2 * (C) Copyright 2005-2007 Samsung Electronics
3 * Kyungmin Park <kyungmin.park@samsung.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #if defined(CFG_ENV_IS_IN_ONENAND) /* Environment is in OneNAND */
29 #include <environment.h>
30 #include <linux/stddef.h>
33 #include <linux/mtd/compat.h>
34 #include <linux/mtd/mtd.h>
35 #include <linux/mtd/onenand.h>
37 extern struct mtd_info onenand_mtd
;
38 extern struct onenand_chip onenand_chip
;
40 /* References to names in env_common.c */
41 extern uchar default_environment
[];
43 #define ONENAND_ENV_SIZE(mtd) (mtd.oobblock - ENV_HEADER_SIZE)
45 char *env_name_spec
= "OneNAND";
47 #ifdef ENV_IS_EMBEDDED
48 extern uchar environment
[];
49 env_t
*env_ptr
= (env_t
*) (&environment
[0]);
50 #else /* ! ENV_IS_EMBEDDED */
51 static unsigned char onenand_env
[MAX_ONENAND_PAGESIZE
];
52 env_t
*env_ptr
= (env_t
*) onenand_env
;
53 #endif /* ENV_IS_EMBEDDED */
55 DECLARE_GLOBAL_DATA_PTR
;
57 uchar
env_get_char_spec(int index
)
59 return (*((uchar
*) (gd
->env_addr
+ index
)));
62 void env_relocate_spec(void)
64 unsigned long env_addr
;
68 env_addr
= CFG_ENV_ADDR
;
69 env_addr
-= (unsigned long) onenand_chip
.base
;
71 /* Check OneNAND exist */
72 if (onenand_mtd
.oobblock
)
73 /* Ignore read fail */
74 onenand_read(&onenand_mtd
, env_addr
, onenand_mtd
.oobblock
,
75 &retlen
, (u_char
*) env_ptr
);
77 onenand_mtd
.oobblock
= MAX_ONENAND_PAGESIZE
;
79 if (crc32(0, env_ptr
->data
, ONENAND_ENV_SIZE(onenand_mtd
)) !=
84 memcpy(env_ptr
->data
, default_environment
,
85 ONENAND_ENV_SIZE(onenand_mtd
));
87 crc32(0, env_ptr
->data
, ONENAND_ENV_SIZE(onenand_mtd
));
90 gd
->env_addr
= (ulong
) & env_ptr
->data
;
96 unsigned long env_addr
= CFG_ENV_ADDR
;
97 struct erase_info instr
= {
102 instr
.len
= CFG_ENV_SIZE
;
103 instr
.addr
= env_addr
;
104 instr
.addr
-= (unsigned long)onenand_chip
.base
;
105 if (onenand_erase(&onenand_mtd
, &instr
)) {
106 printf("OneNAND: erase failed at 0x%08x\n", env_addr
);
112 crc32(0, env_ptr
->data
, ONENAND_ENV_SIZE(onenand_mtd
));
114 env_addr
-= (unsigned long)onenand_chip
.base
;
115 if (onenand_write(&onenand_mtd
, env_addr
, onenand_mtd
.oobblock
, &retlen
,
116 (u_char
*) env_ptr
)) {
117 printf("OneNAND: write failed at 0x%08x\n", instr
.addr
);
127 gd
->env_addr
= (ulong
) & default_environment
[0];
133 #endif /* CFG_ENV_IS_IN_ONENAND */