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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
186
187
188
189static void prepare_outbound_urb(struct snd_usb_endpoint *ep,
190 struct snd_urb_ctx *ctx)
191{
192 int i;
193 struct urb *urb = ctx->urb;
194 unsigned char *cp = urb->transfer_buffer;
195
196 urb->dev = ep->chip->dev;
197
198 switch (ep->type) {
199 case SND_USB_ENDPOINT_TYPE_DATA:
200 if (ep->prepare_data_urb) {
201 ep->prepare_data_urb(ep->data_subs, urb);
202 } else {
203
204 unsigned int offs = 0;
205 for (i = 0; i < ctx->packets; ++i) {
206 int counts;
207
208 if (ctx->packet_size[i])
209 counts = ctx->packet_size[i];
210 else
211 counts = snd_usb_endpoint_next_packet_size(ep);
212
213 urb->iso_frame_desc[i].offset = offs * ep->stride;
214 urb->iso_frame_desc[i].length = counts * ep->stride;
215 offs += counts;
216 }
217
218 urb->number_of_packets = ctx->packets;
219 urb->transfer_buffer_length = offs * ep->stride;
220 memset(urb->transfer_buffer, ep->silence_value,
221 offs * ep->stride);
222 }
223 break;
224
225 case SND_USB_ENDPOINT_TYPE_SYNC:
226 if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) {
227
228
229
230
231 urb->iso_frame_desc[0].length = 4;
232 urb->iso_frame_desc[0].offset = 0;
233 cp[0] = ep->freqn;
234 cp[1] = ep->freqn >> 8;
235 cp[2] = ep->freqn >> 16;
236 cp[3] = ep->freqn >> 24;
237 } else {
238
239
240
241
242 urb->iso_frame_desc[0].length = 3;
243 urb->iso_frame_desc[0].offset = 0;
244 cp[0] = ep->freqn >> 2;
245 cp[1] = ep->freqn >> 10;
246 cp[2] = ep->freqn >> 18;
247 }
248
249 break;
250 }
251}
252
253
254
255
256static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep,
257 struct snd_urb_ctx *urb_ctx)
258{
259 int i, offs;
260 struct urb *urb = urb_ctx->urb;
261
262 urb->dev = ep->chip->dev;
263
264 switch (ep->type) {
265 case SND_USB_ENDPOINT_TYPE_DATA:
266 offs = 0;
267 for (i = 0; i < urb_ctx->packets; i++) {
268 urb->iso_frame_desc[i].offset = offs;
269 urb->iso_frame_desc[i].length = ep->curpacksize;
270 offs += ep->curpacksize;
271 }
272
273 urb->transfer_buffer_length = offs;
274 urb->number_of_packets = urb_ctx->packets;
275 break;
276
277 case SND_USB_ENDPOINT_TYPE_SYNC:
278 urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize);
279 urb->iso_frame_desc[0].offset = 0;
280 break;
281 }
282}
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296
297
298static void queue_pending_output_urbs(struct snd_usb_endpoint *ep)
299{
300 while (test_bit(EP_FLAG_RUNNING, &ep->flags)) {
301
302 unsigned long flags;
303 struct snd_usb_packet_info *uninitialized_var(packet);
304 struct snd_urb_ctx *ctx = NULL;
305 struct urb *urb;
306 int err, i;
307
308 spin_lock_irqsave(&ep->lock, flags);
309 if (ep->next_packet_read_pos != ep->next_packet_write_pos) {
310 packet = ep->next_packet + ep->next_packet_read_pos;
311 ep->next_packet_read_pos++;
312 ep->next_packet_read_pos %= MAX_URBS;
313
314
315 if (!list_empty(&ep->ready_playback_urbs))
316 ctx = list_first_entry(&ep->ready_playback_urbs,
317 struct snd_urb_ctx, ready_list);
318 }
319 spin_unlock_irqrestore(&ep->lock, flags);
320
321 if (ctx == NULL)
322 return;
323
324 list_del_init(&ctx->ready_list);
325 urb = ctx->urb;
326
327
328 for (i = 0; i < packet->packets; i++)
329 ctx->packet_size[i] = packet->packet_size[i];
330
331
332 prepare_outbound_urb(ep, ctx);
333
334 err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
335 if (err < 0)
336 usb_audio_err(ep->chip,
337 "Unable to submit urb #%d: %d (urb %p)\n",
338 ctx->index, err, ctx->urb);
339 else
340 set_bit(ctx->index, &ep->active_mask);
341 }
342}
343
344
345
346
347static void snd_complete_urb(struct urb *urb)
348{
349 struct snd_urb_ctx *ctx = urb->context;
350 struct snd_usb_endpoint *ep = ctx->ep;
351 int err;
352
353 if (unlikely(urb->status == -ENOENT ||
354 urb->status == -ENODEV ||
355 urb->status == -ECONNRESET ||
356 urb->status == -ESHUTDOWN ||
357 ep->chip->shutdown))
358 goto exit_clear;
359
360 if (usb_pipeout(ep->pipe)) {
361 retire_outbound_urb(ep, ctx);
362
363 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
364 goto exit_clear;
365
366 if (snd_usb_endpoint_implicit_feedback_sink(ep)) {
367 unsigned long flags;
368
369 spin_lock_irqsave(&ep->lock, flags);
370 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
371 spin_unlock_irqrestore(&ep->lock, flags);
372 queue_pending_output_urbs(ep);
373
374 goto exit_clear;
375 }
376
377 prepare_outbound_urb(ep, ctx);
378 } else {
379 retire_inbound_urb(ep, ctx);
380
381 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
382 goto exit_clear;
383
384 prepare_inbound_urb(ep, ctx);
385 }
386
387 err = usb_submit_urb(urb, GFP_ATOMIC);
388 if (err == 0)
389 return;
390
391 usb_audio_err(ep->chip, "cannot submit urb (err = %d)\n", err);
392
393
394exit_clear:
395 clear_bit(ctx->index, &ep->active_mask);
396}
397
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413
414struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
415 struct usb_host_interface *alts,
416 int ep_num, int direction, int type)
417{
418 struct snd_usb_endpoint *ep;
419 int is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK;
420
421 if (WARN_ON(!alts))
422 return NULL;
423
424 mutex_lock(&chip->mutex);
425
426 list_for_each_entry(ep, &chip->ep_list, list) {
427 if (ep->ep_num == ep_num &&
428 ep->iface == alts->desc.bInterfaceNumber &&
429 ep->altsetting == alts->desc.bAlternateSetting) {
430 usb_audio_dbg(ep->chip,
431 "Re-using EP %x in iface %d,%d @%p\n",
432 ep_num, ep->iface, ep->altsetting, ep);
433 goto __exit_unlock;
434 }
435 }
436
437 usb_audio_dbg(chip, "Creating new %s %s endpoint #%x\n",
438 is_playback ? "playback" : "capture",
439 type == SND_USB_ENDPOINT_TYPE_DATA ? "data" : "sync",
440 ep_num);
441
442 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
443 if (!ep)
444 goto __exit_unlock;
445
446 ep->chip = chip;
447 spin_lock_init(&ep->lock);
448 ep->type = type;
449 ep->ep_num = ep_num;
450 ep->iface = alts->desc.bInterfaceNumber;
451 ep->altsetting = alts->desc.bAlternateSetting;
452 INIT_LIST_HEAD(&ep->ready_playback_urbs);
453 ep_num &= USB_ENDPOINT_NUMBER_MASK;
454
455 if (is_playback)
456 ep->pipe = usb_sndisocpipe(chip->dev, ep_num);
457 else
458 ep->pipe = usb_rcvisocpipe(chip->dev, ep_num);
459
460 if (type == SND_USB_ENDPOINT_TYPE_SYNC) {
461 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
462 get_endpoint(alts, 1)->bRefresh >= 1 &&
463 get_endpoint(alts, 1)->bRefresh <= 9)
464 ep->syncinterval = get_endpoint(alts, 1)->bRefresh;
465 else if (snd_usb_get_speed(chip->dev) == USB_SPEED_FULL)
466 ep->syncinterval = 1;
467 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
468 get_endpoint(alts, 1)->bInterval <= 16)
469 ep->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
470 else
471 ep->syncinterval = 3;
472
473 ep->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
474
475 if (chip->usb_id == USB_ID(0x0644, 0x8038) &&
476 ep->syncmaxsize == 4)
477 ep->udh01_fb_quirk = 1;
478 }
479
480 list_add_tail(&ep->list, &chip->ep_list);
481
482__exit_unlock:
483 mutex_unlock(&chip->mutex);
484
485 return ep;
486}
487
488
489
490
491static int wait_clear_urbs(struct snd_usb_endpoint *ep)
492{
493 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
494 int alive;
495
496 do {
497 alive = bitmap_weight(&ep->active_mask, ep->nurbs);
498 if (!alive)
499 break;
500
501 schedule_timeout_uninterruptible(1);
502 } while (time_before(jiffies, end_time));
503
504 if (alive)
505 usb_audio_err(ep->chip,
506 "timeout: still %d active urbs on EP #%x\n",
507 alive, ep->ep_num);
508 clear_bit(EP_FLAG_STOPPING, &ep->flags);
509
510 return 0;
511}
512
513
514
515
516void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep)
517{
518 if (ep && test_bit(EP_FLAG_STOPPING, &ep->flags))
519 wait_clear_urbs(ep);
520}
521
522
523
524
525static int deactivate_urbs(struct snd_usb_endpoint *ep, bool force)
526{
527 unsigned int i;
528
529 if (!force && ep->chip->shutdown)
530 return -EBADFD;
531
532 clear_bit(EP_FLAG_RUNNING, &ep->flags);
533
534 INIT_LIST_HEAD(&ep->ready_playback_urbs);
535 ep->next_packet_read_pos = 0;
536 ep->next_packet_write_pos = 0;
537
538 for (i = 0; i < ep->nurbs; i++) {
539 if (test_bit(i, &ep->active_mask)) {
540 if (!test_and_set_bit(i, &ep->unlink_mask)) {
541 struct urb *u = ep->urb[i].urb;
542 usb_unlink_urb(u);
543 }
544 }
545 }
546
547 return 0;
548}
549
550
551
552
553static void release_urbs(struct snd_usb_endpoint *ep, int force)
554{
555 int i;
556
557
558 ep->retire_data_urb = NULL;
559 ep->prepare_data_urb = NULL;
560
561
562 deactivate_urbs(ep, force);
563 wait_clear_urbs(ep);
564
565 for (i = 0; i < ep->nurbs; i++)
566 release_urb_ctx(&ep->urb[i]);
567
568 if (ep->syncbuf)
569 usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
570 ep->syncbuf, ep->sync_dma);
571
572 ep->syncbuf = NULL;
573 ep->nurbs = 0;
574}
575
576
577
578
579static int data_ep_set_params(struct snd_usb_endpoint *ep,
580 snd_pcm_format_t pcm_format,
581 unsigned int channels,
582 unsigned int period_bytes,
583 unsigned int frames_per_period,
584 unsigned int periods_per_buffer,
585 struct audioformat *fmt,
586 struct snd_usb_endpoint *sync_ep)
587{
588 unsigned int maxsize, minsize, packs_per_ms, max_packs_per_urb;
589 unsigned int max_packs_per_period, urbs_per_period, urb_packs;
590 unsigned int max_urbs, i;
591 int frame_bits = snd_pcm_format_physical_width(pcm_format) * channels;
592
593 if (pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && fmt->dsd_dop) {
594
595
596
597
598
599 frame_bits += channels << 3;
600 }
601
602 ep->datainterval = fmt->datainterval;
603 ep->stride = frame_bits >> 3;
604 ep->silence_value = pcm_format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0;
605
606
607 ep->freqmax = ep->freqn + (ep->freqn >> 2);
608 maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3))
609 >> (16 - ep->datainterval);
610
611 if (ep->maxpacksize && ep->maxpacksize < maxsize) {
612
613 maxsize = ep->maxpacksize;
614 ep->freqmax = (maxsize / (frame_bits >> 3))
615 << (16 - ep->datainterval);
616 }
617
618 if (ep->fill_max)
619 ep->curpacksize = ep->maxpacksize;
620 else
621 ep->curpacksize = maxsize;
622
623 if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL) {
624 packs_per_ms = 8 >> ep->datainterval;
625 max_packs_per_urb = MAX_PACKS_HS;
626 } else {
627 packs_per_ms = 1;
628 max_packs_per_urb = MAX_PACKS;
629 }
630 if (sync_ep && !snd_usb_endpoint_implicit_feedback_sink(ep))
631 max_packs_per_urb = min(max_packs_per_urb,
632 1U << sync_ep->syncinterval);
633 max_packs_per_urb = max(1u, max_packs_per_urb >> ep->datainterval);
634
635
636
637
638
639
640
641
642
643 if (usb_pipein(ep->pipe) ||
644 snd_usb_endpoint_implicit_feedback_sink(ep)) {
645
646 urb_packs = packs_per_ms;
647
648
649
650
651
652
653 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_WIRELESS) {
654 int interval = ep->datainterval;
655 while (interval < 5) {
656 urb_packs <<= 1;
657 ++interval;
658 }
659 }
660
661 urb_packs = min(max_packs_per_urb, urb_packs);
662 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
663 urb_packs >>= 1;
664 ep->nurbs = MAX_URBS;
665
666
667
668
669
670
671
672 } else {
673
674 minsize = (ep->freqn >> (16 - ep->datainterval)) *
675 (frame_bits >> 3);
676
677 if (sync_ep)
678 minsize -= minsize >> 3;
679 minsize = max(minsize, 1u);
680
681
682 max_packs_per_period = DIV_ROUND_UP(period_bytes, minsize);
683
684
685 urbs_per_period = DIV_ROUND_UP(max_packs_per_period,
686 max_packs_per_urb);
687
688 urb_packs = DIV_ROUND_UP(max_packs_per_period, urbs_per_period);
689
690
691 ep->max_urb_frames = DIV_ROUND_UP(frames_per_period,
692 urbs_per_period);
693
694
695 max_urbs = min((unsigned) MAX_URBS,
696 MAX_QUEUE * packs_per_ms / urb_packs);
697 ep->nurbs = min(max_urbs, urbs_per_period * periods_per_buffer);
698 }
699
700
701 for (i = 0; i < ep->nurbs; i++) {
702 struct snd_urb_ctx *u = &ep->urb[i];
703 u->index = i;
704 u->ep = ep;
705 u->packets = urb_packs;
706 u->buffer_size = maxsize * u->packets;
707
708 if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
709 u->packets++;
710 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
711 if (!u->urb)
712 goto out_of_memory;
713
714 u->urb->transfer_buffer =
715 usb_alloc_coherent(ep->chip->dev, u->buffer_size,
716 GFP_KERNEL, &u->urb->transfer_dma);
717 if (!u->urb->transfer_buffer)
718 goto out_of_memory;
719 u->urb->pipe = ep->pipe;
720 u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
721 u->urb->interval = 1 << ep->datainterval;
722 u->urb->context = u;
723 u->urb->complete = snd_complete_urb;
724 INIT_LIST_HEAD(&u->ready_list);
725 }
726
727 return 0;
728
729out_of_memory:
730 release_urbs(ep, 0);
731 return -ENOMEM;
732}
733
734
735
736
737static int sync_ep_set_params(struct snd_usb_endpoint *ep)
738{
739 int i;
740
741 ep->syncbuf = usb_alloc_coherent(ep->chip->dev, SYNC_URBS * 4,
742 GFP_KERNEL, &ep->sync_dma);
743 if (!ep->syncbuf)
744 return -ENOMEM;
745
746 for (i = 0; i < SYNC_URBS; i++) {
747 struct snd_urb_ctx *u = &ep->urb[i];
748 u->index = i;
749 u->ep = ep;
750 u->packets = 1;
751 u->urb = usb_alloc_urb(1, GFP_KERNEL);
752 if (!u->urb)
753 goto out_of_memory;
754 u->urb->transfer_buffer = ep->syncbuf + i * 4;
755 u->urb->transfer_dma = ep->sync_dma + i * 4;
756 u->urb->transfer_buffer_length = 4;
757 u->urb->pipe = ep->pipe;
758 u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
759 u->urb->number_of_packets = 1;
760 u->urb->interval = 1 << ep->syncinterval;
761 u->urb->context = u;
762 u->urb->complete = snd_complete_urb;
763 }
764
765 ep->nurbs = SYNC_URBS;
766
767 return 0;
768
769out_of_memory:
770 release_urbs(ep, 0);
771 return -ENOMEM;
772}
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791int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
792 snd_pcm_format_t pcm_format,
793 unsigned int channels,
794 unsigned int period_bytes,
795 unsigned int period_frames,
796 unsigned int buffer_periods,
797 unsigned int rate,
798 struct audioformat *fmt,
799 struct snd_usb_endpoint *sync_ep)
800{
801 int err;
802
803 if (ep->use_count != 0) {
804 usb_audio_warn(ep->chip,
805 "Unable to change format on ep #%x: already in use\n",
806 ep->ep_num);
807 return -EBUSY;
808 }
809
810
811 release_urbs(ep, 0);
812
813 ep->datainterval = fmt->datainterval;
814 ep->maxpacksize = fmt->maxpacksize;
815 ep->fill_max = !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX);
816
817 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL)
818 ep->freqn = get_usb_full_speed_rate(rate);
819 else
820 ep->freqn = get_usb_high_speed_rate(rate);
821
822
823 ep->freqm = ep->freqn;
824 ep->freqshift = INT_MIN;
825
826 ep->phase = 0;
827
828 switch (ep->type) {
829 case SND_USB_ENDPOINT_TYPE_DATA:
830 err = data_ep_set_params(ep, pcm_format, channels,
831 period_bytes, period_frames,
832 buffer_periods, fmt, sync_ep);
833 break;
834 case SND_USB_ENDPOINT_TYPE_SYNC:
835 err = sync_ep_set_params(ep);
836 break;
837 default:
838 err = -EINVAL;
839 }
840
841 usb_audio_dbg(ep->chip,
842 "Setting params for ep #%x (type %d, %d urbs), ret=%d\n",
843 ep->ep_num, ep->type, ep->nurbs, err);
844
845 return err;
846}
847
848
849
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861
862
863int snd_usb_endpoint_start(struct snd_usb_endpoint *ep, bool can_sleep)
864{
865 int err;
866 unsigned int i;
867
868 if (ep->chip->shutdown)
869 return -EBADFD;
870
871
872 if (++ep->use_count != 1)
873 return 0;
874
875
876 deactivate_urbs(ep, false);
877 if (can_sleep)
878 wait_clear_urbs(ep);
879
880 ep->active_mask = 0;
881 ep->unlink_mask = 0;
882 ep->phase = 0;
883
884 snd_usb_endpoint_start_quirk(ep);
885
886
887
888
889
890
891
892
893 set_bit(EP_FLAG_RUNNING, &ep->flags);
894
895 if (snd_usb_endpoint_implicit_feedback_sink(ep)) {
896 for (i = 0; i < ep->nurbs; i++) {
897 struct snd_urb_ctx *ctx = ep->urb + i;
898 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
899 }
900
901 return 0;
902 }
903
904 for (i = 0; i < ep->nurbs; i++) {
905 struct urb *urb = ep->urb[i].urb;
906
907 if (snd_BUG_ON(!urb))
908 goto __error;
909
910 if (usb_pipeout(ep->pipe)) {
911 prepare_outbound_urb(ep, urb->context);
912 } else {
913 prepare_inbound_urb(ep, urb->context);
914 }
915
916 err = usb_submit_urb(urb, GFP_ATOMIC);
917 if (err < 0) {
918 usb_audio_err(ep->chip,
919 "cannot submit urb %d, error %d: %s\n",
920 i, err, usb_error_string(err));
921 goto __error;
922 }
923 set_bit(i, &ep->active_mask);
924 }
925
926 return 0;
927
928__error:
929 clear_bit(EP_FLAG_RUNNING, &ep->flags);
930 ep->use_count--;
931 deactivate_urbs(ep, false);
932 return -EPIPE;
933}
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep)
950{
951 if (!ep)
952 return;
953
954 if (snd_BUG_ON(ep->use_count == 0))
955 return;
956
957 if (--ep->use_count == 0) {
958 deactivate_urbs(ep, false);
959 ep->data_subs = NULL;
960 ep->sync_slave = NULL;
961 ep->retire_data_urb = NULL;
962 ep->prepare_data_urb = NULL;
963 set_bit(EP_FLAG_STOPPING, &ep->flags);
964 }
965}
966
967
968
969
970
971
972
973
974
975
976
977void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep)
978{
979 if (!ep)
980 return;
981
982 if (ep->use_count != 0)
983 return;
984
985 deactivate_urbs(ep, true);
986 wait_clear_urbs(ep);
987}
988
989
990
991
992
993
994
995
996
997void snd_usb_endpoint_release(struct snd_usb_endpoint *ep)
998{
999 release_urbs(ep, 1);
1000}
1001
1002
1003
1004
1005
1006
1007
1008
1009void snd_usb_endpoint_free(struct list_head *head)
1010{
1011 struct snd_usb_endpoint *ep;
1012
1013 ep = list_entry(head, struct snd_usb_endpoint, list);
1014 kfree(ep);
1015}
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
1028 struct snd_usb_endpoint *sender,
1029 const struct urb *urb)
1030{
1031 int shift;
1032 unsigned int f;
1033 unsigned long flags;
1034
1035 snd_BUG_ON(ep == sender);
1036
1037
1038
1039
1040
1041
1042
1043 if (snd_usb_endpoint_implicit_feedback_sink(ep) &&
1044 ep->use_count != 0) {
1045
1046
1047 int i, bytes = 0;
1048 struct snd_urb_ctx *in_ctx;
1049 struct snd_usb_packet_info *out_packet;
1050
1051 in_ctx = urb->context;
1052
1053
1054 for (i = 0; i < in_ctx->packets; i++)
1055 if (urb->iso_frame_desc[i].status == 0)
1056 bytes += urb->iso_frame_desc[i].actual_length;
1057
1058
1059
1060
1061
1062 if (bytes == 0)
1063 return;
1064
1065 spin_lock_irqsave(&ep->lock, flags);
1066 out_packet = ep->next_packet + ep->next_packet_write_pos;
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078 out_packet->packets = in_ctx->packets;
1079 for (i = 0; i < in_ctx->packets; i++) {
1080 if (urb->iso_frame_desc[i].status == 0)
1081 out_packet->packet_size[i] =
1082 urb->iso_frame_desc[i].actual_length / sender->stride;
1083 else
1084 out_packet->packet_size[i] = 0;
1085 }
1086
1087 ep->next_packet_write_pos++;
1088 ep->next_packet_write_pos %= MAX_URBS;
1089 spin_unlock_irqrestore(&ep->lock, flags);
1090 queue_pending_output_urbs(ep);
1091
1092 return;
1093 }
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110 if (urb->iso_frame_desc[0].status != 0 ||
1111 urb->iso_frame_desc[0].actual_length < 3)
1112 return;
1113
1114 f = le32_to_cpup(urb->transfer_buffer);
1115 if (urb->iso_frame_desc[0].actual_length == 3)
1116 f &= 0x00ffffff;
1117 else
1118 f &= 0x0fffffff;
1119
1120 if (f == 0)
1121 return;
1122
1123 if (unlikely(sender->udh01_fb_quirk)) {
1124
1125
1126
1127
1128 if (f < ep->freqn - 0x8000)
1129 f += 0x10000;
1130 else if (f > ep->freqn + 0x8000)
1131 f -= 0x10000;
1132 } else if (unlikely(ep->freqshift == INT_MIN)) {
1133
1134
1135
1136
1137
1138
1139 shift = 0;
1140 while (f < ep->freqn - ep->freqn / 4) {
1141 f <<= 1;
1142 shift++;
1143 }
1144 while (f > ep->freqn + ep->freqn / 2) {
1145 f >>= 1;
1146 shift--;
1147 }
1148 ep->freqshift = shift;
1149 } else if (ep->freqshift >= 0)
1150 f <<= ep->freqshift;
1151 else
1152 f >>= -ep->freqshift;
1153
1154 if (likely(f >= ep->freqn - ep->freqn / 8 && f <= ep->freqmax)) {
1155
1156
1157
1158
1159 spin_lock_irqsave(&ep->lock, flags);
1160 ep->freqm = f;
1161 spin_unlock_irqrestore(&ep->lock, flags);
1162 } else {
1163
1164
1165
1166
1167 ep->freqshift = INT_MIN;
1168 }
1169}
1170
1171