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 }; 25 26 /* ELM support 8 error syndrome process */ 27 #define ERROR_VECTOR_MAX 8 28 29 #define BCH8_ECC_OOB_BYTES 13 30 #define BCH4_ECC_OOB_BYTES 7 31 /* RBL requires 14 byte even though BCH8 uses only 13 byte */ 32 #define BCH8_SIZE (BCH8_ECC_OOB_BYTES + 1) 33 #define BCH4_SIZE (BCH4_ECC_OOB_BYTES) 34 35 /** 36 * struct elm_errorvec - error vector for elm 37 * @error_reported: set true for vectors error is reported 38 * @error_uncorrectable: number of uncorrectable errors 39 * @error_count: number of correctable errors in the sector 40 * @error_loc: buffer for error location 41 * 42 */ 43 struct elm_errorvec { 44 bool error_reported; 45 bool error_uncorrectable; 46 int error_count; 47 int error_loc[ERROR_VECTOR_MAX]; 48 }; 49 50 void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, 51 struct elm_errorvec *err_vec); 52 void elm_config(struct device *dev, enum bch_ecc bch_type); 53 #endif /* __ELM_H */ 54