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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, | |
24 | }; | |
25 | ||
26 | /* ELM support 8 error syndrome process */ | |
27 | #define ERROR_VECTOR_MAX 8 | |
28 | ||
29 | #define BCH8_ECC_OOB_BYTES 13 | |
30 | #define BCH4_ECC_OOB_BYTES 7 | |
31 | /* RBL requires 14 byte even though BCH8 uses only 13 byte */ | |
32 | #define BCH8_SIZE (BCH8_ECC_OOB_BYTES + 1) | |
62116e51 PA |
33 | /* Uses 1 extra byte to handle erased pages */ |
34 | #define BCH4_SIZE (BCH4_ECC_OOB_BYTES + 1) | |
bf224335 PA |
35 | |
36 | /** | |
37 | * struct elm_errorvec - error vector for elm | |
38 | * @error_reported: set true for vectors error is reported | |
39 | * @error_uncorrectable: number of uncorrectable errors | |
40 | * @error_count: number of correctable errors in the sector | |
41 | * @error_loc: buffer for error location | |
42 | * | |
43 | */ | |
44 | struct elm_errorvec { | |
45 | bool error_reported; | |
46 | bool error_uncorrectable; | |
47 | int error_count; | |
48 | int error_loc[ERROR_VECTOR_MAX]; | |
49 | }; | |
50 | ||
51 | void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, | |
52 | struct elm_errorvec *err_vec); | |
53 | void elm_config(struct device *dev, enum bch_ecc bch_type); | |
54 | #endif /* __ELM_H */ |