linux-kernel - Re: TR: Neep help with my MMC driver ...

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Message-ID: <20070720160036.581f8fba@poseidon.drzeus.cx>
Date:	Fri, 20 Jul 2007 16:00:36 +0200
From:	Pierre Ossman <drzeus-mmc@...eus.cx>
To:	s@...eus.cx
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: TR: Neep help with my MMC driver ...

On Fri, 20 Jul 2007 15:44:18 +0200
"Pierre Savary" <pierre.savary@...link.fr> wrote:

> Hi,
> 
>  
> 
> I permit me to send you a mail because I've seen on the net that you
> have work around MMC.

Well, I am the maintainer ;)

Also, you should include the LKML for these discussions.

> 
> Linux 2.6.21+patch.AT91 run on my AT91sam9260. I must use the MMC.
> But it doesn't work . and I try since the begin of this week !!!!!!!!
> This is what I do :
> 
>  

*snip*

> 
> $ mknod /dev/mmc b 254 0
> 

Make sure this is the correct major. You can find it in /proc/devices.

*snip*

> 
> Sending command 1 as 00001041, arg = 00000000, blocks = 0, length = 0
> (MR = 00008384)
> 
> setting ier to 00000001
> 
> MCI irq: status = 0001C0E4, C07F0001, 00010000
> 
> MMC: Response index error
> 
> Completed command
> 
> Status = 0009C0E4 [00000000 00000000 00000000 00000000]
> 
> Error detected and set to 4 (cmd = 1, retries = 0)
> 
> mmc0: req done (CMD1): 4/0/0: 00000000 00000000 00000000 00000000
> 
> mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
> 
> MMC: Setting controller bus width to 1
> 

All your commands are failing, oddly enough with "response index
error". I'm not familiar with the AT91 controller, so I'm adding
Nicolas Ferre, the AT91 maintainer, to this discussion.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org
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