1 files changed, 170 insertions, 32 deletions

diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
index 5c1586ec7824..a0f73d4711ae 100644
--- a/drivers/usb/cdns3/core.c
+++ b/drivers/usb/cdns3/core.c
@@ -280,6 +280,10 @@ 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;
@@ -371,6 +375,50 @@ pm_put:
 	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
@@ -397,6 +445,7 @@ static int cdns3_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	cdns->dev = dev;
+	cdns->pdata = dev_get_platdata(dev);
 
 	platform_set_drvdata(pdev, cdns);
 
@@ -443,8 +492,21 @@ static int cdns3_probe(struct platform_device *pdev)
 		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");
@@ -463,14 +525,10 @@ 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;
-
 	sw_desc.set = cdns3_role_set;
 	sw_desc.get = cdns3_role_get;
 	sw_desc.allow_userspace_control = true;
@@ -482,20 +540,34 @@ static int cdns3_probe(struct platform_device *pdev)
 	if (IS_ERR(cdns->role_sw)) {
 		ret = PTR_ERR(cdns->role_sw);
 		dev_warn(dev, "Unable to register Role Switch\n");
-		goto err4;
+		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 err3;
+		}
 	}
 
 	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);
+	pm_runtime_forbid(dev);
 
 	/*
 	 * The controller needs less time between bus and controller suspend,
@@ -508,14 +580,11 @@ static int cdns3_probe(struct platform_device *pdev)
 	dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
 
 	return 0;
-err5:
+err4:
 	cdns3_drd_exit(cdns);
 	usb_role_switch_unregister(cdns->role_sw);
-err4:
-	phy_power_off(cdns->usb3_phy);
-
 err3:
-	phy_power_off(cdns->usb2_phy);
+	set_phy_power_off(cdns);
 err2:
 	phy_exit(cdns->usb3_phy);
 err1:
@@ -539,59 +608,128 @@ 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