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 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;
125 struct eth_device *eth_current;
127 struct eth_device *eth_get_dev_by_name(const char *devname)
129 struct eth_device *dev, *target_dev;
131 BUG_ON(devname == NULL);
139 if (strcmp(devname, dev->name) == 0) {
144 } while (dev != eth_devices);
149 struct eth_device *eth_get_dev_by_index(int index)
151 struct eth_device *dev, *target_dev;
159 if (dev->index == index) {
164 } while (dev != eth_devices);
169 int eth_get_dev_index(void)
174 return eth_current->index;
177 static void eth_current_changed(void)
179 char *act = getenv("ethact");
180 /* update current ethernet name */
182 if (act == NULL || strcmp(act, eth_current->name) != 0)
183 setenv("ethact", eth_current->name);
186 * remove the variable completely if there is no active
189 else if (act != NULL)
190 setenv("ethact", NULL);
193 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
196 unsigned char env_enetaddr[6];
199 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
201 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
202 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
203 memcmp(dev->enetaddr, env_enetaddr, 6)) {
204 printf("\nWarning: %s MAC addresses don't match:\n",
206 printf("Address in SROM is %pM\n",
208 printf("Address in environment is %pM\n",
212 memcpy(dev->enetaddr, env_enetaddr, 6);
213 } else if (is_valid_ether_addr(dev->enetaddr)) {
214 eth_setenv_enetaddr_by_index(base_name, eth_number,
216 printf("\nWarning: %s using MAC address from net device\n",
220 if (dev->write_hwaddr &&
221 !eth_mac_skip(eth_number) &&
222 is_valid_ether_addr(dev->enetaddr))
223 ret = dev->write_hwaddr(dev);
228 int eth_register(struct eth_device *dev)
230 struct eth_device *d;
233 assert(strlen(dev->name) < sizeof(dev->name));
236 eth_current = eth_devices = dev;
237 eth_current_changed();
239 for (d = eth_devices; d->next != eth_devices; d = d->next)
244 dev->state = ETH_STATE_INIT;
245 dev->next = eth_devices;
246 dev->index = index++;
251 int eth_unregister(struct eth_device *dev)
253 struct eth_device *cur;
259 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
263 /* Device not found */
264 if (cur->next != dev)
267 cur->next = dev->next;
269 if (eth_devices == dev)
270 eth_devices = dev->next == eth_devices ? NULL : dev->next;
272 if (eth_current == dev) {
273 eth_current = eth_devices;
274 eth_current_changed();
280 static void eth_env_init(bd_t *bis)
284 if ((s = getenv("bootfile")) != NULL)
285 copy_filename(BootFile, s, sizeof(BootFile));
288 int eth_initialize(bd_t *bis)
294 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
295 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
306 * If board-specific initialization exists, call it.
307 * If not, call a CPU-specific one
309 if (board_eth_init != __def_eth_init) {
310 if (board_eth_init(bis) < 0)
311 printf("Board Net Initialization Failed\n");
312 } else if (cpu_eth_init != __def_eth_init) {
313 if (cpu_eth_init(bis) < 0)
314 printf("CPU Net Initialization Failed\n");
316 printf("Net Initialization Skipped\n");
319 puts("No ethernet found.\n");
320 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
322 struct eth_device *dev = eth_devices;
323 char *ethprime = getenv("ethprime");
325 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
330 printf("%s", dev->name);
332 if (ethprime && strcmp(dev->name, ethprime) == 0) {
337 if (strchr(dev->name, ' '))
338 puts("\nWarning: eth device name has a space!"
341 if (eth_write_hwaddr(dev, "eth", dev->index))
342 puts("\nWarning: failed to set MAC address\n");
346 } while (dev != eth_devices);
348 eth_current_changed();
355 #ifdef CONFIG_MCAST_TFTP
357 * mcast_addr: multicast ipaddr from which multicast Mac is made
358 * join: 1=join, 0=leave.
360 int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
363 if (!eth_current || !eth_current->mcast)
365 mcast_mac[5] = htonl(mcast_ip) & 0xff;
366 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
367 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
371 return eth_current->mcast(eth_current, mcast_mac, join);
374 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
375 * and this is the ethernet-crc method needed for TSEC -- and perhaps
376 * some other adapter -- hash tables
378 #define CRCPOLY_LE 0xedb88320
379 u32 ether_crc(size_t len, unsigned char const *p)
386 for (i = 0; i < 8; i++)
387 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
389 /* an reverse the bits, cuz of way they arrive -- last-first */
390 crc = (crc >> 16) | (crc << 16);
391 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
392 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
393 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
394 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
401 int eth_init(bd_t *bis)
403 struct eth_device *old_current, *dev;
406 puts("No ethernet found.\n");
410 /* Sync environment with network devices */
413 uchar env_enetaddr[6];
415 if (eth_getenv_enetaddr_by_index("eth", dev->index,
417 memcpy(dev->enetaddr, env_enetaddr, 6);
420 } while (dev != eth_devices);
422 old_current = eth_current;
424 debug("Trying %s\n", eth_current->name);
426 if (eth_current->init(eth_current, bis) >= 0) {
427 eth_current->state = ETH_STATE_ACTIVE;
434 } while (old_current != eth_current);
444 eth_current->halt(eth_current);
446 eth_current->state = ETH_STATE_PASSIVE;
449 int eth_send(void *packet, int length)
454 return eth_current->send(eth_current, packet, length);
462 return eth_current->recv(eth_current);
466 static void eth_save_packet(void *packet, int length)
471 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
474 if (PKTSIZE < length)
477 for (i = 0; i < length; i++)
478 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
480 eth_rcv_bufs[eth_rcv_last].length = length;
481 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
484 int eth_receive(void *packet, int length)
487 void *pp = push_packet;
490 if (eth_rcv_current == eth_rcv_last) {
491 push_packet = eth_save_packet;
495 if (eth_rcv_current == eth_rcv_last)
499 length = min(eth_rcv_bufs[eth_rcv_current].length, length);
501 for (i = 0; i < length; i++)
502 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
504 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
507 #endif /* CONFIG_API */
509 void eth_try_another(int first_restart)
511 static struct eth_device *first_failed;
515 * Do not rotate between network interfaces when
516 * 'ethrotate' variable is set to 'no'.
518 ethrotate = getenv("ethrotate");
519 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
526 first_failed = eth_current;
528 eth_current = eth_current->next;
530 eth_current_changed();
532 if (first_failed == eth_current)
536 void eth_set_current(void)
539 static int env_changed_id;
540 struct eth_device *old_current;
543 if (!eth_current) /* XXX no current */
546 env_id = get_env_id();
547 if ((act == NULL) || (env_changed_id != env_id)) {
548 act = getenv("ethact");
549 env_changed_id = env_id;
552 old_current = eth_current;
554 if (strcmp(eth_current->name, act) == 0)
556 eth_current = eth_current->next;
557 } while (old_current != eth_current);
560 eth_current_changed();
563 char *eth_get_name(void)
565 return eth_current ? eth_current->name : "unknown";