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Re: au1100 MMC support

To: linux-mips@linux-mips.org
Subject: Re: au1100 MMC support
From: Rodolfo Giometti <giometti@linux.it>
Date: Wed, 9 Aug 2006 17:44:42 +0200
In-reply-to: <20060809133240.GA9690@enneenne.com>
Organization: GNU/Linux Device Drivers, Embedded Systems and Courses
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20060809102950.GA2531@enneenne.com> <20060809133240.GA9690@enneenne.com>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.12-2006-07-14
On Wed, Aug 09, 2006 at 03:32:40PM +0200, Rodolfo Giometti wrote:
> 
> >    mmc0: host does not support reading read-only switch. assuming 
> > write-enable.
> >    mmc0: starting CMD2 arg 00000000 flags 00000067
> >    mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: clock 450000Hz busmode 2 powermode 2 cs 0 Vdd 15 width 0
> >    mmc0: starting CMD9 arg 019a0000 flags 00000007
> >    mmc0: req done (CMD9): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: req done (CMD9): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: req done (CMD9): 1/0/0: 00000000 00000000 00000000 00000000
> >    mmc0: req done (CMD9): 1/0/0: 00000000 00000000 00000000 00000000
> 
> Here is the problem! I get no answer to CMD9 (CSD request) due a
> timeout (sd0_status=0x3028080).

Fixed. Here the patch in file drivers/mmc/au1xmmc.c:

           case MMC_RSP_R3:
                   mmccmd |= SD_CMD_RT_3;
                   break;
   +       case MMC_RSP_R6:
   +               mmccmd |= SD_CMD_RT_6;
   +               break;
           }
    
           switch(cmd->opcode) {

However the driver is still not functional since read/write operations
on the MMC are broken. :'(

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti@enneenne.com
Linux Device Driver                             giometti@gnudd.com
Embedded Systems                                giometti@linux.it
UNIX programming                     phone:     +39 349 2432127

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