Re: Investigating SD card failures

[Pierre Ossman]

On Fri, 27 Jul 2007 07:50:26 +0200
Manuel Lauss <mano@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi Pierre,
> 
> I have a 1GB SanDisk SD card here which linux does not recognize.
> Looking at the MMC debug output, I see the MMC core repeatedly
> issues CMD55/CMD41 commands (which all succeed!) then stops
> after 100 times.  In sd_ops.c the code checks for a bit to get set.
> My question is, what exactly is this bit supposed to indicate?
> 

That the card has initialized. Try extending the time that loop runs and see if the card powers up.

-- 
     -- 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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