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24#include <common.h>
25#include <command.h>
26#include <dm.h>
27#include <env.h>
28#include <errno.h>
29#include <memalign.h>
30#include <asm/processor.h>
31#include <asm/unaligned.h>
32#include <linux/ctype.h>
33#include <linux/list.h>
34#include <asm/byteorder.h>
35#ifdef CONFIG_SANDBOX
36#include <asm/state.h>
37#endif
38#include <asm/unaligned.h>
39
40#include <usb.h>
41
42#define USB_BUFSIZ 512
43
44#define HUB_SHORT_RESET_TIME 20
45#define HUB_LONG_RESET_TIME 200
46
47#define PORT_OVERCURRENT_MAX_SCAN_COUNT 3
48
49struct usb_device_scan {
50 struct usb_device *dev;
51 struct usb_hub_device *hub;
52 int port;
53 struct list_head list;
54};
55
56static LIST_HEAD(usb_scan_list);
57
58__weak void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
59{
60 return;
61}
62
63static inline bool usb_hub_is_superspeed(struct usb_device *hdev)
64{
65 return hdev->descriptor.bDeviceProtocol == 3;
66}
67
68#if CONFIG_IS_ENABLED(DM_USB)
69bool usb_hub_is_root_hub(struct udevice *hub)
70{
71 if (device_get_uclass_id(hub->parent) != UCLASS_USB_HUB)
72 return true;
73
74 return false;
75}
76
77static int usb_set_hub_depth(struct usb_device *dev, int depth)
78{
79 if (depth < 0 || depth > 4)
80 return -EINVAL;
81
82 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
83 USB_REQ_SET_HUB_DEPTH, USB_DIR_OUT | USB_RT_HUB,
84 depth, 0, NULL, 0, USB_CNTL_TIMEOUT);
85}
86#endif
87
88static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
89{
90 unsigned short dtype = USB_DT_HUB;
91
92 if (usb_hub_is_superspeed(dev))
93 dtype = USB_DT_SS_HUB;
94
95 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
96 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
97 dtype << 8, 0, data, size, USB_CNTL_TIMEOUT);
98}
99
100static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
101{
102 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
103 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
104 port, NULL, 0, USB_CNTL_TIMEOUT);
105}
106
107static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
108{
109 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
110 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
111 port, NULL, 0, USB_CNTL_TIMEOUT);
112}
113
114static int usb_get_hub_status(struct usb_device *dev, void *data)
115{
116 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
117 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
118 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
119}
120
121int usb_get_port_status(struct usb_device *dev, int port, void *data)
122{
123 int ret;
124
125 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
126 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
127 data, sizeof(struct usb_port_status), USB_CNTL_TIMEOUT);
128
129#if CONFIG_IS_ENABLED(DM_USB)
130 if (ret < 0)
131 return ret;
132
133
134
135
136
137
138
139
140
141
142 if (!usb_hub_is_root_hub(dev->dev) && usb_hub_is_superspeed(dev)) {
143 struct usb_port_status *status = (struct usb_port_status *)data;
144 u16 tmp = (status->wPortStatus) & USB_SS_PORT_STAT_MASK;
145
146 if (status->wPortStatus & USB_SS_PORT_STAT_POWER)
147 tmp |= USB_PORT_STAT_POWER;
148 if ((status->wPortStatus & USB_SS_PORT_STAT_SPEED) ==
149 USB_SS_PORT_STAT_SPEED_5GBPS)
150 tmp |= USB_PORT_STAT_SUPER_SPEED;
151
152 status->wPortStatus = tmp;
153 }
154#endif
155
156 return ret;
157}
158
159
160static void usb_hub_power_on(struct usb_hub_device *hub)
161{
162 int i;
163 struct usb_device *dev;
164 unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
165 const char *env;
166
167 dev = hub->pusb_dev;
168
169 debug("enabling power on all ports\n");
170 for (i = 0; i < dev->maxchild; i++) {
171 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
172 debug("port %d returns %lX\n", i + 1, dev->status);
173 }
174
175#ifdef CONFIG_SANDBOX
176
177
178
179
180 if (state_get_skip_delays())
181 return;
182#endif
183
184
185
186
187
188
189
190 env = env_get("usb_pgood_delay");
191 if (env)
192 pgood_delay = max(pgood_delay,
193 (unsigned)simple_strtol(env, NULL, 0));
194 debug("pgood_delay=%dms\n", pgood_delay);
195
196
197
198
199
200 hub->query_delay = get_timer(0) + max(100, (int)pgood_delay);
201
202
203
204
205
206
207 hub->connect_timeout = hub->query_delay + 1000;
208 debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n",
209 dev->devnum, max(100, (int)pgood_delay),
210 max(100, (int)pgood_delay) + 1000);
211}
212
213#if !CONFIG_IS_ENABLED(DM_USB)
214static struct usb_hub_device hub_dev[USB_MAX_HUB];
215static int usb_hub_index;
216
217void usb_hub_reset(void)
218{
219 usb_hub_index = 0;
220
221
222 memset(hub_dev, 0, sizeof(hub_dev));
223}
224
225static struct usb_hub_device *usb_hub_allocate(void)
226{
227 if (usb_hub_index < USB_MAX_HUB)
228 return &hub_dev[usb_hub_index++];
229
230 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
231 return NULL;
232}
233#endif
234
235#define MAX_TRIES 5
236
237static inline const char *portspeed(int portstatus)
238{
239 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
240 case USB_PORT_STAT_SUPER_SPEED:
241 return "5 Gb/s";
242 case USB_PORT_STAT_HIGH_SPEED:
243 return "480 Mb/s";
244 case USB_PORT_STAT_LOW_SPEED:
245 return "1.5 Mb/s";
246 default:
247 return "12 Mb/s";
248 }
249}
250
251
252
253
254
255
256
257
258
259
260
261static int usb_hub_port_reset(struct usb_device *dev, int port,
262 unsigned short *portstat)
263{
264 int err, tries;
265 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
266 unsigned short portstatus, portchange;
267 int delay = HUB_SHORT_RESET_TIME;
268
269#if CONFIG_IS_ENABLED(DM_USB)
270 debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name,
271 port + 1);
272#else
273 debug("%s: resetting port %d...\n", __func__, port + 1);
274#endif
275 for (tries = 0; tries < MAX_TRIES; tries++) {
276 err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
277 if (err < 0)
278 return err;
279
280 mdelay(delay);
281
282 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
283 debug("get_port_status failed status %lX\n",
284 dev->status);
285 return -1;
286 }
287 portstatus = le16_to_cpu(portsts->wPortStatus);
288 portchange = le16_to_cpu(portsts->wPortChange);
289
290 debug("portstatus %x, change %x, %s\n", portstatus, portchange,
291 portspeed(portstatus));
292
293 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
294 " USB_PORT_STAT_ENABLE %d\n",
295 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
296 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
297 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316 if (portstatus & USB_PORT_STAT_ENABLE)
317 break;
318
319
320 delay = HUB_LONG_RESET_TIME;
321 }
322
323 if (tries == MAX_TRIES) {
324 debug("Cannot enable port %i after %i retries, " \
325 "disabling port.\n", port + 1, MAX_TRIES);
326 debug("Maybe the USB cable is bad?\n");
327 return -1;
328 }
329
330 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
331 *portstat = portstatus;
332 return 0;
333}
334
335int usb_hub_port_connect_change(struct usb_device *dev, int port)
336{
337 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
338 unsigned short portstatus;
339 int ret, speed;
340
341
342 ret = usb_get_port_status(dev, port + 1, portsts);
343 if (ret < 0) {
344 debug("get_port_status failed\n");
345 return ret;
346 }
347
348 portstatus = le16_to_cpu(portsts->wPortStatus);
349 debug("portstatus %x, change %x, %s\n",
350 portstatus,
351 le16_to_cpu(portsts->wPortChange),
352 portspeed(portstatus));
353
354
355 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
356
357
358 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
359 (!(portstatus & USB_PORT_STAT_ENABLE))) ||
360 usb_device_has_child_on_port(dev, port)) {
361 debug("usb_disconnect(&hub->children[port]);\n");
362
363 if (!(portstatus & USB_PORT_STAT_CONNECTION))
364 return -ENOTCONN;
365 }
366
367
368 ret = usb_hub_port_reset(dev, port, &portstatus);
369 if (ret < 0) {
370 if (ret != -ENXIO)
371 printf("cannot reset port %i!?\n", port + 1);
372 return ret;
373 }
374
375 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
376 case USB_PORT_STAT_SUPER_SPEED:
377 speed = USB_SPEED_SUPER;
378 break;
379 case USB_PORT_STAT_HIGH_SPEED:
380 speed = USB_SPEED_HIGH;
381 break;
382 case USB_PORT_STAT_LOW_SPEED:
383 speed = USB_SPEED_LOW;
384 break;
385 default:
386 speed = USB_SPEED_FULL;
387 break;
388 }
389
390#if CONFIG_IS_ENABLED(DM_USB)
391 struct udevice *child;
392
393 ret = usb_scan_device(dev->dev, port + 1, speed, &child);
394#else
395 struct usb_device *usb;
396
397 ret = usb_alloc_new_device(dev->controller, &usb);
398 if (ret) {
399 printf("cannot create new device: ret=%d", ret);
400 return ret;
401 }
402
403 dev->children[port] = usb;
404 usb->speed = speed;
405 usb->parent = dev;
406 usb->portnr = port + 1;
407
408 ret = usb_new_device(usb);
409 if (ret < 0) {
410
411 usb_free_device(dev->controller);
412 dev->children[port] = NULL;
413 }
414#endif
415 if (ret < 0) {
416 debug("hub: disabling port %d\n", port + 1);
417 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
418 }
419
420 return ret;
421}
422
423static int usb_scan_port(struct usb_device_scan *usb_scan)
424{
425 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
426 unsigned short portstatus;
427 unsigned short portchange;
428 struct usb_device *dev;
429 struct usb_hub_device *hub;
430 int ret = 0;
431 int i;
432
433 dev = usb_scan->dev;
434 hub = usb_scan->hub;
435 i = usb_scan->port;
436
437
438
439
440
441 if (get_timer(0) < hub->query_delay)
442 return 0;
443
444 ret = usb_get_port_status(dev, i + 1, portsts);
445 if (ret < 0) {
446 debug("get_port_status failed\n");
447 if (get_timer(0) >= hub->connect_timeout) {
448 debug("devnum=%d port=%d: timeout\n",
449 dev->devnum, i + 1);
450
451 list_del(&usb_scan->list);
452 free(usb_scan);
453 return 0;
454 }
455 return 0;
456 }
457
458 portstatus = le16_to_cpu(portsts->wPortStatus);
459 portchange = le16_to_cpu(portsts->wPortChange);
460 debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange);
461
462
463
464
465
466
467
468
469 if (!(portchange & USB_PORT_STAT_C_CONNECTION) &&
470 !(portstatus & USB_PORT_STAT_CONNECTION)) {
471 if (get_timer(0) >= hub->connect_timeout) {
472 debug("devnum=%d port=%d: timeout\n",
473 dev->devnum, i + 1);
474
475 list_del(&usb_scan->list);
476 free(usb_scan);
477 return 0;
478 }
479 return 0;
480 }
481
482 if (portchange & USB_PORT_STAT_C_RESET) {
483 debug("port %d reset change\n", i + 1);
484 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
485 }
486
487 if ((portchange & USB_SS_PORT_STAT_C_BH_RESET) &&
488 usb_hub_is_superspeed(dev)) {
489 debug("port %d BH reset change\n", i + 1);
490 usb_clear_port_feature(dev, i + 1, USB_SS_PORT_FEAT_C_BH_RESET);
491 }
492
493
494 debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1);
495
496 usb_hub_port_connect_change(dev, i);
497
498 if (portchange & USB_PORT_STAT_C_ENABLE) {
499 debug("port %d enable change, status %x\n", i + 1, portstatus);
500 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
501
502
503
504
505#ifndef CONFIG_USB_EHCI_FARADAY
506
507
508
509
510
511 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
512 (portstatus & USB_PORT_STAT_CONNECTION) &&
513 usb_device_has_child_on_port(dev, i)) {
514 debug("already running port %i disabled by hub (EMI?), re-enabling...\n",
515 i + 1);
516 usb_hub_port_connect_change(dev, i);
517 }
518#endif
519 }
520
521 if (portstatus & USB_PORT_STAT_SUSPEND) {
522 debug("port %d suspend change\n", i + 1);
523 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND);
524 }
525
526 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
527 debug("port %d over-current change\n", i + 1);
528 usb_clear_port_feature(dev, i + 1,
529 USB_PORT_FEAT_C_OVER_CURRENT);
530
531 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
532 hub->overcurrent_count[i]++;
533
534
535
536
537
538 if (hub->overcurrent_count[i] <=
539 PORT_OVERCURRENT_MAX_SCAN_COUNT)
540 return 0;
541
542
543 printf("Port %d over-current occurred %d times\n", i + 1,
544 hub->overcurrent_count[i]);
545 }
546
547
548
549
550
551 list_del(&usb_scan->list);
552 free(usb_scan);
553
554 return 0;
555}
556
557static int usb_device_list_scan(void)
558{
559 struct usb_device_scan *usb_scan;
560 struct usb_device_scan *tmp;
561 static int running;
562 int ret = 0;
563
564
565 if (running)
566 return 0;
567
568 running = 1;
569
570 while (1) {
571
572 if (list_empty(&usb_scan_list))
573 goto out;
574
575 list_for_each_entry_safe(usb_scan, tmp, &usb_scan_list, list) {
576 int ret;
577
578
579 ret = usb_scan_port(usb_scan);
580 if (ret)
581 goto out;
582 }
583 }
584
585out:
586
587
588
589
590
591 running = 0;
592
593 return ret;
594}
595
596static struct usb_hub_device *usb_get_hub_device(struct usb_device *dev)
597{
598 struct usb_hub_device *hub;
599
600#if !CONFIG_IS_ENABLED(DM_USB)
601
602 hub = usb_hub_allocate();
603#else
604 hub = dev_get_uclass_priv(dev->dev);
605#endif
606
607 return hub;
608}
609
610static int usb_hub_configure(struct usb_device *dev)
611{
612 int i, length;
613 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
614 unsigned char *bitmap;
615 short hubCharacteristics;
616 struct usb_hub_descriptor *descriptor;
617 struct usb_hub_device *hub;
618 struct usb_hub_status *hubsts;
619 int ret;
620
621 hub = usb_get_hub_device(dev);
622 if (hub == NULL)
623 return -ENOMEM;
624 hub->pusb_dev = dev;
625
626
627 ret = usb_get_hub_descriptor(dev, buffer, 4);
628 if (ret < 0) {
629 debug("usb_hub_configure: failed to get hub " \
630 "descriptor, giving up %lX\n", dev->status);
631 return ret;
632 }
633 descriptor = (struct usb_hub_descriptor *)buffer;
634
635 length = min_t(int, descriptor->bLength,
636 sizeof(struct usb_hub_descriptor));
637
638 ret = usb_get_hub_descriptor(dev, buffer, length);
639 if (ret < 0) {
640 debug("usb_hub_configure: failed to get hub " \
641 "descriptor 2nd giving up %lX\n", dev->status);
642 return ret;
643 }
644 memcpy((unsigned char *)&hub->desc, buffer, length);
645
646 put_unaligned(le16_to_cpu(get_unaligned(
647 &descriptor->wHubCharacteristics)),
648 &hub->desc.wHubCharacteristics);
649
650 bitmap = (unsigned char *)&hub->desc.u.hs.DeviceRemovable[0];
651
652 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
653 bitmap = (unsigned char *)&hub->desc.u.hs.PortPowerCtrlMask[0];
654 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
655
656 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
657 hub->desc.u.hs.DeviceRemovable[i] =
658 descriptor->u.hs.DeviceRemovable[i];
659
660 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
661 hub->desc.u.hs.PortPowerCtrlMask[i] =
662 descriptor->u.hs.PortPowerCtrlMask[i];
663
664 dev->maxchild = descriptor->bNbrPorts;
665 debug("%d ports detected\n", dev->maxchild);
666
667 hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
668 switch (hubCharacteristics & HUB_CHAR_LPSM) {
669 case 0x00:
670 debug("ganged power switching\n");
671 break;
672 case 0x01:
673 debug("individual port power switching\n");
674 break;
675 case 0x02:
676 case 0x03:
677 debug("unknown reserved power switching mode\n");
678 break;
679 }
680
681 if (hubCharacteristics & HUB_CHAR_COMPOUND)
682 debug("part of a compound device\n");
683 else
684 debug("standalone hub\n");
685
686 switch (hubCharacteristics & HUB_CHAR_OCPM) {
687 case 0x00:
688 debug("global over-current protection\n");
689 break;
690 case 0x08:
691 debug("individual port over-current protection\n");
692 break;
693 case 0x10:
694 case 0x18:
695 debug("no over-current protection\n");
696 break;
697 }
698
699 switch (dev->descriptor.bDeviceProtocol) {
700 case USB_HUB_PR_FS:
701 break;
702 case USB_HUB_PR_HS_SINGLE_TT:
703 debug("Single TT\n");
704 break;
705 case USB_HUB_PR_HS_MULTI_TT:
706 ret = usb_set_interface(dev, 0, 1);
707 if (ret == 0) {
708 debug("TT per port\n");
709 hub->tt.multi = true;
710 } else {
711 debug("Using single TT (err %d)\n", ret);
712 }
713 break;
714 case USB_HUB_PR_SS:
715
716 break;
717 default:
718 debug("Unrecognized hub protocol %d\n",
719 dev->descriptor.bDeviceProtocol);
720 break;
721 }
722
723
724 switch (hubCharacteristics & HUB_CHAR_TTTT) {
725 case HUB_TTTT_8_BITS:
726 if (dev->descriptor.bDeviceProtocol != 0) {
727 hub->tt.think_time = 666;
728 debug("TT requires at most %d FS bit times (%d ns)\n",
729 8, hub->tt.think_time);
730 }
731 break;
732 case HUB_TTTT_16_BITS:
733 hub->tt.think_time = 666 * 2;
734 debug("TT requires at most %d FS bit times (%d ns)\n",
735 16, hub->tt.think_time);
736 break;
737 case HUB_TTTT_24_BITS:
738 hub->tt.think_time = 666 * 3;
739 debug("TT requires at most %d FS bit times (%d ns)\n",
740 24, hub->tt.think_time);
741 break;
742 case HUB_TTTT_32_BITS:
743 hub->tt.think_time = 666 * 4;
744 debug("TT requires at most %d FS bit times (%d ns)\n",
745 32, hub->tt.think_time);
746 break;
747 }
748
749 debug("power on to power good time: %dms\n",
750 descriptor->bPwrOn2PwrGood * 2);
751 debug("hub controller current requirement: %dmA\n",
752 descriptor->bHubContrCurrent);
753
754 for (i = 0; i < dev->maxchild; i++)
755 debug("port %d is%s removable\n", i + 1,
756 hub->desc.u.hs.DeviceRemovable[(i + 1) / 8] & \
757 (1 << ((i + 1) % 8)) ? " not" : "");
758
759 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
760 debug("usb_hub_configure: failed to get Status - " \
761 "too long: %d\n", descriptor->bLength);
762 return -EFBIG;
763 }
764
765 ret = usb_get_hub_status(dev, buffer);
766 if (ret < 0) {
767 debug("usb_hub_configure: failed to get Status %lX\n",
768 dev->status);
769 return ret;
770 }
771
772 hubsts = (struct usb_hub_status *)buffer;
773
774 debug("get_hub_status returned status %X, change %X\n",
775 le16_to_cpu(hubsts->wHubStatus),
776 le16_to_cpu(hubsts->wHubChange));
777 debug("local power source is %s\n",
778 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
779 "lost (inactive)" : "good");
780 debug("%sover-current condition exists\n",
781 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
782 "" : "no ");
783
784#if CONFIG_IS_ENABLED(DM_USB)
785
786
787
788
789 ret = usb_update_hub_device(dev);
790 if (ret < 0 && ret != -ENOSYS) {
791 debug("%s: failed to update hub device for HCD (%x)\n",
792 __func__, ret);
793 return ret;
794 }
795
796
797
798
799
800
801
802
803
804
805 if (usb_hub_is_root_hub(dev->dev)) {
806 hub->hub_depth = -1;
807 } else {
808 struct udevice *hdev;
809 int depth = 0;
810
811 hdev = dev->dev->parent;
812 while (!usb_hub_is_root_hub(hdev)) {
813 depth++;
814 hdev = hdev->parent;
815 }
816
817 hub->hub_depth = depth;
818
819 if (usb_hub_is_superspeed(dev)) {
820 debug("set hub (%p) depth to %d\n", dev, depth);
821
822
823
824
825
826 ret = usb_set_hub_depth(dev, depth);
827 if (ret < 0) {
828 debug("%s: failed to set hub depth (%lX)\n",
829 __func__, dev->status);
830 return ret;
831 }
832 }
833 }
834#endif
835
836 usb_hub_power_on(hub);
837
838
839
840
841
842
843 for (i = 0; i < dev->maxchild; i++)
844 usb_hub_reset_devices(hub, i + 1);
845
846
847
848
849
850
851
852
853 for (i = 0; i < dev->maxchild; i++) {
854 struct usb_device_scan *usb_scan;
855
856 usb_scan = calloc(1, sizeof(*usb_scan));
857 if (!usb_scan) {
858 printf("Can't allocate memory for USB device!\n");
859 return -ENOMEM;
860 }
861 usb_scan->dev = dev;
862 usb_scan->hub = hub;
863 usb_scan->port = i;
864 list_add_tail(&usb_scan->list, &usb_scan_list);
865 }
866
867
868
869
870 ret = usb_device_list_scan();
871
872 return ret;
873}
874
875static int usb_hub_check(struct usb_device *dev, int ifnum)
876{
877 struct usb_interface *iface;
878 struct usb_endpoint_descriptor *ep = NULL;
879
880 iface = &dev->config.if_desc[ifnum];
881
882 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
883 goto err;
884
885
886 if ((iface->desc.bInterfaceSubClass != 0) &&
887 (iface->desc.bInterfaceSubClass != 1))
888 goto err;
889
890 if (iface->desc.bNumEndpoints != 1)
891 goto err;
892 ep = &iface->ep_desc[0];
893
894 if (!(ep->bEndpointAddress & USB_DIR_IN))
895 goto err;
896
897 if ((ep->bmAttributes & 3) != 3)
898 goto err;
899
900 debug("USB hub found\n");
901 return 0;
902
903err:
904 debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n",
905 iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass,
906 iface->desc.bNumEndpoints);
907 if (ep) {
908 debug(" bEndpointAddress=%#x, bmAttributes=%d",
909 ep->bEndpointAddress, ep->bmAttributes);
910 }
911
912 return -ENOENT;
913}
914
915int usb_hub_probe(struct usb_device *dev, int ifnum)
916{
917 int ret;
918
919 ret = usb_hub_check(dev, ifnum);
920 if (ret)
921 return 0;
922 ret = usb_hub_configure(dev);
923 return ret;
924}
925
926#if CONFIG_IS_ENABLED(DM_USB)
927int usb_hub_scan(struct udevice *hub)
928{
929 struct usb_device *udev = dev_get_parent_priv(hub);
930
931 return usb_hub_configure(udev);
932}
933
934static int usb_hub_post_probe(struct udevice *dev)
935{
936 debug("%s\n", __func__);
937 return usb_hub_scan(dev);
938}
939
940static const struct udevice_id usb_hub_ids[] = {
941 { .compatible = "usb-hub" },
942 { }
943};
944
945U_BOOT_DRIVER(usb_generic_hub) = {
946 .name = "usb_hub",
947 .id = UCLASS_USB_HUB,
948 .of_match = usb_hub_ids,
949 .flags = DM_FLAG_ALLOC_PRIV_DMA,
950};
951
952UCLASS_DRIVER(usb_hub) = {
953 .id = UCLASS_USB_HUB,
954 .name = "usb_hub",
955 .post_bind = dm_scan_fdt_dev,
956 .post_probe = usb_hub_post_probe,
957 .child_pre_probe = usb_child_pre_probe,
958 .per_child_auto_alloc_size = sizeof(struct usb_device),
959 .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
960 .per_device_auto_alloc_size = sizeof(struct usb_hub_device),
961};
962
963static const struct usb_device_id hub_id_table[] = {
964 {
965 .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS,
966 .bDeviceClass = USB_CLASS_HUB
967 },
968 { }
969};
970
971U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table);
972
973#endif
974