2 * (C) Copyright 2001-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/errno.h>
15 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
20 for (i = 0; i < 6; ++i) {
21 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
23 addr = (*end) ? end + 1 : end;
27 int eth_getenv_enetaddr(char *name, uchar *enetaddr)
29 eth_parse_enetaddr(getenv(name), enetaddr);
30 return is_valid_ether_addr(enetaddr);
33 int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
37 sprintf(buf, "%pM", enetaddr);
39 return setenv(name, buf);
42 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
46 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
47 return eth_getenv_enetaddr(enetvar, enetaddr);
50 static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
54 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
55 return eth_setenv_enetaddr(enetvar, enetaddr);
58 static void eth_env_init(void)
62 s = getenv("bootfile");
64 copy_filename(BootFile, s, sizeof(BootFile));
67 static int eth_mac_skip(int index)
71 sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
72 return ((skip_state = getenv(enetvar)) != NULL);
75 static void eth_current_changed(void);
78 * CPU and board-specific Ethernet initializations. Aliased function
79 * signals caller to move on
81 static int __def_eth_init(bd_t *bis)
85 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
86 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
92 } eth_rcv_bufs[PKTBUFSRX];
94 static unsigned int eth_rcv_current, eth_rcv_last;
97 static struct eth_device *eth_devices;
98 struct eth_device *eth_current;
100 static void eth_set_current_to_next(void)
102 eth_current = eth_current->next;
105 struct eth_device *eth_get_dev_by_name(const char *devname)
107 struct eth_device *dev, *target_dev;
109 BUG_ON(devname == NULL);
117 if (strcmp(devname, dev->name) == 0) {
122 } while (dev != eth_devices);
127 struct eth_device *eth_get_dev_by_index(int index)
129 struct eth_device *dev, *target_dev;
137 if (dev->index == index) {
142 } while (dev != eth_devices);
147 int eth_get_dev_index(void)
152 return eth_current->index;
155 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
158 unsigned char env_enetaddr[6];
161 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
163 if (!is_zero_ether_addr(env_enetaddr)) {
164 if (!is_zero_ether_addr(dev->enetaddr) &&
165 memcmp(dev->enetaddr, env_enetaddr, 6)) {
166 printf("\nWarning: %s MAC addresses don't match:\n",
168 printf("Address in SROM is %pM\n",
170 printf("Address in environment is %pM\n",
174 memcpy(dev->enetaddr, env_enetaddr, 6);
175 } else if (is_valid_ether_addr(dev->enetaddr)) {
176 eth_setenv_enetaddr_by_index(base_name, eth_number,
178 printf("\nWarning: %s using MAC address from net device\n",
180 } else if (is_zero_ether_addr(dev->enetaddr)) {
181 printf("\nError: %s address not set.\n",
186 if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
187 if (!is_valid_ether_addr(dev->enetaddr)) {
188 printf("\nError: %s address %pM illegal value\n",
189 dev->name, dev->enetaddr);
193 ret = dev->write_hwaddr(dev);
195 printf("\nWarning: %s failed to set MAC address\n", dev->name);
201 int eth_register(struct eth_device *dev)
203 struct eth_device *d;
206 assert(strlen(dev->name) < sizeof(dev->name));
209 eth_current = eth_devices = dev;
210 eth_current_changed();
212 for (d = eth_devices; d->next != eth_devices; d = d->next)
217 dev->state = ETH_STATE_INIT;
218 dev->next = eth_devices;
219 dev->index = index++;
224 int eth_unregister(struct eth_device *dev)
226 struct eth_device *cur;
232 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
236 /* Device not found */
237 if (cur->next != dev)
240 cur->next = dev->next;
242 if (eth_devices == dev)
243 eth_devices = dev->next == eth_devices ? NULL : dev->next;
245 if (eth_current == dev) {
246 eth_current = eth_devices;
247 eth_current_changed();
253 int eth_initialize(bd_t *bis)
259 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
260 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
271 * If board-specific initialization exists, call it.
272 * If not, call a CPU-specific one
274 if (board_eth_init != __def_eth_init) {
275 if (board_eth_init(bis) < 0)
276 printf("Board Net Initialization Failed\n");
277 } else if (cpu_eth_init != __def_eth_init) {
278 if (cpu_eth_init(bis) < 0)
279 printf("CPU Net Initialization Failed\n");
281 printf("Net Initialization Skipped\n");
284 puts("No ethernet found.\n");
285 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
287 struct eth_device *dev = eth_devices;
288 char *ethprime = getenv("ethprime");
290 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
295 printf("%s", dev->name);
297 if (ethprime && strcmp(dev->name, ethprime) == 0) {
302 if (strchr(dev->name, ' '))
303 puts("\nWarning: eth device name has a space!"
306 eth_write_hwaddr(dev, "eth", dev->index);
310 } while (dev != eth_devices);
312 eth_current_changed();
319 #ifdef CONFIG_MCAST_TFTP
321 * mcast_addr: multicast ipaddr from which multicast Mac is made
322 * join: 1=join, 0=leave.
324 int eth_mcast_join(IPaddr_t mcast_ip, int join)
327 if (!eth_current || !eth_current->mcast)
329 mcast_mac[5] = htonl(mcast_ip) & 0xff;
330 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
331 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
335 return eth_current->mcast(eth_current, mcast_mac, join);
338 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
339 * and this is the ethernet-crc method needed for TSEC -- and perhaps
340 * some other adapter -- hash tables
342 #define CRCPOLY_LE 0xedb88320
343 u32 ether_crc(size_t len, unsigned char const *p)
350 for (i = 0; i < 8; i++)
351 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
353 /* an reverse the bits, cuz of way they arrive -- last-first */
354 crc = (crc >> 16) | (crc << 16);
355 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
356 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
357 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
358 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
365 int eth_init(bd_t *bis)
367 struct eth_device *old_current, *dev;
370 puts("No ethernet found.\n");
374 /* Sync environment with network devices */
377 uchar env_enetaddr[6];
379 if (eth_getenv_enetaddr_by_index("eth", dev->index,
381 memcpy(dev->enetaddr, env_enetaddr, 6);
384 } while (dev != eth_devices);
386 old_current = eth_current;
388 debug("Trying %s\n", eth_current->name);
390 if (eth_current->init(eth_current, bis) >= 0) {
391 eth_current->state = ETH_STATE_ACTIVE;
398 } while (old_current != eth_current);
408 eth_current->halt(eth_current);
410 eth_current->state = ETH_STATE_PASSIVE;
413 int eth_send(void *packet, int length)
418 return eth_current->send(eth_current, packet, length);
426 return eth_current->recv(eth_current);
430 static void eth_save_packet(void *packet, int length)
435 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
438 if (PKTSIZE < length)
441 for (i = 0; i < length; i++)
442 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
444 eth_rcv_bufs[eth_rcv_last].length = length;
445 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
448 int eth_receive(void *packet, int length)
451 void *pp = push_packet;
454 if (eth_rcv_current == eth_rcv_last) {
455 push_packet = eth_save_packet;
459 if (eth_rcv_current == eth_rcv_last)
463 length = min(eth_rcv_bufs[eth_rcv_current].length, length);
465 for (i = 0; i < length; i++)
466 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
468 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
471 #endif /* CONFIG_API */
473 static void eth_current_changed(void)
475 char *act = getenv("ethact");
476 /* update current ethernet name */
478 if (act == NULL || strcmp(act, eth_get_name()) != 0)
479 setenv("ethact", eth_get_name());
482 * remove the variable completely if there is no active
485 else if (act != NULL)
486 setenv("ethact", NULL);
489 void eth_try_another(int first_restart)
491 static struct eth_device *first_failed;
495 * Do not rotate between network interfaces when
496 * 'ethrotate' variable is set to 'no'.
498 ethrotate = getenv("ethrotate");
499 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
506 first_failed = eth_get_dev();
508 eth_set_current_to_next();
510 eth_current_changed();
512 if (first_failed == eth_get_dev())
516 void eth_set_current(void)
519 static int env_changed_id;
520 struct eth_device *old_current;
523 if (!eth_get_dev()) /* XXX no current */
526 env_id = get_env_id();
527 if ((act == NULL) || (env_changed_id != env_id)) {
528 act = getenv("ethact");
529 env_changed_id = env_id;
532 old_current = eth_get_dev();
534 if (strcmp(eth_get_name(), act) == 0)
536 eth_set_current_to_next();
537 } while (old_current != eth_get_dev());
540 eth_current_changed();
543 const char *eth_get_name(void)
545 return eth_get_dev() ? eth_get_dev()->name : "unknown";