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wdenkc6097192002-11-03 00:24:07 +00001/*
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>
wdenkc6097192002-11-03 00:24:07 +000030#include <command.h>
31#include <environment.h>
wdenkc6097192002-11-03 00:24:07 +000032#include <linux/stddef.h>
wdenk47cd00f2003-03-06 13:39:27 +000033#include <malloc.h>
wdenkc6097192002-11-03 00:24:07 +000034
Wolfgang Denkd87080b2006-03-31 18:32:53 +020035DECLARE_GLOBAL_DATA_PTR;
36
Mike Frysingerbdab39d2009-01-28 19:08:14 -050037#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
wdenkc6097192002-11-03 00:24:07 +000038#define CMD_SAVEENV
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020039#elif defined(CONFIG_ENV_ADDR_REDUND)
Mike Frysingerbdab39d2009-01-28 19:08:14 -050040#error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
wdenkc6097192002-11-03 00:24:07 +000041#endif
42
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020043#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
44#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
wdenkc6097192002-11-03 00:24:07 +000045#endif
46
47#ifdef CONFIG_INFERNO
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020048# ifdef CONFIG_ENV_ADDR_REDUND
49#error CONFIG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
wdenkc6097192002-11-03 00:24:07 +000050# endif
51#endif
52
53char * env_name_spec = "Flash";
54
55#ifdef ENV_IS_EMBEDDED
56
57extern uchar environment[];
58env_t *env_ptr = (env_t *)(&environment[0]);
59
60#ifdef CMD_SAVEENV
61/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020062static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
wdenkc6097192002-11-03 00:24:07 +000063#endif
64
65#else /* ! ENV_IS_EMBEDDED */
66
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020067env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
wdenkc6097192002-11-03 00:24:07 +000068#ifdef CMD_SAVEENV
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020069static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
wdenkc6097192002-11-03 00:24:07 +000070#endif
71
72#endif /* ENV_IS_EMBEDDED */
73
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020074#ifdef CONFIG_ENV_ADDR_REDUND
75static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
wdenkc6097192002-11-03 00:24:07 +000076
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020077/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
78static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
79static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
wdenkc6097192002-11-03 00:24:07 +000080
wdenkc3f9d492004-03-14 00:59:59 +000081#define ACTIVE_FLAG 1
82#define OBSOLETE_FLAG 0
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020083#endif /* CONFIG_ENV_ADDR_REDUND */
wdenkc6097192002-11-03 00:24:07 +000084
85extern uchar default_environment[];
86extern int default_environment_size;
87
88
89uchar env_get_char_spec (int index)
90{
wdenkc6097192002-11-03 00:24:07 +000091 return ( *((uchar *)(gd->env_addr + index)) );
92}
93
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020094#ifdef CONFIG_ENV_ADDR_REDUND
wdenkc6097192002-11-03 00:24:07 +000095
96int env_init(void)
97{
wdenk8ed96042005-01-09 23:16:25 +000098 int crc1_ok = 0, crc2_ok = 0;
wdenkc6097192002-11-03 00:24:07 +000099
100 uchar flag1 = flash_addr->flags;
101 uchar flag2 = flash_addr_new->flags;
102
103 ulong addr_default = (ulong)&default_environment[0];
104 ulong addr1 = (ulong)&(flash_addr->data);
105 ulong addr2 = (ulong)&(flash_addr_new->data);
106
wdenk8ed96042005-01-09 23:16:25 +0000107 crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
108 crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
109
wdenkc3f9d492004-03-14 00:59:59 +0000110 if (crc1_ok && ! crc2_ok) {
wdenkc6097192002-11-03 00:24:07 +0000111 gd->env_addr = addr1;
112 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000113 } else if (! crc1_ok && crc2_ok) {
wdenkc6097192002-11-03 00:24:07 +0000114 gd->env_addr = addr2;
115 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000116 } else if (! crc1_ok && ! crc2_ok) {
wdenkc6097192002-11-03 00:24:07 +0000117 gd->env_addr = addr_default;
118 gd->env_valid = 0;
wdenkc3f9d492004-03-14 00:59:59 +0000119 } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
wdenkc6097192002-11-03 00:24:07 +0000120 gd->env_addr = addr1;
121 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000122 } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
wdenkc6097192002-11-03 00:24:07 +0000123 gd->env_addr = addr2;
124 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000125 } else if (flag1 == flag2) {
wdenkc6097192002-11-03 00:24:07 +0000126 gd->env_addr = addr1;
127 gd->env_valid = 2;
wdenkc3f9d492004-03-14 00:59:59 +0000128 } else if (flag1 == 0xFF) {
wdenkc6097192002-11-03 00:24:07 +0000129 gd->env_addr = addr1;
130 gd->env_valid = 2;
wdenkc3f9d492004-03-14 00:59:59 +0000131 } else if (flag2 == 0xFF) {
wdenkc6097192002-11-03 00:24:07 +0000132 gd->env_addr = addr2;
133 gd->env_valid = 2;
134 }
135
136 return (0);
137}
138
139#ifdef CMD_SAVEENV
140int saveenv(void)
141{
wdenk47cd00f2003-03-06 13:39:27 +0000142 char *saved_data = NULL;
wdenk500545c2003-03-06 14:23:06 +0000143 int rc = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000144 char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200145#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
wdenk500545c2003-03-06 14:23:06 +0000146 ulong up_data = 0;
147#endif
wdenkc6097192002-11-03 00:24:07 +0000148
149 debug ("Protect off %08lX ... %08lX\n",
150 (ulong)flash_addr, end_addr);
151
152 if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
153 goto Done;
154 }
155
156 debug ("Protect off %08lX ... %08lX\n",
157 (ulong)flash_addr_new, end_addr_new);
158
159 if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
160 goto Done;
161 }
162
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200163#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
164 up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE));
wdenk47cd00f2003-03-06 13:39:27 +0000165 debug ("Data to save 0x%x\n", up_data);
166 if (up_data) {
167 if ((saved_data = malloc(up_data)) == NULL) {
wdenk8bde7f72003-06-27 21:31:46 +0000168 printf("Unable to save the rest of sector (%ld)\n",
wdenk47cd00f2003-03-06 13:39:27 +0000169 up_data);
170 goto Done;
171 }
wdenk8bde7f72003-06-27 21:31:46 +0000172 memcpy(saved_data,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200173 (void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data);
wdenk8bde7f72003-06-27 21:31:46 +0000174 debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200175 (long)flash_addr_new + CONFIG_ENV_SIZE,
wdenk47cd00f2003-03-06 13:39:27 +0000176 up_data, saved_data);
177 }
178#endif
wdenkc6097192002-11-03 00:24:07 +0000179 puts ("Erasing Flash...");
180 debug (" %08lX ... %08lX ...",
181 (ulong)flash_addr_new, end_addr_new);
182
183 if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
184 goto Done;
185 }
186
187 puts ("Writing to Flash... ");
188 debug (" %08lX ... %08lX ...",
189 (ulong)&(flash_addr_new->data),
190 sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200191 if ((rc = flash_write((char *)env_ptr->data,
wdenk8bde7f72003-06-27 21:31:46 +0000192 (ulong)&(flash_addr_new->data),
wdenkc40b2952004-03-13 23:29:43 +0000193 sizeof(env_ptr->data))) ||
wdenkc40b2952004-03-13 23:29:43 +0000194 (rc = flash_write((char *)&(env_ptr->crc),
wdenk8bde7f72003-06-27 21:31:46 +0000195 (ulong)&(flash_addr_new->crc),
wdenkc40b2952004-03-13 23:29:43 +0000196 sizeof(env_ptr->crc))) ||
wdenkc3f9d492004-03-14 00:59:59 +0000197 (rc = flash_write(&flag,
wdenk8bde7f72003-06-27 21:31:46 +0000198 (ulong)&(flash_addr->flags),
wdenkc40b2952004-03-13 23:29:43 +0000199 sizeof(flash_addr->flags))) ||
wdenkc3f9d492004-03-14 00:59:59 +0000200 (rc = flash_write(&new_flag,
wdenk8bde7f72003-06-27 21:31:46 +0000201 (ulong)&(flash_addr_new->flags),
wdenkc40b2952004-03-13 23:29:43 +0000202 sizeof(flash_addr_new->flags))))
wdenkc6097192002-11-03 00:24:07 +0000203 {
204 flash_perror (rc);
205 goto Done;
206 }
207 puts ("done\n");
208
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200209#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
wdenk47cd00f2003-03-06 13:39:27 +0000210 if (up_data) { /* restore the rest of sector */
211 debug ("Restoring the rest of data to 0x%x len 0x%x\n",
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200212 (long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
wdenk8bde7f72003-06-27 21:31:46 +0000213 if (flash_write(saved_data,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200214 (long)flash_addr_new + CONFIG_ENV_SIZE,
wdenk47cd00f2003-03-06 13:39:27 +0000215 up_data)) {
216 flash_perror(rc);
217 goto Done;
218 }
219 }
220#endif
wdenkc6097192002-11-03 00:24:07 +0000221 {
222 env_t * etmp = flash_addr;
223 ulong ltmp = end_addr;
224
225 flash_addr = flash_addr_new;
226 flash_addr_new = etmp;
227
228 end_addr = end_addr_new;
229 end_addr_new = ltmp;
230 }
231
232 rc = 0;
233Done:
234
wdenk47cd00f2003-03-06 13:39:27 +0000235 if (saved_data)
236 free (saved_data);
wdenkc6097192002-11-03 00:24:07 +0000237 /* try to re-protect */
238 (void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
239 (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
240
241 return rc;
242}
243#endif /* CMD_SAVEENV */
244
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200245#else /* ! CONFIG_ENV_ADDR_REDUND */
wdenkc6097192002-11-03 00:24:07 +0000246
247int env_init(void)
248{
wdenkc6097192002-11-03 00:24:07 +0000249 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
250 gd->env_addr = (ulong)&(env_ptr->data);
251 gd->env_valid = 1;
wdenk8ed96042005-01-09 23:16:25 +0000252 return(0);
wdenkc6097192002-11-03 00:24:07 +0000253 }
Dirk Behme9bb8b202007-08-20 07:09:05 +0200254
wdenk8ed96042005-01-09 23:16:25 +0000255 gd->env_addr = (ulong)&default_environment[0];
256 gd->env_valid = 0;
wdenkc6097192002-11-03 00:24:07 +0000257 return (0);
258}
259
260#ifdef CMD_SAVEENV
261
262int saveenv(void)
263{
264 int len, rc;
265 ulong end_addr;
266 ulong flash_sect_addr;
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200267#if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
wdenkc6097192002-11-03 00:24:07 +0000268 ulong flash_offset;
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200269 uchar env_buffer[CONFIG_ENV_SECT_SIZE];
wdenkc6097192002-11-03 00:24:07 +0000270#else
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200271 uchar *env_buffer = (uchar *)env_ptr;
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200272#endif /* CONFIG_ENV_SECT_SIZE */
wdenkc6097192002-11-03 00:24:07 +0000273 int rcode = 0;
274
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200275#if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
wdenkc6097192002-11-03 00:24:07 +0000276
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200277 flash_offset = ((ulong)flash_addr) & (CONFIG_ENV_SECT_SIZE-1);
278 flash_sect_addr = ((ulong)flash_addr) & ~(CONFIG_ENV_SECT_SIZE-1);
wdenkc6097192002-11-03 00:24:07 +0000279
280 debug ( "copy old content: "
281 "sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
282 flash_sect_addr, (ulong)flash_addr, flash_offset);
283
284 /* copy old contents to temporary buffer */
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200285 memcpy (env_buffer, (void *)flash_sect_addr, CONFIG_ENV_SECT_SIZE);
wdenkc6097192002-11-03 00:24:07 +0000286
287 /* copy current environment to temporary buffer */
288 memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
289 env_ptr,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200290 CONFIG_ENV_SIZE);
wdenkc6097192002-11-03 00:24:07 +0000291
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200292 len = CONFIG_ENV_SECT_SIZE;
wdenkc6097192002-11-03 00:24:07 +0000293#else
294 flash_sect_addr = (ulong)flash_addr;
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200295 len = CONFIG_ENV_SIZE;
296#endif /* CONFIG_ENV_SECT_SIZE */
wdenkc6097192002-11-03 00:24:07 +0000297
298#ifndef CONFIG_INFERNO
299 end_addr = flash_sect_addr + len - 1;
300#else
301 /* this is the last sector, and the size is hardcoded here */
302 /* otherwise we will get stack problems on loading 128 KB environment */
303 end_addr = flash_sect_addr + 0x20000 - 1;
304#endif
305
306 debug ("Protect off %08lX ... %08lX\n",
307 (ulong)flash_sect_addr, end_addr);
308
309 if (flash_sect_protect (0, flash_sect_addr, end_addr))
310 return 1;
311
312 puts ("Erasing Flash...");
313 if (flash_sect_erase (flash_sect_addr, end_addr))
314 return 1;
315
316 puts ("Writing to Flash... ");
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200317 rc = flash_write((char *)env_buffer, flash_sect_addr, len);
wdenkc6097192002-11-03 00:24:07 +0000318 if (rc != 0) {
319 flash_perror (rc);
320 rcode = 1;
321 } else {
322 puts ("done\n");
323 }
324
325 /* try to re-protect */
326 (void) flash_sect_protect (1, flash_sect_addr, end_addr);
327 return rcode;
328}
329
330#endif /* CMD_SAVEENV */
331
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200332#endif /* CONFIG_ENV_ADDR_REDUND */
wdenkc6097192002-11-03 00:24:07 +0000333
334void env_relocate_spec (void)
335{
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200336#if !defined(ENV_IS_EMBEDDED) || defined(CONFIG_ENV_ADDR_REDUND)
337#ifdef CONFIG_ENV_ADDR_REDUND
wdenkc3f9d492004-03-14 00:59:59 +0000338 if (gd->env_addr != (ulong)&(flash_addr->data)) {
wdenkc6097192002-11-03 00:24:07 +0000339 env_t * etmp = flash_addr;
340 ulong ltmp = end_addr;
341
342 flash_addr = flash_addr_new;
343 flash_addr_new = etmp;
344
345 end_addr = end_addr_new;
346 end_addr_new = ltmp;
347 }
348
wdenkc3f9d492004-03-14 00:59:59 +0000349 if (flash_addr_new->flags != OBSOLETE_FLAG &&
wdenkc6097192002-11-03 00:24:07 +0000350 crc32(0, flash_addr_new->data, ENV_SIZE) ==
wdenkc3f9d492004-03-14 00:59:59 +0000351 flash_addr_new->crc) {
352 char flag = OBSOLETE_FLAG;
353
wdenkc6097192002-11-03 00:24:07 +0000354 gd->env_valid = 2;
355 flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
wdenkc3f9d492004-03-14 00:59:59 +0000356 flash_write(&flag,
wdenk8bde7f72003-06-27 21:31:46 +0000357 (ulong)&(flash_addr_new->flags),
358 sizeof(flash_addr_new->flags));
wdenkc6097192002-11-03 00:24:07 +0000359 flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
360 }
361
wdenkc3f9d492004-03-14 00:59:59 +0000362 if (flash_addr->flags != ACTIVE_FLAG &&
363 (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
364 char flag = ACTIVE_FLAG;
365
wdenkc6097192002-11-03 00:24:07 +0000366 gd->env_valid = 2;
367 flash_sect_protect (0, (ulong)flash_addr, end_addr);
wdenkc3f9d492004-03-14 00:59:59 +0000368 flash_write(&flag,
wdenk8bde7f72003-06-27 21:31:46 +0000369 (ulong)&(flash_addr->flags),
370 sizeof(flash_addr->flags));
wdenkc6097192002-11-03 00:24:07 +0000371 flash_sect_protect (1, (ulong)flash_addr, end_addr);
372 }
373
374 if (gd->env_valid == 2)
375 puts ("*** Warning - some problems detected "
376 "reading environment; recovered successfully\n\n");
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200377#endif /* CONFIG_ENV_ADDR_REDUND */
Mike Frysinger4acc2a12008-05-02 18:17:50 -0400378#ifdef CMD_SAVEENV
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200379 memcpy (env_ptr, (void*)flash_addr, CONFIG_ENV_SIZE);
Mike Frysinger4acc2a12008-05-02 18:17:50 -0400380#endif
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200381#endif /* ! ENV_IS_EMBEDDED || CONFIG_ENV_ADDR_REDUND */
wdenkc6097192002-11-03 00:24:07 +0000382}