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
|
/*
* 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.
*/
/* XXX U-BOOT XXX */
#include <common.h>
#include "yportenv.h"
#include "yaffs_mtdif.h"
#include <linux/mtd/mtd.h>
#include <linux/types.h>
#include <linux/time.h>
#include <linux/mtd/rawnand.h>
static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob)
{
oob[0] = spare->tb0;
oob[1] = spare->tb1;
oob[2] = spare->tb2;
oob[3] = spare->tb3;
oob[4] = spare->tb4;
oob[5] = spare->tb5 & 0x3f;
oob[5] |= spare->block_status == 'Y' ? 0 : 0x80;
oob[5] |= spare->page_status == 0 ? 0 : 0x40;
oob[6] = spare->tb6;
oob[7] = spare->tb7;
}
static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob)
{
struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare;
spare->tb0 = oob[0];
spare->tb1 = oob[1];
spare->tb2 = oob[2];
spare->tb3 = oob[3];
spare->tb4 = oob[4];
spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
spare->block_status = oob[5] & 0x80 ? 0xff : 'Y';
spare->page_status = oob[5] & 0x40 ? 0xff : 0;
spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
spare->tb6 = oob[6];
spare->tb7 = oob[7];
spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
}
int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND,
const u8 *data, const struct yaffs_spare *spare)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
struct mtd_oob_ops ops;
size_t dummy;
int retval = 0;
loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
u8 spareAsBytes[8]; /* OOB */
if (data && !spare)
retval = mtd_write(mtd, addr, dev->data_bytes_per_chunk,
&dummy, data);
else if (spare) {
if (dev->param.use_nand_ecc) {
translate_spare2oob(spare, spareAsBytes);
ops.mode = MTD_OPS_AUTO_OOB;
ops.ooblen = 8; /* temp hack */
} else {
ops.mode = MTD_OPS_RAW;
ops.ooblen = YAFFS_BYTES_PER_SPARE;
}
ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
ops.datbuf = (u8 *)data;
ops.ooboffs = 0;
ops.oobbuf = spareAsBytes;
retval = mtd_write_oob(mtd, addr, &ops);
}
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data,
struct yaffs_spare *spare)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
struct mtd_oob_ops ops;
size_t dummy;
int retval = 0;
loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
u8 spareAsBytes[8]; /* OOB */
if (data && !spare)
retval = mtd_read(mtd, addr, dev->data_bytes_per_chunk,
&dummy, data);
else if (spare) {
if (dev->param.use_nand_ecc) {
ops.mode = MTD_OPS_AUTO_OOB;
ops.ooblen = 8; /* temp hack */
} else {
ops.mode = MTD_OPS_RAW;
ops.ooblen = YAFFS_BYTES_PER_SPARE;
}
ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
ops.datbuf = data;
ops.ooboffs = 0;
ops.oobbuf = spareAsBytes;
retval = mtd_read_oob(mtd, addr, &ops);
if (dev->param.use_nand_ecc)
translate_oob2spare(spare, spareAsBytes);
}
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
__u32 addr =
((loff_t) blockNumber) * dev->data_bytes_per_chunk
* dev->param.chunks_per_block;
struct erase_info ei;
int retval = 0;
ei.mtd = mtd;
ei.addr = addr;
ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block;
ei.time = 1000;
ei.retries = 2;
ei.callback = NULL;
ei.priv = (u_long) dev;
/* Todo finish off the ei if required */
retval = mtd_erase(mtd, &ei);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd_InitialiseNAND(struct yaffs_dev *dev)
{
return YAFFS_OK;
}
|
