[U-Boot] [linux-sunxi] Mainline U-Boot, EHCI, usbkbd not working (workaround)

[B.R. Oake <broake@openmailbox.org>]

(This started on the linux-sunxi mailing list but will hopefully be
of interest on the U-Boot list)

On 04/01/15 13:45, Lars Doelle wrote:
> while testing with mainline u-boot, I came over the
> problem, that the USB keyboard is not recognized.
> 
> The device is an A20-OLinuXIno-LIME2. I used the
> current A20-OLinuXino-Lime2_defconfig for building.
> 
> In my understanding, the issue should be reproducible
> with all devices having an EHCI root hub.
> 
> ---
> sun7i# usb reset
> (Re)start USB...
> USB0:   USB EHCI 1.00
> scanning bus 0 for devices... cannot reset port 1!?
> 1 USB Device(s) found
> USB1:   USB EHCI 1.00
> scanning bus 1 for devices... 1 USB Device(s) found
>        scanning usb for storage devices... 0 Storage Device(s) found
> sun7i# usb tree
> USB device tree:
>   1  Hub (480 Mb/s, 0mA)
>      u-boot EHCI Host Controller 
>    
>   2  Hub (480 Mb/s, 0mA)
>      u-boot EHCI Host Controller 
> ---
> 
> As a workaround, i plugged an USB hub in between:
> [...]


I also have this problem.  I've tried three different USB keyboards on
an A20-Olinuxino-Micro and a Banana Pi, and I always get that error
"cannot reset port N!?" where N is whichever USB socket I've plugged
it into, and U-Boot cannot see the keyboard.  Once Linux has loaded,
the keyboard works without any trouble.

Can anyone suggest what is causing this?

Thank you,
B.R. Oake.