cmd/factory_boot.c

/*
 * Copyright (c) 2020 The Fuchsia Authors
 */

#include <common.h>
#include <command.h>
#include <factory_boot_kvs.h>

static int do_get(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
	FbKvsResult ret;
	FbKvsValueType type;
	size_t size;
	uintptr_t addr;

	if (argc < 3 || !argv[1][0])
		return CMD_RET_USAGE;

	const char *key = argv[1];
	addr = (uintptr_t)simple_strtoul(argv[2], NULL, 0);
	if (!addr) {
		printf("[factory boot:get] Invalid address for %s: %s\n", key, argv[2]);
		return CMD_RET_USAGE;
	}

	/* factory_boot kvs has to be already initialized */
	ret = FbKvsGetValueSize(key, &size);
	if (ret != kFbKvsResultOk) {
		printf("[factory boot:get] Failed to get the value size for %s: %d\n", key, ret);
		return CMD_RET_FAILURE;
	}

	ret = FbKvsGetValueType(key, &type);
	if (ret != kFbKvsResultOk) {
		printf("[factory boot:get] Failed to get the value type for %s: %d\n", key, ret);
		return CMD_RET_FAILURE;
	}

	switch (type) {
		case kFbKvsTypeString:
			ret = FbKvsGetString(key, (char *)addr, &size);
			break;
		case kFbKvsTypeLong:
			ret = FbKvsGetLong(key, (int64_t *)addr);
			break;
		case kFbKvsTypeULong:
			ret = FbKvsGetULong(key, (uint64_t *)addr);
			break;
		case kFbKvsTypeData:
			ret = FbKvsGetData(key, (uint8_t *)addr, &size);
			break;
		default:
			printf("[factory boot:get] Unknown type: %d\n", type);
			return CMD_RET_FAILURE;
	}

	return CMD_RET_SUCCESS;
}

static cmd_tbl_t commands[] = {
	U_BOOT_CMD_MKENT(get, /* maxargs = */ 3, /* repeatable = */ 0, do_get,
			 "", ""),
};

static int do_factory_boot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
	cmd_tbl_t *cmd;
	int ret;

	if (argc < 2)
		return CMD_RET_USAGE;

	argc--;
	argv++;

	cmd = find_cmd_tbl(argv[0], commands, ARRAY_SIZE(commands));
	if (!cmd || argc > cmd->maxargs)
		return CMD_RET_USAGE;

	ret = cmd->cmd(cmd, flag, argc, argv);
	return cmd_process_error(cmdtp, ret);
}

U_BOOT_CMD(
	factory_boot, /* maxargs = */ 4, /* repeatable = */ 0, do_factory_boot,
	"Factory Boot KVS.",
	"factory_boot get <name> [address]- Read a value of |name| to |address|.\n"
);