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193bd400 ID |
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; | |
af37d2c3 | 15 | struct nand_chip; |
193bd400 ID |
16 | struct nand_bch_control; |
17 | ||
18 | #if defined(CONFIG_MTD_NAND_ECC_BCH) | |
19 | ||
20 | static inline int mtd_nand_has_bch(void) { return 1; } | |
21 | ||
22 | /* | |
23 | * Calculate BCH ecc code | |
24 | */ | |
af37d2c3 | 25 | int nand_bch_calculate_ecc(struct nand_chip *chip, const u_char *dat, |
193bd400 ID |
26 | u_char *ecc_code); |
27 | ||
28 | /* | |
29 | * Detect and correct bit errors | |
30 | */ | |
00da2ea9 BB |
31 | int nand_bch_correct_data(struct nand_chip *chip, u_char *dat, |
32 | u_char *read_ecc, u_char *calc_ecc); | |
193bd400 ID |
33 | /* |
34 | * Initialize BCH encoder/decoder | |
35 | */ | |
a8c65d50 | 36 | struct nand_bch_control *nand_bch_init(struct mtd_info *mtd); |
193bd400 ID |
37 | /* |
38 | * Release BCH encoder/decoder resources | |
39 | */ | |
40 | void nand_bch_free(struct nand_bch_control *nbc); | |
41 | ||
42 | #else /* !CONFIG_MTD_NAND_ECC_BCH */ | |
43 | ||
44 | static inline int mtd_nand_has_bch(void) { return 0; } | |
45 | ||
46 | static inline int | |
af37d2c3 | 47 | nand_bch_calculate_ecc(struct nand_chip *chip, const u_char *dat, |
193bd400 ID |
48 | u_char *ecc_code) |
49 | { | |
50 | return -1; | |
51 | } | |
52 | ||
53 | static inline int | |
00da2ea9 | 54 | nand_bch_correct_data(struct nand_chip *chip, unsigned char *buf, |
193bd400 ID |
55 | unsigned char *read_ecc, unsigned char *calc_ecc) |
56 | { | |
6e941192 | 57 | return -ENOTSUPP; |
193bd400 ID |
58 | } |
59 | ||
a8c65d50 | 60 | static inline struct nand_bch_control *nand_bch_init(struct mtd_info *mtd) |
193bd400 ID |
61 | { |
62 | return NULL; | |
63 | } | |
64 | ||
65 | static inline void nand_bch_free(struct nand_bch_control *nbc) {} | |
66 | ||
67 | #endif /* CONFIG_MTD_NAND_ECC_BCH */ | |
68 | ||
69 | #endif /* __MTD_NAND_BCH_H__ */ |