LXR uboot/fs/yaffs2/yaffs

   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 General Public License version 2 as
  11 * published by the Free Software Foundation.
  12 */
  13
  14#include "yaffs_nand.h"
  15#include "yaffs_tagscompat.h"
  16
  17#include "yaffs_getblockinfo.h"
  18#include "yaffs_summary.h"
  19
  20int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
  21                             u8 *buffer, struct yaffs_ext_tags *tags)
  22{
  23        int result;
  24        struct yaffs_ext_tags local_tags;
  25        int flash_chunk = nand_chunk - dev->chunk_offset;
  26
  27        dev->n_page_reads++;
  28
  29        /* If there are no tags provided use local tags. */
  30        if (!tags)
  31                tags = &local_tags;
  32
  33        if (dev->param.read_chunk_tags_fn)
  34                result =
  35                    dev->param.read_chunk_tags_fn(dev, flash_chunk, buffer,
  36                                                  tags);
  37        else
  38                result = yaffs_tags_compat_rd(dev,
  39                                              flash_chunk, buffer, tags);
  40        if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
  41
  42                struct yaffs_block_info *bi;
  43                bi = yaffs_get_block_info(dev,
  44                                          nand_chunk /
  45                                          dev->param.chunks_per_block);
  46                yaffs_handle_chunk_error(dev, bi);
  47        }
  48        return result;
  49}
  50
  51int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
  52                                int nand_chunk,
  53                                const u8 *buffer, struct yaffs_ext_tags *tags)
  54{
  55        int result;
  56        int flash_chunk = nand_chunk - dev->chunk_offset;
  57
  58        dev->n_page_writes++;
  59
  60        if (tags) {
  61                tags->seq_number = dev->seq_number;
  62                tags->chunk_used = 1;
  63                yaffs_trace(YAFFS_TRACE_WRITE,
  64                        "Writing chunk %d tags %d %d",
  65                        nand_chunk, tags->obj_id, tags->chunk_id);
  66        } else {
  67                yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
  68                BUG();
  69                return YAFFS_FAIL;
  70        }
  71
  72        if (dev->param.write_chunk_tags_fn)
  73                result = dev->param.write_chunk_tags_fn(dev, flash_chunk,
  74                                                        buffer, tags);
  75        else
  76                result = yaffs_tags_compat_wr(dev, flash_chunk, buffer, tags);
  77
  78        yaffs_summary_add(dev, tags, nand_chunk);
  79
  80        return result;
  81}
  82
  83int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
  84{
  85        block_no -= dev->block_offset;
  86        if (dev->param.bad_block_fn)
  87                return dev->param.bad_block_fn(dev, block_no);
  88
  89        return yaffs_tags_compat_mark_bad(dev, block_no);
  90}
  91
  92int yaffs_query_init_block_state(struct yaffs_dev *dev,
  93                                 int block_no,
  94                                 enum yaffs_block_state *state,
  95                                 u32 *seq_number)
  96{
  97        block_no -= dev->block_offset;
  98        if (dev->param.query_block_fn)
  99                return dev->param.query_block_fn(dev, block_no, state,
 100                                                 seq_number);
 101
 102        return yaffs_tags_compat_query_block(dev, block_no, state, seq_number);
 103}
 104
 105int yaffs_erase_block(struct yaffs_dev *dev, int flash_block)
 106{
 107        int result;
 108
 109        flash_block -= dev->block_offset;
 110        dev->n_erasures++;
 111        result = dev->param.erase_fn(dev, flash_block);
 112        return result;
 113}
 114
 115int yaffs_init_nand(struct yaffs_dev *dev)
 116{
 117        if (dev->param.initialise_flash_fn)
 118                return dev->param.initialise_flash_fn(dev);
 119        return YAFFS_OK;
 120}
 121