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c609719b WD |
1 | /* |
2 | * (C) Copyright 2000-2002 | |
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 | * See file CREDITS for list of people who contributed to this | |
9 | * project. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2 of | |
14 | * the License, or (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
24 | * MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | /* #define DEBUG */ | |
28 | ||
29 | #include <common.h> | |
30 | ||
31 | #if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */ | |
32 | ||
33 | #include <command.h> | |
34 | #include <environment.h> | |
35 | #include <cmd_nvedit.h> | |
36 | #include <linux/stddef.h> | |
47cd00fa | 37 | #include <malloc.h> |
c609719b WD |
38 | |
39 | #if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH)) | |
40 | #define CMD_SAVEENV | |
41 | #elif defined(CFG_ENV_ADDR_REDUND) | |
42 | #error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH | |
43 | #endif | |
44 | ||
c609719b WD |
45 | #if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE) |
46 | #error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE | |
47 | #endif | |
48 | ||
49 | #ifdef CONFIG_INFERNO | |
50 | # ifdef CFG_ENV_ADDR_REDUND | |
51 | #error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO | |
52 | # endif | |
53 | #endif | |
54 | ||
55 | char * env_name_spec = "Flash"; | |
56 | ||
57 | #ifdef ENV_IS_EMBEDDED | |
58 | ||
59 | extern uchar environment[]; | |
60 | env_t *env_ptr = (env_t *)(&environment[0]); | |
61 | ||
62 | #ifdef CMD_SAVEENV | |
63 | /* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/ | |
64 | static env_t *flash_addr = (env_t *)CFG_ENV_ADDR; | |
65 | #endif | |
66 | ||
67 | #else /* ! ENV_IS_EMBEDDED */ | |
68 | ||
69 | env_t *env_ptr = (env_t *)CFG_ENV_ADDR; | |
70 | #ifdef CMD_SAVEENV | |
71 | static env_t *flash_addr = (env_t *)CFG_ENV_ADDR; | |
72 | #endif | |
73 | ||
74 | #endif /* ENV_IS_EMBEDDED */ | |
75 | ||
76 | #ifdef CFG_ENV_ADDR_REDUND | |
77 | static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND; | |
78 | ||
47cd00fa WD |
79 | /* CFG_ENV_ADDR is supposed to be on sector boundary */ |
80 | static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1; | |
81 | static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1; | |
c609719b WD |
82 | |
83 | static uchar active_flag = 1; | |
84 | static uchar obsolete_flag = 0; | |
85 | #endif | |
86 | ||
87 | extern uchar default_environment[]; | |
88 | extern int default_environment_size; | |
89 | ||
90 | ||
91 | uchar env_get_char_spec (int index) | |
92 | { | |
93 | DECLARE_GLOBAL_DATA_PTR; | |
94 | ||
95 | return ( *((uchar *)(gd->env_addr + index)) ); | |
96 | } | |
97 | ||
98 | #ifdef CFG_ENV_ADDR_REDUND | |
99 | ||
100 | int env_init(void) | |
101 | { | |
102 | DECLARE_GLOBAL_DATA_PTR; | |
103 | ||
104 | int crc1_ok = | |
105 | (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc); | |
106 | int crc2_ok = | |
107 | (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc); | |
108 | ||
109 | uchar flag1 = flash_addr->flags; | |
110 | uchar flag2 = flash_addr_new->flags; | |
111 | ||
112 | ulong addr_default = (ulong)&default_environment[0]; | |
113 | ulong addr1 = (ulong)&(flash_addr->data); | |
114 | ulong addr2 = (ulong)&(flash_addr_new->data); | |
115 | ||
116 | if (crc1_ok && ! crc2_ok) | |
117 | { | |
118 | gd->env_addr = addr1; | |
119 | gd->env_valid = 1; | |
120 | } | |
121 | else if (! crc1_ok && crc2_ok) | |
122 | { | |
123 | gd->env_addr = addr2; | |
124 | gd->env_valid = 1; | |
125 | } | |
126 | else if (! crc1_ok && ! crc2_ok) | |
127 | { | |
128 | gd->env_addr = addr_default; | |
129 | gd->env_valid = 0; | |
130 | } | |
131 | else if (flag1 == active_flag && flag2 == obsolete_flag) | |
132 | { | |
133 | gd->env_addr = addr1; | |
134 | gd->env_valid = 1; | |
135 | } | |
136 | else if (flag1 == obsolete_flag && flag2 == active_flag) | |
137 | { | |
138 | gd->env_addr = addr2; | |
139 | gd->env_valid = 1; | |
140 | } | |
141 | else if (flag1 == flag2) | |
142 | { | |
143 | gd->env_addr = addr1; | |
144 | gd->env_valid = 2; | |
145 | } | |
146 | else if (flag1 == 0xFF) | |
147 | { | |
148 | gd->env_addr = addr1; | |
149 | gd->env_valid = 2; | |
150 | } | |
151 | else if (flag2 == 0xFF) | |
152 | { | |
153 | gd->env_addr = addr2; | |
154 | gd->env_valid = 2; | |
155 | } | |
156 | ||
157 | return (0); | |
158 | } | |
159 | ||
160 | #ifdef CMD_SAVEENV | |
161 | int saveenv(void) | |
162 | { | |
500545cc | 163 | char *saved_data = NULL; |
c609719b | 164 | int rc = 1; |
500545cc | 165 | #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE |
47cd00fa | 166 | ulong up_data = 0; |
500545cc | 167 | #endif |
c609719b WD |
168 | |
169 | debug ("Protect off %08lX ... %08lX\n", | |
170 | (ulong)flash_addr, end_addr); | |
171 | ||
172 | if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) { | |
173 | goto Done; | |
174 | } | |
175 | ||
176 | debug ("Protect off %08lX ... %08lX\n", | |
177 | (ulong)flash_addr_new, end_addr_new); | |
178 | ||
179 | if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) { | |
180 | goto Done; | |
181 | } | |
182 | ||
47cd00fa WD |
183 | #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE |
184 | up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE)); | |
185 | debug ("Data to save 0x%x\n", up_data); | |
186 | if (up_data) { | |
187 | if ((saved_data = malloc(up_data)) == NULL) { | |
188 | printf("Unable to save the rest of sector (%ld)\n", | |
189 | up_data); | |
190 | goto Done; | |
191 | } | |
192 | memcpy(saved_data, | |
193 | (void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data); | |
194 | debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n", | |
195 | (long)flash_addr_new + CFG_ENV_SIZE, | |
196 | up_data, saved_data); | |
197 | } | |
198 | #endif | |
c609719b WD |
199 | puts ("Erasing Flash..."); |
200 | debug (" %08lX ... %08lX ...", | |
201 | (ulong)flash_addr_new, end_addr_new); | |
202 | ||
203 | if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) { | |
204 | goto Done; | |
205 | } | |
206 | ||
207 | puts ("Writing to Flash... "); | |
208 | debug (" %08lX ... %08lX ...", | |
209 | (ulong)&(flash_addr_new->data), | |
210 | sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data)); | |
211 | if (flash_write(env_ptr->data, | |
212 | (ulong)&(flash_addr_new->data), | |
213 | sizeof(env_ptr->data)) || | |
214 | ||
215 | flash_write((char *)&(env_ptr->crc), | |
216 | (ulong)&(flash_addr_new->crc), | |
217 | sizeof(env_ptr->crc)) || | |
218 | ||
219 | flash_write((char *)&obsolete_flag, | |
220 | (ulong)&(flash_addr->flags), | |
221 | sizeof(flash_addr->flags)) || | |
222 | ||
223 | flash_write((char *)&active_flag, | |
224 | (ulong)&(flash_addr_new->flags), | |
225 | sizeof(flash_addr_new->flags))) | |
226 | { | |
227 | flash_perror (rc); | |
228 | goto Done; | |
229 | } | |
230 | puts ("done\n"); | |
231 | ||
47cd00fa WD |
232 | #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE |
233 | if (up_data) { /* restore the rest of sector */ | |
234 | debug ("Restoring the rest of data to 0x%x len 0x%x\n", | |
235 | (long)flash_addr_new + CFG_ENV_SIZE, up_data); | |
236 | if (flash_write(saved_data, | |
237 | (long)flash_addr_new + CFG_ENV_SIZE, | |
238 | up_data)) { | |
239 | flash_perror(rc); | |
240 | goto Done; | |
241 | } | |
242 | } | |
243 | #endif | |
c609719b WD |
244 | { |
245 | env_t * etmp = flash_addr; | |
246 | ulong ltmp = end_addr; | |
247 | ||
248 | flash_addr = flash_addr_new; | |
249 | flash_addr_new = etmp; | |
250 | ||
251 | end_addr = end_addr_new; | |
252 | end_addr_new = ltmp; | |
253 | } | |
254 | ||
255 | rc = 0; | |
256 | Done: | |
257 | ||
47cd00fa WD |
258 | if (saved_data) |
259 | free (saved_data); | |
c609719b WD |
260 | /* try to re-protect */ |
261 | (void) flash_sect_protect (1, (ulong)flash_addr, end_addr); | |
262 | (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new); | |
263 | ||
264 | return rc; | |
265 | } | |
266 | #endif /* CMD_SAVEENV */ | |
267 | ||
268 | #else /* ! CFG_ENV_ADDR_REDUND */ | |
269 | ||
270 | int env_init(void) | |
271 | { | |
272 | DECLARE_GLOBAL_DATA_PTR; | |
273 | ||
274 | if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) { | |
275 | gd->env_addr = (ulong)&(env_ptr->data); | |
276 | gd->env_valid = 1; | |
277 | } else { | |
278 | gd->env_addr = (ulong)&default_environment[0]; | |
279 | gd->env_valid = 0; | |
280 | } | |
281 | ||
282 | return (0); | |
283 | } | |
284 | ||
285 | #ifdef CMD_SAVEENV | |
286 | ||
287 | int saveenv(void) | |
288 | { | |
289 | int len, rc; | |
290 | ulong end_addr; | |
291 | ulong flash_sect_addr; | |
292 | #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) | |
293 | ulong flash_offset; | |
294 | uchar env_buffer[CFG_ENV_SECT_SIZE]; | |
295 | #else | |
296 | uchar *env_buffer = (char *)env_ptr; | |
297 | #endif /* CFG_ENV_SECT_SIZE */ | |
298 | int rcode = 0; | |
299 | ||
300 | #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) | |
301 | ||
302 | flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1); | |
303 | flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1); | |
304 | ||
305 | debug ( "copy old content: " | |
306 | "sect_addr: %08lX env_addr: %08lX offset: %08lX\n", | |
307 | flash_sect_addr, (ulong)flash_addr, flash_offset); | |
308 | ||
309 | /* copy old contents to temporary buffer */ | |
310 | memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE); | |
311 | ||
312 | /* copy current environment to temporary buffer */ | |
313 | memcpy ((uchar *)((unsigned long)env_buffer + flash_offset), | |
314 | env_ptr, | |
315 | CFG_ENV_SIZE); | |
316 | ||
317 | len = CFG_ENV_SECT_SIZE; | |
318 | #else | |
319 | flash_sect_addr = (ulong)flash_addr; | |
320 | len = CFG_ENV_SIZE; | |
321 | #endif /* CFG_ENV_SECT_SIZE */ | |
322 | ||
323 | #ifndef CONFIG_INFERNO | |
324 | end_addr = flash_sect_addr + len - 1; | |
325 | #else | |
326 | /* this is the last sector, and the size is hardcoded here */ | |
327 | /* otherwise we will get stack problems on loading 128 KB environment */ | |
328 | end_addr = flash_sect_addr + 0x20000 - 1; | |
329 | #endif | |
330 | ||
331 | debug ("Protect off %08lX ... %08lX\n", | |
332 | (ulong)flash_sect_addr, end_addr); | |
333 | ||
334 | if (flash_sect_protect (0, flash_sect_addr, end_addr)) | |
335 | return 1; | |
336 | ||
337 | puts ("Erasing Flash..."); | |
338 | if (flash_sect_erase (flash_sect_addr, end_addr)) | |
339 | return 1; | |
340 | ||
341 | puts ("Writing to Flash... "); | |
342 | rc = flash_write(env_buffer, flash_sect_addr, len); | |
343 | if (rc != 0) { | |
344 | flash_perror (rc); | |
345 | rcode = 1; | |
346 | } else { | |
347 | puts ("done\n"); | |
348 | } | |
349 | ||
350 | /* try to re-protect */ | |
351 | (void) flash_sect_protect (1, flash_sect_addr, end_addr); | |
352 | return rcode; | |
353 | } | |
354 | ||
355 | #endif /* CMD_SAVEENV */ | |
356 | ||
357 | #endif /* CFG_ENV_ADDR_REDUND */ | |
358 | ||
359 | void env_relocate_spec (void) | |
360 | { | |
361 | #if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND) | |
362 | #ifdef CFG_ENV_ADDR_REDUND | |
363 | DECLARE_GLOBAL_DATA_PTR; | |
364 | ||
365 | if (gd->env_addr != (ulong)&(flash_addr->data)) | |
366 | { | |
367 | env_t * etmp = flash_addr; | |
368 | ulong ltmp = end_addr; | |
369 | ||
370 | flash_addr = flash_addr_new; | |
371 | flash_addr_new = etmp; | |
372 | ||
373 | end_addr = end_addr_new; | |
374 | end_addr_new = ltmp; | |
375 | } | |
376 | ||
377 | if (flash_addr_new->flags != obsolete_flag && | |
378 | crc32(0, flash_addr_new->data, ENV_SIZE) == | |
379 | flash_addr_new->crc) | |
380 | { | |
381 | gd->env_valid = 2; | |
382 | flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new); | |
383 | flash_write((char *)&obsolete_flag, | |
384 | (ulong)&(flash_addr_new->flags), | |
385 | sizeof(flash_addr_new->flags)); | |
386 | flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new); | |
387 | } | |
388 | ||
389 | if (flash_addr->flags != active_flag && | |
390 | (flash_addr->flags & active_flag) == active_flag) | |
391 | { | |
392 | gd->env_valid = 2; | |
393 | flash_sect_protect (0, (ulong)flash_addr, end_addr); | |
394 | flash_write((char *)&active_flag, | |
395 | (ulong)&(flash_addr->flags), | |
396 | sizeof(flash_addr->flags)); | |
397 | flash_sect_protect (1, (ulong)flash_addr, end_addr); | |
398 | } | |
399 | ||
400 | if (gd->env_valid == 2) | |
401 | puts ("*** Warning - some problems detected " | |
402 | "reading environment; recovered successfully\n\n"); | |
403 | #endif /* CFG_ENV_ADDR_REDUND */ | |
404 | memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE); | |
405 | #endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */ | |
406 | } | |
407 | ||
43d9616c | 408 | #endif /* CFG_ENV_IS_IN_FLASH */ |