PIIX flashing woes with SST29EE010

PIIX flashing woes with SST29EE010

[Jeremy Jackson]

(crossposted)
FYI,

A problem I was having that *appeared* to be a problem with
getting writes to the flash chip, wasn't

It turns out that SST's datasheet for SST29EE010 is incorrect.
It turns out that the part I have *doesn't* respond to "new" style
ID mode entry sequence, as indicated in the manual.
It only responds to the "old" AA 55 80 AA 55 60 sequence.

I should have a generic PIIX map driver for MTD soon now.

Jeremy

Re: PIIX flashing woes with SST29EE010

[Eric W. Biederman]

"Jeremy Jackson" <jerj@coplanar.net> writes:

> (crossposted)
> FYI,
> 
> A problem I was having that *appeared* to be a problem with
> getting writes to the flash chip, wasn't
> 
> It turns out that SST's datasheet for SST29EE010 is incorrect.
> It turns out that the part I have *doesn't* respond to "new" style
> ID mode entry sequence, as indicated in the manual.
> It only responds to the "old" AA 55 80 AA 55 60 sequence.
> 
> I should have a generic PIIX map driver for MTD soon now.


So does jedec_probe work for you or do you need to patch it?

Eric

Re: PIIX flashing woes with SST29EE010

[Jeremy Jackson]

No I will need to patch it.  

I have been reading through
the source code of a DOS based flash utility, Uniflash (Pascal)
and it's probe routine appears to use both methods.
(it tries old method first BTW)
It works well (under DOS/FreeDOS) and supports a
surprising variety of chips and southbridges.

That's where I got the idea to try the old method.

I was just using an homemade one to try and figure out
what the problem was.  I'm looking at integrating it right
now.

Jeremy

----- Original Message ----- 
From: "Eric W. Biederman" <ebiederman@lnxi.com>
To: "Jeremy Jackson" <jerj@coplanar.net>
Cc: <linuxbios@lanl.gov>; <linux-mtd@lists.infradead.org>
Sent: Wednesday, April 03, 2002 5:11 PM
Subject: Re: PIIX flashing woes with SST29EE010


> "Jeremy Jackson" <jerj@coplanar.net> writes:
> 
> > (crossposted)
> > FYI,
> > 
> > A problem I was having that *appeared* to be a problem with
> > getting writes to the flash chip, wasn't
> > 
> > It turns out that SST's datasheet for SST29EE010 is incorrect.
> > It turns out that the part I have *doesn't* respond to "new" style
> > ID mode entry sequence, as indicated in the manual.
> > It only responds to the "old" AA 55 80 AA 55 60 sequence.
> > 
> > I should have a generic PIIX map driver for MTD soon now.
> 
> 
> So does jedec_probe work for you or do you need to patch it?
> 
> Eric
>