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 <miiphy.h>
  12 #include <net.h>
  13 #include "eth_internal.h"
  14
  15 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
  16 {
  17         char *end;
  18         int i;
  19
  20         for (i = 0; i < 6; ++i) {
  21                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
  22                 if (addr)
  23                         addr = (*end) ? end + 1 : end;
  24         }
  25 }
  26
  27 int eth_getenv_enetaddr(const char *name, uchar *enetaddr)
  28 {
  29         eth_parse_enetaddr(getenv(name), enetaddr);
  30         return is_valid_ethaddr(enetaddr);
  31 }
  32
  33 int eth_setenv_enetaddr(const char *name, const uchar *enetaddr)
  34 {
  35         char buf[20];
  36
  37         sprintf(buf, "%pM", enetaddr);
  38
  39         return setenv(name, buf);
  40 }
  41
  42 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
  43                                  uchar *enetaddr)
  44 {
  45         char enetvar[32];
  46         sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  47         return eth_getenv_enetaddr(enetvar, enetaddr);
  48 }
  49
  50 int eth_setenv_enetaddr_by_index(const char *base_name, int index,
  51                                  uchar *enetaddr)
  52 {
  53         char enetvar[32];
  54         sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  55         return eth_setenv_enetaddr(enetvar, enetaddr);
  56 }
  57
  58 void eth_common_init(void)
  59 {
  60         bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
  61 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
  62         miiphy_init();
  63 #endif
  64
  65 #ifdef CONFIG_PHYLIB
  66         phy_init();
  67 #endif
  68 }
  69
  70 int eth_mac_skip(int index)
  71 {
  72         char enetvar[15];
  73         char *skip_state;
  74
  75         sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  76         skip_state = getenv(enetvar);
  77         return skip_state != NULL;
  78 }
  79
  80 void eth_current_changed(void)
  81 {
  82         char *act = getenv("ethact");
  83         char *ethrotate;
  84
  85         /*
  86          * The call to eth_get_dev() below has a side effect of rotating
  87          * ethernet device if uc_priv->current == NULL. This is not what
  88          * we want when 'ethrotate' variable is 'no'.
  89          */
  90         ethrotate = getenv("ethrotate");
  91         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  92                 return;
  93
  94         /* update current ethernet name */
  95         if (eth_get_dev()) {
  96                 if (act == NULL || strcmp(act, eth_get_name()) != 0)
  97                         setenv("ethact", eth_get_name());
  98         }
  99         /*
 100          * remove the variable completely if there is no active
 101          * interface
 102          */
 103         else if (act != NULL)
 104                 setenv("ethact", NULL);
 105 }
 106
 107 void eth_try_another(int first_restart)
 108 {
 109         static void *first_failed;
 110         char *ethrotate;
 111
 112         /*
 113          * Do not rotate between network interfaces when
 114          * 'ethrotate' variable is set to 'no'.
 115          */
 116         ethrotate = getenv("ethrotate");
 117         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
 118                 return;
 119
 120         if (!eth_get_dev())
 121                 return;
 122
 123         if (first_restart)
 124                 first_failed = eth_get_dev();
 125
 126         eth_set_current_to_next();
 127
 128         eth_current_changed();
 129
 130         if (first_failed == eth_get_dev())
 131                 net_restart_wrap = 1;
 132 }
 133
 134 void eth_set_current(void)
 135 {
 136         static char *act;
 137         static int  env_changed_id;
 138         int     env_id;
 139
 140         env_id = get_env_id();
 141         if ((act == NULL) || (env_changed_id != env_id)) {
 142                 act = getenv("ethact");
 143                 env_changed_id = env_id;
 144         }
 145
 146         if (act == NULL) {
 147                 char *ethprime = getenv("ethprime");
 148                 void *dev = NULL;
 149
 150                 if (ethprime)
 151                         dev = eth_get_dev_by_name(ethprime);
 152                 if (dev)
 153                         eth_set_dev(dev);
 154                 else
 155                         eth_set_dev(NULL);
 156         } else {
 157                 eth_set_dev(eth_get_dev_by_name(act));
 158         }
 159
 160         eth_current_changed();
 161 }
 162
 163 const char *eth_get_name(void)
 164 {
 165         return eth_get_dev() ? eth_get_dev()->name : "unknown";
 166 }