xref: /openbmc/linux/sound/usb/quirks.c (revision 36acd5e2)
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);
181 	snd_usb_init_sample_rate(chip, 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 static int setup_disable_autosuspend(struct snd_usb_audio *chip,
512 				       struct usb_interface *iface,
513 				       struct usb_driver *driver,
514 				       const struct snd_usb_audio_quirk *quirk)
515 {
516 	driver->supports_autosuspend = 0;
517 	return 1;	/* Continue with creating streams and mixer */
518 }
519 
520 /*
521  * audio-interface quirks
522  *
523  * returns zero if no standard audio/MIDI parsing is needed.
524  * returns a positive value if standard audio/midi interfaces are parsed
525  * after this.
526  * returns a negative value at error.
527  */
528 int snd_usb_create_quirk(struct snd_usb_audio *chip,
529 			 struct usb_interface *iface,
530 			 struct usb_driver *driver,
531 			 const struct snd_usb_audio_quirk *quirk)
532 {
533 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
534 				    struct usb_interface *,
535 				    struct usb_driver *,
536 				    const struct snd_usb_audio_quirk *);
537 	static const quirk_func_t quirk_funcs[] = {
538 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
539 		[QUIRK_COMPOSITE] = create_composite_quirk,
540 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
541 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
542 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
543 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
544 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
545 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
546 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
547 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
548 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
549 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
550 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
551 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
552 		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
553 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
554 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
555 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
556 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
557 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
558 		[QUIRK_SETUP_DISABLE_AUTOSUSPEND] = setup_disable_autosuspend,
559 	};
560 
561 	if (quirk->type < QUIRK_TYPE_COUNT) {
562 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
563 	} else {
564 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
565 		return -ENXIO;
566 	}
567 }
568 
569 /*
570  * boot quirks
571  */
572 
573 #define EXTIGY_FIRMWARE_SIZE_OLD 794
574 #define EXTIGY_FIRMWARE_SIZE_NEW 483
575 
576 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
577 {
578 	struct usb_host_config *config = dev->actconfig;
579 	int err;
580 
581 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
582 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
583 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
584 		/* Send message to force it to reconnect with full interface. */
585 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
586 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
587 		if (err < 0)
588 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
589 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
590 				&dev->descriptor, sizeof(dev->descriptor));
591 		config = dev->actconfig;
592 		if (err < 0)
593 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
594 		err = usb_reset_configuration(dev);
595 		if (err < 0)
596 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
597 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
598 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
599 		return -ENODEV; /* quit this anyway */
600 	}
601 	return 0;
602 }
603 
604 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
605 {
606 	u8 buf = 1;
607 
608 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
609 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
610 			0, 0, &buf, 1);
611 	if (buf == 0) {
612 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
613 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
614 				1, 2000, NULL, 0);
615 		return -ENODEV;
616 	}
617 	return 0;
618 }
619 
620 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
621 {
622 	int err;
623 
624 	if (dev->actconfig->desc.bConfigurationValue == 1) {
625 		dev_info(&dev->dev,
626 			   "Fast Track Pro switching to config #2\n");
627 		/* This function has to be available by the usb core module.
628 		 * if it is not avialable the boot quirk has to be left out
629 		 * and the configuration has to be set by udev or hotplug
630 		 * rules
631 		 */
632 		err = usb_driver_set_configuration(dev, 2);
633 		if (err < 0)
634 			dev_dbg(&dev->dev,
635 				"error usb_driver_set_configuration: %d\n",
636 				err);
637 		/* Always return an error, so that we stop creating a device
638 		   that will just be destroyed and recreated with a new
639 		   configuration */
640 		return -ENODEV;
641 	} else
642 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
643 
644 	return 0;
645 }
646 
647 /*
648  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
649  * documented in the device's data sheet.
650  */
651 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
652 {
653 	u8 buf[4];
654 	buf[0] = 0x20;
655 	buf[1] = value & 0xff;
656 	buf[2] = (value >> 8) & 0xff;
657 	buf[3] = reg;
658 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
659 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
660 			       0, 0, &buf, 4);
661 }
662 
663 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
664 {
665 	/*
666 	 * Enable line-out driver mode, set headphone source to front
667 	 * channels, enable stereo mic.
668 	 */
669 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
670 }
671 
672 /*
673  * CM6206 registers from the CM6206 datasheet rev 2.1
674  */
675 #define CM6206_REG0_DMA_MASTER BIT(15)
676 #define CM6206_REG0_SPDIFO_RATE_48K (2 << 12)
677 #define CM6206_REG0_SPDIFO_RATE_96K (7 << 12)
678 /* Bit 4 thru 11 is the S/PDIF category code */
679 #define CM6206_REG0_SPDIFO_CAT_CODE_GENERAL (0 << 4)
680 #define CM6206_REG0_SPDIFO_EMPHASIS_CD BIT(3)
681 #define CM6206_REG0_SPDIFO_COPYRIGHT_NA BIT(2)
682 #define CM6206_REG0_SPDIFO_NON_AUDIO BIT(1)
683 #define CM6206_REG0_SPDIFO_PRO_FORMAT BIT(0)
684 
685 #define CM6206_REG1_TEST_SEL_CLK BIT(14)
686 #define CM6206_REG1_PLLBIN_EN BIT(13)
687 #define CM6206_REG1_SOFT_MUTE_EN BIT(12)
688 #define CM6206_REG1_GPIO4_OUT BIT(11)
689 #define CM6206_REG1_GPIO4_OE BIT(10)
690 #define CM6206_REG1_GPIO3_OUT BIT(9)
691 #define CM6206_REG1_GPIO3_OE BIT(8)
692 #define CM6206_REG1_GPIO2_OUT BIT(7)
693 #define CM6206_REG1_GPIO2_OE BIT(6)
694 #define CM6206_REG1_GPIO1_OUT BIT(5)
695 #define CM6206_REG1_GPIO1_OE BIT(4)
696 #define CM6206_REG1_SPDIFO_INVALID BIT(3)
697 #define CM6206_REG1_SPDIF_LOOP_EN BIT(2)
698 #define CM6206_REG1_SPDIFO_DIS BIT(1)
699 #define CM6206_REG1_SPDIFI_MIX BIT(0)
700 
701 #define CM6206_REG2_DRIVER_ON BIT(15)
702 #define CM6206_REG2_HEADP_SEL_SIDE_CHANNELS (0 << 13)
703 #define CM6206_REG2_HEADP_SEL_SURROUND_CHANNELS (1 << 13)
704 #define CM6206_REG2_HEADP_SEL_CENTER_SUBW (2 << 13)
705 #define CM6206_REG2_HEADP_SEL_FRONT_CHANNELS (3 << 13)
706 #define CM6206_REG2_MUTE_HEADPHONE_RIGHT BIT(12)
707 #define CM6206_REG2_MUTE_HEADPHONE_LEFT BIT(11)
708 #define CM6206_REG2_MUTE_REAR_SURROUND_RIGHT BIT(10)
709 #define CM6206_REG2_MUTE_REAR_SURROUND_LEFT BIT(9)
710 #define CM6206_REG2_MUTE_SIDE_SURROUND_RIGHT BIT(8)
711 #define CM6206_REG2_MUTE_SIDE_SURROUND_LEFT BIT(7)
712 #define CM6206_REG2_MUTE_SUBWOOFER BIT(6)
713 #define CM6206_REG2_MUTE_CENTER BIT(5)
714 #define CM6206_REG2_MUTE_RIGHT_FRONT BIT(3)
715 #define CM6206_REG2_MUTE_LEFT_FRONT BIT(3)
716 #define CM6206_REG2_EN_BTL BIT(2)
717 #define CM6206_REG2_MCUCLKSEL_1_5_MHZ (0)
718 #define CM6206_REG2_MCUCLKSEL_3_MHZ (1)
719 #define CM6206_REG2_MCUCLKSEL_6_MHZ (2)
720 #define CM6206_REG2_MCUCLKSEL_12_MHZ (3)
721 
722 /* Bit 11..13 sets the sensitivity to FLY tuner volume control VP/VD signal */
723 #define CM6206_REG3_FLYSPEED_DEFAULT (2 << 11)
724 #define CM6206_REG3_VRAP25EN BIT(10)
725 #define CM6206_REG3_MSEL1 BIT(9)
726 #define CM6206_REG3_SPDIFI_RATE_44_1K BIT(0 << 7)
727 #define CM6206_REG3_SPDIFI_RATE_48K BIT(2 << 7)
728 #define CM6206_REG3_SPDIFI_RATE_32K BIT(3 << 7)
729 #define CM6206_REG3_PINSEL BIT(6)
730 #define CM6206_REG3_FOE BIT(5)
731 #define CM6206_REG3_ROE BIT(4)
732 #define CM6206_REG3_CBOE BIT(3)
733 #define CM6206_REG3_LOSE BIT(2)
734 #define CM6206_REG3_HPOE BIT(1)
735 #define CM6206_REG3_SPDIFI_CANREC BIT(0)
736 
737 #define CM6206_REG5_DA_RSTN BIT(13)
738 #define CM6206_REG5_AD_RSTN BIT(12)
739 #define CM6206_REG5_SPDIFO_AD2SPDO BIT(12)
740 #define CM6206_REG5_SPDIFO_SEL_FRONT (0 << 9)
741 #define CM6206_REG5_SPDIFO_SEL_SIDE_SUR (1 << 9)
742 #define CM6206_REG5_SPDIFO_SEL_CEN_LFE (2 << 9)
743 #define CM6206_REG5_SPDIFO_SEL_REAR_SUR (3 << 9)
744 #define CM6206_REG5_CODECM BIT(8)
745 #define CM6206_REG5_EN_HPF BIT(7)
746 #define CM6206_REG5_T_SEL_DSDA4 BIT(6)
747 #define CM6206_REG5_T_SEL_DSDA3 BIT(5)
748 #define CM6206_REG5_T_SEL_DSDA2 BIT(4)
749 #define CM6206_REG5_T_SEL_DSDA1 BIT(3)
750 #define CM6206_REG5_T_SEL_DSDAD_NORMAL 0
751 #define CM6206_REG5_T_SEL_DSDAD_FRONT 4
752 #define CM6206_REG5_T_SEL_DSDAD_S_SURROUND 5
753 #define CM6206_REG5_T_SEL_DSDAD_CEN_LFE 6
754 #define CM6206_REG5_T_SEL_DSDAD_R_SURROUND 7
755 
756 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
757 {
758 	int err  = 0, reg;
759 	int val[] = {
760 		/*
761 		 * Values here are chosen based on sniffing USB traffic
762 		 * under Windows.
763 		 *
764 		 * REG0: DAC is master, sample rate 48kHz, no copyright
765 		 */
766 		CM6206_REG0_SPDIFO_RATE_48K |
767 		CM6206_REG0_SPDIFO_COPYRIGHT_NA,
768 		/*
769 		 * REG1: PLL binary search enable, soft mute enable.
770 		 */
771 		CM6206_REG1_PLLBIN_EN |
772 		CM6206_REG1_SOFT_MUTE_EN,
773 		/*
774 		 * REG2: enable output drivers,
775 		 * select front channels to the headphone output,
776 		 * then mute the headphone channels, run the MCU
777 		 * at 1.5 MHz.
778 		 */
779 		CM6206_REG2_DRIVER_ON |
780 		CM6206_REG2_HEADP_SEL_FRONT_CHANNELS |
781 		CM6206_REG2_MUTE_HEADPHONE_RIGHT |
782 		CM6206_REG2_MUTE_HEADPHONE_LEFT,
783 		/*
784 		 * REG3: default flyspeed, set 2.5V mic bias
785 		 * enable all line out ports and enable SPDIF
786 		 */
787 		CM6206_REG3_FLYSPEED_DEFAULT |
788 		CM6206_REG3_VRAP25EN |
789 		CM6206_REG3_FOE |
790 		CM6206_REG3_ROE |
791 		CM6206_REG3_CBOE |
792 		CM6206_REG3_LOSE |
793 		CM6206_REG3_HPOE |
794 		CM6206_REG3_SPDIFI_CANREC,
795 		/* REG4 is just a bunch of GPIO lines */
796 		0x0000,
797 		/* REG5: de-assert AD/DA reset signals */
798 		CM6206_REG5_DA_RSTN |
799 		CM6206_REG5_AD_RSTN };
800 
801 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
802 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
803 		if (err < 0)
804 			return err;
805 	}
806 
807 	return err;
808 }
809 
810 /* quirk for Plantronics GameCom 780 with CM6302 chip */
811 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
812 {
813 	/* set the initial volume and don't change; other values are either
814 	 * too loud or silent due to firmware bug (bko#65251)
815 	 */
816 	u8 buf[2] = { 0x74, 0xe3 };
817 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
818 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
819 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
820 }
821 
822 /*
823  * Novation Twitch DJ controller
824  * Focusrite Novation Saffire 6 USB audio card
825  */
826 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
827 {
828 	/* preemptively set up the device because otherwise the
829 	 * raw MIDI endpoints are not active */
830 	usb_set_interface(dev, 0, 1);
831 	return 0;
832 }
833 
834 /*
835  * This call will put the synth in "USB send" mode, i.e it will send MIDI
836  * messages through USB (this is disabled at startup). The synth will
837  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
838  * sign on its LCD. Values here are chosen based on sniffing USB traffic
839  * under Windows.
840  */
841 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
842 {
843 	int err, actual_length;
844 	/* "midi send" enable */
845 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
846 	void *buf;
847 
848 	if (usb_pipe_type_check(dev, usb_sndintpipe(dev, 0x05)))
849 		return -EINVAL;
850 	buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
851 	if (!buf)
852 		return -ENOMEM;
853 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
854 			ARRAY_SIZE(seq), &actual_length, 1000);
855 	kfree(buf);
856 	if (err < 0)
857 		return err;
858 
859 	return 0;
860 }
861 
862 /*
863  * Some sound cards from Native Instruments are in fact compliant to the USB
864  * audio standard of version 2 and other approved USB standards, even though
865  * they come up as vendor-specific device when first connected.
866  *
867  * However, they can be told to come up with a new set of descriptors
868  * upon their next enumeration, and the interfaces announced by the new
869  * descriptors will then be handled by the kernel's class drivers. As the
870  * product ID will also change, no further checks are required.
871  */
872 
873 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
874 {
875 	int ret;
876 
877 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
878 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
879 				  1, 0, NULL, 0, 1000);
880 
881 	if (ret < 0)
882 		return ret;
883 
884 	usb_reset_device(dev);
885 
886 	/* return -EAGAIN, so the creation of an audio interface for this
887 	 * temporary device is aborted. The device will reconnect with a
888 	 * new product ID */
889 	return -EAGAIN;
890 }
891 
892 static void mbox2_setup_48_24_magic(struct usb_device *dev)
893 {
894 	u8 srate[3];
895 	u8 temp[12];
896 
897 	/* Choose 48000Hz permanently */
898 	srate[0] = 0x80;
899 	srate[1] = 0xbb;
900 	srate[2] = 0x00;
901 
902 	/* Send the magic! */
903 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
904 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
905 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
906 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
907 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
908 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
909 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
910 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
911 	return;
912 }
913 
914 /* Digidesign Mbox 2 needs to load firmware onboard
915  * and driver must wait a few seconds for initialisation.
916  */
917 
918 #define MBOX2_FIRMWARE_SIZE    646
919 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
920 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
921 
922 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
923 {
924 	struct usb_host_config *config = dev->actconfig;
925 	int err;
926 	u8 bootresponse[0x12];
927 	int fwsize;
928 	int count;
929 
930 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
931 
932 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
933 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
934 		return -ENODEV;
935 	}
936 
937 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
938 
939 	count = 0;
940 	bootresponse[0] = MBOX2_BOOT_LOADING;
941 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
942 		msleep(500); /* 0.5 second delay */
943 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
944 			/* Control magic - load onboard firmware */
945 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
946 		if (bootresponse[0] == MBOX2_BOOT_READY)
947 			break;
948 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
949 		count++;
950 	}
951 
952 	if (bootresponse[0] != MBOX2_BOOT_READY) {
953 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
954 		return -ENODEV;
955 	}
956 
957 	dev_dbg(&dev->dev, "device initialised!\n");
958 
959 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
960 		&dev->descriptor, sizeof(dev->descriptor));
961 	config = dev->actconfig;
962 	if (err < 0)
963 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
964 
965 	err = usb_reset_configuration(dev);
966 	if (err < 0)
967 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
968 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
969 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
970 
971 	mbox2_setup_48_24_magic(dev);
972 
973 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
974 
975 	return 0; /* Successful boot */
976 }
977 
978 static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
979 {
980 	int err;
981 
982 	dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
983 
984 	/* If the Axe-Fx III has not fully booted, it will timeout when trying
985 	 * to enable the audio streaming interface. A more generous timeout is
986 	 * used here to detect when the Axe-Fx III has finished booting as the
987 	 * set interface message will be acked once it has
988 	 */
989 	err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
990 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
991 				1, 1, NULL, 0, 120000);
992 	if (err < 0) {
993 		dev_err(&dev->dev,
994 			"failed waiting for Axe-Fx III to boot: %d\n", err);
995 		return err;
996 	}
997 
998 	dev_dbg(&dev->dev, "Axe-Fx III is now ready\n");
999 
1000 	err = usb_set_interface(dev, 1, 0);
1001 	if (err < 0)
1002 		dev_dbg(&dev->dev,
1003 			"error stopping Axe-Fx III interface: %d\n", err);
1004 
1005 	return 0;
1006 }
1007 
1008 
1009 #define MICROBOOK_BUF_SIZE 128
1010 
1011 static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
1012 						int buf_size, int *length)
1013 {
1014 	int err, actual_length;
1015 
1016 	if (usb_pipe_type_check(dev, usb_sndintpipe(dev, 0x01)))
1017 		return -EINVAL;
1018 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x01), buf, *length,
1019 				&actual_length, 1000);
1020 	if (err < 0)
1021 		return err;
1022 
1023 	print_hex_dump(KERN_DEBUG, "MicroBookII snd: ", DUMP_PREFIX_NONE, 16, 1,
1024 		       buf, actual_length, false);
1025 
1026 	memset(buf, 0, buf_size);
1027 
1028 	if (usb_pipe_type_check(dev, usb_rcvintpipe(dev, 0x82)))
1029 		return -EINVAL;
1030 	err = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 0x82), buf, buf_size,
1031 				&actual_length, 1000);
1032 	if (err < 0)
1033 		return err;
1034 
1035 	print_hex_dump(KERN_DEBUG, "MicroBookII rcv: ", DUMP_PREFIX_NONE, 16, 1,
1036 		       buf, actual_length, false);
1037 
1038 	*length = actual_length;
1039 	return 0;
1040 }
1041 
1042 static int snd_usb_motu_microbookii_boot_quirk(struct usb_device *dev)
1043 {
1044 	int err, actual_length, poll_attempts = 0;
1045 	static const u8 set_samplerate_seq[] = { 0x00, 0x00, 0x00, 0x00,
1046 						 0x00, 0x00, 0x0b, 0x14,
1047 						 0x00, 0x00, 0x00, 0x01 };
1048 	static const u8 poll_ready_seq[] = { 0x00, 0x04, 0x00, 0x00,
1049 					     0x00, 0x00, 0x0b, 0x18 };
1050 	u8 *buf = kzalloc(MICROBOOK_BUF_SIZE, GFP_KERNEL);
1051 
1052 	if (!buf)
1053 		return -ENOMEM;
1054 
1055 	dev_info(&dev->dev, "Waiting for MOTU Microbook II to boot up...\n");
1056 
1057 	/* First we tell the device which sample rate to use. */
1058 	memcpy(buf, set_samplerate_seq, sizeof(set_samplerate_seq));
1059 	actual_length = sizeof(set_samplerate_seq);
1060 	err = snd_usb_motu_microbookii_communicate(dev, buf, MICROBOOK_BUF_SIZE,
1061 						   &actual_length);
1062 
1063 	if (err < 0) {
1064 		dev_err(&dev->dev,
1065 			"failed setting the sample rate for Motu MicroBook II: %d\n",
1066 			err);
1067 		goto free_buf;
1068 	}
1069 
1070 	/* Then we poll every 100 ms until the device informs of its readiness. */
1071 	while (true) {
1072 		if (++poll_attempts > 100) {
1073 			dev_err(&dev->dev,
1074 				"failed booting Motu MicroBook II: timeout\n");
1075 			err = -ENODEV;
1076 			goto free_buf;
1077 		}
1078 
1079 		memset(buf, 0, MICROBOOK_BUF_SIZE);
1080 		memcpy(buf, poll_ready_seq, sizeof(poll_ready_seq));
1081 
1082 		actual_length = sizeof(poll_ready_seq);
1083 		err = snd_usb_motu_microbookii_communicate(
1084 			dev, buf, MICROBOOK_BUF_SIZE, &actual_length);
1085 		if (err < 0) {
1086 			dev_err(&dev->dev,
1087 				"failed booting Motu MicroBook II: communication error %d\n",
1088 				err);
1089 			goto free_buf;
1090 		}
1091 
1092 		/* the device signals its readiness through a message of the
1093 		 * form
1094 		 *           XX 06 00 00 00 00 0b 18  00 00 00 01
1095 		 * If the device is not yet ready to accept audio data, the
1096 		 * last byte of that sequence is 00.
1097 		 */
1098 		if (actual_length == 12 && buf[actual_length - 1] == 1)
1099 			break;
1100 
1101 		msleep(100);
1102 	}
1103 
1104 	dev_info(&dev->dev, "MOTU MicroBook II ready\n");
1105 
1106 free_buf:
1107 	kfree(buf);
1108 	return err;
1109 }
1110 
1111 static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev)
1112 {
1113 	msleep(2000);
1114 
1115 	return 0;
1116 }
1117 
1118 /*
1119  * Setup quirks
1120  */
1121 #define MAUDIO_SET		0x01 /* parse device_setup */
1122 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
1123 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
1124 #define MAUDIO_SET_96K		0x04 /* 48-96kHz rate if set, 8-48kHz otherwise */
1125 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
1126 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
1127 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
1128 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48kHz+Digital Input */
1129 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48kHz+No Digital Input */
1130 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48kHz+Digital Input */
1131 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48kHz+No Digital Input */
1132 
1133 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
1134 				      int iface, int altno)
1135 {
1136 	/* Reset ALL ifaces to 0 altsetting.
1137 	 * Call it for every possible altsetting of every interface.
1138 	 */
1139 	usb_set_interface(chip->dev, iface, 0);
1140 	if (chip->setup & MAUDIO_SET) {
1141 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
1142 			if (iface != 1 && iface != 2)
1143 				return 1; /* skip all interfaces but 1 and 2 */
1144 		} else {
1145 			unsigned int mask;
1146 			if (iface == 1 || iface == 2)
1147 				return 1; /* skip interfaces 1 and 2 */
1148 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1149 				return 1; /* skip this altsetting */
1150 			mask = chip->setup & MAUDIO_SET_MASK;
1151 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1152 				return 1; /* skip this altsetting */
1153 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1154 				return 1; /* skip this altsetting */
1155 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
1156 				return 1; /* skip this altsetting */
1157 		}
1158 	}
1159 	usb_audio_dbg(chip,
1160 		    "using altsetting %d for interface %d config %d\n",
1161 		    altno, iface, chip->setup);
1162 	return 0; /* keep this altsetting */
1163 }
1164 
1165 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
1166 					 int iface,
1167 					 int altno)
1168 {
1169 	/* Reset ALL ifaces to 0 altsetting.
1170 	 * Call it for every possible altsetting of every interface.
1171 	 */
1172 	usb_set_interface(chip->dev, iface, 0);
1173 
1174 	if (chip->setup & MAUDIO_SET) {
1175 		unsigned int mask;
1176 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
1177 			return 1; /* skip this altsetting */
1178 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
1179 			return 1; /* skip this altsetting */
1180 		mask = chip->setup & MAUDIO_SET_MASK;
1181 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
1182 			return 1; /* skip this altsetting */
1183 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
1184 			return 1; /* skip this altsetting */
1185 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
1186 			return 1; /* skip this altsetting */
1187 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
1188 			return 1; /* skip this altsetting */
1189 	}
1190 
1191 	return 0; /* keep this altsetting */
1192 }
1193 
1194 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
1195 					   int iface, int altno)
1196 {
1197 	/* Reset ALL ifaces to 0 altsetting.
1198 	 * Call it for every possible altsetting of every interface.
1199 	 */
1200 	usb_set_interface(chip->dev, iface, 0);
1201 
1202 	/* possible configuration where both inputs and only one output is
1203 	 *used is not supported by the current setup
1204 	 */
1205 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
1206 		if (chip->setup & MAUDIO_SET_96K) {
1207 			if (altno != 3 && altno != 6)
1208 				return 1;
1209 		} else if (chip->setup & MAUDIO_SET_DI) {
1210 			if (iface == 4)
1211 				return 1; /* no analog input */
1212 			if (altno != 2 && altno != 5)
1213 				return 1; /* enable only altsets 2 and 5 */
1214 		} else {
1215 			if (iface == 5)
1216 				return 1; /* disable digialt input */
1217 			if (altno != 2 && altno != 5)
1218 				return 1; /* enalbe only altsets 2 and 5 */
1219 		}
1220 	} else {
1221 		/* keep only 16-Bit mode */
1222 		if (altno != 1)
1223 			return 1;
1224 	}
1225 
1226 	usb_audio_dbg(chip,
1227 		    "using altsetting %d for interface %d config %d\n",
1228 		    altno, iface, chip->setup);
1229 	return 0; /* keep this altsetting */
1230 }
1231 
1232 static int s1810c_skip_setting_quirk(struct snd_usb_audio *chip,
1233 					   int iface, int altno)
1234 {
1235 	/*
1236 	 * Altno settings:
1237 	 *
1238 	 * Playback (Interface 1):
1239 	 * 1: 6 Analog + 2 S/PDIF
1240 	 * 2: 6 Analog + 2 S/PDIF
1241 	 * 3: 6 Analog
1242 	 *
1243 	 * Capture (Interface 2):
1244 	 * 1: 8 Analog + 2 S/PDIF + 8 ADAT
1245 	 * 2: 8 Analog + 2 S/PDIF + 4 ADAT
1246 	 * 3: 8 Analog
1247 	 */
1248 
1249 	/*
1250 	 * I'll leave 2 as the default one and
1251 	 * use device_setup to switch to the
1252 	 * other two.
1253 	 */
1254 	if ((chip->setup == 0 || chip->setup > 2) && altno != 2)
1255 		return 1;
1256 	else if (chip->setup == 1 && altno != 1)
1257 		return 1;
1258 	else if (chip->setup == 2 && altno != 3)
1259 		return 1;
1260 
1261 	return 0;
1262 }
1263 
1264 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
1265 				  int iface,
1266 				  int altno)
1267 {
1268 	/* audiophile usb: skip altsets incompatible with device_setup */
1269 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
1270 		return audiophile_skip_setting_quirk(chip, iface, altno);
1271 	/* quattro usb: skip altsets incompatible with device_setup */
1272 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
1273 		return quattro_skip_setting_quirk(chip, iface, altno);
1274 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
1275 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
1276 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
1277 	/* presonus studio 1810c: skip altsets incompatible with device_setup */
1278 	if (chip->usb_id == USB_ID(0x0194f, 0x010c))
1279 		return s1810c_skip_setting_quirk(chip, iface, altno);
1280 
1281 
1282 	return 0;
1283 }
1284 
1285 int snd_usb_apply_boot_quirk(struct usb_device *dev,
1286 			     struct usb_interface *intf,
1287 			     const struct snd_usb_audio_quirk *quirk,
1288 			     unsigned int id)
1289 {
1290 	switch (id) {
1291 	case USB_ID(0x041e, 0x3000):
1292 		/* SB Extigy needs special boot-up sequence */
1293 		/* if more models come, this will go to the quirk list. */
1294 		return snd_usb_extigy_boot_quirk(dev, intf);
1295 
1296 	case USB_ID(0x041e, 0x3020):
1297 		/* SB Audigy 2 NX needs its own boot-up magic, too */
1298 		return snd_usb_audigy2nx_boot_quirk(dev);
1299 
1300 	case USB_ID(0x10f5, 0x0200):
1301 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
1302 		return snd_usb_cm106_boot_quirk(dev);
1303 
1304 	case USB_ID(0x0d8c, 0x0102):
1305 		/* C-Media CM6206 / CM106-Like Sound Device */
1306 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
1307 		return snd_usb_cm6206_boot_quirk(dev);
1308 
1309 	case USB_ID(0x0dba, 0x3000):
1310 		/* Digidesign Mbox 2 */
1311 		return snd_usb_mbox2_boot_quirk(dev);
1312 
1313 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
1314 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
1315 		return snd_usb_novation_boot_quirk(dev);
1316 
1317 	case USB_ID(0x133e, 0x0815):
1318 		/* Access Music VirusTI Desktop */
1319 		return snd_usb_accessmusic_boot_quirk(dev);
1320 
1321 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1322 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1323 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1324 		return snd_usb_nativeinstruments_boot_quirk(dev);
1325 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1326 		return snd_usb_fasttrackpro_boot_quirk(dev);
1327 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1328 		return snd_usb_gamecon780_boot_quirk(dev);
1329 	case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx 3 */
1330 		return snd_usb_axefx3_boot_quirk(dev);
1331 	case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II */
1332 		/*
1333 		 * For some reason interface 3 with vendor-spec class is
1334 		 * detected on MicroBook IIc.
1335 		 */
1336 		if (get_iface_desc(intf->altsetting)->bInterfaceClass ==
1337 		    USB_CLASS_VENDOR_SPEC &&
1338 		    get_iface_desc(intf->altsetting)->bInterfaceNumber < 3)
1339 			return snd_usb_motu_microbookii_boot_quirk(dev);
1340 		break;
1341 	}
1342 
1343 	return 0;
1344 }
1345 
1346 int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
1347 				  struct usb_interface *intf,
1348 				  const struct snd_usb_audio_quirk *quirk,
1349 				  unsigned int id)
1350 {
1351 	switch (id) {
1352 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
1353 		return snd_usb_motu_m_series_boot_quirk(dev);
1354 	}
1355 
1356 	return 0;
1357 }
1358 
1359 /*
1360  * check if the device uses big-endian samples
1361  */
1362 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip,
1363 				 const struct audioformat *fp)
1364 {
1365 	/* it depends on altsetting whether the device is big-endian or not */
1366 	switch (chip->usb_id) {
1367 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1368 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1369 			fp->altsetting == 5 || fp->altsetting == 6)
1370 			return 1;
1371 		break;
1372 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1373 		if (chip->setup == 0x00 ||
1374 			fp->altsetting == 1 || fp->altsetting == 2 ||
1375 			fp->altsetting == 3)
1376 			return 1;
1377 		break;
1378 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1379 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1380 			fp->altsetting == 5 || fp->altsetting == 6)
1381 			return 1;
1382 		break;
1383 	}
1384 	return 0;
1385 }
1386 
1387 /*
1388  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1389  * not for interface.
1390  */
1391 
1392 enum {
1393 	EMU_QUIRK_SR_44100HZ = 0,
1394 	EMU_QUIRK_SR_48000HZ,
1395 	EMU_QUIRK_SR_88200HZ,
1396 	EMU_QUIRK_SR_96000HZ,
1397 	EMU_QUIRK_SR_176400HZ,
1398 	EMU_QUIRK_SR_192000HZ
1399 };
1400 
1401 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1402 				 const struct audioformat *fmt)
1403 {
1404 	unsigned char emu_samplerate_id = 0;
1405 
1406 	/* When capture is active
1407 	 * sample rate shouldn't be changed
1408 	 * by playback substream
1409 	 */
1410 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1411 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].cur_audiofmt)
1412 			return;
1413 	}
1414 
1415 	switch (fmt->rate_min) {
1416 	case 48000:
1417 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1418 		break;
1419 	case 88200:
1420 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1421 		break;
1422 	case 96000:
1423 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1424 		break;
1425 	case 176400:
1426 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1427 		break;
1428 	case 192000:
1429 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1430 		break;
1431 	default:
1432 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1433 		break;
1434 	}
1435 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1436 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1437 }
1438 
1439 
1440 /*
1441  * Pioneer DJ DJM-900NXS2
1442  * Device needs to know the sample rate each time substream is started
1443  */
1444 static int pioneer_djm_set_format_quirk(struct snd_usb_substream *subs)
1445 {
1446 	unsigned int cur_rate = subs->data_endpoint->cur_rate;
1447 	/* Convert sample rate value to little endian */
1448 	u8 sr[3];
1449 
1450 	sr[0] = cur_rate & 0xff;
1451 	sr[1] = (cur_rate >> 8) & 0xff;
1452 	sr[2] = (cur_rate >> 16) & 0xff;
1453 
1454 	/* Configure device */
1455 	usb_set_interface(subs->dev, 0, 1);
1456 	snd_usb_ctl_msg(subs->stream->chip->dev,
1457 		usb_rcvctrlpipe(subs->stream->chip->dev, 0),
1458 		0x01, 0x22, 0x0100, 0x0082, &sr, 0x0003);
1459 
1460 	return 0;
1461 }
1462 
1463 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1464 			      const struct audioformat *fmt)
1465 {
1466 	switch (subs->stream->chip->usb_id) {
1467 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1468 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1469 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1470 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1471 		set_format_emu_quirk(subs, fmt);
1472 		break;
1473 	case USB_ID(0x2b73, 0x000a): /* Pioneer DJ DJM-900NXS2 */
1474 	case USB_ID(0x2b73, 0x0017): /* Pioneer DJ DJM-250MK2 */
1475 		pioneer_djm_set_format_quirk(subs);
1476 		break;
1477 	case USB_ID(0x534d, 0x2109): /* MacroSilicon MS2109 */
1478 		subs->stream_offset_adj = 2;
1479 		break;
1480 	}
1481 }
1482 
1483 bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
1484 {
1485 	/* devices which do not support reading the sample rate. */
1486 	switch (chip->usb_id) {
1487 	case USB_ID(0x041e, 0x4080): /* Creative Live Cam VF0610 */
1488 	case USB_ID(0x04d8, 0xfeea): /* Benchmark DAC1 Pre */
1489 	case USB_ID(0x0556, 0x0014): /* Phoenix Audio TMX320VC */
1490 	case USB_ID(0x05a3, 0x9420): /* ELP HD USB Camera */
1491 	case USB_ID(0x05a7, 0x1020): /* Bose Companion 5 */
1492 	case USB_ID(0x074d, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
1493 	case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */
1494 	case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */
1495 	case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
1496 	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
1497 		return true;
1498 	}
1499 
1500 	/* devices of these vendors don't support reading rate, either */
1501 	switch (USB_ID_VENDOR(chip->usb_id)) {
1502 	case 0x045e: /* MS Lifecam */
1503 	case 0x047f: /* Plantronics */
1504 	case 0x1de7: /* Phoenix Audio */
1505 		return true;
1506 	}
1507 
1508 	return false;
1509 }
1510 
1511 /* ITF-USB DSD based DACs need a vendor cmd to switch
1512  * between PCM and native DSD mode
1513  */
1514 static bool is_itf_usb_dsd_dac(unsigned int id)
1515 {
1516 	switch (id) {
1517 	case USB_ID(0x154e, 0x1002): /* Denon DCD-1500RE */
1518 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
1519 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
1520 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
1521 	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
1522 	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
1523 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
1524 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
1525 		return true;
1526 	}
1527 	return false;
1528 }
1529 
1530 int snd_usb_select_mode_quirk(struct snd_usb_audio *chip,
1531 			      const struct audioformat *fmt)
1532 {
1533 	struct usb_device *dev = chip->dev;
1534 	int err;
1535 
1536 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1537 		/* First switch to alt set 0, otherwise the mode switch cmd
1538 		 * will not be accepted by the DAC
1539 		 */
1540 		err = usb_set_interface(dev, fmt->iface, 0);
1541 		if (err < 0)
1542 			return err;
1543 
1544 		msleep(20); /* Delay needed after setting the interface */
1545 
1546 		/* Vendor mode switch cmd is required. */
1547 		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
1548 			/* DSD mode (DSD_U32) requested */
1549 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1550 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1551 					      1, 1, NULL, 0);
1552 			if (err < 0)
1553 				return err;
1554 
1555 		} else {
1556 			/* PCM or DOP mode (S32) requested */
1557 			/* PCM mode (S16) requested */
1558 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
1559 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
1560 					      0, 1, NULL, 0);
1561 			if (err < 0)
1562 				return err;
1563 
1564 		}
1565 		msleep(20);
1566 	}
1567 	return 0;
1568 }
1569 
1570 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1571 {
1572 	/*
1573 	 * "Playback Design" products send bogus feedback data at the start
1574 	 * of the stream. Ignore them.
1575 	 */
1576 	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
1577 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1578 		ep->skip_packets = 4;
1579 
1580 	/*
1581 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1582 	 * world latency varies by approx. +/- 50 frames (at 96kHz) each time
1583 	 * the stream is (re)started. When skipping packets 16 at endpoint
1584 	 * start up, the real world latency is stable within +/- 1 frame (also
1585 	 * across power cycles).
1586 	 */
1587 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1588 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1589 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1590 		ep->skip_packets = 16;
1591 
1592 	/* Work around devices that report unreasonable feedback data */
1593 	if ((ep->chip->usb_id == USB_ID(0x0644, 0x8038) ||  /* TEAC UD-H01 */
1594 	     ep->chip->usb_id == USB_ID(0x1852, 0x5034)) && /* T+A Dac8 */
1595 	    ep->syncmaxsize == 4)
1596 		ep->tenor_fb_quirk = 1;
1597 }
1598 
1599 void snd_usb_set_interface_quirk(struct snd_usb_audio *chip)
1600 {
1601 	if (!chip)
1602 		return;
1603 	/*
1604 	 * "Playback Design" products need a 50ms delay after setting the
1605 	 * USB interface.
1606 	 */
1607 	switch (USB_ID_VENDOR(chip->usb_id)) {
1608 	case 0x23ba: /* Playback Design */
1609 	case 0x0644: /* TEAC Corp. */
1610 		msleep(50);
1611 		break;
1612 	}
1613 }
1614 
1615 /* quirk applied after snd_usb_ctl_msg(); not applied during boot quirks */
1616 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1617 			   __u8 request, __u8 requesttype, __u16 value,
1618 			   __u16 index, void *data, __u16 size)
1619 {
1620 	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);
1621 
1622 	if (!chip)
1623 		return;
1624 	/*
1625 	 * "Playback Design" products need a 20ms delay after each
1626 	 * class compliant request
1627 	 */
1628 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1629 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1630 		msleep(20);
1631 
1632 	/*
1633 	 * "TEAC Corp." products need a 20ms delay after each
1634 	 * class compliant request
1635 	 */
1636 	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
1637 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1638 		msleep(20);
1639 
1640 	/* ITF-USB DSD based DACs functionality need a delay
1641 	 * after each class compliant request
1642 	 */
1643 	if (is_itf_usb_dsd_dac(chip->usb_id)
1644 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1645 		msleep(20);
1646 
1647 	/* Zoom R16/24, many Logitech(at least H650e/H570e/BCC950),
1648 	 * Jabra 550a, Kingston HyperX needs a tiny delay here,
1649 	 * otherwise requests like get/set frequency return
1650 	 * as failed despite actually succeeding.
1651 	 */
1652 	if ((chip->usb_id == USB_ID(0x1686, 0x00dd) ||
1653 	     USB_ID_VENDOR(chip->usb_id) == 0x046d  || /* Logitech */
1654 	     chip->usb_id == USB_ID(0x0b0e, 0x0349) ||
1655 	     chip->usb_id == USB_ID(0x0951, 0x16ad)) &&
1656 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1657 		usleep_range(1000, 2000);
1658 
1659 	/*
1660 	 * Samsung USBC Headset (AKG) need a tiny delay after each
1661 	 * class compliant request. (Model number: AAM625R or AAM627R)
1662 	 */
1663 	if (chip->usb_id == USB_ID(0x04e8, 0xa051) &&
1664 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1665 		usleep_range(5000, 6000);
1666 }
1667 
1668 /*
1669  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1670  * augment the PCM format bit-field for DSD types. The UAC standards
1671  * don't have a designated bit field to denote DSD-capable interfaces,
1672  * hence all hardware that is known to support this format has to be
1673  * listed here.
1674  */
1675 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1676 					struct audioformat *fp,
1677 					unsigned int sample_bytes)
1678 {
1679 	struct usb_interface *iface;
1680 
1681 	/* Playback Designs */
1682 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
1683 	    USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
1684 		switch (fp->altsetting) {
1685 		case 1:
1686 			fp->dsd_dop = true;
1687 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1688 		case 2:
1689 			fp->dsd_bitrev = true;
1690 			return SNDRV_PCM_FMTBIT_DSD_U8;
1691 		case 3:
1692 			fp->dsd_bitrev = true;
1693 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1694 		}
1695 	}
1696 
1697 	/* XMOS based USB DACs */
1698 	switch (chip->usb_id) {
1699 	case USB_ID(0x1511, 0x0037): /* AURALiC VEGA */
1700 	case USB_ID(0x2522, 0x0012): /* LH Labs VI DAC Infinity */
1701 	case USB_ID(0x2772, 0x0230): /* Pro-Ject Pre Box S2 Digital */
1702 		if (fp->altsetting == 2)
1703 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1704 		break;
1705 
1706 	case USB_ID(0x0d8c, 0x0316): /* Hegel HD12 DSD */
1707 	case USB_ID(0x10cb, 0x0103): /* The Bit Opus #3; with fp->dsd_raw */
1708 	case USB_ID(0x16d0, 0x06b2): /* NuPrime DAC-10 */
1709 	case USB_ID(0x16d0, 0x09dd): /* Encore mDSD */
1710 	case USB_ID(0x16d0, 0x0733): /* Furutech ADL Stratos */
1711 	case USB_ID(0x16d0, 0x09db): /* NuPrime Audio DAC-9 */
1712 	case USB_ID(0x1db5, 0x0003): /* Bryston BDA3 */
1713 	case USB_ID(0x22e1, 0xca01): /* HDTA Serenade DSD */
1714 	case USB_ID(0x249c, 0x9326): /* M2Tech Young MkIII */
1715 	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
1716 	case USB_ID(0x2622, 0x0041): /* Audiolab M-DAC+ */
1717 	case USB_ID(0x27f7, 0x3002): /* W4S DAC-2v2SE */
1718 	case USB_ID(0x29a2, 0x0086): /* Mutec MC3+ USB */
1719 	case USB_ID(0x6b42, 0x0042): /* MSB Technology */
1720 		if (fp->altsetting == 3)
1721 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1722 		break;
1723 
1724 	/* Amanero Combo384 USB based DACs with native DSD support */
1725 	case USB_ID(0x16d0, 0x071a):  /* Amanero - Combo384 */
1726 	case USB_ID(0x2ab6, 0x0004):  /* T+A DAC8DSD-V2.0, MP1000E-V2.0, MP2000R-V2.0, MP2500R-V2.0, MP3100HV-V2.0 */
1727 	case USB_ID(0x2ab6, 0x0005):  /* T+A USB HD Audio 1 */
1728 	case USB_ID(0x2ab6, 0x0006):  /* T+A USB HD Audio 2 */
1729 		if (fp->altsetting == 2) {
1730 			switch (le16_to_cpu(chip->dev->descriptor.bcdDevice)) {
1731 			case 0x199:
1732 				return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1733 			case 0x19b:
1734 			case 0x203:
1735 				return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1736 			default:
1737 				break;
1738 			}
1739 		}
1740 		break;
1741 	case USB_ID(0x16d0, 0x0a23):
1742 		if (fp->altsetting == 2)
1743 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1744 		break;
1745 
1746 	default:
1747 		break;
1748 	}
1749 
1750 	/* ITF-USB DSD based DACs */
1751 	if (is_itf_usb_dsd_dac(chip->usb_id)) {
1752 		iface = usb_ifnum_to_if(chip->dev, fp->iface);
1753 
1754 		/* Altsetting 2 support native DSD if the num of altsets is
1755 		 * three (0-2),
1756 		 * Altsetting 3 support native DSD if the num of altsets is
1757 		 * four (0-3).
1758 		 */
1759 		if (fp->altsetting == iface->num_altsetting - 1)
1760 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1761 	}
1762 
1763 	/* Mostly generic method to detect many DSD-capable implementations -
1764 	 * from XMOS/Thesycon
1765 	 */
1766 	switch (USB_ID_VENDOR(chip->usb_id)) {
1767 	case 0x152a:  /* Thesycon devices */
1768 	case 0x20b1:  /* XMOS based devices */
1769 	case 0x22d9:  /* Oppo */
1770 	case 0x23ba:  /* Playback Designs */
1771 	case 0x25ce:  /* Mytek devices */
1772 	case 0x278b:  /* Rotel? */
1773 	case 0x292b:  /* Gustard/Ess based devices */
1774 	case 0x2972:  /* FiiO devices */
1775 	case 0x2ab6:  /* T+A devices */
1776 	case 0x3353:  /* Khadas devices */
1777 	case 0x3842:  /* EVGA */
1778 	case 0xc502:  /* HiBy devices */
1779 		if (fp->dsd_raw)
1780 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
1781 		break;
1782 	default:
1783 		break;
1784 
1785 	}
1786 
1787 	return 0;
1788 }
1789 
1790 void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
1791 					  struct audioformat *fp,
1792 					  int stream)
1793 {
1794 	switch (chip->usb_id) {
1795 	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1796 		/* Optoplay sets the sample rate attribute although
1797 		 * it seems not supporting it in fact.
1798 		 */
1799 		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
1800 		break;
1801 	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
1802 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1803 		/* doesn't set the sample rate attribute, but supports it */
1804 		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
1805 		break;
1806 	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
1807 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1808 	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
1809 	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
1810 					an older model 77d:223) */
1811 	/*
1812 	 * plantronics headset and Griffin iMic have set adaptive-in
1813 	 * although it's really not...
1814 	 */
1815 		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
1816 		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1817 			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
1818 		else
1819 			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
1820 		break;
1821 	case USB_ID(0x07fd, 0x0004):  /* MOTU MicroBook IIc */
1822 		/*
1823 		 * MaxPacketsOnly attribute is erroneously set in endpoint
1824 		 * descriptors. As a result this card produces noise with
1825 		 * all sample rates other than 96 kHz.
1826 		 */
1827 		fp->attributes &= ~UAC_EP_CS_ATTR_FILL_MAX;
1828 		break;
1829 	}
1830 }
1831 
1832 /*
1833  * registration quirk:
1834  * the registration is skipped if a device matches with the given ID,
1835  * unless the interface reaches to the defined one.  This is for delaying
1836  * the registration until the last known interface, so that the card and
1837  * devices appear at the same time.
1838  */
1839 
1840 struct registration_quirk {
1841 	unsigned int usb_id;	/* composed via USB_ID() */
1842 	unsigned int interface;	/* the interface to trigger register */
1843 };
1844 
1845 #define REG_QUIRK_ENTRY(vendor, product, iface) \
1846 	{ .usb_id = USB_ID(vendor, product), .interface = (iface) }
1847 
1848 static const struct registration_quirk registration_quirks[] = {
1849 	REG_QUIRK_ENTRY(0x0951, 0x16d8, 2),	/* Kingston HyperX AMP */
1850 	REG_QUIRK_ENTRY(0x0951, 0x16ed, 2),	/* Kingston HyperX Cloud Alpha S */
1851 	REG_QUIRK_ENTRY(0x0951, 0x16ea, 2),	/* Kingston HyperX Cloud Flight S */
1852 	{ 0 }					/* terminator */
1853 };
1854 
1855 /* return true if skipping registration */
1856 bool snd_usb_registration_quirk(struct snd_usb_audio *chip, int iface)
1857 {
1858 	const struct registration_quirk *q;
1859 
1860 	for (q = registration_quirks; q->usb_id; q++)
1861 		if (chip->usb_id == q->usb_id)
1862 			return iface != q->interface;
1863 
1864 	/* Register as normal */
1865 	return false;
1866 }
1867