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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>
35#include <cmd_nvedit.h>
36#include <linux/stddef.h>
37
38#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
39#define CMD_SAVEENV
40#elif defined(CFG_ENV_ADDR_REDUND)
41#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
42#endif
43
44#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \
45 defined(CFG_ENV_ADDR_REDUND)
46#error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
47#endif
48
49#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
50#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
51#endif
52
53#ifdef CONFIG_INFERNO
54# ifdef CFG_ENV_ADDR_REDUND
55#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
56# endif
57#endif
58
59char * env_name_spec = "Flash";
60
61#ifdef ENV_IS_EMBEDDED
62
63extern uchar environment[];
64env_t *env_ptr = (env_t *)(&environment[0]);
65
66#ifdef CMD_SAVEENV
67/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
68static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
69#endif
70
71#else /* ! ENV_IS_EMBEDDED */
72
73env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
74#ifdef CMD_SAVEENV
75static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
76#endif
77
78#endif /* ENV_IS_EMBEDDED */
79
80#ifdef CFG_ENV_ADDR_REDUND
81static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
82
83static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SIZE - 1;
84static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1;
85
86static uchar active_flag = 1;
87static uchar obsolete_flag = 0;
88#endif
89
90extern uchar default_environment[];
91extern int default_environment_size;
92
93
94uchar env_get_char_spec (int index)
95{
96 DECLARE_GLOBAL_DATA_PTR;
97
98 return ( *((uchar *)(gd->env_addr + index)) );
99}
100
101#ifdef CFG_ENV_ADDR_REDUND
102
103int env_init(void)
104{
105 DECLARE_GLOBAL_DATA_PTR;
106
107 int crc1_ok =
108 (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
109 int crc2_ok =
110 (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
111
112 uchar flag1 = flash_addr->flags;
113 uchar flag2 = flash_addr_new->flags;
114
115 ulong addr_default = (ulong)&default_environment[0];
116 ulong addr1 = (ulong)&(flash_addr->data);
117 ulong addr2 = (ulong)&(flash_addr_new->data);
118
119 if (crc1_ok && ! crc2_ok)
120 {
121 gd->env_addr = addr1;
122 gd->env_valid = 1;
123 }
124 else if (! crc1_ok && crc2_ok)
125 {
126 gd->env_addr = addr2;
127 gd->env_valid = 1;
128 }
129 else if (! crc1_ok && ! crc2_ok)
130 {
131 gd->env_addr = addr_default;
132 gd->env_valid = 0;
133 }
134 else if (flag1 == active_flag && flag2 == obsolete_flag)
135 {
136 gd->env_addr = addr1;
137 gd->env_valid = 1;
138 }
139 else if (flag1 == obsolete_flag && flag2 == active_flag)
140 {
141 gd->env_addr = addr2;
142 gd->env_valid = 1;
143 }
144 else if (flag1 == flag2)
145 {
146 gd->env_addr = addr1;
147 gd->env_valid = 2;
148 }
149 else if (flag1 == 0xFF)
150 {
151 gd->env_addr = addr1;
152 gd->env_valid = 2;
153 }
154 else if (flag2 == 0xFF)
155 {
156 gd->env_addr = addr2;
157 gd->env_valid = 2;
158 }
159
160 return (0);
161}
162
163#ifdef CMD_SAVEENV
164int saveenv(void)
165{
166 int rc = 1;
167
168 debug ("Protect off %08lX ... %08lX\n",
169 (ulong)flash_addr, end_addr);
170
171 if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
172 goto Done;
173 }
174
175 debug ("Protect off %08lX ... %08lX\n",
176 (ulong)flash_addr_new, end_addr_new);
177
178 if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
179 goto Done;
180 }
181
182 puts ("Erasing Flash...");
183 debug (" %08lX ... %08lX ...",
184 (ulong)flash_addr_new, end_addr_new);
185
186 if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
187 goto Done;
188 }
189
190 puts ("Writing to Flash... ");
191 debug (" %08lX ... %08lX ...",
192 (ulong)&(flash_addr_new->data),
193 sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
194 if (flash_write(env_ptr->data,
195 (ulong)&(flash_addr_new->data),
196 sizeof(env_ptr->data)) ||
197
198 flash_write((char *)&(env_ptr->crc),
199 (ulong)&(flash_addr_new->crc),
200 sizeof(env_ptr->crc)) ||
201
202 flash_write((char *)&obsolete_flag,
203 (ulong)&(flash_addr->flags),
204 sizeof(flash_addr->flags)) ||
205
206 flash_write((char *)&active_flag,
207 (ulong)&(flash_addr_new->flags),
208 sizeof(flash_addr_new->flags)))
209 {
210 flash_perror (rc);
211 goto Done;
212 }
213 puts ("done\n");
214
215 {
216 env_t * etmp = flash_addr;
217 ulong ltmp = end_addr;
218
219 flash_addr = flash_addr_new;
220 flash_addr_new = etmp;
221
222 end_addr = end_addr_new;
223 end_addr_new = ltmp;
224 }
225
226 rc = 0;
227Done:
228
229 /* try to re-protect */
230 (void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
231 (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
232
233 return rc;
234}
235#endif /* CMD_SAVEENV */
236
237#else /* ! CFG_ENV_ADDR_REDUND */
238
239int env_init(void)
240{
241 DECLARE_GLOBAL_DATA_PTR;
242
243 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
244 gd->env_addr = (ulong)&(env_ptr->data);
245 gd->env_valid = 1;
246 } else {
247 gd->env_addr = (ulong)&default_environment[0];
248 gd->env_valid = 0;
249 }
250
251 return (0);
252}
253
254#ifdef CMD_SAVEENV
255
256int saveenv(void)
257{
258 int len, rc;
259 ulong end_addr;
260 ulong flash_sect_addr;
261#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
262 ulong flash_offset;
263 uchar env_buffer[CFG_ENV_SECT_SIZE];
264#else
265 uchar *env_buffer = (char *)env_ptr;
266#endif /* CFG_ENV_SECT_SIZE */
267 int rcode = 0;
268
269#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
270
271 flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
272 flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
273
274 debug ( "copy old content: "
275 "sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
276 flash_sect_addr, (ulong)flash_addr, flash_offset);
277
278 /* copy old contents to temporary buffer */
279 memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
280
281 /* copy current environment to temporary buffer */
282 memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
283 env_ptr,
284 CFG_ENV_SIZE);
285
286 len = CFG_ENV_SECT_SIZE;
287#else
288 flash_sect_addr = (ulong)flash_addr;
289 len = CFG_ENV_SIZE;
290#endif /* CFG_ENV_SECT_SIZE */
291
292#ifndef CONFIG_INFERNO
293 end_addr = flash_sect_addr + len - 1;
294#else
295 /* this is the last sector, and the size is hardcoded here */
296 /* otherwise we will get stack problems on loading 128 KB environment */
297 end_addr = flash_sect_addr + 0x20000 - 1;
298#endif
299
300 debug ("Protect off %08lX ... %08lX\n",
301 (ulong)flash_sect_addr, end_addr);
302
303 if (flash_sect_protect (0, flash_sect_addr, end_addr))
304 return 1;
305
306 puts ("Erasing Flash...");
307 if (flash_sect_erase (flash_sect_addr, end_addr))
308 return 1;
309
310 puts ("Writing to Flash... ");
311 rc = flash_write(env_buffer, flash_sect_addr, len);
312 if (rc != 0) {
313 flash_perror (rc);
314 rcode = 1;
315 } else {
316 puts ("done\n");
317 }
318
319 /* try to re-protect */
320 (void) flash_sect_protect (1, flash_sect_addr, end_addr);
321 return rcode;
322}
323
324#endif /* CMD_SAVEENV */
325
326#endif /* CFG_ENV_ADDR_REDUND */
327
328void env_relocate_spec (void)
329{
330#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
331#ifdef CFG_ENV_ADDR_REDUND
332 DECLARE_GLOBAL_DATA_PTR;
333
334 if (gd->env_addr != (ulong)&(flash_addr->data))
335 {
336 env_t * etmp = flash_addr;
337 ulong ltmp = end_addr;
338
339 flash_addr = flash_addr_new;
340 flash_addr_new = etmp;
341
342 end_addr = end_addr_new;
343 end_addr_new = ltmp;
344 }
345
346 if (flash_addr_new->flags != obsolete_flag &&
347 crc32(0, flash_addr_new->data, ENV_SIZE) ==
348 flash_addr_new->crc)
349 {
350 gd->env_valid = 2;
351 flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
352 flash_write((char *)&obsolete_flag,
353 (ulong)&(flash_addr_new->flags),
354 sizeof(flash_addr_new->flags));
355 flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
356 }
357
358 if (flash_addr->flags != active_flag &&
359 (flash_addr->flags & active_flag) == active_flag)
360 {
361 gd->env_valid = 2;
362 flash_sect_protect (0, (ulong)flash_addr, end_addr);
363 flash_write((char *)&active_flag,
364 (ulong)&(flash_addr->flags),
365 sizeof(flash_addr->flags));
366 flash_sect_protect (1, (ulong)flash_addr, end_addr);
367 }
368
369 if (gd->env_valid == 2)
370 puts ("*** Warning - some problems detected "
371 "reading environment; recovered successfully\n\n");
372#endif /* CFG_ENV_ADDR_REDUND */
373 memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
374#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
375}
376
377#endif /* CFG_ENV_IS_IN_FLASH) */