usb: cdns3: Split core.c into cdns3-plat and core.c file

Patch splits file core.c into core.c containing the common reusable code
and cnd3-plat.c containing device platform specific code. These changes
are required to make possible reuse DRD part of CDNS3 driver in CDNSP
driver.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Tested-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

1 files changed, 24 insertions, 260 deletions

diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
index 04990812181d..7b67a7c74586 100644
--- a/drivers/usb/cdns3/core.c
+++ b/drivers/usb/cdns3/core.c
@@ -385,26 +385,6 @@ 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
@@ -431,16 +411,13 @@ static irqreturn_t cdns3_wakeup_irq(int irq, void *data)
 
 /**
  * cdns3_probe - probe for cdns3 core device
- * @pdev: Pointer to cdns3 core platform device
+ * @cdns: Pointer to cdnsp structure.
  *
  * Returns 0 on success otherwise negative errno
  */
-static int cdns3_probe(struct platform_device *pdev)
+int cdns3_init(struct cdns3 *cdns)
 {
-	struct device *dev = &pdev->dev;
-	struct resource	*res;
-	struct cdns3 *cdns;
-	void __iomem *regs;
+	struct device *dev = cdns->dev;
 	int ret;
 
 	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
@@ -449,87 +426,8 @@ static int cdns3_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
-	if (!cdns)
-		return -ENOMEM;
-
-	cdns->dev = dev;
-	cdns->pdata = dev_get_platdata(dev);
-
-	platform_set_drvdata(pdev, cdns);
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
-	if (!res) {
-		dev_err(dev, "missing host IRQ\n");
-		return -ENODEV;
-	}
-
-	cdns->xhci_res[0] = *res;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci");
-	if (!res) {
-		dev_err(dev, "couldn't get xhci resource\n");
-		return -ENXIO;
-	}
-
-	cdns->xhci_res[1] = *res;
-
-	cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");
-	if (cdns->dev_irq < 0)
-		return cdns->dev_irq;
-
-	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 < 0)
-		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");
-	if (IS_ERR(cdns->usb2_phy))
-		return PTR_ERR(cdns->usb2_phy);
-
-	ret = phy_init(cdns->usb2_phy);
-	if (ret)
-		return ret;
-
-	cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy");
-	if (IS_ERR(cdns->usb3_phy))
-		return PTR_ERR(cdns->usb3_phy);
-
-	ret = phy_init(cdns->usb3_phy);
-	if (ret)
-		goto err1;
-
-	ret = set_phy_power_on(cdns);
-	if (ret)
-		goto err2;
-
 	if (device_property_read_bool(dev, "usb-role-switch")) {
 		struct usb_role_switch_desc sw_desc = { };
 
@@ -541,9 +439,8 @@ static int cdns3_probe(struct platform_device *pdev)
 
 		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;
+			return PTR_ERR(cdns->role_sw);
 		}
 	}
 
@@ -555,153 +452,50 @@ static int cdns3_probe(struct platform_device *pdev)
 
 		if (ret) {
 			dev_err(cdns->dev, "couldn't register wakeup irq handler\n");
-			goto err4;
+			goto role_switch_unregister;
 		}
 	}
 
 	ret = cdns3_drd_init(cdns);
 	if (ret)
-		goto err4;
+		goto init_failed;
 
 	ret = cdns3_core_init_role(cdns);
 	if (ret)
-		goto err4;
+		goto init_failed;
 
 	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,
-	 * and we also needs a small delay to avoid frequently entering low
-	 * power mode.
-	 */
-	pm_runtime_set_autosuspend_delay(dev, 20);
-	pm_runtime_mark_last_busy(dev);
-	pm_runtime_use_autosuspend(dev);
 	dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
 
 	return 0;
-err4:
+init_failed:
 	cdns3_drd_exit(cdns);
+role_switch_unregister:
 	if (cdns->role_sw)
 		usb_role_switch_unregister(cdns->role_sw);
-err3:
-	set_phy_power_off(cdns);
-err2:
-	phy_exit(cdns->usb3_phy);
-err1:
-	phy_exit(cdns->usb2_phy);
 
 	return ret;
 }
 
 /**
  * cdns3_remove - unbind drd driver and clean up
- * @pdev: Pointer to Linux platform device
+ * @cdns: Pointer to cdnsp structure.
  *
  * Returns 0 on success otherwise negative errno
  */
-static int cdns3_remove(struct platform_device *pdev)
+int cdns3_remove(struct cdns3 *cdns)
 {
-	struct cdns3 *cdns = platform_get_drvdata(pdev);
-
-	pm_runtime_get_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
-	pm_runtime_put_noidle(&pdev->dev);
 	cdns3_exit_roles(cdns);
 	usb_role_switch_unregister(cdns->role_sw);
-	set_phy_power_off(cdns);
-	phy_exit(cdns->usb2_phy);
-	phy_exit(cdns->usb3_phy);
-	return 0;
-}
-
-#ifdef CONFIG_PM
-
-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->in_lpm)
-		return 0;
-
-	if (PMSG_IS_AUTO(msg))
-		wakeup = true;
-	else
-		wakeup = device_may_wakeup(dev);
-
-	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_controller_resume(struct device *dev, pm_message_t msg)
-{
-	struct cdns3 *cdns = dev_get_drvdata(dev);
-	int ret;
-	unsigned long flags;
-
-	if (!cdns->in_lpm)
-		return 0;
-
-	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);
-
-	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)
+int cdns3_suspend(struct cdns3 *cdns)
 {
-	struct cdns3 *cdns = dev_get_drvdata(dev);
+	struct device *dev = cdns->dev;
 	unsigned long flags;
 
 	if (pm_runtime_status_suspended(dev))
@@ -713,52 +507,22 @@ static int cdns3_suspend(struct device *dev)
 		spin_unlock_irqrestore(&cdns->lock, flags);
 	}
 
-	return cdns3_controller_suspend(dev, PMSG_SUSPEND);
+	return 0;
 }
 
-static int cdns3_resume(struct device *dev)
+int cdns3_resume(struct cdns3 *cdns, u8 set_active)
 {
-	int ret;
+	struct device *dev = cdns->dev;
 
-	ret = cdns3_controller_resume(dev, PMSG_RESUME);
-	if (ret)
-		return ret;
+	if (cdns->roles[cdns->role]->resume)
+		cdns->roles[cdns->role]->resume(cdns, false);
 
-	pm_runtime_disable(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
+	if (set_active) {
+		pm_runtime_disable(dev);
+		pm_runtime_set_active(dev);
+		pm_runtime_enable(dev);
+	}
 
-	return ret;
+	return 0;
 }
 #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
-static const struct of_device_id of_cdns3_match[] = {
-	{ .compatible = "cdns,usb3" },
-	{ },
-};
-MODULE_DEVICE_TABLE(of, of_cdns3_match);
-#endif
-
-static struct platform_driver cdns3_driver = {
-	.probe		= cdns3_probe,
-	.remove		= cdns3_remove,
-	.driver		= {
-		.name	= "cdns-usb3",
-		.of_match_table	= of_match_ptr(of_cdns3_match),
-		.pm	= &cdns3_pm_ops,
-	},
-};
-
-module_platform_driver(cdns3_driver);
-
-MODULE_ALIAS("platform:cdns3");
-MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");