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 52 elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc, 53 struct elm_errorvec *err_vec) 54 { 55 } 56 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