Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 292 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
new file mode 100644
index 000000000..a94fb1ba8
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/usb_phy_generic.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/regulator/consumer.h>
+
+struct dwc3_exynos {
+	struct platform_device	*usb2_phy;
+	struct platform_device	*usb3_phy;
+	struct device		*dev;
+
+	struct clk		*clk;
+	struct clk		*susp_clk;
+	struct clk		*axius_clk;
+
+	struct regulator	*vdd33;
+	struct regulator	*vdd10;
+};
+
+static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
+{
+	struct usb_phy_generic_platform_data pdata;
+	struct platform_device	*pdev;
+	int			ret;
+
+	memset(&pdata, 0x00, sizeof(pdata));
+
+	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("usb_phy_generic", PLATFORM_DEVID_AUTO);
+	if (!pdev) {
+		ret = -ENOMEM;
+		goto err1;
+	}
+
+	exynos->usb3_phy = pdev;
+	pdata.type = USB_PHY_TYPE_USB3;
+
+	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
+	if (ret)
+		goto err2;
+
+	ret = platform_device_add(exynos->usb2_phy);
+	if (ret)
+		goto err2;
+
+	ret = platform_device_add(exynos->usb3_phy);
+	if (ret)
+		goto err3;
+
+	return 0;
+
+err3:
+	platform_device_del(exynos->usb2_phy);
+
+err2:
+	platform_device_put(exynos->usb3_phy);
+
+err1:
+	platform_device_put(exynos->usb2_phy);
+
+	return ret;
+}
+
+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 dwc3_exynos	*exynos;
+	struct device		*dev = &pdev->dev;
+	struct device_node	*node = dev->of_node;
+
+	int			ret;
+
+	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
+	if (!exynos)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, exynos);
+
+	exynos->dev	= dev;
+
+	exynos->clk = devm_clk_get(dev, "usbdrd30");
+	if (IS_ERR(exynos->clk)) {
+		dev_err(dev, "couldn't get clock\n");
+		return -EINVAL;
+	}
+	ret = clk_prepare_enable(exynos->clk);
+	if (ret)
+		return ret;
+
+	exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
+	if (IS_ERR(exynos->susp_clk))
+		exynos->susp_clk = NULL;
+	ret = clk_prepare_enable(exynos->susp_clk);
+	if (ret)
+		goto susp_clk_err;
+
+	if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
+		exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
+		if (IS_ERR(exynos->axius_clk)) {
+			dev_err(dev, "no AXI UpScaler clk specified\n");
+			ret = -ENODEV;
+			goto axius_clk_err;
+		}
+		ret = clk_prepare_enable(exynos->axius_clk);
+		if (ret)
+			goto axius_clk_err;
+	} else {
+		exynos->axius_clk = NULL;
+	}
+
+	exynos->vdd33 = devm_regulator_get(dev, "vdd33");
+	if (IS_ERR(exynos->vdd33)) {
+		ret = PTR_ERR(exynos->vdd33);
+		goto vdd33_err;
+	}
+	ret = regulator_enable(exynos->vdd33);
+	if (ret) {
+		dev_err(dev, "Failed to enable VDD33 supply\n");
+		goto vdd33_err;
+	}
+
+	exynos->vdd10 = devm_regulator_get(dev, "vdd10");
+	if (IS_ERR(exynos->vdd10)) {
+		ret = PTR_ERR(exynos->vdd10);
+		goto vdd10_err;
+	}
+	ret = regulator_enable(exynos->vdd10);
+	if (ret) {
+		dev_err(dev, "Failed to enable VDD10 supply\n");
+		goto vdd10_err;
+	}
+
+	ret = dwc3_exynos_register_phys(exynos);
+	if (ret) {
+		dev_err(dev, "couldn't register PHYs\n");
+		goto phys_err;
+	}
+
+	if (node) {
+		ret = of_platform_populate(node, NULL, NULL, dev);
+		if (ret) {
+			dev_err(dev, "failed to add dwc3 core\n");
+			goto populate_err;
+		}
+	} else {
+		dev_err(dev, "no device node, failed to add dwc3 core\n");
+		ret = -ENODEV;
+		goto populate_err;
+	}
+
+	return 0;
+
+populate_err:
+	platform_device_unregister(exynos->usb2_phy);
+	platform_device_unregister(exynos->usb3_phy);
+phys_err:
+	regulator_disable(exynos->vdd10);
+vdd10_err:
+	regulator_disable(exynos->vdd33);
+vdd33_err:
+	clk_disable_unprepare(exynos->axius_clk);
+axius_clk_err:
+	clk_disable_unprepare(exynos->susp_clk);
+susp_clk_err:
+	clk_disable_unprepare(exynos->clk);
+	return ret;
+}
+
+static int dwc3_exynos_remove(struct platform_device *pdev)
+{
+	struct dwc3_exynos	*exynos = platform_get_drvdata(pdev);
+
+	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_unprepare(exynos->axius_clk);
+	clk_disable_unprepare(exynos->susp_clk);
+	clk_disable_unprepare(exynos->clk);
+
+	regulator_disable(exynos->vdd33);
+	regulator_disable(exynos->vdd10);
+
+	return 0;
+}
+
+static const struct of_device_id exynos_dwc3_match[] = {
+	{ .compatible = "samsung,exynos5250-dwusb3" },
+	{ .compatible = "samsung,exynos7-dwusb3" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int dwc3_exynos_suspend(struct device *dev)
+{
+	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
+
+	clk_disable(exynos->axius_clk);
+	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);
+	clk_enable(exynos->axius_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 = exynos_dwc3_match,
+		.pm	= DEV_PM_OPS,
+	},
+};
+
+module_platform_driver(dwc3_exynos_driver);
+
+MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");