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