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