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

Mans Rullgard mans.rullgard at
Thu Mar 15 13:26:03 UTC 2012

On 14 March 2012 20:04, Jannis Pohlmann <jannis.pohlmann at> wrote:
> Hi,
> I am currently playing with a couple of the development boards for which
> there are Linaro hwpacks and LEBs. Since what I am trying to do requires
> a lot of disk and network I/O, I've been paying special attention to the
> data transfer rates I can get out of these boards.
> Below is a brief summary of my findings.
> 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.  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.

Mans Rullgard / mru

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