Merge tag 'tegra-for-5.7-usb-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into usb-next

Thierry writes:

usb: tegra: Changes for v5.7-rc1

These changes add USB OTG support for the XUSB host and XUSB device
controllers found on NVIDIA Tegra SoCs.

* tag 'tegra-for-5.7-usb-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  usb: gadget: tegra-xudc: Support multiple device modes
  usb: gadget: tegra-xudc: Use phy_set_mode() to set/unset device mode
  usb: gadget: tegra-xudc: Add usb-phy support
  usb: gadget: tegra-xudc: Remove usb-role-switch support
  usb: xhci-tegra: Add OTG support
  phy: tegra: Select USB_PHY
  phy: tegra: Don't use device-managed API to allocate ports
  phy: tegra: Fix regulator leak
  phy: tegra: Print -EPROBE_DEFER error message at debug level
  phy: tegra: xusb: Don't warn on probe defer
  phy: tegra: xusb: Add Tegra194 support
  phy: tegra: xusb: Protect Tegra186 soc with config
  phy: tegra: xusb: Add set_mode support for UTMI phy on Tegra186
  phy: tegra: xusb: Add set_mode support for USB 2 phy on Tegra210
  phy: tegra: xusb: Add support to get companion USB 3 port
  phy: tegra: xusb: Add usb-phy support
  phy: tegra: xusb: Add usb-role-switch support

3 files changed, 415 insertions, 89 deletions

diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index 1ff82285ac7a..3a7179e90f4e 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -455,7 +455,6 @@ config USB_TEGRA_XUDC
 	tristate "NVIDIA Tegra Superspeed USB 3.0 Device Controller"
 	depends on ARCH_TEGRA || COMPILE_TEST
 	depends on PHY_TEGRA_XUSB
-	select USB_ROLE_SWITCH
 	help
 	 Enables NVIDIA Tegra USB 3.0 device mode controller driver.
 
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index 09eb64e9889a..52a6add961f4 100644
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -26,7 +26,9 @@
 #include <linux/reset.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
 #include <linux/usb/role.h>
+#include <linux/usb/phy.h>
 #include <linux/workqueue.h>
 
 /* XUSB_DEV registers */
@@ -477,17 +479,21 @@ struct tegra_xudc {
 
 	struct clk_bulk_data *clks;
 
-	enum usb_role device_mode;
-	struct usb_role_switch *usb_role_sw;
+	bool device_mode;
 	struct work_struct usb_role_sw_work;
 
-	struct phy *usb3_phy;
-	struct phy *utmi_phy;
+	struct phy **usb3_phy;
+	struct phy *curr_usb3_phy;
+	struct phy **utmi_phy;
+	struct phy *curr_utmi_phy;
 
 	struct tegra_xudc_save_regs saved_regs;
 	bool suspended;
 	bool powergated;
 
+	struct usb_phy **usbphy;
+	struct notifier_block vbus_nb;
+
 	struct completion disconnect_complete;
 
 	bool selfpowered;
@@ -517,6 +523,7 @@ struct tegra_xudc_soc {
 	unsigned int num_supplies;
 	const char * const *clock_names;
 	unsigned int num_clks;
+	unsigned int num_phys;
 	bool u1_enable;
 	bool u2_enable;
 	bool lpm_enable;
@@ -598,19 +605,18 @@ static void tegra_xudc_device_mode_on(struct tegra_xudc *xudc)
 
 	pm_runtime_get_sync(xudc->dev);
 
-	err = phy_power_on(xudc->utmi_phy);
+	err = phy_power_on(xudc->curr_utmi_phy);
 	if (err < 0)
 		dev_err(xudc->dev, "utmi power on failed %d\n", err);
 
-	err = phy_power_on(xudc->usb3_phy);
+	err = phy_power_on(xudc->curr_usb3_phy);
 	if (err < 0)
 		dev_err(xudc->dev, "usb3 phy power on failed %d\n", err);
 
 	dev_dbg(xudc->dev, "device mode on\n");
 
-	tegra_xusb_padctl_set_vbus_override(xudc->padctl, true);
-
-	xudc->device_mode = USB_ROLE_DEVICE;
+	phy_set_mode_ext(xudc->curr_utmi_phy, PHY_MODE_USB_OTG,
+			 USB_ROLE_DEVICE);
 }
 
 static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
@@ -625,7 +631,7 @@ static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
 
 	reinit_completion(&xudc->disconnect_complete);
 
-	tegra_xusb_padctl_set_vbus_override(xudc->padctl, false);
+	phy_set_mode_ext(xudc->curr_utmi_phy, PHY_MODE_USB_OTG, USB_ROLE_NONE);
 
 	pls = (xudc_readl(xudc, PORTSC) & PORTSC_PLS_MASK) >>
 		PORTSC_PLS_SHIFT;
@@ -643,8 +649,6 @@ static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
 		xudc_writel(xudc, val, PORTSC);
 	}
 
-	xudc->device_mode = USB_ROLE_NONE;
-
 	/* Wait for disconnect event. */
 	if (connected)
 		wait_for_completion(&xudc->disconnect_complete);
@@ -652,11 +656,11 @@ static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc)
 	/* Make sure interrupt handler has completed before powergating. */
 	synchronize_irq(xudc->irq);
 
-	err = phy_power_off(xudc->utmi_phy);
+	err = phy_power_off(xudc->curr_utmi_phy);
 	if (err < 0)
 		dev_err(xudc->dev, "utmi_phy power off failed %d\n", err);
 
-	err = phy_power_off(xudc->usb3_phy);
+	err = phy_power_off(xudc->curr_usb3_phy);
 	if (err < 0)
 		dev_err(xudc->dev, "usb3_phy power off failed %d\n", err);
 
@@ -668,30 +672,57 @@ static void tegra_xudc_usb_role_sw_work(struct work_struct *work)
 	struct tegra_xudc *xudc = container_of(work, struct tegra_xudc,
 					       usb_role_sw_work);
 
-	if (!xudc->usb_role_sw ||
-		usb_role_switch_get_role(xudc->usb_role_sw) == USB_ROLE_DEVICE)
+	if (xudc->device_mode)
 		tegra_xudc_device_mode_on(xudc);
 	else
 		tegra_xudc_device_mode_off(xudc);
+}
+
+static int tegra_xudc_get_phy_index(struct tegra_xudc *xudc,
+					      struct usb_phy *usbphy)
+{
+	unsigned int i;
 
+	for (i = 0; i < xudc->soc->num_phys; i++) {
+		if (xudc->usbphy[i] && usbphy == xudc->usbphy[i])
+			return i;
+	}
+
+	dev_info(xudc->dev, "phy index could not be found for shared USB PHY");
+	return -1;
 }
 
-static int tegra_xudc_usb_role_sw_set(struct usb_role_switch *sw,
-				      enum usb_role role)
+static int tegra_xudc_vbus_notify(struct notifier_block *nb,
+					 unsigned long action, void *data)
 {
-	struct tegra_xudc *xudc = usb_role_switch_get_drvdata(sw);
-	unsigned long flags;
+	struct tegra_xudc *xudc = container_of(nb, struct tegra_xudc,
+					       vbus_nb);
+	struct usb_phy *usbphy = (struct usb_phy *)data;
+	int phy_index;
 
-	dev_dbg(xudc->dev, "%s role is %d\n", __func__, role);
+	dev_dbg(xudc->dev, "%s(): event is %d\n", __func__, usbphy->last_event);
 
-	spin_lock_irqsave(&xudc->lock, flags);
+	if ((xudc->device_mode && usbphy->last_event == USB_EVENT_VBUS) ||
+	    (!xudc->device_mode && usbphy->last_event != USB_EVENT_VBUS)) {
+		dev_dbg(xudc->dev, "Same role(%d) received. Ignore",
+			xudc->device_mode);
+		return NOTIFY_OK;
+	}
 
-	if (!xudc->suspended)
-		schedule_work(&xudc->usb_role_sw_work);
+	xudc->device_mode = (usbphy->last_event == USB_EVENT_VBUS) ? true :
+								     false;
 
-	spin_unlock_irqrestore(&xudc->lock, flags);
+	phy_index = tegra_xudc_get_phy_index(xudc, usbphy);
+	dev_dbg(xudc->dev, "%s(): current phy index is %d\n", __func__,
+		phy_index);
 
-	return 0;
+	if (!xudc->suspended && phy_index != -1) {
+		xudc->curr_utmi_phy = xudc->utmi_phy[phy_index];
+		xudc->curr_usb3_phy = xudc->usb3_phy[phy_index];
+		schedule_work(&xudc->usb_role_sw_work);
+	}
+
+	return NOTIFY_OK;
 }
 
 static void tegra_xudc_plc_reset_work(struct work_struct *work)
@@ -709,9 +740,11 @@ static void tegra_xudc_plc_reset_work(struct work_struct *work)
 
 		if (pls == PORTSC_PLS_INACTIVE) {
 			dev_info(xudc->dev, "PLS = Inactive. Toggle VBUS\n");
-			tegra_xusb_padctl_set_vbus_override(xudc->padctl,
-							      false);
-			tegra_xusb_padctl_set_vbus_override(xudc->padctl, true);
+			phy_set_mode_ext(xudc->curr_utmi_phy, PHY_MODE_USB_OTG,
+					 USB_ROLE_NONE);
+			phy_set_mode_ext(xudc->curr_utmi_phy, PHY_MODE_USB_OTG,
+					 USB_ROLE_DEVICE);
+
 			xudc->wait_csc = false;
 		}
 	}
@@ -730,8 +763,7 @@ static void tegra_xudc_port_reset_war_work(struct work_struct *work)
 
 	spin_lock_irqsave(&xudc->lock, flags);
 
-	if ((xudc->device_mode == USB_ROLE_DEVICE)
-			      && xudc->wait_for_sec_prc) {
+	if (xudc->device_mode && xudc->wait_for_sec_prc) {
 		pls = (xudc_readl(xudc, PORTSC) & PORTSC_PLS_MASK) >>
 			PORTSC_PLS_SHIFT;
 		dev_dbg(xudc->dev, "pls = %x\n", pls);
@@ -739,7 +771,8 @@ static void tegra_xudc_port_reset_war_work(struct work_struct *work)
 		if (pls == PORTSC_PLS_DISABLED) {
 			dev_dbg(xudc->dev, "toggle vbus\n");
 			/* PRC doesn't complete in 100ms, toggle the vbus */
-			ret = tegra_phy_xusb_utmi_port_reset(xudc->utmi_phy);
+			ret = tegra_phy_xusb_utmi_port_reset(
+				xudc->curr_utmi_phy);
 			if (ret == 1)
 				xudc->wait_for_sec_prc = 0;
 		}
@@ -1928,6 +1961,7 @@ static int tegra_xudc_gadget_start(struct usb_gadget *gadget,
 	unsigned long flags;
 	u32 val;
 	int ret;
+	unsigned int i;
 
 	if (!driver)
 		return -EINVAL;
@@ -1963,6 +1997,10 @@ static int tegra_xudc_gadget_start(struct usb_gadget *gadget,
 		xudc_writel(xudc, val, CTRL);
 	}
 
+	for (i = 0; i < xudc->soc->num_phys; i++)
+		if (xudc->usbphy[i])
+			otg_set_peripheral(xudc->usbphy[i]->otg, gadget);
+
 	xudc->driver = driver;
 unlock:
 	dev_dbg(xudc->dev, "%s: ret value is %d", __func__, ret);
@@ -1978,11 +2016,16 @@ static int tegra_xudc_gadget_stop(struct usb_gadget *gadget)
 	struct tegra_xudc *xudc = to_xudc(gadget);
 	unsigned long flags;
 	u32 val;
+	unsigned int i;
 
 	pm_runtime_get_sync(xudc->dev);
 
 	spin_lock_irqsave(&xudc->lock, flags);
 
+	for (i = 0; i < xudc->soc->num_phys; i++)
+		if (xudc->usbphy[i])
+			otg_set_peripheral(xudc->usbphy[i]->otg, NULL);
+
 	val = xudc_readl(xudc, CTRL);
 	val &= ~(CTRL_IE | CTRL_ENABLE);
 	xudc_writel(xudc, val, CTRL);
@@ -3315,33 +3358,120 @@ static void tegra_xudc_device_params_init(struct tegra_xudc *xudc)
 	xudc_writel(xudc, val, CFG_DEV_SSPI_XFER);
 }
 
-static int tegra_xudc_phy_init(struct tegra_xudc *xudc)
+static int tegra_xudc_phy_get(struct tegra_xudc *xudc)
 {
-	int err;
+	int err = 0, usb3;
+	unsigned int i;
 
-	err = phy_init(xudc->utmi_phy);
-	if (err < 0) {
-		dev_err(xudc->dev, "utmi phy init failed: %d\n", err);
-		return err;
-	}
+	xudc->utmi_phy = devm_kcalloc(xudc->dev, xudc->soc->num_phys,
+					   sizeof(*xudc->utmi_phy), GFP_KERNEL);
+	if (!xudc->utmi_phy)
+		return -ENOMEM;
 
-	err = phy_init(xudc->usb3_phy);
-	if (err < 0) {
-		dev_err(xudc->dev, "usb3 phy init failed: %d\n", err);
-		goto exit_utmi_phy;
+	xudc->usb3_phy = devm_kcalloc(xudc->dev, xudc->soc->num_phys,
+					   sizeof(*xudc->usb3_phy), GFP_KERNEL);
+	if (!xudc->usb3_phy)
+		return -ENOMEM;
+
+	xudc->usbphy = devm_kcalloc(xudc->dev, xudc->soc->num_phys,
+					   sizeof(*xudc->usbphy), GFP_KERNEL);
+	if (!xudc->usbphy)
+		return -ENOMEM;
+
+	xudc->vbus_nb.notifier_call = tegra_xudc_vbus_notify;
+
+	for (i = 0; i < xudc->soc->num_phys; i++) {
+		char phy_name[] = "usb.-.";
+
+		/* Get USB2 phy */
+		snprintf(phy_name, sizeof(phy_name), "usb2-%d", i);
+		xudc->utmi_phy[i] = devm_phy_optional_get(xudc->dev, phy_name);
+		if (IS_ERR(xudc->utmi_phy[i])) {
+			err = PTR_ERR(xudc->utmi_phy[i]);
+			if (err != -EPROBE_DEFER)
+				dev_err(xudc->dev, "failed to get usb2-%d phy: %d\n",
+					i, err);
+
+			goto clean_up;
+		} else if (xudc->utmi_phy[i]) {
+			/* Get usb-phy, if utmi phy is available */
+			xudc->usbphy[i] = devm_usb_get_phy_by_node(xudc->dev,
+						xudc->utmi_phy[i]->dev.of_node,
+						&xudc->vbus_nb);
+			if (IS_ERR(xudc->usbphy[i])) {
+				err = PTR_ERR(xudc->usbphy[i]);
+				dev_err(xudc->dev, "failed to get usbphy-%d: %d\n",
+					i, err);
+				goto clean_up;
+			}
+		} else if (!xudc->utmi_phy[i]) {
+			/* if utmi phy is not available, ignore USB3 phy get */
+			continue;
+		}
+
+		/* Get USB3 phy */
+		usb3 = tegra_xusb_padctl_get_usb3_companion(xudc->padctl, i);
+		if (usb3 < 0)
+			continue;
+
+		snprintf(phy_name, sizeof(phy_name), "usb3-%d", usb3);
+		xudc->usb3_phy[i] = devm_phy_optional_get(xudc->dev, phy_name);
+		if (IS_ERR(xudc->usb3_phy[i])) {
+			err = PTR_ERR(xudc->usb3_phy[i]);
+			if (err != -EPROBE_DEFER)
+				dev_err(xudc->dev, "failed to get usb3-%d phy: %d\n",
+					usb3, err);
+
+			goto clean_up;
+		} else if (xudc->usb3_phy[i])
+			dev_dbg(xudc->dev, "usb3_phy-%d registered", usb3);
 	}
 
-	return 0;
+	return err;
+
+clean_up:
+	for (i = 0; i < xudc->soc->num_phys; i++) {
+		xudc->usb3_phy[i] = NULL;
+		xudc->utmi_phy[i] = NULL;
+		xudc->usbphy[i] = NULL;
+	}
 
-exit_utmi_phy:
-	phy_exit(xudc->utmi_phy);
 	return err;
 }
 
 static void tegra_xudc_phy_exit(struct tegra_xudc *xudc)
 {
-	phy_exit(xudc->usb3_phy);
-	phy_exit(xudc->utmi_phy);
+	unsigned int i;
+
+	for (i = 0; i < xudc->soc->num_phys; i++) {
+		phy_exit(xudc->usb3_phy[i]);
+		phy_exit(xudc->utmi_phy[i]);
+	}
+}
+
+static int tegra_xudc_phy_init(struct tegra_xudc *xudc)
+{
+	int err;
+	unsigned int i;
+
+	for (i = 0; i < xudc->soc->num_phys; i++) {
+		err = phy_init(xudc->utmi_phy[i]);
+		if (err < 0) {
+			dev_err(xudc->dev, "utmi phy init failed: %d\n", err);
+			goto exit_phy;
+		}
+
+		err = phy_init(xudc->usb3_phy[i]);
+		if (err < 0) {
+			dev_err(xudc->dev, "usb3 phy init failed: %d\n", err);
+			goto exit_phy;
+		}
+	}
+	return 0;
+
+exit_phy:
+	tegra_xudc_phy_exit(xudc);
+	return err;
 }
 
 static const char * const tegra210_xudc_supply_names[] = {
@@ -3369,6 +3499,7 @@ static struct tegra_xudc_soc tegra210_xudc_soc_data = {
 	.num_supplies = ARRAY_SIZE(tegra210_xudc_supply_names),
 	.clock_names = tegra210_xudc_clock_names,
 	.num_clks = ARRAY_SIZE(tegra210_xudc_clock_names),
+	.num_phys = 4,
 	.u1_enable = false,
 	.u2_enable = true,
 	.lpm_enable = false,
@@ -3381,6 +3512,7 @@ static struct tegra_xudc_soc tegra210_xudc_soc_data = {
 static struct tegra_xudc_soc tegra186_xudc_soc_data = {
 	.clock_names = tegra186_xudc_clock_names,
 	.num_clks = ARRAY_SIZE(tegra186_xudc_clock_names),
+	.num_phys = 4,
 	.u1_enable = true,
 	.u2_enable = true,
 	.lpm_enable = false,
@@ -3458,7 +3590,6 @@ static int tegra_xudc_probe(struct platform_device *pdev)
 {
 	struct tegra_xudc *xudc;
 	struct resource *res;
-	struct usb_role_switch_desc role_sx_desc = { 0 };
 	unsigned int i;
 	int err;
 
@@ -3544,19 +3675,9 @@ static int tegra_xudc_probe(struct platform_device *pdev)
 		goto put_padctl;
 	}
 
-	xudc->usb3_phy = devm_phy_optional_get(&pdev->dev, "usb3");
-	if (IS_ERR(xudc->usb3_phy)) {
-		err = PTR_ERR(xudc->usb3_phy);
-		dev_err(xudc->dev, "failed to get usb3 phy: %d\n", err);
-		goto disable_regulator;
-	}
-
-	xudc->utmi_phy = devm_phy_optional_get(&pdev->dev, "usb2");
-	if (IS_ERR(xudc->utmi_phy)) {
-		err = PTR_ERR(xudc->utmi_phy);
-		dev_err(xudc->dev, "failed to get usb2 phy: %d\n", err);
+	err = tegra_xudc_phy_get(xudc);
+	if (err)
 		goto disable_regulator;
-	}
 
 	err = tegra_xudc_powerdomain_init(xudc);
 	if (err)
@@ -3585,25 +3706,6 @@ static int tegra_xudc_probe(struct platform_device *pdev)
 	INIT_DELAYED_WORK(&xudc->port_reset_war_work,
 				tegra_xudc_port_reset_war_work);
 
-	if (of_property_read_bool(xudc->dev->of_node, "usb-role-switch")) {
-		role_sx_desc.set = tegra_xudc_usb_role_sw_set;
-		role_sx_desc.fwnode = dev_fwnode(xudc->dev);
-		role_sx_desc.driver_data = xudc;
-
-		xudc->usb_role_sw = usb_role_switch_register(xudc->dev,
-							&role_sx_desc);
-		if (IS_ERR(xudc->usb_role_sw)) {
-			err = PTR_ERR(xudc->usb_role_sw);
-			dev_err(xudc->dev, "Failed to register USB role SW: %d",
-					   err);
-			goto free_eps;
-		}
-	} else {
-		/* Set the mode as device mode and this keeps phy always ON */
-		dev_info(xudc->dev, "Set usb role to device mode always");
-		schedule_work(&xudc->usb_role_sw_work);
-	}
-
 	pm_runtime_enable(&pdev->dev);
 
 	xudc->gadget.ops = &tegra_xudc_gadget_ops;
@@ -3638,15 +3740,12 @@ put_padctl:
 static int tegra_xudc_remove(struct platform_device *pdev)
 {
 	struct tegra_xudc *xudc = platform_get_drvdata(pdev);
+	unsigned int i;
 
 	pm_runtime_get_sync(xudc->dev);
 
 	cancel_delayed_work(&xudc->plc_reset_work);
-
-	if (xudc->usb_role_sw) {
-		usb_role_switch_unregister(xudc->usb_role_sw);
-		cancel_work_sync(&xudc->usb_role_sw_work);
-	}
+	cancel_work_sync(&xudc->usb_role_sw_work);
 
 	usb_del_gadget_udc(&xudc->gadget);
 
@@ -3657,8 +3756,10 @@ static int tegra_xudc_remove(struct platform_device *pdev)
 
 	regulator_bulk_disable(xudc->soc->num_supplies, xudc->supplies);
 
-	phy_power_off(xudc->utmi_phy);
-	phy_power_off(xudc->usb3_phy);
+	for (i = 0; i < xudc->soc->num_phys; i++) {
+		phy_power_off(xudc->utmi_phy[i]);
+		phy_power_off(xudc->usb3_phy[i]);
+	}
 
 	tegra_xudc_phy_exit(xudc);
 
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index a6e36b3c968f..2eaf5c0af80c 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -24,6 +24,9 @@
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 #include <linux/slab.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/role.h>
 #include <soc/tegra/pmc.h>
 
 #include "xhci.h"
@@ -204,6 +207,7 @@ struct tegra_xusb_soc {
 	bool scale_ss_clock;
 	bool has_ipfs;
 	bool lpm_support;
+	bool otg_reset_sspi;
 };
 
 struct tegra_xusb_context {
@@ -251,6 +255,14 @@ struct tegra_xusb {
 	struct phy **phys;
 	unsigned int num_phys;
 
+	struct usb_phy **usbphy;
+	unsigned int num_usb_phys;
+	int otg_usb2_port;
+	int otg_usb3_port;
+	bool host_mode;
+	struct notifier_block id_nb;
+	struct work_struct id_work;
+
 	/* Firmware loading related */
 	struct {
 		size_t size;
@@ -1082,6 +1094,205 @@ static int tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra)
 	return err;
 }
 
+static void tegra_xhci_set_port_power(struct tegra_xusb *tegra, bool main,
+						 bool set)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
+	struct usb_hcd *hcd = main ?  xhci->main_hcd : xhci->shared_hcd;
+	unsigned int wait = (!main && !set) ? 1000 : 10;
+	u16 typeReq = set ? SetPortFeature : ClearPortFeature;
+	u16 wIndex = main ? tegra->otg_usb2_port + 1 : tegra->otg_usb3_port + 1;
+	u32 status;
+	u32 stat_power = main ? USB_PORT_STAT_POWER : USB_SS_PORT_STAT_POWER;
+	u32 status_val = set ? stat_power : 0;
+
+	dev_dbg(tegra->dev, "%s():%s %s port power\n", __func__,
+		set ? "set" : "clear", main ? "HS" : "SS");
+
+	hcd->driver->hub_control(hcd, typeReq, USB_PORT_FEAT_POWER, wIndex,
+				 NULL, 0);
+
+	do {
+		tegra_xhci_hc_driver.hub_control(hcd, GetPortStatus, 0, wIndex,
+					(char *) &status, sizeof(status));
+		if (status_val == (status & stat_power))
+			break;
+
+		if (!main && !set)
+			usleep_range(600, 700);
+		else
+			usleep_range(10, 20);
+	} while (--wait > 0);
+
+	if (status_val != (status & stat_power))
+		dev_info(tegra->dev, "failed to %s %s PP %d\n",
+						set ? "set" : "clear",
+						main ? "HS" : "SS", status);
+}
+
+static struct phy *tegra_xusb_get_phy(struct tegra_xusb *tegra, char *name,
+								int port)
+{
+	unsigned int i, phy_count = 0;
+
+	for (i = 0; i < tegra->soc->num_types; i++) {
+		if (!strncmp(tegra->soc->phy_types[i].name, "usb2",
+							    strlen(name)))
+			return tegra->phys[phy_count+port];
+
+		phy_count += tegra->soc->phy_types[i].num;
+	}
+
+	return NULL;
+}
+
+static void tegra_xhci_id_work(struct work_struct *work)
+{
+	struct tegra_xusb *tegra = container_of(work, struct tegra_xusb,
+						id_work);
+	struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
+	struct tegra_xusb_mbox_msg msg;
+	struct phy *phy = tegra_xusb_get_phy(tegra, "usb2",
+						    tegra->otg_usb2_port);
+	u32 status;
+	int ret;
+
+	dev_dbg(tegra->dev, "host mode %s\n", tegra->host_mode ? "on" : "off");
+
+	mutex_lock(&tegra->lock);
+
+	if (tegra->host_mode)
+		phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_HOST);
+	else
+		phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_NONE);
+
+	mutex_unlock(&tegra->lock);
+
+	if (tegra->host_mode) {
+		/* switch to host mode */
+		if (tegra->otg_usb3_port >= 0) {
+			if (tegra->soc->otg_reset_sspi) {
+				/* set PP=0 */
+				tegra_xhci_hc_driver.hub_control(
+					xhci->shared_hcd, GetPortStatus,
+					0, tegra->otg_usb3_port+1,
+					(char *) &status, sizeof(status));
+				if (status & USB_SS_PORT_STAT_POWER)
+					tegra_xhci_set_port_power(tegra, false,
+								  false);
+
+				/* reset OTG port SSPI */
+				msg.cmd = MBOX_CMD_RESET_SSPI;
+				msg.data = tegra->otg_usb3_port+1;
+
+				ret = tegra_xusb_mbox_send(tegra, &msg);
+				if (ret < 0) {
+					dev_info(tegra->dev,
+						"failed to RESET_SSPI %d\n",
+						ret);
+				}
+			}
+
+			tegra_xhci_set_port_power(tegra, false, true);
+		}
+
+		tegra_xhci_set_port_power(tegra, true, true);
+
+	} else {
+		if (tegra->otg_usb3_port >= 0)
+			tegra_xhci_set_port_power(tegra, false, false);
+
+		tegra_xhci_set_port_power(tegra, true, false);
+	}
+}
+
+static int tegra_xusb_get_usb2_port(struct tegra_xusb *tegra,
+					      struct usb_phy *usbphy)
+{
+	unsigned int i;
+
+	for (i = 0; i < tegra->num_usb_phys; i++) {
+		if (tegra->usbphy[i] && usbphy == tegra->usbphy[i])
+			return i;
+	}
+
+	return -1;
+}
+
+static int tegra_xhci_id_notify(struct notifier_block *nb,
+					 unsigned long action, void *data)
+{
+	struct tegra_xusb *tegra = container_of(nb, struct tegra_xusb,
+						    id_nb);
+	struct usb_phy *usbphy = (struct usb_phy *)data;
+
+	dev_dbg(tegra->dev, "%s(): action is %d", __func__, usbphy->last_event);
+
+	if ((tegra->host_mode && usbphy->last_event == USB_EVENT_ID) ||
+		(!tegra->host_mode && usbphy->last_event != USB_EVENT_ID)) {
+		dev_dbg(tegra->dev, "Same role(%d) received. Ignore",
+			tegra->host_mode);
+		return NOTIFY_OK;
+	}
+
+	tegra->otg_usb2_port = tegra_xusb_get_usb2_port(tegra, usbphy);
+	tegra->otg_usb3_port = tegra_xusb_padctl_get_usb3_companion(
+							tegra->padctl,
+							tegra->otg_usb2_port);
+
+	tegra->host_mode = (usbphy->last_event == USB_EVENT_ID) ? true : false;
+
+	schedule_work(&tegra->id_work);
+
+	return NOTIFY_OK;
+}
+
+static int tegra_xusb_init_usb_phy(struct tegra_xusb *tegra)
+{
+	unsigned int i;
+
+	tegra->usbphy = devm_kcalloc(tegra->dev, tegra->num_usb_phys,
+				   sizeof(*tegra->usbphy), GFP_KERNEL);
+	if (!tegra->usbphy)
+		return -ENOMEM;
+
+	INIT_WORK(&tegra->id_work, tegra_xhci_id_work);
+	tegra->id_nb.notifier_call = tegra_xhci_id_notify;
+
+	for (i = 0; i < tegra->num_usb_phys; i++) {
+		struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i);
+
+		if (!phy)
+			continue;
+
+		tegra->usbphy[i] = devm_usb_get_phy_by_node(tegra->dev,
+							phy->dev.of_node,
+							&tegra->id_nb);
+		if (!IS_ERR(tegra->usbphy[i])) {
+			dev_dbg(tegra->dev, "usbphy-%d registered", i);
+			otg_set_host(tegra->usbphy[i]->otg, &tegra->hcd->self);
+		} else {
+			/*
+			 * usb-phy is optional, continue if its not available.
+			 */
+			tegra->usbphy[i] = NULL;
+		}
+	}
+
+	return 0;
+}
+
+static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra)
+{
+	unsigned int i;
+
+	cancel_work_sync(&tegra->id_work);
+
+	for (i = 0; i < tegra->num_usb_phys; i++)
+		if (tegra->usbphy[i])
+			otg_set_host(tegra->usbphy[i]->otg, NULL);
+}
+
 static int tegra_xusb_probe(struct platform_device *pdev)
 {
 	struct tegra_xusb *tegra;
@@ -1255,8 +1466,11 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto put_powerdomains;
 	}
 
-	for (i = 0; i < tegra->soc->num_types; i++)
+	for (i = 0; i < tegra->soc->num_types; i++) {
+		if (!strncmp(tegra->soc->phy_types[i].name, "usb2", 4))
+			tegra->num_usb_phys = tegra->soc->phy_types[i].num;
 		tegra->num_phys += tegra->soc->phy_types[i].num;
+	}
 
 	tegra->phys = devm_kcalloc(&pdev->dev, tegra->num_phys,
 				   sizeof(*tegra->phys), GFP_KERNEL);
@@ -1385,6 +1599,12 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto remove_usb3;
 	}
 
+	err = tegra_xusb_init_usb_phy(tegra);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to init USB PHY: %d\n", err);
+		goto remove_usb3;
+	}
+
 	return 0;
 
 remove_usb3:
@@ -1421,6 +1641,8 @@ static int tegra_xusb_remove(struct platform_device *pdev)
 	struct tegra_xusb *tegra = platform_get_drvdata(pdev);
 	struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
 
+	tegra_xusb_deinit_usb_phy(tegra);
+
 	usb_remove_hcd(xhci->shared_hcd);
 	usb_put_hcd(xhci->shared_hcd);
 	xhci->shared_hcd = NULL;
@@ -1695,6 +1917,7 @@ static const struct tegra_xusb_soc tegra124_soc = {
 	},
 	.scale_ss_clock = true,
 	.has_ipfs = true,
+	.otg_reset_sspi = false,
 	.mbox = {
 		.cmd = 0xe4,
 		.data_in = 0xe8,
@@ -1734,6 +1957,7 @@ static const struct tegra_xusb_soc tegra210_soc = {
 	},
 	.scale_ss_clock = false,
 	.has_ipfs = true,
+	.otg_reset_sspi = true,
 	.mbox = {
 		.cmd = 0xe4,
 		.data_in = 0xe8,
@@ -1774,6 +1998,7 @@ static const struct tegra_xusb_soc tegra186_soc = {
 	},
 	.scale_ss_clock = false,
 	.has_ipfs = false,
+	.otg_reset_sspi = false,
 	.mbox = {
 		.cmd = 0xe4,
 		.data_in = 0xe8,
@@ -1804,6 +2029,7 @@ static const struct tegra_xusb_soc tegra194_soc = {
 	},
 	.scale_ss_clock = false,
 	.has_ipfs = false,
+	.otg_reset_sspi = false,
 	.mbox = {
 		.cmd = 0x68,
 		.data_in = 0x6c,