drivers/mtd/nand/raw/atmel/pmecc.h

   1 /*
   2  * © Copyright 2016 ATMEL
   3  * © Copyright 2016 Free Electrons
   4  *
   5  * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
   6  *
   7  * Derived from the atmel_nand.c driver which contained the following
   8  * copyrights:
   9  *
  10  *    Copyright © 2003 Rick Bronson
  11  *
  12  *    Derived from drivers/mtd/nand/autcpu12.c (removed in v3.8)
  13  *        Copyright © 2001 Thomas Gleixner (gleixner@autronix.de)
  14  *
  15  *    Derived from drivers/mtd/spia.c (removed in v3.8)
  16  *        Copyright © 2000 Steven J. Hill (sjhill@cotw.com)
  17  *
  18  *
  19  *    Add Hardware ECC support for AT91SAM9260 / AT91SAM9263
  20  *        Richard Genoud (richard.genoud@gmail.com), Adeneo Copyright © 2007
  21  *
  22  *        Derived from Das U-Boot source code
  23  *              (u-boot-1.1.5/board/atmel/at91sam9263ek/nand.c)
  24  *        © Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
  25  *
  26  *    Add Programmable Multibit ECC support for various AT91 SoC
  27  *        © Copyright 2012 ATMEL, Hong Xu
  28  *
  29  *    Add Nand Flash Controller support for SAMA5 SoC
  30  *        © Copyright 2013 ATMEL, Josh Wu (josh.wu@atmel.com)
  31  *
  32  * This program is free software; you can redistribute it and/or modify
  33  * it under the terms of the GNU General Public License version 2 as
  34  * published by the Free Software Foundation.
  35  *
  36  */
  37
  38 #ifndef ATMEL_PMECC_H
  39 #define ATMEL_PMECC_H
  40
  41 #define ATMEL_PMECC_MAXIMIZE_ECC_STRENGTH       0
  42 #define ATMEL_PMECC_SECTOR_SIZE_AUTO            0
  43 #define ATMEL_PMECC_OOBOFFSET_AUTO              -1
  44
  45 struct atmel_pmecc_user_req {
  46         int pagesize;
  47         int oobsize;
  48         struct {
  49                 int strength;
  50                 int bytes;
  51                 int sectorsize;
  52                 int nsectors;
  53                 int ooboffset;
  54         } ecc;
  55 };
  56
  57 struct atmel_pmecc *devm_atmel_pmecc_get(struct device *dev);
  58
  59 struct atmel_pmecc_user *
  60 atmel_pmecc_create_user(struct atmel_pmecc *pmecc,
  61                         struct atmel_pmecc_user_req *req);
  62 void atmel_pmecc_destroy_user(struct atmel_pmecc_user *user);
  63
  64 void atmel_pmecc_reset(struct atmel_pmecc *pmecc);
  65 int atmel_pmecc_enable(struct atmel_pmecc_user *user, int op);
  66 void atmel_pmecc_disable(struct atmel_pmecc_user *user);
  67 int atmel_pmecc_wait_rdy(struct atmel_pmecc_user *user);
  68 int atmel_pmecc_correct_sector(struct atmel_pmecc_user *user, int sector,
  69                                void *data, void *ecc);
  70 bool atmel_pmecc_correct_erased_chunks(struct atmel_pmecc_user *user);
  71 void atmel_pmecc_get_generated_eccbytes(struct atmel_pmecc_user *user,
  72                                         int sector, void *ecc);
  73
  74 #endif /* ATMEL_PMECC_H */