From: "Stefan Roese" <stefan.roese@esd-electronics.com>
To: "David Woodhouse" <dwmw2@infradead.org>
Cc: <linux-mtd@lists.infradead.org>
Subject: Re: SST Flash Support (SST39VF160)
Date: Wed, 22 May 2002 10:49:18 +0200 [thread overview]
Message-ID: <EFEAIMDCOOOHIEPHDNFJOEMCDPAA.stefan.roese@esd-electronics.com> (raw)
In-Reply-To: <17271.1021997293@redhat.com>
> stefan.roese@esd-electronics.com said:
> > physmap flash device: 200000 at ffc00000 CFI: Found no Physically
> > mapped flash device at location zero
>
> Weird. That chip is definitely supposed to do CFI.
> http://www.ssti.com/products/pdf/399-39LF-VF160-02.000-DS.pdf
>
> Sure it's wired up the same and your configured buswidth is right?
Absolutely sure. It's the same board!
After digging a little deeper into the sst documentation, I found the
problem:
SST flash need a three byte write sequence (no one), to enter the cfi query
mode!
5555 <- aa
2aaa <- 55
5555 <- 98
This does not seem to be CFI compliant!!!
How can we support the sst chips? Extend the cfi code (special for sst), or
extend the amd code? In PPCBoot we use the amd mode and it works pretty
good.
Any ideas/comments?
Stefan.
next prev parent reply other threads:[~2002-05-22 8:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-21 14:08 SST Flash Support (SST39VF160) Stefan Roese
2002-05-21 15:00 ` David Woodhouse
2002-05-21 15:41 ` Stefan Roese
2002-05-21 16:08 ` David Woodhouse
2002-05-22 8:49 ` Stefan Roese [this message]
2002-05-22 8:52 ` David Woodhouse
2002-05-22 13:35 ` Stefan Roese
2002-05-22 13:41 ` David Woodhouse
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=EFEAIMDCOOOHIEPHDNFJOEMCDPAA.stefan.roese@esd-electronics.com \
--to=stefan.roese@esd-electronics.com \
--cc=dwmw2@infradead.org \
--cc=linux-mtd@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox