net/eth.c

   1 /*
   2  * (C) Copyright 2001-2004
   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 #include <miiphy.h>
  28
  29 #if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
  30
  31 /*
  32  * CPU and board-specific Ethernet initializations.  Aliased function
  33  * signals caller to move on
  34  */
  35 static int __def_eth_init(bd_t *bis)
  36 {
  37         return -1;
  38 }
  39 int cpu_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
  40 int board_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
  41
  42 extern int mpc8220_fec_initialize(bd_t*);
  43 extern int mv6436x_eth_initialize(bd_t *);
  44 extern int mv6446x_eth_initialize(bd_t *);
  45 extern int ppc_4xx_eth_initialize(bd_t *);
  46 extern int scc_initialize(bd_t*);
  47
  48 #ifdef CONFIG_API
  49 extern void (*push_packet)(volatile void *, int);
  50
  51 static struct {
  52         uchar data[PKTSIZE];
  53         int length;
  54 } eth_rcv_bufs[PKTBUFSRX];
  55
  56 static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
  57 #endif
  58
  59 static struct eth_device *eth_devices, *eth_current;
  60
  61 struct eth_device *eth_get_dev(void)
  62 {
  63         return eth_current;
  64 }
  65
  66 struct eth_device *eth_get_dev_by_name(char *devname)
  67 {
  68         struct eth_device *dev, *target_dev;
  69
  70         if (!eth_devices)
  71                 return NULL;
  72
  73         dev = eth_devices;
  74         target_dev = NULL;
  75         do {
  76                 if (strcmp(devname, dev->name) == 0) {
  77                         target_dev = dev;
  78                         break;
  79                 }
  80                 dev = dev->next;
  81         } while (dev != eth_devices);
  82
  83         return target_dev;
  84 }
  85
  86 int eth_get_dev_index (void)
  87 {
  88         struct eth_device *dev;
  89         int num = 0;
  90
  91         if (!eth_devices) {
  92                 return (-1);
  93         }
  94
  95         for (dev = eth_devices; dev; dev = dev->next) {
  96                 if (dev == eth_current)
  97                         break;
  98                 ++num;
  99         }
 100
 101         if (dev) {
 102                 return (num);
 103         }
 104
 105         return (0);
 106 }
 107
 108 int eth_register(struct eth_device* dev)
 109 {
 110         struct eth_device *d;
 111
 112         if (!eth_devices) {
 113                 eth_current = eth_devices = dev;
 114 #ifdef CONFIG_NET_MULTI
 115                 /* update current ethernet name */
 116                 {
 117                         char *act = getenv("ethact");
 118                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 119                                 setenv("ethact", eth_current->name);
 120                 }
 121 #endif
 122         } else {
 123                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
 124                 d->next = dev;
 125         }
 126
 127         dev->state = ETH_STATE_INIT;
 128         dev->next  = eth_devices;
 129
 130         return 0;
 131 }
 132
 133 int eth_initialize(bd_t *bis)
 134 {
 135         char enetvar[32];
 136         unsigned char env_enetaddr[6];
 137         int i, eth_number = 0;
 138         char *tmp, *end;
 139
 140         eth_devices = NULL;
 141         eth_current = NULL;
 142
 143         show_boot_progress (64);
 144 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 145         miiphy_init();
 146 #endif
 147         /* Try board-specific initialization first.  If it fails or isn't
 148          * present, try the cpu-specific initialization */
 149         if (board_eth_init(bis) < 0)
 150                 cpu_eth_init(bis);
 151
 152 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 153         mv6436x_eth_initialize(bis);
 154 #endif
 155 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 156         mv6446x_eth_initialize(bis);
 157 #endif
 158 #if defined(CONFIG_4xx) && !defined(CONFIG_IOP480) && !defined(CONFIG_AP1000)
 159         ppc_4xx_eth_initialize(bis);
 160 #endif
 161 #ifdef SCC_ENET
 162         scc_initialize(bis);
 163 #endif
 164 #if defined(CONFIG_MPC8220_FEC)
 165         mpc8220_fec_initialize(bis);
 166 #endif
 167         if (!eth_devices) {
 168                 puts ("No ethernet found.\n");
 169                 show_boot_progress (-64);
 170         } else {
 171                 struct eth_device *dev = eth_devices;
 172                 char *ethprime = getenv ("ethprime");
 173
 174                 show_boot_progress (65);
 175                 do {
 176                         if (eth_number)
 177                                 puts (", ");
 178
 179                         printf("%s", dev->name);
 180
 181                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 182                                 eth_current = dev;
 183                                 puts (" [PRIME]");
 184                         }
 185
 186                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 187                         tmp = getenv (enetvar);
 188
 189                         for (i=0; i<6; i++) {
 190                                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
 191                                 if (tmp)
 192                                         tmp = (*end) ? end+1 : end;
 193                         }
 194
 195                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 196                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 197                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 198                                 {
 199                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 200                                                 dev->name);
 201                                         printf ("Address in SROM is         "
 202                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 203                                                dev->enetaddr[0], dev->enetaddr[1],
 204                                                dev->enetaddr[2], dev->enetaddr[3],
 205                                                dev->enetaddr[4], dev->enetaddr[5]);
 206                                         printf ("Address in environment is  "
 207                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 208                                                env_enetaddr[0], env_enetaddr[1],
 209                                                env_enetaddr[2], env_enetaddr[3],
 210                                                env_enetaddr[4], env_enetaddr[5]);
 211                                 }
 212
 213                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 214                         }
 215
 216                         eth_number++;
 217                         dev = dev->next;
 218                 } while(dev != eth_devices);
 219
 220 #ifdef CONFIG_NET_MULTI
 221                 /* update current ethernet name */
 222                 if (eth_current) {
 223                         char *act = getenv("ethact");
 224                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 225                                 setenv("ethact", eth_current->name);
 226                 } else
 227                         setenv("ethact", NULL);
 228 #endif
 229
 230                 putc ('\n');
 231         }
 232
 233         return eth_number;
 234 }
 235
 236 void eth_set_enetaddr(int num, char *addr) {
 237         struct eth_device *dev;
 238         unsigned char enetaddr[6];
 239         char *end;
 240         int i;
 241
 242         debug ("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 243
 244         if (!eth_devices)
 245                 return;
 246
 247         for (i=0; i<6; i++) {
 248                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 249                 if (addr)
 250                         addr = (*end) ? end+1 : end;
 251         }
 252
 253         dev = eth_devices;
 254         while(num-- > 0) {
 255                 dev = dev->next;
 256
 257                 if (dev == eth_devices)
 258                         return;
 259         }
 260
 261         debug ( "Setting new HW address on %s\n"
 262                 "New Address is             %02X:%02X:%02X:%02X:%02X:%02X\n",
 263                 dev->name,
 264                 enetaddr[0], enetaddr[1],
 265                 enetaddr[2], enetaddr[3],
 266                 enetaddr[4], enetaddr[5]);
 267
 268         memcpy(dev->enetaddr, enetaddr, 6);
 269 }
 270 #ifdef CONFIG_MCAST_TFTP
 271 /* Multicast.
 272  * mcast_addr: multicast ipaddr from which multicast Mac is made
 273  * join: 1=join, 0=leave.
 274  */
 275 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 276 {
 277  u8 mcast_mac[6];
 278         if (!eth_current || !eth_current->mcast)
 279                 return -1;
 280         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 281         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 282         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 283         mcast_mac[2] = 0x5e;
 284         mcast_mac[1] = 0x0;
 285         mcast_mac[0] = 0x1;
 286         return eth_current->mcast(eth_current, mcast_mac, join);
 287 }
 288
 289 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 290  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 291  * some other adapter -- hash tables
 292  */
 293 #define CRCPOLY_LE 0xedb88320
 294 u32 ether_crc (size_t len, unsigned char const *p)
 295 {
 296         int i;
 297         u32 crc;
 298         crc = ~0;
 299         while (len--) {
 300                 crc ^= *p++;
 301                 for (i = 0; i < 8; i++)
 302                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 303         }
 304         /* an reverse the bits, cuz of way they arrive -- last-first */
 305         crc = (crc >> 16) | (crc << 16);
 306         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 307         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 308         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 309         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 310         return crc;
 311 }
 312
 313 #endif
 314
 315
 316 int eth_init(bd_t *bis)
 317 {
 318         struct eth_device* old_current;
 319
 320         if (!eth_current) {
 321                 puts ("No ethernet found.\n");
 322                 return -1;
 323         }
 324
 325         old_current = eth_current;
 326         do {
 327                 debug ("Trying %s\n", eth_current->name);
 328
 329                 if (eth_current->init(eth_current,bis) >= 0) {
 330                         eth_current->state = ETH_STATE_ACTIVE;
 331
 332                         return 0;
 333                 }
 334                 debug  ("FAIL\n");
 335
 336                 eth_try_another(0);
 337         } while (old_current != eth_current);
 338
 339         return -1;
 340 }
 341
 342 void eth_halt(void)
 343 {
 344         if (!eth_current)
 345                 return;
 346
 347         eth_current->halt(eth_current);
 348
 349         eth_current->state = ETH_STATE_PASSIVE;
 350 }
 351
 352 int eth_send(volatile void *packet, int length)
 353 {
 354         if (!eth_current)
 355                 return -1;
 356
 357         return eth_current->send(eth_current, packet, length);
 358 }
 359
 360 int eth_rx(void)
 361 {
 362         if (!eth_current)
 363                 return -1;
 364
 365         return eth_current->recv(eth_current);
 366 }
 367
 368 #ifdef CONFIG_API
 369 static void eth_save_packet(volatile void *packet, int length)
 370 {
 371         volatile char *p = packet;
 372         int i;
 373
 374         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 375                 return;
 376
 377         if (PKTSIZE < length)
 378                 return;
 379
 380         for (i = 0; i < length; i++)
 381                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 382
 383         eth_rcv_bufs[eth_rcv_last].length = length;
 384         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 385 }
 386
 387 int eth_receive(volatile void *packet, int length)
 388 {
 389         volatile char *p = packet;
 390         void *pp = push_packet;
 391         int i;
 392
 393         if (eth_rcv_current == eth_rcv_last) {
 394                 push_packet = eth_save_packet;
 395                 eth_rx();
 396                 push_packet = pp;
 397
 398                 if (eth_rcv_current == eth_rcv_last)
 399                         return -1;
 400         }
 401
 402         if (length < eth_rcv_bufs[eth_rcv_current].length)
 403                 return -1;
 404
 405         length = eth_rcv_bufs[eth_rcv_current].length;
 406
 407         for (i = 0; i < length; i++)
 408                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 409
 410         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 411         return length;
 412 }
 413 #endif /* CONFIG_API */
 414
 415 void eth_try_another(int first_restart)
 416 {
 417         static struct eth_device *first_failed = NULL;
 418         char *ethrotate;
 419
 420         /*
 421          * Do not rotate between network interfaces when
 422          * 'ethrotate' variable is set to 'no'.
 423          */
 424         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 425             (strcmp(ethrotate, "no") == 0))
 426                 return;
 427
 428         if (!eth_current)
 429                 return;
 430
 431         if (first_restart) {
 432                 first_failed = eth_current;
 433         }
 434
 435         eth_current = eth_current->next;
 436
 437 #ifdef CONFIG_NET_MULTI
 438         /* update current ethernet name */
 439         {
 440                 char *act = getenv("ethact");
 441                 if (act == NULL || strcmp(act, eth_current->name) != 0)
 442                         setenv("ethact", eth_current->name);
 443         }
 444 #endif
 445
 446         if (first_failed == eth_current) {
 447                 NetRestartWrap = 1;
 448         }
 449 }
 450
 451 #ifdef CONFIG_NET_MULTI
 452 void eth_set_current(void)
 453 {
 454         char *act;
 455         struct eth_device* old_current;
 456
 457         if (!eth_current)       /* XXX no current */
 458                 return;
 459
 460         act = getenv("ethact");
 461         if (act != NULL) {
 462                 old_current = eth_current;
 463                 do {
 464                         if (strcmp(eth_current->name, act) == 0)
 465                                 return;
 466                         eth_current = eth_current->next;
 467                 } while (old_current != eth_current);
 468         }
 469
 470         setenv("ethact", eth_current->name);
 471 }
 472 #endif
 473
 474 char *eth_get_name (void)
 475 {
 476         return (eth_current ? eth_current->name : "unknown");
 477 }
 478 #elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)
 479
 480 extern int at91rm9200_miiphy_initialize(bd_t *bis);
 481 extern int emac4xx_miiphy_initialize(bd_t *bis);
 482 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 483 extern int ns7520_miiphy_initialize(bd_t *bis);
 484 extern int davinci_eth_miiphy_initialize(bd_t *bis);
 485
 486
 487 int eth_initialize(bd_t *bis)
 488 {
 489 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 490         miiphy_init();
 491 #endif
 492
 493 #if defined(CONFIG_AT91RM9200)
 494         at91rm9200_miiphy_initialize(bis);
 495 #endif
 496 #if defined(CONFIG_4xx) && !defined(CONFIG_IOP480) \
 497         && !defined(CONFIG_AP1000) && !defined(CONFIG_405)
 498         emac4xx_miiphy_initialize(bis);
 499 #endif
 500 #if defined(CONFIG_MCF52x2)
 501         mcf52x2_miiphy_initialize(bis);
 502 #endif
 503 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 504         ns7520_miiphy_initialize(bis);
 505 #endif
 506 #if defined(CONFIG_DRIVER_TI_EMAC)
 507         davinci_eth_miiphy_initialize(bis);
 508 #endif
 509         return 0;
 510 }
 511 #endif