usb: host: xhci-dwc3: Add dual role mode support from DT

DWC3 dual role mode is selected using DT "dr_mode"
property. If not found, DWC3 controller is configured
in HOST mode by default

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index fb106f328a5bd312c3559725933c601737a4f194..93ae986b4d789453d4d0c48e95821286d73af77b 100644 (file)
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -15,6 +15,7 @@
 #include "xhci.h"
 #include <asm/io.h>
 #include <linux/usb/dwc3.h>
+#include <linux/usb/otg.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -110,6 +111,7 @@ static int xhci_dwc3_probe(struct udevice *dev)
        struct xhci_hcor *hcor;
        struct xhci_hccr *hccr;
        struct dwc3 *dwc3_reg;
+       enum usb_dr_mode dr_mode;
 
        hccr = (struct xhci_hccr *)devfdt_get_addr(dev);
        hcor = (struct xhci_hcor *)((phys_addr_t)hccr +
@@ -119,6 +121,13 @@ static int xhci_dwc3_probe(struct udevice *dev)
 
        dwc3_core_init(dwc3_reg);
 
+       dr_mode = usb_get_dr_mode(dev_of_offset(dev));
+       if (dr_mode == USB_DR_MODE_UNKNOWN)
+               /* by default set dual role mode to HOST */
+               dr_mode = USB_DR_MODE_HOST;
+
+       dwc3_set_mode(dwc3_reg, dr_mode);
+
        return xhci_register(dev, hccr, hcor);
 }