usb/host/ohci-q.c

20 		struct td	*td;
23 			td = urb_priv->td [i];
24 			if (td)
25 				td_free (hc, td);
414 		struct td	*td;
424 		/* dummy td; end of td list for ed */
425 		td = td_alloc (ohci, GFP_ATOMIC);
426 		if (!td) {
432 		ed->dummy = td;
433 		ed->hwTailP = cpu_to_hc32 (ohci, td->td_dma);
520 	struct td		*td, *td_pt;
542 	/* use this td as the next dummy */
543 	td_pt = urb_priv->td [index];
546 	td = urb_priv->td [index] = urb_priv->ed->dummy;
549 	td->ed = urb_priv->ed;
550 	td->next_dl_td = NULL;
551 	td->index = index;
552 	td->urb = urb;
553 	td->data_dma = data;
557 	td->hwINFO = cpu_to_hc32 (ohci, info);
559 		td->hwCBP = cpu_to_hc32 (ohci, data & 0xFFFFF000);
560 		*ohci_hwPSWp(ohci, td, 0) = cpu_to_hc16 (ohci,
563 		td->hwCBP = cpu_to_hc32 (ohci, data);
566 		td->hwBE = cpu_to_hc32 (ohci, data + len - 1);
568 		td->hwBE = 0;
569 	td->hwNextTD = cpu_to_hc32 (ohci, td_pt->td_dma);
572 	list_add_tail (&td->td_list, &td->ed->td_list);
575 	hash = TD_HASH_FUNC (td->td_dma);
576 	td->td_hash = ohci->td_hash [hash];
577 	ohci->td_hash [hash] = td;
581 	td->ed->hwTailP = td->hwNextTD;
756 static int td_done(struct ohci_hcd *ohci, struct urb *urb, struct td *td)
758 	u32	tdINFO = hc32_to_cpup (ohci, &td->hwINFO);
762 	list_del (&td->td_list);
766 		u16	tdPSW = ohci_hwPSW(ohci, td, 0);
778 			dlen = urb->iso_frame_desc [td->index].length;
786 		urb->iso_frame_desc [td->index].actual_length = dlen;
787 		urb->iso_frame_desc [td->index].status = cc_to_error [cc];
791 				"urb %p iso td %p (%d) len %d cc %d\n",
792 				urb, td, 1 + td->index, dlen, cc);
800 		u32	tdBE = hc32_to_cpup (ohci, &td->hwBE);
812 		if ((type != PIPE_CONTROL || td->index != 0) && tdBE != 0) {
813 			if (td->hwCBP == 0)
814 				urb->actual_length += tdBE - td->data_dma + 1;
817 					  hc32_to_cpup (ohci, &td->hwCBP)
818 					- td->data_dma;
823 				"urb %p td %p (%d) cc %d, len=%d/%d\n",
824 				urb, td, 1 + td->index, cc,
833 static void ed_halted(struct ohci_hcd *ohci, struct td *td, int cc)
835 	struct urb		*urb = td->urb;
837 	struct ed		*ed = td->ed;
838 	struct list_head	*tmp = td->td_list.next;
841 	/* clear ed halt; this is the td that caused it, but keep it inactive
853 		struct td	*next;
855 		next = list_entry (tmp, struct td, td_list);
861 		/* NOTE: if multi-td control DATA segments get supported,
862 		 * this urb had one of them, this td wasn't the last td
893 			hc32_to_cpu (ohci, td->hwINFO),
899 static void add_to_done_list(struct ohci_hcd *ohci, struct td *td)
901 	struct td	*td2, *td_prev;
904 	if (td->next_dl_td)
908 	ed = td->ed;
909 	td2 = td_prev = td;
923 	 * Make td->next_dl_td point to td itself, to mark the fact
924 	 * that td is on the done list.
926 	ohci->dl_end = td->next_dl_td = td;
938 	struct td	*td = NULL;
950 		td = dma_to_td (ohci, td_dma);
951 		if (!td) {
956 		td->hwINFO |= cpu_to_hc32 (ohci, TD_DONE);
957 		cc = TD_CC_GET (hc32_to_cpup (ohci, &td->hwINFO));
964 				&& (td->ed->hwHeadP & cpu_to_hc32 (ohci, ED_H)))
965 			ed_halted(ohci, td, cc);
967 		td_dma = hc32_to_cpup (ohci, &td->hwNextTD);
968 		add_to_done_list(ohci, td);
996 			struct td	*td;
999 			td = list_first_entry(&ed->td_list, struct td, td_list);
1003 			if (td->td_dma != head &&
1008 			if (td->next_dl_td)
1038 			struct td	*td;
1044 			td = list_entry (entry, struct td, td_list);
1045 			urb = td->urb;
1046 			urb_priv = td->urb->hcpriv;
1049 				prev = &td->hwNextTD;
1055 			*prev = td->hwNextTD | savebits;
1062 			tdINFO = hc32_to_cpup(ohci, &td->hwINFO);
1069 			td_done (ohci, urb, td);
1150 static void takeback_td(struct ohci_hcd *ohci, struct td *td)
1152 	struct urb	*urb = td->urb;
1154 	struct ed	*ed = td->ed;
1158 	status = td_done(ohci, urb, td);
1173 		td = list_entry(ed->td_list.next, struct td, td_list);
1174 		if (!(td->hwINFO & cpu_to_hc32(ohci, TD_DONE))) {
1200 	struct td	*td;
1203 		td = ohci->dl_start;
1204 		if (td == ohci->dl_end)
1207 			ohci->dl_start = td->next_dl_td;
1209 		takeback_td(ohci, td);