diff options
Diffstat (limited to 'drivers/phy/renesas')
| -rw-r--r-- | drivers/phy/renesas/Kconfig | 51 | ||||
| -rw-r--r-- | drivers/phy/renesas/Makefile | 7 | ||||
| -rw-r--r-- | drivers/phy/renesas/phy-rcar-gen2.c | 439 | ||||
| -rw-r--r-- | drivers/phy/renesas/phy-rcar-gen3-pcie.c | 146 | ||||
| -rw-r--r-- | drivers/phy/renesas/phy-rcar-gen3-usb2.c | 1129 | ||||
| -rw-r--r-- | drivers/phy/renesas/phy-rcar-gen3-usb3.c | 219 | ||||
| -rw-r--r-- | drivers/phy/renesas/phy-rzg3e-usb3.c | 257 | ||||
| -rw-r--r-- | drivers/phy/renesas/r8a779f0-ether-serdes.c | 489 |
8 files changed, 2737 insertions, 0 deletions
diff --git a/drivers/phy/renesas/Kconfig b/drivers/phy/renesas/Kconfig new file mode 100644 index 000000000..90a9ca2db --- /dev/null +++ b/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. diff --git a/drivers/phy/renesas/Makefile b/drivers/phy/renesas/Makefile new file mode 100644 index 000000000..0e98083f2 --- /dev/null +++ b/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 diff --git a/drivers/phy/renesas/phy-rcar-gen2.c b/drivers/phy/renesas/phy-rcar-gen2.c new file mode 100644 index 000000000..5a272e25e --- /dev/null +++ b/drivers/phy/renesas/phy-rcar-gen2.c @@ -0,0 +1,439 @@ +// 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"); + 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>"); diff --git a/drivers/phy/renesas/phy-rcar-gen3-pcie.c b/drivers/phy/renesas/phy-rcar-gen3-pcie.c new file mode 100644 index 000000000..c0e5a4ac8 --- /dev/null +++ b/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>"); diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c new file mode 100644 index 000000000..9ae9975d3 --- /dev/null +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c @@ -0,0 +1,1129 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas R-Car Gen3 for USB2.0 PHY driver + * + * Copyright (C) 2015-2017 Renesas Electronics Corporation + * + * This is based on the phy-rcar-gen2 driver: + * Copyright (C) 2014 Renesas Solutions Corp. + * Copyright (C) 2014 Cogent Embedded, Inc. + */ + +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/cleanup.h> +#include <linux/extcon-provider.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/mux/consumer.h> +#include <linux/of.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <linux/regulator/driver.h> +#include <linux/reset.h> +#include <linux/string.h> +#include <linux/usb/of.h> +#include <linux/workqueue.h> + +/******* USB2.0 Host registers (original offset is +0x200) *******/ +#define USB2_INT_ENABLE 0x000 +#define USB2_AHB_BUS_CTR 0x008 +#define USB2_USBCTR 0x00c +#define USB2_REGEN_CG_CTRL 0x104 /* RZ/V2H(P) only */ +#define USB2_SPD_RSM_TIMSET 0x10c +#define USB2_OC_TIMSET 0x110 +#define USB2_UTMI_CTRL 0x118 /* RZ/V2H(P) only */ +#define USB2_COMMCTRL 0x600 +#define USB2_OBINTSTA 0x604 +#define USB2_OBINTEN 0x608 +#define USB2_VBCTRL 0x60c +#define USB2_LINECTRL1 0x610 +#define USB2_ADPCTRL 0x630 + +/* INT_ENABLE */ +#define USB2_INT_ENABLE_UCOM_INTEN BIT(3) +#define USB2_INT_ENABLE_USBH_INTB_EN BIT(2) /* For EHCI */ +#define USB2_INT_ENABLE_USBH_INTA_EN BIT(1) /* For OHCI */ + +/* AHB_BUS_CTR */ +#define USB2_AHB_BUS_CTR_MBL_MASK GENMASK(1, 0) +#define USB2_AHB_BUS_CTR_MBL_INCR4 2 + +/* USBCTR */ +#define USB2_USBCTR_DIRPD BIT(2) +#define USB2_USBCTR_PLL_RST BIT(1) + +/* REGEN_CG_CTRL*/ +#define USB2_REGEN_CG_CTRL_UPHY_WEN BIT(0) + +/* SPD_RSM_TIMSET */ +#define USB2_SPD_RSM_TIMSET_INIT 0x014e029b + +/* OC_TIMSET */ +#define USB2_OC_TIMSET_INIT 0x000209ab + +/* UTMI_CTRL */ +#define USB2_UTMI_CTRL_INIT 0x8000018f + +/* COMMCTRL */ +#define USB2_COMMCTRL_OTG_PERI BIT(31) /* 1 = Peripheral mode */ + +/* OBINTSTA and OBINTEN */ +#define USB2_OBINTSTA_CLEAR GENMASK(31, 0) +#define USB2_OBINT_SESSVLDCHG BIT(12) +#define USB2_OBINT_IDDIGCHG BIT(11) +#define USB2_OBINT_VBSTAINT BIT(3) +#define USB2_OBINT_IDCHG_EN BIT(0) /* RZ/G2L specific */ + +/* VBCTRL */ +#define USB2_VBCTRL_VBSTA_MASK GENMASK(31, 28) +#define USB2_VBCTRL_VBSTA_DEFAULT 2 +#define USB2_VBCTRL_VBLVL_MASK GENMASK(23, 20) +#define USB2_VBCTRL_VBLVL(m) FIELD_PREP_CONST(USB2_VBCTRL_VBLVL_MASK, (m)) +#define USB2_VBCTRL_OCCLREN BIT(16) +#define USB2_VBCTRL_DRVVBUSSEL BIT(8) +#define USB2_VBCTRL_SIDDQREL BIT(2) +#define USB2_VBCTRL_VBOUT BIT(0) + +/* LINECTRL1 */ +#define USB2_LINECTRL1_DPRPD_EN BIT(19) +#define USB2_LINECTRL1_DP_RPD BIT(18) +#define USB2_LINECTRL1_DMRPD_EN BIT(17) +#define USB2_LINECTRL1_DM_RPD BIT(16) +#define USB2_LINECTRL1_OPMODE_NODRV BIT(6) + +/* ADPCTRL */ +#define USB2_ADPCTRL_OTGSESSVLD BIT(20) +#define USB2_ADPCTRL_IDDIG BIT(19) +#define USB2_ADPCTRL_VBUSVALID BIT(18) +#define USB2_ADPCTRL_IDPULLUP BIT(5) /* 1 = ID sampling is enabled */ +#define USB2_ADPCTRL_DRVVBUS BIT(4) + +/* RZ/G2L specific */ +#define USB2_LINECTRL1_USB2_IDMON BIT(0) + +#define NUM_OF_PHYS 4 +enum rcar_gen3_phy_index { + PHY_INDEX_BOTH_HC, + PHY_INDEX_OHCI, + PHY_INDEX_EHCI, + PHY_INDEX_HSUSB +}; + +static const u32 rcar_gen3_int_enable[NUM_OF_PHYS] = { + USB2_INT_ENABLE_USBH_INTB_EN | USB2_INT_ENABLE_USBH_INTA_EN, + USB2_INT_ENABLE_USBH_INTA_EN, + USB2_INT_ENABLE_USBH_INTB_EN, + 0 +}; + +struct rcar_gen3_phy { + struct phy *phy; + struct rcar_gen3_chan *ch; + u32 int_enable_bits; + bool initialized; + bool powered; +}; + +struct rcar_gen3_chan { + void __iomem *base; + struct device *dev; /* platform_device's device */ + const struct rcar_gen3_phy_drv_data *phy_data; + struct extcon_dev *extcon; + struct reset_control *rstc; + struct rcar_gen3_phy rphys[NUM_OF_PHYS]; + struct regulator *vbus; + struct work_struct work; + spinlock_t lock; /* protects access to hardware and driver data structure. */ + enum usb_dr_mode dr_mode; + bool extcon_host; + bool is_otg_channel; + bool uses_otg_pins; + bool otg_internal_reg; +}; + +struct rcar_gen3_phy_drv_data { + const struct phy_ops *phy_usb2_ops; + bool no_adp_ctrl; + bool init_bus; + bool utmi_ctrl; + bool vblvl_ctrl; + u32 obint_enable_bits; +}; + +/* + * Combination about is_otg_channel and uses_otg_pins: + * + * Parameters || Behaviors + * is_otg_channel | uses_otg_pins || irqs | role sysfs + * ---------------------+---------------++--------------+------------ + * true | true || enabled | enabled + * true | false || disabled | enabled + * false | any || disabled | disabled + */ + +static void rcar_gen3_phy_usb2_work(struct work_struct *work) +{ + struct rcar_gen3_chan *ch = container_of(work, struct rcar_gen3_chan, + work); + + if (ch->extcon_host) { + extcon_set_state_sync(ch->extcon, EXTCON_USB_HOST, true); + extcon_set_state_sync(ch->extcon, EXTCON_USB, false); + } else { + extcon_set_state_sync(ch->extcon, EXTCON_USB_HOST, false); + extcon_set_state_sync(ch->extcon, EXTCON_USB, true); + } +} + +static void rcar_gen3_set_host_mode(struct rcar_gen3_chan *ch, int host) +{ + void __iomem *usb2_base = ch->base; + u32 val = readl(usb2_base + USB2_COMMCTRL); + + dev_vdbg(ch->dev, "%s: %08x, %d\n", __func__, val, host); + if (host) + val &= ~USB2_COMMCTRL_OTG_PERI; + else + val |= USB2_COMMCTRL_OTG_PERI; + writel(val, usb2_base + USB2_COMMCTRL); +} + +static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm) +{ + void __iomem *usb2_base = ch->base; + u32 val = readl(usb2_base + USB2_LINECTRL1); + + dev_vdbg(ch->dev, "%s: %08x, %d, %d\n", __func__, val, dp, dm); + val &= ~(USB2_LINECTRL1_DP_RPD | USB2_LINECTRL1_DM_RPD); + if (dp) + val |= USB2_LINECTRL1_DP_RPD; + if (dm) + val |= USB2_LINECTRL1_DM_RPD; + writel(val, usb2_base + USB2_LINECTRL1); +} + +static void rcar_gen3_phy_usb2_set_vbus(struct rcar_gen3_chan *ch, + u32 vbus_ctrl_reg, + u32 vbus_ctrl_val, + bool enable) +{ + void __iomem *usb2_base = ch->base; + u32 val; + + val = readl(usb2_base + vbus_ctrl_reg); + if (enable) + val |= vbus_ctrl_val; + else + val &= ~vbus_ctrl_val; + writel(val, usb2_base + vbus_ctrl_reg); + + dev_vdbg(ch->dev, "%s: reg=0x%08x, val=%08x, enable=%d\n", + __func__, vbus_ctrl_reg, val, enable); +} + +static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus) +{ + if (ch->otg_internal_reg) { + regulator_hardware_enable(ch->vbus, vbus); + return; + } + + if (ch->phy_data->no_adp_ctrl || ch->phy_data->vblvl_ctrl) { + if (ch->vbus) + regulator_hardware_enable(ch->vbus, vbus); + + rcar_gen3_phy_usb2_set_vbus(ch, USB2_VBCTRL, + USB2_VBCTRL_VBOUT, vbus); + return; + } + + rcar_gen3_phy_usb2_set_vbus(ch, USB2_ADPCTRL, + USB2_ADPCTRL_DRVVBUS, vbus); +} + +static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable) +{ + void __iomem *usb2_base = ch->base; + u32 val = readl(usb2_base + USB2_OBINTEN); + + if (ch->uses_otg_pins && enable) + val |= ch->phy_data->obint_enable_bits; + else + val &= ~ch->phy_data->obint_enable_bits; + writel(val, usb2_base + USB2_OBINTEN); +} + +static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch) +{ + rcar_gen3_set_linectrl(ch, 1, 1); + rcar_gen3_set_host_mode(ch, 1); + rcar_gen3_enable_vbus_ctrl(ch, 1); + + ch->extcon_host = true; + schedule_work(&ch->work); +} + +static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch) +{ + rcar_gen3_set_linectrl(ch, 0, 1); + rcar_gen3_set_host_mode(ch, 0); + rcar_gen3_enable_vbus_ctrl(ch, 0); + + ch->extcon_host = false; + schedule_work(&ch->work); +} + +static void rcar_gen3_init_for_b_host(struct rcar_gen3_chan *ch) +{ + void __iomem *usb2_base = ch->base; + u32 val; + + val = readl(usb2_base + USB2_LINECTRL1); + writel(val | USB2_LINECTRL1_OPMODE_NODRV, usb2_base + USB2_LINECTRL1); + + rcar_gen3_set_linectrl(ch, 1, 1); + rcar_gen3_set_host_mode(ch, 1); + rcar_gen3_enable_vbus_ctrl(ch, 0); + + val = readl(usb2_base + USB2_LINECTRL1); + writel(val & ~USB2_LINECTRL1_OPMODE_NODRV, usb2_base + USB2_LINECTRL1); +} + +static void rcar_gen3_init_for_a_peri(struct rcar_gen3_chan *ch) +{ + rcar_gen3_set_linectrl(ch, 0, 1); + rcar_gen3_set_host_mode(ch, 0); + rcar_gen3_enable_vbus_ctrl(ch, 1); +} + +static void rcar_gen3_init_from_a_peri_to_a_host(struct rcar_gen3_chan *ch) +{ + rcar_gen3_control_otg_irq(ch, 0); + + rcar_gen3_enable_vbus_ctrl(ch, 1); + rcar_gen3_init_for_host(ch); + + rcar_gen3_control_otg_irq(ch, 1); +} + +static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch) +{ + if (ch->phy_data->vblvl_ctrl) { + u32 val = readl(ch->base + USB2_ADPCTRL); + bool vbus_valid = val & USB2_ADPCTRL_VBUSVALID; + bool device = val & USB2_ADPCTRL_IDDIG; + + return device == vbus_valid; + } + + if (!ch->uses_otg_pins) + return ch->dr_mode != USB_DR_MODE_HOST; + + if (ch->phy_data->no_adp_ctrl) + return !!(readl(ch->base + USB2_LINECTRL1) & USB2_LINECTRL1_USB2_IDMON); + + return !!(readl(ch->base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG); +} + +static void rcar_gen3_device_recognition(struct rcar_gen3_chan *ch) +{ + if (!rcar_gen3_check_id(ch)) + rcar_gen3_init_for_host(ch); + else + rcar_gen3_init_for_peri(ch); +} + +static bool rcar_gen3_is_host(struct rcar_gen3_chan *ch) +{ + return !(readl(ch->base + USB2_COMMCTRL) & USB2_COMMCTRL_OTG_PERI); +} + +static enum phy_mode rcar_gen3_get_phy_mode(struct rcar_gen3_chan *ch) +{ + if (rcar_gen3_is_host(ch)) + return PHY_MODE_USB_HOST; + + return PHY_MODE_USB_DEVICE; +} + +static bool rcar_gen3_is_any_rphy_initialized(struct rcar_gen3_chan *ch) +{ + int i; + + for (i = 0; i < NUM_OF_PHYS; i++) { + if (ch->rphys[i].initialized) + return true; + } + + return false; +} + +static bool rcar_gen3_is_any_otg_rphy_initialized(struct rcar_gen3_chan *ch) +{ + for (enum rcar_gen3_phy_index i = PHY_INDEX_BOTH_HC; i <= PHY_INDEX_EHCI; + i++) { + if (ch->rphys[i].initialized) + return true; + } + + return false; +} + +static bool rcar_gen3_are_all_rphys_power_off(struct rcar_gen3_chan *ch) +{ + int i; + + for (i = 0; i < NUM_OF_PHYS; i++) { + if (ch->rphys[i].powered) + return false; + } + + return true; +} + +static ssize_t role_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct rcar_gen3_chan *ch = dev_get_drvdata(dev); + bool is_b_device; + enum phy_mode cur_mode, new_mode; + + guard(spinlock_irqsave)(&ch->lock); + + if (!ch->is_otg_channel || !rcar_gen3_is_any_otg_rphy_initialized(ch)) + return -EIO; + + if (sysfs_streq(buf, "host")) + new_mode = PHY_MODE_USB_HOST; + else if (sysfs_streq(buf, "peripheral")) + new_mode = PHY_MODE_USB_DEVICE; + else + return -EINVAL; + + /* is_b_device: true is B-Device. false is A-Device. */ + is_b_device = rcar_gen3_check_id(ch); + cur_mode = rcar_gen3_get_phy_mode(ch); + + /* If current and new mode is the same, this returns the error */ + if (cur_mode == new_mode) + return -EINVAL; + + if (new_mode == PHY_MODE_USB_HOST) { /* And is_host must be false */ + if (!is_b_device) /* A-Peripheral */ + rcar_gen3_init_from_a_peri_to_a_host(ch); + else /* B-Peripheral */ + rcar_gen3_init_for_b_host(ch); + } else { /* And is_host must be true */ + if (!is_b_device) /* A-Host */ + rcar_gen3_init_for_a_peri(ch); + else /* B-Host */ + rcar_gen3_init_for_peri(ch); + } + + return count; +} + +static ssize_t role_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct rcar_gen3_chan *ch = dev_get_drvdata(dev); + + if (!ch->is_otg_channel || !rcar_gen3_is_any_otg_rphy_initialized(ch)) + return -EIO; + + return sprintf(buf, "%s\n", rcar_gen3_is_host(ch) ? "host" : + "peripheral"); +} +static DEVICE_ATTR_RW(role); + +static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch) +{ + void __iomem *usb2_base = ch->base; + u32 val; + + if (!ch->is_otg_channel || rcar_gen3_is_any_otg_rphy_initialized(ch)) + return; + + /* Should not use functions of read-modify-write a register */ + val = readl(usb2_base + USB2_LINECTRL1); + val = (val & ~USB2_LINECTRL1_DP_RPD) | USB2_LINECTRL1_DPRPD_EN | + USB2_LINECTRL1_DMRPD_EN | USB2_LINECTRL1_DM_RPD; + writel(val, usb2_base + USB2_LINECTRL1); + + if (!ch->phy_data->no_adp_ctrl) { + if (ch->phy_data->vblvl_ctrl) { + val = readl(usb2_base + USB2_VBCTRL); + val = (val & ~USB2_VBCTRL_VBLVL_MASK) | USB2_VBCTRL_VBLVL(2); + writel(val, usb2_base + USB2_VBCTRL); + val = readl(usb2_base + USB2_ADPCTRL); + writel(val | USB2_ADPCTRL_IDPULLUP | USB2_ADPCTRL_DRVVBUS, + usb2_base + USB2_ADPCTRL); + } else { + val = readl(usb2_base + USB2_VBCTRL); + val &= ~USB2_VBCTRL_OCCLREN; + writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL); + val = readl(usb2_base + USB2_ADPCTRL); + writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL); + } + } + mdelay(20); + + writel(0xffffffff, usb2_base + USB2_OBINTSTA); + writel(ch->phy_data->obint_enable_bits, usb2_base + USB2_OBINTEN); + + rcar_gen3_device_recognition(ch); +} + +static void rcar_gen3_configure_vblvl_ctrl(struct rcar_gen3_chan *ch) +{ + void __iomem *usb2_base = ch->base; + u32 val; + + if (!ch->phy_data->vblvl_ctrl) + return; + + val = readl(usb2_base + USB2_VBCTRL); + if ((val & USB2_VBCTRL_VBSTA_MASK) == + FIELD_PREP_CONST(USB2_VBCTRL_VBSTA_MASK, USB2_VBCTRL_VBSTA_DEFAULT)) + val &= ~USB2_VBCTRL_VBLVL_MASK; + else + val |= USB2_VBCTRL_VBLVL(USB2_VBCTRL_VBSTA_DEFAULT); + writel(val, usb2_base + USB2_VBCTRL); +} + +static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch) +{ + struct rcar_gen3_chan *ch = _ch; + void __iomem *usb2_base = ch->base; + struct device *dev = ch->dev; + irqreturn_t ret = IRQ_NONE; + u32 status; + + pm_runtime_get_noresume(dev); + + if (pm_runtime_suspended(dev)) + goto rpm_put; + + scoped_guard(spinlock, &ch->lock) { + status = readl(usb2_base + USB2_OBINTSTA); + if (status & ch->phy_data->obint_enable_bits) { + dev_vdbg(dev, "%s: %08x\n", __func__, status); + if (ch->phy_data->vblvl_ctrl) + writel(USB2_OBINTSTA_CLEAR, usb2_base + USB2_OBINTSTA); + else + writel(ch->phy_data->obint_enable_bits, usb2_base + USB2_OBINTSTA); + rcar_gen3_device_recognition(ch); + rcar_gen3_configure_vblvl_ctrl(ch); + ret = IRQ_HANDLED; + } + } + +rpm_put: + pm_runtime_put_noidle(dev); + return ret; +} + +static int rcar_gen3_phy_usb2_init(struct phy *p) +{ + struct rcar_gen3_phy *rphy = phy_get_drvdata(p); + struct rcar_gen3_chan *channel = rphy->ch; + void __iomem *usb2_base = channel->base; + u32 val; + + guard(spinlock_irqsave)(&channel->lock); + + /* Initialize USB2 part */ + val = readl(usb2_base + USB2_INT_ENABLE); + val |= USB2_INT_ENABLE_UCOM_INTEN | rphy->int_enable_bits; + writel(val, usb2_base + USB2_INT_ENABLE); + + if (!rcar_gen3_is_any_rphy_initialized(channel)) { + writel(USB2_SPD_RSM_TIMSET_INIT, usb2_base + USB2_SPD_RSM_TIMSET); + writel(USB2_OC_TIMSET_INIT, usb2_base + USB2_OC_TIMSET); + } + + /* Initialize otg part (only if we initialize a PHY with IRQs). */ + if (rphy->int_enable_bits) + rcar_gen3_init_otg(channel); + + if (channel->phy_data->vblvl_ctrl) { + /* SIDDQ mode release */ + writel(readl(usb2_base + USB2_VBCTRL) | USB2_VBCTRL_SIDDQREL, + usb2_base + USB2_VBCTRL); + udelay(250); + } + + if (channel->phy_data->utmi_ctrl) { + val = readl(usb2_base + USB2_REGEN_CG_CTRL) | USB2_REGEN_CG_CTRL_UPHY_WEN; + writel(val, usb2_base + USB2_REGEN_CG_CTRL); + + writel(USB2_UTMI_CTRL_INIT, usb2_base + USB2_UTMI_CTRL); + writel(val & ~USB2_REGEN_CG_CTRL_UPHY_WEN, usb2_base + USB2_REGEN_CG_CTRL); + } + + rphy->initialized = true; + + return 0; +} + +static int rcar_gen3_phy_usb2_exit(struct phy *p) +{ + struct rcar_gen3_phy *rphy = phy_get_drvdata(p); + struct rcar_gen3_chan *channel = rphy->ch; + void __iomem *usb2_base = channel->base; + u32 val; + + guard(spinlock_irqsave)(&channel->lock); + + rphy->initialized = false; + + val = readl(usb2_base + USB2_INT_ENABLE); + val &= ~rphy->int_enable_bits; + if (!rcar_gen3_is_any_rphy_initialized(channel)) + val &= ~USB2_INT_ENABLE_UCOM_INTEN; + writel(val, usb2_base + USB2_INT_ENABLE); + + return 0; +} + +static int rcar_gen3_phy_usb2_power_on(struct phy *p) +{ + struct rcar_gen3_phy *rphy = phy_get_drvdata(p); + struct rcar_gen3_chan *channel = rphy->ch; + void __iomem *usb2_base = channel->base; + u32 val; + int ret = 0; + + if (channel->vbus && !channel->otg_internal_reg) { + ret = regulator_enable(channel->vbus); + if (ret) + return ret; + } + + guard(spinlock_irqsave)(&channel->lock); + + if (!rcar_gen3_are_all_rphys_power_off(channel)) + goto out; + + val = readl(usb2_base + USB2_USBCTR); + val |= USB2_USBCTR_PLL_RST; + writel(val, usb2_base + USB2_USBCTR); + val &= ~USB2_USBCTR_PLL_RST; + writel(val, usb2_base + USB2_USBCTR); + +out: + /* The powered flag should be set for any other phys anyway */ + rphy->powered = true; + + return 0; +} + +static int rcar_gen3_phy_usb2_power_off(struct phy *p) +{ + struct rcar_gen3_phy *rphy = phy_get_drvdata(p); + struct rcar_gen3_chan *channel = rphy->ch; + int ret = 0; + + scoped_guard(spinlock_irqsave, &channel->lock) { + rphy->powered = false; + + if (rcar_gen3_are_all_rphys_power_off(channel)) { + u32 val = readl(channel->base + USB2_USBCTR); + + val |= USB2_USBCTR_PLL_RST; + writel(val, channel->base + USB2_USBCTR); + } + } + + if (channel->vbus && !channel->otg_internal_reg) + ret = regulator_disable(channel->vbus); + + return ret; +} + +static const struct phy_ops rcar_gen3_phy_usb2_ops = { + .init = rcar_gen3_phy_usb2_init, + .exit = rcar_gen3_phy_usb2_exit, + .power_on = rcar_gen3_phy_usb2_power_on, + .power_off = rcar_gen3_phy_usb2_power_off, + .owner = THIS_MODULE, +}; + +static const struct phy_ops rz_g1c_phy_usb2_ops = { + .init = rcar_gen3_phy_usb2_init, + .exit = rcar_gen3_phy_usb2_exit, + .owner = THIS_MODULE, +}; + +static const struct rcar_gen3_phy_drv_data rcar_gen3_phy_usb2_data = { + .phy_usb2_ops = &rcar_gen3_phy_usb2_ops, + .no_adp_ctrl = false, + .obint_enable_bits = USB2_OBINT_SESSVLDCHG | + USB2_OBINT_IDDIGCHG, +}; + +static const struct rcar_gen3_phy_drv_data rz_g1c_phy_usb2_data = { + .phy_usb2_ops = &rz_g1c_phy_usb2_ops, + .no_adp_ctrl = false, + .obint_enable_bits = USB2_OBINT_SESSVLDCHG | + USB2_OBINT_IDDIGCHG, +}; + +static const struct rcar_gen3_phy_drv_data rz_g2l_phy_usb2_data = { + .phy_usb2_ops = &rcar_gen3_phy_usb2_ops, + .no_adp_ctrl = true, + .obint_enable_bits = USB2_OBINT_IDCHG_EN, +}; + +static const struct rcar_gen3_phy_drv_data rz_g3s_phy_usb2_data = { + .phy_usb2_ops = &rcar_gen3_phy_usb2_ops, + .no_adp_ctrl = true, + .init_bus = true, + .obint_enable_bits = USB2_OBINT_IDCHG_EN, +}; + +static const struct rcar_gen3_phy_drv_data rz_t2h_phy_usb2_data = { + .phy_usb2_ops = &rcar_gen3_phy_usb2_ops, + .vblvl_ctrl = true, + .obint_enable_bits = USB2_OBINT_IDCHG_EN | USB2_OBINT_VBSTAINT, +}; + +static const struct rcar_gen3_phy_drv_data rz_v2h_phy_usb2_data = { + .phy_usb2_ops = &rcar_gen3_phy_usb2_ops, + .no_adp_ctrl = true, + .utmi_ctrl = true, + .obint_enable_bits = USB2_OBINT_IDCHG_EN, +}; + +static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = { + { + .compatible = "renesas,usb2-phy-r8a77470", + .data = &rz_g1c_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r8a7795", + .data = &rcar_gen3_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r8a7796", + .data = &rcar_gen3_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r8a77965", + .data = &rcar_gen3_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r9a08g045", + .data = &rz_g3s_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r9a08g046", + .data = &rz_g3s_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r9a09g057", + .data = &rz_v2h_phy_usb2_data, + }, + { + .compatible = "renesas,usb2-phy-r9a09g077", + .data = &rz_t2h_phy_usb2_data, + }, + { + .compatible = "renesas,rzg2l-usb2-phy", + .data = &rz_g2l_phy_usb2_data, + }, + { + .compatible = "renesas,rcar-gen3-usb2-phy", + .data = &rcar_gen3_phy_usb2_data, + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table); + +static const unsigned int rcar_gen3_phy_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +static struct phy *rcar_gen3_phy_usb2_xlate(struct device *dev, + const struct of_phandle_args *args) +{ + struct rcar_gen3_chan *ch = dev_get_drvdata(dev); + + if (args->args_count == 0) /* For old version dts */ + return ch->rphys[PHY_INDEX_BOTH_HC].phy; + else if (args->args_count > 1) /* Prevent invalid args count */ + return ERR_PTR(-ENODEV); + + if (args->args[0] >= NUM_OF_PHYS) + return ERR_PTR(-ENODEV); + + return ch->rphys[args->args[0]].phy; +} + +static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np) +{ + enum usb_dr_mode candidate = USB_DR_MODE_UNKNOWN; + int i; + + /* + * If one of device nodes has other dr_mode except UNKNOWN, + * this function returns UNKNOWN. To achieve backward compatibility, + * this loop starts the index as 0. + */ + for (i = 0; i < NUM_OF_PHYS; i++) { + enum usb_dr_mode mode = of_usb_get_dr_mode_by_phy(np, i); + + if (mode != USB_DR_MODE_UNKNOWN) { + if (candidate == USB_DR_MODE_UNKNOWN) + candidate = mode; + else if (candidate != mode) + return USB_DR_MODE_UNKNOWN; + } + } + + return candidate; +} + +static void rcar_gen3_reset_assert(void *data) +{ + reset_control_assert(data); +} + +static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel) +{ + struct device *dev = channel->dev; + int ret; + u32 val; + + if (!channel->phy_data->init_bus) + return 0; + + ret = pm_runtime_resume_and_get(dev); + if (ret) + return ret; + + val = readl(channel->base + USB2_AHB_BUS_CTR); + val &= ~USB2_AHB_BUS_CTR_MBL_MASK; + val |= USB2_AHB_BUS_CTR_MBL_INCR4; + writel(val, channel->base + USB2_AHB_BUS_CTR); + + pm_runtime_put(dev); + + return 0; +} + +static int rcar_gen3_phy_usb2_regulator_endisable(struct regulator_dev *rdev, + bool enable) +{ + struct rcar_gen3_chan *channel = rdev_get_drvdata(rdev); + struct device *dev = channel->dev; + int ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) { + dev_warn(dev, "pm_runtime_get failed: %i\n", ret); + return ret; + } + + rcar_gen3_phy_usb2_set_vbus(channel, USB2_VBCTRL, + USB2_VBCTRL_VBOUT, enable); + pm_runtime_put_noidle(dev); + + return ret; +} + +static int rcar_gen3_phy_usb2_regulator_enable(struct regulator_dev *rdev) +{ + return rcar_gen3_phy_usb2_regulator_endisable(rdev, true); +} + +static int rcar_gen3_phy_usb2_regulator_disable(struct regulator_dev *rdev) +{ + return rcar_gen3_phy_usb2_regulator_endisable(rdev, false); +} + +static int rcar_gen3_phy_usb2_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct rcar_gen3_chan *channel = rdev_get_drvdata(rdev); + void __iomem *usb2_base = channel->base; + struct device *dev = channel->dev; + u32 vbus_ctrl_reg = USB2_VBCTRL; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) { + dev_warn(dev, "pm_runtime_get failed: %i\n", ret); + return ret; + } + + val = readl(usb2_base + vbus_ctrl_reg); + + pm_runtime_put_noidle(dev); + dev_dbg(channel->dev, "%s: %08x\n", __func__, val); + + return (val & USB2_VBCTRL_VBOUT) ? 1 : 0; +} + +static const struct regulator_ops rcar_gen3_phy_usb2_regulator_ops = { + .enable = rcar_gen3_phy_usb2_regulator_enable, + .disable = rcar_gen3_phy_usb2_regulator_disable, + .is_enabled = rcar_gen3_phy_usb2_regulator_is_enabled, +}; + +static const struct regulator_desc rcar_gen3_phy_usb2_regulator = { + .name = "otg-vbus-regulator", + .of_match = of_match_ptr("vbus-regulator"), + .ops = &rcar_gen3_phy_usb2_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .fixed_uV = 5000000, + .n_voltages = 1, +}; + +static void rcar_gen3_phy_usb2_vbus_disable_action(void *data) +{ + struct regulator *vbus = data; + + regulator_disable(vbus); +} + +static int rcar_gen3_phy_usb2_vbus_regulator_get_exclusive_enable(struct rcar_gen3_chan *channel, + bool enable) +{ + struct device *dev = channel->dev; + int ret; + + channel->vbus = devm_regulator_get_exclusive(dev, "vbus"); + if (IS_ERR(channel->vbus)) { + ret = PTR_ERR(channel->vbus); + /* If vbus-regulator node was present vbus regulator should be available */ + if (channel->otg_internal_reg) + return ret; + + if (ret == -EPROBE_DEFER) + return ret; + + return 0; + } + + if (enable) { + ret = regulator_enable(channel->vbus); + if (ret) + return ret; + } + + if (regulator_is_enabled(channel->vbus)) + return devm_add_action_or_reset(dev, rcar_gen3_phy_usb2_vbus_disable_action, + channel->vbus); + + return 0; +} + +static int rcar_gen3_phy_usb2_vbus_regulator_register(struct rcar_gen3_chan *channel) +{ + struct device *dev = channel->dev; + struct regulator_config rcfg = { .dev = dev, }; + struct regulator_dev *rdev; + bool enable = false; + + rcfg.of_node = of_get_available_child_by_name(dev->of_node, + "vbus-regulator"); + if (rcfg.of_node) { + rcfg.driver_data = channel; + rdev = devm_regulator_register(dev, &rcar_gen3_phy_usb2_regulator, + &rcfg); + of_node_put(rcfg.of_node); + if (IS_ERR(rdev)) + return dev_err_probe(dev, PTR_ERR(rdev), + "Failed to create vbus-regulator\n"); + + channel->otg_internal_reg = true; + enable = true; + } + + return rcar_gen3_phy_usb2_vbus_regulator_get_exclusive_enable(channel, enable); +} + +static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rcar_gen3_chan *channel; + struct phy_provider *provider; + struct mux_state *mux_state; + int ret = 0, i, irq; + + if (!dev->of_node) { + dev_err(dev, "This driver needs device tree\n"); + return -EINVAL; + } + + channel = devm_kzalloc(dev, sizeof(*channel), GFP_KERNEL); + if (!channel) + return -ENOMEM; + + channel->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(channel->base)) + return PTR_ERR(channel->base); + + channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node); + if (channel->dr_mode != USB_DR_MODE_UNKNOWN) { + channel->is_otg_channel = true; + channel->uses_otg_pins = !of_property_read_bool(dev->of_node, + "renesas,no-otg-pins"); + channel->extcon = devm_extcon_dev_allocate(dev, + rcar_gen3_phy_cable); + if (IS_ERR(channel->extcon)) + return PTR_ERR(channel->extcon); + + ret = devm_extcon_dev_register(dev, channel->extcon); + if (ret < 0) { + dev_err(dev, "Failed to register extcon\n"); + return ret; + } + } + + channel->rstc = devm_reset_control_array_get_optional_shared(dev); + if (IS_ERR(channel->rstc)) + return PTR_ERR(channel->rstc); + + ret = reset_control_deassert(channel->rstc); + if (ret) + return ret; + + ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert, channel->rstc); + if (ret) + return ret; + + /* + * 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) + return dev_err_probe(dev, ret, "Failed to enable pm_runtime\n"); + + channel->phy_data = of_device_get_match_data(dev); + if (!channel->phy_data) + return -EINVAL; + + platform_set_drvdata(pdev, channel); + channel->dev = dev; + + ret = rcar_gen3_phy_usb2_init_bus(channel); + if (ret) + return ret; + + spin_lock_init(&channel->lock); + for (i = 0; i < NUM_OF_PHYS; i++) { + channel->rphys[i].phy = devm_phy_create(dev, NULL, + channel->phy_data->phy_usb2_ops); + if (IS_ERR(channel->rphys[i].phy)) + return dev_err_probe(dev, PTR_ERR(channel->rphys[i].phy), + "Failed to create USB2 PHY\n"); + + channel->rphys[i].ch = channel; + channel->rphys[i].int_enable_bits = rcar_gen3_int_enable[i]; + phy_set_drvdata(channel->rphys[i].phy, &channel->rphys[i]); + } + + mux_state = devm_mux_state_get_optional_selected(dev, NULL); + if (IS_ERR(mux_state)) + return dev_err_probe(dev, PTR_ERR(mux_state), "Failed to get USB mux\n"); + + if (channel->phy_data->no_adp_ctrl && channel->is_otg_channel) { + ret = rcar_gen3_phy_usb2_vbus_regulator_register(channel); + if (ret) + return ret; + } else { + channel->vbus = devm_regulator_get_optional(dev, "vbus"); + } + if (IS_ERR(channel->vbus)) { + if (PTR_ERR(channel->vbus) == -EPROBE_DEFER) + return PTR_ERR(channel->vbus); + + channel->vbus = NULL; + } + + irq = platform_get_irq_optional(pdev, 0); + if (irq < 0 && irq != -ENXIO) { + return irq; + } else if (irq > 0) { + INIT_WORK(&channel->work, rcar_gen3_phy_usb2_work); + ret = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq, + IRQF_SHARED, dev_name(dev), channel); + if (ret < 0) + return dev_err_probe(dev, ret, + "Failed to request irq (%d)\n", + irq); + } + + provider = devm_of_phy_provider_register(dev, rcar_gen3_phy_usb2_xlate); + if (IS_ERR(provider)) { + return dev_err_probe(dev, PTR_ERR(provider), + "Failed to register PHY provider\n"); + } else if (channel->is_otg_channel) { + ret = device_create_file(dev, &dev_attr_role); + if (ret < 0) + return ret; + } + + return 0; +} + +static void rcar_gen3_phy_usb2_remove(struct platform_device *pdev) +{ + struct rcar_gen3_chan *channel = platform_get_drvdata(pdev); + + if (channel->is_otg_channel) + device_remove_file(&pdev->dev, &dev_attr_role); +} + +static int rcar_gen3_phy_usb2_suspend(struct device *dev) +{ + struct rcar_gen3_chan *channel = dev_get_drvdata(dev); + + return reset_control_assert(channel->rstc); +} + +static int rcar_gen3_phy_usb2_resume(struct device *dev) +{ + struct rcar_gen3_chan *channel = dev_get_drvdata(dev); + int ret; + + ret = reset_control_deassert(channel->rstc); + if (ret) + return ret; + + ret = rcar_gen3_phy_usb2_init_bus(channel); + if (ret) + reset_control_assert(channel->rstc); + + return ret; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(rcar_gen3_phy_usb2_pm_ops, + rcar_gen3_phy_usb2_suspend, + rcar_gen3_phy_usb2_resume); + +static struct platform_driver rcar_gen3_phy_usb2_driver = { + .driver = { + .name = "phy_rcar_gen3_usb2", + .of_match_table = rcar_gen3_phy_usb2_match_table, + .pm = pm_ptr(&rcar_gen3_phy_usb2_pm_ops), + }, + .probe = rcar_gen3_phy_usb2_probe, + .remove = rcar_gen3_phy_usb2_remove, +}; +module_platform_driver(rcar_gen3_phy_usb2_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Renesas R-Car Gen3 USB 2.0 PHY"); +MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>"); diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb3.c b/drivers/phy/renesas/phy-rcar-gen3-usb3.c new file mode 100644 index 000000000..0420f5b28 --- /dev/null +++ b/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>"); diff --git a/drivers/phy/renesas/phy-rzg3e-usb3.c b/drivers/phy/renesas/phy-rzg3e-usb3.c new file mode 100644 index 000000000..060309547 --- /dev/null +++ b/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>"); diff --git a/drivers/phy/renesas/r8a779f0-ether-serdes.c b/drivers/phy/renesas/r8a779f0-ether-serdes.c new file mode 100644 index 000000000..8a6b6f366 --- /dev/null +++ b/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"); |