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),