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 int eth_mac_skip(int index)
69 sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
70 return ((skip_state = getenv(enetvar)) != NULL);
74 * CPU and board-specific Ethernet initializations. Aliased function
75 * signals caller to move on
77 static int __def_eth_init(bd_t *bis)
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")));
88 } eth_rcv_bufs[PKTBUFSRX];
90 static unsigned int eth_rcv_current, eth_rcv_last;
93 static struct eth_device *eth_devices, *eth_current;
95 struct eth_device *eth_get_dev(void)
100 struct eth_device *eth_get_dev_by_name(const char *devname)
102 struct eth_device *dev, *target_dev;
104 BUG_ON(devname == NULL);
112 if (strcmp(devname, dev->name) == 0) {
117 } while (dev != eth_devices);
122 struct eth_device *eth_get_dev_by_index(int index)
124 struct eth_device *dev, *target_dev;
132 if (dev->index == index) {
137 } while (dev != eth_devices);
142 int eth_get_dev_index(void)
147 return eth_current->index;
150 static void eth_current_changed(void)
152 char *act = getenv("ethact");
153 /* update current ethernet name */
155 if (act == NULL || strcmp(act, eth_current->name) != 0)
156 setenv("ethact", eth_current->name);
159 * remove the variable completely if there is no active
162 else if (act != NULL)
163 setenv("ethact", NULL);
166 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
169 unsigned char env_enetaddr[6];
172 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
174 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
175 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
176 memcmp(dev->enetaddr, env_enetaddr, 6)) {
177 printf("\nWarning: %s MAC addresses don't match:\n",
179 printf("Address in SROM is %pM\n",
181 printf("Address in environment is %pM\n",
185 memcpy(dev->enetaddr, env_enetaddr, 6);
188 if (dev->write_hwaddr &&
189 !eth_mac_skip(eth_number) &&
190 is_valid_ether_addr(dev->enetaddr))
191 ret = dev->write_hwaddr(dev);
196 int eth_register(struct eth_device *dev)
198 struct eth_device *d;
201 assert(strlen(dev->name) < sizeof(dev->name));
204 eth_current = eth_devices = dev;
205 eth_current_changed();
207 for (d = eth_devices; d->next != eth_devices; d = d->next)
212 dev->state = ETH_STATE_INIT;
213 dev->next = eth_devices;
214 dev->index = index++;
219 int eth_unregister(struct eth_device *dev)
221 struct eth_device *cur;
227 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
231 /* Device not found */
232 if (cur->next != dev)
235 cur->next = dev->next;
237 if (eth_devices == dev)
238 eth_devices = dev->next == eth_devices ? NULL : dev->next;
240 if (eth_current == dev) {
241 eth_current = eth_devices;
242 eth_current_changed();
248 static void eth_env_init(bd_t *bis)
252 if ((s = getenv("bootfile")) != NULL)
253 copy_filename(BootFile, s, sizeof(BootFile));
256 int eth_initialize(bd_t *bis)
262 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
263 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
274 * If board-specific initialization exists, call it.
275 * If not, call a CPU-specific one
277 if (board_eth_init != __def_eth_init) {
278 if (board_eth_init(bis) < 0)
279 printf("Board Net Initialization Failed\n");
280 } else if (cpu_eth_init != __def_eth_init) {
281 if (cpu_eth_init(bis) < 0)
282 printf("CPU Net Initialization Failed\n");
284 printf("Net Initialization Skipped\n");
287 puts("No ethernet found.\n");
288 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
290 struct eth_device *dev = eth_devices;
291 char *ethprime = getenv("ethprime");
293 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
298 printf("%s", dev->name);
300 if (ethprime && strcmp(dev->name, ethprime) == 0) {
305 if (strchr(dev->name, ' '))
306 puts("\nWarning: eth device name has a space!"
309 if (eth_write_hwaddr(dev, "eth", dev->index))
310 puts("\nWarning: failed to set MAC address\n");
314 } while (dev != eth_devices);
316 eth_current_changed();
323 #ifdef CONFIG_MCAST_TFTP
325 * mcast_addr: multicast ipaddr from which multicast Mac is made
326 * join: 1=join, 0=leave.
328 int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
331 if (!eth_current || !eth_current->mcast)
333 mcast_mac[5] = htonl(mcast_ip) & 0xff;
334 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
335 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
339 return eth_current->mcast(eth_current, mcast_mac, join);
342 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
343 * and this is the ethernet-crc method needed for TSEC -- and perhaps
344 * some other adapter -- hash tables
346 #define CRCPOLY_LE 0xedb88320
347 u32 ether_crc(size_t len, unsigned char const *p)
354 for (i = 0; i < 8; i++)
355 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
357 /* an reverse the bits, cuz of way they arrive -- last-first */
358 crc = (crc >> 16) | (crc << 16);
359 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
360 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
361 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
362 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
369 int eth_init(bd_t *bis)
371 struct eth_device *old_current, *dev;
374 puts("No ethernet found.\n");
378 /* Sync environment with network devices */
381 uchar env_enetaddr[6];
383 if (eth_getenv_enetaddr_by_index("eth", dev->index,
385 memcpy(dev->enetaddr, env_enetaddr, 6);
388 } while (dev != eth_devices);
390 old_current = eth_current;
392 debug("Trying %s\n", eth_current->name);
394 if (eth_current->init(eth_current, bis) >= 0) {
395 eth_current->state = ETH_STATE_ACTIVE;
402 } while (old_current != eth_current);
412 eth_current->halt(eth_current);
414 eth_current->state = ETH_STATE_PASSIVE;
417 int eth_send(void *packet, int length)
422 return eth_current->send(eth_current, packet, length);
430 return eth_current->recv(eth_current);
434 static void eth_save_packet(void *packet, int length)
439 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
442 if (PKTSIZE < length)
445 for (i = 0; i < length; i++)
446 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
448 eth_rcv_bufs[eth_rcv_last].length = length;
449 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
452 int eth_receive(void *packet, int length)
455 void *pp = push_packet;
458 if (eth_rcv_current == eth_rcv_last) {
459 push_packet = eth_save_packet;
463 if (eth_rcv_current == eth_rcv_last)
467 if (length < eth_rcv_bufs[eth_rcv_current].length)
470 length = eth_rcv_bufs[eth_rcv_current].length;
472 for (i = 0; i < length; i++)
473 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
475 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
478 #endif /* CONFIG_API */
480 void eth_try_another(int first_restart)
482 static struct eth_device *first_failed;
486 * Do not rotate between network interfaces when
487 * 'ethrotate' variable is set to 'no'.
489 ethrotate = getenv("ethrotate");
490 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
497 first_failed = eth_current;
499 eth_current = eth_current->next;
501 eth_current_changed();
503 if (first_failed == eth_current)
507 void eth_set_current(void)
510 static int env_changed_id;
511 struct eth_device *old_current;
514 if (!eth_current) /* XXX no current */
517 env_id = get_env_id();
518 if ((act == NULL) || (env_changed_id != env_id)) {
519 act = getenv("ethact");
520 env_changed_id = env_id;
523 old_current = eth_current;
525 if (strcmp(eth_current->name, act) == 0)
527 eth_current = eth_current->next;
528 } while (old_current != eth_current);
531 eth_current_changed();
534 char *eth_get_name(void)
536 return eth_current ? eth_current->name : "unknown";