xref: /openbmc/u-boot/net/eth_common.c (revision 2a046ff5)
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 <dm.h>
10 #include <environment.h>
11 #include <miiphy.h>
12 #include <net.h>
13 #include "eth_internal.h"
14 
15 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
16 				 uchar *enetaddr)
17 {
18 	char enetvar[32];
19 	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
20 	return eth_env_get_enetaddr(enetvar, enetaddr);
21 }
22 
23 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
24 				 uchar *enetaddr)
25 {
26 	char enetvar[32];
27 	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
28 	return eth_env_set_enetaddr(enetvar, enetaddr);
29 }
30 
31 void eth_common_init(void)
32 {
33 	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
34 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
35 	miiphy_init();
36 #endif
37 
38 #ifdef CONFIG_PHYLIB
39 	phy_init();
40 #endif
41 }
42 
43 int eth_mac_skip(int index)
44 {
45 	char enetvar[15];
46 	char *skip_state;
47 
48 	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
49 	skip_state = env_get(enetvar);
50 	return skip_state != NULL;
51 }
52 
53 void eth_current_changed(void)
54 {
55 	char *act = env_get("ethact");
56 	char *ethrotate;
57 
58 	/*
59 	 * The call to eth_get_dev() below has a side effect of rotating
60 	 * ethernet device if uc_priv->current == NULL. This is not what
61 	 * we want when 'ethrotate' variable is 'no'.
62 	 */
63 	ethrotate = env_get("ethrotate");
64 	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
65 		return;
66 
67 	/* update current ethernet name */
68 	if (eth_get_dev()) {
69 		if (act == NULL || strcmp(act, eth_get_name()) != 0)
70 			env_set("ethact", eth_get_name());
71 	}
72 	/*
73 	 * remove the variable completely if there is no active
74 	 * interface
75 	 */
76 	else if (act != NULL)
77 		env_set("ethact", NULL);
78 }
79 
80 void eth_try_another(int first_restart)
81 {
82 	static void *first_failed;
83 	char *ethrotate;
84 
85 	/*
86 	 * Do not rotate between network interfaces when
87 	 * 'ethrotate' variable is set to 'no'.
88 	 */
89 	ethrotate = env_get("ethrotate");
90 	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
91 		return;
92 
93 	if (!eth_get_dev())
94 		return;
95 
96 	if (first_restart)
97 		first_failed = eth_get_dev();
98 
99 	eth_set_current_to_next();
100 
101 	eth_current_changed();
102 
103 	if (first_failed == eth_get_dev())
104 		net_restart_wrap = 1;
105 }
106 
107 void eth_set_current(void)
108 {
109 	static char *act;
110 	static int  env_changed_id;
111 	int	env_id;
112 
113 	env_id = get_env_id();
114 	if ((act == NULL) || (env_changed_id != env_id)) {
115 		act = env_get("ethact");
116 		env_changed_id = env_id;
117 	}
118 
119 	if (act == NULL) {
120 		char *ethprime = env_get("ethprime");
121 		void *dev = NULL;
122 
123 		if (ethprime)
124 			dev = eth_get_dev_by_name(ethprime);
125 		if (dev)
126 			eth_set_dev(dev);
127 		else
128 			eth_set_dev(NULL);
129 	} else {
130 		eth_set_dev(eth_get_dev_by_name(act));
131 	}
132 
133 	eth_current_changed();
134 }
135 
136 const char *eth_get_name(void)
137 {
138 	return eth_get_dev() ? eth_get_dev()->name : "unknown";
139 }
140