[flashrom] pb flashing St M26P16

Hello all,

I'm facing some issues, with some flash ST M25P16.
When using flashrom (623), after programming, some bits are not programmed
correctly. Each time, the same bits are wrong, making the BIOS unusable.

In the file attached, the diff between what should be seen and and is really
programmed. I'm still checking, but it seems that the same diffs are seen
after each programmation of the flash.

Note that I'm facing this on 3 boards. The 4th one is working properly.
On each non working board, some bits are wrong, but they are not the same, on
each board.

Any hint ?
Any idea ?

Regards,

Stephan.

[flashrom] pb flashing St M25P16

Sorry, wrong part ID in the title.
The flash part is M25P16, not M26P16.

Selon [e-mail]:
> Hello all,
>
> I'm facing some issues, with some flash ST M25P16.
> When using flashrom (623), after programming, some bits are not programmed
> correctly. Each time, the same bits are wrong, making the BIOS unusable.
>
> In the file attached, the diff between what should be seen and and is really
> programmed. I'm still checking, but it seems that the same diffs are seen
> after each programmation of the flash.
>
> Note that I'm facing this on 3 boards. The 4th one is working properly.
> On each non working board, some bits are wrong, but they are not the same, on
> each board.
>
> Any hint ?
> Any idea ?
>
> Regards,
> Stephan.

[flashrom] pb flashing St M25P16

Really ?
No one can help ?

Selon [e-mail]:
> Hello all,
>
> I'm facing some issues, with some flash ST M25P16.
> When using flashrom (623), after programming, some bits are not programmed
> correctly. Each time, the same bits are wrong, making the BIOS unusable.
>
> In the file attached, the diff between what should be seen and and is really
> programmed. I'm still checking, but it seems that the same diffs are seen
> after each programmation of the flash.
>
> Note that I'm facing this on 3 boards. The 4th one is working properly.
> On each non working board, some bits are wrong, but they are not the same, on
> each board.
>
> Any hint ?
> Any idea ?
>
> Regards,
> Stephan.

[flashrom] pb flashing St M25P16

[Myles Watson]

> > Note that I'm facing this on 3 boards. The 4th one is working properly.
> > On each non working board, some bits are wrong, but they are not the
>
> same, on
> > each board.

My best guess would be a timing issue.  Is there a way that you can lengthen
the default delays to something safer but not too painful (2x or 3x) and try
again?

Thanks,
Myles

[flashrom] pb flashing St M25P16

Selon Myles Watson :
> > > Note that I'm facing this on 3 boards. The 4th one is working properly.
> > > On each non working board, some bits are wrong, but they are not the
> >
> > same, on
> > > each board.
>
> My best guess would be a timing issue.  Is there a way that you can lengthen
> the default delays to something safer but not too painful (2x or 3x) and try
> again?

I can try, yes.
which tempo to increment ?
which variable to update ?
> Thanks,
> Myles

[flashrom] pb flashing St M25P16

[Stephan GUILLOUX]

Some news for this issue.
It looks to be hardware, on some parts :
We tried to increase or decrease the board temperature, and then, some 
non working flash work with a lower temperature...
So, flashrom looks to be safe ;-)

[e-mail] a écrit :
> Really ?
> No one can help ?
>
> Selon [e-mail]:
> > Hello all,
> >
> > I'm facing some issues, with some flash ST M25P16.
> > When using flashrom (623), after programming, some bits are not programmed
> > correctly. Each time, the same bits are wrong, making the BIOS unusable.
> >
> > In the file attached, the diff between what should be seen and and is really
> > programmed. I'm still checking, but it seems that the same diffs are seen
> > after each programmation of the flash.
> >
> > Note that I'm facing this on 3 boards. The 4th one is working properly.
> > On each non working board, some bits are wrong, but they are not the same, on
> > each board.
> >
> > Any hint ?
> > Any idea ?
> >
> > Regards,
> > Stephan.