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TOMOYO Linux Cross Reference
Linux/sound/usb/mixer_quirks.c

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  1 /*
  2  *   USB Audio Driver for ALSA
  3  *
  4  *   Quirks and vendor-specific extensions for mixer interfaces
  5  *
  6  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
  7  *
  8  *   Many codes borrowed from audio.c by
  9  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
 10  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
 11  *
 12  *   Audio Advantage Micro II support added by:
 13  *          Przemek Rudy (prudy1@o2.pl)
 14  *
 15  *   This program is free software; you can redistribute it and/or modify
 16  *   it under the terms of the GNU General Public License as published by
 17  *   the Free Software Foundation; either version 2 of the License, or
 18  *   (at your option) any later version.
 19  *
 20  *   This program is distributed in the hope that it will be useful,
 21  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 22  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 23  *   GNU General Public License for more details.
 24  *
 25  *   You should have received a copy of the GNU General Public License
 26  *   along with this program; if not, write to the Free Software
 27  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 28  */
 29 
 30 #include <linux/init.h>
 31 #include <linux/slab.h>
 32 #include <linux/usb.h>
 33 #include <linux/usb/audio.h>
 34 
 35 #include <sound/asoundef.h>
 36 #include <sound/core.h>
 37 #include <sound/control.h>
 38 #include <sound/hwdep.h>
 39 #include <sound/info.h>
 40 #include <sound/tlv.h>
 41 
 42 #include "usbaudio.h"
 43 #include "mixer.h"
 44 #include "mixer_quirks.h"
 45 #include "mixer_scarlett.h"
 46 #include "mixer_us16x08.h"
 47 #include "helper.h"
 48 
 49 extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
 50 
 51 struct std_mono_table {
 52         unsigned int unitid, control, cmask;
 53         int val_type;
 54         const char *name;
 55         snd_kcontrol_tlv_rw_t *tlv_callback;
 56 };
 57 
 58 /* This function allows for the creation of standard UAC controls.
 59  * See the quirks for M-Audio FTUs or Ebox-44.
 60  * If you don't want to set a TLV callback pass NULL.
 61  *
 62  * Since there doesn't seem to be a devices that needs a multichannel
 63  * version, we keep it mono for simplicity.
 64  */
 65 static int snd_create_std_mono_ctl_offset(struct usb_mixer_interface *mixer,
 66                                 unsigned int unitid,
 67                                 unsigned int control,
 68                                 unsigned int cmask,
 69                                 int val_type,
 70                                 unsigned int idx_off,
 71                                 const char *name,
 72                                 snd_kcontrol_tlv_rw_t *tlv_callback)
 73 {
 74         struct usb_mixer_elem_info *cval;
 75         struct snd_kcontrol *kctl;
 76 
 77         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
 78         if (!cval)
 79                 return -ENOMEM;
 80 
 81         snd_usb_mixer_elem_init_std(&cval->head, mixer, unitid);
 82         cval->val_type = val_type;
 83         cval->channels = 1;
 84         cval->control = control;
 85         cval->cmask = cmask;
 86         cval->idx_off = idx_off;
 87 
 88         /* get_min_max() is called only for integer volumes later,
 89          * so provide a short-cut for booleans */
 90         cval->min = 0;
 91         cval->max = 1;
 92         cval->res = 0;
 93         cval->dBmin = 0;
 94         cval->dBmax = 0;
 95 
 96         /* Create control */
 97         kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);
 98         if (!kctl) {
 99                 kfree(cval);
100                 return -ENOMEM;
101         }
102 
103         /* Set name */
104         snprintf(kctl->id.name, sizeof(kctl->id.name), name);
105         kctl->private_free = snd_usb_mixer_elem_free;
106 
107         /* set TLV */
108         if (tlv_callback) {
109                 kctl->tlv.c = tlv_callback;
110                 kctl->vd[0].access |=
111                         SNDRV_CTL_ELEM_ACCESS_TLV_READ |
112                         SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
113         }
114         /* Add control to mixer */
115         return snd_usb_mixer_add_control(&cval->head, kctl);
116 }
117 
118 static int snd_create_std_mono_ctl(struct usb_mixer_interface *mixer,
119                                 unsigned int unitid,
120                                 unsigned int control,
121                                 unsigned int cmask,
122                                 int val_type,
123                                 const char *name,
124                                 snd_kcontrol_tlv_rw_t *tlv_callback)
125 {
126         return snd_create_std_mono_ctl_offset(mixer, unitid, control, cmask,
127                 val_type, 0 /* Offset */, name, tlv_callback);
128 }
129 
130 /*
131  * Create a set of standard UAC controls from a table
132  */
133 static int snd_create_std_mono_table(struct usb_mixer_interface *mixer,
134                                 struct std_mono_table *t)
135 {
136         int err;
137 
138         while (t->name != NULL) {
139                 err = snd_create_std_mono_ctl(mixer, t->unitid, t->control,
140                                 t->cmask, t->val_type, t->name, t->tlv_callback);
141                 if (err < 0)
142                         return err;
143                 t++;
144         }
145 
146         return 0;
147 }
148 
149 static int add_single_ctl_with_resume(struct usb_mixer_interface *mixer,
150                                       int id,
151                                       usb_mixer_elem_resume_func_t resume,
152                                       const struct snd_kcontrol_new *knew,
153                                       struct usb_mixer_elem_list **listp)
154 {
155         struct usb_mixer_elem_list *list;
156         struct snd_kcontrol *kctl;
157 
158         list = kzalloc(sizeof(*list), GFP_KERNEL);
159         if (!list)
160                 return -ENOMEM;
161         if (listp)
162                 *listp = list;
163         list->mixer = mixer;
164         list->id = id;
165         list->resume = resume;
166         kctl = snd_ctl_new1(knew, list);
167         if (!kctl) {
168                 kfree(list);
169                 return -ENOMEM;
170         }
171         kctl->private_free = snd_usb_mixer_elem_free;
172         return snd_usb_mixer_add_control(list, kctl);
173 }
174 
175 /*
176  * Sound Blaster remote control configuration
177  *
178  * format of remote control data:
179  * Extigy:       xx 00
180  * Audigy 2 NX:  06 80 xx 00 00 00
181  * Live! 24-bit: 06 80 xx yy 22 83
182  */
183 static const struct rc_config {
184         u32 usb_id;
185         u8  offset;
186         u8  length;
187         u8  packet_length;
188         u8  min_packet_length; /* minimum accepted length of the URB result */
189         u8  mute_mixer_id;
190         u32 mute_code;
191 } rc_configs[] = {
192         { USB_ID(0x041e, 0x3000), 0, 1, 2, 1,  18, 0x0013 }, /* Extigy       */
193         { USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
194         { USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
195         { USB_ID(0x041e, 0x3042), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 */
196         { USB_ID(0x041e, 0x30df), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
197         { USB_ID(0x041e, 0x3237), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
198         { USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
199 };
200 
201 static void snd_usb_soundblaster_remote_complete(struct urb *urb)
202 {
203         struct usb_mixer_interface *mixer = urb->context;
204         const struct rc_config *rc = mixer->rc_cfg;
205         u32 code;
206 
207         if (urb->status < 0 || urb->actual_length < rc->min_packet_length)
208                 return;
209 
210         code = mixer->rc_buffer[rc->offset];
211         if (rc->length == 2)
212                 code |= mixer->rc_buffer[rc->offset + 1] << 8;
213 
214         /* the Mute button actually changes the mixer control */
215         if (code == rc->mute_code)
216                 snd_usb_mixer_notify_id(mixer, rc->mute_mixer_id);
217         mixer->rc_code = code;
218         wmb();
219         wake_up(&mixer->rc_waitq);
220 }
221 
222 static long snd_usb_sbrc_hwdep_read(struct snd_hwdep *hw, char __user *buf,
223                                      long count, loff_t *offset)
224 {
225         struct usb_mixer_interface *mixer = hw->private_data;
226         int err;
227         u32 rc_code;
228 
229         if (count != 1 && count != 4)
230                 return -EINVAL;
231         err = wait_event_interruptible(mixer->rc_waitq,
232                                        (rc_code = xchg(&mixer->rc_code, 0)) != 0);
233         if (err == 0) {
234                 if (count == 1)
235                         err = put_user(rc_code, buf);
236                 else
237                         err = put_user(rc_code, (u32 __user *)buf);
238         }
239         return err < 0 ? err : count;
240 }
241 
242 static unsigned int snd_usb_sbrc_hwdep_poll(struct snd_hwdep *hw, struct file *file,
243                                             poll_table *wait)
244 {
245         struct usb_mixer_interface *mixer = hw->private_data;
246 
247         poll_wait(file, &mixer->rc_waitq, wait);
248         return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
249 }
250 
251 static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
252 {
253         struct snd_hwdep *hwdep;
254         int err, len, i;
255 
256         for (i = 0; i < ARRAY_SIZE(rc_configs); ++i)
257                 if (rc_configs[i].usb_id == mixer->chip->usb_id)
258                         break;
259         if (i >= ARRAY_SIZE(rc_configs))
260                 return 0;
261         mixer->rc_cfg = &rc_configs[i];
262 
263         len = mixer->rc_cfg->packet_length;
264 
265         init_waitqueue_head(&mixer->rc_waitq);
266         err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
267         if (err < 0)
268                 return err;
269         snprintf(hwdep->name, sizeof(hwdep->name),
270                  "%s remote control", mixer->chip->card->shortname);
271         hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
272         hwdep->private_data = mixer;
273         hwdep->ops.read = snd_usb_sbrc_hwdep_read;
274         hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
275         hwdep->exclusive = 1;
276 
277         mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
278         if (!mixer->rc_urb)
279                 return -ENOMEM;
280         mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
281         if (!mixer->rc_setup_packet) {
282                 usb_free_urb(mixer->rc_urb);
283                 mixer->rc_urb = NULL;
284                 return -ENOMEM;
285         }
286         mixer->rc_setup_packet->bRequestType =
287                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
288         mixer->rc_setup_packet->bRequest = UAC_GET_MEM;
289         mixer->rc_setup_packet->wValue = cpu_to_le16(0);
290         mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
291         mixer->rc_setup_packet->wLength = cpu_to_le16(len);
292         usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
293                              usb_rcvctrlpipe(mixer->chip->dev, 0),
294                              (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
295                              snd_usb_soundblaster_remote_complete, mixer);
296         return 0;
297 }
298 
299 #define snd_audigy2nx_led_info          snd_ctl_boolean_mono_info
300 
301 static int snd_audigy2nx_led_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
302 {
303         ucontrol->value.integer.value[0] = kcontrol->private_value >> 8;
304         return 0;
305 }
306 
307 static int snd_audigy2nx_led_update(struct usb_mixer_interface *mixer,
308                                     int value, int index)
309 {
310         struct snd_usb_audio *chip = mixer->chip;
311         int err;
312 
313         err = snd_usb_lock_shutdown(chip);
314         if (err < 0)
315                 return err;
316 
317         if (chip->usb_id == USB_ID(0x041e, 0x3042))
318                 err = snd_usb_ctl_msg(chip->dev,
319                               usb_sndctrlpipe(chip->dev, 0), 0x24,
320                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
321                               !value, 0, NULL, 0);
322         /* USB X-Fi S51 Pro */
323         if (chip->usb_id == USB_ID(0x041e, 0x30df))
324                 err = snd_usb_ctl_msg(chip->dev,
325                               usb_sndctrlpipe(chip->dev, 0), 0x24,
326                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
327                               !value, 0, NULL, 0);
328         else
329                 err = snd_usb_ctl_msg(chip->dev,
330                               usb_sndctrlpipe(chip->dev, 0), 0x24,
331                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
332                               value, index + 2, NULL, 0);
333         snd_usb_unlock_shutdown(chip);
334         return err;
335 }
336 
337 static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol,
338                                  struct snd_ctl_elem_value *ucontrol)
339 {
340         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
341         struct usb_mixer_interface *mixer = list->mixer;
342         int index = kcontrol->private_value & 0xff;
343         unsigned int value = ucontrol->value.integer.value[0];
344         int old_value = kcontrol->private_value >> 8;
345         int err;
346 
347         if (value > 1)
348                 return -EINVAL;
349         if (value == old_value)
350                 return 0;
351         kcontrol->private_value = (value << 8) | index;
352         err = snd_audigy2nx_led_update(mixer, value, index);
353         return err < 0 ? err : 1;
354 }
355 
356 static int snd_audigy2nx_led_resume(struct usb_mixer_elem_list *list)
357 {
358         int priv_value = list->kctl->private_value;
359 
360         return snd_audigy2nx_led_update(list->mixer, priv_value >> 8,
361                                         priv_value & 0xff);
362 }
363 
364 /* name and private_value are set dynamically */
365 static struct snd_kcontrol_new snd_audigy2nx_control = {
366         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
367         .info = snd_audigy2nx_led_info,
368         .get = snd_audigy2nx_led_get,
369         .put = snd_audigy2nx_led_put,
370 };
371 
372 static const char * const snd_audigy2nx_led_names[] = {
373         "CMSS LED Switch",
374         "Power LED Switch",
375         "Dolby Digital LED Switch",
376 };
377 
378 static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
379 {
380         int i, err;
381 
382         for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_led_names); ++i) {
383                 struct snd_kcontrol_new knew;
384 
385                 /* USB X-Fi S51 doesn't have a CMSS LED */
386                 if ((mixer->chip->usb_id == USB_ID(0x041e, 0x3042)) && i == 0)
387                         continue;
388                 /* USB X-Fi S51 Pro doesn't have one either */
389                 if ((mixer->chip->usb_id == USB_ID(0x041e, 0x30df)) && i == 0)
390                         continue;
391                 if (i > 1 && /* Live24ext has 2 LEDs only */
392                         (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
393                          mixer->chip->usb_id == USB_ID(0x041e, 0x3042) ||
394                          mixer->chip->usb_id == USB_ID(0x041e, 0x30df) ||
395                          mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
396                         break; 
397 
398                 knew = snd_audigy2nx_control;
399                 knew.name = snd_audigy2nx_led_names[i];
400                 knew.private_value = (1 << 8) | i; /* LED on as default */
401                 err = add_single_ctl_with_resume(mixer, 0,
402                                                  snd_audigy2nx_led_resume,
403                                                  &knew, NULL);
404                 if (err < 0)
405                         return err;
406         }
407         return 0;
408 }
409 
410 static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,
411                                     struct snd_info_buffer *buffer)
412 {
413         static const struct sb_jack {
414                 int unitid;
415                 const char *name;
416         }  jacks_audigy2nx[] = {
417                 {4,  "dig in "},
418                 {7,  "line in"},
419                 {19, "spk out"},
420                 {20, "hph out"},
421                 {-1, NULL}
422         }, jacks_live24ext[] = {
423                 {4,  "line in"}, /* &1=Line, &2=Mic*/
424                 {3,  "hph out"}, /* headphones */
425                 {0,  "RC     "}, /* last command, 6 bytes see rc_config above */
426                 {-1, NULL}
427         };
428         const struct sb_jack *jacks;
429         struct usb_mixer_interface *mixer = entry->private_data;
430         int i, err;
431         u8 buf[3];
432 
433         snd_iprintf(buffer, "%s jacks\n\n", mixer->chip->card->shortname);
434         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020))
435                 jacks = jacks_audigy2nx;
436         else if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
437                  mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
438                 jacks = jacks_live24ext;
439         else
440                 return;
441 
442         for (i = 0; jacks[i].name; ++i) {
443                 snd_iprintf(buffer, "%s: ", jacks[i].name);
444                 err = snd_usb_lock_shutdown(mixer->chip);
445                 if (err < 0)
446                         return;
447                 err = snd_usb_ctl_msg(mixer->chip->dev,
448                                       usb_rcvctrlpipe(mixer->chip->dev, 0),
449                                       UAC_GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
450                                       USB_RECIP_INTERFACE, 0,
451                                       jacks[i].unitid << 8, buf, 3);
452                 snd_usb_unlock_shutdown(mixer->chip);
453                 if (err == 3 && (buf[0] == 3 || buf[0] == 6))
454                         snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
455                 else
456                         snd_iprintf(buffer, "?\n");
457         }
458 }
459 
460 /* EMU0204 */
461 static int snd_emu0204_ch_switch_info(struct snd_kcontrol *kcontrol,
462                                       struct snd_ctl_elem_info *uinfo)
463 {
464         static const char * const texts[2] = {"1/2", "3/4"};
465 
466         return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
467 }
468 
469 static int snd_emu0204_ch_switch_get(struct snd_kcontrol *kcontrol,
470                                      struct snd_ctl_elem_value *ucontrol)
471 {
472         ucontrol->value.enumerated.item[0] = kcontrol->private_value;
473         return 0;
474 }
475 
476 static int snd_emu0204_ch_switch_update(struct usb_mixer_interface *mixer,
477                                         int value)
478 {
479         struct snd_usb_audio *chip = mixer->chip;
480         int err;
481         unsigned char buf[2];
482 
483         err = snd_usb_lock_shutdown(chip);
484         if (err < 0)
485                 return err;
486 
487         buf[0] = 0x01;
488         buf[1] = value ? 0x02 : 0x01;
489         err = snd_usb_ctl_msg(chip->dev,
490                       usb_sndctrlpipe(chip->dev, 0), UAC_SET_CUR,
491                       USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
492                       0x0400, 0x0e00, buf, 2);
493         snd_usb_unlock_shutdown(chip);
494         return err;
495 }
496 
497 static int snd_emu0204_ch_switch_put(struct snd_kcontrol *kcontrol,
498                                      struct snd_ctl_elem_value *ucontrol)
499 {
500         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
501         struct usb_mixer_interface *mixer = list->mixer;
502         unsigned int value = ucontrol->value.enumerated.item[0];
503         int err;
504 
505         if (value > 1)
506                 return -EINVAL;
507 
508         if (value == kcontrol->private_value)
509                 return 0;
510 
511         kcontrol->private_value = value;
512         err = snd_emu0204_ch_switch_update(mixer, value);
513         return err < 0 ? err : 1;
514 }
515 
516 static int snd_emu0204_ch_switch_resume(struct usb_mixer_elem_list *list)
517 {
518         return snd_emu0204_ch_switch_update(list->mixer,
519                                             list->kctl->private_value);
520 }
521 
522 static struct snd_kcontrol_new snd_emu0204_control = {
523         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
524         .name = "Front Jack Channels",
525         .info = snd_emu0204_ch_switch_info,
526         .get = snd_emu0204_ch_switch_get,
527         .put = snd_emu0204_ch_switch_put,
528         .private_value = 0,
529 };
530 
531 static int snd_emu0204_controls_create(struct usb_mixer_interface *mixer)
532 {
533         return add_single_ctl_with_resume(mixer, 0,
534                                           snd_emu0204_ch_switch_resume,
535                                           &snd_emu0204_control, NULL);
536 }
537 
538 /* ASUS Xonar U1 / U3 controls */
539 
540 static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol,
541                                    struct snd_ctl_elem_value *ucontrol)
542 {
543         ucontrol->value.integer.value[0] = !!(kcontrol->private_value & 0x02);
544         return 0;
545 }
546 
547 static int snd_xonar_u1_switch_update(struct usb_mixer_interface *mixer,
548                                       unsigned char status)
549 {
550         struct snd_usb_audio *chip = mixer->chip;
551         int err;
552 
553         err = snd_usb_lock_shutdown(chip);
554         if (err < 0)
555                 return err;
556         err = snd_usb_ctl_msg(chip->dev,
557                               usb_sndctrlpipe(chip->dev, 0), 0x08,
558                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
559                               50, 0, &status, 1);
560         snd_usb_unlock_shutdown(chip);
561         return err;
562 }
563 
564 static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
565                                    struct snd_ctl_elem_value *ucontrol)
566 {
567         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
568         u8 old_status, new_status;
569         int err;
570 
571         old_status = kcontrol->private_value;
572         if (ucontrol->value.integer.value[0])
573                 new_status = old_status | 0x02;
574         else
575                 new_status = old_status & ~0x02;
576         if (new_status == old_status)
577                 return 0;
578 
579         kcontrol->private_value = new_status;
580         err = snd_xonar_u1_switch_update(list->mixer, new_status);
581         return err < 0 ? err : 1;
582 }
583 
584 static int snd_xonar_u1_switch_resume(struct usb_mixer_elem_list *list)
585 {
586         return snd_xonar_u1_switch_update(list->mixer,
587                                           list->kctl->private_value);
588 }
589 
590 static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
591         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
592         .name = "Digital Playback Switch",
593         .info = snd_ctl_boolean_mono_info,
594         .get = snd_xonar_u1_switch_get,
595         .put = snd_xonar_u1_switch_put,
596         .private_value = 0x05,
597 };
598 
599 static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
600 {
601         return add_single_ctl_with_resume(mixer, 0,
602                                           snd_xonar_u1_switch_resume,
603                                           &snd_xonar_u1_output_switch, NULL);
604 }
605 
606 /* Digidesign Mbox 1 clock source switch (internal/spdif) */
607 
608 static int snd_mbox1_switch_get(struct snd_kcontrol *kctl,
609                                 struct snd_ctl_elem_value *ucontrol)
610 {
611         ucontrol->value.enumerated.item[0] = kctl->private_value;
612         return 0;
613 }
614 
615 static int snd_mbox1_switch_update(struct usb_mixer_interface *mixer, int val)
616 {
617         struct snd_usb_audio *chip = mixer->chip;
618         int err;
619         unsigned char buff[3];
620 
621         err = snd_usb_lock_shutdown(chip);
622         if (err < 0)
623                 return err;
624 
625         /* Prepare for magic command to toggle clock source */
626         err = snd_usb_ctl_msg(chip->dev,
627                                 usb_rcvctrlpipe(chip->dev, 0), 0x81,
628                                 USB_DIR_IN |
629                                 USB_TYPE_CLASS |
630                                 USB_RECIP_INTERFACE, 0x00, 0x500, buff, 1);
631         if (err < 0)
632                 goto err;
633         err = snd_usb_ctl_msg(chip->dev,
634                                 usb_rcvctrlpipe(chip->dev, 0), 0x81,
635                                 USB_DIR_IN |
636                                 USB_TYPE_CLASS |
637                                 USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
638         if (err < 0)
639                 goto err;
640 
641         /* 2 possibilities:     Internal    -> send sample rate
642          *                      S/PDIF sync -> send zeroes
643          * NB: Sample rate locked to 48kHz on purpose to
644          *     prevent user from resetting the sample rate
645          *     while S/PDIF sync is enabled and confusing
646          *     this configuration.
647          */
648         if (val == 0) {
649                 buff[0] = 0x80;
650                 buff[1] = 0xbb;
651                 buff[2] = 0x00;
652         } else {
653                 buff[0] = buff[1] = buff[2] = 0x00;
654         }
655 
656         /* Send the magic command to toggle the clock source */
657         err = snd_usb_ctl_msg(chip->dev,
658                                 usb_sndctrlpipe(chip->dev, 0), 0x1,
659                                 USB_TYPE_CLASS |
660                                 USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
661         if (err < 0)
662                 goto err;
663         err = snd_usb_ctl_msg(chip->dev,
664                                 usb_rcvctrlpipe(chip->dev, 0), 0x81,
665                                 USB_DIR_IN |
666                                 USB_TYPE_CLASS |
667                                 USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
668         if (err < 0)
669                 goto err;
670         err = snd_usb_ctl_msg(chip->dev,
671                                 usb_rcvctrlpipe(chip->dev, 0), 0x81,
672                                 USB_DIR_IN |
673                                 USB_TYPE_CLASS |
674                                 USB_RECIP_ENDPOINT, 0x100, 0x2, buff, 3);
675         if (err < 0)
676                 goto err;
677 
678 err:
679         snd_usb_unlock_shutdown(chip);
680         return err;
681 }
682 
683 static int snd_mbox1_switch_put(struct snd_kcontrol *kctl,
684                                 struct snd_ctl_elem_value *ucontrol)
685 {
686         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
687         struct usb_mixer_interface *mixer = list->mixer;
688         int err;
689         bool cur_val, new_val;
690 
691         cur_val = kctl->private_value;
692         new_val = ucontrol->value.enumerated.item[0];
693         if (cur_val == new_val)
694                 return 0;
695 
696         kctl->private_value = new_val;
697         err = snd_mbox1_switch_update(mixer, new_val);
698         return err < 0 ? err : 1;
699 }
700 
701 static int snd_mbox1_switch_info(struct snd_kcontrol *kcontrol,
702                                  struct snd_ctl_elem_info *uinfo)
703 {
704         static const char *const texts[2] = {
705                 "Internal",
706                 "S/PDIF"
707         };
708 
709         return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
710 }
711 
712 static int snd_mbox1_switch_resume(struct usb_mixer_elem_list *list)
713 {
714         return snd_mbox1_switch_update(list->mixer, list->kctl->private_value);
715 }
716 
717 static struct snd_kcontrol_new snd_mbox1_switch = {
718         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
719         .name = "Clock Source",
720         .index = 0,
721         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
722         .info = snd_mbox1_switch_info,
723         .get = snd_mbox1_switch_get,
724         .put = snd_mbox1_switch_put,
725         .private_value = 0
726 };
727 
728 static int snd_mbox1_create_sync_switch(struct usb_mixer_interface *mixer)
729 {
730         return add_single_ctl_with_resume(mixer, 0,
731                                           snd_mbox1_switch_resume,
732                                           &snd_mbox1_switch, NULL);
733 }
734 
735 /* Native Instruments device quirks */
736 
737 #define _MAKE_NI_CONTROL(bRequest,wIndex) ((bRequest) << 16 | (wIndex))
738 
739 static int snd_ni_control_init_val(struct usb_mixer_interface *mixer,
740                                    struct snd_kcontrol *kctl)
741 {
742         struct usb_device *dev = mixer->chip->dev;
743         unsigned int pval = kctl->private_value;
744         u8 value;
745         int err;
746 
747         err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
748                               (pval >> 16) & 0xff,
749                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
750                               0, pval & 0xffff, &value, 1);
751         if (err < 0) {
752                 dev_err(&dev->dev,
753                         "unable to issue vendor read request (ret = %d)", err);
754                 return err;
755         }
756 
757         kctl->private_value |= (value << 24);
758         return 0;
759 }
760 
761 static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
762                                              struct snd_ctl_elem_value *ucontrol)
763 {
764         ucontrol->value.integer.value[0] = kcontrol->private_value >> 24;
765         return 0;
766 }
767 
768 static int snd_ni_update_cur_val(struct usb_mixer_elem_list *list)
769 {
770         struct snd_usb_audio *chip = list->mixer->chip;
771         unsigned int pval = list->kctl->private_value;
772         int err;
773 
774         err = snd_usb_lock_shutdown(chip);
775         if (err < 0)
776                 return err;
777         err = usb_control_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
778                               (pval >> 16) & 0xff,
779                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
780                               pval >> 24, pval & 0xffff, NULL, 0, 1000);
781         snd_usb_unlock_shutdown(chip);
782         return err;
783 }
784 
785 static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
786                                              struct snd_ctl_elem_value *ucontrol)
787 {
788         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
789         u8 oldval = (kcontrol->private_value >> 24) & 0xff;
790         u8 newval = ucontrol->value.integer.value[0];
791         int err;
792 
793         if (oldval == newval)
794                 return 0;
795 
796         kcontrol->private_value &= ~(0xff << 24);
797         kcontrol->private_value |= (unsigned int)newval << 24;
798         err = snd_ni_update_cur_val(list);
799         return err < 0 ? err : 1;
800 }
801 
802 static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
803         {
804                 .name = "Direct Thru Channel A",
805                 .private_value = _MAKE_NI_CONTROL(0x01, 0x03),
806         },
807         {
808                 .name = "Direct Thru Channel B",
809                 .private_value = _MAKE_NI_CONTROL(0x01, 0x05),
810         },
811         {
812                 .name = "Phono Input Channel A",
813                 .private_value = _MAKE_NI_CONTROL(0x02, 0x03),
814         },
815         {
816                 .name = "Phono Input Channel B",
817                 .private_value = _MAKE_NI_CONTROL(0x02, 0x05),
818         },
819 };
820 
821 static struct snd_kcontrol_new snd_nativeinstruments_ta10_mixers[] = {
822         {
823                 .name = "Direct Thru Channel A",
824                 .private_value = _MAKE_NI_CONTROL(0x01, 0x03),
825         },
826         {
827                 .name = "Direct Thru Channel B",
828                 .private_value = _MAKE_NI_CONTROL(0x01, 0x05),
829         },
830         {
831                 .name = "Direct Thru Channel C",
832                 .private_value = _MAKE_NI_CONTROL(0x01, 0x07),
833         },
834         {
835                 .name = "Direct Thru Channel D",
836                 .private_value = _MAKE_NI_CONTROL(0x01, 0x09),
837         },
838         {
839                 .name = "Phono Input Channel A",
840                 .private_value = _MAKE_NI_CONTROL(0x02, 0x03),
841         },
842         {
843                 .name = "Phono Input Channel B",
844                 .private_value = _MAKE_NI_CONTROL(0x02, 0x05),
845         },
846         {
847                 .name = "Phono Input Channel C",
848                 .private_value = _MAKE_NI_CONTROL(0x02, 0x07),
849         },
850         {
851                 .name = "Phono Input Channel D",
852                 .private_value = _MAKE_NI_CONTROL(0x02, 0x09),
853         },
854 };
855 
856 static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
857                                               const struct snd_kcontrol_new *kc,
858                                               unsigned int count)
859 {
860         int i, err = 0;
861         struct snd_kcontrol_new template = {
862                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
863                 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
864                 .get = snd_nativeinstruments_control_get,
865                 .put = snd_nativeinstruments_control_put,
866                 .info = snd_ctl_boolean_mono_info,
867         };
868 
869         for (i = 0; i < count; i++) {
870                 struct usb_mixer_elem_list *list;
871 
872                 template.name = kc[i].name;
873                 template.private_value = kc[i].private_value;
874 
875                 err = add_single_ctl_with_resume(mixer, 0,
876                                                  snd_ni_update_cur_val,
877                                                  &template, &list);
878                 if (err < 0)
879                         break;
880                 snd_ni_control_init_val(mixer, list->kctl);
881         }
882 
883         return err;
884 }
885 
886 /* M-Audio FastTrack Ultra quirks */
887 /* FTU Effect switch (also used by C400/C600) */
888 static int snd_ftu_eff_switch_info(struct snd_kcontrol *kcontrol,
889                                         struct snd_ctl_elem_info *uinfo)
890 {
891         static const char *const texts[8] = {
892                 "Room 1", "Room 2", "Room 3", "Hall 1",
893                 "Hall 2", "Plate", "Delay", "Echo"
894         };
895 
896         return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
897 }
898 
899 static int snd_ftu_eff_switch_init(struct usb_mixer_interface *mixer,
900                                    struct snd_kcontrol *kctl)
901 {
902         struct usb_device *dev = mixer->chip->dev;
903         unsigned int pval = kctl->private_value;
904         int err;
905         unsigned char value[2];
906 
907         value[0] = 0x00;
908         value[1] = 0x00;
909 
910         err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
911                               USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
912                               pval & 0xff00,
913                               snd_usb_ctrl_intf(mixer->chip) | ((pval & 0xff) << 8),
914                               value, 2);
915         if (err < 0)
916                 return err;
917 
918         kctl->private_value |= value[0] << 24;
919         return 0;
920 }
921 
922 static int snd_ftu_eff_switch_get(struct snd_kcontrol *kctl,
923                                         struct snd_ctl_elem_value *ucontrol)
924 {
925         ucontrol->value.enumerated.item[0] = kctl->private_value >> 24;
926         return 0;
927 }
928 
929 static int snd_ftu_eff_switch_update(struct usb_mixer_elem_list *list)
930 {
931         struct snd_usb_audio *chip = list->mixer->chip;
932         unsigned int pval = list->kctl->private_value;
933         unsigned char value[2];
934         int err;
935 
936         value[0] = pval >> 24;
937         value[1] = 0;
938 
939         err = snd_usb_lock_shutdown(chip);
940         if (err < 0)
941                 return err;
942         err = snd_usb_ctl_msg(chip->dev,
943                               usb_sndctrlpipe(chip->dev, 0),
944                               UAC_SET_CUR,
945                               USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
946                               pval & 0xff00,
947                               snd_usb_ctrl_intf(chip) | ((pval & 0xff) << 8),
948                               value, 2);
949         snd_usb_unlock_shutdown(chip);
950         return err;
951 }
952 
953 static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
954                                         struct snd_ctl_elem_value *ucontrol)
955 {
956         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
957         unsigned int pval = list->kctl->private_value;
958         int cur_val, err, new_val;
959 
960         cur_val = pval >> 24;
961         new_val = ucontrol->value.enumerated.item[0];
962         if (cur_val == new_val)
963                 return 0;
964 
965         kctl->private_value &= ~(0xff << 24);
966         kctl->private_value |= new_val << 24;
967         err = snd_ftu_eff_switch_update(list);
968         return err < 0 ? err : 1;
969 }
970 
971 static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
972         int validx, int bUnitID)
973 {
974         static struct snd_kcontrol_new template = {
975                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
976                 .name = "Effect Program Switch",
977                 .index = 0,
978                 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
979                 .info = snd_ftu_eff_switch_info,
980                 .get = snd_ftu_eff_switch_get,
981                 .put = snd_ftu_eff_switch_put
982         };
983         struct usb_mixer_elem_list *list;
984         int err;
985 
986         err = add_single_ctl_with_resume(mixer, bUnitID,
987                                          snd_ftu_eff_switch_update,
988                                          &template, &list);
989         if (err < 0)
990                 return err;
991         list->kctl->private_value = (validx << 8) | bUnitID;
992         snd_ftu_eff_switch_init(mixer, list->kctl);
993         return 0;
994 }
995 
996 /* Create volume controls for FTU devices*/
997 static int snd_ftu_create_volume_ctls(struct usb_mixer_interface *mixer)
998 {
999         char name[64];
1000         unsigned int control, cmask;
1001         int in, out, err;
1002 
1003         const unsigned int id = 5;
1004         const int val_type = USB_MIXER_S16;
1005 
1006         for (out = 0; out < 8; out++) {
1007                 control = out + 1;
1008                 for (in = 0; in < 8; in++) {
1009                         cmask = 1 << in;
1010                         snprintf(name, sizeof(name),
1011                                 "AIn%d - Out%d Capture Volume",
1012                                 in  + 1, out + 1);
1013                         err = snd_create_std_mono_ctl(mixer, id, control,
1014                                                         cmask, val_type, name,
1015                                                         &snd_usb_mixer_vol_tlv);
1016                         if (err < 0)
1017                                 return err;
1018                 }
1019                 for (in = 8; in < 16; in++) {
1020                         cmask = 1 << in;
1021                         snprintf(name, sizeof(name),
1022                                 "DIn%d - Out%d Playback Volume",
1023                                 in - 7, out + 1);
1024                         err = snd_create_std_mono_ctl(mixer, id, control,
1025                                                         cmask, val_type, name,
1026                                                         &snd_usb_mixer_vol_tlv);
1027                         if (err < 0)
1028                                 return err;
1029                 }
1030         }
1031 
1032         return 0;
1033 }
1034 
1035 /* This control needs a volume quirk, see mixer.c */
1036 static int snd_ftu_create_effect_volume_ctl(struct usb_mixer_interface *mixer)
1037 {
1038         static const char name[] = "Effect Volume";
1039         const unsigned int id = 6;
1040         const int val_type = USB_MIXER_U8;
1041         const unsigned int control = 2;
1042         const unsigned int cmask = 0;
1043 
1044         return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1045                                         name, snd_usb_mixer_vol_tlv);
1046 }
1047 
1048 /* This control needs a volume quirk, see mixer.c */
1049 static int snd_ftu_create_effect_duration_ctl(struct usb_mixer_interface *mixer)
1050 {
1051         static const char name[] = "Effect Duration";
1052         const unsigned int id = 6;
1053         const int val_type = USB_MIXER_S16;
1054         const unsigned int control = 3;
1055         const unsigned int cmask = 0;
1056 
1057         return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1058                                         name, snd_usb_mixer_vol_tlv);
1059 }
1060 
1061 /* This control needs a volume quirk, see mixer.c */
1062 static int snd_ftu_create_effect_feedback_ctl(struct usb_mixer_interface *mixer)
1063 {
1064         static const char name[] = "Effect Feedback Volume";
1065         const unsigned int id = 6;
1066         const int val_type = USB_MIXER_U8;
1067         const unsigned int control = 4;
1068         const unsigned int cmask = 0;
1069 
1070         return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1071                                         name, NULL);
1072 }
1073 
1074 static int snd_ftu_create_effect_return_ctls(struct usb_mixer_interface *mixer)
1075 {
1076         unsigned int cmask;
1077         int err, ch;
1078         char name[48];
1079 
1080         const unsigned int id = 7;
1081         const int val_type = USB_MIXER_S16;
1082         const unsigned int control = 7;
1083 
1084         for (ch = 0; ch < 4; ++ch) {
1085                 cmask = 1 << ch;
1086                 snprintf(name, sizeof(name),
1087                         "Effect Return %d Volume", ch + 1);
1088                 err = snd_create_std_mono_ctl(mixer, id, control,
1089                                                 cmask, val_type, name,
1090                                                 snd_usb_mixer_vol_tlv);
1091                 if (err < 0)
1092                         return err;
1093         }
1094 
1095         return 0;
1096 }
1097 
1098 static int snd_ftu_create_effect_send_ctls(struct usb_mixer_interface *mixer)
1099 {
1100         unsigned int  cmask;
1101         int err, ch;
1102         char name[48];
1103 
1104         const unsigned int id = 5;
1105         const int val_type = USB_MIXER_S16;
1106         const unsigned int control = 9;
1107 
1108         for (ch = 0; ch < 8; ++ch) {
1109                 cmask = 1 << ch;
1110                 snprintf(name, sizeof(name),
1111                         "Effect Send AIn%d Volume", ch + 1);
1112                 err = snd_create_std_mono_ctl(mixer, id, control, cmask,
1113                                                 val_type, name,
1114                                                 snd_usb_mixer_vol_tlv);
1115                 if (err < 0)
1116                         return err;
1117         }
1118         for (ch = 8; ch < 16; ++ch) {
1119                 cmask = 1 << ch;
1120                 snprintf(name, sizeof(name),
1121                         "Effect Send DIn%d Volume", ch - 7);
1122                 err = snd_create_std_mono_ctl(mixer, id, control, cmask,
1123                                                 val_type, name,
1124                                                 snd_usb_mixer_vol_tlv);
1125                 if (err < 0)
1126                         return err;
1127         }
1128         return 0;
1129 }
1130 
1131 static int snd_ftu_create_mixer(struct usb_mixer_interface *mixer)
1132 {
1133         int err;
1134 
1135         err = snd_ftu_create_volume_ctls(mixer);
1136         if (err < 0)
1137                 return err;
1138 
1139         err = snd_ftu_create_effect_switch(mixer, 1, 6);
1140         if (err < 0)
1141                 return err;
1142 
1143         err = snd_ftu_create_effect_volume_ctl(mixer);
1144         if (err < 0)
1145                 return err;
1146 
1147         err = snd_ftu_create_effect_duration_ctl(mixer);
1148         if (err < 0)
1149                 return err;
1150 
1151         err = snd_ftu_create_effect_feedback_ctl(mixer);
1152         if (err < 0)
1153                 return err;
1154 
1155         err = snd_ftu_create_effect_return_ctls(mixer);
1156         if (err < 0)
1157                 return err;
1158 
1159         err = snd_ftu_create_effect_send_ctls(mixer);
1160         if (err < 0)
1161                 return err;
1162 
1163         return 0;
1164 }
1165 
1166 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
1167                                unsigned char samplerate_id)
1168 {
1169         struct usb_mixer_interface *mixer;
1170         struct usb_mixer_elem_info *cval;
1171         int unitid = 12; /* SamleRate ExtensionUnit ID */
1172 
1173         list_for_each_entry(mixer, &chip->mixer_list, list) {
1174                 cval = (struct usb_mixer_elem_info *)mixer->id_elems[unitid];
1175                 if (cval) {
1176                         snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR,
1177                                                     cval->control << 8,
1178                                                     samplerate_id);
1179                         snd_usb_mixer_notify_id(mixer, unitid);
1180                 }
1181                 break;
1182         }
1183 }
1184 
1185 /* M-Audio Fast Track C400/C600 */
1186 /* C400/C600 volume controls, this control needs a volume quirk, see mixer.c */
1187 static int snd_c400_create_vol_ctls(struct usb_mixer_interface *mixer)
1188 {
1189         char name[64];
1190         unsigned int cmask, offset;
1191         int out, chan, err;
1192         int num_outs = 0;
1193         int num_ins = 0;
1194 
1195         const unsigned int id = 0x40;
1196         const int val_type = USB_MIXER_S16;
1197         const int control = 1;
1198 
1199         switch (mixer->chip->usb_id) {
1200         case USB_ID(0x0763, 0x2030):
1201                 num_outs = 6;
1202                 num_ins = 4;
1203                 break;
1204         case USB_ID(0x0763, 0x2031):
1205                 num_outs = 8;
1206                 num_ins = 6;
1207                 break;
1208         }
1209 
1210         for (chan = 0; chan < num_outs + num_ins; chan++) {
1211                 for (out = 0; out < num_outs; out++) {
1212                         if (chan < num_outs) {
1213                                 snprintf(name, sizeof(name),
1214                                         "PCM%d-Out%d Playback Volume",
1215                                         chan + 1, out + 1);
1216                         } else {
1217                                 snprintf(name, sizeof(name),
1218                                         "In%d-Out%d Playback Volume",
1219                                         chan - num_outs + 1, out + 1);
1220                         }
1221 
1222                         cmask = (out == 0) ? 0 : 1 << (out - 1);
1223                         offset = chan * num_outs;
1224                         err = snd_create_std_mono_ctl_offset(mixer, id, control,
1225                                                 cmask, val_type, offset, name,
1226                                                 &snd_usb_mixer_vol_tlv);
1227                         if (err < 0)
1228                                 return err;
1229                 }
1230         }
1231 
1232         return 0;
1233 }
1234 
1235 /* This control needs a volume quirk, see mixer.c */
1236 static int snd_c400_create_effect_volume_ctl(struct usb_mixer_interface *mixer)
1237 {
1238         static const char name[] = "Effect Volume";
1239         const unsigned int id = 0x43;
1240         const int val_type = USB_MIXER_U8;
1241         const unsigned int control = 3;
1242         const unsigned int cmask = 0;
1243 
1244         return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1245                                         name, snd_usb_mixer_vol_tlv);
1246 }
1247 
1248 /* This control needs a volume quirk, see mixer.c */
1249 static int snd_c400_create_effect_duration_ctl(struct usb_mixer_interface *mixer)
1250 {
1251         static const char name[] = "Effect Duration";
1252         const unsigned int id = 0x43;
1253         const int val_type = USB_MIXER_S16;
1254         const unsigned int control = 4;
1255         const unsigned int cmask = 0;
1256 
1257         return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1258                                         name, snd_usb_mixer_vol_tlv);
1259 }
1260 
1261 /* This control needs a volume quirk, see mixer.c */
1262 static int snd_c400_create_effect_feedback_ctl(struct usb_mixer_interface *mixer)
1263 {
1264         static const char name[] = "Effect Feedback Volume";
1265         const unsigned int id = 0x43;
1266         const int val_type = USB_MIXER_U8;
1267         const unsigned int control = 5;
1268         const unsigned int cmask = 0;
1269 
1270         return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
1271                                         name, NULL);
1272 }
1273 
1274 static int snd_c400_create_effect_vol_ctls(struct usb_mixer_interface *mixer)
1275 {
1276         char name[64];
1277         unsigned int cmask;
1278         int chan, err;
1279         int num_outs = 0;
1280         int num_ins = 0;
1281 
1282         const unsigned int id = 0x42;
1283         const int val_type = USB_MIXER_S16;
1284         const int control = 1;
1285 
1286         switch (mixer->chip->usb_id) {
1287         case USB_ID(0x0763, 0x2030):
1288                 num_outs = 6;
1289                 num_ins = 4;
1290                 break;
1291         case USB_ID(0x0763, 0x2031):
1292                 num_outs = 8;
1293                 num_ins = 6;
1294                 break;
1295         }
1296 
1297         for (chan = 0; chan < num_outs + num_ins; chan++) {
1298                 if (chan < num_outs) {
1299                         snprintf(name, sizeof(name),
1300                                 "Effect Send DOut%d",
1301                                 chan + 1);
1302                 } else {
1303                         snprintf(name, sizeof(name),
1304                                 "Effect Send AIn%d",
1305                                 chan - num_outs + 1);
1306                 }
1307 
1308                 cmask = (chan == 0) ? 0 : 1 << (chan - 1);
1309                 err = snd_create_std_mono_ctl(mixer, id, control,
1310                                                 cmask, val_type, name,
1311                                                 &snd_usb_mixer_vol_tlv);
1312                 if (err < 0)
1313                         return err;
1314         }
1315 
1316         return 0;
1317 }
1318 
1319 static int snd_c400_create_effect_ret_vol_ctls(struct usb_mixer_interface *mixer)
1320 {
1321         char name[64];
1322         unsigned int cmask;
1323         int chan, err;
1324         int num_outs = 0;
1325         int offset = 0;
1326 
1327         const unsigned int id = 0x40;
1328         const int val_type = USB_MIXER_S16;
1329         const int control = 1;
1330 
1331         switch (mixer->chip->usb_id) {
1332         case USB_ID(0x0763, 0x2030):
1333                 num_outs = 6;
1334                 offset = 0x3c;
1335                 /* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
1336                 break;
1337         case USB_ID(0x0763, 0x2031):
1338                 num_outs = 8;
1339                 offset = 0x70;
1340                 /* { 0x70, 0x79, 0x72, 0x7b, 0x74, 0x7d, 0x76, 0x7f } */
1341                 break;
1342         }
1343 
1344         for (chan = 0; chan < num_outs; chan++) {
1345                 snprintf(name, sizeof(name),
1346                         "Effect Return %d",
1347                         chan + 1);
1348 
1349                 cmask = (chan == 0) ? 0 :
1350                         1 << (chan + (chan % 2) * num_outs - 1);
1351                 err = snd_create_std_mono_ctl_offset(mixer, id, control,
1352                                                 cmask, val_type, offset, name,
1353                                                 &snd_usb_mixer_vol_tlv);
1354                 if (err < 0)
1355                         return err;
1356         }
1357 
1358         return 0;
1359 }
1360 
1361 static int snd_c400_create_mixer(struct usb_mixer_interface *mixer)
1362 {
1363         int err;
1364 
1365         err = snd_c400_create_vol_ctls(mixer);
1366         if (err < 0)
1367                 return err;
1368 
1369         err = snd_c400_create_effect_vol_ctls(mixer);
1370         if (err < 0)
1371                 return err;
1372 
1373         err = snd_c400_create_effect_ret_vol_ctls(mixer);
1374         if (err < 0)
1375                 return err;
1376 
1377         err = snd_ftu_create_effect_switch(mixer, 2, 0x43);
1378         if (err < 0)
1379                 return err;
1380 
1381         err = snd_c400_create_effect_volume_ctl(mixer);
1382         if (err < 0)
1383                 return err;
1384 
1385         err = snd_c400_create_effect_duration_ctl(mixer);
1386         if (err < 0)
1387                 return err;
1388 
1389         err = snd_c400_create_effect_feedback_ctl(mixer);
1390         if (err < 0)
1391                 return err;
1392 
1393         return 0;
1394 }
1395 
1396 /*
1397  * The mixer units for Ebox-44 are corrupt, and even where they
1398  * are valid they presents mono controls as L and R channels of
1399  * stereo. So we provide a good mixer here.
1400  */
1401 static struct std_mono_table ebox44_table[] = {
1402         {
1403                 .unitid = 4,
1404                 .control = 1,
1405                 .cmask = 0x0,
1406                 .val_type = USB_MIXER_INV_BOOLEAN,
1407                 .name = "Headphone Playback Switch"
1408         },
1409         {
1410                 .unitid = 4,
1411                 .control = 2,
1412                 .cmask = 0x1,
1413                 .val_type = USB_MIXER_S16,
1414                 .name = "Headphone A Mix Playback Volume"
1415         },
1416         {
1417                 .unitid = 4,
1418                 .control = 2,
1419                 .cmask = 0x2,
1420                 .val_type = USB_MIXER_S16,
1421                 .name = "Headphone B Mix Playback Volume"
1422         },
1423 
1424         {
1425                 .unitid = 7,
1426                 .control = 1,
1427                 .cmask = 0x0,
1428                 .val_type = USB_MIXER_INV_BOOLEAN,
1429                 .name = "Output Playback Switch"
1430         },
1431         {
1432                 .unitid = 7,
1433                 .control = 2,
1434                 .cmask = 0x1,
1435                 .val_type = USB_MIXER_S16,
1436                 .name = "Output A Playback Volume"
1437         },
1438         {
1439                 .unitid = 7,
1440                 .control = 2,
1441                 .cmask = 0x2,
1442                 .val_type = USB_MIXER_S16,
1443                 .name = "Output B Playback Volume"
1444         },
1445 
1446         {
1447                 .unitid = 10,
1448                 .control = 1,
1449                 .cmask = 0x0,
1450                 .val_type = USB_MIXER_INV_BOOLEAN,
1451                 .name = "Input Capture Switch"
1452         },
1453         {
1454                 .unitid = 10,
1455                 .control = 2,
1456                 .cmask = 0x1,
1457                 .val_type = USB_MIXER_S16,
1458                 .name = "Input A Capture Volume"
1459         },
1460         {
1461                 .unitid = 10,
1462                 .control = 2,
1463                 .cmask = 0x2,
1464                 .val_type = USB_MIXER_S16,
1465                 .name = "Input B Capture Volume"
1466         },
1467 
1468         {}
1469 };
1470 
1471 /* Audio Advantage Micro II findings:
1472  *
1473  * Mapping spdif AES bits to vendor register.bit:
1474  * AES0: [0 0 0 0 2.3 2.2 2.1 2.0] - default 0x00
1475  * AES1: [3.3 3.2.3.1.3.0 2.7 2.6 2.5 2.4] - default: 0x01
1476  * AES2: [0 0 0 0 0 0 0 0]
1477  * AES3: [0 0 0 0 0 0 x 0] - 'x' bit is set basing on standard usb request
1478  *                           (UAC_EP_CS_ATTR_SAMPLE_RATE) for Audio Devices
1479  *
1480  * power on values:
1481  * r2: 0x10
1482  * r3: 0x20 (b7 is zeroed just before playback (except IEC61937) and set
1483  *           just after it to 0xa0, presumably it disables/mutes some analog
1484  *           parts when there is no audio.)
1485  * r9: 0x28
1486  *
1487  * Optical transmitter on/off:
1488  * vendor register.bit: 9.1
1489  * 0 - on (0x28 register value)
1490  * 1 - off (0x2a register value)
1491  *
1492  */
1493 static int snd_microii_spdif_info(struct snd_kcontrol *kcontrol,
1494         struct snd_ctl_elem_info *uinfo)
1495 {
1496         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
1497         uinfo->count = 1;
1498         return 0;
1499 }
1500 
1501 static int snd_microii_spdif_default_get(struct snd_kcontrol *kcontrol,
1502         struct snd_ctl_elem_value *ucontrol)
1503 {
1504         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1505         struct snd_usb_audio *chip = list->mixer->chip;
1506         int err;
1507         struct usb_interface *iface;
1508         struct usb_host_interface *alts;
1509         unsigned int ep;
1510         unsigned char data[3];
1511         int rate;
1512 
1513         err = snd_usb_lock_shutdown(chip);
1514         if (err < 0)
1515                 return err;
1516 
1517         ucontrol->value.iec958.status[0] = kcontrol->private_value & 0xff;
1518         ucontrol->value.iec958.status[1] = (kcontrol->private_value >> 8) & 0xff;
1519         ucontrol->value.iec958.status[2] = 0x00;
1520 
1521         /* use known values for that card: interface#1 altsetting#1 */
1522         iface = usb_ifnum_to_if(chip->dev, 1);
1523         if (!iface || iface->num_altsetting < 2)
1524                 return -EINVAL;
1525         alts = &iface->altsetting[1];
1526         if (get_iface_desc(alts)->bNumEndpoints < 1)
1527                 return -EINVAL;
1528         ep = get_endpoint(alts, 0)->bEndpointAddress;
1529 
1530         err = snd_usb_ctl_msg(chip->dev,
1531                         usb_rcvctrlpipe(chip->dev, 0),
1532                         UAC_GET_CUR,
1533                         USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN,
1534                         UAC_EP_CS_ATTR_SAMPLE_RATE << 8,
1535                         ep,
1536                         data,
1537                         sizeof(data));
1538         if (err < 0)
1539                 goto end;
1540 
1541         rate = data[0] | (data[1] << 8) | (data[2] << 16);
1542         ucontrol->value.iec958.status[3] = (rate == 48000) ?
1543                         IEC958_AES3_CON_FS_48000 : IEC958_AES3_CON_FS_44100;
1544 
1545         err = 0;
1546  end:
1547         snd_usb_unlock_shutdown(chip);
1548         return err;
1549 }
1550 
1551 static int snd_microii_spdif_default_update(struct usb_mixer_elem_list *list)
1552 {
1553         struct snd_usb_audio *chip = list->mixer->chip;
1554         unsigned int pval = list->kctl->private_value;
1555         u8 reg;
1556         int err;
1557 
1558         err = snd_usb_lock_shutdown(chip);
1559         if (err < 0)
1560                 return err;
1561 
1562         reg = ((pval >> 4) & 0xf0) | (pval & 0x0f);
1563         err = snd_usb_ctl_msg(chip->dev,
1564                         usb_sndctrlpipe(chip->dev, 0),
1565                         UAC_SET_CUR,
1566                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1567                         reg,
1568                         2,
1569                         NULL,
1570                         0);
1571         if (err < 0)
1572                 goto end;
1573 
1574         reg = (pval & IEC958_AES0_NONAUDIO) ? 0xa0 : 0x20;
1575         reg |= (pval >> 12) & 0x0f;
1576         err = snd_usb_ctl_msg(chip->dev,
1577                         usb_sndctrlpipe(chip->dev, 0),
1578                         UAC_SET_CUR,
1579                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1580                         reg,
1581                         3,
1582                         NULL,
1583                         0);
1584         if (err < 0)
1585                 goto end;
1586 
1587  end:
1588         snd_usb_unlock_shutdown(chip);
1589         return err;
1590 }
1591 
1592 static int snd_microii_spdif_default_put(struct snd_kcontrol *kcontrol,
1593         struct snd_ctl_elem_value *ucontrol)
1594 {
1595         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1596         unsigned int pval, pval_old;
1597         int err;
1598 
1599         pval = pval_old = kcontrol->private_value;
1600         pval &= 0xfffff0f0;
1601         pval |= (ucontrol->value.iec958.status[1] & 0x0f) << 8;
1602         pval |= (ucontrol->value.iec958.status[0] & 0x0f);
1603 
1604         pval &= 0xffff0fff;
1605         pval |= (ucontrol->value.iec958.status[1] & 0xf0) << 8;
1606 
1607         /* The frequency bits in AES3 cannot be set via register access. */
1608 
1609         /* Silently ignore any bits from the request that cannot be set. */
1610 
1611         if (pval == pval_old)
1612                 return 0;
1613 
1614         kcontrol->private_value = pval;
1615         err = snd_microii_spdif_default_update(list);
1616         return err < 0 ? err : 1;
1617 }
1618 
1619 static int snd_microii_spdif_mask_get(struct snd_kcontrol *kcontrol,
1620         struct snd_ctl_elem_value *ucontrol)
1621 {
1622         ucontrol->value.iec958.status[0] = 0x0f;
1623         ucontrol->value.iec958.status[1] = 0xff;
1624         ucontrol->value.iec958.status[2] = 0x00;
1625         ucontrol->value.iec958.status[3] = 0x00;
1626 
1627         return 0;
1628 }
1629 
1630 static int snd_microii_spdif_switch_get(struct snd_kcontrol *kcontrol,
1631         struct snd_ctl_elem_value *ucontrol)
1632 {
1633         ucontrol->value.integer.value[0] = !(kcontrol->private_value & 0x02);
1634 
1635         return 0;
1636 }
1637 
1638 static int snd_microii_spdif_switch_update(struct usb_mixer_elem_list *list)
1639 {
1640         struct snd_usb_audio *chip = list->mixer->chip;
1641         u8 reg = list->kctl->private_value;
1642         int err;
1643 
1644         err = snd_usb_lock_shutdown(chip);
1645         if (err < 0)
1646                 return err;
1647 
1648         err = snd_usb_ctl_msg(chip->dev,
1649                         usb_sndctrlpipe(chip->dev, 0),
1650                         UAC_SET_CUR,
1651                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1652                         reg,
1653                         9,
1654                         NULL,
1655                         0);
1656 
1657         snd_usb_unlock_shutdown(chip);
1658         return err;
1659 }
1660 
1661 static int snd_microii_spdif_switch_put(struct snd_kcontrol *kcontrol,
1662         struct snd_ctl_elem_value *ucontrol)
1663 {
1664         struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
1665         u8 reg;
1666         int err;
1667 
1668         reg = ucontrol->value.integer.value[0] ? 0x28 : 0x2a;
1669         if (reg != list->kctl->private_value)
1670                 return 0;
1671 
1672         kcontrol->private_value = reg;
1673         err = snd_microii_spdif_switch_update(list);
1674         return err < 0 ? err : 1;
1675 }
1676 
1677 static struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
1678         {
1679                 .iface =    SNDRV_CTL_ELEM_IFACE_PCM,
1680                 .name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
1681                 .info =     snd_microii_spdif_info,
1682                 .get =      snd_microii_spdif_default_get,
1683                 .put =      snd_microii_spdif_default_put,
1684                 .private_value = 0x00000100UL,/* reset value */
1685         },
1686         {
1687                 .access =   SNDRV_CTL_ELEM_ACCESS_READ,
1688                 .iface =    SNDRV_CTL_ELEM_IFACE_PCM,
1689                 .name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
1690                 .info =     snd_microii_spdif_info,
1691                 .get =      snd_microii_spdif_mask_get,
1692         },
1693         {
1694                 .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
1695                 .name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
1696                 .info =     snd_ctl_boolean_mono_info,
1697                 .get =      snd_microii_spdif_switch_get,
1698                 .put =      snd_microii_spdif_switch_put,
1699                 .private_value = 0x00000028UL,/* reset value */
1700         }
1701 };
1702 
1703 static int snd_microii_controls_create(struct usb_mixer_interface *mixer)
1704 {
1705         int err, i;
1706         static usb_mixer_elem_resume_func_t resume_funcs[] = {
1707                 snd_microii_spdif_default_update,
1708                 NULL,
1709                 snd_microii_spdif_switch_update
1710         };
1711 
1712         for (i = 0; i < ARRAY_SIZE(snd_microii_mixer_spdif); ++i) {
1713                 err = add_single_ctl_with_resume(mixer, 0,
1714                                                  resume_funcs[i],
1715                                                  &snd_microii_mixer_spdif[i],
1716                                                  NULL);
1717                 if (err < 0)
1718                         return err;
1719         }
1720 
1721         return 0;
1722 }
1723 
1724 int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
1725 {
1726         int err = 0;
1727         struct snd_info_entry *entry;
1728 
1729         if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0)
1730                 return err;
1731 
1732         switch (mixer->chip->usb_id) {
1733         /* Tascam US-16x08 */
1734         case USB_ID(0x0644, 0x8047):
1735                 err = snd_us16x08_controls_create(mixer);
1736                 break;
1737         case USB_ID(0x041e, 0x3020):
1738         case USB_ID(0x041e, 0x3040):
1739         case USB_ID(0x041e, 0x3042):
1740         case USB_ID(0x041e, 0x30df):
1741         case USB_ID(0x041e, 0x3048):
1742                 err = snd_audigy2nx_controls_create(mixer);
1743                 if (err < 0)
1744                         break;
1745                 if (!snd_card_proc_new(mixer->chip->card, "audigy2nx", &entry))
1746                         snd_info_set_text_ops(entry, mixer,
1747                                               snd_audigy2nx_proc_read);
1748                 break;
1749 
1750         /* EMU0204 */
1751         case USB_ID(0x041e, 0x3f19):
1752                 err = snd_emu0204_controls_create(mixer);
1753                 if (err < 0)
1754                         break;
1755                 break;
1756 
1757         case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
1758         case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */
1759                 err = snd_c400_create_mixer(mixer);
1760                 break;
1761 
1762         case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
1763         case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
1764                 err = snd_ftu_create_mixer(mixer);
1765                 break;
1766 
1767         case USB_ID(0x0b05, 0x1739): /* ASUS Xonar U1 */
1768         case USB_ID(0x0b05, 0x1743): /* ASUS Xonar U1 (2) */
1769         case USB_ID(0x0b05, 0x17a0): /* ASUS Xonar U3 */
1770                 err = snd_xonar_u1_controls_create(mixer);
1771                 break;
1772 
1773         case USB_ID(0x0d8c, 0x0103): /* Audio Advantage Micro II */
1774                 err = snd_microii_controls_create(mixer);
1775                 break;
1776 
1777         case USB_ID(0x0dba, 0x1000): /* Digidesign Mbox 1 */
1778                 err = snd_mbox1_create_sync_switch(mixer);
1779                 break;
1780 
1781         case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */
1782                 err = snd_nativeinstruments_create_mixer(mixer,
1783                                 snd_nativeinstruments_ta6_mixers,
1784                                 ARRAY_SIZE(snd_nativeinstruments_ta6_mixers));
1785                 break;
1786 
1787         case USB_ID(0x17cc, 0x1021): /* Traktor Audio 10 */
1788                 err = snd_nativeinstruments_create_mixer(mixer,
1789                                 snd_nativeinstruments_ta10_mixers,
1790                                 ARRAY_SIZE(snd_nativeinstruments_ta10_mixers));
1791                 break;
1792 
1793         case USB_ID(0x200c, 0x1018): /* Electrix Ebox-44 */
1794                 /* detection is disabled in mixer_maps.c */
1795                 err = snd_create_std_mono_table(mixer, ebox44_table);
1796                 break;
1797 
1798         case USB_ID(0x1235, 0x8012): /* Focusrite Scarlett 6i6 */
1799         case USB_ID(0x1235, 0x8002): /* Focusrite Scarlett 8i6 */
1800         case USB_ID(0x1235, 0x8004): /* Focusrite Scarlett 18i6 */
1801         case USB_ID(0x1235, 0x8014): /* Focusrite Scarlett 18i8 */
1802         case USB_ID(0x1235, 0x800c): /* Focusrite Scarlett 18i20 */
1803                 err = snd_scarlett_controls_create(mixer);
1804                 break;
1805         }
1806 
1807         return err;
1808 }
1809 
1810 void snd_usb_mixer_rc_memory_change(struct usb_mixer_interface *mixer,
1811                                     int unitid)
1812 {
1813         if (!mixer->rc_cfg)
1814                 return;
1815         /* unit ids specific to Extigy/Audigy 2 NX: */
1816         switch (unitid) {
1817         case 0: /* remote control */
1818                 mixer->rc_urb->dev = mixer->chip->dev;
1819                 usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
1820                 break;
1821         case 4: /* digital in jack */
1822         case 7: /* line in jacks */
1823         case 19: /* speaker out jacks */
1824         case 20: /* headphones out jack */
1825                 break;
1826         /* live24ext: 4 = line-in jack */
1827         case 3: /* hp-out jack (may actuate Mute) */
1828                 if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
1829                     mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
1830                         snd_usb_mixer_notify_id(mixer, mixer->rc_cfg->mute_mixer_id);
1831                 break;
1832         default:
1833                 usb_audio_dbg(mixer->chip, "memory change in unknown unit %d\n", unitid);
1834                 break;
1835         }
1836 }
1837 
1838 static void snd_dragonfly_quirk_db_scale(struct usb_mixer_interface *mixer,
1839                                          struct usb_mixer_elem_info *cval,
1840                                          struct snd_kcontrol *kctl)
1841 {
1842         /* Approximation using 10 ranges based on output measurement on hw v1.2.
1843          * This seems close to the cubic mapping e.g. alsamixer uses. */
1844         static const DECLARE_TLV_DB_RANGE(scale,
1845                  0,  1, TLV_DB_MINMAX_ITEM(-5300, -4970),
1846                  2,  5, TLV_DB_MINMAX_ITEM(-4710, -4160),
1847                  6,  7, TLV_DB_MINMAX_ITEM(-3884, -3710),
1848                  8, 14, TLV_DB_MINMAX_ITEM(-3443, -2560),
1849                 15, 16, TLV_DB_MINMAX_ITEM(-2475, -2324),
1850                 17, 19, TLV_DB_MINMAX_ITEM(-2228, -2031),
1851                 20, 26, TLV_DB_MINMAX_ITEM(-1910, -1393),
1852                 27, 31, TLV_DB_MINMAX_ITEM(-1322, -1032),
1853                 32, 40, TLV_DB_MINMAX_ITEM(-968, -490),
1854                 41, 50, TLV_DB_MINMAX_ITEM(-441, 0),
1855         );
1856 
1857         if (cval->min == 0 && cval->max == 50) {
1858                 usb_audio_info(mixer->chip, "applying DragonFly dB scale quirk (0-50 variant)\n");
1859                 kctl->tlv.p = scale;
1860                 kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
1861                 kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1862 
1863         } else if (cval->min == 0 && cval->max <= 1000) {
1864                 /* Some other clearly broken DragonFly variant.
1865                  * At least a 0..53 variant (hw v1.0) exists.
1866                  */
1867                 usb_audio_info(mixer->chip, "ignoring too narrow dB range on a DragonFly device");
1868                 kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1869         }
1870 }
1871 
1872 void snd_usb_mixer_fu_apply_quirk(struct usb_mixer_interface *mixer,
1873                                   struct usb_mixer_elem_info *cval, int unitid,
1874                                   struct snd_kcontrol *kctl)
1875 {
1876         switch (mixer->chip->usb_id) {
1877         case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */
1878                 if (unitid == 7 && cval->control == UAC_FU_VOLUME)
1879                         snd_dragonfly_quirk_db_scale(mixer, cval, kctl);
1880                 break;
1881         }
1882 }
1883 
1884 

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