3 * Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
6 * Jian Zhang, Texas Instruments, jzhang@ti.com.
8 * (C) Copyright 2000-2006
9 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
11 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
12 * Andreas Heppel <aheppel@sysgo.de>
14 * See file CREDITS for list of people who contributed to this
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
37 #include <environment.h>
38 #include <linux/stddef.h>
41 #include <asm/errno.h>
43 #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
45 #elif defined(CONFIG_ENV_OFFSET_REDUND)
46 #error Cannot use CONFIG_ENV_OFFSET_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
49 #if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
50 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
53 #ifndef CONFIG_ENV_RANGE
54 #define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
57 /* references to names in env_common.c */
58 extern uchar default_environment[];
60 char * env_name_spec = "NAND";
63 #if defined(ENV_IS_EMBEDDED)
64 extern uchar environment[];
65 env_t *env_ptr = (env_t *)(&environment[0]);
66 #elif defined(CONFIG_NAND_ENV_DST)
67 env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
68 #else /* ! ENV_IS_EMBEDDED */
70 #endif /* ENV_IS_EMBEDDED */
74 #if !defined(ENV_IS_EMBEDDED)
75 static void use_default(void);
78 DECLARE_GLOBAL_DATA_PTR;
80 uchar env_get_char_spec (int index)
82 return ( *((uchar *)(gd->env_addr + index)) );
86 /* this is called before nand_init()
87 * so we can't read Nand to validate env data.
88 * Mark it OK for now. env_relocate() in env_common.c
89 * will call our relocate function which does the real
92 * When using a NAND boot image (like sequoia_nand), the environment
93 * can be embedded or attached to the U-Boot image in NAND flash. This way
94 * the SPL loads not only the U-Boot image from NAND but also the
99 #if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
100 int crc1_ok = 0, crc2_ok = 0;
103 #ifdef CONFIG_ENV_OFFSET_REDUND
106 tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
107 crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
112 crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
114 if (!crc1_ok && !crc2_ok) {
119 } else if (crc1_ok && !crc2_ok) {
122 #ifdef CONFIG_ENV_OFFSET_REDUND
123 else if (!crc1_ok && crc2_ok) {
126 /* both ok - check serial */
127 if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
129 else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
131 else if(tmp_env1->flags > tmp_env2->flags)
133 else if(tmp_env2->flags > tmp_env1->flags)
135 else /* flags are equal - almost impossible */
139 if (gd->env_valid == 2)
143 if (gd->env_valid == 1)
146 gd->env_addr = (ulong)env_ptr->data;
148 #else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
149 gd->env_addr = (ulong)&default_environment[0];
151 #endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
158 * The legacy NAND code saved the environment in the first NAND device i.e.,
159 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
161 int writeenv(size_t offset, u_char *buf)
163 size_t end = offset + CONFIG_ENV_RANGE;
164 size_t amount_saved = 0;
165 size_t blocksize, len;
169 blocksize = nand_info[0].erasesize;
170 len = min(blocksize, CONFIG_ENV_SIZE);
172 while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
173 if (nand_block_isbad(&nand_info[0], offset)) {
176 char_ptr = &buf[amount_saved];
177 if (nand_write(&nand_info[0], offset, &len,
184 if (amount_saved != CONFIG_ENV_SIZE)
189 #ifdef CONFIG_ENV_OFFSET_REDUND
193 nand_erase_options_t nand_erase_options;
197 nand_erase_options.length = CONFIG_ENV_RANGE;
198 nand_erase_options.quiet = 0;
199 nand_erase_options.jffs2 = 0;
200 nand_erase_options.scrub = 0;
202 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
204 if(gd->env_valid == 1) {
205 puts ("Erasing redundant Nand...\n");
206 nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
207 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
210 puts ("Writing to redundant Nand... ");
211 ret = writeenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
213 puts ("Erasing Nand...\n");
214 nand_erase_options.offset = CONFIG_ENV_OFFSET;
215 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
218 puts ("Writing to Nand... ");
219 ret = writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
227 gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
230 #else /* ! CONFIG_ENV_OFFSET_REDUND */
234 nand_erase_options_t nand_erase_options;
236 nand_erase_options.length = CONFIG_ENV_RANGE;
237 nand_erase_options.quiet = 0;
238 nand_erase_options.jffs2 = 0;
239 nand_erase_options.scrub = 0;
240 nand_erase_options.offset = CONFIG_ENV_OFFSET;
242 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
244 puts ("Erasing Nand...\n");
245 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
248 puts ("Writing to Nand... ");
249 if (writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr)) {
257 #endif /* CONFIG_ENV_OFFSET_REDUND */
258 #endif /* CMD_SAVEENV */
260 int readenv (size_t offset, u_char * buf)
262 size_t end = offset + CONFIG_ENV_RANGE;
263 size_t amount_loaded = 0;
264 size_t blocksize, len;
268 blocksize = nand_info[0].erasesize;
269 len = min(blocksize, CONFIG_ENV_SIZE);
271 while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
272 if (nand_block_isbad(&nand_info[0], offset)) {
275 char_ptr = &buf[amount_loaded];
276 if (nand_read(&nand_info[0], offset, &len, char_ptr))
279 amount_loaded += len;
282 if (amount_loaded != CONFIG_ENV_SIZE)
288 #ifdef CONFIG_ENV_OFFSET_OOB
289 int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
291 struct mtd_oob_ops ops;
292 uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
296 ops.mode = MTD_OOB_AUTO;
298 ops.ooblen = ENV_OFFSET_SIZE;
299 ops.oobbuf = (void *) oob_buf;
301 ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
304 if (oob_buf[0] == ENV_OOB_MARKER) {
305 *result = oob_buf[1] * nand->erasesize;
306 } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
307 *result = oob_buf[1];
309 printf("No dynamic environment marker in OOB block 0"
315 printf("error reading OOB block 0\n");
322 #ifdef CONFIG_ENV_OFFSET_REDUND
323 void env_relocate_spec (void)
325 #if !defined(ENV_IS_EMBEDDED)
326 int crc1_ok = 0, crc2_ok = 0;
327 env_t *tmp_env1, *tmp_env2;
329 tmp_env1 = (env_t *) malloc(CONFIG_ENV_SIZE);
330 tmp_env2 = (env_t *) malloc(CONFIG_ENV_SIZE);
332 if ((tmp_env1 == NULL) || (tmp_env2 == NULL)) {
333 puts("Can't allocate buffers for environment\n");
336 return use_default();
339 if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
340 puts("No Valid Environment Area Found\n");
341 if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
342 puts("No Valid Reundant Environment Area Found\n");
344 crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
345 crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
347 if(!crc1_ok && !crc2_ok) {
350 return use_default();
351 } else if(crc1_ok && !crc2_ok)
353 else if(!crc1_ok && crc2_ok)
356 /* both ok - check serial */
357 if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
359 else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
361 else if(tmp_env1->flags > tmp_env2->flags)
363 else if(tmp_env2->flags > tmp_env1->flags)
365 else /* flags are equal - almost impossible */
371 if(gd->env_valid == 1) {
379 #endif /* ! ENV_IS_EMBEDDED */
381 #else /* ! CONFIG_ENV_OFFSET_REDUND */
383 * The legacy NAND code saved the environment in the first NAND device i.e.,
384 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
386 void env_relocate_spec (void)
388 #if !defined(ENV_IS_EMBEDDED)
391 #if defined(CONFIG_ENV_OFFSET_OOB)
392 ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
393 /* If unable to read environment offset from NAND OOB then fall through
394 * to the normal environment reading code below
397 printf("Found Environment offset in OOB..\n");
399 return use_default();
402 ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
404 return use_default();
406 if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
407 return use_default();
408 #endif /* ! ENV_IS_EMBEDDED */
410 #endif /* CONFIG_ENV_OFFSET_REDUND */
412 #if !defined(ENV_IS_EMBEDDED)
413 static void use_default()
415 puts ("*** Warning - bad CRC or NAND, using default environment\n\n");