env_sata.c
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/*
* (C) Copyright 2010-2014 Freescale Semiconductor, Inc.
*
* 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
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <errno.h>
#include <sata.h>
char *env_name_spec = "SATA";
#ifdef ENV_IS_EMBEDDED
extern uchar environment[];
env_t *env_ptr = (env_t *)(&environment[0]);
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr;
#endif /* ENV_IS_EMBEDDED */
extern int sata_curr_device;
/* local functions */
#if !defined(ENV_IS_EMBEDDED)
static void use_default(void);
#endif
DECLARE_GLOBAL_DATA_PTR;
uchar env_get_char_spec(int index)
{
return *((uchar *)(gd->env_addr + index));
}
int env_init(void)
{
/* use default */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
return 0;
}
#ifdef CONFIG_CMD_SAVEENV
inline int write_env(block_dev_desc_t *sata, unsigned long size,
unsigned long offset, const void *buffer)
{
uint blk_start, blk_cnt, n;
blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
n = sata->block_write(sata_curr_device, blk_start,
blk_cnt, (u_char *)buffer);
return (n == blk_cnt) ? 0 : -1;
}
int saveenv(void)
{
block_dev_desc_t *sata = NULL;
env_t env_new;
ssize_t len;
char *res;
if (sata_curr_device == -1) {
if (sata_initialize())
return 1;
sata_curr_device = CONFIG_SATA_ENV_DEV;
}
if (sata_curr_device >= CONFIG_SYS_SATA_MAX_DEVICE) {
printf("Unknown SATA(%d) device for environment!\n",
sata_curr_device);
return 1;
}
sata = sata_get_dev(sata_curr_device);
res = (char *)&env_new.data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
return 1;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
printf("Writing to SATA(%d)...", sata_curr_device);
if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, &env_new)) {
puts("failed\n");
return 1;
}
puts("done\n");
return 0;
}
#endif /* CONFIG_CMD_SAVEENV */
inline int read_env(block_dev_desc_t *sata, unsigned long size,
unsigned long offset, const void *buffer)
{
uint blk_start, blk_cnt, n;
blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
n = sata->block_read(sata_curr_device, blk_start,
blk_cnt, (uchar *)buffer);
return (n == blk_cnt) ? 0 : -1;
}
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
block_dev_desc_t *sata = NULL;
char buf[CONFIG_ENV_SIZE];
int ret;
if (sata_curr_device == -1) {
if (sata_initialize())
return;
sata_curr_device = CONFIG_SATA_ENV_DEV;
}
if (sata_curr_device >= CONFIG_SYS_SATA_MAX_DEVICE) {
printf("Unknown SATA(%d) device for environment!\n",
sata_curr_device);
return;
}
sata = sata_get_dev(sata_curr_device);
if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf))
return use_default();
ret = env_import(buf, 1);
if (ret)
gd->env_valid = 1;
#endif
}
#if !defined(ENV_IS_EMBEDDED)
static void use_default()
{
puts("*** Warning - bad CRC or MMC, using default environment\n\n");
set_default_env(NULL);
}
#endif