1 /*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2011 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
17 #include "yaffs_getblockinfo.h"
18 #include "yaffs_summary.h"
19
yaffs_rd_chunk_tags_nand(struct yaffs_dev * dev,int nand_chunk,u8 * buffer,struct yaffs_ext_tags * tags)20 int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
21 u8 *buffer, struct yaffs_ext_tags *tags)
22 {
23 int result;
24 struct yaffs_ext_tags local_tags;
25 int flash_chunk = nand_chunk - dev->chunk_offset;
26
27 dev->n_page_reads++;
28
29 /* If there are no tags provided use local tags. */
30 if (!tags)
31 tags = &local_tags;
32
33 if (dev->param.read_chunk_tags_fn)
34 result =
35 dev->param.read_chunk_tags_fn(dev, flash_chunk, buffer,
36 tags);
37 else
38 result = yaffs_tags_compat_rd(dev,
39 flash_chunk, buffer, tags);
40 if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
41
42 struct yaffs_block_info *bi;
43 bi = yaffs_get_block_info(dev,
44 nand_chunk /
45 dev->param.chunks_per_block);
46 yaffs_handle_chunk_error(dev, bi);
47 }
48 return result;
49 }
50
yaffs_wr_chunk_tags_nand(struct yaffs_dev * dev,int nand_chunk,const u8 * buffer,struct yaffs_ext_tags * tags)51 int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
52 int nand_chunk,
53 const u8 *buffer, struct yaffs_ext_tags *tags)
54 {
55 int result;
56 int flash_chunk = nand_chunk - dev->chunk_offset;
57
58 dev->n_page_writes++;
59
60 if (tags) {
61 tags->seq_number = dev->seq_number;
62 tags->chunk_used = 1;
63 yaffs_trace(YAFFS_TRACE_WRITE,
64 "Writing chunk %d tags %d %d",
65 nand_chunk, tags->obj_id, tags->chunk_id);
66 } else {
67 yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
68 BUG();
69 return YAFFS_FAIL;
70 }
71
72 if (dev->param.write_chunk_tags_fn)
73 result = dev->param.write_chunk_tags_fn(dev, flash_chunk,
74 buffer, tags);
75 else
76 result = yaffs_tags_compat_wr(dev, flash_chunk, buffer, tags);
77
78 yaffs_summary_add(dev, tags, nand_chunk);
79
80 return result;
81 }
82
yaffs_mark_bad(struct yaffs_dev * dev,int block_no)83 int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
84 {
85 block_no -= dev->block_offset;
86 if (dev->param.bad_block_fn)
87 return dev->param.bad_block_fn(dev, block_no);
88
89 return yaffs_tags_compat_mark_bad(dev, block_no);
90 }
91
yaffs_query_init_block_state(struct yaffs_dev * dev,int block_no,enum yaffs_block_state * state,u32 * seq_number)92 int yaffs_query_init_block_state(struct yaffs_dev *dev,
93 int block_no,
94 enum yaffs_block_state *state,
95 u32 *seq_number)
96 {
97 block_no -= dev->block_offset;
98 if (dev->param.query_block_fn)
99 return dev->param.query_block_fn(dev, block_no, state,
100 seq_number);
101
102 return yaffs_tags_compat_query_block(dev, block_no, state, seq_number);
103 }
104
yaffs_erase_block(struct yaffs_dev * dev,int flash_block)105 int yaffs_erase_block(struct yaffs_dev *dev, int flash_block)
106 {
107 int result;
108
109 flash_block -= dev->block_offset;
110 dev->n_erasures++;
111 result = dev->param.erase_fn(dev, flash_block);
112 return result;
113 }
114
yaffs_init_nand(struct yaffs_dev * dev)115 int yaffs_init_nand(struct yaffs_dev *dev)
116 {
117 if (dev->param.initialise_flash_fn)
118 return dev->param.initialise_flash_fn(dev);
119 return YAFFS_OK;
120 }
121