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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
11enum 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 */
28struct 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)
36void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
37 struct elm_errorvec *err_vec);
38int elm_config(struct device *dev, enum bch_ecc bch_type,
39 int ecc_steps, int ecc_step_size, int ecc_syndrome_size);
40#else
41static inline void
42elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
43 struct elm_errorvec *err_vec)
44{
45}
46
47static 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

source code of linux/include/linux/platform_data/elm.h