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Maximilian Schwerin57210c72012-03-12 23:57:50 +00001/*
2 * (c) Copyright 2011 by Tigris Elektronik GmbH
3 *
4 * Author:
5 * Maximilian Schwerin <mvs@tigris.de>
6 *
Wolfgang Denk3765b3e2013-10-07 13:07:26 +02007 * SPDX-License-Identifier: GPL-2.0+
Maximilian Schwerin57210c72012-03-12 23:57:50 +00008 */
9
10#include <common.h>
11
12#include <command.h>
13#include <environment.h>
14#include <linux/stddef.h>
15#include <malloc.h>
Simon Glasscf92e052015-09-02 17:24:58 -060016#include <memalign.h>
Maximilian Schwerin57210c72012-03-12 23:57:50 +000017#include <search.h>
18#include <errno.h>
19#include <fat.h>
20#include <mmc.h>
21
Simon Glass4415f1d2017-08-03 12:21:58 -060022#ifdef CONFIG_SPL_BUILD
23/* TODO(sjg@chromium.org): Figure out why this is needed */
24# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
25# define LOADENV
26# endif
27#else
28# define LOADENV
29# if defined(CONFIG_CMD_SAVEENV)
30# define CMD_SAVEENV
31# endif
32#endif
33
Maximilian Schwerin57210c72012-03-12 23:57:50 +000034DECLARE_GLOBAL_DATA_PTR;
35
Simon Glass4415f1d2017-08-03 12:21:58 -060036#ifdef CMD_SAVEENV
Simon Glasse5bce242017-08-03 12:22:01 -060037static int env_fat_save(void)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000038{
Tom Rinicd0f4fa2013-04-05 14:55:21 -040039 env_t env_new;
Simon Glass4101f682016-02-29 15:25:34 -070040 struct blk_desc *dev_desc = NULL;
Wu, Joshbe354c12014-06-24 17:31:02 +080041 disk_partition_t info;
42 int dev, part;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000043 int err;
Suriyan Ramasami1ad0b982014-11-17 14:39:35 -080044 loff_t size;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000045
Marek Vasut7ce15262014-03-05 19:59:50 +010046 err = env_export(&env_new);
47 if (err)
48 return err;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000049
Tom Rini43ba3c52017-07-26 21:48:00 -040050 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
51 CONFIG_ENV_FAT_DEVICE_AND_PART,
Wu, Joshbe354c12014-06-24 17:31:02 +080052 &dev_desc, &info, 1);
53 if (part < 0)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000054 return 1;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000055
Simon Glassbcce53d2016-02-29 15:25:51 -070056 dev = dev_desc->devnum;
Wu, Joshbe354c12014-06-24 17:31:02 +080057 if (fat_set_blk_dev(dev_desc, &info) != 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +010058 /*
59 * This printf is embedded in the messages from env_save that
60 * will calling it. The missing \n is intentional.
61 */
62 printf("Unable to use %s %d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -040063 CONFIG_ENV_FAT_INTERFACE, dev, part);
Maximilian Schwerin57210c72012-03-12 23:57:50 +000064 return 1;
65 }
66
Tom Rini43ba3c52017-07-26 21:48:00 -040067 err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
Suriyan Ramasami1ad0b982014-11-17 14:39:35 -080068 &size);
Igor Grinberg9aa90c12012-09-23 05:25:21 +000069 if (err == -1) {
Maxime Ripardd0816da2018-01-23 21:16:55 +010070 /*
71 * This printf is embedded in the messages from env_save that
72 * will calling it. The missing \n is intentional.
73 */
74 printf("Unable to write \"%s\" from %s%d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -040075 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
Maximilian Schwerin57210c72012-03-12 23:57:50 +000076 return 1;
77 }
78
Maximilian Schwerin57210c72012-03-12 23:57:50 +000079 return 0;
80}
Simon Glass4415f1d2017-08-03 12:21:58 -060081#endif /* CMD_SAVEENV */
Maximilian Schwerin57210c72012-03-12 23:57:50 +000082
Simon Glass4415f1d2017-08-03 12:21:58 -060083#ifdef LOADENV
Simon Glassc5951992017-08-03 12:22:17 -060084static int env_fat_load(void)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000085{
Tom Rini6d1966e2014-08-01 13:59:10 -040086 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
Simon Glass4101f682016-02-29 15:25:34 -070087 struct blk_desc *dev_desc = NULL;
Wu, Joshbe354c12014-06-24 17:31:02 +080088 disk_partition_t info;
89 int dev, part;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000090 int err;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000091
Tom Rini43ba3c52017-07-26 21:48:00 -040092 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
93 CONFIG_ENV_FAT_DEVICE_AND_PART,
Wu, Joshbe354c12014-06-24 17:31:02 +080094 &dev_desc, &info, 1);
95 if (part < 0)
96 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000097
Simon Glassbcce53d2016-02-29 15:25:51 -070098 dev = dev_desc->devnum;
Wu, Joshbe354c12014-06-24 17:31:02 +080099 if (fat_set_blk_dev(dev_desc, &info) != 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +0100100 /*
101 * This printf is embedded in the messages from env_save that
102 * will calling it. The missing \n is intentional.
103 */
104 printf("Unable to use %s %d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -0400105 CONFIG_ENV_FAT_INTERFACE, dev, part);
Wu, Joshbe354c12014-06-24 17:31:02 +0800106 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000107 }
108
Tom Rini43ba3c52017-07-26 21:48:00 -0400109 err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
Igor Grinberg9aa90c12012-09-23 05:25:21 +0000110 if (err == -1) {
Maxime Ripardd0816da2018-01-23 21:16:55 +0100111 /*
112 * This printf is embedded in the messages from env_save that
113 * will calling it. The missing \n is intentional.
114 */
115 printf("Unable to read \"%s\" from %s%d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -0400116 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
Wu, Joshbe354c12014-06-24 17:31:02 +0800117 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000118 }
119
120 env_import(buf, 1);
Simon Glassc5951992017-08-03 12:22:17 -0600121 return 0;
Wu, Joshbe354c12014-06-24 17:31:02 +0800122
123err_env_relocate:
124 set_default_env(NULL);
Simon Glassc5951992017-08-03 12:22:17 -0600125
126 return -EIO;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000127}
Simon Glass4415f1d2017-08-03 12:21:58 -0600128#endif /* LOADENV */
129
130U_BOOT_ENV_LOCATION(fat) = {
131 .location = ENVL_FAT,
Simon Glassac358be2017-08-03 12:22:03 -0600132 ENV_NAME("FAT")
Simon Glass4415f1d2017-08-03 12:21:58 -0600133#ifdef LOADENV
Simon Glasse5bce242017-08-03 12:22:01 -0600134 .load = env_fat_load,
Simon Glass4415f1d2017-08-03 12:21:58 -0600135#endif
136#ifdef CMD_SAVEENV
Simon Glasse5bce242017-08-03 12:22:01 -0600137 .save = env_save_ptr(env_fat_save),
Simon Glass4415f1d2017-08-03 12:21:58 -0600138#endif
Simon Glass4415f1d2017-08-03 12:21:58 -0600139};