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fd1000b9 SL |
1 | /* |
2 | * (c) Copyright 2016 by VRT Technology | |
3 | * | |
4 | * Author: | |
5 | * Stuart Longland <stuartl@vrt.com.au> | |
6 | * | |
7 | * Based on FAT environment driver | |
8 | * (c) Copyright 2011 by Tigris Elektronik GmbH | |
9 | * | |
10 | * Author: | |
11 | * Maximilian Schwerin <mvs@tigris.de> | |
12 | * | |
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> | |
18 | * | |
19 | * SPDX-License-Identifier: GPL-2.0+ | |
20 | */ | |
21 | ||
22 | #include <common.h> | |
23 | ||
24 | #include <command.h> | |
25 | #include <environment.h> | |
26 | #include <linux/stddef.h> | |
27 | #include <malloc.h> | |
bd62e241 | 28 | #include <memalign.h> |
fd1000b9 SL |
29 | #include <search.h> |
30 | #include <errno.h> | |
31 | #include <ext4fs.h> | |
32 | #include <mmc.h> | |
33 | ||
fd1000b9 SL |
34 | DECLARE_GLOBAL_DATA_PTR; |
35 | ||
fd1000b9 | 36 | #ifdef CONFIG_CMD_SAVEENV |
e5bce247 | 37 | static int env_ext4_save(void) |
fd1000b9 SL |
38 | { |
39 | env_t env_new; | |
bd62e241 | 40 | struct blk_desc *dev_desc = NULL; |
fd1000b9 SL |
41 | disk_partition_t info; |
42 | int dev, part; | |
43 | int err; | |
44 | ||
45 | err = env_export(&env_new); | |
46 | if (err) | |
47 | return err; | |
48 | ||
1087a794 JRO |
49 | part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE, |
50 | CONFIG_ENV_EXT4_DEVICE_AND_PART, | |
51 | &dev_desc, &info, 1); | |
fd1000b9 SL |
52 | if (part < 0) |
53 | return 1; | |
54 | ||
bd62e241 | 55 | dev = dev_desc->devnum; |
fd1000b9 SL |
56 | ext4fs_set_blk_dev(dev_desc, &info); |
57 | ||
58 | if (!ext4fs_mount(info.size)) { | |
59 | printf("\n** Unable to use %s %s for saveenv **\n", | |
1087a794 JRO |
60 | CONFIG_ENV_EXT4_INTERFACE, |
61 | CONFIG_ENV_EXT4_DEVICE_AND_PART); | |
fd1000b9 SL |
62 | return 1; |
63 | } | |
64 | ||
1087a794 JRO |
65 | err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new, |
66 | sizeof(env_t)); | |
fd1000b9 SL |
67 | ext4fs_close(); |
68 | ||
69 | if (err == -1) { | |
70 | printf("\n** Unable to write \"%s\" from %s%d:%d **\n", | |
1087a794 JRO |
71 | CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev, |
72 | part); | |
fd1000b9 SL |
73 | return 1; |
74 | } | |
75 | ||
76 | puts("done\n"); | |
77 | return 0; | |
78 | } | |
79 | #endif /* CONFIG_CMD_SAVEENV */ | |
80 | ||
c5951991 | 81 | static int env_ext4_load(void) |
fd1000b9 SL |
82 | { |
83 | ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); | |
bd62e241 | 84 | struct blk_desc *dev_desc = NULL; |
fd1000b9 SL |
85 | disk_partition_t info; |
86 | int dev, part; | |
87 | int err; | |
bd62e241 | 88 | loff_t off; |
fd1000b9 | 89 | |
26862b4a FA |
90 | if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc")) |
91 | mmc_initialize(NULL); | |
92 | ||
1087a794 JRO |
93 | part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE, |
94 | CONFIG_ENV_EXT4_DEVICE_AND_PART, | |
95 | &dev_desc, &info, 1); | |
fd1000b9 SL |
96 | if (part < 0) |
97 | goto err_env_relocate; | |
98 | ||
bd62e241 | 99 | dev = dev_desc->devnum; |
fd1000b9 SL |
100 | ext4fs_set_blk_dev(dev_desc, &info); |
101 | ||
102 | if (!ext4fs_mount(info.size)) { | |
103 | printf("\n** Unable to use %s %s for loading the env **\n", | |
1087a794 JRO |
104 | CONFIG_ENV_EXT4_INTERFACE, |
105 | CONFIG_ENV_EXT4_DEVICE_AND_PART); | |
fd1000b9 SL |
106 | goto err_env_relocate; |
107 | } | |
108 | ||
1087a794 JRO |
109 | err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE, |
110 | &off); | |
fd1000b9 SL |
111 | ext4fs_close(); |
112 | ||
113 | if (err == -1) { | |
114 | printf("\n** Unable to read \"%s\" from %s%d:%d **\n", | |
1087a794 JRO |
115 | CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev, |
116 | part); | |
fd1000b9 SL |
117 | goto err_env_relocate; |
118 | } | |
119 | ||
2166ebf7 | 120 | return env_import(buf, 1); |
fd1000b9 SL |
121 | |
122 | err_env_relocate: | |
123 | set_default_env(NULL); | |
c5951991 SG |
124 | |
125 | return -EIO; | |
fd1000b9 | 126 | } |
4415f1d1 SG |
127 | |
128 | U_BOOT_ENV_LOCATION(ext4) = { | |
129 | .location = ENVL_EXT4, | |
ac358beb | 130 | ENV_NAME("EXT4") |
e5bce247 SG |
131 | .load = env_ext4_load, |
132 | .save = env_save_ptr(env_ext4_save), | |
4415f1d1 | 133 | }; |