xref: /openbmc/linux/sound/usb/quirks.c (revision 5edb7691)
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 /*
522  * audio-interface quirks
523  *
524  * returns zero if no standard audio/MIDI parsing is needed.
525  * returns a positive value if standard audio/midi interfaces are parsed
526  * after this.
527  * returns a negative value at error.
528  */
529 int snd_usb_create_quirk(struct snd_usb_audio *chip,
530 			 struct usb_interface *iface,
531 			 struct usb_driver *driver,
532 			 const struct snd_usb_audio_quirk *quirk)
533 {
534 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
535 				    struct usb_interface *,
536 				    struct usb_driver *,
537 				    const struct snd_usb_audio_quirk *);
538 	static const quirk_func_t quirk_funcs[] = {
539 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
540 		[QUIRK_COMPOSITE] = create_composite_quirk,
541 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
542 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
543 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
544 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
545 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
546 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
547 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
548 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
549 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
550 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
551 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
552 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
553 		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
554 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
555 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
556 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
557 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
558 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
559 		[QUIRK_SETUP_FMT_AFTER_RESUME] = setup_fmt_after_resume_quirk,
560 	};
561 
562 	if (quirk->type < QUIRK_TYPE_COUNT) {
563 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
564 	} else {
565 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
566 		return -ENXIO;
567 	}
568 }
569 
570 /*
571  * boot quirks
572  */
573 
574 #define EXTIGY_FIRMWARE_SIZE_OLD 794
575 #define EXTIGY_FIRMWARE_SIZE_NEW 483
576 
577 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
578 {
579 	struct usb_host_config *config = dev->actconfig;
580 	int err;
581 
582 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
583 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
584 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
585 		/* Send message to force it to reconnect with full interface. */
586 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
587 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
588 		if (err < 0)
589 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
590 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
591 				&dev->descriptor, sizeof(dev->descriptor));
592 		config = dev->actconfig;
593 		if (err < 0)
594 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
595 		err = usb_reset_configuration(dev);
596 		if (err < 0)
597 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
598 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
599 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
600 		return -ENODEV; /* quit this anyway */
601 	}
602 	return 0;
603 }
604 
605 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
606 {
607 	u8 buf = 1;
608 
609 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
610 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
611 			0, 0, &buf, 1);
612 	if (buf == 0) {
613 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
614 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
615 				1, 2000, NULL, 0);
616 		return -ENODEV;
617 	}
618 	return 0;
619 }
620 
621 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
622 {
623 	int err;
624 
625 	if (dev->actconfig->desc.bConfigurationValue == 1) {
626 		dev_info(&dev->dev,
627 			   "Fast Track Pro switching to config #2\n");
628 		/* This function has to be available by the usb core module.
629 		 * if it is not avialable the boot quirk has to be left out
630 		 * and the configuration has to be set by udev or hotplug
631 		 * rules
632 		 */
633 		err = usb_driver_set_configuration(dev, 2);
634 		if (err < 0)
635 			dev_dbg(&dev->dev,
636 				"error usb_driver_set_configuration: %d\n",
637 				err);
638 		/* Always return an error, so that we stop creating a device
639 		   that will just be destroyed and recreated with a new
640 		   configuration */
641 		return -ENODEV;
642 	} else
643 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
644 
645 	return 0;
646 }
647 
648 /*
649  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
650  * documented in the device's data sheet.
651  */
652 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
653 {
654 	u8 buf[4];
655 	buf[0] = 0x20;
656 	buf[1] = value & 0xff;
657 	buf[2] = (value >> 8) & 0xff;
658 	buf[3] = reg;
659 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
660 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
661 			       0, 0, &buf, 4);
662 }
663 
664 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
665 {
666 	/*
667 	 * Enable line-out driver mode, set headphone source to front
668 	 * channels, enable stereo mic.
669 	 */
670 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
671 }
672 
673 /*
674  * CM6206 registers from the CM6206 datasheet rev 2.1
675  */
676 #define CM6206_REG0_DMA_MASTER BIT(15)
677 #define CM6206_REG0_SPDIFO_RATE_48K (2 << 12)
678 #define CM6206_REG0_SPDIFO_RATE_96K (7 << 12)
679 /* Bit 4 thru 11 is the S/PDIF category code */
680 #define CM6206_REG0_SPDIFO_CAT_CODE_GENERAL (0 << 4)
681 #define CM6206_REG0_SPDIFO_EMPHASIS_CD BIT(3)
682 #define CM6206_REG0_SPDIFO_COPYRIGHT_NA BIT(2)
683 #define CM6206_REG0_SPDIFO_NON_AUDIO BIT(1)
684 #define CM6206_REG0_SPDIFO_PRO_FORMAT BIT(0)
685 
686 #define CM6206_REG1_TEST_SEL_CLK BIT(14)
687 #define CM6206_REG1_PLLBIN_EN BIT(13)
688 #define CM6206_REG1_SOFT_MUTE_EN BIT(12)
689 #define CM6206_REG1_GPIO4_OUT BIT(11)
690 #define CM6206_REG1_GPIO4_OE BIT(10)
691 #define CM6206_REG1_GPIO3_OUT BIT(9)
692 #define CM6206_REG1_GPIO3_OE BIT(8)
693 #define CM6206_REG1_GPIO2_OUT BIT(7)
694 #define CM6206_REG1_GPIO2_OE BIT(6)
695 #define CM6206_REG1_GPIO1_OUT BIT(5)
696 #define CM6206_REG1_GPIO1_OE BIT(4)
697 #define CM6206_REG1_SPDIFO_INVALID BIT(3)
698 #define CM6206_REG1_SPDIF_LOOP_EN BIT(2)
699 #define CM6206_REG1_SPDIFO_DIS BIT(1)
700 #define CM6206_REG1_SPDIFI_MIX BIT(0)
701 
702 #define CM6206_REG2_DRIVER_ON BIT(15)
703 #define CM6206_REG2_HEADP_SEL_SIDE_CHANNELS (0 << 13)
704 #define CM6206_REG2_HEADP_SEL_SURROUND_CHANNELS (1 << 13)
705 #define CM6206_REG2_HEADP_SEL_CENTER_SUBW (2 << 13)
706 #define CM6206_REG2_HEADP_SEL_FRONT_CHANNELS (3 << 13)
707 #define CM6206_REG2_MUTE_HEADPHONE_RIGHT BIT(12)
708 #define CM6206_REG2_MUTE_HEADPHONE_LEFT BIT(11)
709 #define CM6206_REG2_MUTE_REAR_SURROUND_RIGHT BIT(10)
710 #define CM6206_REG2_MUTE_REAR_SURROUND_LEFT BIT(9)
711 #define CM6206_REG2_MUTE_SIDE_SURROUND_RIGHT BIT(8)
712 #define CM6206_REG2_MUTE_SIDE_SURROUND_LEFT BIT(7)
713 #define CM6206_REG2_MUTE_SUBWOOFER BIT(6)
714 #define CM6206_REG2_MUTE_CENTER BIT(5)
715 #define CM6206_REG2_MUTE_RIGHT_FRONT BIT(3)
716 #define CM6206_REG2_MUTE_LEFT_FRONT BIT(3)
717 #define CM6206_REG2_EN_BTL BIT(2)
718 #define CM6206_REG2_MCUCLKSEL_1_5_MHZ (0)
719 #define CM6206_REG2_MCUCLKSEL_3_MHZ (1)
720 #define CM6206_REG2_MCUCLKSEL_6_MHZ (2)
721 #define CM6206_REG2_MCUCLKSEL_12_MHZ (3)
722 
723 /* Bit 11..13 sets the sensitivity to FLY tuner volume control VP/VD signal */
724 #define CM6206_REG3_FLYSPEED_DEFAULT (2 << 11)
725 #define CM6206_REG3_VRAP25EN BIT(10)
726 #define CM6206_REG3_MSEL1 BIT(9)
727 #define CM6206_REG3_SPDIFI_RATE_44_1K BIT(0 << 7)
728 #define CM6206_REG3_SPDIFI_RATE_48K BIT(2 << 7)
729 #define CM6206_REG3_SPDIFI_RATE_32K BIT(3 << 7)
730 #define CM6206_REG3_PINSEL BIT(6)
731 #define CM6206_REG3_FOE BIT(5)
732 #define CM6206_REG3_ROE BIT(4)
733 #define CM6206_REG3_CBOE BIT(3)
734 #define CM6206_REG3_LOSE BIT(2)
735 #define CM6206_REG3_HPOE BIT(1)
736 #define CM6206_REG3_SPDIFI_CANREC BIT(0)
737 
738 #define CM6206_REG5_DA_RSTN BIT(13)
739 #define CM6206_REG5_AD_RSTN BIT(12)
740 #define CM6206_REG5_SPDIFO_AD2SPDO BIT(12)
741 #define CM6206_REG5_SPDIFO_SEL_FRONT (0 << 9)
742 #define CM6206_REG5_SPDIFO_SEL_SIDE_SUR (1 << 9)
743 #define CM6206_REG5_SPDIFO_SEL_CEN_LFE (2 << 9)
744 #define CM6206_REG5_SPDIFO_SEL_REAR_SUR (3 << 9)
745 #define CM6206_REG5_CODECM BIT(8)
746 #define CM6206_REG5_EN_HPF BIT(7)
747 #define CM6206_REG5_T_SEL_DSDA4 BIT(6)
748 #define CM6206_REG5_T_SEL_DSDA3 BIT(5)
749 #define CM6206_REG5_T_SEL_DSDA2 BIT(4)
750 #define CM6206_REG5_T_SEL_DSDA1 BIT(3)
751 #define CM6206_REG5_T_SEL_DSDAD_NORMAL 0
752 #define CM6206_REG5_T_SEL_DSDAD_FRONT 4
753 #define CM6206_REG5_T_SEL_DSDAD_S_SURROUND 5
754 #define CM6206_REG5_T_SEL_DSDAD_CEN_LFE 6
755 #define CM6206_REG5_T_SEL_DSDAD_R_SURROUND 7
756 
757 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
758 {
759 	int err  = 0, reg;
760 	int val[] = {
761 		/*
762 		 * Values here are chosen based on sniffing USB traffic
763 		 * under Windows.
764 		 *
765 		 * REG0: DAC is master, sample rate 48kHz, no copyright
766 		 */
767 		CM6206_REG0_SPDIFO_RATE_48K |
768 		CM6206_REG0_SPDIFO_COPYRIGHT_NA,
769 		/*
770 		 * REG1: PLL binary search enable, soft mute enable.
771 		 */
772 		CM6206_REG1_PLLBIN_EN |
773 		CM6206_REG1_SOFT_MUTE_EN,
774 		/*
775 		 * REG2: enable output drivers,
776 		 * select front channels to the headphone output,
777 		 * then mute the headphone channels, run the MCU
778 		 * at 1.5 MHz.
779 		 */
780 		CM6206_REG2_DRIVER_ON |
781 		CM6206_REG2_HEADP_SEL_FRONT_CHANNELS |
782 		CM6206_REG2_MUTE_HEADPHONE_RIGHT |
783 		CM6206_REG2_MUTE_HEADPHONE_LEFT,
784 		/*
785 		 * REG3: default flyspeed, set 2.5V mic bias
786 		 * enable all line out ports and enable SPDIF
787 		 */
788 		CM6206_REG3_FLYSPEED_DEFAULT |
789 		CM6206_REG3_VRAP25EN |
790 		CM6206_REG3_FOE |
791 		CM6206_REG3_ROE |
792 		CM6206_REG3_CBOE |
793 		CM6206_REG3_LOSE |
794 		CM6206_REG3_HPOE |
795 		CM6206_REG3_SPDIFI_CANREC,
796 		/* REG4 is just a bunch of GPIO lines */
797 		0x0000,
798 		/* REG5: de-assert AD/DA reset signals */
799 		CM6206_REG5_DA_RSTN |
800 		CM6206_REG5_AD_RSTN };
801 
802 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
803 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
804 		if (err < 0)
805 			return err;
806 	}
807 
808 	return err;
809 }
810 
811 /* quirk for Plantronics GameCom 780 with CM6302 chip */
812 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
813 {
814 	/* set the initial volume and don't change; other values are either
815 	 * too loud or silent due to firmware bug (bko#65251)
816 	 */
817 	u8 buf[2] = { 0x74, 0xe3 };
818 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
819 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
820 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
821 }
822 
823 /*
824  * Novation Twitch DJ controller
825  * Focusrite Novation Saffire 6 USB audio card
826  */
827 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
828 {
829 	/* preemptively set up the device because otherwise the
830 	 * raw MIDI endpoints are not active */
831 	usb_set_interface(dev, 0, 1);
832 	return 0;
833 }
834 
835 /*
836  * This call will put the synth in "USB send" mode, i.e it will send MIDI
837  * messages through USB (this is disabled at startup). The synth will
838  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
839  * sign on its LCD. Values here are chosen based on sniffing USB traffic
840  * under Windows.
841  */
842 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
843 {
844 	int err, actual_length;
845 	/* "midi send" enable */
846 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
847 	void *buf;
848 
849 	if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x05)))
850 		return -EINVAL;
851 	buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
852 	if (!buf)
853 		return -ENOMEM;
854 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
855 			ARRAY_SIZE(seq), &actual_length, 1000);
856 	kfree(buf);
857 	if (err < 0)
858 		return err;
859 
860 	return 0;
861 }
862 
863 /*
864  * Some sound cards from Native Instruments are in fact compliant to the USB
865  * audio standard of version 2 and other approved USB standards, even though
866  * they come up as vendor-specific device when first connected.
867  *
868  * However, they can be told to come up with a new set of descriptors
869  * upon their next enumeration, and the interfaces announced by the new
870  * descriptors will then be handled by the kernel's class drivers. As the
871  * product ID will also change, no further checks are required.
872  */
873 
874 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
875 {
876 	int ret;
877 
878 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
879 		return -EINVAL;
880 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
881 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
882 				  1, 0, NULL, 0, 1000);
883 
884 	if (ret < 0)
885 		return ret;
886 
887 	usb_reset_device(dev);
888 
889 	/* return -EAGAIN, so the creation of an audio interface for this
890 	 * temporary device is aborted. The device will reconnect with a
891 	 * new product ID */
892 	return -EAGAIN;
893 }
894 
895 static void mbox2_setup_48_24_magic(struct usb_device *dev)
896 {
897 	u8 srate[3];
898 	u8 temp[12];
899 
900 	/* Choose 48000Hz permanently */
901 	srate[0] = 0x80;
902 	srate[1] = 0xbb;
903 	srate[2] = 0x00;
904 
905 	/* Send the magic! */
906 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
907 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
908 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
909 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
910 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
911 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
912 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
913 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
914 	return;
915 }
916 
917 /* Digidesign Mbox 2 needs to load firmware onboard
918  * and driver must wait a few seconds for initialisation.
919  */
920 
921 #define MBOX2_FIRMWARE_SIZE    646
922 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
923 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
924 
925 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
926 {
927 	struct usb_host_config *config = dev->actconfig;
928 	int err;
929 	u8 bootresponse[0x12];
930 	int fwsize;
931 	int count;
932 
933 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
934 
935 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
936 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
937 		return -ENODEV;
938 	}
939 
940 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
941 
942 	count = 0;
943 	bootresponse[0] = MBOX2_BOOT_LOADING;
944 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
945 		msleep(500); /* 0.5 second delay */
946 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
947 			/* Control magic - load onboard firmware */
948 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
949 		if (bootresponse[0] == MBOX2_BOOT_READY)
950 			break;
951 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
952 		count++;
953 	}
954 
955 	if (bootresponse[0] != MBOX2_BOOT_READY) {
956 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
957 		return -ENODEV;
958 	}
959 
960 	dev_dbg(&dev->dev, "device initialised!\n");
961 
962 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
963 		&dev->descriptor, sizeof(dev->descriptor));
964 	config = dev->actconfig;
965 	if (err < 0)
966 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
967 
968 	err = usb_reset_configuration(dev);
969 	if (err < 0)
970 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
971 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
972 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
973 
974 	mbox2_setup_48_24_magic(dev);
975 
976 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
977 
978 	return 0; /* Successful boot */
979 }
980 
981 static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
982 {
983 	int err;
984 
985 	dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
986 
987 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
988 		return -EINVAL;
989 	/* If the Axe-Fx III has not fully booted, it will timeout when trying
990 	 * to enable the audio streaming interface. A more generous timeout is
991 	 * used here to detect when the Axe-Fx III has finished booting as the
992 	 * set interface message will be acked once it has
993 	 */
994 	err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
995 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
996 				1, 1, NULL, 0, 120000);
997 	if (err < 0) {
998 		dev_err(&dev->dev,
999 			"failed waiting for Axe-Fx III to boot: %d\n", err);
1000 		return err;
1001 	}
1002 
1003 	dev_dbg(&dev->dev, "Axe-Fx III is now ready\n");
1004 
1005 	err = usb_set_interface(dev, 1, 0);
1006 	if (err < 0)
1007 		dev_dbg(&dev->dev,
1008 			"error stopping Axe-Fx III interface: %d\n", err);
1009 
1010 	return 0;
1011 }
1012 
1013 
1014 #define MICROBOOK_BUF_SIZE 128
1015 
1016 static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
1017 						int buf_size, int *length)
1018 {
1019 	int err, actual_length;
1020 
1021 	if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x01)))
1022 		return -EINVAL;
1023 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x01), buf, *length,
1024 				&actual_length, 1000);
1025 	if (err < 0)
1026 		return err;
1027 
1028 	print_hex_dump(KERN_DEBUG, "MicroBookII snd: ", DUMP_PREFIX_NONE, 16, 1,
1029 		       buf, actual_length, false);
1030 
1031 	memset(buf, 0, buf_size);
1032 
1033 	if (snd_usb_pipe_sanity_check(dev, usb_rcvintpipe(dev, 0x82)))
1034 		return -EINVAL;
1035 	err = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 0x82), buf, buf_size,
1036 				&actual_length, 1000);
1037 	if (err < 0)
1038 		return err;
1039 
1040 	print_hex_dump(KERN_DEBUG, "MicroBookII rcv: ", DUMP_PREFIX_NONE, 16, 1,
1041 		       buf, actual_length, false);
1042 
1043 	*length = actual_length;
1044 	return 0;
1045 }
1046 
1047 static int snd_usb_motu_microbookii_boot_quirk(struct usb_device *dev)
1048 {
1049 	int err, actual_length, poll_attempts = 0;
1050 	static const u8 set_samplerate_seq[] = { 0x00, 0x00, 0x00, 0x00,
1051 						 0x00, 0x00, 0x0b, 0x14,
1052 						 0x00, 0x00, 0x00, 0x01 };
1053 	static const u8 poll_ready_seq[] = { 0x00, 0x04, 0x00, 0x00,
1054 					     0x00, 0x00, 0x0b, 0x18 };
1055 	u8 *buf = kzalloc(MICROBOOK_BUF_SIZE, GFP_KERNEL);
1056 
1057 	if (!buf)
1058 		return -ENOMEM;
1059 
1060 	dev_info(&dev->dev, "Waiting for MOTU Microbook II to boot up...\n");
1061 
1062 	/* First we tell the device which sample rate to use. */
1063 	memcpy(buf, set_samplerate_seq, sizeof(set_samplerate_seq));
1064 	actual_length = sizeof(set_samplerate_seq);
1065 	err = snd_usb_motu_microbookii_communicate(dev, buf, MICROBOOK_BUF_SIZE,
1066 						   &actual_length);
1067 
1068 	if (err < 0) {
1069 		dev_err(&dev->dev,
1070 			"failed setting the sample rate for Motu MicroBook II: %d\n",
1071 			err);
1072 		goto free_buf;
1073 	}
1074 
1075 	/* Then we poll every 100 ms until the device informs of its readiness. */
1076 	while (true) {
1077 		if (++poll_attempts > 100) {
1078 			dev_err(&dev->dev,
1079 				"failed booting Motu MicroBook II: timeout\n");
1080 			err = -ENODEV;
1081 			goto free_buf;
1082 		}
1083 
1084 		memset(buf, 0, MICROBOOK_BUF_SIZE);
1085 		memcpy(buf, poll_ready_seq, sizeof(poll_ready_seq));
1086 
1087 		actual_length = sizeof(poll_ready_seq);
1088 		err = snd_usb_motu_microbookii_communicate(
1089 			dev, buf, MICROBOOK_BUF_SIZE, &actual_length);
1090 		if (err < 0) {
1091 			dev_err(&dev->dev,
1092 				"failed booting Motu MicroBook II: communication error %d\n",
1093 				err);
1094 			goto free_buf;
1095 		}
1096 
1097 		/* the device signals its readiness through a message of the
1098 		 * form
1099 		 *           XX 06 00 00 00 00 0b 18  00 00 00 01
1100 		 * If the device is not yet ready to accept audio data, the
1101 		 * last byte of that sequence is 00.
1102 		 */
1103 		if (actual_length == 12 && buf[actual_length - 1] == 1)
1104 			break;
1105 
1106 		msleep(100);
1107 	}
1108 
1109 	dev_info(&dev->dev, "MOTU MicroBook II ready\n");
1110 
1111 free_buf:
1112 	kfree(buf);
1113 	return err;
1114 }
1115 
1116 static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev)
1117 {
1118 	int ret;
1119 
1120 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
1121 		return -EINVAL;
1122 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1123 			      1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1124 			      0x0, 0, NULL, 0, 1000);
1125 
1126 	if (ret < 0)
1127 		return ret;
1128 
1129 	msleep(2000);
1130 
1131 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1132 			      1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1133 			      0x20, 0, NULL, 0, 1000);
1134 
1135 	if (ret < 0)
1136 		return ret;
1137 
1138 	return 0;
1139 }
1140 
1141 /*
1142  * Setup quirks
1143  */
1144 #define MAUDIO_SET		0x01 /* parse device_setup */
1145 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
1146 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
1147 #define MAUDIO_SET_96K		0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
1148 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
1149 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
1150 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
1151 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48KHz+Digital Input */
1152 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
1153 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48KHz+Digital Input */
1154 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */
1155 
1156 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
1157 				      int iface, int altno)
1158 {
1159 	/* Reset ALL ifaces to 0 altsetting.
1160 	 * Call it for every possible altsetting of every interface.
1161 	 */
1162 	usb_set_interface(chip->dev, iface, 0);
1163 	if (chip->setup & MAUDIO_SET) {
1164 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
1165 			if (iface != 1 && iface != 2)
1166 				return 1; /* skip all interfaces but 1 and 2 */
1167 		} else {
1168 			unsigned int mask;
1169 			if (iface == 1 || iface == 2)
1170 				return 1; /* skip interfaces 1 and 2 */
1171 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1172 				return 1; /* skip this altsetting */
1173 			mask = chip->setup & MAUDIO_SET_MASK;
1174 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1175 				return 1; /* skip this altsetting */
1176 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1177 				return 1; /* skip this altsetting */
1178 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
1179 				return 1; /* skip this altsetting */
1180 		}
1181 	}
1182 	usb_audio_dbg(chip,
1183 		    "using altsetting %d for interface %d config %d\n",
1184 		    altno, iface, chip->setup);
1185 	return 0; /* keep this altsetting */
1186 }
1187 
1188 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
1189 					 int iface,
1190 					 int altno)
1191 {
1192 	/* Reset ALL ifaces to 0 altsetting.
1193 	 * Call it for every possible altsetting of every interface.
1194 	 */
1195 	usb_set_interface(chip->dev, iface, 0);
1196 
1197 	if (chip->setup & MAUDIO_SET) {
1198 		unsigned int mask;
1199 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
1200 			return 1; /* skip this altsetting */
1201 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1202 			return 1; /* skip this altsetting */
1203 		mask = chip->setup & MAUDIO_SET_MASK;
1204 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1205 			return 1; /* skip this altsetting */
1206 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1207 			return 1; /* skip this altsetting */
1208 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
1209 			return 1; /* skip this altsetting */
1210 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
1211 			return 1; /* skip this altsetting */
1212 	}
1213 
1214 	return 0; /* keep this altsetting */
1215 }
1216 
1217 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
1218 					   int iface, int altno)
1219 {
1220 	/* Reset ALL ifaces to 0 altsetting.
1221 	 * Call it for every possible altsetting of every interface.
1222 	 */
1223 	usb_set_interface(chip->dev, iface, 0);
1224 
1225 	/* possible configuration where both inputs and only one output is
1226 	 *used is not supported by the current setup
1227 	 */
1228 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
1229 		if (chip->setup & MAUDIO_SET_96K) {
1230 			if (altno != 3 && altno != 6)
1231 				return 1;
1232 		} else if (chip->setup & MAUDIO_SET_DI) {
1233 			if (iface == 4)
1234 				return 1; /* no analog input */
1235 			if (altno != 2 && altno != 5)
1236 				return 1; /* enable only altsets 2 and 5 */
1237 		} else {
1238 			if (iface == 5)
1239 				return 1; /* disable digialt input */
1240 			if (altno != 2 && altno != 5)
1241 				return 1; /* enalbe only altsets 2 and 5 */
1242 		}
1243 	} else {
1244 		/* keep only 16-Bit mode */
1245 		if (altno != 1)
1246 			return 1;
1247 	}
1248 
1249 	usb_audio_dbg(chip,
1250 		    "using altsetting %d for interface %d config %d\n",
1251 		    altno, iface, chip->setup);
1252 	return 0; /* keep this altsetting */
1253 }
1254 
1255 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
1256 				  int iface,
1257 				  int altno)
1258 {
1259 	/* audiophile usb: skip altsets incompatible with device_setup */
1260 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
1261 		return audiophile_skip_setting_quirk(chip, iface, altno);
1262 	/* quattro usb: skip altsets incompatible with device_setup */
1263 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
1264 		return quattro_skip_setting_quirk(chip, iface, altno);
1265 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
1266 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
1267 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
1268 
1269 	return 0;
1270 }
1271 
1272 int snd_usb_apply_boot_quirk(struct usb_device *dev,
1273 			     struct usb_interface *intf,
1274 			     const struct snd_usb_audio_quirk *quirk,
1275 			     unsigned int id)
1276 {
1277 	switch (id) {
1278 	case USB_ID(0x041e, 0x3000):
1279 		/* SB Extigy needs special boot-up sequence */
1280 		/* if more models come, this will go to the quirk list. */
1281 		return snd_usb_extigy_boot_quirk(dev, intf);
1282 
1283 	case USB_ID(0x041e, 0x3020):
1284 		/* SB Audigy 2 NX needs its own boot-up magic, too */
1285 		return snd_usb_audigy2nx_boot_quirk(dev);
1286 
1287 	case USB_ID(0x10f5, 0x0200):
1288 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
1289 		return snd_usb_cm106_boot_quirk(dev);
1290 
1291 	case USB_ID(0x0d8c, 0x0102):
1292 		/* C-Media CM6206 / CM106-Like Sound Device */
1293 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
1294 		return snd_usb_cm6206_boot_quirk(dev);
1295 
1296 	case USB_ID(0x0dba, 0x3000):
1297 		/* Digidesign Mbox 2 */
1298 		return snd_usb_mbox2_boot_quirk(dev);
1299 
1300 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
1301 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
1302 		return snd_usb_novation_boot_quirk(dev);
1303 
1304 	case USB_ID(0x133e, 0x0815):
1305 		/* Access Music VirusTI Desktop */
1306 		return snd_usb_accessmusic_boot_quirk(dev);
1307 
1308 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1309 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1310 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1311 		return snd_usb_nativeinstruments_boot_quirk(dev);
1312 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1313 		return snd_usb_fasttrackpro_boot_quirk(dev);
1314 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1315 		return snd_usb_gamecon780_boot_quirk(dev);
1316 	case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx 3 */
1317 		return snd_usb_axefx3_boot_quirk(dev);
1318 	case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II */
1319 		return snd_usb_motu_microbookii_boot_quirk(dev);
1320 	}
1321 
1322 	return 0;
1323 }
1324 
1325 int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
1326 				  struct usb_interface *intf,
1327 				  const struct snd_usb_audio_quirk *quirk,
1328 				  unsigned int id)
1329 {
1330 	switch (id) {
1331 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
1332 		return snd_usb_motu_m_series_boot_quirk(dev);
1333 	}
1334 
1335 	return 0;
1336 }
1337 
1338 /*
1339  * check if the device uses big-endian samples
1340  */
1341 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1342 {
1343 	/* it depends on altsetting whether the device is big-endian or not */
1344 	switch (chip->usb_id) {
1345 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1346 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1347 			fp->altsetting == 5 || fp->altsetting == 6)
1348 			return 1;
1349 		break;
1350 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1351 		if (chip->setup == 0x00 ||
1352 			fp->altsetting == 1 || fp->altsetting == 2 ||
1353 			fp->altsetting == 3)
1354 			return 1;
1355 		break;
1356 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1357 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1358 			fp->altsetting == 5 || fp->altsetting == 6)
1359 			return 1;
1360 		break;
1361 	}
1362 	return 0;
1363 }
1364 
1365 /*
1366  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1367  * not for interface.
1368  */
1369 
1370 enum {
1371 	EMU_QUIRK_SR_44100HZ = 0,
1372 	EMU_QUIRK_SR_48000HZ,
1373 	EMU_QUIRK_SR_88200HZ,
1374 	EMU_QUIRK_SR_96000HZ,
1375 	EMU_QUIRK_SR_176400HZ,
1376 	EMU_QUIRK_SR_192000HZ
1377 };
1378 
1379 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1380 				 struct audioformat *fmt)
1381 {
1382 	unsigned char emu_samplerate_id = 0;
1383 
1384 	/* When capture is active
1385 	 * sample rate shouldn't be changed
1386 	 * by playback substream
1387 	 */
1388 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1389 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1390 			return;
1391 	}
1392 
1393 	switch (fmt->rate_min) {
1394 	case 48000:
1395 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1396 		break;
1397 	case 88200:
1398 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1399 		break;
1400 	case 96000:
1401 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1402 		break;
1403 	case 176400:
1404 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1405 		break;
1406 	case 192000:
1407 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1408 		break;
1409 	default:
1410 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1411 		break;
1412 	}
1413 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1414 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1415 }
1416 
1417 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1418 			      struct audioformat *fmt)
1419 {
1420 	switch (subs->stream->chip->usb_id) {
1421 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1422 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1423 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1424 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1425 		set_format_emu_quirk(subs, fmt);
1426 		break;
1427 	}
1428 }
1429 
1430 bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
1431 {
1432 	/* devices which do not support reading the sample rate. */
1433 	switch (chip->usb_id) {
1434 	case USB_ID(0x041e, 0x4080): /* Creative Live Cam VF0610 */
1435 	case USB_ID(0x04d8, 0xfeea): /* Benchmark DAC1 Pre */
1436 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
1437 	case USB_ID(0x05a3, 0x9420): /* ELP HD USB Camera */
1438 	case USB_ID(0x05a7, 0x1020): /* Bose Companion 5 */
1439 	case USB_ID(0x074d, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
1440 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
1441 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
1442 	case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
1443 	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
1444 		return true;
1445 	}
1446 
1447 	/* devices of these vendors don't support reading rate, either */
1448 	switch (USB_ID_VENDOR(chip->usb_id)) {
1449 	case 0x045e: /* MS Lifecam */
1450 	case 0x047f: /* Plantronics */
1451 	case 0x1de7: /* Phoenix Audio */
1452 		return true;
1453 	}
1454 
1455 	return false;
1456 }
1457 
1458 /* ITF-USB DSD based DACs need a vendor cmd to switch
1459  * between PCM and native DSD mode
1460  */
1461 static bool is_itf_usb_dsd_dac(unsigned int id)
1462 {
1463 	switch (id) {
1464 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
1465 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
1466 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
1467 	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
1468 	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
1469 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
1470 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
1471 		return true;
1472 	}
1473 	return false;
1474 }
1475 
1476 int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
1477 			      struct audioformat *fmt)
1478 {
1479 	struct usb_device *dev = subs->dev;
1480 	int err;
1481 
1482 	if (is_itf_usb_dsd_dac(subs->stream->chip->usb_id)) {
1483 		/* First switch to alt set 0, otherwise the mode switch cmd
1484 		 * will not be accepted by the DAC
1485 		 */
1486 		err = usb_set_interface(dev, fmt->iface, 0);
1487 		if (err < 0)
1488 			return err;
1489 
1490 		msleep(20); /* Delay needed after setting the interface */
1491 
1492 		/* Vendor mode switch cmd is required. */
1493 		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
1494 			/* DSD mode (DSD_U32) requested */
1495 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1496 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1497 					      1, 1, NULL, 0);
1498 			if (err < 0)
1499 				return err;
1500 
1501 		} else {
1502 			/* PCM or DOP mode (S32) requested */
1503 			/* PCM mode (S16) requested */
1504 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1505 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1506 					      0, 1, NULL, 0);
1507 			if (err < 0)
1508 				return err;
1509 
1510 		}
1511 		msleep(20);
1512 	}
1513 	return 0;
1514 }
1515 
1516 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1517 {
1518 	/*
1519 	 * "Playback Design" products send bogus feedback data at the start
1520 	 * of the stream. Ignore them.
1521 	 */
1522 	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
1523 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1524 		ep->skip_packets = 4;
1525 
1526 	/*
1527 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1528 	 * world latency varies by approx. +/- 50 frames (at 96KHz) each time
1529 	 * the stream is (re)started. When skipping packets 16 at endpoint
1530 	 * start up, the real world latency is stable within +/- 1 frame (also
1531 	 * across power cycles).
1532 	 */
1533 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1534 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1535 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1536 		ep->skip_packets = 16;
1537 
1538 	/* Work around devices that report unreasonable feedback data */
1539 	if ((ep->chip->usb_id == USB_ID(0x0644, 0x8038) ||  /* TEAC UD-H01 */
1540 	     ep->chip->usb_id == USB_ID(0x1852, 0x5034)) && /* T+A Dac8 */
1541 	    ep->syncmaxsize == 4)
1542 		ep->tenor_fb_quirk = 1;
1543 }
1544 
1545 void snd_usb_set_interface_quirk(struct usb_device *dev)
1546 {
1547 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1548 
1549 	if (!chip)
1550 		return;
1551 	/*
1552 	 * "Playback Design" products need a 50ms delay after setting the
1553 	 * USB interface.
1554 	 */
1555 	switch (USB_ID_VENDOR(chip->usb_id)) {
1556 	case 0x23ba: /* Playback Design */
1557 	case 0x0644: /* TEAC Corp. */
1558 		msleep(50);
1559 		break;
1560 	}
1561 }
1562 
1563 /* quirk applied after snd_usb_ctl_msg(); not applied during boot quirks */
1564 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1565 			   __u8 request, __u8 requesttype, __u16 value,
1566 			   __u16 index, void *data, __u16 size)
1567 {
1568 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1569 
1570 	if (!chip)
1571 		return;
1572 	/*
1573 	 * "Playback Design" products need a 20ms delay after each
1574 	 * class compliant request
1575 	 */
1576 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1577 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1578 		msleep(20);
1579 
1580 	/*
1581 	 * "TEAC Corp." products need a 20ms delay after each
1582 	 * class compliant request
1583 	 */
1584 	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
1585 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1586 		msleep(20);
1587 
1588 	/* ITF-USB DSD based DACs functionality need a delay
1589 	 * after each class compliant request
1590 	 */
1591 	if (is_itf_usb_dsd_dac(chip->usb_id)
1592 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1593 		msleep(20);
1594 
1595 	/* Zoom R16/24, Logitech H650e, Jabra 550a needs a tiny delay here,
1596 	 * otherwise requests like get/set frequency return as failed despite
1597 	 * actually succeeding.
1598 	 */
1599 	if ((chip->usb_id == USB_ID(0x1686, 0x00dd) ||
1600 	     chip->usb_id == USB_ID(0x046d, 0x0a46) ||
1601 	     chip->usb_id == USB_ID(0x0b0e, 0x0349)) &&
1602 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1603 		usleep_range(1000, 2000);
1604 }
1605 
1606 /*
1607  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1608  * augment the PCM format bit-field for DSD types. The UAC standards
1609  * don't have a designated bit field to denote DSD-capable interfaces,
1610  * hence all hardware that is known to support this format has to be
1611  * listed here.
1612  */
1613 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1614 					struct audioformat *fp,
1615 					unsigned int sample_bytes)
1616 {
1617 	struct usb_interface *iface;
1618 
1619 	/* Playback Designs */
1620 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1621 	    USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
1622 		switch (fp->altsetting) {
1623 		case 1:
1624 			fp->dsd_dop = true;
1625 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1626 		case 2:
1627 			fp->dsd_bitrev = true;
1628 			return SNDRV_PCM_FMTBIT_DSD_U8;
1629 		case 3:
1630 			fp->dsd_bitrev = true;
1631 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1632 		}
1633 	}
1634 
1635 	/* XMOS based USB DACs */
1636 	switch (chip->usb_id) {
1637 	case USB_ID(0x1511, 0x0037): /* AURALiC VEGA */
1638 	case USB_ID(0x2522, 0x0012): /* LH Labs VI DAC Infinity */
1639 	case USB_ID(0x2772, 0x0230): /* Pro-Ject Pre Box S2 Digital */
1640 		if (fp->altsetting == 2)
1641 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1642 		break;
1643 
1644 	case USB_ID(0x0d8c, 0x0316): /* Hegel HD12 DSD */
1645 	case USB_ID(0x10cb, 0x0103): /* The Bit Opus #3; with fp->dsd_raw */
1646 	case USB_ID(0x16b0, 0x06b2): /* NuPrime DAC-10 */
1647 	case USB_ID(0x16d0, 0x09dd): /* Encore mDSD */
1648 	case USB_ID(0x16d0, 0x0733): /* Furutech ADL Stratos */
1649 	case USB_ID(0x16d0, 0x09db): /* NuPrime Audio DAC-9 */
1650 	case USB_ID(0x1db5, 0x0003): /* Bryston BDA3 */
1651 	case USB_ID(0x22e1, 0xca01): /* HDTA Serenade DSD */
1652 	case USB_ID(0x249c, 0x9326): /* M2Tech Young MkIII */
1653 	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
1654 	case USB_ID(0x2622, 0x0041): /* Audiolab M-DAC+ */
1655 	case USB_ID(0x27f7, 0x3002): /* W4S DAC-2v2SE */
1656 	case USB_ID(0x29a2, 0x0086): /* Mutec MC3+ USB */
1657 	case USB_ID(0x6b42, 0x0042): /* MSB Technology */
1658 		if (fp->altsetting == 3)
1659 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1660 		break;
1661 
1662 	/* Amanero Combo384 USB based DACs with native DSD support */
1663 	case USB_ID(0x16d0, 0x071a):  /* Amanero - Combo384 */
1664 	case USB_ID(0x2ab6, 0x0004):  /* T+A DAC8DSD-V2.0, MP1000E-V2.0, MP2000R-V2.0, MP2500R-V2.0, MP3100HV-V2.0 */
1665 	case USB_ID(0x2ab6, 0x0005):  /* T+A USB HD Audio 1 */
1666 	case USB_ID(0x2ab6, 0x0006):  /* T+A USB HD Audio 2 */
1667 		if (fp->altsetting == 2) {
1668 			switch (le16_to_cpu(chip->dev->descriptor.bcdDevice)) {
1669 			case 0x199:
1670 				return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1671 			case 0x19b:
1672 			case 0x203:
1673 				return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1674 			default:
1675 				break;
1676 			}
1677 		}
1678 		break;
1679 	case USB_ID(0x16d0, 0x0a23):
1680 		if (fp->altsetting == 2)
1681 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1682 		break;
1683 
1684 	default:
1685 		break;
1686 	}
1687 
1688 	/* ITF-USB DSD based DACs */
1689 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1690 		iface = usb_ifnum_to_if(chip->dev, fp->iface);
1691 
1692 		/* Altsetting 2 support native DSD if the num of altsets is
1693 		 * three (0-2),
1694 		 * Altsetting 3 support native DSD if the num of altsets is
1695 		 * four (0-3).
1696 		 */
1697 		if (fp->altsetting == iface->num_altsetting - 1)
1698 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1699 	}
1700 
1701 	/* Mostly generic method to detect many DSD-capable implementations -
1702 	 * from XMOS/Thesycon
1703 	 */
1704 	switch (USB_ID_VENDOR(chip->usb_id)) {
1705 	case 0x152a:  /* Thesycon devices */
1706 	case 0x20b1:  /* XMOS based devices */
1707 	case 0x22d9:  /* Oppo */
1708 	case 0x23ba:  /* Playback Designs */
1709 	case 0x25ce:  /* Mytek devices */
1710 	case 0x278b:  /* Rotel? */
1711 	case 0x292b:  /* Gustard/Ess based devices */
1712 	case 0x2ab6:  /* T+A devices */
1713 	case 0x3842:  /* EVGA */
1714 	case 0xc502:  /* HiBy devices */
1715 		if (fp->dsd_raw)
1716 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1717 		break;
1718 	default:
1719 		break;
1720 
1721 	}
1722 
1723 	return 0;
1724 }
1725 
1726 void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
1727 					  struct audioformat *fp,
1728 					  int stream)
1729 {
1730 	switch (chip->usb_id) {
1731 	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1732 		/* Optoplay sets the sample rate attribute although
1733 		 * it seems not supporting it in fact.
1734 		 */
1735 		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
1736 		break;
1737 	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
1738 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1739 		/* doesn't set the sample rate attribute, but supports it */
1740 		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
1741 		break;
1742 	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
1743 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1744 	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
1745 	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
1746 					an older model 77d:223) */
1747 	/*
1748 	 * plantronics headset and Griffin iMic have set adaptive-in
1749 	 * although it's really not...
1750 	 */
1751 		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
1752 		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1753 			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
1754 		else
1755 			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
1756 		break;
1757 	}
1758 }
1759