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_env_get_enetaddr(const char *name, uchar *enetaddr)
  28 {
  29         eth_parse_enetaddr(env_get(name), enetaddr);
  30         return is_valid_ethaddr(enetaddr);
  31 }
  32
  33 int eth_env_set_enetaddr(const char *name, const uchar *enetaddr)
  34 {
  35         char buf[ARP_HLEN_ASCII + 1];
  36
  37         if (eth_env_get_enetaddr(name, (uchar *)buf))
  38                 return -EEXIST;
  39
  40         sprintf(buf, "%pM", enetaddr);
  41
  42         return env_set(name, buf);
  43 }
  44
  45 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
  46                                  uchar *enetaddr)
  47 {
  48         char enetvar[32];
  49         sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  50         return eth_env_get_enetaddr(enetvar, enetaddr);
  51 }
  52
  53 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
  54                                  uchar *enetaddr)
  55 {
  56         char enetvar[32];
  57         sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  58         return eth_env_set_enetaddr(enetvar, enetaddr);
  59 }
  60
  61 void eth_common_init(void)
  62 {
  63         bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
  64 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
  65         miiphy_init();
  66 #endif
  67
  68 #ifdef CONFIG_PHYLIB
  69         phy_init();
  70 #endif
  71 }
  72
  73 int eth_mac_skip(int index)
  74 {
  75         char enetvar[15];
  76         char *skip_state;
  77
  78         sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  79         skip_state = env_get(enetvar);
  80         return skip_state != NULL;
  81 }
  82
  83 void eth_current_changed(void)
  84 {
  85         char *act = env_get("ethact");
  86         char *ethrotate;
  87
  88         /*
  89          * The call to eth_get_dev() below has a side effect of rotating
  90          * ethernet device if uc_priv->current == NULL. This is not what
  91          * we want when 'ethrotate' variable is 'no'.
  92          */
  93         ethrotate = env_get("ethrotate");
  94         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
  95                 return;
  96
  97         /* update current ethernet name */
  98         if (eth_get_dev()) {
  99                 if (act == NULL || strcmp(act, eth_get_name()) != 0)
 100                         env_set("ethact", eth_get_name());
 101         }
 102         /*
 103          * remove the variable completely if there is no active
 104          * interface
 105          */
 106         else if (act != NULL)
 107                 env_set("ethact", NULL);
 108 }
 109
 110 void eth_try_another(int first_restart)
 111 {
 112         static void *first_failed;
 113         char *ethrotate;
 114
 115         /*
 116          * Do not rotate between network interfaces when
 117          * 'ethrotate' variable is set to 'no'.
 118          */
 119         ethrotate = env_get("ethrotate");
 120         if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
 121                 return;
 122
 123         if (!eth_get_dev())
 124                 return;
 125
 126         if (first_restart)
 127                 first_failed = eth_get_dev();
 128
 129         eth_set_current_to_next();
 130
 131         eth_current_changed();
 132
 133         if (first_failed == eth_get_dev())
 134                 net_restart_wrap = 1;
 135 }
 136
 137 void eth_set_current(void)
 138 {
 139         static char *act;
 140         static int  env_changed_id;
 141         int     env_id;
 142
 143         env_id = get_env_id();
 144         if ((act == NULL) || (env_changed_id != env_id)) {
 145                 act = env_get("ethact");
 146                 env_changed_id = env_id;
 147         }
 148
 149         if (act == NULL) {
 150                 char *ethprime = env_get("ethprime");
 151                 void *dev = NULL;
 152
 153                 if (ethprime)
 154                         dev = eth_get_dev_by_name(ethprime);
 155                 if (dev)
 156                         eth_set_dev(dev);
 157                 else
 158                         eth_set_dev(NULL);
 159         } else {
 160                 eth_set_dev(eth_get_dev_by_name(act));
 161         }
 162
 163         eth_current_changed();
 164 }
 165
 166 const char *eth_get_name(void)
 167 {
 168         return eth_get_dev() ? eth_get_dev()->name : "unknown";
 169 }