From: Patrice Chotard <patrice.chotard@st.com>
Date: Tue, 18 Jul 2017 09:38:41 +0000 (+0200)
Subject: usb: host: xhci-dwc3: Add dual role mode support from DT
X-Git-Tag: v2017.09-rc1~32^2~58
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=576e3cc700c598487fed741ee85103373a3f69d6;p=platform%2Fkernel%2Fu-boot.git

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 fb106f3..93ae986 100644
--- 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);
 }