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      1 // SPDX-License-Identifier: GPL-2.0+
      2 /*
      3  * (C) Copyright 2001-2015
      4  * Wolfgang Denk, DENX Software Engineering, wd (at) 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