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(const 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         /*
 208          * If board-specific initialization exists, call it.
 209          * If not, call a CPU-specific one
 210          */
 211         if (board_eth_init != __def_eth_init) {
 212                 if (board_eth_init(bis) < 0)
 213                         printf("Board Net Initialization Failed\n");
 214         } else if (cpu_eth_init != __def_eth_init) {
 215                 if (cpu_eth_init(bis) < 0)
 216                         printf("CPU Net Initialization Failed\n");
 217         } else
 218                 printf("Net Initialization Skipped\n");
 219
 220 #if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
 221         mv6436x_eth_initialize(bis);
 222 #endif
 223 #if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
 224         mv6446x_eth_initialize(bis);
 225 #endif
 226         if (!eth_devices) {
 227                 puts ("No ethernet found.\n");
 228                 show_boot_progress (-64);
 229         } else {
 230                 struct eth_device *dev = eth_devices;
 231                 char *ethprime = getenv ("ethprime");
 232
 233                 show_boot_progress (65);
 234                 do {
 235                         if (eth_number)
 236                                 puts (", ");
 237
 238                         printf("%s", dev->name);
 239
 240                         if (ethprime && strcmp (dev->name, ethprime) == 0) {
 241                                 eth_current = dev;
 242                                 puts (" [PRIME]");
 243                         }
 244
 245                         if (strchr(dev->name, ' '))
 246                                 puts("\nWarning: eth device name has a space!\n");
 247
 248                         eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);
 249
 250                         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 251                                 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
 252                                     memcmp(dev->enetaddr, env_enetaddr, 6))
 253                                 {
 254                                         printf ("\nWarning: %s MAC addresses don't match:\n",
 255                                                 dev->name);
 256                                         printf ("Address in SROM is         %pM\n",
 257                                                 dev->enetaddr);
 258                                         printf ("Address in environment is  %pM\n",
 259                                                 env_enetaddr);
 260                                 }
 261
 262                                 memcpy(dev->enetaddr, env_enetaddr, 6);
 263                         }
 264                         if (dev->write_hwaddr &&
 265                                 !eth_mac_skip(eth_number) &&
 266                                 is_valid_ether_addr(dev->enetaddr)) {
 267                                 dev->write_hwaddr(dev);
 268                         }
 269
 270                         eth_number++;
 271                         dev = dev->next;
 272                 } while(dev != eth_devices);
 273
 274                 /* update current ethernet name */
 275                 if (eth_current) {
 276                         char *act = getenv("ethact");
 277                         if (act == NULL || strcmp(act, eth_current->name) != 0)
 278                                 setenv("ethact", eth_current->name);
 279                 } else
 280                         setenv("ethact", NULL);
 281
 282                 putc ('\n');
 283         }
 284
 285         return eth_number;
 286 }
 287
 288 #ifdef CONFIG_MCAST_TFTP
 289 /* Multicast.
 290  * mcast_addr: multicast ipaddr from which multicast Mac is made
 291  * join: 1=join, 0=leave.
 292  */
 293 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
 294 {
 295  u8 mcast_mac[6];
 296         if (!eth_current || !eth_current->mcast)
 297                 return -1;
 298         mcast_mac[5] = htonl(mcast_ip) & 0xff;
 299         mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
 300         mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
 301         mcast_mac[2] = 0x5e;
 302         mcast_mac[1] = 0x0;
 303         mcast_mac[0] = 0x1;
 304         return eth_current->mcast(eth_current, mcast_mac, join);
 305 }
 306
 307 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 308  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 309  * some other adapter -- hash tables
 310  */
 311 #define CRCPOLY_LE 0xedb88320
 312 u32 ether_crc (size_t len, unsigned char const *p)
 313 {
 314         int i;
 315         u32 crc;
 316         crc = ~0;
 317         while (len--) {
 318                 crc ^= *p++;
 319                 for (i = 0; i < 8; i++)
 320                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 321         }
 322         /* an reverse the bits, cuz of way they arrive -- last-first */
 323         crc = (crc >> 16) | (crc << 16);
 324         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 325         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 326         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 327         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 328         return crc;
 329 }
 330
 331 #endif
 332
 333
 334 int eth_init(bd_t *bis)
 335 {
 336         int eth_number;
 337         struct eth_device *old_current, *dev;
 338
 339         if (!eth_current) {
 340                 puts ("No ethernet found.\n");
 341                 return -1;
 342         }
 343
 344         /* Sync environment with network devices */
 345         eth_number = 0;
 346         dev = eth_devices;
 347         do {
 348                 uchar env_enetaddr[6];
 349
 350                 if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
 351                         memcpy(dev->enetaddr, env_enetaddr, 6);
 352
 353                 ++eth_number;
 354                 dev = dev->next;
 355         } while (dev != eth_devices);
 356
 357         old_current = eth_current;
 358         do {
 359                 debug("Trying %s\n", eth_current->name);
 360
 361                 if (eth_current->init(eth_current,bis) >= 0) {
 362                         eth_current->state = ETH_STATE_ACTIVE;
 363
 364                         return 0;
 365                 }
 366                 debug("FAIL\n");
 367
 368                 eth_try_another(0);
 369         } while (old_current != eth_current);
 370
 371         return -1;
 372 }
 373
 374 void eth_halt(void)
 375 {
 376         if (!eth_current)
 377                 return;
 378
 379         eth_current->halt(eth_current);
 380
 381         eth_current->state = ETH_STATE_PASSIVE;
 382 }
 383
 384 int eth_send(volatile void *packet, int length)
 385 {
 386         if (!eth_current)
 387                 return -1;
 388
 389         return eth_current->send(eth_current, packet, length);
 390 }
 391
 392 int eth_rx(void)
 393 {
 394         if (!eth_current)
 395                 return -1;
 396
 397         return eth_current->recv(eth_current);
 398 }
 399
 400 #ifdef CONFIG_API
 401 static void eth_save_packet(volatile void *packet, int length)
 402 {
 403         volatile char *p = packet;
 404         int i;
 405
 406         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 407                 return;
 408
 409         if (PKTSIZE < length)
 410                 return;
 411
 412         for (i = 0; i < length; i++)
 413                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 414
 415         eth_rcv_bufs[eth_rcv_last].length = length;
 416         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 417 }
 418
 419 int eth_receive(volatile void *packet, int length)
 420 {
 421         volatile char *p = packet;
 422         void *pp = push_packet;
 423         int i;
 424
 425         if (eth_rcv_current == eth_rcv_last) {
 426                 push_packet = eth_save_packet;
 427                 eth_rx();
 428                 push_packet = pp;
 429
 430                 if (eth_rcv_current == eth_rcv_last)
 431                         return -1;
 432         }
 433
 434         if (length < eth_rcv_bufs[eth_rcv_current].length)
 435                 return -1;
 436
 437         length = eth_rcv_bufs[eth_rcv_current].length;
 438
 439         for (i = 0; i < length; i++)
 440                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 441
 442         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 443         return length;
 444 }
 445 #endif /* CONFIG_API */
 446
 447 void eth_try_another(int first_restart)
 448 {
 449         static struct eth_device *first_failed = NULL;
 450         char *ethrotate, *act;
 451
 452         /*
 453          * Do not rotate between network interfaces when
 454          * 'ethrotate' variable is set to 'no'.
 455          */
 456         if (((ethrotate = getenv ("ethrotate")) != NULL) &&
 457             (strcmp(ethrotate, "no") == 0))
 458                 return;
 459
 460         if (!eth_current)
 461                 return;
 462
 463         if (first_restart) {
 464                 first_failed = eth_current;
 465         }
 466
 467         eth_current = eth_current->next;
 468
 469         /* update current ethernet name */
 470         act = getenv("ethact");
 471         if (act == NULL || strcmp(act, eth_current->name) != 0)
 472                 setenv("ethact", eth_current->name);
 473
 474         if (first_failed == eth_current) {
 475                 NetRestartWrap = 1;
 476         }
 477 }
 478
 479 void eth_set_current(void)
 480 {
 481         static char *act = NULL;
 482         static int  env_changed_id = 0;
 483         struct eth_device* old_current;
 484         int     env_id;
 485
 486         if (!eth_current)       /* XXX no current */
 487                 return;
 488
 489         env_id = get_env_id();
 490         if ((act == NULL) || (env_changed_id != env_id)) {
 491                 act = getenv("ethact");
 492                 env_changed_id = env_id;
 493         }
 494         if (act != NULL) {
 495                 old_current = eth_current;
 496                 do {
 497                         if (strcmp(eth_current->name, act) == 0)
 498                                 return;
 499                         eth_current = eth_current->next;
 500                 } while (old_current != eth_current);
 501         }
 502
 503         setenv("ethact", eth_current->name);
 504 }
 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