#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/debugfs.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <linux/extcon.h>
+#include <linux/freezer.h>
+#include <linux/iopoll.h>
#include <linux/reset.h>
+#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
+#include <linux/usb/ch9.h>
#include "core.h"
#include "io.h"
#include "../host/xhci.h"
-#define DWC3_ROCKCHIP_AUTOSUSPEND_DELAY 500 /* ms */
+#define DWC3_ROCKCHIP_AUTOSUSPEND_DELAY 500 /* ms */
+#define PERIPHERAL_DISCONNECT_TIMEOUT 1000000 /* us */
+#define WAIT_FOR_HCD_READY_TIMEOUT 5000000 /* us */
+#define XHCI_TSTCTRL_MASK (0xf << 28)
struct dwc3_rockchip {
int num_clocks;
bool connected;
+ bool skip_suspend;
bool suspended;
struct device *dev;
struct clk **clks;
struct dwc3 *dwc;
+ struct dentry *root;
struct reset_control *otg_rst;
struct extcon_dev *edev;
struct notifier_block device_nb;
struct mutex lock;
};
+static int dwc3_rockchip_force_mode_show(struct seq_file *s, void *unused)
+{
+ struct dwc3_rockchip *rockchip = s->private;
+ struct dwc3 *dwc = rockchip->dwc;
+
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_HOST:
+ seq_puts(s, "host\n");
+ break;
+ case USB_DR_MODE_PERIPHERAL:
+ seq_puts(s, "peripheral\n");
+ break;
+ case USB_DR_MODE_OTG:
+ seq_puts(s, "otg\n");
+ break;
+ default:
+ seq_puts(s, "UNKNOWN\n");
+ }
+
+ return 0;
+}
+
+static int dwc3_rockchip_force_mode_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dwc3_rockchip_force_mode_show,
+ inode->i_private);
+}
+
+static ssize_t dwc3_rockchip_force_mode_write(struct file *file,
+ const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct dwc3_rockchip *rockchip = s->private;
+ struct dwc3 *dwc = rockchip->dwc;
+ enum usb_dr_mode new_dr_mode;
+ char buf[32];
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "0", 1) || !strncmp(buf, "otg", 3)) {
+ new_dr_mode = USB_DR_MODE_OTG;
+ } else if (!strncmp(buf, "1", 1) || !strncmp(buf, "host", 4)) {
+ new_dr_mode = USB_DR_MODE_HOST;
+ } else if (!strncmp(buf, "2", 1) || !strncmp(buf, "peripheral", 10)) {
+ new_dr_mode = USB_DR_MODE_PERIPHERAL;
+ } else {
+ dev_info(rockchip->dev, "illegal dr_mode\n");
+ return count;
+ }
+
+ if (dwc->dr_mode == new_dr_mode) {
+ dev_info(rockchip->dev, "Same with current dr_mode\n");
+ return count;
+ }
+
+ /*
+ * Disconnect vbus to trigger gadget disconnect process by setting
+ * the mode of phy to invalid if the current dr_mode of controller
+ * is peripheral, than schedule otg work to change connect status
+ * and suspend the controller.
+ */
+ if (dwc->dr_mode == USB_DR_MODE_PERIPHERAL)
+ phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_INVALID);
+ dwc->dr_mode = USB_DR_MODE_OTG;
+ schedule_work(&rockchip->otg_work);
+ flush_work(&rockchip->otg_work);
+
+ /*
+ * Schedule otg work to change connect status and resume the
+ * controller, than connect vbus to trigger connect interrupt
+ * and connect gadget by setting the mode of phy to device if
+ * the dr_mode is peripheral.
+ */
+ dwc->dr_mode = new_dr_mode;
+ schedule_work(&rockchip->otg_work);
+ flush_work(&rockchip->otg_work);
+ if (dwc->dr_mode == USB_DR_MODE_PERIPHERAL)
+ phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
+
+ return count;
+}
+
+static const struct file_operations dwc3_rockchip_force_mode_fops = {
+ .open = dwc3_rockchip_force_mode_open,
+ .write = dwc3_rockchip_force_mode_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int dwc3_rockchip_host_testmode_show(struct seq_file *s, void *unused)
+{
+ struct dwc3_rockchip *rockchip = s->private;
+ struct dwc3 *dwc = rockchip->dwc;
+ struct usb_hcd *hcd = dev_get_drvdata(&dwc->xhci->dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ __le32 __iomem **port_array;
+ u32 reg;
+
+ if (rockchip->dwc->dr_mode == USB_DR_MODE_PERIPHERAL) {
+ dev_warn(rockchip->dev, "USB HOST not support!\n");
+ return 0;
+ }
+
+ if (hcd->state == HC_STATE_HALT) {
+ dev_warn(rockchip->dev, "HOST is halted, set test mode first!\n");
+ return 0;
+ }
+
+ port_array = xhci->usb2_ports;
+ reg = readl(port_array[0] + PORTPMSC);
+ reg &= XHCI_TSTCTRL_MASK;
+ reg >>= 28;
+
+ switch (reg) {
+ case 0:
+ seq_puts(s, "U2: no test\n");
+ break;
+ case TEST_J:
+ seq_puts(s, "U2: test_j\n");
+ break;
+ case TEST_K:
+ seq_puts(s, "U2: test_k\n");
+ break;
+ case TEST_SE0_NAK:
+ seq_puts(s, "U2: test_se0_nak\n");
+ break;
+ case TEST_PACKET:
+ seq_puts(s, "U2: test_packet\n");
+ break;
+ case TEST_FORCE_EN:
+ seq_puts(s, "U2: test_force_enable\n");
+ break;
+ default:
+ seq_printf(s, "U2: UNKNOWN %d\n", reg);
+ }
+
+ port_array = xhci->usb3_ports;
+ reg = readl(port_array[0]);
+ reg &= PORT_PLS_MASK;
+ if (reg == USB_SS_PORT_LS_COMP_MOD)
+ seq_puts(s, "U3: compliance mode\n");
+ else
+ seq_printf(s, "U3: UNKNOWN %d\n", reg >> 5);
+
+ return 0;
+}
+
+static int dwc3_rockchip_host_testmode_open(struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, dwc3_rockchip_host_testmode_show,
+ inode->i_private);
+}
+
+/**
+ * dwc3_rockchip_set_test_mode - Enables USB2/USB3 HOST Test Modes
+ * @rockchip: pointer to our context structure
+ * @mode: the mode to set (U2: J, K SE0 NAK, Test_packet,
+ * Force Enable; U3: Compliance mode)
+ *
+ * This function will return 0 on success or -EINVAL if wrong Test
+ * Selector is passed.
+ */
+static int dwc3_rockchip_set_test_mode(struct dwc3_rockchip *rockchip,
+ u32 mode)
+{
+ struct dwc3 *dwc = rockchip->dwc;
+ struct usb_hcd *hcd = dev_get_drvdata(&dwc->xhci->dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ __le32 __iomem **port_array;
+ int ret, val;
+ u32 reg;
+
+ ret = readx_poll_timeout(readl, &hcd->state, val,
+ val != HC_STATE_HALT, 1000,
+ WAIT_FOR_HCD_READY_TIMEOUT);
+ if (ret < 0) {
+ dev_err(rockchip->dev, "Wait for HCD ready timeout\n");
+ return -EINVAL;
+ }
+
+ switch (mode) {
+ case TEST_J:
+ case TEST_K:
+ case TEST_SE0_NAK:
+ case TEST_PACKET:
+ case TEST_FORCE_EN:
+ port_array = xhci->usb2_ports;
+ reg = readl(port_array[0] + PORTPMSC);
+ reg &= ~XHCI_TSTCTRL_MASK;
+ reg |= mode << 28;
+ writel(reg, port_array[0] + PORTPMSC);
+ break;
+ case USB_SS_PORT_LS_COMP_MOD:
+ port_array = xhci->usb3_ports;
+ xhci_set_link_state(xhci, port_array, 0, mode);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ dev_info(rockchip->dev, "set USB HOST test mode successfully!\n");
+
+ return 0;
+}
+
+static ssize_t dwc3_rockchip_host_testmode_write(struct file *file,
+ const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct dwc3_rockchip *rockchip = s->private;
+ struct extcon_dev *edev = rockchip->edev;
+ u32 testmode = 0;
+ bool flip = 0;
+ char buf[32];
+ union extcon_property_value property;
+
+ if (rockchip->dwc->dr_mode == USB_DR_MODE_PERIPHERAL) {
+ dev_warn(rockchip->dev, "USB HOST not support!\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "test_j", 6)) {
+ testmode = TEST_J;
+ } else if (!strncmp(buf, "test_k", 6)) {
+ testmode = TEST_K;
+ } else if (!strncmp(buf, "test_se0_nak", 12)) {
+ testmode = TEST_SE0_NAK;
+ } else if (!strncmp(buf, "test_packet", 11)) {
+ testmode = TEST_PACKET;
+ } else if (!strncmp(buf, "test_force_enable", 17)) {
+ testmode = TEST_FORCE_EN;
+ } else if (!strncmp(buf, "test_u3", 7)) {
+ testmode = USB_SS_PORT_LS_COMP_MOD;
+ } else if (!strncmp(buf, "test_flip_u3", 12)) {
+ testmode = USB_SS_PORT_LS_COMP_MOD;
+ flip = 1;
+ } else {
+ dev_warn(rockchip->dev, "Test cmd not support!\n");
+ return -EINVAL;
+ }
+
+ if (edev && !extcon_get_cable_state_(edev, EXTCON_USB_HOST)) {
+ if (extcon_get_cable_state_(edev, EXTCON_USB) > 0)
+ extcon_set_cable_state_(edev, EXTCON_USB, false);
+
+ property.intval = flip;
+ extcon_set_property(edev, EXTCON_USB_HOST,
+ EXTCON_PROP_USB_TYPEC_POLARITY, property);
+ extcon_set_cable_state_(edev, EXTCON_USB_HOST, true);
+
+ /* Add a delay 1~1.5s to wait for XHCI HCD init */
+ usleep_range(1000000, 1500000);
+ }
+
+ dwc3_rockchip_set_test_mode(rockchip, testmode);
+
+ return count;
+}
+
+static const struct file_operations dwc3_host_testmode_fops = {
+ .open = dwc3_rockchip_host_testmode_open,
+ .write = dwc3_rockchip_host_testmode_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void dwc3_rockchip_debugfs_init(struct dwc3_rockchip *rockchip)
+{
+ struct dentry *root;
+ struct dentry *file;
+
+ root = debugfs_create_dir(dev_name(rockchip->dev), NULL);
+ if (IS_ERR_OR_NULL(root)) {
+ if (!root)
+ dev_err(rockchip->dev, "Can't create debugfs root\n");
+ return;
+ }
+ rockchip->root = root;
+
+ if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
+ IS_ENABLED(CONFIG_USB_DWC3_HOST)) {
+ file = debugfs_create_file("host_testmode", S_IRUSR | S_IWUSR,
+ root, rockchip,
+ &dwc3_host_testmode_fops);
+ if (!file)
+ dev_dbg(rockchip->dev, "Can't create debugfs host_testmode\n");
+ }
+
+ if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) &&
+ !rockchip->edev && (rockchip->dwc->dr_mode == USB_DR_MODE_OTG)) {
+ file = debugfs_create_file("rk_usb_force_mode",
+ S_IRUSR | S_IWUSR,
+ root, rockchip,
+ &dwc3_rockchip_force_mode_fops);
+ if (!file)
+ dev_dbg(rockchip->dev,
+ "Can't create debugfs rk_usb_force_mode\n");
+ }
+}
+
static int dwc3_rockchip_device_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct xhci_hcd *xhci;
unsigned long flags;
int ret;
- u32 reg;
+ int val;
+ u32 reg, count;
mutex_lock(&rockchip->lock);
- if (extcon_get_cable_state_(edev, EXTCON_USB) > 0) {
+ if (rockchip->edev ? extcon_get_cable_state_(edev, EXTCON_USB) :
+ (dwc->dr_mode == USB_DR_MODE_PERIPHERAL)) {
if (rockchip->connected)
goto out;
* the dwc3 core code could at least in theory access chip
* registers while the reset is asserted, with unknown impact.
*/
- reset_control_assert(rockchip->otg_rst);
- usleep_range(1000, 1200);
- reset_control_deassert(rockchip->otg_rst);
-
- pm_runtime_get_sync(rockchip->dev);
- pm_runtime_get_sync(dwc->dev);
+ if (!rockchip->skip_suspend) {
+ reset_control_assert(rockchip->otg_rst);
+ usleep_range(1000, 1200);
+ reset_control_deassert(rockchip->otg_rst);
+
+ pm_runtime_get_sync(rockchip->dev);
+ pm_runtime_get_sync(dwc->dev);
+ } else {
+ rockchip->skip_suspend = false;
+ }
spin_lock_irqsave(&dwc->lock, flags);
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
rockchip->connected = true;
dev_info(rockchip->dev, "USB peripheral connected\n");
- } else if (extcon_get_cable_state_(edev, EXTCON_USB_HOST) > 0) {
+ } else if (rockchip->edev ?
+ extcon_get_cable_state_(edev, EXTCON_USB_HOST) :
+ (dwc->dr_mode == USB_DR_MODE_HOST)) {
if (rockchip->connected)
goto out;
+ if (rockchip->skip_suspend) {
+ pm_runtime_put(dwc->dev);
+ pm_runtime_put(rockchip->dev);
+ rockchip->skip_suspend = false;
+ }
+
/*
* If dr_mode is device only, never to
* set the mode to the host mode.
if (hcd->state != HC_STATE_HALT) {
xhci->xhc_state |= XHCI_STATE_REMOVING;
+ count = 0;
+
+ /*
+ * Wait until XHCI controller resume from
+ * PM suspend, them we can remove hcd safely.
+ */
+ while (dwc->xhci->dev.power.is_suspended) {
+ if (++count > 100) {
+ dev_err(rockchip->dev,
+ "wait for XHCI resume 10s timeout!\n");
+ goto out;
+ }
+ msleep(100);
+ }
+
+#ifdef CONFIG_FREEZER
+ /*
+ * usb_remove_hcd() may call usb_disconnect() to
+ * remove a block device pluged in before.
+ * Unfortunately, the block layer suspend/resume
+ * path is fundamentally broken due to freezable
+ * kthreads and workqueue and may deadlock if a
+ * block device gets removed while resume is in
+ * progress.
+ *
+ * We need to add a ugly hack to avoid removing
+ * hcd and kicking off device removal while
+ * freezer is active. This is a joke but does
+ * avoid this particular deadlock when test with
+ * USB-C HUB and USB2/3 flash drive.
+ */
+ while (pm_freezing)
+ usleep_range(10000, 11000);
+#endif
+
usb_remove_hcd(hcd->shared_hcd);
usb_remove_hcd(hcd);
}
phy_power_off(dwc->usb3_generic_phy);
}
- pm_runtime_put_sync(rockchip->dev);
- pm_runtime_put_sync_suspend(dwc->dev);
+ if (DWC3_GCTL_PRTCAP(reg) == DWC3_GCTL_PRTCAP_DEVICE) {
+ ret = readx_poll_timeout(atomic_read,
+ &dwc->dev->power.usage_count,
+ val,
+ val < 2 && !dwc->connected,
+ 1000,
+ PERIPHERAL_DISCONNECT_TIMEOUT);
+ if (ret < 0) {
+ rockchip->skip_suspend = true;
+ dev_warn(rockchip->dev, "Peripheral disconnect timeout\n");
+ }
+ }
+
+ if (!rockchip->skip_suspend) {
+ pm_runtime_put_sync_suspend(dwc->dev);
+ pm_runtime_put_sync_suspend(rockchip->dev);
+ }
rockchip->connected = false;
dev_info(rockchip->dev, "USB unconnected\n");
return PTR_ERR(edev);
}
- INIT_WORK(&rockchip->otg_work,
- dwc3_rockchip_otg_extcon_evt_work);
-
rockchip->device_nb.notifier_call =
dwc3_rockchip_device_notifier;
ret = extcon_register_notifier(edev, EXTCON_USB,
&rockchip->device_nb);
extcon_unregister_notifier(rockchip->edev, EXTCON_USB_HOST,
&rockchip->host_nb);
+
cancel_work_sync(&rockchip->otg_work);
}
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node, *child;
struct platform_device *child_pdev;
+ struct usb_hcd *hcd = NULL;
unsigned int count;
int ret;
goto err1;
}
+ INIT_WORK(&rockchip->otg_work, dwc3_rockchip_otg_extcon_evt_work);
+
child_pdev = of_find_device_by_node(child);
if (!child_pdev) {
dev_err(dev, "failed to find dwc3 core device\n");
goto err2;
}
+ if (rockchip->dwc->dr_mode == USB_DR_MODE_HOST ||
+ rockchip->dwc->dr_mode == USB_DR_MODE_OTG) {
+ hcd = dev_get_drvdata(&rockchip->dwc->xhci->dev);
+ if (!hcd) {
+ dev_err(dev, "fail to get drvdata hcd\n");
+ ret = -EPROBE_DEFER;
+ goto err2;
+ }
+ }
+
ret = dwc3_rockchip_extcon_register(rockchip);
if (ret < 0)
goto err2;
- if (rockchip->edev) {
- if (rockchip->dwc->dr_mode == USB_DR_MODE_HOST ||
- rockchip->dwc->dr_mode == USB_DR_MODE_OTG) {
- struct usb_hcd *hcd =
- dev_get_drvdata(&rockchip->dwc->xhci->dev);
- if (!hcd) {
- dev_err(dev, "fail to get drvdata hcd\n");
- ret = -EPROBE_DEFER;
- goto err3;
- }
- if (hcd->state != HC_STATE_HALT) {
- usb_remove_hcd(hcd->shared_hcd);
- usb_remove_hcd(hcd);
- }
+ if (rockchip->edev || (rockchip->dwc->dr_mode == USB_DR_MODE_OTG)) {
+ if (hcd && hcd->state != HC_STATE_HALT) {
+ usb_remove_hcd(hcd->shared_hcd);
+ usb_remove_hcd(hcd);
}
pm_runtime_set_autosuspend_delay(&child_pdev->dev,
schedule_work(&rockchip->otg_work);
}
+ dwc3_rockchip_debugfs_init(rockchip);
+
mutex_unlock(&rockchip->lock);
return ret;
-err3:
- dwc3_rockchip_extcon_unregister(rockchip);
-
err2:
of_platform_depopulate(dev);
dwc3_rockchip_extcon_unregister(rockchip);
+ debugfs_remove_recursive(rockchip->root);
+
/* Restore hcd state before unregistering xhci */
if (rockchip->edev && !rockchip->connected) {
struct usb_hcd *hcd =
static int dwc3_rockchip_suspend(struct device *dev)
{
struct dwc3_rockchip *rockchip = dev_get_drvdata(dev);
+ struct dwc3 *dwc = rockchip->dwc;
rockchip->suspended = true;
cancel_work_sync(&rockchip->otg_work);
+ if (rockchip->edev && dwc->dr_mode != USB_DR_MODE_PERIPHERAL) {
+ /*
+ * If USB HOST connected, we will do phy power
+ * on in extcon evt work, so need to do phy
+ * power off in suspend. And we just power off
+ * USB2 PHY here because USB3 PHY power on operation
+ * need to be done while DWC3 controller is in P2
+ * state, but after resume DWC3 controller is in
+ * P0 state. So we put USB3 PHY in power on state.
+ */
+ if (extcon_get_cable_state_(rockchip->edev,
+ EXTCON_USB_HOST) > 0)
+ phy_power_off(dwc->usb2_generic_phy);
+ }
+
return 0;
}
static int dwc3_rockchip_resume(struct device *dev)
{
struct dwc3_rockchip *rockchip = dev_get_drvdata(dev);
+ struct dwc3 *dwc = rockchip->dwc;
rockchip->suspended = false;
+ if (rockchip->edev)
+ schedule_work(&rockchip->otg_work);
+
+ if (rockchip->edev && dwc->dr_mode != USB_DR_MODE_PERIPHERAL) {
+ if (extcon_get_cable_state_(rockchip->edev,
+ EXTCON_USB_HOST) > 0)
+ phy_power_on(dwc->usb2_generic_phy);
+ }
+
return 0;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff