Commit 4f659923 authored by Matthieu CASTET's avatar Matthieu CASTET Committed by David Woodhouse
Browse files

[MTD] [NAND] S3C2412 fix hw ecc 



S3C2412 use differents registers than s3c2440 for hw ecc handling.

Signed-off-by: default avatarMatthieu CASTET <matthieu.castet@parrot.fr>
Acked-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent 2a7295b2

drivers/mtd/nand/s3c2410.c

+27 −0
Original line number Diff line number Diff line
@@ -418,6 +418,15 @@ static void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode) 
	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);
@@ -441,6 +450,20 @@ static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u 
	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);
@@ -618,6 +641,10 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info, 
			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;