dwc3-generic: Add support for the TI DWC3 glue

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index 6d9be9b2459648a095edd0b38006e2f582d1a299..bc6bba198e9ae6571d6aa16511bd14828770cbdf 100644 (file)
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -119,6 +119,90 @@ struct dwc3_glue_ops {
                               enum usb_dr_mode mode);
 };
 
+void dwc3_ti_select_dr_mode(struct udevice *dev, int index,
+                           enum usb_dr_mode mode)
+{
+#define USBOTGSS_UTMI_OTG_STATUS               0x0084
+#define USBOTGSS_UTMI_OTG_OFFSET               0x0480
+
+/* UTMI_OTG_STATUS REGISTER */
+#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE       BIT(31)
+#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT  BIT(9)
+#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE BIT(8)
+#define USBOTGSS_UTMI_OTG_STATUS_IDDIG         BIT(4)
+#define USBOTGSS_UTMI_OTG_STATUS_SESSEND       BIT(3)
+#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID     BIT(2)
+#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID     BIT(1)
+enum dwc3_omap_utmi_mode {
+       DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
+       DWC3_OMAP_UTMI_MODE_HW,
+       DWC3_OMAP_UTMI_MODE_SW,
+};
+
+       u32 use_id_pin;
+       u32 host_mode;
+       u32 reg;
+       u32 utmi_mode;
+       u32 utmi_status_offset = USBOTGSS_UTMI_OTG_STATUS;
+
+       struct dwc3_glue_data *glue = dev_get_platdata(dev);
+       void *base = map_physmem(glue->regs, 0x10000, MAP_NOCACHE);
+
+       if (device_is_compatible(dev, "ti,am437x-dwc3"))
+               utmi_status_offset += USBOTGSS_UTMI_OTG_OFFSET;
+
+       utmi_mode = dev_read_u32_default(dev, "utmi-mode",
+                                        DWC3_OMAP_UTMI_MODE_UNKNOWN);
+       if (utmi_mode != DWC3_OMAP_UTMI_MODE_HW) {
+               debug("%s: OTG is not supported. defaulting to PERIPHERAL\n",
+                     dev->name);
+               mode = USB_DR_MODE_PERIPHERAL;
+       }
+
+       switch (mode)  {
+       case USB_DR_MODE_PERIPHERAL:
+               use_id_pin = 0;
+               host_mode = 0;
+               break;
+       case USB_DR_MODE_HOST:
+               use_id_pin = 0;
+               host_mode = 1;
+               break;
+       case USB_DR_MODE_OTG:
+       default:
+               use_id_pin = 1;
+               host_mode = 0;
+               break;
+       }
+
+       reg = readl(base + utmi_status_offset);
+
+       reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SW_MODE);
+       if (!use_id_pin)
+               reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
+
+       writel(reg, base + utmi_status_offset);
+
+       reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSEND |
+               USBOTGSS_UTMI_OTG_STATUS_VBUSVALID |
+               USBOTGSS_UTMI_OTG_STATUS_IDDIG);
+
+       reg |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID |
+               USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
+
+       if (!host_mode)
+               reg |= USBOTGSS_UTMI_OTG_STATUS_IDDIG |
+                       USBOTGSS_UTMI_OTG_STATUS_VBUSVALID;
+
+       writel(reg, base + utmi_status_offset);
+
+       unmap_physmem(base, MAP_NOCACHE);
+}
+
+struct dwc3_glue_ops ti_ops = {
+       .select_dr_mode = dwc3_ti_select_dr_mode,
+};
+
 static int dwc3_glue_bind(struct udevice *parent)
 {
        const void *fdt = gd->fdt_blob;
@@ -258,6 +342,7 @@ static int dwc3_glue_remove(struct udevice *dev)
 
 static const struct udevice_id dwc3_glue_ids[] = {
        { .compatible = "xlnx,zynqmp-dwc3" },
+       { .compatible = "ti,dwc3", .data = (ulong)&ti_ops },
        { }
 };