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Re: au1xmmc.c: does it work?

To: Freddy Spierenburg <freddy@dusktilldawn.nl>
Subject: Re: au1xmmc.c: does it work?
From: Manuel Lauss <mano@roarinelk.homelinux.net>
Date: Mon, 20 Nov 2006 13:01:48 +0100
Cc: linux-mips@linux-mips.org
In-reply-to: <20061120104922.GC32045@dusktilldawn.nl>
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References: <20061120094053.GA13509@roarinelk.homelinux.net> <20061120104922.GC32045@dusktilldawn.nl>
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Hi Freddy,

On Mon, Nov 20, 2006 at 11:49:22AM +0100, Freddy Spierenburg wrote:
> On Mon, Nov 20, 2006 at 10:40:53AM +0100, Manuel Lauss wrote:
> > I insert a known working card, and the mmc cmd trace suggests
> > CMD9 (send CSD) times out.
> 
> Are you working with a real MMC card or with an SD-card?

SD cards so far. MMC seems broken in a different way.

> I myself am not able to get several SD-cards working, even though
> SD-cards should be able to talk the MMC-protocol (AFAIK).

From what I understand, SD is a superset of the MMC command set.

> What I do have is several MMC-cards working properly, but I have
> to add a small side note. I am using the AU1100 processor on our
> own designed board. This AU1100 processor has a different DMA
> controller than the AU1200 and AU1500. 

It does not get so far to actually transfer data

> If you have trouble with MMC-cards too I'm more than willing to
> send you the patch, but it probably needs some tweaking on your
> part. That's why I do not yet attach it to this mail. Just ask
> me personally for it if you want to try it out.

Yes, please. I'd like to give it a spin
 
> > Before I go about to trace the problem I'd like to know if
> > other people see this problem too or if it's specific to my
> > system.
> 
> With the SD-cards the driver indeed got no answer on the CMD9
> request. So yes, I have the same problem on the AU1100 with the
> 2.6.16 kernel.

I'll see what I can do ti fix this.

Thanks,

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