MLK-13450-14 ehci-mx6: Update EHCI driver to support OTG0 on i.MX7ULP

The ULP has two USB controllers. These two controllers have similar NC
registers layout as i.MX7D. But OTG0 uses UTMI PHY simliar as i.MX6, not
the integrated PHY on i.MX7D. The OTG1 needs off-chip HSIC PHY or ULPI PHY
to work.

This patch only supports OTG0 with UTMI PHY.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 1ac22cabb96a14ac4ca58df60ae2025fb5e94db6)

2 files changed, 42 insertions, 15 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 5129a57..7e76f19 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -88,7 +88,7 @@ config USB_EHCI_MARVELL
 
 config USB_EHCI_MX6
 	bool "Support for i.MX6 on-chip EHCI USB controller"
-	depends on ARCH_MX6
+	depends on ARCH_MX6 || ARCH_MX7ULP
 	default y
 	---help---
 	  Enables support for the on-chip EHCI controller on i.MX6 SoCs.
@@ -100,7 +100,7 @@ config USB_EHCI_MX7
 	---help---
 	  Enables support for the on-chip EHCI controller on i.MX7 SoCs.
 
-if USB_EHCI_MX7
+if USB_EHCI_MX7 || USB_EHCI_MX6
 
 config MXC_USB_OTG_HACTIVE
 	bool "USB Power pin high active"
diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index db9748e..969e44a 100644
--- a/drivers/usb/host/ehci-mx6.c
+++ b/drivers/usb/host/ehci-mx6.c
@@ -64,10 +64,12 @@ DECLARE_GLOBAL_DATA_PTR;
 #define UCMD_RUN_STOP           (1 << 0) /* controller run/stop */
 #define UCMD_RESET		(1 << 1) /* controller reset */
 
-#if defined(CONFIG_MX6)
+#if defined(CONFIG_MX6) || defined(CONFIG_MX7ULP)
 static const unsigned phy_bases[] = {
 	USB_PHY0_BASE_ADDR,
+#if defined(USB_PHY1_BASE_ADDR)
 	USB_PHY1_BASE_ADDR,
+#endif
 };
 
 static void usb_internal_phy_clock_gate(int index, int on)
@@ -84,6 +86,20 @@ static void usb_internal_phy_clock_gate(int index, int on)
 
 static void usb_power_config(int index)
 {
+#if defined(CONFIG_MX7ULP)
+	struct usbphy_regs __iomem *usbphy =
+		(struct usbphy_regs __iomem *)USB_PHY0_BASE_ADDR;
+
+	if (index > 0)
+		return;
+
+	writel(ANADIG_USB2_CHRG_DETECT_EN_B |
+		   ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B,
+		   &usbphy->usb1_chrg_detect);
+
+	scg_enable_usb_pll(true);
+
+#else
 	struct anatop_regs __iomem *anatop =
 		(struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
 	void __iomem *chrg_detect;
@@ -123,6 +139,8 @@ static void usb_power_config(int index)
 		     ANADIG_USB2_PLL_480_CTRL_POWER |
 		     ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS,
 		     pll_480_ctrl_set);
+
+#endif
 }
 
 /* Return 0 : host node, <>0 : device mode */
@@ -186,6 +204,14 @@ int usb_phy_mode(int port)
 		return USB_INIT_HOST;
 }
 
+#if defined(CONFIG_MX7ULP)
+struct usbnc_regs {
+	u32 ctrl1;
+	u32 ctrl2;
+	u32 reserve0[2];
+	u32 hsic_ctrl;
+};
+#else
 /* Base address for this IP block is 0x02184800 */
 struct usbnc_regs {
 	u32	ctrl[4];	/* otg/host1-3 */
@@ -194,6 +220,8 @@ struct usbnc_regs {
 	u32	otg_phy_ctrl_0;
 	u32	uh1_phy_ctrl_0;
 };
+#endif
+
 #elif defined(CONFIG_MX7)
 struct usbnc_regs {
 	u32 ctrl1;
@@ -214,20 +242,12 @@ static void usb_power_config(int index)
 	struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
 			(0x10000 * index) + USBNC_OFFSET);
 	void __iomem *phy_cfg2 = (void __iomem *)(&usbnc->phy_cfg2);
-	void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1);
 
 	/*
 	 * Clear the ACAENB to enable usb_otg_id detection,
 	 * otherwise it is the ACA detection enabled.
 	 */
 	clrbits_le32(phy_cfg2, USBNC_PHYCFG2_ACAENB);
-
-	/* Set power polarity to high active */
-#ifdef CONFIG_MXC_USB_OTG_HACTIVE
-	setbits_le32(ctrl, UCTRL_PWR_POL);
-#else
-	clrbits_le32(ctrl, UCTRL_PWR_POL);
-#endif
 }
 
 int usb_phy_mode(int port)
@@ -252,7 +272,7 @@ static void usb_oc_config(int index)
 	struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
 			USB_OTHERREGS_OFFSET);
 	void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl[index]);
-#elif defined(CONFIG_MX7)
+#elif defined(CONFIG_MX7) || defined(CONFIG_MX7ULP)
 	struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
 			(0x10000 * index) + USBNC_OFFSET);
 	void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1);
@@ -266,6 +286,13 @@ static void usb_oc_config(int index)
 #endif
 
 	setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
+
+	/* Set power polarity to high active */
+#ifdef CONFIG_MXC_USB_OTG_HACTIVE
+	setbits_le32(ctrl, UCTRL_PWR_POL);
+#else
+	clrbits_le32(ctrl, UCTRL_PWR_POL);
+#endif
 }
 
 /**
@@ -329,7 +356,7 @@ int ehci_mx6_common_init(struct usb_ehci *ehci, int index)
 	usb_power_config(index);
 	usb_oc_config(index);
 
-#if defined(CONFIG_MX6)
+#if defined(CONFIG_MX6) || defined(CONFIG_MX7ULP)
 	usb_internal_phy_clock_gate(index, 1);
 	usb_phy_enable(index, ehci);
 #endif
@@ -344,7 +371,7 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 	enum usb_init_type type;
 #if defined(CONFIG_MX6)
 	u32 controller_spacing = 0x200;
-#elif defined(CONFIG_MX7)
+#elif defined(CONFIG_MX7) || defined(CONFIG_MX7ULP)
 	u32 controller_spacing = 0x10000;
 #endif
 	struct usb_ehci *ehci = (struct usb_ehci *)(USB_BASE_ADDR +
@@ -452,7 +479,7 @@ static int ehci_usb_phy_mode(struct udevice *dev)
 	 * About fsl,usbphy, Refer to
 	 * Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt.
 	 */
-	if (is_mx6()) {
+	if (is_mx6() || is_mx7ulp()) {
 		phy_off = fdtdec_lookup_phandle(blob,
 						offset,
 						"fsl,usbphy");