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Message-id: <187601cf3853$be3f6360$3abe2a20$%debski@samsung.com>
Date: Wed, 05 Mar 2014 10:17:32 +0100
From: Kamil Debski <k.debski@...sung.com>
To: 'Kamil Debski' <k.debski@...sung.com>,
linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
'Sander' <sander@...ilis.net>
Cc: kyungmin.park@...sung.com, kishon@...com, t.figa@...sung.com,
s.nawrocki@...sung.com, m.szyprowski@...sung.com,
gautam.vivek@...sung.com, mat.krawczuk@...il.com,
yulgon.kim@...sung.com, p.paneri@...sung.com,
av.tikhomirov@...sung.com, jg1.han@...sung.com,
galak@...eaurora.org, matt.porter@...aro.org,
tjakobi@...h.uni-bielefeld.de, stern@...land.harvard.edu
Subject: RE: [PATCH v7 3/4] phy: Add new Exynos USB 2.0 PHY driver
Hi Sander,
> From: Kamil Debski [mailto:k.debski@...sung.com]
> Sent: Tuesday, March 04, 2014 4:24 PM
>
> Add a new driver for the Exynos USB 2.0 PHY. The new driver uses the
> generic PHY framework. The driver includes support for the Exynos 4210
> and 4x12 SoC families.
>
> Signed-off-by: Kamil Debski <k.debski@...sung.com>
Sander, you did test the v6 of this patch, thus I am adding your
"Tested-by".
Could you confirm that this version works as well?
Tested-by: Sander Hollaar <sander@...ilis.net>
Best wishes,
--
Kamil Debski
Samsung R&D Institute Poland
> ---
> .../devicetree/bindings/phy/samsung-phy.txt | 53 ++++
> Documentation/phy/samsung-usb2.txt | 134 ++++++++
> drivers/phy/Kconfig | 29 ++
> drivers/phy/Makefile | 3 +
> drivers/phy/phy-exynos4210-usb2.c | 262
> ++++++++++++++++
> drivers/phy/phy-exynos4x12-usb2.c | 330
> ++++++++++++++++++++
> drivers/phy/phy-samsung-usb2.c | 223
> +++++++++++++
> drivers/phy/phy-samsung-usb2.h | 67 ++++
> 8 files changed, 1101 insertions(+)
> create mode 100644 Documentation/phy/samsung-usb2.txt
> create mode 100644 drivers/phy/phy-exynos4210-usb2.c create mode
> 100644 drivers/phy/phy-exynos4x12-usb2.c create mode 100644
> drivers/phy/phy-samsung-usb2.c create mode 100644 drivers/phy/phy-
> samsung-usb2.h
>
> diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt
> b/Documentation/devicetree/bindings/phy/samsung-phy.txt
> index c0fccaa..bf955ab 100644
> --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
> @@ -20,3 +20,56 @@ Required properties:
> - compatible : should be "samsung,exynos5250-dp-video-phy";
> - reg : offset and length of the Display Port PHY register set;
> - #phy-cells : from the generic PHY bindings, must be 0;
> +
> +Samsung S5P/EXYNOS SoC series USB PHY
> +-------------------------------------------------
> +
> +Required properties:
> +- compatible : should be one of the listed compatibles:
> + - "samsung,exynos4210-usb2-phy"
> + - "samsung,exynos4x12-usb2-phy"
> +- reg : a list of registers used by phy driver
> + - first and obligatory is the location of phy modules registers
> +- samsung,sysreg-phandle - handle to syscon used to control the system
> +registers
> +- samsung,pmureg-phandle - handle to syscon used to control PMU
> +registers
> +- #phy-cells : from the generic phy bindings, must be 1;
> +- clocks and clock-names:
> + - the "phy" clock is required by the phy module, used as a gate
> + - the "ref" clock is used to get the rate of the clock provided
> to the
> + PHY module
> +
> +The first phandle argument in the PHY specifier identifies the PHY,
> its
> +meaning is compatible dependent. For the currently supported SoCs
> +(Exynos 4210 and Exynos 4212) it is as follows:
> + 0 - USB device ("device"),
> + 1 - USB host ("host"),
> + 2 - HSIC0 ("hsic0"),
> + 3 - HSIC1 ("hsic1"),
> +
> +Exynos 4210 and Exynos 4212 use mode switching and require that mode
> +switch register is supplied.
> +
> +Example:
> +
> +For Exynos 4412 (compatible with Exynos 4212):
> +
> +usbphy: phy@...b0000 {
> + compatible = "samsung,exynos4x12-usb2-phy";
> + reg = <0x125b0000 0x100>;
> + clocks = <&clock 305>, <&clock 2>;
> + clock-names = "phy", "ref";
> + status = "okay";
> + #phy-cells = <1>;
> + samsung,sysreg-phandle = <&sys_reg>;
> + samsung,pmureg-phandle = <&pmu_reg>;
> +};
> +
> +Then the PHY can be used in other nodes such as:
> +
> +phy-consumer@...40000 {
> + phys = <&usbphy 2>;
> + phy-names = "phy";
> +};
> +
> +Refer to DT bindings documentation of particular PHY consumer devices
> +for more information about required PHYs and the way of specification.
> diff --git a/Documentation/phy/samsung-usb2.txt
> b/Documentation/phy/samsung-usb2.txt
> new file mode 100644
> index 0000000..0c8e260
> --- /dev/null
> +++ b/Documentation/phy/samsung-usb2.txt
> @@ -0,0 +1,134 @@
> +.---------------------------------------------------------------------
> -
> +--------+
> +| Samsung USB 2.0 PHY adaptation layer
> |
> ++---------------------------------------------------------------------
> --------+'
> +
> +| 1. Description
> ++----------------
> +
> +The architecture of the USB 2.0 PHY module in Samsung SoCs is similar
> +among many SoCs. In spite of the similarities it proved difficult to
> +create a one driver that would fit all these PHY controllers. Often
> the
> +differences were minor and were found in particular bits of the
> +registers of the PHY. In some rare cases the order of register writes
> +or the PHY powering up process had to be altered. This adaptation
> layer
> +is a compromise between having separate drivers and having a single
> +driver with added support for many special cases.
> +
> +| 2. Files description
> ++----------------------
> +
> +- phy-samsung-usb2.c
> + This is the main file of the adaptation layer. This file contains
> + the probe function and provides two callbacks to the Generic PHY
> + Framework. This two callbacks are used to power on and power off
> the
> + phy. They carry out the common work that has to be done on all
> version
> + of the PHY module. Depending on which SoC was chosen they execute
> SoC
> + specific callbacks. The specific SoC version is selected by
> choosing
> + the appropriate compatible string. In addition, this file contains
> + struct of_device_id definitions for particular SoCs.
> +
> +- phy-samsung-usb2.h
> + This is the include file. It declares the structures used by this
> + driver. In addition it should contain extern declarations for
> + structures that describe particular SoCs.
> +
> +| 3. Supporting SoCs
> ++--------------------
> +
> +To support a new SoC a new file should be added to the drivers/phy
> +directory. Each SoC's configuration is stored in an instance of the
> +struct samsung_usb2_phy_config.
> +
> +struct samsung_usb2_phy_config {
> + const struct samsung_usb2_common_phy *phys;
> + unsigned int num_phys;
> + bool has_mode_switch;
> +};
> +
> +The num_phys is the number of phys handled by the driver. *phys is an
> +array that contains the configuration for each phy. The
> has_mode_switch
> +property is a boolean flag that determines whether the SoC has USB
> host
> +and device on a single pair of pins. If so, a special register has to
> +be modified to change the internal routing of these pins between a USB
> +device or host module.
> +
> +For example the configuration for Exynos 4210 is following:
> +
> +const struct samsung_usb2_phy_config exynos4210_usb2_phy_config = {
> + .has_mode_switch = 0,
> + .num_phys = EXYNOS4210_NUM_PHYS,
> + .phys = exynos4210_phys,
> + .rate_to_clk = exynos4210_rate_to_clk,
> +}
> +
> +- int (*rate_to_clk)(unsigned long, u32 *)
> + The rate_to_clk callback is to convert the rate of the clock
> + used as the reference clock for the PHY module to the value
> + that should be written in the hardware register.
> +
> +The exynos4210_phys configuration array is as follows:
> +
> +static const struct samsung_usb2_common_phy exynos4210_phys[] = {
> + {
> + .label = "device",
> + .id = EXYNOS4210_DEVICE,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {
> + .label = "host",
> + .id = EXYNOS4210_HOST,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {
> + .label = "hsic0",
> + .id = EXYNOS4210_HSIC0,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {
> + .label = "hsic1",
> + .id = EXYNOS4210_HSIC1,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {},
> +};
> +
> +- int (*power_on)(struct samsung_usb2_phy_instance *);
> +- int (*power_off)(struct samsung_usb2_phy_instance *);
> + These two callbacks are used to power on and power off the phy
> + by modifying appropriate registers.
> +
> +Final change to the driver is adding appropriate compatible value to
> +the phy-samsung-usb2.c file. In case of Exynos 4210 the following
> lines
> +were added to the struct of_device_id samsung_usb2_phy_of_match[]
> array:
> +
> +#ifdef CONFIG_PHY_EXYNOS4210_USB2
> + {
> + .compatible = "samsung,exynos4210-usb2-phy",
> + .data = &exynos4210_usb2_phy_config,
> + },
> +#endif
> +
> +To add further flexibility to the driver the Kconfig file enables to
> +include support for selected SoCs in the compiled driver. The Kconfig
> +entry for Exynos 4210 is following:
> +
> +config PHY_EXYNOS4210_USB2
> + bool "Support for Exynos 4210"
> + depends on PHY_SAMSUNG_USB2
> + depends on CPU_EXYNOS4210
> + help
> + Enable USB PHY support for Exynos 4210. This option requires
> that
> + Samsung USB 2.0 PHY driver is enabled and means that support
> for this
> + particular SoC is compiled in the driver. In case of Exynos
> 4210 four
> + phys are available - device, host, HSCI0 and HSCI1.
> +
> +The newly created file that supports the new SoC has to be also added
> +to the Makefile. In case of Exynos 4210 the added line is following:
> +
> +obj-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o
> +
> +After completing these steps the support for the new SoC should be
> ready.
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index
> c7a551c..1890351 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -65,4 +65,33 @@ config BCM_KONA_USB2_PHY
> help
> Enable this to support the Broadcom Kona USB 2.0 PHY.
>
> +config PHY_SAMSUNG_USB2
> + tristate "Samsung USB 2.0 PHY driver"
> + select GENERIC_PHY
> + select MFD_SYSCON
> + help
> + Enable this to support the Samsung USB 2.0 PHY driver for
> Samsung
> + SoCs. This driver provides the interface for USB 2.0 PHY.
> Support for
> + particular SoCs has to be enabled in addition to this driver.
> Number
> + and type of supported phys depends on the SoC.
> +
> +config PHY_EXYNOS4210_USB2
> + bool "Support for Exynos 4210"
> + depends on PHY_SAMSUNG_USB2
> + depends on CPU_EXYNOS4210
> + help
> + Enable USB PHY support for Exynos 4210. This option requires
> that
> + Samsung USB 2.0 PHY driver is enabled and means that support
> for this
> + particular SoC is compiled in the driver. In case of Exynos
> 4210 four
> + phys are available - device, host, HSIC0 and HSIC1.
> +
> +config PHY_EXYNOS4X12_USB2
> + bool "Support for Exynos 4x12"
> + depends on PHY_SAMSUNG_USB2
> + depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412)
> + help
> + Enable USB PHY support for Exynos 4x12. This option requires
> that
> + Samsung USB 2.0 PHY driver is enabled and means that support
> for this
> + particular SoC is compiled in the driver. In case of Exynos
> 4x12 four
> + phys are available - device, host, HSIC0 and HSIC1.
> endmenu
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index
> b57c253..69d0b3f2 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -9,3 +9,6 @@ obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-
> mipi-video.o
> obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o
> obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
> obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
> +obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-samsung-usb2.o
> +obj-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o
> +obj-$(CONFIG_PHY_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o
> diff --git a/drivers/phy/phy-exynos4210-usb2.c b/drivers/phy/phy-
> exynos4210-usb2.c
> new file mode 100644
> index 0000000..9970e81
> --- /dev/null
> +++ b/drivers/phy/phy-exynos4210-usb2.c
> @@ -0,0 +1,262 @@
> +/*
> + * Samsung SoC USB 1.1/2.0 PHY driver - Exynos 4210 support
> + *
> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
> + * Author: Kamil Debski <k.debski@...sung.com>
> + *
> + * 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/delay.h>
> +#include <linux/io.h>
> +#include <linux/phy/phy.h>
> +#include <linux/regmap.h>
> +#include "phy-samsung-usb2.h"
> +
> +/* Exynos USB PHY registers */
> +
> +/* PHY power control */
> +#define EXYNOS_4210_UPHYPWR 0x0
> +
> +#define EXYNOS_4210_UPHYPWR_PHY0_SUSPEND BIT(0)
> +#define EXYNOS_4210_UPHYPWR_PHY0_PWR BIT(3)
> +#define EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR BIT(4)
> +#define EXYNOS_4210_UPHYPWR_PHY0_SLEEP BIT(5)
> +#define EXYNOS_4210_UPHYPWR_PHY0 ( \
> + EXYNOS_4210_UPHYPWR_PHY0_SUSPEND | \
> + EXYNOS_4210_UPHYPWR_PHY0_PWR | \
> + EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR | \
> + EXYNOS_4210_UPHYPWR_PHY0_SLEEP)
> +
> +#define EXYNOS_4210_UPHYPWR_PHY1_SUSPEND BIT(6)
> +#define EXYNOS_4210_UPHYPWR_PHY1_PWR BIT(7)
> +#define EXYNOS_4210_UPHYPWR_PHY1_SLEEP BIT(8)
> +#define EXYNOS_4210_UPHYPWR_PHY1 ( \
> + EXYNOS_4210_UPHYPWR_PHY1_SUSPEND | \
> + EXYNOS_4210_UPHYPWR_PHY1_PWR | \
> + EXYNOS_4210_UPHYPWR_PHY1_SLEEP)
> +
> +#define EXYNOS_4210_UPHYPWR_HSIC0_SUSPEND BIT(9)
> +#define EXYNOS_4210_UPHYPWR_HSIC0_SLEEP BIT(10)
> +#define EXYNOS_4210_UPHYPWR_HSIC0 ( \
> + EXYNOS_4210_UPHYPWR_HSIC0_SUSPEND | \
> + EXYNOS_4210_UPHYPWR_HSIC0_SLEEP)
> +
> +#define EXYNOS_4210_UPHYPWR_HSIC1_SUSPEND BIT(11)
> +#define EXYNOS_4210_UPHYPWR_HSIC1_SLEEP BIT(12)
> +#define EXYNOS_4210_UPHYPWR_HSIC1 ( \
> + EXYNOS_4210_UPHYPWR_HSIC1_SUSPEND | \
> + EXYNOS_4210_UPHYPWR_HSIC1_SLEEP)
> +
> +/* PHY clock control */
> +#define EXYNOS_4210_UPHYCLK 0x4
> +
> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_MASK (0x3 << 0)
> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_OFFSET 0
> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0)
> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0)
> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
> +
> +#define EXYNOS_4210_UPHYCLK_PHY0_ID_PULLUP BIT(2)
> +#define EXYNOS_4210_UPHYCLK_PHY0_COMMON_ON BIT(4)
> +#define EXYNOS_4210_UPHYCLK_PHY1_COMMON_ON BIT(7)
> +
> +/* PHY reset control */
> +#define EXYNOS_4210_UPHYRST 0x8
> +
> +#define EXYNOS_4210_URSTCON_PHY0 BIT(0)
> +#define EXYNOS_4210_URSTCON_OTG_HLINK BIT(1)
> +#define EXYNOS_4210_URSTCON_OTG_PHYLINK BIT(2)
> +#define EXYNOS_4210_URSTCON_PHY1_ALL BIT(3)
> +#define EXYNOS_4210_URSTCON_PHY1_P0 BIT(4)
> +#define EXYNOS_4210_URSTCON_PHY1_P1P2 BIT(5)
> +#define EXYNOS_4210_URSTCON_HOST_LINK_ALL BIT(6)
> +#define EXYNOS_4210_URSTCON_HOST_LINK_P0 BIT(7)
> +#define EXYNOS_4210_URSTCON_HOST_LINK_P1 BIT(8)
> +#define EXYNOS_4210_URSTCON_HOST_LINK_P2 BIT(9)
> +
> +/* Isolation, configured in the power management unit */
> +#define EXYNOS_4210_USB_ISOL_DEVICE_OFFSET 0x704
> +#define EXYNOS_4210_USB_ISOL_DEVICE BIT(0)
> +#define EXYNOS_4210_USB_ISOL_HOST_OFFSET 0x708
> +#define EXYNOS_4210_USB_ISOL_HOST BIT(0)
> +
> +/* USBYPHY1 Floating prevention */
> +#define EXYNOS_4210_UPHY1CON 0x34
> +#define EXYNOS_4210_UPHY1CON_FLOAT_PREVENTION 0x1
> +
> +/* Mode switching SUB Device <-> Host */
> +#define EXYNOS_4210_MODE_SWITCH_OFFSET 0x21c
> +#define EXYNOS_4210_MODE_SWITCH_MASK 1
> +#define EXYNOS_4210_MODE_SWITCH_DEVICE 0
> +#define EXYNOS_4210_MODE_SWITCH_HOST 1
> +
> +enum exynos4210_phy_id {
> + EXYNOS4210_DEVICE,
> + EXYNOS4210_HOST,
> + EXYNOS4210_HSIC0,
> + EXYNOS4210_HSIC1,
> + EXYNOS4210_NUM_PHYS,
> +};
> +
> +/*
> + * exynos4210_rate_to_clk() converts the supplied clock rate to the
> +value that
> + * can be written to the phy register.
> + */
> +static int exynos4210_rate_to_clk(unsigned long rate, u32 *reg) {
> + switch (rate) {
> + case 12 * MHZ:
> + *reg = EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ;
> + break;
> + case 24 * MHZ:
> + *reg = EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ;
> + break;
> + case 48 * MHZ:
> + *reg = EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static void exynos4210_isol(struct samsung_usb2_phy_instance *inst,
> +bool on) {
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + u32 offset;
> + u32 mask;
> +
> + switch (inst->cfg->id) {
> + case EXYNOS4210_DEVICE:
> + offset = EXYNOS_4210_USB_ISOL_DEVICE_OFFSET;
> + mask = EXYNOS_4210_USB_ISOL_DEVICE;
> + break;
> + case EXYNOS4210_HOST:
> + offset = EXYNOS_4210_USB_ISOL_HOST_OFFSET;
> + mask = EXYNOS_4210_USB_ISOL_HOST;
> + break;
> + default:
> + return;
> + };
> +
> + regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask); }
> +
> +static void exynos4210_phy_pwr(struct samsung_usb2_phy_instance *inst,
> +bool on) {
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + u32 rstbits = 0;
> + u32 phypwr = 0;
> + u32 rst;
> + u32 pwr;
> + u32 clk;
> +
> + switch (inst->cfg->id) {
> + case EXYNOS4210_DEVICE:
> + phypwr = EXYNOS_4210_UPHYPWR_PHY0;
> + rstbits = EXYNOS_4210_URSTCON_PHY0;
> + break;
> + case EXYNOS4210_HOST:
> + phypwr = EXYNOS_4210_UPHYPWR_PHY1;
> + rstbits = EXYNOS_4210_URSTCON_PHY1_ALL |
> + EXYNOS_4210_URSTCON_PHY1_P0 |
> + EXYNOS_4210_URSTCON_PHY1_P1P2 |
> + EXYNOS_4210_URSTCON_HOST_LINK_ALL |
> + EXYNOS_4210_URSTCON_HOST_LINK_P0;
> + writel(on, drv->reg_phy + EXYNOS_4210_UPHY1CON);
> + break;
> + case EXYNOS4210_HSIC0:
> + phypwr = EXYNOS_4210_UPHYPWR_HSIC0;
> + rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 |
> + EXYNOS_4210_URSTCON_HOST_LINK_P1;
> + break;
> + case EXYNOS4210_HSIC1:
> + phypwr = EXYNOS_4210_UPHYPWR_HSIC1;
> + rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 |
> + EXYNOS_4210_URSTCON_HOST_LINK_P2;
> + break;
> + };
> +
> + if (on) {
> + clk = readl(drv->reg_phy + EXYNOS_4210_UPHYCLK);
> + clk &= ~EXYNOS_4210_UPHYCLK_PHYFSEL_MASK;
> + clk |= drv->ref_reg_val <<
> EXYNOS_4210_UPHYCLK_PHYFSEL_OFFSET;
> + writel(clk, drv->reg_phy + EXYNOS_4210_UPHYCLK);
> +
> + pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR);
> + pwr &= ~phypwr;
> + writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR);
> +
> + rst = readl(drv->reg_phy + EXYNOS_4210_UPHYRST);
> + rst |= rstbits;
> + writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST);
> + udelay(10);
> + rst &= ~rstbits;
> + writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST);
> + /* The following delay is necessary for the reset sequence
> to be
> + * completed */
> + udelay(80);
> + } else {
> + pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR);
> + pwr |= phypwr;
> + writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR);
> + }
> +}
> +
> +static int exynos4210_power_on(struct samsung_usb2_phy_instance *inst)
> +{
> + /* Order of initialisation is important - first power then
> isolation */
> + exynos4210_phy_pwr(inst, 1);
> + exynos4210_isol(inst, 0);
> +
> + return 0;
> +}
> +
> +static int exynos4210_power_off(struct samsung_usb2_phy_instance
> *inst)
> +{
> + exynos4210_isol(inst, 1);
> + exynos4210_phy_pwr(inst, 0);
> +
> + return 0;
> +}
> +
> +
> +static const struct samsung_usb2_common_phy exynos4210_phys[] = {
> + {
> + .label = "device",
> + .id = EXYNOS4210_DEVICE,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {
> + .label = "host",
> + .id = EXYNOS4210_HOST,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {
> + .label = "hsic0",
> + .id = EXYNOS4210_HSIC0,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {
> + .label = "hsic1",
> + .id = EXYNOS4210_HSIC1,
> + .power_on = exynos4210_power_on,
> + .power_off = exynos4210_power_off,
> + },
> + {},
> +};
> +
> +const struct samsung_usb2_phy_config exynos4210_usb2_phy_config = {
> + .has_mode_switch = 0,
> + .num_phys = EXYNOS4210_NUM_PHYS,
> + .phys = exynos4210_phys,
> + .rate_to_clk = exynos4210_rate_to_clk,
> +};
> +
> diff --git a/drivers/phy/phy-exynos4x12-usb2.c b/drivers/phy/phy-
> exynos4x12-usb2.c
> new file mode 100644
> index 0000000..e3c05fa
> --- /dev/null
> +++ b/drivers/phy/phy-exynos4x12-usb2.c
> @@ -0,0 +1,330 @@
> +/*
> + * Samsung SoC USB 1.1/2.0 PHY driver - Exynos 4x12 support
> + *
> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
> + * Author: Kamil Debski <k.debski@...sung.com>
> + *
> + * 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/delay.h>
> +#include <linux/io.h>
> +#include <linux/phy/phy.h>
> +#include <linux/regmap.h>
> +#include "phy-samsung-usb2.h"
> +
> +/* Exynos USB PHY registers */
> +
> +/* PHY power control */
> +#define EXYNOS_4x12_UPHYPWR 0x0
> +
> +#define EXYNOS_4x12_UPHYPWR_PHY0_SUSPEND BIT(0)
> +#define EXYNOS_4x12_UPHYPWR_PHY0_PWR BIT(3)
> +#define EXYNOS_4x12_UPHYPWR_PHY0_OTG_PWR BIT(4)
> +#define EXYNOS_4x12_UPHYPWR_PHY0_SLEEP BIT(5)
> +#define EXYNOS_4x12_UPHYPWR_PHY0 ( \
> + EXYNOS_4x12_UPHYPWR_PHY0_SUSPEND | \
> + EXYNOS_4x12_UPHYPWR_PHY0_PWR | \
> + EXYNOS_4x12_UPHYPWR_PHY0_OTG_PWR | \
> + EXYNOS_4x12_UPHYPWR_PHY0_SLEEP)
> +
> +#define EXYNOS_4x12_UPHYPWR_PHY1_SUSPEND BIT(6)
> +#define EXYNOS_4x12_UPHYPWR_PHY1_PWR BIT(7)
> +#define EXYNOS_4x12_UPHYPWR_PHY1_SLEEP BIT(8)
> +#define EXYNOS_4x12_UPHYPWR_PHY1 ( \
> + EXYNOS_4x12_UPHYPWR_PHY1_SUSPEND | \
> + EXYNOS_4x12_UPHYPWR_PHY1_PWR | \
> + EXYNOS_4x12_UPHYPWR_PHY1_SLEEP)
> +
> +#define EXYNOS_4x12_UPHYPWR_HSIC0_SUSPEND BIT(9)
> +#define EXYNOS_4x12_UPHYPWR_HSIC0_PWR BIT(10)
> +#define EXYNOS_4x12_UPHYPWR_HSIC0_SLEEP BIT(11)
> +#define EXYNOS_4x12_UPHYPWR_HSIC0 ( \
> + EXYNOS_4x12_UPHYPWR_HSIC0_SUSPEND | \
> + EXYNOS_4x12_UPHYPWR_HSIC0_PWR | \
> + EXYNOS_4x12_UPHYPWR_HSIC0_SLEEP)
> +
> +#define EXYNOS_4x12_UPHYPWR_HSIC1_SUSPEND BIT(12)
> +#define EXYNOS_4x12_UPHYPWR_HSIC1_PWR BIT(13)
> +#define EXYNOS_4x12_UPHYPWR_HSIC1_SLEEP BIT(14)
> +#define EXYNOS_4x12_UPHYPWR_HSIC1 ( \
> + EXYNOS_4x12_UPHYPWR_HSIC1_SUSPEND | \
> + EXYNOS_4x12_UPHYPWR_HSIC1_PWR | \
> + EXYNOS_4x12_UPHYPWR_HSIC1_SLEEP)
> +
> +/* PHY clock control */
> +#define EXYNOS_4x12_UPHYCLK 0x4
> +
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_MASK (0x7 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_OFFSET 0
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_9MHZ6 (0x0 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_10MHZ (0x1 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_19MHZ2 (0x3 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_20MHZ (0x4 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_24MHZ (0x5 << 0)
> +#define EXYNOS_4x12_UPHYCLK_PHYFSEL_50MHZ (0x7 << 0)
> +
> +#define EXYNOS_4x12_UPHYCLK_PHY0_ID_PULLUP BIT(3)
> +#define EXYNOS_4x12_UPHYCLK_PHY0_COMMON_ON BIT(4)
> +#define EXYNOS_4x12_UPHYCLK_PHY1_COMMON_ON BIT(7)
> +
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_MASK (0x7f << 10)
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_OFFSET 10
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_12MHZ (0x24 << 10)
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_15MHZ (0x1c << 10)
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_16MHZ (0x1a << 10)
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_19MHZ2 (0x15 << 10)
> +#define EXYNOS_4x12_UPHYCLK_HSIC_REFCLK_20MHZ (0x14 << 10)
> +
> +/* PHY reset control */
> +#define EXYNOS_4x12_UPHYRST 0x8
> +
> +#define EXYNOS_4x12_URSTCON_PHY0 BIT(0)
> +#define EXYNOS_4x12_URSTCON_OTG_HLINK BIT(1)
> +#define EXYNOS_4x12_URSTCON_OTG_PHYLINK BIT(2)
> +#define EXYNOS_4x12_URSTCON_HOST_PHY BIT(3)
> +#define EXYNOS_4x12_URSTCON_PHY1 BIT(4)
> +#define EXYNOS_4x12_URSTCON_HSIC0 BIT(5)
> +#define EXYNOS_4x12_URSTCON_HSIC1 BIT(6)
> +#define EXYNOS_4x12_URSTCON_HOST_LINK_ALL BIT(7)
> +#define EXYNOS_4x12_URSTCON_HOST_LINK_P0 BIT(8)
> +#define EXYNOS_4x12_URSTCON_HOST_LINK_P1 BIT(9)
> +#define EXYNOS_4x12_URSTCON_HOST_LINK_P2 BIT(10)
> +
> +/* Isolation, configured in the power management unit */
> +#define EXYNOS_4x12_USB_ISOL_OFFSET 0x704
> +#define EXYNOS_4x12_USB_ISOL_OTG BIT(0)
> +#define EXYNOS_4x12_USB_ISOL_HSIC0_OFFSET 0x708
> +#define EXYNOS_4x12_USB_ISOL_HSIC0 BIT(0)
> +#define EXYNOS_4x12_USB_ISOL_HSIC1_OFFSET 0x70c
> +#define EXYNOS_4x12_USB_ISOL_HSIC1 BIT(0)
> +
> +/* Mode switching SUB Device <-> Host */
> +#define EXYNOS_4x12_MODE_SWITCH_OFFSET 0x21c
> +#define EXYNOS_4x12_MODE_SWITCH_MASK 1
> +#define EXYNOS_4x12_MODE_SWITCH_DEVICE 0
> +#define EXYNOS_4x12_MODE_SWITCH_HOST 1
> +
> +enum exynos4x12_phy_id {
> + EXYNOS4x12_DEVICE,
> + EXYNOS4x12_HOST,
> + EXYNOS4x12_HSIC0,
> + EXYNOS4x12_HSIC1,
> + EXYNOS4x12_NUM_PHYS,
> +};
> +
> +/*
> + * exynos4x12_rate_to_clk() converts the supplied clock rate to the
> +value that
> + * can be written to the phy register.
> + */
> +static int exynos4x12_rate_to_clk(unsigned long rate, u32 *reg) {
> + /* EXYNOS_4x12_UPHYCLK_PHYFSEL_MASK */
> +
> + switch (rate) {
> + case 9600 * KHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_9MHZ6;
> + break;
> + case 10 * MHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_10MHZ;
> + break;
> + case 12 * MHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_12MHZ;
> + break;
> + case 19200 * KHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_19MHZ2;
> + break;
> + case 20 * MHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_20MHZ;
> + break;
> + case 24 * MHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_24MHZ;
> + break;
> + case 50 * MHZ:
> + *reg = EXYNOS_4x12_UPHYCLK_PHYFSEL_50MHZ;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static void exynos4x12_isol(struct samsung_usb2_phy_instance *inst,
> +bool on) {
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + u32 offset;
> + u32 mask;
> +
> + switch (inst->cfg->id) {
> + case EXYNOS4x12_DEVICE:
> + case EXYNOS4x12_HOST:
> + offset = EXYNOS_4x12_USB_ISOL_OFFSET;
> + mask = EXYNOS_4x12_USB_ISOL_OTG;
> + break;
> + case EXYNOS4x12_HSIC0:
> + offset = EXYNOS_4x12_USB_ISOL_HSIC0_OFFSET;
> + mask = EXYNOS_4x12_USB_ISOL_HSIC0;
> + break;
> + case EXYNOS4x12_HSIC1:
> + offset = EXYNOS_4x12_USB_ISOL_HSIC1_OFFSET;
> + mask = EXYNOS_4x12_USB_ISOL_HSIC1;
> + break;
> + default:
> + return;
> + };
> +
> + regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask); }
> +
> +static void exynos4x12_setup_clk(struct samsung_usb2_phy_instance
> +*inst) {
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + u32 clk;
> +
> + clk = readl(drv->reg_phy + EXYNOS_4x12_UPHYCLK);
> + clk &= ~EXYNOS_4x12_UPHYCLK_PHYFSEL_MASK;
> + clk |= drv->ref_reg_val << EXYNOS_4x12_UPHYCLK_PHYFSEL_OFFSET;
> + writel(clk, drv->reg_phy + EXYNOS_4x12_UPHYCLK); }
> +
> +static void exynos4x12_phy_pwr(struct samsung_usb2_phy_instance *inst,
> +bool on) {
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + u32 rstbits = 0;
> + u32 phypwr = 0;
> + u32 rst;
> + u32 pwr;
> + u32 mode = 0;
> + u32 switch_mode = 0;
> +
> + switch (inst->cfg->id) {
> + case EXYNOS4x12_DEVICE:
> + phypwr = EXYNOS_4x12_UPHYPWR_PHY0;
> + rstbits = EXYNOS_4x12_URSTCON_PHY0;
> + mode = EXYNOS_4x12_MODE_SWITCH_DEVICE;
> + switch_mode = 1;
> + break;
> + case EXYNOS4x12_HOST:
> + phypwr = EXYNOS_4x12_UPHYPWR_PHY1;
> + rstbits = EXYNOS_4x12_URSTCON_HOST_PHY;
> + mode = EXYNOS_4x12_MODE_SWITCH_HOST;
> + switch_mode = 1;
> + break;
> + case EXYNOS4x12_HSIC0:
> + phypwr = EXYNOS_4x12_UPHYPWR_HSIC0;
> + rstbits = EXYNOS_4x12_URSTCON_HSIC1 |
> + EXYNOS_4x12_URSTCON_HOST_LINK_P0 |
> + EXYNOS_4x12_URSTCON_HOST_PHY;
> + break;
> + case EXYNOS4x12_HSIC1:
> + phypwr = EXYNOS_4x12_UPHYPWR_HSIC1;
> + rstbits = EXYNOS_4x12_URSTCON_HSIC1 |
> + EXYNOS_4x12_URSTCON_HOST_LINK_P1;
> + break;
> + };
> +
> + if (on) {
> + if (switch_mode)
> + regmap_update_bits(drv->reg_sys,
> + EXYNOS_4x12_MODE_SWITCH_OFFSET,
> + EXYNOS_4x12_MODE_SWITCH_MASK,
> + mode);
> +
> + pwr = readl(drv->reg_phy + EXYNOS_4x12_UPHYPWR);
> + pwr &= ~phypwr;
> + writel(pwr, drv->reg_phy + EXYNOS_4x12_UPHYPWR);
> +
> + rst = readl(drv->reg_phy + EXYNOS_4x12_UPHYRST);
> + rst |= rstbits;
> + writel(rst, drv->reg_phy + EXYNOS_4x12_UPHYRST);
> + udelay(10);
> + rst &= ~rstbits;
> + writel(rst, drv->reg_phy + EXYNOS_4x12_UPHYRST);
> + /* The following delay is necessary for the reset sequence
> to be
> + * completed */
> + udelay(80);
> + } else {
> + pwr = readl(drv->reg_phy + EXYNOS_4x12_UPHYPWR);
> + pwr |= phypwr;
> + writel(pwr, drv->reg_phy + EXYNOS_4x12_UPHYPWR);
> + }
> +}
> +
> +static int exynos4x12_power_on(struct samsung_usb2_phy_instance *inst)
> +{
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> +
> + inst->enabled = 1;
> + exynos4x12_setup_clk(inst);
> + exynos4x12_phy_pwr(inst, 1);
> + exynos4x12_isol(inst, 0);
> +
> + /* Power on the device, as it is necessary for HSIC to work */
> + if (inst->cfg->id == EXYNOS4x12_HSIC0) {
> + struct samsung_usb2_phy_instance *device =
> + &drv->instances[EXYNOS4x12_DEVICE];
> + exynos4x12_phy_pwr(device, 1);
> + exynos4x12_isol(device, 0);
> + }
> +
> + return 0;
> +}
> +
> +static int exynos4x12_power_off(struct samsung_usb2_phy_instance
> *inst)
> +{
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + struct samsung_usb2_phy_instance *device =
> + &drv->instances[EXYNOS4x12_DEVICE];
> +
> + inst->enabled = 0;
> + exynos4x12_isol(inst, 1);
> + exynos4x12_phy_pwr(inst, 0);
> +
> + if (inst->cfg->id == EXYNOS4x12_HSIC0 && !device->enabled) {
> + exynos4x12_isol(device, 1);
> + exynos4x12_phy_pwr(device, 0);
> + }
> +
> + return 0;
> +}
> +
> +
> +static const struct samsung_usb2_common_phy exynos4x12_phys[] = {
> + {
> + .label = "device",
> + .id = EXYNOS4x12_DEVICE,
> + .power_on = exynos4x12_power_on,
> + .power_off = exynos4x12_power_off,
> + },
> + {
> + .label = "host",
> + .id = EXYNOS4x12_HOST,
> + .power_on = exynos4x12_power_on,
> + .power_off = exynos4x12_power_off,
> + },
> + {
> + .label = "hsic0",
> + .id = EXYNOS4x12_HSIC0,
> + .power_on = exynos4x12_power_on,
> + .power_off = exynos4x12_power_off,
> + },
> + {
> + .label = "hsic1",
> + .id = EXYNOS4x12_HSIC1,
> + .power_on = exynos4x12_power_on,
> + .power_off = exynos4x12_power_off,
> + },
> + {},
> +};
> +
> +const struct samsung_usb2_phy_config exynos4x12_usb2_phy_config = {
> + .has_mode_switch = 1,
> + .num_phys = EXYNOS4x12_NUM_PHYS,
> + .phys = exynos4x12_phys,
> + .rate_to_clk = exynos4x12_rate_to_clk,
> +};
> +
> diff --git a/drivers/phy/phy-samsung-usb2.c b/drivers/phy/phy-samsung-
> usb2.c new file mode 100644 index 0000000..57a3b07
> --- /dev/null
> +++ b/drivers/phy/phy-samsung-usb2.c
> @@ -0,0 +1,223 @@
> +/*
> + * Samsung SoC USB 1.1/2.0 PHY driver
> + *
> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
> + * Author: Kamil Debski <k.debski@...sung.com>
> + *
> + * 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/clk.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/spinlock.h>
> +#include "phy-samsung-usb2.h"
> +
> +static int samsung_usb2_phy_power_on(struct phy *phy) {
> + struct samsung_usb2_phy_instance *inst = phy_get_drvdata(phy);
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + int ret;
> +
> + dev_dbg(drv->dev, "Request to power_on \"%s\" usb phy\n",
> + inst->cfg->label);
> + ret = clk_prepare_enable(drv->clk);
> + if (ret)
> + goto err_main_clk;
> + ret = clk_prepare_enable(drv->ref_clk);
> + if (ret)
> + goto err_instance_clk;
> + if (inst->cfg->power_on) {
> + spin_lock(&drv->lock);
> + ret = inst->cfg->power_on(inst);
> + spin_unlock(&drv->lock);
> + }
> +
> + return 0;
> +
> +err_instance_clk:
> + clk_disable_unprepare(drv->clk);
> +err_main_clk:
> + return ret;
> +}
> +
> +static int samsung_usb2_phy_power_off(struct phy *phy) {
> + struct samsung_usb2_phy_instance *inst = phy_get_drvdata(phy);
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + int ret = 0;
> +
> + dev_dbg(drv->dev, "Request to power_off \"%s\" usb phy\n",
> + inst->cfg->label);
> + if (inst->cfg->power_off) {
> + spin_lock(&drv->lock);
> + ret = inst->cfg->power_off(inst);
> + spin_unlock(&drv->lock);
> + }
> + clk_disable_unprepare(drv->ref_clk);
> + clk_disable_unprepare(drv->clk);
> + return ret;
> +}
> +
> +static struct phy_ops samsung_usb2_phy_ops = {
> + .power_on = samsung_usb2_phy_power_on,
> + .power_off = samsung_usb2_phy_power_off,
> + .owner = THIS_MODULE,
> +};
> +
> +static struct phy *samsung_usb2_phy_xlate(struct device *dev,
> + struct of_phandle_args *args)
> +{
> + struct samsung_usb2_phy_driver *drv;
> +
> + drv = dev_get_drvdata(dev);
> + if (!drv)
> + return ERR_PTR(-EINVAL);
> +
> + if (WARN_ON(args->args[0] >= drv->cfg->num_phys))
> + return ERR_PTR(-ENODEV);
> +
> + return drv->instances[args->args[0]].phy;
> +}
> +
> +static const struct of_device_id samsung_usb2_phy_of_match[] = {
> #ifdef
> +CONFIG_PHY_EXYNOS4210_USB2
> + {
> + .compatible = "samsung,exynos4210-usb2-phy",
> + .data = &exynos4210_usb2_phy_config,
> + },
> +#endif
> +#ifdef CONFIG_PHY_EXYNOS4X12_USB2
> + {
> + .compatible = "samsung,exynos4x12-usb2-phy",
> + .data = &exynos4x12_usb2_phy_config,
> + },
> +#endif
> + { },
> +};
> +
> +static int samsung_usb2_phy_probe(struct platform_device *pdev) {
> + const struct of_device_id *match;
> + const struct samsung_usb2_phy_config *cfg;
> + struct device *dev = &pdev->dev;
> + struct phy_provider *phy_provider;
> + struct resource *mem;
> + struct samsung_usb2_phy_driver *drv;
> + int i, ret;
> +
> + if (!pdev->dev.of_node) {
> + dev_err(dev, "This driver is required to be instantiated
> from device tree\n");
> + return -EINVAL;
> + }
> +
> + match = of_match_node(samsung_usb2_phy_of_match, pdev-
> >dev.of_node);
> + if (!match) {
> + dev_err(dev, "of_match_node() failed\n");
> + return -EINVAL;
> + }
> + cfg = match->data;
> +
> + drv = devm_kzalloc(dev, sizeof(struct samsung_usb2_phy_driver) +
> + cfg->num_phys * sizeof(struct samsung_usb2_phy_instance),
> + GFP_KERNEL);
> + if (!drv)
> + return -ENOMEM;
> +
> + dev_set_drvdata(dev, drv);
> + spin_lock_init(&drv->lock);
> +
> + drv->cfg = cfg;
> + drv->dev = dev;
> +
> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + drv->reg_phy = devm_ioremap_resource(dev, mem);
> + if (IS_ERR(drv->reg_phy)) {
> + dev_err(dev, "Failed to map register memory (phy)\n");
> + return PTR_ERR(drv->reg_phy);
> + }
> +
> + drv->reg_pmu = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
> + "samsung,pmureg-phandle");
> + if (IS_ERR(drv->reg_pmu)) {
> + dev_err(dev, "Failed to map PMU registers (via syscon)\n");
> + return PTR_ERR(drv->reg_pmu);
> + }
> +
> + if (drv->cfg->has_mode_switch) {
> + drv->reg_sys = syscon_regmap_lookup_by_phandle(
> + pdev->dev.of_node,
"samsung,sysreg-phandle");
> + if (IS_ERR(drv->reg_sys)) {
> + dev_err(dev, "Failed to map system registers (via
> syscon)\n");
> + return PTR_ERR(drv->reg_sys);
> + }
> + }
> +
> + drv->clk = devm_clk_get(dev, "phy");
> + if (IS_ERR(drv->clk)) {
> + dev_err(dev, "Failed to get clock of phy controller\n");
> + return PTR_ERR(drv->clk);
> + }
> +
> + drv->ref_clk = devm_clk_get(dev, "ref");
> + if (IS_ERR(drv->ref_clk)) {
> + dev_err(dev, "Failed to get reference clock for the phy
> controller\n");
> + return PTR_ERR(drv->ref_clk);
> + }
> +
> + drv->ref_rate = clk_get_rate(drv->ref_clk);
> + if (drv->cfg->rate_to_clk) {
> + ret = drv->cfg->rate_to_clk(drv->ref_rate, &drv-
> >ref_reg_val);
> + if (ret)
> + return ret;
> + }
> +
> + for (i = 0; i < drv->cfg->num_phys; i++) {
> + char *label = drv->cfg->phys[i].label;
> + struct samsung_usb2_phy_instance *p = &drv->instances[i];
> +
> + dev_dbg(dev, "Creating phy \"%s\"\n", label);
> + p->phy = devm_phy_create(dev, &samsung_usb2_phy_ops, NULL);
> + if (IS_ERR(p->phy)) {
> + dev_err(drv->dev, "Failed to create usb2_phy
> \"%s\"\n",
> + label);
> + return PTR_ERR(p->phy);
> + }
> +
> + p->cfg = &drv->cfg->phys[i];
> + p->drv = drv;
> + phy_set_bus_width(p->phy, 8);
> + phy_set_drvdata(p->phy, p);
> + }
> +
> + phy_provider = devm_of_phy_provider_register(dev,
> +
samsung_usb2_phy_xlate);
> + if (IS_ERR(phy_provider)) {
> + dev_err(drv->dev, "Failed to register phy provider\n");
> + return PTR_ERR(phy_provider);
> + }
> +
> + return 0;
> +}
> +
> +static struct platform_driver samsung_usb2_phy_driver = {
> + .probe = samsung_usb2_phy_probe,
> + .driver = {
> + .of_match_table = samsung_usb2_phy_of_match,
> + .name = "samsung-usb2-phy",
> + .owner = THIS_MODULE,
> + }
> +};
> +
> +module_platform_driver(samsung_usb2_phy_driver);
> +MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC USB PHY driver");
> +MODULE_AUTHOR("Kamil Debski <k.debski@...sung.com>");
> +MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:samsung-usb2-phy");
> +
> diff --git a/drivers/phy/phy-samsung-usb2.h b/drivers/phy/phy-samsung-
> usb2.h new file mode 100644 index 0000000..c004e90
> --- /dev/null
> +++ b/drivers/phy/phy-samsung-usb2.h
> @@ -0,0 +1,67 @@
> +/*
> + * Samsung SoC USB 1.1/2.0 PHY driver
> + *
> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
> + * Author: Kamil Debski <k.debski@...sung.com>
> + *
> + * 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.
> + */
> +
> +#ifndef _PHY_EXYNOS_USB2_H
> +#define _PHY_EXYNOS_USB2_H
> +
> +#include <linux/clk.h>
> +#include <linux/phy/phy.h>
> +#include <linux/device.h>
> +#include <linux/regmap.h>
> +#include <linux/spinlock.h>
> +
> +#define KHZ 1000
> +#define MHZ (KHZ * KHZ)
> +
> +struct samsung_usb2_phy_driver;
> +struct samsung_usb2_phy_instance;
> +struct samsung_usb2_phy_config;
> +
> +struct samsung_usb2_phy_instance {
> + const struct samsung_usb2_common_phy *cfg;
> + struct phy *phy;
> + struct samsung_usb2_phy_driver *drv;
> + bool enabled;
> +};
> +
> +struct samsung_usb2_phy_driver {
> + const struct samsung_usb2_phy_config *cfg;
> + struct clk *clk;
> + struct clk *ref_clk;
> + unsigned long ref_rate;
> + u32 ref_reg_val;
> + struct device *dev;
> + void __iomem *reg_phy;
> + struct regmap *reg_pmu;
> + struct regmap *reg_sys;
> + spinlock_t lock;
> + struct samsung_usb2_phy_instance instances[0]; };
> +
> +struct samsung_usb2_common_phy {
> + int (*power_on)(struct samsung_usb2_phy_instance *);
> + int (*power_off)(struct samsung_usb2_phy_instance *);
> + unsigned int id;
> + char *label;
> +};
> +
> +
> +struct samsung_usb2_phy_config {
> + const struct samsung_usb2_common_phy *phys;
> + int (*rate_to_clk)(unsigned long, u32 *);
> + unsigned int num_phys;
> + bool has_mode_switch;
> +};
> +
> +extern const struct samsung_usb2_phy_config
> exynos4210_usb2_phy_config;
> +extern const struct samsung_usb2_phy_config
> exynos4x12_usb2_phy_config;
> +#endif
> +
> --
> 1.7.9.5
--
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