| Ivan Djelic | 193bd40 | 2011-03-11 11:05:33 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This file is the header for the NAND BCH ECC implementation. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __MTD_NAND_BCH_H__ |
| 12 | #define __MTD_NAND_BCH_H__ |
| 13 | |
| 14 | struct mtd_info; |
| 15 | struct nand_bch_control; |
| 16 | |
| 17 | #if defined(CONFIG_MTD_NAND_ECC_BCH) |
| 18 | |
| 19 | static inline int mtd_nand_has_bch(void) { return 1; } |
| 20 | |
| 21 | /* |
| 22 | * Calculate BCH ecc code |
| 23 | */ |
| 24 | int nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat, |
| 25 | u_char *ecc_code); |
| 26 | |
| 27 | /* |
| 28 | * Detect and correct bit errors |
| 29 | */ |
| 30 | int nand_bch_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, |
| 31 | u_char *calc_ecc); |
| 32 | /* |
| 33 | * Initialize BCH encoder/decoder |
| 34 | */ |
| 35 | struct nand_bch_control * |
| 36 | nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, |
| 37 | unsigned int eccbytes, struct nand_ecclayout **ecclayout); |
| 38 | /* |
| 39 | * Release BCH encoder/decoder resources |
| 40 | */ |
| 41 | void nand_bch_free(struct nand_bch_control *nbc); |
| 42 | |
| 43 | #else /* !CONFIG_MTD_NAND_ECC_BCH */ |
| 44 | |
| 45 | static inline int mtd_nand_has_bch(void) { return 0; } |
| 46 | |
| 47 | static inline int |
| 48 | nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat, |
| 49 | u_char *ecc_code) |
| 50 | { |
| 51 | return -1; |
| 52 | } |
| 53 | |
| 54 | static inline int |
| 55 | nand_bch_correct_data(struct mtd_info *mtd, unsigned char *buf, |
| 56 | unsigned char *read_ecc, unsigned char *calc_ecc) |
| 57 | { |
| 58 | return -1; |
| 59 | } |
| 60 | |
| 61 | static inline struct nand_bch_control * |
| 62 | nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, |
| 63 | unsigned int eccbytes, struct nand_ecclayout **ecclayout) |
| 64 | { |
| 65 | return NULL; |
| 66 | } |
| 67 | |
| 68 | static inline void nand_bch_free(struct nand_bch_control *nbc) {} |
| 69 | |
| 70 | #endif /* CONFIG_MTD_NAND_ECC_BCH */ |
| 71 | |
| 72 | #endif /* __MTD_NAND_BCH_H__ */ |