How-to use the sdio driver?

[Lars Holowko]

>> Thanks Dan,
>>
>> For the hint concerning debug and the MMC bus. I don't see anything 
>> happening there with my wifi card.
>>
>> One source of the problem could be that the MMC slot seems to get 
>> scanned only at boot up. It only recognizes a SD card when it is 
>> already plugged in when the kernel gets booted but not if I plug it
in later.
>>
>> By that time the libertas module is not loaded yet. But when I 
>> configure libertas_sdio to be linked statically, I don't see any 
>> difference either...
>
> Which WiFi card are you using?
> Probably the WiFi card was not properly detected by your SDIO
controller.
> Make sure the configuration of your GPIO pin for card detection is
right.
> BTW, have you tried pre-plug in the WiFi card before power up the
board?
>

I am using a Marvell 88W8686 development board. It has a SD-card style
connector so I would assume that I won't have to modify any additional
GPIOs because it would use the same GPIOs as a SD-card in the same slot,
right? Pre-plugging the WiFi card does not work (no output other then
that the libertas driver was registered) - as opposed to the SD-card.

>> I also added a couple of printks in
>> drives/mmc/core/sdio_bus.c:sdio_bus_event and 
>> drives/mmc/core/sdio_bus.c:sdio_bus_probe but they never seem to get 
>> called either - neither with the SD card nor the wireless board. Do 
>> you know who is supposed to call those probe functions?

> sdio_bus_probe will be called by MMC/SDIO Stack once a SDIO function
and driver are matched on SDIO Bus.

May you point me where this sdio bus scanning/matching is happening? Is
it mmc_rescan in drivers/mmc/core/core.c ?


Regards,

Lars
 
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