LXR linux/include/linux/platform

   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
  21enum 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 */
  38struct 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)
  46void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
  47                struct elm_errorvec *err_vec);
  48int elm_config(struct device *dev, enum bch_ecc bch_type,
  49        int ecc_steps, int ecc_step_size, int ecc_syndrome_size);
  50#else
  51static inline void
  52elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
  53                          struct elm_errorvec *err_vec)
  54{
  55}
  56
  57static 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