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                         if (strchr(dev->name, ' '))
 238                                 puts("\nWarning: eth device name has a space!\n");
 239
 240                         eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);
 241
 242                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 243                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 244                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 245                                 {
 246                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 247                                                 dev->name);
 248                                         printf ("Address in SROM is         %pM\n",
 249                                                 dev->enetaddr);
 250                                         printf ("Address in environment is  %pM\n",
 251                                                 env_enetaddr);
 252                                 }
 253
 254                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 255                         }
 256                         if (dev->write_hwaddr &&
 257                                 !eth_mac_skip(eth_number) &&
 258                                 is_valid_ether_addr(dev->enetaddr)) {
 259                                 dev->write_hwaddr(dev);
 260                         }
 261
 262                         eth_number++;
 263                         dev = dev->next;
 264                 } while(dev != eth_devices);
 265
 266 #ifdef CONFIG_NET_MULTI
 267                 /* update current ethernet name */
 268                 if (eth_current) {
 269                         char *act = getenv("ethact");
 270                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 271                                 setenv("ethact", eth_current->name);
 272                 } else
 273                         setenv("ethact", NULL);
 274 #endif
 275
 276                 putc ('\n');
 277         }
 278
 279         return eth_number;
 280 }
 281
 282 #ifdef CONFIG_MCAST_TFTP
 283 /* Multicast.
 284  * mcast_addr: multicast ipaddr from which multicast Mac is made
 285  * join: 1=join, 0=leave.
 286  */
 287 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 288 {
 289  u8 mcast_mac[6];
 290         if (!eth_current || !eth_current->mcast)
 291                 return -1;
 292         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 293         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 294         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 295         mcast_mac[2] = 0x5e;
 296         mcast_mac[1] = 0x0;
 297         mcast_mac[0] = 0x1;
 298         return eth_current->mcast(eth_current, mcast_mac, join);
 299 }
 300
 301 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 302  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 303  * some other adapter -- hash tables
 304  */
 305 #define CRCPOLY_LE 0xedb88320
 306 u32 ether_crc (size_t len, unsigned char const *p)
 307 {
 308         int i;
 309         u32 crc;
 310         crc = ~0;
 311         while (len--) {
 312                 crc ^= *p++;
 313                 for (i = 0; i < 8; i++)
 314                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 315         }
 316         /* an reverse the bits, cuz of way they arrive -- last-first */
 317         crc = (crc >> 16) | (crc << 16);
 318         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 319         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 320         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 321         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 322         return crc;
 323 }
 324
 325 #endif
 326
 327
 328 int eth_init(bd_t *bis)
 329 {
 330         int eth_number;
 331         struct eth_device *old_current, *dev;
 332
 333         if (!eth_current) {
 334                 puts ("No ethernet found.\n");
 335                 return -1;
 336         }
 337
 338         /* Sync environment with network devices */
 339         eth_number = 0;
 340         dev = eth_devices;
 341         do {
 342                 uchar env_enetaddr[6];
 343
 344                 if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
 345                         memcpy(dev->enetaddr, env_enetaddr, 6);
 346
 347                 ++eth_number;
 348                 dev = dev->next;
 349         } while (dev != eth_devices);
 350
 351         old_current = eth_current;
 352         do {
 353                 debug("Trying %s\n", eth_current->name);
 354
 355                 if (eth_current->init(eth_current,bis) >= 0) {
 356                         eth_current->state = ETH_STATE_ACTIVE;
 357
 358                         return 0;
 359                 }
 360                 debug("FAIL\n");
 361
 362                 eth_try_another(0);
 363         } while (old_current != eth_current);
 364
 365         return -1;
 366 }
 367
 368 void eth_halt(void)
 369 {
 370         if (!eth_current)
 371                 return;
 372
 373         eth_current->halt(eth_current);
 374
 375         eth_current->state = ETH_STATE_PASSIVE;
 376 }
 377
 378 int eth_send(volatile void *packet, int length)
 379 {
 380         if (!eth_current)
 381                 return -1;
 382
 383         return eth_current->send(eth_current, packet, length);
 384 }
 385
 386 int eth_rx(void)
 387 {
 388         if (!eth_current)
 389                 return -1;
 390
 391         return eth_current->recv(eth_current);
 392 }
 393
 394 #ifdef CONFIG_API
 395 static void eth_save_packet(volatile void *packet, int length)
 396 {
 397         volatile char *p = packet;
 398         int i;
 399
 400         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 401                 return;
 402
 403         if (PKTSIZE < length)
 404                 return;
 405
 406         for (i = 0; i < length; i++)
 407                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 408
 409         eth_rcv_bufs[eth_rcv_last].length = length;
 410         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 411 }
 412
 413 int eth_receive(volatile void *packet, int length)
 414 {
 415         volatile char *p = packet;
 416         void *pp = push_packet;
 417         int i;
 418
 419         if (eth_rcv_current == eth_rcv_last) {
 420                 push_packet = eth_save_packet;
 421                 eth_rx();
 422                 push_packet = pp;
 423
 424                 if (eth_rcv_current == eth_rcv_last)
 425                         return -1;
 426         }
 427
 428         if (length < eth_rcv_bufs[eth_rcv_current].length)
 429                 return -1;
 430
 431         length = eth_rcv_bufs[eth_rcv_current].length;
 432
 433         for (i = 0; i < length; i++)
 434                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 435
 436         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 437         return length;
 438 }
 439 #endif /* CONFIG_API */
 440
 441 void eth_try_another(int first_restart)
 442 {
 443         static struct eth_device *first_failed = NULL;
 444         char *ethrotate;
 445
 446         /*
 447          * Do not rotate between network interfaces when
 448          * 'ethrotate' variable is set to 'no'.
 449          */
 450         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 451             (strcmp(ethrotate, "no") == 0))
 452                 return;
 453
 454         if (!eth_current)
 455                 return;
 456
 457         if (first_restart) {
 458                 first_failed = eth_current;
 459         }
 460
 461         eth_current = eth_current->next;
 462
 463 #ifdef CONFIG_NET_MULTI
 464         /* update current ethernet name */
 465         {
 466                 char *act = getenv("ethact");
 467                 if (act == NULL || strcmp(act, eth_current->name) != 0)
 468                         setenv("ethact", eth_current->name);
 469         }
 470 #endif
 471
 472         if (first_failed == eth_current) {
 473                 NetRestartWrap = 1;
 474         }
 475 }
 476
 477 #ifdef CONFIG_NET_MULTI
 478 void eth_set_current(void)
 479 {
 480         static char *act = NULL;
 481         static int  env_changed_id = 0;
 482         struct eth_device* old_current;
 483         int     env_id;
 484
 485         if (!eth_current)       /* XXX no current */
 486                 return;
 487
 488         env_id = get_env_id();
 489         if ((act == NULL) || (env_changed_id != env_id)) {
 490                 act = getenv("ethact");
 491                 env_changed_id = env_id;
 492         }
 493         if (act != NULL) {
 494                 old_current = eth_current;
 495                 do {
 496                         if (strcmp(eth_current->name, act) == 0)
 497                                 return;
 498                         eth_current = eth_current->next;
 499                 } while (old_current != eth_current);
 500         }
 501
 502         setenv("ethact", eth_current->name);
 503 }
 504 #endif
 505
 506 char *eth_get_name (void)
 507 {
 508         return (eth_current ? eth_current->name : "unknown");
 509 }
 510
 511 #else /* !CONFIG_NET_MULTI */
 512
 513 #warning Ethernet driver is deprecated.  Please update to use CONFIG_NET_MULTI
 514
 515 extern int at91rm9200_miiphy_initialize(bd_t *bis);
 516 extern int mcf52x2_miiphy_initialize(bd_t *bis);
 517 extern int ns7520_miiphy_initialize(bd_t *bis);
 518
 519
 520 int eth_initialize(bd_t *bis)
 521 {
 522 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 523         miiphy_init();
 524 #endif
 525
 526 #if defined(CONFIG_AT91RM9200)
 527         at91rm9200_miiphy_initialize(bis);
 528 #endif
 529 #if defined(CONFIG_MCF52x2)
 530         mcf52x2_miiphy_initialize(bis);
 531 #endif
 532 #if defined(CONFIG_DRIVER_NS7520_ETHERNET)
 533         ns7520_miiphy_initialize(bis);
 534 #endif
 535         return 0;
 536 }
 537 #endif