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

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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>
This commit is contained in:
Patrice Chotard
2017-07-18 11:38:41 +02:00
committed by Marek Vasut
parent b7c1c7d2ba
commit 576e3cc700
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/host/xhci-dwc3.c
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@@ -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);
}