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 /* references to names in env_common.c */
61 extern uchar default_environment
[];
63 char * env_name_spec
= "NAND";
66 #if defined(ENV_IS_EMBEDDED)
67 extern uchar environment
[];
68 env_t
*env_ptr
= (env_t
*)(&environment
[0]);
69 #elif defined(CONFIG_NAND_ENV_DST)
70 env_t
*env_ptr
= (env_t
*)CONFIG_NAND_ENV_DST
;
71 #else /* ! ENV_IS_EMBEDDED */
73 #endif /* ENV_IS_EMBEDDED */
77 #if !defined(ENV_IS_EMBEDDED)
78 static void use_default(void);
81 DECLARE_GLOBAL_DATA_PTR
;
83 uchar
env_get_char_spec (int index
)
85 return ( *((uchar
*)(gd
->env_addr
+ index
)) );
89 /* this is called before nand_init()
90 * so we can't read Nand to validate env data.
91 * Mark it OK for now. env_relocate() in env_common.c
92 * will call our relocate function which does the real
95 * When using a NAND boot image (like sequoia_nand), the environment
96 * can be embedded or attached to the U-Boot image in NAND flash. This way
97 * the SPL loads not only the U-Boot image from NAND but also the
102 #if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
103 int crc1_ok
= 0, crc2_ok
= 0;
106 #ifdef CONFIG_ENV_OFFSET_REDUND
109 tmp_env2
= (env_t
*)((ulong
)env_ptr
+ CONFIG_ENV_SIZE
);
110 crc2_ok
= (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
115 crc1_ok
= (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
117 if (!crc1_ok
&& !crc2_ok
) {
122 } else if (crc1_ok
&& !crc2_ok
) {
125 #ifdef CONFIG_ENV_OFFSET_REDUND
126 else if (!crc1_ok
&& crc2_ok
) {
129 /* both ok - check serial */
130 if(tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
132 else if(tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
134 else if(tmp_env1
->flags
> tmp_env2
->flags
)
136 else if(tmp_env2
->flags
> tmp_env1
->flags
)
138 else /* flags are equal - almost impossible */
142 if (gd
->env_valid
== 2)
146 if (gd
->env_valid
== 1)
149 gd
->env_addr
= (ulong
)env_ptr
->data
;
151 #else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
152 gd
->env_addr
= (ulong
)&default_environment
[0];
154 #endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
161 * The legacy NAND code saved the environment in the first NAND device i.e.,
162 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
164 int writeenv(size_t offset
, u_char
*buf
)
166 size_t end
= offset
+ CONFIG_ENV_RANGE
;
167 size_t amount_saved
= 0;
168 size_t blocksize
, len
;
172 blocksize
= nand_info
[0].erasesize
;
173 len
= min(blocksize
, CONFIG_ENV_SIZE
);
175 while (amount_saved
< CONFIG_ENV_SIZE
&& offset
< end
) {
176 if (nand_block_isbad(&nand_info
[0], offset
)) {
179 char_ptr
= &buf
[amount_saved
];
180 if (nand_write(&nand_info
[0], offset
, &len
,
187 if (amount_saved
!= CONFIG_ENV_SIZE
)
192 #ifdef CONFIG_ENV_OFFSET_REDUND
196 nand_erase_options_t nand_erase_options
;
200 nand_erase_options
.length
= CONFIG_ENV_RANGE
;
201 nand_erase_options
.quiet
= 0;
202 nand_erase_options
.jffs2
= 0;
203 nand_erase_options
.scrub
= 0;
205 if (CONFIG_ENV_RANGE
< CONFIG_ENV_SIZE
)
207 if(gd
->env_valid
== 1) {
208 puts ("Erasing redundant Nand...\n");
209 nand_erase_options
.offset
= CONFIG_ENV_OFFSET_REDUND
;
210 if (nand_erase_opts(&nand_info
[0], &nand_erase_options
))
213 puts ("Writing to redundant Nand... ");
214 ret
= writeenv(CONFIG_ENV_OFFSET_REDUND
, (u_char
*) env_ptr
);
216 puts ("Erasing Nand...\n");
217 nand_erase_options
.offset
= CONFIG_ENV_OFFSET
;
218 if (nand_erase_opts(&nand_info
[0], &nand_erase_options
))
221 puts ("Writing to Nand... ");
222 ret
= writeenv(CONFIG_ENV_OFFSET
, (u_char
*) env_ptr
);
230 gd
->env_valid
= (gd
->env_valid
== 2 ? 1 : 2);
233 #else /* ! CONFIG_ENV_OFFSET_REDUND */
237 nand_erase_options_t nand_erase_options
;
239 nand_erase_options
.length
= CONFIG_ENV_RANGE
;
240 nand_erase_options
.quiet
= 0;
241 nand_erase_options
.jffs2
= 0;
242 nand_erase_options
.scrub
= 0;
243 nand_erase_options
.offset
= CONFIG_ENV_OFFSET
;
245 if (CONFIG_ENV_RANGE
< CONFIG_ENV_SIZE
)
247 puts ("Erasing Nand...\n");
248 if (nand_erase_opts(&nand_info
[0], &nand_erase_options
))
251 puts ("Writing to Nand... ");
252 if (writeenv(CONFIG_ENV_OFFSET
, (u_char
*) env_ptr
)) {
260 #endif /* CONFIG_ENV_OFFSET_REDUND */
261 #endif /* CMD_SAVEENV */
263 int readenv (size_t offset
, u_char
* buf
)
265 size_t end
= offset
+ CONFIG_ENV_RANGE
;
266 size_t amount_loaded
= 0;
267 size_t blocksize
, len
;
271 blocksize
= nand_info
[0].erasesize
;
272 len
= min(blocksize
, CONFIG_ENV_SIZE
);
274 while (amount_loaded
< CONFIG_ENV_SIZE
&& offset
< end
) {
275 if (nand_block_isbad(&nand_info
[0], offset
)) {
278 char_ptr
= &buf
[amount_loaded
];
279 if (nand_read(&nand_info
[0], offset
, &len
, char_ptr
))
282 amount_loaded
+= len
;
285 if (amount_loaded
!= CONFIG_ENV_SIZE
)
291 #ifdef CONFIG_ENV_OFFSET_REDUND
292 void env_relocate_spec (void)
294 #if !defined(ENV_IS_EMBEDDED)
295 int crc1_ok
= 0, crc2_ok
= 0;
296 env_t
*tmp_env1
, *tmp_env2
;
298 tmp_env1
= (env_t
*) malloc(CONFIG_ENV_SIZE
);
299 tmp_env2
= (env_t
*) malloc(CONFIG_ENV_SIZE
);
301 if ((tmp_env1
== NULL
) || (tmp_env2
== NULL
)) {
302 puts("Can't allocate buffers for environment\n");
305 return use_default();
308 if (readenv(CONFIG_ENV_OFFSET
, (u_char
*) tmp_env1
))
309 puts("No Valid Environment Area Found\n");
310 if (readenv(CONFIG_ENV_OFFSET_REDUND
, (u_char
*) tmp_env2
))
311 puts("No Valid Reundant Environment Area Found\n");
313 crc1_ok
= (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
314 crc2_ok
= (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
316 if(!crc1_ok
&& !crc2_ok
) {
319 return use_default();
320 } else if(crc1_ok
&& !crc2_ok
)
322 else if(!crc1_ok
&& crc2_ok
)
325 /* both ok - check serial */
326 if(tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
328 else if(tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
330 else if(tmp_env1
->flags
> tmp_env2
->flags
)
332 else if(tmp_env2
->flags
> tmp_env1
->flags
)
334 else /* flags are equal - almost impossible */
340 if(gd
->env_valid
== 1) {
348 #endif /* ! ENV_IS_EMBEDDED */
350 #else /* ! CONFIG_ENV_OFFSET_REDUND */
352 * The legacy NAND code saved the environment in the first NAND device i.e.,
353 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
355 void env_relocate_spec (void)
357 #if !defined(ENV_IS_EMBEDDED)
360 ret
= readenv(CONFIG_ENV_OFFSET
, (u_char
*) env_ptr
);
362 return use_default();
364 if (crc32(0, env_ptr
->data
, ENV_SIZE
) != env_ptr
->crc
)
365 return use_default();
366 #endif /* ! ENV_IS_EMBEDDED */
368 #endif /* CONFIG_ENV_OFFSET_REDUND */
370 #if !defined(ENV_IS_EMBEDDED)
371 static void use_default()
373 puts ("*** Warning - bad CRC or NAND, using default environment\n\n");