2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2010 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
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.
14 #include "yaffs_nand.h"
15 #include "yaffs_tagscompat.h"
16 #include "yaffs_tagsvalidity.h"
18 #include "yaffs_getblockinfo.h"
20 int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
21 u8 *buffer, struct yaffs_ext_tags *tags)
24 struct yaffs_ext_tags local_tags;
25 int realigned_chunk = nand_chunk - dev->chunk_offset;
29 /* If there are no tags provided use local tags. */
33 if (dev->param.read_chunk_tags_fn)
35 dev->param.read_chunk_tags_fn(dev, realigned_chunk, buffer,
38 result = yaffs_tags_compat_rd(dev,
39 realigned_chunk, buffer, tags);
40 if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
42 struct yaffs_block_info *bi;
43 bi = yaffs_get_block_info(dev,
45 dev->param.chunks_per_block);
46 yaffs_handle_chunk_error(dev, bi);
51 int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
53 const u8 *buffer, struct yaffs_ext_tags *tags)
56 nand_chunk -= dev->chunk_offset;
59 tags->seq_number = dev->seq_number;
61 if (!yaffs_validate_tags(tags)) {
62 yaffs_trace(YAFFS_TRACE_ERROR,
63 "Writing uninitialised tags");
66 yaffs_trace(YAFFS_TRACE_WRITE,
67 "Writing chunk %d tags %d %d",
68 nand_chunk, tags->obj_id, tags->chunk_id);
70 yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
75 if (dev->param.write_chunk_tags_fn)
76 return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
79 return yaffs_tags_compat_wr(dev, nand_chunk, buffer, tags);
82 int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
84 block_no -= dev->block_offset;
85 if (dev->param.bad_block_fn)
86 return dev->param.bad_block_fn(dev, block_no);
88 return yaffs_tags_compat_mark_bad(dev, block_no);
91 int yaffs_query_init_block_state(struct yaffs_dev *dev,
93 enum yaffs_block_state *state,
96 block_no -= dev->block_offset;
97 if (dev->param.query_block_fn)
98 return dev->param.query_block_fn(dev, block_no, state,
101 return yaffs_tags_compat_query_block(dev, block_no,
105 int yaffs_erase_block(struct yaffs_dev *dev, int flash_block)
109 flash_block -= dev->block_offset;
111 result = dev->param.erase_fn(dev, flash_block);
115 int yaffs_init_nand(struct yaffs_dev *dev)
117 if (dev->param.initialise_flash_fn)
118 return dev->param.initialise_flash_fn(dev);