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Stuart Longlandfd1000b2016-02-23 15:51:26 +10001/*
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>
Andrej Rosanobd62e242016-06-21 17:54:25 +020028#include <memalign.h>
Stuart Longlandfd1000b2016-02-23 15:51:26 +100029#include <search.h>
30#include <errno.h>
31#include <ext4fs.h>
32#include <mmc.h>
33
Stuart Longlandfd1000b2016-02-23 15:51:26 +100034DECLARE_GLOBAL_DATA_PTR;
35
Stuart Longlandfd1000b2016-02-23 15:51:26 +100036#ifdef CONFIG_CMD_SAVEENV
Simon Glasse5bce242017-08-03 12:22:01 -060037static int env_ext4_save(void)
Stuart Longlandfd1000b2016-02-23 15:51:26 +100038{
39 env_t env_new;
Andrej Rosanobd62e242016-06-21 17:54:25 +020040 struct blk_desc *dev_desc = NULL;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100041 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
Andrej Rosanobd62e242016-06-21 17:54:25 +020049 part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
Stuart Longlandfd1000b2016-02-23 15:51:26 +100050 EXT4_ENV_DEVICE_AND_PART,
51 &dev_desc, &info, 1);
52 if (part < 0)
53 return 1;
54
Andrej Rosanobd62e242016-06-21 17:54:25 +020055 dev = dev_desc->devnum;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100056 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",
60 EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
61 return 1;
62 }
63
64 err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
65 ext4fs_close();
66
67 if (err == -1) {
68 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
69 EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
70 return 1;
71 }
72
73 puts("done\n");
74 return 0;
75}
76#endif /* CONFIG_CMD_SAVEENV */
77
Simon Glassc5951992017-08-03 12:22:17 -060078static int env_ext4_load(void)
Stuart Longlandfd1000b2016-02-23 15:51:26 +100079{
80 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
Andrej Rosanobd62e242016-06-21 17:54:25 +020081 struct blk_desc *dev_desc = NULL;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100082 disk_partition_t info;
83 int dev, part;
84 int err;
Andrej Rosanobd62e242016-06-21 17:54:25 +020085 loff_t off;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100086
Andrej Rosanobd62e242016-06-21 17:54:25 +020087 part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
Stuart Longlandfd1000b2016-02-23 15:51:26 +100088 EXT4_ENV_DEVICE_AND_PART,
89 &dev_desc, &info, 1);
90 if (part < 0)
91 goto err_env_relocate;
92
Andrej Rosanobd62e242016-06-21 17:54:25 +020093 dev = dev_desc->devnum;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100094 ext4fs_set_blk_dev(dev_desc, &info);
95
96 if (!ext4fs_mount(info.size)) {
97 printf("\n** Unable to use %s %s for loading the env **\n",
98 EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
99 goto err_env_relocate;
100 }
101
Andrej Rosanobd62e242016-06-21 17:54:25 +0200102 err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE, &off);
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000103 ext4fs_close();
104
105 if (err == -1) {
106 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
107 EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
108 goto err_env_relocate;
109 }
110
111 env_import(buf, 1);
Simon Glassc5951992017-08-03 12:22:17 -0600112 return 0;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000113
114err_env_relocate:
115 set_default_env(NULL);
Simon Glassc5951992017-08-03 12:22:17 -0600116
117 return -EIO;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000118}
Simon Glass4415f1d2017-08-03 12:21:58 -0600119
120U_BOOT_ENV_LOCATION(ext4) = {
121 .location = ENVL_EXT4,
Simon Glassac358be2017-08-03 12:22:03 -0600122 ENV_NAME("EXT4")
Simon Glasse5bce242017-08-03 12:22:01 -0600123 .load = env_ext4_load,
124 .save = env_save_ptr(env_ext4_save),
Simon Glass4415f1d2017-08-03 12:21:58 -0600125};