📄 usbdcore.lst
字号:
468 }
469
470 /*
471 * Return the first urb_link in a list with a distinguished
472 * head "hd", or NULL if the list is empty. This will also
473 * work as a predicate, returning NULL if empty, and non-NULL
474 * otherwise.
475 */
476 urb_link *first_urb_link (urb_link * hd)
477 {
478 urb_link *nx;
C51 COMPILER V8.09 USBDCORE 05/05/2008 19:48:28 PAGE 12
479 if (NULL != hd && NULL != (nx = hd->next) && nx != hd) {
480 /* There is at least one element in the list */
481 /* (besides the distinguished head). */
482 return (nx);
483 }
484 /* The list is empty */
485 return (NULL);
486 }
487
488 /*
489 * Return the first urb in a list with a distinguished
490 * head "hd", or NULL if the list is empty.
491 */
492 struct urb *first_urb (urb_link * hd)
493 {
494 urb_link *nx;
495 if (NULL == (nx = first_urb_link (hd))) {
496 /* The list is empty */
497 return (NULL);
498 }
499 return (p2surround (struct urb, link, nx));
500 }
501
502 /*
503 * Detach and return the first urb in a list with a distinguished
504 * head "hd", or NULL if the list is empty.
505 *
506 */
507 struct urb *first_urb_detached (urb_link * hd)
508 {
509 struct urb *urb;
510 if ((urb = first_urb (hd))) {
511 urb_detach (urb);
512 }
513 return urb;
514 }
515
516
517 /*
518 * Append an urb_link (or a whole list of
519 * urb_links) to the tail of another list
520 * of urb_links.
521 */
522 void urb_append (urb_link * hd, struct urb *urb)
523 {
524 if (hd && urb) {
525 urb_link *new = &urb->link;
526
527 /* This allows the new urb to be a list of urbs, */
528 /* with new pointing at the first, but the link */
529 /* must be initialized. */
530 /* Order is important here... */
531 urb_link *pul = hd->prev;
532 new->prev->next = hd;
533 hd->prev = new->prev;
534 new->prev = pul;
535 pul->next = new;
536 }
537 }
538
539 /* URB create/destroy functions ***************************************************** */
540
C51 COMPILER V8.09 USBDCORE 05/05/2008 19:48:28 PAGE 13
541 /**
542 * usbd_alloc_urb - allocate an URB appropriate for specified endpoint
543 * @device: device instance
544 * @endpoint: endpoint
545 *
546 * Allocate an urb structure. The usb device urb structure is used to
547 * contain all data associated with a transfer, including a setup packet for
548 * control transfers.
549 *
550 * NOTE: endpoint_address MUST contain a direction flag.
551 */
552 struct urb *usbd_alloc_urb (struct usb_device_instance *device, struct usb_endpoint_instance *endpoint)
553 {
554 struct urb *urb;
555
556 if( !(urb = (struct urb*)malloc(sizeof(struct urb))) ) {
557 usberr(" F A T A L: malloc(%u) FAILED!!!!", sizeof(struct urb));
558 return NULL;
559 }
560
561 /* Fill in known fields */
562 memset(urb, 0, sizeof(struct urb));
563 urb->endpoint = endpoint;
564 urb->device = device;
565 urb->buffer = (u8*)urb->buffer_data;
566 urb->buffer_length = sizeof(urb->buffer_data);
567
568 urb_link_init (&urb->link);
569
570 return urb;
571 }
572
573 /**
574 * usbd_dealloc_urb - deallocate an URB and associated buffer
575 * @urb: pointer to an urb structure
576 *
577 * Deallocate an urb structure and associated data.
578 */
579 void usbd_dealloc_urb (struct urb *urb)
580 {
581 if (urb) {
582 free (urb);
583 }
584 }
585
586 /* Event signaling functions ***************************************************** */
587
588 /**
589 * usbd_device_event - called to respond to various usb events
590 * @device: pointer to struct device
591 * @event: event to respond to
592 *
593 * Used by a Bus driver to indicate an event.
594 */
595 void usbd_device_event_irq (struct usb_device_instance *device, usb_device_event_t event, int data)
596 {
597 usb_device_state_t state;
598
599 if (!device || !device->bus) {
600 usberr("(%p,%d) NULL device or device->bus", device, event);
601 return;
602 }
C51 COMPILER V8.09 USBDCORE 05/05/2008 19:48:28 PAGE 14
603
604 state = device->device_state;
605
606 usbinfo("%s", usbd_device_events[event]);
607
608 switch (event) {
609 case DEVICE_UNKNOWN:
610 break;
611 case DEVICE_INIT:
612 device->device_state = STATE_INIT;
613 break;
614
615 case DEVICE_CREATE:
616 device->device_state = STATE_ATTACHED;
617 break;
618
619 case DEVICE_HUB_CONFIGURED:
620 device->device_state = STATE_POWERED;
621 break;
622
623 case DEVICE_RESET:
624 device->device_state = STATE_DEFAULT;
625 device->address = 0;
626 break;
627
628 case DEVICE_ADDRESS_ASSIGNED:
629 device->device_state = STATE_ADDRESSED;
630 break;
631
632 case DEVICE_CONFIGURED:
633 device->device_state = STATE_CONFIGURED;
634 break;
635
636 case DEVICE_DE_CONFIGURED:
637 device->device_state = STATE_ADDRESSED;
638 break;
639
640 case DEVICE_BUS_INACTIVE:
641 if (device->status != USBD_CLOSING) {
642 device->status = USBD_SUSPENDED;
643 }
644 break;
645 case DEVICE_BUS_ACTIVITY:
646 if (device->status != USBD_CLOSING) {
647 device->status = USBD_OK;
648 }
649 break;
650
651 case DEVICE_SET_INTERFACE:
652 break;
653 case DEVICE_SET_FEATURE:
654 break;
655 case DEVICE_CLEAR_FEATURE:
656 break;
657
658 case DEVICE_POWER_INTERRUPTION:
659 device->device_state = STATE_POWERED;
660 break;
661 case DEVICE_HUB_RESET:
662 device->device_state = STATE_ATTACHED;
663 break;
664 case DEVICE_DESTROY:
C51 COMPILER V8.09 USBDCORE 05/05/2008 19:48:28 PAGE 15
665 device->device_state = STATE_UNKNOWN;
666 break;
667
668 case DEVICE_FUNCTION_PRIVATE:
669 break;
670
671 default:
672 usbdbg("event %d - not handled",event);
673 break;
674 }
675 /*usbdbg("%s event: %d oldstate: %d newstate: %d status: %d address: %d",
676 device->name, event, state,
677 device->device_state, device->status, device->address); */
678
679 /* tell the bus interface driver */
680 if( device->event ) {
681 /* usbdbg("calling device->event"); */
682 device->event(device, event, data);
683 }
684 }
C51 COMPILATION COMPLETE. 12 WARNING(S), 175 ERROR(S)
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -