1/*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2010 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#include "yaffs_tagsvalidity.h"
17
18#include "yaffs_getblockinfo.h"
19
20int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk,
21					   __u8 *buffer,
22					   yaffs_ext_tags *tags)
23{
24	int result;
25	yaffs_ext_tags localTags;
26
27	int realignedChunkInNAND = nand_chunk - dev->chunk_offset;
28
29	dev->n_page_reads++;
30
31	/* If there are no tags provided, use local tags to get prioritised gc working */
32	if (!tags)
33		tags = &localTags;
34
35	if (dev->param.read_chunk_tags_fn)
36		result = dev->param.read_chunk_tags_fn(dev, realignedChunkInNAND, buffer,
37						      tags);
38	else
39		result = yaffs_tags_compat_rd(dev,
40									realignedChunkInNAND,
41									buffer,
42									tags);
43	if (tags &&
44	   tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
45
46		yaffs_block_info_t *bi;
47		bi = yaffs_get_block_info(dev, nand_chunk/dev->param.chunks_per_block);
48		yaffs_handle_chunk_error(dev, bi);
49	}
50
51	return result;
52}
53
54int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev,
55						   int nand_chunk,
56						   const __u8 *buffer,
57						   yaffs_ext_tags *tags)
58{
59
60	dev->n_page_writes++;
61
62	nand_chunk -= dev->chunk_offset;
63
64
65	if (tags) {
66		tags->seq_number = dev->seq_number;
67		tags->chunk_used = 1;
68		if (!yaffs_validate_tags(tags)) {
69			T(YAFFS_TRACE_ERROR,
70			  (TSTR("Writing uninitialised tags" TENDSTR)));
71			YBUG();
72		}
73		T(YAFFS_TRACE_WRITE,
74		  (TSTR("Writing chunk %d tags %d %d" TENDSTR), nand_chunk,
75		   tags->obj_id, tags->chunk_id));
76	} else {
77		T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
78		YBUG();
79	}
80
81	if (dev->param.write_chunk_tags_fn)
82		return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
83						     tags);
84	else
85		return yaffs_tags_compat_wr(dev,
86								       nand_chunk,
87								       buffer,
88								       tags);
89}
90
91int yaffs_mark_bad(yaffs_dev_t *dev, int block_no)
92{
93	block_no -= dev->block_offset;
94
95
96	if (dev->param.bad_block_fn)
97		return dev->param.bad_block_fn(dev, block_no);
98	else
99		return yaffs_tags_compat_mark_bad(dev, block_no);
100}
101
102int yaffs_query_init_block_state(yaffs_dev_t *dev,
103						 int block_no,
104						 yaffs_block_state_t *state,
105						 __u32 *seq_number)
106{
107	block_no -= dev->block_offset;
108
109	if (dev->param.query_block_fn)
110		return dev->param.query_block_fn(dev, block_no, state, seq_number);
111	else
112		return yaffs_tags_compat_query_block(dev, block_no,
113							     state,
114							     seq_number);
115}
116
117
118int yaffs_erase_block(struct yaffs_dev_s *dev,
119				  int flash_block)
120{
121	int result;
122
123	flash_block -= dev->block_offset;
124
125	dev->n_erasures++;
126
127	result = dev->param.erase_fn(dev, flash_block);
128
129	return result;
130}
131
132int yaffs_init_nand(struct yaffs_dev_s *dev)
133{
134	if(dev->param.initialise_flash_fn)
135		return dev->param.initialise_flash_fn(dev);
136	return YAFFS_OK;
137}
138
139
140
141