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/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2011 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "yaffs_nand.h"
#include "yaffs_tagscompat.h"
#include "yaffs_getblockinfo.h"
#include "yaffs_summary.h"
static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
{
return chunk - dev->chunk_offset;
}
int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
u8 *buffer, struct yaffs_ext_tags *tags)
{
int result;
struct yaffs_ext_tags local_tags;
int flash_chunk = apply_chunk_offset(dev, nand_chunk);
dev->n_page_reads++;
/* If there are no tags provided use local tags. */
if (!tags)
tags = &local_tags;
result = dev->tagger.read_chunk_tags_fn(dev, flash_chunk, buffer, tags);
if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
struct yaffs_block_info *bi;
bi = yaffs_get_block_info(dev,
nand_chunk /
dev->param.chunks_per_block);
yaffs_handle_chunk_error(dev, bi);
}
return result;
}
int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
int nand_chunk,
const u8 *buffer, struct yaffs_ext_tags *tags)
{
int result;
int flash_chunk = apply_chunk_offset(dev, nand_chunk);
dev->n_page_writes++;
if (!tags) {
yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
BUG();
return YAFFS_FAIL;
}
tags->seq_number = dev->seq_number;
tags->chunk_used = 1;
yaffs_trace(YAFFS_TRACE_WRITE,
"Writing chunk %d tags %d %d",
nand_chunk, tags->obj_id, tags->chunk_id);
result = dev->tagger.write_chunk_tags_fn(dev, flash_chunk,
buffer, tags);
yaffs_summary_add(dev, tags, nand_chunk);
return result;
}
int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
{
block_no -= dev->block_offset;
dev->n_bad_markings++;
if (dev->param.disable_bad_block_marking)
return YAFFS_OK;
return dev->tagger.mark_bad_fn(dev, block_no);
}
int yaffs_query_init_block_state(struct yaffs_dev *dev,
int block_no,
enum yaffs_block_state *state,
u32 *seq_number)
{
block_no -= dev->block_offset;
return dev->tagger.query_block_fn(dev, block_no, state, seq_number);
}
int yaffs_erase_block(struct yaffs_dev *dev, int block_no)
{
int result;
block_no -= dev->block_offset;
dev->n_erasures++;
result = dev->drv.drv_erase_fn(dev, block_no);
return result;
}
int yaffs_init_nand(struct yaffs_dev *dev)
{
if (dev->drv.drv_initialise_fn)
return dev->drv.drv_initialise_fn(dev);
return YAFFS_OK;
}
int yaffs_deinit_nand(struct yaffs_dev *dev)
{
if (dev->drv.drv_deinitialise_fn)
return dev->drv.drv_deinitialise_fn(dev);
return YAFFS_OK;
}
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