Re: mwifiex_sdio on chromebook

["Arend van Spriel" <arend-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>]

On 11/05/2013 09:38 AM, Alexander Varnin wrote:
> 04.11.2013 23:46, Bing Zhao пишет:
>> Hi Alexander,
>>
>>>> Your Chromebook supports SDIO high speed mode (SDIO 2.0 spec). So
>>>> 50MHz is correct.
>>> Ok, but mainline kernel doesn't try this frequency. It tries 400kHz at
>>> most.
>>>
>>>> What are you trying to do here? Are you trying to run a mainline kernel on your Chromebook?
>>> Yes. I've got kernel 3.4 from Google Chrome OS. It works ok for
>>> mwifiex_sdio. But I want to run mainline kernel. As of 3.11 it is able
>>> to boot on Chromebook, but WiFi doesn't work.
>> I don't know why you want to do that, but the mainline kernel won't work on your Chromebook unless you port all platform specific changes over from chromeos-3.4 tree.
>>
>>>> You said mmc_attach_sdio function fails. The mwifiex_sdio driver and
>>>> the firmware will not be loaded at all.
>>> Ok, that is clear.
>>>
>>>> CONFIG_MMC_DEBUG=y, and collect the debug logs.
>>> This way seems not very useful, because there is also internal and
>>> external storage on mmc bus, so log quickly get garbaged with it. Dmesg
>>> seems to be overflowed and forgets early initialization. I have made a
>>> dirty hack to collect some useful info about initialization. I am
>>> attaching it. Please check, if I need to add something. Will it be
>>> useful this way?
>> As said above, this won’t work because the Chromebook specific changes aren't present in mainline kernel. Anyway you can take a look at the chromium OS developer guide.
>>
>> http://www.chromium.org/chromium-os/developer-guide
>>
>> Thanks,
>> Bing
>>
>
> It is ported at most already and mainline kernel works good on
> Chromebook. It is just peripheral problem.

Not sure how chromium os architecture looks like, but you mean to say 
*you* ported code in chromium user-space to work with upstream/mainline 
kernel API's?

Regards,
Arend

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