[coreboot] Newbee patch for A49LF040A (Alix2c2) please have a look.
ward at gnu.org
Wed Jun 18 04:08:58 CEST 2008
On Sat, Jun 07, 2008 at 04:29:13PM +0200, Peter Stuge wrote:
> On Sat, Jun 07, 2008 at 04:07:29PM +0200, Stefan Reinauer wrote:
> > Ah, this is broken... flashrom should not continue when it found a
> > chip in a given memory area already.
> flashrom supports boards with more than one flash chip.
> But perhaps we need to teach flashrom more about how chips can be
> connected. On boards with two chips, they can obviously not be on
> the same LPC bus for example. There would be a collision on the bus.
> Ward and me investigated. The W29EE011 probe command is quite similar
> to the A49LF040A block erase command, but the last byte differs.
> A49LF040A seems to enter an undefined state when it receives such an
> unknown command. Sleeping the maximum A49LF040A timeout before
> sending the jedec ID exit command did not help.
> It seems to me that the Amic chip is behaving badly.
> Action plan?
> 1. Penalize W29EE011 by never probing it without -c W29EE011
> This sucks because the W29EE011 chip isn't the one misbehaving here.
> On the other hand, it does have a nasty product ID sequence.
Please find a patch attached that does just that.
Ward Vandewege <ward at fsf.org>
Free Software Foundation - Senior System Administrator
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