1 /* 2 * (c) Copyright 2016 by VRT Technology 3 * 4 * Author: 5 * Stuart Longland <stuartl@vrt.com.au> 6 * 7 * Based on FAT environment driver 8 * (c) Copyright 2011 by Tigris Elektronik GmbH 9 * 10 * Author: 11 * Maximilian Schwerin <mvs@tigris.de> 12 * 13 * and EXT4 filesystem implementation 14 * (C) Copyright 2011 - 2012 Samsung Electronics 15 * EXT4 filesystem implementation in Uboot by 16 * Uma Shankar <uma.shankar@samsung.com> 17 * Manjunatha C Achar <a.manjunatha@samsung.com> 18 * 19 * SPDX-License-Identifier: GPL-2.0+ 20 */ 21 22 #include <common.h> 23 24 #include <command.h> 25 #include <environment.h> 26 #include <linux/stddef.h> 27 #include <malloc.h> 28 #include <memalign.h> 29 #include <search.h> 30 #include <errno.h> 31 #include <ext4fs.h> 32 #include <mmc.h> 33 34 env_t *env_ptr; 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 #ifdef CONFIG_CMD_SAVEENV 39 static int env_ext4_save(void) 40 { 41 env_t env_new; 42 struct blk_desc *dev_desc = NULL; 43 disk_partition_t info; 44 int dev, part; 45 int err; 46 47 err = env_export(&env_new); 48 if (err) 49 return err; 50 51 part = blk_get_device_part_str(EXT4_ENV_INTERFACE, 52 EXT4_ENV_DEVICE_AND_PART, 53 &dev_desc, &info, 1); 54 if (part < 0) 55 return 1; 56 57 dev = dev_desc->devnum; 58 ext4fs_set_blk_dev(dev_desc, &info); 59 60 if (!ext4fs_mount(info.size)) { 61 printf("\n** Unable to use %s %s for saveenv **\n", 62 EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART); 63 return 1; 64 } 65 66 err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t)); 67 ext4fs_close(); 68 69 if (err == -1) { 70 printf("\n** Unable to write \"%s\" from %s%d:%d **\n", 71 EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part); 72 return 1; 73 } 74 75 puts("done\n"); 76 return 0; 77 } 78 #endif /* CONFIG_CMD_SAVEENV */ 79 80 static void env_ext4_load(void) 81 { 82 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); 83 struct blk_desc *dev_desc = NULL; 84 disk_partition_t info; 85 int dev, part; 86 int err; 87 loff_t off; 88 89 part = blk_get_device_part_str(EXT4_ENV_INTERFACE, 90 EXT4_ENV_DEVICE_AND_PART, 91 &dev_desc, &info, 1); 92 if (part < 0) 93 goto err_env_relocate; 94 95 dev = dev_desc->devnum; 96 ext4fs_set_blk_dev(dev_desc, &info); 97 98 if (!ext4fs_mount(info.size)) { 99 printf("\n** Unable to use %s %s for loading the env **\n", 100 EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART); 101 goto err_env_relocate; 102 } 103 104 err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE, &off); 105 ext4fs_close(); 106 107 if (err == -1) { 108 printf("\n** Unable to read \"%s\" from %s%d:%d **\n", 109 EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part); 110 goto err_env_relocate; 111 } 112 113 env_import(buf, 1); 114 return; 115 116 err_env_relocate: 117 set_default_env(NULL); 118 } 119 120 U_BOOT_ENV_LOCATION(ext4) = { 121 .location = ENVL_EXT4, 122 ENV_NAME("EXT4") 123 .load = env_ext4_load, 124 .save = env_save_ptr(env_ext4_save), 125 }; 126