[U-Boot] Ethernet on PandaBoard

[Gary Thomas <gary@mlbassoc.com>]

On 2012-07-12 07:15, Tom Rini wrote:
> 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?
>

Sorry for being thick, but how do I do that?  I don't see any
cache manipulation commands in 'help'

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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