29 	struct usb_stream *s = sk->s;  in usb_stream_next_packet_size()  local
31 	return (sk->out_phase_peeked >> 16) * s->cfg.frame_size;  in usb_stream_next_packet_size()
36 	struct usb_stream *s = sk->s;  in playback_prep_freqn()  local
41 		if (s->idle_outsize + lb + l > s->period_size)  in playback_prep_freqn()
54 	s->idle_outsize += lb - s->period_size;  in playback_prep_freqn()
55 	snd_printdd(KERN_DEBUG "idle=%i ul=%i ps=%i\n", s->idle_outsize,  in playback_prep_freqn()
56 		    lb, s->period_size);  in playback_prep_freqn()
95 	struct usb_stream	*s = sk->s;  in init_urbs()  local
96 	char			*indata = (char *)s + sizeof(*s) +  in init_urbs()
98 					s->inpackets;  in init_urbs()
132 	struct usb_stream *s;  in usb_stream_free()  local
142 	s = sk->s;  in usb_stream_free()
143 	if (!s)  in usb_stream_free()
146 	free_pages((unsigned long)sk->write_page, get_order(s->write_size));  in usb_stream_free()
148 	free_pages((unsigned long)s, get_order(s->read_size));  in usb_stream_free()
149 	sk->s = NULL;  in usb_stream_free()
194 	sk->s = (void *) __get_free_pages(GFP_KERNEL|__GFP_COMP|__GFP_ZERO, pg);  in usb_stream_new()
195 	if (!sk->s) {  in usb_stream_new()
199 	sk->s->cfg.version = USB_STREAM_INTERFACE_VERSION;  in usb_stream_new()
201 	sk->s->read_size = read_size;  in usb_stream_new()
203 	sk->s->cfg.sample_rate = sample_rate;  in usb_stream_new()
204 	sk->s->cfg.frame_size = frame_size;  in usb_stream_new()
206 	sk->s->inpackets = packets * USB_STREAM_URBDEPTH;  in usb_stream_new()
207 	sk->s->cfg.period_frames = period_frames;  in usb_stream_new()
208 	sk->s->period_size = frame_size * period_frames;  in usb_stream_new()
210 	sk->s->write_size = write_size;  in usb_stream_new()
228 	sk->s->state = usb_stream_stopped;  in usb_stream_new()
230 	return sk->s;  in usb_stream_new()
276 	struct usb_stream *s = sk->s;  in usb_stream_prepare_playback()  local
284 	for (; s->sync_packet < 0; ++p, ++s->sync_packet) {  in usb_stream_prepare_playback()
287 			ii->number_of_packets + s->sync_packet;  in usb_stream_prepare_playback()
296 	     s->sync_packet < inurb->number_of_packets && p < sk->n_o_ps;  in usb_stream_prepare_playback()
297 	     ++p, ++s->sync_packet) {  in usb_stream_prepare_playback()
298 		l = inurb->iso_frame_desc[s->sync_packet].actual_length;  in usb_stream_prepare_playback()
300 		if (s->idle_outsize + lb + l > s->period_size)  in usb_stream_prepare_playback()
309 	s->sync_packet -= inurb->number_of_packets;  in usb_stream_prepare_playback()
310 	if (unlikely(s->sync_packet < -2 || s->sync_packet > 0)) {  in usb_stream_prepare_playback()
313 			   s->sync_packet, p, inurb->number_of_packets,  in usb_stream_prepare_playback()
314 			   s->idle_outsize + lb + l,  in usb_stream_prepare_playback()
315 			   s->idle_outsize, lb,  l,  in usb_stream_prepare_playback()
316 			   s->period_size);  in usb_stream_prepare_playback()
319 	if (unlikely(lb % s->cfg.frame_size)) {  in usb_stream_prepare_playback()
324 	s->idle_outsize += lb - s->period_size;  in usb_stream_prepare_playback()
327 	if (s->idle_outsize <= 0)  in usb_stream_prepare_playback()
330 	snd_printk(KERN_WARNING "idle=%i\n", s->idle_outsize);  in usb_stream_prepare_playback()
375 static void loop_back(struct usb_stream *s)  in loop_back()  argument
382 	o = s->playback1st_to;  in loop_back()
383 	ol = s->playback1st_size;  in loop_back()
386 	if (s->insplit_pack >= 0) {  in loop_back()
389 		p = s->insplit_pack;  in loop_back()
393 	for (; p < iu->number_of_packets && l < s->period_size; ++p) {  in loop_back()
396 		if (l + il > s->period_size)  in loop_back()
397 			il = s->period_size - l;  in loop_back()
405 			o = s->playback_to;  in loop_back()
408 			ol = s->period_size - s->playback1st_size;  in loop_back()
413 		if (l != s->period_size)  in loop_back()
415 			       l/(int)s->cfg.frame_size);  in loop_back()
427 static void loop_back(struct usb_stream *s)  in loop_back()  argument
435 	struct usb_stream *s = sk->s;  in stream_idle()  local
437 	int insize = s->idle_insize;  in stream_idle()
440 	s->inpacket_split = s->next_inpacket_split;  in stream_idle()
441 	s->inpacket_split_at = s->next_inpacket_split_at;  in stream_idle()
442 	s->next_inpacket_split = -1;  in stream_idle()
443 	s->next_inpacket_split_at = 0;  in stream_idle()
453 		s->inpacket_head++;  in stream_idle()
454 		s->inpacket_head %= s->inpackets;  in stream_idle()
455 		if (s->inpacket_split == -1)  in stream_idle()
456 			s->inpacket_split = s->inpacket_head;  in stream_idle()
458 		s->inpacket[s->inpacket_head].offset =  in stream_idle()
459 			id[p].offset + (inurb->transfer_buffer - (void *)s);  in stream_idle()
460 		s->inpacket[s->inpacket_head].length = l;  in stream_idle()
461 		if (insize + l > s->period_size &&  in stream_idle()
462 		    s->next_inpacket_split == -1) {  in stream_idle()
463 			s->next_inpacket_split = s->inpacket_head;  in stream_idle()
464 			s->next_inpacket_split_at = s->period_size - insize;  in stream_idle()
469 	s->idle_insize += urb_size - s->period_size;  in stream_idle()
470 	if (s->idle_insize < 0) {  in stream_idle()
472 			   (s->idle_insize)/(int)s->cfg.frame_size);  in stream_idle()
475 	s->insize_done += urb_size;  in stream_idle()
477 	l = s->idle_outsize;  in stream_idle()
478 	s->outpacket[0].offset = (sk->idle_outurb->transfer_buffer -  in stream_idle()
484 	s->outpacket[0].length = sk->idle_outurb->transfer_buffer_length + l;  in stream_idle()
485 	s->outpacket[1].offset = sk->completed_outurb->transfer_buffer -  in stream_idle()
491 	loop_back(s);  in stream_idle()
492 	s->periods_done++;  in stream_idle()
496 	s->state = usb_stream_xrun;  in stream_idle()
517 	struct usb_stream *s = sk->s;  in stream_start()  local
518 	if (s->state >= usb_stream_sync1) {  in stream_start()
522 		frames_per_packet = (s->period_size - s->idle_insize);  in stream_start()
525 			s->cfg.frame_size * inurb->number_of_packets;  in stream_start()
528 		max_diff_0 = s->cfg.frame_size;  in stream_start()
529 		if (s->cfg.period_frames >= 256)  in stream_start()
531 		if (s->cfg.period_frames >= 1024)  in stream_start()
541 				(min_frames >> 8) * s->cfg.frame_size;  in stream_start()
544 					    s->insize_done,  in stream_start()
545 					    urb_size / (int)s->cfg.frame_size,  in stream_start()
550 		s->idle_insize -= max_diff - max_diff_0;  in stream_start()
551 		s->idle_insize += urb_size - s->period_size;  in stream_start()
552 		if (s->idle_insize < 0) {  in stream_start()
554 				   s->idle_insize, urb_size, s->period_size);  in stream_start()
556 		} else if (s->idle_insize == 0) {  in stream_start()
557 			s->next_inpacket_split =  in stream_start()
558 				(s->inpacket_head + 1) % s->inpackets;  in stream_start()
559 			s->next_inpacket_split_at = 0;  in stream_start()
561 			unsigned split = s->inpacket_head;  in stream_start()
562 			l = s->idle_insize;  in stream_start()
563 			while (l > s->inpacket[split].length) {  in stream_start()
564 				l -= s->inpacket[split].length;  in stream_start()
566 					split = s->inpackets - 1;  in stream_start()
570 			s->next_inpacket_split = split;  in stream_start()
571 			s->next_inpacket_split_at =  in stream_start()
572 				s->inpacket[split].length - l;  in stream_start()
575 		s->insize_done += urb_size;  in stream_start()
586 	if (s->state == usb_stream_sync1 && s->insize_done > 360000) {  in stream_start()
588 		s->state = usb_stream_ready;  in stream_start()
598 	struct usb_stream *s = sk->s;  in i_capture_start()  local
609 		if (l < s->cfg.frame_size) {  in i_capture_start()
611 			if (s->state >= usb_stream_sync0) {  in i_capture_start()
616 		s->inpacket_head++;  in i_capture_start()
617 		s->inpacket_head %= s->inpackets;  in i_capture_start()
618 		s->inpacket[s->inpacket_head].offset =  in i_capture_start()
619 			id[p].offset + (urb->transfer_buffer - (void *)s);  in i_capture_start()
620 		s->inpacket[s->inpacket_head].length = l;  in i_capture_start()
633 	if (!empty && s->state < usb_stream_sync1)  in i_capture_start()
634 		++s->state;  in i_capture_start()
649 	struct usb_stream *s = sk->s;  in usb_stream_start()  local
654 	if (s->state != usb_stream_stopped)  in usb_stream_start()
659 	memset(sk->write_page, 0, s->write_size);  in usb_stream_start()
661 	s->insize_done = 0;  in usb_stream_start()
662 	s->idle_insize = 0;  in usb_stream_start()
663 	s->idle_outsize = 0;  in usb_stream_start()
664 	s->sync_packet = -1;  in usb_stream_start()
665 	s->inpacket_head = -1;  in usb_stream_start()
729 		while (s->state != usb_stream_ready && wait_ms > 0) {  in usb_stream_start()
730 			snd_printdd(KERN_DEBUG "%i\n", s->state);  in usb_stream_start()
736 	return s->state == usb_stream_ready ? 0 : -EFAULT;  in usb_stream_start()
745 	if (!sk->s)  in usb_stream_stop()
751 	sk->s->state = usb_stream_stopped;  in usb_stream_stop()