
-
- /* Only clear otg interrupts */
- fsl_writel(otg_sc, &usb_dr_regs->otgsc);
-
- /*FIXME: ID change not generate when init to 0 */
- fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
- otg->default_a = (fsm->id == 0);
-
- /* process OTG interrupts */
- if (otg_int_src) {
- if (otg_int_src & OTGSC_INTSTS_USB_ID) {
- fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
- otg->default_a = (fsm->id == 0);
- /* clear conn information */
- if (fsm->id)
- fsm->b_conn = 0;
- else
- fsm->a_conn = 0;
-
- if (otg->host)
- otg->host->is_b_host = fsm->id;
- if (otg->gadget)
- otg->gadget->is_a_peripheral = !fsm->id;
- VDBG("ID int (ID is %d)\n", fsm->id);
-
- if (fsm->id) { /* switch to gadget */
- schedule_delayed_work(
- &((struct fsl_otg *)dev_id)->otg_event,
- 100);
- } else { /* switch to host */
- cancel_delayed_work(&
- ((struct fsl_otg *)dev_id)->
- otg_event);
- fsl_otg_start_gadget(fsm, 0);
- otg_drv_vbus(fsm, 1);
- fsl_otg_start_host(fsm, 1);
- }
- return IRQ_HANDLED;
- }
- }
- return IRQ_NONE;
-}
-
-static struct otg_fsm_ops fsl_otg_ops = {
- .chrg_vbus = fsl_otg_chrg_vbus,
- .drv_vbus = fsl_otg_drv_vbus,
- .loc_conn = fsl_otg_loc_conn,
- .loc_sof = fsl_otg_loc_sof,
- .start_pulse = fsl_otg_start_pulse,
-
- .add_timer = fsl_otg_add_timer,
- .del_timer = fsl_otg_del_timer,
-
- .start_host = fsl_otg_start_host,
- .start_gadget = fsl_otg_start_gadget,
-};
-
-/* Initialize the global variable fsl_otg_dev and request IRQ for OTG */
-static int fsl_otg_conf(struct platform_device *pdev)
-{
- struct fsl_otg *fsl_otg_tc;
- int status;
-
- if (fsl_otg_dev)
- return 0;
-
- /* allocate space to fsl otg device */
- fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL);
- if (!fsl_otg_tc)
- return -ENOMEM;
-
- fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
- if (!fsl_otg_tc->phy.otg) {
- kfree(fsl_otg_tc);
- return -ENOMEM;
- }
-
- INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event);
-
- INIT_LIST_HEAD(&active_timers);
- status = fsl_otg_init_timers(&fsl_otg_tc->fsm);
- if (status) {
- pr_info("Couldn't init OTG timers\n");
- goto err;
- }
- spin_lock_init(&fsl_otg_tc->fsm.lock);
-
- /* Set OTG state machine operations */
- fsl_otg_tc->fsm.ops = &fsl_otg_ops;
-
- /* initialize the otg structure */
- fsl_otg_tc->phy.label = DRIVER_DESC;
- fsl_otg_tc->phy.set_power = fsl_otg_set_power;
-
- fsl_otg_tc->phy.otg->phy = &fsl_otg_tc->phy;
- fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host;
- fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral;
- fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp;
- fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp;
-
- fsl_otg_dev = fsl_otg_tc;
-
- /* Store the otg transceiver */
- status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
- if (status) {
- pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n");
- goto err;
- }
-
- return 0;
-err:
- fsl_otg_uninit_timers();
- kfree(fsl_otg_tc->phy.otg);
- kfree(fsl_otg_tc);
- return status;
-}
-
-/* OTG Initialization */
-int usb_otg_start(struct platform_device *pdev)
-{
- struct fsl_otg *p_otg;
- struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2);
- struct otg_fsm *fsm;
- int status;
- struct resource *res;
- u32 temp;
- struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
-
- p_otg = container_of(otg_trans, struct fsl_otg, phy);
- fsm = &p_otg->fsm;
-
- /* Initialize the state machine structure with default values */
- SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED);
- fsm->otg = p_otg->phy.otg;
-
- /* We don't require predefined MEM/IRQ resource index */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENXIO;
-
- /* We don't request_mem_region here to enable resource sharing
- * with host/device */
-
- usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap));
- p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs;
- pdata->regs = (void *)usb_dr_regs;
-
- if (pdata->init && pdata->init(pdev) != 0)
- return -EINVAL;
-
- if (pdata->big_endian_mmio) {
- _fsl_readl = _fsl_readl_be;
- _fsl_writel = _fsl_writel_be;
- } else {
- _fsl_readl = _fsl_readl_le;
- _fsl_writel = _fsl_writel_le;
- }
-
- /* request irq */
- p_otg->irq = platform_get_irq(pdev, 0);
- status = request_irq(p_otg->irq, fsl_otg_isr,
- IRQF_SHARED, driver_name, p_otg);
- if (status) {
- dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n",
- p_otg->irq, status);
- iounmap(p_otg->dr_mem_map);
- kfree(p_otg->phy.otg);
- kfree(p_otg);
- return status;
- }
-
- /* stop the controller */
- temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
- temp &= ~USB_CMD_RUN_STOP;
- fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
-
- /* reset the controller */
- temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
- temp |= USB_CMD_CTRL_RESET;
- fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
-
- /* wait reset completed */
- while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET)
- ;
-
- /* configure the VBUSHS as IDLE(both host and device) */
- temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0);
- fsl_writel(temp, &p_otg->dr_mem_map->usbmode);
-
- /* configure PHY interface */
- temp = fsl_readl(&p_otg->dr_mem_map->portsc);
- temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
- switch (pdata->phy_mode) {
- case FSL_USB2_PHY_ULPI:
- temp |= PORTSC_PTS_ULPI;
- break;
- case FSL_USB2_PHY_UTMI_WIDE:
- temp |= PORTSC_PTW_16BIT;
- /* fall through */
- case FSL_USB2_PHY_UTMI:
- temp |= PORTSC_PTS_UTMI;
- /* fall through */
- default:
- break;
- }
- fsl_writel(temp, &p_otg->dr_mem_map->portsc);
-
- if (pdata->have_sysif_regs) {
- /* configure control enable IO output, big endian register */
- temp = __raw_readl(&p_otg->dr_mem_map->control);
- temp |= USB_CTRL_IOENB;
- __raw_writel(temp, &p_otg->dr_mem_map->control);
- }
-
- /* disable all interrupt and clear all OTGSC status */
- temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
- temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK;
- temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
- fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
-
- /*
- * The identification (id) input is FALSE when a Mini-A plug is inserted
- * in the devices Mini-AB receptacle. Otherwise, this input is TRUE.
- * Also: record initial state of ID pin
- */
- if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) {
- p_otg->phy.state = OTG_STATE_UNDEFINED;
- p_otg->fsm.id = 1;
- } else {
- p_otg->phy.state = OTG_STATE_A_IDLE;
- p_otg->fsm.id = 0;
- }
-
- DBG("initial ID pin=%d\n", p_otg->fsm.id);
-
- /* enable OTG ID pin interrupt */
- temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
- temp |= OTGSC_INTR_USB_ID_EN;
- temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN);
- fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
-
- return 0;
-}
-
-/*
- * state file in sysfs
- */
-static int show_fsl_usb2_otg_state(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct otg_fsm *fsm = &fsl_otg_dev->fsm;
- char *next = buf;
- unsigned size = PAGE_SIZE;
- unsigned long flags;
- int t;
-
- spin_lock_irqsave(&fsm->lock, flags);
-
- /* basic driver infomation */
- t = scnprintf(next, size,
- DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n",
- DRIVER_VERSION);
- size -= t;
- next += t;
-
- /* Registers */
- t = scnprintf(next, size,
- "OTGSC: 0x%08x\n"
- "PORTSC: 0x%08x\n"
- "USBMODE: 0x%08x\n"
- "USBCMD: 0x%08x\n"
- "USBSTS: 0x%08x\n"
- "USBINTR: 0x%08x\n",
- fsl_readl(&usb_dr_regs->otgsc),
- fsl_readl(&usb_dr_regs->portsc),
- fsl_readl(&usb_dr_regs->usbmode),
- fsl_readl(&usb_dr_regs->usbcmd),
- fsl_readl(&usb_dr_regs->usbsts),
- fsl_readl(&usb_dr_regs->usbintr));
- size -= t;
- next += t;
-
- /* State */
- t = scnprintf(next, size,
- "OTG state: %s\n\n",
- usb_otg_state_string(fsl_otg_dev->phy.state));
- size -= t;
- next += t;
-
- /* State Machine Variables */
- t = scnprintf(next, size,
- "a_bus_req: %d\n"
- "b_bus_req: %d\n"
- "a_bus_resume: %d\n"
- "a_bus_suspend: %d\n"
- "a_conn: %d\n"
- "a_sess_vld: %d\n"
- "a_srp_det: %d\n"
- "a_vbus_vld: %d\n"
- "b_bus_resume: %d\n"
- "b_bus_suspend: %d\n"
- "b_conn: %d\n"
- "b_se0_srp: %d\n"
- "b_sess_end: %d\n"
- "b_sess_vld: %d\n"
- "id: %d\n",
- fsm->a_bus_req,
- fsm->b_bus_req,
- fsm->a_bus_resume,
- fsm->a_bus_suspend,
- fsm->a_conn,
- fsm->a_sess_vld,
- fsm->a_srp_det,
- fsm->a_vbus_vld,
- fsm->b_bus_resume,
- fsm->b_bus_suspend,
- fsm->b_conn,
- fsm->b_se0_srp,
- fsm->b_sess_end,
- fsm->b_sess_vld,
- fsm->id);
- size -= t;
- next += t;
-
- spin_unlock_irqrestore(&fsm->lock, flags);
-
- return PAGE_SIZE - size;
-}
-
-static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL);
-
-
-/* Char driver interface to control some OTG input */
-
-/*
- * Handle some ioctl command, such as get otg
- * status and set host suspend
- */
-static long fsl_otg_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- u32 retval = 0;
-
- switch (cmd) {
- case GET_OTG_STATUS:
- retval = fsl_otg_dev->host_working;
- break;
-
- case SET_A_SUSPEND_REQ:
- fsl_otg_dev->fsm.a_suspend_req = arg;
- break;
-
- case SET_A_BUS_DROP:
- fsl_otg_dev->fsm.a_bus_drop = arg;
- break;
-
- case SET_A_BUS_REQ:
- fsl_otg_dev->fsm.a_bus_req = arg;
- break;
-
- case SET_B_BUS_REQ:
- fsl_otg_dev->fsm.b_bus_req = arg;
- break;
-
- default:
- break;
- }
-
- otg_statemachine(&fsl_otg_dev->fsm);
-
- return retval;
-}
-
-static int fsl_otg_open(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static int fsl_otg_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static const struct file_operations otg_fops = {
- .owner = THIS_MODULE,
- .llseek = NULL,
- .read = NULL,
- .write = NULL,
- .unlocked_ioctl = fsl_otg_ioctl,
- .open = fsl_otg_open,
- .release = fsl_otg_release,
-};
-
-static int fsl_otg_probe(struct platform_device *pdev)
-{
- int ret;
-
- if (!pdev->dev.platform_data)
- return -ENODEV;
-
- /* configure the OTG */
- ret = fsl_otg_conf(pdev);
- if (ret) {
- dev_err(&pdev->dev, "Couldn't configure OTG module\n");
- return ret;
- }
-
- /* start OTG */
- ret = usb_otg_start(pdev);
- if (ret) {
- dev_err(&pdev->dev, "Can't init FSL OTG device\n");
- return ret;
- }
-
- ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops);
- if (ret) {
- dev_err(&pdev->dev, "unable to register FSL OTG device\n");
- return ret;
- }
-
- ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
- if (ret)
- dev_warn(&pdev->dev, "Can't register sysfs attribute\n");
-
- return ret;
-}
-
-static int fsl_otg_remove(struct platform_device *pdev)
-{
- struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
-
- usb_remove_phy(&fsl_otg_dev->phy);
- free_irq(fsl_otg_dev->irq, fsl_otg_dev);
-
- iounmap((void *)usb_dr_regs);
-
- fsl_otg_uninit_timers();
- kfree(fsl_otg_dev->phy.otg);
- kfree(fsl_otg_dev);
-
- device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
-
- unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
-
- if (pdata->exit)
- pdata->exit(pdev);
-
- return 0;
-}
-
-struct platform_driver fsl_otg_driver = {
- .probe = fsl_otg_probe,
- .remove = fsl_otg_remove,
- .driver = {
- .name = driver_name,
- .owner = THIS_MODULE,
- },
-};
-
-module_platform_driver(fsl_otg_driver);
-
-MODULE_DESCRIPTION(DRIVER_INFO);
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_LICENSE("GPL");
+++ /dev/null
-/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include "otg_fsm.h"
-#include <linux/usb/otg.h>
-#include <linux/ioctl.h>
-
-/* USB Command Register Bit Masks */
-#define USB_CMD_RUN_STOP (0x1<<0)
-#define USB_CMD_CTRL_RESET (0x1<<1)
-#define USB_CMD_PERIODIC_SCHEDULE_EN (0x1<<4)
-#define USB_CMD_ASYNC_SCHEDULE_EN (0x1<<5)
-#define USB_CMD_INT_AA_DOORBELL (0x1<<6)
-#define USB_CMD_ASP (0x3<<8)
-#define USB_CMD_ASYNC_SCH_PARK_EN (0x1<<11)
-#define USB_CMD_SUTW (0x1<<13)
-#define USB_CMD_ATDTW (0x1<<14)
-#define USB_CMD_ITC (0xFF<<16)
-
-/* bit 15,3,2 are frame list size */
-#define USB_CMD_FRAME_SIZE_1024 (0x0<<15 | 0x0<<2)
-#define USB_CMD_FRAME_SIZE_512 (0x0<<15 | 0x1<<2)
-#define USB_CMD_FRAME_SIZE_256 (0x0<<15 | 0x2<<2)
-#define USB_CMD_FRAME_SIZE_128 (0x0<<15 | 0x3<<2)
-#define USB_CMD_FRAME_SIZE_64 (0x1<<15 | 0x0<<2)
-#define USB_CMD_FRAME_SIZE_32 (0x1<<15 | 0x1<<2)
-#define USB_CMD_FRAME_SIZE_16 (0x1<<15 | 0x2<<2)
-#define USB_CMD_FRAME_SIZE_8 (0x1<<15 | 0x3<<2)
-
-/* bit 9-8 are async schedule park mode count */
-#define USB_CMD_ASP_00 (0x0<<8)
-#define USB_CMD_ASP_01 (0x1<<8)
-#define USB_CMD_ASP_10 (0x2<<8)
-#define USB_CMD_ASP_11 (0x3<<8)
-#define USB_CMD_ASP_BIT_POS (8)
-
-/* bit 23-16 are interrupt threshold control */
-#define USB_CMD_ITC_NO_THRESHOLD (0x00<<16)
-#define USB_CMD_ITC_1_MICRO_FRM (0x01<<16)
-#define USB_CMD_ITC_2_MICRO_FRM (0x02<<16)
-#define USB_CMD_ITC_4_MICRO_FRM (0x04<<16)
-#define USB_CMD_ITC_8_MICRO_FRM (0x08<<16)
-#define USB_CMD_ITC_16_MICRO_FRM (0x10<<16)
-#define USB_CMD_ITC_32_MICRO_FRM (0x20<<16)
-#define USB_CMD_ITC_64_MICRO_FRM (0x40<<16)
-#define USB_CMD_ITC_BIT_POS (16)
-
-/* USB Status Register Bit Masks */
-#define USB_STS_INT (0x1<<0)
-#define USB_STS_ERR (0x1<<1)
-#define USB_STS_PORT_CHANGE (0x1<<2)
-#define USB_STS_FRM_LST_ROLL (0x1<<3)
-#define USB_STS_SYS_ERR (0x1<<4)
-#define USB_STS_IAA (0x1<<5)
-#define USB_STS_RESET_RECEIVED (0x1<<6)
-#define USB_STS_SOF (0x1<<7)
-#define USB_STS_DCSUSPEND (0x1<<8)
-#define USB_STS_HC_HALTED (0x1<<12)
-#define USB_STS_RCL (0x1<<13)
-#define USB_STS_PERIODIC_SCHEDULE (0x1<<14)
-#define USB_STS_ASYNC_SCHEDULE (0x1<<15)
-
-/* USB Interrupt Enable Register Bit Masks */
-#define USB_INTR_INT_EN (0x1<<0)
-#define USB_INTR_ERR_INT_EN (0x1<<1)
-#define USB_INTR_PC_DETECT_EN (0x1<<2)
-#define USB_INTR_FRM_LST_ROLL_EN (0x1<<3)
-#define USB_INTR_SYS_ERR_EN (0x1<<4)
-#define USB_INTR_ASYN_ADV_EN (0x1<<5)
-#define USB_INTR_RESET_EN (0x1<<6)
-#define USB_INTR_SOF_EN (0x1<<7)
-#define USB_INTR_DEVICE_SUSPEND (0x1<<8)
-
-/* Device Address bit masks */
-#define USB_DEVICE_ADDRESS_MASK (0x7F<<25)
-#define USB_DEVICE_ADDRESS_BIT_POS (25)
-/* PORTSC Register Bit Masks,Only one PORT in OTG mode*/
-#define PORTSC_CURRENT_CONNECT_STATUS (0x1<<0)
-#define PORTSC_CONNECT_STATUS_CHANGE (0x1<<1)
-#define PORTSC_PORT_ENABLE (0x1<<2)
-#define PORTSC_PORT_EN_DIS_CHANGE (0x1<<3)
-#define PORTSC_OVER_CURRENT_ACT (0x1<<4)
-#define PORTSC_OVER_CUURENT_CHG (0x1<<5)
-#define PORTSC_PORT_FORCE_RESUME (0x1<<6)
-#define PORTSC_PORT_SUSPEND (0x1<<7)
-#define PORTSC_PORT_RESET (0x1<<8)
-#define PORTSC_LINE_STATUS_BITS (0x3<<10)
-#define PORTSC_PORT_POWER (0x1<<12)
-#define PORTSC_PORT_INDICTOR_CTRL (0x3<<14)
-#define PORTSC_PORT_TEST_CTRL (0xF<<16)
-#define PORTSC_WAKE_ON_CONNECT_EN (0x1<<20)
-#define PORTSC_WAKE_ON_CONNECT_DIS (0x1<<21)
-#define PORTSC_WAKE_ON_OVER_CURRENT (0x1<<22)
-#define PORTSC_PHY_LOW_POWER_SPD (0x1<<23)
-#define PORTSC_PORT_FORCE_FULL_SPEED (0x1<<24)
-#define PORTSC_PORT_SPEED_MASK (0x3<<26)
-#define PORTSC_TRANSCEIVER_WIDTH (0x1<<28)
-#define PORTSC_PHY_TYPE_SEL (0x3<<30)
-/* bit 11-10 are line status */
-#define PORTSC_LINE_STATUS_SE0 (0x0<<10)
-#define PORTSC_LINE_STATUS_JSTATE (0x1<<10)
-#define PORTSC_LINE_STATUS_KSTATE (0x2<<10)
-#define PORTSC_LINE_STATUS_UNDEF (0x3<<10)
-#define PORTSC_LINE_STATUS_BIT_POS (10)
-
-/* bit 15-14 are port indicator control */
-#define PORTSC_PIC_OFF (0x0<<14)
-#define PORTSC_PIC_AMBER (0x1<<14)
-#define PORTSC_PIC_GREEN (0x2<<14)
-#define PORTSC_PIC_UNDEF (0x3<<14)
-#define PORTSC_PIC_BIT_POS (14)
-
-/* bit 19-16 are port test control */
-#define PORTSC_PTC_DISABLE (0x0<<16)
-#define PORTSC_PTC_JSTATE (0x1<<16)
-#define PORTSC_PTC_KSTATE (0x2<<16)
-#define PORTSC_PTC_SEQNAK (0x3<<16)
-#define PORTSC_PTC_PACKET (0x4<<16)
-#define PORTSC_PTC_FORCE_EN (0x5<<16)
-#define PORTSC_PTC_BIT_POS (16)
-
-/* bit 27-26 are port speed */
-#define PORTSC_PORT_SPEED_FULL (0x0<<26)
-#define PORTSC_PORT_SPEED_LOW (0x1<<26)
-#define PORTSC_PORT_SPEED_HIGH (0x2<<26)
-#define PORTSC_PORT_SPEED_UNDEF (0x3<<26)
-#define PORTSC_SPEED_BIT_POS (26)
-
-/* bit 28 is parallel transceiver width for UTMI interface */
-#define PORTSC_PTW (0x1<<28)
-#define PORTSC_PTW_8BIT (0x0<<28)
-#define PORTSC_PTW_16BIT (0x1<<28)
-
-/* bit 31-30 are port transceiver select */
-#define PORTSC_PTS_UTMI (0x0<<30)
-#define PORTSC_PTS_ULPI (0x2<<30)
-#define PORTSC_PTS_FSLS_SERIAL (0x3<<30)
-#define PORTSC_PTS_BIT_POS (30)
-
-#define PORTSC_W1C_BITS \
- (PORTSC_CONNECT_STATUS_CHANGE | \
- PORTSC_PORT_EN_DIS_CHANGE | \
- PORTSC_OVER_CUURENT_CHG)
-
-/* OTG Status Control Register Bit Masks */
-#define OTGSC_CTRL_VBUS_DISCHARGE (0x1<<0)
-#define OTGSC_CTRL_VBUS_CHARGE (0x1<<1)
-#define OTGSC_CTRL_OTG_TERMINATION (0x1<<3)
-#define OTGSC_CTRL_DATA_PULSING (0x1<<4)
-#define OTGSC_CTRL_ID_PULL_EN (0x1<<5)
-#define OTGSC_HA_DATA_PULSE (0x1<<6)
-#define OTGSC_HA_BA (0x1<<7)
-#define OTGSC_STS_USB_ID (0x1<<8)
-#define OTGSC_STS_A_VBUS_VALID (0x1<<9)
-#define OTGSC_STS_A_SESSION_VALID (0x1<<10)
-#define OTGSC_STS_B_SESSION_VALID (0x1<<11)
-#define OTGSC_STS_B_SESSION_END (0x1<<12)
-#define OTGSC_STS_1MS_TOGGLE (0x1<<13)
-#define OTGSC_STS_DATA_PULSING (0x1<<14)
-#define OTGSC_INTSTS_USB_ID (0x1<<16)
-#define OTGSC_INTSTS_A_VBUS_VALID (0x1<<17)
-#define OTGSC_INTSTS_A_SESSION_VALID (0x1<<18)
-#define OTGSC_INTSTS_B_SESSION_VALID (0x1<<19)
-#define OTGSC_INTSTS_B_SESSION_END (0x1<<20)
-#define OTGSC_INTSTS_1MS (0x1<<21)
-#define OTGSC_INTSTS_DATA_PULSING (0x1<<22)
-#define OTGSC_INTR_USB_ID_EN (0x1<<24)
-#define OTGSC_INTR_A_VBUS_VALID_EN (0x1<<25)
-#define OTGSC_INTR_A_SESSION_VALID_EN (0x1<<26)
-#define OTGSC_INTR_B_SESSION_VALID_EN (0x1<<27)
-#define OTGSC_INTR_B_SESSION_END_EN (0x1<<28)
-#define OTGSC_INTR_1MS_TIMER_EN (0x1<<29)
-#define OTGSC_INTR_DATA_PULSING_EN (0x1<<30)
-#define OTGSC_INTSTS_MASK (0x00ff0000)
-
-/* USB MODE Register Bit Masks */
-#define USB_MODE_CTRL_MODE_IDLE (0x0<<0)
-#define USB_MODE_CTRL_MODE_DEVICE (0x2<<0)
-#define USB_MODE_CTRL_MODE_HOST (0x3<<0)
-#define USB_MODE_CTRL_MODE_RSV (0x1<<0)
-#define USB_MODE_SETUP_LOCK_OFF (0x1<<3)
-#define USB_MODE_STREAM_DISABLE (0x1<<4)
-#define USB_MODE_ES (0x1<<2) /* Endian Select */
-
-/* control Register Bit Masks */
-#define USB_CTRL_IOENB (0x1<<2)
-#define USB_CTRL_ULPI_INT0EN (0x1<<0)
-
-/* BCSR5 */
-#define BCSR5_INT_USB (0x02)
-
-/* USB module clk cfg */
-#define SCCR_OFFS (0xA08)
-#define SCCR_USB_CLK_DISABLE (0x00000000) /* USB clk disable */
-#define SCCR_USB_MPHCM_11 (0x00c00000)
-#define SCCR_USB_MPHCM_01 (0x00400000)
-#define SCCR_USB_MPHCM_10 (0x00800000)
-#define SCCR_USB_DRCM_11 (0x00300000)
-#define SCCR_USB_DRCM_01 (0x00100000)
-#define SCCR_USB_DRCM_10 (0x00200000)
-
-#define SICRL_OFFS (0x114)
-#define SICRL_USB0 (0x40000000)
-#define SICRL_USB1 (0x20000000)
-
-#define SICRH_OFFS (0x118)
-#define SICRH_USB_UTMI (0x00020000)
-
-/* OTG interrupt enable bit masks */
-#define OTGSC_INTERRUPT_ENABLE_BITS_MASK \
- (OTGSC_INTR_USB_ID_EN | \
- OTGSC_INTR_1MS_TIMER_EN | \
- OTGSC_INTR_A_VBUS_VALID_EN | \
- OTGSC_INTR_A_SESSION_VALID_EN | \
- OTGSC_INTR_B_SESSION_VALID_EN | \
- OTGSC_INTR_B_SESSION_END_EN | \
- OTGSC_INTR_DATA_PULSING_EN)
-
-/* OTG interrupt status bit masks */
-#define OTGSC_INTERRUPT_STATUS_BITS_MASK \
- (OTGSC_INTSTS_USB_ID | \
- OTGSC_INTR_1MS_TIMER_EN | \
- OTGSC_INTSTS_A_VBUS_VALID | \
- OTGSC_INTSTS_A_SESSION_VALID | \
- OTGSC_INTSTS_B_SESSION_VALID | \
- OTGSC_INTSTS_B_SESSION_END | \
- OTGSC_INTSTS_DATA_PULSING)
-
-/*
- * A-DEVICE timing constants
- */
-
-/* Wait for VBUS Rise */
-#define TA_WAIT_VRISE (100) /* a_wait_vrise 100 ms, section: 6.6.5.1 */
-
-/* Wait for B-Connect */
-#define TA_WAIT_BCON (10000) /* a_wait_bcon > 1 sec, section: 6.6.5.2
- * This is only used to get out of
- * OTG_STATE_A_WAIT_BCON state if there was
- * no connection for these many milliseconds
- */
-
-/* A-Idle to B-Disconnect */
-/* It is necessary for this timer to be more than 750 ms because of a bug in OPT
- * test 5.4 in which B OPT disconnects after 750 ms instead of 75ms as stated
- * in the test description
- */
-#define TA_AIDL_BDIS (5000) /* a_suspend minimum 200 ms, section: 6.6.5.3 */
-
-/* B-Idle to A-Disconnect */
-#define TA_BIDL_ADIS (12) /* 3 to 200 ms */
-
-/* B-device timing constants */
-
-
-/* Data-Line Pulse Time*/
-#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms, section:5.3.3 */
-#define TB_DATA_PLS_MIN (5) /* minimum 5 ms */
-#define TB_DATA_PLS_MAX (10) /* maximum 10 ms */
-
-/* SRP Initiate Time */
-#define TB_SRP_INIT (100) /* b_srp_init,maximum 100 ms, section:5.3.8 */
-
-/* SRP Fail Time */
-#define TB_SRP_FAIL (7000) /* b_srp_init,Fail time 5~30s, section:6.8.2.2*/
-
-/* SRP result wait time */
-#define TB_SRP_WAIT (60)
-
-/* VBus time */
-#define TB_VBUS_PLS (30) /* time to keep vbus pulsing asserted */
-
-/* Discharge time */
-/* This time should be less than 10ms. It varies from system to system. */
-#define TB_VBUS_DSCHRG (8)
-
-/* A-SE0 to B-Reset */
-#define TB_ASE0_BRST (20) /* b_wait_acon, mini 3.125 ms,section:6.8.2.4 */
-
-/* A bus suspend timer before we can switch to b_wait_aconn */
-#define TB_A_SUSPEND (7)
-#define TB_BUS_RESUME (12)
-
-/* SE0 Time Before SRP */
-#define TB_SE0_SRP (2) /* b_idle,minimum 2 ms, section:5.3.2 */
-
-#define SET_OTG_STATE(otg_ptr, newstate) ((otg_ptr)->state = newstate)
-
-struct usb_dr_mmap {
- /* Capability register */
- u8 res1[256];
- u16 caplength; /* Capability Register Length */
- u16 hciversion; /* Host Controller Interface Version */
- u32 hcsparams; /* Host Controller Structual Parameters */
- u32 hccparams; /* Host Controller Capability Parameters */
- u8 res2[20];
- u32 dciversion; /* Device Controller Interface Version */
- u32 dccparams; /* Device Controller Capability Parameters */
- u8 res3[24];
- /* Operation register */
- u32 usbcmd; /* USB Command Register */
- u32 usbsts; /* USB Status Register */
- u32 usbintr; /* USB Interrupt Enable Register */
- u32 frindex; /* Frame Index Register */
- u8 res4[4];
- u32 deviceaddr; /* Device Address */
- u32 endpointlistaddr; /* Endpoint List Address Register */
- u8 res5[4];
- u32 burstsize; /* Master Interface Data Burst Size Register */
- u32 txttfilltuning; /* Transmit FIFO Tuning Controls Register */
- u8 res6[8];
- u32 ulpiview; /* ULPI register access */
- u8 res7[12];
- u32 configflag; /* Configure Flag Register */
- u32 portsc; /* Port 1 Status and Control Register */
- u8 res8[28];
- u32 otgsc; /* On-The-Go Status and Control */
- u32 usbmode; /* USB Mode Register */
- u32 endptsetupstat; /* Endpoint Setup Status Register */
- u32 endpointprime; /* Endpoint Initialization Register */
- u32 endptflush; /* Endpoint Flush Register */
- u32 endptstatus; /* Endpoint Status Register */
- u32 endptcomplete; /* Endpoint Complete Register */
- u32 endptctrl[6]; /* Endpoint Control Registers */
- u8 res9[552];
- u32 snoop1;
- u32 snoop2;
- u32 age_cnt_thresh; /* Age Count Threshold Register */
- u32 pri_ctrl; /* Priority Control Register */
- u32 si_ctrl; /* System Interface Control Register */
- u8 res10[236];
- u32 control; /* General Purpose Control Register */
-};
-
-struct fsl_otg_timer {
- unsigned long expires; /* Number of count increase to timeout */
- unsigned long count; /* Tick counter */
- void (*function)(unsigned long); /* Timeout function */
- unsigned long data; /* Data passed to function */
- struct list_head list;
-};
-
-inline struct fsl_otg_timer *otg_timer_initializer
-(void (*function)(unsigned long), unsigned long expires, unsigned long data)
-{
- struct fsl_otg_timer *timer;
-
- timer = kmalloc(sizeof(struct fsl_otg_timer), GFP_KERNEL);
- if (!timer)
- return NULL;
- timer->function = function;
- timer->expires = expires;
- timer->data = data;
- return timer;
-}
-
-struct fsl_otg {
- struct usb_phy phy;
- struct otg_fsm fsm;
- struct usb_dr_mmap *dr_mem_map;
- struct delayed_work otg_event;
-
- /* used for usb host */
- struct work_struct work_wq;
- u8 host_working;
-
- int irq;
-};
-
-struct fsl_otg_config {
- u8 otg_port;
-};
-
-/* For SRP and HNP handle */
-#define FSL_OTG_MAJOR 240
-#define FSL_OTG_NAME "fsl-usb2-otg"
-/* Command to OTG driver ioctl */
-#define OTG_IOCTL_MAGIC FSL_OTG_MAJOR
-/* if otg work as host, it should return 1, otherwise return 0 */
-#define GET_OTG_STATUS _IOR(OTG_IOCTL_MAGIC, 1, int)
-#define SET_A_SUSPEND_REQ _IOW(OTG_IOCTL_MAGIC, 2, int)
-#define SET_A_BUS_DROP _IOW(OTG_IOCTL_MAGIC, 3, int)
-#define SET_A_BUS_REQ _IOW(OTG_IOCTL_MAGIC, 4, int)
-#define SET_B_BUS_REQ _IOW(OTG_IOCTL_MAGIC, 5, int)
-#define GET_A_SUSPEND_REQ _IOR(OTG_IOCTL_MAGIC, 6, int)
-#define GET_A_BUS_DROP _IOR(OTG_IOCTL_MAGIC, 7, int)
-#define GET_A_BUS_REQ _IOR(OTG_IOCTL_MAGIC, 8, int)
-#define GET_B_BUS_REQ _IOR(OTG_IOCTL_MAGIC, 9, int)
-
-void fsl_otg_add_timer(void *timer);
-void fsl_otg_del_timer(void *timer);
-void fsl_otg_pulse_vbus(void);
+++ /dev/null
-/*
- * gpio-vbus.c - simple GPIO VBUS sensing driver for B peripheral devices
- *
- * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/usb.h>
-#include <linux/workqueue.h>
-
-#include <linux/regulator/consumer.h>
-
-#include <linux/usb/gadget.h>
-#include <linux/usb/gpio_vbus.h>
-#include <linux/usb/otg.h>
-
-
-/*
- * A simple GPIO VBUS sensing driver for B peripheral only devices
- * with internal transceivers. It can control a D+ pullup GPIO and
- * a regulator to limit the current drawn from VBUS.
- *
- * Needs to be loaded before the UDC driver that will use it.
- */
-struct gpio_vbus_data {
- struct usb_phy phy;
- struct device *dev;
- struct regulator *vbus_draw;
- int vbus_draw_enabled;
- unsigned mA;
- struct delayed_work work;
- int vbus;
- int irq;
-};
-
-
-/*
- * This driver relies on "both edges" triggering. VBUS has 100 msec to
- * stabilize, so the peripheral controller driver may need to cope with
- * some bouncing due to current surges (e.g. charging local capacitance)
- * and contact chatter.
- *
- * REVISIT in desperate straits, toggling between rising and falling
- * edges might be workable.
- */
-#define VBUS_IRQ_FLAGS \
- (IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
-
-
-/* interface to regulator framework */
-static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA)
-{
- struct regulator *vbus_draw = gpio_vbus->vbus_draw;
- int enabled;
-
- if (!vbus_draw)
- return;
-
- enabled = gpio_vbus->vbus_draw_enabled;
- if (mA) {
- regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
- if (!enabled) {
- regulator_enable(vbus_draw);
- gpio_vbus->vbus_draw_enabled = 1;
- }
- } else {
- if (enabled) {
- regulator_disable(vbus_draw);
- gpio_vbus->vbus_draw_enabled = 0;
- }
- }
- gpio_vbus->mA = mA;
-}
-
-static int is_vbus_powered(struct gpio_vbus_mach_info *pdata)
-{
- int vbus;
-
- vbus = gpio_get_value(pdata->gpio_vbus);
- if (pdata->gpio_vbus_inverted)
- vbus = !vbus;
-
- return vbus;
-}
-
-static void gpio_vbus_work(struct work_struct *work)
-{
- struct gpio_vbus_data *gpio_vbus =
- container_of(work, struct gpio_vbus_data, work.work);
- struct gpio_vbus_mach_info *pdata = gpio_vbus->dev->platform_data;
- int gpio, status, vbus;
-
- if (!gpio_vbus->phy.otg->gadget)
- return;
-
- vbus = is_vbus_powered(pdata);
- if ((vbus ^ gpio_vbus->vbus) == 0)
- return;
- gpio_vbus->vbus = vbus;
-
- /* Peripheral controllers which manage the pullup themselves won't have
- * gpio_pullup configured here. If it's configured here, we'll do what
- * isp1301_omap::b_peripheral() does and enable the pullup here... although
- * that may complicate usb_gadget_{,dis}connect() support.
- */
- gpio = pdata->gpio_pullup;
-
- if (vbus) {
- status = USB_EVENT_VBUS;
- gpio_vbus->phy.state = OTG_STATE_B_PERIPHERAL;
- gpio_vbus->phy.last_event = status;
- usb_gadget_vbus_connect(gpio_vbus->phy.otg->gadget);
-
- /* drawing a "unit load" is *always* OK, except for OTG */
- set_vbus_draw(gpio_vbus, 100);
-
- /* optionally enable D+ pullup */
- if (gpio_is_valid(gpio))
- gpio_set_value(gpio, !pdata->gpio_pullup_inverted);
-
- atomic_notifier_call_chain(&gpio_vbus->phy.notifier,
- status, gpio_vbus->phy.otg->gadget);
- } else {
- /* optionally disable D+ pullup */
- if (gpio_is_valid(gpio))
- gpio_set_value(gpio, pdata->gpio_pullup_inverted);
-
- set_vbus_draw(gpio_vbus, 0);
-
- usb_gadget_vbus_disconnect(gpio_vbus->phy.otg->gadget);
- status = USB_EVENT_NONE;
- gpio_vbus->phy.state = OTG_STATE_B_IDLE;
- gpio_vbus->phy.last_event = status;
-
- atomic_notifier_call_chain(&gpio_vbus->phy.notifier,
- status, gpio_vbus->phy.otg->gadget);
- }
-}
-
-/* VBUS change IRQ handler */
-static irqreturn_t gpio_vbus_irq(int irq, void *data)
-{
- struct platform_device *pdev = data;
- struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
- struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
- struct usb_otg *otg = gpio_vbus->phy.otg;
-
- dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n",
- is_vbus_powered(pdata) ? "supplied" : "inactive",
- otg->gadget ? otg->gadget->name : "none");
-
- if (otg->gadget)
- schedule_delayed_work(&gpio_vbus->work, msecs_to_jiffies(100));
-
- return IRQ_HANDLED;
-}
-
-/* OTG transceiver interface */
-
-/* bind/unbind the peripheral controller */
-static int gpio_vbus_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- struct gpio_vbus_data *gpio_vbus;
- struct gpio_vbus_mach_info *pdata;
- struct platform_device *pdev;
- int gpio;
-
- gpio_vbus = container_of(otg->phy, struct gpio_vbus_data, phy);
- pdev = to_platform_device(gpio_vbus->dev);
- pdata = gpio_vbus->dev->platform_data;
- gpio = pdata->gpio_pullup;
-
- if (!gadget) {
- dev_dbg(&pdev->dev, "unregistering gadget '%s'\n",
- otg->gadget->name);
-
- /* optionally disable D+ pullup */
- if (gpio_is_valid(gpio))
- gpio_set_value(gpio, pdata->gpio_pullup_inverted);
-
- set_vbus_draw(gpio_vbus, 0);
-
- usb_gadget_vbus_disconnect(otg->gadget);
- otg->phy->state = OTG_STATE_UNDEFINED;
-
- otg->gadget = NULL;
- return 0;
- }
-
- otg->gadget = gadget;
- dev_dbg(&pdev->dev, "registered gadget '%s'\n", gadget->name);
-
- /* initialize connection state */
- gpio_vbus->vbus = 0; /* start with disconnected */
- gpio_vbus_irq(gpio_vbus->irq, pdev);
- return 0;
-}
-
-/* effective for B devices, ignored for A-peripheral */
-static int gpio_vbus_set_power(struct usb_phy *phy, unsigned mA)
-{
- struct gpio_vbus_data *gpio_vbus;
-
- gpio_vbus = container_of(phy, struct gpio_vbus_data, phy);
-
- if (phy->state == OTG_STATE_B_PERIPHERAL)
- set_vbus_draw(gpio_vbus, mA);
- return 0;
-}
-
-/* for non-OTG B devices: set/clear transceiver suspend mode */
-static int gpio_vbus_set_suspend(struct usb_phy *phy, int suspend)
-{
- struct gpio_vbus_data *gpio_vbus;
-
- gpio_vbus = container_of(phy, struct gpio_vbus_data, phy);
-
- /* draw max 0 mA from vbus in suspend mode; or the previously
- * recorded amount of current if not suspended
- *
- * NOTE: high powered configs (mA > 100) may draw up to 2.5 mA
- * if they're wake-enabled ... we don't handle that yet.
- */
- return gpio_vbus_set_power(phy, suspend ? 0 : gpio_vbus->mA);
-}
-
-/* platform driver interface */
-
-static int __init gpio_vbus_probe(struct platform_device *pdev)
-{
- struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
- struct gpio_vbus_data *gpio_vbus;
- struct resource *res;
- int err, gpio, irq;
- unsigned long irqflags;
-
- if (!pdata || !gpio_is_valid(pdata->gpio_vbus))
- return -EINVAL;
- gpio = pdata->gpio_vbus;
-
- gpio_vbus = kzalloc(sizeof(struct gpio_vbus_data), GFP_KERNEL);
- if (!gpio_vbus)
- return -ENOMEM;
-
- gpio_vbus->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
- if (!gpio_vbus->phy.otg) {
- kfree(gpio_vbus);
- return -ENOMEM;
- }
-
- platform_set_drvdata(pdev, gpio_vbus);
- gpio_vbus->dev = &pdev->dev;
- gpio_vbus->phy.label = "gpio-vbus";
- gpio_vbus->phy.set_power = gpio_vbus_set_power;
- gpio_vbus->phy.set_suspend = gpio_vbus_set_suspend;
- gpio_vbus->phy.state = OTG_STATE_UNDEFINED;
-
- gpio_vbus->phy.otg->phy = &gpio_vbus->phy;
- gpio_vbus->phy.otg->set_peripheral = gpio_vbus_set_peripheral;
-
- err = gpio_request(gpio, "vbus_detect");
- if (err) {
- dev_err(&pdev->dev, "can't request vbus gpio %d, err: %d\n",
- gpio, err);
- goto err_gpio;
- }
- gpio_direction_input(gpio);
-
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (res) {
- irq = res->start;
- irqflags = (res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED;
- } else {
- irq = gpio_to_irq(gpio);
- irqflags = VBUS_IRQ_FLAGS;
- }
-
- gpio_vbus->irq = irq;
-
- /* if data line pullup is in use, initialize it to "not pulling up" */
- gpio = pdata->gpio_pullup;
- if (gpio_is_valid(gpio)) {
- err = gpio_request(gpio, "udc_pullup");
- if (err) {
- dev_err(&pdev->dev,
- "can't request pullup gpio %d, err: %d\n",
- gpio, err);
- gpio_free(pdata->gpio_vbus);
- goto err_gpio;
- }
- gpio_direction_output(gpio, pdata->gpio_pullup_inverted);
- }
-
- err = request_irq(irq, gpio_vbus_irq, irqflags, "vbus_detect", pdev);
- if (err) {
- dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
- irq, err);
- goto err_irq;
- }
-
- ATOMIC_INIT_NOTIFIER_HEAD(&gpio_vbus->phy.notifier);
-
- INIT_DELAYED_WORK(&gpio_vbus->work, gpio_vbus_work);
-
- gpio_vbus->vbus_draw = regulator_get(&pdev->dev, "vbus_draw");
- if (IS_ERR(gpio_vbus->vbus_draw)) {
- dev_dbg(&pdev->dev, "can't get vbus_draw regulator, err: %ld\n",
- PTR_ERR(gpio_vbus->vbus_draw));
- gpio_vbus->vbus_draw = NULL;
- }
-
- /* only active when a gadget is registered */
- err = usb_add_phy(&gpio_vbus->phy, USB_PHY_TYPE_USB2);
- if (err) {
- dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
- err);
- goto err_otg;
- }
-
- device_init_wakeup(&pdev->dev, pdata->wakeup);
-
- return 0;
-err_otg:
- regulator_put(gpio_vbus->vbus_draw);
- free_irq(irq, pdev);
-err_irq:
- if (gpio_is_valid(pdata->gpio_pullup))
- gpio_free(pdata->gpio_pullup);
- gpio_free(pdata->gpio_vbus);
-err_gpio:
- platform_set_drvdata(pdev, NULL);
- kfree(gpio_vbus->phy.otg);
- kfree(gpio_vbus);
- return err;
-}
-
-static int __exit gpio_vbus_remove(struct platform_device *pdev)
-{
- struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
- struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
- int gpio = pdata->gpio_vbus;
-
- device_init_wakeup(&pdev->dev, 0);
- cancel_delayed_work_sync(&gpio_vbus->work);
- regulator_put(gpio_vbus->vbus_draw);
-
- usb_remove_phy(&gpio_vbus->phy);
-
- free_irq(gpio_vbus->irq, pdev);
- if (gpio_is_valid(pdata->gpio_pullup))
- gpio_free(pdata->gpio_pullup);
- gpio_free(gpio);
- platform_set_drvdata(pdev, NULL);
- kfree(gpio_vbus->phy.otg);
- kfree(gpio_vbus);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int gpio_vbus_pm_suspend(struct device *dev)
-{
- struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev);
-
- if (device_may_wakeup(dev))
- enable_irq_wake(gpio_vbus->irq);
-
- return 0;
-}
-
-static int gpio_vbus_pm_resume(struct device *dev)
-{
- struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev);
-
- if (device_may_wakeup(dev))
- disable_irq_wake(gpio_vbus->irq);
-
- return 0;
-}
-
-static const struct dev_pm_ops gpio_vbus_dev_pm_ops = {
- .suspend = gpio_vbus_pm_suspend,
- .resume = gpio_vbus_pm_resume,
-};
-#endif
-
-/* NOTE: the gpio-vbus device may *NOT* be hotplugged */
-
-MODULE_ALIAS("platform:gpio-vbus");
-
-static struct platform_driver gpio_vbus_driver = {
- .driver = {
- .name = "gpio-vbus",
- .owner = THIS_MODULE,
-#ifdef CONFIG_PM
- .pm = &gpio_vbus_dev_pm_ops,
-#endif
- },
- .remove = __exit_p(gpio_vbus_remove),
-};
-
-module_platform_driver_probe(gpio_vbus_driver, gpio_vbus_probe);
-
-MODULE_DESCRIPTION("simple GPIO controlled OTG transceiver driver");
-MODULE_AUTHOR("Philipp Zabel");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
- *
- * Copyright (C) 2004 Texas Instruments
- * Copyright (C) 2004 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb.h>
-#include <linux/usb/otg.h>
-#include <linux/i2c.h>
-#include <linux/workqueue.h>
-
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-
-#include <mach/mux.h>
-
-#include <mach/usb.h>
-
-#ifndef DEBUG
-#undef VERBOSE
-#endif
-
-
-#define DRIVER_VERSION "24 August 2004"
-#define DRIVER_NAME (isp1301_driver.driver.name)
-
-MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
-MODULE_LICENSE("GPL");
-
-struct isp1301 {
- struct usb_phy phy;
- struct i2c_client *client;
- void (*i2c_release)(struct device *dev);
-
- int irq_type;
-
- u32 last_otg_ctrl;
- unsigned working:1;
-
- struct timer_list timer;
-
- /* use keventd context to change the state for us */
- struct work_struct work;
-
- unsigned long todo;
-# define WORK_UPDATE_ISP 0 /* update ISP from OTG */
-# define WORK_UPDATE_OTG 1 /* update OTG from ISP */
-# define WORK_HOST_RESUME 4 /* resume host */
-# define WORK_TIMER 6 /* timer fired */
-# define WORK_STOP 7 /* don't resubmit */
-};
-
-
-/* bits in OTG_CTRL */
-
-#define OTG_XCEIV_OUTPUTS \
- (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
-#define OTG_XCEIV_INPUTS \
- (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
-#define OTG_CTRL_BITS \
- (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
- /* and OTG_PULLUP is sometimes written */
-
-#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
- OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
- OTG_CTRL_BITS)
-
-
-/*-------------------------------------------------------------------------*/
-
-/* board-specific PM hooks */
-
-#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
-
-#if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
-
-#include <linux/i2c/tps65010.h>
-
-#else
-
-static inline int tps65010_set_vbus_draw(unsigned mA)
-{
- pr_debug("tps65010: draw %d mA (STUB)\n", mA);
- return 0;
-}
-
-#endif
-
-static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
-{
- int status = tps65010_set_vbus_draw(mA);
- if (status < 0)
- pr_debug(" VBUS %d mA error %d\n", mA, status);
-}
-
-#else
-
-static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
-{
- /* H4 controls this by DIP switch S2.4; no soft control.
- * ON means the charger is always enabled. Leave it OFF
- * unless the OTG port is used only in B-peripheral mode.
- */
-}
-
-#endif
-
-static void enable_vbus_source(struct isp1301 *isp)
-{
- /* this board won't supply more than 8mA vbus power.
- * some boards can switch a 100ma "unit load" (or more).
- */
-}
-
-
-/* products will deliver OTG messages with LEDs, GUI, etc */
-static inline void notresponding(struct isp1301 *isp)
-{
- printk(KERN_NOTICE "OTG device not responding.\n");
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static struct i2c_driver isp1301_driver;
-
-/* smbus apis are used for portability */
-
-static inline u8
-isp1301_get_u8(struct isp1301 *isp, u8 reg)
-{
- return i2c_smbus_read_byte_data(isp->client, reg + 0);
-}
-
-static inline int
-isp1301_get_u16(struct isp1301 *isp, u8 reg)
-{
- return i2c_smbus_read_word_data(isp->client, reg);
-}
-
-static inline int
-isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
-{
- return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
-}
-
-static inline int
-isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
-{
- return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* identification */
-#define ISP1301_VENDOR_ID 0x00 /* u16 read */
-#define ISP1301_PRODUCT_ID 0x02 /* u16 read */
-#define ISP1301_BCD_DEVICE 0x14 /* u16 read */
-
-#define I2C_VENDOR_ID_PHILIPS 0x04cc
-#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
-
-/* operational registers */
-#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
-# define MC1_SPEED (1 << 0)
-# define MC1_SUSPEND (1 << 1)
-# define MC1_DAT_SE0 (1 << 2)
-# define MC1_TRANSPARENT (1 << 3)
-# define MC1_BDIS_ACON_EN (1 << 4)
-# define MC1_OE_INT_EN (1 << 5)
-# define MC1_UART_EN (1 << 6)
-# define MC1_MASK 0x7f
-#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
-# define MC2_GLOBAL_PWR_DN (1 << 0)
-# define MC2_SPD_SUSP_CTRL (1 << 1)
-# define MC2_BI_DI (1 << 2)
-# define MC2_TRANSP_BDIR0 (1 << 3)
-# define MC2_TRANSP_BDIR1 (1 << 4)
-# define MC2_AUDIO_EN (1 << 5)
-# define MC2_PSW_EN (1 << 6)
-# define MC2_EN2V7 (1 << 7)
-#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
-# define OTG1_DP_PULLUP (1 << 0)
-# define OTG1_DM_PULLUP (1 << 1)
-# define OTG1_DP_PULLDOWN (1 << 2)
-# define OTG1_DM_PULLDOWN (1 << 3)
-# define OTG1_ID_PULLDOWN (1 << 4)
-# define OTG1_VBUS_DRV (1 << 5)
-# define OTG1_VBUS_DISCHRG (1 << 6)
-# define OTG1_VBUS_CHRG (1 << 7)
-#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
-# define OTG_B_SESS_END (1 << 6)
-# define OTG_B_SESS_VLD (1 << 7)
-
-#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
-#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
-
-#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
-#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
-
-/* same bitfields in all interrupt registers */
-# define INTR_VBUS_VLD (1 << 0)
-# define INTR_SESS_VLD (1 << 1)
-# define INTR_DP_HI (1 << 2)
-# define INTR_ID_GND (1 << 3)
-# define INTR_DM_HI (1 << 4)
-# define INTR_ID_FLOAT (1 << 5)
-# define INTR_BDIS_ACON (1 << 6)
-# define INTR_CR_INT (1 << 7)
-
-/*-------------------------------------------------------------------------*/
-
-static inline const char *state_name(struct isp1301 *isp)
-{
- return usb_otg_state_string(isp->phy.state);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* NOTE: some of this ISP1301 setup is specific to H2 boards;
- * not everything is guarded by board-specific checks, or even using
- * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
- *
- * ALSO: this currently doesn't use ISP1301 low-power modes
- * while OTG is running.
- */
-
-static void power_down(struct isp1301 *isp)
-{
- isp->phy.state = OTG_STATE_UNDEFINED;
-
- // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
-
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
-}
-
-static void power_up(struct isp1301 *isp)
-{
- // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
-
- /* do this only when cpu is driving transceiver,
- * so host won't see a low speed device...
- */
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
-}
-
-#define NO_HOST_SUSPEND
-
-static int host_suspend(struct isp1301 *isp)
-{
-#ifdef NO_HOST_SUSPEND
- return 0;
-#else
- struct device *dev;
-
- if (!isp->phy.otg->host)
- return -ENODEV;
-
- /* Currently ASSUMES only the OTG port matters;
- * other ports could be active...
- */
- dev = isp->phy.otg->host->controller;
- return dev->driver->suspend(dev, 3, 0);
-#endif
-}
-
-static int host_resume(struct isp1301 *isp)
-{
-#ifdef NO_HOST_SUSPEND
- return 0;
-#else
- struct device *dev;
-
- if (!isp->phy.otg->host)
- return -ENODEV;
-
- dev = isp->phy.otg->host->controller;
- return dev->driver->resume(dev, 0);
-#endif
-}
-
-static int gadget_suspend(struct isp1301 *isp)
-{
- isp->phy.otg->gadget->b_hnp_enable = 0;
- isp->phy.otg->gadget->a_hnp_support = 0;
- isp->phy.otg->gadget->a_alt_hnp_support = 0;
- return usb_gadget_vbus_disconnect(isp->phy.otg->gadget);
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define TIMER_MINUTES 10
-#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
-
-/* Almost all our I2C messaging comes from a work queue's task context.
- * NOTE: guaranteeing certain response times might mean we shouldn't
- * share keventd's work queue; a realtime task might be safest.
- */
-static void isp1301_defer_work(struct isp1301 *isp, int work)
-{
- int status;
-
- if (isp && !test_and_set_bit(work, &isp->todo)) {
- (void) get_device(&isp->client->dev);
- status = schedule_work(&isp->work);
- if (!status && !isp->working)
- dev_vdbg(&isp->client->dev,
- "work item %d may be lost\n", work);
- }
-}
-
-/* called from irq handlers */
-static void a_idle(struct isp1301 *isp, const char *tag)
-{
- u32 l;
-
- if (isp->phy.state == OTG_STATE_A_IDLE)
- return;
-
- isp->phy.otg->default_a = 1;
- if (isp->phy.otg->host) {
- isp->phy.otg->host->is_b_host = 0;
- host_suspend(isp);
- }
- if (isp->phy.otg->gadget) {
- isp->phy.otg->gadget->is_a_peripheral = 1;
- gadget_suspend(isp);
- }
- isp->phy.state = OTG_STATE_A_IDLE;
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
- isp->last_otg_ctrl = l;
- pr_debug(" --> %s/%s\n", state_name(isp), tag);
-}
-
-/* called from irq handlers */
-static void b_idle(struct isp1301 *isp, const char *tag)
-{
- u32 l;
-
- if (isp->phy.state == OTG_STATE_B_IDLE)
- return;
-
- isp->phy.otg->default_a = 0;
- if (isp->phy.otg->host) {
- isp->phy.otg->host->is_b_host = 1;
- host_suspend(isp);
- }
- if (isp->phy.otg->gadget) {
- isp->phy.otg->gadget->is_a_peripheral = 0;
- gadget_suspend(isp);
- }
- isp->phy.state = OTG_STATE_B_IDLE;
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
- isp->last_otg_ctrl = l;
- pr_debug(" --> %s/%s\n", state_name(isp), tag);
-}
-
-static void
-dump_regs(struct isp1301 *isp, const char *label)
-{
-#ifdef DEBUG
- u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
- u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
- u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
-
- pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
- omap_readl(OTG_CTRL), label, state_name(isp),
- ctrl, status, src);
- /* mode control and irq enables don't change much */
-#endif
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_USB_OTG
-
-/*
- * The OMAP OTG controller handles most of the OTG state transitions.
- *
- * We translate isp1301 outputs (mostly voltage comparator status) into
- * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
- * flags into isp1301 inputs ... and infer state transitions.
- */
-
-#ifdef VERBOSE
-
-static void check_state(struct isp1301 *isp, const char *tag)
-{
- enum usb_otg_state state = OTG_STATE_UNDEFINED;
- u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
- unsigned extra = 0;
-
- switch (fsm) {
-
- /* default-b */
- case 0x0:
- state = OTG_STATE_B_IDLE;
- break;
- case 0x3:
- case 0x7:
- extra = 1;
- case 0x1:
- state = OTG_STATE_B_PERIPHERAL;
- break;
- case 0x11:
- state = OTG_STATE_B_SRP_INIT;
- break;
-
- /* extra dual-role default-b states */
- case 0x12:
- case 0x13:
- case 0x16:
- extra = 1;
- case 0x17:
- state = OTG_STATE_B_WAIT_ACON;
- break;
- case 0x34:
- state = OTG_STATE_B_HOST;
- break;
-
- /* default-a */
- case 0x36:
- state = OTG_STATE_A_IDLE;
- break;
- case 0x3c:
- state = OTG_STATE_A_WAIT_VFALL;
- break;
- case 0x7d:
- state = OTG_STATE_A_VBUS_ERR;
- break;
- case 0x9e:
- case 0x9f:
- extra = 1;
- case 0x89:
- state = OTG_STATE_A_PERIPHERAL;
- break;
- case 0xb7:
- state = OTG_STATE_A_WAIT_VRISE;
- break;
- case 0xb8:
- state = OTG_STATE_A_WAIT_BCON;
- break;
- case 0xb9:
- state = OTG_STATE_A_HOST;
- break;
- case 0xba:
- state = OTG_STATE_A_SUSPEND;
- break;
- default:
- break;
- }
- if (isp->phy.state == state && !extra)
- return;
- pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
- usb_otg_state_string(state), fsm, state_name(isp),
- omap_readl(OTG_CTRL));
-}
-
-#else
-
-static inline void check_state(struct isp1301 *isp, const char *tag) { }
-
-#endif
-
-/* outputs from ISP1301_INTERRUPT_SOURCE */
-static void update_otg1(struct isp1301 *isp, u8 int_src)
-{
- u32 otg_ctrl;
-
- otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- otg_ctrl &= ~OTG_XCEIV_INPUTS;
- otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
-
- if (int_src & INTR_SESS_VLD)
- otg_ctrl |= OTG_ASESSVLD;
- else if (isp->phy.state == OTG_STATE_A_WAIT_VFALL) {
- a_idle(isp, "vfall");
- otg_ctrl &= ~OTG_CTRL_BITS;
- }
- if (int_src & INTR_VBUS_VLD)
- otg_ctrl |= OTG_VBUSVLD;
- if (int_src & INTR_ID_GND) { /* default-A */
- if (isp->phy.state == OTG_STATE_B_IDLE
- || isp->phy.state
- == OTG_STATE_UNDEFINED) {
- a_idle(isp, "init");
- return;
- }
- } else { /* default-B */
- otg_ctrl |= OTG_ID;
- if (isp->phy.state == OTG_STATE_A_IDLE
- || isp->phy.state == OTG_STATE_UNDEFINED) {
- b_idle(isp, "init");
- return;
- }
- }
- omap_writel(otg_ctrl, OTG_CTRL);
-}
-
-/* outputs from ISP1301_OTG_STATUS */
-static void update_otg2(struct isp1301 *isp, u8 otg_status)
-{
- u32 otg_ctrl;
-
- otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- otg_ctrl &= ~OTG_XCEIV_INPUTS;
- otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
- if (otg_status & OTG_B_SESS_VLD)
- otg_ctrl |= OTG_BSESSVLD;
- else if (otg_status & OTG_B_SESS_END)
- otg_ctrl |= OTG_BSESSEND;
- omap_writel(otg_ctrl, OTG_CTRL);
-}
-
-/* inputs going to ISP1301 */
-static void otg_update_isp(struct isp1301 *isp)
-{
- u32 otg_ctrl, otg_change;
- u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
-
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_change = otg_ctrl ^ isp->last_otg_ctrl;
- isp->last_otg_ctrl = otg_ctrl;
- otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
-
- switch (isp->phy.state) {
- case OTG_STATE_B_IDLE:
- case OTG_STATE_B_PERIPHERAL:
- case OTG_STATE_B_SRP_INIT:
- if (!(otg_ctrl & OTG_PULLUP)) {
- // if (otg_ctrl & OTG_B_HNPEN) {
- if (isp->phy.otg->gadget->b_hnp_enable) {
- isp->phy.state = OTG_STATE_B_WAIT_ACON;
- pr_debug(" --> b_wait_acon\n");
- }
- goto pulldown;
- }
-pullup:
- set |= OTG1_DP_PULLUP;
- clr |= OTG1_DP_PULLDOWN;
- break;
- case OTG_STATE_A_SUSPEND:
- case OTG_STATE_A_PERIPHERAL:
- if (otg_ctrl & OTG_PULLUP)
- goto pullup;
- /* FALLTHROUGH */
- // case OTG_STATE_B_WAIT_ACON:
- default:
-pulldown:
- set |= OTG1_DP_PULLDOWN;
- clr |= OTG1_DP_PULLUP;
- break;
- }
-
-# define toggle(OTG,ISP) do { \
- if (otg_ctrl & OTG) set |= ISP; \
- else clr |= ISP; \
- } while (0)
-
- if (!(isp->phy.otg->host))
- otg_ctrl &= ~OTG_DRV_VBUS;
-
- switch (isp->phy.state) {
- case OTG_STATE_A_SUSPEND:
- if (otg_ctrl & OTG_DRV_VBUS) {
- set |= OTG1_VBUS_DRV;
- break;
- }
- /* HNP failed for some reason (A_AIDL_BDIS timeout) */
- notresponding(isp);
-
- /* FALLTHROUGH */
- case OTG_STATE_A_VBUS_ERR:
- isp->phy.state = OTG_STATE_A_WAIT_VFALL;
- pr_debug(" --> a_wait_vfall\n");
- /* FALLTHROUGH */
- case OTG_STATE_A_WAIT_VFALL:
- /* FIXME usbcore thinks port power is still on ... */
- clr |= OTG1_VBUS_DRV;
- break;
- case OTG_STATE_A_IDLE:
- if (otg_ctrl & OTG_DRV_VBUS) {
- isp->phy.state = OTG_STATE_A_WAIT_VRISE;
- pr_debug(" --> a_wait_vrise\n");
- }
- /* FALLTHROUGH */
- default:
- toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
- }
-
- toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
- toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
-
-# undef toggle
-
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
-
- /* HNP switch to host or peripheral; and SRP */
- if (otg_change & OTG_PULLUP) {
- u32 l;
-
- switch (isp->phy.state) {
- case OTG_STATE_B_IDLE:
- if (clr & OTG1_DP_PULLUP)
- break;
- isp->phy.state = OTG_STATE_B_PERIPHERAL;
- pr_debug(" --> b_peripheral\n");
- break;
- case OTG_STATE_A_SUSPEND:
- if (clr & OTG1_DP_PULLUP)
- break;
- isp->phy.state = OTG_STATE_A_PERIPHERAL;
- pr_debug(" --> a_peripheral\n");
- break;
- default:
- break;
- }
- l = omap_readl(OTG_CTRL);
- l |= OTG_PULLUP;
- omap_writel(l, OTG_CTRL);
- }
-
- check_state(isp, __func__);
- dump_regs(isp, "otg->isp1301");
-}
-
-static irqreturn_t omap_otg_irq(int irq, void *_isp)
-{
- u16 otg_irq = omap_readw(OTG_IRQ_SRC);
- u32 otg_ctrl;
- int ret = IRQ_NONE;
- struct isp1301 *isp = _isp;
- struct usb_otg *otg = isp->phy.otg;
-
- /* update ISP1301 transceiver from OTG controller */
- if (otg_irq & OPRT_CHG) {
- omap_writew(OPRT_CHG, OTG_IRQ_SRC);
- isp1301_defer_work(isp, WORK_UPDATE_ISP);
- ret = IRQ_HANDLED;
-
- /* SRP to become b_peripheral failed */
- } else if (otg_irq & B_SRP_TMROUT) {
- pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
- notresponding(isp);
-
- /* gadget drivers that care should monitor all kinds of
- * remote wakeup (SRP, normal) using their own timer
- * to give "check cable and A-device" messages.
- */
- if (isp->phy.state == OTG_STATE_B_SRP_INIT)
- b_idle(isp, "srp_timeout");
-
- omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* HNP to become b_host failed */
- } else if (otg_irq & B_HNP_FAIL) {
- pr_debug("otg: %s B_HNP_FAIL, %06x\n",
- state_name(isp), omap_readl(OTG_CTRL));
- notresponding(isp);
-
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_ctrl |= OTG_BUSDROP;
- otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl, OTG_CTRL);
-
- /* subset of b_peripheral()... */
- isp->phy.state = OTG_STATE_B_PERIPHERAL;
- pr_debug(" --> b_peripheral\n");
-
- omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* detect SRP from B-device ... */
- } else if (otg_irq & A_SRP_DETECT) {
- pr_debug("otg: %s SRP_DETECT, %06x\n",
- state_name(isp), omap_readl(OTG_CTRL));
-
- isp1301_defer_work(isp, WORK_UPDATE_OTG);
- switch (isp->phy.state) {
- case OTG_STATE_A_IDLE:
- if (!otg->host)
- break;
- isp1301_defer_work(isp, WORK_HOST_RESUME);
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_ctrl |= OTG_A_BUSREQ;
- otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
- & ~OTG_XCEIV_INPUTS
- & OTG_CTRL_MASK;
- omap_writel(otg_ctrl, OTG_CTRL);
- break;
- default:
- break;
- }
-
- omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
- * we don't track them separately
- */
- } else if (otg_irq & A_REQ_TMROUT) {
- otg_ctrl = omap_readl(OTG_CTRL);
- pr_info("otg: BCON_TMOUT from %s, %06x\n",
- state_name(isp), otg_ctrl);
- notresponding(isp);
-
- otg_ctrl |= OTG_BUSDROP;
- otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl, OTG_CTRL);
- isp->phy.state = OTG_STATE_A_WAIT_VFALL;
-
- omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* A-supplied voltage fell too low; overcurrent */
- } else if (otg_irq & A_VBUS_ERR) {
- otg_ctrl = omap_readl(OTG_CTRL);
- printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
- state_name(isp), otg_irq, otg_ctrl);
-
- otg_ctrl |= OTG_BUSDROP;
- otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl, OTG_CTRL);
- isp->phy.state = OTG_STATE_A_VBUS_ERR;
-
- omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* switch driver; the transceiver code activates it,
- * ungating the udc clock or resuming OHCI.
- */
- } else if (otg_irq & DRIVER_SWITCH) {
- int kick = 0;
-
- otg_ctrl = omap_readl(OTG_CTRL);
- printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
- state_name(isp),
- (otg_ctrl & OTG_DRIVER_SEL)
- ? "gadget" : "host",
- otg_ctrl);
- isp1301_defer_work(isp, WORK_UPDATE_ISP);
-
- /* role is peripheral */
- if (otg_ctrl & OTG_DRIVER_SEL) {
- switch (isp->phy.state) {
- case OTG_STATE_A_IDLE:
- b_idle(isp, __func__);
- break;
- default:
- break;
- }
- isp1301_defer_work(isp, WORK_UPDATE_ISP);
-
- /* role is host */
- } else {
- if (!(otg_ctrl & OTG_ID)) {
- otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
- }
-
- if (otg->host) {
- switch (isp->phy.state) {
- case OTG_STATE_B_WAIT_ACON:
- isp->phy.state = OTG_STATE_B_HOST;
- pr_debug(" --> b_host\n");
- kick = 1;
- break;
- case OTG_STATE_A_WAIT_BCON:
- isp->phy.state = OTG_STATE_A_HOST;
- pr_debug(" --> a_host\n");
- break;
- case OTG_STATE_A_PERIPHERAL:
- isp->phy.state = OTG_STATE_A_WAIT_BCON;
- pr_debug(" --> a_wait_bcon\n");
- break;
- default:
- break;
- }
- isp1301_defer_work(isp, WORK_HOST_RESUME);
- }
- }
-
- omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- if (kick)
- usb_bus_start_enum(otg->host, otg->host->otg_port);
- }
-
- check_state(isp, __func__);
- return ret;
-}
-
-static struct platform_device *otg_dev;
-
-static int isp1301_otg_init(struct isp1301 *isp)
-{
- u32 l;
-
- if (!otg_dev)
- return -ENODEV;
-
- dump_regs(isp, __func__);
- /* some of these values are board-specific... */
- l = omap_readl(OTG_SYSCON_2);
- l |= OTG_EN
- /* for B-device: */
- | SRP_GPDATA /* 9msec Bdev D+ pulse */
- | SRP_GPDVBUS /* discharge after VBUS pulse */
- // | (3 << 24) /* 2msec VBUS pulse */
- /* for A-device: */
- | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
- | SRP_DPW /* detect 167+ns SRP pulses */
- | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
- ;
- omap_writel(l, OTG_SYSCON_2);
-
- update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
- update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
-
- check_state(isp, __func__);
- pr_debug("otg: %s, %s %06x\n",
- state_name(isp), __func__, omap_readl(OTG_CTRL));
-
- omap_writew(DRIVER_SWITCH | OPRT_CHG
- | B_SRP_TMROUT | B_HNP_FAIL
- | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
-
- l = omap_readl(OTG_SYSCON_2);
- l |= OTG_EN;
- omap_writel(l, OTG_SYSCON_2);
-
- return 0;
-}
-
-static int otg_probe(struct platform_device *dev)
-{
- // struct omap_usb_config *config = dev->platform_data;
-
- otg_dev = dev;
- return 0;
-}
-
-static int otg_remove(struct platform_device *dev)
-{
- otg_dev = NULL;
- return 0;
-}
-
-static struct platform_driver omap_otg_driver = {
- .probe = otg_probe,
- .remove = otg_remove,
- .driver = {
- .owner = THIS_MODULE,
- .name = "omap_otg",
- },
-};
-
-static int otg_bind(struct isp1301 *isp)
-{
- int status;
-
- if (otg_dev)
- return -EBUSY;
-
- status = platform_driver_register(&omap_otg_driver);
- if (status < 0)
- return status;
-
- if (otg_dev)
- status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
- 0, DRIVER_NAME, isp);
- else
- status = -ENODEV;
-
- if (status < 0)
- platform_driver_unregister(&omap_otg_driver);
- return status;
-}
-
-static void otg_unbind(struct isp1301 *isp)
-{
- if (!otg_dev)
- return;
- free_irq(otg_dev->resource[1].start, isp);
-}
-
-#else
-
-/* OTG controller isn't clocked */
-
-#endif /* CONFIG_USB_OTG */
-
-/*-------------------------------------------------------------------------*/
-
-static void b_peripheral(struct isp1301 *isp)
-{
- u32 l;
-
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
-
- usb_gadget_vbus_connect(isp->phy.otg->gadget);
-
-#ifdef CONFIG_USB_OTG
- enable_vbus_draw(isp, 8);
- otg_update_isp(isp);
-#else
- enable_vbus_draw(isp, 100);
- /* UDC driver just set OTG_BSESSVLD */
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
- isp->phy.state = OTG_STATE_B_PERIPHERAL;
- pr_debug(" --> b_peripheral\n");
- dump_regs(isp, "2periph");
-#endif
-}
-
-static void isp_update_otg(struct isp1301 *isp, u8 stat)
-{
- struct usb_otg *otg = isp->phy.otg;
- u8 isp_stat, isp_bstat;
- enum usb_otg_state state = isp->phy.state;
-
- if (stat & INTR_BDIS_ACON)
- pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
-
- /* start certain state transitions right away */
- isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
- if (isp_stat & INTR_ID_GND) {
- if (otg->default_a) {
- switch (state) {
- case OTG_STATE_B_IDLE:
- a_idle(isp, "idle");
- /* FALLTHROUGH */
- case OTG_STATE_A_IDLE:
- enable_vbus_source(isp);
- /* FALLTHROUGH */
- case OTG_STATE_A_WAIT_VRISE:
- /* we skip over OTG_STATE_A_WAIT_BCON, since
- * the HC will transition to A_HOST (or
- * A_SUSPEND!) without our noticing except
- * when HNP is used.
- */
- if (isp_stat & INTR_VBUS_VLD)
- isp->phy.state = OTG_STATE_A_HOST;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- if (!(isp_stat & INTR_SESS_VLD))
- a_idle(isp, "vfell");
- break;
- default:
- if (!(isp_stat & INTR_VBUS_VLD))
- isp->phy.state = OTG_STATE_A_VBUS_ERR;
- break;
- }
- isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
- } else {
- switch (state) {
- case OTG_STATE_B_PERIPHERAL:
- case OTG_STATE_B_HOST:
- case OTG_STATE_B_WAIT_ACON:
- usb_gadget_vbus_disconnect(otg->gadget);
- break;
- default:
- break;
- }
- if (state != OTG_STATE_A_IDLE)
- a_idle(isp, "id");
- if (otg->host && state == OTG_STATE_A_IDLE)
- isp1301_defer_work(isp, WORK_HOST_RESUME);
- isp_bstat = 0;
- }
- } else {
- u32 l;
-
- /* if user unplugged mini-A end of cable,
- * don't bypass A_WAIT_VFALL.
- */
- if (otg->default_a) {
- switch (state) {
- default:
- isp->phy.state = OTG_STATE_A_WAIT_VFALL;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- state = OTG_STATE_A_IDLE;
- /* khubd may take a while to notice and
- * handle this disconnect, so don't go
- * to B_IDLE quite yet.
- */
- break;
- case OTG_STATE_A_IDLE:
- host_suspend(isp);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
- MC1_BDIS_ACON_EN);
- isp->phy.state = OTG_STATE_B_IDLE;
- l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- l &= ~OTG_CTRL_BITS;
- omap_writel(l, OTG_CTRL);
- break;
- case OTG_STATE_B_IDLE:
- break;
- }
- }
- isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
-
- switch (isp->phy.state) {
- case OTG_STATE_B_PERIPHERAL:
- case OTG_STATE_B_WAIT_ACON:
- case OTG_STATE_B_HOST:
- if (likely(isp_bstat & OTG_B_SESS_VLD))
- break;
- enable_vbus_draw(isp, 0);
-#ifndef CONFIG_USB_OTG
- /* UDC driver will clear OTG_BSESSVLD */
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
- OTG1_DP_PULLDOWN);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
- OTG1_DP_PULLUP);
- dump_regs(isp, __func__);
-#endif
- /* FALLTHROUGH */
- case OTG_STATE_B_SRP_INIT:
- b_idle(isp, __func__);
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
- /* FALLTHROUGH */
- case OTG_STATE_B_IDLE:
- if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) {
-#ifdef CONFIG_USB_OTG
- update_otg1(isp, isp_stat);
- update_otg2(isp, isp_bstat);
-#endif
- b_peripheral(isp);
- } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
- isp_bstat |= OTG_B_SESS_END;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- break;
- default:
- pr_debug("otg: unsupported b-device %s\n",
- state_name(isp));
- break;
- }
- }
-
- if (state != isp->phy.state)
- pr_debug(" isp, %s -> %s\n",
- usb_otg_state_string(state), state_name(isp));
-
-#ifdef CONFIG_USB_OTG
- /* update the OTG controller state to match the isp1301; may
- * trigger OPRT_CHG irqs for changes going to the isp1301.
- */
- update_otg1(isp, isp_stat);
- update_otg2(isp, isp_bstat);
- check_state(isp, __func__);
-#endif
-
- dump_regs(isp, "isp1301->otg");
-}
-
-/*-------------------------------------------------------------------------*/
-
-static u8 isp1301_clear_latch(struct isp1301 *isp)
-{
- u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
- return latch;
-}
-
-static void
-isp1301_work(struct work_struct *work)
-{
- struct isp1301 *isp = container_of(work, struct isp1301, work);
- int stop;
-
- /* implicit lock: we're the only task using this device */
- isp->working = 1;
- do {
- stop = test_bit(WORK_STOP, &isp->todo);
-
-#ifdef CONFIG_USB_OTG
- /* transfer state from otg engine to isp1301 */
- if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
- otg_update_isp(isp);
- put_device(&isp->client->dev);
- }
-#endif
- /* transfer state from isp1301 to otg engine */
- if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
- u8 stat = isp1301_clear_latch(isp);
-
- isp_update_otg(isp, stat);
- put_device(&isp->client->dev);
- }
-
- if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
- u32 otg_ctrl;
-
- /*
- * skip A_WAIT_VRISE; hc transitions invisibly
- * skip A_WAIT_BCON; same.
- */
- switch (isp->phy.state) {
- case OTG_STATE_A_WAIT_BCON:
- case OTG_STATE_A_WAIT_VRISE:
- isp->phy.state = OTG_STATE_A_HOST;
- pr_debug(" --> a_host\n");
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_ctrl |= OTG_A_BUSREQ;
- otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
- & OTG_CTRL_MASK;
- omap_writel(otg_ctrl, OTG_CTRL);
- break;
- case OTG_STATE_B_WAIT_ACON:
- isp->phy.state = OTG_STATE_B_HOST;
- pr_debug(" --> b_host (acon)\n");
- break;
- case OTG_STATE_B_HOST:
- case OTG_STATE_B_IDLE:
- case OTG_STATE_A_IDLE:
- break;
- default:
- pr_debug(" host resume in %s\n",
- state_name(isp));
- }
- host_resume(isp);
- // mdelay(10);
- put_device(&isp->client->dev);
- }
-
- if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
-#ifdef VERBOSE
- dump_regs(isp, "timer");
- if (!stop)
- mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
-#endif
- put_device(&isp->client->dev);
- }
-
- if (isp->todo)
- dev_vdbg(&isp->client->dev,
- "work done, todo = 0x%lx\n",
- isp->todo);
- if (stop) {
- dev_dbg(&isp->client->dev, "stop\n");
- break;
- }
- } while (isp->todo);
- isp->working = 0;
-}
-
-static irqreturn_t isp1301_irq(int irq, void *isp)
-{
- isp1301_defer_work(isp, WORK_UPDATE_OTG);
- return IRQ_HANDLED;
-}
-
-static void isp1301_timer(unsigned long _isp)
-{
- isp1301_defer_work((void *)_isp, WORK_TIMER);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void isp1301_release(struct device *dev)
-{
- struct isp1301 *isp;
-
- isp = dev_get_drvdata(dev);
-
- /* FIXME -- not with a "new style" driver, it doesn't!! */
-
- /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
- if (isp->i2c_release)
- isp->i2c_release(dev);
- kfree(isp->phy.otg);
- kfree (isp);
-}
-
-static struct isp1301 *the_transceiver;
-
-static int __exit isp1301_remove(struct i2c_client *i2c)
-{
- struct isp1301 *isp;
-
- isp = i2c_get_clientdata(i2c);
-
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
- free_irq(i2c->irq, isp);
-#ifdef CONFIG_USB_OTG
- otg_unbind(isp);
-#endif
- if (machine_is_omap_h2())
- gpio_free(2);
-
- isp->timer.data = 0;
- set_bit(WORK_STOP, &isp->todo);
- del_timer_sync(&isp->timer);
- flush_work(&isp->work);
-
- put_device(&i2c->dev);
- the_transceiver = NULL;
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* NOTE: three modes are possible here, only one of which
- * will be standards-conformant on any given system:
- *
- * - OTG mode (dual-role), required if there's a Mini-AB connector
- * - HOST mode, for when there's one or more A (host) connectors
- * - DEVICE mode, for when there's a B/Mini-B (device) connector
- *
- * As a rule, you won't have an isp1301 chip unless it's there to
- * support the OTG mode. Other modes help testing USB controllers
- * in isolation from (full) OTG support, or maybe so later board
- * revisions can help to support those feature.
- */
-
-#ifdef CONFIG_USB_OTG
-
-static int isp1301_otg_enable(struct isp1301 *isp)
-{
- power_up(isp);
- isp1301_otg_init(isp);
-
- /* NOTE: since we don't change this, this provides
- * a few more interrupts than are strictly needed.
- */
- isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
- INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
- isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
- INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
-
- dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
-
- return 0;
-}
-
-#endif
-
-/* add or disable the host device+driver */
-static int
-isp1301_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
-
- if (!otg || isp != the_transceiver)
- return -ENODEV;
-
- if (!host) {
- omap_writew(0, OTG_IRQ_EN);
- power_down(isp);
- otg->host = NULL;
- return 0;
- }
-
-#ifdef CONFIG_USB_OTG
- otg->host = host;
- dev_dbg(&isp->client->dev, "registered host\n");
- host_suspend(isp);
- if (otg->gadget)
- return isp1301_otg_enable(isp);
- return 0;
-
-#elif !defined(CONFIG_USB_GADGET_OMAP)
- // FIXME update its refcount
- otg->host = host;
-
- power_up(isp);
-
- if (machine_is_omap_h2())
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
-
- dev_info(&isp->client->dev, "A-Host sessions ok\n");
- isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
- INTR_ID_GND);
- isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
- INTR_ID_GND);
-
- /* If this has a Mini-AB connector, this mode is highly
- * nonstandard ... but can be handy for testing, especially with
- * the Mini-A end of an OTG cable. (Or something nonstandard
- * like MiniB-to-StandardB, maybe built with a gender mender.)
- */
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
-
- dump_regs(isp, __func__);
-
- return 0;
-
-#else
- dev_dbg(&isp->client->dev, "host sessions not allowed\n");
- return -EINVAL;
-#endif
-
-}
-
-static int
-isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
-{
- struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
-
- if (!otg || isp != the_transceiver)
- return -ENODEV;
-
- if (!gadget) {
- omap_writew(0, OTG_IRQ_EN);
- if (!otg->default_a)
- enable_vbus_draw(isp, 0);
- usb_gadget_vbus_disconnect(otg->gadget);
- otg->gadget = NULL;
- power_down(isp);
- return 0;
- }
-
-#ifdef CONFIG_USB_OTG
- otg->gadget = gadget;
- dev_dbg(&isp->client->dev, "registered gadget\n");
- /* gadget driver may be suspended until vbus_connect () */
- if (otg->host)
- return isp1301_otg_enable(isp);
- return 0;
-
-#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
- otg->gadget = gadget;
- // FIXME update its refcount
-
- {
- u32 l;
-
- l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
- l |= OTG_ID;
- omap_writel(l, OTG_CTRL);
- }
-
- power_up(isp);
- isp->phy.state = OTG_STATE_B_IDLE;
-
- if (machine_is_omap_h2() || machine_is_omap_h3())
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
-
- isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
- INTR_SESS_VLD);
- isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
- INTR_VBUS_VLD);
- dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
- dump_regs(isp, __func__);
-
- /* If this has a Mini-AB connector, this mode is highly
- * nonstandard ... but can be handy for testing, so long
- * as you don't plug a Mini-A cable into the jack.
- */
- if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
- b_peripheral(isp);
-
- return 0;
-
-#else
- dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
- return -EINVAL;
-#endif
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int
-isp1301_set_power(struct usb_phy *dev, unsigned mA)
-{
- if (!the_transceiver)
- return -ENODEV;
- if (dev->state == OTG_STATE_B_PERIPHERAL)
- enable_vbus_draw(the_transceiver, mA);
- return 0;
-}
-
-static int
-isp1301_start_srp(struct usb_otg *otg)
-{
- struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
- u32 otg_ctrl;
-
- if (!otg || isp != the_transceiver
- || isp->phy.state != OTG_STATE_B_IDLE)
- return -ENODEV;
-
- otg_ctrl = omap_readl(OTG_CTRL);
- if (!(otg_ctrl & OTG_BSESSEND))
- return -EINVAL;
-
- otg_ctrl |= OTG_B_BUSREQ;
- otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
- omap_writel(otg_ctrl, OTG_CTRL);
- isp->phy.state = OTG_STATE_B_SRP_INIT;
-
- pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
- omap_readl(OTG_CTRL));
-#ifdef CONFIG_USB_OTG
- check_state(isp, __func__);
-#endif
- return 0;
-}
-
-static int
-isp1301_start_hnp(struct usb_otg *otg)
-{
-#ifdef CONFIG_USB_OTG
- struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
- u32 l;
-
- if (!otg || isp != the_transceiver)
- return -ENODEV;
- if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable))
- return -ENOTCONN;
- if (!otg->default_a && (otg->gadget == NULL
- || !otg->gadget->b_hnp_enable))
- return -ENOTCONN;
-
- /* We want hardware to manage most HNP protocol timings.
- * So do this part as early as possible...
- */
- switch (isp->phy.state) {
- case OTG_STATE_B_HOST:
- isp->phy.state = OTG_STATE_B_PERIPHERAL;
- /* caller will suspend next */
- break;
- case OTG_STATE_A_HOST:
-#if 0
- /* autoconnect mode avoids irq latency bugs */
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
- MC1_BDIS_ACON_EN);
-#endif
- /* caller must suspend then clear A_BUSREQ */
- usb_gadget_vbus_connect(otg->gadget);
- l = omap_readl(OTG_CTRL);
- l |= OTG_A_SETB_HNPEN;
- omap_writel(l, OTG_CTRL);
-
- break;
- case OTG_STATE_A_PERIPHERAL:
- /* initiated by B-Host suspend */
- break;
- default:
- return -EILSEQ;
- }
- pr_debug("otg: HNP %s, %06x ...\n",
- state_name(isp), omap_readl(OTG_CTRL));
- check_state(isp, __func__);
- return 0;
-#else
- /* srp-only */
- return -EINVAL;
-#endif
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int
-isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
-{
- int status;
- struct isp1301 *isp;
-
- if (the_transceiver)
- return 0;
-
- isp = kzalloc(sizeof *isp, GFP_KERNEL);
- if (!isp)
- return 0;
-
- isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL);
- if (!isp->phy.otg) {
- kfree(isp);
- return 0;
- }
-
- INIT_WORK(&isp->work, isp1301_work);
- init_timer(&isp->timer);
- isp->timer.function = isp1301_timer;
- isp->timer.data = (unsigned long) isp;
-
- i2c_set_clientdata(i2c, isp);
- isp->client = i2c;
-
- /* verify the chip (shouldn't be necessary) */
- status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
- if (status != I2C_VENDOR_ID_PHILIPS) {
- dev_dbg(&i2c->dev, "not philips id: %d\n", status);
- goto fail;
- }
- status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
- if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
- dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
- goto fail;
- }
- isp->i2c_release = i2c->dev.release;
- i2c->dev.release = isp1301_release;
-
- /* initial development used chiprev 2.00 */
- status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
- dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
- status >> 8, status & 0xff);
-
- /* make like power-on reset */
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
-
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
-
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
- OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
- ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
-
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
-
-#ifdef CONFIG_USB_OTG
- status = otg_bind(isp);
- if (status < 0) {
- dev_dbg(&i2c->dev, "can't bind OTG\n");
- goto fail;
- }
-#endif
-
- if (machine_is_omap_h2()) {
- /* full speed signaling by default */
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
- MC1_SPEED);
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
- MC2_SPD_SUSP_CTRL);
-
- /* IRQ wired at M14 */
- omap_cfg_reg(M14_1510_GPIO2);
- if (gpio_request(2, "isp1301") == 0)
- gpio_direction_input(2);
- isp->irq_type = IRQF_TRIGGER_FALLING;
- }
-
- status = request_irq(i2c->irq, isp1301_irq,
- isp->irq_type, DRIVER_NAME, isp);
- if (status < 0) {
- dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
- i2c->irq, status);
- goto fail;
- }
-
- isp->phy.dev = &i2c->dev;
- isp->phy.label = DRIVER_NAME;
- isp->phy.set_power = isp1301_set_power,
-
- isp->phy.otg->phy = &isp->phy;
- isp->phy.otg->set_host = isp1301_set_host,
- isp->phy.otg->set_peripheral = isp1301_set_peripheral,
- isp->phy.otg->start_srp = isp1301_start_srp,
- isp->phy.otg->start_hnp = isp1301_start_hnp,
-
- enable_vbus_draw(isp, 0);
- power_down(isp);
- the_transceiver = isp;
-
-#ifdef CONFIG_USB_OTG
- update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
- update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
-#endif
-
- dump_regs(isp, __func__);
-
-#ifdef VERBOSE
- mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
- dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
-#endif
-
- status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
- if (status < 0)
- dev_err(&i2c->dev, "can't register transceiver, %d\n",
- status);
-
- return 0;
-
-fail:
- kfree(isp->phy.otg);
- kfree(isp);
- return -ENODEV;
-}
-
-static const struct i2c_device_id isp1301_id[] = {
- { "isp1301_omap", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, isp1301_id);
-
-static struct i2c_driver isp1301_driver = {
- .driver = {
- .name = "isp1301_omap",
- },
- .probe = isp1301_probe,
- .remove = __exit_p(isp1301_remove),
- .id_table = isp1301_id,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int __init isp_init(void)
-{
- return i2c_add_driver(&isp1301_driver);
-}
-subsys_initcall(isp_init);
-
-static void __exit isp_exit(void)
-{
- if (the_transceiver)
- usb_remove_phy(&the_transceiver->phy);
- i2c_del_driver(&isp1301_driver);
-}
-module_exit(isp_exit);
-
+++ /dev/null
-/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- */
-
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/uaccess.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/pm_runtime.h>
-
-#include <linux/usb.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/ulpi.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/hcd.h>
-#include <linux/usb/msm_hsusb.h>
-#include <linux/usb/msm_hsusb_hw.h>
-#include <linux/regulator/consumer.h>
-
-#include <mach/clk.h>
-
-#define MSM_USB_BASE (motg->regs)
-#define DRIVER_NAME "msm_otg"
-
-#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
-
-#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */
-#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */
-#define USB_PHY_3P3_HPM_LOAD 50000 /* uA */
-#define USB_PHY_3P3_LPM_LOAD 4000 /* uA */
-
-#define USB_PHY_1P8_VOL_MIN 1800000 /* uV */
-#define USB_PHY_1P8_VOL_MAX 1800000 /* uV */
-#define USB_PHY_1P8_HPM_LOAD 50000 /* uA */
-#define USB_PHY_1P8_LPM_LOAD 4000 /* uA */
-
-#define USB_PHY_VDD_DIG_VOL_MIN 1000000 /* uV */
-#define USB_PHY_VDD_DIG_VOL_MAX 1320000 /* uV */
-
-static struct regulator *hsusb_3p3;
-static struct regulator *hsusb_1p8;
-static struct regulator *hsusb_vddcx;
-
-static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
-{
- int ret = 0;
-
- if (init) {
- hsusb_vddcx = regulator_get(motg->phy.dev, "HSUSB_VDDCX");
- if (IS_ERR(hsusb_vddcx)) {
- dev_err(motg->phy.dev, "unable to get hsusb vddcx\n");
- return PTR_ERR(hsusb_vddcx);
- }
-
- ret = regulator_set_voltage(hsusb_vddcx,
- USB_PHY_VDD_DIG_VOL_MIN,
- USB_PHY_VDD_DIG_VOL_MAX);
- if (ret) {
- dev_err(motg->phy.dev, "unable to set the voltage "
- "for hsusb vddcx\n");
- regulator_put(hsusb_vddcx);
- return ret;
- }
-
- ret = regulator_enable(hsusb_vddcx);
- if (ret) {
- dev_err(motg->phy.dev, "unable to enable hsusb vddcx\n");
- regulator_put(hsusb_vddcx);
- }
- } else {
- ret = regulator_set_voltage(hsusb_vddcx, 0,
- USB_PHY_VDD_DIG_VOL_MAX);
- if (ret)
- dev_err(motg->phy.dev, "unable to set the voltage "
- "for hsusb vddcx\n");
- ret = regulator_disable(hsusb_vddcx);
- if (ret)
- dev_err(motg->phy.dev, "unable to disable hsusb vddcx\n");
-
- regulator_put(hsusb_vddcx);
- }
-
- return ret;
-}
-
-static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
-{
- int rc = 0;
-
- if (init) {
- hsusb_3p3 = regulator_get(motg->phy.dev, "HSUSB_3p3");
- if (IS_ERR(hsusb_3p3)) {
- dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
- return PTR_ERR(hsusb_3p3);
- }
-
- rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN,
- USB_PHY_3P3_VOL_MAX);
- if (rc) {
- dev_err(motg->phy.dev, "unable to set voltage level "
- "for hsusb 3p3\n");
- goto put_3p3;
- }
- rc = regulator_enable(hsusb_3p3);
- if (rc) {
- dev_err(motg->phy.dev, "unable to enable the hsusb 3p3\n");
- goto put_3p3;
- }
- hsusb_1p8 = regulator_get(motg->phy.dev, "HSUSB_1p8");
- if (IS_ERR(hsusb_1p8)) {
- dev_err(motg->phy.dev, "unable to get hsusb 1p8\n");
- rc = PTR_ERR(hsusb_1p8);
- goto disable_3p3;
- }
- rc = regulator_set_voltage(hsusb_1p8, USB_PHY_1P8_VOL_MIN,
- USB_PHY_1P8_VOL_MAX);
- if (rc) {
- dev_err(motg->phy.dev, "unable to set voltage level "
- "for hsusb 1p8\n");
- goto put_1p8;
- }
- rc = regulator_enable(hsusb_1p8);
- if (rc) {
- dev_err(motg->phy.dev, "unable to enable the hsusb 1p8\n");
- goto put_1p8;
- }
-
- return 0;
- }
-
- regulator_disable(hsusb_1p8);
-put_1p8:
- regulator_put(hsusb_1p8);
-disable_3p3:
- regulator_disable(hsusb_3p3);
-put_3p3:
- regulator_put(hsusb_3p3);
- return rc;
-}
-
-#ifdef CONFIG_PM_SLEEP
-#define USB_PHY_SUSP_DIG_VOL 500000
-static int msm_hsusb_config_vddcx(int high)
-{
- int max_vol = USB_PHY_VDD_DIG_VOL_MAX;
- int min_vol;
- int ret;
-
- if (high)
- min_vol = USB_PHY_VDD_DIG_VOL_MIN;
- else
- min_vol = USB_PHY_SUSP_DIG_VOL;
-
- ret = regulator_set_voltage(hsusb_vddcx, min_vol, max_vol);
- if (ret) {
- pr_err("%s: unable to set the voltage for regulator "
- "HSUSB_VDDCX\n", __func__);
- return ret;
- }
-
- pr_debug("%s: min_vol:%d max_vol:%d\n", __func__, min_vol, max_vol);
-
- return ret;
-}
-#endif
-
-static int msm_hsusb_ldo_set_mode(int on)
-{
- int ret = 0;
-
- if (!hsusb_1p8 || IS_ERR(hsusb_1p8)) {
- pr_err("%s: HSUSB_1p8 is not initialized\n", __func__);
- return -ENODEV;
- }
-
- if (!hsusb_3p3 || IS_ERR(hsusb_3p3)) {
- pr_err("%s: HSUSB_3p3 is not initialized\n", __func__);
- return -ENODEV;
- }
-
- if (on) {
- ret = regulator_set_optimum_mode(hsusb_1p8,
- USB_PHY_1P8_HPM_LOAD);
- if (ret < 0) {
- pr_err("%s: Unable to set HPM of the regulator "
- "HSUSB_1p8\n", __func__);
- return ret;
- }
- ret = regulator_set_optimum_mode(hsusb_3p3,
- USB_PHY_3P3_HPM_LOAD);
- if (ret < 0) {
- pr_err("%s: Unable to set HPM of the regulator "
- "HSUSB_3p3\n", __func__);
- regulator_set_optimum_mode(hsusb_1p8,
- USB_PHY_1P8_LPM_LOAD);
- return ret;
- }
- } else {
- ret = regulator_set_optimum_mode(hsusb_1p8,
- USB_PHY_1P8_LPM_LOAD);
- if (ret < 0)
- pr_err("%s: Unable to set LPM of the regulator "
- "HSUSB_1p8\n", __func__);
- ret = regulator_set_optimum_mode(hsusb_3p3,
- USB_PHY_3P3_LPM_LOAD);
- if (ret < 0)
- pr_err("%s: Unable to set LPM of the regulator "
- "HSUSB_3p3\n", __func__);
- }
-
- pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
- return ret < 0 ? ret : 0;
-}
-
-static int ulpi_read(struct usb_phy *phy, u32 reg)
-{
- struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
- int cnt = 0;
-
- /* initiate read operation */
- writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg),
- USB_ULPI_VIEWPORT);
-
- /* wait for completion */
- while (cnt < ULPI_IO_TIMEOUT_USEC) {
- if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
- break;
- udelay(1);
- cnt++;
- }
-
- if (cnt >= ULPI_IO_TIMEOUT_USEC) {
- dev_err(phy->dev, "ulpi_read: timeout %08x\n",
- readl(USB_ULPI_VIEWPORT));
- return -ETIMEDOUT;
- }
- return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT));
-}
-
-static int ulpi_write(struct usb_phy *phy, u32 val, u32 reg)
-{
- struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
- int cnt = 0;
-
- /* initiate write operation */
- writel(ULPI_RUN | ULPI_WRITE |
- ULPI_ADDR(reg) | ULPI_DATA(val),
- USB_ULPI_VIEWPORT);
-
- /* wait for completion */
- while (cnt < ULPI_IO_TIMEOUT_USEC) {
- if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
- break;
- udelay(1);
- cnt++;
- }
-
- if (cnt >= ULPI_IO_TIMEOUT_USEC) {
- dev_err(phy->dev, "ulpi_write: timeout\n");
- return -ETIMEDOUT;
- }
- return 0;
-}
-
-static struct usb_phy_io_ops msm_otg_io_ops = {
- .read = ulpi_read,
- .write = ulpi_write,
-};
-
-static void ulpi_init(struct msm_otg *motg)
-{
- struct msm_otg_platform_data *pdata = motg->pdata;
- int *seq = pdata->phy_init_seq;
-
- if (!seq)
- return;
-
- while (seq[0] >= 0) {
- dev_vdbg(motg->phy.dev, "ulpi: write 0x%02x to 0x%02x\n",
- seq[0], seq[1]);
- ulpi_write(&motg->phy, seq[0], seq[1]);
- seq += 2;
- }
-}
-
-static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
-{
- int ret;
-
- if (assert) {
- ret = clk_reset(motg->clk, CLK_RESET_ASSERT);
- if (ret)
- dev_err(motg->phy.dev, "usb hs_clk assert failed\n");
- } else {
- ret = clk_reset(motg->clk, CLK_RESET_DEASSERT);
- if (ret)
- dev_err(motg->phy.dev, "usb hs_clk deassert failed\n");
- }
- return ret;
-}
-
-static int msm_otg_phy_clk_reset(struct msm_otg *motg)
-{
- int ret;
-
- ret = clk_reset(motg->phy_reset_clk, CLK_RESET_ASSERT);
- if (ret) {
- dev_err(motg->phy.dev, "usb phy clk assert failed\n");
- return ret;
- }
- usleep_range(10000, 12000);
- ret = clk_reset(motg->phy_reset_clk, CLK_RESET_DEASSERT);
- if (ret)
- dev_err(motg->phy.dev, "usb phy clk deassert failed\n");
- return ret;
-}
-
-static int msm_otg_phy_reset(struct msm_otg *motg)
-{
- u32 val;
- int ret;
- int retries;
-
- ret = msm_otg_link_clk_reset(motg, 1);
- if (ret)
- return ret;
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
- ret = msm_otg_link_clk_reset(motg, 0);
- if (ret)
- return ret;
-
- val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
- writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
-
- for (retries = 3; retries > 0; retries--) {
- ret = ulpi_write(&motg->phy, ULPI_FUNC_CTRL_SUSPENDM,
- ULPI_CLR(ULPI_FUNC_CTRL));
- if (!ret)
- break;
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
- }
- if (!retries)
- return -ETIMEDOUT;
-
- /* This reset calibrates the phy, if the above write succeeded */
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
-
- for (retries = 3; retries > 0; retries--) {
- ret = ulpi_read(&motg->phy, ULPI_DEBUG);
- if (ret != -ETIMEDOUT)
- break;
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
- }
- if (!retries)
- return -ETIMEDOUT;
-
- dev_info(motg->phy.dev, "phy_reset: success\n");
- return 0;
-}
-
-#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
-static int msm_otg_reset(struct usb_phy *phy)
-{
- struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
- struct msm_otg_platform_data *pdata = motg->pdata;
- int cnt = 0;
- int ret;
- u32 val = 0;
- u32 ulpi_val = 0;
-
- ret = msm_otg_phy_reset(motg);
- if (ret) {
- dev_err(phy->dev, "phy_reset failed\n");
- return ret;
- }
-
- ulpi_init(motg);
-
- writel(USBCMD_RESET, USB_USBCMD);
- while (cnt < LINK_RESET_TIMEOUT_USEC) {
- if (!(readl(USB_USBCMD) & USBCMD_RESET))
- break;
- udelay(1);
- cnt++;
- }
- if (cnt >= LINK_RESET_TIMEOUT_USEC)
- return -ETIMEDOUT;
-
- /* select ULPI phy */
- writel(0x80000000, USB_PORTSC);
-
- msleep(100);
-
- writel(0x0, USB_AHBBURST);
- writel(0x00, USB_AHBMODE);
-
- if (pdata->otg_control == OTG_PHY_CONTROL) {
- val = readl(USB_OTGSC);
- if (pdata->mode == USB_OTG) {
- ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID;
- val |= OTGSC_IDIE | OTGSC_BSVIE;
- } else if (pdata->mode == USB_PERIPHERAL) {
- ulpi_val = ULPI_INT_SESS_VALID;
- val |= OTGSC_BSVIE;
- }
- writel(val, USB_OTGSC);
- ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_RISE);
- ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_FALL);
- }
-
- return 0;
-}
-
-#define PHY_SUSPEND_TIMEOUT_USEC (500 * 1000)
-#define PHY_RESUME_TIMEOUT_USEC (100 * 1000)
-
-#ifdef CONFIG_PM_SLEEP
-static int msm_otg_suspend(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- struct usb_bus *bus = phy->otg->host;
- struct msm_otg_platform_data *pdata = motg->pdata;
- int cnt = 0;
-
- if (atomic_read(&motg->in_lpm))
- return 0;
-
- disable_irq(motg->irq);
- /*
- * Chipidea 45-nm PHY suspend sequence:
- *
- * Interrupt Latch Register auto-clear feature is not present
- * in all PHY versions. Latch register is clear on read type.
- * Clear latch register to avoid spurious wakeup from
- * low power mode (LPM).
- *
- * PHY comparators are disabled when PHY enters into low power
- * mode (LPM). Keep PHY comparators ON in LPM only when we expect
- * VBUS/Id notifications from USB PHY. Otherwise turn off USB
- * PHY comparators. This save significant amount of power.
- *
- * PLL is not turned off when PHY enters into low power mode (LPM).
- * Disable PLL for maximum power savings.
- */
-
- if (motg->pdata->phy_type == CI_45NM_INTEGRATED_PHY) {
- ulpi_read(phy, 0x14);
- if (pdata->otg_control == OTG_PHY_CONTROL)
- ulpi_write(phy, 0x01, 0x30);
- ulpi_write(phy, 0x08, 0x09);
- }
-
- /*
- * PHY may take some time or even fail to enter into low power
- * mode (LPM). Hence poll for 500 msec and reset the PHY and link
- * in failure case.
- */
- writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC);
- while (cnt < PHY_SUSPEND_TIMEOUT_USEC) {
- if (readl(USB_PORTSC) & PORTSC_PHCD)
- break;
- udelay(1);
- cnt++;
- }
-
- if (cnt >= PHY_SUSPEND_TIMEOUT_USEC) {
- dev_err(phy->dev, "Unable to suspend PHY\n");
- msm_otg_reset(phy);
- enable_irq(motg->irq);
- return -ETIMEDOUT;
- }
-
- /*
- * PHY has capability to generate interrupt asynchronously in low
- * power mode (LPM). This interrupt is level triggered. So USB IRQ
- * line must be disabled till async interrupt enable bit is cleared
- * in USBCMD register. Assert STP (ULPI interface STOP signal) to
- * block data communication from PHY.
- */
- writel(readl(USB_USBCMD) | ASYNC_INTR_CTRL | ULPI_STP_CTRL, USB_USBCMD);
-
- if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
- motg->pdata->otg_control == OTG_PMIC_CONTROL)
- writel(readl(USB_PHY_CTRL) | PHY_RETEN, USB_PHY_CTRL);
-
- clk_disable(motg->pclk);
- clk_disable(motg->clk);
- if (motg->core_clk)
- clk_disable(motg->core_clk);
-
- if (!IS_ERR(motg->pclk_src))
- clk_disable(motg->pclk_src);
-
- if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
- motg->pdata->otg_control == OTG_PMIC_CONTROL) {
- msm_hsusb_ldo_set_mode(0);
- msm_hsusb_config_vddcx(0);
- }
-
- if (device_may_wakeup(phy->dev))
- enable_irq_wake(motg->irq);
- if (bus)
- clear_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
-
- atomic_set(&motg->in_lpm, 1);
- enable_irq(motg->irq);
-
- dev_info(phy->dev, "USB in low power mode\n");
-
- return 0;
-}
-
-static int msm_otg_resume(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- struct usb_bus *bus = phy->otg->host;
- int cnt = 0;
- unsigned temp;
-
- if (!atomic_read(&motg->in_lpm))
- return 0;
-
- if (!IS_ERR(motg->pclk_src))
- clk_enable(motg->pclk_src);
-
- clk_enable(motg->pclk);
- clk_enable(motg->clk);
- if (motg->core_clk)
- clk_enable(motg->core_clk);
-
- if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
- motg->pdata->otg_control == OTG_PMIC_CONTROL) {
- msm_hsusb_ldo_set_mode(1);
- msm_hsusb_config_vddcx(1);
- writel(readl(USB_PHY_CTRL) & ~PHY_RETEN, USB_PHY_CTRL);
- }
-
- temp = readl(USB_USBCMD);
- temp &= ~ASYNC_INTR_CTRL;
- temp &= ~ULPI_STP_CTRL;
- writel(temp, USB_USBCMD);
-
- /*
- * PHY comes out of low power mode (LPM) in case of wakeup
- * from asynchronous interrupt.
- */
- if (!(readl(USB_PORTSC) & PORTSC_PHCD))
- goto skip_phy_resume;
-
- writel(readl(USB_PORTSC) & ~PORTSC_PHCD, USB_PORTSC);
- while (cnt < PHY_RESUME_TIMEOUT_USEC) {
- if (!(readl(USB_PORTSC) & PORTSC_PHCD))
- break;
- udelay(1);
- cnt++;
- }
-
- if (cnt >= PHY_RESUME_TIMEOUT_USEC) {
- /*
- * This is a fatal error. Reset the link and
- * PHY. USB state can not be restored. Re-insertion
- * of USB cable is the only way to get USB working.
- */
- dev_err(phy->dev, "Unable to resume USB."
- "Re-plugin the cable\n");
- msm_otg_reset(phy);
- }
-
-skip_phy_resume:
- if (device_may_wakeup(phy->dev))
- disable_irq_wake(motg->irq);
- if (bus)
- set_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
-
- atomic_set(&motg->in_lpm, 0);
-
- if (motg->async_int) {
- motg->async_int = 0;
- pm_runtime_put(phy->dev);
- enable_irq(motg->irq);
- }
-
- dev_info(phy->dev, "USB exited from low power mode\n");
-
- return 0;
-}
-#endif
-
-static void msm_otg_notify_charger(struct msm_otg *motg, unsigned mA)
-{
- if (motg->cur_power == mA)
- return;
-
- /* TODO: Notify PMIC about available current */
- dev_info(motg->phy.dev, "Avail curr from USB = %u\n", mA);
- motg->cur_power = mA;
-}
-
-static int msm_otg_set_power(struct usb_phy *phy, unsigned mA)
-{
- struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
-
- /*
- * Gadget driver uses set_power method to notify about the
- * available current based on suspend/configured states.
- *
- * IDEV_CHG can be drawn irrespective of suspend/un-configured
- * states when CDP/ACA is connected.
- */
- if (motg->chg_type == USB_SDP_CHARGER)
- msm_otg_notify_charger(motg, mA);
-
- return 0;
-}
-
-static void msm_otg_start_host(struct usb_phy *phy, int on)
-{
- struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
- struct msm_otg_platform_data *pdata = motg->pdata;
- struct usb_hcd *hcd;
-
- if (!phy->otg->host)
- return;
-
- hcd = bus_to_hcd(phy->otg->host);
-
- if (on) {
- dev_dbg(phy->dev, "host on\n");
-
- if (pdata->vbus_power)
- pdata->vbus_power(1);
- /*
- * Some boards have a switch cotrolled by gpio
- * to enable/disable internal HUB. Enable internal
- * HUB before kicking the host.
- */
- if (pdata->setup_gpio)
- pdata->setup_gpio(OTG_STATE_A_HOST);
-#ifdef CONFIG_USB
- usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
-#endif
- } else {
- dev_dbg(phy->dev, "host off\n");
-
-#ifdef CONFIG_USB
- usb_remove_hcd(hcd);
-#endif
- if (pdata->setup_gpio)
- pdata->setup_gpio(OTG_STATE_UNDEFINED);
- if (pdata->vbus_power)
- pdata->vbus_power(0);
- }
-}
-
-static int msm_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct msm_otg *motg = container_of(otg->phy, struct msm_otg, phy);
- struct usb_hcd *hcd;
-
- /*
- * Fail host registration if this board can support
- * only peripheral configuration.
- */
- if (motg->pdata->mode == USB_PERIPHERAL) {
- dev_info(otg->phy->dev, "Host mode is not supported\n");
- return -ENODEV;
- }
-
- if (!host) {
- if (otg->phy->state == OTG_STATE_A_HOST) {
- pm_runtime_get_sync(otg->phy->dev);
- msm_otg_start_host(otg->phy, 0);
- otg->host = NULL;
- otg->phy->state = OTG_STATE_UNDEFINED;
- schedule_work(&motg->sm_work);
- } else {
- otg->host = NULL;
- }
-
- return 0;
- }
-
- hcd = bus_to_hcd(host);
- hcd->power_budget = motg->pdata->power_budget;
-
- otg->host = host;
- dev_dbg(otg->phy->dev, "host driver registered w/ tranceiver\n");
-
- /*
- * Kick the state machine work, if peripheral is not supported
- * or peripheral is already registered with us.
- */
- if (motg->pdata->mode == USB_HOST || otg->gadget) {
- pm_runtime_get_sync(otg->phy->dev);
- schedule_work(&motg->sm_work);
- }
-
- return 0;
-}
-
-static void msm_otg_start_peripheral(struct usb_phy *phy, int on)
-{
- struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
- struct msm_otg_platform_data *pdata = motg->pdata;
-
- if (!phy->otg->gadget)
- return;
-
- if (on) {
- dev_dbg(phy->dev, "gadget on\n");
- /*
- * Some boards have a switch cotrolled by gpio
- * to enable/disable internal HUB. Disable internal
- * HUB before kicking the gadget.
- */
- if (pdata->setup_gpio)
- pdata->setup_gpio(OTG_STATE_B_PERIPHERAL);
- usb_gadget_vbus_connect(phy->otg->gadget);
- } else {
- dev_dbg(phy->dev, "gadget off\n");
- usb_gadget_vbus_disconnect(phy->otg->gadget);
- if (pdata->setup_gpio)
- pdata->setup_gpio(OTG_STATE_UNDEFINED);
- }
-
-}
-
-static int msm_otg_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- struct msm_otg *motg = container_of(otg->phy, struct msm_otg, phy);
-
- /*
- * Fail peripheral registration if this board can support
- * only host configuration.
- */
- if (motg->pdata->mode == USB_HOST) {
- dev_info(otg->phy->dev, "Peripheral mode is not supported\n");
- return -ENODEV;
- }
-
- if (!gadget) {
- if (otg->phy->state == OTG_STATE_B_PERIPHERAL) {
- pm_runtime_get_sync(otg->phy->dev);
- msm_otg_start_peripheral(otg->phy, 0);
- otg->gadget = NULL;
- otg->phy->state = OTG_STATE_UNDEFINED;
- schedule_work(&motg->sm_work);
- } else {
- otg->gadget = NULL;
- }
-
- return 0;
- }
- otg->gadget = gadget;
- dev_dbg(otg->phy->dev, "peripheral driver registered w/ tranceiver\n");
-
- /*
- * Kick the state machine work, if host is not supported
- * or host is already registered with us.
- */
- if (motg->pdata->mode == USB_PERIPHERAL || otg->host) {
- pm_runtime_get_sync(otg->phy->dev);
- schedule_work(&motg->sm_work);
- }
-
- return 0;
-}
-
-static bool msm_chg_check_secondary_det(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 chg_det;
- bool ret = false;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- ret = chg_det & (1 << 4);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x87);
- ret = chg_det & 1;
- break;
- default:
- break;
- }
- return ret;
-}
-
-static void msm_chg_enable_secondary_det(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 chg_det;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- /* Turn off charger block */
- chg_det |= ~(1 << 1);
- ulpi_write(phy, chg_det, 0x34);
- udelay(20);
- /* control chg block via ULPI */
- chg_det &= ~(1 << 3);
- ulpi_write(phy, chg_det, 0x34);
- /* put it in host mode for enabling D- source */
- chg_det &= ~(1 << 2);
- ulpi_write(phy, chg_det, 0x34);
- /* Turn on chg detect block */
- chg_det &= ~(1 << 1);
- ulpi_write(phy, chg_det, 0x34);
- udelay(20);
- /* enable chg detection */
- chg_det &= ~(1 << 0);
- ulpi_write(phy, chg_det, 0x34);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- /*
- * Configure DM as current source, DP as current sink
- * and enable battery charging comparators.
- */
- ulpi_write(phy, 0x8, 0x85);
- ulpi_write(phy, 0x2, 0x85);
- ulpi_write(phy, 0x1, 0x85);
- break;
- default:
- break;
- }
-}
-
-static bool msm_chg_check_primary_det(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 chg_det;
- bool ret = false;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- ret = chg_det & (1 << 4);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x87);
- ret = chg_det & 1;
- break;
- default:
- break;
- }
- return ret;
-}
-
-static void msm_chg_enable_primary_det(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 chg_det;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- /* enable chg detection */
- chg_det &= ~(1 << 0);
- ulpi_write(phy, chg_det, 0x34);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- /*
- * Configure DP as current source, DM as current sink
- * and enable battery charging comparators.
- */
- ulpi_write(phy, 0x2, 0x85);
- ulpi_write(phy, 0x1, 0x85);
- break;
- default:
- break;
- }
-}
-
-static bool msm_chg_check_dcd(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 line_state;
- bool ret = false;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- line_state = ulpi_read(phy, 0x15);
- ret = !(line_state & 1);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- line_state = ulpi_read(phy, 0x87);
- ret = line_state & 2;
- break;
- default:
- break;
- }
- return ret;
-}
-
-static void msm_chg_disable_dcd(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 chg_det;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- chg_det &= ~(1 << 5);
- ulpi_write(phy, chg_det, 0x34);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- ulpi_write(phy, 0x10, 0x86);
- break;
- default:
- break;
- }
-}
-
-static void msm_chg_enable_dcd(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 chg_det;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- /* Turn on D+ current source */
- chg_det |= (1 << 5);
- ulpi_write(phy, chg_det, 0x34);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- /* Data contact detection enable */
- ulpi_write(phy, 0x10, 0x85);
- break;
- default:
- break;
- }
-}
-
-static void msm_chg_block_on(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 func_ctrl, chg_det;
-
- /* put the controller in non-driving mode */
- func_ctrl = ulpi_read(phy, ULPI_FUNC_CTRL);
- func_ctrl &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
- func_ctrl |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
- ulpi_write(phy, func_ctrl, ULPI_FUNC_CTRL);
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- /* control chg block via ULPI */
- chg_det &= ~(1 << 3);
- ulpi_write(phy, chg_det, 0x34);
- /* Turn on chg detect block */
- chg_det &= ~(1 << 1);
- ulpi_write(phy, chg_det, 0x34);
- udelay(20);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- /* Clear charger detecting control bits */
- ulpi_write(phy, 0x3F, 0x86);
- /* Clear alt interrupt latch and enable bits */
- ulpi_write(phy, 0x1F, 0x92);
- ulpi_write(phy, 0x1F, 0x95);
- udelay(100);
- break;
- default:
- break;
- }
-}
-
-static void msm_chg_block_off(struct msm_otg *motg)
-{
- struct usb_phy *phy = &motg->phy;
- u32 func_ctrl, chg_det;
-
- switch (motg->pdata->phy_type) {
- case CI_45NM_INTEGRATED_PHY:
- chg_det = ulpi_read(phy, 0x34);
- /* Turn off charger block */
- chg_det |= ~(1 << 1);
- ulpi_write(phy, chg_det, 0x34);
- break;
- case SNPS_28NM_INTEGRATED_PHY:
- /* Clear charger detecting control bits */
- ulpi_write(phy, 0x3F, 0x86);
- /* Clear alt interrupt latch and enable bits */
- ulpi_write(phy, 0x1F, 0x92);
- ulpi_write(phy, 0x1F, 0x95);
- break;
- default:
- break;
- }
-
- /* put the controller in normal mode */
- func_ctrl = ulpi_read(phy, ULPI_FUNC_CTRL);
- func_ctrl &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
- func_ctrl |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
- ulpi_write(phy, func_ctrl, ULPI_FUNC_CTRL);
-}
-
-#define MSM_CHG_DCD_POLL_TIME (100 * HZ/1000) /* 100 msec */
-#define MSM_CHG_DCD_MAX_RETRIES 6 /* Tdcd_tmout = 6 * 100 msec */
-#define MSM_CHG_PRIMARY_DET_TIME (40 * HZ/1000) /* TVDPSRC_ON */
-#define MSM_CHG_SECONDARY_DET_TIME (40 * HZ/1000) /* TVDMSRC_ON */
-static void msm_chg_detect_work(struct work_struct *w)
-{
- struct msm_otg *motg = container_of(w, struct msm_otg, chg_work.work);
- struct usb_phy *phy = &motg->phy;
- bool is_dcd, tmout, vout;
- unsigned long delay;
-
- dev_dbg(phy->dev, "chg detection work\n");
- switch (motg->chg_state) {
- case USB_CHG_STATE_UNDEFINED:
- pm_runtime_get_sync(phy->dev);
- msm_chg_block_on(motg);
- msm_chg_enable_dcd(motg);
- motg->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
- motg->dcd_retries = 0;
- delay = MSM_CHG_DCD_POLL_TIME;
- break;
- case USB_CHG_STATE_WAIT_FOR_DCD:
- is_dcd = msm_chg_check_dcd(motg);
- tmout = ++motg->dcd_retries == MSM_CHG_DCD_MAX_RETRIES;
- if (is_dcd || tmout) {
- msm_chg_disable_dcd(motg);
- msm_chg_enable_primary_det(motg);
- delay = MSM_CHG_PRIMARY_DET_TIME;
- motg->chg_state = USB_CHG_STATE_DCD_DONE;
- } else {
- delay = MSM_CHG_DCD_POLL_TIME;
- }
- break;
- case USB_CHG_STATE_DCD_DONE:
- vout = msm_chg_check_primary_det(motg);
- if (vout) {
- msm_chg_enable_secondary_det(motg);
- delay = MSM_CHG_SECONDARY_DET_TIME;
- motg->chg_state = USB_CHG_STATE_PRIMARY_DONE;
- } else {
- motg->chg_type = USB_SDP_CHARGER;
- motg->chg_state = USB_CHG_STATE_DETECTED;
- delay = 0;
- }
- break;
- case USB_CHG_STATE_PRIMARY_DONE:
- vout = msm_chg_check_secondary_det(motg);
- if (vout)
- motg->chg_type = USB_DCP_CHARGER;
- else
- motg->chg_type = USB_CDP_CHARGER;
- motg->chg_state = USB_CHG_STATE_SECONDARY_DONE;
- /* fall through */
- case USB_CHG_STATE_SECONDARY_DONE:
- motg->chg_state = USB_CHG_STATE_DETECTED;
- case USB_CHG_STATE_DETECTED:
- msm_chg_block_off(motg);
- dev_dbg(phy->dev, "charger = %d\n", motg->chg_type);
- schedule_work(&motg->sm_work);
- return;
- default:
- return;
- }
-
- schedule_delayed_work(&motg->chg_work, delay);
-}
-
-/*
- * We support OTG, Peripheral only and Host only configurations. In case
- * of OTG, mode switch (host-->peripheral/peripheral-->host) can happen
- * via Id pin status or user request (debugfs). Id/BSV interrupts are not
- * enabled when switch is controlled by user and default mode is supplied
- * by board file, which can be changed by userspace later.
- */
-static void msm_otg_init_sm(struct msm_otg *motg)
-{
- struct msm_otg_platform_data *pdata = motg->pdata;
- u32 otgsc = readl(USB_OTGSC);
-
- switch (pdata->mode) {
- case USB_OTG:
- if (pdata->otg_control == OTG_PHY_CONTROL) {
- if (otgsc & OTGSC_ID)
- set_bit(ID, &motg->inputs);
- else
- clear_bit(ID, &motg->inputs);
-
- if (otgsc & OTGSC_BSV)
- set_bit(B_SESS_VLD, &motg->inputs);
- else
- clear_bit(B_SESS_VLD, &motg->inputs);
- } else if (pdata->otg_control == OTG_USER_CONTROL) {
- if (pdata->default_mode == USB_HOST) {
- clear_bit(ID, &motg->inputs);
- } else if (pdata->default_mode == USB_PERIPHERAL) {
- set_bit(ID, &motg->inputs);
- set_bit(B_SESS_VLD, &motg->inputs);
- } else {
- set_bit(ID, &motg->inputs);
- clear_bit(B_SESS_VLD, &motg->inputs);
- }
- }
- break;
- case USB_HOST:
- clear_bit(ID, &motg->inputs);
- break;
- case USB_PERIPHERAL:
- set_bit(ID, &motg->inputs);
- if (otgsc & OTGSC_BSV)
- set_bit(B_SESS_VLD, &motg->inputs);
- else
- clear_bit(B_SESS_VLD, &motg->inputs);
- break;
- default:
- break;
- }
-}
-
-static void msm_otg_sm_work(struct work_struct *w)
-{
- struct msm_otg *motg = container_of(w, struct msm_otg, sm_work);
- struct usb_otg *otg = motg->phy.otg;
-
- switch (otg->phy->state) {
- case OTG_STATE_UNDEFINED:
- dev_dbg(otg->phy->dev, "OTG_STATE_UNDEFINED state\n");
- msm_otg_reset(otg->phy);
- msm_otg_init_sm(motg);
- otg->phy->state = OTG_STATE_B_IDLE;
- /* FALL THROUGH */
- case OTG_STATE_B_IDLE:
- dev_dbg(otg->phy->dev, "OTG_STATE_B_IDLE state\n");
- if (!test_bit(ID, &motg->inputs) && otg->host) {
- /* disable BSV bit */
- writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC);
- msm_otg_start_host(otg->phy, 1);
- otg->phy->state = OTG_STATE_A_HOST;
- } else if (test_bit(B_SESS_VLD, &motg->inputs)) {
- switch (motg->chg_state) {
- case USB_CHG_STATE_UNDEFINED:
- msm_chg_detect_work(&motg->chg_work.work);
- break;
- case USB_CHG_STATE_DETECTED:
- switch (motg->chg_type) {
- case USB_DCP_CHARGER:
- msm_otg_notify_charger(motg,
- IDEV_CHG_MAX);
- break;
- case USB_CDP_CHARGER:
- msm_otg_notify_charger(motg,
- IDEV_CHG_MAX);
- msm_otg_start_peripheral(otg->phy, 1);
- otg->phy->state
- = OTG_STATE_B_PERIPHERAL;
- break;
- case USB_SDP_CHARGER:
- msm_otg_notify_charger(motg, IUNIT);
- msm_otg_start_peripheral(otg->phy, 1);
- otg->phy->state
- = OTG_STATE_B_PERIPHERAL;
- break;
- default:
- break;
- }
- break;
- default:
- break;
- }
- } else {
- /*
- * If charger detection work is pending, decrement
- * the pm usage counter to balance with the one that
- * is incremented in charger detection work.
- */
- if (cancel_delayed_work_sync(&motg->chg_work)) {
- pm_runtime_put_sync(otg->phy->dev);
- msm_otg_reset(otg->phy);
- }
- msm_otg_notify_charger(motg, 0);
- motg->chg_state = USB_CHG_STATE_UNDEFINED;
- motg->chg_type = USB_INVALID_CHARGER;
- }
- pm_runtime_put_sync(otg->phy->dev);
- break;
- case OTG_STATE_B_PERIPHERAL:
- dev_dbg(otg->phy->dev, "OTG_STATE_B_PERIPHERAL state\n");
- if (!test_bit(B_SESS_VLD, &motg->inputs) ||
- !test_bit(ID, &motg->inputs)) {
- msm_otg_notify_charger(motg, 0);
- msm_otg_start_peripheral(otg->phy, 0);
- motg->chg_state = USB_CHG_STATE_UNDEFINED;
- motg->chg_type = USB_INVALID_CHARGER;
- otg->phy->state = OTG_STATE_B_IDLE;
- msm_otg_reset(otg->phy);
- schedule_work(w);
- }
- break;
- case OTG_STATE_A_HOST:
- dev_dbg(otg->phy->dev, "OTG_STATE_A_HOST state\n");
- if (test_bit(ID, &motg->inputs)) {
- msm_otg_start_host(otg->phy, 0);
- otg->phy->state = OTG_STATE_B_IDLE;
- msm_otg_reset(otg->phy);
- schedule_work(w);
- }
- break;
- default:
- break;
- }
-}
-
-static irqreturn_t msm_otg_irq(int irq, void *data)
-{
- struct msm_otg *motg = data;
- struct usb_phy *phy = &motg->phy;
- u32 otgsc = 0;
-
- if (atomic_read(&motg->in_lpm)) {
- disable_irq_nosync(irq);
- motg->async_int = 1;
- pm_runtime_get(phy->dev);
- return IRQ_HANDLED;
- }
-
- otgsc = readl(USB_OTGSC);
- if (!(otgsc & (OTGSC_IDIS | OTGSC_BSVIS)))
- return IRQ_NONE;
-
- if ((otgsc & OTGSC_IDIS) && (otgsc & OTGSC_IDIE)) {
- if (otgsc & OTGSC_ID)
- set_bit(ID, &motg->inputs);
- else
- clear_bit(ID, &motg->inputs);
- dev_dbg(phy->dev, "ID set/clear\n");
- pm_runtime_get_noresume(phy->dev);
- } else if ((otgsc & OTGSC_BSVIS) && (otgsc & OTGSC_BSVIE)) {
- if (otgsc & OTGSC_BSV)
- set_bit(B_SESS_VLD, &motg->inputs);
- else
- clear_bit(B_SESS_VLD, &motg->inputs);
- dev_dbg(phy->dev, "BSV set/clear\n");
- pm_runtime_get_noresume(phy->dev);
- }
-
- writel(otgsc, USB_OTGSC);
- schedule_work(&motg->sm_work);
- return IRQ_HANDLED;
-}
-
-static int msm_otg_mode_show(struct seq_file *s, void *unused)
-{
- struct msm_otg *motg = s->private;
- struct usb_otg *otg = motg->phy.otg;
-
- switch (otg->phy->state) {
- case OTG_STATE_A_HOST:
- seq_printf(s, "host\n");
- break;
- case OTG_STATE_B_PERIPHERAL:
- seq_printf(s, "peripheral\n");
- break;
- default:
- seq_printf(s, "none\n");
- break;
- }
-
- return 0;
-}
-
-static int msm_otg_mode_open(struct inode *inode, struct file *file)
-{
- return single_open(file, msm_otg_mode_show, inode->i_private);
-}
-
-static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
- size_t count, loff_t *ppos)
-{
- struct seq_file *s = file->private_data;
- struct msm_otg *motg = s->private;
- char buf[16];
- struct usb_otg *otg = motg->phy.otg;
- int status = count;
- enum usb_mode_type req_mode;
-
- memset(buf, 0x00, sizeof(buf));
-
- if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) {
- status = -EFAULT;
- goto out;
- }
-
- if (!strncmp(buf, "host", 4)) {
- req_mode = USB_HOST;
- } else if (!strncmp(buf, "peripheral", 10)) {
- req_mode = USB_PERIPHERAL;
- } else if (!strncmp(buf, "none", 4)) {
- req_mode = USB_NONE;
- } else {
- status = -EINVAL;
- goto out;
- }
-
- switch (req_mode) {
- case USB_NONE:
- switch (otg->phy->state) {
- case OTG_STATE_A_HOST:
- case OTG_STATE_B_PERIPHERAL:
- set_bit(ID, &motg->inputs);
- clear_bit(B_SESS_VLD, &motg->inputs);
- break;
- default:
- goto out;
- }
- break;
- case USB_PERIPHERAL:
- switch (otg->phy->state) {
- case OTG_STATE_B_IDLE:
- case OTG_STATE_A_HOST:
- set_bit(ID, &motg->inputs);
- set_bit(B_SESS_VLD, &motg->inputs);
- break;
- default:
- goto out;
- }
- break;
- case USB_HOST:
- switch (otg->phy->state) {
- case OTG_STATE_B_IDLE:
- case OTG_STATE_B_PERIPHERAL:
- clear_bit(ID, &motg->inputs);
- break;
- default:
- goto out;
- }
- break;
- default:
- goto out;
- }
-
- pm_runtime_get_sync(otg->phy->dev);
- schedule_work(&motg->sm_work);
-out:
- return status;
-}
-
-const struct file_operations msm_otg_mode_fops = {
- .open = msm_otg_mode_open,
- .read = seq_read,
- .write = msm_otg_mode_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static struct dentry *msm_otg_dbg_root;
-static struct dentry *msm_otg_dbg_mode;
-
-static int msm_otg_debugfs_init(struct msm_otg *motg)
-{
- msm_otg_dbg_root = debugfs_create_dir("msm_otg", NULL);
-
- if (!msm_otg_dbg_root || IS_ERR(msm_otg_dbg_root))
- return -ENODEV;
-
- msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO | S_IWUSR,
- msm_otg_dbg_root, motg, &msm_otg_mode_fops);
- if (!msm_otg_dbg_mode) {
- debugfs_remove(msm_otg_dbg_root);
- msm_otg_dbg_root = NULL;
- return -ENODEV;
- }
-
- return 0;
-}
-
-static void msm_otg_debugfs_cleanup(void)
-{
- debugfs_remove(msm_otg_dbg_mode);
- debugfs_remove(msm_otg_dbg_root);
-}
-
-static int __init msm_otg_probe(struct platform_device *pdev)
-{
- int ret = 0;
- struct resource *res;
- struct msm_otg *motg;
- struct usb_phy *phy;
-
- dev_info(&pdev->dev, "msm_otg probe\n");
- if (!pdev->dev.platform_data) {
- dev_err(&pdev->dev, "No platform data given. Bailing out\n");
- return -ENODEV;
- }
-
- motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL);
- if (!motg) {
- dev_err(&pdev->dev, "unable to allocate msm_otg\n");
- return -ENOMEM;
- }
-
- motg->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
- if (!motg->phy.otg) {
- dev_err(&pdev->dev, "unable to allocate msm_otg\n");
- return -ENOMEM;
- }
-
- motg->pdata = pdev->dev.platform_data;
- phy = &motg->phy;
- phy->dev = &pdev->dev;
-
- motg->phy_reset_clk = clk_get(&pdev->dev, "usb_phy_clk");
- if (IS_ERR(motg->phy_reset_clk)) {
- dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
- ret = PTR_ERR(motg->phy_reset_clk);
- goto free_motg;
- }
-
- motg->clk = clk_get(&pdev->dev, "usb_hs_clk");
- if (IS_ERR(motg->clk)) {
- dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
- ret = PTR_ERR(motg->clk);
- goto put_phy_reset_clk;
- }
- clk_set_rate(motg->clk, 60000000);
-
- /*
- * If USB Core is running its protocol engine based on CORE CLK,
- * CORE CLK must be running at >55Mhz for correct HSUSB
- * operation and USB core cannot tolerate frequency changes on
- * CORE CLK. For such USB cores, vote for maximum clk frequency
- * on pclk source
- */
- if (motg->pdata->pclk_src_name) {
- motg->pclk_src = clk_get(&pdev->dev,
- motg->pdata->pclk_src_name);
- if (IS_ERR(motg->pclk_src))
- goto put_clk;
- clk_set_rate(motg->pclk_src, INT_MAX);
- clk_enable(motg->pclk_src);
- } else
- motg->pclk_src = ERR_PTR(-ENOENT);
-
-
- motg->pclk = clk_get(&pdev->dev, "usb_hs_pclk");
- if (IS_ERR(motg->pclk)) {
- dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
- ret = PTR_ERR(motg->pclk);
- goto put_pclk_src;
- }
-
- /*
- * USB core clock is not present on all MSM chips. This
- * clock is introduced to remove the dependency on AXI
- * bus frequency.
- */
- motg->core_clk = clk_get(&pdev->dev, "usb_hs_core_clk");
- if (IS_ERR(motg->core_clk))
- motg->core_clk = NULL;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "failed to get platform resource mem\n");
- ret = -ENODEV;
- goto put_core_clk;
- }
-
- motg->regs = ioremap(res->start, resource_size(res));
- if (!motg->regs) {
- dev_err(&pdev->dev, "ioremap failed\n");
- ret = -ENOMEM;
- goto put_core_clk;
- }
- dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
-
- motg->irq = platform_get_irq(pdev, 0);
- if (!motg->irq) {
- dev_err(&pdev->dev, "platform_get_irq failed\n");
- ret = -ENODEV;
- goto free_regs;
- }
-
- clk_enable(motg->clk);
- clk_enable(motg->pclk);
-
- ret = msm_hsusb_init_vddcx(motg, 1);
- if (ret) {
- dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
- goto free_regs;
- }
-
- ret = msm_hsusb_ldo_init(motg, 1);
- if (ret) {
- dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
- goto vddcx_exit;
- }
- ret = msm_hsusb_ldo_set_mode(1);
- if (ret) {
- dev_err(&pdev->dev, "hsusb vreg enable failed\n");
- goto ldo_exit;
- }
-
- if (motg->core_clk)
- clk_enable(motg->core_clk);
-
- writel(0, USB_USBINTR);
- writel(0, USB_OTGSC);
-
- INIT_WORK(&motg->sm_work, msm_otg_sm_work);
- INIT_DELAYED_WORK(&motg->chg_work, msm_chg_detect_work);
- ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED,
- "msm_otg", motg);
- if (ret) {
- dev_err(&pdev->dev, "request irq failed\n");
- goto disable_clks;
- }
-
- phy->init = msm_otg_reset;
- phy->set_power = msm_otg_set_power;
-
- phy->io_ops = &msm_otg_io_ops;
-
- phy->otg->phy = &motg->phy;
- phy->otg->set_host = msm_otg_set_host;
- phy->otg->set_peripheral = msm_otg_set_peripheral;
-
- ret = usb_add_phy(&motg->phy, USB_PHY_TYPE_USB2);
- if (ret) {
- dev_err(&pdev->dev, "usb_add_phy failed\n");
- goto free_irq;
- }
-
- platform_set_drvdata(pdev, motg);
- device_init_wakeup(&pdev->dev, 1);
-
- if (motg->pdata->mode == USB_OTG &&
- motg->pdata->otg_control == OTG_USER_CONTROL) {
- ret = msm_otg_debugfs_init(motg);
- if (ret)
- dev_dbg(&pdev->dev, "mode debugfs file is"
- "not available\n");
- }
-
- pm_runtime_set_active(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
-
- return 0;
-free_irq:
- free_irq(motg->irq, motg);
-disable_clks:
- clk_disable(motg->pclk);
- clk_disable(motg->clk);
-ldo_exit:
- msm_hsusb_ldo_init(motg, 0);
-vddcx_exit:
- msm_hsusb_init_vddcx(motg, 0);
-free_regs:
- iounmap(motg->regs);
-put_core_clk:
- if (motg->core_clk)
- clk_put(motg->core_clk);
- clk_put(motg->pclk);
-put_pclk_src:
- if (!IS_ERR(motg->pclk_src)) {
- clk_disable(motg->pclk_src);
- clk_put(motg->pclk_src);
- }
-put_clk:
- clk_put(motg->clk);
-put_phy_reset_clk:
- clk_put(motg->phy_reset_clk);
-free_motg:
- kfree(motg->phy.otg);
- kfree(motg);
- return ret;
-}
-
-static int msm_otg_remove(struct platform_device *pdev)
-{
- struct msm_otg *motg = platform_get_drvdata(pdev);
- struct usb_phy *phy = &motg->phy;
- int cnt = 0;
-
- if (phy->otg->host || phy->otg->gadget)
- return -EBUSY;
-
- msm_otg_debugfs_cleanup();
- cancel_delayed_work_sync(&motg->chg_work);
- cancel_work_sync(&motg->sm_work);
-
- pm_runtime_resume(&pdev->dev);
-
- device_init_wakeup(&pdev->dev, 0);
- pm_runtime_disable(&pdev->dev);
-
- usb_remove_phy(phy);
- free_irq(motg->irq, motg);
-
- /*
- * Put PHY in low power mode.
- */
- ulpi_read(phy, 0x14);
- ulpi_write(phy, 0x08, 0x09);
-
- writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC);
- while (cnt < PHY_SUSPEND_TIMEOUT_USEC) {
- if (readl(USB_PORTSC) & PORTSC_PHCD)
- break;
- udelay(1);
- cnt++;
- }
- if (cnt >= PHY_SUSPEND_TIMEOUT_USEC)
- dev_err(phy->dev, "Unable to suspend PHY\n");
-
- clk_disable(motg->pclk);
- clk_disable(motg->clk);
- if (motg->core_clk)
- clk_disable(motg->core_clk);
- if (!IS_ERR(motg->pclk_src)) {
- clk_disable(motg->pclk_src);
- clk_put(motg->pclk_src);
- }
- msm_hsusb_ldo_init(motg, 0);
-
- iounmap(motg->regs);
- pm_runtime_set_suspended(&pdev->dev);
-
- clk_put(motg->phy_reset_clk);
- clk_put(motg->pclk);
- clk_put(motg->clk);
- if (motg->core_clk)
- clk_put(motg->core_clk);
-
- kfree(motg->phy.otg);
- kfree(motg);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_RUNTIME
-static int msm_otg_runtime_idle(struct device *dev)
-{
- struct msm_otg *motg = dev_get_drvdata(dev);
- struct usb_otg *otg = motg->phy.otg;
-
- dev_dbg(dev, "OTG runtime idle\n");
-
- /*
- * It is observed some times that a spurious interrupt
- * comes when PHY is put into LPM immediately after PHY reset.
- * This 1 sec delay also prevents entering into LPM immediately
- * after asynchronous interrupt.
- */
- if (otg->phy->state != OTG_STATE_UNDEFINED)
- pm_schedule_suspend(dev, 1000);
-
- return -EAGAIN;
-}
-
-static int msm_otg_runtime_suspend(struct device *dev)
-{
- struct msm_otg *motg = dev_get_drvdata(dev);
-
- dev_dbg(dev, "OTG runtime suspend\n");
- return msm_otg_suspend(motg);
-}
-
-static int msm_otg_runtime_resume(struct device *dev)
-{
- struct msm_otg *motg = dev_get_drvdata(dev);
-
- dev_dbg(dev, "OTG runtime resume\n");
- return msm_otg_resume(motg);
-}
-#endif
-
-#ifdef CONFIG_PM_SLEEP
-static int msm_otg_pm_suspend(struct device *dev)
-{
- struct msm_otg *motg = dev_get_drvdata(dev);
-
- dev_dbg(dev, "OTG PM suspend\n");
- return msm_otg_suspend(motg);
-}
-
-static int msm_otg_pm_resume(struct device *dev)
-{
- struct msm_otg *motg = dev_get_drvdata(dev);
- int ret;
-
- dev_dbg(dev, "OTG PM resume\n");
-
- ret = msm_otg_resume(motg);
- if (ret)
- return ret;
-
- /*
- * Runtime PM Documentation recommends bringing the
- * device to full powered state upon resume.
- */
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-static const struct dev_pm_ops msm_otg_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(msm_otg_pm_suspend, msm_otg_pm_resume)
- SET_RUNTIME_PM_OPS(msm_otg_runtime_suspend, msm_otg_runtime_resume,
- msm_otg_runtime_idle)
-};
-#endif
-
-static struct platform_driver msm_otg_driver = {
- .remove = msm_otg_remove,
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
-#ifdef CONFIG_PM
- .pm = &msm_otg_dev_pm_ops,
-#endif
- },
-};
-
-module_platform_driver_probe(msm_otg_driver, msm_otg_probe);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MSM USB transceiver driver");
+++ /dev/null
-/*
- * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
- * Author: Chao Xie <chao.xie@marvell.com>
- * Neil Zhang <zhangwm@marvell.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-#include <linux/device.h>
-#include <linux/proc_fs.h>
-#include <linux/clk.h>
-#include <linux/workqueue.h>
-#include <linux/platform_device.h>
-
-#include <linux/usb.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/hcd.h>
-#include <linux/platform_data/mv_usb.h>
-
-#include "mv_otg.h"
-
-#define DRIVER_DESC "Marvell USB OTG transceiver driver"
-#define DRIVER_VERSION "Jan 20, 2010"
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_VERSION(DRIVER_VERSION);
-MODULE_LICENSE("GPL");
-
-static const char driver_name[] = "mv-otg";
-
-static char *state_string[] = {
- "undefined",
- "b_idle",
- "b_srp_init",
- "b_peripheral",
- "b_wait_acon",
- "b_host",
- "a_idle",
- "a_wait_vrise",
- "a_wait_bcon",
- "a_host",
- "a_suspend",
- "a_peripheral",
- "a_wait_vfall",
- "a_vbus_err"
-};
-
-static int mv_otg_set_vbus(struct usb_otg *otg, bool on)
-{
- struct mv_otg *mvotg = container_of(otg->phy, struct mv_otg, phy);
- if (mvotg->pdata->set_vbus == NULL)
- return -ENODEV;
-
- return mvotg->pdata->set_vbus(on);
-}
-
-static int mv_otg_set_host(struct usb_otg *otg,
- struct usb_bus *host)
-{
- otg->host = host;
-
- return 0;
-}
-
-static int mv_otg_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- otg->gadget = gadget;
-
- return 0;
-}
-
-static void mv_otg_run_state_machine(struct mv_otg *mvotg,
- unsigned long delay)
-{
- dev_dbg(&mvotg->pdev->dev, "transceiver is updated\n");
- if (!mvotg->qwork)
- return;
-
- queue_delayed_work(mvotg->qwork, &mvotg->work, delay);
-}
-
-static void mv_otg_timer_await_bcon(unsigned long data)
-{
- struct mv_otg *mvotg = (struct mv_otg *) data;
-
- mvotg->otg_ctrl.a_wait_bcon_timeout = 1;
-
- dev_info(&mvotg->pdev->dev, "B Device No Response!\n");
-
- if (spin_trylock(&mvotg->wq_lock)) {
- mv_otg_run_state_machine(mvotg, 0);
- spin_unlock(&mvotg->wq_lock);
- }
-}
-
-static int mv_otg_cancel_timer(struct mv_otg *mvotg, unsigned int id)
-{
- struct timer_list *timer;
-
- if (id >= OTG_TIMER_NUM)
- return -EINVAL;
-
- timer = &mvotg->otg_ctrl.timer[id];
-
- if (timer_pending(timer))
- del_timer(timer);
-
- return 0;
-}
-
-static int mv_otg_set_timer(struct mv_otg *mvotg, unsigned int id,
- unsigned long interval,
- void (*callback) (unsigned long))
-{
- struct timer_list *timer;
-
- if (id >= OTG_TIMER_NUM)
- return -EINVAL;
-
- timer = &mvotg->otg_ctrl.timer[id];
- if (timer_pending(timer)) {
- dev_err(&mvotg->pdev->dev, "Timer%d is already running\n", id);
- return -EBUSY;
- }
-
- init_timer(timer);
- timer->data = (unsigned long) mvotg;
- timer->function = callback;
- timer->expires = jiffies + interval;
- add_timer(timer);
-
- return 0;
-}
-
-static int mv_otg_reset(struct mv_otg *mvotg)
-{
- unsigned int loops;
- u32 tmp;
-
- /* Stop the controller */
- tmp = readl(&mvotg->op_regs->usbcmd);
- tmp &= ~USBCMD_RUN_STOP;
- writel(tmp, &mvotg->op_regs->usbcmd);
-
- /* Reset the controller to get default values */
- writel(USBCMD_CTRL_RESET, &mvotg->op_regs->usbcmd);
-
- loops = 500;
- while (readl(&mvotg->op_regs->usbcmd) & USBCMD_CTRL_RESET) {
- if (loops == 0) {
- dev_err(&mvotg->pdev->dev,
- "Wait for RESET completed TIMEOUT\n");
- return -ETIMEDOUT;
- }
- loops--;
- udelay(20);
- }
-
- writel(0x0, &mvotg->op_regs->usbintr);
- tmp = readl(&mvotg->op_regs->usbsts);
- writel(tmp, &mvotg->op_regs->usbsts);
-
- return 0;
-}
-
-static void mv_otg_init_irq(struct mv_otg *mvotg)
-{
- u32 otgsc;
-
- mvotg->irq_en = OTGSC_INTR_A_SESSION_VALID
- | OTGSC_INTR_A_VBUS_VALID;
- mvotg->irq_status = OTGSC_INTSTS_A_SESSION_VALID
- | OTGSC_INTSTS_A_VBUS_VALID;
-
- if (mvotg->pdata->vbus == NULL) {
- mvotg->irq_en |= OTGSC_INTR_B_SESSION_VALID
- | OTGSC_INTR_B_SESSION_END;
- mvotg->irq_status |= OTGSC_INTSTS_B_SESSION_VALID
- | OTGSC_INTSTS_B_SESSION_END;
- }
-
- if (mvotg->pdata->id == NULL) {
- mvotg->irq_en |= OTGSC_INTR_USB_ID;
- mvotg->irq_status |= OTGSC_INTSTS_USB_ID;
- }
-
- otgsc = readl(&mvotg->op_regs->otgsc);
- otgsc |= mvotg->irq_en;
- writel(otgsc, &mvotg->op_regs->otgsc);
-}
-
-static void mv_otg_start_host(struct mv_otg *mvotg, int on)
-{
-#ifdef CONFIG_USB
- struct usb_otg *otg = mvotg->phy.otg;
- struct usb_hcd *hcd;
-
- if (!otg->host)
- return;
-
- dev_info(&mvotg->pdev->dev, "%s host\n", on ? "start" : "stop");
-
- hcd = bus_to_hcd(otg->host);
-
- if (on)
- usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
- else
- usb_remove_hcd(hcd);
-#endif /* CONFIG_USB */
-}
-
-static void mv_otg_start_periphrals(struct mv_otg *mvotg, int on)
-{
- struct usb_otg *otg = mvotg->phy.otg;
-
- if (!otg->gadget)
- return;
-
- dev_info(mvotg->phy.dev, "gadget %s\n", on ? "on" : "off");
-
- if (on)
- usb_gadget_vbus_connect(otg->gadget);
- else
- usb_gadget_vbus_disconnect(otg->gadget);
-}
-
-static void otg_clock_enable(struct mv_otg *mvotg)
-{
- unsigned int i;
-
- for (i = 0; i < mvotg->clknum; i++)
- clk_prepare_enable(mvotg->clk[i]);
-}
-
-static void otg_clock_disable(struct mv_otg *mvotg)
-{
- unsigned int i;
-
- for (i = 0; i < mvotg->clknum; i++)
- clk_disable_unprepare(mvotg->clk[i]);
-}
-
-static int mv_otg_enable_internal(struct mv_otg *mvotg)
-{
- int retval = 0;
-
- if (mvotg->active)
- return 0;
-
- dev_dbg(&mvotg->pdev->dev, "otg enabled\n");
-
- otg_clock_enable(mvotg);
- if (mvotg->pdata->phy_init) {
- retval = mvotg->pdata->phy_init(mvotg->phy_regs);
- if (retval) {
- dev_err(&mvotg->pdev->dev,
- "init phy error %d\n", retval);
- otg_clock_disable(mvotg);
- return retval;
- }
- }
- mvotg->active = 1;
-
- return 0;
-
-}
-
-static int mv_otg_enable(struct mv_otg *mvotg)
-{
- if (mvotg->clock_gating)
- return mv_otg_enable_internal(mvotg);
-
- return 0;
-}
-
-static void mv_otg_disable_internal(struct mv_otg *mvotg)
-{
- if (mvotg->active) {
- dev_dbg(&mvotg->pdev->dev, "otg disabled\n");
- if (mvotg->pdata->phy_deinit)
- mvotg->pdata->phy_deinit(mvotg->phy_regs);
- otg_clock_disable(mvotg);
- mvotg->active = 0;
- }
-}
-
-static void mv_otg_disable(struct mv_otg *mvotg)
-{
- if (mvotg->clock_gating)
- mv_otg_disable_internal(mvotg);
-}
-
-static void mv_otg_update_inputs(struct mv_otg *mvotg)
-{
- struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
- u32 otgsc;
-
- otgsc = readl(&mvotg->op_regs->otgsc);
-
- if (mvotg->pdata->vbus) {
- if (mvotg->pdata->vbus->poll() == VBUS_HIGH) {
- otg_ctrl->b_sess_vld = 1;
- otg_ctrl->b_sess_end = 0;
- } else {
- otg_ctrl->b_sess_vld = 0;
- otg_ctrl->b_sess_end = 1;
- }
- } else {
- otg_ctrl->b_sess_vld = !!(otgsc & OTGSC_STS_B_SESSION_VALID);
- otg_ctrl->b_sess_end = !!(otgsc & OTGSC_STS_B_SESSION_END);
- }
-
- if (mvotg->pdata->id)
- otg_ctrl->id = !!mvotg->pdata->id->poll();
- else
- otg_ctrl->id = !!(otgsc & OTGSC_STS_USB_ID);
-
- if (mvotg->pdata->otg_force_a_bus_req && !otg_ctrl->id)
- otg_ctrl->a_bus_req = 1;
-
- otg_ctrl->a_sess_vld = !!(otgsc & OTGSC_STS_A_SESSION_VALID);
- otg_ctrl->a_vbus_vld = !!(otgsc & OTGSC_STS_A_VBUS_VALID);
-
- dev_dbg(&mvotg->pdev->dev, "%s: ", __func__);
- dev_dbg(&mvotg->pdev->dev, "id %d\n", otg_ctrl->id);
- dev_dbg(&mvotg->pdev->dev, "b_sess_vld %d\n", otg_ctrl->b_sess_vld);
- dev_dbg(&mvotg->pdev->dev, "b_sess_end %d\n", otg_ctrl->b_sess_end);
- dev_dbg(&mvotg->pdev->dev, "a_vbus_vld %d\n", otg_ctrl->a_vbus_vld);
- dev_dbg(&mvotg->pdev->dev, "a_sess_vld %d\n", otg_ctrl->a_sess_vld);
-}
-
-static void mv_otg_update_state(struct mv_otg *mvotg)
-{
- struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
- struct usb_phy *phy = &mvotg->phy;
- int old_state = phy->state;
-
- switch (old_state) {
- case OTG_STATE_UNDEFINED:
- phy->state = OTG_STATE_B_IDLE;
- /* FALL THROUGH */
- case OTG_STATE_B_IDLE:
- if (otg_ctrl->id == 0)
- phy->state = OTG_STATE_A_IDLE;
- else if (otg_ctrl->b_sess_vld)
- phy->state = OTG_STATE_B_PERIPHERAL;
- break;
- case OTG_STATE_B_PERIPHERAL:
- if (!otg_ctrl->b_sess_vld || otg_ctrl->id == 0)
- phy->state = OTG_STATE_B_IDLE;
- break;
- case OTG_STATE_A_IDLE:
- if (otg_ctrl->id)
- phy->state = OTG_STATE_B_IDLE;
- else if (!(otg_ctrl->a_bus_drop) &&
- (otg_ctrl->a_bus_req || otg_ctrl->a_srp_det))
- phy->state = OTG_STATE_A_WAIT_VRISE;
- break;
- case OTG_STATE_A_WAIT_VRISE:
- if (otg_ctrl->a_vbus_vld)
- phy->state = OTG_STATE_A_WAIT_BCON;
- break;
- case OTG_STATE_A_WAIT_BCON:
- if (otg_ctrl->id || otg_ctrl->a_bus_drop
- || otg_ctrl->a_wait_bcon_timeout) {
- mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
- mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
- phy->state = OTG_STATE_A_WAIT_VFALL;
- otg_ctrl->a_bus_req = 0;
- } else if (!otg_ctrl->a_vbus_vld) {
- mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
- mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
- phy->state = OTG_STATE_A_VBUS_ERR;
- } else if (otg_ctrl->b_conn) {
- mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
- mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
- phy->state = OTG_STATE_A_HOST;
- }
- break;
- case OTG_STATE_A_HOST:
- if (otg_ctrl->id || !otg_ctrl->b_conn
- || otg_ctrl->a_bus_drop)
- phy->state = OTG_STATE_A_WAIT_BCON;
- else if (!otg_ctrl->a_vbus_vld)
- phy->state = OTG_STATE_A_VBUS_ERR;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- if (otg_ctrl->id
- || (!otg_ctrl->b_conn && otg_ctrl->a_sess_vld)
- || otg_ctrl->a_bus_req)
- phy->state = OTG_STATE_A_IDLE;
- break;
- case OTG_STATE_A_VBUS_ERR:
- if (otg_ctrl->id || otg_ctrl->a_clr_err
- || otg_ctrl->a_bus_drop) {
- otg_ctrl->a_clr_err = 0;
- phy->state = OTG_STATE_A_WAIT_VFALL;
- }
- break;
- default:
- break;
- }
-}
-
-static void mv_otg_work(struct work_struct *work)
-{
- struct mv_otg *mvotg;
- struct usb_phy *phy;
- struct usb_otg *otg;
- int old_state;
-
- mvotg = container_of(to_delayed_work(work), struct mv_otg, work);
-
-run:
- /* work queue is single thread, or we need spin_lock to protect */
- phy = &mvotg->phy;
- otg = phy->otg;
- old_state = phy->state;
-
- if (!mvotg->active)
- return;
-
- mv_otg_update_inputs(mvotg);
- mv_otg_update_state(mvotg);
-
- if (old_state != phy->state) {
- dev_info(&mvotg->pdev->dev, "change from state %s to %s\n",
- state_string[old_state],
- state_string[phy->state]);
-
- switch (phy->state) {
- case OTG_STATE_B_IDLE:
- otg->default_a = 0;
- if (old_state == OTG_STATE_B_PERIPHERAL)
- mv_otg_start_periphrals(mvotg, 0);
- mv_otg_reset(mvotg);
- mv_otg_disable(mvotg);
- break;
- case OTG_STATE_B_PERIPHERAL:
- mv_otg_enable(mvotg);
- mv_otg_start_periphrals(mvotg, 1);
- break;
- case OTG_STATE_A_IDLE:
- otg->default_a = 1;
- mv_otg_enable(mvotg);
- if (old_state == OTG_STATE_A_WAIT_VFALL)
- mv_otg_start_host(mvotg, 0);
- mv_otg_reset(mvotg);
- break;
- case OTG_STATE_A_WAIT_VRISE:
- mv_otg_set_vbus(otg, 1);
- break;
- case OTG_STATE_A_WAIT_BCON:
- if (old_state != OTG_STATE_A_HOST)
- mv_otg_start_host(mvotg, 1);
- mv_otg_set_timer(mvotg, A_WAIT_BCON_TIMER,
- T_A_WAIT_BCON,
- mv_otg_timer_await_bcon);
- /*
- * Now, we directly enter A_HOST. So set b_conn = 1
- * here. In fact, it need host driver to notify us.
- */
- mvotg->otg_ctrl.b_conn = 1;
- break;
- case OTG_STATE_A_HOST:
- break;
- case OTG_STATE_A_WAIT_VFALL:
- /*
- * Now, we has exited A_HOST. So set b_conn = 0
- * here. In fact, it need host driver to notify us.
- */
- mvotg->otg_ctrl.b_conn = 0;
- mv_otg_set_vbus(otg, 0);
- break;
- case OTG_STATE_A_VBUS_ERR:
- break;
- default:
- break;
- }
- goto run;
- }
-}
-
-static irqreturn_t mv_otg_irq(int irq, void *dev)
-{
- struct mv_otg *mvotg = dev;
- u32 otgsc;
-
- otgsc = readl(&mvotg->op_regs->otgsc);
- writel(otgsc, &mvotg->op_regs->otgsc);
-
- /*
- * if we have vbus, then the vbus detection for B-device
- * will be done by mv_otg_inputs_irq().
- */
- if (mvotg->pdata->vbus)
- if ((otgsc & OTGSC_STS_USB_ID) &&
- !(otgsc & OTGSC_INTSTS_USB_ID))
- return IRQ_NONE;
-
- if ((otgsc & mvotg->irq_status) == 0)
- return IRQ_NONE;
-
- mv_otg_run_state_machine(mvotg, 0);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t mv_otg_inputs_irq(int irq, void *dev)
-{
- struct mv_otg *mvotg = dev;
-
- /* The clock may disabled at this time */
- if (!mvotg->active) {
- mv_otg_enable(mvotg);
- mv_otg_init_irq(mvotg);
- }
-
- mv_otg_run_state_machine(mvotg, 0);
-
- return IRQ_HANDLED;
-}
-
-static ssize_t
-get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct mv_otg *mvotg = dev_get_drvdata(dev);
- return scnprintf(buf, PAGE_SIZE, "%d\n",
- mvotg->otg_ctrl.a_bus_req);
-}
-
-static ssize_t
-set_a_bus_req(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct mv_otg *mvotg = dev_get_drvdata(dev);
-
- if (count > 2)
- return -1;
-
- /* We will use this interface to change to A device */
- if (mvotg->phy.state != OTG_STATE_B_IDLE
- && mvotg->phy.state != OTG_STATE_A_IDLE)
- return -1;
-
- /* The clock may disabled and we need to set irq for ID detected */
- mv_otg_enable(mvotg);
- mv_otg_init_irq(mvotg);
-
- if (buf[0] == '1') {
- mvotg->otg_ctrl.a_bus_req = 1;
- mvotg->otg_ctrl.a_bus_drop = 0;
- dev_dbg(&mvotg->pdev->dev,
- "User request: a_bus_req = 1\n");
-
- if (spin_trylock(&mvotg->wq_lock)) {
- mv_otg_run_state_machine(mvotg, 0);
- spin_unlock(&mvotg->wq_lock);
- }
- }
-
- return count;
-}
-
-static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUSR, get_a_bus_req,
- set_a_bus_req);
-
-static ssize_t
-set_a_clr_err(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct mv_otg *mvotg = dev_get_drvdata(dev);
- if (!mvotg->phy.otg->default_a)
- return -1;
-
- if (count > 2)
- return -1;
-
- if (buf[0] == '1') {
- mvotg->otg_ctrl.a_clr_err = 1;
- dev_dbg(&mvotg->pdev->dev,
- "User request: a_clr_err = 1\n");
- }
-
- if (spin_trylock(&mvotg->wq_lock)) {
- mv_otg_run_state_machine(mvotg, 0);
- spin_unlock(&mvotg->wq_lock);
- }
-
- return count;
-}
-
-static DEVICE_ATTR(a_clr_err, S_IWUSR, NULL, set_a_clr_err);
-
-static ssize_t
-get_a_bus_drop(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct mv_otg *mvotg = dev_get_drvdata(dev);
- return scnprintf(buf, PAGE_SIZE, "%d\n",
- mvotg->otg_ctrl.a_bus_drop);
-}
-
-static ssize_t
-set_a_bus_drop(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct mv_otg *mvotg = dev_get_drvdata(dev);
- if (!mvotg->phy.otg->default_a)
- return -1;
-
- if (count > 2)
- return -1;
-
- if (buf[0] == '0') {
- mvotg->otg_ctrl.a_bus_drop = 0;
- dev_dbg(&mvotg->pdev->dev,
- "User request: a_bus_drop = 0\n");
- } else if (buf[0] == '1') {
- mvotg->otg_ctrl.a_bus_drop = 1;
- mvotg->otg_ctrl.a_bus_req = 0;
- dev_dbg(&mvotg->pdev->dev,
- "User request: a_bus_drop = 1\n");
- dev_dbg(&mvotg->pdev->dev,
- "User request: and a_bus_req = 0\n");
- }
-
- if (spin_trylock(&mvotg->wq_lock)) {
- mv_otg_run_state_machine(mvotg, 0);
- spin_unlock(&mvotg->wq_lock);
- }
-
- return count;
-}
-
-static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUSR,
- get_a_bus_drop, set_a_bus_drop);
-
-static struct attribute *inputs_attrs[] = {
- &dev_attr_a_bus_req.attr,
- &dev_attr_a_clr_err.attr,
- &dev_attr_a_bus_drop.attr,
- NULL,
-};
-
-static struct attribute_group inputs_attr_group = {
- .name = "inputs",
- .attrs = inputs_attrs,
-};
-
-int mv_otg_remove(struct platform_device *pdev)
-{
- struct mv_otg *mvotg = platform_get_drvdata(pdev);
-
- sysfs_remove_group(&mvotg->pdev->dev.kobj, &inputs_attr_group);
-
- if (mvotg->qwork) {
- flush_workqueue(mvotg->qwork);
- destroy_workqueue(mvotg->qwork);
- }
-
- mv_otg_disable(mvotg);
-
- usb_remove_phy(&mvotg->phy);
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static int mv_otg_probe(struct platform_device *pdev)
-{
- struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
- struct mv_otg *mvotg;
- struct usb_otg *otg;
- struct resource *r;
- int retval = 0, clk_i, i;
- size_t size;
-
- if (pdata == NULL) {
- dev_err(&pdev->dev, "failed to get platform data\n");
- return -ENODEV;
- }
-
- size = sizeof(*mvotg) + sizeof(struct clk *) * pdata->clknum;
- mvotg = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
- if (!mvotg) {
- dev_err(&pdev->dev, "failed to allocate memory!\n");
- return -ENOMEM;
- }
-
- otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
- if (!otg)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, mvotg);
-
- mvotg->pdev = pdev;
- mvotg->pdata = pdata;
-
- mvotg->clknum = pdata->clknum;
- for (clk_i = 0; clk_i < mvotg->clknum; clk_i++) {
- mvotg->clk[clk_i] = devm_clk_get(&pdev->dev,
- pdata->clkname[clk_i]);
- if (IS_ERR(mvotg->clk[clk_i])) {
- retval = PTR_ERR(mvotg->clk[clk_i]);
- return retval;
- }
- }
-
- mvotg->qwork = create_singlethread_workqueue("mv_otg_queue");
- if (!mvotg->qwork) {
- dev_dbg(&pdev->dev, "cannot create workqueue for OTG\n");
- return -ENOMEM;
- }
-
- INIT_DELAYED_WORK(&mvotg->work, mv_otg_work);
-
- /* OTG common part */
- mvotg->pdev = pdev;
- mvotg->phy.dev = &pdev->dev;
- mvotg->phy.otg = otg;
- mvotg->phy.label = driver_name;
- mvotg->phy.state = OTG_STATE_UNDEFINED;
-
- otg->phy = &mvotg->phy;
- otg->set_host = mv_otg_set_host;
- otg->set_peripheral = mv_otg_set_peripheral;
- otg->set_vbus = mv_otg_set_vbus;
-
- for (i = 0; i < OTG_TIMER_NUM; i++)
- init_timer(&mvotg->otg_ctrl.timer[i]);
-
- r = platform_get_resource_byname(mvotg->pdev,
- IORESOURCE_MEM, "phyregs");
- if (r == NULL) {
- dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
- retval = -ENODEV;
- goto err_destroy_workqueue;
- }
-
- mvotg->phy_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
- if (mvotg->phy_regs == NULL) {
- dev_err(&pdev->dev, "failed to map phy I/O memory\n");
- retval = -EFAULT;
- goto err_destroy_workqueue;
- }
-
- r = platform_get_resource_byname(mvotg->pdev,
- IORESOURCE_MEM, "capregs");
- if (r == NULL) {
- dev_err(&pdev->dev, "no I/O memory resource defined\n");
- retval = -ENODEV;
- goto err_destroy_workqueue;
- }
-
- mvotg->cap_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
- if (mvotg->cap_regs == NULL) {
- dev_err(&pdev->dev, "failed to map I/O memory\n");
- retval = -EFAULT;
- goto err_destroy_workqueue;
- }
-
- /* we will acces controller register, so enable the udc controller */
- retval = mv_otg_enable_internal(mvotg);
- if (retval) {
- dev_err(&pdev->dev, "mv otg enable error %d\n", retval);
- goto err_destroy_workqueue;
- }
-
- mvotg->op_regs =
- (struct mv_otg_regs __iomem *) ((unsigned long) mvotg->cap_regs
- + (readl(mvotg->cap_regs) & CAPLENGTH_MASK));
-
- if (pdata->id) {
- retval = devm_request_threaded_irq(&pdev->dev, pdata->id->irq,
- NULL, mv_otg_inputs_irq,
- IRQF_ONESHOT, "id", mvotg);
- if (retval) {
- dev_info(&pdev->dev,
- "Failed to request irq for ID\n");
- pdata->id = NULL;
- }
- }
-
- if (pdata->vbus) {
- mvotg->clock_gating = 1;
- retval = devm_request_threaded_irq(&pdev->dev, pdata->vbus->irq,
- NULL, mv_otg_inputs_irq,
- IRQF_ONESHOT, "vbus", mvotg);
- if (retval) {
- dev_info(&pdev->dev,
- "Failed to request irq for VBUS, "
- "disable clock gating\n");
- mvotg->clock_gating = 0;
- pdata->vbus = NULL;
- }
- }
-
- if (pdata->disable_otg_clock_gating)
- mvotg->clock_gating = 0;
-
- mv_otg_reset(mvotg);
- mv_otg_init_irq(mvotg);
-
- r = platform_get_resource(mvotg->pdev, IORESOURCE_IRQ, 0);
- if (r == NULL) {
- dev_err(&pdev->dev, "no IRQ resource defined\n");
- retval = -ENODEV;
- goto err_disable_clk;
- }
-
- mvotg->irq = r->start;
- if (devm_request_irq(&pdev->dev, mvotg->irq, mv_otg_irq, IRQF_SHARED,
- driver_name, mvotg)) {
- dev_err(&pdev->dev, "Request irq %d for OTG failed\n",
- mvotg->irq);
- mvotg->irq = 0;
- retval = -ENODEV;
- goto err_disable_clk;
- }
-
- retval = usb_add_phy(&mvotg->phy, USB_PHY_TYPE_USB2);
- if (retval < 0) {
- dev_err(&pdev->dev, "can't register transceiver, %d\n",
- retval);
- goto err_disable_clk;
- }
-
- retval = sysfs_create_group(&pdev->dev.kobj, &inputs_attr_group);
- if (retval < 0) {
- dev_dbg(&pdev->dev,
- "Can't register sysfs attr group: %d\n", retval);
- goto err_remove_phy;
- }
-
- spin_lock_init(&mvotg->wq_lock);
- if (spin_trylock(&mvotg->wq_lock)) {
- mv_otg_run_state_machine(mvotg, 2 * HZ);
- spin_unlock(&mvotg->wq_lock);
- }
-
- dev_info(&pdev->dev,
- "successful probe OTG device %s clock gating.\n",
- mvotg->clock_gating ? "with" : "without");
-
- return 0;
-
-err_remove_phy:
- usb_remove_phy(&mvotg->phy);
-err_disable_clk:
- mv_otg_disable_internal(mvotg);
-err_destroy_workqueue:
- flush_workqueue(mvotg->qwork);
- destroy_workqueue(mvotg->qwork);
-
- platform_set_drvdata(pdev, NULL);
-
- return retval;
-}
-
-#ifdef CONFIG_PM
-static int mv_otg_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct mv_otg *mvotg = platform_get_drvdata(pdev);
-
- if (mvotg->phy.state != OTG_STATE_B_IDLE) {
- dev_info(&pdev->dev,
- "OTG state is not B_IDLE, it is %d!\n",
- mvotg->phy.state);
- return -EAGAIN;
- }
-
- if (!mvotg->clock_gating)
- mv_otg_disable_internal(mvotg);
-
- return 0;
-}
-
-static int mv_otg_resume(struct platform_device *pdev)
-{
- struct mv_otg *mvotg = platform_get_drvdata(pdev);
- u32 otgsc;
-
- if (!mvotg->clock_gating) {
- mv_otg_enable_internal(mvotg);
-
- otgsc = readl(&mvotg->op_regs->otgsc);
- otgsc |= mvotg->irq_en;
- writel(otgsc, &mvotg->op_regs->otgsc);
-
- if (spin_trylock(&mvotg->wq_lock)) {
- mv_otg_run_state_machine(mvotg, 0);
- spin_unlock(&mvotg->wq_lock);
- }
- }
- return 0;
-}
-#endif
-
-static struct platform_driver mv_otg_driver = {
- .probe = mv_otg_probe,
- .remove = __exit_p(mv_otg_remove),
- .driver = {
- .owner = THIS_MODULE,
- .name = driver_name,
- },
-#ifdef CONFIG_PM
- .suspend = mv_otg_suspend,
- .resume = mv_otg_resume,
-#endif
-};
-module_platform_driver(mv_otg_driver);
+++ /dev/null
-/*
- * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#ifndef __MV_USB_OTG_CONTROLLER__
-#define __MV_USB_OTG_CONTROLLER__
-
-#include <linux/types.h>
-
-/* Command Register Bit Masks */
-#define USBCMD_RUN_STOP (0x00000001)
-#define USBCMD_CTRL_RESET (0x00000002)
-
-/* otgsc Register Bit Masks */
-#define OTGSC_CTRL_VUSB_DISCHARGE 0x00000001
-#define OTGSC_CTRL_VUSB_CHARGE 0x00000002
-#define OTGSC_CTRL_OTG_TERM 0x00000008
-#define OTGSC_CTRL_DATA_PULSING 0x00000010
-#define OTGSC_STS_USB_ID 0x00000100
-#define OTGSC_STS_A_VBUS_VALID 0x00000200
-#define OTGSC_STS_A_SESSION_VALID 0x00000400
-#define OTGSC_STS_B_SESSION_VALID 0x00000800
-#define OTGSC_STS_B_SESSION_END 0x00001000
-#define OTGSC_STS_1MS_TOGGLE 0x00002000
-#define OTGSC_STS_DATA_PULSING 0x00004000
-#define OTGSC_INTSTS_USB_ID 0x00010000
-#define OTGSC_INTSTS_A_VBUS_VALID 0x00020000
-#define OTGSC_INTSTS_A_SESSION_VALID 0x00040000
-#define OTGSC_INTSTS_B_SESSION_VALID 0x00080000
-#define OTGSC_INTSTS_B_SESSION_END 0x00100000
-#define OTGSC_INTSTS_1MS 0x00200000
-#define OTGSC_INTSTS_DATA_PULSING 0x00400000
-#define OTGSC_INTR_USB_ID 0x01000000
-#define OTGSC_INTR_A_VBUS_VALID 0x02000000
-#define OTGSC_INTR_A_SESSION_VALID 0x04000000
-#define OTGSC_INTR_B_SESSION_VALID 0x08000000
-#define OTGSC_INTR_B_SESSION_END 0x10000000
-#define OTGSC_INTR_1MS_TIMER 0x20000000
-#define OTGSC_INTR_DATA_PULSING 0x40000000
-
-#define CAPLENGTH_MASK (0xff)
-
-/* Timer's interval, unit 10ms */
-#define T_A_WAIT_VRISE 100
-#define T_A_WAIT_BCON 2000
-#define T_A_AIDL_BDIS 100
-#define T_A_BIDL_ADIS 20
-#define T_B_ASE0_BRST 400
-#define T_B_SE0_SRP 300
-#define T_B_SRP_FAIL 2000
-#define T_B_DATA_PLS 10
-#define T_B_SRP_INIT 100
-#define T_A_SRP_RSPNS 10
-#define T_A_DRV_RSM 5
-
-enum otg_function {
- OTG_B_DEVICE = 0,
- OTG_A_DEVICE
-};
-
-enum mv_otg_timer {
- A_WAIT_BCON_TIMER = 0,
- OTG_TIMER_NUM
-};
-
-/* PXA OTG state machine */
-struct mv_otg_ctrl {
- /* internal variables */
- u8 a_set_b_hnp_en; /* A-Device set b_hnp_en */
- u8 b_srp_done;
- u8 b_hnp_en;
-
- /* OTG inputs */
- u8 a_bus_drop;
- u8 a_bus_req;
- u8 a_clr_err;
- u8 a_bus_resume;
- u8 a_bus_suspend;
- u8 a_conn;
- u8 a_sess_vld;
- u8 a_srp_det;
- u8 a_vbus_vld;
- u8 b_bus_req; /* B-Device Require Bus */
- u8 b_bus_resume;
- u8 b_bus_suspend;
- u8 b_conn;
- u8 b_se0_srp;
- u8 b_sess_end;
- u8 b_sess_vld;
- u8 id;
- u8 a_suspend_req;
-
- /*Timer event */
- u8 a_aidl_bdis_timeout;
- u8 b_ase0_brst_timeout;
- u8 a_bidl_adis_timeout;
- u8 a_wait_bcon_timeout;
-
- struct timer_list timer[OTG_TIMER_NUM];
-};
-
-#define VUSBHS_MAX_PORTS 8
-
-struct mv_otg_regs {
- u32 usbcmd; /* Command register */
- u32 usbsts; /* Status register */
- u32 usbintr; /* Interrupt enable */
- u32 frindex; /* Frame index */
- u32 reserved1[1];
- u32 deviceaddr; /* Device Address */
- u32 eplistaddr; /* Endpoint List Address */
- u32 ttctrl; /* HOST TT status and control */
- u32 burstsize; /* Programmable Burst Size */
- u32 txfilltuning; /* Host Transmit Pre-Buffer Packet Tuning */
- u32 reserved[4];
- u32 epnak; /* Endpoint NAK */
- u32 epnaken; /* Endpoint NAK Enable */
- u32 configflag; /* Configured Flag register */
- u32 portsc[VUSBHS_MAX_PORTS]; /* Port Status/Control x, x = 1..8 */
- u32 otgsc;
- u32 usbmode; /* USB Host/Device mode */
- u32 epsetupstat; /* Endpoint Setup Status */
- u32 epprime; /* Endpoint Initialize */
- u32 epflush; /* Endpoint De-initialize */
- u32 epstatus; /* Endpoint Status */
- u32 epcomplete; /* Endpoint Interrupt On Complete */
- u32 epctrlx[16]; /* Endpoint Control, where x = 0.. 15 */
- u32 mcr; /* Mux Control */
- u32 isr; /* Interrupt Status */
- u32 ier; /* Interrupt Enable */
-};
-
-struct mv_otg {
- struct usb_phy phy;
- struct mv_otg_ctrl otg_ctrl;
-
- /* base address */
- void __iomem *phy_regs;
- void __iomem *cap_regs;
- struct mv_otg_regs __iomem *op_regs;
-
- struct platform_device *pdev;
- int irq;
- u32 irq_status;
- u32 irq_en;
-
- struct delayed_work work;
- struct workqueue_struct *qwork;
-
- spinlock_t wq_lock;
-
- struct mv_usb_platform_data *pdata;
-
- unsigned int active;
- unsigned int clock_gating;
- unsigned int clknum;
- struct clk *clk[0];
-};
-
-#endif
+++ /dev/null
-/*
- * Copyright 2012 Freescale Semiconductor, Inc.
- * Copyright (C) 2012 Marek Vasut <marex@denx.de>
- * on behalf of DENX Software Engineering GmbH
- *
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/usb/otg.h>
-#include <linux/stmp_device.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/io.h>
-
-#define DRIVER_NAME "mxs_phy"
-
-#define HW_USBPHY_PWD 0x00
-#define HW_USBPHY_CTRL 0x30
-#define HW_USBPHY_CTRL_SET 0x34
-#define HW_USBPHY_CTRL_CLR 0x38
-
-#define BM_USBPHY_CTRL_SFTRST BIT(31)
-#define BM_USBPHY_CTRL_CLKGATE BIT(30)
-#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15)
-#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
-#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
-
-struct mxs_phy {
- struct usb_phy phy;
- struct clk *clk;
-};
-
-#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
-
-static void mxs_phy_hw_init(struct mxs_phy *mxs_phy)
-{
- void __iomem *base = mxs_phy->phy.io_priv;
-
- stmp_reset_block(base + HW_USBPHY_CTRL);
-
- /* Power up the PHY */
- writel(0, base + HW_USBPHY_PWD);
-
- /* enable FS/LS device */
- writel(BM_USBPHY_CTRL_ENUTMILEVEL2 |
- BM_USBPHY_CTRL_ENUTMILEVEL3,
- base + HW_USBPHY_CTRL_SET);
-}
-
-static int mxs_phy_init(struct usb_phy *phy)
-{
- struct mxs_phy *mxs_phy = to_mxs_phy(phy);
-
- clk_prepare_enable(mxs_phy->clk);
- mxs_phy_hw_init(mxs_phy);
-
- return 0;
-}
-
-static void mxs_phy_shutdown(struct usb_phy *phy)
-{
- struct mxs_phy *mxs_phy = to_mxs_phy(phy);
-
- writel(BM_USBPHY_CTRL_CLKGATE,
- phy->io_priv + HW_USBPHY_CTRL_SET);
-
- clk_disable_unprepare(mxs_phy->clk);
-}
-
-static int mxs_phy_suspend(struct usb_phy *x, int suspend)
-{
- struct mxs_phy *mxs_phy = to_mxs_phy(x);
-
- if (suspend) {
- writel(0xffffffff, x->io_priv + HW_USBPHY_PWD);
- writel(BM_USBPHY_CTRL_CLKGATE,
- x->io_priv + HW_USBPHY_CTRL_SET);
- clk_disable_unprepare(mxs_phy->clk);
- } else {
- clk_prepare_enable(mxs_phy->clk);
- writel(BM_USBPHY_CTRL_CLKGATE,
- x->io_priv + HW_USBPHY_CTRL_CLR);
- writel(0, x->io_priv + HW_USBPHY_PWD);
- }
-
- return 0;
-}
-
-static int mxs_phy_on_connect(struct usb_phy *phy,
- enum usb_device_speed speed)
-{
- dev_dbg(phy->dev, "%s speed device has connected\n",
- (speed == USB_SPEED_HIGH) ? "high" : "non-high");
-
- if (speed == USB_SPEED_HIGH)
- writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
- phy->io_priv + HW_USBPHY_CTRL_SET);
-
- return 0;
-}
-
-static int mxs_phy_on_disconnect(struct usb_phy *phy,
- enum usb_device_speed speed)
-{
- dev_dbg(phy->dev, "%s speed device has disconnected\n",
- (speed == USB_SPEED_HIGH) ? "high" : "non-high");
-
- if (speed == USB_SPEED_HIGH)
- writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
- phy->io_priv + HW_USBPHY_CTRL_CLR);
-
- return 0;
-}
-
-static int mxs_phy_probe(struct platform_device *pdev)
-{
- struct resource *res;
- void __iomem *base;
- struct clk *clk;
- struct mxs_phy *mxs_phy;
- int ret;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "can't get device resources\n");
- return -ENOENT;
- }
-
- base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(clk)) {
- dev_err(&pdev->dev,
- "can't get the clock, err=%ld", PTR_ERR(clk));
- return PTR_ERR(clk);
- }
-
- mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL);
- if (!mxs_phy) {
- dev_err(&pdev->dev, "Failed to allocate USB PHY structure!\n");
- return -ENOMEM;
- }
-
- mxs_phy->phy.io_priv = base;
- mxs_phy->phy.dev = &pdev->dev;
- mxs_phy->phy.label = DRIVER_NAME;
- mxs_phy->phy.init = mxs_phy_init;
- mxs_phy->phy.shutdown = mxs_phy_shutdown;
- mxs_phy->phy.set_suspend = mxs_phy_suspend;
- mxs_phy->phy.notify_connect = mxs_phy_on_connect;
- mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect;
-
- ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier);
-
- mxs_phy->clk = clk;
-
- platform_set_drvdata(pdev, &mxs_phy->phy);
-
- ret = usb_add_phy_dev(&mxs_phy->phy);
- if (ret)
- return ret;
-
- return 0;
-}
-
-static int mxs_phy_remove(struct platform_device *pdev)
-{
- struct mxs_phy *mxs_phy = platform_get_drvdata(pdev);
-
- usb_remove_phy(&mxs_phy->phy);
-
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id mxs_phy_dt_ids[] = {
- { .compatible = "fsl,imx23-usbphy", },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
-
-static struct platform_driver mxs_phy_driver = {
- .probe = mxs_phy_probe,
- .remove = mxs_phy_remove,
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
- .of_match_table = mxs_phy_dt_ids,
- },
-};
-
-static int __init mxs_phy_module_init(void)
-{
- return platform_driver_register(&mxs_phy_driver);
-}
-postcore_initcall(mxs_phy_module_init);
-
-static void __exit mxs_phy_module_exit(void)
-{
- platform_driver_unregister(&mxs_phy_driver);
-}
-module_exit(mxs_phy_module_exit);
-
-MODULE_ALIAS("platform:mxs-usb-phy");
-MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
-MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
-MODULE_DESCRIPTION("Freescale MXS USB PHY driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * drivers/usb/otg/nop-usb-xceiv.c
- *
- * NOP USB transceiver for all USB transceiver which are either built-in
- * into USB IP or which are mostly autonomous.
- *
- * Copyright (C) 2009 Texas Instruments Inc
- * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Current status:
- * This provides a "nop" transceiver for PHYs which are
- * autonomous such as isp1504, isp1707, etc.
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/nop-usb-xceiv.h>
-#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/regulator/consumer.h>
-#include <linux/of.h>
-
-struct nop_usb_xceiv {
- struct usb_phy phy;
- struct device *dev;
- struct clk *clk;
- struct regulator *vcc;
- struct regulator *reset;
-};
-
-static struct platform_device *pd;
-
-void usb_nop_xceiv_register(void)
-{
- if (pd)
- return;
- pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
- if (!pd) {
- printk(KERN_ERR "Unable to register usb nop transceiver\n");
- return;
- }
-}
-EXPORT_SYMBOL(usb_nop_xceiv_register);
-
-void usb_nop_xceiv_unregister(void)
-{
- platform_device_unregister(pd);
- pd = NULL;
-}
-EXPORT_SYMBOL(usb_nop_xceiv_unregister);
-
-static int nop_set_suspend(struct usb_phy *x, int suspend)
-{
- return 0;
-}
-
-static int nop_init(struct usb_phy *phy)
-{
- struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
-
- if (!IS_ERR(nop->vcc)) {
- if (regulator_enable(nop->vcc))
- dev_err(phy->dev, "Failed to enable power\n");
- }
-
- if (!IS_ERR(nop->clk))
- clk_enable(nop->clk);
-
- if (!IS_ERR(nop->reset)) {
- /* De-assert RESET */
- if (regulator_enable(nop->reset))
- dev_err(phy->dev, "Failed to de-assert reset\n");
- }
-
- return 0;
-}
-
-static void nop_shutdown(struct usb_phy *phy)
-{
- struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
-
- if (!IS_ERR(nop->reset)) {
- /* Assert RESET */
- if (regulator_disable(nop->reset))
- dev_err(phy->dev, "Failed to assert reset\n");
- }
-
- if (!IS_ERR(nop->clk))
- clk_disable(nop->clk);
-
- if (!IS_ERR(nop->vcc)) {
- if (regulator_disable(nop->vcc))
- dev_err(phy->dev, "Failed to disable power\n");
- }
-}
-
-static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
-{
- if (!otg)
- return -ENODEV;
-
- if (!gadget) {
- otg->gadget = NULL;
- return -ENODEV;
- }
-
- otg->gadget = gadget;
- otg->phy->state = OTG_STATE_B_IDLE;
- return 0;
-}
-
-static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- if (!otg)
- return -ENODEV;
-
- if (!host) {
- otg->host = NULL;
- return -ENODEV;
- }
-
- otg->host = host;
- return 0;
-}
-
-static int nop_usb_xceiv_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct nop_usb_xceiv_platform_data *pdata = pdev->dev.platform_data;
- struct nop_usb_xceiv *nop;
- enum usb_phy_type type = USB_PHY_TYPE_USB2;
- int err;
- u32 clk_rate = 0;
- bool needs_vcc = false;
- bool needs_reset = false;
-
- nop = devm_kzalloc(&pdev->dev, sizeof(*nop), GFP_KERNEL);
- if (!nop)
- return -ENOMEM;
-
- nop->phy.otg = devm_kzalloc(&pdev->dev, sizeof(*nop->phy.otg),
- GFP_KERNEL);
- if (!nop->phy.otg)
- return -ENOMEM;
-
- if (dev->of_node) {
- struct device_node *node = dev->of_node;
-
- if (of_property_read_u32(node, "clock-frequency", &clk_rate))
- clk_rate = 0;
-
- needs_vcc = of_property_read_bool(node, "vcc-supply");
- needs_reset = of_property_read_bool(node, "reset-supply");
-
- } else if (pdata) {
- type = pdata->type;
- clk_rate = pdata->clk_rate;
- needs_vcc = pdata->needs_vcc;
- needs_reset = pdata->needs_reset;
- }
-
- nop->clk = devm_clk_get(&pdev->dev, "main_clk");
- if (IS_ERR(nop->clk)) {
- dev_dbg(&pdev->dev, "Can't get phy clock: %ld\n",
- PTR_ERR(nop->clk));
- }
-
- if (!IS_ERR(nop->clk) && clk_rate) {
- err = clk_set_rate(nop->clk, clk_rate);
- if (err) {
- dev_err(&pdev->dev, "Error setting clock rate\n");
- return err;
- }
- }
-
- if (!IS_ERR(nop->clk)) {
- err = clk_prepare(nop->clk);
- if (err) {
- dev_err(&pdev->dev, "Error preparing clock\n");
- return err;
- }
- }
-
- nop->vcc = devm_regulator_get(&pdev->dev, "vcc");
- if (IS_ERR(nop->vcc)) {
- dev_dbg(&pdev->dev, "Error getting vcc regulator: %ld\n",
- PTR_ERR(nop->vcc));
- if (needs_vcc)
- return -EPROBE_DEFER;
- }
-
- nop->reset = devm_regulator_get(&pdev->dev, "reset");
- if (IS_ERR(nop->reset)) {
- dev_dbg(&pdev->dev, "Error getting reset regulator: %ld\n",
- PTR_ERR(nop->reset));
- if (needs_reset)
- return -EPROBE_DEFER;
- }
-
- nop->dev = &pdev->dev;
- nop->phy.dev = nop->dev;
- nop->phy.label = "nop-xceiv";
- nop->phy.set_suspend = nop_set_suspend;
- nop->phy.init = nop_init;
- nop->phy.shutdown = nop_shutdown;
- nop->phy.state = OTG_STATE_UNDEFINED;
- nop->phy.type = type;
-
- nop->phy.otg->phy = &nop->phy;
- nop->phy.otg->set_host = nop_set_host;
- nop->phy.otg->set_peripheral = nop_set_peripheral;
-
- err = usb_add_phy_dev(&nop->phy);
- if (err) {
- dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
- err);
- goto err_add;
- }
-
- platform_set_drvdata(pdev, nop);
-
- ATOMIC_INIT_NOTIFIER_HEAD(&nop->phy.notifier);
-
- return 0;
-
-err_add:
- if (!IS_ERR(nop->clk))
- clk_unprepare(nop->clk);
- return err;
-}
-
-static int nop_usb_xceiv_remove(struct platform_device *pdev)
-{
- struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
-
- if (!IS_ERR(nop->clk))
- clk_unprepare(nop->clk);
-
- usb_remove_phy(&nop->phy);
-
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id nop_xceiv_dt_ids[] = {
- { .compatible = "usb-nop-xceiv" },
- { }
-};
-
-MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids);
-
-static struct platform_driver nop_usb_xceiv_driver = {
- .probe = nop_usb_xceiv_probe,
- .remove = nop_usb_xceiv_remove,
- .driver = {
- .name = "nop_usb_xceiv",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(nop_xceiv_dt_ids),
- },
-};
-
-static int __init nop_usb_xceiv_init(void)
-{
- return platform_driver_register(&nop_usb_xceiv_driver);
-}
-subsys_initcall(nop_usb_xceiv_init);
-
-static void __exit nop_usb_xceiv_exit(void)
-{
- platform_driver_unregister(&nop_usb_xceiv_driver);
-}
-module_exit(nop_usb_xceiv_exit);
-
-MODULE_ALIAS("platform:nop_usb_xceiv");
-MODULE_AUTHOR("Texas Instruments Inc");
-MODULE_DESCRIPTION("NOP USB Transceiver driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * OTG Finite State Machine from OTG spec
- *
- * Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
- *
- * Author: Li Yang <LeoLi@freescale.com>
- * Jerry Huang <Chang-Ming.Huang@freescale.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-#include <linux/usb.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/otg.h>
-
-#include "otg_fsm.h"
-
-/* Change USB protocol when there is a protocol change */
-static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
-{
- int ret = 0;
-
- if (fsm->protocol != protocol) {
- VDBG("Changing role fsm->protocol= %d; new protocol= %d\n",
- fsm->protocol, protocol);
- /* stop old protocol */
- if (fsm->protocol == PROTO_HOST)
- ret = fsm->ops->start_host(fsm, 0);
- else if (fsm->protocol == PROTO_GADGET)
- ret = fsm->ops->start_gadget(fsm, 0);
- if (ret)
- return ret;
-
- /* start new protocol */
- if (protocol == PROTO_HOST)
- ret = fsm->ops->start_host(fsm, 1);
- else if (protocol == PROTO_GADGET)
- ret = fsm->ops->start_gadget(fsm, 1);
- if (ret)
- return ret;
-
- fsm->protocol = protocol;
- return 0;
- }
-
- return 0;
-}
-
-static int state_changed;
-
-/* Called when leaving a state. Do state clean up jobs here */
-void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
-{
- switch (old_state) {
- case OTG_STATE_B_IDLE:
- otg_del_timer(fsm, b_se0_srp_tmr);
- fsm->b_se0_srp = 0;
- break;
- case OTG_STATE_B_SRP_INIT:
- fsm->b_srp_done = 0;
- break;
- case OTG_STATE_B_PERIPHERAL:
- break;
- case OTG_STATE_B_WAIT_ACON:
- otg_del_timer(fsm, b_ase0_brst_tmr);
- fsm->b_ase0_brst_tmout = 0;
- break;
- case OTG_STATE_B_HOST:
- break;
- case OTG_STATE_A_IDLE:
- break;
- case OTG_STATE_A_WAIT_VRISE:
- otg_del_timer(fsm, a_wait_vrise_tmr);
- fsm->a_wait_vrise_tmout = 0;
- break;
- case OTG_STATE_A_WAIT_BCON:
- otg_del_timer(fsm, a_wait_bcon_tmr);
- fsm->a_wait_bcon_tmout = 0;
- break;
- case OTG_STATE_A_HOST:
- otg_del_timer(fsm, a_wait_enum_tmr);
- break;
- case OTG_STATE_A_SUSPEND:
- otg_del_timer(fsm, a_aidl_bdis_tmr);
- fsm->a_aidl_bdis_tmout = 0;
- fsm->a_suspend_req = 0;
- break;
- case OTG_STATE_A_PERIPHERAL:
- break;
- case OTG_STATE_A_WAIT_VFALL:
- otg_del_timer(fsm, a_wait_vrise_tmr);
- break;
- case OTG_STATE_A_VBUS_ERR:
- break;
- default:
- break;
- }
-}
-
-/* Called when entering a state */
-int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
-{
- state_changed = 1;
- if (fsm->otg->phy->state == new_state)
- return 0;
- VDBG("Set state: %s\n", usb_otg_state_string(new_state));
- otg_leave_state(fsm, fsm->otg->phy->state);
- switch (new_state) {
- case OTG_STATE_B_IDLE:
- otg_drv_vbus(fsm, 0);
- otg_chrg_vbus(fsm, 0);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_UNDEF);
- otg_add_timer(fsm, b_se0_srp_tmr);
- break;
- case OTG_STATE_B_SRP_INIT:
- otg_start_pulse(fsm);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_UNDEF);
- otg_add_timer(fsm, b_srp_fail_tmr);
- break;
- case OTG_STATE_B_PERIPHERAL:
- otg_chrg_vbus(fsm, 0);
- otg_loc_conn(fsm, 1);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_GADGET);
- break;
- case OTG_STATE_B_WAIT_ACON:
- otg_chrg_vbus(fsm, 0);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_HOST);
- otg_add_timer(fsm, b_ase0_brst_tmr);
- fsm->a_bus_suspend = 0;
- break;
- case OTG_STATE_B_HOST:
- otg_chrg_vbus(fsm, 0);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 1);
- otg_set_protocol(fsm, PROTO_HOST);
- usb_bus_start_enum(fsm->otg->host,
- fsm->otg->host->otg_port);
- break;
- case OTG_STATE_A_IDLE:
- otg_drv_vbus(fsm, 0);
- otg_chrg_vbus(fsm, 0);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_HOST);
- break;
- case OTG_STATE_A_WAIT_VRISE:
- otg_drv_vbus(fsm, 1);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_HOST);
- otg_add_timer(fsm, a_wait_vrise_tmr);
- break;
- case OTG_STATE_A_WAIT_BCON:
- otg_drv_vbus(fsm, 1);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_HOST);
- otg_add_timer(fsm, a_wait_bcon_tmr);
- break;
- case OTG_STATE_A_HOST:
- otg_drv_vbus(fsm, 1);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 1);
- otg_set_protocol(fsm, PROTO_HOST);
- /*
- * When HNP is triggered while a_bus_req = 0, a_host will
- * suspend too fast to complete a_set_b_hnp_en
- */
- if (!fsm->a_bus_req || fsm->a_suspend_req)
- otg_add_timer(fsm, a_wait_enum_tmr);
- break;
- case OTG_STATE_A_SUSPEND:
- otg_drv_vbus(fsm, 1);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_HOST);
- otg_add_timer(fsm, a_aidl_bdis_tmr);
-
- break;
- case OTG_STATE_A_PERIPHERAL:
- otg_loc_conn(fsm, 1);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_GADGET);
- otg_drv_vbus(fsm, 1);
- break;
- case OTG_STATE_A_WAIT_VFALL:
- otg_drv_vbus(fsm, 0);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_HOST);
- break;
- case OTG_STATE_A_VBUS_ERR:
- otg_drv_vbus(fsm, 0);
- otg_loc_conn(fsm, 0);
- otg_loc_sof(fsm, 0);
- otg_set_protocol(fsm, PROTO_UNDEF);
- break;
- default:
- break;
- }
-
- fsm->otg->phy->state = new_state;
- return 0;
-}
-
-/* State change judgement */
-int otg_statemachine(struct otg_fsm *fsm)
-{
- enum usb_otg_state state;
- unsigned long flags;
-
- spin_lock_irqsave(&fsm->lock, flags);
-
- state = fsm->otg->phy->state;
- state_changed = 0;
- /* State machine state change judgement */
-
- switch (state) {
- case OTG_STATE_UNDEFINED:
- VDBG("fsm->id = %d\n", fsm->id);
- if (fsm->id)
- otg_set_state(fsm, OTG_STATE_B_IDLE);
- else
- otg_set_state(fsm, OTG_STATE_A_IDLE);
- break;
- case OTG_STATE_B_IDLE:
- if (!fsm->id)
- otg_set_state(fsm, OTG_STATE_A_IDLE);
- else if (fsm->b_sess_vld && fsm->otg->gadget)
- otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
- else if (fsm->b_bus_req && fsm->b_sess_end && fsm->b_se0_srp)
- otg_set_state(fsm, OTG_STATE_B_SRP_INIT);
- break;
- case OTG_STATE_B_SRP_INIT:
- if (!fsm->id || fsm->b_srp_done)
- otg_set_state(fsm, OTG_STATE_B_IDLE);
- break;
- case OTG_STATE_B_PERIPHERAL:
- if (!fsm->id || !fsm->b_sess_vld)
- otg_set_state(fsm, OTG_STATE_B_IDLE);
- else if (fsm->b_bus_req && fsm->otg->
- gadget->b_hnp_enable && fsm->a_bus_suspend)
- otg_set_state(fsm, OTG_STATE_B_WAIT_ACON);
- break;
- case OTG_STATE_B_WAIT_ACON:
- if (fsm->a_conn)
- otg_set_state(fsm, OTG_STATE_B_HOST);
- else if (!fsm->id || !fsm->b_sess_vld)
- otg_set_state(fsm, OTG_STATE_B_IDLE);
- else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) {
- fsm->b_ase0_brst_tmout = 0;
- otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
- }
- break;
- case OTG_STATE_B_HOST:
- if (!fsm->id || !fsm->b_sess_vld)
- otg_set_state(fsm, OTG_STATE_B_IDLE);
- else if (!fsm->b_bus_req || !fsm->a_conn)
- otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
- break;
- case OTG_STATE_A_IDLE:
- if (fsm->id)
- otg_set_state(fsm, OTG_STATE_B_IDLE);
- else if (!fsm->a_bus_drop && (fsm->a_bus_req || fsm->a_srp_det))
- otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE);
- break;
- case OTG_STATE_A_WAIT_VRISE:
- if (fsm->id || fsm->a_bus_drop || fsm->a_vbus_vld ||
- fsm->a_wait_vrise_tmout) {
- otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
- }
- break;
- case OTG_STATE_A_WAIT_BCON:
- if (!fsm->a_vbus_vld)
- otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
- else if (fsm->b_conn)
- otg_set_state(fsm, OTG_STATE_A_HOST);
- else if (fsm->id | fsm->a_bus_drop | fsm->a_wait_bcon_tmout)
- otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
- break;
- case OTG_STATE_A_HOST:
- if ((!fsm->a_bus_req || fsm->a_suspend_req) &&
- fsm->otg->host->b_hnp_enable)
- otg_set_state(fsm, OTG_STATE_A_SUSPEND);
- else if (fsm->id || !fsm->b_conn || fsm->a_bus_drop)
- otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
- else if (!fsm->a_vbus_vld)
- otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
- break;
- case OTG_STATE_A_SUSPEND:
- if (!fsm->b_conn && fsm->otg->host->b_hnp_enable)
- otg_set_state(fsm, OTG_STATE_A_PERIPHERAL);
- else if (!fsm->b_conn && !fsm->otg->host->b_hnp_enable)
- otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
- else if (fsm->a_bus_req || fsm->b_bus_resume)
- otg_set_state(fsm, OTG_STATE_A_HOST);
- else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout)
- otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
- else if (!fsm->a_vbus_vld)
- otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
- break;
- case OTG_STATE_A_PERIPHERAL:
- if (fsm->id || fsm->a_bus_drop)
- otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
- else if (fsm->b_bus_suspend)
- otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
- else if (!fsm->a_vbus_vld)
- otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
- break;
- case OTG_STATE_A_WAIT_VFALL:
- if (fsm->id || fsm->a_bus_req || (!fsm->a_sess_vld &&
- !fsm->b_conn))
- otg_set_state(fsm, OTG_STATE_A_IDLE);
- break;
- case OTG_STATE_A_VBUS_ERR:
- if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err)
- otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
- break;
- default:
- break;
- }
- spin_unlock_irqrestore(&fsm->lock, flags);
-
- VDBG("quit statemachine, changed = %d\n", state_changed);
- return state_changed;
-}
+++ /dev/null
-/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#undef DEBUG
-#undef VERBOSE
-
-#ifdef DEBUG
-#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \
- __func__, ## args)
-#else
-#define DBG(fmt, args...) do {} while (0)
-#endif
-
-#ifdef VERBOSE
-#define VDBG DBG
-#else
-#define VDBG(stuff...) do {} while (0)
-#endif
-
-#ifdef VERBOSE
-#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
-#else
-#define MPC_LOC do {} while (0)
-#endif
-
-#define PROTO_UNDEF (0)
-#define PROTO_HOST (1)
-#define PROTO_GADGET (2)
-
-/* OTG state machine according to the OTG spec */
-struct otg_fsm {
- /* Input */
- int a_bus_resume;
- int a_bus_suspend;
- int a_conn;
- int a_sess_vld;
- int a_srp_det;
- int a_vbus_vld;
- int b_bus_resume;
- int b_bus_suspend;
- int b_conn;
- int b_se0_srp;
- int b_sess_end;
- int b_sess_vld;
- int id;
-
- /* Internal variables */
- int a_set_b_hnp_en;
- int b_srp_done;
- int b_hnp_enable;
-
- /* Timeout indicator for timers */
- int a_wait_vrise_tmout;
- int a_wait_bcon_tmout;
- int a_aidl_bdis_tmout;
- int b_ase0_brst_tmout;
-
- /* Informative variables */
- int a_bus_drop;
- int a_bus_req;
- int a_clr_err;
- int a_suspend_req;
- int b_bus_req;
-
- /* Output */
- int drv_vbus;
- int loc_conn;
- int loc_sof;
-
- struct otg_fsm_ops *ops;
- struct usb_otg *otg;
-
- /* Current usb protocol used: 0:undefine; 1:host; 2:client */
- int protocol;
- spinlock_t lock;
-};
-
-struct otg_fsm_ops {
- void (*chrg_vbus)(int on);
- void (*drv_vbus)(int on);
- void (*loc_conn)(int on);
- void (*loc_sof)(int on);
- void (*start_pulse)(void);
- void (*add_timer)(void *timer);
- void (*del_timer)(void *timer);
- int (*start_host)(struct otg_fsm *fsm, int on);
- int (*start_gadget)(struct otg_fsm *fsm, int on);
-};
-
-
-static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
-{
- fsm->ops->chrg_vbus(on);
-}
-
-static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
-{
- if (fsm->drv_vbus != on) {
- fsm->drv_vbus = on;
- fsm->ops->drv_vbus(on);
- }
-}
-
-static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
-{
- if (fsm->loc_conn != on) {
- fsm->loc_conn = on;
- fsm->ops->loc_conn(on);
- }
-}
-
-static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
-{
- if (fsm->loc_sof != on) {
- fsm->loc_sof = on;
- fsm->ops->loc_sof(on);
- }
-}
-
-static inline void otg_start_pulse(struct otg_fsm *fsm)
-{
- fsm->ops->start_pulse();
-}
-
-static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
-{
- fsm->ops->add_timer(timer);
-}
-
-static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
-{
- fsm->ops->del_timer(timer);
-}
-
-int otg_statemachine(struct otg_fsm *fsm);
-
-/* Defined by device specific driver, for different timer implementation */
-extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
- *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr,
- *a_wait_enum_tmr;
+++ /dev/null
-/*
- * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller
- *
- * Copyright (C) 2004-2007 Texas Instruments
- * Copyright (C) 2008 Nokia Corporation
- * Contact: Felipe Balbi <felipe.balbi@nokia.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Current status:
- * - HS USB ULPI mode works.
- * - 3-pin mode support may be added in future.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/musb-omap.h>
-#include <linux/usb/ulpi.h>
-#include <linux/i2c/twl.h>
-#include <linux/regulator/consumer.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-
-/* Register defines */
-
-#define MCPC_CTRL 0x30
-#define MCPC_CTRL_RTSOL (1 << 7)
-#define MCPC_CTRL_EXTSWR (1 << 6)
-#define MCPC_CTRL_EXTSWC (1 << 5)
-#define MCPC_CTRL_VOICESW (1 << 4)
-#define MCPC_CTRL_OUT64K (1 << 3)
-#define MCPC_CTRL_RTSCTSSW (1 << 2)
-#define MCPC_CTRL_HS_UART (1 << 0)
-
-#define MCPC_IO_CTRL 0x33
-#define MCPC_IO_CTRL_MICBIASEN (1 << 5)
-#define MCPC_IO_CTRL_CTS_NPU (1 << 4)
-#define MCPC_IO_CTRL_RXD_PU (1 << 3)
-#define MCPC_IO_CTRL_TXDTYP (1 << 2)
-#define MCPC_IO_CTRL_CTSTYP (1 << 1)
-#define MCPC_IO_CTRL_RTSTYP (1 << 0)
-
-#define MCPC_CTRL2 0x36
-#define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
-
-#define OTHER_FUNC_CTRL 0x80
-#define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
-#define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
-
-#define OTHER_IFC_CTRL 0x83
-#define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
-#define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
-#define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
-#define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
-#define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
-#define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
-
-#define OTHER_INT_EN_RISE 0x86
-#define OTHER_INT_EN_FALL 0x89
-#define OTHER_INT_STS 0x8C
-#define OTHER_INT_LATCH 0x8D
-#define OTHER_INT_VB_SESS_VLD (1 << 7)
-#define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
-#define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
-#define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
-#define OTHER_INT_MANU (1 << 1)
-#define OTHER_INT_ABNORMAL_STRESS (1 << 0)
-
-#define ID_STATUS 0x96
-#define ID_RES_FLOAT (1 << 4)
-#define ID_RES_440K (1 << 3)
-#define ID_RES_200K (1 << 2)
-#define ID_RES_102K (1 << 1)
-#define ID_RES_GND (1 << 0)
-
-#define POWER_CTRL 0xAC
-#define POWER_CTRL_OTG_ENAB (1 << 5)
-
-#define OTHER_IFC_CTRL2 0xAF
-#define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
-#define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
-#define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
-#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
-#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
-#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
-
-#define REG_CTRL_EN 0xB2
-#define REG_CTRL_ERROR 0xB5
-#define ULPI_I2C_CONFLICT_INTEN (1 << 0)
-
-#define OTHER_FUNC_CTRL2 0xB8
-#define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
-
-/* following registers do not have separate _clr and _set registers */
-#define VBUS_DEBOUNCE 0xC0
-#define ID_DEBOUNCE 0xC1
-#define VBAT_TIMER 0xD3
-#define PHY_PWR_CTRL 0xFD
-#define PHY_PWR_PHYPWD (1 << 0)
-#define PHY_CLK_CTRL 0xFE
-#define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
-#define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
-#define REQ_PHY_DPLL_CLK (1 << 0)
-#define PHY_CLK_CTRL_STS 0xFF
-#define PHY_DPLL_CLK (1 << 0)
-
-/* In module TWL_MODULE_PM_MASTER */
-#define STS_HW_CONDITIONS 0x0F
-
-/* In module TWL_MODULE_PM_RECEIVER */
-#define VUSB_DEDICATED1 0x7D
-#define VUSB_DEDICATED2 0x7E
-#define VUSB1V5_DEV_GRP 0x71
-#define VUSB1V5_TYPE 0x72
-#define VUSB1V5_REMAP 0x73
-#define VUSB1V8_DEV_GRP 0x74
-#define VUSB1V8_TYPE 0x75
-#define VUSB1V8_REMAP 0x76
-#define VUSB3V1_DEV_GRP 0x77
-#define VUSB3V1_TYPE 0x78
-#define VUSB3V1_REMAP 0x79
-
-/* In module TWL4030_MODULE_INTBR */
-#define PMBR1 0x0D
-#define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
-
-struct twl4030_usb {
- struct usb_phy phy;
- struct device *dev;
-
- /* TWL4030 internal USB regulator supplies */
- struct regulator *usb1v5;
- struct regulator *usb1v8;
- struct regulator *usb3v1;
-
- /* for vbus reporting with irqs disabled */
- spinlock_t lock;
-
- /* pin configuration */
- enum twl4030_usb_mode usb_mode;
-
- int irq;
- enum omap_musb_vbus_id_status linkstat;
- bool vbus_supplied;
- u8 asleep;
- bool irq_enabled;
-};
-
-/* internal define on top of container_of */
-#define phy_to_twl(x) container_of((x), struct twl4030_usb, phy)
-
-/*-------------------------------------------------------------------------*/
-
-static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
- u8 module, u8 data, u8 address)
-{
- u8 check;
-
- if ((twl_i2c_write_u8(module, data, address) >= 0) &&
- (twl_i2c_read_u8(module, &check, address) >= 0) &&
- (check == data))
- return 0;
- dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
- 1, module, address, check, data);
-
- /* Failed once: Try again */
- if ((twl_i2c_write_u8(module, data, address) >= 0) &&
- (twl_i2c_read_u8(module, &check, address) >= 0) &&
- (check == data))
- return 0;
- dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
- 2, module, address, check, data);
-
- /* Failed again: Return error */
- return -EBUSY;
-}
-
-#define twl4030_usb_write_verify(twl, address, data) \
- twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address))
-
-static inline int twl4030_usb_write(struct twl4030_usb *twl,
- u8 address, u8 data)
-{
- int ret = 0;
-
- ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address);
- if (ret < 0)
- dev_dbg(twl->dev,
- "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
- return ret;
-}
-
-static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
-{
- u8 data;
- int ret = 0;
-
- ret = twl_i2c_read_u8(module, &data, address);
- if (ret >= 0)
- ret = data;
- else
- dev_dbg(twl->dev,
- "TWL4030:readb[0x%x,0x%x] Error %d\n",
- module, address, ret);
-
- return ret;
-}
-
-static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
-{
- return twl4030_readb(twl, TWL_MODULE_USB, address);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static inline int
-twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
-{
- return twl4030_usb_write(twl, ULPI_SET(reg), bits);
-}
-
-static inline int
-twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
-{
- return twl4030_usb_write(twl, ULPI_CLR(reg), bits);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static enum omap_musb_vbus_id_status
- twl4030_usb_linkstat(struct twl4030_usb *twl)
-{
- int status;
- enum omap_musb_vbus_id_status linkstat = OMAP_MUSB_UNKNOWN;
-
- twl->vbus_supplied = false;
-
- /*
- * For ID/VBUS sensing, see manual section 15.4.8 ...
- * except when using only battery backup power, two
- * comparators produce VBUS_PRES and ID_PRES signals,
- * which don't match docs elsewhere. But ... BIT(7)
- * and BIT(2) of STS_HW_CONDITIONS, respectively, do
- * seem to match up. If either is true the USB_PRES
- * signal is active, the OTG module is activated, and
- * its interrupt may be raised (may wake the system).
- */
- status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS);
- if (status < 0)
- dev_err(twl->dev, "USB link status err %d\n", status);
- else if (status & (BIT(7) | BIT(2))) {
- if (status & (BIT(7)))
- twl->vbus_supplied = true;
-
- if (status & BIT(2))
- linkstat = OMAP_MUSB_ID_GROUND;
- else
- linkstat = OMAP_MUSB_VBUS_VALID;
- } else {
- if (twl->linkstat != OMAP_MUSB_UNKNOWN)
- linkstat = OMAP_MUSB_VBUS_OFF;
- }
-
- dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
- status, status, linkstat);
-
- /* REVISIT this assumes host and peripheral controllers
- * are registered, and that both are active...
- */
-
- spin_lock_irq(&twl->lock);
- twl->linkstat = linkstat;
- spin_unlock_irq(&twl->lock);
-
- return linkstat;
-}
-
-static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
-{
- twl->usb_mode = mode;
-
- switch (mode) {
- case T2_USB_MODE_ULPI:
- twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL,
- ULPI_IFC_CTRL_CARKITMODE);
- twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
- twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL,
- ULPI_FUNC_CTRL_XCVRSEL_MASK |
- ULPI_FUNC_CTRL_OPMODE_MASK);
- break;
- case -1:
- /* FIXME: power on defaults */
- break;
- default:
- dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
- mode);
- break;
- };
-}
-
-static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
-{
- unsigned long timeout;
- int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
-
- if (val >= 0) {
- if (on) {
- /* enable DPLL to access PHY registers over I2C */
- val |= REQ_PHY_DPLL_CLK;
- WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
- (u8)val) < 0);
-
- timeout = jiffies + HZ;
- while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
- PHY_DPLL_CLK)
- && time_before(jiffies, timeout))
- udelay(10);
- if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
- PHY_DPLL_CLK))
- dev_err(twl->dev, "Timeout setting T2 HSUSB "
- "PHY DPLL clock\n");
- } else {
- /* let ULPI control the DPLL clock */
- val &= ~REQ_PHY_DPLL_CLK;
- WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
- (u8)val) < 0);
- }
- }
-}
-
-static void __twl4030_phy_power(struct twl4030_usb *twl, int on)
-{
- u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
-
- if (on)
- pwr &= ~PHY_PWR_PHYPWD;
- else
- pwr |= PHY_PWR_PHYPWD;
-
- WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
-}
-
-static void twl4030_phy_power(struct twl4030_usb *twl, int on)
-{
- if (on) {
- regulator_enable(twl->usb3v1);
- regulator_enable(twl->usb1v8);
- /*
- * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
- * in twl4030) resets the VUSB_DEDICATED2 register. This reset
- * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
- * SLEEP. We work around this by clearing the bit after usv3v1
- * is re-activated. This ensures that VUSB3V1 is really active.
- */
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
- regulator_enable(twl->usb1v5);
- __twl4030_phy_power(twl, 1);
- twl4030_usb_write(twl, PHY_CLK_CTRL,
- twl4030_usb_read(twl, PHY_CLK_CTRL) |
- (PHY_CLK_CTRL_CLOCKGATING_EN |
- PHY_CLK_CTRL_CLK32K_EN));
- } else {
- __twl4030_phy_power(twl, 0);
- regulator_disable(twl->usb1v5);
- regulator_disable(twl->usb1v8);
- regulator_disable(twl->usb3v1);
- }
-}
-
-static void twl4030_phy_suspend(struct twl4030_usb *twl, int controller_off)
-{
- if (twl->asleep)
- return;
-
- twl4030_phy_power(twl, 0);
- twl->asleep = 1;
- dev_dbg(twl->dev, "%s\n", __func__);
-}
-
-static void __twl4030_phy_resume(struct twl4030_usb *twl)
-{
- twl4030_phy_power(twl, 1);
- twl4030_i2c_access(twl, 1);
- twl4030_usb_set_mode(twl, twl->usb_mode);
- if (twl->usb_mode == T2_USB_MODE_ULPI)
- twl4030_i2c_access(twl, 0);
-}
-
-static void twl4030_phy_resume(struct twl4030_usb *twl)
-{
- if (!twl->asleep)
- return;
- __twl4030_phy_resume(twl);
- twl->asleep = 0;
- dev_dbg(twl->dev, "%s\n", __func__);
-}
-
-static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
-{
- /* Enable writing to power configuration registers */
- twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
- TWL4030_PM_MASTER_PROTECT_KEY);
-
- twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
- TWL4030_PM_MASTER_PROTECT_KEY);
-
- /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/
- /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/
-
- /* input to VUSB3V1 LDO is from VBAT, not VBUS */
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
-
- /* Initialize 3.1V regulator */
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
-
- twl->usb3v1 = regulator_get(twl->dev, "usb3v1");
- if (IS_ERR(twl->usb3v1))
- return -ENODEV;
-
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
-
- /* Initialize 1.5V regulator */
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
-
- twl->usb1v5 = regulator_get(twl->dev, "usb1v5");
- if (IS_ERR(twl->usb1v5))
- goto fail1;
-
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
-
- /* Initialize 1.8V regulator */
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
-
- twl->usb1v8 = regulator_get(twl->dev, "usb1v8");
- if (IS_ERR(twl->usb1v8))
- goto fail2;
-
- twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
-
- /* disable access to power configuration registers */
- twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
- TWL4030_PM_MASTER_PROTECT_KEY);
-
- return 0;
-
-fail2:
- regulator_put(twl->usb1v5);
- twl->usb1v5 = NULL;
-fail1:
- regulator_put(twl->usb3v1);
- twl->usb3v1 = NULL;
- return -ENODEV;
-}
-
-static ssize_t twl4030_usb_vbus_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct twl4030_usb *twl = dev_get_drvdata(dev);
- unsigned long flags;
- int ret = -EINVAL;
-
- spin_lock_irqsave(&twl->lock, flags);
- ret = sprintf(buf, "%s\n",
- twl->vbus_supplied ? "on" : "off");
- spin_unlock_irqrestore(&twl->lock, flags);
-
- return ret;
-}
-static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
-
-static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
-{
- struct twl4030_usb *twl = _twl;
- enum omap_musb_vbus_id_status status;
-
- status = twl4030_usb_linkstat(twl);
- if (status > 0) {
- /* FIXME add a set_power() method so that B-devices can
- * configure the charger appropriately. It's not always
- * correct to consume VBUS power, and how much current to
- * consume is a function of the USB configuration chosen
- * by the host.
- *
- * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
- * its disconnect() sibling, when changing to/from the
- * USB_LINK_VBUS state. musb_hdrc won't care until it
- * starts to handle softconnect right.
- */
- if (status == OMAP_MUSB_VBUS_OFF ||
- status == OMAP_MUSB_ID_FLOAT)
- twl4030_phy_suspend(twl, 0);
- else
- twl4030_phy_resume(twl);
-
- omap_musb_mailbox(twl->linkstat);
- }
- sysfs_notify(&twl->dev->kobj, NULL, "vbus");
-
- return IRQ_HANDLED;
-}
-
-static void twl4030_usb_phy_init(struct twl4030_usb *twl)
-{
- enum omap_musb_vbus_id_status status;
-
- status = twl4030_usb_linkstat(twl);
- if (status > 0) {
- if (status == OMAP_MUSB_VBUS_OFF ||
- status == OMAP_MUSB_ID_FLOAT) {
- __twl4030_phy_power(twl, 0);
- twl->asleep = 1;
- } else {
- __twl4030_phy_resume(twl);
- twl->asleep = 0;
- }
-
- omap_musb_mailbox(twl->linkstat);
- }
- sysfs_notify(&twl->dev->kobj, NULL, "vbus");
-}
-
-static int twl4030_set_suspend(struct usb_phy *x, int suspend)
-{
- struct twl4030_usb *twl = phy_to_twl(x);
-
- if (suspend)
- twl4030_phy_suspend(twl, 1);
- else
- twl4030_phy_resume(twl);
-
- return 0;
-}
-
-static int twl4030_set_peripheral(struct usb_otg *otg,
- struct usb_gadget *gadget)
-{
- if (!otg)
- return -ENODEV;
-
- otg->gadget = gadget;
- if (!gadget)
- otg->phy->state = OTG_STATE_UNDEFINED;
-
- return 0;
-}
-
-static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- if (!otg)
- return -ENODEV;
-
- otg->host = host;
- if (!host)
- otg->phy->state = OTG_STATE_UNDEFINED;
-
- return 0;
-}
-
-static int twl4030_usb_probe(struct platform_device *pdev)
-{
- struct twl4030_usb_data *pdata = pdev->dev.platform_data;
- struct twl4030_usb *twl;
- int status, err;
- struct usb_otg *otg;
- struct device_node *np = pdev->dev.of_node;
-
- twl = devm_kzalloc(&pdev->dev, sizeof *twl, GFP_KERNEL);
- if (!twl)
- return -ENOMEM;
-
- if (np)
- of_property_read_u32(np, "usb_mode",
- (enum twl4030_usb_mode *)&twl->usb_mode);
- else if (pdata)
- twl->usb_mode = pdata->usb_mode;
- else {
- dev_err(&pdev->dev, "twl4030 initialized without pdata\n");
- return -EINVAL;
- }
-
- otg = devm_kzalloc(&pdev->dev, sizeof *otg, GFP_KERNEL);
- if (!otg)
- return -ENOMEM;
-
- twl->dev = &pdev->dev;
- twl->irq = platform_get_irq(pdev, 0);
- twl->vbus_supplied = false;
- twl->asleep = 1;
- twl->linkstat = OMAP_MUSB_UNKNOWN;
-
- twl->phy.dev = twl->dev;
- twl->phy.label = "twl4030";
- twl->phy.otg = otg;
- twl->phy.type = USB_PHY_TYPE_USB2;
- twl->phy.set_suspend = twl4030_set_suspend;
-
- otg->phy = &twl->phy;
- otg->set_host = twl4030_set_host;
- otg->set_peripheral = twl4030_set_peripheral;
-
- /* init spinlock for workqueue */
- spin_lock_init(&twl->lock);
-
- err = twl4030_usb_ldo_init(twl);
- if (err) {
- dev_err(&pdev->dev, "ldo init failed\n");
- return err;
- }
- usb_add_phy_dev(&twl->phy);
-
- platform_set_drvdata(pdev, twl);
- if (device_create_file(&pdev->dev, &dev_attr_vbus))
- dev_warn(&pdev->dev, "could not create sysfs file\n");
-
- /* Our job is to use irqs and status from the power module
- * to keep the transceiver disabled when nothing's connected.
- *
- * FIXME we actually shouldn't start enabling it until the
- * USB controller drivers have said they're ready, by calling
- * set_host() and/or set_peripheral() ... OTG_capable boards
- * need both handles, otherwise just one suffices.
- */
- twl->irq_enabled = true;
- status = request_threaded_irq(twl->irq, NULL, twl4030_usb_irq,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
- IRQF_ONESHOT, "twl4030_usb", twl);
- if (status < 0) {
- dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
- twl->irq, status);
- return status;
- }
-
- /* Power down phy or make it work according to
- * current link state.
- */
- twl4030_usb_phy_init(twl);
-
- dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
- return 0;
-}
-
-static int __exit twl4030_usb_remove(struct platform_device *pdev)
-{
- struct twl4030_usb *twl = platform_get_drvdata(pdev);
- int val;
-
- free_irq(twl->irq, twl);
- device_remove_file(twl->dev, &dev_attr_vbus);
-
- /* set transceiver mode to power on defaults */
- twl4030_usb_set_mode(twl, -1);
-
- /* autogate 60MHz ULPI clock,
- * clear dpll clock request for i2c access,
- * disable 32KHz
- */
- val = twl4030_usb_read(twl, PHY_CLK_CTRL);
- if (val >= 0) {
- val |= PHY_CLK_CTRL_CLOCKGATING_EN;
- val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
- twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
- }
-
- /* disable complete OTG block */
- twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
-
- if (!twl->asleep)
- twl4030_phy_power(twl, 0);
- regulator_put(twl->usb1v5);
- regulator_put(twl->usb1v8);
- regulator_put(twl->usb3v1);
-
- return 0;
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id twl4030_usb_id_table[] = {
- { .compatible = "ti,twl4030-usb" },
- {}
-};
-MODULE_DEVICE_TABLE(of, twl4030_usb_id_table);
-#endif
-
-static struct platform_driver twl4030_usb_driver = {
- .probe = twl4030_usb_probe,
- .remove = __exit_p(twl4030_usb_remove),
- .driver = {
- .name = "twl4030_usb",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(twl4030_usb_id_table),
- },
-};
-
-static int __init twl4030_usb_init(void)
-{
- return platform_driver_register(&twl4030_usb_driver);
-}
-subsys_initcall(twl4030_usb_init);
-
-static void __exit twl4030_usb_exit(void)
-{
- platform_driver_unregister(&twl4030_usb_driver);
-}
-module_exit(twl4030_usb_exit);
-
-MODULE_ALIAS("platform:twl4030_usb");
-MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
-MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
- *
- * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Author: Hema HK <hemahk@ti.com>
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/usb/musb-omap.h>
-#include <linux/usb/phy_companion.h>
-#include <linux/usb/omap_usb.h>
-#include <linux/i2c/twl.h>
-#include <linux/regulator/consumer.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-
-/* usb register definitions */
-#define USB_VENDOR_ID_LSB 0x00
-#define USB_VENDOR_ID_MSB 0x01
-#define USB_PRODUCT_ID_LSB 0x02
-#define USB_PRODUCT_ID_MSB 0x03
-#define USB_VBUS_CTRL_SET 0x04
-#define USB_VBUS_CTRL_CLR 0x05
-#define USB_ID_CTRL_SET 0x06
-#define USB_ID_CTRL_CLR 0x07
-#define USB_VBUS_INT_SRC 0x08
-#define USB_VBUS_INT_LATCH_SET 0x09
-#define USB_VBUS_INT_LATCH_CLR 0x0A
-#define USB_VBUS_INT_EN_LO_SET 0x0B
-#define USB_VBUS_INT_EN_LO_CLR 0x0C
-#define USB_VBUS_INT_EN_HI_SET 0x0D
-#define USB_VBUS_INT_EN_HI_CLR 0x0E
-#define USB_ID_INT_SRC 0x0F
-#define USB_ID_INT_LATCH_SET 0x10
-#define USB_ID_INT_LATCH_CLR 0x11
-
-#define USB_ID_INT_EN_LO_SET 0x12
-#define USB_ID_INT_EN_LO_CLR 0x13
-#define USB_ID_INT_EN_HI_SET 0x14
-#define USB_ID_INT_EN_HI_CLR 0x15
-#define USB_OTG_ADP_CTRL 0x16
-#define USB_OTG_ADP_HIGH 0x17
-#define USB_OTG_ADP_LOW 0x18
-#define USB_OTG_ADP_RISE 0x19
-#define USB_OTG_REVISION 0x1A
-
-/* to be moved to LDO */
-#define TWL6030_MISC2 0xE5
-#define TWL6030_CFG_LDO_PD2 0xF5
-#define TWL6030_BACKUP_REG 0xFA
-
-#define STS_HW_CONDITIONS 0x21
-
-/* In module TWL6030_MODULE_PM_MASTER */
-#define STS_HW_CONDITIONS 0x21
-#define STS_USB_ID BIT(2)
-
-/* In module TWL6030_MODULE_PM_RECEIVER */
-#define VUSB_CFG_TRANS 0x71
-#define VUSB_CFG_STATE 0x72
-#define VUSB_CFG_VOLTAGE 0x73
-
-/* in module TWL6030_MODULE_MAIN_CHARGE */
-
-#define CHARGERUSB_CTRL1 0x8
-
-#define CONTROLLER_STAT1 0x03
-#define VBUS_DET BIT(2)
-
-struct twl6030_usb {
- struct phy_companion comparator;
- struct device *dev;
-
- /* for vbus reporting with irqs disabled */
- spinlock_t lock;
-
- struct regulator *usb3v3;
-
- /* used to set vbus, in atomic path */
- struct work_struct set_vbus_work;
-
- int irq1;
- int irq2;
- enum omap_musb_vbus_id_status linkstat;
- u8 asleep;
- bool irq_enabled;
- bool vbus_enable;
- const char *regulator;
-};
-
-#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)
-
-/*-------------------------------------------------------------------------*/
-
-static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
- u8 data, u8 address)
-{
- int ret = 0;
-
- ret = twl_i2c_write_u8(module, data, address);
- if (ret < 0)
- dev_err(twl->dev,
- "Write[0x%x] Error %d\n", address, ret);
- return ret;
-}
-
-static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
-{
- u8 data, ret = 0;
-
- ret = twl_i2c_read_u8(module, &data, address);
- if (ret >= 0)
- ret = data;
- else
- dev_err(twl->dev,
- "readb[0x%x,0x%x] Error %d\n",
- module, address, ret);
- return ret;
-}
-
-static int twl6030_start_srp(struct phy_companion *comparator)
-{
- struct twl6030_usb *twl = comparator_to_twl(comparator);
-
- twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
- twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
-
- mdelay(100);
- twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);
-
- return 0;
-}
-
-static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
-{
- /* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
- twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG);
-
- /* Program CFG_LDO_PD2 register and set VUSB bit */
- twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_CFG_LDO_PD2);
-
- /* Program MISC2 register and set bit VUSB_IN_VBAT */
- twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2);
-
- twl->usb3v3 = regulator_get(twl->dev, twl->regulator);
- if (IS_ERR(twl->usb3v3))
- return -ENODEV;
-
- /* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
- twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
-
- /*
- * Program the USB_ID_CTRL_SET register to enable GND drive
- * and the ID comparators
- */
- twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
-
- return 0;
-}
-
-static ssize_t twl6030_usb_vbus_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct twl6030_usb *twl = dev_get_drvdata(dev);
- unsigned long flags;
- int ret = -EINVAL;
-
- spin_lock_irqsave(&twl->lock, flags);
-
- switch (twl->linkstat) {
- case OMAP_MUSB_VBUS_VALID:
- ret = snprintf(buf, PAGE_SIZE, "vbus\n");
- break;
- case OMAP_MUSB_ID_GROUND:
- ret = snprintf(buf, PAGE_SIZE, "id\n");
- break;
- case OMAP_MUSB_VBUS_OFF:
- ret = snprintf(buf, PAGE_SIZE, "none\n");
- break;
- default:
- ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
- }
- spin_unlock_irqrestore(&twl->lock, flags);
-
- return ret;
-}
-static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
-
-static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
-{
- struct twl6030_usb *twl = _twl;
- enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN;
- u8 vbus_state, hw_state;
-
- hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
-
- vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
- CONTROLLER_STAT1);
- if (!(hw_state & STS_USB_ID)) {
- if (vbus_state & VBUS_DET) {
- regulator_enable(twl->usb3v3);
- twl->asleep = 1;
- status = OMAP_MUSB_VBUS_VALID;
- twl->linkstat = status;
- omap_musb_mailbox(status);
- } else {
- if (twl->linkstat != OMAP_MUSB_UNKNOWN) {
- status = OMAP_MUSB_VBUS_OFF;
- twl->linkstat = status;
- omap_musb_mailbox(status);
- if (twl->asleep) {
- regulator_disable(twl->usb3v3);
- twl->asleep = 0;
- }
- }
- }
- }
- sysfs_notify(&twl->dev->kobj, NULL, "vbus");
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
-{
- struct twl6030_usb *twl = _twl;
- enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN;
- u8 hw_state;
-
- hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
-
- if (hw_state & STS_USB_ID) {
-
- regulator_enable(twl->usb3v3);
- twl->asleep = 1;
- twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
- twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
- status = OMAP_MUSB_ID_GROUND;
- twl->linkstat = status;
- omap_musb_mailbox(status);
- } else {
- twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
- twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
- }
- twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR);
-
- return IRQ_HANDLED;
-}
-
-static int twl6030_enable_irq(struct twl6030_usb *twl)
-{
- twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
- twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
- twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
-
- twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
- REG_INT_MSK_LINE_C);
- twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
- REG_INT_MSK_STS_C);
- twl6030_usb_irq(twl->irq2, twl);
- twl6030_usbotg_irq(twl->irq1, twl);
-
- return 0;
-}
-
-static void otg_set_vbus_work(struct work_struct *data)
-{
- struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
- set_vbus_work);
-
- /*
- * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
- * register. This enables boost mode.
- */
-
- if (twl->vbus_enable)
- twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40,
- CHARGERUSB_CTRL1);
- else
- twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00,
- CHARGERUSB_CTRL1);
-}
-
-static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled)
-{
- struct twl6030_usb *twl = comparator_to_twl(comparator);
-
- twl->vbus_enable = enabled;
- schedule_work(&twl->set_vbus_work);
-
- return 0;
-}
-
-static int twl6030_usb_probe(struct platform_device *pdev)
-{
- u32 ret;
- struct twl6030_usb *twl;
- int status, err;
- struct device_node *np = pdev->dev.of_node;
- struct device *dev = &pdev->dev;
- struct twl4030_usb_data *pdata = dev->platform_data;
-
- twl = devm_kzalloc(dev, sizeof *twl, GFP_KERNEL);
- if (!twl)
- return -ENOMEM;
-
- twl->dev = &pdev->dev;
- twl->irq1 = platform_get_irq(pdev, 0);
- twl->irq2 = platform_get_irq(pdev, 1);
- twl->linkstat = OMAP_MUSB_UNKNOWN;
-
- twl->comparator.set_vbus = twl6030_set_vbus;
- twl->comparator.start_srp = twl6030_start_srp;
-
- ret = omap_usb2_set_comparator(&twl->comparator);
- if (ret == -ENODEV) {
- dev_info(&pdev->dev, "phy not ready, deferring probe");
- return -EPROBE_DEFER;
- }
-
- if (np) {
- twl->regulator = "usb";
- } else if (pdata) {
- if (pdata->features & TWL6025_SUBCLASS)
- twl->regulator = "ldousb";
- else
- twl->regulator = "vusb";
- } else {
- dev_err(&pdev->dev, "twl6030 initialized without pdata\n");
- return -EINVAL;
- }
-
- /* init spinlock for workqueue */
- spin_lock_init(&twl->lock);
-
- err = twl6030_usb_ldo_init(twl);
- if (err) {
- dev_err(&pdev->dev, "ldo init failed\n");
- return err;
- }
-
- platform_set_drvdata(pdev, twl);
- if (device_create_file(&pdev->dev, &dev_attr_vbus))
- dev_warn(&pdev->dev, "could not create sysfs file\n");
-
- INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
-
- twl->irq_enabled = true;
- status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "twl6030_usb", twl);
- if (status < 0) {
- dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
- twl->irq1, status);
- device_remove_file(twl->dev, &dev_attr_vbus);
- return status;
- }
-
- status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "twl6030_usb", twl);
- if (status < 0) {
- dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
- twl->irq2, status);
- free_irq(twl->irq1, twl);
- device_remove_file(twl->dev, &dev_attr_vbus);
- return status;
- }
-
- twl->asleep = 0;
- twl6030_enable_irq(twl);
- dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
-
- return 0;
-}
-
-static int __exit twl6030_usb_remove(struct platform_device *pdev)
-{
- struct twl6030_usb *twl = platform_get_drvdata(pdev);
-
- twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
- REG_INT_MSK_LINE_C);
- twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
- REG_INT_MSK_STS_C);
- free_irq(twl->irq1, twl);
- free_irq(twl->irq2, twl);
- regulator_put(twl->usb3v3);
- device_remove_file(twl->dev, &dev_attr_vbus);
- cancel_work_sync(&twl->set_vbus_work);
-
- return 0;
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id twl6030_usb_id_table[] = {
- { .compatible = "ti,twl6030-usb" },
- {}
-};
-MODULE_DEVICE_TABLE(of, twl6030_usb_id_table);
-#endif
-
-static struct platform_driver twl6030_usb_driver = {
- .probe = twl6030_usb_probe,
- .remove = __exit_p(twl6030_usb_remove),
- .driver = {
- .name = "twl6030_usb",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(twl6030_usb_id_table),
- },
-};
-
-static int __init twl6030_usb_init(void)
-{
- return platform_driver_register(&twl6030_usb_driver);
-}
-subsys_initcall(twl6030_usb_init);
-
-static void __exit twl6030_usb_exit(void)
-{
- platform_driver_unregister(&twl6030_usb_driver);
-}
-module_exit(twl6030_usb_exit);
-
-MODULE_ALIAS("platform:twl6030_usb");
-MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
-MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Generic ULPI USB transceiver support
- *
- * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
- *
- * Based on sources from
- *
- * Sascha Hauer <s.hauer@pengutronix.de>
- * Freescale Semiconductors
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include <linux/usb.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/ulpi.h>
-
-
-struct ulpi_info {
- unsigned int id;
- char *name;
-};
-
-#define ULPI_ID(vendor, product) (((vendor) << 16) | (product))
-#define ULPI_INFO(_id, _name) \
- { \
- .id = (_id), \
- .name = (_name), \
- }
-
-/* ULPI hardcoded IDs, used for probing */
-static struct ulpi_info ulpi_ids[] = {
- ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"),
- ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"),
-};
-
-static int ulpi_set_otg_flags(struct usb_phy *phy)
-{
- unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN |
- ULPI_OTG_CTRL_DM_PULLDOWN;
-
- if (phy->flags & ULPI_OTG_ID_PULLUP)
- flags |= ULPI_OTG_CTRL_ID_PULLUP;
-
- /*
- * ULPI Specification rev.1.1 default
- * for Dp/DmPulldown is enabled.
- */
- if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS)
- flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN;
-
- if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS)
- flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN;
-
- if (phy->flags & ULPI_OTG_EXTVBUSIND)
- flags |= ULPI_OTG_CTRL_EXTVBUSIND;
-
- return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL);
-}
-
-static int ulpi_set_fc_flags(struct usb_phy *phy)
-{
- unsigned int flags = 0;
-
- /*
- * ULPI Specification rev.1.1 default
- * for XcvrSelect is Full Speed.
- */
- if (phy->flags & ULPI_FC_HS)
- flags |= ULPI_FUNC_CTRL_HIGH_SPEED;
- else if (phy->flags & ULPI_FC_LS)
- flags |= ULPI_FUNC_CTRL_LOW_SPEED;
- else if (phy->flags & ULPI_FC_FS4LS)
- flags |= ULPI_FUNC_CTRL_FS4LS;
- else
- flags |= ULPI_FUNC_CTRL_FULL_SPEED;
-
- if (phy->flags & ULPI_FC_TERMSEL)
- flags |= ULPI_FUNC_CTRL_TERMSELECT;
-
- /*
- * ULPI Specification rev.1.1 default
- * for OpMode is Normal Operation.
- */
- if (phy->flags & ULPI_FC_OP_NODRV)
- flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
- else if (phy->flags & ULPI_FC_OP_DIS_NRZI)
- flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI;
- else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP)
- flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP;
- else
- flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
-
- /*
- * ULPI Specification rev.1.1 default
- * for SuspendM is Powered.
- */
- flags |= ULPI_FUNC_CTRL_SUSPENDM;
-
- return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL);
-}
-
-static int ulpi_set_ic_flags(struct usb_phy *phy)
-{
- unsigned int flags = 0;
-
- if (phy->flags & ULPI_IC_AUTORESUME)
- flags |= ULPI_IFC_CTRL_AUTORESUME;
-
- if (phy->flags & ULPI_IC_EXTVBUS_INDINV)
- flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS;
-
- if (phy->flags & ULPI_IC_IND_PASSTHRU)
- flags |= ULPI_IFC_CTRL_PASSTHRU;
-
- if (phy->flags & ULPI_IC_PROTECT_DIS)
- flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE;
-
- return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL);
-}
-
-static int ulpi_set_flags(struct usb_phy *phy)
-{
- int ret;
-
- ret = ulpi_set_otg_flags(phy);
- if (ret)
- return ret;
-
- ret = ulpi_set_ic_flags(phy);
- if (ret)
- return ret;
-
- return ulpi_set_fc_flags(phy);
-}
-
-static int ulpi_check_integrity(struct usb_phy *phy)
-{
- int ret, i;
- unsigned int val = 0x55;
-
- for (i = 0; i < 2; i++) {
- ret = usb_phy_io_write(phy, val, ULPI_SCRATCH);
- if (ret < 0)
- return ret;
-
- ret = usb_phy_io_read(phy, ULPI_SCRATCH);
- if (ret < 0)
- return ret;
-
- if (ret != val) {
- pr_err("ULPI integrity check: failed!");
- return -ENODEV;
- }
- val = val << 1;
- }
-
- pr_info("ULPI integrity check: passed.\n");
-
- return 0;
-}
-
-static int ulpi_init(struct usb_phy *phy)
-{
- int i, vid, pid, ret;
- u32 ulpi_id = 0;
-
- for (i = 0; i < 4; i++) {
- ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i);
- if (ret < 0)
- return ret;
- ulpi_id = (ulpi_id << 8) | ret;
- }
- vid = ulpi_id & 0xffff;
- pid = ulpi_id >> 16;
-
- pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);
-
- for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) {
- if (ulpi_ids[i].id == ULPI_ID(vid, pid)) {
- pr_info("Found %s ULPI transceiver.\n",
- ulpi_ids[i].name);
- break;
- }
- }
-
- ret = ulpi_check_integrity(phy);
- if (ret)
- return ret;
-
- return ulpi_set_flags(phy);
-}
-
-static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct usb_phy *phy = otg->phy;
- unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL);
-
- if (!host) {
- otg->host = NULL;
- return 0;
- }
-
- otg->host = host;
-
- flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE |
- ULPI_IFC_CTRL_3_PIN_SERIAL_MODE |
- ULPI_IFC_CTRL_CARKITMODE);
-
- if (phy->flags & ULPI_IC_6PIN_SERIAL)
- flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE;
- else if (phy->flags & ULPI_IC_3PIN_SERIAL)
- flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE;
- else if (phy->flags & ULPI_IC_CARKIT)
- flags |= ULPI_IFC_CTRL_CARKITMODE;
-
- return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL);
-}
-
-static int ulpi_set_vbus(struct usb_otg *otg, bool on)
-{
- struct usb_phy *phy = otg->phy;
- unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL);
-
- flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT);
-
- if (on) {
- if (phy->flags & ULPI_OTG_DRVVBUS)
- flags |= ULPI_OTG_CTRL_DRVVBUS;
-
- if (phy->flags & ULPI_OTG_DRVVBUS_EXT)
- flags |= ULPI_OTG_CTRL_DRVVBUS_EXT;
- }
-
- return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL);
-}
-
-struct usb_phy *
-otg_ulpi_create(struct usb_phy_io_ops *ops,
- unsigned int flags)
-{
- struct usb_phy *phy;
- struct usb_otg *otg;
-
- phy = kzalloc(sizeof(*phy), GFP_KERNEL);
- if (!phy)
- return NULL;
-
- otg = kzalloc(sizeof(*otg), GFP_KERNEL);
- if (!otg) {
- kfree(phy);
- return NULL;
- }
-
- phy->label = "ULPI";
- phy->flags = flags;
- phy->io_ops = ops;
- phy->otg = otg;
- phy->init = ulpi_init;
-
- otg->phy = phy;
- otg->set_host = ulpi_set_host;
- otg->set_vbus = ulpi_set_vbus;
-
- return phy;
-}
-EXPORT_SYMBOL_GPL(otg_ulpi_create);
-
+++ /dev/null
-/*
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/usb.h>
-#include <linux/io.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/ulpi.h>
-
-#define ULPI_VIEW_WAKEUP (1 << 31)
-#define ULPI_VIEW_RUN (1 << 30)
-#define ULPI_VIEW_WRITE (1 << 29)
-#define ULPI_VIEW_READ (0 << 29)
-#define ULPI_VIEW_ADDR(x) (((x) & 0xff) << 16)
-#define ULPI_VIEW_DATA_READ(x) (((x) >> 8) & 0xff)
-#define ULPI_VIEW_DATA_WRITE(x) ((x) & 0xff)
-
-static int ulpi_viewport_wait(void __iomem *view, u32 mask)
-{
- unsigned long usec = 2000;
-
- while (usec--) {
- if (!(readl(view) & mask))
- return 0;
-
- udelay(1);
- };
-
- return -ETIMEDOUT;
-}
-
-static int ulpi_viewport_read(struct usb_phy *otg, u32 reg)
-{
- int ret;
- void __iomem *view = otg->io_priv;
-
- writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
- ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
- if (ret)
- return ret;
-
- writel(ULPI_VIEW_RUN | ULPI_VIEW_READ | ULPI_VIEW_ADDR(reg), view);
- ret = ulpi_viewport_wait(view, ULPI_VIEW_RUN);
- if (ret)
- return ret;
-
- return ULPI_VIEW_DATA_READ(readl(view));
-}
-
-static int ulpi_viewport_write(struct usb_phy *otg, u32 val, u32 reg)
-{
- int ret;
- void __iomem *view = otg->io_priv;
-
- writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
- ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
- if (ret)
- return ret;
-
- writel(ULPI_VIEW_RUN | ULPI_VIEW_WRITE | ULPI_VIEW_DATA_WRITE(val) |
- ULPI_VIEW_ADDR(reg), view);
-
- return ulpi_viewport_wait(view, ULPI_VIEW_RUN);
-}
-
-struct usb_phy_io_ops ulpi_viewport_access_ops = {
- .read = ulpi_viewport_read,
- .write = ulpi_viewport_write,
-};
comment "USB Physical Layer drivers"
depends on USB || USB_GADGET
+config USB_OTG_UTILS
+ bool
+ help
+ Select this to make sure the build includes objects from
+ the OTG infrastructure directory.
+
+if USB || USB_GADGET
+
+#
+# USB Transceiver Drivers
+#
+config AB8500_USB
+ tristate "AB8500 USB Transceiver Driver"
+ depends on AB8500_CORE
+ select USB_OTG_UTILS
+ help
+ Enable this to support the USB OTG transceiver in AB8500 chip.
+ This transceiver supports high and full speed devices plus,
+ in host mode, low speed.
+
+config FSL_USB2_OTG
+ bool "Freescale USB OTG Transceiver Driver"
+ depends on USB_EHCI_FSL && USB_FSL_USB2 && USB_SUSPEND
+ select USB_OTG
+ select USB_OTG_UTILS
+ help
+ Enable this to support Freescale USB OTG transceiver.
+
+config ISP1301_OMAP
+ tristate "Philips ISP1301 with OMAP OTG"
+ depends on I2C && ARCH_OMAP_OTG
+ select USB_OTG_UTILS
+ help
+ If you say yes here you get support for the Philips ISP1301
+ USB-On-The-Go transceiver working with the OMAP OTG controller.
+ The ISP1301 is a full speed USB transceiver which is used in
+ products including H2, H3, and H4 development boards for Texas
+ Instruments OMAP processors.
+
+ This driver can also be built as a module. If so, the module
+ will be called isp1301_omap.
+
+config MV_U3D_PHY
+ bool "Marvell USB 3.0 PHY controller Driver"
+ depends on USB_MV_U3D
+ select USB_OTG_UTILS
+ help
+ Enable this to support Marvell USB 3.0 phy controller for Marvell
+ SoC.
+
+config NOP_USB_XCEIV
+ tristate "NOP USB Transceiver Driver"
+ select USB_OTG_UTILS
+ help
+ This driver is to be used by all the usb transceiver which are either
+ built-in with usb ip or which are autonomous and doesn't require any
+ phy programming such as ISP1x04 etc.
+
+config OMAP_CONTROL_USB
+ tristate "OMAP CONTROL USB Driver"
+ help
+ Enable this to add support for the USB part present in the control
+ module. This driver has API to power on the USB2 PHY and to write to
+ the mailbox. The mailbox is present only in omap4 and the register to
+ power on the USB2 PHY is present in OMAP4 and OMAP5. OMAP5 has an
+ additional register to power on USB3 PHY.
+
config OMAP_USB2
tristate "OMAP USB2 PHY Driver"
depends on ARCH_OMAP2PLUS
This driver interacts with the "OMAP Control USB Driver" to power
on/off the PHY.
-config OMAP_CONTROL_USB
- tristate "OMAP CONTROL USB Driver"
+config SAMSUNG_USBPHY
+ bool "Samsung USB PHY controller Driver"
+ depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS
+ select USB_OTG_UTILS
help
- Enable this to add support for the USB part present in the control
- module. This driver has API to power on the USB2 PHY and to write to
- the mailbox. The mailbox is present only in omap4 and the register to
- power on the USB2 PHY is present in OMAP4 and OMAP5. OMAP5 has an
- additional register to power on USB3 PHY.
+ Enable this to support Samsung USB phy controller for samsung
+ SoCs.
+
+config TWL4030_USB
+ tristate "TWL4030 USB Transceiver Driver"
+ depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS
+ select USB_OTG_UTILS
+ help
+ Enable this to support the USB OTG transceiver on TWL4030
+ family chips (including the TWL5030 and TPS659x0 devices).
+ This transceiver supports high and full speed devices plus,
+ in host mode, low speed.
+
+config TWL6030_USB
+ tristate "TWL6030 USB Transceiver Driver"
+ depends on TWL4030_CORE && OMAP_USB2 && USB_MUSB_OMAP2PLUS
+ select USB_OTG_UTILS
+ help
+ Enable this to support the USB OTG transceiver on TWL6030
+ family chips. This TWL6030 transceiver has the VBUS and ID GND
+ and OTG SRP events capabilities. For all other transceiver functionality
+ UTMI PHY is embedded in OMAP4430. The internal PHY configurations APIs
+ are hooked to this driver through platform_data structure.
+ The definition of internal PHY APIs are in the mach-omap2 layer.
+
+config USB_GPIO_VBUS
+ tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
+ depends on GENERIC_GPIO
+ select USB_OTG_UTILS
+ help
+ Provides simple GPIO VBUS sensing for controllers with an
+ internal transceiver via the usb_phy interface, and
+ optionally control of a D+ pullup GPIO as well as a VBUS
+ current limit regulator.
config USB_ISP1301
tristate "NXP ISP1301 USB transceiver support"
To compile this driver as a module, choose M here: the
module will be called isp1301.
-config MV_U3D_PHY
- bool "Marvell USB 3.0 PHY controller Driver"
- depends on USB_MV_U3D
+config USB_MSM_OTG
+ tristate "OTG support for Qualcomm on-chip USB controller"
+ depends on (USB || USB_GADGET) && ARCH_MSM
select USB_OTG_UTILS
help
- Enable this to support Marvell USB 3.0 phy controller for Marvell
- SoC.
+ Enable this to support the USB OTG transceiver on MSM chips. It
+ handles PHY initialization, clock management, and workarounds
+ required after resetting the hardware and power management.
+ This driver is required even for peripheral only or host only
+ mode configurations.
+ This driver is not supported on boards like trout which
+ has an external PHY.
+
+config USB_MV_OTG
+ tristate "Marvell USB OTG support"
+ depends on USB_EHCI_MV && USB_MV_UDC && USB_SUSPEND
+ select USB_OTG
+ select USB_OTG_UTILS
+ help
+ Say Y here if you want to build Marvell USB OTG transciever
+ driver in kernel (including PXA and MMP series). This driver
+ implements role switch between EHCI host driver and gadget driver.
+
+ To compile this driver as a module, choose M here.
+
+config USB_MXS_PHY
+ tristate "Freescale MXS USB PHY support"
+ depends on ARCH_MXC || ARCH_MXS
+ select STMP_DEVICE
+ select USB_OTG_UTILS
+ help
+ Enable this to support the Freescale MXS USB PHY.
+
+ MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x.
config USB_RCAR_PHY
tristate "Renesas R-Car USB phy support"
To compile this driver as a module, choose M here: the
module will be called rcar-phy.
-config SAMSUNG_USBPHY
- bool "Samsung USB PHY controller Driver"
- depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS
+config USB_ULPI
+ bool "Generic ULPI Transceiver Driver"
+ depends on ARM
select USB_OTG_UTILS
help
- Enable this to support Samsung USB phy controller for samsung
- SoCs.
+ Enable this to support ULPI connected USB OTG transceivers which
+ are likely found on embedded boards.
+
+config USB_ULPI_VIEWPORT
+ bool
+ depends on USB_ULPI
+ help
+ Provides read/write operations to the ULPI phy register set for
+ controllers with a viewport register (e.g. Chipidea/ARC controllers).
+
+endif # USB || OTG
ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG
obj-$(CONFIG_USB_OTG_UTILS) += phy.o
+
+# transceiver drivers, keep the list sorted
+
+obj-$(CONFIG_AB8500_USB) += ab8500-usb.o
+fsl_usb2_otg-objs := fsl_otg.o otg_fsm.o
+obj-$(CONFIG_FSL_USB2_OTG) += fsl_usb2_otg.o
+obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
+obj-$(CONFIG_MV_U3D_PHY) += mv_u3d_phy.o
+obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o
+obj-$(CONFIG_OMAP_CONTROL_USB) += omap-control-usb.o
obj-$(CONFIG_OMAP_USB2) += omap-usb2.o
obj-$(CONFIG_OMAP_USB3) += omap-usb3.o
-obj-$(CONFIG_OMAP_CONTROL_USB) += omap-control-usb.o
+obj-$(CONFIG_SAMSUNG_USBPHY) += samsung-usbphy.o
+obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
+obj-$(CONFIG_TWL6030_USB) += twl6030-usb.o
+obj-$(CONFIG_USB_EHCI_TEGRA) += tegra_usb_phy.o
+obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
obj-$(CONFIG_USB_ISP1301) += isp1301.o
-obj-$(CONFIG_MV_U3D_PHY) += mv_u3d_phy.o
-obj-$(CONFIG_USB_EHCI_TEGRA) += tegra_usb_phy.o
+obj-$(CONFIG_USB_MSM_OTG) += msm_otg.o
+obj-$(CONFIG_USB_MV_OTG) += mv_otg.o
+obj-$(CONFIG_USB_MXS_PHY) += mxs-phy.o
obj-$(CONFIG_USB_RCAR_PHY) += rcar-phy.o
-obj-$(CONFIG_SAMSUNG_USBPHY) += samsung-usbphy.o
+obj-$(CONFIG_USB_ULPI) += ulpi.o
+obj-$(CONFIG_USB_ULPI_VIEWPORT) += ulpi_viewport.o
--- /dev/null
+/*
+ * drivers/usb/otg/ab8500_usb.c
+ *
+ * USB transceiver driver for AB8500 chip
+ *
+ * Copyright (C) 2010 ST-Ericsson AB
+ * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/otg.h>
+#include <linux/slab.h>
+#include <linux/notifier.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mfd/abx500.h>
+#include <linux/mfd/abx500/ab8500.h>
+
+#define AB8500_MAIN_WD_CTRL_REG 0x01
+#define AB8500_USB_LINE_STAT_REG 0x80
+#define AB8500_USB_PHY_CTRL_REG 0x8A
+
+#define AB8500_BIT_OTG_STAT_ID (1 << 0)
+#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
+#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
+#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)
+#define AB8500_BIT_WD_CTRL_KICK (1 << 1)
+
+#define AB8500_V1x_LINK_STAT_WAIT (HZ/10)
+#define AB8500_WD_KICK_DELAY_US 100 /* usec */
+#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */
+#define AB8500_WD_V10_DISABLE_DELAY_MS 100 /* ms */
+
+/* Usb line status register */
+enum ab8500_usb_link_status {
+ USB_LINK_NOT_CONFIGURED = 0,
+ USB_LINK_STD_HOST_NC,
+ USB_LINK_STD_HOST_C_NS,
+ USB_LINK_STD_HOST_C_S,
+ USB_LINK_HOST_CHG_NM,
+ USB_LINK_HOST_CHG_HS,
+ USB_LINK_HOST_CHG_HS_CHIRP,
+ USB_LINK_DEDICATED_CHG,
+ USB_LINK_ACA_RID_A,
+ USB_LINK_ACA_RID_B,
+ USB_LINK_ACA_RID_C_NM,
+ USB_LINK_ACA_RID_C_HS,
+ USB_LINK_ACA_RID_C_HS_CHIRP,
+ USB_LINK_HM_IDGND,
+ USB_LINK_RESERVED,
+ USB_LINK_NOT_VALID_LINK
+};
+
+struct ab8500_usb {
+ struct usb_phy phy;
+ struct device *dev;
+ int irq_num_id_rise;
+ int irq_num_id_fall;
+ int irq_num_vbus_rise;
+ int irq_num_vbus_fall;
+ int irq_num_link_status;
+ unsigned vbus_draw;
+ struct delayed_work dwork;
+ struct work_struct phy_dis_work;
+ unsigned long link_status_wait;
+ int rev;
+};
+
+static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
+{
+ return container_of(x, struct ab8500_usb, phy);
+}
+
+static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
+{
+ abx500_set_register_interruptible(ab->dev,
+ AB8500_SYS_CTRL2_BLOCK,
+ AB8500_MAIN_WD_CTRL_REG,
+ AB8500_BIT_WD_CTRL_ENABLE);
+
+ udelay(AB8500_WD_KICK_DELAY_US);
+
+ abx500_set_register_interruptible(ab->dev,
+ AB8500_SYS_CTRL2_BLOCK,
+ AB8500_MAIN_WD_CTRL_REG,
+ (AB8500_BIT_WD_CTRL_ENABLE
+ | AB8500_BIT_WD_CTRL_KICK));
+
+ if (ab->rev > 0x10) /* v1.1 v2.0 */
+ udelay(AB8500_WD_V11_DISABLE_DELAY_US);
+ else /* v1.0 */
+ msleep(AB8500_WD_V10_DISABLE_DELAY_MS);
+
+ abx500_set_register_interruptible(ab->dev,
+ AB8500_SYS_CTRL2_BLOCK,
+ AB8500_MAIN_WD_CTRL_REG,
+ 0);
+}
+
+static void ab8500_usb_phy_ctrl(struct ab8500_usb *ab, bool sel_host,
+ bool enable)
+{
+ u8 ctrl_reg;
+ abx500_get_register_interruptible(ab->dev,
+ AB8500_USB,
+ AB8500_USB_PHY_CTRL_REG,
+ &ctrl_reg);
+ if (sel_host) {
+ if (enable)
+ ctrl_reg |= AB8500_BIT_PHY_CTRL_HOST_EN;
+ else
+ ctrl_reg &= ~AB8500_BIT_PHY_CTRL_HOST_EN;
+ } else {
+ if (enable)
+ ctrl_reg |= AB8500_BIT_PHY_CTRL_DEVICE_EN;
+ else
+ ctrl_reg &= ~AB8500_BIT_PHY_CTRL_DEVICE_EN;
+ }
+
+ abx500_set_register_interruptible(ab->dev,
+ AB8500_USB,
+ AB8500_USB_PHY_CTRL_REG,
+ ctrl_reg);
+
+ /* Needed to enable the phy.*/
+ if (enable)
+ ab8500_usb_wd_workaround(ab);
+}
+
+#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_ctrl(ab, true, true)
+#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_ctrl(ab, true, false)
+#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_ctrl(ab, false, true)
+#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_ctrl(ab, false, false)
+
+static int ab8500_usb_link_status_update(struct ab8500_usb *ab)
+{
+ u8 reg;
+ enum ab8500_usb_link_status lsts;
+ void *v = NULL;
+ enum usb_phy_events event;
+
+ abx500_get_register_interruptible(ab->dev,
+ AB8500_USB,
+ AB8500_USB_LINE_STAT_REG,
+ ®);
+
+ lsts = (reg >> 3) & 0x0F;
+
+ switch (lsts) {
+ case USB_LINK_NOT_CONFIGURED:
+ case USB_LINK_RESERVED:
+ case USB_LINK_NOT_VALID_LINK:
+ /* TODO: Disable regulators. */
+ ab8500_usb_host_phy_dis(ab);
+ ab8500_usb_peri_phy_dis(ab);
+ ab->phy.state = OTG_STATE_B_IDLE;
+ ab->phy.otg->default_a = false;
+ ab->vbus_draw = 0;
+ event = USB_EVENT_NONE;
+ break;
+
+ case USB_LINK_STD_HOST_NC:
+ case USB_LINK_STD_HOST_C_NS:
+ case USB_LINK_STD_HOST_C_S:
+ case USB_LINK_HOST_CHG_NM:
+ case USB_LINK_HOST_CHG_HS:
+ case USB_LINK_HOST_CHG_HS_CHIRP:
+ if (ab->phy.otg->gadget) {
+ /* TODO: Enable regulators. */
+ ab8500_usb_peri_phy_en(ab);
+ v = ab->phy.otg->gadget;
+ }
+ event = USB_EVENT_VBUS;
+ break;
+
+ case USB_LINK_HM_IDGND:
+ if (ab->phy.otg->host) {
+ /* TODO: Enable regulators. */
+ ab8500_usb_host_phy_en(ab);
+ v = ab->phy.otg->host;
+ }
+ ab->phy.state = OTG_STATE_A_IDLE;
+ ab->phy.otg->default_a = true;
+ event = USB_EVENT_ID;
+ break;
+
+ case USB_LINK_ACA_RID_A:
+ case USB_LINK_ACA_RID_B:
+ /* TODO */
+ case USB_LINK_ACA_RID_C_NM:
+ case USB_LINK_ACA_RID_C_HS:
+ case USB_LINK_ACA_RID_C_HS_CHIRP:
+ case USB_LINK_DEDICATED_CHG:
+ /* TODO: vbus_draw */
+ event = USB_EVENT_CHARGER;
+ break;
+ }
+
+ atomic_notifier_call_chain(&ab->phy.notifier, event, v);
+
+ return 0;
+}
+
+static void ab8500_usb_delayed_work(struct work_struct *work)
+{
+ struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
+ dwork.work);
+
+ ab8500_usb_link_status_update(ab);
+}
+
+static irqreturn_t ab8500_usb_v1x_common_irq(int irq, void *data)
+{
+ struct ab8500_usb *ab = (struct ab8500_usb *) data;
+
+ /* Wait for link status to become stable. */
+ schedule_delayed_work(&ab->dwork, ab->link_status_wait);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ab8500_usb_v1x_vbus_fall_irq(int irq, void *data)
+{
+ struct ab8500_usb *ab = (struct ab8500_usb *) data;
+
+ /* Link status will not be updated till phy is disabled. */
+ ab8500_usb_peri_phy_dis(ab);
+
+ /* Wait for link status to become stable. */
+ schedule_delayed_work(&ab->dwork, ab->link_status_wait);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ab8500_usb_v20_irq(int irq, void *data)
+{
+ struct ab8500_usb *ab = (struct ab8500_usb *) data;
+
+ ab8500_usb_link_status_update(ab);
+
+ return IRQ_HANDLED;
+}
+
+static void ab8500_usb_phy_disable_work(struct work_struct *work)
+{
+ struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
+ phy_dis_work);
+
+ if (!ab->phy.otg->host)
+ ab8500_usb_host_phy_dis(ab);
+
+ if (!ab->phy.otg->gadget)
+ ab8500_usb_peri_phy_dis(ab);
+}
+
+static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
+{
+ struct ab8500_usb *ab;
+
+ if (!phy)
+ return -ENODEV;
+
+ ab = phy_to_ab(phy);
+
+ ab->vbus_draw = mA;
+
+ if (mA)
+ atomic_notifier_call_chain(&ab->phy.notifier,
+ USB_EVENT_ENUMERATED, ab->phy.otg->gadget);
+ return 0;
+}
+
+/* TODO: Implement some way for charging or other drivers to read
+ * ab->vbus_draw.
+ */
+
+static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
+{
+ /* TODO */
+ return 0;
+}
+
+static int ab8500_usb_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct ab8500_usb *ab;
+
+ if (!otg)
+ return -ENODEV;
+
+ ab = phy_to_ab(otg->phy);
+
+ /* Some drivers call this function in atomic context.
+ * Do not update ab8500 registers directly till this
+ * is fixed.
+ */
+
+ if (!gadget) {
+ /* TODO: Disable regulators. */
+ otg->gadget = NULL;
+ schedule_work(&ab->phy_dis_work);
+ } else {
+ otg->gadget = gadget;
+ otg->phy->state = OTG_STATE_B_IDLE;
+
+ /* Phy will not be enabled if cable is already
+ * plugged-in. Schedule to enable phy.
+ * Use same delay to avoid any race condition.
+ */
+ schedule_delayed_work(&ab->dwork, ab->link_status_wait);
+ }
+
+ return 0;
+}
+
+static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct ab8500_usb *ab;
+
+ if (!otg)
+ return -ENODEV;
+
+ ab = phy_to_ab(otg->phy);
+
+ /* Some drivers call this function in atomic context.
+ * Do not update ab8500 registers directly till this
+ * is fixed.
+ */
+
+ if (!host) {
+ /* TODO: Disable regulators. */
+ otg->host = NULL;
+ schedule_work(&ab->phy_dis_work);
+ } else {
+ otg->host = host;
+ /* Phy will not be enabled if cable is already
+ * plugged-in. Schedule to enable phy.
+ * Use same delay to avoid any race condition.
+ */
+ schedule_delayed_work(&ab->dwork, ab->link_status_wait);
+ }
+
+ return 0;
+}
+
+static void ab8500_usb_irq_free(struct ab8500_usb *ab)
+{
+ if (ab->rev < 0x20) {
+ free_irq(ab->irq_num_id_rise, ab);
+ free_irq(ab->irq_num_id_fall, ab);
+ free_irq(ab->irq_num_vbus_rise, ab);
+ free_irq(ab->irq_num_vbus_fall, ab);
+ } else {
+ free_irq(ab->irq_num_link_status, ab);
+ }
+}
+
+static int ab8500_usb_v1x_res_setup(struct platform_device *pdev,
+ struct ab8500_usb *ab)
+{
+ int err;
+
+ ab->irq_num_id_rise = platform_get_irq_byname(pdev, "ID_WAKEUP_R");
+ if (ab->irq_num_id_rise < 0) {
+ dev_err(&pdev->dev, "ID rise irq not found\n");
+ return ab->irq_num_id_rise;
+ }
+ err = request_threaded_irq(ab->irq_num_id_rise, NULL,
+ ab8500_usb_v1x_common_irq,
+ IRQF_NO_SUSPEND | IRQF_SHARED,
+ "usb-id-rise", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for ID rise irq\n");
+ goto fail0;
+ }
+
+ ab->irq_num_id_fall = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
+ if (ab->irq_num_id_fall < 0) {
+ dev_err(&pdev->dev, "ID fall irq not found\n");
+ return ab->irq_num_id_fall;
+ }
+ err = request_threaded_irq(ab->irq_num_id_fall, NULL,
+ ab8500_usb_v1x_common_irq,
+ IRQF_NO_SUSPEND | IRQF_SHARED,
+ "usb-id-fall", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for ID fall irq\n");
+ goto fail1;
+ }
+
+ ab->irq_num_vbus_rise = platform_get_irq_byname(pdev, "VBUS_DET_R");
+ if (ab->irq_num_vbus_rise < 0) {
+ dev_err(&pdev->dev, "VBUS rise irq not found\n");
+ return ab->irq_num_vbus_rise;
+ }
+ err = request_threaded_irq(ab->irq_num_vbus_rise, NULL,
+ ab8500_usb_v1x_common_irq,
+ IRQF_NO_SUSPEND | IRQF_SHARED,
+ "usb-vbus-rise", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for Vbus rise irq\n");
+ goto fail2;
+ }
+
+ ab->irq_num_vbus_fall = platform_get_irq_byname(pdev, "VBUS_DET_F");
+ if (ab->irq_num_vbus_fall < 0) {
+ dev_err(&pdev->dev, "VBUS fall irq not found\n");
+ return ab->irq_num_vbus_fall;
+ }
+ err = request_threaded_irq(ab->irq_num_vbus_fall, NULL,
+ ab8500_usb_v1x_vbus_fall_irq,
+ IRQF_NO_SUSPEND | IRQF_SHARED,
+ "usb-vbus-fall", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
+ goto fail3;
+ }
+
+ return 0;
+fail3:
+ free_irq(ab->irq_num_vbus_rise, ab);
+fail2:
+ free_irq(ab->irq_num_id_fall, ab);
+fail1:
+ free_irq(ab->irq_num_id_rise, ab);
+fail0:
+ return err;
+}
+
+static int ab8500_usb_v2_res_setup(struct platform_device *pdev,
+ struct ab8500_usb *ab)
+{
+ int err;
+
+ ab->irq_num_link_status = platform_get_irq_byname(pdev,
+ "USB_LINK_STATUS");
+ if (ab->irq_num_link_status < 0) {
+ dev_err(&pdev->dev, "Link status irq not found\n");
+ return ab->irq_num_link_status;
+ }
+
+ err = request_threaded_irq(ab->irq_num_link_status, NULL,
+ ab8500_usb_v20_irq,
+ IRQF_NO_SUSPEND | IRQF_SHARED,
+ "usb-link-status", ab);
+ if (err < 0) {
+ dev_err(ab->dev,
+ "request_irq failed for link status irq\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static int ab8500_usb_probe(struct platform_device *pdev)
+{
+ struct ab8500_usb *ab;
+ struct usb_otg *otg;
+ int err;
+ int rev;
+
+ rev = abx500_get_chip_id(&pdev->dev);
+ if (rev < 0) {
+ dev_err(&pdev->dev, "Chip id read failed\n");
+ return rev;
+ } else if (rev < 0x10) {
+ dev_err(&pdev->dev, "Unsupported AB8500 chip\n");
+ return -ENODEV;
+ }
+
+ ab = kzalloc(sizeof *ab, GFP_KERNEL);
+ if (!ab)
+ return -ENOMEM;
+
+ otg = kzalloc(sizeof *otg, GFP_KERNEL);
+ if (!otg) {
+ kfree(ab);
+ return -ENOMEM;
+ }
+
+ ab->dev = &pdev->dev;
+ ab->rev = rev;
+ ab->phy.dev = ab->dev;
+ ab->phy.otg = otg;
+ ab->phy.label = "ab8500";
+ ab->phy.set_suspend = ab8500_usb_set_suspend;
+ ab->phy.set_power = ab8500_usb_set_power;
+ ab->phy.state = OTG_STATE_UNDEFINED;
+
+ otg->phy = &ab->phy;
+ otg->set_host = ab8500_usb_set_host;
+ otg->set_peripheral = ab8500_usb_set_peripheral;
+
+ platform_set_drvdata(pdev, ab);
+
+ ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier);
+
+ /* v1: Wait for link status to become stable.
+ * all: Updates form set_host and set_peripheral as they are atomic.
+ */
+ INIT_DELAYED_WORK(&ab->dwork, ab8500_usb_delayed_work);
+
+ /* all: Disable phy when called from set_host and set_peripheral */
+ INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);
+
+ if (ab->rev < 0x20) {
+ err = ab8500_usb_v1x_res_setup(pdev, ab);
+ ab->link_status_wait = AB8500_V1x_LINK_STAT_WAIT;
+ } else {
+ err = ab8500_usb_v2_res_setup(pdev, ab);
+ }
+
+ if (err < 0)
+ goto fail0;
+
+ err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
+ if (err) {
+ dev_err(&pdev->dev, "Can't register transceiver\n");
+ goto fail1;
+ }
+
+ dev_info(&pdev->dev, "AB8500 usb driver initialized\n");
+
+ return 0;
+fail1:
+ ab8500_usb_irq_free(ab);
+fail0:
+ kfree(otg);
+ kfree(ab);
+ return err;
+}
+
+static int ab8500_usb_remove(struct platform_device *pdev)
+{
+ struct ab8500_usb *ab = platform_get_drvdata(pdev);
+
+ ab8500_usb_irq_free(ab);
+
+ cancel_delayed_work_sync(&ab->dwork);
+
+ cancel_work_sync(&ab->phy_dis_work);
+
+ usb_remove_phy(&ab->phy);
+
+ ab8500_usb_host_phy_dis(ab);
+ ab8500_usb_peri_phy_dis(ab);
+
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(ab->phy.otg);
+ kfree(ab);
+
+ return 0;
+}
+
+static struct platform_driver ab8500_usb_driver = {
+ .probe = ab8500_usb_probe,
+ .remove = ab8500_usb_remove,
+ .driver = {
+ .name = "ab8500-usb",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init ab8500_usb_init(void)
+{
+ return platform_driver_register(&ab8500_usb_driver);
+}
+subsys_initcall(ab8500_usb_init);
+
+static void __exit ab8500_usb_exit(void)
+{
+ platform_driver_unregister(&ab8500_usb_driver);
+}
+module_exit(ab8500_usb_exit);
+
+MODULE_ALIAS("platform:ab8500_usb");
+MODULE_AUTHOR("ST-Ericsson AB");
+MODULE_DESCRIPTION("AB8500 usb transceiver driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2007,2008 Freescale semiconductor, Inc.
+ *
+ * Author: Li Yang <LeoLi@freescale.com>
+ * Jerry Huang <Chang-Ming.Huang@freescale.com>
+ *
+ * Initialization based on code from Shlomi Gridish.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/timer.h>
+#include <linux/usb.h>
+#include <linux/device.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/workqueue.h>
+#include <linux/time.h>
+#include <linux/fsl_devices.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+
+#include <asm/unaligned.h>
+
+#include "fsl_otg.h"
+
+#define DRIVER_VERSION "Rev. 1.55"
+#define DRIVER_AUTHOR "Jerry Huang/Li Yang"
+#define DRIVER_DESC "Freescale USB OTG Transceiver Driver"
+#define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION
+
+static const char driver_name[] = "fsl-usb2-otg";
+
+const pm_message_t otg_suspend_state = {
+ .event = 1,
+};
+
+#define HA_DATA_PULSE
+
+static struct usb_dr_mmap *usb_dr_regs;
+static struct fsl_otg *fsl_otg_dev;
+static int srp_wait_done;
+
+/* FSM timers */
+struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr,
+ *b_ase0_brst_tmr, *b_se0_srp_tmr;
+
+/* Driver specific timers */
+struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr,
+ *b_srp_wait_tmr, *a_wait_enum_tmr;
+
+static struct list_head active_timers;
+
+static struct fsl_otg_config fsl_otg_initdata = {
+ .otg_port = 1,
+};
+
+#ifdef CONFIG_PPC32
+static u32 _fsl_readl_be(const unsigned __iomem *p)
+{
+ return in_be32(p);
+}
+
+static u32 _fsl_readl_le(const unsigned __iomem *p)
+{
+ return in_le32(p);
+}
+
+static void _fsl_writel_be(u32 v, unsigned __iomem *p)
+{
+ out_be32(p, v);
+}
+
+static void _fsl_writel_le(u32 v, unsigned __iomem *p)
+{
+ out_le32(p, v);
+}
+
+static u32 (*_fsl_readl)(const unsigned __iomem *p);
+static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
+
+#define fsl_readl(p) (*_fsl_readl)((p))
+#define fsl_writel(v, p) (*_fsl_writel)((v), (p))
+
+#else
+#define fsl_readl(addr) readl(addr)
+#define fsl_writel(val, addr) writel(val, addr)
+#endif /* CONFIG_PPC32 */
+
+/* Routines to access transceiver ULPI registers */
+u8 view_ulpi(u8 addr)
+{
+ u32 temp;
+
+ temp = 0x40000000 | (addr << 16);
+ fsl_writel(temp, &usb_dr_regs->ulpiview);
+ udelay(1000);
+ while (temp & 0x40)
+ temp = fsl_readl(&usb_dr_regs->ulpiview);
+ return (le32_to_cpu(temp) & 0x0000ff00) >> 8;
+}
+
+int write_ulpi(u8 addr, u8 data)
+{
+ u32 temp;
+
+ temp = 0x60000000 | (addr << 16) | data;
+ fsl_writel(temp, &usb_dr_regs->ulpiview);
+ return 0;
+}
+
+/* -------------------------------------------------------------*/
+/* Operations that will be called from OTG Finite State Machine */
+
+/* Charge vbus for vbus pulsing in SRP */
+void fsl_otg_chrg_vbus(int on)
+{
+ u32 tmp;
+
+ tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
+
+ if (on)
+ /* stop discharging, start charging */
+ tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) |
+ OTGSC_CTRL_VBUS_CHARGE;
+ else
+ /* stop charging */
+ tmp &= ~OTGSC_CTRL_VBUS_CHARGE;
+
+ fsl_writel(tmp, &usb_dr_regs->otgsc);
+}
+
+/* Discharge vbus through a resistor to ground */
+void fsl_otg_dischrg_vbus(int on)
+{
+ u32 tmp;
+
+ tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
+
+ if (on)
+ /* stop charging, start discharging */
+ tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) |
+ OTGSC_CTRL_VBUS_DISCHARGE;
+ else
+ /* stop discharging */
+ tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE;
+
+ fsl_writel(tmp, &usb_dr_regs->otgsc);
+}
+
+/* A-device driver vbus, controlled through PP bit in PORTSC */
+void fsl_otg_drv_vbus(int on)
+{
+ u32 tmp;
+
+ if (on) {
+ tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS;
+ fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc);
+ } else {
+ tmp = fsl_readl(&usb_dr_regs->portsc) &
+ ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER;
+ fsl_writel(tmp, &usb_dr_regs->portsc);
+ }
+}
+
+/*
+ * Pull-up D+, signalling connect by periperal. Also used in
+ * data-line pulsing in SRP
+ */
+void fsl_otg_loc_conn(int on)
+{
+ u32 tmp;
+
+ tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
+
+ if (on)
+ tmp |= OTGSC_CTRL_DATA_PULSING;
+ else
+ tmp &= ~OTGSC_CTRL_DATA_PULSING;
+
+ fsl_writel(tmp, &usb_dr_regs->otgsc);
+}
+
+/*
+ * Generate SOF by host. This is controlled through suspend/resume the
+ * port. In host mode, controller will automatically send SOF.
+ * Suspend will block the data on the port.
+ */
+void fsl_otg_loc_sof(int on)
+{
+ u32 tmp;
+
+ tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS;
+ if (on)
+ tmp |= PORTSC_PORT_FORCE_RESUME;
+ else
+ tmp |= PORTSC_PORT_SUSPEND;
+
+ fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc);
+
+}
+
+/* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */
+void fsl_otg_start_pulse(void)
+{
+ u32 tmp;
+
+ srp_wait_done = 0;
+#ifdef HA_DATA_PULSE
+ tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
+ tmp |= OTGSC_HA_DATA_PULSE;
+ fsl_writel(tmp, &usb_dr_regs->otgsc);
+#else
+ fsl_otg_loc_conn(1);
+#endif
+
+ fsl_otg_add_timer(b_data_pulse_tmr);
+}
+
+void b_data_pulse_end(unsigned long foo)
+{
+#ifdef HA_DATA_PULSE
+#else
+ fsl_otg_loc_conn(0);
+#endif
+
+ /* Do VBUS pulse after data pulse */
+ fsl_otg_pulse_vbus();
+}
+
+void fsl_otg_pulse_vbus(void)
+{
+ srp_wait_done = 0;
+ fsl_otg_chrg_vbus(1);
+ /* start the timer to end vbus charge */
+ fsl_otg_add_timer(b_vbus_pulse_tmr);
+}
+
+void b_vbus_pulse_end(unsigned long foo)
+{
+ fsl_otg_chrg_vbus(0);
+
+ /*
+ * As USB3300 using the same a_sess_vld and b_sess_vld voltage
+ * we need to discharge the bus for a while to distinguish
+ * residual voltage of vbus pulsing and A device pull up
+ */
+ fsl_otg_dischrg_vbus(1);
+ fsl_otg_add_timer(b_srp_wait_tmr);
+}
+
+void b_srp_end(unsigned long foo)
+{
+ fsl_otg_dischrg_vbus(0);
+ srp_wait_done = 1;
+
+ if ((fsl_otg_dev->phy.state == OTG_STATE_B_SRP_INIT) &&
+ fsl_otg_dev->fsm.b_sess_vld)
+ fsl_otg_dev->fsm.b_srp_done = 1;
+}
+
+/*
+ * Workaround for a_host suspending too fast. When a_bus_req=0,
+ * a_host will start by SRP. It needs to set b_hnp_enable before
+ * actually suspending to start HNP
+ */
+void a_wait_enum(unsigned long foo)
+{
+ VDBG("a_wait_enum timeout\n");
+ if (!fsl_otg_dev->phy.otg->host->b_hnp_enable)
+ fsl_otg_add_timer(a_wait_enum_tmr);
+ else
+ otg_statemachine(&fsl_otg_dev->fsm);
+}
+
+/* The timeout callback function to set time out bit */
+void set_tmout(unsigned long indicator)
+{
+ *(int *)indicator = 1;
+}
+
+/* Initialize timers */
+int fsl_otg_init_timers(struct otg_fsm *fsm)
+{
+ /* FSM used timers */
+ a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
+ (unsigned long)&fsm->a_wait_vrise_tmout);
+ if (!a_wait_vrise_tmr)
+ return -ENOMEM;
+
+ a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON,
+ (unsigned long)&fsm->a_wait_bcon_tmout);
+ if (!a_wait_bcon_tmr)
+ return -ENOMEM;
+
+ a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
+ (unsigned long)&fsm->a_aidl_bdis_tmout);
+ if (!a_aidl_bdis_tmr)
+ return -ENOMEM;
+
+ b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST,
+ (unsigned long)&fsm->b_ase0_brst_tmout);
+ if (!b_ase0_brst_tmr)
+ return -ENOMEM;
+
+ b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
+ (unsigned long)&fsm->b_se0_srp);
+ if (!b_se0_srp_tmr)
+ return -ENOMEM;
+
+ b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL,
+ (unsigned long)&fsm->b_srp_done);
+ if (!b_srp_fail_tmr)
+ return -ENOMEM;
+
+ a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10,
+ (unsigned long)&fsm);
+ if (!a_wait_enum_tmr)
+ return -ENOMEM;
+
+ /* device driver used timers */
+ b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0);
+ if (!b_srp_wait_tmr)
+ return -ENOMEM;
+
+ b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end,
+ TB_DATA_PLS, 0);
+ if (!b_data_pulse_tmr)
+ return -ENOMEM;
+
+ b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end,
+ TB_VBUS_PLS, 0);
+ if (!b_vbus_pulse_tmr)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/* Uninitialize timers */
+void fsl_otg_uninit_timers(void)
+{
+ /* FSM used timers */
+ kfree(a_wait_vrise_tmr);
+ kfree(a_wait_bcon_tmr);
+ kfree(a_aidl_bdis_tmr);
+ kfree(b_ase0_brst_tmr);
+ kfree(b_se0_srp_tmr);
+ kfree(b_srp_fail_tmr);
+ kfree(a_wait_enum_tmr);
+
+ /* device driver used timers */
+ kfree(b_srp_wait_tmr);
+ kfree(b_data_pulse_tmr);
+ kfree(b_vbus_pulse_tmr);
+}
+
+/* Add timer to timer list */
+void fsl_otg_add_timer(void *gtimer)
+{
+ struct fsl_otg_timer *timer = gtimer;
+ struct fsl_otg_timer *tmp_timer;
+
+ /*
+ * Check if the timer is already in the active list,
+ * if so update timer count
+ */
+ list_for_each_entry(tmp_timer, &active_timers, list)
+ if (tmp_timer == timer) {
+ timer->count = timer->expires;
+ return;
+ }
+ timer->count = timer->expires;
+ list_add_tail(&timer->list, &active_timers);
+}
+
+/* Remove timer from the timer list; clear timeout status */
+void fsl_otg_del_timer(void *gtimer)
+{
+ struct fsl_otg_timer *timer = gtimer;
+ struct fsl_otg_timer *tmp_timer, *del_tmp;
+
+ list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
+ if (tmp_timer == timer)
+ list_del(&timer->list);
+}
+
+/*
+ * Reduce timer count by 1, and find timeout conditions.
+ * Called by fsl_otg 1ms timer interrupt
+ */
+int fsl_otg_tick_timer(void)
+{
+ struct fsl_otg_timer *tmp_timer, *del_tmp;
+ int expired = 0;
+
+ list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
+ tmp_timer->count--;
+ /* check if timer expires */
+ if (!tmp_timer->count) {
+ list_del(&tmp_timer->list);
+ tmp_timer->function(tmp_timer->data);
+ expired = 1;
+ }
+ }
+
+ return expired;
+}
+
+/* Reset controller, not reset the bus */
+void otg_reset_controller(void)
+{
+ u32 command;
+
+ command = fsl_readl(&usb_dr_regs->usbcmd);
+ command |= (1 << 1);
+ fsl_writel(command, &usb_dr_regs->usbcmd);
+ while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1))
+ ;
+}
+
+/* Call suspend/resume routines in host driver */
+int fsl_otg_start_host(struct otg_fsm *fsm, int on)
+{
+ struct usb_otg *otg = fsm->otg;
+ struct device *dev;
+ struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
+ u32 retval = 0;
+
+ if (!otg->host)
+ return -ENODEV;
+ dev = otg->host->controller;
+
+ /*
+ * Update a_vbus_vld state as a_vbus_vld int is disabled
+ * in device mode
+ */
+ fsm->a_vbus_vld =
+ !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID);
+ if (on) {
+ /* start fsl usb host controller */
+ if (otg_dev->host_working)
+ goto end;
+ else {
+ otg_reset_controller();
+ VDBG("host on......\n");
+ if (dev->driver->pm && dev->driver->pm->resume) {
+ retval = dev->driver->pm->resume(dev);
+ if (fsm->id) {
+ /* default-b */
+ fsl_otg_drv_vbus(1);
+ /*
+ * Workaround: b_host can't driver
+ * vbus, but PP in PORTSC needs to
+ * be 1 for host to work.
+ * So we set drv_vbus bit in
+ * transceiver to 0 thru ULPI.
+ */
+ write_ulpi(0x0c, 0x20);
+ }
+ }
+
+ otg_dev->host_working = 1;
+ }
+ } else {
+ /* stop fsl usb host controller */
+ if (!otg_dev->host_working)
+ goto end;
+ else {
+ VDBG("host off......\n");
+ if (dev && dev->driver) {
+ if (dev->driver->pm && dev->driver->pm->suspend)
+ retval = dev->driver->pm->suspend(dev);
+ if (fsm->id)
+ /* default-b */
+ fsl_otg_drv_vbus(0);
+ }
+ otg_dev->host_working = 0;
+ }
+ }
+end:
+ return retval;
+}
+
+/*
+ * Call suspend and resume function in udc driver
+ * to stop and start udc driver.
+ */
+int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
+{
+ struct usb_otg *otg = fsm->otg;
+ struct device *dev;
+
+ if (!otg->gadget || !otg->gadget->dev.parent)
+ return -ENODEV;
+
+ VDBG("gadget %s\n", on ? "on" : "off");
+ dev = otg->gadget->dev.parent;
+
+ if (on) {
+ if (dev->driver->resume)
+ dev->driver->resume(dev);
+ } else {
+ if (dev->driver->suspend)
+ dev->driver->suspend(dev, otg_suspend_state);
+ }
+
+ return 0;
+}
+
+/*
+ * Called by initialization code of host driver. Register host controller
+ * to the OTG. Suspend host for OTG role detection.
+ */
+static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct fsl_otg *otg_dev;
+
+ if (!otg)
+ return -ENODEV;
+
+ otg_dev = container_of(otg->phy, struct fsl_otg, phy);
+ if (otg_dev != fsl_otg_dev)
+ return -ENODEV;
+
+ otg->host = host;
+
+ otg_dev->fsm.a_bus_drop = 0;
+ otg_dev->fsm.a_bus_req = 1;
+
+ if (host) {
+ VDBG("host off......\n");
+
+ otg->host->otg_port = fsl_otg_initdata.otg_port;
+ otg->host->is_b_host = otg_dev->fsm.id;
+ /*
+ * must leave time for khubd to finish its thing
+ * before yanking the host driver out from under it,
+ * so suspend the host after a short delay.
+ */
+ otg_dev->host_working = 1;
+ schedule_delayed_work(&otg_dev->otg_event, 100);
+ return 0;
+ } else {
+ /* host driver going away */
+ if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) &
+ OTGSC_STS_USB_ID)) {
+ /* Mini-A cable connected */
+ struct otg_fsm *fsm = &otg_dev->fsm;
+
+ otg->phy->state = OTG_STATE_UNDEFINED;
+ fsm->protocol = PROTO_UNDEF;
+ }
+ }
+
+ otg_dev->host_working = 0;
+
+ otg_statemachine(&otg_dev->fsm);
+
+ return 0;
+}
+
+/* Called by initialization code of udc. Register udc to OTG. */
+static int fsl_otg_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct fsl_otg *otg_dev;
+
+ if (!otg)
+ return -ENODEV;
+
+ otg_dev = container_of(otg->phy, struct fsl_otg, phy);
+ VDBG("otg_dev 0x%x\n", (int)otg_dev);
+ VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
+ if (otg_dev != fsl_otg_dev)
+ return -ENODEV;
+
+ if (!gadget) {
+ if (!otg->default_a)
+ otg->gadget->ops->vbus_draw(otg->gadget, 0);
+ usb_gadget_vbus_disconnect(otg->gadget);
+ otg->gadget = 0;
+ otg_dev->fsm.b_bus_req = 0;
+ otg_statemachine(&otg_dev->fsm);
+ return 0;
+ }
+
+ otg->gadget = gadget;
+ otg->gadget->is_a_peripheral = !otg_dev->fsm.id;
+
+ otg_dev->fsm.b_bus_req = 1;
+
+ /* start the gadget right away if the ID pin says Mini-B */
+ DBG("ID pin=%d\n", otg_dev->fsm.id);
+ if (otg_dev->fsm.id == 1) {
+ fsl_otg_start_host(&otg_dev->fsm, 0);
+ otg_drv_vbus(&otg_dev->fsm, 0);
+ fsl_otg_start_gadget(&otg_dev->fsm, 1);
+ }
+
+ return 0;
+}
+
+/* Set OTG port power, only for B-device */
+static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA)
+{
+ if (!fsl_otg_dev)
+ return -ENODEV;
+ if (phy->state == OTG_STATE_B_PERIPHERAL)
+ pr_info("FSL OTG: Draw %d mA\n", mA);
+
+ return 0;
+}
+
+/*
+ * Delayed pin detect interrupt processing.
+ *
+ * When the Mini-A cable is disconnected from the board,
+ * the pin-detect interrupt happens before the disconnect
+ * interrupts for the connected device(s). In order to
+ * process the disconnect interrupt(s) prior to switching
+ * roles, the pin-detect interrupts are delayed, and handled
+ * by this routine.
+ */
+static void fsl_otg_event(struct work_struct *work)
+{
+ struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work);
+ struct otg_fsm *fsm = &og->fsm;
+
+ if (fsm->id) { /* switch to gadget */
+ fsl_otg_start_host(fsm, 0);
+ otg_drv_vbus(fsm, 0);
+ fsl_otg_start_gadget(fsm, 1);
+ }
+}
+
+/* B-device start SRP */
+static int fsl_otg_start_srp(struct usb_otg *otg)
+{
+ struct fsl_otg *otg_dev;
+
+ if (!otg || otg->phy->state != OTG_STATE_B_IDLE)
+ return -ENODEV;
+
+ otg_dev = container_of(otg->phy, struct fsl_otg, phy);
+ if (otg_dev != fsl_otg_dev)
+ return -ENODEV;
+
+ otg_dev->fsm.b_bus_req = 1;
+ otg_statemachine(&otg_dev->fsm);
+
+ return 0;
+}
+
+/* A_host suspend will call this function to start hnp */
+static int fsl_otg_start_hnp(struct usb_otg *otg)
+{
+ struct fsl_otg *otg_dev;
+
+ if (!otg)
+ return -ENODEV;
+
+ otg_dev = container_of(otg->phy, struct fsl_otg, phy);
+ if (otg_dev != fsl_otg_dev)
+ return -ENODEV;
+
+ DBG("start_hnp...n");
+
+ /* clear a_bus_req to enter a_suspend state */
+ otg_dev->fsm.a_bus_req = 0;
+ otg_statemachine(&otg_dev->fsm);
+
+ return 0;
+}
+
+/*
+ * Interrupt handler. OTG/host/peripheral share the same int line.
+ * OTG driver clears OTGSC interrupts and leaves USB interrupts
+ * intact. It needs to have knowledge of some USB interrupts
+ * such as port change.
+ */
+irqreturn_t fsl_otg_isr(int irq, void *dev_id)
+{
+ struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
+ struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
+ u32 otg_int_src, otg_sc;
+
+ otg_sc = fsl_readl(&usb_dr_regs->otgsc);
+ otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8);
+
+ /* Only clear otg interrupts */
+ fsl_writel(otg_sc, &usb_dr_regs->otgsc);
+
+ /*FIXME: ID change not generate when init to 0 */
+ fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
+ otg->default_a = (fsm->id == 0);
+
+ /* process OTG interrupts */
+ if (otg_int_src) {
+ if (otg_int_src & OTGSC_INTSTS_USB_ID) {
+ fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
+ otg->default_a = (fsm->id == 0);
+ /* clear conn information */
+ if (fsm->id)
+ fsm->b_conn = 0;
+ else
+ fsm->a_conn = 0;
+
+ if (otg->host)
+ otg->host->is_b_host = fsm->id;
+ if (otg->gadget)
+ otg->gadget->is_a_peripheral = !fsm->id;
+ VDBG("ID int (ID is %d)\n", fsm->id);
+
+ if (fsm->id) { /* switch to gadget */
+ schedule_delayed_work(
+ &((struct fsl_otg *)dev_id)->otg_event,
+ 100);
+ } else { /* switch to host */
+ cancel_delayed_work(&
+ ((struct fsl_otg *)dev_id)->
+ otg_event);
+ fsl_otg_start_gadget(fsm, 0);
+ otg_drv_vbus(fsm, 1);
+ fsl_otg_start_host(fsm, 1);
+ }
+ return IRQ_HANDLED;
+ }
+ }
+ return IRQ_NONE;
+}
+
+static struct otg_fsm_ops fsl_otg_ops = {
+ .chrg_vbus = fsl_otg_chrg_vbus,
+ .drv_vbus = fsl_otg_drv_vbus,
+ .loc_conn = fsl_otg_loc_conn,
+ .loc_sof = fsl_otg_loc_sof,
+ .start_pulse = fsl_otg_start_pulse,
+
+ .add_timer = fsl_otg_add_timer,
+ .del_timer = fsl_otg_del_timer,
+
+ .start_host = fsl_otg_start_host,
+ .start_gadget = fsl_otg_start_gadget,
+};
+
+/* Initialize the global variable fsl_otg_dev and request IRQ for OTG */
+static int fsl_otg_conf(struct platform_device *pdev)
+{
+ struct fsl_otg *fsl_otg_tc;
+ int status;
+
+ if (fsl_otg_dev)
+ return 0;
+
+ /* allocate space to fsl otg device */
+ fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL);
+ if (!fsl_otg_tc)
+ return -ENOMEM;
+
+ fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
+ if (!fsl_otg_tc->phy.otg) {
+ kfree(fsl_otg_tc);
+ return -ENOMEM;
+ }
+
+ INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event);
+
+ INIT_LIST_HEAD(&active_timers);
+ status = fsl_otg_init_timers(&fsl_otg_tc->fsm);
+ if (status) {
+ pr_info("Couldn't init OTG timers\n");
+ goto err;
+ }
+ spin_lock_init(&fsl_otg_tc->fsm.lock);
+
+ /* Set OTG state machine operations */
+ fsl_otg_tc->fsm.ops = &fsl_otg_ops;
+
+ /* initialize the otg structure */
+ fsl_otg_tc->phy.label = DRIVER_DESC;
+ fsl_otg_tc->phy.set_power = fsl_otg_set_power;
+
+ fsl_otg_tc->phy.otg->phy = &fsl_otg_tc->phy;
+ fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host;
+ fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral;
+ fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp;
+ fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp;
+
+ fsl_otg_dev = fsl_otg_tc;
+
+ /* Store the otg transceiver */
+ status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
+ if (status) {
+ pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ fsl_otg_uninit_timers();
+ kfree(fsl_otg_tc->phy.otg);
+ kfree(fsl_otg_tc);
+ return status;
+}
+
+/* OTG Initialization */
+int usb_otg_start(struct platform_device *pdev)
+{
+ struct fsl_otg *p_otg;
+ struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2);
+ struct otg_fsm *fsm;
+ int status;
+ struct resource *res;
+ u32 temp;
+ struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+
+ p_otg = container_of(otg_trans, struct fsl_otg, phy);
+ fsm = &p_otg->fsm;
+
+ /* Initialize the state machine structure with default values */
+ SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED);
+ fsm->otg = p_otg->phy.otg;
+
+ /* We don't require predefined MEM/IRQ resource index */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENXIO;
+
+ /* We don't request_mem_region here to enable resource sharing
+ * with host/device */
+
+ usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap));
+ p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs;
+ pdata->regs = (void *)usb_dr_regs;
+
+ if (pdata->init && pdata->init(pdev) != 0)
+ return -EINVAL;
+
+ if (pdata->big_endian_mmio) {
+ _fsl_readl = _fsl_readl_be;
+ _fsl_writel = _fsl_writel_be;
+ } else {
+ _fsl_readl = _fsl_readl_le;
+ _fsl_writel = _fsl_writel_le;
+ }
+
+ /* request irq */
+ p_otg->irq = platform_get_irq(pdev, 0);
+ status = request_irq(p_otg->irq, fsl_otg_isr,
+ IRQF_SHARED, driver_name, p_otg);
+ if (status) {
+ dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n",
+ p_otg->irq, status);
+ iounmap(p_otg->dr_mem_map);
+ kfree(p_otg->phy.otg);
+ kfree(p_otg);
+ return status;
+ }
+
+ /* stop the controller */
+ temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
+ temp &= ~USB_CMD_RUN_STOP;
+ fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
+
+ /* reset the controller */
+ temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
+ temp |= USB_CMD_CTRL_RESET;
+ fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
+
+ /* wait reset completed */
+ while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET)
+ ;
+
+ /* configure the VBUSHS as IDLE(both host and device) */
+ temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0);
+ fsl_writel(temp, &p_otg->dr_mem_map->usbmode);
+
+ /* configure PHY interface */
+ temp = fsl_readl(&p_otg->dr_mem_map->portsc);
+ temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
+ switch (pdata->phy_mode) {
+ case FSL_USB2_PHY_ULPI:
+ temp |= PORTSC_PTS_ULPI;
+ break;
+ case FSL_USB2_PHY_UTMI_WIDE:
+ temp |= PORTSC_PTW_16BIT;
+ /* fall through */
+ case FSL_USB2_PHY_UTMI:
+ temp |= PORTSC_PTS_UTMI;
+ /* fall through */
+ default:
+ break;
+ }
+ fsl_writel(temp, &p_otg->dr_mem_map->portsc);
+
+ if (pdata->have_sysif_regs) {
+ /* configure control enable IO output, big endian register */
+ temp = __raw_readl(&p_otg->dr_mem_map->control);
+ temp |= USB_CTRL_IOENB;
+ __raw_writel(temp, &p_otg->dr_mem_map->control);
+ }
+
+ /* disable all interrupt and clear all OTGSC status */
+ temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
+ temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK;
+ temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
+ fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
+
+ /*
+ * The identification (id) input is FALSE when a Mini-A plug is inserted
+ * in the devices Mini-AB receptacle. Otherwise, this input is TRUE.
+ * Also: record initial state of ID pin
+ */
+ if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) {
+ p_otg->phy.state = OTG_STATE_UNDEFINED;
+ p_otg->fsm.id = 1;
+ } else {
+ p_otg->phy.state = OTG_STATE_A_IDLE;
+ p_otg->fsm.id = 0;
+ }
+
+ DBG("initial ID pin=%d\n", p_otg->fsm.id);
+
+ /* enable OTG ID pin interrupt */
+ temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
+ temp |= OTGSC_INTR_USB_ID_EN;
+ temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN);
+ fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
+
+ return 0;
+}
+
+/*
+ * state file in sysfs
+ */
+static int show_fsl_usb2_otg_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct otg_fsm *fsm = &fsl_otg_dev->fsm;
+ char *next = buf;
+ unsigned size = PAGE_SIZE;
+ unsigned long flags;
+ int t;
+
+ spin_lock_irqsave(&fsm->lock, flags);
+
+ /* basic driver infomation */
+ t = scnprintf(next, size,
+ DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n",
+ DRIVER_VERSION);
+ size -= t;
+ next += t;
+
+ /* Registers */
+ t = scnprintf(next, size,
+ "OTGSC: 0x%08x\n"
+ "PORTSC: 0x%08x\n"
+ "USBMODE: 0x%08x\n"
+ "USBCMD: 0x%08x\n"
+ "USBSTS: 0x%08x\n"
+ "USBINTR: 0x%08x\n",
+ fsl_readl(&usb_dr_regs->otgsc),
+ fsl_readl(&usb_dr_regs->portsc),
+ fsl_readl(&usb_dr_regs->usbmode),
+ fsl_readl(&usb_dr_regs->usbcmd),
+ fsl_readl(&usb_dr_regs->usbsts),
+ fsl_readl(&usb_dr_regs->usbintr));
+ size -= t;
+ next += t;
+
+ /* State */
+ t = scnprintf(next, size,
+ "OTG state: %s\n\n",
+ usb_otg_state_string(fsl_otg_dev->phy.state));
+ size -= t;
+ next += t;
+
+ /* State Machine Variables */
+ t = scnprintf(next, size,
+ "a_bus_req: %d\n"
+ "b_bus_req: %d\n"
+ "a_bus_resume: %d\n"
+ "a_bus_suspend: %d\n"
+ "a_conn: %d\n"
+ "a_sess_vld: %d\n"
+ "a_srp_det: %d\n"
+ "a_vbus_vld: %d\n"
+ "b_bus_resume: %d\n"
+ "b_bus_suspend: %d\n"
+ "b_conn: %d\n"
+ "b_se0_srp: %d\n"
+ "b_sess_end: %d\n"
+ "b_sess_vld: %d\n"
+ "id: %d\n",
+ fsm->a_bus_req,
+ fsm->b_bus_req,
+ fsm->a_bus_resume,
+ fsm->a_bus_suspend,
+ fsm->a_conn,
+ fsm->a_sess_vld,
+ fsm->a_srp_det,
+ fsm->a_vbus_vld,
+ fsm->b_bus_resume,
+ fsm->b_bus_suspend,
+ fsm->b_conn,
+ fsm->b_se0_srp,
+ fsm->b_sess_end,
+ fsm->b_sess_vld,
+ fsm->id);
+ size -= t;
+ next += t;
+
+ spin_unlock_irqrestore(&fsm->lock, flags);
+
+ return PAGE_SIZE - size;
+}
+
+static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL);
+
+
+/* Char driver interface to control some OTG input */
+
+/*
+ * Handle some ioctl command, such as get otg
+ * status and set host suspend
+ */
+static long fsl_otg_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ u32 retval = 0;
+
+ switch (cmd) {
+ case GET_OTG_STATUS:
+ retval = fsl_otg_dev->host_working;
+ break;
+
+ case SET_A_SUSPEND_REQ:
+ fsl_otg_dev->fsm.a_suspend_req = arg;
+ break;
+
+ case SET_A_BUS_DROP:
+ fsl_otg_dev->fsm.a_bus_drop = arg;
+ break;
+
+ case SET_A_BUS_REQ:
+ fsl_otg_dev->fsm.a_bus_req = arg;
+ break;
+
+ case SET_B_BUS_REQ:
+ fsl_otg_dev->fsm.b_bus_req = arg;
+ break;
+
+ default:
+ break;
+ }
+
+ otg_statemachine(&fsl_otg_dev->fsm);
+
+ return retval;
+}
+
+static int fsl_otg_open(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static int fsl_otg_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static const struct file_operations otg_fops = {
+ .owner = THIS_MODULE,
+ .llseek = NULL,
+ .read = NULL,
+ .write = NULL,
+ .unlocked_ioctl = fsl_otg_ioctl,
+ .open = fsl_otg_open,
+ .release = fsl_otg_release,
+};
+
+static int fsl_otg_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ if (!pdev->dev.platform_data)
+ return -ENODEV;
+
+ /* configure the OTG */
+ ret = fsl_otg_conf(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Couldn't configure OTG module\n");
+ return ret;
+ }
+
+ /* start OTG */
+ ret = usb_otg_start(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't init FSL OTG device\n");
+ return ret;
+ }
+
+ ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to register FSL OTG device\n");
+ return ret;
+ }
+
+ ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
+ if (ret)
+ dev_warn(&pdev->dev, "Can't register sysfs attribute\n");
+
+ return ret;
+}
+
+static int fsl_otg_remove(struct platform_device *pdev)
+{
+ struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+
+ usb_remove_phy(&fsl_otg_dev->phy);
+ free_irq(fsl_otg_dev->irq, fsl_otg_dev);
+
+ iounmap((void *)usb_dr_regs);
+
+ fsl_otg_uninit_timers();
+ kfree(fsl_otg_dev->phy.otg);
+ kfree(fsl_otg_dev);
+
+ device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
+
+ unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
+
+ if (pdata->exit)
+ pdata->exit(pdev);
+
+ return 0;
+}
+
+struct platform_driver fsl_otg_driver = {
+ .probe = fsl_otg_probe,
+ .remove = fsl_otg_remove,
+ .driver = {
+ .name = driver_name,
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(fsl_otg_driver);
+
+MODULE_DESCRIPTION(DRIVER_INFO);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL");
--- /dev/null
+/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "otg_fsm.h"
+#include <linux/usb/otg.h>
+#include <linux/ioctl.h>
+
+/* USB Command Register Bit Masks */
+#define USB_CMD_RUN_STOP (0x1<<0)
+#define USB_CMD_CTRL_RESET (0x1<<1)
+#define USB_CMD_PERIODIC_SCHEDULE_EN (0x1<<4)
+#define USB_CMD_ASYNC_SCHEDULE_EN (0x1<<5)
+#define USB_CMD_INT_AA_DOORBELL (0x1<<6)
+#define USB_CMD_ASP (0x3<<8)
+#define USB_CMD_ASYNC_SCH_PARK_EN (0x1<<11)
+#define USB_CMD_SUTW (0x1<<13)
+#define USB_CMD_ATDTW (0x1<<14)
+#define USB_CMD_ITC (0xFF<<16)
+
+/* bit 15,3,2 are frame list size */
+#define USB_CMD_FRAME_SIZE_1024 (0x0<<15 | 0x0<<2)
+#define USB_CMD_FRAME_SIZE_512 (0x0<<15 | 0x1<<2)
+#define USB_CMD_FRAME_SIZE_256 (0x0<<15 | 0x2<<2)
+#define USB_CMD_FRAME_SIZE_128 (0x0<<15 | 0x3<<2)
+#define USB_CMD_FRAME_SIZE_64 (0x1<<15 | 0x0<<2)
+#define USB_CMD_FRAME_SIZE_32 (0x1<<15 | 0x1<<2)
+#define USB_CMD_FRAME_SIZE_16 (0x1<<15 | 0x2<<2)
+#define USB_CMD_FRAME_SIZE_8 (0x1<<15 | 0x3<<2)
+
+/* bit 9-8 are async schedule park mode count */
+#define USB_CMD_ASP_00 (0x0<<8)
+#define USB_CMD_ASP_01 (0x1<<8)
+#define USB_CMD_ASP_10 (0x2<<8)
+#define USB_CMD_ASP_11 (0x3<<8)
+#define USB_CMD_ASP_BIT_POS (8)
+
+/* bit 23-16 are interrupt threshold control */
+#define USB_CMD_ITC_NO_THRESHOLD (0x00<<16)
+#define USB_CMD_ITC_1_MICRO_FRM (0x01<<16)
+#define USB_CMD_ITC_2_MICRO_FRM (0x02<<16)
+#define USB_CMD_ITC_4_MICRO_FRM (0x04<<16)
+#define USB_CMD_ITC_8_MICRO_FRM (0x08<<16)
+#define USB_CMD_ITC_16_MICRO_FRM (0x10<<16)
+#define USB_CMD_ITC_32_MICRO_FRM (0x20<<16)
+#define USB_CMD_ITC_64_MICRO_FRM (0x40<<16)
+#define USB_CMD_ITC_BIT_POS (16)
+
+/* USB Status Register Bit Masks */
+#define USB_STS_INT (0x1<<0)
+#define USB_STS_ERR (0x1<<1)
+#define USB_STS_PORT_CHANGE (0x1<<2)
+#define USB_STS_FRM_LST_ROLL (0x1<<3)
+#define USB_STS_SYS_ERR (0x1<<4)
+#define USB_STS_IAA (0x1<<5)
+#define USB_STS_RESET_RECEIVED (0x1<<6)
+#define USB_STS_SOF (0x1<<7)
+#define USB_STS_DCSUSPEND (0x1<<8)
+#define USB_STS_HC_HALTED (0x1<<12)
+#define USB_STS_RCL (0x1<<13)
+#define USB_STS_PERIODIC_SCHEDULE (0x1<<14)
+#define USB_STS_ASYNC_SCHEDULE (0x1<<15)
+
+/* USB Interrupt Enable Register Bit Masks */
+#define USB_INTR_INT_EN (0x1<<0)
+#define USB_INTR_ERR_INT_EN (0x1<<1)
+#define USB_INTR_PC_DETECT_EN (0x1<<2)
+#define USB_INTR_FRM_LST_ROLL_EN (0x1<<3)
+#define USB_INTR_SYS_ERR_EN (0x1<<4)
+#define USB_INTR_ASYN_ADV_EN (0x1<<5)
+#define USB_INTR_RESET_EN (0x1<<6)
+#define USB_INTR_SOF_EN (0x1<<7)
+#define USB_INTR_DEVICE_SUSPEND (0x1<<8)
+
+/* Device Address bit masks */
+#define USB_DEVICE_ADDRESS_MASK (0x7F<<25)
+#define USB_DEVICE_ADDRESS_BIT_POS (25)
+/* PORTSC Register Bit Masks,Only one PORT in OTG mode*/
+#define PORTSC_CURRENT_CONNECT_STATUS (0x1<<0)
+#define PORTSC_CONNECT_STATUS_CHANGE (0x1<<1)
+#define PORTSC_PORT_ENABLE (0x1<<2)
+#define PORTSC_PORT_EN_DIS_CHANGE (0x1<<3)
+#define PORTSC_OVER_CURRENT_ACT (0x1<<4)
+#define PORTSC_OVER_CUURENT_CHG (0x1<<5)
+#define PORTSC_PORT_FORCE_RESUME (0x1<<6)
+#define PORTSC_PORT_SUSPEND (0x1<<7)
+#define PORTSC_PORT_RESET (0x1<<8)
+#define PORTSC_LINE_STATUS_BITS (0x3<<10)
+#define PORTSC_PORT_POWER (0x1<<12)
+#define PORTSC_PORT_INDICTOR_CTRL (0x3<<14)
+#define PORTSC_PORT_TEST_CTRL (0xF<<16)
+#define PORTSC_WAKE_ON_CONNECT_EN (0x1<<20)
+#define PORTSC_WAKE_ON_CONNECT_DIS (0x1<<21)
+#define PORTSC_WAKE_ON_OVER_CURRENT (0x1<<22)
+#define PORTSC_PHY_LOW_POWER_SPD (0x1<<23)
+#define PORTSC_PORT_FORCE_FULL_SPEED (0x1<<24)
+#define PORTSC_PORT_SPEED_MASK (0x3<<26)
+#define PORTSC_TRANSCEIVER_WIDTH (0x1<<28)
+#define PORTSC_PHY_TYPE_SEL (0x3<<30)
+/* bit 11-10 are line status */
+#define PORTSC_LINE_STATUS_SE0 (0x0<<10)
+#define PORTSC_LINE_STATUS_JSTATE (0x1<<10)
+#define PORTSC_LINE_STATUS_KSTATE (0x2<<10)
+#define PORTSC_LINE_STATUS_UNDEF (0x3<<10)
+#define PORTSC_LINE_STATUS_BIT_POS (10)
+
+/* bit 15-14 are port indicator control */
+#define PORTSC_PIC_OFF (0x0<<14)
+#define PORTSC_PIC_AMBER (0x1<<14)
+#define PORTSC_PIC_GREEN (0x2<<14)
+#define PORTSC_PIC_UNDEF (0x3<<14)
+#define PORTSC_PIC_BIT_POS (14)
+
+/* bit 19-16 are port test control */
+#define PORTSC_PTC_DISABLE (0x0<<16)
+#define PORTSC_PTC_JSTATE (0x1<<16)
+#define PORTSC_PTC_KSTATE (0x2<<16)
+#define PORTSC_PTC_SEQNAK (0x3<<16)
+#define PORTSC_PTC_PACKET (0x4<<16)
+#define PORTSC_PTC_FORCE_EN (0x5<<16)
+#define PORTSC_PTC_BIT_POS (16)
+
+/* bit 27-26 are port speed */
+#define PORTSC_PORT_SPEED_FULL (0x0<<26)
+#define PORTSC_PORT_SPEED_LOW (0x1<<26)
+#define PORTSC_PORT_SPEED_HIGH (0x2<<26)
+#define PORTSC_PORT_SPEED_UNDEF (0x3<<26)
+#define PORTSC_SPEED_BIT_POS (26)
+
+/* bit 28 is parallel transceiver width for UTMI interface */
+#define PORTSC_PTW (0x1<<28)
+#define PORTSC_PTW_8BIT (0x0<<28)
+#define PORTSC_PTW_16BIT (0x1<<28)
+
+/* bit 31-30 are port transceiver select */
+#define PORTSC_PTS_UTMI (0x0<<30)
+#define PORTSC_PTS_ULPI (0x2<<30)
+#define PORTSC_PTS_FSLS_SERIAL (0x3<<30)
+#define PORTSC_PTS_BIT_POS (30)
+
+#define PORTSC_W1C_BITS \
+ (PORTSC_CONNECT_STATUS_CHANGE | \
+ PORTSC_PORT_EN_DIS_CHANGE | \
+ PORTSC_OVER_CUURENT_CHG)
+
+/* OTG Status Control Register Bit Masks */
+#define OTGSC_CTRL_VBUS_DISCHARGE (0x1<<0)
+#define OTGSC_CTRL_VBUS_CHARGE (0x1<<1)
+#define OTGSC_CTRL_OTG_TERMINATION (0x1<<3)
+#define OTGSC_CTRL_DATA_PULSING (0x1<<4)
+#define OTGSC_CTRL_ID_PULL_EN (0x1<<5)
+#define OTGSC_HA_DATA_PULSE (0x1<<6)
+#define OTGSC_HA_BA (0x1<<7)
+#define OTGSC_STS_USB_ID (0x1<<8)
+#define OTGSC_STS_A_VBUS_VALID (0x1<<9)
+#define OTGSC_STS_A_SESSION_VALID (0x1<<10)
+#define OTGSC_STS_B_SESSION_VALID (0x1<<11)
+#define OTGSC_STS_B_SESSION_END (0x1<<12)
+#define OTGSC_STS_1MS_TOGGLE (0x1<<13)
+#define OTGSC_STS_DATA_PULSING (0x1<<14)
+#define OTGSC_INTSTS_USB_ID (0x1<<16)
+#define OTGSC_INTSTS_A_VBUS_VALID (0x1<<17)
+#define OTGSC_INTSTS_A_SESSION_VALID (0x1<<18)
+#define OTGSC_INTSTS_B_SESSION_VALID (0x1<<19)
+#define OTGSC_INTSTS_B_SESSION_END (0x1<<20)
+#define OTGSC_INTSTS_1MS (0x1<<21)
+#define OTGSC_INTSTS_DATA_PULSING (0x1<<22)
+#define OTGSC_INTR_USB_ID_EN (0x1<<24)
+#define OTGSC_INTR_A_VBUS_VALID_EN (0x1<<25)
+#define OTGSC_INTR_A_SESSION_VALID_EN (0x1<<26)
+#define OTGSC_INTR_B_SESSION_VALID_EN (0x1<<27)
+#define OTGSC_INTR_B_SESSION_END_EN (0x1<<28)
+#define OTGSC_INTR_1MS_TIMER_EN (0x1<<29)
+#define OTGSC_INTR_DATA_PULSING_EN (0x1<<30)
+#define OTGSC_INTSTS_MASK (0x00ff0000)
+
+/* USB MODE Register Bit Masks */
+#define USB_MODE_CTRL_MODE_IDLE (0x0<<0)
+#define USB_MODE_CTRL_MODE_DEVICE (0x2<<0)
+#define USB_MODE_CTRL_MODE_HOST (0x3<<0)
+#define USB_MODE_CTRL_MODE_RSV (0x1<<0)
+#define USB_MODE_SETUP_LOCK_OFF (0x1<<3)
+#define USB_MODE_STREAM_DISABLE (0x1<<4)
+#define USB_MODE_ES (0x1<<2) /* Endian Select */
+
+/* control Register Bit Masks */
+#define USB_CTRL_IOENB (0x1<<2)
+#define USB_CTRL_ULPI_INT0EN (0x1<<0)
+
+/* BCSR5 */
+#define BCSR5_INT_USB (0x02)
+
+/* USB module clk cfg */
+#define SCCR_OFFS (0xA08)
+#define SCCR_USB_CLK_DISABLE (0x00000000) /* USB clk disable */
+#define SCCR_USB_MPHCM_11 (0x00c00000)
+#define SCCR_USB_MPHCM_01 (0x00400000)
+#define SCCR_USB_MPHCM_10 (0x00800000)
+#define SCCR_USB_DRCM_11 (0x00300000)
+#define SCCR_USB_DRCM_01 (0x00100000)
+#define SCCR_USB_DRCM_10 (0x00200000)
+
+#define SICRL_OFFS (0x114)
+#define SICRL_USB0 (0x40000000)
+#define SICRL_USB1 (0x20000000)
+
+#define SICRH_OFFS (0x118)
+#define SICRH_USB_UTMI (0x00020000)
+
+/* OTG interrupt enable bit masks */
+#define OTGSC_INTERRUPT_ENABLE_BITS_MASK \
+ (OTGSC_INTR_USB_ID_EN | \
+ OTGSC_INTR_1MS_TIMER_EN | \
+ OTGSC_INTR_A_VBUS_VALID_EN | \
+ OTGSC_INTR_A_SESSION_VALID_EN | \
+ OTGSC_INTR_B_SESSION_VALID_EN | \
+ OTGSC_INTR_B_SESSION_END_EN | \
+ OTGSC_INTR_DATA_PULSING_EN)
+
+/* OTG interrupt status bit masks */
+#define OTGSC_INTERRUPT_STATUS_BITS_MASK \
+ (OTGSC_INTSTS_USB_ID | \
+ OTGSC_INTR_1MS_TIMER_EN | \
+ OTGSC_INTSTS_A_VBUS_VALID | \
+ OTGSC_INTSTS_A_SESSION_VALID | \
+ OTGSC_INTSTS_B_SESSION_VALID | \
+ OTGSC_INTSTS_B_SESSION_END | \
+ OTGSC_INTSTS_DATA_PULSING)
+
+/*
+ * A-DEVICE timing constants
+ */
+
+/* Wait for VBUS Rise */
+#define TA_WAIT_VRISE (100) /* a_wait_vrise 100 ms, section: 6.6.5.1 */
+
+/* Wait for B-Connect */
+#define TA_WAIT_BCON (10000) /* a_wait_bcon > 1 sec, section: 6.6.5.2
+ * This is only used to get out of
+ * OTG_STATE_A_WAIT_BCON state if there was
+ * no connection for these many milliseconds
+ */
+
+/* A-Idle to B-Disconnect */
+/* It is necessary for this timer to be more than 750 ms because of a bug in OPT
+ * test 5.4 in which B OPT disconnects after 750 ms instead of 75ms as stated
+ * in the test description
+ */
+#define TA_AIDL_BDIS (5000) /* a_suspend minimum 200 ms, section: 6.6.5.3 */
+
+/* B-Idle to A-Disconnect */
+#define TA_BIDL_ADIS (12) /* 3 to 200 ms */
+
+/* B-device timing constants */
+
+
+/* Data-Line Pulse Time*/
+#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms, section:5.3.3 */
+#define TB_DATA_PLS_MIN (5) /* minimum 5 ms */
+#define TB_DATA_PLS_MAX (10) /* maximum 10 ms */
+
+/* SRP Initiate Time */
+#define TB_SRP_INIT (100) /* b_srp_init,maximum 100 ms, section:5.3.8 */
+
+/* SRP Fail Time */
+#define TB_SRP_FAIL (7000) /* b_srp_init,Fail time 5~30s, section:6.8.2.2*/
+
+/* SRP result wait time */
+#define TB_SRP_WAIT (60)
+
+/* VBus time */
+#define TB_VBUS_PLS (30) /* time to keep vbus pulsing asserted */
+
+/* Discharge time */
+/* This time should be less than 10ms. It varies from system to system. */
+#define TB_VBUS_DSCHRG (8)
+
+/* A-SE0 to B-Reset */
+#define TB_ASE0_BRST (20) /* b_wait_acon, mini 3.125 ms,section:6.8.2.4 */
+
+/* A bus suspend timer before we can switch to b_wait_aconn */
+#define TB_A_SUSPEND (7)
+#define TB_BUS_RESUME (12)
+
+/* SE0 Time Before SRP */
+#define TB_SE0_SRP (2) /* b_idle,minimum 2 ms, section:5.3.2 */
+
+#define SET_OTG_STATE(otg_ptr, newstate) ((otg_ptr)->state = newstate)
+
+struct usb_dr_mmap {
+ /* Capability register */
+ u8 res1[256];
+ u16 caplength; /* Capability Register Length */
+ u16 hciversion; /* Host Controller Interface Version */
+ u32 hcsparams; /* Host Controller Structual Parameters */
+ u32 hccparams; /* Host Controller Capability Parameters */
+ u8 res2[20];
+ u32 dciversion; /* Device Controller Interface Version */
+ u32 dccparams; /* Device Controller Capability Parameters */
+ u8 res3[24];
+ /* Operation register */
+ u32 usbcmd; /* USB Command Register */
+ u32 usbsts; /* USB Status Register */
+ u32 usbintr; /* USB Interrupt Enable Register */
+ u32 frindex; /* Frame Index Register */
+ u8 res4[4];
+ u32 deviceaddr; /* Device Address */
+ u32 endpointlistaddr; /* Endpoint List Address Register */
+ u8 res5[4];
+ u32 burstsize; /* Master Interface Data Burst Size Register */
+ u32 txttfilltuning; /* Transmit FIFO Tuning Controls Register */
+ u8 res6[8];
+ u32 ulpiview; /* ULPI register access */
+ u8 res7[12];
+ u32 configflag; /* Configure Flag Register */
+ u32 portsc; /* Port 1 Status and Control Register */
+ u8 res8[28];
+ u32 otgsc; /* On-The-Go Status and Control */
+ u32 usbmode; /* USB Mode Register */
+ u32 endptsetupstat; /* Endpoint Setup Status Register */
+ u32 endpointprime; /* Endpoint Initialization Register */
+ u32 endptflush; /* Endpoint Flush Register */
+ u32 endptstatus; /* Endpoint Status Register */
+ u32 endptcomplete; /* Endpoint Complete Register */
+ u32 endptctrl[6]; /* Endpoint Control Registers */
+ u8 res9[552];
+ u32 snoop1;
+ u32 snoop2;
+ u32 age_cnt_thresh; /* Age Count Threshold Register */
+ u32 pri_ctrl; /* Priority Control Register */
+ u32 si_ctrl; /* System Interface Control Register */
+ u8 res10[236];
+ u32 control; /* General Purpose Control Register */
+};
+
+struct fsl_otg_timer {
+ unsigned long expires; /* Number of count increase to timeout */
+ unsigned long count; /* Tick counter */
+ void (*function)(unsigned long); /* Timeout function */
+ unsigned long data; /* Data passed to function */
+ struct list_head list;
+};
+
+inline struct fsl_otg_timer *otg_timer_initializer
+(void (*function)(unsigned long), unsigned long expires, unsigned long data)
+{
+ struct fsl_otg_timer *timer;
+
+ timer = kmalloc(sizeof(struct fsl_otg_timer), GFP_KERNEL);
+ if (!timer)
+ return NULL;
+ timer->function = function;
+ timer->expires = expires;
+ timer->data = data;
+ return timer;
+}
+
+struct fsl_otg {
+ struct usb_phy phy;
+ struct otg_fsm fsm;
+ struct usb_dr_mmap *dr_mem_map;
+ struct delayed_work otg_event;
+
+ /* used for usb host */
+ struct work_struct work_wq;
+ u8 host_working;
+
+ int irq;
+};
+
+struct fsl_otg_config {
+ u8 otg_port;
+};
+
+/* For SRP and HNP handle */
+#define FSL_OTG_MAJOR 240
+#define FSL_OTG_NAME "fsl-usb2-otg"
+/* Command to OTG driver ioctl */
+#define OTG_IOCTL_MAGIC FSL_OTG_MAJOR
+/* if otg work as host, it should return 1, otherwise return 0 */
+#define GET_OTG_STATUS _IOR(OTG_IOCTL_MAGIC, 1, int)
+#define SET_A_SUSPEND_REQ _IOW(OTG_IOCTL_MAGIC, 2, int)
+#define SET_A_BUS_DROP _IOW(OTG_IOCTL_MAGIC, 3, int)
+#define SET_A_BUS_REQ _IOW(OTG_IOCTL_MAGIC, 4, int)
+#define SET_B_BUS_REQ _IOW(OTG_IOCTL_MAGIC, 5, int)
+#define GET_A_SUSPEND_REQ _IOR(OTG_IOCTL_MAGIC, 6, int)
+#define GET_A_BUS_DROP _IOR(OTG_IOCTL_MAGIC, 7, int)
+#define GET_A_BUS_REQ _IOR(OTG_IOCTL_MAGIC, 8, int)
+#define GET_B_BUS_REQ _IOR(OTG_IOCTL_MAGIC, 9, int)
+
+void fsl_otg_add_timer(void *timer);
+void fsl_otg_del_timer(void *timer);
+void fsl_otg_pulse_vbus(void);
--- /dev/null
+/*
+ * gpio-vbus.c - simple GPIO VBUS sensing driver for B peripheral devices
+ *
+ * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <linux/workqueue.h>
+
+#include <linux/regulator/consumer.h>
+
+#include <linux/usb/gadget.h>
+#include <linux/usb/gpio_vbus.h>
+#include <linux/usb/otg.h>
+
+
+/*
+ * A simple GPIO VBUS sensing driver for B peripheral only devices
+ * with internal transceivers. It can control a D+ pullup GPIO and
+ * a regulator to limit the current drawn from VBUS.
+ *
+ * Needs to be loaded before the UDC driver that will use it.
+ */
+struct gpio_vbus_data {
+ struct usb_phy phy;
+ struct device *dev;
+ struct regulator *vbus_draw;
+ int vbus_draw_enabled;
+ unsigned mA;
+ struct delayed_work work;
+ int vbus;
+ int irq;
+};
+
+
+/*
+ * This driver relies on "both edges" triggering. VBUS has 100 msec to
+ * stabilize, so the peripheral controller driver may need to cope with
+ * some bouncing due to current surges (e.g. charging local capacitance)
+ * and contact chatter.
+ *
+ * REVISIT in desperate straits, toggling between rising and falling
+ * edges might be workable.
+ */
+#define VBUS_IRQ_FLAGS \
+ (IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
+
+
+/* interface to regulator framework */
+static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA)
+{
+ struct regulator *vbus_draw = gpio_vbus->vbus_draw;
+ int enabled;
+
+ if (!vbus_draw)
+ return;
+
+ enabled = gpio_vbus->vbus_draw_enabled;
+ if (mA) {
+ regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
+ if (!enabled) {
+ regulator_enable(vbus_draw);
+ gpio_vbus->vbus_draw_enabled = 1;
+ }
+ } else {
+ if (enabled) {
+ regulator_disable(vbus_draw);
+ gpio_vbus->vbus_draw_enabled = 0;
+ }
+ }
+ gpio_vbus->mA = mA;
+}
+
+static int is_vbus_powered(struct gpio_vbus_mach_info *pdata)
+{
+ int vbus;
+
+ vbus = gpio_get_value(pdata->gpio_vbus);
+ if (pdata->gpio_vbus_inverted)
+ vbus = !vbus;
+
+ return vbus;
+}
+
+static void gpio_vbus_work(struct work_struct *work)
+{
+ struct gpio_vbus_data *gpio_vbus =
+ container_of(work, struct gpio_vbus_data, work.work);
+ struct gpio_vbus_mach_info *pdata = gpio_vbus->dev->platform_data;
+ int gpio, status, vbus;
+
+ if (!gpio_vbus->phy.otg->gadget)
+ return;
+
+ vbus = is_vbus_powered(pdata);
+ if ((vbus ^ gpio_vbus->vbus) == 0)
+ return;
+ gpio_vbus->vbus = vbus;
+
+ /* Peripheral controllers which manage the pullup themselves won't have
+ * gpio_pullup configured here. If it's configured here, we'll do what
+ * isp1301_omap::b_peripheral() does and enable the pullup here... although
+ * that may complicate usb_gadget_{,dis}connect() support.
+ */
+ gpio = pdata->gpio_pullup;
+
+ if (vbus) {
+ status = USB_EVENT_VBUS;
+ gpio_vbus->phy.state = OTG_STATE_B_PERIPHERAL;
+ gpio_vbus->phy.last_event = status;
+ usb_gadget_vbus_connect(gpio_vbus->phy.otg->gadget);
+
+ /* drawing a "unit load" is *always* OK, except for OTG */
+ set_vbus_draw(gpio_vbus, 100);
+
+ /* optionally enable D+ pullup */
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, !pdata->gpio_pullup_inverted);
+
+ atomic_notifier_call_chain(&gpio_vbus->phy.notifier,
+ status, gpio_vbus->phy.otg->gadget);
+ } else {
+ /* optionally disable D+ pullup */
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, pdata->gpio_pullup_inverted);
+
+ set_vbus_draw(gpio_vbus, 0);
+
+ usb_gadget_vbus_disconnect(gpio_vbus->phy.otg->gadget);
+ status = USB_EVENT_NONE;
+ gpio_vbus->phy.state = OTG_STATE_B_IDLE;
+ gpio_vbus->phy.last_event = status;
+
+ atomic_notifier_call_chain(&gpio_vbus->phy.notifier,
+ status, gpio_vbus->phy.otg->gadget);
+ }
+}
+
+/* VBUS change IRQ handler */
+static irqreturn_t gpio_vbus_irq(int irq, void *data)
+{
+ struct platform_device *pdev = data;
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
+ struct usb_otg *otg = gpio_vbus->phy.otg;
+
+ dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n",
+ is_vbus_powered(pdata) ? "supplied" : "inactive",
+ otg->gadget ? otg->gadget->name : "none");
+
+ if (otg->gadget)
+ schedule_delayed_work(&gpio_vbus->work, msecs_to_jiffies(100));
+
+ return IRQ_HANDLED;
+}
+
+/* OTG transceiver interface */
+
+/* bind/unbind the peripheral controller */
+static int gpio_vbus_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct gpio_vbus_data *gpio_vbus;
+ struct gpio_vbus_mach_info *pdata;
+ struct platform_device *pdev;
+ int gpio;
+
+ gpio_vbus = container_of(otg->phy, struct gpio_vbus_data, phy);
+ pdev = to_platform_device(gpio_vbus->dev);
+ pdata = gpio_vbus->dev->platform_data;
+ gpio = pdata->gpio_pullup;
+
+ if (!gadget) {
+ dev_dbg(&pdev->dev, "unregistering gadget '%s'\n",
+ otg->gadget->name);
+
+ /* optionally disable D+ pullup */
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, pdata->gpio_pullup_inverted);
+
+ set_vbus_draw(gpio_vbus, 0);
+
+ usb_gadget_vbus_disconnect(otg->gadget);
+ otg->phy->state = OTG_STATE_UNDEFINED;
+
+ otg->gadget = NULL;
+ return 0;
+ }
+
+ otg->gadget = gadget;
+ dev_dbg(&pdev->dev, "registered gadget '%s'\n", gadget->name);
+
+ /* initialize connection state */
+ gpio_vbus->vbus = 0; /* start with disconnected */
+ gpio_vbus_irq(gpio_vbus->irq, pdev);
+ return 0;
+}
+
+/* effective for B devices, ignored for A-peripheral */
+static int gpio_vbus_set_power(struct usb_phy *phy, unsigned mA)
+{
+ struct gpio_vbus_data *gpio_vbus;
+
+ gpio_vbus = container_of(phy, struct gpio_vbus_data, phy);
+
+ if (phy->state == OTG_STATE_B_PERIPHERAL)
+ set_vbus_draw(gpio_vbus, mA);
+ return 0;
+}
+
+/* for non-OTG B devices: set/clear transceiver suspend mode */
+static int gpio_vbus_set_suspend(struct usb_phy *phy, int suspend)
+{
+ struct gpio_vbus_data *gpio_vbus;
+
+ gpio_vbus = container_of(phy, struct gpio_vbus_data, phy);
+
+ /* draw max 0 mA from vbus in suspend mode; or the previously
+ * recorded amount of current if not suspended
+ *
+ * NOTE: high powered configs (mA > 100) may draw up to 2.5 mA
+ * if they're wake-enabled ... we don't handle that yet.
+ */
+ return gpio_vbus_set_power(phy, suspend ? 0 : gpio_vbus->mA);
+}
+
+/* platform driver interface */
+
+static int __init gpio_vbus_probe(struct platform_device *pdev)
+{
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ struct gpio_vbus_data *gpio_vbus;
+ struct resource *res;
+ int err, gpio, irq;
+ unsigned long irqflags;
+
+ if (!pdata || !gpio_is_valid(pdata->gpio_vbus))
+ return -EINVAL;
+ gpio = pdata->gpio_vbus;
+
+ gpio_vbus = kzalloc(sizeof(struct gpio_vbus_data), GFP_KERNEL);
+ if (!gpio_vbus)
+ return -ENOMEM;
+
+ gpio_vbus->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
+ if (!gpio_vbus->phy.otg) {
+ kfree(gpio_vbus);
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(pdev, gpio_vbus);
+ gpio_vbus->dev = &pdev->dev;
+ gpio_vbus->phy.label = "gpio-vbus";
+ gpio_vbus->phy.set_power = gpio_vbus_set_power;
+ gpio_vbus->phy.set_suspend = gpio_vbus_set_suspend;
+ gpio_vbus->phy.state = OTG_STATE_UNDEFINED;
+
+ gpio_vbus->phy.otg->phy = &gpio_vbus->phy;
+ gpio_vbus->phy.otg->set_peripheral = gpio_vbus_set_peripheral;
+
+ err = gpio_request(gpio, "vbus_detect");
+ if (err) {
+ dev_err(&pdev->dev, "can't request vbus gpio %d, err: %d\n",
+ gpio, err);
+ goto err_gpio;
+ }
+ gpio_direction_input(gpio);
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res) {
+ irq = res->start;
+ irqflags = (res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED;
+ } else {
+ irq = gpio_to_irq(gpio);
+ irqflags = VBUS_IRQ_FLAGS;
+ }
+
+ gpio_vbus->irq = irq;
+
+ /* if data line pullup is in use, initialize it to "not pulling up" */
+ gpio = pdata->gpio_pullup;
+ if (gpio_is_valid(gpio)) {
+ err = gpio_request(gpio, "udc_pullup");
+ if (err) {
+ dev_err(&pdev->dev,
+ "can't request pullup gpio %d, err: %d\n",
+ gpio, err);
+ gpio_free(pdata->gpio_vbus);
+ goto err_gpio;
+ }
+ gpio_direction_output(gpio, pdata->gpio_pullup_inverted);
+ }
+
+ err = request_irq(irq, gpio_vbus_irq, irqflags, "vbus_detect", pdev);
+ if (err) {
+ dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
+ irq, err);
+ goto err_irq;
+ }
+
+ ATOMIC_INIT_NOTIFIER_HEAD(&gpio_vbus->phy.notifier);
+
+ INIT_DELAYED_WORK(&gpio_vbus->work, gpio_vbus_work);
+
+ gpio_vbus->vbus_draw = regulator_get(&pdev->dev, "vbus_draw");
+ if (IS_ERR(gpio_vbus->vbus_draw)) {
+ dev_dbg(&pdev->dev, "can't get vbus_draw regulator, err: %ld\n",
+ PTR_ERR(gpio_vbus->vbus_draw));
+ gpio_vbus->vbus_draw = NULL;
+ }
+
+ /* only active when a gadget is registered */
+ err = usb_add_phy(&gpio_vbus->phy, USB_PHY_TYPE_USB2);
+ if (err) {
+ dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
+ err);
+ goto err_otg;
+ }
+
+ device_init_wakeup(&pdev->dev, pdata->wakeup);
+
+ return 0;
+err_otg:
+ regulator_put(gpio_vbus->vbus_draw);
+ free_irq(irq, pdev);
+err_irq:
+ if (gpio_is_valid(pdata->gpio_pullup))
+ gpio_free(pdata->gpio_pullup);
+ gpio_free(pdata->gpio_vbus);
+err_gpio:
+ platform_set_drvdata(pdev, NULL);
+ kfree(gpio_vbus->phy.otg);
+ kfree(gpio_vbus);
+ return err;
+}
+
+static int __exit gpio_vbus_remove(struct platform_device *pdev)
+{
+ struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ int gpio = pdata->gpio_vbus;
+
+ device_init_wakeup(&pdev->dev, 0);
+ cancel_delayed_work_sync(&gpio_vbus->work);
+ regulator_put(gpio_vbus->vbus_draw);
+
+ usb_remove_phy(&gpio_vbus->phy);
+
+ free_irq(gpio_vbus->irq, pdev);
+ if (gpio_is_valid(pdata->gpio_pullup))
+ gpio_free(pdata->gpio_pullup);
+ gpio_free(gpio);
+ platform_set_drvdata(pdev, NULL);
+ kfree(gpio_vbus->phy.otg);
+ kfree(gpio_vbus);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int gpio_vbus_pm_suspend(struct device *dev)
+{
+ struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(gpio_vbus->irq);
+
+ return 0;
+}
+
+static int gpio_vbus_pm_resume(struct device *dev)
+{
+ struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(gpio_vbus->irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops gpio_vbus_dev_pm_ops = {
+ .suspend = gpio_vbus_pm_suspend,
+ .resume = gpio_vbus_pm_resume,
+};
+#endif
+
+/* NOTE: the gpio-vbus device may *NOT* be hotplugged */
+
+MODULE_ALIAS("platform:gpio-vbus");
+
+static struct platform_driver gpio_vbus_driver = {
+ .driver = {
+ .name = "gpio-vbus",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &gpio_vbus_dev_pm_ops,
+#endif
+ },
+ .remove = __exit_p(gpio_vbus_remove),
+};
+
+module_platform_driver_probe(gpio_vbus_driver, gpio_vbus_probe);
+
+MODULE_DESCRIPTION("simple GPIO controlled OTG transceiver driver");
+MODULE_AUTHOR("Philipp Zabel");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
+ *
+ * Copyright (C) 2004 Texas Instruments
+ * Copyright (C) 2004 David Brownell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb.h>
+#include <linux/usb/otg.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include <mach/mux.h>
+
+#include <mach/usb.h>
+
+#ifndef DEBUG
+#undef VERBOSE
+#endif
+
+
+#define DRIVER_VERSION "24 August 2004"
+#define DRIVER_NAME (isp1301_driver.driver.name)
+
+MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
+MODULE_LICENSE("GPL");
+
+struct isp1301 {
+ struct usb_phy phy;
+ struct i2c_client *client;
+ void (*i2c_release)(struct device *dev);
+
+ int irq_type;
+
+ u32 last_otg_ctrl;
+ unsigned working:1;
+
+ struct timer_list timer;
+
+ /* use keventd context to change the state for us */
+ struct work_struct work;
+
+ unsigned long todo;
+# define WORK_UPDATE_ISP 0 /* update ISP from OTG */
+# define WORK_UPDATE_OTG 1 /* update OTG from ISP */
+# define WORK_HOST_RESUME 4 /* resume host */
+# define WORK_TIMER 6 /* timer fired */
+# define WORK_STOP 7 /* don't resubmit */
+};
+
+
+/* bits in OTG_CTRL */
+
+#define OTG_XCEIV_OUTPUTS \
+ (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
+#define OTG_XCEIV_INPUTS \
+ (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
+#define OTG_CTRL_BITS \
+ (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
+ /* and OTG_PULLUP is sometimes written */
+
+#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
+ OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
+ OTG_CTRL_BITS)
+
+
+/*-------------------------------------------------------------------------*/
+
+/* board-specific PM hooks */
+
+#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
+
+#if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
+
+#include <linux/i2c/tps65010.h>
+
+#else
+
+static inline int tps65010_set_vbus_draw(unsigned mA)
+{
+ pr_debug("tps65010: draw %d mA (STUB)\n", mA);
+ return 0;
+}
+
+#endif
+
+static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
+{
+ int status = tps65010_set_vbus_draw(mA);
+ if (status < 0)
+ pr_debug(" VBUS %d mA error %d\n", mA, status);
+}
+
+#else
+
+static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
+{
+ /* H4 controls this by DIP switch S2.4; no soft control.
+ * ON means the charger is always enabled. Leave it OFF
+ * unless the OTG port is used only in B-peripheral mode.
+ */
+}
+
+#endif
+
+static void enable_vbus_source(struct isp1301 *isp)
+{
+ /* this board won't supply more than 8mA vbus power.
+ * some boards can switch a 100ma "unit load" (or more).
+ */
+}
+
+
+/* products will deliver OTG messages with LEDs, GUI, etc */
+static inline void notresponding(struct isp1301 *isp)
+{
+ printk(KERN_NOTICE "OTG device not responding.\n");
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static struct i2c_driver isp1301_driver;
+
+/* smbus apis are used for portability */
+
+static inline u8
+isp1301_get_u8(struct isp1301 *isp, u8 reg)
+{
+ return i2c_smbus_read_byte_data(isp->client, reg + 0);
+}
+
+static inline int
+isp1301_get_u16(struct isp1301 *isp, u8 reg)
+{
+ return i2c_smbus_read_word_data(isp->client, reg);
+}
+
+static inline int
+isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
+{
+ return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
+}
+
+static inline int
+isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
+{
+ return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* identification */
+#define ISP1301_VENDOR_ID 0x00 /* u16 read */
+#define ISP1301_PRODUCT_ID 0x02 /* u16 read */
+#define ISP1301_BCD_DEVICE 0x14 /* u16 read */
+
+#define I2C_VENDOR_ID_PHILIPS 0x04cc
+#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
+
+/* operational registers */
+#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
+# define MC1_SPEED (1 << 0)
+# define MC1_SUSPEND (1 << 1)
+# define MC1_DAT_SE0 (1 << 2)
+# define MC1_TRANSPARENT (1 << 3)
+# define MC1_BDIS_ACON_EN (1 << 4)
+# define MC1_OE_INT_EN (1 << 5)
+# define MC1_UART_EN (1 << 6)
+# define MC1_MASK 0x7f
+#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
+# define MC2_GLOBAL_PWR_DN (1 << 0)
+# define MC2_SPD_SUSP_CTRL (1 << 1)
+# define MC2_BI_DI (1 << 2)
+# define MC2_TRANSP_BDIR0 (1 << 3)
+# define MC2_TRANSP_BDIR1 (1 << 4)
+# define MC2_AUDIO_EN (1 << 5)
+# define MC2_PSW_EN (1 << 6)
+# define MC2_EN2V7 (1 << 7)
+#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
+# define OTG1_DP_PULLUP (1 << 0)
+# define OTG1_DM_PULLUP (1 << 1)
+# define OTG1_DP_PULLDOWN (1 << 2)
+# define OTG1_DM_PULLDOWN (1 << 3)
+# define OTG1_ID_PULLDOWN (1 << 4)
+# define OTG1_VBUS_DRV (1 << 5)
+# define OTG1_VBUS_DISCHRG (1 << 6)
+# define OTG1_VBUS_CHRG (1 << 7)
+#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
+# define OTG_B_SESS_END (1 << 6)
+# define OTG_B_SESS_VLD (1 << 7)
+
+#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
+#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
+
+#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
+#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
+
+/* same bitfields in all interrupt registers */
+# define INTR_VBUS_VLD (1 << 0)
+# define INTR_SESS_VLD (1 << 1)
+# define INTR_DP_HI (1 << 2)
+# define INTR_ID_GND (1 << 3)
+# define INTR_DM_HI (1 << 4)
+# define INTR_ID_FLOAT (1 << 5)
+# define INTR_BDIS_ACON (1 << 6)
+# define INTR_CR_INT (1 << 7)
+
+/*-------------------------------------------------------------------------*/
+
+static inline const char *state_name(struct isp1301 *isp)
+{
+ return usb_otg_state_string(isp->phy.state);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* NOTE: some of this ISP1301 setup is specific to H2 boards;
+ * not everything is guarded by board-specific checks, or even using
+ * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
+ *
+ * ALSO: this currently doesn't use ISP1301 low-power modes
+ * while OTG is running.
+ */
+
+static void power_down(struct isp1301 *isp)
+{
+ isp->phy.state = OTG_STATE_UNDEFINED;
+
+ // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
+
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+}
+
+static void power_up(struct isp1301 *isp)
+{
+ // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
+
+ /* do this only when cpu is driving transceiver,
+ * so host won't see a low speed device...
+ */
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+}
+
+#define NO_HOST_SUSPEND
+
+static int host_suspend(struct isp1301 *isp)
+{
+#ifdef NO_HOST_SUSPEND
+ return 0;
+#else
+ struct device *dev;
+
+ if (!isp->phy.otg->host)
+ return -ENODEV;
+
+ /* Currently ASSUMES only the OTG port matters;
+ * other ports could be active...
+ */
+ dev = isp->phy.otg->host->controller;
+ return dev->driver->suspend(dev, 3, 0);
+#endif
+}
+
+static int host_resume(struct isp1301 *isp)
+{
+#ifdef NO_HOST_SUSPEND
+ return 0;
+#else
+ struct device *dev;
+
+ if (!isp->phy.otg->host)
+ return -ENODEV;
+
+ dev = isp->phy.otg->host->controller;
+ return dev->driver->resume(dev, 0);
+#endif
+}
+
+static int gadget_suspend(struct isp1301 *isp)
+{
+ isp->phy.otg->gadget->b_hnp_enable = 0;
+ isp->phy.otg->gadget->a_hnp_support = 0;
+ isp->phy.otg->gadget->a_alt_hnp_support = 0;
+ return usb_gadget_vbus_disconnect(isp->phy.otg->gadget);
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define TIMER_MINUTES 10
+#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
+
+/* Almost all our I2C messaging comes from a work queue's task context.
+ * NOTE: guaranteeing certain response times might mean we shouldn't
+ * share keventd's work queue; a realtime task might be safest.
+ */
+static void isp1301_defer_work(struct isp1301 *isp, int work)
+{
+ int status;
+
+ if (isp && !test_and_set_bit(work, &isp->todo)) {
+ (void) get_device(&isp->client->dev);
+ status = schedule_work(&isp->work);
+ if (!status && !isp->working)
+ dev_vdbg(&isp->client->dev,
+ "work item %d may be lost\n", work);
+ }
+}
+
+/* called from irq handlers */
+static void a_idle(struct isp1301 *isp, const char *tag)
+{
+ u32 l;
+
+ if (isp->phy.state == OTG_STATE_A_IDLE)
+ return;
+
+ isp->phy.otg->default_a = 1;
+ if (isp->phy.otg->host) {
+ isp->phy.otg->host->is_b_host = 0;
+ host_suspend(isp);
+ }
+ if (isp->phy.otg->gadget) {
+ isp->phy.otg->gadget->is_a_peripheral = 1;
+ gadget_suspend(isp);
+ }
+ isp->phy.state = OTG_STATE_A_IDLE;
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+ isp->last_otg_ctrl = l;
+ pr_debug(" --> %s/%s\n", state_name(isp), tag);
+}
+
+/* called from irq handlers */
+static void b_idle(struct isp1301 *isp, const char *tag)
+{
+ u32 l;
+
+ if (isp->phy.state == OTG_STATE_B_IDLE)
+ return;
+
+ isp->phy.otg->default_a = 0;
+ if (isp->phy.otg->host) {
+ isp->phy.otg->host->is_b_host = 1;
+ host_suspend(isp);
+ }
+ if (isp->phy.otg->gadget) {
+ isp->phy.otg->gadget->is_a_peripheral = 0;
+ gadget_suspend(isp);
+ }
+ isp->phy.state = OTG_STATE_B_IDLE;
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+ isp->last_otg_ctrl = l;
+ pr_debug(" --> %s/%s\n", state_name(isp), tag);
+}
+
+static void
+dump_regs(struct isp1301 *isp, const char *label)
+{
+#ifdef DEBUG
+ u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
+ u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
+ u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
+
+ pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
+ omap_readl(OTG_CTRL), label, state_name(isp),
+ ctrl, status, src);
+ /* mode control and irq enables don't change much */
+#endif
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_USB_OTG
+
+/*
+ * The OMAP OTG controller handles most of the OTG state transitions.
+ *
+ * We translate isp1301 outputs (mostly voltage comparator status) into
+ * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
+ * flags into isp1301 inputs ... and infer state transitions.
+ */
+
+#ifdef VERBOSE
+
+static void check_state(struct isp1301 *isp, const char *tag)
+{
+ enum usb_otg_state state = OTG_STATE_UNDEFINED;
+ u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
+ unsigned extra = 0;
+
+ switch (fsm) {
+
+ /* default-b */
+ case 0x0:
+ state = OTG_STATE_B_IDLE;
+ break;
+ case 0x3:
+ case 0x7:
+ extra = 1;
+ case 0x1:
+ state = OTG_STATE_B_PERIPHERAL;
+ break;
+ case 0x11:
+ state = OTG_STATE_B_SRP_INIT;
+ break;
+
+ /* extra dual-role default-b states */
+ case 0x12:
+ case 0x13:
+ case 0x16:
+ extra = 1;
+ case 0x17:
+ state = OTG_STATE_B_WAIT_ACON;
+ break;
+ case 0x34:
+ state = OTG_STATE_B_HOST;
+ break;
+
+ /* default-a */
+ case 0x36:
+ state = OTG_STATE_A_IDLE;
+ break;
+ case 0x3c:
+ state = OTG_STATE_A_WAIT_VFALL;
+ break;
+ case 0x7d:
+ state = OTG_STATE_A_VBUS_ERR;
+ break;
+ case 0x9e:
+ case 0x9f:
+ extra = 1;
+ case 0x89:
+ state = OTG_STATE_A_PERIPHERAL;
+ break;
+ case 0xb7:
+ state = OTG_STATE_A_WAIT_VRISE;
+ break;
+ case 0xb8:
+ state = OTG_STATE_A_WAIT_BCON;
+ break;
+ case 0xb9:
+ state = OTG_STATE_A_HOST;
+ break;
+ case 0xba:
+ state = OTG_STATE_A_SUSPEND;
+ break;
+ default:
+ break;
+ }
+ if (isp->phy.state == state && !extra)
+ return;
+ pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
+ usb_otg_state_string(state), fsm, state_name(isp),
+ omap_readl(OTG_CTRL));
+}
+
+#else
+
+static inline void check_state(struct isp1301 *isp, const char *tag) { }
+
+#endif
+
+/* outputs from ISP1301_INTERRUPT_SOURCE */
+static void update_otg1(struct isp1301 *isp, u8 int_src)
+{
+ u32 otg_ctrl;
+
+ otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ otg_ctrl &= ~OTG_XCEIV_INPUTS;
+ otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
+
+ if (int_src & INTR_SESS_VLD)
+ otg_ctrl |= OTG_ASESSVLD;
+ else if (isp->phy.state == OTG_STATE_A_WAIT_VFALL) {
+ a_idle(isp, "vfall");
+ otg_ctrl &= ~OTG_CTRL_BITS;
+ }
+ if (int_src & INTR_VBUS_VLD)
+ otg_ctrl |= OTG_VBUSVLD;
+ if (int_src & INTR_ID_GND) { /* default-A */
+ if (isp->phy.state == OTG_STATE_B_IDLE
+ || isp->phy.state
+ == OTG_STATE_UNDEFINED) {
+ a_idle(isp, "init");
+ return;
+ }
+ } else { /* default-B */
+ otg_ctrl |= OTG_ID;
+ if (isp->phy.state == OTG_STATE_A_IDLE
+ || isp->phy.state == OTG_STATE_UNDEFINED) {
+ b_idle(isp, "init");
+ return;
+ }
+ }
+ omap_writel(otg_ctrl, OTG_CTRL);
+}
+
+/* outputs from ISP1301_OTG_STATUS */
+static void update_otg2(struct isp1301 *isp, u8 otg_status)
+{
+ u32 otg_ctrl;
+
+ otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ otg_ctrl &= ~OTG_XCEIV_INPUTS;
+ otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
+ if (otg_status & OTG_B_SESS_VLD)
+ otg_ctrl |= OTG_BSESSVLD;
+ else if (otg_status & OTG_B_SESS_END)
+ otg_ctrl |= OTG_BSESSEND;
+ omap_writel(otg_ctrl, OTG_CTRL);
+}
+
+/* inputs going to ISP1301 */
+static void otg_update_isp(struct isp1301 *isp)
+{
+ u32 otg_ctrl, otg_change;
+ u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_change = otg_ctrl ^ isp->last_otg_ctrl;
+ isp->last_otg_ctrl = otg_ctrl;
+ otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
+
+ switch (isp->phy.state) {
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_B_PERIPHERAL:
+ case OTG_STATE_B_SRP_INIT:
+ if (!(otg_ctrl & OTG_PULLUP)) {
+ // if (otg_ctrl & OTG_B_HNPEN) {
+ if (isp->phy.otg->gadget->b_hnp_enable) {
+ isp->phy.state = OTG_STATE_B_WAIT_ACON;
+ pr_debug(" --> b_wait_acon\n");
+ }
+ goto pulldown;
+ }
+pullup:
+ set |= OTG1_DP_PULLUP;
+ clr |= OTG1_DP_PULLDOWN;
+ break;
+ case OTG_STATE_A_SUSPEND:
+ case OTG_STATE_A_PERIPHERAL:
+ if (otg_ctrl & OTG_PULLUP)
+ goto pullup;
+ /* FALLTHROUGH */
+ // case OTG_STATE_B_WAIT_ACON:
+ default:
+pulldown:
+ set |= OTG1_DP_PULLDOWN;
+ clr |= OTG1_DP_PULLUP;
+ break;
+ }
+
+# define toggle(OTG,ISP) do { \
+ if (otg_ctrl & OTG) set |= ISP; \
+ else clr |= ISP; \
+ } while (0)
+
+ if (!(isp->phy.otg->host))
+ otg_ctrl &= ~OTG_DRV_VBUS;
+
+ switch (isp->phy.state) {
+ case OTG_STATE_A_SUSPEND:
+ if (otg_ctrl & OTG_DRV_VBUS) {
+ set |= OTG1_VBUS_DRV;
+ break;
+ }
+ /* HNP failed for some reason (A_AIDL_BDIS timeout) */
+ notresponding(isp);
+
+ /* FALLTHROUGH */
+ case OTG_STATE_A_VBUS_ERR:
+ isp->phy.state = OTG_STATE_A_WAIT_VFALL;
+ pr_debug(" --> a_wait_vfall\n");
+ /* FALLTHROUGH */
+ case OTG_STATE_A_WAIT_VFALL:
+ /* FIXME usbcore thinks port power is still on ... */
+ clr |= OTG1_VBUS_DRV;
+ break;
+ case OTG_STATE_A_IDLE:
+ if (otg_ctrl & OTG_DRV_VBUS) {
+ isp->phy.state = OTG_STATE_A_WAIT_VRISE;
+ pr_debug(" --> a_wait_vrise\n");
+ }
+ /* FALLTHROUGH */
+ default:
+ toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
+ }
+
+ toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
+ toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
+
+# undef toggle
+
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
+
+ /* HNP switch to host or peripheral; and SRP */
+ if (otg_change & OTG_PULLUP) {
+ u32 l;
+
+ switch (isp->phy.state) {
+ case OTG_STATE_B_IDLE:
+ if (clr & OTG1_DP_PULLUP)
+ break;
+ isp->phy.state = OTG_STATE_B_PERIPHERAL;
+ pr_debug(" --> b_peripheral\n");
+ break;
+ case OTG_STATE_A_SUSPEND:
+ if (clr & OTG1_DP_PULLUP)
+ break;
+ isp->phy.state = OTG_STATE_A_PERIPHERAL;
+ pr_debug(" --> a_peripheral\n");
+ break;
+ default:
+ break;
+ }
+ l = omap_readl(OTG_CTRL);
+ l |= OTG_PULLUP;
+ omap_writel(l, OTG_CTRL);
+ }
+
+ check_state(isp, __func__);
+ dump_regs(isp, "otg->isp1301");
+}
+
+static irqreturn_t omap_otg_irq(int irq, void *_isp)
+{
+ u16 otg_irq = omap_readw(OTG_IRQ_SRC);
+ u32 otg_ctrl;
+ int ret = IRQ_NONE;
+ struct isp1301 *isp = _isp;
+ struct usb_otg *otg = isp->phy.otg;
+
+ /* update ISP1301 transceiver from OTG controller */
+ if (otg_irq & OPRT_CHG) {
+ omap_writew(OPRT_CHG, OTG_IRQ_SRC);
+ isp1301_defer_work(isp, WORK_UPDATE_ISP);
+ ret = IRQ_HANDLED;
+
+ /* SRP to become b_peripheral failed */
+ } else if (otg_irq & B_SRP_TMROUT) {
+ pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
+ notresponding(isp);
+
+ /* gadget drivers that care should monitor all kinds of
+ * remote wakeup (SRP, normal) using their own timer
+ * to give "check cable and A-device" messages.
+ */
+ if (isp->phy.state == OTG_STATE_B_SRP_INIT)
+ b_idle(isp, "srp_timeout");
+
+ omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* HNP to become b_host failed */
+ } else if (otg_irq & B_HNP_FAIL) {
+ pr_debug("otg: %s B_HNP_FAIL, %06x\n",
+ state_name(isp), omap_readl(OTG_CTRL));
+ notresponding(isp);
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_ctrl |= OTG_BUSDROP;
+ otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl, OTG_CTRL);
+
+ /* subset of b_peripheral()... */
+ isp->phy.state = OTG_STATE_B_PERIPHERAL;
+ pr_debug(" --> b_peripheral\n");
+
+ omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* detect SRP from B-device ... */
+ } else if (otg_irq & A_SRP_DETECT) {
+ pr_debug("otg: %s SRP_DETECT, %06x\n",
+ state_name(isp), omap_readl(OTG_CTRL));
+
+ isp1301_defer_work(isp, WORK_UPDATE_OTG);
+ switch (isp->phy.state) {
+ case OTG_STATE_A_IDLE:
+ if (!otg->host)
+ break;
+ isp1301_defer_work(isp, WORK_HOST_RESUME);
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_ctrl |= OTG_A_BUSREQ;
+ otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
+ & ~OTG_XCEIV_INPUTS
+ & OTG_CTRL_MASK;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ break;
+ default:
+ break;
+ }
+
+ omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
+ * we don't track them separately
+ */
+ } else if (otg_irq & A_REQ_TMROUT) {
+ otg_ctrl = omap_readl(OTG_CTRL);
+ pr_info("otg: BCON_TMOUT from %s, %06x\n",
+ state_name(isp), otg_ctrl);
+ notresponding(isp);
+
+ otg_ctrl |= OTG_BUSDROP;
+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ isp->phy.state = OTG_STATE_A_WAIT_VFALL;
+
+ omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* A-supplied voltage fell too low; overcurrent */
+ } else if (otg_irq & A_VBUS_ERR) {
+ otg_ctrl = omap_readl(OTG_CTRL);
+ printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
+ state_name(isp), otg_irq, otg_ctrl);
+
+ otg_ctrl |= OTG_BUSDROP;
+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ isp->phy.state = OTG_STATE_A_VBUS_ERR;
+
+ omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* switch driver; the transceiver code activates it,
+ * ungating the udc clock or resuming OHCI.
+ */
+ } else if (otg_irq & DRIVER_SWITCH) {
+ int kick = 0;
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
+ state_name(isp),
+ (otg_ctrl & OTG_DRIVER_SEL)
+ ? "gadget" : "host",
+ otg_ctrl);
+ isp1301_defer_work(isp, WORK_UPDATE_ISP);
+
+ /* role is peripheral */
+ if (otg_ctrl & OTG_DRIVER_SEL) {
+ switch (isp->phy.state) {
+ case OTG_STATE_A_IDLE:
+ b_idle(isp, __func__);
+ break;
+ default:
+ break;
+ }
+ isp1301_defer_work(isp, WORK_UPDATE_ISP);
+
+ /* role is host */
+ } else {
+ if (!(otg_ctrl & OTG_ID)) {
+ otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
+ }
+
+ if (otg->host) {
+ switch (isp->phy.state) {
+ case OTG_STATE_B_WAIT_ACON:
+ isp->phy.state = OTG_STATE_B_HOST;
+ pr_debug(" --> b_host\n");
+ kick = 1;
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ isp->phy.state = OTG_STATE_A_HOST;
+ pr_debug(" --> a_host\n");
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ isp->phy.state = OTG_STATE_A_WAIT_BCON;
+ pr_debug(" --> a_wait_bcon\n");
+ break;
+ default:
+ break;
+ }
+ isp1301_defer_work(isp, WORK_HOST_RESUME);
+ }
+ }
+
+ omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ if (kick)
+ usb_bus_start_enum(otg->host, otg->host->otg_port);
+ }
+
+ check_state(isp, __func__);
+ return ret;
+}
+
+static struct platform_device *otg_dev;
+
+static int isp1301_otg_init(struct isp1301 *isp)
+{
+ u32 l;
+
+ if (!otg_dev)
+ return -ENODEV;
+
+ dump_regs(isp, __func__);
+ /* some of these values are board-specific... */
+ l = omap_readl(OTG_SYSCON_2);
+ l |= OTG_EN
+ /* for B-device: */
+ | SRP_GPDATA /* 9msec Bdev D+ pulse */
+ | SRP_GPDVBUS /* discharge after VBUS pulse */
+ // | (3 << 24) /* 2msec VBUS pulse */
+ /* for A-device: */
+ | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
+ | SRP_DPW /* detect 167+ns SRP pulses */
+ | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
+ ;
+ omap_writel(l, OTG_SYSCON_2);
+
+ update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
+ update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
+
+ check_state(isp, __func__);
+ pr_debug("otg: %s, %s %06x\n",
+ state_name(isp), __func__, omap_readl(OTG_CTRL));
+
+ omap_writew(DRIVER_SWITCH | OPRT_CHG
+ | B_SRP_TMROUT | B_HNP_FAIL
+ | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
+
+ l = omap_readl(OTG_SYSCON_2);
+ l |= OTG_EN;
+ omap_writel(l, OTG_SYSCON_2);
+
+ return 0;
+}
+
+static int otg_probe(struct platform_device *dev)
+{
+ // struct omap_usb_config *config = dev->platform_data;
+
+ otg_dev = dev;
+ return 0;
+}
+
+static int otg_remove(struct platform_device *dev)
+{
+ otg_dev = NULL;
+ return 0;
+}
+
+static struct platform_driver omap_otg_driver = {
+ .probe = otg_probe,
+ .remove = otg_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "omap_otg",
+ },
+};
+
+static int otg_bind(struct isp1301 *isp)
+{
+ int status;
+
+ if (otg_dev)
+ return -EBUSY;
+
+ status = platform_driver_register(&omap_otg_driver);
+ if (status < 0)
+ return status;
+
+ if (otg_dev)
+ status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
+ 0, DRIVER_NAME, isp);
+ else
+ status = -ENODEV;
+
+ if (status < 0)
+ platform_driver_unregister(&omap_otg_driver);
+ return status;
+}
+
+static void otg_unbind(struct isp1301 *isp)
+{
+ if (!otg_dev)
+ return;
+ free_irq(otg_dev->resource[1].start, isp);
+}
+
+#else
+
+/* OTG controller isn't clocked */
+
+#endif /* CONFIG_USB_OTG */
+
+/*-------------------------------------------------------------------------*/
+
+static void b_peripheral(struct isp1301 *isp)
+{
+ u32 l;
+
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+
+ usb_gadget_vbus_connect(isp->phy.otg->gadget);
+
+#ifdef CONFIG_USB_OTG
+ enable_vbus_draw(isp, 8);
+ otg_update_isp(isp);
+#else
+ enable_vbus_draw(isp, 100);
+ /* UDC driver just set OTG_BSESSVLD */
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
+ isp->phy.state = OTG_STATE_B_PERIPHERAL;
+ pr_debug(" --> b_peripheral\n");
+ dump_regs(isp, "2periph");
+#endif
+}
+
+static void isp_update_otg(struct isp1301 *isp, u8 stat)
+{
+ struct usb_otg *otg = isp->phy.otg;
+ u8 isp_stat, isp_bstat;
+ enum usb_otg_state state = isp->phy.state;
+
+ if (stat & INTR_BDIS_ACON)
+ pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
+
+ /* start certain state transitions right away */
+ isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
+ if (isp_stat & INTR_ID_GND) {
+ if (otg->default_a) {
+ switch (state) {
+ case OTG_STATE_B_IDLE:
+ a_idle(isp, "idle");
+ /* FALLTHROUGH */
+ case OTG_STATE_A_IDLE:
+ enable_vbus_source(isp);
+ /* FALLTHROUGH */
+ case OTG_STATE_A_WAIT_VRISE:
+ /* we skip over OTG_STATE_A_WAIT_BCON, since
+ * the HC will transition to A_HOST (or
+ * A_SUSPEND!) without our noticing except
+ * when HNP is used.
+ */
+ if (isp_stat & INTR_VBUS_VLD)
+ isp->phy.state = OTG_STATE_A_HOST;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ if (!(isp_stat & INTR_SESS_VLD))
+ a_idle(isp, "vfell");
+ break;
+ default:
+ if (!(isp_stat & INTR_VBUS_VLD))
+ isp->phy.state = OTG_STATE_A_VBUS_ERR;
+ break;
+ }
+ isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
+ } else {
+ switch (state) {
+ case OTG_STATE_B_PERIPHERAL:
+ case OTG_STATE_B_HOST:
+ case OTG_STATE_B_WAIT_ACON:
+ usb_gadget_vbus_disconnect(otg->gadget);
+ break;
+ default:
+ break;
+ }
+ if (state != OTG_STATE_A_IDLE)
+ a_idle(isp, "id");
+ if (otg->host && state == OTG_STATE_A_IDLE)
+ isp1301_defer_work(isp, WORK_HOST_RESUME);
+ isp_bstat = 0;
+ }
+ } else {
+ u32 l;
+
+ /* if user unplugged mini-A end of cable,
+ * don't bypass A_WAIT_VFALL.
+ */
+ if (otg->default_a) {
+ switch (state) {
+ default:
+ isp->phy.state = OTG_STATE_A_WAIT_VFALL;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ state = OTG_STATE_A_IDLE;
+ /* khubd may take a while to notice and
+ * handle this disconnect, so don't go
+ * to B_IDLE quite yet.
+ */
+ break;
+ case OTG_STATE_A_IDLE:
+ host_suspend(isp);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
+ MC1_BDIS_ACON_EN);
+ isp->phy.state = OTG_STATE_B_IDLE;
+ l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ l &= ~OTG_CTRL_BITS;
+ omap_writel(l, OTG_CTRL);
+ break;
+ case OTG_STATE_B_IDLE:
+ break;
+ }
+ }
+ isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
+
+ switch (isp->phy.state) {
+ case OTG_STATE_B_PERIPHERAL:
+ case OTG_STATE_B_WAIT_ACON:
+ case OTG_STATE_B_HOST:
+ if (likely(isp_bstat & OTG_B_SESS_VLD))
+ break;
+ enable_vbus_draw(isp, 0);
+#ifndef CONFIG_USB_OTG
+ /* UDC driver will clear OTG_BSESSVLD */
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
+ OTG1_DP_PULLDOWN);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
+ OTG1_DP_PULLUP);
+ dump_regs(isp, __func__);
+#endif
+ /* FALLTHROUGH */
+ case OTG_STATE_B_SRP_INIT:
+ b_idle(isp, __func__);
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+ /* FALLTHROUGH */
+ case OTG_STATE_B_IDLE:
+ if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) {
+#ifdef CONFIG_USB_OTG
+ update_otg1(isp, isp_stat);
+ update_otg2(isp, isp_bstat);
+#endif
+ b_peripheral(isp);
+ } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
+ isp_bstat |= OTG_B_SESS_END;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ break;
+ default:
+ pr_debug("otg: unsupported b-device %s\n",
+ state_name(isp));
+ break;
+ }
+ }
+
+ if (state != isp->phy.state)
+ pr_debug(" isp, %s -> %s\n",
+ usb_otg_state_string(state), state_name(isp));
+
+#ifdef CONFIG_USB_OTG
+ /* update the OTG controller state to match the isp1301; may
+ * trigger OPRT_CHG irqs for changes going to the isp1301.
+ */
+ update_otg1(isp, isp_stat);
+ update_otg2(isp, isp_bstat);
+ check_state(isp, __func__);
+#endif
+
+ dump_regs(isp, "isp1301->otg");
+}
+
+/*-------------------------------------------------------------------------*/
+
+static u8 isp1301_clear_latch(struct isp1301 *isp)
+{
+ u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
+ return latch;
+}
+
+static void
+isp1301_work(struct work_struct *work)
+{
+ struct isp1301 *isp = container_of(work, struct isp1301, work);
+ int stop;
+
+ /* implicit lock: we're the only task using this device */
+ isp->working = 1;
+ do {
+ stop = test_bit(WORK_STOP, &isp->todo);
+
+#ifdef CONFIG_USB_OTG
+ /* transfer state from otg engine to isp1301 */
+ if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
+ otg_update_isp(isp);
+ put_device(&isp->client->dev);
+ }
+#endif
+ /* transfer state from isp1301 to otg engine */
+ if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
+ u8 stat = isp1301_clear_latch(isp);
+
+ isp_update_otg(isp, stat);
+ put_device(&isp->client->dev);
+ }
+
+ if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
+ u32 otg_ctrl;
+
+ /*
+ * skip A_WAIT_VRISE; hc transitions invisibly
+ * skip A_WAIT_BCON; same.
+ */
+ switch (isp->phy.state) {
+ case OTG_STATE_A_WAIT_BCON:
+ case OTG_STATE_A_WAIT_VRISE:
+ isp->phy.state = OTG_STATE_A_HOST;
+ pr_debug(" --> a_host\n");
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_ctrl |= OTG_A_BUSREQ;
+ otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
+ & OTG_CTRL_MASK;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ isp->phy.state = OTG_STATE_B_HOST;
+ pr_debug(" --> b_host (acon)\n");
+ break;
+ case OTG_STATE_B_HOST:
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_A_IDLE:
+ break;
+ default:
+ pr_debug(" host resume in %s\n",
+ state_name(isp));
+ }
+ host_resume(isp);
+ // mdelay(10);
+ put_device(&isp->client->dev);
+ }
+
+ if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
+#ifdef VERBOSE
+ dump_regs(isp, "timer");
+ if (!stop)
+ mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
+#endif
+ put_device(&isp->client->dev);
+ }
+
+ if (isp->todo)
+ dev_vdbg(&isp->client->dev,
+ "work done, todo = 0x%lx\n",
+ isp->todo);
+ if (stop) {
+ dev_dbg(&isp->client->dev, "stop\n");
+ break;
+ }
+ } while (isp->todo);
+ isp->working = 0;
+}
+
+static irqreturn_t isp1301_irq(int irq, void *isp)
+{
+ isp1301_defer_work(isp, WORK_UPDATE_OTG);
+ return IRQ_HANDLED;
+}
+
+static void isp1301_timer(unsigned long _isp)
+{
+ isp1301_defer_work((void *)_isp, WORK_TIMER);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void isp1301_release(struct device *dev)
+{
+ struct isp1301 *isp;
+
+ isp = dev_get_drvdata(dev);
+
+ /* FIXME -- not with a "new style" driver, it doesn't!! */
+
+ /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
+ if (isp->i2c_release)
+ isp->i2c_release(dev);
+ kfree(isp->phy.otg);
+ kfree (isp);
+}
+
+static struct isp1301 *the_transceiver;
+
+static int __exit isp1301_remove(struct i2c_client *i2c)
+{
+ struct isp1301 *isp;
+
+ isp = i2c_get_clientdata(i2c);
+
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
+ free_irq(i2c->irq, isp);
+#ifdef CONFIG_USB_OTG
+ otg_unbind(isp);
+#endif
+ if (machine_is_omap_h2())
+ gpio_free(2);
+
+ isp->timer.data = 0;
+ set_bit(WORK_STOP, &isp->todo);
+ del_timer_sync(&isp->timer);
+ flush_work(&isp->work);
+
+ put_device(&i2c->dev);
+ the_transceiver = NULL;
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* NOTE: three modes are possible here, only one of which
+ * will be standards-conformant on any given system:
+ *
+ * - OTG mode (dual-role), required if there's a Mini-AB connector
+ * - HOST mode, for when there's one or more A (host) connectors
+ * - DEVICE mode, for when there's a B/Mini-B (device) connector
+ *
+ * As a rule, you won't have an isp1301 chip unless it's there to
+ * support the OTG mode. Other modes help testing USB controllers
+ * in isolation from (full) OTG support, or maybe so later board
+ * revisions can help to support those feature.
+ */
+
+#ifdef CONFIG_USB_OTG
+
+static int isp1301_otg_enable(struct isp1301 *isp)
+{
+ power_up(isp);
+ isp1301_otg_init(isp);
+
+ /* NOTE: since we don't change this, this provides
+ * a few more interrupts than are strictly needed.
+ */
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
+ INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
+ INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
+
+ dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
+
+ return 0;
+}
+
+#endif
+
+/* add or disable the host device+driver */
+static int
+isp1301_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
+
+ if (!otg || isp != the_transceiver)
+ return -ENODEV;
+
+ if (!host) {
+ omap_writew(0, OTG_IRQ_EN);
+ power_down(isp);
+ otg->host = NULL;
+ return 0;
+ }
+
+#ifdef CONFIG_USB_OTG
+ otg->host = host;
+ dev_dbg(&isp->client->dev, "registered host\n");
+ host_suspend(isp);
+ if (otg->gadget)
+ return isp1301_otg_enable(isp);
+ return 0;
+
+#elif !defined(CONFIG_USB_GADGET_OMAP)
+ // FIXME update its refcount
+ otg->host = host;
+
+ power_up(isp);
+
+ if (machine_is_omap_h2())
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+
+ dev_info(&isp->client->dev, "A-Host sessions ok\n");
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
+ INTR_ID_GND);
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
+ INTR_ID_GND);
+
+ /* If this has a Mini-AB connector, this mode is highly
+ * nonstandard ... but can be handy for testing, especially with
+ * the Mini-A end of an OTG cable. (Or something nonstandard
+ * like MiniB-to-StandardB, maybe built with a gender mender.)
+ */
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
+
+ dump_regs(isp, __func__);
+
+ return 0;
+
+#else
+ dev_dbg(&isp->client->dev, "host sessions not allowed\n");
+ return -EINVAL;
+#endif
+
+}
+
+static int
+isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
+{
+ struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
+
+ if (!otg || isp != the_transceiver)
+ return -ENODEV;
+
+ if (!gadget) {
+ omap_writew(0, OTG_IRQ_EN);
+ if (!otg->default_a)
+ enable_vbus_draw(isp, 0);
+ usb_gadget_vbus_disconnect(otg->gadget);
+ otg->gadget = NULL;
+ power_down(isp);
+ return 0;
+ }
+
+#ifdef CONFIG_USB_OTG
+ otg->gadget = gadget;
+ dev_dbg(&isp->client->dev, "registered gadget\n");
+ /* gadget driver may be suspended until vbus_connect () */
+ if (otg->host)
+ return isp1301_otg_enable(isp);
+ return 0;
+
+#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
+ otg->gadget = gadget;
+ // FIXME update its refcount
+
+ {
+ u32 l;
+
+ l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
+ l |= OTG_ID;
+ omap_writel(l, OTG_CTRL);
+ }
+
+ power_up(isp);
+ isp->phy.state = OTG_STATE_B_IDLE;
+
+ if (machine_is_omap_h2() || machine_is_omap_h3())
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
+ INTR_SESS_VLD);
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
+ INTR_VBUS_VLD);
+ dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
+ dump_regs(isp, __func__);
+
+ /* If this has a Mini-AB connector, this mode is highly
+ * nonstandard ... but can be handy for testing, so long
+ * as you don't plug a Mini-A cable into the jack.
+ */
+ if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
+ b_peripheral(isp);
+
+ return 0;
+
+#else
+ dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
+ return -EINVAL;
+#endif
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int
+isp1301_set_power(struct usb_phy *dev, unsigned mA)
+{
+ if (!the_transceiver)
+ return -ENODEV;
+ if (dev->state == OTG_STATE_B_PERIPHERAL)
+ enable_vbus_draw(the_transceiver, mA);
+ return 0;
+}
+
+static int
+isp1301_start_srp(struct usb_otg *otg)
+{
+ struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
+ u32 otg_ctrl;
+
+ if (!otg || isp != the_transceiver
+ || isp->phy.state != OTG_STATE_B_IDLE)
+ return -ENODEV;
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ if (!(otg_ctrl & OTG_BSESSEND))
+ return -EINVAL;
+
+ otg_ctrl |= OTG_B_BUSREQ;
+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ isp->phy.state = OTG_STATE_B_SRP_INIT;
+
+ pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
+ omap_readl(OTG_CTRL));
+#ifdef CONFIG_USB_OTG
+ check_state(isp, __func__);
+#endif
+ return 0;
+}
+
+static int
+isp1301_start_hnp(struct usb_otg *otg)
+{
+#ifdef CONFIG_USB_OTG
+ struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy);
+ u32 l;
+
+ if (!otg || isp != the_transceiver)
+ return -ENODEV;
+ if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable))
+ return -ENOTCONN;
+ if (!otg->default_a && (otg->gadget == NULL
+ || !otg->gadget->b_hnp_enable))
+ return -ENOTCONN;
+
+ /* We want hardware to manage most HNP protocol timings.
+ * So do this part as early as possible...
+ */
+ switch (isp->phy.state) {
+ case OTG_STATE_B_HOST:
+ isp->phy.state = OTG_STATE_B_PERIPHERAL;
+ /* caller will suspend next */
+ break;
+ case OTG_STATE_A_HOST:
+#if 0
+ /* autoconnect mode avoids irq latency bugs */
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
+ MC1_BDIS_ACON_EN);
+#endif
+ /* caller must suspend then clear A_BUSREQ */
+ usb_gadget_vbus_connect(otg->gadget);
+ l = omap_readl(OTG_CTRL);
+ l |= OTG_A_SETB_HNPEN;
+ omap_writel(l, OTG_CTRL);
+
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ /* initiated by B-Host suspend */
+ break;
+ default:
+ return -EILSEQ;
+ }
+ pr_debug("otg: HNP %s, %06x ...\n",
+ state_name(isp), omap_readl(OTG_CTRL));
+ check_state(isp, __func__);
+ return 0;
+#else
+ /* srp-only */
+ return -EINVAL;
+#endif
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int
+isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
+{
+ int status;
+ struct isp1301 *isp;
+
+ if (the_transceiver)
+ return 0;
+
+ isp = kzalloc(sizeof *isp, GFP_KERNEL);
+ if (!isp)
+ return 0;
+
+ isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL);
+ if (!isp->phy.otg) {
+ kfree(isp);
+ return 0;
+ }
+
+ INIT_WORK(&isp->work, isp1301_work);
+ init_timer(&isp->timer);
+ isp->timer.function = isp1301_timer;
+ isp->timer.data = (unsigned long) isp;
+
+ i2c_set_clientdata(i2c, isp);
+ isp->client = i2c;
+
+ /* verify the chip (shouldn't be necessary) */
+ status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
+ if (status != I2C_VENDOR_ID_PHILIPS) {
+ dev_dbg(&i2c->dev, "not philips id: %d\n", status);
+ goto fail;
+ }
+ status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
+ if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
+ dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
+ goto fail;
+ }
+ isp->i2c_release = i2c->dev.release;
+ i2c->dev.release = isp1301_release;
+
+ /* initial development used chiprev 2.00 */
+ status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
+ dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
+ status >> 8, status & 0xff);
+
+ /* make like power-on reset */
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
+
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
+
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
+ OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
+ ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
+
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
+
+#ifdef CONFIG_USB_OTG
+ status = otg_bind(isp);
+ if (status < 0) {
+ dev_dbg(&i2c->dev, "can't bind OTG\n");
+ goto fail;
+ }
+#endif
+
+ if (machine_is_omap_h2()) {
+ /* full speed signaling by default */
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
+ MC1_SPEED);
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
+ MC2_SPD_SUSP_CTRL);
+
+ /* IRQ wired at M14 */
+ omap_cfg_reg(M14_1510_GPIO2);
+ if (gpio_request(2, "isp1301") == 0)
+ gpio_direction_input(2);
+ isp->irq_type = IRQF_TRIGGER_FALLING;
+ }
+
+ status = request_irq(i2c->irq, isp1301_irq,
+ isp->irq_type, DRIVER_NAME, isp);
+ if (status < 0) {
+ dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
+ i2c->irq, status);
+ goto fail;
+ }
+
+ isp->phy.dev = &i2c->dev;
+ isp->phy.label = DRIVER_NAME;
+ isp->phy.set_power = isp1301_set_power,
+
+ isp->phy.otg->phy = &isp->phy;
+ isp->phy.otg->set_host = isp1301_set_host,
+ isp->phy.otg->set_peripheral = isp1301_set_peripheral,
+ isp->phy.otg->start_srp = isp1301_start_srp,
+ isp->phy.otg->start_hnp = isp1301_start_hnp,
+
+ enable_vbus_draw(isp, 0);
+ power_down(isp);
+ the_transceiver = isp;
+
+#ifdef CONFIG_USB_OTG
+ update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
+ update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
+#endif
+
+ dump_regs(isp, __func__);
+
+#ifdef VERBOSE
+ mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
+ dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
+#endif
+
+ status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
+ if (status < 0)
+ dev_err(&i2c->dev, "can't register transceiver, %d\n",
+ status);
+
+ return 0;
+
+fail:
+ kfree(isp->phy.otg);
+ kfree(isp);
+ return -ENODEV;
+}
+
+static const struct i2c_device_id isp1301_id[] = {
+ { "isp1301_omap", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, isp1301_id);
+
+static struct i2c_driver isp1301_driver = {
+ .driver = {
+ .name = "isp1301_omap",
+ },
+ .probe = isp1301_probe,
+ .remove = __exit_p(isp1301_remove),
+ .id_table = isp1301_id,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int __init isp_init(void)
+{
+ return i2c_add_driver(&isp1301_driver);
+}
+subsys_initcall(isp_init);
+
+static void __exit isp_exit(void)
+{
+ if (the_transceiver)
+ usb_remove_phy(&the_transceiver->phy);
+ i2c_del_driver(&isp1301_driver);
+}
+module_exit(isp_exit);
+
--- /dev/null
+/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/usb.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/msm_hsusb.h>
+#include <linux/usb/msm_hsusb_hw.h>
+#include <linux/regulator/consumer.h>
+
+#include <mach/clk.h>
+
+#define MSM_USB_BASE (motg->regs)
+#define DRIVER_NAME "msm_otg"
+
+#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
+
+#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */
+#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */
+#define USB_PHY_3P3_HPM_LOAD 50000 /* uA */
+#define USB_PHY_3P3_LPM_LOAD 4000 /* uA */
+
+#define USB_PHY_1P8_VOL_MIN 1800000 /* uV */
+#define USB_PHY_1P8_VOL_MAX 1800000 /* uV */
+#define USB_PHY_1P8_HPM_LOAD 50000 /* uA */
+#define USB_PHY_1P8_LPM_LOAD 4000 /* uA */
+
+#define USB_PHY_VDD_DIG_VOL_MIN 1000000 /* uV */
+#define USB_PHY_VDD_DIG_VOL_MAX 1320000 /* uV */
+
+static struct regulator *hsusb_3p3;
+static struct regulator *hsusb_1p8;
+static struct regulator *hsusb_vddcx;
+
+static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
+{
+ int ret = 0;
+
+ if (init) {
+ hsusb_vddcx = regulator_get(motg->phy.dev, "HSUSB_VDDCX");
+ if (IS_ERR(hsusb_vddcx)) {
+ dev_err(motg->phy.dev, "unable to get hsusb vddcx\n");
+ return PTR_ERR(hsusb_vddcx);
+ }
+
+ ret = regulator_set_voltage(hsusb_vddcx,
+ USB_PHY_VDD_DIG_VOL_MIN,
+ USB_PHY_VDD_DIG_VOL_MAX);
+ if (ret) {
+ dev_err(motg->phy.dev, "unable to set the voltage "
+ "for hsusb vddcx\n");
+ regulator_put(hsusb_vddcx);
+ return ret;
+ }
+
+ ret = regulator_enable(hsusb_vddcx);
+ if (ret) {
+ dev_err(motg->phy.dev, "unable to enable hsusb vddcx\n");
+ regulator_put(hsusb_vddcx);
+ }
+ } else {
+ ret = regulator_set_voltage(hsusb_vddcx, 0,
+ USB_PHY_VDD_DIG_VOL_MAX);
+ if (ret)
+ dev_err(motg->phy.dev, "unable to set the voltage "
+ "for hsusb vddcx\n");
+ ret = regulator_disable(hsusb_vddcx);
+ if (ret)
+ dev_err(motg->phy.dev, "unable to disable hsusb vddcx\n");
+
+ regulator_put(hsusb_vddcx);
+ }
+
+ return ret;
+}
+
+static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
+{
+ int rc = 0;
+
+ if (init) {
+ hsusb_3p3 = regulator_get(motg->phy.dev, "HSUSB_3p3");
+ if (IS_ERR(hsusb_3p3)) {
+ dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
+ return PTR_ERR(hsusb_3p3);
+ }
+
+ rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN,
+ USB_PHY_3P3_VOL_MAX);
+ if (rc) {
+ dev_err(motg->phy.dev, "unable to set voltage level "
+ "for hsusb 3p3\n");
+ goto put_3p3;
+ }
+ rc = regulator_enable(hsusb_3p3);
+ if (rc) {
+ dev_err(motg->phy.dev, "unable to enable the hsusb 3p3\n");
+ goto put_3p3;
+ }
+ hsusb_1p8 = regulator_get(motg->phy.dev, "HSUSB_1p8");
+ if (IS_ERR(hsusb_1p8)) {
+ dev_err(motg->phy.dev, "unable to get hsusb 1p8\n");
+ rc = PTR_ERR(hsusb_1p8);
+ goto disable_3p3;
+ }
+ rc = regulator_set_voltage(hsusb_1p8, USB_PHY_1P8_VOL_MIN,
+ USB_PHY_1P8_VOL_MAX);
+ if (rc) {
+ dev_err(motg->phy.dev, "unable to set voltage level "
+ "for hsusb 1p8\n");
+ goto put_1p8;
+ }
+ rc = regulator_enable(hsusb_1p8);
+ if (rc) {
+ dev_err(motg->phy.dev, "unable to enable the hsusb 1p8\n");
+ goto put_1p8;
+ }
+
+ return 0;
+ }
+
+ regulator_disable(hsusb_1p8);
+put_1p8:
+ regulator_put(hsusb_1p8);
+disable_3p3:
+ regulator_disable(hsusb_3p3);
+put_3p3:
+ regulator_put(hsusb_3p3);
+ return rc;
+}
+
+#ifdef CONFIG_PM_SLEEP
+#define USB_PHY_SUSP_DIG_VOL 500000
+static int msm_hsusb_config_vddcx(int high)
+{
+ int max_vol = USB_PHY_VDD_DIG_VOL_MAX;
+ int min_vol;
+ int ret;
+
+ if (high)
+ min_vol = USB_PHY_VDD_DIG_VOL_MIN;
+ else
+ min_vol = USB_PHY_SUSP_DIG_VOL;
+
+ ret = regulator_set_voltage(hsusb_vddcx, min_vol, max_vol);
+ if (ret) {
+ pr_err("%s: unable to set the voltage for regulator "
+ "HSUSB_VDDCX\n", __func__);
+ return ret;
+ }
+
+ pr_debug("%s: min_vol:%d max_vol:%d\n", __func__, min_vol, max_vol);
+
+ return ret;
+}
+#endif
+
+static int msm_hsusb_ldo_set_mode(int on)
+{
+ int ret = 0;
+
+ if (!hsusb_1p8 || IS_ERR(hsusb_1p8)) {
+ pr_err("%s: HSUSB_1p8 is not initialized\n", __func__);
+ return -ENODEV;
+ }
+
+ if (!hsusb_3p3 || IS_ERR(hsusb_3p3)) {
+ pr_err("%s: HSUSB_3p3 is not initialized\n", __func__);
+ return -ENODEV;
+ }
+
+ if (on) {
+ ret = regulator_set_optimum_mode(hsusb_1p8,
+ USB_PHY_1P8_HPM_LOAD);
+ if (ret < 0) {
+ pr_err("%s: Unable to set HPM of the regulator "
+ "HSUSB_1p8\n", __func__);
+ return ret;
+ }
+ ret = regulator_set_optimum_mode(hsusb_3p3,
+ USB_PHY_3P3_HPM_LOAD);
+ if (ret < 0) {
+ pr_err("%s: Unable to set HPM of the regulator "
+ "HSUSB_3p3\n", __func__);
+ regulator_set_optimum_mode(hsusb_1p8,
+ USB_PHY_1P8_LPM_LOAD);
+ return ret;
+ }
+ } else {
+ ret = regulator_set_optimum_mode(hsusb_1p8,
+ USB_PHY_1P8_LPM_LOAD);
+ if (ret < 0)
+ pr_err("%s: Unable to set LPM of the regulator "
+ "HSUSB_1p8\n", __func__);
+ ret = regulator_set_optimum_mode(hsusb_3p3,
+ USB_PHY_3P3_LPM_LOAD);
+ if (ret < 0)
+ pr_err("%s: Unable to set LPM of the regulator "
+ "HSUSB_3p3\n", __func__);
+ }
+
+ pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
+ return ret < 0 ? ret : 0;
+}
+
+static int ulpi_read(struct usb_phy *phy, u32 reg)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ int cnt = 0;
+
+ /* initiate read operation */
+ writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg),
+ USB_ULPI_VIEWPORT);
+
+ /* wait for completion */
+ while (cnt < ULPI_IO_TIMEOUT_USEC) {
+ if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
+ break;
+ udelay(1);
+ cnt++;
+ }
+
+ if (cnt >= ULPI_IO_TIMEOUT_USEC) {
+ dev_err(phy->dev, "ulpi_read: timeout %08x\n",
+ readl(USB_ULPI_VIEWPORT));
+ return -ETIMEDOUT;
+ }
+ return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT));
+}
+
+static int ulpi_write(struct usb_phy *phy, u32 val, u32 reg)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ int cnt = 0;
+
+ /* initiate write operation */
+ writel(ULPI_RUN | ULPI_WRITE |
+ ULPI_ADDR(reg) | ULPI_DATA(val),
+ USB_ULPI_VIEWPORT);
+
+ /* wait for completion */
+ while (cnt < ULPI_IO_TIMEOUT_USEC) {
+ if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
+ break;
+ udelay(1);
+ cnt++;
+ }
+
+ if (cnt >= ULPI_IO_TIMEOUT_USEC) {
+ dev_err(phy->dev, "ulpi_write: timeout\n");
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static struct usb_phy_io_ops msm_otg_io_ops = {
+ .read = ulpi_read,
+ .write = ulpi_write,
+};
+
+static void ulpi_init(struct msm_otg *motg)
+{
+ struct msm_otg_platform_data *pdata = motg->pdata;
+ int *seq = pdata->phy_init_seq;
+
+ if (!seq)
+ return;
+
+ while (seq[0] >= 0) {
+ dev_vdbg(motg->phy.dev, "ulpi: write 0x%02x to 0x%02x\n",
+ seq[0], seq[1]);
+ ulpi_write(&motg->phy, seq[0], seq[1]);
+ seq += 2;
+ }
+}
+
+static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
+{
+ int ret;
+
+ if (assert) {
+ ret = clk_reset(motg->clk, CLK_RESET_ASSERT);
+ if (ret)
+ dev_err(motg->phy.dev, "usb hs_clk assert failed\n");
+ } else {
+ ret = clk_reset(motg->clk, CLK_RESET_DEASSERT);
+ if (ret)
+ dev_err(motg->phy.dev, "usb hs_clk deassert failed\n");
+ }
+ return ret;
+}
+
+static int msm_otg_phy_clk_reset(struct msm_otg *motg)
+{
+ int ret;
+
+ ret = clk_reset(motg->phy_reset_clk, CLK_RESET_ASSERT);
+ if (ret) {
+ dev_err(motg->phy.dev, "usb phy clk assert failed\n");
+ return ret;
+ }
+ usleep_range(10000, 12000);
+ ret = clk_reset(motg->phy_reset_clk, CLK_RESET_DEASSERT);
+ if (ret)
+ dev_err(motg->phy.dev, "usb phy clk deassert failed\n");
+ return ret;
+}
+
+static int msm_otg_phy_reset(struct msm_otg *motg)
+{
+ u32 val;
+ int ret;
+ int retries;
+
+ ret = msm_otg_link_clk_reset(motg, 1);
+ if (ret)
+ return ret;
+ ret = msm_otg_phy_clk_reset(motg);
+ if (ret)
+ return ret;
+ ret = msm_otg_link_clk_reset(motg, 0);
+ if (ret)
+ return ret;
+
+ val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
+ writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
+
+ for (retries = 3; retries > 0; retries--) {
+ ret = ulpi_write(&motg->phy, ULPI_FUNC_CTRL_SUSPENDM,
+ ULPI_CLR(ULPI_FUNC_CTRL));
+ if (!ret)
+ break;
+ ret = msm_otg_phy_clk_reset(motg);
+ if (ret)
+ return ret;
+ }
+ if (!retries)
+ return -ETIMEDOUT;
+
+ /* This reset calibrates the phy, if the above write succeeded */
+ ret = msm_otg_phy_clk_reset(motg);
+ if (ret)
+ return ret;
+
+ for (retries = 3; retries > 0; retries--) {
+ ret = ulpi_read(&motg->phy, ULPI_DEBUG);
+ if (ret != -ETIMEDOUT)
+ break;
+ ret = msm_otg_phy_clk_reset(motg);
+ if (ret)
+ return ret;
+ }
+ if (!retries)
+ return -ETIMEDOUT;
+
+ dev_info(motg->phy.dev, "phy_reset: success\n");
+ return 0;
+}
+
+#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
+static int msm_otg_reset(struct usb_phy *phy)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ struct msm_otg_platform_data *pdata = motg->pdata;
+ int cnt = 0;
+ int ret;
+ u32 val = 0;
+ u32 ulpi_val = 0;
+
+ ret = msm_otg_phy_reset(motg);
+ if (ret) {
+ dev_err(phy->dev, "phy_reset failed\n");
+ return ret;
+ }
+
+ ulpi_init(motg);
+
+ writel(USBCMD_RESET, USB_USBCMD);
+ while (cnt < LINK_RESET_TIMEOUT_USEC) {
+ if (!(readl(USB_USBCMD) & USBCMD_RESET))
+ break;
+ udelay(1);
+ cnt++;
+ }
+ if (cnt >= LINK_RESET_TIMEOUT_USEC)
+ return -ETIMEDOUT;
+
+ /* select ULPI phy */
+ writel(0x80000000, USB_PORTSC);
+
+ msleep(100);
+
+ writel(0x0, USB_AHBBURST);
+ writel(0x00, USB_AHBMODE);
+
+ if (pdata->otg_control == OTG_PHY_CONTROL) {
+ val = readl(USB_OTGSC);
+ if (pdata->mode == USB_OTG) {
+ ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID;
+ val |= OTGSC_IDIE | OTGSC_BSVIE;
+ } else if (pdata->mode == USB_PERIPHERAL) {
+ ulpi_val = ULPI_INT_SESS_VALID;
+ val |= OTGSC_BSVIE;
+ }
+ writel(val, USB_OTGSC);
+ ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_RISE);
+ ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_FALL);
+ }
+
+ return 0;
+}
+
+#define PHY_SUSPEND_TIMEOUT_USEC (500 * 1000)
+#define PHY_RESUME_TIMEOUT_USEC (100 * 1000)
+
+#ifdef CONFIG_PM_SLEEP
+static int msm_otg_suspend(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ struct usb_bus *bus = phy->otg->host;
+ struct msm_otg_platform_data *pdata = motg->pdata;
+ int cnt = 0;
+
+ if (atomic_read(&motg->in_lpm))
+ return 0;
+
+ disable_irq(motg->irq);
+ /*
+ * Chipidea 45-nm PHY suspend sequence:
+ *
+ * Interrupt Latch Register auto-clear feature is not present
+ * in all PHY versions. Latch register is clear on read type.
+ * Clear latch register to avoid spurious wakeup from
+ * low power mode (LPM).
+ *
+ * PHY comparators are disabled when PHY enters into low power
+ * mode (LPM). Keep PHY comparators ON in LPM only when we expect
+ * VBUS/Id notifications from USB PHY. Otherwise turn off USB
+ * PHY comparators. This save significant amount of power.
+ *
+ * PLL is not turned off when PHY enters into low power mode (LPM).
+ * Disable PLL for maximum power savings.
+ */
+
+ if (motg->pdata->phy_type == CI_45NM_INTEGRATED_PHY) {
+ ulpi_read(phy, 0x14);
+ if (pdata->otg_control == OTG_PHY_CONTROL)
+ ulpi_write(phy, 0x01, 0x30);
+ ulpi_write(phy, 0x08, 0x09);
+ }
+
+ /*
+ * PHY may take some time or even fail to enter into low power
+ * mode (LPM). Hence poll for 500 msec and reset the PHY and link
+ * in failure case.
+ */
+ writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC);
+ while (cnt < PHY_SUSPEND_TIMEOUT_USEC) {
+ if (readl(USB_PORTSC) & PORTSC_PHCD)
+ break;
+ udelay(1);
+ cnt++;
+ }
+
+ if (cnt >= PHY_SUSPEND_TIMEOUT_USEC) {
+ dev_err(phy->dev, "Unable to suspend PHY\n");
+ msm_otg_reset(phy);
+ enable_irq(motg->irq);
+ return -ETIMEDOUT;
+ }
+
+ /*
+ * PHY has capability to generate interrupt asynchronously in low
+ * power mode (LPM). This interrupt is level triggered. So USB IRQ
+ * line must be disabled till async interrupt enable bit is cleared
+ * in USBCMD register. Assert STP (ULPI interface STOP signal) to
+ * block data communication from PHY.
+ */
+ writel(readl(USB_USBCMD) | ASYNC_INTR_CTRL | ULPI_STP_CTRL, USB_USBCMD);
+
+ if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
+ motg->pdata->otg_control == OTG_PMIC_CONTROL)
+ writel(readl(USB_PHY_CTRL) | PHY_RETEN, USB_PHY_CTRL);
+
+ clk_disable(motg->pclk);
+ clk_disable(motg->clk);
+ if (motg->core_clk)
+ clk_disable(motg->core_clk);
+
+ if (!IS_ERR(motg->pclk_src))
+ clk_disable(motg->pclk_src);
+
+ if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
+ motg->pdata->otg_control == OTG_PMIC_CONTROL) {
+ msm_hsusb_ldo_set_mode(0);
+ msm_hsusb_config_vddcx(0);
+ }
+
+ if (device_may_wakeup(phy->dev))
+ enable_irq_wake(motg->irq);
+ if (bus)
+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
+
+ atomic_set(&motg->in_lpm, 1);
+ enable_irq(motg->irq);
+
+ dev_info(phy->dev, "USB in low power mode\n");
+
+ return 0;
+}
+
+static int msm_otg_resume(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ struct usb_bus *bus = phy->otg->host;
+ int cnt = 0;
+ unsigned temp;
+
+ if (!atomic_read(&motg->in_lpm))
+ return 0;
+
+ if (!IS_ERR(motg->pclk_src))
+ clk_enable(motg->pclk_src);
+
+ clk_enable(motg->pclk);
+ clk_enable(motg->clk);
+ if (motg->core_clk)
+ clk_enable(motg->core_clk);
+
+ if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
+ motg->pdata->otg_control == OTG_PMIC_CONTROL) {
+ msm_hsusb_ldo_set_mode(1);
+ msm_hsusb_config_vddcx(1);
+ writel(readl(USB_PHY_CTRL) & ~PHY_RETEN, USB_PHY_CTRL);
+ }
+
+ temp = readl(USB_USBCMD);
+ temp &= ~ASYNC_INTR_CTRL;
+ temp &= ~ULPI_STP_CTRL;
+ writel(temp, USB_USBCMD);
+
+ /*
+ * PHY comes out of low power mode (LPM) in case of wakeup
+ * from asynchronous interrupt.
+ */
+ if (!(readl(USB_PORTSC) & PORTSC_PHCD))
+ goto skip_phy_resume;
+
+ writel(readl(USB_PORTSC) & ~PORTSC_PHCD, USB_PORTSC);
+ while (cnt < PHY_RESUME_TIMEOUT_USEC) {
+ if (!(readl(USB_PORTSC) & PORTSC_PHCD))
+ break;
+ udelay(1);
+ cnt++;
+ }
+
+ if (cnt >= PHY_RESUME_TIMEOUT_USEC) {
+ /*
+ * This is a fatal error. Reset the link and
+ * PHY. USB state can not be restored. Re-insertion
+ * of USB cable is the only way to get USB working.
+ */
+ dev_err(phy->dev, "Unable to resume USB."
+ "Re-plugin the cable\n");
+ msm_otg_reset(phy);
+ }
+
+skip_phy_resume:
+ if (device_may_wakeup(phy->dev))
+ disable_irq_wake(motg->irq);
+ if (bus)
+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
+
+ atomic_set(&motg->in_lpm, 0);
+
+ if (motg->async_int) {
+ motg->async_int = 0;
+ pm_runtime_put(phy->dev);
+ enable_irq(motg->irq);
+ }
+
+ dev_info(phy->dev, "USB exited from low power mode\n");
+
+ return 0;
+}
+#endif
+
+static void msm_otg_notify_charger(struct msm_otg *motg, unsigned mA)
+{
+ if (motg->cur_power == mA)
+ return;
+
+ /* TODO: Notify PMIC about available current */
+ dev_info(motg->phy.dev, "Avail curr from USB = %u\n", mA);
+ motg->cur_power = mA;
+}
+
+static int msm_otg_set_power(struct usb_phy *phy, unsigned mA)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+
+ /*
+ * Gadget driver uses set_power method to notify about the
+ * available current based on suspend/configured states.
+ *
+ * IDEV_CHG can be drawn irrespective of suspend/un-configured
+ * states when CDP/ACA is connected.
+ */
+ if (motg->chg_type == USB_SDP_CHARGER)
+ msm_otg_notify_charger(motg, mA);
+
+ return 0;
+}
+
+static void msm_otg_start_host(struct usb_phy *phy, int on)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ struct msm_otg_platform_data *pdata = motg->pdata;
+ struct usb_hcd *hcd;
+
+ if (!phy->otg->host)
+ return;
+
+ hcd = bus_to_hcd(phy->otg->host);
+
+ if (on) {
+ dev_dbg(phy->dev, "host on\n");
+
+ if (pdata->vbus_power)
+ pdata->vbus_power(1);
+ /*
+ * Some boards have a switch cotrolled by gpio
+ * to enable/disable internal HUB. Enable internal
+ * HUB before kicking the host.
+ */
+ if (pdata->setup_gpio)
+ pdata->setup_gpio(OTG_STATE_A_HOST);
+#ifdef CONFIG_USB
+ usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+#endif
+ } else {
+ dev_dbg(phy->dev, "host off\n");
+
+#ifdef CONFIG_USB
+ usb_remove_hcd(hcd);
+#endif
+ if (pdata->setup_gpio)
+ pdata->setup_gpio(OTG_STATE_UNDEFINED);
+ if (pdata->vbus_power)
+ pdata->vbus_power(0);
+ }
+}
+
+static int msm_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct msm_otg *motg = container_of(otg->phy, struct msm_otg, phy);
+ struct usb_hcd *hcd;
+
+ /*
+ * Fail host registration if this board can support
+ * only peripheral configuration.
+ */
+ if (motg->pdata->mode == USB_PERIPHERAL) {
+ dev_info(otg->phy->dev, "Host mode is not supported\n");
+ return -ENODEV;
+ }
+
+ if (!host) {
+ if (otg->phy->state == OTG_STATE_A_HOST) {
+ pm_runtime_get_sync(otg->phy->dev);
+ msm_otg_start_host(otg->phy, 0);
+ otg->host = NULL;
+ otg->phy->state = OTG_STATE_UNDEFINED;
+ schedule_work(&motg->sm_work);
+ } else {
+ otg->host = NULL;
+ }
+
+ return 0;
+ }
+
+ hcd = bus_to_hcd(host);
+ hcd->power_budget = motg->pdata->power_budget;
+
+ otg->host = host;
+ dev_dbg(otg->phy->dev, "host driver registered w/ tranceiver\n");
+
+ /*
+ * Kick the state machine work, if peripheral is not supported
+ * or peripheral is already registered with us.
+ */
+ if (motg->pdata->mode == USB_HOST || otg->gadget) {
+ pm_runtime_get_sync(otg->phy->dev);
+ schedule_work(&motg->sm_work);
+ }
+
+ return 0;
+}
+
+static void msm_otg_start_peripheral(struct usb_phy *phy, int on)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ struct msm_otg_platform_data *pdata = motg->pdata;
+
+ if (!phy->otg->gadget)
+ return;
+
+ if (on) {
+ dev_dbg(phy->dev, "gadget on\n");
+ /*
+ * Some boards have a switch cotrolled by gpio
+ * to enable/disable internal HUB. Disable internal
+ * HUB before kicking the gadget.
+ */
+ if (pdata->setup_gpio)
+ pdata->setup_gpio(OTG_STATE_B_PERIPHERAL);
+ usb_gadget_vbus_connect(phy->otg->gadget);
+ } else {
+ dev_dbg(phy->dev, "gadget off\n");
+ usb_gadget_vbus_disconnect(phy->otg->gadget);
+ if (pdata->setup_gpio)
+ pdata->setup_gpio(OTG_STATE_UNDEFINED);
+ }
+
+}
+
+static int msm_otg_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct msm_otg *motg = container_of(otg->phy, struct msm_otg, phy);
+
+ /*
+ * Fail peripheral registration if this board can support
+ * only host configuration.
+ */
+ if (motg->pdata->mode == USB_HOST) {
+ dev_info(otg->phy->dev, "Peripheral mode is not supported\n");
+ return -ENODEV;
+ }
+
+ if (!gadget) {
+ if (otg->phy->state == OTG_STATE_B_PERIPHERAL) {
+ pm_runtime_get_sync(otg->phy->dev);
+ msm_otg_start_peripheral(otg->phy, 0);
+ otg->gadget = NULL;
+ otg->phy->state = OTG_STATE_UNDEFINED;
+ schedule_work(&motg->sm_work);
+ } else {
+ otg->gadget = NULL;
+ }
+
+ return 0;
+ }
+ otg->gadget = gadget;
+ dev_dbg(otg->phy->dev, "peripheral driver registered w/ tranceiver\n");
+
+ /*
+ * Kick the state machine work, if host is not supported
+ * or host is already registered with us.
+ */
+ if (motg->pdata->mode == USB_PERIPHERAL || otg->host) {
+ pm_runtime_get_sync(otg->phy->dev);
+ schedule_work(&motg->sm_work);
+ }
+
+ return 0;
+}
+
+static bool msm_chg_check_secondary_det(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 chg_det;
+ bool ret = false;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ ret = chg_det & (1 << 4);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x87);
+ ret = chg_det & 1;
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static void msm_chg_enable_secondary_det(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 chg_det;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ /* Turn off charger block */
+ chg_det |= ~(1 << 1);
+ ulpi_write(phy, chg_det, 0x34);
+ udelay(20);
+ /* control chg block via ULPI */
+ chg_det &= ~(1 << 3);
+ ulpi_write(phy, chg_det, 0x34);
+ /* put it in host mode for enabling D- source */
+ chg_det &= ~(1 << 2);
+ ulpi_write(phy, chg_det, 0x34);
+ /* Turn on chg detect block */
+ chg_det &= ~(1 << 1);
+ ulpi_write(phy, chg_det, 0x34);
+ udelay(20);
+ /* enable chg detection */
+ chg_det &= ~(1 << 0);
+ ulpi_write(phy, chg_det, 0x34);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ /*
+ * Configure DM as current source, DP as current sink
+ * and enable battery charging comparators.
+ */
+ ulpi_write(phy, 0x8, 0x85);
+ ulpi_write(phy, 0x2, 0x85);
+ ulpi_write(phy, 0x1, 0x85);
+ break;
+ default:
+ break;
+ }
+}
+
+static bool msm_chg_check_primary_det(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 chg_det;
+ bool ret = false;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ ret = chg_det & (1 << 4);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x87);
+ ret = chg_det & 1;
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static void msm_chg_enable_primary_det(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 chg_det;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ /* enable chg detection */
+ chg_det &= ~(1 << 0);
+ ulpi_write(phy, chg_det, 0x34);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ /*
+ * Configure DP as current source, DM as current sink
+ * and enable battery charging comparators.
+ */
+ ulpi_write(phy, 0x2, 0x85);
+ ulpi_write(phy, 0x1, 0x85);
+ break;
+ default:
+ break;
+ }
+}
+
+static bool msm_chg_check_dcd(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 line_state;
+ bool ret = false;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ line_state = ulpi_read(phy, 0x15);
+ ret = !(line_state & 1);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ line_state = ulpi_read(phy, 0x87);
+ ret = line_state & 2;
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static void msm_chg_disable_dcd(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 chg_det;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ chg_det &= ~(1 << 5);
+ ulpi_write(phy, chg_det, 0x34);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ ulpi_write(phy, 0x10, 0x86);
+ break;
+ default:
+ break;
+ }
+}
+
+static void msm_chg_enable_dcd(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 chg_det;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ /* Turn on D+ current source */
+ chg_det |= (1 << 5);
+ ulpi_write(phy, chg_det, 0x34);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ /* Data contact detection enable */
+ ulpi_write(phy, 0x10, 0x85);
+ break;
+ default:
+ break;
+ }
+}
+
+static void msm_chg_block_on(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 func_ctrl, chg_det;
+
+ /* put the controller in non-driving mode */
+ func_ctrl = ulpi_read(phy, ULPI_FUNC_CTRL);
+ func_ctrl &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
+ func_ctrl |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
+ ulpi_write(phy, func_ctrl, ULPI_FUNC_CTRL);
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ /* control chg block via ULPI */
+ chg_det &= ~(1 << 3);
+ ulpi_write(phy, chg_det, 0x34);
+ /* Turn on chg detect block */
+ chg_det &= ~(1 << 1);
+ ulpi_write(phy, chg_det, 0x34);
+ udelay(20);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ /* Clear charger detecting control bits */
+ ulpi_write(phy, 0x3F, 0x86);
+ /* Clear alt interrupt latch and enable bits */
+ ulpi_write(phy, 0x1F, 0x92);
+ ulpi_write(phy, 0x1F, 0x95);
+ udelay(100);
+ break;
+ default:
+ break;
+ }
+}
+
+static void msm_chg_block_off(struct msm_otg *motg)
+{
+ struct usb_phy *phy = &motg->phy;
+ u32 func_ctrl, chg_det;
+
+ switch (motg->pdata->phy_type) {
+ case CI_45NM_INTEGRATED_PHY:
+ chg_det = ulpi_read(phy, 0x34);
+ /* Turn off charger block */
+ chg_det |= ~(1 << 1);
+ ulpi_write(phy, chg_det, 0x34);
+ break;
+ case SNPS_28NM_INTEGRATED_PHY:
+ /* Clear charger detecting control bits */
+ ulpi_write(phy, 0x3F, 0x86);
+ /* Clear alt interrupt latch and enable bits */
+ ulpi_write(phy, 0x1F, 0x92);
+ ulpi_write(phy, 0x1F, 0x95);
+ break;
+ default:
+ break;
+ }
+
+ /* put the controller in normal mode */
+ func_ctrl = ulpi_read(phy, ULPI_FUNC_CTRL);
+ func_ctrl &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
+ func_ctrl |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
+ ulpi_write(phy, func_ctrl, ULPI_FUNC_CTRL);
+}
+
+#define MSM_CHG_DCD_POLL_TIME (100 * HZ/1000) /* 100 msec */
+#define MSM_CHG_DCD_MAX_RETRIES 6 /* Tdcd_tmout = 6 * 100 msec */
+#define MSM_CHG_PRIMARY_DET_TIME (40 * HZ/1000) /* TVDPSRC_ON */
+#define MSM_CHG_SECONDARY_DET_TIME (40 * HZ/1000) /* TVDMSRC_ON */
+static void msm_chg_detect_work(struct work_struct *w)
+{
+ struct msm_otg *motg = container_of(w, struct msm_otg, chg_work.work);
+ struct usb_phy *phy = &motg->phy;
+ bool is_dcd, tmout, vout;
+ unsigned long delay;
+
+ dev_dbg(phy->dev, "chg detection work\n");
+ switch (motg->chg_state) {
+ case USB_CHG_STATE_UNDEFINED:
+ pm_runtime_get_sync(phy->dev);
+ msm_chg_block_on(motg);
+ msm_chg_enable_dcd(motg);
+ motg->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
+ motg->dcd_retries = 0;
+ delay = MSM_CHG_DCD_POLL_TIME;
+ break;
+ case USB_CHG_STATE_WAIT_FOR_DCD:
+ is_dcd = msm_chg_check_dcd(motg);
+ tmout = ++motg->dcd_retries == MSM_CHG_DCD_MAX_RETRIES;
+ if (is_dcd || tmout) {
+ msm_chg_disable_dcd(motg);
+ msm_chg_enable_primary_det(motg);
+ delay = MSM_CHG_PRIMARY_DET_TIME;
+ motg->chg_state = USB_CHG_STATE_DCD_DONE;
+ } else {
+ delay = MSM_CHG_DCD_POLL_TIME;
+ }
+ break;
+ case USB_CHG_STATE_DCD_DONE:
+ vout = msm_chg_check_primary_det(motg);
+ if (vout) {
+ msm_chg_enable_secondary_det(motg);
+ delay = MSM_CHG_SECONDARY_DET_TIME;
+ motg->chg_state = USB_CHG_STATE_PRIMARY_DONE;
+ } else {
+ motg->chg_type = USB_SDP_CHARGER;
+ motg->chg_state = USB_CHG_STATE_DETECTED;
+ delay = 0;
+ }
+ break;
+ case USB_CHG_STATE_PRIMARY_DONE:
+ vout = msm_chg_check_secondary_det(motg);
+ if (vout)
+ motg->chg_type = USB_DCP_CHARGER;
+ else
+ motg->chg_type = USB_CDP_CHARGER;
+ motg->chg_state = USB_CHG_STATE_SECONDARY_DONE;
+ /* fall through */
+ case USB_CHG_STATE_SECONDARY_DONE:
+ motg->chg_state = USB_CHG_STATE_DETECTED;
+ case USB_CHG_STATE_DETECTED:
+ msm_chg_block_off(motg);
+ dev_dbg(phy->dev, "charger = %d\n", motg->chg_type);
+ schedule_work(&motg->sm_work);
+ return;
+ default:
+ return;
+ }
+
+ schedule_delayed_work(&motg->chg_work, delay);
+}
+
+/*
+ * We support OTG, Peripheral only and Host only configurations. In case
+ * of OTG, mode switch (host-->peripheral/peripheral-->host) can happen
+ * via Id pin status or user request (debugfs). Id/BSV interrupts are not
+ * enabled when switch is controlled by user and default mode is supplied
+ * by board file, which can be changed by userspace later.
+ */
+static void msm_otg_init_sm(struct msm_otg *motg)
+{
+ struct msm_otg_platform_data *pdata = motg->pdata;
+ u32 otgsc = readl(USB_OTGSC);
+
+ switch (pdata->mode) {
+ case USB_OTG:
+ if (pdata->otg_control == OTG_PHY_CONTROL) {
+ if (otgsc & OTGSC_ID)
+ set_bit(ID, &motg->inputs);
+ else
+ clear_bit(ID, &motg->inputs);
+
+ if (otgsc & OTGSC_BSV)
+ set_bit(B_SESS_VLD, &motg->inputs);
+ else
+ clear_bit(B_SESS_VLD, &motg->inputs);
+ } else if (pdata->otg_control == OTG_USER_CONTROL) {
+ if (pdata->default_mode == USB_HOST) {
+ clear_bit(ID, &motg->inputs);
+ } else if (pdata->default_mode == USB_PERIPHERAL) {
+ set_bit(ID, &motg->inputs);
+ set_bit(B_SESS_VLD, &motg->inputs);
+ } else {
+ set_bit(ID, &motg->inputs);
+ clear_bit(B_SESS_VLD, &motg->inputs);
+ }
+ }
+ break;
+ case USB_HOST:
+ clear_bit(ID, &motg->inputs);
+ break;
+ case USB_PERIPHERAL:
+ set_bit(ID, &motg->inputs);
+ if (otgsc & OTGSC_BSV)
+ set_bit(B_SESS_VLD, &motg->inputs);
+ else
+ clear_bit(B_SESS_VLD, &motg->inputs);
+ break;
+ default:
+ break;
+ }
+}
+
+static void msm_otg_sm_work(struct work_struct *w)
+{
+ struct msm_otg *motg = container_of(w, struct msm_otg, sm_work);
+ struct usb_otg *otg = motg->phy.otg;
+
+ switch (otg->phy->state) {
+ case OTG_STATE_UNDEFINED:
+ dev_dbg(otg->phy->dev, "OTG_STATE_UNDEFINED state\n");
+ msm_otg_reset(otg->phy);
+ msm_otg_init_sm(motg);
+ otg->phy->state = OTG_STATE_B_IDLE;
+ /* FALL THROUGH */
+ case OTG_STATE_B_IDLE:
+ dev_dbg(otg->phy->dev, "OTG_STATE_B_IDLE state\n");
+ if (!test_bit(ID, &motg->inputs) && otg->host) {
+ /* disable BSV bit */
+ writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC);
+ msm_otg_start_host(otg->phy, 1);
+ otg->phy->state = OTG_STATE_A_HOST;
+ } else if (test_bit(B_SESS_VLD, &motg->inputs)) {
+ switch (motg->chg_state) {
+ case USB_CHG_STATE_UNDEFINED:
+ msm_chg_detect_work(&motg->chg_work.work);
+ break;
+ case USB_CHG_STATE_DETECTED:
+ switch (motg->chg_type) {
+ case USB_DCP_CHARGER:
+ msm_otg_notify_charger(motg,
+ IDEV_CHG_MAX);
+ break;
+ case USB_CDP_CHARGER:
+ msm_otg_notify_charger(motg,
+ IDEV_CHG_MAX);
+ msm_otg_start_peripheral(otg->phy, 1);
+ otg->phy->state
+ = OTG_STATE_B_PERIPHERAL;
+ break;
+ case USB_SDP_CHARGER:
+ msm_otg_notify_charger(motg, IUNIT);
+ msm_otg_start_peripheral(otg->phy, 1);
+ otg->phy->state
+ = OTG_STATE_B_PERIPHERAL;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ } else {
+ /*
+ * If charger detection work is pending, decrement
+ * the pm usage counter to balance with the one that
+ * is incremented in charger detection work.
+ */
+ if (cancel_delayed_work_sync(&motg->chg_work)) {
+ pm_runtime_put_sync(otg->phy->dev);
+ msm_otg_reset(otg->phy);
+ }
+ msm_otg_notify_charger(motg, 0);
+ motg->chg_state = USB_CHG_STATE_UNDEFINED;
+ motg->chg_type = USB_INVALID_CHARGER;
+ }
+ pm_runtime_put_sync(otg->phy->dev);
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ dev_dbg(otg->phy->dev, "OTG_STATE_B_PERIPHERAL state\n");
+ if (!test_bit(B_SESS_VLD, &motg->inputs) ||
+ !test_bit(ID, &motg->inputs)) {
+ msm_otg_notify_charger(motg, 0);
+ msm_otg_start_peripheral(otg->phy, 0);
+ motg->chg_state = USB_CHG_STATE_UNDEFINED;
+ motg->chg_type = USB_INVALID_CHARGER;
+ otg->phy->state = OTG_STATE_B_IDLE;
+ msm_otg_reset(otg->phy);
+ schedule_work(w);
+ }
+ break;
+ case OTG_STATE_A_HOST:
+ dev_dbg(otg->phy->dev, "OTG_STATE_A_HOST state\n");
+ if (test_bit(ID, &motg->inputs)) {
+ msm_otg_start_host(otg->phy, 0);
+ otg->phy->state = OTG_STATE_B_IDLE;
+ msm_otg_reset(otg->phy);
+ schedule_work(w);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static irqreturn_t msm_otg_irq(int irq, void *data)
+{
+ struct msm_otg *motg = data;
+ struct usb_phy *phy = &motg->phy;
+ u32 otgsc = 0;
+
+ if (atomic_read(&motg->in_lpm)) {
+ disable_irq_nosync(irq);
+ motg->async_int = 1;
+ pm_runtime_get(phy->dev);
+ return IRQ_HANDLED;
+ }
+
+ otgsc = readl(USB_OTGSC);
+ if (!(otgsc & (OTGSC_IDIS | OTGSC_BSVIS)))
+ return IRQ_NONE;
+
+ if ((otgsc & OTGSC_IDIS) && (otgsc & OTGSC_IDIE)) {
+ if (otgsc & OTGSC_ID)
+ set_bit(ID, &motg->inputs);
+ else
+ clear_bit(ID, &motg->inputs);
+ dev_dbg(phy->dev, "ID set/clear\n");
+ pm_runtime_get_noresume(phy->dev);
+ } else if ((otgsc & OTGSC_BSVIS) && (otgsc & OTGSC_BSVIE)) {
+ if (otgsc & OTGSC_BSV)
+ set_bit(B_SESS_VLD, &motg->inputs);
+ else
+ clear_bit(B_SESS_VLD, &motg->inputs);
+ dev_dbg(phy->dev, "BSV set/clear\n");
+ pm_runtime_get_noresume(phy->dev);
+ }
+
+ writel(otgsc, USB_OTGSC);
+ schedule_work(&motg->sm_work);
+ return IRQ_HANDLED;
+}
+
+static int msm_otg_mode_show(struct seq_file *s, void *unused)
+{
+ struct msm_otg *motg = s->private;
+ struct usb_otg *otg = motg->phy.otg;
+
+ switch (otg->phy->state) {
+ case OTG_STATE_A_HOST:
+ seq_printf(s, "host\n");
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ seq_printf(s, "peripheral\n");
+ break;
+ default:
+ seq_printf(s, "none\n");
+ break;
+ }
+
+ return 0;
+}
+
+static int msm_otg_mode_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, msm_otg_mode_show, inode->i_private);
+}
+
+static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct msm_otg *motg = s->private;
+ char buf[16];
+ struct usb_otg *otg = motg->phy.otg;
+ int status = count;
+ enum usb_mode_type req_mode;
+
+ memset(buf, 0x00, sizeof(buf));
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) {
+ status = -EFAULT;
+ goto out;
+ }
+
+ if (!strncmp(buf, "host", 4)) {
+ req_mode = USB_HOST;
+ } else if (!strncmp(buf, "peripheral", 10)) {
+ req_mode = USB_PERIPHERAL;
+ } else if (!strncmp(buf, "none", 4)) {
+ req_mode = USB_NONE;
+ } else {
+ status = -EINVAL;
+ goto out;
+ }
+
+ switch (req_mode) {
+ case USB_NONE:
+ switch (otg->phy->state) {
+ case OTG_STATE_A_HOST:
+ case OTG_STATE_B_PERIPHERAL:
+ set_bit(ID, &motg->inputs);
+ clear_bit(B_SESS_VLD, &motg->inputs);
+ break;
+ default:
+ goto out;
+ }
+ break;
+ case USB_PERIPHERAL:
+ switch (otg->phy->state) {
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_A_HOST:
+ set_bit(ID, &motg->inputs);
+ set_bit(B_SESS_VLD, &motg->inputs);
+ break;
+ default:
+ goto out;
+ }
+ break;
+ case USB_HOST:
+ switch (otg->phy->state) {
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_B_PERIPHERAL:
+ clear_bit(ID, &motg->inputs);
+ break;
+ default:
+ goto out;
+ }
+ break;
+ default:
+ goto out;
+ }
+
+ pm_runtime_get_sync(otg->phy->dev);
+ schedule_work(&motg->sm_work);
+out:
+ return status;
+}
+
+const struct file_operations msm_otg_mode_fops = {
+ .open = msm_otg_mode_open,
+ .read = seq_read,
+ .write = msm_otg_mode_write,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct dentry *msm_otg_dbg_root;
+static struct dentry *msm_otg_dbg_mode;
+
+static int msm_otg_debugfs_init(struct msm_otg *motg)
+{
+ msm_otg_dbg_root = debugfs_create_dir("msm_otg", NULL);
+
+ if (!msm_otg_dbg_root || IS_ERR(msm_otg_dbg_root))
+ return -ENODEV;
+
+ msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO | S_IWUSR,
+ msm_otg_dbg_root, motg, &msm_otg_mode_fops);
+ if (!msm_otg_dbg_mode) {
+ debugfs_remove(msm_otg_dbg_root);
+ msm_otg_dbg_root = NULL;
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void msm_otg_debugfs_cleanup(void)
+{
+ debugfs_remove(msm_otg_dbg_mode);
+ debugfs_remove(msm_otg_dbg_root);
+}
+
+static int __init msm_otg_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct resource *res;
+ struct msm_otg *motg;
+ struct usb_phy *phy;
+
+ dev_info(&pdev->dev, "msm_otg probe\n");
+ if (!pdev->dev.platform_data) {
+ dev_err(&pdev->dev, "No platform data given. Bailing out\n");
+ return -ENODEV;
+ }
+
+ motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL);
+ if (!motg) {
+ dev_err(&pdev->dev, "unable to allocate msm_otg\n");
+ return -ENOMEM;
+ }
+
+ motg->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
+ if (!motg->phy.otg) {
+ dev_err(&pdev->dev, "unable to allocate msm_otg\n");
+ return -ENOMEM;
+ }
+
+ motg->pdata = pdev->dev.platform_data;
+ phy = &motg->phy;
+ phy->dev = &pdev->dev;
+
+ motg->phy_reset_clk = clk_get(&pdev->dev, "usb_phy_clk");
+ if (IS_ERR(motg->phy_reset_clk)) {
+ dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
+ ret = PTR_ERR(motg->phy_reset_clk);
+ goto free_motg;
+ }
+
+ motg->clk = clk_get(&pdev->dev, "usb_hs_clk");
+ if (IS_ERR(motg->clk)) {
+ dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
+ ret = PTR_ERR(motg->clk);
+ goto put_phy_reset_clk;
+ }
+ clk_set_rate(motg->clk, 60000000);
+
+ /*
+ * If USB Core is running its protocol engine based on CORE CLK,
+ * CORE CLK must be running at >55Mhz for correct HSUSB
+ * operation and USB core cannot tolerate frequency changes on
+ * CORE CLK. For such USB cores, vote for maximum clk frequency
+ * on pclk source
+ */
+ if (motg->pdata->pclk_src_name) {
+ motg->pclk_src = clk_get(&pdev->dev,
+ motg->pdata->pclk_src_name);
+ if (IS_ERR(motg->pclk_src))
+ goto put_clk;
+ clk_set_rate(motg->pclk_src, INT_MAX);
+ clk_enable(motg->pclk_src);
+ } else
+ motg->pclk_src = ERR_PTR(-ENOENT);
+
+
+ motg->pclk = clk_get(&pdev->dev, "usb_hs_pclk");
+ if (IS_ERR(motg->pclk)) {
+ dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
+ ret = PTR_ERR(motg->pclk);
+ goto put_pclk_src;
+ }
+
+ /*
+ * USB core clock is not present on all MSM chips. This
+ * clock is introduced to remove the dependency on AXI
+ * bus frequency.
+ */
+ motg->core_clk = clk_get(&pdev->dev, "usb_hs_core_clk");
+ if (IS_ERR(motg->core_clk))
+ motg->core_clk = NULL;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to get platform resource mem\n");
+ ret = -ENODEV;
+ goto put_core_clk;
+ }
+
+ motg->regs = ioremap(res->start, resource_size(res));
+ if (!motg->regs) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto put_core_clk;
+ }
+ dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
+
+ motg->irq = platform_get_irq(pdev, 0);
+ if (!motg->irq) {
+ dev_err(&pdev->dev, "platform_get_irq failed\n");
+ ret = -ENODEV;
+ goto free_regs;
+ }
+
+ clk_enable(motg->clk);
+ clk_enable(motg->pclk);
+
+ ret = msm_hsusb_init_vddcx(motg, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
+ goto free_regs;
+ }
+
+ ret = msm_hsusb_ldo_init(motg, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
+ goto vddcx_exit;
+ }
+ ret = msm_hsusb_ldo_set_mode(1);
+ if (ret) {
+ dev_err(&pdev->dev, "hsusb vreg enable failed\n");
+ goto ldo_exit;
+ }
+
+ if (motg->core_clk)
+ clk_enable(motg->core_clk);
+
+ writel(0, USB_USBINTR);
+ writel(0, USB_OTGSC);
+
+ INIT_WORK(&motg->sm_work, msm_otg_sm_work);
+ INIT_DELAYED_WORK(&motg->chg_work, msm_chg_detect_work);
+ ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED,
+ "msm_otg", motg);
+ if (ret) {
+ dev_err(&pdev->dev, "request irq failed\n");
+ goto disable_clks;
+ }
+
+ phy->init = msm_otg_reset;
+ phy->set_power = msm_otg_set_power;
+
+ phy->io_ops = &msm_otg_io_ops;
+
+ phy->otg->phy = &motg->phy;
+ phy->otg->set_host = msm_otg_set_host;
+ phy->otg->set_peripheral = msm_otg_set_peripheral;
+
+ ret = usb_add_phy(&motg->phy, USB_PHY_TYPE_USB2);
+ if (ret) {
+ dev_err(&pdev->dev, "usb_add_phy failed\n");
+ goto free_irq;
+ }
+
+ platform_set_drvdata(pdev, motg);
+ device_init_wakeup(&pdev->dev, 1);
+
+ if (motg->pdata->mode == USB_OTG &&
+ motg->pdata->otg_control == OTG_USER_CONTROL) {
+ ret = msm_otg_debugfs_init(motg);
+ if (ret)
+ dev_dbg(&pdev->dev, "mode debugfs file is"
+ "not available\n");
+ }
+
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+free_irq:
+ free_irq(motg->irq, motg);
+disable_clks:
+ clk_disable(motg->pclk);
+ clk_disable(motg->clk);
+ldo_exit:
+ msm_hsusb_ldo_init(motg, 0);
+vddcx_exit:
+ msm_hsusb_init_vddcx(motg, 0);
+free_regs:
+ iounmap(motg->regs);
+put_core_clk:
+ if (motg->core_clk)
+ clk_put(motg->core_clk);
+ clk_put(motg->pclk);
+put_pclk_src:
+ if (!IS_ERR(motg->pclk_src)) {
+ clk_disable(motg->pclk_src);
+ clk_put(motg->pclk_src);
+ }
+put_clk:
+ clk_put(motg->clk);
+put_phy_reset_clk:
+ clk_put(motg->phy_reset_clk);
+free_motg:
+ kfree(motg->phy.otg);
+ kfree(motg);
+ return ret;
+}
+
+static int msm_otg_remove(struct platform_device *pdev)
+{
+ struct msm_otg *motg = platform_get_drvdata(pdev);
+ struct usb_phy *phy = &motg->phy;
+ int cnt = 0;
+
+ if (phy->otg->host || phy->otg->gadget)
+ return -EBUSY;
+
+ msm_otg_debugfs_cleanup();
+ cancel_delayed_work_sync(&motg->chg_work);
+ cancel_work_sync(&motg->sm_work);
+
+ pm_runtime_resume(&pdev->dev);
+
+ device_init_wakeup(&pdev->dev, 0);
+ pm_runtime_disable(&pdev->dev);
+
+ usb_remove_phy(phy);
+ free_irq(motg->irq, motg);
+
+ /*
+ * Put PHY in low power mode.
+ */
+ ulpi_read(phy, 0x14);
+ ulpi_write(phy, 0x08, 0x09);
+
+ writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC);
+ while (cnt < PHY_SUSPEND_TIMEOUT_USEC) {
+ if (readl(USB_PORTSC) & PORTSC_PHCD)
+ break;
+ udelay(1);
+ cnt++;
+ }
+ if (cnt >= PHY_SUSPEND_TIMEOUT_USEC)
+ dev_err(phy->dev, "Unable to suspend PHY\n");
+
+ clk_disable(motg->pclk);
+ clk_disable(motg->clk);
+ if (motg->core_clk)
+ clk_disable(motg->core_clk);
+ if (!IS_ERR(motg->pclk_src)) {
+ clk_disable(motg->pclk_src);
+ clk_put(motg->pclk_src);
+ }
+ msm_hsusb_ldo_init(motg, 0);
+
+ iounmap(motg->regs);
+ pm_runtime_set_suspended(&pdev->dev);
+
+ clk_put(motg->phy_reset_clk);
+ clk_put(motg->pclk);
+ clk_put(motg->clk);
+ if (motg->core_clk)
+ clk_put(motg->core_clk);
+
+ kfree(motg->phy.otg);
+ kfree(motg);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int msm_otg_runtime_idle(struct device *dev)
+{
+ struct msm_otg *motg = dev_get_drvdata(dev);
+ struct usb_otg *otg = motg->phy.otg;
+
+ dev_dbg(dev, "OTG runtime idle\n");
+
+ /*
+ * It is observed some times that a spurious interrupt
+ * comes when PHY is put into LPM immediately after PHY reset.
+ * This 1 sec delay also prevents entering into LPM immediately
+ * after asynchronous interrupt.
+ */
+ if (otg->phy->state != OTG_STATE_UNDEFINED)
+ pm_schedule_suspend(dev, 1000);
+
+ return -EAGAIN;
+}
+
+static int msm_otg_runtime_suspend(struct device *dev)
+{
+ struct msm_otg *motg = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "OTG runtime suspend\n");
+ return msm_otg_suspend(motg);
+}
+
+static int msm_otg_runtime_resume(struct device *dev)
+{
+ struct msm_otg *motg = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "OTG runtime resume\n");
+ return msm_otg_resume(motg);
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int msm_otg_pm_suspend(struct device *dev)
+{
+ struct msm_otg *motg = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "OTG PM suspend\n");
+ return msm_otg_suspend(motg);
+}
+
+static int msm_otg_pm_resume(struct device *dev)
+{
+ struct msm_otg *motg = dev_get_drvdata(dev);
+ int ret;
+
+ dev_dbg(dev, "OTG PM resume\n");
+
+ ret = msm_otg_resume(motg);
+ if (ret)
+ return ret;
+
+ /*
+ * Runtime PM Documentation recommends bringing the
+ * device to full powered state upon resume.
+ */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops msm_otg_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(msm_otg_pm_suspend, msm_otg_pm_resume)
+ SET_RUNTIME_PM_OPS(msm_otg_runtime_suspend, msm_otg_runtime_resume,
+ msm_otg_runtime_idle)
+};
+#endif
+
+static struct platform_driver msm_otg_driver = {
+ .remove = msm_otg_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &msm_otg_dev_pm_ops,
+#endif
+ },
+};
+
+module_platform_driver_probe(msm_otg_driver, msm_otg_probe);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MSM USB transceiver driver");
--- /dev/null
+/*
+ * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
+ * Author: Chao Xie <chao.xie@marvell.com>
+ * Neil Zhang <zhangwm@marvell.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/device.h>
+#include <linux/proc_fs.h>
+#include <linux/clk.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/hcd.h>
+#include <linux/platform_data/mv_usb.h>
+
+#include "mv_otg.h"
+
+#define DRIVER_DESC "Marvell USB OTG transceiver driver"
+#define DRIVER_VERSION "Jan 20, 2010"
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+static const char driver_name[] = "mv-otg";
+
+static char *state_string[] = {
+ "undefined",
+ "b_idle",
+ "b_srp_init",
+ "b_peripheral",
+ "b_wait_acon",
+ "b_host",
+ "a_idle",
+ "a_wait_vrise",
+ "a_wait_bcon",
+ "a_host",
+ "a_suspend",
+ "a_peripheral",
+ "a_wait_vfall",
+ "a_vbus_err"
+};
+
+static int mv_otg_set_vbus(struct usb_otg *otg, bool on)
+{
+ struct mv_otg *mvotg = container_of(otg->phy, struct mv_otg, phy);
+ if (mvotg->pdata->set_vbus == NULL)
+ return -ENODEV;
+
+ return mvotg->pdata->set_vbus(on);
+}
+
+static int mv_otg_set_host(struct usb_otg *otg,
+ struct usb_bus *host)
+{
+ otg->host = host;
+
+ return 0;
+}
+
+static int mv_otg_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ otg->gadget = gadget;
+
+ return 0;
+}
+
+static void mv_otg_run_state_machine(struct mv_otg *mvotg,
+ unsigned long delay)
+{
+ dev_dbg(&mvotg->pdev->dev, "transceiver is updated\n");
+ if (!mvotg->qwork)
+ return;
+
+ queue_delayed_work(mvotg->qwork, &mvotg->work, delay);
+}
+
+static void mv_otg_timer_await_bcon(unsigned long data)
+{
+ struct mv_otg *mvotg = (struct mv_otg *) data;
+
+ mvotg->otg_ctrl.a_wait_bcon_timeout = 1;
+
+ dev_info(&mvotg->pdev->dev, "B Device No Response!\n");
+
+ if (spin_trylock(&mvotg->wq_lock)) {
+ mv_otg_run_state_machine(mvotg, 0);
+ spin_unlock(&mvotg->wq_lock);
+ }
+}
+
+static int mv_otg_cancel_timer(struct mv_otg *mvotg, unsigned int id)
+{
+ struct timer_list *timer;
+
+ if (id >= OTG_TIMER_NUM)
+ return -EINVAL;
+
+ timer = &mvotg->otg_ctrl.timer[id];
+
+ if (timer_pending(timer))
+ del_timer(timer);
+
+ return 0;
+}
+
+static int mv_otg_set_timer(struct mv_otg *mvotg, unsigned int id,
+ unsigned long interval,
+ void (*callback) (unsigned long))
+{
+ struct timer_list *timer;
+
+ if (id >= OTG_TIMER_NUM)
+ return -EINVAL;
+
+ timer = &mvotg->otg_ctrl.timer[id];
+ if (timer_pending(timer)) {
+ dev_err(&mvotg->pdev->dev, "Timer%d is already running\n", id);
+ return -EBUSY;
+ }
+
+ init_timer(timer);
+ timer->data = (unsigned long) mvotg;
+ timer->function = callback;
+ timer->expires = jiffies + interval;
+ add_timer(timer);
+
+ return 0;
+}
+
+static int mv_otg_reset(struct mv_otg *mvotg)
+{
+ unsigned int loops;
+ u32 tmp;
+
+ /* Stop the controller */
+ tmp = readl(&mvotg->op_regs->usbcmd);
+ tmp &= ~USBCMD_RUN_STOP;
+ writel(tmp, &mvotg->op_regs->usbcmd);
+
+ /* Reset the controller to get default values */
+ writel(USBCMD_CTRL_RESET, &mvotg->op_regs->usbcmd);
+
+ loops = 500;
+ while (readl(&mvotg->op_regs->usbcmd) & USBCMD_CTRL_RESET) {
+ if (loops == 0) {
+ dev_err(&mvotg->pdev->dev,
+ "Wait for RESET completed TIMEOUT\n");
+ return -ETIMEDOUT;
+ }
+ loops--;
+ udelay(20);
+ }
+
+ writel(0x0, &mvotg->op_regs->usbintr);
+ tmp = readl(&mvotg->op_regs->usbsts);
+ writel(tmp, &mvotg->op_regs->usbsts);
+
+ return 0;
+}
+
+static void mv_otg_init_irq(struct mv_otg *mvotg)
+{
+ u32 otgsc;
+
+ mvotg->irq_en = OTGSC_INTR_A_SESSION_VALID
+ | OTGSC_INTR_A_VBUS_VALID;
+ mvotg->irq_status = OTGSC_INTSTS_A_SESSION_VALID
+ | OTGSC_INTSTS_A_VBUS_VALID;
+
+ if (mvotg->pdata->vbus == NULL) {
+ mvotg->irq_en |= OTGSC_INTR_B_SESSION_VALID
+ | OTGSC_INTR_B_SESSION_END;
+ mvotg->irq_status |= OTGSC_INTSTS_B_SESSION_VALID
+ | OTGSC_INTSTS_B_SESSION_END;
+ }
+
+ if (mvotg->pdata->id == NULL) {
+ mvotg->irq_en |= OTGSC_INTR_USB_ID;
+ mvotg->irq_status |= OTGSC_INTSTS_USB_ID;
+ }
+
+ otgsc = readl(&mvotg->op_regs->otgsc);
+ otgsc |= mvotg->irq_en;
+ writel(otgsc, &mvotg->op_regs->otgsc);
+}
+
+static void mv_otg_start_host(struct mv_otg *mvotg, int on)
+{
+#ifdef CONFIG_USB
+ struct usb_otg *otg = mvotg->phy.otg;
+ struct usb_hcd *hcd;
+
+ if (!otg->host)
+ return;
+
+ dev_info(&mvotg->pdev->dev, "%s host\n", on ? "start" : "stop");
+
+ hcd = bus_to_hcd(otg->host);
+
+ if (on)
+ usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+ else
+ usb_remove_hcd(hcd);
+#endif /* CONFIG_USB */
+}
+
+static void mv_otg_start_periphrals(struct mv_otg *mvotg, int on)
+{
+ struct usb_otg *otg = mvotg->phy.otg;
+
+ if (!otg->gadget)
+ return;
+
+ dev_info(mvotg->phy.dev, "gadget %s\n", on ? "on" : "off");
+
+ if (on)
+ usb_gadget_vbus_connect(otg->gadget);
+ else
+ usb_gadget_vbus_disconnect(otg->gadget);
+}
+
+static void otg_clock_enable(struct mv_otg *mvotg)
+{
+ unsigned int i;
+
+ for (i = 0; i < mvotg->clknum; i++)
+ clk_prepare_enable(mvotg->clk[i]);
+}
+
+static void otg_clock_disable(struct mv_otg *mvotg)
+{
+ unsigned int i;
+
+ for (i = 0; i < mvotg->clknum; i++)
+ clk_disable_unprepare(mvotg->clk[i]);
+}
+
+static int mv_otg_enable_internal(struct mv_otg *mvotg)
+{
+ int retval = 0;
+
+ if (mvotg->active)
+ return 0;
+
+ dev_dbg(&mvotg->pdev->dev, "otg enabled\n");
+
+ otg_clock_enable(mvotg);
+ if (mvotg->pdata->phy_init) {
+ retval = mvotg->pdata->phy_init(mvotg->phy_regs);
+ if (retval) {
+ dev_err(&mvotg->pdev->dev,
+ "init phy error %d\n", retval);
+ otg_clock_disable(mvotg);
+ return retval;
+ }
+ }
+ mvotg->active = 1;
+
+ return 0;
+
+}
+
+static int mv_otg_enable(struct mv_otg *mvotg)
+{
+ if (mvotg->clock_gating)
+ return mv_otg_enable_internal(mvotg);
+
+ return 0;
+}
+
+static void mv_otg_disable_internal(struct mv_otg *mvotg)
+{
+ if (mvotg->active) {
+ dev_dbg(&mvotg->pdev->dev, "otg disabled\n");
+ if (mvotg->pdata->phy_deinit)
+ mvotg->pdata->phy_deinit(mvotg->phy_regs);
+ otg_clock_disable(mvotg);
+ mvotg->active = 0;
+ }
+}
+
+static void mv_otg_disable(struct mv_otg *mvotg)
+{
+ if (mvotg->clock_gating)
+ mv_otg_disable_internal(mvotg);
+}
+
+static void mv_otg_update_inputs(struct mv_otg *mvotg)
+{
+ struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
+ u32 otgsc;
+
+ otgsc = readl(&mvotg->op_regs->otgsc);
+
+ if (mvotg->pdata->vbus) {
+ if (mvotg->pdata->vbus->poll() == VBUS_HIGH) {
+ otg_ctrl->b_sess_vld = 1;
+ otg_ctrl->b_sess_end = 0;
+ } else {
+ otg_ctrl->b_sess_vld = 0;
+ otg_ctrl->b_sess_end = 1;
+ }
+ } else {
+ otg_ctrl->b_sess_vld = !!(otgsc & OTGSC_STS_B_SESSION_VALID);
+ otg_ctrl->b_sess_end = !!(otgsc & OTGSC_STS_B_SESSION_END);
+ }
+
+ if (mvotg->pdata->id)
+ otg_ctrl->id = !!mvotg->pdata->id->poll();
+ else
+ otg_ctrl->id = !!(otgsc & OTGSC_STS_USB_ID);
+
+ if (mvotg->pdata->otg_force_a_bus_req && !otg_ctrl->id)
+ otg_ctrl->a_bus_req = 1;
+
+ otg_ctrl->a_sess_vld = !!(otgsc & OTGSC_STS_A_SESSION_VALID);
+ otg_ctrl->a_vbus_vld = !!(otgsc & OTGSC_STS_A_VBUS_VALID);
+
+ dev_dbg(&mvotg->pdev->dev, "%s: ", __func__);
+ dev_dbg(&mvotg->pdev->dev, "id %d\n", otg_ctrl->id);
+ dev_dbg(&mvotg->pdev->dev, "b_sess_vld %d\n", otg_ctrl->b_sess_vld);
+ dev_dbg(&mvotg->pdev->dev, "b_sess_end %d\n", otg_ctrl->b_sess_end);
+ dev_dbg(&mvotg->pdev->dev, "a_vbus_vld %d\n", otg_ctrl->a_vbus_vld);
+ dev_dbg(&mvotg->pdev->dev, "a_sess_vld %d\n", otg_ctrl->a_sess_vld);
+}
+
+static void mv_otg_update_state(struct mv_otg *mvotg)
+{
+ struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
+ struct usb_phy *phy = &mvotg->phy;
+ int old_state = phy->state;
+
+ switch (old_state) {
+ case OTG_STATE_UNDEFINED:
+ phy->state = OTG_STATE_B_IDLE;
+ /* FALL THROUGH */
+ case OTG_STATE_B_IDLE:
+ if (otg_ctrl->id == 0)
+ phy->state = OTG_STATE_A_IDLE;
+ else if (otg_ctrl->b_sess_vld)
+ phy->state = OTG_STATE_B_PERIPHERAL;
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ if (!otg_ctrl->b_sess_vld || otg_ctrl->id == 0)
+ phy->state = OTG_STATE_B_IDLE;
+ break;
+ case OTG_STATE_A_IDLE:
+ if (otg_ctrl->id)
+ phy->state = OTG_STATE_B_IDLE;
+ else if (!(otg_ctrl->a_bus_drop) &&
+ (otg_ctrl->a_bus_req || otg_ctrl->a_srp_det))
+ phy->state = OTG_STATE_A_WAIT_VRISE;
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ if (otg_ctrl->a_vbus_vld)
+ phy->state = OTG_STATE_A_WAIT_BCON;
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ if (otg_ctrl->id || otg_ctrl->a_bus_drop
+ || otg_ctrl->a_wait_bcon_timeout) {
+ mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
+ mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
+ phy->state = OTG_STATE_A_WAIT_VFALL;
+ otg_ctrl->a_bus_req = 0;
+ } else if (!otg_ctrl->a_vbus_vld) {
+ mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
+ mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
+ phy->state = OTG_STATE_A_VBUS_ERR;
+ } else if (otg_ctrl->b_conn) {
+ mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
+ mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
+ phy->state = OTG_STATE_A_HOST;
+ }
+ break;
+ case OTG_STATE_A_HOST:
+ if (otg_ctrl->id || !otg_ctrl->b_conn
+ || otg_ctrl->a_bus_drop)
+ phy->state = OTG_STATE_A_WAIT_BCON;
+ else if (!otg_ctrl->a_vbus_vld)
+ phy->state = OTG_STATE_A_VBUS_ERR;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ if (otg_ctrl->id
+ || (!otg_ctrl->b_conn && otg_ctrl->a_sess_vld)
+ || otg_ctrl->a_bus_req)
+ phy->state = OTG_STATE_A_IDLE;
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ if (otg_ctrl->id || otg_ctrl->a_clr_err
+ || otg_ctrl->a_bus_drop) {
+ otg_ctrl->a_clr_err = 0;
+ phy->state = OTG_STATE_A_WAIT_VFALL;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static void mv_otg_work(struct work_struct *work)
+{
+ struct mv_otg *mvotg;
+ struct usb_phy *phy;
+ struct usb_otg *otg;
+ int old_state;
+
+ mvotg = container_of(to_delayed_work(work), struct mv_otg, work);
+
+run:
+ /* work queue is single thread, or we need spin_lock to protect */
+ phy = &mvotg->phy;
+ otg = phy->otg;
+ old_state = phy->state;
+
+ if (!mvotg->active)
+ return;
+
+ mv_otg_update_inputs(mvotg);
+ mv_otg_update_state(mvotg);
+
+ if (old_state != phy->state) {
+ dev_info(&mvotg->pdev->dev, "change from state %s to %s\n",
+ state_string[old_state],
+ state_string[phy->state]);
+
+ switch (phy->state) {
+ case OTG_STATE_B_IDLE:
+ otg->default_a = 0;
+ if (old_state == OTG_STATE_B_PERIPHERAL)
+ mv_otg_start_periphrals(mvotg, 0);
+ mv_otg_reset(mvotg);
+ mv_otg_disable(mvotg);
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ mv_otg_enable(mvotg);
+ mv_otg_start_periphrals(mvotg, 1);
+ break;
+ case OTG_STATE_A_IDLE:
+ otg->default_a = 1;
+ mv_otg_enable(mvotg);
+ if (old_state == OTG_STATE_A_WAIT_VFALL)
+ mv_otg_start_host(mvotg, 0);
+ mv_otg_reset(mvotg);
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ mv_otg_set_vbus(otg, 1);
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ if (old_state != OTG_STATE_A_HOST)
+ mv_otg_start_host(mvotg, 1);
+ mv_otg_set_timer(mvotg, A_WAIT_BCON_TIMER,
+ T_A_WAIT_BCON,
+ mv_otg_timer_await_bcon);
+ /*
+ * Now, we directly enter A_HOST. So set b_conn = 1
+ * here. In fact, it need host driver to notify us.
+ */
+ mvotg->otg_ctrl.b_conn = 1;
+ break;
+ case OTG_STATE_A_HOST:
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ /*
+ * Now, we has exited A_HOST. So set b_conn = 0
+ * here. In fact, it need host driver to notify us.
+ */
+ mvotg->otg_ctrl.b_conn = 0;
+ mv_otg_set_vbus(otg, 0);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ break;
+ default:
+ break;
+ }
+ goto run;
+ }
+}
+
+static irqreturn_t mv_otg_irq(int irq, void *dev)
+{
+ struct mv_otg *mvotg = dev;
+ u32 otgsc;
+
+ otgsc = readl(&mvotg->op_regs->otgsc);
+ writel(otgsc, &mvotg->op_regs->otgsc);
+
+ /*
+ * if we have vbus, then the vbus detection for B-device
+ * will be done by mv_otg_inputs_irq().
+ */
+ if (mvotg->pdata->vbus)
+ if ((otgsc & OTGSC_STS_USB_ID) &&
+ !(otgsc & OTGSC_INTSTS_USB_ID))
+ return IRQ_NONE;
+
+ if ((otgsc & mvotg->irq_status) == 0)
+ return IRQ_NONE;
+
+ mv_otg_run_state_machine(mvotg, 0);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mv_otg_inputs_irq(int irq, void *dev)
+{
+ struct mv_otg *mvotg = dev;
+
+ /* The clock may disabled at this time */
+ if (!mvotg->active) {
+ mv_otg_enable(mvotg);
+ mv_otg_init_irq(mvotg);
+ }
+
+ mv_otg_run_state_machine(mvotg, 0);
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t
+get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mv_otg *mvotg = dev_get_drvdata(dev);
+ return scnprintf(buf, PAGE_SIZE, "%d\n",
+ mvotg->otg_ctrl.a_bus_req);
+}
+
+static ssize_t
+set_a_bus_req(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mv_otg *mvotg = dev_get_drvdata(dev);
+
+ if (count > 2)
+ return -1;
+
+ /* We will use this interface to change to A device */
+ if (mvotg->phy.state != OTG_STATE_B_IDLE
+ && mvotg->phy.state != OTG_STATE_A_IDLE)
+ return -1;
+
+ /* The clock may disabled and we need to set irq for ID detected */
+ mv_otg_enable(mvotg);
+ mv_otg_init_irq(mvotg);
+
+ if (buf[0] == '1') {
+ mvotg->otg_ctrl.a_bus_req = 1;
+ mvotg->otg_ctrl.a_bus_drop = 0;
+ dev_dbg(&mvotg->pdev->dev,
+ "User request: a_bus_req = 1\n");
+
+ if (spin_trylock(&mvotg->wq_lock)) {
+ mv_otg_run_state_machine(mvotg, 0);
+ spin_unlock(&mvotg->wq_lock);
+ }
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUSR, get_a_bus_req,
+ set_a_bus_req);
+
+static ssize_t
+set_a_clr_err(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mv_otg *mvotg = dev_get_drvdata(dev);
+ if (!mvotg->phy.otg->default_a)
+ return -1;
+
+ if (count > 2)
+ return -1;
+
+ if (buf[0] == '1') {
+ mvotg->otg_ctrl.a_clr_err = 1;
+ dev_dbg(&mvotg->pdev->dev,
+ "User request: a_clr_err = 1\n");
+ }
+
+ if (spin_trylock(&mvotg->wq_lock)) {
+ mv_otg_run_state_machine(mvotg, 0);
+ spin_unlock(&mvotg->wq_lock);
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(a_clr_err, S_IWUSR, NULL, set_a_clr_err);
+
+static ssize_t
+get_a_bus_drop(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mv_otg *mvotg = dev_get_drvdata(dev);
+ return scnprintf(buf, PAGE_SIZE, "%d\n",
+ mvotg->otg_ctrl.a_bus_drop);
+}
+
+static ssize_t
+set_a_bus_drop(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mv_otg *mvotg = dev_get_drvdata(dev);
+ if (!mvotg->phy.otg->default_a)
+ return -1;
+
+ if (count > 2)
+ return -1;
+
+ if (buf[0] == '0') {
+ mvotg->otg_ctrl.a_bus_drop = 0;
+ dev_dbg(&mvotg->pdev->dev,
+ "User request: a_bus_drop = 0\n");
+ } else if (buf[0] == '1') {
+ mvotg->otg_ctrl.a_bus_drop = 1;
+ mvotg->otg_ctrl.a_bus_req = 0;
+ dev_dbg(&mvotg->pdev->dev,
+ "User request: a_bus_drop = 1\n");
+ dev_dbg(&mvotg->pdev->dev,
+ "User request: and a_bus_req = 0\n");
+ }
+
+ if (spin_trylock(&mvotg->wq_lock)) {
+ mv_otg_run_state_machine(mvotg, 0);
+ spin_unlock(&mvotg->wq_lock);
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUSR,
+ get_a_bus_drop, set_a_bus_drop);
+
+static struct attribute *inputs_attrs[] = {
+ &dev_attr_a_bus_req.attr,
+ &dev_attr_a_clr_err.attr,
+ &dev_attr_a_bus_drop.attr,
+ NULL,
+};
+
+static struct attribute_group inputs_attr_group = {
+ .name = "inputs",
+ .attrs = inputs_attrs,
+};
+
+int mv_otg_remove(struct platform_device *pdev)
+{
+ struct mv_otg *mvotg = platform_get_drvdata(pdev);
+
+ sysfs_remove_group(&mvotg->pdev->dev.kobj, &inputs_attr_group);
+
+ if (mvotg->qwork) {
+ flush_workqueue(mvotg->qwork);
+ destroy_workqueue(mvotg->qwork);
+ }
+
+ mv_otg_disable(mvotg);
+
+ usb_remove_phy(&mvotg->phy);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static int mv_otg_probe(struct platform_device *pdev)
+{
+ struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
+ struct mv_otg *mvotg;
+ struct usb_otg *otg;
+ struct resource *r;
+ int retval = 0, clk_i, i;
+ size_t size;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "failed to get platform data\n");
+ return -ENODEV;
+ }
+
+ size = sizeof(*mvotg) + sizeof(struct clk *) * pdata->clknum;
+ mvotg = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (!mvotg) {
+ dev_err(&pdev->dev, "failed to allocate memory!\n");
+ return -ENOMEM;
+ }
+
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, mvotg);
+
+ mvotg->pdev = pdev;
+ mvotg->pdata = pdata;
+
+ mvotg->clknum = pdata->clknum;
+ for (clk_i = 0; clk_i < mvotg->clknum; clk_i++) {
+ mvotg->clk[clk_i] = devm_clk_get(&pdev->dev,
+ pdata->clkname[clk_i]);
+ if (IS_ERR(mvotg->clk[clk_i])) {
+ retval = PTR_ERR(mvotg->clk[clk_i]);
+ return retval;
+ }
+ }
+
+ mvotg->qwork = create_singlethread_workqueue("mv_otg_queue");
+ if (!mvotg->qwork) {
+ dev_dbg(&pdev->dev, "cannot create workqueue for OTG\n");
+ return -ENOMEM;
+ }
+
+ INIT_DELAYED_WORK(&mvotg->work, mv_otg_work);
+
+ /* OTG common part */
+ mvotg->pdev = pdev;
+ mvotg->phy.dev = &pdev->dev;
+ mvotg->phy.otg = otg;
+ mvotg->phy.label = driver_name;
+ mvotg->phy.state = OTG_STATE_UNDEFINED;
+
+ otg->phy = &mvotg->phy;
+ otg->set_host = mv_otg_set_host;
+ otg->set_peripheral = mv_otg_set_peripheral;
+ otg->set_vbus = mv_otg_set_vbus;
+
+ for (i = 0; i < OTG_TIMER_NUM; i++)
+ init_timer(&mvotg->otg_ctrl.timer[i]);
+
+ r = platform_get_resource_byname(mvotg->pdev,
+ IORESOURCE_MEM, "phyregs");
+ if (r == NULL) {
+ dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
+ retval = -ENODEV;
+ goto err_destroy_workqueue;
+ }
+
+ mvotg->phy_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
+ if (mvotg->phy_regs == NULL) {
+ dev_err(&pdev->dev, "failed to map phy I/O memory\n");
+ retval = -EFAULT;
+ goto err_destroy_workqueue;
+ }
+
+ r = platform_get_resource_byname(mvotg->pdev,
+ IORESOURCE_MEM, "capregs");
+ if (r == NULL) {
+ dev_err(&pdev->dev, "no I/O memory resource defined\n");
+ retval = -ENODEV;
+ goto err_destroy_workqueue;
+ }
+
+ mvotg->cap_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
+ if (mvotg->cap_regs == NULL) {
+ dev_err(&pdev->dev, "failed to map I/O memory\n");
+ retval = -EFAULT;
+ goto err_destroy_workqueue;
+ }
+
+ /* we will acces controller register, so enable the udc controller */
+ retval = mv_otg_enable_internal(mvotg);
+ if (retval) {
+ dev_err(&pdev->dev, "mv otg enable error %d\n", retval);
+ goto err_destroy_workqueue;
+ }
+
+ mvotg->op_regs =
+ (struct mv_otg_regs __iomem *) ((unsigned long) mvotg->cap_regs
+ + (readl(mvotg->cap_regs) & CAPLENGTH_MASK));
+
+ if (pdata->id) {
+ retval = devm_request_threaded_irq(&pdev->dev, pdata->id->irq,
+ NULL, mv_otg_inputs_irq,
+ IRQF_ONESHOT, "id", mvotg);
+ if (retval) {
+ dev_info(&pdev->dev,
+ "Failed to request irq for ID\n");
+ pdata->id = NULL;
+ }
+ }
+
+ if (pdata->vbus) {
+ mvotg->clock_gating = 1;
+ retval = devm_request_threaded_irq(&pdev->dev, pdata->vbus->irq,
+ NULL, mv_otg_inputs_irq,
+ IRQF_ONESHOT, "vbus", mvotg);
+ if (retval) {
+ dev_info(&pdev->dev,
+ "Failed to request irq for VBUS, "
+ "disable clock gating\n");
+ mvotg->clock_gating = 0;
+ pdata->vbus = NULL;
+ }
+ }
+
+ if (pdata->disable_otg_clock_gating)
+ mvotg->clock_gating = 0;
+
+ mv_otg_reset(mvotg);
+ mv_otg_init_irq(mvotg);
+
+ r = platform_get_resource(mvotg->pdev, IORESOURCE_IRQ, 0);
+ if (r == NULL) {
+ dev_err(&pdev->dev, "no IRQ resource defined\n");
+ retval = -ENODEV;
+ goto err_disable_clk;
+ }
+
+ mvotg->irq = r->start;
+ if (devm_request_irq(&pdev->dev, mvotg->irq, mv_otg_irq, IRQF_SHARED,
+ driver_name, mvotg)) {
+ dev_err(&pdev->dev, "Request irq %d for OTG failed\n",
+ mvotg->irq);
+ mvotg->irq = 0;
+ retval = -ENODEV;
+ goto err_disable_clk;
+ }
+
+ retval = usb_add_phy(&mvotg->phy, USB_PHY_TYPE_USB2);
+ if (retval < 0) {
+ dev_err(&pdev->dev, "can't register transceiver, %d\n",
+ retval);
+ goto err_disable_clk;
+ }
+
+ retval = sysfs_create_group(&pdev->dev.kobj, &inputs_attr_group);
+ if (retval < 0) {
+ dev_dbg(&pdev->dev,
+ "Can't register sysfs attr group: %d\n", retval);
+ goto err_remove_phy;
+ }
+
+ spin_lock_init(&mvotg->wq_lock);
+ if (spin_trylock(&mvotg->wq_lock)) {
+ mv_otg_run_state_machine(mvotg, 2 * HZ);
+ spin_unlock(&mvotg->wq_lock);
+ }
+
+ dev_info(&pdev->dev,
+ "successful probe OTG device %s clock gating.\n",
+ mvotg->clock_gating ? "with" : "without");
+
+ return 0;
+
+err_remove_phy:
+ usb_remove_phy(&mvotg->phy);
+err_disable_clk:
+ mv_otg_disable_internal(mvotg);
+err_destroy_workqueue:
+ flush_workqueue(mvotg->qwork);
+ destroy_workqueue(mvotg->qwork);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return retval;
+}
+
+#ifdef CONFIG_PM
+static int mv_otg_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mv_otg *mvotg = platform_get_drvdata(pdev);
+
+ if (mvotg->phy.state != OTG_STATE_B_IDLE) {
+ dev_info(&pdev->dev,
+ "OTG state is not B_IDLE, it is %d!\n",
+ mvotg->phy.state);
+ return -EAGAIN;
+ }
+
+ if (!mvotg->clock_gating)
+ mv_otg_disable_internal(mvotg);
+
+ return 0;
+}
+
+static int mv_otg_resume(struct platform_device *pdev)
+{
+ struct mv_otg *mvotg = platform_get_drvdata(pdev);
+ u32 otgsc;
+
+ if (!mvotg->clock_gating) {
+ mv_otg_enable_internal(mvotg);
+
+ otgsc = readl(&mvotg->op_regs->otgsc);
+ otgsc |= mvotg->irq_en;
+ writel(otgsc, &mvotg->op_regs->otgsc);
+
+ if (spin_trylock(&mvotg->wq_lock)) {
+ mv_otg_run_state_machine(mvotg, 0);
+ spin_unlock(&mvotg->wq_lock);
+ }
+ }
+ return 0;
+}
+#endif
+
+static struct platform_driver mv_otg_driver = {
+ .probe = mv_otg_probe,
+ .remove = __exit_p(mv_otg_remove),
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = driver_name,
+ },
+#ifdef CONFIG_PM
+ .suspend = mv_otg_suspend,
+ .resume = mv_otg_resume,
+#endif
+};
+module_platform_driver(mv_otg_driver);
--- /dev/null
+/*
+ * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __MV_USB_OTG_CONTROLLER__
+#define __MV_USB_OTG_CONTROLLER__
+
+#include <linux/types.h>
+
+/* Command Register Bit Masks */
+#define USBCMD_RUN_STOP (0x00000001)
+#define USBCMD_CTRL_RESET (0x00000002)
+
+/* otgsc Register Bit Masks */
+#define OTGSC_CTRL_VUSB_DISCHARGE 0x00000001
+#define OTGSC_CTRL_VUSB_CHARGE 0x00000002
+#define OTGSC_CTRL_OTG_TERM 0x00000008
+#define OTGSC_CTRL_DATA_PULSING 0x00000010
+#define OTGSC_STS_USB_ID 0x00000100
+#define OTGSC_STS_A_VBUS_VALID 0x00000200
+#define OTGSC_STS_A_SESSION_VALID 0x00000400
+#define OTGSC_STS_B_SESSION_VALID 0x00000800
+#define OTGSC_STS_B_SESSION_END 0x00001000
+#define OTGSC_STS_1MS_TOGGLE 0x00002000
+#define OTGSC_STS_DATA_PULSING 0x00004000
+#define OTGSC_INTSTS_USB_ID 0x00010000
+#define OTGSC_INTSTS_A_VBUS_VALID 0x00020000
+#define OTGSC_INTSTS_A_SESSION_VALID 0x00040000
+#define OTGSC_INTSTS_B_SESSION_VALID 0x00080000
+#define OTGSC_INTSTS_B_SESSION_END 0x00100000
+#define OTGSC_INTSTS_1MS 0x00200000
+#define OTGSC_INTSTS_DATA_PULSING 0x00400000
+#define OTGSC_INTR_USB_ID 0x01000000
+#define OTGSC_INTR_A_VBUS_VALID 0x02000000
+#define OTGSC_INTR_A_SESSION_VALID 0x04000000
+#define OTGSC_INTR_B_SESSION_VALID 0x08000000
+#define OTGSC_INTR_B_SESSION_END 0x10000000
+#define OTGSC_INTR_1MS_TIMER 0x20000000
+#define OTGSC_INTR_DATA_PULSING 0x40000000
+
+#define CAPLENGTH_MASK (0xff)
+
+/* Timer's interval, unit 10ms */
+#define T_A_WAIT_VRISE 100
+#define T_A_WAIT_BCON 2000
+#define T_A_AIDL_BDIS 100
+#define T_A_BIDL_ADIS 20
+#define T_B_ASE0_BRST 400
+#define T_B_SE0_SRP 300
+#define T_B_SRP_FAIL 2000
+#define T_B_DATA_PLS 10
+#define T_B_SRP_INIT 100
+#define T_A_SRP_RSPNS 10
+#define T_A_DRV_RSM 5
+
+enum otg_function {
+ OTG_B_DEVICE = 0,
+ OTG_A_DEVICE
+};
+
+enum mv_otg_timer {
+ A_WAIT_BCON_TIMER = 0,
+ OTG_TIMER_NUM
+};
+
+/* PXA OTG state machine */
+struct mv_otg_ctrl {
+ /* internal variables */
+ u8 a_set_b_hnp_en; /* A-Device set b_hnp_en */
+ u8 b_srp_done;
+ u8 b_hnp_en;
+
+ /* OTG inputs */
+ u8 a_bus_drop;
+ u8 a_bus_req;
+ u8 a_clr_err;
+ u8 a_bus_resume;
+ u8 a_bus_suspend;
+ u8 a_conn;
+ u8 a_sess_vld;
+ u8 a_srp_det;
+ u8 a_vbus_vld;
+ u8 b_bus_req; /* B-Device Require Bus */
+ u8 b_bus_resume;
+ u8 b_bus_suspend;
+ u8 b_conn;
+ u8 b_se0_srp;
+ u8 b_sess_end;
+ u8 b_sess_vld;
+ u8 id;
+ u8 a_suspend_req;
+
+ /*Timer event */
+ u8 a_aidl_bdis_timeout;
+ u8 b_ase0_brst_timeout;
+ u8 a_bidl_adis_timeout;
+ u8 a_wait_bcon_timeout;
+
+ struct timer_list timer[OTG_TIMER_NUM];
+};
+
+#define VUSBHS_MAX_PORTS 8
+
+struct mv_otg_regs {
+ u32 usbcmd; /* Command register */
+ u32 usbsts; /* Status register */
+ u32 usbintr; /* Interrupt enable */
+ u32 frindex; /* Frame index */
+ u32 reserved1[1];
+ u32 deviceaddr; /* Device Address */
+ u32 eplistaddr; /* Endpoint List Address */
+ u32 ttctrl; /* HOST TT status and control */
+ u32 burstsize; /* Programmable Burst Size */
+ u32 txfilltuning; /* Host Transmit Pre-Buffer Packet Tuning */
+ u32 reserved[4];
+ u32 epnak; /* Endpoint NAK */
+ u32 epnaken; /* Endpoint NAK Enable */
+ u32 configflag; /* Configured Flag register */
+ u32 portsc[VUSBHS_MAX_PORTS]; /* Port Status/Control x, x = 1..8 */
+ u32 otgsc;
+ u32 usbmode; /* USB Host/Device mode */
+ u32 epsetupstat; /* Endpoint Setup Status */
+ u32 epprime; /* Endpoint Initialize */
+ u32 epflush; /* Endpoint De-initialize */
+ u32 epstatus; /* Endpoint Status */
+ u32 epcomplete; /* Endpoint Interrupt On Complete */
+ u32 epctrlx[16]; /* Endpoint Control, where x = 0.. 15 */
+ u32 mcr; /* Mux Control */
+ u32 isr; /* Interrupt Status */
+ u32 ier; /* Interrupt Enable */
+};
+
+struct mv_otg {
+ struct usb_phy phy;
+ struct mv_otg_ctrl otg_ctrl;
+
+ /* base address */
+ void __iomem *phy_regs;
+ void __iomem *cap_regs;
+ struct mv_otg_regs __iomem *op_regs;
+
+ struct platform_device *pdev;
+ int irq;
+ u32 irq_status;
+ u32 irq_en;
+
+ struct delayed_work work;
+ struct workqueue_struct *qwork;
+
+ spinlock_t wq_lock;
+
+ struct mv_usb_platform_data *pdata;
+
+ unsigned int active;
+ unsigned int clock_gating;
+ unsigned int clknum;
+ struct clk *clk[0];
+};
+
+#endif
--- /dev/null
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012 Marek Vasut <marex@denx.de>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/usb/otg.h>
+#include <linux/stmp_device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#define DRIVER_NAME "mxs_phy"
+
+#define HW_USBPHY_PWD 0x00
+#define HW_USBPHY_CTRL 0x30
+#define HW_USBPHY_CTRL_SET 0x34
+#define HW_USBPHY_CTRL_CLR 0x38
+
+#define BM_USBPHY_CTRL_SFTRST BIT(31)
+#define BM_USBPHY_CTRL_CLKGATE BIT(30)
+#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15)
+#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
+#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
+
+struct mxs_phy {
+ struct usb_phy phy;
+ struct clk *clk;
+};
+
+#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
+
+static void mxs_phy_hw_init(struct mxs_phy *mxs_phy)
+{
+ void __iomem *base = mxs_phy->phy.io_priv;
+
+ stmp_reset_block(base + HW_USBPHY_CTRL);
+
+ /* Power up the PHY */
+ writel(0, base + HW_USBPHY_PWD);
+
+ /* enable FS/LS device */
+ writel(BM_USBPHY_CTRL_ENUTMILEVEL2 |
+ BM_USBPHY_CTRL_ENUTMILEVEL3,
+ base + HW_USBPHY_CTRL_SET);
+}
+
+static int mxs_phy_init(struct usb_phy *phy)
+{
+ struct mxs_phy *mxs_phy = to_mxs_phy(phy);
+
+ clk_prepare_enable(mxs_phy->clk);
+ mxs_phy_hw_init(mxs_phy);
+
+ return 0;
+}
+
+static void mxs_phy_shutdown(struct usb_phy *phy)
+{
+ struct mxs_phy *mxs_phy = to_mxs_phy(phy);
+
+ writel(BM_USBPHY_CTRL_CLKGATE,
+ phy->io_priv + HW_USBPHY_CTRL_SET);
+
+ clk_disable_unprepare(mxs_phy->clk);
+}
+
+static int mxs_phy_suspend(struct usb_phy *x, int suspend)
+{
+ struct mxs_phy *mxs_phy = to_mxs_phy(x);
+
+ if (suspend) {
+ writel(0xffffffff, x->io_priv + HW_USBPHY_PWD);
+ writel(BM_USBPHY_CTRL_CLKGATE,
+ x->io_priv + HW_USBPHY_CTRL_SET);
+ clk_disable_unprepare(mxs_phy->clk);
+ } else {
+ clk_prepare_enable(mxs_phy->clk);
+ writel(BM_USBPHY_CTRL_CLKGATE,
+ x->io_priv + HW_USBPHY_CTRL_CLR);
+ writel(0, x->io_priv + HW_USBPHY_PWD);
+ }
+
+ return 0;
+}
+
+static int mxs_phy_on_connect(struct usb_phy *phy,
+ enum usb_device_speed speed)
+{
+ dev_dbg(phy->dev, "%s speed device has connected\n",
+ (speed == USB_SPEED_HIGH) ? "high" : "non-high");
+
+ if (speed == USB_SPEED_HIGH)
+ writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
+ phy->io_priv + HW_USBPHY_CTRL_SET);
+
+ return 0;
+}
+
+static int mxs_phy_on_disconnect(struct usb_phy *phy,
+ enum usb_device_speed speed)
+{
+ dev_dbg(phy->dev, "%s speed device has disconnected\n",
+ (speed == USB_SPEED_HIGH) ? "high" : "non-high");
+
+ if (speed == USB_SPEED_HIGH)
+ writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
+ phy->io_priv + HW_USBPHY_CTRL_CLR);
+
+ return 0;
+}
+
+static int mxs_phy_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ void __iomem *base;
+ struct clk *clk;
+ struct mxs_phy *mxs_phy;
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "can't get device resources\n");
+ return -ENOENT;
+ }
+
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev,
+ "can't get the clock, err=%ld", PTR_ERR(clk));
+ return PTR_ERR(clk);
+ }
+
+ mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL);
+ if (!mxs_phy) {
+ dev_err(&pdev->dev, "Failed to allocate USB PHY structure!\n");
+ return -ENOMEM;
+ }
+
+ mxs_phy->phy.io_priv = base;
+ mxs_phy->phy.dev = &pdev->dev;
+ mxs_phy->phy.label = DRIVER_NAME;
+ mxs_phy->phy.init = mxs_phy_init;
+ mxs_phy->phy.shutdown = mxs_phy_shutdown;
+ mxs_phy->phy.set_suspend = mxs_phy_suspend;
+ mxs_phy->phy.notify_connect = mxs_phy_on_connect;
+ mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect;
+
+ ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier);
+
+ mxs_phy->clk = clk;
+
+ platform_set_drvdata(pdev, &mxs_phy->phy);
+
+ ret = usb_add_phy_dev(&mxs_phy->phy);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int mxs_phy_remove(struct platform_device *pdev)
+{
+ struct mxs_phy *mxs_phy = platform_get_drvdata(pdev);
+
+ usb_remove_phy(&mxs_phy->phy);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id mxs_phy_dt_ids[] = {
+ { .compatible = "fsl,imx23-usbphy", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
+
+static struct platform_driver mxs_phy_driver = {
+ .probe = mxs_phy_probe,
+ .remove = mxs_phy_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = mxs_phy_dt_ids,
+ },
+};
+
+static int __init mxs_phy_module_init(void)
+{
+ return platform_driver_register(&mxs_phy_driver);
+}
+postcore_initcall(mxs_phy_module_init);
+
+static void __exit mxs_phy_module_exit(void)
+{
+ platform_driver_unregister(&mxs_phy_driver);
+}
+module_exit(mxs_phy_module_exit);
+
+MODULE_ALIAS("platform:mxs-usb-phy");
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
+MODULE_DESCRIPTION("Freescale MXS USB PHY driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * drivers/usb/otg/nop-usb-xceiv.c
+ *
+ * NOP USB transceiver for all USB transceiver which are either built-in
+ * into USB IP or which are mostly autonomous.
+ *
+ * Copyright (C) 2009 Texas Instruments Inc
+ * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Current status:
+ * This provides a "nop" transceiver for PHYs which are
+ * autonomous such as isp1504, isp1707, etc.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/nop-usb-xceiv.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+#include <linux/of.h>
+
+struct nop_usb_xceiv {
+ struct usb_phy phy;
+ struct device *dev;
+ struct clk *clk;
+ struct regulator *vcc;
+ struct regulator *reset;
+};
+
+static struct platform_device *pd;
+
+void usb_nop_xceiv_register(void)
+{
+ if (pd)
+ return;
+ pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
+ if (!pd) {
+ printk(KERN_ERR "Unable to register usb nop transceiver\n");
+ return;
+ }
+}
+EXPORT_SYMBOL(usb_nop_xceiv_register);
+
+void usb_nop_xceiv_unregister(void)
+{
+ platform_device_unregister(pd);
+ pd = NULL;
+}
+EXPORT_SYMBOL(usb_nop_xceiv_unregister);
+
+static int nop_set_suspend(struct usb_phy *x, int suspend)
+{
+ return 0;
+}
+
+static int nop_init(struct usb_phy *phy)
+{
+ struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
+
+ if (!IS_ERR(nop->vcc)) {
+ if (regulator_enable(nop->vcc))
+ dev_err(phy->dev, "Failed to enable power\n");
+ }
+
+ if (!IS_ERR(nop->clk))
+ clk_enable(nop->clk);
+
+ if (!IS_ERR(nop->reset)) {
+ /* De-assert RESET */
+ if (regulator_enable(nop->reset))
+ dev_err(phy->dev, "Failed to de-assert reset\n");
+ }
+
+ return 0;
+}
+
+static void nop_shutdown(struct usb_phy *phy)
+{
+ struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
+
+ if (!IS_ERR(nop->reset)) {
+ /* Assert RESET */
+ if (regulator_disable(nop->reset))
+ dev_err(phy->dev, "Failed to assert reset\n");
+ }
+
+ if (!IS_ERR(nop->clk))
+ clk_disable(nop->clk);
+
+ if (!IS_ERR(nop->vcc)) {
+ if (regulator_disable(nop->vcc))
+ dev_err(phy->dev, "Failed to disable power\n");
+ }
+}
+
+static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
+{
+ if (!otg)
+ return -ENODEV;
+
+ if (!gadget) {
+ otg->gadget = NULL;
+ return -ENODEV;
+ }
+
+ otg->gadget = gadget;
+ otg->phy->state = OTG_STATE_B_IDLE;
+ return 0;
+}
+
+static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ if (!otg)
+ return -ENODEV;
+
+ if (!host) {
+ otg->host = NULL;
+ return -ENODEV;
+ }
+
+ otg->host = host;
+ return 0;
+}
+
+static int nop_usb_xceiv_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct nop_usb_xceiv_platform_data *pdata = pdev->dev.platform_data;
+ struct nop_usb_xceiv *nop;
+ enum usb_phy_type type = USB_PHY_TYPE_USB2;
+ int err;
+ u32 clk_rate = 0;
+ bool needs_vcc = false;
+ bool needs_reset = false;
+
+ nop = devm_kzalloc(&pdev->dev, sizeof(*nop), GFP_KERNEL);
+ if (!nop)
+ return -ENOMEM;
+
+ nop->phy.otg = devm_kzalloc(&pdev->dev, sizeof(*nop->phy.otg),
+ GFP_KERNEL);
+ if (!nop->phy.otg)
+ return -ENOMEM;
+
+ if (dev->of_node) {
+ struct device_node *node = dev->of_node;
+
+ if (of_property_read_u32(node, "clock-frequency", &clk_rate))
+ clk_rate = 0;
+
+ needs_vcc = of_property_read_bool(node, "vcc-supply");
+ needs_reset = of_property_read_bool(node, "reset-supply");
+
+ } else if (pdata) {
+ type = pdata->type;
+ clk_rate = pdata->clk_rate;
+ needs_vcc = pdata->needs_vcc;
+ needs_reset = pdata->needs_reset;
+ }
+
+ nop->clk = devm_clk_get(&pdev->dev, "main_clk");
+ if (IS_ERR(nop->clk)) {
+ dev_dbg(&pdev->dev, "Can't get phy clock: %ld\n",
+ PTR_ERR(nop->clk));
+ }
+
+ if (!IS_ERR(nop->clk) && clk_rate) {
+ err = clk_set_rate(nop->clk, clk_rate);
+ if (err) {
+ dev_err(&pdev->dev, "Error setting clock rate\n");
+ return err;
+ }
+ }
+
+ if (!IS_ERR(nop->clk)) {
+ err = clk_prepare(nop->clk);
+ if (err) {
+ dev_err(&pdev->dev, "Error preparing clock\n");
+ return err;
+ }
+ }
+
+ nop->vcc = devm_regulator_get(&pdev->dev, "vcc");
+ if (IS_ERR(nop->vcc)) {
+ dev_dbg(&pdev->dev, "Error getting vcc regulator: %ld\n",
+ PTR_ERR(nop->vcc));
+ if (needs_vcc)
+ return -EPROBE_DEFER;
+ }
+
+ nop->reset = devm_regulator_get(&pdev->dev, "reset");
+ if (IS_ERR(nop->reset)) {
+ dev_dbg(&pdev->dev, "Error getting reset regulator: %ld\n",
+ PTR_ERR(nop->reset));
+ if (needs_reset)
+ return -EPROBE_DEFER;
+ }
+
+ nop->dev = &pdev->dev;
+ nop->phy.dev = nop->dev;
+ nop->phy.label = "nop-xceiv";
+ nop->phy.set_suspend = nop_set_suspend;
+ nop->phy.init = nop_init;
+ nop->phy.shutdown = nop_shutdown;
+ nop->phy.state = OTG_STATE_UNDEFINED;
+ nop->phy.type = type;
+
+ nop->phy.otg->phy = &nop->phy;
+ nop->phy.otg->set_host = nop_set_host;
+ nop->phy.otg->set_peripheral = nop_set_peripheral;
+
+ err = usb_add_phy_dev(&nop->phy);
+ if (err) {
+ dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
+ err);
+ goto err_add;
+ }
+
+ platform_set_drvdata(pdev, nop);
+
+ ATOMIC_INIT_NOTIFIER_HEAD(&nop->phy.notifier);
+
+ return 0;
+
+err_add:
+ if (!IS_ERR(nop->clk))
+ clk_unprepare(nop->clk);
+ return err;
+}
+
+static int nop_usb_xceiv_remove(struct platform_device *pdev)
+{
+ struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
+
+ if (!IS_ERR(nop->clk))
+ clk_unprepare(nop->clk);
+
+ usb_remove_phy(&nop->phy);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id nop_xceiv_dt_ids[] = {
+ { .compatible = "usb-nop-xceiv" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids);
+
+static struct platform_driver nop_usb_xceiv_driver = {
+ .probe = nop_usb_xceiv_probe,
+ .remove = nop_usb_xceiv_remove,
+ .driver = {
+ .name = "nop_usb_xceiv",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(nop_xceiv_dt_ids),
+ },
+};
+
+static int __init nop_usb_xceiv_init(void)
+{
+ return platform_driver_register(&nop_usb_xceiv_driver);
+}
+subsys_initcall(nop_usb_xceiv_init);
+
+static void __exit nop_usb_xceiv_exit(void)
+{
+ platform_driver_unregister(&nop_usb_xceiv_driver);
+}
+module_exit(nop_usb_xceiv_exit);
+
+MODULE_ALIAS("platform:nop_usb_xceiv");
+MODULE_AUTHOR("Texas Instruments Inc");
+MODULE_DESCRIPTION("NOP USB Transceiver driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * OTG Finite State Machine from OTG spec
+ *
+ * Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * Author: Li Yang <LeoLi@freescale.com>
+ * Jerry Huang <Chang-Ming.Huang@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/usb.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+
+#include "otg_fsm.h"
+
+/* Change USB protocol when there is a protocol change */
+static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
+{
+ int ret = 0;
+
+ if (fsm->protocol != protocol) {
+ VDBG("Changing role fsm->protocol= %d; new protocol= %d\n",
+ fsm->protocol, protocol);
+ /* stop old protocol */
+ if (fsm->protocol == PROTO_HOST)
+ ret = fsm->ops->start_host(fsm, 0);
+ else if (fsm->protocol == PROTO_GADGET)
+ ret = fsm->ops->start_gadget(fsm, 0);
+ if (ret)
+ return ret;
+
+ /* start new protocol */
+ if (protocol == PROTO_HOST)
+ ret = fsm->ops->start_host(fsm, 1);
+ else if (protocol == PROTO_GADGET)
+ ret = fsm->ops->start_gadget(fsm, 1);
+ if (ret)
+ return ret;
+
+ fsm->protocol = protocol;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int state_changed;
+
+/* Called when leaving a state. Do state clean up jobs here */
+void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
+{
+ switch (old_state) {
+ case OTG_STATE_B_IDLE:
+ otg_del_timer(fsm, b_se0_srp_tmr);
+ fsm->b_se0_srp = 0;
+ break;
+ case OTG_STATE_B_SRP_INIT:
+ fsm->b_srp_done = 0;
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ otg_del_timer(fsm, b_ase0_brst_tmr);
+ fsm->b_ase0_brst_tmout = 0;
+ break;
+ case OTG_STATE_B_HOST:
+ break;
+ case OTG_STATE_A_IDLE:
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ otg_del_timer(fsm, a_wait_vrise_tmr);
+ fsm->a_wait_vrise_tmout = 0;
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ otg_del_timer(fsm, a_wait_bcon_tmr);
+ fsm->a_wait_bcon_tmout = 0;
+ break;
+ case OTG_STATE_A_HOST:
+ otg_del_timer(fsm, a_wait_enum_tmr);
+ break;
+ case OTG_STATE_A_SUSPEND:
+ otg_del_timer(fsm, a_aidl_bdis_tmr);
+ fsm->a_aidl_bdis_tmout = 0;
+ fsm->a_suspend_req = 0;
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ otg_del_timer(fsm, a_wait_vrise_tmr);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ break;
+ default:
+ break;
+ }
+}
+
+/* Called when entering a state */
+int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
+{
+ state_changed = 1;
+ if (fsm->otg->phy->state == new_state)
+ return 0;
+ VDBG("Set state: %s\n", usb_otg_state_string(new_state));
+ otg_leave_state(fsm, fsm->otg->phy->state);
+ switch (new_state) {
+ case OTG_STATE_B_IDLE:
+ otg_drv_vbus(fsm, 0);
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_UNDEF);
+ otg_add_timer(fsm, b_se0_srp_tmr);
+ break;
+ case OTG_STATE_B_SRP_INIT:
+ otg_start_pulse(fsm);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_UNDEF);
+ otg_add_timer(fsm, b_srp_fail_tmr);
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 1);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_GADGET);
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, b_ase0_brst_tmr);
+ fsm->a_bus_suspend = 0;
+ break;
+ case OTG_STATE_B_HOST:
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 1);
+ otg_set_protocol(fsm, PROTO_HOST);
+ usb_bus_start_enum(fsm->otg->host,
+ fsm->otg->host->otg_port);
+ break;
+ case OTG_STATE_A_IDLE:
+ otg_drv_vbus(fsm, 0);
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, a_wait_vrise_tmr);
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, a_wait_bcon_tmr);
+ break;
+ case OTG_STATE_A_HOST:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 1);
+ otg_set_protocol(fsm, PROTO_HOST);
+ /*
+ * When HNP is triggered while a_bus_req = 0, a_host will
+ * suspend too fast to complete a_set_b_hnp_en
+ */
+ if (!fsm->a_bus_req || fsm->a_suspend_req)
+ otg_add_timer(fsm, a_wait_enum_tmr);
+ break;
+ case OTG_STATE_A_SUSPEND:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, a_aidl_bdis_tmr);
+
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ otg_loc_conn(fsm, 1);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_GADGET);
+ otg_drv_vbus(fsm, 1);
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ otg_drv_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ otg_drv_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_UNDEF);
+ break;
+ default:
+ break;
+ }
+
+ fsm->otg->phy->state = new_state;
+ return 0;
+}
+
+/* State change judgement */
+int otg_statemachine(struct otg_fsm *fsm)
+{
+ enum usb_otg_state state;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fsm->lock, flags);
+
+ state = fsm->otg->phy->state;
+ state_changed = 0;
+ /* State machine state change judgement */
+
+ switch (state) {
+ case OTG_STATE_UNDEFINED:
+ VDBG("fsm->id = %d\n", fsm->id);
+ if (fsm->id)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else
+ otg_set_state(fsm, OTG_STATE_A_IDLE);
+ break;
+ case OTG_STATE_B_IDLE:
+ if (!fsm->id)
+ otg_set_state(fsm, OTG_STATE_A_IDLE);
+ else if (fsm->b_sess_vld && fsm->otg->gadget)
+ otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+ else if (fsm->b_bus_req && fsm->b_sess_end && fsm->b_se0_srp)
+ otg_set_state(fsm, OTG_STATE_B_SRP_INIT);
+ break;
+ case OTG_STATE_B_SRP_INIT:
+ if (!fsm->id || fsm->b_srp_done)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ if (!fsm->id || !fsm->b_sess_vld)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (fsm->b_bus_req && fsm->otg->
+ gadget->b_hnp_enable && fsm->a_bus_suspend)
+ otg_set_state(fsm, OTG_STATE_B_WAIT_ACON);
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ if (fsm->a_conn)
+ otg_set_state(fsm, OTG_STATE_B_HOST);
+ else if (!fsm->id || !fsm->b_sess_vld)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) {
+ fsm->b_ase0_brst_tmout = 0;
+ otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+ }
+ break;
+ case OTG_STATE_B_HOST:
+ if (!fsm->id || !fsm->b_sess_vld)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (!fsm->b_bus_req || !fsm->a_conn)
+ otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+ break;
+ case OTG_STATE_A_IDLE:
+ if (fsm->id)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (!fsm->a_bus_drop && (fsm->a_bus_req || fsm->a_srp_det))
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE);
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ if (fsm->id || fsm->a_bus_drop || fsm->a_vbus_vld ||
+ fsm->a_wait_vrise_tmout) {
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ }
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ else if (fsm->b_conn)
+ otg_set_state(fsm, OTG_STATE_A_HOST);
+ else if (fsm->id | fsm->a_bus_drop | fsm->a_wait_bcon_tmout)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ break;
+ case OTG_STATE_A_HOST:
+ if ((!fsm->a_bus_req || fsm->a_suspend_req) &&
+ fsm->otg->host->b_hnp_enable)
+ otg_set_state(fsm, OTG_STATE_A_SUSPEND);
+ else if (fsm->id || !fsm->b_conn || fsm->a_bus_drop)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ else if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ break;
+ case OTG_STATE_A_SUSPEND:
+ if (!fsm->b_conn && fsm->otg->host->b_hnp_enable)
+ otg_set_state(fsm, OTG_STATE_A_PERIPHERAL);
+ else if (!fsm->b_conn && !fsm->otg->host->b_hnp_enable)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ else if (fsm->a_bus_req || fsm->b_bus_resume)
+ otg_set_state(fsm, OTG_STATE_A_HOST);
+ else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ else if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ if (fsm->id || fsm->a_bus_drop)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ else if (fsm->b_bus_suspend)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ else if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ if (fsm->id || fsm->a_bus_req || (!fsm->a_sess_vld &&
+ !fsm->b_conn))
+ otg_set_state(fsm, OTG_STATE_A_IDLE);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ break;
+ default:
+ break;
+ }
+ spin_unlock_irqrestore(&fsm->lock, flags);
+
+ VDBG("quit statemachine, changed = %d\n", state_changed);
+ return state_changed;
+}
--- /dev/null
+/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#undef DEBUG
+#undef VERBOSE
+
+#ifdef DEBUG
+#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \
+ __func__, ## args)
+#else
+#define DBG(fmt, args...) do {} while (0)
+#endif
+
+#ifdef VERBOSE
+#define VDBG DBG
+#else
+#define VDBG(stuff...) do {} while (0)
+#endif
+
+#ifdef VERBOSE
+#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
+#else
+#define MPC_LOC do {} while (0)
+#endif
+
+#define PROTO_UNDEF (0)
+#define PROTO_HOST (1)
+#define PROTO_GADGET (2)
+
+/* OTG state machine according to the OTG spec */
+struct otg_fsm {
+ /* Input */
+ int a_bus_resume;
+ int a_bus_suspend;
+ int a_conn;
+ int a_sess_vld;
+ int a_srp_det;
+ int a_vbus_vld;
+ int b_bus_resume;
+ int b_bus_suspend;
+ int b_conn;
+ int b_se0_srp;
+ int b_sess_end;
+ int b_sess_vld;
+ int id;
+
+ /* Internal variables */
+ int a_set_b_hnp_en;
+ int b_srp_done;
+ int b_hnp_enable;
+
+ /* Timeout indicator for timers */
+ int a_wait_vrise_tmout;
+ int a_wait_bcon_tmout;
+ int a_aidl_bdis_tmout;
+ int b_ase0_brst_tmout;
+
+ /* Informative variables */
+ int a_bus_drop;
+ int a_bus_req;
+ int a_clr_err;
+ int a_suspend_req;
+ int b_bus_req;
+
+ /* Output */
+ int drv_vbus;
+ int loc_conn;
+ int loc_sof;
+
+ struct otg_fsm_ops *ops;
+ struct usb_otg *otg;
+
+ /* Current usb protocol used: 0:undefine; 1:host; 2:client */
+ int protocol;
+ spinlock_t lock;
+};
+
+struct otg_fsm_ops {
+ void (*chrg_vbus)(int on);
+ void (*drv_vbus)(int on);
+ void (*loc_conn)(int on);
+ void (*loc_sof)(int on);
+ void (*start_pulse)(void);
+ void (*add_timer)(void *timer);
+ void (*del_timer)(void *timer);
+ int (*start_host)(struct otg_fsm *fsm, int on);
+ int (*start_gadget)(struct otg_fsm *fsm, int on);
+};
+
+
+static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
+{
+ fsm->ops->chrg_vbus(on);
+}
+
+static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
+{
+ if (fsm->drv_vbus != on) {
+ fsm->drv_vbus = on;
+ fsm->ops->drv_vbus(on);
+ }
+}
+
+static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
+{
+ if (fsm->loc_conn != on) {
+ fsm->loc_conn = on;
+ fsm->ops->loc_conn(on);
+ }
+}
+
+static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
+{
+ if (fsm->loc_sof != on) {
+ fsm->loc_sof = on;
+ fsm->ops->loc_sof(on);
+ }
+}
+
+static inline void otg_start_pulse(struct otg_fsm *fsm)
+{
+ fsm->ops->start_pulse();
+}
+
+static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
+{
+ fsm->ops->add_timer(timer);
+}
+
+static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
+{
+ fsm->ops->del_timer(timer);
+}
+
+int otg_statemachine(struct otg_fsm *fsm);
+
+/* Defined by device specific driver, for different timer implementation */
+extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
+ *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr,
+ *a_wait_enum_tmr;
--- /dev/null
+/*
+ * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller
+ *
+ * Copyright (C) 2004-2007 Texas Instruments
+ * Copyright (C) 2008 Nokia Corporation
+ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Current status:
+ * - HS USB ULPI mode works.
+ * - 3-pin mode support may be added in future.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/musb-omap.h>
+#include <linux/usb/ulpi.h>
+#include <linux/i2c/twl.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+/* Register defines */
+
+#define MCPC_CTRL 0x30
+#define MCPC_CTRL_RTSOL (1 << 7)
+#define MCPC_CTRL_EXTSWR (1 << 6)
+#define MCPC_CTRL_EXTSWC (1 << 5)
+#define MCPC_CTRL_VOICESW (1 << 4)
+#define MCPC_CTRL_OUT64K (1 << 3)
+#define MCPC_CTRL_RTSCTSSW (1 << 2)
+#define MCPC_CTRL_HS_UART (1 << 0)
+
+#define MCPC_IO_CTRL 0x33
+#define MCPC_IO_CTRL_MICBIASEN (1 << 5)
+#define MCPC_IO_CTRL_CTS_NPU (1 << 4)
+#define MCPC_IO_CTRL_RXD_PU (1 << 3)
+#define MCPC_IO_CTRL_TXDTYP (1 << 2)
+#define MCPC_IO_CTRL_CTSTYP (1 << 1)
+#define MCPC_IO_CTRL_RTSTYP (1 << 0)
+
+#define MCPC_CTRL2 0x36
+#define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
+
+#define OTHER_FUNC_CTRL 0x80
+#define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
+#define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
+
+#define OTHER_IFC_CTRL 0x83
+#define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
+#define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
+#define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
+#define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
+#define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
+#define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
+
+#define OTHER_INT_EN_RISE 0x86
+#define OTHER_INT_EN_FALL 0x89
+#define OTHER_INT_STS 0x8C
+#define OTHER_INT_LATCH 0x8D
+#define OTHER_INT_VB_SESS_VLD (1 << 7)
+#define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
+#define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
+#define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
+#define OTHER_INT_MANU (1 << 1)
+#define OTHER_INT_ABNORMAL_STRESS (1 << 0)
+
+#define ID_STATUS 0x96
+#define ID_RES_FLOAT (1 << 4)
+#define ID_RES_440K (1 << 3)
+#define ID_RES_200K (1 << 2)
+#define ID_RES_102K (1 << 1)
+#define ID_RES_GND (1 << 0)
+
+#define POWER_CTRL 0xAC
+#define POWER_CTRL_OTG_ENAB (1 << 5)
+
+#define OTHER_IFC_CTRL2 0xAF
+#define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
+#define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
+#define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
+
+#define REG_CTRL_EN 0xB2
+#define REG_CTRL_ERROR 0xB5
+#define ULPI_I2C_CONFLICT_INTEN (1 << 0)
+
+#define OTHER_FUNC_CTRL2 0xB8
+#define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
+
+/* following registers do not have separate _clr and _set registers */
+#define VBUS_DEBOUNCE 0xC0
+#define ID_DEBOUNCE 0xC1
+#define VBAT_TIMER 0xD3
+#define PHY_PWR_CTRL 0xFD
+#define PHY_PWR_PHYPWD (1 << 0)
+#define PHY_CLK_CTRL 0xFE
+#define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
+#define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
+#define REQ_PHY_DPLL_CLK (1 << 0)
+#define PHY_CLK_CTRL_STS 0xFF
+#define PHY_DPLL_CLK (1 << 0)
+
+/* In module TWL_MODULE_PM_MASTER */
+#define STS_HW_CONDITIONS 0x0F
+
+/* In module TWL_MODULE_PM_RECEIVER */
+#define VUSB_DEDICATED1 0x7D
+#define VUSB_DEDICATED2 0x7E
+#define VUSB1V5_DEV_GRP 0x71
+#define VUSB1V5_TYPE 0x72
+#define VUSB1V5_REMAP 0x73
+#define VUSB1V8_DEV_GRP 0x74
+#define VUSB1V8_TYPE 0x75
+#define VUSB1V8_REMAP 0x76
+#define VUSB3V1_DEV_GRP 0x77
+#define VUSB3V1_TYPE 0x78
+#define VUSB3V1_REMAP 0x79
+
+/* In module TWL4030_MODULE_INTBR */
+#define PMBR1 0x0D
+#define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
+
+struct twl4030_usb {
+ struct usb_phy phy;
+ struct device *dev;
+
+ /* TWL4030 internal USB regulator supplies */
+ struct regulator *usb1v5;
+ struct regulator *usb1v8;
+ struct regulator *usb3v1;
+
+ /* for vbus reporting with irqs disabled */
+ spinlock_t lock;
+
+ /* pin configuration */
+ enum twl4030_usb_mode usb_mode;
+
+ int irq;
+ enum omap_musb_vbus_id_status linkstat;
+ bool vbus_supplied;
+ u8 asleep;
+ bool irq_enabled;
+};
+
+/* internal define on top of container_of */
+#define phy_to_twl(x) container_of((x), struct twl4030_usb, phy)
+
+/*-------------------------------------------------------------------------*/
+
+static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
+ u8 module, u8 data, u8 address)
+{
+ u8 check;
+
+ if ((twl_i2c_write_u8(module, data, address) >= 0) &&
+ (twl_i2c_read_u8(module, &check, address) >= 0) &&
+ (check == data))
+ return 0;
+ dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
+ 1, module, address, check, data);
+
+ /* Failed once: Try again */
+ if ((twl_i2c_write_u8(module, data, address) >= 0) &&
+ (twl_i2c_read_u8(module, &check, address) >= 0) &&
+ (check == data))
+ return 0;
+ dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
+ 2, module, address, check, data);
+
+ /* Failed again: Return error */
+ return -EBUSY;
+}
+
+#define twl4030_usb_write_verify(twl, address, data) \
+ twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address))
+
+static inline int twl4030_usb_write(struct twl4030_usb *twl,
+ u8 address, u8 data)
+{
+ int ret = 0;
+
+ ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address);
+ if (ret < 0)
+ dev_dbg(twl->dev,
+ "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
+ return ret;
+}
+
+static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
+{
+ u8 data;
+ int ret = 0;
+
+ ret = twl_i2c_read_u8(module, &data, address);
+ if (ret >= 0)
+ ret = data;
+ else
+ dev_dbg(twl->dev,
+ "TWL4030:readb[0x%x,0x%x] Error %d\n",
+ module, address, ret);
+
+ return ret;
+}
+
+static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
+{
+ return twl4030_readb(twl, TWL_MODULE_USB, address);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static inline int
+twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
+{
+ return twl4030_usb_write(twl, ULPI_SET(reg), bits);
+}
+
+static inline int
+twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
+{
+ return twl4030_usb_write(twl, ULPI_CLR(reg), bits);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static enum omap_musb_vbus_id_status
+ twl4030_usb_linkstat(struct twl4030_usb *twl)
+{
+ int status;
+ enum omap_musb_vbus_id_status linkstat = OMAP_MUSB_UNKNOWN;
+
+ twl->vbus_supplied = false;
+
+ /*
+ * For ID/VBUS sensing, see manual section 15.4.8 ...
+ * except when using only battery backup power, two
+ * comparators produce VBUS_PRES and ID_PRES signals,
+ * which don't match docs elsewhere. But ... BIT(7)
+ * and BIT(2) of STS_HW_CONDITIONS, respectively, do
+ * seem to match up. If either is true the USB_PRES
+ * signal is active, the OTG module is activated, and
+ * its interrupt may be raised (may wake the system).
+ */
+ status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS);
+ if (status < 0)
+ dev_err(twl->dev, "USB link status err %d\n", status);
+ else if (status & (BIT(7) | BIT(2))) {
+ if (status & (BIT(7)))
+ twl->vbus_supplied = true;
+
+ if (status & BIT(2))
+ linkstat = OMAP_MUSB_ID_GROUND;
+ else
+ linkstat = OMAP_MUSB_VBUS_VALID;
+ } else {
+ if (twl->linkstat != OMAP_MUSB_UNKNOWN)
+ linkstat = OMAP_MUSB_VBUS_OFF;
+ }
+
+ dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
+ status, status, linkstat);
+
+ /* REVISIT this assumes host and peripheral controllers
+ * are registered, and that both are active...
+ */
+
+ spin_lock_irq(&twl->lock);
+ twl->linkstat = linkstat;
+ spin_unlock_irq(&twl->lock);
+
+ return linkstat;
+}
+
+static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
+{
+ twl->usb_mode = mode;
+
+ switch (mode) {
+ case T2_USB_MODE_ULPI:
+ twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL,
+ ULPI_IFC_CTRL_CARKITMODE);
+ twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
+ twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL,
+ ULPI_FUNC_CTRL_XCVRSEL_MASK |
+ ULPI_FUNC_CTRL_OPMODE_MASK);
+ break;
+ case -1:
+ /* FIXME: power on defaults */
+ break;
+ default:
+ dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
+ mode);
+ break;
+ };
+}
+
+static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
+{
+ unsigned long timeout;
+ int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
+
+ if (val >= 0) {
+ if (on) {
+ /* enable DPLL to access PHY registers over I2C */
+ val |= REQ_PHY_DPLL_CLK;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
+ (u8)val) < 0);
+
+ timeout = jiffies + HZ;
+ while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
+ PHY_DPLL_CLK)
+ && time_before(jiffies, timeout))
+ udelay(10);
+ if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
+ PHY_DPLL_CLK))
+ dev_err(twl->dev, "Timeout setting T2 HSUSB "
+ "PHY DPLL clock\n");
+ } else {
+ /* let ULPI control the DPLL clock */
+ val &= ~REQ_PHY_DPLL_CLK;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
+ (u8)val) < 0);
+ }
+ }
+}
+
+static void __twl4030_phy_power(struct twl4030_usb *twl, int on)
+{
+ u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
+
+ if (on)
+ pwr &= ~PHY_PWR_PHYPWD;
+ else
+ pwr |= PHY_PWR_PHYPWD;
+
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
+}
+
+static void twl4030_phy_power(struct twl4030_usb *twl, int on)
+{
+ if (on) {
+ regulator_enable(twl->usb3v1);
+ regulator_enable(twl->usb1v8);
+ /*
+ * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
+ * in twl4030) resets the VUSB_DEDICATED2 register. This reset
+ * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
+ * SLEEP. We work around this by clearing the bit after usv3v1
+ * is re-activated. This ensures that VUSB3V1 is really active.
+ */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
+ regulator_enable(twl->usb1v5);
+ __twl4030_phy_power(twl, 1);
+ twl4030_usb_write(twl, PHY_CLK_CTRL,
+ twl4030_usb_read(twl, PHY_CLK_CTRL) |
+ (PHY_CLK_CTRL_CLOCKGATING_EN |
+ PHY_CLK_CTRL_CLK32K_EN));
+ } else {
+ __twl4030_phy_power(twl, 0);
+ regulator_disable(twl->usb1v5);
+ regulator_disable(twl->usb1v8);
+ regulator_disable(twl->usb3v1);
+ }
+}
+
+static void twl4030_phy_suspend(struct twl4030_usb *twl, int controller_off)
+{
+ if (twl->asleep)
+ return;
+
+ twl4030_phy_power(twl, 0);
+ twl->asleep = 1;
+ dev_dbg(twl->dev, "%s\n", __func__);
+}
+
+static void __twl4030_phy_resume(struct twl4030_usb *twl)
+{
+ twl4030_phy_power(twl, 1);
+ twl4030_i2c_access(twl, 1);
+ twl4030_usb_set_mode(twl, twl->usb_mode);
+ if (twl->usb_mode == T2_USB_MODE_ULPI)
+ twl4030_i2c_access(twl, 0);
+}
+
+static void twl4030_phy_resume(struct twl4030_usb *twl)
+{
+ if (!twl->asleep)
+ return;
+ __twl4030_phy_resume(twl);
+ twl->asleep = 0;
+ dev_dbg(twl->dev, "%s\n", __func__);
+}
+
+static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
+{
+ /* Enable writing to power configuration registers */
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
+ TWL4030_PM_MASTER_PROTECT_KEY);
+
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
+ TWL4030_PM_MASTER_PROTECT_KEY);
+
+ /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/
+ /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/
+
+ /* input to VUSB3V1 LDO is from VBAT, not VBUS */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
+
+ /* Initialize 3.1V regulator */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
+
+ twl->usb3v1 = regulator_get(twl->dev, "usb3v1");
+ if (IS_ERR(twl->usb3v1))
+ return -ENODEV;
+
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
+
+ /* Initialize 1.5V regulator */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
+
+ twl->usb1v5 = regulator_get(twl->dev, "usb1v5");
+ if (IS_ERR(twl->usb1v5))
+ goto fail1;
+
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
+
+ /* Initialize 1.8V regulator */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
+
+ twl->usb1v8 = regulator_get(twl->dev, "usb1v8");
+ if (IS_ERR(twl->usb1v8))
+ goto fail2;
+
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
+
+ /* disable access to power configuration registers */
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
+ TWL4030_PM_MASTER_PROTECT_KEY);
+
+ return 0;
+
+fail2:
+ regulator_put(twl->usb1v5);
+ twl->usb1v5 = NULL;
+fail1:
+ regulator_put(twl->usb3v1);
+ twl->usb3v1 = NULL;
+ return -ENODEV;
+}
+
+static ssize_t twl4030_usb_vbus_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct twl4030_usb *twl = dev_get_drvdata(dev);
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ spin_lock_irqsave(&twl->lock, flags);
+ ret = sprintf(buf, "%s\n",
+ twl->vbus_supplied ? "on" : "off");
+ spin_unlock_irqrestore(&twl->lock, flags);
+
+ return ret;
+}
+static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
+
+static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
+{
+ struct twl4030_usb *twl = _twl;
+ enum omap_musb_vbus_id_status status;
+
+ status = twl4030_usb_linkstat(twl);
+ if (status > 0) {
+ /* FIXME add a set_power() method so that B-devices can
+ * configure the charger appropriately. It's not always
+ * correct to consume VBUS power, and how much current to
+ * consume is a function of the USB configuration chosen
+ * by the host.
+ *
+ * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
+ * its disconnect() sibling, when changing to/from the
+ * USB_LINK_VBUS state. musb_hdrc won't care until it
+ * starts to handle softconnect right.
+ */
+ if (status == OMAP_MUSB_VBUS_OFF ||
+ status == OMAP_MUSB_ID_FLOAT)
+ twl4030_phy_suspend(twl, 0);
+ else
+ twl4030_phy_resume(twl);
+
+ omap_musb_mailbox(twl->linkstat);
+ }
+ sysfs_notify(&twl->dev->kobj, NULL, "vbus");
+
+ return IRQ_HANDLED;
+}
+
+static void twl4030_usb_phy_init(struct twl4030_usb *twl)
+{
+ enum omap_musb_vbus_id_status status;
+
+ status = twl4030_usb_linkstat(twl);
+ if (status > 0) {
+ if (status == OMAP_MUSB_VBUS_OFF ||
+ status == OMAP_MUSB_ID_FLOAT) {
+ __twl4030_phy_power(twl, 0);
+ twl->asleep = 1;
+ } else {
+ __twl4030_phy_resume(twl);
+ twl->asleep = 0;
+ }
+
+ omap_musb_mailbox(twl->linkstat);
+ }
+ sysfs_notify(&twl->dev->kobj, NULL, "vbus");
+}
+
+static int twl4030_set_suspend(struct usb_phy *x, int suspend)
+{
+ struct twl4030_usb *twl = phy_to_twl(x);
+
+ if (suspend)
+ twl4030_phy_suspend(twl, 1);
+ else
+ twl4030_phy_resume(twl);
+
+ return 0;
+}
+
+static int twl4030_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ if (!otg)
+ return -ENODEV;
+
+ otg->gadget = gadget;
+ if (!gadget)
+ otg->phy->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ if (!otg)
+ return -ENODEV;
+
+ otg->host = host;
+ if (!host)
+ otg->phy->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int twl4030_usb_probe(struct platform_device *pdev)
+{
+ struct twl4030_usb_data *pdata = pdev->dev.platform_data;
+ struct twl4030_usb *twl;
+ int status, err;
+ struct usb_otg *otg;
+ struct device_node *np = pdev->dev.of_node;
+
+ twl = devm_kzalloc(&pdev->dev, sizeof *twl, GFP_KERNEL);
+ if (!twl)
+ return -ENOMEM;
+
+ if (np)
+ of_property_read_u32(np, "usb_mode",
+ (enum twl4030_usb_mode *)&twl->usb_mode);
+ else if (pdata)
+ twl->usb_mode = pdata->usb_mode;
+ else {
+ dev_err(&pdev->dev, "twl4030 initialized without pdata\n");
+ return -EINVAL;
+ }
+
+ otg = devm_kzalloc(&pdev->dev, sizeof *otg, GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ twl->dev = &pdev->dev;
+ twl->irq = platform_get_irq(pdev, 0);
+ twl->vbus_supplied = false;
+ twl->asleep = 1;
+ twl->linkstat = OMAP_MUSB_UNKNOWN;
+
+ twl->phy.dev = twl->dev;
+ twl->phy.label = "twl4030";
+ twl->phy.otg = otg;
+ twl->phy.type = USB_PHY_TYPE_USB2;
+ twl->phy.set_suspend = twl4030_set_suspend;
+
+ otg->phy = &twl->phy;
+ otg->set_host = twl4030_set_host;
+ otg->set_peripheral = twl4030_set_peripheral;
+
+ /* init spinlock for workqueue */
+ spin_lock_init(&twl->lock);
+
+ err = twl4030_usb_ldo_init(twl);
+ if (err) {
+ dev_err(&pdev->dev, "ldo init failed\n");
+ return err;
+ }
+ usb_add_phy_dev(&twl->phy);
+
+ platform_set_drvdata(pdev, twl);
+ if (device_create_file(&pdev->dev, &dev_attr_vbus))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+
+ /* Our job is to use irqs and status from the power module
+ * to keep the transceiver disabled when nothing's connected.
+ *
+ * FIXME we actually shouldn't start enabling it until the
+ * USB controller drivers have said they're ready, by calling
+ * set_host() and/or set_peripheral() ... OTG_capable boards
+ * need both handles, otherwise just one suffices.
+ */
+ twl->irq_enabled = true;
+ status = request_threaded_irq(twl->irq, NULL, twl4030_usb_irq,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT, "twl4030_usb", twl);
+ if (status < 0) {
+ dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
+ twl->irq, status);
+ return status;
+ }
+
+ /* Power down phy or make it work according to
+ * current link state.
+ */
+ twl4030_usb_phy_init(twl);
+
+ dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
+ return 0;
+}
+
+static int __exit twl4030_usb_remove(struct platform_device *pdev)
+{
+ struct twl4030_usb *twl = platform_get_drvdata(pdev);
+ int val;
+
+ free_irq(twl->irq, twl);
+ device_remove_file(twl->dev, &dev_attr_vbus);
+
+ /* set transceiver mode to power on defaults */
+ twl4030_usb_set_mode(twl, -1);
+
+ /* autogate 60MHz ULPI clock,
+ * clear dpll clock request for i2c access,
+ * disable 32KHz
+ */
+ val = twl4030_usb_read(twl, PHY_CLK_CTRL);
+ if (val >= 0) {
+ val |= PHY_CLK_CTRL_CLOCKGATING_EN;
+ val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
+ twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
+ }
+
+ /* disable complete OTG block */
+ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
+
+ if (!twl->asleep)
+ twl4030_phy_power(twl, 0);
+ regulator_put(twl->usb1v5);
+ regulator_put(twl->usb1v8);
+ regulator_put(twl->usb3v1);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id twl4030_usb_id_table[] = {
+ { .compatible = "ti,twl4030-usb" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, twl4030_usb_id_table);
+#endif
+
+static struct platform_driver twl4030_usb_driver = {
+ .probe = twl4030_usb_probe,
+ .remove = __exit_p(twl4030_usb_remove),
+ .driver = {
+ .name = "twl4030_usb",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(twl4030_usb_id_table),
+ },
+};
+
+static int __init twl4030_usb_init(void)
+{
+ return platform_driver_register(&twl4030_usb_driver);
+}
+subsys_initcall(twl4030_usb_init);
+
+static void __exit twl4030_usb_exit(void)
+{
+ platform_driver_unregister(&twl4030_usb_driver);
+}
+module_exit(twl4030_usb_exit);
+
+MODULE_ALIAS("platform:twl4030_usb");
+MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
+MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Author: Hema HK <hemahk@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/usb/musb-omap.h>
+#include <linux/usb/phy_companion.h>
+#include <linux/usb/omap_usb.h>
+#include <linux/i2c/twl.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+
+/* usb register definitions */
+#define USB_VENDOR_ID_LSB 0x00
+#define USB_VENDOR_ID_MSB 0x01
+#define USB_PRODUCT_ID_LSB 0x02
+#define USB_PRODUCT_ID_MSB 0x03
+#define USB_VBUS_CTRL_SET 0x04
+#define USB_VBUS_CTRL_CLR 0x05
+#define USB_ID_CTRL_SET 0x06
+#define USB_ID_CTRL_CLR 0x07
+#define USB_VBUS_INT_SRC 0x08
+#define USB_VBUS_INT_LATCH_SET 0x09
+#define USB_VBUS_INT_LATCH_CLR 0x0A
+#define USB_VBUS_INT_EN_LO_SET 0x0B
+#define USB_VBUS_INT_EN_LO_CLR 0x0C
+#define USB_VBUS_INT_EN_HI_SET 0x0D
+#define USB_VBUS_INT_EN_HI_CLR 0x0E
+#define USB_ID_INT_SRC 0x0F
+#define USB_ID_INT_LATCH_SET 0x10
+#define USB_ID_INT_LATCH_CLR 0x11
+
+#define USB_ID_INT_EN_LO_SET 0x12
+#define USB_ID_INT_EN_LO_CLR 0x13
+#define USB_ID_INT_EN_HI_SET 0x14
+#define USB_ID_INT_EN_HI_CLR 0x15
+#define USB_OTG_ADP_CTRL 0x16
+#define USB_OTG_ADP_HIGH 0x17
+#define USB_OTG_ADP_LOW 0x18
+#define USB_OTG_ADP_RISE 0x19
+#define USB_OTG_REVISION 0x1A
+
+/* to be moved to LDO */
+#define TWL6030_MISC2 0xE5
+#define TWL6030_CFG_LDO_PD2 0xF5
+#define TWL6030_BACKUP_REG 0xFA
+
+#define STS_HW_CONDITIONS 0x21
+
+/* In module TWL6030_MODULE_PM_MASTER */
+#define STS_HW_CONDITIONS 0x21
+#define STS_USB_ID BIT(2)
+
+/* In module TWL6030_MODULE_PM_RECEIVER */
+#define VUSB_CFG_TRANS 0x71
+#define VUSB_CFG_STATE 0x72
+#define VUSB_CFG_VOLTAGE 0x73
+
+/* in module TWL6030_MODULE_MAIN_CHARGE */
+
+#define CHARGERUSB_CTRL1 0x8
+
+#define CONTROLLER_STAT1 0x03
+#define VBUS_DET BIT(2)
+
+struct twl6030_usb {
+ struct phy_companion comparator;
+ struct device *dev;
+
+ /* for vbus reporting with irqs disabled */
+ spinlock_t lock;
+
+ struct regulator *usb3v3;
+
+ /* used to set vbus, in atomic path */
+ struct work_struct set_vbus_work;
+
+ int irq1;
+ int irq2;
+ enum omap_musb_vbus_id_status linkstat;
+ u8 asleep;
+ bool irq_enabled;
+ bool vbus_enable;
+ const char *regulator;
+};
+
+#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)
+
+/*-------------------------------------------------------------------------*/
+
+static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
+ u8 data, u8 address)
+{
+ int ret = 0;
+
+ ret = twl_i2c_write_u8(module, data, address);
+ if (ret < 0)
+ dev_err(twl->dev,
+ "Write[0x%x] Error %d\n", address, ret);
+ return ret;
+}
+
+static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
+{
+ u8 data, ret = 0;
+
+ ret = twl_i2c_read_u8(module, &data, address);
+ if (ret >= 0)
+ ret = data;
+ else
+ dev_err(twl->dev,
+ "readb[0x%x,0x%x] Error %d\n",
+ module, address, ret);
+ return ret;
+}
+
+static int twl6030_start_srp(struct phy_companion *comparator)
+{
+ struct twl6030_usb *twl = comparator_to_twl(comparator);
+
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
+
+ mdelay(100);
+ twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);
+
+ return 0;
+}
+
+static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
+{
+ /* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
+ twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG);
+
+ /* Program CFG_LDO_PD2 register and set VUSB bit */
+ twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_CFG_LDO_PD2);
+
+ /* Program MISC2 register and set bit VUSB_IN_VBAT */
+ twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2);
+
+ twl->usb3v3 = regulator_get(twl->dev, twl->regulator);
+ if (IS_ERR(twl->usb3v3))
+ return -ENODEV;
+
+ /* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
+
+ /*
+ * Program the USB_ID_CTRL_SET register to enable GND drive
+ * and the ID comparators
+ */
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
+
+ return 0;
+}
+
+static ssize_t twl6030_usb_vbus_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct twl6030_usb *twl = dev_get_drvdata(dev);
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ spin_lock_irqsave(&twl->lock, flags);
+
+ switch (twl->linkstat) {
+ case OMAP_MUSB_VBUS_VALID:
+ ret = snprintf(buf, PAGE_SIZE, "vbus\n");
+ break;
+ case OMAP_MUSB_ID_GROUND:
+ ret = snprintf(buf, PAGE_SIZE, "id\n");
+ break;
+ case OMAP_MUSB_VBUS_OFF:
+ ret = snprintf(buf, PAGE_SIZE, "none\n");
+ break;
+ default:
+ ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
+ }
+ spin_unlock_irqrestore(&twl->lock, flags);
+
+ return ret;
+}
+static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
+
+static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
+{
+ struct twl6030_usb *twl = _twl;
+ enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN;
+ u8 vbus_state, hw_state;
+
+ hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
+
+ vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
+ CONTROLLER_STAT1);
+ if (!(hw_state & STS_USB_ID)) {
+ if (vbus_state & VBUS_DET) {
+ regulator_enable(twl->usb3v3);
+ twl->asleep = 1;
+ status = OMAP_MUSB_VBUS_VALID;
+ twl->linkstat = status;
+ omap_musb_mailbox(status);
+ } else {
+ if (twl->linkstat != OMAP_MUSB_UNKNOWN) {
+ status = OMAP_MUSB_VBUS_OFF;
+ twl->linkstat = status;
+ omap_musb_mailbox(status);
+ if (twl->asleep) {
+ regulator_disable(twl->usb3v3);
+ twl->asleep = 0;
+ }
+ }
+ }
+ }
+ sysfs_notify(&twl->dev->kobj, NULL, "vbus");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
+{
+ struct twl6030_usb *twl = _twl;
+ enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN;
+ u8 hw_state;
+
+ hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
+
+ if (hw_state & STS_USB_ID) {
+
+ regulator_enable(twl->usb3v3);
+ twl->asleep = 1;
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
+ status = OMAP_MUSB_ID_GROUND;
+ twl->linkstat = status;
+ omap_musb_mailbox(status);
+ } else {
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
+ }
+ twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR);
+
+ return IRQ_HANDLED;
+}
+
+static int twl6030_enable_irq(struct twl6030_usb *twl)
+{
+ twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
+ twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
+ twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
+
+ twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
+ REG_INT_MSK_LINE_C);
+ twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
+ REG_INT_MSK_STS_C);
+ twl6030_usb_irq(twl->irq2, twl);
+ twl6030_usbotg_irq(twl->irq1, twl);
+
+ return 0;
+}
+
+static void otg_set_vbus_work(struct work_struct *data)
+{
+ struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
+ set_vbus_work);
+
+ /*
+ * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
+ * register. This enables boost mode.
+ */
+
+ if (twl->vbus_enable)
+ twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40,
+ CHARGERUSB_CTRL1);
+ else
+ twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00,
+ CHARGERUSB_CTRL1);
+}
+
+static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled)
+{
+ struct twl6030_usb *twl = comparator_to_twl(comparator);
+
+ twl->vbus_enable = enabled;
+ schedule_work(&twl->set_vbus_work);
+
+ return 0;
+}
+
+static int twl6030_usb_probe(struct platform_device *pdev)
+{
+ u32 ret;
+ struct twl6030_usb *twl;
+ int status, err;
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct twl4030_usb_data *pdata = dev->platform_data;
+
+ twl = devm_kzalloc(dev, sizeof *twl, GFP_KERNEL);
+ if (!twl)
+ return -ENOMEM;
+
+ twl->dev = &pdev->dev;
+ twl->irq1 = platform_get_irq(pdev, 0);
+ twl->irq2 = platform_get_irq(pdev, 1);
+ twl->linkstat = OMAP_MUSB_UNKNOWN;
+
+ twl->comparator.set_vbus = twl6030_set_vbus;
+ twl->comparator.start_srp = twl6030_start_srp;
+
+ ret = omap_usb2_set_comparator(&twl->comparator);
+ if (ret == -ENODEV) {
+ dev_info(&pdev->dev, "phy not ready, deferring probe");
+ return -EPROBE_DEFER;
+ }
+
+ if (np) {
+ twl->regulator = "usb";
+ } else if (pdata) {
+ if (pdata->features & TWL6025_SUBCLASS)
+ twl->regulator = "ldousb";
+ else
+ twl->regulator = "vusb";
+ } else {
+ dev_err(&pdev->dev, "twl6030 initialized without pdata\n");
+ return -EINVAL;
+ }
+
+ /* init spinlock for workqueue */
+ spin_lock_init(&twl->lock);
+
+ err = twl6030_usb_ldo_init(twl);
+ if (err) {
+ dev_err(&pdev->dev, "ldo init failed\n");
+ return err;
+ }
+
+ platform_set_drvdata(pdev, twl);
+ if (device_create_file(&pdev->dev, &dev_attr_vbus))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+
+ INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
+
+ twl->irq_enabled = true;
+ status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "twl6030_usb", twl);
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
+ twl->irq1, status);
+ device_remove_file(twl->dev, &dev_attr_vbus);
+ return status;
+ }
+
+ status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "twl6030_usb", twl);
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
+ twl->irq2, status);
+ free_irq(twl->irq1, twl);
+ device_remove_file(twl->dev, &dev_attr_vbus);
+ return status;
+ }
+
+ twl->asleep = 0;
+ twl6030_enable_irq(twl);
+ dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
+
+ return 0;
+}
+
+static int __exit twl6030_usb_remove(struct platform_device *pdev)
+{
+ struct twl6030_usb *twl = platform_get_drvdata(pdev);
+
+ twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
+ REG_INT_MSK_LINE_C);
+ twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
+ REG_INT_MSK_STS_C);
+ free_irq(twl->irq1, twl);
+ free_irq(twl->irq2, twl);
+ regulator_put(twl->usb3v3);
+ device_remove_file(twl->dev, &dev_attr_vbus);
+ cancel_work_sync(&twl->set_vbus_work);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id twl6030_usb_id_table[] = {
+ { .compatible = "ti,twl6030-usb" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, twl6030_usb_id_table);
+#endif
+
+static struct platform_driver twl6030_usb_driver = {
+ .probe = twl6030_usb_probe,
+ .remove = __exit_p(twl6030_usb_remove),
+ .driver = {
+ .name = "twl6030_usb",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(twl6030_usb_id_table),
+ },
+};
+
+static int __init twl6030_usb_init(void)
+{
+ return platform_driver_register(&twl6030_usb_driver);
+}
+subsys_initcall(twl6030_usb_init);
+
+static void __exit twl6030_usb_exit(void)
+{
+ platform_driver_unregister(&twl6030_usb_driver);
+}
+module_exit(twl6030_usb_exit);
+
+MODULE_ALIAS("platform:twl6030_usb");
+MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
+MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Generic ULPI USB transceiver support
+ *
+ * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * Based on sources from
+ *
+ * Sascha Hauer <s.hauer@pengutronix.de>
+ * Freescale Semiconductors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/usb.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+
+
+struct ulpi_info {
+ unsigned int id;
+ char *name;
+};
+
+#define ULPI_ID(vendor, product) (((vendor) << 16) | (product))
+#define ULPI_INFO(_id, _name) \
+ { \
+ .id = (_id), \
+ .name = (_name), \
+ }
+
+/* ULPI hardcoded IDs, used for probing */
+static struct ulpi_info ulpi_ids[] = {
+ ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"),
+ ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"),
+};
+
+static int ulpi_set_otg_flags(struct usb_phy *phy)
+{
+ unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN |
+ ULPI_OTG_CTRL_DM_PULLDOWN;
+
+ if (phy->flags & ULPI_OTG_ID_PULLUP)
+ flags |= ULPI_OTG_CTRL_ID_PULLUP;
+
+ /*
+ * ULPI Specification rev.1.1 default
+ * for Dp/DmPulldown is enabled.
+ */
+ if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS)
+ flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN;
+
+ if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS)
+ flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN;
+
+ if (phy->flags & ULPI_OTG_EXTVBUSIND)
+ flags |= ULPI_OTG_CTRL_EXTVBUSIND;
+
+ return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL);
+}
+
+static int ulpi_set_fc_flags(struct usb_phy *phy)
+{
+ unsigned int flags = 0;
+
+ /*
+ * ULPI Specification rev.1.1 default
+ * for XcvrSelect is Full Speed.
+ */
+ if (phy->flags & ULPI_FC_HS)
+ flags |= ULPI_FUNC_CTRL_HIGH_SPEED;
+ else if (phy->flags & ULPI_FC_LS)
+ flags |= ULPI_FUNC_CTRL_LOW_SPEED;
+ else if (phy->flags & ULPI_FC_FS4LS)
+ flags |= ULPI_FUNC_CTRL_FS4LS;
+ else
+ flags |= ULPI_FUNC_CTRL_FULL_SPEED;
+
+ if (phy->flags & ULPI_FC_TERMSEL)
+ flags |= ULPI_FUNC_CTRL_TERMSELECT;
+
+ /*
+ * ULPI Specification rev.1.1 default
+ * for OpMode is Normal Operation.
+ */
+ if (phy->flags & ULPI_FC_OP_NODRV)
+ flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
+ else if (phy->flags & ULPI_FC_OP_DIS_NRZI)
+ flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI;
+ else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP)
+ flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP;
+ else
+ flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
+
+ /*
+ * ULPI Specification rev.1.1 default
+ * for SuspendM is Powered.
+ */
+ flags |= ULPI_FUNC_CTRL_SUSPENDM;
+
+ return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL);
+}
+
+static int ulpi_set_ic_flags(struct usb_phy *phy)
+{
+ unsigned int flags = 0;
+
+ if (phy->flags & ULPI_IC_AUTORESUME)
+ flags |= ULPI_IFC_CTRL_AUTORESUME;
+
+ if (phy->flags & ULPI_IC_EXTVBUS_INDINV)
+ flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS;
+
+ if (phy->flags & ULPI_IC_IND_PASSTHRU)
+ flags |= ULPI_IFC_CTRL_PASSTHRU;
+
+ if (phy->flags & ULPI_IC_PROTECT_DIS)
+ flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE;
+
+ return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL);
+}
+
+static int ulpi_set_flags(struct usb_phy *phy)
+{
+ int ret;
+
+ ret = ulpi_set_otg_flags(phy);
+ if (ret)
+ return ret;
+
+ ret = ulpi_set_ic_flags(phy);
+ if (ret)
+ return ret;
+
+ return ulpi_set_fc_flags(phy);
+}
+
+static int ulpi_check_integrity(struct usb_phy *phy)
+{
+ int ret, i;
+ unsigned int val = 0x55;
+
+ for (i = 0; i < 2; i++) {
+ ret = usb_phy_io_write(phy, val, ULPI_SCRATCH);
+ if (ret < 0)
+ return ret;
+
+ ret = usb_phy_io_read(phy, ULPI_SCRATCH);
+ if (ret < 0)
+ return ret;
+
+ if (ret != val) {
+ pr_err("ULPI integrity check: failed!");
+ return -ENODEV;
+ }
+ val = val << 1;
+ }
+
+ pr_info("ULPI integrity check: passed.\n");
+
+ return 0;
+}
+
+static int ulpi_init(struct usb_phy *phy)
+{
+ int i, vid, pid, ret;
+ u32 ulpi_id = 0;
+
+ for (i = 0; i < 4; i++) {
+ ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i);
+ if (ret < 0)
+ return ret;
+ ulpi_id = (ulpi_id << 8) | ret;
+ }
+ vid = ulpi_id & 0xffff;
+ pid = ulpi_id >> 16;
+
+ pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);
+
+ for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) {
+ if (ulpi_ids[i].id == ULPI_ID(vid, pid)) {
+ pr_info("Found %s ULPI transceiver.\n",
+ ulpi_ids[i].name);
+ break;
+ }
+ }
+
+ ret = ulpi_check_integrity(phy);
+ if (ret)
+ return ret;
+
+ return ulpi_set_flags(phy);
+}
+
+static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct usb_phy *phy = otg->phy;
+ unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL);
+
+ if (!host) {
+ otg->host = NULL;
+ return 0;
+ }
+
+ otg->host = host;
+
+ flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE |
+ ULPI_IFC_CTRL_3_PIN_SERIAL_MODE |
+ ULPI_IFC_CTRL_CARKITMODE);
+
+ if (phy->flags & ULPI_IC_6PIN_SERIAL)
+ flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE;
+ else if (phy->flags & ULPI_IC_3PIN_SERIAL)
+ flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE;
+ else if (phy->flags & ULPI_IC_CARKIT)
+ flags |= ULPI_IFC_CTRL_CARKITMODE;
+
+ return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL);
+}
+
+static int ulpi_set_vbus(struct usb_otg *otg, bool on)
+{
+ struct usb_phy *phy = otg->phy;
+ unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL);
+
+ flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT);
+
+ if (on) {
+ if (phy->flags & ULPI_OTG_DRVVBUS)
+ flags |= ULPI_OTG_CTRL_DRVVBUS;
+
+ if (phy->flags & ULPI_OTG_DRVVBUS_EXT)
+ flags |= ULPI_OTG_CTRL_DRVVBUS_EXT;
+ }
+
+ return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL);
+}
+
+struct usb_phy *
+otg_ulpi_create(struct usb_phy_io_ops *ops,
+ unsigned int flags)
+{
+ struct usb_phy *phy;
+ struct usb_otg *otg;
+
+ phy = kzalloc(sizeof(*phy), GFP_KERNEL);
+ if (!phy)
+ return NULL;
+
+ otg = kzalloc(sizeof(*otg), GFP_KERNEL);
+ if (!otg) {
+ kfree(phy);
+ return NULL;
+ }
+
+ phy->label = "ULPI";
+ phy->flags = flags;
+ phy->io_ops = ops;
+ phy->otg = otg;
+ phy->init = ulpi_init;
+
+ otg->phy = phy;
+ otg->set_host = ulpi_set_host;
+ otg->set_vbus = ulpi_set_vbus;
+
+ return phy;
+}
+EXPORT_SYMBOL_GPL(otg_ulpi_create);
+
--- /dev/null
+/*
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/io.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+
+#define ULPI_VIEW_WAKEUP (1 << 31)
+#define ULPI_VIEW_RUN (1 << 30)
+#define ULPI_VIEW_WRITE (1 << 29)
+#define ULPI_VIEW_READ (0 << 29)
+#define ULPI_VIEW_ADDR(x) (((x) & 0xff) << 16)
+#define ULPI_VIEW_DATA_READ(x) (((x) >> 8) & 0xff)
+#define ULPI_VIEW_DATA_WRITE(x) ((x) & 0xff)
+
+static int ulpi_viewport_wait(void __iomem *view, u32 mask)
+{
+ unsigned long usec = 2000;
+
+ while (usec--) {
+ if (!(readl(view) & mask))
+ return 0;
+
+ udelay(1);
+ };
+
+ return -ETIMEDOUT;
+}
+
+static int ulpi_viewport_read(struct usb_phy *otg, u32 reg)
+{
+ int ret;
+ void __iomem *view = otg->io_priv;
+
+ writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
+ ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
+ if (ret)
+ return ret;
+
+ writel(ULPI_VIEW_RUN | ULPI_VIEW_READ | ULPI_VIEW_ADDR(reg), view);
+ ret = ulpi_viewport_wait(view, ULPI_VIEW_RUN);
+ if (ret)
+ return ret;
+
+ return ULPI_VIEW_DATA_READ(readl(view));
+}
+
+static int ulpi_viewport_write(struct usb_phy *otg, u32 val, u32 reg)
+{
+ int ret;
+ void __iomem *view = otg->io_priv;
+
+ writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
+ ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
+ if (ret)
+ return ret;
+
+ writel(ULPI_VIEW_RUN | ULPI_VIEW_WRITE | ULPI_VIEW_DATA_WRITE(val) |
+ ULPI_VIEW_ADDR(reg), view);
+
+ return ulpi_viewport_wait(view, ULPI_VIEW_RUN);
+}
+
+struct usb_phy_io_ops ulpi_viewport_access_ops = {
+ .read = ulpi_viewport_read,
+ .write = ulpi_viewport_write,
+};
projects / firefly-linux-kernel-4.4.55.git / commitdiff