blob: c4339f97226bddea9db02c578e6fb5774d1d5a0c [file] [log] [blame]
Daniel Macke8e8bab2011-09-12 18:54:12 +02001/*
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
24#include <sound/core.h>
25#include <sound/pcm.h>
Takashi Iwai04324cc2012-11-26 16:24:02 +010026#include <sound/control.h>
27#include <sound/tlv.h>
Daniel Macke8e8bab2011-09-12 18:54:12 +020028
29#include "usbaudio.h"
30#include "card.h"
31#include "proc.h"
32#include "quirks.h"
33#include "endpoint.h"
Daniel Macke8e8bab2011-09-12 18:54:12 +020034#include "pcm.h"
35#include "helper.h"
36#include "format.h"
37#include "clock.h"
38#include "stream.h"
39
40/*
41 * free a substream
42 */
43static void free_substream(struct snd_usb_substream *subs)
44{
Eldad Zack88766f02013-04-03 23:18:49 +020045 struct audioformat *fp, *n;
Daniel Macke8e8bab2011-09-12 18:54:12 +020046
47 if (!subs->num_formats)
48 return; /* not initialized */
Eldad Zack88766f02013-04-03 23:18:49 +020049 list_for_each_entry_safe(fp, n, &subs->fmt_list, list) {
Daniel Macke8e8bab2011-09-12 18:54:12 +020050 kfree(fp->rate_table);
Takashi Iwai04324cc2012-11-26 16:24:02 +010051 kfree(fp->chmap);
Daniel Macke8e8bab2011-09-12 18:54:12 +020052 kfree(fp);
53 }
54 kfree(subs->rate_list.list);
55}
56
57
58/*
59 * free a usb stream instance
60 */
61static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
62{
63 free_substream(&stream->substream[0]);
64 free_substream(&stream->substream[1]);
65 list_del(&stream->list);
66 kfree(stream);
67}
68
69static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
70{
71 struct snd_usb_stream *stream = pcm->private_data;
72 if (stream) {
73 stream->pcm = NULL;
74 snd_usb_audio_stream_free(stream);
75 }
76}
77
Daniel Mackedcd3632012-04-12 13:51:12 +020078/*
79 * initialize the substream instance.
80 */
81
82static void snd_usb_init_substream(struct snd_usb_stream *as,
83 int stream,
84 struct audioformat *fp)
85{
86 struct snd_usb_substream *subs = &as->substream[stream];
87
88 INIT_LIST_HEAD(&subs->fmt_list);
89 spin_lock_init(&subs->lock);
90
91 subs->stream = as;
92 subs->direction = stream;
93 subs->dev = as->chip->dev;
94 subs->txfr_quirk = as->chip->txfr_quirk;
Takashi Iwai978520b2012-10-12 15:12:55 +020095 subs->speed = snd_usb_get_speed(subs->dev);
Calvin Owens1539d4f2013-04-12 22:33:59 -050096 subs->pkt_offset_adj = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +020097
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;
Takashi Iwai8260ef02012-06-08 09:01:37 +0200104 subs->ep_num = fp->endpoint;
Takashi Iwai04324cc2012-11-26 16:24:02 +0100105 if (fp->channels > subs->channels_max)
106 subs->channels_max = fp->channels;
107}
108
109/* kctl callbacks for usb-audio channel maps */
110static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
111 struct snd_ctl_elem_info *uinfo)
112{
113 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
114 struct snd_usb_substream *subs = info->private_data;
115
116 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
117 uinfo->count = subs->channels_max;
118 uinfo->value.integer.min = 0;
119 uinfo->value.integer.max = SNDRV_CHMAP_LAST;
120 return 0;
121}
122
123/* check whether a duplicated entry exists in the audiofmt list */
124static bool have_dup_chmap(struct snd_usb_substream *subs,
125 struct audioformat *fp)
126{
127 struct list_head *p;
128
129 for (p = fp->list.prev; p != &subs->fmt_list; p = p->prev) {
130 struct audioformat *prev;
131 prev = list_entry(p, struct audioformat, 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_BLC, /* bottom left center */
277 SNDRV_CHMAP_BRC, /* bottom right center */
278 0 /* terminator */
279 };
280 struct snd_pcm_chmap_elem *chmap;
281 const unsigned int *maps;
282 int c;
283
284 if (!bits)
285 return NULL;
286 if (channels > ARRAY_SIZE(chmap->map))
287 return NULL;
288
289 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
290 if (!chmap)
291 return NULL;
292
293 maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
294 chmap->channels = channels;
295 c = 0;
296 for (; bits && *maps; maps++, bits >>= 1) {
297 if (bits & 1)
298 chmap->map[c++] = *maps;
299 }
300
301 for (; c < channels; c++)
302 chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
303
304 return chmap;
Daniel Mackedcd3632012-04-12 13:51:12 +0200305}
Daniel Macke8e8bab2011-09-12 18:54:12 +0200306
307/*
308 * add this endpoint to the chip instance.
309 * if a stream with the same endpoint already exists, append to it.
310 * if not, create a new pcm stream.
311 */
312int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
313 int stream,
314 struct audioformat *fp)
315{
Daniel Macke8e8bab2011-09-12 18:54:12 +0200316 struct snd_usb_stream *as;
317 struct snd_usb_substream *subs;
318 struct snd_pcm *pcm;
319 int err;
320
Eldad Zack88766f02013-04-03 23:18:49 +0200321 list_for_each_entry(as, &chip->pcm_list, list) {
Daniel Macke8e8bab2011-09-12 18:54:12 +0200322 if (as->fmt_type != fp->fmt_type)
323 continue;
324 subs = &as->substream[stream];
Takashi Iwai8260ef02012-06-08 09:01:37 +0200325 if (subs->ep_num == fp->endpoint) {
Daniel Macke8e8bab2011-09-12 18:54:12 +0200326 list_add_tail(&fp->list, &subs->fmt_list);
327 subs->num_formats++;
328 subs->formats |= fp->formats;
329 return 0;
330 }
331 }
332 /* look for an empty stream */
Eldad Zack88766f02013-04-03 23:18:49 +0200333 list_for_each_entry(as, &chip->pcm_list, list) {
Daniel Macke8e8bab2011-09-12 18:54:12 +0200334 if (as->fmt_type != fp->fmt_type)
335 continue;
336 subs = &as->substream[stream];
Takashi Iwai8260ef02012-06-08 09:01:37 +0200337 if (subs->ep_num)
Daniel Macke8e8bab2011-09-12 18:54:12 +0200338 continue;
339 err = snd_pcm_new_stream(as->pcm, stream, 1);
340 if (err < 0)
341 return err;
342 snd_usb_init_substream(as, stream, fp);
Takashi Iwai04324cc2012-11-26 16:24:02 +0100343 return add_chmap(as->pcm, stream, subs);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200344 }
345
346 /* create a new pcm */
347 as = kzalloc(sizeof(*as), GFP_KERNEL);
348 if (!as)
349 return -ENOMEM;
350 as->pcm_index = chip->pcm_devs;
351 as->chip = chip;
352 as->fmt_type = fp->fmt_type;
353 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
354 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
355 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
356 &pcm);
357 if (err < 0) {
358 kfree(as);
359 return err;
360 }
361 as->pcm = pcm;
362 pcm->private_data = as;
363 pcm->private_free = snd_usb_audio_pcm_free;
364 pcm->info_flags = 0;
365 if (chip->pcm_devs > 0)
366 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
367 else
368 strcpy(pcm->name, "USB Audio");
369
370 snd_usb_init_substream(as, stream, fp);
371
372 list_add(&as->list, &chip->pcm_list);
373 chip->pcm_devs++;
374
375 snd_usb_proc_pcm_format_add(as);
376
Takashi Iwai04324cc2012-11-26 16:24:02 +0100377 return add_chmap(pcm, stream, &as->substream[stream]);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200378}
379
380static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
381 struct usb_host_interface *alts,
382 int protocol, int iface_no)
383{
384 /* parsed with a v1 header here. that's ok as we only look at the
385 * header first which is the same for both versions */
386 struct uac_iso_endpoint_descriptor *csep;
387 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
388 int attributes = 0;
389
390 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
391
392 /* Creamware Noah has this descriptor after the 2nd endpoint */
393 if (!csep && altsd->bNumEndpoints >= 2)
394 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
395
Daniel Mackebfc5942013-04-24 19:38:42 +0200396 /*
397 * If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra
398 * bytes after the first endpoint, go search the entire interface.
399 * Some devices have it directly *before* the standard endpoint.
400 */
401 if (!csep)
402 csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT);
403
Daniel Macke8e8bab2011-09-12 18:54:12 +0200404 if (!csep || csep->bLength < 7 ||
405 csep->bDescriptorSubtype != UAC_EP_GENERAL) {
406 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
407 " class specific endpoint descriptor\n",
408 chip->dev->devnum, iface_no,
409 altsd->bAlternateSetting);
410 return 0;
411 }
412
413 if (protocol == UAC_VERSION_1) {
414 attributes = csep->bmAttributes;
415 } else {
416 struct uac2_iso_endpoint_descriptor *csep2 =
417 (struct uac2_iso_endpoint_descriptor *) csep;
418
419 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
420
421 /* emulate the endpoint attributes of a v1 device */
422 if (csep2->bmControls & UAC2_CONTROL_PITCH)
423 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
424 }
425
426 return attributes;
427}
428
Takashi Iwai04324cc2012-11-26 16:24:02 +0100429/* find an input terminal descriptor (either UAC1 or UAC2) with the given
430 * terminal id
431 */
432static void *
433snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
Daniel Macke8e8bab2011-09-12 18:54:12 +0200434 int terminal_id)
435{
436 struct uac2_input_terminal_descriptor *term = NULL;
437
438 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
439 ctrl_iface->extralen,
440 term, UAC_INPUT_TERMINAL))) {
441 if (term->bTerminalID == terminal_id)
442 return term;
443 }
444
445 return NULL;
446}
447
448static struct uac2_output_terminal_descriptor *
449 snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
450 int terminal_id)
451{
452 struct uac2_output_terminal_descriptor *term = NULL;
453
454 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
455 ctrl_iface->extralen,
456 term, UAC_OUTPUT_TERMINAL))) {
457 if (term->bTerminalID == terminal_id)
458 return term;
459 }
460
461 return NULL;
462}
463
464int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
465{
466 struct usb_device *dev;
467 struct usb_interface *iface;
468 struct usb_host_interface *alts;
469 struct usb_interface_descriptor *altsd;
470 int i, altno, err, stream;
Daniel Mack2fcdb062013-03-17 20:07:24 +0800471 unsigned int format = 0, num_channels = 0;
Daniel Macke8e8bab2011-09-12 18:54:12 +0200472 struct audioformat *fp = NULL;
473 int num, protocol, clock = 0;
474 struct uac_format_type_i_continuous_descriptor *fmt;
Takashi Iwai04324cc2012-11-26 16:24:02 +0100475 unsigned int chconfig;
Daniel Macke8e8bab2011-09-12 18:54:12 +0200476
477 dev = chip->dev;
478
479 /* parse the interface's altsettings */
480 iface = usb_ifnum_to_if(dev, iface_no);
481
482 num = iface->num_altsetting;
483
484 /*
485 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
486 * one misses syncpipe, and does not produce any sound.
487 */
488 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
489 num = 4;
490
491 for (i = 0; i < num; i++) {
492 alts = &iface->altsetting[i];
493 altsd = get_iface_desc(alts);
494 protocol = altsd->bInterfaceProtocol;
495 /* skip invalid one */
Clemens Ladischaafe77c2013-03-31 23:43:12 +0200496 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
497 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
498 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
Daniel Macke8e8bab2011-09-12 18:54:12 +0200499 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
Daniel Macke8e8bab2011-09-12 18:54:12 +0200500 altsd->bNumEndpoints < 1 ||
501 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
502 continue;
503 /* must be isochronous */
504 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
505 USB_ENDPOINT_XFER_ISOC)
506 continue;
507 /* check direction */
508 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
509 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
510 altno = altsd->bAlternateSetting;
511
512 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
513 continue;
514
Clemens Ladischaafe77c2013-03-31 23:43:12 +0200515 /*
516 * Roland audio streaming interfaces are marked with protocols
517 * 0/1/2, but are UAC 1 compatible.
518 */
519 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
520 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
521 protocol <= 2)
522 protocol = UAC_VERSION_1;
523
Takashi Iwai04324cc2012-11-26 16:24:02 +0100524 chconfig = 0;
Daniel Macke8e8bab2011-09-12 18:54:12 +0200525 /* get audio formats */
526 switch (protocol) {
527 default:
528 snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n",
529 dev->devnum, iface_no, altno, protocol);
530 protocol = UAC_VERSION_1;
531 /* fall through */
532
533 case UAC_VERSION_1: {
534 struct uac1_as_header_descriptor *as =
535 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
Takashi Iwai04324cc2012-11-26 16:24:02 +0100536 struct uac_input_terminal_descriptor *iterm;
Daniel Macke8e8bab2011-09-12 18:54:12 +0200537
538 if (!as) {
539 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
540 dev->devnum, iface_no, altno);
541 continue;
542 }
543
544 if (as->bLength < sizeof(*as)) {
545 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
546 dev->devnum, iface_no, altno);
547 continue;
548 }
549
550 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
Takashi Iwai04324cc2012-11-26 16:24:02 +0100551
552 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
553 as->bTerminalLink);
554 if (iterm) {
555 num_channels = iterm->bNrChannels;
556 chconfig = le16_to_cpu(iterm->wChannelConfig);
557 }
558
Daniel Macke8e8bab2011-09-12 18:54:12 +0200559 break;
560 }
561
562 case UAC_VERSION_2: {
563 struct uac2_input_terminal_descriptor *input_term;
564 struct uac2_output_terminal_descriptor *output_term;
565 struct uac2_as_header_descriptor *as =
566 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
567
568 if (!as) {
569 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
570 dev->devnum, iface_no, altno);
571 continue;
572 }
573
574 if (as->bLength < sizeof(*as)) {
575 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
576 dev->devnum, iface_no, altno);
577 continue;
578 }
579
580 num_channels = as->bNrChannels;
581 format = le32_to_cpu(as->bmFormats);
582
583 /* lookup the terminal associated to this interface
584 * to extract the clock */
585 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
586 as->bTerminalLink);
587 if (input_term) {
588 clock = input_term->bCSourceID;
Takashi Iwai04324cc2012-11-26 16:24:02 +0100589 chconfig = le32_to_cpu(input_term->bmChannelConfig);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200590 break;
591 }
592
593 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
594 as->bTerminalLink);
595 if (output_term) {
596 clock = output_term->bCSourceID;
597 break;
598 }
599
600 snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n",
601 dev->devnum, iface_no, altno, as->bTerminalLink);
602 continue;
603 }
604 }
605
606 /* get format type */
607 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
608 if (!fmt) {
609 snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
610 dev->devnum, iface_no, altno);
611 continue;
612 }
613 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
614 ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
615 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
616 dev->devnum, iface_no, altno);
617 continue;
618 }
619
620 /*
621 * Blue Microphones workaround: The last altsetting is identical
622 * with the previous one, except for a larger packet size, but
623 * is actually a mislabeled two-channel setting; ignore it.
624 */
625 if (fmt->bNrChannels == 1 &&
626 fmt->bSubframeSize == 2 &&
627 altno == 2 && num == 3 &&
628 fp && fp->altsetting == 1 && fp->channels == 1 &&
629 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
630 protocol == UAC_VERSION_1 &&
631 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
632 fp->maxpacksize * 2)
633 continue;
634
635 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
636 if (! fp) {
637 snd_printk(KERN_ERR "cannot malloc\n");
638 return -ENOMEM;
639 }
640
641 fp->iface = iface_no;
642 fp->altsetting = altno;
643 fp->altset_idx = i;
644 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
645 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
646 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
Clemens Ladisch8f898e92013-01-31 21:39:17 +0100647 fp->protocol = protocol;
Daniel Macke8e8bab2011-09-12 18:54:12 +0200648 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200649 fp->channels = num_channels;
650 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
651 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
652 * (fp->maxpacksize & 0x7ff);
653 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
654 fp->clock = clock;
Takashi Iwai04324cc2012-11-26 16:24:02 +0100655 fp->chmap = convert_chmap(num_channels, chconfig, protocol);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200656
657 /* some quirks for attributes here */
658
659 switch (chip->usb_id) {
660 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
661 /* Optoplay sets the sample rate attribute although
662 * it seems not supporting it in fact.
663 */
664 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
665 break;
666 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
667 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
668 /* doesn't set the sample rate attribute, but supports it */
669 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
670 break;
671 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
672 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
673 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
674 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
675 an older model 77d:223) */
676 /*
677 * plantronics headset and Griffin iMic have set adaptive-in
678 * although it's really not...
679 */
680 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
681 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
682 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
683 else
684 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
685 break;
686 }
687
688 /* ok, let's parse further... */
Clemens Ladisch8f898e92013-01-31 21:39:17 +0100689 if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream) < 0) {
Daniel Macke8e8bab2011-09-12 18:54:12 +0200690 kfree(fp->rate_table);
Takashi Iwai04324cc2012-11-26 16:24:02 +0100691 kfree(fp->chmap);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200692 kfree(fp);
693 fp = NULL;
694 continue;
695 }
696
697 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
698 err = snd_usb_add_audio_stream(chip, stream, fp);
699 if (err < 0) {
700 kfree(fp->rate_table);
Takashi Iwai04324cc2012-11-26 16:24:02 +0100701 kfree(fp->chmap);
Daniel Macke8e8bab2011-09-12 18:54:12 +0200702 kfree(fp);
703 return err;
704 }
705 /* try to set the interface... */
706 usb_set_interface(chip->dev, iface_no, altno);
707 snd_usb_init_pitch(chip, iface_no, alts, fp);
708 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
709 }
710 return 0;
711}
712