text: /*
   * (C) Copyright 2001-2015
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   * Joe Hershberger, National Instruments
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>
  #include <dm.h>
  #include <miiphy.h>
  #include <net.h>
  #include "eth_internal.h"
  
  void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
  {
  	char *end;
  	int i;
  
  	for (i = 0; i < 6; ++i) {
  		enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
  		if (addr)
  			addr = (*end) ? end + 1 : end;
  	}
  }
  
  int eth_env_get_enetaddr(const char *name, uchar *enetaddr)
  {
  	eth_parse_enetaddr(env_get(name), enetaddr);
  	return is_valid_ethaddr(enetaddr);
  }
  
  int eth_env_set_enetaddr(const char *name, const uchar *enetaddr)
  {
  	char buf[ARP_HLEN_ASCII + 1];
  
  	if (eth_env_get_enetaddr(name, (uchar *)buf))
  		return -EEXIST;
  
  	sprintf(buf, "%pM", enetaddr);
  
  	return env_set(name, buf);
  }
  
  int eth_env_get_enetaddr_by_index(const char *base_name, int index,
  				 uchar *enetaddr)
  {
  	char enetvar[32];
  	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  	return eth_env_get_enetaddr(enetvar, enetaddr);
  }
  
  int eth_env_set_enetaddr_by_index(const char *base_name, int index,
  				 uchar *enetaddr)
  {
  	char enetvar[32];
  	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  	return eth_env_set_enetaddr(enetvar, enetaddr);
  }
  
  void eth_common_init(void)
  {
  	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
  #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
  	miiphy_init();
  #endif
  
  #ifdef CONFIG_PHYLIB
  	phy_init();
  #endif
  }
  
  int eth_mac_skip(int index)
  {
  	char enetvar[15];
  	char *skip_state;
  
  	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  	skip_state = env_get(enetvar);
  	return skip_state != NULL;
  }
  
  void eth_current_changed(void)
  {
  	char *act = env_get("ethact");
  	char *ethrotate;
  
  	/*
  	 * The call to eth_get_dev() below has a side effect of rotating
  	 * ethernet device if uc_priv->current == NULL. This is not what
  	 * we want when 'ethrotate' variable is 'no'.
  	 */
  	ethrotate = env_get("ethrotate");
  	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  		return;
  
  	/* update current ethernet name */
  	if (eth_get_dev()) {
  		if (act == NULL || strcmp(act, eth_get_name()) != 0)
  			env_set("ethact", eth_get_name());
  	}
  	/*
  	 * remove the variable completely if there is no active
  	 * interface
  	 */
  	else if (act != NULL)
  		env_set("ethact", NULL);
  }
  
  void eth_try_another(int first_restart)
  {
  	static void *first_failed;
  	char *ethrotate;
  
  	/*
  	 * Do not rotate between network interfaces when
  	 * 'ethrotate' variable is set to 'no'.
  	 */
  	ethrotate = env_get("ethrotate");
  	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  		return;
  
  	if (!eth_get_dev())
  		return;
  
  	if (first_restart)
  		first_failed = eth_get_dev();
  
  	eth_set_current_to_next();
  
  	eth_current_changed();
  
  	if (first_failed == eth_get_dev())
  		net_restart_wrap = 1;
  }
  
  void eth_set_current(void)
  {
  	static char *act;
  	static int  env_changed_id;
  	int	env_id;
  
  	env_id = get_env_id();
  	if ((act == NULL) || (env_changed_id != env_id)) {
  		act = env_get("ethact");
  		env_changed_id = env_id;
  	}
  
  	if (act == NULL) {
  		char *ethprime = env_get("ethprime");
  		void *dev = NULL;
  
  		if (ethprime)
  			dev = eth_get_dev_by_name(ethprime);
  		if (dev)
  			eth_set_dev(dev);
  		else
  			eth_set_dev(NULL);
  	} else {
  		eth_set_dev(eth_get_dev_by_name(act));
  	}
  
  	eth_current_changed();
  }
  
  const char *eth_get_name(void)
  {
  	return eth_get_dev() ? eth_get_dev()->name : "unknown";
  }
  