phy: exynos5250-usb2: add USB2.0 PHY for Exynos5433 SoC

Exynos5433 USB2.0 PHY register layout similar as Exynos5250.
But Exynos5433 has only one USB2.0 Host and one HSIC.

Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com>

3 files changed, 139 insertions, 0 deletions

diff --git a/drivers/phy/phy-exynos5250-usb2.c b/drivers/phy/phy-exynos5250-usb2.c
index 2ed1735a076a..41018257fe64 100644
--- a/drivers/phy/phy-exynos5250-usb2.c
+++ b/drivers/phy/phy-exynos5250-usb2.c
@@ -124,6 +124,9 @@
 #define EXYNOS_5250_USB_ISOL_HOST_OFFSET	0x708
 #define EXYNOS_5250_USB_ISOL_HOST		BIT(0)
 
+#define EXYNOS_5433_USB_ISOL_HOST_OFFSET	0x708
+#define EXYNOS_5433_USB_ISOL_HOST		BIT(0)
+
 /* Mode swtich register */
 #define EXYNOS_5250_MODE_SWITCH_OFFSET		0x230
 #define EXYNOS_5250_MODE_SWITCH_MASK		1
@@ -138,6 +141,12 @@ enum exynos4x12_phy_id {
 	EXYNOS5250_NUM_PHYS,
 };
 
+enum exynos5250_phy_id {
+	EXYNOS5433_HOST,
+	EXYNOS5433_HSIC,
+	EXYNOS5433_NUM_PHYS,
+};
+
 /*
  * exynos5250_rate_to_clk() converts the supplied clock rate to the value that
  * can be written to the phy register.
@@ -365,6 +374,109 @@ static int exynos5250_power_off(struct samsung_usb2_phy_instance *inst)
 	return 0;
 }
 
+static int exynos5433_power_on(struct samsung_usb2_phy_instance *inst)
+{
+	struct samsung_usb2_phy_driver *drv = inst->drv;
+	u32 ctrl0;
+	u32 ehci;
+	u32 ohci;
+	u32 hsic;
+
+	/* Host registers configuration */
+	ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
+	/* The clock */
+	ctrl0 &= ~EXYNOS_5250_HOSTPHYCTRL0_FSEL_MASK;
+	ctrl0 |= drv->ref_reg_val <<
+			EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT;
+
+	/* Reset */
+	ctrl0 &=	~(EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST |
+			EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL |
+			EXYNOS_5250_HOSTPHYCTRL0_SIDDQ |
+			EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND |
+			EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP);
+	ctrl0 |=	EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST |
+			EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST |
+			EXYNOS_5250_HOSTPHYCTRL0_COMMON_ON_N;
+	writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
+	udelay(10);
+	ctrl0 &=	~(EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST |
+			EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST);
+	writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
+
+	/* HSIC phy configuration */
+	hsic = (EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12 |
+			EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT |
+			EXYNOS_5250_HSICPHYCTRLX_PHYSWRST);
+	writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL1);
+	writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL2);
+	udelay(10);
+	hsic &= ~EXYNOS_5250_HSICPHYCTRLX_PHYSWRST;
+	writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL1);
+	writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL2);
+	/* The following delay is necessary for the reset sequence to be
+	 * completed */
+	udelay(80);
+
+	/* Enable EHCI DMA burst */
+	ehci = readl(drv->reg_phy + EXYNOS_5250_HOSTEHCICTRL);
+	ehci |=	EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN |
+		EXYNOS_5250_HOSTEHCICTRL_ENAINCR4 |
+		EXYNOS_5250_HOSTEHCICTRL_ENAINCR8 |
+		EXYNOS_5250_HOSTEHCICTRL_ENAINCR16;
+	writel(ehci, drv->reg_phy + EXYNOS_5250_HOSTEHCICTRL);
+
+	/* OHCI settings */
+	ohci = readl(drv->reg_phy + EXYNOS_5250_HOSTOHCICTRL);
+	/* Following code is based on the old driver */
+	ohci |=	0x1 << 3;
+	writel(ohci, drv->reg_phy + EXYNOS_5250_HOSTOHCICTRL);
+
+	/* Bypass PMU(Power Management Unit) Isolation */
+	regmap_update_bits(drv->reg_pmu,
+			EXYNOS_5433_USB_ISOL_HOST_OFFSET,
+			EXYNOS_5433_USB_ISOL_HOST,
+			EXYNOS_5433_USB_ISOL_HOST);
+
+	return 0;
+}
+
+static int exynos5433_power_off(struct samsung_usb2_phy_instance *inst)
+{
+	struct samsung_usb2_phy_driver *drv = inst->drv;
+	u32 ctrl0;
+	u32 hsic;
+
+	/* Enable PMU(Power Management Unit) Isolation */
+	regmap_update_bits(drv->reg_pmu,
+			EXYNOS_5433_USB_ISOL_HOST_OFFSET,
+			EXYNOS_5433_USB_ISOL_HOST,
+			(unsigned int)~(EXYNOS_5433_USB_ISOL_HOST));
+
+	switch (inst->cfg->id) {
+	case EXYNOS5433_HOST:
+		ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
+		ctrl0 |= (EXYNOS_5250_HOSTPHYCTRL0_SIDDQ |
+				EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND |
+				EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP |
+				EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST |
+				EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL);
+		writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
+		break;
+	case EXYNOS5433_HSIC:
+		hsic = (EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12 |
+				EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT |
+				EXYNOS_5250_HSICPHYCTRLX_SIDDQ |
+				EXYNOS_5250_HSICPHYCTRLX_FORCESLEEP |
+				EXYNOS_5250_HSICPHYCTRLX_FORCESUSPEND
+				);
+		writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL1);
+		writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL2);
+		break;
+	}
+
+	return 0;
+}
 
 static const struct samsung_usb2_common_phy exynos5250_phys[] = {
 	{
@@ -393,9 +505,31 @@ static const struct samsung_usb2_common_phy exynos5250_phys[] = {
 	},
 };
 
+static const struct samsung_usb2_common_phy exynos5433_phys[] = {
+	{
+		.label		= "host",
+		.id		= EXYNOS5433_HOST,
+		.power_on	= exynos5433_power_on,
+		.power_off	= exynos5433_power_off,
+	},
+	{
+		.label		= "hsic",
+		.id		= EXYNOS5433_HSIC,
+		.power_on	= exynos5433_power_on,
+		.power_off	= exynos5433_power_off
+	},
+};
+
 const struct samsung_usb2_phy_config exynos5250_usb2_phy_config = {
 	.has_mode_switch	= 1,
 	.num_phys		= EXYNOS5250_NUM_PHYS,
 	.phys			= exynos5250_phys,
 	.rate_to_clk		= exynos5250_rate_to_clk,
 };
+
+const struct samsung_usb2_phy_config exynos5433_usb2_phy_config = {
+	.has_mode_switch	= 0,
+	.num_phys		= EXYNOS5433_NUM_PHYS,
+	.phys			= exynos5433_phys,
+	.rate_to_clk		= exynos5250_rate_to_clk,
+};
diff --git a/drivers/phy/phy-samsung-usb2.c b/drivers/phy/phy-samsung-usb2.c
index 55b6994932e3..ff35bb49b80f 100644
--- a/drivers/phy/phy-samsung-usb2.c
+++ b/drivers/phy/phy-samsung-usb2.c
@@ -116,6 +116,10 @@ static const struct of_device_id samsung_usb2_phy_of_match[] = {
 		.compatible = "samsung,exynos5250-usb2-phy",
 		.data = &exynos5250_usb2_phy_config,
 	},
+	{
+		.compatible = "samsung,exynos5433-usb2-phy",
+		.data = &exynos5433_usb2_phy_config,
+	},
 #endif
 #ifdef CONFIG_PHY_S5PV210_USB2
 	{
diff --git a/drivers/phy/phy-samsung-usb2.h b/drivers/phy/phy-samsung-usb2.h
index 44bead9b8f34..bc78dd895bb4 100644
--- a/drivers/phy/phy-samsung-usb2.h
+++ b/drivers/phy/phy-samsung-usb2.h
@@ -67,5 +67,6 @@ extern const struct samsung_usb2_phy_config exynos3250_usb2_phy_config;
 extern const struct samsung_usb2_phy_config exynos4210_usb2_phy_config;
 extern const struct samsung_usb2_phy_config exynos4x12_usb2_phy_config;
 extern const struct samsung_usb2_phy_config exynos5250_usb2_phy_config;
+extern const struct samsung_usb2_phy_config exynos5433_usb2_phy_config;
 extern const struct samsung_usb2_phy_config s5pv210_usb2_phy_config;
 #endif