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 char *env_name_spec = "EXT4";
38 DECLARE_GLOBAL_DATA_PTR;
40 static int env_ext4_init(void)
43 gd->env_addr = (ulong)&default_environment[0];
44 gd->env_valid = ENV_VALID;
49 #ifdef CONFIG_CMD_SAVEENV
50 static int env_ext4_save(void)
53 struct blk_desc *dev_desc = NULL;
54 disk_partition_t info;
58 err = env_export(&env_new);
62 part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
63 EXT4_ENV_DEVICE_AND_PART,
68 dev = dev_desc->devnum;
69 ext4fs_set_blk_dev(dev_desc, &info);
71 if (!ext4fs_mount(info.size)) {
72 printf("\n** Unable to use %s %s for saveenv **\n",
73 EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
77 err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
81 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
82 EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
89 #endif /* CONFIG_CMD_SAVEENV */
91 static void env_ext4_load(void)
93 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
94 struct blk_desc *dev_desc = NULL;
95 disk_partition_t info;
100 part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
101 EXT4_ENV_DEVICE_AND_PART,
102 &dev_desc, &info, 1);
104 goto err_env_relocate;
106 dev = dev_desc->devnum;
107 ext4fs_set_blk_dev(dev_desc, &info);
109 if (!ext4fs_mount(info.size)) {
110 printf("\n** Unable to use %s %s for loading the env **\n",
111 EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
112 goto err_env_relocate;
115 err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE, &off);
119 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
120 EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
121 goto err_env_relocate;
128 set_default_env(NULL);
131 U_BOOT_ENV_LOCATION(ext4) = {
132 .location = ENVL_EXT4,
133 .load = env_ext4_load,
134 .save = env_save_ptr(env_ext4_save),
135 .init = env_ext4_init,