Merge branch 'master' of http://git.denx.de/u-boot-sunxi
[platform/kernel/u-boot.git] / common / env_fat.c
1 /*
2  * (c) Copyright 2011 by Tigris Elektronik GmbH
3  *
4  * Author:
5  *  Maximilian Schwerin <mvs@tigris.de>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11
12 #include <command.h>
13 #include <environment.h>
14 #include <linux/stddef.h>
15 #include <malloc.h>
16 #include <search.h>
17 #include <errno.h>
18 #include <fat.h>
19 #include <mmc.h>
20
21 char *env_name_spec = "FAT";
22
23 env_t *env_ptr;
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 int env_init(void)
28 {
29         /* use default */
30         gd->env_addr = (ulong)&default_environment[0];
31         gd->env_valid = 1;
32
33         return 0;
34 }
35
36 #ifdef CONFIG_CMD_SAVEENV
37 int saveenv(void)
38 {
39         env_t   env_new;
40         block_dev_desc_t *dev_desc = NULL;
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
49         part = get_device_and_partition(FAT_ENV_INTERFACE,
50                                         FAT_ENV_DEVICE_AND_PART,
51                                         &dev_desc, &info, 1);
52         if (part < 0)
53                 return 1;
54
55         dev = dev_desc->dev;
56         if (fat_set_blk_dev(dev_desc, &info) != 0) {
57                 printf("\n** Unable to use %s %d:%d for saveenv **\n",
58                        FAT_ENV_INTERFACE, dev, part);
59                 return 1;
60         }
61
62         err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t));
63         if (err == -1) {
64                 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
65                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
66                 return 1;
67         }
68
69         puts("done\n");
70         return 0;
71 }
72 #endif /* CONFIG_CMD_SAVEENV */
73
74 void env_relocate_spec(void)
75 {
76         ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
77         block_dev_desc_t *dev_desc = NULL;
78         disk_partition_t info;
79         int dev, part;
80         int err;
81
82         part = get_device_and_partition(FAT_ENV_INTERFACE,
83                                         FAT_ENV_DEVICE_AND_PART,
84                                         &dev_desc, &info, 1);
85         if (part < 0)
86                 goto err_env_relocate;
87
88         dev = dev_desc->dev;
89         if (fat_set_blk_dev(dev_desc, &info) != 0) {
90                 printf("\n** Unable to use %s %d:%d for loading the env **\n",
91                        FAT_ENV_INTERFACE, dev, part);
92                 goto err_env_relocate;
93         }
94
95         err = file_fat_read(FAT_ENV_FILE, buf, CONFIG_ENV_SIZE);
96         if (err == -1) {
97                 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
98                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
99                 goto err_env_relocate;
100         }
101
102         env_import(buf, 1);
103         return;
104
105 err_env_relocate:
106         set_default_env(NULL);
107 }