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
|
/*
* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
*
* 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
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <mmc.h>
#include <search.h>
#include <errno.h>
char *env_name_spec = "MMC";
#ifdef ENV_IS_EMBEDDED
env_t *env_ptr = &environment;
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr;
#endif /* ENV_IS_EMBEDDED */
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_ENV_OFFSET)
#define CONFIG_ENV_OFFSET 0
#endif
__weak int mmc_get_env_addr(struct mmc *mmc, u32 *env_addr)
{
*env_addr = CONFIG_ENV_OFFSET;
return 0;
}
int env_init(void)
{
/* use default */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
return 0;
}
static int init_mmc_for_env(struct mmc *mmc)
{
if (!mmc) {
puts("No MMC card found\n");
return -1;
}
if (mmc_init(mmc)) {
puts("MMC init failed\n");
return -1;
}
#ifdef CONFIG_SYS_MMC_ENV_PART
if (CONFIG_SYS_MMC_ENV_PART != mmc->part_num) {
if (mmc_switch_part(CONFIG_SYS_MMC_ENV_DEV,
CONFIG_SYS_MMC_ENV_PART)) {
puts("MMC partition switch failed\n");
return -1;
}
}
#endif
return 0;
}
static void fini_mmc_for_env(struct mmc *mmc)
{
#ifdef CONFIG_SYS_MMC_ENV_PART
if (CONFIG_SYS_MMC_ENV_PART != mmc->part_num)
mmc_switch_part(CONFIG_SYS_MMC_ENV_DEV,
mmc->part_num);
#endif
}
#ifdef CONFIG_CMD_SAVEENV
static inline int write_env(struct mmc *mmc, unsigned long size,
unsigned long offset, const void *buffer)
{
uint blk_start, blk_cnt, n;
blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
n = mmc->block_dev.block_write(CONFIG_SYS_MMC_ENV_DEV, blk_start,
blk_cnt, (u_char *)buffer);
return (n == blk_cnt) ? 0 : -1;
}
int saveenv(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
ssize_t len;
char *res;
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
u32 offset;
int ret;
if (init_mmc_for_env(mmc))
return 1;
if (mmc_get_env_addr(mmc, &offset)) {
ret = 1;
goto fini;
}
res = (char *)&env_new->data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
ret = 1;
goto fini;
}
env_new->crc = crc32(0, &env_new->data[0], ENV_SIZE);
printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV);
if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
puts("failed\n");
ret = 1;
goto fini;
}
puts("done\n");
ret = 0;
fini:
fini_mmc_for_env(mmc);
return ret;
}
#endif /* CONFIG_CMD_SAVEENV */
static inline int read_env(struct mmc *mmc, unsigned long size,
unsigned long offset, const void *buffer)
{
uint blk_start, blk_cnt, n;
blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
n = mmc->block_dev.block_read(CONFIG_SYS_MMC_ENV_DEV, blk_start,
blk_cnt, (uchar *)buffer);
return (n == blk_cnt) ? 0 : -1;
}
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
u32 offset;
int ret;
if (init_mmc_for_env(mmc)) {
ret = 1;
goto err;
}
if (mmc_get_env_addr(mmc, &offset)) {
ret = 1;
goto fini;
}
if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
ret = 1;
goto fini;
}
env_import(buf, 1);
ret = 0;
fini:
fini_mmc_for_env(mmc);
err:
if (ret)
set_default_env(NULL);
#endif
}
|
