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Kyungmin Parkd7e8ce12007-09-10 17:15:14 +09001/*
2 * (C) Copyright 2005-2007 Samsung Electronics
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>
25
26#if defined(CFG_ENV_IS_IN_ONENAND) /* Environment is in OneNAND */
27
28#include <command.h>
29#include <environment.h>
30#include <linux/stddef.h>
31#include <malloc.h>
32
33#include <linux/mtd/compat.h>
34#include <linux/mtd/mtd.h>
35#include <linux/mtd/onenand.h>
36
37extern struct mtd_info onenand_mtd;
38extern struct onenand_chip onenand_chip;
39
40/* References to names in env_common.c */
41extern uchar default_environment[];
42
43#define ONENAND_ENV_SIZE(mtd) (mtd.oobblock - ENV_HEADER_SIZE)
44
45char *env_name_spec = "OneNAND";
46
47#ifdef ENV_IS_EMBEDDED
48extern uchar environment[];
49env_t *env_ptr = (env_t *) (&environment[0]);
50#else /* ! ENV_IS_EMBEDDED */
51static unsigned char onenand_env[MAX_ONENAND_PAGESIZE];
52env_t *env_ptr = (env_t *) onenand_env;
53#endif /* ENV_IS_EMBEDDED */
54
Kyungmin Parka9da2b42008-03-31 10:40:19 +090055DECLARE_GLOBAL_DATA_PTR;
56
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +090057uchar env_get_char_spec(int index)
58{
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +090059 return (*((uchar *) (gd->env_addr + index)));
60}
61
62void env_relocate_spec(void)
63{
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +090064 unsigned long env_addr;
65 int use_default = 0;
Peter Pearse2ae64f52007-11-15 08:58:00 +000066 size_t retlen;
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +090067
68 env_addr = CFG_ENV_ADDR;
Kyungmin Parka9da2b42008-03-31 10:40:19 +090069 env_addr -= (unsigned long) onenand_chip.base;
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +090070
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);
76 else
77 onenand_mtd.oobblock = MAX_ONENAND_PAGESIZE;
78
79 if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd)) !=
80 env_ptr->crc)
81 use_default = 1;
82
83 if (use_default) {
84 memcpy(env_ptr->data, default_environment,
85 ONENAND_ENV_SIZE(onenand_mtd));
86 env_ptr->crc =
87 crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd));
88 }
89
90 gd->env_addr = (ulong) & env_ptr->data;
91 gd->env_valid = 1;
92}
93
94int saveenv(void)
95{
96 unsigned long env_addr = CFG_ENV_ADDR;
Kyungmin Parka9da2b42008-03-31 10:40:19 +090097 struct erase_info instr = {
98 .callback = NULL,
99 };
Peter Pearse2ae64f52007-11-15 08:58:00 +0000100 size_t retlen;
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +0900101
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);
107 return 1;
108 }
109
110 /* update crc */
111 env_ptr->crc =
Kyungmin Parka9da2b42008-03-31 10:40:19 +0900112 crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd));
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +0900113
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);
118 return 2;
119 }
120
121 return 0;
122}
123
124int env_init(void)
125{
Kyungmin Parkd7e8ce12007-09-10 17:15:14 +0900126 /* use default */
127 gd->env_addr = (ulong) & default_environment[0];
128 gd->env_valid = 1;
129
130 return 0;
131}
132
133#endif /* CFG_ENV_IS_IN_ONENAND */