tree 4b6fb8163f074056ff12d1f3d28cd911dad2aaa4
parent 1455b2baea9f4379086cabf1dcc1388c478c745c
author Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1242052831 +0000
committer Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1242052831 +0000

Check probing results for flash contents

When flashrom JEDEC code sends the ID command to the chip, it expects to
see IDs in the default flash location.

However, sometimes the chip does not react to the ID command, either
because it doesn't understand the command or because the command never
reached it. One way to detect this is to compare ID output with flash
chip contents for the same location. If they are identical, there is a
high chance you're not actually seeing ID output. Warn the user in that
case.

This patch helps a lot when a chip is not recognized and we want to
check if the probe responses are real IDs or just random flash chip
contents.

This should probably be added to all probe functions, but probe_jedec
is called for all sizes and thus flashrom will check this condition at
least once per size, making sure we can cross-match the warning.

Corresponding to flashrom svn r494.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: FENG Yu Ning <fengyuning1984@gmail.com>