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/mem.h>
15 #include <asm/arch/sm.h>
16 #include <asm/arch/eth.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 
misc_init_r(void)23 int misc_init_r(void)
24 {
25 	u8 mac_addr[EFUSE_MAC_SIZE];
26 	char serial[EFUSE_SN_SIZE];
27 	ssize_t len;
28 
29 	meson_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
30 
31 	if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
32 		len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
33 					  mac_addr, EFUSE_MAC_SIZE);
34 		if (len == EFUSE_MAC_SIZE && is_valid_ethaddr(mac_addr))
35 			eth_env_set_enetaddr("ethaddr", mac_addr);
36 		else
37 			meson_generate_serial_ethaddr();
38 	}
39 
40 	if (!env_get("serial#")) {
41 		len = meson_sm_read_efuse(EFUSE_SN_OFFSET, serial,
42 					  EFUSE_SN_SIZE);
43 		if (len == EFUSE_SN_SIZE)
44 			env_set("serial#", serial);
45 	}
46 
47 	return 0;
48 }
49