2 * (c) Copyright 2011 by Tigris Elektronik GmbH
5 * Maximilian Schwerin <mvs@tigris.de>
7 * SPDX-License-Identifier: GPL-2.0+
13 #include <environment.h>
14 #include <linux/stddef.h>
22 #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)
29 # if defined(CONFIG_CMD_SAVEENV)
34 DECLARE_GLOBAL_DATA_PTR
;
37 static int env_fat_save(void)
39 env_t
__aligned(ARCH_DMA_MINALIGN
) env_new
;
40 struct blk_desc
*dev_desc
= NULL
;
41 disk_partition_t info
;
46 err
= env_export(&env_new
);
50 part
= blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE
,
51 CONFIG_ENV_FAT_DEVICE_AND_PART
,
56 dev
= dev_desc
->devnum
;
57 if (fat_set_blk_dev(dev_desc
, &info
) != 0) {
59 * This printf is embedded in the messages from env_save that
60 * will calling it. The missing \n is intentional.
62 printf("Unable to use %s %d:%d... ",
63 CONFIG_ENV_FAT_INTERFACE
, dev
, part
);
67 err
= file_fat_write(CONFIG_ENV_FAT_FILE
, (void *)&env_new
, 0, sizeof(env_t
),
71 * This printf is embedded in the messages from env_save that
72 * will calling it. The missing \n is intentional.
74 printf("Unable to write \"%s\" from %s%d:%d... ",
75 CONFIG_ENV_FAT_FILE
, CONFIG_ENV_FAT_INTERFACE
, dev
, part
);
81 #endif /* CMD_SAVEENV */
84 static int env_fat_load(void)
86 ALLOC_CACHE_ALIGN_BUFFER(char, buf
, CONFIG_ENV_SIZE
);
87 struct blk_desc
*dev_desc
= NULL
;
88 disk_partition_t info
;
92 if (!strcmp(CONFIG_ENV_FAT_INTERFACE
, "mmc"))
95 part
= blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE
,
96 CONFIG_ENV_FAT_DEVICE_AND_PART
,
99 goto err_env_relocate
;
101 dev
= dev_desc
->devnum
;
102 if (fat_set_blk_dev(dev_desc
, &info
) != 0) {
104 * This printf is embedded in the messages from env_save that
105 * will calling it. The missing \n is intentional.
107 printf("Unable to use %s %d:%d... ",
108 CONFIG_ENV_FAT_INTERFACE
, dev
, part
);
109 goto err_env_relocate
;
112 err
= file_fat_read(CONFIG_ENV_FAT_FILE
, buf
, CONFIG_ENV_SIZE
);
115 * This printf is embedded in the messages from env_save that
116 * will calling it. The missing \n is intentional.
118 printf("Unable to read \"%s\" from %s%d:%d... ",
119 CONFIG_ENV_FAT_FILE
, CONFIG_ENV_FAT_INTERFACE
, dev
, part
);
120 goto err_env_relocate
;
123 return env_import(buf
, 1);
126 set_default_env(NULL
);
132 U_BOOT_ENV_LOCATION(fat
) = {
133 .location
= ENVL_FAT
,
136 .load
= env_fat_load
,
139 .save
= env_save_ptr(env_fat_save
),