Date: Fri, 16 Jan 2004 12:30:32 +0100
From: Florian Hinzmann <f.hinzmann@hamburg.de>
To: linux-kernel@vger.kernel.org
Cc: Gerard Roudier <groudier@free.fr>
Subject: linux2.6.1 - sym53c8xx: wide:0 documented, but not supported?
Message-Id: <20040116123032.32b03e30.f.hinzmann@hamburg.de>
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Hello!


I do own an SCSI host controller from Dawicontrol 
( http://www.dawicontrol.com/ ). Model name is "DC-2975 U". 

This host controller has a problem wich is covered within
the documentation inside kernel 2.6.1 in the file
"Documentation/scsi/sym53c8xx_2.txt":

> 10.2.9 Max wide
>         wide:1      wide scsi enabled
>         wide:0      wide scsi disabled
>   Some scsi boards use a 875 (ultra wide) and only supply narrow connectors.
>   If you have connected a wide device with a 50 pins to 68 pins cable 
>   converter, any accepted wide negotiation will break further data transfers.
>   In such a case, using "wide:0" in the bootup command will be helpfull. 


The controller works fine with linux 2.4.x when "wide:0" is set. But
it looks like this option is not supported with linux 2.6.x. I do think so
because of two reasons:

1) Setting it seems to have no effect.
2) From looking at the source:
File drivers/scsi/sym53c8xx_2/sym_glue.c defines this:

>static char setup_token[] __initdata =
>         "tags:"         "burst:"
>         "led:"          "diff:"
>         "irqm:"         "buschk:"
>         "hostid:"       "revprob:"
>         "verb:"         "debug:"
>         "settle:"       "nvram:"
>         "excl:"         "safe:"
>         ;

"wide:0" is missing.  I am not good with C and I might be wrong here. 
But reason no. 1 remains true still.


Can anyone confirm if my controller is not supported by linux2.6.x?
If yes, does anyone know if there is a patch or some other help 
available? Is anyone working on this?


  Regards
     Florian


-- 
  Florian Hinzmann                         private: f.hinzmann@hamburg.de
                                            Debian: fh@debian.org
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