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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 <asm/io.h>
11 #include <asm/arch/gx.h>
12 #include <asm/arch/mem.h>
13 #include <asm/arch/sm.h>
14 #include <asm/arch/eth.h>
15 
16 #define EFUSE_SN_OFFSET		20
17 #define EFUSE_SN_SIZE		16
18 #define EFUSE_MAC_OFFSET	52
19 #define EFUSE_MAC_SIZE		6
20 
misc_init_r(void)21 int misc_init_r(void)
22 {
23 	u8 mac_addr[EFUSE_MAC_SIZE];
24 	char serial[EFUSE_SN_SIZE];
25 	ssize_t len;
26 
27 	meson_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
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 		if (len == EFUSE_MAC_SIZE && is_valid_ethaddr(mac_addr))
33 			eth_env_set_enetaddr("ethaddr", mac_addr);
34 		else
35 			meson_generate_serial_ethaddr();
36 	}
37 
38 	if (!env_get("serial#")) {
39 		len = meson_sm_read_efuse(EFUSE_SN_OFFSET, serial,
40 					  EFUSE_SN_SIZE);
41 		if (len == EFUSE_SN_SIZE)
42 			env_set("serial#", serial);
43 	}
44 
45 	return 0;
46 }
47