Flashing problem on the SST49LF004B

[Lalitha V.N.]

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.

[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.

[Lalitha V.N.]

Hi......

we have tried these steps but now we got the same result as  what we got in
the previous steps....

and these are the steps we followed ......

[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 ~]# dd if=/dev/zero of=zero.bin bs=1024 count=512
512+0 records in
512+0 records out
524288 bytes (524 kB) copied, 0.00345299 s, 152 MB/s

[root@turtle10 ~]# /usr/sbin/flashrom -v zero.bin
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!

with regards,
Lalitha.

On Feb 6, 2008 2:08 PM, Corey Osgood  wrote:
> 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.