[LinuxBIOS] [PATCH] ST M29F040B flash_and_burn driver

[Fredrik Tolf]

I bought a M29F040B 4 Mib flash chip for my EPIA-V motherboard today in
order to get LinuxBIOS on it, and found that flash_and_burn didn't
support it. So, I got the datasheet and modified a copy of the M29F400BT
driver to work with it.

I make no guarantees, of course, but it seems to Work For Me (TM), so I
thought you might want to include it. I haven't managed to get LinuxBIOS
working yet, though, but burning the original BIOS to it works and
boots.

I'm attaching the patch as MIME.

Fredrik Tolf

[Richard Smith]

On 8/23/06, Fredrik Tolf  wrote:
> I bought a M29F040B 4 Mib flash chip for my EPIA-V motherboard today in
> order to get LinuxBIOS on it, and found that flash_and_burn didn't
> support it. So, I got the datasheet and modified a copy of the M29F400BT
> driver to work with it.

How is this part different from the am29f040b?  The programming
sequences look mostly the same.

[Fredrik Tolf]

On Wed, 2006-08-23 at 18:52 -0500, Richard Smith wrote:
> On 8/23/06, Fredrik Tolf  wrote:
> > I bought a M29F040B 4 Mib flash chip for my EPIA-V motherboard today in
> > order to get LinuxBIOS on it, and found that flash_and_burn didn't
> > support it. So, I got the datasheet and modified a copy of the M29F400BT
> > driver to work with it.
>
> How is this part different from the am29f040b?  The programming
> sequences look mostly the same.

Mostly, indeed. There are a couple of differences, though, the most
important being that the address sequence as 555, 2AA, 555 instead of
AAA, 555, AAA. Then there are a couple of other differences as well,
such as when reading the product code, and the fact that the block
layout is uniform. There may have been some other things as well, but I
don't quite remember.

Fredrik Tolf

[Richard Smith]

> Mostly, indeed. There are a couple of differences, though, the most
> important being that the address sequence as 555, 2AA, 555 instead of
> AAA, 555, AAA. Then there are a couple of other differences as well,
> such as when reading the product code, and the fact that the block
> layout is uniform. There may have been some other things as well, but I
> don't quite remember.

Ok.. Just checking.  Great. Thanks for the patch.

[Fredrik Tolf]

On Wed, 2006-08-23 at 19:16 -0500, Richard Smith wrote:
> > [Snipped my senseless rambling]
>
> Ok.. Just checking.  Great. Thanks for the patch.

Sorry, I misread you as asking how it was different from the M29F400BT.
Actually, I hadn't checked the flashrom utility in the trunk, and it
appears someone got there before me. The existing driver worked
perfectly for my chip.

Fredrik Tolf

[Stefan Reinauer]

* Fredrik Tolf  [060824 01:35]:
> I bought a M29F040B 4 Mib flash chip for my EPIA-V motherboard today in
> order to get LinuxBIOS on it, and found that flash_and_burn didn't
> support it. So, I got the datasheet and modified a copy of the M29F400BT
> driver to work with it.
>
> I make no guarantees, of course, but it seems to Work For Me (TM), so I
> thought you might want to include it. I haven't managed to get LinuxBIOS
> working yet, though, but burning the original BIOS to it works and
> boots.
>
> I'm attaching the patch as MIME.

Can you remake the patch for the flashrom utility from LinuxBIOSv2
please?