Re: [coreboot] [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?
>
> I can try, yes, but which timing to modify ?
> What variable to update ?

I don't know.  I'm assuming that all 4 boards that you're talking about are
the same, or at least have the same chipsets.

Given that I would look at the actual flash routines that get used and see
if there are timing parameters that you can play with.

I'm just not that knowledgeable about flashrom.  I was hoping I could point
you in the right direction since you weren't getting other responses.

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, but which timing to modify ?
> > What variable to update ?
>
> I don't know.  I'm assuming that all 4 boards that you're talking about are
> the same, or at least have the same chipsets.

Exactly the same boards.
> Given that I would look at the actual flash routines that get used and see
> if there are timing parameters that you can play with.

I checked the code, there is no timing...
> From what I saw, flashrom just waits for the status returned by the flash

itself.
> I'm just not that knowledgeable about flashrom.  I was hoping I could point
> you in the right direction since you weren't getting other responses.
>
> Thanks,
> Myles

Thx for the idea, anyway.

Stephan.
>

[flashrom] pb flashing St M25P16

[Myles Watson]

> > Given that I would look at the actual flash routines that get used and
>
> see
> > if there are timing parameters that you can play with.
>
> I checked the code, there is no timing...
> From what I saw, flashrom just waits for the status returned by the flash
> itself.

OK.  Then it's possible that there's an SPI setting that says how fast the
bus goes.  I grepped the source for MHz and found references in it87spi.c
and ichspi.c.  It looks like they let you choose 20 or 33 MHz for ich and 33
or 16 MHz for it87.

It would probably help/interest more people if you said which board you are
using.

Thanks,
Myles

[flashrom] pb flashing St M25P16

Selon Myles Watson :
> > > Given that I would look at the actual flash routines that get used and
> >
> > see
> > > if there are timing parameters that you can play with.
> >
> > I checked the code, there is no timing...
> > From what I saw, flashrom just waits for the status returned by the flash
> > itself.
>
> OK.  Then it's possible that there's an SPI setting that says how fast the
> bus goes.  I grepped the source for MHz and found references in it87spi.c
> and ichspi.c.  It looks like they let you choose 20 or 33 MHz for ich and 33
> or 16 MHz for it87.

ok. found it.
These are not applied in my case.
We play with normal SPI and ICH cases.
> It would probably help/interest more people if you said which board you are
> using.

Ok.
My board is based on a EP80579.
Then, the chipset is seen as an ICH7.
> Thanks,
> Myles