| /* |
| * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This file is the header for the NAND BCH ECC implementation. |
| */ |
| |
| #ifndef __MTD_NAND_BCH_H__ |
| #define __MTD_NAND_BCH_H__ |
| |
| struct mtd_info; |
| struct nand_bch_control; |
| #define CONFIG_NAND_ECC_BCH |
| |
| #if defined(CONFIG_NAND_ECC_BCH) |
| |
| static inline int mtd_nand_has_bch(void) { return 1; } |
| |
| /* |
| * Calculate BCH ecc code |
| */ |
| int nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat, |
| u_char *ecc_code); |
| |
| /* |
| * Detect and correct bit errors |
| */ |
| int nand_bch_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, |
| u_char *calc_ecc); |
| /* |
| * Initialize BCH encoder/decoder |
| */ |
| struct nand_bch_control * |
| nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, |
| unsigned int eccbytes, struct nand_ecclayout **ecclayout); |
| /* |
| * Release BCH encoder/decoder resources |
| */ |
| void nand_bch_free(struct nand_bch_control *nbc); |
| |
| #else /* !CONFIG_NAND_ECC_BCH */ |
| |
| static inline int mtd_nand_has_bch(void) { return 0; } |
| |
| static inline int |
| nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat, |
| u_char *ecc_code) |
| { |
| return -1; |
| } |
| |
| static inline int |
| nand_bch_correct_data(struct mtd_info *mtd, unsigned char *buf, |
| unsigned char *read_ecc, unsigned char *calc_ecc) |
| { |
| return -1; |
| } |
| |
| static inline struct nand_bch_control * |
| nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, |
| unsigned int eccbytes, struct nand_ecclayout **ecclayout) |
| { |
| return NULL; |
| } |
| |
| static inline void nand_bch_free(struct nand_bch_control *nbc) {} |
| |
| #endif /* CONFIG_NAND_ECC_BCH */ |
| |
| #endif /* __MTD_NAND_BCH_H__ */ |