xref: /openbmc/linux/sound/usb/quirks.c (revision c88773dc)
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 			usb_driver_claim_interface(driver, iface, (void *)-1L);
60 	}
61 
62 	return 0;
63 }
64 
65 static int ignore_interface_quirk(struct snd_usb_audio *chip,
66 				  struct usb_interface *iface,
67 				  struct usb_driver *driver,
68 				  const struct snd_usb_audio_quirk *quirk)
69 {
70 	return 0;
71 }
72 
73 
74 /*
75  * Allow alignment on audio sub-slot (channel samples) rather than
76  * on audio slots (audio frames)
77  */
78 static int create_align_transfer_quirk(struct snd_usb_audio *chip,
79 				       struct usb_interface *iface,
80 				       struct usb_driver *driver,
81 				       const struct snd_usb_audio_quirk *quirk)
82 {
83 	chip->txfr_quirk = 1;
84 	return 1;	/* Continue with creating streams and mixer */
85 }
86 
87 static int create_any_midi_quirk(struct snd_usb_audio *chip,
88 				 struct usb_interface *intf,
89 				 struct usb_driver *driver,
90 				 const struct snd_usb_audio_quirk *quirk)
91 {
92 	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
93 }
94 
95 /*
96  * create a stream for an interface with proper descriptors
97  */
98 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
99 				       struct usb_interface *iface,
100 				       struct usb_driver *driver,
101 				       const struct snd_usb_audio_quirk *quirk)
102 {
103 	struct usb_host_interface *alts;
104 	struct usb_interface_descriptor *altsd;
105 	int err;
106 
107 	if (chip->usb_id == USB_ID(0x1686, 0x00dd)) /* Zoom R16/24 */
108 		chip->tx_length_quirk = 1;
109 
110 	alts = &iface->altsetting[0];
111 	altsd = get_iface_desc(alts);
112 	err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
113 	if (err < 0) {
114 		usb_audio_err(chip, "cannot setup if %d: error %d\n",
115 			   altsd->bInterfaceNumber, err);
116 		return err;
117 	}
118 	/* reset the current interface */
119 	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
120 	return 0;
121 }
122 
123 /*
124  * create a stream for an endpoint/altsetting without proper descriptors
125  */
126 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
127 				     struct usb_interface *iface,
128 				     struct usb_driver *driver,
129 				     const struct snd_usb_audio_quirk *quirk)
130 {
131 	struct audioformat *fp;
132 	struct usb_host_interface *alts;
133 	struct usb_interface_descriptor *altsd;
134 	int stream, err;
135 	unsigned *rate_table = NULL;
136 
137 	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
138 	if (!fp)
139 		return -ENOMEM;
140 
141 	INIT_LIST_HEAD(&fp->list);
142 	if (fp->nr_rates > MAX_NR_RATES) {
143 		kfree(fp);
144 		return -EINVAL;
145 	}
146 	if (fp->nr_rates > 0) {
147 		rate_table = kmemdup(fp->rate_table,
148 				     sizeof(int) * fp->nr_rates, GFP_KERNEL);
149 		if (!rate_table) {
150 			kfree(fp);
151 			return -ENOMEM;
152 		}
153 		fp->rate_table = rate_table;
154 	}
155 
156 	stream = (fp->endpoint & USB_DIR_IN)
157 		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
158 	err = snd_usb_add_audio_stream(chip, stream, fp);
159 	if (err < 0)
160 		goto error;
161 	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
162 	    fp->altset_idx >= iface->num_altsetting) {
163 		err = -EINVAL;
164 		goto error;
165 	}
166 	alts = &iface->altsetting[fp->altset_idx];
167 	altsd = get_iface_desc(alts);
168 	if (altsd->bNumEndpoints < 1) {
169 		err = -EINVAL;
170 		goto error;
171 	}
172 
173 	fp->protocol = altsd->bInterfaceProtocol;
174 
175 	if (fp->datainterval == 0)
176 		fp->datainterval = snd_usb_parse_datainterval(chip, alts);
177 	if (fp->maxpacksize == 0)
178 		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
179 	usb_set_interface(chip->dev, fp->iface, 0);
180 	snd_usb_init_pitch(chip, fp->iface, alts, fp);
181 	snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
182 	return 0;
183 
184  error:
185 	list_del(&fp->list); /* unlink for avoiding double-free */
186 	kfree(fp);
187 	kfree(rate_table);
188 	return err;
189 }
190 
191 static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
192 				 struct usb_interface *iface,
193 				 struct usb_driver *driver)
194 {
195 	struct usb_host_interface *alts;
196 	struct usb_interface_descriptor *altsd;
197 	struct usb_endpoint_descriptor *epd;
198 	struct uac1_as_header_descriptor *ashd;
199 	struct uac_format_type_i_discrete_descriptor *fmtd;
200 
201 	/*
202 	 * Most Roland/Yamaha audio streaming interfaces have more or less
203 	 * standard descriptors, but older devices might lack descriptors, and
204 	 * future ones might change, so ensure that we fail silently if the
205 	 * interface doesn't look exactly right.
206 	 */
207 
208 	/* must have a non-zero altsetting for streaming */
209 	if (iface->num_altsetting < 2)
210 		return -ENODEV;
211 	alts = &iface->altsetting[1];
212 	altsd = get_iface_desc(alts);
213 
214 	/* must have an isochronous endpoint for streaming */
215 	if (altsd->bNumEndpoints < 1)
216 		return -ENODEV;
217 	epd = get_endpoint(alts, 0);
218 	if (!usb_endpoint_xfer_isoc(epd))
219 		return -ENODEV;
220 
221 	/* must have format descriptors */
222 	ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
223 				       UAC_AS_GENERAL);
224 	fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
225 				       UAC_FORMAT_TYPE);
226 	if (!ashd || ashd->bLength < 7 ||
227 	    !fmtd || fmtd->bLength < 8)
228 		return -ENODEV;
229 
230 	return create_standard_audio_quirk(chip, iface, driver, NULL);
231 }
232 
233 static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
234 				    struct usb_interface *iface,
235 				    struct usb_driver *driver,
236 				    struct usb_host_interface *alts)
237 {
238 	static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
239 		.type = QUIRK_MIDI_YAMAHA
240 	};
241 	struct usb_midi_in_jack_descriptor *injd;
242 	struct usb_midi_out_jack_descriptor *outjd;
243 
244 	/* must have some valid jack descriptors */
245 	injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
246 				       NULL, USB_MS_MIDI_IN_JACK);
247 	outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
248 					NULL, USB_MS_MIDI_OUT_JACK);
249 	if (!injd && !outjd)
250 		return -ENODEV;
251 	if ((injd && !snd_usb_validate_midi_desc(injd)) ||
252 	    (outjd && !snd_usb_validate_midi_desc(outjd)))
253 		return -ENODEV;
254 	if (injd && (injd->bLength < 5 ||
255 		     (injd->bJackType != USB_MS_EMBEDDED &&
256 		      injd->bJackType != USB_MS_EXTERNAL)))
257 		return -ENODEV;
258 	if (outjd && (outjd->bLength < 6 ||
259 		      (outjd->bJackType != USB_MS_EMBEDDED &&
260 		       outjd->bJackType != USB_MS_EXTERNAL)))
261 		return -ENODEV;
262 	return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
263 }
264 
265 static int create_roland_midi_quirk(struct snd_usb_audio *chip,
266 				    struct usb_interface *iface,
267 				    struct usb_driver *driver,
268 				    struct usb_host_interface *alts)
269 {
270 	static const struct snd_usb_audio_quirk roland_midi_quirk = {
271 		.type = QUIRK_MIDI_ROLAND
272 	};
273 	u8 *roland_desc = NULL;
274 
275 	/* might have a vendor-specific descriptor <06 24 F1 02 ...> */
276 	for (;;) {
277 		roland_desc = snd_usb_find_csint_desc(alts->extra,
278 						      alts->extralen,
279 						      roland_desc, 0xf1);
280 		if (!roland_desc)
281 			return -ENODEV;
282 		if (roland_desc[0] < 6 || roland_desc[3] != 2)
283 			continue;
284 		return create_any_midi_quirk(chip, iface, driver,
285 					     &roland_midi_quirk);
286 	}
287 }
288 
289 static int create_std_midi_quirk(struct snd_usb_audio *chip,
290 				 struct usb_interface *iface,
291 				 struct usb_driver *driver,
292 				 struct usb_host_interface *alts)
293 {
294 	struct usb_ms_header_descriptor *mshd;
295 	struct usb_ms_endpoint_descriptor *msepd;
296 
297 	/* must have the MIDIStreaming interface header descriptor*/
298 	mshd = (struct usb_ms_header_descriptor *)alts->extra;
299 	if (alts->extralen < 7 ||
300 	    mshd->bLength < 7 ||
301 	    mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
302 	    mshd->bDescriptorSubtype != USB_MS_HEADER)
303 		return -ENODEV;
304 	/* must have the MIDIStreaming endpoint descriptor*/
305 	msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
306 	if (alts->endpoint[0].extralen < 4 ||
307 	    msepd->bLength < 4 ||
308 	    msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
309 	    msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
310 	    msepd->bNumEmbMIDIJack < 1 ||
311 	    msepd->bNumEmbMIDIJack > 16)
312 		return -ENODEV;
313 
314 	return create_any_midi_quirk(chip, iface, driver, NULL);
315 }
316 
317 static int create_auto_midi_quirk(struct snd_usb_audio *chip,
318 				  struct usb_interface *iface,
319 				  struct usb_driver *driver)
320 {
321 	struct usb_host_interface *alts;
322 	struct usb_interface_descriptor *altsd;
323 	struct usb_endpoint_descriptor *epd;
324 	int err;
325 
326 	alts = &iface->altsetting[0];
327 	altsd = get_iface_desc(alts);
328 
329 	/* must have at least one bulk/interrupt endpoint for streaming */
330 	if (altsd->bNumEndpoints < 1)
331 		return -ENODEV;
332 	epd = get_endpoint(alts, 0);
333 	if (!usb_endpoint_xfer_bulk(epd) &&
334 	    !usb_endpoint_xfer_int(epd))
335 		return -ENODEV;
336 
337 	switch (USB_ID_VENDOR(chip->usb_id)) {
338 	case 0x0499: /* Yamaha */
339 		err = create_yamaha_midi_quirk(chip, iface, driver, alts);
340 		if (err != -ENODEV)
341 			return err;
342 		break;
343 	case 0x0582: /* Roland */
344 		err = create_roland_midi_quirk(chip, iface, driver, alts);
345 		if (err != -ENODEV)
346 			return err;
347 		break;
348 	}
349 
350 	return create_std_midi_quirk(chip, iface, driver, alts);
351 }
352 
353 static int create_autodetect_quirk(struct snd_usb_audio *chip,
354 				   struct usb_interface *iface,
355 				   struct usb_driver *driver)
356 {
357 	int err;
358 
359 	err = create_auto_pcm_quirk(chip, iface, driver);
360 	if (err == -ENODEV)
361 		err = create_auto_midi_quirk(chip, iface, driver);
362 	return err;
363 }
364 
365 static int create_autodetect_quirks(struct snd_usb_audio *chip,
366 				    struct usb_interface *iface,
367 				    struct usb_driver *driver,
368 				    const struct snd_usb_audio_quirk *quirk)
369 {
370 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
371 	int ifcount, ifnum, err;
372 
373 	err = create_autodetect_quirk(chip, iface, driver);
374 	if (err < 0)
375 		return err;
376 
377 	/*
378 	 * ALSA PCM playback/capture devices cannot be registered in two steps,
379 	 * so we have to claim the other corresponding interface here.
380 	 */
381 	ifcount = chip->dev->actconfig->desc.bNumInterfaces;
382 	for (ifnum = 0; ifnum < ifcount; ifnum++) {
383 		if (ifnum == probed_ifnum || quirk->ifnum >= 0)
384 			continue;
385 		iface = usb_ifnum_to_if(chip->dev, ifnum);
386 		if (!iface ||
387 		    usb_interface_claimed(iface) ||
388 		    get_iface_desc(iface->altsetting)->bInterfaceClass !=
389 							USB_CLASS_VENDOR_SPEC)
390 			continue;
391 
392 		err = create_autodetect_quirk(chip, iface, driver);
393 		if (err >= 0)
394 			usb_driver_claim_interface(driver, iface, (void *)-1L);
395 	}
396 
397 	return 0;
398 }
399 
400 /*
401  * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
402  * The only way to detect the sample rate is by looking at wMaxPacketSize.
403  */
404 static int create_uaxx_quirk(struct snd_usb_audio *chip,
405 			     struct usb_interface *iface,
406 			     struct usb_driver *driver,
407 			     const struct snd_usb_audio_quirk *quirk)
408 {
409 	static const struct audioformat ua_format = {
410 		.formats = SNDRV_PCM_FMTBIT_S24_3LE,
411 		.channels = 2,
412 		.fmt_type = UAC_FORMAT_TYPE_I,
413 		.altsetting = 1,
414 		.altset_idx = 1,
415 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
416 	};
417 	struct usb_host_interface *alts;
418 	struct usb_interface_descriptor *altsd;
419 	struct audioformat *fp;
420 	int stream, err;
421 
422 	/* both PCM and MIDI interfaces have 2 or more altsettings */
423 	if (iface->num_altsetting < 2)
424 		return -ENXIO;
425 	alts = &iface->altsetting[1];
426 	altsd = get_iface_desc(alts);
427 
428 	if (altsd->bNumEndpoints == 2) {
429 		static const struct snd_usb_midi_endpoint_info ua700_ep = {
430 			.out_cables = 0x0003,
431 			.in_cables  = 0x0003
432 		};
433 		static const struct snd_usb_audio_quirk ua700_quirk = {
434 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
435 			.data = &ua700_ep
436 		};
437 		static const struct snd_usb_midi_endpoint_info uaxx_ep = {
438 			.out_cables = 0x0001,
439 			.in_cables  = 0x0001
440 		};
441 		static const struct snd_usb_audio_quirk uaxx_quirk = {
442 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
443 			.data = &uaxx_ep
444 		};
445 		const struct snd_usb_audio_quirk *quirk =
446 			chip->usb_id == USB_ID(0x0582, 0x002b)
447 			? &ua700_quirk : &uaxx_quirk;
448 		return __snd_usbmidi_create(chip->card, iface,
449 					  &chip->midi_list, quirk,
450 					  chip->usb_id);
451 	}
452 
453 	if (altsd->bNumEndpoints != 1)
454 		return -ENXIO;
455 
456 	fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
457 	if (!fp)
458 		return -ENOMEM;
459 
460 	fp->iface = altsd->bInterfaceNumber;
461 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
462 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
463 	fp->datainterval = 0;
464 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
465 	INIT_LIST_HEAD(&fp->list);
466 
467 	switch (fp->maxpacksize) {
468 	case 0x120:
469 		fp->rate_max = fp->rate_min = 44100;
470 		break;
471 	case 0x138:
472 	case 0x140:
473 		fp->rate_max = fp->rate_min = 48000;
474 		break;
475 	case 0x258:
476 	case 0x260:
477 		fp->rate_max = fp->rate_min = 96000;
478 		break;
479 	default:
480 		usb_audio_err(chip, "unknown sample rate\n");
481 		kfree(fp);
482 		return -ENXIO;
483 	}
484 
485 	stream = (fp->endpoint & USB_DIR_IN)
486 		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
487 	err = snd_usb_add_audio_stream(chip, stream, fp);
488 	if (err < 0) {
489 		list_del(&fp->list); /* unlink for avoiding double-free */
490 		kfree(fp);
491 		return err;
492 	}
493 	usb_set_interface(chip->dev, fp->iface, 0);
494 	return 0;
495 }
496 
497 /*
498  * Create a standard mixer for the specified interface.
499  */
500 static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
501 				       struct usb_interface *iface,
502 				       struct usb_driver *driver,
503 				       const struct snd_usb_audio_quirk *quirk)
504 {
505 	if (quirk->ifnum < 0)
506 		return 0;
507 
508 	return snd_usb_create_mixer(chip, quirk->ifnum, 0);
509 }
510 
511 
512 static int setup_fmt_after_resume_quirk(struct snd_usb_audio *chip,
513 				       struct usb_interface *iface,
514 				       struct usb_driver *driver,
515 				       const struct snd_usb_audio_quirk *quirk)
516 {
517 	chip->setup_fmt_after_resume_quirk = 1;
518 	return 1;	/* Continue with creating streams and mixer */
519 }
520 
521 static int setup_disable_autosuspend(struct snd_usb_audio *chip,
522 				       struct usb_interface *iface,
523 				       struct usb_driver *driver,
524 				       const struct snd_usb_audio_quirk *quirk)
525 {
526 	driver->supports_autosuspend = 0;
527 	return 1;	/* Continue with creating streams and mixer */
528 }
529 
530 /*
531  * audio-interface quirks
532  *
533  * returns zero if no standard audio/MIDI parsing is needed.
534  * returns a positive value if standard audio/midi interfaces are parsed
535  * after this.
536  * returns a negative value at error.
537  */
538 int snd_usb_create_quirk(struct snd_usb_audio *chip,
539 			 struct usb_interface *iface,
540 			 struct usb_driver *driver,
541 			 const struct snd_usb_audio_quirk *quirk)
542 {
543 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
544 				    struct usb_interface *,
545 				    struct usb_driver *,
546 				    const struct snd_usb_audio_quirk *);
547 	static const quirk_func_t quirk_funcs[] = {
548 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
549 		[QUIRK_COMPOSITE] = create_composite_quirk,
550 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
551 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
552 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
553 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
554 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
555 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
556 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
557 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
558 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
559 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
560 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
561 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
562 		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
563 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
564 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
565 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
566 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
567 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
568 		[QUIRK_SETUP_FMT_AFTER_RESUME] = setup_fmt_after_resume_quirk,
569 		[QUIRK_SETUP_DISABLE_AUTOSUSPEND] = setup_disable_autosuspend,
570 	};
571 
572 	if (quirk->type < QUIRK_TYPE_COUNT) {
573 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
574 	} else {
575 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
576 		return -ENXIO;
577 	}
578 }
579 
580 /*
581  * boot quirks
582  */
583 
584 #define EXTIGY_FIRMWARE_SIZE_OLD 794
585 #define EXTIGY_FIRMWARE_SIZE_NEW 483
586 
587 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
588 {
589 	struct usb_host_config *config = dev->actconfig;
590 	int err;
591 
592 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
593 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
594 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
595 		/* Send message to force it to reconnect with full interface. */
596 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
597 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
598 		if (err < 0)
599 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
600 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
601 				&dev->descriptor, sizeof(dev->descriptor));
602 		config = dev->actconfig;
603 		if (err < 0)
604 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
605 		err = usb_reset_configuration(dev);
606 		if (err < 0)
607 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
608 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
609 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
610 		return -ENODEV; /* quit this anyway */
611 	}
612 	return 0;
613 }
614 
615 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
616 {
617 	u8 buf = 1;
618 
619 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
620 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
621 			0, 0, &buf, 1);
622 	if (buf == 0) {
623 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
624 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
625 				1, 2000, NULL, 0);
626 		return -ENODEV;
627 	}
628 	return 0;
629 }
630 
631 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
632 {
633 	int err;
634 
635 	if (dev->actconfig->desc.bConfigurationValue == 1) {
636 		dev_info(&dev->dev,
637 			   "Fast Track Pro switching to config #2\n");
638 		/* This function has to be available by the usb core module.
639 		 * if it is not avialable the boot quirk has to be left out
640 		 * and the configuration has to be set by udev or hotplug
641 		 * rules
642 		 */
643 		err = usb_driver_set_configuration(dev, 2);
644 		if (err < 0)
645 			dev_dbg(&dev->dev,
646 				"error usb_driver_set_configuration: %d\n",
647 				err);
648 		/* Always return an error, so that we stop creating a device
649 		   that will just be destroyed and recreated with a new
650 		   configuration */
651 		return -ENODEV;
652 	} else
653 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
654 
655 	return 0;
656 }
657 
658 /*
659  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
660  * documented in the device's data sheet.
661  */
662 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
663 {
664 	u8 buf[4];
665 	buf[0] = 0x20;
666 	buf[1] = value & 0xff;
667 	buf[2] = (value >> 8) & 0xff;
668 	buf[3] = reg;
669 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
670 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
671 			       0, 0, &buf, 4);
672 }
673 
674 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
675 {
676 	/*
677 	 * Enable line-out driver mode, set headphone source to front
678 	 * channels, enable stereo mic.
679 	 */
680 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
681 }
682 
683 /*
684  * CM6206 registers from the CM6206 datasheet rev 2.1
685  */
686 #define CM6206_REG0_DMA_MASTER BIT(15)
687 #define CM6206_REG0_SPDIFO_RATE_48K (2 << 12)
688 #define CM6206_REG0_SPDIFO_RATE_96K (7 << 12)
689 /* Bit 4 thru 11 is the S/PDIF category code */
690 #define CM6206_REG0_SPDIFO_CAT_CODE_GENERAL (0 << 4)
691 #define CM6206_REG0_SPDIFO_EMPHASIS_CD BIT(3)
692 #define CM6206_REG0_SPDIFO_COPYRIGHT_NA BIT(2)
693 #define CM6206_REG0_SPDIFO_NON_AUDIO BIT(1)
694 #define CM6206_REG0_SPDIFO_PRO_FORMAT BIT(0)
695 
696 #define CM6206_REG1_TEST_SEL_CLK BIT(14)
697 #define CM6206_REG1_PLLBIN_EN BIT(13)
698 #define CM6206_REG1_SOFT_MUTE_EN BIT(12)
699 #define CM6206_REG1_GPIO4_OUT BIT(11)
700 #define CM6206_REG1_GPIO4_OE BIT(10)
701 #define CM6206_REG1_GPIO3_OUT BIT(9)
702 #define CM6206_REG1_GPIO3_OE BIT(8)
703 #define CM6206_REG1_GPIO2_OUT BIT(7)
704 #define CM6206_REG1_GPIO2_OE BIT(6)
705 #define CM6206_REG1_GPIO1_OUT BIT(5)
706 #define CM6206_REG1_GPIO1_OE BIT(4)
707 #define CM6206_REG1_SPDIFO_INVALID BIT(3)
708 #define CM6206_REG1_SPDIF_LOOP_EN BIT(2)
709 #define CM6206_REG1_SPDIFO_DIS BIT(1)
710 #define CM6206_REG1_SPDIFI_MIX BIT(0)
711 
712 #define CM6206_REG2_DRIVER_ON BIT(15)
713 #define CM6206_REG2_HEADP_SEL_SIDE_CHANNELS (0 << 13)
714 #define CM6206_REG2_HEADP_SEL_SURROUND_CHANNELS (1 << 13)
715 #define CM6206_REG2_HEADP_SEL_CENTER_SUBW (2 << 13)
716 #define CM6206_REG2_HEADP_SEL_FRONT_CHANNELS (3 << 13)
717 #define CM6206_REG2_MUTE_HEADPHONE_RIGHT BIT(12)
718 #define CM6206_REG2_MUTE_HEADPHONE_LEFT BIT(11)
719 #define CM6206_REG2_MUTE_REAR_SURROUND_RIGHT BIT(10)
720 #define CM6206_REG2_MUTE_REAR_SURROUND_LEFT BIT(9)
721 #define CM6206_REG2_MUTE_SIDE_SURROUND_RIGHT BIT(8)
722 #define CM6206_REG2_MUTE_SIDE_SURROUND_LEFT BIT(7)
723 #define CM6206_REG2_MUTE_SUBWOOFER BIT(6)
724 #define CM6206_REG2_MUTE_CENTER BIT(5)
725 #define CM6206_REG2_MUTE_RIGHT_FRONT BIT(3)
726 #define CM6206_REG2_MUTE_LEFT_FRONT BIT(3)
727 #define CM6206_REG2_EN_BTL BIT(2)
728 #define CM6206_REG2_MCUCLKSEL_1_5_MHZ (0)
729 #define CM6206_REG2_MCUCLKSEL_3_MHZ (1)
730 #define CM6206_REG2_MCUCLKSEL_6_MHZ (2)
731 #define CM6206_REG2_MCUCLKSEL_12_MHZ (3)
732 
733 /* Bit 11..13 sets the sensitivity to FLY tuner volume control VP/VD signal */
734 #define CM6206_REG3_FLYSPEED_DEFAULT (2 << 11)
735 #define CM6206_REG3_VRAP25EN BIT(10)
736 #define CM6206_REG3_MSEL1 BIT(9)
737 #define CM6206_REG3_SPDIFI_RATE_44_1K BIT(0 << 7)
738 #define CM6206_REG3_SPDIFI_RATE_48K BIT(2 << 7)
739 #define CM6206_REG3_SPDIFI_RATE_32K BIT(3 << 7)
740 #define CM6206_REG3_PINSEL BIT(6)
741 #define CM6206_REG3_FOE BIT(5)
742 #define CM6206_REG3_ROE BIT(4)
743 #define CM6206_REG3_CBOE BIT(3)
744 #define CM6206_REG3_LOSE BIT(2)
745 #define CM6206_REG3_HPOE BIT(1)
746 #define CM6206_REG3_SPDIFI_CANREC BIT(0)
747 
748 #define CM6206_REG5_DA_RSTN BIT(13)
749 #define CM6206_REG5_AD_RSTN BIT(12)
750 #define CM6206_REG5_SPDIFO_AD2SPDO BIT(12)
751 #define CM6206_REG5_SPDIFO_SEL_FRONT (0 << 9)
752 #define CM6206_REG5_SPDIFO_SEL_SIDE_SUR (1 << 9)
753 #define CM6206_REG5_SPDIFO_SEL_CEN_LFE (2 << 9)
754 #define CM6206_REG5_SPDIFO_SEL_REAR_SUR (3 << 9)
755 #define CM6206_REG5_CODECM BIT(8)
756 #define CM6206_REG5_EN_HPF BIT(7)
757 #define CM6206_REG5_T_SEL_DSDA4 BIT(6)
758 #define CM6206_REG5_T_SEL_DSDA3 BIT(5)
759 #define CM6206_REG5_T_SEL_DSDA2 BIT(4)
760 #define CM6206_REG5_T_SEL_DSDA1 BIT(3)
761 #define CM6206_REG5_T_SEL_DSDAD_NORMAL 0
762 #define CM6206_REG5_T_SEL_DSDAD_FRONT 4
763 #define CM6206_REG5_T_SEL_DSDAD_S_SURROUND 5
764 #define CM6206_REG5_T_SEL_DSDAD_CEN_LFE 6
765 #define CM6206_REG5_T_SEL_DSDAD_R_SURROUND 7
766 
767 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
768 {
769 	int err  = 0, reg;
770 	int val[] = {
771 		/*
772 		 * Values here are chosen based on sniffing USB traffic
773 		 * under Windows.
774 		 *
775 		 * REG0: DAC is master, sample rate 48kHz, no copyright
776 		 */
777 		CM6206_REG0_SPDIFO_RATE_48K |
778 		CM6206_REG0_SPDIFO_COPYRIGHT_NA,
779 		/*
780 		 * REG1: PLL binary search enable, soft mute enable.
781 		 */
782 		CM6206_REG1_PLLBIN_EN |
783 		CM6206_REG1_SOFT_MUTE_EN,
784 		/*
785 		 * REG2: enable output drivers,
786 		 * select front channels to the headphone output,
787 		 * then mute the headphone channels, run the MCU
788 		 * at 1.5 MHz.
789 		 */
790 		CM6206_REG2_DRIVER_ON |
791 		CM6206_REG2_HEADP_SEL_FRONT_CHANNELS |
792 		CM6206_REG2_MUTE_HEADPHONE_RIGHT |
793 		CM6206_REG2_MUTE_HEADPHONE_LEFT,
794 		/*
795 		 * REG3: default flyspeed, set 2.5V mic bias
796 		 * enable all line out ports and enable SPDIF
797 		 */
798 		CM6206_REG3_FLYSPEED_DEFAULT |
799 		CM6206_REG3_VRAP25EN |
800 		CM6206_REG3_FOE |
801 		CM6206_REG3_ROE |
802 		CM6206_REG3_CBOE |
803 		CM6206_REG3_LOSE |
804 		CM6206_REG3_HPOE |
805 		CM6206_REG3_SPDIFI_CANREC,
806 		/* REG4 is just a bunch of GPIO lines */
807 		0x0000,
808 		/* REG5: de-assert AD/DA reset signals */
809 		CM6206_REG5_DA_RSTN |
810 		CM6206_REG5_AD_RSTN };
811 
812 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
813 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
814 		if (err < 0)
815 			return err;
816 	}
817 
818 	return err;
819 }
820 
821 /* quirk for Plantronics GameCom 780 with CM6302 chip */
822 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
823 {
824 	/* set the initial volume and don't change; other values are either
825 	 * too loud or silent due to firmware bug (bko#65251)
826 	 */
827 	u8 buf[2] = { 0x74, 0xe3 };
828 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
829 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
830 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
831 }
832 
833 /*
834  * Novation Twitch DJ controller
835  * Focusrite Novation Saffire 6 USB audio card
836  */
837 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
838 {
839 	/* preemptively set up the device because otherwise the
840 	 * raw MIDI endpoints are not active */
841 	usb_set_interface(dev, 0, 1);
842 	return 0;
843 }
844 
845 /*
846  * This call will put the synth in "USB send" mode, i.e it will send MIDI
847  * messages through USB (this is disabled at startup). The synth will
848  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
849  * sign on its LCD. Values here are chosen based on sniffing USB traffic
850  * under Windows.
851  */
852 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
853 {
854 	int err, actual_length;
855 	/* "midi send" enable */
856 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
857 	void *buf;
858 
859 	if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x05)))
860 		return -EINVAL;
861 	buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
862 	if (!buf)
863 		return -ENOMEM;
864 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
865 			ARRAY_SIZE(seq), &actual_length, 1000);
866 	kfree(buf);
867 	if (err < 0)
868 		return err;
869 
870 	return 0;
871 }
872 
873 /*
874  * Some sound cards from Native Instruments are in fact compliant to the USB
875  * audio standard of version 2 and other approved USB standards, even though
876  * they come up as vendor-specific device when first connected.
877  *
878  * However, they can be told to come up with a new set of descriptors
879  * upon their next enumeration, and the interfaces announced by the new
880  * descriptors will then be handled by the kernel's class drivers. As the
881  * product ID will also change, no further checks are required.
882  */
883 
884 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
885 {
886 	int ret;
887 
888 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
889 		return -EINVAL;
890 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
891 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
892 				  1, 0, NULL, 0, 1000);
893 
894 	if (ret < 0)
895 		return ret;
896 
897 	usb_reset_device(dev);
898 
899 	/* return -EAGAIN, so the creation of an audio interface for this
900 	 * temporary device is aborted. The device will reconnect with a
901 	 * new product ID */
902 	return -EAGAIN;
903 }
904 
905 static void mbox2_setup_48_24_magic(struct usb_device *dev)
906 {
907 	u8 srate[3];
908 	u8 temp[12];
909 
910 	/* Choose 48000Hz permanently */
911 	srate[0] = 0x80;
912 	srate[1] = 0xbb;
913 	srate[2] = 0x00;
914 
915 	/* Send the magic! */
916 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
917 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
918 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
919 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
920 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
921 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
922 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
923 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
924 	return;
925 }
926 
927 /* Digidesign Mbox 2 needs to load firmware onboard
928  * and driver must wait a few seconds for initialisation.
929  */
930 
931 #define MBOX2_FIRMWARE_SIZE    646
932 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
933 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
934 
935 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
936 {
937 	struct usb_host_config *config = dev->actconfig;
938 	int err;
939 	u8 bootresponse[0x12];
940 	int fwsize;
941 	int count;
942 
943 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
944 
945 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
946 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
947 		return -ENODEV;
948 	}
949 
950 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
951 
952 	count = 0;
953 	bootresponse[0] = MBOX2_BOOT_LOADING;
954 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
955 		msleep(500); /* 0.5 second delay */
956 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
957 			/* Control magic - load onboard firmware */
958 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
959 		if (bootresponse[0] == MBOX2_BOOT_READY)
960 			break;
961 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
962 		count++;
963 	}
964 
965 	if (bootresponse[0] != MBOX2_BOOT_READY) {
966 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
967 		return -ENODEV;
968 	}
969 
970 	dev_dbg(&dev->dev, "device initialised!\n");
971 
972 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
973 		&dev->descriptor, sizeof(dev->descriptor));
974 	config = dev->actconfig;
975 	if (err < 0)
976 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
977 
978 	err = usb_reset_configuration(dev);
979 	if (err < 0)
980 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
981 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
982 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
983 
984 	mbox2_setup_48_24_magic(dev);
985 
986 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
987 
988 	return 0; /* Successful boot */
989 }
990 
991 static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
992 {
993 	int err;
994 
995 	dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
996 
997 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
998 		return -EINVAL;
999 	/* If the Axe-Fx III has not fully booted, it will timeout when trying
1000 	 * to enable the audio streaming interface. A more generous timeout is
1001 	 * used here to detect when the Axe-Fx III has finished booting as the
1002 	 * set interface message will be acked once it has
1003 	 */
1004 	err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1005 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
1006 				1, 1, NULL, 0, 120000);
1007 	if (err < 0) {
1008 		dev_err(&dev->dev,
1009 			"failed waiting for Axe-Fx III to boot: %d\n", err);
1010 		return err;
1011 	}
1012 
1013 	dev_dbg(&dev->dev, "Axe-Fx III is now ready\n");
1014 
1015 	err = usb_set_interface(dev, 1, 0);
1016 	if (err < 0)
1017 		dev_dbg(&dev->dev,
1018 			"error stopping Axe-Fx III interface: %d\n", err);
1019 
1020 	return 0;
1021 }
1022 
1023 
1024 #define MICROBOOK_BUF_SIZE 128
1025 
1026 static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
1027 						int buf_size, int *length)
1028 {
1029 	int err, actual_length;
1030 
1031 	if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x01)))
1032 		return -EINVAL;
1033 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x01), buf, *length,
1034 				&actual_length, 1000);
1035 	if (err < 0)
1036 		return err;
1037 
1038 	print_hex_dump(KERN_DEBUG, "MicroBookII snd: ", DUMP_PREFIX_NONE, 16, 1,
1039 		       buf, actual_length, false);
1040 
1041 	memset(buf, 0, buf_size);
1042 
1043 	if (snd_usb_pipe_sanity_check(dev, usb_rcvintpipe(dev, 0x82)))
1044 		return -EINVAL;
1045 	err = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 0x82), buf, buf_size,
1046 				&actual_length, 1000);
1047 	if (err < 0)
1048 		return err;
1049 
1050 	print_hex_dump(KERN_DEBUG, "MicroBookII rcv: ", DUMP_PREFIX_NONE, 16, 1,
1051 		       buf, actual_length, false);
1052 
1053 	*length = actual_length;
1054 	return 0;
1055 }
1056 
1057 static int snd_usb_motu_microbookii_boot_quirk(struct usb_device *dev)
1058 {
1059 	int err, actual_length, poll_attempts = 0;
1060 	static const u8 set_samplerate_seq[] = { 0x00, 0x00, 0x00, 0x00,
1061 						 0x00, 0x00, 0x0b, 0x14,
1062 						 0x00, 0x00, 0x00, 0x01 };
1063 	static const u8 poll_ready_seq[] = { 0x00, 0x04, 0x00, 0x00,
1064 					     0x00, 0x00, 0x0b, 0x18 };
1065 	u8 *buf = kzalloc(MICROBOOK_BUF_SIZE, GFP_KERNEL);
1066 
1067 	if (!buf)
1068 		return -ENOMEM;
1069 
1070 	dev_info(&dev->dev, "Waiting for MOTU Microbook II to boot up...\n");
1071 
1072 	/* First we tell the device which sample rate to use. */
1073 	memcpy(buf, set_samplerate_seq, sizeof(set_samplerate_seq));
1074 	actual_length = sizeof(set_samplerate_seq);
1075 	err = snd_usb_motu_microbookii_communicate(dev, buf, MICROBOOK_BUF_SIZE,
1076 						   &actual_length);
1077 
1078 	if (err < 0) {
1079 		dev_err(&dev->dev,
1080 			"failed setting the sample rate for Motu MicroBook II: %d\n",
1081 			err);
1082 		goto free_buf;
1083 	}
1084 
1085 	/* Then we poll every 100 ms until the device informs of its readiness. */
1086 	while (true) {
1087 		if (++poll_attempts > 100) {
1088 			dev_err(&dev->dev,
1089 				"failed booting Motu MicroBook II: timeout\n");
1090 			err = -ENODEV;
1091 			goto free_buf;
1092 		}
1093 
1094 		memset(buf, 0, MICROBOOK_BUF_SIZE);
1095 		memcpy(buf, poll_ready_seq, sizeof(poll_ready_seq));
1096 
1097 		actual_length = sizeof(poll_ready_seq);
1098 		err = snd_usb_motu_microbookii_communicate(
1099 			dev, buf, MICROBOOK_BUF_SIZE, &actual_length);
1100 		if (err < 0) {
1101 			dev_err(&dev->dev,
1102 				"failed booting Motu MicroBook II: communication error %d\n",
1103 				err);
1104 			goto free_buf;
1105 		}
1106 
1107 		/* the device signals its readiness through a message of the
1108 		 * form
1109 		 *           XX 06 00 00 00 00 0b 18  00 00 00 01
1110 		 * If the device is not yet ready to accept audio data, the
1111 		 * last byte of that sequence is 00.
1112 		 */
1113 		if (actual_length == 12 && buf[actual_length - 1] == 1)
1114 			break;
1115 
1116 		msleep(100);
1117 	}
1118 
1119 	dev_info(&dev->dev, "MOTU MicroBook II ready\n");
1120 
1121 free_buf:
1122 	kfree(buf);
1123 	return err;
1124 }
1125 
1126 static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev)
1127 {
1128 	int ret;
1129 
1130 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
1131 		return -EINVAL;
1132 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1133 			      1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1134 			      0x0, 0, NULL, 0, 1000);
1135 
1136 	if (ret < 0)
1137 		return ret;
1138 
1139 	msleep(2000);
1140 
1141 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1142 			      1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1143 			      0x20, 0, NULL, 0, 1000);
1144 
1145 	if (ret < 0)
1146 		return ret;
1147 
1148 	return 0;
1149 }
1150 
1151 /*
1152  * Setup quirks
1153  */
1154 #define MAUDIO_SET		0x01 /* parse device_setup */
1155 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
1156 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
1157 #define MAUDIO_SET_96K		0x04 /* 48-96kHz rate if set, 8-48kHz otherwise */
1158 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
1159 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
1160 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
1161 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48kHz+Digital Input */
1162 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48kHz+No Digital Input */
1163 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48kHz+Digital Input */
1164 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48kHz+No Digital Input */
1165 
1166 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
1167 				      int iface, int altno)
1168 {
1169 	/* Reset ALL ifaces to 0 altsetting.
1170 	 * Call it for every possible altsetting of every interface.
1171 	 */
1172 	usb_set_interface(chip->dev, iface, 0);
1173 	if (chip->setup & MAUDIO_SET) {
1174 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
1175 			if (iface != 1 && iface != 2)
1176 				return 1; /* skip all interfaces but 1 and 2 */
1177 		} else {
1178 			unsigned int mask;
1179 			if (iface == 1 || iface == 2)
1180 				return 1; /* skip interfaces 1 and 2 */
1181 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1182 				return 1; /* skip this altsetting */
1183 			mask = chip->setup & MAUDIO_SET_MASK;
1184 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1185 				return 1; /* skip this altsetting */
1186 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1187 				return 1; /* skip this altsetting */
1188 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
1189 				return 1; /* skip this altsetting */
1190 		}
1191 	}
1192 	usb_audio_dbg(chip,
1193 		    "using altsetting %d for interface %d config %d\n",
1194 		    altno, iface, chip->setup);
1195 	return 0; /* keep this altsetting */
1196 }
1197 
1198 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
1199 					 int iface,
1200 					 int altno)
1201 {
1202 	/* Reset ALL ifaces to 0 altsetting.
1203 	 * Call it for every possible altsetting of every interface.
1204 	 */
1205 	usb_set_interface(chip->dev, iface, 0);
1206 
1207 	if (chip->setup & MAUDIO_SET) {
1208 		unsigned int mask;
1209 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
1210 			return 1; /* skip this altsetting */
1211 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1212 			return 1; /* skip this altsetting */
1213 		mask = chip->setup & MAUDIO_SET_MASK;
1214 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1215 			return 1; /* skip this altsetting */
1216 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1217 			return 1; /* skip this altsetting */
1218 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
1219 			return 1; /* skip this altsetting */
1220 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
1221 			return 1; /* skip this altsetting */
1222 	}
1223 
1224 	return 0; /* keep this altsetting */
1225 }
1226 
1227 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
1228 					   int iface, int altno)
1229 {
1230 	/* Reset ALL ifaces to 0 altsetting.
1231 	 * Call it for every possible altsetting of every interface.
1232 	 */
1233 	usb_set_interface(chip->dev, iface, 0);
1234 
1235 	/* possible configuration where both inputs and only one output is
1236 	 *used is not supported by the current setup
1237 	 */
1238 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
1239 		if (chip->setup & MAUDIO_SET_96K) {
1240 			if (altno != 3 && altno != 6)
1241 				return 1;
1242 		} else if (chip->setup & MAUDIO_SET_DI) {
1243 			if (iface == 4)
1244 				return 1; /* no analog input */
1245 			if (altno != 2 && altno != 5)
1246 				return 1; /* enable only altsets 2 and 5 */
1247 		} else {
1248 			if (iface == 5)
1249 				return 1; /* disable digialt input */
1250 			if (altno != 2 && altno != 5)
1251 				return 1; /* enalbe only altsets 2 and 5 */
1252 		}
1253 	} else {
1254 		/* keep only 16-Bit mode */
1255 		if (altno != 1)
1256 			return 1;
1257 	}
1258 
1259 	usb_audio_dbg(chip,
1260 		    "using altsetting %d for interface %d config %d\n",
1261 		    altno, iface, chip->setup);
1262 	return 0; /* keep this altsetting */
1263 }
1264 
1265 static int s1810c_skip_setting_quirk(struct snd_usb_audio *chip,
1266 					   int iface, int altno)
1267 {
1268 	/*
1269 	 * Altno settings:
1270 	 *
1271 	 * Playback (Interface 1):
1272 	 * 1: 6 Analog + 2 S/PDIF
1273 	 * 2: 6 Analog + 2 S/PDIF
1274 	 * 3: 6 Analog
1275 	 *
1276 	 * Capture (Interface 2):
1277 	 * 1: 8 Analog + 2 S/PDIF + 8 ADAT
1278 	 * 2: 8 Analog + 2 S/PDIF + 4 ADAT
1279 	 * 3: 8 Analog
1280 	 */
1281 
1282 	/*
1283 	 * I'll leave 2 as the default one and
1284 	 * use device_setup to switch to the
1285 	 * other two.
1286 	 */
1287 	if ((chip->setup == 0 || chip->setup > 2) && altno != 2)
1288 		return 1;
1289 	else if (chip->setup == 1 && altno != 1)
1290 		return 1;
1291 	else if (chip->setup == 2 && altno != 3)
1292 		return 1;
1293 
1294 	return 0;
1295 }
1296 
1297 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
1298 				  int iface,
1299 				  int altno)
1300 {
1301 	/* audiophile usb: skip altsets incompatible with device_setup */
1302 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
1303 		return audiophile_skip_setting_quirk(chip, iface, altno);
1304 	/* quattro usb: skip altsets incompatible with device_setup */
1305 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
1306 		return quattro_skip_setting_quirk(chip, iface, altno);
1307 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
1308 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
1309 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
1310 	/* presonus studio 1810c: skip altsets incompatible with device_setup */
1311 	if (chip->usb_id == USB_ID(0x0194f, 0x010c))
1312 		return s1810c_skip_setting_quirk(chip, iface, altno);
1313 
1314 
1315 	return 0;
1316 }
1317 
1318 int snd_usb_apply_boot_quirk(struct usb_device *dev,
1319 			     struct usb_interface *intf,
1320 			     const struct snd_usb_audio_quirk *quirk,
1321 			     unsigned int id)
1322 {
1323 	switch (id) {
1324 	case USB_ID(0x041e, 0x3000):
1325 		/* SB Extigy needs special boot-up sequence */
1326 		/* if more models come, this will go to the quirk list. */
1327 		return snd_usb_extigy_boot_quirk(dev, intf);
1328 
1329 	case USB_ID(0x041e, 0x3020):
1330 		/* SB Audigy 2 NX needs its own boot-up magic, too */
1331 		return snd_usb_audigy2nx_boot_quirk(dev);
1332 
1333 	case USB_ID(0x10f5, 0x0200):
1334 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
1335 		return snd_usb_cm106_boot_quirk(dev);
1336 
1337 	case USB_ID(0x0d8c, 0x0102):
1338 		/* C-Media CM6206 / CM106-Like Sound Device */
1339 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
1340 		return snd_usb_cm6206_boot_quirk(dev);
1341 
1342 	case USB_ID(0x0dba, 0x3000):
1343 		/* Digidesign Mbox 2 */
1344 		return snd_usb_mbox2_boot_quirk(dev);
1345 
1346 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
1347 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
1348 		return snd_usb_novation_boot_quirk(dev);
1349 
1350 	case USB_ID(0x133e, 0x0815):
1351 		/* Access Music VirusTI Desktop */
1352 		return snd_usb_accessmusic_boot_quirk(dev);
1353 
1354 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1355 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1356 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1357 		return snd_usb_nativeinstruments_boot_quirk(dev);
1358 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1359 		return snd_usb_fasttrackpro_boot_quirk(dev);
1360 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1361 		return snd_usb_gamecon780_boot_quirk(dev);
1362 	case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx 3 */
1363 		return snd_usb_axefx3_boot_quirk(dev);
1364 	case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II */
1365 		/*
1366 		 * For some reason interface 3 with vendor-spec class is
1367 		 * detected on MicroBook IIc.
1368 		 */
1369 		if (get_iface_desc(intf->altsetting)->bInterfaceClass ==
1370 		    USB_CLASS_VENDOR_SPEC &&
1371 		    get_iface_desc(intf->altsetting)->bInterfaceNumber < 3)
1372 			return snd_usb_motu_microbookii_boot_quirk(dev);
1373 		break;
1374 	}
1375 
1376 	return 0;
1377 }
1378 
1379 int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
1380 				  struct usb_interface *intf,
1381 				  const struct snd_usb_audio_quirk *quirk,
1382 				  unsigned int id)
1383 {
1384 	switch (id) {
1385 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
1386 		return snd_usb_motu_m_series_boot_quirk(dev);
1387 	}
1388 
1389 	return 0;
1390 }
1391 
1392 /*
1393  * check if the device uses big-endian samples
1394  */
1395 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1396 {
1397 	/* it depends on altsetting whether the device is big-endian or not */
1398 	switch (chip->usb_id) {
1399 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1400 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1401 			fp->altsetting == 5 || fp->altsetting == 6)
1402 			return 1;
1403 		break;
1404 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1405 		if (chip->setup == 0x00 ||
1406 			fp->altsetting == 1 || fp->altsetting == 2 ||
1407 			fp->altsetting == 3)
1408 			return 1;
1409 		break;
1410 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1411 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1412 			fp->altsetting == 5 || fp->altsetting == 6)
1413 			return 1;
1414 		break;
1415 	}
1416 	return 0;
1417 }
1418 
1419 /*
1420  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1421  * not for interface.
1422  */
1423 
1424 enum {
1425 	EMU_QUIRK_SR_44100HZ = 0,
1426 	EMU_QUIRK_SR_48000HZ,
1427 	EMU_QUIRK_SR_88200HZ,
1428 	EMU_QUIRK_SR_96000HZ,
1429 	EMU_QUIRK_SR_176400HZ,
1430 	EMU_QUIRK_SR_192000HZ
1431 };
1432 
1433 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1434 				 struct audioformat *fmt)
1435 {
1436 	unsigned char emu_samplerate_id = 0;
1437 
1438 	/* When capture is active
1439 	 * sample rate shouldn't be changed
1440 	 * by playback substream
1441 	 */
1442 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1443 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1444 			return;
1445 	}
1446 
1447 	switch (fmt->rate_min) {
1448 	case 48000:
1449 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1450 		break;
1451 	case 88200:
1452 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1453 		break;
1454 	case 96000:
1455 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1456 		break;
1457 	case 176400:
1458 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1459 		break;
1460 	case 192000:
1461 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1462 		break;
1463 	default:
1464 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1465 		break;
1466 	}
1467 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1468 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1469 }
1470 
1471 
1472 /*
1473  * Pioneer DJ DJM-900NXS2
1474  * Device needs to know the sample rate each time substream is started
1475  */
1476 static int pioneer_djm_set_format_quirk(struct snd_usb_substream *subs)
1477 {
1478 
1479 	/* Convert sample rate value to little endian */
1480 	u8 sr[3];
1481 
1482 	sr[0] = subs->cur_rate & 0xff;
1483 	sr[1] = (subs->cur_rate >> 8) & 0xff;
1484 	sr[2] = (subs->cur_rate >> 16) & 0xff;
1485 
1486 	/* Configure device */
1487 	usb_set_interface(subs->dev, 0, 1);
1488 	snd_usb_ctl_msg(subs->stream->chip->dev,
1489 		usb_rcvctrlpipe(subs->stream->chip->dev, 0),
1490 		0x01, 0x22, 0x0100, 0x0082, &sr, 0x0003);
1491 
1492 	return 0;
1493 }
1494 
1495 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1496 			      struct audioformat *fmt)
1497 {
1498 	switch (subs->stream->chip->usb_id) {
1499 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1500 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1501 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1502 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1503 		set_format_emu_quirk(subs, fmt);
1504 		break;
1505 	case USB_ID(0x2b73, 0x000a): /* Pioneer DJ DJM-900NXS2 */
1506 	case USB_ID(0x2b73, 0x0017): /* Pioneer DJ DJM-250MK2 */
1507 		pioneer_djm_set_format_quirk(subs);
1508 		break;
1509 	case USB_ID(0x534d, 0x2109): /* MacroSilicon MS2109 */
1510 		subs->stream_offset_adj = 2;
1511 		break;
1512 	}
1513 }
1514 
1515 bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
1516 {
1517 	/* devices which do not support reading the sample rate. */
1518 	switch (chip->usb_id) {
1519 	case USB_ID(0x041e, 0x4080): /* Creative Live Cam VF0610 */
1520 	case USB_ID(0x04d8, 0xfeea): /* Benchmark DAC1 Pre */
1521 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
1522 	case USB_ID(0x05a3, 0x9420): /* ELP HD USB Camera */
1523 	case USB_ID(0x05a7, 0x1020): /* Bose Companion 5 */
1524 	case USB_ID(0x074d, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
1525 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
1526 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
1527 	case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
1528 	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
1529 		return true;
1530 	}
1531 
1532 	/* devices of these vendors don't support reading rate, either */
1533 	switch (USB_ID_VENDOR(chip->usb_id)) {
1534 	case 0x045e: /* MS Lifecam */
1535 	case 0x047f: /* Plantronics */
1536 	case 0x1de7: /* Phoenix Audio */
1537 		return true;
1538 	}
1539 
1540 	return false;
1541 }
1542 
1543 /* ITF-USB DSD based DACs need a vendor cmd to switch
1544  * between PCM and native DSD mode
1545  */
1546 static bool is_itf_usb_dsd_dac(unsigned int id)
1547 {
1548 	switch (id) {
1549 	case USB_ID(0x154e, 0x1002): /* Denon DCD-1500RE */
1550 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
1551 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
1552 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
1553 	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
1554 	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
1555 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
1556 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
1557 		return true;
1558 	}
1559 	return false;
1560 }
1561 
1562 int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
1563 			      struct audioformat *fmt)
1564 {
1565 	struct usb_device *dev = subs->dev;
1566 	int err;
1567 
1568 	if (is_itf_usb_dsd_dac(subs->stream->chip->usb_id)) {
1569 		/* First switch to alt set 0, otherwise the mode switch cmd
1570 		 * will not be accepted by the DAC
1571 		 */
1572 		err = usb_set_interface(dev, fmt->iface, 0);
1573 		if (err < 0)
1574 			return err;
1575 
1576 		msleep(20); /* Delay needed after setting the interface */
1577 
1578 		/* Vendor mode switch cmd is required. */
1579 		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
1580 			/* DSD mode (DSD_U32) requested */
1581 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1582 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1583 					      1, 1, NULL, 0);
1584 			if (err < 0)
1585 				return err;
1586 
1587 		} else {
1588 			/* PCM or DOP mode (S32) requested */
1589 			/* PCM mode (S16) requested */
1590 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1591 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1592 					      0, 1, NULL, 0);
1593 			if (err < 0)
1594 				return err;
1595 
1596 		}
1597 		msleep(20);
1598 	}
1599 	return 0;
1600 }
1601 
1602 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1603 {
1604 	/*
1605 	 * "Playback Design" products send bogus feedback data at the start
1606 	 * of the stream. Ignore them.
1607 	 */
1608 	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
1609 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1610 		ep->skip_packets = 4;
1611 
1612 	/*
1613 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1614 	 * world latency varies by approx. +/- 50 frames (at 96kHz) each time
1615 	 * the stream is (re)started. When skipping packets 16 at endpoint
1616 	 * start up, the real world latency is stable within +/- 1 frame (also
1617 	 * across power cycles).
1618 	 */
1619 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1620 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1621 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1622 		ep->skip_packets = 16;
1623 
1624 	/* Work around devices that report unreasonable feedback data */
1625 	if ((ep->chip->usb_id == USB_ID(0x0644, 0x8038) ||  /* TEAC UD-H01 */
1626 	     ep->chip->usb_id == USB_ID(0x1852, 0x5034)) && /* T+A Dac8 */
1627 	    ep->syncmaxsize == 4)
1628 		ep->tenor_fb_quirk = 1;
1629 }
1630 
1631 void snd_usb_set_interface_quirk(struct usb_device *dev)
1632 {
1633 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1634 
1635 	if (!chip)
1636 		return;
1637 	/*
1638 	 * "Playback Design" products need a 50ms delay after setting the
1639 	 * USB interface.
1640 	 */
1641 	switch (USB_ID_VENDOR(chip->usb_id)) {
1642 	case 0x23ba: /* Playback Design */
1643 	case 0x0644: /* TEAC Corp. */
1644 		msleep(50);
1645 		break;
1646 	}
1647 }
1648 
1649 /* quirk applied after snd_usb_ctl_msg(); not applied during boot quirks */
1650 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1651 			   __u8 request, __u8 requesttype, __u16 value,
1652 			   __u16 index, void *data, __u16 size)
1653 {
1654 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1655 
1656 	if (!chip)
1657 		return;
1658 	/*
1659 	 * "Playback Design" products need a 20ms delay after each
1660 	 * class compliant request
1661 	 */
1662 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1663 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1664 		msleep(20);
1665 
1666 	/*
1667 	 * "TEAC Corp." products need a 20ms delay after each
1668 	 * class compliant request
1669 	 */
1670 	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
1671 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1672 		msleep(20);
1673 
1674 	/* ITF-USB DSD based DACs functionality need a delay
1675 	 * after each class compliant request
1676 	 */
1677 	if (is_itf_usb_dsd_dac(chip->usb_id)
1678 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1679 		msleep(20);
1680 
1681 	/* Zoom R16/24, Logitech H650e/H570e, Jabra 550a, Kingston HyperX
1682 	 *  needs a tiny delay here, otherwise requests like get/set
1683 	 *  frequency return as failed despite actually succeeding.
1684 	 */
1685 	if ((chip->usb_id == USB_ID(0x1686, 0x00dd) ||
1686 	     chip->usb_id == USB_ID(0x046d, 0x0a46) ||
1687 	     chip->usb_id == USB_ID(0x046d, 0x0a56) ||
1688 	     chip->usb_id == USB_ID(0x0b0e, 0x0349) ||
1689 	     chip->usb_id == USB_ID(0x0951, 0x16ad)) &&
1690 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1691 		usleep_range(1000, 2000);
1692 
1693 	/*
1694 	 * Samsung USBC Headset (AKG) need a tiny delay after each
1695 	 * class compliant request. (Model number: AAM625R or AAM627R)
1696 	 */
1697 	if (chip->usb_id == USB_ID(0x04e8, 0xa051) &&
1698 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1699 		usleep_range(5000, 6000);
1700 }
1701 
1702 /*
1703  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1704  * augment the PCM format bit-field for DSD types. The UAC standards
1705  * don't have a designated bit field to denote DSD-capable interfaces,
1706  * hence all hardware that is known to support this format has to be
1707  * listed here.
1708  */
1709 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1710 					struct audioformat *fp,
1711 					unsigned int sample_bytes)
1712 {
1713 	struct usb_interface *iface;
1714 
1715 	/* Playback Designs */
1716 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1717 	    USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
1718 		switch (fp->altsetting) {
1719 		case 1:
1720 			fp->dsd_dop = true;
1721 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1722 		case 2:
1723 			fp->dsd_bitrev = true;
1724 			return SNDRV_PCM_FMTBIT_DSD_U8;
1725 		case 3:
1726 			fp->dsd_bitrev = true;
1727 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1728 		}
1729 	}
1730 
1731 	/* XMOS based USB DACs */
1732 	switch (chip->usb_id) {
1733 	case USB_ID(0x1511, 0x0037): /* AURALiC VEGA */
1734 	case USB_ID(0x2522, 0x0012): /* LH Labs VI DAC Infinity */
1735 	case USB_ID(0x2772, 0x0230): /* Pro-Ject Pre Box S2 Digital */
1736 		if (fp->altsetting == 2)
1737 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1738 		break;
1739 
1740 	case USB_ID(0x0d8c, 0x0316): /* Hegel HD12 DSD */
1741 	case USB_ID(0x10cb, 0x0103): /* The Bit Opus #3; with fp->dsd_raw */
1742 	case USB_ID(0x16d0, 0x06b2): /* NuPrime DAC-10 */
1743 	case USB_ID(0x16d0, 0x09dd): /* Encore mDSD */
1744 	case USB_ID(0x16d0, 0x0733): /* Furutech ADL Stratos */
1745 	case USB_ID(0x16d0, 0x09db): /* NuPrime Audio DAC-9 */
1746 	case USB_ID(0x1db5, 0x0003): /* Bryston BDA3 */
1747 	case USB_ID(0x22e1, 0xca01): /* HDTA Serenade DSD */
1748 	case USB_ID(0x249c, 0x9326): /* M2Tech Young MkIII */
1749 	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
1750 	case USB_ID(0x2622, 0x0041): /* Audiolab M-DAC+ */
1751 	case USB_ID(0x27f7, 0x3002): /* W4S DAC-2v2SE */
1752 	case USB_ID(0x29a2, 0x0086): /* Mutec MC3+ USB */
1753 	case USB_ID(0x6b42, 0x0042): /* MSB Technology */
1754 		if (fp->altsetting == 3)
1755 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1756 		break;
1757 
1758 	/* Amanero Combo384 USB based DACs with native DSD support */
1759 	case USB_ID(0x16d0, 0x071a):  /* Amanero - Combo384 */
1760 	case USB_ID(0x2ab6, 0x0004):  /* T+A DAC8DSD-V2.0, MP1000E-V2.0, MP2000R-V2.0, MP2500R-V2.0, MP3100HV-V2.0 */
1761 	case USB_ID(0x2ab6, 0x0005):  /* T+A USB HD Audio 1 */
1762 	case USB_ID(0x2ab6, 0x0006):  /* T+A USB HD Audio 2 */
1763 		if (fp->altsetting == 2) {
1764 			switch (le16_to_cpu(chip->dev->descriptor.bcdDevice)) {
1765 			case 0x199:
1766 				return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1767 			case 0x19b:
1768 			case 0x203:
1769 				return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1770 			default:
1771 				break;
1772 			}
1773 		}
1774 		break;
1775 	case USB_ID(0x16d0, 0x0a23):
1776 		if (fp->altsetting == 2)
1777 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1778 		break;
1779 
1780 	default:
1781 		break;
1782 	}
1783 
1784 	/* ITF-USB DSD based DACs */
1785 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1786 		iface = usb_ifnum_to_if(chip->dev, fp->iface);
1787 
1788 		/* Altsetting 2 support native DSD if the num of altsets is
1789 		 * three (0-2),
1790 		 * Altsetting 3 support native DSD if the num of altsets is
1791 		 * four (0-3).
1792 		 */
1793 		if (fp->altsetting == iface->num_altsetting - 1)
1794 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1795 	}
1796 
1797 	/* Mostly generic method to detect many DSD-capable implementations -
1798 	 * from XMOS/Thesycon
1799 	 */
1800 	switch (USB_ID_VENDOR(chip->usb_id)) {
1801 	case 0x152a:  /* Thesycon devices */
1802 	case 0x20b1:  /* XMOS based devices */
1803 	case 0x22d9:  /* Oppo */
1804 	case 0x23ba:  /* Playback Designs */
1805 	case 0x25ce:  /* Mytek devices */
1806 	case 0x278b:  /* Rotel? */
1807 	case 0x292b:  /* Gustard/Ess based devices */
1808 	case 0x2ab6:  /* T+A devices */
1809 	case 0x3842:  /* EVGA */
1810 	case 0xc502:  /* HiBy devices */
1811 		if (fp->dsd_raw)
1812 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1813 		break;
1814 	default:
1815 		break;
1816 
1817 	}
1818 
1819 	return 0;
1820 }
1821 
1822 void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
1823 					  struct audioformat *fp,
1824 					  int stream)
1825 {
1826 	switch (chip->usb_id) {
1827 	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1828 		/* Optoplay sets the sample rate attribute although
1829 		 * it seems not supporting it in fact.
1830 		 */
1831 		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
1832 		break;
1833 	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
1834 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1835 		/* doesn't set the sample rate attribute, but supports it */
1836 		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
1837 		break;
1838 	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
1839 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1840 	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
1841 	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
1842 					an older model 77d:223) */
1843 	/*
1844 	 * plantronics headset and Griffin iMic have set adaptive-in
1845 	 * although it's really not...
1846 	 */
1847 		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
1848 		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1849 			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
1850 		else
1851 			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
1852 		break;
1853 	case USB_ID(0x07fd, 0x0004):  /* MOTU MicroBook IIc */
1854 		/*
1855 		 * MaxPacketsOnly attribute is erroneously set in endpoint
1856 		 * descriptors. As a result this card produces noise with
1857 		 * all sample rates other than 96 kHz.
1858 		 */
1859 		fp->attributes &= ~UAC_EP_CS_ATTR_FILL_MAX;
1860 		break;
1861 	}
1862 }
1863 
1864 /*
1865  * registration quirk:
1866  * the registration is skipped if a device matches with the given ID,
1867  * unless the interface reaches to the defined one.  This is for delaying
1868  * the registration until the last known interface, so that the card and
1869  * devices appear at the same time.
1870  */
1871 
1872 struct registration_quirk {
1873 	unsigned int usb_id;	/* composed via USB_ID() */
1874 	unsigned int interface;	/* the interface to trigger register */
1875 };
1876 
1877 #define REG_QUIRK_ENTRY(vendor, product, iface) \
1878 	{ .usb_id = USB_ID(vendor, product), .interface = (iface) }
1879 
1880 static const struct registration_quirk registration_quirks[] = {
1881 	REG_QUIRK_ENTRY(0x0951, 0x16d8, 2),	/* Kingston HyperX AMP */
1882 	REG_QUIRK_ENTRY(0x0951, 0x16ed, 2),	/* Kingston HyperX Cloud Alpha S */
1883 	REG_QUIRK_ENTRY(0x0951, 0x16ea, 2),	/* Kingston HyperX Cloud Flight S */
1884 	{ 0 }					/* terminator */
1885 };
1886 
1887 /* return true if skipping registration */
1888 bool snd_usb_registration_quirk(struct snd_usb_audio *chip, int iface)
1889 {
1890 	const struct registration_quirk *q;
1891 
1892 	for (q = registration_quirks; q->usb_id; q++)
1893 		if (chip->usb_id == q->usb_id)
1894 			return iface != q->interface;
1895 
1896 	/* Register as normal */
1897 	return false;
1898 }
1899