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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>
30
31#if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */
32
33#include <command.h>
34#include <environment.h>
wdenkc6097192002-11-03 00:24:07 +000035#include <linux/stddef.h>
wdenk47cd00f2003-03-06 13:39:27 +000036#include <malloc.h>
wdenkc6097192002-11-03 00:24:07 +000037
Wolfgang Denkd87080b2006-03-31 18:32:53 +020038DECLARE_GLOBAL_DATA_PTR;
39
Jon Loeligerc3517f92007-07-08 18:10:08 -050040#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)
wdenkc6097192002-11-03 00:24:07 +000041#define CMD_SAVEENV
42#elif defined(CFG_ENV_ADDR_REDUND)
Jon Loeliger90253172007-07-10 11:02:44 -050043#error Cannot use CFG_ENV_ADDR_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_FLASH
wdenkc6097192002-11-03 00:24:07 +000044#endif
45
wdenkc6097192002-11-03 00:24:07 +000046#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
47#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
48#endif
49
50#ifdef CONFIG_INFERNO
51# ifdef CFG_ENV_ADDR_REDUND
52#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
53# endif
54#endif
55
56char * env_name_spec = "Flash";
57
58#ifdef ENV_IS_EMBEDDED
59
60extern uchar environment[];
61env_t *env_ptr = (env_t *)(&environment[0]);
62
63#ifdef CMD_SAVEENV
64/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
65static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
66#endif
67
68#else /* ! ENV_IS_EMBEDDED */
69
70env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
71#ifdef CMD_SAVEENV
72static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
73#endif
74
75#endif /* ENV_IS_EMBEDDED */
76
77#ifdef CFG_ENV_ADDR_REDUND
78static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
79
wdenk47cd00f2003-03-06 13:39:27 +000080/* CFG_ENV_ADDR is supposed to be on sector boundary */
81static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1;
82static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1;
wdenkc6097192002-11-03 00:24:07 +000083
wdenkc3f9d492004-03-14 00:59:59 +000084#define ACTIVE_FLAG 1
85#define OBSOLETE_FLAG 0
86#endif /* CFG_ENV_ADDR_REDUND */
wdenkc6097192002-11-03 00:24:07 +000087
88extern uchar default_environment[];
89extern int default_environment_size;
90
91
92uchar env_get_char_spec (int index)
93{
wdenkc6097192002-11-03 00:24:07 +000094 return ( *((uchar *)(gd->env_addr + index)) );
95}
96
97#ifdef CFG_ENV_ADDR_REDUND
98
99int env_init(void)
100{
wdenk8ed96042005-01-09 23:16:25 +0000101 int crc1_ok = 0, crc2_ok = 0;
wdenkc6097192002-11-03 00:24:07 +0000102
103 uchar flag1 = flash_addr->flags;
104 uchar flag2 = flash_addr_new->flags;
105
106 ulong addr_default = (ulong)&default_environment[0];
107 ulong addr1 = (ulong)&(flash_addr->data);
108 ulong addr2 = (ulong)&(flash_addr_new->data);
109
wdenk8ed96042005-01-09 23:16:25 +0000110#ifdef CONFIG_OMAP2420H4
111 int flash_probe(void);
112
113 if(flash_probe() == 0)
114 goto bad_flash;
115#endif
116
117 crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
118 crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
119
wdenkc3f9d492004-03-14 00:59:59 +0000120 if (crc1_ok && ! crc2_ok) {
wdenkc6097192002-11-03 00:24:07 +0000121 gd->env_addr = addr1;
122 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000123 } else if (! crc1_ok && crc2_ok) {
wdenkc6097192002-11-03 00:24:07 +0000124 gd->env_addr = addr2;
125 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000126 } else if (! crc1_ok && ! crc2_ok) {
wdenkc6097192002-11-03 00:24:07 +0000127 gd->env_addr = addr_default;
128 gd->env_valid = 0;
wdenkc3f9d492004-03-14 00:59:59 +0000129 } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
wdenkc6097192002-11-03 00:24:07 +0000130 gd->env_addr = addr1;
131 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000132 } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
wdenkc6097192002-11-03 00:24:07 +0000133 gd->env_addr = addr2;
134 gd->env_valid = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000135 } else if (flag1 == flag2) {
wdenkc6097192002-11-03 00:24:07 +0000136 gd->env_addr = addr1;
137 gd->env_valid = 2;
wdenkc3f9d492004-03-14 00:59:59 +0000138 } else if (flag1 == 0xFF) {
wdenkc6097192002-11-03 00:24:07 +0000139 gd->env_addr = addr1;
140 gd->env_valid = 2;
wdenkc3f9d492004-03-14 00:59:59 +0000141 } else if (flag2 == 0xFF) {
wdenkc6097192002-11-03 00:24:07 +0000142 gd->env_addr = addr2;
143 gd->env_valid = 2;
144 }
145
wdenk8ed96042005-01-09 23:16:25 +0000146#ifdef CONFIG_OMAP2420H4
147bad_flash:
148#endif
wdenkc6097192002-11-03 00:24:07 +0000149 return (0);
150}
151
152#ifdef CMD_SAVEENV
153int saveenv(void)
154{
wdenk47cd00f2003-03-06 13:39:27 +0000155 char *saved_data = NULL;
wdenk500545c2003-03-06 14:23:06 +0000156 int rc = 1;
wdenkc3f9d492004-03-14 00:59:59 +0000157 char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
wdenk500545c2003-03-06 14:23:06 +0000158#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
159 ulong up_data = 0;
160#endif
wdenkc6097192002-11-03 00:24:07 +0000161
162 debug ("Protect off %08lX ... %08lX\n",
163 (ulong)flash_addr, end_addr);
164
165 if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
166 goto Done;
167 }
168
169 debug ("Protect off %08lX ... %08lX\n",
170 (ulong)flash_addr_new, end_addr_new);
171
172 if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
173 goto Done;
174 }
175
wdenk47cd00f2003-03-06 13:39:27 +0000176#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
177 up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
178 debug ("Data to save 0x%x\n", up_data);
179 if (up_data) {
180 if ((saved_data = malloc(up_data)) == NULL) {
wdenk8bde7f72003-06-27 21:31:46 +0000181 printf("Unable to save the rest of sector (%ld)\n",
wdenk47cd00f2003-03-06 13:39:27 +0000182 up_data);
183 goto Done;
184 }
wdenk8bde7f72003-06-27 21:31:46 +0000185 memcpy(saved_data,
wdenk47cd00f2003-03-06 13:39:27 +0000186 (void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data);
wdenk8bde7f72003-06-27 21:31:46 +0000187 debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
188 (long)flash_addr_new + CFG_ENV_SIZE,
wdenk47cd00f2003-03-06 13:39:27 +0000189 up_data, saved_data);
190 }
191#endif
wdenkc6097192002-11-03 00:24:07 +0000192 puts ("Erasing Flash...");
193 debug (" %08lX ... %08lX ...",
194 (ulong)flash_addr_new, end_addr_new);
195
196 if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
197 goto Done;
198 }
199
200 puts ("Writing to Flash... ");
201 debug (" %08lX ... %08lX ...",
202 (ulong)&(flash_addr_new->data),
203 sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200204 if ((rc = flash_write((char *)env_ptr->data,
wdenk8bde7f72003-06-27 21:31:46 +0000205 (ulong)&(flash_addr_new->data),
wdenkc40b2952004-03-13 23:29:43 +0000206 sizeof(env_ptr->data))) ||
wdenkc40b2952004-03-13 23:29:43 +0000207 (rc = flash_write((char *)&(env_ptr->crc),
wdenk8bde7f72003-06-27 21:31:46 +0000208 (ulong)&(flash_addr_new->crc),
wdenkc40b2952004-03-13 23:29:43 +0000209 sizeof(env_ptr->crc))) ||
wdenkc3f9d492004-03-14 00:59:59 +0000210 (rc = flash_write(&flag,
wdenk8bde7f72003-06-27 21:31:46 +0000211 (ulong)&(flash_addr->flags),
wdenkc40b2952004-03-13 23:29:43 +0000212 sizeof(flash_addr->flags))) ||
wdenkc3f9d492004-03-14 00:59:59 +0000213 (rc = flash_write(&new_flag,
wdenk8bde7f72003-06-27 21:31:46 +0000214 (ulong)&(flash_addr_new->flags),
wdenkc40b2952004-03-13 23:29:43 +0000215 sizeof(flash_addr_new->flags))))
wdenkc6097192002-11-03 00:24:07 +0000216 {
217 flash_perror (rc);
218 goto Done;
219 }
220 puts ("done\n");
221
wdenk47cd00f2003-03-06 13:39:27 +0000222#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
223 if (up_data) { /* restore the rest of sector */
224 debug ("Restoring the rest of data to 0x%x len 0x%x\n",
225 (long)flash_addr_new + CFG_ENV_SIZE, up_data);
wdenk8bde7f72003-06-27 21:31:46 +0000226 if (flash_write(saved_data,
227 (long)flash_addr_new + CFG_ENV_SIZE,
wdenk47cd00f2003-03-06 13:39:27 +0000228 up_data)) {
229 flash_perror(rc);
230 goto Done;
231 }
232 }
233#endif
wdenkc6097192002-11-03 00:24:07 +0000234 {
235 env_t * etmp = flash_addr;
236 ulong ltmp = end_addr;
237
238 flash_addr = flash_addr_new;
239 flash_addr_new = etmp;
240
241 end_addr = end_addr_new;
242 end_addr_new = ltmp;
243 }
244
245 rc = 0;
246Done:
247
wdenk47cd00f2003-03-06 13:39:27 +0000248 if (saved_data)
249 free (saved_data);
wdenkc6097192002-11-03 00:24:07 +0000250 /* try to re-protect */
251 (void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
252 (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
253
254 return rc;
255}
256#endif /* CMD_SAVEENV */
257
258#else /* ! CFG_ENV_ADDR_REDUND */
259
260int env_init(void)
261{
wdenk8ed96042005-01-09 23:16:25 +0000262#ifdef CONFIG_OMAP2420H4
263 int flash_probe(void);
wdenkc6097192002-11-03 00:24:07 +0000264
wdenk8ed96042005-01-09 23:16:25 +0000265 if(flash_probe() == 0)
266 goto bad_flash;
267#endif
wdenkc6097192002-11-03 00:24:07 +0000268 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
269 gd->env_addr = (ulong)&(env_ptr->data);
270 gd->env_valid = 1;
wdenk8ed96042005-01-09 23:16:25 +0000271 return(0);
wdenkc6097192002-11-03 00:24:07 +0000272 }
wdenk8ed96042005-01-09 23:16:25 +0000273#ifdef CONFIG_OMAP2420H4
274bad_flash:
275#endif
276 gd->env_addr = (ulong)&default_environment[0];
277 gd->env_valid = 0;
wdenkc6097192002-11-03 00:24:07 +0000278 return (0);
279}
280
281#ifdef CMD_SAVEENV
282
283int saveenv(void)
284{
285 int len, rc;
286 ulong end_addr;
287 ulong flash_sect_addr;
288#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
289 ulong flash_offset;
290 uchar env_buffer[CFG_ENV_SECT_SIZE];
291#else
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200292 uchar *env_buffer = (uchar *)env_ptr;
wdenkc6097192002-11-03 00:24:07 +0000293#endif /* CFG_ENV_SECT_SIZE */
294 int rcode = 0;
295
296#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
297
298 flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
299 flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
300
301 debug ( "copy old content: "
302 "sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
303 flash_sect_addr, (ulong)flash_addr, flash_offset);
304
305 /* copy old contents to temporary buffer */
306 memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
307
308 /* copy current environment to temporary buffer */
309 memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
310 env_ptr,
311 CFG_ENV_SIZE);
312
313 len = CFG_ENV_SECT_SIZE;
314#else
315 flash_sect_addr = (ulong)flash_addr;
316 len = CFG_ENV_SIZE;
317#endif /* CFG_ENV_SECT_SIZE */
318
319#ifndef CONFIG_INFERNO
320 end_addr = flash_sect_addr + len - 1;
321#else
322 /* this is the last sector, and the size is hardcoded here */
323 /* otherwise we will get stack problems on loading 128 KB environment */
324 end_addr = flash_sect_addr + 0x20000 - 1;
325#endif
326
327 debug ("Protect off %08lX ... %08lX\n",
328 (ulong)flash_sect_addr, end_addr);
329
330 if (flash_sect_protect (0, flash_sect_addr, end_addr))
331 return 1;
332
333 puts ("Erasing Flash...");
334 if (flash_sect_erase (flash_sect_addr, end_addr))
335 return 1;
336
337 puts ("Writing to Flash... ");
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200338 rc = flash_write((char *)env_buffer, flash_sect_addr, len);
wdenkc6097192002-11-03 00:24:07 +0000339 if (rc != 0) {
340 flash_perror (rc);
341 rcode = 1;
342 } else {
343 puts ("done\n");
344 }
345
346 /* try to re-protect */
347 (void) flash_sect_protect (1, flash_sect_addr, end_addr);
348 return rcode;
349}
350
351#endif /* CMD_SAVEENV */
352
353#endif /* CFG_ENV_ADDR_REDUND */
354
355void env_relocate_spec (void)
356{
357#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
358#ifdef CFG_ENV_ADDR_REDUND
wdenkc3f9d492004-03-14 00:59:59 +0000359 if (gd->env_addr != (ulong)&(flash_addr->data)) {
wdenkc6097192002-11-03 00:24:07 +0000360 env_t * etmp = flash_addr;
361 ulong ltmp = end_addr;
362
363 flash_addr = flash_addr_new;
364 flash_addr_new = etmp;
365
366 end_addr = end_addr_new;
367 end_addr_new = ltmp;
368 }
369
wdenkc3f9d492004-03-14 00:59:59 +0000370 if (flash_addr_new->flags != OBSOLETE_FLAG &&
wdenkc6097192002-11-03 00:24:07 +0000371 crc32(0, flash_addr_new->data, ENV_SIZE) ==
wdenkc3f9d492004-03-14 00:59:59 +0000372 flash_addr_new->crc) {
373 char flag = OBSOLETE_FLAG;
374
wdenkc6097192002-11-03 00:24:07 +0000375 gd->env_valid = 2;
376 flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
wdenkc3f9d492004-03-14 00:59:59 +0000377 flash_write(&flag,
wdenk8bde7f72003-06-27 21:31:46 +0000378 (ulong)&(flash_addr_new->flags),
379 sizeof(flash_addr_new->flags));
wdenkc6097192002-11-03 00:24:07 +0000380 flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
381 }
382
wdenkc3f9d492004-03-14 00:59:59 +0000383 if (flash_addr->flags != ACTIVE_FLAG &&
384 (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
385 char flag = ACTIVE_FLAG;
386
wdenkc6097192002-11-03 00:24:07 +0000387 gd->env_valid = 2;
388 flash_sect_protect (0, (ulong)flash_addr, end_addr);
wdenkc3f9d492004-03-14 00:59:59 +0000389 flash_write(&flag,
wdenk8bde7f72003-06-27 21:31:46 +0000390 (ulong)&(flash_addr->flags),
391 sizeof(flash_addr->flags));
wdenkc6097192002-11-03 00:24:07 +0000392 flash_sect_protect (1, (ulong)flash_addr, end_addr);
393 }
394
395 if (gd->env_valid == 2)
396 puts ("*** Warning - some problems detected "
397 "reading environment; recovered successfully\n\n");
398#endif /* CFG_ENV_ADDR_REDUND */
399 memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
400#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
401}
402
wdenk43d96162003-03-06 00:02:04 +0000403#endif /* CFG_ENV_IS_IN_FLASH */