2 * (c) Copyright 2016 by VRT Technology
5 * Stuart Longland <stuartl@vrt.com.au>
7 * Based on FAT environment driver
8 * (c) Copyright 2011 by Tigris Elektronik GmbH
11 * Maximilian Schwerin <mvs@tigris.de>
13 * and EXT4 filesystem implementation
14 * (C) Copyright 2011 - 2012 Samsung Electronics
15 * EXT4 filesystem implementation in Uboot by
16 * Uma Shankar <uma.shankar@samsung.com>
17 * Manjunatha C Achar <a.manjunatha@samsung.com>
19 * SPDX-License-Identifier: GPL-2.0+
25 #include <environment.h>
26 #include <linux/stddef.h>
34 DECLARE_GLOBAL_DATA_PTR
;
36 #ifdef CONFIG_CMD_SAVEENV
37 static int env_ext4_save(void)
40 struct blk_desc
*dev_desc
= NULL
;
41 disk_partition_t info
;
45 err
= env_export(&env_new
);
49 part
= blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE
,
50 CONFIG_ENV_EXT4_DEVICE_AND_PART
,
55 dev
= dev_desc
->devnum
;
56 ext4fs_set_blk_dev(dev_desc
, &info
);
58 if (!ext4fs_mount(info
.size
)) {
59 printf("\n** Unable to use %s %s for saveenv **\n",
60 CONFIG_ENV_EXT4_INTERFACE
,
61 CONFIG_ENV_EXT4_DEVICE_AND_PART
);
65 err
= ext4fs_write(CONFIG_ENV_EXT4_FILE
, (void *)&env_new
,
70 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
71 CONFIG_ENV_EXT4_FILE
, CONFIG_ENV_EXT4_INTERFACE
, dev
,
79 #endif /* CONFIG_CMD_SAVEENV */
81 static int env_ext4_load(void)
83 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
84 struct blk_desc
*dev_desc
= NULL
;
85 disk_partition_t info
;
90 part
= blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE
,
91 CONFIG_ENV_EXT4_DEVICE_AND_PART
,
94 goto err_env_relocate
;
96 dev
= dev_desc
->devnum
;
97 ext4fs_set_blk_dev(dev_desc
, &info
);
99 if (!ext4fs_mount(info
.size
)) {
100 printf("\n** Unable to use %s %s for loading the env **\n",
101 CONFIG_ENV_EXT4_INTERFACE
,
102 CONFIG_ENV_EXT4_DEVICE_AND_PART
);
103 goto err_env_relocate
;
106 err
= ext4_read_file(CONFIG_ENV_EXT4_FILE
, buf
, 0, CONFIG_ENV_SIZE
,
111 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
112 CONFIG_ENV_EXT4_FILE
, CONFIG_ENV_EXT4_INTERFACE
, dev
,
114 goto err_env_relocate
;
117 return env_import(buf
, 1);
120 set_default_env(NULL
);
125 U_BOOT_ENV_LOCATION(ext4
) = {
126 .location
= ENVL_EXT4
,
128 .load
= env_ext4_load
,
129 .save
= env_save_ptr(env_ext4_save
),