[flashrom] Intel H57 chipset (untested) and W25Q64 flash -V output

[David Hendricks]

On Fri, Nov 25, 2011 at 8:10 AM, Pontus Rodling <frigolit at frigolit.net>wrote:

> Hi!
> flashrom told me to send you guys this, so here it is.
>
> I'm getting a transaction error when trying to read the (fully supported
> according to the wiki) W25Q64 flash chip on a Intel H57 chipset which is
> marked as untested.
> I tried both using swseq and hwseq. Both results are attached.
>

Looks like the Management Engine region is totally locked (from both reads
and writes), so it will fail whenever flashrom tries to read/write in that
region;
0x5C: 0x05ff0001 (FREG2: Management Engine)
0x00001000-0x005fffff is locked

We need to do some rather ugly stuff to hack around that. I have a very
ugly hack that applies to the Chromium OS branch you can try:
# clone chromium os branch of flashrom
git clone http://git.chromium.org/chromiumos/third_party/flashrom.gitflashrom-cros
&& cd flashrom-cros

# apply patch from https://gerrit.chromium.org/gerrit/#change,12117
git pull
https://gerrit.chromium.org/gerrit/p/chromiumos/third_party/flashromrefs/changes/17/12117/1

With that patch, flashrom will fill in unreadable parts with 0xff bytes,
and will not attempt to erase/write those parts. Verbose output will show
"WD" (Write Denied) for regions that are unwriteable.
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