[people/ms/u-boot.git] / common / env_onenand.c

/*
 * (C) Copyright 2005-2007 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>

#if defined(CFG_ENV_IS_IN_ONENAND)	/* Environment is in OneNAND */

#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[];

#define ONENAND_ENV_SIZE(mtd)	(mtd.oobblock - ENV_HEADER_SIZE)

char *env_name_spec = "OneNAND";

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

uchar env_get_char_spec(int index)
{
	DECLARE_GLOBAL_DATA_PTR;

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

void env_relocate_spec(void)
{
	DECLARE_GLOBAL_DATA_PTR;
	unsigned long env_addr;
	int use_default = 0;
	size_t retlen;

	env_addr = CFG_ENV_ADDR;
	env_addr -= (unsigned long)onenand_chip.base;

	/* Check OneNAND exist */
	if (onenand_mtd.oobblock)
		/* Ignore read fail */
		onenand_read(&onenand_mtd, env_addr, onenand_mtd.oobblock,
			     &retlen, (u_char *) env_ptr);
	else
		onenand_mtd.oobblock = MAX_ONENAND_PAGESIZE;

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

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

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

int saveenv(void)
{
	unsigned long env_addr = CFG_ENV_ADDR;
	struct erase_info instr;
	size_t retlen;

	instr.len = CFG_ENV_SIZE;
	instr.addr = env_addr;
	instr.addr -= (unsigned long)onenand_chip.base;
	if (onenand_erase(&onenand_mtd, &instr)) {
		printf("OneNAND: erase failed at 0x%08x\n", env_addr);
		return 1;
	}

	/* update crc */
	env_ptr->crc =
	    crc32(0, env_ptr->data, onenand_mtd.oobblock - ENV_HEADER_SIZE);

	env_addr -= (unsigned long)onenand_chip.base;
	if (onenand_write(&onenand_mtd, env_addr, onenand_mtd.oobblock, &retlen,
	     (u_char *) env_ptr)) {
		printf("OneNAND: write failed at 0x%08x\n", instr.addr);
		return 2;
	}

	return 0;
}

int env_init(void)
{
	DECLARE_GLOBAL_DATA_PTR;

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

	return 0;
}

#endif /* CFG_ENV_IS_IN_ONENAND */
Commit	Line	Data
d7e8ce10 KP	1	/*
	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
	37	extern struct mtd_info onenand_mtd;
	38	extern struct onenand_chip onenand_chip;
	39
	40	/* References to names in env_common.c */
	41	extern uchar default_environment[];
	42
	43	#define ONENAND_ENV_SIZE(mtd) (mtd.oobblock - ENV_HEADER_SIZE)
	44
	45	char *env_name_spec = "OneNAND";
	46
	47	#ifdef ENV_IS_EMBEDDED
	48	extern uchar environment[];
	49	env_t env_ptr = (env_t ) (&environment[0]);
	50	#else /* ! ENV_IS_EMBEDDED */
	51	static unsigned char onenand_env[MAX_ONENAND_PAGESIZE];
	52	env_t env_ptr = (env_t ) onenand_env;
	53	#endif /* ENV_IS_EMBEDDED */
	54
	55	uchar env_get_char_spec(int index)
	56	{
	57	DECLARE_GLOBAL_DATA_PTR;
	58
	59	return (((uchar ) (gd->env_addr + index)));
	60	}
	61
	62	void env_relocate_spec(void)
	63	{
	64	DECLARE_GLOBAL_DATA_PTR;
65	unsigned long env_addr;
66	int use_default = 0;
2ae64f51	67	size_t retlen;
d7e8ce10 KP	68
	69	env_addr = CFG_ENV_ADDR;
	70	env_addr -= (unsigned long)onenand_chip.base;
	71
	72	/* Check OneNAND exist */
	73	if (onenand_mtd.oobblock)
	74	/* Ignore read fail */
	75	onenand_read(&onenand_mtd, env_addr, onenand_mtd.oobblock,
	76	&retlen, (u_char *) env_ptr);
	77	else
	78	onenand_mtd.oobblock = MAX_ONENAND_PAGESIZE;
	79
	80	if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd)) !=
	81	env_ptr->crc)
	82	use_default = 1;
	83
	84	if (use_default) {
	85	memcpy(env_ptr->data, default_environment,
	86	ONENAND_ENV_SIZE(onenand_mtd));
	87	env_ptr->crc =
	88	crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd));
	89	}
	90
	91	gd->env_addr = (ulong) & env_ptr->data;
	92	gd->env_valid = 1;
	93	}
	94
	95	int saveenv(void)
	96	{
	97	unsigned long env_addr = CFG_ENV_ADDR;
	98	struct erase_info instr;
2ae64f51	99	size_t retlen;
d7e8ce10 KP	100
	101	instr.len = CFG_ENV_SIZE;
	102	instr.addr = env_addr;
	103	instr.addr -= (unsigned long)onenand_chip.base;
	104	if (onenand_erase(&onenand_mtd, &instr)) {
	105	printf("OneNAND: erase failed at 0x%08x\n", env_addr);
	106	return 1;
	107	}
	108
	109	/* update crc */
	110	env_ptr->crc =
	111	crc32(0, env_ptr->data, onenand_mtd.oobblock - ENV_HEADER_SIZE);
	112
	113	env_addr -= (unsigned long)onenand_chip.base;
	114	if (onenand_write(&onenand_mtd, env_addr, onenand_mtd.oobblock, &retlen,
	115	(u_char *) env_ptr)) {
	116	printf("OneNAND: write failed at 0x%08x\n", instr.addr);
	117	return 2;
	118	}
	119
	120	return 0;
	121	}
	122
	123	int env_init(void)
	124	{
	125	DECLARE_GLOBAL_DATA_PTR;
	126
	127	/* use default */
	128	gd->env_addr = (ulong) & default_environment[0];
	129	gd->env_valid = 1;
	130
	131	return 0;
	132	}
	133
	134	#endif /* CFG_ENV_IS_IN_ONENAND */