Hi Krzysztof,

On 29 January 2017 at 19:05, Krzysztof Kozlowski <krzk@kernel.org> wrote:
> Hi,
>
> On Odroid XU4 with an external usb2514 hub (evaluation board from SMSC
> or TI) connected to the USB2.0 port of EHCI controller, whenever I
> plug some USB device into the usb2514 hub I see errors like:
> [   73.969179] exynos-ehci 12110000.usb: port 1 resume error -110
> [   74.003259] usb 1-1: USB disconnect, device number 2
> [   74.017432] usb usb1-port1: cannot reset (err = -32)
> [   74.021141] usb usb1-port1: cannot reset (err = -32)
> [   74.026832] usb usb1-port1: cannot reset (err = -32)
> [   74.030974] usb usb1-port1: cannot reset (err = -32)
> [   74.036677] usb usb1-port1: cannot reset (err = -32)
> [   74.041919] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
> [   74.140923] usb usb1-port1: unable to enumerate USB device
>
> Flooding the console. USB device does not work.
>
> Tested:
> 1. next-20170125,
> 2. mainline v4.10-rc5-393-g53cd1ad1a68f,
> 3. Hardkernel vendor kernel 3.10
>
>
> It does not look like an issue of usb2514 but rather a combination of
> usb2514 + Exynos EHCI because:
> 1. Happens only when usb2514 hub is directly connected to the USB2.0
> port of EHCI controller.
> 2. If usb2514 is connected through other hub (like to other ports on
> the board) - everything works fine.
> 3. I tested two different usb2514 hubs - one from TI, second from
> SMSC. Both behave the same.
> 4. I had the same issue on DWC3 controller (USB 3.0 port) and in that
> case helped ENABLING bits DWC3_GUSB2PHYCFG_SUSPHY and
> DWC3_GUSB3PIPECTL_SUSPHY which is I think equal to disabling the
> snps,dis_u3_susphy_quirk quirks.
>
>
> It seems that issue is strictly related to Exynos5422 USB 2.0 driver
> (phy?) and this hub. The drivers involved:
>  - drivers/phy/phy-exynos5250-usb2.c
>  - drivers/phy/phy-samsung-usb2.c
>  - drivers/usb/host/ehci-exynos.c
>
> Any ideas?
>
> Best regards,
> Krzysztof

I feel vbus input configuration is missing in the OdroidXU4.
for both ehci 2.0 port and dwc3 controller.

id-gpio and vbus-gpio configuration is also missing.

I am just attaching small changes from my side but it's not working
correctly at my end.

-Best Regards
-Anand