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
21enum 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 */
38struct 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)
46void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
47		struct elm_errorvec *err_vec);
48int elm_config(struct device *dev, enum bch_ecc bch_type,
49	int ecc_steps, int ecc_step_size, int ecc_syndrome_size);
50#else
51static inline void
52elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
53			  struct elm_errorvec *err_vec)
54{
55}
56
57static 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