1 files changed, 204 insertions, 84 deletions

diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
index 19bbb5b7e6b6..1991cb5cf6bf 100644
--- a/drivers/usb/cdns3/core.c
+++ b/drivers/usb/cdns3/core.c
@@ -27,13 +27,6 @@
 
 static int cdns3_idle_init(struct cdns3 *cdns);
 
-static inline
-struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns)
-{
-	WARN_ON(!cdns->roles[cdns->role]);
-	return cdns->roles[cdns->role];
-}
-
 static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role)
 {
 	int ret;
@@ -93,7 +86,7 @@ static int cdns3_core_init_role(struct cdns3 *cdns)
 	struct device *dev = cdns->dev;
 	enum usb_dr_mode best_dr_mode;
 	enum usb_dr_mode dr_mode;
-	int ret = 0;
+	int ret;
 
 	dr_mode = usb_get_dr_mode(dev);
 	cdns->role = USB_ROLE_NONE;
@@ -184,7 +177,7 @@ static int cdns3_core_init_role(struct cdns3 *cdns)
 		goto err;
 	}
 
-	return ret;
+	return 0;
 err:
 	cdns3_exit_roles(cdns);
 	return ret;
@@ -198,11 +191,17 @@ err:
  */
 static enum usb_role cdns3_hw_role_state_machine(struct cdns3 *cdns)
 {
-	enum usb_role role;
+	enum usb_role role = USB_ROLE_NONE;
 	int id, vbus;
 
-	if (cdns->dr_mode != USB_DR_MODE_OTG)
-		goto not_otg;
+	if (cdns->dr_mode != USB_DR_MODE_OTG) {
+		if (cdns3_is_host(cdns))
+			role = USB_ROLE_HOST;
+		if (cdns3_is_device(cdns))
+			role = USB_ROLE_DEVICE;
+
+		return role;
+	}
 
 	id = cdns3_get_id(cdns);
 	vbus = cdns3_get_vbus(cdns);
@@ -239,14 +238,6 @@ static enum usb_role cdns3_hw_role_state_machine(struct cdns3 *cdns)
 	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);
 
 	return role;
-
-not_otg:
-	if (cdns3_is_host(cdns))
-		role = USB_ROLE_HOST;
-	if (cdns3_is_device(cdns))
-		role = USB_ROLE_DEVICE;
-
-	return role;
 }
 
 static int cdns3_idle_role_start(struct cdns3 *cdns)
@@ -282,13 +273,17 @@ static int cdns3_idle_init(struct cdns3 *cdns)
 
 /**
  * cdns3_hw_role_switch - switch roles based on HW state
- * @cdns3: controller
+ * @cdns: controller
  */
 int cdns3_hw_role_switch(struct cdns3 *cdns)
 {
 	enum usb_role real_role, current_role;
 	int ret = 0;
 
+	/* Depends on role switch class */
+	if (cdns->role_sw)
+		return 0;
+
 	pm_runtime_get_sync(cdns->dev);
 
 	current_role = cdns->role;
@@ -320,7 +315,7 @@ exit:
 /**
  * cdsn3_role_get - get current role of controller.
  *
- * @dev: Pointer to device structure
+ * @sw: pointer to USB role switch structure
  *
  * Returns role
  */
@@ -334,8 +329,8 @@ static enum usb_role cdns3_role_get(struct usb_role_switch *sw)
 /**
  * cdns3_role_set - set current role of controller.
  *
- * @dev: pointer to device object
- * @role - the previous role
+ * @sw: pointer to USB role switch structure
+ * @role: the previous role
  * Handles below events:
  * - Role switch for dual-role devices
  * - USB_ROLE_GADGET <--> USB_ROLE_NONE for peripheral-only devices
@@ -356,7 +351,6 @@ static int cdns3_role_set(struct usb_role_switch *sw, enum usb_role role)
 		case USB_ROLE_HOST:
 			break;
 		default:
-			ret = -EPERM;
 			goto pm_put;
 		}
 	}
@@ -367,23 +361,64 @@ static int cdns3_role_set(struct usb_role_switch *sw, enum usb_role role)
 		case USB_ROLE_DEVICE:
 			break;
 		default:
-			ret = -EPERM;
 			goto pm_put;
 		}
 	}
 
 	cdns3_role_stop(cdns);
 	ret = cdns3_role_start(cdns, role);
-	if (ret) {
+	if (ret)
 		dev_err(cdns->dev, "set role %d has failed\n", role);
-		ret = -EPERM;
-	}
 
 pm_put:
 	pm_runtime_put_sync(cdns->dev);
 	return ret;
 }
 
+static int set_phy_power_on(struct cdns3 *cdns)
+{
+	int ret;
+
+	ret = phy_power_on(cdns->usb2_phy);
+	if (ret)
+		return ret;
+
+	ret = phy_power_on(cdns->usb3_phy);
+	if (ret)
+		phy_power_off(cdns->usb2_phy);
+
+	return ret;
+}
+
+static void set_phy_power_off(struct cdns3 *cdns)
+{
+	phy_power_off(cdns->usb3_phy);
+	phy_power_off(cdns->usb2_phy);
+}
+
+/**
+ * cdns3_wakeup_irq - interrupt handler for wakeup events
+ * @irq: irq number for cdns3 core device
+ * @data: structure of cdns3
+ *
+ * Returns IRQ_HANDLED or IRQ_NONE
+ */
+static irqreturn_t cdns3_wakeup_irq(int irq, void *data)
+{
+	struct cdns3 *cdns = data;
+
+	if (cdns->in_lpm) {
+		disable_irq_nosync(irq);
+		cdns->wakeup_pending = true;
+		if ((cdns->role == USB_ROLE_HOST) && cdns->host_dev)
+			pm_request_resume(&cdns->host_dev->dev);
+
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+}
+
 /**
  * cdns3_probe - probe for cdns3 core device
  * @pdev: Pointer to cdns3 core platform device
@@ -392,7 +427,6 @@ pm_put:
  */
 static int cdns3_probe(struct platform_device *pdev)
 {
-	struct usb_role_switch_desc sw_desc = { };
 	struct device *dev = &pdev->dev;
 	struct resource	*res;
 	struct cdns3 *cdns;
@@ -402,7 +436,7 @@ static int cdns3_probe(struct platform_device *pdev)
 	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
 	if (ret) {
 		dev_err(dev, "error setting dma mask: %d\n", ret);
-		return -ENODEV;
+		return ret;
 	}
 
 	cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
@@ -410,6 +444,7 @@ static int cdns3_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	cdns->dev = dev;
+	cdns->pdata = dev_get_platdata(dev);
 
 	platform_set_drvdata(pdev, cdns);
 
@@ -430,35 +465,39 @@ static int cdns3_probe(struct platform_device *pdev)
 	cdns->xhci_res[1] = *res;
 
 	cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");
-	if (cdns->dev_irq == -EPROBE_DEFER)
-		return cdns->dev_irq;
-
 	if (cdns->dev_irq < 0)
-		dev_err(dev, "couldn't get peripheral irq\n");
+		return cdns->dev_irq;
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dev");
-	regs = devm_ioremap_resource(dev, res);
+	regs = devm_platform_ioremap_resource_byname(pdev, "dev");
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 	cdns->dev_regs	= regs;
 
 	cdns->otg_irq = platform_get_irq_byname(pdev, "otg");
-	if (cdns->otg_irq == -EPROBE_DEFER)
+	if (cdns->otg_irq < 0)
 		return cdns->otg_irq;
 
-	if (cdns->otg_irq < 0) {
-		dev_err(dev, "couldn't get otg irq\n");
-		return cdns->otg_irq;
-	}
-
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg");
 	if (!res) {
 		dev_err(dev, "couldn't get otg resource\n");
 		return -ENXIO;
 	}
 
+	cdns->phyrst_a_enable = device_property_read_bool(dev, "cdns,phyrst-a-enable");
+
 	cdns->otg_res = *res;
 
+	cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
+	if (cdns->wakeup_irq == -EPROBE_DEFER)
+		return cdns->wakeup_irq;
+	else if (cdns->wakeup_irq == 0)
+		return -EINVAL;
+
+	if (cdns->wakeup_irq < 0) {
+		dev_dbg(dev, "couldn't get wakeup irq\n");
+		cdns->wakeup_irq = 0x0;
+	}
+
 	mutex_init(&cdns->mutex);
 
 	cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy");
@@ -477,39 +516,53 @@ static int cdns3_probe(struct platform_device *pdev)
 	if (ret)
 		goto err1;
 
-	ret = phy_power_on(cdns->usb2_phy);
+	ret = set_phy_power_on(cdns);
 	if (ret)
 		goto err2;
 
-	ret = phy_power_on(cdns->usb3_phy);
-	if (ret)
-		goto err3;
+	if (device_property_read_bool(dev, "usb-role-switch")) {
+		struct usb_role_switch_desc sw_desc = { };
 
-	sw_desc.set = cdns3_role_set;
-	sw_desc.get = cdns3_role_get;
-	sw_desc.allow_userspace_control = true;
-	sw_desc.driver_data = cdns;
-	if (device_property_read_bool(dev, "usb-role-switch"))
+		sw_desc.set = cdns3_role_set;
+		sw_desc.get = cdns3_role_get;
+		sw_desc.allow_userspace_control = true;
+		sw_desc.driver_data = cdns;
 		sw_desc.fwnode = dev->fwnode;
 
-	cdns->role_sw = usb_role_switch_register(dev, &sw_desc);
-	if (IS_ERR(cdns->role_sw)) {
-		ret = PTR_ERR(cdns->role_sw);
-		dev_warn(dev, "Unable to register Role Switch\n");
-		goto err4;
+		cdns->role_sw = usb_role_switch_register(dev, &sw_desc);
+		if (IS_ERR(cdns->role_sw)) {
+			ret = PTR_ERR(cdns->role_sw);
+			dev_warn(dev, "Unable to register Role Switch\n");
+			goto err3;
+		}
+	}
+
+	if (cdns->wakeup_irq) {
+		ret = devm_request_irq(cdns->dev, cdns->wakeup_irq,
+						cdns3_wakeup_irq,
+						IRQF_SHARED,
+						dev_name(cdns->dev), cdns);
+
+		if (ret) {
+			dev_err(cdns->dev, "couldn't register wakeup irq handler\n");
+			goto err4;
+		}
 	}
 
 	ret = cdns3_drd_init(cdns);
 	if (ret)
-		goto err5;
+		goto err4;
 
 	ret = cdns3_core_init_role(cdns);
 	if (ret)
-		goto err5;
+		goto err4;
 
+	spin_lock_init(&cdns->lock);
 	device_set_wakeup_capable(dev, true);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
+	if (!(cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)))
+		pm_runtime_forbid(dev);
 
 	/*
 	 * The controller needs less time between bus and controller suspend,
@@ -522,14 +575,12 @@ static int cdns3_probe(struct platform_device *pdev)
 	dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
 
 	return 0;
-err5:
-	cdns3_drd_exit(cdns);
-	usb_role_switch_unregister(cdns->role_sw);
 err4:
-	phy_power_off(cdns->usb3_phy);
-
+	cdns3_drd_exit(cdns);
+	if (cdns->role_sw)
+		usb_role_switch_unregister(cdns->role_sw);
 err3:
-	phy_power_off(cdns->usb2_phy);
+	set_phy_power_off(cdns);
 err2:
 	phy_exit(cdns->usb3_phy);
 err1:
@@ -553,59 +604,128 @@ static int cdns3_remove(struct platform_device *pdev)
 	pm_runtime_put_noidle(&pdev->dev);
 	cdns3_exit_roles(cdns);
 	usb_role_switch_unregister(cdns->role_sw);
-	phy_power_off(cdns->usb2_phy);
-	phy_power_off(cdns->usb3_phy);
+	set_phy_power_off(cdns);
 	phy_exit(cdns->usb2_phy);
 	phy_exit(cdns->usb3_phy);
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
 
-static int cdns3_suspend(struct device *dev)
+static int cdns3_set_platform_suspend(struct device *dev,
+		bool suspend, bool wakeup)
+{
+	struct cdns3 *cdns = dev_get_drvdata(dev);
+	int ret = 0;
+
+	if (cdns->pdata && cdns->pdata->platform_suspend)
+		ret = cdns->pdata->platform_suspend(dev, suspend, wakeup);
+
+	return ret;
+}
+
+static int cdns3_controller_suspend(struct device *dev, pm_message_t msg)
 {
 	struct cdns3 *cdns = dev_get_drvdata(dev);
+	bool wakeup;
 	unsigned long flags;
 
-	if (cdns->role == USB_ROLE_HOST)
+	if (cdns->in_lpm)
 		return 0;
 
-	if (pm_runtime_status_suspended(dev))
-		pm_runtime_resume(dev);
+	if (PMSG_IS_AUTO(msg))
+		wakeup = true;
+	else
+		wakeup = device_may_wakeup(dev);
 
-	if (cdns->roles[cdns->role]->suspend) {
-		spin_lock_irqsave(&cdns->gadget_dev->lock, flags);
-		cdns->roles[cdns->role]->suspend(cdns, false);
-		spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);
-	}
+	cdns3_set_platform_suspend(cdns->dev, true, wakeup);
+	set_phy_power_off(cdns);
+	spin_lock_irqsave(&cdns->lock, flags);
+	cdns->in_lpm = true;
+	spin_unlock_irqrestore(&cdns->lock, flags);
+	dev_dbg(cdns->dev, "%s ends\n", __func__);
 
 	return 0;
 }
 
-static int cdns3_resume(struct device *dev)
+static int cdns3_controller_resume(struct device *dev, pm_message_t msg)
 {
 	struct cdns3 *cdns = dev_get_drvdata(dev);
+	int ret;
 	unsigned long flags;
 
-	if (cdns->role == USB_ROLE_HOST)
+	if (!cdns->in_lpm)
 		return 0;
 
-	if (cdns->roles[cdns->role]->resume) {
-		spin_lock_irqsave(&cdns->gadget_dev->lock, flags);
+	ret = set_phy_power_on(cdns);
+	if (ret)
+		return ret;
+
+	cdns3_set_platform_suspend(cdns->dev, false, false);
+
+	spin_lock_irqsave(&cdns->lock, flags);
+	if (cdns->roles[cdns->role]->resume && !PMSG_IS_AUTO(msg))
 		cdns->roles[cdns->role]->resume(cdns, false);
-		spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);
+
+	cdns->in_lpm = false;
+	spin_unlock_irqrestore(&cdns->lock, flags);
+	if (cdns->wakeup_pending) {
+		cdns->wakeup_pending = false;
+		enable_irq(cdns->wakeup_irq);
 	}
+	dev_dbg(cdns->dev, "%s ends\n", __func__);
+
+	return ret;
+}
+
+static int cdns3_runtime_suspend(struct device *dev)
+{
+	return cdns3_controller_suspend(dev, PMSG_AUTO_SUSPEND);
+}
+
+static int cdns3_runtime_resume(struct device *dev)
+{
+	return cdns3_controller_resume(dev, PMSG_AUTO_RESUME);
+}
+#ifdef CONFIG_PM_SLEEP
+
+static int cdns3_suspend(struct device *dev)
+{
+	struct cdns3 *cdns = dev_get_drvdata(dev);
+	unsigned long flags;
+
+	if (pm_runtime_status_suspended(dev))
+		pm_runtime_resume(dev);
+
+	if (cdns->roles[cdns->role]->suspend) {
+		spin_lock_irqsave(&cdns->lock, flags);
+		cdns->roles[cdns->role]->suspend(cdns, false);
+		spin_unlock_irqrestore(&cdns->lock, flags);
+	}
+
+	return cdns3_controller_suspend(dev, PMSG_SUSPEND);
+}
+
+static int cdns3_resume(struct device *dev)
+{
+	int ret;
+
+	ret = cdns3_controller_resume(dev, PMSG_RESUME);
+	if (ret)
+		return ret;
 
 	pm_runtime_disable(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
 
-	return 0;
+	return ret;
 }
-#endif
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
 
 static const struct dev_pm_ops cdns3_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(cdns3_suspend, cdns3_resume)
+	SET_RUNTIME_PM_OPS(cdns3_runtime_suspend, cdns3_runtime_resume, NULL)
 };
 
 #ifdef CONFIG_OF