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env/fat.c
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d41ce506b Initial Release, ... |
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/* * (c) Copyright 2011 by Tigris Elektronik GmbH * * Author: * Maximilian Schwerin <mvs@tigris.de> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <malloc.h> #include <memalign.h> #include <search.h> #include <errno.h> #include <fat.h> #include <mmc.h> #ifdef CONFIG_SPL_BUILD /* TODO(sjg@chromium.org): Figure out why this is needed */ # if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT) # define LOADENV # endif #else # define LOADENV # if defined(CONFIG_CMD_SAVEENV) # define CMD_SAVEENV # endif #endif DECLARE_GLOBAL_DATA_PTR; #ifdef CMD_SAVEENV static int env_fat_save(void) { env_t __aligned(ARCH_DMA_MINALIGN) env_new; struct blk_desc *dev_desc = NULL; disk_partition_t info; int dev, part; int err; loff_t size; err = env_export(&env_new); if (err) return err; part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, CONFIG_ENV_FAT_DEVICE_AND_PART, &dev_desc, &info, 1); if (part < 0) return 1; dev = dev_desc->devnum; if (fat_set_blk_dev(dev_desc, &info) != 0) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing is intentional. */ printf("Unable to use %s %d:%d... ", CONFIG_ENV_FAT_INTERFACE, dev, part); return 1; } err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t), &size); if (err == -1) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing is intentional. */ printf("Unable to write \"%s\" from %s%d:%d... ", CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); return 1; } return 0; } #endif /* CMD_SAVEENV */ #ifdef LOADENV static int env_fat_load(void) { ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); struct blk_desc *dev_desc = NULL; disk_partition_t info; int dev, part; int err; if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc")) mmc_initialize(NULL); part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, CONFIG_ENV_FAT_DEVICE_AND_PART, &dev_desc, &info, 1); if (part < 0) goto err_env_relocate; dev = dev_desc->devnum; if (fat_set_blk_dev(dev_desc, &info) != 0) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing is intentional. */ printf("Unable to use %s %d:%d... ", CONFIG_ENV_FAT_INTERFACE, dev, part); goto err_env_relocate; } err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE); if (err == -1) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing is intentional. */ printf("Unable to read \"%s\" from %s%d:%d... ", CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); goto err_env_relocate; } return env_import(buf, 1); err_env_relocate: set_default_env(NULL); return -EIO; } #endif /* LOADENV */ U_BOOT_ENV_LOCATION(fat) = { .location = ENVL_FAT, ENV_NAME("FAT") #ifdef LOADENV .load = env_fat_load, #endif #ifdef CMD_SAVEENV .save = env_save_ptr(env_fat_save), #endif }; |