1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2022 Marek Vasut <marex@denx.de>
4 * Copyright 2022 DENX Software Engineering GmbH, Philip Oberfichtner <pro@denx.de>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <i2c_eeprom.h>
10 #include <net.h>
11
12 #include "dh_common.h"
13
dh_mac_is_in_env(const char * env)14 bool dh_mac_is_in_env(const char *env)
15 {
16 unsigned char enetaddr[6];
17
18 return eth_env_get_enetaddr(env, enetaddr);
19 }
20
dh_get_mac_from_eeprom(unsigned char * enetaddr,const char * alias)21 int dh_get_mac_from_eeprom(unsigned char *enetaddr, const char *alias)
22 {
23 struct udevice *dev;
24 int ret;
25 ofnode node;
26
27 node = ofnode_path(alias);
28 if (!ofnode_valid(node)) {
29 printf("%s: ofnode for %s not found!", __func__, alias);
30 return -ENOENT;
31 }
32
33 ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, node, &dev);
34 if (ret) {
35 printf("%s: Cannot find EEPROM! ret = %d\n", __func__, ret);
36 return ret;
37 }
38
39 ret = i2c_eeprom_read(dev, 0xfa, enetaddr, 0x6);
40 if (ret) {
41 printf("%s: Error reading EEPROM! ret = %d\n", __func__, ret);
42 return ret;
43 }
44
45 if (!is_valid_ethaddr(enetaddr)) {
46 printf("%s: Address read from EEPROM is invalid!\n", __func__);
47 return -EINVAL;
48 }
49
50 return 0;
51 }
52
dh_setup_mac_address(void)53 __weak int dh_setup_mac_address(void)
54 {
55 unsigned char enetaddr[6];
56
57 if (dh_mac_is_in_env("ethaddr"))
58 return 0;
59
60 if (!dh_get_mac_from_eeprom(enetaddr, "eeprom0"))
61 return eth_env_set_enetaddr("ethaddr", enetaddr);
62
63 printf("%s: Unable to set mac address!\n", __func__);
64 return -ENXIO;
65 }
66