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>
42 #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
44 #elif defined(CONFIG_ENV_OFFSET_REDUND)
45 #error Cannot use CONFIG_ENV_OFFSET_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
48 #if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
49 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
53 #error CONFIG_INFERNO not supported yet
56 #ifndef CONFIG_ENV_RANGE
57 #define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
60 int nand_legacy_rw (struct nand_chip* nand, int cmd,
61 size_t start, size_t len,
62 size_t * retlen, u_char * buf);
64 /* references to names in env_common.c */
65 extern uchar default_environment[];
66 extern int default_environment_size;
68 char * env_name_spec = "NAND";
71 #if defined(ENV_IS_EMBEDDED)
72 extern uchar environment[];
73 env_t *env_ptr = (env_t *)(&environment[0]);
74 #elif defined(CONFIG_NAND_ENV_DST)
75 env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
76 #else /* ! ENV_IS_EMBEDDED */
78 #endif /* ENV_IS_EMBEDDED */
82 #if !defined(ENV_IS_EMBEDDED)
83 static void use_default(void);
86 DECLARE_GLOBAL_DATA_PTR;
88 uchar env_get_char_spec (int index)
90 return ( *((uchar *)(gd->env_addr + index)) );
94 /* this is called before nand_init()
95 * so we can't read Nand to validate env data.
96 * Mark it OK for now. env_relocate() in env_common.c
97 * will call our relocate function which does the real
100 * When using a NAND boot image (like sequoia_nand), the environment
101 * can be embedded or attached to the U-Boot image in NAND flash. This way
102 * the SPL loads not only the U-Boot image from NAND but also the
107 #if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
108 int crc1_ok = 0, crc2_ok = 0;
111 #ifdef CONFIG_ENV_OFFSET_REDUND
114 tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
115 crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
120 crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
122 if (!crc1_ok && !crc2_ok) {
127 } else if (crc1_ok && !crc2_ok) {
130 #ifdef CONFIG_ENV_OFFSET_REDUND
131 else if (!crc1_ok && crc2_ok) {
134 /* both ok - check serial */
135 if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
137 else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
139 else if(tmp_env1->flags > tmp_env2->flags)
141 else if(tmp_env2->flags > tmp_env1->flags)
143 else /* flags are equal - almost impossible */
147 if (gd->env_valid == 2)
151 if (gd->env_valid == 1)
154 gd->env_addr = (ulong)env_ptr->data;
156 #else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
157 gd->env_addr = (ulong)&default_environment[0];
159 #endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
166 * The legacy NAND code saved the environment in the first NAND device i.e.,
167 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
169 int writeenv(size_t offset, u_char *buf)
171 size_t end = offset + CONFIG_ENV_RANGE;
172 size_t amount_saved = 0;
173 size_t blocksize, len;
177 blocksize = nand_info[0].erasesize;
178 len = min(blocksize, CONFIG_ENV_SIZE);
180 while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
181 if (nand_block_isbad(&nand_info[0], offset)) {
184 char_ptr = &buf[amount_saved];
185 if (nand_write(&nand_info[0], offset, &len,
192 if (amount_saved != CONFIG_ENV_SIZE)
197 #ifdef CONFIG_ENV_OFFSET_REDUND
201 nand_erase_options_t nand_erase_options;
205 nand_erase_options.length = CONFIG_ENV_RANGE;
206 nand_erase_options.quiet = 0;
207 nand_erase_options.jffs2 = 0;
208 nand_erase_options.scrub = 0;
210 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
212 if(gd->env_valid == 1) {
213 puts ("Erasing redundant Nand...\n");
214 nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
215 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
218 puts ("Writing to redundant Nand... ");
219 ret = writeenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
221 puts ("Erasing Nand...\n");
222 nand_erase_options.offset = CONFIG_ENV_OFFSET;
223 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
226 puts ("Writing to Nand... ");
227 ret = writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
235 gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
238 #else /* ! CONFIG_ENV_OFFSET_REDUND */
242 nand_erase_options_t nand_erase_options;
244 nand_erase_options.length = CONFIG_ENV_RANGE;
245 nand_erase_options.quiet = 0;
246 nand_erase_options.jffs2 = 0;
247 nand_erase_options.scrub = 0;
248 nand_erase_options.offset = CONFIG_ENV_OFFSET;
250 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
252 puts ("Erasing Nand...\n");
253 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
256 puts ("Writing to Nand... ");
257 if (writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr)) {
265 #endif /* CONFIG_ENV_OFFSET_REDUND */
266 #endif /* CMD_SAVEENV */
268 int readenv (size_t offset, u_char * buf)
270 size_t end = offset + CONFIG_ENV_RANGE;
271 size_t amount_loaded = 0;
272 size_t blocksize, len;
276 blocksize = nand_info[0].erasesize;
277 len = min(blocksize, CONFIG_ENV_SIZE);
279 while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
280 if (nand_block_isbad(&nand_info[0], offset)) {
283 char_ptr = &buf[amount_loaded];
284 if (nand_read(&nand_info[0], offset, &len, char_ptr))
287 amount_loaded += len;
290 if (amount_loaded != CONFIG_ENV_SIZE)
296 #ifdef CONFIG_ENV_OFFSET_REDUND
297 void env_relocate_spec (void)
299 #if !defined(ENV_IS_EMBEDDED)
300 int crc1_ok = 0, crc2_ok = 0;
301 env_t *tmp_env1, *tmp_env2;
303 tmp_env1 = (env_t *) malloc(CONFIG_ENV_SIZE);
304 tmp_env2 = (env_t *) malloc(CONFIG_ENV_SIZE);
306 if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
307 puts("No Valid Environment Area Found\n");
308 if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
309 puts("No Valid Reundant Environment Area Found\n");
311 crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
312 crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
314 if(!crc1_ok && !crc2_ok) {
317 return use_default();
318 } else if(crc1_ok && !crc2_ok)
320 else if(!crc1_ok && crc2_ok)
323 /* both ok - check serial */
324 if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
326 else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
328 else if(tmp_env1->flags > tmp_env2->flags)
330 else if(tmp_env2->flags > tmp_env1->flags)
332 else /* flags are equal - almost impossible */
338 if(gd->env_valid == 1) {
346 #endif /* ! ENV_IS_EMBEDDED */
348 #else /* ! CONFIG_ENV_OFFSET_REDUND */
350 * The legacy NAND code saved the environment in the first NAND device i.e.,
351 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
353 void env_relocate_spec (void)
355 #if !defined(ENV_IS_EMBEDDED)
358 ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
360 return use_default();
362 if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
363 return use_default();
364 #endif /* ! ENV_IS_EMBEDDED */
366 #endif /* CONFIG_ENV_OFFSET_REDUND */
368 #if !defined(ENV_IS_EMBEDDED)
369 static void use_default()
371 puts ("*** Warning - bad CRC or NAND, using default environment\n\n");