2 * (Tentative) USB Audio Driver for ALSA
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include <linux/bitops.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/slab.h>
33 #include <linux/string.h>
34 #include <linux/usb.h>
35 #include <linux/usb/audio.h>
36 #include <linux/usb/audio-v2.h>
38 #include <sound/core.h>
39 #include <sound/control.h>
40 #include <sound/hwdep.h>
41 #include <sound/info.h>
42 #include <sound/tlv.h>
47 #include "mixer_quirks.h"
49 #define MAX_ID_ELEMS 256
51 struct usb_audio_term
{
55 unsigned int chconfig
;
59 struct usbmix_name_map
;
62 struct snd_usb_audio
*chip
;
63 struct usb_mixer_interface
*mixer
;
64 unsigned char *buffer
;
66 DECLARE_BITMAP(unitbitmap
, MAX_ID_ELEMS
);
67 struct usb_audio_term oterm
;
68 const struct usbmix_name_map
*map
;
69 const struct usbmix_selector_map
*selector_map
;
74 USB_MIXER_INV_BOOLEAN
,
82 /*E-mu 0202(0404) eXtension Unit(XU) control*/
84 USB_XU_CLOCK_RATE
= 0xe301,
85 USB_XU_CLOCK_SOURCE
= 0xe302,
86 USB_XU_DIGITAL_IO_STATUS
= 0xe303,
87 USB_XU_DEVICE_OPTIONS
= 0xe304,
88 USB_XU_DIRECT_MONITORING
= 0xe305,
89 USB_XU_METERING
= 0xe306
92 USB_XU_CLOCK_SOURCE_SELECTOR
= 0x02, /* clock source*/
93 USB_XU_CLOCK_RATE_SELECTOR
= 0x03, /* clock rate */
94 USB_XU_DIGITAL_FORMAT_SELECTOR
= 0x01, /* the spdif format */
95 USB_XU_SOFT_LIMIT_SELECTOR
= 0x03 /* soft limiter */
99 * manual mapping of mixer names
100 * if the mixer topology is too complicated and the parsed names are
101 * ambiguous, add the entries in usbmixer_maps.c.
103 #include "mixer_maps.c"
105 static const struct usbmix_name_map
*
106 find_map(struct mixer_build
*state
, int unitid
, int control
)
108 const struct usbmix_name_map
*p
= state
->map
;
113 for (p
= state
->map
; p
->id
; p
++) {
114 if (p
->id
== unitid
&&
115 (!control
|| !p
->control
|| control
== p
->control
))
121 /* get the mapped name if the unit matches */
123 check_mapped_name(const struct usbmix_name_map
*p
, char *buf
, int buflen
)
129 return strlcpy(buf
, p
->name
, buflen
);
132 /* check whether the control should be ignored */
134 check_ignored_ctl(const struct usbmix_name_map
*p
)
136 if (!p
|| p
->name
|| p
->dB
)
142 static inline void check_mapped_dB(const struct usbmix_name_map
*p
,
143 struct usb_mixer_elem_info
*cval
)
146 cval
->dBmin
= p
->dB
->min
;
147 cval
->dBmax
= p
->dB
->max
;
151 /* get the mapped selector source name */
152 static int check_mapped_selector_name(struct mixer_build
*state
, int unitid
,
153 int index
, char *buf
, int buflen
)
155 const struct usbmix_selector_map
*p
;
157 if (! state
->selector_map
)
159 for (p
= state
->selector_map
; p
->id
; p
++) {
160 if (p
->id
== unitid
&& index
< p
->count
)
161 return strlcpy(buf
, p
->names
[index
], buflen
);
167 * find an audio control unit with the given unit id
169 static void *find_audio_control_unit(struct mixer_build
*state
, unsigned char unit
)
171 /* we just parse the header */
172 struct uac_feature_unit_descriptor
*hdr
= NULL
;
174 while ((hdr
= snd_usb_find_desc(state
->buffer
, state
->buflen
, hdr
,
175 USB_DT_CS_INTERFACE
)) != NULL
) {
176 if (hdr
->bLength
>= 4 &&
177 hdr
->bDescriptorSubtype
>= UAC_INPUT_TERMINAL
&&
178 hdr
->bDescriptorSubtype
<= UAC2_SAMPLE_RATE_CONVERTER
&&
179 hdr
->bUnitID
== unit
)
187 * copy a string with the given id
189 static int snd_usb_copy_string_desc(struct mixer_build
*state
, int index
, char *buf
, int maxlen
)
191 int len
= usb_string(state
->chip
->dev
, index
, buf
, maxlen
- 1);
197 * convert from the byte/word on usb descriptor to the zero-based integer
199 static int convert_signed_value(struct usb_mixer_elem_info
*cval
, int val
)
201 switch (cval
->val_type
) {
202 case USB_MIXER_BOOLEAN
:
204 case USB_MIXER_INV_BOOLEAN
:
227 * convert from the zero-based int to the byte/word for usb descriptor
229 static int convert_bytes_value(struct usb_mixer_elem_info
*cval
, int val
)
231 switch (cval
->val_type
) {
232 case USB_MIXER_BOOLEAN
:
234 case USB_MIXER_INV_BOOLEAN
:
243 return 0; /* not reached */
246 static int get_relative_value(struct usb_mixer_elem_info
*cval
, int val
)
252 else if (val
>= cval
->max
)
253 return (cval
->max
- cval
->min
+ cval
->res
- 1) / cval
->res
;
255 return (val
- cval
->min
) / cval
->res
;
258 static int get_abs_value(struct usb_mixer_elem_info
*cval
, int val
)
273 * retrieve a mixer value
276 static int get_ctl_value_v1(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
278 unsigned char buf
[2];
279 int val_len
= cval
->val_type
>= USB_MIXER_S16
? 2 : 1;
282 while (timeout
-- > 0) {
283 if (snd_usb_ctl_msg(cval
->mixer
->chip
->dev
,
284 usb_rcvctrlpipe(cval
->mixer
->chip
->dev
, 0),
286 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_IN
,
287 validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8),
288 buf
, val_len
, 100) >= val_len
) {
289 *value_ret
= convert_signed_value(cval
, snd_usb_combine_bytes(buf
, val_len
));
293 snd_printdd(KERN_ERR
"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
294 request
, validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8), cval
->val_type
);
298 static int get_ctl_value_v2(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
300 unsigned char buf
[14]; /* enough space for one range of 4 bytes */
305 bRequest
= (request
== UAC_GET_CUR
) ?
306 UAC2_CS_CUR
: UAC2_CS_RANGE
;
308 ret
= snd_usb_ctl_msg(cval
->mixer
->chip
->dev
,
309 usb_rcvctrlpipe(cval
->mixer
->chip
->dev
, 0),
311 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_IN
,
312 validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8),
313 buf
, sizeof(buf
), 1000);
316 snd_printk(KERN_ERR
"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
317 request
, validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8), cval
->val_type
);
326 val
= buf
+ sizeof(__u16
);
329 val
= buf
+ sizeof(__u16
) * 2;
332 val
= buf
+ sizeof(__u16
) * 3;
338 *value_ret
= convert_signed_value(cval
, snd_usb_combine_bytes(val
, sizeof(__u16
)));
343 static int get_ctl_value(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
345 return (cval
->mixer
->protocol
== UAC_VERSION_1
) ?
346 get_ctl_value_v1(cval
, request
, validx
, value_ret
) :
347 get_ctl_value_v2(cval
, request
, validx
, value_ret
);
350 static int get_cur_ctl_value(struct usb_mixer_elem_info
*cval
, int validx
, int *value
)
352 return get_ctl_value(cval
, UAC_GET_CUR
, validx
, value
);
355 /* channel = 0: master, 1 = first channel */
356 static inline int get_cur_mix_raw(struct usb_mixer_elem_info
*cval
,
357 int channel
, int *value
)
359 return get_ctl_value(cval
, UAC_GET_CUR
, (cval
->control
<< 8) | channel
, value
);
362 static int get_cur_mix_value(struct usb_mixer_elem_info
*cval
,
363 int channel
, int index
, int *value
)
367 if (cval
->cached
& (1 << channel
)) {
368 *value
= cval
->cache_val
[index
];
371 err
= get_cur_mix_raw(cval
, channel
, value
);
373 if (!cval
->mixer
->ignore_ctl_error
)
374 snd_printd(KERN_ERR
"cannot get current value for control %d ch %d: err = %d\n",
375 cval
->control
, channel
, err
);
378 cval
->cached
|= 1 << channel
;
379 cval
->cache_val
[index
] = *value
;
388 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info
*cval
,
389 int request
, int validx
, int value_set
)
391 unsigned char buf
[2];
392 int val_len
, timeout
= 10;
394 if (cval
->mixer
->protocol
== UAC_VERSION_1
) {
395 val_len
= cval
->val_type
>= USB_MIXER_S16
? 2 : 1;
396 } else { /* UAC_VERSION_2 */
397 /* audio class v2 controls are always 2 bytes in size */
398 val_len
= sizeof(__u16
);
401 if (request
!= UAC_SET_CUR
) {
402 snd_printdd(KERN_WARNING
"RANGE setting not yet supported\n");
406 request
= UAC2_CS_CUR
;
409 value_set
= convert_bytes_value(cval
, value_set
);
410 buf
[0] = value_set
& 0xff;
411 buf
[1] = (value_set
>> 8) & 0xff;
412 while (timeout
-- > 0)
413 if (snd_usb_ctl_msg(cval
->mixer
->chip
->dev
,
414 usb_sndctrlpipe(cval
->mixer
->chip
->dev
, 0),
416 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_OUT
,
417 validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8),
418 buf
, val_len
, 100) >= 0)
420 snd_printdd(KERN_ERR
"cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
421 request
, validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8), cval
->val_type
, buf
[0], buf
[1]);
425 static int set_cur_ctl_value(struct usb_mixer_elem_info
*cval
, int validx
, int value
)
427 return snd_usb_mixer_set_ctl_value(cval
, UAC_SET_CUR
, validx
, value
);
430 static int set_cur_mix_value(struct usb_mixer_elem_info
*cval
, int channel
,
431 int index
, int value
)
434 unsigned int read_only
= (channel
== 0) ?
435 cval
->master_readonly
:
436 cval
->ch_readonly
& (1 << (channel
- 1));
439 snd_printdd(KERN_INFO
"%s(): channel %d of control %d is read_only\n",
440 __func__
, channel
, cval
->control
);
444 err
= snd_usb_mixer_set_ctl_value(cval
, UAC_SET_CUR
, (cval
->control
<< 8) | channel
,
448 cval
->cached
|= 1 << channel
;
449 cval
->cache_val
[index
] = value
;
454 * TLV callback for mixer volume controls
456 static int mixer_vol_tlv(struct snd_kcontrol
*kcontrol
, int op_flag
,
457 unsigned int size
, unsigned int __user
*_tlv
)
459 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
460 DECLARE_TLV_DB_MINMAX(scale
, 0, 0);
462 if (size
< sizeof(scale
))
464 scale
[2] = cval
->dBmin
;
465 scale
[3] = cval
->dBmax
;
466 if (copy_to_user(_tlv
, scale
, sizeof(scale
)))
472 * parser routines begin here...
475 static int parse_audio_unit(struct mixer_build
*state
, int unitid
);
479 * check if the input/output channel routing is enabled on the given bitmap.
480 * used for mixer unit parser
482 static int check_matrix_bitmap(unsigned char *bmap
, int ich
, int och
, int num_outs
)
484 int idx
= ich
* num_outs
+ och
;
485 return bmap
[idx
>> 3] & (0x80 >> (idx
& 7));
490 * add an alsa control element
491 * search and increment the index until an empty slot is found.
493 * if failed, give up and free the control instance.
496 static int add_control_to_empty(struct mixer_build
*state
, struct snd_kcontrol
*kctl
)
498 struct usb_mixer_elem_info
*cval
= kctl
->private_data
;
501 while (snd_ctl_find_id(state
->chip
->card
, &kctl
->id
))
503 if ((err
= snd_ctl_add(state
->chip
->card
, kctl
)) < 0) {
504 snd_printd(KERN_ERR
"cannot add control (err = %d)\n", err
);
507 cval
->elem_id
= &kctl
->id
;
508 cval
->next_id_elem
= state
->mixer
->id_elems
[cval
->id
];
509 state
->mixer
->id_elems
[cval
->id
] = cval
;
515 * get a terminal name string
518 static struct iterm_name_combo
{
522 { 0x0300, "Output" },
523 { 0x0301, "Speaker" },
524 { 0x0302, "Headphone" },
525 { 0x0303, "HMD Audio" },
526 { 0x0304, "Desktop Speaker" },
527 { 0x0305, "Room Speaker" },
528 { 0x0306, "Com Speaker" },
530 { 0x0600, "External In" },
531 { 0x0601, "Analog In" },
532 { 0x0602, "Digital In" },
534 { 0x0604, "Legacy In" },
535 { 0x0605, "IEC958 In" },
536 { 0x0606, "1394 DA Stream" },
537 { 0x0607, "1394 DV Stream" },
538 { 0x0700, "Embedded" },
539 { 0x0701, "Noise Source" },
540 { 0x0702, "Equalization Noise" },
544 { 0x0706, "MiniDisk" },
545 { 0x0707, "Analog Tape" },
546 { 0x0708, "Phonograph" },
547 { 0x0709, "VCR Audio" },
548 { 0x070a, "Video Disk Audio" },
549 { 0x070b, "DVD Audio" },
550 { 0x070c, "TV Tuner Audio" },
551 { 0x070d, "Satellite Rec Audio" },
552 { 0x070e, "Cable Tuner Audio" },
553 { 0x070f, "DSS Audio" },
554 { 0x0710, "Radio Receiver" },
555 { 0x0711, "Radio Transmitter" },
556 { 0x0712, "Multi-Track Recorder" },
557 { 0x0713, "Synthesizer" },
561 static int get_term_name(struct mixer_build
*state
, struct usb_audio_term
*iterm
,
562 unsigned char *name
, int maxlen
, int term_only
)
564 struct iterm_name_combo
*names
;
567 return snd_usb_copy_string_desc(state
, iterm
->name
, name
, maxlen
);
569 /* virtual type - not a real terminal */
570 if (iterm
->type
>> 16) {
573 switch (iterm
->type
>> 16) {
574 case UAC_SELECTOR_UNIT
:
575 strcpy(name
, "Selector"); return 8;
576 case UAC_PROCESSING_UNIT_V1
:
577 strcpy(name
, "Process Unit"); return 12;
578 case UAC_EXTENSION_UNIT_V1
:
579 strcpy(name
, "Ext Unit"); return 8;
581 strcpy(name
, "Mixer"); return 5;
583 return sprintf(name
, "Unit %d", iterm
->id
);
587 switch (iterm
->type
& 0xff00) {
589 strcpy(name
, "PCM"); return 3;
591 strcpy(name
, "Mic"); return 3;
593 strcpy(name
, "Headset"); return 7;
595 strcpy(name
, "Phone"); return 5;
598 for (names
= iterm_names
; names
->type
; names
++)
599 if (names
->type
== iterm
->type
) {
600 strcpy(name
, names
->name
);
601 return strlen(names
->name
);
608 * parse the source unit recursively until it reaches to a terminal
609 * or a branched unit.
611 static int check_input_term(struct mixer_build
*state
, int id
, struct usb_audio_term
*term
)
616 memset(term
, 0, sizeof(*term
));
617 while ((p1
= find_audio_control_unit(state
, id
)) != NULL
) {
618 unsigned char *hdr
= p1
;
621 case UAC_INPUT_TERMINAL
:
622 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
623 struct uac_input_terminal_descriptor
*d
= p1
;
624 term
->type
= le16_to_cpu(d
->wTerminalType
);
625 term
->channels
= d
->bNrChannels
;
626 term
->chconfig
= le16_to_cpu(d
->wChannelConfig
);
627 term
->name
= d
->iTerminal
;
628 } else { /* UAC_VERSION_2 */
629 struct uac2_input_terminal_descriptor
*d
= p1
;
630 term
->type
= le16_to_cpu(d
->wTerminalType
);
631 term
->channels
= d
->bNrChannels
;
632 term
->chconfig
= le32_to_cpu(d
->bmChannelConfig
);
633 term
->name
= d
->iTerminal
;
635 /* call recursively to get the clock selectors */
636 err
= check_input_term(state
, d
->bCSourceID
, term
);
641 case UAC_FEATURE_UNIT
: {
642 /* the header is the same for v1 and v2 */
643 struct uac_feature_unit_descriptor
*d
= p1
;
645 break; /* continue to parse */
647 case UAC_MIXER_UNIT
: {
648 struct uac_mixer_unit_descriptor
*d
= p1
;
649 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
650 term
->channels
= uac_mixer_unit_bNrChannels(d
);
651 term
->chconfig
= uac_mixer_unit_wChannelConfig(d
, state
->mixer
->protocol
);
652 term
->name
= uac_mixer_unit_iMixer(d
);
655 case UAC_SELECTOR_UNIT
:
656 case UAC2_CLOCK_SELECTOR
: {
657 struct uac_selector_unit_descriptor
*d
= p1
;
658 /* call recursively to retrieve the channel info */
659 if (check_input_term(state
, d
->baSourceID
[0], term
) < 0)
661 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
663 term
->name
= uac_selector_unit_iSelector(d
);
666 case UAC_PROCESSING_UNIT_V1
:
667 case UAC_EXTENSION_UNIT_V1
: {
668 struct uac_processing_unit_descriptor
*d
= p1
;
670 id
= d
->baSourceID
[0];
671 break; /* continue to parse */
673 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
674 term
->channels
= uac_processing_unit_bNrChannels(d
);
675 term
->chconfig
= uac_processing_unit_wChannelConfig(d
, state
->mixer
->protocol
);
676 term
->name
= uac_processing_unit_iProcessing(d
, state
->mixer
->protocol
);
679 case UAC2_CLOCK_SOURCE
: {
680 struct uac_clock_source_descriptor
*d
= p1
;
681 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
683 term
->name
= d
->iClockSource
;
698 /* feature unit control information */
699 struct usb_feature_control_info
{
701 unsigned int type
; /* control type (mute, volume, etc.) */
704 static struct usb_feature_control_info audio_feature_info
[] = {
705 { "Mute", USB_MIXER_INV_BOOLEAN
},
706 { "Volume", USB_MIXER_S16
},
707 { "Tone Control - Bass", USB_MIXER_S8
},
708 { "Tone Control - Mid", USB_MIXER_S8
},
709 { "Tone Control - Treble", USB_MIXER_S8
},
710 { "Graphic Equalizer", USB_MIXER_S8
}, /* FIXME: not implemeted yet */
711 { "Auto Gain Control", USB_MIXER_BOOLEAN
},
712 { "Delay Control", USB_MIXER_U16
},
713 { "Bass Boost", USB_MIXER_BOOLEAN
},
714 { "Loudness", USB_MIXER_BOOLEAN
},
716 { "Input Gain Control", USB_MIXER_U16
},
717 { "Input Gain Pad Control", USB_MIXER_BOOLEAN
},
718 { "Phase Inverter Control", USB_MIXER_BOOLEAN
},
722 /* private_free callback */
723 static void usb_mixer_elem_free(struct snd_kcontrol
*kctl
)
725 kfree(kctl
->private_data
);
726 kctl
->private_data
= NULL
;
731 * interface to ALSA control for feature/mixer units
735 * retrieve the minimum and maximum values for the specified control
737 static int get_min_max(struct usb_mixer_elem_info
*cval
, int default_min
)
740 cval
->min
= default_min
;
741 cval
->max
= cval
->min
+ 1;
743 cval
->dBmin
= cval
->dBmax
= 0;
745 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
746 cval
->val_type
== USB_MIXER_INV_BOOLEAN
) {
747 cval
->initialized
= 1;
752 for (i
= 0; i
< MAX_CHANNELS
; i
++)
753 if (cval
->cmask
& (1 << i
)) {
758 if (get_ctl_value(cval
, UAC_GET_MAX
, (cval
->control
<< 8) | minchn
, &cval
->max
) < 0 ||
759 get_ctl_value(cval
, UAC_GET_MIN
, (cval
->control
<< 8) | minchn
, &cval
->min
) < 0) {
760 snd_printd(KERN_ERR
"%d:%d: cannot get min/max values for control %d (id %d)\n",
761 cval
->id
, cval
->mixer
->ctrlif
, cval
->control
, cval
->id
);
764 if (get_ctl_value(cval
, UAC_GET_RES
, (cval
->control
<< 8) | minchn
, &cval
->res
) < 0) {
767 int last_valid_res
= cval
->res
;
769 while (cval
->res
> 1) {
770 if (snd_usb_mixer_set_ctl_value(cval
, UAC_SET_RES
,
771 (cval
->control
<< 8) | minchn
, cval
->res
/ 2) < 0)
775 if (get_ctl_value(cval
, UAC_GET_RES
, (cval
->control
<< 8) | minchn
, &cval
->res
) < 0)
776 cval
->res
= last_valid_res
;
781 /* Additional checks for the proper resolution
783 * Some devices report smaller resolutions than actually
784 * reacting. They don't return errors but simply clip
785 * to the lower aligned value.
787 if (cval
->min
+ cval
->res
< cval
->max
) {
788 int last_valid_res
= cval
->res
;
789 int saved
, test
, check
;
790 get_cur_mix_raw(cval
, minchn
, &saved
);
793 if (test
< cval
->max
)
797 if (test
< cval
->min
|| test
> cval
->max
||
798 set_cur_mix_value(cval
, minchn
, 0, test
) ||
799 get_cur_mix_raw(cval
, minchn
, &check
)) {
800 cval
->res
= last_valid_res
;
807 set_cur_mix_value(cval
, minchn
, 0, saved
);
810 cval
->initialized
= 1;
813 /* USB descriptions contain the dB scale in 1/256 dB unit
814 * while ALSA TLV contains in 1/100 dB unit
816 cval
->dBmin
= (convert_signed_value(cval
, cval
->min
) * 100) / 256;
817 cval
->dBmax
= (convert_signed_value(cval
, cval
->max
) * 100) / 256;
818 if (cval
->dBmin
> cval
->dBmax
) {
819 /* something is wrong; assume it's either from/to 0dB */
822 else if (cval
->dBmin
> 0)
824 if (cval
->dBmin
> cval
->dBmax
) {
825 /* totally crap, return an error */
834 /* get a feature/mixer unit info */
835 static int mixer_ctl_feature_info(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_info
*uinfo
)
837 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
839 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
840 cval
->val_type
== USB_MIXER_INV_BOOLEAN
)
841 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
843 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
844 uinfo
->count
= cval
->channels
;
845 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
846 cval
->val_type
== USB_MIXER_INV_BOOLEAN
) {
847 uinfo
->value
.integer
.min
= 0;
848 uinfo
->value
.integer
.max
= 1;
850 if (! cval
->initialized
)
851 get_min_max(cval
, 0);
852 uinfo
->value
.integer
.min
= 0;
853 uinfo
->value
.integer
.max
=
854 (cval
->max
- cval
->min
+ cval
->res
- 1) / cval
->res
;
859 /* get the current value from feature/mixer unit */
860 static int mixer_ctl_feature_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
862 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
863 int c
, cnt
, val
, err
;
865 ucontrol
->value
.integer
.value
[0] = cval
->min
;
868 for (c
= 0; c
< MAX_CHANNELS
; c
++) {
869 if (!(cval
->cmask
& (1 << c
)))
871 err
= get_cur_mix_value(cval
, c
+ 1, cnt
, &val
);
873 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
874 val
= get_relative_value(cval
, val
);
875 ucontrol
->value
.integer
.value
[cnt
] = val
;
881 err
= get_cur_mix_value(cval
, 0, 0, &val
);
883 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
884 val
= get_relative_value(cval
, val
);
885 ucontrol
->value
.integer
.value
[0] = val
;
890 /* put the current value to feature/mixer unit */
891 static int mixer_ctl_feature_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
893 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
894 int c
, cnt
, val
, oval
, err
;
899 for (c
= 0; c
< MAX_CHANNELS
; c
++) {
900 if (!(cval
->cmask
& (1 << c
)))
902 err
= get_cur_mix_value(cval
, c
+ 1, cnt
, &oval
);
904 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
905 val
= ucontrol
->value
.integer
.value
[cnt
];
906 val
= get_abs_value(cval
, val
);
908 set_cur_mix_value(cval
, c
+ 1, cnt
, val
);
915 err
= get_cur_mix_value(cval
, 0, 0, &oval
);
917 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
918 val
= ucontrol
->value
.integer
.value
[0];
919 val
= get_abs_value(cval
, val
);
921 set_cur_mix_value(cval
, 0, 0, val
);
928 static struct snd_kcontrol_new usb_feature_unit_ctl
= {
929 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
930 .name
= "", /* will be filled later manually */
931 .info
= mixer_ctl_feature_info
,
932 .get
= mixer_ctl_feature_get
,
933 .put
= mixer_ctl_feature_put
,
936 /* the read-only variant */
937 static struct snd_kcontrol_new usb_feature_unit_ctl_ro
= {
938 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
939 .name
= "", /* will be filled later manually */
940 .info
= mixer_ctl_feature_info
,
941 .get
= mixer_ctl_feature_get
,
947 * build a feature control
950 static size_t append_ctl_name(struct snd_kcontrol
*kctl
, const char *str
)
952 return strlcat(kctl
->id
.name
, str
, sizeof(kctl
->id
.name
));
955 static void build_feature_ctl(struct mixer_build
*state
, void *raw_desc
,
956 unsigned int ctl_mask
, int control
,
957 struct usb_audio_term
*iterm
, int unitid
,
960 struct uac_feature_unit_descriptor
*desc
= raw_desc
;
961 unsigned int len
= 0;
963 int nameid
= uac_feature_unit_iFeature(desc
);
964 struct snd_kcontrol
*kctl
;
965 struct usb_mixer_elem_info
*cval
;
966 const struct usbmix_name_map
*map
;
968 control
++; /* change from zero-based to 1-based value */
970 if (control
== UAC_FU_GRAPHIC_EQUALIZER
) {
971 /* FIXME: not supported yet */
975 map
= find_map(state
, unitid
, control
);
976 if (check_ignored_ctl(map
))
979 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
981 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
984 cval
->mixer
= state
->mixer
;
986 cval
->control
= control
;
987 cval
->cmask
= ctl_mask
;
988 cval
->val_type
= audio_feature_info
[control
-1].type
;
990 cval
->channels
= 1; /* master channel */
991 cval
->master_readonly
= readonly_mask
;
994 for (i
= 0; i
< 16; i
++)
995 if (ctl_mask
& (1 << i
))
998 cval
->ch_readonly
= readonly_mask
;
1001 /* get min/max values */
1002 get_min_max(cval
, 0);
1004 /* if all channels in the mask are marked read-only, make the control
1005 * read-only. set_cur_mix_value() will check the mask again and won't
1006 * issue write commands to read-only channels. */
1007 if (cval
->channels
== readonly_mask
)
1008 kctl
= snd_ctl_new1(&usb_feature_unit_ctl_ro
, cval
);
1010 kctl
= snd_ctl_new1(&usb_feature_unit_ctl
, cval
);
1013 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1017 kctl
->private_free
= usb_mixer_elem_free
;
1019 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1020 mapped_name
= len
!= 0;
1021 if (! len
&& nameid
)
1022 len
= snd_usb_copy_string_desc(state
, nameid
,
1023 kctl
->id
.name
, sizeof(kctl
->id
.name
));
1028 /* determine the control name. the rule is:
1029 * - if a name id is given in descriptor, use it.
1030 * - if the connected input can be determined, then use the name
1032 * - if the connected output can be determined, use it.
1033 * - otherwise, anonymous name.
1036 len
= get_term_name(state
, iterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 1);
1038 len
= get_term_name(state
, &state
->oterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 1);
1040 len
= snprintf(kctl
->id
.name
, sizeof(kctl
->id
.name
),
1041 "Feature %d", unitid
);
1043 /* determine the stream direction:
1044 * if the connected output is USB stream, then it's likely a
1045 * capture stream. otherwise it should be playback (hopefully :)
1047 if (! mapped_name
&& ! (state
->oterm
.type
>> 16)) {
1048 if ((state
->oterm
.type
& 0xff00) == 0x0100) {
1049 len
= append_ctl_name(kctl
, " Capture");
1051 len
= append_ctl_name(kctl
, " Playback");
1054 append_ctl_name(kctl
, control
== UAC_FU_MUTE
?
1055 " Switch" : " Volume");
1056 if (control
== UAC_FU_VOLUME
) {
1057 kctl
->tlv
.c
= mixer_vol_tlv
;
1058 kctl
->vd
[0].access
|=
1059 SNDRV_CTL_ELEM_ACCESS_TLV_READ
|
1060 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK
;
1061 check_mapped_dB(map
, cval
);
1067 strlcpy(kctl
->id
.name
, audio_feature_info
[control
-1].name
,
1068 sizeof(kctl
->id
.name
));
1072 /* volume control quirks */
1073 switch (state
->chip
->usb_id
) {
1074 case USB_ID(0x0471, 0x0101):
1075 case USB_ID(0x0471, 0x0104):
1076 case USB_ID(0x0471, 0x0105):
1077 case USB_ID(0x0672, 0x1041):
1078 /* quirk for UDA1321/N101.
1079 * note that detection between firmware 2.1.1.7 (N101)
1080 * and later 2.1.1.21 is not very clear from datasheets.
1081 * I hope that the min value is -15360 for newer firmware --jk
1083 if (!strcmp(kctl
->id
.name
, "PCM Playback Volume") &&
1084 cval
->min
== -15616) {
1085 snd_printk(KERN_INFO
1086 "set volume quirk for UDA1321/N101 chip\n");
1091 case USB_ID(0x046d, 0x09a4):
1092 if (!strcmp(kctl
->id
.name
, "Mic Capture Volume")) {
1093 snd_printk(KERN_INFO
1094 "set volume quirk for QuickCam E3500\n");
1103 snd_printdd(KERN_INFO
"[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1104 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
, cval
->res
);
1105 add_control_to_empty(state
, kctl
);
1111 * parse a feature unit
1113 * most of controlls are defined here.
1115 static int parse_audio_feature_unit(struct mixer_build
*state
, int unitid
, void *_ftr
)
1118 struct usb_audio_term iterm
;
1119 unsigned int master_bits
, first_ch_bits
;
1121 struct uac_feature_unit_descriptor
*hdr
= _ftr
;
1124 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
1125 csize
= hdr
->bControlSize
;
1126 channels
= (hdr
->bLength
- 7) / csize
- 1;
1127 bmaControls
= hdr
->bmaControls
;
1129 struct uac2_feature_unit_descriptor
*ftr
= _ftr
;
1131 channels
= (hdr
->bLength
- 6) / 4 - 1;
1132 bmaControls
= ftr
->bmaControls
;
1135 if (hdr
->bLength
< 7 || !csize
|| hdr
->bLength
< 7 + csize
) {
1136 snd_printk(KERN_ERR
"usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid
);
1140 /* parse the source unit */
1141 if ((err
= parse_audio_unit(state
, hdr
->bSourceID
)) < 0)
1144 /* determine the input source type and name */
1145 if (check_input_term(state
, hdr
->bSourceID
, &iterm
) < 0)
1148 master_bits
= snd_usb_combine_bytes(bmaControls
, csize
);
1149 /* master configuration quirks */
1150 switch (state
->chip
->usb_id
) {
1151 case USB_ID(0x08bb, 0x2702):
1152 snd_printk(KERN_INFO
1153 "usbmixer: master volume quirk for PCM2702 chip\n");
1154 /* disable non-functional volume control */
1155 master_bits
&= ~UAC_CONTROL_BIT(UAC_FU_VOLUME
);
1159 first_ch_bits
= snd_usb_combine_bytes(bmaControls
+ csize
, csize
);
1163 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
1164 /* check all control types */
1165 for (i
= 0; i
< 10; i
++) {
1166 unsigned int ch_bits
= 0;
1167 for (j
= 0; j
< channels
; j
++) {
1168 unsigned int mask
= snd_usb_combine_bytes(bmaControls
+ csize
* (j
+1), csize
);
1169 if (mask
& (1 << i
))
1170 ch_bits
|= (1 << j
);
1172 /* audio class v1 controls are never read-only */
1173 if (ch_bits
& 1) /* the first channel must be set (for ease of programming) */
1174 build_feature_ctl(state
, _ftr
, ch_bits
, i
, &iterm
, unitid
, 0);
1175 if (master_bits
& (1 << i
))
1176 build_feature_ctl(state
, _ftr
, 0, i
, &iterm
, unitid
, 0);
1178 } else { /* UAC_VERSION_2 */
1179 for (i
= 0; i
< 30/2; i
++) {
1180 /* From the USB Audio spec v2.0:
1181 bmaControls() is a (ch+1)-element array of 4-byte bitmaps,
1182 each containing a set of bit pairs. If a Control is present,
1183 it must be Host readable. If a certain Control is not
1184 present then the bit pair must be set to 0b00.
1185 If a Control is present but read-only, the bit pair must be
1186 set to 0b01. If a Control is also Host programmable, the bit
1187 pair must be set to 0b11. The value 0b10 is not allowed. */
1188 unsigned int ch_bits
= 0;
1189 unsigned int ch_read_only
= 0;
1191 for (j
= 0; j
< channels
; j
++) {
1192 unsigned int mask
= snd_usb_combine_bytes(bmaControls
+ csize
* (j
+1), csize
);
1193 if (uac2_control_is_readable(mask
, i
)) {
1194 ch_bits
|= (1 << j
);
1195 if (!uac2_control_is_writeable(mask
, i
))
1196 ch_read_only
|= (1 << j
);
1200 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1201 * are marked read-only in the descriptors. Otherwise, the control will be
1202 * reported as writeable, but the driver will not actually issue a write
1203 * command for read-only channels */
1204 if (ch_bits
& 1) /* the first channel must be set (for ease of programming) */
1205 build_feature_ctl(state
, _ftr
, ch_bits
, i
, &iterm
, unitid
, ch_read_only
);
1206 if (uac2_control_is_readable(master_bits
, i
))
1207 build_feature_ctl(state
, _ftr
, 0, i
, &iterm
, unitid
,
1208 !uac2_control_is_writeable(master_bits
, i
));
1221 * build a mixer unit control
1223 * the callbacks are identical with feature unit.
1224 * input channel number (zero based) is given in control field instead.
1227 static void build_mixer_unit_ctl(struct mixer_build
*state
,
1228 struct uac_mixer_unit_descriptor
*desc
,
1229 int in_pin
, int in_ch
, int unitid
,
1230 struct usb_audio_term
*iterm
)
1232 struct usb_mixer_elem_info
*cval
;
1233 unsigned int num_outs
= uac_mixer_unit_bNrChannels(desc
);
1234 unsigned int i
, len
;
1235 struct snd_kcontrol
*kctl
;
1236 const struct usbmix_name_map
*map
;
1238 map
= find_map(state
, unitid
, 0);
1239 if (check_ignored_ctl(map
))
1242 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1246 cval
->mixer
= state
->mixer
;
1248 cval
->control
= in_ch
+ 1; /* based on 1 */
1249 cval
->val_type
= USB_MIXER_S16
;
1250 for (i
= 0; i
< num_outs
; i
++) {
1251 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc
, state
->mixer
->protocol
), in_ch
, i
, num_outs
)) {
1252 cval
->cmask
|= (1 << i
);
1257 /* get min/max values */
1258 get_min_max(cval
, 0);
1260 kctl
= snd_ctl_new1(&usb_feature_unit_ctl
, cval
);
1262 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1266 kctl
->private_free
= usb_mixer_elem_free
;
1268 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1270 len
= get_term_name(state
, iterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 0);
1272 len
= sprintf(kctl
->id
.name
, "Mixer Source %d", in_ch
+ 1);
1273 append_ctl_name(kctl
, " Volume");
1275 snd_printdd(KERN_INFO
"[%d] MU [%s] ch = %d, val = %d/%d\n",
1276 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
);
1277 add_control_to_empty(state
, kctl
);
1282 * parse a mixer unit
1284 static int parse_audio_mixer_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1286 struct uac_mixer_unit_descriptor
*desc
= raw_desc
;
1287 struct usb_audio_term iterm
;
1288 int input_pins
, num_ins
, num_outs
;
1291 if (desc
->bLength
< 11 || ! (input_pins
= desc
->bNrInPins
) || ! (num_outs
= uac_mixer_unit_bNrChannels(desc
))) {
1292 snd_printk(KERN_ERR
"invalid MIXER UNIT descriptor %d\n", unitid
);
1295 /* no bmControls field (e.g. Maya44) -> ignore */
1296 if (desc
->bLength
<= 10 + input_pins
) {
1297 snd_printdd(KERN_INFO
"MU %d has no bmControls field\n", unitid
);
1303 for (pin
= 0; pin
< input_pins
; pin
++) {
1304 err
= parse_audio_unit(state
, desc
->baSourceID
[pin
]);
1307 err
= check_input_term(state
, desc
->baSourceID
[pin
], &iterm
);
1310 num_ins
+= iterm
.channels
;
1311 for (; ich
< num_ins
; ++ich
) {
1312 int och
, ich_has_controls
= 0;
1314 for (och
= 0; och
< num_outs
; ++och
) {
1315 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc
, state
->mixer
->protocol
),
1316 ich
, och
, num_outs
)) {
1317 ich_has_controls
= 1;
1321 if (ich_has_controls
)
1322 build_mixer_unit_ctl(state
, desc
, pin
, ich
,
1331 * Processing Unit / Extension Unit
1334 /* get callback for processing/extension unit */
1335 static int mixer_ctl_procunit_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1337 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1340 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &val
);
1341 if (err
< 0 && cval
->mixer
->ignore_ctl_error
) {
1342 ucontrol
->value
.integer
.value
[0] = cval
->min
;
1347 val
= get_relative_value(cval
, val
);
1348 ucontrol
->value
.integer
.value
[0] = val
;
1352 /* put callback for processing/extension unit */
1353 static int mixer_ctl_procunit_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1355 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1358 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &oval
);
1360 if (cval
->mixer
->ignore_ctl_error
)
1364 val
= ucontrol
->value
.integer
.value
[0];
1365 val
= get_abs_value(cval
, val
);
1367 set_cur_ctl_value(cval
, cval
->control
<< 8, val
);
1373 /* alsa control interface for processing/extension unit */
1374 static struct snd_kcontrol_new mixer_procunit_ctl
= {
1375 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1376 .name
= "", /* will be filled later */
1377 .info
= mixer_ctl_feature_info
,
1378 .get
= mixer_ctl_procunit_get
,
1379 .put
= mixer_ctl_procunit_put
,
1384 * predefined data for processing units
1386 struct procunit_value_info
{
1393 struct procunit_info
{
1396 struct procunit_value_info
*values
;
1399 static struct procunit_value_info updown_proc_info
[] = {
1400 { UAC_UD_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1401 { UAC_UD_MODE_SELECT
, "Mode Select", USB_MIXER_U8
, 1 },
1404 static struct procunit_value_info prologic_proc_info
[] = {
1405 { UAC_DP_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1406 { UAC_DP_MODE_SELECT
, "Mode Select", USB_MIXER_U8
, 1 },
1409 static struct procunit_value_info threed_enh_proc_info
[] = {
1410 { UAC_3D_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1411 { UAC_3D_SPACE
, "Spaciousness", USB_MIXER_U8
},
1414 static struct procunit_value_info reverb_proc_info
[] = {
1415 { UAC_REVERB_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1416 { UAC_REVERB_LEVEL
, "Level", USB_MIXER_U8
},
1417 { UAC_REVERB_TIME
, "Time", USB_MIXER_U16
},
1418 { UAC_REVERB_FEEDBACK
, "Feedback", USB_MIXER_U8
},
1421 static struct procunit_value_info chorus_proc_info
[] = {
1422 { UAC_CHORUS_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1423 { UAC_CHORUS_LEVEL
, "Level", USB_MIXER_U8
},
1424 { UAC_CHORUS_RATE
, "Rate", USB_MIXER_U16
},
1425 { UAC_CHORUS_DEPTH
, "Depth", USB_MIXER_U16
},
1428 static struct procunit_value_info dcr_proc_info
[] = {
1429 { UAC_DCR_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1430 { UAC_DCR_RATE
, "Ratio", USB_MIXER_U16
},
1431 { UAC_DCR_MAXAMPL
, "Max Amp", USB_MIXER_S16
},
1432 { UAC_DCR_THRESHOLD
, "Threshold", USB_MIXER_S16
},
1433 { UAC_DCR_ATTACK_TIME
, "Attack Time", USB_MIXER_U16
},
1434 { UAC_DCR_RELEASE_TIME
, "Release Time", USB_MIXER_U16
},
1438 static struct procunit_info procunits
[] = {
1439 { UAC_PROCESS_UP_DOWNMIX
, "Up Down", updown_proc_info
},
1440 { UAC_PROCESS_DOLBY_PROLOGIC
, "Dolby Prologic", prologic_proc_info
},
1441 { UAC_PROCESS_STEREO_EXTENDER
, "3D Stereo Extender", threed_enh_proc_info
},
1442 { UAC_PROCESS_REVERB
, "Reverb", reverb_proc_info
},
1443 { UAC_PROCESS_CHORUS
, "Chorus", chorus_proc_info
},
1444 { UAC_PROCESS_DYN_RANGE_COMP
, "DCR", dcr_proc_info
},
1448 * predefined data for extension units
1450 static struct procunit_value_info clock_rate_xu_info
[] = {
1451 { USB_XU_CLOCK_RATE_SELECTOR
, "Selector", USB_MIXER_U8
, 0 },
1454 static struct procunit_value_info clock_source_xu_info
[] = {
1455 { USB_XU_CLOCK_SOURCE_SELECTOR
, "External", USB_MIXER_BOOLEAN
},
1458 static struct procunit_value_info spdif_format_xu_info
[] = {
1459 { USB_XU_DIGITAL_FORMAT_SELECTOR
, "SPDIF/AC3", USB_MIXER_BOOLEAN
},
1462 static struct procunit_value_info soft_limit_xu_info
[] = {
1463 { USB_XU_SOFT_LIMIT_SELECTOR
, " ", USB_MIXER_BOOLEAN
},
1466 static struct procunit_info extunits
[] = {
1467 { USB_XU_CLOCK_RATE
, "Clock rate", clock_rate_xu_info
},
1468 { USB_XU_CLOCK_SOURCE
, "DigitalIn CLK source", clock_source_xu_info
},
1469 { USB_XU_DIGITAL_IO_STATUS
, "DigitalOut format:", spdif_format_xu_info
},
1470 { USB_XU_DEVICE_OPTIONS
, "AnalogueIn Soft Limit", soft_limit_xu_info
},
1474 * build a processing/extension unit
1476 static int build_audio_procunit(struct mixer_build
*state
, int unitid
, void *raw_desc
, struct procunit_info
*list
, char *name
)
1478 struct uac_processing_unit_descriptor
*desc
= raw_desc
;
1479 int num_ins
= desc
->bNrInPins
;
1480 struct usb_mixer_elem_info
*cval
;
1481 struct snd_kcontrol
*kctl
;
1482 int i
, err
, nameid
, type
, len
;
1483 struct procunit_info
*info
;
1484 struct procunit_value_info
*valinfo
;
1485 const struct usbmix_name_map
*map
;
1486 static struct procunit_value_info default_value_info
[] = {
1487 { 0x01, "Switch", USB_MIXER_BOOLEAN
},
1490 static struct procunit_info default_info
= {
1491 0, NULL
, default_value_info
1494 if (desc
->bLength
< 13 || desc
->bLength
< 13 + num_ins
||
1495 desc
->bLength
< num_ins
+ uac_processing_unit_bControlSize(desc
, state
->mixer
->protocol
)) {
1496 snd_printk(KERN_ERR
"invalid %s descriptor (id %d)\n", name
, unitid
);
1500 for (i
= 0; i
< num_ins
; i
++) {
1501 if ((err
= parse_audio_unit(state
, desc
->baSourceID
[i
])) < 0)
1505 type
= le16_to_cpu(desc
->wProcessType
);
1506 for (info
= list
; info
&& info
->type
; info
++)
1507 if (info
->type
== type
)
1509 if (! info
|| ! info
->type
)
1510 info
= &default_info
;
1512 for (valinfo
= info
->values
; valinfo
->control
; valinfo
++) {
1513 __u8
*controls
= uac_processing_unit_bmControls(desc
, state
->mixer
->protocol
);
1515 if (! (controls
[valinfo
->control
/ 8] & (1 << ((valinfo
->control
% 8) - 1))))
1517 map
= find_map(state
, unitid
, valinfo
->control
);
1518 if (check_ignored_ctl(map
))
1520 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1522 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1525 cval
->mixer
= state
->mixer
;
1527 cval
->control
= valinfo
->control
;
1528 cval
->val_type
= valinfo
->val_type
;
1531 /* get min/max values */
1532 if (type
== UAC_PROCESS_UP_DOWNMIX
&& cval
->control
== UAC_UD_MODE_SELECT
) {
1533 __u8
*control_spec
= uac_processing_unit_specific(desc
, state
->mixer
->protocol
);
1534 /* FIXME: hard-coded */
1536 cval
->max
= control_spec
[0];
1538 cval
->initialized
= 1;
1540 if (type
== USB_XU_CLOCK_RATE
) {
1541 /* E-Mu USB 0404/0202/TrackerPre
1542 * samplerate control quirk
1547 cval
->initialized
= 1;
1549 get_min_max(cval
, valinfo
->min_value
);
1552 kctl
= snd_ctl_new1(&mixer_procunit_ctl
, cval
);
1554 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1558 kctl
->private_free
= usb_mixer_elem_free
;
1560 if (check_mapped_name(map
, kctl
->id
.name
,
1561 sizeof(kctl
->id
.name
)))
1563 else if (info
->name
)
1564 strlcpy(kctl
->id
.name
, info
->name
, sizeof(kctl
->id
.name
));
1566 nameid
= uac_processing_unit_iProcessing(desc
, state
->mixer
->protocol
);
1569 len
= snd_usb_copy_string_desc(state
, nameid
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1571 strlcpy(kctl
->id
.name
, name
, sizeof(kctl
->id
.name
));
1573 append_ctl_name(kctl
, " ");
1574 append_ctl_name(kctl
, valinfo
->suffix
);
1576 snd_printdd(KERN_INFO
"[%d] PU [%s] ch = %d, val = %d/%d\n",
1577 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
);
1578 if ((err
= add_control_to_empty(state
, kctl
)) < 0)
1585 static int parse_audio_processing_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1587 return build_audio_procunit(state
, unitid
, raw_desc
, procunits
, "Processing Unit");
1590 static int parse_audio_extension_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1592 /* Note that we parse extension units with processing unit descriptors.
1593 * That's ok as the layout is the same */
1594 return build_audio_procunit(state
, unitid
, raw_desc
, extunits
, "Extension Unit");
1602 /* info callback for selector unit
1603 * use an enumerator type for routing
1605 static int mixer_ctl_selector_info(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_info
*uinfo
)
1607 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1608 char **itemlist
= (char **)kcontrol
->private_value
;
1610 if (snd_BUG_ON(!itemlist
))
1612 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1614 uinfo
->value
.enumerated
.items
= cval
->max
;
1615 if ((int)uinfo
->value
.enumerated
.item
>= cval
->max
)
1616 uinfo
->value
.enumerated
.item
= cval
->max
- 1;
1617 strcpy(uinfo
->value
.enumerated
.name
, itemlist
[uinfo
->value
.enumerated
.item
]);
1621 /* get callback for selector unit */
1622 static int mixer_ctl_selector_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1624 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1627 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &val
);
1629 if (cval
->mixer
->ignore_ctl_error
) {
1630 ucontrol
->value
.enumerated
.item
[0] = 0;
1635 val
= get_relative_value(cval
, val
);
1636 ucontrol
->value
.enumerated
.item
[0] = val
;
1640 /* put callback for selector unit */
1641 static int mixer_ctl_selector_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1643 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1646 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &oval
);
1648 if (cval
->mixer
->ignore_ctl_error
)
1652 val
= ucontrol
->value
.enumerated
.item
[0];
1653 val
= get_abs_value(cval
, val
);
1655 set_cur_ctl_value(cval
, cval
->control
<< 8, val
);
1661 /* alsa control interface for selector unit */
1662 static struct snd_kcontrol_new mixer_selectunit_ctl
= {
1663 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1664 .name
= "", /* will be filled later */
1665 .info
= mixer_ctl_selector_info
,
1666 .get
= mixer_ctl_selector_get
,
1667 .put
= mixer_ctl_selector_put
,
1671 /* private free callback.
1672 * free both private_data and private_value
1674 static void usb_mixer_selector_elem_free(struct snd_kcontrol
*kctl
)
1678 if (kctl
->private_data
) {
1679 struct usb_mixer_elem_info
*cval
= kctl
->private_data
;
1680 num_ins
= cval
->max
;
1682 kctl
->private_data
= NULL
;
1684 if (kctl
->private_value
) {
1685 char **itemlist
= (char **)kctl
->private_value
;
1686 for (i
= 0; i
< num_ins
; i
++)
1689 kctl
->private_value
= 0;
1694 * parse a selector unit
1696 static int parse_audio_selector_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1698 struct uac_selector_unit_descriptor
*desc
= raw_desc
;
1699 unsigned int i
, nameid
, len
;
1701 struct usb_mixer_elem_info
*cval
;
1702 struct snd_kcontrol
*kctl
;
1703 const struct usbmix_name_map
*map
;
1706 if (!desc
->bNrInPins
|| desc
->bLength
< 5 + desc
->bNrInPins
) {
1707 snd_printk(KERN_ERR
"invalid SELECTOR UNIT descriptor %d\n", unitid
);
1711 for (i
= 0; i
< desc
->bNrInPins
; i
++) {
1712 if ((err
= parse_audio_unit(state
, desc
->baSourceID
[i
])) < 0)
1716 if (desc
->bNrInPins
== 1) /* only one ? nonsense! */
1719 map
= find_map(state
, unitid
, 0);
1720 if (check_ignored_ctl(map
))
1723 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1725 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1728 cval
->mixer
= state
->mixer
;
1730 cval
->val_type
= USB_MIXER_U8
;
1733 cval
->max
= desc
->bNrInPins
;
1735 cval
->initialized
= 1;
1737 if (desc
->bDescriptorSubtype
== UAC2_CLOCK_SELECTOR
)
1738 cval
->control
= UAC2_CX_CLOCK_SELECTOR
;
1742 namelist
= kmalloc(sizeof(char *) * desc
->bNrInPins
, GFP_KERNEL
);
1744 snd_printk(KERN_ERR
"cannot malloc\n");
1748 #define MAX_ITEM_NAME_LEN 64
1749 for (i
= 0; i
< desc
->bNrInPins
; i
++) {
1750 struct usb_audio_term iterm
;
1752 namelist
[i
] = kmalloc(MAX_ITEM_NAME_LEN
, GFP_KERNEL
);
1753 if (! namelist
[i
]) {
1754 snd_printk(KERN_ERR
"cannot malloc\n");
1761 len
= check_mapped_selector_name(state
, unitid
, i
, namelist
[i
],
1763 if (! len
&& check_input_term(state
, desc
->baSourceID
[i
], &iterm
) >= 0)
1764 len
= get_term_name(state
, &iterm
, namelist
[i
], MAX_ITEM_NAME_LEN
, 0);
1766 sprintf(namelist
[i
], "Input %d", i
);
1769 kctl
= snd_ctl_new1(&mixer_selectunit_ctl
, cval
);
1771 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1776 kctl
->private_value
= (unsigned long)namelist
;
1777 kctl
->private_free
= usb_mixer_selector_elem_free
;
1779 nameid
= uac_selector_unit_iSelector(desc
);
1780 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1784 snd_usb_copy_string_desc(state
, nameid
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1786 len
= get_term_name(state
, &state
->oterm
,
1787 kctl
->id
.name
, sizeof(kctl
->id
.name
), 0);
1789 strlcpy(kctl
->id
.name
, "USB", sizeof(kctl
->id
.name
));
1791 if (desc
->bDescriptorSubtype
== UAC2_CLOCK_SELECTOR
)
1792 append_ctl_name(kctl
, " Clock Source");
1793 else if ((state
->oterm
.type
& 0xff00) == 0x0100)
1794 append_ctl_name(kctl
, " Capture Source");
1796 append_ctl_name(kctl
, " Playback Source");
1799 snd_printdd(KERN_INFO
"[%d] SU [%s] items = %d\n",
1800 cval
->id
, kctl
->id
.name
, desc
->bNrInPins
);
1801 if ((err
= add_control_to_empty(state
, kctl
)) < 0)
1809 * parse an audio unit recursively
1812 static int parse_audio_unit(struct mixer_build
*state
, int unitid
)
1816 if (test_and_set_bit(unitid
, state
->unitbitmap
))
1817 return 0; /* the unit already visited */
1819 p1
= find_audio_control_unit(state
, unitid
);
1821 snd_printk(KERN_ERR
"usbaudio: unit %d not found!\n", unitid
);
1826 case UAC_INPUT_TERMINAL
:
1827 case UAC2_CLOCK_SOURCE
:
1829 case UAC_MIXER_UNIT
:
1830 return parse_audio_mixer_unit(state
, unitid
, p1
);
1831 case UAC_SELECTOR_UNIT
:
1832 case UAC2_CLOCK_SELECTOR
:
1833 return parse_audio_selector_unit(state
, unitid
, p1
);
1834 case UAC_FEATURE_UNIT
:
1835 return parse_audio_feature_unit(state
, unitid
, p1
);
1836 case UAC_PROCESSING_UNIT_V1
:
1837 /* UAC2_EFFECT_UNIT has the same value */
1838 if (state
->mixer
->protocol
== UAC_VERSION_1
)
1839 return parse_audio_processing_unit(state
, unitid
, p1
);
1841 return 0; /* FIXME - effect units not implemented yet */
1842 case UAC_EXTENSION_UNIT_V1
:
1843 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1844 if (state
->mixer
->protocol
== UAC_VERSION_1
)
1845 return parse_audio_extension_unit(state
, unitid
, p1
);
1846 else /* UAC_VERSION_2 */
1847 return parse_audio_processing_unit(state
, unitid
, p1
);
1849 snd_printk(KERN_ERR
"usbaudio: unit %u: unexpected type 0x%02x\n", unitid
, p1
[2]);
1854 static void snd_usb_mixer_free(struct usb_mixer_interface
*mixer
)
1856 kfree(mixer
->id_elems
);
1858 kfree(mixer
->urb
->transfer_buffer
);
1859 usb_free_urb(mixer
->urb
);
1861 usb_free_urb(mixer
->rc_urb
);
1862 kfree(mixer
->rc_setup_packet
);
1866 static int snd_usb_mixer_dev_free(struct snd_device
*device
)
1868 struct usb_mixer_interface
*mixer
= device
->device_data
;
1869 snd_usb_mixer_free(mixer
);
1874 * create mixer controls
1876 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1878 static int snd_usb_mixer_controls(struct usb_mixer_interface
*mixer
)
1880 struct mixer_build state
;
1882 const struct usbmix_ctl_map
*map
;
1883 struct usb_host_interface
*hostif
;
1886 hostif
= &usb_ifnum_to_if(mixer
->chip
->dev
, mixer
->ctrlif
)->altsetting
[0];
1887 memset(&state
, 0, sizeof(state
));
1888 state
.chip
= mixer
->chip
;
1889 state
.mixer
= mixer
;
1890 state
.buffer
= hostif
->extra
;
1891 state
.buflen
= hostif
->extralen
;
1893 /* check the mapping table */
1894 for (map
= usbmix_ctl_maps
; map
->id
; map
++) {
1895 if (map
->id
== state
.chip
->usb_id
) {
1896 state
.map
= map
->map
;
1897 state
.selector_map
= map
->selector_map
;
1898 mixer
->ignore_ctl_error
= map
->ignore_ctl_error
;
1904 while ((p
= snd_usb_find_csint_desc(hostif
->extra
, hostif
->extralen
, p
, UAC_OUTPUT_TERMINAL
)) != NULL
) {
1905 if (mixer
->protocol
== UAC_VERSION_1
) {
1906 struct uac_output_terminal_descriptor_v1
*desc
= p
;
1908 if (desc
->bLength
< sizeof(*desc
))
1909 continue; /* invalid descriptor? */
1910 set_bit(desc
->bTerminalID
, state
.unitbitmap
); /* mark terminal ID as visited */
1911 state
.oterm
.id
= desc
->bTerminalID
;
1912 state
.oterm
.type
= le16_to_cpu(desc
->wTerminalType
);
1913 state
.oterm
.name
= desc
->iTerminal
;
1914 err
= parse_audio_unit(&state
, desc
->bSourceID
);
1917 } else { /* UAC_VERSION_2 */
1918 struct uac2_output_terminal_descriptor
*desc
= p
;
1920 if (desc
->bLength
< sizeof(*desc
))
1921 continue; /* invalid descriptor? */
1922 set_bit(desc
->bTerminalID
, state
.unitbitmap
); /* mark terminal ID as visited */
1923 state
.oterm
.id
= desc
->bTerminalID
;
1924 state
.oterm
.type
= le16_to_cpu(desc
->wTerminalType
);
1925 state
.oterm
.name
= desc
->iTerminal
;
1926 err
= parse_audio_unit(&state
, desc
->bSourceID
);
1930 /* for UAC2, use the same approach to also add the clock selectors */
1931 err
= parse_audio_unit(&state
, desc
->bCSourceID
);
1940 void snd_usb_mixer_notify_id(struct usb_mixer_interface
*mixer
, int unitid
)
1942 struct usb_mixer_elem_info
*info
;
1944 for (info
= mixer
->id_elems
[unitid
]; info
; info
= info
->next_id_elem
)
1945 snd_ctl_notify(mixer
->chip
->card
, SNDRV_CTL_EVENT_MASK_VALUE
,
1949 static void snd_usb_mixer_dump_cval(struct snd_info_buffer
*buffer
,
1951 struct usb_mixer_elem_info
*cval
)
1953 static char *val_types
[] = {"BOOLEAN", "INV_BOOLEAN",
1954 "S8", "U8", "S16", "U16"};
1955 snd_iprintf(buffer
, " Unit: %i\n", unitid
);
1957 snd_iprintf(buffer
, " Control: name=\"%s\", index=%i\n",
1958 cval
->elem_id
->name
, cval
->elem_id
->index
);
1959 snd_iprintf(buffer
, " Info: id=%i, control=%i, cmask=0x%x, "
1960 "channels=%i, type=\"%s\"\n", cval
->id
,
1961 cval
->control
, cval
->cmask
, cval
->channels
,
1962 val_types
[cval
->val_type
]);
1963 snd_iprintf(buffer
, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
1964 cval
->min
, cval
->max
, cval
->dBmin
, cval
->dBmax
);
1967 static void snd_usb_mixer_proc_read(struct snd_info_entry
*entry
,
1968 struct snd_info_buffer
*buffer
)
1970 struct snd_usb_audio
*chip
= entry
->private_data
;
1971 struct usb_mixer_interface
*mixer
;
1972 struct usb_mixer_elem_info
*cval
;
1975 list_for_each_entry(mixer
, &chip
->mixer_list
, list
) {
1977 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
1978 chip
->usb_id
, mixer
->ctrlif
,
1979 mixer
->ignore_ctl_error
);
1980 snd_iprintf(buffer
, "Card: %s\n", chip
->card
->longname
);
1981 for (unitid
= 0; unitid
< MAX_ID_ELEMS
; unitid
++) {
1982 for (cval
= mixer
->id_elems
[unitid
]; cval
;
1983 cval
= cval
->next_id_elem
)
1984 snd_usb_mixer_dump_cval(buffer
, unitid
, cval
);
1989 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface
*mixer
,
1990 int attribute
, int value
, int index
)
1992 struct usb_mixer_elem_info
*info
;
1993 __u8 unitid
= (index
>> 8) & 0xff;
1994 __u8 control
= (value
>> 8) & 0xff;
1995 __u8 channel
= value
& 0xff;
1997 if (channel
>= MAX_CHANNELS
) {
1998 snd_printk(KERN_DEBUG
"%s(): bogus channel number %d\n",
2003 for (info
= mixer
->id_elems
[unitid
]; info
; info
= info
->next_id_elem
) {
2004 if (info
->control
!= control
)
2007 switch (attribute
) {
2009 /* invalidate cache, so the value is read from the device */
2011 info
->cached
&= ~(1 << channel
);
2012 else /* master channel */
2015 snd_ctl_notify(mixer
->chip
->card
, SNDRV_CTL_EVENT_MASK_VALUE
,
2028 snd_printk(KERN_DEBUG
"unknown attribute %d in interrupt\n",
2035 static void snd_usb_mixer_interrupt(struct urb
*urb
)
2037 struct usb_mixer_interface
*mixer
= urb
->context
;
2038 int len
= urb
->actual_length
;
2040 if (urb
->status
!= 0)
2043 if (mixer
->protocol
== UAC_VERSION_1
) {
2044 struct uac1_status_word
*status
;
2046 for (status
= urb
->transfer_buffer
;
2047 len
>= sizeof(*status
);
2048 len
-= sizeof(*status
), status
++) {
2049 snd_printd(KERN_DEBUG
"status interrupt: %02x %02x\n",
2050 status
->bStatusType
,
2051 status
->bOriginator
);
2053 /* ignore any notifications not from the control interface */
2054 if ((status
->bStatusType
& UAC1_STATUS_TYPE_ORIG_MASK
) !=
2055 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF
)
2058 if (status
->bStatusType
& UAC1_STATUS_TYPE_MEM_CHANGED
)
2059 snd_usb_mixer_rc_memory_change(mixer
, status
->bOriginator
);
2061 snd_usb_mixer_notify_id(mixer
, status
->bOriginator
);
2063 } else { /* UAC_VERSION_2 */
2064 struct uac2_interrupt_data_msg
*msg
;
2066 for (msg
= urb
->transfer_buffer
;
2067 len
>= sizeof(*msg
);
2068 len
-= sizeof(*msg
), msg
++) {
2069 /* drop vendor specific and endpoint requests */
2070 if ((msg
->bInfo
& UAC2_INTERRUPT_DATA_MSG_VENDOR
) ||
2071 (msg
->bInfo
& UAC2_INTERRUPT_DATA_MSG_EP
))
2074 snd_usb_mixer_interrupt_v2(mixer
, msg
->bAttribute
,
2075 le16_to_cpu(msg
->wValue
),
2076 le16_to_cpu(msg
->wIndex
));
2081 if (urb
->status
!= -ENOENT
&& urb
->status
!= -ECONNRESET
) {
2082 urb
->dev
= mixer
->chip
->dev
;
2083 usb_submit_urb(urb
, GFP_ATOMIC
);
2087 /* create the handler for the optional status interrupt endpoint */
2088 static int snd_usb_mixer_status_create(struct usb_mixer_interface
*mixer
)
2090 struct usb_host_interface
*hostif
;
2091 struct usb_endpoint_descriptor
*ep
;
2092 void *transfer_buffer
;
2096 hostif
= &usb_ifnum_to_if(mixer
->chip
->dev
, mixer
->ctrlif
)->altsetting
[0];
2097 /* we need one interrupt input endpoint */
2098 if (get_iface_desc(hostif
)->bNumEndpoints
< 1)
2100 ep
= get_endpoint(hostif
, 0);
2101 if (!usb_endpoint_dir_in(ep
) || !usb_endpoint_xfer_int(ep
))
2104 epnum
= usb_endpoint_num(ep
);
2105 buffer_length
= le16_to_cpu(ep
->wMaxPacketSize
);
2106 transfer_buffer
= kmalloc(buffer_length
, GFP_KERNEL
);
2107 if (!transfer_buffer
)
2109 mixer
->urb
= usb_alloc_urb(0, GFP_KERNEL
);
2111 kfree(transfer_buffer
);
2114 usb_fill_int_urb(mixer
->urb
, mixer
->chip
->dev
,
2115 usb_rcvintpipe(mixer
->chip
->dev
, epnum
),
2116 transfer_buffer
, buffer_length
,
2117 snd_usb_mixer_interrupt
, mixer
, ep
->bInterval
);
2118 usb_submit_urb(mixer
->urb
, GFP_KERNEL
);
2122 int snd_usb_create_mixer(struct snd_usb_audio
*chip
, int ctrlif
,
2125 static struct snd_device_ops dev_ops
= {
2126 .dev_free
= snd_usb_mixer_dev_free
2128 struct usb_mixer_interface
*mixer
;
2129 struct snd_info_entry
*entry
;
2130 struct usb_host_interface
*host_iface
;
2133 strcpy(chip
->card
->mixername
, "USB Mixer");
2135 mixer
= kzalloc(sizeof(*mixer
), GFP_KERNEL
);
2139 mixer
->ctrlif
= ctrlif
;
2140 mixer
->ignore_ctl_error
= ignore_error
;
2141 mixer
->id_elems
= kcalloc(MAX_ID_ELEMS
, sizeof(*mixer
->id_elems
),
2143 if (!mixer
->id_elems
) {
2148 host_iface
= &usb_ifnum_to_if(chip
->dev
, ctrlif
)->altsetting
[0];
2149 mixer
->protocol
= get_iface_desc(host_iface
)->bInterfaceProtocol
;
2151 if ((err
= snd_usb_mixer_controls(mixer
)) < 0 ||
2152 (err
= snd_usb_mixer_status_create(mixer
)) < 0)
2155 snd_usb_mixer_apply_create_quirk(mixer
);
2157 err
= snd_device_new(chip
->card
, SNDRV_DEV_LOWLEVEL
, mixer
, &dev_ops
);
2161 if (list_empty(&chip
->mixer_list
) &&
2162 !snd_card_proc_new(chip
->card
, "usbmixer", &entry
))
2163 snd_info_set_text_ops(entry
, chip
, snd_usb_mixer_proc_read
);
2165 list_add(&mixer
->list
, &chip
->mixer_list
);
2169 snd_usb_mixer_free(mixer
);
2173 void snd_usb_mixer_disconnect(struct list_head
*p
)
2175 struct usb_mixer_interface
*mixer
;
2177 mixer
= list_entry(p
, struct usb_mixer_interface
, list
);
2178 usb_kill_urb(mixer
->urb
);
2179 usb_kill_urb(mixer
->rc_urb
);