From: Sascha Hauer <s.hauer@pengutronix.de>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
Richard Weinberger <richard@nod.at>
Subject: Re: [PATCH] mtd: rawnand: onfi: read parameter pages in one go
Date: Thu, 16 May 2024 13:48:36 +0200 [thread overview]
Message-ID: <ZkXylC2xrlqGW_xV@pengutronix.de> (raw)
In-Reply-To: <20240516115812.02908822@xps-13>
On Thu, May 16, 2024 at 11:58:12AM +0200, Miquel Raynal wrote:
>
> miquel.raynal@bootlin.com wrote on Thu, 16 May 2024 10:13:50 +0200:
>
> > Hi Sascha,
> >
> > s.hauer@pengutronix.de wrote on Tue, 14 May 2024 15:41:40 +0200:
> >
> > > nand_read_data_op() is not supported by all NAND controllers.
> > > nand_change_read_column_op() is not supported or at least is hard to
> > > support by NAND controllers that use a different page layout than
> > > expected by the NAND core.
> >
> > I'm sorry but RNDOUT is not so hard to support, and I know no NAND
> > controller without this feature (I think even the first mxc controller
> > supports it?). However, the command does not exist on small page NANDs
> > (512 bytes).
>
> Nevermind, the ONFI spec (in all versions) states that RNDOUT are
> allowed during parameter page reads, regardless of the size of the chip
> (at least, that is not mentioned).
I could imagine that there are no ONFI compliant chips with small pages,
I don't know how to verify this though.
Anyway, this was a try to make reading the parameter pages a bit more
straight forward. It seems the MXC NAND controller can't support reading
three parameter pages in one go either. It works in software ECC mode
because I reverse the syndome type layout the controller introduces, but
it can't work with hardware ECC. So disregard this patch.
Sascha
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2024-05-16 11:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-14 13:41 [PATCH] mtd: rawnand: onfi: read parameter pages in one go Sascha Hauer
2024-05-16 8:13 ` Miquel Raynal
2024-05-16 9:58 ` Miquel Raynal
2024-05-16 11:48 ` Sascha Hauer [this message]
2024-05-16 13:09 ` Miquel Raynal
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=ZkXylC2xrlqGW_xV@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mtd@lists.infradead.org \
--cc=miquel.raynal@bootlin.com \
--cc=richard@nod.at \
/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