1 files changed, 127 insertions, 57 deletions

diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index aae5328ac77..f9fb8adb785 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -6,10 +6,14 @@
  *
  * Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2  of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  */
 
 #include <linux/module.h>
@@ -20,40 +24,42 @@
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
 #include <linux/usb/otg.h>
-#include <linux/usb/nop-usb-xceiv.h>
+#include <linux/usb/usb_phy_generic.h>
 #include <linux/of.h>
-
-#include "core.h"
+#include <linux/of_platform.h>
+#include <linux/regulator/consumer.h>
 
 struct dwc3_exynos {
-	struct platform_device	*dwc3;
 	struct platform_device	*usb2_phy;
 	struct platform_device	*usb3_phy;
 	struct device		*dev;
 
 	struct clk		*clk;
+	struct regulator	*vdd33;
+	struct regulator	*vdd10;
 };
 
 static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
 {
-	struct nop_usb_xceiv_platform_data pdata;
+	struct usb_phy_generic_platform_data pdata;
 	struct platform_device	*pdev;
 	int			ret;
 
 	memset(&pdata, 0x00, sizeof(pdata));
 
-	pdev = platform_device_alloc("nop_usb_xceiv", 0);
+	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
 	if (!pdev)
 		return -ENOMEM;
 
 	exynos->usb2_phy = pdev;
 	pdata.type = USB_PHY_TYPE_USB2;
+	pdata.gpio_reset = -1;
 
 	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
 	if (ret)
 		goto err1;
 
-	pdev = platform_device_alloc("nop_usb_xceiv", 1);
+	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
 	if (!pdev) {
 		ret = -ENOMEM;
 		goto err1;
@@ -88,20 +94,28 @@ err1:
 	return ret;
 }
 
-static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
+static int dwc3_exynos_remove_child(struct device *dev, void *unused)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	platform_device_unregister(pdev);
+
+	return 0;
+}
 
 static int dwc3_exynos_probe(struct platform_device *pdev)
 {
-	struct platform_device	*dwc3;
 	struct dwc3_exynos	*exynos;
 	struct clk		*clk;
+	struct device		*dev = &pdev->dev;
+	struct device_node	*node = dev->of_node;
 
-	int			ret = -ENOMEM;
+	int			ret;
 
-	exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
+	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
 	if (!exynos) {
-		dev_err(&pdev->dev, "not enough memory\n");
-		goto err0;
+		dev_err(dev, "not enough memory\n");
+		return -ENOMEM;
 	}
 
 	/*
@@ -109,64 +123,71 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
 	 * Since shared usb code relies on it, set it here for now.
 	 * Once we move to full device tree support this will vanish off.
 	 */
-	if (!pdev->dev.dma_mask)
-		pdev->dev.dma_mask = &dwc3_exynos_dma_mask;
+	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
 
 	platform_set_drvdata(pdev, exynos);
 
 	ret = dwc3_exynos_register_phys(exynos);
 	if (ret) {
-		dev_err(&pdev->dev, "couldn't register PHYs\n");
-		goto err1;
-	}
-
-	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
-	if (!dwc3) {
-		dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
-		goto err1;
+		dev_err(dev, "couldn't register PHYs\n");
+		return ret;
 	}
 
-	clk = clk_get(&pdev->dev, "usbdrd30");
+	clk = devm_clk_get(dev, "usbdrd30");
 	if (IS_ERR(clk)) {
-		dev_err(&pdev->dev, "couldn't get clock\n");
-		ret = -EINVAL;
-		goto err3;
+		dev_err(dev, "couldn't get clock\n");
+		return -EINVAL;
 	}
 
-	dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
-
-	dwc3->dev.parent = &pdev->dev;
-	dwc3->dev.dma_mask = pdev->dev.dma_mask;
-	dwc3->dev.dma_parms = pdev->dev.dma_parms;
-	exynos->dwc3	= dwc3;
-	exynos->dev	= &pdev->dev;
+	exynos->dev	= dev;
 	exynos->clk	= clk;
 
-	clk_enable(exynos->clk);
+	clk_prepare_enable(exynos->clk);
 
-	ret = platform_device_add_resources(dwc3, pdev->resource,
-			pdev->num_resources);
+	exynos->vdd33 = devm_regulator_get(dev, "vdd33");
+	if (IS_ERR(exynos->vdd33)) {
+		ret = PTR_ERR(exynos->vdd33);
+		goto err2;
+	}
+	ret = regulator_enable(exynos->vdd33);
 	if (ret) {
-		dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
-		goto err4;
+		dev_err(dev, "Failed to enable VDD33 supply\n");
+		goto err2;
 	}
 
-	ret = platform_device_add(dwc3);
+	exynos->vdd10 = devm_regulator_get(dev, "vdd10");
+	if (IS_ERR(exynos->vdd10)) {
+		ret = PTR_ERR(exynos->vdd10);
+		goto err3;
+	}
+	ret = regulator_enable(exynos->vdd10);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to register dwc3 device\n");
+		dev_err(dev, "Failed to enable VDD10 supply\n");
+		goto err3;
+	}
+
+	if (node) {
+		ret = of_platform_populate(node, NULL, NULL, dev);
+		if (ret) {
+			dev_err(dev, "failed to add dwc3 core\n");
+			goto err4;
+		}
+	} else {
+		dev_err(dev, "no device node, failed to add dwc3 core\n");
+		ret = -ENODEV;
 		goto err4;
 	}
 
 	return 0;
 
 err4:
-	clk_disable(clk);
-	clk_put(clk);
+	regulator_disable(exynos->vdd10);
 err3:
-	platform_device_put(dwc3);
-err1:
-	kfree(exynos);
-err0:
+	regulator_disable(exynos->vdd33);
+err2:
+	clk_disable_unprepare(clk);
 	return ret;
 }
 
@@ -174,32 +195,81 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
 {
 	struct dwc3_exynos	*exynos = platform_get_drvdata(pdev);
 
-	platform_device_unregister(exynos->dwc3);
+	device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
 	platform_device_unregister(exynos->usb2_phy);
 	platform_device_unregister(exynos->usb3_phy);
 
-	clk_disable(exynos->clk);
-	clk_put(exynos->clk);
+	clk_disable_unprepare(exynos->clk);
 
-	kfree(exynos);
+	regulator_disable(exynos->vdd33);
+	regulator_disable(exynos->vdd10);
 
 	return 0;
 }
 
 #ifdef CONFIG_OF
 static const struct of_device_id exynos_dwc3_match[] = {
-	{ .compatible = "samsung,exynos-dwc3" },
+	{ .compatible = "samsung,exynos5250-dwusb3" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
 #endif
 
+#ifdef CONFIG_PM_SLEEP
+static int dwc3_exynos_suspend(struct device *dev)
+{
+	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
+
+	clk_disable(exynos->clk);
+
+	regulator_disable(exynos->vdd33);
+	regulator_disable(exynos->vdd10);
+
+	return 0;
+}
+
+static int dwc3_exynos_resume(struct device *dev)
+{
+	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
+	int ret;
+
+	ret = regulator_enable(exynos->vdd33);
+	if (ret) {
+		dev_err(dev, "Failed to enable VDD33 supply\n");
+		return ret;
+	}
+	ret = regulator_enable(exynos->vdd10);
+	if (ret) {
+		dev_err(dev, "Failed to enable VDD10 supply\n");
+		return ret;
+	}
+
+	clk_enable(exynos->clk);
+
+	/* runtime set active to reflect active state. */
+	pm_runtime_disable(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)
+};
+
+#define DEV_PM_OPS	(&dwc3_exynos_dev_pm_ops)
+#else
+#define DEV_PM_OPS	NULL
+#endif /* CONFIG_PM_SLEEP */
+
 static struct platform_driver dwc3_exynos_driver = {
 	.probe		= dwc3_exynos_probe,
 	.remove		= dwc3_exynos_remove,
 	.driver		= {
 		.name	= "exynos-dwc3",
 		.of_match_table = of_match_ptr(exynos_dwc3_match),
+		.pm	= DEV_PM_OPS,
 	},
 };
 
@@ -207,5 +277,5 @@ module_platform_driver(dwc3_exynos_driver);
 
 MODULE_ALIAS("platform:exynos-dwc3");
 MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");