(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.