[LinuxBIOS] Adding STMicroelectronics and Atmel 256k parts to FlashRom?

roger roger at eskimo.com
Fri Apr 20 23:24:15 CEST 2007

On Fri, 2007-04-20 at 11:11 +0200, Uwe Hermann wrote:
> On Thu, Apr 19, 2007 at 06:17:10PM -0700, roger wrote:
> > Is it possible to add these parts to FlashRom?
> > Atmel AT29C020 256k

Read & Write seems ok for this Atmel.  I've checked using a factory
bios.bin and also writing a linuxbios.rom file.  Boots with flashing
with a factory bios.bin.  So this chip is probably well tested here. :-)

> > STMicroelectronics M29F002 256k

Problematic.  I see the patch provides addresses for this chip instead
of using the jedec_probe for probe/read/write functions.

Altering the addresses for teh MDF002* chips to use the jedec_probe
functions seems to work.

I have test read the MDF002T chip here.  I don't want to write to it
because it's the chip that came with this board.

On a side note, both of these chips, I do 

# ./flashrom -r test.bin

# diff /dev/mtd0ro ./test.bin 
# cmp /dev/mtd0ro ./test.bin

Both tests state the files differ or EOF.

But if I do:
# dd if=/dev/mtd0ro of=./test.bin

#diff /dev/mtd0ro ./test.bin

diff states the files are the same.

<shrugs> I'm probably doing something wrong here. :-/

> Sure, please try attached patch and report whether it works (if so,
> please send an Acked-By).

Add my patch.

Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61

Fri Apr 20 14:23:49 PDT 2007
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