net/eth.c

   1 /*
   2  * (C) Copyright 2001-2010
   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 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
  30 {
  31         char *end;
  32         int i;
  33
  34         for (i = 0; i < 6; ++i) {
  35                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
  36                 if (addr)
  37                         addr = (*end) ? end + 1 : end;
  38         }
  39 }
  40
  41 int eth_getenv_enetaddr(char *name, uchar *enetaddr)
  42 {
  43         eth_parse_enetaddr(getenv(name), enetaddr);
  44         return is_valid_ether_addr(enetaddr);
  45 }
  46
  47 int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
  48 {
  49         char buf[20];
  50
  51         sprintf(buf, "%pM", enetaddr);
  52
  53         return setenv(name, buf);
  54 }
  55
  56 int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr)
  57 {
  58         char enetvar[32];
  59         sprintf(enetvar, index ? "eth%daddr" : "ethaddr", index);
  60         return eth_getenv_enetaddr(enetvar, enetaddr);
  61 }
  62
  63 #ifdef CONFIG_NET_MULTI
  64
  65 static int eth_mac_skip(int index)
  66 {
  67         char enetvar[15];
  68         char *skip_state;
  69         sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  70         return ((skip_state = getenv(enetvar)) != NULL);
  71 }
  72
  73 /*
  74  * CPU and board-specific Ethernet initializations.  Aliased function
  75  * signals caller to move on
  76  */
  77 static int __def_eth_init(bd_t *bis)
  78 {
  79         return -1;
  80 }
  81 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
  82 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
  83
  84 extern int mv6436x_eth_initialize(bd_t *);
  85 extern int mv6446x_eth_initialize(bd_t *);
  86
  87 #ifdef CONFIG_API
  88 extern void (*push_packet)(volatile void *, int);
  89
  90 static struct {
  91         uchar data[PKTSIZE];
  92         int length;
  93 } eth_rcv_bufs[PKTBUFSRX];
  94
  95 static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
  96 #endif
  97
  98 static struct eth_device *eth_devices, *eth_current;
  99
 100 struct eth_device *eth_get_dev(void)
 101 {
 102         return eth_current;
 103 }
 104
 105 struct eth_device *eth_get_dev_by_name(char *devname)
 106 {
 107         struct eth_device *dev, *target_dev;
 108
 109         if (!eth_devices)
 110                 return NULL;
 111
 112         dev = eth_devices;
 113         target_dev = NULL;
 114         do {
 115                 if (strcmp(devname, dev->name) == 0) {
 116                         target_dev = dev;
 117                         break;
 118                 }
 119                 dev = dev->next;
 120         } while (dev != eth_devices);
 121
 122         return target_dev;
 123 }
 124
 125 struct eth_device *eth_get_dev_by_index(int index)
 126 {
 127         struct eth_device *dev, *target_dev;
 128         int idx = 0;
 129
 130         if (!eth_devices)
 131                 return NULL;
 132
 133         dev = eth_devices;
 134         target_dev = NULL;
 135         do {
 136                 if (idx == index) {
 137                         target_dev = dev;
 138                         break;
 139                 }
 140                 dev = dev->next;
 141                 idx++;
 142         } while (dev != eth_devices);
 143
 144         return target_dev;
 145 }
 146
 147 int eth_get_dev_index (void)
 148 {
 149         struct eth_device *dev;
 150         int num = 0;
 151
 152         if (!eth_devices) {
 153                 return (-1);
 154         }
 155
 156         for (dev = eth_devices; dev; dev = dev->next) {
 157                 if (dev == eth_current)
 158                         break;
 159                 ++num;
 160         }
 161
 162         if (dev) {
 163                 return (num);
 164         }
 165
 166         return (0);
 167 }
 168
 169 int eth_register(struct eth_device* dev)
 170 {
 171         struct eth_device *d;
 172
 173         if (!eth_devices) {
 174                 eth_current = eth_devices = dev;
 175 #ifdef CONFIG_NET_MULTI
 176                 /* update current ethernet name */
 177                 {
 178                         char *act = getenv("ethact");
 179                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 180                                 setenv("ethact", eth_current->name);
 181                 }
 182 #endif
 183         } else {
 184                 for (d=eth_devices; d->next!=eth_devices; d=d->next)
 185                         ;
 186                 d->next = dev;
 187         }
 188
 189         dev->state = ETH_STATE_INIT;
 190         dev->next  = eth_devices;
 191
 192         return 0;
 193 }
 194
 195 int eth_initialize(bd_t *bis)
 196 {
 197         unsigned char env_enetaddr[6];
 198         int eth_number = 0;
 199
 200         eth_devices = NULL;
 201         eth_current = NULL;
 202
 203         show_boot_progress (64);
 204 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 205         miiphy_init();
 206 #endif
 207         /* Try board-specific initialization first.  If it fails or isn't
 208          * present, try the cpu-specific initialization */
 209         if (board_eth_init(bis) < 0)
 210                 cpu_eth_init(bis);
 211
 212 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 213         mv6436x_eth_initialize(bis);
 214 #endif
 215 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 216         mv6446x_eth_initialize(bis);
 217 #endif
 218         if (!eth_devices) {
 219                 puts ("No ethernet found.\n");
 220                 show_boot_progress (-64);
 221         } else {
 222                 struct eth_device *dev = eth_devices;
 223                 char *ethprime = getenv ("ethprime");
 224
 225                 show_boot_progress (65);
 226                 do {
 227                         if (eth_number)
 228                                 puts (", ");
 229
 230                         printf("%s", dev->name);
 231
 232                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 233                                 eth_current = dev;
 234                                 puts (" [PRIME]");
 235                         }
 236
 237                         eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);
 238
 239                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 240                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 241                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 242                                 {
 243                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 244                                                 dev->name);
 245                                         printf ("Address in SROM is         %pM\n",
 246                                                 dev->enetaddr);
 247                                         printf ("Address in environment is  %pM\n",
 248                                                 env_enetaddr);
 249                                 }
 250
 251                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 252                         }
 253                         if (dev->write_hwaddr &&
 254                                 !eth_mac_skip(eth_number) &&
 255                                 is_valid_ether_addr(dev->enetaddr)) {
 256                                 dev->write_hwaddr(dev);
 257                         }
 258
 259                         eth_number++;
 260                         dev = dev->next;
 261                 } while(dev != eth_devices);
 262
 263 #ifdef CONFIG_NET_MULTI
 264                 /* update current ethernet name */
 265                 if (eth_current) {
 266                         char *act = getenv("ethact");
 267                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 268                                 setenv("ethact", eth_current->name);
 269                 } else
 270                         setenv("ethact", NULL);
 271 #endif
 272
 273                 putc ('\n');
 274         }
 275
 276         return eth_number;
 277 }
 278
 279 #ifdef CONFIG_MCAST_TFTP
 280 /* Multicast.
 281  * mcast_addr: multicast ipaddr from which multicast Mac is made
 282  * join: 1=join, 0=leave.
 283  */
 284 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 285 {
 286  u8 mcast_mac[6];
 287         if (!eth_current || !eth_current->mcast)
 288                 return -1;
 289         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 290         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 291         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 292         mcast_mac[2] = 0x5e;
 293         mcast_mac[1] = 0x0;
 294         mcast_mac[0] = 0x1;
 295         return eth_current->mcast(eth_current, mcast_mac, join);
 296 }
 297
 298 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 299  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 300  * some other adapter -- hash tables
 301  */
 302 #define CRCPOLY_LE 0xedb88320
 303 u32 ether_crc (size_t len, unsigned char const *p)
 304 {
 305         int i;
 306         u32 crc;
 307         crc = ~0;
 308         while (len--) {
 309                 crc ^= *p++;
 310                 for (i = 0; i < 8; i++)
 311                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 312         }
 313         /* an reverse the bits, cuz of way they arrive -- last-first */
 314         crc = (crc >> 16) | (crc << 16);
 315         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 316         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 317         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 318         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 319         return crc;
 320 }
 321
 322 #endif
 323
 324
 325 int eth_init(bd_t *bis)
 326 {
 327         int eth_number;
 328         struct eth_device *old_current, *dev;
 329
 330         if (!eth_current) {
 331                 puts ("No ethernet found.\n");
 332                 return -1;
 333         }
 334
 335         /* Sync environment with network devices */
 336         eth_number = 0;
 337         dev = eth_devices;
 338         do {
 339                 uchar env_enetaddr[6];
 340
 341                 if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
 342                         memcpy(dev->enetaddr, env_enetaddr, 6);
 343
 344                 ++eth_number;
 345                 dev = dev->next;
 346         } while (dev != eth_devices);
 347
 348         old_current = eth_current;
 349         do {
 350                 debug("Trying %s\n", eth_current->name);
 351
 352                 if (eth_current->init(eth_current,bis) >= 0) {
 353                         eth_current->state = ETH_STATE_ACTIVE;
 354
 355                         return 0;
 356                 }
 357                 debug("FAIL\n");
 358
 359                 eth_try_another(0);
 360         } while (old_current != eth_current);
 361
 362         return -1;
 363 }
 364
 365 void eth_halt(void)
 366 {
 367         if (!eth_current)
 368                 return;
 369
 370         eth_current->halt(eth_current);
 371
 372         eth_current->state = ETH_STATE_PASSIVE;
 373 }
 374
 375 int eth_send(volatile void *packet, int length)
 376 {
 377         if (!eth_current)
 378                 return -1;
 379
 380         return eth_current->send(eth_current, packet, length);
 381 }
 382
 383 int eth_rx(void)
 384 {
 385         if (!eth_current)
 386                 return -1;
 387
 388         return eth_current->recv(eth_current);
 389 }
 390
 391 #ifdef CONFIG_API
 392 static void eth_save_packet(volatile void *packet, int length)
 393 {
 394         volatile char *p = packet;
 395         int i;
 396
 397         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 398                 return;
 399
 400         if (PKTSIZE < length)
 401                 return;
 402
 403         for (i = 0; i < length; i++)
 404                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 405
 406         eth_rcv_bufs[eth_rcv_last].length = length;
 407         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 408 }
 409
 410 int eth_receive(volatile void *packet, int length)
 411 {
 412         volatile char *p = packet;
 413         void *pp = push_packet;
 414         int i;
 415
 416         if (eth_rcv_current == eth_rcv_last) {
 417                 push_packet = eth_save_packet;
 418                 eth_rx();
 419                 push_packet = pp;
 420
 421                 if (eth_rcv_current == eth_rcv_last)
 422                         return -1;
 423         }
 424
 425         if (length < eth_rcv_bufs[eth_rcv_current].length)
 426                 return -1;
 427
 428         length = eth_rcv_bufs[eth_rcv_current].length;
 429
 430         for (i = 0; i < length; i++)
 431                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 432
 433         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 434         return length;
 435 }
 436 #endif /* CONFIG_API */
 437
 438 void eth_try_another(int first_restart)
 439 {
 440         static struct eth_device *first_failed = NULL;
 441         char *ethrotate;
 442
 443         /*
 444          * Do not rotate between network interfaces when
 445          * 'ethrotate' variable is set to 'no'.
 446          */
 447         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 448             (strcmp(ethrotate, "no") == 0))
 449                 return;
 450
 451         if (!eth_current)
 452                 return;
 453
 454         if (first_restart) {
 455                 first_failed = eth_current;
 456         }
 457
 458         eth_current = eth_current->next;
 459
 460 #ifdef CONFIG_NET_MULTI
 461         /* update current ethernet name */
 462         {
 463                 char *act = getenv("ethact");
 464                 if (act == NULL || strcmp(act, eth_current->name) != 0)
 465                         setenv("ethact", eth_current->name);
 466         }
 467 #endif
 468
 469         if (first_failed == eth_current) {
 470                 NetRestartWrap = 1;
 471         }
 472 }
 473
 474 #ifdef CONFIG_NET_MULTI
 475 void eth_set_current(void)
 476 {
 477         static char *act = NULL;
 478         static int  env_changed_id = 0;
 479         struct eth_device* old_current;
 480         int     env_id;
 481
 482         if (!eth_current)       /* XXX no current */
 483                 return;
 484
 485         env_id = get_env_id();
 486         if ((act == NULL) || (env_changed_id != env_id)) {
 487                 act = getenv("ethact");
 488                 env_changed_id = env_id;
 489         }
 490         if (act != NULL) {
 491                 old_current = eth_current;
 492                 do {
 493                         if (strcmp(eth_current->name, act) == 0)
 494                                 return;
 495                         eth_current = eth_current->next;
 496                 } while (old_current != eth_current);
 497         }
 498
 499         setenv("ethact", eth_current->name);
 500 }
 501 #endif
 502
 503 char *eth_get_name (void)
 504 {
 505         return (eth_current ? eth_current->name : "unknown");
 506 }
 507
 508 #else /* !CONFIG_NET_MULTI */
 509
 510 #warning Ethernet driver is deprecated.  Please update to use CONFIG_NET_MULTI
 511
 512 extern int at91rm9200_miiphy_initialize(bd_t *bis);
 513 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 514 extern int ns7520_miiphy_initialize(bd_t *bis);
 515
 516
 517 int eth_initialize(bd_t *bis)
 518 {
 519 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 520         miiphy_init();
 521 #endif
 522
 523 #if defined(CONFIG_AT91RM9200)
 524         at91rm9200_miiphy_initialize(bis);
 525 #endif
 526 #if defined(CONFIG_MCF52x2)
 527         mcf52x2_miiphy_initialize(bis);
 528 #endif
 529 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 530         ns7520_miiphy_initialize(bis);
 531 #endif
 532         return 0;
 533 }
 534 #endif