132 lines
3.0 KiB
C
132 lines
3.0 KiB
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>
|
|
|
|
#ifdef CFG_ENV_IS_IN_SPI_FLASH
|
|
|
|
#include <environment.h>
|
|
#include <spi_flash.h>
|
|
|
|
#ifndef CFG_ENV_SPI_BUS
|
|
# define CFG_ENV_SPI_BUS 0
|
|
#endif
|
|
#ifndef CFG_ENV_SPI_CS
|
|
# define CFG_ENV_SPI_CS 0
|
|
#endif
|
|
#ifndef CFG_ENV_SPI_MAX_HZ
|
|
# define CFG_ENV_SPI_MAX_HZ 1000000
|
|
#endif
|
|
#ifndef CFG_ENV_SPI_MODE
|
|
# define CFG_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)
|
|
{
|
|
if (!env_flash) {
|
|
puts("Environment SPI flash not initialized\n");
|
|
return 1;
|
|
}
|
|
|
|
puts("Erasing SPI flash...");
|
|
if (spi_flash_erase(env_flash, CFG_ENV_OFFSET, CFG_ENV_SIZE))
|
|
return 1;
|
|
|
|
puts("Writing to SPI flash...");
|
|
if (spi_flash_write(env_flash, CFG_ENV_OFFSET, CFG_ENV_SIZE, env_ptr))
|
|
return 1;
|
|
|
|
puts("done\n");
|
|
return 0;
|
|
}
|
|
|
|
void env_relocate_spec(void)
|
|
{
|
|
int ret;
|
|
|
|
env_flash = spi_flash_probe(CFG_ENV_SPI_BUS, CFG_ENV_SPI_CS,
|
|
CFG_ENV_SPI_MAX_HZ, CFG_ENV_SPI_MODE);
|
|
if (!env_flash)
|
|
goto err_probe;
|
|
|
|
ret = spi_flash_read(env_flash, CFG_ENV_OFFSET, CFG_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 > CFG_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;
|
|
}
|
|
|
|
#endif /* CFG_ENV_IS_IN_SPI_FLASH */
|