[U-Boot] USB CDC branch

[Kyungmin Park]

On Wed, Jul 14, 2010 at 4:48 AM, Remy Bohmer <linux at bohmer.net> wrote:
> Hi,
>
> 2010/7/13 Vitaly Kuzmichev <vkuzmichev at mvista.com>:
>> FYI I'm doing some work on this branch too.
>
> Great!
>
>> Actually I have ported it to 2010.03
>
> What do you mean with ported to 2010.03?
> It was already working on latest git, do you mean you backported it to
> an older version? (I would not expect this would be a big difference
> though)
>
>> added RNDIS support
>
> Is RNDIS working stable? We had quite some troubles with it,
> especially with BSODs on those Windows boxes...
> The device unplug/plug behaviour was a pain for RNDIS, hence the
> reason why we removed that from the code.
> But, I do not want to scare you off from this rndis work, please
> continue. Maybe you can get it to work properly :-)
>
> We use it to communicate with a CDC driver on a Windows XP-embedded
> host (http://www.thesycon.de/eng/usb_cdcecm.shtml). CDC works much
> more stable, and much more faster compared to rndis.

We also implemented the CDC and RNDIS on our board and working well.
If you merge your usb gadget tree then we will send the patches also.

To Minkyu,
Can you prepare the patches and send to u-boot?

Thank you,
Kyungmin Park

>
>>  and made integration into 'usb' command.
>
> Great!
>
>> However these changes aren't tested yet so the work is still under progress.
>>
>> Probably someone knows about any possible issues with CDC/RNDIS support?
>
> See above.
> and CDC is working stable, no known issues with it.
>
> At least one hint: First get CDC working on your hardware before you
> start to connect rndis, that would allow you to get the udc driver and
> all other levels of SW working properly and that you would only need
> to focus on rndis protocol rarities after that. And to prevent that
> you are debugging all kinds of undocumented rndis calls from the
> Windows host you could use a Linux host instead with the
> Linux-rndis-usb-host driver  ;-)
>
>> And also I would like to know the answers to Stefano's questions.
>
> See my other reply.
>
> I would suggest to merge all work in progress in the u-boot-usb/CDC
> branch from which we push it to mainline.
>
>
> Kind regards,
>
> Remy
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
>