linux-kernel - Re: [PATCH 2/2 v4] mtd/nand : workaround for Freescale FCM to support large-page Nand chip

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Message-ID: <4EE2608B.4000103@freescale.com>
Date:	Fri, 9 Dec 2011 13:24:59 -0600
From:	Scott Wood <scottwood@...escale.com>
To:	<shuo.liu@...escale.com>
CC:	<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 2/2 v4] mtd/nand : workaround for Freescale FCM to support
 large-page Nand chip

On 12/09/2011 03:42 AM, 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>
> Signed-off-by: Shengzhou Liu <Shengzhou.Liu@...escale.com>
> Signed-off-by: Li Yang <leoli@...escale.com>
> ---
> v4 : allocate (8+1)k buffer for large page chip.
> 
>  drivers/mtd/nand/fsl_elbc_nand.c |  246 ++++++++++++++++++++++++++++++++++----
>  1 files changed, 221 insertions(+), 25 deletions(-)

Again, I think we need to sort out the bad block migration first -- at
least how we're going to mark the chip as having been migrated, so the
driver can check for it.

-Scott

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