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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; | |
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__ */ |