linux-kernel - Re: Smartmedia/xd card support

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Message-ID: <48074C35.2020707@myrealbox.com>
Date:	Thu, 17 Apr 2008 09:10:13 -0400
From:	Andy Lutomirski <luto@...ealbox.com>
To:	Alex Dubov <oakad@...oo.com>
CC:	Ben Dooks <ben@...ff.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: Smartmedia/xd card support - request for comments

Alex Dubov wrote:
> --- Ben Dooks <ben@...ff.org> wrote:
> 
>> On Thu, Apr 17, 2008 at 01:50:33AM -0700, Alex Dubov wrote:
>>> I've implemented, with generous help from JMicron, a native support for Smartmedia/xD picture
>> card
>>> media. Currently, only JMicron backend is available, but TI expressed some interest in this
>> too,
>>> so TI Flashmedia backend may soon follow.
>>>
>>> Smartmedia cards are quite akin to the dumb flash chips, but they have their quirks that put
>> them
>>> aside as a separate media type.
>> They're NAND chips, just with a standard ECC/block replacement
>> stratergy... why isn't this under drivers/mtd ?
>>
> 
> They have nothing to do with JFFS or UBI (it's an interchange format).
> They require FTL.

Or does using them according to the interchange spec require FTL?

(That is, it would be really cool to finally have a supported MTD device 
that doesn't need to be soldered on to the motherboard, so I could plug 
the thing in and run UBIFS / JFFS2 / whatever.  I wouldn't be able to 
use it for a camera, then, but it would be great for little machines 
that don't need full hard drives, or for developing MTD filesystems on 
readily-available hardware.)

--Andy
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