2 * (C) Copyright 2001-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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 int eth_mac_skip(int index)
69 sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
70 return ((skip_state = getenv(enetvar)) != NULL);
73 #ifdef CONFIG_RANDOM_MACADDR
74 void eth_random_enetaddr(uchar *enetaddr)
81 enetaddr[0] = rval & 0xff;
82 enetaddr[1] = (rval >> 8) & 0xff;
83 enetaddr[2] = (rval >> 16) & 0xff;
86 enetaddr[3] = rval & 0xff;
87 enetaddr[4] = (rval >> 8) & 0xff;
88 enetaddr[5] = (rval >> 16) & 0xff;
90 /* make sure it's local and unicast */
91 enetaddr[0] = (enetaddr[0] | 0x02) & ~0x01;
96 * CPU and board-specific Ethernet initializations. Aliased function
97 * signals caller to move on
99 static int __def_eth_init(bd_t *bis)
103 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
104 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
110 } eth_rcv_bufs[PKTBUFSRX];
112 static unsigned int eth_rcv_current, eth_rcv_last;
115 static struct eth_device *eth_devices, *eth_current;
117 struct eth_device *eth_get_dev(void)
122 struct eth_device *eth_get_dev_by_name(const char *devname)
124 struct eth_device *dev, *target_dev;
126 BUG_ON(devname == NULL);
134 if (strcmp(devname, dev->name) == 0) {
139 } while (dev != eth_devices);
144 struct eth_device *eth_get_dev_by_index(int index)
146 struct eth_device *dev, *target_dev;
154 if (dev->index == index) {
159 } while (dev != eth_devices);
164 int eth_get_dev_index(void)
169 return eth_current->index;
172 static void eth_current_changed(void)
174 char *act = getenv("ethact");
175 /* update current ethernet name */
177 if (act == NULL || strcmp(act, eth_current->name) != 0)
178 setenv("ethact", eth_current->name);
181 * remove the variable completely if there is no active
184 else if (act != NULL)
185 setenv("ethact", NULL);
188 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
191 unsigned char env_enetaddr[6];
194 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
196 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
197 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
198 memcmp(dev->enetaddr, env_enetaddr, 6)) {
199 printf("\nWarning: %s MAC addresses don't match:\n",
201 printf("Address in SROM is %pM\n",
203 printf("Address in environment is %pM\n",
207 memcpy(dev->enetaddr, env_enetaddr, 6);
210 if (dev->write_hwaddr &&
211 !eth_mac_skip(eth_number) &&
212 is_valid_ether_addr(dev->enetaddr))
213 ret = dev->write_hwaddr(dev);
218 int eth_register(struct eth_device *dev)
220 struct eth_device *d;
223 assert(strlen(dev->name) < sizeof(dev->name));
226 eth_current = eth_devices = dev;
227 eth_current_changed();
229 for (d = eth_devices; d->next != eth_devices; d = d->next)
234 dev->state = ETH_STATE_INIT;
235 dev->next = eth_devices;
236 dev->index = index++;
241 int eth_unregister(struct eth_device *dev)
243 struct eth_device *cur;
249 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
253 /* Device not found */
254 if (cur->next != dev)
257 cur->next = dev->next;
259 if (eth_devices == dev)
260 eth_devices = dev->next == eth_devices ? NULL : dev->next;
262 if (eth_current == dev) {
263 eth_current = eth_devices;
264 eth_current_changed();
270 static void eth_env_init(bd_t *bis)
274 if ((s = getenv("bootfile")) != NULL)
275 copy_filename(BootFile, s, sizeof(BootFile));
278 int eth_initialize(bd_t *bis)
284 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
285 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
296 * If board-specific initialization exists, call it.
297 * If not, call a CPU-specific one
299 if (board_eth_init != __def_eth_init) {
300 if (board_eth_init(bis) < 0)
301 printf("Board Net Initialization Failed\n");
302 } else if (cpu_eth_init != __def_eth_init) {
303 if (cpu_eth_init(bis) < 0)
304 printf("CPU Net Initialization Failed\n");
306 printf("Net Initialization Skipped\n");
309 puts("No ethernet found.\n");
310 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
312 struct eth_device *dev = eth_devices;
313 char *ethprime = getenv("ethprime");
315 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
320 printf("%s", dev->name);
322 if (ethprime && strcmp(dev->name, ethprime) == 0) {
327 if (strchr(dev->name, ' '))
328 puts("\nWarning: eth device name has a space!"
331 if (eth_write_hwaddr(dev, "eth", dev->index))
332 puts("\nWarning: failed to set MAC address\n");
336 } while (dev != eth_devices);
338 eth_current_changed();
345 #ifdef CONFIG_MCAST_TFTP
347 * mcast_addr: multicast ipaddr from which multicast Mac is made
348 * join: 1=join, 0=leave.
350 int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
353 if (!eth_current || !eth_current->mcast)
355 mcast_mac[5] = htonl(mcast_ip) & 0xff;
356 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
357 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
361 return eth_current->mcast(eth_current, mcast_mac, join);
364 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
365 * and this is the ethernet-crc method needed for TSEC -- and perhaps
366 * some other adapter -- hash tables
368 #define CRCPOLY_LE 0xedb88320
369 u32 ether_crc(size_t len, unsigned char const *p)
376 for (i = 0; i < 8; i++)
377 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
379 /* an reverse the bits, cuz of way they arrive -- last-first */
380 crc = (crc >> 16) | (crc << 16);
381 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
382 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
383 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
384 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
391 int eth_init(bd_t *bis)
393 struct eth_device *old_current, *dev;
396 puts("No ethernet found.\n");
400 /* Sync environment with network devices */
403 uchar env_enetaddr[6];
405 if (eth_getenv_enetaddr_by_index("eth", dev->index,
407 memcpy(dev->enetaddr, env_enetaddr, 6);
410 } while (dev != eth_devices);
412 old_current = eth_current;
414 debug("Trying %s\n", eth_current->name);
416 if (eth_current->init(eth_current, bis) >= 0) {
417 eth_current->state = ETH_STATE_ACTIVE;
424 } while (old_current != eth_current);
434 eth_current->halt(eth_current);
436 eth_current->state = ETH_STATE_PASSIVE;
439 int eth_send(void *packet, int length)
444 return eth_current->send(eth_current, packet, length);
452 return eth_current->recv(eth_current);
456 static void eth_save_packet(void *packet, int length)
461 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
464 if (PKTSIZE < length)
467 for (i = 0; i < length; i++)
468 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
470 eth_rcv_bufs[eth_rcv_last].length = length;
471 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
474 int eth_receive(void *packet, int length)
477 void *pp = push_packet;
480 if (eth_rcv_current == eth_rcv_last) {
481 push_packet = eth_save_packet;
485 if (eth_rcv_current == eth_rcv_last)
489 if (length < eth_rcv_bufs[eth_rcv_current].length)
492 length = eth_rcv_bufs[eth_rcv_current].length;
494 for (i = 0; i < length; i++)
495 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
497 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
500 #endif /* CONFIG_API */
502 void eth_try_another(int first_restart)
504 static struct eth_device *first_failed;
508 * Do not rotate between network interfaces when
509 * 'ethrotate' variable is set to 'no'.
511 ethrotate = getenv("ethrotate");
512 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
519 first_failed = eth_current;
521 eth_current = eth_current->next;
523 eth_current_changed();
525 if (first_failed == eth_current)
529 void eth_set_current(void)
532 static int env_changed_id;
533 struct eth_device *old_current;
536 if (!eth_current) /* XXX no current */
539 env_id = get_env_id();
540 if ((act == NULL) || (env_changed_id != env_id)) {
541 act = getenv("ethact");
542 env_changed_id = env_id;
545 old_current = eth_current;
547 if (strcmp(eth_current->name, act) == 0)
549 eth_current = eth_current->next;
550 } while (old_current != eth_current);
553 eth_current_changed();
556 char *eth_get_name(void)
558 return eth_current ? eth_current->name : "unknown";