From: Philippe De Muyter <phdm@macqel.be>
To: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Nicolas Pitre <nico@cam.org>, linux-mtd@lists.infradead.org
Subject: Re: [PATCH] mtd: Apply Numonyx Axcell P33/P30 workaround for Lock/Unlock bug.
Date: Thu, 21 Oct 2010 11:33:43 +0200 [thread overview]
Message-ID: <20101021093343.GA17631@frolo.macqel> (raw)
In-Reply-To: <1287650398.2932.5.camel@localhost>
On Thu, Oct 21, 2010 at 11:39:58AM +0300, Artem Bityutskiy wrote:
> On Tue, 2010-10-19 at 16:24 +0200, Philippe De Muyter wrote:
> > Some flash chips have a small but annoying bug, documented in
> > "Numonyx Axcell P33/P30 256-Mbit Specification Update"
> >
> > It states :
> > When customer uses [...] block unlock, the block lock status might
> > be altered inadvertently. Lock status might be set to either 01h
> > or 03h unexpectedly (00h as expected data), which leads to
> > program/erase failure on certain blocks.
> >
> > A workaround is given, (summary : issue a "Read Lock Status" before
> > the "Lock" or "Unlock" command) which I have applied and tested
> > with success.
> >
> > Signed-off-by: Philippe De Muyter <phdm@macqel.be>
>
> Is this Numonyx-specific issue? Should there be some kind of "if
> (numonyx)" statement?
This is clearly a bug specific to some Numonyx flashes.
My chips have Manufacturer ID: 0x89, Device ID: 0x881B, but there are
other chips in the same family. The errata
http://www.numonyx.com/Documents/Specification%20Updates/509003_P3X_65nm_3V_256Mbit_Discrete.pdf does not list the ManufacturerIDs/DeviceIDs of the affected
chips.
Philippe
--
Philippe De Muyter phdm at macqel dot be Tel +32 27029044
Macq Electronique SA rue de l'Aeronef 2 B-1140 Bruxelles Fax +32 27029077
next prev parent reply other threads:[~2010-10-21 9:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-19 14:24 [PATCH] mtd: Apply Numonyx Axcell P33/P30 workaround for Lock/Unlock bug Philippe De Muyter
2010-10-21 8:39 ` Artem Bityutskiy
2010-10-21 9:33 ` Philippe De Muyter [this message]
2010-10-21 10:29 ` Artem Bityutskiy
2010-10-21 16:32 ` Nicolas Pitre
2010-10-21 19:34 ` Philippe De Muyter
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=20101021093343.GA17631@frolo.macqel \
--to=phdm@macqel.be \
--cc=dedekind1@gmail.com \
--cc=linux-mtd@lists.infradead.org \
--cc=nico@cam.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.