From: Ben Dooks <ben@fluff.org.uk>
To: Matthieu CASTET <matthieu.castet@parrot.fr>
Cc: linux-mtd@lists.infradead.org, Ben Dooks <ben-fbdev@fluff.org>
Subject: Re: [PATCH] S3C2412 fix hw ecc
Date: Tue, 13 Feb 2007 11:45:25 +0000 [thread overview]
Message-ID: <20070213114525.GD2211@fluff.org.uk> (raw)
In-Reply-To: <45D1A15E.5030109@parrot.fr>
On Tue, Feb 13, 2007 at 12:30:38PM +0100, Matthieu CASTET wrote:
> Hi,
>
> S3C2412 use differents registers than s3c2440 for hw ecc handling.
>
> Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.fr>
Acked-by: Ben Dooks <ben-linux@fluff.org>
> Index: linux-2.6.20/drivers/mtd/nand/s3c2410.c
> ===================================================================
> --- linux-2.6.20.orig/drivers/mtd/nand/s3c2410.c 2007-02-13 10:17:54.000000000 +0100
> +++ linux-2.6.20/drivers/mtd/nand/s3c2410.c 2007-02-13 12:07:10.000000000 +0100
> @@ -419,6 +419,15 @@
> writel(ctrl, info->regs + S3C2410_NFCONF);
> }
>
> +static void s3c2412_nand_enable_hwecc(struct mtd_info *mtd, int mode)
> +{
> + struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
> + unsigned long ctrl;
> +
> + ctrl = readl(info->regs + S3C2440_NFCONT);
> + writel(ctrl | S3C2412_NFCONT_INIT_MAIN_ECC, info->regs + S3C2440_NFCONT);
> +}
> +
> static void s3c2440_nand_enable_hwecc(struct mtd_info *mtd, int mode)
> {
> struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
> @@ -442,6 +451,20 @@
> return 0;
> }
>
> +static int s3c2412_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
> +{
> + struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
> + unsigned long ecc = readl(info->regs + S3C2412_NFMECC0);
> +
> + ecc_code[0] = ecc;
> + ecc_code[1] = ecc >> 8;
> + ecc_code[2] = ecc >> 16;
> +
> + pr_debug("calculate_ecc: returning ecc %02x,%02x,%02x\n", ecc_code[0], ecc_code[1], ecc_code[2]);
> +
> + return 0;
> +}
> +
> static int s3c2440_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
> {
> struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
> @@ -619,6 +642,10 @@
> break;
>
> case TYPE_S3C2412:
> + chip->ecc.hwctl = s3c2412_nand_enable_hwecc;
> + chip->ecc.calculate = s3c2412_nand_calculate_ecc;
> + break;
> +
> case TYPE_S3C2440:
> chip->ecc.hwctl = s3c2440_nand_enable_hwecc;
> chip->ecc.calculate = s3c2440_nand_calculate_ecc;
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
--
Ben (ben@fluff.org, http://www.fluff.org/)
'a smiley only costs 4 bytes'
prev parent reply other threads:[~2007-02-13 11:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-13 11:30 [PATCH] S3C2412 fix hw ecc Matthieu CASTET
2007-02-13 11:45 ` Ben Dooks [this message]
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