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 rtl8139_initialize(bd_t*);
  64 extern int scc_initialize(bd_t*);
  65 extern int tsi108_eth_initialize(bd_t*);
  66 extern int npe_initialize(bd_t *);
  67 extern int uec_initialize(int);
  68
  69 #ifdef CONFIG_API
  70 extern void (*push_packet)(volatile void *, int);
  71
  72 static struct {
  73         uchar data[PKTSIZE];
  74         int length;
  75 } eth_rcv_bufs[PKTBUFSRX];
  76
  77 static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
  78 #endif
  79
  80 static struct eth_device *eth_devices, *eth_current;
  81
  82 struct eth_device *eth_get_dev(void)
  83 {
  84         return eth_current;
  85 }
  86
  87 struct eth_device *eth_get_dev_by_name(char *devname)
  88 {
  89         struct eth_device *dev, *target_dev;
  90
  91         if (!eth_devices)
  92                 return NULL;
  93
  94         dev = eth_devices;
  95         target_dev = NULL;
  96         do {
  97                 if (strcmp(devname, dev->name) == 0) {
  98                         target_dev = dev;
  99                         break;
 100                 }
 101                 dev = dev->next;
 102         } while (dev != eth_devices);
 103
 104         return target_dev;
 105 }
 106
 107 int eth_get_dev_index (void)
 108 {
 109         struct eth_device *dev;
 110         int num = 0;
 111
 112         if (!eth_devices) {
 113                 return (-1);
 114         }
 115
 116         for (dev = eth_devices; dev; dev = dev->next) {
 117                 if (dev == eth_current)
 118                         break;
 119                 ++num;
 120         }
 121
 122         if (dev) {
 123                 return (num);
 124         }
 125
 126         return (0);
 127 }
 128
 129 int eth_register(struct eth_device* dev)
 130 {
 131         struct eth_device *d;
 132
 133         if (!eth_devices) {
 134                 eth_current = eth_devices = dev;
 135 #ifdef CONFIG_NET_MULTI
 136                 /* update current ethernet name */
 137                 {
 138                         char *act = getenv("ethact");
 139                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 140                                 setenv("ethact", eth_current->name);
 141                 }
 142 #endif
 143         } else {
 144                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
 145                 d->next = dev;
 146         }
 147
 148         dev->state = ETH_STATE_INIT;
 149         dev->next  = eth_devices;
 150
 151         return 0;
 152 }
 153
 154 int eth_initialize(bd_t *bis)
 155 {
 156         char enetvar[32];
 157         unsigned char env_enetaddr[6];
 158         int i, eth_number = 0;
 159         char *tmp, *end;
 160
 161         eth_devices = NULL;
 162         eth_current = NULL;
 163
 164         show_boot_progress (64);
 165 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 166         miiphy_init();
 167 #endif
 168         /* Try board-specific initialization first.  If it fails or isn't
 169          * present, try the cpu-specific initialization */
 170         if (board_eth_init(bis) < 0)
 171                 cpu_eth_init(bis);
 172
 173 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 174         mv6436x_eth_initialize(bis);
 175 #endif
 176 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 177         mv6446x_eth_initialize(bis);
 178 #endif
 179 #if defined(CONFIG_4xx) && !defined(CONFIG_IOP480) && !defined(CONFIG_AP1000)
 180         ppc_4xx_eth_initialize(bis);
 181 #endif
 182 #ifdef CONFIG_INCA_IP_SWITCH
 183         inca_switch_initialize(bis);
 184 #endif
 185 #ifdef CONFIG_PLB2800_ETHER
 186         plb2800_eth_initialize(bis);
 187 #endif
 188 #ifdef SCC_ENET
 189         scc_initialize(bis);
 190 #endif
 191 #if defined(CONFIG_MPC5xxx_FEC)
 192         mpc5xxx_fec_initialize(bis);
 193 #endif
 194 #if defined(CONFIG_MPC512x_FEC)
 195         mpc512x_fec_initialize (bis);
 196 #endif
 197 #if defined(CONFIG_MPC8220_FEC)
 198         mpc8220_fec_initialize(bis);
 199 #endif
 200 #if defined(CONFIG_UEC_ETH1)
 201         uec_initialize(0);
 202 #endif
 203 #if defined(CONFIG_UEC_ETH2)
 204         uec_initialize(1);
 205 #endif
 206 #if defined(CONFIG_UEC_ETH3)
 207         uec_initialize(2);
 208 #endif
 209 #if defined(CONFIG_UEC_ETH4)
 210         uec_initialize(3);
 211 #endif
 212
 213 #if defined(FEC_ENET) || defined(CONFIG_ETHER_ON_FCC)
 214         fec_initialize(bis);
 215 #endif
 216 #if defined(CONFIG_AU1X00)
 217         au1x00_enet_initialize(bis);
 218 #endif
 219 #if defined(CONFIG_IXP4XX_NPE)
 220         npe_initialize(bis);
 221 #endif
 222 #ifdef CONFIG_E1000
 223         e1000_initialize(bis);
 224 #endif
 225 #ifdef CONFIG_EEPRO100
 226         eepro100_initialize(bis);
 227 #endif
 228 #ifdef CONFIG_TULIP
 229         dc21x4x_initialize(bis);
 230 #endif
 231 #ifdef CONFIG_3COM
 232         eth_3com_initialize(bis);
 233 #endif
 234 #ifdef CONFIG_PCNET
 235         pcnet_initialize(bis);
 236 #endif
 237 #ifdef CFG_GT_6426x
 238         gt6426x_eth_initialize(bis);
 239 #endif
 240 #ifdef CONFIG_NATSEMI
 241         natsemi_initialize(bis);
 242 #endif
 243 #ifdef CONFIG_NS8382X
 244         ns8382x_initialize(bis);
 245 #endif
 246 #if defined(CONFIG_TSI108_ETH)
 247         tsi108_eth_initialize(bis);
 248 #endif
 249 #if defined(CONFIG_RTL8139)
 250         rtl8139_initialize(bis);
 251 #endif
 252         if (!eth_devices) {
 253                 puts ("No ethernet found.\n");
 254                 show_boot_progress (-64);
 255         } else {
 256                 struct eth_device *dev = eth_devices;
 257                 char *ethprime = getenv ("ethprime");
 258
 259                 show_boot_progress (65);
 260                 do {
 261                         if (eth_number)
 262                                 puts (", ");
 263
 264                         printf("%s", dev->name);
 265
 266                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 267                                 eth_current = dev;
 268                                 puts (" [PRIME]");
 269                         }
 270
 271                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 272                         tmp = getenv (enetvar);
 273
 274                         for (i=0; i<6; i++) {
 275                                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
 276                                 if (tmp)
 277                                         tmp = (*end) ? end+1 : end;
 278                         }
 279
 280                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 281                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 282                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 283                                 {
 284                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 285                                                 dev->name);
 286                                         printf ("Address in SROM is         "
 287                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 288                                                dev->enetaddr[0], dev->enetaddr[1],
 289                                                dev->enetaddr[2], dev->enetaddr[3],
 290                                                dev->enetaddr[4], dev->enetaddr[5]);
 291                                         printf ("Address in environment is  "
 292                                                "%02X:%02X:%02X:%02X:%02X:%02X\n",
 293                                                env_enetaddr[0], env_enetaddr[1],
 294                                                env_enetaddr[2], env_enetaddr[3],
 295                                                env_enetaddr[4], env_enetaddr[5]);
 296                                 }
 297
 298                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 299                         }
 300
 301                         eth_number++;
 302                         dev = dev->next;
 303                 } while(dev != eth_devices);
 304
 305 #ifdef CONFIG_NET_MULTI
 306                 /* update current ethernet name */
 307                 if (eth_current) {
 308                         char *act = getenv("ethact");
 309                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 310                                 setenv("ethact", eth_current->name);
 311                 } else
 312                         setenv("ethact", NULL);
 313 #endif
 314
 315                 putc ('\n');
 316         }
 317
 318         return eth_number;
 319 }
 320
 321 void eth_set_enetaddr(int num, char *addr) {
 322         struct eth_device *dev;
 323         unsigned char enetaddr[6];
 324         char *end;
 325         int i;
 326
 327         debug ("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 328
 329         if (!eth_devices)
 330                 return;
 331
 332         for (i=0; i<6; i++) {
 333                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 334                 if (addr)
 335                         addr = (*end) ? end+1 : end;
 336         }
 337
 338         dev = eth_devices;
 339         while(num-- > 0) {
 340                 dev = dev->next;
 341
 342                 if (dev == eth_devices)
 343                         return;
 344         }
 345
 346         debug ( "Setting new HW address on %s\n"
 347                 "New Address is             %02X:%02X:%02X:%02X:%02X:%02X\n",
 348                 dev->name,
 349                 enetaddr[0], enetaddr[1],
 350                 enetaddr[2], enetaddr[3],
 351                 enetaddr[4], enetaddr[5]);
 352
 353         memcpy(dev->enetaddr, enetaddr, 6);
 354 }
 355 #ifdef CONFIG_MCAST_TFTP
 356 /* Multicast.
 357  * mcast_addr: multicast ipaddr from which multicast Mac is made
 358  * join: 1=join, 0=leave.
 359  */
 360 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 361 {
 362  u8 mcast_mac[6];
 363         if (!eth_current || !eth_current->mcast)
 364                 return -1;
 365         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 366         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 367         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 368         mcast_mac[2] = 0x5e;
 369         mcast_mac[1] = 0x0;
 370         mcast_mac[0] = 0x1;
 371         return eth_current->mcast(eth_current, mcast_mac, join);
 372 }
 373
 374 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 375  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 376  * some other adapter -- hash tables
 377  */
 378 #define CRCPOLY_LE 0xedb88320
 379 u32 ether_crc (size_t len, unsigned char const *p)
 380 {
 381         int i;
 382         u32 crc;
 383         crc = ~0;
 384         while (len--) {
 385                 crc ^= *p++;
 386                 for (i = 0; i < 8; i++)
 387                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 388         }
 389         /* an reverse the bits, cuz of way they arrive -- last-first */
 390         crc = (crc >> 16) | (crc << 16);
 391         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 392         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 393         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 394         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 395         return crc;
 396 }
 397
 398 #endif
 399
 400
 401 int eth_init(bd_t *bis)
 402 {
 403         struct eth_device* old_current;
 404
 405         if (!eth_current) {
 406                 puts ("No ethernet found.\n");
 407                 return -1;
 408         }
 409
 410         old_current = eth_current;
 411         do {
 412                 debug ("Trying %s\n", eth_current->name);
 413
 414                 if (eth_current->init(eth_current,bis) >= 0) {
 415                         eth_current->state = ETH_STATE_ACTIVE;
 416
 417                         return 0;
 418                 }
 419                 debug  ("FAIL\n");
 420
 421                 eth_try_another(0);
 422         } while (old_current != eth_current);
 423
 424         return -1;
 425 }
 426
 427 void eth_halt(void)
 428 {
 429         if (!eth_current)
 430                 return;
 431
 432         eth_current->halt(eth_current);
 433
 434         eth_current->state = ETH_STATE_PASSIVE;
 435 }
 436
 437 int eth_send(volatile void *packet, int length)
 438 {
 439         if (!eth_current)
 440                 return -1;
 441
 442         return eth_current->send(eth_current, packet, length);
 443 }
 444
 445 int eth_rx(void)
 446 {
 447         if (!eth_current)
 448                 return -1;
 449
 450         return eth_current->recv(eth_current);
 451 }
 452
 453 #ifdef CONFIG_API
 454 static void eth_save_packet(volatile void *packet, int length)
 455 {
 456         volatile char *p = packet;
 457         int i;
 458
 459         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 460                 return;
 461
 462         if (PKTSIZE < length)
 463                 return;
 464
 465         for (i = 0; i < length; i++)
 466                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 467
 468         eth_rcv_bufs[eth_rcv_last].length = length;
 469         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 470 }
 471
 472 int eth_receive(volatile void *packet, int length)
 473 {
 474         volatile char *p = packet;
 475         void *pp = push_packet;
 476         int i;
 477
 478         if (eth_rcv_current == eth_rcv_last) {
 479                 push_packet = eth_save_packet;
 480                 eth_rx();
 481                 push_packet = pp;
 482
 483                 if (eth_rcv_current == eth_rcv_last)
 484                         return -1;
 485         }
 486
 487         if (length < eth_rcv_bufs[eth_rcv_current].length)
 488                 return -1;
 489
 490         length = eth_rcv_bufs[eth_rcv_current].length;
 491
 492         for (i = 0; i < length; i++)
 493                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 494
 495         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 496         return length;
 497 }
 498 #endif /* CONFIG_API */
 499
 500 void eth_try_another(int first_restart)
 501 {
 502         static struct eth_device *first_failed = NULL;
 503         char *ethrotate;
 504
 505         /*
 506          * Do not rotate between network interfaces when
 507          * 'ethrotate' variable is set to 'no'.
 508          */
 509         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 510             (strcmp(ethrotate, "no") == 0))
 511                 return;
 512
 513         if (!eth_current)
 514                 return;
 515
 516         if (first_restart) {
 517                 first_failed = eth_current;
 518         }
 519
 520         eth_current = eth_current->next;
 521
 522 #ifdef CONFIG_NET_MULTI
 523         /* update current ethernet name */
 524         {
 525                 char *act = getenv("ethact");
 526                 if (act == NULL || strcmp(act, eth_current->name) != 0)
 527                         setenv("ethact", eth_current->name);
 528         }
 529 #endif
 530
 531         if (first_failed == eth_current) {
 532                 NetRestartWrap = 1;
 533         }
 534 }
 535
 536 #ifdef CONFIG_NET_MULTI
 537 void eth_set_current(void)
 538 {
 539         char *act;
 540         struct eth_device* old_current;
 541
 542         if (!eth_current)       /* XXX no current */
 543                 return;
 544
 545         act = getenv("ethact");
 546         if (act != NULL) {
 547                 old_current = eth_current;
 548                 do {
 549                         if (strcmp(eth_current->name, act) == 0)
 550                                 return;
 551                         eth_current = eth_current->next;
 552                 } while (old_current != eth_current);
 553         }
 554
 555         setenv("ethact", eth_current->name);
 556 }
 557 #endif
 558
 559 char *eth_get_name (void)
 560 {
 561         return (eth_current ? eth_current->name : "unknown");
 562 }
 563 #elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)
 564
 565 extern int at91rm9200_miiphy_initialize(bd_t *bis);
 566 extern int emac4xx_miiphy_initialize(bd_t *bis);
 567 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 568 extern int ns7520_miiphy_initialize(bd_t *bis);
 569 extern int davinci_eth_miiphy_initialize(bd_t *bis);
 570
 571
 572 int eth_initialize(bd_t *bis)
 573 {
 574 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 575         miiphy_init();
 576 #endif
 577
 578 #if defined(CONFIG_AT91RM9200)
 579         at91rm9200_miiphy_initialize(bis);
 580 #endif
 581 #if defined(CONFIG_4xx) && !defined(CONFIG_IOP480) \
 582         && !defined(CONFIG_AP1000) && !defined(CONFIG_405)
 583         emac4xx_miiphy_initialize(bis);
 584 #endif
 585 #if defined(CONFIG_MCF52x2)
 586         mcf52x2_miiphy_initialize(bis);
 587 #endif
 588 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 589         ns7520_miiphy_initialize(bis);
 590 #endif
 591 #if defined(CONFIG_DRIVER_TI_EMAC)
 592         davinci_eth_miiphy_initialize(bis);
 593 #endif
 594         return 0;
 595 }
 596 #endif