FAT for NAND Flash
dwmw2 at infradead.org
Thu May 16 11:08:17 EDT 2002
studying_mtd at yahoo.com said:
> To use JFFS2 with NAND, currently we use four layers
> of software :-
> A. JFFS2: filesystem driver
> B. MTD: Memory Technology Devices driver
> C. NAND: generic NAND driver
> D. Hardware specific driver
> If i want to use FAT with NAND then i have to use :-
> A. FAT: filesystem driver
> B. Translation: Translation layer
> C. MTD: Memory Technology Devices driver
> D. NAND: generic NAND driver
> E. Hardware specific driver
> So i have to add only Translation layer, rest layers
> will remain same.
> Am i right ? If not, please correct me.
Basically, yes. Some of those layers are so small they probably shouldn't
be included -- the 'MTD' layer only really allows MTD 'users' such as JFFS2
and the translation layers to find MTD 'device' such as the flash chip
drivers -- it doesn't get involved after passing a pointer to the access
> How can i write traslation layer , any reference.
Look at the FTL and NFTL code in drivers/mtd/ . Also look at the sddr09
driver for USB SmartMedia readers -- I think that has some of the actual
SmartMedia format implemented.
> Are you supporting SmartMedia DOS-FAT .
> From where i can get sources for SmartMedia DOS-FAT ,
> Linux tree , your CVS or some where else.
We don't support the SmartMedia translation layer yet. Many people have
talked about implementing it; nobody's yet shown me code. There is some
code which may be useful in the SDDR-09 driver for USB SmartMedia readers,
More information about the linux-mtd