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

/*
 * (C) Copyright 2000-2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.de>
 *
 * (C) Copyright 2008 Atmel Corporation
 *
 * 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 <environment.h>
#include <spi_flash.h>

#ifndef CONFIG_ENV_SPI_BUS
# define CONFIG_ENV_SPI_BUS	0
#endif
#ifndef CONFIG_ENV_SPI_CS
# define CONFIG_ENV_SPI_CS		0
#endif
#ifndef CONFIG_ENV_SPI_MAX_HZ
# define CONFIG_ENV_SPI_MAX_HZ	1000000
#endif
#ifndef CONFIG_ENV_SPI_MODE
# define CONFIG_ENV_SPI_MODE	SPI_MODE_3
#endif

DECLARE_GLOBAL_DATA_PTR;

/* references to names in env_common.c */
extern uchar default_environment[];
extern int default_environment_size;

char * env_name_spec = "SPI Flash";
env_t *env_ptr;

static struct spi_flash *env_flash;

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

int saveenv(void)
{
	u32 sector = 1;

	if (!env_flash) {
		puts("Environment SPI flash not initialized\n");
		return 1;
	}

	if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
		sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
		if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
			sector++;
	}

	puts("Erasing SPI flash...");
	if (spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, sector * CONFIG_ENV_SECT_SIZE))
		return 1;

	puts("Writing to SPI flash...");
	if (spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr))
		return 1;

	puts("done\n");
	return 0;
}

void env_relocate_spec(void)
{
	int ret;

	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	if (!env_flash)
		goto err_probe;

	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr);
	if (ret)
		goto err_read;

	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
		goto err_crc;

	gd->env_valid = 1;

	return;

err_read:
	spi_flash_free(env_flash);
	env_flash = NULL;
err_probe:
err_crc:
	puts("*** Warning - bad CRC, using default environment\n\n");

	if (default_environment_size > CONFIG_ENV_SIZE) {
		gd->env_valid = 0;
		puts("*** Error - default environment is too large\n\n");
		return;
	}

	memset(env_ptr, 0, sizeof(env_t));
	memcpy(env_ptr->data, default_environment, default_environment_size);
	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
	gd->env_valid = 1;
}

int env_init(void)
{
	/* SPI flash isn't usable before relocation */
	gd->env_addr = (ulong)&default_environment[0];
	gd->env_valid = 1;

	return 0;
}
Commit	Line	Data
8c66497e HS	1	/*
	2	* (C) Copyright 2000-2002
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	6	* Andreas Heppel <aheppel@sysgo.de>
	7	*
	8	* (C) Copyright 2008 Atmel Corporation
	9	*
	10	* See file CREDITS for list of people who contributed to this
	11	* project.
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License as
	15	* published by the Free Software Foundation; either version 2 of
	16	* the License, or (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	26	* MA 02111-1307 USA
	27	*/
	28	#include <common.h>
8c66497e HS	29	#include <environment.h>
	30	#include <spi_flash.h>
	31
0e8d1586 JCPV	32	#ifndef CONFIG_ENV_SPI_BUS
0e8d1586 JCPV	33	# define CONFIG_ENV_SPI_BUS 0
8c66497e	34	#endif
0e8d1586 JCPV	35	#ifndef CONFIG_ENV_SPI_CS
0e8d1586 JCPV	36	# define CONFIG_ENV_SPI_CS 0
8c66497e	37	#endif
0e8d1586 JCPV	38	#ifndef CONFIG_ENV_SPI_MAX_HZ
0e8d1586 JCPV	39	# define CONFIG_ENV_SPI_MAX_HZ 1000000
8c66497e	40	#endif
0e8d1586 JCPV	41	#ifndef CONFIG_ENV_SPI_MODE
0e8d1586 JCPV	42	# define CONFIG_ENV_SPI_MODE SPI_MODE_3
8c66497e HS	43	#endif
	44
	45	DECLARE_GLOBAL_DATA_PTR;
	46
	47	/* references to names in env_common.c */
	48	extern uchar default_environment[];
	49	extern int default_environment_size;
	50
	51	char * env_name_spec = "SPI Flash";
	52	env_t *env_ptr;
	53
	54	static struct spi_flash *env_flash;
	55
	56	uchar env_get_char_spec(int index)
	57	{
	58	return ((uchar )(gd->env_addr + index));
	59	}
	60
	61	int saveenv(void)
	62	{
07efc9e3 TL	63	u32 sector = 1;
07efc9e3 TL	64
8c66497e HS	65	if (!env_flash) {
	66	puts("Environment SPI flash not initialized\n");
	67	return 1;
	68	}
	69
0e8d1586 JCPV	70	if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
	71	sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
	72	if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
07efc9e3 TL	73	sector++;
	74	}
	75
8c66497e	76	puts("Erasing SPI flash...");
0e8d1586	77	if (spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, sector * CONFIG_ENV_SECT_SIZE))
8c66497e HS	78	return 1;
	79
	80	puts("Writing to SPI flash...");
0e8d1586	81	if (spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr))
8c66497e HS	82	return 1;
	83
	84	puts("done\n");
	85	return 0;
	86	}
	87
	88	void env_relocate_spec(void)
	89	{
	90	int ret;
	91
0e8d1586 JCPV	92	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
0e8d1586 JCPV	93	CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
8c66497e HS	94	if (!env_flash)
	95	goto err_probe;
	96
0e8d1586	97	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr);
8c66497e HS	98	if (ret)
	99	goto err_read;
	100
	101	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
	102	goto err_crc;
	103
	104	gd->env_valid = 1;
	105
	106	return;
	107
	108	err_read:
	109	spi_flash_free(env_flash);
	110	env_flash = NULL;
	111	err_probe:
	112	err_crc:
	113	puts("*** Warning - bad CRC, using default environment\n\n");
	114
0e8d1586	115	if (default_environment_size > CONFIG_ENV_SIZE) {
8c66497e HS	116	gd->env_valid = 0;
	117	puts("*** Error - default environment is too large\n\n");
	118	return;
	119	}
	120
	121	memset(env_ptr, 0, sizeof(env_t));
	122	memcpy(env_ptr->data, default_environment, default_environment_size);
	123	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
	124	gd->env_valid = 1;
	125	}
	126
	127	int env_init(void)
	128	{
	129	/* SPI flash isn't usable before relocation */
	130	gd->env_addr = (ulong)&default_environment[0];
	131	gd->env_valid = 1;
	132
	133	return 0;
	134	}