1 // SPDX-License-Identifier: GPL-2.0-or-later 1
2 /*
3 */
4
5
6 #include <linux/init.h>
7 #include <linux/slab.h>
8 #include <linux/usb.h>
9 #include <linux/usb/audio.h>
10 #include <linux/usb/audio-v2.h>
11 #include <linux/usb/audio-v3.h>
12
13 #include <sound/core.h>
14 #include <sound/pcm.h>
15 #include <sound/control.h>
16 #include <sound/tlv.h>
17
18 #include "usbaudio.h"
19 #include "card.h"
20 #include "proc.h"
21 #include "quirks.h"
22 #include "endpoint.h"
23 #include "pcm.h"
24 #include "helper.h"
25 #include "format.h"
26 #include "clock.h"
27 #include "stream.h"
28 #include "power.h"
29 #include "media.h"
30
31 static void audioformat_free(struct audioforma
32 {
33 list_del(&fp->list); /* unlink for avo
34 kfree(fp->rate_table);
35 kfree(fp->chmap);
36 kfree(fp);
37 }
38
39 /*
40 * free a substream
41 */
42 static void free_substream(struct snd_usb_subs
43 {
44 struct audioformat *fp, *n;
45
46 if (!subs->num_formats)
47 return; /* not initialized */
48 list_for_each_entry_safe(fp, n, &subs-
49 audioformat_free(fp);
50 kfree(subs->str_pd);
51 snd_media_stream_delete(subs);
52 }
53
54
55 /*
56 * free a usb stream instance
57 */
58 static void snd_usb_audio_stream_free(struct s
59 {
60 free_substream(&stream->substream[0]);
61 free_substream(&stream->substream[1]);
62 list_del(&stream->list);
63 kfree(stream);
64 }
65
66 static void snd_usb_audio_pcm_free(struct snd_
67 {
68 struct snd_usb_stream *stream = pcm->p
69 if (stream) {
70 stream->pcm = NULL;
71 snd_usb_audio_stream_free(stre
72 }
73 }
74
75 /*
76 * initialize the substream instance.
77 */
78
79 static void snd_usb_init_substream(struct snd_
80 int stream,
81 struct audi
82 struct snd_
83 {
84 struct snd_usb_substream *subs = &as->
85
86 INIT_LIST_HEAD(&subs->fmt_list);
87 spin_lock_init(&subs->lock);
88
89 subs->stream = as;
90 subs->direction = stream;
91 subs->dev = as->chip->dev;
92 subs->txfr_quirk = !!(as->chip->quirk_
93 subs->tx_length_quirk = !!(as->chip->q
94 subs->speed = snd_usb_get_speed(subs->
95 subs->pkt_offset_adj = 0;
96 subs->stream_offset_adj = 0;
97
98 snd_usb_set_pcm_ops(as->pcm, stream);
99
100 list_add_tail(&fp->list, &subs->fmt_li
101 subs->formats |= fp->formats;
102 subs->num_formats++;
103 subs->fmt_type = fp->fmt_type;
104 subs->ep_num = fp->endpoint;
105 if (fp->channels > subs->channels_max)
106 subs->channels_max = fp->chann
107
108 if (pd) {
109 subs->str_pd = pd;
110 /* Initialize Power Domain to
111 snd_usb_power_domain_set(subs-
112 UAC3_
113 }
114
115 snd_usb_preallocate_buffer(subs);
116 }
117
118 /* kctl callbacks for usb-audio channel maps *
119 static int usb_chmap_ctl_info(struct snd_kcont
120 struct snd_ctl_e
121 {
122 struct snd_pcm_chmap *info = snd_kcont
123 struct snd_usb_substream *subs = info-
124
125 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTE
126 uinfo->count = subs->channels_max;
127 uinfo->value.integer.min = 0;
128 uinfo->value.integer.max = SNDRV_CHMAP
129 return 0;
130 }
131
132 /* check whether a duplicated entry exists in
133 static bool have_dup_chmap(struct snd_usb_subs
134 struct audioformat
135 {
136 struct audioformat *prev = fp;
137
138 list_for_each_entry_continue_reverse(p
139 if (prev->chmap &&
140 !memcmp(prev->chmap, fp->c
141 return true;
142 }
143 return false;
144 }
145
146 static int usb_chmap_ctl_tlv(struct snd_kcontr
147 unsigned int size
148 {
149 struct snd_pcm_chmap *info = snd_kcont
150 struct snd_usb_substream *subs = info-
151 struct audioformat *fp;
152 unsigned int __user *dst;
153 int count = 0;
154
155 if (size < 8)
156 return -ENOMEM;
157 if (put_user(SNDRV_CTL_TLVT_CONTAINER,
158 return -EFAULT;
159 size -= 8;
160 dst = tlv + 2;
161 list_for_each_entry(fp, &subs->fmt_lis
162 int i, ch_bytes;
163
164 if (!fp->chmap)
165 continue;
166 if (have_dup_chmap(subs, fp))
167 continue;
168 /* copy the entry */
169 ch_bytes = fp->chmap->channels
170 if (size < 8 + ch_bytes)
171 return -ENOMEM;
172 if (put_user(SNDRV_CTL_TLVT_CH
173 put_user(ch_bytes, dst + 1
174 return -EFAULT;
175 dst += 2;
176 for (i = 0; i < fp->chmap->cha
177 if (put_user(fp->chmap
178 return -EFAULT
179 }
180
181 count += 8 + ch_bytes;
182 size -= 8 + ch_bytes;
183 }
184 if (put_user(count, tlv + 1))
185 return -EFAULT;
186 return 0;
187 }
188
189 static int usb_chmap_ctl_get(struct snd_kcontr
190 struct snd_ctl_el
191 {
192 struct snd_pcm_chmap *info = snd_kcont
193 struct snd_usb_substream *subs = info-
194 struct snd_pcm_chmap_elem *chmap = NUL
195 int i = 0;
196
197 if (subs->cur_audiofmt)
198 chmap = subs->cur_audiofmt->ch
199 if (chmap) {
200 for (i = 0; i < chmap->channel
201 ucontrol->value.intege
202 }
203 for (; i < subs->channels_max; i++)
204 ucontrol->value.integer.value[
205 return 0;
206 }
207
208 /* create a chmap kctl assigned to the given U
209 static int add_chmap(struct snd_pcm *pcm, int
210 struct snd_usb_substream
211 {
212 struct audioformat *fp;
213 struct snd_pcm_chmap *chmap;
214 struct snd_kcontrol *kctl;
215 int err;
216
217 list_for_each_entry(fp, &subs->fmt_lis
218 if (fp->chmap)
219 goto ok;
220 /* no chmap is found */
221 return 0;
222
223 ok:
224 err = snd_pcm_add_chmap_ctls(pcm, stre
225 if (err < 0)
226 return err;
227
228 /* override handlers */
229 chmap->private_data = subs;
230 kctl = chmap->kctl;
231 kctl->info = usb_chmap_ctl_info;
232 kctl->get = usb_chmap_ctl_get;
233 kctl->tlv.c = usb_chmap_ctl_tlv;
234
235 return 0;
236 }
237
238 /* convert from USB ChannelConfig bits to ALSA
239 static struct snd_pcm_chmap_elem *convert_chma
240
241 {
242 static const unsigned int uac1_maps[]
243 SNDRV_CHMAP_FL, /* lef
244 SNDRV_CHMAP_FR, /* rig
245 SNDRV_CHMAP_FC, /* cen
246 SNDRV_CHMAP_LFE, /* LFE
247 SNDRV_CHMAP_RL, /* lef
248 SNDRV_CHMAP_RR, /* rig
249 SNDRV_CHMAP_FLC, /* lef
250 SNDRV_CHMAP_FRC, /* rig
251 SNDRV_CHMAP_RC, /* sur
252 SNDRV_CHMAP_SL, /* sid
253 SNDRV_CHMAP_SR, /* sid
254 SNDRV_CHMAP_TC, /* top
255 0 /* terminator */
256 };
257 static const unsigned int uac2_maps[]
258 SNDRV_CHMAP_FL, /* fro
259 SNDRV_CHMAP_FR, /* fro
260 SNDRV_CHMAP_FC, /* fro
261 SNDRV_CHMAP_LFE, /* LFE
262 SNDRV_CHMAP_RL, /* bac
263 SNDRV_CHMAP_RR, /* bac
264 SNDRV_CHMAP_FLC, /* fro
265 SNDRV_CHMAP_FRC, /* fro
266 SNDRV_CHMAP_RC, /* bac
267 SNDRV_CHMAP_SL, /* sid
268 SNDRV_CHMAP_SR, /* sid
269 SNDRV_CHMAP_TC, /* top
270 SNDRV_CHMAP_TFL, /* top
271 SNDRV_CHMAP_TFC, /* top
272 SNDRV_CHMAP_TFR, /* top
273 SNDRV_CHMAP_TRL, /* top
274 SNDRV_CHMAP_TRC, /* top
275 SNDRV_CHMAP_TRR, /* top
276 SNDRV_CHMAP_TFLC, /* top
277 SNDRV_CHMAP_TFRC, /* top
278 SNDRV_CHMAP_LLFE, /* lef
279 SNDRV_CHMAP_RLFE, /* rig
280 SNDRV_CHMAP_TSL, /* top
281 SNDRV_CHMAP_TSR, /* top
282 SNDRV_CHMAP_BC, /* bot
283 SNDRV_CHMAP_RLC, /* bac
284 SNDRV_CHMAP_RRC, /* bac
285 0 /* terminator */
286 };
287 struct snd_pcm_chmap_elem *chmap;
288 const unsigned int *maps;
289 int c;
290
291 if (channels > ARRAY_SIZE(chmap->map))
292 return NULL;
293
294 chmap = kzalloc(sizeof(*chmap), GFP_KE
295 if (!chmap)
296 return NULL;
297
298 maps = protocol == UAC_VERSION_2 ? uac
299 chmap->channels = channels;
300 c = 0;
301
302 if (bits) {
303 for (; bits && *maps; maps++,
304 if (bits & 1)
305 chmap->map[c++
306 if (c == chmap->channe
307 break;
308 }
309 } else {
310 /* If we're missing wChannelCo
311 to make sure the channel m
312 if (channels == 1)
313 chmap->map[c++] = SNDR
314 else
315 for (; c < channels &&
316 chmap->map[c++
317 }
318
319 for (; c < channels; c++)
320 chmap->map[c] = SNDRV_CHMAP_UN
321
322 return chmap;
323 }
324
325 /* UAC3 device stores channels information in
326 static struct
327 snd_pcm_chmap_elem *convert_chmap_v3(struct ua
328
329 {
330 unsigned int channels = cluster->bNrCh
331 struct snd_pcm_chmap_elem *chmap;
332 void *p = cluster;
333 int len, c;
334
335 if (channels > ARRAY_SIZE(chmap->map))
336 return NULL;
337
338 chmap = kzalloc(sizeof(*chmap), GFP_KE
339 if (!chmap)
340 return NULL;
341
342 len = le16_to_cpu(cluster->wLength);
343 c = 0;
344 p += sizeof(struct uac3_cluster_header
345
346 while (((p - (void *)cluster) < len) &
347 struct uac3_cluster_segment_de
348 u16 cs_len;
349 u8 cs_type;
350
351 cs_len = le16_to_cpu(cs_desc->
352 cs_type = cs_desc->bSegmentTyp
353
354 if (cs_type == UAC3_CHANNEL_IN
355 struct uac3_cluster_in
356 unsigned char map;
357
358 /*
359 * TODO: this conversi
360 * after adding UAC3 v
361 */
362 switch (is->bChRelatio
363 case UAC3_CH_MONO:
364 map = SNDRV_CH
365 break;
366 case UAC3_CH_LEFT:
367 case UAC3_CH_FRONT_LEF
368 case UAC3_CH_HEADPHONE
369 map = SNDRV_CH
370 break;
371 case UAC3_CH_RIGHT:
372 case UAC3_CH_FRONT_RIG
373 case UAC3_CH_HEADPHONE
374 map = SNDRV_CH
375 break;
376 case UAC3_CH_FRONT_CEN
377 map = SNDRV_CH
378 break;
379 case UAC3_CH_FRONT_LEF
380 map = SNDRV_CH
381 break;
382 case UAC3_CH_FRONT_RIG
383 map = SNDRV_CH
384 break;
385 case UAC3_CH_SIDE_LEFT
386 map = SNDRV_CH
387 break;
388 case UAC3_CH_SIDE_RIGH
389 map = SNDRV_CH
390 break;
391 case UAC3_CH_BACK_LEFT
392 map = SNDRV_CH
393 break;
394 case UAC3_CH_BACK_RIGH
395 map = SNDRV_CH
396 break;
397 case UAC3_CH_BACK_CENT
398 map = SNDRV_CH
399 break;
400 case UAC3_CH_BACK_LEFT
401 map = SNDRV_CH
402 break;
403 case UAC3_CH_BACK_RIGH
404 map = SNDRV_CH
405 break;
406 case UAC3_CH_TOP_CENTE
407 map = SNDRV_CH
408 break;
409 case UAC3_CH_TOP_FRONT
410 map = SNDRV_CH
411 break;
412 case UAC3_CH_TOP_FRONT
413 map = SNDRV_CH
414 break;
415 case UAC3_CH_TOP_FRONT
416 map = SNDRV_CH
417 break;
418 case UAC3_CH_TOP_FRONT
419 map = SNDRV_CH
420 break;
421 case UAC3_CH_TOP_FRONT
422 map = SNDRV_CH
423 break;
424 case UAC3_CH_TOP_SIDE_
425 map = SNDRV_CH
426 break;
427 case UAC3_CH_TOP_SIDE_
428 map = SNDRV_CH
429 break;
430 case UAC3_CH_TOP_BACK_
431 map = SNDRV_CH
432 break;
433 case UAC3_CH_TOP_BACK_
434 map = SNDRV_CH
435 break;
436 case UAC3_CH_TOP_BACK_
437 map = SNDRV_CH
438 break;
439 case UAC3_CH_BOTTOM_CE
440 map = SNDRV_CH
441 break;
442 case UAC3_CH_LOW_FREQU
443 map = SNDRV_CH
444 break;
445 case UAC3_CH_LFE_LEFT:
446 map = SNDRV_CH
447 break;
448 case UAC3_CH_LFE_RIGHT
449 map = SNDRV_CH
450 break;
451 case UAC3_CH_RELATIONS
452 default:
453 map = SNDRV_CH
454 break;
455 }
456 chmap->map[c++] = map;
457 }
458 p += cs_len;
459 }
460
461 if (channels < c)
462 pr_err("%s: channel number mis
463
464 chmap->channels = channels;
465
466 for (; c < channels; c++)
467 chmap->map[c] = SNDRV_CHMAP_UN
468
469 return chmap;
470 }
471
472 /*
473 * add this endpoint to the chip instance.
474 * if a stream with the same endpoint already
475 * if not, create a new pcm stream. note, fp i
476 * fmt_list and will be freed on the chip inst
477 * fp or do remove it from the substream fmt_l
478 */
479 static int __snd_usb_add_audio_stream(struct s
480 int stre
481 struct a
482 struct s
483
484 {
485 struct snd_usb_stream *as;
486 struct snd_usb_substream *subs;
487 struct snd_pcm *pcm;
488 int err;
489
490 list_for_each_entry(as, &chip->pcm_lis
491 if (as->fmt_type != fp->fmt_ty
492 continue;
493 subs = &as->substream[stream];
494 if (subs->ep_num == fp->endpoi
495 list_add_tail(&fp->lis
496 subs->num_formats++;
497 subs->formats |= fp->f
498 return 0;
499 }
500 }
501
502 if (chip->card->registered)
503 chip->need_delayed_register =
504
505 /* look for an empty stream */
506 list_for_each_entry(as, &chip->pcm_lis
507 if (as->fmt_type != fp->fmt_ty
508 continue;
509 subs = &as->substream[stream];
510 if (subs->ep_num)
511 continue;
512 err = snd_pcm_new_stream(as->p
513 if (err < 0)
514 return err;
515 snd_usb_init_substream(as, str
516 return add_chmap(as->pcm, stre
517 }
518
519 /* create a new pcm */
520 as = kzalloc(sizeof(*as), GFP_KERNEL);
521 if (!as)
522 return -ENOMEM;
523 as->pcm_index = chip->pcm_devs;
524 as->chip = chip;
525 as->fmt_type = fp->fmt_type;
526 err = snd_pcm_new(chip->card, "USB Aud
527 stream == SNDRV_PCM_
528 stream == SNDRV_PCM_
529 &pcm);
530 if (err < 0) {
531 kfree(as);
532 return err;
533 }
534 as->pcm = pcm;
535 pcm->private_data = as;
536 pcm->private_free = snd_usb_audio_pcm_
537 pcm->info_flags = 0;
538 if (chip->pcm_devs > 0)
539 sprintf(pcm->name, "USB Audio
540 else
541 strcpy(pcm->name, "USB Audio")
542
543 snd_usb_init_substream(as, stream, fp,
544
545 /*
546 * Keep using head insertion for M-Aud
547 * fix to swap capture stream order in
548 */
549 if (chip->usb_id == USB_ID(0x0763, 0x2
550 list_add(&as->list, &chip->pcm
551 else
552 list_add_tail(&as->list, &chip
553
554 chip->pcm_devs++;
555
556 snd_usb_proc_pcm_format_add(as);
557
558 return add_chmap(pcm, stream, &as->sub
559 }
560
561 int snd_usb_add_audio_stream(struct snd_usb_au
562 int stream,
563 struct audioforma
564 {
565 return __snd_usb_add_audio_stream(chip
566 }
567
568 static int snd_usb_add_audio_stream_v3(struct
569 int str
570 struct
571 struct
572 {
573 return __snd_usb_add_audio_stream(chip
574 }
575
576 static int parse_uac_endpoint_attributes(struc
577 struc
578 int p
579 {
580 /* parsed with a v1 header here. that'
581 * header first which is the same for
582 struct uac_iso_endpoint_descriptor *cs
583 struct usb_interface_descriptor *altsd
584 int attributes = 0;
585
586 csep = snd_usb_find_desc(alts->endpoin
587
588 /* Creamware Noah has this descriptor
589 if (!csep && altsd->bNumEndpoints >= 2
590 csep = snd_usb_find_desc(alts-
591
592 /*
593 * If we can't locate the USB_DT_CS_EN
594 * bytes after the first endpoint, go
595 * Some devices have it directly *befo
596 */
597 if (!csep)
598 csep = snd_usb_find_desc(alts-
599
600 if (!csep || csep->bLength < 7 ||
601 csep->bDescriptorSubtype != UAC_EP
602 goto error;
603
604 if (protocol == UAC_VERSION_1) {
605 attributes = csep->bmAttribute
606 } else if (protocol == UAC_VERSION_2)
607 struct uac2_iso_endpoint_descr
608 (struct uac2_iso_endpo
609
610 if (csep2->bLength < sizeof(*c
611 goto error;
612 attributes = csep->bmAttribute
613
614 /* emulate the endpoint attrib
615 if (csep2->bmControls & UAC2_C
616 attributes |= UAC_EP_C
617 } else { /* UAC_VERSION_3 */
618 struct uac3_iso_endpoint_descr
619 (struct uac3_iso_endpo
620
621 if (csep3->bLength < sizeof(*c
622 goto error;
623 /* emulate the endpoint attrib
624 if (le32_to_cpu(csep3->bmContr
625 attributes |= UAC_EP_C
626 }
627
628 return attributes;
629
630 error:
631 usb_audio_warn(chip,
632 "%u:%d : no or invalid
633 iface_no, altsd->bAlter
634 return 0;
635 }
636
637 /* find an input terminal descriptor (either U
638 * terminal id
639 */
640 static void *
641 snd_usb_find_input_terminal_descriptor(struct
642 int ter
643 {
644 struct uac2_input_terminal_descriptor
645
646 while ((term = snd_usb_find_csint_desc
647
648
649 if (!snd_usb_validate_audio_de
650 continue;
651 if (term->bTerminalID == termi
652 return term;
653 }
654
655 return NULL;
656 }
657
658 static void *
659 snd_usb_find_output_terminal_descriptor(struct
660 int te
661 {
662 /* OK to use with both UAC2 and UAC3 *
663 struct uac2_output_terminal_descriptor
664
665 while ((term = snd_usb_find_csint_desc
666
667
668 if (!snd_usb_validate_audio_de
669 continue;
670 if (term->bTerminalID == termi
671 return term;
672 }
673
674 return NULL;
675 }
676
677 static struct audioformat *
678 audio_format_alloc_init(struct snd_usb_audio *
679 struct usb_host_interfa
680 int protocol, int iface
681 int altno, int num_chan
682 {
683 struct audioformat *fp;
684
685 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
686 if (!fp)
687 return NULL;
688
689 fp->iface = iface_no;
690 fp->altsetting = altno;
691 fp->altset_idx = altset_idx;
692 fp->endpoint = get_endpoint(alts, 0)->
693 fp->ep_attr = get_endpoint(alts, 0)->b
694 fp->datainterval = snd_usb_parse_datai
695 fp->protocol = protocol;
696 fp->maxpacksize = le16_to_cpu(get_endp
697 fp->channels = num_channels;
698 if (snd_usb_get_speed(chip->dev) == US
699 fp->maxpacksize = (((fp->maxpa
700 * (fp->maxpack
701 fp->clock = clock;
702 INIT_LIST_HEAD(&fp->list);
703
704 return fp;
705 }
706
707 static struct audioformat *
708 snd_usb_get_audioformat_uac12(struct snd_usb_a
709 struct usb_host_
710 int protocol, in
711 int altno, int s
712 {
713 struct usb_device *dev = chip->dev;
714 struct uac_format_type_i_continuous_de
715 unsigned int num_channels = 0, chconfi
716 struct usb_host_interface *ctrl_intf;
717 struct audioformat *fp;
718 int clock = 0;
719 u64 format;
720
721 ctrl_intf = snd_usb_find_ctrl_interfac
722
723 /* get audio formats */
724 if (protocol == UAC_VERSION_1) {
725 struct uac1_as_header_descript
726 snd_usb_find_csint_des
727
728 struct uac_input_terminal_desc
729
730 if (!as) {
731 dev_err(&dev->dev,
732 "%u:%d : UAC_A
733 iface_no, altn
734 return NULL;
735 }
736
737 if (as->bLength < sizeof(*as))
738 dev_err(&dev->dev,
739 "%u:%d : inval
740 iface_no, altn
741 return NULL;
742 }
743
744 format = le16_to_cpu(as->wForm
745
746 iterm = snd_usb_find_input_ter
747
748
749 if (iterm) {
750 num_channels = iterm->
751 chconfig = le16_to_cpu
752 }
753 } else { /* UAC_VERSION_2 */
754 struct uac2_input_terminal_des
755 struct uac2_output_terminal_de
756 struct uac2_as_header_descript
757 snd_usb_find_csint_des
758
759
760 if (!as) {
761 dev_err(&dev->dev,
762 "%u:%d : UAC_A
763 iface_no, altn
764 return NULL;
765 }
766
767 if (as->bLength < sizeof(*as))
768 dev_err(&dev->dev,
769 "%u:%d : inval
770 iface_no, altn
771 return NULL;
772 }
773
774 num_channels = as->bNrChannels
775 format = le32_to_cpu(as->bmFor
776 chconfig = le32_to_cpu(as->bmC
777
778 /*
779 * lookup the terminal associa
780 * to extract the clock
781 */
782 input_term = snd_usb_find_inpu
783
784
785 if (input_term) {
786 clock = input_term->bC
787 if (!chconfig && (num_
788 chconfig = le3
789 goto found_clock;
790 }
791
792 output_term = snd_usb_find_out
793
794
795 if (output_term) {
796 clock = output_term->b
797 goto found_clock;
798 }
799
800 dev_err(&dev->dev,
801 "%u:%d : bogus bTermin
802 iface_no, altno, as->b
803 return NULL;
804 }
805
806 found_clock:
807 /* get format type */
808 fmt = snd_usb_find_csint_desc(alts->ex
809 NULL, UA
810 if (!fmt) {
811 dev_err(&dev->dev,
812 "%u:%d : no UAC_FORMAT
813 iface_no, altno);
814 return NULL;
815 }
816 if (((protocol == UAC_VERSION_1) && (f
817 || ((protocol == UAC_V
818 (fmt->
819 dev_err(&dev->dev,
820 "%u:%d : invalid UAC_F
821 iface_no, altno);
822 return NULL;
823 }
824
825 /*
826 * Blue Microphones workaround: The la
827 * identical with the previous one, ex
828 * packet size, but is actually a misl
829 * setting; ignore it.
830 *
831 * Part 2: analyze quirk flag and form
832 */
833 if (bm_quirk && fmt->bNrChannels == 1
834 return NULL;
835
836 fp = audio_format_alloc_init(chip, alt
837 altset_id
838 if (!fp)
839 return ERR_PTR(-ENOMEM);
840
841 fp->attributes = parse_uac_endpoint_at
842
843
844 /* some quirks for attributes here */
845 snd_usb_audioformat_attributes_quirk(c
846
847 /* ok, let's parse further... */
848 if (snd_usb_parse_audio_format(chip, f
849 fmt, s
850 audioformat_free(fp);
851 return NULL;
852 }
853
854 /* Create chmap */
855 if (fp->channels != num_channels)
856 chconfig = 0;
857
858 fp->chmap = convert_chmap(fp->channels
859
860 return fp;
861 }
862
863 static struct audioformat *
864 snd_usb_get_audioformat_uac3(struct snd_usb_au
865 struct usb_host_i
866 struct snd_usb_po
867 int iface_no, int
868 int altno, int st
869 {
870 struct usb_device *dev = chip->dev;
871 struct uac3_input_terminal_descriptor
872 struct uac3_output_terminal_descriptor
873 struct uac3_cluster_header_descriptor
874 struct uac3_as_header_descriptor *as =
875 struct uac3_hc_descriptor_header hc_he
876 struct usb_host_interface *ctrl_intf;
877 struct snd_pcm_chmap_elem *chmap;
878 struct snd_usb_power_domain *pd;
879 unsigned char badd_profile;
880 u64 badd_formats = 0;
881 unsigned int num_channels;
882 struct audioformat *fp;
883 u16 cluster_id, wLength;
884 int clock = 0;
885 int err;
886
887 badd_profile = chip->badd_profile;
888 ctrl_intf = snd_usb_find_ctrl_interfac
889
890 if (badd_profile >= UAC3_FUNCTION_SUBC
891 unsigned int maxpacksize =
892 le16_to_cpu(get_endpoi
893
894 switch (maxpacksize) {
895 default:
896 dev_err(&dev->dev,
897 "%u:%d : incor
898 iface_no, altn
899 return NULL;
900 case UAC3_BADD_EP_MAXPSIZE_SYN
901 case UAC3_BADD_EP_MAXPSIZE_ASY
902 badd_formats = SNDRV_P
903 num_channels = 1;
904 break;
905 case UAC3_BADD_EP_MAXPSIZE_SYN
906 case UAC3_BADD_EP_MAXPSIZE_ASY
907 badd_formats = SNDRV_P
908 num_channels = 1;
909 break;
910 case UAC3_BADD_EP_MAXPSIZE_SYN
911 case UAC3_BADD_EP_MAXPSIZE_ASY
912 badd_formats = SNDRV_P
913 num_channels = 2;
914 break;
915 case UAC3_BADD_EP_MAXPSIZE_SYN
916 case UAC3_BADD_EP_MAXPSIZE_ASY
917 badd_formats = SNDRV_P
918 num_channels = 2;
919 break;
920 }
921
922 chmap = kzalloc(sizeof(*chmap)
923 if (!chmap)
924 return ERR_PTR(-ENOMEM
925
926 if (num_channels == 1) {
927 chmap->map[0] = SNDRV_
928 } else {
929 chmap->map[0] = SNDRV_
930 chmap->map[1] = SNDRV_
931 }
932
933 chmap->channels = num_channels
934 clock = UAC3_BADD_CS_ID9;
935 goto found_clock;
936 }
937
938 as = snd_usb_find_csint_desc(alts->ext
939 NULL, UAC
940 if (!as) {
941 dev_err(&dev->dev,
942 "%u:%d : UAC_AS_GENERA
943 iface_no, altno);
944 return NULL;
945 }
946
947 if (as->bLength < sizeof(*as)) {
948 dev_err(&dev->dev,
949 "%u:%d : invalid UAC_A
950 iface_no, altno);
951 return NULL;
952 }
953
954 cluster_id = le16_to_cpu(as->wClusterD
955 if (!cluster_id) {
956 dev_err(&dev->dev,
957 "%u:%d : no cluster de
958 iface_no, altno);
959 return NULL;
960 }
961
962 /*
963 * Get number of channels and channel
964 * High Capability Cluster Descriptor
965 *
966 * First step: get High Capability hea
967 * read size of Cluster Descriptor
968 */
969 err = snd_usb_ctl_msg(chip->dev,
970 usb_rcvctrlpipe(chip->
971 UAC3_CS_REQ_HIGH_CAPAB
972 USB_RECIP_INTERFACE |
973 cluster_id,
974 snd_usb_ctrl_intf(ctrl
975 &hc_header, sizeof(hc_
976 if (err < 0)
977 return ERR_PTR(err);
978 else if (err != sizeof(hc_header)) {
979 dev_err(&dev->dev,
980 "%u:%d : can't get Hig
981 iface_no, altno);
982 return ERR_PTR(-EIO);
983 }
984
985 /*
986 * Second step: allocate needed amount
987 * and request Cluster Descriptor
988 */
989 wLength = le16_to_cpu(hc_header.wLengt
990 cluster = kzalloc(wLength, GFP_KERNEL)
991 if (!cluster)
992 return ERR_PTR(-ENOMEM);
993 err = snd_usb_ctl_msg(chip->dev,
994 usb_rcvctrlpipe(chip->
995 UAC3_CS_REQ_HIGH_CAPAB
996 USB_RECIP_INTERFACE |
997 cluster_id,
998 snd_usb_ctrl_intf(ctrl
999 cluster, wLength);
1000 if (err < 0) {
1001 kfree(cluster);
1002 return ERR_PTR(err);
1003 } else if (err != wLength) {
1004 dev_err(&dev->dev,
1005 "%u:%d : can't get Cl
1006 iface_no, altno);
1007 kfree(cluster);
1008 return ERR_PTR(-EIO);
1009 }
1010
1011 num_channels = cluster->bNrChannels;
1012 chmap = convert_chmap_v3(cluster);
1013 kfree(cluster);
1014
1015 /*
1016 * lookup the terminal associated to
1017 * to extract the clock
1018 */
1019 input_term = snd_usb_find_input_termi
1020
1021
1022 if (input_term) {
1023 clock = input_term->bCSourceI
1024 goto found_clock;
1025 }
1026
1027 output_term = snd_usb_find_output_ter
1028
1029
1030 if (output_term) {
1031 clock = output_term->bCSource
1032 goto found_clock;
1033 }
1034
1035 dev_err(&dev->dev, "%u:%d : bogus bTe
1036 iface_no, altno, as->
1037 kfree(chmap);
1038 return NULL;
1039
1040 found_clock:
1041 fp = audio_format_alloc_init(chip, al
1042 altset_i
1043 if (!fp) {
1044 kfree(chmap);
1045 return ERR_PTR(-ENOMEM);
1046 }
1047
1048 fp->chmap = chmap;
1049
1050 if (badd_profile >= UAC3_FUNCTION_SUB
1051 fp->attributes = 0; /* No att
1052
1053 fp->fmt_type = UAC_FORMAT_TYP
1054 fp->formats = badd_formats;
1055
1056 fp->nr_rates = 0; /* SN
1057 fp->rate_min = UAC3_BADD_SAMP
1058 fp->rate_max = UAC3_BADD_SAMP
1059 fp->rates = SNDRV_PCM_RATE_CO
1060
1061 pd = kzalloc(sizeof(*pd), GFP
1062 if (!pd) {
1063 audioformat_free(fp);
1064 return NULL;
1065 }
1066 pd->pd_id = (stream == SNDRV_
1067 UAC3_
1068 pd->pd_d1d0_rec = UAC3_BADD_P
1069 pd->pd_d2d0_rec = UAC3_BADD_P
1070 pd->ctrl_iface = ctrl_intf;
1071
1072 } else {
1073 fp->attributes = parse_uac_en
1074
1075
1076
1077 pd = snd_usb_find_power_domai
1078
1079
1080 /* ok, let's parse further...
1081 if (snd_usb_parse_audio_forma
1082 kfree(pd);
1083 audioformat_free(fp);
1084 return NULL;
1085 }
1086 }
1087
1088 if (pd)
1089 *pd_out = pd;
1090
1091 return fp;
1092 }
1093
1094 static int __snd_usb_parse_audio_interface(st
1095 in
1096 bo
1097 {
1098 struct usb_device *dev;
1099 struct usb_interface *iface;
1100 struct usb_host_interface *alts;
1101 struct usb_interface_descriptor *alts
1102 int i, altno, err, stream;
1103 struct audioformat *fp = NULL;
1104 struct snd_usb_power_domain *pd = NUL
1105 bool set_iface_first;
1106 int num, protocol;
1107
1108 dev = chip->dev;
1109
1110 /* parse the interface's altsettings
1111 iface = usb_ifnum_to_if(dev, iface_no
1112
1113 num = iface->num_altsetting;
1114
1115 /*
1116 * Dallas DS4201 workaround: It prese
1117 * one misses syncpipe, and does not
1118 */
1119 if (chip->usb_id == USB_ID(0x04fa, 0x
1120 num = 4;
1121
1122 for (i = 0; i < num; i++) {
1123 alts = &iface->altsetting[i];
1124 altsd = get_iface_desc(alts);
1125 protocol = altsd->bInterfaceP
1126 /* skip invalid one */
1127 if (((altsd->bInterfaceClass
1128 (altsd->bInterfaceSubCl
1129 altsd->bInterfaceSubCl
1130 altsd->bInterfaceClass !
1131 altsd->bNumEndpoints < 1
1132 le16_to_cpu(get_endpoint(
1133 continue;
1134 /* must be isochronous */
1135 if ((get_endpoint(alts, 0)->b
1136 USB_ENDPOINT_XFER_ISOC)
1137 continue;
1138 /* check direction */
1139 stream = (get_endpoint(alts,
1140 SNDRV_PCM_STREAM_CAPT
1141 altno = altsd->bAlternateSett
1142
1143 if (snd_usb_apply_interface_q
1144 continue;
1145
1146 /*
1147 * Roland audio streaming int
1148 * 0/1/2, but are UAC 1 compa
1149 */
1150 if (USB_ID_VENDOR(chip->usb_i
1151 altsd->bInterfaceClass ==
1152 protocol <= 2)
1153 protocol = UAC_VERSIO
1154
1155 switch (protocol) {
1156 default:
1157 dev_dbg(&dev->dev, "%
1158 iface_no, alt
1159 protocol = UAC_VERSIO
1160 fallthrough;
1161 case UAC_VERSION_1:
1162 case UAC_VERSION_2: {
1163 int bm_quirk = 0;
1164
1165 /*
1166 * Blue Microphones w
1167 * identical with the
1168 * packet size, but i
1169 * setting; ignore it
1170 *
1171 * Part 1: prepare qu
1172 */
1173 if (altno == 2 && num
1174 fp && fp->altsett
1175 fp->formats == SN
1176 protocol == UAC_V
1177 le16_to_cpu(get_e
1178
1179 bm_quirk = 1;
1180
1181 fp = snd_usb_get_audi
1182
1183
1184 break;
1185 }
1186 case UAC_VERSION_3:
1187 fp = snd_usb_get_audi
1188
1189 break;
1190 }
1191
1192 if (!fp)
1193 continue;
1194 else if (IS_ERR(fp))
1195 return PTR_ERR(fp);
1196
1197 if (fp->fmt_type != UAC_FORMA
1198 *has_non_pcm = true;
1199 if ((fp->fmt_type == UAC_FORM
1200 audioformat_free(fp);
1201 kfree(pd);
1202 fp = NULL;
1203 pd = NULL;
1204 continue;
1205 }
1206
1207 snd_usb_audioformat_set_sync_
1208
1209 dev_dbg(&dev->dev, "%u:%d: ad
1210 if (protocol == UAC_VERSION_3
1211 err = snd_usb_add_aud
1212 else
1213 err = snd_usb_add_aud
1214
1215 if (err < 0) {
1216 audioformat_free(fp);
1217 kfree(pd);
1218 return err;
1219 }
1220
1221 /* add endpoints */
1222 err = snd_usb_add_endpoint(ch
1223 SN
1224 if (err < 0)
1225 return err;
1226
1227 if (fp->sync_ep) {
1228 err = snd_usb_add_end
1229
1230
1231
1232 if (err < 0)
1233 return err;
1234 }
1235
1236 set_iface_first = false;
1237 if (protocol == UAC_VERSION_1
1238 (chip->quirk_flags & QUIR
1239 set_iface_first = tru
1240
1241 /* try to set the interface..
1242 usb_set_interface(chip->dev,
1243 if (set_iface_first)
1244 usb_set_interface(chi
1245 snd_usb_init_pitch(chip, fp);
1246 snd_usb_init_sample_rate(chip
1247 if (!set_iface_first)
1248 usb_set_interface(chi
1249 }
1250 return 0;
1251 }
1252
1253 int snd_usb_parse_audio_interface(struct snd_
1254 {
1255 int err;
1256 bool has_non_pcm = false;
1257
1258 /* parse PCM formats */
1259 err = __snd_usb_parse_audio_interface
1260 if (err < 0)
1261 return err;
1262
1263 if (has_non_pcm) {
1264 /* parse non-PCM formats */
1265 err = __snd_usb_parse_audio_i
1266 if (err < 0)
1267 return err;
1268 }
1269
1270 return 0;
1271 }
1272
1273
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