0901d9f891
Cleanup the env_dataflash.c checkpatch warnings, errors and coding style. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*
|
|
* LowLevel function for DataFlash environment support
|
|
* Author : Gilles Gastaldi (Atmel)
|
|
*
|
|
* 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 <dataflash.h>
|
|
#include <search.h>
|
|
#include <errno.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
env_t *env_ptr;
|
|
|
|
char *env_name_spec = "dataflash";
|
|
|
|
uchar env_get_char_spec(int index)
|
|
{
|
|
uchar c;
|
|
|
|
read_dataflash(CONFIG_ENV_ADDR + index + offsetof(env_t, data),
|
|
1, (char *)&c);
|
|
return c;
|
|
}
|
|
|
|
void env_relocate_spec(void)
|
|
{
|
|
char buf[CONFIG_ENV_SIZE];
|
|
|
|
read_dataflash(CONFIG_ENV_ADDR, CONFIG_ENV_SIZE, buf);
|
|
|
|
env_import(buf, 1);
|
|
}
|
|
|
|
#ifdef CONFIG_ENV_OFFSET_REDUND
|
|
#error No support for redundant environment on dataflash yet!
|
|
#endif
|
|
|
|
int saveenv(void)
|
|
{
|
|
env_t env_new;
|
|
ssize_t len;
|
|
char *res;
|
|
|
|
res = (char *)&env_new.data;
|
|
len = hexport_r(&env_htab, '\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);
|
|
|
|
return write_dataflash(CONFIG_ENV_ADDR,
|
|
(unsigned long)&env_new,
|
|
CONFIG_ENV_SIZE);
|
|
}
|
|
|
|
/*
|
|
* Initialize environment use
|
|
*
|
|
* We are still running from ROM, so data use is limited.
|
|
* Use a (moderately small) buffer on the stack
|
|
*/
|
|
int env_init(void)
|
|
{
|
|
ulong crc, len = ENV_SIZE, new = 0;
|
|
unsigned off;
|
|
uchar buf[64];
|
|
|
|
if (gd->env_valid)
|
|
return 0;
|
|
|
|
AT91F_DataflashInit(); /* prepare for DATAFLASH read/write */
|
|
|
|
/* read old CRC */
|
|
read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc),
|
|
sizeof(ulong), (char *)&crc);
|
|
|
|
off = offsetof(env_t, data);
|
|
while (len > 0) {
|
|
int n = (len > sizeof(buf)) ? sizeof(buf) : len;
|
|
|
|
read_dataflash(CONFIG_ENV_ADDR + off, n, (char *)buf);
|
|
|
|
new = crc32(new, buf, n);
|
|
len -= n;
|
|
off += n;
|
|
}
|
|
|
|
if (crc == new) {
|
|
gd->env_addr = offsetof(env_t, data);
|
|
gd->env_valid = 1;
|
|
} else {
|
|
gd->env_addr = (ulong)&default_environment[0];
|
|
gd->env_valid = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|