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Viewing changes to roms/u-boot/common/env_flash.c

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/u-boot/common/env_flash.c
 
1
/*
 
2
 * (C) Copyright 2000-2010
 
3
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
4
 *
 
5
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 
6
 * Andreas Heppel <aheppel@sysgo.de>
 
7
 
 
8
 * SPDX-License-Identifier:     GPL-2.0+
 
9
 */
 
10
 
 
11
/* #define DEBUG */
 
12
 
 
13
#include <common.h>
 
14
#include <command.h>
 
15
#include <environment.h>
 
16
#include <linux/stddef.h>
 
17
#include <malloc.h>
 
18
#include <search.h>
 
19
#include <errno.h>
 
20
 
 
21
DECLARE_GLOBAL_DATA_PTR;
 
22
 
 
23
#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
 
24
#define CMD_SAVEENV
 
25
#elif defined(CONFIG_ENV_ADDR_REDUND)
 
26
#error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
 
27
#endif
 
28
 
 
29
#if defined(CONFIG_ENV_SIZE_REDUND) &&  \
 
30
        (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
 
31
#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
 
32
#endif
 
33
 
 
34
char *env_name_spec = "Flash";
 
35
 
 
36
#ifdef ENV_IS_EMBEDDED
 
37
env_t *env_ptr = &environment;
 
38
 
 
39
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
 
40
 
 
41
#else /* ! ENV_IS_EMBEDDED */
 
42
 
 
43
env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
 
44
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
 
45
#endif /* ENV_IS_EMBEDDED */
 
46
 
 
47
#if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
 
48
/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
 
49
static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
 
50
#endif
 
51
 
 
52
#ifdef CONFIG_ENV_ADDR_REDUND
 
53
static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
 
54
 
 
55
/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
 
56
static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
 
57
#endif /* CONFIG_ENV_ADDR_REDUND */
 
58
 
 
59
 
 
60
#ifdef CONFIG_ENV_ADDR_REDUND
 
61
int env_init(void)
 
62
{
 
63
        int crc1_ok = 0, crc2_ok = 0;
 
64
 
 
65
        uchar flag1 = flash_addr->flags;
 
66
        uchar flag2 = flash_addr_new->flags;
 
67
 
 
68
        ulong addr_default = (ulong)&default_environment[0];
 
69
        ulong addr1 = (ulong)&(flash_addr->data);
 
70
        ulong addr2 = (ulong)&(flash_addr_new->data);
 
71
 
 
72
        crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
 
73
        crc2_ok =
 
74
                crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
 
75
 
 
76
        if (crc1_ok && !crc2_ok) {
 
77
                gd->env_addr    = addr1;
 
78
                gd->env_valid   = 1;
 
79
        } else if (!crc1_ok && crc2_ok) {
 
80
                gd->env_addr    = addr2;
 
81
                gd->env_valid   = 1;
 
82
        } else if (!crc1_ok && !crc2_ok) {
 
83
                gd->env_addr    = addr_default;
 
84
                gd->env_valid   = 0;
 
85
        } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
 
86
                gd->env_addr    = addr1;
 
87
                gd->env_valid   = 1;
 
88
        } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
 
89
                gd->env_addr    = addr2;
 
90
                gd->env_valid   = 1;
 
91
        } else if (flag1 == flag2) {
 
92
                gd->env_addr    = addr1;
 
93
                gd->env_valid   = 2;
 
94
        } else if (flag1 == 0xFF) {
 
95
                gd->env_addr    = addr1;
 
96
                gd->env_valid   = 2;
 
97
        } else if (flag2 == 0xFF) {
 
98
                gd->env_addr    = addr2;
 
99
                gd->env_valid   = 2;
 
100
        }
 
101
 
 
102
        return 0;
 
103
}
 
104
 
 
105
#ifdef CMD_SAVEENV
 
106
int saveenv(void)
 
107
{
 
108
        env_t   env_new;
 
109
        char    *saved_data = NULL;
 
110
        char    flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
 
111
        int     rc = 1;
 
112
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
 
113
        ulong   up_data = 0;
 
114
#endif
 
115
 
 
116
        debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
 
117
 
 
118
        if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
 
119
                goto done;
 
120
 
 
121
        debug("Protect off %08lX ... %08lX\n",
 
122
                (ulong)flash_addr_new, end_addr_new);
 
123
 
 
124
        if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
 
125
                goto done;
 
126
 
 
127
        rc = env_export(&env_new);
 
128
        if (rc)
 
129
                return rc;
 
130
        env_new.flags   = new_flag;
 
131
 
 
132
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
 
133
        up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
 
134
        debug("Data to save 0x%lX\n", up_data);
 
135
        if (up_data) {
 
136
                saved_data = malloc(up_data);
 
137
                if (saved_data == NULL) {
 
138
                        printf("Unable to save the rest of sector (%ld)\n",
 
139
                                up_data);
 
140
                        goto done;
 
141
                }
 
142
                memcpy(saved_data,
 
143
                        (void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
 
144
                        up_data);
 
145
                debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
 
146
                        (long)flash_addr_new + CONFIG_ENV_SIZE,
 
147
                        up_data, saved_data);
 
148
        }
 
149
#endif
 
150
        puts("Erasing Flash...");
 
151
        debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
 
152
 
 
153
        if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
 
154
                goto done;
 
155
 
 
156
        puts("Writing to Flash... ");
 
157
        debug(" %08lX ... %08lX ...",
 
158
                (ulong)&(flash_addr_new->data),
 
159
                sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
 
160
        rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
 
161
                         sizeof(env_new));
 
162
        if (rc)
 
163
                goto perror;
 
164
 
 
165
        rc = flash_write(&flag, (ulong)&(flash_addr->flags),
 
166
                         sizeof(flash_addr->flags));
 
167
        if (rc)
 
168
                goto perror;
 
169
 
 
170
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
 
171
        if (up_data) { /* restore the rest of sector */
 
172
                debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
 
173
                        (long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
 
174
                if (flash_write(saved_data,
 
175
                                (long)flash_addr_new + CONFIG_ENV_SIZE,
 
176
                                up_data))
 
177
                        goto perror;
 
178
        }
 
179
#endif
 
180
        puts("done\n");
 
181
 
 
182
        {
 
183
                env_t *etmp = flash_addr;
 
184
                ulong ltmp = end_addr;
 
185
 
 
186
                flash_addr = flash_addr_new;
 
187
                flash_addr_new = etmp;
 
188
 
 
189
                end_addr = end_addr_new;
 
190
                end_addr_new = ltmp;
 
191
        }
 
192
 
 
193
        rc = 0;
 
194
        goto done;
 
195
perror:
 
196
        flash_perror(rc);
 
197
done:
 
198
        if (saved_data)
 
199
                free(saved_data);
 
200
        /* try to re-protect */
 
201
        flash_sect_protect(1, (ulong)flash_addr, end_addr);
 
202
        flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
 
203
 
 
204
        return rc;
 
205
}
 
206
#endif /* CMD_SAVEENV */
 
207
 
 
208
#else /* ! CONFIG_ENV_ADDR_REDUND */
 
209
 
 
210
int env_init(void)
 
211
{
 
212
        if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
 
213
                gd->env_addr    = (ulong)&(env_ptr->data);
 
214
                gd->env_valid   = 1;
 
215
                return 0;
 
216
        }
 
217
 
 
218
        gd->env_addr    = (ulong)&default_environment[0];
 
219
        gd->env_valid   = 0;
 
220
        return 0;
 
221
}
 
222
 
 
223
#ifdef CMD_SAVEENV
 
224
int saveenv(void)
 
225
{
 
226
        env_t   env_new;
 
227
        int     rc = 1;
 
228
        char    *saved_data = NULL;
 
229
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
 
230
        ulong   up_data = 0;
 
231
 
 
232
        up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
 
233
        debug("Data to save 0x%lx\n", up_data);
 
234
        if (up_data) {
 
235
                saved_data = malloc(up_data);
 
236
                if (saved_data == NULL) {
 
237
                        printf("Unable to save the rest of sector (%ld)\n",
 
238
                                up_data);
 
239
                        goto done;
 
240
                }
 
241
                memcpy(saved_data,
 
242
                        (void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
 
243
                debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
 
244
                        (ulong)flash_addr + CONFIG_ENV_SIZE,
 
245
                        up_data,
 
246
                        (ulong)saved_data);
 
247
        }
 
248
#endif  /* CONFIG_ENV_SECT_SIZE */
 
249
 
 
250
        debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
 
251
 
 
252
        if (flash_sect_protect(0, (long)flash_addr, end_addr))
 
253
                goto done;
 
254
 
 
255
        rc = env_export(&env_new);
 
256
        if (rc)
 
257
                goto done;
 
258
 
 
259
        puts("Erasing Flash...");
 
260
        if (flash_sect_erase((long)flash_addr, end_addr))
 
261
                goto done;
 
262
 
 
263
        puts("Writing to Flash... ");
 
264
        rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
 
265
        if (rc != 0)
 
266
                goto perror;
 
267
 
 
268
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
 
269
        if (up_data) {  /* restore the rest of sector */
 
270
                debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
 
271
                        (ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
 
272
                if (flash_write(saved_data,
 
273
                                (long)flash_addr + CONFIG_ENV_SIZE,
 
274
                                up_data))
 
275
                        goto perror;
 
276
        }
 
277
#endif
 
278
        puts("done\n");
 
279
        rc = 0;
 
280
        goto done;
 
281
perror:
 
282
        flash_perror(rc);
 
283
done:
 
284
        if (saved_data)
 
285
                free(saved_data);
 
286
        /* try to re-protect */
 
287
        flash_sect_protect(1, (long)flash_addr, end_addr);
 
288
        return rc;
 
289
}
 
290
#endif /* CMD_SAVEENV */
 
291
 
 
292
#endif /* CONFIG_ENV_ADDR_REDUND */
 
293
 
 
294
void env_relocate_spec(void)
 
295
{
 
296
#ifdef CONFIG_ENV_ADDR_REDUND
 
297
        if (gd->env_addr != (ulong)&(flash_addr->data)) {
 
298
                env_t *etmp = flash_addr;
 
299
                ulong ltmp = end_addr;
 
300
 
 
301
                flash_addr = flash_addr_new;
 
302
                flash_addr_new = etmp;
 
303
 
 
304
                end_addr = end_addr_new;
 
305
                end_addr_new = ltmp;
 
306
        }
 
307
 
 
308
        if (flash_addr_new->flags != OBSOLETE_FLAG &&
 
309
            crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
 
310
                char flag = OBSOLETE_FLAG;
 
311
 
 
312
                gd->env_valid = 2;
 
313
                flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
 
314
                flash_write(&flag,
 
315
                            (ulong)&(flash_addr_new->flags),
 
316
                            sizeof(flash_addr_new->flags));
 
317
                flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
 
318
        }
 
319
 
 
320
        if (flash_addr->flags != ACTIVE_FLAG &&
 
321
            (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
 
322
                char flag = ACTIVE_FLAG;
 
323
 
 
324
                gd->env_valid = 2;
 
325
                flash_sect_protect(0, (ulong)flash_addr, end_addr);
 
326
                flash_write(&flag,
 
327
                            (ulong)&(flash_addr->flags),
 
328
                            sizeof(flash_addr->flags));
 
329
                flash_sect_protect(1, (ulong)flash_addr, end_addr);
 
330
        }
 
331
 
 
332
        if (gd->env_valid == 2)
 
333
                puts("*** Warning - some problems detected "
 
334
                     "reading environment; recovered successfully\n\n");
 
335
#endif /* CONFIG_ENV_ADDR_REDUND */
 
336
 
 
337
        env_import((char *)flash_addr, 1);
 
338
}