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path: root/target/linux/s3c24xx/patches-2.6.31/300-s3c-nand.patch
blob: b8508f28e95d6f05df3d73f332fbc7b80afdc5bc (plain)
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diff --git a/arch/arm/plat-s3c/include/plat/nand.h b/arch/arm/plat-s3c/include/plat/nand.h
index 18f9588..fff94e6 100644
--- a/arch/arm/plat-s3c/include/plat/nand.h
+++ b/arch/arm/plat-s3c/include/plat/nand.h
@@ -33,6 +33,8 @@ struct s3c2410_nand_set {
 
 	int			nr_chips;
 	int			nr_partitions;
+	unsigned int		flags;
+#define S3C2410_NAND_BBT	0x0001
 	char			*name;
 	int			*nr_map;
 	struct mtd_partition	*partitions;
@@ -51,6 +53,9 @@ struct s3c2410_platform_nand {
 	int			nr_sets;
 	struct s3c2410_nand_set *sets;
 
+	/* force software_ecc at runtime */
+	int	software_ecc;
+
 	void			(*select_chip)(struct s3c2410_nand_set *,
 					       int chip);
 };
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index 11dc7e6..59637ac 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -491,7 +491,7 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
 	if ((diff0 & ~(1<<fls(diff0))) == 0)
 		return 1;
 
-	return -1;
+	return -EBADMSG;
 }
 
 /* ECC functions
@@ -774,9 +783,13 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
 	chip->select_chip  = s3c2410_nand_select_chip;
 	chip->chip_delay   = 50;
 	chip->priv	   = nmtd;
-	chip->options	   = 0;
 	chip->controller   = &info->controller;
 
+	if (set->flags & S3C2410_NAND_BBT)
+		chip->options	   = NAND_USE_FLASH_BBT;
+	else
+		chip->options	   = 0;
+
 	switch (info->cpu_type) {
 	case TYPE_S3C2410:
 		chip->IO_ADDR_W = regs + S3C2410_NFDATA;
@@ -816,7 +829,7 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
 	nmtd->mtd.owner    = THIS_MODULE;
 	nmtd->set	   = set;
 
-	if (hardware_ecc) {
+	if (!info->platform->software_ecc && hardware_ecc) {
 		chip->ecc.calculate = s3c2410_nand_calculate_ecc;
 		chip->ecc.correct   = s3c2410_nand_correct_data;
 		chip->ecc.mode	    = NAND_ECC_HW;