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18#include <linux/gfp.h>
19#include <linux/init.h>
20#include <linux/ratelimit.h>
21#include <linux/usb.h>
22#include <linux/usb/audio.h>
23#include <linux/slab.h>
24
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28
29#include "usbaudio.h"
30#include "helper.h"
31#include "card.h"
32#include "endpoint.h"
33#include "pcm.h"
34#include "quirks.h"
35
36#define EP_FLAG_RUNNING 1
37#define EP_FLAG_STOPPING 2
38
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69
70static inline unsigned get_usb_full_speed_rate(unsigned int rate)
71{
72 return ((rate << 13) + 62) / 125;
73}
74
75
76
77
78
79static inline unsigned get_usb_high_speed_rate(unsigned int rate)
80{
81 return ((rate << 10) + 62) / 125;
82}
83
84
85
86
87static void release_urb_ctx(struct snd_urb_ctx *u)
88{
89 if (u->buffer_size)
90 usb_free_coherent(u->ep->chip->dev, u->buffer_size,
91 u->urb->transfer_buffer,
92 u->urb->transfer_dma);
93 usb_free_urb(u->urb);
94 u->urb = NULL;
95}
96
97static const char *usb_error_string(int err)
98{
99 switch (err) {
100 case -ENODEV:
101 return "no device";
102 case -ENOENT:
103 return "endpoint not enabled";
104 case -EPIPE:
105 return "endpoint stalled";
106 case -ENOSPC:
107 return "not enough bandwidth";
108 case -ESHUTDOWN:
109 return "device disabled";
110 case -EHOSTUNREACH:
111 return "device suspended";
112 case -EINVAL:
113 case -EAGAIN:
114 case -EFBIG:
115 case -EMSGSIZE:
116 return "internal error";
117 default:
118 return "unknown error";
119 }
120}
121
122
123
124
125
126
127
128
129
130int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep)
131{
132 return ep->sync_master &&
133 ep->sync_master->type == SND_USB_ENDPOINT_TYPE_DATA &&
134 ep->type == SND_USB_ENDPOINT_TYPE_DATA &&
135 usb_pipeout(ep->pipe);
136}
137
138
139
140
141
142
143
144
145int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep)
146{
147 unsigned long flags;
148 int ret;
149
150 if (ep->fill_max)
151 return ep->maxframesize;
152
153 spin_lock_irqsave(&ep->lock, flags);
154 ep->phase = (ep->phase & 0xffff)
155 + (ep->freqm << ep->datainterval);
156 ret = min(ep->phase >> 16, ep->maxframesize);
157 spin_unlock_irqrestore(&ep->lock, flags);
158
159 return ret;
160}
161
162static void retire_outbound_urb(struct snd_usb_endpoint *ep,
163 struct snd_urb_ctx *urb_ctx)
164{
165 if (ep->retire_data_urb)
166 ep->retire_data_urb(ep->data_subs, urb_ctx->urb);
167}
168
169static void retire_inbound_urb(struct snd_usb_endpoint *ep,
170 struct snd_urb_ctx *urb_ctx)
171{
172 struct urb *urb = urb_ctx->urb;
173
174 if (unlikely(ep->skip_packets > 0)) {
175 ep->skip_packets--;
176 return;
177 }
178
179 if (ep->sync_slave)
180 snd_usb_handle_sync_urb(ep->sync_slave, ep, urb);
181
182 if (ep->retire_data_urb)
183 ep->retire_data_urb(ep->data_subs, urb);
184}
185
186static void prepare_silent_urb(struct snd_usb_endpoint *ep,
187 struct snd_urb_ctx *ctx)
188{
189 struct urb *urb = ctx->urb;
190 unsigned int offs = 0;
191 unsigned int extra = 0;
192 __le32 packet_length;
193 int i;
194
195
196 if (ep->chip->tx_length_quirk)
197 extra = sizeof(packet_length);
198
199 for (i = 0; i < ctx->packets; ++i) {
200 unsigned int offset;
201 unsigned int length;
202 int counts;
203
204 if (ctx->packet_size[i])
205 counts = ctx->packet_size[i];
206 else
207 counts = snd_usb_endpoint_next_packet_size(ep);
208
209 length = counts * ep->stride;
210 offset = offs * ep->stride + extra * i;
211 urb->iso_frame_desc[i].offset = offset;
212 urb->iso_frame_desc[i].length = length + extra;
213 if (extra) {
214 packet_length = cpu_to_le32(length);
215 memcpy(urb->transfer_buffer + offset,
216 &packet_length, sizeof(packet_length));
217 }
218 memset(urb->transfer_buffer + offset + extra,
219 ep->silence_value, length);
220 offs += counts;
221 }
222
223 urb->number_of_packets = ctx->packets;
224 urb->transfer_buffer_length = offs * ep->stride + ctx->packets * extra;
225}
226
227
228
229
230static void prepare_outbound_urb(struct snd_usb_endpoint *ep,
231 struct snd_urb_ctx *ctx)
232{
233 struct urb *urb = ctx->urb;
234 unsigned char *cp = urb->transfer_buffer;
235
236 urb->dev = ep->chip->dev;
237
238 switch (ep->type) {
239 case SND_USB_ENDPOINT_TYPE_DATA:
240 if (ep->prepare_data_urb) {
241 ep->prepare_data_urb(ep->data_subs, urb);
242 } else {
243
244 prepare_silent_urb(ep, ctx);
245 }
246 break;
247
248 case SND_USB_ENDPOINT_TYPE_SYNC:
249 if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) {
250
251
252
253
254 urb->iso_frame_desc[0].length = 4;
255 urb->iso_frame_desc[0].offset = 0;
256 cp[0] = ep->freqn;
257 cp[1] = ep->freqn >> 8;
258 cp[2] = ep->freqn >> 16;
259 cp[3] = ep->freqn >> 24;
260 } else {
261
262
263
264
265 urb->iso_frame_desc[0].length = 3;
266 urb->iso_frame_desc[0].offset = 0;
267 cp[0] = ep->freqn >> 2;
268 cp[1] = ep->freqn >> 10;
269 cp[2] = ep->freqn >> 18;
270 }
271
272 break;
273 }
274}
275
276
277
278
279static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep,
280 struct snd_urb_ctx *urb_ctx)
281{
282 int i, offs;
283 struct urb *urb = urb_ctx->urb;
284
285 urb->dev = ep->chip->dev;
286
287 switch (ep->type) {
288 case SND_USB_ENDPOINT_TYPE_DATA:
289 offs = 0;
290 for (i = 0; i < urb_ctx->packets; i++) {
291 urb->iso_frame_desc[i].offset = offs;
292 urb->iso_frame_desc[i].length = ep->curpacksize;
293 offs += ep->curpacksize;
294 }
295
296 urb->transfer_buffer_length = offs;
297 urb->number_of_packets = urb_ctx->packets;
298 break;
299
300 case SND_USB_ENDPOINT_TYPE_SYNC:
301 urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize);
302 urb->iso_frame_desc[0].offset = 0;
303 break;
304 }
305}
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320
321static void queue_pending_output_urbs(struct snd_usb_endpoint *ep)
322{
323 while (test_bit(EP_FLAG_RUNNING, &ep->flags)) {
324
325 unsigned long flags;
326 struct snd_usb_packet_info *uninitialized_var(packet);
327 struct snd_urb_ctx *ctx = NULL;
328 struct urb *urb;
329 int err, i;
330
331 spin_lock_irqsave(&ep->lock, flags);
332 if (ep->next_packet_read_pos != ep->next_packet_write_pos) {
333 packet = ep->next_packet + ep->next_packet_read_pos;
334 ep->next_packet_read_pos++;
335 ep->next_packet_read_pos %= MAX_URBS;
336
337
338 if (!list_empty(&ep->ready_playback_urbs))
339 ctx = list_first_entry(&ep->ready_playback_urbs,
340 struct snd_urb_ctx, ready_list);
341 }
342 spin_unlock_irqrestore(&ep->lock, flags);
343
344 if (ctx == NULL)
345 return;
346
347 list_del_init(&ctx->ready_list);
348 urb = ctx->urb;
349
350
351 for (i = 0; i < packet->packets; i++)
352 ctx->packet_size[i] = packet->packet_size[i];
353
354
355 prepare_outbound_urb(ep, ctx);
356
357 err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
358 if (err < 0)
359 usb_audio_err(ep->chip,
360 "Unable to submit urb #%d: %d (urb %p)\n",
361 ctx->index, err, ctx->urb);
362 else
363 set_bit(ctx->index, &ep->active_mask);
364 }
365}
366
367
368
369
370static void snd_complete_urb(struct urb *urb)
371{
372 struct snd_urb_ctx *ctx = urb->context;
373 struct snd_usb_endpoint *ep = ctx->ep;
374 struct snd_pcm_substream *substream;
375 unsigned long flags;
376 int err;
377
378 if (unlikely(urb->status == -ENOENT ||
379 urb->status == -ENODEV ||
380 urb->status == -ECONNRESET ||
381 urb->status == -ESHUTDOWN))
382 goto exit_clear;
383
384 if (unlikely(atomic_read(&ep->chip->shutdown)))
385 goto exit_clear;
386
387 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
388 goto exit_clear;
389
390 if (usb_pipeout(ep->pipe)) {
391 retire_outbound_urb(ep, ctx);
392
393 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
394 goto exit_clear;
395
396 if (snd_usb_endpoint_implicit_feedback_sink(ep)) {
397 spin_lock_irqsave(&ep->lock, flags);
398 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
399 spin_unlock_irqrestore(&ep->lock, flags);
400 queue_pending_output_urbs(ep);
401
402 goto exit_clear;
403 }
404
405 prepare_outbound_urb(ep, ctx);
406 } else {
407 retire_inbound_urb(ep, ctx);
408
409 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
410 goto exit_clear;
411
412 prepare_inbound_urb(ep, ctx);
413 }
414
415 err = usb_submit_urb(urb, GFP_ATOMIC);
416 if (err == 0)
417 return;
418
419 usb_audio_err(ep->chip, "cannot submit urb (err = %d)\n", err);
420 if (ep->data_subs && ep->data_subs->pcm_substream) {
421 substream = ep->data_subs->pcm_substream;
422 snd_pcm_stop_xrun(substream);
423 }
424
425exit_clear:
426 clear_bit(ctx->index, &ep->active_mask);
427}
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447
448struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
449 struct usb_host_interface *alts,
450 int ep_num, int direction, int type)
451{
452 struct snd_usb_endpoint *ep;
453 int is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK;
454
455 if (WARN_ON(!alts))
456 return NULL;
457
458 mutex_lock(&chip->mutex);
459
460 list_for_each_entry(ep, &chip->ep_list, list) {
461 if (ep->ep_num == ep_num &&
462 ep->iface == alts->desc.bInterfaceNumber &&
463 ep->altsetting == alts->desc.bAlternateSetting) {
464 usb_audio_dbg(ep->chip,
465 "Re-using EP %x in iface %d,%d @%p\n",
466 ep_num, ep->iface, ep->altsetting, ep);
467 goto __exit_unlock;
468 }
469 }
470
471 usb_audio_dbg(chip, "Creating new %s %s endpoint #%x\n",
472 is_playback ? "playback" : "capture",
473 type == SND_USB_ENDPOINT_TYPE_DATA ? "data" : "sync",
474 ep_num);
475
476 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
477 if (!ep)
478 goto __exit_unlock;
479
480 ep->chip = chip;
481 spin_lock_init(&ep->lock);
482 ep->type = type;
483 ep->ep_num = ep_num;
484 ep->iface = alts->desc.bInterfaceNumber;
485 ep->altsetting = alts->desc.bAlternateSetting;
486 INIT_LIST_HEAD(&ep->ready_playback_urbs);
487 ep_num &= USB_ENDPOINT_NUMBER_MASK;
488
489 if (is_playback)
490 ep->pipe = usb_sndisocpipe(chip->dev, ep_num);
491 else
492 ep->pipe = usb_rcvisocpipe(chip->dev, ep_num);
493
494 if (type == SND_USB_ENDPOINT_TYPE_SYNC) {
495 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
496 get_endpoint(alts, 1)->bRefresh >= 1 &&
497 get_endpoint(alts, 1)->bRefresh <= 9)
498 ep->syncinterval = get_endpoint(alts, 1)->bRefresh;
499 else if (snd_usb_get_speed(chip->dev) == USB_SPEED_FULL)
500 ep->syncinterval = 1;
501 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
502 get_endpoint(alts, 1)->bInterval <= 16)
503 ep->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
504 else
505 ep->syncinterval = 3;
506
507 ep->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
508 }
509
510 list_add_tail(&ep->list, &chip->ep_list);
511
512__exit_unlock:
513 mutex_unlock(&chip->mutex);
514
515 return ep;
516}
517
518
519
520
521static int wait_clear_urbs(struct snd_usb_endpoint *ep)
522{
523 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
524 int alive;
525
526 do {
527 alive = bitmap_weight(&ep->active_mask, ep->nurbs);
528 if (!alive)
529 break;
530
531 schedule_timeout_uninterruptible(1);
532 } while (time_before(jiffies, end_time));
533
534 if (alive)
535 usb_audio_err(ep->chip,
536 "timeout: still %d active urbs on EP #%x\n",
537 alive, ep->ep_num);
538 clear_bit(EP_FLAG_STOPPING, &ep->flags);
539
540 ep->data_subs = NULL;
541 ep->sync_slave = NULL;
542 ep->retire_data_urb = NULL;
543 ep->prepare_data_urb = NULL;
544
545 return 0;
546}
547
548
549
550
551void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep)
552{
553 if (ep && test_bit(EP_FLAG_STOPPING, &ep->flags))
554 wait_clear_urbs(ep);
555}
556
557
558
559
560static int deactivate_urbs(struct snd_usb_endpoint *ep, bool force)
561{
562 unsigned int i;
563
564 if (!force && atomic_read(&ep->chip->shutdown))
565 return -EBADFD;
566
567 clear_bit(EP_FLAG_RUNNING, &ep->flags);
568
569 INIT_LIST_HEAD(&ep->ready_playback_urbs);
570 ep->next_packet_read_pos = 0;
571 ep->next_packet_write_pos = 0;
572
573 for (i = 0; i < ep->nurbs; i++) {
574 if (test_bit(i, &ep->active_mask)) {
575 if (!test_and_set_bit(i, &ep->unlink_mask)) {
576 struct urb *u = ep->urb[i].urb;
577 usb_unlink_urb(u);
578 }
579 }
580 }
581
582 return 0;
583}
584
585
586
587
588static void release_urbs(struct snd_usb_endpoint *ep, int force)
589{
590 int i;
591
592
593 ep->retire_data_urb = NULL;
594 ep->prepare_data_urb = NULL;
595
596
597 deactivate_urbs(ep, force);
598 wait_clear_urbs(ep);
599
600 for (i = 0; i < ep->nurbs; i++)
601 release_urb_ctx(&ep->urb[i]);
602
603 if (ep->syncbuf)
604 usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
605 ep->syncbuf, ep->sync_dma);
606
607 ep->syncbuf = NULL;
608 ep->nurbs = 0;
609}
610
611
612
613
614static int data_ep_set_params(struct snd_usb_endpoint *ep,
615 snd_pcm_format_t pcm_format,
616 unsigned int channels,
617 unsigned int period_bytes,
618 unsigned int frames_per_period,
619 unsigned int periods_per_buffer,
620 struct audioformat *fmt,
621 struct snd_usb_endpoint *sync_ep)
622{
623 unsigned int maxsize, minsize, packs_per_ms, max_packs_per_urb;
624 unsigned int max_packs_per_period, urbs_per_period, urb_packs;
625 unsigned int max_urbs, i;
626 int frame_bits = snd_pcm_format_physical_width(pcm_format) * channels;
627 int tx_length_quirk = (ep->chip->tx_length_quirk &&
628 usb_pipeout(ep->pipe));
629
630 if (pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && fmt->dsd_dop) {
631
632
633
634
635
636 frame_bits += channels << 3;
637 }
638
639 ep->datainterval = fmt->datainterval;
640 ep->stride = frame_bits >> 3;
641
642 switch (pcm_format) {
643 case SNDRV_PCM_FORMAT_U8:
644 ep->silence_value = 0x80;
645 break;
646 case SNDRV_PCM_FORMAT_DSD_U8:
647 case SNDRV_PCM_FORMAT_DSD_U16_LE:
648 case SNDRV_PCM_FORMAT_DSD_U32_LE:
649 case SNDRV_PCM_FORMAT_DSD_U16_BE:
650 case SNDRV_PCM_FORMAT_DSD_U32_BE:
651 ep->silence_value = 0x69;
652 break;
653 default:
654 ep->silence_value = 0;
655 }
656
657
658 ep->freqmax = ep->freqn + (ep->freqn >> 1);
659
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669
670
671
672
673
674 maxsize = (((ep->freqmax << ep->datainterval) + 0xffff) >> 16) *
675 (frame_bits >> 3);
676 if (tx_length_quirk)
677 maxsize += sizeof(__le32);
678
679 if (ep->maxpacksize && ep->maxpacksize < maxsize) {
680
681 unsigned int data_maxsize = maxsize = ep->maxpacksize;
682
683 if (tx_length_quirk)
684
685 data_maxsize -= sizeof(__le32);
686 ep->freqmax = (data_maxsize / (frame_bits >> 3))
687 << (16 - ep->datainterval);
688 }
689
690 if (ep->fill_max)
691 ep->curpacksize = ep->maxpacksize;
692 else
693 ep->curpacksize = maxsize;
694
695 if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL) {
696 packs_per_ms = 8 >> ep->datainterval;
697 max_packs_per_urb = MAX_PACKS_HS;
698 } else {
699 packs_per_ms = 1;
700 max_packs_per_urb = MAX_PACKS;
701 }
702 if (sync_ep && !snd_usb_endpoint_implicit_feedback_sink(ep))
703 max_packs_per_urb = min(max_packs_per_urb,
704 1U << sync_ep->syncinterval);
705 max_packs_per_urb = max(1u, max_packs_per_urb >> ep->datainterval);
706
707
708
709
710
711
712
713
714
715 if (usb_pipein(ep->pipe) ||
716 snd_usb_endpoint_implicit_feedback_sink(ep)) {
717
718 urb_packs = packs_per_ms;
719
720
721
722
723
724
725 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_WIRELESS) {
726 int interval = ep->datainterval;
727 while (interval < 5) {
728 urb_packs <<= 1;
729 ++interval;
730 }
731 }
732
733 urb_packs = min(max_packs_per_urb, urb_packs);
734 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
735 urb_packs >>= 1;
736 ep->nurbs = MAX_URBS;
737
738
739
740
741
742
743
744 } else {
745
746 minsize = (ep->freqn >> (16 - ep->datainterval)) *
747 (frame_bits >> 3);
748
749 if (sync_ep)
750 minsize -= minsize >> 3;
751 minsize = max(minsize, 1u);
752
753
754 max_packs_per_period = DIV_ROUND_UP(period_bytes, minsize);
755
756
757 urbs_per_period = DIV_ROUND_UP(max_packs_per_period,
758 max_packs_per_urb);
759
760 urb_packs = DIV_ROUND_UP(max_packs_per_period, urbs_per_period);
761
762
763 ep->max_urb_frames = DIV_ROUND_UP(frames_per_period,
764 urbs_per_period);
765
766
767 max_urbs = min((unsigned) MAX_URBS,
768 MAX_QUEUE * packs_per_ms / urb_packs);
769 ep->nurbs = min(max_urbs, urbs_per_period * periods_per_buffer);
770 }
771
772
773 for (i = 0; i < ep->nurbs; i++) {
774 struct snd_urb_ctx *u = &ep->urb[i];
775 u->index = i;
776 u->ep = ep;
777 u->packets = urb_packs;
778 u->buffer_size = maxsize * u->packets;
779
780 if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
781 u->packets++;
782 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
783 if (!u->urb)
784 goto out_of_memory;
785
786 u->urb->transfer_buffer =
787 usb_alloc_coherent(ep->chip->dev, u->buffer_size,
788 GFP_KERNEL, &u->urb->transfer_dma);
789 if (!u->urb->transfer_buffer)
790 goto out_of_memory;
791 u->urb->pipe = ep->pipe;
792 u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
793 u->urb->interval = 1 << ep->datainterval;
794 u->urb->context = u;
795 u->urb->complete = snd_complete_urb;
796 INIT_LIST_HEAD(&u->ready_list);
797 }
798
799 return 0;
800
801out_of_memory:
802 release_urbs(ep, 0);
803 return -ENOMEM;
804}
805
806
807
808
809static int sync_ep_set_params(struct snd_usb_endpoint *ep)
810{
811 int i;
812
813 ep->syncbuf = usb_alloc_coherent(ep->chip->dev, SYNC_URBS * 4,
814 GFP_KERNEL, &ep->sync_dma);
815 if (!ep->syncbuf)
816 return -ENOMEM;
817
818 for (i = 0; i < SYNC_URBS; i++) {
819 struct snd_urb_ctx *u = &ep->urb[i];
820 u->index = i;
821 u->ep = ep;
822 u->packets = 1;
823 u->urb = usb_alloc_urb(1, GFP_KERNEL);
824 if (!u->urb)
825 goto out_of_memory;
826 u->urb->transfer_buffer = ep->syncbuf + i * 4;
827 u->urb->transfer_dma = ep->sync_dma + i * 4;
828 u->urb->transfer_buffer_length = 4;
829 u->urb->pipe = ep->pipe;
830 u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
831 u->urb->number_of_packets = 1;
832 u->urb->interval = 1 << ep->syncinterval;
833 u->urb->context = u;
834 u->urb->complete = snd_complete_urb;
835 }
836
837 ep->nurbs = SYNC_URBS;
838
839 return 0;
840
841out_of_memory:
842 release_urbs(ep, 0);
843 return -ENOMEM;
844}
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863int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
864 snd_pcm_format_t pcm_format,
865 unsigned int channels,
866 unsigned int period_bytes,
867 unsigned int period_frames,
868 unsigned int buffer_periods,
869 unsigned int rate,
870 struct audioformat *fmt,
871 struct snd_usb_endpoint *sync_ep)
872{
873 int err;
874
875 if (ep->use_count != 0) {
876 usb_audio_warn(ep->chip,
877 "Unable to change format on ep #%x: already in use\n",
878 ep->ep_num);
879 return -EBUSY;
880 }
881
882
883 release_urbs(ep, 0);
884
885 ep->datainterval = fmt->datainterval;
886 ep->maxpacksize = fmt->maxpacksize;
887 ep->fill_max = !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX);
888
889 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL)
890 ep->freqn = get_usb_full_speed_rate(rate);
891 else
892 ep->freqn = get_usb_high_speed_rate(rate);
893
894
895 ep->freqm = ep->freqn;
896 ep->freqshift = INT_MIN;
897
898 ep->phase = 0;
899
900 switch (ep->type) {
901 case SND_USB_ENDPOINT_TYPE_DATA:
902 err = data_ep_set_params(ep, pcm_format, channels,
903 period_bytes, period_frames,
904 buffer_periods, fmt, sync_ep);
905 break;
906 case SND_USB_ENDPOINT_TYPE_SYNC:
907 err = sync_ep_set_params(ep);
908 break;
909 default:
910 err = -EINVAL;
911 }
912
913 usb_audio_dbg(ep->chip,
914 "Setting params for ep #%x (type %d, %d urbs), ret=%d\n",
915 ep->ep_num, ep->type, ep->nurbs, err);
916
917 return err;
918}
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933int snd_usb_endpoint_start(struct snd_usb_endpoint *ep)
934{
935 int err;
936 unsigned int i;
937
938 if (atomic_read(&ep->chip->shutdown))
939 return -EBADFD;
940
941
942 if (++ep->use_count != 1)
943 return 0;
944
945
946 deactivate_urbs(ep, false);
947
948 ep->active_mask = 0;
949 ep->unlink_mask = 0;
950 ep->phase = 0;
951
952 snd_usb_endpoint_start_quirk(ep);
953
954
955
956
957
958
959
960
961 set_bit(EP_FLAG_RUNNING, &ep->flags);
962
963 if (snd_usb_endpoint_implicit_feedback_sink(ep)) {
964 for (i = 0; i < ep->nurbs; i++) {
965 struct snd_urb_ctx *ctx = ep->urb + i;
966 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
967 }
968
969 return 0;
970 }
971
972 for (i = 0; i < ep->nurbs; i++) {
973 struct urb *urb = ep->urb[i].urb;
974
975 if (snd_BUG_ON(!urb))
976 goto __error;
977
978 if (usb_pipeout(ep->pipe)) {
979 prepare_outbound_urb(ep, urb->context);
980 } else {
981 prepare_inbound_urb(ep, urb->context);
982 }
983
984 err = usb_submit_urb(urb, GFP_ATOMIC);
985 if (err < 0) {
986 usb_audio_err(ep->chip,
987 "cannot submit urb %d, error %d: %s\n",
988 i, err, usb_error_string(err));
989 goto __error;
990 }
991 set_bit(i, &ep->active_mask);
992 }
993
994 return 0;
995
996__error:
997 clear_bit(EP_FLAG_RUNNING, &ep->flags);
998 ep->use_count--;
999 deactivate_urbs(ep, false);
1000 return -EPIPE;
1001}
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep)
1018{
1019 if (!ep)
1020 return;
1021
1022 if (snd_BUG_ON(ep->use_count == 0))
1023 return;
1024
1025 if (--ep->use_count == 0) {
1026 deactivate_urbs(ep, false);
1027 set_bit(EP_FLAG_STOPPING, &ep->flags);
1028 }
1029}
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep)
1042{
1043 if (!ep)
1044 return;
1045
1046 if (ep->use_count != 0)
1047 return;
1048
1049 deactivate_urbs(ep, true);
1050 wait_clear_urbs(ep);
1051}
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061void snd_usb_endpoint_release(struct snd_usb_endpoint *ep)
1062{
1063 release_urbs(ep, 1);
1064}
1065
1066
1067
1068
1069
1070
1071
1072
1073void snd_usb_endpoint_free(struct snd_usb_endpoint *ep)
1074{
1075 kfree(ep);
1076}
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
1089 struct snd_usb_endpoint *sender,
1090 const struct urb *urb)
1091{
1092 int shift;
1093 unsigned int f;
1094 unsigned long flags;
1095
1096 snd_BUG_ON(ep == sender);
1097
1098
1099
1100
1101
1102
1103
1104 if (snd_usb_endpoint_implicit_feedback_sink(ep) &&
1105 ep->use_count != 0) {
1106
1107
1108 int i, bytes = 0;
1109 struct snd_urb_ctx *in_ctx;
1110 struct snd_usb_packet_info *out_packet;
1111
1112 in_ctx = urb->context;
1113
1114
1115 for (i = 0; i < in_ctx->packets; i++)
1116 if (urb->iso_frame_desc[i].status == 0)
1117 bytes += urb->iso_frame_desc[i].actual_length;
1118
1119
1120
1121
1122
1123 if (bytes == 0)
1124 return;
1125
1126 spin_lock_irqsave(&ep->lock, flags);
1127 out_packet = ep->next_packet + ep->next_packet_write_pos;
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139 out_packet->packets = in_ctx->packets;
1140 for (i = 0; i < in_ctx->packets; i++) {
1141 if (urb->iso_frame_desc[i].status == 0)
1142 out_packet->packet_size[i] =
1143 urb->iso_frame_desc[i].actual_length / sender->stride;
1144 else
1145 out_packet->packet_size[i] = 0;
1146 }
1147
1148 ep->next_packet_write_pos++;
1149 ep->next_packet_write_pos %= MAX_URBS;
1150 spin_unlock_irqrestore(&ep->lock, flags);
1151 queue_pending_output_urbs(ep);
1152
1153 return;
1154 }
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171 if (urb->iso_frame_desc[0].status != 0 ||
1172 urb->iso_frame_desc[0].actual_length < 3)
1173 return;
1174
1175 f = le32_to_cpup(urb->transfer_buffer);
1176 if (urb->iso_frame_desc[0].actual_length == 3)
1177 f &= 0x00ffffff;
1178 else
1179 f &= 0x0fffffff;
1180
1181 if (f == 0)
1182 return;
1183
1184 if (unlikely(sender->tenor_fb_quirk)) {
1185
1186
1187
1188
1189
1190 if (f < ep->freqn - 0x8000)
1191 f += 0xf000;
1192 else if (f > ep->freqn + 0x8000)
1193 f -= 0xf000;
1194 } else if (unlikely(ep->freqshift == INT_MIN)) {
1195
1196
1197
1198
1199
1200
1201 shift = 0;
1202 while (f < ep->freqn - ep->freqn / 4) {
1203 f <<= 1;
1204 shift++;
1205 }
1206 while (f > ep->freqn + ep->freqn / 2) {
1207 f >>= 1;
1208 shift--;
1209 }
1210 ep->freqshift = shift;
1211 } else if (ep->freqshift >= 0)
1212 f <<= ep->freqshift;
1213 else
1214 f >>= -ep->freqshift;
1215
1216 if (likely(f >= ep->freqn - ep->freqn / 8 && f <= ep->freqmax)) {
1217
1218
1219
1220
1221 spin_lock_irqsave(&ep->lock, flags);
1222 ep->freqm = f;
1223 spin_unlock_irqrestore(&ep->lock, flags);
1224 } else {
1225
1226
1227
1228
1229 ep->freqshift = INT_MIN;
1230 }
1231}
1232
1233