1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2001-2015
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Joe Hershberger, National Instruments
6 */
7
8#include <common.h>
9#include <bootstage.h>
10#include <dm.h>
11#include <env.h>
12#include <miiphy.h>
13#include <net.h>
14#include "eth_internal.h"
15
16int eth_env_get_enetaddr_by_index(const char *base_name, int index,
17				 uchar *enetaddr)
18{
19	char enetvar[32];
20	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
21	return eth_env_get_enetaddr(enetvar, enetaddr);
22}
23
24int eth_env_set_enetaddr_by_index(const char *base_name, int index,
25				 uchar *enetaddr)
26{
27	char enetvar[32];
28	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
29	return eth_env_set_enetaddr(enetvar, enetaddr);
30}
31
32void eth_common_init(void)
33{
34	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
35#if CONFIG_IS_ENABLED(ETH)
36#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
37	miiphy_init();
38#endif
39#endif
40}
41
42int eth_mac_skip(int index)
43{
44	char enetvar[15];
45	char *skip_state;
46
47	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
48	skip_state = env_get(enetvar);
49	return skip_state != NULL;
50}
51
52void eth_current_changed(void)
53{
54	char *act = env_get("ethact");
55	char *ethrotate;
56
57	/*
58	 * The call to eth_get_dev() below has a side effect of rotating
59	 * ethernet device if uc_priv->current == NULL. This is not what
60	 * we want when 'ethrotate' variable is 'no'.
61	 */
62	ethrotate = env_get("ethrotate");
63	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
64		return;
65
66	/* update current ethernet name */
67	if (eth_get_dev()) {
68		if (act == NULL || strcmp(act, eth_get_name()) != 0)
69			env_set("ethact", eth_get_name());
70	}
71	/*
72	 * remove the variable completely if there is no active
73	 * interface
74	 */
75	else if (act != NULL)
76		env_set("ethact", NULL);
77}
78
79void eth_try_another(int first_restart)
80{
81	static void *first_failed;
82	char *ethrotate;
83
84	/*
85	 * Do not rotate between network interfaces when
86	 * 'ethrotate' variable is set to 'no'.
87	 */
88	ethrotate = env_get("ethrotate");
89	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
90		return;
91
92	if (!eth_get_dev())
93		return;
94
95	if (first_restart)
96		first_failed = eth_get_dev();
97
98	eth_set_current_to_next();
99
100	eth_current_changed();
101
102	if (first_failed == eth_get_dev())
103		net_restart_wrap = 1;
104}
105
106void eth_set_current(void)
107{
108	static char *act;
109	static int  env_changed_id;
110	int	env_id;
111
112	env_id = env_get_id();
113	if ((act == NULL) || (env_changed_id != env_id)) {
114		act = env_get("ethact");
115		env_changed_id = env_id;
116	}
117
118	if (act == NULL) {
119		char *ethprime = env_get("ethprime");
120		void *dev = NULL;
121
122		if (ethprime)
123			dev = eth_get_dev_by_name(ethprime);
124		if (dev)
125			eth_set_dev(dev);
126		else
127			eth_set_dev(NULL);
128	} else {
129		eth_set_dev(eth_get_dev_by_name(act));
130	}
131
132	eth_current_changed();
133}
134
135const char *eth_get_name(void)
136{
137	return eth_get_dev() ? eth_get_dev()->name : "unknown";
138}
139