[flashrom] SST25VF016B verbose output

[Wagner, Helge (GE Intelligent Platforms)]

Ups, the flash devices i have set a different write algorithm was the
SST 25VF032B and 25VF064C, and not the 25VF016B, and i have NOT tested
the 25VF016B before.
Sorry for that wrong message!
So you will not see any speed-up for the 25VF016B, but the error
messages will be gone after applying my patch.
What you could do to speed-up this chip is to change the write algorithm
from "spi_chip_write_1" to "spi_aai_write" after applying my SST
25VF032B and 25VF064C patch.

Regards,
Helge

-----Original Message-----
From: flashrom-bounces at flashrom.org
[mailto:flashrom-bounces at flashrom.org] On Behalf Of Wagner, Helge (GE
Intelligent Platforms)
Sent: Dienstag, 17. August 2010 09:29
To: Veres, Greg; Michael Karcher
Cc: flashrom at flashrom.org
Subject: Re: [flashrom] SST25VF016B verbose output

Hi,

i have marked the erase of that chip already as working, and i have also
supplied a patch which will prevent the error messages (i have added
on-the-fly reprogramming of the list of predefine commands).
Please see
http://www.flashrom.org/pipermail/flashrom/2010-August/004331.html
And with my patch you will see a significant programming speed-up (from
228 to 113 seconds in my case) as it now uses a different programming
algorithm.
Unfortunally, my patch has not been acked yet. Hopefully it will happen
soon.

Regards,
Helge

-----Original Message-----
From: flashrom-bounces+helge.wagner=ge.com at flashrom.org
[mailto:flashrom-bounces+helge.wagner=ge.com at flashrom.org] On Behalf Of
Veres, Greg
Sent: Dienstag, 17. August 2010 00:50
To: Michael Karcher
Cc: flashrom at flashrom.org
Subject: Re: [flashrom] SST25VF016B verbose output

Great. It did seem to work. When I read the section of the memory that I
wrote, it contained what I wrote. So I was happy. :)

Does this allow you guys to mark erasing on that chip as a yes? It is
currently marked as '?'.

Greg

-----Original Message-----
From: Michael Karcher [mailto:flashrom at mkarcher.dialup.fu-berlin.de]
Sent: August-16-10 6:33 PM
To: Veres, Greg
Cc: flashrom at flashrom.org
Subject: Re: [flashrom] SST25VF016B verbose output

Am Montag, den 16.08.2010, 11:43 -0700 schrieb Veres, Greg:
> I noticed that the erase fails on the SST25VF016B. Attached is the log

> file for burning a portion of the bios file.
Thanks for your mail. While the output of flashrom is quite unclear,
what you are observing is not an erase failure, but normal operation on
Intel chipsets. Intel Chipsets allow only to send 8 predefined commands
to the flash chip and flashrom does not yet support changing the
predefinitions on the fly.

Your flash chip supports different erase commands (mostly eraseing
different block sizes), and both 0x20 and 0x52, the first two erase
commands listed for your chip, are not in the default list-of-eight that
is sent to the chipset, so these erase methods fail. The third one OTOH
worked flawlessly, allowing flashrom to continue.

Regards,
  Michael Karcher


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