[U-Boot] Ethernet on PandaBoard

Gary Thomas
2012-07-12T13:27:57Z

On 2012-07-12 07:20, Tom Rini wrote:
> On Thu, Jul 12, 2012 at 07:17:59AM -0600, Gary Thomas wrote:
>> 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'
>
> Looks like omap4 doesn't have CONFIG_CMD_CACHE set, so indeed you're
> missing 'dcache off' as a command. The other one is to add
> CONFIG_SYS_DCACHE_OFF to omap4_panda.h (or omap4_common.h) and rebuild.
>

No difference, sorry.