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phy: Add new Exynos USB 2.0 PHY driver
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 4x10 and 4x12 SoC families. Signed-off-by: Kamil Debski <k.debski@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Kamil Debski
Kishon Vijay Abraham I
parent
b5d682f4eb
commit
06fb01373c
@ -20,3 +20,56 @@ Required properties:
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- compatible : should be "samsung,exynos5250-dp-video-phy";
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- reg : offset and length of the Display Port PHY register set;
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- #phy-cells : from the generic PHY bindings, must be 0;
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Samsung S5P/EXYNOS SoC series USB PHY
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-------------------------------------------------
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Required properties:
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- compatible : should be one of the listed compatibles:
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- "samsung,exynos4210-usb2-phy"
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- "samsung,exynos4x12-usb2-phy"
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- reg : a list of registers used by phy driver
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- first and obligatory is the location of phy modules registers
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- samsung,sysreg-phandle - handle to syscon used to control the system registers
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- samsung,pmureg-phandle - handle to syscon used to control PMU registers
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- #phy-cells : from the generic phy bindings, must be 1;
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- clocks and clock-names:
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- the "phy" clock is required by the phy module, used as a gate
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- the "ref" clock is used to get the rate of the clock provided to the
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PHY module
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The first phandle argument in the PHY specifier identifies the PHY, its
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meaning is compatible dependent. For the currently supported SoCs (Exynos 4210
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and Exynos 4212) it is as follows:
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0 - USB device ("device"),
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1 - USB host ("host"),
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2 - HSIC0 ("hsic0"),
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3 - HSIC1 ("hsic1"),
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Exynos 4210 and Exynos 4212 use mode switching and require that mode switch
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register is supplied.
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Example:
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For Exynos 4412 (compatible with Exynos 4212):
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usbphy: phy@125b0000 {
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compatible = "samsung,exynos4x12-usb2-phy";
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reg = <0x125b0000 0x100>;
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clocks = <&clock 305>, <&clock 2>;
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clock-names = "phy", "ref";
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status = "okay";
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#phy-cells = <1>;
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samsung,sysreg-phandle = <&sys_reg>;
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samsung,pmureg-phandle = <&pmu_reg>;
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};
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Then the PHY can be used in other nodes such as:
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phy-consumer@12340000 {
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phys = <&usbphy 2>;
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phy-names = "phy";
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};
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Refer to DT bindings documentation of particular PHY consumer devices for more
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information about required PHYs and the way of specification.
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135
Documentation/phy/samsung-usb2.txt
Normal file
135
Documentation/phy/samsung-usb2.txt
Normal file
@ -0,0 +1,135 @@
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.------------------------------------------------------------------------------+
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| Samsung USB 2.0 PHY adaptation layer |
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+-----------------------------------------------------------------------------+'
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| 1. Description
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+----------------
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The architecture of the USB 2.0 PHY module in Samsung SoCs is similar
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among many SoCs. In spite of the similarities it proved difficult to
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create a one driver that would fit all these PHY controllers. Often
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the differences were minor and were found in particular bits of the
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registers of the PHY. In some rare cases the order of register writes or
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the PHY powering up process had to be altered. This adaptation layer is
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a compromise between having separate drivers and having a single driver
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with added support for many special cases.
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| 2. Files description
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+----------------------
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- phy-samsung-usb2.c
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This is the main file of the adaptation layer. This file contains
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the probe function and provides two callbacks to the Generic PHY
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Framework. This two callbacks are used to power on and power off the
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phy. They carry out the common work that has to be done on all version
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of the PHY module. Depending on which SoC was chosen they execute SoC
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specific callbacks. The specific SoC version is selected by choosing
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the appropriate compatible string. In addition, this file contains
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struct of_device_id definitions for particular SoCs.
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- phy-samsung-usb2.h
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This is the include file. It declares the structures used by this
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driver. In addition it should contain extern declarations for
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structures that describe particular SoCs.
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| 3. Supporting SoCs
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+--------------------
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To support a new SoC a new file should be added to the drivers/phy
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directory. Each SoC's configuration is stored in an instance of the
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struct samsung_usb2_phy_config.
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struct samsung_usb2_phy_config {
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const struct samsung_usb2_common_phy *phys;
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int (*rate_to_clk)(unsigned long, u32 *);
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unsigned int num_phys;
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bool has_mode_switch;
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};
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The num_phys is the number of phys handled by the driver. *phys is an
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array that contains the configuration for each phy. The has_mode_switch
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property is a boolean flag that determines whether the SoC has USB host
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and device on a single pair of pins. If so, a special register has to
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be modified to change the internal routing of these pins between a USB
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device or host module.
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For example the configuration for Exynos 4210 is following:
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const struct samsung_usb2_phy_config exynos4210_usb2_phy_config = {
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.has_mode_switch = 0,
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.num_phys = EXYNOS4210_NUM_PHYS,
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.phys = exynos4210_phys,
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.rate_to_clk = exynos4210_rate_to_clk,
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}
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- int (*rate_to_clk)(unsigned long, u32 *)
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The rate_to_clk callback is to convert the rate of the clock
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used as the reference clock for the PHY module to the value
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that should be written in the hardware register.
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The exynos4210_phys configuration array is as follows:
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static const struct samsung_usb2_common_phy exynos4210_phys[] = {
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{
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.label = "device",
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.id = EXYNOS4210_DEVICE,
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.power_on = exynos4210_power_on,
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.power_off = exynos4210_power_off,
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},
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{
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.label = "host",
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.id = EXYNOS4210_HOST,
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.power_on = exynos4210_power_on,
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.power_off = exynos4210_power_off,
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},
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{
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.label = "hsic0",
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.id = EXYNOS4210_HSIC0,
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.power_on = exynos4210_power_on,
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.power_off = exynos4210_power_off,
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},
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{
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.label = "hsic1",
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.id = EXYNOS4210_HSIC1,
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.power_on = exynos4210_power_on,
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.power_off = exynos4210_power_off,
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},
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{},
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};
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- int (*power_on)(struct samsung_usb2_phy_instance *);
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- int (*power_off)(struct samsung_usb2_phy_instance *);
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These two callbacks are used to power on and power off the phy
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by modifying appropriate registers.
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Final change to the driver is adding appropriate compatible value to the
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phy-samsung-usb2.c file. In case of Exynos 4210 the following lines were
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added to the struct of_device_id samsung_usb2_phy_of_match[] array:
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#ifdef CONFIG_PHY_EXYNOS4210_USB2
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{
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.compatible = "samsung,exynos4210-usb2-phy",
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.data = &exynos4210_usb2_phy_config,
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},
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#endif
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To add further flexibility to the driver the Kconfig file enables to
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include support for selected SoCs in the compiled driver. The Kconfig
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entry for Exynos 4210 is following:
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config PHY_EXYNOS4210_USB2
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bool "Support for Exynos 4210"
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depends on PHY_SAMSUNG_USB2
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depends on CPU_EXYNOS4210
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help
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Enable USB PHY support for Exynos 4210. This option requires that
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Samsung USB 2.0 PHY driver is enabled and means that support for this
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particular SoC is compiled in the driver. In case of Exynos 4210 four
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phys are available - device, host, HSCI0 and HSCI1.
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The newly created file that supports the new SoC has to be also added to the
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Makefile. In case of Exynos 4210 the added line is following:
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obj-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o
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After completing these steps the support for the new SoC should be ready.
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@ -107,4 +107,33 @@ config PHY_SUN4I_USB
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This driver controls the entire USB PHY block, both the USB OTG
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parts, as well as the 2 regular USB 2 host PHYs.
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config PHY_SAMSUNG_USB2
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tristate "Samsung USB 2.0 PHY driver"
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select GENERIC_PHY
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select MFD_SYSCON
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help
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Enable this to support the Samsung USB 2.0 PHY driver for Samsung
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SoCs. This driver provides the interface for USB 2.0 PHY. Support for
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particular SoCs has to be enabled in addition to this driver. Number
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and type of supported phys depends on the SoC.
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config PHY_EXYNOS4210_USB2
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bool "Support for Exynos 4210"
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depends on PHY_SAMSUNG_USB2
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depends on CPU_EXYNOS4210
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help
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Enable USB PHY support for Exynos 4210. This option requires that
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Samsung USB 2.0 PHY driver is enabled and means that support for this
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particular SoC is compiled in the driver. In case of Exynos 4210 four
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phys are available - device, host, HSIC0 and HSIC1.
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config PHY_EXYNOS4X12_USB2
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bool "Support for Exynos 4x12"
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depends on PHY_SAMSUNG_USB2
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depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412)
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help
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Enable USB PHY support for Exynos 4x12. This option requires that
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Samsung USB 2.0 PHY driver is enabled and means that support for this
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particular SoC is compiled in the driver. In case of Exynos 4x12 four
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phys are available - device, host, HSIC0 and HSIC1.
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endmenu
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@ -12,3 +12,6 @@ obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o
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obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
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obj-$(CONFIG_PHY_EXYNOS5250_SATA) += phy-exynos5250-sata.o
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obj-$(CONFIG_PHY_SUN4I_USB) += phy-sun4i-usb.o
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obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-samsung-usb2.o
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obj-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o
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obj-$(CONFIG_PHY_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o
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261
drivers/phy/phy-exynos4210-usb2.c
Normal file
261
drivers/phy/phy-exynos4210-usb2.c
Normal file
@ -0,0 +1,261 @@
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/*
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* Samsung SoC USB 1.1/2.0 PHY driver - Exynos 4210 support
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*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* Author: Kamil Debski <k.debski@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/phy/phy.h>
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#include <linux/regmap.h>
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#include "phy-samsung-usb2.h"
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/* Exynos USB PHY registers */
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/* PHY power control */
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#define EXYNOS_4210_UPHYPWR 0x0
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#define EXYNOS_4210_UPHYPWR_PHY0_SUSPEND BIT(0)
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#define EXYNOS_4210_UPHYPWR_PHY0_PWR BIT(3)
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#define EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR BIT(4)
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#define EXYNOS_4210_UPHYPWR_PHY0_SLEEP BIT(5)
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#define EXYNOS_4210_UPHYPWR_PHY0 ( \
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EXYNOS_4210_UPHYPWR_PHY0_SUSPEND | \
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EXYNOS_4210_UPHYPWR_PHY0_PWR | \
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EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR | \
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EXYNOS_4210_UPHYPWR_PHY0_SLEEP)
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#define EXYNOS_4210_UPHYPWR_PHY1_SUSPEND BIT(6)
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#define EXYNOS_4210_UPHYPWR_PHY1_PWR BIT(7)
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#define EXYNOS_4210_UPHYPWR_PHY1_SLEEP BIT(8)
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#define EXYNOS_4210_UPHYPWR_PHY1 ( \
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EXYNOS_4210_UPHYPWR_PHY1_SUSPEND | \
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EXYNOS_4210_UPHYPWR_PHY1_PWR | \
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EXYNOS_4210_UPHYPWR_PHY1_SLEEP)
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#define EXYNOS_4210_UPHYPWR_HSIC0_SUSPEND BIT(9)
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#define EXYNOS_4210_UPHYPWR_HSIC0_SLEEP BIT(10)
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#define EXYNOS_4210_UPHYPWR_HSIC0 ( \
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EXYNOS_4210_UPHYPWR_HSIC0_SUSPEND | \
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EXYNOS_4210_UPHYPWR_HSIC0_SLEEP)
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#define EXYNOS_4210_UPHYPWR_HSIC1_SUSPEND BIT(11)
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#define EXYNOS_4210_UPHYPWR_HSIC1_SLEEP BIT(12)
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#define EXYNOS_4210_UPHYPWR_HSIC1 ( \
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EXYNOS_4210_UPHYPWR_HSIC1_SUSPEND | \
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EXYNOS_4210_UPHYPWR_HSIC1_SLEEP)
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/* PHY clock control */
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#define EXYNOS_4210_UPHYCLK 0x4
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#define EXYNOS_4210_UPHYCLK_PHYFSEL_MASK (0x3 << 0)
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#define EXYNOS_4210_UPHYCLK_PHYFSEL_OFFSET 0
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#define EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0)
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#define EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0)
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#define EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
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#define EXYNOS_4210_UPHYCLK_PHY0_ID_PULLUP BIT(2)
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#define EXYNOS_4210_UPHYCLK_PHY0_COMMON_ON BIT(4)
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#define EXYNOS_4210_UPHYCLK_PHY1_COMMON_ON BIT(7)
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/* PHY reset control */
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#define EXYNOS_4210_UPHYRST 0x8
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#define EXYNOS_4210_URSTCON_PHY0 BIT(0)
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#define EXYNOS_4210_URSTCON_OTG_HLINK BIT(1)
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#define EXYNOS_4210_URSTCON_OTG_PHYLINK BIT(2)
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#define EXYNOS_4210_URSTCON_PHY1_ALL BIT(3)
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#define EXYNOS_4210_URSTCON_PHY1_P0 BIT(4)
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#define EXYNOS_4210_URSTCON_PHY1_P1P2 BIT(5)
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#define EXYNOS_4210_URSTCON_HOST_LINK_ALL BIT(6)
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#define EXYNOS_4210_URSTCON_HOST_LINK_P0 BIT(7)
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#define EXYNOS_4210_URSTCON_HOST_LINK_P1 BIT(8)
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#define EXYNOS_4210_URSTCON_HOST_LINK_P2 BIT(9)
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/* Isolation, configured in the power management unit */
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#define EXYNOS_4210_USB_ISOL_DEVICE_OFFSET 0x704
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#define EXYNOS_4210_USB_ISOL_DEVICE BIT(0)
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#define EXYNOS_4210_USB_ISOL_HOST_OFFSET 0x708
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#define EXYNOS_4210_USB_ISOL_HOST BIT(0)
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/* USBYPHY1 Floating prevention */
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#define EXYNOS_4210_UPHY1CON 0x34
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#define EXYNOS_4210_UPHY1CON_FLOAT_PREVENTION 0x1
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/* Mode switching SUB Device <-> Host */
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#define EXYNOS_4210_MODE_SWITCH_OFFSET 0x21c
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#define EXYNOS_4210_MODE_SWITCH_MASK 1
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#define EXYNOS_4210_MODE_SWITCH_DEVICE 0
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#define EXYNOS_4210_MODE_SWITCH_HOST 1
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enum exynos4210_phy_id {
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EXYNOS4210_DEVICE,
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EXYNOS4210_HOST,
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EXYNOS4210_HSIC0,
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EXYNOS4210_HSIC1,
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EXYNOS4210_NUM_PHYS,
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};
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/*
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* exynos4210_rate_to_clk() converts the supplied clock rate to the value that
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* can be written to the phy register.
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*/
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static int exynos4210_rate_to_clk(unsigned long rate, u32 *reg)
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{
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switch (rate) {
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case 12 * MHZ:
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*reg = EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ;
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break;
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case 24 * MHZ:
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*reg = EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ;
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break;
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case 48 * MHZ:
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*reg = EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static void exynos4210_isol(struct samsung_usb2_phy_instance *inst, bool on)
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{
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struct samsung_usb2_phy_driver *drv = inst->drv;
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u32 offset;
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u32 mask;
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switch (inst->cfg->id) {
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case EXYNOS4210_DEVICE:
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offset = EXYNOS_4210_USB_ISOL_DEVICE_OFFSET;
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mask = EXYNOS_4210_USB_ISOL_DEVICE;
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break;
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case EXYNOS4210_HOST:
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offset = EXYNOS_4210_USB_ISOL_HOST_OFFSET;
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mask = EXYNOS_4210_USB_ISOL_HOST;
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break;
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default:
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return;
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};
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regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask);
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}
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static void exynos4210_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
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{
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struct samsung_usb2_phy_driver *drv = inst->drv;
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u32 rstbits = 0;
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u32 phypwr = 0;
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u32 rst;
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u32 pwr;
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u32 clk;
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switch (inst->cfg->id) {
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case EXYNOS4210_DEVICE:
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phypwr = EXYNOS_4210_UPHYPWR_PHY0;
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rstbits = EXYNOS_4210_URSTCON_PHY0;
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||||
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,
|
||||
};
|
||||
328
drivers/phy/phy-exynos4x12-usb2.c
Normal file
328
drivers/phy/phy-exynos4x12-usb2.c
Normal file
@ -0,0 +1,328 @@
|
||||
/*
|
||||
* Samsung SoC USB 1.1/2.0 PHY driver - Exynos 4x12 support
|
||||
*
|
||||
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
|
||||
* Author: Kamil Debski <k.debski@samsung.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,
|
||||
};
|
||||
222
drivers/phy/phy-samsung-usb2.c
Normal file
222
drivers/phy/phy-samsung-usb2.c
Normal file
@ -0,0 +1,222 @@
|
||||
/*
|
||||
* Samsung SoC USB 1.1/2.0 PHY driver
|
||||
*
|
||||
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
|
||||
* Author: Kamil Debski <k.debski@samsung.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@samsung.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:samsung-usb2-phy");
|
||||
66
drivers/phy/phy-samsung-usb2.h
Normal file
66
drivers/phy/phy-samsung-usb2.h
Normal file
@ -0,0 +1,66 @@
|
||||
/*
|
||||
* Samsung SoC USB 1.1/2.0 PHY driver
|
||||
*
|
||||
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
|
||||
* Author: Kamil Debski <k.debski@samsung.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
|
||||
Loading…
Reference in New Issue
Block a user