| /* |
| * BCH Error Location Module |
| * |
| * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #ifndef __ELM_H |
| #define __ELM_H |
| |
| enum bch_ecc { |
| BCH4_ECC = 0, |
| BCH8_ECC, |
| }; |
| |
| /* ELM support 8 error syndrome process */ |
| #define ERROR_VECTOR_MAX 8 |
| |
| #define BCH8_ECC_OOB_BYTES 13 |
| #define BCH4_ECC_OOB_BYTES 7 |
| /* RBL requires 14 byte even though BCH8 uses only 13 byte */ |
| #define BCH8_SIZE (BCH8_ECC_OOB_BYTES + 1) |
| /* Uses 1 extra byte to handle erased pages */ |
| #define BCH4_SIZE (BCH4_ECC_OOB_BYTES + 1) |
| |
| /** |
| * struct elm_errorvec - error vector for elm |
| * @error_reported: set true for vectors error is reported |
| * @error_uncorrectable: number of uncorrectable errors |
| * @error_count: number of correctable errors in the sector |
| * @error_loc: buffer for error location |
| * |
| */ |
| struct elm_errorvec { |
| bool error_reported; |
| bool error_uncorrectable; |
| int error_count; |
| int error_loc[ERROR_VECTOR_MAX]; |
| }; |
| |
| void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, |
| struct elm_errorvec *err_vec); |
| int elm_config(struct device *dev, enum bch_ecc bch_type); |
| #endif /* __ELM_H */ |
