linux-kernel - Re: [PATCH 3/3] mtd/nand : workaround for Freescale FCM to support large-page Nand chip

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Date:	Mon, 12 Dec 2011 23:09:51 +0200
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Scott Wood <scottwood@...escale.com>
Cc:	shuo.liu@...escale.com, dwmw2@...radead.org,
	Artem.Bityutskiy@...ia.com, linux-mtd@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, leoli@...escale.com
Subject: Re: [PATCH 3/3] mtd/nand : workaround for Freescale FCM to support
 large-page Nand chip

On Tue, 2011-12-06 at 18:09 -0600, Scott Wood wrote:
> On 12/03/2011 10:31 PM, shuo.liu@...escale.com wrote:
> > From: Liu Shuo <shuo.liu@...escale.com>
> > 
> > Freescale FCM controller has a 2K size limitation of buffer RAM. In order
> > to support the Nand flash chip whose page size is larger than 2K bytes,
> > we read/write 2k data repeatedly by issuing FIR_OP_RB/FIR_OP_WB and save
> > them to a large buffer.
> > 
> > Signed-off-by: Liu Shuo <shuo.liu@...escale.com>
> > ---
> > v3:
> >     -remove page_size of struct fsl_elbc_mtd.
> >     -do a oob write by NAND_CMD_RNDIN. 
> > 
> >  drivers/mtd/nand/fsl_elbc_nand.c |  243 ++++++++++++++++++++++++++++++++++----
> >  1 files changed, 218 insertions(+), 25 deletions(-)
> 
> What is the plan for bad block marker migration?

Why it should be migrated? I thought that you support 2KiB pages, and
this adds 4 and 8 KiB pages support, which you never supported before.
What is the migration you guys are talking about?

Artem.

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