linux-kernel - Re: Exynos5422 EHCI (USB 2.0) - Odroid XU4

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Date:   Mon, 30 Jan 2017 12:08:23 +0530
From:   Anand Moon <linux.amoon@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Kamil Debski <kamil@...as.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Kukjin Kim <kgene@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Linux USB Mailing List <linux-usb@...r.kernel.org>,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Felipe Balbi <balbi@...nel.org>,
        Richard Genoud <richard.genoud@...il.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Markus Reichl <m.reichl@...etechno.de>
Subject: Re: Exynos5422 EHCI (USB 2.0) - Odroid XU4 - port 1 resume error -110

Hi Krzysztof,

On 29 January 2017 at 19:05, Krzysztof Kozlowski <krzk@...nel.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

Download attachment "usbvbus.patch" of type "application/octet-stream" (3126 bytes)