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
  43 static struct eth_device *eth_devices, *eth_current;
  44
  45 struct eth_device *eth_get_dev(void)
  46 {
  47         return eth_current;
  48 }
  49
  50 int eth_get_dev_index (void)
  51 {
  52         struct eth_device *dev;
  53         int num = 0;
  54
  55         if (!eth_devices) {
  56                 return (-1);
  57         }
  58
  59         for (dev = eth_devices; dev; dev = dev->next) {
  60                 if (dev == eth_current)
  61                         break;
  62                 ++num;
  63         }
  64
  65         if (dev) {
  66                 return (num);
  67         }
  68
  69         return (0);
  70 }
  71
  72 int eth_register(struct eth_device* dev)
  73 {
  74         struct eth_device *d;
  75
  76         if (!eth_devices) {
  77                 eth_current = eth_devices = dev;
  78         } else {
  79                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
  80                 d->next = dev;
  81         }
  82
  83         dev->state = ETH_STATE_INIT;
  84         dev->next  = eth_devices;
  85
  86         return 0;
  87 }
  88
  89 int eth_initialize(bd_t *bis)
  90 {
  91         unsigned char enetvar[32], env_enetaddr[6];
  92         int i, eth_number = 0;
  93         char *tmp, *end;
  94
  95         eth_devices = NULL;
  96         eth_current = NULL;
  97
  98 #ifdef CONFIG_EEPRO100
  99         eepro100_initialize(bis);
 100 #endif
 101 #ifdef CONFIG_TULIP
 102         dc21x4x_initialize(bis);
 103 #endif
 104 #ifdef CONFIG_3COM
 105         eth_3com_initialize(bis);
 106 #endif
 107 #ifdef CONFIG_PCNET
 108         pcnet_initialize(bis);
 109 #endif
 110 #ifdef CFG_GT_6426x
 111         gt6426x_eth_initialize(bis);
 112 #endif
 113 #ifdef CONFIG_NATSEMI
 114         natsemi_initialize(bis);
 115 #endif
 116 #ifdef CONFIG_NS8382X
 117         ns8382x_initialize(bis);
 118 #endif
 119 #ifdef SCC_ENET
 120         scc_initialize(bis);
 121 #endif
 122 #ifdef FEC_ENET
 123         fec_initialize(bis);
 124 #endif
 125
 126         if (!eth_devices) {
 127                 puts ("No ethernet found.\n");
 128         } else {
 129                 struct eth_device *dev = eth_devices;
 130                 char *ethprime = getenv ("ethprime");
 131
 132                 do {
 133                         if (eth_number)
 134                                 puts (", ");
 135
 136                         printf("%s", dev->name);
 137
 138                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 139                                 eth_current = dev;
 140                                 puts (" [PRIME]");
 141                         }
 142
 143                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 144                         tmp = getenv (enetvar);
 145
 146                         for (i=0; i<6; i++) {
 147                                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
 148                                 if (tmp)
 149                                         tmp = (*end) ? end+1 : end;
 150                         }
 151
 152                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 153                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 154                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 155                                 {
 156                                         printf("\nWarning: %s HW address don't match:\n", dev->name);
 157                                         printf("Address in SROM is         "
 158                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 159                                                dev->enetaddr[0], dev->enetaddr[1],
 160                                                dev->enetaddr[2], dev->enetaddr[3],
 161                                                dev->enetaddr[4], dev->enetaddr[5]);
 162                                         printf("Address in environment is  "
 163                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 164                                                env_enetaddr[0], env_enetaddr[1],
 165                                                env_enetaddr[2], env_enetaddr[3],
 166                                                env_enetaddr[4], env_enetaddr[5]);
 167                                 }
 168
 169                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 170                         }
 171
 172                         eth_number++;
 173                         dev = dev->next;
 174                 } while(dev != eth_devices);
 175
 176                 putc ('\n');
 177         }
 178
 179         return eth_number;
 180 }
 181
 182 void eth_set_enetaddr(int num, char *addr) {
 183         struct eth_device *dev;
 184         unsigned char enetaddr[6];
 185         char *end;
 186         int i;
 187
 188 #ifdef DEBUG
 189         printf("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 190 #endif
 191         if (!eth_devices)
 192                 return;
 193
 194         for (i=0; i<6; i++) {
 195                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 196                 if (addr)
 197                         addr = (*end) ? end+1 : end;
 198         }
 199
 200         dev = eth_devices;
 201         while(num-- > 0) {
 202                 dev = dev->next;
 203
 204                 if (dev == eth_devices)
 205                         return;
 206         }
 207
 208 #ifdef DEBUG
 209         printf("Setting new HW address on %s\n", dev->name);
 210         printf("New Address is             "
 211                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 212                dev->enetaddr[0], dev->enetaddr[1],
 213                dev->enetaddr[2], dev->enetaddr[3],
 214                dev->enetaddr[4], dev->enetaddr[5]);
 215 #endif
 216
 217         memcpy(dev->enetaddr, enetaddr, 6);
 218 }
 219
 220 int eth_init(bd_t *bis)
 221 {
 222         struct eth_device* old_current;
 223
 224         if (!eth_current)
 225                 return 0;
 226
 227         old_current = eth_current;
 228         do {
 229 #ifdef DEBUG
 230                 printf("Trying %s\n", eth_current->name);
 231 #endif
 232
 233                 if (eth_current->init(eth_current, bis)) {
 234                         eth_current->state = ETH_STATE_ACTIVE;
 235
 236                         return 1;
 237                 }
 238
 239 #ifdef DEBUG
 240                 puts ("FAIL\n");
 241 #endif
 242
 243                 eth_try_another(0);
 244         } while (old_current != eth_current);
 245
 246         return 0;
 247 }
 248
 249 void eth_halt(void)
 250 {
 251         if (!eth_current)
 252                 return;
 253
 254         eth_current->halt(eth_current);
 255
 256         eth_current->state = ETH_STATE_PASSIVE;
 257 }
 258
 259 int eth_send(volatile void *packet, int length)
 260 {
 261         if (!eth_current)
 262                 return -1;
 263
 264         return eth_current->send(eth_current, packet, length);
 265 }
 266
 267 int eth_rx(void)
 268 {
 269         if (!eth_current)
 270                 return -1;
 271
 272         return eth_current->recv(eth_current);
 273 }
 274
 275 void eth_try_another(int first_restart)
 276 {
 277         static struct eth_device *first_failed = NULL;
 278
 279         if (!eth_current)
 280                 return;
 281
 282         if (first_restart)
 283         {
 284                 first_failed = eth_current;
 285         }
 286
 287         eth_current = eth_current->next;
 288
 289         if (first_failed == eth_current)
 290         {
 291                 NetRestartWrap = 1;
 292         }
 293 }
 294
 295 #endif