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 #ifdef CFG_GT_6426x
  43 extern int gt6426x_eth_initialize(bd_t *bis);
  44 #endif
  45
  46 extern int au1x00_enet_initialize(bd_t*);
  47 extern int dc21x4x_initialize(bd_t*);
  48 extern int e1000_initialize(bd_t*);
  49 extern int eepro100_initialize(bd_t*);
  50 extern int eth_3com_initialize(bd_t*);
  51 extern int fec_initialize(bd_t*);
  52 extern int inca_switch_initialize(bd_t*);
  53 extern int mpc5xxx_fec_initialize(bd_t*);
  54 extern int mpc512x_fec_initialize(bd_t*);
  55 extern int mpc8220_fec_initialize(bd_t*);
  56 extern int mv6436x_eth_initialize(bd_t *);
  57 extern int mv6446x_eth_initialize(bd_t *);
  58 extern int natsemi_initialize(bd_t*);
  59 extern int ns8382x_initialize(bd_t*);
  60 extern int pcnet_initialize(bd_t*);
  61 extern int plb2800_eth_initialize(bd_t*);
  62 extern int ppc_4xx_eth_initialize(bd_t *);
  63 extern int scc_initialize(bd_t*);
  64 extern int npe_initialize(bd_t *);
  65 extern int uec_initialize(int);
  66
  67 #ifdef CONFIG_API
  68 extern void (*push_packet)(volatile void *, int);
  69
  70 static struct {
  71         uchar data[PKTSIZE];
  72         int length;
  73 } eth_rcv_bufs[PKTBUFSRX];
  74
  75 static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
  76 #endif
  77
  78 static struct eth_device *eth_devices, *eth_current;
  79
  80 struct eth_device *eth_get_dev(void)
  81 {
  82         return eth_current;
  83 }
  84
  85 struct eth_device *eth_get_dev_by_name(char *devname)
  86 {
  87         struct eth_device *dev, *target_dev;
  88
  89         if (!eth_devices)
  90                 return NULL;
  91
  92         dev = eth_devices;
  93         target_dev = NULL;
  94         do {
  95                 if (strcmp(devname, dev->name) == 0) {
  96                         target_dev = dev;
  97                         break;
  98                 }
  99                 dev = dev->next;
 100         } while (dev != eth_devices);
 101
 102         return target_dev;
 103 }
 104
 105 int eth_get_dev_index (void)
 106 {
 107         struct eth_device *dev;
 108         int num = 0;
 109
 110         if (!eth_devices) {
 111                 return (-1);
 112         }
 113
 114         for (dev = eth_devices; dev; dev = dev->next) {
 115                 if (dev == eth_current)
 116                         break;
 117                 ++num;
 118         }
 119
 120         if (dev) {
 121                 return (num);
 122         }
 123
 124         return (0);
 125 }
 126
 127 int eth_register(struct eth_device* dev)
 128 {
 129         struct eth_device *d;
 130
 131         if (!eth_devices) {
 132                 eth_current = eth_devices = dev;
 133 #ifdef CONFIG_NET_MULTI
 134                 /* update current ethernet name */
 135                 {
 136                         char *act = getenv("ethact");
 137                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 138                                 setenv("ethact", eth_current->name);
 139                 }
 140 #endif
 141         } else {
 142                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
 143                 d->next = dev;
 144         }
 145
 146         dev->state = ETH_STATE_INIT;
 147         dev->next  = eth_devices;
 148
 149         return 0;
 150 }
 151
 152 int eth_initialize(bd_t *bis)
 153 {
 154         char enetvar[32];
 155         unsigned char env_enetaddr[6];
 156         int i, eth_number = 0;
 157         char *tmp, *end;
 158
 159         eth_devices = NULL;
 160         eth_current = NULL;
 161
 162         show_boot_progress (64);
 163 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 164         miiphy_init();
 165 #endif
 166         /* Try board-specific initialization first.  If it fails or isn't
 167          * present, try the cpu-specific initialization */
 168         if (board_eth_init(bis) < 0)
 169                 cpu_eth_init(bis);
 170
 171 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 172         mv6436x_eth_initialize(bis);
 173 #endif
 174 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 175         mv6446x_eth_initialize(bis);
 176 #endif
 177 #if defined(CONFIG_4xx) && !defined(CONFIG_IOP480) && !defined(CONFIG_AP1000)
 178         ppc_4xx_eth_initialize(bis);
 179 #endif
 180 #ifdef CONFIG_INCA_IP_SWITCH
 181         inca_switch_initialize(bis);
 182 #endif
 183 #ifdef CONFIG_PLB2800_ETHER
 184         plb2800_eth_initialize(bis);
 185 #endif
 186 #ifdef SCC_ENET
 187         scc_initialize(bis);
 188 #endif
 189 #if defined(CONFIG_MPC5xxx_FEC)
 190         mpc5xxx_fec_initialize(bis);
 191 #endif
 192 #if defined(CONFIG_MPC512x_FEC)
 193         mpc512x_fec_initialize (bis);
 194 #endif
 195 #if defined(CONFIG_MPC8220_FEC)
 196         mpc8220_fec_initialize(bis);
 197 #endif
 198 #if defined(CONFIG_UEC_ETH1)
 199         uec_initialize(0);
 200 #endif
 201 #if defined(CONFIG_UEC_ETH2)
 202         uec_initialize(1);
 203 #endif
 204 #if defined(CONFIG_UEC_ETH3)
 205         uec_initialize(2);
 206 #endif
 207 #if defined(CONFIG_UEC_ETH4)
 208         uec_initialize(3);
 209 #endif
 210
 211 #if defined(FEC_ENET) || defined(CONFIG_ETHER_ON_FCC)
 212         fec_initialize(bis);
 213 #endif
 214 #if defined(CONFIG_AU1X00)
 215         au1x00_enet_initialize(bis);
 216 #endif
 217 #if defined(CONFIG_IXP4XX_NPE)
 218         npe_initialize(bis);
 219 #endif
 220 #ifdef CONFIG_E1000
 221         e1000_initialize(bis);
 222 #endif
 223 #ifdef CONFIG_EEPRO100
 224         eepro100_initialize(bis);
 225 #endif
 226 #ifdef CONFIG_TULIP
 227         dc21x4x_initialize(bis);
 228 #endif
 229 #ifdef CONFIG_3COM
 230         eth_3com_initialize(bis);
 231 #endif
 232 #ifdef CONFIG_PCNET
 233         pcnet_initialize(bis);
 234 #endif
 235 #ifdef CFG_GT_6426x
 236         gt6426x_eth_initialize(bis);
 237 #endif
 238 #ifdef CONFIG_NATSEMI
 239         natsemi_initialize(bis);
 240 #endif
 241 #ifdef CONFIG_NS8382X
 242         ns8382x_initialize(bis);
 243 #endif
 244         if (!eth_devices) {
 245                 puts ("No ethernet found.\n");
 246                 show_boot_progress (-64);
 247         } else {
 248                 struct eth_device *dev = eth_devices;
 249                 char *ethprime = getenv ("ethprime");
 250
 251                 show_boot_progress (65);
 252                 do {
 253                         if (eth_number)
 254                                 puts (", ");
 255
 256                         printf("%s", dev->name);
 257
 258                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 259                                 eth_current = dev;
 260                                 puts (" [PRIME]");
 261                         }
 262
 263                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 264                         tmp = getenv (enetvar);
 265
 266                         for (i=0; i<6; i++) {
 267                                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
 268                                 if (tmp)
 269                                         tmp = (*end) ? end+1 : end;
 270                         }
 271
 272                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 273                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 274                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 275                                 {
 276                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 277                                                 dev->name);
 278                                         printf ("Address in SROM is         "
 279                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 280                                                dev->enetaddr[0], dev->enetaddr[1],
 281                                                dev->enetaddr[2], dev->enetaddr[3],
 282                                                dev->enetaddr[4], dev->enetaddr[5]);
 283                                         printf ("Address in environment is  "
 284                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 285                                                env_enetaddr[0], env_enetaddr[1],
 286                                                env_enetaddr[2], env_enetaddr[3],
 287                                                env_enetaddr[4], env_enetaddr[5]);
 288                                 }
 289
 290                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 291                         }
 292
 293                         eth_number++;
 294                         dev = dev->next;
 295                 } while(dev != eth_devices);
 296
 297 #ifdef CONFIG_NET_MULTI
 298                 /* update current ethernet name */
 299                 if (eth_current) {
 300                         char *act = getenv("ethact");
 301                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 302                                 setenv("ethact", eth_current->name);
 303                 } else
 304                         setenv("ethact", NULL);
 305 #endif
 306
 307                 putc ('\n');
 308         }
 309
 310         return eth_number;
 311 }
 312
 313 void eth_set_enetaddr(int num, char *addr) {
 314         struct eth_device *dev;
 315         unsigned char enetaddr[6];
 316         char *end;
 317         int i;
 318
 319         debug ("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 320
 321         if (!eth_devices)
 322                 return;
 323
 324         for (i=0; i<6; i++) {
 325                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 326                 if (addr)
 327                         addr = (*end) ? end+1 : end;
 328         }
 329
 330         dev = eth_devices;
 331         while(num-- > 0) {
 332                 dev = dev->next;
 333
 334                 if (dev == eth_devices)
 335                         return;
 336         }
 337
 338         debug ( "Setting new HW address on %s\n"
 339                 "New Address is             %02X:%02X:%02X:%02X:%02X:%02X\n",
 340                 dev->name,
 341                 enetaddr[0], enetaddr[1],
 342                 enetaddr[2], enetaddr[3],
 343                 enetaddr[4], enetaddr[5]);
 344
 345         memcpy(dev->enetaddr, enetaddr, 6);
 346 }
 347 #ifdef CONFIG_MCAST_TFTP
 348 /* Multicast.
 349  * mcast_addr: multicast ipaddr from which multicast Mac is made
 350  * join: 1=join, 0=leave.
 351  */
 352 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 353 {
 354  u8 mcast_mac[6];
 355         if (!eth_current || !eth_current->mcast)
 356                 return -1;
 357         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 358         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 359         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 360         mcast_mac[2] = 0x5e;
 361         mcast_mac[1] = 0x0;
 362         mcast_mac[0] = 0x1;
 363         return eth_current->mcast(eth_current, mcast_mac, join);
 364 }
 365
 366 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 367  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 368  * some other adapter -- hash tables
 369  */
 370 #define CRCPOLY_LE 0xedb88320
 371 u32 ether_crc (size_t len, unsigned char const *p)
 372 {
 373         int i;
 374         u32 crc;
 375         crc = ~0;
 376         while (len--) {
 377                 crc ^= *p++;
 378                 for (i = 0; i < 8; i++)
 379                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 380         }
 381         /* an reverse the bits, cuz of way they arrive -- last-first */
 382         crc = (crc >> 16) | (crc << 16);
 383         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 384         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 385         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 386         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 387         return crc;
 388 }
 389
 390 #endif
 391
 392
 393 int eth_init(bd_t *bis)
 394 {
 395         struct eth_device* old_current;
 396
 397         if (!eth_current) {
 398                 puts ("No ethernet found.\n");
 399                 return -1;
 400         }
 401
 402         old_current = eth_current;
 403         do {
 404                 debug ("Trying %s\n", eth_current->name);
 405
 406                 if (eth_current->init(eth_current,bis) >= 0) {
 407                         eth_current->state = ETH_STATE_ACTIVE;
 408
 409                         return 0;
 410                 }
 411                 debug  ("FAIL\n");
 412
 413                 eth_try_another(0);
 414         } while (old_current != eth_current);
 415
 416         return -1;
 417 }
 418
 419 void eth_halt(void)
 420 {
 421         if (!eth_current)
 422                 return;
 423
 424         eth_current->halt(eth_current);
 425
 426         eth_current->state = ETH_STATE_PASSIVE;
 427 }
 428
 429 int eth_send(volatile void *packet, int length)
 430 {
 431         if (!eth_current)
 432                 return -1;
 433
 434         return eth_current->send(eth_current, packet, length);
 435 }
 436
 437 int eth_rx(void)
 438 {
 439         if (!eth_current)
 440                 return -1;
 441
 442         return eth_current->recv(eth_current);
 443 }
 444
 445 #ifdef CONFIG_API
 446 static void eth_save_packet(volatile void *packet, int length)
 447 {
 448         volatile char *p = packet;
 449         int i;
 450
 451         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 452                 return;
 453
 454         if (PKTSIZE < length)
 455                 return;
 456
 457         for (i = 0; i < length; i++)
 458                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 459
 460         eth_rcv_bufs[eth_rcv_last].length = length;
 461         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 462 }
 463
 464 int eth_receive(volatile void *packet, int length)
 465 {
 466         volatile char *p = packet;
 467         void *pp = push_packet;
 468         int i;
 469
 470         if (eth_rcv_current == eth_rcv_last) {
 471                 push_packet = eth_save_packet;
 472                 eth_rx();
 473                 push_packet = pp;
 474
 475                 if (eth_rcv_current == eth_rcv_last)
 476                         return -1;
 477         }
 478
 479         if (length < eth_rcv_bufs[eth_rcv_current].length)
 480                 return -1;
 481
 482         length = eth_rcv_bufs[eth_rcv_current].length;
 483
 484         for (i = 0; i < length; i++)
 485                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 486
 487         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 488         return length;
 489 }
 490 #endif /* CONFIG_API */
 491
 492 void eth_try_another(int first_restart)
 493 {
 494         static struct eth_device *first_failed = NULL;
 495         char *ethrotate;
 496
 497         /*
 498          * Do not rotate between network interfaces when
 499          * 'ethrotate' variable is set to 'no'.
 500          */
 501         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 502             (strcmp(ethrotate, "no") == 0))
 503                 return;
 504
 505         if (!eth_current)
 506                 return;
 507
 508         if (first_restart) {
 509                 first_failed = eth_current;
 510         }
 511
 512         eth_current = eth_current->next;
 513
 514 #ifdef CONFIG_NET_MULTI
 515         /* update current ethernet name */
 516         {
 517                 char *act = getenv("ethact");
 518                 if (act == NULL || strcmp(act, eth_current->name) != 0)
 519                         setenv("ethact", eth_current->name);
 520         }
 521 #endif
 522
 523         if (first_failed == eth_current) {
 524                 NetRestartWrap = 1;
 525         }
 526 }
 527
 528 #ifdef CONFIG_NET_MULTI
 529 void eth_set_current(void)
 530 {
 531         char *act;
 532         struct eth_device* old_current;
 533
 534         if (!eth_current)       /* XXX no current */
 535                 return;
 536
 537         act = getenv("ethact");
 538         if (act != NULL) {
 539                 old_current = eth_current;
 540                 do {
 541                         if (strcmp(eth_current->name, act) == 0)
 542                                 return;
 543                         eth_current = eth_current->next;
 544                 } while (old_current != eth_current);
 545         }
 546
 547         setenv("ethact", eth_current->name);
 548 }
 549 #endif
 550
 551 char *eth_get_name (void)
 552 {
 553         return (eth_current ? eth_current->name : "unknown");
 554 }
 555 #elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)
 556
 557 extern int at91rm9200_miiphy_initialize(bd_t *bis);
 558 extern int emac4xx_miiphy_initialize(bd_t *bis);
 559 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 560 extern int ns7520_miiphy_initialize(bd_t *bis);
 561 extern int davinci_eth_miiphy_initialize(bd_t *bis);
 562
 563
 564 int eth_initialize(bd_t *bis)
 565 {
 566 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 567         miiphy_init();
 568 #endif
 569
 570 #if defined(CONFIG_AT91RM9200)
 571         at91rm9200_miiphy_initialize(bis);
 572 #endif
 573 #if defined(CONFIG_4xx) && !defined(CONFIG_IOP480) \
 574         && !defined(CONFIG_AP1000) && !defined(CONFIG_405)
 575         emac4xx_miiphy_initialize(bis);
 576 #endif
 577 #if defined(CONFIG_MCF52x2)
 578         mcf52x2_miiphy_initialize(bis);
 579 #endif
 580 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 581         ns7520_miiphy_initialize(bis);
 582 #endif
 583 #if defined(CONFIG_DRIVER_TI_EMAC)
 584         davinci_eth_miiphy_initialize(bis);
 585 #endif
 586         return 0;
 587 }
 588 #endif