direct/yaffs_nandif.h

   1 /*
   2  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
   3  *
   4  * Copyright (C) 2002-2011 Aleph One Ltd.
   5  *   for Toby Churchill Ltd and Brightstar Engineering
   6  *
   7  * Created by Charles Manning <charles@aleph1.co.uk>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU Lesser General Public License version 2.1 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  14  */
  15
  16
  17 #ifndef __YNANDIF_H__
  18 #define __YNANDIF_H__
  19
  20 #include "yaffs_guts.h"
  21
  22 struct ynandif_Geometry {
  23         unsigned start_block;
  24         unsigned end_block;
  25         unsigned dataSize;
  26         unsigned spareSize;
  27         unsigned pagesPerBlock;
  28         unsigned hasECC;
  29         unsigned inband_tags;
  30         unsigned useYaffs2;
  31
  32         int (*initialise)(struct yaffs_dev *dev);
  33         int (*deinitialise)(struct yaffs_dev *dev);
  34
  35         int (*readChunk) (struct yaffs_dev *dev,
  36                                           unsigned pageId,
  37                                           unsigned char *data,
  38                                           unsigned dataLength,
  39                                           unsigned char *spare,
  40                                           unsigned spareLength,
  41                                           int *eccStatus);
  42         /* ECC status is set to 0 for OK, 1 for fixed, -1 for unfixed. */
  43
  44         int (*writeChunk)(struct yaffs_dev *dev,
  45                                           unsigned pageId,
  46                                           const unsigned char *data,
  47                                           unsigned dataLength,
  48                                           const unsigned char *spare,
  49                                           unsigned spareLength);
  50
  51         int (*eraseBlock)(struct yaffs_dev *dev, unsigned blockId);
  52
  53         int (*checkBlockOk)(struct yaffs_dev *dev, unsigned blockId);
  54         int (*markBlockBad)(struct yaffs_dev *dev, unsigned blockId);
  55
  56         void *privateData;
  57
  58 };
  59
  60 struct yaffs_dev *
  61         yaffs_add_dev_from_geometry(const YCHAR *name,
  62                                         const struct ynandif_Geometry *geometry);
  63
  64
  65 #endif