On Fri, Jul 29, 2011 at 11:51:08AM -0400, Jason wrote:
On Thu, Jul 28, 2011 at 11:15:56PM +0400, Alexei Ozhigov wrote:
2011/7/28 Jason u-boot@lakedaemon.net:
On Thu, Jul 28, 2011 at 07:25:54PM +0400, Alexei Ozhigov wrote:
I tried running latest U-Boot on OpenRD Ultimate, and USB support appears to be broken:
Marvell>> usb reset
(Re)start USB...
USB: Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... EHCI timed out on TD - token=0x80008c80
2 USB Device(s) found
scanning bus for storage devices... 0 Storage Device(s) found
According to "git bisect" the patch which causes this behavior is c2dd0d45540397704de9b13287417d21049d34c6 (armv7: integrate cache maintenance support).
Did you try reverting this patch? ... Jason.
Yes, after reverting USB works all right, at least reading from USB flash works.
Great, that's a start. I've emailed the relevant folks and am waiting for a response as this is a little bit out of my depth.
Ok, I figured it out (or, rather, I googled it to death). Aneesh's patch is correct, but not all drivers are dcache aware. the Marvell/kirkwood usb driver is one of them. See here [1] for the explanation. All you need to do is add
#define CONFIG_SYS_DCACHE_OFF
to include/configs/openrd.h or similar. I'm testing right now on my side. Please test on yours to see if it works.
Thanks,
Jason.