8 * (C) Copyright 2000-2006
11 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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 #ifdef ENV_IS_EMBEDDED
72 extern uchar environment[];
73 env_t *env_ptr = (env_t *)(&environment[0]);
74 #else /* ! ENV_IS_EMBEDDED */
76 #endif /* ENV_IS_EMBEDDED */
80 #if !defined(ENV_IS_EMBEDDED)
81 static void use_default(void);
84 DECLARE_GLOBAL_DATA_PTR;
86 uchar env_get_char_spec (int index)
88 return ( *((uchar *)(gd->env_addr + index)) );
92 /* this is called before nand_init()
93 * so we can't read Nand to validate env data.
94 * Mark it OK for now. env_relocate() in env_common.c
95 * will call our relocate function which does the real
98 * When using a NAND boot image (like sequoia_nand), the environment
99 * can be embedded or attached to the U-Boot image in NAND flash. This way
100 * the SPL loads not only the U-Boot image from NAND but also the
105 #if defined(ENV_IS_EMBEDDED)
106 int crc1_ok = 0, crc2_ok = 0;
107 env_t *tmp_env1, *tmp_env2;
110 tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
112 crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
113 crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
115 if (!crc1_ok && !crc2_ok)
117 else if(crc1_ok && !crc2_ok)
119 else if(!crc1_ok && crc2_ok)
122 /* both ok - check serial */
123 if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
125 else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
127 else if(tmp_env1->flags > tmp_env2->flags)
129 else if(tmp_env2->flags > tmp_env1->flags)
131 else /* flags are equal - almost impossible */
135 if (gd->env_valid == 1)
137 else if (gd->env_valid == 2)
139 #else /* ENV_IS_EMBEDDED */
140 gd->env_addr = (ulong)&default_environment[0];
142 #endif /* ENV_IS_EMBEDDED */
149 * The legacy NAND code saved the environment in the first NAND device i.e.,
150 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
152 int writeenv(size_t offset, u_char *buf)
154 size_t end = offset + CONFIG_ENV_RANGE;
155 size_t amount_saved = 0;
156 size_t blocksize, len;
160 blocksize = nand_info[0].erasesize;
161 len = min(blocksize, CONFIG_ENV_SIZE);
163 while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
164 if (nand_block_isbad(&nand_info[0], offset)) {
167 char_ptr = &buf[amount_saved];
168 if (nand_write(&nand_info[0], offset, &len,
175 if (amount_saved != CONFIG_ENV_SIZE)
180 #ifdef CONFIG_ENV_OFFSET_REDUND
184 nand_erase_options_t nand_erase_options;
188 nand_erase_options.length = CONFIG_ENV_RANGE;
189 nand_erase_options.quiet = 0;
190 nand_erase_options.jffs2 = 0;
191 nand_erase_options.scrub = 0;
193 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
195 if(gd->env_valid == 1) {
196 puts ("Erasing redundant Nand...\n");
197 nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
198 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
201 puts ("Writing to redundant Nand... ");
202 ret = writeenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
204 puts ("Erasing Nand...\n");
205 nand_erase_options.offset = CONFIG_ENV_OFFSET;
206 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
209 puts ("Writing to Nand... ");
210 ret = writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
218 gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
221 #else /* ! CONFIG_ENV_OFFSET_REDUND */
225 nand_erase_options_t nand_erase_options;
227 nand_erase_options.length = CONFIG_ENV_RANGE;
228 nand_erase_options.quiet = 0;
229 nand_erase_options.jffs2 = 0;
230 nand_erase_options.scrub = 0;
231 nand_erase_options.offset = CONFIG_ENV_OFFSET;
233 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
235 puts ("Erasing Nand...\n");
236 if (nand_erase_opts(&nand_info[0], &nand_erase_options))
239 puts ("Writing to Nand... ");
240 if (writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr)) {
248 #endif /* CONFIG_ENV_OFFSET_REDUND */
249 #endif /* CMD_SAVEENV */
251 int readenv (size_t offset, u_char * buf)
253 size_t end = offset + CONFIG_ENV_RANGE;
254 size_t amount_loaded = 0;
255 size_t blocksize, len;
259 blocksize = nand_info[0].erasesize;
260 len = min(blocksize, CONFIG_ENV_SIZE);
262 while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
263 if (nand_block_isbad(&nand_info[0], offset)) {
266 char_ptr = &buf[amount_loaded];
267 if (nand_read(&nand_info[0], offset, &len, char_ptr))
270 amount_loaded += len;
273 if (amount_loaded != CONFIG_ENV_SIZE)
279 #ifdef CONFIG_ENV_OFFSET_REDUND
280 void env_relocate_spec (void)
282 #if !defined(ENV_IS_EMBEDDED)
283 int crc1_ok = 0, crc2_ok = 0;
284 env_t *tmp_env1, *tmp_env2;
286 tmp_env1 = (env_t *) malloc(CONFIG_ENV_SIZE);
287 tmp_env2 = (env_t *) malloc(CONFIG_ENV_SIZE);
289 if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
290 puts("No Valid Environment Area Found\n");
291 if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
292 puts("No Valid Reundant Environment Area Found\n");
294 crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
295 crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
297 if(!crc1_ok && !crc2_ok) {
300 return use_default();
301 } else if(crc1_ok && !crc2_ok)
303 else if(!crc1_ok && crc2_ok)
306 /* both ok - check serial */
307 if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
309 else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
311 else if(tmp_env1->flags > tmp_env2->flags)
313 else if(tmp_env2->flags > tmp_env1->flags)
315 else /* flags are equal - almost impossible */
321 if(gd->env_valid == 1) {
329 #endif /* ! ENV_IS_EMBEDDED */
331 #else /* ! CONFIG_ENV_OFFSET_REDUND */
333 * The legacy NAND code saved the environment in the first NAND device i.e.,
334 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
336 void env_relocate_spec (void)
338 #if !defined(ENV_IS_EMBEDDED)
341 ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
343 return use_default();
345 if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
346 return use_default();
347 #endif /* ! ENV_IS_EMBEDDED */
349 #endif /* CONFIG_ENV_OFFSET_REDUND */
351 #if !defined(ENV_IS_EMBEDDED)
352 static void use_default()
354 puts ("*** Warning - bad CRC or NAND, using default environment\n\n");