ARM: S3C64XX: Add usb otg phy control

This patch supports to control usb otg phy of S3C64XX. Currently, the
driver for usb otg controls usb otg phy but it can be removed by this
patch.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[Rebased on the newest git/kgene/linux-samsung #for-next]
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Mark Brown<broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

6 files changed, 110 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig
index dd20c66cd700..326ea3a98725 100644
--- a/arch/arm/mach-s3c64xx/Kconfig
+++ b/arch/arm/mach-s3c64xx/Kconfig
@@ -83,6 +83,11 @@ config S3C64XX_SETUP_SPI
         help
          Common setup code for SPI GPIO configurations
 
+config S3C64XX_SETUP_USB_PHY
+        bool
+        help
+          Common setup code for USB PHY controller
+
 # S36400 Macchine support
 
 config MACH_SMDK6400
@@ -157,6 +162,7 @@ config MACH_SMDK6410
         select S3C64XX_SETUP_IDE
         select S3C64XX_SETUP_FB_24BPP
         select S3C64XX_SETUP_KEYPAD
+        select S3C64XX_SETUP_USB_PHY
         help
           Machine support for the Samsung SMDK6410
 
@@ -256,6 +262,7 @@ config MACH_SMARTQ
         select S3C_DEV_USB_HOST
         select S3C64XX_SETUP_SDHCI
         select S3C64XX_SETUP_FB_24BPP
+        select S3C64XX_SETUP_USB_PHY
         select SAMSUNG_DEV_ADC
         select SAMSUNG_DEV_PWM
         select SAMSUNG_DEV_TS
@@ -283,6 +290,7 @@ config MACH_WLF_CRAGG_6410
         select S3C64XX_SETUP_FB_24BPP
         select S3C64XX_SETUP_KEYPAD
         select S3C64XX_SETUP_SPI
+        select S3C64XX_SETUP_USB_PHY
         select SAMSUNG_DEV_ADC
         select SAMSUNG_DEV_KEYPAD
         select S3C_DEV_USB_HOST
diff --git a/arch/arm/mach-s3c64xx/Makefile b/arch/arm/mach-s3c64xx/Makefile
index 610fe2807ed7..f9ce1dc28ce4 100644
--- a/arch/arm/mach-s3c64xx/Makefile
+++ b/arch/arm/mach-s3c64xx/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_S3C64XX_SETUP_IDE)		+= setup-ide.o
 obj-$(CONFIG_S3C64XX_SETUP_KEYPAD)      += setup-keypad.o
 obj-$(CONFIG_S3C64XX_SETUP_SDHCI_GPIO)  += setup-sdhci-gpio.o
 obj-$(CONFIG_S3C64XX_SETUP_SPI)         += setup-spi.o
+obj-$(CONFIG_S3C64XX_SETUP_USB_PHY) += setup-usb-phy.o
 
 # Machine support
 
diff --git a/arch/arm/mach-s3c64xx/mach-crag6410.c b/arch/arm/mach-s3c64xx/mach-crag6410.c
index 8077f650eb0e..3b56bd9cb880 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410.c
@@ -59,6 +59,7 @@
 #include <plat/sdhci.h>
 #include <plat/gpio-cfg.h>
 #include <plat/s3c64xx-spi.h>
+#include <plat/udc-hs.h>
 
 #include <plat/keypad.h>
 #include <plat/clock.h>
@@ -698,6 +699,8 @@ static struct s3c_sdhci_platdata crag6410_hsmmc0_pdata = {
         .cfg_gpio               = crag6410_cfg_sdhci0,
 };
 
+static struct s3c_hsotg_plat crag6410_hsotg_pdata;
+
 static void __init crag6410_machine_init(void)
 {
         /* Open drain IRQs need pullups */
@@ -722,6 +725,7 @@ static void __init crag6410_machine_init(void)
         s3c_i2c0_set_platdata(&i2c0_pdata);
         s3c_i2c1_set_platdata(&i2c1_pdata);
         s3c_fb_set_platdata(&crag6410_lcd_pdata);
+        s3c_hsotg_set_platdata(&crag6410_hsotg_pdata);
 
         i2c_register_board_info(0, i2c_devs0, ARRAY_SIZE(i2c_devs0));
         i2c_register_board_info(1, i2c_devs1, ARRAY_SIZE(i2c_devs1));
diff --git a/arch/arm/mach-s3c64xx/mach-smartq.c b/arch/arm/mach-s3c64xx/mach-smartq.c
index ce31db136231..ce745e19aa27 100644
--- a/arch/arm/mach-s3c64xx/mach-smartq.c
+++ b/arch/arm/mach-s3c64xx/mach-smartq.c
@@ -187,6 +187,8 @@ static struct s3c_hwmon_pdata smartq_hwmon_pdata __initdata = {
         },
 };
 
+static struct s3c_hsotg_plat smartq_hsotg_pdata;
+
 static int __init smartq_lcd_setup_gpio(void)
 {
         int ret;
@@ -383,6 +385,7 @@ void __init smartq_map_io(void)
 void __init smartq_machine_init(void)
 {
         s3c_i2c0_set_platdata(NULL);
+        s3c_hsotg_set_platdata(&smartq_hsotg_pdata);
         s3c_hwmon_set_platdata(&smartq_hwmon_pdata);
         s3c_sdhci1_set_platdata(&smartq_internal_hsmmc_pdata);
         s3c_sdhci2_set_platdata(&smartq_internal_hsmmc_pdata);
diff --git a/arch/arm/mach-s3c64xx/mach-smdk6410.c b/arch/arm/mach-s3c64xx/mach-smdk6410.c
index ca6fc204f0ea..d55bc96d9582 100644
--- a/arch/arm/mach-s3c64xx/mach-smdk6410.c
+++ b/arch/arm/mach-s3c64xx/mach-smdk6410.c
@@ -72,6 +72,7 @@
 #include <plat/keypad.h>
 #include <plat/backlight.h>
 #include <plat/regs-fb-v4.h>
+#include <plat/udc-hs.h>
 
 #include "common.h"
 
@@ -631,6 +632,8 @@ static struct platform_pwm_backlight_data smdk6410_bl_data = {
         .pwm_id = 1,
 };
 
+static struct s3c_hsotg_plat smdk6410_hsotg_pdata;
+
 static void __init smdk6410_map_io(void)
 {
         u32 tmp;
@@ -659,6 +662,7 @@ static void __init smdk6410_machine_init(void)
         s3c_i2c0_set_platdata(NULL);
         s3c_i2c1_set_platdata(NULL);
         s3c_fb_set_platdata(&smdk6410_lcd_pdata);
+        s3c_hsotg_set_platdata(&smdk6410_hsotg_pdata);
 
         samsung_keypad_set_platdata(&smdk6410_keypad_data);
 
diff --git a/arch/arm/mach-s3c64xx/setup-usb-phy.c b/arch/arm/mach-s3c64xx/setup-usb-phy.c
new file mode 100644
index 000000000000..f6757e02d7db
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/setup-usb-phy.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Author: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <mach/map.h>
+#include <mach/regs-sys.h>
+#include <plat/cpu.h>
+#include <plat/regs-usb-hsotg-phy.h>
+#include <plat/usb-phy.h>
+
+static int s3c_usb_otgphy_init(struct platform_device *pdev)
+{
+        struct clk *xusbxti;
+        u32 phyclk;
+
+        writel(readl(S3C64XX_OTHERS) | S3C64XX_OTHERS_USBMASK, S3C64XX_OTHERS);
+
+        /* set clock frequency for PLL */
+        phyclk = readl(S3C_PHYCLK) & ~S3C_PHYCLK_CLKSEL_MASK;
+
+        xusbxti = clk_get(&pdev->dev, "xusbxti");
+        if (xusbxti && !IS_ERR(xusbxti)) {
+                switch (clk_get_rate(xusbxti)) {
+                case 12 * MHZ:
+                        phyclk |= S3C_PHYCLK_CLKSEL_12M;
+                        break;
+                case 24 * MHZ:
+                        phyclk |= S3C_PHYCLK_CLKSEL_24M;
+                        break;
+                default:
+                case 48 * MHZ:
+                        /* default reference clock */
+                        break;
+                }
+                clk_put(xusbxti);
+        }
+
+        /* TODO: select external clock/oscillator */
+        writel(phyclk | S3C_PHYCLK_CLK_FORCE, S3C_PHYCLK);
+
+        /* set to normal OTG PHY */
+        writel((readl(S3C_PHYPWR) & ~S3C_PHYPWR_NORMAL_MASK), S3C_PHYPWR);
+        mdelay(1);
+
+        /* reset OTG PHY and Link */
+        writel(S3C_RSTCON_PHY | S3C_RSTCON_HCLK | S3C_RSTCON_PHYCLK,
+                        S3C_RSTCON);
+        udelay(20);     /* at-least 10uS */
+        writel(0, S3C_RSTCON);
+
+        return 0;
+}
+
+static int s3c_usb_otgphy_exit(struct platform_device *pdev)
+{
+        writel((readl(S3C_PHYPWR) | S3C_PHYPWR_ANALOG_POWERDOWN |
+                                S3C_PHYPWR_OTG_DISABLE), S3C_PHYPWR);
+
+        writel(readl(S3C64XX_OTHERS) & ~S3C64XX_OTHERS_USBMASK, S3C64XX_OTHERS);
+
+        return 0;
+}
+
+int s5p_usb_phy_init(struct platform_device *pdev, int type)
+{
+        if (type == S5P_USB_PHY_DEVICE)
+                return s3c_usb_otgphy_init(pdev);
+
+        return -EINVAL;
+}
+
+int s5p_usb_phy_exit(struct platform_device *pdev, int type)
+{
+        if (type == S5P_USB_PHY_DEVICE)
+                return s3c_usb_otgphy_exit(pdev);
+
+        return -EINVAL;
+}