xref: /openbmc/linux/sound/usb/mixer_quirks.c (revision e6f45ea2)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *   USB Audio Driver for ALSA
4  *
5  *   Quirks and vendor-specific extensions for mixer interfaces
6  *
7  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8  *
9  *   Many codes borrowed from audio.c by
10  *	    Alan Cox (alan@lxorguk.ukuu.org.uk)
11  *	    Thomas Sailer (sailer@ife.ee.ethz.ch)
12  *
13  *   Audio Advantage Micro II support added by:
14  *	    Przemek Rudy (prudy1@o2.pl)
15  */
16 
17 #include <linux/hid.h>
18 #include <linux/init.h>
19 #include <linux/math64.h>
20 #include <linux/slab.h>
21 #include <linux/usb.h>
22 #include <linux/usb/audio.h>
23 
24 #include <sound/asoundef.h>
25 #include <sound/core.h>
26 #include <sound/control.h>
27 #include <sound/hwdep.h>
28 #include <sound/info.h>
29 #include <sound/tlv.h>
30 
31 #include "usbaudio.h"
32 #include "mixer.h"
33 #include "mixer_quirks.h"
34 #include "mixer_scarlett.h"
35 #include "mixer_scarlett_gen2.h"
36 #include "mixer_us16x08.h"
37 #include "helper.h"
38 
39 struct std_mono_table {
40 	unsigned int unitid, control, cmask;
41 	int val_type;
42 	const char *name;
43 	snd_kcontrol_tlv_rw_t *tlv_callback;
44 };
45 
46 /* This function allows for the creation of standard UAC controls.
47  * See the quirks for M-Audio FTUs or Ebox-44.
48  * If you don't want to set a TLV callback pass NULL.
49  *
50  * Since there doesn't seem to be a devices that needs a multichannel
51  * version, we keep it mono for simplicity.
52  */
53 static int snd_create_std_mono_ctl_offset(struct usb_mixer_interface *mixer,
54 				unsigned int unitid,
55 				unsigned int control,
56 				unsigned int cmask,
57 				int val_type,
58 				unsigned int idx_off,
59 				const char *name,
60 				snd_kcontrol_tlv_rw_t *tlv_callback)
61 {
62 	struct usb_mixer_elem_info *cval;
63 	struct snd_kcontrol *kctl;
64 
65 	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
66 	if (!cval)
67 		return -ENOMEM;
68 
69 	snd_usb_mixer_elem_init_std(&cval->head, mixer, unitid);
70 	cval->val_type = val_type;
71 	cval->channels = 1;
72 	cval->control = control;
73 	cval->cmask = cmask;
74 	cval->idx_off = idx_off;
75 
76 	/* get_min_max() is called only for integer volumes later,
77 	 * so provide a short-cut for booleans */
78 	cval->min = 0;
79 	cval->max = 1;
80 	cval->res = 0;
81 	cval->dBmin = 0;
82 	cval->dBmax = 0;
83 
84 	/* Create control */
85 	kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);
86 	if (!kctl) {
87 		kfree(cval);
88 		return -ENOMEM;
89 	}
90 
91 	/* Set name */
92 	snprintf(kctl->id.name, sizeof(kctl->id.name), name);
93 	kctl->private_free = snd_usb_mixer_elem_free;
94 
95 	/* set TLV */
96 	if (tlv_callback) {
97 		kctl->tlv.c = tlv_callback;
98 		kctl->vd[0].access |=
99 			SNDRV_CTL_ELEM_ACCESS_TLV_READ |
100 			SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
101 	}
102 	/* Add control to mixer */
103 	return snd_usb_mixer_add_control(&cval->head, kctl);
104 }
105 
106 static int snd_create_std_mono_ctl(struct usb_mixer_interface *mixer,
107 				unsigned int unitid,
108 				unsigned int control,
109 				unsigned int cmask,
110 				int val_type,
111 				const char *name,
112 				snd_kcontrol_tlv_rw_t *tlv_callback)
113 {
114 	return snd_create_std_mono_ctl_offset(mixer, unitid, control, cmask,
115 		val_type, 0 /* Offset */, name, tlv_callback);
116 }
117 
118 /*
119  * Create a set of standard UAC controls from a table
120  */
121 static int snd_create_std_mono_table(struct usb_mixer_interface *mixer,
122 				struct std_mono_table *t)
123 {
124 	int err;
125 
126 	while (t->name != NULL) {
127 		err = snd_create_std_mono_ctl(mixer, t->unitid, t->control,
128 				t->cmask, t->val_type, t->name, t->tlv_callback);
129 		if (err < 0)
130 			return err;
131 		t++;
132 	}
133 
134 	return 0;
135 }
136 
137 static int add_single_ctl_with_resume(struct usb_mixer_interface *mixer,
138 				      int id,
139 				      usb_mixer_elem_resume_func_t resume,
140 				      const struct snd_kcontrol_new *knew,
141 				      struct usb_mixer_elem_list **listp)
142 {
143 	struct usb_mixer_elem_list *list;
144 	struct snd_kcontrol *kctl;
145 
146 	list = kzalloc(sizeof(*list), GFP_KERNEL);
147 	if (!list)
148 		return -ENOMEM;
149 	if (listp)
150 		*listp = list;
151 	list->mixer = mixer;
152 	list->id = id;
153 	list->resume = resume;
154 	kctl = snd_ctl_new1(knew, list);
155 	if (!kctl) {
156 		kfree(list);
157 		return -ENOMEM;
158 	}
159 	kctl->private_free = snd_usb_mixer_elem_free;
160 	return snd_usb_mixer_add_control(list, kctl);
161 }
162 
163 /*
164  * Sound Blaster remote control configuration
165  *
166  * format of remote control data:
167  * Extigy:       xx 00
168  * Audigy 2 NX:  06 80 xx 00 00 00
169  * Live! 24-bit: 06 80 xx yy 22 83
170  */
171 static const struct rc_config {
172 	u32 usb_id;
173 	u8  offset;
174 	u8  length;
175 	u8  packet_length;
176 	u8  min_packet_length; /* minimum accepted length of the URB result */
177 	u8  mute_mixer_id;
178 	u32 mute_code;
179 } rc_configs[] = {
180 	{ USB_ID(0x041e, 0x3000), 0, 1, 2, 1,  18, 0x0013 }, /* Extigy       */
181 	{ USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
182 	{ USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
183 	{ USB_ID(0x041e, 0x3042), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 */
184 	{ USB_ID(0x041e, 0x30df), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
185 	{ USB_ID(0x041e, 0x3237), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
186 	{ USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
187 };
188 
189 static void snd_usb_soundblaster_remote_complete(struct urb *urb)
190 {
191 	struct usb_mixer_interface *mixer = urb->context;
192 	const struct rc_config *rc = mixer->rc_cfg;
193 	u32 code;
194 
195 	if (urb->status < 0 || urb->actual_length < rc->min_packet_length)
196 		return;
197 
198 	code = mixer->rc_buffer[rc->offset];
199 	if (rc->length == 2)
200 		code |= mixer->rc_buffer[rc->offset + 1] << 8;
201 
202 	/* the Mute button actually changes the mixer control */
203 	if (code == rc->mute_code)
204 		snd_usb_mixer_notify_id(mixer, rc->mute_mixer_id);
205 	mixer->rc_code = code;
206 	wmb();
207 	wake_up(&mixer->rc_waitq);
208 }
209 
210 static long snd_usb_sbrc_hwdep_read(struct snd_hwdep *hw, char __user *buf,
211 				     long count, loff_t *offset)
212 {
213 	struct usb_mixer_interface *mixer = hw->private_data;
214 	int err;
215 	u32 rc_code;
216 
217 	if (count != 1 && count != 4)
218 		return -EINVAL;
219 	err = wait_event_interruptible(mixer->rc_waitq,
220 				       (rc_code = xchg(&mixer->rc_code, 0)) != 0);
221 	if (err == 0) {
222 		if (count == 1)
223 			err = put_user(rc_code, buf);
224 		else
225 			err = put_user(rc_code, (u32 __user *)buf);
226 	}
227 	return err < 0 ? err : count;
228 }
229 
230 static __poll_t snd_usb_sbrc_hwdep_poll(struct snd_hwdep *hw, struct file *file,
231 					    poll_table *wait)
232 {
233 	struct usb_mixer_interface *mixer = hw->private_data;
234 
235 	poll_wait(file, &mixer->rc_waitq, wait);
236 	return mixer->rc_code ? EPOLLIN | EPOLLRDNORM : 0;
237 }
238 
239 static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
240 {
241 	struct snd_hwdep *hwdep;
242 	int err, len, i;
243 
244 	for (i = 0; i < ARRAY_SIZE(rc_configs); ++i)
245 		if (rc_configs[i].usb_id == mixer->chip->usb_id)
246 			break;
247 	if (i >= ARRAY_SIZE(rc_configs))
248 		return 0;
249 	mixer->rc_cfg = &rc_configs[i];
250 
251 	len = mixer->rc_cfg->packet_length;
252 
253 	init_waitqueue_head(&mixer->rc_waitq);
254 	err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
255 	if (err < 0)
256 		return err;
257 	snprintf(hwdep->name, sizeof(hwdep->name),
258 		 "%s remote control", mixer->chip->card->shortname);
259 	hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
260 	hwdep->private_data = mixer;
261 	hwdep->ops.read = snd_usb_sbrc_hwdep_read;
262 	hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
263 	hwdep->exclusive = 1;
264 
265 	mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
266 	if (!mixer->rc_urb)
267 		return -ENOMEM;
268 	mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
269 	if (!mixer->rc_setup_packet) {
270 		usb_free_urb(mixer->rc_urb);
271 		mixer->rc_urb = NULL;
272 		return -ENOMEM;
273 	}
274 	mixer->rc_setup_packet->bRequestType =
275 		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
276 	mixer->rc_setup_packet->bRequest = UAC_GET_MEM;
277 	mixer->rc_setup_packet->wValue = cpu_to_le16(0);
278 	mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
279 	mixer->rc_setup_packet->wLength = cpu_to_le16(len);
280 	usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
281 			     usb_rcvctrlpipe(mixer->chip->dev, 0),
282 			     (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
283 			     snd_usb_soundblaster_remote_complete, mixer);
284 	return 0;
285 }
286 
287 #define snd_audigy2nx_led_info		snd_ctl_boolean_mono_info
288 
289 static int snd_audigy2nx_led_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
290 {
291 	ucontrol->value.integer.value[0] = kcontrol->private_value >> 8;
292 	return 0;
293 }
294 
295 static int snd_audigy2nx_led_update(struct usb_mixer_interface *mixer,
296 				    int value, int index)
297 {
298 	struct snd_usb_audio *chip = mixer->chip;
299 	int err;
300 
301 	err = snd_usb_lock_shutdown(chip);
302 	if (err < 0)
303 		return err;
304 
305 	if (chip->usb_id == USB_ID(0x041e, 0x3042))
306 		err = snd_usb_ctl_msg(chip->dev,
307 			      usb_sndctrlpipe(chip->dev, 0), 0x24,
308 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
309 			      !value, 0, NULL, 0);
310 	/* USB X-Fi S51 Pro */
311 	if (chip->usb_id == USB_ID(0x041e, 0x30df))
312 		err = snd_usb_ctl_msg(chip->dev,
313 			      usb_sndctrlpipe(chip->dev, 0), 0x24,
314 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
315 			      !value, 0, NULL, 0);
316 	else
317 		err = snd_usb_ctl_msg(chip->dev,
318 			      usb_sndctrlpipe(chip->dev, 0), 0x24,
319 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
320 			      value, index + 2, NULL, 0);
321 	snd_usb_unlock_shutdown(chip);
322 	return err;
323 }
324 
325 static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol,
326 				 struct snd_ctl_elem_value *ucontrol)
327 {
328 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
329 	struct usb_mixer_interface *mixer = list->mixer;
330 	int index = kcontrol->private_value & 0xff;
331 	unsigned int value = ucontrol->value.integer.value[0];
332 	int old_value = kcontrol->private_value >> 8;
333 	int err;
334 
335 	if (value > 1)
336 		return -EINVAL;
337 	if (value == old_value)
338 		return 0;
339 	kcontrol->private_value = (value << 8) | index;
340 	err = snd_audigy2nx_led_update(mixer, value, index);
341 	return err < 0 ? err : 1;
342 }
343 
344 static int snd_audigy2nx_led_resume(struct usb_mixer_elem_list *list)
345 {
346 	int priv_value = list->kctl->private_value;
347 
348 	return snd_audigy2nx_led_update(list->mixer, priv_value >> 8,
349 					priv_value & 0xff);
350 }
351 
352 /* name and private_value are set dynamically */
353 static const struct snd_kcontrol_new snd_audigy2nx_control = {
354 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
355 	.info = snd_audigy2nx_led_info,
356 	.get = snd_audigy2nx_led_get,
357 	.put = snd_audigy2nx_led_put,
358 };
359 
360 static const char * const snd_audigy2nx_led_names[] = {
361 	"CMSS LED Switch",
362 	"Power LED Switch",
363 	"Dolby Digital LED Switch",
364 };
365 
366 static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
367 {
368 	int i, err;
369 
370 	for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_led_names); ++i) {
371 		struct snd_kcontrol_new knew;
372 
373 		/* USB X-Fi S51 doesn't have a CMSS LED */
374 		if ((mixer->chip->usb_id == USB_ID(0x041e, 0x3042)) && i == 0)
375 			continue;
376 		/* USB X-Fi S51 Pro doesn't have one either */
377 		if ((mixer->chip->usb_id == USB_ID(0x041e, 0x30df)) && i == 0)
378 			continue;
379 		if (i > 1 && /* Live24ext has 2 LEDs only */
380 			(mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
381 			 mixer->chip->usb_id == USB_ID(0x041e, 0x3042) ||
382 			 mixer->chip->usb_id == USB_ID(0x041e, 0x30df) ||
383 			 mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
384 			break;
385 
386 		knew = snd_audigy2nx_control;
387 		knew.name = snd_audigy2nx_led_names[i];
388 		knew.private_value = (1 << 8) | i; /* LED on as default */
389 		err = add_single_ctl_with_resume(mixer, 0,
390 						 snd_audigy2nx_led_resume,
391 						 &knew, NULL);
392 		if (err < 0)
393 			return err;
394 	}
395 	return 0;
396 }
397 
398 static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,
399 				    struct snd_info_buffer *buffer)
400 {
401 	static const struct sb_jack {
402 		int unitid;
403 		const char *name;
404 	}  jacks_audigy2nx[] = {
405 		{4,  "dig in "},
406 		{7,  "line in"},
407 		{19, "spk out"},
408 		{20, "hph out"},
409 		{-1, NULL}
410 	}, jacks_live24ext[] = {
411 		{4,  "line in"}, /* &1=Line, &2=Mic*/
412 		{3,  "hph out"}, /* headphones */
413 		{0,  "RC     "}, /* last command, 6 bytes see rc_config above */
414 		{-1, NULL}
415 	};
416 	const struct sb_jack *jacks;
417 	struct usb_mixer_interface *mixer = entry->private_data;
418 	int i, err;
419 	u8 buf[3];
420 
421 	snd_iprintf(buffer, "%s jacks\n\n", mixer->chip->card->shortname);
422 	if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020))
423 		jacks = jacks_audigy2nx;
424 	else if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
425 		 mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
426 		jacks = jacks_live24ext;
427 	else
428 		return;
429 
430 	for (i = 0; jacks[i].name; ++i) {
431 		snd_iprintf(buffer, "%s: ", jacks[i].name);
432 		err = snd_usb_lock_shutdown(mixer->chip);
433 		if (err < 0)
434 			return;
435 		err = snd_usb_ctl_msg(mixer->chip->dev,
436 				      usb_rcvctrlpipe(mixer->chip->dev, 0),
437 				      UAC_GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
438 				      USB_RECIP_INTERFACE, 0,
439 				      jacks[i].unitid << 8, buf, 3);
440 		snd_usb_unlock_shutdown(mixer->chip);
441 		if (err == 3 && (buf[0] == 3 || buf[0] == 6))
442 			snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
443 		else
444 			snd_iprintf(buffer, "?\n");
445 	}
446 }
447 
448 /* EMU0204 */
449 static int snd_emu0204_ch_switch_info(struct snd_kcontrol *kcontrol,
450 				      struct snd_ctl_elem_info *uinfo)
451 {
452 	static const char * const texts[2] = {"1/2", "3/4"};
453 
454 	return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
455 }
456 
457 static int snd_emu0204_ch_switch_get(struct snd_kcontrol *kcontrol,
458 				     struct snd_ctl_elem_value *ucontrol)
459 {
460 	ucontrol->value.enumerated.item[0] = kcontrol->private_value;
461 	return 0;
462 }
463 
464 static int snd_emu0204_ch_switch_update(struct usb_mixer_interface *mixer,
465 					int value)
466 {
467 	struct snd_usb_audio *chip = mixer->chip;
468 	int err;
469 	unsigned char buf[2];
470 
471 	err = snd_usb_lock_shutdown(chip);
472 	if (err < 0)
473 		return err;
474 
475 	buf[0] = 0x01;
476 	buf[1] = value ? 0x02 : 0x01;
477 	err = snd_usb_ctl_msg(chip->dev,
478 		      usb_sndctrlpipe(chip->dev, 0), UAC_SET_CUR,
479 		      USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
480 		      0x0400, 0x0e00, buf, 2);
481 	snd_usb_unlock_shutdown(chip);
482 	return err;
483 }
484 
485 static int snd_emu0204_ch_switch_put(struct snd_kcontrol *kcontrol,
486 				     struct snd_ctl_elem_value *ucontrol)
487 {
488 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
489 	struct usb_mixer_interface *mixer = list->mixer;
490 	unsigned int value = ucontrol->value.enumerated.item[0];
491 	int err;
492 
493 	if (value > 1)
494 		return -EINVAL;
495 
496 	if (value == kcontrol->private_value)
497 		return 0;
498 
499 	kcontrol->private_value = value;
500 	err = snd_emu0204_ch_switch_update(mixer, value);
501 	return err < 0 ? err : 1;
502 }
503 
504 static int snd_emu0204_ch_switch_resume(struct usb_mixer_elem_list *list)
505 {
506 	return snd_emu0204_ch_switch_update(list->mixer,
507 					    list->kctl->private_value);
508 }
509 
510 static struct snd_kcontrol_new snd_emu0204_control = {
511 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
512 	.name = "Front Jack Channels",
513 	.info = snd_emu0204_ch_switch_info,
514 	.get = snd_emu0204_ch_switch_get,
515 	.put = snd_emu0204_ch_switch_put,
516 	.private_value = 0,
517 };
518 
519 static int snd_emu0204_controls_create(struct usb_mixer_interface *mixer)
520 {
521 	return add_single_ctl_with_resume(mixer, 0,
522 					  snd_emu0204_ch_switch_resume,
523 					  &snd_emu0204_control, NULL);
524 }
525 
526 /* ASUS Xonar U1 / U3 controls */
527 
528 static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol,
529 				   struct snd_ctl_elem_value *ucontrol)
530 {
531 	ucontrol->value.integer.value[0] = !!(kcontrol->private_value & 0x02);
532 	return 0;
533 }
534 
535 static int snd_xonar_u1_switch_update(struct usb_mixer_interface *mixer,
536 				      unsigned char status)
537 {
538 	struct snd_usb_audio *chip = mixer->chip;
539 	int err;
540 
541 	err = snd_usb_lock_shutdown(chip);
542 	if (err < 0)
543 		return err;
544 	err = snd_usb_ctl_msg(chip->dev,
545 			      usb_sndctrlpipe(chip->dev, 0), 0x08,
546 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
547 			      50, 0, &status, 1);
548 	snd_usb_unlock_shutdown(chip);
549 	return err;
550 }
551 
552 static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
553 				   struct snd_ctl_elem_value *ucontrol)
554 {
555 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
556 	u8 old_status, new_status;
557 	int err;
558 
559 	old_status = kcontrol->private_value;
560 	if (ucontrol->value.integer.value[0])
561 		new_status = old_status | 0x02;
562 	else
563 		new_status = old_status & ~0x02;
564 	if (new_status == old_status)
565 		return 0;
566 
567 	kcontrol->private_value = new_status;
568 	err = snd_xonar_u1_switch_update(list->mixer, new_status);
569 	return err < 0 ? err : 1;
570 }
571 
572 static int snd_xonar_u1_switch_resume(struct usb_mixer_elem_list *list)
573 {
574 	return snd_xonar_u1_switch_update(list->mixer,
575 					  list->kctl->private_value);
576 }
577 
578 static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
579 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
580 	.name = "Digital Playback Switch",
581 	.info = snd_ctl_boolean_mono_info,
582 	.get = snd_xonar_u1_switch_get,
583 	.put = snd_xonar_u1_switch_put,
584 	.private_value = 0x05,
585 };
586 
587 static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
588 {
589 	return add_single_ctl_with_resume(mixer, 0,
590 					  snd_xonar_u1_switch_resume,
591 					  &snd_xonar_u1_output_switch, NULL);
592 }
593 
594 /* Digidesign Mbox 1 clock source switch (internal/spdif) */
595 
596 static int snd_mbox1_switch_get(struct snd_kcontrol *kctl,
597 				struct snd_ctl_elem_value *ucontrol)
598 {
599 	ucontrol->value.enumerated.item[0] = kctl->private_value;
600 	return 0;
601 }
602 
603 static int snd_mbox1_switch_update(struct usb_mixer_interface *mixer, int val)
604 {
605 	struct snd_usb_audio *chip = mixer->chip;
606 	int err;
607 	unsigned char buff[3];
608 
609 	err = snd_usb_lock_shutdown(chip);
610 	if (err < 0)
611 		return err;
612 
613 	/* Prepare for magic command to toggle clock source */
614 	err = snd_usb_ctl_msg(chip->dev,
615 				usb_rcvctrlpipe(chip->dev, 0), 0x81,
616 				USB_DIR_IN |
617 				USB_TYPE_CLASS |
618 				USB_RECIP_INTERFACE, 0x00, 0x500, buff, 1);
619 	if (err < 0)
620 		goto err;
621 	err = snd_usb_ctl_msg(chip->dev,
622 				usb_rcvctrlpipe(chip->dev, 0), 0x81,
623 				USB_DIR_IN |
624 				USB_TYPE_CLASS |
625 				USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
626 	if (err < 0)
627 		goto err;
628 
629 	/* 2 possibilities:	Internal    -> send sample rate
630 	 *			S/PDIF sync -> send zeroes
631 	 * NB: Sample rate locked to 48kHz on purpose to
632 	 *     prevent user from resetting the sample rate
633 	 *     while S/PDIF sync is enabled and confusing
634 	 *     this configuration.
635 	 */
636 	if (val == 0) {
637 		buff[0] = 0x80;
638 		buff[1] = 0xbb;
639 		buff[2] = 0x00;
640 	} else {
641 		buff[0] = buff[1] = buff[2] = 0x00;
642 	}
643 
644 	/* Send the magic command to toggle the clock source */
645 	err = snd_usb_ctl_msg(chip->dev,
646 				usb_sndctrlpipe(chip->dev, 0), 0x1,
647 				USB_TYPE_CLASS |
648 				USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
649 	if (err < 0)
650 		goto err;
651 	err = snd_usb_ctl_msg(chip->dev,
652 				usb_rcvctrlpipe(chip->dev, 0), 0x81,
653 				USB_DIR_IN |
654 				USB_TYPE_CLASS |
655 				USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
656 	if (err < 0)
657 		goto err;
658 	err = snd_usb_ctl_msg(chip->dev,
659 				usb_rcvctrlpipe(chip->dev, 0), 0x81,
660 				USB_DIR_IN |
661 				USB_TYPE_CLASS |
662 				USB_RECIP_ENDPOINT, 0x100, 0x2, buff, 3);
663 	if (err < 0)
664 		goto err;
665 
666 err:
667 	snd_usb_unlock_shutdown(chip);
668 	return err;
669 }
670 
671 static int snd_mbox1_switch_put(struct snd_kcontrol *kctl,
672 				struct snd_ctl_elem_value *ucontrol)
673 {
674 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
675 	struct usb_mixer_interface *mixer = list->mixer;
676 	int err;
677 	bool cur_val, new_val;
678 
679 	cur_val = kctl->private_value;
680 	new_val = ucontrol->value.enumerated.item[0];
681 	if (cur_val == new_val)
682 		return 0;
683 
684 	kctl->private_value = new_val;
685 	err = snd_mbox1_switch_update(mixer, new_val);
686 	return err < 0 ? err : 1;
687 }
688 
689 static int snd_mbox1_switch_info(struct snd_kcontrol *kcontrol,
690 				 struct snd_ctl_elem_info *uinfo)
691 {
692 	static const char *const texts[2] = {
693 		"Internal",
694 		"S/PDIF"
695 	};
696 
697 	return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
698 }
699 
700 static int snd_mbox1_switch_resume(struct usb_mixer_elem_list *list)
701 {
702 	return snd_mbox1_switch_update(list->mixer, list->kctl->private_value);
703 }
704 
705 static struct snd_kcontrol_new snd_mbox1_switch = {
706 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
707 	.name = "Clock Source",
708 	.index = 0,
709 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
710 	.info = snd_mbox1_switch_info,
711 	.get = snd_mbox1_switch_get,
712 	.put = snd_mbox1_switch_put,
713 	.private_value = 0
714 };
715 
716 static int snd_mbox1_create_sync_switch(struct usb_mixer_interface *mixer)
717 {
718 	return add_single_ctl_with_resume(mixer, 0,
719 					  snd_mbox1_switch_resume,
720 					  &snd_mbox1_switch, NULL);
721 }
722 
723 /* Native Instruments device quirks */
724 
725 #define _MAKE_NI_CONTROL(bRequest,wIndex) ((bRequest) << 16 | (wIndex))
726 
727 static int snd_ni_control_init_val(struct usb_mixer_interface *mixer,
728 				   struct snd_kcontrol *kctl)
729 {
730 	struct usb_device *dev = mixer->chip->dev;
731 	unsigned int pval = kctl->private_value;
732 	u8 value;
733 	int err;
734 
735 	err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
736 			      (pval >> 16) & 0xff,
737 			      USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
738 			      0, pval & 0xffff, &value, 1);
739 	if (err < 0) {
740 		dev_err(&dev->dev,
741 			"unable to issue vendor read request (ret = %d)", err);
742 		return err;
743 	}
744 
745 	kctl->private_value |= ((unsigned int)value << 24);
746 	return 0;
747 }
748 
749 static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
750 					     struct snd_ctl_elem_value *ucontrol)
751 {
752 	ucontrol->value.integer.value[0] = kcontrol->private_value >> 24;
753 	return 0;
754 }
755 
756 static int snd_ni_update_cur_val(struct usb_mixer_elem_list *list)
757 {
758 	struct snd_usb_audio *chip = list->mixer->chip;
759 	unsigned int pval = list->kctl->private_value;
760 	int err;
761 
762 	err = snd_usb_lock_shutdown(chip);
763 	if (err < 0)
764 		return err;
765 	err = usb_control_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
766 			      (pval >> 16) & 0xff,
767 			      USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
768 			      pval >> 24, pval & 0xffff, NULL, 0, 1000);
769 	snd_usb_unlock_shutdown(chip);
770 	return err;
771 }
772 
773 static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
774 					     struct snd_ctl_elem_value *ucontrol)
775 {
776 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
777 	u8 oldval = (kcontrol->private_value >> 24) & 0xff;
778 	u8 newval = ucontrol->value.integer.value[0];
779 	int err;
780 
781 	if (oldval == newval)
782 		return 0;
783 
784 	kcontrol->private_value &= ~(0xff << 24);
785 	kcontrol->private_value |= (unsigned int)newval << 24;
786 	err = snd_ni_update_cur_val(list);
787 	return err < 0 ? err : 1;
788 }
789 
790 static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
791 	{
792 		.name = "Direct Thru Channel A",
793 		.private_value = _MAKE_NI_CONTROL(0x01, 0x03),
794 	},
795 	{
796 		.name = "Direct Thru Channel B",
797 		.private_value = _MAKE_NI_CONTROL(0x01, 0x05),
798 	},
799 	{
800 		.name = "Phono Input Channel A",
801 		.private_value = _MAKE_NI_CONTROL(0x02, 0x03),
802 	},
803 	{
804 		.name = "Phono Input Channel B",
805 		.private_value = _MAKE_NI_CONTROL(0x02, 0x05),
806 	},
807 };
808 
809 static struct snd_kcontrol_new snd_nativeinstruments_ta10_mixers[] = {
810 	{
811 		.name = "Direct Thru Channel A",
812 		.private_value = _MAKE_NI_CONTROL(0x01, 0x03),
813 	},
814 	{
815 		.name = "Direct Thru Channel B",
816 		.private_value = _MAKE_NI_CONTROL(0x01, 0x05),
817 	},
818 	{
819 		.name = "Direct Thru Channel C",
820 		.private_value = _MAKE_NI_CONTROL(0x01, 0x07),
821 	},
822 	{
823 		.name = "Direct Thru Channel D",
824 		.private_value = _MAKE_NI_CONTROL(0x01, 0x09),
825 	},
826 	{
827 		.name = "Phono Input Channel A",
828 		.private_value = _MAKE_NI_CONTROL(0x02, 0x03),
829 	},
830 	{
831 		.name = "Phono Input Channel B",
832 		.private_value = _MAKE_NI_CONTROL(0x02, 0x05),
833 	},
834 	{
835 		.name = "Phono Input Channel C",
836 		.private_value = _MAKE_NI_CONTROL(0x02, 0x07),
837 	},
838 	{
839 		.name = "Phono Input Channel D",
840 		.private_value = _MAKE_NI_CONTROL(0x02, 0x09),
841 	},
842 };
843 
844 static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
845 					      const struct snd_kcontrol_new *kc,
846 					      unsigned int count)
847 {
848 	int i, err = 0;
849 	struct snd_kcontrol_new template = {
850 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
851 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
852 		.get = snd_nativeinstruments_control_get,
853 		.put = snd_nativeinstruments_control_put,
854 		.info = snd_ctl_boolean_mono_info,
855 	};
856 
857 	for (i = 0; i < count; i++) {
858 		struct usb_mixer_elem_list *list;
859 
860 		template.name = kc[i].name;
861 		template.private_value = kc[i].private_value;
862 
863 		err = add_single_ctl_with_resume(mixer, 0,
864 						 snd_ni_update_cur_val,
865 						 &template, &list);
866 		if (err < 0)
867 			break;
868 		snd_ni_control_init_val(mixer, list->kctl);
869 	}
870 
871 	return err;
872 }
873 
874 /* M-Audio FastTrack Ultra quirks */
875 /* FTU Effect switch (also used by C400/C600) */
876 static int snd_ftu_eff_switch_info(struct snd_kcontrol *kcontrol,
877 					struct snd_ctl_elem_info *uinfo)
878 {
879 	static const char *const texts[8] = {
880 		"Room 1", "Room 2", "Room 3", "Hall 1",
881 		"Hall 2", "Plate", "Delay", "Echo"
882 	};
883 
884 	return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
885 }
886 
887 static int snd_ftu_eff_switch_init(struct usb_mixer_interface *mixer,
888 				   struct snd_kcontrol *kctl)
889 {
890 	struct usb_device *dev = mixer->chip->dev;
891 	unsigned int pval = kctl->private_value;
892 	int err;
893 	unsigned char value[2];
894 
895 	value[0] = 0x00;
896 	value[1] = 0x00;
897 
898 	err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
899 			      USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
900 			      pval & 0xff00,
901 			      snd_usb_ctrl_intf(mixer->chip) | ((pval & 0xff) << 8),
902 			      value, 2);
903 	if (err < 0)
904 		return err;
905 
906 	kctl->private_value |= (unsigned int)value[0] << 24;
907 	return 0;
908 }
909 
910 static int snd_ftu_eff_switch_get(struct snd_kcontrol *kctl,
911 					struct snd_ctl_elem_value *ucontrol)
912 {
913 	ucontrol->value.enumerated.item[0] = kctl->private_value >> 24;
914 	return 0;
915 }
916 
917 static int snd_ftu_eff_switch_update(struct usb_mixer_elem_list *list)
918 {
919 	struct snd_usb_audio *chip = list->mixer->chip;
920 	unsigned int pval = list->kctl->private_value;
921 	unsigned char value[2];
922 	int err;
923 
924 	value[0] = pval >> 24;
925 	value[1] = 0;
926 
927 	err = snd_usb_lock_shutdown(chip);
928 	if (err < 0)
929 		return err;
930 	err = snd_usb_ctl_msg(chip->dev,
931 			      usb_sndctrlpipe(chip->dev, 0),
932 			      UAC_SET_CUR,
933 			      USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
934 			      pval & 0xff00,
935 			      snd_usb_ctrl_intf(chip) | ((pval & 0xff) << 8),
936 			      value, 2);
937 	snd_usb_unlock_shutdown(chip);
938 	return err;
939 }
940 
941 static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
942 					struct snd_ctl_elem_value *ucontrol)
943 {
944 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
945 	unsigned int pval = list->kctl->private_value;
946 	int cur_val, err, new_val;
947 
948 	cur_val = pval >> 24;
949 	new_val = ucontrol->value.enumerated.item[0];
950 	if (cur_val == new_val)
951 		return 0;
952 
953 	kctl->private_value &= ~(0xff << 24);
954 	kctl->private_value |= new_val << 24;
955 	err = snd_ftu_eff_switch_update(list);
956 	return err < 0 ? err : 1;
957 }
958 
959 static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
960 	int validx, int bUnitID)
961 {
962 	static struct snd_kcontrol_new template = {
963 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
964 		.name = "Effect Program Switch",
965 		.index = 0,
966 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
967 		.info = snd_ftu_eff_switch_info,
968 		.get = snd_ftu_eff_switch_get,
969 		.put = snd_ftu_eff_switch_put
970 	};
971 	struct usb_mixer_elem_list *list;
972 	int err;
973 
974 	err = add_single_ctl_with_resume(mixer, bUnitID,
975 					 snd_ftu_eff_switch_update,
976 					 &template, &list);
977 	if (err < 0)
978 		return err;
979 	list->kctl->private_value = (validx << 8) | bUnitID;
980 	snd_ftu_eff_switch_init(mixer, list->kctl);
981 	return 0;
982 }
983 
984 /* Create volume controls for FTU devices*/
985 static int snd_ftu_create_volume_ctls(struct usb_mixer_interface *mixer)
986 {
987 	char name[64];
988 	unsigned int control, cmask;
989 	int in, out, err;
990 
991 	const unsigned int id = 5;
992 	const int val_type = USB_MIXER_S16;
993 
994 	for (out = 0; out < 8; out++) {
995 		control = out + 1;
996 		for (in = 0; in < 8; in++) {
997 			cmask = 1 << in;
998 			snprintf(name, sizeof(name),
999 				"AIn%d - Out%d Capture Volume",
1000 				in  + 1, out + 1);
1001 			err = snd_create_std_mono_ctl(mixer, id, control,
1002 							cmask, val_type, name,
1003 							&snd_usb_mixer_vol_tlv);
1004 			if (err < 0)
1005 				return err;
1006 		}
1007 		for (in = 8; in < 16; in++) {
1008 			cmask = 1 << in;
1009 			snprintf(name, sizeof(name),
1010 				"DIn%d - Out%d Playback Volume",
1011 				in - 7, out + 1);
1012 			err = snd_create_std_mono_ctl(mixer, id, control,
1013 							cmask, val_type, name,
1014 							&snd_usb_mixer_vol_tlv);
1015 			if (err < 0)
1016 				return err;
1017 		}
1018 	}
1019 
1020 	return 0;
1021 }
1022 
1023 /* This control needs a volume quirk, see mixer.c */
1024 static int snd_ftu_create_effect_volume_ctl(struct usb_mixer_interface *mixer)
1025 {
1026 	static const char name[] = "Effect Volume";
1027 	const unsigned int id = 6;
1028 	const int val_type = USB_MIXER_U8;
1029 	const unsigned int control = 2;
1030 	const unsigned int cmask = 0;
1031 
1032 	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1033 					name, snd_usb_mixer_vol_tlv);
1034 }
1035 
1036 /* This control needs a volume quirk, see mixer.c */
1037 static int snd_ftu_create_effect_duration_ctl(struct usb_mixer_interface *mixer)
1038 {
1039 	static const char name[] = "Effect Duration";
1040 	const unsigned int id = 6;
1041 	const int val_type = USB_MIXER_S16;
1042 	const unsigned int control = 3;
1043 	const unsigned int cmask = 0;
1044 
1045 	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1046 					name, snd_usb_mixer_vol_tlv);
1047 }
1048 
1049 /* This control needs a volume quirk, see mixer.c */
1050 static int snd_ftu_create_effect_feedback_ctl(struct usb_mixer_interface *mixer)
1051 {
1052 	static const char name[] = "Effect Feedback Volume";
1053 	const unsigned int id = 6;
1054 	const int val_type = USB_MIXER_U8;
1055 	const unsigned int control = 4;
1056 	const unsigned int cmask = 0;
1057 
1058 	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1059 					name, NULL);
1060 }
1061 
1062 static int snd_ftu_create_effect_return_ctls(struct usb_mixer_interface *mixer)
1063 {
1064 	unsigned int cmask;
1065 	int err, ch;
1066 	char name[48];
1067 
1068 	const unsigned int id = 7;
1069 	const int val_type = USB_MIXER_S16;
1070 	const unsigned int control = 7;
1071 
1072 	for (ch = 0; ch < 4; ++ch) {
1073 		cmask = 1 << ch;
1074 		snprintf(name, sizeof(name),
1075 			"Effect Return %d Volume", ch + 1);
1076 		err = snd_create_std_mono_ctl(mixer, id, control,
1077 						cmask, val_type, name,
1078 						snd_usb_mixer_vol_tlv);
1079 		if (err < 0)
1080 			return err;
1081 	}
1082 
1083 	return 0;
1084 }
1085 
1086 static int snd_ftu_create_effect_send_ctls(struct usb_mixer_interface *mixer)
1087 {
1088 	unsigned int  cmask;
1089 	int err, ch;
1090 	char name[48];
1091 
1092 	const unsigned int id = 5;
1093 	const int val_type = USB_MIXER_S16;
1094 	const unsigned int control = 9;
1095 
1096 	for (ch = 0; ch < 8; ++ch) {
1097 		cmask = 1 << ch;
1098 		snprintf(name, sizeof(name),
1099 			"Effect Send AIn%d Volume", ch + 1);
1100 		err = snd_create_std_mono_ctl(mixer, id, control, cmask,
1101 						val_type, name,
1102 						snd_usb_mixer_vol_tlv);
1103 		if (err < 0)
1104 			return err;
1105 	}
1106 	for (ch = 8; ch < 16; ++ch) {
1107 		cmask = 1 << ch;
1108 		snprintf(name, sizeof(name),
1109 			"Effect Send DIn%d Volume", ch - 7);
1110 		err = snd_create_std_mono_ctl(mixer, id, control, cmask,
1111 						val_type, name,
1112 						snd_usb_mixer_vol_tlv);
1113 		if (err < 0)
1114 			return err;
1115 	}
1116 	return 0;
1117 }
1118 
1119 static int snd_ftu_create_mixer(struct usb_mixer_interface *mixer)
1120 {
1121 	int err;
1122 
1123 	err = snd_ftu_create_volume_ctls(mixer);
1124 	if (err < 0)
1125 		return err;
1126 
1127 	err = snd_ftu_create_effect_switch(mixer, 1, 6);
1128 	if (err < 0)
1129 		return err;
1130 
1131 	err = snd_ftu_create_effect_volume_ctl(mixer);
1132 	if (err < 0)
1133 		return err;
1134 
1135 	err = snd_ftu_create_effect_duration_ctl(mixer);
1136 	if (err < 0)
1137 		return err;
1138 
1139 	err = snd_ftu_create_effect_feedback_ctl(mixer);
1140 	if (err < 0)
1141 		return err;
1142 
1143 	err = snd_ftu_create_effect_return_ctls(mixer);
1144 	if (err < 0)
1145 		return err;
1146 
1147 	err = snd_ftu_create_effect_send_ctls(mixer);
1148 	if (err < 0)
1149 		return err;
1150 
1151 	return 0;
1152 }
1153 
1154 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
1155 			       unsigned char samplerate_id)
1156 {
1157 	struct usb_mixer_interface *mixer;
1158 	struct usb_mixer_elem_info *cval;
1159 	int unitid = 12; /* SampleRate ExtensionUnit ID */
1160 
1161 	list_for_each_entry(mixer, &chip->mixer_list, list) {
1162 		if (mixer->id_elems[unitid]) {
1163 			cval = mixer_elem_list_to_info(mixer->id_elems[unitid]);
1164 			snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR,
1165 						    cval->control << 8,
1166 						    samplerate_id);
1167 			snd_usb_mixer_notify_id(mixer, unitid);
1168 			break;
1169 		}
1170 	}
1171 }
1172 
1173 /* M-Audio Fast Track C400/C600 */
1174 /* C400/C600 volume controls, this control needs a volume quirk, see mixer.c */
1175 static int snd_c400_create_vol_ctls(struct usb_mixer_interface *mixer)
1176 {
1177 	char name[64];
1178 	unsigned int cmask, offset;
1179 	int out, chan, err;
1180 	int num_outs = 0;
1181 	int num_ins = 0;
1182 
1183 	const unsigned int id = 0x40;
1184 	const int val_type = USB_MIXER_S16;
1185 	const int control = 1;
1186 
1187 	switch (mixer->chip->usb_id) {
1188 	case USB_ID(0x0763, 0x2030):
1189 		num_outs = 6;
1190 		num_ins = 4;
1191 		break;
1192 	case USB_ID(0x0763, 0x2031):
1193 		num_outs = 8;
1194 		num_ins = 6;
1195 		break;
1196 	}
1197 
1198 	for (chan = 0; chan < num_outs + num_ins; chan++) {
1199 		for (out = 0; out < num_outs; out++) {
1200 			if (chan < num_outs) {
1201 				snprintf(name, sizeof(name),
1202 					"PCM%d-Out%d Playback Volume",
1203 					chan + 1, out + 1);
1204 			} else {
1205 				snprintf(name, sizeof(name),
1206 					"In%d-Out%d Playback Volume",
1207 					chan - num_outs + 1, out + 1);
1208 			}
1209 
1210 			cmask = (out == 0) ? 0 : 1 << (out - 1);
1211 			offset = chan * num_outs;
1212 			err = snd_create_std_mono_ctl_offset(mixer, id, control,
1213 						cmask, val_type, offset, name,
1214 						&snd_usb_mixer_vol_tlv);
1215 			if (err < 0)
1216 				return err;
1217 		}
1218 	}
1219 
1220 	return 0;
1221 }
1222 
1223 /* This control needs a volume quirk, see mixer.c */
1224 static int snd_c400_create_effect_volume_ctl(struct usb_mixer_interface *mixer)
1225 {
1226 	static const char name[] = "Effect Volume";
1227 	const unsigned int id = 0x43;
1228 	const int val_type = USB_MIXER_U8;
1229 	const unsigned int control = 3;
1230 	const unsigned int cmask = 0;
1231 
1232 	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1233 					name, snd_usb_mixer_vol_tlv);
1234 }
1235 
1236 /* This control needs a volume quirk, see mixer.c */
1237 static int snd_c400_create_effect_duration_ctl(struct usb_mixer_interface *mixer)
1238 {
1239 	static const char name[] = "Effect Duration";
1240 	const unsigned int id = 0x43;
1241 	const int val_type = USB_MIXER_S16;
1242 	const unsigned int control = 4;
1243 	const unsigned int cmask = 0;
1244 
1245 	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1246 					name, snd_usb_mixer_vol_tlv);
1247 }
1248 
1249 /* This control needs a volume quirk, see mixer.c */
1250 static int snd_c400_create_effect_feedback_ctl(struct usb_mixer_interface *mixer)
1251 {
1252 	static const char name[] = "Effect Feedback Volume";
1253 	const unsigned int id = 0x43;
1254 	const int val_type = USB_MIXER_U8;
1255 	const unsigned int control = 5;
1256 	const unsigned int cmask = 0;
1257 
1258 	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1259 					name, NULL);
1260 }
1261 
1262 static int snd_c400_create_effect_vol_ctls(struct usb_mixer_interface *mixer)
1263 {
1264 	char name[64];
1265 	unsigned int cmask;
1266 	int chan, err;
1267 	int num_outs = 0;
1268 	int num_ins = 0;
1269 
1270 	const unsigned int id = 0x42;
1271 	const int val_type = USB_MIXER_S16;
1272 	const int control = 1;
1273 
1274 	switch (mixer->chip->usb_id) {
1275 	case USB_ID(0x0763, 0x2030):
1276 		num_outs = 6;
1277 		num_ins = 4;
1278 		break;
1279 	case USB_ID(0x0763, 0x2031):
1280 		num_outs = 8;
1281 		num_ins = 6;
1282 		break;
1283 	}
1284 
1285 	for (chan = 0; chan < num_outs + num_ins; chan++) {
1286 		if (chan < num_outs) {
1287 			snprintf(name, sizeof(name),
1288 				"Effect Send DOut%d",
1289 				chan + 1);
1290 		} else {
1291 			snprintf(name, sizeof(name),
1292 				"Effect Send AIn%d",
1293 				chan - num_outs + 1);
1294 		}
1295 
1296 		cmask = (chan == 0) ? 0 : 1 << (chan - 1);
1297 		err = snd_create_std_mono_ctl(mixer, id, control,
1298 						cmask, val_type, name,
1299 						&snd_usb_mixer_vol_tlv);
1300 		if (err < 0)
1301 			return err;
1302 	}
1303 
1304 	return 0;
1305 }
1306 
1307 static int snd_c400_create_effect_ret_vol_ctls(struct usb_mixer_interface *mixer)
1308 {
1309 	char name[64];
1310 	unsigned int cmask;
1311 	int chan, err;
1312 	int num_outs = 0;
1313 	int offset = 0;
1314 
1315 	const unsigned int id = 0x40;
1316 	const int val_type = USB_MIXER_S16;
1317 	const int control = 1;
1318 
1319 	switch (mixer->chip->usb_id) {
1320 	case USB_ID(0x0763, 0x2030):
1321 		num_outs = 6;
1322 		offset = 0x3c;
1323 		/* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
1324 		break;
1325 	case USB_ID(0x0763, 0x2031):
1326 		num_outs = 8;
1327 		offset = 0x70;
1328 		/* { 0x70, 0x79, 0x72, 0x7b, 0x74, 0x7d, 0x76, 0x7f } */
1329 		break;
1330 	}
1331 
1332 	for (chan = 0; chan < num_outs; chan++) {
1333 		snprintf(name, sizeof(name),
1334 			"Effect Return %d",
1335 			chan + 1);
1336 
1337 		cmask = (chan == 0) ? 0 :
1338 			1 << (chan + (chan % 2) * num_outs - 1);
1339 		err = snd_create_std_mono_ctl_offset(mixer, id, control,
1340 						cmask, val_type, offset, name,
1341 						&snd_usb_mixer_vol_tlv);
1342 		if (err < 0)
1343 			return err;
1344 	}
1345 
1346 	return 0;
1347 }
1348 
1349 static int snd_c400_create_mixer(struct usb_mixer_interface *mixer)
1350 {
1351 	int err;
1352 
1353 	err = snd_c400_create_vol_ctls(mixer);
1354 	if (err < 0)
1355 		return err;
1356 
1357 	err = snd_c400_create_effect_vol_ctls(mixer);
1358 	if (err < 0)
1359 		return err;
1360 
1361 	err = snd_c400_create_effect_ret_vol_ctls(mixer);
1362 	if (err < 0)
1363 		return err;
1364 
1365 	err = snd_ftu_create_effect_switch(mixer, 2, 0x43);
1366 	if (err < 0)
1367 		return err;
1368 
1369 	err = snd_c400_create_effect_volume_ctl(mixer);
1370 	if (err < 0)
1371 		return err;
1372 
1373 	err = snd_c400_create_effect_duration_ctl(mixer);
1374 	if (err < 0)
1375 		return err;
1376 
1377 	err = snd_c400_create_effect_feedback_ctl(mixer);
1378 	if (err < 0)
1379 		return err;
1380 
1381 	return 0;
1382 }
1383 
1384 /*
1385  * The mixer units for Ebox-44 are corrupt, and even where they
1386  * are valid they presents mono controls as L and R channels of
1387  * stereo. So we provide a good mixer here.
1388  */
1389 static struct std_mono_table ebox44_table[] = {
1390 	{
1391 		.unitid = 4,
1392 		.control = 1,
1393 		.cmask = 0x0,
1394 		.val_type = USB_MIXER_INV_BOOLEAN,
1395 		.name = "Headphone Playback Switch"
1396 	},
1397 	{
1398 		.unitid = 4,
1399 		.control = 2,
1400 		.cmask = 0x1,
1401 		.val_type = USB_MIXER_S16,
1402 		.name = "Headphone A Mix Playback Volume"
1403 	},
1404 	{
1405 		.unitid = 4,
1406 		.control = 2,
1407 		.cmask = 0x2,
1408 		.val_type = USB_MIXER_S16,
1409 		.name = "Headphone B Mix Playback Volume"
1410 	},
1411 
1412 	{
1413 		.unitid = 7,
1414 		.control = 1,
1415 		.cmask = 0x0,
1416 		.val_type = USB_MIXER_INV_BOOLEAN,
1417 		.name = "Output Playback Switch"
1418 	},
1419 	{
1420 		.unitid = 7,
1421 		.control = 2,
1422 		.cmask = 0x1,
1423 		.val_type = USB_MIXER_S16,
1424 		.name = "Output A Playback Volume"
1425 	},
1426 	{
1427 		.unitid = 7,
1428 		.control = 2,
1429 		.cmask = 0x2,
1430 		.val_type = USB_MIXER_S16,
1431 		.name = "Output B Playback Volume"
1432 	},
1433 
1434 	{
1435 		.unitid = 10,
1436 		.control = 1,
1437 		.cmask = 0x0,
1438 		.val_type = USB_MIXER_INV_BOOLEAN,
1439 		.name = "Input Capture Switch"
1440 	},
1441 	{
1442 		.unitid = 10,
1443 		.control = 2,
1444 		.cmask = 0x1,
1445 		.val_type = USB_MIXER_S16,
1446 		.name = "Input A Capture Volume"
1447 	},
1448 	{
1449 		.unitid = 10,
1450 		.control = 2,
1451 		.cmask = 0x2,
1452 		.val_type = USB_MIXER_S16,
1453 		.name = "Input B Capture Volume"
1454 	},
1455 
1456 	{}
1457 };
1458 
1459 /* Audio Advantage Micro II findings:
1460  *
1461  * Mapping spdif AES bits to vendor register.bit:
1462  * AES0: [0 0 0 0 2.3 2.2 2.1 2.0] - default 0x00
1463  * AES1: [3.3 3.2.3.1.3.0 2.7 2.6 2.5 2.4] - default: 0x01
1464  * AES2: [0 0 0 0 0 0 0 0]
1465  * AES3: [0 0 0 0 0 0 x 0] - 'x' bit is set basing on standard usb request
1466  *                           (UAC_EP_CS_ATTR_SAMPLE_RATE) for Audio Devices
1467  *
1468  * power on values:
1469  * r2: 0x10
1470  * r3: 0x20 (b7 is zeroed just before playback (except IEC61937) and set
1471  *           just after it to 0xa0, presumably it disables/mutes some analog
1472  *           parts when there is no audio.)
1473  * r9: 0x28
1474  *
1475  * Optical transmitter on/off:
1476  * vendor register.bit: 9.1
1477  * 0 - on (0x28 register value)
1478  * 1 - off (0x2a register value)
1479  *
1480  */
1481 static int snd_microii_spdif_info(struct snd_kcontrol *kcontrol,
1482 	struct snd_ctl_elem_info *uinfo)
1483 {
1484 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
1485 	uinfo->count = 1;
1486 	return 0;
1487 }
1488 
1489 static int snd_microii_spdif_default_get(struct snd_kcontrol *kcontrol,
1490 	struct snd_ctl_elem_value *ucontrol)
1491 {
1492 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1493 	struct snd_usb_audio *chip = list->mixer->chip;
1494 	int err;
1495 	struct usb_interface *iface;
1496 	struct usb_host_interface *alts;
1497 	unsigned int ep;
1498 	unsigned char data[3];
1499 	int rate;
1500 
1501 	err = snd_usb_lock_shutdown(chip);
1502 	if (err < 0)
1503 		return err;
1504 
1505 	ucontrol->value.iec958.status[0] = kcontrol->private_value & 0xff;
1506 	ucontrol->value.iec958.status[1] = (kcontrol->private_value >> 8) & 0xff;
1507 	ucontrol->value.iec958.status[2] = 0x00;
1508 
1509 	/* use known values for that card: interface#1 altsetting#1 */
1510 	iface = usb_ifnum_to_if(chip->dev, 1);
1511 	if (!iface || iface->num_altsetting < 2)
1512 		return -EINVAL;
1513 	alts = &iface->altsetting[1];
1514 	if (get_iface_desc(alts)->bNumEndpoints < 1)
1515 		return -EINVAL;
1516 	ep = get_endpoint(alts, 0)->bEndpointAddress;
1517 
1518 	err = snd_usb_ctl_msg(chip->dev,
1519 			usb_rcvctrlpipe(chip->dev, 0),
1520 			UAC_GET_CUR,
1521 			USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN,
1522 			UAC_EP_CS_ATTR_SAMPLE_RATE << 8,
1523 			ep,
1524 			data,
1525 			sizeof(data));
1526 	if (err < 0)
1527 		goto end;
1528 
1529 	rate = data[0] | (data[1] << 8) | (data[2] << 16);
1530 	ucontrol->value.iec958.status[3] = (rate == 48000) ?
1531 			IEC958_AES3_CON_FS_48000 : IEC958_AES3_CON_FS_44100;
1532 
1533 	err = 0;
1534  end:
1535 	snd_usb_unlock_shutdown(chip);
1536 	return err;
1537 }
1538 
1539 static int snd_microii_spdif_default_update(struct usb_mixer_elem_list *list)
1540 {
1541 	struct snd_usb_audio *chip = list->mixer->chip;
1542 	unsigned int pval = list->kctl->private_value;
1543 	u8 reg;
1544 	int err;
1545 
1546 	err = snd_usb_lock_shutdown(chip);
1547 	if (err < 0)
1548 		return err;
1549 
1550 	reg = ((pval >> 4) & 0xf0) | (pval & 0x0f);
1551 	err = snd_usb_ctl_msg(chip->dev,
1552 			usb_sndctrlpipe(chip->dev, 0),
1553 			UAC_SET_CUR,
1554 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1555 			reg,
1556 			2,
1557 			NULL,
1558 			0);
1559 	if (err < 0)
1560 		goto end;
1561 
1562 	reg = (pval & IEC958_AES0_NONAUDIO) ? 0xa0 : 0x20;
1563 	reg |= (pval >> 12) & 0x0f;
1564 	err = snd_usb_ctl_msg(chip->dev,
1565 			usb_sndctrlpipe(chip->dev, 0),
1566 			UAC_SET_CUR,
1567 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1568 			reg,
1569 			3,
1570 			NULL,
1571 			0);
1572 	if (err < 0)
1573 		goto end;
1574 
1575  end:
1576 	snd_usb_unlock_shutdown(chip);
1577 	return err;
1578 }
1579 
1580 static int snd_microii_spdif_default_put(struct snd_kcontrol *kcontrol,
1581 	struct snd_ctl_elem_value *ucontrol)
1582 {
1583 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1584 	unsigned int pval, pval_old;
1585 	int err;
1586 
1587 	pval = pval_old = kcontrol->private_value;
1588 	pval &= 0xfffff0f0;
1589 	pval |= (ucontrol->value.iec958.status[1] & 0x0f) << 8;
1590 	pval |= (ucontrol->value.iec958.status[0] & 0x0f);
1591 
1592 	pval &= 0xffff0fff;
1593 	pval |= (ucontrol->value.iec958.status[1] & 0xf0) << 8;
1594 
1595 	/* The frequency bits in AES3 cannot be set via register access. */
1596 
1597 	/* Silently ignore any bits from the request that cannot be set. */
1598 
1599 	if (pval == pval_old)
1600 		return 0;
1601 
1602 	kcontrol->private_value = pval;
1603 	err = snd_microii_spdif_default_update(list);
1604 	return err < 0 ? err : 1;
1605 }
1606 
1607 static int snd_microii_spdif_mask_get(struct snd_kcontrol *kcontrol,
1608 	struct snd_ctl_elem_value *ucontrol)
1609 {
1610 	ucontrol->value.iec958.status[0] = 0x0f;
1611 	ucontrol->value.iec958.status[1] = 0xff;
1612 	ucontrol->value.iec958.status[2] = 0x00;
1613 	ucontrol->value.iec958.status[3] = 0x00;
1614 
1615 	return 0;
1616 }
1617 
1618 static int snd_microii_spdif_switch_get(struct snd_kcontrol *kcontrol,
1619 	struct snd_ctl_elem_value *ucontrol)
1620 {
1621 	ucontrol->value.integer.value[0] = !(kcontrol->private_value & 0x02);
1622 
1623 	return 0;
1624 }
1625 
1626 static int snd_microii_spdif_switch_update(struct usb_mixer_elem_list *list)
1627 {
1628 	struct snd_usb_audio *chip = list->mixer->chip;
1629 	u8 reg = list->kctl->private_value;
1630 	int err;
1631 
1632 	err = snd_usb_lock_shutdown(chip);
1633 	if (err < 0)
1634 		return err;
1635 
1636 	err = snd_usb_ctl_msg(chip->dev,
1637 			usb_sndctrlpipe(chip->dev, 0),
1638 			UAC_SET_CUR,
1639 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1640 			reg,
1641 			9,
1642 			NULL,
1643 			0);
1644 
1645 	snd_usb_unlock_shutdown(chip);
1646 	return err;
1647 }
1648 
1649 static int snd_microii_spdif_switch_put(struct snd_kcontrol *kcontrol,
1650 	struct snd_ctl_elem_value *ucontrol)
1651 {
1652 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1653 	u8 reg;
1654 	int err;
1655 
1656 	reg = ucontrol->value.integer.value[0] ? 0x28 : 0x2a;
1657 	if (reg != list->kctl->private_value)
1658 		return 0;
1659 
1660 	kcontrol->private_value = reg;
1661 	err = snd_microii_spdif_switch_update(list);
1662 	return err < 0 ? err : 1;
1663 }
1664 
1665 static struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
1666 	{
1667 		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
1668 		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
1669 		.info =     snd_microii_spdif_info,
1670 		.get =      snd_microii_spdif_default_get,
1671 		.put =      snd_microii_spdif_default_put,
1672 		.private_value = 0x00000100UL,/* reset value */
1673 	},
1674 	{
1675 		.access =   SNDRV_CTL_ELEM_ACCESS_READ,
1676 		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
1677 		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
1678 		.info =     snd_microii_spdif_info,
1679 		.get =      snd_microii_spdif_mask_get,
1680 	},
1681 	{
1682 		.iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
1683 		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
1684 		.info =     snd_ctl_boolean_mono_info,
1685 		.get =      snd_microii_spdif_switch_get,
1686 		.put =      snd_microii_spdif_switch_put,
1687 		.private_value = 0x00000028UL,/* reset value */
1688 	}
1689 };
1690 
1691 static int snd_microii_controls_create(struct usb_mixer_interface *mixer)
1692 {
1693 	int err, i;
1694 	static usb_mixer_elem_resume_func_t resume_funcs[] = {
1695 		snd_microii_spdif_default_update,
1696 		NULL,
1697 		snd_microii_spdif_switch_update
1698 	};
1699 
1700 	for (i = 0; i < ARRAY_SIZE(snd_microii_mixer_spdif); ++i) {
1701 		err = add_single_ctl_with_resume(mixer, 0,
1702 						 resume_funcs[i],
1703 						 &snd_microii_mixer_spdif[i],
1704 						 NULL);
1705 		if (err < 0)
1706 			return err;
1707 	}
1708 
1709 	return 0;
1710 }
1711 
1712 /* Creative Sound Blaster E1 */
1713 
1714 static int snd_soundblaster_e1_switch_get(struct snd_kcontrol *kcontrol,
1715 					  struct snd_ctl_elem_value *ucontrol)
1716 {
1717 	ucontrol->value.integer.value[0] = kcontrol->private_value;
1718 	return 0;
1719 }
1720 
1721 static int snd_soundblaster_e1_switch_update(struct usb_mixer_interface *mixer,
1722 					     unsigned char state)
1723 {
1724 	struct snd_usb_audio *chip = mixer->chip;
1725 	int err;
1726 	unsigned char buff[2];
1727 
1728 	buff[0] = 0x02;
1729 	buff[1] = state ? 0x02 : 0x00;
1730 
1731 	err = snd_usb_lock_shutdown(chip);
1732 	if (err < 0)
1733 		return err;
1734 	err = snd_usb_ctl_msg(chip->dev,
1735 			usb_sndctrlpipe(chip->dev, 0), HID_REQ_SET_REPORT,
1736 			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
1737 			0x0202, 3, buff, 2);
1738 	snd_usb_unlock_shutdown(chip);
1739 	return err;
1740 }
1741 
1742 static int snd_soundblaster_e1_switch_put(struct snd_kcontrol *kcontrol,
1743 					  struct snd_ctl_elem_value *ucontrol)
1744 {
1745 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1746 	unsigned char value = !!ucontrol->value.integer.value[0];
1747 	int err;
1748 
1749 	if (kcontrol->private_value == value)
1750 		return 0;
1751 	kcontrol->private_value = value;
1752 	err = snd_soundblaster_e1_switch_update(list->mixer, value);
1753 	return err < 0 ? err : 1;
1754 }
1755 
1756 static int snd_soundblaster_e1_switch_resume(struct usb_mixer_elem_list *list)
1757 {
1758 	return snd_soundblaster_e1_switch_update(list->mixer,
1759 						 list->kctl->private_value);
1760 }
1761 
1762 static int snd_soundblaster_e1_switch_info(struct snd_kcontrol *kcontrol,
1763 					   struct snd_ctl_elem_info *uinfo)
1764 {
1765 	static const char *const texts[2] = {
1766 		"Mic", "Aux"
1767 	};
1768 
1769 	return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
1770 }
1771 
1772 static struct snd_kcontrol_new snd_soundblaster_e1_input_switch = {
1773 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1774 	.name = "Input Source",
1775 	.info = snd_soundblaster_e1_switch_info,
1776 	.get = snd_soundblaster_e1_switch_get,
1777 	.put = snd_soundblaster_e1_switch_put,
1778 	.private_value = 0,
1779 };
1780 
1781 static int snd_soundblaster_e1_switch_create(struct usb_mixer_interface *mixer)
1782 {
1783 	return add_single_ctl_with_resume(mixer, 0,
1784 					  snd_soundblaster_e1_switch_resume,
1785 					  &snd_soundblaster_e1_input_switch,
1786 					  NULL);
1787 }
1788 
1789 static void dell_dock_init_vol(struct snd_usb_audio *chip, int ch, int id)
1790 {
1791 	u16 buf = 0;
1792 
1793 	snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0), UAC_SET_CUR,
1794 			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1795 			ch, snd_usb_ctrl_intf(chip) | (id << 8),
1796 			&buf, 2);
1797 }
1798 
1799 static int dell_dock_mixer_init(struct usb_mixer_interface *mixer)
1800 {
1801 	/* fix to 0dB playback volumes */
1802 	dell_dock_init_vol(mixer->chip, 1, 16);
1803 	dell_dock_init_vol(mixer->chip, 2, 16);
1804 	dell_dock_init_vol(mixer->chip, 1, 19);
1805 	dell_dock_init_vol(mixer->chip, 2, 19);
1806 	return 0;
1807 }
1808 
1809 /* RME Class Compliant device quirks */
1810 
1811 #define SND_RME_GET_STATUS1			23
1812 #define SND_RME_GET_CURRENT_FREQ		17
1813 #define SND_RME_CLK_SYSTEM_SHIFT		16
1814 #define SND_RME_CLK_SYSTEM_MASK			0x1f
1815 #define SND_RME_CLK_AES_SHIFT			8
1816 #define SND_RME_CLK_SPDIF_SHIFT			12
1817 #define SND_RME_CLK_AES_SPDIF_MASK		0xf
1818 #define SND_RME_CLK_SYNC_SHIFT			6
1819 #define SND_RME_CLK_SYNC_MASK			0x3
1820 #define SND_RME_CLK_FREQMUL_SHIFT		18
1821 #define SND_RME_CLK_FREQMUL_MASK		0x7
1822 #define SND_RME_CLK_SYSTEM(x) \
1823 	((x >> SND_RME_CLK_SYSTEM_SHIFT) & SND_RME_CLK_SYSTEM_MASK)
1824 #define SND_RME_CLK_AES(x) \
1825 	((x >> SND_RME_CLK_AES_SHIFT) & SND_RME_CLK_AES_SPDIF_MASK)
1826 #define SND_RME_CLK_SPDIF(x) \
1827 	((x >> SND_RME_CLK_SPDIF_SHIFT) & SND_RME_CLK_AES_SPDIF_MASK)
1828 #define SND_RME_CLK_SYNC(x) \
1829 	((x >> SND_RME_CLK_SYNC_SHIFT) & SND_RME_CLK_SYNC_MASK)
1830 #define SND_RME_CLK_FREQMUL(x) \
1831 	((x >> SND_RME_CLK_FREQMUL_SHIFT) & SND_RME_CLK_FREQMUL_MASK)
1832 #define SND_RME_CLK_AES_LOCK			0x1
1833 #define SND_RME_CLK_AES_SYNC			0x4
1834 #define SND_RME_CLK_SPDIF_LOCK			0x2
1835 #define SND_RME_CLK_SPDIF_SYNC			0x8
1836 #define SND_RME_SPDIF_IF_SHIFT			4
1837 #define SND_RME_SPDIF_FORMAT_SHIFT		5
1838 #define SND_RME_BINARY_MASK			0x1
1839 #define SND_RME_SPDIF_IF(x) \
1840 	((x >> SND_RME_SPDIF_IF_SHIFT) & SND_RME_BINARY_MASK)
1841 #define SND_RME_SPDIF_FORMAT(x) \
1842 	((x >> SND_RME_SPDIF_FORMAT_SHIFT) & SND_RME_BINARY_MASK)
1843 
1844 static const u32 snd_rme_rate_table[] = {
1845 	32000, 44100, 48000, 50000,
1846 	64000, 88200, 96000, 100000,
1847 	128000, 176400, 192000, 200000,
1848 	256000,	352800, 384000, 400000,
1849 	512000, 705600, 768000, 800000
1850 };
1851 /* maximum number of items for AES and S/PDIF rates for above table */
1852 #define SND_RME_RATE_IDX_AES_SPDIF_NUM		12
1853 
1854 enum snd_rme_domain {
1855 	SND_RME_DOMAIN_SYSTEM,
1856 	SND_RME_DOMAIN_AES,
1857 	SND_RME_DOMAIN_SPDIF
1858 };
1859 
1860 enum snd_rme_clock_status {
1861 	SND_RME_CLOCK_NOLOCK,
1862 	SND_RME_CLOCK_LOCK,
1863 	SND_RME_CLOCK_SYNC
1864 };
1865 
1866 static int snd_rme_read_value(struct snd_usb_audio *chip,
1867 			      unsigned int item,
1868 			      u32 *value)
1869 {
1870 	struct usb_device *dev = chip->dev;
1871 	int err;
1872 
1873 	err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
1874 			      item,
1875 			      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1876 			      0, 0,
1877 			      value, sizeof(*value));
1878 	if (err < 0)
1879 		dev_err(&dev->dev,
1880 			"unable to issue vendor read request %d (ret = %d)",
1881 			item, err);
1882 	return err;
1883 }
1884 
1885 static int snd_rme_get_status1(struct snd_kcontrol *kcontrol,
1886 			       u32 *status1)
1887 {
1888 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1889 	struct snd_usb_audio *chip = list->mixer->chip;
1890 	int err;
1891 
1892 	err = snd_usb_lock_shutdown(chip);
1893 	if (err < 0)
1894 		return err;
1895 	err = snd_rme_read_value(chip, SND_RME_GET_STATUS1, status1);
1896 	snd_usb_unlock_shutdown(chip);
1897 	return err;
1898 }
1899 
1900 static int snd_rme_rate_get(struct snd_kcontrol *kcontrol,
1901 			    struct snd_ctl_elem_value *ucontrol)
1902 {
1903 	u32 status1;
1904 	u32 rate = 0;
1905 	int idx;
1906 	int err;
1907 
1908 	err = snd_rme_get_status1(kcontrol, &status1);
1909 	if (err < 0)
1910 		return err;
1911 	switch (kcontrol->private_value) {
1912 	case SND_RME_DOMAIN_SYSTEM:
1913 		idx = SND_RME_CLK_SYSTEM(status1);
1914 		if (idx < ARRAY_SIZE(snd_rme_rate_table))
1915 			rate = snd_rme_rate_table[idx];
1916 		break;
1917 	case SND_RME_DOMAIN_AES:
1918 		idx = SND_RME_CLK_AES(status1);
1919 		if (idx < SND_RME_RATE_IDX_AES_SPDIF_NUM)
1920 			rate = snd_rme_rate_table[idx];
1921 		break;
1922 	case SND_RME_DOMAIN_SPDIF:
1923 		idx = SND_RME_CLK_SPDIF(status1);
1924 		if (idx < SND_RME_RATE_IDX_AES_SPDIF_NUM)
1925 			rate = snd_rme_rate_table[idx];
1926 		break;
1927 	default:
1928 		return -EINVAL;
1929 	}
1930 	ucontrol->value.integer.value[0] = rate;
1931 	return 0;
1932 }
1933 
1934 static int snd_rme_sync_state_get(struct snd_kcontrol *kcontrol,
1935 				  struct snd_ctl_elem_value *ucontrol)
1936 {
1937 	u32 status1;
1938 	int idx = SND_RME_CLOCK_NOLOCK;
1939 	int err;
1940 
1941 	err = snd_rme_get_status1(kcontrol, &status1);
1942 	if (err < 0)
1943 		return err;
1944 	switch (kcontrol->private_value) {
1945 	case SND_RME_DOMAIN_AES:  /* AES */
1946 		if (status1 & SND_RME_CLK_AES_SYNC)
1947 			idx = SND_RME_CLOCK_SYNC;
1948 		else if (status1 & SND_RME_CLK_AES_LOCK)
1949 			idx = SND_RME_CLOCK_LOCK;
1950 		break;
1951 	case SND_RME_DOMAIN_SPDIF:  /* SPDIF */
1952 		if (status1 & SND_RME_CLK_SPDIF_SYNC)
1953 			idx = SND_RME_CLOCK_SYNC;
1954 		else if (status1 & SND_RME_CLK_SPDIF_LOCK)
1955 			idx = SND_RME_CLOCK_LOCK;
1956 		break;
1957 	default:
1958 		return -EINVAL;
1959 	}
1960 	ucontrol->value.enumerated.item[0] = idx;
1961 	return 0;
1962 }
1963 
1964 static int snd_rme_spdif_if_get(struct snd_kcontrol *kcontrol,
1965 				struct snd_ctl_elem_value *ucontrol)
1966 {
1967 	u32 status1;
1968 	int err;
1969 
1970 	err = snd_rme_get_status1(kcontrol, &status1);
1971 	if (err < 0)
1972 		return err;
1973 	ucontrol->value.enumerated.item[0] = SND_RME_SPDIF_IF(status1);
1974 	return 0;
1975 }
1976 
1977 static int snd_rme_spdif_format_get(struct snd_kcontrol *kcontrol,
1978 				    struct snd_ctl_elem_value *ucontrol)
1979 {
1980 	u32 status1;
1981 	int err;
1982 
1983 	err = snd_rme_get_status1(kcontrol, &status1);
1984 	if (err < 0)
1985 		return err;
1986 	ucontrol->value.enumerated.item[0] = SND_RME_SPDIF_FORMAT(status1);
1987 	return 0;
1988 }
1989 
1990 static int snd_rme_sync_source_get(struct snd_kcontrol *kcontrol,
1991 				   struct snd_ctl_elem_value *ucontrol)
1992 {
1993 	u32 status1;
1994 	int err;
1995 
1996 	err = snd_rme_get_status1(kcontrol, &status1);
1997 	if (err < 0)
1998 		return err;
1999 	ucontrol->value.enumerated.item[0] = SND_RME_CLK_SYNC(status1);
2000 	return 0;
2001 }
2002 
2003 static int snd_rme_current_freq_get(struct snd_kcontrol *kcontrol,
2004 				    struct snd_ctl_elem_value *ucontrol)
2005 {
2006 	struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
2007 	struct snd_usb_audio *chip = list->mixer->chip;
2008 	u32 status1;
2009 	const u64 num = 104857600000000ULL;
2010 	u32 den;
2011 	unsigned int freq;
2012 	int err;
2013 
2014 	err = snd_usb_lock_shutdown(chip);
2015 	if (err < 0)
2016 		return err;
2017 	err = snd_rme_read_value(chip, SND_RME_GET_STATUS1, &status1);
2018 	if (err < 0)
2019 		goto end;
2020 	err = snd_rme_read_value(chip, SND_RME_GET_CURRENT_FREQ, &den);
2021 	if (err < 0)
2022 		goto end;
2023 	freq = (den == 0) ? 0 : div64_u64(num, den);
2024 	freq <<= SND_RME_CLK_FREQMUL(status1);
2025 	ucontrol->value.integer.value[0] = freq;
2026 
2027 end:
2028 	snd_usb_unlock_shutdown(chip);
2029 	return err;
2030 }
2031 
2032 static int snd_rme_rate_info(struct snd_kcontrol *kcontrol,
2033 			     struct snd_ctl_elem_info *uinfo)
2034 {
2035 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2036 	uinfo->count = 1;
2037 	switch (kcontrol->private_value) {
2038 	case SND_RME_DOMAIN_SYSTEM:
2039 		uinfo->value.integer.min = 32000;
2040 		uinfo->value.integer.max = 800000;
2041 		break;
2042 	case SND_RME_DOMAIN_AES:
2043 	case SND_RME_DOMAIN_SPDIF:
2044 	default:
2045 		uinfo->value.integer.min = 0;
2046 		uinfo->value.integer.max = 200000;
2047 	}
2048 	uinfo->value.integer.step = 0;
2049 	return 0;
2050 }
2051 
2052 static int snd_rme_sync_state_info(struct snd_kcontrol *kcontrol,
2053 				   struct snd_ctl_elem_info *uinfo)
2054 {
2055 	static const char *const sync_states[] = {
2056 		"No Lock", "Lock", "Sync"
2057 	};
2058 
2059 	return snd_ctl_enum_info(uinfo, 1,
2060 				 ARRAY_SIZE(sync_states), sync_states);
2061 }
2062 
2063 static int snd_rme_spdif_if_info(struct snd_kcontrol *kcontrol,
2064 				 struct snd_ctl_elem_info *uinfo)
2065 {
2066 	static const char *const spdif_if[] = {
2067 		"Coaxial", "Optical"
2068 	};
2069 
2070 	return snd_ctl_enum_info(uinfo, 1,
2071 				 ARRAY_SIZE(spdif_if), spdif_if);
2072 }
2073 
2074 static int snd_rme_spdif_format_info(struct snd_kcontrol *kcontrol,
2075 				     struct snd_ctl_elem_info *uinfo)
2076 {
2077 	static const char *const optical_type[] = {
2078 		"Consumer", "Professional"
2079 	};
2080 
2081 	return snd_ctl_enum_info(uinfo, 1,
2082 				 ARRAY_SIZE(optical_type), optical_type);
2083 }
2084 
2085 static int snd_rme_sync_source_info(struct snd_kcontrol *kcontrol,
2086 				    struct snd_ctl_elem_info *uinfo)
2087 {
2088 	static const char *const sync_sources[] = {
2089 		"Internal", "AES", "SPDIF", "Internal"
2090 	};
2091 
2092 	return snd_ctl_enum_info(uinfo, 1,
2093 				 ARRAY_SIZE(sync_sources), sync_sources);
2094 }
2095 
2096 static struct snd_kcontrol_new snd_rme_controls[] = {
2097 	{
2098 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2099 		.name = "AES Rate",
2100 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2101 		.info = snd_rme_rate_info,
2102 		.get = snd_rme_rate_get,
2103 		.private_value = SND_RME_DOMAIN_AES
2104 	},
2105 	{
2106 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2107 		.name = "AES Sync",
2108 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2109 		.info = snd_rme_sync_state_info,
2110 		.get = snd_rme_sync_state_get,
2111 		.private_value = SND_RME_DOMAIN_AES
2112 	},
2113 	{
2114 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2115 		.name = "SPDIF Rate",
2116 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2117 		.info = snd_rme_rate_info,
2118 		.get = snd_rme_rate_get,
2119 		.private_value = SND_RME_DOMAIN_SPDIF
2120 	},
2121 	{
2122 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2123 		.name = "SPDIF Sync",
2124 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2125 		.info = snd_rme_sync_state_info,
2126 		.get = snd_rme_sync_state_get,
2127 		.private_value = SND_RME_DOMAIN_SPDIF
2128 	},
2129 	{
2130 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2131 		.name = "SPDIF Interface",
2132 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2133 		.info = snd_rme_spdif_if_info,
2134 		.get = snd_rme_spdif_if_get,
2135 	},
2136 	{
2137 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2138 		.name = "SPDIF Format",
2139 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2140 		.info = snd_rme_spdif_format_info,
2141 		.get = snd_rme_spdif_format_get,
2142 	},
2143 	{
2144 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2145 		.name = "Sync Source",
2146 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2147 		.info = snd_rme_sync_source_info,
2148 		.get = snd_rme_sync_source_get
2149 	},
2150 	{
2151 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2152 		.name = "System Rate",
2153 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2154 		.info = snd_rme_rate_info,
2155 		.get = snd_rme_rate_get,
2156 		.private_value = SND_RME_DOMAIN_SYSTEM
2157 	},
2158 	{
2159 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2160 		.name = "Current Frequency",
2161 		.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
2162 		.info = snd_rme_rate_info,
2163 		.get = snd_rme_current_freq_get
2164 	}
2165 };
2166 
2167 static int snd_rme_controls_create(struct usb_mixer_interface *mixer)
2168 {
2169 	int err, i;
2170 
2171 	for (i = 0; i < ARRAY_SIZE(snd_rme_controls); ++i) {
2172 		err = add_single_ctl_with_resume(mixer, 0,
2173 						 NULL,
2174 						 &snd_rme_controls[i],
2175 						 NULL);
2176 		if (err < 0)
2177 			return err;
2178 	}
2179 
2180 	return 0;
2181 }
2182 
2183 int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
2184 {
2185 	int err = 0;
2186 
2187 	err = snd_usb_soundblaster_remote_init(mixer);
2188 	if (err < 0)
2189 		return err;
2190 
2191 	switch (mixer->chip->usb_id) {
2192 	/* Tascam US-16x08 */
2193 	case USB_ID(0x0644, 0x8047):
2194 		err = snd_us16x08_controls_create(mixer);
2195 		break;
2196 	case USB_ID(0x041e, 0x3020):
2197 	case USB_ID(0x041e, 0x3040):
2198 	case USB_ID(0x041e, 0x3042):
2199 	case USB_ID(0x041e, 0x30df):
2200 	case USB_ID(0x041e, 0x3048):
2201 		err = snd_audigy2nx_controls_create(mixer);
2202 		if (err < 0)
2203 			break;
2204 		snd_card_ro_proc_new(mixer->chip->card, "audigy2nx",
2205 				     mixer, snd_audigy2nx_proc_read);
2206 		break;
2207 
2208 	/* EMU0204 */
2209 	case USB_ID(0x041e, 0x3f19):
2210 		err = snd_emu0204_controls_create(mixer);
2211 		break;
2212 
2213 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
2214 	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */
2215 		err = snd_c400_create_mixer(mixer);
2216 		break;
2217 
2218 	case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
2219 	case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
2220 		err = snd_ftu_create_mixer(mixer);
2221 		break;
2222 
2223 	case USB_ID(0x0b05, 0x1739): /* ASUS Xonar U1 */
2224 	case USB_ID(0x0b05, 0x1743): /* ASUS Xonar U1 (2) */
2225 	case USB_ID(0x0b05, 0x17a0): /* ASUS Xonar U3 */
2226 		err = snd_xonar_u1_controls_create(mixer);
2227 		break;
2228 
2229 	case USB_ID(0x0d8c, 0x0103): /* Audio Advantage Micro II */
2230 		err = snd_microii_controls_create(mixer);
2231 		break;
2232 
2233 	case USB_ID(0x0dba, 0x1000): /* Digidesign Mbox 1 */
2234 		err = snd_mbox1_create_sync_switch(mixer);
2235 		break;
2236 
2237 	case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */
2238 		err = snd_nativeinstruments_create_mixer(mixer,
2239 				snd_nativeinstruments_ta6_mixers,
2240 				ARRAY_SIZE(snd_nativeinstruments_ta6_mixers));
2241 		break;
2242 
2243 	case USB_ID(0x17cc, 0x1021): /* Traktor Audio 10 */
2244 		err = snd_nativeinstruments_create_mixer(mixer,
2245 				snd_nativeinstruments_ta10_mixers,
2246 				ARRAY_SIZE(snd_nativeinstruments_ta10_mixers));
2247 		break;
2248 
2249 	case USB_ID(0x200c, 0x1018): /* Electrix Ebox-44 */
2250 		/* detection is disabled in mixer_maps.c */
2251 		err = snd_create_std_mono_table(mixer, ebox44_table);
2252 		break;
2253 
2254 	case USB_ID(0x1235, 0x8012): /* Focusrite Scarlett 6i6 */
2255 	case USB_ID(0x1235, 0x8002): /* Focusrite Scarlett 8i6 */
2256 	case USB_ID(0x1235, 0x8004): /* Focusrite Scarlett 18i6 */
2257 	case USB_ID(0x1235, 0x8014): /* Focusrite Scarlett 18i8 */
2258 	case USB_ID(0x1235, 0x800c): /* Focusrite Scarlett 18i20 */
2259 		err = snd_scarlett_controls_create(mixer);
2260 		break;
2261 
2262 	case USB_ID(0x1235, 0x8203): /* Focusrite Scarlett 6i6 2nd Gen */
2263 	case USB_ID(0x1235, 0x8204): /* Focusrite Scarlett 18i8 2nd Gen */
2264 	case USB_ID(0x1235, 0x8201): /* Focusrite Scarlett 18i20 2nd Gen */
2265 		err = snd_scarlett_gen2_controls_create(mixer);
2266 		break;
2267 
2268 	case USB_ID(0x041e, 0x323b): /* Creative Sound Blaster E1 */
2269 		err = snd_soundblaster_e1_switch_create(mixer);
2270 		break;
2271 	case USB_ID(0x0bda, 0x4014): /* Dell WD15 dock */
2272 		err = dell_dock_mixer_init(mixer);
2273 		break;
2274 
2275 	case USB_ID(0x2a39, 0x3fd2): /* RME ADI-2 Pro */
2276 	case USB_ID(0x2a39, 0x3fd3): /* RME ADI-2 DAC */
2277 	case USB_ID(0x2a39, 0x3fd4): /* RME */
2278 		err = snd_rme_controls_create(mixer);
2279 		break;
2280 	}
2281 
2282 	return err;
2283 }
2284 
2285 #ifdef CONFIG_PM
2286 void snd_usb_mixer_resume_quirk(struct usb_mixer_interface *mixer)
2287 {
2288 	switch (mixer->chip->usb_id) {
2289 	case USB_ID(0x0bda, 0x4014): /* Dell WD15 dock */
2290 		dell_dock_mixer_init(mixer);
2291 		break;
2292 	}
2293 }
2294 #endif
2295 
2296 void snd_usb_mixer_rc_memory_change(struct usb_mixer_interface *mixer,
2297 				    int unitid)
2298 {
2299 	if (!mixer->rc_cfg)
2300 		return;
2301 	/* unit ids specific to Extigy/Audigy 2 NX: */
2302 	switch (unitid) {
2303 	case 0: /* remote control */
2304 		mixer->rc_urb->dev = mixer->chip->dev;
2305 		usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
2306 		break;
2307 	case 4: /* digital in jack */
2308 	case 7: /* line in jacks */
2309 	case 19: /* speaker out jacks */
2310 	case 20: /* headphones out jack */
2311 		break;
2312 	/* live24ext: 4 = line-in jack */
2313 	case 3:	/* hp-out jack (may actuate Mute) */
2314 		if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2315 		    mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
2316 			snd_usb_mixer_notify_id(mixer, mixer->rc_cfg->mute_mixer_id);
2317 		break;
2318 	default:
2319 		usb_audio_dbg(mixer->chip, "memory change in unknown unit %d\n", unitid);
2320 		break;
2321 	}
2322 }
2323 
2324 static void snd_dragonfly_quirk_db_scale(struct usb_mixer_interface *mixer,
2325 					 struct usb_mixer_elem_info *cval,
2326 					 struct snd_kcontrol *kctl)
2327 {
2328 	/* Approximation using 10 ranges based on output measurement on hw v1.2.
2329 	 * This seems close to the cubic mapping e.g. alsamixer uses. */
2330 	static const DECLARE_TLV_DB_RANGE(scale,
2331 		 0,  1, TLV_DB_MINMAX_ITEM(-5300, -4970),
2332 		 2,  5, TLV_DB_MINMAX_ITEM(-4710, -4160),
2333 		 6,  7, TLV_DB_MINMAX_ITEM(-3884, -3710),
2334 		 8, 14, TLV_DB_MINMAX_ITEM(-3443, -2560),
2335 		15, 16, TLV_DB_MINMAX_ITEM(-2475, -2324),
2336 		17, 19, TLV_DB_MINMAX_ITEM(-2228, -2031),
2337 		20, 26, TLV_DB_MINMAX_ITEM(-1910, -1393),
2338 		27, 31, TLV_DB_MINMAX_ITEM(-1322, -1032),
2339 		32, 40, TLV_DB_MINMAX_ITEM(-968, -490),
2340 		41, 50, TLV_DB_MINMAX_ITEM(-441, 0),
2341 	);
2342 
2343 	if (cval->min == 0 && cval->max == 50) {
2344 		usb_audio_info(mixer->chip, "applying DragonFly dB scale quirk (0-50 variant)\n");
2345 		kctl->tlv.p = scale;
2346 		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
2347 		kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
2348 
2349 	} else if (cval->min == 0 && cval->max <= 1000) {
2350 		/* Some other clearly broken DragonFly variant.
2351 		 * At least a 0..53 variant (hw v1.0) exists.
2352 		 */
2353 		usb_audio_info(mixer->chip, "ignoring too narrow dB range on a DragonFly device");
2354 		kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
2355 	}
2356 }
2357 
2358 void snd_usb_mixer_fu_apply_quirk(struct usb_mixer_interface *mixer,
2359 				  struct usb_mixer_elem_info *cval, int unitid,
2360 				  struct snd_kcontrol *kctl)
2361 {
2362 	switch (mixer->chip->usb_id) {
2363 	case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
2364 		if (unitid == 7 && cval->control == UAC_FU_VOLUME)
2365 			snd_dragonfly_quirk_db_scale(mixer, cval, kctl);
2366 		break;
2367 	/* lowest playback value is muted on C-Media devices */
2368 	case USB_ID(0x0d8c, 0x000c):
2369 	case USB_ID(0x0d8c, 0x0014):
2370 		if (strstr(kctl->id.name, "Playback"))
2371 			cval->min_mute = 1;
2372 		break;
2373 	}
2374 }
2375 
2376