From: Pierre Ossman <drzeus-list@drzeus.cx>
To: Eugene Ilkov <e.ilkov@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.20 mmc: problem with highspeed SD card
Date: Thu, 15 Feb 2007 06:48:12 +0100 [thread overview]
Message-ID: <45D3F41C.3020600@drzeus.cx> (raw)
In-Reply-To: <e13597370702131746q6a5d8e79i2341f5eb9c59bf6e@mail.gmail.com>
Eugene Ilkov wrote:
> I have I/O errors with Transcend SD highspeed card 2GB/150x when it's
> mounted in r/w mode (cardreader on sharp sl-c1000)
> It works well if I reverse mmcv4 patch commited to 2.6.19-git2
> (http://lkml.org/lkml/2006/10/4/27)
That patch is not the same as you are referencing in the rest of your mail.
> I'm not experienced in mmc, but I figured out that problem is
> somewhere in mmc_read_switch_caps() and when i change cmd.arg value
> from 0x80FFFFF1 to 0x00FFFFF1 it works fine too
> What argument should have SD_SWITCH opcode?
>
The argument is correct, so I'm guessing that your controller might be a bit
flaky and not handle the new timing. Can you enable MMC_DEBUG and send over the
dmesg?
Rgds
--
-- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org
PulseAudio, core developer http://pulseaudio.org
rdesktop, core developer http://www.rdesktop.org
next prev parent reply other threads:[~2007-02-15 5:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-14 1:46 2.6.20 mmc: problem with highspeed SD card Eugene Ilkov
2007-02-15 5:48 ` Pierre Ossman [this message]
2007-02-15 12:17 ` Eugene Ilkov
2007-02-15 16:39 ` Pierre Ossman
2007-02-15 16:52 ` Pierre Ossman
2007-02-15 17:08 ` Pierre Ossman
2007-02-15 22:44 ` Eugene Ilkov
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