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 BCH16_ECC,
25 };
26
27 /* ELM support 8 error syndrome process */
28 #define ERROR_VECTOR_MAX 8
29
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;
42 int error_loc[16];
43 };
44
45 #if IS_ENABLED(CONFIG_MTD_NAND_OMAP_BCH)
46 void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
47 struct elm_errorvec *err_vec);
48 int elm_config(struct device *dev, enum bch_ecc bch_type,
49 int ecc_steps, int ecc_step_size, int ecc_syndrome_size);
50 #else
51 static inline void
elm_decode_bch_error_page(struct device * dev,u8 * ecc_calc,struct elm_errorvec * err_vec)52 elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
53 struct elm_errorvec *err_vec)
54 {
55 }
56
elm_config(struct device * dev,enum bch_ecc bch_type,int ecc_steps,int ecc_step_size,int ecc_syndrome_size)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
65 #endif /* __ELM_H */
66