xref: /openbmc/linux/sound/usb/quirks.c (revision fb8d6c8d)
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  * audio-interface quirks
513  *
514  * returns zero if no standard audio/MIDI parsing is needed.
515  * returns a positive value if standard audio/midi interfaces are parsed
516  * after this.
517  * returns a negative value at error.
518  */
519 int snd_usb_create_quirk(struct snd_usb_audio *chip,
520 			 struct usb_interface *iface,
521 			 struct usb_driver *driver,
522 			 const struct snd_usb_audio_quirk *quirk)
523 {
524 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
525 				    struct usb_interface *,
526 				    struct usb_driver *,
527 				    const struct snd_usb_audio_quirk *);
528 	static const quirk_func_t quirk_funcs[] = {
529 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
530 		[QUIRK_COMPOSITE] = create_composite_quirk,
531 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
532 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
533 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
534 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
535 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
536 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
537 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
538 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
539 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
540 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
541 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
542 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
543 		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
544 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
545 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
546 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
547 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
548 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
549 	};
550 
551 	if (quirk->type < QUIRK_TYPE_COUNT) {
552 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
553 	} else {
554 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
555 		return -ENXIO;
556 	}
557 }
558 
559 /*
560  * boot quirks
561  */
562 
563 #define EXTIGY_FIRMWARE_SIZE_OLD 794
564 #define EXTIGY_FIRMWARE_SIZE_NEW 483
565 
566 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
567 {
568 	struct usb_host_config *config = dev->actconfig;
569 	int err;
570 
571 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
572 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
573 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
574 		/* Send message to force it to reconnect with full interface. */
575 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
576 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
577 		if (err < 0)
578 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
579 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
580 				&dev->descriptor, sizeof(dev->descriptor));
581 		config = dev->actconfig;
582 		if (err < 0)
583 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
584 		err = usb_reset_configuration(dev);
585 		if (err < 0)
586 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
587 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
588 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
589 		return -ENODEV; /* quit this anyway */
590 	}
591 	return 0;
592 }
593 
594 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
595 {
596 	u8 buf = 1;
597 
598 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
599 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
600 			0, 0, &buf, 1);
601 	if (buf == 0) {
602 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
603 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
604 				1, 2000, NULL, 0);
605 		return -ENODEV;
606 	}
607 	return 0;
608 }
609 
610 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
611 {
612 	int err;
613 
614 	if (dev->actconfig->desc.bConfigurationValue == 1) {
615 		dev_info(&dev->dev,
616 			   "Fast Track Pro switching to config #2\n");
617 		/* This function has to be available by the usb core module.
618 		 * if it is not avialable the boot quirk has to be left out
619 		 * and the configuration has to be set by udev or hotplug
620 		 * rules
621 		 */
622 		err = usb_driver_set_configuration(dev, 2);
623 		if (err < 0)
624 			dev_dbg(&dev->dev,
625 				"error usb_driver_set_configuration: %d\n",
626 				err);
627 		/* Always return an error, so that we stop creating a device
628 		   that will just be destroyed and recreated with a new
629 		   configuration */
630 		return -ENODEV;
631 	} else
632 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
633 
634 	return 0;
635 }
636 
637 /*
638  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
639  * documented in the device's data sheet.
640  */
641 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
642 {
643 	u8 buf[4];
644 	buf[0] = 0x20;
645 	buf[1] = value & 0xff;
646 	buf[2] = (value >> 8) & 0xff;
647 	buf[3] = reg;
648 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
649 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
650 			       0, 0, &buf, 4);
651 }
652 
653 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
654 {
655 	/*
656 	 * Enable line-out driver mode, set headphone source to front
657 	 * channels, enable stereo mic.
658 	 */
659 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
660 }
661 
662 /*
663  * CM6206 registers from the CM6206 datasheet rev 2.1
664  */
665 #define CM6206_REG0_DMA_MASTER BIT(15)
666 #define CM6206_REG0_SPDIFO_RATE_48K (2 << 12)
667 #define CM6206_REG0_SPDIFO_RATE_96K (7 << 12)
668 /* Bit 4 thru 11 is the S/PDIF category code */
669 #define CM6206_REG0_SPDIFO_CAT_CODE_GENERAL (0 << 4)
670 #define CM6206_REG0_SPDIFO_EMPHASIS_CD BIT(3)
671 #define CM6206_REG0_SPDIFO_COPYRIGHT_NA BIT(2)
672 #define CM6206_REG0_SPDIFO_NON_AUDIO BIT(1)
673 #define CM6206_REG0_SPDIFO_PRO_FORMAT BIT(0)
674 
675 #define CM6206_REG1_TEST_SEL_CLK BIT(14)
676 #define CM6206_REG1_PLLBIN_EN BIT(13)
677 #define CM6206_REG1_SOFT_MUTE_EN BIT(12)
678 #define CM6206_REG1_GPIO4_OUT BIT(11)
679 #define CM6206_REG1_GPIO4_OE BIT(10)
680 #define CM6206_REG1_GPIO3_OUT BIT(9)
681 #define CM6206_REG1_GPIO3_OE BIT(8)
682 #define CM6206_REG1_GPIO2_OUT BIT(7)
683 #define CM6206_REG1_GPIO2_OE BIT(6)
684 #define CM6206_REG1_GPIO1_OUT BIT(5)
685 #define CM6206_REG1_GPIO1_OE BIT(4)
686 #define CM6206_REG1_SPDIFO_INVALID BIT(3)
687 #define CM6206_REG1_SPDIF_LOOP_EN BIT(2)
688 #define CM6206_REG1_SPDIFO_DIS BIT(1)
689 #define CM6206_REG1_SPDIFI_MIX BIT(0)
690 
691 #define CM6206_REG2_DRIVER_ON BIT(15)
692 #define CM6206_REG2_HEADP_SEL_SIDE_CHANNELS (0 << 13)
693 #define CM6206_REG2_HEADP_SEL_SURROUND_CHANNELS (1 << 13)
694 #define CM6206_REG2_HEADP_SEL_CENTER_SUBW (2 << 13)
695 #define CM6206_REG2_HEADP_SEL_FRONT_CHANNELS (3 << 13)
696 #define CM6206_REG2_MUTE_HEADPHONE_RIGHT BIT(12)
697 #define CM6206_REG2_MUTE_HEADPHONE_LEFT BIT(11)
698 #define CM6206_REG2_MUTE_REAR_SURROUND_RIGHT BIT(10)
699 #define CM6206_REG2_MUTE_REAR_SURROUND_LEFT BIT(9)
700 #define CM6206_REG2_MUTE_SIDE_SURROUND_RIGHT BIT(8)
701 #define CM6206_REG2_MUTE_SIDE_SURROUND_LEFT BIT(7)
702 #define CM6206_REG2_MUTE_SUBWOOFER BIT(6)
703 #define CM6206_REG2_MUTE_CENTER BIT(5)
704 #define CM6206_REG2_MUTE_RIGHT_FRONT BIT(3)
705 #define CM6206_REG2_MUTE_LEFT_FRONT BIT(3)
706 #define CM6206_REG2_EN_BTL BIT(2)
707 #define CM6206_REG2_MCUCLKSEL_1_5_MHZ (0)
708 #define CM6206_REG2_MCUCLKSEL_3_MHZ (1)
709 #define CM6206_REG2_MCUCLKSEL_6_MHZ (2)
710 #define CM6206_REG2_MCUCLKSEL_12_MHZ (3)
711 
712 /* Bit 11..13 sets the sensitivity to FLY tuner volume control VP/VD signal */
713 #define CM6206_REG3_FLYSPEED_DEFAULT (2 << 11)
714 #define CM6206_REG3_VRAP25EN BIT(10)
715 #define CM6206_REG3_MSEL1 BIT(9)
716 #define CM6206_REG3_SPDIFI_RATE_44_1K BIT(0 << 7)
717 #define CM6206_REG3_SPDIFI_RATE_48K BIT(2 << 7)
718 #define CM6206_REG3_SPDIFI_RATE_32K BIT(3 << 7)
719 #define CM6206_REG3_PINSEL BIT(6)
720 #define CM6206_REG3_FOE BIT(5)
721 #define CM6206_REG3_ROE BIT(4)
722 #define CM6206_REG3_CBOE BIT(3)
723 #define CM6206_REG3_LOSE BIT(2)
724 #define CM6206_REG3_HPOE BIT(1)
725 #define CM6206_REG3_SPDIFI_CANREC BIT(0)
726 
727 #define CM6206_REG5_DA_RSTN BIT(13)
728 #define CM6206_REG5_AD_RSTN BIT(12)
729 #define CM6206_REG5_SPDIFO_AD2SPDO BIT(12)
730 #define CM6206_REG5_SPDIFO_SEL_FRONT (0 << 9)
731 #define CM6206_REG5_SPDIFO_SEL_SIDE_SUR (1 << 9)
732 #define CM6206_REG5_SPDIFO_SEL_CEN_LFE (2 << 9)
733 #define CM6206_REG5_SPDIFO_SEL_REAR_SUR (3 << 9)
734 #define CM6206_REG5_CODECM BIT(8)
735 #define CM6206_REG5_EN_HPF BIT(7)
736 #define CM6206_REG5_T_SEL_DSDA4 BIT(6)
737 #define CM6206_REG5_T_SEL_DSDA3 BIT(5)
738 #define CM6206_REG5_T_SEL_DSDA2 BIT(4)
739 #define CM6206_REG5_T_SEL_DSDA1 BIT(3)
740 #define CM6206_REG5_T_SEL_DSDAD_NORMAL 0
741 #define CM6206_REG5_T_SEL_DSDAD_FRONT 4
742 #define CM6206_REG5_T_SEL_DSDAD_S_SURROUND 5
743 #define CM6206_REG5_T_SEL_DSDAD_CEN_LFE 6
744 #define CM6206_REG5_T_SEL_DSDAD_R_SURROUND 7
745 
746 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
747 {
748 	int err  = 0, reg;
749 	int val[] = {
750 		/*
751 		 * Values here are chosen based on sniffing USB traffic
752 		 * under Windows.
753 		 *
754 		 * REG0: DAC is master, sample rate 48kHz, no copyright
755 		 */
756 		CM6206_REG0_SPDIFO_RATE_48K |
757 		CM6206_REG0_SPDIFO_COPYRIGHT_NA,
758 		/*
759 		 * REG1: PLL binary search enable, soft mute enable.
760 		 */
761 		CM6206_REG1_PLLBIN_EN |
762 		CM6206_REG1_SOFT_MUTE_EN,
763 		/*
764 		 * REG2: enable output drivers,
765 		 * select front channels to the headphone output,
766 		 * then mute the headphone channels, run the MCU
767 		 * at 1.5 MHz.
768 		 */
769 		CM6206_REG2_DRIVER_ON |
770 		CM6206_REG2_HEADP_SEL_FRONT_CHANNELS |
771 		CM6206_REG2_MUTE_HEADPHONE_RIGHT |
772 		CM6206_REG2_MUTE_HEADPHONE_LEFT,
773 		/*
774 		 * REG3: default flyspeed, set 2.5V mic bias
775 		 * enable all line out ports and enable SPDIF
776 		 */
777 		CM6206_REG3_FLYSPEED_DEFAULT |
778 		CM6206_REG3_VRAP25EN |
779 		CM6206_REG3_FOE |
780 		CM6206_REG3_ROE |
781 		CM6206_REG3_CBOE |
782 		CM6206_REG3_LOSE |
783 		CM6206_REG3_HPOE |
784 		CM6206_REG3_SPDIFI_CANREC,
785 		/* REG4 is just a bunch of GPIO lines */
786 		0x0000,
787 		/* REG5: de-assert AD/DA reset signals */
788 		CM6206_REG5_DA_RSTN |
789 		CM6206_REG5_AD_RSTN };
790 
791 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
792 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
793 		if (err < 0)
794 			return err;
795 	}
796 
797 	return err;
798 }
799 
800 /* quirk for Plantronics GameCom 780 with CM6302 chip */
801 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
802 {
803 	/* set the initial volume and don't change; other values are either
804 	 * too loud or silent due to firmware bug (bko#65251)
805 	 */
806 	u8 buf[2] = { 0x74, 0xe3 };
807 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
808 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
809 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
810 }
811 
812 /*
813  * Novation Twitch DJ controller
814  * Focusrite Novation Saffire 6 USB audio card
815  */
816 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
817 {
818 	/* preemptively set up the device because otherwise the
819 	 * raw MIDI endpoints are not active */
820 	usb_set_interface(dev, 0, 1);
821 	return 0;
822 }
823 
824 /*
825  * This call will put the synth in "USB send" mode, i.e it will send MIDI
826  * messages through USB (this is disabled at startup). The synth will
827  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
828  * sign on its LCD. Values here are chosen based on sniffing USB traffic
829  * under Windows.
830  */
831 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
832 {
833 	int err, actual_length;
834 	/* "midi send" enable */
835 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
836 	void *buf;
837 
838 	if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x05)))
839 		return -EINVAL;
840 	buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
841 	if (!buf)
842 		return -ENOMEM;
843 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
844 			ARRAY_SIZE(seq), &actual_length, 1000);
845 	kfree(buf);
846 	if (err < 0)
847 		return err;
848 
849 	return 0;
850 }
851 
852 /*
853  * Some sound cards from Native Instruments are in fact compliant to the USB
854  * audio standard of version 2 and other approved USB standards, even though
855  * they come up as vendor-specific device when first connected.
856  *
857  * However, they can be told to come up with a new set of descriptors
858  * upon their next enumeration, and the interfaces announced by the new
859  * descriptors will then be handled by the kernel's class drivers. As the
860  * product ID will also change, no further checks are required.
861  */
862 
863 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
864 {
865 	int ret;
866 
867 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
868 		return -EINVAL;
869 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
870 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
871 				  1, 0, NULL, 0, 1000);
872 
873 	if (ret < 0)
874 		return ret;
875 
876 	usb_reset_device(dev);
877 
878 	/* return -EAGAIN, so the creation of an audio interface for this
879 	 * temporary device is aborted. The device will reconnect with a
880 	 * new product ID */
881 	return -EAGAIN;
882 }
883 
884 static void mbox2_setup_48_24_magic(struct usb_device *dev)
885 {
886 	u8 srate[3];
887 	u8 temp[12];
888 
889 	/* Choose 48000Hz permanently */
890 	srate[0] = 0x80;
891 	srate[1] = 0xbb;
892 	srate[2] = 0x00;
893 
894 	/* Send the magic! */
895 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
896 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
897 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
898 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
899 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
900 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
901 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
902 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
903 	return;
904 }
905 
906 /* Digidesign Mbox 2 needs to load firmware onboard
907  * and driver must wait a few seconds for initialisation.
908  */
909 
910 #define MBOX2_FIRMWARE_SIZE    646
911 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
912 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
913 
914 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
915 {
916 	struct usb_host_config *config = dev->actconfig;
917 	int err;
918 	u8 bootresponse[0x12];
919 	int fwsize;
920 	int count;
921 
922 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
923 
924 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
925 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
926 		return -ENODEV;
927 	}
928 
929 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
930 
931 	count = 0;
932 	bootresponse[0] = MBOX2_BOOT_LOADING;
933 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
934 		msleep(500); /* 0.5 second delay */
935 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
936 			/* Control magic - load onboard firmware */
937 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
938 		if (bootresponse[0] == MBOX2_BOOT_READY)
939 			break;
940 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
941 		count++;
942 	}
943 
944 	if (bootresponse[0] != MBOX2_BOOT_READY) {
945 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
946 		return -ENODEV;
947 	}
948 
949 	dev_dbg(&dev->dev, "device initialised!\n");
950 
951 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
952 		&dev->descriptor, sizeof(dev->descriptor));
953 	config = dev->actconfig;
954 	if (err < 0)
955 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
956 
957 	err = usb_reset_configuration(dev);
958 	if (err < 0)
959 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
960 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
961 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
962 
963 	mbox2_setup_48_24_magic(dev);
964 
965 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
966 
967 	return 0; /* Successful boot */
968 }
969 
970 static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
971 {
972 	int err;
973 
974 	dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
975 
976 	if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
977 		return -EINVAL;
978 	/* If the Axe-Fx III has not fully booted, it will timeout when trying
979 	 * to enable the audio streaming interface. A more generous timeout is
980 	 * used here to detect when the Axe-Fx III has finished booting as the
981 	 * set interface message will be acked once it has
982 	 */
983 	err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
984 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
985 				1, 1, NULL, 0, 120000);
986 	if (err < 0) {
987 		dev_err(&dev->dev,
988 			"failed waiting for Axe-Fx III to boot: %d\n", err);
989 		return err;
990 	}
991 
992 	dev_dbg(&dev->dev, "Axe-Fx III is now ready\n");
993 
994 	err = usb_set_interface(dev, 1, 0);
995 	if (err < 0)
996 		dev_dbg(&dev->dev,
997 			"error stopping Axe-Fx III interface: %d\n", err);
998 
999 	return 0;
1000 }
1001 
1002 
1003 #define MICROBOOK_BUF_SIZE 128
1004 
1005 static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
1006 						int buf_size, int *length)
1007 {
1008 	int err, actual_length;
1009 
1010 	if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x01)))
1011 		return -EINVAL;
1012 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x01), buf, *length,
1013 				&actual_length, 1000);
1014 	if (err < 0)
1015 		return err;
1016 
1017 	print_hex_dump(KERN_DEBUG, "MicroBookII snd: ", DUMP_PREFIX_NONE, 16, 1,
1018 		       buf, actual_length, false);
1019 
1020 	memset(buf, 0, buf_size);
1021 
1022 	if (snd_usb_pipe_sanity_check(dev, usb_rcvintpipe(dev, 0x82)))
1023 		return -EINVAL;
1024 	err = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 0x82), buf, buf_size,
1025 				&actual_length, 1000);
1026 	if (err < 0)
1027 		return err;
1028 
1029 	print_hex_dump(KERN_DEBUG, "MicroBookII rcv: ", DUMP_PREFIX_NONE, 16, 1,
1030 		       buf, actual_length, false);
1031 
1032 	*length = actual_length;
1033 	return 0;
1034 }
1035 
1036 static int snd_usb_motu_microbookii_boot_quirk(struct usb_device *dev)
1037 {
1038 	int err, actual_length, poll_attempts = 0;
1039 	static const u8 set_samplerate_seq[] = { 0x00, 0x00, 0x00, 0x00,
1040 						 0x00, 0x00, 0x0b, 0x14,
1041 						 0x00, 0x00, 0x00, 0x01 };
1042 	static const u8 poll_ready_seq[] = { 0x00, 0x04, 0x00, 0x00,
1043 					     0x00, 0x00, 0x0b, 0x18 };
1044 	u8 *buf = kzalloc(MICROBOOK_BUF_SIZE, GFP_KERNEL);
1045 
1046 	if (!buf)
1047 		return -ENOMEM;
1048 
1049 	dev_info(&dev->dev, "Waiting for MOTU Microbook II to boot up...\n");
1050 
1051 	/* First we tell the device which sample rate to use. */
1052 	memcpy(buf, set_samplerate_seq, sizeof(set_samplerate_seq));
1053 	actual_length = sizeof(set_samplerate_seq);
1054 	err = snd_usb_motu_microbookii_communicate(dev, buf, MICROBOOK_BUF_SIZE,
1055 						   &actual_length);
1056 
1057 	if (err < 0) {
1058 		dev_err(&dev->dev,
1059 			"failed setting the sample rate for Motu MicroBook II: %d\n",
1060 			err);
1061 		goto free_buf;
1062 	}
1063 
1064 	/* Then we poll every 100 ms until the device informs of its readiness. */
1065 	while (true) {
1066 		if (++poll_attempts > 100) {
1067 			dev_err(&dev->dev,
1068 				"failed booting Motu MicroBook II: timeout\n");
1069 			err = -ENODEV;
1070 			goto free_buf;
1071 		}
1072 
1073 		memset(buf, 0, MICROBOOK_BUF_SIZE);
1074 		memcpy(buf, poll_ready_seq, sizeof(poll_ready_seq));
1075 
1076 		actual_length = sizeof(poll_ready_seq);
1077 		err = snd_usb_motu_microbookii_communicate(
1078 			dev, buf, MICROBOOK_BUF_SIZE, &actual_length);
1079 		if (err < 0) {
1080 			dev_err(&dev->dev,
1081 				"failed booting Motu MicroBook II: communication error %d\n",
1082 				err);
1083 			goto free_buf;
1084 		}
1085 
1086 		/* the device signals its readiness through a message of the
1087 		 * form
1088 		 *           XX 06 00 00 00 00 0b 18  00 00 00 01
1089 		 * If the device is not yet ready to accept audio data, the
1090 		 * last byte of that sequence is 00.
1091 		 */
1092 		if (actual_length == 12 && buf[actual_length - 1] == 1)
1093 			break;
1094 
1095 		msleep(100);
1096 	}
1097 
1098 	dev_info(&dev->dev, "MOTU MicroBook II ready\n");
1099 
1100 free_buf:
1101 	kfree(buf);
1102 	return err;
1103 }
1104 
1105 /*
1106  * Setup quirks
1107  */
1108 #define MAUDIO_SET		0x01 /* parse device_setup */
1109 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
1110 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
1111 #define MAUDIO_SET_96K		0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
1112 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
1113 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
1114 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
1115 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48KHz+Digital Input */
1116 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
1117 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48KHz+Digital Input */
1118 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */
1119 
1120 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
1121 				      int iface, int altno)
1122 {
1123 	/* Reset ALL ifaces to 0 altsetting.
1124 	 * Call it for every possible altsetting of every interface.
1125 	 */
1126 	usb_set_interface(chip->dev, iface, 0);
1127 	if (chip->setup & MAUDIO_SET) {
1128 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
1129 			if (iface != 1 && iface != 2)
1130 				return 1; /* skip all interfaces but 1 and 2 */
1131 		} else {
1132 			unsigned int mask;
1133 			if (iface == 1 || iface == 2)
1134 				return 1; /* skip interfaces 1 and 2 */
1135 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1136 				return 1; /* skip this altsetting */
1137 			mask = chip->setup & MAUDIO_SET_MASK;
1138 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1139 				return 1; /* skip this altsetting */
1140 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1141 				return 1; /* skip this altsetting */
1142 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
1143 				return 1; /* skip this altsetting */
1144 		}
1145 	}
1146 	usb_audio_dbg(chip,
1147 		    "using altsetting %d for interface %d config %d\n",
1148 		    altno, iface, chip->setup);
1149 	return 0; /* keep this altsetting */
1150 }
1151 
1152 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
1153 					 int iface,
1154 					 int altno)
1155 {
1156 	/* Reset ALL ifaces to 0 altsetting.
1157 	 * Call it for every possible altsetting of every interface.
1158 	 */
1159 	usb_set_interface(chip->dev, iface, 0);
1160 
1161 	if (chip->setup & MAUDIO_SET) {
1162 		unsigned int mask;
1163 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
1164 			return 1; /* skip this altsetting */
1165 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1166 			return 1; /* skip this altsetting */
1167 		mask = chip->setup & MAUDIO_SET_MASK;
1168 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1169 			return 1; /* skip this altsetting */
1170 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1171 			return 1; /* skip this altsetting */
1172 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
1173 			return 1; /* skip this altsetting */
1174 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
1175 			return 1; /* skip this altsetting */
1176 	}
1177 
1178 	return 0; /* keep this altsetting */
1179 }
1180 
1181 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
1182 					   int iface, int altno)
1183 {
1184 	/* Reset ALL ifaces to 0 altsetting.
1185 	 * Call it for every possible altsetting of every interface.
1186 	 */
1187 	usb_set_interface(chip->dev, iface, 0);
1188 
1189 	/* possible configuration where both inputs and only one output is
1190 	 *used is not supported by the current setup
1191 	 */
1192 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
1193 		if (chip->setup & MAUDIO_SET_96K) {
1194 			if (altno != 3 && altno != 6)
1195 				return 1;
1196 		} else if (chip->setup & MAUDIO_SET_DI) {
1197 			if (iface == 4)
1198 				return 1; /* no analog input */
1199 			if (altno != 2 && altno != 5)
1200 				return 1; /* enable only altsets 2 and 5 */
1201 		} else {
1202 			if (iface == 5)
1203 				return 1; /* disable digialt input */
1204 			if (altno != 2 && altno != 5)
1205 				return 1; /* enalbe only altsets 2 and 5 */
1206 		}
1207 	} else {
1208 		/* keep only 16-Bit mode */
1209 		if (altno != 1)
1210 			return 1;
1211 	}
1212 
1213 	usb_audio_dbg(chip,
1214 		    "using altsetting %d for interface %d config %d\n",
1215 		    altno, iface, chip->setup);
1216 	return 0; /* keep this altsetting */
1217 }
1218 
1219 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
1220 				  int iface,
1221 				  int altno)
1222 {
1223 	/* audiophile usb: skip altsets incompatible with device_setup */
1224 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
1225 		return audiophile_skip_setting_quirk(chip, iface, altno);
1226 	/* quattro usb: skip altsets incompatible with device_setup */
1227 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
1228 		return quattro_skip_setting_quirk(chip, iface, altno);
1229 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
1230 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
1231 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
1232 
1233 	return 0;
1234 }
1235 
1236 int snd_usb_apply_boot_quirk(struct usb_device *dev,
1237 			     struct usb_interface *intf,
1238 			     const struct snd_usb_audio_quirk *quirk,
1239 			     unsigned int id)
1240 {
1241 	switch (id) {
1242 	case USB_ID(0x041e, 0x3000):
1243 		/* SB Extigy needs special boot-up sequence */
1244 		/* if more models come, this will go to the quirk list. */
1245 		return snd_usb_extigy_boot_quirk(dev, intf);
1246 
1247 	case USB_ID(0x041e, 0x3020):
1248 		/* SB Audigy 2 NX needs its own boot-up magic, too */
1249 		return snd_usb_audigy2nx_boot_quirk(dev);
1250 
1251 	case USB_ID(0x10f5, 0x0200):
1252 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
1253 		return snd_usb_cm106_boot_quirk(dev);
1254 
1255 	case USB_ID(0x0d8c, 0x0102):
1256 		/* C-Media CM6206 / CM106-Like Sound Device */
1257 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
1258 		return snd_usb_cm6206_boot_quirk(dev);
1259 
1260 	case USB_ID(0x0dba, 0x3000):
1261 		/* Digidesign Mbox 2 */
1262 		return snd_usb_mbox2_boot_quirk(dev);
1263 
1264 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
1265 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
1266 		return snd_usb_novation_boot_quirk(dev);
1267 
1268 	case USB_ID(0x133e, 0x0815):
1269 		/* Access Music VirusTI Desktop */
1270 		return snd_usb_accessmusic_boot_quirk(dev);
1271 
1272 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1273 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1274 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1275 		return snd_usb_nativeinstruments_boot_quirk(dev);
1276 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1277 		return snd_usb_fasttrackpro_boot_quirk(dev);
1278 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1279 		return snd_usb_gamecon780_boot_quirk(dev);
1280 	case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx 3 */
1281 		return snd_usb_axefx3_boot_quirk(dev);
1282 	case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II */
1283 		return snd_usb_motu_microbookii_boot_quirk(dev);
1284 	}
1285 
1286 	return 0;
1287 }
1288 
1289 /*
1290  * check if the device uses big-endian samples
1291  */
1292 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1293 {
1294 	/* it depends on altsetting whether the device is big-endian or not */
1295 	switch (chip->usb_id) {
1296 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1297 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1298 			fp->altsetting == 5 || fp->altsetting == 6)
1299 			return 1;
1300 		break;
1301 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1302 		if (chip->setup == 0x00 ||
1303 			fp->altsetting == 1 || fp->altsetting == 2 ||
1304 			fp->altsetting == 3)
1305 			return 1;
1306 		break;
1307 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1308 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1309 			fp->altsetting == 5 || fp->altsetting == 6)
1310 			return 1;
1311 		break;
1312 	}
1313 	return 0;
1314 }
1315 
1316 /*
1317  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1318  * not for interface.
1319  */
1320 
1321 enum {
1322 	EMU_QUIRK_SR_44100HZ = 0,
1323 	EMU_QUIRK_SR_48000HZ,
1324 	EMU_QUIRK_SR_88200HZ,
1325 	EMU_QUIRK_SR_96000HZ,
1326 	EMU_QUIRK_SR_176400HZ,
1327 	EMU_QUIRK_SR_192000HZ
1328 };
1329 
1330 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1331 				 struct audioformat *fmt)
1332 {
1333 	unsigned char emu_samplerate_id = 0;
1334 
1335 	/* When capture is active
1336 	 * sample rate shouldn't be changed
1337 	 * by playback substream
1338 	 */
1339 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1340 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1341 			return;
1342 	}
1343 
1344 	switch (fmt->rate_min) {
1345 	case 48000:
1346 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1347 		break;
1348 	case 88200:
1349 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1350 		break;
1351 	case 96000:
1352 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1353 		break;
1354 	case 176400:
1355 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1356 		break;
1357 	case 192000:
1358 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1359 		break;
1360 	default:
1361 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1362 		break;
1363 	}
1364 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1365 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1366 }
1367 
1368 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1369 			      struct audioformat *fmt)
1370 {
1371 	switch (subs->stream->chip->usb_id) {
1372 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1373 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1374 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1375 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1376 		set_format_emu_quirk(subs, fmt);
1377 		break;
1378 	}
1379 }
1380 
1381 bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
1382 {
1383 	/* devices which do not support reading the sample rate. */
1384 	switch (chip->usb_id) {
1385 	case USB_ID(0x041E, 0x4080): /* Creative Live Cam VF0610 */
1386 	case USB_ID(0x04D8, 0xFEEA): /* Benchmark DAC1 Pre */
1387 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
1388 	case USB_ID(0x05A3, 0x9420): /* ELP HD USB Camera */
1389 	case USB_ID(0x074D, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
1390 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
1391 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
1392 	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
1393 		return true;
1394 	}
1395 
1396 	/* devices of these vendors don't support reading rate, either */
1397 	switch (USB_ID_VENDOR(chip->usb_id)) {
1398 	case 0x045E: /* MS Lifecam */
1399 	case 0x047F: /* Plantronics */
1400 	case 0x1de7: /* Phoenix Audio */
1401 		return true;
1402 	}
1403 
1404 	return false;
1405 }
1406 
1407 /* ITF-USB DSD based DACs need a vendor cmd to switch
1408  * between PCM and native DSD mode
1409  */
1410 static bool is_itf_usb_dsd_dac(unsigned int id)
1411 {
1412 	switch (id) {
1413 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
1414 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
1415 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
1416 	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
1417 	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
1418 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
1419 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
1420 		return true;
1421 	}
1422 	return false;
1423 }
1424 
1425 int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
1426 			      struct audioformat *fmt)
1427 {
1428 	struct usb_device *dev = subs->dev;
1429 	int err;
1430 
1431 	if (is_itf_usb_dsd_dac(subs->stream->chip->usb_id)) {
1432 		/* First switch to alt set 0, otherwise the mode switch cmd
1433 		 * will not be accepted by the DAC
1434 		 */
1435 		err = usb_set_interface(dev, fmt->iface, 0);
1436 		if (err < 0)
1437 			return err;
1438 
1439 		msleep(20); /* Delay needed after setting the interface */
1440 
1441 		/* Vendor mode switch cmd is required. */
1442 		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
1443 			/* DSD mode (DSD_U32) requested */
1444 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1445 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1446 					      1, 1, NULL, 0);
1447 			if (err < 0)
1448 				return err;
1449 
1450 		} else {
1451 			/* PCM or DOP mode (S32) requested */
1452 			/* PCM mode (S16) requested */
1453 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1454 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1455 					      0, 1, NULL, 0);
1456 			if (err < 0)
1457 				return err;
1458 
1459 		}
1460 		msleep(20);
1461 	}
1462 	return 0;
1463 }
1464 
1465 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1466 {
1467 	/*
1468 	 * "Playback Design" products send bogus feedback data at the start
1469 	 * of the stream. Ignore them.
1470 	 */
1471 	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
1472 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1473 		ep->skip_packets = 4;
1474 
1475 	/*
1476 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1477 	 * world latency varies by approx. +/- 50 frames (at 96KHz) each time
1478 	 * the stream is (re)started. When skipping packets 16 at endpoint
1479 	 * start up, the real world latency is stable within +/- 1 frame (also
1480 	 * across power cycles).
1481 	 */
1482 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1483 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1484 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1485 		ep->skip_packets = 16;
1486 
1487 	/* Work around devices that report unreasonable feedback data */
1488 	if ((ep->chip->usb_id == USB_ID(0x0644, 0x8038) ||  /* TEAC UD-H01 */
1489 	     ep->chip->usb_id == USB_ID(0x1852, 0x5034)) && /* T+A Dac8 */
1490 	    ep->syncmaxsize == 4)
1491 		ep->tenor_fb_quirk = 1;
1492 }
1493 
1494 void snd_usb_set_interface_quirk(struct usb_device *dev)
1495 {
1496 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1497 
1498 	if (!chip)
1499 		return;
1500 	/*
1501 	 * "Playback Design" products need a 50ms delay after setting the
1502 	 * USB interface.
1503 	 */
1504 	switch (USB_ID_VENDOR(chip->usb_id)) {
1505 	case 0x23ba: /* Playback Design */
1506 	case 0x0644: /* TEAC Corp. */
1507 		msleep(50);
1508 		break;
1509 	}
1510 }
1511 
1512 /* quirk applied after snd_usb_ctl_msg(); not applied during boot quirks */
1513 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1514 			   __u8 request, __u8 requesttype, __u16 value,
1515 			   __u16 index, void *data, __u16 size)
1516 {
1517 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1518 
1519 	if (!chip)
1520 		return;
1521 	/*
1522 	 * "Playback Design" products need a 20ms delay after each
1523 	 * class compliant request
1524 	 */
1525 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1526 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1527 		msleep(20);
1528 
1529 	/*
1530 	 * "TEAC Corp." products need a 20ms delay after each
1531 	 * class compliant request
1532 	 */
1533 	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
1534 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1535 		msleep(20);
1536 
1537 	/* ITF-USB DSD based DACs functionality need a delay
1538 	 * after each class compliant request
1539 	 */
1540 	if (is_itf_usb_dsd_dac(chip->usb_id)
1541 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1542 		msleep(20);
1543 
1544 	/* Zoom R16/24, Logitech H650e, Jabra 550a needs a tiny delay here,
1545 	 * otherwise requests like get/set frequency return as failed despite
1546 	 * actually succeeding.
1547 	 */
1548 	if ((chip->usb_id == USB_ID(0x1686, 0x00dd) ||
1549 	     chip->usb_id == USB_ID(0x046d, 0x0a46) ||
1550 	     chip->usb_id == USB_ID(0x0b0e, 0x0349)) &&
1551 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1552 		usleep_range(1000, 2000);
1553 }
1554 
1555 /*
1556  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1557  * augment the PCM format bit-field for DSD types. The UAC standards
1558  * don't have a designated bit field to denote DSD-capable interfaces,
1559  * hence all hardware that is known to support this format has to be
1560  * listed here.
1561  */
1562 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1563 					struct audioformat *fp,
1564 					unsigned int sample_bytes)
1565 {
1566 	struct usb_interface *iface;
1567 
1568 	/* Playback Designs */
1569 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1570 	    USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
1571 		switch (fp->altsetting) {
1572 		case 1:
1573 			fp->dsd_dop = true;
1574 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1575 		case 2:
1576 			fp->dsd_bitrev = true;
1577 			return SNDRV_PCM_FMTBIT_DSD_U8;
1578 		case 3:
1579 			fp->dsd_bitrev = true;
1580 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1581 		}
1582 	}
1583 
1584 	/* XMOS based USB DACs */
1585 	switch (chip->usb_id) {
1586 	case USB_ID(0x1511, 0x0037): /* AURALiC VEGA */
1587 	case USB_ID(0x2522, 0x0012): /* LH Labs VI DAC Infinity */
1588 	case USB_ID(0x2772, 0x0230): /* Pro-Ject Pre Box S2 Digital */
1589 		if (fp->altsetting == 2)
1590 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1591 		break;
1592 
1593 	case USB_ID(0x0d8c, 0x0316): /* Hegel HD12 DSD */
1594 	case USB_ID(0x10cb, 0x0103): /* The Bit Opus #3; with fp->dsd_raw */
1595 	case USB_ID(0x16b0, 0x06b2): /* NuPrime DAC-10 */
1596 	case USB_ID(0x16d0, 0x09dd): /* Encore mDSD */
1597 	case USB_ID(0x16d0, 0x0733): /* Furutech ADL Stratos */
1598 	case USB_ID(0x16d0, 0x09db): /* NuPrime Audio DAC-9 */
1599 	case USB_ID(0x1db5, 0x0003): /* Bryston BDA3 */
1600 	case USB_ID(0x22e1, 0xca01): /* HDTA Serenade DSD */
1601 	case USB_ID(0x249c, 0x9326): /* M2Tech Young MkIII */
1602 	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
1603 	case USB_ID(0x2622, 0x0041): /* Audiolab M-DAC+ */
1604 	case USB_ID(0x27f7, 0x3002): /* W4S DAC-2v2SE */
1605 	case USB_ID(0x29a2, 0x0086): /* Mutec MC3+ USB */
1606 	case USB_ID(0x6b42, 0x0042): /* MSB Technology */
1607 		if (fp->altsetting == 3)
1608 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1609 		break;
1610 
1611 	/* Amanero Combo384 USB based DACs with native DSD support */
1612 	case USB_ID(0x16d0, 0x071a):  /* Amanero - Combo384 */
1613 	case USB_ID(0x2ab6, 0x0004):  /* T+A DAC8DSD-V2.0, MP1000E-V2.0, MP2000R-V2.0, MP2500R-V2.0, MP3100HV-V2.0 */
1614 	case USB_ID(0x2ab6, 0x0005):  /* T+A USB HD Audio 1 */
1615 	case USB_ID(0x2ab6, 0x0006):  /* T+A USB HD Audio 2 */
1616 		if (fp->altsetting == 2) {
1617 			switch (le16_to_cpu(chip->dev->descriptor.bcdDevice)) {
1618 			case 0x199:
1619 				return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1620 			case 0x19b:
1621 			case 0x203:
1622 				return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1623 			default:
1624 				break;
1625 			}
1626 		}
1627 		break;
1628 	case USB_ID(0x16d0, 0x0a23):
1629 		if (fp->altsetting == 2)
1630 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1631 		break;
1632 
1633 	default:
1634 		break;
1635 	}
1636 
1637 	/* ITF-USB DSD based DACs */
1638 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1639 		iface = usb_ifnum_to_if(chip->dev, fp->iface);
1640 
1641 		/* Altsetting 2 support native DSD if the num of altsets is
1642 		 * three (0-2),
1643 		 * Altsetting 3 support native DSD if the num of altsets is
1644 		 * four (0-3).
1645 		 */
1646 		if (fp->altsetting == iface->num_altsetting - 1)
1647 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1648 	}
1649 
1650 	/* Mostly generic method to detect many DSD-capable implementations -
1651 	 * from XMOS/Thesycon
1652 	 */
1653 	switch (USB_ID_VENDOR(chip->usb_id)) {
1654 	case 0x152a:  /* Thesycon devices */
1655 	case 0x20b1:  /* XMOS based devices */
1656 	case 0x22d9:  /* Oppo */
1657 	case 0x23ba:  /* Playback Designs */
1658 	case 0x25ce:  /* Mytek devices */
1659 	case 0x278b:  /* Rotel? */
1660 	case 0x292b:  /* Gustard/Ess based devices */
1661 	case 0x2ab6:  /* T+A devices */
1662 	case 0x3842:  /* EVGA */
1663 	case 0xc502:  /* HiBy devices */
1664 		if (fp->dsd_raw)
1665 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1666 		break;
1667 	default:
1668 		break;
1669 
1670 	}
1671 
1672 	return 0;
1673 }
1674 
1675 void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
1676 					  struct audioformat *fp,
1677 					  int stream)
1678 {
1679 	switch (chip->usb_id) {
1680 	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1681 		/* Optoplay sets the sample rate attribute although
1682 		 * it seems not supporting it in fact.
1683 		 */
1684 		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
1685 		break;
1686 	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
1687 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1688 		/* doesn't set the sample rate attribute, but supports it */
1689 		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
1690 		break;
1691 	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
1692 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1693 	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
1694 	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
1695 					an older model 77d:223) */
1696 	/*
1697 	 * plantronics headset and Griffin iMic have set adaptive-in
1698 	 * although it's really not...
1699 	 */
1700 		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
1701 		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1702 			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
1703 		else
1704 			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
1705 		break;
1706 	}
1707 }
1708