1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 */
6
7#include <common.h>
8#include <dm.h>
9#include <env.h>
10#include <init.h>
11#include <net.h>
12#include <asm/io.h>
13#include <asm/arch/gx.h>
14#include <asm/arch/sm.h>
15#include <asm/arch/eth.h>
16#include <asm/arch/mem.h>
17
18#define EFUSE_SN_OFFSET		20
19#define EFUSE_SN_SIZE		16
20#define EFUSE_MAC_OFFSET	52
21#define EFUSE_MAC_SIZE		6
22
23int misc_init_r(void)
24{
25	u8 mac_addr[EFUSE_MAC_SIZE + 1];
26	char serial[EFUSE_SN_SIZE + 1];
27	ssize_t len;
28
29	if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
30		len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
31					  mac_addr, EFUSE_MAC_SIZE);
32		mac_addr[len] = '\0';
33		if (len == EFUSE_MAC_SIZE && is_valid_ethaddr(mac_addr))
34			eth_env_set_enetaddr("ethaddr", mac_addr);
35		else
36			meson_generate_serial_ethaddr();
37	}
38
39	if (!env_get("serial#")) {
40		len = meson_sm_read_efuse(EFUSE_SN_OFFSET, serial,
41			EFUSE_SN_SIZE);
42		serial[len] = '\0';
43		if (len == EFUSE_SN_SIZE)
44			env_set("serial#", serial);
45	}
46
47	return 0;
48}
49