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140 lines
3.1 KiB
140 lines
3.1 KiB
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2010 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "yaffs_nand.h"
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#include "yaffs_tagscompat.h"
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#include "yaffs_tagsvalidity.h"
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#include "yaffs_getblockinfo.h"
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int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk,
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__u8 *buffer,
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yaffs_ext_tags *tags)
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{
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int result;
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yaffs_ext_tags localTags;
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int realignedChunkInNAND = nand_chunk - dev->chunk_offset;
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dev->n_page_reads++;
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/* If there are no tags provided, use local tags to get prioritised gc working */
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if (!tags)
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tags = &localTags;
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if (dev->param.read_chunk_tags_fn)
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result = dev->param.read_chunk_tags_fn(dev, realignedChunkInNAND, buffer,
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tags);
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else
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result = yaffs_tags_compat_rd(dev,
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realignedChunkInNAND,
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buffer,
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tags);
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if (tags &&
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tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
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yaffs_block_info_t *bi;
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bi = yaffs_get_block_info(dev, nand_chunk/dev->param.chunks_per_block);
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yaffs_handle_chunk_error(dev, bi);
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}
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return result;
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}
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int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev,
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int nand_chunk,
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const __u8 *buffer,
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yaffs_ext_tags *tags)
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{
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dev->n_page_writes++;
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nand_chunk -= dev->chunk_offset;
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if (tags) {
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tags->seq_number = dev->seq_number;
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tags->chunk_used = 1;
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if (!yaffs_validate_tags(tags)) {
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T(YAFFS_TRACE_ERROR,
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(TSTR("Writing uninitialised tags" TENDSTR)));
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YBUG();
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}
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T(YAFFS_TRACE_WRITE,
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(TSTR("Writing chunk %d tags %d %d" TENDSTR), nand_chunk,
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tags->obj_id, tags->chunk_id));
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} else {
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T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
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YBUG();
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}
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if (dev->param.write_chunk_tags_fn)
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return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
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tags);
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else
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return yaffs_tags_compat_wr(dev,
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nand_chunk,
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buffer,
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tags);
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}
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int yaffs_mark_bad(yaffs_dev_t *dev, int block_no)
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{
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block_no -= dev->block_offset;
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if (dev->param.bad_block_fn)
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return dev->param.bad_block_fn(dev, block_no);
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else
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return yaffs_tags_compat_mark_bad(dev, block_no);
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}
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int yaffs_query_init_block_state(yaffs_dev_t *dev,
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int block_no,
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yaffs_block_state_t *state,
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__u32 *seq_number)
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{
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block_no -= dev->block_offset;
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if (dev->param.query_block_fn)
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return dev->param.query_block_fn(dev, block_no, state, seq_number);
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else
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return yaffs_tags_compat_query_block(dev, block_no,
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state,
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seq_number);
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}
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int yaffs_erase_block(struct yaffs_dev_s *dev,
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int flash_block)
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{
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int result;
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flash_block -= dev->block_offset;
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dev->n_erasures++;
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result = dev->param.erase_fn(dev, flash_block);
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return result;
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}
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int yaffs_init_nand(struct yaffs_dev_s *dev)
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{
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if(dev->param.initialise_flash_fn)
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return dev->param.initialise_flash_fn(dev);
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return YAFFS_OK;
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}
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