2 * (C) Copyright 2010 DENX Software Engineering
3 * Wolfgang Denk <wd@denx.de>
5 * (C) Copyright 2005-2009 Samsung Electronics
6 * Kyungmin Park <kyungmin.park@samsung.com>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <environment.h>
30 #include <linux/stddef.h>
35 #include <linux/mtd/compat.h>
36 #include <linux/mtd/mtd.h>
37 #include <linux/mtd/onenand.h>
39 extern struct mtd_info onenand_mtd
;
40 extern struct onenand_chip onenand_chip
;
42 char *env_name_spec
= "OneNAND";
44 #define ONENAND_MAX_ENV_SIZE 4096
45 #define ONENAND_ENV_SIZE(mtd) (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
47 #ifdef ENV_IS_EMBEDDED
48 extern uchar environment
[];
49 #endif /* ENV_IS_EMBEDDED */
51 DECLARE_GLOBAL_DATA_PTR
;
53 uchar
env_get_char_spec(int index
)
55 return (*((uchar
*)(gd
->env_addr
+ index
)));
58 void env_relocate_spec(void)
60 struct mtd_info
*mtd
= &onenand_mtd
;
61 #ifdef CONFIG_ENV_ADDR_FLEX
62 struct onenand_chip
*this = &onenand_chip
;
66 #ifdef ENV_IS_EMBEDDED
67 char *buf
= (char *)&environment
[0];
69 loff_t env_addr
= CONFIG_ENV_ADDR
;
70 char onenand_env
[ONENAND_MAX_ENV_SIZE
];
71 char *buf
= (char *)&onenand_env
[0];
72 #endif /* ENV_IS_EMBEDDED */
74 #ifndef ENV_IS_EMBEDDED
75 # ifdef CONFIG_ENV_ADDR_FLEX
76 if (FLEXONENAND(this))
77 env_addr
= CONFIG_ENV_ADDR_FLEX
;
79 /* Check OneNAND exist */
81 /* Ignore read fail */
82 mtd
->read(mtd
, env_addr
, ONENAND_MAX_ENV_SIZE
,
83 &retlen
, (u_char
*)buf
);
85 mtd
->writesize
= MAX_ONENAND_PAGESIZE
;
86 #endif /* !ENV_IS_EMBEDDED */
88 rc
= env_import(buf
, 1);
98 struct mtd_info
*mtd
= &onenand_mtd
;
99 #ifdef CONFIG_ENV_ADDR_FLEX
100 struct onenand_chip
*this = &onenand_chip
;
102 loff_t env_addr
= CONFIG_ENV_ADDR
;
104 struct erase_info instr
= {
108 res
= (char *)&env_new
.data
;
109 len
= hexport_r(&env_htab
, '\0', &res
, ENV_SIZE
, 0, NULL
);
111 error("Cannot export environment: errno = %d\n", errno
);
114 env_new
.crc
= crc32(0, env_new
.data
, ENV_SIZE
);
116 instr
.len
= CONFIG_ENV_SIZE
;
117 #ifdef CONFIG_ENV_ADDR_FLEX
118 if (FLEXONENAND(this)) {
119 env_addr
= CONFIG_ENV_ADDR_FLEX
;
120 instr
.len
= CONFIG_ENV_SIZE_FLEX
;
121 instr
.len
<<= onenand_mtd
.eraseregions
[0].numblocks
== 1 ?
125 instr
.addr
= env_addr
;
127 if (mtd
->erase(mtd
, &instr
)) {
128 printf("OneNAND: erase failed at 0x%08llx\n", env_addr
);
132 if (mtd
->write(mtd
, env_addr
, ONENAND_MAX_ENV_SIZE
, &retlen
,
133 (u_char
*)&env_new
)) {
134 printf("OneNAND: write failed at 0x%llx\n", instr
.addr
);
144 gd
->env_addr
= (ulong
) & default_environment
[0];