Hi Sander, > From: Kamil Debski [mailto:k.debski@xxxxxxxxxxx] > 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@xxxxxxxxxxx> 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@xxxxxxxxxxx> 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@125b0000 { > + 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@12340000 { > + 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@xxxxxxxxxxx> > + * > + * 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@xxxxxxxxxxx> > + * > + * 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@xxxxxxxxxxx> > + * > + * 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@xxxxxxxxxxx>"); > +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@xxxxxxxxxxx> > + * > + * 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 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
 |