[PATCH v7 1/2] usb: phy: samsung: Common out the generic stuff
From: Vivek Gautam
Date: Thu Mar 14 2013 - 06:31:26 EST
Moving register and structure definitions to header file,
and keeping the generic functions to be used across
multiple PHYs in common phy helper driver under SAMSUNG_USBPHY,
and moving USB 2.0 PHY driver under SAMSUNG_USB2PHY.
Also allowing samsung PHY drivers be built as modules.
Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Acked-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
.../devicetree/bindings/usb/samsung-usbphy.txt | 22 +-
drivers/usb/phy/Kconfig | 15 +-
drivers/usb/phy/Makefile | 1 +
drivers/usb/phy/phy-samsung-usb.c | 726 +-------------------
drivers/usb/phy/phy-samsung-usb.h | 247 +++++++
drivers/usb/phy/phy-samsung-usb2.c | 509 ++++++++++++++
6 files changed, 800 insertions(+), 720 deletions(-)
create mode 100644 drivers/usb/phy/phy-samsung-usb.h
create mode 100644 drivers/usb/phy/phy-samsung-usb2.c
diff --git a/Documentation/devicetree/bindings/usb/samsung-usbphy.txt b/Documentation/devicetree/bindings/usb/samsung-usbphy.txt
index 0331949..96940ab 100644
--- a/Documentation/devicetree/bindings/usb/samsung-usbphy.txt
+++ b/Documentation/devicetree/bindings/usb/samsung-usbphy.txt
@@ -1,20 +1,25 @@
-* Samsung's usb phy transceiver
+SAMSUNG USB-PHY controllers
-The Samsung's phy transceiver is used for controlling usb phy for
-s3c-hsotg as well as ehci-s5p and ohci-exynos usb controllers
-across Samsung SOCs.
+** Samsung's usb 2.0 phy transceiver
+
+The Samsung's usb 2.0 phy transceiver is used for controlling
+usb 2.0 phy for s3c-hsotg as well as ehci-s5p and ohci-exynos
+usb controllers across Samsung SOCs.
TODO: Adding the PHY binding with controller(s) according to the under
developement generic PHY driver.
Required properties:
Exynos4210:
-- compatible : should be "samsung,exynos4210-usbphy"
+- compatible : should be "samsung,exynos4210-usb2phy"
- reg : base physical address of the phy registers and length of memory mapped
region.
+- clocks: Clock IDs array as required by the controller.
+- clock-names: names of clock correseponding IDs clock property as requested
+ by the controller driver.
Exynos5250:
-- compatible : should be "samsung,exynos5250-usbphy"
+- compatible : should be "samsung,exynos5250-usb2phy"
- reg : base physical address of the phy registers and length of memory mapped
region.
@@ -44,10 +49,13 @@ Example:
usbphy@125B0000 {
#address-cells = <1>;
#size-cells = <1>;
- compatible = "samsung,exynos4210-usbphy";
+ compatible = "samsung,exynos4210-usb2phy";
reg = <0x125B0000 0x100>;
ranges;
+ clocks = <&clock 2>, <&clock 305>;
+ clock-names = "xusbxti", "otg";
+
usbphy-sys {
/* USB device and host PHY_CONTROL registers */
reg = <0x10020704 0x8>;
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 97de6de..e8cd52a 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -86,11 +86,18 @@ config OMAP_USB3
on/off the PHY.
config SAMSUNG_USBPHY
- bool "Samsung USB PHY controller Driver"
- depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS
+ tristate "Samsung USB PHY Driver"
help
- Enable this to support Samsung USB phy controller for samsung
- SoCs.
+ Enable this to support Samsung USB phy helper driver for Samsung SoCs.
+ This driver provides common interface to interact, for Samsung USB 2.0 PHY
+ driver and later for Samsung USB 3.0 PHY driver.
+
+config SAMSUNG_USB2PHY
+ tristate "Samsung USB 2.0 PHY controller Driver"
+ select SAMSUNG_USBPHY
+ help
+ Enable this to support Samsung USB 2.0 (High Speed) PHY controller
+ driver for Samsung SoCs.
config TWL4030_USB
tristate "TWL4030 USB Transceiver Driver"
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index 5fb4a5d..8cd355f 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_OMAP_CONTROL_USB) += phy-omap-control.o
obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
obj-$(CONFIG_OMAP_USB3) += phy-omap-usb3.o
obj-$(CONFIG_SAMSUNG_USBPHY) += phy-samsung-usb.o
+obj-$(CONFIG_SAMSUNG_USB2PHY) += phy-samsung-usb2.o
obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
obj-$(CONFIG_TWL6030_USB) += phy-twl6030-usb.o
obj-$(CONFIG_USB_EHCI_TEGRA) += phy-tegra-usb.o
diff --git a/drivers/usb/phy/phy-samsung-usb.c b/drivers/usb/phy/phy-samsung-usb.c
index 967101e..7b118ee5 100644
--- a/drivers/usb/phy/phy-samsung-usb.c
+++ b/drivers/usb/phy/phy-samsung-usb.c
@@ -1,12 +1,13 @@
-/* linux/drivers/usb/phy/samsung-usbphy.c
+/* linux/drivers/usb/phy/phy-samsung-usb.c
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Praveen Paneri <p.paneri@xxxxxxxxxxx>
*
- * Samsung USB2.0 PHY transceiver; talks to S3C HS OTG controller, EHCI-S5P and
- * OHCI-EXYNOS controllers.
+ * Samsung USB-PHY helper driver with common function calls;
+ * interacts with Samsung USB 2.0 PHY controller driver and later
+ * with Samsung USB 3.0 PHY driver.
*
* 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
@@ -21,233 +22,16 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
-#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
-#include <linux/usb/otg.h>
#include <linux/usb/samsung_usb_phy.h>
-#include <linux/platform_data/samsung-usbphy.h>
-/* Register definitions */
+#include "phy-samsung-usb.h"
-#define SAMSUNG_PHYPWR (0x00)
-
-#define PHYPWR_NORMAL_MASK (0x19 << 0)
-#define PHYPWR_OTG_DISABLE (0x1 << 4)
-#define PHYPWR_ANALOG_POWERDOWN (0x1 << 3)
-#define PHYPWR_FORCE_SUSPEND (0x1 << 1)
-/* For Exynos4 */
-#define PHYPWR_NORMAL_MASK_PHY0 (0x39 << 0)
-#define PHYPWR_SLEEP_PHY0 (0x1 << 5)
-
-#define SAMSUNG_PHYCLK (0x04)
-
-#define PHYCLK_MODE_USB11 (0x1 << 6)
-#define PHYCLK_EXT_OSC (0x1 << 5)
-#define PHYCLK_COMMON_ON_N (0x1 << 4)
-#define PHYCLK_ID_PULL (0x1 << 2)
-#define PHYCLK_CLKSEL_MASK (0x3 << 0)
-#define PHYCLK_CLKSEL_48M (0x0 << 0)
-#define PHYCLK_CLKSEL_12M (0x2 << 0)
-#define PHYCLK_CLKSEL_24M (0x3 << 0)
-
-#define SAMSUNG_RSTCON (0x08)
-
-#define RSTCON_PHYLINK_SWRST (0x1 << 2)
-#define RSTCON_HLINK_SWRST (0x1 << 1)
-#define RSTCON_SWRST (0x1 << 0)
-
-/* EXYNOS5 */
-#define EXYNOS5_PHY_HOST_CTRL0 (0x00)
-
-#define HOST_CTRL0_PHYSWRSTALL (0x1 << 31)
-
-#define HOST_CTRL0_REFCLKSEL_MASK (0x3 << 19)
-#define HOST_CTRL0_REFCLKSEL_XTAL (0x0 << 19)
-#define HOST_CTRL0_REFCLKSEL_EXTL (0x1 << 19)
-#define HOST_CTRL0_REFCLKSEL_CLKCORE (0x2 << 19)
-
-#define HOST_CTRL0_FSEL_MASK (0x7 << 16)
-#define HOST_CTRL0_FSEL(_x) ((_x) << 16)
-
-#define FSEL_CLKSEL_50M (0x7)
-#define FSEL_CLKSEL_24M (0x5)
-#define FSEL_CLKSEL_20M (0x4)
-#define FSEL_CLKSEL_19200K (0x3)
-#define FSEL_CLKSEL_12M (0x2)
-#define FSEL_CLKSEL_10M (0x1)
-#define FSEL_CLKSEL_9600K (0x0)
-
-#define HOST_CTRL0_TESTBURNIN (0x1 << 11)
-#define HOST_CTRL0_RETENABLE (0x1 << 10)
-#define HOST_CTRL0_COMMONON_N (0x1 << 9)
-#define HOST_CTRL0_SIDDQ (0x1 << 6)
-#define HOST_CTRL0_FORCESLEEP (0x1 << 5)
-#define HOST_CTRL0_FORCESUSPEND (0x1 << 4)
-#define HOST_CTRL0_WORDINTERFACE (0x1 << 3)
-#define HOST_CTRL0_UTMISWRST (0x1 << 2)
-#define HOST_CTRL0_LINKSWRST (0x1 << 1)
-#define HOST_CTRL0_PHYSWRST (0x1 << 0)
-
-#define EXYNOS5_PHY_HOST_TUNE0 (0x04)
-
-#define EXYNOS5_PHY_HSIC_CTRL1 (0x10)
-
-#define EXYNOS5_PHY_HSIC_TUNE1 (0x14)
-
-#define EXYNOS5_PHY_HSIC_CTRL2 (0x20)
-
-#define EXYNOS5_PHY_HSIC_TUNE2 (0x24)
-
-#define HSIC_CTRL_REFCLKSEL_MASK (0x3 << 23)
-#define HSIC_CTRL_REFCLKSEL (0x2 << 23)
-
-#define HSIC_CTRL_REFCLKDIV_MASK (0x7f << 16)
-#define HSIC_CTRL_REFCLKDIV(_x) ((_x) << 16)
-#define HSIC_CTRL_REFCLKDIV_12 (0x24 << 16)
-#define HSIC_CTRL_REFCLKDIV_15 (0x1c << 16)
-#define HSIC_CTRL_REFCLKDIV_16 (0x1a << 16)
-#define HSIC_CTRL_REFCLKDIV_19_2 (0x15 << 16)
-#define HSIC_CTRL_REFCLKDIV_20 (0x14 << 16)
-
-#define HSIC_CTRL_SIDDQ (0x1 << 6)
-#define HSIC_CTRL_FORCESLEEP (0x1 << 5)
-#define HSIC_CTRL_FORCESUSPEND (0x1 << 4)
-#define HSIC_CTRL_WORDINTERFACE (0x1 << 3)
-#define HSIC_CTRL_UTMISWRST (0x1 << 2)
-#define HSIC_CTRL_PHYSWRST (0x1 << 0)
-
-#define EXYNOS5_PHY_HOST_EHCICTRL (0x30)
-
-#define HOST_EHCICTRL_ENAINCRXALIGN (0x1 << 29)
-#define HOST_EHCICTRL_ENAINCR4 (0x1 << 28)
-#define HOST_EHCICTRL_ENAINCR8 (0x1 << 27)
-#define HOST_EHCICTRL_ENAINCR16 (0x1 << 26)
-
-#define EXYNOS5_PHY_HOST_OHCICTRL (0x34)
-
-#define HOST_OHCICTRL_SUSPLGCY (0x1 << 3)
-#define HOST_OHCICTRL_APPSTARTCLK (0x1 << 2)
-#define HOST_OHCICTRL_CNTSEL (0x1 << 1)
-#define HOST_OHCICTRL_CLKCKTRST (0x1 << 0)
-
-#define EXYNOS5_PHY_OTG_SYS (0x38)
-
-#define OTG_SYS_PHYLINK_SWRESET (0x1 << 14)
-#define OTG_SYS_LINKSWRST_UOTG (0x1 << 13)
-#define OTG_SYS_PHY0_SWRST (0x1 << 12)
-
-#define OTG_SYS_REFCLKSEL_MASK (0x3 << 9)
-#define OTG_SYS_REFCLKSEL_XTAL (0x0 << 9)
-#define OTG_SYS_REFCLKSEL_EXTL (0x1 << 9)
-#define OTG_SYS_REFCLKSEL_CLKCORE (0x2 << 9)
-
-#define OTG_SYS_IDPULLUP_UOTG (0x1 << 8)
-#define OTG_SYS_COMMON_ON (0x1 << 7)
-
-#define OTG_SYS_FSEL_MASK (0x7 << 4)
-#define OTG_SYS_FSEL(_x) ((_x) << 4)
-
-#define OTG_SYS_FORCESLEEP (0x1 << 3)
-#define OTG_SYS_OTGDISABLE (0x1 << 2)
-#define OTG_SYS_SIDDQ_UOTG (0x1 << 1)
-#define OTG_SYS_FORCESUSPEND (0x1 << 0)
-
-#define EXYNOS5_PHY_OTG_TUNE (0x40)
-
-#ifndef MHZ
-#define MHZ (1000*1000)
-#endif
-
-#ifndef KHZ
-#define KHZ (1000)
-#endif
-
-#define EXYNOS_USBHOST_PHY_CTRL_OFFSET (0x4)
-#define S3C64XX_USBPHY_ENABLE (0x1 << 16)
-#define EXYNOS_USBPHY_ENABLE (0x1 << 0)
-#define EXYNOS_USB20PHY_CFG_HOST_LINK (0x1 << 0)
-
-enum samsung_cpu_type {
- TYPE_S3C64XX,
- TYPE_EXYNOS4210,
- TYPE_EXYNOS5250,
-};
-
-/*
- * struct samsung_usbphy_drvdata - driver data for various SoC variants
- * @cpu_type: machine identifier
- * @devphy_en_mask: device phy enable mask for PHY CONTROL register
- * @hostphy_en_mask: host phy enable mask for PHY CONTROL register
- * @devphy_reg_offset: offset to DEVICE PHY CONTROL register from
- * mapped address of system controller.
- * @hostphy_reg_offset: offset to HOST PHY CONTROL register from
- * mapped address of system controller.
- *
- * Here we have a separate mask for device type phy.
- * Having different masks for host and device type phy helps
- * in setting independent masks in case of SoCs like S5PV210,
- * in which PHY0 and PHY1 enable bits belong to same register
- * placed at position 0 and 1 respectively.
- * Although for newer SoCs like exynos these bits belong to
- * different registers altogether placed at position 0.
- */
-struct samsung_usbphy_drvdata {
- int cpu_type;
- int devphy_en_mask;
- int hostphy_en_mask;
- u32 devphy_reg_offset;
- u32 hostphy_reg_offset;
-};
-
-/*
- * struct samsung_usbphy - transceiver driver state
- * @phy: transceiver structure
- * @plat: platform data
- * @dev: The parent device supplied to the probe function
- * @clk: usb phy clock
- * @regs: usb phy controller registers memory base
- * @pmuregs: USB device PHY_CONTROL register memory base
- * @sysreg: USB2.0 PHY_CFG register memory base
- * @ref_clk_freq: reference clock frequency selection
- * @drv_data: driver data available for different SoCs
- * @phy_type: Samsung SoCs specific phy types: #HOST
- * #DEVICE
- * @phy_usage: usage count for phy
- * @lock: lock for phy operations
- */
-struct samsung_usbphy {
- struct usb_phy phy;
- struct samsung_usbphy_data *plat;
- struct device *dev;
- struct clk *clk;
- void __iomem *regs;
- void __iomem *pmuregs;
- void __iomem *sysreg;
- int ref_clk_freq;
- const struct samsung_usbphy_drvdata *drv_data;
- enum samsung_usb_phy_type phy_type;
- atomic_t phy_usage;
- spinlock_t lock;
-};
-
-#define phy_to_sphy(x) container_of((x), struct samsung_usbphy, phy)
-
-int samsung_usbphy_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- if (!otg)
- return -ENODEV;
-
- if (!otg->host)
- otg->host = host;
-
- return 0;
-}
-
-static int samsung_usbphy_parse_dt(struct samsung_usbphy *sphy)
+int samsung_usbphy_parse_dt(struct samsung_usbphy *sphy)
{
struct device_node *usbphy_sys;
@@ -282,13 +66,14 @@ err0:
of_node_put(usbphy_sys);
return -ENXIO;
}
+EXPORT_SYMBOL_GPL(samsung_usbphy_parse_dt);
/*
* Set isolation here for phy.
* Here 'on = true' would mean USB PHY block is isolated, hence
* de-activated and vice-versa.
*/
-static void samsung_usbphy_set_isolation(struct samsung_usbphy *sphy, bool on)
+void samsung_usbphy_set_isolation(struct samsung_usbphy *sphy, bool on)
{
void __iomem *reg = NULL;
u32 reg_val;
@@ -336,11 +121,12 @@ static void samsung_usbphy_set_isolation(struct samsung_usbphy *sphy, bool on)
writel(reg_val, reg);
}
+EXPORT_SYMBOL_GPL(samsung_usbphy_set_isolation);
/*
* Configure the mode of working of usb-phy here: HOST/DEVICE.
*/
-static void samsung_usbphy_cfg_sel(struct samsung_usbphy *sphy)
+void samsung_usbphy_cfg_sel(struct samsung_usbphy *sphy)
{
u32 reg;
@@ -358,13 +144,14 @@ static void samsung_usbphy_cfg_sel(struct samsung_usbphy *sphy)
writel(reg, sphy->sysreg);
}
+EXPORT_SYMBOL_GPL(samsung_usbphy_cfg_sel);
/*
* PHYs are different for USB Device and USB Host.
* This make sure that correct PHY type is selected before
* any operation on PHY.
*/
-static int samsung_usbphy_set_type(struct usb_phy *phy,
+int samsung_usbphy_set_type(struct usb_phy *phy,
enum samsung_usb_phy_type phy_type)
{
struct samsung_usbphy *sphy = phy_to_sphy(phy);
@@ -373,11 +160,12 @@ static int samsung_usbphy_set_type(struct usb_phy *phy,
return 0;
}
+EXPORT_SYMBOL_GPL(samsung_usbphy_set_type);
/*
* Returns reference clock frequency selection value
*/
-static int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy)
+int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy)
{
struct clk *ref_clk;
int refclk_freq = 0;
@@ -387,9 +175,9 @@ static int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy)
* external crystal clock XXTI
*/
if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
- ref_clk = clk_get(sphy->dev, "ext_xtal");
+ ref_clk = devm_clk_get(sphy->dev, "ext_xtal");
else
- ref_clk = clk_get(sphy->dev, "xusbxti");
+ ref_clk = devm_clk_get(sphy->dev, "xusbxti");
if (IS_ERR(ref_clk)) {
dev_err(sphy->dev, "Failed to get reference clock\n");
return PTR_ERR(ref_clk);
@@ -445,484 +233,4 @@ static int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy)
return refclk_freq;
}
-
-static bool exynos5_phyhost_is_on(void *regs)
-{
- u32 reg;
-
- reg = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
-
- return !(reg & HOST_CTRL0_SIDDQ);
-}
-
-static void samsung_exynos5_usbphy_enable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phyclk = sphy->ref_clk_freq;
- u32 phyhost;
- u32 phyotg;
- u32 phyhsic;
- u32 ehcictrl;
- u32 ohcictrl;
-
- /*
- * phy_usage helps in keeping usage count for phy
- * so that the first consumer enabling the phy is also
- * the last consumer to disable it.
- */
-
- atomic_inc(&sphy->phy_usage);
-
- if (exynos5_phyhost_is_on(regs)) {
- dev_info(sphy->dev, "Already power on PHY\n");
- return;
- }
-
- /* Host configuration */
- phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
-
- /* phy reference clock configuration */
- phyhost &= ~HOST_CTRL0_FSEL_MASK;
- phyhost |= HOST_CTRL0_FSEL(phyclk);
-
- /* host phy reset */
- phyhost &= ~(HOST_CTRL0_PHYSWRST |
- HOST_CTRL0_PHYSWRSTALL |
- HOST_CTRL0_SIDDQ |
- /* Enable normal mode of operation */
- HOST_CTRL0_FORCESUSPEND |
- HOST_CTRL0_FORCESLEEP);
-
- /* Link reset */
- phyhost |= (HOST_CTRL0_LINKSWRST |
- HOST_CTRL0_UTMISWRST |
- /* COMMON Block configuration during suspend */
- HOST_CTRL0_COMMONON_N);
- writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
- udelay(10);
- phyhost &= ~(HOST_CTRL0_LINKSWRST |
- HOST_CTRL0_UTMISWRST);
- writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
-
- /* OTG configuration */
- phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS);
-
- /* phy reference clock configuration */
- phyotg &= ~OTG_SYS_FSEL_MASK;
- phyotg |= OTG_SYS_FSEL(phyclk);
-
- /* Enable normal mode of operation */
- phyotg &= ~(OTG_SYS_FORCESUSPEND |
- OTG_SYS_SIDDQ_UOTG |
- OTG_SYS_FORCESLEEP |
- OTG_SYS_REFCLKSEL_MASK |
- /* COMMON Block configuration during suspend */
- OTG_SYS_COMMON_ON);
-
- /* OTG phy & link reset */
- phyotg |= (OTG_SYS_PHY0_SWRST |
- OTG_SYS_LINKSWRST_UOTG |
- OTG_SYS_PHYLINK_SWRESET |
- OTG_SYS_OTGDISABLE |
- /* Set phy refclk */
- OTG_SYS_REFCLKSEL_CLKCORE);
-
- writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
- udelay(10);
- phyotg &= ~(OTG_SYS_PHY0_SWRST |
- OTG_SYS_LINKSWRST_UOTG |
- OTG_SYS_PHYLINK_SWRESET);
- writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
-
- /* HSIC phy configuration */
- phyhsic = (HSIC_CTRL_REFCLKDIV_12 |
- HSIC_CTRL_REFCLKSEL |
- HSIC_CTRL_PHYSWRST);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
- udelay(10);
- phyhsic &= ~HSIC_CTRL_PHYSWRST;
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
-
- udelay(80);
-
- /* enable EHCI DMA burst */
- ehcictrl = readl(regs + EXYNOS5_PHY_HOST_EHCICTRL);
- ehcictrl |= (HOST_EHCICTRL_ENAINCRXALIGN |
- HOST_EHCICTRL_ENAINCR4 |
- HOST_EHCICTRL_ENAINCR8 |
- HOST_EHCICTRL_ENAINCR16);
- writel(ehcictrl, regs + EXYNOS5_PHY_HOST_EHCICTRL);
-
- /* set ohci_suspend_on_n */
- ohcictrl = readl(regs + EXYNOS5_PHY_HOST_OHCICTRL);
- ohcictrl |= HOST_OHCICTRL_SUSPLGCY;
- writel(ohcictrl, regs + EXYNOS5_PHY_HOST_OHCICTRL);
-}
-
-static void samsung_usbphy_enable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phypwr;
- u32 phyclk;
- u32 rstcon;
-
- /* set clock frequency for PLL */
- phyclk = sphy->ref_clk_freq;
- phypwr = readl(regs + SAMSUNG_PHYPWR);
- rstcon = readl(regs + SAMSUNG_RSTCON);
-
- switch (sphy->drv_data->cpu_type) {
- case TYPE_S3C64XX:
- phyclk &= ~PHYCLK_COMMON_ON_N;
- phypwr &= ~PHYPWR_NORMAL_MASK;
- rstcon |= RSTCON_SWRST;
- break;
- case TYPE_EXYNOS4210:
- phypwr &= ~PHYPWR_NORMAL_MASK_PHY0;
- rstcon |= RSTCON_SWRST;
- default:
- break;
- }
-
- writel(phyclk, regs + SAMSUNG_PHYCLK);
- /* Configure PHY0 for normal operation*/
- writel(phypwr, regs + SAMSUNG_PHYPWR);
- /* reset all ports of PHY and Link */
- writel(rstcon, regs + SAMSUNG_RSTCON);
- udelay(10);
- rstcon &= ~RSTCON_SWRST;
- writel(rstcon, regs + SAMSUNG_RSTCON);
-}
-
-static void samsung_exynos5_usbphy_disable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phyhost;
- u32 phyotg;
- u32 phyhsic;
-
- if (atomic_dec_return(&sphy->phy_usage) > 0) {
- dev_info(sphy->dev, "still being used\n");
- return;
- }
-
- phyhsic = (HSIC_CTRL_REFCLKDIV_12 |
- HSIC_CTRL_REFCLKSEL |
- HSIC_CTRL_SIDDQ |
- HSIC_CTRL_FORCESLEEP |
- HSIC_CTRL_FORCESUSPEND);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
-
- phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
- phyhost |= (HOST_CTRL0_SIDDQ |
- HOST_CTRL0_FORCESUSPEND |
- HOST_CTRL0_FORCESLEEP |
- HOST_CTRL0_PHYSWRST |
- HOST_CTRL0_PHYSWRSTALL);
- writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
-
- phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS);
- phyotg |= (OTG_SYS_FORCESUSPEND |
- OTG_SYS_SIDDQ_UOTG |
- OTG_SYS_FORCESLEEP);
- writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
-}
-
-static void samsung_usbphy_disable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phypwr;
-
- phypwr = readl(regs + SAMSUNG_PHYPWR);
-
- switch (sphy->drv_data->cpu_type) {
- case TYPE_S3C64XX:
- phypwr |= PHYPWR_NORMAL_MASK;
- break;
- case TYPE_EXYNOS4210:
- phypwr |= PHYPWR_NORMAL_MASK_PHY0;
- default:
- break;
- }
-
- /* Disable analog and otg block power */
- writel(phypwr, regs + SAMSUNG_PHYPWR);
-}
-
-/*
- * The function passed to the usb driver for phy initialization
- */
-static int samsung_usbphy_init(struct usb_phy *phy)
-{
- struct samsung_usbphy *sphy;
- struct usb_bus *host = NULL;
- unsigned long flags;
- int ret = 0;
-
- sphy = phy_to_sphy(phy);
-
- host = phy->otg->host;
-
- /* Enable the phy clock */
- ret = clk_prepare_enable(sphy->clk);
- if (ret) {
- dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
- return ret;
- }
-
- spin_lock_irqsave(&sphy->lock, flags);
-
- if (host) {
- /* setting default phy-type for USB 2.0 */
- if (!strstr(dev_name(host->controller), "ehci") ||
- !strstr(dev_name(host->controller), "ohci"))
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST);
- } else {
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
- }
-
- /* Disable phy isolation */
- if (sphy->plat && sphy->plat->pmu_isolation)
- sphy->plat->pmu_isolation(false);
- else
- samsung_usbphy_set_isolation(sphy, false);
-
- /* Selecting Host/OTG mode; After reset USB2.0PHY_CFG: HOST */
- samsung_usbphy_cfg_sel(sphy);
-
- /* Initialize usb phy registers */
- if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
- samsung_exynos5_usbphy_enable(sphy);
- else
- samsung_usbphy_enable(sphy);
-
- spin_unlock_irqrestore(&sphy->lock, flags);
-
- /* Disable the phy clock */
- clk_disable_unprepare(sphy->clk);
-
- return ret;
-}
-
-/*
- * The function passed to the usb driver for phy shutdown
- */
-static void samsung_usbphy_shutdown(struct usb_phy *phy)
-{
- struct samsung_usbphy *sphy;
- struct usb_bus *host = NULL;
- unsigned long flags;
-
- sphy = phy_to_sphy(phy);
-
- host = phy->otg->host;
-
- if (clk_prepare_enable(sphy->clk)) {
- dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
- return;
- }
-
- spin_lock_irqsave(&sphy->lock, flags);
-
- if (host) {
- /* setting default phy-type for USB 2.0 */
- if (!strstr(dev_name(host->controller), "ehci") ||
- !strstr(dev_name(host->controller), "ohci"))
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST);
- } else {
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
- }
-
- /* De-initialize usb phy registers */
- if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
- samsung_exynos5_usbphy_disable(sphy);
- else
- samsung_usbphy_disable(sphy);
-
- /* Enable phy isolation */
- if (sphy->plat && sphy->plat->pmu_isolation)
- sphy->plat->pmu_isolation(true);
- else
- samsung_usbphy_set_isolation(sphy, true);
-
- spin_unlock_irqrestore(&sphy->lock, flags);
-
- clk_disable_unprepare(sphy->clk);
-}
-
-static const struct of_device_id samsung_usbphy_dt_match[];
-
-static inline const struct samsung_usbphy_drvdata
-*samsung_usbphy_get_driver_data(struct platform_device *pdev)
-{
- if (pdev->dev.of_node) {
- const struct of_device_id *match;
- match = of_match_node(samsung_usbphy_dt_match,
- pdev->dev.of_node);
- return match->data;
- }
-
- return (struct samsung_usbphy_drvdata *)
- platform_get_device_id(pdev)->driver_data;
-}
-
-static int samsung_usbphy_probe(struct platform_device *pdev)
-{
- struct samsung_usbphy *sphy;
- struct usb_otg *otg;
- struct samsung_usbphy_data *pdata = pdev->dev.platform_data;
- const struct samsung_usbphy_drvdata *drv_data;
- struct device *dev = &pdev->dev;
- struct resource *phy_mem;
- void __iomem *phy_base;
- struct clk *clk;
- int ret;
-
- phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!phy_mem) {
- dev_err(dev, "%s: missing mem resource\n", __func__);
- return -ENODEV;
- }
-
- phy_base = devm_ioremap_resource(dev, phy_mem);
- if (IS_ERR(phy_base))
- return PTR_ERR(phy_base);
-
- sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL);
- if (!sphy)
- return -ENOMEM;
-
- otg = devm_kzalloc(dev, sizeof(*otg), GFP_KERNEL);
- if (!otg)
- return -ENOMEM;
-
- drv_data = samsung_usbphy_get_driver_data(pdev);
-
- if (drv_data->cpu_type == TYPE_EXYNOS5250)
- clk = devm_clk_get(dev, "usbhost");
- else
- clk = devm_clk_get(dev, "otg");
-
- if (IS_ERR(clk)) {
- dev_err(dev, "Failed to get otg clock\n");
- return PTR_ERR(clk);
- }
-
- sphy->dev = dev;
-
- if (dev->of_node) {
- ret = samsung_usbphy_parse_dt(sphy);
- if (ret < 0)
- return ret;
- } else {
- if (!pdata) {
- dev_err(dev, "no platform data specified\n");
- return -EINVAL;
- }
- }
-
- sphy->plat = pdata;
- sphy->regs = phy_base;
- sphy->clk = clk;
- sphy->drv_data = drv_data;
- sphy->phy.dev = sphy->dev;
- sphy->phy.label = "samsung-usbphy";
- sphy->phy.init = samsung_usbphy_init;
- sphy->phy.shutdown = samsung_usbphy_shutdown;
- sphy->ref_clk_freq = samsung_usbphy_get_refclk_freq(sphy);
-
- sphy->phy.otg = otg;
- sphy->phy.otg->phy = &sphy->phy;
- sphy->phy.otg->set_host = samsung_usbphy_set_host;
-
- spin_lock_init(&sphy->lock);
-
- platform_set_drvdata(pdev, sphy);
-
- return usb_add_phy(&sphy->phy, USB_PHY_TYPE_USB2);
-}
-
-static int samsung_usbphy_remove(struct platform_device *pdev)
-{
- struct samsung_usbphy *sphy = platform_get_drvdata(pdev);
-
- usb_remove_phy(&sphy->phy);
-
- if (sphy->pmuregs)
- iounmap(sphy->pmuregs);
- if (sphy->sysreg)
- iounmap(sphy->sysreg);
-
- return 0;
-}
-
-static const struct samsung_usbphy_drvdata usbphy_s3c64xx = {
- .cpu_type = TYPE_S3C64XX,
- .devphy_en_mask = S3C64XX_USBPHY_ENABLE,
-};
-
-static const struct samsung_usbphy_drvdata usbphy_exynos4 = {
- .cpu_type = TYPE_EXYNOS4210,
- .devphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
-};
-
-static struct samsung_usbphy_drvdata usbphy_exynos5 = {
- .cpu_type = TYPE_EXYNOS5250,
- .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .hostphy_reg_offset = EXYNOS_USBHOST_PHY_CTRL_OFFSET,
-};
-
-#ifdef CONFIG_OF
-static const struct of_device_id samsung_usbphy_dt_match[] = {
- {
- .compatible = "samsung,s3c64xx-usbphy",
- .data = &usbphy_s3c64xx,
- }, {
- .compatible = "samsung,exynos4210-usbphy",
- .data = &usbphy_exynos4,
- }, {
- .compatible = "samsung,exynos5250-usbphy",
- .data = &usbphy_exynos5
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
-#endif
-
-static struct platform_device_id samsung_usbphy_driver_ids[] = {
- {
- .name = "s3c64xx-usbphy",
- .driver_data = (unsigned long)&usbphy_s3c64xx,
- }, {
- .name = "exynos4210-usbphy",
- .driver_data = (unsigned long)&usbphy_exynos4,
- }, {
- .name = "exynos5250-usbphy",
- .driver_data = (unsigned long)&usbphy_exynos5,
- },
- {},
-};
-
-MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);
-
-static struct platform_driver samsung_usbphy_driver = {
- .probe = samsung_usbphy_probe,
- .remove = samsung_usbphy_remove,
- .id_table = samsung_usbphy_driver_ids,
- .driver = {
- .name = "samsung-usbphy",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(samsung_usbphy_dt_match),
- },
-};
-
-module_platform_driver(samsung_usbphy_driver);
-
-MODULE_DESCRIPTION("Samsung USB phy controller");
-MODULE_AUTHOR("Praveen Paneri <p.paneri@xxxxxxxxxxx>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:samsung-usbphy");
+EXPORT_SYMBOL_GPL(samsung_usbphy_get_refclk_freq);
diff --git a/drivers/usb/phy/phy-samsung-usb.h b/drivers/usb/phy/phy-samsung-usb.h
new file mode 100644
index 0000000..481737d7
--- /dev/null
+++ b/drivers/usb/phy/phy-samsung-usb.h
@@ -0,0 +1,247 @@
+/* linux/drivers/usb/phy/phy-samsung-usb.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Samsung USB-PHY transceiver; talks to S3C HS OTG controller, EHCI-S5P and
+ * OHCI-EXYNOS controllers.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/usb/phy.h>
+
+/* Register definitions */
+
+#define SAMSUNG_PHYPWR (0x00)
+
+#define PHYPWR_NORMAL_MASK (0x19 << 0)
+#define PHYPWR_OTG_DISABLE (0x1 << 4)
+#define PHYPWR_ANALOG_POWERDOWN (0x1 << 3)
+#define PHYPWR_FORCE_SUSPEND (0x1 << 1)
+/* For Exynos4 */
+#define PHYPWR_NORMAL_MASK_PHY0 (0x39 << 0)
+#define PHYPWR_SLEEP_PHY0 (0x1 << 5)
+
+#define SAMSUNG_PHYCLK (0x04)
+
+#define PHYCLK_MODE_USB11 (0x1 << 6)
+#define PHYCLK_EXT_OSC (0x1 << 5)
+#define PHYCLK_COMMON_ON_N (0x1 << 4)
+#define PHYCLK_ID_PULL (0x1 << 2)
+#define PHYCLK_CLKSEL_MASK (0x3 << 0)
+#define PHYCLK_CLKSEL_48M (0x0 << 0)
+#define PHYCLK_CLKSEL_12M (0x2 << 0)
+#define PHYCLK_CLKSEL_24M (0x3 << 0)
+
+#define SAMSUNG_RSTCON (0x08)
+
+#define RSTCON_PHYLINK_SWRST (0x1 << 2)
+#define RSTCON_HLINK_SWRST (0x1 << 1)
+#define RSTCON_SWRST (0x1 << 0)
+
+/* EXYNOS5 */
+#define EXYNOS5_PHY_HOST_CTRL0 (0x00)
+
+#define HOST_CTRL0_PHYSWRSTALL (0x1 << 31)
+
+#define HOST_CTRL0_REFCLKSEL_MASK (0x3 << 19)
+#define HOST_CTRL0_REFCLKSEL_XTAL (0x0 << 19)
+#define HOST_CTRL0_REFCLKSEL_EXTL (0x1 << 19)
+#define HOST_CTRL0_REFCLKSEL_CLKCORE (0x2 << 19)
+
+#define HOST_CTRL0_FSEL_MASK (0x7 << 16)
+#define HOST_CTRL0_FSEL(_x) ((_x) << 16)
+
+#define FSEL_CLKSEL_50M (0x7)
+#define FSEL_CLKSEL_24M (0x5)
+#define FSEL_CLKSEL_20M (0x4)
+#define FSEL_CLKSEL_19200K (0x3)
+#define FSEL_CLKSEL_12M (0x2)
+#define FSEL_CLKSEL_10M (0x1)
+#define FSEL_CLKSEL_9600K (0x0)
+
+#define HOST_CTRL0_TESTBURNIN (0x1 << 11)
+#define HOST_CTRL0_RETENABLE (0x1 << 10)
+#define HOST_CTRL0_COMMONON_N (0x1 << 9)
+#define HOST_CTRL0_SIDDQ (0x1 << 6)
+#define HOST_CTRL0_FORCESLEEP (0x1 << 5)
+#define HOST_CTRL0_FORCESUSPEND (0x1 << 4)
+#define HOST_CTRL0_WORDINTERFACE (0x1 << 3)
+#define HOST_CTRL0_UTMISWRST (0x1 << 2)
+#define HOST_CTRL0_LINKSWRST (0x1 << 1)
+#define HOST_CTRL0_PHYSWRST (0x1 << 0)
+
+#define EXYNOS5_PHY_HOST_TUNE0 (0x04)
+
+#define EXYNOS5_PHY_HSIC_CTRL1 (0x10)
+
+#define EXYNOS5_PHY_HSIC_TUNE1 (0x14)
+
+#define EXYNOS5_PHY_HSIC_CTRL2 (0x20)
+
+#define EXYNOS5_PHY_HSIC_TUNE2 (0x24)
+
+#define HSIC_CTRL_REFCLKSEL_MASK (0x3 << 23)
+#define HSIC_CTRL_REFCLKSEL (0x2 << 23)
+
+#define HSIC_CTRL_REFCLKDIV_MASK (0x7f << 16)
+#define HSIC_CTRL_REFCLKDIV(_x) ((_x) << 16)
+#define HSIC_CTRL_REFCLKDIV_12 (0x24 << 16)
+#define HSIC_CTRL_REFCLKDIV_15 (0x1c << 16)
+#define HSIC_CTRL_REFCLKDIV_16 (0x1a << 16)
+#define HSIC_CTRL_REFCLKDIV_19_2 (0x15 << 16)
+#define HSIC_CTRL_REFCLKDIV_20 (0x14 << 16)
+
+#define HSIC_CTRL_SIDDQ (0x1 << 6)
+#define HSIC_CTRL_FORCESLEEP (0x1 << 5)
+#define HSIC_CTRL_FORCESUSPEND (0x1 << 4)
+#define HSIC_CTRL_WORDINTERFACE (0x1 << 3)
+#define HSIC_CTRL_UTMISWRST (0x1 << 2)
+#define HSIC_CTRL_PHYSWRST (0x1 << 0)
+
+#define EXYNOS5_PHY_HOST_EHCICTRL (0x30)
+
+#define HOST_EHCICTRL_ENAINCRXALIGN (0x1 << 29)
+#define HOST_EHCICTRL_ENAINCR4 (0x1 << 28)
+#define HOST_EHCICTRL_ENAINCR8 (0x1 << 27)
+#define HOST_EHCICTRL_ENAINCR16 (0x1 << 26)
+
+#define EXYNOS5_PHY_HOST_OHCICTRL (0x34)
+
+#define HOST_OHCICTRL_SUSPLGCY (0x1 << 3)
+#define HOST_OHCICTRL_APPSTARTCLK (0x1 << 2)
+#define HOST_OHCICTRL_CNTSEL (0x1 << 1)
+#define HOST_OHCICTRL_CLKCKTRST (0x1 << 0)
+
+#define EXYNOS5_PHY_OTG_SYS (0x38)
+
+#define OTG_SYS_PHYLINK_SWRESET (0x1 << 14)
+#define OTG_SYS_LINKSWRST_UOTG (0x1 << 13)
+#define OTG_SYS_PHY0_SWRST (0x1 << 12)
+
+#define OTG_SYS_REFCLKSEL_MASK (0x3 << 9)
+#define OTG_SYS_REFCLKSEL_XTAL (0x0 << 9)
+#define OTG_SYS_REFCLKSEL_EXTL (0x1 << 9)
+#define OTG_SYS_REFCLKSEL_CLKCORE (0x2 << 9)
+
+#define OTG_SYS_IDPULLUP_UOTG (0x1 << 8)
+#define OTG_SYS_COMMON_ON (0x1 << 7)
+
+#define OTG_SYS_FSEL_MASK (0x7 << 4)
+#define OTG_SYS_FSEL(_x) ((_x) << 4)
+
+#define OTG_SYS_FORCESLEEP (0x1 << 3)
+#define OTG_SYS_OTGDISABLE (0x1 << 2)
+#define OTG_SYS_SIDDQ_UOTG (0x1 << 1)
+#define OTG_SYS_FORCESUSPEND (0x1 << 0)
+
+#define EXYNOS5_PHY_OTG_TUNE (0x40)
+
+#ifndef MHZ
+#define MHZ (1000*1000)
+#endif
+
+#ifndef KHZ
+#define KHZ (1000)
+#endif
+
+#define EXYNOS_USBHOST_PHY_CTRL_OFFSET (0x4)
+#define S3C64XX_USBPHY_ENABLE (0x1 << 16)
+#define EXYNOS_USBPHY_ENABLE (0x1 << 0)
+#define EXYNOS_USB20PHY_CFG_HOST_LINK (0x1 << 0)
+
+enum samsung_cpu_type {
+ TYPE_S3C64XX,
+ TYPE_EXYNOS4210,
+ TYPE_EXYNOS5250,
+};
+
+/*
+ * struct samsung_usbphy_drvdata - driver data for various SoC variants
+ * @cpu_type: machine identifier
+ * @devphy_en_mask: device phy enable mask for PHY CONTROL register
+ * @hostphy_en_mask: host phy enable mask for PHY CONTROL register
+ * @devphy_reg_offset: offset to DEVICE PHY CONTROL register from
+ * mapped address of system controller.
+ * @hostphy_reg_offset: offset to HOST PHY CONTROL register from
+ * mapped address of system controller.
+ *
+ * Here we have a separate mask for device type phy.
+ * Having different masks for host and device type phy helps
+ * in setting independent masks in case of SoCs like S5PV210,
+ * in which PHY0 and PHY1 enable bits belong to same register
+ * placed at position 0 and 1 respectively.
+ * Although for newer SoCs like exynos these bits belong to
+ * different registers altogether placed at position 0.
+ */
+struct samsung_usbphy_drvdata {
+ int cpu_type;
+ int devphy_en_mask;
+ int hostphy_en_mask;
+ u32 devphy_reg_offset;
+ u32 hostphy_reg_offset;
+};
+
+/*
+ * struct samsung_usbphy - transceiver driver state
+ * @phy: transceiver structure
+ * @plat: platform data
+ * @dev: The parent device supplied to the probe function
+ * @clk: usb phy clock
+ * @regs: usb phy controller registers memory base
+ * @pmuregs: USB device PHY_CONTROL register memory base
+ * @sysreg: USB2.0 PHY_CFG register memory base
+ * @ref_clk_freq: reference clock frequency selection
+ * @drv_data: driver data available for different SoCs
+ * @phy_type: Samsung SoCs specific phy types: #HOST
+ * #DEVICE
+ * @phy_usage: usage count for phy
+ * @lock: lock for phy operations
+ */
+struct samsung_usbphy {
+ struct usb_phy phy;
+ struct samsung_usbphy_data *plat;
+ struct device *dev;
+ struct clk *clk;
+ void __iomem *regs;
+ void __iomem *pmuregs;
+ void __iomem *sysreg;
+ int ref_clk_freq;
+ const struct samsung_usbphy_drvdata *drv_data;
+ enum samsung_usb_phy_type phy_type;
+ atomic_t phy_usage;
+ spinlock_t lock;
+};
+
+#define phy_to_sphy(x) container_of((x), struct samsung_usbphy, phy)
+
+static const struct of_device_id samsung_usbphy_dt_match[];
+
+static inline const struct samsung_usbphy_drvdata
+*samsung_usbphy_get_driver_data(struct platform_device *pdev)
+{
+ if (pdev->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_node(samsung_usbphy_dt_match,
+ pdev->dev.of_node);
+ return match->data;
+ }
+
+ return (struct samsung_usbphy_drvdata *)
+ platform_get_device_id(pdev)->driver_data;
+}
+
+extern int samsung_usbphy_parse_dt(struct samsung_usbphy *sphy);
+extern void samsung_usbphy_set_isolation(struct samsung_usbphy *sphy, bool on);
+extern void samsung_usbphy_cfg_sel(struct samsung_usbphy *sphy);
+extern int samsung_usbphy_set_type(struct usb_phy *phy,
+ enum samsung_usb_phy_type phy_type);
+extern int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy);
diff --git a/drivers/usb/phy/phy-samsung-usb2.c b/drivers/usb/phy/phy-samsung-usb2.c
new file mode 100644
index 0000000..dce9681
--- /dev/null
+++ b/drivers/usb/phy/phy-samsung-usb2.c
@@ -0,0 +1,509 @@
+/* linux/drivers/usb/phy/phy-samsung-usb2.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Praveen Paneri <p.paneri@xxxxxxxxxxx>
+ *
+ * Samsung USB2.0 PHY transceiver; talks to S3C HS OTG controller, EHCI-S5P and
+ * OHCI-EXYNOS controllers.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/samsung_usb_phy.h>
+#include <linux/platform_data/samsung-usbphy.h>
+
+#include "phy-samsung-usb.h"
+
+static int samsung_usbphy_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ if (!otg)
+ return -ENODEV;
+
+ if (!otg->host)
+ otg->host = host;
+
+ return 0;
+}
+
+static bool exynos5_phyhost_is_on(void *regs)
+{
+ u32 reg;
+
+ reg = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
+
+ return !(reg & HOST_CTRL0_SIDDQ);
+}
+
+static void samsung_exynos5_usb2phy_enable(struct samsung_usbphy *sphy)
+{
+ void __iomem *regs = sphy->regs;
+ u32 phyclk = sphy->ref_clk_freq;
+ u32 phyhost;
+ u32 phyotg;
+ u32 phyhsic;
+ u32 ehcictrl;
+ u32 ohcictrl;
+
+ /*
+ * phy_usage helps in keeping usage count for phy
+ * so that the first consumer enabling the phy is also
+ * the last consumer to disable it.
+ */
+
+ atomic_inc(&sphy->phy_usage);
+
+ if (exynos5_phyhost_is_on(regs)) {
+ dev_info(sphy->dev, "Already power on PHY\n");
+ return;
+ }
+
+ /* Host configuration */
+ phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
+
+ /* phy reference clock configuration */
+ phyhost &= ~HOST_CTRL0_FSEL_MASK;
+ phyhost |= HOST_CTRL0_FSEL(phyclk);
+
+ /* host phy reset */
+ phyhost &= ~(HOST_CTRL0_PHYSWRST |
+ HOST_CTRL0_PHYSWRSTALL |
+ HOST_CTRL0_SIDDQ |
+ /* Enable normal mode of operation */
+ HOST_CTRL0_FORCESUSPEND |
+ HOST_CTRL0_FORCESLEEP);
+
+ /* Link reset */
+ phyhost |= (HOST_CTRL0_LINKSWRST |
+ HOST_CTRL0_UTMISWRST |
+ /* COMMON Block configuration during suspend */
+ HOST_CTRL0_COMMONON_N);
+ writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
+ udelay(10);
+ phyhost &= ~(HOST_CTRL0_LINKSWRST |
+ HOST_CTRL0_UTMISWRST);
+ writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
+
+ /* OTG configuration */
+ phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS);
+
+ /* phy reference clock configuration */
+ phyotg &= ~OTG_SYS_FSEL_MASK;
+ phyotg |= OTG_SYS_FSEL(phyclk);
+
+ /* Enable normal mode of operation */
+ phyotg &= ~(OTG_SYS_FORCESUSPEND |
+ OTG_SYS_SIDDQ_UOTG |
+ OTG_SYS_FORCESLEEP |
+ OTG_SYS_REFCLKSEL_MASK |
+ /* COMMON Block configuration during suspend */
+ OTG_SYS_COMMON_ON);
+
+ /* OTG phy & link reset */
+ phyotg |= (OTG_SYS_PHY0_SWRST |
+ OTG_SYS_LINKSWRST_UOTG |
+ OTG_SYS_PHYLINK_SWRESET |
+ OTG_SYS_OTGDISABLE |
+ /* Set phy refclk */
+ OTG_SYS_REFCLKSEL_CLKCORE);
+
+ writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
+ udelay(10);
+ phyotg &= ~(OTG_SYS_PHY0_SWRST |
+ OTG_SYS_LINKSWRST_UOTG |
+ OTG_SYS_PHYLINK_SWRESET);
+ writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
+
+ /* HSIC phy configuration */
+ phyhsic = (HSIC_CTRL_REFCLKDIV_12 |
+ HSIC_CTRL_REFCLKSEL |
+ HSIC_CTRL_PHYSWRST);
+ writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
+ writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
+ udelay(10);
+ phyhsic &= ~HSIC_CTRL_PHYSWRST;
+ writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
+ writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
+
+ udelay(80);
+
+ /* enable EHCI DMA burst */
+ ehcictrl = readl(regs + EXYNOS5_PHY_HOST_EHCICTRL);
+ ehcictrl |= (HOST_EHCICTRL_ENAINCRXALIGN |
+ HOST_EHCICTRL_ENAINCR4 |
+ HOST_EHCICTRL_ENAINCR8 |
+ HOST_EHCICTRL_ENAINCR16);
+ writel(ehcictrl, regs + EXYNOS5_PHY_HOST_EHCICTRL);
+
+ /* set ohci_suspend_on_n */
+ ohcictrl = readl(regs + EXYNOS5_PHY_HOST_OHCICTRL);
+ ohcictrl |= HOST_OHCICTRL_SUSPLGCY;
+ writel(ohcictrl, regs + EXYNOS5_PHY_HOST_OHCICTRL);
+}
+
+static void samsung_usb2phy_enable(struct samsung_usbphy *sphy)
+{
+ void __iomem *regs = sphy->regs;
+ u32 phypwr;
+ u32 phyclk;
+ u32 rstcon;
+
+ /* set clock frequency for PLL */
+ phyclk = sphy->ref_clk_freq;
+ phypwr = readl(regs + SAMSUNG_PHYPWR);
+ rstcon = readl(regs + SAMSUNG_RSTCON);
+
+ switch (sphy->drv_data->cpu_type) {
+ case TYPE_S3C64XX:
+ phyclk &= ~PHYCLK_COMMON_ON_N;
+ phypwr &= ~PHYPWR_NORMAL_MASK;
+ rstcon |= RSTCON_SWRST;
+ break;
+ case TYPE_EXYNOS4210:
+ phypwr &= ~PHYPWR_NORMAL_MASK_PHY0;
+ rstcon |= RSTCON_SWRST;
+ default:
+ break;
+ }
+
+ writel(phyclk, regs + SAMSUNG_PHYCLK);
+ /* Configure PHY0 for normal operation*/
+ writel(phypwr, regs + SAMSUNG_PHYPWR);
+ /* reset all ports of PHY and Link */
+ writel(rstcon, regs + SAMSUNG_RSTCON);
+ udelay(10);
+ rstcon &= ~RSTCON_SWRST;
+ writel(rstcon, regs + SAMSUNG_RSTCON);
+}
+
+static void samsung_exynos5_usb2phy_disable(struct samsung_usbphy *sphy)
+{
+ void __iomem *regs = sphy->regs;
+ u32 phyhost;
+ u32 phyotg;
+ u32 phyhsic;
+
+ if (atomic_dec_return(&sphy->phy_usage) > 0) {
+ dev_info(sphy->dev, "still being used\n");
+ return;
+ }
+
+ phyhsic = (HSIC_CTRL_REFCLKDIV_12 |
+ HSIC_CTRL_REFCLKSEL |
+ HSIC_CTRL_SIDDQ |
+ HSIC_CTRL_FORCESLEEP |
+ HSIC_CTRL_FORCESUSPEND);
+ writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
+ writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
+
+ phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
+ phyhost |= (HOST_CTRL0_SIDDQ |
+ HOST_CTRL0_FORCESUSPEND |
+ HOST_CTRL0_FORCESLEEP |
+ HOST_CTRL0_PHYSWRST |
+ HOST_CTRL0_PHYSWRSTALL);
+ writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
+
+ phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS);
+ phyotg |= (OTG_SYS_FORCESUSPEND |
+ OTG_SYS_SIDDQ_UOTG |
+ OTG_SYS_FORCESLEEP);
+ writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
+}
+
+static void samsung_usb2phy_disable(struct samsung_usbphy *sphy)
+{
+ void __iomem *regs = sphy->regs;
+ u32 phypwr;
+
+ phypwr = readl(regs + SAMSUNG_PHYPWR);
+
+ switch (sphy->drv_data->cpu_type) {
+ case TYPE_S3C64XX:
+ phypwr |= PHYPWR_NORMAL_MASK;
+ break;
+ case TYPE_EXYNOS4210:
+ phypwr |= PHYPWR_NORMAL_MASK_PHY0;
+ default:
+ break;
+ }
+
+ /* Disable analog and otg block power */
+ writel(phypwr, regs + SAMSUNG_PHYPWR);
+}
+
+/*
+ * The function passed to the usb driver for phy initialization
+ */
+static int samsung_usb2phy_init(struct usb_phy *phy)
+{
+ struct samsung_usbphy *sphy;
+ struct usb_bus *host = NULL;
+ unsigned long flags;
+ int ret = 0;
+
+ sphy = phy_to_sphy(phy);
+
+ host = phy->otg->host;
+
+ /* Enable the phy clock */
+ ret = clk_prepare_enable(sphy->clk);
+ if (ret) {
+ dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
+ return ret;
+ }
+
+ spin_lock_irqsave(&sphy->lock, flags);
+
+ if (host) {
+ /* setting default phy-type for USB 2.0 */
+ if (!strstr(dev_name(host->controller), "ehci") ||
+ !strstr(dev_name(host->controller), "ohci"))
+ samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST);
+ } else {
+ samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
+ }
+
+ /* Disable phy isolation */
+ if (sphy->plat && sphy->plat->pmu_isolation)
+ sphy->plat->pmu_isolation(false);
+ else
+ samsung_usbphy_set_isolation(sphy, false);
+
+ /* Selecting Host/OTG mode; After reset USB2.0PHY_CFG: HOST */
+ samsung_usbphy_cfg_sel(sphy);
+
+ /* Initialize usb phy registers */
+ if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
+ samsung_exynos5_usb2phy_enable(sphy);
+ else
+ samsung_usb2phy_enable(sphy);
+
+ spin_unlock_irqrestore(&sphy->lock, flags);
+
+ /* Disable the phy clock */
+ clk_disable_unprepare(sphy->clk);
+
+ return ret;
+}
+
+/*
+ * The function passed to the usb driver for phy shutdown
+ */
+static void samsung_usb2phy_shutdown(struct usb_phy *phy)
+{
+ struct samsung_usbphy *sphy;
+ struct usb_bus *host = NULL;
+ unsigned long flags;
+
+ sphy = phy_to_sphy(phy);
+
+ host = phy->otg->host;
+
+ if (clk_prepare_enable(sphy->clk)) {
+ dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
+ return;
+ }
+
+ spin_lock_irqsave(&sphy->lock, flags);
+
+ if (host) {
+ /* setting default phy-type for USB 2.0 */
+ if (!strstr(dev_name(host->controller), "ehci") ||
+ !strstr(dev_name(host->controller), "ohci"))
+ samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST);
+ } else {
+ samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
+ }
+
+ /* De-initialize usb phy registers */
+ if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
+ samsung_exynos5_usb2phy_disable(sphy);
+ else
+ samsung_usb2phy_disable(sphy);
+
+ /* Enable phy isolation */
+ if (sphy->plat && sphy->plat->pmu_isolation)
+ sphy->plat->pmu_isolation(true);
+ else
+ samsung_usbphy_set_isolation(sphy, true);
+
+ spin_unlock_irqrestore(&sphy->lock, flags);
+
+ clk_disable_unprepare(sphy->clk);
+}
+
+static int samsung_usb2phy_probe(struct platform_device *pdev)
+{
+ struct samsung_usbphy *sphy;
+ struct usb_otg *otg;
+ struct samsung_usbphy_data *pdata = pdev->dev.platform_data;
+ const struct samsung_usbphy_drvdata *drv_data;
+ struct device *dev = &pdev->dev;
+ struct resource *phy_mem;
+ void __iomem *phy_base;
+ struct clk *clk;
+ int ret;
+
+ phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!phy_mem) {
+ dev_err(dev, "%s: missing mem resource\n", __func__);
+ return -ENODEV;
+ }
+
+ phy_base = devm_ioremap_resource(dev, phy_mem);
+ if (IS_ERR(phy_base))
+ return PTR_ERR(phy_base);
+
+ sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL);
+ if (!sphy)
+ return -ENOMEM;
+
+ otg = devm_kzalloc(dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ drv_data = samsung_usbphy_get_driver_data(pdev);
+
+ if (drv_data->cpu_type == TYPE_EXYNOS5250)
+ clk = devm_clk_get(dev, "usbhost");
+ else
+ clk = devm_clk_get(dev, "otg");
+
+ if (IS_ERR(clk)) {
+ dev_err(dev, "Failed to get otg clock\n");
+ return PTR_ERR(clk);
+ }
+
+ sphy->dev = dev;
+
+ if (dev->of_node) {
+ ret = samsung_usbphy_parse_dt(sphy);
+ if (ret < 0)
+ return ret;
+ } else {
+ if (!pdata) {
+ dev_err(dev, "no platform data specified\n");
+ return -EINVAL;
+ }
+ }
+
+ sphy->plat = pdata;
+ sphy->regs = phy_base;
+ sphy->clk = clk;
+ sphy->drv_data = drv_data;
+ sphy->phy.dev = sphy->dev;
+ sphy->phy.label = "samsung-usb2phy";
+ sphy->phy.init = samsung_usb2phy_init;
+ sphy->phy.shutdown = samsung_usb2phy_shutdown;
+ sphy->ref_clk_freq = samsung_usbphy_get_refclk_freq(sphy);
+
+ sphy->phy.otg = otg;
+ sphy->phy.otg->phy = &sphy->phy;
+ sphy->phy.otg->set_host = samsung_usbphy_set_host;
+
+ spin_lock_init(&sphy->lock);
+
+ platform_set_drvdata(pdev, sphy);
+
+ return usb_add_phy(&sphy->phy, USB_PHY_TYPE_USB2);
+}
+
+static int samsung_usb2phy_remove(struct platform_device *pdev)
+{
+ struct samsung_usbphy *sphy = platform_get_drvdata(pdev);
+
+ usb_remove_phy(&sphy->phy);
+
+ if (sphy->pmuregs)
+ iounmap(sphy->pmuregs);
+ if (sphy->sysreg)
+ iounmap(sphy->sysreg);
+
+ return 0;
+}
+
+static const struct samsung_usbphy_drvdata usb2phy_s3c64xx = {
+ .cpu_type = TYPE_S3C64XX,
+ .devphy_en_mask = S3C64XX_USBPHY_ENABLE,
+};
+
+static const struct samsung_usbphy_drvdata usb2phy_exynos4 = {
+ .cpu_type = TYPE_EXYNOS4210,
+ .devphy_en_mask = EXYNOS_USBPHY_ENABLE,
+ .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
+};
+
+static struct samsung_usbphy_drvdata usb2phy_exynos5 = {
+ .cpu_type = TYPE_EXYNOS5250,
+ .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
+ .hostphy_reg_offset = EXYNOS_USBHOST_PHY_CTRL_OFFSET,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id samsung_usbphy_dt_match[] = {
+ {
+ .compatible = "samsung,s3c64xx-usb2phy",
+ .data = &usb2phy_s3c64xx,
+ }, {
+ .compatible = "samsung,exynos4210-usb2phy",
+ .data = &usb2phy_exynos4,
+ }, {
+ .compatible = "samsung,exynos5250-usb2phy",
+ .data = &usb2phy_exynos5
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
+#endif
+
+static struct platform_device_id samsung_usbphy_driver_ids[] = {
+ {
+ .name = "s3c64xx-usb2phy",
+ .driver_data = (unsigned long)&usb2phy_s3c64xx,
+ }, {
+ .name = "exynos4210-usb2phy",
+ .driver_data = (unsigned long)&usb2phy_exynos4,
+ }, {
+ .name = "exynos5250-usb2phy",
+ .driver_data = (unsigned long)&usb2phy_exynos5,
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);
+
+static struct platform_driver samsung_usb2phy_driver = {
+ .probe = samsung_usb2phy_probe,
+ .remove = samsung_usb2phy_remove,
+ .id_table = samsung_usbphy_driver_ids,
+ .driver = {
+ .name = "samsung-usb2phy",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(samsung_usbphy_dt_match),
+ },
+};
+
+module_platform_driver(samsung_usb2phy_driver);
+
+MODULE_DESCRIPTION("Samsung USB 2.0 phy controller");
+MODULE_AUTHOR("Praveen Paneri <p.paneri@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:samsung-usb2phy");
--
1.7.6.5
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