linux-kernel - Re: Status of Ricoh Bay1Controller driver?

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Message-ID: <20080706012435.016358d6@mjolnir.drzeus.cx>
Date:	Sun, 6 Jul 2008 01:24:35 +0200
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	Sascha Sommer <saschasommer@...enet.de>
Cc:	sdricohcs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: Status of Ricoh Bay1Controller driver?

On Sat, 5 Jul 2008 21:11:49 +0200
Sascha Sommer <saschasommer@...enet.de> wrote:

> 
> There is still some hack for ACMDs. I know you won't like that but I did not  
> get the SD_APP_SEND_SCR command to work without it.
> 
> MMC_SEND_EXT_CSD does not work (also not with that ACMD hack) and prints out 
> something like:
> 

The SCR and EXT_CSD are both the only data transfers that are done in
1-bit mode in the respective init paths. Are you sure that hack you
have for ACMDs is really for ACMDs and not for 1-bit transfers?

(And you're right about me not liking that hack, but I can let that one
slide as long as you agree it is important to get rid off ;))

> mmc0: unable to read EXT_CSD, performance might suffer.
> 
> The card works without problems after this message.
> 

Yeah, it works for older MMC cards. The newer, larger ones will fail
when it can't read the EXT_CSD though.

Rgds
-- 
     -- Pierre Ossman

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

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