| Message ID | 1448847873-7072-2-git-send-email-yoshihiro.shimoda.uh@renesas.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
On Mon, Nov 30, 2015 at 10:44:30AM +0900, Yoshihiro Shimoda wrote: > This patch adds support for R-Car generation 3 USB2 PHY driver. > This SoC has 3 EHCI/OHCI channels, and the channel 0 is shared > with the HSUSB (USB2.0 peripheral) device. And each channel has > independent registers about the PHYs. > > So, the purpose of this driver is: > 1) initializes some registers of SoC specific to use the > {ehci,ohci}-platform driver. > > 2) detects id pin to select host or peripheral on the channel 0. > > For now, this driver only supports 1) above. > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> > --- > .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt | 37 ++++ For the binding: Acked-by: Rob Herring <robh@kernel.org> > drivers/phy/Kconfig | 7 + > drivers/phy/Makefile | 1 + > drivers/phy/phy-rcar-gen3-usb2.c | 217 +++++++++++++++++++++ > 4 files changed, 262 insertions(+) > create mode 100644 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt > create mode 100644 drivers/phy/phy-rcar-gen3-usb2.c > > diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt > new file mode 100644 > index 0000000..affa0f7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt > @@ -0,0 +1,37 @@ > +* Renesas R-Car generation 3 USB 2.0 PHY > + > +This file provides information on what the device node for the R-Car generation > +3 USB 2.0 PHY contains. > + > +Required properties: > +- compatible: "renesas,usb2-phy-r8a7795" if the device is a part of an R8A7795 > + SoC. > +- reg: offset and length of the partial USB 2.0 Host register block. > +- reg-names: must be "usb2_host". > +- clocks: clock phandle and specifier pair(s). > +- #phy-cells: see phy-bindings.txt in the same directory, must be <0>. > + > +Optional properties: > +To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are > +combined, the device tree node should set HSUSB properties to reg and reg-names > +properties. This is because HSUSB has registers to select USB 2.0 host or > +peripheral at that channel: > +- reg: offset and length of the partial HSUSB register block. > +- reg-names: must be "hsusb". > + > +Example (R-Car H3): > + > + usb-phy@ee080200 { > + compatible = "renesas,usb2-phy-r8a7795"; > + reg = <0 0xee080200 0 0x700>, <0 0xe6590100 0 0x100>; > + reg-names = "usb2_host", "hsusb"; > + clocks = <&mstp7_clks R8A7795_CLK_EHCI0>, > + <&mstp7_clks R8A7795_CLK_HSUSB>; > + }; > + > + usb-phy@ee0a0200 { > + compatible = "renesas,usb2-phy-r8a7795"; > + reg = <0 0xee0a0200 0 0x700>; > + reg-names = "usb2_host"; > + clocks = <&mstp7_clks R8A7795_CLK_EHCI0>; > + }; > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index 7eb5859d..e9ab088 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -118,6 +118,13 @@ config PHY_RCAR_GEN2 > help > Support for USB PHY found on Renesas R-Car generation 2 SoCs. > > +config PHY_RCAR_GEN3_USB2 > + tristate "Renesas R-Car generation 3 USB 2.0 PHY driver" > + depends on OF && ARCH_SHMOBILE > + select GENERIC_PHY > + help > + Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs. > + > config OMAP_CONTROL_PHY > tristate "OMAP CONTROL PHY Driver" > depends on ARCH_OMAP2PLUS || COMPILE_TEST > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > index 075db1a..91d7a62 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -17,6 +17,7 @@ obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o > obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o > obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o > obj-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o > +obj-$(CONFIG_PHY_RCAR_GEN3_USB2) += phy-rcar-gen3-usb2.o > obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o > obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o > obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o > diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c > new file mode 100644 > index 0000000..2696152 > --- /dev/null > +++ b/drivers/phy/phy-rcar-gen3-usb2.c > @@ -0,0 +1,217 @@ > +/* > + * Renesas R-Car Gen3 for USB2.0 PHY driver > + * > + * Copyright (C) 2015 Renesas Electronics Corporation > + * > + * This is based on the phy-rcar-gen2 driver: > + * Copyright (C) 2014 Renesas Solutions Corp. > + * Copyright (C) 2014 Cogent Embedded, Inc. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_address.h> > +#include <linux/phy/phy.h> > +#include <linux/platform_device.h> > + > +/******* USB2.0 Host registers (original offset is +0x200) *******/ > +#define USB2_INT_ENABLE 0x000 > +#define USB2_USBCTR 0x00c > +#define USB2_SPD_RSM_TIMSET 0x10c > +#define USB2_OC_TIMSET 0x110 > + > +/* INT_ENABLE */ > +#define USB2_INT_ENABLE_USBH_INTB_EN BIT(2) > +#define USB2_INT_ENABLE_USBH_INTA_EN BIT(1) > +#define USB2_INT_ENABLE_INIT (USB2_INT_ENABLE_USBH_INTB_EN | \ > + USB2_INT_ENABLE_USBH_INTA_EN) > + > +/* USBCTR */ > +#define USB2_USBCTR_DIRPD BIT(2) > +#define USB2_USBCTR_PLL_RST BIT(1) > + > +/* SPD_RSM_TIMSET */ > +#define USB2_SPD_RSM_TIMSET_INIT 0x014e029b > + > +/* OC_TIMSET */ > +#define USB2_OC_TIMSET_INIT 0x000209ab > + > +/******* HSUSB registers (original offset is +0x100) *******/ > +#define HSUSB_LPSTS 0x02 > +#define HSUSB_UGCTRL2 0x84 > + > +/* Low Power Status register (LPSTS) */ > +#define HSUSB_LPSTS_SUSPM 0x4000 > + > +/* USB General control register 2 (UGCTRL2) */ > +#define HSUSB_UGCTRL2_MASK 0x00000031 /* bit[31:6] should be 0 */ > +#define HSUSB_UGCTRL2_USB0SEL 0x00000030 > +#define HSUSB_UGCTRL2_USB0SEL_HOST 0x00000010 > +#define HSUSB_UGCTRL2_USB0SEL_HS_USB 0x00000020 > +#define HSUSB_UGCTRL2_USB0SEL_OTG 0x00000030 > + > +struct rcar_gen3_data { > + void __iomem *base; > + struct clk *clk; > +}; > + > +struct rcar_gen3_chan { > + struct rcar_gen3_data usb2; > + struct rcar_gen3_data hsusb; > + struct phy *phy; > +}; > + > +static int rcar_gen3_phy_usb2_init(struct phy *p) > +{ > + struct rcar_gen3_chan *channel = phy_get_drvdata(p); > + void __iomem *usb2_base = channel->usb2.base; > + void __iomem *hsusb_base = channel->hsusb.base; > + u32 val; > + > + /* Initialize USB2 part */ > + writel(USB2_INT_ENABLE_INIT, usb2_base + USB2_INT_ENABLE); > + writel(USB2_SPD_RSM_TIMSET_INIT, usb2_base + USB2_SPD_RSM_TIMSET); > + writel(USB2_OC_TIMSET_INIT, usb2_base + USB2_OC_TIMSET); > + > + /* Initialize HSUSB part */ > + if (hsusb_base) { > + /* TODO: support "OTG" mode */ > + val = readl(hsusb_base + HSUSB_UGCTRL2); > + val = (val & ~HSUSB_UGCTRL2_USB0SEL) | > + HSUSB_UGCTRL2_USB0SEL_HOST; > + writel(val & HSUSB_UGCTRL2_MASK, hsusb_base + HSUSB_UGCTRL2); > + } > + > + return 0; > +} > + > +static int rcar_gen3_phy_usb2_exit(struct phy *p) > +{ > + struct rcar_gen3_chan *channel = phy_get_drvdata(p); > + > + writel(0, channel->usb2.base + USB2_INT_ENABLE); > + > + return 0; > +} > + > +static int rcar_gen3_phy_usb2_power_on(struct phy *p) > +{ > + struct rcar_gen3_chan *channel = phy_get_drvdata(p); > + void __iomem *usb2_base = channel->usb2.base; > + void __iomem *hsusb_base = channel->hsusb.base; > + u32 val; > + > + 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); > + > + /* > + * TODO: To reduce power consuming, this driver should set the SUSPM > + * after the PHY detects ID pin as peripheral. > + */ > + if (hsusb_base) { > + /* Power on HSUSB PHY */ > + val = readw(hsusb_base + HSUSB_LPSTS); > + val |= HSUSB_LPSTS_SUSPM; > + writew(val, hsusb_base + HSUSB_LPSTS); > + } > + > + return 0; > +} > + > +static int rcar_gen3_phy_usb2_power_off(struct phy *p) > +{ > + struct rcar_gen3_chan *channel = phy_get_drvdata(p); > + void __iomem *hsusb_base = channel->hsusb.base; > + u32 val; > + > + if (hsusb_base) { > + /* Power off HSUSB PHY */ > + val = readw(hsusb_base + HSUSB_LPSTS); > + val &= ~HSUSB_LPSTS_SUSPM; > + writew(val, hsusb_base + HSUSB_LPSTS); > + } > + > + return 0; > +} > + > +static 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 of_device_id rcar_gen3_phy_usb2_match_table[] = { > + { .compatible = "renesas,usb2-phy-r8a7795" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table); > + > +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 resource *res; > + > + 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; > + > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "usb2_host"); > + channel->usb2.base = devm_ioremap_resource(dev, res); > + if (IS_ERR(channel->usb2.base)) > + return PTR_ERR(channel->usb2.base); > + > + /* "hsusb" memory resource is optional */ > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hsusb"); > + > + /* To avoid error message by devm_ioremap_resource() */ > + if (res) { > + channel->hsusb.base = devm_ioremap_resource(dev, res); > + if (IS_ERR(channel->hsusb.base)) > + channel->hsusb.base = NULL; > + } > + > + /* devm_phy_create() will call pm_runtime_enable(dev); */ > + channel->phy = devm_phy_create(dev, NULL, &rcar_gen3_phy_usb2_ops); > + if (IS_ERR(channel->phy)) { > + dev_err(dev, "Failed to create USB2 PHY\n"); > + return PTR_ERR(channel->phy); > + } > + > + phy_set_drvdata(channel->phy, channel); > + > + provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); > + if (IS_ERR(provider)) > + dev_err(dev, "Failed to register PHY provider\n"); > + > + return PTR_ERR_OR_ZERO(provider); > +} > + > +static struct platform_driver rcar_gen3_phy_usb2_driver = { > + .driver = { > + .name = "phy_rcar_gen3_usb2", > + .of_match_table = rcar_gen3_phy_usb2_match_table, > + }, > + .probe = rcar_gen3_phy_usb2_probe, > +}; > +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>"); > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt new file mode 100644 index 0000000..affa0f7 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt @@ -0,0 +1,37 @@ +* Renesas R-Car generation 3 USB 2.0 PHY + +This file provides information on what the device node for the R-Car generation +3 USB 2.0 PHY contains. + +Required properties: +- compatible: "renesas,usb2-phy-r8a7795" if the device is a part of an R8A7795 + SoC. +- reg: offset and length of the partial USB 2.0 Host register block. +- reg-names: must be "usb2_host". +- clocks: clock phandle and specifier pair(s). +- #phy-cells: see phy-bindings.txt in the same directory, must be <0>. + +Optional properties: +To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are +combined, the device tree node should set HSUSB properties to reg and reg-names +properties. This is because HSUSB has registers to select USB 2.0 host or +peripheral at that channel: +- reg: offset and length of the partial HSUSB register block. +- reg-names: must be "hsusb". + +Example (R-Car H3): + + usb-phy@ee080200 { + compatible = "renesas,usb2-phy-r8a7795"; + reg = <0 0xee080200 0 0x700>, <0 0xe6590100 0 0x100>; + reg-names = "usb2_host", "hsusb"; + clocks = <&mstp7_clks R8A7795_CLK_EHCI0>, + <&mstp7_clks R8A7795_CLK_HSUSB>; + }; + + usb-phy@ee0a0200 { + compatible = "renesas,usb2-phy-r8a7795"; + reg = <0 0xee0a0200 0 0x700>; + reg-names = "usb2_host"; + clocks = <&mstp7_clks R8A7795_CLK_EHCI0>; + }; diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 7eb5859d..e9ab088 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -118,6 +118,13 @@ config PHY_RCAR_GEN2 help Support for USB PHY found on Renesas R-Car generation 2 SoCs. +config PHY_RCAR_GEN3_USB2 + tristate "Renesas R-Car generation 3 USB 2.0 PHY driver" + depends on OF && ARCH_SHMOBILE + select GENERIC_PHY + help + Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs. + config OMAP_CONTROL_PHY tristate "OMAP CONTROL PHY Driver" depends on ARCH_OMAP2PLUS || COMPILE_TEST diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 075db1a..91d7a62 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o obj-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o +obj-$(CONFIG_PHY_RCAR_GEN3_USB2) += phy-rcar-gen3-usb2.o obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c new file mode 100644 index 0000000..2696152 --- /dev/null +++ b/drivers/phy/phy-rcar-gen3-usb2.c @@ -0,0 +1,217 @@ +/* + * Renesas R-Car Gen3 for USB2.0 PHY driver + * + * Copyright (C) 2015 Renesas Electronics Corporation + * + * This is based on the phy-rcar-gen2 driver: + * Copyright (C) 2014 Renesas Solutions Corp. + * Copyright (C) 2014 Cogent Embedded, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> + +/******* USB2.0 Host registers (original offset is +0x200) *******/ +#define USB2_INT_ENABLE 0x000 +#define USB2_USBCTR 0x00c +#define USB2_SPD_RSM_TIMSET 0x10c +#define USB2_OC_TIMSET 0x110 + +/* INT_ENABLE */ +#define USB2_INT_ENABLE_USBH_INTB_EN BIT(2) +#define USB2_INT_ENABLE_USBH_INTA_EN BIT(1) +#define USB2_INT_ENABLE_INIT (USB2_INT_ENABLE_USBH_INTB_EN | \ + USB2_INT_ENABLE_USBH_INTA_EN) + +/* USBCTR */ +#define USB2_USBCTR_DIRPD BIT(2) +#define USB2_USBCTR_PLL_RST BIT(1) + +/* SPD_RSM_TIMSET */ +#define USB2_SPD_RSM_TIMSET_INIT 0x014e029b + +/* OC_TIMSET */ +#define USB2_OC_TIMSET_INIT 0x000209ab + +/******* HSUSB registers (original offset is +0x100) *******/ +#define HSUSB_LPSTS 0x02 +#define HSUSB_UGCTRL2 0x84 + +/* Low Power Status register (LPSTS) */ +#define HSUSB_LPSTS_SUSPM 0x4000 + +/* USB General control register 2 (UGCTRL2) */ +#define HSUSB_UGCTRL2_MASK 0x00000031 /* bit[31:6] should be 0 */ +#define HSUSB_UGCTRL2_USB0SEL 0x00000030 +#define HSUSB_UGCTRL2_USB0SEL_HOST 0x00000010 +#define HSUSB_UGCTRL2_USB0SEL_HS_USB 0x00000020 +#define HSUSB_UGCTRL2_USB0SEL_OTG 0x00000030 + +struct rcar_gen3_data { + void __iomem *base; + struct clk *clk; +}; + +struct rcar_gen3_chan { + struct rcar_gen3_data usb2; + struct rcar_gen3_data hsusb; + struct phy *phy; +}; + +static int rcar_gen3_phy_usb2_init(struct phy *p) +{ + struct rcar_gen3_chan *channel = phy_get_drvdata(p); + void __iomem *usb2_base = channel->usb2.base; + void __iomem *hsusb_base = channel->hsusb.base; + u32 val; + + /* Initialize USB2 part */ + writel(USB2_INT_ENABLE_INIT, usb2_base + USB2_INT_ENABLE); + writel(USB2_SPD_RSM_TIMSET_INIT, usb2_base + USB2_SPD_RSM_TIMSET); + writel(USB2_OC_TIMSET_INIT, usb2_base + USB2_OC_TIMSET); + + /* Initialize HSUSB part */ + if (hsusb_base) { + /* TODO: support "OTG" mode */ + val = readl(hsusb_base + HSUSB_UGCTRL2); + val = (val & ~HSUSB_UGCTRL2_USB0SEL) | + HSUSB_UGCTRL2_USB0SEL_HOST; + writel(val & HSUSB_UGCTRL2_MASK, hsusb_base + HSUSB_UGCTRL2); + } + + return 0; +} + +static int rcar_gen3_phy_usb2_exit(struct phy *p) +{ + struct rcar_gen3_chan *channel = phy_get_drvdata(p); + + writel(0, channel->usb2.base + USB2_INT_ENABLE); + + return 0; +} + +static int rcar_gen3_phy_usb2_power_on(struct phy *p) +{ + struct rcar_gen3_chan *channel = phy_get_drvdata(p); + void __iomem *usb2_base = channel->usb2.base; + void __iomem *hsusb_base = channel->hsusb.base; + u32 val; + + 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); + + /* + * TODO: To reduce power consuming, this driver should set the SUSPM + * after the PHY detects ID pin as peripheral. + */ + if (hsusb_base) { + /* Power on HSUSB PHY */ + val = readw(hsusb_base + HSUSB_LPSTS); + val |= HSUSB_LPSTS_SUSPM; + writew(val, hsusb_base + HSUSB_LPSTS); + } + + return 0; +} + +static int rcar_gen3_phy_usb2_power_off(struct phy *p) +{ + struct rcar_gen3_chan *channel = phy_get_drvdata(p); + void __iomem *hsusb_base = channel->hsusb.base; + u32 val; + + if (hsusb_base) { + /* Power off HSUSB PHY */ + val = readw(hsusb_base + HSUSB_LPSTS); + val &= ~HSUSB_LPSTS_SUSPM; + writew(val, hsusb_base + HSUSB_LPSTS); + } + + return 0; +} + +static 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 of_device_id rcar_gen3_phy_usb2_match_table[] = { + { .compatible = "renesas,usb2-phy-r8a7795" }, + { } +}; +MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table); + +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 resource *res; + + 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; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "usb2_host"); + channel->usb2.base = devm_ioremap_resource(dev, res); + if (IS_ERR(channel->usb2.base)) + return PTR_ERR(channel->usb2.base); + + /* "hsusb" memory resource is optional */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hsusb"); + + /* To avoid error message by devm_ioremap_resource() */ + if (res) { + channel->hsusb.base = devm_ioremap_resource(dev, res); + if (IS_ERR(channel->hsusb.base)) + channel->hsusb.base = NULL; + } + + /* devm_phy_create() will call pm_runtime_enable(dev); */ + channel->phy = devm_phy_create(dev, NULL, &rcar_gen3_phy_usb2_ops); + if (IS_ERR(channel->phy)) { + dev_err(dev, "Failed to create USB2 PHY\n"); + return PTR_ERR(channel->phy); + } + + phy_set_drvdata(channel->phy, channel); + + provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(provider)) + dev_err(dev, "Failed to register PHY provider\n"); + + return PTR_ERR_OR_ZERO(provider); +} + +static struct platform_driver rcar_gen3_phy_usb2_driver = { + .driver = { + .name = "phy_rcar_gen3_usb2", + .of_match_table = rcar_gen3_phy_usb2_match_table, + }, + .probe = rcar_gen3_phy_usb2_probe, +}; +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>");
This patch adds support for R-Car generation 3 USB2 PHY driver. This SoC has 3 EHCI/OHCI channels, and the channel 0 is shared with the HSUSB (USB2.0 peripheral) device. And each channel has independent registers about the PHYs. So, the purpose of this driver is: 1) initializes some registers of SoC specific to use the {ehci,ohci}-platform driver. 2) detects id pin to select host or peripheral on the channel 0. For now, this driver only supports 1) above. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> --- .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt | 37 ++++ drivers/phy/Kconfig | 7 + drivers/phy/Makefile | 1 + drivers/phy/phy-rcar-gen3-usb2.c | 217 +++++++++++++++++++++ 4 files changed, 262 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt create mode 100644 drivers/phy/phy-rcar-gen3-usb2.c