1 /* 2 * (c) Copyright 2011 by Tigris Elektronik GmbH 3 * 4 * Author: 5 * Maximilian Schwerin <mvs@tigris.de> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 12 #include <command.h> 13 #include <environment.h> 14 #include <linux/stddef.h> 15 #include <malloc.h> 16 #include <memalign.h> 17 #include <search.h> 18 #include <errno.h> 19 #include <fat.h> 20 #include <mmc.h> 21 22 char *env_name_spec = "FAT"; 23 24 env_t *env_ptr; 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 int env_init(void) 29 { 30 /* use default */ 31 gd->env_addr = (ulong)&default_environment[0]; 32 gd->env_valid = ENV_VALID; 33 34 return 0; 35 } 36 37 #ifdef CONFIG_CMD_SAVEENV 38 int saveenv(void) 39 { 40 env_t env_new; 41 struct blk_desc *dev_desc = NULL; 42 disk_partition_t info; 43 int dev, part; 44 int err; 45 loff_t size; 46 47 err = env_export(&env_new); 48 if (err) 49 return err; 50 51 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, 52 CONFIG_ENV_FAT_DEVICE_AND_PART, 53 &dev_desc, &info, 1); 54 if (part < 0) 55 return 1; 56 57 dev = dev_desc->devnum; 58 if (fat_set_blk_dev(dev_desc, &info) != 0) { 59 printf("\n** Unable to use %s %d:%d for saveenv **\n", 60 CONFIG_ENV_FAT_INTERFACE, dev, part); 61 return 1; 62 } 63 64 err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t), 65 &size); 66 if (err == -1) { 67 printf("\n** Unable to write \"%s\" from %s%d:%d **\n", 68 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); 69 return 1; 70 } 71 72 puts("done\n"); 73 return 0; 74 } 75 #endif /* CONFIG_CMD_SAVEENV */ 76 77 void env_relocate_spec(void) 78 { 79 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); 80 struct blk_desc *dev_desc = NULL; 81 disk_partition_t info; 82 int dev, part; 83 int err; 84 85 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, 86 CONFIG_ENV_FAT_DEVICE_AND_PART, 87 &dev_desc, &info, 1); 88 if (part < 0) 89 goto err_env_relocate; 90 91 dev = dev_desc->devnum; 92 if (fat_set_blk_dev(dev_desc, &info) != 0) { 93 printf("\n** Unable to use %s %d:%d for loading the env **\n", 94 CONFIG_ENV_FAT_INTERFACE, dev, part); 95 goto err_env_relocate; 96 } 97 98 err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE); 99 if (err == -1) { 100 printf("\n** Unable to read \"%s\" from %s%d:%d **\n", 101 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); 102 goto err_env_relocate; 103 } 104 105 env_import(buf, 1); 106 return; 107 108 err_env_relocate: 109 set_default_env(NULL); 110 } 111