Re: Problem accessing Sandisk CompactFlash Cards (Connected to the IDE bus)

[Neil Horman <nhorman@redhat.com>]

Marc Strämke wrote:

> Neil Horman wrote:
>
>> Its been awhile, but the last time that I looked at the relevant 
>> code, there was a table of drive vendor/device strings that were used 
>> to identify CFA devices and differentiate them from regular ide 
>> devices.  If this particular device isn't a match in that table, it 
>> would be mis-identified, and that could be leading to your above 
>> problem.
>> Neil
>>
>
> Thx for the suggestion. The only table i could find is in 
> drive_is_flashcard, which is only checked if drive->removable is set, 
> which is not the case with the newer card (but is with the old one).
> Another thing which is weird is that the old card returns an 
> id->config value of 0x848a which according to manuals from SanDisk is 
> for a Compactflash card NOT running in True Ide mode, but instead in 
> memory mapped IO mode (iam no expert for Compactflash, so i dont even 
> know the exact difference), but as far as i can tell are both cards 
> wired by the IDE adapter so that they should run in True IDE mode, and 
> if i understand the Compactflash specification correctly, this is the 
> only mode of operation which is electrically compatible with the 
> IDE/ATA bus, isnt it?
> I tried forcing both the drive->removable and drive->is_flash flags to 
> the true, my dmesg output then shows me the card as a CFA DISK drive, 
> but i still get the same errors when reading or writing from/to the 
> device.
>
> TIA for any further hints,
> Marc
>
> -
> To unsubscribe from this list: send the line "unsubscribe 
> linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

What kernel are you looking at?  I'm looking at 2.4.21, and it seems to 
get checked more-or-less universally.  Also, I noticed this:
|| !strncmp(id->model, "SunDisk SDCFB", 13)    /* SunDisk */
I've not heard of SunDisk.  SunDisk->SanDisk == Typo?
Are you using a SanDisk CFA card?  Could this perhaps be part of your issue?
Neil

-- 
/***************************************************
 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman@redhat.com
 *gpg keyid: 1024D / 0x92A74FA1
 *http://pgp.mit.edu
 ***************************************************/