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
[2 + 3*sizeof(__u16
)]; /* enough space for one range */
305 if (request
== UAC_GET_CUR
) {
306 bRequest
= UAC2_CS_CUR
;
307 size
= sizeof(__u16
);
309 bRequest
= UAC2_CS_RANGE
;
313 memset(buf
, 0, sizeof(buf
));
315 ret
= snd_usb_ctl_msg(cval
->mixer
->chip
->dev
,
316 usb_rcvctrlpipe(cval
->mixer
->chip
->dev
, 0),
318 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_IN
,
319 validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8),
323 snd_printk(KERN_ERR
"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
324 request
, validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8), cval
->val_type
);
328 /* FIXME: how should we handle multiple triplets here? */
335 val
= buf
+ sizeof(__u16
);
338 val
= buf
+ sizeof(__u16
) * 2;
341 val
= buf
+ sizeof(__u16
) * 3;
347 *value_ret
= convert_signed_value(cval
, snd_usb_combine_bytes(val
, sizeof(__u16
)));
352 static int get_ctl_value(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
354 return (cval
->mixer
->protocol
== UAC_VERSION_1
) ?
355 get_ctl_value_v1(cval
, request
, validx
, value_ret
) :
356 get_ctl_value_v2(cval
, request
, validx
, value_ret
);
359 static int get_cur_ctl_value(struct usb_mixer_elem_info
*cval
, int validx
, int *value
)
361 return get_ctl_value(cval
, UAC_GET_CUR
, validx
, value
);
364 /* channel = 0: master, 1 = first channel */
365 static inline int get_cur_mix_raw(struct usb_mixer_elem_info
*cval
,
366 int channel
, int *value
)
368 return get_ctl_value(cval
, UAC_GET_CUR
, (cval
->control
<< 8) | channel
, value
);
371 static int get_cur_mix_value(struct usb_mixer_elem_info
*cval
,
372 int channel
, int index
, int *value
)
376 if (cval
->cached
& (1 << channel
)) {
377 *value
= cval
->cache_val
[index
];
380 err
= get_cur_mix_raw(cval
, channel
, value
);
382 if (!cval
->mixer
->ignore_ctl_error
)
383 snd_printd(KERN_ERR
"cannot get current value for control %d ch %d: err = %d\n",
384 cval
->control
, channel
, err
);
387 cval
->cached
|= 1 << channel
;
388 cval
->cache_val
[index
] = *value
;
397 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info
*cval
,
398 int request
, int validx
, int value_set
)
400 unsigned char buf
[2];
401 int val_len
, timeout
= 10;
403 if (cval
->mixer
->protocol
== UAC_VERSION_1
) {
404 val_len
= cval
->val_type
>= USB_MIXER_S16
? 2 : 1;
405 } else { /* UAC_VERSION_2 */
406 /* audio class v2 controls are always 2 bytes in size */
407 val_len
= sizeof(__u16
);
410 if (request
!= UAC_SET_CUR
) {
411 snd_printdd(KERN_WARNING
"RANGE setting not yet supported\n");
415 request
= UAC2_CS_CUR
;
418 value_set
= convert_bytes_value(cval
, value_set
);
419 buf
[0] = value_set
& 0xff;
420 buf
[1] = (value_set
>> 8) & 0xff;
421 while (timeout
-- > 0)
422 if (snd_usb_ctl_msg(cval
->mixer
->chip
->dev
,
423 usb_sndctrlpipe(cval
->mixer
->chip
->dev
, 0),
425 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_OUT
,
426 validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8),
427 buf
, val_len
, 100) >= 0)
429 snd_printdd(KERN_ERR
"cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
430 request
, validx
, cval
->mixer
->ctrlif
| (cval
->id
<< 8), cval
->val_type
, buf
[0], buf
[1]);
434 static int set_cur_ctl_value(struct usb_mixer_elem_info
*cval
, int validx
, int value
)
436 return snd_usb_mixer_set_ctl_value(cval
, UAC_SET_CUR
, validx
, value
);
439 static int set_cur_mix_value(struct usb_mixer_elem_info
*cval
, int channel
,
440 int index
, int value
)
443 unsigned int read_only
= (channel
== 0) ?
444 cval
->master_readonly
:
445 cval
->ch_readonly
& (1 << (channel
- 1));
448 snd_printdd(KERN_INFO
"%s(): channel %d of control %d is read_only\n",
449 __func__
, channel
, cval
->control
);
453 err
= snd_usb_mixer_set_ctl_value(cval
, UAC_SET_CUR
, (cval
->control
<< 8) | channel
,
457 cval
->cached
|= 1 << channel
;
458 cval
->cache_val
[index
] = value
;
463 * TLV callback for mixer volume controls
465 static int mixer_vol_tlv(struct snd_kcontrol
*kcontrol
, int op_flag
,
466 unsigned int size
, unsigned int __user
*_tlv
)
468 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
469 DECLARE_TLV_DB_MINMAX(scale
, 0, 0);
471 if (size
< sizeof(scale
))
473 scale
[2] = cval
->dBmin
;
474 scale
[3] = cval
->dBmax
;
475 if (copy_to_user(_tlv
, scale
, sizeof(scale
)))
481 * parser routines begin here...
484 static int parse_audio_unit(struct mixer_build
*state
, int unitid
);
488 * check if the input/output channel routing is enabled on the given bitmap.
489 * used for mixer unit parser
491 static int check_matrix_bitmap(unsigned char *bmap
, int ich
, int och
, int num_outs
)
493 int idx
= ich
* num_outs
+ och
;
494 return bmap
[idx
>> 3] & (0x80 >> (idx
& 7));
499 * add an alsa control element
500 * search and increment the index until an empty slot is found.
502 * if failed, give up and free the control instance.
505 static int add_control_to_empty(struct mixer_build
*state
, struct snd_kcontrol
*kctl
)
507 struct usb_mixer_elem_info
*cval
= kctl
->private_data
;
510 while (snd_ctl_find_id(state
->chip
->card
, &kctl
->id
))
512 if ((err
= snd_ctl_add(state
->chip
->card
, kctl
)) < 0) {
513 snd_printd(KERN_ERR
"cannot add control (err = %d)\n", err
);
516 cval
->elem_id
= &kctl
->id
;
517 cval
->next_id_elem
= state
->mixer
->id_elems
[cval
->id
];
518 state
->mixer
->id_elems
[cval
->id
] = cval
;
524 * get a terminal name string
527 static struct iterm_name_combo
{
531 { 0x0300, "Output" },
532 { 0x0301, "Speaker" },
533 { 0x0302, "Headphone" },
534 { 0x0303, "HMD Audio" },
535 { 0x0304, "Desktop Speaker" },
536 { 0x0305, "Room Speaker" },
537 { 0x0306, "Com Speaker" },
539 { 0x0600, "External In" },
540 { 0x0601, "Analog In" },
541 { 0x0602, "Digital In" },
543 { 0x0604, "Legacy In" },
544 { 0x0605, "IEC958 In" },
545 { 0x0606, "1394 DA Stream" },
546 { 0x0607, "1394 DV Stream" },
547 { 0x0700, "Embedded" },
548 { 0x0701, "Noise Source" },
549 { 0x0702, "Equalization Noise" },
553 { 0x0706, "MiniDisk" },
554 { 0x0707, "Analog Tape" },
555 { 0x0708, "Phonograph" },
556 { 0x0709, "VCR Audio" },
557 { 0x070a, "Video Disk Audio" },
558 { 0x070b, "DVD Audio" },
559 { 0x070c, "TV Tuner Audio" },
560 { 0x070d, "Satellite Rec Audio" },
561 { 0x070e, "Cable Tuner Audio" },
562 { 0x070f, "DSS Audio" },
563 { 0x0710, "Radio Receiver" },
564 { 0x0711, "Radio Transmitter" },
565 { 0x0712, "Multi-Track Recorder" },
566 { 0x0713, "Synthesizer" },
570 static int get_term_name(struct mixer_build
*state
, struct usb_audio_term
*iterm
,
571 unsigned char *name
, int maxlen
, int term_only
)
573 struct iterm_name_combo
*names
;
576 return snd_usb_copy_string_desc(state
, iterm
->name
, name
, maxlen
);
578 /* virtual type - not a real terminal */
579 if (iterm
->type
>> 16) {
582 switch (iterm
->type
>> 16) {
583 case UAC_SELECTOR_UNIT
:
584 strcpy(name
, "Selector"); return 8;
585 case UAC_PROCESSING_UNIT_V1
:
586 strcpy(name
, "Process Unit"); return 12;
587 case UAC_EXTENSION_UNIT_V1
:
588 strcpy(name
, "Ext Unit"); return 8;
590 strcpy(name
, "Mixer"); return 5;
592 return sprintf(name
, "Unit %d", iterm
->id
);
596 switch (iterm
->type
& 0xff00) {
598 strcpy(name
, "PCM"); return 3;
600 strcpy(name
, "Mic"); return 3;
602 strcpy(name
, "Headset"); return 7;
604 strcpy(name
, "Phone"); return 5;
607 for (names
= iterm_names
; names
->type
; names
++)
608 if (names
->type
== iterm
->type
) {
609 strcpy(name
, names
->name
);
610 return strlen(names
->name
);
617 * parse the source unit recursively until it reaches to a terminal
618 * or a branched unit.
620 static int check_input_term(struct mixer_build
*state
, int id
, struct usb_audio_term
*term
)
625 memset(term
, 0, sizeof(*term
));
626 while ((p1
= find_audio_control_unit(state
, id
)) != NULL
) {
627 unsigned char *hdr
= p1
;
630 case UAC_INPUT_TERMINAL
:
631 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
632 struct uac_input_terminal_descriptor
*d
= p1
;
633 term
->type
= le16_to_cpu(d
->wTerminalType
);
634 term
->channels
= d
->bNrChannels
;
635 term
->chconfig
= le16_to_cpu(d
->wChannelConfig
);
636 term
->name
= d
->iTerminal
;
637 } else { /* UAC_VERSION_2 */
638 struct uac2_input_terminal_descriptor
*d
= p1
;
639 term
->type
= le16_to_cpu(d
->wTerminalType
);
640 term
->channels
= d
->bNrChannels
;
641 term
->chconfig
= le32_to_cpu(d
->bmChannelConfig
);
642 term
->name
= d
->iTerminal
;
644 /* call recursively to get the clock selectors */
645 err
= check_input_term(state
, d
->bCSourceID
, term
);
650 case UAC_FEATURE_UNIT
: {
651 /* the header is the same for v1 and v2 */
652 struct uac_feature_unit_descriptor
*d
= p1
;
654 break; /* continue to parse */
656 case UAC_MIXER_UNIT
: {
657 struct uac_mixer_unit_descriptor
*d
= p1
;
658 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
659 term
->channels
= uac_mixer_unit_bNrChannels(d
);
660 term
->chconfig
= uac_mixer_unit_wChannelConfig(d
, state
->mixer
->protocol
);
661 term
->name
= uac_mixer_unit_iMixer(d
);
664 case UAC_SELECTOR_UNIT
:
665 case UAC2_CLOCK_SELECTOR
: {
666 struct uac_selector_unit_descriptor
*d
= p1
;
667 /* call recursively to retrieve the channel info */
668 if (check_input_term(state
, d
->baSourceID
[0], term
) < 0)
670 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
672 term
->name
= uac_selector_unit_iSelector(d
);
675 case UAC_PROCESSING_UNIT_V1
:
676 case UAC_EXTENSION_UNIT_V1
: {
677 struct uac_processing_unit_descriptor
*d
= p1
;
679 id
= d
->baSourceID
[0];
680 break; /* continue to parse */
682 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
683 term
->channels
= uac_processing_unit_bNrChannels(d
);
684 term
->chconfig
= uac_processing_unit_wChannelConfig(d
, state
->mixer
->protocol
);
685 term
->name
= uac_processing_unit_iProcessing(d
, state
->mixer
->protocol
);
688 case UAC2_CLOCK_SOURCE
: {
689 struct uac_clock_source_descriptor
*d
= p1
;
690 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
692 term
->name
= d
->iClockSource
;
707 /* feature unit control information */
708 struct usb_feature_control_info
{
710 unsigned int type
; /* control type (mute, volume, etc.) */
713 static struct usb_feature_control_info audio_feature_info
[] = {
714 { "Mute", USB_MIXER_INV_BOOLEAN
},
715 { "Volume", USB_MIXER_S16
},
716 { "Tone Control - Bass", USB_MIXER_S8
},
717 { "Tone Control - Mid", USB_MIXER_S8
},
718 { "Tone Control - Treble", USB_MIXER_S8
},
719 { "Graphic Equalizer", USB_MIXER_S8
}, /* FIXME: not implemeted yet */
720 { "Auto Gain Control", USB_MIXER_BOOLEAN
},
721 { "Delay Control", USB_MIXER_U16
},
722 { "Bass Boost", USB_MIXER_BOOLEAN
},
723 { "Loudness", USB_MIXER_BOOLEAN
},
725 { "Input Gain Control", USB_MIXER_U16
},
726 { "Input Gain Pad Control", USB_MIXER_BOOLEAN
},
727 { "Phase Inverter Control", USB_MIXER_BOOLEAN
},
731 /* private_free callback */
732 static void usb_mixer_elem_free(struct snd_kcontrol
*kctl
)
734 kfree(kctl
->private_data
);
735 kctl
->private_data
= NULL
;
740 * interface to ALSA control for feature/mixer units
744 * retrieve the minimum and maximum values for the specified control
746 static int get_min_max(struct usb_mixer_elem_info
*cval
, int default_min
)
749 cval
->min
= default_min
;
750 cval
->max
= cval
->min
+ 1;
752 cval
->dBmin
= cval
->dBmax
= 0;
754 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
755 cval
->val_type
== USB_MIXER_INV_BOOLEAN
) {
756 cval
->initialized
= 1;
761 for (i
= 0; i
< MAX_CHANNELS
; i
++)
762 if (cval
->cmask
& (1 << i
)) {
767 if (get_ctl_value(cval
, UAC_GET_MAX
, (cval
->control
<< 8) | minchn
, &cval
->max
) < 0 ||
768 get_ctl_value(cval
, UAC_GET_MIN
, (cval
->control
<< 8) | minchn
, &cval
->min
) < 0) {
769 snd_printd(KERN_ERR
"%d:%d: cannot get min/max values for control %d (id %d)\n",
770 cval
->id
, cval
->mixer
->ctrlif
, cval
->control
, cval
->id
);
773 if (get_ctl_value(cval
, UAC_GET_RES
, (cval
->control
<< 8) | minchn
, &cval
->res
) < 0) {
776 int last_valid_res
= cval
->res
;
778 while (cval
->res
> 1) {
779 if (snd_usb_mixer_set_ctl_value(cval
, UAC_SET_RES
,
780 (cval
->control
<< 8) | minchn
, cval
->res
/ 2) < 0)
784 if (get_ctl_value(cval
, UAC_GET_RES
, (cval
->control
<< 8) | minchn
, &cval
->res
) < 0)
785 cval
->res
= last_valid_res
;
790 /* Additional checks for the proper resolution
792 * Some devices report smaller resolutions than actually
793 * reacting. They don't return errors but simply clip
794 * to the lower aligned value.
796 if (cval
->min
+ cval
->res
< cval
->max
) {
797 int last_valid_res
= cval
->res
;
798 int saved
, test
, check
;
799 get_cur_mix_raw(cval
, minchn
, &saved
);
802 if (test
< cval
->max
)
806 if (test
< cval
->min
|| test
> cval
->max
||
807 set_cur_mix_value(cval
, minchn
, 0, test
) ||
808 get_cur_mix_raw(cval
, minchn
, &check
)) {
809 cval
->res
= last_valid_res
;
816 set_cur_mix_value(cval
, minchn
, 0, saved
);
819 cval
->initialized
= 1;
822 /* USB descriptions contain the dB scale in 1/256 dB unit
823 * while ALSA TLV contains in 1/100 dB unit
825 cval
->dBmin
= (convert_signed_value(cval
, cval
->min
) * 100) / 256;
826 cval
->dBmax
= (convert_signed_value(cval
, cval
->max
) * 100) / 256;
827 if (cval
->dBmin
> cval
->dBmax
) {
828 /* something is wrong; assume it's either from/to 0dB */
831 else if (cval
->dBmin
> 0)
833 if (cval
->dBmin
> cval
->dBmax
) {
834 /* totally crap, return an error */
843 /* get a feature/mixer unit info */
844 static int mixer_ctl_feature_info(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_info
*uinfo
)
846 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
848 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
849 cval
->val_type
== USB_MIXER_INV_BOOLEAN
)
850 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
852 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
853 uinfo
->count
= cval
->channels
;
854 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
855 cval
->val_type
== USB_MIXER_INV_BOOLEAN
) {
856 uinfo
->value
.integer
.min
= 0;
857 uinfo
->value
.integer
.max
= 1;
859 if (! cval
->initialized
)
860 get_min_max(cval
, 0);
861 uinfo
->value
.integer
.min
= 0;
862 uinfo
->value
.integer
.max
=
863 (cval
->max
- cval
->min
+ cval
->res
- 1) / cval
->res
;
868 /* get the current value from feature/mixer unit */
869 static int mixer_ctl_feature_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
871 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
872 int c
, cnt
, val
, err
;
874 ucontrol
->value
.integer
.value
[0] = cval
->min
;
877 for (c
= 0; c
< MAX_CHANNELS
; c
++) {
878 if (!(cval
->cmask
& (1 << c
)))
880 err
= get_cur_mix_value(cval
, c
+ 1, cnt
, &val
);
882 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
883 val
= get_relative_value(cval
, val
);
884 ucontrol
->value
.integer
.value
[cnt
] = val
;
890 err
= get_cur_mix_value(cval
, 0, 0, &val
);
892 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
893 val
= get_relative_value(cval
, val
);
894 ucontrol
->value
.integer
.value
[0] = val
;
899 /* put the current value to feature/mixer unit */
900 static int mixer_ctl_feature_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
902 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
903 int c
, cnt
, val
, oval
, err
;
908 for (c
= 0; c
< MAX_CHANNELS
; c
++) {
909 if (!(cval
->cmask
& (1 << c
)))
911 err
= get_cur_mix_value(cval
, c
+ 1, cnt
, &oval
);
913 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
914 val
= ucontrol
->value
.integer
.value
[cnt
];
915 val
= get_abs_value(cval
, val
);
917 set_cur_mix_value(cval
, c
+ 1, cnt
, val
);
924 err
= get_cur_mix_value(cval
, 0, 0, &oval
);
926 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
927 val
= ucontrol
->value
.integer
.value
[0];
928 val
= get_abs_value(cval
, val
);
930 set_cur_mix_value(cval
, 0, 0, val
);
937 static struct snd_kcontrol_new usb_feature_unit_ctl
= {
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
,
942 .put
= mixer_ctl_feature_put
,
945 /* the read-only variant */
946 static struct snd_kcontrol_new usb_feature_unit_ctl_ro
= {
947 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
948 .name
= "", /* will be filled later manually */
949 .info
= mixer_ctl_feature_info
,
950 .get
= mixer_ctl_feature_get
,
956 * build a feature control
959 static size_t append_ctl_name(struct snd_kcontrol
*kctl
, const char *str
)
961 return strlcat(kctl
->id
.name
, str
, sizeof(kctl
->id
.name
));
964 static void build_feature_ctl(struct mixer_build
*state
, void *raw_desc
,
965 unsigned int ctl_mask
, int control
,
966 struct usb_audio_term
*iterm
, int unitid
,
969 struct uac_feature_unit_descriptor
*desc
= raw_desc
;
970 unsigned int len
= 0;
972 int nameid
= uac_feature_unit_iFeature(desc
);
973 struct snd_kcontrol
*kctl
;
974 struct usb_mixer_elem_info
*cval
;
975 const struct usbmix_name_map
*map
;
977 control
++; /* change from zero-based to 1-based value */
979 if (control
== UAC_FU_GRAPHIC_EQUALIZER
) {
980 /* FIXME: not supported yet */
984 map
= find_map(state
, unitid
, control
);
985 if (check_ignored_ctl(map
))
988 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
990 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
993 cval
->mixer
= state
->mixer
;
995 cval
->control
= control
;
996 cval
->cmask
= ctl_mask
;
997 cval
->val_type
= audio_feature_info
[control
-1].type
;
999 cval
->channels
= 1; /* master channel */
1000 cval
->master_readonly
= readonly_mask
;
1003 for (i
= 0; i
< 16; i
++)
1004 if (ctl_mask
& (1 << i
))
1007 cval
->ch_readonly
= readonly_mask
;
1010 /* get min/max values */
1011 get_min_max(cval
, 0);
1013 /* if all channels in the mask are marked read-only, make the control
1014 * read-only. set_cur_mix_value() will check the mask again and won't
1015 * issue write commands to read-only channels. */
1016 if (cval
->channels
== readonly_mask
)
1017 kctl
= snd_ctl_new1(&usb_feature_unit_ctl_ro
, cval
);
1019 kctl
= snd_ctl_new1(&usb_feature_unit_ctl
, cval
);
1022 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1026 kctl
->private_free
= usb_mixer_elem_free
;
1028 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1029 mapped_name
= len
!= 0;
1030 if (! len
&& nameid
)
1031 len
= snd_usb_copy_string_desc(state
, nameid
,
1032 kctl
->id
.name
, sizeof(kctl
->id
.name
));
1037 /* determine the control name. the rule is:
1038 * - if a name id is given in descriptor, use it.
1039 * - if the connected input can be determined, then use the name
1041 * - if the connected output can be determined, use it.
1042 * - otherwise, anonymous name.
1045 len
= get_term_name(state
, iterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 1);
1047 len
= get_term_name(state
, &state
->oterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 1);
1049 len
= snprintf(kctl
->id
.name
, sizeof(kctl
->id
.name
),
1050 "Feature %d", unitid
);
1052 /* determine the stream direction:
1053 * if the connected output is USB stream, then it's likely a
1054 * capture stream. otherwise it should be playback (hopefully :)
1056 if (! mapped_name
&& ! (state
->oterm
.type
>> 16)) {
1057 if ((state
->oterm
.type
& 0xff00) == 0x0100) {
1058 len
= append_ctl_name(kctl
, " Capture");
1060 len
= append_ctl_name(kctl
, " Playback");
1063 append_ctl_name(kctl
, control
== UAC_FU_MUTE
?
1064 " Switch" : " Volume");
1065 if (control
== UAC_FU_VOLUME
) {
1066 kctl
->tlv
.c
= mixer_vol_tlv
;
1067 kctl
->vd
[0].access
|=
1068 SNDRV_CTL_ELEM_ACCESS_TLV_READ
|
1069 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK
;
1070 check_mapped_dB(map
, cval
);
1076 strlcpy(kctl
->id
.name
, audio_feature_info
[control
-1].name
,
1077 sizeof(kctl
->id
.name
));
1081 /* volume control quirks */
1082 switch (state
->chip
->usb_id
) {
1083 case USB_ID(0x0471, 0x0101):
1084 case USB_ID(0x0471, 0x0104):
1085 case USB_ID(0x0471, 0x0105):
1086 case USB_ID(0x0672, 0x1041):
1087 /* quirk for UDA1321/N101.
1088 * note that detection between firmware 2.1.1.7 (N101)
1089 * and later 2.1.1.21 is not very clear from datasheets.
1090 * I hope that the min value is -15360 for newer firmware --jk
1092 if (!strcmp(kctl
->id
.name
, "PCM Playback Volume") &&
1093 cval
->min
== -15616) {
1094 snd_printk(KERN_INFO
1095 "set volume quirk for UDA1321/N101 chip\n");
1100 case USB_ID(0x046d, 0x09a4):
1101 if (!strcmp(kctl
->id
.name
, "Mic Capture Volume")) {
1102 snd_printk(KERN_INFO
1103 "set volume quirk for QuickCam E3500\n");
1110 case USB_ID(0x046d, 0x0809):
1111 case USB_ID(0x046d, 0x0991):
1112 /* Most audio usb devices lie about volume resolution.
1113 * Most Logitech webcams have res = 384.
1114 * Proboly there is some logitech magic behind this number --fishor
1116 if (!strcmp(kctl
->id
.name
, "Mic Capture Volume")) {
1117 snd_printk(KERN_INFO
1118 "set resolution quirk: cval->res = 384\n");
1125 snd_printdd(KERN_INFO
"[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1126 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
, cval
->res
);
1127 add_control_to_empty(state
, kctl
);
1133 * parse a feature unit
1135 * most of controlls are defined here.
1137 static int parse_audio_feature_unit(struct mixer_build
*state
, int unitid
, void *_ftr
)
1140 struct usb_audio_term iterm
;
1141 unsigned int master_bits
, first_ch_bits
;
1143 struct uac_feature_unit_descriptor
*hdr
= _ftr
;
1146 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
1147 csize
= hdr
->bControlSize
;
1148 channels
= (hdr
->bLength
- 7) / csize
- 1;
1149 bmaControls
= hdr
->bmaControls
;
1151 struct uac2_feature_unit_descriptor
*ftr
= _ftr
;
1153 channels
= (hdr
->bLength
- 6) / 4 - 1;
1154 bmaControls
= ftr
->bmaControls
;
1157 if (hdr
->bLength
< 7 || !csize
|| hdr
->bLength
< 7 + csize
) {
1158 snd_printk(KERN_ERR
"usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid
);
1162 /* parse the source unit */
1163 if ((err
= parse_audio_unit(state
, hdr
->bSourceID
)) < 0)
1166 /* determine the input source type and name */
1167 if (check_input_term(state
, hdr
->bSourceID
, &iterm
) < 0)
1170 master_bits
= snd_usb_combine_bytes(bmaControls
, csize
);
1171 /* master configuration quirks */
1172 switch (state
->chip
->usb_id
) {
1173 case USB_ID(0x08bb, 0x2702):
1174 snd_printk(KERN_INFO
1175 "usbmixer: master volume quirk for PCM2702 chip\n");
1176 /* disable non-functional volume control */
1177 master_bits
&= ~UAC_CONTROL_BIT(UAC_FU_VOLUME
);
1181 first_ch_bits
= snd_usb_combine_bytes(bmaControls
+ csize
, csize
);
1185 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
1186 /* check all control types */
1187 for (i
= 0; i
< 10; i
++) {
1188 unsigned int ch_bits
= 0;
1189 for (j
= 0; j
< channels
; j
++) {
1190 unsigned int mask
= snd_usb_combine_bytes(bmaControls
+ csize
* (j
+1), csize
);
1191 if (mask
& (1 << i
))
1192 ch_bits
|= (1 << j
);
1194 /* audio class v1 controls are never read-only */
1195 if (ch_bits
& 1) /* the first channel must be set (for ease of programming) */
1196 build_feature_ctl(state
, _ftr
, ch_bits
, i
, &iterm
, unitid
, 0);
1197 if (master_bits
& (1 << i
))
1198 build_feature_ctl(state
, _ftr
, 0, i
, &iterm
, unitid
, 0);
1200 } else { /* UAC_VERSION_2 */
1201 for (i
= 0; i
< 30/2; i
++) {
1202 /* From the USB Audio spec v2.0:
1203 bmaControls() is a (ch+1)-element array of 4-byte bitmaps,
1204 each containing a set of bit pairs. If a Control is present,
1205 it must be Host readable. If a certain Control is not
1206 present then the bit pair must be set to 0b00.
1207 If a Control is present but read-only, the bit pair must be
1208 set to 0b01. If a Control is also Host programmable, the bit
1209 pair must be set to 0b11. The value 0b10 is not allowed. */
1210 unsigned int ch_bits
= 0;
1211 unsigned int ch_read_only
= 0;
1213 for (j
= 0; j
< channels
; j
++) {
1214 unsigned int mask
= snd_usb_combine_bytes(bmaControls
+ csize
* (j
+1), csize
);
1215 if (uac2_control_is_readable(mask
, i
)) {
1216 ch_bits
|= (1 << j
);
1217 if (!uac2_control_is_writeable(mask
, i
))
1218 ch_read_only
|= (1 << j
);
1222 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1223 * are marked read-only in the descriptors. Otherwise, the control will be
1224 * reported as writeable, but the driver will not actually issue a write
1225 * command for read-only channels */
1226 if (ch_bits
& 1) /* the first channel must be set (for ease of programming) */
1227 build_feature_ctl(state
, _ftr
, ch_bits
, i
, &iterm
, unitid
, ch_read_only
);
1228 if (uac2_control_is_readable(master_bits
, i
))
1229 build_feature_ctl(state
, _ftr
, 0, i
, &iterm
, unitid
,
1230 !uac2_control_is_writeable(master_bits
, i
));
1243 * build a mixer unit control
1245 * the callbacks are identical with feature unit.
1246 * input channel number (zero based) is given in control field instead.
1249 static void build_mixer_unit_ctl(struct mixer_build
*state
,
1250 struct uac_mixer_unit_descriptor
*desc
,
1251 int in_pin
, int in_ch
, int unitid
,
1252 struct usb_audio_term
*iterm
)
1254 struct usb_mixer_elem_info
*cval
;
1255 unsigned int num_outs
= uac_mixer_unit_bNrChannels(desc
);
1256 unsigned int i
, len
;
1257 struct snd_kcontrol
*kctl
;
1258 const struct usbmix_name_map
*map
;
1260 map
= find_map(state
, unitid
, 0);
1261 if (check_ignored_ctl(map
))
1264 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1268 cval
->mixer
= state
->mixer
;
1270 cval
->control
= in_ch
+ 1; /* based on 1 */
1271 cval
->val_type
= USB_MIXER_S16
;
1272 for (i
= 0; i
< num_outs
; i
++) {
1273 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc
, state
->mixer
->protocol
), in_ch
, i
, num_outs
)) {
1274 cval
->cmask
|= (1 << i
);
1279 /* get min/max values */
1280 get_min_max(cval
, 0);
1282 kctl
= snd_ctl_new1(&usb_feature_unit_ctl
, cval
);
1284 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1288 kctl
->private_free
= usb_mixer_elem_free
;
1290 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1292 len
= get_term_name(state
, iterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 0);
1294 len
= sprintf(kctl
->id
.name
, "Mixer Source %d", in_ch
+ 1);
1295 append_ctl_name(kctl
, " Volume");
1297 snd_printdd(KERN_INFO
"[%d] MU [%s] ch = %d, val = %d/%d\n",
1298 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
);
1299 add_control_to_empty(state
, kctl
);
1304 * parse a mixer unit
1306 static int parse_audio_mixer_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1308 struct uac_mixer_unit_descriptor
*desc
= raw_desc
;
1309 struct usb_audio_term iterm
;
1310 int input_pins
, num_ins
, num_outs
;
1313 if (desc
->bLength
< 11 || ! (input_pins
= desc
->bNrInPins
) || ! (num_outs
= uac_mixer_unit_bNrChannels(desc
))) {
1314 snd_printk(KERN_ERR
"invalid MIXER UNIT descriptor %d\n", unitid
);
1317 /* no bmControls field (e.g. Maya44) -> ignore */
1318 if (desc
->bLength
<= 10 + input_pins
) {
1319 snd_printdd(KERN_INFO
"MU %d has no bmControls field\n", unitid
);
1325 for (pin
= 0; pin
< input_pins
; pin
++) {
1326 err
= parse_audio_unit(state
, desc
->baSourceID
[pin
]);
1329 err
= check_input_term(state
, desc
->baSourceID
[pin
], &iterm
);
1332 num_ins
+= iterm
.channels
;
1333 for (; ich
< num_ins
; ++ich
) {
1334 int och
, ich_has_controls
= 0;
1336 for (och
= 0; och
< num_outs
; ++och
) {
1337 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc
, state
->mixer
->protocol
),
1338 ich
, och
, num_outs
)) {
1339 ich_has_controls
= 1;
1343 if (ich_has_controls
)
1344 build_mixer_unit_ctl(state
, desc
, pin
, ich
,
1353 * Processing Unit / Extension Unit
1356 /* get callback for processing/extension unit */
1357 static int mixer_ctl_procunit_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1359 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1362 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &val
);
1363 if (err
< 0 && cval
->mixer
->ignore_ctl_error
) {
1364 ucontrol
->value
.integer
.value
[0] = cval
->min
;
1369 val
= get_relative_value(cval
, val
);
1370 ucontrol
->value
.integer
.value
[0] = val
;
1374 /* put callback for processing/extension unit */
1375 static int mixer_ctl_procunit_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1377 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1380 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &oval
);
1382 if (cval
->mixer
->ignore_ctl_error
)
1386 val
= ucontrol
->value
.integer
.value
[0];
1387 val
= get_abs_value(cval
, val
);
1389 set_cur_ctl_value(cval
, cval
->control
<< 8, val
);
1395 /* alsa control interface for processing/extension unit */
1396 static struct snd_kcontrol_new mixer_procunit_ctl
= {
1397 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1398 .name
= "", /* will be filled later */
1399 .info
= mixer_ctl_feature_info
,
1400 .get
= mixer_ctl_procunit_get
,
1401 .put
= mixer_ctl_procunit_put
,
1406 * predefined data for processing units
1408 struct procunit_value_info
{
1415 struct procunit_info
{
1418 struct procunit_value_info
*values
;
1421 static struct procunit_value_info updown_proc_info
[] = {
1422 { UAC_UD_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1423 { UAC_UD_MODE_SELECT
, "Mode Select", USB_MIXER_U8
, 1 },
1426 static struct procunit_value_info prologic_proc_info
[] = {
1427 { UAC_DP_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1428 { UAC_DP_MODE_SELECT
, "Mode Select", USB_MIXER_U8
, 1 },
1431 static struct procunit_value_info threed_enh_proc_info
[] = {
1432 { UAC_3D_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1433 { UAC_3D_SPACE
, "Spaciousness", USB_MIXER_U8
},
1436 static struct procunit_value_info reverb_proc_info
[] = {
1437 { UAC_REVERB_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1438 { UAC_REVERB_LEVEL
, "Level", USB_MIXER_U8
},
1439 { UAC_REVERB_TIME
, "Time", USB_MIXER_U16
},
1440 { UAC_REVERB_FEEDBACK
, "Feedback", USB_MIXER_U8
},
1443 static struct procunit_value_info chorus_proc_info
[] = {
1444 { UAC_CHORUS_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1445 { UAC_CHORUS_LEVEL
, "Level", USB_MIXER_U8
},
1446 { UAC_CHORUS_RATE
, "Rate", USB_MIXER_U16
},
1447 { UAC_CHORUS_DEPTH
, "Depth", USB_MIXER_U16
},
1450 static struct procunit_value_info dcr_proc_info
[] = {
1451 { UAC_DCR_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1452 { UAC_DCR_RATE
, "Ratio", USB_MIXER_U16
},
1453 { UAC_DCR_MAXAMPL
, "Max Amp", USB_MIXER_S16
},
1454 { UAC_DCR_THRESHOLD
, "Threshold", USB_MIXER_S16
},
1455 { UAC_DCR_ATTACK_TIME
, "Attack Time", USB_MIXER_U16
},
1456 { UAC_DCR_RELEASE_TIME
, "Release Time", USB_MIXER_U16
},
1460 static struct procunit_info procunits
[] = {
1461 { UAC_PROCESS_UP_DOWNMIX
, "Up Down", updown_proc_info
},
1462 { UAC_PROCESS_DOLBY_PROLOGIC
, "Dolby Prologic", prologic_proc_info
},
1463 { UAC_PROCESS_STEREO_EXTENDER
, "3D Stereo Extender", threed_enh_proc_info
},
1464 { UAC_PROCESS_REVERB
, "Reverb", reverb_proc_info
},
1465 { UAC_PROCESS_CHORUS
, "Chorus", chorus_proc_info
},
1466 { UAC_PROCESS_DYN_RANGE_COMP
, "DCR", dcr_proc_info
},
1470 * predefined data for extension units
1472 static struct procunit_value_info clock_rate_xu_info
[] = {
1473 { USB_XU_CLOCK_RATE_SELECTOR
, "Selector", USB_MIXER_U8
, 0 },
1476 static struct procunit_value_info clock_source_xu_info
[] = {
1477 { USB_XU_CLOCK_SOURCE_SELECTOR
, "External", USB_MIXER_BOOLEAN
},
1480 static struct procunit_value_info spdif_format_xu_info
[] = {
1481 { USB_XU_DIGITAL_FORMAT_SELECTOR
, "SPDIF/AC3", USB_MIXER_BOOLEAN
},
1484 static struct procunit_value_info soft_limit_xu_info
[] = {
1485 { USB_XU_SOFT_LIMIT_SELECTOR
, " ", USB_MIXER_BOOLEAN
},
1488 static struct procunit_info extunits
[] = {
1489 { USB_XU_CLOCK_RATE
, "Clock rate", clock_rate_xu_info
},
1490 { USB_XU_CLOCK_SOURCE
, "DigitalIn CLK source", clock_source_xu_info
},
1491 { USB_XU_DIGITAL_IO_STATUS
, "DigitalOut format:", spdif_format_xu_info
},
1492 { USB_XU_DEVICE_OPTIONS
, "AnalogueIn Soft Limit", soft_limit_xu_info
},
1496 * build a processing/extension unit
1498 static int build_audio_procunit(struct mixer_build
*state
, int unitid
, void *raw_desc
, struct procunit_info
*list
, char *name
)
1500 struct uac_processing_unit_descriptor
*desc
= raw_desc
;
1501 int num_ins
= desc
->bNrInPins
;
1502 struct usb_mixer_elem_info
*cval
;
1503 struct snd_kcontrol
*kctl
;
1504 int i
, err
, nameid
, type
, len
;
1505 struct procunit_info
*info
;
1506 struct procunit_value_info
*valinfo
;
1507 const struct usbmix_name_map
*map
;
1508 static struct procunit_value_info default_value_info
[] = {
1509 { 0x01, "Switch", USB_MIXER_BOOLEAN
},
1512 static struct procunit_info default_info
= {
1513 0, NULL
, default_value_info
1516 if (desc
->bLength
< 13 || desc
->bLength
< 13 + num_ins
||
1517 desc
->bLength
< num_ins
+ uac_processing_unit_bControlSize(desc
, state
->mixer
->protocol
)) {
1518 snd_printk(KERN_ERR
"invalid %s descriptor (id %d)\n", name
, unitid
);
1522 for (i
= 0; i
< num_ins
; i
++) {
1523 if ((err
= parse_audio_unit(state
, desc
->baSourceID
[i
])) < 0)
1527 type
= le16_to_cpu(desc
->wProcessType
);
1528 for (info
= list
; info
&& info
->type
; info
++)
1529 if (info
->type
== type
)
1531 if (! info
|| ! info
->type
)
1532 info
= &default_info
;
1534 for (valinfo
= info
->values
; valinfo
->control
; valinfo
++) {
1535 __u8
*controls
= uac_processing_unit_bmControls(desc
, state
->mixer
->protocol
);
1537 if (! (controls
[valinfo
->control
/ 8] & (1 << ((valinfo
->control
% 8) - 1))))
1539 map
= find_map(state
, unitid
, valinfo
->control
);
1540 if (check_ignored_ctl(map
))
1542 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1544 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1547 cval
->mixer
= state
->mixer
;
1549 cval
->control
= valinfo
->control
;
1550 cval
->val_type
= valinfo
->val_type
;
1553 /* get min/max values */
1554 if (type
== UAC_PROCESS_UP_DOWNMIX
&& cval
->control
== UAC_UD_MODE_SELECT
) {
1555 __u8
*control_spec
= uac_processing_unit_specific(desc
, state
->mixer
->protocol
);
1556 /* FIXME: hard-coded */
1558 cval
->max
= control_spec
[0];
1560 cval
->initialized
= 1;
1562 if (type
== USB_XU_CLOCK_RATE
) {
1563 /* E-Mu USB 0404/0202/TrackerPre
1564 * samplerate control quirk
1569 cval
->initialized
= 1;
1571 get_min_max(cval
, valinfo
->min_value
);
1574 kctl
= snd_ctl_new1(&mixer_procunit_ctl
, cval
);
1576 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1580 kctl
->private_free
= usb_mixer_elem_free
;
1582 if (check_mapped_name(map
, kctl
->id
.name
,
1583 sizeof(kctl
->id
.name
)))
1585 else if (info
->name
)
1586 strlcpy(kctl
->id
.name
, info
->name
, sizeof(kctl
->id
.name
));
1588 nameid
= uac_processing_unit_iProcessing(desc
, state
->mixer
->protocol
);
1591 len
= snd_usb_copy_string_desc(state
, nameid
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1593 strlcpy(kctl
->id
.name
, name
, sizeof(kctl
->id
.name
));
1595 append_ctl_name(kctl
, " ");
1596 append_ctl_name(kctl
, valinfo
->suffix
);
1598 snd_printdd(KERN_INFO
"[%d] PU [%s] ch = %d, val = %d/%d\n",
1599 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
);
1600 if ((err
= add_control_to_empty(state
, kctl
)) < 0)
1607 static int parse_audio_processing_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1609 return build_audio_procunit(state
, unitid
, raw_desc
, procunits
, "Processing Unit");
1612 static int parse_audio_extension_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1614 /* Note that we parse extension units with processing unit descriptors.
1615 * That's ok as the layout is the same */
1616 return build_audio_procunit(state
, unitid
, raw_desc
, extunits
, "Extension Unit");
1624 /* info callback for selector unit
1625 * use an enumerator type for routing
1627 static int mixer_ctl_selector_info(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_info
*uinfo
)
1629 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1630 char **itemlist
= (char **)kcontrol
->private_value
;
1632 if (snd_BUG_ON(!itemlist
))
1634 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1636 uinfo
->value
.enumerated
.items
= cval
->max
;
1637 if ((int)uinfo
->value
.enumerated
.item
>= cval
->max
)
1638 uinfo
->value
.enumerated
.item
= cval
->max
- 1;
1639 strcpy(uinfo
->value
.enumerated
.name
, itemlist
[uinfo
->value
.enumerated
.item
]);
1643 /* get callback for selector unit */
1644 static int mixer_ctl_selector_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1646 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1649 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &val
);
1651 if (cval
->mixer
->ignore_ctl_error
) {
1652 ucontrol
->value
.enumerated
.item
[0] = 0;
1657 val
= get_relative_value(cval
, val
);
1658 ucontrol
->value
.enumerated
.item
[0] = val
;
1662 /* put callback for selector unit */
1663 static int mixer_ctl_selector_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1665 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1668 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &oval
);
1670 if (cval
->mixer
->ignore_ctl_error
)
1674 val
= ucontrol
->value
.enumerated
.item
[0];
1675 val
= get_abs_value(cval
, val
);
1677 set_cur_ctl_value(cval
, cval
->control
<< 8, val
);
1683 /* alsa control interface for selector unit */
1684 static struct snd_kcontrol_new mixer_selectunit_ctl
= {
1685 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1686 .name
= "", /* will be filled later */
1687 .info
= mixer_ctl_selector_info
,
1688 .get
= mixer_ctl_selector_get
,
1689 .put
= mixer_ctl_selector_put
,
1693 /* private free callback.
1694 * free both private_data and private_value
1696 static void usb_mixer_selector_elem_free(struct snd_kcontrol
*kctl
)
1700 if (kctl
->private_data
) {
1701 struct usb_mixer_elem_info
*cval
= kctl
->private_data
;
1702 num_ins
= cval
->max
;
1704 kctl
->private_data
= NULL
;
1706 if (kctl
->private_value
) {
1707 char **itemlist
= (char **)kctl
->private_value
;
1708 for (i
= 0; i
< num_ins
; i
++)
1711 kctl
->private_value
= 0;
1716 * parse a selector unit
1718 static int parse_audio_selector_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1720 struct uac_selector_unit_descriptor
*desc
= raw_desc
;
1721 unsigned int i
, nameid
, len
;
1723 struct usb_mixer_elem_info
*cval
;
1724 struct snd_kcontrol
*kctl
;
1725 const struct usbmix_name_map
*map
;
1728 if (!desc
->bNrInPins
|| desc
->bLength
< 5 + desc
->bNrInPins
) {
1729 snd_printk(KERN_ERR
"invalid SELECTOR UNIT descriptor %d\n", unitid
);
1733 for (i
= 0; i
< desc
->bNrInPins
; i
++) {
1734 if ((err
= parse_audio_unit(state
, desc
->baSourceID
[i
])) < 0)
1738 if (desc
->bNrInPins
== 1) /* only one ? nonsense! */
1741 map
= find_map(state
, unitid
, 0);
1742 if (check_ignored_ctl(map
))
1745 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1747 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1750 cval
->mixer
= state
->mixer
;
1752 cval
->val_type
= USB_MIXER_U8
;
1755 cval
->max
= desc
->bNrInPins
;
1757 cval
->initialized
= 1;
1759 if (desc
->bDescriptorSubtype
== UAC2_CLOCK_SELECTOR
)
1760 cval
->control
= UAC2_CX_CLOCK_SELECTOR
;
1764 namelist
= kmalloc(sizeof(char *) * desc
->bNrInPins
, GFP_KERNEL
);
1766 snd_printk(KERN_ERR
"cannot malloc\n");
1770 #define MAX_ITEM_NAME_LEN 64
1771 for (i
= 0; i
< desc
->bNrInPins
; i
++) {
1772 struct usb_audio_term iterm
;
1774 namelist
[i
] = kmalloc(MAX_ITEM_NAME_LEN
, GFP_KERNEL
);
1775 if (! namelist
[i
]) {
1776 snd_printk(KERN_ERR
"cannot malloc\n");
1783 len
= check_mapped_selector_name(state
, unitid
, i
, namelist
[i
],
1785 if (! len
&& check_input_term(state
, desc
->baSourceID
[i
], &iterm
) >= 0)
1786 len
= get_term_name(state
, &iterm
, namelist
[i
], MAX_ITEM_NAME_LEN
, 0);
1788 sprintf(namelist
[i
], "Input %d", i
);
1791 kctl
= snd_ctl_new1(&mixer_selectunit_ctl
, cval
);
1793 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1798 kctl
->private_value
= (unsigned long)namelist
;
1799 kctl
->private_free
= usb_mixer_selector_elem_free
;
1801 nameid
= uac_selector_unit_iSelector(desc
);
1802 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1806 snd_usb_copy_string_desc(state
, nameid
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1808 len
= get_term_name(state
, &state
->oterm
,
1809 kctl
->id
.name
, sizeof(kctl
->id
.name
), 0);
1811 strlcpy(kctl
->id
.name
, "USB", sizeof(kctl
->id
.name
));
1813 if (desc
->bDescriptorSubtype
== UAC2_CLOCK_SELECTOR
)
1814 append_ctl_name(kctl
, " Clock Source");
1815 else if ((state
->oterm
.type
& 0xff00) == 0x0100)
1816 append_ctl_name(kctl
, " Capture Source");
1818 append_ctl_name(kctl
, " Playback Source");
1821 snd_printdd(KERN_INFO
"[%d] SU [%s] items = %d\n",
1822 cval
->id
, kctl
->id
.name
, desc
->bNrInPins
);
1823 if ((err
= add_control_to_empty(state
, kctl
)) < 0)
1831 * parse an audio unit recursively
1834 static int parse_audio_unit(struct mixer_build
*state
, int unitid
)
1838 if (test_and_set_bit(unitid
, state
->unitbitmap
))
1839 return 0; /* the unit already visited */
1841 p1
= find_audio_control_unit(state
, unitid
);
1843 snd_printk(KERN_ERR
"usbaudio: unit %d not found!\n", unitid
);
1848 case UAC_INPUT_TERMINAL
:
1849 case UAC2_CLOCK_SOURCE
:
1851 case UAC_MIXER_UNIT
:
1852 return parse_audio_mixer_unit(state
, unitid
, p1
);
1853 case UAC_SELECTOR_UNIT
:
1854 case UAC2_CLOCK_SELECTOR
:
1855 return parse_audio_selector_unit(state
, unitid
, p1
);
1856 case UAC_FEATURE_UNIT
:
1857 return parse_audio_feature_unit(state
, unitid
, p1
);
1858 case UAC_PROCESSING_UNIT_V1
:
1859 /* UAC2_EFFECT_UNIT has the same value */
1860 if (state
->mixer
->protocol
== UAC_VERSION_1
)
1861 return parse_audio_processing_unit(state
, unitid
, p1
);
1863 return 0; /* FIXME - effect units not implemented yet */
1864 case UAC_EXTENSION_UNIT_V1
:
1865 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1866 if (state
->mixer
->protocol
== UAC_VERSION_1
)
1867 return parse_audio_extension_unit(state
, unitid
, p1
);
1868 else /* UAC_VERSION_2 */
1869 return parse_audio_processing_unit(state
, unitid
, p1
);
1871 snd_printk(KERN_ERR
"usbaudio: unit %u: unexpected type 0x%02x\n", unitid
, p1
[2]);
1876 static void snd_usb_mixer_free(struct usb_mixer_interface
*mixer
)
1878 kfree(mixer
->id_elems
);
1880 kfree(mixer
->urb
->transfer_buffer
);
1881 usb_free_urb(mixer
->urb
);
1883 usb_free_urb(mixer
->rc_urb
);
1884 kfree(mixer
->rc_setup_packet
);
1888 static int snd_usb_mixer_dev_free(struct snd_device
*device
)
1890 struct usb_mixer_interface
*mixer
= device
->device_data
;
1891 snd_usb_mixer_free(mixer
);
1896 * create mixer controls
1898 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1900 static int snd_usb_mixer_controls(struct usb_mixer_interface
*mixer
)
1902 struct mixer_build state
;
1904 const struct usbmix_ctl_map
*map
;
1905 struct usb_host_interface
*hostif
;
1908 hostif
= &usb_ifnum_to_if(mixer
->chip
->dev
, mixer
->ctrlif
)->altsetting
[0];
1909 memset(&state
, 0, sizeof(state
));
1910 state
.chip
= mixer
->chip
;
1911 state
.mixer
= mixer
;
1912 state
.buffer
= hostif
->extra
;
1913 state
.buflen
= hostif
->extralen
;
1915 /* check the mapping table */
1916 for (map
= usbmix_ctl_maps
; map
->id
; map
++) {
1917 if (map
->id
== state
.chip
->usb_id
) {
1918 state
.map
= map
->map
;
1919 state
.selector_map
= map
->selector_map
;
1920 mixer
->ignore_ctl_error
= map
->ignore_ctl_error
;
1926 while ((p
= snd_usb_find_csint_desc(hostif
->extra
, hostif
->extralen
, p
, UAC_OUTPUT_TERMINAL
)) != NULL
) {
1927 if (mixer
->protocol
== UAC_VERSION_1
) {
1928 struct uac_output_terminal_descriptor_v1
*desc
= p
;
1930 if (desc
->bLength
< sizeof(*desc
))
1931 continue; /* invalid descriptor? */
1932 set_bit(desc
->bTerminalID
, state
.unitbitmap
); /* mark terminal ID as visited */
1933 state
.oterm
.id
= desc
->bTerminalID
;
1934 state
.oterm
.type
= le16_to_cpu(desc
->wTerminalType
);
1935 state
.oterm
.name
= desc
->iTerminal
;
1936 err
= parse_audio_unit(&state
, desc
->bSourceID
);
1939 } else { /* UAC_VERSION_2 */
1940 struct uac2_output_terminal_descriptor
*desc
= p
;
1942 if (desc
->bLength
< sizeof(*desc
))
1943 continue; /* invalid descriptor? */
1944 set_bit(desc
->bTerminalID
, state
.unitbitmap
); /* mark terminal ID as visited */
1945 state
.oterm
.id
= desc
->bTerminalID
;
1946 state
.oterm
.type
= le16_to_cpu(desc
->wTerminalType
);
1947 state
.oterm
.name
= desc
->iTerminal
;
1948 err
= parse_audio_unit(&state
, desc
->bSourceID
);
1952 /* for UAC2, use the same approach to also add the clock selectors */
1953 err
= parse_audio_unit(&state
, desc
->bCSourceID
);
1962 void snd_usb_mixer_notify_id(struct usb_mixer_interface
*mixer
, int unitid
)
1964 struct usb_mixer_elem_info
*info
;
1966 for (info
= mixer
->id_elems
[unitid
]; info
; info
= info
->next_id_elem
)
1967 snd_ctl_notify(mixer
->chip
->card
, SNDRV_CTL_EVENT_MASK_VALUE
,
1971 static void snd_usb_mixer_dump_cval(struct snd_info_buffer
*buffer
,
1973 struct usb_mixer_elem_info
*cval
)
1975 static char *val_types
[] = {"BOOLEAN", "INV_BOOLEAN",
1976 "S8", "U8", "S16", "U16"};
1977 snd_iprintf(buffer
, " Unit: %i\n", unitid
);
1979 snd_iprintf(buffer
, " Control: name=\"%s\", index=%i\n",
1980 cval
->elem_id
->name
, cval
->elem_id
->index
);
1981 snd_iprintf(buffer
, " Info: id=%i, control=%i, cmask=0x%x, "
1982 "channels=%i, type=\"%s\"\n", cval
->id
,
1983 cval
->control
, cval
->cmask
, cval
->channels
,
1984 val_types
[cval
->val_type
]);
1985 snd_iprintf(buffer
, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
1986 cval
->min
, cval
->max
, cval
->dBmin
, cval
->dBmax
);
1989 static void snd_usb_mixer_proc_read(struct snd_info_entry
*entry
,
1990 struct snd_info_buffer
*buffer
)
1992 struct snd_usb_audio
*chip
= entry
->private_data
;
1993 struct usb_mixer_interface
*mixer
;
1994 struct usb_mixer_elem_info
*cval
;
1997 list_for_each_entry(mixer
, &chip
->mixer_list
, list
) {
1999 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2000 chip
->usb_id
, mixer
->ctrlif
,
2001 mixer
->ignore_ctl_error
);
2002 snd_iprintf(buffer
, "Card: %s\n", chip
->card
->longname
);
2003 for (unitid
= 0; unitid
< MAX_ID_ELEMS
; unitid
++) {
2004 for (cval
= mixer
->id_elems
[unitid
]; cval
;
2005 cval
= cval
->next_id_elem
)
2006 snd_usb_mixer_dump_cval(buffer
, unitid
, cval
);
2011 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface
*mixer
,
2012 int attribute
, int value
, int index
)
2014 struct usb_mixer_elem_info
*info
;
2015 __u8 unitid
= (index
>> 8) & 0xff;
2016 __u8 control
= (value
>> 8) & 0xff;
2017 __u8 channel
= value
& 0xff;
2019 if (channel
>= MAX_CHANNELS
) {
2020 snd_printk(KERN_DEBUG
"%s(): bogus channel number %d\n",
2025 for (info
= mixer
->id_elems
[unitid
]; info
; info
= info
->next_id_elem
) {
2026 if (info
->control
!= control
)
2029 switch (attribute
) {
2031 /* invalidate cache, so the value is read from the device */
2033 info
->cached
&= ~(1 << channel
);
2034 else /* master channel */
2037 snd_ctl_notify(mixer
->chip
->card
, SNDRV_CTL_EVENT_MASK_VALUE
,
2050 snd_printk(KERN_DEBUG
"unknown attribute %d in interrupt\n",
2057 static void snd_usb_mixer_interrupt(struct urb
*urb
)
2059 struct usb_mixer_interface
*mixer
= urb
->context
;
2060 int len
= urb
->actual_length
;
2062 if (urb
->status
!= 0)
2065 if (mixer
->protocol
== UAC_VERSION_1
) {
2066 struct uac1_status_word
*status
;
2068 for (status
= urb
->transfer_buffer
;
2069 len
>= sizeof(*status
);
2070 len
-= sizeof(*status
), status
++) {
2071 snd_printd(KERN_DEBUG
"status interrupt: %02x %02x\n",
2072 status
->bStatusType
,
2073 status
->bOriginator
);
2075 /* ignore any notifications not from the control interface */
2076 if ((status
->bStatusType
& UAC1_STATUS_TYPE_ORIG_MASK
) !=
2077 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF
)
2080 if (status
->bStatusType
& UAC1_STATUS_TYPE_MEM_CHANGED
)
2081 snd_usb_mixer_rc_memory_change(mixer
, status
->bOriginator
);
2083 snd_usb_mixer_notify_id(mixer
, status
->bOriginator
);
2085 } else { /* UAC_VERSION_2 */
2086 struct uac2_interrupt_data_msg
*msg
;
2088 for (msg
= urb
->transfer_buffer
;
2089 len
>= sizeof(*msg
);
2090 len
-= sizeof(*msg
), msg
++) {
2091 /* drop vendor specific and endpoint requests */
2092 if ((msg
->bInfo
& UAC2_INTERRUPT_DATA_MSG_VENDOR
) ||
2093 (msg
->bInfo
& UAC2_INTERRUPT_DATA_MSG_EP
))
2096 snd_usb_mixer_interrupt_v2(mixer
, msg
->bAttribute
,
2097 le16_to_cpu(msg
->wValue
),
2098 le16_to_cpu(msg
->wIndex
));
2103 if (urb
->status
!= -ENOENT
&& urb
->status
!= -ECONNRESET
) {
2104 urb
->dev
= mixer
->chip
->dev
;
2105 usb_submit_urb(urb
, GFP_ATOMIC
);
2109 /* create the handler for the optional status interrupt endpoint */
2110 static int snd_usb_mixer_status_create(struct usb_mixer_interface
*mixer
)
2112 struct usb_host_interface
*hostif
;
2113 struct usb_endpoint_descriptor
*ep
;
2114 void *transfer_buffer
;
2118 hostif
= &usb_ifnum_to_if(mixer
->chip
->dev
, mixer
->ctrlif
)->altsetting
[0];
2119 /* we need one interrupt input endpoint */
2120 if (get_iface_desc(hostif
)->bNumEndpoints
< 1)
2122 ep
= get_endpoint(hostif
, 0);
2123 if (!usb_endpoint_dir_in(ep
) || !usb_endpoint_xfer_int(ep
))
2126 epnum
= usb_endpoint_num(ep
);
2127 buffer_length
= le16_to_cpu(ep
->wMaxPacketSize
);
2128 transfer_buffer
= kmalloc(buffer_length
, GFP_KERNEL
);
2129 if (!transfer_buffer
)
2131 mixer
->urb
= usb_alloc_urb(0, GFP_KERNEL
);
2133 kfree(transfer_buffer
);
2136 usb_fill_int_urb(mixer
->urb
, mixer
->chip
->dev
,
2137 usb_rcvintpipe(mixer
->chip
->dev
, epnum
),
2138 transfer_buffer
, buffer_length
,
2139 snd_usb_mixer_interrupt
, mixer
, ep
->bInterval
);
2140 usb_submit_urb(mixer
->urb
, GFP_KERNEL
);
2144 int snd_usb_create_mixer(struct snd_usb_audio
*chip
, int ctrlif
,
2147 static struct snd_device_ops dev_ops
= {
2148 .dev_free
= snd_usb_mixer_dev_free
2150 struct usb_mixer_interface
*mixer
;
2151 struct snd_info_entry
*entry
;
2152 struct usb_host_interface
*host_iface
;
2155 strcpy(chip
->card
->mixername
, "USB Mixer");
2157 mixer
= kzalloc(sizeof(*mixer
), GFP_KERNEL
);
2161 mixer
->ctrlif
= ctrlif
;
2162 mixer
->ignore_ctl_error
= ignore_error
;
2163 mixer
->id_elems
= kcalloc(MAX_ID_ELEMS
, sizeof(*mixer
->id_elems
),
2165 if (!mixer
->id_elems
) {
2170 host_iface
= &usb_ifnum_to_if(chip
->dev
, ctrlif
)->altsetting
[0];
2171 mixer
->protocol
= get_iface_desc(host_iface
)->bInterfaceProtocol
;
2173 if ((err
= snd_usb_mixer_controls(mixer
)) < 0 ||
2174 (err
= snd_usb_mixer_status_create(mixer
)) < 0)
2177 snd_usb_mixer_apply_create_quirk(mixer
);
2179 err
= snd_device_new(chip
->card
, SNDRV_DEV_LOWLEVEL
, mixer
, &dev_ops
);
2183 if (list_empty(&chip
->mixer_list
) &&
2184 !snd_card_proc_new(chip
->card
, "usbmixer", &entry
))
2185 snd_info_set_text_ops(entry
, chip
, snd_usb_mixer_proc_read
);
2187 list_add(&mixer
->list
, &chip
->mixer_list
);
2191 snd_usb_mixer_free(mixer
);
2195 void snd_usb_mixer_disconnect(struct list_head
*p
)
2197 struct usb_mixer_interface
*mixer
;
2199 mixer
= list_entry(p
, struct usb_mixer_interface
, list
);
2200 usb_kill_urb(mixer
->urb
);
2201 usb_kill_urb(mixer
->rc_urb
);