[PATCH] usb: phy: samsung: Add support HSIC on Exynos4X12

[Dongjin Kim <tobetter@gmail.com>]

This patch adds to enable High Speed Inter Chip on Exynos4X12. Both channels
are controlled by usbphy driver based on the patch series of usbphy driver
submitted by Tomasz Figa.

[1] https://patchwork.kernel.org/patch/2576121
[2] https://patchwork.kernel.org/patch/2576131
[3] https://patchwork.kernel.org/patch/2576141
[4] https://patchwork.kernel.org/patch/2576151
[5] https://patchwork.kernel.org/patch/2576161
[6] https://patchwork.kernel.org/patch/2576171

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/usb/phy/phy-samsung-usb.c  |    5 +++++
 drivers/usb/phy/phy-samsung-usb.h  |   10 ++++++++++
 drivers/usb/phy/phy-samsung-usb2.c |   13 +++++++++++--
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/phy/phy-samsung-usb.c b/drivers/usb/phy/phy-samsung-usb.c
index 7a1ed90..ac025ca 100644
--- a/drivers/usb/phy/phy-samsung-usb.c
+++ b/drivers/usb/phy/phy-samsung-usb.c
@@ -100,6 +100,11 @@ void samsung_usbphy_set_isolation_4210(struct samsung_usbphy *sphy, bool on)
 		reg_val |= en_mask;
 
 	writel(reg_val, reg);
+
+	if (sphy->drv_data->cpu_type == TYPE_EXYNOS4X12) {
+		writel(reg_val, sphy->pmuregs + EXYNOS4X12_PHY_HSIC_CTRL0);
+		writel(reg_val, sphy->pmuregs + EXYNOS4X12_PHY_HSIC_CTRL1);
+	}
 }
 EXPORT_SYMBOL_GPL(samsung_usbphy_set_isolation_4210);
 
diff --git a/drivers/usb/phy/phy-samsung-usb.h b/drivers/usb/phy/phy-samsung-usb.h
index 585d12f..68771bf 100644
--- a/drivers/usb/phy/phy-samsung-usb.h
+++ b/drivers/usb/phy/phy-samsung-usb.h
@@ -47,6 +47,16 @@
 #define RSTCON_HLINK_SWRST			(0x1 << 1)
 #define RSTCON_SWRST				(0x1 << 0)
 
+/* EXYNOS4X12 */
+#define EXYNOS4X12_PHY_HSIC_CTRL0		(0x04)
+#define EXYNOS4X12_PHY_HSIC_CTRL1		(0x08)
+
+#define PHYPWR_NORMAL_MASK_HSIC1		(0x7 << 12)
+#define PHYPWR_NORMAL_MASK_HSIC0		(0x7 << 9)
+#define PHYPWR_NORMAL_MASK_PHY1			(0x7 << 6)
+
+#define RSTCON_HOSTPHY_SWRST			(0xf << 3)
+
 /* EXYNOS5 */
 #define EXYNOS5_PHY_HOST_CTRL0			(0x00)
 
diff --git a/drivers/usb/phy/phy-samsung-usb2.c b/drivers/usb/phy/phy-samsung-usb2.c
index 03180c0..1011c16 100644
--- a/drivers/usb/phy/phy-samsung-usb2.c
+++ b/drivers/usb/phy/phy-samsung-usb2.c
@@ -176,8 +176,12 @@ static void samsung_usb2phy_enable(struct samsung_usbphy *sphy)
 		phypwr &= ~PHYPWR_NORMAL_MASK;
 		rstcon |= RSTCON_SWRST;
 		break;
-	case TYPE_EXYNOS4210:
 	case TYPE_EXYNOS4X12:
+		phypwr &= ~(PHYPWR_NORMAL_MASK_HSIC0 |
+				PHYPWR_NORMAL_MASK_HSIC1 |
+				PHYPWR_NORMAL_MASK_PHY1);
+		rstcon |= RSTCON_HOSTPHY_SWRST;
+	case TYPE_EXYNOS4210:
 		phypwr &= ~PHYPWR_NORMAL_MASK_PHY0;
 		rstcon |= RSTCON_SWRST;
 	default:
@@ -190,6 +194,8 @@ static void samsung_usb2phy_enable(struct samsung_usbphy *sphy)
 	/* reset all ports of PHY and Link */
 	writel(rstcon, regs + SAMSUNG_RSTCON);
 	udelay(10);
+	if (sphy->drv_data->cpu_type == TYPE_EXYNOS4X12)
+		rstcon &= ~RSTCON_HOSTPHY_SWRST;
 	rstcon &= ~RSTCON_SWRST;
 	writel(rstcon, regs + SAMSUNG_RSTCON);
 }
@@ -240,8 +246,11 @@ static void samsung_usb2phy_disable(struct samsung_usbphy *sphy)
 	case TYPE_S3C64XX:
 		phypwr |= PHYPWR_NORMAL_MASK;
 		break;
-	case TYPE_EXYNOS4210:
 	case TYPE_EXYNOS4X12:
+		phypwr |= (PHYPWR_NORMAL_MASK_HSIC0 |
+				PHYPWR_NORMAL_MASK_HSIC1 |
+				PHYPWR_NORMAL_MASK_PHY1);
+	case TYPE_EXYNOS4210:
 		phypwr |= PHYPWR_NORMAL_MASK_PHY0;
 	default:
 		break;
-- 
1.7.9.5