Re: [coreboot] Flashing problem on the SST49LF004B

[Corey Osgood]

Please try this:

flashrom -E
dd if=/dev/zero of=zero.bin bs=1024 count=512
flashrom -v zero.bin

This should tell if the erase or write is where the problem is. Probably the
write, but better to know for sure. Also, please do a "reply all" to your
mailing's last response on the list, it helps to keep threads organized.

-Corey

On Feb 6, 2008 2:52 AM, Lalitha V.N.  wrote:
> Hi......
>
> Thanks for your reply........
>
> We have tried like this,we have copied original BIOS(PM49FL004) content in
> the filename feb6 and tried to flash on
>
> SST49LF004B flashrom chip  and then we followed this steps .....
>
> root@turtle10 ~]# /usr/sbin/flashrom -E
>
> Calibrating delay loop... OK.
>
> No LinuxBIOS table found.
>
> Found chipset "VT8237", enabling flash write... OK.
>
> SST49LF004A/B found at physical address 0xfff80000.
>
> Flash part is SST49LF004A/B (512 KB).
>
> Erasing flash chip
>
> [root@turtle10 ~]# /usr/sbin/flashrom -w feb6
>
> Calibrating delay loop... OK.
>
> No LinuxBIOS table found.
>
> Found chipset "VT8237", enabling flash write... OK.
>
> SST49LF004A/B found at physical address 0xfff80000.
>
> Flash part is SST49LF004A/B (512 KB).
>
> Flash image seems to be a legacy BIOS. Disabling checks.
>
> Programming page: 0007 at address: 0x00070000
>
> [root@turtle10 ~]# /usr/sbin/flashrom -v feb6
>
> Calibrating delay loop... OK.
>
> No LinuxBIOS table found.
>
> Found chipset "VT8237", enabling flash write... OK.
>
> SST49LF004A/B found at physical address 0xfff80000.
>
> Flash part is SST49LF004A/B (512 KB).
>
> Flash image seems to be a legacy BIOS. Disabling checks.
>
> Verifying flash... FAILED!
>
> Still  we are unable to flash , please guide us  which procedure should
> follow and is it necessary
>
> for us to change the flashrom chip? otherwise is it required to change the
> code in flashrom utility....?
>
> if it is require please guide where we need to change.. such that flash
> can happen..
>
> with regards,
> Lalitha.