Messages in this thread | | | Date | Thu, 17 Apr 2008 15:38:17 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: Smartmedia/xd card support - request for comments |
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On Thu, 17 Apr 2008, Alex Dubov wrote: > --- Ben Dooks <ben@fluff.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.
MTD is independent of JFFS2 and UBI. It's the hardware abtraction layer on which you build an FTL.
> On the other hand, "SmartMedia reader" > is a rather definite kind of animal that exists on its own.
No it is not. SmardMedia is a bare NAND chip, which is already covered by MTD. There are already other FTLs on top of MTD and the SmartMedia format just can be added to those.
Thanks, tglx
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