summaryrefslogtreecommitdiff
path: root/common/env_onenand.c
blob: cf997bf7e507bbda71d3f839fcfcbf3cd004fcc7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * (C) Copyright 2005-2009 Samsung Electronics
 * Kyungmin Park <kyungmin.park@samsung.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>

#include <linux/mtd/compat.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>

extern struct mtd_info onenand_mtd;
extern struct onenand_chip onenand_chip;

/* References to names in env_common.c */
extern uchar default_environment[];

char *env_name_spec = "OneNAND";

#define ONENAND_MAX_ENV_SIZE	4096
#define ONENAND_ENV_SIZE(mtd)	(ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)

#ifdef ENV_IS_EMBEDDED
extern uchar environment[];
env_t *env_ptr = (env_t *) (&environment[0]);
#else /* ! ENV_IS_EMBEDDED */
static unsigned char onenand_env[ONENAND_MAX_ENV_SIZE];
env_t *env_ptr = (env_t *) onenand_env;
#endif /* ENV_IS_EMBEDDED */

DECLARE_GLOBAL_DATA_PTR;

uchar env_get_char_spec(int index)
{
	return (*((uchar *) (gd->env_addr + index)));
}

void env_relocate_spec(void)
{
	struct mtd_info *mtd = &onenand_mtd;
#ifdef CONFIG_ENV_ADDR_FLEX
	struct onenand_chip *this = &onenand_chip;
#endif
	loff_t env_addr;
	int use_default = 0;
	size_t retlen;

	env_addr = CONFIG_ENV_ADDR;
#ifdef CONFIG_ENV_ADDR_FLEX
	if (FLEXONENAND(this))
		env_addr = CONFIG_ENV_ADDR_FLEX;
#endif
	/* Check OneNAND exist */
	if (mtd->writesize)
		/* Ignore read fail */
		mtd->read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
			     &retlen, (u_char *) env_ptr);
	else
		mtd->writesize = MAX_ONENAND_PAGESIZE;

	if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)) != env_ptr->crc)
		use_default = 1;

	if (use_default) {
		memcpy(env_ptr->data, default_environment,
		       ONENAND_ENV_SIZE(mtd));
		env_ptr->crc =
		    crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd));
	}

	gd->env_addr = (ulong) & env_ptr->data;
	gd->env_valid = 1;
}

int saveenv(void)
{
	struct mtd_info *mtd = &onenand_mtd;
#ifdef CONFIG_ENV_ADDR_FLEX
	struct onenand_chip *this = &onenand_chip;
#endif
	loff_t env_addr = CONFIG_ENV_ADDR;
	struct erase_info instr = {
		.callback	= NULL,
	};
	size_t retlen;

	instr.len = CONFIG_ENV_SIZE;
#ifdef CONFIG_ENV_ADDR_FLEX
	if (FLEXONENAND(this)) {
		env_addr = CONFIG_ENV_ADDR_FLEX;
		instr.len = CONFIG_ENV_SIZE_FLEX;
		instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
				1 : 0;
	}
#endif
	instr.addr = env_addr;
	instr.mtd = mtd;
	if (mtd->erase(mtd, &instr)) {
		printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
		return 1;
	}

	/* update crc */
	env_ptr->crc = crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd));

	if (mtd->write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
	     (u_char *) env_ptr)) {
		printf("OneNAND: write failed at 0x%llx\n", instr.addr);
		return 2;
	}

	return 0;
}

int env_init(void)
{
	/* use default */
	gd->env_addr = (ulong) & default_environment[0];
	gd->env_valid = 1;

	return 0;
}