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Merge drm/drm-next into drm-misc-next-fixes
[linux-2.6-block.git] / sound / usb / stream.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
e8e8babf 2/*
e8e8babf
DM		 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>
9a2fe9b8 11#include <linux/usb/audio-v3.h>
e8e8babf
DM		 12
13#include <sound/core.h>
14#include <sound/pcm.h>
04324ccc
TI		 15#include <sound/control.h>
16#include <sound/tlv.h>
e8e8babf
DM		 17
18#include "usbaudio.h"
19#include "card.h"
20#include "proc.h"
21#include "quirks.h"
22#include "endpoint.h"
e8e8babf
DM		 23#include "pcm.h"
24#include "helper.h"
25#include "format.h"
26#include "clock.h"
27#include "stream.h"
7edf3b5e 28#include "power.h"
66354f18 29#include "media.h"
e8e8babf 30
c1ae5e7f
TI		 31static void audioformat_free(struct audioformat *fp)
32{
33 list_del(&fp->list); /* unlink for avoiding double-free */
34 kfree(fp->rate_table);
35 kfree(fp->chmap);
36 kfree(fp);
37}
38
e8e8babf
DM		 39/*
40 * free a substream
41 */
42static void free_substream(struct snd_usb_substream *subs)
43{
88766f04 44 struct audioformat *fp, *n;
e8e8babf
DM		 45
46 if (!subs->num_formats)
47 return; /* not initialized */
c1ae5e7f
TI		 48 list_for_each_entry_safe(fp, n, &subs->fmt_list, list)
49 audioformat_free(fp);
7edf3b5e 50 kfree(subs->str_pd);
66354f18 51 snd_media_stream_delete(subs);
e8e8babf
DM		 52}
53
54
55/*
56 * free a usb stream instance
57 */
58static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
59{
60 free_substream(&stream->substream[0]);
61 free_substream(&stream->substream[1]);
62 list_del(&stream->list);
63 kfree(stream);
64}
65
66static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
67{
68 struct snd_usb_stream *stream = pcm->private_data;
69 if (stream) {
70 stream->pcm = NULL;
71 snd_usb_audio_stream_free(stream);
72 }
73}
74
edcd3633
DM		 75/*
76 * initialize the substream instance.
77 */
78
79static void snd_usb_init_substream(struct snd_usb_stream *as,
80 int stream,
7edf3b5e
JS		 81 struct audioformat *fp,
82 struct snd_usb_power_domain *pd)
edcd3633
DM		 83{
84 struct snd_usb_substream *subs = &as->substream[stream];
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;
af158a7f 92 subs->txfr_quirk = !!(as->chip->quirk_flags & QUIRK_FLAG_ALIGN_TRANSFER);
c1b034a4 93 subs->tx_length_quirk = !!(as->chip->quirk_flags & QUIRK_FLAG_TX_LENGTH);
978520b7 94 subs->speed = snd_usb_get_speed(subs->dev);
1539d4f8 95 subs->pkt_offset_adj = 0;
1b7ecc24 96 subs->stream_offset_adj = 0;
edcd3633
DM		 97
98 snd_usb_set_pcm_ops(as->pcm, stream);
99
100 list_add_tail(&fp->list, &subs->fmt_list);
101 subs->formats |= fp->formats;
102 subs->num_formats++;
103 subs->fmt_type = fp->fmt_type;
8260ef07 104 subs->ep_num = fp->endpoint;
04324ccc
TI		 105 if (fp->channels > subs->channels_max)
106 subs->channels_max = fp->channels;
f274baa4 107
a0a4959e 108 if (pd) {
7edf3b5e 109 subs->str_pd = pd;
a0a4959e
JS		 110 /* Initialize Power Domain to idle status D1 */
111 snd_usb_power_domain_set(subs->stream->chip, pd,
112 UAC3_PD_STATE_D1);
113 }
7edf3b5e 114
f274baa4 115 snd_usb_preallocate_buffer(subs);
04324ccc
TI		 116}
117
118/* kctl callbacks for usb-audio channel maps */
119static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
120 struct snd_ctl_elem_info *uinfo)
121{
122 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
123 struct snd_usb_substream *subs = info->private_data;
124
125 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
126 uinfo->count = subs->channels_max;
127 uinfo->value.integer.min = 0;
128 uinfo->value.integer.max = SNDRV_CHMAP_LAST;
129 return 0;
130}
131
132/* check whether a duplicated entry exists in the audiofmt list */
133static bool have_dup_chmap(struct snd_usb_substream *subs,
134 struct audioformat *fp)
135{
f67d71ae 136 struct audioformat *prev = fp;
04324ccc 137
f67d71ae 138 list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
04324ccc
TI		 139 if (prev->chmap &&
140 !memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap)))
141 return true;
142 }
143 return false;
144}
145
146static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
147 unsigned int size, unsigned int __user *tlv)
148{
149 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
150 struct snd_usb_substream *subs = info->private_data;
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, tlv))
158 return -EFAULT;
159 size -= 8;
160 dst = tlv + 2;
161 list_for_each_entry(fp, &subs->fmt_list, list) {
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 * 4;
170 if (size < 8 + ch_bytes)
171 return -ENOMEM;
172 if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
173 put_user(ch_bytes, dst + 1))
174 return -EFAULT;
175 dst += 2;
176 for (i = 0; i < fp->chmap->channels; i++, dst++) {
177 if (put_user(fp->chmap->map[i], dst))
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
189static int usb_chmap_ctl_get(struct snd_kcontrol *kcontrol,
190 struct snd_ctl_elem_value *ucontrol)
191{
192 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
193 struct snd_usb_substream *subs = info->private_data;
194 struct snd_pcm_chmap_elem *chmap = NULL;
c6dde8ff 195 int i = 0;
04324ccc 196
04324ccc
TI		 197 if (subs->cur_audiofmt)
198 chmap = subs->cur_audiofmt->chmap;
199 if (chmap) {
200 for (i = 0; i < chmap->channels; i++)
201 ucontrol->value.integer.value[i] = chmap->map[i];
202 }
c6dde8ff
TI		 203 for (; i < subs->channels_max; i++)
204 ucontrol->value.integer.value[i] = 0;
04324ccc
TI		 205 return 0;
206}
207
208/* create a chmap kctl assigned to the given USB substream */
209static int add_chmap(struct snd_pcm *pcm, int stream,
210 struct snd_usb_substream *subs)
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_list, list)
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, stream, NULL, 0, 0, &chmap);
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 chmap element */
239static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
240 int protocol)
241{
a01df925 242 static const unsigned int uac1_maps[] = {
04324ccc
TI		 243 SNDRV_CHMAP_FL, /* left front */
244 SNDRV_CHMAP_FR, /* right front */
245 SNDRV_CHMAP_FC, /* center front */
246 SNDRV_CHMAP_LFE, /* LFE */
247 SNDRV_CHMAP_SL, /* left surround */
248 SNDRV_CHMAP_SR, /* right surround */
249 SNDRV_CHMAP_FLC, /* left of center */
250 SNDRV_CHMAP_FRC, /* right of center */
251 SNDRV_CHMAP_RC, /* surround */
252 SNDRV_CHMAP_SL, /* side left */
253 SNDRV_CHMAP_SR, /* side right */
254 SNDRV_CHMAP_TC, /* top */
255 0 /* terminator */
256 };
a01df925 257 static const unsigned int uac2_maps[] = {
04324ccc
TI		 258 SNDRV_CHMAP_FL, /* front left */
259 SNDRV_CHMAP_FR, /* front right */
260 SNDRV_CHMAP_FC, /* front center */
261 SNDRV_CHMAP_LFE, /* LFE */
262 SNDRV_CHMAP_RL, /* back left */
263 SNDRV_CHMAP_RR, /* back right */
264 SNDRV_CHMAP_FLC, /* front left of center */
265 SNDRV_CHMAP_FRC, /* front right of center */
266 SNDRV_CHMAP_RC, /* back center */
267 SNDRV_CHMAP_SL, /* side left */
268 SNDRV_CHMAP_SR, /* side right */
269 SNDRV_CHMAP_TC, /* top center */
270 SNDRV_CHMAP_TFL, /* top front left */
271 SNDRV_CHMAP_TFC, /* top front center */
272 SNDRV_CHMAP_TFR, /* top front right */
273 SNDRV_CHMAP_TRL, /* top back left */
274 SNDRV_CHMAP_TRC, /* top back center */
275 SNDRV_CHMAP_TRR, /* top back right */
276 SNDRV_CHMAP_TFLC, /* top front left of center */
277 SNDRV_CHMAP_TFRC, /* top front right of center */
278 SNDRV_CHMAP_LLFE, /* left LFE */
279 SNDRV_CHMAP_RLFE, /* right LFE */
280 SNDRV_CHMAP_TSL, /* top side left */
281 SNDRV_CHMAP_TSR, /* top side right */
282 SNDRV_CHMAP_BC, /* bottom center */
71373fdd
AH		 283 SNDRV_CHMAP_RLC, /* back left of center */
284 SNDRV_CHMAP_RRC, /* back right of center */
04324ccc
TI		 285 0 /* terminator */
286 };
287 struct snd_pcm_chmap_elem *chmap;
288 const unsigned int *maps;
289 int c;
290
04324ccc
TI		 291 if (channels > ARRAY_SIZE(chmap->map))
292 return NULL;
293
294 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
295 if (!chmap)
296 return NULL;
297
298 maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
299 chmap->channels = channels;
300 c = 0;
0dca01c3
DH		 301
302 if (bits) {
303 for (; bits && *maps; maps++, bits >>= 1)
304 if (bits & 1)
305 chmap->map[c++] = *maps;
306 } else {
307 /* If we're missing wChannelConfig, then guess something
308 to make sure the channel map is not skipped entirely */
309 if (channels == 1)
310 chmap->map[c++] = SNDRV_CHMAP_MONO;
311 else
312 for (; c < channels && *maps; maps++)
313 chmap->map[c++] = *maps;
04324ccc
TI		 314 }
315
316 for (; c < channels; c++)
317 chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
318
319 return chmap;
edcd3633 320}
e8e8babf 321
9a2fe9b8
RB		 322/* UAC3 device stores channels information in Cluster Descriptors */
323static struct
324snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
325 *cluster)
326{
327 unsigned int channels = cluster->bNrChannels;
328 struct snd_pcm_chmap_elem *chmap;
329 void *p = cluster;
330 int len, c;
331
332 if (channels > ARRAY_SIZE(chmap->map))
333 return NULL;
334
335 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
336 if (!chmap)
337 return NULL;
338
339 len = le16_to_cpu(cluster->wLength);
340 c = 0;
341 p += sizeof(struct uac3_cluster_header_descriptor);
342
343 while (((p - (void *)cluster) < len) && (c < channels)) {
344 struct uac3_cluster_segment_descriptor *cs_desc = p;
345 u16 cs_len;
346 u8 cs_type;
347
348 cs_len = le16_to_cpu(cs_desc->wLength);
349 cs_type = cs_desc->bSegmentType;
350
351 if (cs_type == UAC3_CHANNEL_INFORMATION) {
352 struct uac3_cluster_information_segment_descriptor *is = p;
353 unsigned char map;
354
355 /*
356 * TODO: this conversion is not complete, update it
357 * after adding UAC3 values to asound.h
358 */
8e0428a7 359 switch (is->bChRelationship) {
9a2fe9b8
RB		 360 case UAC3_CH_MONO:
361 map = SNDRV_CHMAP_MONO;
362 break;
363 case UAC3_CH_LEFT:
364 case UAC3_CH_FRONT_LEFT:
365 case UAC3_CH_HEADPHONE_LEFT:
366 map = SNDRV_CHMAP_FL;
367 break;
368 case UAC3_CH_RIGHT:
369 case UAC3_CH_FRONT_RIGHT:
370 case UAC3_CH_HEADPHONE_RIGHT:
371 map = SNDRV_CHMAP_FR;
372 break;
373 case UAC3_CH_FRONT_CENTER:
374 map = SNDRV_CHMAP_FC;
375 break;
376 case UAC3_CH_FRONT_LEFT_OF_CENTER:
377 map = SNDRV_CHMAP_FLC;
378 break;
379 case UAC3_CH_FRONT_RIGHT_OF_CENTER:
380 map = SNDRV_CHMAP_FRC;
381 break;
382 case UAC3_CH_SIDE_LEFT:
383 map = SNDRV_CHMAP_SL;
384 break;
385 case UAC3_CH_SIDE_RIGHT:
386 map = SNDRV_CHMAP_SR;
387 break;
388 case UAC3_CH_BACK_LEFT:
389 map = SNDRV_CHMAP_RL;
390 break;
391 case UAC3_CH_BACK_RIGHT:
392 map = SNDRV_CHMAP_RR;
393 break;
394 case UAC3_CH_BACK_CENTER:
395 map = SNDRV_CHMAP_RC;
396 break;
397 case UAC3_CH_BACK_LEFT_OF_CENTER:
398 map = SNDRV_CHMAP_RLC;
399 break;
400 case UAC3_CH_BACK_RIGHT_OF_CENTER:
401 map = SNDRV_CHMAP_RRC;
402 break;
403 case UAC3_CH_TOP_CENTER:
404 map = SNDRV_CHMAP_TC;
405 break;
406 case UAC3_CH_TOP_FRONT_LEFT:
407 map = SNDRV_CHMAP_TFL;
408 break;
409 case UAC3_CH_TOP_FRONT_RIGHT:
410 map = SNDRV_CHMAP_TFR;
411 break;
412 case UAC3_CH_TOP_FRONT_CENTER:
413 map = SNDRV_CHMAP_TFC;
414 break;
415 case UAC3_CH_TOP_FRONT_LOC:
416 map = SNDRV_CHMAP_TFLC;
417 break;
418 case UAC3_CH_TOP_FRONT_ROC:
419 map = SNDRV_CHMAP_TFRC;
420 break;
421 case UAC3_CH_TOP_SIDE_LEFT:
422 map = SNDRV_CHMAP_TSL;
423 break;
424 case UAC3_CH_TOP_SIDE_RIGHT:
425 map = SNDRV_CHMAP_TSR;
426 break;
427 case UAC3_CH_TOP_BACK_LEFT:
428 map = SNDRV_CHMAP_TRL;
429 break;
430 case UAC3_CH_TOP_BACK_RIGHT:
431 map = SNDRV_CHMAP_TRR;
432 break;
433 case UAC3_CH_TOP_BACK_CENTER:
434 map = SNDRV_CHMAP_TRC;
435 break;
436 case UAC3_CH_BOTTOM_CENTER:
437 map = SNDRV_CHMAP_BC;
438 break;
439 case UAC3_CH_LOW_FREQUENCY_EFFECTS:
440 map = SNDRV_CHMAP_LFE;
441 break;
442 case UAC3_CH_LFE_LEFT:
443 map = SNDRV_CHMAP_LLFE;
444 break;
445 case UAC3_CH_LFE_RIGHT:
446 map = SNDRV_CHMAP_RLFE;
447 break;
448 case UAC3_CH_RELATIONSHIP_UNDEFINED:
449 default:
450 map = SNDRV_CHMAP_UNKNOWN;
451 break;
452 }
453 chmap->map[c++] = map;
454 }
455 p += cs_len;
456 }
457
458 if (channels < c)
459 pr_err("%s: channel number mismatch\n", __func__);
460
461 chmap->channels = channels;
462
463 for (; c < channels; c++)
464 chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
465
466 return chmap;
467}
468
e8e8babf
DM		 469/*
470 * add this endpoint to the chip instance.
471 * if a stream with the same endpoint already exists, append to it.
836b34a9
VD		 472 * if not, create a new pcm stream. note, fp is added to the substream
473 * fmt_list and will be freed on the chip instance release. do not free
474 * fp or do remove it from the substream fmt_list to avoid double-free.
e8e8babf 475 */
7edf3b5e
JS		 476static int __snd_usb_add_audio_stream(struct snd_usb_audio *chip,
477 int stream,
478 struct audioformat *fp,
479 struct snd_usb_power_domain *pd)
480
e8e8babf 481{
e8e8babf
DM		 482 struct snd_usb_stream *as;
483 struct snd_usb_substream *subs;
484 struct snd_pcm *pcm;
485 int err;
486
88766f04 487 list_for_each_entry(as, &chip->pcm_list, list) {
e8e8babf
DM		 488 if (as->fmt_type != fp->fmt_type)
489 continue;
490 subs = &as->substream[stream];
8260ef07 491 if (subs->ep_num == fp->endpoint) {
e8e8babf
DM		 492 list_add_tail(&fp->list, &subs->fmt_list);
493 subs->num_formats++;
494 subs->formats |= fp->formats;
495 return 0;
496 }
497 }
7e1afce5
TI		 498
499 if (chip->card->registered)
500 chip->need_delayed_register = true;
501
e8e8babf 502 /* look for an empty stream */
88766f04 503 list_for_each_entry(as, &chip->pcm_list, list) {
e8e8babf
DM		 504 if (as->fmt_type != fp->fmt_type)
505 continue;
506 subs = &as->substream[stream];
8260ef07 507 if (subs->ep_num)
e8e8babf
DM		 508 continue;
509 err = snd_pcm_new_stream(as->pcm, stream, 1);
510 if (err < 0)
511 return err;
7edf3b5e 512 snd_usb_init_substream(as, stream, fp, pd);
04324ccc 513 return add_chmap(as->pcm, stream, subs);
e8e8babf
DM		 514 }
515
516 /* create a new pcm */
517 as = kzalloc(sizeof(*as), GFP_KERNEL);
518 if (!as)
519 return -ENOMEM;
520 as->pcm_index = chip->pcm_devs;
521 as->chip = chip;
522 as->fmt_type = fp->fmt_type;
523 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
524 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
525 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
526 &pcm);
527 if (err < 0) {
528 kfree(as);
529 return err;
530 }
531 as->pcm = pcm;
532 pcm->private_data = as;
533 pcm->private_free = snd_usb_audio_pcm_free;
534 pcm->info_flags = 0;
535 if (chip->pcm_devs > 0)
536 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
537 else
538 strcpy(pcm->name, "USB Audio");
539
7edf3b5e 540 snd_usb_init_substream(as, stream, fp, pd);
e8e8babf 541
5ee20bc7
JR		 542 /*
543 * Keep using head insertion for M-Audio Audiophile USB (tm) which has a
544 * fix to swap capture stream order in conf/cards/USB-audio.conf
545 */
546 if (chip->usb_id == USB_ID(0x0763, 0x2003))
547 list_add(&as->list, &chip->pcm_list);
548 else
549 list_add_tail(&as->list, &chip->pcm_list);
550
e8e8babf
DM		 551 chip->pcm_devs++;
552
553 snd_usb_proc_pcm_format_add(as);
554
04324ccc 555 return add_chmap(pcm, stream, &as->substream[stream]);
e8e8babf
DM		 556}
557
7edf3b5e
JS		 558int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
559 int stream,
560 struct audioformat *fp)
561{
562 return __snd_usb_add_audio_stream(chip, stream, fp, NULL);
563}
564
565static int snd_usb_add_audio_stream_v3(struct snd_usb_audio *chip,
566 int stream,
567 struct audioformat *fp,
568 struct snd_usb_power_domain *pd)
569{
570 return __snd_usb_add_audio_stream(chip, stream, fp, pd);
571}
572
e8e8babf
DM		 573static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
574 struct usb_host_interface *alts,
575 int protocol, int iface_no)
576{
577 /* parsed with a v1 header here. that's ok as we only look at the
578 * header first which is the same for both versions */
579 struct uac_iso_endpoint_descriptor *csep;
580 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
581 int attributes = 0;
582
583 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
584
585 /* Creamware Noah has this descriptor after the 2nd endpoint */
586 if (!csep && altsd->bNumEndpoints >= 2)
587 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
588
ebfc594c
DM		 589 /*
590 * If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra
591 * bytes after the first endpoint, go search the entire interface.
592 * Some devices have it directly *before* the standard endpoint.
593 */
594 if (!csep)
595 csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT);
596
e8e8babf 597 if (!csep || csep->bLength < 7 ||
3e96d728
TI		 598 csep->bDescriptorSubtype != UAC_EP_GENERAL)
599 goto error;
e8e8babf
DM		 600
601 if (protocol == UAC_VERSION_1) {
602 attributes = csep->bmAttributes;
c99f0802 603 } else if (protocol == UAC_VERSION_2) {
e8e8babf
DM		 604 struct uac2_iso_endpoint_descriptor *csep2 =
605 (struct uac2_iso_endpoint_descriptor *) csep;
606
3e96d728
TI		 607 if (csep2->bLength < sizeof(*csep2))
608 goto error;
e8e8babf
DM		 609 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
610
611 /* emulate the endpoint attributes of a v1 device */
612 if (csep2->bmControls & UAC2_CONTROL_PITCH)
613 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
c99f0802
JS		 614 } else { /* UAC_VERSION_3 */
615 struct uac3_iso_endpoint_descriptor *csep3 =
616 (struct uac3_iso_endpoint_descriptor *) csep;
617
3e96d728
TI		 618 if (csep3->bLength < sizeof(*csep3))
619 goto error;
c99f0802
JS		 620 /* emulate the endpoint attributes of a v1 device */
621 if (le32_to_cpu(csep3->bmControls) & UAC2_CONTROL_PITCH)
622 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
e8e8babf
DM		 623 }
624
625 return attributes;
3e96d728
TI		 626
627 error:
628 usb_audio_warn(chip,
629 "%u:%d : no or invalid class specific endpoint descriptor\n",
630 iface_no, altsd->bAlternateSetting);
631 return 0;
e8e8babf
DM		 632}
633
04324ccc
TI		 634/* find an input terminal descriptor (either UAC1 or UAC2) with the given
635 * terminal id
636 */
637static void *
638snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
57f87706 639 int terminal_id, int protocol)
e8e8babf
DM		 640{
641 struct uac2_input_terminal_descriptor *term = NULL;
642
643 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
644 ctrl_iface->extralen,
645 term, UAC_INPUT_TERMINAL))) {
57f87706 646 if (!snd_usb_validate_audio_desc(term, protocol))
3e96d728 647 continue;
e8e8babf
DM		 648 if (term->bTerminalID == terminal_id)
649 return term;
650 }
651
652 return NULL;
653}
654
9a2fe9b8
RB		 655static void *
656snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
57f87706 657 int terminal_id, int protocol)
e8e8babf 658{
9a2fe9b8 659 /* OK to use with both UAC2 and UAC3 */
e8e8babf
DM		 660 struct uac2_output_terminal_descriptor *term = NULL;
661
662 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
663 ctrl_iface->extralen,
664 term, UAC_OUTPUT_TERMINAL))) {
57f87706
TI		 665 if (!snd_usb_validate_audio_desc(term, protocol))
666 continue;
667 if (term->bTerminalID == terminal_id)
e8e8babf
DM		 668 return term;
669 }
670
671 return NULL;
672}
673
4d47fa84
RB		 674static struct audioformat *
675audio_format_alloc_init(struct snd_usb_audio *chip,
676 struct usb_host_interface *alts,
677 int protocol, int iface_no, int altset_idx,
678 int altno, int num_channels, int clock)
679{
680 struct audioformat *fp;
681
682 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
683 if (!fp)
684 return NULL;
685
686 fp->iface = iface_no;
687 fp->altsetting = altno;
688 fp->altset_idx = altset_idx;
689 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
690 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
691 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
692 fp->protocol = protocol;
693 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
694 fp->channels = num_channels;
695 if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH)
696 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
697 * (fp->maxpacksize & 0x7ff);
698 fp->clock = clock;
699 INIT_LIST_HEAD(&fp->list);
700
701 return fp;
702}
703
68faa863
RB		 704static struct audioformat *
705snd_usb_get_audioformat_uac12(struct snd_usb_audio *chip,
706 struct usb_host_interface *alts,
707 int protocol, int iface_no, int altset_idx,
708 int altno, int stream, int bm_quirk)
709{
710 struct usb_device *dev = chip->dev;
711 struct uac_format_type_i_continuous_descriptor *fmt;
712 unsigned int num_channels = 0, chconfig = 0;
713 struct audioformat *fp;
714 int clock = 0;
715 u64 format;
716
717 /* get audio formats */
718 if (protocol == UAC_VERSION_1) {
719 struct uac1_as_header_descriptor *as =
720 snd_usb_find_csint_desc(alts->extra, alts->extralen,
721 NULL, UAC_AS_GENERAL);
722 struct uac_input_terminal_descriptor *iterm;
723
724 if (!as) {
725 dev_err(&dev->dev,
726 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
727 iface_no, altno);
728 return NULL;
729 }
730
731 if (as->bLength < sizeof(*as)) {
732 dev_err(&dev->dev,
733 "%u:%d : invalid UAC_AS_GENERAL desc\n",
734 iface_no, altno);
735 return NULL;
736 }
737
738 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
739
740 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
3e96d728 741 as->bTerminalLink,
57f87706 742 protocol);
68faa863
RB		 743 if (iterm) {
744 num_channels = iterm->bNrChannels;
745 chconfig = le16_to_cpu(iterm->wChannelConfig);
746 }
747 } else { /* UAC_VERSION_2 */
748 struct uac2_input_terminal_descriptor *input_term;
749 struct uac2_output_terminal_descriptor *output_term;
750 struct uac2_as_header_descriptor *as =
751 snd_usb_find_csint_desc(alts->extra, alts->extralen,
752 NULL, UAC_AS_GENERAL);
753
754 if (!as) {
755 dev_err(&dev->dev,
756 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
757 iface_no, altno);
758 return NULL;
759 }
760
761 if (as->bLength < sizeof(*as)) {
762 dev_err(&dev->dev,
763 "%u:%d : invalid UAC_AS_GENERAL desc\n",
764 iface_no, altno);
765 return NULL;
766 }
767
768 num_channels = as->bNrChannels;
769 format = le32_to_cpu(as->bmFormats);
770 chconfig = le32_to_cpu(as->bmChannelConfig);
771
772 /*
773 * lookup the terminal associated to this interface
774 * to extract the clock
775 */
776 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
3e96d728 777 as->bTerminalLink,
57f87706 778 protocol);
68faa863
RB		 779 if (input_term) {
780 clock = input_term->bCSourceID;
781 if (!chconfig && (num_channels == input_term->bNrChannels))
782 chconfig = le32_to_cpu(input_term->bmChannelConfig);
783 goto found_clock;
784 }
785
786 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
57f87706
TI		 787 as->bTerminalLink,
788 protocol);
68faa863
RB		 789 if (output_term) {
790 clock = output_term->bCSourceID;
791 goto found_clock;
792 }
793
794 dev_err(&dev->dev,
795 "%u:%d : bogus bTerminalLink %d\n",
796 iface_no, altno, as->bTerminalLink);
797 return NULL;
798 }
799
800found_clock:
801 /* get format type */
802 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
803 NULL, UAC_FORMAT_TYPE);
804 if (!fmt) {
805 dev_err(&dev->dev,
806 "%u:%d : no UAC_FORMAT_TYPE desc\n",
807 iface_no, altno);
808 return NULL;
809 }
810 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
811 || ((protocol == UAC_VERSION_2) &&
812 (fmt->bLength < 6))) {
813 dev_err(&dev->dev,
814 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
815 iface_no, altno);
816 return NULL;
817 }
818
819 /*
820 * Blue Microphones workaround: The last altsetting is
821 * identical with the previous one, except for a larger
822 * packet size, but is actually a mislabeled two-channel
823 * setting; ignore it.
824 *
825 * Part 2: analyze quirk flag and format
826 */
827 if (bm_quirk && fmt->bNrChannels == 1 && fmt->bSubframeSize == 2)
828 return NULL;
829
830 fp = audio_format_alloc_init(chip, alts, protocol, iface_no,
831 altset_idx, altno, num_channels, clock);
832 if (!fp)
833 return ERR_PTR(-ENOMEM);
834
835 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol,
836 iface_no);
837
838 /* some quirks for attributes here */
839 snd_usb_audioformat_attributes_quirk(chip, fp, stream);
840
841 /* ok, let's parse further... */
842 if (snd_usb_parse_audio_format(chip, fp, format,
843 fmt, stream) < 0) {
c1ae5e7f 844 audioformat_free(fp);
68faa863
RB		 845 return NULL;
846 }
847
848 /* Create chmap */
849 if (fp->channels != num_channels)
850 chconfig = 0;
851
852 fp->chmap = convert_chmap(fp->channels, chconfig, protocol);
853
854 return fp;
855}
4d47fa84 856
eda553f4
RB		 857static struct audioformat *
858snd_usb_get_audioformat_uac3(struct snd_usb_audio *chip,
859 struct usb_host_interface *alts,
7edf3b5e 860 struct snd_usb_power_domain **pd_out,
eda553f4
RB		 861 int iface_no, int altset_idx,
862 int altno, int stream)
863{
864 struct usb_device *dev = chip->dev;
865 struct uac3_input_terminal_descriptor *input_term;
866 struct uac3_output_terminal_descriptor *output_term;
867 struct uac3_cluster_header_descriptor *cluster;
17156f23 868 struct uac3_as_header_descriptor *as = NULL;
eda553f4
RB		 869 struct uac3_hc_descriptor_header hc_header;
870 struct snd_pcm_chmap_elem *chmap;
7edf3b5e 871 struct snd_usb_power_domain *pd;
17156f23
RB		 872 unsigned char badd_profile;
873 u64 badd_formats = 0;
eda553f4
RB		 874 unsigned int num_channels;
875 struct audioformat *fp;
876 u16 cluster_id, wLength;
877 int clock = 0;
878 int err;
879
17156f23
RB		 880 badd_profile = chip->badd_profile;
881
882 if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
883 unsigned int maxpacksize =
884 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
885
886 switch (maxpacksize) {
887 default:
888 dev_err(&dev->dev,
889 "%u:%d : incorrect wMaxPacketSize for BADD profile\n",
890 iface_no, altno);
891 return NULL;
892 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16:
893 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16:
894 badd_formats = SNDRV_PCM_FMTBIT_S16_LE;
895 num_channels = 1;
896 break;
897 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24:
898 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24:
899 badd_formats = SNDRV_PCM_FMTBIT_S24_3LE;
900 num_channels = 1;
901 break;
902 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16:
903 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16:
904 badd_formats = SNDRV_PCM_FMTBIT_S16_LE;
905 num_channels = 2;
906 break;
907 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24:
908 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24:
909 badd_formats = SNDRV_PCM_FMTBIT_S24_3LE;
910 num_channels = 2;
911 break;
912 }
913
914 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
915 if (!chmap)
916 return ERR_PTR(-ENOMEM);
917
918 if (num_channels == 1) {
919 chmap->map[0] = SNDRV_CHMAP_MONO;
920 } else {
921 chmap->map[0] = SNDRV_CHMAP_FL;
922 chmap->map[1] = SNDRV_CHMAP_FR;
923 }
924
925 chmap->channels = num_channels;
926 clock = UAC3_BADD_CS_ID9;
927 goto found_clock;
928 }
929
eda553f4
RB		 930 as = snd_usb_find_csint_desc(alts->extra, alts->extralen,
931 NULL, UAC_AS_GENERAL);
932 if (!as) {
933 dev_err(&dev->dev,
934 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
935 iface_no, altno);
936 return NULL;
937 }
938
939 if (as->bLength < sizeof(*as)) {
940 dev_err(&dev->dev,
941 "%u:%d : invalid UAC_AS_GENERAL desc\n",
942 iface_no, altno);
943 return NULL;
944 }
945
946 cluster_id = le16_to_cpu(as->wClusterDescrID);
947 if (!cluster_id) {
948 dev_err(&dev->dev,
949 "%u:%d : no cluster descriptor\n",
950 iface_no, altno);
951 return NULL;
952 }
953
954 /*
955 * Get number of channels and channel map through
956 * High Capability Cluster Descriptor
957 *
958 * First step: get High Capability header and
959 * read size of Cluster Descriptor
960 */
961 err = snd_usb_ctl_msg(chip->dev,
962 usb_rcvctrlpipe(chip->dev, 0),
963 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
964 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
965 cluster_id,
966 snd_usb_ctrl_intf(chip),
967 &hc_header, sizeof(hc_header));
968 if (err < 0)
969 return ERR_PTR(err);
970 else if (err != sizeof(hc_header)) {
971 dev_err(&dev->dev,
972 "%u:%d : can't get High Capability descriptor\n",
973 iface_no, altno);
974 return ERR_PTR(-EIO);
975 }
976
977 /*
978 * Second step: allocate needed amount of memory
979 * and request Cluster Descriptor
980 */
981 wLength = le16_to_cpu(hc_header.wLength);
982 cluster = kzalloc(wLength, GFP_KERNEL);
983 if (!cluster)
984 return ERR_PTR(-ENOMEM);
985 err = snd_usb_ctl_msg(chip->dev,
986 usb_rcvctrlpipe(chip->dev, 0),
987 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
988 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
989 cluster_id,
990 snd_usb_ctrl_intf(chip),
991 cluster, wLength);
992 if (err < 0) {
993 kfree(cluster);
994 return ERR_PTR(err);
995 } else if (err != wLength) {
996 dev_err(&dev->dev,
997 "%u:%d : can't get Cluster Descriptor\n",
998 iface_no, altno);
999 kfree(cluster);
1000 return ERR_PTR(-EIO);
1001 }
1002
1003 num_channels = cluster->bNrChannels;
1004 chmap = convert_chmap_v3(cluster);
1005 kfree(cluster);
1006
1007 /*
1008 * lookup the terminal associated to this interface
1009 * to extract the clock
1010 */
1011 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
3e96d728 1012 as->bTerminalLink,
57f87706 1013 UAC_VERSION_3);
eda553f4
RB		 1014 if (input_term) {
1015 clock = input_term->bCSourceID;
1016 goto found_clock;
1017 }
1018
1019 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
57f87706
TI		 1020 as->bTerminalLink,
1021 UAC_VERSION_3);
eda553f4
RB		 1022 if (output_term) {
1023 clock = output_term->bCSourceID;
1024 goto found_clock;
1025 }
1026
1027 dev_err(&dev->dev, "%u:%d : bogus bTerminalLink %d\n",
1028 iface_no, altno, as->bTerminalLink);
6cd17ea7 1029 kfree(chmap);
eda553f4
RB		 1030 return NULL;
1031
1032found_clock:
1033 fp = audio_format_alloc_init(chip, alts, UAC_VERSION_3, iface_no,
1034 altset_idx, altno, num_channels, clock);
6cd17ea7
RB		 1035 if (!fp) {
1036 kfree(chmap);
eda553f4 1037 return ERR_PTR(-ENOMEM);
6cd17ea7 1038 }
eda553f4 1039
eda553f4
RB		 1040 fp->chmap = chmap;
1041
17156f23
RB		 1042 if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
1043 fp->attributes = 0; /* No attributes */
1044
1045 fp->fmt_type = UAC_FORMAT_TYPE_I;
1046 fp->formats = badd_formats;
1047
1048 fp->nr_rates = 0; /* SNDRV_PCM_RATE_CONTINUOUS */
1049 fp->rate_min = UAC3_BADD_SAMPLING_RATE;
1050 fp->rate_max = UAC3_BADD_SAMPLING_RATE;
1051 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
1052
11175556 1053 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
7edf3b5e 1054 if (!pd) {
c1ae5e7f 1055 audioformat_free(fp);
7edf3b5e
JS		 1056 return NULL;
1057 }
1058 pd->pd_id = (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
1059 UAC3_BADD_PD_ID10 : UAC3_BADD_PD_ID11;
1060 pd->pd_d1d0_rec = UAC3_BADD_PD_RECOVER_D1D0;
1061 pd->pd_d2d0_rec = UAC3_BADD_PD_RECOVER_D2D0;
1062
17156f23
RB		 1063 } else {
1064 fp->attributes = parse_uac_endpoint_attributes(chip, alts,
1065 UAC_VERSION_3,
1066 iface_no);
7edf3b5e
JS		 1067
1068 pd = snd_usb_find_power_domain(chip->ctrl_intf,
1069 as->bTerminalLink);
1070
17156f23
RB		 1071 /* ok, let's parse further... */
1072 if (snd_usb_parse_audio_format_v3(chip, fp, as, stream) < 0) {
7edf3b5e 1073 kfree(pd);
c1ae5e7f 1074 audioformat_free(fp);
17156f23
RB		 1075 return NULL;
1076 }
eda553f4
RB		 1077 }
1078
7edf3b5e
JS		 1079 if (pd)
1080 *pd_out = pd;
1081
eda553f4
RB		 1082 return fp;
1083}
1084
f7f53018
AT		 1085static int __snd_usb_parse_audio_interface(struct snd_usb_audio *chip,
1086 int iface_no,
1087 bool *has_non_pcm, bool non_pcm)
e8e8babf
DM		 1088{
1089 struct usb_device *dev;
1090 struct usb_interface *iface;
1091 struct usb_host_interface *alts;
1092 struct usb_interface_descriptor *altsd;
1093 int i, altno, err, stream;
e8e8babf 1094 struct audioformat *fp = NULL;
7edf3b5e 1095 struct snd_usb_power_domain *pd = NULL;
5fadc941 1096 bool set_iface_first;
eda553f4 1097 int num, protocol;
e8e8babf
DM		 1098
1099 dev = chip->dev;
1100
1101 /* parse the interface's altsettings */
1102 iface = usb_ifnum_to_if(dev, iface_no);
1103
1104 num = iface->num_altsetting;
1105
1106 /*
1107 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
1108 * one misses syncpipe, and does not produce any sound.
1109 */
e53f47f6 1110 if (chip->usb_id == USB_ID(0x04fa, 0x4201) && num >= 4)
e8e8babf
DM		 1111 num = 4;
1112
1113 for (i = 0; i < num; i++) {
1114 alts = &iface->altsetting[i];
1115 altsd = get_iface_desc(alts);
1116 protocol = altsd->bInterfaceProtocol;
1117 /* skip invalid one */
aafe77cc
CL		 1118 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
1119 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
1120 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
e8e8babf 1121 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
e8e8babf
DM		 1122 altsd->bNumEndpoints < 1 ||
1123 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
1124 continue;
1125 /* must be isochronous */
1126 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1127 USB_ENDPOINT_XFER_ISOC)
1128 continue;
1129 /* check direction */
1130 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
1131 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
1132 altno = altsd->bAlternateSetting;
1133
1134 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
1135 continue;
1136
aafe77cc
CL		 1137 /*
1138 * Roland audio streaming interfaces are marked with protocols
1139 * 0/1/2, but are UAC 1 compatible.
1140 */
1141 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
1142 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
1143 protocol <= 2)
1144 protocol = UAC_VERSION_1;
1145
e8e8babf
DM		 1146 switch (protocol) {
1147 default:
0ba41d91
TI		 1148 dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n",
1149 iface_no, altno, protocol);
e8e8babf 1150 protocol = UAC_VERSION_1;
c0dbbdad 1151 fallthrough;
68faa863 1152 case UAC_VERSION_1:
e8e8babf 1153 case UAC_VERSION_2: {
68faa863 1154 int bm_quirk = 0;
e8e8babf 1155
68faa863
RB		 1156 /*
1157 * Blue Microphones workaround: The last altsetting is
1158 * identical with the previous one, except for a larger
1159 * packet size, but is actually a mislabeled two-channel
1160 * setting; ignore it.
1161 *
1162 * Part 1: prepare quirk flag
1163 */
1164 if (altno == 2 && num == 3 &&
1165 fp && fp->altsetting == 1 && fp->channels == 1 &&
1166 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
1167 protocol == UAC_VERSION_1 &&
1168 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
1169 fp->maxpacksize * 2)
1170 bm_quirk = 1;
e8e8babf 1171
68faa863
RB		 1172 fp = snd_usb_get_audioformat_uac12(chip, alts, protocol,
1173 iface_no, i, altno,
1174 stream, bm_quirk);
1175 break;
e8e8babf 1176 }
eda553f4 1177 case UAC_VERSION_3:
7edf3b5e 1178 fp = snd_usb_get_audioformat_uac3(chip, alts, &pd,
eda553f4
RB		 1179 iface_no, i, altno, stream);
1180 break;
9a2fe9b8 1181 }
e8e8babf 1182
9ecb2406 1183 if (!fp)
68faa863 1184 continue;
eda553f4
RB		 1185 else if (IS_ERR(fp))
1186 return PTR_ERR(fp);
e8e8babf 1187
f7f53018
AT		 1188 if (fp->fmt_type != UAC_FORMAT_TYPE_I)
1189 *has_non_pcm = true;
1190 if ((fp->fmt_type == UAC_FORMAT_TYPE_I) == non_pcm) {
1191 audioformat_free(fp);
1192 kfree(pd);
1193 fp = NULL;
1194 pd = NULL;
1195 continue;
1196 }
1197
f6581c0e
TI		 1198 snd_usb_audioformat_set_sync_ep(chip, fp);
1199
0ba41d91 1200 dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
7edf3b5e
JS		 1201 if (protocol == UAC_VERSION_3)
1202 err = snd_usb_add_audio_stream_v3(chip, stream, fp, pd);
1203 else
1204 err = snd_usb_add_audio_stream(chip, stream, fp);
1205
e8e8babf 1206 if (err < 0) {
c1ae5e7f 1207 audioformat_free(fp);
7edf3b5e 1208 kfree(pd);
e8e8babf
DM		 1209 return err;
1210 }
54cb3190
TI		 1211
1212 /* add endpoints */
1213 err = snd_usb_add_endpoint(chip, fp->endpoint,
1214 SND_USB_ENDPOINT_TYPE_DATA);
1215 if (err < 0)
1216 return err;
1217
1218 if (fp->sync_ep) {
1219 err = snd_usb_add_endpoint(chip, fp->sync_ep,
1220 fp->implicit_fb ?
1221 SND_USB_ENDPOINT_TYPE_DATA :
1222 SND_USB_ENDPOINT_TYPE_SYNC);
1223 if (err < 0)
1224 return err;
1225 }
16f1f838 1226
5fadc941
TI		 1227 set_iface_first = false;
1228 if (protocol == UAC_VERSION_1 ||
1229 (chip->quirk_flags & QUIRK_FLAG_SET_IFACE_FIRST))
1230 set_iface_first = true;
1231
16f1f838
TI		 1232 /* try to set the interface... */
1233 usb_set_interface(chip->dev, iface_no, 0);
5fadc941
TI		 1234 if (set_iface_first)
1235 usb_set_interface(chip->dev, iface_no, altno);
16f1f838
TI		 1236 snd_usb_init_pitch(chip, fp);
1237 snd_usb_init_sample_rate(chip, fp, fp->rate_max);
5fadc941
TI		 1238 if (!set_iface_first)
1239 usb_set_interface(chip->dev, iface_no, altno);
e8e8babf
DM		 1240 }
1241 return 0;
1242}
1243
f7f53018
AT		 1244int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
1245{
1246 int err;
1247 bool has_non_pcm = false;
1248
1249 /* parse PCM formats */
1250 err = __snd_usb_parse_audio_interface(chip, iface_no, &has_non_pcm, false);
1251 if (err < 0)
1252 return err;
1253
1254 if (has_non_pcm) {
1255 /* parse non-PCM formats */
1256 err = __snd_usb_parse_audio_interface(chip, iface_no, &has_non_pcm, true);
1257 if (err < 0)
1258 return err;
1259 }
1260
1261 return 0;
1262}
1263
Linux 6.x block layer and io_uring tree(s)