Resguardo inicial

linux-7.2.3/drivers/phy/renesas/Kconfig

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Phy drivers for Renesas platforms
+#
+# NOTE: Please sorted config names alphabetically.
+config PHY_R8A779F0_ETHERNET_SERDES
+	tristate "Renesas R-Car S4-8 Ethernet SERDES driver"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Support for Ethernet SERDES found on Renesas R-Car S4-8 SoCs.
+
+config PHY_RCAR_GEN2
+	tristate "Renesas R-Car generation 2 USB PHY driver"
+	depends on ARCH_RENESAS
+	select GENERIC_PHY
+	help
+	  Support for USB PHY found on Renesas R-Car generation 2 SoCs.
+
+config PHY_RCAR_GEN3_PCIE
+	tristate "Renesas R-Car generation 3 PCIe PHY driver"
+	depends on ARCH_RENESAS
+	select GENERIC_PHY
+	help
+	  Support for the PCIe PHY found on Renesas R-Car generation 3 SoCs.
+
+config PHY_RCAR_GEN3_USB2
+	tristate "Renesas R-Car generation 3 USB 2.0 PHY driver"
+	depends on ARCH_RENESAS
+	depends on EXTCON || !EXTCON # if EXTCON=m, this cannot be built-in
+	depends on USB_SUPPORT
+	depends on REGULATOR
+	select GENERIC_PHY
+	select MULTIPLEXER
+	select USB_COMMON
+	help
+	  Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs.
+
+config PHY_RCAR_GEN3_USB3
+	tristate "Renesas R-Car generation 3 USB 3.0 PHY driver"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Support for USB 3.0 PHY found on Renesas R-Car generation 3 SoCs.
+
+config PHY_RZ_G3E_USB3
+	tristate "Renesas RZ/G3E USB 3.0 PHY driver"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Support for USB 3.0 PHY found on Renesas RZ/G3E SoCs.

linux-7.2.3/drivers/phy/renesas/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_R8A779F0_ETHERNET_SERDES)	+= r8a779f0-ether-serdes.o
+obj-$(CONFIG_PHY_RCAR_GEN2)		+= phy-rcar-gen2.o
+obj-$(CONFIG_PHY_RCAR_GEN3_PCIE)	+= phy-rcar-gen3-pcie.o
+obj-$(CONFIG_PHY_RCAR_GEN3_USB2)	+= phy-rcar-gen3-usb2.o
+obj-$(CONFIG_PHY_RCAR_GEN3_USB3)	+= phy-rcar-gen3-usb3.o
+obj-$(CONFIG_PHY_RZ_G3E_USB3)		+= phy-rzg3e-usb3.o

linux-7.2.3/drivers/phy/renesas/phy-rcar-gen2.c

@@ -0,0 +1,440 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas R-Car Gen2 PHY driver
+ *
+ * Copyright (C) 2014 Renesas Solutions Corp.
+ * Copyright (C) 2014 Cogent Embedded, Inc.
+ * Copyright (C) 2019 Renesas Electronics Corp.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/atomic.h>
+
+#define USBHS_LPSTS			0x02
+#define USBHS_UGCTRL			0x80
+#define USBHS_UGCTRL2			0x84
+#define USBHS_UGSTS			0x88	/* From technical update */
+
+/* Low Power Status register (LPSTS) */
+#define USBHS_LPSTS_SUSPM		0x4000
+
+/* USB General control register (UGCTRL) */
+#define USBHS_UGCTRL_CONNECT		0x00000004
+#define USBHS_UGCTRL_PLLRESET		0x00000001
+
+/* USB General control register 2 (UGCTRL2) */
+#define USBHS_UGCTRL2_USB2SEL		0x80000000
+#define USBHS_UGCTRL2_USB2SEL_PCI	0x00000000
+#define USBHS_UGCTRL2_USB2SEL_USB30	0x80000000
+#define USBHS_UGCTRL2_USB0SEL		0x00000030
+#define USBHS_UGCTRL2_USB0SEL_PCI	0x00000010
+#define USBHS_UGCTRL2_USB0SEL_HS_USB	0x00000030
+#define USBHS_UGCTRL2_USB0SEL_USB20	0x00000010
+#define USBHS_UGCTRL2_USB0SEL_HS_USB20	0x00000020
+
+/* USB General status register (UGSTS) */
+#define USBHS_UGSTS_LOCK		0x00000100 /* From technical update */
+
+#define PHYS_PER_CHANNEL	2
+
+struct rcar_gen2_phy {
+	struct phy *phy;
+	struct rcar_gen2_channel *channel;
+	int number;
+	u32 select_value;
+};
+
+struct rcar_gen2_channel {
+	struct device_node *of_node;
+	struct rcar_gen2_phy_driver *drv;
+	struct rcar_gen2_phy phys[PHYS_PER_CHANNEL];
+	int selected_phy;
+	u32 select_mask;
+};
+
+struct rcar_gen2_phy_driver {
+	void __iomem *base;
+	struct clk *clk;
+	spinlock_t lock;
+	int num_channels;
+	struct rcar_gen2_channel *channels;
+};
+
+struct rcar_gen2_phy_data {
+	const struct phy_ops *gen2_phy_ops;
+	const u32 (*select_value)[PHYS_PER_CHANNEL];
+	const u32 num_channels;
+};
+
+static int rcar_gen2_phy_init(struct phy *p)
+{
+	struct rcar_gen2_phy *phy = phy_get_drvdata(p);
+	struct rcar_gen2_channel *channel = phy->channel;
+	struct rcar_gen2_phy_driver *drv = channel->drv;
+	unsigned long flags;
+	u32 ugctrl2;
+
+	/*
+	 * Try to acquire exclusive access to PHY.  The first driver calling
+	 * phy_init()  on a given channel wins, and all attempts  to use another
+	 * PHY on this channel will fail until phy_exit() is called by the first
+	 * driver.   Achieving this with cmpxchg() should be SMP-safe.
+	 */
+	if (cmpxchg(&channel->selected_phy, -1, phy->number) != -1)
+		return -EBUSY;
+
+	clk_prepare_enable(drv->clk);
+
+	spin_lock_irqsave(&drv->lock, flags);
+	ugctrl2 = readl(drv->base + USBHS_UGCTRL2);
+	ugctrl2 &= ~channel->select_mask;
+	ugctrl2 |= phy->select_value;
+	writel(ugctrl2, drv->base + USBHS_UGCTRL2);
+	spin_unlock_irqrestore(&drv->lock, flags);
+	return 0;
+}
+
+static int rcar_gen2_phy_exit(struct phy *p)
+{
+	struct rcar_gen2_phy *phy = phy_get_drvdata(p);
+	struct rcar_gen2_channel *channel = phy->channel;
+
+	clk_disable_unprepare(channel->drv->clk);
+
+	channel->selected_phy = -1;
+
+	return 0;
+}
+
+static int rcar_gen2_phy_power_on(struct phy *p)
+{
+	struct rcar_gen2_phy *phy = phy_get_drvdata(p);
+	struct rcar_gen2_phy_driver *drv = phy->channel->drv;
+	void __iomem *base = drv->base;
+	unsigned long flags;
+	u32 value;
+	int err = 0, i;
+
+	/* Skip if it's not USBHS */
+	if (phy->select_value != USBHS_UGCTRL2_USB0SEL_HS_USB)
+		return 0;
+
+	spin_lock_irqsave(&drv->lock, flags);
+
+	/* Power on USBHS PHY */
+	value = readl(base + USBHS_UGCTRL);
+	value &= ~USBHS_UGCTRL_PLLRESET;
+	writel(value, base + USBHS_UGCTRL);
+
+	value = readw(base + USBHS_LPSTS);
+	value |= USBHS_LPSTS_SUSPM;
+	writew(value, base + USBHS_LPSTS);
+
+	for (i = 0; i < 20; i++) {
+		value = readl(base + USBHS_UGSTS);
+		if ((value & USBHS_UGSTS_LOCK) == USBHS_UGSTS_LOCK) {
+			value = readl(base + USBHS_UGCTRL);
+			value |= USBHS_UGCTRL_CONNECT;
+			writel(value, base + USBHS_UGCTRL);
+			goto out;
+		}
+		udelay(1);
+	}
+
+	/* Timed out waiting for the PLL lock */
+	err = -ETIMEDOUT;
+
+out:
+	spin_unlock_irqrestore(&drv->lock, flags);
+
+	return err;
+}
+
+static int rcar_gen2_phy_power_off(struct phy *p)
+{
+	struct rcar_gen2_phy *phy = phy_get_drvdata(p);
+	struct rcar_gen2_phy_driver *drv = phy->channel->drv;
+	void __iomem *base = drv->base;
+	unsigned long flags;
+	u32 value;
+
+	/* Skip if it's not USBHS */
+	if (phy->select_value != USBHS_UGCTRL2_USB0SEL_HS_USB)
+		return 0;
+
+	spin_lock_irqsave(&drv->lock, flags);
+
+	/* Power off USBHS PHY */
+	value = readl(base + USBHS_UGCTRL);
+	value &= ~USBHS_UGCTRL_CONNECT;
+	writel(value, base + USBHS_UGCTRL);
+
+	value = readw(base + USBHS_LPSTS);
+	value &= ~USBHS_LPSTS_SUSPM;
+	writew(value, base + USBHS_LPSTS);
+
+	value = readl(base + USBHS_UGCTRL);
+	value |= USBHS_UGCTRL_PLLRESET;
+	writel(value, base + USBHS_UGCTRL);
+
+	spin_unlock_irqrestore(&drv->lock, flags);
+
+	return 0;
+}
+
+static int rz_g1c_phy_power_on(struct phy *p)
+{
+	struct rcar_gen2_phy *phy = phy_get_drvdata(p);
+	struct rcar_gen2_phy_driver *drv = phy->channel->drv;
+	void __iomem *base = drv->base;
+	unsigned long flags;
+	u32 value;
+
+	spin_lock_irqsave(&drv->lock, flags);
+
+	/* Power on USBHS PHY */
+	value = readl(base + USBHS_UGCTRL);
+	value &= ~USBHS_UGCTRL_PLLRESET;
+	writel(value, base + USBHS_UGCTRL);
+
+	/* As per the data sheet wait 340 micro sec for power stable */
+	udelay(340);
+
+	if (phy->select_value == USBHS_UGCTRL2_USB0SEL_HS_USB20) {
+		value = readw(base + USBHS_LPSTS);
+		value |= USBHS_LPSTS_SUSPM;
+		writew(value, base + USBHS_LPSTS);
+	}
+
+	spin_unlock_irqrestore(&drv->lock, flags);
+
+	return 0;
+}
+
+static int rz_g1c_phy_power_off(struct phy *p)
+{
+	struct rcar_gen2_phy *phy = phy_get_drvdata(p);
+	struct rcar_gen2_phy_driver *drv = phy->channel->drv;
+	void __iomem *base = drv->base;
+	unsigned long flags;
+	u32 value;
+
+	spin_lock_irqsave(&drv->lock, flags);
+	/* Power off USBHS PHY */
+	if (phy->select_value == USBHS_UGCTRL2_USB0SEL_HS_USB20) {
+		value = readw(base + USBHS_LPSTS);
+		value &= ~USBHS_LPSTS_SUSPM;
+		writew(value, base + USBHS_LPSTS);
+	}
+
+	value = readl(base + USBHS_UGCTRL);
+	value |= USBHS_UGCTRL_PLLRESET;
+	writel(value, base + USBHS_UGCTRL);
+
+	spin_unlock_irqrestore(&drv->lock, flags);
+
+	return 0;
+}
+
+static const struct phy_ops rcar_gen2_phy_ops = {
+	.init		= rcar_gen2_phy_init,
+	.exit		= rcar_gen2_phy_exit,
+	.power_on	= rcar_gen2_phy_power_on,
+	.power_off	= rcar_gen2_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static const struct phy_ops rz_g1c_phy_ops = {
+	.init		= rcar_gen2_phy_init,
+	.exit		= rcar_gen2_phy_exit,
+	.power_on	= rz_g1c_phy_power_on,
+	.power_off	= rz_g1c_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static const u32 pci_select_value[][PHYS_PER_CHANNEL] = {
+	[0]	= { USBHS_UGCTRL2_USB0SEL_PCI, USBHS_UGCTRL2_USB0SEL_HS_USB },
+	[2]	= { USBHS_UGCTRL2_USB2SEL_PCI, USBHS_UGCTRL2_USB2SEL_USB30 },
+};
+
+static const u32 usb20_select_value[][PHYS_PER_CHANNEL] = {
+	{ USBHS_UGCTRL2_USB0SEL_USB20, USBHS_UGCTRL2_USB0SEL_HS_USB20 },
+};
+
+static const struct rcar_gen2_phy_data rcar_gen2_usb_phy_data = {
+	.gen2_phy_ops = &rcar_gen2_phy_ops,
+	.select_value = pci_select_value,
+	.num_channels = ARRAY_SIZE(pci_select_value),
+};
+
+static const struct rcar_gen2_phy_data rz_g1c_usb_phy_data = {
+	.gen2_phy_ops = &rz_g1c_phy_ops,
+	.select_value = usb20_select_value,
+	.num_channels = ARRAY_SIZE(usb20_select_value),
+};
+
+static const struct of_device_id rcar_gen2_phy_match_table[] = {
+	{
+		.compatible = "renesas,usb-phy-r8a77470",
+		.data = &rz_g1c_usb_phy_data,
+	},
+	{
+		.compatible = "renesas,usb-phy-r8a7790",
+		.data = &rcar_gen2_usb_phy_data,
+	},
+	{
+		.compatible = "renesas,usb-phy-r8a7791",
+		.data = &rcar_gen2_usb_phy_data,
+	},
+	{
+		.compatible = "renesas,usb-phy-r8a7794",
+		.data = &rcar_gen2_usb_phy_data,
+	},
+	{
+		.compatible = "renesas,rcar-gen2-usb-phy",
+		.data = &rcar_gen2_usb_phy_data,
+	},
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, rcar_gen2_phy_match_table);
+
+static struct phy *rcar_gen2_phy_xlate(struct device *dev,
+				       const struct of_phandle_args *args)
+{
+	struct rcar_gen2_phy_driver *drv;
+	struct device_node *np = args->np;
+	int i;
+
+	drv = dev_get_drvdata(dev);
+	if (!drv)
+		return ERR_PTR(-EINVAL);
+
+	for (i = 0; i < drv->num_channels; i++) {
+		if (np == drv->channels[i].of_node)
+			break;
+	}
+
+	if (i >= drv->num_channels || args->args[0] >= 2)
+		return ERR_PTR(-ENODEV);
+
+	return drv->channels[i].phys[args->args[0]].phy;
+}
+
+static const u32 select_mask[] = {
+	[0]	= USBHS_UGCTRL2_USB0SEL,
+	[2]	= USBHS_UGCTRL2_USB2SEL,
+};
+
+static int rcar_gen2_phy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rcar_gen2_phy_driver *drv;
+	struct phy_provider *provider;
+	void __iomem *base;
+	struct clk *clk;
+	const struct rcar_gen2_phy_data *data;
+	int i = 0;
+
+	if (!dev->of_node) {
+		dev_err(dev,
+			"This driver is required to be instantiated from device tree\n");
+		return -EINVAL;
+	}
+
+	clk = devm_clk_get(dev, "usbhs");
+	if (IS_ERR(clk)) {
+		dev_err(dev, "Can't get USBHS clock\n");
+		return PTR_ERR(clk);
+	}
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
+	if (!drv)
+		return -ENOMEM;
+
+	spin_lock_init(&drv->lock);
+
+	drv->clk = clk;
+	drv->base = base;
+
+	data = of_device_get_match_data(dev);
+	if (!data)
+		return -EINVAL;
+
+	drv->num_channels = of_get_child_count(dev->of_node);
+	drv->channels = devm_kcalloc(dev, drv->num_channels,
+				     sizeof(struct rcar_gen2_channel),
+				     GFP_KERNEL);
+	if (!drv->channels)
+		return -ENOMEM;
+
+	for_each_child_of_node_scoped(dev->of_node, np) {
+		struct rcar_gen2_channel *channel = drv->channels + i;
+		u32 channel_num;
+		int error, n;
+
+		channel->of_node = np;
+		channel->drv = drv;
+		channel->selected_phy = -1;
+
+		error = of_property_read_u32(np, "reg", &channel_num);
+		if (error || channel_num >= data->num_channels) {
+			dev_err(dev, "Invalid \"reg\" property\n");
+			return error;
+		}
+		channel->select_mask = select_mask[channel_num];
+
+		for (n = 0; n < PHYS_PER_CHANNEL; n++) {
+			struct rcar_gen2_phy *phy = &channel->phys[n];
+
+			phy->channel = channel;
+			phy->number = n;
+			phy->select_value = data->select_value[channel_num][n];
+
+			phy->phy = devm_phy_create(dev, NULL,
+						   data->gen2_phy_ops);
+			if (IS_ERR(phy->phy)) {
+				dev_err(dev, "Failed to create PHY\n");
+				of_node_put(np);
+				return PTR_ERR(phy->phy);
+			}
+			phy_set_drvdata(phy->phy, phy);
+		}
+
+		i++;
+	}
+
+	provider = devm_of_phy_provider_register(dev, rcar_gen2_phy_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(dev, "Failed to register PHY provider\n");
+		return PTR_ERR(provider);
+	}
+
+	dev_set_drvdata(dev, drv);
+
+	return 0;
+}
+
+static struct platform_driver rcar_gen2_phy_driver = {
+	.driver = {
+		.name		= "phy_rcar_gen2",
+		.of_match_table	= rcar_gen2_phy_match_table,
+	},
+	.probe	= rcar_gen2_phy_probe,
+};
+
+module_platform_driver(rcar_gen2_phy_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Renesas R-Car Gen2 PHY");
+MODULE_AUTHOR("Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>");

linux-7.2.3/drivers/phy/renesas/phy-rcar-gen3-pcie.c

@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas R-Car Gen3 PCIe PHY driver
+ *
+ * Copyright (C) 2018 Cogent Embedded, Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#define PHY_CTRL		0x4000		/* R8A77980 only */
+
+/* PHY control register (PHY_CTRL) */
+#define PHY_CTRL_PHY_PWDN	BIT(2)
+
+struct rcar_gen3_phy {
+	struct phy *phy;
+	spinlock_t lock;
+	void __iomem *base;
+};
+
+static void rcar_gen3_phy_pcie_modify_reg(struct phy *p, unsigned int reg,
+					  u32 clear, u32 set)
+{
+	struct rcar_gen3_phy *phy = phy_get_drvdata(p);
+	void __iomem *base = phy->base;
+	unsigned long flags;
+	u32 value;
+
+	spin_lock_irqsave(&phy->lock, flags);
+
+	value = readl(base + reg);
+	value &= ~clear;
+	value |= set;
+	writel(value, base + reg);
+
+	spin_unlock_irqrestore(&phy->lock, flags);
+}
+
+static int r8a77980_phy_pcie_power_on(struct phy *p)
+{
+	/* Power on the PCIe PHY */
+	rcar_gen3_phy_pcie_modify_reg(p, PHY_CTRL, PHY_CTRL_PHY_PWDN, 0);
+
+	return 0;
+}
+
+static int r8a77980_phy_pcie_power_off(struct phy *p)
+{
+	/* Power off the PCIe PHY */
+	rcar_gen3_phy_pcie_modify_reg(p, PHY_CTRL, 0, PHY_CTRL_PHY_PWDN);
+
+	return 0;
+}
+
+static const struct phy_ops r8a77980_phy_pcie_ops = {
+	.power_on	= r8a77980_phy_pcie_power_on,
+	.power_off	= r8a77980_phy_pcie_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static const struct of_device_id rcar_gen3_phy_pcie_match_table[] = {
+	{ .compatible = "renesas,r8a77980-pcie-phy" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, rcar_gen3_phy_pcie_match_table);
+
+static int rcar_gen3_phy_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct phy_provider *provider;
+	struct rcar_gen3_phy *phy;
+	void __iomem *base;
+	int error;
+
+	if (!dev->of_node) {
+		dev_err(dev,
+			"This driver must only be instantiated from the device tree\n");
+		return -EINVAL;
+	}
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	spin_lock_init(&phy->lock);
+
+	phy->base = base;
+
+	/*
+	 * devm_phy_create() will call pm_runtime_enable(&phy->dev);
+	 * And then, phy-core will manage runtime PM for this device.
+	 */
+	pm_runtime_enable(dev);
+
+	phy->phy = devm_phy_create(dev, NULL, &r8a77980_phy_pcie_ops);
+	if (IS_ERR(phy->phy)) {
+		dev_err(dev, "Failed to create PCIe PHY\n");
+		error = PTR_ERR(phy->phy);
+		goto error;
+	}
+	phy_set_drvdata(phy->phy, phy);
+
+	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(dev, "Failed to register PHY provider\n");
+		error = PTR_ERR(provider);
+		goto error;
+	}
+
+	return 0;
+
+error:
+	pm_runtime_disable(dev);
+
+	return error;
+}
+
+static void rcar_gen3_phy_pcie_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+}
+
+static struct platform_driver rcar_gen3_phy_driver = {
+	.driver = {
+		.name = "phy_rcar_gen3_pcie",
+		.of_match_table = rcar_gen3_phy_pcie_match_table,
+	},
+	.probe = rcar_gen3_phy_pcie_probe,
+	.remove = rcar_gen3_phy_pcie_remove,
+};
+
+module_platform_driver(rcar_gen3_phy_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Renesas R-Car Gen3 PCIe PHY");
+MODULE_AUTHOR("Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>");

linux-7.2.3/drivers/phy/renesas/phy-rcar-gen3-usb3.c

@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas R-Car Gen3 for USB3.0 PHY driver
+ *
+ * Copyright (C) 2017 Renesas Electronics Corporation
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#define USB30_CLKSET0		0x034
+#define USB30_CLKSET1		0x036
+#define USB30_SSC_SET		0x038
+#define USB30_PHY_ENABLE	0x060
+#define USB30_VBUS_EN		0x064
+
+/* USB30_CLKSET0 */
+#define CLKSET0_PRIVATE			0x05c0
+#define CLKSET0_USB30_FSEL_USB_EXTAL	0x0002
+
+/* USB30_CLKSET1 */
+#define CLKSET1_USB30_PLL_MULTI_SHIFT		6
+#define CLKSET1_USB30_PLL_MULTI_USB_EXTAL	(0x64 << \
+						 CLKSET1_USB30_PLL_MULTI_SHIFT)
+#define CLKSET1_PHYRESET	BIT(4)	/* 1: reset */
+#define CLKSET1_REF_CLKDIV	BIT(3)	/* 1: USB_EXTAL */
+#define CLKSET1_PRIVATE_2_1	BIT(1)	/* Write B'01 */
+#define CLKSET1_REF_CLK_SEL	BIT(0)	/* 1: USB3S0_CLK_P */
+
+/* USB30_SSC_SET */
+#define SSC_SET_SSC_EN		BIT(12)
+#define SSC_SET_RANGE_SHIFT	9
+#define SSC_SET_RANGE_4980	(0x0 << SSC_SET_RANGE_SHIFT)
+#define SSC_SET_RANGE_4492	(0x1 << SSC_SET_RANGE_SHIFT)
+#define SSC_SET_RANGE_4003	(0x2 << SSC_SET_RANGE_SHIFT)
+
+/* USB30_PHY_ENABLE */
+#define PHY_ENABLE_RESET_EN	BIT(4)
+
+/* USB30_VBUS_EN */
+#define VBUS_EN_VBUS_EN		BIT(1)
+
+struct rcar_gen3_usb3 {
+	void __iomem *base;
+	struct phy *phy;
+	u32 ssc_range;
+	bool usb3s_clk;
+	bool usb_extal;
+};
+
+static void write_clkset1_for_usb_extal(struct rcar_gen3_usb3 *r, bool reset)
+{
+	u16 val = CLKSET1_USB30_PLL_MULTI_USB_EXTAL |
+		  CLKSET1_REF_CLKDIV | CLKSET1_PRIVATE_2_1;
+
+	if (reset)
+		val |= CLKSET1_PHYRESET;
+
+	writew(val, r->base + USB30_CLKSET1);
+}
+
+static void rcar_gen3_phy_usb3_enable_ssc(struct rcar_gen3_usb3 *r)
+{
+	u16 val = SSC_SET_SSC_EN;
+
+	switch (r->ssc_range) {
+	case 4980:
+		val |= SSC_SET_RANGE_4980;
+		break;
+	case 4492:
+		val |= SSC_SET_RANGE_4492;
+		break;
+	case 4003:
+		val |= SSC_SET_RANGE_4003;
+		break;
+	default:
+		dev_err(&r->phy->dev, "%s: unsupported range (%x)\n", __func__,
+			r->ssc_range);
+		return;
+	}
+
+	writew(val, r->base + USB30_SSC_SET);
+}
+
+static void rcar_gen3_phy_usb3_select_usb_extal(struct rcar_gen3_usb3 *r)
+{
+	write_clkset1_for_usb_extal(r, false);
+	if (r->ssc_range)
+		rcar_gen3_phy_usb3_enable_ssc(r);
+	writew(CLKSET0_PRIVATE | CLKSET0_USB30_FSEL_USB_EXTAL,
+	       r->base + USB30_CLKSET0);
+	writew(PHY_ENABLE_RESET_EN, r->base + USB30_PHY_ENABLE);
+	write_clkset1_for_usb_extal(r, true);
+	usleep_range(10, 20);
+	write_clkset1_for_usb_extal(r, false);
+}
+
+static int rcar_gen3_phy_usb3_init(struct phy *p)
+{
+	struct rcar_gen3_usb3 *r = phy_get_drvdata(p);
+
+	dev_vdbg(&r->phy->dev, "%s: enter (%d, %d, %d)\n", __func__,
+		 r->usb3s_clk, r->usb_extal, r->ssc_range);
+
+	if (!r->usb3s_clk && r->usb_extal)
+		rcar_gen3_phy_usb3_select_usb_extal(r);
+
+	/* Enables VBUS detection anyway */
+	writew(VBUS_EN_VBUS_EN, r->base + USB30_VBUS_EN);
+
+	return 0;
+}
+
+static const struct phy_ops rcar_gen3_phy_usb3_ops = {
+	.init		= rcar_gen3_phy_usb3_init,
+	.owner		= THIS_MODULE,
+};
+
+static const struct of_device_id rcar_gen3_phy_usb3_match_table[] = {
+	{ .compatible = "renesas,rcar-gen3-usb3-phy" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb3_match_table);
+
+static int rcar_gen3_phy_usb3_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rcar_gen3_usb3 *r;
+	struct phy_provider *provider;
+	int ret = 0;
+	struct clk *clk;
+
+	if (!dev->of_node) {
+		dev_err(dev, "This driver needs device tree\n");
+		return -EINVAL;
+	}
+
+	r = devm_kzalloc(dev, sizeof(*r), GFP_KERNEL);
+	if (!r)
+		return -ENOMEM;
+
+	r->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(r->base))
+		return PTR_ERR(r->base);
+
+	clk = devm_clk_get(dev, "usb3s_clk");
+	if (!IS_ERR(clk) && !clk_prepare_enable(clk)) {
+		r->usb3s_clk = !!clk_get_rate(clk);
+		clk_disable_unprepare(clk);
+	}
+	clk = devm_clk_get(dev, "usb_extal");
+	if (!IS_ERR(clk) && !clk_prepare_enable(clk)) {
+		r->usb_extal = !!clk_get_rate(clk);
+		clk_disable_unprepare(clk);
+	}
+
+	if (!r->usb3s_clk && !r->usb_extal) {
+		dev_err(dev, "This driver needs usb3s_clk and/or usb_extal\n");
+		ret = -EINVAL;
+		goto error;
+	}
+
+	/*
+	 * devm_phy_create() will call pm_runtime_enable(&phy->dev);
+	 * And then, phy-core will manage runtime pm for this device.
+	 */
+	pm_runtime_enable(dev);
+
+	r->phy = devm_phy_create(dev, NULL, &rcar_gen3_phy_usb3_ops);
+	if (IS_ERR(r->phy)) {
+		dev_err(dev, "Failed to create USB3 PHY\n");
+		ret = PTR_ERR(r->phy);
+		goto error;
+	}
+
+	of_property_read_u32(dev->of_node, "renesas,ssc-range", &r->ssc_range);
+
+	platform_set_drvdata(pdev, r);
+	phy_set_drvdata(r->phy, r);
+
+	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(dev, "Failed to register PHY provider\n");
+		ret = PTR_ERR(provider);
+		goto error;
+	}
+
+	return 0;
+
+error:
+	pm_runtime_disable(dev);
+
+	return ret;
+}
+
+static void rcar_gen3_phy_usb3_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+}
+
+static struct platform_driver rcar_gen3_phy_usb3_driver = {
+	.driver = {
+		.name = "phy_rcar_gen3_usb3",
+		.of_match_table = rcar_gen3_phy_usb3_match_table,
+	},
+	.probe = rcar_gen3_phy_usb3_probe,
+	.remove = rcar_gen3_phy_usb3_remove,
+};
+module_platform_driver(rcar_gen3_phy_usb3_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Renesas R-Car Gen3 USB 3.0 PHY");
+MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");

linux-7.2.3/drivers/phy/renesas/phy-rzg3e-usb3.c

@@ -0,0 +1,257 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G3E USB3.0 PHY driver
+ *
+ * Copyright (C) 2025 Renesas Electronics Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#define USB3_TEST_RESET				0x0000
+#define USB3_TEST_UTMICTRL2			0x0b04
+#define USB3_TEST_PRMCTRL5_R			0x0c10
+#define USB3_TEST_PRMCTRL6_R			0x0c14
+
+#define USB3_TEST_RSTCTRL			0x1000
+#define USB3_TEST_CLKCTRL			0x1004
+#define USB3_TEST_RAMCTRL			0x100c
+#define USB3_TEST_CREGCTRL			0x1010
+#define USB3_TEST_LANECONFIG0			0x1030
+
+#define USB3_TEST_RESET_PORTRESET0_CTRL		BIT(9)
+#define USB3_TEST_RESET_SIDDQ			BIT(3)
+#define USB3_TEST_RESET_PHY_RESET		BIT(2)
+#define USB3_TEST_RESET_PORTRESET0		BIT(1)
+#define USB3_TEST_RESET_RELEASE_OVERRIDE	(0)
+
+#define USB3_TEST_UTMICTRL2_CTRL_MASK		GENMASK(9, 8)
+#define USB3_TEST_UTMICTRL2_MODE_MASK		GENMASK(1, 0)
+
+#define USB3_TEST_PRMCTRL5_R_TXPREEMPAMPTUNE0_MASK	GENMASK(2, 1)
+
+#define USB3_TEST_PRMCTRL6_R_OTGTUNE0_MASK	GENMASK(2, 0)
+
+#define USB3_TEST_RSTCTRL_HARDRESET_ODEN	BIT(9)
+#define USB3_TEST_RSTCTRL_PIPERESET_ODEN	BIT(8)
+#define USB3_TEST_RSTCTRL_HARDRESET		BIT(1)
+#define USB3_TEST_RSTCTRL_PIPERESET		BIT(0)
+#define USB3_TEST_RSTCTRL_ASSERT	\
+	(USB3_TEST_RSTCTRL_HARDRESET_ODEN | USB3_TEST_RSTCTRL_PIPERESET_ODEN | \
+	 USB3_TEST_RSTCTRL_HARDRESET | USB3_TEST_RSTCTRL_PIPERESET)
+#define USB3_TEST_RSTCTRL_RELEASE_HARDRESET	\
+	(USB3_TEST_RSTCTRL_HARDRESET_ODEN | USB3_TEST_RSTCTRL_PIPERESET_ODEN | \
+	 USB3_TEST_RSTCTRL_PIPERESET)
+#define USB3_TEST_RSTCTRL_DEASSERT	\
+	(USB3_TEST_RSTCTRL_HARDRESET_ODEN | USB3_TEST_RSTCTRL_PIPERESET_ODEN)
+#define USB3_TEST_RSTCTRL_RELEASE_OVERRIDE	(0)
+
+#define USB3_TEST_CLKCTRL_MPLLA_SSC_EN		BIT(2)
+
+#define USB3_TEST_RAMCTRL_SRAM_INIT_DONE	BIT(2)
+#define USB3_TEST_RAMCTRL_SRAM_EXT_LD_DONE	BIT(0)
+
+#define USB3_TEST_CREGCTRL_PARA_SEL		BIT(8)
+
+#define USB3_TEST_LANECONFIG0_DEFAULT		(0xd)
+
+struct rz_usb3 {
+	void __iomem *base;
+	struct reset_control *rstc;
+	bool skip_reinit;
+};
+
+static void rzg3e_phy_usb2test_phy_init(void __iomem *base)
+{
+	u32 val;
+
+	val = readl(base + USB3_TEST_UTMICTRL2);
+	val |= USB3_TEST_UTMICTRL2_CTRL_MASK | USB3_TEST_UTMICTRL2_MODE_MASK;
+	writel(val, base + USB3_TEST_UTMICTRL2);
+
+	val = readl(base + USB3_TEST_PRMCTRL5_R);
+	FIELD_MODIFY(USB3_TEST_PRMCTRL5_R_TXPREEMPAMPTUNE0_MASK, &val, 2);
+	writel(val, base + USB3_TEST_PRMCTRL5_R);
+
+	val = readl(base + USB3_TEST_PRMCTRL6_R);
+	FIELD_MODIFY(USB3_TEST_PRMCTRL6_R_OTGTUNE0_MASK, &val, 7);
+	writel(val, base + USB3_TEST_PRMCTRL6_R);
+
+	val = readl(base + USB3_TEST_RESET);
+	val &= ~USB3_TEST_RESET_SIDDQ;
+	val |= USB3_TEST_RESET_PORTRESET0_CTRL | USB3_TEST_RESET_PHY_RESET |
+	       USB3_TEST_RESET_PORTRESET0;
+	writel(val, base + USB3_TEST_RESET);
+	fsleep(10);
+
+	val &= ~(USB3_TEST_RESET_PHY_RESET | USB3_TEST_RESET_PORTRESET0);
+	writel(val, base + USB3_TEST_RESET);
+	fsleep(10);
+
+	val = readl(base + USB3_TEST_UTMICTRL2);
+	val &= ~USB3_TEST_UTMICTRL2_CTRL_MASK;
+	writel(val, base + USB3_TEST_UTMICTRL2);
+
+	writel(USB3_TEST_RESET_RELEASE_OVERRIDE, base + USB3_TEST_RESET);
+}
+
+static int rzg3e_phy_usb3test_phy_init(void __iomem *base)
+{
+	int ret;
+	u32 val;
+
+	writel(USB3_TEST_CREGCTRL_PARA_SEL, base + USB3_TEST_CREGCTRL);
+	writel(USB3_TEST_RSTCTRL_ASSERT, base + USB3_TEST_RSTCTRL);
+	fsleep(20);
+
+	writel(USB3_TEST_CLKCTRL_MPLLA_SSC_EN, base + USB3_TEST_CLKCTRL);
+	writel(USB3_TEST_LANECONFIG0_DEFAULT, base + USB3_TEST_LANECONFIG0);
+	writel(USB3_TEST_RSTCTRL_RELEASE_HARDRESET, base + USB3_TEST_RSTCTRL);
+
+	ret = readl_poll_timeout_atomic(base + USB3_TEST_RAMCTRL, val,
+					val & USB3_TEST_RAMCTRL_SRAM_INIT_DONE, 1, 10000);
+	if (ret)
+		return ret;
+
+	writel(USB3_TEST_RSTCTRL_DEASSERT, base + USB3_TEST_RSTCTRL);
+	writel(USB3_TEST_RAMCTRL_SRAM_EXT_LD_DONE, base + USB3_TEST_RAMCTRL);
+	writel(USB3_TEST_RSTCTRL_RELEASE_OVERRIDE, base + USB3_TEST_RSTCTRL);
+
+	return 0;
+}
+
+static int rzg3e_phy_usb3_init_helper(void __iomem *base)
+{
+	rzg3e_phy_usb2test_phy_init(base);
+
+	return rzg3e_phy_usb3test_phy_init(base);
+}
+
+static int rzg3e_phy_usb3_init(struct phy *p)
+{
+	struct rz_usb3 *r = phy_get_drvdata(p);
+	int ret = 0;
+
+	if (!r->skip_reinit)
+		ret = rzg3e_phy_usb3_init_helper(r->base);
+
+	return ret;
+}
+
+static const struct phy_ops rzg3e_phy_usb3_ops = {
+	.init = rzg3e_phy_usb3_init,
+	.owner = THIS_MODULE,
+};
+
+static int rzg3e_phy_usb3_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct phy_provider *provider;
+	struct rz_usb3 *r;
+	struct phy *phy;
+	int ret;
+
+	r = devm_kzalloc(dev, sizeof(*r), GFP_KERNEL);
+	if (!r)
+		return -ENOMEM;
+
+	r->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(r->base))
+		return PTR_ERR(r->base);
+
+	r->rstc = devm_reset_control_get_shared_deasserted(dev, NULL);
+	if (IS_ERR(r->rstc))
+		return dev_err_probe(dev, PTR_ERR(r->rstc), "failed to get deasserted reset\n");
+
+	/*
+	 * devm_phy_create() will call pm_runtime_enable(&phy->dev);
+	 * And then, phy-core will manage runtime pm for this device.
+	 */
+	ret = devm_pm_runtime_enable(dev);
+	if (ret < 0)
+		return ret;
+
+	phy = devm_phy_create(dev, NULL, &rzg3e_phy_usb3_ops);
+	if (IS_ERR(phy))
+		return dev_err_probe(dev, PTR_ERR(phy), "failed to create USB3 PHY\n");
+
+	platform_set_drvdata(pdev, r);
+	phy_set_drvdata(phy, r);
+
+	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(provider))
+		return dev_err_probe(dev, PTR_ERR(provider), "failed to register PHY provider\n");
+
+	return 0;
+}
+
+static int rzg3e_phy_usb3_suspend(struct device *dev)
+{
+	struct rz_usb3 *r = dev_get_drvdata(dev);
+
+	pm_runtime_put(dev);
+	reset_control_assert(r->rstc);
+	r->skip_reinit = false;
+
+	return 0;
+}
+
+static int rzg3e_phy_usb3_resume(struct device *dev)
+{
+	struct rz_usb3 *r = dev_get_drvdata(dev);
+	int ret;
+
+	ret = reset_control_deassert(r->rstc);
+	if (ret)
+		return ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		goto reset_assert;
+
+	ret = rzg3e_phy_usb3_init_helper(r->base);
+	if (ret)
+		goto pm_put;
+
+	r->skip_reinit = true;
+
+	return 0;
+
+pm_put:
+	pm_runtime_put(dev);
+reset_assert:
+	reset_control_assert(r->rstc);
+	return ret;
+}
+
+static const struct dev_pm_ops rzg3e_phy_usb3_pm = {
+	NOIRQ_SYSTEM_SLEEP_PM_OPS(rzg3e_phy_usb3_suspend, rzg3e_phy_usb3_resume)
+};
+
+static const struct of_device_id rzg3e_phy_usb3_match_table[] = {
+	{ .compatible = "renesas,r9a09g047-usb3-phy" },
+	{ /* Sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, rzg3e_phy_usb3_match_table);
+static struct platform_driver rzg3e_phy_usb3_driver = {
+	.driver = {
+		.name = "phy_rzg3e_usb3",
+		.of_match_table = rzg3e_phy_usb3_match_table,
+		.pm = pm_sleep_ptr(&rzg3e_phy_usb3_pm),
+	},
+	.probe	= rzg3e_phy_usb3_probe,
+};
+module_platform_driver(rzg3e_phy_usb3_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Renesas RZ/G3E USB3.0 PHY Driver");
+MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");

linux-7.2.3/drivers/phy/renesas/r8a779f0-ether-serdes.c

@@ -0,0 +1,489 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Renesas Ethernet SERDES device driver
+ *
+ * Copyright (C) 2022-2025 Renesas Electronics Corporation
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#define R8A779F0_ETH_SERDES_NUM			3
+#define R8A779F0_ETH_SERDES_OFFSET		0x0400
+#define R8A779F0_ETH_SERDES_BANK_SELECT		0x03fc
+#define R8A779F0_ETH_SERDES_TIMEOUT_US		100000
+#define R8A779F0_ETH_SERDES_NUM_RETRY_LINKUP	3
+
+struct r8a779f0_eth_serdes_drv_data;
+struct r8a779f0_eth_serdes_channel {
+	struct r8a779f0_eth_serdes_drv_data *dd;
+	struct phy *phy;
+	void __iomem *addr;
+	phy_interface_t phy_interface;
+	int speed;
+	int index;
+};
+
+struct r8a779f0_eth_serdes_drv_data {
+	void __iomem *addr;
+	struct platform_device *pdev;
+	struct reset_control *reset;
+	struct r8a779f0_eth_serdes_channel channel[R8A779F0_ETH_SERDES_NUM];
+	bool initialized;
+};
+
+/*
+ * The datasheet describes initialization procedure without any information
+ * about registers' name/bits. So, this is all black magic to initialize
+ * the hardware.
+ */
+static void r8a779f0_eth_serdes_write32(void __iomem *addr, u32 offs, u32 bank, u32 data)
+{
+	iowrite32(bank, addr + R8A779F0_ETH_SERDES_BANK_SELECT);
+	iowrite32(data, addr + offs);
+}
+
+static u32 r8a779f0_eth_serdes_read32(void __iomem *addr, u32 offs,  u32 bank)
+{
+	iowrite32(bank, addr + R8A779F0_ETH_SERDES_BANK_SELECT);
+
+	return ioread32(addr + offs);
+}
+
+static int
+r8a779f0_eth_serdes_reg_wait(struct r8a779f0_eth_serdes_channel *channel,
+			     u32 offs, u32 bank, u32 mask, u32 expected)
+{
+	int ret;
+	u32 val;
+
+	iowrite32(bank, channel->addr + R8A779F0_ETH_SERDES_BANK_SELECT);
+
+	ret = readl_poll_timeout_atomic(channel->addr + offs, val,
+					(val & mask) == expected,
+					1, R8A779F0_ETH_SERDES_TIMEOUT_US);
+	if (ret)
+		dev_dbg(&channel->phy->dev,
+			"%s: index %d, offs %x, bank %x, mask %x, expected %x\n",
+			 __func__, channel->index, offs, bank, mask, expected);
+
+	return ret;
+}
+
+static int
+r8a779f0_eth_serdes_common_init_ram(struct r8a779f0_eth_serdes_drv_data *dd)
+{
+	struct r8a779f0_eth_serdes_channel *channel;
+	int i, ret;
+
+	for (i = 0; i < R8A779F0_ETH_SERDES_NUM; i++) {
+		channel = &dd->channel[i];
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x026c, 0x180, BIT(0), 0x01);
+		if (ret)
+			return ret;
+	}
+
+	r8a779f0_eth_serdes_write32(dd->addr, 0x026c, 0x180, 0x03);
+
+	return ret;
+}
+
+static int
+r8a779f0_eth_serdes_common_setting(struct r8a779f0_eth_serdes_channel *channel)
+{
+	struct r8a779f0_eth_serdes_drv_data *dd = channel->dd;
+
+	/* Set combination mode */
+	r8a779f0_eth_serdes_write32(dd->addr, 0x0244, 0x180, 0x00d7);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01cc, 0x180, 0xc200);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01c4, 0x180, 0x0042);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01c8, 0x180, 0x0000);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01dc, 0x180, 0x002f);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01d0, 0x180, 0x0060);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01d8, 0x180, 0x2200);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01d4, 0x180, 0x0000);
+	r8a779f0_eth_serdes_write32(dd->addr, 0x01e0, 0x180, 0x003d);
+
+	return 0;
+}
+
+static int
+r8a779f0_eth_serdes_chan_setting(struct r8a779f0_eth_serdes_channel *channel)
+{
+	int ret;
+
+	switch (channel->phy_interface) {
+	case PHY_INTERFACE_MODE_SGMII:
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x380, 0x2000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x01c0, 0x180, 0x0011);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0248, 0x180, 0x0540);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0258, 0x180, 0x0015);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, 0x0100);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x01a0, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00d0, 0x180, 0x0002);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0150, 0x180, 0x0003);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c8, 0x180, 0x0100);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0148, 0x180, 0x0100);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0174, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0160, 0x180, 0x0007);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x01ac, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c4, 0x180, 0x0310);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c8, 0x180, 0x0101);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x00c8, 0x0180, BIT(0), 0);
+		if (ret)
+			return ret;
+
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0148, 0x180, 0x0101);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0148, 0x0180, BIT(0), 0);
+		if (ret)
+			return ret;
+
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c4, 0x180, 0x1310);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00d8, 0x180, 0x1800);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00dc, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x001c, 0x300, 0x0001);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x380, 0x2100);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0000, 0x0380, BIT(8), 0);
+		if (ret)
+			return ret;
+
+		if (channel->speed == 1000)
+			r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x1f00, 0x0140);
+		else if (channel->speed == 100)
+			r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x1f00, 0x2100);
+
+		/* For AN_ON */
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0004, 0x1f80, 0x0005);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0028, 0x1f80, 0x07a1);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x1f80, 0x0208);
+		break;
+
+	case PHY_INTERFACE_MODE_USXGMII:
+		r8a779f0_eth_serdes_write32(channel->addr, 0x001c, 0x300, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0014, 0x380, 0x0050);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x380, 0x2200);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x001c, 0x380, 0x0400);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x01c0, 0x180, 0x0001);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0248, 0x180, 0x056a);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0258, 0x180, 0x0015);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, 0x1100);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x01a0, 0x180, 0x0001);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00d0, 0x180, 0x0001);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0150, 0x180, 0x0001);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c8, 0x180, 0x0300);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0148, 0x180, 0x0300);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0174, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0160, 0x180, 0x0004);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x01ac, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c4, 0x180, 0x0310);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c8, 0x180, 0x0301);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x00c8, 0x180, BIT(0), 0);
+		if (ret)
+			return ret;
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0148, 0x180, 0x0301);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0148, 0x180, BIT(0), 0);
+		if (ret)
+			return ret;
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00c4, 0x180, 0x1310);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00d8, 0x180, 0x1800);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x00dc, 0x180, 0x0000);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x380, 0x2300);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0000, 0x380, BIT(8), 0);
+		if (ret)
+			return ret;
+		break;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static int
+r8a779f0_eth_serdes_chan_speed(struct r8a779f0_eth_serdes_channel *channel)
+{
+	int ret;
+
+	switch (channel->phy_interface) {
+	case PHY_INTERFACE_MODE_SGMII:
+		/* For AN_ON */
+		if (channel->speed == 1000)
+			r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x1f00, 0x1140);
+		else if (channel->speed == 100)
+			r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x1f00, 0x3100);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0008, 0x1f80, BIT(0), 1);
+		if (ret)
+			return ret;
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0008, 0x1f80, 0x0000);
+		break;
+	case PHY_INTERFACE_MODE_USXGMII:
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x1f00, 0x0120);
+		usleep_range(10, 20);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0000, 0x380, 0x2600);
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0000, 0x380, BIT(10), 0);
+		if (ret)
+			return ret;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+
+static int r8a779f0_eth_serdes_monitor_linkup(struct r8a779f0_eth_serdes_channel *channel)
+{
+	int i, ret;
+
+	for (i = 0; i < R8A779F0_ETH_SERDES_NUM_RETRY_LINKUP; i++) {
+		ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0004, 0x300,
+						   BIT(2), BIT(2));
+		if (!ret)
+			break;
+
+		/* restart */
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, 0x0100);
+		udelay(1);
+		r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, 0x0000);
+	}
+
+	return ret;
+}
+
+static int r8a779f0_eth_serdes_hw_init(struct r8a779f0_eth_serdes_channel *channel)
+{
+	struct r8a779f0_eth_serdes_drv_data *dd = channel->dd;
+	int i, ret;
+
+	if (dd->initialized)
+		return 0;
+
+	reset_control_reset(dd->reset);
+
+	usleep_range(1000, 2000);
+
+	ret = r8a779f0_eth_serdes_common_init_ram(dd);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < R8A779F0_ETH_SERDES_NUM; i++) {
+		ret = r8a779f0_eth_serdes_reg_wait(&dd->channel[i], 0x0000,
+						   0x300, BIT(15), 0);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < R8A779F0_ETH_SERDES_NUM; i++)
+		r8a779f0_eth_serdes_write32(dd->channel[i].addr, 0x03d4, 0x380, 0x0443);
+
+	ret = r8a779f0_eth_serdes_common_setting(channel);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < R8A779F0_ETH_SERDES_NUM; i++)
+		r8a779f0_eth_serdes_write32(dd->channel[i].addr, 0x03d0, 0x380, 0x0001);
+
+
+	r8a779f0_eth_serdes_write32(dd->addr, 0x0000, 0x380, 0x8000);
+
+	ret = r8a779f0_eth_serdes_common_init_ram(dd);
+	if (ret)
+		return ret;
+
+	return r8a779f0_eth_serdes_reg_wait(&dd->channel[0], 0x0000, 0x380, BIT(15), 0);
+}
+
+static int r8a779f0_eth_serdes_init(struct phy *p)
+{
+	struct r8a779f0_eth_serdes_channel *channel = phy_get_drvdata(p);
+	int ret;
+
+	ret = r8a779f0_eth_serdes_hw_init(channel);
+	if (!ret)
+		channel->dd->initialized = true;
+
+	return ret;
+}
+
+static int r8a779f0_eth_serdes_exit(struct phy *p)
+{
+	struct r8a779f0_eth_serdes_channel *channel = phy_get_drvdata(p);
+
+	channel->dd->initialized = false;
+
+	return 0;
+}
+
+static int r8a779f0_eth_serdes_hw_init_late(struct r8a779f0_eth_serdes_channel
+*channel)
+{
+	int ret;
+	u32 val;
+
+	ret = r8a779f0_eth_serdes_chan_setting(channel);
+	if (ret)
+		return ret;
+
+	ret = r8a779f0_eth_serdes_chan_speed(channel);
+	if (ret)
+		return ret;
+
+	r8a779f0_eth_serdes_write32(channel->addr, 0x03c0, 0x380, 0x0000);
+
+	r8a779f0_eth_serdes_write32(channel->addr, 0x03d0, 0x380, 0x0000);
+
+	val = r8a779f0_eth_serdes_read32(channel->addr, 0x00c0, 0x180);
+	r8a779f0_eth_serdes_write32(channel->addr, 0x00c0, 0x180, val | BIT(8));
+	ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0100, 0x180, BIT(0), 1);
+	if (ret)
+		return ret;
+	r8a779f0_eth_serdes_write32(channel->addr, 0x00c0, 0x180, val & ~BIT(8));
+	ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0100, 0x180, BIT(0), 0);
+	if (ret)
+		return ret;
+
+	val = r8a779f0_eth_serdes_read32(channel->addr, 0x0144, 0x180);
+	r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, val | BIT(4));
+	ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0180, 0x180, BIT(0), 1);
+	if (ret)
+		return ret;
+	r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, val & ~BIT(4));
+	ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0180, 0x180, BIT(0), 0);
+	if (ret)
+		return ret;
+
+	return r8a779f0_eth_serdes_monitor_linkup(channel);
+}
+
+static int r8a779f0_eth_serdes_power_on(struct phy *p)
+{
+	struct r8a779f0_eth_serdes_channel *channel = phy_get_drvdata(p);
+
+	return r8a779f0_eth_serdes_hw_init_late(channel);
+}
+
+static int r8a779f0_eth_serdes_set_mode(struct phy *p, enum phy_mode mode,
+					int submode)
+{
+	struct r8a779f0_eth_serdes_channel *channel = phy_get_drvdata(p);
+
+	if (mode != PHY_MODE_ETHERNET)
+		return -EOPNOTSUPP;
+
+	switch (submode) {
+	case PHY_INTERFACE_MODE_GMII:
+	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_USXGMII:
+		channel->phy_interface = submode;
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int r8a779f0_eth_serdes_set_speed(struct phy *p, int speed)
+{
+	struct r8a779f0_eth_serdes_channel *channel = phy_get_drvdata(p);
+
+	channel->speed = speed;
+
+	return 0;
+}
+
+static const struct phy_ops r8a779f0_eth_serdes_ops = {
+	.init		= r8a779f0_eth_serdes_init,
+	.exit		= r8a779f0_eth_serdes_exit,
+	.power_on	= r8a779f0_eth_serdes_power_on,
+	.set_mode	= r8a779f0_eth_serdes_set_mode,
+	.set_speed	= r8a779f0_eth_serdes_set_speed,
+};
+
+static struct phy *r8a779f0_eth_serdes_xlate(struct device *dev,
+					     const struct of_phandle_args *args)
+{
+	struct r8a779f0_eth_serdes_drv_data *dd = dev_get_drvdata(dev);
+
+	if (args->args[0] >= R8A779F0_ETH_SERDES_NUM)
+		return ERR_PTR(-ENODEV);
+
+	return dd->channel[args->args[0]].phy;
+}
+
+static const struct of_device_id r8a779f0_eth_serdes_of_table[] = {
+	{ .compatible = "renesas,r8a779f0-ether-serdes", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, r8a779f0_eth_serdes_of_table);
+
+static int r8a779f0_eth_serdes_probe(struct platform_device *pdev)
+{
+	struct r8a779f0_eth_serdes_drv_data *dd;
+	struct phy_provider *provider;
+	int i;
+
+	dd = devm_kzalloc(&pdev->dev, sizeof(*dd), GFP_KERNEL);
+	if (!dd)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, dd);
+	dd->pdev = pdev;
+	dd->addr = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dd->addr))
+		return PTR_ERR(dd->addr);
+
+	dd->reset = devm_reset_control_get(&pdev->dev, NULL);
+	if (IS_ERR(dd->reset))
+		return PTR_ERR(dd->reset);
+
+	for (i = 0; i < R8A779F0_ETH_SERDES_NUM; i++) {
+		struct r8a779f0_eth_serdes_channel *channel = &dd->channel[i];
+
+		channel->phy = devm_phy_create(&pdev->dev, NULL,
+					       &r8a779f0_eth_serdes_ops);
+		if (IS_ERR(channel->phy))
+			return PTR_ERR(channel->phy);
+		channel->addr = dd->addr + R8A779F0_ETH_SERDES_OFFSET * i;
+		channel->dd = dd;
+		channel->index = i;
+		phy_set_drvdata(channel->phy, channel);
+	}
+
+	provider = devm_of_phy_provider_register(&pdev->dev,
+						 r8a779f0_eth_serdes_xlate);
+	if (IS_ERR(provider))
+		return PTR_ERR(provider);
+
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
+
+	return 0;
+}
+
+static void r8a779f0_eth_serdes_remove(struct platform_device *pdev)
+{
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	platform_set_drvdata(pdev, NULL);
+}
+
+static struct platform_driver r8a779f0_eth_serdes_driver_platform = {
+	.probe = r8a779f0_eth_serdes_probe,
+	.remove = r8a779f0_eth_serdes_remove,
+	.driver = {
+		.name = "r8a779f0_eth_serdes",
+		.of_match_table = r8a779f0_eth_serdes_of_table,
+	}
+};
+module_platform_driver(r8a779f0_eth_serdes_driver_platform);
+MODULE_AUTHOR("Yoshihiro Shimoda");
+MODULE_DESCRIPTION("Renesas Ethernet SERDES device driver");
+MODULE_LICENSE("GPL");