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>
Signed-off-by: Fabio Estevam <festevam@gmail.com>

1 files changed, 40 insertions, 13 deletions

diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 7d46091f94..1993ad620a 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 */
@@ -185,6 +203,14 @@ 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 */
@@ -193,6 +219,8 @@ struct usbnc_regs {
 	u32	otg_phy_ctrl_0;
 	u32	uh1_phy_ctrl_0;
 };
+#endif
+
 #elif defined(CONFIG_MX7)
 struct usbnc_regs {
 	u32 ctrl1;
@@ -213,20 +241,12 @@ 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)
@@ -251,7 +271,7 @@ 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);
@@ -265,6 +285,13 @@ 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
 }
 
 /**
@@ -328,7 +355,7 @@ 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
@@ -343,7 +370,7 @@ 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 +
@@ -446,7 +473,7 @@ 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");