1 /* 2 * drivers/mtd/nand_ecc.h 3 * 4 * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.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 version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This file is the header for the ECC algorithm. 11 */ 12 13 #ifndef __MTD_NAND_ECC_H__ 14 #define __MTD_NAND_ECC_H__ 15 16 struct mtd_info; 17 18 #if defined(CONFIG_MTD_ECC_SOFT) 19 20 static inline int mtd_nand_has_ecc_soft(void) { return 1; } 21 22 /* 23 * Calculate 3 byte ECC code for 256 byte block 24 */ 25 int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code); 26 27 /* 28 * Detect and correct a 1 bit error for 256 byte block 29 */ 30 int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc); 31 32 #else 33 34 static inline int mtd_nand_has_ecc_soft(void) { return 0; } 35 36 static inline int 37 nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code) 38 { 39 return -1; 40 } 41 42 static inline int 43 nand_correct_data(struct mtd_info *mtd, 44 u_char *dat, 45 u_char *read_ecc, 46 u_char *calc_ecc) 47 { 48 return -1; 49 } 50 51 #endif 52 53 #endif /* __MTD_NAND_ECC_H__ */ 54