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d7e8ce10 | 1 | /* |
937076f8 | 2 | * (C) Copyright 2005-2009 Samsung Electronics |
d7e8ce10 KP |
3 | * Kyungmin Park <kyungmin.park@samsung.com> |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
d7e8ce10 KP |
25 | #include <command.h> |
26 | #include <environment.h> | |
27 | #include <linux/stddef.h> | |
28 | #include <malloc.h> | |
29 | ||
30 | #include <linux/mtd/compat.h> | |
31 | #include <linux/mtd/mtd.h> | |
32 | #include <linux/mtd/onenand.h> | |
33 | ||
34 | extern struct mtd_info onenand_mtd; | |
35 | extern struct onenand_chip onenand_chip; | |
36 | ||
37 | /* References to names in env_common.c */ | |
38 | extern uchar default_environment[]; | |
39 | ||
d7e8ce10 KP |
40 | char *env_name_spec = "OneNAND"; |
41 | ||
937076f8 KP |
42 | #define ONENAND_MAX_ENV_SIZE 4096 |
43 | #define ONENAND_ENV_SIZE(mtd) (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE) | |
44 | ||
d7e8ce10 KP |
45 | #ifdef ENV_IS_EMBEDDED |
46 | extern uchar environment[]; | |
47 | env_t *env_ptr = (env_t *) (&environment[0]); | |
48 | #else /* ! ENV_IS_EMBEDDED */ | |
937076f8 | 49 | static unsigned char onenand_env[ONENAND_MAX_ENV_SIZE]; |
d7e8ce10 KP |
50 | env_t *env_ptr = (env_t *) onenand_env; |
51 | #endif /* ENV_IS_EMBEDDED */ | |
52 | ||
a9da2b41 KP |
53 | DECLARE_GLOBAL_DATA_PTR; |
54 | ||
d7e8ce10 KP |
55 | uchar env_get_char_spec(int index) |
56 | { | |
d7e8ce10 KP |
57 | return (*((uchar *) (gd->env_addr + index))); |
58 | } | |
59 | ||
60 | void env_relocate_spec(void) | |
61 | { | |
937076f8 | 62 | struct mtd_info *mtd = &onenand_mtd; |
2e8a6f55 | 63 | loff_t env_addr; |
d7e8ce10 | 64 | int use_default = 0; |
2ae64f51 | 65 | size_t retlen; |
d7e8ce10 | 66 | |
0e8d1586 | 67 | env_addr = CONFIG_ENV_ADDR; |
d7e8ce10 KP |
68 | |
69 | /* Check OneNAND exist */ | |
937076f8 | 70 | if (mtd->writesize) |
d7e8ce10 | 71 | /* Ignore read fail */ |
937076f8 | 72 | mtd->read(mtd, env_addr, ONENAND_MAX_ENV_SIZE, |
d7e8ce10 KP |
73 | &retlen, (u_char *) env_ptr); |
74 | else | |
937076f8 | 75 | mtd->writesize = MAX_ONENAND_PAGESIZE; |
d7e8ce10 | 76 | |
937076f8 | 77 | if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)) != env_ptr->crc) |
d7e8ce10 KP |
78 | use_default = 1; |
79 | ||
80 | if (use_default) { | |
81 | memcpy(env_ptr->data, default_environment, | |
937076f8 | 82 | ONENAND_ENV_SIZE(mtd)); |
d7e8ce10 | 83 | env_ptr->crc = |
937076f8 | 84 | crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)); |
d7e8ce10 KP |
85 | } |
86 | ||
87 | gd->env_addr = (ulong) & env_ptr->data; | |
88 | gd->env_valid = 1; | |
89 | } | |
90 | ||
91 | int saveenv(void) | |
92 | { | |
937076f8 KP |
93 | struct mtd_info *mtd = &onenand_mtd; |
94 | loff_t env_addr = CONFIG_ENV_ADDR; | |
a9da2b41 KP |
95 | struct erase_info instr = { |
96 | .callback = NULL, | |
97 | }; | |
2ae64f51 | 98 | size_t retlen; |
d7e8ce10 | 99 | |
0e8d1586 | 100 | instr.len = CONFIG_ENV_SIZE; |
d7e8ce10 | 101 | instr.addr = env_addr; |
937076f8 KP |
102 | instr.mtd = mtd; |
103 | if (mtd->erase(mtd, &instr)) { | |
0a5676be | 104 | printf("OneNAND: erase failed at 0x%08lx\n", env_addr); |
d7e8ce10 KP |
105 | return 1; |
106 | } | |
107 | ||
108 | /* update crc */ | |
937076f8 | 109 | env_ptr->crc = crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)); |
d7e8ce10 | 110 | |
937076f8 | 111 | if (mtd->write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen, |
d7e8ce10 | 112 | (u_char *) env_ptr)) { |
8d2effea | 113 | printf("OneNAND: write failed at 0x%llx\n", instr.addr); |
d7e8ce10 KP |
114 | return 2; |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | int env_init(void) | |
121 | { | |
d7e8ce10 KP |
122 | /* use default */ |
123 | gd->env_addr = (ulong) & default_environment[0]; | |
124 | gd->env_valid = 1; | |
125 | ||
126 | return 0; | |
127 | } |