diff options
| -rw-r--r-- | drivers/mtd/nand/nand_ecc.c | 31 | ||||
| -rw-r--r-- | include/linux/mtd/nand_ecc.h | 6 |
2 files changed, 30 insertions, 7 deletions
diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c index c0cb87d..db7ae9d 100644 --- a/drivers/mtd/nand/nand_ecc.c +++ b/drivers/mtd/nand/nand_ecc.c @@ -417,22 +417,22 @@ int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, EXPORT_SYMBOL(nand_calculate_ecc); /** - * nand_correct_data - [NAND Interface] Detect and correct bit error(s) - * @mtd: MTD block structure + * __nand_correct_data - [NAND Interface] Detect and correct bit error(s) * @buf: raw data read from the chip * @read_ecc: ECC from the chip * @calc_ecc: the ECC calculated from raw data + * @eccsize: data bytes per ecc step (256 or 512) * - * Detect and correct a 1 bit error for 256/512 byte block + * Detect and correct a 1 bit error for eccsize byte block */ -int nand_correct_data(struct mtd_info *mtd, unsigned char *buf, - unsigned char *read_ecc, unsigned char *calc_ecc) +int __nand_correct_data(unsigned char *buf, + unsigned char *read_ecc, unsigned char *calc_ecc, + unsigned int eccsize) { unsigned char b0, b1, b2, bit_addr; unsigned int byte_addr; /* 256 or 512 bytes/ecc */ - const uint32_t eccsize_mult = - (((struct nand_chip *)mtd->priv)->ecc.size) >> 8; + const uint32_t eccsize_mult = eccsize >> 8; /* * b0 to b2 indicate which bit is faulty (if any) @@ -495,6 +495,23 @@ int nand_correct_data(struct mtd_info *mtd, unsigned char *buf, printk(KERN_ERR "uncorrectable error : "); return -1; } +EXPORT_SYMBOL(__nand_correct_data); + +/** + * nand_correct_data - [NAND Interface] Detect and correct bit error(s) + * @mtd: MTD block structure + * @buf: raw data read from the chip + * @read_ecc: ECC from the chip + * @calc_ecc: the ECC calculated from raw data + * + * Detect and correct a 1 bit error for 256/512 byte block + */ +int nand_correct_data(struct mtd_info *mtd, unsigned char *buf, + unsigned char *read_ecc, unsigned char *calc_ecc) +{ + return __nand_correct_data(buf, read_ecc, calc_ecc, + ((struct nand_chip *)mtd->priv)->ecc.size); +} EXPORT_SYMBOL(nand_correct_data); MODULE_LICENSE("GPL"); diff --git a/include/linux/mtd/nand_ecc.h b/include/linux/mtd/nand_ecc.h index 090da50..052ea8c 100644 --- a/include/linux/mtd/nand_ecc.h +++ b/include/linux/mtd/nand_ecc.h @@ -21,6 +21,12 @@ struct mtd_info; int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code); /* + * Detect and correct a 1 bit error for eccsize byte block + */ +int __nand_correct_data(u_char *dat, u_char *read_ecc, u_char *calc_ecc, + unsigned int eccsize); + +/* * Detect and correct a 1 bit error for 256 byte block */ int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc); |
