tree 67fc8f460e38a920281717647949a69fdd9956c2
parent 928d1d77f8623c120d8763e20e1ca58df9c5c4c6
author Michael Schwingen <michael@schwingen.org> 1203372995 +0100
committer Stefan Roese <sr@denx.de> 1203610339 +0100

CFI: Do not use uninitialized cmd_reset

Do not use uninitialized cmd_reset; issue both AMD and Intel reset
commands instead

From a short test, it looks like AMD-style flash roms treat *any* unknown
command write as a reset, at least when in CFI Query mode, so issuing the
Intel reset command to AMD-style flashs seems safe (from the small sample I
have), plus the 3-cycle magic sequence should kick the state machine into
the right state even without a reset command. Since the AMD-style flashs
require the unlock sequence for real operation, I chose to try the AMD reset
command first, so that Intel flashs do no see an invalid command prior to
the CFI query.

I have tested the patch on AM29LV320-style flashs from Fujitsu and Macronix,
plus Intel StrataFlash.

Signed-off-by: Michael Schwingen <michael@schwingen.org>
Signed-off-by: Stefan Roese <sr@denx.de>