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Googler5e15fb12022-06-11 12:44:13 +08001/*
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
21char *env_name_spec = "FAT";
22
23env_t *env_ptr;
24
25DECLARE_GLOBAL_DATA_PTR;
26
27int 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
37int 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 loff_t size;
45
46 err = env_export(&env_new);
47 if (err)
48 return err;
49
50 part = get_device_and_partition(FAT_ENV_INTERFACE,
51 FAT_ENV_DEVICE_AND_PART,
52 &dev_desc, &info, 1);
53 if (part < 0)
54 return 1;
55
56 dev = dev_desc->dev;
57 if (fat_set_blk_dev(dev_desc, &info) != 0) {
58 printf("\n** Unable to use %s %d:%d for saveenv **\n",
59 FAT_ENV_INTERFACE, dev, part);
60 return 1;
61 }
62
63 err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, 0, sizeof(env_t),
64 &size);
65 if (err == -1) {
66 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
67 FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
68 return 1;
69 }
70
71 puts("done\n");
72 return 0;
73}
74#endif /* CONFIG_CMD_SAVEENV */
75
76void env_relocate_spec(void)
77{
78 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
79 block_dev_desc_t *dev_desc = NULL;
80 disk_partition_t info;
81 int dev, part;
82 int err;
83
84 part = get_device_and_partition(FAT_ENV_INTERFACE,
85 FAT_ENV_DEVICE_AND_PART,
86 &dev_desc, &info, 1);
87 if (part < 0)
88 goto err_env_relocate;
89
90 dev = dev_desc->dev;
91 if (fat_set_blk_dev(dev_desc, &info) != 0) {
92 printf("\n** Unable to use %s %d:%d for loading the env **\n",
93 FAT_ENV_INTERFACE, dev, part);
94 goto err_env_relocate;
95 }
96
97 err = file_fat_read(FAT_ENV_FILE, buf, CONFIG_ENV_SIZE);
98 if (err == -1) {
99 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
100 FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
101 goto err_env_relocate;
102 }
103
104 env_import(buf, 1);
105 return;
106
107err_env_relocate:
108 set_default_env(NULL);
109}