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 #ifdef CONFIG_CMD_NET
  30 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
  31 {
  32         char *end;
  33         int i;
  34
  35         for (i = 0; i < 6; ++i) {
  36                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
  37                 if (addr)
  38                         addr = (*end) ? end + 1 : end;
  39         }
  40 }
  41
  42 int eth_getenv_enetaddr(char *name, uchar *enetaddr)
  43 {
  44         eth_parse_enetaddr(getenv(name), enetaddr);
  45         return is_valid_ether_addr(enetaddr);
  46 }
  47
  48 int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
  49 {
  50         char buf[20];
  51
  52         sprintf(buf, "%pM", enetaddr);
  53
  54         return setenv(name, buf);
  55 }
  56 #endif
  57
  58 #if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
  59
  60 static char *act = NULL;
  61 static int  env_changed_id = 0;
  62
  63 /*
  64  * CPU and board-specific Ethernet initializations.  Aliased function
  65  * signals caller to move on
  66  */
  67 static int __def_eth_init(bd_t *bis)
  68 {
  69         return -1;
  70 }
  71 int cpu_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
  72 int board_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
  73
  74 extern int mv6436x_eth_initialize(bd_t *);
  75 extern int mv6446x_eth_initialize(bd_t *);
  76
  77 #ifdef CONFIG_API
  78 extern void (*push_packet)(volatile void *, int);
  79
  80 static struct {
  81         uchar data[PKTSIZE];
  82         int length;
  83 } eth_rcv_bufs[PKTBUFSRX];
  84
  85 static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
  86 #endif
  87
  88 static struct eth_device *eth_devices, *eth_current;
  89
  90 struct eth_device *eth_get_dev(void)
  91 {
  92         return eth_current;
  93 }
  94
  95 struct eth_device *eth_get_dev_by_name(char *devname)
  96 {
  97         struct eth_device *dev, *target_dev;
  98
  99         if (!eth_devices)
 100                 return NULL;
 101
 102         dev = eth_devices;
 103         target_dev = NULL;
 104         do {
 105                 if (strcmp(devname, dev->name) == 0) {
 106                         target_dev = dev;
 107                         break;
 108                 }
 109                 dev = dev->next;
 110         } while (dev != eth_devices);
 111
 112         return target_dev;
 113 }
 114
 115 struct eth_device *eth_get_dev_by_index(int index)
 116 {
 117         struct eth_device *dev, *target_dev;
 118         int idx = 0;
 119
 120         if (!eth_devices)
 121                 return NULL;
 122
 123         dev = eth_devices;
 124         target_dev = NULL;
 125         do {
 126                 if (idx == index) {
 127                         target_dev = dev;
 128                         break;
 129                 }
 130                 dev = dev->next;
 131                 idx++;
 132         } while (dev != eth_devices);
 133
 134         return target_dev;
 135 }
 136
 137 int eth_get_dev_index (void)
 138 {
 139         struct eth_device *dev;
 140         int num = 0;
 141
 142         if (!eth_devices) {
 143                 return (-1);
 144         }
 145
 146         for (dev = eth_devices; dev; dev = dev->next) {
 147                 if (dev == eth_current)
 148                         break;
 149                 ++num;
 150         }
 151
 152         if (dev) {
 153                 return (num);
 154         }
 155
 156         return (0);
 157 }
 158
 159 int eth_register(struct eth_device* dev)
 160 {
 161         struct eth_device *d;
 162
 163         if (!eth_devices) {
 164                 eth_current = eth_devices = dev;
 165 #ifdef CONFIG_NET_MULTI
 166                 /* update current ethernet name */
 167                 {
 168                         char *act = getenv("ethact");
 169                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 170                                 setenv("ethact", eth_current->name);
 171                 }
 172 #endif
 173         } else {
 174                 for (d=eth_devices; d->next!=eth_devices; d=d->next);
 175                 d->next = dev;
 176         }
 177
 178         dev->state = ETH_STATE_INIT;
 179         dev->next  = eth_devices;
 180
 181         return 0;
 182 }
 183
 184 int eth_initialize(bd_t *bis)
 185 {
 186         char enetvar[32];
 187         unsigned char env_enetaddr[6];
 188         int eth_number = 0;
 189
 190         eth_devices = NULL;
 191         eth_current = NULL;
 192
 193         show_boot_progress (64);
 194 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 195         miiphy_init();
 196 #endif
 197         /* Try board-specific initialization first.  If it fails or isn't
 198          * present, try the cpu-specific initialization */
 199         if (board_eth_init(bis) < 0)
 200                 cpu_eth_init(bis);
 201
 202 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 203         mv6436x_eth_initialize(bis);
 204 #endif
 205 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 206         mv6446x_eth_initialize(bis);
 207 #endif
 208         if (!eth_devices) {
 209                 puts ("No ethernet found.\n");
 210                 show_boot_progress (-64);
 211         } else {
 212                 struct eth_device *dev = eth_devices;
 213                 char *ethprime = getenv ("ethprime");
 214
 215                 show_boot_progress (65);
 216                 do {
 217                         if (eth_number)
 218                                 puts (", ");
 219
 220                         printf("%s", dev->name);
 221
 222                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 223                                 eth_current = dev;
 224                                 puts (" [PRIME]");
 225                         }
 226
 227                         sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
 228                         eth_getenv_enetaddr(enetvar, env_enetaddr);
 229
 230                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 231                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 232                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 233                                 {
 234                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 235                                                 dev->name);
 236                                         printf ("Address in SROM is         %pM\n",
 237                                                 dev->enetaddr);
 238                                         printf ("Address in environment is  %pM\n",
 239                                                 env_enetaddr);
 240                                 }
 241
 242                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 243                         }
 244
 245                         eth_number++;
 246                         dev = dev->next;
 247                 } while(dev != eth_devices);
 248
 249 #ifdef CONFIG_NET_MULTI
 250                 /* update current ethernet name */
 251                 if (eth_current) {
 252                         char *act = getenv("ethact");
 253                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 254                                 setenv("ethact", eth_current->name);
 255                 } else
 256                         setenv("ethact", NULL);
 257 #endif
 258
 259                 putc ('\n');
 260         }
 261
 262         return eth_number;
 263 }
 264
 265 void eth_set_enetaddr(int num, char *addr) {
 266         struct eth_device *dev;
 267         unsigned char enetaddr[6];
 268
 269         debug ("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
 270
 271         if (!eth_devices)
 272                 return;
 273
 274         eth_parse_enetaddr(addr, enetaddr);
 275
 276         dev = eth_devices;
 277         while(num-- > 0) {
 278                 dev = dev->next;
 279
 280                 if (dev == eth_devices)
 281                         return;
 282         }
 283
 284         debug ( "Setting new HW address on %s\n"
 285                 "New Address is             %pM\n",
 286                 dev->name, enetaddr);
 287
 288         memcpy(dev->enetaddr, enetaddr, 6);
 289 }
 290 #ifdef CONFIG_MCAST_TFTP
 291 /* Multicast.
 292  * mcast_addr: multicast ipaddr from which multicast Mac is made
 293  * join: 1=join, 0=leave.
 294  */
 295 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 296 {
 297  u8 mcast_mac[6];
 298         if (!eth_current || !eth_current->mcast)
 299                 return -1;
 300         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 301         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 302         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 303         mcast_mac[2] = 0x5e;
 304         mcast_mac[1] = 0x0;
 305         mcast_mac[0] = 0x1;
 306         return eth_current->mcast(eth_current, mcast_mac, join);
 307 }
 308
 309 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 310  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 311  * some other adapter -- hash tables
 312  */
 313 #define CRCPOLY_LE 0xedb88320
 314 u32 ether_crc (size_t len, unsigned char const *p)
 315 {
 316         int i;
 317         u32 crc;
 318         crc = ~0;
 319         while (len--) {
 320                 crc ^= *p++;
 321                 for (i = 0; i < 8; i++)
 322                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 323         }
 324         /* an reverse the bits, cuz of way they arrive -- last-first */
 325         crc = (crc >> 16) | (crc << 16);
 326         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 327         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 328         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 329         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 330         return crc;
 331 }
 332
 333 #endif
 334
 335
 336 int eth_init(bd_t *bis)
 337 {
 338         struct eth_device* old_current;
 339
 340         if (!eth_current) {
 341                 puts ("No ethernet found.\n");
 342                 return -1;
 343         }
 344
 345         old_current = eth_current;
 346         do {
 347                 debug ("Trying %s\n", eth_current->name);
 348
 349                 if (eth_current->init(eth_current,bis) >= 0) {
 350                         eth_current->state = ETH_STATE_ACTIVE;
 351
 352                         return 0;
 353                 }
 354                 debug  ("FAIL\n");
 355
 356                 eth_try_another(0);
 357         } while (old_current != eth_current);
 358
 359         return -1;
 360 }
 361
 362 void eth_halt(void)
 363 {
 364         if (!eth_current)
 365                 return;
 366
 367         eth_current->halt(eth_current);
 368
 369         eth_current->state = ETH_STATE_PASSIVE;
 370 }
 371
 372 int eth_send(volatile void *packet, int length)
 373 {
 374         if (!eth_current)
 375                 return -1;
 376
 377         return eth_current->send(eth_current, packet, length);
 378 }
 379
 380 int eth_rx(void)
 381 {
 382         if (!eth_current)
 383                 return -1;
 384
 385         return eth_current->recv(eth_current);
 386 }
 387
 388 #ifdef CONFIG_API
 389 static void eth_save_packet(volatile void *packet, int length)
 390 {
 391         volatile char *p = packet;
 392         int i;
 393
 394         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 395                 return;
 396
 397         if (PKTSIZE < length)
 398                 return;
 399
 400         for (i = 0; i < length; i++)
 401                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 402
 403         eth_rcv_bufs[eth_rcv_last].length = length;
 404         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 405 }
 406
 407 int eth_receive(volatile void *packet, int length)
 408 {
 409         volatile char *p = packet;
 410         void *pp = push_packet;
 411         int i;
 412
 413         if (eth_rcv_current == eth_rcv_last) {
 414                 push_packet = eth_save_packet;
 415                 eth_rx();
 416                 push_packet = pp;
 417
 418                 if (eth_rcv_current == eth_rcv_last)
 419                         return -1;
 420         }
 421
 422         if (length < eth_rcv_bufs[eth_rcv_current].length)
 423                 return -1;
 424
 425         length = eth_rcv_bufs[eth_rcv_current].length;
 426
 427         for (i = 0; i < length; i++)
 428                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 429
 430         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 431         return length;
 432 }
 433 #endif /* CONFIG_API */
 434
 435 void eth_try_another(int first_restart)
 436 {
 437         static struct eth_device *first_failed = NULL;
 438         char *ethrotate;
 439
 440         /*
 441          * Do not rotate between network interfaces when
 442          * 'ethrotate' variable is set to 'no'.
 443          */
 444         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 445             (strcmp(ethrotate, "no") == 0))
 446                 return;
 447
 448         if (!eth_current)
 449                 return;
 450
 451         if (first_restart) {
 452                 first_failed = eth_current;
 453         }
 454
 455         eth_current = eth_current->next;
 456
 457 #ifdef CONFIG_NET_MULTI
 458         /* update current ethernet name */
 459         {
 460                 char *act = getenv("ethact");
 461                 if (act == NULL || strcmp(act, eth_current->name) != 0)
 462                         setenv("ethact", eth_current->name);
 463         }
 464 #endif
 465
 466         if (first_failed == eth_current) {
 467                 NetRestartWrap = 1;
 468         }
 469 }
 470
 471 #ifdef CONFIG_NET_MULTI
 472 void eth_set_current(void)
 473 {
 474         struct eth_device* old_current;
 475         int     env_id;
 476
 477         if (!eth_current)       /* XXX no current */
 478                 return;
 479
 480         env_id = get_env_id();
 481         if ((act == NULL) || (env_changed_id != env_id)) {
 482                 act = getenv("ethact");
 483                 env_changed_id = env_id;
 484         }
 485         if (act != NULL) {
 486                 old_current = eth_current;
 487                 do {
 488                         if (strcmp(eth_current->name, act) == 0)
 489                                 return;
 490                         eth_current = eth_current->next;
 491                 } while (old_current != eth_current);
 492         }
 493
 494         setenv("ethact", eth_current->name);
 495 }
 496 #endif
 497
 498 char *eth_get_name (void)
 499 {
 500         return (eth_current ? eth_current->name : "unknown");
 501 }
 502 #elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)
 503
 504 extern int at91rm9200_miiphy_initialize(bd_t *bis);
 505 extern int emac4xx_miiphy_initialize(bd_t *bis);
 506 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 507 extern int ns7520_miiphy_initialize(bd_t *bis);
 508 extern int davinci_eth_miiphy_initialize(bd_t *bis);
 509
 510
 511 int eth_initialize(bd_t *bis)
 512 {
 513 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 514         miiphy_init();
 515 #endif
 516
 517 #if defined(CONFIG_AT91RM9200)
 518         at91rm9200_miiphy_initialize(bis);
 519 #endif
 520 #if defined(CONFIG_PPC4xx_EMAC)
 521         emac4xx_miiphy_initialize(bis);
 522 #endif
 523 #if defined(CONFIG_MCF52x2)
 524         mcf52x2_miiphy_initialize(bis);
 525 #endif
 526 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 527         ns7520_miiphy_initialize(bis);
 528 #endif
 529 #if defined(CONFIG_DRIVER_TI_EMAC)
 530         davinci_eth_miiphy_initialize(bis);
 531 #endif
 532         return 0;
 533 }
 534 #endif