[U-Boot] [PATCH V2 1/3] usb: ehci-mx6: implement ofdata_to_platdata

[Peng Fan]

Implement ofdata_to_platdata to set the type to host or device.
 - Check "dr-mode" property.
 - If there is no "dr-mode", check phy_ctrl for i.MX6
   and phy_status for i.MX7

Signed-off-by: Peng Fan <peng.fan at nxp.com>
Cc: Marek Vasut <marex at denx.de>
Cc: Simon Glass <sjg at chromium.org>
Cc: Stefano Babic <sbabic at denx.de>
---

V2:
  Add a ehci_usb_phy_mode function to check phy mode when dr-mode is otg,
  or no mode property provided.

 drivers/usb/host/ehci-mx6.c | 75 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 48889c1..18b7fc3 100644
--- a/drivers/usb/host/ehci-mx6.c
+++ b/drivers/usb/host/ehci-mx6.c
@@ -15,10 +15,13 @@
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/clock.h>
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/sys_proto.h>
 #include <dm.h>
 
 #include "ehci.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #define USB_OTGREGS_OFFSET	0x000
 #define USB_H1REGS_OFFSET	0x200
 #define USB_H2REGS_OFFSET	0x400
@@ -48,6 +51,7 @@
 #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS	0x00000040
 
 #define USBNC_OFFSET		0x200
+#define USBNC_PHY_STATUS_OFFSET	0x23C
 #define USBNC_PHYSTATUS_ID_DIG	(1 << 4) /* otg_id status */
 #define USBNC_PHYCFG2_ACAENB	(1 << 4) /* otg_id detection enable */
 #define UCTRL_PWR_POL		(1 << 9) /* OTG Polarity of Power Pin */
@@ -417,6 +421,76 @@ static const struct ehci_ops mx6_ehci_ops = {
 	.init_after_reset = mx6_init_after_reset
 };
 
+static int ehci_usb_phy_mode(struct udevice *dev)
+{
+	struct usb_platdata *plat = dev_get_platdata(dev);
+	void *__iomem addr = (void *__iomem)dev_get_addr(dev);
+	void *__iomem phy_ctrl, *__iomem phy_status;
+	const void *blob = gd->fdt_blob;
+	int offset = dev->of_offset, phy_off;
+	u32 val;
+
+	/*
+	 * About fsl,usbphy, Refer to
+	 * Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt.
+	 */
+	if (is_mx6()) {
+		phy_off = fdtdec_lookup_phandle(blob,
+						offset,
+						"fsl,usbphy");
+		if (phy_off < 0)
+			return -EINVAL;
+
+		addr = (void __iomem *)fdtdec_get_addr(blob, phy_off,
+						       "reg");
+		if ((fdt_addr_t)addr == FDT_ADDR_T_NONE)
+			return -EINVAL;
+
+		phy_ctrl = (void __iomem *)(addr + USBPHY_CTRL);
+		val = readl(phy_ctrl);
+
+		if (val & USBPHY_CTRL_OTG_ID)
+			plat->init_type = USB_INIT_DEVICE;
+		else
+			plat->init_type = USB_INIT_HOST;
+	} else if (is_mx7()) {
+		phy_status = (void __iomem *)(addr +
+					      USBNC_PHY_STATUS_OFFSET);
+		val = readl(phy_status);
+
+		if (val & USBNC_PHYSTATUS_ID_DIG)
+			plat->init_type = USB_INIT_DEVICE;
+		else
+			plat->init_type = USB_INIT_HOST;
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
+{
+	struct usb_platdata *plat = dev_get_platdata(dev);
+	const char *mode;
+
+	mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "dr_mode", NULL);
+	if (mode) {
+		if (strcmp(mode, "peripheral") == 0)
+			plat->init_type = USB_INIT_DEVICE;
+		else if (strcmp(mode, "host") == 0)
+			plat->init_type = USB_INIT_HOST;
+		else if (strcmp(mode, "otg") == 0)
+			return ehci_usb_phy_mode(dev);
+		else
+			return -EINVAL;
+
+		return 0;
+	}
+
+	return ehci_usb_phy_mode(dev);
+}
+
 static int ehci_usb_probe(struct udevice *dev)
 {
 	struct usb_platdata *plat = dev_get_platdata(dev);
@@ -460,6 +534,7 @@ U_BOOT_DRIVER(usb_mx6) = {
 	.name	= "ehci_mx6",
 	.id	= UCLASS_USB,
 	.of_match = mx6_usb_ids,
+	.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
 	.probe	= ehci_usb_probe,
 	.remove = ehci_deregister,
 	.ops	= &ehci_usb_ops,
-- 
2.6.2