[U-Boot] [PATCH v2 1/2] usb: ehci: exynos: set/reset hsic phys

[Inderpal Singh]

From: Inderpal Singh <chander.kashyap at linaro.org>

The controller has 3 ports. The port0 is for USB 2.0 Phy, port1 and port2
are for HSIC phys. The usb 2.0 phy is already being setup. This patch
sets up the hsic phys.

Signed-off-by: Inderpal Singh <inderpal.singh at linaro.org>
---
 arch/arm/include/asm/arch-exynos/ehci.h |   14 +++++++++++
 drivers/usb/host/ehci-exynos.c          |   39 +++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/arch/arm/include/asm/arch-exynos/ehci.h b/arch/arm/include/asm/arch-exynos/ehci.h
index d79f25c..d2d70bd 100644
--- a/arch/arm/include/asm/arch-exynos/ehci.h
+++ b/arch/arm/include/asm/arch-exynos/ehci.h
@@ -29,6 +29,20 @@
 #define EHCICTRL_ENAINCR8			(1 << 27)
 #define EHCICTRL_ENAINCR16			(1 << 26)
 
+#define HSIC_CTRL_REFCLKSEL                     (0x2)
+#define HSIC_CTRL_REFCLKSEL_MASK                (0x3)
+#define HSIC_CTRL_REFCLKSEL_SHIFT               (23)
+
+#define HSIC_CTRL_REFCLKDIV_12                  (0x24)
+#define HSIC_CTRL_REFCLKDIV_MASK                (0x7f)
+#define HSIC_CTRL_REFCLKDIV_SHIFT               (16)
+
+#define HSIC_CTRL_SIDDQ                         (0x1 << 6)
+#define HSIC_CTRL_FORCESLEEP                    (0x1 << 5)
+#define HSIC_CTRL_FORCESUSPEND                  (0x1 << 4)
+#define HSIC_CTRL_UTMISWRST                     (0x1 << 2)
+#define HSIC_CTRL_PHYSWRST                      (0x1 << 0)
+
 /* Register map for PHY control */
 struct exynos_usb_phy {
 	unsigned int usbphyctrl0;
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 66b4de0..88e6466 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -88,6 +88,8 @@ static int exynos_usb_parse_dt(const void *blob, struct exynos_ehci *exynos)
 /* Setup the EHCI host controller. */
 static void setup_usb_phy(struct exynos_usb_phy *usb)
 {
+	u32 hsic_ctrl;
+
 	set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN);
 
 	set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN);
@@ -112,6 +114,32 @@ static void setup_usb_phy(struct exynos_usb_phy *usb)
 	clrbits_le32(&usb->usbphyctrl0,
 			HOST_CTRL0_LINKSWRST |
 			HOST_CTRL0_UTMISWRST);
+
+	/* HSIC Phy Setting */
+	hsic_ctrl = (HSIC_CTRL_FORCESUSPEND |
+			HSIC_CTRL_FORCESLEEP |
+			HSIC_CTRL_SIDDQ);
+
+	clrbits_le32(&usb->hsicphyctrl1, hsic_ctrl);
+	clrbits_le32(&usb->hsicphyctrl2, hsic_ctrl);
+
+	hsic_ctrl = (((HSIC_CTRL_REFCLKDIV_12 & HSIC_CTRL_REFCLKDIV_MASK)
+				<< HSIC_CTRL_REFCLKDIV_SHIFT)
+			| ((HSIC_CTRL_REFCLKSEL & HSIC_CTRL_REFCLKSEL_MASK)
+				<< HSIC_CTRL_REFCLKSEL_SHIFT)
+			| HSIC_CTRL_UTMISWRST);
+
+	setbits_le32(&usb->hsicphyctrl1, hsic_ctrl);
+	setbits_le32(&usb->hsicphyctrl2, hsic_ctrl);
+
+	udelay(10);
+
+	clrbits_le32(&usb->hsicphyctrl1, HSIC_CTRL_PHYSWRST |
+					HSIC_CTRL_UTMISWRST);
+
+	clrbits_le32(&usb->hsicphyctrl2, HSIC_CTRL_PHYSWRST |
+					HSIC_CTRL_UTMISWRST);
+
 	udelay(20);
 
 	/* EHCI Ctrl setting */
@@ -125,6 +153,8 @@ static void setup_usb_phy(struct exynos_usb_phy *usb)
 /* Reset the EHCI host controller. */
 static void reset_usb_phy(struct exynos_usb_phy *usb)
 {
+	u32 hsic_ctrl;
+
 	/* HOST_PHY reset */
 	setbits_le32(&usb->usbphyctrl0,
 			HOST_CTRL0_PHYSWRST |
@@ -133,6 +163,15 @@ static void reset_usb_phy(struct exynos_usb_phy *usb)
 			HOST_CTRL0_FORCESUSPEND |
 			HOST_CTRL0_FORCESLEEP);
 
+	/* HSIC Phy reset */
+	hsic_ctrl = (HSIC_CTRL_FORCESUSPEND |
+			HSIC_CTRL_FORCESLEEP |
+			HSIC_CTRL_SIDDQ |
+			HSIC_CTRL_PHYSWRST);
+
+	setbits_le32(&usb->hsicphyctrl1, hsic_ctrl);
+	setbits_le32(&usb->hsicphyctrl2, hsic_ctrl);
+
 	set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE);
 }
 
-- 
1.7.9.5