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1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 */
16
17
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/usb.h>
21#include <linux/usb/audio.h>
22#include <linux/usb/audio-v2.h>
23#include <linux/usb/audio-v3.h>
24
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/control.h>
28#include <sound/tlv.h>
29
30#include "usbaudio.h"
31#include "card.h"
32#include "proc.h"
33#include "quirks.h"
34#include "endpoint.h"
35#include "pcm.h"
36#include "helper.h"
37#include "format.h"
38#include "clock.h"
39#include "stream.h"
40
41/*
42 * free a substream
43 */
44static void free_substream(struct snd_usb_substream *subs)
45{
46 struct audioformat *fp, *n;
47
48 if (!subs->num_formats)
49 return; /* not initialized */
50 list_for_each_entry_safe(fp, n, &subs->fmt_list, list) {
51 kfree(fp->rate_table);
52 kfree(fp->chmap);
53 kfree(fp);
54 }
55 kfree(subs->rate_list.list);
56}
57
58
59/*
60 * free a usb stream instance
61 */
62static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
63{
64 free_substream(&stream->substream[0]);
65 free_substream(&stream->substream[1]);
66 list_del(&stream->list);
67 kfree(stream);
68}
69
70static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
71{
72 struct snd_usb_stream *stream = pcm->private_data;
73 if (stream) {
74 stream->pcm = NULL;
75 snd_usb_audio_stream_free(stream);
76 }
77}
78
79/*
80 * initialize the substream instance.
81 */
82
83static void snd_usb_init_substream(struct snd_usb_stream *as,
84 int stream,
85 struct audioformat *fp)
86{
87 struct snd_usb_substream *subs = &as->substream[stream];
88
89 INIT_LIST_HEAD(&subs->fmt_list);
90 spin_lock_init(&subs->lock);
91
92 subs->stream = as;
93 subs->direction = stream;
94 subs->dev = as->chip->dev;
95 subs->txfr_quirk = as->chip->txfr_quirk;
96 subs->tx_length_quirk = as->chip->tx_length_quirk;
97 subs->speed = snd_usb_get_speed(subs->dev);
98 subs->pkt_offset_adj = 0;
99
100 snd_usb_set_pcm_ops(as->pcm, stream);
101
102 list_add_tail(&fp->list, &subs->fmt_list);
103 subs->formats |= fp->formats;
104 subs->num_formats++;
105 subs->fmt_type = fp->fmt_type;
106 subs->ep_num = fp->endpoint;
107 if (fp->channels > subs->channels_max)
108 subs->channels_max = fp->channels;
109}
110
111/* kctl callbacks for usb-audio channel maps */
112static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
113 struct snd_ctl_elem_info *uinfo)
114{
115 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
116 struct snd_usb_substream *subs = info->private_data;
117
118 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
119 uinfo->count = subs->channels_max;
120 uinfo->value.integer.min = 0;
121 uinfo->value.integer.max = SNDRV_CHMAP_LAST;
122 return 0;
123}
124
125/* check whether a duplicated entry exists in the audiofmt list */
126static bool have_dup_chmap(struct snd_usb_substream *subs,
127 struct audioformat *fp)
128{
129 struct audioformat *prev = fp;
130
131 list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
132 if (prev->chmap &&
133 !memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap)))
134 return true;
135 }
136 return false;
137}
138
139static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
140 unsigned int size, unsigned int __user *tlv)
141{
142 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
143 struct snd_usb_substream *subs = info->private_data;
144 struct audioformat *fp;
145 unsigned int __user *dst;
146 int count = 0;
147
148 if (size < 8)
149 return -ENOMEM;
150 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
151 return -EFAULT;
152 size -= 8;
153 dst = tlv + 2;
154 list_for_each_entry(fp, &subs->fmt_list, list) {
155 int i, ch_bytes;
156
157 if (!fp->chmap)
158 continue;
159 if (have_dup_chmap(subs, fp))
160 continue;
161 /* copy the entry */
162 ch_bytes = fp->chmap->channels * 4;
163 if (size < 8 + ch_bytes)
164 return -ENOMEM;
165 if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
166 put_user(ch_bytes, dst + 1))
167 return -EFAULT;
168 dst += 2;
169 for (i = 0; i < fp->chmap->channels; i++, dst++) {
170 if (put_user(fp->chmap->map[i], dst))
171 return -EFAULT;
172 }
173
174 count += 8 + ch_bytes;
175 size -= 8 + ch_bytes;
176 }
177 if (put_user(count, tlv + 1))
178 return -EFAULT;
179 return 0;
180}
181
182static int usb_chmap_ctl_get(struct snd_kcontrol *kcontrol,
183 struct snd_ctl_elem_value *ucontrol)
184{
185 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
186 struct snd_usb_substream *subs = info->private_data;
187 struct snd_pcm_chmap_elem *chmap = NULL;
188 int i;
189
190 memset(ucontrol->value.integer.value, 0,
191 sizeof(ucontrol->value.integer.value));
192 if (subs->cur_audiofmt)
193 chmap = subs->cur_audiofmt->chmap;
194 if (chmap) {
195 for (i = 0; i < chmap->channels; i++)
196 ucontrol->value.integer.value[i] = chmap->map[i];
197 }
198 return 0;
199}
200
201/* create a chmap kctl assigned to the given USB substream */
202static int add_chmap(struct snd_pcm *pcm, int stream,
203 struct snd_usb_substream *subs)
204{
205 struct audioformat *fp;
206 struct snd_pcm_chmap *chmap;
207 struct snd_kcontrol *kctl;
208 int err;
209
210 list_for_each_entry(fp, &subs->fmt_list, list)
211 if (fp->chmap)
212 goto ok;
213 /* no chmap is found */
214 return 0;
215
216 ok:
217 err = snd_pcm_add_chmap_ctls(pcm, stream, NULL, 0, 0, &chmap);
218 if (err < 0)
219 return err;
220
221 /* override handlers */
222 chmap->private_data = subs;
223 kctl = chmap->kctl;
224 kctl->info = usb_chmap_ctl_info;
225 kctl->get = usb_chmap_ctl_get;
226 kctl->tlv.c = usb_chmap_ctl_tlv;
227
228 return 0;
229}
230
231/* convert from USB ChannelConfig bits to ALSA chmap element */
232static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
233 int protocol)
234{
235 static unsigned int uac1_maps[] = {
236 SNDRV_CHMAP_FL, /* left front */
237 SNDRV_CHMAP_FR, /* right front */
238 SNDRV_CHMAP_FC, /* center front */
239 SNDRV_CHMAP_LFE, /* LFE */
240 SNDRV_CHMAP_SL, /* left surround */
241 SNDRV_CHMAP_SR, /* right surround */
242 SNDRV_CHMAP_FLC, /* left of center */
243 SNDRV_CHMAP_FRC, /* right of center */
244 SNDRV_CHMAP_RC, /* surround */
245 SNDRV_CHMAP_SL, /* side left */
246 SNDRV_CHMAP_SR, /* side right */
247 SNDRV_CHMAP_TC, /* top */
248 0 /* terminator */
249 };
250 static unsigned int uac2_maps[] = {
251 SNDRV_CHMAP_FL, /* front left */
252 SNDRV_CHMAP_FR, /* front right */
253 SNDRV_CHMAP_FC, /* front center */
254 SNDRV_CHMAP_LFE, /* LFE */
255 SNDRV_CHMAP_RL, /* back left */
256 SNDRV_CHMAP_RR, /* back right */
257 SNDRV_CHMAP_FLC, /* front left of center */
258 SNDRV_CHMAP_FRC, /* front right of center */
259 SNDRV_CHMAP_RC, /* back center */
260 SNDRV_CHMAP_SL, /* side left */
261 SNDRV_CHMAP_SR, /* side right */
262 SNDRV_CHMAP_TC, /* top center */
263 SNDRV_CHMAP_TFL, /* top front left */
264 SNDRV_CHMAP_TFC, /* top front center */
265 SNDRV_CHMAP_TFR, /* top front right */
266 SNDRV_CHMAP_TRL, /* top back left */
267 SNDRV_CHMAP_TRC, /* top back center */
268 SNDRV_CHMAP_TRR, /* top back right */
269 SNDRV_CHMAP_TFLC, /* top front left of center */
270 SNDRV_CHMAP_TFRC, /* top front right of center */
271 SNDRV_CHMAP_LLFE, /* left LFE */
272 SNDRV_CHMAP_RLFE, /* right LFE */
273 SNDRV_CHMAP_TSL, /* top side left */
274 SNDRV_CHMAP_TSR, /* top side right */
275 SNDRV_CHMAP_BC, /* bottom center */
276 SNDRV_CHMAP_RLC, /* back left of center */
277 SNDRV_CHMAP_RRC, /* back right of center */
278 0 /* terminator */
279 };
280 struct snd_pcm_chmap_elem *chmap;
281 const unsigned int *maps;
282 int c;
283
284 if (channels > ARRAY_SIZE(chmap->map))
285 return NULL;
286
287 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
288 if (!chmap)
289 return NULL;
290
291 maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
292 chmap->channels = channels;
293 c = 0;
294
295 if (bits) {
296 for (; bits && *maps; maps++, bits >>= 1)
297 if (bits & 1)
298 chmap->map[c++] = *maps;
299 } else {
300 /* If we're missing wChannelConfig, then guess something
301 to make sure the channel map is not skipped entirely */
302 if (channels == 1)
303 chmap->map[c++] = SNDRV_CHMAP_MONO;
304 else
305 for (; c < channels && *maps; maps++)
306 chmap->map[c++] = *maps;
307 }
308
309 for (; c < channels; c++)
310 chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
311
312 return chmap;
313}
314
315/* UAC3 device stores channels information in Cluster Descriptors */
316static struct
317snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
318 *cluster)
319{
320 unsigned int channels = cluster->bNrChannels;
321 struct snd_pcm_chmap_elem *chmap;
322 void *p = cluster;
323 int len, c;
324
325 if (channels > ARRAY_SIZE(chmap->map))
326 return NULL;
327
328 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
329 if (!chmap)
330 return NULL;
331
332 len = le16_to_cpu(cluster->wLength);
333 c = 0;
334 p += sizeof(struct uac3_cluster_header_descriptor);
335
336 while (((p - (void *)cluster) < len) && (c < channels)) {
337 struct uac3_cluster_segment_descriptor *cs_desc = p;
338 u16 cs_len;
339 u8 cs_type;
340
341 cs_len = le16_to_cpu(cs_desc->wLength);
342 cs_type = cs_desc->bSegmentType;
343
344 if (cs_type == UAC3_CHANNEL_INFORMATION) {
345 struct uac3_cluster_information_segment_descriptor *is = p;
346 unsigned char map;
347
348 /*
349 * TODO: this conversion is not complete, update it
350 * after adding UAC3 values to asound.h
351 */
352 switch (is->bChRelationship) {
353 case UAC3_CH_MONO:
354 map = SNDRV_CHMAP_MONO;
355 break;
356 case UAC3_CH_LEFT:
357 case UAC3_CH_FRONT_LEFT:
358 case UAC3_CH_HEADPHONE_LEFT:
359 map = SNDRV_CHMAP_FL;
360 break;
361 case UAC3_CH_RIGHT:
362 case UAC3_CH_FRONT_RIGHT:
363 case UAC3_CH_HEADPHONE_RIGHT:
364 map = SNDRV_CHMAP_FR;
365 break;
366 case UAC3_CH_FRONT_CENTER:
367 map = SNDRV_CHMAP_FC;
368 break;
369 case UAC3_CH_FRONT_LEFT_OF_CENTER:
370 map = SNDRV_CHMAP_FLC;
371 break;
372 case UAC3_CH_FRONT_RIGHT_OF_CENTER:
373 map = SNDRV_CHMAP_FRC;
374 break;
375 case UAC3_CH_SIDE_LEFT:
376 map = SNDRV_CHMAP_SL;
377 break;
378 case UAC3_CH_SIDE_RIGHT:
379 map = SNDRV_CHMAP_SR;
380 break;
381 case UAC3_CH_BACK_LEFT:
382 map = SNDRV_CHMAP_RL;
383 break;
384 case UAC3_CH_BACK_RIGHT:
385 map = SNDRV_CHMAP_RR;
386 break;
387 case UAC3_CH_BACK_CENTER:
388 map = SNDRV_CHMAP_RC;
389 break;
390 case UAC3_CH_BACK_LEFT_OF_CENTER:
391 map = SNDRV_CHMAP_RLC;
392 break;
393 case UAC3_CH_BACK_RIGHT_OF_CENTER:
394 map = SNDRV_CHMAP_RRC;
395 break;
396 case UAC3_CH_TOP_CENTER:
397 map = SNDRV_CHMAP_TC;
398 break;
399 case UAC3_CH_TOP_FRONT_LEFT:
400 map = SNDRV_CHMAP_TFL;
401 break;
402 case UAC3_CH_TOP_FRONT_RIGHT:
403 map = SNDRV_CHMAP_TFR;
404 break;
405 case UAC3_CH_TOP_FRONT_CENTER:
406 map = SNDRV_CHMAP_TFC;
407 break;
408 case UAC3_CH_TOP_FRONT_LOC:
409 map = SNDRV_CHMAP_TFLC;
410 break;
411 case UAC3_CH_TOP_FRONT_ROC:
412 map = SNDRV_CHMAP_TFRC;
413 break;
414 case UAC3_CH_TOP_SIDE_LEFT:
415 map = SNDRV_CHMAP_TSL;
416 break;
417 case UAC3_CH_TOP_SIDE_RIGHT:
418 map = SNDRV_CHMAP_TSR;
419 break;
420 case UAC3_CH_TOP_BACK_LEFT:
421 map = SNDRV_CHMAP_TRL;
422 break;
423 case UAC3_CH_TOP_BACK_RIGHT:
424 map = SNDRV_CHMAP_TRR;
425 break;
426 case UAC3_CH_TOP_BACK_CENTER:
427 map = SNDRV_CHMAP_TRC;
428 break;
429 case UAC3_CH_BOTTOM_CENTER:
430 map = SNDRV_CHMAP_BC;
431 break;
432 case UAC3_CH_LOW_FREQUENCY_EFFECTS:
433 map = SNDRV_CHMAP_LFE;
434 break;
435 case UAC3_CH_LFE_LEFT:
436 map = SNDRV_CHMAP_LLFE;
437 break;
438 case UAC3_CH_LFE_RIGHT:
439 map = SNDRV_CHMAP_RLFE;
440 break;
441 case UAC3_CH_RELATIONSHIP_UNDEFINED:
442 default:
443 map = SNDRV_CHMAP_UNKNOWN;
444 break;
445 }
446 chmap->map[c++] = map;
447 }
448 p += cs_len;
449 }
450
451 if (channels < c)
452 pr_err("%s: channel number mismatch\n", __func__);
453
454 chmap->channels = channels;
455
456 for (; c < channels; c++)
457 chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
458
459 return chmap;
460}
461
462/*
463 * add this endpoint to the chip instance.
464 * if a stream with the same endpoint already exists, append to it.
465 * if not, create a new pcm stream. note, fp is added to the substream
466 * fmt_list and will be freed on the chip instance release. do not free
467 * fp or do remove it from the substream fmt_list to avoid double-free.
468 */
469int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
470 int stream,
471 struct audioformat *fp)
472{
473 struct snd_usb_stream *as;
474 struct snd_usb_substream *subs;
475 struct snd_pcm *pcm;
476 int err;
477
478 list_for_each_entry(as, &chip->pcm_list, list) {
479 if (as->fmt_type != fp->fmt_type)
480 continue;
481 subs = &as->substream[stream];
482 if (subs->ep_num == fp->endpoint) {
483 list_add_tail(&fp->list, &subs->fmt_list);
484 subs->num_formats++;
485 subs->formats |= fp->formats;
486 return 0;
487 }
488 }
489 /* look for an empty stream */
490 list_for_each_entry(as, &chip->pcm_list, list) {
491 if (as->fmt_type != fp->fmt_type)
492 continue;
493 subs = &as->substream[stream];
494 if (subs->ep_num)
495 continue;
496 err = snd_pcm_new_stream(as->pcm, stream, 1);
497 if (err < 0)
498 return err;
499 snd_usb_init_substream(as, stream, fp);
500 return add_chmap(as->pcm, stream, subs);
501 }
502
503 /* create a new pcm */
504 as = kzalloc(sizeof(*as), GFP_KERNEL);
505 if (!as)
506 return -ENOMEM;
507 as->pcm_index = chip->pcm_devs;
508 as->chip = chip;
509 as->fmt_type = fp->fmt_type;
510 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
511 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
512 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
513 &pcm);
514 if (err < 0) {
515 kfree(as);
516 return err;
517 }
518 as->pcm = pcm;
519 pcm->private_data = as;
520 pcm->private_free = snd_usb_audio_pcm_free;
521 pcm->info_flags = 0;
522 if (chip->pcm_devs > 0)
523 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
524 else
525 strcpy(pcm->name, "USB Audio");
526
527 snd_usb_init_substream(as, stream, fp);
528
529 /*
530 * Keep using head insertion for M-Audio Audiophile USB (tm) which has a
531 * fix to swap capture stream order in conf/cards/USB-audio.conf
532 */
533 if (chip->usb_id == USB_ID(0x0763, 0x2003))
534 list_add(&as->list, &chip->pcm_list);
535 else
536 list_add_tail(&as->list, &chip->pcm_list);
537
538 chip->pcm_devs++;
539
540 snd_usb_proc_pcm_format_add(as);
541
542 return add_chmap(pcm, stream, &as->substream[stream]);
543}
544
545static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
546 struct usb_host_interface *alts,
547 int protocol, int iface_no)
548{
549 /* parsed with a v1 header here. that's ok as we only look at the
550 * header first which is the same for both versions */
551 struct uac_iso_endpoint_descriptor *csep;
552 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
553 int attributes = 0;
554
555 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
556
557 /* Creamware Noah has this descriptor after the 2nd endpoint */
558 if (!csep && altsd->bNumEndpoints >= 2)
559 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
560
561 /*
562 * If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra
563 * bytes after the first endpoint, go search the entire interface.
564 * Some devices have it directly *before* the standard endpoint.
565 */
566 if (!csep)
567 csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT);
568
569 if (!csep || csep->bLength < 7 ||
570 csep->bDescriptorSubtype != UAC_EP_GENERAL) {
571 usb_audio_warn(chip,
572 "%u:%d : no or invalid class specific endpoint descriptor\n",
573 iface_no, altsd->bAlternateSetting);
574 return 0;
575 }
576
577 if (protocol == UAC_VERSION_1) {
578 attributes = csep->bmAttributes;
579 } else if (protocol == UAC_VERSION_2) {
580 struct uac2_iso_endpoint_descriptor *csep2 =
581 (struct uac2_iso_endpoint_descriptor *) csep;
582
583 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
584
585 /* emulate the endpoint attributes of a v1 device */
586 if (csep2->bmControls & UAC2_CONTROL_PITCH)
587 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
588 } else { /* UAC_VERSION_3 */
589 struct uac3_iso_endpoint_descriptor *csep3 =
590 (struct uac3_iso_endpoint_descriptor *) csep;
591
592 /* emulate the endpoint attributes of a v1 device */
593 if (le32_to_cpu(csep3->bmControls) & UAC2_CONTROL_PITCH)
594 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
595 }
596
597 return attributes;
598}
599
600/* find an input terminal descriptor (either UAC1 or UAC2) with the given
601 * terminal id
602 */
603static void *
604snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
605 int terminal_id)
606{
607 struct uac2_input_terminal_descriptor *term = NULL;
608
609 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
610 ctrl_iface->extralen,
611 term, UAC_INPUT_TERMINAL))) {
612 if (term->bTerminalID == terminal_id)
613 return term;
614 }
615
616 return NULL;
617}
618
619static void *
620snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
621 int terminal_id)
622{
623 /* OK to use with both UAC2 and UAC3 */
624 struct uac2_output_terminal_descriptor *term = NULL;
625
626 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
627 ctrl_iface->extralen,
628 term, UAC_OUTPUT_TERMINAL))) {
629 if (term->bTerminalID == terminal_id)
630 return term;
631 }
632
633 return NULL;
634}
635
636int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
637{
638 struct usb_device *dev;
639 struct usb_interface *iface;
640 struct usb_host_interface *alts;
641 struct usb_interface_descriptor *altsd;
642 int i, altno, err, stream;
643 u64 format = 0;
644 unsigned int num_channels = 0;
645 struct audioformat *fp = NULL;
646 int num, protocol, clock = 0;
647 struct uac_format_type_i_continuous_descriptor *fmt = NULL;
648 struct snd_pcm_chmap_elem *chmap_v3 = NULL;
649 unsigned int chconfig;
650
651 dev = chip->dev;
652
653 /* parse the interface's altsettings */
654 iface = usb_ifnum_to_if(dev, iface_no);
655
656 num = iface->num_altsetting;
657
658 /*
659 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
660 * one misses syncpipe, and does not produce any sound.
661 */
662 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
663 num = 4;
664
665 for (i = 0; i < num; i++) {
666 alts = &iface->altsetting[i];
667 altsd = get_iface_desc(alts);
668 protocol = altsd->bInterfaceProtocol;
669 /* skip invalid one */
670 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
671 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
672 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
673 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
674 altsd->bNumEndpoints < 1 ||
675 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
676 continue;
677 /* must be isochronous */
678 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
679 USB_ENDPOINT_XFER_ISOC)
680 continue;
681 /* check direction */
682 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
683 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
684 altno = altsd->bAlternateSetting;
685
686 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
687 continue;
688
689 /*
690 * Roland audio streaming interfaces are marked with protocols
691 * 0/1/2, but are UAC 1 compatible.
692 */
693 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
694 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
695 protocol <= 2)
696 protocol = UAC_VERSION_1;
697
698 chconfig = 0;
699 /* get audio formats */
700 switch (protocol) {
701 default:
702 dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n",
703 iface_no, altno, protocol);
704 protocol = UAC_VERSION_1;
705 /* fall through */
706
707 case UAC_VERSION_1: {
708 struct uac1_as_header_descriptor *as =
709 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
710 struct uac_input_terminal_descriptor *iterm;
711
712 if (!as) {
713 dev_err(&dev->dev,
714 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
715 iface_no, altno);
716 continue;
717 }
718
719 if (as->bLength < sizeof(*as)) {
720 dev_err(&dev->dev,
721 "%u:%d : invalid UAC_AS_GENERAL desc\n",
722 iface_no, altno);
723 continue;
724 }
725
726 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
727
728 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
729 as->bTerminalLink);
730 if (iterm) {
731 num_channels = iterm->bNrChannels;
732 chconfig = le16_to_cpu(iterm->wChannelConfig);
733 }
734
735 break;
736 }
737
738 case UAC_VERSION_2: {
739 struct uac2_input_terminal_descriptor *input_term;
740 struct uac2_output_terminal_descriptor *output_term;
741 struct uac2_as_header_descriptor *as =
742 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
743
744 if (!as) {
745 dev_err(&dev->dev,
746 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
747 iface_no, altno);
748 continue;
749 }
750
751 if (as->bLength < sizeof(*as)) {
752 dev_err(&dev->dev,
753 "%u:%d : invalid UAC_AS_GENERAL desc\n",
754 iface_no, altno);
755 continue;
756 }
757
758 num_channels = as->bNrChannels;
759 format = le32_to_cpu(as->bmFormats);
760 chconfig = le32_to_cpu(as->bmChannelConfig);
761
762 /* lookup the terminal associated to this interface
763 * to extract the clock */
764 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
765 as->bTerminalLink);
766 if (input_term) {
767 clock = input_term->bCSourceID;
768 if (!chconfig && (num_channels == input_term->bNrChannels))
769 chconfig = le32_to_cpu(input_term->bmChannelConfig);
770 break;
771 }
772
773 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
774 as->bTerminalLink);
775 if (output_term) {
776 clock = output_term->bCSourceID;
777 break;
778 }
779
780 dev_err(&dev->dev,
781 "%u:%d : bogus bTerminalLink %d\n",
782 iface_no, altno, as->bTerminalLink);
783 continue;
784 }
785
786 case UAC_VERSION_3: {
787 struct uac3_input_terminal_descriptor *input_term;
788 struct uac3_output_terminal_descriptor *output_term;
789 struct uac3_as_header_descriptor *as;
790 struct uac3_cluster_header_descriptor *cluster;
791 struct uac3_hc_descriptor_header hc_header;
792 u16 cluster_id, wLength;
793
794 as = snd_usb_find_csint_desc(alts->extra,
795 alts->extralen,
796 NULL, UAC_AS_GENERAL);
797
798 if (!as) {
799 dev_err(&dev->dev,
800 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
801 iface_no, altno);
802 continue;
803 }
804
805 if (as->bLength < sizeof(*as)) {
806 dev_err(&dev->dev,
807 "%u:%d : invalid UAC_AS_GENERAL desc\n",
808 iface_no, altno);
809 continue;
810 }
811
812 cluster_id = le16_to_cpu(as->wClusterDescrID);
813 if (!cluster_id) {
814 dev_err(&dev->dev,
815 "%u:%d : no cluster descriptor\n",
816 iface_no, altno);
817 continue;
818 }
819
820 /*
821 * Get number of channels and channel map through
822 * High Capability Cluster Descriptor
823 *
824 * First step: get High Capability header and
825 * read size of Cluster Descriptor
826 */
827 err = snd_usb_ctl_msg(chip->dev,
828 usb_rcvctrlpipe(chip->dev, 0),
829 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
830 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
831 cluster_id,
832 snd_usb_ctrl_intf(chip),
833 &hc_header, sizeof(hc_header));
834 if (err < 0)
835 return err;
836 else if (err != sizeof(hc_header)) {
837 dev_err(&dev->dev,
838 "%u:%d : can't get High Capability descriptor\n",
839 iface_no, altno);
840 return -EIO;
841 }
842
843 /*
844 * Second step: allocate needed amount of memory
845 * and request Cluster Descriptor
846 */
847 wLength = le16_to_cpu(hc_header.wLength);
848 cluster = kzalloc(wLength, GFP_KERNEL);
849 if (!cluster)
850 return -ENOMEM;
851 err = snd_usb_ctl_msg(chip->dev,
852 usb_rcvctrlpipe(chip->dev, 0),
853 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
854 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
855 cluster_id,
856 snd_usb_ctrl_intf(chip),
857 cluster, wLength);
858 if (err < 0) {
859 kfree(cluster);
860 return err;
861 } else if (err != wLength) {
862 dev_err(&dev->dev,
863 "%u:%d : can't get Cluster Descriptor\n",
864 iface_no, altno);
865 kfree(cluster);
866 return -EIO;
867 }
868
869 num_channels = cluster->bNrChannels;
870 chmap_v3 = convert_chmap_v3(cluster);
871
872 kfree(cluster);
873
874 format = le64_to_cpu(as->bmFormats);
875
876 /* lookup the terminal associated to this interface
877 * to extract the clock */
878 input_term = snd_usb_find_input_terminal_descriptor(
879 chip->ctrl_intf,
880 as->bTerminalLink);
881
882 if (input_term) {
883 clock = input_term->bCSourceID;
884 break;
885 }
886
887 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
888 as->bTerminalLink);
889 if (output_term) {
890 clock = output_term->bCSourceID;
891 break;
892 }
893
894 dev_err(&dev->dev,
895 "%u:%d : bogus bTerminalLink %d\n",
896 iface_no, altno, as->bTerminalLink);
897 continue;
898 }
899 }
900
901 if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
902 /* get format type */
903 fmt = snd_usb_find_csint_desc(alts->extra,
904 alts->extralen,
905 NULL, UAC_FORMAT_TYPE);
906 if (!fmt) {
907 dev_err(&dev->dev,
908 "%u:%d : no UAC_FORMAT_TYPE desc\n",
909 iface_no, altno);
910 continue;
911 }
912 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
913 || ((protocol == UAC_VERSION_2) &&
914 (fmt->bLength < 6))) {
915 dev_err(&dev->dev,
916 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
917 iface_no, altno);
918 continue;
919 }
920
921 /*
922 * Blue Microphones workaround: The last altsetting is
923 * identical with the previous one, except for a larger
924 * packet size, but is actually a mislabeled two-channel
925 * setting; ignore it.
926 */
927 if (fmt->bNrChannels == 1 &&
928 fmt->bSubframeSize == 2 &&
929 altno == 2 && num == 3 &&
930 fp && fp->altsetting == 1 && fp->channels == 1 &&
931 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
932 protocol == UAC_VERSION_1 &&
933 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
934 fp->maxpacksize * 2)
935 continue;
936 }
937
938 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
939 if (!fp)
940 return -ENOMEM;
941
942 fp->iface = iface_no;
943 fp->altsetting = altno;
944 fp->altset_idx = i;
945 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
946 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
947 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
948 fp->protocol = protocol;
949 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
950 fp->channels = num_channels;
951 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
952 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
953 * (fp->maxpacksize & 0x7ff);
954 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
955 fp->clock = clock;
956 INIT_LIST_HEAD(&fp->list);
957
958 /* some quirks for attributes here */
959 snd_usb_audioformat_attributes_quirk(chip, fp, stream);
960
961 /* ok, let's parse further... */
962 if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
963 if (snd_usb_parse_audio_format(chip, fp, format,
964 fmt, stream) < 0) {
965 kfree(fp->rate_table);
966 kfree(fp);
967 fp = NULL;
968 continue;
969 }
970 } else {
971 struct uac3_as_header_descriptor *as;
972
973 as = snd_usb_find_csint_desc(alts->extra,
974 alts->extralen,
975 NULL, UAC_AS_GENERAL);
976
977 if (snd_usb_parse_audio_format_v3(chip, fp, as,
978 stream) < 0) {
979 kfree(fp->rate_table);
980 kfree(fp);
981 fp = NULL;
982 continue;
983 }
984 }
985
986 /* Create chmap */
987 if (fp->channels != num_channels)
988 chconfig = 0;
989
990 if (protocol == UAC_VERSION_3)
991 fp->chmap = chmap_v3;
992 else
993 fp->chmap = convert_chmap(fp->channels, chconfig,
994 protocol);
995
996 dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
997 err = snd_usb_add_audio_stream(chip, stream, fp);
998 if (err < 0) {
999 list_del(&fp->list); /* unlink for avoiding double-free */
1000 kfree(fp->rate_table);
1001 kfree(fp->chmap);
1002 kfree(fp);
1003 return err;
1004 }
1005 /* try to set the interface... */
1006 usb_set_interface(chip->dev, iface_no, altno);
1007 snd_usb_init_pitch(chip, iface_no, alts, fp);
1008 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
1009 }
1010 return 0;
1011}
1012
1// SPDX-License-Identifier: GPL-2.0-or-later
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
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
39/*
40 * free a substream
41 */
42static void free_substream(struct snd_usb_substream *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->fmt_list, list)
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 */
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
75/*
76 * initialize the substream instance.
77 */
78
79static void snd_usb_init_substream(struct snd_usb_stream *as,
80 int stream,
81 struct audioformat *fp,
82 struct snd_usb_power_domain *pd)
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;
92 subs->txfr_quirk = !!(as->chip->quirk_flags & QUIRK_FLAG_ALIGN_TRANSFER);
93 subs->tx_length_quirk = !!(as->chip->quirk_flags & QUIRK_FLAG_TX_LENGTH);
94 subs->speed = snd_usb_get_speed(subs->dev);
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_list);
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->channels;
107
108 if (pd) {
109 subs->str_pd = pd;
110 /* Initialize Power Domain to idle status D1 */
111 snd_usb_power_domain_set(subs->stream->chip, pd,
112 UAC3_PD_STATE_D1);
113 }
114
115 snd_usb_preallocate_buffer(subs);
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{
136 struct audioformat *prev = fp;
137
138 list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
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;
195 int i = 0;
196
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 }
203 for (; i < subs->channels_max; i++)
204 ucontrol->value.integer.value[i] = 0;
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{
242 static const unsigned int uac1_maps[] = {
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 };
257 static const unsigned int uac2_maps[] = {
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 */
283 SNDRV_CHMAP_RLC, /* back left of center */
284 SNDRV_CHMAP_RRC, /* back right of center */
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_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;
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;
314 }
315
316 for (; c < channels; c++)
317 chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
318
319 return chmap;
320}
321
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 */
359 switch (is->bChRelationship) {
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
469/*
470 * add this endpoint to the chip instance.
471 * if a stream with the same endpoint already exists, append to it.
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.
475 */
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
481{
482 struct snd_usb_stream *as;
483 struct snd_usb_substream *subs;
484 struct snd_pcm *pcm;
485 int err;
486
487 list_for_each_entry(as, &chip->pcm_list, list) {
488 if (as->fmt_type != fp->fmt_type)
489 continue;
490 subs = &as->substream[stream];
491 if (subs->ep_num == fp->endpoint) {
492 list_add_tail(&fp->list, &subs->fmt_list);
493 subs->num_formats++;
494 subs->formats |= fp->formats;
495 return 0;
496 }
497 }
498
499 if (chip->card->registered)
500 chip->need_delayed_register = true;
501
502 /* look for an empty stream */
503 list_for_each_entry(as, &chip->pcm_list, list) {
504 if (as->fmt_type != fp->fmt_type)
505 continue;
506 subs = &as->substream[stream];
507 if (subs->ep_num)
508 continue;
509 err = snd_pcm_new_stream(as->pcm, stream, 1);
510 if (err < 0)
511 return err;
512 snd_usb_init_substream(as, stream, fp, pd);
513 return add_chmap(as->pcm, stream, subs);
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
540 snd_usb_init_substream(as, stream, fp, pd);
541
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
551 chip->pcm_devs++;
552
553 snd_usb_proc_pcm_format_add(as);
554
555 return add_chmap(pcm, stream, &as->substream[stream]);
556}
557
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
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
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
597 if (!csep || csep->bLength < 7 ||
598 csep->bDescriptorSubtype != UAC_EP_GENERAL)
599 goto error;
600
601 if (protocol == UAC_VERSION_1) {
602 attributes = csep->bmAttributes;
603 } else if (protocol == UAC_VERSION_2) {
604 struct uac2_iso_endpoint_descriptor *csep2 =
605 (struct uac2_iso_endpoint_descriptor *) csep;
606
607 if (csep2->bLength < sizeof(*csep2))
608 goto error;
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;
614 } else { /* UAC_VERSION_3 */
615 struct uac3_iso_endpoint_descriptor *csep3 =
616 (struct uac3_iso_endpoint_descriptor *) csep;
617
618 if (csep3->bLength < sizeof(*csep3))
619 goto error;
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;
623 }
624
625 return attributes;
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;
632}
633
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,
639 int terminal_id, int protocol)
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))) {
646 if (!snd_usb_validate_audio_desc(term, protocol))
647 continue;
648 if (term->bTerminalID == terminal_id)
649 return term;
650 }
651
652 return NULL;
653}
654
655static void *
656snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
657 int terminal_id, int protocol)
658{
659 /* OK to use with both UAC2 and UAC3 */
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))) {
665 if (!snd_usb_validate_audio_desc(term, protocol))
666 continue;
667 if (term->bTerminalID == terminal_id)
668 return term;
669 }
670
671 return NULL;
672}
673
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
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,
741 as->bTerminalLink,
742 protocol);
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,
777 as->bTerminalLink,
778 protocol);
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,
787 as->bTerminalLink,
788 protocol);
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) {
844 audioformat_free(fp);
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}
856
857static struct audioformat *
858snd_usb_get_audioformat_uac3(struct snd_usb_audio *chip,
859 struct usb_host_interface *alts,
860 struct snd_usb_power_domain **pd_out,
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;
868 struct uac3_as_header_descriptor *as = NULL;
869 struct uac3_hc_descriptor_header hc_header;
870 struct snd_pcm_chmap_elem *chmap;
871 struct snd_usb_power_domain *pd;
872 unsigned char badd_profile;
873 u64 badd_formats = 0;
874 unsigned int num_channels;
875 struct audioformat *fp;
876 u16 cluster_id, wLength;
877 int clock = 0;
878 int err;
879
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
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,
1012 as->bTerminalLink,
1013 UAC_VERSION_3);
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,
1020 as->bTerminalLink,
1021 UAC_VERSION_3);
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);
1029 kfree(chmap);
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);
1035 if (!fp) {
1036 kfree(chmap);
1037 return ERR_PTR(-ENOMEM);
1038 }
1039
1040 fp->chmap = chmap;
1041
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
1053 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
1054 if (!pd) {
1055 audioformat_free(fp);
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
1063 } else {
1064 fp->attributes = parse_uac_endpoint_attributes(chip, alts,
1065 UAC_VERSION_3,
1066 iface_no);
1067
1068 pd = snd_usb_find_power_domain(chip->ctrl_intf,
1069 as->bTerminalLink);
1070
1071 /* ok, let's parse further... */
1072 if (snd_usb_parse_audio_format_v3(chip, fp, as, stream) < 0) {
1073 kfree(pd);
1074 audioformat_free(fp);
1075 return NULL;
1076 }
1077 }
1078
1079 if (pd)
1080 *pd_out = pd;
1081
1082 return fp;
1083}
1084
1085static int __snd_usb_parse_audio_interface(struct snd_usb_audio *chip,
1086 int iface_no,
1087 bool *has_non_pcm, bool non_pcm)
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;
1094 struct audioformat *fp = NULL;
1095 struct snd_usb_power_domain *pd = NULL;
1096 int num, protocol;
1097
1098 dev = chip->dev;
1099
1100 /* parse the interface's altsettings */
1101 iface = usb_ifnum_to_if(dev, iface_no);
1102
1103 num = iface->num_altsetting;
1104
1105 /*
1106 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
1107 * one misses syncpipe, and does not produce any sound.
1108 */
1109 if (chip->usb_id == USB_ID(0x04fa, 0x4201) && num >= 4)
1110 num = 4;
1111
1112 for (i = 0; i < num; i++) {
1113 alts = &iface->altsetting[i];
1114 altsd = get_iface_desc(alts);
1115 protocol = altsd->bInterfaceProtocol;
1116 /* skip invalid one */
1117 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
1118 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
1119 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
1120 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1121 altsd->bNumEndpoints < 1 ||
1122 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
1123 continue;
1124 /* must be isochronous */
1125 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1126 USB_ENDPOINT_XFER_ISOC)
1127 continue;
1128 /* check direction */
1129 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
1130 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
1131 altno = altsd->bAlternateSetting;
1132
1133 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
1134 continue;
1135
1136 /*
1137 * Roland audio streaming interfaces are marked with protocols
1138 * 0/1/2, but are UAC 1 compatible.
1139 */
1140 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
1141 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
1142 protocol <= 2)
1143 protocol = UAC_VERSION_1;
1144
1145 switch (protocol) {
1146 default:
1147 dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n",
1148 iface_no, altno, protocol);
1149 protocol = UAC_VERSION_1;
1150 fallthrough;
1151 case UAC_VERSION_1:
1152 case UAC_VERSION_2: {
1153 int bm_quirk = 0;
1154
1155 /*
1156 * Blue Microphones workaround: The last altsetting is
1157 * identical with the previous one, except for a larger
1158 * packet size, but is actually a mislabeled two-channel
1159 * setting; ignore it.
1160 *
1161 * Part 1: prepare quirk flag
1162 */
1163 if (altno == 2 && num == 3 &&
1164 fp && fp->altsetting == 1 && fp->channels == 1 &&
1165 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
1166 protocol == UAC_VERSION_1 &&
1167 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
1168 fp->maxpacksize * 2)
1169 bm_quirk = 1;
1170
1171 fp = snd_usb_get_audioformat_uac12(chip, alts, protocol,
1172 iface_no, i, altno,
1173 stream, bm_quirk);
1174 break;
1175 }
1176 case UAC_VERSION_3:
1177 fp = snd_usb_get_audioformat_uac3(chip, alts, &pd,
1178 iface_no, i, altno, stream);
1179 break;
1180 }
1181
1182 if (!fp)
1183 continue;
1184 else if (IS_ERR(fp))
1185 return PTR_ERR(fp);
1186
1187 if (fp->fmt_type != UAC_FORMAT_TYPE_I)
1188 *has_non_pcm = true;
1189 if ((fp->fmt_type == UAC_FORMAT_TYPE_I) == non_pcm) {
1190 audioformat_free(fp);
1191 kfree(pd);
1192 fp = NULL;
1193 pd = NULL;
1194 continue;
1195 }
1196
1197 snd_usb_audioformat_set_sync_ep(chip, fp);
1198
1199 dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
1200 if (protocol == UAC_VERSION_3)
1201 err = snd_usb_add_audio_stream_v3(chip, stream, fp, pd);
1202 else
1203 err = snd_usb_add_audio_stream(chip, stream, fp);
1204
1205 if (err < 0) {
1206 audioformat_free(fp);
1207 kfree(pd);
1208 return err;
1209 }
1210
1211 /* add endpoints */
1212 err = snd_usb_add_endpoint(chip, fp->endpoint,
1213 SND_USB_ENDPOINT_TYPE_DATA);
1214 if (err < 0)
1215 return err;
1216
1217 if (fp->sync_ep) {
1218 err = snd_usb_add_endpoint(chip, fp->sync_ep,
1219 fp->implicit_fb ?
1220 SND_USB_ENDPOINT_TYPE_DATA :
1221 SND_USB_ENDPOINT_TYPE_SYNC);
1222 if (err < 0)
1223 return err;
1224 }
1225
1226 /* try to set the interface... */
1227 usb_set_interface(chip->dev, iface_no, 0);
1228 snd_usb_init_pitch(chip, fp);
1229 snd_usb_init_sample_rate(chip, fp, fp->rate_max);
1230 usb_set_interface(chip->dev, iface_no, altno);
1231 }
1232 return 0;
1233}
1234
1235int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
1236{
1237 int err;
1238 bool has_non_pcm = false;
1239
1240 /* parse PCM formats */
1241 err = __snd_usb_parse_audio_interface(chip, iface_no, &has_non_pcm, false);
1242 if (err < 0)
1243 return err;
1244
1245 if (has_non_pcm) {
1246 /* parse non-PCM formats */
1247 err = __snd_usb_parse_audio_interface(chip, iface_no, &has_non_pcm, true);
1248 if (err < 0)
1249 return err;
1250 }
1251
1252 return 0;
1253}
1254