xref: /openbmc/linux/sound/usb/quirks.c (revision 51c2ee6d)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  */
4 
5 #include <linux/init.h>
6 #include <linux/slab.h>
7 #include <linux/usb.h>
8 #include <linux/usb/audio.h>
9 #include <linux/usb/midi.h>
10 #include <linux/bits.h>
11 
12 #include <sound/control.h>
13 #include <sound/core.h>
14 #include <sound/info.h>
15 #include <sound/pcm.h>
16 
17 #include "usbaudio.h"
18 #include "card.h"
19 #include "mixer.h"
20 #include "mixer_quirks.h"
21 #include "midi.h"
22 #include "quirks.h"
23 #include "helper.h"
24 #include "endpoint.h"
25 #include "pcm.h"
26 #include "clock.h"
27 #include "stream.h"
28 
29 /*
30  * handle the quirks for the contained interfaces
31  */
32 static int create_composite_quirk(struct snd_usb_audio *chip,
33 				  struct usb_interface *iface,
34 				  struct usb_driver *driver,
35 				  const struct snd_usb_audio_quirk *quirk_comp)
36 {
37 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
38 	const struct snd_usb_audio_quirk *quirk;
39 	int err;
40 
41 	for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
42 		iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
43 		if (!iface)
44 			continue;
45 		if (quirk->ifnum != probed_ifnum &&
46 		    usb_interface_claimed(iface))
47 			continue;
48 		err = snd_usb_create_quirk(chip, iface, driver, quirk);
49 		if (err < 0)
50 			return err;
51 	}
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 			err = usb_driver_claim_interface(driver, iface,
60 							 USB_AUDIO_IFACE_UNUSED);
61 			if (err < 0)
62 				return err;
63 		}
64 	}
65 
66 	return 0;
67 }
68 
69 static int ignore_interface_quirk(struct snd_usb_audio *chip,
70 				  struct usb_interface *iface,
71 				  struct usb_driver *driver,
72 				  const struct snd_usb_audio_quirk *quirk)
73 {
74 	return 0;
75 }
76 
77 
78 /*
79  * Allow alignment on audio sub-slot (channel samples) rather than
80  * on audio slots (audio frames)
81  */
82 static int create_align_transfer_quirk(struct snd_usb_audio *chip,
83 				       struct usb_interface *iface,
84 				       struct usb_driver *driver,
85 				       const struct snd_usb_audio_quirk *quirk)
86 {
87 	chip->txfr_quirk = 1;
88 	return 1;	/* Continue with creating streams and mixer */
89 }
90 
91 static int create_any_midi_quirk(struct snd_usb_audio *chip,
92 				 struct usb_interface *intf,
93 				 struct usb_driver *driver,
94 				 const struct snd_usb_audio_quirk *quirk)
95 {
96 	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
97 }
98 
99 /*
100  * create a stream for an interface with proper descriptors
101  */
102 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
103 				       struct usb_interface *iface,
104 				       struct usb_driver *driver,
105 				       const struct snd_usb_audio_quirk *quirk)
106 {
107 	struct usb_host_interface *alts;
108 	struct usb_interface_descriptor *altsd;
109 	int err;
110 
111 	if (chip->usb_id == USB_ID(0x1686, 0x00dd)) /* Zoom R16/24 */
112 		chip->tx_length_quirk = 1;
113 
114 	alts = &iface->altsetting[0];
115 	altsd = get_iface_desc(alts);
116 	err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
117 	if (err < 0) {
118 		usb_audio_err(chip, "cannot setup if %d: error %d\n",
119 			   altsd->bInterfaceNumber, err);
120 		return err;
121 	}
122 	/* reset the current interface */
123 	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
124 	return 0;
125 }
126 
127 /* create the audio stream and the corresponding endpoints from the fixed
128  * audioformat object; this is used for quirks with the fixed EPs
129  */
130 static int add_audio_stream_from_fixed_fmt(struct snd_usb_audio *chip,
131 					   struct audioformat *fp)
132 {
133 	int stream, err;
134 
135 	stream = (fp->endpoint & USB_DIR_IN) ?
136 		SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
137 
138 	snd_usb_audioformat_set_sync_ep(chip, fp);
139 
140 	err = snd_usb_add_audio_stream(chip, stream, fp);
141 	if (err < 0)
142 		return err;
143 
144 	err = snd_usb_add_endpoint(chip, fp->endpoint,
145 				   SND_USB_ENDPOINT_TYPE_DATA);
146 	if (err < 0)
147 		return err;
148 
149 	if (fp->sync_ep) {
150 		err = snd_usb_add_endpoint(chip, fp->sync_ep,
151 					   fp->implicit_fb ?
152 					   SND_USB_ENDPOINT_TYPE_DATA :
153 					   SND_USB_ENDPOINT_TYPE_SYNC);
154 		if (err < 0)
155 			return err;
156 	}
157 
158 	return 0;
159 }
160 
161 /*
162  * create a stream for an endpoint/altsetting without proper descriptors
163  */
164 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
165 				     struct usb_interface *iface,
166 				     struct usb_driver *driver,
167 				     const struct snd_usb_audio_quirk *quirk)
168 {
169 	struct audioformat *fp;
170 	struct usb_host_interface *alts;
171 	struct usb_interface_descriptor *altsd;
172 	unsigned *rate_table = NULL;
173 	int err;
174 
175 	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
176 	if (!fp)
177 		return -ENOMEM;
178 
179 	INIT_LIST_HEAD(&fp->list);
180 	if (fp->nr_rates > MAX_NR_RATES) {
181 		kfree(fp);
182 		return -EINVAL;
183 	}
184 	if (fp->nr_rates > 0) {
185 		rate_table = kmemdup(fp->rate_table,
186 				     sizeof(int) * fp->nr_rates, GFP_KERNEL);
187 		if (!rate_table) {
188 			kfree(fp);
189 			return -ENOMEM;
190 		}
191 		fp->rate_table = rate_table;
192 	}
193 
194 	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
195 	    fp->altset_idx >= iface->num_altsetting) {
196 		err = -EINVAL;
197 		goto error;
198 	}
199 	alts = &iface->altsetting[fp->altset_idx];
200 	altsd = get_iface_desc(alts);
201 	if (altsd->bNumEndpoints <= fp->ep_idx) {
202 		err = -EINVAL;
203 		goto error;
204 	}
205 
206 	fp->protocol = altsd->bInterfaceProtocol;
207 
208 	if (fp->datainterval == 0)
209 		fp->datainterval = snd_usb_parse_datainterval(chip, alts);
210 	if (fp->maxpacksize == 0)
211 		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, fp->ep_idx)->wMaxPacketSize);
212 	if (!fp->fmt_type)
213 		fp->fmt_type = UAC_FORMAT_TYPE_I;
214 
215 	err = add_audio_stream_from_fixed_fmt(chip, fp);
216 	if (err < 0)
217 		goto error;
218 
219 	usb_set_interface(chip->dev, fp->iface, 0);
220 	snd_usb_init_pitch(chip, fp);
221 	snd_usb_init_sample_rate(chip, fp, fp->rate_max);
222 	return 0;
223 
224  error:
225 	list_del(&fp->list); /* unlink for avoiding double-free */
226 	kfree(fp);
227 	kfree(rate_table);
228 	return err;
229 }
230 
231 static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
232 				 struct usb_interface *iface,
233 				 struct usb_driver *driver)
234 {
235 	struct usb_host_interface *alts;
236 	struct usb_interface_descriptor *altsd;
237 	struct usb_endpoint_descriptor *epd;
238 	struct uac1_as_header_descriptor *ashd;
239 	struct uac_format_type_i_discrete_descriptor *fmtd;
240 
241 	/*
242 	 * Most Roland/Yamaha audio streaming interfaces have more or less
243 	 * standard descriptors, but older devices might lack descriptors, and
244 	 * future ones might change, so ensure that we fail silently if the
245 	 * interface doesn't look exactly right.
246 	 */
247 
248 	/* must have a non-zero altsetting for streaming */
249 	if (iface->num_altsetting < 2)
250 		return -ENODEV;
251 	alts = &iface->altsetting[1];
252 	altsd = get_iface_desc(alts);
253 
254 	/* must have an isochronous endpoint for streaming */
255 	if (altsd->bNumEndpoints < 1)
256 		return -ENODEV;
257 	epd = get_endpoint(alts, 0);
258 	if (!usb_endpoint_xfer_isoc(epd))
259 		return -ENODEV;
260 
261 	/* must have format descriptors */
262 	ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
263 				       UAC_AS_GENERAL);
264 	fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
265 				       UAC_FORMAT_TYPE);
266 	if (!ashd || ashd->bLength < 7 ||
267 	    !fmtd || fmtd->bLength < 8)
268 		return -ENODEV;
269 
270 	return create_standard_audio_quirk(chip, iface, driver, NULL);
271 }
272 
273 static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
274 				    struct usb_interface *iface,
275 				    struct usb_driver *driver,
276 				    struct usb_host_interface *alts)
277 {
278 	static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
279 		.type = QUIRK_MIDI_YAMAHA
280 	};
281 	struct usb_midi_in_jack_descriptor *injd;
282 	struct usb_midi_out_jack_descriptor *outjd;
283 
284 	/* must have some valid jack descriptors */
285 	injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
286 				       NULL, USB_MS_MIDI_IN_JACK);
287 	outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
288 					NULL, USB_MS_MIDI_OUT_JACK);
289 	if (!injd && !outjd)
290 		return -ENODEV;
291 	if ((injd && !snd_usb_validate_midi_desc(injd)) ||
292 	    (outjd && !snd_usb_validate_midi_desc(outjd)))
293 		return -ENODEV;
294 	if (injd && (injd->bLength < 5 ||
295 		     (injd->bJackType != USB_MS_EMBEDDED &&
296 		      injd->bJackType != USB_MS_EXTERNAL)))
297 		return -ENODEV;
298 	if (outjd && (outjd->bLength < 6 ||
299 		      (outjd->bJackType != USB_MS_EMBEDDED &&
300 		       outjd->bJackType != USB_MS_EXTERNAL)))
301 		return -ENODEV;
302 	return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
303 }
304 
305 static int create_roland_midi_quirk(struct snd_usb_audio *chip,
306 				    struct usb_interface *iface,
307 				    struct usb_driver *driver,
308 				    struct usb_host_interface *alts)
309 {
310 	static const struct snd_usb_audio_quirk roland_midi_quirk = {
311 		.type = QUIRK_MIDI_ROLAND
312 	};
313 	u8 *roland_desc = NULL;
314 
315 	/* might have a vendor-specific descriptor <06 24 F1 02 ...> */
316 	for (;;) {
317 		roland_desc = snd_usb_find_csint_desc(alts->extra,
318 						      alts->extralen,
319 						      roland_desc, 0xf1);
320 		if (!roland_desc)
321 			return -ENODEV;
322 		if (roland_desc[0] < 6 || roland_desc[3] != 2)
323 			continue;
324 		return create_any_midi_quirk(chip, iface, driver,
325 					     &roland_midi_quirk);
326 	}
327 }
328 
329 static int create_std_midi_quirk(struct snd_usb_audio *chip,
330 				 struct usb_interface *iface,
331 				 struct usb_driver *driver,
332 				 struct usb_host_interface *alts)
333 {
334 	struct usb_ms_header_descriptor *mshd;
335 	struct usb_ms_endpoint_descriptor *msepd;
336 
337 	/* must have the MIDIStreaming interface header descriptor*/
338 	mshd = (struct usb_ms_header_descriptor *)alts->extra;
339 	if (alts->extralen < 7 ||
340 	    mshd->bLength < 7 ||
341 	    mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
342 	    mshd->bDescriptorSubtype != USB_MS_HEADER)
343 		return -ENODEV;
344 	/* must have the MIDIStreaming endpoint descriptor*/
345 	msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
346 	if (alts->endpoint[0].extralen < 4 ||
347 	    msepd->bLength < 4 ||
348 	    msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
349 	    msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
350 	    msepd->bNumEmbMIDIJack < 1 ||
351 	    msepd->bNumEmbMIDIJack > 16)
352 		return -ENODEV;
353 
354 	return create_any_midi_quirk(chip, iface, driver, NULL);
355 }
356 
357 static int create_auto_midi_quirk(struct snd_usb_audio *chip,
358 				  struct usb_interface *iface,
359 				  struct usb_driver *driver)
360 {
361 	struct usb_host_interface *alts;
362 	struct usb_interface_descriptor *altsd;
363 	struct usb_endpoint_descriptor *epd;
364 	int err;
365 
366 	alts = &iface->altsetting[0];
367 	altsd = get_iface_desc(alts);
368 
369 	/* must have at least one bulk/interrupt endpoint for streaming */
370 	if (altsd->bNumEndpoints < 1)
371 		return -ENODEV;
372 	epd = get_endpoint(alts, 0);
373 	if (!usb_endpoint_xfer_bulk(epd) &&
374 	    !usb_endpoint_xfer_int(epd))
375 		return -ENODEV;
376 
377 	switch (USB_ID_VENDOR(chip->usb_id)) {
378 	case 0x0499: /* Yamaha */
379 		err = create_yamaha_midi_quirk(chip, iface, driver, alts);
380 		if (err != -ENODEV)
381 			return err;
382 		break;
383 	case 0x0582: /* Roland */
384 		err = create_roland_midi_quirk(chip, iface, driver, alts);
385 		if (err != -ENODEV)
386 			return err;
387 		break;
388 	}
389 
390 	return create_std_midi_quirk(chip, iface, driver, alts);
391 }
392 
393 static int create_autodetect_quirk(struct snd_usb_audio *chip,
394 				   struct usb_interface *iface,
395 				   struct usb_driver *driver)
396 {
397 	int err;
398 
399 	err = create_auto_pcm_quirk(chip, iface, driver);
400 	if (err == -ENODEV)
401 		err = create_auto_midi_quirk(chip, iface, driver);
402 	return err;
403 }
404 
405 static int create_autodetect_quirks(struct snd_usb_audio *chip,
406 				    struct usb_interface *iface,
407 				    struct usb_driver *driver,
408 				    const struct snd_usb_audio_quirk *quirk)
409 {
410 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
411 	int ifcount, ifnum, err;
412 
413 	err = create_autodetect_quirk(chip, iface, driver);
414 	if (err < 0)
415 		return err;
416 
417 	/*
418 	 * ALSA PCM playback/capture devices cannot be registered in two steps,
419 	 * so we have to claim the other corresponding interface here.
420 	 */
421 	ifcount = chip->dev->actconfig->desc.bNumInterfaces;
422 	for (ifnum = 0; ifnum < ifcount; ifnum++) {
423 		if (ifnum == probed_ifnum || quirk->ifnum >= 0)
424 			continue;
425 		iface = usb_ifnum_to_if(chip->dev, ifnum);
426 		if (!iface ||
427 		    usb_interface_claimed(iface) ||
428 		    get_iface_desc(iface->altsetting)->bInterfaceClass !=
429 							USB_CLASS_VENDOR_SPEC)
430 			continue;
431 
432 		err = create_autodetect_quirk(chip, iface, driver);
433 		if (err >= 0) {
434 			err = usb_driver_claim_interface(driver, iface,
435 							 USB_AUDIO_IFACE_UNUSED);
436 			if (err < 0)
437 				return err;
438 		}
439 	}
440 
441 	return 0;
442 }
443 
444 /*
445  * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
446  * The only way to detect the sample rate is by looking at wMaxPacketSize.
447  */
448 static int create_uaxx_quirk(struct snd_usb_audio *chip,
449 			     struct usb_interface *iface,
450 			     struct usb_driver *driver,
451 			     const struct snd_usb_audio_quirk *quirk)
452 {
453 	static const struct audioformat ua_format = {
454 		.formats = SNDRV_PCM_FMTBIT_S24_3LE,
455 		.channels = 2,
456 		.fmt_type = UAC_FORMAT_TYPE_I,
457 		.altsetting = 1,
458 		.altset_idx = 1,
459 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
460 	};
461 	struct usb_host_interface *alts;
462 	struct usb_interface_descriptor *altsd;
463 	struct audioformat *fp;
464 	int err;
465 
466 	/* both PCM and MIDI interfaces have 2 or more altsettings */
467 	if (iface->num_altsetting < 2)
468 		return -ENXIO;
469 	alts = &iface->altsetting[1];
470 	altsd = get_iface_desc(alts);
471 
472 	if (altsd->bNumEndpoints == 2) {
473 		static const struct snd_usb_midi_endpoint_info ua700_ep = {
474 			.out_cables = 0x0003,
475 			.in_cables  = 0x0003
476 		};
477 		static const struct snd_usb_audio_quirk ua700_quirk = {
478 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
479 			.data = &ua700_ep
480 		};
481 		static const struct snd_usb_midi_endpoint_info uaxx_ep = {
482 			.out_cables = 0x0001,
483 			.in_cables  = 0x0001
484 		};
485 		static const struct snd_usb_audio_quirk uaxx_quirk = {
486 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
487 			.data = &uaxx_ep
488 		};
489 		const struct snd_usb_audio_quirk *quirk =
490 			chip->usb_id == USB_ID(0x0582, 0x002b)
491 			? &ua700_quirk : &uaxx_quirk;
492 		return __snd_usbmidi_create(chip->card, iface,
493 					  &chip->midi_list, quirk,
494 					  chip->usb_id);
495 	}
496 
497 	if (altsd->bNumEndpoints != 1)
498 		return -ENXIO;
499 
500 	fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
501 	if (!fp)
502 		return -ENOMEM;
503 
504 	fp->iface = altsd->bInterfaceNumber;
505 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
506 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
507 	fp->datainterval = 0;
508 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
509 	INIT_LIST_HEAD(&fp->list);
510 
511 	switch (fp->maxpacksize) {
512 	case 0x120:
513 		fp->rate_max = fp->rate_min = 44100;
514 		break;
515 	case 0x138:
516 	case 0x140:
517 		fp->rate_max = fp->rate_min = 48000;
518 		break;
519 	case 0x258:
520 	case 0x260:
521 		fp->rate_max = fp->rate_min = 96000;
522 		break;
523 	default:
524 		usb_audio_err(chip, "unknown sample rate\n");
525 		kfree(fp);
526 		return -ENXIO;
527 	}
528 
529 	err = add_audio_stream_from_fixed_fmt(chip, fp);
530 	if (err < 0) {
531 		list_del(&fp->list); /* unlink for avoiding double-free */
532 		kfree(fp);
533 		return err;
534 	}
535 	usb_set_interface(chip->dev, fp->iface, 0);
536 	return 0;
537 }
538 
539 /*
540  * Create a standard mixer for the specified interface.
541  */
542 static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
543 				       struct usb_interface *iface,
544 				       struct usb_driver *driver,
545 				       const struct snd_usb_audio_quirk *quirk)
546 {
547 	if (quirk->ifnum < 0)
548 		return 0;
549 
550 	return snd_usb_create_mixer(chip, quirk->ifnum, 0);
551 }
552 
553 static int setup_disable_autosuspend(struct snd_usb_audio *chip,
554 				       struct usb_interface *iface,
555 				       struct usb_driver *driver,
556 				       const struct snd_usb_audio_quirk *quirk)
557 {
558 	usb_disable_autosuspend(interface_to_usbdev(iface));
559 	return 1;	/* Continue with creating streams and mixer */
560 }
561 
562 /*
563  * audio-interface quirks
564  *
565  * returns zero if no standard audio/MIDI parsing is needed.
566  * returns a positive value if standard audio/midi interfaces are parsed
567  * after this.
568  * returns a negative value at error.
569  */
570 int snd_usb_create_quirk(struct snd_usb_audio *chip,
571 			 struct usb_interface *iface,
572 			 struct usb_driver *driver,
573 			 const struct snd_usb_audio_quirk *quirk)
574 {
575 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
576 				    struct usb_interface *,
577 				    struct usb_driver *,
578 				    const struct snd_usb_audio_quirk *);
579 	static const quirk_func_t quirk_funcs[] = {
580 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
581 		[QUIRK_COMPOSITE] = create_composite_quirk,
582 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
583 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
584 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
585 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
586 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
587 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
588 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
589 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
590 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
591 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
592 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
593 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
594 		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
595 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
596 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
597 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
598 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
599 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
600 		[QUIRK_SETUP_DISABLE_AUTOSUSPEND] = setup_disable_autosuspend,
601 	};
602 
603 	if (quirk->type < QUIRK_TYPE_COUNT) {
604 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
605 	} else {
606 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
607 		return -ENXIO;
608 	}
609 }
610 
611 /*
612  * boot quirks
613  */
614 
615 #define EXTIGY_FIRMWARE_SIZE_OLD 794
616 #define EXTIGY_FIRMWARE_SIZE_NEW 483
617 
618 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
619 {
620 	struct usb_host_config *config = dev->actconfig;
621 	int err;
622 
623 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
624 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
625 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
626 		/* Send message to force it to reconnect with full interface. */
627 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
628 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
629 		if (err < 0)
630 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
631 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
632 				&dev->descriptor, sizeof(dev->descriptor));
633 		config = dev->actconfig;
634 		if (err < 0)
635 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
636 		err = usb_reset_configuration(dev);
637 		if (err < 0)
638 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
639 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
640 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
641 		return -ENODEV; /* quit this anyway */
642 	}
643 	return 0;
644 }
645 
646 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
647 {
648 	u8 buf = 1;
649 
650 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
651 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
652 			0, 0, &buf, 1);
653 	if (buf == 0) {
654 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
655 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
656 				1, 2000, NULL, 0);
657 		return -ENODEV;
658 	}
659 	return 0;
660 }
661 
662 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
663 {
664 	int err;
665 
666 	if (dev->actconfig->desc.bConfigurationValue == 1) {
667 		dev_info(&dev->dev,
668 			   "Fast Track Pro switching to config #2\n");
669 		/* This function has to be available by the usb core module.
670 		 * if it is not avialable the boot quirk has to be left out
671 		 * and the configuration has to be set by udev or hotplug
672 		 * rules
673 		 */
674 		err = usb_driver_set_configuration(dev, 2);
675 		if (err < 0)
676 			dev_dbg(&dev->dev,
677 				"error usb_driver_set_configuration: %d\n",
678 				err);
679 		/* Always return an error, so that we stop creating a device
680 		   that will just be destroyed and recreated with a new
681 		   configuration */
682 		return -ENODEV;
683 	} else
684 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
685 
686 	return 0;
687 }
688 
689 /*
690  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
691  * documented in the device's data sheet.
692  */
693 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
694 {
695 	u8 buf[4];
696 	buf[0] = 0x20;
697 	buf[1] = value & 0xff;
698 	buf[2] = (value >> 8) & 0xff;
699 	buf[3] = reg;
700 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
701 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
702 			       0, 0, &buf, 4);
703 }
704 
705 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
706 {
707 	/*
708 	 * Enable line-out driver mode, set headphone source to front
709 	 * channels, enable stereo mic.
710 	 */
711 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
712 }
713 
714 /*
715  * CM6206 registers from the CM6206 datasheet rev 2.1
716  */
717 #define CM6206_REG0_DMA_MASTER BIT(15)
718 #define CM6206_REG0_SPDIFO_RATE_48K (2 << 12)
719 #define CM6206_REG0_SPDIFO_RATE_96K (7 << 12)
720 /* Bit 4 thru 11 is the S/PDIF category code */
721 #define CM6206_REG0_SPDIFO_CAT_CODE_GENERAL (0 << 4)
722 #define CM6206_REG0_SPDIFO_EMPHASIS_CD BIT(3)
723 #define CM6206_REG0_SPDIFO_COPYRIGHT_NA BIT(2)
724 #define CM6206_REG0_SPDIFO_NON_AUDIO BIT(1)
725 #define CM6206_REG0_SPDIFO_PRO_FORMAT BIT(0)
726 
727 #define CM6206_REG1_TEST_SEL_CLK BIT(14)
728 #define CM6206_REG1_PLLBIN_EN BIT(13)
729 #define CM6206_REG1_SOFT_MUTE_EN BIT(12)
730 #define CM6206_REG1_GPIO4_OUT BIT(11)
731 #define CM6206_REG1_GPIO4_OE BIT(10)
732 #define CM6206_REG1_GPIO3_OUT BIT(9)
733 #define CM6206_REG1_GPIO3_OE BIT(8)
734 #define CM6206_REG1_GPIO2_OUT BIT(7)
735 #define CM6206_REG1_GPIO2_OE BIT(6)
736 #define CM6206_REG1_GPIO1_OUT BIT(5)
737 #define CM6206_REG1_GPIO1_OE BIT(4)
738 #define CM6206_REG1_SPDIFO_INVALID BIT(3)
739 #define CM6206_REG1_SPDIF_LOOP_EN BIT(2)
740 #define CM6206_REG1_SPDIFO_DIS BIT(1)
741 #define CM6206_REG1_SPDIFI_MIX BIT(0)
742 
743 #define CM6206_REG2_DRIVER_ON BIT(15)
744 #define CM6206_REG2_HEADP_SEL_SIDE_CHANNELS (0 << 13)
745 #define CM6206_REG2_HEADP_SEL_SURROUND_CHANNELS (1 << 13)
746 #define CM6206_REG2_HEADP_SEL_CENTER_SUBW (2 << 13)
747 #define CM6206_REG2_HEADP_SEL_FRONT_CHANNELS (3 << 13)
748 #define CM6206_REG2_MUTE_HEADPHONE_RIGHT BIT(12)
749 #define CM6206_REG2_MUTE_HEADPHONE_LEFT BIT(11)
750 #define CM6206_REG2_MUTE_REAR_SURROUND_RIGHT BIT(10)
751 #define CM6206_REG2_MUTE_REAR_SURROUND_LEFT BIT(9)
752 #define CM6206_REG2_MUTE_SIDE_SURROUND_RIGHT BIT(8)
753 #define CM6206_REG2_MUTE_SIDE_SURROUND_LEFT BIT(7)
754 #define CM6206_REG2_MUTE_SUBWOOFER BIT(6)
755 #define CM6206_REG2_MUTE_CENTER BIT(5)
756 #define CM6206_REG2_MUTE_RIGHT_FRONT BIT(3)
757 #define CM6206_REG2_MUTE_LEFT_FRONT BIT(3)
758 #define CM6206_REG2_EN_BTL BIT(2)
759 #define CM6206_REG2_MCUCLKSEL_1_5_MHZ (0)
760 #define CM6206_REG2_MCUCLKSEL_3_MHZ (1)
761 #define CM6206_REG2_MCUCLKSEL_6_MHZ (2)
762 #define CM6206_REG2_MCUCLKSEL_12_MHZ (3)
763 
764 /* Bit 11..13 sets the sensitivity to FLY tuner volume control VP/VD signal */
765 #define CM6206_REG3_FLYSPEED_DEFAULT (2 << 11)
766 #define CM6206_REG3_VRAP25EN BIT(10)
767 #define CM6206_REG3_MSEL1 BIT(9)
768 #define CM6206_REG3_SPDIFI_RATE_44_1K BIT(0 << 7)
769 #define CM6206_REG3_SPDIFI_RATE_48K BIT(2 << 7)
770 #define CM6206_REG3_SPDIFI_RATE_32K BIT(3 << 7)
771 #define CM6206_REG3_PINSEL BIT(6)
772 #define CM6206_REG3_FOE BIT(5)
773 #define CM6206_REG3_ROE BIT(4)
774 #define CM6206_REG3_CBOE BIT(3)
775 #define CM6206_REG3_LOSE BIT(2)
776 #define CM6206_REG3_HPOE BIT(1)
777 #define CM6206_REG3_SPDIFI_CANREC BIT(0)
778 
779 #define CM6206_REG5_DA_RSTN BIT(13)
780 #define CM6206_REG5_AD_RSTN BIT(12)
781 #define CM6206_REG5_SPDIFO_AD2SPDO BIT(12)
782 #define CM6206_REG5_SPDIFO_SEL_FRONT (0 << 9)
783 #define CM6206_REG5_SPDIFO_SEL_SIDE_SUR (1 << 9)
784 #define CM6206_REG5_SPDIFO_SEL_CEN_LFE (2 << 9)
785 #define CM6206_REG5_SPDIFO_SEL_REAR_SUR (3 << 9)
786 #define CM6206_REG5_CODECM BIT(8)
787 #define CM6206_REG5_EN_HPF BIT(7)
788 #define CM6206_REG5_T_SEL_DSDA4 BIT(6)
789 #define CM6206_REG5_T_SEL_DSDA3 BIT(5)
790 #define CM6206_REG5_T_SEL_DSDA2 BIT(4)
791 #define CM6206_REG5_T_SEL_DSDA1 BIT(3)
792 #define CM6206_REG5_T_SEL_DSDAD_NORMAL 0
793 #define CM6206_REG5_T_SEL_DSDAD_FRONT 4
794 #define CM6206_REG5_T_SEL_DSDAD_S_SURROUND 5
795 #define CM6206_REG5_T_SEL_DSDAD_CEN_LFE 6
796 #define CM6206_REG5_T_SEL_DSDAD_R_SURROUND 7
797 
798 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
799 {
800 	int err  = 0, reg;
801 	int val[] = {
802 		/*
803 		 * Values here are chosen based on sniffing USB traffic
804 		 * under Windows.
805 		 *
806 		 * REG0: DAC is master, sample rate 48kHz, no copyright
807 		 */
808 		CM6206_REG0_SPDIFO_RATE_48K |
809 		CM6206_REG0_SPDIFO_COPYRIGHT_NA,
810 		/*
811 		 * REG1: PLL binary search enable, soft mute enable.
812 		 */
813 		CM6206_REG1_PLLBIN_EN |
814 		CM6206_REG1_SOFT_MUTE_EN,
815 		/*
816 		 * REG2: enable output drivers,
817 		 * select front channels to the headphone output,
818 		 * then mute the headphone channels, run the MCU
819 		 * at 1.5 MHz.
820 		 */
821 		CM6206_REG2_DRIVER_ON |
822 		CM6206_REG2_HEADP_SEL_FRONT_CHANNELS |
823 		CM6206_REG2_MUTE_HEADPHONE_RIGHT |
824 		CM6206_REG2_MUTE_HEADPHONE_LEFT,
825 		/*
826 		 * REG3: default flyspeed, set 2.5V mic bias
827 		 * enable all line out ports and enable SPDIF
828 		 */
829 		CM6206_REG3_FLYSPEED_DEFAULT |
830 		CM6206_REG3_VRAP25EN |
831 		CM6206_REG3_FOE |
832 		CM6206_REG3_ROE |
833 		CM6206_REG3_CBOE |
834 		CM6206_REG3_LOSE |
835 		CM6206_REG3_HPOE |
836 		CM6206_REG3_SPDIFI_CANREC,
837 		/* REG4 is just a bunch of GPIO lines */
838 		0x0000,
839 		/* REG5: de-assert AD/DA reset signals */
840 		CM6206_REG5_DA_RSTN |
841 		CM6206_REG5_AD_RSTN };
842 
843 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
844 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
845 		if (err < 0)
846 			return err;
847 	}
848 
849 	return err;
850 }
851 
852 /* quirk for Plantronics GameCom 780 with CM6302 chip */
853 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
854 {
855 	/* set the initial volume and don't change; other values are either
856 	 * too loud or silent due to firmware bug (bko#65251)
857 	 */
858 	u8 buf[2] = { 0x74, 0xe3 };
859 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
860 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
861 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
862 }
863 
864 /*
865  * Novation Twitch DJ controller
866  * Focusrite Novation Saffire 6 USB audio card
867  */
868 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
869 {
870 	/* preemptively set up the device because otherwise the
871 	 * raw MIDI endpoints are not active */
872 	usb_set_interface(dev, 0, 1);
873 	return 0;
874 }
875 
876 /*
877  * This call will put the synth in "USB send" mode, i.e it will send MIDI
878  * messages through USB (this is disabled at startup). The synth will
879  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
880  * sign on its LCD. Values here are chosen based on sniffing USB traffic
881  * under Windows.
882  */
883 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
884 {
885 	int err, actual_length;
886 	/* "midi send" enable */
887 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
888 	void *buf;
889 
890 	if (usb_pipe_type_check(dev, usb_sndintpipe(dev, 0x05)))
891 		return -EINVAL;
892 	buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
893 	if (!buf)
894 		return -ENOMEM;
895 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
896 			ARRAY_SIZE(seq), &actual_length, 1000);
897 	kfree(buf);
898 	if (err < 0)
899 		return err;
900 
901 	return 0;
902 }
903 
904 /*
905  * Some sound cards from Native Instruments are in fact compliant to the USB
906  * audio standard of version 2 and other approved USB standards, even though
907  * they come up as vendor-specific device when first connected.
908  *
909  * However, they can be told to come up with a new set of descriptors
910  * upon their next enumeration, and the interfaces announced by the new
911  * descriptors will then be handled by the kernel's class drivers. As the
912  * product ID will also change, no further checks are required.
913  */
914 
915 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
916 {
917 	int ret;
918 
919 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
920 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
921 				  1, 0, NULL, 0, 1000);
922 
923 	if (ret < 0)
924 		return ret;
925 
926 	usb_reset_device(dev);
927 
928 	/* return -EAGAIN, so the creation of an audio interface for this
929 	 * temporary device is aborted. The device will reconnect with a
930 	 * new product ID */
931 	return -EAGAIN;
932 }
933 
934 static void mbox2_setup_48_24_magic(struct usb_device *dev)
935 {
936 	u8 srate[3];
937 	u8 temp[12];
938 
939 	/* Choose 48000Hz permanently */
940 	srate[0] = 0x80;
941 	srate[1] = 0xbb;
942 	srate[2] = 0x00;
943 
944 	/* Send the magic! */
945 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
946 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
947 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
948 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
949 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
950 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
951 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
952 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
953 	return;
954 }
955 
956 /* Digidesign Mbox 2 needs to load firmware onboard
957  * and driver must wait a few seconds for initialisation.
958  */
959 
960 #define MBOX2_FIRMWARE_SIZE    646
961 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
962 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
963 
964 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
965 {
966 	struct usb_host_config *config = dev->actconfig;
967 	int err;
968 	u8 bootresponse[0x12];
969 	int fwsize;
970 	int count;
971 
972 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
973 
974 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
975 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
976 		return -ENODEV;
977 	}
978 
979 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
980 
981 	count = 0;
982 	bootresponse[0] = MBOX2_BOOT_LOADING;
983 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
984 		msleep(500); /* 0.5 second delay */
985 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
986 			/* Control magic - load onboard firmware */
987 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
988 		if (bootresponse[0] == MBOX2_BOOT_READY)
989 			break;
990 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
991 		count++;
992 	}
993 
994 	if (bootresponse[0] != MBOX2_BOOT_READY) {
995 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
996 		return -ENODEV;
997 	}
998 
999 	dev_dbg(&dev->dev, "device initialised!\n");
1000 
1001 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
1002 		&dev->descriptor, sizeof(dev->descriptor));
1003 	config = dev->actconfig;
1004 	if (err < 0)
1005 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
1006 
1007 	err = usb_reset_configuration(dev);
1008 	if (err < 0)
1009 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
1010 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
1011 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
1012 
1013 	mbox2_setup_48_24_magic(dev);
1014 
1015 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
1016 
1017 	return 0; /* Successful boot */
1018 }
1019 
1020 static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
1021 {
1022 	int err;
1023 
1024 	dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
1025 
1026 	/* If the Axe-Fx III has not fully booted, it will timeout when trying
1027 	 * to enable the audio streaming interface. A more generous timeout is
1028 	 * used here to detect when the Axe-Fx III has finished booting as the
1029 	 * set interface message will be acked once it has
1030 	 */
1031 	err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1032 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
1033 				1, 1, NULL, 0, 120000);
1034 	if (err < 0) {
1035 		dev_err(&dev->dev,
1036 			"failed waiting for Axe-Fx III to boot: %d\n", err);
1037 		return err;
1038 	}
1039 
1040 	dev_dbg(&dev->dev, "Axe-Fx III is now ready\n");
1041 
1042 	err = usb_set_interface(dev, 1, 0);
1043 	if (err < 0)
1044 		dev_dbg(&dev->dev,
1045 			"error stopping Axe-Fx III interface: %d\n", err);
1046 
1047 	return 0;
1048 }
1049 
1050 
1051 #define MICROBOOK_BUF_SIZE 128
1052 
1053 static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
1054 						int buf_size, int *length)
1055 {
1056 	int err, actual_length;
1057 
1058 	if (usb_pipe_type_check(dev, usb_sndintpipe(dev, 0x01)))
1059 		return -EINVAL;
1060 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x01), buf, *length,
1061 				&actual_length, 1000);
1062 	if (err < 0)
1063 		return err;
1064 
1065 	print_hex_dump(KERN_DEBUG, "MicroBookII snd: ", DUMP_PREFIX_NONE, 16, 1,
1066 		       buf, actual_length, false);
1067 
1068 	memset(buf, 0, buf_size);
1069 
1070 	if (usb_pipe_type_check(dev, usb_rcvintpipe(dev, 0x82)))
1071 		return -EINVAL;
1072 	err = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 0x82), buf, buf_size,
1073 				&actual_length, 1000);
1074 	if (err < 0)
1075 		return err;
1076 
1077 	print_hex_dump(KERN_DEBUG, "MicroBookII rcv: ", DUMP_PREFIX_NONE, 16, 1,
1078 		       buf, actual_length, false);
1079 
1080 	*length = actual_length;
1081 	return 0;
1082 }
1083 
1084 static int snd_usb_motu_microbookii_boot_quirk(struct usb_device *dev)
1085 {
1086 	int err, actual_length, poll_attempts = 0;
1087 	static const u8 set_samplerate_seq[] = { 0x00, 0x00, 0x00, 0x00,
1088 						 0x00, 0x00, 0x0b, 0x14,
1089 						 0x00, 0x00, 0x00, 0x01 };
1090 	static const u8 poll_ready_seq[] = { 0x00, 0x04, 0x00, 0x00,
1091 					     0x00, 0x00, 0x0b, 0x18 };
1092 	u8 *buf = kzalloc(MICROBOOK_BUF_SIZE, GFP_KERNEL);
1093 
1094 	if (!buf)
1095 		return -ENOMEM;
1096 
1097 	dev_info(&dev->dev, "Waiting for MOTU Microbook II to boot up...\n");
1098 
1099 	/* First we tell the device which sample rate to use. */
1100 	memcpy(buf, set_samplerate_seq, sizeof(set_samplerate_seq));
1101 	actual_length = sizeof(set_samplerate_seq);
1102 	err = snd_usb_motu_microbookii_communicate(dev, buf, MICROBOOK_BUF_SIZE,
1103 						   &actual_length);
1104 
1105 	if (err < 0) {
1106 		dev_err(&dev->dev,
1107 			"failed setting the sample rate for Motu MicroBook II: %d\n",
1108 			err);
1109 		goto free_buf;
1110 	}
1111 
1112 	/* Then we poll every 100 ms until the device informs of its readiness. */
1113 	while (true) {
1114 		if (++poll_attempts > 100) {
1115 			dev_err(&dev->dev,
1116 				"failed booting Motu MicroBook II: timeout\n");
1117 			err = -ENODEV;
1118 			goto free_buf;
1119 		}
1120 
1121 		memset(buf, 0, MICROBOOK_BUF_SIZE);
1122 		memcpy(buf, poll_ready_seq, sizeof(poll_ready_seq));
1123 
1124 		actual_length = sizeof(poll_ready_seq);
1125 		err = snd_usb_motu_microbookii_communicate(
1126 			dev, buf, MICROBOOK_BUF_SIZE, &actual_length);
1127 		if (err < 0) {
1128 			dev_err(&dev->dev,
1129 				"failed booting Motu MicroBook II: communication error %d\n",
1130 				err);
1131 			goto free_buf;
1132 		}
1133 
1134 		/* the device signals its readiness through a message of the
1135 		 * form
1136 		 *           XX 06 00 00 00 00 0b 18  00 00 00 01
1137 		 * If the device is not yet ready to accept audio data, the
1138 		 * last byte of that sequence is 00.
1139 		 */
1140 		if (actual_length == 12 && buf[actual_length - 1] == 1)
1141 			break;
1142 
1143 		msleep(100);
1144 	}
1145 
1146 	dev_info(&dev->dev, "MOTU MicroBook II ready\n");
1147 
1148 free_buf:
1149 	kfree(buf);
1150 	return err;
1151 }
1152 
1153 static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev)
1154 {
1155 	msleep(2000);
1156 
1157 	return 0;
1158 }
1159 
1160 /*
1161  * Setup quirks
1162  */
1163 #define MAUDIO_SET		0x01 /* parse device_setup */
1164 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
1165 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
1166 #define MAUDIO_SET_96K		0x04 /* 48-96kHz rate if set, 8-48kHz otherwise */
1167 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
1168 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
1169 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
1170 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48kHz+Digital Input */
1171 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48kHz+No Digital Input */
1172 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48kHz+Digital Input */
1173 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48kHz+No Digital Input */
1174 
1175 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
1176 				      int iface, int altno)
1177 {
1178 	/* Reset ALL ifaces to 0 altsetting.
1179 	 * Call it for every possible altsetting of every interface.
1180 	 */
1181 	usb_set_interface(chip->dev, iface, 0);
1182 	if (chip->setup & MAUDIO_SET) {
1183 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
1184 			if (iface != 1 && iface != 2)
1185 				return 1; /* skip all interfaces but 1 and 2 */
1186 		} else {
1187 			unsigned int mask;
1188 			if (iface == 1 || iface == 2)
1189 				return 1; /* skip interfaces 1 and 2 */
1190 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1191 				return 1; /* skip this altsetting */
1192 			mask = chip->setup & MAUDIO_SET_MASK;
1193 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1194 				return 1; /* skip this altsetting */
1195 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1196 				return 1; /* skip this altsetting */
1197 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
1198 				return 1; /* skip this altsetting */
1199 		}
1200 	}
1201 	usb_audio_dbg(chip,
1202 		    "using altsetting %d for interface %d config %d\n",
1203 		    altno, iface, chip->setup);
1204 	return 0; /* keep this altsetting */
1205 }
1206 
1207 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
1208 					 int iface,
1209 					 int altno)
1210 {
1211 	/* Reset ALL ifaces to 0 altsetting.
1212 	 * Call it for every possible altsetting of every interface.
1213 	 */
1214 	usb_set_interface(chip->dev, iface, 0);
1215 
1216 	if (chip->setup & MAUDIO_SET) {
1217 		unsigned int mask;
1218 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
1219 			return 1; /* skip this altsetting */
1220 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1221 			return 1; /* skip this altsetting */
1222 		mask = chip->setup & MAUDIO_SET_MASK;
1223 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1224 			return 1; /* skip this altsetting */
1225 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1226 			return 1; /* skip this altsetting */
1227 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
1228 			return 1; /* skip this altsetting */
1229 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
1230 			return 1; /* skip this altsetting */
1231 	}
1232 
1233 	return 0; /* keep this altsetting */
1234 }
1235 
1236 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
1237 					   int iface, int altno)
1238 {
1239 	/* Reset ALL ifaces to 0 altsetting.
1240 	 * Call it for every possible altsetting of every interface.
1241 	 */
1242 	usb_set_interface(chip->dev, iface, 0);
1243 
1244 	/* possible configuration where both inputs and only one output is
1245 	 *used is not supported by the current setup
1246 	 */
1247 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
1248 		if (chip->setup & MAUDIO_SET_96K) {
1249 			if (altno != 3 && altno != 6)
1250 				return 1;
1251 		} else if (chip->setup & MAUDIO_SET_DI) {
1252 			if (iface == 4)
1253 				return 1; /* no analog input */
1254 			if (altno != 2 && altno != 5)
1255 				return 1; /* enable only altsets 2 and 5 */
1256 		} else {
1257 			if (iface == 5)
1258 				return 1; /* disable digialt input */
1259 			if (altno != 2 && altno != 5)
1260 				return 1; /* enalbe only altsets 2 and 5 */
1261 		}
1262 	} else {
1263 		/* keep only 16-Bit mode */
1264 		if (altno != 1)
1265 			return 1;
1266 	}
1267 
1268 	usb_audio_dbg(chip,
1269 		    "using altsetting %d for interface %d config %d\n",
1270 		    altno, iface, chip->setup);
1271 	return 0; /* keep this altsetting */
1272 }
1273 
1274 static int s1810c_skip_setting_quirk(struct snd_usb_audio *chip,
1275 					   int iface, int altno)
1276 {
1277 	/*
1278 	 * Altno settings:
1279 	 *
1280 	 * Playback (Interface 1):
1281 	 * 1: 6 Analog + 2 S/PDIF
1282 	 * 2: 6 Analog + 2 S/PDIF
1283 	 * 3: 6 Analog
1284 	 *
1285 	 * Capture (Interface 2):
1286 	 * 1: 8 Analog + 2 S/PDIF + 8 ADAT
1287 	 * 2: 8 Analog + 2 S/PDIF + 4 ADAT
1288 	 * 3: 8 Analog
1289 	 */
1290 
1291 	/*
1292 	 * I'll leave 2 as the default one and
1293 	 * use device_setup to switch to the
1294 	 * other two.
1295 	 */
1296 	if ((chip->setup == 0 || chip->setup > 2) && altno != 2)
1297 		return 1;
1298 	else if (chip->setup == 1 && altno != 1)
1299 		return 1;
1300 	else if (chip->setup == 2 && altno != 3)
1301 		return 1;
1302 
1303 	return 0;
1304 }
1305 
1306 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
1307 				  int iface,
1308 				  int altno)
1309 {
1310 	/* audiophile usb: skip altsets incompatible with device_setup */
1311 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
1312 		return audiophile_skip_setting_quirk(chip, iface, altno);
1313 	/* quattro usb: skip altsets incompatible with device_setup */
1314 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
1315 		return quattro_skip_setting_quirk(chip, iface, altno);
1316 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
1317 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
1318 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
1319 	/* presonus studio 1810c: skip altsets incompatible with device_setup */
1320 	if (chip->usb_id == USB_ID(0x0194f, 0x010c))
1321 		return s1810c_skip_setting_quirk(chip, iface, altno);
1322 
1323 
1324 	return 0;
1325 }
1326 
1327 int snd_usb_apply_boot_quirk(struct usb_device *dev,
1328 			     struct usb_interface *intf,
1329 			     const struct snd_usb_audio_quirk *quirk,
1330 			     unsigned int id)
1331 {
1332 	switch (id) {
1333 	case USB_ID(0x041e, 0x3000):
1334 		/* SB Extigy needs special boot-up sequence */
1335 		/* if more models come, this will go to the quirk list. */
1336 		return snd_usb_extigy_boot_quirk(dev, intf);
1337 
1338 	case USB_ID(0x041e, 0x3020):
1339 		/* SB Audigy 2 NX needs its own boot-up magic, too */
1340 		return snd_usb_audigy2nx_boot_quirk(dev);
1341 
1342 	case USB_ID(0x10f5, 0x0200):
1343 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
1344 		return snd_usb_cm106_boot_quirk(dev);
1345 
1346 	case USB_ID(0x0d8c, 0x0102):
1347 		/* C-Media CM6206 / CM106-Like Sound Device */
1348 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
1349 		return snd_usb_cm6206_boot_quirk(dev);
1350 
1351 	case USB_ID(0x0dba, 0x3000):
1352 		/* Digidesign Mbox 2 */
1353 		return snd_usb_mbox2_boot_quirk(dev);
1354 
1355 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
1356 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
1357 		return snd_usb_novation_boot_quirk(dev);
1358 
1359 	case USB_ID(0x133e, 0x0815):
1360 		/* Access Music VirusTI Desktop */
1361 		return snd_usb_accessmusic_boot_quirk(dev);
1362 
1363 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1364 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1365 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1366 		return snd_usb_nativeinstruments_boot_quirk(dev);
1367 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1368 		return snd_usb_fasttrackpro_boot_quirk(dev);
1369 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1370 		return snd_usb_gamecon780_boot_quirk(dev);
1371 	case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx 3 */
1372 		return snd_usb_axefx3_boot_quirk(dev);
1373 	case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II */
1374 		/*
1375 		 * For some reason interface 3 with vendor-spec class is
1376 		 * detected on MicroBook IIc.
1377 		 */
1378 		if (get_iface_desc(intf->altsetting)->bInterfaceClass ==
1379 		    USB_CLASS_VENDOR_SPEC &&
1380 		    get_iface_desc(intf->altsetting)->bInterfaceNumber < 3)
1381 			return snd_usb_motu_microbookii_boot_quirk(dev);
1382 		break;
1383 	}
1384 
1385 	return 0;
1386 }
1387 
1388 int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
1389 				  struct usb_interface *intf,
1390 				  const struct snd_usb_audio_quirk *quirk,
1391 				  unsigned int id)
1392 {
1393 	switch (id) {
1394 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
1395 		return snd_usb_motu_m_series_boot_quirk(dev);
1396 	}
1397 
1398 	return 0;
1399 }
1400 
1401 /*
1402  * check if the device uses big-endian samples
1403  */
1404 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip,
1405 				 const struct audioformat *fp)
1406 {
1407 	/* it depends on altsetting whether the device is big-endian or not */
1408 	switch (chip->usb_id) {
1409 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1410 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1411 			fp->altsetting == 5 || fp->altsetting == 6)
1412 			return 1;
1413 		break;
1414 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1415 		if (chip->setup == 0x00 ||
1416 			fp->altsetting == 1 || fp->altsetting == 2 ||
1417 			fp->altsetting == 3)
1418 			return 1;
1419 		break;
1420 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1421 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1422 			fp->altsetting == 5 || fp->altsetting == 6)
1423 			return 1;
1424 		break;
1425 	}
1426 	return 0;
1427 }
1428 
1429 /*
1430  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1431  * not for interface.
1432  */
1433 
1434 enum {
1435 	EMU_QUIRK_SR_44100HZ = 0,
1436 	EMU_QUIRK_SR_48000HZ,
1437 	EMU_QUIRK_SR_88200HZ,
1438 	EMU_QUIRK_SR_96000HZ,
1439 	EMU_QUIRK_SR_176400HZ,
1440 	EMU_QUIRK_SR_192000HZ
1441 };
1442 
1443 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1444 				 const struct audioformat *fmt)
1445 {
1446 	unsigned char emu_samplerate_id = 0;
1447 
1448 	/* When capture is active
1449 	 * sample rate shouldn't be changed
1450 	 * by playback substream
1451 	 */
1452 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1453 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].cur_audiofmt)
1454 			return;
1455 	}
1456 
1457 	switch (fmt->rate_min) {
1458 	case 48000:
1459 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1460 		break;
1461 	case 88200:
1462 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1463 		break;
1464 	case 96000:
1465 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1466 		break;
1467 	case 176400:
1468 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1469 		break;
1470 	case 192000:
1471 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1472 		break;
1473 	default:
1474 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1475 		break;
1476 	}
1477 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1478 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1479 }
1480 
1481 static int pioneer_djm_set_format_quirk(struct snd_usb_substream *subs,
1482 					u16 windex)
1483 {
1484 	unsigned int cur_rate = subs->data_endpoint->cur_rate;
1485 	u8 sr[3];
1486 	// Convert to little endian
1487 	sr[0] = cur_rate & 0xff;
1488 	sr[1] = (cur_rate >> 8) & 0xff;
1489 	sr[2] = (cur_rate >> 16) & 0xff;
1490 	usb_set_interface(subs->dev, 0, 1);
1491 	// we should derive windex from fmt-sync_ep but it's not set
1492 	snd_usb_ctl_msg(subs->stream->chip->dev,
1493 		usb_sndctrlpipe(subs->stream->chip->dev, 0),
1494 		0x01, 0x22, 0x0100, windex, &sr, 0x0003);
1495 	return 0;
1496 }
1497 
1498 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1499 			      const struct audioformat *fmt)
1500 {
1501 	switch (subs->stream->chip->usb_id) {
1502 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1503 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1504 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1505 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1506 		set_format_emu_quirk(subs, fmt);
1507 		break;
1508 	case USB_ID(0x534d, 0x2109): /* MacroSilicon MS2109 */
1509 		subs->stream_offset_adj = 2;
1510 		break;
1511 	case USB_ID(0x2b73, 0x0013): /* Pioneer DJM-450 */
1512 		pioneer_djm_set_format_quirk(subs, 0x0082);
1513 		break;
1514 	case USB_ID(0x08e4, 0x017f): /* Pioneer DJM-750 */
1515 	case USB_ID(0x08e4, 0x0163): /* Pioneer DJM-850 */
1516 		pioneer_djm_set_format_quirk(subs, 0x0086);
1517 		break;
1518 	}
1519 }
1520 
1521 bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
1522 {
1523 	/* devices which do not support reading the sample rate. */
1524 	switch (chip->usb_id) {
1525 	case USB_ID(0x041e, 0x4080): /* Creative Live Cam VF0610 */
1526 	case USB_ID(0x04d8, 0xfeea): /* Benchmark DAC1 Pre */
1527 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
1528 	case USB_ID(0x05a3, 0x9420): /* ELP HD USB Camera */
1529 	case USB_ID(0x05a7, 0x1020): /* Bose Companion 5 */
1530 	case USB_ID(0x074d, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
1531 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
1532 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
1533 	case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
1534 	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
1535 	case USB_ID(0x413c, 0xa506): /* Dell AE515 sound bar */
1536 	case USB_ID(0x046d, 0x084c): /* Logitech ConferenceCam Connect */
1537 		return true;
1538 	}
1539 
1540 	/* devices of these vendors don't support reading rate, either */
1541 	switch (USB_ID_VENDOR(chip->usb_id)) {
1542 	case 0x045e: /* MS Lifecam */
1543 	case 0x047f: /* Plantronics */
1544 	case 0x1de7: /* Phoenix Audio */
1545 		return true;
1546 	}
1547 
1548 	return false;
1549 }
1550 
1551 /* ITF-USB DSD based DACs need a vendor cmd to switch
1552  * between PCM and native DSD mode
1553  */
1554 static bool is_itf_usb_dsd_dac(unsigned int id)
1555 {
1556 	switch (id) {
1557 	case USB_ID(0x154e, 0x1002): /* Denon DCD-1500RE */
1558 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
1559 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
1560 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
1561 	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
1562 	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
1563 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
1564 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
1565 		return true;
1566 	}
1567 	return false;
1568 }
1569 
1570 int snd_usb_select_mode_quirk(struct snd_usb_audio *chip,
1571 			      const struct audioformat *fmt)
1572 {
1573 	struct usb_device *dev = chip->dev;
1574 	int err;
1575 
1576 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1577 		/* First switch to alt set 0, otherwise the mode switch cmd
1578 		 * will not be accepted by the DAC
1579 		 */
1580 		err = usb_set_interface(dev, fmt->iface, 0);
1581 		if (err < 0)
1582 			return err;
1583 
1584 		msleep(20); /* Delay needed after setting the interface */
1585 
1586 		/* Vendor mode switch cmd is required. */
1587 		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
1588 			/* DSD mode (DSD_U32) requested */
1589 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1590 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1591 					      1, 1, NULL, 0);
1592 			if (err < 0)
1593 				return err;
1594 
1595 		} else {
1596 			/* PCM or DOP mode (S32) requested */
1597 			/* PCM mode (S16) requested */
1598 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1599 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1600 					      0, 1, NULL, 0);
1601 			if (err < 0)
1602 				return err;
1603 
1604 		}
1605 		msleep(20);
1606 	}
1607 	return 0;
1608 }
1609 
1610 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1611 {
1612 	/*
1613 	 * "Playback Design" products send bogus feedback data at the start
1614 	 * of the stream. Ignore them.
1615 	 */
1616 	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
1617 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1618 		ep->skip_packets = 4;
1619 
1620 	/*
1621 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1622 	 * world latency varies by approx. +/- 50 frames (at 96kHz) each time
1623 	 * the stream is (re)started. When skipping packets 16 at endpoint
1624 	 * start up, the real world latency is stable within +/- 1 frame (also
1625 	 * across power cycles).
1626 	 */
1627 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1628 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1629 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1630 		ep->skip_packets = 16;
1631 
1632 	/* Work around devices that report unreasonable feedback data */
1633 	if ((ep->chip->usb_id == USB_ID(0x0644, 0x8038) ||  /* TEAC UD-H01 */
1634 	     ep->chip->usb_id == USB_ID(0x1852, 0x5034)) && /* T+A Dac8 */
1635 	    ep->syncmaxsize == 4)
1636 		ep->tenor_fb_quirk = 1;
1637 }
1638 
1639 void snd_usb_set_interface_quirk(struct snd_usb_audio *chip)
1640 {
1641 	if (!chip)
1642 		return;
1643 	/*
1644 	 * "Playback Design" products need a 50ms delay after setting the
1645 	 * USB interface.
1646 	 */
1647 	switch (USB_ID_VENDOR(chip->usb_id)) {
1648 	case 0x23ba: /* Playback Design */
1649 	case 0x0644: /* TEAC Corp. */
1650 		msleep(50);
1651 		break;
1652 	}
1653 }
1654 
1655 /* quirk applied after snd_usb_ctl_msg(); not applied during boot quirks */
1656 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1657 			   __u8 request, __u8 requesttype, __u16 value,
1658 			   __u16 index, void *data, __u16 size)
1659 {
1660 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1661 
1662 	if (!chip)
1663 		return;
1664 	/*
1665 	 * "Playback Design" products need a 20ms delay after each
1666 	 * class compliant request
1667 	 */
1668 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1669 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1670 		msleep(20);
1671 
1672 	/*
1673 	 * "TEAC Corp." products need a 20ms delay after each
1674 	 * class compliant request
1675 	 */
1676 	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
1677 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1678 		msleep(20);
1679 
1680 	/* ITF-USB DSD based DACs functionality need a delay
1681 	 * after each class compliant request
1682 	 */
1683 	if (is_itf_usb_dsd_dac(chip->usb_id)
1684 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1685 		msleep(20);
1686 
1687 	/*
1688 	 * Plantronics headsets (C320, C320-M, etc) need a delay to avoid
1689 	 * random microhpone failures.
1690 	 */
1691 	if (USB_ID_VENDOR(chip->usb_id) == 0x047f &&
1692 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1693 		msleep(20);
1694 
1695 	/* Zoom R16/24, many Logitech(at least H650e/H570e/BCC950),
1696 	 * Jabra 550a, Kingston HyperX needs a tiny delay here,
1697 	 * otherwise requests like get/set frequency return
1698 	 * as failed despite actually succeeding.
1699 	 */
1700 	if ((chip->usb_id == USB_ID(0x1686, 0x00dd) ||
1701 	     USB_ID_VENDOR(chip->usb_id) == 0x046d  || /* Logitech */
1702 	     chip->usb_id == USB_ID(0x0b0e, 0x0349) ||
1703 	     chip->usb_id == USB_ID(0x0951, 0x16ad)) &&
1704 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1705 		usleep_range(1000, 2000);
1706 
1707 	/*
1708 	 * Samsung USBC Headset (AKG) need a tiny delay after each
1709 	 * class compliant request. (Model number: AAM625R or AAM627R)
1710 	 */
1711 	if (chip->usb_id == USB_ID(0x04e8, 0xa051) &&
1712 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1713 		usleep_range(5000, 6000);
1714 }
1715 
1716 /*
1717  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1718  * augment the PCM format bit-field for DSD types. The UAC standards
1719  * don't have a designated bit field to denote DSD-capable interfaces,
1720  * hence all hardware that is known to support this format has to be
1721  * listed here.
1722  */
1723 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1724 					struct audioformat *fp,
1725 					unsigned int sample_bytes)
1726 {
1727 	struct usb_interface *iface;
1728 
1729 	/* Playback Designs */
1730 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1731 	    USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
1732 		switch (fp->altsetting) {
1733 		case 1:
1734 			fp->dsd_dop = true;
1735 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1736 		case 2:
1737 			fp->dsd_bitrev = true;
1738 			return SNDRV_PCM_FMTBIT_DSD_U8;
1739 		case 3:
1740 			fp->dsd_bitrev = true;
1741 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1742 		}
1743 	}
1744 
1745 	/* XMOS based USB DACs */
1746 	switch (chip->usb_id) {
1747 	case USB_ID(0x1511, 0x0037): /* AURALiC VEGA */
1748 	case USB_ID(0x2522, 0x0012): /* LH Labs VI DAC Infinity */
1749 	case USB_ID(0x2772, 0x0230): /* Pro-Ject Pre Box S2 Digital */
1750 		if (fp->altsetting == 2)
1751 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1752 		break;
1753 
1754 	case USB_ID(0x0d8c, 0x0316): /* Hegel HD12 DSD */
1755 	case USB_ID(0x10cb, 0x0103): /* The Bit Opus #3; with fp->dsd_raw */
1756 	case USB_ID(0x16d0, 0x06b2): /* NuPrime DAC-10 */
1757 	case USB_ID(0x16d0, 0x09dd): /* Encore mDSD */
1758 	case USB_ID(0x16d0, 0x0733): /* Furutech ADL Stratos */
1759 	case USB_ID(0x16d0, 0x09db): /* NuPrime Audio DAC-9 */
1760 	case USB_ID(0x1db5, 0x0003): /* Bryston BDA3 */
1761 	case USB_ID(0x22e1, 0xca01): /* HDTA Serenade DSD */
1762 	case USB_ID(0x249c, 0x9326): /* M2Tech Young MkIII */
1763 	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
1764 	case USB_ID(0x2622, 0x0041): /* Audiolab M-DAC+ */
1765 	case USB_ID(0x27f7, 0x3002): /* W4S DAC-2v2SE */
1766 	case USB_ID(0x29a2, 0x0086): /* Mutec MC3+ USB */
1767 	case USB_ID(0x6b42, 0x0042): /* MSB Technology */
1768 		if (fp->altsetting == 3)
1769 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1770 		break;
1771 
1772 	/* Amanero Combo384 USB based DACs with native DSD support */
1773 	case USB_ID(0x16d0, 0x071a):  /* Amanero - Combo384 */
1774 	case USB_ID(0x2ab6, 0x0004):  /* T+A DAC8DSD-V2.0, MP1000E-V2.0, MP2000R-V2.0, MP2500R-V2.0, MP3100HV-V2.0 */
1775 	case USB_ID(0x2ab6, 0x0005):  /* T+A USB HD Audio 1 */
1776 	case USB_ID(0x2ab6, 0x0006):  /* T+A USB HD Audio 2 */
1777 		if (fp->altsetting == 2) {
1778 			switch (le16_to_cpu(chip->dev->descriptor.bcdDevice)) {
1779 			case 0x199:
1780 				return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1781 			case 0x19b:
1782 			case 0x203:
1783 				return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1784 			default:
1785 				break;
1786 			}
1787 		}
1788 		break;
1789 	case USB_ID(0x16d0, 0x0a23):
1790 		if (fp->altsetting == 2)
1791 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1792 		break;
1793 
1794 	default:
1795 		break;
1796 	}
1797 
1798 	/* ITF-USB DSD based DACs */
1799 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1800 		iface = usb_ifnum_to_if(chip->dev, fp->iface);
1801 
1802 		/* Altsetting 2 support native DSD if the num of altsets is
1803 		 * three (0-2),
1804 		 * Altsetting 3 support native DSD if the num of altsets is
1805 		 * four (0-3).
1806 		 */
1807 		if (fp->altsetting == iface->num_altsetting - 1)
1808 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1809 	}
1810 
1811 	/* Mostly generic method to detect many DSD-capable implementations -
1812 	 * from XMOS/Thesycon
1813 	 */
1814 	switch (USB_ID_VENDOR(chip->usb_id)) {
1815 	case 0x152a:  /* Thesycon devices */
1816 	case 0x20b1:  /* XMOS based devices */
1817 	case 0x22d9:  /* Oppo */
1818 	case 0x23ba:  /* Playback Designs */
1819 	case 0x25ce:  /* Mytek devices */
1820 	case 0x278b:  /* Rotel? */
1821 	case 0x292b:  /* Gustard/Ess based devices */
1822 	case 0x2972:  /* FiiO devices */
1823 	case 0x2ab6:  /* T+A devices */
1824 	case 0x3353:  /* Khadas devices */
1825 	case 0x3842:  /* EVGA */
1826 	case 0xc502:  /* HiBy devices */
1827 		if (fp->dsd_raw)
1828 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1829 		break;
1830 	default:
1831 		break;
1832 
1833 	}
1834 
1835 	return 0;
1836 }
1837 
1838 void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
1839 					  struct audioformat *fp,
1840 					  int stream)
1841 {
1842 	switch (chip->usb_id) {
1843 	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1844 		/* Optoplay sets the sample rate attribute although
1845 		 * it seems not supporting it in fact.
1846 		 */
1847 		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
1848 		break;
1849 	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
1850 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1851 		/* doesn't set the sample rate attribute, but supports it */
1852 		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
1853 		break;
1854 	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
1855 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1856 	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
1857 	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
1858 					an older model 77d:223) */
1859 	/*
1860 	 * plantronics headset and Griffin iMic have set adaptive-in
1861 	 * although it's really not...
1862 	 */
1863 		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
1864 		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1865 			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
1866 		else
1867 			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
1868 		break;
1869 	case USB_ID(0x07fd, 0x0004):  /* MOTU MicroBook IIc */
1870 		/*
1871 		 * MaxPacketsOnly attribute is erroneously set in endpoint
1872 		 * descriptors. As a result this card produces noise with
1873 		 * all sample rates other than 96 kHz.
1874 		 */
1875 		fp->attributes &= ~UAC_EP_CS_ATTR_FILL_MAX;
1876 		break;
1877 	}
1878 }
1879 
1880 /*
1881  * registration quirk:
1882  * the registration is skipped if a device matches with the given ID,
1883  * unless the interface reaches to the defined one.  This is for delaying
1884  * the registration until the last known interface, so that the card and
1885  * devices appear at the same time.
1886  */
1887 
1888 struct registration_quirk {
1889 	unsigned int usb_id;	/* composed via USB_ID() */
1890 	unsigned int interface;	/* the interface to trigger register */
1891 };
1892 
1893 #define REG_QUIRK_ENTRY(vendor, product, iface) \
1894 	{ .usb_id = USB_ID(vendor, product), .interface = (iface) }
1895 
1896 static const struct registration_quirk registration_quirks[] = {
1897 	REG_QUIRK_ENTRY(0x0951, 0x16d8, 2),	/* Kingston HyperX AMP */
1898 	REG_QUIRK_ENTRY(0x0951, 0x16ed, 2),	/* Kingston HyperX Cloud Alpha S */
1899 	REG_QUIRK_ENTRY(0x0951, 0x16ea, 2),	/* Kingston HyperX Cloud Flight S */
1900 	{ 0 }					/* terminator */
1901 };
1902 
1903 /* return true if skipping registration */
1904 bool snd_usb_registration_quirk(struct snd_usb_audio *chip, int iface)
1905 {
1906 	const struct registration_quirk *q;
1907 
1908 	for (q = registration_quirks; q->usb_id; q++)
1909 		if (chip->usb_id == q->usb_id)
1910 			return iface != q->interface;
1911 
1912 	/* Register as normal */
1913 	return false;
1914 }
1915