Re: NAND flash support

["Maen Suleiman" <maen.suleiman%gmail.com@localhost>]

Thanks all for the answers,  some questions:

- Where can I get the MI Flash layer ? Is it in the NetBSD current ?

- Using this Layer, is it possible to mount any File system, or some
specific File systems?

-  Is there any performance tests have been done?

- What is the latest status of this port? and how is the way to
contribute to it, if is it possible?

Thanks in advance

On 3/9/07, Matt Thomas <matt%3am-software.com@localhost> wrote:
> On Mar 9, 2007, at 12:45 AM, Toru Nishimura wrote:
>
> > David Young dyoung%pobox.com@localhost wrote;
> >
> >> Once there are drivers for two or more NAND chips in NetBSD, we can
> >> extract the functions that the drivers have in common and produce a
> >> NAND framework.
> >
> > Let's go in a smart way.  I realized L* MTD is not a good example
> > after all
> > when I started NAND block device code.
> >
> > There are number of ways to control NAND chip;
> > 1. bare GPIO fiddling,
> > 2. ALE / CLE by address control signal,
> > 3. dedicated HW supports by SoC.  The simplest is to have extra wires
> > to replace GPIOs.  The most sophisticated one can perform DMA xfer
> > with automatic ECC generation and verification.  We can see the wide
> > variety of NAND circuit support in modern SoC; Toshiba TX49, AMCC
> > PPC440, MesDigital MMSP2, Sharp LH and a flock of other ARM7/9 SoC.
>
> And you have NAND via MMC which uses a protocol to read/write/erase
> blocks on the NAND.  One could use this protocol as a basis for a new
> API.