From: Laurent Pinchart Date: Tue, 20 Jan 2015 22:56:02 +0000 (+0200) Subject: usb: isp1760: Move driver from drivers/usb/host/ to drivers/usb/isp1760/ X-Git-Tag: firefly_0821_release~176^2~2323^2^2~57 X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=7ef077a8ad3557f030d0407c4f56c5a0cf1e418a;p=firefly-linux-kernel-4.4.55.git usb: isp1760: Move driver from drivers/usb/host/ to drivers/usb/isp1760/ Now that this is DRD, it doesn't make sense to keep it under drivers/usb/host. Signed-off-by: Laurent Pinchart Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index ae481c37a208..8ed451dd651e 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -104,6 +104,8 @@ source "drivers/usb/dwc2/Kconfig" source "drivers/usb/chipidea/Kconfig" +source "drivers/usb/isp1760/Kconfig" + comment "USB port drivers" if USB diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile index d7be71778059..2f1e2aa42b44 100644 --- a/drivers/usb/Makefile +++ b/drivers/usb/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_USB) += core/ obj-$(CONFIG_USB_DWC3) += dwc3/ obj-$(CONFIG_USB_DWC2) += dwc2/ +obj-$(CONFIG_USB_ISP1760) += isp1760/ obj-$(CONFIG_USB_MON) += mon/ @@ -23,7 +24,6 @@ obj-$(CONFIG_USB_ISP1362_HCD) += host/ obj-$(CONFIG_USB_U132_HCD) += host/ obj-$(CONFIG_USB_R8A66597_HCD) += host/ obj-$(CONFIG_USB_HWA_HCD) += host/ -obj-$(CONFIG_USB_ISP1760_HCD) += host/ obj-$(CONFIG_USB_IMX21_HCD) += host/ obj-$(CONFIG_USB_FSL_MPH_DR_OF) += host/ obj-$(CONFIG_USB_FUSBH200_HCD) += host/ diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index c9152e260fd4..b8e213eb36cc 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -109,13 +109,6 @@ config USB_GR_UDC Select this to support Aeroflex Gaisler GRUSBDC cores from the GRLIB VHDL IP core library. -config USB_ISP1761_UDC - boolean "NXP ISP1761 USB Device Controller" - depends on USB_ISP1760_HCD - help - The NXP ISP1761 is a dual-role high-speed USB host and device - controller. - config USB_OMAP tristate "OMAP USB Device Controller" depends on ARCH_OMAP1 diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index fafc628480e0..3de291b6ac04 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -331,20 +331,6 @@ config USB_ISP116X_HCD To compile this driver as a module, choose M here: the module will be called isp116x-hcd. -config USB_ISP1760_HCD - tristate "ISP 1760 HCD support" - ---help--- - The ISP1760 chip is a USB 2.0 host controller. - - This driver does not support isochronous transfers or OTG. - This USB controller is usually attached to a non-DMA-Master - capable bus. NXP's eval kit brings this chip on PCI card - where the chip itself is behind a PLB to simulate such - a bus. - - To compile this driver as a module, choose M here: the - module will be called isp1760. - config USB_ISP1362_HCD tristate "ISP1362 HCD support" ---help--- diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 67d3f1843857..65b0b6a58599 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -5,9 +5,6 @@ # tell define_trace.h where to find the xhci trace header CFLAGS_xhci-trace.o := -I$(src) -isp1760-y := isp1760-core.o isp1760-hcd.o isp1760-if.o -isp1760-$(CONFIG_USB_ISP1761_UDC) += isp1760-udc.o - fhci-y := fhci-hcd.o fhci-hub.o fhci-q.o fhci-y += fhci-mem.o fhci-tds.o fhci-sched.o @@ -70,7 +67,6 @@ obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o -obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o obj-$(CONFIG_USB_HWA_HCD) += hwa-hc.o obj-$(CONFIG_USB_IMX21_HCD) += imx21-hcd.o obj-$(CONFIG_USB_FSL_MPH_DR_OF) += fsl-mph-dr-of.o diff --git a/drivers/usb/host/isp1760-core.c b/drivers/usb/host/isp1760-core.c deleted file mode 100644 index 727e90ad15bd..000000000000 --- a/drivers/usb/host/isp1760-core.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * Driver for the NXP ISP1760 chip - * - * Copyright 2014 Laurent Pinchart - * Copyright 2007 Sebastian Siewior - * - * Contacts: - * Sebastian Siewior - * Laurent Pinchart - * - * 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 -#include -#include -#include -#include -#include -#include - -#include "isp1760-core.h" -#include "isp1760-hcd.h" -#include "isp1760-regs.h" -#include "isp1760-udc.h" - -static void isp1760_init_core(struct isp1760_device *isp) -{ - u32 otgctrl; - u32 hwmode; - - /* Low-level chip reset */ - if (isp->rst_gpio) { - gpiod_set_value_cansleep(isp->rst_gpio, 1); - mdelay(50); - gpiod_set_value_cansleep(isp->rst_gpio, 0); - } - - /* - * Reset the host controller, including the CPU interface - * configuration. - */ - isp1760_write32(isp->regs, HC_RESET_REG, SW_RESET_RESET_ALL); - msleep(100); - - /* Setup HW Mode Control: This assumes a level active-low interrupt */ - hwmode = HW_DATA_BUS_32BIT; - - if (isp->devflags & ISP1760_FLAG_BUS_WIDTH_16) - hwmode &= ~HW_DATA_BUS_32BIT; - if (isp->devflags & ISP1760_FLAG_ANALOG_OC) - hwmode |= HW_ANA_DIGI_OC; - if (isp->devflags & ISP1760_FLAG_DACK_POL_HIGH) - hwmode |= HW_DACK_POL_HIGH; - if (isp->devflags & ISP1760_FLAG_DREQ_POL_HIGH) - hwmode |= HW_DREQ_POL_HIGH; - if (isp->devflags & ISP1760_FLAG_INTR_POL_HIGH) - hwmode |= HW_INTR_HIGH_ACT; - if (isp->devflags & ISP1760_FLAG_INTR_EDGE_TRIG) - hwmode |= HW_INTR_EDGE_TRIG; - - /* - * The ISP1761 has a dedicated DC IRQ line but supports sharing the HC - * IRQ line for both the host and device controllers. Hardcode IRQ - * sharing for now and disable the DC interrupts globally to avoid - * spurious interrupts during HCD registration. - */ - if (isp->devflags & ISP1760_FLAG_ISP1761) { - isp1760_write32(isp->regs, DC_MODE, 0); - hwmode |= HW_COMN_IRQ; - } - - /* - * We have to set this first in case we're in 16-bit mode. - * Write it twice to ensure correct upper bits if switching - * to 16-bit mode. - */ - isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); - isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); - - /* - * PORT 1 Control register of the ISP1760 is the OTG control register - * on ISP1761. - * - * TODO: Really support OTG. For now we configure port 1 in device mode - * when OTG is requested. - */ - if ((isp->devflags & ISP1760_FLAG_ISP1761) && - (isp->devflags & ISP1760_FLAG_OTG_EN)) - otgctrl = ((HW_DM_PULLDOWN | HW_DP_PULLDOWN) << 16) - | HW_OTG_DISABLE; - else - otgctrl = (HW_SW_SEL_HC_DC << 16) - | (HW_VBUS_DRV | HW_SEL_CP_EXT); - - isp1760_write32(isp->regs, HC_PORT1_CTRL, otgctrl); - - dev_info(isp->dev, "bus width: %u, oc: %s\n", - isp->devflags & ISP1760_FLAG_BUS_WIDTH_16 ? 16 : 32, - isp->devflags & ISP1760_FLAG_ANALOG_OC ? "analog" : "digital"); -} - -void isp1760_set_pullup(struct isp1760_device *isp, bool enable) -{ - isp1760_write32(isp->regs, HW_OTG_CTRL_SET, - enable ? HW_DP_PULLUP : HW_DP_PULLUP << 16); -} - -int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, - struct device *dev, unsigned int devflags) -{ - struct isp1760_device *isp; - int ret; - - if (usb_disabled()) - return -ENODEV; - - /* prevent usb-core allocating DMA pages */ - dev->dma_mask = NULL; - - isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL); - if (!isp) - return -ENOMEM; - - isp->dev = dev; - isp->devflags = devflags; - - isp->rst_gpio = devm_gpiod_get_optional(dev, NULL, GPIOD_OUT_HIGH); - if (IS_ERR(isp->rst_gpio)) - return PTR_ERR(isp->rst_gpio); - - isp->regs = devm_ioremap_resource(dev, mem); - if (IS_ERR(isp->regs)) - return PTR_ERR(isp->regs); - - isp1760_init_core(isp); - - ret = isp1760_hcd_register(&isp->hcd, isp->regs, mem, irq, - irqflags | IRQF_SHARED, dev); - if (ret < 0) - return ret; - - if (devflags & ISP1760_FLAG_ISP1761) { - ret = isp1760_udc_register(isp, irq, irqflags | IRQF_SHARED | - IRQF_DISABLED); - if (ret < 0) { - isp1760_hcd_unregister(&isp->hcd); - return ret; - } - } - - dev_set_drvdata(dev, isp); - - return 0; -} - -void isp1760_unregister(struct device *dev) -{ - struct isp1760_device *isp = dev_get_drvdata(dev); - - if (isp->devflags & ISP1760_FLAG_ISP1761) - isp1760_udc_unregister(isp); - - isp1760_hcd_unregister(&isp->hcd); -} - -MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP"); -MODULE_AUTHOR("Sebastian Siewior "); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/host/isp1760-core.h b/drivers/usb/host/isp1760-core.h deleted file mode 100644 index c70f8368a794..000000000000 --- a/drivers/usb/host/isp1760-core.h +++ /dev/null @@ -1,68 +0,0 @@ -/* - * Driver for the NXP ISP1760 chip - * - * Copyright 2014 Laurent Pinchart - * Copyright 2007 Sebastian Siewior - * - * Contacts: - * Sebastian Siewior - * Laurent Pinchart - * - * 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. - */ - -#ifndef _ISP1760_CORE_H_ -#define _ISP1760_CORE_H_ - -#include - -#include "isp1760-hcd.h" -#include "isp1760-udc.h" - -struct device; -struct gpio_desc; - -/* - * Device flags that can vary from board to board. All of these - * indicate the most "atypical" case, so that a devflags of 0 is - * a sane default configuration. - */ -#define ISP1760_FLAG_BUS_WIDTH_16 0x00000002 /* 16-bit data bus width */ -#define ISP1760_FLAG_OTG_EN 0x00000004 /* Port 1 supports OTG */ -#define ISP1760_FLAG_ANALOG_OC 0x00000008 /* Analog overcurrent */ -#define ISP1760_FLAG_DACK_POL_HIGH 0x00000010 /* DACK active high */ -#define ISP1760_FLAG_DREQ_POL_HIGH 0x00000020 /* DREQ active high */ -#define ISP1760_FLAG_ISP1761 0x00000040 /* Chip is ISP1761 */ -#define ISP1760_FLAG_INTR_POL_HIGH 0x00000080 /* Interrupt polarity active high */ -#define ISP1760_FLAG_INTR_EDGE_TRIG 0x00000100 /* Interrupt edge triggered */ - -struct isp1760_device { - struct device *dev; - - void __iomem *regs; - unsigned int devflags; - struct gpio_desc *rst_gpio; - - struct isp1760_hcd hcd; - struct isp1760_udc udc; -}; - -int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, - struct device *dev, unsigned int devflags); -void isp1760_unregister(struct device *dev); - -void isp1760_set_pullup(struct isp1760_device *isp, bool enable); - -static inline u32 isp1760_read32(void __iomem *base, u32 reg) -{ - return readl(base + reg); -} - -static inline void isp1760_write32(void __iomem *base, u32 reg, u32 val) -{ - writel(val, base + reg); -} - -#endif diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c deleted file mode 100644 index 568446c9ce8d..000000000000 --- a/drivers/usb/host/isp1760-hcd.c +++ /dev/null @@ -1,2231 +0,0 @@ -/* - * Driver for the NXP ISP1760 chip - * - * However, the code might contain some bugs. What doesn't work for sure is: - * - ISO - * - OTG - e The interrupt line is configured as active low, level. - * - * (c) 2007 Sebastian Siewior - * - * (c) 2011 Arvid Brodin - * - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "isp1760-core.h" -#include "isp1760-hcd.h" -#include "isp1760-regs.h" - -static struct kmem_cache *qtd_cachep; -static struct kmem_cache *qh_cachep; -static struct kmem_cache *urb_listitem_cachep; - -typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh, - struct isp1760_qtd *qtd); - -static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd) -{ - return *(struct isp1760_hcd **)hcd->hcd_priv; -} - -/* urb state*/ -#define DELETE_URB (0x0008) -#define NO_TRANSFER_ACTIVE (0xffffffff) - -/* Philips Proprietary Transfer Descriptor (PTD) */ -typedef __u32 __bitwise __dw; -struct ptd { - __dw dw0; - __dw dw1; - __dw dw2; - __dw dw3; - __dw dw4; - __dw dw5; - __dw dw6; - __dw dw7; -}; -#define PTD_OFFSET 0x0400 -#define ISO_PTD_OFFSET 0x0400 -#define INT_PTD_OFFSET 0x0800 -#define ATL_PTD_OFFSET 0x0c00 -#define PAYLOAD_OFFSET 0x1000 - - -/* ATL */ -/* DW0 */ -#define DW0_VALID_BIT 1 -#define FROM_DW0_VALID(x) ((x) & 0x01) -#define TO_DW0_LENGTH(x) (((u32) x) << 3) -#define TO_DW0_MAXPACKET(x) (((u32) x) << 18) -#define TO_DW0_MULTI(x) (((u32) x) << 29) -#define TO_DW0_ENDPOINT(x) (((u32) x) << 31) -/* DW1 */ -#define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3) -#define TO_DW1_PID_TOKEN(x) (((u32) x) << 10) -#define DW1_TRANS_BULK ((u32) 2 << 12) -#define DW1_TRANS_INT ((u32) 3 << 12) -#define DW1_TRANS_SPLIT ((u32) 1 << 14) -#define DW1_SE_USB_LOSPEED ((u32) 2 << 16) -#define TO_DW1_PORT_NUM(x) (((u32) x) << 18) -#define TO_DW1_HUB_NUM(x) (((u32) x) << 25) -/* DW2 */ -#define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8) -#define TO_DW2_RL(x) ((x) << 25) -#define FROM_DW2_RL(x) (((x) >> 25) & 0xf) -/* DW3 */ -#define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff) -#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff) -#define TO_DW3_NAKCOUNT(x) ((x) << 19) -#define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf) -#define TO_DW3_CERR(x) ((x) << 23) -#define FROM_DW3_CERR(x) (((x) >> 23) & 0x3) -#define TO_DW3_DATA_TOGGLE(x) ((x) << 25) -#define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1) -#define TO_DW3_PING(x) ((x) << 26) -#define FROM_DW3_PING(x) (((x) >> 26) & 0x1) -#define DW3_ERROR_BIT (1 << 28) -#define DW3_BABBLE_BIT (1 << 29) -#define DW3_HALT_BIT (1 << 30) -#define DW3_ACTIVE_BIT (1 << 31) -#define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01) - -#define INT_UNDERRUN (1 << 2) -#define INT_BABBLE (1 << 1) -#define INT_EXACT (1 << 0) - -#define SETUP_PID (2) -#define IN_PID (1) -#define OUT_PID (0) - -/* Errata 1 */ -#define RL_COUNTER (0) -#define NAK_COUNTER (0) -#define ERR_COUNTER (2) - -struct isp1760_qtd { - u8 packet_type; - void *data_buffer; - u32 payload_addr; - - /* the rest is HCD-private */ - struct list_head qtd_list; - struct urb *urb; - size_t length; - size_t actual_length; - - /* QTD_ENQUEUED: waiting for transfer (inactive) */ - /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */ - /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only - interrupt handler may touch this qtd! */ - /* QTD_XFER_COMPLETE: payload has been transferred successfully */ - /* QTD_RETIRE: transfer error/abort qtd */ -#define QTD_ENQUEUED 0 -#define QTD_PAYLOAD_ALLOC 1 -#define QTD_XFER_STARTED 2 -#define QTD_XFER_COMPLETE 3 -#define QTD_RETIRE 4 - u32 status; -}; - -/* Queue head, one for each active endpoint */ -struct isp1760_qh { - struct list_head qh_list; - struct list_head qtd_list; - u32 toggle; - u32 ping; - int slot; - int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */ -}; - -struct urb_listitem { - struct list_head urb_list; - struct urb *urb; -}; - -/* - * Access functions for isp176x registers (addresses 0..0x03FF). - */ -static u32 reg_read32(void __iomem *base, u32 reg) -{ - return isp1760_read32(base, reg); -} - -static void reg_write32(void __iomem *base, u32 reg, u32 val) -{ - isp1760_write32(base, reg, val); -} - -/* - * Access functions for isp176x memory (offset >= 0x0400). - * - * bank_reads8() reads memory locations prefetched by an earlier write to - * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi- - * bank optimizations, you should use the more generic mem_reads8() below. - * - * For access to ptd memory, use the specialized ptd_read() and ptd_write() - * below. - * - * These functions copy via MMIO data to/from the device. memcpy_{to|from}io() - * doesn't quite work because some people have to enforce 32-bit access - */ -static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr, - __u32 *dst, u32 bytes) -{ - __u32 __iomem *src; - u32 val; - __u8 *src_byteptr; - __u8 *dst_byteptr; - - src = src_base + (bank_addr | src_offset); - - if (src_offset < PAYLOAD_OFFSET) { - while (bytes >= 4) { - *dst = le32_to_cpu(__raw_readl(src)); - bytes -= 4; - src++; - dst++; - } - } else { - while (bytes >= 4) { - *dst = __raw_readl(src); - bytes -= 4; - src++; - dst++; - } - } - - if (!bytes) - return; - - /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully - * allocated. - */ - if (src_offset < PAYLOAD_OFFSET) - val = le32_to_cpu(__raw_readl(src)); - else - val = __raw_readl(src); - - dst_byteptr = (void *) dst; - src_byteptr = (void *) &val; - while (bytes > 0) { - *dst_byteptr = *src_byteptr; - dst_byteptr++; - src_byteptr++; - bytes--; - } -} - -static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst, - u32 bytes) -{ - reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0)); - ndelay(90); - bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes); -} - -static void mem_writes8(void __iomem *dst_base, u32 dst_offset, - __u32 const *src, u32 bytes) -{ - __u32 __iomem *dst; - - dst = dst_base + dst_offset; - - if (dst_offset < PAYLOAD_OFFSET) { - while (bytes >= 4) { - __raw_writel(cpu_to_le32(*src), dst); - bytes -= 4; - src++; - dst++; - } - } else { - while (bytes >= 4) { - __raw_writel(*src, dst); - bytes -= 4; - src++; - dst++; - } - } - - if (!bytes) - return; - /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the - * extra bytes should not be read by the HW. - */ - - if (dst_offset < PAYLOAD_OFFSET) - __raw_writel(cpu_to_le32(*src), dst); - else - __raw_writel(*src, dst); -} - -/* - * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET, - * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32. - */ -static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot, - struct ptd *ptd) -{ - reg_write32(base, HC_MEMORY_REG, - ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd)); - ndelay(90); - bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0), - (void *) ptd, sizeof(*ptd)); -} - -static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot, - struct ptd *ptd) -{ - mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0), - &ptd->dw1, 7*sizeof(ptd->dw1)); - /* Make sure dw0 gets written last (after other dw's and after payload) - since it contains the enable bit */ - wmb(); - mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0, - sizeof(ptd->dw0)); -} - - -/* memory management of the 60kb on the chip from 0x1000 to 0xffff */ -static void init_memory(struct isp1760_hcd *priv) -{ - int i, curr; - u32 payload_addr; - - payload_addr = PAYLOAD_OFFSET; - for (i = 0; i < BLOCK_1_NUM; i++) { - priv->memory_pool[i].start = payload_addr; - priv->memory_pool[i].size = BLOCK_1_SIZE; - priv->memory_pool[i].free = 1; - payload_addr += priv->memory_pool[i].size; - } - - curr = i; - for (i = 0; i < BLOCK_2_NUM; i++) { - priv->memory_pool[curr + i].start = payload_addr; - priv->memory_pool[curr + i].size = BLOCK_2_SIZE; - priv->memory_pool[curr + i].free = 1; - payload_addr += priv->memory_pool[curr + i].size; - } - - curr = i; - for (i = 0; i < BLOCK_3_NUM; i++) { - priv->memory_pool[curr + i].start = payload_addr; - priv->memory_pool[curr + i].size = BLOCK_3_SIZE; - priv->memory_pool[curr + i].free = 1; - payload_addr += priv->memory_pool[curr + i].size; - } - - WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE); -} - -static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int i; - - WARN_ON(qtd->payload_addr); - - if (!qtd->length) - return; - - for (i = 0; i < BLOCKS; i++) { - if (priv->memory_pool[i].size >= qtd->length && - priv->memory_pool[i].free) { - priv->memory_pool[i].free = 0; - qtd->payload_addr = priv->memory_pool[i].start; - return; - } - } -} - -static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int i; - - if (!qtd->payload_addr) - return; - - for (i = 0; i < BLOCKS; i++) { - if (priv->memory_pool[i].start == qtd->payload_addr) { - WARN_ON(priv->memory_pool[i].free); - priv->memory_pool[i].free = 1; - qtd->payload_addr = 0; - return; - } - } - - dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n", - __func__, qtd->payload_addr); - WARN_ON(1); - qtd->payload_addr = 0; -} - -static int handshake(struct usb_hcd *hcd, u32 reg, - u32 mask, u32 done, int usec) -{ - u32 result; - - do { - result = reg_read32(hcd->regs, reg); - if (result == ~0) - return -ENODEV; - result &= mask; - if (result == done) - return 0; - udelay(1); - usec--; - } while (usec > 0); - return -ETIMEDOUT; -} - -/* reset a non-running (STS_HALT == 1) controller */ -static int ehci_reset(struct usb_hcd *hcd) -{ - int retval; - struct isp1760_hcd *priv = hcd_to_priv(hcd); - - u32 command = reg_read32(hcd->regs, HC_USBCMD); - - command |= CMD_RESET; - reg_write32(hcd->regs, HC_USBCMD, command); - hcd->state = HC_STATE_HALT; - priv->next_statechange = jiffies; - retval = handshake(hcd, HC_USBCMD, - CMD_RESET, 0, 250 * 1000); - return retval; -} - -static struct isp1760_qh *qh_alloc(gfp_t flags) -{ - struct isp1760_qh *qh; - - qh = kmem_cache_zalloc(qh_cachep, flags); - if (!qh) - return NULL; - - INIT_LIST_HEAD(&qh->qh_list); - INIT_LIST_HEAD(&qh->qtd_list); - qh->slot = -1; - - return qh; -} - -static void qh_free(struct isp1760_qh *qh) -{ - WARN_ON(!list_empty(&qh->qtd_list)); - WARN_ON(qh->slot > -1); - kmem_cache_free(qh_cachep, qh); -} - -/* one-time init, only for memory state */ -static int priv_init(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 hcc_params; - int i; - - spin_lock_init(&priv->lock); - - for (i = 0; i < QH_END; i++) - INIT_LIST_HEAD(&priv->qh_list[i]); - - /* - * hw default: 1K periodic list heads, one per frame. - * periodic_size can shrink by USBCMD update if hcc_params allows. - */ - priv->periodic_size = DEFAULT_I_TDPS; - - /* controllers may cache some of the periodic schedule ... */ - hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS); - /* full frame cache */ - if (HCC_ISOC_CACHE(hcc_params)) - priv->i_thresh = 8; - else /* N microframes cached */ - priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); - - return 0; -} - -static int isp1760_hc_setup(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int result; - u32 scratch, hwmode; - - reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe); - /* Change bus pattern */ - scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG); - scratch = reg_read32(hcd->regs, HC_SCRATCH_REG); - if (scratch != 0xdeadbabe) { - dev_err(hcd->self.controller, "Scratch test failed.\n"); - return -ENODEV; - } - - /* - * The RESET_HC bit in the SW_RESET register is supposed to reset the - * host controller without touching the CPU interface registers, but at - * least on the ISP1761 it seems to behave as the RESET_ALL bit and - * reset the whole device. We thus can't use it here, so let's reset - * the host controller through the EHCI USB Command register. The device - * has been reset in core code anyway, so this shouldn't matter. - */ - reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - - result = ehci_reset(hcd); - if (result) - return result; - - /* Step 11 passed */ - - /* ATL reset */ - hwmode = reg_read32(hcd->regs, HC_HW_MODE_CTRL) & ~ALL_ATX_RESET; - reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET); - mdelay(10); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); - - reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK); - - priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS); - - return priv_init(hcd); -} - -static u32 base_to_chip(u32 base) -{ - return ((base - 0x400) >> 3); -} - -static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh) -{ - struct urb *urb; - - if (list_is_last(&qtd->qtd_list, &qh->qtd_list)) - return 1; - - urb = qtd->urb; - qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list); - return (qtd->urb != urb); -} - -/* magic numbers that can affect system performance */ -#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ -#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ -#define EHCI_TUNE_RL_TT 0 -#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ -#define EHCI_TUNE_MULT_TT 1 -#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ - -static void create_ptd_atl(struct isp1760_qh *qh, - struct isp1760_qtd *qtd, struct ptd *ptd) -{ - u32 maxpacket; - u32 multi; - u32 rl = RL_COUNTER; - u32 nak = NAK_COUNTER; - - memset(ptd, 0, sizeof(*ptd)); - - /* according to 3.6.2, max packet len can not be > 0x400 */ - maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe, - usb_pipeout(qtd->urb->pipe)); - multi = 1 + ((maxpacket >> 11) & 0x3); - maxpacket &= 0x7ff; - - /* DW0 */ - ptd->dw0 = DW0_VALID_BIT; - ptd->dw0 |= TO_DW0_LENGTH(qtd->length); - ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket); - ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); - - /* DW1 */ - ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1; - ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); - ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type); - - if (usb_pipebulk(qtd->urb->pipe)) - ptd->dw1 |= DW1_TRANS_BULK; - else if (usb_pipeint(qtd->urb->pipe)) - ptd->dw1 |= DW1_TRANS_INT; - - if (qtd->urb->dev->speed != USB_SPEED_HIGH) { - /* split transaction */ - - ptd->dw1 |= DW1_TRANS_SPLIT; - if (qtd->urb->dev->speed == USB_SPEED_LOW) - ptd->dw1 |= DW1_SE_USB_LOSPEED; - - ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport); - ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum); - - /* SE bit for Split INT transfers */ - if (usb_pipeint(qtd->urb->pipe) && - (qtd->urb->dev->speed == USB_SPEED_LOW)) - ptd->dw1 |= 2 << 16; - - rl = 0; - nak = 0; - } else { - ptd->dw0 |= TO_DW0_MULTI(multi); - if (usb_pipecontrol(qtd->urb->pipe) || - usb_pipebulk(qtd->urb->pipe)) - ptd->dw3 |= TO_DW3_PING(qh->ping); - } - /* DW2 */ - ptd->dw2 = 0; - ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr)); - ptd->dw2 |= TO_DW2_RL(rl); - - /* DW3 */ - ptd->dw3 |= TO_DW3_NAKCOUNT(nak); - ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle); - if (usb_pipecontrol(qtd->urb->pipe)) { - if (qtd->data_buffer == qtd->urb->setup_packet) - ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1); - else if (last_qtd_of_urb(qtd, qh)) - ptd->dw3 |= TO_DW3_DATA_TOGGLE(1); - } - - ptd->dw3 |= DW3_ACTIVE_BIT; - /* Cerr */ - ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER); -} - -static void transform_add_int(struct isp1760_qh *qh, - struct isp1760_qtd *qtd, struct ptd *ptd) -{ - u32 usof; - u32 period; - - /* - * Most of this is guessing. ISP1761 datasheet is quite unclear, and - * the algorithm from the original Philips driver code, which was - * pretty much used in this driver before as well, is quite horrendous - * and, i believe, incorrect. The code below follows the datasheet and - * USB2.0 spec as far as I can tell, and plug/unplug seems to be much - * more reliable this way (fingers crossed...). - */ - - if (qtd->urb->dev->speed == USB_SPEED_HIGH) { - /* urb->interval is in units of microframes (1/8 ms) */ - period = qtd->urb->interval >> 3; - - if (qtd->urb->interval > 4) - usof = 0x01; /* One bit set => - interval 1 ms * uFrame-match */ - else if (qtd->urb->interval > 2) - usof = 0x22; /* Two bits set => interval 1/2 ms */ - else if (qtd->urb->interval > 1) - usof = 0x55; /* Four bits set => interval 1/4 ms */ - else - usof = 0xff; /* All bits set => interval 1/8 ms */ - } else { - /* urb->interval is in units of frames (1 ms) */ - period = qtd->urb->interval; - usof = 0x0f; /* Execute Start Split on any of the - four first uFrames */ - - /* - * First 8 bits in dw5 is uSCS and "specifies which uSOF the - * complete split needs to be sent. Valid only for IN." Also, - * "All bits can be set to one for every transfer." (p 82, - * ISP1761 data sheet.) 0x1c is from Philips driver. Where did - * that number come from? 0xff seems to work fine... - */ - /* ptd->dw5 = 0x1c; */ - ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */ - } - - period = period >> 1;/* Ensure equal or shorter period than requested */ - period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */ - - ptd->dw2 |= period; - ptd->dw4 = usof; -} - -static void create_ptd_int(struct isp1760_qh *qh, - struct isp1760_qtd *qtd, struct ptd *ptd) -{ - create_ptd_atl(qh, qtd, ptd); - transform_add_int(qh, qtd, ptd); -} - -static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb) -__releases(priv->lock) -__acquires(priv->lock) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - - if (!urb->unlinked) { - if (urb->status == -EINPROGRESS) - urb->status = 0; - } - - if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) { - void *ptr; - for (ptr = urb->transfer_buffer; - ptr < urb->transfer_buffer + urb->transfer_buffer_length; - ptr += PAGE_SIZE) - flush_dcache_page(virt_to_page(ptr)); - } - - /* complete() can reenter this HCD */ - usb_hcd_unlink_urb_from_ep(hcd, urb); - spin_unlock(&priv->lock); - usb_hcd_giveback_urb(hcd, urb, urb->status); - spin_lock(&priv->lock); -} - -static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb, - u8 packet_type) -{ - struct isp1760_qtd *qtd; - - qtd = kmem_cache_zalloc(qtd_cachep, flags); - if (!qtd) - return NULL; - - INIT_LIST_HEAD(&qtd->qtd_list); - qtd->urb = urb; - qtd->packet_type = packet_type; - qtd->status = QTD_ENQUEUED; - qtd->actual_length = 0; - - return qtd; -} - -static void qtd_free(struct isp1760_qtd *qtd) -{ - WARN_ON(qtd->payload_addr); - kmem_cache_free(qtd_cachep, qtd); -} - -static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot, - struct isp1760_slotinfo *slots, - struct isp1760_qtd *qtd, struct isp1760_qh *qh, - struct ptd *ptd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int skip_map; - - WARN_ON((slot < 0) || (slot > 31)); - WARN_ON(qtd->length && !qtd->payload_addr); - WARN_ON(slots[slot].qtd); - WARN_ON(slots[slot].qh); - WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC); - - /* Make sure done map has not triggered from some unlinked transfer */ - if (ptd_offset == ATL_PTD_OFFSET) { - priv->atl_done_map |= reg_read32(hcd->regs, - HC_ATL_PTD_DONEMAP_REG); - priv->atl_done_map &= ~(1 << slot); - } else { - priv->int_done_map |= reg_read32(hcd->regs, - HC_INT_PTD_DONEMAP_REG); - priv->int_done_map &= ~(1 << slot); - } - - qh->slot = slot; - qtd->status = QTD_XFER_STARTED; - slots[slot].timestamp = jiffies; - slots[slot].qtd = qtd; - slots[slot].qh = qh; - ptd_write(hcd->regs, ptd_offset, slot, ptd); - - if (ptd_offset == ATL_PTD_OFFSET) { - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); - skip_map &= ~(1 << qh->slot); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); - } else { - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - skip_map &= ~(1 << qh->slot); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); - } -} - -static int is_short_bulk(struct isp1760_qtd *qtd) -{ - return (usb_pipebulk(qtd->urb->pipe) && - (qtd->actual_length < qtd->length)); -} - -static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh, - struct list_head *urb_list) -{ - int last_qtd; - struct isp1760_qtd *qtd, *qtd_next; - struct urb_listitem *urb_listitem; - - list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) { - if (qtd->status < QTD_XFER_COMPLETE) - break; - - last_qtd = last_qtd_of_urb(qtd, qh); - - if ((!last_qtd) && (qtd->status == QTD_RETIRE)) - qtd_next->status = QTD_RETIRE; - - if (qtd->status == QTD_XFER_COMPLETE) { - if (qtd->actual_length) { - switch (qtd->packet_type) { - case IN_PID: - mem_reads8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, - qtd->actual_length); - /* Fall through (?) */ - case OUT_PID: - qtd->urb->actual_length += - qtd->actual_length; - /* Fall through ... */ - case SETUP_PID: - break; - } - } - - if (is_short_bulk(qtd)) { - if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) - qtd->urb->status = -EREMOTEIO; - if (!last_qtd) - qtd_next->status = QTD_RETIRE; - } - } - - if (qtd->payload_addr) - free_mem(hcd, qtd); - - if (last_qtd) { - if ((qtd->status == QTD_RETIRE) && - (qtd->urb->status == -EINPROGRESS)) - qtd->urb->status = -EPIPE; - /* Defer calling of urb_done() since it releases lock */ - urb_listitem = kmem_cache_zalloc(urb_listitem_cachep, - GFP_ATOMIC); - if (unlikely(!urb_listitem)) - break; /* Try again on next call */ - urb_listitem->urb = qtd->urb; - list_add_tail(&urb_listitem->urb_list, urb_list); - } - - list_del(&qtd->qtd_list); - qtd_free(qtd); - } -} - -#define ENQUEUE_DEPTH 2 -static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int ptd_offset; - struct isp1760_slotinfo *slots; - int curr_slot, free_slot; - int n; - struct ptd ptd; - struct isp1760_qtd *qtd; - - if (unlikely(list_empty(&qh->qtd_list))) { - WARN_ON(1); - return; - } - - /* Make sure this endpoint's TT buffer is clean before queueing ptds */ - if (qh->tt_buffer_dirty) - return; - - if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd, - qtd_list)->urb->pipe)) { - ptd_offset = INT_PTD_OFFSET; - slots = priv->int_slots; - } else { - ptd_offset = ATL_PTD_OFFSET; - slots = priv->atl_slots; - } - - free_slot = -1; - for (curr_slot = 0; curr_slot < 32; curr_slot++) { - if ((free_slot == -1) && (slots[curr_slot].qtd == NULL)) - free_slot = curr_slot; - if (slots[curr_slot].qh == qh) - break; - } - - n = 0; - list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { - if (qtd->status == QTD_ENQUEUED) { - WARN_ON(qtd->payload_addr); - alloc_mem(hcd, qtd); - if ((qtd->length) && (!qtd->payload_addr)) - break; - - if ((qtd->length) && - ((qtd->packet_type == SETUP_PID) || - (qtd->packet_type == OUT_PID))) { - mem_writes8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, qtd->length); - } - - qtd->status = QTD_PAYLOAD_ALLOC; - } - - if (qtd->status == QTD_PAYLOAD_ALLOC) { -/* - if ((curr_slot > 31) && (free_slot == -1)) - dev_dbg(hcd->self.controller, "%s: No slot " - "available for transfer\n", __func__); -*/ - /* Start xfer for this endpoint if not already done */ - if ((curr_slot > 31) && (free_slot > -1)) { - if (usb_pipeint(qtd->urb->pipe)) - create_ptd_int(qh, qtd, &ptd); - else - create_ptd_atl(qh, qtd, &ptd); - - start_bus_transfer(hcd, ptd_offset, free_slot, - slots, qtd, qh, &ptd); - curr_slot = free_slot; - } - - n++; - if (n >= ENQUEUE_DEPTH) - break; - } - } -} - -static void schedule_ptds(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv; - struct isp1760_qh *qh, *qh_next; - struct list_head *ep_queue; - LIST_HEAD(urb_list); - struct urb_listitem *urb_listitem, *urb_listitem_next; - int i; - - if (!hcd) { - WARN_ON(1); - return; - } - - priv = hcd_to_priv(hcd); - - /* - * check finished/retired xfers, transfer payloads, call urb_done() - */ - for (i = 0; i < QH_END; i++) { - ep_queue = &priv->qh_list[i]; - list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) { - collect_qtds(hcd, qh, &urb_list); - if (list_empty(&qh->qtd_list)) - list_del(&qh->qh_list); - } - } - - list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list, - urb_list) { - isp1760_urb_done(hcd, urb_listitem->urb); - kmem_cache_free(urb_listitem_cachep, urb_listitem); - } - - /* - * Schedule packets for transfer. - * - * According to USB2.0 specification: - * - * 1st prio: interrupt xfers, up to 80 % of bandwidth - * 2nd prio: control xfers - * 3rd prio: bulk xfers - * - * ... but let's use a simpler scheme here (mostly because ISP1761 doc - * is very unclear on how to prioritize traffic): - * - * 1) Enqueue any queued control transfers, as long as payload chip mem - * and PTD ATL slots are available. - * 2) Enqueue any queued INT transfers, as long as payload chip mem - * and PTD INT slots are available. - * 3) Enqueue any queued bulk transfers, as long as payload chip mem - * and PTD ATL slots are available. - * - * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between - * conservation of chip mem and performance. - * - * I'm sure this scheme could be improved upon! - */ - for (i = 0; i < QH_END; i++) { - ep_queue = &priv->qh_list[i]; - list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) - enqueue_qtds(hcd, qh); - } -} - -#define PTD_STATE_QTD_DONE 1 -#define PTD_STATE_QTD_RELOAD 2 -#define PTD_STATE_URB_RETIRE 3 - -static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd, - struct urb *urb) -{ - __dw dw4; - int i; - - dw4 = ptd->dw4; - dw4 >>= 8; - - /* FIXME: ISP1761 datasheet does not say what to do with these. Do we - need to handle these errors? Is it done in hardware? */ - - if (ptd->dw3 & DW3_HALT_BIT) { - - urb->status = -EPROTO; /* Default unknown error */ - - for (i = 0; i < 8; i++) { - switch (dw4 & 0x7) { - case INT_UNDERRUN: - dev_dbg(hcd->self.controller, "%s: underrun " - "during uFrame %d\n", - __func__, i); - urb->status = -ECOMM; /* Could not write data */ - break; - case INT_EXACT: - dev_dbg(hcd->self.controller, "%s: transaction " - "error during uFrame %d\n", - __func__, i); - urb->status = -EPROTO; /* timeout, bad CRC, PID - error etc. */ - break; - case INT_BABBLE: - dev_dbg(hcd->self.controller, "%s: babble " - "error during uFrame %d\n", - __func__, i); - urb->status = -EOVERFLOW; - break; - } - dw4 >>= 3; - } - - return PTD_STATE_URB_RETIRE; - } - - return PTD_STATE_QTD_DONE; -} - -static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd, - struct urb *urb) -{ - WARN_ON(!ptd); - if (ptd->dw3 & DW3_HALT_BIT) { - if (ptd->dw3 & DW3_BABBLE_BIT) - urb->status = -EOVERFLOW; - else if (FROM_DW3_CERR(ptd->dw3)) - urb->status = -EPIPE; /* Stall */ - else if (ptd->dw3 & DW3_ERROR_BIT) - urb->status = -EPROTO; /* XactErr */ - else - urb->status = -EPROTO; /* Unknown */ -/* - dev_dbg(hcd->self.controller, "%s: ptd error:\n" - " dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n" - " dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n", - __func__, - ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3, - ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7); -*/ - return PTD_STATE_URB_RETIRE; - } - - if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) { - /* Transfer Error, *but* active and no HALT -> reload */ - dev_dbg(hcd->self.controller, "PID error; reloading ptd\n"); - return PTD_STATE_QTD_RELOAD; - } - - if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) { - /* - * NAKs are handled in HW by the chip. Usually if the - * device is not able to send data fast enough. - * This happens mostly on slower hardware. - */ - return PTD_STATE_QTD_RELOAD; - } - - return PTD_STATE_QTD_DONE; -} - -static void handle_done_ptds(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct ptd ptd; - struct isp1760_qh *qh; - int slot; - int state; - struct isp1760_slotinfo *slots; - u32 ptd_offset; - struct isp1760_qtd *qtd; - int modified; - int skip_map; - - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - priv->int_done_map &= ~skip_map; - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); - priv->atl_done_map &= ~skip_map; - - modified = priv->int_done_map || priv->atl_done_map; - - while (priv->int_done_map || priv->atl_done_map) { - if (priv->int_done_map) { - /* INT ptd */ - slot = __ffs(priv->int_done_map); - priv->int_done_map &= ~(1 << slot); - slots = priv->int_slots; - /* This should not trigger, and could be removed if - noone have any problems with it triggering: */ - if (!slots[slot].qh) { - WARN_ON(1); - continue; - } - ptd_offset = INT_PTD_OFFSET; - ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd); - state = check_int_transfer(hcd, &ptd, - slots[slot].qtd->urb); - } else { - /* ATL ptd */ - slot = __ffs(priv->atl_done_map); - priv->atl_done_map &= ~(1 << slot); - slots = priv->atl_slots; - /* This should not trigger, and could be removed if - noone have any problems with it triggering: */ - if (!slots[slot].qh) { - WARN_ON(1); - continue; - } - ptd_offset = ATL_PTD_OFFSET; - ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); - state = check_atl_transfer(hcd, &ptd, - slots[slot].qtd->urb); - } - - qtd = slots[slot].qtd; - slots[slot].qtd = NULL; - qh = slots[slot].qh; - slots[slot].qh = NULL; - qh->slot = -1; - - WARN_ON(qtd->status != QTD_XFER_STARTED); - - switch (state) { - case PTD_STATE_QTD_DONE: - if ((usb_pipeint(qtd->urb->pipe)) && - (qtd->urb->dev->speed != USB_SPEED_HIGH)) - qtd->actual_length = - FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3); - else - qtd->actual_length = - FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3); - - qtd->status = QTD_XFER_COMPLETE; - if (list_is_last(&qtd->qtd_list, &qh->qtd_list) || - is_short_bulk(qtd)) - qtd = NULL; - else - qtd = list_entry(qtd->qtd_list.next, - typeof(*qtd), qtd_list); - - qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); - qh->ping = FROM_DW3_PING(ptd.dw3); - break; - - case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */ - qtd->status = QTD_PAYLOAD_ALLOC; - ptd.dw0 |= DW0_VALID_BIT; - /* RL counter = ERR counter */ - ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf); - ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2)); - ptd.dw3 &= ~TO_DW3_CERR(3); - ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER); - qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); - qh->ping = FROM_DW3_PING(ptd.dw3); - break; - - case PTD_STATE_URB_RETIRE: - qtd->status = QTD_RETIRE; - if ((qtd->urb->dev->speed != USB_SPEED_HIGH) && - (qtd->urb->status != -EPIPE) && - (qtd->urb->status != -EREMOTEIO)) { - qh->tt_buffer_dirty = 1; - if (usb_hub_clear_tt_buffer(qtd->urb)) - /* Clear failed; let's hope things work - anyway */ - qh->tt_buffer_dirty = 0; - } - qtd = NULL; - qh->toggle = 0; - qh->ping = 0; - break; - - default: - WARN_ON(1); - continue; - } - - if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) { - if (slots == priv->int_slots) { - if (state == PTD_STATE_QTD_RELOAD) - dev_err(hcd->self.controller, - "%s: PTD_STATE_QTD_RELOAD on " - "interrupt packet\n", __func__); - if (state != PTD_STATE_QTD_RELOAD) - create_ptd_int(qh, qtd, &ptd); - } else { - if (state != PTD_STATE_QTD_RELOAD) - create_ptd_atl(qh, qtd, &ptd); - } - - start_bus_transfer(hcd, ptd_offset, slot, slots, qtd, - qh, &ptd); - } - } - - if (modified) - schedule_ptds(hcd); -} - -static irqreturn_t isp1760_irq(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 imask; - irqreturn_t irqret = IRQ_NONE; - - spin_lock(&priv->lock); - - if (!(hcd->state & HC_STATE_RUNNING)) - goto leave; - - imask = reg_read32(hcd->regs, HC_INTERRUPT_REG); - if (unlikely(!imask)) - goto leave; - reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */ - - priv->int_done_map |= reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG); - priv->atl_done_map |= reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG); - - handle_done_ptds(hcd); - - irqret = IRQ_HANDLED; -leave: - spin_unlock(&priv->lock); - - return irqret; -} - -/* - * Workaround for problem described in chip errata 2: - * - * Sometimes interrupts are not generated when ATL (not INT?) completion occurs. - * One solution suggested in the errata is to use SOF interrupts _instead_of_ - * ATL done interrupts (the "instead of" might be important since it seems - * enabling ATL interrupts also causes the chip to sometimes - rarely - "forget" - * to set the PTD's done bit in addition to not generating an interrupt!). - * - * So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their - * done bit is not being set. This is bad - it blocks the endpoint until reboot. - * - * If we use SOF interrupts only, we get latency between ptd completion and the - * actual handling. This is very noticeable in testusb runs which takes several - * minutes longer without ATL interrupts. - * - * A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it - * finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the - * slot's ACTIVE and VALID bits. If these are not set, the ptd is considered - * completed and its done map bit is set. - * - * The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen - * not to cause too much lag when this HW bug occurs, while still hopefully - * ensuring that the check does not falsely trigger. - */ -#define SLOT_TIMEOUT 300 -#define SLOT_CHECK_PERIOD 200 -static struct timer_list errata2_timer; - -static void errata2_function(unsigned long data) -{ - struct usb_hcd *hcd = (struct usb_hcd *) data; - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int slot; - struct ptd ptd; - unsigned long spinflags; - - spin_lock_irqsave(&priv->lock, spinflags); - - for (slot = 0; slot < 32; slot++) - if (priv->atl_slots[slot].qh && time_after(jiffies, - priv->atl_slots[slot].timestamp + - SLOT_TIMEOUT * HZ / 1000)) { - ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); - if (!FROM_DW0_VALID(ptd.dw0) && - !FROM_DW3_ACTIVE(ptd.dw3)) - priv->atl_done_map |= 1 << slot; - } - - if (priv->atl_done_map) - handle_done_ptds(hcd); - - spin_unlock_irqrestore(&priv->lock, spinflags); - - errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; - add_timer(&errata2_timer); -} - -static int isp1760_run(struct usb_hcd *hcd) -{ - int retval; - u32 temp; - u32 command; - u32 chipid; - - hcd->uses_new_polling = 1; - - hcd->state = HC_STATE_RUNNING; - - /* Set PTD interrupt AND & OR maps */ - reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0); - reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff); - reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0); - reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff); - reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0); - reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff); - /* step 23 passed */ - - temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN); - - command = reg_read32(hcd->regs, HC_USBCMD); - command &= ~(CMD_LRESET|CMD_RESET); - command |= CMD_RUN; - reg_write32(hcd->regs, HC_USBCMD, command); - - retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000); - if (retval) - return retval; - - /* - * XXX - * Spec says to write FLAG_CF as last config action, priv code grabs - * the semaphore while doing so. - */ - down_write(&ehci_cf_port_reset_rwsem); - reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF); - - retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000); - up_write(&ehci_cf_port_reset_rwsem); - if (retval) - return retval; - - init_timer(&errata2_timer); - errata2_timer.function = errata2_function; - errata2_timer.data = (unsigned long) hcd; - errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; - add_timer(&errata2_timer); - - chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG); - dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n", - chipid & 0xffff, chipid >> 16); - - /* PTD Register Init Part 2, Step 28 */ - - /* Setup registers controlling PTD checking */ - reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000); - reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000); - reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff); - reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff); - reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, - ATL_BUF_FILL | INT_BUF_FILL); - - /* GRR this is run-once init(), being done every time the HC starts. - * So long as they're part of class devices, we can't do it init() - * since the class device isn't created that early. - */ - return 0; -} - -static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len) -{ - qtd->data_buffer = databuffer; - - if (len > MAX_PAYLOAD_SIZE) - len = MAX_PAYLOAD_SIZE; - qtd->length = len; - - return qtd->length; -} - -static void qtd_list_free(struct list_head *qtd_list) -{ - struct isp1760_qtd *qtd, *qtd_next; - - list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) { - list_del(&qtd->qtd_list); - qtd_free(qtd); - } -} - -/* - * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize. - * Also calculate the PID type (SETUP/IN/OUT) for each packet. - */ -#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) -static void packetize_urb(struct usb_hcd *hcd, - struct urb *urb, struct list_head *head, gfp_t flags) -{ - struct isp1760_qtd *qtd; - void *buf; - int len, maxpacketsize; - u8 packet_type; - - /* - * URBs map to sequences of QTDs: one logical transaction - */ - - if (!urb->transfer_buffer && urb->transfer_buffer_length) { - /* XXX This looks like usb storage / SCSI bug */ - dev_err(hcd->self.controller, - "buf is null, dma is %08lx len is %d\n", - (long unsigned)urb->transfer_dma, - urb->transfer_buffer_length); - WARN_ON(1); - } - - if (usb_pipein(urb->pipe)) - packet_type = IN_PID; - else - packet_type = OUT_PID; - - if (usb_pipecontrol(urb->pipe)) { - qtd = qtd_alloc(flags, urb, SETUP_PID); - if (!qtd) - goto cleanup; - qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest)); - list_add_tail(&qtd->qtd_list, head); - - /* for zero length DATA stages, STATUS is always IN */ - if (urb->transfer_buffer_length == 0) - packet_type = IN_PID; - } - - maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe, - usb_pipeout(urb->pipe))); - - /* - * buffer gets wrapped in one or more qtds; - * last one may be "short" (including zero len) - * and may serve as a control status ack - */ - buf = urb->transfer_buffer; - len = urb->transfer_buffer_length; - - for (;;) { - int this_qtd_len; - - qtd = qtd_alloc(flags, urb, packet_type); - if (!qtd) - goto cleanup; - this_qtd_len = qtd_fill(qtd, buf, len); - list_add_tail(&qtd->qtd_list, head); - - len -= this_qtd_len; - buf += this_qtd_len; - - if (len <= 0) - break; - } - - /* - * control requests may need a terminating data "status" ack; - * bulk ones may need a terminating short packet (zero length). - */ - if (urb->transfer_buffer_length != 0) { - int one_more = 0; - - if (usb_pipecontrol(urb->pipe)) { - one_more = 1; - if (packet_type == IN_PID) - packet_type = OUT_PID; - else - packet_type = IN_PID; - } else if (usb_pipebulk(urb->pipe) - && (urb->transfer_flags & URB_ZERO_PACKET) - && !(urb->transfer_buffer_length % - maxpacketsize)) { - one_more = 1; - } - if (one_more) { - qtd = qtd_alloc(flags, urb, packet_type); - if (!qtd) - goto cleanup; - - /* never any data in such packets */ - qtd_fill(qtd, NULL, 0); - list_add_tail(&qtd->qtd_list, head); - } - } - - return; - -cleanup: - qtd_list_free(head); -} - -static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, - gfp_t mem_flags) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct list_head *ep_queue; - struct isp1760_qh *qh, *qhit; - unsigned long spinflags; - LIST_HEAD(new_qtds); - int retval; - int qh_in_queue; - - switch (usb_pipetype(urb->pipe)) { - case PIPE_CONTROL: - ep_queue = &priv->qh_list[QH_CONTROL]; - break; - case PIPE_BULK: - ep_queue = &priv->qh_list[QH_BULK]; - break; - case PIPE_INTERRUPT: - if (urb->interval < 0) - return -EINVAL; - /* FIXME: Check bandwidth */ - ep_queue = &priv->qh_list[QH_INTERRUPT]; - break; - case PIPE_ISOCHRONOUS: - dev_err(hcd->self.controller, "%s: isochronous USB packets " - "not yet supported\n", - __func__); - return -EPIPE; - default: - dev_err(hcd->self.controller, "%s: unknown pipe type\n", - __func__); - return -EPIPE; - } - - if (usb_pipein(urb->pipe)) - urb->actual_length = 0; - - packetize_urb(hcd, urb, &new_qtds, mem_flags); - if (list_empty(&new_qtds)) - return -ENOMEM; - - retval = 0; - spin_lock_irqsave(&priv->lock, spinflags); - - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { - retval = -ESHUTDOWN; - qtd_list_free(&new_qtds); - goto out; - } - retval = usb_hcd_link_urb_to_ep(hcd, urb); - if (retval) { - qtd_list_free(&new_qtds); - goto out; - } - - qh = urb->ep->hcpriv; - if (qh) { - qh_in_queue = 0; - list_for_each_entry(qhit, ep_queue, qh_list) { - if (qhit == qh) { - qh_in_queue = 1; - break; - } - } - if (!qh_in_queue) - list_add_tail(&qh->qh_list, ep_queue); - } else { - qh = qh_alloc(GFP_ATOMIC); - if (!qh) { - retval = -ENOMEM; - usb_hcd_unlink_urb_from_ep(hcd, urb); - qtd_list_free(&new_qtds); - goto out; - } - list_add_tail(&qh->qh_list, ep_queue); - urb->ep->hcpriv = qh; - } - - list_splice_tail(&new_qtds, &qh->qtd_list); - schedule_ptds(hcd); - -out: - spin_unlock_irqrestore(&priv->lock, spinflags); - return retval; -} - -static void kill_transfer(struct usb_hcd *hcd, struct urb *urb, - struct isp1760_qh *qh) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int skip_map; - - WARN_ON(qh->slot == -1); - - /* We need to forcefully reclaim the slot since some transfers never - return, e.g. interrupt transfers and NAKed bulk transfers. */ - if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) { - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); - skip_map |= (1 << qh->slot); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); - priv->atl_slots[qh->slot].qh = NULL; - priv->atl_slots[qh->slot].qtd = NULL; - } else { - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - skip_map |= (1 << qh->slot); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); - priv->int_slots[qh->slot].qh = NULL; - priv->int_slots[qh->slot].qtd = NULL; - } - - qh->slot = -1; -} - -/* - * Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing - * any active transfer belonging to the urb in the process. - */ -static void dequeue_urb_from_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh, - struct isp1760_qtd *qtd) -{ - struct urb *urb; - int urb_was_running; - - urb = qtd->urb; - urb_was_running = 0; - list_for_each_entry_from(qtd, &qh->qtd_list, qtd_list) { - if (qtd->urb != urb) - break; - - if (qtd->status >= QTD_XFER_STARTED) - urb_was_running = 1; - if (last_qtd_of_urb(qtd, qh) && - (qtd->status >= QTD_XFER_COMPLETE)) - urb_was_running = 0; - - if (qtd->status == QTD_XFER_STARTED) - kill_transfer(hcd, urb, qh); - qtd->status = QTD_RETIRE; - } - - if ((urb->dev->speed != USB_SPEED_HIGH) && urb_was_running) { - qh->tt_buffer_dirty = 1; - if (usb_hub_clear_tt_buffer(urb)) - /* Clear failed; let's hope things work anyway */ - qh->tt_buffer_dirty = 0; - } -} - -static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, - int status) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - unsigned long spinflags; - struct isp1760_qh *qh; - struct isp1760_qtd *qtd; - int retval = 0; - - spin_lock_irqsave(&priv->lock, spinflags); - retval = usb_hcd_check_unlink_urb(hcd, urb, status); - if (retval) - goto out; - - qh = urb->ep->hcpriv; - if (!qh) { - retval = -EINVAL; - goto out; - } - - list_for_each_entry(qtd, &qh->qtd_list, qtd_list) - if (qtd->urb == urb) { - dequeue_urb_from_qtd(hcd, qh, qtd); - list_move(&qtd->qtd_list, &qh->qtd_list); - break; - } - - urb->status = status; - schedule_ptds(hcd); - -out: - spin_unlock_irqrestore(&priv->lock, spinflags); - return retval; -} - -static void isp1760_endpoint_disable(struct usb_hcd *hcd, - struct usb_host_endpoint *ep) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - unsigned long spinflags; - struct isp1760_qh *qh, *qh_iter; - int i; - - spin_lock_irqsave(&priv->lock, spinflags); - - qh = ep->hcpriv; - if (!qh) - goto out; - - WARN_ON(!list_empty(&qh->qtd_list)); - - for (i = 0; i < QH_END; i++) - list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list) - if (qh_iter == qh) { - list_del(&qh_iter->qh_list); - i = QH_END; - break; - } - qh_free(qh); - ep->hcpriv = NULL; - - schedule_ptds(hcd); - -out: - spin_unlock_irqrestore(&priv->lock, spinflags); -} - -static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 temp, status = 0; - u32 mask; - int retval = 1; - unsigned long flags; - - /* if !PM, root hub timers won't get shut down ... */ - if (!HC_IS_RUNNING(hcd->state)) - return 0; - - /* init status to no-changes */ - buf[0] = 0; - mask = PORT_CSC; - - spin_lock_irqsave(&priv->lock, flags); - temp = reg_read32(hcd->regs, HC_PORTSC1); - - if (temp & PORT_OWNER) { - if (temp & PORT_CSC) { - temp &= ~PORT_CSC; - reg_write32(hcd->regs, HC_PORTSC1, temp); - goto done; - } - } - - /* - * Return status information even for ports with OWNER set. - * Otherwise hub_wq wouldn't see the disconnect event when a - * high-speed device is switched over to the companion - * controller by the user. - */ - - if ((temp & mask) != 0 - || ((temp & PORT_RESUME) != 0 - && time_after_eq(jiffies, - priv->reset_done))) { - buf [0] |= 1 << (0 + 1); - status = STS_PCD; - } - /* FIXME autosuspend idle root hubs */ -done: - spin_unlock_irqrestore(&priv->lock, flags); - return status ? retval : 0; -} - -static void isp1760_hub_descriptor(struct isp1760_hcd *priv, - struct usb_hub_descriptor *desc) -{ - int ports = HCS_N_PORTS(priv->hcs_params); - u16 temp; - - desc->bDescriptorType = 0x29; - /* priv 1.0, 2.3.9 says 20ms max */ - desc->bPwrOn2PwrGood = 10; - desc->bHubContrCurrent = 0; - - desc->bNbrPorts = ports; - temp = 1 + (ports / 8); - desc->bDescLength = 7 + 2 * temp; - - /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ - memset(&desc->u.hs.DeviceRemovable[0], 0, temp); - memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); - - /* per-port overcurrent reporting */ - temp = 0x0008; - if (HCS_PPC(priv->hcs_params)) - /* per-port power control */ - temp |= 0x0001; - else - /* no power switching */ - temp |= 0x0002; - desc->wHubCharacteristics = cpu_to_le16(temp); -} - -#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) - -static int check_reset_complete(struct usb_hcd *hcd, int index, - int port_status) -{ - if (!(port_status & PORT_CONNECT)) - return port_status; - - /* if reset finished and it's still not enabled -- handoff */ - if (!(port_status & PORT_PE)) { - - dev_info(hcd->self.controller, - "port %d full speed --> companion\n", - index + 1); - - port_status |= PORT_OWNER; - port_status &= ~PORT_RWC_BITS; - reg_write32(hcd->regs, HC_PORTSC1, port_status); - - } else - dev_info(hcd->self.controller, "port %d high speed\n", - index + 1); - - return port_status; -} - -static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq, - u16 wValue, u16 wIndex, char *buf, u16 wLength) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int ports = HCS_N_PORTS(priv->hcs_params); - u32 temp, status; - unsigned long flags; - int retval = 0; - unsigned selector; - - /* - * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. - * HCS_INDICATOR may say we can change LEDs to off/amber/green. - * (track current state ourselves) ... blink for diagnostics, - * power, "this is the one", etc. EHCI spec supports this. - */ - - spin_lock_irqsave(&priv->lock, flags); - switch (typeReq) { - case ClearHubFeature: - switch (wValue) { - case C_HUB_LOCAL_POWER: - case C_HUB_OVER_CURRENT: - /* no hub-wide feature/status flags */ - break; - default: - goto error; - } - break; - case ClearPortFeature: - if (!wIndex || wIndex > ports) - goto error; - wIndex--; - temp = reg_read32(hcd->regs, HC_PORTSC1); - - /* - * Even if OWNER is set, so the port is owned by the - * companion controller, hub_wq needs to be able to clear - * the port-change status bits (especially - * USB_PORT_STAT_C_CONNECTION). - */ - - switch (wValue) { - case USB_PORT_FEAT_ENABLE: - reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE); - break; - case USB_PORT_FEAT_C_ENABLE: - /* XXX error? */ - break; - case USB_PORT_FEAT_SUSPEND: - if (temp & PORT_RESET) - goto error; - - if (temp & PORT_SUSPEND) { - if ((temp & PORT_PE) == 0) - goto error; - /* resume signaling for 20 msec */ - temp &= ~(PORT_RWC_BITS); - reg_write32(hcd->regs, HC_PORTSC1, - temp | PORT_RESUME); - priv->reset_done = jiffies + - msecs_to_jiffies(20); - } - break; - case USB_PORT_FEAT_C_SUSPEND: - /* we auto-clear this feature */ - break; - case USB_PORT_FEAT_POWER: - if (HCS_PPC(priv->hcs_params)) - reg_write32(hcd->regs, HC_PORTSC1, - temp & ~PORT_POWER); - break; - case USB_PORT_FEAT_C_CONNECTION: - reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC); - break; - case USB_PORT_FEAT_C_OVER_CURRENT: - /* XXX error ?*/ - break; - case USB_PORT_FEAT_C_RESET: - /* GetPortStatus clears reset */ - break; - default: - goto error; - } - reg_read32(hcd->regs, HC_USBCMD); - break; - case GetHubDescriptor: - isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *) - buf); - break; - case GetHubStatus: - /* no hub-wide feature/status flags */ - memset(buf, 0, 4); - break; - case GetPortStatus: - if (!wIndex || wIndex > ports) - goto error; - wIndex--; - status = 0; - temp = reg_read32(hcd->regs, HC_PORTSC1); - - /* wPortChange bits */ - if (temp & PORT_CSC) - status |= USB_PORT_STAT_C_CONNECTION << 16; - - - /* whoever resumes must GetPortStatus to complete it!! */ - if (temp & PORT_RESUME) { - dev_err(hcd->self.controller, "Port resume should be skipped.\n"); - - /* Remote Wakeup received? */ - if (!priv->reset_done) { - /* resume signaling for 20 msec */ - priv->reset_done = jiffies - + msecs_to_jiffies(20); - /* check the port again */ - mod_timer(&hcd->rh_timer, priv->reset_done); - } - - /* resume completed? */ - else if (time_after_eq(jiffies, - priv->reset_done)) { - status |= USB_PORT_STAT_C_SUSPEND << 16; - priv->reset_done = 0; - - /* stop resume signaling */ - temp = reg_read32(hcd->regs, HC_PORTSC1); - reg_write32(hcd->regs, HC_PORTSC1, - temp & ~(PORT_RWC_BITS | PORT_RESUME)); - retval = handshake(hcd, HC_PORTSC1, - PORT_RESUME, 0, 2000 /* 2msec */); - if (retval != 0) { - dev_err(hcd->self.controller, - "port %d resume error %d\n", - wIndex + 1, retval); - goto error; - } - temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); - } - } - - /* whoever resets must GetPortStatus to complete it!! */ - if ((temp & PORT_RESET) - && time_after_eq(jiffies, - priv->reset_done)) { - status |= USB_PORT_STAT_C_RESET << 16; - priv->reset_done = 0; - - /* force reset to complete */ - reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET); - /* REVISIT: some hardware needs 550+ usec to clear - * this bit; seems too long to spin routinely... - */ - retval = handshake(hcd, HC_PORTSC1, - PORT_RESET, 0, 750); - if (retval != 0) { - dev_err(hcd->self.controller, "port %d reset error %d\n", - wIndex + 1, retval); - goto error; - } - - /* see what we found out */ - temp = check_reset_complete(hcd, wIndex, - reg_read32(hcd->regs, HC_PORTSC1)); - } - /* - * Even if OWNER is set, there's no harm letting hub_wq - * see the wPortStatus values (they should all be 0 except - * for PORT_POWER anyway). - */ - - if (temp & PORT_OWNER) - dev_err(hcd->self.controller, "PORT_OWNER is set\n"); - - if (temp & PORT_CONNECT) { - status |= USB_PORT_STAT_CONNECTION; - /* status may be from integrated TT */ - status |= USB_PORT_STAT_HIGH_SPEED; - } - if (temp & PORT_PE) - status |= USB_PORT_STAT_ENABLE; - if (temp & (PORT_SUSPEND|PORT_RESUME)) - status |= USB_PORT_STAT_SUSPEND; - if (temp & PORT_RESET) - status |= USB_PORT_STAT_RESET; - if (temp & PORT_POWER) - status |= USB_PORT_STAT_POWER; - - put_unaligned(cpu_to_le32(status), (__le32 *) buf); - break; - case SetHubFeature: - switch (wValue) { - case C_HUB_LOCAL_POWER: - case C_HUB_OVER_CURRENT: - /* no hub-wide feature/status flags */ - break; - default: - goto error; - } - break; - case SetPortFeature: - selector = wIndex >> 8; - wIndex &= 0xff; - if (!wIndex || wIndex > ports) - goto error; - wIndex--; - temp = reg_read32(hcd->regs, HC_PORTSC1); - if (temp & PORT_OWNER) - break; - -/* temp &= ~PORT_RWC_BITS; */ - switch (wValue) { - case USB_PORT_FEAT_ENABLE: - reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE); - break; - - case USB_PORT_FEAT_SUSPEND: - if ((temp & PORT_PE) == 0 - || (temp & PORT_RESET) != 0) - goto error; - - reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND); - break; - case USB_PORT_FEAT_POWER: - if (HCS_PPC(priv->hcs_params)) - reg_write32(hcd->regs, HC_PORTSC1, - temp | PORT_POWER); - break; - case USB_PORT_FEAT_RESET: - if (temp & PORT_RESUME) - goto error; - /* line status bits may report this as low speed, - * which can be fine if this root hub has a - * transaction translator built in. - */ - if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT - && PORT_USB11(temp)) { - temp |= PORT_OWNER; - } else { - temp |= PORT_RESET; - temp &= ~PORT_PE; - - /* - * caller must wait, then call GetPortStatus - * usb 2.0 spec says 50 ms resets on root - */ - priv->reset_done = jiffies + - msecs_to_jiffies(50); - } - reg_write32(hcd->regs, HC_PORTSC1, temp); - break; - default: - goto error; - } - reg_read32(hcd->regs, HC_USBCMD); - break; - - default: -error: - /* "stall" on error */ - retval = -EPIPE; - } - spin_unlock_irqrestore(&priv->lock, flags); - return retval; -} - -static int isp1760_get_frame(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 fr; - - fr = reg_read32(hcd->regs, HC_FRINDEX); - return (fr >> 3) % priv->periodic_size; -} - -static void isp1760_stop(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 temp; - - del_timer(&errata2_timer); - - isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1, - NULL, 0); - mdelay(20); - - spin_lock_irq(&priv->lock); - ehci_reset(hcd); - /* Disable IRQ */ - temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); - spin_unlock_irq(&priv->lock); - - reg_write32(hcd->regs, HC_CONFIGFLAG, 0); -} - -static void isp1760_shutdown(struct usb_hcd *hcd) -{ - u32 command, temp; - - isp1760_stop(hcd); - temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); - - command = reg_read32(hcd->regs, HC_USBCMD); - command &= ~CMD_RUN; - reg_write32(hcd->regs, HC_USBCMD, command); -} - -static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd, - struct usb_host_endpoint *ep) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct isp1760_qh *qh = ep->hcpriv; - unsigned long spinflags; - - if (!qh) - return; - - spin_lock_irqsave(&priv->lock, spinflags); - qh->tt_buffer_dirty = 0; - schedule_ptds(hcd); - spin_unlock_irqrestore(&priv->lock, spinflags); -} - - -static const struct hc_driver isp1760_hc_driver = { - .description = "isp1760-hcd", - .product_desc = "NXP ISP1760 USB Host Controller", - .hcd_priv_size = sizeof(struct isp1760_hcd *), - .irq = isp1760_irq, - .flags = HCD_MEMORY | HCD_USB2, - .reset = isp1760_hc_setup, - .start = isp1760_run, - .stop = isp1760_stop, - .shutdown = isp1760_shutdown, - .urb_enqueue = isp1760_urb_enqueue, - .urb_dequeue = isp1760_urb_dequeue, - .endpoint_disable = isp1760_endpoint_disable, - .get_frame_number = isp1760_get_frame, - .hub_status_data = isp1760_hub_status_data, - .hub_control = isp1760_hub_control, - .clear_tt_buffer_complete = isp1760_clear_tt_buffer_complete, -}; - -int __init isp1760_init_kmem_once(void) -{ - urb_listitem_cachep = kmem_cache_create("isp1760_urb_listitem", - sizeof(struct urb_listitem), 0, SLAB_TEMPORARY | - SLAB_MEM_SPREAD, NULL); - - if (!urb_listitem_cachep) - return -ENOMEM; - - qtd_cachep = kmem_cache_create("isp1760_qtd", - sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY | - SLAB_MEM_SPREAD, NULL); - - if (!qtd_cachep) - return -ENOMEM; - - qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh), - 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL); - - if (!qh_cachep) { - kmem_cache_destroy(qtd_cachep); - return -ENOMEM; - } - - return 0; -} - -void isp1760_deinit_kmem_cache(void) -{ - kmem_cache_destroy(qtd_cachep); - kmem_cache_destroy(qh_cachep); - kmem_cache_destroy(urb_listitem_cachep); -} - -int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs, - struct resource *mem, int irq, unsigned long irqflags, - struct device *dev) -{ - struct usb_hcd *hcd; - int ret; - - hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev)); - if (!hcd) - return -ENOMEM; - - *(struct isp1760_hcd **)hcd->hcd_priv = priv; - - priv->hcd = hcd; - - init_memory(priv); - - hcd->irq = irq; - hcd->regs = regs; - hcd->rsrc_start = mem->start; - hcd->rsrc_len = resource_size(mem); - - ret = usb_add_hcd(hcd, irq, irqflags); - if (ret) - goto error; - - device_wakeup_enable(hcd->self.controller); - - return 0; - -error: - usb_put_hcd(hcd); - return ret; -} - -void isp1760_hcd_unregister(struct isp1760_hcd *priv) -{ - usb_remove_hcd(priv->hcd); - usb_put_hcd(priv->hcd); -} diff --git a/drivers/usb/host/isp1760-hcd.h b/drivers/usb/host/isp1760-hcd.h deleted file mode 100644 index df7ea3684b77..000000000000 --- a/drivers/usb/host/isp1760-hcd.h +++ /dev/null @@ -1,77 +0,0 @@ -#ifndef _ISP1760_HCD_H_ -#define _ISP1760_HCD_H_ - -#include - -struct isp1760_qh; -struct isp1760_qtd; -struct resource; -struct usb_hcd; - -/* - * 60kb divided in: - * - 32 blocks @ 256 bytes - * - 20 blocks @ 1024 bytes - * - 4 blocks @ 8192 bytes - */ - -#define BLOCK_1_NUM 32 -#define BLOCK_2_NUM 20 -#define BLOCK_3_NUM 4 - -#define BLOCK_1_SIZE 256 -#define BLOCK_2_SIZE 1024 -#define BLOCK_3_SIZE 8192 -#define BLOCKS (BLOCK_1_NUM + BLOCK_2_NUM + BLOCK_3_NUM) -#define MAX_PAYLOAD_SIZE BLOCK_3_SIZE -#define PAYLOAD_AREA_SIZE 0xf000 - -struct isp1760_slotinfo { - struct isp1760_qh *qh; - struct isp1760_qtd *qtd; - unsigned long timestamp; -}; - -/* chip memory management */ -struct isp1760_memory_chunk { - unsigned int start; - unsigned int size; - unsigned int free; -}; - -enum isp1760_queue_head_types { - QH_CONTROL, - QH_BULK, - QH_INTERRUPT, - QH_END -}; - -struct isp1760_hcd { - struct usb_hcd *hcd; - - u32 hcs_params; - spinlock_t lock; - struct isp1760_slotinfo atl_slots[32]; - int atl_done_map; - struct isp1760_slotinfo int_slots[32]; - int int_done_map; - struct isp1760_memory_chunk memory_pool[BLOCKS]; - struct list_head qh_list[QH_END]; - - /* periodic schedule support */ -#define DEFAULT_I_TDPS 1024 - unsigned periodic_size; - unsigned i_thresh; - unsigned long reset_done; - unsigned long next_statechange; -}; - -int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs, - struct resource *mem, int irq, unsigned long irqflags, - struct device *dev); -void isp1760_hcd_unregister(struct isp1760_hcd *priv); - -int isp1760_init_kmem_once(void); -void isp1760_deinit_kmem_cache(void); - -#endif /* _ISP1760_HCD_H_ */ diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c deleted file mode 100644 index c2a94c966350..000000000000 --- a/drivers/usb/host/isp1760-if.c +++ /dev/null @@ -1,312 +0,0 @@ -/* - * Glue code for the ISP1760 driver and bus - * Currently there is support for - * - OpenFirmware - * - PCI - * - PDEV (generic platform device centralized driver model) - * - * (c) 2007 Sebastian Siewior - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include "isp1760-core.h" -#include "isp1760-regs.h" - -#ifdef CONFIG_PCI -#include -#endif - -#ifdef CONFIG_PCI -static int isp1761_pci_init(struct pci_dev *dev) -{ - resource_size_t mem_start; - resource_size_t mem_length; - u8 __iomem *iobase; - u8 latency, limit; - int retry_count; - u32 reg_data; - - /* Grab the PLX PCI shared memory of the ISP 1761 we need */ - mem_start = pci_resource_start(dev, 3); - mem_length = pci_resource_len(dev, 3); - if (mem_length < 0xffff) { - printk(KERN_ERR "memory length for this resource is wrong\n"); - return -ENOMEM; - } - - if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) { - printk(KERN_ERR "host controller already in use\n"); - return -EBUSY; - } - - /* map available memory */ - iobase = ioremap_nocache(mem_start, mem_length); - if (!iobase) { - printk(KERN_ERR "Error ioremap failed\n"); - release_mem_region(mem_start, mem_length); - return -ENOMEM; - } - - /* bad pci latencies can contribute to overruns */ - pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency); - if (latency) { - pci_read_config_byte(dev, PCI_MAX_LAT, &limit); - if (limit && limit < latency) - pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit); - } - - /* Try to check whether we can access Scratch Register of - * Host Controller or not. The initial PCI access is retried until - * local init for the PCI bridge is completed - */ - retry_count = 20; - reg_data = 0; - while ((reg_data != 0xFACE) && retry_count) { - /*by default host is in 16bit mode, so - * io operations at this stage must be 16 bit - * */ - writel(0xface, iobase + HC_SCRATCH_REG); - udelay(100); - reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff; - retry_count--; - } - - iounmap(iobase); - release_mem_region(mem_start, mem_length); - - /* Host Controller presence is detected by writing to scratch register - * and reading back and checking the contents are same or not - */ - if (reg_data != 0xFACE) { - dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data); - return -ENOMEM; - } - - /* Grab the PLX PCI mem maped port start address we need */ - mem_start = pci_resource_start(dev, 0); - mem_length = pci_resource_len(dev, 0); - - if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) { - printk(KERN_ERR "request region #1\n"); - return -EBUSY; - } - - iobase = ioremap_nocache(mem_start, mem_length); - if (!iobase) { - printk(KERN_ERR "ioremap #1\n"); - release_mem_region(mem_start, mem_length); - return -ENOMEM; - } - - /* configure PLX PCI chip to pass interrupts */ -#define PLX_INT_CSR_REG 0x68 - reg_data = readl(iobase + PLX_INT_CSR_REG); - reg_data |= 0x900; - writel(reg_data, iobase + PLX_INT_CSR_REG); - - /* done with PLX IO access */ - iounmap(iobase); - release_mem_region(mem_start, mem_length); - - return 0; -} - -static int isp1761_pci_probe(struct pci_dev *dev, - const struct pci_device_id *id) -{ - unsigned int devflags = 0; - int ret; - - if (usb_disabled()) - return -ENODEV; - - if (!dev->irq) - return -ENODEV; - - if (pci_enable_device(dev) < 0) - return -ENODEV; - - ret = isp1761_pci_init(dev); - if (ret < 0) - goto error; - - pci_set_master(dev); - - dev->dev.dma_mask = NULL; - ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev, - devflags); - if (ret < 0) - goto error; - - return 0; - -error: - pci_disable_device(dev); - return ret; -} - -static void isp1761_pci_remove(struct pci_dev *dev) -{ - isp1760_unregister(&dev->dev); - - pci_disable_device(dev); -} - -static void isp1761_pci_shutdown(struct pci_dev *dev) -{ - printk(KERN_ERR "ips1761_pci_shutdown\n"); -} - -static const struct pci_device_id isp1760_plx [] = { - { - .class = PCI_CLASS_BRIDGE_OTHER << 8, - .class_mask = ~0, - .vendor = PCI_VENDOR_ID_PLX, - .device = 0x5406, - .subvendor = PCI_VENDOR_ID_PLX, - .subdevice = 0x9054, - }, - { } -}; -MODULE_DEVICE_TABLE(pci, isp1760_plx); - -static struct pci_driver isp1761_pci_driver = { - .name = "isp1760", - .id_table = isp1760_plx, - .probe = isp1761_pci_probe, - .remove = isp1761_pci_remove, - .shutdown = isp1761_pci_shutdown, -}; -#endif - -static int isp1760_plat_probe(struct platform_device *pdev) -{ - unsigned long irqflags; - unsigned int devflags = 0; - struct resource *mem_res; - struct resource *irq_res; - int ret; - - mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq_res) { - pr_warning("isp1760: IRQ resource not available\n"); - return -ENODEV; - } - irqflags = irq_res->flags & IRQF_TRIGGER_MASK; - - if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { - struct device_node *dp = pdev->dev.of_node; - u32 bus_width = 0; - - if (of_device_is_compatible(dp, "nxp,usb-isp1761")) - devflags |= ISP1760_FLAG_ISP1761; - - /* Some systems wire up only 16 of the 32 data lines */ - of_property_read_u32(dp, "bus-width", &bus_width); - if (bus_width == 16) - devflags |= ISP1760_FLAG_BUS_WIDTH_16; - - if (of_property_read_bool(dp, "port1-otg")) - devflags |= ISP1760_FLAG_OTG_EN; - - if (of_property_read_bool(dp, "analog-oc")) - devflags |= ISP1760_FLAG_ANALOG_OC; - - if (of_property_read_bool(dp, "dack-polarity")) - devflags |= ISP1760_FLAG_DACK_POL_HIGH; - - if (of_property_read_bool(dp, "dreq-polarity")) - devflags |= ISP1760_FLAG_DREQ_POL_HIGH; - } else if (dev_get_platdata(&pdev->dev)) { - struct isp1760_platform_data *pdata = - dev_get_platdata(&pdev->dev); - - if (pdata->is_isp1761) - devflags |= ISP1760_FLAG_ISP1761; - if (pdata->bus_width_16) - devflags |= ISP1760_FLAG_BUS_WIDTH_16; - if (pdata->port1_otg) - devflags |= ISP1760_FLAG_OTG_EN; - if (pdata->analog_oc) - devflags |= ISP1760_FLAG_ANALOG_OC; - if (pdata->dack_polarity_high) - devflags |= ISP1760_FLAG_DACK_POL_HIGH; - if (pdata->dreq_polarity_high) - devflags |= ISP1760_FLAG_DREQ_POL_HIGH; - } - - ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev, - devflags); - if (ret < 0) - return ret; - - pr_info("ISP1760 USB device initialised\n"); - return 0; -} - -static int isp1760_plat_remove(struct platform_device *pdev) -{ - isp1760_unregister(&pdev->dev); - - return 0; -} - -#ifdef CONFIG_OF -static const struct of_device_id isp1760_of_match[] = { - { .compatible = "nxp,usb-isp1760", }, - { .compatible = "nxp,usb-isp1761", }, - { }, -}; -MODULE_DEVICE_TABLE(of, isp1760_of_match); -#endif - -static struct platform_driver isp1760_plat_driver = { - .probe = isp1760_plat_probe, - .remove = isp1760_plat_remove, - .driver = { - .name = "isp1760", - .of_match_table = of_match_ptr(isp1760_of_match), - }, -}; - -static int __init isp1760_init(void) -{ - int ret, any_ret = -ENODEV; - - isp1760_init_kmem_once(); - - ret = platform_driver_register(&isp1760_plat_driver); - if (!ret) - any_ret = 0; -#ifdef CONFIG_PCI - ret = pci_register_driver(&isp1761_pci_driver); - if (!ret) - any_ret = 0; -#endif - - if (any_ret) - isp1760_deinit_kmem_cache(); - return any_ret; -} -module_init(isp1760_init); - -static void __exit isp1760_exit(void) -{ - platform_driver_unregister(&isp1760_plat_driver); -#ifdef CONFIG_PCI - pci_unregister_driver(&isp1761_pci_driver); -#endif - isp1760_deinit_kmem_cache(); -} -module_exit(isp1760_exit); diff --git a/drivers/usb/host/isp1760-regs.h b/drivers/usb/host/isp1760-regs.h deleted file mode 100644 index b67095c9a9d4..000000000000 --- a/drivers/usb/host/isp1760-regs.h +++ /dev/null @@ -1,230 +0,0 @@ -/* - * Driver for the NXP ISP1760 chip - * - * Copyright 2014 Laurent Pinchart - * Copyright 2007 Sebastian Siewior - * - * Contacts: - * Sebastian Siewior - * Laurent Pinchart - * - * 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. - */ - -#ifndef _ISP1760_REGS_H_ -#define _ISP1760_REGS_H_ - -/* ----------------------------------------------------------------------------- - * Host Controller - */ - -/* EHCI capability registers */ -#define HC_CAPLENGTH 0x000 -#define HC_LENGTH(p) (((p) >> 00) & 0x00ff) /* bits 7:0 */ -#define HC_VERSION(p) (((p) >> 16) & 0xffff) /* bits 31:16 */ - -#define HC_HCSPARAMS 0x004 -#define HCS_INDICATOR(p) ((p) & (1 << 16)) /* true: has port indicators */ -#define HCS_PPC(p) ((p) & (1 << 4)) /* true: port power control */ -#define HCS_N_PORTS(p) (((p) >> 0) & 0xf) /* bits 3:0, ports on HC */ - -#define HC_HCCPARAMS 0x008 -#define HCC_ISOC_CACHE(p) ((p) & (1 << 7)) /* true: can cache isoc frame */ -#define HCC_ISOC_THRES(p) (((p) >> 4) & 0x7) /* bits 6:4, uframes cached */ - -/* EHCI operational registers */ -#define HC_USBCMD 0x020 -#define CMD_LRESET (1 << 7) /* partial reset (no ports, etc) */ -#define CMD_RESET (1 << 1) /* reset HC not bus */ -#define CMD_RUN (1 << 0) /* start/stop HC */ - -#define HC_USBSTS 0x024 -#define STS_PCD (1 << 2) /* port change detect */ - -#define HC_FRINDEX 0x02c - -#define HC_CONFIGFLAG 0x060 -#define FLAG_CF (1 << 0) /* true: we'll support "high speed" */ - -#define HC_PORTSC1 0x064 -#define PORT_OWNER (1 << 13) /* true: companion hc owns this port */ -#define PORT_POWER (1 << 12) /* true: has power (see PPC) */ -#define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */ -#define PORT_RESET (1 << 8) /* reset port */ -#define PORT_SUSPEND (1 << 7) /* suspend port */ -#define PORT_RESUME (1 << 6) /* resume it */ -#define PORT_PE (1 << 2) /* port enable */ -#define PORT_CSC (1 << 1) /* connect status change */ -#define PORT_CONNECT (1 << 0) /* device connected */ -#define PORT_RWC_BITS (PORT_CSC) - -#define HC_ISO_PTD_DONEMAP_REG 0x130 -#define HC_ISO_PTD_SKIPMAP_REG 0x134 -#define HC_ISO_PTD_LASTPTD_REG 0x138 -#define HC_INT_PTD_DONEMAP_REG 0x140 -#define HC_INT_PTD_SKIPMAP_REG 0x144 -#define HC_INT_PTD_LASTPTD_REG 0x148 -#define HC_ATL_PTD_DONEMAP_REG 0x150 -#define HC_ATL_PTD_SKIPMAP_REG 0x154 -#define HC_ATL_PTD_LASTPTD_REG 0x158 - -/* Configuration Register */ -#define HC_HW_MODE_CTRL 0x300 -#define ALL_ATX_RESET (1 << 31) -#define HW_ANA_DIGI_OC (1 << 15) -#define HW_DEV_DMA (1 << 11) -#define HW_COMN_IRQ (1 << 10) -#define HW_COMN_DMA (1 << 9) -#define HW_DATA_BUS_32BIT (1 << 8) -#define HW_DACK_POL_HIGH (1 << 6) -#define HW_DREQ_POL_HIGH (1 << 5) -#define HW_INTR_HIGH_ACT (1 << 2) -#define HW_INTR_EDGE_TRIG (1 << 1) -#define HW_GLOBAL_INTR_EN (1 << 0) - -#define HC_CHIP_ID_REG 0x304 -#define HC_SCRATCH_REG 0x308 - -#define HC_RESET_REG 0x30c -#define SW_RESET_RESET_HC (1 << 1) -#define SW_RESET_RESET_ALL (1 << 0) - -#define HC_BUFFER_STATUS_REG 0x334 -#define ISO_BUF_FILL (1 << 2) -#define INT_BUF_FILL (1 << 1) -#define ATL_BUF_FILL (1 << 0) - -#define HC_MEMORY_REG 0x33c -#define ISP_BANK(x) ((x) << 16) - -#define HC_PORT1_CTRL 0x374 -#define PORT1_POWER (3 << 3) -#define PORT1_INIT1 (1 << 7) -#define PORT1_INIT2 (1 << 23) -#define HW_OTG_CTRL_SET 0x374 -#define HW_OTG_CTRL_CLR 0x376 -#define HW_OTG_DISABLE (1 << 10) -#define HW_OTG_SE0_EN (1 << 9) -#define HW_BDIS_ACON_EN (1 << 8) -#define HW_SW_SEL_HC_DC (1 << 7) -#define HW_VBUS_CHRG (1 << 6) -#define HW_VBUS_DISCHRG (1 << 5) -#define HW_VBUS_DRV (1 << 4) -#define HW_SEL_CP_EXT (1 << 3) -#define HW_DM_PULLDOWN (1 << 2) -#define HW_DP_PULLDOWN (1 << 1) -#define HW_DP_PULLUP (1 << 0) - -/* Interrupt Register */ -#define HC_INTERRUPT_REG 0x310 - -#define HC_INTERRUPT_ENABLE 0x314 -#define HC_ISO_INT (1 << 9) -#define HC_ATL_INT (1 << 8) -#define HC_INTL_INT (1 << 7) -#define HC_EOT_INT (1 << 3) -#define HC_SOT_INT (1 << 1) -#define INTERRUPT_ENABLE_MASK (HC_INTL_INT | HC_ATL_INT) - -#define HC_ISO_IRQ_MASK_OR_REG 0x318 -#define HC_INT_IRQ_MASK_OR_REG 0x31c -#define HC_ATL_IRQ_MASK_OR_REG 0x320 -#define HC_ISO_IRQ_MASK_AND_REG 0x324 -#define HC_INT_IRQ_MASK_AND_REG 0x328 -#define HC_ATL_IRQ_MASK_AND_REG 0x32c - -/* ----------------------------------------------------------------------------- - * Peripheral Controller - */ - -/* Initialization Registers */ -#define DC_ADDRESS 0x0200 -#define DC_DEVEN (1 << 7) - -#define DC_MODE 0x020c -#define DC_DMACLKON (1 << 9) -#define DC_VBUSSTAT (1 << 8) -#define DC_CLKAON (1 << 7) -#define DC_SNDRSU (1 << 6) -#define DC_GOSUSP (1 << 5) -#define DC_SFRESET (1 << 4) -#define DC_GLINTENA (1 << 3) -#define DC_WKUPCS (1 << 2) - -#define DC_INTCONF 0x0210 -#define DC_CDBGMOD_ACK_NAK (0 << 6) -#define DC_CDBGMOD_ACK (1 << 6) -#define DC_CDBGMOD_ACK_1NAK (2 << 6) -#define DC_DDBGMODIN_ACK_NAK (0 << 4) -#define DC_DDBGMODIN_ACK (1 << 4) -#define DC_DDBGMODIN_ACK_1NAK (2 << 4) -#define DC_DDBGMODOUT_ACK_NYET_NAK (0 << 2) -#define DC_DDBGMODOUT_ACK_NYET (1 << 2) -#define DC_DDBGMODOUT_ACK_NYET_1NAK (2 << 2) -#define DC_INTLVL (1 << 1) -#define DC_INTPOL (1 << 0) - -#define DC_DEBUG 0x0212 -#define DC_INTENABLE 0x0214 -#define DC_IEPTX(n) (1 << (11 + 2 * (n))) -#define DC_IEPRX(n) (1 << (10 + 2 * (n))) -#define DC_IEPRXTX(n) (3 << (10 + 2 * (n))) -#define DC_IEP0SETUP (1 << 8) -#define DC_IEVBUS (1 << 7) -#define DC_IEDMA (1 << 6) -#define DC_IEHS_STA (1 << 5) -#define DC_IERESM (1 << 4) -#define DC_IESUSP (1 << 3) -#define DC_IEPSOF (1 << 2) -#define DC_IESOF (1 << 1) -#define DC_IEBRST (1 << 0) - -/* Data Flow Registers */ -#define DC_EPINDEX 0x022c -#define DC_EP0SETUP (1 << 5) -#define DC_ENDPIDX(n) ((n) << 1) -#define DC_EPDIR (1 << 0) - -#define DC_CTRLFUNC 0x0228 -#define DC_CLBUF (1 << 4) -#define DC_VENDP (1 << 3) -#define DC_DSEN (1 << 2) -#define DC_STATUS (1 << 1) -#define DC_STALL (1 << 0) - -#define DC_DATAPORT 0x0220 -#define DC_BUFLEN 0x021c -#define DC_DATACOUNT_MASK 0xffff -#define DC_BUFSTAT 0x021e -#define DC_EPMAXPKTSZ 0x0204 - -#define DC_EPTYPE 0x0208 -#define DC_NOEMPKT (1 << 4) -#define DC_EPENABLE (1 << 3) -#define DC_DBLBUF (1 << 2) -#define DC_ENDPTYP_ISOC (1 << 0) -#define DC_ENDPTYP_BULK (2 << 0) -#define DC_ENDPTYP_INTERRUPT (3 << 0) - -/* DMA Registers */ -#define DC_DMACMD 0x0230 -#define DC_DMATXCOUNT 0x0234 -#define DC_DMACONF 0x0238 -#define DC_DMAHW 0x023c -#define DC_DMAINTREASON 0x0250 -#define DC_DMAINTEN 0x0254 -#define DC_DMAEP 0x0258 -#define DC_DMABURSTCOUNT 0x0264 - -/* General Registers */ -#define DC_INTERRUPT 0x0218 -#define DC_CHIPID 0x0270 -#define DC_FRAMENUM 0x0274 -#define DC_SCRATCH 0x0278 -#define DC_UNLOCKDEV 0x027c -#define DC_INTPULSEWIDTH 0x0280 -#define DC_TESTMODE 0x0284 - -#endif diff --git a/drivers/usb/host/isp1760-udc.c b/drivers/usb/host/isp1760-udc.c deleted file mode 100644 index 6bfda3082807..000000000000 --- a/drivers/usb/host/isp1760-udc.c +++ /dev/null @@ -1,1495 +0,0 @@ -/* - * Driver for the NXP ISP1761 device controller - * - * Copyright 2014 Ideas on Board Oy - * - * Contacts: - * Laurent Pinchart - * - * 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 -#include -#include -#include -#include -#include -#include -#include - -#include "isp1760-core.h" -#include "isp1760-regs.h" -#include "isp1760-udc.h" - -#define ISP1760_VBUS_POLL_INTERVAL msecs_to_jiffies(500) - -struct isp1760_request { - struct usb_request req; - struct list_head queue; - struct isp1760_ep *ep; - unsigned int packet_size; -}; - -static inline struct isp1760_udc *gadget_to_udc(struct usb_gadget *gadget) -{ - return container_of(gadget, struct isp1760_udc, gadget); -} - -static inline struct isp1760_ep *ep_to_udc_ep(struct usb_ep *ep) -{ - return container_of(ep, struct isp1760_ep, ep); -} - -static inline struct isp1760_request *req_to_udc_req(struct usb_request *req) -{ - return container_of(req, struct isp1760_request, req); -} - -static inline u32 isp1760_udc_read(struct isp1760_udc *udc, u16 reg) -{ - return isp1760_read32(udc->regs, reg); -} - -static inline void isp1760_udc_write(struct isp1760_udc *udc, u16 reg, u32 val) -{ - isp1760_write32(udc->regs, reg, val); -} - -/* ----------------------------------------------------------------------------- - * Endpoint Management - */ - -static struct isp1760_ep *isp1760_udc_find_ep(struct isp1760_udc *udc, - u16 index) -{ - unsigned int i; - - if (index == 0) - return &udc->ep[0]; - - for (i = 1; i < ARRAY_SIZE(udc->ep); ++i) { - if (udc->ep[i].addr == index) - return udc->ep[i].desc ? &udc->ep[i] : NULL; - } - - return NULL; -} - -static void __isp1760_udc_select_ep(struct isp1760_ep *ep, int dir) -{ - isp1760_udc_write(ep->udc, DC_EPINDEX, - DC_ENDPIDX(ep->addr & USB_ENDPOINT_NUMBER_MASK) | - (dir == USB_DIR_IN ? DC_EPDIR : 0)); -} - -/** - * isp1760_udc_select_ep - Select an endpoint for register access - * @ep: The endpoint - * - * The ISP1761 endpoint registers are banked. This function selects the target - * endpoint for banked register access. The selection remains valid until the - * next call to this function, the next direct access to the EPINDEX register - * or the next reset, whichever comes first. - * - * Called with the UDC spinlock held. - */ -static void isp1760_udc_select_ep(struct isp1760_ep *ep) -{ - __isp1760_udc_select_ep(ep, ep->addr & USB_ENDPOINT_DIR_MASK); -} - -/* Called with the UDC spinlock held. */ -static void isp1760_udc_ctrl_send_status(struct isp1760_ep *ep, int dir) -{ - struct isp1760_udc *udc = ep->udc; - - /* - * Proceed to the status stage. The status stage data packet flows in - * the direction opposite to the data stage data packets, we thus need - * to select the OUT/IN endpoint for IN/OUT transfers. - */ - isp1760_udc_write(udc, DC_EPINDEX, DC_ENDPIDX(0) | - (dir == USB_DIR_IN ? 0 : DC_EPDIR)); - isp1760_udc_write(udc, DC_CTRLFUNC, DC_STATUS); - - /* - * The hardware will terminate the request automatically and go back to - * the setup stage without notifying us. - */ - udc->ep0_state = ISP1760_CTRL_SETUP; -} - -/* Called without the UDC spinlock held. */ -static void isp1760_udc_request_complete(struct isp1760_ep *ep, - struct isp1760_request *req, - int status) -{ - struct isp1760_udc *udc = ep->udc; - unsigned long flags; - - dev_dbg(ep->udc->isp->dev, "completing request %p with status %d\n", - req, status); - - req->ep = NULL; - req->req.status = status; - req->req.complete(&ep->ep, &req->req); - - spin_lock_irqsave(&udc->lock, flags); - - /* - * When completing control OUT requests, move to the status stage after - * calling the request complete callback. This gives the gadget an - * opportunity to stall the control transfer if needed. - */ - if (status == 0 && ep->addr == 0 && udc->ep0_dir == USB_DIR_OUT) - isp1760_udc_ctrl_send_status(ep, USB_DIR_OUT); - - spin_unlock_irqrestore(&udc->lock, flags); -} - -static void isp1760_udc_ctrl_send_stall(struct isp1760_ep *ep) -{ - struct isp1760_udc *udc = ep->udc; - unsigned long flags; - - dev_dbg(ep->udc->isp->dev, "%s(ep%02x)\n", __func__, ep->addr); - - spin_lock_irqsave(&udc->lock, flags); - - /* Stall both the IN and OUT endpoints. */ - __isp1760_udc_select_ep(ep, USB_DIR_OUT); - isp1760_udc_write(udc, DC_CTRLFUNC, DC_STALL); - __isp1760_udc_select_ep(ep, USB_DIR_IN); - isp1760_udc_write(udc, DC_CTRLFUNC, DC_STALL); - - /* A protocol stall completes the control transaction. */ - udc->ep0_state = ISP1760_CTRL_SETUP; - - spin_unlock_irqrestore(&udc->lock, flags); -} - -/* ----------------------------------------------------------------------------- - * Data Endpoints - */ - -/* Called with the UDC spinlock held. */ -static bool isp1760_udc_receive(struct isp1760_ep *ep, - struct isp1760_request *req) -{ - struct isp1760_udc *udc = ep->udc; - unsigned int len; - u32 *buf; - int i; - - isp1760_udc_select_ep(ep); - len = isp1760_udc_read(udc, DC_BUFLEN) & DC_DATACOUNT_MASK; - - dev_dbg(udc->isp->dev, "%s: received %u bytes (%u/%u done)\n", - __func__, len, req->req.actual, req->req.length); - - len = min(len, req->req.length - req->req.actual); - - if (!len) { - /* - * There's no data to be read from the FIFO, acknowledge the RX - * interrupt by clearing the buffer. - * - * TODO: What if another packet arrives in the meantime ? The - * datasheet doesn't clearly document how this should be - * handled. - */ - isp1760_udc_write(udc, DC_CTRLFUNC, DC_CLBUF); - return false; - } - - buf = req->req.buf + req->req.actual; - - /* - * Make sure not to read more than one extra byte, otherwise data from - * the next packet might be removed from the FIFO. - */ - for (i = len; i > 2; i -= 4, ++buf) - *buf = le32_to_cpu(isp1760_udc_read(udc, DC_DATAPORT)); - if (i > 0) - *(u16 *)buf = le16_to_cpu(readw(udc->regs + DC_DATAPORT)); - - req->req.actual += len; - - /* - * TODO: The short_not_ok flag isn't supported yet, but isn't used by - * any gadget driver either. - */ - - dev_dbg(udc->isp->dev, - "%s: req %p actual/length %u/%u maxpacket %u packet size %u\n", - __func__, req, req->req.actual, req->req.length, ep->maxpacket, - len); - - ep->rx_pending = false; - - /* - * Complete the request if all data has been received or if a short - * packet has been received. - */ - if (req->req.actual == req->req.length || len < ep->maxpacket) { - list_del(&req->queue); - return true; - } - - return false; -} - -static void isp1760_udc_transmit(struct isp1760_ep *ep, - struct isp1760_request *req) -{ - struct isp1760_udc *udc = ep->udc; - u32 *buf = req->req.buf + req->req.actual; - int i; - - req->packet_size = min(req->req.length - req->req.actual, - ep->maxpacket); - - dev_dbg(udc->isp->dev, "%s: transferring %u bytes (%u/%u done)\n", - __func__, req->packet_size, req->req.actual, - req->req.length); - - __isp1760_udc_select_ep(ep, USB_DIR_IN); - - if (req->packet_size) - isp1760_udc_write(udc, DC_BUFLEN, req->packet_size); - - /* - * Make sure not to write more than one extra byte, otherwise extra data - * will stay in the FIFO and will be transmitted during the next control - * request. The endpoint control CLBUF bit is supposed to allow flushing - * the FIFO for this kind of conditions, but doesn't seem to work. - */ - for (i = req->packet_size; i > 2; i -= 4, ++buf) - isp1760_udc_write(udc, DC_DATAPORT, cpu_to_le32(*buf)); - if (i > 0) - writew(cpu_to_le16(*(u16 *)buf), udc->regs + DC_DATAPORT); - - if (ep->addr == 0) - isp1760_udc_write(udc, DC_CTRLFUNC, DC_DSEN); - if (!req->packet_size) - isp1760_udc_write(udc, DC_CTRLFUNC, DC_VENDP); -} - -static void isp1760_ep_rx_ready(struct isp1760_ep *ep) -{ - struct isp1760_udc *udc = ep->udc; - struct isp1760_request *req; - bool complete; - - spin_lock(&udc->lock); - - if (ep->addr == 0 && udc->ep0_state != ISP1760_CTRL_DATA_OUT) { - spin_unlock(&udc->lock); - dev_dbg(udc->isp->dev, "%s: invalid ep0 state %u\n", __func__, - udc->ep0_state); - return; - } - - if (ep->addr != 0 && !ep->desc) { - spin_unlock(&udc->lock); - dev_dbg(udc->isp->dev, "%s: ep%02x is disabled\n", __func__, - ep->addr); - return; - } - - if (list_empty(&ep->queue)) { - ep->rx_pending = true; - spin_unlock(&udc->lock); - dev_dbg(udc->isp->dev, "%s: ep%02x (%p) has no request queued\n", - __func__, ep->addr, ep); - return; - } - - req = list_first_entry(&ep->queue, struct isp1760_request, - queue); - complete = isp1760_udc_receive(ep, req); - - spin_unlock(&udc->lock); - - if (complete) - isp1760_udc_request_complete(ep, req, 0); -} - -static void isp1760_ep_tx_complete(struct isp1760_ep *ep) -{ - struct isp1760_udc *udc = ep->udc; - struct isp1760_request *complete = NULL; - struct isp1760_request *req; - bool need_zlp; - - spin_lock(&udc->lock); - - if (ep->addr == 0 && udc->ep0_state != ISP1760_CTRL_DATA_IN) { - spin_unlock(&udc->lock); - dev_dbg(udc->isp->dev, "TX IRQ: invalid endpoint state %u\n", - udc->ep0_state); - return; - } - - if (list_empty(&ep->queue)) { - /* - * This can happen for the control endpoint when the reply to - * the GET_STATUS IN control request is sent directly by the - * setup IRQ handler. Just proceed to the status stage. - */ - if (ep->addr == 0) { - isp1760_udc_ctrl_send_status(ep, USB_DIR_IN); - spin_unlock(&udc->lock); - return; - } - - spin_unlock(&udc->lock); - dev_dbg(udc->isp->dev, "%s: ep%02x has no request queued\n", - __func__, ep->addr); - return; - } - - req = list_first_entry(&ep->queue, struct isp1760_request, - queue); - req->req.actual += req->packet_size; - - need_zlp = req->req.actual == req->req.length && - !(req->req.length % ep->maxpacket) && - req->packet_size && req->req.zero; - - dev_dbg(udc->isp->dev, - "TX IRQ: req %p actual/length %u/%u maxpacket %u packet size %u zero %u need zlp %u\n", - req, req->req.actual, req->req.length, ep->maxpacket, - req->packet_size, req->req.zero, need_zlp); - - /* - * Complete the request if all data has been sent and we don't need to - * transmit a zero length packet. - */ - if (req->req.actual == req->req.length && !need_zlp) { - complete = req; - list_del(&req->queue); - - if (ep->addr == 0) - isp1760_udc_ctrl_send_status(ep, USB_DIR_IN); - - if (!list_empty(&ep->queue)) - req = list_first_entry(&ep->queue, - struct isp1760_request, queue); - else - req = NULL; - } - - /* - * Transmit the next packet or start the next request, if any. - * - * TODO: If the endpoint is stalled the next request shouldn't be - * started, but what about the next packet ? - */ - if (req) - isp1760_udc_transmit(ep, req); - - spin_unlock(&udc->lock); - - if (complete) - isp1760_udc_request_complete(ep, complete, 0); -} - -static int __isp1760_udc_set_halt(struct isp1760_ep *ep, bool halt) -{ - struct isp1760_udc *udc = ep->udc; - - dev_dbg(udc->isp->dev, "%s: %s halt on ep%02x\n", __func__, - halt ? "set" : "clear", ep->addr); - - if (ep->desc && usb_endpoint_xfer_isoc(ep->desc)) { - dev_dbg(udc->isp->dev, "%s: ep%02x is isochronous\n", __func__, - ep->addr); - return -EINVAL; - } - - isp1760_udc_select_ep(ep); - isp1760_udc_write(udc, DC_CTRLFUNC, halt ? DC_STALL : 0); - - if (ep->addr == 0) { - /* When halting the control endpoint, stall both IN and OUT. */ - __isp1760_udc_select_ep(ep, USB_DIR_IN); - isp1760_udc_write(udc, DC_CTRLFUNC, halt ? DC_STALL : 0); - } else if (!halt) { - /* Reset the data PID by cycling the endpoint enable bit. */ - u16 eptype = isp1760_udc_read(udc, DC_EPTYPE); - - isp1760_udc_write(udc, DC_EPTYPE, eptype & ~DC_EPENABLE); - isp1760_udc_write(udc, DC_EPTYPE, eptype); - - /* - * Disabling the endpoint emptied the transmit FIFO, fill it - * again if a request is pending. - * - * TODO: Does the gadget framework require synchronizatino with - * the TX IRQ handler ? - */ - if ((ep->addr & USB_DIR_IN) && !list_empty(&ep->queue)) { - struct isp1760_request *req; - - req = list_first_entry(&ep->queue, - struct isp1760_request, queue); - isp1760_udc_transmit(ep, req); - } - } - - ep->halted = halt; - - return 0; -} - -/* ----------------------------------------------------------------------------- - * Control Endpoint - */ - -static int isp1760_udc_get_status(struct isp1760_udc *udc, - const struct usb_ctrlrequest *req) -{ - struct isp1760_ep *ep; - u16 status; - - if (req->wLength != cpu_to_le16(2) || req->wValue != cpu_to_le16(0)) - return -EINVAL; - - switch (req->bRequestType) { - case USB_DIR_IN | USB_RECIP_DEVICE: - status = udc->devstatus; - break; - - case USB_DIR_IN | USB_RECIP_INTERFACE: - status = 0; - break; - - case USB_DIR_IN | USB_RECIP_ENDPOINT: - ep = isp1760_udc_find_ep(udc, le16_to_cpu(req->wIndex)); - if (!ep) - return -EINVAL; - - status = 0; - if (ep->halted) - status |= 1 << USB_ENDPOINT_HALT; - break; - - default: - return -EINVAL; - } - - isp1760_udc_write(udc, DC_EPINDEX, DC_ENDPIDX(0) | DC_EPDIR); - isp1760_udc_write(udc, DC_BUFLEN, 2); - - writew(cpu_to_le16(status), udc->regs + DC_DATAPORT); - - isp1760_udc_write(udc, DC_CTRLFUNC, DC_DSEN); - - dev_dbg(udc->isp->dev, "%s: status 0x%04x\n", __func__, status); - - return 0; -} - -static int isp1760_udc_set_address(struct isp1760_udc *udc, u16 addr) -{ - if (addr > 127) { - dev_dbg(udc->isp->dev, "invalid device address %u\n", addr); - return -EINVAL; - } - - if (udc->gadget.state != USB_STATE_DEFAULT && - udc->gadget.state != USB_STATE_ADDRESS) { - dev_dbg(udc->isp->dev, "can't set address in state %u\n", - udc->gadget.state); - return -EINVAL; - } - - usb_gadget_set_state(&udc->gadget, addr ? USB_STATE_ADDRESS : - USB_STATE_DEFAULT); - - isp1760_udc_write(udc, DC_ADDRESS, DC_DEVEN | addr); - - spin_lock(&udc->lock); - isp1760_udc_ctrl_send_status(&udc->ep[0], USB_DIR_OUT); - spin_unlock(&udc->lock); - - return 0; -} - -static bool isp1760_ep0_setup_standard(struct isp1760_udc *udc, - struct usb_ctrlrequest *req) -{ - bool stall; - - switch (req->bRequest) { - case USB_REQ_GET_STATUS: - return isp1760_udc_get_status(udc, req); - - case USB_REQ_CLEAR_FEATURE: - switch (req->bRequestType) { - case USB_DIR_OUT | USB_RECIP_DEVICE: { - /* TODO: Handle remote wakeup feature. */ - return true; - } - - case USB_DIR_OUT | USB_RECIP_ENDPOINT: { - u16 index = le16_to_cpu(req->wIndex); - struct isp1760_ep *ep; - - if (req->wLength != cpu_to_le16(0) || - req->wValue != cpu_to_le16(USB_ENDPOINT_HALT)) - return true; - - ep = isp1760_udc_find_ep(udc, index); - if (!ep) - return true; - - spin_lock(&udc->lock); - - /* - * If the endpoint is wedged only the gadget can clear - * the halt feature. Pretend success in that case, but - * keep the endpoint halted. - */ - if (!ep->wedged) - stall = __isp1760_udc_set_halt(ep, false); - else - stall = false; - - if (!stall) - isp1760_udc_ctrl_send_status(&udc->ep[0], - USB_DIR_OUT); - - spin_unlock(&udc->lock); - return stall; - } - - default: - return true; - } - break; - - case USB_REQ_SET_FEATURE: - switch (req->bRequestType) { - case USB_DIR_OUT | USB_RECIP_DEVICE: { - /* TODO: Handle remote wakeup and test mode features */ - return true; - } - - case USB_DIR_OUT | USB_RECIP_ENDPOINT: { - u16 index = le16_to_cpu(req->wIndex); - struct isp1760_ep *ep; - - if (req->wLength != cpu_to_le16(0) || - req->wValue != cpu_to_le16(USB_ENDPOINT_HALT)) - return true; - - ep = isp1760_udc_find_ep(udc, index); - if (!ep) - return true; - - spin_lock(&udc->lock); - - stall = __isp1760_udc_set_halt(ep, true); - if (!stall) - isp1760_udc_ctrl_send_status(&udc->ep[0], - USB_DIR_OUT); - - spin_unlock(&udc->lock); - return stall; - } - - default: - return true; - } - break; - - case USB_REQ_SET_ADDRESS: - if (req->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE)) - return true; - - return isp1760_udc_set_address(udc, le16_to_cpu(req->wValue)); - - case USB_REQ_SET_CONFIGURATION: - if (req->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE)) - return true; - - if (udc->gadget.state != USB_STATE_ADDRESS && - udc->gadget.state != USB_STATE_CONFIGURED) - return true; - - stall = udc->driver->setup(&udc->gadget, req) < 0; - if (stall) - return true; - - usb_gadget_set_state(&udc->gadget, req->wValue ? - USB_STATE_CONFIGURED : USB_STATE_ADDRESS); - - /* - * SET_CONFIGURATION (and SET_INTERFACE) must reset the halt - * feature on all endpoints. There is however no need to do so - * explicitly here as the gadget driver will disable and - * reenable endpoints, clearing the halt feature. - */ - return false; - - default: - return udc->driver->setup(&udc->gadget, req) < 0; - } -} - -static void isp1760_ep0_setup(struct isp1760_udc *udc) -{ - union { - struct usb_ctrlrequest r; - u32 data[2]; - } req; - unsigned int count; - bool stall = false; - - spin_lock(&udc->lock); - - isp1760_udc_write(udc, DC_EPINDEX, DC_EP0SETUP); - - count = isp1760_udc_read(udc, DC_BUFLEN) & DC_DATACOUNT_MASK; - if (count != sizeof(req)) { - spin_unlock(&udc->lock); - - dev_err(udc->isp->dev, "invalid length %u for setup packet\n", - count); - - isp1760_udc_ctrl_send_stall(&udc->ep[0]); - return; - } - - req.data[0] = isp1760_udc_read(udc, DC_DATAPORT); - req.data[1] = isp1760_udc_read(udc, DC_DATAPORT); - - if (udc->ep0_state != ISP1760_CTRL_SETUP) { - spin_unlock(&udc->lock); - dev_dbg(udc->isp->dev, "unexpected SETUP packet\n"); - return; - } - - /* Move to the data stage. */ - if (!req.r.wLength) - udc->ep0_state = ISP1760_CTRL_STATUS; - else if (req.r.bRequestType & USB_DIR_IN) - udc->ep0_state = ISP1760_CTRL_DATA_IN; - else - udc->ep0_state = ISP1760_CTRL_DATA_OUT; - - udc->ep0_dir = req.r.bRequestType & USB_DIR_IN; - udc->ep0_length = le16_to_cpu(req.r.wLength); - - spin_unlock(&udc->lock); - - dev_dbg(udc->isp->dev, - "%s: bRequestType 0x%02x bRequest 0x%02x wValue 0x%04x wIndex 0x%04x wLength 0x%04x\n", - __func__, req.r.bRequestType, req.r.bRequest, - le16_to_cpu(req.r.wValue), le16_to_cpu(req.r.wIndex), - le16_to_cpu(req.r.wLength)); - - if ((req.r.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) - stall = isp1760_ep0_setup_standard(udc, &req.r); - else - stall = udc->driver->setup(&udc->gadget, &req.r) < 0; - - if (stall) - isp1760_udc_ctrl_send_stall(&udc->ep[0]); -} - -/* ----------------------------------------------------------------------------- - * Gadget Endpoint Operations - */ - -static int isp1760_ep_enable(struct usb_ep *ep, - const struct usb_endpoint_descriptor *desc) -{ - struct isp1760_ep *uep = ep_to_udc_ep(ep); - struct isp1760_udc *udc = uep->udc; - unsigned long flags; - unsigned int type; - - dev_dbg(uep->udc->isp->dev, "%s\n", __func__); - - /* - * Validate the descriptor. The control endpoint can't be enabled - * manually. - */ - if (desc->bDescriptorType != USB_DT_ENDPOINT || - desc->bEndpointAddress == 0 || - desc->bEndpointAddress != uep->addr || - le16_to_cpu(desc->wMaxPacketSize) > ep->maxpacket) { - dev_dbg(udc->isp->dev, - "%s: invalid descriptor type %u addr %02x ep addr %02x max packet size %u/%u\n", - __func__, desc->bDescriptorType, - desc->bEndpointAddress, uep->addr, - le16_to_cpu(desc->wMaxPacketSize), ep->maxpacket); - return -EINVAL; - } - - switch (usb_endpoint_type(desc)) { - case USB_ENDPOINT_XFER_ISOC: - type = DC_ENDPTYP_ISOC; - break; - case USB_ENDPOINT_XFER_BULK: - type = DC_ENDPTYP_BULK; - break; - case USB_ENDPOINT_XFER_INT: - type = DC_ENDPTYP_INTERRUPT; - break; - case USB_ENDPOINT_XFER_CONTROL: - default: - dev_dbg(udc->isp->dev, "%s: control endpoints unsupported\n", - __func__); - return -EINVAL; - } - - spin_lock_irqsave(&udc->lock, flags); - - uep->desc = desc; - uep->maxpacket = le16_to_cpu(desc->wMaxPacketSize); - uep->rx_pending = false; - uep->halted = false; - uep->wedged = false; - - isp1760_udc_select_ep(uep); - isp1760_udc_write(udc, DC_EPMAXPKTSZ, uep->maxpacket); - isp1760_udc_write(udc, DC_BUFLEN, uep->maxpacket); - isp1760_udc_write(udc, DC_EPTYPE, DC_EPENABLE | type); - - spin_unlock_irqrestore(&udc->lock, flags); - - return 0; -} - -static int isp1760_ep_disable(struct usb_ep *ep) -{ - struct isp1760_ep *uep = ep_to_udc_ep(ep); - struct isp1760_udc *udc = uep->udc; - struct isp1760_request *req, *nreq; - LIST_HEAD(req_list); - unsigned long flags; - - dev_dbg(udc->isp->dev, "%s\n", __func__); - - spin_lock_irqsave(&udc->lock, flags); - - if (!uep->desc) { - dev_dbg(udc->isp->dev, "%s: endpoint not enabled\n", __func__); - spin_unlock_irqrestore(&udc->lock, flags); - return -EINVAL; - } - - uep->desc = NULL; - uep->maxpacket = 0; - - isp1760_udc_select_ep(uep); - isp1760_udc_write(udc, DC_EPTYPE, 0); - - /* TODO Synchronize with the IRQ handler */ - - list_splice_init(&uep->queue, &req_list); - - spin_unlock_irqrestore(&udc->lock, flags); - - list_for_each_entry_safe(req, nreq, &req_list, queue) { - list_del(&req->queue); - isp1760_udc_request_complete(uep, req, -ESHUTDOWN); - } - - return 0; -} - -static struct usb_request *isp1760_ep_alloc_request(struct usb_ep *ep, - gfp_t gfp_flags) -{ - struct isp1760_request *req; - - req = kzalloc(sizeof(*req), gfp_flags); - - return &req->req; -} - -static void isp1760_ep_free_request(struct usb_ep *ep, struct usb_request *_req) -{ - struct isp1760_request *req = req_to_udc_req(_req); - - kfree(req); -} - -static int isp1760_ep_queue(struct usb_ep *ep, struct usb_request *_req, - gfp_t gfp_flags) -{ - struct isp1760_request *req = req_to_udc_req(_req); - struct isp1760_ep *uep = ep_to_udc_ep(ep); - struct isp1760_udc *udc = uep->udc; - bool complete = false; - unsigned long flags; - int ret = 0; - - _req->status = -EINPROGRESS; - _req->actual = 0; - - spin_lock_irqsave(&udc->lock, flags); - - dev_dbg(udc->isp->dev, - "%s: req %p (%u bytes%s) ep %p(0x%02x)\n", __func__, _req, - _req->length, _req->zero ? " (zlp)" : "", uep, uep->addr); - - req->ep = uep; - - if (uep->addr == 0) { - if (_req->length != udc->ep0_length && - udc->ep0_state != ISP1760_CTRL_DATA_IN) { - dev_dbg(udc->isp->dev, - "%s: invalid length %u for req %p\n", - __func__, _req->length, req); - ret = -EINVAL; - goto done; - } - - switch (udc->ep0_state) { - case ISP1760_CTRL_DATA_IN: - dev_dbg(udc->isp->dev, "%s: transmitting req %p\n", - __func__, req); - - list_add_tail(&req->queue, &uep->queue); - isp1760_udc_transmit(uep, req); - break; - - case ISP1760_CTRL_DATA_OUT: - list_add_tail(&req->queue, &uep->queue); - __isp1760_udc_select_ep(uep, USB_DIR_OUT); - isp1760_udc_write(udc, DC_CTRLFUNC, DC_DSEN); - break; - - case ISP1760_CTRL_STATUS: - complete = true; - break; - - default: - dev_dbg(udc->isp->dev, "%s: invalid ep0 state\n", - __func__); - ret = -EINVAL; - break; - } - } else if (uep->desc) { - bool empty = list_empty(&uep->queue); - - list_add_tail(&req->queue, &uep->queue); - if ((uep->addr & USB_DIR_IN) && !uep->halted && empty) - isp1760_udc_transmit(uep, req); - else if (!(uep->addr & USB_DIR_IN) && uep->rx_pending) - complete = isp1760_udc_receive(uep, req); - } else { - dev_dbg(udc->isp->dev, - "%s: can't queue request to disabled ep%02x\n", - __func__, uep->addr); - ret = -ESHUTDOWN; - } - -done: - if (ret < 0) - req->ep = NULL; - - spin_unlock_irqrestore(&udc->lock, flags); - - if (complete) - isp1760_udc_request_complete(uep, req, 0); - - return ret; -} - -static int isp1760_ep_dequeue(struct usb_ep *ep, struct usb_request *_req) -{ - struct isp1760_request *req = req_to_udc_req(_req); - struct isp1760_ep *uep = ep_to_udc_ep(ep); - struct isp1760_udc *udc = uep->udc; - unsigned long flags; - - dev_dbg(uep->udc->isp->dev, "%s(ep%02x)\n", __func__, uep->addr); - - spin_lock_irqsave(&udc->lock, flags); - - if (req->ep != uep) - req = NULL; - else - list_del(&req->queue); - - spin_unlock_irqrestore(&udc->lock, flags); - - if (!req) - return -EINVAL; - - isp1760_udc_request_complete(uep, req, -ECONNRESET); - return 0; -} - -static int __isp1760_ep_set_halt(struct isp1760_ep *uep, bool stall, bool wedge) -{ - struct isp1760_udc *udc = uep->udc; - int ret; - - if (!uep->addr) { - /* - * Halting the control endpoint is only valid as a delayed error - * response to a SETUP packet. Make sure EP0 is in the right - * stage and that the gadget isn't trying to clear the halt - * condition. - */ - if (WARN_ON(udc->ep0_state == ISP1760_CTRL_SETUP || !stall || - wedge)) { - return -EINVAL; - } - } - - if (uep->addr && !uep->desc) { - dev_dbg(udc->isp->dev, "%s: ep%02x is disabled\n", __func__, - uep->addr); - return -EINVAL; - } - - if (uep->addr & USB_DIR_IN) { - /* Refuse to halt IN endpoints with active transfers. */ - if (!list_empty(&uep->queue)) { - dev_dbg(udc->isp->dev, - "%s: ep%02x has request pending\n", __func__, - uep->addr); - return -EAGAIN; - } - } - - ret = __isp1760_udc_set_halt(uep, stall); - if (ret < 0) - return ret; - - if (!uep->addr) { - /* - * Stalling EP0 completes the control transaction, move back to - * the SETUP state. - */ - udc->ep0_state = ISP1760_CTRL_SETUP; - return 0; - } - - if (wedge) - uep->wedged = true; - else if (!stall) - uep->wedged = false; - - return 0; -} - -static int isp1760_ep_set_halt(struct usb_ep *ep, int value) -{ - struct isp1760_ep *uep = ep_to_udc_ep(ep); - unsigned long flags; - int ret; - - dev_dbg(uep->udc->isp->dev, "%s: %s halt on ep%02x\n", __func__, - value ? "set" : "clear", uep->addr); - - spin_lock_irqsave(&uep->udc->lock, flags); - ret = __isp1760_ep_set_halt(uep, value, false); - spin_unlock_irqrestore(&uep->udc->lock, flags); - - return ret; -} - -static int isp1760_ep_set_wedge(struct usb_ep *ep) -{ - struct isp1760_ep *uep = ep_to_udc_ep(ep); - unsigned long flags; - int ret; - - dev_dbg(uep->udc->isp->dev, "%s: set wedge on ep%02x)\n", __func__, - uep->addr); - - spin_lock_irqsave(&uep->udc->lock, flags); - ret = __isp1760_ep_set_halt(uep, true, true); - spin_unlock_irqrestore(&uep->udc->lock, flags); - - return ret; -} - -static void isp1760_ep_fifo_flush(struct usb_ep *ep) -{ - struct isp1760_ep *uep = ep_to_udc_ep(ep); - struct isp1760_udc *udc = uep->udc; - unsigned long flags; - - spin_lock_irqsave(&udc->lock, flags); - - isp1760_udc_select_ep(uep); - - /* - * Set the CLBUF bit twice to flush both buffers in case double - * buffering is enabled. - */ - isp1760_udc_write(udc, DC_CTRLFUNC, DC_CLBUF); - isp1760_udc_write(udc, DC_CTRLFUNC, DC_CLBUF); - - spin_unlock_irqrestore(&udc->lock, flags); -} - -static const struct usb_ep_ops isp1760_ep_ops = { - .enable = isp1760_ep_enable, - .disable = isp1760_ep_disable, - .alloc_request = isp1760_ep_alloc_request, - .free_request = isp1760_ep_free_request, - .queue = isp1760_ep_queue, - .dequeue = isp1760_ep_dequeue, - .set_halt = isp1760_ep_set_halt, - .set_wedge = isp1760_ep_set_wedge, - .fifo_flush = isp1760_ep_fifo_flush, -}; - -/* ----------------------------------------------------------------------------- - * Device States - */ - -/* Called with the UDC spinlock held. */ -static void isp1760_udc_connect(struct isp1760_udc *udc) -{ - usb_gadget_set_state(&udc->gadget, USB_STATE_POWERED); - mod_timer(&udc->vbus_timer, jiffies + ISP1760_VBUS_POLL_INTERVAL); -} - -/* Called with the UDC spinlock held. */ -static void isp1760_udc_disconnect(struct isp1760_udc *udc) -{ - if (udc->gadget.state < USB_STATE_POWERED) - return; - - dev_dbg(udc->isp->dev, "Device disconnected in state %u\n", - udc->gadget.state); - - udc->gadget.speed = USB_SPEED_UNKNOWN; - usb_gadget_set_state(&udc->gadget, USB_STATE_ATTACHED); - - if (udc->driver->disconnect) - udc->driver->disconnect(&udc->gadget); - - del_timer(&udc->vbus_timer); - - /* TODO Reset all endpoints ? */ -} - -static void isp1760_udc_init_hw(struct isp1760_udc *udc) -{ - /* - * The device controller currently shares its interrupt with the host - * controller, the DC_IRQ polarity and signaling mode are ignored. Set - * the to active-low level-triggered. - * - * Configure the control, in and out pipes to generate interrupts on - * ACK tokens only (and NYET for the out pipe). The default - * configuration also generates an interrupt on the first NACK token. - */ - isp1760_udc_write(udc, DC_INTCONF, DC_CDBGMOD_ACK | DC_DDBGMODIN_ACK | - DC_DDBGMODOUT_ACK_NYET); - - isp1760_udc_write(udc, DC_INTENABLE, DC_IEPRXTX(7) | DC_IEPRXTX(6) | - DC_IEPRXTX(5) | DC_IEPRXTX(4) | DC_IEPRXTX(3) | - DC_IEPRXTX(2) | DC_IEPRXTX(1) | DC_IEPRXTX(0) | - DC_IEP0SETUP | DC_IEVBUS | DC_IERESM | DC_IESUSP | - DC_IEHS_STA | DC_IEBRST); - - if (udc->connected) - isp1760_set_pullup(udc->isp, true); - - isp1760_udc_write(udc, DC_ADDRESS, DC_DEVEN); -} - -static void isp1760_udc_reset(struct isp1760_udc *udc) -{ - unsigned long flags; - - spin_lock_irqsave(&udc->lock, flags); - - /* - * The bus reset has reset most registers to their default value, - * reinitialize the UDC hardware. - */ - isp1760_udc_init_hw(udc); - - udc->ep0_state = ISP1760_CTRL_SETUP; - udc->gadget.speed = USB_SPEED_FULL; - - usb_gadget_udc_reset(&udc->gadget, udc->driver); - - spin_unlock_irqrestore(&udc->lock, flags); -} - -static void isp1760_udc_suspend(struct isp1760_udc *udc) -{ - if (udc->gadget.state < USB_STATE_DEFAULT) - return; - - if (udc->driver->suspend) - udc->driver->suspend(&udc->gadget); -} - -static void isp1760_udc_resume(struct isp1760_udc *udc) -{ - if (udc->gadget.state < USB_STATE_DEFAULT) - return; - - if (udc->driver->resume) - udc->driver->resume(&udc->gadget); -} - -/* ----------------------------------------------------------------------------- - * Gadget Operations - */ - -static int isp1760_udc_get_frame(struct usb_gadget *gadget) -{ - struct isp1760_udc *udc = gadget_to_udc(gadget); - - return isp1760_udc_read(udc, DC_FRAMENUM) & ((1 << 11) - 1); -} - -static int isp1760_udc_wakeup(struct usb_gadget *gadget) -{ - struct isp1760_udc *udc = gadget_to_udc(gadget); - - dev_dbg(udc->isp->dev, "%s\n", __func__); - return -ENOTSUPP; -} - -static int isp1760_udc_set_selfpowered(struct usb_gadget *gadget, - int is_selfpowered) -{ - struct isp1760_udc *udc = gadget_to_udc(gadget); - - if (is_selfpowered) - udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED; - else - udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); - - return 0; -} - -static int isp1760_udc_pullup(struct usb_gadget *gadget, int is_on) -{ - struct isp1760_udc *udc = gadget_to_udc(gadget); - - isp1760_set_pullup(udc->isp, is_on); - udc->connected = is_on; - - return 0; -} - -static int isp1760_udc_start(struct usb_gadget *gadget, - struct usb_gadget_driver *driver) -{ - struct isp1760_udc *udc = gadget_to_udc(gadget); - - /* The hardware doesn't support low speed. */ - if (driver->max_speed < USB_SPEED_FULL) { - dev_err(udc->isp->dev, "Invalid gadget driver\n"); - return -EINVAL; - } - - spin_lock(&udc->lock); - - if (udc->driver) { - dev_err(udc->isp->dev, "UDC already has a gadget driver\n"); - spin_unlock(&udc->lock); - return -EBUSY; - } - - udc->driver = driver; - - spin_unlock(&udc->lock); - - dev_dbg(udc->isp->dev, "starting UDC with driver %s\n", - driver->function); - - udc->devstatus = 0; - udc->connected = true; - - usb_gadget_set_state(&udc->gadget, USB_STATE_ATTACHED); - - /* DMA isn't supported yet, don't enable the DMA clock. */ - isp1760_udc_write(udc, DC_MODE, DC_GLINTENA); - - isp1760_udc_init_hw(udc); - - dev_dbg(udc->isp->dev, "UDC started with driver %s\n", - driver->function); - - return 0; -} - -static int isp1760_udc_stop(struct usb_gadget *gadget) -{ - struct isp1760_udc *udc = gadget_to_udc(gadget); - - dev_dbg(udc->isp->dev, "%s\n", __func__); - - del_timer_sync(&udc->vbus_timer); - - isp1760_udc_write(udc, DC_MODE, 0); - - spin_lock(&udc->lock); - udc->driver = NULL; - spin_unlock(&udc->lock); - - return 0; -} - -static struct usb_gadget_ops isp1760_udc_ops = { - .get_frame = isp1760_udc_get_frame, - .wakeup = isp1760_udc_wakeup, - .set_selfpowered = isp1760_udc_set_selfpowered, - .pullup = isp1760_udc_pullup, - .udc_start = isp1760_udc_start, - .udc_stop = isp1760_udc_stop, -}; - -/* ----------------------------------------------------------------------------- - * Interrupt Handling - */ - -static irqreturn_t isp1760_udc_irq(int irq, void *dev) -{ - struct isp1760_udc *udc = dev; - unsigned int i; - u32 status; - - status = isp1760_udc_read(udc, DC_INTERRUPT) - & isp1760_udc_read(udc, DC_INTENABLE); - isp1760_udc_write(udc, DC_INTERRUPT, status); - - if (status & DC_IEVBUS) { - dev_dbg(udc->isp->dev, "%s(VBUS)\n", __func__); - /* The VBUS interrupt is only triggered when VBUS appears. */ - spin_lock(&udc->lock); - isp1760_udc_connect(udc); - spin_unlock(&udc->lock); - } - - if (status & DC_IEBRST) { - dev_dbg(udc->isp->dev, "%s(BRST)\n", __func__); - - isp1760_udc_reset(udc); - } - - for (i = 0; i <= 7; ++i) { - struct isp1760_ep *ep = &udc->ep[i*2]; - - if (status & DC_IEPTX(i)) { - dev_dbg(udc->isp->dev, "%s(EPTX%u)\n", __func__, i); - isp1760_ep_tx_complete(ep); - } - - if (status & DC_IEPRX(i)) { - dev_dbg(udc->isp->dev, "%s(EPRX%u)\n", __func__, i); - isp1760_ep_rx_ready(i ? ep - 1 : ep); - } - } - - if (status & DC_IEP0SETUP) { - dev_dbg(udc->isp->dev, "%s(EP0SETUP)\n", __func__); - - isp1760_ep0_setup(udc); - } - - if (status & DC_IERESM) { - dev_dbg(udc->isp->dev, "%s(RESM)\n", __func__); - isp1760_udc_resume(udc); - } - - if (status & DC_IESUSP) { - dev_dbg(udc->isp->dev, "%s(SUSP)\n", __func__); - - spin_lock(&udc->lock); - if (!(isp1760_udc_read(udc, DC_MODE) & DC_VBUSSTAT)) - isp1760_udc_disconnect(udc); - else - isp1760_udc_suspend(udc); - spin_unlock(&udc->lock); - } - - if (status & DC_IEHS_STA) { - dev_dbg(udc->isp->dev, "%s(HS_STA)\n", __func__); - udc->gadget.speed = USB_SPEED_HIGH; - } - - return status ? IRQ_HANDLED : IRQ_NONE; -} - -static void isp1760_udc_vbus_poll(unsigned long data) -{ - struct isp1760_udc *udc = (struct isp1760_udc *)data; - unsigned long flags; - - spin_lock_irqsave(&udc->lock, flags); - - if (!(isp1760_udc_read(udc, DC_MODE) & DC_VBUSSTAT)) - isp1760_udc_disconnect(udc); - else if (udc->gadget.state >= USB_STATE_POWERED) - mod_timer(&udc->vbus_timer, - jiffies + ISP1760_VBUS_POLL_INTERVAL); - - spin_unlock_irqrestore(&udc->lock, flags); -} - -/* ----------------------------------------------------------------------------- - * Registration - */ - -static void isp1760_udc_init_eps(struct isp1760_udc *udc) -{ - unsigned int i; - - INIT_LIST_HEAD(&udc->gadget.ep_list); - - for (i = 0; i < ARRAY_SIZE(udc->ep); ++i) { - struct isp1760_ep *ep = &udc->ep[i]; - unsigned int ep_num = (i + 1) / 2; - bool is_in = !(i & 1); - - ep->udc = udc; - - INIT_LIST_HEAD(&ep->queue); - - ep->addr = (ep_num && is_in ? USB_DIR_IN : USB_DIR_OUT) - | ep_num; - ep->desc = NULL; - - sprintf(ep->name, "ep%u%s", ep_num, - ep_num ? (is_in ? "in" : "out") : ""); - - ep->ep.ops = &isp1760_ep_ops; - ep->ep.name = ep->name; - - /* - * Hardcode the maximum packet sizes for now, to 64 bytes for - * the control endpoint and 512 bytes for all other endpoints. - * This fits in the 8kB FIFO without double-buffering. - */ - if (ep_num == 0) { - ep->ep.maxpacket = 64; - ep->maxpacket = 64; - udc->gadget.ep0 = &ep->ep; - } else { - ep->ep.maxpacket = 512; - ep->maxpacket = 0; - list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); - } - } -} - -static int isp1760_udc_init(struct isp1760_udc *udc) -{ - u16 scratch; - u32 chipid; - - /* - * Check that the controller is present by writing to the scratch - * register, modifying the bus pattern by reading from the chip ID - * register, and reading the scratch register value back. The chip ID - * and scratch register contents must match the expected values. - */ - isp1760_udc_write(udc, DC_SCRATCH, 0xbabe); - chipid = isp1760_udc_read(udc, DC_CHIPID); - scratch = isp1760_udc_read(udc, DC_SCRATCH); - - if (scratch != 0xbabe) { - dev_err(udc->isp->dev, - "udc: scratch test failed (0x%04x/0x%08x)\n", - scratch, chipid); - return -ENODEV; - } - - if (chipid != 0x00011582) { - dev_err(udc->isp->dev, "udc: invalid chip ID 0x%08x\n", chipid); - return -ENODEV; - } - - /* Reset the device controller. */ - isp1760_udc_write(udc, DC_MODE, DC_SFRESET); - usleep_range(10000, 11000); - isp1760_udc_write(udc, DC_MODE, 0); - usleep_range(10000, 11000); - - return 0; -} - -int isp1760_udc_register(struct isp1760_device *isp, int irq, - unsigned long irqflags) -{ - struct isp1760_udc *udc = &isp->udc; - const char *devname; - int ret; - - udc->irq = -1; - udc->isp = isp; - udc->regs = isp->regs; - - spin_lock_init(&udc->lock); - setup_timer(&udc->vbus_timer, isp1760_udc_vbus_poll, - (unsigned long)udc); - - ret = isp1760_udc_init(udc); - if (ret < 0) - return ret; - - devname = dev_name(isp->dev); - udc->irqname = kmalloc(strlen(devname) + 7, GFP_KERNEL); - if (!udc->irqname) - return -ENOMEM; - - sprintf(udc->irqname, "%s (udc)", devname); - - ret = request_irq(irq, isp1760_udc_irq, IRQF_SHARED | IRQF_DISABLED | - irqflags, udc->irqname, udc); - if (ret < 0) - goto error; - - udc->irq = irq; - - /* - * Initialize the gadget static fields and register its device. Gadget - * fields that vary during the life time of the gadget are initialized - * by the UDC core. - */ - udc->gadget.ops = &isp1760_udc_ops; - udc->gadget.speed = USB_SPEED_UNKNOWN; - udc->gadget.max_speed = USB_SPEED_HIGH; - udc->gadget.name = "isp1761_udc"; - - isp1760_udc_init_eps(udc); - - ret = usb_add_gadget_udc(isp->dev, &udc->gadget); - if (ret < 0) - goto error; - - return 0; - -error: - if (udc->irq >= 0) - free_irq(udc->irq, udc); - kfree(udc->irqname); - - return ret; -} - -void isp1760_udc_unregister(struct isp1760_device *isp) -{ - struct isp1760_udc *udc = &isp->udc; - - usb_del_gadget_udc(&udc->gadget); - - free_irq(udc->irq, udc); - kfree(udc->irqname); -} diff --git a/drivers/usb/host/isp1760-udc.h b/drivers/usb/host/isp1760-udc.h deleted file mode 100644 index 4af6ba6eda86..000000000000 --- a/drivers/usb/host/isp1760-udc.h +++ /dev/null @@ -1,106 +0,0 @@ -/* - * Driver for the NXP ISP1761 device controller - * - * Copyright 2014 Ideas on Board Oy - * - * Contacts: - * Laurent Pinchart - * - * 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. - */ - -#ifndef _ISP1760_UDC_H_ -#define _ISP1760_UDC_H_ - -#include -#include -#include -#include -#include - -struct isp1760_device; -struct isp1760_udc; - -enum isp1760_ctrl_state { - ISP1760_CTRL_SETUP, /* Waiting for a SETUP transaction */ - ISP1760_CTRL_DATA_IN, /* Setup received, data IN stage */ - ISP1760_CTRL_DATA_OUT, /* Setup received, data OUT stage */ - ISP1760_CTRL_STATUS, /* 0-length request in status stage */ -}; - -struct isp1760_ep { - struct isp1760_udc *udc; - struct usb_ep ep; - - struct list_head queue; - - unsigned int addr; - unsigned int maxpacket; - char name[7]; - - const struct usb_endpoint_descriptor *desc; - - bool rx_pending; - bool halted; - bool wedged; -}; - -/** - * struct isp1760_udc - UDC state information - * irq: IRQ number - * irqname: IRQ name (as passed to request_irq) - * regs: Base address of the UDC registers - * driver: Gadget driver - * gadget: Gadget device - * lock: Protects driver, vbus_timer, ep, ep0_*, DC_EPINDEX register - * ep: Array of endpoints - * ep0_state: Control request state for endpoint 0 - * ep0_dir: Direction of the current control request - * ep0_length: Length of the current control request - * connected: Tracks gadget driver bus connection state - */ -struct isp1760_udc { -#if CONFIG_USB_ISP1761_UDC - struct isp1760_device *isp; - - int irq; - char *irqname; - void __iomem *regs; - - struct usb_gadget_driver *driver; - struct usb_gadget gadget; - - spinlock_t lock; - struct timer_list vbus_timer; - - struct isp1760_ep ep[15]; - - enum isp1760_ctrl_state ep0_state; - u8 ep0_dir; - u16 ep0_length; - - bool connected; - - unsigned int devstatus; -#endif -}; - -#if CONFIG_USB_ISP1761_UDC -int isp1760_udc_register(struct isp1760_device *isp, int irq, - unsigned long irqflags); -void isp1760_udc_unregister(struct isp1760_device *isp); -#else -static inline int isp1760_udc_register(struct isp1760_device *isp, int irq, - unsigned long irqflags) -{ - return 0; -} - -static inline void isp1760_udc_unregister(struct isp1760_device *isp) -{ -} -#endif - -#endif diff --git a/drivers/usb/isp1760/Kconfig b/drivers/usb/isp1760/Kconfig new file mode 100644 index 000000000000..c09ab8fa0e10 --- /dev/null +++ b/drivers/usb/isp1760/Kconfig @@ -0,0 +1,22 @@ +config USB_ISP1760 + tristate "NXP ISP 1760/1761 support" + depends on USB + help + Say Y or M here if your system as an ISP1760 USB host controller + or an ISP1761 USB dual-role controller. + + This driver does not support isochronous transfers or OTG. + This USB controller is usually attached to a non-DMA-Master + capable bus. NXP's eval kit brings this chip on PCI card + where the chip itself is behind a PLB to simulate such + a bus. + + To compile this driver as a module, choose M here: the + module will be called isp1760. + +config USB_ISP1761_UDC + boolean "NXP ISP1761 USB Device Controller" + depends on USB_ISP1760 && USB_GADGET + help + The NXP ISP1761 is a dual-role high-speed USB host and device + controller. diff --git a/drivers/usb/isp1760/Makefile b/drivers/usb/isp1760/Makefile new file mode 100644 index 000000000000..698ccb0b2c65 --- /dev/null +++ b/drivers/usb/isp1760/Makefile @@ -0,0 +1,4 @@ +isp1760-y := isp1760-core.o isp1760-hcd.o isp1760-if.o +isp1760-$(CONFIG_USB_ISP1761_UDC) += isp1760-udc.o + +obj-$(CONFIG_USB_ISP1760) += isp1760.o diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c new file mode 100644 index 000000000000..727e90ad15bd --- /dev/null +++ b/drivers/usb/isp1760/isp1760-core.c @@ -0,0 +1,171 @@ +/* + * Driver for the NXP ISP1760 chip + * + * Copyright 2014 Laurent Pinchart + * Copyright 2007 Sebastian Siewior + * + * Contacts: + * Sebastian Siewior + * Laurent Pinchart + * + * 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 +#include +#include +#include +#include +#include +#include + +#include "isp1760-core.h" +#include "isp1760-hcd.h" +#include "isp1760-regs.h" +#include "isp1760-udc.h" + +static void isp1760_init_core(struct isp1760_device *isp) +{ + u32 otgctrl; + u32 hwmode; + + /* Low-level chip reset */ + if (isp->rst_gpio) { + gpiod_set_value_cansleep(isp->rst_gpio, 1); + mdelay(50); + gpiod_set_value_cansleep(isp->rst_gpio, 0); + } + + /* + * Reset the host controller, including the CPU interface + * configuration. + */ + isp1760_write32(isp->regs, HC_RESET_REG, SW_RESET_RESET_ALL); + msleep(100); + + /* Setup HW Mode Control: This assumes a level active-low interrupt */ + hwmode = HW_DATA_BUS_32BIT; + + if (isp->devflags & ISP1760_FLAG_BUS_WIDTH_16) + hwmode &= ~HW_DATA_BUS_32BIT; + if (isp->devflags & ISP1760_FLAG_ANALOG_OC) + hwmode |= HW_ANA_DIGI_OC; + if (isp->devflags & ISP1760_FLAG_DACK_POL_HIGH) + hwmode |= HW_DACK_POL_HIGH; + if (isp->devflags & ISP1760_FLAG_DREQ_POL_HIGH) + hwmode |= HW_DREQ_POL_HIGH; + if (isp->devflags & ISP1760_FLAG_INTR_POL_HIGH) + hwmode |= HW_INTR_HIGH_ACT; + if (isp->devflags & ISP1760_FLAG_INTR_EDGE_TRIG) + hwmode |= HW_INTR_EDGE_TRIG; + + /* + * The ISP1761 has a dedicated DC IRQ line but supports sharing the HC + * IRQ line for both the host and device controllers. Hardcode IRQ + * sharing for now and disable the DC interrupts globally to avoid + * spurious interrupts during HCD registration. + */ + if (isp->devflags & ISP1760_FLAG_ISP1761) { + isp1760_write32(isp->regs, DC_MODE, 0); + hwmode |= HW_COMN_IRQ; + } + + /* + * We have to set this first in case we're in 16-bit mode. + * Write it twice to ensure correct upper bits if switching + * to 16-bit mode. + */ + isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); + isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); + + /* + * PORT 1 Control register of the ISP1760 is the OTG control register + * on ISP1761. + * + * TODO: Really support OTG. For now we configure port 1 in device mode + * when OTG is requested. + */ + if ((isp->devflags & ISP1760_FLAG_ISP1761) && + (isp->devflags & ISP1760_FLAG_OTG_EN)) + otgctrl = ((HW_DM_PULLDOWN | HW_DP_PULLDOWN) << 16) + | HW_OTG_DISABLE; + else + otgctrl = (HW_SW_SEL_HC_DC << 16) + | (HW_VBUS_DRV | HW_SEL_CP_EXT); + + isp1760_write32(isp->regs, HC_PORT1_CTRL, otgctrl); + + dev_info(isp->dev, "bus width: %u, oc: %s\n", + isp->devflags & ISP1760_FLAG_BUS_WIDTH_16 ? 16 : 32, + isp->devflags & ISP1760_FLAG_ANALOG_OC ? "analog" : "digital"); +} + +void isp1760_set_pullup(struct isp1760_device *isp, bool enable) +{ + isp1760_write32(isp->regs, HW_OTG_CTRL_SET, + enable ? HW_DP_PULLUP : HW_DP_PULLUP << 16); +} + +int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, + struct device *dev, unsigned int devflags) +{ + struct isp1760_device *isp; + int ret; + + if (usb_disabled()) + return -ENODEV; + + /* prevent usb-core allocating DMA pages */ + dev->dma_mask = NULL; + + isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL); + if (!isp) + return -ENOMEM; + + isp->dev = dev; + isp->devflags = devflags; + + isp->rst_gpio = devm_gpiod_get_optional(dev, NULL, GPIOD_OUT_HIGH); + if (IS_ERR(isp->rst_gpio)) + return PTR_ERR(isp->rst_gpio); + + isp->regs = devm_ioremap_resource(dev, mem); + if (IS_ERR(isp->regs)) + return PTR_ERR(isp->regs); + + isp1760_init_core(isp); + + ret = isp1760_hcd_register(&isp->hcd, isp->regs, mem, irq, + irqflags | IRQF_SHARED, dev); + if (ret < 0) + return ret; + + if (devflags & ISP1760_FLAG_ISP1761) { + ret = isp1760_udc_register(isp, irq, irqflags | IRQF_SHARED | + IRQF_DISABLED); + if (ret < 0) { + isp1760_hcd_unregister(&isp->hcd); + return ret; + } + } + + dev_set_drvdata(dev, isp); + + return 0; +} + +void isp1760_unregister(struct device *dev) +{ + struct isp1760_device *isp = dev_get_drvdata(dev); + + if (isp->devflags & ISP1760_FLAG_ISP1761) + isp1760_udc_unregister(isp); + + isp1760_hcd_unregister(&isp->hcd); +} + +MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP"); +MODULE_AUTHOR("Sebastian Siewior "); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/isp1760/isp1760-core.h b/drivers/usb/isp1760/isp1760-core.h new file mode 100644 index 000000000000..c70f8368a794 --- /dev/null +++ b/drivers/usb/isp1760/isp1760-core.h @@ -0,0 +1,68 @@ +/* + * Driver for the NXP ISP1760 chip + * + * Copyright 2014 Laurent Pinchart + * Copyright 2007 Sebastian Siewior + * + * Contacts: + * Sebastian Siewior + * Laurent Pinchart + * + * 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. + */ + +#ifndef _ISP1760_CORE_H_ +#define _ISP1760_CORE_H_ + +#include + +#include "isp1760-hcd.h" +#include "isp1760-udc.h" + +struct device; +struct gpio_desc; + +/* + * Device flags that can vary from board to board. All of these + * indicate the most "atypical" case, so that a devflags of 0 is + * a sane default configuration. + */ +#define ISP1760_FLAG_BUS_WIDTH_16 0x00000002 /* 16-bit data bus width */ +#define ISP1760_FLAG_OTG_EN 0x00000004 /* Port 1 supports OTG */ +#define ISP1760_FLAG_ANALOG_OC 0x00000008 /* Analog overcurrent */ +#define ISP1760_FLAG_DACK_POL_HIGH 0x00000010 /* DACK active high */ +#define ISP1760_FLAG_DREQ_POL_HIGH 0x00000020 /* DREQ active high */ +#define ISP1760_FLAG_ISP1761 0x00000040 /* Chip is ISP1761 */ +#define ISP1760_FLAG_INTR_POL_HIGH 0x00000080 /* Interrupt polarity active high */ +#define ISP1760_FLAG_INTR_EDGE_TRIG 0x00000100 /* Interrupt edge triggered */ + +struct isp1760_device { + struct device *dev; + + void __iomem *regs; + unsigned int devflags; + struct gpio_desc *rst_gpio; + + struct isp1760_hcd hcd; + struct isp1760_udc udc; +}; + +int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, + struct device *dev, unsigned int devflags); +void isp1760_unregister(struct device *dev); + +void isp1760_set_pullup(struct isp1760_device *isp, bool enable); + +static inline u32 isp1760_read32(void __iomem *base, u32 reg) +{ + return readl(base + reg); +} + +static inline void isp1760_write32(void __iomem *base, u32 reg, u32 val) +{ + writel(val, base + reg); +} + +#endif diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c new file mode 100644 index 000000000000..568446c9ce8d --- /dev/null +++ b/drivers/usb/isp1760/isp1760-hcd.c @@ -0,0 +1,2231 @@ +/* + * Driver for the NXP ISP1760 chip + * + * However, the code might contain some bugs. What doesn't work for sure is: + * - ISO + * - OTG + e The interrupt line is configured as active low, level. + * + * (c) 2007 Sebastian Siewior + * + * (c) 2011 Arvid Brodin + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "isp1760-core.h" +#include "isp1760-hcd.h" +#include "isp1760-regs.h" + +static struct kmem_cache *qtd_cachep; +static struct kmem_cache *qh_cachep; +static struct kmem_cache *urb_listitem_cachep; + +typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh, + struct isp1760_qtd *qtd); + +static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd) +{ + return *(struct isp1760_hcd **)hcd->hcd_priv; +} + +/* urb state*/ +#define DELETE_URB (0x0008) +#define NO_TRANSFER_ACTIVE (0xffffffff) + +/* Philips Proprietary Transfer Descriptor (PTD) */ +typedef __u32 __bitwise __dw; +struct ptd { + __dw dw0; + __dw dw1; + __dw dw2; + __dw dw3; + __dw dw4; + __dw dw5; + __dw dw6; + __dw dw7; +}; +#define PTD_OFFSET 0x0400 +#define ISO_PTD_OFFSET 0x0400 +#define INT_PTD_OFFSET 0x0800 +#define ATL_PTD_OFFSET 0x0c00 +#define PAYLOAD_OFFSET 0x1000 + + +/* ATL */ +/* DW0 */ +#define DW0_VALID_BIT 1 +#define FROM_DW0_VALID(x) ((x) & 0x01) +#define TO_DW0_LENGTH(x) (((u32) x) << 3) +#define TO_DW0_MAXPACKET(x) (((u32) x) << 18) +#define TO_DW0_MULTI(x) (((u32) x) << 29) +#define TO_DW0_ENDPOINT(x) (((u32) x) << 31) +/* DW1 */ +#define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3) +#define TO_DW1_PID_TOKEN(x) (((u32) x) << 10) +#define DW1_TRANS_BULK ((u32) 2 << 12) +#define DW1_TRANS_INT ((u32) 3 << 12) +#define DW1_TRANS_SPLIT ((u32) 1 << 14) +#define DW1_SE_USB_LOSPEED ((u32) 2 << 16) +#define TO_DW1_PORT_NUM(x) (((u32) x) << 18) +#define TO_DW1_HUB_NUM(x) (((u32) x) << 25) +/* DW2 */ +#define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8) +#define TO_DW2_RL(x) ((x) << 25) +#define FROM_DW2_RL(x) (((x) >> 25) & 0xf) +/* DW3 */ +#define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff) +#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff) +#define TO_DW3_NAKCOUNT(x) ((x) << 19) +#define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf) +#define TO_DW3_CERR(x) ((x) << 23) +#define FROM_DW3_CERR(x) (((x) >> 23) & 0x3) +#define TO_DW3_DATA_TOGGLE(x) ((x) << 25) +#define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1) +#define TO_DW3_PING(x) ((x) << 26) +#define FROM_DW3_PING(x) (((x) >> 26) & 0x1) +#define DW3_ERROR_BIT (1 << 28) +#define DW3_BABBLE_BIT (1 << 29) +#define DW3_HALT_BIT (1 << 30) +#define DW3_ACTIVE_BIT (1 << 31) +#define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01) + +#define INT_UNDERRUN (1 << 2) +#define INT_BABBLE (1 << 1) +#define INT_EXACT (1 << 0) + +#define SETUP_PID (2) +#define IN_PID (1) +#define OUT_PID (0) + +/* Errata 1 */ +#define RL_COUNTER (0) +#define NAK_COUNTER (0) +#define ERR_COUNTER (2) + +struct isp1760_qtd { + u8 packet_type; + void *data_buffer; + u32 payload_addr; + + /* the rest is HCD-private */ + struct list_head qtd_list; + struct urb *urb; + size_t length; + size_t actual_length; + + /* QTD_ENQUEUED: waiting for transfer (inactive) */ + /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */ + /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only + interrupt handler may touch this qtd! */ + /* QTD_XFER_COMPLETE: payload has been transferred successfully */ + /* QTD_RETIRE: transfer error/abort qtd */ +#define QTD_ENQUEUED 0 +#define QTD_PAYLOAD_ALLOC 1 +#define QTD_XFER_STARTED 2 +#define QTD_XFER_COMPLETE 3 +#define QTD_RETIRE 4 + u32 status; +}; + +/* Queue head, one for each active endpoint */ +struct isp1760_qh { + struct list_head qh_list; + struct list_head qtd_list; + u32 toggle; + u32 ping; + int slot; + int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */ +}; + +struct urb_listitem { + struct list_head urb_list; + struct urb *urb; +}; + +/* + * Access functions for isp176x registers (addresses 0..0x03FF). + */ +static u32 reg_read32(void __iomem *base, u32 reg) +{ + return isp1760_read32(base, reg); +} + +static void reg_write32(void __iomem *base, u32 reg, u32 val) +{ + isp1760_write32(base, reg, val); +} + +/* + * Access functions for isp176x memory (offset >= 0x0400). + * + * bank_reads8() reads memory locations prefetched by an earlier write to + * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi- + * bank optimizations, you should use the more generic mem_reads8() below. + * + * For access to ptd memory, use the specialized ptd_read() and ptd_write() + * below. + * + * These functions copy via MMIO data to/from the device. memcpy_{to|from}io() + * doesn't quite work because some people have to enforce 32-bit access + */ +static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr, + __u32 *dst, u32 bytes) +{ + __u32 __iomem *src; + u32 val; + __u8 *src_byteptr; + __u8 *dst_byteptr; + + src = src_base + (bank_addr | src_offset); + + if (src_offset < PAYLOAD_OFFSET) { + while (bytes >= 4) { + *dst = le32_to_cpu(__raw_readl(src)); + bytes -= 4; + src++; + dst++; + } + } else { + while (bytes >= 4) { + *dst = __raw_readl(src); + bytes -= 4; + src++; + dst++; + } + } + + if (!bytes) + return; + + /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully + * allocated. + */ + if (src_offset < PAYLOAD_OFFSET) + val = le32_to_cpu(__raw_readl(src)); + else + val = __raw_readl(src); + + dst_byteptr = (void *) dst; + src_byteptr = (void *) &val; + while (bytes > 0) { + *dst_byteptr = *src_byteptr; + dst_byteptr++; + src_byteptr++; + bytes--; + } +} + +static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst, + u32 bytes) +{ + reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0)); + ndelay(90); + bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes); +} + +static void mem_writes8(void __iomem *dst_base, u32 dst_offset, + __u32 const *src, u32 bytes) +{ + __u32 __iomem *dst; + + dst = dst_base + dst_offset; + + if (dst_offset < PAYLOAD_OFFSET) { + while (bytes >= 4) { + __raw_writel(cpu_to_le32(*src), dst); + bytes -= 4; + src++; + dst++; + } + } else { + while (bytes >= 4) { + __raw_writel(*src, dst); + bytes -= 4; + src++; + dst++; + } + } + + if (!bytes) + return; + /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the + * extra bytes should not be read by the HW. + */ + + if (dst_offset < PAYLOAD_OFFSET) + __raw_writel(cpu_to_le32(*src), dst); + else + __raw_writel(*src, dst); +} + +/* + * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET, + * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32. + */ +static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot, + struct ptd *ptd) +{ + reg_write32(base, HC_MEMORY_REG, + ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd)); + ndelay(90); + bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0), + (void *) ptd, sizeof(*ptd)); +} + +static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot, + struct ptd *ptd) +{ + mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0), + &ptd->dw1, 7*sizeof(ptd->dw1)); + /* Make sure dw0 gets written last (after other dw's and after payload) + since it contains the enable bit */ + wmb(); + mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0, + sizeof(ptd->dw0)); +} + + +/* memory management of the 60kb on the chip from 0x1000 to 0xffff */ +static void init_memory(struct isp1760_hcd *priv) +{ + int i, curr; + u32 payload_addr; + + payload_addr = PAYLOAD_OFFSET; + for (i = 0; i < BLOCK_1_NUM; i++) { + priv->memory_pool[i].start = payload_addr; + priv->memory_pool[i].size = BLOCK_1_SIZE; + priv->memory_pool[i].free = 1; + payload_addr += priv->memory_pool[i].size; + } + + curr = i; + for (i = 0; i < BLOCK_2_NUM; i++) { + priv->memory_pool[curr + i].start = payload_addr; + priv->memory_pool[curr + i].size = BLOCK_2_SIZE; + priv->memory_pool[curr + i].free = 1; + payload_addr += priv->memory_pool[curr + i].size; + } + + curr = i; + for (i = 0; i < BLOCK_3_NUM; i++) { + priv->memory_pool[curr + i].start = payload_addr; + priv->memory_pool[curr + i].size = BLOCK_3_SIZE; + priv->memory_pool[curr + i].free = 1; + payload_addr += priv->memory_pool[curr + i].size; + } + + WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE); +} + +static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int i; + + WARN_ON(qtd->payload_addr); + + if (!qtd->length) + return; + + for (i = 0; i < BLOCKS; i++) { + if (priv->memory_pool[i].size >= qtd->length && + priv->memory_pool[i].free) { + priv->memory_pool[i].free = 0; + qtd->payload_addr = priv->memory_pool[i].start; + return; + } + } +} + +static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int i; + + if (!qtd->payload_addr) + return; + + for (i = 0; i < BLOCKS; i++) { + if (priv->memory_pool[i].start == qtd->payload_addr) { + WARN_ON(priv->memory_pool[i].free); + priv->memory_pool[i].free = 1; + qtd->payload_addr = 0; + return; + } + } + + dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n", + __func__, qtd->payload_addr); + WARN_ON(1); + qtd->payload_addr = 0; +} + +static int handshake(struct usb_hcd *hcd, u32 reg, + u32 mask, u32 done, int usec) +{ + u32 result; + + do { + result = reg_read32(hcd->regs, reg); + if (result == ~0) + return -ENODEV; + result &= mask; + if (result == done) + return 0; + udelay(1); + usec--; + } while (usec > 0); + return -ETIMEDOUT; +} + +/* reset a non-running (STS_HALT == 1) controller */ +static int ehci_reset(struct usb_hcd *hcd) +{ + int retval; + struct isp1760_hcd *priv = hcd_to_priv(hcd); + + u32 command = reg_read32(hcd->regs, HC_USBCMD); + + command |= CMD_RESET; + reg_write32(hcd->regs, HC_USBCMD, command); + hcd->state = HC_STATE_HALT; + priv->next_statechange = jiffies; + retval = handshake(hcd, HC_USBCMD, + CMD_RESET, 0, 250 * 1000); + return retval; +} + +static struct isp1760_qh *qh_alloc(gfp_t flags) +{ + struct isp1760_qh *qh; + + qh = kmem_cache_zalloc(qh_cachep, flags); + if (!qh) + return NULL; + + INIT_LIST_HEAD(&qh->qh_list); + INIT_LIST_HEAD(&qh->qtd_list); + qh->slot = -1; + + return qh; +} + +static void qh_free(struct isp1760_qh *qh) +{ + WARN_ON(!list_empty(&qh->qtd_list)); + WARN_ON(qh->slot > -1); + kmem_cache_free(qh_cachep, qh); +} + +/* one-time init, only for memory state */ +static int priv_init(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + u32 hcc_params; + int i; + + spin_lock_init(&priv->lock); + + for (i = 0; i < QH_END; i++) + INIT_LIST_HEAD(&priv->qh_list[i]); + + /* + * hw default: 1K periodic list heads, one per frame. + * periodic_size can shrink by USBCMD update if hcc_params allows. + */ + priv->periodic_size = DEFAULT_I_TDPS; + + /* controllers may cache some of the periodic schedule ... */ + hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS); + /* full frame cache */ + if (HCC_ISOC_CACHE(hcc_params)) + priv->i_thresh = 8; + else /* N microframes cached */ + priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); + + return 0; +} + +static int isp1760_hc_setup(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int result; + u32 scratch, hwmode; + + reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe); + /* Change bus pattern */ + scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG); + scratch = reg_read32(hcd->regs, HC_SCRATCH_REG); + if (scratch != 0xdeadbabe) { + dev_err(hcd->self.controller, "Scratch test failed.\n"); + return -ENODEV; + } + + /* + * The RESET_HC bit in the SW_RESET register is supposed to reset the + * host controller without touching the CPU interface registers, but at + * least on the ISP1761 it seems to behave as the RESET_ALL bit and + * reset the whole device. We thus can't use it here, so let's reset + * the host controller through the EHCI USB Command register. The device + * has been reset in core code anyway, so this shouldn't matter. + */ + reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0); + reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); + reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); + reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); + + result = ehci_reset(hcd); + if (result) + return result; + + /* Step 11 passed */ + + /* ATL reset */ + hwmode = reg_read32(hcd->regs, HC_HW_MODE_CTRL) & ~ALL_ATX_RESET; + reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET); + mdelay(10); + reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); + + reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK); + + priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS); + + return priv_init(hcd); +} + +static u32 base_to_chip(u32 base) +{ + return ((base - 0x400) >> 3); +} + +static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh) +{ + struct urb *urb; + + if (list_is_last(&qtd->qtd_list, &qh->qtd_list)) + return 1; + + urb = qtd->urb; + qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list); + return (qtd->urb != urb); +} + +/* magic numbers that can affect system performance */ +#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ +#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ +#define EHCI_TUNE_RL_TT 0 +#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ +#define EHCI_TUNE_MULT_TT 1 +#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ + +static void create_ptd_atl(struct isp1760_qh *qh, + struct isp1760_qtd *qtd, struct ptd *ptd) +{ + u32 maxpacket; + u32 multi; + u32 rl = RL_COUNTER; + u32 nak = NAK_COUNTER; + + memset(ptd, 0, sizeof(*ptd)); + + /* according to 3.6.2, max packet len can not be > 0x400 */ + maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe, + usb_pipeout(qtd->urb->pipe)); + multi = 1 + ((maxpacket >> 11) & 0x3); + maxpacket &= 0x7ff; + + /* DW0 */ + ptd->dw0 = DW0_VALID_BIT; + ptd->dw0 |= TO_DW0_LENGTH(qtd->length); + ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket); + ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); + + /* DW1 */ + ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1; + ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); + ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type); + + if (usb_pipebulk(qtd->urb->pipe)) + ptd->dw1 |= DW1_TRANS_BULK; + else if (usb_pipeint(qtd->urb->pipe)) + ptd->dw1 |= DW1_TRANS_INT; + + if (qtd->urb->dev->speed != USB_SPEED_HIGH) { + /* split transaction */ + + ptd->dw1 |= DW1_TRANS_SPLIT; + if (qtd->urb->dev->speed == USB_SPEED_LOW) + ptd->dw1 |= DW1_SE_USB_LOSPEED; + + ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport); + ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum); + + /* SE bit for Split INT transfers */ + if (usb_pipeint(qtd->urb->pipe) && + (qtd->urb->dev->speed == USB_SPEED_LOW)) + ptd->dw1 |= 2 << 16; + + rl = 0; + nak = 0; + } else { + ptd->dw0 |= TO_DW0_MULTI(multi); + if (usb_pipecontrol(qtd->urb->pipe) || + usb_pipebulk(qtd->urb->pipe)) + ptd->dw3 |= TO_DW3_PING(qh->ping); + } + /* DW2 */ + ptd->dw2 = 0; + ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr)); + ptd->dw2 |= TO_DW2_RL(rl); + + /* DW3 */ + ptd->dw3 |= TO_DW3_NAKCOUNT(nak); + ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle); + if (usb_pipecontrol(qtd->urb->pipe)) { + if (qtd->data_buffer == qtd->urb->setup_packet) + ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1); + else if (last_qtd_of_urb(qtd, qh)) + ptd->dw3 |= TO_DW3_DATA_TOGGLE(1); + } + + ptd->dw3 |= DW3_ACTIVE_BIT; + /* Cerr */ + ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER); +} + +static void transform_add_int(struct isp1760_qh *qh, + struct isp1760_qtd *qtd, struct ptd *ptd) +{ + u32 usof; + u32 period; + + /* + * Most of this is guessing. ISP1761 datasheet is quite unclear, and + * the algorithm from the original Philips driver code, which was + * pretty much used in this driver before as well, is quite horrendous + * and, i believe, incorrect. The code below follows the datasheet and + * USB2.0 spec as far as I can tell, and plug/unplug seems to be much + * more reliable this way (fingers crossed...). + */ + + if (qtd->urb->dev->speed == USB_SPEED_HIGH) { + /* urb->interval is in units of microframes (1/8 ms) */ + period = qtd->urb->interval >> 3; + + if (qtd->urb->interval > 4) + usof = 0x01; /* One bit set => + interval 1 ms * uFrame-match */ + else if (qtd->urb->interval > 2) + usof = 0x22; /* Two bits set => interval 1/2 ms */ + else if (qtd->urb->interval > 1) + usof = 0x55; /* Four bits set => interval 1/4 ms */ + else + usof = 0xff; /* All bits set => interval 1/8 ms */ + } else { + /* urb->interval is in units of frames (1 ms) */ + period = qtd->urb->interval; + usof = 0x0f; /* Execute Start Split on any of the + four first uFrames */ + + /* + * First 8 bits in dw5 is uSCS and "specifies which uSOF the + * complete split needs to be sent. Valid only for IN." Also, + * "All bits can be set to one for every transfer." (p 82, + * ISP1761 data sheet.) 0x1c is from Philips driver. Where did + * that number come from? 0xff seems to work fine... + */ + /* ptd->dw5 = 0x1c; */ + ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */ + } + + period = period >> 1;/* Ensure equal or shorter period than requested */ + period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */ + + ptd->dw2 |= period; + ptd->dw4 = usof; +} + +static void create_ptd_int(struct isp1760_qh *qh, + struct isp1760_qtd *qtd, struct ptd *ptd) +{ + create_ptd_atl(qh, qtd, ptd); + transform_add_int(qh, qtd, ptd); +} + +static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb) +__releases(priv->lock) +__acquires(priv->lock) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + + if (!urb->unlinked) { + if (urb->status == -EINPROGRESS) + urb->status = 0; + } + + if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) { + void *ptr; + for (ptr = urb->transfer_buffer; + ptr < urb->transfer_buffer + urb->transfer_buffer_length; + ptr += PAGE_SIZE) + flush_dcache_page(virt_to_page(ptr)); + } + + /* complete() can reenter this HCD */ + usb_hcd_unlink_urb_from_ep(hcd, urb); + spin_unlock(&priv->lock); + usb_hcd_giveback_urb(hcd, urb, urb->status); + spin_lock(&priv->lock); +} + +static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb, + u8 packet_type) +{ + struct isp1760_qtd *qtd; + + qtd = kmem_cache_zalloc(qtd_cachep, flags); + if (!qtd) + return NULL; + + INIT_LIST_HEAD(&qtd->qtd_list); + qtd->urb = urb; + qtd->packet_type = packet_type; + qtd->status = QTD_ENQUEUED; + qtd->actual_length = 0; + + return qtd; +} + +static void qtd_free(struct isp1760_qtd *qtd) +{ + WARN_ON(qtd->payload_addr); + kmem_cache_free(qtd_cachep, qtd); +} + +static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot, + struct isp1760_slotinfo *slots, + struct isp1760_qtd *qtd, struct isp1760_qh *qh, + struct ptd *ptd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int skip_map; + + WARN_ON((slot < 0) || (slot > 31)); + WARN_ON(qtd->length && !qtd->payload_addr); + WARN_ON(slots[slot].qtd); + WARN_ON(slots[slot].qh); + WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC); + + /* Make sure done map has not triggered from some unlinked transfer */ + if (ptd_offset == ATL_PTD_OFFSET) { + priv->atl_done_map |= reg_read32(hcd->regs, + HC_ATL_PTD_DONEMAP_REG); + priv->atl_done_map &= ~(1 << slot); + } else { + priv->int_done_map |= reg_read32(hcd->regs, + HC_INT_PTD_DONEMAP_REG); + priv->int_done_map &= ~(1 << slot); + } + + qh->slot = slot; + qtd->status = QTD_XFER_STARTED; + slots[slot].timestamp = jiffies; + slots[slot].qtd = qtd; + slots[slot].qh = qh; + ptd_write(hcd->regs, ptd_offset, slot, ptd); + + if (ptd_offset == ATL_PTD_OFFSET) { + skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); + skip_map &= ~(1 << qh->slot); + reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); + } else { + skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); + skip_map &= ~(1 << qh->slot); + reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); + } +} + +static int is_short_bulk(struct isp1760_qtd *qtd) +{ + return (usb_pipebulk(qtd->urb->pipe) && + (qtd->actual_length < qtd->length)); +} + +static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh, + struct list_head *urb_list) +{ + int last_qtd; + struct isp1760_qtd *qtd, *qtd_next; + struct urb_listitem *urb_listitem; + + list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) { + if (qtd->status < QTD_XFER_COMPLETE) + break; + + last_qtd = last_qtd_of_urb(qtd, qh); + + if ((!last_qtd) && (qtd->status == QTD_RETIRE)) + qtd_next->status = QTD_RETIRE; + + if (qtd->status == QTD_XFER_COMPLETE) { + if (qtd->actual_length) { + switch (qtd->packet_type) { + case IN_PID: + mem_reads8(hcd->regs, qtd->payload_addr, + qtd->data_buffer, + qtd->actual_length); + /* Fall through (?) */ + case OUT_PID: + qtd->urb->actual_length += + qtd->actual_length; + /* Fall through ... */ + case SETUP_PID: + break; + } + } + + if (is_short_bulk(qtd)) { + if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) + qtd->urb->status = -EREMOTEIO; + if (!last_qtd) + qtd_next->status = QTD_RETIRE; + } + } + + if (qtd->payload_addr) + free_mem(hcd, qtd); + + if (last_qtd) { + if ((qtd->status == QTD_RETIRE) && + (qtd->urb->status == -EINPROGRESS)) + qtd->urb->status = -EPIPE; + /* Defer calling of urb_done() since it releases lock */ + urb_listitem = kmem_cache_zalloc(urb_listitem_cachep, + GFP_ATOMIC); + if (unlikely(!urb_listitem)) + break; /* Try again on next call */ + urb_listitem->urb = qtd->urb; + list_add_tail(&urb_listitem->urb_list, urb_list); + } + + list_del(&qtd->qtd_list); + qtd_free(qtd); + } +} + +#define ENQUEUE_DEPTH 2 +static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int ptd_offset; + struct isp1760_slotinfo *slots; + int curr_slot, free_slot; + int n; + struct ptd ptd; + struct isp1760_qtd *qtd; + + if (unlikely(list_empty(&qh->qtd_list))) { + WARN_ON(1); + return; + } + + /* Make sure this endpoint's TT buffer is clean before queueing ptds */ + if (qh->tt_buffer_dirty) + return; + + if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd, + qtd_list)->urb->pipe)) { + ptd_offset = INT_PTD_OFFSET; + slots = priv->int_slots; + } else { + ptd_offset = ATL_PTD_OFFSET; + slots = priv->atl_slots; + } + + free_slot = -1; + for (curr_slot = 0; curr_slot < 32; curr_slot++) { + if ((free_slot == -1) && (slots[curr_slot].qtd == NULL)) + free_slot = curr_slot; + if (slots[curr_slot].qh == qh) + break; + } + + n = 0; + list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { + if (qtd->status == QTD_ENQUEUED) { + WARN_ON(qtd->payload_addr); + alloc_mem(hcd, qtd); + if ((qtd->length) && (!qtd->payload_addr)) + break; + + if ((qtd->length) && + ((qtd->packet_type == SETUP_PID) || + (qtd->packet_type == OUT_PID))) { + mem_writes8(hcd->regs, qtd->payload_addr, + qtd->data_buffer, qtd->length); + } + + qtd->status = QTD_PAYLOAD_ALLOC; + } + + if (qtd->status == QTD_PAYLOAD_ALLOC) { +/* + if ((curr_slot > 31) && (free_slot == -1)) + dev_dbg(hcd->self.controller, "%s: No slot " + "available for transfer\n", __func__); +*/ + /* Start xfer for this endpoint if not already done */ + if ((curr_slot > 31) && (free_slot > -1)) { + if (usb_pipeint(qtd->urb->pipe)) + create_ptd_int(qh, qtd, &ptd); + else + create_ptd_atl(qh, qtd, &ptd); + + start_bus_transfer(hcd, ptd_offset, free_slot, + slots, qtd, qh, &ptd); + curr_slot = free_slot; + } + + n++; + if (n >= ENQUEUE_DEPTH) + break; + } + } +} + +static void schedule_ptds(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv; + struct isp1760_qh *qh, *qh_next; + struct list_head *ep_queue; + LIST_HEAD(urb_list); + struct urb_listitem *urb_listitem, *urb_listitem_next; + int i; + + if (!hcd) { + WARN_ON(1); + return; + } + + priv = hcd_to_priv(hcd); + + /* + * check finished/retired xfers, transfer payloads, call urb_done() + */ + for (i = 0; i < QH_END; i++) { + ep_queue = &priv->qh_list[i]; + list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) { + collect_qtds(hcd, qh, &urb_list); + if (list_empty(&qh->qtd_list)) + list_del(&qh->qh_list); + } + } + + list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list, + urb_list) { + isp1760_urb_done(hcd, urb_listitem->urb); + kmem_cache_free(urb_listitem_cachep, urb_listitem); + } + + /* + * Schedule packets for transfer. + * + * According to USB2.0 specification: + * + * 1st prio: interrupt xfers, up to 80 % of bandwidth + * 2nd prio: control xfers + * 3rd prio: bulk xfers + * + * ... but let's use a simpler scheme here (mostly because ISP1761 doc + * is very unclear on how to prioritize traffic): + * + * 1) Enqueue any queued control transfers, as long as payload chip mem + * and PTD ATL slots are available. + * 2) Enqueue any queued INT transfers, as long as payload chip mem + * and PTD INT slots are available. + * 3) Enqueue any queued bulk transfers, as long as payload chip mem + * and PTD ATL slots are available. + * + * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between + * conservation of chip mem and performance. + * + * I'm sure this scheme could be improved upon! + */ + for (i = 0; i < QH_END; i++) { + ep_queue = &priv->qh_list[i]; + list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) + enqueue_qtds(hcd, qh); + } +} + +#define PTD_STATE_QTD_DONE 1 +#define PTD_STATE_QTD_RELOAD 2 +#define PTD_STATE_URB_RETIRE 3 + +static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd, + struct urb *urb) +{ + __dw dw4; + int i; + + dw4 = ptd->dw4; + dw4 >>= 8; + + /* FIXME: ISP1761 datasheet does not say what to do with these. Do we + need to handle these errors? Is it done in hardware? */ + + if (ptd->dw3 & DW3_HALT_BIT) { + + urb->status = -EPROTO; /* Default unknown error */ + + for (i = 0; i < 8; i++) { + switch (dw4 & 0x7) { + case INT_UNDERRUN: + dev_dbg(hcd->self.controller, "%s: underrun " + "during uFrame %d\n", + __func__, i); + urb->status = -ECOMM; /* Could not write data */ + break; + case INT_EXACT: + dev_dbg(hcd->self.controller, "%s: transaction " + "error during uFrame %d\n", + __func__, i); + urb->status = -EPROTO; /* timeout, bad CRC, PID + error etc. */ + break; + case INT_BABBLE: + dev_dbg(hcd->self.controller, "%s: babble " + "error during uFrame %d\n", + __func__, i); + urb->status = -EOVERFLOW; + break; + } + dw4 >>= 3; + } + + return PTD_STATE_URB_RETIRE; + } + + return PTD_STATE_QTD_DONE; +} + +static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd, + struct urb *urb) +{ + WARN_ON(!ptd); + if (ptd->dw3 & DW3_HALT_BIT) { + if (ptd->dw3 & DW3_BABBLE_BIT) + urb->status = -EOVERFLOW; + else if (FROM_DW3_CERR(ptd->dw3)) + urb->status = -EPIPE; /* Stall */ + else if (ptd->dw3 & DW3_ERROR_BIT) + urb->status = -EPROTO; /* XactErr */ + else + urb->status = -EPROTO; /* Unknown */ +/* + dev_dbg(hcd->self.controller, "%s: ptd error:\n" + " dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n" + " dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n", + __func__, + ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3, + ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7); +*/ + return PTD_STATE_URB_RETIRE; + } + + if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) { + /* Transfer Error, *but* active and no HALT -> reload */ + dev_dbg(hcd->self.controller, "PID error; reloading ptd\n"); + return PTD_STATE_QTD_RELOAD; + } + + if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) { + /* + * NAKs are handled in HW by the chip. Usually if the + * device is not able to send data fast enough. + * This happens mostly on slower hardware. + */ + return PTD_STATE_QTD_RELOAD; + } + + return PTD_STATE_QTD_DONE; +} + +static void handle_done_ptds(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + struct ptd ptd; + struct isp1760_qh *qh; + int slot; + int state; + struct isp1760_slotinfo *slots; + u32 ptd_offset; + struct isp1760_qtd *qtd; + int modified; + int skip_map; + + skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); + priv->int_done_map &= ~skip_map; + skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); + priv->atl_done_map &= ~skip_map; + + modified = priv->int_done_map || priv->atl_done_map; + + while (priv->int_done_map || priv->atl_done_map) { + if (priv->int_done_map) { + /* INT ptd */ + slot = __ffs(priv->int_done_map); + priv->int_done_map &= ~(1 << slot); + slots = priv->int_slots; + /* This should not trigger, and could be removed if + noone have any problems with it triggering: */ + if (!slots[slot].qh) { + WARN_ON(1); + continue; + } + ptd_offset = INT_PTD_OFFSET; + ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd); + state = check_int_transfer(hcd, &ptd, + slots[slot].qtd->urb); + } else { + /* ATL ptd */ + slot = __ffs(priv->atl_done_map); + priv->atl_done_map &= ~(1 << slot); + slots = priv->atl_slots; + /* This should not trigger, and could be removed if + noone have any problems with it triggering: */ + if (!slots[slot].qh) { + WARN_ON(1); + continue; + } + ptd_offset = ATL_PTD_OFFSET; + ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); + state = check_atl_transfer(hcd, &ptd, + slots[slot].qtd->urb); + } + + qtd = slots[slot].qtd; + slots[slot].qtd = NULL; + qh = slots[slot].qh; + slots[slot].qh = NULL; + qh->slot = -1; + + WARN_ON(qtd->status != QTD_XFER_STARTED); + + switch (state) { + case PTD_STATE_QTD_DONE: + if ((usb_pipeint(qtd->urb->pipe)) && + (qtd->urb->dev->speed != USB_SPEED_HIGH)) + qtd->actual_length = + FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3); + else + qtd->actual_length = + FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3); + + qtd->status = QTD_XFER_COMPLETE; + if (list_is_last(&qtd->qtd_list, &qh->qtd_list) || + is_short_bulk(qtd)) + qtd = NULL; + else + qtd = list_entry(qtd->qtd_list.next, + typeof(*qtd), qtd_list); + + qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); + qh->ping = FROM_DW3_PING(ptd.dw3); + break; + + case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */ + qtd->status = QTD_PAYLOAD_ALLOC; + ptd.dw0 |= DW0_VALID_BIT; + /* RL counter = ERR counter */ + ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf); + ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2)); + ptd.dw3 &= ~TO_DW3_CERR(3); + ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER); + qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); + qh->ping = FROM_DW3_PING(ptd.dw3); + break; + + case PTD_STATE_URB_RETIRE: + qtd->status = QTD_RETIRE; + if ((qtd->urb->dev->speed != USB_SPEED_HIGH) && + (qtd->urb->status != -EPIPE) && + (qtd->urb->status != -EREMOTEIO)) { + qh->tt_buffer_dirty = 1; + if (usb_hub_clear_tt_buffer(qtd->urb)) + /* Clear failed; let's hope things work + anyway */ + qh->tt_buffer_dirty = 0; + } + qtd = NULL; + qh->toggle = 0; + qh->ping = 0; + break; + + default: + WARN_ON(1); + continue; + } + + if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) { + if (slots == priv->int_slots) { + if (state == PTD_STATE_QTD_RELOAD) + dev_err(hcd->self.controller, + "%s: PTD_STATE_QTD_RELOAD on " + "interrupt packet\n", __func__); + if (state != PTD_STATE_QTD_RELOAD) + create_ptd_int(qh, qtd, &ptd); + } else { + if (state != PTD_STATE_QTD_RELOAD) + create_ptd_atl(qh, qtd, &ptd); + } + + start_bus_transfer(hcd, ptd_offset, slot, slots, qtd, + qh, &ptd); + } + } + + if (modified) + schedule_ptds(hcd); +} + +static irqreturn_t isp1760_irq(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + u32 imask; + irqreturn_t irqret = IRQ_NONE; + + spin_lock(&priv->lock); + + if (!(hcd->state & HC_STATE_RUNNING)) + goto leave; + + imask = reg_read32(hcd->regs, HC_INTERRUPT_REG); + if (unlikely(!imask)) + goto leave; + reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */ + + priv->int_done_map |= reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG); + priv->atl_done_map |= reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG); + + handle_done_ptds(hcd); + + irqret = IRQ_HANDLED; +leave: + spin_unlock(&priv->lock); + + return irqret; +} + +/* + * Workaround for problem described in chip errata 2: + * + * Sometimes interrupts are not generated when ATL (not INT?) completion occurs. + * One solution suggested in the errata is to use SOF interrupts _instead_of_ + * ATL done interrupts (the "instead of" might be important since it seems + * enabling ATL interrupts also causes the chip to sometimes - rarely - "forget" + * to set the PTD's done bit in addition to not generating an interrupt!). + * + * So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their + * done bit is not being set. This is bad - it blocks the endpoint until reboot. + * + * If we use SOF interrupts only, we get latency between ptd completion and the + * actual handling. This is very noticeable in testusb runs which takes several + * minutes longer without ATL interrupts. + * + * A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it + * finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the + * slot's ACTIVE and VALID bits. If these are not set, the ptd is considered + * completed and its done map bit is set. + * + * The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen + * not to cause too much lag when this HW bug occurs, while still hopefully + * ensuring that the check does not falsely trigger. + */ +#define SLOT_TIMEOUT 300 +#define SLOT_CHECK_PERIOD 200 +static struct timer_list errata2_timer; + +static void errata2_function(unsigned long data) +{ + struct usb_hcd *hcd = (struct usb_hcd *) data; + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int slot; + struct ptd ptd; + unsigned long spinflags; + + spin_lock_irqsave(&priv->lock, spinflags); + + for (slot = 0; slot < 32; slot++) + if (priv->atl_slots[slot].qh && time_after(jiffies, + priv->atl_slots[slot].timestamp + + SLOT_TIMEOUT * HZ / 1000)) { + ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); + if (!FROM_DW0_VALID(ptd.dw0) && + !FROM_DW3_ACTIVE(ptd.dw3)) + priv->atl_done_map |= 1 << slot; + } + + if (priv->atl_done_map) + handle_done_ptds(hcd); + + spin_unlock_irqrestore(&priv->lock, spinflags); + + errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; + add_timer(&errata2_timer); +} + +static int isp1760_run(struct usb_hcd *hcd) +{ + int retval; + u32 temp; + u32 command; + u32 chipid; + + hcd->uses_new_polling = 1; + + hcd->state = HC_STATE_RUNNING; + + /* Set PTD interrupt AND & OR maps */ + reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0); + reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff); + reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0); + reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff); + reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0); + reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff); + /* step 23 passed */ + + temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); + reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN); + + command = reg_read32(hcd->regs, HC_USBCMD); + command &= ~(CMD_LRESET|CMD_RESET); + command |= CMD_RUN; + reg_write32(hcd->regs, HC_USBCMD, command); + + retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000); + if (retval) + return retval; + + /* + * XXX + * Spec says to write FLAG_CF as last config action, priv code grabs + * the semaphore while doing so. + */ + down_write(&ehci_cf_port_reset_rwsem); + reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF); + + retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000); + up_write(&ehci_cf_port_reset_rwsem); + if (retval) + return retval; + + init_timer(&errata2_timer); + errata2_timer.function = errata2_function; + errata2_timer.data = (unsigned long) hcd; + errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; + add_timer(&errata2_timer); + + chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG); + dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n", + chipid & 0xffff, chipid >> 16); + + /* PTD Register Init Part 2, Step 28 */ + + /* Setup registers controlling PTD checking */ + reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000); + reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000); + reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001); + reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff); + reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff); + reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff); + reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, + ATL_BUF_FILL | INT_BUF_FILL); + + /* GRR this is run-once init(), being done every time the HC starts. + * So long as they're part of class devices, we can't do it init() + * since the class device isn't created that early. + */ + return 0; +} + +static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len) +{ + qtd->data_buffer = databuffer; + + if (len > MAX_PAYLOAD_SIZE) + len = MAX_PAYLOAD_SIZE; + qtd->length = len; + + return qtd->length; +} + +static void qtd_list_free(struct list_head *qtd_list) +{ + struct isp1760_qtd *qtd, *qtd_next; + + list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) { + list_del(&qtd->qtd_list); + qtd_free(qtd); + } +} + +/* + * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize. + * Also calculate the PID type (SETUP/IN/OUT) for each packet. + */ +#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) +static void packetize_urb(struct usb_hcd *hcd, + struct urb *urb, struct list_head *head, gfp_t flags) +{ + struct isp1760_qtd *qtd; + void *buf; + int len, maxpacketsize; + u8 packet_type; + + /* + * URBs map to sequences of QTDs: one logical transaction + */ + + if (!urb->transfer_buffer && urb->transfer_buffer_length) { + /* XXX This looks like usb storage / SCSI bug */ + dev_err(hcd->self.controller, + "buf is null, dma is %08lx len is %d\n", + (long unsigned)urb->transfer_dma, + urb->transfer_buffer_length); + WARN_ON(1); + } + + if (usb_pipein(urb->pipe)) + packet_type = IN_PID; + else + packet_type = OUT_PID; + + if (usb_pipecontrol(urb->pipe)) { + qtd = qtd_alloc(flags, urb, SETUP_PID); + if (!qtd) + goto cleanup; + qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest)); + list_add_tail(&qtd->qtd_list, head); + + /* for zero length DATA stages, STATUS is always IN */ + if (urb->transfer_buffer_length == 0) + packet_type = IN_PID; + } + + maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe, + usb_pipeout(urb->pipe))); + + /* + * buffer gets wrapped in one or more qtds; + * last one may be "short" (including zero len) + * and may serve as a control status ack + */ + buf = urb->transfer_buffer; + len = urb->transfer_buffer_length; + + for (;;) { + int this_qtd_len; + + qtd = qtd_alloc(flags, urb, packet_type); + if (!qtd) + goto cleanup; + this_qtd_len = qtd_fill(qtd, buf, len); + list_add_tail(&qtd->qtd_list, head); + + len -= this_qtd_len; + buf += this_qtd_len; + + if (len <= 0) + break; + } + + /* + * control requests may need a terminating data "status" ack; + * bulk ones may need a terminating short packet (zero length). + */ + if (urb->transfer_buffer_length != 0) { + int one_more = 0; + + if (usb_pipecontrol(urb->pipe)) { + one_more = 1; + if (packet_type == IN_PID) + packet_type = OUT_PID; + else + packet_type = IN_PID; + } else if (usb_pipebulk(urb->pipe) + && (urb->transfer_flags & URB_ZERO_PACKET) + && !(urb->transfer_buffer_length % + maxpacketsize)) { + one_more = 1; + } + if (one_more) { + qtd = qtd_alloc(flags, urb, packet_type); + if (!qtd) + goto cleanup; + + /* never any data in such packets */ + qtd_fill(qtd, NULL, 0); + list_add_tail(&qtd->qtd_list, head); + } + } + + return; + +cleanup: + qtd_list_free(head); +} + +static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + struct list_head *ep_queue; + struct isp1760_qh *qh, *qhit; + unsigned long spinflags; + LIST_HEAD(new_qtds); + int retval; + int qh_in_queue; + + switch (usb_pipetype(urb->pipe)) { + case PIPE_CONTROL: + ep_queue = &priv->qh_list[QH_CONTROL]; + break; + case PIPE_BULK: + ep_queue = &priv->qh_list[QH_BULK]; + break; + case PIPE_INTERRUPT: + if (urb->interval < 0) + return -EINVAL; + /* FIXME: Check bandwidth */ + ep_queue = &priv->qh_list[QH_INTERRUPT]; + break; + case PIPE_ISOCHRONOUS: + dev_err(hcd->self.controller, "%s: isochronous USB packets " + "not yet supported\n", + __func__); + return -EPIPE; + default: + dev_err(hcd->self.controller, "%s: unknown pipe type\n", + __func__); + return -EPIPE; + } + + if (usb_pipein(urb->pipe)) + urb->actual_length = 0; + + packetize_urb(hcd, urb, &new_qtds, mem_flags); + if (list_empty(&new_qtds)) + return -ENOMEM; + + retval = 0; + spin_lock_irqsave(&priv->lock, spinflags); + + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + retval = -ESHUTDOWN; + qtd_list_free(&new_qtds); + goto out; + } + retval = usb_hcd_link_urb_to_ep(hcd, urb); + if (retval) { + qtd_list_free(&new_qtds); + goto out; + } + + qh = urb->ep->hcpriv; + if (qh) { + qh_in_queue = 0; + list_for_each_entry(qhit, ep_queue, qh_list) { + if (qhit == qh) { + qh_in_queue = 1; + break; + } + } + if (!qh_in_queue) + list_add_tail(&qh->qh_list, ep_queue); + } else { + qh = qh_alloc(GFP_ATOMIC); + if (!qh) { + retval = -ENOMEM; + usb_hcd_unlink_urb_from_ep(hcd, urb); + qtd_list_free(&new_qtds); + goto out; + } + list_add_tail(&qh->qh_list, ep_queue); + urb->ep->hcpriv = qh; + } + + list_splice_tail(&new_qtds, &qh->qtd_list); + schedule_ptds(hcd); + +out: + spin_unlock_irqrestore(&priv->lock, spinflags); + return retval; +} + +static void kill_transfer(struct usb_hcd *hcd, struct urb *urb, + struct isp1760_qh *qh) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int skip_map; + + WARN_ON(qh->slot == -1); + + /* We need to forcefully reclaim the slot since some transfers never + return, e.g. interrupt transfers and NAKed bulk transfers. */ + if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) { + skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); + skip_map |= (1 << qh->slot); + reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); + priv->atl_slots[qh->slot].qh = NULL; + priv->atl_slots[qh->slot].qtd = NULL; + } else { + skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); + skip_map |= (1 << qh->slot); + reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); + priv->int_slots[qh->slot].qh = NULL; + priv->int_slots[qh->slot].qtd = NULL; + } + + qh->slot = -1; +} + +/* + * Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing + * any active transfer belonging to the urb in the process. + */ +static void dequeue_urb_from_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh, + struct isp1760_qtd *qtd) +{ + struct urb *urb; + int urb_was_running; + + urb = qtd->urb; + urb_was_running = 0; + list_for_each_entry_from(qtd, &qh->qtd_list, qtd_list) { + if (qtd->urb != urb) + break; + + if (qtd->status >= QTD_XFER_STARTED) + urb_was_running = 1; + if (last_qtd_of_urb(qtd, qh) && + (qtd->status >= QTD_XFER_COMPLETE)) + urb_was_running = 0; + + if (qtd->status == QTD_XFER_STARTED) + kill_transfer(hcd, urb, qh); + qtd->status = QTD_RETIRE; + } + + if ((urb->dev->speed != USB_SPEED_HIGH) && urb_was_running) { + qh->tt_buffer_dirty = 1; + if (usb_hub_clear_tt_buffer(urb)) + /* Clear failed; let's hope things work anyway */ + qh->tt_buffer_dirty = 0; + } +} + +static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, + int status) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + unsigned long spinflags; + struct isp1760_qh *qh; + struct isp1760_qtd *qtd; + int retval = 0; + + spin_lock_irqsave(&priv->lock, spinflags); + retval = usb_hcd_check_unlink_urb(hcd, urb, status); + if (retval) + goto out; + + qh = urb->ep->hcpriv; + if (!qh) { + retval = -EINVAL; + goto out; + } + + list_for_each_entry(qtd, &qh->qtd_list, qtd_list) + if (qtd->urb == urb) { + dequeue_urb_from_qtd(hcd, qh, qtd); + list_move(&qtd->qtd_list, &qh->qtd_list); + break; + } + + urb->status = status; + schedule_ptds(hcd); + +out: + spin_unlock_irqrestore(&priv->lock, spinflags); + return retval; +} + +static void isp1760_endpoint_disable(struct usb_hcd *hcd, + struct usb_host_endpoint *ep) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + unsigned long spinflags; + struct isp1760_qh *qh, *qh_iter; + int i; + + spin_lock_irqsave(&priv->lock, spinflags); + + qh = ep->hcpriv; + if (!qh) + goto out; + + WARN_ON(!list_empty(&qh->qtd_list)); + + for (i = 0; i < QH_END; i++) + list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list) + if (qh_iter == qh) { + list_del(&qh_iter->qh_list); + i = QH_END; + break; + } + qh_free(qh); + ep->hcpriv = NULL; + + schedule_ptds(hcd); + +out: + spin_unlock_irqrestore(&priv->lock, spinflags); +} + +static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + u32 temp, status = 0; + u32 mask; + int retval = 1; + unsigned long flags; + + /* if !PM, root hub timers won't get shut down ... */ + if (!HC_IS_RUNNING(hcd->state)) + return 0; + + /* init status to no-changes */ + buf[0] = 0; + mask = PORT_CSC; + + spin_lock_irqsave(&priv->lock, flags); + temp = reg_read32(hcd->regs, HC_PORTSC1); + + if (temp & PORT_OWNER) { + if (temp & PORT_CSC) { + temp &= ~PORT_CSC; + reg_write32(hcd->regs, HC_PORTSC1, temp); + goto done; + } + } + + /* + * Return status information even for ports with OWNER set. + * Otherwise hub_wq wouldn't see the disconnect event when a + * high-speed device is switched over to the companion + * controller by the user. + */ + + if ((temp & mask) != 0 + || ((temp & PORT_RESUME) != 0 + && time_after_eq(jiffies, + priv->reset_done))) { + buf [0] |= 1 << (0 + 1); + status = STS_PCD; + } + /* FIXME autosuspend idle root hubs */ +done: + spin_unlock_irqrestore(&priv->lock, flags); + return status ? retval : 0; +} + +static void isp1760_hub_descriptor(struct isp1760_hcd *priv, + struct usb_hub_descriptor *desc) +{ + int ports = HCS_N_PORTS(priv->hcs_params); + u16 temp; + + desc->bDescriptorType = 0x29; + /* priv 1.0, 2.3.9 says 20ms max */ + desc->bPwrOn2PwrGood = 10; + desc->bHubContrCurrent = 0; + + desc->bNbrPorts = ports; + temp = 1 + (ports / 8); + desc->bDescLength = 7 + 2 * temp; + + /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ + memset(&desc->u.hs.DeviceRemovable[0], 0, temp); + memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); + + /* per-port overcurrent reporting */ + temp = 0x0008; + if (HCS_PPC(priv->hcs_params)) + /* per-port power control */ + temp |= 0x0001; + else + /* no power switching */ + temp |= 0x0002; + desc->wHubCharacteristics = cpu_to_le16(temp); +} + +#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) + +static int check_reset_complete(struct usb_hcd *hcd, int index, + int port_status) +{ + if (!(port_status & PORT_CONNECT)) + return port_status; + + /* if reset finished and it's still not enabled -- handoff */ + if (!(port_status & PORT_PE)) { + + dev_info(hcd->self.controller, + "port %d full speed --> companion\n", + index + 1); + + port_status |= PORT_OWNER; + port_status &= ~PORT_RWC_BITS; + reg_write32(hcd->regs, HC_PORTSC1, port_status); + + } else + dev_info(hcd->self.controller, "port %d high speed\n", + index + 1); + + return port_status; +} + +static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int ports = HCS_N_PORTS(priv->hcs_params); + u32 temp, status; + unsigned long flags; + int retval = 0; + unsigned selector; + + /* + * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. + * HCS_INDICATOR may say we can change LEDs to off/amber/green. + * (track current state ourselves) ... blink for diagnostics, + * power, "this is the one", etc. EHCI spec supports this. + */ + + spin_lock_irqsave(&priv->lock, flags); + switch (typeReq) { + case ClearHubFeature: + switch (wValue) { + case C_HUB_LOCAL_POWER: + case C_HUB_OVER_CURRENT: + /* no hub-wide feature/status flags */ + break; + default: + goto error; + } + break; + case ClearPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + temp = reg_read32(hcd->regs, HC_PORTSC1); + + /* + * Even if OWNER is set, so the port is owned by the + * companion controller, hub_wq needs to be able to clear + * the port-change status bits (especially + * USB_PORT_STAT_C_CONNECTION). + */ + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE); + break; + case USB_PORT_FEAT_C_ENABLE: + /* XXX error? */ + break; + case USB_PORT_FEAT_SUSPEND: + if (temp & PORT_RESET) + goto error; + + if (temp & PORT_SUSPEND) { + if ((temp & PORT_PE) == 0) + goto error; + /* resume signaling for 20 msec */ + temp &= ~(PORT_RWC_BITS); + reg_write32(hcd->regs, HC_PORTSC1, + temp | PORT_RESUME); + priv->reset_done = jiffies + + msecs_to_jiffies(20); + } + break; + case USB_PORT_FEAT_C_SUSPEND: + /* we auto-clear this feature */ + break; + case USB_PORT_FEAT_POWER: + if (HCS_PPC(priv->hcs_params)) + reg_write32(hcd->regs, HC_PORTSC1, + temp & ~PORT_POWER); + break; + case USB_PORT_FEAT_C_CONNECTION: + reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC); + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + /* XXX error ?*/ + break; + case USB_PORT_FEAT_C_RESET: + /* GetPortStatus clears reset */ + break; + default: + goto error; + } + reg_read32(hcd->regs, HC_USBCMD); + break; + case GetHubDescriptor: + isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *) + buf); + break; + case GetHubStatus: + /* no hub-wide feature/status flags */ + memset(buf, 0, 4); + break; + case GetPortStatus: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + status = 0; + temp = reg_read32(hcd->regs, HC_PORTSC1); + + /* wPortChange bits */ + if (temp & PORT_CSC) + status |= USB_PORT_STAT_C_CONNECTION << 16; + + + /* whoever resumes must GetPortStatus to complete it!! */ + if (temp & PORT_RESUME) { + dev_err(hcd->self.controller, "Port resume should be skipped.\n"); + + /* Remote Wakeup received? */ + if (!priv->reset_done) { + /* resume signaling for 20 msec */ + priv->reset_done = jiffies + + msecs_to_jiffies(20); + /* check the port again */ + mod_timer(&hcd->rh_timer, priv->reset_done); + } + + /* resume completed? */ + else if (time_after_eq(jiffies, + priv->reset_done)) { + status |= USB_PORT_STAT_C_SUSPEND << 16; + priv->reset_done = 0; + + /* stop resume signaling */ + temp = reg_read32(hcd->regs, HC_PORTSC1); + reg_write32(hcd->regs, HC_PORTSC1, + temp & ~(PORT_RWC_BITS | PORT_RESUME)); + retval = handshake(hcd, HC_PORTSC1, + PORT_RESUME, 0, 2000 /* 2msec */); + if (retval != 0) { + dev_err(hcd->self.controller, + "port %d resume error %d\n", + wIndex + 1, retval); + goto error; + } + temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); + } + } + + /* whoever resets must GetPortStatus to complete it!! */ + if ((temp & PORT_RESET) + && time_after_eq(jiffies, + priv->reset_done)) { + status |= USB_PORT_STAT_C_RESET << 16; + priv->reset_done = 0; + + /* force reset to complete */ + reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET); + /* REVISIT: some hardware needs 550+ usec to clear + * this bit; seems too long to spin routinely... + */ + retval = handshake(hcd, HC_PORTSC1, + PORT_RESET, 0, 750); + if (retval != 0) { + dev_err(hcd->self.controller, "port %d reset error %d\n", + wIndex + 1, retval); + goto error; + } + + /* see what we found out */ + temp = check_reset_complete(hcd, wIndex, + reg_read32(hcd->regs, HC_PORTSC1)); + } + /* + * Even if OWNER is set, there's no harm letting hub_wq + * see the wPortStatus values (they should all be 0 except + * for PORT_POWER anyway). + */ + + if (temp & PORT_OWNER) + dev_err(hcd->self.controller, "PORT_OWNER is set\n"); + + if (temp & PORT_CONNECT) { + status |= USB_PORT_STAT_CONNECTION; + /* status may be from integrated TT */ + status |= USB_PORT_STAT_HIGH_SPEED; + } + if (temp & PORT_PE) + status |= USB_PORT_STAT_ENABLE; + if (temp & (PORT_SUSPEND|PORT_RESUME)) + status |= USB_PORT_STAT_SUSPEND; + if (temp & PORT_RESET) + status |= USB_PORT_STAT_RESET; + if (temp & PORT_POWER) + status |= USB_PORT_STAT_POWER; + + put_unaligned(cpu_to_le32(status), (__le32 *) buf); + break; + case SetHubFeature: + switch (wValue) { + case C_HUB_LOCAL_POWER: + case C_HUB_OVER_CURRENT: + /* no hub-wide feature/status flags */ + break; + default: + goto error; + } + break; + case SetPortFeature: + selector = wIndex >> 8; + wIndex &= 0xff; + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + temp = reg_read32(hcd->regs, HC_PORTSC1); + if (temp & PORT_OWNER) + break; + +/* temp &= ~PORT_RWC_BITS; */ + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE); + break; + + case USB_PORT_FEAT_SUSPEND: + if ((temp & PORT_PE) == 0 + || (temp & PORT_RESET) != 0) + goto error; + + reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND); + break; + case USB_PORT_FEAT_POWER: + if (HCS_PPC(priv->hcs_params)) + reg_write32(hcd->regs, HC_PORTSC1, + temp | PORT_POWER); + break; + case USB_PORT_FEAT_RESET: + if (temp & PORT_RESUME) + goto error; + /* line status bits may report this as low speed, + * which can be fine if this root hub has a + * transaction translator built in. + */ + if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT + && PORT_USB11(temp)) { + temp |= PORT_OWNER; + } else { + temp |= PORT_RESET; + temp &= ~PORT_PE; + + /* + * caller must wait, then call GetPortStatus + * usb 2.0 spec says 50 ms resets on root + */ + priv->reset_done = jiffies + + msecs_to_jiffies(50); + } + reg_write32(hcd->regs, HC_PORTSC1, temp); + break; + default: + goto error; + } + reg_read32(hcd->regs, HC_USBCMD); + break; + + default: +error: + /* "stall" on error */ + retval = -EPIPE; + } + spin_unlock_irqrestore(&priv->lock, flags); + return retval; +} + +static int isp1760_get_frame(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + u32 fr; + + fr = reg_read32(hcd->regs, HC_FRINDEX); + return (fr >> 3) % priv->periodic_size; +} + +static void isp1760_stop(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + u32 temp; + + del_timer(&errata2_timer); + + isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1, + NULL, 0); + mdelay(20); + + spin_lock_irq(&priv->lock); + ehci_reset(hcd); + /* Disable IRQ */ + temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); + reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); + spin_unlock_irq(&priv->lock); + + reg_write32(hcd->regs, HC_CONFIGFLAG, 0); +} + +static void isp1760_shutdown(struct usb_hcd *hcd) +{ + u32 command, temp; + + isp1760_stop(hcd); + temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); + reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); + + command = reg_read32(hcd->regs, HC_USBCMD); + command &= ~CMD_RUN; + reg_write32(hcd->regs, HC_USBCMD, command); +} + +static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd, + struct usb_host_endpoint *ep) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + struct isp1760_qh *qh = ep->hcpriv; + unsigned long spinflags; + + if (!qh) + return; + + spin_lock_irqsave(&priv->lock, spinflags); + qh->tt_buffer_dirty = 0; + schedule_ptds(hcd); + spin_unlock_irqrestore(&priv->lock, spinflags); +} + + +static const struct hc_driver isp1760_hc_driver = { + .description = "isp1760-hcd", + .product_desc = "NXP ISP1760 USB Host Controller", + .hcd_priv_size = sizeof(struct isp1760_hcd *), + .irq = isp1760_irq, + .flags = HCD_MEMORY | HCD_USB2, + .reset = isp1760_hc_setup, + .start = isp1760_run, + .stop = isp1760_stop, + .shutdown = isp1760_shutdown, + .urb_enqueue = isp1760_urb_enqueue, + .urb_dequeue = isp1760_urb_dequeue, + .endpoint_disable = isp1760_endpoint_disable, + .get_frame_number = isp1760_get_frame, + .hub_status_data = isp1760_hub_status_data, + .hub_control = isp1760_hub_control, + .clear_tt_buffer_complete = isp1760_clear_tt_buffer_complete, +}; + +int __init isp1760_init_kmem_once(void) +{ + urb_listitem_cachep = kmem_cache_create("isp1760_urb_listitem", + sizeof(struct urb_listitem), 0, SLAB_TEMPORARY | + SLAB_MEM_SPREAD, NULL); + + if (!urb_listitem_cachep) + return -ENOMEM; + + qtd_cachep = kmem_cache_create("isp1760_qtd", + sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY | + SLAB_MEM_SPREAD, NULL); + + if (!qtd_cachep) + return -ENOMEM; + + qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh), + 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL); + + if (!qh_cachep) { + kmem_cache_destroy(qtd_cachep); + return -ENOMEM; + } + + return 0; +} + +void isp1760_deinit_kmem_cache(void) +{ + kmem_cache_destroy(qtd_cachep); + kmem_cache_destroy(qh_cachep); + kmem_cache_destroy(urb_listitem_cachep); +} + +int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs, + struct resource *mem, int irq, unsigned long irqflags, + struct device *dev) +{ + struct usb_hcd *hcd; + int ret; + + hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev)); + if (!hcd) + return -ENOMEM; + + *(struct isp1760_hcd **)hcd->hcd_priv = priv; + + priv->hcd = hcd; + + init_memory(priv); + + hcd->irq = irq; + hcd->regs = regs; + hcd->rsrc_start = mem->start; + hcd->rsrc_len = resource_size(mem); + + ret = usb_add_hcd(hcd, irq, irqflags); + if (ret) + goto error; + + device_wakeup_enable(hcd->self.controller); + + return 0; + +error: + usb_put_hcd(hcd); + return ret; +} + +void isp1760_hcd_unregister(struct isp1760_hcd *priv) +{ + usb_remove_hcd(priv->hcd); + usb_put_hcd(priv->hcd); +} diff --git a/drivers/usb/isp1760/isp1760-hcd.h b/drivers/usb/isp1760/isp1760-hcd.h new file mode 100644 index 000000000000..df7ea3684b77 --- /dev/null +++ b/drivers/usb/isp1760/isp1760-hcd.h @@ -0,0 +1,77 @@ +#ifndef _ISP1760_HCD_H_ +#define _ISP1760_HCD_H_ + +#include + +struct isp1760_qh; +struct isp1760_qtd; +struct resource; +struct usb_hcd; + +/* + * 60kb divided in: + * - 32 blocks @ 256 bytes + * - 20 blocks @ 1024 bytes + * - 4 blocks @ 8192 bytes + */ + +#define BLOCK_1_NUM 32 +#define BLOCK_2_NUM 20 +#define BLOCK_3_NUM 4 + +#define BLOCK_1_SIZE 256 +#define BLOCK_2_SIZE 1024 +#define BLOCK_3_SIZE 8192 +#define BLOCKS (BLOCK_1_NUM + BLOCK_2_NUM + BLOCK_3_NUM) +#define MAX_PAYLOAD_SIZE BLOCK_3_SIZE +#define PAYLOAD_AREA_SIZE 0xf000 + +struct isp1760_slotinfo { + struct isp1760_qh *qh; + struct isp1760_qtd *qtd; + unsigned long timestamp; +}; + +/* chip memory management */ +struct isp1760_memory_chunk { + unsigned int start; + unsigned int size; + unsigned int free; +}; + +enum isp1760_queue_head_types { + QH_CONTROL, + QH_BULK, + QH_INTERRUPT, + QH_END +}; + +struct isp1760_hcd { + struct usb_hcd *hcd; + + u32 hcs_params; + spinlock_t lock; + struct isp1760_slotinfo atl_slots[32]; + int atl_done_map; + struct isp1760_slotinfo int_slots[32]; + int int_done_map; + struct isp1760_memory_chunk memory_pool[BLOCKS]; + struct list_head qh_list[QH_END]; + + /* periodic schedule support */ +#define DEFAULT_I_TDPS 1024 + unsigned periodic_size; + unsigned i_thresh; + unsigned long reset_done; + unsigned long next_statechange; +}; + +int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs, + struct resource *mem, int irq, unsigned long irqflags, + struct device *dev); +void isp1760_hcd_unregister(struct isp1760_hcd *priv); + +int isp1760_init_kmem_once(void); +void isp1760_deinit_kmem_cache(void); + +#endif /* _ISP1760_HCD_H_ */ diff --git a/drivers/usb/isp1760/isp1760-if.c b/drivers/usb/isp1760/isp1760-if.c new file mode 100644 index 000000000000..c2a94c966350 --- /dev/null +++ b/drivers/usb/isp1760/isp1760-if.c @@ -0,0 +1,312 @@ +/* + * Glue code for the ISP1760 driver and bus + * Currently there is support for + * - OpenFirmware + * - PCI + * - PDEV (generic platform device centralized driver model) + * + * (c) 2007 Sebastian Siewior + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "isp1760-core.h" +#include "isp1760-regs.h" + +#ifdef CONFIG_PCI +#include +#endif + +#ifdef CONFIG_PCI +static int isp1761_pci_init(struct pci_dev *dev) +{ + resource_size_t mem_start; + resource_size_t mem_length; + u8 __iomem *iobase; + u8 latency, limit; + int retry_count; + u32 reg_data; + + /* Grab the PLX PCI shared memory of the ISP 1761 we need */ + mem_start = pci_resource_start(dev, 3); + mem_length = pci_resource_len(dev, 3); + if (mem_length < 0xffff) { + printk(KERN_ERR "memory length for this resource is wrong\n"); + return -ENOMEM; + } + + if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) { + printk(KERN_ERR "host controller already in use\n"); + return -EBUSY; + } + + /* map available memory */ + iobase = ioremap_nocache(mem_start, mem_length); + if (!iobase) { + printk(KERN_ERR "Error ioremap failed\n"); + release_mem_region(mem_start, mem_length); + return -ENOMEM; + } + + /* bad pci latencies can contribute to overruns */ + pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency); + if (latency) { + pci_read_config_byte(dev, PCI_MAX_LAT, &limit); + if (limit && limit < latency) + pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit); + } + + /* Try to check whether we can access Scratch Register of + * Host Controller or not. The initial PCI access is retried until + * local init for the PCI bridge is completed + */ + retry_count = 20; + reg_data = 0; + while ((reg_data != 0xFACE) && retry_count) { + /*by default host is in 16bit mode, so + * io operations at this stage must be 16 bit + * */ + writel(0xface, iobase + HC_SCRATCH_REG); + udelay(100); + reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff; + retry_count--; + } + + iounmap(iobase); + release_mem_region(mem_start, mem_length); + + /* Host Controller presence is detected by writing to scratch register + * and reading back and checking the contents are same or not + */ + if (reg_data != 0xFACE) { + dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data); + return -ENOMEM; + } + + /* Grab the PLX PCI mem maped port start address we need */ + mem_start = pci_resource_start(dev, 0); + mem_length = pci_resource_len(dev, 0); + + if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) { + printk(KERN_ERR "request region #1\n"); + return -EBUSY; + } + + iobase = ioremap_nocache(mem_start, mem_length); + if (!iobase) { + printk(KERN_ERR "ioremap #1\n"); + release_mem_region(mem_start, mem_length); + return -ENOMEM; + } + + /* configure PLX PCI chip to pass interrupts */ +#define PLX_INT_CSR_REG 0x68 + reg_data = readl(iobase + PLX_INT_CSR_REG); + reg_data |= 0x900; + writel(reg_data, iobase + PLX_INT_CSR_REG); + + /* done with PLX IO access */ + iounmap(iobase); + release_mem_region(mem_start, mem_length); + + return 0; +} + +static int isp1761_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + unsigned int devflags = 0; + int ret; + + if (usb_disabled()) + return -ENODEV; + + if (!dev->irq) + return -ENODEV; + + if (pci_enable_device(dev) < 0) + return -ENODEV; + + ret = isp1761_pci_init(dev); + if (ret < 0) + goto error; + + pci_set_master(dev); + + dev->dev.dma_mask = NULL; + ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev, + devflags); + if (ret < 0) + goto error; + + return 0; + +error: + pci_disable_device(dev); + return ret; +} + +static void isp1761_pci_remove(struct pci_dev *dev) +{ + isp1760_unregister(&dev->dev); + + pci_disable_device(dev); +} + +static void isp1761_pci_shutdown(struct pci_dev *dev) +{ + printk(KERN_ERR "ips1761_pci_shutdown\n"); +} + +static const struct pci_device_id isp1760_plx [] = { + { + .class = PCI_CLASS_BRIDGE_OTHER << 8, + .class_mask = ~0, + .vendor = PCI_VENDOR_ID_PLX, + .device = 0x5406, + .subvendor = PCI_VENDOR_ID_PLX, + .subdevice = 0x9054, + }, + { } +}; +MODULE_DEVICE_TABLE(pci, isp1760_plx); + +static struct pci_driver isp1761_pci_driver = { + .name = "isp1760", + .id_table = isp1760_plx, + .probe = isp1761_pci_probe, + .remove = isp1761_pci_remove, + .shutdown = isp1761_pci_shutdown, +}; +#endif + +static int isp1760_plat_probe(struct platform_device *pdev) +{ + unsigned long irqflags; + unsigned int devflags = 0; + struct resource *mem_res; + struct resource *irq_res; + int ret; + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!irq_res) { + pr_warning("isp1760: IRQ resource not available\n"); + return -ENODEV; + } + irqflags = irq_res->flags & IRQF_TRIGGER_MASK; + + if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { + struct device_node *dp = pdev->dev.of_node; + u32 bus_width = 0; + + if (of_device_is_compatible(dp, "nxp,usb-isp1761")) + devflags |= ISP1760_FLAG_ISP1761; + + /* Some systems wire up only 16 of the 32 data lines */ + of_property_read_u32(dp, "bus-width", &bus_width); + if (bus_width == 16) + devflags |= ISP1760_FLAG_BUS_WIDTH_16; + + if (of_property_read_bool(dp, "port1-otg")) + devflags |= ISP1760_FLAG_OTG_EN; + + if (of_property_read_bool(dp, "analog-oc")) + devflags |= ISP1760_FLAG_ANALOG_OC; + + if (of_property_read_bool(dp, "dack-polarity")) + devflags |= ISP1760_FLAG_DACK_POL_HIGH; + + if (of_property_read_bool(dp, "dreq-polarity")) + devflags |= ISP1760_FLAG_DREQ_POL_HIGH; + } else if (dev_get_platdata(&pdev->dev)) { + struct isp1760_platform_data *pdata = + dev_get_platdata(&pdev->dev); + + if (pdata->is_isp1761) + devflags |= ISP1760_FLAG_ISP1761; + if (pdata->bus_width_16) + devflags |= ISP1760_FLAG_BUS_WIDTH_16; + if (pdata->port1_otg) + devflags |= ISP1760_FLAG_OTG_EN; + if (pdata->analog_oc) + devflags |= ISP1760_FLAG_ANALOG_OC; + if (pdata->dack_polarity_high) + devflags |= ISP1760_FLAG_DACK_POL_HIGH; + if (pdata->dreq_polarity_high) + devflags |= ISP1760_FLAG_DREQ_POL_HIGH; + } + + ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev, + devflags); + if (ret < 0) + return ret; + + pr_info("ISP1760 USB device initialised\n"); + return 0; +} + +static int isp1760_plat_remove(struct platform_device *pdev) +{ + isp1760_unregister(&pdev->dev); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id isp1760_of_match[] = { + { .compatible = "nxp,usb-isp1760", }, + { .compatible = "nxp,usb-isp1761", }, + { }, +}; +MODULE_DEVICE_TABLE(of, isp1760_of_match); +#endif + +static struct platform_driver isp1760_plat_driver = { + .probe = isp1760_plat_probe, + .remove = isp1760_plat_remove, + .driver = { + .name = "isp1760", + .of_match_table = of_match_ptr(isp1760_of_match), + }, +}; + +static int __init isp1760_init(void) +{ + int ret, any_ret = -ENODEV; + + isp1760_init_kmem_once(); + + ret = platform_driver_register(&isp1760_plat_driver); + if (!ret) + any_ret = 0; +#ifdef CONFIG_PCI + ret = pci_register_driver(&isp1761_pci_driver); + if (!ret) + any_ret = 0; +#endif + + if (any_ret) + isp1760_deinit_kmem_cache(); + return any_ret; +} +module_init(isp1760_init); + +static void __exit isp1760_exit(void) +{ + platform_driver_unregister(&isp1760_plat_driver); +#ifdef CONFIG_PCI + pci_unregister_driver(&isp1761_pci_driver); +#endif + isp1760_deinit_kmem_cache(); +} +module_exit(isp1760_exit); diff --git a/drivers/usb/isp1760/isp1760-regs.h b/drivers/usb/isp1760/isp1760-regs.h new file mode 100644 index 000000000000..b67095c9a9d4 --- /dev/null +++ b/drivers/usb/isp1760/isp1760-regs.h @@ -0,0 +1,230 @@ +/* + * Driver for the NXP ISP1760 chip + * + * Copyright 2014 Laurent Pinchart + * Copyright 2007 Sebastian Siewior + * + * Contacts: + * Sebastian Siewior + * Laurent Pinchart + * + * 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. + */ + +#ifndef _ISP1760_REGS_H_ +#define _ISP1760_REGS_H_ + +/* ----------------------------------------------------------------------------- + * Host Controller + */ + +/* EHCI capability registers */ +#define HC_CAPLENGTH 0x000 +#define HC_LENGTH(p) (((p) >> 00) & 0x00ff) /* bits 7:0 */ +#define HC_VERSION(p) (((p) >> 16) & 0xffff) /* bits 31:16 */ + +#define HC_HCSPARAMS 0x004 +#define HCS_INDICATOR(p) ((p) & (1 << 16)) /* true: has port indicators */ +#define HCS_PPC(p) ((p) & (1 << 4)) /* true: port power control */ +#define HCS_N_PORTS(p) (((p) >> 0) & 0xf) /* bits 3:0, ports on HC */ + +#define HC_HCCPARAMS 0x008 +#define HCC_ISOC_CACHE(p) ((p) & (1 << 7)) /* true: can cache isoc frame */ +#define HCC_ISOC_THRES(p) (((p) >> 4) & 0x7) /* bits 6:4, uframes cached */ + +/* EHCI operational registers */ +#define HC_USBCMD 0x020 +#define CMD_LRESET (1 << 7) /* partial reset (no ports, etc) */ +#define CMD_RESET (1 << 1) /* reset HC not bus */ +#define CMD_RUN (1 << 0) /* start/stop HC */ + +#define HC_USBSTS 0x024 +#define STS_PCD (1 << 2) /* port change detect */ + +#define HC_FRINDEX 0x02c + +#define HC_CONFIGFLAG 0x060 +#define FLAG_CF (1 << 0) /* true: we'll support "high speed" */ + +#define HC_PORTSC1 0x064 +#define PORT_OWNER (1 << 13) /* true: companion hc owns this port */ +#define PORT_POWER (1 << 12) /* true: has power (see PPC) */ +#define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */ +#define PORT_RESET (1 << 8) /* reset port */ +#define PORT_SUSPEND (1 << 7) /* suspend port */ +#define PORT_RESUME (1 << 6) /* resume it */ +#define PORT_PE (1 << 2) /* port enable */ +#define PORT_CSC (1 << 1) /* connect status change */ +#define PORT_CONNECT (1 << 0) /* device connected */ +#define PORT_RWC_BITS (PORT_CSC) + +#define HC_ISO_PTD_DONEMAP_REG 0x130 +#define HC_ISO_PTD_SKIPMAP_REG 0x134 +#define HC_ISO_PTD_LASTPTD_REG 0x138 +#define HC_INT_PTD_DONEMAP_REG 0x140 +#define HC_INT_PTD_SKIPMAP_REG 0x144 +#define HC_INT_PTD_LASTPTD_REG 0x148 +#define HC_ATL_PTD_DONEMAP_REG 0x150 +#define HC_ATL_PTD_SKIPMAP_REG 0x154 +#define HC_ATL_PTD_LASTPTD_REG 0x158 + +/* Configuration Register */ +#define HC_HW_MODE_CTRL 0x300 +#define ALL_ATX_RESET (1 << 31) +#define HW_ANA_DIGI_OC (1 << 15) +#define HW_DEV_DMA (1 << 11) +#define HW_COMN_IRQ (1 << 10) +#define HW_COMN_DMA (1 << 9) +#define HW_DATA_BUS_32BIT (1 << 8) +#define HW_DACK_POL_HIGH (1 << 6) +#define HW_DREQ_POL_HIGH (1 << 5) +#define HW_INTR_HIGH_ACT (1 << 2) +#define HW_INTR_EDGE_TRIG (1 << 1) +#define HW_GLOBAL_INTR_EN (1 << 0) + +#define HC_CHIP_ID_REG 0x304 +#define HC_SCRATCH_REG 0x308 + +#define HC_RESET_REG 0x30c +#define SW_RESET_RESET_HC (1 << 1) +#define SW_RESET_RESET_ALL (1 << 0) + +#define HC_BUFFER_STATUS_REG 0x334 +#define ISO_BUF_FILL (1 << 2) +#define INT_BUF_FILL (1 << 1) +#define ATL_BUF_FILL (1 << 0) + +#define HC_MEMORY_REG 0x33c +#define ISP_BANK(x) ((x) << 16) + +#define HC_PORT1_CTRL 0x374 +#define PORT1_POWER (3 << 3) +#define PORT1_INIT1 (1 << 7) +#define PORT1_INIT2 (1 << 23) +#define HW_OTG_CTRL_SET 0x374 +#define HW_OTG_CTRL_CLR 0x376 +#define HW_OTG_DISABLE (1 << 10) +#define HW_OTG_SE0_EN (1 << 9) +#define HW_BDIS_ACON_EN (1 << 8) +#define HW_SW_SEL_HC_DC (1 << 7) +#define HW_VBUS_CHRG (1 << 6) +#define HW_VBUS_DISCHRG (1 << 5) +#define HW_VBUS_DRV (1 << 4) +#define HW_SEL_CP_EXT (1 << 3) +#define HW_DM_PULLDOWN (1 << 2) +#define HW_DP_PULLDOWN (1 << 1) +#define HW_DP_PULLUP (1 << 0) + +/* Interrupt Register */ +#define HC_INTERRUPT_REG 0x310 + +#define HC_INTERRUPT_ENABLE 0x314 +#define HC_ISO_INT (1 << 9) +#define HC_ATL_INT (1 << 8) +#define HC_INTL_INT (1 << 7) +#define HC_EOT_INT (1 << 3) +#define HC_SOT_INT (1 << 1) +#define INTERRUPT_ENABLE_MASK (HC_INTL_INT | HC_ATL_INT) + +#define HC_ISO_IRQ_MASK_OR_REG 0x318 +#define HC_INT_IRQ_MASK_OR_REG 0x31c +#define HC_ATL_IRQ_MASK_OR_REG 0x320 +#define HC_ISO_IRQ_MASK_AND_REG 0x324 +#define HC_INT_IRQ_MASK_AND_REG 0x328 +#define HC_ATL_IRQ_MASK_AND_REG 0x32c + +/* ----------------------------------------------------------------------------- + * Peripheral Controller + */ + +/* Initialization Registers */ +#define DC_ADDRESS 0x0200 +#define DC_DEVEN (1 << 7) + +#define DC_MODE 0x020c +#define DC_DMACLKON (1 << 9) +#define DC_VBUSSTAT (1 << 8) +#define DC_CLKAON (1 << 7) +#define DC_SNDRSU (1 << 6) +#define DC_GOSUSP (1 << 5) +#define DC_SFRESET (1 << 4) +#define DC_GLINTENA (1 << 3) +#define DC_WKUPCS (1 << 2) + +#define DC_INTCONF 0x0210 +#define DC_CDBGMOD_ACK_NAK (0 << 6) +#define DC_CDBGMOD_ACK (1 << 6) +#define DC_CDBGMOD_ACK_1NAK (2 << 6) +#define DC_DDBGMODIN_ACK_NAK (0 << 4) +#define DC_DDBGMODIN_ACK (1 << 4) +#define DC_DDBGMODIN_ACK_1NAK (2 << 4) +#define DC_DDBGMODOUT_ACK_NYET_NAK (0 << 2) +#define DC_DDBGMODOUT_ACK_NYET (1 << 2) +#define DC_DDBGMODOUT_ACK_NYET_1NAK (2 << 2) +#define DC_INTLVL (1 << 1) +#define DC_INTPOL (1 << 0) + +#define DC_DEBUG 0x0212 +#define DC_INTENABLE 0x0214 +#define DC_IEPTX(n) (1 << (11 + 2 * (n))) +#define DC_IEPRX(n) (1 << (10 + 2 * (n))) +#define DC_IEPRXTX(n) (3 << (10 + 2 * (n))) +#define DC_IEP0SETUP (1 << 8) +#define DC_IEVBUS (1 << 7) +#define DC_IEDMA (1 << 6) +#define DC_IEHS_STA (1 << 5) +#define DC_IERESM (1 << 4) +#define DC_IESUSP (1 << 3) +#define DC_IEPSOF (1 << 2) +#define DC_IESOF (1 << 1) +#define DC_IEBRST (1 << 0) + +/* Data Flow Registers */ +#define DC_EPINDEX 0x022c +#define DC_EP0SETUP (1 << 5) +#define DC_ENDPIDX(n) ((n) << 1) +#define DC_EPDIR (1 << 0) + +#define DC_CTRLFUNC 0x0228 +#define DC_CLBUF (1 << 4) +#define DC_VENDP (1 << 3) +#define DC_DSEN (1 << 2) +#define DC_STATUS (1 << 1) +#define DC_STALL (1 << 0) + +#define DC_DATAPORT 0x0220 +#define DC_BUFLEN 0x021c +#define DC_DATACOUNT_MASK 0xffff +#define DC_BUFSTAT 0x021e +#define DC_EPMAXPKTSZ 0x0204 + +#define DC_EPTYPE 0x0208 +#define DC_NOEMPKT (1 << 4) +#define DC_EPENABLE (1 << 3) +#define DC_DBLBUF (1 << 2) +#define DC_ENDPTYP_ISOC (1 << 0) +#define DC_ENDPTYP_BULK (2 << 0) +#define DC_ENDPTYP_INTERRUPT (3 << 0) + +/* DMA Registers */ +#define DC_DMACMD 0x0230 +#define DC_DMATXCOUNT 0x0234 +#define DC_DMACONF 0x0238 +#define DC_DMAHW 0x023c +#define DC_DMAINTREASON 0x0250 +#define DC_DMAINTEN 0x0254 +#define DC_DMAEP 0x0258 +#define DC_DMABURSTCOUNT 0x0264 + +/* General Registers */ +#define DC_INTERRUPT 0x0218 +#define DC_CHIPID 0x0270 +#define DC_FRAMENUM 0x0274 +#define DC_SCRATCH 0x0278 +#define DC_UNLOCKDEV 0x027c +#define DC_INTPULSEWIDTH 0x0280 +#define DC_TESTMODE 0x0284 + +#endif diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c new file mode 100644 index 000000000000..6bfda3082807 --- /dev/null +++ b/drivers/usb/isp1760/isp1760-udc.c @@ -0,0 +1,1495 @@ +/* + * Driver for the NXP ISP1761 device controller + * + * Copyright 2014 Ideas on Board Oy + * + * Contacts: + * Laurent Pinchart + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#include "isp1760-core.h" +#include "isp1760-regs.h" +#include "isp1760-udc.h" + +#define ISP1760_VBUS_POLL_INTERVAL msecs_to_jiffies(500) + +struct isp1760_request { + struct usb_request req; + struct list_head queue; + struct isp1760_ep *ep; + unsigned int packet_size; +}; + +static inline struct isp1760_udc *gadget_to_udc(struct usb_gadget *gadget) +{ + return container_of(gadget, struct isp1760_udc, gadget); +} + +static inline struct isp1760_ep *ep_to_udc_ep(struct usb_ep *ep) +{ + return container_of(ep, struct isp1760_ep, ep); +} + +static inline struct isp1760_request *req_to_udc_req(struct usb_request *req) +{ + return container_of(req, struct isp1760_request, req); +} + +static inline u32 isp1760_udc_read(struct isp1760_udc *udc, u16 reg) +{ + return isp1760_read32(udc->regs, reg); +} + +static inline void isp1760_udc_write(struct isp1760_udc *udc, u16 reg, u32 val) +{ + isp1760_write32(udc->regs, reg, val); +} + +/* ----------------------------------------------------------------------------- + * Endpoint Management + */ + +static struct isp1760_ep *isp1760_udc_find_ep(struct isp1760_udc *udc, + u16 index) +{ + unsigned int i; + + if (index == 0) + return &udc->ep[0]; + + for (i = 1; i < ARRAY_SIZE(udc->ep); ++i) { + if (udc->ep[i].addr == index) + return udc->ep[i].desc ? &udc->ep[i] : NULL; + } + + return NULL; +} + +static void __isp1760_udc_select_ep(struct isp1760_ep *ep, int dir) +{ + isp1760_udc_write(ep->udc, DC_EPINDEX, + DC_ENDPIDX(ep->addr & USB_ENDPOINT_NUMBER_MASK) | + (dir == USB_DIR_IN ? DC_EPDIR : 0)); +} + +/** + * isp1760_udc_select_ep - Select an endpoint for register access + * @ep: The endpoint + * + * The ISP1761 endpoint registers are banked. This function selects the target + * endpoint for banked register access. The selection remains valid until the + * next call to this function, the next direct access to the EPINDEX register + * or the next reset, whichever comes first. + * + * Called with the UDC spinlock held. + */ +static void isp1760_udc_select_ep(struct isp1760_ep *ep) +{ + __isp1760_udc_select_ep(ep, ep->addr & USB_ENDPOINT_DIR_MASK); +} + +/* Called with the UDC spinlock held. */ +static void isp1760_udc_ctrl_send_status(struct isp1760_ep *ep, int dir) +{ + struct isp1760_udc *udc = ep->udc; + + /* + * Proceed to the status stage. The status stage data packet flows in + * the direction opposite to the data stage data packets, we thus need + * to select the OUT/IN endpoint for IN/OUT transfers. + */ + isp1760_udc_write(udc, DC_EPINDEX, DC_ENDPIDX(0) | + (dir == USB_DIR_IN ? 0 : DC_EPDIR)); + isp1760_udc_write(udc, DC_CTRLFUNC, DC_STATUS); + + /* + * The hardware will terminate the request automatically and go back to + * the setup stage without notifying us. + */ + udc->ep0_state = ISP1760_CTRL_SETUP; +} + +/* Called without the UDC spinlock held. */ +static void isp1760_udc_request_complete(struct isp1760_ep *ep, + struct isp1760_request *req, + int status) +{ + struct isp1760_udc *udc = ep->udc; + unsigned long flags; + + dev_dbg(ep->udc->isp->dev, "completing request %p with status %d\n", + req, status); + + req->ep = NULL; + req->req.status = status; + req->req.complete(&ep->ep, &req->req); + + spin_lock_irqsave(&udc->lock, flags); + + /* + * When completing control OUT requests, move to the status stage after + * calling the request complete callback. This gives the gadget an + * opportunity to stall the control transfer if needed. + */ + if (status == 0 && ep->addr == 0 && udc->ep0_dir == USB_DIR_OUT) + isp1760_udc_ctrl_send_status(ep, USB_DIR_OUT); + + spin_unlock_irqrestore(&udc->lock, flags); +} + +static void isp1760_udc_ctrl_send_stall(struct isp1760_ep *ep) +{ + struct isp1760_udc *udc = ep->udc; + unsigned long flags; + + dev_dbg(ep->udc->isp->dev, "%s(ep%02x)\n", __func__, ep->addr); + + spin_lock_irqsave(&udc->lock, flags); + + /* Stall both the IN and OUT endpoints. */ + __isp1760_udc_select_ep(ep, USB_DIR_OUT); + isp1760_udc_write(udc, DC_CTRLFUNC, DC_STALL); + __isp1760_udc_select_ep(ep, USB_DIR_IN); + isp1760_udc_write(udc, DC_CTRLFUNC, DC_STALL); + + /* A protocol stall completes the control transaction. */ + udc->ep0_state = ISP1760_CTRL_SETUP; + + spin_unlock_irqrestore(&udc->lock, flags); +} + +/* ----------------------------------------------------------------------------- + * Data Endpoints + */ + +/* Called with the UDC spinlock held. */ +static bool isp1760_udc_receive(struct isp1760_ep *ep, + struct isp1760_request *req) +{ + struct isp1760_udc *udc = ep->udc; + unsigned int len; + u32 *buf; + int i; + + isp1760_udc_select_ep(ep); + len = isp1760_udc_read(udc, DC_BUFLEN) & DC_DATACOUNT_MASK; + + dev_dbg(udc->isp->dev, "%s: received %u bytes (%u/%u done)\n", + __func__, len, req->req.actual, req->req.length); + + len = min(len, req->req.length - req->req.actual); + + if (!len) { + /* + * There's no data to be read from the FIFO, acknowledge the RX + * interrupt by clearing the buffer. + * + * TODO: What if another packet arrives in the meantime ? The + * datasheet doesn't clearly document how this should be + * handled. + */ + isp1760_udc_write(udc, DC_CTRLFUNC, DC_CLBUF); + return false; + } + + buf = req->req.buf + req->req.actual; + + /* + * Make sure not to read more than one extra byte, otherwise data from + * the next packet might be removed from the FIFO. + */ + for (i = len; i > 2; i -= 4, ++buf) + *buf = le32_to_cpu(isp1760_udc_read(udc, DC_DATAPORT)); + if (i > 0) + *(u16 *)buf = le16_to_cpu(readw(udc->regs + DC_DATAPORT)); + + req->req.actual += len; + + /* + * TODO: The short_not_ok flag isn't supported yet, but isn't used by + * any gadget driver either. + */ + + dev_dbg(udc->isp->dev, + "%s: req %p actual/length %u/%u maxpacket %u packet size %u\n", + __func__, req, req->req.actual, req->req.length, ep->maxpacket, + len); + + ep->rx_pending = false; + + /* + * Complete the request if all data has been received or if a short + * packet has been received. + */ + if (req->req.actual == req->req.length || len < ep->maxpacket) { + list_del(&req->queue); + return true; + } + + return false; +} + +static void isp1760_udc_transmit(struct isp1760_ep *ep, + struct isp1760_request *req) +{ + struct isp1760_udc *udc = ep->udc; + u32 *buf = req->req.buf + req->req.actual; + int i; + + req->packet_size = min(req->req.length - req->req.actual, + ep->maxpacket); + + dev_dbg(udc->isp->dev, "%s: transferring %u bytes (%u/%u done)\n", + __func__, req->packet_size, req->req.actual, + req->req.length); + + __isp1760_udc_select_ep(ep, USB_DIR_IN); + + if (req->packet_size) + isp1760_udc_write(udc, DC_BUFLEN, req->packet_size); + + /* + * Make sure not to write more than one extra byte, otherwise extra data + * will stay in the FIFO and will be transmitted during the next control + * request. The endpoint control CLBUF bit is supposed to allow flushing + * the FIFO for this kind of conditions, but doesn't seem to work. + */ + for (i = req->packet_size; i > 2; i -= 4, ++buf) + isp1760_udc_write(udc, DC_DATAPORT, cpu_to_le32(*buf)); + if (i > 0) + writew(cpu_to_le16(*(u16 *)buf), udc->regs + DC_DATAPORT); + + if (ep->addr == 0) + isp1760_udc_write(udc, DC_CTRLFUNC, DC_DSEN); + if (!req->packet_size) + isp1760_udc_write(udc, DC_CTRLFUNC, DC_VENDP); +} + +static void isp1760_ep_rx_ready(struct isp1760_ep *ep) +{ + struct isp1760_udc *udc = ep->udc; + struct isp1760_request *req; + bool complete; + + spin_lock(&udc->lock); + + if (ep->addr == 0 && udc->ep0_state != ISP1760_CTRL_DATA_OUT) { + spin_unlock(&udc->lock); + dev_dbg(udc->isp->dev, "%s: invalid ep0 state %u\n", __func__, + udc->ep0_state); + return; + } + + if (ep->addr != 0 && !ep->desc) { + spin_unlock(&udc->lock); + dev_dbg(udc->isp->dev, "%s: ep%02x is disabled\n", __func__, + ep->addr); + return; + } + + if (list_empty(&ep->queue)) { + ep->rx_pending = true; + spin_unlock(&udc->lock); + dev_dbg(udc->isp->dev, "%s: ep%02x (%p) has no request queued\n", + __func__, ep->addr, ep); + return; + } + + req = list_first_entry(&ep->queue, struct isp1760_request, + queue); + complete = isp1760_udc_receive(ep, req); + + spin_unlock(&udc->lock); + + if (complete) + isp1760_udc_request_complete(ep, req, 0); +} + +static void isp1760_ep_tx_complete(struct isp1760_ep *ep) +{ + struct isp1760_udc *udc = ep->udc; + struct isp1760_request *complete = NULL; + struct isp1760_request *req; + bool need_zlp; + + spin_lock(&udc->lock); + + if (ep->addr == 0 && udc->ep0_state != ISP1760_CTRL_DATA_IN) { + spin_unlock(&udc->lock); + dev_dbg(udc->isp->dev, "TX IRQ: invalid endpoint state %u\n", + udc->ep0_state); + return; + } + + if (list_empty(&ep->queue)) { + /* + * This can happen for the control endpoint when the reply to + * the GET_STATUS IN control request is sent directly by the + * setup IRQ handler. Just proceed to the status stage. + */ + if (ep->addr == 0) { + isp1760_udc_ctrl_send_status(ep, USB_DIR_IN); + spin_unlock(&udc->lock); + return; + } + + spin_unlock(&udc->lock); + dev_dbg(udc->isp->dev, "%s: ep%02x has no request queued\n", + __func__, ep->addr); + return; + } + + req = list_first_entry(&ep->queue, struct isp1760_request, + queue); + req->req.actual += req->packet_size; + + need_zlp = req->req.actual == req->req.length && + !(req->req.length % ep->maxpacket) && + req->packet_size && req->req.zero; + + dev_dbg(udc->isp->dev, + "TX IRQ: req %p actual/length %u/%u maxpacket %u packet size %u zero %u need zlp %u\n", + req, req->req.actual, req->req.length, ep->maxpacket, + req->packet_size, req->req.zero, need_zlp); + + /* + * Complete the request if all data has been sent and we don't need to + * transmit a zero length packet. + */ + if (req->req.actual == req->req.length && !need_zlp) { + complete = req; + list_del(&req->queue); + + if (ep->addr == 0) + isp1760_udc_ctrl_send_status(ep, USB_DIR_IN); + + if (!list_empty(&ep->queue)) + req = list_first_entry(&ep->queue, + struct isp1760_request, queue); + else + req = NULL; + } + + /* + * Transmit the next packet or start the next request, if any. + * + * TODO: If the endpoint is stalled the next request shouldn't be + * started, but what about the next packet ? + */ + if (req) + isp1760_udc_transmit(ep, req); + + spin_unlock(&udc->lock); + + if (complete) + isp1760_udc_request_complete(ep, complete, 0); +} + +static int __isp1760_udc_set_halt(struct isp1760_ep *ep, bool halt) +{ + struct isp1760_udc *udc = ep->udc; + + dev_dbg(udc->isp->dev, "%s: %s halt on ep%02x\n", __func__, + halt ? "set" : "clear", ep->addr); + + if (ep->desc && usb_endpoint_xfer_isoc(ep->desc)) { + dev_dbg(udc->isp->dev, "%s: ep%02x is isochronous\n", __func__, + ep->addr); + return -EINVAL; + } + + isp1760_udc_select_ep(ep); + isp1760_udc_write(udc, DC_CTRLFUNC, halt ? DC_STALL : 0); + + if (ep->addr == 0) { + /* When halting the control endpoint, stall both IN and OUT. */ + __isp1760_udc_select_ep(ep, USB_DIR_IN); + isp1760_udc_write(udc, DC_CTRLFUNC, halt ? DC_STALL : 0); + } else if (!halt) { + /* Reset the data PID by cycling the endpoint enable bit. */ + u16 eptype = isp1760_udc_read(udc, DC_EPTYPE); + + isp1760_udc_write(udc, DC_EPTYPE, eptype & ~DC_EPENABLE); + isp1760_udc_write(udc, DC_EPTYPE, eptype); + + /* + * Disabling the endpoint emptied the transmit FIFO, fill it + * again if a request is pending. + * + * TODO: Does the gadget framework require synchronizatino with + * the TX IRQ handler ? + */ + if ((ep->addr & USB_DIR_IN) && !list_empty(&ep->queue)) { + struct isp1760_request *req; + + req = list_first_entry(&ep->queue, + struct isp1760_request, queue); + isp1760_udc_transmit(ep, req); + } + } + + ep->halted = halt; + + return 0; +} + +/* ----------------------------------------------------------------------------- + * Control Endpoint + */ + +static int isp1760_udc_get_status(struct isp1760_udc *udc, + const struct usb_ctrlrequest *req) +{ + struct isp1760_ep *ep; + u16 status; + + if (req->wLength != cpu_to_le16(2) || req->wValue != cpu_to_le16(0)) + return -EINVAL; + + switch (req->bRequestType) { + case USB_DIR_IN | USB_RECIP_DEVICE: + status = udc->devstatus; + break; + + case USB_DIR_IN | USB_RECIP_INTERFACE: + status = 0; + break; + + case USB_DIR_IN | USB_RECIP_ENDPOINT: + ep = isp1760_udc_find_ep(udc, le16_to_cpu(req->wIndex)); + if (!ep) + return -EINVAL; + + status = 0; + if (ep->halted) + status |= 1 << USB_ENDPOINT_HALT; + break; + + default: + return -EINVAL; + } + + isp1760_udc_write(udc, DC_EPINDEX, DC_ENDPIDX(0) | DC_EPDIR); + isp1760_udc_write(udc, DC_BUFLEN, 2); + + writew(cpu_to_le16(status), udc->regs + DC_DATAPORT); + + isp1760_udc_write(udc, DC_CTRLFUNC, DC_DSEN); + + dev_dbg(udc->isp->dev, "%s: status 0x%04x\n", __func__, status); + + return 0; +} + +static int isp1760_udc_set_address(struct isp1760_udc *udc, u16 addr) +{ + if (addr > 127) { + dev_dbg(udc->isp->dev, "invalid device address %u\n", addr); + return -EINVAL; + } + + if (udc->gadget.state != USB_STATE_DEFAULT && + udc->gadget.state != USB_STATE_ADDRESS) { + dev_dbg(udc->isp->dev, "can't set address in state %u\n", + udc->gadget.state); + return -EINVAL; + } + + usb_gadget_set_state(&udc->gadget, addr ? USB_STATE_ADDRESS : + USB_STATE_DEFAULT); + + isp1760_udc_write(udc, DC_ADDRESS, DC_DEVEN | addr); + + spin_lock(&udc->lock); + isp1760_udc_ctrl_send_status(&udc->ep[0], USB_DIR_OUT); + spin_unlock(&udc->lock); + + return 0; +} + +static bool isp1760_ep0_setup_standard(struct isp1760_udc *udc, + struct usb_ctrlrequest *req) +{ + bool stall; + + switch (req->bRequest) { + case USB_REQ_GET_STATUS: + return isp1760_udc_get_status(udc, req); + + case USB_REQ_CLEAR_FEATURE: + switch (req->bRequestType) { + case USB_DIR_OUT | USB_RECIP_DEVICE: { + /* TODO: Handle remote wakeup feature. */ + return true; + } + + case USB_DIR_OUT | USB_RECIP_ENDPOINT: { + u16 index = le16_to_cpu(req->wIndex); + struct isp1760_ep *ep; + + if (req->wLength != cpu_to_le16(0) || + req->wValue != cpu_to_le16(USB_ENDPOINT_HALT)) + return true; + + ep = isp1760_udc_find_ep(udc, index); + if (!ep) + return true; + + spin_lock(&udc->lock); + + /* + * If the endpoint is wedged only the gadget can clear + * the halt feature. Pretend success in that case, but + * keep the endpoint halted. + */ + if (!ep->wedged) + stall = __isp1760_udc_set_halt(ep, false); + else + stall = false; + + if (!stall) + isp1760_udc_ctrl_send_status(&udc->ep[0], + USB_DIR_OUT); + + spin_unlock(&udc->lock); + return stall; + } + + default: + return true; + } + break; + + case USB_REQ_SET_FEATURE: + switch (req->bRequestType) { + case USB_DIR_OUT | USB_RECIP_DEVICE: { + /* TODO: Handle remote wakeup and test mode features */ + return true; + } + + case USB_DIR_OUT | USB_RECIP_ENDPOINT: { + u16 index = le16_to_cpu(req->wIndex); + struct isp1760_ep *ep; + + if (req->wLength != cpu_to_le16(0) || + req->wValue != cpu_to_le16(USB_ENDPOINT_HALT)) + return true; + + ep = isp1760_udc_find_ep(udc, index); + if (!ep) + return true; + + spin_lock(&udc->lock); + + stall = __isp1760_udc_set_halt(ep, true); + if (!stall) + isp1760_udc_ctrl_send_status(&udc->ep[0], + USB_DIR_OUT); + + spin_unlock(&udc->lock); + return stall; + } + + default: + return true; + } + break; + + case USB_REQ_SET_ADDRESS: + if (req->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE)) + return true; + + return isp1760_udc_set_address(udc, le16_to_cpu(req->wValue)); + + case USB_REQ_SET_CONFIGURATION: + if (req->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE)) + return true; + + if (udc->gadget.state != USB_STATE_ADDRESS && + udc->gadget.state != USB_STATE_CONFIGURED) + return true; + + stall = udc->driver->setup(&udc->gadget, req) < 0; + if (stall) + return true; + + usb_gadget_set_state(&udc->gadget, req->wValue ? + USB_STATE_CONFIGURED : USB_STATE_ADDRESS); + + /* + * SET_CONFIGURATION (and SET_INTERFACE) must reset the halt + * feature on all endpoints. There is however no need to do so + * explicitly here as the gadget driver will disable and + * reenable endpoints, clearing the halt feature. + */ + return false; + + default: + return udc->driver->setup(&udc->gadget, req) < 0; + } +} + +static void isp1760_ep0_setup(struct isp1760_udc *udc) +{ + union { + struct usb_ctrlrequest r; + u32 data[2]; + } req; + unsigned int count; + bool stall = false; + + spin_lock(&udc->lock); + + isp1760_udc_write(udc, DC_EPINDEX, DC_EP0SETUP); + + count = isp1760_udc_read(udc, DC_BUFLEN) & DC_DATACOUNT_MASK; + if (count != sizeof(req)) { + spin_unlock(&udc->lock); + + dev_err(udc->isp->dev, "invalid length %u for setup packet\n", + count); + + isp1760_udc_ctrl_send_stall(&udc->ep[0]); + return; + } + + req.data[0] = isp1760_udc_read(udc, DC_DATAPORT); + req.data[1] = isp1760_udc_read(udc, DC_DATAPORT); + + if (udc->ep0_state != ISP1760_CTRL_SETUP) { + spin_unlock(&udc->lock); + dev_dbg(udc->isp->dev, "unexpected SETUP packet\n"); + return; + } + + /* Move to the data stage. */ + if (!req.r.wLength) + udc->ep0_state = ISP1760_CTRL_STATUS; + else if (req.r.bRequestType & USB_DIR_IN) + udc->ep0_state = ISP1760_CTRL_DATA_IN; + else + udc->ep0_state = ISP1760_CTRL_DATA_OUT; + + udc->ep0_dir = req.r.bRequestType & USB_DIR_IN; + udc->ep0_length = le16_to_cpu(req.r.wLength); + + spin_unlock(&udc->lock); + + dev_dbg(udc->isp->dev, + "%s: bRequestType 0x%02x bRequest 0x%02x wValue 0x%04x wIndex 0x%04x wLength 0x%04x\n", + __func__, req.r.bRequestType, req.r.bRequest, + le16_to_cpu(req.r.wValue), le16_to_cpu(req.r.wIndex), + le16_to_cpu(req.r.wLength)); + + if ((req.r.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + stall = isp1760_ep0_setup_standard(udc, &req.r); + else + stall = udc->driver->setup(&udc->gadget, &req.r) < 0; + + if (stall) + isp1760_udc_ctrl_send_stall(&udc->ep[0]); +} + +/* ----------------------------------------------------------------------------- + * Gadget Endpoint Operations + */ + +static int isp1760_ep_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + struct isp1760_ep *uep = ep_to_udc_ep(ep); + struct isp1760_udc *udc = uep->udc; + unsigned long flags; + unsigned int type; + + dev_dbg(uep->udc->isp->dev, "%s\n", __func__); + + /* + * Validate the descriptor. The control endpoint can't be enabled + * manually. + */ + if (desc->bDescriptorType != USB_DT_ENDPOINT || + desc->bEndpointAddress == 0 || + desc->bEndpointAddress != uep->addr || + le16_to_cpu(desc->wMaxPacketSize) > ep->maxpacket) { + dev_dbg(udc->isp->dev, + "%s: invalid descriptor type %u addr %02x ep addr %02x max packet size %u/%u\n", + __func__, desc->bDescriptorType, + desc->bEndpointAddress, uep->addr, + le16_to_cpu(desc->wMaxPacketSize), ep->maxpacket); + return -EINVAL; + } + + switch (usb_endpoint_type(desc)) { + case USB_ENDPOINT_XFER_ISOC: + type = DC_ENDPTYP_ISOC; + break; + case USB_ENDPOINT_XFER_BULK: + type = DC_ENDPTYP_BULK; + break; + case USB_ENDPOINT_XFER_INT: + type = DC_ENDPTYP_INTERRUPT; + break; + case USB_ENDPOINT_XFER_CONTROL: + default: + dev_dbg(udc->isp->dev, "%s: control endpoints unsupported\n", + __func__); + return -EINVAL; + } + + spin_lock_irqsave(&udc->lock, flags); + + uep->desc = desc; + uep->maxpacket = le16_to_cpu(desc->wMaxPacketSize); + uep->rx_pending = false; + uep->halted = false; + uep->wedged = false; + + isp1760_udc_select_ep(uep); + isp1760_udc_write(udc, DC_EPMAXPKTSZ, uep->maxpacket); + isp1760_udc_write(udc, DC_BUFLEN, uep->maxpacket); + isp1760_udc_write(udc, DC_EPTYPE, DC_EPENABLE | type); + + spin_unlock_irqrestore(&udc->lock, flags); + + return 0; +} + +static int isp1760_ep_disable(struct usb_ep *ep) +{ + struct isp1760_ep *uep = ep_to_udc_ep(ep); + struct isp1760_udc *udc = uep->udc; + struct isp1760_request *req, *nreq; + LIST_HEAD(req_list); + unsigned long flags; + + dev_dbg(udc->isp->dev, "%s\n", __func__); + + spin_lock_irqsave(&udc->lock, flags); + + if (!uep->desc) { + dev_dbg(udc->isp->dev, "%s: endpoint not enabled\n", __func__); + spin_unlock_irqrestore(&udc->lock, flags); + return -EINVAL; + } + + uep->desc = NULL; + uep->maxpacket = 0; + + isp1760_udc_select_ep(uep); + isp1760_udc_write(udc, DC_EPTYPE, 0); + + /* TODO Synchronize with the IRQ handler */ + + list_splice_init(&uep->queue, &req_list); + + spin_unlock_irqrestore(&udc->lock, flags); + + list_for_each_entry_safe(req, nreq, &req_list, queue) { + list_del(&req->queue); + isp1760_udc_request_complete(uep, req, -ESHUTDOWN); + } + + return 0; +} + +static struct usb_request *isp1760_ep_alloc_request(struct usb_ep *ep, + gfp_t gfp_flags) +{ + struct isp1760_request *req; + + req = kzalloc(sizeof(*req), gfp_flags); + + return &req->req; +} + +static void isp1760_ep_free_request(struct usb_ep *ep, struct usb_request *_req) +{ + struct isp1760_request *req = req_to_udc_req(_req); + + kfree(req); +} + +static int isp1760_ep_queue(struct usb_ep *ep, struct usb_request *_req, + gfp_t gfp_flags) +{ + struct isp1760_request *req = req_to_udc_req(_req); + struct isp1760_ep *uep = ep_to_udc_ep(ep); + struct isp1760_udc *udc = uep->udc; + bool complete = false; + unsigned long flags; + int ret = 0; + + _req->status = -EINPROGRESS; + _req->actual = 0; + + spin_lock_irqsave(&udc->lock, flags); + + dev_dbg(udc->isp->dev, + "%s: req %p (%u bytes%s) ep %p(0x%02x)\n", __func__, _req, + _req->length, _req->zero ? " (zlp)" : "", uep, uep->addr); + + req->ep = uep; + + if (uep->addr == 0) { + if (_req->length != udc->ep0_length && + udc->ep0_state != ISP1760_CTRL_DATA_IN) { + dev_dbg(udc->isp->dev, + "%s: invalid length %u for req %p\n", + __func__, _req->length, req); + ret = -EINVAL; + goto done; + } + + switch (udc->ep0_state) { + case ISP1760_CTRL_DATA_IN: + dev_dbg(udc->isp->dev, "%s: transmitting req %p\n", + __func__, req); + + list_add_tail(&req->queue, &uep->queue); + isp1760_udc_transmit(uep, req); + break; + + case ISP1760_CTRL_DATA_OUT: + list_add_tail(&req->queue, &uep->queue); + __isp1760_udc_select_ep(uep, USB_DIR_OUT); + isp1760_udc_write(udc, DC_CTRLFUNC, DC_DSEN); + break; + + case ISP1760_CTRL_STATUS: + complete = true; + break; + + default: + dev_dbg(udc->isp->dev, "%s: invalid ep0 state\n", + __func__); + ret = -EINVAL; + break; + } + } else if (uep->desc) { + bool empty = list_empty(&uep->queue); + + list_add_tail(&req->queue, &uep->queue); + if ((uep->addr & USB_DIR_IN) && !uep->halted && empty) + isp1760_udc_transmit(uep, req); + else if (!(uep->addr & USB_DIR_IN) && uep->rx_pending) + complete = isp1760_udc_receive(uep, req); + } else { + dev_dbg(udc->isp->dev, + "%s: can't queue request to disabled ep%02x\n", + __func__, uep->addr); + ret = -ESHUTDOWN; + } + +done: + if (ret < 0) + req->ep = NULL; + + spin_unlock_irqrestore(&udc->lock, flags); + + if (complete) + isp1760_udc_request_complete(uep, req, 0); + + return ret; +} + +static int isp1760_ep_dequeue(struct usb_ep *ep, struct usb_request *_req) +{ + struct isp1760_request *req = req_to_udc_req(_req); + struct isp1760_ep *uep = ep_to_udc_ep(ep); + struct isp1760_udc *udc = uep->udc; + unsigned long flags; + + dev_dbg(uep->udc->isp->dev, "%s(ep%02x)\n", __func__, uep->addr); + + spin_lock_irqsave(&udc->lock, flags); + + if (req->ep != uep) + req = NULL; + else + list_del(&req->queue); + + spin_unlock_irqrestore(&udc->lock, flags); + + if (!req) + return -EINVAL; + + isp1760_udc_request_complete(uep, req, -ECONNRESET); + return 0; +} + +static int __isp1760_ep_set_halt(struct isp1760_ep *uep, bool stall, bool wedge) +{ + struct isp1760_udc *udc = uep->udc; + int ret; + + if (!uep->addr) { + /* + * Halting the control endpoint is only valid as a delayed error + * response to a SETUP packet. Make sure EP0 is in the right + * stage and that the gadget isn't trying to clear the halt + * condition. + */ + if (WARN_ON(udc->ep0_state == ISP1760_CTRL_SETUP || !stall || + wedge)) { + return -EINVAL; + } + } + + if (uep->addr && !uep->desc) { + dev_dbg(udc->isp->dev, "%s: ep%02x is disabled\n", __func__, + uep->addr); + return -EINVAL; + } + + if (uep->addr & USB_DIR_IN) { + /* Refuse to halt IN endpoints with active transfers. */ + if (!list_empty(&uep->queue)) { + dev_dbg(udc->isp->dev, + "%s: ep%02x has request pending\n", __func__, + uep->addr); + return -EAGAIN; + } + } + + ret = __isp1760_udc_set_halt(uep, stall); + if (ret < 0) + return ret; + + if (!uep->addr) { + /* + * Stalling EP0 completes the control transaction, move back to + * the SETUP state. + */ + udc->ep0_state = ISP1760_CTRL_SETUP; + return 0; + } + + if (wedge) + uep->wedged = true; + else if (!stall) + uep->wedged = false; + + return 0; +} + +static int isp1760_ep_set_halt(struct usb_ep *ep, int value) +{ + struct isp1760_ep *uep = ep_to_udc_ep(ep); + unsigned long flags; + int ret; + + dev_dbg(uep->udc->isp->dev, "%s: %s halt on ep%02x\n", __func__, + value ? "set" : "clear", uep->addr); + + spin_lock_irqsave(&uep->udc->lock, flags); + ret = __isp1760_ep_set_halt(uep, value, false); + spin_unlock_irqrestore(&uep->udc->lock, flags); + + return ret; +} + +static int isp1760_ep_set_wedge(struct usb_ep *ep) +{ + struct isp1760_ep *uep = ep_to_udc_ep(ep); + unsigned long flags; + int ret; + + dev_dbg(uep->udc->isp->dev, "%s: set wedge on ep%02x)\n", __func__, + uep->addr); + + spin_lock_irqsave(&uep->udc->lock, flags); + ret = __isp1760_ep_set_halt(uep, true, true); + spin_unlock_irqrestore(&uep->udc->lock, flags); + + return ret; +} + +static void isp1760_ep_fifo_flush(struct usb_ep *ep) +{ + struct isp1760_ep *uep = ep_to_udc_ep(ep); + struct isp1760_udc *udc = uep->udc; + unsigned long flags; + + spin_lock_irqsave(&udc->lock, flags); + + isp1760_udc_select_ep(uep); + + /* + * Set the CLBUF bit twice to flush both buffers in case double + * buffering is enabled. + */ + isp1760_udc_write(udc, DC_CTRLFUNC, DC_CLBUF); + isp1760_udc_write(udc, DC_CTRLFUNC, DC_CLBUF); + + spin_unlock_irqrestore(&udc->lock, flags); +} + +static const struct usb_ep_ops isp1760_ep_ops = { + .enable = isp1760_ep_enable, + .disable = isp1760_ep_disable, + .alloc_request = isp1760_ep_alloc_request, + .free_request = isp1760_ep_free_request, + .queue = isp1760_ep_queue, + .dequeue = isp1760_ep_dequeue, + .set_halt = isp1760_ep_set_halt, + .set_wedge = isp1760_ep_set_wedge, + .fifo_flush = isp1760_ep_fifo_flush, +}; + +/* ----------------------------------------------------------------------------- + * Device States + */ + +/* Called with the UDC spinlock held. */ +static void isp1760_udc_connect(struct isp1760_udc *udc) +{ + usb_gadget_set_state(&udc->gadget, USB_STATE_POWERED); + mod_timer(&udc->vbus_timer, jiffies + ISP1760_VBUS_POLL_INTERVAL); +} + +/* Called with the UDC spinlock held. */ +static void isp1760_udc_disconnect(struct isp1760_udc *udc) +{ + if (udc->gadget.state < USB_STATE_POWERED) + return; + + dev_dbg(udc->isp->dev, "Device disconnected in state %u\n", + udc->gadget.state); + + udc->gadget.speed = USB_SPEED_UNKNOWN; + usb_gadget_set_state(&udc->gadget, USB_STATE_ATTACHED); + + if (udc->driver->disconnect) + udc->driver->disconnect(&udc->gadget); + + del_timer(&udc->vbus_timer); + + /* TODO Reset all endpoints ? */ +} + +static void isp1760_udc_init_hw(struct isp1760_udc *udc) +{ + /* + * The device controller currently shares its interrupt with the host + * controller, the DC_IRQ polarity and signaling mode are ignored. Set + * the to active-low level-triggered. + * + * Configure the control, in and out pipes to generate interrupts on + * ACK tokens only (and NYET for the out pipe). The default + * configuration also generates an interrupt on the first NACK token. + */ + isp1760_udc_write(udc, DC_INTCONF, DC_CDBGMOD_ACK | DC_DDBGMODIN_ACK | + DC_DDBGMODOUT_ACK_NYET); + + isp1760_udc_write(udc, DC_INTENABLE, DC_IEPRXTX(7) | DC_IEPRXTX(6) | + DC_IEPRXTX(5) | DC_IEPRXTX(4) | DC_IEPRXTX(3) | + DC_IEPRXTX(2) | DC_IEPRXTX(1) | DC_IEPRXTX(0) | + DC_IEP0SETUP | DC_IEVBUS | DC_IERESM | DC_IESUSP | + DC_IEHS_STA | DC_IEBRST); + + if (udc->connected) + isp1760_set_pullup(udc->isp, true); + + isp1760_udc_write(udc, DC_ADDRESS, DC_DEVEN); +} + +static void isp1760_udc_reset(struct isp1760_udc *udc) +{ + unsigned long flags; + + spin_lock_irqsave(&udc->lock, flags); + + /* + * The bus reset has reset most registers to their default value, + * reinitialize the UDC hardware. + */ + isp1760_udc_init_hw(udc); + + udc->ep0_state = ISP1760_CTRL_SETUP; + udc->gadget.speed = USB_SPEED_FULL; + + usb_gadget_udc_reset(&udc->gadget, udc->driver); + + spin_unlock_irqrestore(&udc->lock, flags); +} + +static void isp1760_udc_suspend(struct isp1760_udc *udc) +{ + if (udc->gadget.state < USB_STATE_DEFAULT) + return; + + if (udc->driver->suspend) + udc->driver->suspend(&udc->gadget); +} + +static void isp1760_udc_resume(struct isp1760_udc *udc) +{ + if (udc->gadget.state < USB_STATE_DEFAULT) + return; + + if (udc->driver->resume) + udc->driver->resume(&udc->gadget); +} + +/* ----------------------------------------------------------------------------- + * Gadget Operations + */ + +static int isp1760_udc_get_frame(struct usb_gadget *gadget) +{ + struct isp1760_udc *udc = gadget_to_udc(gadget); + + return isp1760_udc_read(udc, DC_FRAMENUM) & ((1 << 11) - 1); +} + +static int isp1760_udc_wakeup(struct usb_gadget *gadget) +{ + struct isp1760_udc *udc = gadget_to_udc(gadget); + + dev_dbg(udc->isp->dev, "%s\n", __func__); + return -ENOTSUPP; +} + +static int isp1760_udc_set_selfpowered(struct usb_gadget *gadget, + int is_selfpowered) +{ + struct isp1760_udc *udc = gadget_to_udc(gadget); + + if (is_selfpowered) + udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED; + else + udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); + + return 0; +} + +static int isp1760_udc_pullup(struct usb_gadget *gadget, int is_on) +{ + struct isp1760_udc *udc = gadget_to_udc(gadget); + + isp1760_set_pullup(udc->isp, is_on); + udc->connected = is_on; + + return 0; +} + +static int isp1760_udc_start(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + struct isp1760_udc *udc = gadget_to_udc(gadget); + + /* The hardware doesn't support low speed. */ + if (driver->max_speed < USB_SPEED_FULL) { + dev_err(udc->isp->dev, "Invalid gadget driver\n"); + return -EINVAL; + } + + spin_lock(&udc->lock); + + if (udc->driver) { + dev_err(udc->isp->dev, "UDC already has a gadget driver\n"); + spin_unlock(&udc->lock); + return -EBUSY; + } + + udc->driver = driver; + + spin_unlock(&udc->lock); + + dev_dbg(udc->isp->dev, "starting UDC with driver %s\n", + driver->function); + + udc->devstatus = 0; + udc->connected = true; + + usb_gadget_set_state(&udc->gadget, USB_STATE_ATTACHED); + + /* DMA isn't supported yet, don't enable the DMA clock. */ + isp1760_udc_write(udc, DC_MODE, DC_GLINTENA); + + isp1760_udc_init_hw(udc); + + dev_dbg(udc->isp->dev, "UDC started with driver %s\n", + driver->function); + + return 0; +} + +static int isp1760_udc_stop(struct usb_gadget *gadget) +{ + struct isp1760_udc *udc = gadget_to_udc(gadget); + + dev_dbg(udc->isp->dev, "%s\n", __func__); + + del_timer_sync(&udc->vbus_timer); + + isp1760_udc_write(udc, DC_MODE, 0); + + spin_lock(&udc->lock); + udc->driver = NULL; + spin_unlock(&udc->lock); + + return 0; +} + +static struct usb_gadget_ops isp1760_udc_ops = { + .get_frame = isp1760_udc_get_frame, + .wakeup = isp1760_udc_wakeup, + .set_selfpowered = isp1760_udc_set_selfpowered, + .pullup = isp1760_udc_pullup, + .udc_start = isp1760_udc_start, + .udc_stop = isp1760_udc_stop, +}; + +/* ----------------------------------------------------------------------------- + * Interrupt Handling + */ + +static irqreturn_t isp1760_udc_irq(int irq, void *dev) +{ + struct isp1760_udc *udc = dev; + unsigned int i; + u32 status; + + status = isp1760_udc_read(udc, DC_INTERRUPT) + & isp1760_udc_read(udc, DC_INTENABLE); + isp1760_udc_write(udc, DC_INTERRUPT, status); + + if (status & DC_IEVBUS) { + dev_dbg(udc->isp->dev, "%s(VBUS)\n", __func__); + /* The VBUS interrupt is only triggered when VBUS appears. */ + spin_lock(&udc->lock); + isp1760_udc_connect(udc); + spin_unlock(&udc->lock); + } + + if (status & DC_IEBRST) { + dev_dbg(udc->isp->dev, "%s(BRST)\n", __func__); + + isp1760_udc_reset(udc); + } + + for (i = 0; i <= 7; ++i) { + struct isp1760_ep *ep = &udc->ep[i*2]; + + if (status & DC_IEPTX(i)) { + dev_dbg(udc->isp->dev, "%s(EPTX%u)\n", __func__, i); + isp1760_ep_tx_complete(ep); + } + + if (status & DC_IEPRX(i)) { + dev_dbg(udc->isp->dev, "%s(EPRX%u)\n", __func__, i); + isp1760_ep_rx_ready(i ? ep - 1 : ep); + } + } + + if (status & DC_IEP0SETUP) { + dev_dbg(udc->isp->dev, "%s(EP0SETUP)\n", __func__); + + isp1760_ep0_setup(udc); + } + + if (status & DC_IERESM) { + dev_dbg(udc->isp->dev, "%s(RESM)\n", __func__); + isp1760_udc_resume(udc); + } + + if (status & DC_IESUSP) { + dev_dbg(udc->isp->dev, "%s(SUSP)\n", __func__); + + spin_lock(&udc->lock); + if (!(isp1760_udc_read(udc, DC_MODE) & DC_VBUSSTAT)) + isp1760_udc_disconnect(udc); + else + isp1760_udc_suspend(udc); + spin_unlock(&udc->lock); + } + + if (status & DC_IEHS_STA) { + dev_dbg(udc->isp->dev, "%s(HS_STA)\n", __func__); + udc->gadget.speed = USB_SPEED_HIGH; + } + + return status ? IRQ_HANDLED : IRQ_NONE; +} + +static void isp1760_udc_vbus_poll(unsigned long data) +{ + struct isp1760_udc *udc = (struct isp1760_udc *)data; + unsigned long flags; + + spin_lock_irqsave(&udc->lock, flags); + + if (!(isp1760_udc_read(udc, DC_MODE) & DC_VBUSSTAT)) + isp1760_udc_disconnect(udc); + else if (udc->gadget.state >= USB_STATE_POWERED) + mod_timer(&udc->vbus_timer, + jiffies + ISP1760_VBUS_POLL_INTERVAL); + + spin_unlock_irqrestore(&udc->lock, flags); +} + +/* ----------------------------------------------------------------------------- + * Registration + */ + +static void isp1760_udc_init_eps(struct isp1760_udc *udc) +{ + unsigned int i; + + INIT_LIST_HEAD(&udc->gadget.ep_list); + + for (i = 0; i < ARRAY_SIZE(udc->ep); ++i) { + struct isp1760_ep *ep = &udc->ep[i]; + unsigned int ep_num = (i + 1) / 2; + bool is_in = !(i & 1); + + ep->udc = udc; + + INIT_LIST_HEAD(&ep->queue); + + ep->addr = (ep_num && is_in ? USB_DIR_IN : USB_DIR_OUT) + | ep_num; + ep->desc = NULL; + + sprintf(ep->name, "ep%u%s", ep_num, + ep_num ? (is_in ? "in" : "out") : ""); + + ep->ep.ops = &isp1760_ep_ops; + ep->ep.name = ep->name; + + /* + * Hardcode the maximum packet sizes for now, to 64 bytes for + * the control endpoint and 512 bytes for all other endpoints. + * This fits in the 8kB FIFO without double-buffering. + */ + if (ep_num == 0) { + ep->ep.maxpacket = 64; + ep->maxpacket = 64; + udc->gadget.ep0 = &ep->ep; + } else { + ep->ep.maxpacket = 512; + ep->maxpacket = 0; + list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); + } + } +} + +static int isp1760_udc_init(struct isp1760_udc *udc) +{ + u16 scratch; + u32 chipid; + + /* + * Check that the controller is present by writing to the scratch + * register, modifying the bus pattern by reading from the chip ID + * register, and reading the scratch register value back. The chip ID + * and scratch register contents must match the expected values. + */ + isp1760_udc_write(udc, DC_SCRATCH, 0xbabe); + chipid = isp1760_udc_read(udc, DC_CHIPID); + scratch = isp1760_udc_read(udc, DC_SCRATCH); + + if (scratch != 0xbabe) { + dev_err(udc->isp->dev, + "udc: scratch test failed (0x%04x/0x%08x)\n", + scratch, chipid); + return -ENODEV; + } + + if (chipid != 0x00011582) { + dev_err(udc->isp->dev, "udc: invalid chip ID 0x%08x\n", chipid); + return -ENODEV; + } + + /* Reset the device controller. */ + isp1760_udc_write(udc, DC_MODE, DC_SFRESET); + usleep_range(10000, 11000); + isp1760_udc_write(udc, DC_MODE, 0); + usleep_range(10000, 11000); + + return 0; +} + +int isp1760_udc_register(struct isp1760_device *isp, int irq, + unsigned long irqflags) +{ + struct isp1760_udc *udc = &isp->udc; + const char *devname; + int ret; + + udc->irq = -1; + udc->isp = isp; + udc->regs = isp->regs; + + spin_lock_init(&udc->lock); + setup_timer(&udc->vbus_timer, isp1760_udc_vbus_poll, + (unsigned long)udc); + + ret = isp1760_udc_init(udc); + if (ret < 0) + return ret; + + devname = dev_name(isp->dev); + udc->irqname = kmalloc(strlen(devname) + 7, GFP_KERNEL); + if (!udc->irqname) + return -ENOMEM; + + sprintf(udc->irqname, "%s (udc)", devname); + + ret = request_irq(irq, isp1760_udc_irq, IRQF_SHARED | IRQF_DISABLED | + irqflags, udc->irqname, udc); + if (ret < 0) + goto error; + + udc->irq = irq; + + /* + * Initialize the gadget static fields and register its device. Gadget + * fields that vary during the life time of the gadget are initialized + * by the UDC core. + */ + udc->gadget.ops = &isp1760_udc_ops; + udc->gadget.speed = USB_SPEED_UNKNOWN; + udc->gadget.max_speed = USB_SPEED_HIGH; + udc->gadget.name = "isp1761_udc"; + + isp1760_udc_init_eps(udc); + + ret = usb_add_gadget_udc(isp->dev, &udc->gadget); + if (ret < 0) + goto error; + + return 0; + +error: + if (udc->irq >= 0) + free_irq(udc->irq, udc); + kfree(udc->irqname); + + return ret; +} + +void isp1760_udc_unregister(struct isp1760_device *isp) +{ + struct isp1760_udc *udc = &isp->udc; + + usb_del_gadget_udc(&udc->gadget); + + free_irq(udc->irq, udc); + kfree(udc->irqname); +} diff --git a/drivers/usb/isp1760/isp1760-udc.h b/drivers/usb/isp1760/isp1760-udc.h new file mode 100644 index 000000000000..4af6ba6eda86 --- /dev/null +++ b/drivers/usb/isp1760/isp1760-udc.h @@ -0,0 +1,106 @@ +/* + * Driver for the NXP ISP1761 device controller + * + * Copyright 2014 Ideas on Board Oy + * + * Contacts: + * Laurent Pinchart + * + * 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. + */ + +#ifndef _ISP1760_UDC_H_ +#define _ISP1760_UDC_H_ + +#include +#include +#include +#include +#include + +struct isp1760_device; +struct isp1760_udc; + +enum isp1760_ctrl_state { + ISP1760_CTRL_SETUP, /* Waiting for a SETUP transaction */ + ISP1760_CTRL_DATA_IN, /* Setup received, data IN stage */ + ISP1760_CTRL_DATA_OUT, /* Setup received, data OUT stage */ + ISP1760_CTRL_STATUS, /* 0-length request in status stage */ +}; + +struct isp1760_ep { + struct isp1760_udc *udc; + struct usb_ep ep; + + struct list_head queue; + + unsigned int addr; + unsigned int maxpacket; + char name[7]; + + const struct usb_endpoint_descriptor *desc; + + bool rx_pending; + bool halted; + bool wedged; +}; + +/** + * struct isp1760_udc - UDC state information + * irq: IRQ number + * irqname: IRQ name (as passed to request_irq) + * regs: Base address of the UDC registers + * driver: Gadget driver + * gadget: Gadget device + * lock: Protects driver, vbus_timer, ep, ep0_*, DC_EPINDEX register + * ep: Array of endpoints + * ep0_state: Control request state for endpoint 0 + * ep0_dir: Direction of the current control request + * ep0_length: Length of the current control request + * connected: Tracks gadget driver bus connection state + */ +struct isp1760_udc { +#if CONFIG_USB_ISP1761_UDC + struct isp1760_device *isp; + + int irq; + char *irqname; + void __iomem *regs; + + struct usb_gadget_driver *driver; + struct usb_gadget gadget; + + spinlock_t lock; + struct timer_list vbus_timer; + + struct isp1760_ep ep[15]; + + enum isp1760_ctrl_state ep0_state; + u8 ep0_dir; + u16 ep0_length; + + bool connected; + + unsigned int devstatus; +#endif +}; + +#if CONFIG_USB_ISP1761_UDC +int isp1760_udc_register(struct isp1760_device *isp, int irq, + unsigned long irqflags); +void isp1760_udc_unregister(struct isp1760_device *isp); +#else +static inline int isp1760_udc_register(struct isp1760_device *isp, int irq, + unsigned long irqflags) +{ + return 0; +} + +static inline void isp1760_udc_unregister(struct isp1760_device *isp) +{ +} +#endif + +#endif