include/linux/platform_data/elm.h

   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 */