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);
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 = 0, eth_rcv_last = 0;
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)
148 return eth_current->index;
151 static void eth_current_changed(void)
153 char *act = getenv("ethact");
154 /* update current ethernet name */
156 if (act == NULL || strcmp(act, eth_current->name) != 0)
157 setenv("ethact", eth_current->name);
160 * remove the variable completely if there is no active
163 else if (act != NULL)
164 setenv("ethact", NULL);
167 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
170 unsigned char env_enetaddr[6];
173 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
175 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
176 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
177 memcmp(dev->enetaddr, env_enetaddr, 6)) {
178 printf("\nWarning: %s MAC addresses don't match:\n",
180 printf("Address in SROM is %pM\n",
182 printf("Address in environment is %pM\n",
186 memcpy(dev->enetaddr, env_enetaddr, 6);
189 if (dev->write_hwaddr &&
190 !eth_mac_skip(eth_number) &&
191 is_valid_ether_addr(dev->enetaddr)) {
192 ret = dev->write_hwaddr(dev);
198 int eth_register(struct eth_device *dev)
200 struct eth_device *d;
201 static int index = 0;
203 assert(strlen(dev->name) < sizeof(dev->name));
206 eth_current = eth_devices = dev;
207 eth_current_changed();
209 for (d=eth_devices; d->next!=eth_devices; d=d->next)
214 dev->state = ETH_STATE_INIT;
215 dev->next = eth_devices;
216 dev->index = index++;
221 int eth_unregister(struct eth_device *dev)
223 struct eth_device *cur;
229 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
233 /* Device not found */
234 if (cur->next != dev)
237 cur->next = dev->next;
239 if (eth_devices == dev)
240 eth_devices = dev->next == eth_devices ? NULL : dev->next;
242 if (eth_current == dev) {
243 eth_current = eth_devices;
244 eth_current_changed();
250 int eth_initialize(bd_t *bis)
256 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
257 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
266 * If board-specific initialization exists, call it.
267 * If not, call a CPU-specific one
269 if (board_eth_init != __def_eth_init) {
270 if (board_eth_init(bis) < 0)
271 printf("Board Net Initialization Failed\n");
272 } else if (cpu_eth_init != __def_eth_init) {
273 if (cpu_eth_init(bis) < 0)
274 printf("CPU Net Initialization Failed\n");
276 printf("Net Initialization Skipped\n");
279 puts ("No ethernet found.\n");
280 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
282 struct eth_device *dev = eth_devices;
283 char *ethprime = getenv ("ethprime");
285 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
290 printf("%s", dev->name);
292 if (ethprime && strcmp (dev->name, ethprime) == 0) {
297 if (strchr(dev->name, ' '))
298 puts("\nWarning: eth device name has a space!\n");
300 if (eth_write_hwaddr(dev, "eth", dev->index))
301 puts("\nWarning: failed to set MAC address\n");
305 } while(dev != eth_devices);
307 eth_current_changed();
314 #ifdef CONFIG_MCAST_TFTP
316 * mcast_addr: multicast ipaddr from which multicast Mac is made
317 * join: 1=join, 0=leave.
319 int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
322 if (!eth_current || !eth_current->mcast)
324 mcast_mac[5] = htonl(mcast_ip) & 0xff;
325 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
326 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
330 return eth_current->mcast(eth_current, mcast_mac, join);
333 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
334 * and this is the ethernet-crc method needed for TSEC -- and perhaps
335 * some other adapter -- hash tables
337 #define CRCPOLY_LE 0xedb88320
338 u32 ether_crc (size_t len, unsigned char const *p)
345 for (i = 0; i < 8; i++)
346 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
348 /* an reverse the bits, cuz of way they arrive -- last-first */
349 crc = (crc >> 16) | (crc << 16);
350 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
351 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
352 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
353 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
360 int eth_init(bd_t *bis)
362 struct eth_device *old_current, *dev;
365 puts ("No ethernet found.\n");
369 /* Sync environment with network devices */
372 uchar env_enetaddr[6];
374 if (eth_getenv_enetaddr_by_index("eth", dev->index,
376 memcpy(dev->enetaddr, env_enetaddr, 6);
379 } while (dev != eth_devices);
381 old_current = eth_current;
383 debug("Trying %s\n", eth_current->name);
385 if (eth_current->init(eth_current,bis) >= 0) {
386 eth_current->state = ETH_STATE_ACTIVE;
393 } while (old_current != eth_current);
403 eth_current->halt(eth_current);
405 eth_current->state = ETH_STATE_PASSIVE;
408 int eth_send(void *packet, int length)
413 return eth_current->send(eth_current, packet, length);
421 return eth_current->recv(eth_current);
425 static void eth_save_packet(void *packet, int length)
430 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
433 if (PKTSIZE < length)
436 for (i = 0; i < length; i++)
437 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
439 eth_rcv_bufs[eth_rcv_last].length = length;
440 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
443 int eth_receive(void *packet, int length)
446 void *pp = push_packet;
449 if (eth_rcv_current == eth_rcv_last) {
450 push_packet = eth_save_packet;
454 if (eth_rcv_current == eth_rcv_last)
458 if (length < eth_rcv_bufs[eth_rcv_current].length)
461 length = eth_rcv_bufs[eth_rcv_current].length;
463 for (i = 0; i < length; i++)
464 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
466 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
469 #endif /* CONFIG_API */
471 void eth_try_another(int first_restart)
473 static struct eth_device *first_failed = NULL;
477 * Do not rotate between network interfaces when
478 * 'ethrotate' variable is set to 'no'.
480 if (((ethrotate = getenv ("ethrotate")) != NULL) &&
481 (strcmp(ethrotate, "no") == 0))
488 first_failed = eth_current;
491 eth_current = eth_current->next;
493 eth_current_changed();
495 if (first_failed == eth_current) {
500 void eth_set_current(void)
502 static char *act = NULL;
503 static int env_changed_id = 0;
504 struct eth_device* old_current;
507 if (!eth_current) /* XXX no current */
510 env_id = get_env_id();
511 if ((act == NULL) || (env_changed_id != env_id)) {
512 act = getenv("ethact");
513 env_changed_id = env_id;
516 old_current = eth_current;
518 if (strcmp(eth_current->name, act) == 0)
520 eth_current = eth_current->next;
521 } while (old_current != eth_current);
524 eth_current_changed();
527 char *eth_get_name (void)
529 return (eth_current ? eth_current->name : "unknown");