1 // SPDX-License-Identifier: GPL-2.0+
3 * (c) Copyright 2016 by VRT Technology
6 * Stuart Longland <stuartl@vrt.com.au>
8 * Based on FAT environment driver
9 * (c) Copyright 2011 by Tigris Elektronik GmbH
12 * Maximilian Schwerin <mvs@tigris.de>
14 * and EXT4 filesystem implementation
15 * (C) Copyright 2011 - 2012 Samsung Electronics
16 * EXT4 filesystem implementation in Uboot by
17 * Uma Shankar <uma.shankar@samsung.com>
18 * Manjunatha C Achar <a.manjunatha@samsung.com>
26 #include <env_internal.h>
27 #include <linux/stddef.h>
35 #include <asm/global_data.h>
37 DECLARE_GLOBAL_DATA_PTR;
39 __weak const char *env_ext4_get_intf(void)
41 return (const char *)CONFIG_ENV_EXT4_INTERFACE;
44 __weak const char *env_ext4_get_dev_part(void)
47 static char *part_str;
50 part_str = CONFIG_ENV_EXT4_DEVICE_AND_PART;
51 if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc") && part_str[0] == ':') {
52 part_str = "0" CONFIG_ENV_EXT4_DEVICE_AND_PART;
53 part_str[0] += mmc_get_env_dev();
59 return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
63 static int env_ext4_save_buffer(env_t *env_new)
65 struct blk_desc *dev_desc = NULL;
66 struct disk_partition info;
69 const char *ifname = env_ext4_get_intf();
70 const char *dev_and_part = env_ext4_get_dev_part();
72 part = blk_get_device_part_str(ifname, dev_and_part,
77 dev = dev_desc->devnum;
78 ext4fs_set_blk_dev(dev_desc, &info);
80 if (!ext4fs_mount(info.size)) {
81 printf("\n** Unable to use %s %s for saveenv **\n",
82 ifname, dev_and_part);
86 err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)env_new,
87 sizeof(env_t), FILETYPE_REG);
91 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
92 CONFIG_ENV_EXT4_FILE, ifname, dev, part);
99 static int env_ext4_save(void)
104 err = env_export(&env_new);
108 err = env_ext4_save_buffer(&env_new);
112 gd->env_valid = ENV_VALID;
118 static int env_ext4_erase(void)
123 memset(&env_new, 0, sizeof(env_t));
125 err = env_ext4_save_buffer(&env_new);
129 gd->env_valid = ENV_INVALID;
135 static int env_ext4_load(void)
137 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
138 struct blk_desc *dev_desc = NULL;
139 struct disk_partition info;
143 const char *ifname = env_ext4_get_intf();
144 const char *dev_and_part = env_ext4_get_dev_part();
147 if (!strcmp(ifname, "mmc"))
148 mmc_initialize(NULL);
150 #if defined(CONFIG_AHCI) || defined(CONFIG_SCSI)
151 if (!strcmp(ifname, "scsi"))
155 part = blk_get_device_part_str(ifname, dev_and_part,
156 &dev_desc, &info, 1);
158 goto err_env_relocate;
160 dev = dev_desc->devnum;
161 ext4fs_set_blk_dev(dev_desc, &info);
163 if (!ext4fs_mount(info.size)) {
164 printf("\n** Unable to use %s %s for loading the env **\n",
165 ifname, dev_and_part);
166 goto err_env_relocate;
169 err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
174 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
175 CONFIG_ENV_EXT4_FILE, ifname, dev, part);
176 goto err_env_relocate;
179 err = env_import(buf, 1, H_EXTERNAL);
181 gd->env_valid = ENV_VALID;
186 env_set_default(NULL, 0);
191 U_BOOT_ENV_LOCATION(ext4) = {
192 .location = ENVL_EXT4,
194 .load = env_ext4_load,
195 .save = ENV_SAVE_PTR(env_ext4_save),
196 .erase = ENV_ERASE_PTR(env_ext4_erase),