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_NAND_ECC_BCH)
18
mtd_nand_has_bch(void)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 *nand_bch_init(struct mtd_info *mtd);
36 /*
37 * Release BCH encoder/decoder resources
38 */
39 void nand_bch_free(struct nand_bch_control *nbc);
40
41 #else /* !CONFIG_NAND_ECC_BCH */
42
mtd_nand_has_bch(void)43 static inline int mtd_nand_has_bch(void) { return 0; }
44
45 static inline int
nand_bch_calculate_ecc(struct mtd_info * mtd,const u_char * dat,u_char * ecc_code)46 nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
47 u_char *ecc_code)
48 {
49 return -1;
50 }
51
52 static inline int
nand_bch_correct_data(struct mtd_info * mtd,unsigned char * buf,unsigned char * read_ecc,unsigned char * calc_ecc)53 nand_bch_correct_data(struct mtd_info *mtd, unsigned char *buf,
54 unsigned char *read_ecc, unsigned char *calc_ecc)
55 {
56 return -ENOTSUPP;
57 }
58
nand_bch_init(struct mtd_info * mtd)59 static inline struct nand_bch_control *nand_bch_init(struct mtd_info *mtd)
60 {
61 return NULL;
62 }
63
nand_bch_free(struct nand_bch_control * nbc)64 static inline void nand_bch_free(struct nand_bch_control *nbc) {}
65
66 #endif /* CONFIG_NAND_ECC_BCH */
67
68 #endif /* __MTD_NAND_BCH_H__ */
69