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