net/eth_common.c

   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 }