leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

usb: dwc2: disable erroneous overcurrent condition

Browse Source 
For the case where an external VBUS is used, we should enable the external
VBUS comparator in the driver. This would prevent an unnecessary overcurrent
error which would then disable the host port.

The overcurrent condition was happening on the SoCFPGA Cyclone5 devkit, thus
USB was not working on the devkit. This patch fixes that problem.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
This commit is contained in:
Dinh Nguyen 2016-03-04 18:57:04 -06:00 committed by Marek Vasut
parent 8038f6d288
commit b5ab663a69
2 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/host/dwc2.c
View File

@ -263,7 +263,9 @@ static void dwc_otg_core_init(struct dwc2_core_regs *regs)
/* Program the ULPI External VBUS bit if needed */
#ifdef CONFIG_DWC2_PHY_ULPI_EXT_VBUS
usbcfg |= DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV;
usbcfg |= (DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV |
DWC2_GUSBCFG_ULPI_INT_VBUS_INDICATOR |
DWC2_GUSBCFG_INDICATOR_PASSTHROUGH);
#else
usbcfg &= ~DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV;
#endif

2
drivers/usb/host/dwc2.h
View File

@ -152,6 +152,8 @@ struct dwc2_core_regs {
#define DWC2_GUSBCFG_ULPI_INT_VBUS_INDICATOR_OFFSET 21
#define DWC2_GUSBCFG_TERM_SEL_DL_PULSE (1 << 22)
#define DWC2_GUSBCFG_TERM_SEL_DL_PULSE_OFFSET 22
#define DWC2_GUSBCFG_INDICATOR_PASSTHROUGH (1 << 24)
#define DWC2_GUSBCFG_INDICATOR_PASSTHROUGH_OFFSET 24
#define DWC2_GUSBCFG_IC_USB_CAP (1 << 26)
#define DWC2_GUSBCFG_IC_USB_CAP_OFFSET 26
#define DWC2_GUSBCFG_IC_TRAFFIC_PULL_REMOVE (1 << 27)