1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2007 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.
*/
/* mtd interface for YAFFS2 */
const char *yaffs_mtdif2_c_version =
"$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
#include "yportenv.h"
#include "yaffs_mtdif2.h"
#include "linux/mtd/mtd.h"
#include "linux/types.h"
#include "linux/time.h"
#include "yaffs_packedtags2.h"
int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
const __u8 * data,
const yaffs_ExtendedTags * tags)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
struct mtd_oob_ops ops;
#else
size_t dummy;
#endif
int retval = 0;
loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
yaffs_PackedTags2 pt;
T(YAFFS_TRACE_MTD,
(TSTR
("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
TENDSTR), chunkInNAND, data, tags));
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
if (tags)
yaffs_PackTags2(&pt, tags);
else
BUG(); /* both tags and data should always be present */
if (data) {
ops.mode = MTD_OOB_AUTO;
ops.ooblen = sizeof(pt);
ops.len = dev->nDataBytesPerChunk;
ops.ooboffs = 0;
ops.datbuf = (__u8 *)data;
ops.oobbuf = (void *)&pt;
retval = mtd->write_oob(mtd, addr, &ops);
} else
BUG(); /* both tags and data should always be present */
#else
if (tags) {
yaffs_PackTags2(&pt, tags);
}
if (data && tags) {
if (dev->useNANDECC)
retval =
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
&dummy, data, (__u8 *) & pt, NULL);
else
retval =
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
&dummy, data, (__u8 *) & pt, NULL);
} else {
if (data)
retval =
mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
data);
if (tags)
retval =
mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
(__u8 *) & pt);
}
#endif
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
__u8 * data, yaffs_ExtendedTags * tags)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
struct mtd_oob_ops ops;
#endif
size_t dummy;
int retval = 0;
loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
yaffs_PackedTags2 pt;
T(YAFFS_TRACE_MTD,
(TSTR
("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
TENDSTR), chunkInNAND, data, tags));
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
if (data && !tags)
retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
&dummy, data);
else if (tags) {
ops.mode = MTD_OOB_AUTO;
ops.ooblen = sizeof(pt);
ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
ops.ooboffs = 0;
ops.datbuf = data;
ops.oobbuf = dev->spareBuffer;
retval = mtd->read_oob(mtd, addr, &ops);
}
#else
if (data && tags) {
if (dev->useNANDECC) {
retval =
mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
&dummy, data, dev->spareBuffer,
NULL);
} else {
retval =
mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
&dummy, data, dev->spareBuffer,
NULL);
}
} else {
if (data)
retval =
mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
data);
if (tags)
retval =
mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
dev->spareBuffer);
}
#endif
memcpy(&pt, dev->spareBuffer, sizeof(pt));
if (tags)
yaffs_UnpackTags2(tags, &pt);
if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
int retval;
T(YAFFS_TRACE_MTD,
(TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
retval =
mtd->block_markbad(mtd,
blockNo * dev->nChunksPerBlock *
dev->nDataBytesPerChunk);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
yaffs_BlockState * state, int *sequenceNumber)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
int retval;
T(YAFFS_TRACE_MTD,
(TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
retval =
mtd->block_isbad(mtd,
blockNo * dev->nChunksPerBlock *
dev->nDataBytesPerChunk);
if (retval) {
T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
*state = YAFFS_BLOCK_STATE_DEAD;
*sequenceNumber = 0;
} else {
yaffs_ExtendedTags t;
nandmtd2_ReadChunkWithTagsFromNAND(dev,
blockNo *
dev->nChunksPerBlock, NULL,
&t);
if (t.chunkUsed) {
*sequenceNumber = t.sequenceNumber;
*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
} else {
*sequenceNumber = 0;
*state = YAFFS_BLOCK_STATE_EMPTY;
}
}
T(YAFFS_TRACE_MTD,
(TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
*state));
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
|
