2 * (C) Copyright 2001-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
14 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
19 for (i = 0; i < 6; ++i) {
20 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
22 addr = (*end) ? end + 1 : end;
26 int eth_getenv_enetaddr(char *name, uchar *enetaddr)
28 eth_parse_enetaddr(getenv(name), enetaddr);
29 return is_valid_ether_addr(enetaddr);
32 int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
36 sprintf(buf, "%pM", enetaddr);
38 return setenv(name, buf);
41 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
45 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
46 return eth_getenv_enetaddr(enetvar, enetaddr);
49 static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
53 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
54 return eth_setenv_enetaddr(enetvar, enetaddr);
58 static int eth_mac_skip(int index)
62 sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
63 return ((skip_state = getenv(enetvar)) != NULL);
67 * CPU and board-specific Ethernet initializations. Aliased function
68 * signals caller to move on
70 static int __def_eth_init(bd_t *bis)
74 int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
75 int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
81 } eth_rcv_bufs[PKTBUFSRX];
83 static unsigned int eth_rcv_current, eth_rcv_last;
86 static struct eth_device *eth_devices;
87 struct eth_device *eth_current;
89 struct eth_device *eth_get_dev_by_name(const char *devname)
91 struct eth_device *dev, *target_dev;
93 BUG_ON(devname == NULL);
101 if (strcmp(devname, dev->name) == 0) {
106 } while (dev != eth_devices);
111 struct eth_device *eth_get_dev_by_index(int index)
113 struct eth_device *dev, *target_dev;
121 if (dev->index == index) {
126 } while (dev != eth_devices);
131 int eth_get_dev_index(void)
136 return eth_current->index;
139 static void eth_current_changed(void)
141 char *act = getenv("ethact");
142 /* update current ethernet name */
144 if (act == NULL || strcmp(act, eth_current->name) != 0)
145 setenv("ethact", eth_current->name);
148 * remove the variable completely if there is no active
151 else if (act != NULL)
152 setenv("ethact", NULL);
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 (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
164 if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
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",
182 if (dev->write_hwaddr &&
183 !eth_mac_skip(eth_number)) {
184 if (!is_valid_ether_addr(dev->enetaddr))
187 ret = dev->write_hwaddr(dev);
193 int eth_register(struct eth_device *dev)
195 struct eth_device *d;
198 assert(strlen(dev->name) < sizeof(dev->name));
201 eth_current = eth_devices = dev;
202 eth_current_changed();
204 for (d = eth_devices; d->next != eth_devices; d = d->next)
209 dev->state = ETH_STATE_INIT;
210 dev->next = eth_devices;
211 dev->index = index++;
216 int eth_unregister(struct eth_device *dev)
218 struct eth_device *cur;
224 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
228 /* Device not found */
229 if (cur->next != dev)
232 cur->next = dev->next;
234 if (eth_devices == dev)
235 eth_devices = dev->next == eth_devices ? NULL : dev->next;
237 if (eth_current == dev) {
238 eth_current = eth_devices;
239 eth_current_changed();
245 static void eth_env_init(bd_t *bis)
249 if ((s = getenv("bootfile")) != NULL)
250 copy_filename(BootFile, s, sizeof(BootFile));
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 if (eth_write_hwaddr(dev, "eth", dev->index))
307 puts("\nWarning: failed to set MAC address\n");
311 } while (dev != eth_devices);
313 eth_current_changed();
320 #ifdef CONFIG_MCAST_TFTP
322 * mcast_addr: multicast ipaddr from which multicast Mac is made
323 * join: 1=join, 0=leave.
325 int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
328 if (!eth_current || !eth_current->mcast)
330 mcast_mac[5] = htonl(mcast_ip) & 0xff;
331 mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
332 mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
336 return eth_current->mcast(eth_current, mcast_mac, join);
339 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
340 * and this is the ethernet-crc method needed for TSEC -- and perhaps
341 * some other adapter -- hash tables
343 #define CRCPOLY_LE 0xedb88320
344 u32 ether_crc(size_t len, unsigned char const *p)
351 for (i = 0; i < 8; i++)
352 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
354 /* an reverse the bits, cuz of way they arrive -- last-first */
355 crc = (crc >> 16) | (crc << 16);
356 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
357 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
358 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
359 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
366 int eth_init(bd_t *bis)
368 struct eth_device *old_current, *dev;
371 puts("No ethernet found.\n");
375 /* Sync environment with network devices */
378 uchar env_enetaddr[6];
380 if (eth_getenv_enetaddr_by_index("eth", dev->index,
382 memcpy(dev->enetaddr, env_enetaddr, 6);
385 } while (dev != eth_devices);
387 old_current = eth_current;
389 debug("Trying %s\n", eth_current->name);
391 if (eth_current->init(eth_current, bis) >= 0) {
392 eth_current->state = ETH_STATE_ACTIVE;
399 } while (old_current != eth_current);
409 eth_current->halt(eth_current);
411 eth_current->state = ETH_STATE_PASSIVE;
414 int eth_send(void *packet, int length)
419 return eth_current->send(eth_current, packet, length);
427 return eth_current->recv(eth_current);
431 static void eth_save_packet(void *packet, int length)
436 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
439 if (PKTSIZE < length)
442 for (i = 0; i < length; i++)
443 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
445 eth_rcv_bufs[eth_rcv_last].length = length;
446 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
449 int eth_receive(void *packet, int length)
452 void *pp = push_packet;
455 if (eth_rcv_current == eth_rcv_last) {
456 push_packet = eth_save_packet;
460 if (eth_rcv_current == eth_rcv_last)
464 length = min(eth_rcv_bufs[eth_rcv_current].length, length);
466 for (i = 0; i < length; i++)
467 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
469 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
472 #endif /* CONFIG_API */
474 void eth_try_another(int first_restart)
476 static struct eth_device *first_failed;
480 * Do not rotate between network interfaces when
481 * 'ethrotate' variable is set to 'no'.
483 ethrotate = getenv("ethrotate");
484 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
491 first_failed = eth_current;
493 eth_current = eth_current->next;
495 eth_current_changed();
497 if (first_failed == eth_current)
501 void eth_set_current(void)
504 static int env_changed_id;
505 struct eth_device *old_current;
508 if (!eth_current) /* XXX no current */
511 env_id = get_env_id();
512 if ((act == NULL) || (env_changed_id != env_id)) {
513 act = getenv("ethact");
514 env_changed_id = env_id;
517 old_current = eth_current;
519 if (strcmp(eth_current->name, act) == 0)
521 eth_current = eth_current->next;
522 } while (old_current != eth_current);
525 eth_current_changed();
528 char *eth_get_name(void)
530 return eth_current ? eth_current->name : "unknown";