3 * Jian Zhang, Texas Instruments, jzhang@ti.com.
5 * (C) Copyright 2000-2006
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
9 * Andreas Heppel <aheppel@sysgo.de>
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */
37 #include <environment.h>
38 #include <linux/stddef.h>
42 #if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)
44 #elif defined(CFG_ENV_OFFSET_REDUND)
45 #error Cannot use CFG_ENV_OFFSET_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_NAND
48 #if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND != CFG_ENV_SIZE)
49 #error CFG_ENV_SIZE_REDUND should be the same as CFG_ENV_SIZE
53 #error CONFIG_INFERNO not supported yet
56 int nand_legacy_rw (struct nand_chip
* nand
, int cmd
,
57 size_t start
, size_t len
,
58 size_t * retlen
, u_char
* buf
);
60 /* info for NAND chips, defined in drivers/mtd/nand/nand.c */
61 extern nand_info_t nand_info
[];
63 /* references to names in env_common.c */
64 extern uchar default_environment
[];
65 extern int default_environment_size
;
67 char * env_name_spec
= "NAND";
70 #ifdef ENV_IS_EMBEDDED
71 extern uchar environment
[];
72 env_t
*env_ptr
= (env_t
*)(&environment
[0]);
73 #else /* ! ENV_IS_EMBEDDED */
75 #endif /* ENV_IS_EMBEDDED */
79 #if !defined(ENV_IS_EMBEDDED)
80 static void use_default(void);
83 DECLARE_GLOBAL_DATA_PTR
;
85 uchar
env_get_char_spec (int index
)
87 return ( *((uchar
*)(gd
->env_addr
+ index
)) );
91 /* this is called before nand_init()
92 * so we can't read Nand to validate env data.
93 * Mark it OK for now. env_relocate() in env_common.c
94 * will call our relocate function which will does
95 * the real validation.
97 * When using a NAND boot image (like sequoia_nand), the environment
98 * can be embedded or attached to the U-Boot image in NAND flash. This way
99 * the SPL loads not only the U-Boot image from NAND but also the
104 #if defined(ENV_IS_EMBEDDED)
106 int crc1_ok
= 0, crc2_ok
= 0;
107 env_t
*tmp_env1
, *tmp_env2
;
109 total
= CFG_ENV_SIZE
;
112 tmp_env2
= (env_t
*)((ulong
)env_ptr
+ CFG_ENV_SIZE
);
114 crc1_ok
= (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
115 crc2_ok
= (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
117 if (!crc1_ok
&& !crc2_ok
)
119 else if(crc1_ok
&& !crc2_ok
)
121 else if(!crc1_ok
&& crc2_ok
)
124 /* both ok - check serial */
125 if(tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
127 else if(tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
129 else if(tmp_env1
->flags
> tmp_env2
->flags
)
131 else if(tmp_env2
->flags
> tmp_env1
->flags
)
133 else /* flags are equal - almost impossible */
137 if (gd
->env_valid
== 1)
139 else if (gd
->env_valid
== 2)
141 #else /* ENV_IS_EMBEDDED */
142 gd
->env_addr
= (ulong
)&default_environment
[0];
144 #endif /* ENV_IS_EMBEDDED */
151 * The legacy NAND code saved the environment in the first NAND device i.e.,
152 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
154 #ifdef CFG_ENV_OFFSET_REDUND
161 total
= CFG_ENV_SIZE
;
163 if(gd
->env_valid
== 1) {
164 puts ("Erasing redundant Nand...");
165 if (nand_erase(&nand_info
[0],
166 CFG_ENV_OFFSET_REDUND
, CFG_ENV_SIZE
))
168 puts ("Writing to redundant Nand... ");
169 ret
= nand_write(&nand_info
[0], CFG_ENV_OFFSET_REDUND
, &total
,
172 puts ("Erasing Nand...");
173 if (nand_erase(&nand_info
[0],
174 CFG_ENV_OFFSET
, CFG_ENV_SIZE
))
177 puts ("Writing to Nand... ");
178 ret
= nand_write(&nand_info
[0], CFG_ENV_OFFSET
, &total
,
181 if (ret
|| total
!= CFG_ENV_SIZE
)
185 gd
->env_valid
= (gd
->env_valid
== 2 ? 1 : 2);
188 #else /* ! CFG_ENV_OFFSET_REDUND */
194 puts ("Erasing Nand...");
195 if (nand_erase(&nand_info
[0], CFG_ENV_OFFSET
, CFG_ENV_SIZE
))
198 puts ("Writing to Nand... ");
199 total
= CFG_ENV_SIZE
;
200 ret
= nand_write(&nand_info
[0], CFG_ENV_OFFSET
, &total
, (u_char
*)env_ptr
);
201 if (ret
|| total
!= CFG_ENV_SIZE
)
207 #endif /* CFG_ENV_OFFSET_REDUND */
208 #endif /* CMD_SAVEENV */
210 #ifdef CFG_ENV_OFFSET_REDUND
211 void env_relocate_spec (void)
213 #if !defined(ENV_IS_EMBEDDED)
215 int crc1_ok
= 0, crc2_ok
= 0;
216 env_t
*tmp_env1
, *tmp_env2
;
218 total
= CFG_ENV_SIZE
;
220 tmp_env1
= (env_t
*) malloc(CFG_ENV_SIZE
);
221 tmp_env2
= (env_t
*) malloc(CFG_ENV_SIZE
);
223 nand_read(&nand_info
[0], CFG_ENV_OFFSET
, &total
,
225 nand_read(&nand_info
[0], CFG_ENV_OFFSET_REDUND
, &total
,
228 crc1_ok
= (crc32(0, tmp_env1
->data
, ENV_SIZE
) == tmp_env1
->crc
);
229 crc2_ok
= (crc32(0, tmp_env2
->data
, ENV_SIZE
) == tmp_env2
->crc
);
231 if(!crc1_ok
&& !crc2_ok
)
232 return use_default();
233 else if(crc1_ok
&& !crc2_ok
)
235 else if(!crc1_ok
&& crc2_ok
)
238 /* both ok - check serial */
239 if(tmp_env1
->flags
== 255 && tmp_env2
->flags
== 0)
241 else if(tmp_env2
->flags
== 255 && tmp_env1
->flags
== 0)
243 else if(tmp_env1
->flags
> tmp_env2
->flags
)
245 else if(tmp_env2
->flags
> tmp_env1
->flags
)
247 else /* flags are equal - almost impossible */
253 if(gd
->env_valid
== 1) {
261 #endif /* ! ENV_IS_EMBEDDED */
263 #else /* ! CFG_ENV_OFFSET_REDUND */
265 * The legacy NAND code saved the environment in the first NAND device i.e.,
266 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
268 void env_relocate_spec (void)
270 #if !defined(ENV_IS_EMBEDDED)
274 #if defined(CFG_ENV_OFFSET_OOB)
275 struct mtd_info
*mtd
= &nand_info
[0];
276 struct nand_chip
*this = mtd
->priv
;
280 buf_len
= (1 << this->bbt_erase_shift
);
281 buf_len
+= (buf_len
>> this->page_shift
) * mtd
->oobsize
;
282 buf
= malloc(buf_len
);
286 nand_read_raw(mtd
, buf
, 0, mtd
->oobblock
, mtd
->oobsize
);
287 if (buf
[mtd
->oobblock
+ 8 + 0] == 'E' &&
288 buf
[mtd
->oobblock
+ 8 + 1] == 'N' &&
289 buf
[mtd
->oobblock
+ 8 + 2] == 'V' &&
290 buf
[mtd
->oobblock
+ 8 + 3] == '0') {
291 CFG_ENV_OFFSET
= *((unsigned long *) &buf
[mtd
->oobblock
+ 8 + 4]);
292 /* fall through to the normal environment reading code below */
294 puts("Found Environment offset in OOB..\n");
297 return use_default();
301 total
= CFG_ENV_SIZE
;
302 ret
= nand_read(&nand_info
[0], CFG_ENV_OFFSET
, &total
, (u_char
*)env_ptr
);
303 if (ret
|| total
!= CFG_ENV_SIZE
)
304 return use_default();
306 if (crc32(0, env_ptr
->data
, ENV_SIZE
) != env_ptr
->crc
)
307 return use_default();
308 #endif /* ! ENV_IS_EMBEDDED */
310 #endif /* CFG_ENV_OFFSET_REDUND */
312 #if !defined(ENV_IS_EMBEDDED)
313 static void use_default()
315 puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
320 #endif /* CFG_ENV_IS_IN_NAND */