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
14struct mtd_info;
15struct nand_bch_control;
16
17#if defined(CONFIG_MTD_NAND_ECC_BCH)
18
19static inline int mtd_nand_has_bch(void) { return 1; }
20
21/*
22 * Calculate BCH ecc code
23 */
24int 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 */
30int 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 */
35struct nand_bch_control *
36nand_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 */
41void nand_bch_free(struct nand_bch_control *nbc);
42
43#else /* !CONFIG_MTD_NAND_ECC_BCH */
44
45static inline int mtd_nand_has_bch(void) { return 0; }
46
47static inline int
48nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
49		       u_char *ecc_code)
50{
51	return -1;
52}
53
54static inline int
55nand_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
61static inline struct nand_bch_control *
62nand_bch_init(struct mtd_info *mtd, unsigned int eccsize,
63	      unsigned int eccbytes, struct nand_ecclayout **ecclayout)
64{
65	return NULL;
66}
67
68static 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__ */
73