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/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2010 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_tagsvalidity.h"
#include "yaffs_getblockinfo.h"
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 realigned_chunk = nand_chunk - dev->chunk_offset;
dev->n_page_reads++;
/* If there are no tags provided, use local tags to get prioritised gc working */
if (!tags)
tags = &local_tags;
if (dev->param.read_chunk_tags_fn)
result =
dev->param.read_chunk_tags_fn(dev, realigned_chunk, buffer,
tags);
else
result = yaffs_tags_compat_rd(dev,
realigned_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)
{
dev->n_page_writes++;
nand_chunk -= dev->chunk_offset;
if (tags) {
tags->seq_number = dev->seq_number;
tags->chunk_used = 1;
if (!yaffs_validate_tags(tags)) {
yaffs_trace(YAFFS_TRACE_ERROR, "Writing uninitialised tags");
YBUG();
}
yaffs_trace(YAFFS_TRACE_WRITE,
"Writing chunk %d tags %d %d",
nand_chunk, tags->obj_id, tags->chunk_id);
} else {
yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
YBUG();
}
if (dev->param.write_chunk_tags_fn)
return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
tags);
else
return yaffs_tags_compat_wr(dev, nand_chunk, buffer, tags);
}
int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
{
block_no -= dev->block_offset;
if (dev->param.bad_block_fn)
return dev->param.bad_block_fn(dev, block_no);
else
return yaffs_tags_compat_mark_bad(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;
if (dev->param.query_block_fn)
return dev->param.query_block_fn(dev, block_no, state,
seq_number);
else
return yaffs_tags_compat_query_block(dev, block_no,
state, seq_number);
}
int yaffs_erase_block(struct yaffs_dev *dev, int flash_block)
{
int result;
flash_block -= dev->block_offset;
dev->n_erasures++;
result = dev->param.erase_fn(dev, flash_block);
return result;
}
int yaffs_init_nand(struct yaffs_dev *dev)
{
if (dev->param.initialise_flash_fn)
return dev->param.initialise_flash_fn(dev);
return YAFFS_OK;
}
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