[Solved] Re: Freescale i.mx25 SDIO/Libertas issue

Andre Renaud andre at bluewatersys.com
Wed Jun 1 18:41:02 EDT 2011

Hello Zamek,

> 05/31/2011 04:14 AM keltezéssel, Andre Renaud írta:
>> If I enable the libertas debugging details, I get some more information:
>> This seems to imply that the unit is correctly loading the firmware, and
>> then when it determines that the firmware has loaded, and tries to issue
>> the CMD_FUNC_INIT command, this times out.
>> Can anyone explain how I can begin debugging this, or confirm if they've
>> had this operate on the sdhci-esdhc-imx controller present in the i.MX25?
> I got same errors with 2.6.31 kernel. As I suggested earlier use 2.6.35
> from Freescale.
> git clone http://opensource.freescale.com/pub/scm/imx/linux-2.6-imx.git
> cd linux-2.6-imx
> git checkout rel_imx_2.6.35_11.04.01
> copy .config from your 2.6.31
> make ARCH=arm oldconfig
> make ARCH=arm menuconfig
> It works for me well.
> Is your wifi card hard wired or plugined?

Thanks for that information - using that kernel branch I have had it all
working properly, on both an 8686 and 8688 Marvell SDIO device. These
are both external (plugged in).

I was hoping to do a git bisect to determine where the fault lay,
however it seems that the imx tree uses a completely different SDIO
driver. I have validated the Libertas driver on a different CPU (atmel)
from the same kernel, so I'm assuming at this stage that the fault lies
in the SDIO driver in the current Linux mainline.


Bluewater Systems - An Aiotec Company

Andre Renaud        		
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