?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
tcp: fix bogus RTT on special retransmission
[linux/fpc-iii.git] / sound / usb / stream.c
blob2fb71be5e100b0973c0993dbb8ed4da3f35c5cf2
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
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/control.h>
27 #include <sound/tlv.h>
28
29 #include "usbaudio.h"
30 #include "card.h"
31 #include "proc.h"
32 #include "quirks.h"
33 #include "endpoint.h"
34 #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 */
43 static void free_substream(struct snd_usb_substream *subs)
44 {
45 struct audioformat *fp, *n;
46
47 if (!subs->num_formats)
48 return; /* not initialized */
49 list_for_each_entry_safe(fp, n, &subs->fmt_list, list) {
50 kfree(fp->rate_table);
51 kfree(fp->chmap);
52 kfree(fp);
53 }
54 kfree(subs->rate_list.list);
55 }
56
57
58 /*
59 * free a usb stream instance
60 */
61 static 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
69 static 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
78 /*
79 * initialize the substream instance.
80 */
81
82 static 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;
95 subs->speed = snd_usb_get_speed(subs->dev);
96 subs->pkt_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
109 /* kctl callbacks for usb-audio channel maps */
110 static 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 */
124 static 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
139 static 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
182 static 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 */
202 static 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 */
232 static 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 /*
316 * add this endpoint to the chip instance.
317 * if a stream with the same endpoint already exists, append to it.
318 * if not, create a new pcm stream.
319 */
320 int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
321 int stream,
322 struct audioformat *fp)
323 {
324 struct snd_usb_stream *as;
325 struct snd_usb_substream *subs;
326 struct snd_pcm *pcm;
327 int err;
328
329 list_for_each_entry(as, &chip->pcm_list, list) {
330 if (as->fmt_type != fp->fmt_type)
331 continue;
332 subs = &as->substream[stream];
333 if (subs->ep_num == fp->endpoint) {
334 list_add_tail(&fp->list, &subs->fmt_list);
335 subs->num_formats++;
336 subs->formats |= fp->formats;
337 return 0;
338 }
339 }
340 /* look for an empty stream */
341 list_for_each_entry(as, &chip->pcm_list, list) {
342 if (as->fmt_type != fp->fmt_type)
343 continue;
344 subs = &as->substream[stream];
345 if (subs->ep_num)
346 continue;
347 err = snd_pcm_new_stream(as->pcm, stream, 1);
348 if (err < 0)
349 return err;
350 snd_usb_init_substream(as, stream, fp);
351 return add_chmap(as->pcm, stream, subs);
352 }
353
354 /* create a new pcm */
355 as = kzalloc(sizeof(*as), GFP_KERNEL);
356 if (!as)
357 return -ENOMEM;
358 as->pcm_index = chip->pcm_devs;
359 as->chip = chip;
360 as->fmt_type = fp->fmt_type;
361 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
362 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
363 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
364 &pcm);
365 if (err < 0) {
366 kfree(as);
367 return err;
368 }
369 as->pcm = pcm;
370 pcm->private_data = as;
371 pcm->private_free = snd_usb_audio_pcm_free;
372 pcm->info_flags = 0;
373 if (chip->pcm_devs > 0)
374 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
375 else
376 strcpy(pcm->name, "USB Audio");
377
378 snd_usb_init_substream(as, stream, fp);
379
380 list_add(&as->list, &chip->pcm_list);
381 chip->pcm_devs++;
382
383 snd_usb_proc_pcm_format_add(as);
384
385 return add_chmap(pcm, stream, &as->substream[stream]);
386 }
387
388 static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
389 struct usb_host_interface *alts,
390 int protocol, int iface_no)
391 {
392 /* parsed with a v1 header here. that's ok as we only look at the
393 * header first which is the same for both versions */
394 struct uac_iso_endpoint_descriptor *csep;
395 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
396 int attributes = 0;
397
398 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
399
400 /* Creamware Noah has this descriptor after the 2nd endpoint */
401 if (!csep && altsd->bNumEndpoints >= 2)
402 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
403
404 /*
405 * If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra
406 * bytes after the first endpoint, go search the entire interface.
407 * Some devices have it directly *before* the standard endpoint.
408 */
409 if (!csep)
410 csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT);
411
412 if (!csep || csep->bLength < 7 ||
413 csep->bDescriptorSubtype != UAC_EP_GENERAL) {
414 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
415 " class specific endpoint descriptor\n",
416 chip->dev->devnum, iface_no,
417 altsd->bAlternateSetting);
418 return 0;
419 }
420
421 if (protocol == UAC_VERSION_1) {
422 attributes = csep->bmAttributes;
423 } else {
424 struct uac2_iso_endpoint_descriptor *csep2 =
425 (struct uac2_iso_endpoint_descriptor *) csep;
426
427 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
428
429 /* emulate the endpoint attributes of a v1 device */
430 if (csep2->bmControls & UAC2_CONTROL_PITCH)
431 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
432 }
433
434 return attributes;
435 }
436
437 /* find an input terminal descriptor (either UAC1 or UAC2) with the given
438 * terminal id
439 */
440 static void *
441 snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
442 int terminal_id)
443 {
444 struct uac2_input_terminal_descriptor *term = NULL;
445
446 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
447 ctrl_iface->extralen,
448 term, UAC_INPUT_TERMINAL))) {
449 if (term->bTerminalID == terminal_id)
450 return term;
451 }
452
453 return NULL;
454 }
455
456 static struct uac2_output_terminal_descriptor *
457 snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
458 int terminal_id)
459 {
460 struct uac2_output_terminal_descriptor *term = NULL;
461
462 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
463 ctrl_iface->extralen,
464 term, UAC_OUTPUT_TERMINAL))) {
465 if (term->bTerminalID == terminal_id)
466 return term;
467 }
468
469 return NULL;
470 }
471
472 int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
473 {
474 struct usb_device *dev;
475 struct usb_interface *iface;
476 struct usb_host_interface *alts;
477 struct usb_interface_descriptor *altsd;
478 int i, altno, err, stream;
479 unsigned int format = 0, num_channels = 0;
480 struct audioformat *fp = NULL;
481 int num, protocol, clock = 0;
482 struct uac_format_type_i_continuous_descriptor *fmt;
483 unsigned int chconfig;
484
485 dev = chip->dev;
486
487 /* parse the interface's altsettings */
488 iface = usb_ifnum_to_if(dev, iface_no);
489
490 num = iface->num_altsetting;
491
492 /*
493 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
494 * one misses syncpipe, and does not produce any sound.
495 */
496 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
497 num = 4;
498
499 for (i = 0; i < num; i++) {
500 alts = &iface->altsetting[i];
501 altsd = get_iface_desc(alts);
502 protocol = altsd->bInterfaceProtocol;
503 /* skip invalid one */
504 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
505 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
506 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
507 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
508 altsd->bNumEndpoints < 1 ||
509 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
510 continue;
511 /* must be isochronous */
512 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
513 USB_ENDPOINT_XFER_ISOC)
514 continue;
515 /* check direction */
516 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
517 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
518 altno = altsd->bAlternateSetting;
519
520 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
521 continue;
522
523 /*
524 * Roland audio streaming interfaces are marked with protocols
525 * 0/1/2, but are UAC 1 compatible.
526 */
527 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
528 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
529 protocol <= 2)
530 protocol = UAC_VERSION_1;
531
532 chconfig = 0;
533 /* get audio formats */
534 switch (protocol) {
535 default:
536 snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n",
537 dev->devnum, iface_no, altno, protocol);
538 protocol = UAC_VERSION_1;
539 /* fall through */
540
541 case UAC_VERSION_1: {
542 struct uac1_as_header_descriptor *as =
543 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
544 struct uac_input_terminal_descriptor *iterm;
545
546 if (!as) {
547 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
548 dev->devnum, iface_no, altno);
549 continue;
550 }
551
552 if (as->bLength < sizeof(*as)) {
553 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
554 dev->devnum, iface_no, altno);
555 continue;
556 }
557
558 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
559
560 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
561 as->bTerminalLink);
562 if (iterm) {
563 num_channels = iterm->bNrChannels;
564 chconfig = le16_to_cpu(iterm->wChannelConfig);
565 }
566
567 break;
568 }
569
570 case UAC_VERSION_2: {
571 struct uac2_input_terminal_descriptor *input_term;
572 struct uac2_output_terminal_descriptor *output_term;
573 struct uac2_as_header_descriptor *as =
574 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
575
576 if (!as) {
577 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
578 dev->devnum, iface_no, altno);
579 continue;
580 }
581
582 if (as->bLength < sizeof(*as)) {
583 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
584 dev->devnum, iface_no, altno);
585 continue;
586 }
587
588 num_channels = as->bNrChannels;
589 format = le32_to_cpu(as->bmFormats);
590 chconfig = le32_to_cpu(as->bmChannelConfig);
591
592 /* lookup the terminal associated to this interface
593 * to extract the clock */
594 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
595 as->bTerminalLink);
596 if (input_term) {
597 clock = input_term->bCSourceID;
598 if (!chconfig && (num_channels == input_term->bNrChannels))
599 chconfig = le32_to_cpu(input_term->bmChannelConfig);
600 break;
601 }
602
603 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
604 as->bTerminalLink);
605 if (output_term) {
606 clock = output_term->bCSourceID;
607 break;
608 }
609
610 snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n",
611 dev->devnum, iface_no, altno, as->bTerminalLink);
612 continue;
613 }
614 }
615
616 /* get format type */
617 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
618 if (!fmt) {
619 snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
620 dev->devnum, iface_no, altno);
621 continue;
622 }
623 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
624 ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
625 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
626 dev->devnum, iface_no, altno);
627 continue;
628 }
629
630 /*
631 * Blue Microphones workaround: The last altsetting is identical
632 * with the previous one, except for a larger packet size, but
633 * is actually a mislabeled two-channel setting; ignore it.
634 */
635 if (fmt->bNrChannels == 1 &&
636 fmt->bSubframeSize == 2 &&
637 altno == 2 && num == 3 &&
638 fp && fp->altsetting == 1 && fp->channels == 1 &&
639 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
640 protocol == UAC_VERSION_1 &&
641 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
642 fp->maxpacksize * 2)
643 continue;
644
645 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
646 if (! fp) {
647 snd_printk(KERN_ERR "cannot malloc\n");
648 return -ENOMEM;
649 }
650
651 fp->iface = iface_no;
652 fp->altsetting = altno;
653 fp->altset_idx = i;
654 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
655 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
656 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
657 fp->protocol = protocol;
658 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
659 fp->channels = num_channels;
660 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
661 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
662 * (fp->maxpacksize & 0x7ff);
663 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
664 fp->clock = clock;
665
666 /* some quirks for attributes here */
667
668 switch (chip->usb_id) {
669 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
670 /* Optoplay sets the sample rate attribute although
671 * it seems not supporting it in fact.
672 */
673 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
674 break;
675 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
676 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
677 /* doesn't set the sample rate attribute, but supports it */
678 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
679 break;
680 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
681 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
682 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
683 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
684 an older model 77d:223) */
685 /*
686 * plantronics headset and Griffin iMic have set adaptive-in
687 * although it's really not...
688 */
689 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
690 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
691 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
692 else
693 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
694 break;
695 }
696
697 /* ok, let's parse further... */
698 if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream) < 0) {
699 kfree(fp->rate_table);
700 kfree(fp);
701 fp = NULL;
702 continue;
703 }
704
705 /* Create chmap */
706 if (fp->channels != num_channels)
707 chconfig = 0;
708 fp->chmap = convert_chmap(fp->channels, chconfig, protocol);
709
710 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
711 err = snd_usb_add_audio_stream(chip, stream, fp);
712 if (err < 0) {
713 kfree(fp->rate_table);
714 kfree(fp->chmap);
715 kfree(fp);
716 return err;
717 }
718 /* try to set the interface... */
719 usb_set_interface(chip->dev, iface_no, altno);
720 snd_usb_init_pitch(chip, iface_no, alts, fp);
721 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
722 }
723 return 0;
724 }
725
Linux with added FPC-III support