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
|
/*
* (C) Copyright 2008 Semihalf
*
* Written by: Piotr Ziecik <kosmo@semihalf.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include <common.h>
#include <flash.h>
#include <asm/errno.h>
#include <linux/mtd/mtd.h>
extern flash_info_t flash_info[];
static struct mtd_info cfi_mtd_info[CONFIG_SYS_MAX_FLASH_BANKS];
static char cfi_mtd_names[CONFIG_SYS_MAX_FLASH_BANKS][16];
static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
{
flash_info_t *fi = mtd->priv;
size_t a_start = fi->start[0] + instr->addr;
size_t a_end = a_start + instr->len;
int s_first = -1;
int s_last = -1;
int error, sect;
for (sect = 0; sect < fi->sector_count - 1; sect++) {
if (a_start == fi->start[sect])
s_first = sect;
if (a_end == fi->start[sect + 1]) {
s_last = sect;
break;
}
}
if (s_first >= 0 && s_first <= s_last) {
instr->state = MTD_ERASING;
flash_set_verbose(0);
error = flash_erase(fi, s_first, s_last);
flash_set_verbose(1);
if (error) {
instr->state = MTD_ERASE_FAILED;
return -EIO;
}
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
return 0;
}
return -EINVAL;
}
static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
flash_info_t *fi = mtd->priv;
u_char *f = (u_char*)(fi->start[0]) + from;
memcpy(buf, f, len);
*retlen = len;
return 0;
}
static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
flash_info_t *fi = mtd->priv;
u_long t = fi->start[0] + to;
int error;
flash_set_verbose(0);
error = write_buff(fi, (u_char*)buf, t, len);
flash_set_verbose(1);
if (!error) {
*retlen = len;
return 0;
}
return -EIO;
}
static void cfi_mtd_sync(struct mtd_info *mtd)
{
/*
* This function should wait until all pending operations
* finish. However this driver is fully synchronous, so
* this function returns immediately
*/
}
static int cfi_mtd_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
{
flash_info_t *fi = mtd->priv;
flash_set_verbose(0);
flash_protect(FLAG_PROTECT_SET, fi->start[0] + ofs,
fi->start[0] + ofs + len - 1, fi);
flash_set_verbose(1);
return 0;
}
static int cfi_mtd_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
{
flash_info_t *fi = mtd->priv;
flash_set_verbose(0);
flash_protect(FLAG_PROTECT_CLEAR, fi->start[0] + ofs,
fi->start[0] + ofs + len - 1, fi);
flash_set_verbose(1);
return 0;
}
static int cfi_mtd_set_erasesize(struct mtd_info *mtd, flash_info_t *fi)
{
int sect_size = 0;
int sect;
/*
* Select the largest sector size as erasesize (e.g. for UBI)
*/
for (sect = 0; sect < fi->sector_count; sect++) {
if (flash_sector_size(fi, sect) > sect_size)
sect_size = flash_sector_size(fi, sect);
}
mtd->erasesize = sect_size;
return 0;
}
int cfi_mtd_init(void)
{
struct mtd_info *mtd;
flash_info_t *fi;
int error, i;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
fi = &flash_info[i];
mtd = &cfi_mtd_info[i];
memset(mtd, 0, sizeof(struct mtd_info));
error = cfi_mtd_set_erasesize(mtd, fi);
if (error)
continue;
sprintf(cfi_mtd_names[i], "nor%d", i);
mtd->name = cfi_mtd_names[i];
mtd->type = MTD_NORFLASH;
mtd->flags = MTD_CAP_NORFLASH;
mtd->size = fi->size;
mtd->writesize = 1;
mtd->erase = cfi_mtd_erase;
mtd->read = cfi_mtd_read;
mtd->write = cfi_mtd_write;
mtd->sync = cfi_mtd_sync;
mtd->lock = cfi_mtd_lock;
mtd->unlock = cfi_mtd_unlock;
mtd->priv = fi;
if (add_mtd_device(mtd))
return -ENOMEM;
}
return 0;
}
|
