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env/fat.c: support redund environment 

Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>
CC: Joe Hershberger <joe.hershberger@ni.com>
CC: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Brandon Maier 2021-01-16 15:14:43 -06:00 committed by Tom Rini
parent 9636bf8b2e
commit 2339f01af6
2 changed files with 40 additions and 8 deletions
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8
env/Kconfig vendored
View File

@ -476,6 +476,14 @@ config ENV_FAT_FILE
It's a string of the FAT file name. This file use to store the
environment.
config ENV_FAT_FILE_REDUND
string "Name of the FAT file to use for the environment"
depends on ENV_IS_IN_FAT && SYS_REDUNDAND_ENVIRONMENT
default "uboot-redund.env"
help
It's a string of the FAT file name. This file use to store the
redundant environment.
config ENV_EXT4_INTERFACE
string "Name of the block device for the environment"
depends on ENV_IS_IN_EXT4

40
env/fat.c vendored
View File

@ -18,6 +18,7 @@
#include <fat.h>
#include <mmc.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <linux/stddef.h>
#ifdef CONFIG_SPL_BUILD
@ -29,6 +30,8 @@
# define LOADENV
#endif
DECLARE_GLOBAL_DATA_PTR;
static char *env_fat_device_and_part(void)
{
#ifdef CONFIG_MMC
@ -53,6 +56,7 @@ static int env_fat_save(void)
env_t __aligned(ARCH_DMA_MINALIGN) env_new;
struct blk_desc *dev_desc = NULL;
struct disk_partition info;
const char *file = CONFIG_ENV_FAT_FILE;
int dev, part;
int err;
loff_t size;
@ -78,29 +82,41 @@ static int env_fat_save(void)
return 1;
}
err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
&size);
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
if (gd->env_valid == ENV_VALID)
file = CONFIG_ENV_FAT_FILE_REDUND;
#endif
err = file_fat_write(file, (void *)&env_new, 0, sizeof(env_t), &size);
if (err == -1) {
/*
* This printf is embedded in the messages from env_save that
* will calling it. The missing \n is intentional.
*/
printf("Unable to write \"%s\" from %s%d:%d... ",
CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
file, CONFIG_ENV_FAT_INTERFACE, dev, part);
return 1;
}
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
gd->env_valid = (gd->env_valid == ENV_REDUND) ? ENV_VALID : ENV_REDUND;
#endif
return 0;
}
#ifdef LOADENV
static int env_fat_load(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
ALLOC_CACHE_ALIGN_BUFFER(char, buf1, CONFIG_ENV_SIZE);
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
ALLOC_CACHE_ALIGN_BUFFER(char, buf2, CONFIG_ENV_SIZE);
int err2;
#endif
struct blk_desc *dev_desc = NULL;
struct disk_partition info;
int dev, part;
int err;
int err1;
#ifdef CONFIG_MMC
if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
@ -124,8 +140,15 @@ static int env_fat_load(void)
goto err_env_relocate;
}
err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
if (err == -1) {
err1 = file_fat_read(CONFIG_ENV_FAT_FILE, buf1, CONFIG_ENV_SIZE);
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
err2 = file_fat_read(CONFIG_ENV_FAT_FILE_REDUND, buf2, CONFIG_ENV_SIZE);
err1 = (err1 >= 0) ? 0 : -1;
err2 = (err2 >= 0) ? 0 : -1;
return env_import_redund(buf1, err1, buf2, err2, H_EXTERNAL);
#else
if (err1 < 0) {
/*
* This printf is embedded in the messages from env_save that
* will calling it. The missing \n is intentional.
@ -135,7 +158,8 @@ static int env_fat_load(void)
goto err_env_relocate;
}
return env_import(buf, 1, H_EXTERNAL);
return env_import(buf1, 1, H_EXTERNAL);
#endif
err_env_relocate:
env_set_default(NULL, 0);