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// SPDX-License-Identifier: GPL-2.0+
/*
* (c) Copyright 2011 by Tigris Elektronik GmbH
*
* Author:
* Maximilian Schwerin <mvs@tigris.de>
*/
#include <common.h>
#include <command.h>
#include <env.h>
#include <env_internal.h>
#include <part.h>
#include <malloc.h>
#include <memalign.h>
#include <search.h>
#include <errno.h>
#include <fat.h>
#include <mmc.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <linux/stddef.h>
#ifdef CONFIG_SPL_BUILD
/* TODO(sjg@chromium.org): Figure out why this is needed */
# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
# define LOADENV
# endif
#else
# define LOADENV
#endif
DECLARE_GLOBAL_DATA_PTR;
__weak const char *env_fat_get_intf(void)
{
return (const char *)CONFIG_ENV_FAT_INTERFACE;
}
__weak char *env_fat_get_dev_part(void)
{
#ifdef CONFIG_MMC
static char *part_str;
if (!part_str) {
part_str = CONFIG_ENV_FAT_DEVICE_AND_PART;
if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') {
part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART;
part_str[0] += mmc_get_env_dev();
}
}
return part_str;
#else
return CONFIG_ENV_FAT_DEVICE_AND_PART;
#endif
}
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;
const char *ifname = env_fat_get_intf();
const char *dev_and_part = env_fat_get_dev_part();
err = env_export(&env_new);
if (err)
return err;
part = blk_get_device_part_str(ifname, dev_and_part,
&dev_desc, &info, 1);
if (part < 0)
return 1;
dev = dev_desc->devnum;
if (fat_set_blk_dev(dev_desc, &info) != 0) {
/*
* This printf is embedded in the messages from env_save that
* will calling it. The missing \n is intentional.
*/
printf("Unable to use %s %d:%d...\n", ifname, dev, part);
return 1;
}
#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...\n", file, ifname, 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, 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 err1;
const char *ifname = env_fat_get_intf();
const char *dev_and_part = env_fat_get_dev_part();
#ifdef CONFIG_MMC
if (!strcmp(ifname, "mmc"))
mmc_initialize(NULL);
#endif
part = blk_get_device_part_str(ifname, dev_and_part,
&dev_desc, &info, 1);
if (part < 0)
goto err_env_relocate;
dev = dev_desc->devnum;
if (fat_set_blk_dev(dev_desc, &info) != 0) {
/*
* This printf is embedded in the messages from env_save that
* will calling it. The missing \n is intentional.
*/
printf("Unable to use %s %d:%d...\n", ifname, dev, part);
goto err_env_relocate;
}
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.
*/
printf("Unable to read \"%s\" from %s%d:%d... \n",
CONFIG_ENV_FAT_FILE, ifname, dev, part);
goto err_env_relocate;
}
return env_import(buf1, 1, H_EXTERNAL);
#endif
err_env_relocate:
env_set_default(NULL, 0);
return -EIO;
}
#endif /* LOADENV */
U_BOOT_ENV_LOCATION(fat) = {
.location = ENVL_FAT,
ENV_NAME("FAT")
#ifdef LOADENV
.load = env_fat_load,
#endif
.save = ENV_SAVE_PTR(env_fat_save),
};
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