1 // SPDX-License-Identifier: GPL-2.0+
3 * (c) Copyright 2011 by Tigris Elektronik GmbH
6 * Maximilian Schwerin <mvs@tigris.de>
12 #include <environment.h>
13 #include <linux/stddef.h>
21 #ifdef CONFIG_SPL_BUILD
22 /* TODO(sjg@chromium.org): Figure out why this is needed */
23 # if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
28 # if defined(CONFIG_CMD_SAVEENV)
34 static int env_fat_save(void)
36 env_t __aligned(ARCH_DMA_MINALIGN) env_new;
37 struct blk_desc *dev_desc = NULL;
38 disk_partition_t info;
43 err = env_export(&env_new);
47 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
48 CONFIG_ENV_FAT_DEVICE_AND_PART,
53 dev = dev_desc->devnum;
54 if (fat_set_blk_dev(dev_desc, &info) != 0) {
56 * This printf is embedded in the messages from env_save that
57 * will calling it. The missing \n is intentional.
59 printf("Unable to use %s %d:%d... ",
60 CONFIG_ENV_FAT_INTERFACE, dev, part);
64 err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
68 * This printf is embedded in the messages from env_save that
69 * will calling it. The missing \n is intentional.
71 printf("Unable to write \"%s\" from %s%d:%d... ",
72 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
78 #endif /* CMD_SAVEENV */
81 static int env_fat_load(void)
83 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
84 struct blk_desc *dev_desc = NULL;
85 disk_partition_t info;
90 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
94 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
95 CONFIG_ENV_FAT_DEVICE_AND_PART,
98 goto err_env_relocate;
100 dev = dev_desc->devnum;
101 if (fat_set_blk_dev(dev_desc, &info) != 0) {
103 * This printf is embedded in the messages from env_save that
104 * will calling it. The missing \n is intentional.
106 printf("Unable to use %s %d:%d... ",
107 CONFIG_ENV_FAT_INTERFACE, dev, part);
108 goto err_env_relocate;
111 err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
114 * This printf is embedded in the messages from env_save that
115 * will calling it. The missing \n is intentional.
117 printf("Unable to read \"%s\" from %s%d:%d... ",
118 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
119 goto err_env_relocate;
122 return env_import(buf, 1);
125 set_default_env(NULL);
131 U_BOOT_ENV_LOCATION(fat) = {
132 .location = ENVL_FAT,
135 .load = env_fat_load,
138 .save = env_save_ptr(env_fat_save),