1 /*
2 * (C) Copyright 2001-2015
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 * Joe Hershberger, National Instruments
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <command.h>
11 #include <dm.h>
12 #include <environment.h>
13 #include <net.h>
14 #include <miiphy.h>
15 #include <phy.h>
16 #include <asm/errno.h>
17 #include <dm/device-internal.h>
18 #include <dm/uclass-internal.h>
19
20 DECLARE_GLOBAL_DATA_PTR;
21
eth_parse_enetaddr(const char * addr,uchar * enetaddr)22 void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
23 {
24 char *end;
25 int i;
26
27 for (i = 0; i < 6; ++i) {
28 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
29 if (addr)
30 addr = (*end) ? end + 1 : end;
31 }
32 }
33
eth_getenv_enetaddr(char * name,uchar * enetaddr)34 int eth_getenv_enetaddr(char *name, uchar *enetaddr)
35 {
36 eth_parse_enetaddr(getenv(name), enetaddr);
37 return is_valid_ethaddr(enetaddr);
38 }
39
eth_setenv_enetaddr(char * name,const uchar * enetaddr)40 int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
41 {
42 char buf[20];
43
44 sprintf(buf, "%pM", enetaddr);
45
46 return setenv(name, buf);
47 }
48
eth_getenv_enetaddr_by_index(const char * base_name,int index,uchar * enetaddr)49 int eth_getenv_enetaddr_by_index(const char *base_name, int index,
50 uchar *enetaddr)
51 {
52 char enetvar[32];
53 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
54 return eth_getenv_enetaddr(enetvar, enetaddr);
55 }
56
eth_setenv_enetaddr_by_index(const char * base_name,int index,uchar * enetaddr)57 static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
58 uchar *enetaddr)
59 {
60 char enetvar[32];
61 sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
62 return eth_setenv_enetaddr(enetvar, enetaddr);
63 }
64
eth_mac_skip(int index)65 static int eth_mac_skip(int index)
66 {
67 char enetvar[15];
68 char *skip_state;
69
70 sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
71 skip_state = getenv(enetvar);
72 return skip_state != NULL;
73 }
74
75 static void eth_current_changed(void);
76
77 /*
78 * CPU and board-specific Ethernet initializations. Aliased function
79 * signals caller to move on
80 */
__def_eth_init(bd_t * bis)81 static int __def_eth_init(bd_t *bis)
82 {
83 return -1;
84 }
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")));
87
eth_common_init(void)88 static void eth_common_init(void)
89 {
90 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
91 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
92 miiphy_init();
93 #endif
94
95 #ifdef CONFIG_PHYLIB
96 phy_init();
97 #endif
98
99 /*
100 * If board-specific initialization exists, call it.
101 * If not, call a CPU-specific one
102 */
103 if (board_eth_init != __def_eth_init) {
104 if (board_eth_init(gd->bd) < 0)
105 printf("Board Net Initialization Failed\n");
106 } else if (cpu_eth_init != __def_eth_init) {
107 if (cpu_eth_init(gd->bd) < 0)
108 printf("CPU Net Initialization Failed\n");
109 } else {
110 printf("Net Initialization Skipped\n");
111 }
112 }
113
114 #ifdef CONFIG_DM_ETH
115 /**
116 * struct eth_device_priv - private structure for each Ethernet device
117 *
118 * @state: The state of the Ethernet MAC driver (defined by enum eth_state_t)
119 */
120 struct eth_device_priv {
121 enum eth_state_t state;
122 };
123
124 /**
125 * struct eth_uclass_priv - The structure attached to the uclass itself
126 *
127 * @current: The Ethernet device that the network functions are using
128 */
129 struct eth_uclass_priv {
130 struct udevice *current;
131 };
132
133 /* eth_errno - This stores the most recent failure code from DM functions */
134 static int eth_errno;
135
eth_get_uclass_priv(void)136 static struct eth_uclass_priv *eth_get_uclass_priv(void)
137 {
138 struct uclass *uc;
139
140 uclass_get(UCLASS_ETH, &uc);
141 assert(uc);
142 return uc->priv;
143 }
144
eth_set_current_to_next(void)145 static void eth_set_current_to_next(void)
146 {
147 struct eth_uclass_priv *uc_priv;
148
149 uc_priv = eth_get_uclass_priv();
150 if (uc_priv->current)
151 uclass_next_device(&uc_priv->current);
152 if (!uc_priv->current)
153 uclass_first_device(UCLASS_ETH, &uc_priv->current);
154 }
155
156 /*
157 * Typically this will simply return the active device.
158 * In the case where the most recent active device was unset, this will attempt
159 * to return the first device. If that device doesn't exist or fails to probe,
160 * this function will return NULL.
161 */
eth_get_dev(void)162 struct udevice *eth_get_dev(void)
163 {
164 struct eth_uclass_priv *uc_priv;
165
166 uc_priv = eth_get_uclass_priv();
167 if (!uc_priv->current)
168 eth_errno = uclass_first_device(UCLASS_ETH,
169 &uc_priv->current);
170 return uc_priv->current;
171 }
172
173 /*
174 * Typically this will just store a device pointer.
175 * In case it was not probed, we will attempt to do so.
176 * dev may be NULL to unset the active device.
177 */
eth_set_dev(struct udevice * dev)178 static void eth_set_dev(struct udevice *dev)
179 {
180 if (dev && !device_active(dev))
181 eth_errno = device_probe(dev);
182 eth_get_uclass_priv()->current = dev;
183 }
184
185 /*
186 * Find the udevice that either has the name passed in as devname or has an
187 * alias named devname.
188 */
eth_get_dev_by_name(const char * devname)189 struct udevice *eth_get_dev_by_name(const char *devname)
190 {
191 int seq = -1;
192 char *endp = NULL;
193 const char *startp = NULL;
194 struct udevice *it;
195 struct uclass *uc;
196
197 /* Must be longer than 3 to be an alias */
198 if (strlen(devname) > strlen("eth")) {
199 startp = devname + strlen("eth");
200 seq = simple_strtoul(startp, &endp, 10);
201 }
202
203 uclass_get(UCLASS_ETH, &uc);
204 uclass_foreach_dev(it, uc) {
205 /*
206 * We need the seq to be valid, so try to probe it.
207 * If the probe fails, the seq will not match since it will be
208 * -1 instead of what we are looking for.
209 * We don't care about errors from probe here. Either they won't
210 * match an alias or it will match a literal name and we'll pick
211 * up the error when we try to probe again in eth_set_dev().
212 */
213 device_probe(it);
214 /*
215 * Check for the name or the sequence number to match
216 */
217 if (strcmp(it->name, devname) == 0 ||
218 (endp > startp && it->seq == seq))
219 return it;
220 }
221
222 return NULL;
223 }
224
eth_get_ethaddr(void)225 unsigned char *eth_get_ethaddr(void)
226 {
227 struct eth_pdata *pdata;
228
229 if (eth_get_dev()) {
230 pdata = eth_get_dev()->platdata;
231 return pdata->enetaddr;
232 }
233
234 return NULL;
235 }
236
237 /* Set active state without calling start on the driver */
eth_init_state_only(void)238 int eth_init_state_only(void)
239 {
240 struct udevice *current;
241 struct eth_device_priv *priv;
242
243 current = eth_get_dev();
244 if (!current || !device_active(current))
245 return -EINVAL;
246
247 priv = current->uclass_priv;
248 priv->state = ETH_STATE_ACTIVE;
249
250 return 0;
251 }
252
253 /* Set passive state without calling stop on the driver */
eth_halt_state_only(void)254 void eth_halt_state_only(void)
255 {
256 struct udevice *current;
257 struct eth_device_priv *priv;
258
259 current = eth_get_dev();
260 if (!current || !device_active(current))
261 return;
262
263 priv = current->uclass_priv;
264 priv->state = ETH_STATE_PASSIVE;
265 }
266
eth_get_dev_index(void)267 int eth_get_dev_index(void)
268 {
269 if (eth_get_dev())
270 return eth_get_dev()->seq;
271 return -1;
272 }
273
eth_write_hwaddr(struct udevice * dev)274 static int eth_write_hwaddr(struct udevice *dev)
275 {
276 struct eth_pdata *pdata = dev->platdata;
277 int ret = 0;
278
279 if (!dev || !device_active(dev))
280 return -EINVAL;
281
282 /* seq is valid since the device is active */
283 if (eth_get_ops(dev)->write_hwaddr && !eth_mac_skip(dev->seq)) {
284 if (!is_valid_ethaddr(pdata->enetaddr)) {
285 printf("\nError: %s address %pM illegal value\n",
286 dev->name, pdata->enetaddr);
287 return -EINVAL;
288 }
289
290 ret = eth_get_ops(dev)->write_hwaddr(dev);
291 if (ret)
292 printf("\nWarning: %s failed to set MAC address\n",
293 dev->name);
294 }
295
296 return ret;
297 }
298
on_ethaddr(const char * name,const char * value,enum env_op op,int flags)299 static int on_ethaddr(const char *name, const char *value, enum env_op op,
300 int flags)
301 {
302 int index;
303 int retval;
304 struct udevice *dev;
305
306 /* look for an index after "eth" */
307 index = simple_strtoul(name + 3, NULL, 10);
308
309 retval = uclass_find_device_by_seq(UCLASS_ETH, index, false, &dev);
310 if (!retval) {
311 struct eth_pdata *pdata = dev->platdata;
312 switch (op) {
313 case env_op_create:
314 case env_op_overwrite:
315 eth_parse_enetaddr(value, pdata->enetaddr);
316 break;
317 case env_op_delete:
318 memset(pdata->enetaddr, 0, 6);
319 }
320 }
321
322 return 0;
323 }
324 U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
325
eth_init(void)326 int eth_init(void)
327 {
328 struct udevice *current;
329 struct udevice *old_current;
330 int ret = -ENODEV;
331
332 current = eth_get_dev();
333 if (!current) {
334 printf("No ethernet found.\n");
335 return -ENODEV;
336 }
337
338 old_current = current;
339 do {
340 debug("Trying %s\n", current->name);
341
342 if (device_active(current)) {
343 ret = eth_get_ops(current)->start(current);
344 if (ret >= 0) {
345 struct eth_device_priv *priv =
346 current->uclass_priv;
347
348 priv->state = ETH_STATE_ACTIVE;
349 return 0;
350 }
351 } else {
352 ret = eth_errno;
353 }
354
355 debug("FAIL\n");
356
357 /*
358 * If ethrotate is enabled, this will change "current",
359 * otherwise we will drop out of this while loop immediately
360 */
361 eth_try_another(0);
362 /* This will ensure the new "current" attempted to probe */
363 current = eth_get_dev();
364 } while (old_current != current);
365
366 return ret;
367 }
368
eth_halt(void)369 void eth_halt(void)
370 {
371 struct udevice *current;
372 struct eth_device_priv *priv;
373
374 current = eth_get_dev();
375 if (!current || !device_active(current))
376 return;
377
378 eth_get_ops(current)->stop(current);
379 priv = current->uclass_priv;
380 priv->state = ETH_STATE_PASSIVE;
381 }
382
eth_send(void * packet,int length)383 int eth_send(void *packet, int length)
384 {
385 struct udevice *current;
386 int ret;
387
388 current = eth_get_dev();
389 if (!current)
390 return -ENODEV;
391
392 if (!device_active(current))
393 return -EINVAL;
394
395 ret = eth_get_ops(current)->send(current, packet, length);
396 if (ret < 0) {
397 /* We cannot completely return the error at present */
398 debug("%s: send() returned error %d\n", __func__, ret);
399 }
400 return ret;
401 }
402
eth_rx(void)403 int eth_rx(void)
404 {
405 struct udevice *current;
406 uchar *packet;
407 int ret;
408 int i;
409
410 current = eth_get_dev();
411 if (!current)
412 return -ENODEV;
413
414 if (!device_active(current))
415 return -EINVAL;
416
417 /* Process up to 32 packets at one time */
418 for (i = 0; i < 32; i++) {
419 ret = eth_get_ops(current)->recv(current, &packet);
420 if (ret > 0)
421 net_process_received_packet(packet, ret);
422 if (ret >= 0 && eth_get_ops(current)->free_pkt)
423 eth_get_ops(current)->free_pkt(current, packet, ret);
424 if (ret <= 0)
425 break;
426 }
427 if (ret == -EAGAIN)
428 ret = 0;
429 if (ret < 0) {
430 /* We cannot completely return the error at present */
431 debug("%s: recv() returned error %d\n", __func__, ret);
432 }
433 return ret;
434 }
435
eth_initialize(void)436 int eth_initialize(void)
437 {
438 int num_devices = 0;
439 struct udevice *dev;
440
441 eth_common_init();
442
443 /*
444 * Devices need to write the hwaddr even if not started so that Linux
445 * will have access to the hwaddr that u-boot stored for the device.
446 * This is accomplished by attempting to probe each device and calling
447 * their write_hwaddr() operation.
448 */
449 uclass_first_device(UCLASS_ETH, &dev);
450 if (!dev) {
451 printf("No ethernet found.\n");
452 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
453 } else {
454 char *ethprime = getenv("ethprime");
455 struct udevice *prime_dev = NULL;
456
457 if (ethprime)
458 prime_dev = eth_get_dev_by_name(ethprime);
459 if (prime_dev) {
460 eth_set_dev(prime_dev);
461 eth_current_changed();
462 } else {
463 eth_set_dev(NULL);
464 }
465
466 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
467 do {
468 if (num_devices)
469 printf(", ");
470
471 printf("eth%d: %s", dev->seq, dev->name);
472
473 if (ethprime && dev == prime_dev)
474 printf(" [PRIME]");
475
476 eth_write_hwaddr(dev);
477
478 uclass_next_device(&dev);
479 num_devices++;
480 } while (dev);
481
482 putc('\n');
483 }
484
485 return num_devices;
486 }
487
eth_post_bind(struct udevice * dev)488 static int eth_post_bind(struct udevice *dev)
489 {
490 if (strchr(dev->name, ' ')) {
491 printf("\nError: eth device name \"%s\" has a space!\n",
492 dev->name);
493 return -EINVAL;
494 }
495
496 return 0;
497 }
498
eth_pre_unbind(struct udevice * dev)499 static int eth_pre_unbind(struct udevice *dev)
500 {
501 /* Don't hang onto a pointer that is going away */
502 if (dev == eth_get_uclass_priv()->current)
503 eth_set_dev(NULL);
504
505 return 0;
506 }
507
eth_post_probe(struct udevice * dev)508 static int eth_post_probe(struct udevice *dev)
509 {
510 struct eth_device_priv *priv = dev->uclass_priv;
511 struct eth_pdata *pdata = dev->platdata;
512 unsigned char env_enetaddr[6];
513
514 priv->state = ETH_STATE_INIT;
515
516 /* Check if the device has a MAC address in ROM */
517 if (eth_get_ops(dev)->read_rom_hwaddr)
518 eth_get_ops(dev)->read_rom_hwaddr(dev);
519
520 eth_getenv_enetaddr_by_index("eth", dev->seq, env_enetaddr);
521 if (!is_zero_ethaddr(env_enetaddr)) {
522 if (!is_zero_ethaddr(pdata->enetaddr) &&
523 memcmp(pdata->enetaddr, env_enetaddr, 6)) {
524 printf("\nWarning: %s MAC addresses don't match:\n",
525 dev->name);
526 printf("Address in SROM is %pM\n",
527 pdata->enetaddr);
528 printf("Address in environment is %pM\n",
529 env_enetaddr);
530 }
531
532 /* Override the ROM MAC address */
533 memcpy(pdata->enetaddr, env_enetaddr, 6);
534 } else if (is_valid_ethaddr(pdata->enetaddr)) {
535 eth_setenv_enetaddr_by_index("eth", dev->seq, pdata->enetaddr);
536 printf("\nWarning: %s using MAC address from ROM\n",
537 dev->name);
538 } else if (is_zero_ethaddr(pdata->enetaddr)) {
539 #ifdef CONFIG_NET_RANDOM_ETHADDR
540 net_random_ethaddr(pdata->enetaddr);
541 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
542 dev->name, dev->seq, pdata->enetaddr);
543 #else
544 printf("\nError: %s address not set.\n",
545 dev->name);
546 return -EINVAL;
547 #endif
548 }
549
550 return 0;
551 }
552
eth_pre_remove(struct udevice * dev)553 static int eth_pre_remove(struct udevice *dev)
554 {
555 eth_get_ops(dev)->stop(dev);
556
557 return 0;
558 }
559
560 UCLASS_DRIVER(eth) = {
561 .name = "eth",
562 .id = UCLASS_ETH,
563 .post_bind = eth_post_bind,
564 .pre_unbind = eth_pre_unbind,
565 .post_probe = eth_post_probe,
566 .pre_remove = eth_pre_remove,
567 .priv_auto_alloc_size = sizeof(struct eth_uclass_priv),
568 .per_device_auto_alloc_size = sizeof(struct eth_device_priv),
569 .flags = DM_UC_FLAG_SEQ_ALIAS,
570 };
571 #endif
572
573 #ifndef CONFIG_DM_ETH
574
575 #ifdef CONFIG_API
576 static struct {
577 uchar data[PKTSIZE];
578 int length;
579 } eth_rcv_bufs[PKTBUFSRX];
580
581 static unsigned int eth_rcv_current, eth_rcv_last;
582 #endif
583
584 static struct eth_device *eth_devices;
585 struct eth_device *eth_current;
586
eth_set_current_to_next(void)587 static void eth_set_current_to_next(void)
588 {
589 eth_current = eth_current->next;
590 }
591
eth_set_dev(struct eth_device * dev)592 static void eth_set_dev(struct eth_device *dev)
593 {
594 eth_current = dev;
595 }
596
eth_get_dev_by_name(const char * devname)597 struct eth_device *eth_get_dev_by_name(const char *devname)
598 {
599 struct eth_device *dev, *target_dev;
600
601 BUG_ON(devname == NULL);
602
603 if (!eth_devices)
604 return NULL;
605
606 dev = eth_devices;
607 target_dev = NULL;
608 do {
609 if (strcmp(devname, dev->name) == 0) {
610 target_dev = dev;
611 break;
612 }
613 dev = dev->next;
614 } while (dev != eth_devices);
615
616 return target_dev;
617 }
618
eth_get_dev_by_index(int index)619 struct eth_device *eth_get_dev_by_index(int index)
620 {
621 struct eth_device *dev, *target_dev;
622
623 if (!eth_devices)
624 return NULL;
625
626 dev = eth_devices;
627 target_dev = NULL;
628 do {
629 if (dev->index == index) {
630 target_dev = dev;
631 break;
632 }
633 dev = dev->next;
634 } while (dev != eth_devices);
635
636 return target_dev;
637 }
638
eth_get_dev_index(void)639 int eth_get_dev_index(void)
640 {
641 if (!eth_current)
642 return -1;
643
644 return eth_current->index;
645 }
646
on_ethaddr(const char * name,const char * value,enum env_op op,int flags)647 static int on_ethaddr(const char *name, const char *value, enum env_op op,
648 int flags)
649 {
650 int index;
651 struct eth_device *dev;
652
653 if (!eth_devices)
654 return 0;
655
656 /* look for an index after "eth" */
657 index = simple_strtoul(name + 3, NULL, 10);
658
659 dev = eth_devices;
660 do {
661 if (dev->index == index) {
662 switch (op) {
663 case env_op_create:
664 case env_op_overwrite:
665 eth_parse_enetaddr(value, dev->enetaddr);
666 break;
667 case env_op_delete:
668 memset(dev->enetaddr, 0, 6);
669 }
670 }
671 } while (dev != eth_devices);
672
673 return 0;
674 }
675 U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
676
eth_write_hwaddr(struct eth_device * dev,const char * base_name,int eth_number)677 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
678 int eth_number)
679 {
680 unsigned char env_enetaddr[6];
681 int ret = 0;
682
683 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
684
685 if (!is_zero_ethaddr(env_enetaddr)) {
686 if (!is_zero_ethaddr(dev->enetaddr) &&
687 memcmp(dev->enetaddr, env_enetaddr, 6)) {
688 printf("\nWarning: %s MAC addresses don't match:\n",
689 dev->name);
690 printf("Address in SROM is %pM\n",
691 dev->enetaddr);
692 printf("Address in environment is %pM\n",
693 env_enetaddr);
694 }
695
696 memcpy(dev->enetaddr, env_enetaddr, 6);
697 } else if (is_valid_ethaddr(dev->enetaddr)) {
698 eth_setenv_enetaddr_by_index(base_name, eth_number,
699 dev->enetaddr);
700 printf("\nWarning: %s using MAC address from net device\n",
701 dev->name);
702 } else if (is_zero_ethaddr(dev->enetaddr)) {
703 #ifdef CONFIG_NET_RANDOM_ETHADDR
704 net_random_ethaddr(dev->enetaddr);
705 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
706 dev->name, eth_number, dev->enetaddr);
707 #else
708 printf("\nError: %s address not set.\n",
709 dev->name);
710 return -EINVAL;
711 #endif
712 }
713
714 if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
715 if (!is_valid_ethaddr(dev->enetaddr)) {
716 printf("\nError: %s address %pM illegal value\n",
717 dev->name, dev->enetaddr);
718 return -EINVAL;
719 }
720
721 ret = dev->write_hwaddr(dev);
722 if (ret)
723 printf("\nWarning: %s failed to set MAC address\n",
724 dev->name);
725 }
726
727 return ret;
728 }
729
eth_register(struct eth_device * dev)730 int eth_register(struct eth_device *dev)
731 {
732 struct eth_device *d;
733 static int index;
734
735 assert(strlen(dev->name) < sizeof(dev->name));
736
737 if (!eth_devices) {
738 eth_devices = dev;
739 eth_current = dev;
740 eth_current_changed();
741 } else {
742 for (d = eth_devices; d->next != eth_devices; d = d->next)
743 ;
744 d->next = dev;
745 }
746
747 dev->state = ETH_STATE_INIT;
748 dev->next = eth_devices;
749 dev->index = index++;
750
751 return 0;
752 }
753
eth_unregister(struct eth_device * dev)754 int eth_unregister(struct eth_device *dev)
755 {
756 struct eth_device *cur;
757
758 /* No device */
759 if (!eth_devices)
760 return -ENODEV;
761
762 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
763 cur = cur->next)
764 ;
765
766 /* Device not found */
767 if (cur->next != dev)
768 return -ENODEV;
769
770 cur->next = dev->next;
771
772 if (eth_devices == dev)
773 eth_devices = dev->next == eth_devices ? NULL : dev->next;
774
775 if (eth_current == dev) {
776 eth_current = eth_devices;
777 eth_current_changed();
778 }
779
780 return 0;
781 }
782
eth_initialize(void)783 int eth_initialize(void)
784 {
785 int num_devices = 0;
786
787 eth_devices = NULL;
788 eth_current = NULL;
789 eth_common_init();
790
791 if (!eth_devices) {
792 puts("No ethernet found.\n");
793 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
794 } else {
795 struct eth_device *dev = eth_devices;
796 char *ethprime = getenv("ethprime");
797
798 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
799 do {
800 if (dev->index)
801 puts(", ");
802
803 printf("%s", dev->name);
804
805 if (ethprime && strcmp(dev->name, ethprime) == 0) {
806 eth_current = dev;
807 puts(" [PRIME]");
808 }
809
810 if (strchr(dev->name, ' '))
811 puts("\nWarning: eth device name has a space!"
812 "\n");
813
814 eth_write_hwaddr(dev, "eth", dev->index);
815
816 dev = dev->next;
817 num_devices++;
818 } while (dev != eth_devices);
819
820 eth_current_changed();
821 putc('\n');
822 }
823
824 return num_devices;
825 }
826
827 #ifdef CONFIG_MCAST_TFTP
828 /* Multicast.
829 * mcast_addr: multicast ipaddr from which multicast Mac is made
830 * join: 1=join, 0=leave.
831 */
eth_mcast_join(struct in_addr mcast_ip,int join)832 int eth_mcast_join(struct in_addr mcast_ip, int join)
833 {
834 u8 mcast_mac[6];
835 if (!eth_current || !eth_current->mcast)
836 return -1;
837 mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
838 mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
839 mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f;
840 mcast_mac[2] = 0x5e;
841 mcast_mac[1] = 0x0;
842 mcast_mac[0] = 0x1;
843 return eth_current->mcast(eth_current, mcast_mac, join);
844 }
845
846 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
847 * and this is the ethernet-crc method needed for TSEC -- and perhaps
848 * some other adapter -- hash tables
849 */
850 #define CRCPOLY_LE 0xedb88320
ether_crc(size_t len,unsigned char const * p)851 u32 ether_crc(size_t len, unsigned char const *p)
852 {
853 int i;
854 u32 crc;
855 crc = ~0;
856 while (len--) {
857 crc ^= *p++;
858 for (i = 0; i < 8; i++)
859 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
860 }
861 /* an reverse the bits, cuz of way they arrive -- last-first */
862 crc = (crc >> 16) | (crc << 16);
863 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
864 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
865 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
866 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
867 return crc;
868 }
869
870 #endif
871
872
eth_init(void)873 int eth_init(void)
874 {
875 struct eth_device *old_current;
876
877 if (!eth_current) {
878 puts("No ethernet found.\n");
879 return -ENODEV;
880 }
881
882 old_current = eth_current;
883 do {
884 debug("Trying %s\n", eth_current->name);
885
886 if (eth_current->init(eth_current, gd->bd) >= 0) {
887 eth_current->state = ETH_STATE_ACTIVE;
888
889 return 0;
890 }
891 debug("FAIL\n");
892
893 eth_try_another(0);
894 } while (old_current != eth_current);
895
896 return -ETIMEDOUT;
897 }
898
eth_halt(void)899 void eth_halt(void)
900 {
901 if (!eth_current)
902 return;
903
904 eth_current->halt(eth_current);
905
906 eth_current->state = ETH_STATE_PASSIVE;
907 }
908
eth_send(void * packet,int length)909 int eth_send(void *packet, int length)
910 {
911 if (!eth_current)
912 return -ENODEV;
913
914 return eth_current->send(eth_current, packet, length);
915 }
916
eth_rx(void)917 int eth_rx(void)
918 {
919 if (!eth_current)
920 return -ENODEV;
921
922 return eth_current->recv(eth_current);
923 }
924 #endif /* ifndef CONFIG_DM_ETH */
925
926 #ifdef CONFIG_API
eth_save_packet(void * packet,int length)927 static void eth_save_packet(void *packet, int length)
928 {
929 char *p = packet;
930 int i;
931
932 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
933 return;
934
935 if (PKTSIZE < length)
936 return;
937
938 for (i = 0; i < length; i++)
939 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
940
941 eth_rcv_bufs[eth_rcv_last].length = length;
942 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
943 }
944
eth_receive(void * packet,int length)945 int eth_receive(void *packet, int length)
946 {
947 char *p = packet;
948 void *pp = push_packet;
949 int i;
950
951 if (eth_rcv_current == eth_rcv_last) {
952 push_packet = eth_save_packet;
953 eth_rx();
954 push_packet = pp;
955
956 if (eth_rcv_current == eth_rcv_last)
957 return -1;
958 }
959
960 length = min(eth_rcv_bufs[eth_rcv_current].length, length);
961
962 for (i = 0; i < length; i++)
963 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
964
965 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
966 return length;
967 }
968 #endif /* CONFIG_API */
969
eth_current_changed(void)970 static void eth_current_changed(void)
971 {
972 char *act = getenv("ethact");
973 /* update current ethernet name */
974 if (eth_get_dev()) {
975 if (act == NULL || strcmp(act, eth_get_name()) != 0)
976 setenv("ethact", eth_get_name());
977 }
978 /*
979 * remove the variable completely if there is no active
980 * interface
981 */
982 else if (act != NULL)
983 setenv("ethact", NULL);
984 }
985
eth_try_another(int first_restart)986 void eth_try_another(int first_restart)
987 {
988 static void *first_failed;
989 char *ethrotate;
990
991 /*
992 * Do not rotate between network interfaces when
993 * 'ethrotate' variable is set to 'no'.
994 */
995 ethrotate = getenv("ethrotate");
996 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
997 return;
998
999 if (!eth_get_dev())
1000 return;
1001
1002 if (first_restart)
1003 first_failed = eth_get_dev();
1004
1005 eth_set_current_to_next();
1006
1007 eth_current_changed();
1008
1009 if (first_failed == eth_get_dev())
1010 net_restart_wrap = 1;
1011 }
1012
eth_set_current(void)1013 void eth_set_current(void)
1014 {
1015 static char *act;
1016 static int env_changed_id;
1017 int env_id;
1018
1019 env_id = get_env_id();
1020 if ((act == NULL) || (env_changed_id != env_id)) {
1021 act = getenv("ethact");
1022 env_changed_id = env_id;
1023 }
1024
1025 if (act == NULL) {
1026 char *ethprime = getenv("ethprime");
1027 void *dev = NULL;
1028
1029 if (ethprime)
1030 dev = eth_get_dev_by_name(ethprime);
1031 if (dev)
1032 eth_set_dev(dev);
1033 else
1034 eth_set_dev(NULL);
1035 } else {
1036 eth_set_dev(eth_get_dev_by_name(act));
1037 }
1038
1039 eth_current_changed();
1040 }
1041
eth_get_name(void)1042 const char *eth_get_name(void)
1043 {
1044 return eth_get_dev() ? eth_get_dev()->name : "unknown";
1045 }
1046