net/eth.c

   1 /*
   2  * (C) Copyright 2001, 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <net.h>
  27
  28 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
  29
  30 #ifdef CFG_GT_6426x
  31 extern int gt6426x_eth_initialize(bd_t *bis);
  32 #endif
  33
  34 extern int eepro100_initialize(bd_t*);
  35 extern int natsemi_initialize(bd_t*);
  36 extern int ns8382x_initialize(bd_t*);
  37 extern int dc21x4x_initialize(bd_t*);
  38 extern int eth_3com_initialize(bd_t*);
  39 extern int pcnet_initialize(bd_t*);
  40 extern int fec_initialize(bd_t*);
  41 extern int scc_initialize(bd_t*);
  42 extern int inca_switch_initialize(bd_t*);
  43
  44 static struct eth_device *eth_devices, *eth_current;
  45
  46 struct eth_device *eth_get_dev(void)
  47 {
  48         return eth_current;
  49 }
  50
  51 int eth_get_dev_index (void)
  52 {
  53         struct eth_device *dev;
  54         int num = 0;
  55
  56         if (!eth_devices) {
  57                 return (-1);
  58         }
  59
  60         for (dev = eth_devices; dev; dev = dev->next) {
  61                 if (dev == eth_current)
  62                         break;
  63                 ++num;
  64         }
  65
  66         if (dev) {
  67                 return (num);
  68         }
  69
  70         return (0);
  71 }
  72
  73 int eth_register(struct eth_device* dev)
  74 {
  75         struct eth_device *d;
  76
  77         if (!eth_devices) {
  78                 eth_current = eth_devices = dev;
  79         } else {
  80                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
  81                 d->next = dev;
  82         }
  83
  84         dev->state = ETH_STATE_INIT;
  85         dev->next  = eth_devices;
  86
  87         return 0;
  88 }
  89
  90 int eth_initialize(bd_t *bis)
  91 {
  92         unsigned char enetvar[32], env_enetaddr[6];
  93         int i, eth_number = 0;
  94         char *tmp, *end;
  95
  96         eth_devices = NULL;
  97         eth_current = NULL;
  98
  99 #ifdef CONFIG_INCA_IP_SWITCH
 100         inca_switch_initialize(bis);
 101 #endif
 102 #ifdef CONFIG_EEPRO100
 103         eepro100_initialize(bis);
 104 #endif
 105 #ifdef CONFIG_TULIP
 106         dc21x4x_initialize(bis);
 107 #endif
 108 #ifdef CONFIG_3COM
 109         eth_3com_initialize(bis);
 110 #endif
 111 #ifdef CONFIG_PCNET
 112         pcnet_initialize(bis);
 113 #endif
 114 #ifdef CFG_GT_6426x
 115         gt6426x_eth_initialize(bis);
 116 #endif
 117 #ifdef CONFIG_NATSEMI
 118         natsemi_initialize(bis);
 119 #endif
 120 #ifdef CONFIG_NS8382X
 121         ns8382x_initialize(bis);
 122 #endif
 123 #ifdef SCC_ENET
 124         scc_initialize(bis);
 125 #endif
 126 #if defined(FEC_ENET) || defined(CONFIG_ETHER_ON_FCC)
 127         fec_initialize(bis);
 128 #endif
 129
 130         if (!eth_devices) {
 131                 puts ("No ethernet found.\n");
 132         } else {
 133                 struct eth_device *dev = eth_devices;
 134                 char *ethprime = getenv ("ethprime");
 135
 136                 do {
 137                         if (eth_number)
 138                                 puts (", ");
 139
 140                         printf("%s", dev->name);
 141
 142                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 143                                 eth_current = dev;
 144                                 puts (" [PRIME]");
 145                         }
 146
 147                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 148                         tmp = getenv (enetvar);
 149
 150                         for (i=0; i<6; i++) {
 151                                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
 152                                 if (tmp)
 153                                         tmp = (*end) ? end+1 : end;
 154                         }
 155
 156                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 157                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 158                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 159                                 {
 160                                         printf("\nWarning: %s MAC addresses don't match:\n", dev->name);
 161                                         printf("Address in SROM is         "
 162                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 163                                                dev->enetaddr[0], dev->enetaddr[1],
 164                                                dev->enetaddr[2], dev->enetaddr[3],
 165                                                dev->enetaddr[4], dev->enetaddr[5]);
 166                                         printf("Address in environment is  "
 167                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 168                                                env_enetaddr[0], env_enetaddr[1],
 169                                                env_enetaddr[2], env_enetaddr[3],
 170                                                env_enetaddr[4], env_enetaddr[5]);
 171                                 }
 172
 173                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 174                         }
 175
 176                         eth_number++;
 177                         dev = dev->next;
 178                 } while(dev != eth_devices);
 179
 180                 putc ('\n');
 181         }
 182
 183         return eth_number;
 184 }
 185
 186 void eth_set_enetaddr(int num, char *addr) {
 187         struct eth_device *dev;
 188         unsigned char enetaddr[6];
 189         char *end;
 190         int i;
 191
 192 #ifdef DEBUG
 193         printf("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 194 #endif
 195         if (!eth_devices)
 196                 return;
 197
 198         for (i=0; i<6; i++) {
 199                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 200                 if (addr)
 201                         addr = (*end) ? end+1 : end;
 202         }
 203
 204         dev = eth_devices;
 205         while(num-- > 0) {
 206                 dev = dev->next;
 207
 208                 if (dev == eth_devices)
 209                         return;
 210         }
 211
 212 #ifdef DEBUG
 213         printf("Setting new HW address on %s\n", dev->name);
 214         printf("New Address is             "
 215                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 216                dev->enetaddr[0], dev->enetaddr[1],
 217                dev->enetaddr[2], dev->enetaddr[3],
 218                dev->enetaddr[4], dev->enetaddr[5]);
 219 #endif
 220
 221         memcpy(dev->enetaddr, enetaddr, 6);
 222 }
 223
 224 int eth_init(bd_t *bis)
 225 {
 226         struct eth_device* old_current;
 227
 228         if (!eth_current)
 229                 return 0;
 230
 231         old_current = eth_current;
 232         do {
 233 #ifdef DEBUG
 234                 printf("Trying %s\n", eth_current->name);
 235 #endif
 236
 237                 if (eth_current->init(eth_current, bis)) {
 238                         eth_current->state = ETH_STATE_ACTIVE;
 239
 240                         return 1;
 241                 }
 242
 243 #ifdef DEBUG
 244                 puts ("FAIL\n");
 245 #endif
 246
 247                 eth_try_another(0);
 248         } while (old_current != eth_current);
 249
 250         return 0;
 251 }
 252
 253 void eth_halt(void)
 254 {
 255         if (!eth_current)
 256                 return;
 257
 258         eth_current->halt(eth_current);
 259
 260         eth_current->state = ETH_STATE_PASSIVE;
 261 }
 262
 263 int eth_send(volatile void *packet, int length)
 264 {
 265         if (!eth_current)
 266                 return -1;
 267
 268         return eth_current->send(eth_current, packet, length);
 269 }
 270
 271 int eth_rx(void)
 272 {
 273         if (!eth_current)
 274                 return -1;
 275
 276         return eth_current->recv(eth_current);
 277 }
 278
 279 void eth_try_another(int first_restart)
 280 {
 281         static struct eth_device *first_failed = NULL;
 282
 283         if (!eth_current)
 284                 return;
 285
 286         if (first_restart)
 287         {
 288                 first_failed = eth_current;
 289         }
 290
 291         eth_current = eth_current->next;
 292
 293         if (first_failed == eth_current)
 294         {
 295                 NetRestartWrap = 1;
 296         }
 297 }
 298
 299 #endif