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
|
/*
* Copyright © 2009 - Maxim Levitsky
* Common routines & support for xD format
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/mtd/rawnand.h>
#include <linux/module.h>
#include <linux/sizes.h>
#include "sm_common.h"
static int oob_sm_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section > 1)
return -ERANGE;
oobregion->length = 3;
oobregion->offset = ((section + 1) * 8) - 3;
return 0;
}
static int oob_sm_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
switch (section) {
case 0:
/* reserved */
oobregion->offset = 0;
oobregion->length = 4;
break;
case 1:
/* LBA1 */
oobregion->offset = 6;
oobregion->length = 2;
break;
case 2:
/* LBA2 */
oobregion->offset = 11;
oobregion->length = 2;
break;
default:
return -ERANGE;
}
return 0;
}
static const struct mtd_ooblayout_ops oob_sm_ops = {
.ecc = oob_sm_ooblayout_ecc,
.free = oob_sm_ooblayout_free,
};
/* NOTE: This layout is is not compatabable with SmartMedia, */
/* because the 256 byte devices have page depenent oob layout */
/* However it does preserve the bad block markers */
/* If you use smftl, it will bypass this and work correctly */
/* If you not, then you break SmartMedia compliance anyway */
static int oob_sm_small_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section)
return -ERANGE;
oobregion->length = 3;
oobregion->offset = 0;
return 0;
}
static int oob_sm_small_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
switch (section) {
case 0:
/* reserved */
oobregion->offset = 3;
oobregion->length = 2;
break;
case 1:
/* LBA1 */
oobregion->offset = 6;
oobregion->length = 2;
break;
default:
return -ERANGE;
}
return 0;
}
static const struct mtd_ooblayout_ops oob_sm_small_ops = {
.ecc = oob_sm_small_ooblayout_ecc,
.free = oob_sm_small_ooblayout_free,
};
static int sm_block_markbad(struct nand_chip *chip, loff_t ofs)
{
struct mtd_info *mtd = nand_to_mtd(chip);
struct mtd_oob_ops ops;
struct sm_oob oob;
int ret;
memset(&oob, -1, SM_OOB_SIZE);
oob.block_status = 0x0F;
/* As long as this function is called on erase block boundaries
it will work correctly for 256 byte nand */
ops.mode = MTD_OPS_PLACE_OOB;
ops.ooboffs = 0;
ops.ooblen = mtd->oobsize;
ops.oobbuf = (void *)&oob;
ops.datbuf = NULL;
ret = mtd_write_oob(mtd, ofs, &ops);
if (ret < 0 || ops.oobretlen != SM_OOB_SIZE) {
pr_notice("sm_common: can't mark sector at %i as bad\n",
(int)ofs);
return -EIO;
}
return 0;
}
static struct nand_flash_dev nand_smartmedia_flash_ids[] = {
LEGACY_ID_NAND("SmartMedia 2MiB 3,3V ROM", 0x5d, 2, SZ_8K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 4MiB 3,3V", 0xe3, 4, SZ_8K, 0),
LEGACY_ID_NAND("SmartMedia 4MiB 3,3/5V", 0xe5, 4, SZ_8K, 0),
LEGACY_ID_NAND("SmartMedia 4MiB 5V", 0x6b, 4, SZ_8K, 0),
LEGACY_ID_NAND("SmartMedia 4MiB 3,3V ROM", 0xd5, 4, SZ_8K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 8MiB 3,3V", 0xe6, 8, SZ_8K, 0),
LEGACY_ID_NAND("SmartMedia 8MiB 3,3V ROM", 0xd6, 8, SZ_8K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 16MiB 3,3V", 0x73, 16, SZ_16K, 0),
LEGACY_ID_NAND("SmartMedia 16MiB 3,3V ROM", 0x57, 16, SZ_16K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 32MiB 3,3V", 0x75, 32, SZ_16K, 0),
LEGACY_ID_NAND("SmartMedia 32MiB 3,3V ROM", 0x58, 32, SZ_16K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 64MiB 3,3V", 0x76, 64, SZ_16K, 0),
LEGACY_ID_NAND("SmartMedia 64MiB 3,3V ROM", 0xd9, 64, SZ_16K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 128MiB 3,3V", 0x79, 128, SZ_16K, 0),
LEGACY_ID_NAND("SmartMedia 128MiB 3,3V ROM", 0xda, 128, SZ_16K, NAND_ROM),
LEGACY_ID_NAND("SmartMedia 256MiB 3, 3V", 0x71, 256, SZ_16K, 0),
LEGACY_ID_NAND("SmartMedia 256MiB 3,3V ROM", 0x5b, 256, SZ_16K, NAND_ROM),
{NULL}
};
static struct nand_flash_dev nand_xd_flash_ids[] = {
LEGACY_ID_NAND("xD 16MiB 3,3V", 0x73, 16, SZ_16K, 0),
LEGACY_ID_NAND("xD 32MiB 3,3V", 0x75, 32, SZ_16K, 0),
LEGACY_ID_NAND("xD 64MiB 3,3V", 0x76, 64, SZ_16K, 0),
LEGACY_ID_NAND("xD 128MiB 3,3V", 0x79, 128, SZ_16K, 0),
LEGACY_ID_NAND("xD 256MiB 3,3V", 0x71, 256, SZ_16K, NAND_BROKEN_XD),
LEGACY_ID_NAND("xD 512MiB 3,3V", 0xdc, 512, SZ_16K, NAND_BROKEN_XD),
LEGACY_ID_NAND("xD 1GiB 3,3V", 0xd3, 1024, SZ_16K, NAND_BROKEN_XD),
LEGACY_ID_NAND("xD 2GiB 3,3V", 0xd5, 2048, SZ_16K, NAND_BROKEN_XD),
{NULL}
};
static int sm_attach_chip(struct nand_chip *chip)
{
struct mtd_info *mtd = nand_to_mtd(chip);
/* Bad block marker position */
chip->badblockpos = 0x05;
chip->badblockbits = 7;
chip->legacy.block_markbad = sm_block_markbad;
/* ECC layout */
if (mtd->writesize == SM_SECTOR_SIZE)
mtd_set_ooblayout(mtd, &oob_sm_ops);
else if (mtd->writesize == SM_SMALL_PAGE)
mtd_set_ooblayout(mtd, &oob_sm_small_ops);
else
return -ENODEV;
return 0;
}
static const struct nand_controller_ops sm_controller_ops = {
.attach_chip = sm_attach_chip,
};
int sm_register_device(struct mtd_info *mtd, int smartmedia)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct nand_flash_dev *flash_ids;
int ret;
chip->options |= NAND_SKIP_BBTSCAN;
/* Scan for card properties */
chip->dummy_controller.ops = &sm_controller_ops;
flash_ids = smartmedia ? nand_smartmedia_flash_ids : nand_xd_flash_ids;
ret = nand_scan_with_ids(chip, 1, flash_ids);
if (ret)
return ret;
ret = mtd_device_register(mtd, NULL, 0);
if (ret)
nand_cleanup(chip);
return ret;
}
EXPORT_SYMBOL_GPL(sm_register_device);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>");
MODULE_DESCRIPTION("Common SmartMedia/xD functions");
|
