Slow/broken USB and Ethernet on Snowballs/Origen boards?

Jannis Pohlmann jannis.pohlmann at codethink.co.uk
Thu Mar 15 14:59:48 UTC 2012


Hey,

On 03/15/2012 01:26 PM, Mans Rullgard wrote:
> On 14 March 2012 20:04, Jannis Pohlmann <jannis.pohlmann at codethink.co.uk> wrote:
>> 3) Origen
>>
>>  * the internal USB hub runs at Full Speed (12 MBit/s), resulting in a
>>    maximum USB disk I/O of 1.5 MByte/s
>>
>>  * since the board does not feature Ethernet itself, I tried to attach
>>    a USB Ethernet controller to it, but of course the transfer rate
>>    through that is by the I/O upper limit of the USB hub
>>
>>  * I did not test wireless but it is not feasible for what I am trying
>>    to do anyway
> 
> Which kernel version are you using on the Origen?  I noticed the same problem
> a while back, but it appears to have been fixed in the Samsung landing team
> tree. 

Here's the output of 'uname -a':

  Linux linaro-developer 3.2.0-1000-origen #0samsung14-Ubuntu SMP
  PREEMPT Wed Jan 11 18:56:28 UTC 2012 armv7l armv7l armv7l GNU/Linux

Got the kernel from

  http://snapshots.linaro.org/oneiric/lt-origen-oneiric/20120313/1/

> There is still another bug present in the Origen kernel preventing
> USB-ethernet working with EHCI.  Some patches have been posted, but they have
> not made it into the trees yet.  Search the mailing lists for s5p usb burst
> to find them.

Is there any estimate on when this (them being merged into the landing
team trees) might happen?

  - Jannis



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