/* * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This file is the header for the NAND BCH ECC implementation. */ #ifndef __MTD_NAND_BCH_H__ #define __MTD_NAND_BCH_H__ struct mtd_info; struct nand_chip; struct nand_bch_control; #if defined(CONFIG_MTD_NAND_ECC_BCH) static inline int mtd_nand_has_bch(void) { return 1; } /* * Calculate BCH ecc code */ int nand_bch_calculate_ecc(struct nand_chip *chip, const u_char *dat, u_char *ecc_code); /* * Detect and correct bit errors */ int nand_bch_correct_data(struct nand_chip *chip, u_char *dat, u_char *read_ecc, u_char *calc_ecc); /* * Initialize BCH encoder/decoder */ struct nand_bch_control *nand_bch_init(struct mtd_info *mtd); /* * Release BCH encoder/decoder resources */ void nand_bch_free(struct nand_bch_control *nbc); #else /* !CONFIG_MTD_NAND_ECC_BCH */ static inline int mtd_nand_has_bch(void) { return 0; } static inline int nand_bch_calculate_ecc(struct nand_chip *chip, const u_char *dat, u_char *ecc_code) { return -1; } static inline int nand_bch_correct_data(struct nand_chip *chip, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc) { return -ENOTSUPP; } static inline struct nand_bch_control *nand_bch_init(struct mtd_info *mtd) { return NULL; } static inline void nand_bch_free(struct nand_bch_control *nbc) {} #endif /* CONFIG_MTD_NAND_ECC_BCH */ #endif /* __MTD_NAND_BCH_H__ */