linux-kernel - Re: PROBLEM : On a laptop Aopen 1556 or 1557 my integrated card-reader doesn't work.

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Message-ID: <20070827105224.172fc5b0@poseidon.drzeus.cx>
Date:	Mon, 27 Aug 2007 10:52:24 +0200
From:	Pierre Ossman <drzeus@...eus.cx>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	giggz <giggzounet@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: PROBLEM : On a laptop Aopen 1556 or 1557 my integrated
 card-reader doesn't work.

On Mon, 27 Aug 2007 00:57:10 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> 
> I don't even know which subsystem is supposed to handle that device. 
> Perhaps someone can tell us.  It's a Secure Digital card slot?  I
> think the MMC subsystem can handle some types SD cards, but not all?
> 
> Perhaps Pierre can clue us in?
> 

The MMC layer can handle all MMC and SD cards, but it does not support
all known controllers as most vendors refuse to release any specs.

Unfortunately, that is the case here. Ricoh has several controller
interfaces, and currently we only support one of them (the public
standard sdhci interface).

So until Ricoh changes their policy or someone reverse engineers their
interface, then I'm afraid you're out of luck.

Rgds
Pierre

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