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// SPDX-License-Identifier: GPL-2.0+
/*
* (c) Copyright 2016 by VRT Technology
*
* Author:
* Stuart Longland <stuartl@vrt.com.au>
*
* Based on FAT environment driver
* (c) Copyright 2011 by Tigris Elektronik GmbH
*
* Author:
* Maximilian Schwerin <mvs@tigris.de>
*
* and EXT4 filesystem implementation
* (C) Copyright 2011 - 2012 Samsung Electronics
* EXT4 filesystem implementation in Uboot by
* Uma Shankar <uma.shankar@samsung.com>
* Manjunatha C Achar <a.manjunatha@samsung.com>
*/
#include <common.h>
#include <part.h>
#include <command.h>
#include <env.h>
#include <env_internal.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
#include <search.h>
#include <errno.h>
#include <ext4fs.h>
#include <mmc.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
__weak const char *env_ext4_get_intf(void)
{
return (const char *)CONFIG_ENV_EXT4_INTERFACE;
}
__weak const char *env_ext4_get_dev_part(void)
{
#ifdef CONFIG_MMC
static char *part_str;
if (!part_str) {
part_str = CONFIG_ENV_EXT4_DEVICE_AND_PART;
if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc") && part_str[0] == ':') {
part_str = "0" CONFIG_ENV_EXT4_DEVICE_AND_PART;
part_str[0] += mmc_get_env_dev();
}
}
return part_str;
#else
return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
#endif
}
static int env_ext4_save_buffer(env_t *env_new)
{
struct blk_desc *dev_desc = NULL;
struct disk_partition info;
int dev, part;
int err;
const char *ifname = env_ext4_get_intf();
const char *dev_and_part = env_ext4_get_dev_part();
part = blk_get_device_part_str(ifname, dev_and_part,
&dev_desc, &info, 1);
if (part < 0)
return 1;
dev = dev_desc->devnum;
ext4fs_set_blk_dev(dev_desc, &info);
if (!ext4fs_mount(info.size)) {
printf("\n** Unable to use %s %s for saveenv **\n",
ifname, dev_and_part);
return 1;
}
err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)env_new,
sizeof(env_t), FILETYPE_REG);
ext4fs_close();
if (err == -1) {
printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
CONFIG_ENV_EXT4_FILE, ifname, dev, part);
return 1;
}
return 0;
}
static int env_ext4_save(void)
{
env_t env_new;
int err;
err = env_export(&env_new);
if (err)
return err;
err = env_ext4_save_buffer(&env_new);
if (err)
return err;
gd->env_valid = ENV_VALID;
puts("done\n");
return 0;
}
static int env_ext4_erase(void)
{
env_t env_new;
int err;
memset(&env_new, 0, sizeof(env_t));
err = env_ext4_save_buffer(&env_new);
if (err)
return err;
gd->env_valid = ENV_INVALID;
puts("done\n");
return 0;
}
static int env_ext4_load(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
struct blk_desc *dev_desc = NULL;
struct disk_partition info;
int dev, part;
int err;
loff_t off;
const char *ifname = env_ext4_get_intf();
const char *dev_and_part = env_ext4_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;
ext4fs_set_blk_dev(dev_desc, &info);
if (!ext4fs_mount(info.size)) {
printf("\n** Unable to use %s %s for loading the env **\n",
ifname, dev_and_part);
goto err_env_relocate;
}
err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
&off);
ext4fs_close();
if (err == -1) {
printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
CONFIG_ENV_EXT4_FILE, ifname, dev, part);
goto err_env_relocate;
}
err = env_import(buf, 1, H_EXTERNAL);
if (!err)
gd->env_valid = ENV_VALID;
return err;
err_env_relocate:
env_set_default(NULL, 0);
return -EIO;
}
U_BOOT_ENV_LOCATION(ext4) = {
.location = ENVL_EXT4,
ENV_NAME("EXT4")
.load = env_ext4_load,
.save = ENV_SAVE_PTR(env_ext4_save),
.erase = ENV_ERASE_PTR(env_ext4_erase),
};
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