[U-Boot] Ethernet on PandaBoard

Tom Rini
2012-07-12T13:15:01Z

On Thu, Jul 12, 2012 at 07:06:02AM -0600, Gary Thomas wrote:
> On 2012-07-12 03:30, Tom Rini wrote:
> >On Thu, Jul 12, 2012 at 02:20:18AM -0700, Tom Rini wrote:
> >>On Wed, Jul 11, 2012 at 07:08:50AM -0600, Gary Thomas wrote:
> >>
> >>>I just tried rev 211e47549b668c7cdd8658c0413a272f0d0495d4 (v2012.07-rc1)
> >>>for my PandaBoard. Sadly, this is failing when I try to use the onboard
> >>>ethernet (EHCI USB based) controller:
> >>
> >>Sorry for the late response, at a conference. This is a known problem
> >>and we will either have this fixed soon (Ilya Yanok is working on a
> >>series) or we will build-time disable dcache support on these boards and
> >>fix this properly for the next release.
> >>
> >>In short, some cache clean-ups in ehci-hcd.c exposed other cache
> >>problems on other platforms where our cache size is 64 not 32bytes.
> >
> >I take it back, I forgot omap4 is 32byte cache. With the fix that
> >Tetsuyuki Kobayashi pointed you at (oh, and a Tested-by to that thread
> >if you can), can you please do a little stress testing of USB, to make
> >sure things are otherwise really happy (eth and perhaps a USB stick)?
> >Thanks alot!
> >
>
> Yesterday, this was working great. This morning, when I turned on
> the board, it can no longer find anything on the USB bus - nothing at
> all. This also applies to Linux when I boot from SD. I'm really
> confused :-(
>
> If I boot the board using the 2011.06 U-Boot, all is happy again.
> It looks like the USB HUB (USB3320) seems to be stuck in reset when
> I use the latest U-Boot.
>
> Ever hear of any problems like this?

How about if you turn the dcache off at run or build time?

--
Tom