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 #include <phy.h>
  29
  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(const char *base_name, int index,
  58                                  uchar *enetaddr)
  59 {
  60         char enetvar[32];
  61         sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
  62         return eth_getenv_enetaddr(enetvar, enetaddr);
  63 }
  64
  65 #ifdef CONFIG_NET_MULTI
  66
  67 static int eth_mac_skip(int index)
  68 {
  69         char enetvar[15];
  70         char *skip_state;
  71         sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
  72         return ((skip_state = getenv(enetvar)) != NULL);
  73 }
  74
  75 /*
  76  * CPU and board-specific Ethernet initializations.  Aliased function
  77  * signals caller to move on
  78  */
  79 static int __def_eth_init(bd_t *bis)
  80 {
  81         return -1;
  82 }
  83 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
  84 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
  85
  86 extern int mv6436x_eth_initialize(bd_t *);
  87 extern int mv6446x_eth_initialize(bd_t *);
  88
  89 #ifdef CONFIG_API
  90 extern void (*push_packet)(volatile void *, int);
  91
  92 static struct {
  93         uchar data[PKTSIZE];
  94         int length;
  95 } eth_rcv_bufs[PKTBUFSRX];
  96
  97 static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
  98 #endif
  99
 100 static struct eth_device *eth_devices, *eth_current;
 101
 102 struct eth_device *eth_get_dev(void)
 103 {
 104         return eth_current;
 105 }
 106
 107 struct eth_device *eth_get_dev_by_name(const char *devname)
 108 {
 109         struct eth_device *dev, *target_dev;
 110
 111         if (!eth_devices)
 112                 return NULL;
 113
 114         dev = eth_devices;
 115         target_dev = NULL;
 116         do {
 117                 if (strcmp(devname, dev->name) == 0) {
 118                         target_dev = dev;
 119                         break;
 120                 }
 121                 dev = dev->next;
 122         } while (dev != eth_devices);
 123
 124         return target_dev;
 125 }
 126
 127 struct eth_device *eth_get_dev_by_index(int index)
 128 {
 129         struct eth_device *dev, *target_dev;
 130         int idx = 0;
 131
 132         if (!eth_devices)
 133                 return NULL;
 134
 135         dev = eth_devices;
 136         target_dev = NULL;
 137         do {
 138                 if (idx == index) {
 139                         target_dev = dev;
 140                         break;
 141                 }
 142                 dev = dev->next;
 143                 idx++;
 144         } while (dev != eth_devices);
 145
 146         return target_dev;
 147 }
 148
 149 int eth_get_dev_index (void)
 150 {
 151         struct eth_device *dev;
 152         int num = 0;
 153
 154         if (!eth_devices) {
 155                 return (-1);
 156         }
 157
 158         for (dev = eth_devices; dev; dev = dev->next) {
 159                 if (dev == eth_current)
 160                         break;
 161                 ++num;
 162         }
 163
 164         if (dev) {
 165                 return (num);
 166         }
 167
 168         return (0);
 169 }
 170
 171 static void eth_current_changed(void)
 172 {
 173 #ifdef CONFIG_NET_MULTI
 174         {
 175                 char *act = getenv("ethact");
 176                 /* update current ethernet name */
 177                 if (eth_current)
 178                 {
 179                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 180                                 setenv("ethact", eth_current->name);
 181                 }
 182                 /*
 183                  * remove the variable completely if there is no active
 184                  * interface
 185                  */
 186                 else if (act != NULL)
 187                         setenv("ethact", NULL);
 188         }
 189 #endif
 190 }
 191
 192 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
 193                    int eth_number)
 194 {
 195         unsigned char env_enetaddr[6];
 196         int ret = 0;
 197
 198         if (!eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr))
 199                 return -1;
 200
 201         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 202                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 203                         memcmp(dev->enetaddr, env_enetaddr, 6)) {
 204                         printf("\nWarning: %s MAC addresses don't match:\n",
 205                                 dev->name);
 206                         printf("Address in SROM is         %pM\n",
 207                                 dev->enetaddr);
 208                         printf("Address in environment is  %pM\n",
 209                                 env_enetaddr);
 210                 }
 211
 212                 memcpy(dev->enetaddr, env_enetaddr, 6);
 213         }
 214
 215         if (dev->write_hwaddr &&
 216                 !eth_mac_skip(eth_number) &&
 217                 is_valid_ether_addr(dev->enetaddr)) {
 218                 ret = dev->write_hwaddr(dev);
 219         }
 220
 221         return ret;
 222 }
 223
 224 int eth_register(struct eth_device *dev)
 225 {
 226         struct eth_device *d;
 227
 228         size_t len = strlen(dev->name);
 229         if (len >= NAMESIZE) {
 230                 printf("Network driver name is too long (%zu >= %zu): %s\n",
 231                                                 len, NAMESIZE, dev->name);
 232                 return -1;
 233         }
 234
 235         if (!eth_devices) {
 236                 eth_current = eth_devices = dev;
 237                 eth_current_changed();
 238         } else {
 239                 for (d=eth_devices; d->next!=eth_devices; d=d->next)
 240                         ;
 241                 d->next = dev;
 242         }
 243
 244         dev->state = ETH_STATE_INIT;
 245         dev->next  = eth_devices;
 246
 247         return 0;
 248 }
 249
 250 int eth_initialize(bd_t *bis)
 251 {
 252         int eth_number = 0;
 253
 254         eth_devices = NULL;
 255         eth_current = NULL;
 256
 257         show_boot_progress (64);
 258 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 259         miiphy_init();
 260 #endif
 261
 262 #ifdef CONFIG_PHYLIB
 263         phy_init();
 264 #endif
 265
 266         /*
 267          * If board-specific initialization exists, call it.
 268          * If not, call a CPU-specific one
 269          */
 270         if (board_eth_init != __def_eth_init) {
 271                 if (board_eth_init(bis) < 0)
 272                         printf("Board Net Initialization Failed\n");
 273         } else if (cpu_eth_init != __def_eth_init) {
 274                 if (cpu_eth_init(bis) < 0)
 275                         printf("CPU Net Initialization Failed\n");
 276         } else
 277                 printf("Net Initialization Skipped\n");
 278
 279 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 280         mv6436x_eth_initialize(bis);
 281 #endif
 282 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 283         mv6446x_eth_initialize(bis);
 284 #endif
 285         if (!eth_devices) {
 286                 puts ("No ethernet found.\n");
 287                 show_boot_progress (-64);
 288         } else {
 289                 struct eth_device *dev = eth_devices;
 290                 char *ethprime = getenv ("ethprime");
 291
 292                 show_boot_progress (65);
 293                 do {
 294                         if (eth_number)
 295                                 puts (", ");
 296
 297                         printf("%s", dev->name);
 298
 299                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 300                                 eth_current = dev;
 301                                 puts (" [PRIME]");
 302                         }
 303
 304                         if (strchr(dev->name, ' '))
 305                                 puts("\nWarning: eth device name has a space!\n");
 306
 307                         if (eth_write_hwaddr(dev, "eth", eth_number))
 308                                 puts("Warning: failed to set MAC address\n");
 309
 310                         eth_number++;
 311                         dev = dev->next;
 312                 } while(dev != eth_devices);
 313
 314                 eth_current_changed();
 315                 putc ('\n');
 316         }
 317
 318         return eth_number;
 319 }
 320
 321 #ifdef CONFIG_MCAST_TFTP
 322 /* Multicast.
 323  * mcast_addr: multicast ipaddr from which multicast Mac is made
 324  * join: 1=join, 0=leave.
 325  */
 326 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 327 {
 328  u8 mcast_mac[6];
 329         if (!eth_current || !eth_current->mcast)
 330                 return -1;
 331         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 332         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 333         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 334         mcast_mac[2] = 0x5e;
 335         mcast_mac[1] = 0x0;
 336         mcast_mac[0] = 0x1;
 337         return eth_current->mcast(eth_current, mcast_mac, join);
 338 }
 339
 340 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 341  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 342  * some other adapter -- hash tables
 343  */
 344 #define CRCPOLY_LE 0xedb88320
 345 u32 ether_crc (size_t len, unsigned char const *p)
 346 {
 347         int i;
 348         u32 crc;
 349         crc = ~0;
 350         while (len--) {
 351                 crc ^= *p++;
 352                 for (i = 0; i < 8; i++)
 353                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 354         }
 355         /* an reverse the bits, cuz of way they arrive -- last-first */
 356         crc = (crc >> 16) | (crc << 16);
 357         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 358         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 359         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 360         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 361         return crc;
 362 }
 363
 364 #endif
 365
 366
 367 int eth_init(bd_t *bis)
 368 {
 369         int eth_number;
 370         struct eth_device *old_current, *dev;
 371
 372         if (!eth_current) {
 373                 puts ("No ethernet found.\n");
 374                 return -1;
 375         }
 376
 377         /* Sync environment with network devices */
 378         eth_number = 0;
 379         dev = eth_devices;
 380         do {
 381                 uchar env_enetaddr[6];
 382
 383                 if (eth_getenv_enetaddr_by_index("eth", eth_number,
 384                                                  env_enetaddr))
 385                         memcpy(dev->enetaddr, env_enetaddr, 6);
 386
 387                 ++eth_number;
 388                 dev = dev->next;
 389         } while (dev != eth_devices);
 390
 391         old_current = eth_current;
 392         do {
 393                 debug("Trying %s\n", eth_current->name);
 394
 395                 if (eth_current->init(eth_current,bis) >= 0) {
 396                         eth_current->state = ETH_STATE_ACTIVE;
 397
 398                         return 0;
 399                 }
 400                 debug("FAIL\n");
 401
 402                 eth_try_another(0);
 403         } while (old_current != eth_current);
 404
 405         return -1;
 406 }
 407
 408 void eth_halt(void)
 409 {
 410         if (!eth_current)
 411                 return;
 412
 413         eth_current->halt(eth_current);
 414
 415         eth_current->state = ETH_STATE_PASSIVE;
 416 }
 417
 418 int eth_send(volatile void *packet, int length)
 419 {
 420         if (!eth_current)
 421                 return -1;
 422
 423         return eth_current->send(eth_current, packet, length);
 424 }
 425
 426 int eth_rx(void)
 427 {
 428         if (!eth_current)
 429                 return -1;
 430
 431         return eth_current->recv(eth_current);
 432 }
 433
 434 #ifdef CONFIG_API
 435 static void eth_save_packet(volatile void *packet, int length)
 436 {
 437         volatile char *p = packet;
 438         int i;
 439
 440         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 441                 return;
 442
 443         if (PKTSIZE < length)
 444                 return;
 445
 446         for (i = 0; i < length; i++)
 447                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 448
 449         eth_rcv_bufs[eth_rcv_last].length = length;
 450         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 451 }
 452
 453 int eth_receive(volatile void *packet, int length)
 454 {
 455         volatile char *p = packet;
 456         void *pp = push_packet;
 457         int i;
 458
 459         if (eth_rcv_current == eth_rcv_last) {
 460                 push_packet = eth_save_packet;
 461                 eth_rx();
 462                 push_packet = pp;
 463
 464                 if (eth_rcv_current == eth_rcv_last)
 465                         return -1;
 466         }
 467
 468         if (length < eth_rcv_bufs[eth_rcv_current].length)
 469                 return -1;
 470
 471         length = eth_rcv_bufs[eth_rcv_current].length;
 472
 473         for (i = 0; i < length; i++)
 474                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 475
 476         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 477         return length;
 478 }
 479 #endif /* CONFIG_API */
 480
 481 void eth_try_another(int first_restart)
 482 {
 483         static struct eth_device *first_failed = NULL;
 484         char *ethrotate;
 485
 486         /*
 487          * Do not rotate between network interfaces when
 488          * 'ethrotate' variable is set to 'no'.
 489          */
 490         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 491             (strcmp(ethrotate, "no") == 0))
 492                 return;
 493
 494         if (!eth_current)
 495                 return;
 496
 497         if (first_restart) {
 498                 first_failed = eth_current;
 499         }
 500
 501         eth_current = eth_current->next;
 502
 503         eth_current_changed();
 504
 505         if (first_failed == eth_current) {
 506                 NetRestartWrap = 1;
 507         }
 508 }
 509
 510 void eth_set_current(void)
 511 {
 512         static char *act = NULL;
 513         static int  env_changed_id = 0;
 514         struct eth_device* old_current;
 515         int     env_id;
 516
 517         if (!eth_current)       /* XXX no current */
 518                 return;
 519
 520         env_id = get_env_id();
 521         if ((act == NULL) || (env_changed_id != env_id)) {
 522                 act = getenv("ethact");
 523                 env_changed_id = env_id;
 524         }
 525         if (act != NULL) {
 526                 old_current = eth_current;
 527                 do {
 528                         if (strcmp(eth_current->name, act) == 0)
 529                                 return;
 530                         eth_current = eth_current->next;
 531                 } while (old_current != eth_current);
 532         }
 533
 534         eth_current_changed();
 535 }
 536
 537 char *eth_get_name (void)
 538 {
 539         return (eth_current ? eth_current->name : "unknown");
 540 }
 541
 542 #else /* !CONFIG_NET_MULTI */
 543
 544 #warning Ethernet driver is deprecated.  Please update to use CONFIG_NET_MULTI
 545
 546 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 547 extern int ns7520_miiphy_initialize(bd_t *bis);
 548
 549
 550 int eth_initialize(bd_t *bis)
 551 {
 552 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 553         miiphy_init();
 554 #endif
 555
 556 #if defined(CONFIG_MCF52x2)
 557         mcf52x2_miiphy_initialize(bis);
 558 #endif
 559 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 560         ns7520_miiphy_initialize(bis);
 561 #endif
 562         return 0;
 563 }
 564 #endif