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 <bootstage.h>
  10 #include <dm.h>
  11 #include <env.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 CONFIG_IS_ENABLED(ETH)
  36 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
  37         miiphy_init();
  38 #endif
  39 #endif
  40 }
  41
  42 int eth_mac_skip(int index)
  43 {
  44         char enetvar[15];
  45         char *skip_state;
  46
  47         sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  48         skip_state = env_get(enetvar);
  49         return skip_state != NULL;
  50 }
  51
  52 void eth_current_changed(void)
  53 {
  54         char *act = env_get("ethact");
  55         char *ethrotate;
  56
  57         /*
  58          * The call to eth_get_dev() below has a side effect of rotating
  59          * ethernet device if uc_priv->current == NULL. This is not what
  60          * we want when 'ethrotate' variable is 'no'.
  61          */
  62         ethrotate = env_get("ethrotate");
  63         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  64                 return;
  65
  66         /* update current ethernet name */
  67         if (eth_get_dev()) {
  68                 if (act == NULL || strcmp(act, eth_get_name()) != 0)
  69                         env_set("ethact", eth_get_name());
  70         }
  71         /*
  72          * remove the variable completely if there is no active
  73          * interface
  74          */
  75         else if (act != NULL)
  76                 env_set("ethact", NULL);
  77 }
  78
  79 void eth_try_another(int first_restart)
  80 {
  81         static void *first_failed;
  82         char *ethrotate;
  83
  84         /*
  85          * Do not rotate between network interfaces when
  86          * 'ethrotate' variable is set to 'no'.
  87          */
  88         ethrotate = env_get("ethrotate");
  89         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  90                 return;
  91
  92         if (!eth_get_dev())
  93                 return;
  94
  95         if (first_restart)
  96                 first_failed = eth_get_dev();
  97
  98         eth_set_current_to_next();
  99
 100         eth_current_changed();
 101
 102         if (first_failed == eth_get_dev())
 103                 net_restart_wrap = 1;
 104 }
 105
 106 void eth_set_current(void)
 107 {
 108         static char *act;
 109         static int  env_changed_id;
 110         int     env_id;
 111
 112         env_id = env_get_id();
 113         if ((act == NULL) || (env_changed_id != env_id)) {
 114                 act = env_get("ethact");
 115                 env_changed_id = env_id;
 116         }
 117
 118         if (act == NULL) {
 119                 char *ethprime = env_get("ethprime");
 120                 void *dev = NULL;
 121
 122                 if (ethprime)
 123                         dev = eth_get_dev_by_name(ethprime);
 124                 if (dev)
 125                         eth_set_dev(dev);
 126                 else
 127                         eth_set_dev(NULL);
 128         } else {
 129                 eth_set_dev(eth_get_dev_by_name(act));
 130         }
 131
 132         eth_current_changed();
 133 }
 134
 135 const char *eth_get_name(void)
 136 {
 137         return eth_get_dev() ? eth_get_dev()->name : "unknown";
 138 }