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bf224335 PA |
1 | /* |
2 | * BCH Error Location Module | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
18 | #ifndef __ELM_H | |
19 | #define __ELM_H | |
20 | ||
21 | enum bch_ecc { | |
22 | BCH4_ECC = 0, | |
23 | BCH8_ECC, | |
2be589e4 | 24 | BCH16_ECC, |
bf224335 PA |
25 | }; |
26 | ||
27 | /* ELM support 8 error syndrome process */ | |
28 | #define ERROR_VECTOR_MAX 8 | |
29 | ||
bf224335 PA |
30 | /** |
31 | * struct elm_errorvec - error vector for elm | |
32 | * @error_reported: set true for vectors error is reported | |
33 | * @error_uncorrectable: number of uncorrectable errors | |
34 | * @error_count: number of correctable errors in the sector | |
35 | * @error_loc: buffer for error location | |
36 | * | |
37 | */ | |
38 | struct elm_errorvec { | |
39 | bool error_reported; | |
40 | bool error_uncorrectable; | |
41 | int error_count; | |
2be589e4 | 42 | int error_loc[16]; |
bf224335 PA |
43 | }; |
44 | ||
93af53b8 | 45 | #if IS_ENABLED(CONFIG_MTD_NAND_OMAP_BCH) |
bf224335 PA |
46 | void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, |
47 | struct elm_errorvec *err_vec); | |
3f4eb14b PG |
48 | int elm_config(struct device *dev, enum bch_ecc bch_type, |
49 | int ecc_steps, int ecc_step_size, int ecc_syndrome_size); | |
93af53b8 EG |
50 | #else |
51 | static inline void | |
52 | elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, | |
53 | struct elm_errorvec *err_vec) | |
54 | { | |
55 | } | |
56 | ||
57 | static inline int elm_config(struct device *dev, enum bch_ecc bch_type, | |
58 | int ecc_steps, int ecc_step_size, | |
59 | int ecc_syndrome_size) | |
60 | { | |
61 | return -ENOSYS; | |
62 | } | |
63 | #endif /* CONFIG_MTD_NAND_ECC_BCH */ | |
64 | ||
bf224335 | 65 | #endif /* __ELM_H */ |