usb: ehci-mx6: implement ofdata_to_platdata

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@nxp.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefano Babic <sbabic@denx.de>

diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 48889c19562b0b91bc006cc109e5ea5688fdd4ba..18b7fc3c9520bb662667eef6e35e495327b179cd 100644 (file)
--- 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,