net/eth_common.c

   1 /*
   2  * (C) Copyright 2001-2015
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  * Joe Hershberger, National Instruments
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <environment.h>
  12 #include <miiphy.h>
  13 #include <net.h>
  14 #include "eth_internal.h"
  15
  16 int 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
  24 int 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
  32 void eth_common_init(void)
  33 {
  34         bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
  35 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
  36         miiphy_init();
  37 #endif
  38
  39 #ifdef CONFIG_PHYLIB
  40         phy_init();
  41 #endif
  42 }
  43
  44 int eth_mac_skip(int index)
  45 {
  46         char enetvar[15];
  47         char *skip_state;
  48
  49         sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  50         skip_state = env_get(enetvar);
  51         return skip_state != NULL;
  52 }
  53
  54 void eth_current_changed(void)
  55 {
  56         char *act = env_get("ethact");
  57         char *ethrotate;
  58
  59         /*
  60          * The call to eth_get_dev() below has a side effect of rotating
  61          * ethernet device if uc_priv->current == NULL. This is not what
  62          * we want when 'ethrotate' variable is 'no'.
  63          */
  64         ethrotate = env_get("ethrotate");
  65         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  66                 return;
  67
  68         /* update current ethernet name */
  69         if (eth_get_dev()) {
  70                 if (act == NULL || strcmp(act, eth_get_name()) != 0)
  71                         env_set("ethact", eth_get_name());
  72         }
  73         /*
  74          * remove the variable completely if there is no active
  75          * interface
  76          */
  77         else if (act != NULL)
  78                 env_set("ethact", NULL);
  79 }
  80
  81 void eth_try_another(int first_restart)
  82 {
  83         static void *first_failed;
  84         char *ethrotate;
  85
  86         /*
  87          * Do not rotate between network interfaces when
  88          * 'ethrotate' variable is set to 'no'.
  89          */
  90         ethrotate = env_get("ethrotate");
  91         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  92                 return;
  93
  94         if (!eth_get_dev())
  95                 return;
  96
  97         if (first_restart)
  98                 first_failed = eth_get_dev();
  99
 100         eth_set_current_to_next();
 101
 102         eth_current_changed();
 103
 104         if (first_failed == eth_get_dev())
 105                 net_restart_wrap = 1;
 106 }
 107
 108 void eth_set_current(void)
 109 {
 110         static char *act;
 111         static int  env_changed_id;
 112         int     env_id;
 113
 114         env_id = get_env_id();
 115         if ((act == NULL) || (env_changed_id != env_id)) {
 116                 act = env_get("ethact");
 117                 env_changed_id = env_id;
 118         }
 119
 120         if (act == NULL) {
 121                 char *ethprime = env_get("ethprime");
 122                 void *dev = NULL;
 123
 124                 if (ethprime)
 125                         dev = eth_get_dev_by_name(ethprime);
 126                 if (dev)
 127                         eth_set_dev(dev);
 128                 else
 129                         eth_set_dev(NULL);
 130         } else {
 131                 eth_set_dev(eth_get_dev_by_name(act));
 132         }
 133
 134         eth_current_changed();
 135 }
 136
 137 const char *eth_get_name(void)
 138 {
 139         return eth_get_dev() ? eth_get_dev()->name : "unknown";
 140 }