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