1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 */ 6 7 #include <android_cmds.h> 8 #include <android_ab.h> 9 #include <common.h> 10 #include <command.h> 11 12 static int do_android_ab_select(cmd_tbl_t *cmdtp, int flag, int argc, 13 char * const argv[]) 14 { 15 int ret; 16 struct blk_desc *dev_desc; 17 disk_partition_t part_info; 18 char slot[2]; 19 20 if (argc != 4) 21 return CMD_RET_USAGE; 22 23 /* Lookup the "misc" partition from argv[2] and argv[3] */ 24 if (part_get_info_by_dev_and_name_or_num(argv[2], argv[3], 25 &dev_desc, &part_info) < 0) { 26 return CMD_RET_FAILURE; 27 } 28 29 ret = android_ab_select(dev_desc, &part_info); 30 if (ret < 0) { 31 printf("Android boot failed, error %d.\n", ret); 32 return CMD_RET_FAILURE; 33 } 34 35 /* Android standard slot names are 'a', 'b', ... */ 36 slot[0] = ANDROID_BOOT_SLOT_NAME(ret); 37 slot[1] = '\0'; 38 env_set(argv[1], slot); 39 printf("ANDROID: Booting slot: %s\n", slot); 40 return CMD_RET_SUCCESS; 41 } 42 43 U_BOOT_CMD( 44 android_ab_select, 4, 0, do_android_ab_select, 45 "Select the slot used to boot from and register the boot attempt.", 46 "<slot_var_name> <interface> <dev[:part|;part_name]>\n" 47 " - Load the slot metadata from the partition 'part' on\n" 48 " device type 'interface' instance 'dev' and store the active\n" 49 " slot in the 'slot_var_name' variable. This also updates the\n" 50 " Android slot metadata with a boot attempt, which can cause\n" 51 " successive calls to this function to return a different result\n" 52 " if the returned slot runs out of boot attempts.\n" 53 " - If 'part_name' is passed, preceded with a ; instead of :, the\n" 54 " partition name whose label is 'part_name' will be looked up in\n" 55 " the partition table. This is commonly the \"misc\" partition.\n" 56 ); 57