15 	struct usb_stream *s = sk->s;  in usb_stream_next_packet_size()  local
18 	return (sk->out_phase_peeked >> 16) * s->cfg.frame_size;  in usb_stream_next_packet_size()
23 	struct usb_stream *s = sk->s;  in playback_prep_freqn()  local
29 		if (s->idle_outsize + lb + l > s->period_size)  in playback_prep_freqn()
41 	s->idle_outsize += lb - s->period_size;  in playback_prep_freqn()
86 	struct usb_stream	*s = sk->s;  in init_urbs()  local
88 		(char *)s + sizeof(*s) + sizeof(struct usb_stream_packet) * s->inpackets;  in init_urbs()
129 	struct usb_stream *s;  in usb_stream_free()  local
139 	s = sk->s;  in usb_stream_free()
140 	if (!s)  in usb_stream_free()
144 		free_pages_exact(sk->write_page, s->write_size);  in usb_stream_free()
148 	free_pages_exact(s, s->read_size);  in usb_stream_free()
149 	sk->s = NULL;  in usb_stream_free()
191 		dev_warn(&dev->dev, "%s: a size exceeds 128*PAGE_SIZE\n", __func__);  in usb_stream_new()
195 	sk->s = alloc_pages_exact(read_size,  in usb_stream_new()
197 	if (!sk->s) {  in usb_stream_new()
201 	sk->s->cfg.version = USB_STREAM_INTERFACE_VERSION;  in usb_stream_new()
203 	sk->s->read_size = read_size;  in usb_stream_new()
205 	sk->s->cfg.sample_rate = sample_rate;  in usb_stream_new()
206 	sk->s->cfg.frame_size = frame_size;  in usb_stream_new()
208 	sk->s->inpackets = packets * USB_STREAM_URBDEPTH;  in usb_stream_new()
209 	sk->s->cfg.period_frames = period_frames;  in usb_stream_new()
210 	sk->s->period_size = frame_size * period_frames;  in usb_stream_new()
212 	sk->s->write_size = write_size;  in usb_stream_new()
233 	sk->s->state = usb_stream_stopped;  in usb_stream_new()
235 	return sk->s;  in usb_stream_new()
246 			dev_warn(&sk->dev->dev, "%s: status=%i\n", __func__,  in balance_check()
283 	struct usb_stream *s = sk->s;  in usb_stream_prepare_playback()  local
291 	for (; s->sync_packet < 0; ++p, ++s->sync_packet) {  in usb_stream_prepare_playback()
295 			ii->number_of_packets + s->sync_packet;  in usb_stream_prepare_playback()
304 	     s->sync_packet < inurb->number_of_packets && p < sk->n_o_ps;  in usb_stream_prepare_playback()
305 	     ++p, ++s->sync_packet) {  in usb_stream_prepare_playback()
306 		l = inurb->iso_frame_desc[s->sync_packet].actual_length;  in usb_stream_prepare_playback()
308 		if (s->idle_outsize + lb + l > s->period_size)  in usb_stream_prepare_playback()
317 	s->sync_packet -= inurb->number_of_packets;  in usb_stream_prepare_playback()
318 	if (unlikely(s->sync_packet < -2 || s->sync_packet > 0)) {  in usb_stream_prepare_playback()
320 			 "%s: invalid sync_packet = %i; p=%i nop=%i %i %x %x %x > %x\n",  in usb_stream_prepare_playback()
322 			 s->sync_packet, p, inurb->number_of_packets,  in usb_stream_prepare_playback()
323 			 s->idle_outsize + lb + l,  in usb_stream_prepare_playback()
324 			 s->idle_outsize, lb,  l,  in usb_stream_prepare_playback()
325 			 s->period_size);  in usb_stream_prepare_playback()
328 	if (unlikely(lb % s->cfg.frame_size)) {  in usb_stream_prepare_playback()
329 		dev_warn(&sk->dev->dev, "%s: invalid outsize = %i\n",  in usb_stream_prepare_playback()
333 	s->idle_outsize += lb - s->period_size;  in usb_stream_prepare_playback()
336 	if (s->idle_outsize <= 0)  in usb_stream_prepare_playback()
339 	dev_warn(&sk->dev->dev, "%s: idle=%i\n", __func__, s->idle_outsize);  in usb_stream_prepare_playback()
379 	dev_err(&sk->dev->dev, "%s error: %i\n", __func__, err);  in submit_urbs()
387 static void loop_back(struct usb_stream *s)  in loop_back()  argument
394 	o = s->playback1st_to;  in loop_back()
395 	ol = s->playback1st_size;  in loop_back()
398 	if (s->insplit_pack >= 0) {  in loop_back()
401 		p = s->insplit_pack;  in loop_back()
405 	for (; p < iu->number_of_packets && l < s->period_size; ++p) {  in loop_back()
408 		if (l + il > s->period_size)  in loop_back()
409 			il = s->period_size - l;  in loop_back()
417 			o = s->playback_to;  in loop_back()
420 			ol = s->period_size - s->playback1st_size;  in loop_back()
425 		if (l != s->period_size)  in loop_back()
426 			dev_dbg(&sk->dev->dev, "%s:%i %i\n", __func__, __LINE__,  in loop_back()
427 				l/(int)s->cfg.frame_size);  in loop_back()
439 static void loop_back(struct usb_stream *s)  in loop_back()  argument
447 	struct usb_stream *s = sk->s;  in stream_idle()  local
449 	int insize = s->idle_insize;  in stream_idle()
452 	s->inpacket_split = s->next_inpacket_split;  in stream_idle()
453 	s->inpacket_split_at = s->next_inpacket_split_at;  in stream_idle()
454 	s->next_inpacket_split = -1;  in stream_idle()
455 	s->next_inpacket_split_at = 0;  in stream_idle()
462 			dev_warn(&sk->dev->dev, "%s: underrun, status=%u\n",  in stream_idle()
466 		s->inpacket_head++;  in stream_idle()
467 		s->inpacket_head %= s->inpackets;  in stream_idle()
468 		if (s->inpacket_split == -1)  in stream_idle()
469 			s->inpacket_split = s->inpacket_head;  in stream_idle()
471 		s->inpacket[s->inpacket_head].offset =  in stream_idle()
472 			id[p].offset + (inurb->transfer_buffer - (void *)s);  in stream_idle()
473 		s->inpacket[s->inpacket_head].length = l;  in stream_idle()
474 		if (insize + l > s->period_size &&  in stream_idle()
475 		    s->next_inpacket_split == -1) {  in stream_idle()
476 			s->next_inpacket_split = s->inpacket_head;  in stream_idle()
477 			s->next_inpacket_split_at = s->period_size - insize;  in stream_idle()
482 	s->idle_insize += urb_size - s->period_size;  in stream_idle()
483 	if (s->idle_insize < 0) {  in stream_idle()
484 		dev_warn(&sk->dev->dev, "%s error: %i\n", __func__,  in stream_idle()
485 			 (s->idle_insize)/(int)s->cfg.frame_size);  in stream_idle()
488 	s->insize_done += urb_size;  in stream_idle()
490 	l = s->idle_outsize;  in stream_idle()
491 	s->outpacket[0].offset = (sk->idle_outurb->transfer_buffer -  in stream_idle()
497 	s->outpacket[0].length = sk->idle_outurb->transfer_buffer_length + l;  in stream_idle()
498 	s->outpacket[1].offset = sk->completed_outurb->transfer_buffer -  in stream_idle()
504 	loop_back(s);  in stream_idle()
505 	s->periods_done++;  in stream_idle()
509 	s->state = usb_stream_xrun;  in stream_idle()
532 	struct usb_stream *s = sk->s;  in stream_start()  local
534 	if (s->state >= usb_stream_sync1) {  in stream_start()
539 		frames_per_packet = (s->period_size - s->idle_insize);  in stream_start()
542 			s->cfg.frame_size * inurb->number_of_packets;  in stream_start()
545 		max_diff_0 = s->cfg.frame_size;  in stream_start()
546 		if (s->cfg.period_frames >= 256)  in stream_start()
548 		if (s->cfg.period_frames >= 1024)  in stream_start()
559 				(min_frames >> 8) * s->cfg.frame_size;  in stream_start()
563 		s->idle_insize -= max_diff - max_diff_0;  in stream_start()
564 		s->idle_insize += urb_size - s->period_size;  in stream_start()
565 		if (s->idle_insize < 0) {  in stream_start()
566 			dev_warn(&sk->dev->dev, "%s idle_insize: %i %i %i\n",  in stream_start()
568 				 s->idle_insize, urb_size, s->period_size);  in stream_start()
570 		} else if (s->idle_insize == 0) {  in stream_start()
571 			s->next_inpacket_split =  in stream_start()
572 				(s->inpacket_head + 1) % s->inpackets;  in stream_start()
573 			s->next_inpacket_split_at = 0;  in stream_start()
575 			unsigned int split = s->inpacket_head;  in stream_start()
577 			l = s->idle_insize;  in stream_start()
578 			while (l > s->inpacket[split].length) {  in stream_start()
579 				l -= s->inpacket[split].length;  in stream_start()
581 					split = s->inpackets - 1;  in stream_start()
585 			s->next_inpacket_split = split;  in stream_start()
586 			s->next_inpacket_split_at =  in stream_start()
587 				s->inpacket[split].length - l;  in stream_start()
590 		s->insize_done += urb_size;  in stream_start()
601 	if (s->state == usb_stream_sync1 && s->insize_done > 360000) {  in stream_start()
603 		s->state = usb_stream_ready;  in stream_start()
613 	struct usb_stream *s = sk->s;  in i_capture_start()  local
618 		dev_warn(&sk->dev->dev, "%s: status=%i\n", __func__, urb->status);  in i_capture_start()
625 		if (l < s->cfg.frame_size) {  in i_capture_start()
627 			if (s->state >= usb_stream_sync0) {  in i_capture_start()
628 				dev_warn(&sk->dev->dev, "%s: length %i\n", __func__, l);  in i_capture_start()
632 		s->inpacket_head++;  in i_capture_start()
633 		s->inpacket_head %= s->inpackets;  in i_capture_start()
634 		s->inpacket[s->inpacket_head].offset =  in i_capture_start()
635 			id[p].offset + (urb->transfer_buffer - (void *)s);  in i_capture_start()
636 		s->inpacket[s->inpacket_head].length = l;  in i_capture_start()
640 		dev_dbg(&sk->dev->dev, "%s:%i: %i", __func__, __LINE__,  in i_capture_start()
650 	if (!empty && s->state < usb_stream_sync1)  in i_capture_start()
651 		++s->state;  in i_capture_start()
667 	struct usb_stream *s = sk->s;  in usb_stream_start()  local
672 	if (s->state != usb_stream_stopped)  in usb_stream_start()
677 	memset(sk->write_page, 0, s->write_size);  in usb_stream_start()
679 	s->insize_done = 0;  in usb_stream_start()
680 	s->idle_insize = 0;  in usb_stream_start()
681 	s->idle_outsize = 0;  in usb_stream_start()
682 	s->sync_packet = -1;  in usb_stream_start()
683 	s->inpacket_head = -1;  in usb_stream_start()
708 				"%s: usb_submit_urb(sk->inurb[%i]) returned %i\n",  in usb_stream_start()
715 				"%s: usb_submit_urb(sk->outurb[%i]) returned %i\n",  in usb_stream_start()
722 				"%s: u[%i] start_frames differ in:%u out:%u\n",  in usb_stream_start()
737 			 "%s: couldn't start all urbs on the same start_frame.\n",  in usb_stream_start()
751 		while (s->state != usb_stream_ready && wait_ms > 0) {  in usb_stream_start()
757 	return s->state == usb_stream_ready ? 0 : -EFAULT;  in usb_stream_start()
767 	if (!sk->s)  in usb_stream_stop()
773 	sk->s->state = usb_stream_stopped;  in usb_stream_stop()