1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * BCH Error Location Module |
4 | * |
5 | * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/ |
6 | */ |
7 | |
8 | #ifndef __ELM_H |
9 | #define __ELM_H |
10 | |
11 | enum bch_ecc { |
12 | BCH4_ECC = 0, |
13 | BCH8_ECC, |
14 | BCH16_ECC, |
15 | }; |
16 | |
17 | /* ELM support 8 error syndrome process */ |
18 | #define ERROR_VECTOR_MAX 8 |
19 | |
20 | /** |
21 | * struct elm_errorvec - error vector for elm |
22 | * @error_reported: set true for vectors error is reported |
23 | * @error_uncorrectable: number of uncorrectable errors |
24 | * @error_count: number of correctable errors in the sector |
25 | * @error_loc: buffer for error location |
26 | * |
27 | */ |
28 | struct elm_errorvec { |
29 | bool error_reported; |
30 | bool error_uncorrectable; |
31 | int error_count; |
32 | int error_loc[16]; |
33 | }; |
34 | |
35 | #if IS_ENABLED(CONFIG_MTD_NAND_OMAP_BCH) |
36 | void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, |
37 | struct elm_errorvec *err_vec); |
38 | int elm_config(struct device *dev, enum bch_ecc bch_type, |
39 | int ecc_steps, int ecc_step_size, int ecc_syndrome_size); |
40 | #else |
41 | static inline void |
42 | elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, |
43 | struct elm_errorvec *err_vec) |
44 | { |
45 | } |
46 | |
47 | static inline int elm_config(struct device *dev, enum bch_ecc bch_type, |
48 | int ecc_steps, int ecc_step_size, |
49 | int ecc_syndrome_size) |
50 | { |
51 | return -ENOSYS; |
52 | } |
53 | #endif /* CONFIG_MTD_NAND_OMAP_BCH */ |
54 | |
55 | #endif /* __ELM_H */ |
56 | |