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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
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
34 int eth_getenv_enetaddr(const char *name, uchar *enetaddr)
35 {
36 eth_parse_enetaddr(getenv(name), enetaddr);
37 return is_valid_ethaddr(enetaddr);
38 }
39
40 int eth_setenv_enetaddr(const char *name, const uchar *enetaddr)
41 {
42 char buf[20];
43
44 sprintf(buf, "%pM", enetaddr);
45
46 return setenv(name, buf);
47 }
48
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
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
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 */
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
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 #ifndef CONFIG_DM_ETH
111 printf("Net Initialization Skipped\n");
112 #endif
113 }
114 }
115
116 #ifdef CONFIG_DM_ETH
117 /**
118 * struct eth_device_priv - private structure for each Ethernet device
119 *
120 * @state: The state of the Ethernet MAC driver (defined by enum eth_state_t)
121 */
122 struct eth_device_priv {
123 enum eth_state_t state;
124 };
125
126 /**
127 * struct eth_uclass_priv - The structure attached to the uclass itself
128 *
129 * @current: The Ethernet device that the network functions are using
130 */
131 struct eth_uclass_priv {
132 struct udevice *current;
133 };
134
135 /* eth_errno - This stores the most recent failure code from DM functions */
136 static int eth_errno;
137
138 static struct eth_uclass_priv *eth_get_uclass_priv(void)
139 {
140 struct uclass *uc;
141
142 uclass_get(UCLASS_ETH, &uc);
143 assert(uc);
144 return uc->priv;
145 }
146
147 static void eth_set_current_to_next(void)
148 {
149 struct eth_uclass_priv *uc_priv;
150
151 uc_priv = eth_get_uclass_priv();
152 if (uc_priv->current)
153 uclass_next_device(&uc_priv->current);
154 if (!uc_priv->current)
155 uclass_first_device(UCLASS_ETH, &uc_priv->current);
156 }
157
158 /*
159 * Typically this will simply return the active device.
160 * In the case where the most recent active device was unset, this will attempt
161 * to return the first device. If that device doesn't exist or fails to probe,
162 * this function will return NULL.
163 */
164 struct udevice *eth_get_dev(void)
165 {
166 struct eth_uclass_priv *uc_priv;
167
168 uc_priv = eth_get_uclass_priv();
169 if (!uc_priv->current)
170 eth_errno = uclass_first_device(UCLASS_ETH,
171 &uc_priv->current);
172 return uc_priv->current;
173 }
174
175 /*
176 * Typically this will just store a device pointer.
177 * In case it was not probed, we will attempt to do so.
178 * dev may be NULL to unset the active device.
179 */
180 static void eth_set_dev(struct udevice *dev)
181 {
182 if (dev && !device_active(dev)) {
183 eth_errno = device_probe(dev);
184 if (eth_errno)
185 dev = NULL;
186 }
187
188 eth_get_uclass_priv()->current = dev;
189 }
190
191 /*
192 * Find the udevice that either has the name passed in as devname or has an
193 * alias named devname.
194 */
195 struct udevice *eth_get_dev_by_name(const char *devname)
196 {
197 int seq = -1;
198 char *endp = NULL;
199 const char *startp = NULL;
200 struct udevice *it;
201 struct uclass *uc;
202 int len = strlen("eth");
203
204 /* Must be longer than 3 to be an alias */
205 if (!strncmp(devname, "eth", len) && strlen(devname) > len) {
206 startp = devname + len;
207 seq = simple_strtoul(startp, &endp, 10);
208 }
209
210 uclass_get(UCLASS_ETH, &uc);
211 uclass_foreach_dev(it, uc) {
212 /*
213 * We need the seq to be valid, so try to probe it.
214 * If the probe fails, the seq will not match since it will be
215 * -1 instead of what we are looking for.
216 * We don't care about errors from probe here. Either they won't
217 * match an alias or it will match a literal name and we'll pick
218 * up the error when we try to probe again in eth_set_dev().
219 */
220 if (device_probe(it))
221 continue;
222 /* Check for the name or the sequence number to match */
223 if (strcmp(it->name, devname) == 0 ||
224 (endp > startp && it->seq == seq))
225 return it;
226 }
227
228 return NULL;
229 }
230
231 unsigned char *eth_get_ethaddr(void)
232 {
233 struct eth_pdata *pdata;
234
235 if (eth_get_dev()) {
236 pdata = eth_get_dev()->platdata;
237 return pdata->enetaddr;
238 }
239
240 return NULL;
241 }
242
243 /* Set active state without calling start on the driver */
244 int eth_init_state_only(void)
245 {
246 struct udevice *current;
247 struct eth_device_priv *priv;
248
249 current = eth_get_dev();
250 if (!current || !device_active(current))
251 return -EINVAL;
252
253 priv = current->uclass_priv;
254 priv->state = ETH_STATE_ACTIVE;
255
256 return 0;
257 }
258
259 /* Set passive state without calling stop on the driver */
260 void eth_halt_state_only(void)
261 {
262 struct udevice *current;
263 struct eth_device_priv *priv;
264
265 current = eth_get_dev();
266 if (!current || !device_active(current))
267 return;
268
269 priv = current->uclass_priv;
270 priv->state = ETH_STATE_PASSIVE;
271 }
272
273 int eth_get_dev_index(void)
274 {
275 if (eth_get_dev())
276 return eth_get_dev()->seq;
277 return -1;
278 }
279
280 static int eth_write_hwaddr(struct udevice *dev)
281 {
282 struct eth_pdata *pdata = dev->platdata;
283 int ret = 0;
284
285 if (!dev || !device_active(dev))
286 return -EINVAL;
287
288 /* seq is valid since the device is active */
289 if (eth_get_ops(dev)->write_hwaddr && !eth_mac_skip(dev->seq)) {
290 if (!is_valid_ethaddr(pdata->enetaddr)) {
291 printf("\nError: %s address %pM illegal value\n",
292 dev->name, pdata->enetaddr);
293 return -EINVAL;
294 }
295
296 /*
297 * Drivers are allowed to decide not to implement this at
298 * run-time. E.g. Some devices may use it and some may not.
299 */
300 ret = eth_get_ops(dev)->write_hwaddr(dev);
301 if (ret == -ENOSYS)
302 ret = 0;
303 if (ret)
304 printf("\nWarning: %s failed to set MAC address\n",
305 dev->name);
306 }
307
308 return ret;
309 }
310
311 static int on_ethaddr(const char *name, const char *value, enum env_op op,
312 int flags)
313 {
314 int index;
315 int retval;
316 struct udevice *dev;
317
318 /* look for an index after "eth" */
319 index = simple_strtoul(name + 3, NULL, 10);
320
321 retval = uclass_find_device_by_seq(UCLASS_ETH, index, false, &dev);
322 if (!retval) {
323 struct eth_pdata *pdata = dev->platdata;
324 switch (op) {
325 case env_op_create:
326 case env_op_overwrite:
327 eth_parse_enetaddr(value, pdata->enetaddr);
328 break;
329 case env_op_delete:
330 memset(pdata->enetaddr, 0, 6);
331 }
332 }
333
334 return 0;
335 }
336 U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
337
338 int eth_init(void)
339 {
340 char *ethact = getenv("ethact");
341 char *ethrotate = getenv("ethrotate");
342 struct udevice *current = NULL;
343 struct udevice *old_current;
344 int ret = -ENODEV;
345
346 /*
347 * When 'ethrotate' variable is set to 'no' and 'ethact' variable
348 * is already set to an ethernet device, we should stick to 'ethact'.
349 */
350 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0)) {
351 if (ethact) {
352 current = eth_get_dev_by_name(ethact);
353 if (!current)
354 return -EINVAL;
355 }
356 }
357
358 if (!current) {
359 current = eth_get_dev();
360 if (!current) {
361 printf("No ethernet found.\n");
362 return -ENODEV;
363 }
364 }
365
366 old_current = current;
367 do {
368 if (current) {
369 debug("Trying %s\n", current->name);
370
371 if (device_active(current)) {
372 ret = eth_get_ops(current)->start(current);
373 if (ret >= 0) {
374 struct eth_device_priv *priv =
375 current->uclass_priv;
376
377 priv->state = ETH_STATE_ACTIVE;
378 return 0;
379 }
380 } else {
381 ret = eth_errno;
382 }
383
384 debug("FAIL\n");
385 } else {
386 debug("PROBE FAIL\n");
387 }
388
389 /*
390 * If ethrotate is enabled, this will change "current",
391 * otherwise we will drop out of this while loop immediately
392 */
393 eth_try_another(0);
394 /* This will ensure the new "current" attempted to probe */
395 current = eth_get_dev();
396 } while (old_current != current);
397
398 return ret;
399 }
400
401 void eth_halt(void)
402 {
403 struct udevice *current;
404 struct eth_device_priv *priv;
405
406 current = eth_get_dev();
407 if (!current || !device_active(current))
408 return;
409
410 eth_get_ops(current)->stop(current);
411 priv = current->uclass_priv;
412 priv->state = ETH_STATE_PASSIVE;
413 }
414
415 int eth_is_active(struct udevice *dev)
416 {
417 struct eth_device_priv *priv;
418
419 if (!dev || !device_active(dev))
420 return 0;
421
422 priv = dev_get_uclass_priv(dev);
423 return priv->state == ETH_STATE_ACTIVE;
424 }
425
426 int eth_send(void *packet, int length)
427 {
428 struct udevice *current;
429 int ret;
430
431 current = eth_get_dev();
432 if (!current)
433 return -ENODEV;
434
435 if (!device_active(current))
436 return -EINVAL;
437
438 ret = eth_get_ops(current)->send(current, packet, length);
439 if (ret < 0) {
440 /* We cannot completely return the error at present */
441 debug("%s: send() returned error %d\n", __func__, ret);
442 }
443 return ret;
444 }
445
446 int eth_rx(void)
447 {
448 struct udevice *current;
449 uchar *packet;
450 int flags;
451 int ret;
452 int i;
453
454 current = eth_get_dev();
455 if (!current)
456 return -ENODEV;
457
458 if (!device_active(current))
459 return -EINVAL;
460
461 /* Process up to 32 packets at one time */
462 flags = ETH_RECV_CHECK_DEVICE;
463 for (i = 0; i < 32; i++) {
464 ret = eth_get_ops(current)->recv(current, flags, &packet);
465 flags = 0;
466 if (ret > 0)
467 net_process_received_packet(packet, ret);
468 if (ret >= 0 && eth_get_ops(current)->free_pkt)
469 eth_get_ops(current)->free_pkt(current, packet, ret);
470 if (ret <= 0)
471 break;
472 }
473 if (ret == -EAGAIN)
474 ret = 0;
475 if (ret < 0) {
476 /* We cannot completely return the error at present */
477 debug("%s: recv() returned error %d\n", __func__, ret);
478 }
479 return ret;
480 }
481
482 int eth_initialize(void)
483 {
484 int num_devices = 0;
485 struct udevice *dev;
486
487 eth_common_init();
488
489 /*
490 * Devices need to write the hwaddr even if not started so that Linux
491 * will have access to the hwaddr that u-boot stored for the device.
492 * This is accomplished by attempting to probe each device and calling
493 * their write_hwaddr() operation.
494 */
495 uclass_first_device(UCLASS_ETH, &dev);
496 if (!dev) {
497 printf("No ethernet found.\n");
498 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
499 } else {
500 char *ethprime = getenv("ethprime");
501 struct udevice *prime_dev = NULL;
502
503 if (ethprime)
504 prime_dev = eth_get_dev_by_name(ethprime);
505 if (prime_dev) {
506 eth_set_dev(prime_dev);
507 eth_current_changed();
508 } else {
509 eth_set_dev(NULL);
510 }
511
512 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
513 do {
514 if (num_devices)
515 printf(", ");
516
517 printf("eth%d: %s", dev->seq, dev->name);
518
519 if (ethprime && dev == prime_dev)
520 printf(" [PRIME]");
521
522 eth_write_hwaddr(dev);
523
524 uclass_next_device(&dev);
525 num_devices++;
526 } while (dev);
527
528 putc('\n');
529 }
530
531 return num_devices;
532 }
533
534 static int eth_post_bind(struct udevice *dev)
535 {
536 if (strchr(dev->name, ' ')) {
537 printf("\nError: eth device name \"%s\" has a space!\n",
538 dev->name);
539 return -EINVAL;
540 }
541
542 return 0;
543 }
544
545 static int eth_pre_unbind(struct udevice *dev)
546 {
547 /* Don't hang onto a pointer that is going away */
548 if (dev == eth_get_uclass_priv()->current)
549 eth_set_dev(NULL);
550
551 return 0;
552 }
553
554 static int eth_post_probe(struct udevice *dev)
555 {
556 struct eth_device_priv *priv = dev->uclass_priv;
557 struct eth_pdata *pdata = dev->platdata;
558 unsigned char env_enetaddr[6];
559
560 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
561 struct eth_ops *ops = eth_get_ops(dev);
562 static int reloc_done;
563
564 if (!reloc_done) {
565 if (ops->start)
566 ops->start += gd->reloc_off;
567 if (ops->send)
568 ops->send += gd->reloc_off;
569 if (ops->recv)
570 ops->recv += gd->reloc_off;
571 if (ops->free_pkt)
572 ops->free_pkt += gd->reloc_off;
573 if (ops->stop)
574 ops->stop += gd->reloc_off;
575 #ifdef CONFIG_MCAST_TFTP
576 if (ops->mcast)
577 ops->mcast += gd->reloc_off;
578 #endif
579 if (ops->write_hwaddr)
580 ops->write_hwaddr += gd->reloc_off;
581 if (ops->read_rom_hwaddr)
582 ops->read_rom_hwaddr += gd->reloc_off;
583
584 reloc_done++;
585 }
586 #endif
587
588 priv->state = ETH_STATE_INIT;
589
590 /* Check if the device has a MAC address in ROM */
591 if (eth_get_ops(dev)->read_rom_hwaddr)
592 eth_get_ops(dev)->read_rom_hwaddr(dev);
593
594 eth_getenv_enetaddr_by_index("eth", dev->seq, env_enetaddr);
595 if (!is_zero_ethaddr(env_enetaddr)) {
596 if (!is_zero_ethaddr(pdata->enetaddr) &&
597 memcmp(pdata->enetaddr, env_enetaddr, 6)) {
598 printf("\nWarning: %s MAC addresses don't match:\n",
599 dev->name);
600 printf("Address in SROM is %pM\n",
601 pdata->enetaddr);
602 printf("Address in environment is %pM\n",
603 env_enetaddr);
604 }
605
606 /* Override the ROM MAC address */
607 memcpy(pdata->enetaddr, env_enetaddr, 6);
608 } else if (is_valid_ethaddr(pdata->enetaddr)) {
609 eth_setenv_enetaddr_by_index("eth", dev->seq, pdata->enetaddr);
610 printf("\nWarning: %s using MAC address from ROM\n",
611 dev->name);
612 } else if (is_zero_ethaddr(pdata->enetaddr)) {
613 #ifdef CONFIG_NET_RANDOM_ETHADDR
614 net_random_ethaddr(pdata->enetaddr);
615 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
616 dev->name, dev->seq, pdata->enetaddr);
617 #else
618 printf("\nError: %s address not set.\n",
619 dev->name);
620 return -EINVAL;
621 #endif
622 }
623
624 return 0;
625 }
626
627 static int eth_pre_remove(struct udevice *dev)
628 {
629 struct eth_pdata *pdata = dev->platdata;
630
631 eth_get_ops(dev)->stop(dev);
632
633 /* clear the MAC address */
634 memset(pdata->enetaddr, 0, 6);
635
636 return 0;
637 }
638
639 UCLASS_DRIVER(eth) = {
640 .name = "eth",
641 .id = UCLASS_ETH,
642 .post_bind = eth_post_bind,
643 .pre_unbind = eth_pre_unbind,
644 .post_probe = eth_post_probe,
645 .pre_remove = eth_pre_remove,
646 .priv_auto_alloc_size = sizeof(struct eth_uclass_priv),
647 .per_device_auto_alloc_size = sizeof(struct eth_device_priv),
648 .flags = DM_UC_FLAG_SEQ_ALIAS,
649 };
650 #endif /* #ifdef CONFIG_DM_ETH */
651
652 #ifndef CONFIG_DM_ETH
653
654 #ifdef CONFIG_API
655 static struct {
656 uchar data[PKTSIZE];
657 int length;
658 } eth_rcv_bufs[PKTBUFSRX];
659
660 static unsigned int eth_rcv_current, eth_rcv_last;
661 #endif
662
663 static struct eth_device *eth_devices;
664 struct eth_device *eth_current;
665
666 static void eth_set_current_to_next(void)
667 {
668 eth_current = eth_current->next;
669 }
670
671 static void eth_set_dev(struct eth_device *dev)
672 {
673 eth_current = dev;
674 }
675
676 struct eth_device *eth_get_dev_by_name(const char *devname)
677 {
678 struct eth_device *dev, *target_dev;
679
680 BUG_ON(devname == NULL);
681
682 if (!eth_devices)
683 return NULL;
684
685 dev = eth_devices;
686 target_dev = NULL;
687 do {
688 if (strcmp(devname, dev->name) == 0) {
689 target_dev = dev;
690 break;
691 }
692 dev = dev->next;
693 } while (dev != eth_devices);
694
695 return target_dev;
696 }
697
698 struct eth_device *eth_get_dev_by_index(int index)
699 {
700 struct eth_device *dev, *target_dev;
701
702 if (!eth_devices)
703 return NULL;
704
705 dev = eth_devices;
706 target_dev = NULL;
707 do {
708 if (dev->index == index) {
709 target_dev = dev;
710 break;
711 }
712 dev = dev->next;
713 } while (dev != eth_devices);
714
715 return target_dev;
716 }
717
718 int eth_get_dev_index(void)
719 {
720 if (!eth_current)
721 return -1;
722
723 return eth_current->index;
724 }
725
726 static int on_ethaddr(const char *name, const char *value, enum env_op op,
727 int flags)
728 {
729 int index;
730 struct eth_device *dev;
731
732 if (!eth_devices)
733 return 0;
734
735 /* look for an index after "eth" */
736 index = simple_strtoul(name + 3, NULL, 10);
737
738 dev = eth_devices;
739 do {
740 if (dev->index == index) {
741 switch (op) {
742 case env_op_create:
743 case env_op_overwrite:
744 eth_parse_enetaddr(value, dev->enetaddr);
745 break;
746 case env_op_delete:
747 memset(dev->enetaddr, 0, 6);
748 }
749 }
750 dev = dev->next;
751 } while (dev != eth_devices);
752
753 return 0;
754 }
755 U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
756
757 int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
758 int eth_number)
759 {
760 unsigned char env_enetaddr[6];
761 int ret = 0;
762
763 eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
764
765 if (!is_zero_ethaddr(env_enetaddr)) {
766 if (!is_zero_ethaddr(dev->enetaddr) &&
767 memcmp(dev->enetaddr, env_enetaddr, 6)) {
768 printf("\nWarning: %s MAC addresses don't match:\n",
769 dev->name);
770 printf("Address in SROM is %pM\n",
771 dev->enetaddr);
772 printf("Address in environment is %pM\n",
773 env_enetaddr);
774 }
775
776 memcpy(dev->enetaddr, env_enetaddr, 6);
777 } else if (is_valid_ethaddr(dev->enetaddr)) {
778 eth_setenv_enetaddr_by_index(base_name, eth_number,
779 dev->enetaddr);
780 printf("\nWarning: %s using MAC address from net device\n",
781 dev->name);
782 } else if (is_zero_ethaddr(dev->enetaddr)) {
783 #ifdef CONFIG_NET_RANDOM_ETHADDR
784 net_random_ethaddr(dev->enetaddr);
785 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
786 dev->name, eth_number, dev->enetaddr);
787 #else
788 printf("\nError: %s address not set.\n",
789 dev->name);
790 return -EINVAL;
791 #endif
792 }
793
794 if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
795 if (!is_valid_ethaddr(dev->enetaddr)) {
796 printf("\nError: %s address %pM illegal value\n",
797 dev->name, dev->enetaddr);
798 return -EINVAL;
799 }
800
801 ret = dev->write_hwaddr(dev);
802 if (ret)
803 printf("\nWarning: %s failed to set MAC address\n",
804 dev->name);
805 }
806
807 return ret;
808 }
809
810 int eth_register(struct eth_device *dev)
811 {
812 struct eth_device *d;
813 static int index;
814
815 assert(strlen(dev->name) < sizeof(dev->name));
816
817 if (!eth_devices) {
818 eth_devices = dev;
819 eth_current = dev;
820 eth_current_changed();
821 } else {
822 for (d = eth_devices; d->next != eth_devices; d = d->next)
823 ;
824 d->next = dev;
825 }
826
827 dev->state = ETH_STATE_INIT;
828 dev->next = eth_devices;
829 dev->index = index++;
830
831 return 0;
832 }
833
834 int eth_unregister(struct eth_device *dev)
835 {
836 struct eth_device *cur;
837
838 /* No device */
839 if (!eth_devices)
840 return -ENODEV;
841
842 for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
843 cur = cur->next)
844 ;
845
846 /* Device not found */
847 if (cur->next != dev)
848 return -ENODEV;
849
850 cur->next = dev->next;
851
852 if (eth_devices == dev)
853 eth_devices = dev->next == eth_devices ? NULL : dev->next;
854
855 if (eth_current == dev) {
856 eth_current = eth_devices;
857 eth_current_changed();
858 }
859
860 return 0;
861 }
862
863 int eth_initialize(void)
864 {
865 int num_devices = 0;
866
867 eth_devices = NULL;
868 eth_current = NULL;
869 eth_common_init();
870
871 if (!eth_devices) {
872 puts("No ethernet found.\n");
873 bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
874 } else {
875 struct eth_device *dev = eth_devices;
876 char *ethprime = getenv("ethprime");
877
878 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
879 do {
880 if (dev->index)
881 puts(", ");
882
883 printf("%s", dev->name);
884
885 if (ethprime && strcmp(dev->name, ethprime) == 0) {
886 eth_current = dev;
887 puts(" [PRIME]");
888 }
889
890 if (strchr(dev->name, ' '))
891 puts("\nWarning: eth device name has a space!"
892 "\n");
893
894 eth_write_hwaddr(dev, "eth", dev->index);
895
896 dev = dev->next;
897 num_devices++;
898 } while (dev != eth_devices);
899
900 eth_current_changed();
901 putc('\n');
902 }
903
904 return num_devices;
905 }
906
907 #ifdef CONFIG_MCAST_TFTP
908 /* Multicast.
909 * mcast_addr: multicast ipaddr from which multicast Mac is made
910 * join: 1=join, 0=leave.
911 */
912 int eth_mcast_join(struct in_addr mcast_ip, int join)
913 {
914 u8 mcast_mac[6];
915 if (!eth_current || !eth_current->mcast)
916 return -1;
917 mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
918 mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
919 mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f;
920 mcast_mac[2] = 0x5e;
921 mcast_mac[1] = 0x0;
922 mcast_mac[0] = 0x1;
923 return eth_current->mcast(eth_current, mcast_mac, join);
924 }
925
926 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
927 * and this is the ethernet-crc method needed for TSEC -- and perhaps
928 * some other adapter -- hash tables
929 */
930 #define CRCPOLY_LE 0xedb88320
931 u32 ether_crc(size_t len, unsigned char const *p)
932 {
933 int i;
934 u32 crc;
935 crc = ~0;
936 while (len--) {
937 crc ^= *p++;
938 for (i = 0; i < 8; i++)
939 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
940 }
941 /* an reverse the bits, cuz of way they arrive -- last-first */
942 crc = (crc >> 16) | (crc << 16);
943 crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
944 crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
945 crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
946 crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
947 return crc;
948 }
949
950 #endif
951
952
953 int eth_init(void)
954 {
955 struct eth_device *old_current;
956
957 if (!eth_current) {
958 puts("No ethernet found.\n");
959 return -ENODEV;
960 }
961
962 old_current = eth_current;
963 do {
964 debug("Trying %s\n", eth_current->name);
965
966 if (eth_current->init(eth_current, gd->bd) >= 0) {
967 eth_current->state = ETH_STATE_ACTIVE;
968
969 return 0;
970 }
971 debug("FAIL\n");
972
973 eth_try_another(0);
974 } while (old_current != eth_current);
975
976 return -ETIMEDOUT;
977 }
978
979 void eth_halt(void)
980 {
981 if (!eth_current)
982 return;
983
984 eth_current->halt(eth_current);
985
986 eth_current->state = ETH_STATE_PASSIVE;
987 }
988
989 int eth_is_active(struct eth_device *dev)
990 {
991 return dev && dev->state == ETH_STATE_ACTIVE;
992 }
993
994 int eth_send(void *packet, int length)
995 {
996 if (!eth_current)
997 return -ENODEV;
998
999 return eth_current->send(eth_current, packet, length);
1000 }
1001
1002 int eth_rx(void)
1003 {
1004 if (!eth_current)
1005 return -ENODEV;
1006
1007 return eth_current->recv(eth_current);
1008 }
1009 #endif /* ifndef CONFIG_DM_ETH */
1010
1011 #ifdef CONFIG_API
1012 static void eth_save_packet(void *packet, int length)
1013 {
1014 char *p = packet;
1015 int i;
1016
1017 if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
1018 return;
1019
1020 if (PKTSIZE < length)
1021 return;
1022
1023 for (i = 0; i < length; i++)
1024 eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
1025
1026 eth_rcv_bufs[eth_rcv_last].length = length;
1027 eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
1028 }
1029
1030 int eth_receive(void *packet, int length)
1031 {
1032 char *p = packet;
1033 void *pp = push_packet;
1034 int i;
1035
1036 if (eth_rcv_current == eth_rcv_last) {
1037 push_packet = eth_save_packet;
1038 eth_rx();
1039 push_packet = pp;
1040
1041 if (eth_rcv_current == eth_rcv_last)
1042 return -1;
1043 }
1044
1045 length = min(eth_rcv_bufs[eth_rcv_current].length, length);
1046
1047 for (i = 0; i < length; i++)
1048 p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
1049
1050 eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
1051 return length;
1052 }
1053 #endif /* CONFIG_API */
1054
1055 static void eth_current_changed(void)
1056 {
1057 char *act = getenv("ethact");
1058 char *ethrotate;
1059
1060 /*
1061 * The call to eth_get_dev() below has a side effect of rotating
1062 * ethernet device if uc_priv->current == NULL. This is not what
1063 * we want when 'ethrotate' variable is 'no'.
1064 */
1065 ethrotate = getenv("ethrotate");
1066 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
1067 return;
1068
1069 /* update current ethernet name */
1070 if (eth_get_dev()) {
1071 if (act == NULL || strcmp(act, eth_get_name()) != 0)
1072 setenv("ethact", eth_get_name());
1073 }
1074 /*
1075 * remove the variable completely if there is no active
1076 * interface
1077 */
1078 else if (act != NULL)
1079 setenv("ethact", NULL);
1080 }
1081
1082 void eth_try_another(int first_restart)
1083 {
1084 static void *first_failed;
1085 char *ethrotate;
1086
1087 /*
1088 * Do not rotate between network interfaces when
1089 * 'ethrotate' variable is set to 'no'.
1090 */
1091 ethrotate = getenv("ethrotate");
1092 if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
1093 return;
1094
1095 if (!eth_get_dev())
1096 return;
1097
1098 if (first_restart)
1099 first_failed = eth_get_dev();
1100
1101 eth_set_current_to_next();
1102
1103 eth_current_changed();
1104
1105 if (first_failed == eth_get_dev())
1106 net_restart_wrap = 1;
1107 }
1108
1109 void eth_set_current(void)
1110 {
1111 static char *act;
1112 static int env_changed_id;
1113 int env_id;
1114
1115 env_id = get_env_id();
1116 if ((act == NULL) || (env_changed_id != env_id)) {
1117 act = getenv("ethact");
1118 env_changed_id = env_id;
1119 }
1120
1121 if (act == NULL) {
1122 char *ethprime = getenv("ethprime");
1123 void *dev = NULL;
1124
1125 if (ethprime)
1126 dev = eth_get_dev_by_name(ethprime);
1127 if (dev)
1128 eth_set_dev(dev);
1129 else
1130 eth_set_dev(NULL);
1131 } else {
1132 eth_set_dev(eth_get_dev_by_name(act));
1133 }
1134
1135 eth_current_changed();
1136 }
1137
1138 const char *eth_get_name(void)
1139 {
1140 return eth_get_dev() ? eth_get_dev()->name : "unknown";
1141 }