busses/usb/ohci.cpp

1025 	// the current tail will become the first descriptor
1081 	// the current tail will become the first descriptor
1221 				// are canceled by setting the head pointer to the tail pointer
1666 	// fill in the information of the first descriptor into the current tail
1667 	ohci_general_td *tail = (ohci_general_td *)endpoint->tail_logical_descriptor;
1668 	tail->flags = first->flags;
1669 	tail->buffer_physical = first->buffer_physical;
1670 	tail->next_physical_descriptor = first->next_physical_descriptor;
1671 	tail->last_physical_byte_address = first->last_physical_byte_address;
1672 	tail->buffer_size = first->buffer_size;
1673 	tail->buffer_logical = first->buffer_logical;
1674 	tail->next_logical_descriptor = first->next_logical_descriptor;
1676 	// the first descriptor becomes the new tail
1686 		_LinkDescriptors(tail, first);
1690 	// update the endpoint tail pointer to reflect the change
1693 	TRACE("switched tail from %p to %p\n", tail, first);
1697 	_PrintDescriptorChain(tail);
1706 	// fill in the information of the first descriptor into the current tail
1707 	ohci_isochronous_td *tail
1709 	tail->flags = first->flags;
1710 	tail->buffer_page_byte_0 = first->buffer_page_byte_0;
1711 	tail->next_physical_descriptor = first->next_physical_descriptor;
1712 	tail->last_byte_address = first->last_byte_address;
1713 	tail->buffer_size = first->buffer_size;
1714 	tail->buffer_logical = first->buffer_logical;
1715 	tail->next_logical_descriptor = first->next_logical_descriptor;
1716 	tail->next_done_descriptor = first->next_done_descriptor;
1718 	// the first descriptor becomes the new tail
1729 		tail->offset[i] = first->offset[i];
1734 		_LinkIsochronousDescriptors(tail, first, NULL);
1738 	// update the endpoint tail pointer to reflect the change
1741 	TRACE("switched tail from %p to %p\n", tail, first);
1745 	_PrintDescriptorChain(tail);
1769 			// then be restarted, or it will move the head to the tail when
1909 	// Create (necessary) tail descriptor
1913 		ohci_isochronous_td *tail = _CreateIsochronousDescriptor(0);
1914 		tail->flags = 0;
1915 		endpoint->tail_logical_descriptor = tail;
1916 		endpoint->head_physical_descriptor = tail->physical_address;
1917 		endpoint->tail_physical_descriptor = tail->physical_address;
1919 		ohci_general_td *tail = _CreateGeneralDescriptor(0);
1920 		tail->flags = 0;
1921 		endpoint->tail_logical_descriptor = tail;
1922 		endpoint->head_physical_descriptor = tail->physical_address;
1923 		endpoint->tail_physical_descriptor = tail->physical_address;