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5#include <linux/gfp.h>
6#include <linux/init.h>
7#include <linux/ratelimit.h>
8#include <linux/usb.h>
9#include <linux/usb/audio.h>
10#include <linux/slab.h>
11
12#include <sound/core.h>
13#include <sound/pcm.h>
14#include <sound/pcm_params.h>
15
16#include "usbaudio.h"
17#include "helper.h"
18#include "card.h"
19#include "endpoint.h"
20#include "pcm.h"
21#include "quirks.h"
22
23#define EP_FLAG_RUNNING 1
24#define EP_FLAG_STOPPING 2
25
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56
57static inline unsigned get_usb_full_speed_rate(unsigned int rate)
58{
59 return ((rate << 13) + 62) / 125;
60}
61
62
63
64
65
66static inline unsigned get_usb_high_speed_rate(unsigned int rate)
67{
68 return ((rate << 10) + 62) / 125;
69}
70
71
72
73
74static void release_urb_ctx(struct snd_urb_ctx *u)
75{
76 if (u->buffer_size)
77 usb_free_coherent(u->ep->chip->dev, u->buffer_size,
78 u->urb->transfer_buffer,
79 u->urb->transfer_dma);
80 usb_free_urb(u->urb);
81 u->urb = NULL;
82}
83
84static const char *usb_error_string(int err)
85{
86 switch (err) {
87 case -ENODEV:
88 return "no device";
89 case -ENOENT:
90 return "endpoint not enabled";
91 case -EPIPE:
92 return "endpoint stalled";
93 case -ENOSPC:
94 return "not enough bandwidth";
95 case -ESHUTDOWN:
96 return "device disabled";
97 case -EHOSTUNREACH:
98 return "device suspended";
99 case -EINVAL:
100 case -EAGAIN:
101 case -EFBIG:
102 case -EMSGSIZE:
103 return "internal error";
104 default:
105 return "unknown error";
106 }
107}
108
109
110
111
112
113
114
115
116
117int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep)
118{
119 return ep->sync_master &&
120 ep->sync_master->type == SND_USB_ENDPOINT_TYPE_DATA &&
121 ep->type == SND_USB_ENDPOINT_TYPE_DATA &&
122 usb_pipeout(ep->pipe);
123}
124
125
126
127
128
129
130
131
132int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep)
133{
134 unsigned long flags;
135 int ret;
136
137 if (ep->fill_max)
138 return ep->maxframesize;
139
140 spin_lock_irqsave(&ep->lock, flags);
141 ep->phase = (ep->phase & 0xffff)
142 + (ep->freqm << ep->datainterval);
143 ret = min(ep->phase >> 16, ep->maxframesize);
144 spin_unlock_irqrestore(&ep->lock, flags);
145
146 return ret;
147}
148
149
150
151
152
153
154int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep)
155{
156 int ret;
157
158 if (ep->fill_max)
159 return ep->maxframesize;
160
161 ep->sample_accum += ep->sample_rem;
162 if (ep->sample_accum >= ep->pps) {
163 ep->sample_accum -= ep->pps;
164 ret = ep->packsize[1];
165 } else {
166 ret = ep->packsize[0];
167 }
168
169 return ret;
170}
171
172static void retire_outbound_urb(struct snd_usb_endpoint *ep,
173 struct snd_urb_ctx *urb_ctx)
174{
175 if (ep->retire_data_urb)
176 ep->retire_data_urb(ep->data_subs, urb_ctx->urb);
177}
178
179static void retire_inbound_urb(struct snd_usb_endpoint *ep,
180 struct snd_urb_ctx *urb_ctx)
181{
182 struct urb *urb = urb_ctx->urb;
183
184 if (unlikely(ep->skip_packets > 0)) {
185 ep->skip_packets--;
186 return;
187 }
188
189 if (ep->sync_slave)
190 snd_usb_handle_sync_urb(ep->sync_slave, ep, urb);
191
192 if (ep->retire_data_urb)
193 ep->retire_data_urb(ep->data_subs, urb);
194}
195
196static void prepare_silent_urb(struct snd_usb_endpoint *ep,
197 struct snd_urb_ctx *ctx)
198{
199 struct urb *urb = ctx->urb;
200 unsigned int offs = 0;
201 unsigned int extra = 0;
202 __le32 packet_length;
203 int i;
204
205
206 if (ep->chip->tx_length_quirk)
207 extra = sizeof(packet_length);
208
209 for (i = 0; i < ctx->packets; ++i) {
210 unsigned int offset;
211 unsigned int length;
212 int counts;
213
214 if (ctx->packet_size[i])
215 counts = ctx->packet_size[i];
216 else if (ep->sync_master)
217 counts = snd_usb_endpoint_slave_next_packet_size(ep);
218 else
219 counts = snd_usb_endpoint_next_packet_size(ep);
220
221 length = counts * ep->stride;
222 offset = offs * ep->stride + extra * i;
223 urb->iso_frame_desc[i].offset = offset;
224 urb->iso_frame_desc[i].length = length + extra;
225 if (extra) {
226 packet_length = cpu_to_le32(length);
227 memcpy(urb->transfer_buffer + offset,
228 &packet_length, sizeof(packet_length));
229 }
230 memset(urb->transfer_buffer + offset + extra,
231 ep->silence_value, length);
232 offs += counts;
233 }
234
235 urb->number_of_packets = ctx->packets;
236 urb->transfer_buffer_length = offs * ep->stride + ctx->packets * extra;
237}
238
239
240
241
242static void prepare_outbound_urb(struct snd_usb_endpoint *ep,
243 struct snd_urb_ctx *ctx)
244{
245 struct urb *urb = ctx->urb;
246 unsigned char *cp = urb->transfer_buffer;
247
248 urb->dev = ep->chip->dev;
249
250 switch (ep->type) {
251 case SND_USB_ENDPOINT_TYPE_DATA:
252 if (ep->prepare_data_urb) {
253 ep->prepare_data_urb(ep->data_subs, urb);
254 } else {
255
256 prepare_silent_urb(ep, ctx);
257 }
258 break;
259
260 case SND_USB_ENDPOINT_TYPE_SYNC:
261 if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) {
262
263
264
265
266 urb->iso_frame_desc[0].length = 4;
267 urb->iso_frame_desc[0].offset = 0;
268 cp[0] = ep->freqn;
269 cp[1] = ep->freqn >> 8;
270 cp[2] = ep->freqn >> 16;
271 cp[3] = ep->freqn >> 24;
272 } else {
273
274
275
276
277 urb->iso_frame_desc[0].length = 3;
278 urb->iso_frame_desc[0].offset = 0;
279 cp[0] = ep->freqn >> 2;
280 cp[1] = ep->freqn >> 10;
281 cp[2] = ep->freqn >> 18;
282 }
283
284 break;
285 }
286}
287
288
289
290
291static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep,
292 struct snd_urb_ctx *urb_ctx)
293{
294 int i, offs;
295 struct urb *urb = urb_ctx->urb;
296
297 urb->dev = ep->chip->dev;
298
299 switch (ep->type) {
300 case SND_USB_ENDPOINT_TYPE_DATA:
301 offs = 0;
302 for (i = 0; i < urb_ctx->packets; i++) {
303 urb->iso_frame_desc[i].offset = offs;
304 urb->iso_frame_desc[i].length = ep->curpacksize;
305 offs += ep->curpacksize;
306 }
307
308 urb->transfer_buffer_length = offs;
309 urb->number_of_packets = urb_ctx->packets;
310 break;
311
312 case SND_USB_ENDPOINT_TYPE_SYNC:
313 urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize);
314 urb->iso_frame_desc[0].offset = 0;
315 break;
316 }
317}
318
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331
332
333static void queue_pending_output_urbs(struct snd_usb_endpoint *ep)
334{
335 while (test_bit(EP_FLAG_RUNNING, &ep->flags)) {
336
337 unsigned long flags;
338 struct snd_usb_packet_info *packet;
339 struct snd_urb_ctx *ctx = NULL;
340 int err, i;
341
342 spin_lock_irqsave(&ep->lock, flags);
343 if (ep->next_packet_read_pos != ep->next_packet_write_pos) {
344 packet = ep->next_packet + ep->next_packet_read_pos;
345 ep->next_packet_read_pos++;
346 ep->next_packet_read_pos %= MAX_URBS;
347
348
349 if (!list_empty(&ep->ready_playback_urbs)) {
350 ctx = list_first_entry(&ep->ready_playback_urbs,
351 struct snd_urb_ctx, ready_list);
352 list_del_init(&ctx->ready_list);
353 }
354 }
355 spin_unlock_irqrestore(&ep->lock, flags);
356
357 if (ctx == NULL)
358 return;
359
360
361 for (i = 0; i < packet->packets; i++)
362 ctx->packet_size[i] = packet->packet_size[i];
363
364
365 prepare_outbound_urb(ep, ctx);
366
367 err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
368 if (err < 0)
369 usb_audio_err(ep->chip,
370 "Unable to submit urb #%d: %d (urb %p)\n",
371 ctx->index, err, ctx->urb);
372 else
373 set_bit(ctx->index, &ep->active_mask);
374 }
375}
376
377
378
379
380static void snd_complete_urb(struct urb *urb)
381{
382 struct snd_urb_ctx *ctx = urb->context;
383 struct snd_usb_endpoint *ep = ctx->ep;
384 struct snd_pcm_substream *substream;
385 unsigned long flags;
386 int err;
387
388 if (unlikely(urb->status == -ENOENT ||
389 urb->status == -ENODEV ||
390 urb->status == -ECONNRESET ||
391 urb->status == -ESHUTDOWN))
392 goto exit_clear;
393
394 if (unlikely(atomic_read(&ep->chip->shutdown)))
395 goto exit_clear;
396
397 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
398 goto exit_clear;
399
400 if (usb_pipeout(ep->pipe)) {
401 retire_outbound_urb(ep, ctx);
402
403 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
404 goto exit_clear;
405
406 if (snd_usb_endpoint_implicit_feedback_sink(ep)) {
407 spin_lock_irqsave(&ep->lock, flags);
408 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
409 spin_unlock_irqrestore(&ep->lock, flags);
410 queue_pending_output_urbs(ep);
411
412 goto exit_clear;
413 }
414
415 prepare_outbound_urb(ep, ctx);
416
417 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
418 goto exit_clear;
419 } else {
420 retire_inbound_urb(ep, ctx);
421
422 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
423 goto exit_clear;
424
425 prepare_inbound_urb(ep, ctx);
426 }
427
428 err = usb_submit_urb(urb, GFP_ATOMIC);
429 if (err == 0)
430 return;
431
432 usb_audio_err(ep->chip, "cannot submit urb (err = %d)\n", err);
433 if (ep->data_subs && ep->data_subs->pcm_substream) {
434 substream = ep->data_subs->pcm_substream;
435 snd_pcm_stop_xrun(substream);
436 }
437
438exit_clear:
439 clear_bit(ctx->index, &ep->active_mask);
440}
441
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460
461struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
462 struct usb_host_interface *alts,
463 int ep_num, int direction, int type)
464{
465 struct snd_usb_endpoint *ep;
466 int is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK;
467
468 if (WARN_ON(!alts))
469 return NULL;
470
471 mutex_lock(&chip->mutex);
472
473 list_for_each_entry(ep, &chip->ep_list, list) {
474 if (ep->ep_num == ep_num &&
475 ep->iface == alts->desc.bInterfaceNumber &&
476 ep->altsetting == alts->desc.bAlternateSetting) {
477 usb_audio_dbg(ep->chip,
478 "Re-using EP %x in iface %d,%d @%p\n",
479 ep_num, ep->iface, ep->altsetting, ep);
480 goto __exit_unlock;
481 }
482 }
483
484 usb_audio_dbg(chip, "Creating new %s %s endpoint #%x\n",
485 is_playback ? "playback" : "capture",
486 type == SND_USB_ENDPOINT_TYPE_DATA ? "data" : "sync",
487 ep_num);
488
489 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
490 if (!ep)
491 goto __exit_unlock;
492
493 ep->chip = chip;
494 spin_lock_init(&ep->lock);
495 ep->type = type;
496 ep->ep_num = ep_num;
497 ep->iface = alts->desc.bInterfaceNumber;
498 ep->altsetting = alts->desc.bAlternateSetting;
499 INIT_LIST_HEAD(&ep->ready_playback_urbs);
500 ep_num &= USB_ENDPOINT_NUMBER_MASK;
501
502 if (is_playback)
503 ep->pipe = usb_sndisocpipe(chip->dev, ep_num);
504 else
505 ep->pipe = usb_rcvisocpipe(chip->dev, ep_num);
506
507 if (type == SND_USB_ENDPOINT_TYPE_SYNC) {
508 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
509 get_endpoint(alts, 1)->bRefresh >= 1 &&
510 get_endpoint(alts, 1)->bRefresh <= 9)
511 ep->syncinterval = get_endpoint(alts, 1)->bRefresh;
512 else if (snd_usb_get_speed(chip->dev) == USB_SPEED_FULL)
513 ep->syncinterval = 1;
514 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
515 get_endpoint(alts, 1)->bInterval <= 16)
516 ep->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
517 else
518 ep->syncinterval = 3;
519
520 ep->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
521 }
522
523 list_add_tail(&ep->list, &chip->ep_list);
524
525 ep->is_implicit_feedback = 0;
526
527__exit_unlock:
528 mutex_unlock(&chip->mutex);
529
530 return ep;
531}
532
533
534
535
536static int wait_clear_urbs(struct snd_usb_endpoint *ep)
537{
538 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
539 int alive;
540
541 do {
542 alive = bitmap_weight(&ep->active_mask, ep->nurbs);
543 if (!alive)
544 break;
545
546 schedule_timeout_uninterruptible(1);
547 } while (time_before(jiffies, end_time));
548
549 if (alive)
550 usb_audio_err(ep->chip,
551 "timeout: still %d active urbs on EP #%x\n",
552 alive, ep->ep_num);
553 clear_bit(EP_FLAG_STOPPING, &ep->flags);
554
555 ep->data_subs = NULL;
556 ep->sync_slave = NULL;
557 ep->retire_data_urb = NULL;
558 ep->prepare_data_urb = NULL;
559
560 return 0;
561}
562
563
564
565
566void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep)
567{
568 if (ep && test_bit(EP_FLAG_STOPPING, &ep->flags))
569 wait_clear_urbs(ep);
570}
571
572
573
574
575static int deactivate_urbs(struct snd_usb_endpoint *ep, bool force)
576{
577 unsigned int i;
578
579 if (!force && atomic_read(&ep->chip->shutdown))
580 return -EBADFD;
581
582 clear_bit(EP_FLAG_RUNNING, &ep->flags);
583
584 INIT_LIST_HEAD(&ep->ready_playback_urbs);
585 ep->next_packet_read_pos = 0;
586 ep->next_packet_write_pos = 0;
587
588 for (i = 0; i < ep->nurbs; i++) {
589 if (test_bit(i, &ep->active_mask)) {
590 if (!test_and_set_bit(i, &ep->unlink_mask)) {
591 struct urb *u = ep->urb[i].urb;
592 usb_unlink_urb(u);
593 }
594 }
595 }
596
597 return 0;
598}
599
600
601
602
603static void release_urbs(struct snd_usb_endpoint *ep, int force)
604{
605 int i;
606
607
608 ep->retire_data_urb = NULL;
609 ep->prepare_data_urb = NULL;
610
611
612 deactivate_urbs(ep, force);
613 wait_clear_urbs(ep);
614
615 for (i = 0; i < ep->nurbs; i++)
616 release_urb_ctx(&ep->urb[i]);
617
618 usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
619 ep->syncbuf, ep->sync_dma);
620
621 ep->syncbuf = NULL;
622 ep->nurbs = 0;
623}
624
625
626
627
628static bool check_ep_params(struct snd_usb_endpoint *ep,
629 snd_pcm_format_t pcm_format,
630 unsigned int channels,
631 unsigned int period_bytes,
632 unsigned int frames_per_period,
633 unsigned int periods_per_buffer,
634 struct audioformat *fmt,
635 struct snd_usb_endpoint *sync_ep)
636{
637 unsigned int maxsize, minsize, packs_per_ms, max_packs_per_urb;
638 unsigned int max_packs_per_period, urbs_per_period, urb_packs;
639 unsigned int max_urbs;
640 int frame_bits = snd_pcm_format_physical_width(pcm_format) * channels;
641 int tx_length_quirk = (ep->chip->tx_length_quirk &&
642 usb_pipeout(ep->pipe));
643 bool ret = 1;
644
645 if (pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && fmt->dsd_dop) {
646
647
648
649
650
651 frame_bits += channels << 3;
652 }
653
654 ret = ret && (ep->datainterval == fmt->datainterval);
655 ret = ret && (ep->stride == frame_bits >> 3);
656
657 switch (pcm_format) {
658 case SNDRV_PCM_FORMAT_U8:
659 ret = ret && (ep->silence_value == 0x80);
660 break;
661 case SNDRV_PCM_FORMAT_DSD_U8:
662 case SNDRV_PCM_FORMAT_DSD_U16_LE:
663 case SNDRV_PCM_FORMAT_DSD_U32_LE:
664 case SNDRV_PCM_FORMAT_DSD_U16_BE:
665 case SNDRV_PCM_FORMAT_DSD_U32_BE:
666 ret = ret && (ep->silence_value == 0x69);
667 break;
668 default:
669 ret = ret && (ep->silence_value == 0);
670 }
671
672
673 ret = ret && (ep->freqmax == ep->freqn + (ep->freqn >> 1));
674
675
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681
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684
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686
687
688
689 maxsize = (((ep->freqmax << ep->datainterval) + 0xffff) >> 16) *
690 (frame_bits >> 3);
691 if (tx_length_quirk)
692 maxsize += sizeof(__le32);
693
694 if (ep->maxpacksize && ep->maxpacksize < maxsize) {
695
696 unsigned int data_maxsize = maxsize = ep->maxpacksize;
697
698 if (tx_length_quirk)
699
700 data_maxsize -= sizeof(__le32);
701 ret = ret && (ep->freqmax == (data_maxsize / (frame_bits >> 3))
702 << (16 - ep->datainterval));
703 }
704
705 if (ep->fill_max)
706 ret = ret && (ep->curpacksize == ep->maxpacksize);
707 else
708 ret = ret && (ep->curpacksize == maxsize);
709
710 if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL) {
711 packs_per_ms = 8 >> ep->datainterval;
712 max_packs_per_urb = MAX_PACKS_HS;
713 } else {
714 packs_per_ms = 1;
715 max_packs_per_urb = MAX_PACKS;
716 }
717 if (sync_ep && !snd_usb_endpoint_implicit_feedback_sink(ep))
718 max_packs_per_urb = min(max_packs_per_urb,
719 1U << sync_ep->syncinterval);
720 max_packs_per_urb = max(1u, max_packs_per_urb >> ep->datainterval);
721
722
723
724
725
726
727
728
729
730 if (usb_pipein(ep->pipe) ||
731 snd_usb_endpoint_implicit_feedback_sink(ep)) {
732
733 urb_packs = packs_per_ms;
734
735
736
737
738
739
740 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_WIRELESS) {
741 int interval = ep->datainterval;
742
743 while (interval < 5) {
744 urb_packs <<= 1;
745 ++interval;
746 }
747 }
748
749 urb_packs = min(max_packs_per_urb, urb_packs);
750 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
751 urb_packs >>= 1;
752 ret = ret && (ep->nurbs == MAX_URBS);
753
754
755
756
757
758
759
760 } else {
761
762 minsize = (ep->freqn >> (16 - ep->datainterval)) *
763 (frame_bits >> 3);
764
765 if (sync_ep)
766 minsize -= minsize >> 3;
767 minsize = max(minsize, 1u);
768
769
770 max_packs_per_period = DIV_ROUND_UP(period_bytes, minsize);
771
772
773 urbs_per_period = DIV_ROUND_UP(max_packs_per_period,
774 max_packs_per_urb);
775
776 urb_packs = DIV_ROUND_UP(max_packs_per_period, urbs_per_period);
777
778
779 ret = ret && (ep->max_urb_frames ==
780 DIV_ROUND_UP(frames_per_period, urbs_per_period));
781
782
783 max_urbs = min((unsigned) MAX_URBS,
784 MAX_QUEUE * packs_per_ms / urb_packs);
785 ret = ret && (ep->nurbs == min(max_urbs,
786 urbs_per_period * periods_per_buffer));
787 }
788
789 ret = ret && (ep->datainterval == fmt->datainterval);
790 ret = ret && (ep->maxpacksize == fmt->maxpacksize);
791 ret = ret &&
792 (ep->fill_max == !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX));
793
794 return ret;
795}
796
797
798
799
800static int data_ep_set_params(struct snd_usb_endpoint *ep,
801 snd_pcm_format_t pcm_format,
802 unsigned int channels,
803 unsigned int period_bytes,
804 unsigned int frames_per_period,
805 unsigned int periods_per_buffer,
806 struct audioformat *fmt,
807 struct snd_usb_endpoint *sync_ep)
808{
809 unsigned int maxsize, minsize, packs_per_ms, max_packs_per_urb;
810 unsigned int max_packs_per_period, urbs_per_period, urb_packs;
811 unsigned int max_urbs, i;
812 int frame_bits = snd_pcm_format_physical_width(pcm_format) * channels;
813 int tx_length_quirk = (ep->chip->tx_length_quirk &&
814 usb_pipeout(ep->pipe));
815
816 if (pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && fmt->dsd_dop) {
817
818
819
820
821
822 frame_bits += channels << 3;
823 }
824
825 ep->datainterval = fmt->datainterval;
826 ep->stride = frame_bits >> 3;
827
828 switch (pcm_format) {
829 case SNDRV_PCM_FORMAT_U8:
830 ep->silence_value = 0x80;
831 break;
832 case SNDRV_PCM_FORMAT_DSD_U8:
833 case SNDRV_PCM_FORMAT_DSD_U16_LE:
834 case SNDRV_PCM_FORMAT_DSD_U32_LE:
835 case SNDRV_PCM_FORMAT_DSD_U16_BE:
836 case SNDRV_PCM_FORMAT_DSD_U32_BE:
837 ep->silence_value = 0x69;
838 break;
839 default:
840 ep->silence_value = 0;
841 }
842
843
844 ep->freqmax = ep->freqn + (ep->freqn >> 1);
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858
859
860 maxsize = (((ep->freqmax << ep->datainterval) + 0xffff) >> 16) *
861 (frame_bits >> 3);
862 if (tx_length_quirk)
863 maxsize += sizeof(__le32);
864
865 if (ep->maxpacksize && ep->maxpacksize < maxsize) {
866
867 unsigned int data_maxsize = maxsize = ep->maxpacksize;
868
869 if (tx_length_quirk)
870
871 data_maxsize -= sizeof(__le32);
872 ep->freqmax = (data_maxsize / (frame_bits >> 3))
873 << (16 - ep->datainterval);
874 }
875
876 if (ep->fill_max)
877 ep->curpacksize = ep->maxpacksize;
878 else
879 ep->curpacksize = maxsize;
880
881 if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL) {
882 packs_per_ms = 8 >> ep->datainterval;
883 max_packs_per_urb = MAX_PACKS_HS;
884 } else {
885 packs_per_ms = 1;
886 max_packs_per_urb = MAX_PACKS;
887 }
888 if (sync_ep && !snd_usb_endpoint_implicit_feedback_sink(ep))
889 max_packs_per_urb = min(max_packs_per_urb,
890 1U << sync_ep->syncinterval);
891 max_packs_per_urb = max(1u, max_packs_per_urb >> ep->datainterval);
892
893
894
895
896
897
898
899
900
901 if (usb_pipein(ep->pipe) ||
902 snd_usb_endpoint_implicit_feedback_sink(ep)) {
903
904 urb_packs = packs_per_ms;
905
906
907
908
909
910
911 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_WIRELESS) {
912 int interval = ep->datainterval;
913 while (interval < 5) {
914 urb_packs <<= 1;
915 ++interval;
916 }
917 }
918
919 urb_packs = min(max_packs_per_urb, urb_packs);
920 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
921 urb_packs >>= 1;
922 ep->nurbs = MAX_URBS;
923
924
925
926
927
928
929
930 } else {
931
932 minsize = (ep->freqn >> (16 - ep->datainterval)) *
933 (frame_bits >> 3);
934
935 if (sync_ep)
936 minsize -= minsize >> 3;
937 minsize = max(minsize, 1u);
938
939
940 max_packs_per_period = DIV_ROUND_UP(period_bytes, minsize);
941
942
943 urbs_per_period = DIV_ROUND_UP(max_packs_per_period,
944 max_packs_per_urb);
945
946 urb_packs = DIV_ROUND_UP(max_packs_per_period, urbs_per_period);
947
948
949 ep->max_urb_frames = DIV_ROUND_UP(frames_per_period,
950 urbs_per_period);
951
952
953 max_urbs = min((unsigned) MAX_URBS,
954 MAX_QUEUE * packs_per_ms / urb_packs);
955 ep->nurbs = min(max_urbs, urbs_per_period * periods_per_buffer);
956 }
957
958
959 for (i = 0; i < ep->nurbs; i++) {
960 struct snd_urb_ctx *u = &ep->urb[i];
961 u->index = i;
962 u->ep = ep;
963 u->packets = urb_packs;
964 u->buffer_size = maxsize * u->packets;
965
966 if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
967 u->packets++;
968 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
969 if (!u->urb)
970 goto out_of_memory;
971
972 u->urb->transfer_buffer =
973 usb_alloc_coherent(ep->chip->dev, u->buffer_size,
974 GFP_KERNEL, &u->urb->transfer_dma);
975 if (!u->urb->transfer_buffer)
976 goto out_of_memory;
977 u->urb->pipe = ep->pipe;
978 u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
979 u->urb->interval = 1 << ep->datainterval;
980 u->urb->context = u;
981 u->urb->complete = snd_complete_urb;
982 INIT_LIST_HEAD(&u->ready_list);
983 }
984
985 return 0;
986
987out_of_memory:
988 release_urbs(ep, 0);
989 return -ENOMEM;
990}
991
992
993
994
995static int sync_ep_set_params(struct snd_usb_endpoint *ep)
996{
997 int i;
998
999 ep->syncbuf = usb_alloc_coherent(ep->chip->dev, SYNC_URBS * 4,
1000 GFP_KERNEL, &ep->sync_dma);
1001 if (!ep->syncbuf)
1002 return -ENOMEM;
1003
1004 for (i = 0; i < SYNC_URBS; i++) {
1005 struct snd_urb_ctx *u = &ep->urb[i];
1006 u->index = i;
1007 u->ep = ep;
1008 u->packets = 1;
1009 u->urb = usb_alloc_urb(1, GFP_KERNEL);
1010 if (!u->urb)
1011 goto out_of_memory;
1012 u->urb->transfer_buffer = ep->syncbuf + i * 4;
1013 u->urb->transfer_dma = ep->sync_dma + i * 4;
1014 u->urb->transfer_buffer_length = 4;
1015 u->urb->pipe = ep->pipe;
1016 u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1017 u->urb->number_of_packets = 1;
1018 u->urb->interval = 1 << ep->syncinterval;
1019 u->urb->context = u;
1020 u->urb->complete = snd_complete_urb;
1021 }
1022
1023 ep->nurbs = SYNC_URBS;
1024
1025 return 0;
1026
1027out_of_memory:
1028 release_urbs(ep, 0);
1029 return -ENOMEM;
1030}
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
1050 snd_pcm_format_t pcm_format,
1051 unsigned int channels,
1052 unsigned int period_bytes,
1053 unsigned int period_frames,
1054 unsigned int buffer_periods,
1055 unsigned int rate,
1056 struct audioformat *fmt,
1057 struct snd_usb_endpoint *sync_ep)
1058{
1059 int err;
1060
1061 if (ep->use_count != 0) {
1062 bool check = ep->is_implicit_feedback &&
1063 check_ep_params(ep, pcm_format,
1064 channels, period_bytes,
1065 period_frames, buffer_periods,
1066 fmt, sync_ep);
1067
1068 if (!check) {
1069 usb_audio_warn(ep->chip,
1070 "Unable to change format on ep #%x: already in use\n",
1071 ep->ep_num);
1072 return -EBUSY;
1073 }
1074
1075 usb_audio_dbg(ep->chip,
1076 "Ep #%x already in use as implicit feedback but format not changed\n",
1077 ep->ep_num);
1078 return 0;
1079 }
1080
1081
1082 release_urbs(ep, 0);
1083
1084 ep->datainterval = fmt->datainterval;
1085 ep->maxpacksize = fmt->maxpacksize;
1086 ep->fill_max = !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX);
1087
1088 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL) {
1089 ep->freqn = get_usb_full_speed_rate(rate);
1090 ep->pps = 1000 >> ep->datainterval;
1091 } else {
1092 ep->freqn = get_usb_high_speed_rate(rate);
1093 ep->pps = 8000 >> ep->datainterval;
1094 }
1095
1096 ep->sample_rem = rate % ep->pps;
1097 ep->packsize[0] = rate / ep->pps;
1098 ep->packsize[1] = (rate + (ep->pps - 1)) / ep->pps;
1099
1100
1101 ep->freqm = ep->freqn;
1102 ep->freqshift = INT_MIN;
1103
1104 ep->phase = 0;
1105
1106 switch (ep->type) {
1107 case SND_USB_ENDPOINT_TYPE_DATA:
1108 err = data_ep_set_params(ep, pcm_format, channels,
1109 period_bytes, period_frames,
1110 buffer_periods, fmt, sync_ep);
1111 break;
1112 case SND_USB_ENDPOINT_TYPE_SYNC:
1113 err = sync_ep_set_params(ep);
1114 break;
1115 default:
1116 err = -EINVAL;
1117 }
1118
1119 usb_audio_dbg(ep->chip,
1120 "Setting params for ep #%x (type %d, %d urbs), ret=%d\n",
1121 ep->ep_num, ep->type, ep->nurbs, err);
1122
1123 return err;
1124}
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139int snd_usb_endpoint_start(struct snd_usb_endpoint *ep)
1140{
1141 int err;
1142 unsigned int i;
1143
1144 if (atomic_read(&ep->chip->shutdown))
1145 return -EBADFD;
1146
1147
1148 if (++ep->use_count != 1)
1149 return 0;
1150
1151
1152 deactivate_urbs(ep, false);
1153
1154 ep->active_mask = 0;
1155 ep->unlink_mask = 0;
1156 ep->phase = 0;
1157 ep->sample_accum = 0;
1158
1159 snd_usb_endpoint_start_quirk(ep);
1160
1161
1162
1163
1164
1165
1166
1167
1168 set_bit(EP_FLAG_RUNNING, &ep->flags);
1169
1170 if (snd_usb_endpoint_implicit_feedback_sink(ep)) {
1171 for (i = 0; i < ep->nurbs; i++) {
1172 struct snd_urb_ctx *ctx = ep->urb + i;
1173 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
1174 }
1175
1176 return 0;
1177 }
1178
1179 for (i = 0; i < ep->nurbs; i++) {
1180 struct urb *urb = ep->urb[i].urb;
1181
1182 if (snd_BUG_ON(!urb))
1183 goto __error;
1184
1185 if (usb_pipeout(ep->pipe)) {
1186 prepare_outbound_urb(ep, urb->context);
1187 } else {
1188 prepare_inbound_urb(ep, urb->context);
1189 }
1190
1191 err = usb_submit_urb(urb, GFP_ATOMIC);
1192 if (err < 0) {
1193 usb_audio_err(ep->chip,
1194 "cannot submit urb %d, error %d: %s\n",
1195 i, err, usb_error_string(err));
1196 goto __error;
1197 }
1198 set_bit(i, &ep->active_mask);
1199 }
1200
1201 return 0;
1202
1203__error:
1204 clear_bit(EP_FLAG_RUNNING, &ep->flags);
1205 ep->use_count--;
1206 deactivate_urbs(ep, false);
1207 return -EPIPE;
1208}
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep)
1225{
1226 if (!ep)
1227 return;
1228
1229 if (snd_BUG_ON(ep->use_count == 0))
1230 return;
1231
1232 if (--ep->use_count == 0) {
1233 deactivate_urbs(ep, false);
1234 set_bit(EP_FLAG_STOPPING, &ep->flags);
1235 }
1236}
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep)
1249{
1250 if (!ep)
1251 return;
1252
1253 if (ep->use_count != 0)
1254 return;
1255
1256 deactivate_urbs(ep, true);
1257 wait_clear_urbs(ep);
1258}
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268void snd_usb_endpoint_release(struct snd_usb_endpoint *ep)
1269{
1270 release_urbs(ep, 1);
1271}
1272
1273
1274
1275
1276
1277
1278
1279
1280void snd_usb_endpoint_free(struct snd_usb_endpoint *ep)
1281{
1282 kfree(ep);
1283}
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
1296 struct snd_usb_endpoint *sender,
1297 const struct urb *urb)
1298{
1299 int shift;
1300 unsigned int f;
1301 unsigned long flags;
1302
1303 snd_BUG_ON(ep == sender);
1304
1305
1306
1307
1308
1309
1310
1311 if (snd_usb_endpoint_implicit_feedback_sink(ep) &&
1312 ep->use_count != 0) {
1313
1314
1315 int i, bytes = 0;
1316 struct snd_urb_ctx *in_ctx;
1317 struct snd_usb_packet_info *out_packet;
1318
1319 in_ctx = urb->context;
1320
1321
1322 for (i = 0; i < in_ctx->packets; i++)
1323 if (urb->iso_frame_desc[i].status == 0)
1324 bytes += urb->iso_frame_desc[i].actual_length;
1325
1326
1327
1328
1329
1330 if (bytes == 0)
1331 return;
1332
1333 spin_lock_irqsave(&ep->lock, flags);
1334 out_packet = ep->next_packet + ep->next_packet_write_pos;
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346 out_packet->packets = in_ctx->packets;
1347 for (i = 0; i < in_ctx->packets; i++) {
1348 if (urb->iso_frame_desc[i].status == 0)
1349 out_packet->packet_size[i] =
1350 urb->iso_frame_desc[i].actual_length / sender->stride;
1351 else
1352 out_packet->packet_size[i] = 0;
1353 }
1354
1355 ep->next_packet_write_pos++;
1356 ep->next_packet_write_pos %= MAX_URBS;
1357 spin_unlock_irqrestore(&ep->lock, flags);
1358 queue_pending_output_urbs(ep);
1359
1360 return;
1361 }
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378 if (urb->iso_frame_desc[0].status != 0 ||
1379 urb->iso_frame_desc[0].actual_length < 3)
1380 return;
1381
1382 f = le32_to_cpup(urb->transfer_buffer);
1383 if (urb->iso_frame_desc[0].actual_length == 3)
1384 f &= 0x00ffffff;
1385 else
1386 f &= 0x0fffffff;
1387
1388 if (f == 0)
1389 return;
1390
1391 if (unlikely(sender->tenor_fb_quirk)) {
1392
1393
1394
1395
1396
1397 if (f < ep->freqn - 0x8000)
1398 f += 0xf000;
1399 else if (f > ep->freqn + 0x8000)
1400 f -= 0xf000;
1401 } else if (unlikely(ep->freqshift == INT_MIN)) {
1402
1403
1404
1405
1406
1407
1408 shift = 0;
1409 while (f < ep->freqn - ep->freqn / 4) {
1410 f <<= 1;
1411 shift++;
1412 }
1413 while (f > ep->freqn + ep->freqn / 2) {
1414 f >>= 1;
1415 shift--;
1416 }
1417 ep->freqshift = shift;
1418 } else if (ep->freqshift >= 0)
1419 f <<= ep->freqshift;
1420 else
1421 f >>= -ep->freqshift;
1422
1423 if (likely(f >= ep->freqn - ep->freqn / 8 && f <= ep->freqmax)) {
1424
1425
1426
1427
1428 spin_lock_irqsave(&ep->lock, flags);
1429 ep->freqm = f;
1430 spin_unlock_irqrestore(&ep->lock, flags);
1431 } else {
1432
1433
1434
1435
1436 ep->freqshift = INT_MIN;
1437 }
1438}
1439
1440