Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com ---
Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None
drivers/usb/dwc3/dwc3-generic.c | 85 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c index 169188c..b487f72 100644 --- a/drivers/usb/dwc3/dwc3-generic.c +++ b/drivers/usb/dwc3/dwc3-generic.c @@ -120,6 +120,90 @@ 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; @@ -259,6 +343,7 @@ 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 }, { } };