xref: /openbmc/linux/sound/usb/quirks.c (revision 2c6467d2)
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 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/usb.h>
20 #include <linux/usb/audio.h>
21 #include <linux/usb/midi.h>
22 #include <linux/bits.h>
23 
24 #include <sound/control.h>
25 #include <sound/core.h>
26 #include <sound/info.h>
27 #include <sound/pcm.h>
28 
29 #include "usbaudio.h"
30 #include "card.h"
31 #include "mixer.h"
32 #include "mixer_quirks.h"
33 #include "midi.h"
34 #include "quirks.h"
35 #include "helper.h"
36 #include "endpoint.h"
37 #include "pcm.h"
38 #include "clock.h"
39 #include "stream.h"
40 
41 /*
42  * handle the quirks for the contained interfaces
43  */
44 static int create_composite_quirk(struct snd_usb_audio *chip,
45 				  struct usb_interface *iface,
46 				  struct usb_driver *driver,
47 				  const struct snd_usb_audio_quirk *quirk_comp)
48 {
49 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
50 	const struct snd_usb_audio_quirk *quirk;
51 	int err;
52 
53 	for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
54 		iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
55 		if (!iface)
56 			continue;
57 		if (quirk->ifnum != probed_ifnum &&
58 		    usb_interface_claimed(iface))
59 			continue;
60 		err = snd_usb_create_quirk(chip, iface, driver, quirk);
61 		if (err < 0)
62 			return err;
63 	}
64 
65 	for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
66 		iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
67 		if (!iface)
68 			continue;
69 		if (quirk->ifnum != probed_ifnum &&
70 		    !usb_interface_claimed(iface))
71 			usb_driver_claim_interface(driver, iface, (void *)-1L);
72 	}
73 
74 	return 0;
75 }
76 
77 static int ignore_interface_quirk(struct snd_usb_audio *chip,
78 				  struct usb_interface *iface,
79 				  struct usb_driver *driver,
80 				  const struct snd_usb_audio_quirk *quirk)
81 {
82 	return 0;
83 }
84 
85 
86 /*
87  * Allow alignment on audio sub-slot (channel samples) rather than
88  * on audio slots (audio frames)
89  */
90 static int create_align_transfer_quirk(struct snd_usb_audio *chip,
91 				       struct usb_interface *iface,
92 				       struct usb_driver *driver,
93 				       const struct snd_usb_audio_quirk *quirk)
94 {
95 	chip->txfr_quirk = 1;
96 	return 1;	/* Continue with creating streams and mixer */
97 }
98 
99 static int create_any_midi_quirk(struct snd_usb_audio *chip,
100 				 struct usb_interface *intf,
101 				 struct usb_driver *driver,
102 				 const struct snd_usb_audio_quirk *quirk)
103 {
104 	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
105 }
106 
107 /*
108  * create a stream for an interface with proper descriptors
109  */
110 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
111 				       struct usb_interface *iface,
112 				       struct usb_driver *driver,
113 				       const struct snd_usb_audio_quirk *quirk)
114 {
115 	struct usb_host_interface *alts;
116 	struct usb_interface_descriptor *altsd;
117 	int err;
118 
119 	if (chip->usb_id == USB_ID(0x1686, 0x00dd)) /* Zoom R16/24 */
120 		chip->tx_length_quirk = 1;
121 
122 	alts = &iface->altsetting[0];
123 	altsd = get_iface_desc(alts);
124 	err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
125 	if (err < 0) {
126 		usb_audio_err(chip, "cannot setup if %d: error %d\n",
127 			   altsd->bInterfaceNumber, err);
128 		return err;
129 	}
130 	/* reset the current interface */
131 	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
132 	return 0;
133 }
134 
135 /*
136  * create a stream for an endpoint/altsetting without proper descriptors
137  */
138 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
139 				     struct usb_interface *iface,
140 				     struct usb_driver *driver,
141 				     const struct snd_usb_audio_quirk *quirk)
142 {
143 	struct audioformat *fp;
144 	struct usb_host_interface *alts;
145 	struct usb_interface_descriptor *altsd;
146 	int stream, err;
147 	unsigned *rate_table = NULL;
148 
149 	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
150 	if (!fp)
151 		return -ENOMEM;
152 
153 	INIT_LIST_HEAD(&fp->list);
154 	if (fp->nr_rates > MAX_NR_RATES) {
155 		kfree(fp);
156 		return -EINVAL;
157 	}
158 	if (fp->nr_rates > 0) {
159 		rate_table = kmemdup(fp->rate_table,
160 				     sizeof(int) * fp->nr_rates, GFP_KERNEL);
161 		if (!rate_table) {
162 			kfree(fp);
163 			return -ENOMEM;
164 		}
165 		fp->rate_table = rate_table;
166 	}
167 
168 	stream = (fp->endpoint & USB_DIR_IN)
169 		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
170 	err = snd_usb_add_audio_stream(chip, stream, fp);
171 	if (err < 0)
172 		goto error;
173 	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
174 	    fp->altset_idx >= iface->num_altsetting) {
175 		err = -EINVAL;
176 		goto error;
177 	}
178 	alts = &iface->altsetting[fp->altset_idx];
179 	altsd = get_iface_desc(alts);
180 	if (altsd->bNumEndpoints < 1) {
181 		err = -EINVAL;
182 		goto error;
183 	}
184 
185 	fp->protocol = altsd->bInterfaceProtocol;
186 
187 	if (fp->datainterval == 0)
188 		fp->datainterval = snd_usb_parse_datainterval(chip, alts);
189 	if (fp->maxpacksize == 0)
190 		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
191 	usb_set_interface(chip->dev, fp->iface, 0);
192 	snd_usb_init_pitch(chip, fp->iface, alts, fp);
193 	snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
194 	return 0;
195 
196  error:
197 	list_del(&fp->list); /* unlink for avoiding double-free */
198 	kfree(fp);
199 	kfree(rate_table);
200 	return err;
201 }
202 
203 static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
204 				 struct usb_interface *iface,
205 				 struct usb_driver *driver)
206 {
207 	struct usb_host_interface *alts;
208 	struct usb_interface_descriptor *altsd;
209 	struct usb_endpoint_descriptor *epd;
210 	struct uac1_as_header_descriptor *ashd;
211 	struct uac_format_type_i_discrete_descriptor *fmtd;
212 
213 	/*
214 	 * Most Roland/Yamaha audio streaming interfaces have more or less
215 	 * standard descriptors, but older devices might lack descriptors, and
216 	 * future ones might change, so ensure that we fail silently if the
217 	 * interface doesn't look exactly right.
218 	 */
219 
220 	/* must have a non-zero altsetting for streaming */
221 	if (iface->num_altsetting < 2)
222 		return -ENODEV;
223 	alts = &iface->altsetting[1];
224 	altsd = get_iface_desc(alts);
225 
226 	/* must have an isochronous endpoint for streaming */
227 	if (altsd->bNumEndpoints < 1)
228 		return -ENODEV;
229 	epd = get_endpoint(alts, 0);
230 	if (!usb_endpoint_xfer_isoc(epd))
231 		return -ENODEV;
232 
233 	/* must have format descriptors */
234 	ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
235 				       UAC_AS_GENERAL);
236 	fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
237 				       UAC_FORMAT_TYPE);
238 	if (!ashd || ashd->bLength < 7 ||
239 	    !fmtd || fmtd->bLength < 8)
240 		return -ENODEV;
241 
242 	return create_standard_audio_quirk(chip, iface, driver, NULL);
243 }
244 
245 static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
246 				    struct usb_interface *iface,
247 				    struct usb_driver *driver,
248 				    struct usb_host_interface *alts)
249 {
250 	static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
251 		.type = QUIRK_MIDI_YAMAHA
252 	};
253 	struct usb_midi_in_jack_descriptor *injd;
254 	struct usb_midi_out_jack_descriptor *outjd;
255 
256 	/* must have some valid jack descriptors */
257 	injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
258 				       NULL, USB_MS_MIDI_IN_JACK);
259 	outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
260 					NULL, USB_MS_MIDI_OUT_JACK);
261 	if (!injd && !outjd)
262 		return -ENODEV;
263 	if (injd && (injd->bLength < 5 ||
264 		     (injd->bJackType != USB_MS_EMBEDDED &&
265 		      injd->bJackType != USB_MS_EXTERNAL)))
266 		return -ENODEV;
267 	if (outjd && (outjd->bLength < 6 ||
268 		      (outjd->bJackType != USB_MS_EMBEDDED &&
269 		       outjd->bJackType != USB_MS_EXTERNAL)))
270 		return -ENODEV;
271 	return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
272 }
273 
274 static int create_roland_midi_quirk(struct snd_usb_audio *chip,
275 				    struct usb_interface *iface,
276 				    struct usb_driver *driver,
277 				    struct usb_host_interface *alts)
278 {
279 	static const struct snd_usb_audio_quirk roland_midi_quirk = {
280 		.type = QUIRK_MIDI_ROLAND
281 	};
282 	u8 *roland_desc = NULL;
283 
284 	/* might have a vendor-specific descriptor <06 24 F1 02 ...> */
285 	for (;;) {
286 		roland_desc = snd_usb_find_csint_desc(alts->extra,
287 						      alts->extralen,
288 						      roland_desc, 0xf1);
289 		if (!roland_desc)
290 			return -ENODEV;
291 		if (roland_desc[0] < 6 || roland_desc[3] != 2)
292 			continue;
293 		return create_any_midi_quirk(chip, iface, driver,
294 					     &roland_midi_quirk);
295 	}
296 }
297 
298 static int create_std_midi_quirk(struct snd_usb_audio *chip,
299 				 struct usb_interface *iface,
300 				 struct usb_driver *driver,
301 				 struct usb_host_interface *alts)
302 {
303 	struct usb_ms_header_descriptor *mshd;
304 	struct usb_ms_endpoint_descriptor *msepd;
305 
306 	/* must have the MIDIStreaming interface header descriptor*/
307 	mshd = (struct usb_ms_header_descriptor *)alts->extra;
308 	if (alts->extralen < 7 ||
309 	    mshd->bLength < 7 ||
310 	    mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
311 	    mshd->bDescriptorSubtype != USB_MS_HEADER)
312 		return -ENODEV;
313 	/* must have the MIDIStreaming endpoint descriptor*/
314 	msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
315 	if (alts->endpoint[0].extralen < 4 ||
316 	    msepd->bLength < 4 ||
317 	    msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
318 	    msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
319 	    msepd->bNumEmbMIDIJack < 1 ||
320 	    msepd->bNumEmbMIDIJack > 16)
321 		return -ENODEV;
322 
323 	return create_any_midi_quirk(chip, iface, driver, NULL);
324 }
325 
326 static int create_auto_midi_quirk(struct snd_usb_audio *chip,
327 				  struct usb_interface *iface,
328 				  struct usb_driver *driver)
329 {
330 	struct usb_host_interface *alts;
331 	struct usb_interface_descriptor *altsd;
332 	struct usb_endpoint_descriptor *epd;
333 	int err;
334 
335 	alts = &iface->altsetting[0];
336 	altsd = get_iface_desc(alts);
337 
338 	/* must have at least one bulk/interrupt endpoint for streaming */
339 	if (altsd->bNumEndpoints < 1)
340 		return -ENODEV;
341 	epd = get_endpoint(alts, 0);
342 	if (!usb_endpoint_xfer_bulk(epd) &&
343 	    !usb_endpoint_xfer_int(epd))
344 		return -ENODEV;
345 
346 	switch (USB_ID_VENDOR(chip->usb_id)) {
347 	case 0x0499: /* Yamaha */
348 		err = create_yamaha_midi_quirk(chip, iface, driver, alts);
349 		if (err != -ENODEV)
350 			return err;
351 		break;
352 	case 0x0582: /* Roland */
353 		err = create_roland_midi_quirk(chip, iface, driver, alts);
354 		if (err != -ENODEV)
355 			return err;
356 		break;
357 	}
358 
359 	return create_std_midi_quirk(chip, iface, driver, alts);
360 }
361 
362 static int create_autodetect_quirk(struct snd_usb_audio *chip,
363 				   struct usb_interface *iface,
364 				   struct usb_driver *driver)
365 {
366 	int err;
367 
368 	err = create_auto_pcm_quirk(chip, iface, driver);
369 	if (err == -ENODEV)
370 		err = create_auto_midi_quirk(chip, iface, driver);
371 	return err;
372 }
373 
374 static int create_autodetect_quirks(struct snd_usb_audio *chip,
375 				    struct usb_interface *iface,
376 				    struct usb_driver *driver,
377 				    const struct snd_usb_audio_quirk *quirk)
378 {
379 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
380 	int ifcount, ifnum, err;
381 
382 	err = create_autodetect_quirk(chip, iface, driver);
383 	if (err < 0)
384 		return err;
385 
386 	/*
387 	 * ALSA PCM playback/capture devices cannot be registered in two steps,
388 	 * so we have to claim the other corresponding interface here.
389 	 */
390 	ifcount = chip->dev->actconfig->desc.bNumInterfaces;
391 	for (ifnum = 0; ifnum < ifcount; ifnum++) {
392 		if (ifnum == probed_ifnum || quirk->ifnum >= 0)
393 			continue;
394 		iface = usb_ifnum_to_if(chip->dev, ifnum);
395 		if (!iface ||
396 		    usb_interface_claimed(iface) ||
397 		    get_iface_desc(iface->altsetting)->bInterfaceClass !=
398 							USB_CLASS_VENDOR_SPEC)
399 			continue;
400 
401 		err = create_autodetect_quirk(chip, iface, driver);
402 		if (err >= 0)
403 			usb_driver_claim_interface(driver, iface, (void *)-1L);
404 	}
405 
406 	return 0;
407 }
408 
409 /*
410  * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
411  * The only way to detect the sample rate is by looking at wMaxPacketSize.
412  */
413 static int create_uaxx_quirk(struct snd_usb_audio *chip,
414 			     struct usb_interface *iface,
415 			     struct usb_driver *driver,
416 			     const struct snd_usb_audio_quirk *quirk)
417 {
418 	static const struct audioformat ua_format = {
419 		.formats = SNDRV_PCM_FMTBIT_S24_3LE,
420 		.channels = 2,
421 		.fmt_type = UAC_FORMAT_TYPE_I,
422 		.altsetting = 1,
423 		.altset_idx = 1,
424 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
425 	};
426 	struct usb_host_interface *alts;
427 	struct usb_interface_descriptor *altsd;
428 	struct audioformat *fp;
429 	int stream, err;
430 
431 	/* both PCM and MIDI interfaces have 2 or more altsettings */
432 	if (iface->num_altsetting < 2)
433 		return -ENXIO;
434 	alts = &iface->altsetting[1];
435 	altsd = get_iface_desc(alts);
436 
437 	if (altsd->bNumEndpoints == 2) {
438 		static const struct snd_usb_midi_endpoint_info ua700_ep = {
439 			.out_cables = 0x0003,
440 			.in_cables  = 0x0003
441 		};
442 		static const struct snd_usb_audio_quirk ua700_quirk = {
443 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
444 			.data = &ua700_ep
445 		};
446 		static const struct snd_usb_midi_endpoint_info uaxx_ep = {
447 			.out_cables = 0x0001,
448 			.in_cables  = 0x0001
449 		};
450 		static const struct snd_usb_audio_quirk uaxx_quirk = {
451 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
452 			.data = &uaxx_ep
453 		};
454 		const struct snd_usb_audio_quirk *quirk =
455 			chip->usb_id == USB_ID(0x0582, 0x002b)
456 			? &ua700_quirk : &uaxx_quirk;
457 		return __snd_usbmidi_create(chip->card, iface,
458 					  &chip->midi_list, quirk,
459 					  chip->usb_id);
460 	}
461 
462 	if (altsd->bNumEndpoints != 1)
463 		return -ENXIO;
464 
465 	fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
466 	if (!fp)
467 		return -ENOMEM;
468 
469 	fp->iface = altsd->bInterfaceNumber;
470 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
471 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
472 	fp->datainterval = 0;
473 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
474 	INIT_LIST_HEAD(&fp->list);
475 
476 	switch (fp->maxpacksize) {
477 	case 0x120:
478 		fp->rate_max = fp->rate_min = 44100;
479 		break;
480 	case 0x138:
481 	case 0x140:
482 		fp->rate_max = fp->rate_min = 48000;
483 		break;
484 	case 0x258:
485 	case 0x260:
486 		fp->rate_max = fp->rate_min = 96000;
487 		break;
488 	default:
489 		usb_audio_err(chip, "unknown sample rate\n");
490 		kfree(fp);
491 		return -ENXIO;
492 	}
493 
494 	stream = (fp->endpoint & USB_DIR_IN)
495 		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
496 	err = snd_usb_add_audio_stream(chip, stream, fp);
497 	if (err < 0) {
498 		list_del(&fp->list); /* unlink for avoiding double-free */
499 		kfree(fp);
500 		return err;
501 	}
502 	usb_set_interface(chip->dev, fp->iface, 0);
503 	return 0;
504 }
505 
506 /*
507  * Create a standard mixer for the specified interface.
508  */
509 static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
510 				       struct usb_interface *iface,
511 				       struct usb_driver *driver,
512 				       const struct snd_usb_audio_quirk *quirk)
513 {
514 	if (quirk->ifnum < 0)
515 		return 0;
516 
517 	return snd_usb_create_mixer(chip, quirk->ifnum, 0);
518 }
519 
520 /*
521  * audio-interface quirks
522  *
523  * returns zero if no standard audio/MIDI parsing is needed.
524  * returns a positive value if standard audio/midi interfaces are parsed
525  * after this.
526  * returns a negative value at error.
527  */
528 int snd_usb_create_quirk(struct snd_usb_audio *chip,
529 			 struct usb_interface *iface,
530 			 struct usb_driver *driver,
531 			 const struct snd_usb_audio_quirk *quirk)
532 {
533 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
534 				    struct usb_interface *,
535 				    struct usb_driver *,
536 				    const struct snd_usb_audio_quirk *);
537 	static const quirk_func_t quirk_funcs[] = {
538 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
539 		[QUIRK_COMPOSITE] = create_composite_quirk,
540 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
541 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
542 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
543 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
544 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
545 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
546 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
547 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
548 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
549 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
550 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
551 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
552 		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
553 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
554 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
555 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
556 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
557 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
558 	};
559 
560 	if (quirk->type < QUIRK_TYPE_COUNT) {
561 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
562 	} else {
563 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
564 		return -ENXIO;
565 	}
566 }
567 
568 /*
569  * boot quirks
570  */
571 
572 #define EXTIGY_FIRMWARE_SIZE_OLD 794
573 #define EXTIGY_FIRMWARE_SIZE_NEW 483
574 
575 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
576 {
577 	struct usb_host_config *config = dev->actconfig;
578 	int err;
579 
580 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
581 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
582 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
583 		/* Send message to force it to reconnect with full interface. */
584 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
585 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
586 		if (err < 0)
587 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
588 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
589 				&dev->descriptor, sizeof(dev->descriptor));
590 		config = dev->actconfig;
591 		if (err < 0)
592 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
593 		err = usb_reset_configuration(dev);
594 		if (err < 0)
595 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
596 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
597 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
598 		return -ENODEV; /* quit this anyway */
599 	}
600 	return 0;
601 }
602 
603 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
604 {
605 	u8 buf = 1;
606 
607 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
608 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
609 			0, 0, &buf, 1);
610 	if (buf == 0) {
611 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
612 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
613 				1, 2000, NULL, 0);
614 		return -ENODEV;
615 	}
616 	return 0;
617 }
618 
619 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
620 {
621 	int err;
622 
623 	if (dev->actconfig->desc.bConfigurationValue == 1) {
624 		dev_info(&dev->dev,
625 			   "Fast Track Pro switching to config #2\n");
626 		/* This function has to be available by the usb core module.
627 		 * if it is not avialable the boot quirk has to be left out
628 		 * and the configuration has to be set by udev or hotplug
629 		 * rules
630 		 */
631 		err = usb_driver_set_configuration(dev, 2);
632 		if (err < 0)
633 			dev_dbg(&dev->dev,
634 				"error usb_driver_set_configuration: %d\n",
635 				err);
636 		/* Always return an error, so that we stop creating a device
637 		   that will just be destroyed and recreated with a new
638 		   configuration */
639 		return -ENODEV;
640 	} else
641 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
642 
643 	return 0;
644 }
645 
646 /*
647  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
648  * documented in the device's data sheet.
649  */
650 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
651 {
652 	u8 buf[4];
653 	buf[0] = 0x20;
654 	buf[1] = value & 0xff;
655 	buf[2] = (value >> 8) & 0xff;
656 	buf[3] = reg;
657 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
658 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
659 			       0, 0, &buf, 4);
660 }
661 
662 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
663 {
664 	/*
665 	 * Enable line-out driver mode, set headphone source to front
666 	 * channels, enable stereo mic.
667 	 */
668 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
669 }
670 
671 /*
672  * CM6206 registers from the CM6206 datasheet rev 2.1
673  */
674 #define CM6206_REG0_DMA_MASTER BIT(15)
675 #define CM6206_REG0_SPDIFO_RATE_48K (2 << 12)
676 #define CM6206_REG0_SPDIFO_RATE_96K (7 << 12)
677 /* Bit 4 thru 11 is the S/PDIF category code */
678 #define CM6206_REG0_SPDIFO_CAT_CODE_GENERAL (0 << 4)
679 #define CM6206_REG0_SPDIFO_EMPHASIS_CD BIT(3)
680 #define CM6206_REG0_SPDIFO_COPYRIGHT_NA BIT(2)
681 #define CM6206_REG0_SPDIFO_NON_AUDIO BIT(1)
682 #define CM6206_REG0_SPDIFO_PRO_FORMAT BIT(0)
683 
684 #define CM6206_REG1_TEST_SEL_CLK BIT(14)
685 #define CM6206_REG1_PLLBIN_EN BIT(13)
686 #define CM6206_REG1_SOFT_MUTE_EN BIT(12)
687 #define CM6206_REG1_GPIO4_OUT BIT(11)
688 #define CM6206_REG1_GPIO4_OE BIT(10)
689 #define CM6206_REG1_GPIO3_OUT BIT(9)
690 #define CM6206_REG1_GPIO3_OE BIT(8)
691 #define CM6206_REG1_GPIO2_OUT BIT(7)
692 #define CM6206_REG1_GPIO2_OE BIT(6)
693 #define CM6206_REG1_GPIO1_OUT BIT(5)
694 #define CM6206_REG1_GPIO1_OE BIT(4)
695 #define CM6206_REG1_SPDIFO_INVALID BIT(3)
696 #define CM6206_REG1_SPDIF_LOOP_EN BIT(2)
697 #define CM6206_REG1_SPDIFO_DIS BIT(1)
698 #define CM6206_REG1_SPDIFI_MIX BIT(0)
699 
700 #define CM6206_REG2_DRIVER_ON BIT(15)
701 #define CM6206_REG2_HEADP_SEL_SIDE_CHANNELS (0 << 13)
702 #define CM6206_REG2_HEADP_SEL_SURROUND_CHANNELS (1 << 13)
703 #define CM6206_REG2_HEADP_SEL_CENTER_SUBW (2 << 13)
704 #define CM6206_REG2_HEADP_SEL_FRONT_CHANNELS (3 << 13)
705 #define CM6206_REG2_MUTE_HEADPHONE_RIGHT BIT(12)
706 #define CM6206_REG2_MUTE_HEADPHONE_LEFT BIT(11)
707 #define CM6206_REG2_MUTE_REAR_SURROUND_RIGHT BIT(10)
708 #define CM6206_REG2_MUTE_REAR_SURROUND_LEFT BIT(9)
709 #define CM6206_REG2_MUTE_SIDE_SURROUND_RIGHT BIT(8)
710 #define CM6206_REG2_MUTE_SIDE_SURROUND_LEFT BIT(7)
711 #define CM6206_REG2_MUTE_SUBWOOFER BIT(6)
712 #define CM6206_REG2_MUTE_CENTER BIT(5)
713 #define CM6206_REG2_MUTE_RIGHT_FRONT BIT(3)
714 #define CM6206_REG2_MUTE_LEFT_FRONT BIT(3)
715 #define CM6206_REG2_EN_BTL BIT(2)
716 #define CM6206_REG2_MCUCLKSEL_1_5_MHZ (0)
717 #define CM6206_REG2_MCUCLKSEL_3_MHZ (1)
718 #define CM6206_REG2_MCUCLKSEL_6_MHZ (2)
719 #define CM6206_REG2_MCUCLKSEL_12_MHZ (3)
720 
721 /* Bit 11..13 sets the sensitivity to FLY tuner volume control VP/VD signal */
722 #define CM6206_REG3_FLYSPEED_DEFAULT (2 << 11)
723 #define CM6206_REG3_VRAP25EN BIT(10)
724 #define CM6206_REG3_MSEL1 BIT(9)
725 #define CM6206_REG3_SPDIFI_RATE_44_1K BIT(0 << 7)
726 #define CM6206_REG3_SPDIFI_RATE_48K BIT(2 << 7)
727 #define CM6206_REG3_SPDIFI_RATE_32K BIT(3 << 7)
728 #define CM6206_REG3_PINSEL BIT(6)
729 #define CM6206_REG3_FOE BIT(5)
730 #define CM6206_REG3_ROE BIT(4)
731 #define CM6206_REG3_CBOE BIT(3)
732 #define CM6206_REG3_LOSE BIT(2)
733 #define CM6206_REG3_HPOE BIT(1)
734 #define CM6206_REG3_SPDIFI_CANREC BIT(0)
735 
736 #define CM6206_REG5_DA_RSTN BIT(13)
737 #define CM6206_REG5_AD_RSTN BIT(12)
738 #define CM6206_REG5_SPDIFO_AD2SPDO BIT(12)
739 #define CM6206_REG5_SPDIFO_SEL_FRONT (0 << 9)
740 #define CM6206_REG5_SPDIFO_SEL_SIDE_SUR (1 << 9)
741 #define CM6206_REG5_SPDIFO_SEL_CEN_LFE (2 << 9)
742 #define CM6206_REG5_SPDIFO_SEL_REAR_SUR (3 << 9)
743 #define CM6206_REG5_CODECM BIT(8)
744 #define CM6206_REG5_EN_HPF BIT(7)
745 #define CM6206_REG5_T_SEL_DSDA4 BIT(6)
746 #define CM6206_REG5_T_SEL_DSDA3 BIT(5)
747 #define CM6206_REG5_T_SEL_DSDA2 BIT(4)
748 #define CM6206_REG5_T_SEL_DSDA1 BIT(3)
749 #define CM6206_REG5_T_SEL_DSDAD_NORMAL 0
750 #define CM6206_REG5_T_SEL_DSDAD_FRONT 4
751 #define CM6206_REG5_T_SEL_DSDAD_S_SURROUND 5
752 #define CM6206_REG5_T_SEL_DSDAD_CEN_LFE 6
753 #define CM6206_REG5_T_SEL_DSDAD_R_SURROUND 7
754 
755 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
756 {
757 	int err  = 0, reg;
758 	int val[] = {
759 		/*
760 		 * Values here are chosen based on sniffing USB traffic
761 		 * under Windows.
762 		 *
763 		 * REG0: DAC is master, sample rate 48kHz, no copyright
764 		 */
765 		CM6206_REG0_SPDIFO_RATE_48K |
766 		CM6206_REG0_SPDIFO_COPYRIGHT_NA,
767 		/*
768 		 * REG1: PLL binary search enable, soft mute enable.
769 		 */
770 		CM6206_REG1_PLLBIN_EN |
771 		CM6206_REG1_SOFT_MUTE_EN |
772 		/*
773 		 * REG2: enable output drivers,
774 		 * select front channels to the headphone output,
775 		 * then mute the headphone channels, run the MCU
776 		 * at 1.5 MHz.
777 		 */
778 		CM6206_REG2_DRIVER_ON |
779 		CM6206_REG2_HEADP_SEL_FRONT_CHANNELS |
780 		CM6206_REG2_MUTE_HEADPHONE_RIGHT |
781 		CM6206_REG2_MUTE_HEADPHONE_LEFT,
782 		/*
783 		 * REG3: default flyspeed, set 2.5V mic bias
784 		 * enable all line out ports and enable SPDIF
785 		 */
786 		CM6206_REG3_FLYSPEED_DEFAULT |
787 		CM6206_REG3_VRAP25EN |
788 		CM6206_REG3_FOE |
789 		CM6206_REG3_ROE |
790 		CM6206_REG3_CBOE |
791 		CM6206_REG3_LOSE |
792 		CM6206_REG3_HPOE |
793 		CM6206_REG3_SPDIFI_CANREC,
794 		/* REG4 is just a bunch of GPIO lines */
795 		0x0000,
796 		/* REG5: de-assert AD/DA reset signals */
797 		CM6206_REG5_DA_RSTN |
798 		CM6206_REG5_AD_RSTN };
799 
800 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
801 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
802 		if (err < 0)
803 			return err;
804 	}
805 
806 	return err;
807 }
808 
809 /* quirk for Plantronics GameCom 780 with CM6302 chip */
810 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
811 {
812 	/* set the initial volume and don't change; other values are either
813 	 * too loud or silent due to firmware bug (bko#65251)
814 	 */
815 	u8 buf[2] = { 0x74, 0xe3 };
816 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
817 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
818 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
819 }
820 
821 /*
822  * Novation Twitch DJ controller
823  * Focusrite Novation Saffire 6 USB audio card
824  */
825 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
826 {
827 	/* preemptively set up the device because otherwise the
828 	 * raw MIDI endpoints are not active */
829 	usb_set_interface(dev, 0, 1);
830 	return 0;
831 }
832 
833 /*
834  * This call will put the synth in "USB send" mode, i.e it will send MIDI
835  * messages through USB (this is disabled at startup). The synth will
836  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
837  * sign on its LCD. Values here are chosen based on sniffing USB traffic
838  * under Windows.
839  */
840 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
841 {
842 	int err, actual_length;
843 
844 	/* "midi send" enable */
845 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
846 
847 	void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
848 	if (!buf)
849 		return -ENOMEM;
850 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
851 			ARRAY_SIZE(seq), &actual_length, 1000);
852 	kfree(buf);
853 	if (err < 0)
854 		return err;
855 
856 	return 0;
857 }
858 
859 /*
860  * Some sound cards from Native Instruments are in fact compliant to the USB
861  * audio standard of version 2 and other approved USB standards, even though
862  * they come up as vendor-specific device when first connected.
863  *
864  * However, they can be told to come up with a new set of descriptors
865  * upon their next enumeration, and the interfaces announced by the new
866  * descriptors will then be handled by the kernel's class drivers. As the
867  * product ID will also change, no further checks are required.
868  */
869 
870 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
871 {
872 	int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
873 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
874 				  1, 0, NULL, 0, 1000);
875 
876 	if (ret < 0)
877 		return ret;
878 
879 	usb_reset_device(dev);
880 
881 	/* return -EAGAIN, so the creation of an audio interface for this
882 	 * temporary device is aborted. The device will reconnect with a
883 	 * new product ID */
884 	return -EAGAIN;
885 }
886 
887 static void mbox2_setup_48_24_magic(struct usb_device *dev)
888 {
889 	u8 srate[3];
890 	u8 temp[12];
891 
892 	/* Choose 48000Hz permanently */
893 	srate[0] = 0x80;
894 	srate[1] = 0xbb;
895 	srate[2] = 0x00;
896 
897 	/* Send the magic! */
898 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
899 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
900 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
901 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
902 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
903 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
904 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
905 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
906 	return;
907 }
908 
909 /* Digidesign Mbox 2 needs to load firmware onboard
910  * and driver must wait a few seconds for initialisation.
911  */
912 
913 #define MBOX2_FIRMWARE_SIZE    646
914 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
915 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
916 
917 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
918 {
919 	struct usb_host_config *config = dev->actconfig;
920 	int err;
921 	u8 bootresponse[0x12];
922 	int fwsize;
923 	int count;
924 
925 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
926 
927 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
928 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
929 		return -ENODEV;
930 	}
931 
932 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
933 
934 	count = 0;
935 	bootresponse[0] = MBOX2_BOOT_LOADING;
936 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
937 		msleep(500); /* 0.5 second delay */
938 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
939 			/* Control magic - load onboard firmware */
940 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
941 		if (bootresponse[0] == MBOX2_BOOT_READY)
942 			break;
943 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
944 		count++;
945 	}
946 
947 	if (bootresponse[0] != MBOX2_BOOT_READY) {
948 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
949 		return -ENODEV;
950 	}
951 
952 	dev_dbg(&dev->dev, "device initialised!\n");
953 
954 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
955 		&dev->descriptor, sizeof(dev->descriptor));
956 	config = dev->actconfig;
957 	if (err < 0)
958 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
959 
960 	err = usb_reset_configuration(dev);
961 	if (err < 0)
962 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
963 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
964 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
965 
966 	mbox2_setup_48_24_magic(dev);
967 
968 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
969 
970 	return 0; /* Successful boot */
971 }
972 
973 static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
974 {
975 	int err;
976 
977 	dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
978 
979 	/* If the Axe-Fx III has not fully booted, it will timeout when trying
980 	 * to enable the audio streaming interface. A more generous timeout is
981 	 * used here to detect when the Axe-Fx III has finished booting as the
982 	 * set interface message will be acked once it has
983 	 */
984 	err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
985 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
986 				1, 1, NULL, 0, 120000);
987 	if (err < 0) {
988 		dev_err(&dev->dev,
989 			"failed waiting for Axe-Fx III to boot: %d\n", err);
990 		return err;
991 	}
992 
993 	dev_dbg(&dev->dev, "Axe-Fx III is now ready\n");
994 
995 	err = usb_set_interface(dev, 1, 0);
996 	if (err < 0)
997 		dev_dbg(&dev->dev,
998 			"error stopping Axe-Fx III interface: %d\n", err);
999 
1000 	return 0;
1001 }
1002 
1003 /*
1004  * Setup quirks
1005  */
1006 #define MAUDIO_SET		0x01 /* parse device_setup */
1007 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
1008 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
1009 #define MAUDIO_SET_96K		0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
1010 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
1011 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
1012 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
1013 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48KHz+Digital Input */
1014 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
1015 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48KHz+Digital Input */
1016 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */
1017 
1018 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
1019 				      int iface, int altno)
1020 {
1021 	/* Reset ALL ifaces to 0 altsetting.
1022 	 * Call it for every possible altsetting of every interface.
1023 	 */
1024 	usb_set_interface(chip->dev, iface, 0);
1025 	if (chip->setup & MAUDIO_SET) {
1026 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
1027 			if (iface != 1 && iface != 2)
1028 				return 1; /* skip all interfaces but 1 and 2 */
1029 		} else {
1030 			unsigned int mask;
1031 			if (iface == 1 || iface == 2)
1032 				return 1; /* skip interfaces 1 and 2 */
1033 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1034 				return 1; /* skip this altsetting */
1035 			mask = chip->setup & MAUDIO_SET_MASK;
1036 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1037 				return 1; /* skip this altsetting */
1038 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1039 				return 1; /* skip this altsetting */
1040 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
1041 				return 1; /* skip this altsetting */
1042 		}
1043 	}
1044 	usb_audio_dbg(chip,
1045 		    "using altsetting %d for interface %d config %d\n",
1046 		    altno, iface, chip->setup);
1047 	return 0; /* keep this altsetting */
1048 }
1049 
1050 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
1051 					 int iface,
1052 					 int altno)
1053 {
1054 	/* Reset ALL ifaces to 0 altsetting.
1055 	 * Call it for every possible altsetting of every interface.
1056 	 */
1057 	usb_set_interface(chip->dev, iface, 0);
1058 
1059 	if (chip->setup & MAUDIO_SET) {
1060 		unsigned int mask;
1061 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
1062 			return 1; /* skip this altsetting */
1063 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1064 			return 1; /* skip this altsetting */
1065 		mask = chip->setup & MAUDIO_SET_MASK;
1066 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1067 			return 1; /* skip this altsetting */
1068 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1069 			return 1; /* skip this altsetting */
1070 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
1071 			return 1; /* skip this altsetting */
1072 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
1073 			return 1; /* skip this altsetting */
1074 	}
1075 
1076 	return 0; /* keep this altsetting */
1077 }
1078 
1079 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
1080 					   int iface, int altno)
1081 {
1082 	/* Reset ALL ifaces to 0 altsetting.
1083 	 * Call it for every possible altsetting of every interface.
1084 	 */
1085 	usb_set_interface(chip->dev, iface, 0);
1086 
1087 	/* possible configuration where both inputs and only one output is
1088 	 *used is not supported by the current setup
1089 	 */
1090 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
1091 		if (chip->setup & MAUDIO_SET_96K) {
1092 			if (altno != 3 && altno != 6)
1093 				return 1;
1094 		} else if (chip->setup & MAUDIO_SET_DI) {
1095 			if (iface == 4)
1096 				return 1; /* no analog input */
1097 			if (altno != 2 && altno != 5)
1098 				return 1; /* enable only altsets 2 and 5 */
1099 		} else {
1100 			if (iface == 5)
1101 				return 1; /* disable digialt input */
1102 			if (altno != 2 && altno != 5)
1103 				return 1; /* enalbe only altsets 2 and 5 */
1104 		}
1105 	} else {
1106 		/* keep only 16-Bit mode */
1107 		if (altno != 1)
1108 			return 1;
1109 	}
1110 
1111 	usb_audio_dbg(chip,
1112 		    "using altsetting %d for interface %d config %d\n",
1113 		    altno, iface, chip->setup);
1114 	return 0; /* keep this altsetting */
1115 }
1116 
1117 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
1118 				  int iface,
1119 				  int altno)
1120 {
1121 	/* audiophile usb: skip altsets incompatible with device_setup */
1122 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
1123 		return audiophile_skip_setting_quirk(chip, iface, altno);
1124 	/* quattro usb: skip altsets incompatible with device_setup */
1125 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
1126 		return quattro_skip_setting_quirk(chip, iface, altno);
1127 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
1128 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
1129 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
1130 
1131 	return 0;
1132 }
1133 
1134 int snd_usb_apply_boot_quirk(struct usb_device *dev,
1135 			     struct usb_interface *intf,
1136 			     const struct snd_usb_audio_quirk *quirk,
1137 			     unsigned int id)
1138 {
1139 	switch (id) {
1140 	case USB_ID(0x041e, 0x3000):
1141 		/* SB Extigy needs special boot-up sequence */
1142 		/* if more models come, this will go to the quirk list. */
1143 		return snd_usb_extigy_boot_quirk(dev, intf);
1144 
1145 	case USB_ID(0x041e, 0x3020):
1146 		/* SB Audigy 2 NX needs its own boot-up magic, too */
1147 		return snd_usb_audigy2nx_boot_quirk(dev);
1148 
1149 	case USB_ID(0x10f5, 0x0200):
1150 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
1151 		return snd_usb_cm106_boot_quirk(dev);
1152 
1153 	case USB_ID(0x0d8c, 0x0102):
1154 		/* C-Media CM6206 / CM106-Like Sound Device */
1155 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
1156 		return snd_usb_cm6206_boot_quirk(dev);
1157 
1158 	case USB_ID(0x0dba, 0x3000):
1159 		/* Digidesign Mbox 2 */
1160 		return snd_usb_mbox2_boot_quirk(dev);
1161 
1162 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
1163 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
1164 		return snd_usb_novation_boot_quirk(dev);
1165 
1166 	case USB_ID(0x133e, 0x0815):
1167 		/* Access Music VirusTI Desktop */
1168 		return snd_usb_accessmusic_boot_quirk(dev);
1169 
1170 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1171 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1172 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1173 		return snd_usb_nativeinstruments_boot_quirk(dev);
1174 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1175 		return snd_usb_fasttrackpro_boot_quirk(dev);
1176 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1177 		return snd_usb_gamecon780_boot_quirk(dev);
1178 	case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx 3 */
1179 		return snd_usb_axefx3_boot_quirk(dev);
1180 	}
1181 
1182 	return 0;
1183 }
1184 
1185 /*
1186  * check if the device uses big-endian samples
1187  */
1188 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1189 {
1190 	/* it depends on altsetting whether the device is big-endian or not */
1191 	switch (chip->usb_id) {
1192 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1193 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1194 			fp->altsetting == 5 || fp->altsetting == 6)
1195 			return 1;
1196 		break;
1197 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1198 		if (chip->setup == 0x00 ||
1199 			fp->altsetting == 1 || fp->altsetting == 2 ||
1200 			fp->altsetting == 3)
1201 			return 1;
1202 		break;
1203 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1204 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1205 			fp->altsetting == 5 || fp->altsetting == 6)
1206 			return 1;
1207 		break;
1208 	}
1209 	return 0;
1210 }
1211 
1212 /*
1213  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1214  * not for interface.
1215  */
1216 
1217 enum {
1218 	EMU_QUIRK_SR_44100HZ = 0,
1219 	EMU_QUIRK_SR_48000HZ,
1220 	EMU_QUIRK_SR_88200HZ,
1221 	EMU_QUIRK_SR_96000HZ,
1222 	EMU_QUIRK_SR_176400HZ,
1223 	EMU_QUIRK_SR_192000HZ
1224 };
1225 
1226 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1227 				 struct audioformat *fmt)
1228 {
1229 	unsigned char emu_samplerate_id = 0;
1230 
1231 	/* When capture is active
1232 	 * sample rate shouldn't be changed
1233 	 * by playback substream
1234 	 */
1235 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1236 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1237 			return;
1238 	}
1239 
1240 	switch (fmt->rate_min) {
1241 	case 48000:
1242 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1243 		break;
1244 	case 88200:
1245 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1246 		break;
1247 	case 96000:
1248 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1249 		break;
1250 	case 176400:
1251 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1252 		break;
1253 	case 192000:
1254 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1255 		break;
1256 	default:
1257 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1258 		break;
1259 	}
1260 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1261 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1262 }
1263 
1264 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1265 			      struct audioformat *fmt)
1266 {
1267 	switch (subs->stream->chip->usb_id) {
1268 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1269 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1270 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1271 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1272 		set_format_emu_quirk(subs, fmt);
1273 		break;
1274 	}
1275 }
1276 
1277 bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
1278 {
1279 	/* devices which do not support reading the sample rate. */
1280 	switch (chip->usb_id) {
1281 	case USB_ID(0x041E, 0x4080): /* Creative Live Cam VF0610 */
1282 	case USB_ID(0x04D8, 0xFEEA): /* Benchmark DAC1 Pre */
1283 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
1284 	case USB_ID(0x05A3, 0x9420): /* ELP HD USB Camera */
1285 	case USB_ID(0x074D, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
1286 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
1287 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
1288 	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
1289 		return true;
1290 	}
1291 
1292 	/* devices of these vendors don't support reading rate, either */
1293 	switch (USB_ID_VENDOR(chip->usb_id)) {
1294 	case 0x045E: /* MS Lifecam */
1295 	case 0x047F: /* Plantronics */
1296 	case 0x1de7: /* Phoenix Audio */
1297 		return true;
1298 	}
1299 
1300 	return false;
1301 }
1302 
1303 /* ITF-USB DSD based DACs need a vendor cmd to switch
1304  * between PCM and native DSD mode
1305  */
1306 static bool is_itf_usb_dsd_dac(unsigned int id)
1307 {
1308 	switch (id) {
1309 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
1310 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
1311 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
1312 	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
1313 	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
1314 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
1315 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
1316 		return true;
1317 	}
1318 	return false;
1319 }
1320 
1321 int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
1322 			      struct audioformat *fmt)
1323 {
1324 	struct usb_device *dev = subs->dev;
1325 	int err;
1326 
1327 	if (is_itf_usb_dsd_dac(subs->stream->chip->usb_id)) {
1328 		/* First switch to alt set 0, otherwise the mode switch cmd
1329 		 * will not be accepted by the DAC
1330 		 */
1331 		err = usb_set_interface(dev, fmt->iface, 0);
1332 		if (err < 0)
1333 			return err;
1334 
1335 		msleep(20); /* Delay needed after setting the interface */
1336 
1337 		/* Vendor mode switch cmd is required. */
1338 		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
1339 			/* DSD mode (DSD_U32) requested */
1340 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1341 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1342 					      1, 1, NULL, 0);
1343 			if (err < 0)
1344 				return err;
1345 
1346 		} else {
1347 			/* PCM or DOP mode (S32) requested */
1348 			/* PCM mode (S16) requested */
1349 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1350 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1351 					      0, 1, NULL, 0);
1352 			if (err < 0)
1353 				return err;
1354 
1355 		}
1356 		msleep(20);
1357 	}
1358 	return 0;
1359 }
1360 
1361 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1362 {
1363 	/*
1364 	 * "Playback Design" products send bogus feedback data at the start
1365 	 * of the stream. Ignore them.
1366 	 */
1367 	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
1368 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1369 		ep->skip_packets = 4;
1370 
1371 	/*
1372 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1373 	 * world latency varies by approx. +/- 50 frames (at 96KHz) each time
1374 	 * the stream is (re)started. When skipping packets 16 at endpoint
1375 	 * start up, the real world latency is stable within +/- 1 frame (also
1376 	 * across power cycles).
1377 	 */
1378 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1379 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1380 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1381 		ep->skip_packets = 16;
1382 
1383 	/* Work around devices that report unreasonable feedback data */
1384 	if ((ep->chip->usb_id == USB_ID(0x0644, 0x8038) ||  /* TEAC UD-H01 */
1385 	     ep->chip->usb_id == USB_ID(0x1852, 0x5034)) && /* T+A Dac8 */
1386 	    ep->syncmaxsize == 4)
1387 		ep->tenor_fb_quirk = 1;
1388 }
1389 
1390 void snd_usb_set_interface_quirk(struct usb_device *dev)
1391 {
1392 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1393 
1394 	if (!chip)
1395 		return;
1396 	/*
1397 	 * "Playback Design" products need a 50ms delay after setting the
1398 	 * USB interface.
1399 	 */
1400 	switch (USB_ID_VENDOR(chip->usb_id)) {
1401 	case 0x23ba: /* Playback Design */
1402 	case 0x0644: /* TEAC Corp. */
1403 		msleep(50);
1404 		break;
1405 	}
1406 }
1407 
1408 /* quirk applied after snd_usb_ctl_msg(); not applied during boot quirks */
1409 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1410 			   __u8 request, __u8 requesttype, __u16 value,
1411 			   __u16 index, void *data, __u16 size)
1412 {
1413 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1414 
1415 	if (!chip)
1416 		return;
1417 	/*
1418 	 * "Playback Design" products need a 20ms delay after each
1419 	 * class compliant request
1420 	 */
1421 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1422 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1423 		msleep(20);
1424 
1425 	/*
1426 	 * "TEAC Corp." products need a 20ms delay after each
1427 	 * class compliant request
1428 	 */
1429 	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
1430 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1431 		msleep(20);
1432 
1433 	/* ITF-USB DSD based DACs functionality need a delay
1434 	 * after each class compliant request
1435 	 */
1436 	if (is_itf_usb_dsd_dac(chip->usb_id)
1437 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1438 		msleep(20);
1439 
1440 	/* Zoom R16/24, Logitech H650e, Jabra 550a needs a tiny delay here,
1441 	 * otherwise requests like get/set frequency return as failed despite
1442 	 * actually succeeding.
1443 	 */
1444 	if ((chip->usb_id == USB_ID(0x1686, 0x00dd) ||
1445 	     chip->usb_id == USB_ID(0x046d, 0x0a46) ||
1446 	     chip->usb_id == USB_ID(0x0b0e, 0x0349)) &&
1447 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1448 		usleep_range(1000, 2000);
1449 }
1450 
1451 /*
1452  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1453  * augment the PCM format bit-field for DSD types. The UAC standards
1454  * don't have a designated bit field to denote DSD-capable interfaces,
1455  * hence all hardware that is known to support this format has to be
1456  * listed here.
1457  */
1458 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1459 					struct audioformat *fp,
1460 					unsigned int sample_bytes)
1461 {
1462 	struct usb_interface *iface;
1463 
1464 	/* Playback Designs */
1465 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba) {
1466 		switch (fp->altsetting) {
1467 		case 1:
1468 			fp->dsd_dop = true;
1469 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1470 		case 2:
1471 			fp->dsd_bitrev = true;
1472 			return SNDRV_PCM_FMTBIT_DSD_U8;
1473 		case 3:
1474 			fp->dsd_bitrev = true;
1475 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1476 		}
1477 	}
1478 
1479 	/* XMOS based USB DACs */
1480 	switch (chip->usb_id) {
1481 	case USB_ID(0x1511, 0x0037): /* AURALiC VEGA */
1482 	case USB_ID(0x20b1, 0x0002): /* Wyred 4 Sound DAC-2 DSD */
1483 	case USB_ID(0x20b1, 0x2004): /* Matrix Audio X-SPDIF 2 */
1484 	case USB_ID(0x20b1, 0x2008): /* Matrix Audio X-Sabre */
1485 	case USB_ID(0x20b1, 0x300a): /* Matrix Audio Mini-i Pro */
1486 	case USB_ID(0x22d9, 0x0416): /* OPPO HA-1 */
1487 	case USB_ID(0x22d9, 0x0436): /* OPPO Sonica */
1488 	case USB_ID(0x22d9, 0x0461): /* OPPO UDP-205 */
1489 	case USB_ID(0x2522, 0x0012): /* LH Labs VI DAC Infinity */
1490 	case USB_ID(0x2772, 0x0230): /* Pro-Ject Pre Box S2 Digital */
1491 		if (fp->altsetting == 2)
1492 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1493 		break;
1494 
1495 	case USB_ID(0x152a, 0x85de): /* SMSL D1 DAC */
1496 	case USB_ID(0x16d0, 0x09dd): /* Encore mDSD */
1497 	case USB_ID(0x0d8c, 0x0316): /* Hegel HD12 DSD */
1498 	case USB_ID(0x16b0, 0x06b2): /* NuPrime DAC-10 */
1499 	case USB_ID(0x16d0, 0x0733): /* Furutech ADL Stratos */
1500 	case USB_ID(0x16d0, 0x09db): /* NuPrime Audio DAC-9 */
1501 	case USB_ID(0x1db5, 0x0003): /* Bryston BDA3 */
1502 	case USB_ID(0x20b1, 0x000a): /* Gustard DAC-X20U */
1503 	case USB_ID(0x20b1, 0x2005): /* Denafrips Ares DAC */
1504 	case USB_ID(0x20b1, 0x2009): /* DIYINHK DSD DXD 384kHz USB to I2S/DSD */
1505 	case USB_ID(0x20b1, 0x2023): /* JLsounds I2SoverUSB */
1506 	case USB_ID(0x20b1, 0x3021): /* Eastern El. MiniMax Tube DAC Supreme */
1507 	case USB_ID(0x20b1, 0x3023): /* Aune X1S 32BIT/384 DSD DAC */
1508 	case USB_ID(0x20b1, 0x302d): /* Unison Research Unico CD Due */
1509 	case USB_ID(0x20b1, 0x307b): /* CH Precision C1 DAC */
1510 	case USB_ID(0x20b1, 0x3086): /* Singxer F-1 converter board */
1511 	case USB_ID(0x22d9, 0x0426): /* OPPO HA-2 */
1512 	case USB_ID(0x22e1, 0xca01): /* HDTA Serenade DSD */
1513 	case USB_ID(0x249c, 0x9326): /* M2Tech Young MkIII */
1514 	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
1515 	case USB_ID(0x2622, 0x0041): /* Audiolab M-DAC+ */
1516 	case USB_ID(0x27f7, 0x3002): /* W4S DAC-2v2SE */
1517 	case USB_ID(0x29a2, 0x0086): /* Mutec MC3+ USB */
1518 	case USB_ID(0x6b42, 0x0042): /* MSB Technology */
1519 		if (fp->altsetting == 3)
1520 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1521 		break;
1522 
1523 	/* Amanero Combo384 USB based DACs with native DSD support */
1524 	case USB_ID(0x16d0, 0x071a):  /* Amanero - Combo384 */
1525 	case USB_ID(0x2ab6, 0x0004):  /* T+A DAC8DSD-V2.0, MP1000E-V2.0, MP2000R-V2.0, MP2500R-V2.0, MP3100HV-V2.0 */
1526 	case USB_ID(0x2ab6, 0x0005):  /* T+A USB HD Audio 1 */
1527 	case USB_ID(0x2ab6, 0x0006):  /* T+A USB HD Audio 2 */
1528 		if (fp->altsetting == 2) {
1529 			switch (le16_to_cpu(chip->dev->descriptor.bcdDevice)) {
1530 			case 0x199:
1531 				return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1532 			case 0x19b:
1533 			case 0x203:
1534 				return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1535 			default:
1536 				break;
1537 			}
1538 		}
1539 		break;
1540 	case USB_ID(0x16d0, 0x0a23):
1541 		if (fp->altsetting == 2)
1542 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1543 		break;
1544 
1545 	default:
1546 		break;
1547 	}
1548 
1549 	/* ITF-USB DSD based DACs */
1550 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1551 		iface = usb_ifnum_to_if(chip->dev, fp->iface);
1552 
1553 		/* Altsetting 2 support native DSD if the num of altsets is
1554 		 * three (0-2),
1555 		 * Altsetting 3 support native DSD if the num of altsets is
1556 		 * four (0-3).
1557 		 */
1558 		if (fp->altsetting == iface->num_altsetting - 1)
1559 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1560 	}
1561 
1562 	/* Mostly generic method to detect many DSD-capable implementations -
1563 	 * from XMOS/Thesycon
1564 	 */
1565 	switch (USB_ID_VENDOR(chip->usb_id)) {
1566 	case 0x20b1:  /* XMOS based devices */
1567 	case 0x152a:  /* Thesycon devices */
1568 	case 0x25ce:  /* Mytek devices */
1569 		if (fp->dsd_raw)
1570 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1571 		break;
1572 	default:
1573 		break;
1574 
1575 	}
1576 
1577 	return 0;
1578 }
1579 
1580 void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
1581 					  struct audioformat *fp,
1582 					  int stream)
1583 {
1584 	switch (chip->usb_id) {
1585 	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1586 		/* Optoplay sets the sample rate attribute although
1587 		 * it seems not supporting it in fact.
1588 		 */
1589 		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
1590 		break;
1591 	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
1592 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1593 		/* doesn't set the sample rate attribute, but supports it */
1594 		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
1595 		break;
1596 	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
1597 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1598 	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
1599 	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
1600 					an older model 77d:223) */
1601 	/*
1602 	 * plantronics headset and Griffin iMic have set adaptive-in
1603 	 * although it's really not...
1604 	 */
1605 		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
1606 		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1607 			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
1608 		else
1609 			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
1610 		break;
1611 	}
1612 }
1613