[LinuxBIOS] Flashrom is not detecting 2MiB flash

[ollie]

On Tue, 2006-09-05 at 15:23 -0600, Alan Carvalho de Assis wrote:
> Hi LinuxBIOS' hackers,
> I am trying to get a SST49LF160C (ID1=0xbf and ID2=0x4c) working on my
> MB (chipset VIA8237), but I get a strange error.
> 
> If the flash_probe (probe_jedec) attempt to detect flash more than
> 512KB it don't get the flash IDs. 
> 
> Some time ago I see a Ron mail about MB can detect until 2MiB flash
> with no problem, but I don't know why it is not working them.
> 
> I added these lines to flashchips.c:
> 
> {"SST49LF160C", SST_ID, SST_49LF160C,   NULL, 2048, 64 * 1024, 
> probe_jedec, erase_chip_jedec, write_jedec, NULL},
> 
> Someone know why my MB doesn't detect flash it this size is more than
> 512MB?
> 
There is some register in the chipset which control how large of the
flash rom address are writable. Your mainboard probably only enabled
256kB of rom address so flash rom have problem working on a 512kB
flash part.

Ollie