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/*
* (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;
loff_t env_addr;
int use_default = 0;
size_t retlen;
env_addr = CONFIG_ENV_ADDR;
/* 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;
loff_t env_addr = CONFIG_ENV_ADDR;
struct erase_info instr = {
.callback = NULL,
};
size_t retlen;
instr.len = CONFIG_ENV_SIZE;
instr.addr = env_addr;
instr.mtd = mtd;
if (mtd->erase(mtd, &instr)) {
printf("OneNAND: erase failed at 0x%08lx\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;
}
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