ARM: EXYNOS4: Add support for USB Gadget Device

Adds support for USB Gadget Device on Exynos4 SoCs. In addition,
USB PHY0 configuration for USB Device Controller is added in
setup-usb-phy.c

Signed-off-by: Bhuvana Kakunoori <bhuvana.kakunoori@linaro.org>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samung.com>

5 files changed, 69 insertions, 31 deletions

diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig
index 286d6cd8bd9e..a351725c8251 100644
--- a/arch/arm/mach-exynos4/Kconfig
+++ b/arch/arm/mach-exynos4/Kconfig
@@ -162,6 +162,7 @@ config MACH_SMDKV310
 	select S3C_DEV_HSMMC1
 	select S3C_DEV_HSMMC2
 	select S3C_DEV_HSMMC3
+	select S5P_DEV_USB_HSDEVICE
 	select EXYNOS4_DEV_AHCI
 	select SAMSUNG_DEV_KEYPAD
 	select SAMSUNG_DEV_TS
@@ -171,6 +172,7 @@ config MACH_SMDKV310
 	select EXYNOS4_SETUP_KEYPAD
 	select EXYNOS4_SETUP_TS
 	select EXYNOS4_SETUP_SDHCI
+	select EXYNOS4_SETUP_USB_PHY
 	help
 	  Machine support for Samsung SMDKV310
 
@@ -243,6 +245,8 @@ config MACH_ORIGEN
 	select EXYNOS4_SETUP_SDHCI
 	select EXYNOS4_SETUP_I2C0
 	select EXYNOS4_SETUP_I2C1
+	select S5P_DEV_USB_HSDEVICE
+	select EXYNOS4_SETUP_USB_PHY
 	help
 	  Machine support for ORIGEN based on Samsung EXYNOS4210
 
diff --git a/arch/arm/mach-exynos4/cpu.c b/arch/arm/mach-exynos4/cpu.c
index 3b8a7c3f2050..e945bee44a53 100644
--- a/arch/arm/mach-exynos4/cpu.c
+++ b/arch/arm/mach-exynos4/cpu.c
@@ -114,7 +114,12 @@ static struct map_desc exynos4_iodesc[] __initdata = {
 		.pfn		= __phys_to_pfn(EXYNOS4_PA_HSPHY),
 		.length		= SZ_4K,
 		.type		= MT_DEVICE,
-	}
+	}, {
+		.virtual	= (unsigned long)S3C_VA_HSDEVICE,
+		.pfn		= __phys_to_pfn(EXYNOS4_PA_HSDEVICE),
+		.length		= SZ_64K,
+		.type		= MT_DEVICE,
+	},
 };
 
 static void exynos4_idle(void)
diff --git a/arch/arm/mach-exynos4/include/mach/map.h b/arch/arm/mach-exynos4/include/mach/map.h
index 40da20abe097..033ec76fe640 100644
--- a/arch/arm/mach-exynos4/include/mach/map.h
+++ b/arch/arm/mach-exynos4/include/mach/map.h
@@ -99,6 +99,8 @@
 #define EXYNOS4_PA_MIPI_CSIS0		0x11880000
 #define EXYNOS4_PA_MIPI_CSIS1		0x11890000
 
+#define EXYNOS4_PA_HSDEVICE		0x12480000
+
 #define EXYNOS4_PA_HSMMC(x)		(0x12510000 + ((x) * 0x10000))
 
 #define EXYNOS4_PA_SATA			0x12560000
@@ -157,6 +159,7 @@
 #define S5P_PA_SYSCON			EXYNOS4_PA_SYSCON
 #define S5P_PA_TIMER			EXYNOS4_PA_TIMER
 #define S5P_PA_EHCI			EXYNOS4_PA_EHCI
+#define S5P_PA_HSDEVICE			EXYNOS4_PA_HSDEVICE
 
 #define SAMSUNG_PA_KEYPAD		EXYNOS4_PA_KEYPAD
 
diff --git a/arch/arm/mach-exynos4/include/mach/regs-pmu.h b/arch/arm/mach-exynos4/include/mach/regs-pmu.h
index a9643371f8e7..526e551437a4 100644
--- a/arch/arm/mach-exynos4/include/mach/regs-pmu.h
+++ b/arch/arm/mach-exynos4/include/mach/regs-pmu.h
@@ -33,6 +33,7 @@
 #define S5P_EINT_WAKEUP_MASK			S5P_PMUREG(0x0604)
 #define S5P_WAKEUP_MASK				S5P_PMUREG(0x0608)
 
+#define S5P_USBDEVICE_PHY_CONTROL		S5P_PMUREG(0x0704)
 #define S5P_USBHOST_PHY_CONTROL			S5P_PMUREG(0x0708)
 #define S5P_USBHOST_PHY_ENABLE			(1 << 0)
 
diff --git a/arch/arm/mach-exynos4/setup-usb-phy.c b/arch/arm/mach-exynos4/setup-usb-phy.c
index 0883c1b824b9..bec562662149 100644
--- a/arch/arm/mach-exynos4/setup-usb-phy.c
+++ b/arch/arm/mach-exynos4/setup-usb-phy.c
@@ -14,12 +14,14 @@
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
+#include <linux/usb/ch9.h>
 #include <mach/regs-pmu.h>
 #include <mach/regs-usb-phy.h>
 #include <plat/cpu.h>
 #include <plat/usb-phy.h>
+#include <plat/regs-otg.h>
 
-static int exynos4_usb_phy1_init(struct platform_device *pdev)
+static int exynos4_usb_phy1_init(struct platform_device *pdev, int type)
 {
 	struct clk *otg_clk;
 	struct clk *xusbxti_clk;
@@ -39,9 +41,6 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev)
 		return err;
 	}
 
-	writel(readl(S5P_USBHOST_PHY_CONTROL) | S5P_USBHOST_PHY_ENABLE,
-			S5P_USBHOST_PHY_CONTROL);
-
 	/* set clock frequency for PLL */
 	phyclk = readl(EXYNOS4_PHYCLK) & ~CLKSEL_MASK;
 
@@ -64,24 +63,43 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev)
 
 	writel(phyclk, EXYNOS4_PHYCLK);
 
-	/* floating prevention logic: disable */
-	writel((readl(EXYNOS4_PHY1CON) | FPENABLEN), EXYNOS4_PHY1CON);
+	if (type == S5P_USB_PHY_HOST) {
+		writel(readl(S5P_USBHOST_PHY_CONTROL) | S5P_USBHOST_PHY_ENABLE,
+			S5P_USBHOST_PHY_CONTROL);
+
+		writel((readl(EXYNOS4_PHY1CON) | FPENABLEN), EXYNOS4_PHY1CON);
 
-	/* set to normal HSIC 0 and 1 of PHY1 */
-	writel((readl(EXYNOS4_PHYPWR) & ~PHY1_HSIC_NORMAL_MASK),
+		/* set to normal HSIC 0 and 1 of PHY1 */
+		writel((readl(EXYNOS4_PHYPWR) & ~PHY1_HSIC_NORMAL_MASK),
 			EXYNOS4_PHYPWR);
 
-	/* set to normal standard USB of PHY1 */
-	writel((readl(EXYNOS4_PHYPWR) & ~PHY1_STD_NORMAL_MASK), EXYNOS4_PHYPWR);
+		/* set to normal standard USB of PHY1 */
+		writel((readl(EXYNOS4_PHYPWR) & ~PHY1_STD_NORMAL_MASK),
+			EXYNOS4_PHYPWR);
 
-	/* reset all ports of both PHY and Link */
-	rstcon = readl(EXYNOS4_RSTCON) | HOST_LINK_PORT_SWRST_MASK |
-		PHY1_SWRST_MASK;
-	writel(rstcon, EXYNOS4_RSTCON);
-	udelay(10);
+		/* reset all ports of both PHY and Link */
+		rstcon = readl(EXYNOS4_RSTCON) | HOST_LINK_PORT_SWRST_MASK |
+			PHY1_SWRST_MASK;
+
+		writel(rstcon, EXYNOS4_RSTCON);
+		udelay(10);
+
+		rstcon &= ~(HOST_LINK_PORT_SWRST_MASK | PHY1_SWRST_MASK);
+		writel(rstcon, EXYNOS4_RSTCON);
+	} else if (type == S5P_USB_PHY_DEVICE) {
+		writel(readl(S5P_USBDEVICE_PHY_CONTROL) | (0x1<<0),
+				S5P_USBDEVICE_PHY_CONTROL);
+		writel((readl(EXYNOS4_PHYPWR) & ~(0x7<<3)&~(0x1<<0)),
+				EXYNOS4_PHYPWR);
+		writel((readl(EXYNOS4_PHYCLK) & ~(0x5<<2))|(0x3<<0),
+				EXYNOS4_PHYCLK);
+		writel((readl(EXYNOS4_RSTCON) & ~(0x3<<1))|(0x1<<0),
+				EXYNOS4_RSTCON);
+		udelay(10);
+		writel(readl(EXYNOS4_RSTCON) & ~(0x7<<0),
+				EXYNOS4_RSTCON);
+	}
 
-	rstcon &= ~(HOST_LINK_PORT_SWRST_MASK | PHY1_SWRST_MASK);
-	writel(rstcon, EXYNOS4_RSTCON);
 	udelay(50);
 
 	clk_disable(otg_clk);
@@ -90,7 +108,7 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev)
 	return 0;
 }
 
-static int exynos4_usb_phy1_exit(struct platform_device *pdev)
+static int exynos4_usb_phy1_exit(struct platform_device *pdev, int type)
 {
 	struct clk *otg_clk;
 	int err;
@@ -107,11 +125,20 @@ static int exynos4_usb_phy1_exit(struct platform_device *pdev)
 		return err;
 	}
 
-	writel((readl(EXYNOS4_PHYPWR) | PHY1_STD_ANALOG_POWERDOWN),
-			EXYNOS4_PHYPWR);
+	if (type == S5P_USB_PHY_HOST) {
+		writel((readl(EXYNOS4_PHYPWR) | PHY1_STD_ANALOG_POWERDOWN),
+				EXYNOS4_PHYPWR);
 
-	writel(readl(S5P_USBHOST_PHY_CONTROL) & ~S5P_USBHOST_PHY_ENABLE,
-			S5P_USBHOST_PHY_CONTROL);
+		writel(readl(S5P_USBHOST_PHY_CONTROL) & ~S5P_USBHOST_PHY_ENABLE,
+				S5P_USBHOST_PHY_CONTROL);
+	} else if (type == S5P_USB_PHY_DEVICE) {
+		writel(readl(EXYNOS4_PHYPWR) | (0x3<<3),
+				EXYNOS4_PHYPWR);
+
+		writel(readl(S5P_USBDEVICE_PHY_CONTROL) & ~(1<<0),
+				S5P_USBDEVICE_PHY_CONTROL);
+
+	}
 
 	clk_disable(otg_clk);
 	clk_put(otg_clk);
@@ -121,16 +148,14 @@ static int exynos4_usb_phy1_exit(struct platform_device *pdev)
 
 int s5p_usb_phy_init(struct platform_device *pdev, int type)
 {
-	if (type == S5P_USB_PHY_HOST)
-		return exynos4_usb_phy1_init(pdev);
-
-	return -EINVAL;
+	return exynos4_usb_phy1_init(pdev, type);
 }
 
 int s5p_usb_phy_exit(struct platform_device *pdev, int type)
 {
-	if (type == S5P_USB_PHY_HOST)
-		return exynos4_usb_phy1_exit(pdev);
-
-	return -EINVAL;
+	return exynos4_usb_phy1_exit(pdev, type);
 }
+
+/* USB Control request data struct must be located here for DMA transfer */
+struct usb_ctrlrequest usb_ctrl __attribute__((aligned(8)));
+EXPORT_SYMBOL(usb_ctrl);