xref: /openbmc/linux/sound/usb/quirks.c (revision e1f7c9ee)
1 /*
2  *   This program is free software; you can redistribute it and/or modify
3  *   it under the terms of the GNU General Public License as published by
4  *   the Free Software Foundation; either version 2 of the License, or
5  *   (at your option) any later version.
6  *
7  *   This program is distributed in the hope that it will be useful,
8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  *   GNU General Public License for more details.
11  *
12  *   You should have received a copy of the GNU General Public License
13  *   along with this program; if not, write to the Free Software
14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
15  */
16 
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/usb.h>
20 #include <linux/usb/audio.h>
21 #include <linux/usb/midi.h>
22 
23 #include <sound/control.h>
24 #include <sound/core.h>
25 #include <sound/info.h>
26 #include <sound/pcm.h>
27 
28 #include "usbaudio.h"
29 #include "card.h"
30 #include "mixer.h"
31 #include "mixer_quirks.h"
32 #include "midi.h"
33 #include "quirks.h"
34 #include "helper.h"
35 #include "endpoint.h"
36 #include "pcm.h"
37 #include "clock.h"
38 #include "stream.h"
39 
40 /*
41  * handle the quirks for the contained interfaces
42  */
43 static int create_composite_quirk(struct snd_usb_audio *chip,
44 				  struct usb_interface *iface,
45 				  struct usb_driver *driver,
46 				  const struct snd_usb_audio_quirk *quirk)
47 {
48 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
49 	int err;
50 
51 	for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
52 		iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
53 		if (!iface)
54 			continue;
55 		if (quirk->ifnum != probed_ifnum &&
56 		    usb_interface_claimed(iface))
57 			continue;
58 		err = snd_usb_create_quirk(chip, iface, driver, quirk);
59 		if (err < 0)
60 			return err;
61 		if (quirk->ifnum != probed_ifnum)
62 			usb_driver_claim_interface(driver, iface, (void *)-1L);
63 	}
64 	return 0;
65 }
66 
67 static int ignore_interface_quirk(struct snd_usb_audio *chip,
68 				  struct usb_interface *iface,
69 				  struct usb_driver *driver,
70 				  const struct snd_usb_audio_quirk *quirk)
71 {
72 	return 0;
73 }
74 
75 
76 /*
77  * Allow alignment on audio sub-slot (channel samples) rather than
78  * on audio slots (audio frames)
79  */
80 static int create_align_transfer_quirk(struct snd_usb_audio *chip,
81 				       struct usb_interface *iface,
82 				       struct usb_driver *driver,
83 				       const struct snd_usb_audio_quirk *quirk)
84 {
85 	chip->txfr_quirk = 1;
86 	return 1;	/* Continue with creating streams and mixer */
87 }
88 
89 static int create_any_midi_quirk(struct snd_usb_audio *chip,
90 				 struct usb_interface *intf,
91 				 struct usb_driver *driver,
92 				 const struct snd_usb_audio_quirk *quirk)
93 {
94 	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
95 }
96 
97 /*
98  * create a stream for an interface with proper descriptors
99  */
100 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
101 				       struct usb_interface *iface,
102 				       struct usb_driver *driver,
103 				       const struct snd_usb_audio_quirk *quirk)
104 {
105 	struct usb_host_interface *alts;
106 	struct usb_interface_descriptor *altsd;
107 	int err;
108 
109 	alts = &iface->altsetting[0];
110 	altsd = get_iface_desc(alts);
111 	err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
112 	if (err < 0) {
113 		usb_audio_err(chip, "cannot setup if %d: error %d\n",
114 			   altsd->bInterfaceNumber, err);
115 		return err;
116 	}
117 	/* reset the current interface */
118 	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
119 	return 0;
120 }
121 
122 /*
123  * create a stream for an endpoint/altsetting without proper descriptors
124  */
125 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
126 				     struct usb_interface *iface,
127 				     struct usb_driver *driver,
128 				     const struct snd_usb_audio_quirk *quirk)
129 {
130 	struct audioformat *fp;
131 	struct usb_host_interface *alts;
132 	struct usb_interface_descriptor *altsd;
133 	int stream, err;
134 	unsigned *rate_table = NULL;
135 
136 	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
137 	if (!fp) {
138 		usb_audio_err(chip, "cannot memdup\n");
139 		return -ENOMEM;
140 	}
141 	if (fp->nr_rates > MAX_NR_RATES) {
142 		kfree(fp);
143 		return -EINVAL;
144 	}
145 	if (fp->nr_rates > 0) {
146 		rate_table = kmemdup(fp->rate_table,
147 				     sizeof(int) * fp->nr_rates, GFP_KERNEL);
148 		if (!rate_table) {
149 			kfree(fp);
150 			return -ENOMEM;
151 		}
152 		fp->rate_table = rate_table;
153 	}
154 
155 	stream = (fp->endpoint & USB_DIR_IN)
156 		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
157 	err = snd_usb_add_audio_stream(chip, stream, fp);
158 	if (err < 0) {
159 		kfree(fp);
160 		kfree(rate_table);
161 		return err;
162 	}
163 	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
164 	    fp->altset_idx >= iface->num_altsetting) {
165 		kfree(fp);
166 		kfree(rate_table);
167 		return -EINVAL;
168 	}
169 	alts = &iface->altsetting[fp->altset_idx];
170 	altsd = get_iface_desc(alts);
171 	fp->protocol = altsd->bInterfaceProtocol;
172 
173 	if (fp->datainterval == 0)
174 		fp->datainterval = snd_usb_parse_datainterval(chip, alts);
175 	if (fp->maxpacksize == 0)
176 		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
177 	usb_set_interface(chip->dev, fp->iface, 0);
178 	snd_usb_init_pitch(chip, fp->iface, alts, fp);
179 	snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
180 	return 0;
181 }
182 
183 static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
184 				 struct usb_interface *iface,
185 				 struct usb_driver *driver)
186 {
187 	struct usb_host_interface *alts;
188 	struct usb_interface_descriptor *altsd;
189 	struct usb_endpoint_descriptor *epd;
190 	struct uac1_as_header_descriptor *ashd;
191 	struct uac_format_type_i_discrete_descriptor *fmtd;
192 
193 	/*
194 	 * Most Roland/Yamaha audio streaming interfaces have more or less
195 	 * standard descriptors, but older devices might lack descriptors, and
196 	 * future ones might change, so ensure that we fail silently if the
197 	 * interface doesn't look exactly right.
198 	 */
199 
200 	/* must have a non-zero altsetting for streaming */
201 	if (iface->num_altsetting < 2)
202 		return -ENODEV;
203 	alts = &iface->altsetting[1];
204 	altsd = get_iface_desc(alts);
205 
206 	/* must have an isochronous endpoint for streaming */
207 	if (altsd->bNumEndpoints < 1)
208 		return -ENODEV;
209 	epd = get_endpoint(alts, 0);
210 	if (!usb_endpoint_xfer_isoc(epd))
211 		return -ENODEV;
212 
213 	/* must have format descriptors */
214 	ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
215 				       UAC_AS_GENERAL);
216 	fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
217 				       UAC_FORMAT_TYPE);
218 	if (!ashd || ashd->bLength < 7 ||
219 	    !fmtd || fmtd->bLength < 8)
220 		return -ENODEV;
221 
222 	return create_standard_audio_quirk(chip, iface, driver, NULL);
223 }
224 
225 static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
226 				    struct usb_interface *iface,
227 				    struct usb_driver *driver,
228 				    struct usb_host_interface *alts)
229 {
230 	static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
231 		.type = QUIRK_MIDI_YAMAHA
232 	};
233 	struct usb_midi_in_jack_descriptor *injd;
234 	struct usb_midi_out_jack_descriptor *outjd;
235 
236 	/* must have some valid jack descriptors */
237 	injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
238 				       NULL, USB_MS_MIDI_IN_JACK);
239 	outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
240 					NULL, USB_MS_MIDI_OUT_JACK);
241 	if (!injd && !outjd)
242 		return -ENODEV;
243 	if (injd && (injd->bLength < 5 ||
244 		     (injd->bJackType != USB_MS_EMBEDDED &&
245 		      injd->bJackType != USB_MS_EXTERNAL)))
246 		return -ENODEV;
247 	if (outjd && (outjd->bLength < 6 ||
248 		      (outjd->bJackType != USB_MS_EMBEDDED &&
249 		       outjd->bJackType != USB_MS_EXTERNAL)))
250 		return -ENODEV;
251 	return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
252 }
253 
254 static int create_roland_midi_quirk(struct snd_usb_audio *chip,
255 				    struct usb_interface *iface,
256 				    struct usb_driver *driver,
257 				    struct usb_host_interface *alts)
258 {
259 	static const struct snd_usb_audio_quirk roland_midi_quirk = {
260 		.type = QUIRK_MIDI_ROLAND
261 	};
262 	u8 *roland_desc = NULL;
263 
264 	/* might have a vendor-specific descriptor <06 24 F1 02 ...> */
265 	for (;;) {
266 		roland_desc = snd_usb_find_csint_desc(alts->extra,
267 						      alts->extralen,
268 						      roland_desc, 0xf1);
269 		if (!roland_desc)
270 			return -ENODEV;
271 		if (roland_desc[0] < 6 || roland_desc[3] != 2)
272 			continue;
273 		return create_any_midi_quirk(chip, iface, driver,
274 					     &roland_midi_quirk);
275 	}
276 }
277 
278 static int create_std_midi_quirk(struct snd_usb_audio *chip,
279 				 struct usb_interface *iface,
280 				 struct usb_driver *driver,
281 				 struct usb_host_interface *alts)
282 {
283 	struct usb_ms_header_descriptor *mshd;
284 	struct usb_ms_endpoint_descriptor *msepd;
285 
286 	/* must have the MIDIStreaming interface header descriptor*/
287 	mshd = (struct usb_ms_header_descriptor *)alts->extra;
288 	if (alts->extralen < 7 ||
289 	    mshd->bLength < 7 ||
290 	    mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
291 	    mshd->bDescriptorSubtype != USB_MS_HEADER)
292 		return -ENODEV;
293 	/* must have the MIDIStreaming endpoint descriptor*/
294 	msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
295 	if (alts->endpoint[0].extralen < 4 ||
296 	    msepd->bLength < 4 ||
297 	    msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
298 	    msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
299 	    msepd->bNumEmbMIDIJack < 1 ||
300 	    msepd->bNumEmbMIDIJack > 16)
301 		return -ENODEV;
302 
303 	return create_any_midi_quirk(chip, iface, driver, NULL);
304 }
305 
306 static int create_auto_midi_quirk(struct snd_usb_audio *chip,
307 				  struct usb_interface *iface,
308 				  struct usb_driver *driver)
309 {
310 	struct usb_host_interface *alts;
311 	struct usb_interface_descriptor *altsd;
312 	struct usb_endpoint_descriptor *epd;
313 	int err;
314 
315 	alts = &iface->altsetting[0];
316 	altsd = get_iface_desc(alts);
317 
318 	/* must have at least one bulk/interrupt endpoint for streaming */
319 	if (altsd->bNumEndpoints < 1)
320 		return -ENODEV;
321 	epd = get_endpoint(alts, 0);
322 	if (!usb_endpoint_xfer_bulk(epd) &&
323 	    !usb_endpoint_xfer_int(epd))
324 		return -ENODEV;
325 
326 	switch (USB_ID_VENDOR(chip->usb_id)) {
327 	case 0x0499: /* Yamaha */
328 		err = create_yamaha_midi_quirk(chip, iface, driver, alts);
329 		if (err != -ENODEV)
330 			return err;
331 		break;
332 	case 0x0582: /* Roland */
333 		err = create_roland_midi_quirk(chip, iface, driver, alts);
334 		if (err != -ENODEV)
335 			return err;
336 		break;
337 	}
338 
339 	return create_std_midi_quirk(chip, iface, driver, alts);
340 }
341 
342 static int create_autodetect_quirk(struct snd_usb_audio *chip,
343 				   struct usb_interface *iface,
344 				   struct usb_driver *driver)
345 {
346 	int err;
347 
348 	err = create_auto_pcm_quirk(chip, iface, driver);
349 	if (err == -ENODEV)
350 		err = create_auto_midi_quirk(chip, iface, driver);
351 	return err;
352 }
353 
354 static int create_autodetect_quirks(struct snd_usb_audio *chip,
355 				    struct usb_interface *iface,
356 				    struct usb_driver *driver,
357 				    const struct snd_usb_audio_quirk *quirk)
358 {
359 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
360 	int ifcount, ifnum, err;
361 
362 	err = create_autodetect_quirk(chip, iface, driver);
363 	if (err < 0)
364 		return err;
365 
366 	/*
367 	 * ALSA PCM playback/capture devices cannot be registered in two steps,
368 	 * so we have to claim the other corresponding interface here.
369 	 */
370 	ifcount = chip->dev->actconfig->desc.bNumInterfaces;
371 	for (ifnum = 0; ifnum < ifcount; ifnum++) {
372 		if (ifnum == probed_ifnum || quirk->ifnum >= 0)
373 			continue;
374 		iface = usb_ifnum_to_if(chip->dev, ifnum);
375 		if (!iface ||
376 		    usb_interface_claimed(iface) ||
377 		    get_iface_desc(iface->altsetting)->bInterfaceClass !=
378 							USB_CLASS_VENDOR_SPEC)
379 			continue;
380 
381 		err = create_autodetect_quirk(chip, iface, driver);
382 		if (err >= 0)
383 			usb_driver_claim_interface(driver, iface, (void *)-1L);
384 	}
385 
386 	return 0;
387 }
388 
389 /*
390  * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
391  * The only way to detect the sample rate is by looking at wMaxPacketSize.
392  */
393 static int create_uaxx_quirk(struct snd_usb_audio *chip,
394 			     struct usb_interface *iface,
395 			     struct usb_driver *driver,
396 			     const struct snd_usb_audio_quirk *quirk)
397 {
398 	static const struct audioformat ua_format = {
399 		.formats = SNDRV_PCM_FMTBIT_S24_3LE,
400 		.channels = 2,
401 		.fmt_type = UAC_FORMAT_TYPE_I,
402 		.altsetting = 1,
403 		.altset_idx = 1,
404 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
405 	};
406 	struct usb_host_interface *alts;
407 	struct usb_interface_descriptor *altsd;
408 	struct audioformat *fp;
409 	int stream, err;
410 
411 	/* both PCM and MIDI interfaces have 2 or more altsettings */
412 	if (iface->num_altsetting < 2)
413 		return -ENXIO;
414 	alts = &iface->altsetting[1];
415 	altsd = get_iface_desc(alts);
416 
417 	if (altsd->bNumEndpoints == 2) {
418 		static const struct snd_usb_midi_endpoint_info ua700_ep = {
419 			.out_cables = 0x0003,
420 			.in_cables  = 0x0003
421 		};
422 		static const struct snd_usb_audio_quirk ua700_quirk = {
423 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
424 			.data = &ua700_ep
425 		};
426 		static const struct snd_usb_midi_endpoint_info uaxx_ep = {
427 			.out_cables = 0x0001,
428 			.in_cables  = 0x0001
429 		};
430 		static const struct snd_usb_audio_quirk uaxx_quirk = {
431 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
432 			.data = &uaxx_ep
433 		};
434 		const struct snd_usb_audio_quirk *quirk =
435 			chip->usb_id == USB_ID(0x0582, 0x002b)
436 			? &ua700_quirk : &uaxx_quirk;
437 		return snd_usbmidi_create(chip->card, iface,
438 					  &chip->midi_list, quirk);
439 	}
440 
441 	if (altsd->bNumEndpoints != 1)
442 		return -ENXIO;
443 
444 	fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
445 	if (!fp)
446 		return -ENOMEM;
447 
448 	fp->iface = altsd->bInterfaceNumber;
449 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
450 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
451 	fp->datainterval = 0;
452 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
453 
454 	switch (fp->maxpacksize) {
455 	case 0x120:
456 		fp->rate_max = fp->rate_min = 44100;
457 		break;
458 	case 0x138:
459 	case 0x140:
460 		fp->rate_max = fp->rate_min = 48000;
461 		break;
462 	case 0x258:
463 	case 0x260:
464 		fp->rate_max = fp->rate_min = 96000;
465 		break;
466 	default:
467 		usb_audio_err(chip, "unknown sample rate\n");
468 		kfree(fp);
469 		return -ENXIO;
470 	}
471 
472 	stream = (fp->endpoint & USB_DIR_IN)
473 		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
474 	err = snd_usb_add_audio_stream(chip, stream, fp);
475 	if (err < 0) {
476 		kfree(fp);
477 		return err;
478 	}
479 	usb_set_interface(chip->dev, fp->iface, 0);
480 	return 0;
481 }
482 
483 /*
484  * Create a standard mixer for the specified interface.
485  */
486 static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
487 				       struct usb_interface *iface,
488 				       struct usb_driver *driver,
489 				       const struct snd_usb_audio_quirk *quirk)
490 {
491 	if (quirk->ifnum < 0)
492 		return 0;
493 
494 	return snd_usb_create_mixer(chip, quirk->ifnum, 0);
495 }
496 
497 /*
498  * audio-interface quirks
499  *
500  * returns zero if no standard audio/MIDI parsing is needed.
501  * returns a positive value if standard audio/midi interfaces are parsed
502  * after this.
503  * returns a negative value at error.
504  */
505 int snd_usb_create_quirk(struct snd_usb_audio *chip,
506 			 struct usb_interface *iface,
507 			 struct usb_driver *driver,
508 			 const struct snd_usb_audio_quirk *quirk)
509 {
510 	typedef int (*quirk_func_t)(struct snd_usb_audio *,
511 				    struct usb_interface *,
512 				    struct usb_driver *,
513 				    const struct snd_usb_audio_quirk *);
514 	static const quirk_func_t quirk_funcs[] = {
515 		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
516 		[QUIRK_COMPOSITE] = create_composite_quirk,
517 		[QUIRK_AUTODETECT] = create_autodetect_quirks,
518 		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
519 		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
520 		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
521 		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
522 		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
523 		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
524 		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
525 		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
526 		[QUIRK_MIDI_CME] = create_any_midi_quirk,
527 		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
528 		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
529 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
530 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
531 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
532 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
533 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
534 	};
535 
536 	if (quirk->type < QUIRK_TYPE_COUNT) {
537 		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
538 	} else {
539 		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
540 		return -ENXIO;
541 	}
542 }
543 
544 /*
545  * boot quirks
546  */
547 
548 #define EXTIGY_FIRMWARE_SIZE_OLD 794
549 #define EXTIGY_FIRMWARE_SIZE_NEW 483
550 
551 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
552 {
553 	struct usb_host_config *config = dev->actconfig;
554 	int err;
555 
556 	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
557 	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
558 		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
559 		/* Send message to force it to reconnect with full interface. */
560 		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
561 				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
562 		if (err < 0)
563 			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
564 		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
565 				&dev->descriptor, sizeof(dev->descriptor));
566 		config = dev->actconfig;
567 		if (err < 0)
568 			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
569 		err = usb_reset_configuration(dev);
570 		if (err < 0)
571 			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
572 		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
573 			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
574 		return -ENODEV; /* quit this anyway */
575 	}
576 	return 0;
577 }
578 
579 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
580 {
581 	u8 buf = 1;
582 
583 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
584 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
585 			0, 0, &buf, 1);
586 	if (buf == 0) {
587 		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
588 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
589 				1, 2000, NULL, 0);
590 		return -ENODEV;
591 	}
592 	return 0;
593 }
594 
595 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
596 {
597 	int err;
598 
599 	if (dev->actconfig->desc.bConfigurationValue == 1) {
600 		dev_info(&dev->dev,
601 			   "Fast Track Pro switching to config #2\n");
602 		/* This function has to be available by the usb core module.
603 		 * if it is not avialable the boot quirk has to be left out
604 		 * and the configuration has to be set by udev or hotplug
605 		 * rules
606 		 */
607 		err = usb_driver_set_configuration(dev, 2);
608 		if (err < 0)
609 			dev_dbg(&dev->dev,
610 				"error usb_driver_set_configuration: %d\n",
611 				err);
612 		/* Always return an error, so that we stop creating a device
613 		   that will just be destroyed and recreated with a new
614 		   configuration */
615 		return -ENODEV;
616 	} else
617 		dev_info(&dev->dev, "Fast Track Pro config OK\n");
618 
619 	return 0;
620 }
621 
622 /*
623  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
624  * documented in the device's data sheet.
625  */
626 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
627 {
628 	u8 buf[4];
629 	buf[0] = 0x20;
630 	buf[1] = value & 0xff;
631 	buf[2] = (value >> 8) & 0xff;
632 	buf[3] = reg;
633 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
634 			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
635 			       0, 0, &buf, 4);
636 }
637 
638 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
639 {
640 	/*
641 	 * Enable line-out driver mode, set headphone source to front
642 	 * channels, enable stereo mic.
643 	 */
644 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
645 }
646 
647 /*
648  * C-Media CM6206 is based on CM106 with two additional
649  * registers that are not documented in the data sheet.
650  * Values here are chosen based on sniffing USB traffic
651  * under Windows.
652  */
653 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
654 {
655 	int err  = 0, reg;
656 	int val[] = {0x2004, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
657 
658 	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
659 		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
660 		if (err < 0)
661 			return err;
662 	}
663 
664 	return err;
665 }
666 
667 /* quirk for Plantronics GameCom 780 with CM6302 chip */
668 static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
669 {
670 	/* set the initial volume and don't change; other values are either
671 	 * too loud or silent due to firmware bug (bko#65251)
672 	 */
673 	u8 buf[2] = { 0x74, 0xe3 };
674 	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
675 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
676 			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
677 }
678 
679 /*
680  * Novation Twitch DJ controller
681  * Focusrite Novation Saffire 6 USB audio card
682  */
683 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
684 {
685 	/* preemptively set up the device because otherwise the
686 	 * raw MIDI endpoints are not active */
687 	usb_set_interface(dev, 0, 1);
688 	return 0;
689 }
690 
691 /*
692  * This call will put the synth in "USB send" mode, i.e it will send MIDI
693  * messages through USB (this is disabled at startup). The synth will
694  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
695  * sign on its LCD. Values here are chosen based on sniffing USB traffic
696  * under Windows.
697  */
698 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
699 {
700 	int err, actual_length;
701 
702 	/* "midi send" enable */
703 	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
704 
705 	void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
706 	if (!buf)
707 		return -ENOMEM;
708 	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
709 			ARRAY_SIZE(seq), &actual_length, 1000);
710 	kfree(buf);
711 	if (err < 0)
712 		return err;
713 
714 	return 0;
715 }
716 
717 /*
718  * Some sound cards from Native Instruments are in fact compliant to the USB
719  * audio standard of version 2 and other approved USB standards, even though
720  * they come up as vendor-specific device when first connected.
721  *
722  * However, they can be told to come up with a new set of descriptors
723  * upon their next enumeration, and the interfaces announced by the new
724  * descriptors will then be handled by the kernel's class drivers. As the
725  * product ID will also change, no further checks are required.
726  */
727 
728 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
729 {
730 	int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
731 				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
732 				  1, 0, NULL, 0, 1000);
733 
734 	if (ret < 0)
735 		return ret;
736 
737 	usb_reset_device(dev);
738 
739 	/* return -EAGAIN, so the creation of an audio interface for this
740 	 * temporary device is aborted. The device will reconnect with a
741 	 * new product ID */
742 	return -EAGAIN;
743 }
744 
745 static void mbox2_setup_48_24_magic(struct usb_device *dev)
746 {
747 	u8 srate[3];
748 	u8 temp[12];
749 
750 	/* Choose 48000Hz permanently */
751 	srate[0] = 0x80;
752 	srate[1] = 0xbb;
753 	srate[2] = 0x00;
754 
755 	/* Send the magic! */
756 	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
757 		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
758 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
759 		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
760 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
761 		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
762 	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
763 		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
764 	return;
765 }
766 
767 /* Digidesign Mbox 2 needs to load firmware onboard
768  * and driver must wait a few seconds for initialisation.
769  */
770 
771 #define MBOX2_FIRMWARE_SIZE    646
772 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
773 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
774 
775 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
776 {
777 	struct usb_host_config *config = dev->actconfig;
778 	int err;
779 	u8 bootresponse[0x12];
780 	int fwsize;
781 	int count;
782 
783 	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
784 
785 	if (fwsize != MBOX2_FIRMWARE_SIZE) {
786 		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
787 		return -ENODEV;
788 	}
789 
790 	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");
791 
792 	count = 0;
793 	bootresponse[0] = MBOX2_BOOT_LOADING;
794 	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
795 		msleep(500); /* 0.5 second delay */
796 		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
797 			/* Control magic - load onboard firmware */
798 			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
799 		if (bootresponse[0] == MBOX2_BOOT_READY)
800 			break;
801 		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
802 		count++;
803 	}
804 
805 	if (bootresponse[0] != MBOX2_BOOT_READY) {
806 		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
807 		return -ENODEV;
808 	}
809 
810 	dev_dbg(&dev->dev, "device initialised!\n");
811 
812 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
813 		&dev->descriptor, sizeof(dev->descriptor));
814 	config = dev->actconfig;
815 	if (err < 0)
816 		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
817 
818 	err = usb_reset_configuration(dev);
819 	if (err < 0)
820 		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
821 	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
822 		le16_to_cpu(get_cfg_desc(config)->wTotalLength));
823 
824 	mbox2_setup_48_24_magic(dev);
825 
826 	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");
827 
828 	return 0; /* Successful boot */
829 }
830 
831 /*
832  * Setup quirks
833  */
834 #define MAUDIO_SET		0x01 /* parse device_setup */
835 #define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
836 #define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
837 #define MAUDIO_SET_96K		0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
838 #define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
839 #define MAUDIO_SET_DI		0x10 /* enable Digital Input */
840 #define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
841 #define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48KHz+Digital Input */
842 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
843 #define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48KHz+Digital Input */
844 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */
845 
846 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
847 				      int iface, int altno)
848 {
849 	/* Reset ALL ifaces to 0 altsetting.
850 	 * Call it for every possible altsetting of every interface.
851 	 */
852 	usb_set_interface(chip->dev, iface, 0);
853 	if (chip->setup & MAUDIO_SET) {
854 		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
855 			if (iface != 1 && iface != 2)
856 				return 1; /* skip all interfaces but 1 and 2 */
857 		} else {
858 			unsigned int mask;
859 			if (iface == 1 || iface == 2)
860 				return 1; /* skip interfaces 1 and 2 */
861 			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
862 				return 1; /* skip this altsetting */
863 			mask = chip->setup & MAUDIO_SET_MASK;
864 			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
865 				return 1; /* skip this altsetting */
866 			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
867 				return 1; /* skip this altsetting */
868 			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
869 				return 1; /* skip this altsetting */
870 		}
871 	}
872 	usb_audio_dbg(chip,
873 		    "using altsetting %d for interface %d config %d\n",
874 		    altno, iface, chip->setup);
875 	return 0; /* keep this altsetting */
876 }
877 
878 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
879 					 int iface,
880 					 int altno)
881 {
882 	/* Reset ALL ifaces to 0 altsetting.
883 	 * Call it for every possible altsetting of every interface.
884 	 */
885 	usb_set_interface(chip->dev, iface, 0);
886 
887 	if (chip->setup & MAUDIO_SET) {
888 		unsigned int mask;
889 		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
890 			return 1; /* skip this altsetting */
891 		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
892 			return 1; /* skip this altsetting */
893 		mask = chip->setup & MAUDIO_SET_MASK;
894 		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
895 			return 1; /* skip this altsetting */
896 		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
897 			return 1; /* skip this altsetting */
898 		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
899 			return 1; /* skip this altsetting */
900 		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
901 			return 1; /* skip this altsetting */
902 	}
903 
904 	return 0; /* keep this altsetting */
905 }
906 
907 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
908 					   int iface, int altno)
909 {
910 	/* Reset ALL ifaces to 0 altsetting.
911 	 * Call it for every possible altsetting of every interface.
912 	 */
913 	usb_set_interface(chip->dev, iface, 0);
914 
915 	/* possible configuration where both inputs and only one output is
916 	 *used is not supported by the current setup
917 	 */
918 	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
919 		if (chip->setup & MAUDIO_SET_96K) {
920 			if (altno != 3 && altno != 6)
921 				return 1;
922 		} else if (chip->setup & MAUDIO_SET_DI) {
923 			if (iface == 4)
924 				return 1; /* no analog input */
925 			if (altno != 2 && altno != 5)
926 				return 1; /* enable only altsets 2 and 5 */
927 		} else {
928 			if (iface == 5)
929 				return 1; /* disable digialt input */
930 			if (altno != 2 && altno != 5)
931 				return 1; /* enalbe only altsets 2 and 5 */
932 		}
933 	} else {
934 		/* keep only 16-Bit mode */
935 		if (altno != 1)
936 			return 1;
937 	}
938 
939 	usb_audio_dbg(chip,
940 		    "using altsetting %d for interface %d config %d\n",
941 		    altno, iface, chip->setup);
942 	return 0; /* keep this altsetting */
943 }
944 
945 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
946 				  int iface,
947 				  int altno)
948 {
949 	/* audiophile usb: skip altsets incompatible with device_setup */
950 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
951 		return audiophile_skip_setting_quirk(chip, iface, altno);
952 	/* quattro usb: skip altsets incompatible with device_setup */
953 	if (chip->usb_id == USB_ID(0x0763, 0x2001))
954 		return quattro_skip_setting_quirk(chip, iface, altno);
955 	/* fasttrackpro usb: skip altsets incompatible with device_setup */
956 	if (chip->usb_id == USB_ID(0x0763, 0x2012))
957 		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
958 
959 	return 0;
960 }
961 
962 int snd_usb_apply_boot_quirk(struct usb_device *dev,
963 			     struct usb_interface *intf,
964 			     const struct snd_usb_audio_quirk *quirk)
965 {
966 	u32 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
967 			le16_to_cpu(dev->descriptor.idProduct));
968 
969 	switch (id) {
970 	case USB_ID(0x041e, 0x3000):
971 		/* SB Extigy needs special boot-up sequence */
972 		/* if more models come, this will go to the quirk list. */
973 		return snd_usb_extigy_boot_quirk(dev, intf);
974 
975 	case USB_ID(0x041e, 0x3020):
976 		/* SB Audigy 2 NX needs its own boot-up magic, too */
977 		return snd_usb_audigy2nx_boot_quirk(dev);
978 
979 	case USB_ID(0x10f5, 0x0200):
980 		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
981 		return snd_usb_cm106_boot_quirk(dev);
982 
983 	case USB_ID(0x0d8c, 0x0102):
984 		/* C-Media CM6206 / CM106-Like Sound Device */
985 	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
986 		return snd_usb_cm6206_boot_quirk(dev);
987 
988 	case USB_ID(0x0dba, 0x3000):
989 		/* Digidesign Mbox 2 */
990 		return snd_usb_mbox2_boot_quirk(dev);
991 
992 	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
993 	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
994 		return snd_usb_novation_boot_quirk(dev);
995 
996 	case USB_ID(0x133e, 0x0815):
997 		/* Access Music VirusTI Desktop */
998 		return snd_usb_accessmusic_boot_quirk(dev);
999 
1000 	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
1001 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
1002 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
1003 		return snd_usb_nativeinstruments_boot_quirk(dev);
1004 	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1005 		return snd_usb_fasttrackpro_boot_quirk(dev);
1006 	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
1007 		return snd_usb_gamecon780_boot_quirk(dev);
1008 	}
1009 
1010 	return 0;
1011 }
1012 
1013 /*
1014  * check if the device uses big-endian samples
1015  */
1016 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1017 {
1018 	/* it depends on altsetting whether the device is big-endian or not */
1019 	switch (chip->usb_id) {
1020 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1021 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1022 			fp->altsetting == 5 || fp->altsetting == 6)
1023 			return 1;
1024 		break;
1025 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1026 		if (chip->setup == 0x00 ||
1027 			fp->altsetting == 1 || fp->altsetting == 2 ||
1028 			fp->altsetting == 3)
1029 			return 1;
1030 		break;
1031 	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1032 		if (fp->altsetting == 2 || fp->altsetting == 3 ||
1033 			fp->altsetting == 5 || fp->altsetting == 6)
1034 			return 1;
1035 		break;
1036 	}
1037 	return 0;
1038 }
1039 
1040 /*
1041  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1042  * not for interface.
1043  */
1044 
1045 enum {
1046 	EMU_QUIRK_SR_44100HZ = 0,
1047 	EMU_QUIRK_SR_48000HZ,
1048 	EMU_QUIRK_SR_88200HZ,
1049 	EMU_QUIRK_SR_96000HZ,
1050 	EMU_QUIRK_SR_176400HZ,
1051 	EMU_QUIRK_SR_192000HZ
1052 };
1053 
1054 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1055 				 struct audioformat *fmt)
1056 {
1057 	unsigned char emu_samplerate_id = 0;
1058 
1059 	/* When capture is active
1060 	 * sample rate shouldn't be changed
1061 	 * by playback substream
1062 	 */
1063 	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1064 		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1065 			return;
1066 	}
1067 
1068 	switch (fmt->rate_min) {
1069 	case 48000:
1070 		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1071 		break;
1072 	case 88200:
1073 		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1074 		break;
1075 	case 96000:
1076 		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1077 		break;
1078 	case 176400:
1079 		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1080 		break;
1081 	case 192000:
1082 		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1083 		break;
1084 	default:
1085 		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1086 		break;
1087 	}
1088 	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1089 	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1090 }
1091 
1092 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1093 			      struct audioformat *fmt)
1094 {
1095 	switch (subs->stream->chip->usb_id) {
1096 	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1097 	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1098 	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1099 	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1100 		set_format_emu_quirk(subs, fmt);
1101 		break;
1102 	}
1103 }
1104 
1105 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1106 {
1107 	/*
1108 	 * "Playback Design" products send bogus feedback data at the start
1109 	 * of the stream. Ignore them.
1110 	 */
1111 	if ((le16_to_cpu(ep->chip->dev->descriptor.idVendor) == 0x23ba) &&
1112 	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1113 		ep->skip_packets = 4;
1114 
1115 	/*
1116 	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1117 	 * world latency varies by approx. +/- 50 frames (at 96KHz) each time
1118 	 * the stream is (re)started. When skipping packets 16 at endpoint
1119 	 * start up, the real world latency is stable within +/- 1 frame (also
1120 	 * across power cycles).
1121 	 */
1122 	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1123 	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1124 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1125 		ep->skip_packets = 16;
1126 }
1127 
1128 void snd_usb_set_interface_quirk(struct usb_device *dev)
1129 {
1130 	/*
1131 	 * "Playback Design" products need a 50ms delay after setting the
1132 	 * USB interface.
1133 	 */
1134 	if (le16_to_cpu(dev->descriptor.idVendor) == 0x23ba)
1135 		mdelay(50);
1136 }
1137 
1138 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1139 			   __u8 request, __u8 requesttype, __u16 value,
1140 			   __u16 index, void *data, __u16 size)
1141 {
1142 	/*
1143 	 * "Playback Design" products need a 20ms delay after each
1144 	 * class compliant request
1145 	 */
1146 	if ((le16_to_cpu(dev->descriptor.idVendor) == 0x23ba) &&
1147 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1148 		mdelay(20);
1149 }
1150 
1151 /*
1152  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1153  * augment the PCM format bit-field for DSD types. The UAC standards
1154  * don't have a designated bit field to denote DSD-capable interfaces,
1155  * hence all hardware that is known to support this format has to be
1156  * listed here.
1157  */
1158 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1159 					struct audioformat *fp,
1160 					unsigned int sample_bytes)
1161 {
1162 	/* Playback Designs */
1163 	if (le16_to_cpu(chip->dev->descriptor.idVendor) == 0x23ba) {
1164 		switch (fp->altsetting) {
1165 		case 1:
1166 			fp->dsd_dop = true;
1167 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1168 		case 2:
1169 			fp->dsd_bitrev = true;
1170 			return SNDRV_PCM_FMTBIT_DSD_U8;
1171 		case 3:
1172 			fp->dsd_bitrev = true;
1173 			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1174 		}
1175 	}
1176 
1177 	/* XMOS based USB DACs */
1178 	switch (chip->usb_id) {
1179 	/* iFi Audio micro/nano iDSD */
1180 	case USB_ID(0x20b1, 0x3008):
1181 		if (fp->altsetting == 2)
1182 			return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1183 		break;
1184 	/* DIYINHK DSD DXD 384kHz USB to I2S/DSD */
1185 	case USB_ID(0x20b1, 0x2009):
1186 		if (fp->altsetting == 3)
1187 			return SNDRV_PCM_FMTBIT_DSD_U32_LE;
1188 		break;
1189 	default:
1190 		break;
1191 	}
1192 
1193 	return 0;
1194 }
1195