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 pcnet_initialize(bd_t*);
  39 extern int fec_initialize(bd_t*);
  40 extern int scc_initialize(bd_t*);
  41
  42 static struct eth_device *eth_devices, *eth_current;
  43
  44 struct eth_device *eth_get_dev(void)
  45 {
  46         return eth_current;
  47 }
  48
  49 int eth_get_dev_index (void)
  50 {
  51         struct eth_device *dev;
  52         int num = 0;
  53
  54         if (!eth_devices) {
  55                 return (-1);
  56         }
  57
  58         for (dev = eth_devices; dev; dev = dev->next) {
  59                 if (dev == eth_current)
  60                         break;
  61                 ++num;
  62         }
  63
  64         if (dev) {
  65                 return (num);
  66         }
  67
  68         return (0);
  69 }
  70
  71 int eth_register(struct eth_device* dev)
  72 {
  73         struct eth_device *d;
  74
  75         if (!eth_devices) {
  76                 eth_current = eth_devices = dev;
  77         } else {
  78                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
  79                 d->next = dev;
  80         }
  81
  82         dev->state = ETH_STATE_INIT;
  83         dev->next  = eth_devices;
  84
  85         return 0;
  86 }
  87
  88 int eth_initialize(bd_t *bis)
  89 {
  90         unsigned char enetvar[32], env_enetaddr[6];
  91         int i, eth_number = 0;
  92         char *tmp, *end;
  93
  94         eth_devices = NULL;
  95         eth_current = NULL;
  96
  97 #ifdef CONFIG_EEPRO100
  98         eepro100_initialize(bis);
  99 #endif
 100 #ifdef CONFIG_TULIP
 101         dc21x4x_initialize(bis);
 102 #endif
 103 #ifdef CONFIG_PCNET
 104         pcnet_initialize(bis);
 105 #endif
 106 #ifdef CFG_GT_6426x
 107         gt6426x_eth_initialize(bis);
 108 #endif
 109 #ifdef CONFIG_NATSEMI
 110         natsemi_initialize(bis);
 111 #endif
 112 #ifdef CONFIG_NS8382X
 113         ns8382x_initialize(bis);
 114 #endif
 115 #ifdef SCC_ENET
 116         scc_initialize(bis);
 117 #endif
 118 #ifdef FEC_ENET
 119         fec_initialize(bis);
 120 #endif
 121
 122         if (!eth_devices) {
 123                 puts ("No ethernet found.\n");
 124         } else {
 125                 struct eth_device *dev = eth_devices;
 126                 char *ethprime = getenv ("ethprime");
 127
 128                 do {
 129                         if (eth_number)
 130                                 puts (", ");
 131
 132                         printf("%s", dev->name);
 133
 134                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 135                                 eth_current = dev;
 136                                 puts (" [PRIME]");
 137                         }
 138
 139                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 140                         tmp = getenv (enetvar);
 141
 142                         for (i=0; i<6; i++) {
 143                                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
 144                                 if (tmp)
 145                                         tmp = (*end) ? end+1 : end;
 146                         }
 147
 148                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 149                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 150                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 151                                 {
 152                                         printf("\nWarning: %s HW address don't match:\n", dev->name);
 153                                         printf("Address in SROM is         "
 154                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 155                                                dev->enetaddr[0], dev->enetaddr[1],
 156                                                dev->enetaddr[2], dev->enetaddr[3],
 157                                                dev->enetaddr[4], dev->enetaddr[5]);
 158                                         printf("Address in environment is  "
 159                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 160                                                env_enetaddr[0], env_enetaddr[1],
 161                                                env_enetaddr[2], env_enetaddr[3],
 162                                                env_enetaddr[4], env_enetaddr[5]);
 163                                 }
 164
 165                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 166                         }
 167
 168                         eth_number++;
 169                         dev = dev->next;
 170                 } while(dev != eth_devices);
 171
 172                 putc ('\n');
 173         }
 174
 175         return eth_number;
 176 }
 177
 178 void eth_set_enetaddr(int num, char *addr) {
 179         struct eth_device *dev;
 180         unsigned char enetaddr[6];
 181         char *end;
 182         int i;
 183
 184 #ifdef DEBUG
 185         printf("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 186 #endif
 187         if (!eth_devices)
 188                 return;
 189
 190         for (i=0; i<6; i++) {
 191                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 192                 if (addr)
 193                         addr = (*end) ? end+1 : end;
 194         }
 195
 196         dev = eth_devices;
 197         while(num-- > 0) {
 198                 dev = dev->next;
 199
 200                 if (dev == eth_devices)
 201                         return;
 202         }
 203
 204 #ifdef DEBUG
 205         printf("Setting new HW address on %s\n", dev->name);
 206         printf("New Address is             "
 207                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 208                dev->enetaddr[0], dev->enetaddr[1],
 209                dev->enetaddr[2], dev->enetaddr[3],
 210                dev->enetaddr[4], dev->enetaddr[5]);
 211 #endif
 212
 213         memcpy(dev->enetaddr, enetaddr, 6);
 214 }
 215
 216 int eth_init(bd_t *bis)
 217 {
 218         struct eth_device* old_current;
 219
 220         if (!eth_current)
 221                 return 0;
 222
 223         old_current = eth_current;
 224         do {
 225 #ifdef DEBUG
 226                 printf("Trying %s\n", eth_current->name);
 227 #endif
 228
 229                 if (eth_current->init(eth_current, bis)) {
 230                         eth_current->state = ETH_STATE_ACTIVE;
 231
 232                         return 1;
 233                 }
 234
 235 #ifdef DEBUG
 236                 puts ("FAIL\n");
 237 #endif
 238
 239                 eth_try_another(0);
 240         } while (old_current != eth_current);
 241
 242         return 0;
 243 }
 244
 245 void eth_halt(void)
 246 {
 247         if (!eth_current)
 248                 return;
 249
 250         eth_current->halt(eth_current);
 251
 252         eth_current->state = ETH_STATE_PASSIVE;
 253 }
 254
 255 int eth_send(volatile void *packet, int length)
 256 {
 257         if (!eth_current)
 258                 return -1;
 259
 260         return eth_current->send(eth_current, packet, length);
 261 }
 262
 263 int eth_rx(void)
 264 {
 265         if (!eth_current)
 266                 return -1;
 267
 268         return eth_current->recv(eth_current);
 269 }
 270
 271 void eth_try_another(int first_restart)
 272 {
 273         static struct eth_device *first_failed = NULL;
 274
 275         if (!eth_current)
 276                 return;
 277
 278         if (first_restart)
 279         {
 280                 first_failed = eth_current;
 281         }
 282
 283         eth_current = eth_current->next;
 284
 285         if (first_failed == eth_current)
 286         {
 287                 NetRestartWrap = 1;
 288         }
 289 }
 290
 291 #endif