From: Pierre Ossman <drzeus-list@drzeus.cx>
To: David Brownell <david-b@pacbell.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: mmc_spi stopped working
Date: Mon, 22 Oct 2007 20:03:35 +0200 [thread overview]
Message-ID: <20071022200335.7c1eca12@poseidon.drzeus.cx> (raw)
In-Reply-To: <20071017193713.38D3923A5D5@adsl-69-226-248-13.dsl.pltn13.pacbell.net>
On Wed, 17 Oct 2007 12:37:13 -0700
David Brownell <david-b@pacbell.net> wrote:
> When enumerating MMC cards using SPI, don't support the "just probe"
> mechanism since it doesn't always work. Instead, always wait for the
> reset to complete before issuing the next request.
>
> This is a regression ... this SanDisk MMC card used to enumerate with
> no trouble, despite this particular spec violation.
>
I've been testing a bit more here, and I can't get this particular bug. I have others though:
Out of my five MMC cards, only two work properly. One doesn't respond to SPI commands at all, and two hang on a second CMD0 and return ILLEGAL_COMMAND on a second run of CMD1. All of this is of course wildly out of spec. SPI seems to be a bonus, not a given. :/
As for your card, could you send me a dump as I'm unable to produce the issue here?
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:[~2007-10-22 18:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-17 19:19 Pierre Ossman
2007-10-17 19:37 ` David Brownell
2007-10-17 19:52 ` Pierre Ossman
2007-10-24 22:27 ` David Brownell
2007-10-27 13:00 ` Pierre Ossman
2007-10-22 18:03 ` Pierre Ossman [this message]
2007-10-24 22:37 ` David Brownell
2007-10-27 12:52 ` Pierre Ossman
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