include/linux/mtd/nand-ecc-sw-bch.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com>
   4  *
   5  * This file is the header for the NAND BCH ECC implementation.
   6  */
   7
   8 #ifndef __MTD_NAND_ECC_SW_BCH_H__
   9 #define __MTD_NAND_ECC_SW_BCH_H__
  10
  11 struct mtd_info;
  12 struct nand_chip;
  13
  14 #if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)
  15
  16 /*
  17  * Calculate BCH ecc code
  18  */
  19 int nand_bch_calculate_ecc(struct nand_chip *chip, const u_char *dat,
  20                            u_char *ecc_code);
  21
  22 /*
  23  * Detect and correct bit errors
  24  */
  25 int nand_bch_correct_data(struct nand_chip *chip, u_char *dat,
  26                           u_char *read_ecc, u_char *calc_ecc);
  27 /*
  28  * Initialize BCH encoder/decoder
  29  */
  30 int nand_bch_init(struct nand_chip *chip);
  31 /*
  32  * Release BCH encoder/decoder resources
  33  */
  34 void nand_bch_free(struct nand_chip *chip);
  35
  36 #else /* !CONFIG_MTD_NAND_ECC_SW_BCH */
  37
  38 static inline int
  39 nand_bch_calculate_ecc(struct nand_chip *chip, const u_char *dat,
  40                        u_char *ecc_code)
  41 {
  42         return -ENOTSUPP;
  43 }
  44
  45 static inline int
  46 nand_bch_correct_data(struct nand_chip *chip, unsigned char *buf,
  47                       unsigned char *read_ecc, unsigned char *calc_ecc)
  48 {
  49         return -ENOTSUPP;
  50 }
  51
  52 static inline int nand_bch_init(struct nand_chip *chip)
  53 {
  54         return -ENOTSUPP;
  55 }
  56
  57 static inline void nand_bch_free(struct nand_chip *chip) {}
  58
  59 #endif /* CONFIG_MTD_NAND_ECC_SW_BCH */
  60
  61 #endif /* __MTD_NAND_ECC_SW_BCH_H__ */