Re: [Gumstix-users] USB Host port on Toby

[Sam B. <sa...@m5...>]

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On 12/05/10 6:19 AM, Steve Sakoman wrote:
> On Tue, May 11, 2010 at 12:17 PM, Chad Lester <cha...@gm...> wrote:
>>
>> Hello - I just joined the list and am having the same problem with my USB
>> host port on the Toby that was described by Chris on 1/26.
> 
> This has been covered on the list a number of times, but for those who
> missed it:
> 
> The host (EHCI) port on OMAP3 directly supports only high speed
> devices.  If you want to use a low or full speed device you *must* use
> an external hub.
> 
> This is true whether your board has a mini or standard A connector.
> 
> Steve

Hi Steve,

I'll jump in on this thread because I'm having exactly the same problem
as Chad and Chris, and it definitely happens with high-speed (USB 2.0)
devices. I've tested with a D-Link DUB-E100 and a high-speed memory key.

(I'm using an Overo Earth and a Tobi board.)

I get the same messages that Chris lists in his original post and I've
tried several recent pre-builds and also bitbaked my own kernel; all
with the same results.

In addition, once the port suspends (which is shortly after booting,
according to dmesg) it never wakes up again and no kernel messages are
ever produced. I have to pull the power to get it to activate again.
Someone in the original thread mentions having to disable USB suspend in
the kernel config so I'll try that but I doubt that it will fix the
original issue.

The last message in that original thread indicates that he had to buy
either a new Toby board, or a whole new Overo (it's not clear which),
because the USB port was "borked". Is this a board defect? I wonder if
we can get replacements or repair it somehow?

Chad, any update with your board?

Anyone else with similar boards: do the host USB ports work? Any idea
how we could diagnose the problem? (Just knowing if it was hardware or a
driver issue would be a great start.)

Sam.
- -- 
Sam Bobroff | sa...@m5... | M5 Networks
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