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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (C) 2017 The Android Open Source Project
*/
#include <android_ab.h>
#include <command.h>
#include <env.h>
#include <part.h>
static int do_ab_select(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int ret;
struct blk_desc *dev_desc;
struct disk_partition part_info;
char slot[2];
bool dec_tries = true;
if (argc < 4)
return CMD_RET_USAGE;
for (int i = 4; i < argc; i++) {
if (strcmp(argv[i], "--no-dec") == 0) {
dec_tries = false;
} else {
return CMD_RET_USAGE;
}
}
/* Lookup the "misc" partition from argv[2] and argv[3] */
if (part_get_info_by_dev_and_name_or_num(argv[2], argv[3],
&dev_desc, &part_info,
false) < 0) {
return CMD_RET_FAILURE;
}
ret = ab_select_slot(dev_desc, &part_info, dec_tries);
if (ret < 0) {
printf("Android boot failed, error %d.\n", ret);
return CMD_RET_FAILURE;
}
/* Android standard slot names are 'a', 'b', ... */
slot[0] = BOOT_SLOT_NAME(ret);
slot[1] = '\0';
env_set(argv[1], slot);
printf("ANDROID: Booting slot: %s\n", slot);
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(ab_select, 5, 0, do_ab_select,
"Select the slot used to boot from and register the boot attempt.",
"<slot_var_name> <interface> <dev[:part|#part_name]> [--no-dec]\n"
" - Load the slot metadata from the partition 'part' on\n"
" device type 'interface' instance 'dev' and store the active\n"
" slot in the 'slot_var_name' variable. This also updates the\n"
" Android slot metadata with a boot attempt, which can cause\n"
" successive calls to this function to return a different result\n"
" if the returned slot runs out of boot attempts.\n"
" - If 'part_name' is passed, preceded with a # instead of :, the\n"
" partition name whose label is 'part_name' will be looked up in\n"
" the partition table. This is commonly the \"misc\" partition.\n"
" - If '--no-dec' is set, the number of tries remaining will not\n"
" decremented for the selected boot slot\n"
);
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