2 * (C) Copyright 2001-2010
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
30 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
35 for (i = 0; i < 6; ++i) {
36 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
38 addr = (*end) ? end + 1 : end;
42 int eth_getenv_enetaddr(char *name, uchar *enetaddr)
44 eth_parse_enetaddr(getenv(name), enetaddr);
45 return is_valid_ether_addr(enetaddr);
48 int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
52 sprintf(buf, "%pM", enetaddr);
54 return setenv(name, buf);
57 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
61 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
62 return eth_getenv_enetaddr(enetvar, enetaddr);
65 static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
69 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
70 return eth_setenv_enetaddr(enetvar, enetaddr);
74 static int eth_mac_skip(int index)
78 sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
79 return ((skip_state = getenv(enetvar)) != NULL);
82 #ifdef CONFIG_RANDOM_MACADDR
83 void eth_random_enetaddr(uchar *enetaddr)
90 enetaddr[0] = rval & 0xff;
91 enetaddr[1] = (rval >> 8) & 0xff;
92 enetaddr[2] = (rval >> 16) & 0xff;
95 enetaddr[3] = rval & 0xff;
96 enetaddr[4] = (rval >> 8) & 0xff;
97 enetaddr[5] = (rval >> 16) & 0xff;
99 /* make sure it's local and unicast */
100 enetaddr[0] = (enetaddr[0] | 0x02) & ~0x01;
105 * CPU and board-specific Ethernet initializations. Aliased function
106 * signals caller to move on
108 static int __def_eth_init(bd_t *bis)
112 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
113 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
119 } eth_rcv_bufs[PKTBUFSRX];
121 static unsigned int eth_rcv_current, eth_rcv_last;
124 static struct eth_device *eth_devices, *eth_current;
126 struct eth_device *eth_get_dev(void)
131 struct eth_device *eth_get_dev_by_name(const char *devname)
133 struct eth_device *dev, *target_dev;
135 BUG_ON(devname == NULL);
143 if (strcmp(devname, dev->name) == 0) {
148 } while (dev != eth_devices);
153 struct eth_device *eth_get_dev_by_index(int index)
155 struct eth_device *dev, *target_dev;
163 if (dev->index == index) {
168 } while (dev != eth_devices);
173 int eth_get_dev_index(void)
178 return eth_current->index;
181 static void eth_current_changed(void)
183 char *act = getenv("ethact");
184 /* update current ethernet name */
186 if (act == NULL || strcmp(act, eth_current->name) != 0)
187 setenv("ethact", eth_current->name);
190 * remove the variable completely if there is no active
193 else if (act != NULL)
194 setenv("ethact", NULL);
197 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
200 unsigned char env_enetaddr[6];
203 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
205 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
206 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
207 memcmp(dev->enetaddr, env_enetaddr, 6)) {
208 printf("\nWarning: %s MAC addresses don't match:\n",
210 printf("Address in SROM is %pM\n",
212 printf("Address in environment is %pM\n",
216 memcpy(dev->enetaddr, env_enetaddr, 6);
217 } else if (is_valid_ether_addr(dev->enetaddr)) {
218 eth_setenv_enetaddr_by_index(base_name, eth_number,
220 printf("\nWarning: %s using MAC address from net device\n",
224 if (dev->write_hwaddr &&
225 !eth_mac_skip(eth_number) &&
226 is_valid_ether_addr(dev->enetaddr))
227 ret = dev->write_hwaddr(dev);
232 int eth_register(struct eth_device *dev)
234 struct eth_device *d;
237 assert(strlen(dev->name) < sizeof(dev->name));
240 eth_current = eth_devices = dev;
241 eth_current_changed();
243 for (d = eth_devices; d->next != eth_devices; d = d->next)
248 dev->state = ETH_STATE_INIT;
249 dev->next = eth_devices;
250 dev->index = index++;
255 int eth_unregister(struct eth_device *dev)
257 struct eth_device *cur;
263 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
267 /* Device not found */
268 if (cur->next != dev)
271 cur->next = dev->next;
273 if (eth_devices == dev)
274 eth_devices = dev->next == eth_devices ? NULL : dev->next;
276 if (eth_current == dev) {
277 eth_current = eth_devices;
278 eth_current_changed();
284 static void eth_env_init(bd_t *bis)
288 if ((s = getenv("bootfile")) != NULL)
289 copy_filename(BootFile, s, sizeof(BootFile));
292 int eth_initialize(bd_t *bis)
298 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
299 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
310 * If board-specific initialization exists, call it.
311 * If not, call a CPU-specific one
313 if (board_eth_init != __def_eth_init) {
314 if (board_eth_init(bis) < 0)
315 printf("Board Net Initialization Failed\n");
316 } else if (cpu_eth_init != __def_eth_init) {
317 if (cpu_eth_init(bis) < 0)
318 printf("CPU Net Initialization Failed\n");
320 printf("Net Initialization Skipped\n");
323 puts("No ethernet found.\n");
324 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
326 struct eth_device *dev = eth_devices;
327 char *ethprime = getenv("ethprime");
329 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
334 printf("%s", dev->name);
336 if (ethprime && strcmp(dev->name, ethprime) == 0) {
341 if (strchr(dev->name, ' '))
342 puts("\nWarning: eth device name has a space!"
345 if (eth_write_hwaddr(dev, "eth", dev->index))
346 puts("\nWarning: failed to set MAC address\n");
350 } while (dev != eth_devices);
352 eth_current_changed();
359 #ifdef CONFIG_MCAST_TFTP
361 * mcast_addr: multicast ipaddr from which multicast Mac is made
362 * join: 1=join, 0=leave.
364 int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
367 if (!eth_current || !eth_current->mcast)
369 mcast_mac[5] = htonl(mcast_ip) & 0xff;
370 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
371 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
375 return eth_current->mcast(eth_current, mcast_mac, join);
378 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
379 * and this is the ethernet-crc method needed for TSEC -- and perhaps
380 * some other adapter -- hash tables
382 #define CRCPOLY_LE 0xedb88320
383 u32 ether_crc(size_t len, unsigned char const *p)
390 for (i = 0; i < 8; i++)
391 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
393 /* an reverse the bits, cuz of way they arrive -- last-first */
394 crc = (crc >> 16) | (crc << 16);
395 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
396 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
397 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
398 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
405 int eth_init(bd_t *bis)
407 struct eth_device *old_current, *dev;
410 puts("No ethernet found.\n");
414 /* Sync environment with network devices */
417 uchar env_enetaddr[6];
419 if (eth_getenv_enetaddr_by_index("eth", dev->index,
421 memcpy(dev->enetaddr, env_enetaddr, 6);
424 } while (dev != eth_devices);
426 old_current = eth_current;
428 debug("Trying %s\n", eth_current->name);
430 if (eth_current->init(eth_current, bis) >= 0) {
431 eth_current->state = ETH_STATE_ACTIVE;
438 } while (old_current != eth_current);
448 eth_current->halt(eth_current);
450 eth_current->state = ETH_STATE_PASSIVE;
453 int eth_send(void *packet, int length)
458 return eth_current->send(eth_current, packet, length);
466 return eth_current->recv(eth_current);
470 static void eth_save_packet(void *packet, int length)
475 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
478 if (PKTSIZE < length)
481 for (i = 0; i < length; i++)
482 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
484 eth_rcv_bufs[eth_rcv_last].length = length;
485 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
488 int eth_receive(void *packet, int length)
491 void *pp = push_packet;
494 if (eth_rcv_current == eth_rcv_last) {
495 push_packet = eth_save_packet;
499 if (eth_rcv_current == eth_rcv_last)
503 if (length < eth_rcv_bufs[eth_rcv_current].length)
506 length = eth_rcv_bufs[eth_rcv_current].length;
508 for (i = 0; i < length; i++)
509 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
511 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
514 #endif /* CONFIG_API */
516 void eth_try_another(int first_restart)
518 static struct eth_device *first_failed;
522 * Do not rotate between network interfaces when
523 * 'ethrotate' variable is set to 'no'.
525 ethrotate = getenv("ethrotate");
526 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
533 first_failed = eth_current;
535 eth_current = eth_current->next;
537 eth_current_changed();
539 if (first_failed == eth_current)
543 void eth_set_current(void)
546 static int env_changed_id;
547 struct eth_device *old_current;
550 if (!eth_current) /* XXX no current */
553 env_id = get_env_id();
554 if ((act == NULL) || (env_changed_id != env_id)) {
555 act = getenv("ethact");
556 env_changed_id = env_id;
559 old_current = eth_current;
561 if (strcmp(eth_current->name, act) == 0)
563 eth_current = eth_current->next;
564 } while (old_current != eth_current);
567 eth_current_changed();
570 char *eth_get_name(void)
572 return eth_current ? eth_current->name : "unknown";