From: jonas.holmberg@axis.com
To: John Burch <jburch@vincisystems.com>
Cc: "'Jörn Engel'" <joern@wohnheim.fh-wedel.de>
Cc: 'David Woodhouse' <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Subject: Re: Mtd block access (jffs2 formatted) and mtd char access(unformatted) on different partitions of a single flashdevice
Date: Thu, 22 May 2003 22:31:38 +0200 [thread overview]
Message-ID: <20030522203138.GA6695@vin.axis.se> (raw)
In-Reply-To: <000a01c31f9f$ceb90940$1200a8c0@JOHNB>
> > Is this chip-feature "probable"? We used to do simutaneous
> > erases in a bootloader, but after a while we started using
> > chips that couldn't do that so we had to change the behaviour
> > to be able to handle all sorts of chips. I'm not sure if CFI
> > covers that particular feature, but it would be great if it
> > did. It wouldn't be so great to have to check JEDEC IDs...
> >
>
> As far as I know, the feature is unique to AMD though I don't know if it
> is supported across their entire product line. Also, it is not a CFI
> specific feature. For example, it's discussed in the 29LV008B (not a
> CFI compliant device) data sheet under the "Sector Erase Command
> Sequence" section.
If it is AMD specific someone ought to do some performance tests
before working on a patch, because when we changed method
from simultaneous erase to erasing one block at a time it wasn't
slower (or at least not much slower iirc) erasing an entire 16Mbit
AMD device.
/Jonas (hoping that changing email-client will allow me to sneak
past Davids naughty header-checking filters).
next prev parent reply other threads:[~2003-05-22 20:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3C6BEE8B5E1BAC42905A93F13004E8AB01CAF732@mailse01.axis.se>
2003-05-21 13:49 ` Mtd block access (jffs2 formatted) and mtd char access(unformatted) on different partitions of a single flashdevice John Burch
2003-05-21 13:52 ` Jörn Engel
2003-05-21 14:36 ` John Burch
2003-05-21 15:57 ` Jörn Engel
2003-05-22 12:40 ` John Burch
2003-05-22 20:31 ` jonas.holmberg [this message]
2003-05-21 9:25 Mtd block access (jffs2 formatted) and mtd char access (unformatted) on different partitions of a single flash device David Woodhouse
2003-05-21 12:33 ` Mtd block access (jffs2 formatted) and mtd char access(unformatted) on different partitions of a single flashdevice John Burch
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