1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (c) Copyright 2016 by VRT Technology
4 *
5 * Author:
6 * Stuart Longland <stuartl@vrt.com.au>
7 *
8 * Based on FAT environment driver
9 * (c) Copyright 2011 by Tigris Elektronik GmbH
10 *
11 * Author:
12 * Maximilian Schwerin <mvs@tigris.de>
13 *
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>
19 */
20
21 #include <common.h>
22
23 #include <command.h>
24 #include <env.h>
25 #include <env_internal.h>
26 #include <linux/stddef.h>
27 #include <malloc.h>
28 #include <memalign.h>
29 #include <search.h>
30 #include <errno.h>
31 #include <ext4fs.h>
32 #include <mmc.h>
33
env_ext4_get_intf(void)34 __weak const char *env_ext4_get_intf(void)
35 {
36 return (const char *)CONFIG_ENV_EXT4_INTERFACE;
37 }
38
env_ext4_get_dev_part(void)39 __weak const char *env_ext4_get_dev_part(void)
40 {
41 return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
42 }
43
44 #ifdef CONFIG_CMD_SAVEENV
env_ext4_save(void)45 static int env_ext4_save(void)
46 {
47 env_t env_new;
48 struct blk_desc *dev_desc = NULL;
49 disk_partition_t info;
50 int dev, part;
51 int err;
52 const char *ifname = env_ext4_get_intf();
53 const char *dev_and_part = env_ext4_get_dev_part();
54
55 err = env_export(&env_new);
56 if (err)
57 return err;
58
59 part = blk_get_device_part_str(ifname, dev_and_part,
60 &dev_desc, &info, 1);
61 if (part < 0)
62 return 1;
63
64 dev = dev_desc->devnum;
65 ext4fs_set_blk_dev(dev_desc, &info);
66
67 if (!ext4fs_mount(info.size)) {
68 printf("\n** Unable to use %s %s for saveenv **\n",
69 ifname, dev_and_part);
70 return 1;
71 }
72
73 err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
74 sizeof(env_t), FILETYPE_REG);
75 ext4fs_close();
76
77 if (err == -1) {
78 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
79 CONFIG_ENV_EXT4_FILE, ifname, dev, part);
80 return 1;
81 }
82
83 puts("done\n");
84 return 0;
85 }
86 #endif /* CONFIG_CMD_SAVEENV */
87
env_ext4_load(void)88 static int env_ext4_load(void)
89 {
90 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
91 struct blk_desc *dev_desc = NULL;
92 disk_partition_t info;
93 int dev, part;
94 int err;
95 loff_t off;
96 const char *ifname = env_ext4_get_intf();
97 const char *dev_and_part = env_ext4_get_dev_part();
98
99 #ifdef CONFIG_MMC
100 if (!strcmp(ifname, "mmc"))
101 mmc_initialize(NULL);
102 #endif
103
104 part = blk_get_device_part_str(ifname, dev_and_part,
105 &dev_desc, &info, 1);
106 if (part < 0)
107 goto err_env_relocate;
108
109 dev = dev_desc->devnum;
110 ext4fs_set_blk_dev(dev_desc, &info);
111
112 if (!ext4fs_mount(info.size)) {
113 printf("\n** Unable to use %s %s for loading the env **\n",
114 ifname, dev_and_part);
115 goto err_env_relocate;
116 }
117
118 err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
119 &off);
120 ext4fs_close();
121
122 if (err == -1) {
123 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
124 CONFIG_ENV_EXT4_FILE, ifname, dev, part);
125 goto err_env_relocate;
126 }
127
128 return env_import(buf, 1);
129
130 err_env_relocate:
131 env_set_default(NULL, 0);
132
133 return -EIO;
134 }
135
136 U_BOOT_ENV_LOCATION(ext4) = {
137 .location = ENVL_EXT4,
138 ENV_NAME("EXT4")
139 .load = env_ext4_load,
140 .save = env_save_ptr(env_ext4_save),
141 };
142