net/eth_legacy.c

   1 /*
   2  * (C) Copyright 2001-2015
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  * Joe Hershberger, National Instruments
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <command.h>
  11 #include <environment.h>
  12 #include <net.h>
  13 #include <phy.h>
  14 #include <linux/errno.h>
  15 #include "eth_internal.h"
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 /*
  20  * CPU and board-specific Ethernet initializations.  Aliased function
  21  * signals caller to move on
  22  */
  23 static int __def_eth_init(bd_t *bis)
  24 {
  25         return -1;
  26 }
  27 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
  28 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
  29
  30 #ifdef CONFIG_API
  31 static struct {
  32         uchar data[PKTSIZE];
  33         int length;
  34 } eth_rcv_bufs[PKTBUFSRX];
  35
  36 static unsigned int eth_rcv_current, eth_rcv_last;
  37 #endif
  38
  39 static struct eth_device *eth_devices;
  40 struct eth_device *eth_current;
  41
  42 void eth_set_current_to_next(void)
  43 {
  44         eth_current = eth_current->next;
  45 }
  46
  47 void eth_set_dev(struct eth_device *dev)
  48 {
  49         eth_current = dev;
  50 }
  51
  52 struct eth_device *eth_get_dev_by_name(const char *devname)
  53 {
  54         struct eth_device *dev, *target_dev;
  55
  56         BUG_ON(devname == NULL);
  57
  58         if (!eth_devices)
  59                 return NULL;
  60
  61         dev = eth_devices;
  62         target_dev = NULL;
  63         do {
  64                 if (strcmp(devname, dev->name) == 0) {
  65                         target_dev = dev;
  66                         break;
  67                 }
  68                 dev = dev->next;
  69         } while (dev != eth_devices);
  70
  71         return target_dev;
  72 }
  73
  74 struct eth_device *eth_get_dev_by_index(int index)
  75 {
  76         struct eth_device *dev, *target_dev;
  77
  78         if (!eth_devices)
  79                 return NULL;
  80
  81         dev = eth_devices;
  82         target_dev = NULL;
  83         do {
  84                 if (dev->index == index) {
  85                         target_dev = dev;
  86                         break;
  87                 }
  88                 dev = dev->next;
  89         } while (dev != eth_devices);
  90
  91         return target_dev;
  92 }
  93
  94 int eth_get_dev_index(void)
  95 {
  96         if (!eth_current)
  97                 return -1;
  98
  99         return eth_current->index;
 100 }
 101
 102 static int on_ethaddr(const char *name, const char *value, enum env_op op,
 103         int flags)
 104 {
 105         int index;
 106         struct eth_device *dev;
 107
 108         if (!eth_devices)
 109                 return 0;
 110
 111         /* look for an index after "eth" */
 112         index = simple_strtoul(name + 3, NULL, 10);
 113
 114         dev = eth_devices;
 115         do {
 116                 if (dev->index == index) {
 117                         switch (op) {
 118                         case env_op_create:
 119                         case env_op_overwrite:
 120                                 eth_parse_enetaddr(value, dev->enetaddr);
 121                                 eth_write_hwaddr(dev, "eth", dev->index);
 122                                 break;
 123                         case env_op_delete:
 124                                 memset(dev->enetaddr, 0, ARP_HLEN);
 125                         }
 126                 }
 127                 dev = dev->next;
 128         } while (dev != eth_devices);
 129
 130         return 0;
 131 }
 132 U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
 133
 134 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
 135                    int eth_number)
 136 {
 137         unsigned char env_enetaddr[ARP_HLEN];
 138         int ret = 0;
 139
 140         eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
 141
 142         if (!is_zero_ethaddr(env_enetaddr)) {
 143                 if (!is_zero_ethaddr(dev->enetaddr) &&
 144                     memcmp(dev->enetaddr, env_enetaddr, ARP_HLEN)) {
 145                         printf("\nWarning: %s MAC addresses don't match:\n",
 146                                dev->name);
 147                         printf("Address in SROM is         %pM\n",
 148                                dev->enetaddr);
 149                         printf("Address in environment is  %pM\n",
 150                                env_enetaddr);
 151                 }
 152
 153                 memcpy(dev->enetaddr, env_enetaddr, ARP_HLEN);
 154         } else if (is_valid_ethaddr(dev->enetaddr)) {
 155                 eth_setenv_enetaddr_by_index(base_name, eth_number,
 156                                              dev->enetaddr);
 157         } else if (is_zero_ethaddr(dev->enetaddr)) {
 158 #ifdef CONFIG_NET_RANDOM_ETHADDR
 159                 net_random_ethaddr(dev->enetaddr);
 160                 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
 161                        dev->name, eth_number, dev->enetaddr);
 162 #else
 163                 printf("\nError: %s address not set.\n",
 164                        dev->name);
 165                 return -EINVAL;
 166 #endif
 167         }
 168
 169         if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
 170                 if (!is_valid_ethaddr(dev->enetaddr)) {
 171                         printf("\nError: %s address %pM illegal value\n",
 172                                dev->name, dev->enetaddr);
 173                         return -EINVAL;
 174                 }
 175
 176                 ret = dev->write_hwaddr(dev);
 177                 if (ret)
 178                         printf("\nWarning: %s failed to set MAC address\n",
 179                                dev->name);
 180         }
 181
 182         return ret;
 183 }
 184
 185 int eth_register(struct eth_device *dev)
 186 {
 187         struct eth_device *d;
 188         static int index;
 189
 190         assert(strlen(dev->name) < sizeof(dev->name));
 191
 192         if (!eth_devices) {
 193                 eth_devices = dev;
 194                 eth_current = dev;
 195                 eth_current_changed();
 196         } else {
 197                 for (d = eth_devices; d->next != eth_devices; d = d->next)
 198                         ;
 199                 d->next = dev;
 200         }
 201
 202         dev->state = ETH_STATE_INIT;
 203         dev->next  = eth_devices;
 204         dev->index = index++;
 205
 206         return 0;
 207 }
 208
 209 int eth_unregister(struct eth_device *dev)
 210 {
 211         struct eth_device *cur;
 212
 213         /* No device */
 214         if (!eth_devices)
 215                 return -ENODEV;
 216
 217         for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
 218              cur = cur->next)
 219                 ;
 220
 221         /* Device not found */
 222         if (cur->next != dev)
 223                 return -ENODEV;
 224
 225         cur->next = dev->next;
 226
 227         if (eth_devices == dev)
 228                 eth_devices = dev->next == eth_devices ? NULL : dev->next;
 229
 230         if (eth_current == dev) {
 231                 eth_current = eth_devices;
 232                 eth_current_changed();
 233         }
 234
 235         return 0;
 236 }
 237
 238 int eth_initialize(void)
 239 {
 240         int num_devices = 0;
 241
 242         eth_devices = NULL;
 243         eth_current = NULL;
 244         eth_common_init();
 245         /*
 246          * If board-specific initialization exists, call it.
 247          * If not, call a CPU-specific one
 248          */
 249         if (board_eth_init != __def_eth_init) {
 250                 if (board_eth_init(gd->bd) < 0)
 251                         printf("Board Net Initialization Failed\n");
 252         } else if (cpu_eth_init != __def_eth_init) {
 253                 if (cpu_eth_init(gd->bd) < 0)
 254                         printf("CPU Net Initialization Failed\n");
 255         } else {
 256                 printf("Net Initialization Skipped\n");
 257         }
 258
 259         if (!eth_devices) {
 260                 puts("No ethernet found.\n");
 261                 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
 262         } else {
 263                 struct eth_device *dev = eth_devices;
 264                 char *ethprime = getenv("ethprime");
 265
 266                 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
 267                 do {
 268                         if (dev->index)
 269                                 puts(", ");
 270
 271                         printf("%s", dev->name);
 272
 273                         if (ethprime && strcmp(dev->name, ethprime) == 0) {
 274                                 eth_current = dev;
 275                                 puts(" [PRIME]");
 276                         }
 277
 278                         if (strchr(dev->name, ' '))
 279                                 puts("\nWarning: eth device name has a space!"
 280                                         "\n");
 281
 282                         eth_write_hwaddr(dev, "eth", dev->index);
 283
 284                         dev = dev->next;
 285                         num_devices++;
 286                 } while (dev != eth_devices);
 287
 288                 eth_current_changed();
 289                 putc('\n');
 290         }
 291
 292         return num_devices;
 293 }
 294
 295 #ifdef CONFIG_MCAST_TFTP
 296 /* Multicast.
 297  * mcast_addr: multicast ipaddr from which multicast Mac is made
 298  * join: 1=join, 0=leave.
 299  */
 300 int eth_mcast_join(struct in_addr mcast_ip, int join)
 301 {
 302         u8 mcast_mac[ARP_HLEN];
 303         if (!eth_current || !eth_current->mcast)
 304                 return -1;
 305         mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
 306         mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
 307         mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f;
 308         mcast_mac[2] = 0x5e;
 309         mcast_mac[1] = 0x0;
 310         mcast_mac[0] = 0x1;
 311         return eth_current->mcast(eth_current, mcast_mac, join);
 312 }
 313
 314 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 315  * and this is the ethernet-crc method needed for TSEC -- and perhaps
 316  * some other adapter -- hash tables
 317  */
 318 #define CRCPOLY_LE 0xedb88320
 319 u32 ether_crc(size_t len, unsigned char const *p)
 320 {
 321         int i;
 322         u32 crc;
 323         crc = ~0;
 324         while (len--) {
 325                 crc ^= *p++;
 326                 for (i = 0; i < 8; i++)
 327                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 328         }
 329         /* an reverse the bits, cuz of way they arrive -- last-first */
 330         crc = (crc >> 16) | (crc << 16);
 331         crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
 332         crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
 333         crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
 334         crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
 335         return crc;
 336 }
 337
 338 #endif
 339
 340
 341 int eth_init(void)
 342 {
 343         struct eth_device *old_current;
 344
 345         if (!eth_current) {
 346                 puts("No ethernet found.\n");
 347                 return -ENODEV;
 348         }
 349
 350         old_current = eth_current;
 351         do {
 352                 debug("Trying %s\n", eth_current->name);
 353
 354                 if (eth_current->init(eth_current, gd->bd) >= 0) {
 355                         eth_current->state = ETH_STATE_ACTIVE;
 356
 357                         return 0;
 358                 }
 359                 debug("FAIL\n");
 360
 361                 eth_try_another(0);
 362         } while (old_current != eth_current);
 363
 364         return -ETIMEDOUT;
 365 }
 366
 367 void eth_halt(void)
 368 {
 369         if (!eth_current)
 370                 return;
 371
 372         eth_current->halt(eth_current);
 373
 374         eth_current->state = ETH_STATE_PASSIVE;
 375 }
 376
 377 int eth_is_active(struct eth_device *dev)
 378 {
 379         return dev && dev->state == ETH_STATE_ACTIVE;
 380 }
 381
 382 int eth_send(void *packet, int length)
 383 {
 384         if (!eth_current)
 385                 return -ENODEV;
 386
 387         return eth_current->send(eth_current, packet, length);
 388 }
 389
 390 int eth_rx(void)
 391 {
 392         if (!eth_current)
 393                 return -ENODEV;
 394
 395         return eth_current->recv(eth_current);
 396 }
 397
 398 #ifdef CONFIG_API
 399 static void eth_save_packet(void *packet, int length)
 400 {
 401         char *p = packet;
 402         int i;
 403
 404         if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
 405                 return;
 406
 407         if (PKTSIZE < length)
 408                 return;
 409
 410         for (i = 0; i < length; i++)
 411                 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
 412
 413         eth_rcv_bufs[eth_rcv_last].length = length;
 414         eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
 415 }
 416
 417 int eth_receive(void *packet, int length)
 418 {
 419         char *p = packet;
 420         void *pp = push_packet;
 421         int i;
 422
 423         if (eth_rcv_current == eth_rcv_last) {
 424                 push_packet = eth_save_packet;
 425                 eth_rx();
 426                 push_packet = pp;
 427
 428                 if (eth_rcv_current == eth_rcv_last)
 429                         return -1;
 430         }
 431
 432         length = min(eth_rcv_bufs[eth_rcv_current].length, length);
 433
 434         for (i = 0; i < length; i++)
 435                 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
 436
 437         eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
 438         return length;
 439 }
 440 #endif /* CONFIG_API */