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
30 * TODOs, for both the mixer and the streaming interfaces:
32 * - support for UAC2 effect units
33 * - support for graphical equalizers
34 * - RANGE and MEM set commands (UAC2)
35 * - RANGE and MEM interrupt dispatchers (UAC2)
36 * - audio channel clustering (UAC2)
37 * - audio sample rate converter units (UAC2)
38 * - proper handling of clock multipliers (UAC2)
39 * - dispatch clock change notifications (UAC2)
40 * - stop PCM streams which use a clock that became invalid
41 * - stop PCM streams which use a clock selector that has changed
42 * - parse available sample rates again when clock sources changed
45 #include <linux/bitops.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/usb.h>
51 #include <linux/usb/audio.h>
52 #include <linux/usb/audio-v2.h>
54 #include <sound/core.h>
55 #include <sound/control.h>
56 #include <sound/hwdep.h>
57 #include <sound/info.h>
58 #include <sound/tlv.h>
63 #include "mixer_quirks.h"
66 #define MAX_ID_ELEMS 256
68 struct usb_audio_term
{
72 unsigned int chconfig
;
76 struct usbmix_name_map
;
79 struct snd_usb_audio
*chip
;
80 struct usb_mixer_interface
*mixer
;
81 unsigned char *buffer
;
83 DECLARE_BITMAP(unitbitmap
, MAX_ID_ELEMS
);
84 struct usb_audio_term oterm
;
85 const struct usbmix_name_map
*map
;
86 const struct usbmix_selector_map
*selector_map
;
89 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
91 USB_XU_CLOCK_RATE
= 0xe301,
92 USB_XU_CLOCK_SOURCE
= 0xe302,
93 USB_XU_DIGITAL_IO_STATUS
= 0xe303,
94 USB_XU_DEVICE_OPTIONS
= 0xe304,
95 USB_XU_DIRECT_MONITORING
= 0xe305,
96 USB_XU_METERING
= 0xe306
99 USB_XU_CLOCK_SOURCE_SELECTOR
= 0x02, /* clock source*/
100 USB_XU_CLOCK_RATE_SELECTOR
= 0x03, /* clock rate */
101 USB_XU_DIGITAL_FORMAT_SELECTOR
= 0x01, /* the spdif format */
102 USB_XU_SOFT_LIMIT_SELECTOR
= 0x03 /* soft limiter */
106 * manual mapping of mixer names
107 * if the mixer topology is too complicated and the parsed names are
108 * ambiguous, add the entries in usbmixer_maps.c.
110 #include "mixer_maps.c"
112 static const struct usbmix_name_map
*
113 find_map(struct mixer_build
*state
, int unitid
, int control
)
115 const struct usbmix_name_map
*p
= state
->map
;
120 for (p
= state
->map
; p
->id
; p
++) {
121 if (p
->id
== unitid
&&
122 (!control
|| !p
->control
|| control
== p
->control
))
128 /* get the mapped name if the unit matches */
130 check_mapped_name(const struct usbmix_name_map
*p
, char *buf
, int buflen
)
136 return strlcpy(buf
, p
->name
, buflen
);
139 /* check whether the control should be ignored */
141 check_ignored_ctl(const struct usbmix_name_map
*p
)
143 if (!p
|| p
->name
|| p
->dB
)
149 static inline void check_mapped_dB(const struct usbmix_name_map
*p
,
150 struct usb_mixer_elem_info
*cval
)
153 cval
->dBmin
= p
->dB
->min
;
154 cval
->dBmax
= p
->dB
->max
;
155 cval
->initialized
= 1;
159 /* get the mapped selector source name */
160 static int check_mapped_selector_name(struct mixer_build
*state
, int unitid
,
161 int index
, char *buf
, int buflen
)
163 const struct usbmix_selector_map
*p
;
165 if (! state
->selector_map
)
167 for (p
= state
->selector_map
; p
->id
; p
++) {
168 if (p
->id
== unitid
&& index
< p
->count
)
169 return strlcpy(buf
, p
->names
[index
], buflen
);
175 * find an audio control unit with the given unit id
177 static void *find_audio_control_unit(struct mixer_build
*state
, unsigned char unit
)
179 /* we just parse the header */
180 struct uac_feature_unit_descriptor
*hdr
= NULL
;
182 while ((hdr
= snd_usb_find_desc(state
->buffer
, state
->buflen
, hdr
,
183 USB_DT_CS_INTERFACE
)) != NULL
) {
184 if (hdr
->bLength
>= 4 &&
185 hdr
->bDescriptorSubtype
>= UAC_INPUT_TERMINAL
&&
186 hdr
->bDescriptorSubtype
<= UAC2_SAMPLE_RATE_CONVERTER
&&
187 hdr
->bUnitID
== unit
)
195 * copy a string with the given id
197 static int snd_usb_copy_string_desc(struct mixer_build
*state
, int index
, char *buf
, int maxlen
)
199 int len
= usb_string(state
->chip
->dev
, index
, buf
, maxlen
- 1);
205 * convert from the byte/word on usb descriptor to the zero-based integer
207 static int convert_signed_value(struct usb_mixer_elem_info
*cval
, int val
)
209 switch (cval
->val_type
) {
210 case USB_MIXER_BOOLEAN
:
212 case USB_MIXER_INV_BOOLEAN
:
235 * convert from the zero-based int to the byte/word for usb descriptor
237 static int convert_bytes_value(struct usb_mixer_elem_info
*cval
, int val
)
239 switch (cval
->val_type
) {
240 case USB_MIXER_BOOLEAN
:
242 case USB_MIXER_INV_BOOLEAN
:
251 return 0; /* not reached */
254 static int get_relative_value(struct usb_mixer_elem_info
*cval
, int val
)
260 else if (val
>= cval
->max
)
261 return (cval
->max
- cval
->min
+ cval
->res
- 1) / cval
->res
;
263 return (val
- cval
->min
) / cval
->res
;
266 static int get_abs_value(struct usb_mixer_elem_info
*cval
, int val
)
281 * retrieve a mixer value
284 static int get_ctl_value_v1(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
286 struct snd_usb_audio
*chip
= cval
->mixer
->chip
;
287 unsigned char buf
[2];
288 int val_len
= cval
->val_type
>= USB_MIXER_S16
? 2 : 1;
292 err
= snd_usb_autoresume(cval
->mixer
->chip
);
295 while (timeout
-- > 0) {
296 if (snd_usb_ctl_msg(chip
->dev
, usb_rcvctrlpipe(chip
->dev
, 0), request
,
297 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_IN
,
298 validx
, snd_usb_ctrl_intf(chip
) | (cval
->id
<< 8),
299 buf
, val_len
, 100) >= val_len
) {
300 *value_ret
= convert_signed_value(cval
, snd_usb_combine_bytes(buf
, val_len
));
301 snd_usb_autosuspend(cval
->mixer
->chip
);
305 snd_usb_autosuspend(cval
->mixer
->chip
);
306 snd_printdd(KERN_ERR
"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
307 request
, validx
, snd_usb_ctrl_intf(chip
) | (cval
->id
<< 8), cval
->val_type
);
311 static int get_ctl_value_v2(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
313 struct snd_usb_audio
*chip
= cval
->mixer
->chip
;
314 unsigned char buf
[2 + 3*sizeof(__u16
)]; /* enough space for one range */
319 if (request
== UAC_GET_CUR
) {
320 bRequest
= UAC2_CS_CUR
;
321 size
= sizeof(__u16
);
323 bRequest
= UAC2_CS_RANGE
;
327 memset(buf
, 0, sizeof(buf
));
329 ret
= snd_usb_autoresume(chip
) ? -EIO
: 0;
333 ret
= snd_usb_ctl_msg(chip
->dev
, usb_rcvctrlpipe(chip
->dev
, 0), bRequest
,
334 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_IN
,
335 validx
, snd_usb_ctrl_intf(chip
) | (cval
->id
<< 8),
337 snd_usb_autosuspend(chip
);
341 snd_printk(KERN_ERR
"cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
342 request
, validx
, snd_usb_ctrl_intf(chip
) | (cval
->id
<< 8), cval
->val_type
);
346 /* FIXME: how should we handle multiple triplets here? */
353 val
= buf
+ sizeof(__u16
);
356 val
= buf
+ sizeof(__u16
) * 2;
359 val
= buf
+ sizeof(__u16
) * 3;
365 *value_ret
= convert_signed_value(cval
, snd_usb_combine_bytes(val
, sizeof(__u16
)));
370 static int get_ctl_value(struct usb_mixer_elem_info
*cval
, int request
, int validx
, int *value_ret
)
372 return (cval
->mixer
->protocol
== UAC_VERSION_1
) ?
373 get_ctl_value_v1(cval
, request
, validx
, value_ret
) :
374 get_ctl_value_v2(cval
, request
, validx
, value_ret
);
377 static int get_cur_ctl_value(struct usb_mixer_elem_info
*cval
, int validx
, int *value
)
379 return get_ctl_value(cval
, UAC_GET_CUR
, validx
, value
);
382 /* channel = 0: master, 1 = first channel */
383 static inline int get_cur_mix_raw(struct usb_mixer_elem_info
*cval
,
384 int channel
, int *value
)
386 return get_ctl_value(cval
, UAC_GET_CUR
, (cval
->control
<< 8) | channel
, value
);
389 static int get_cur_mix_value(struct usb_mixer_elem_info
*cval
,
390 int channel
, int index
, int *value
)
394 if (cval
->cached
& (1 << channel
)) {
395 *value
= cval
->cache_val
[index
];
398 err
= get_cur_mix_raw(cval
, channel
, value
);
400 if (!cval
->mixer
->ignore_ctl_error
)
401 snd_printd(KERN_ERR
"cannot get current value for control %d ch %d: err = %d\n",
402 cval
->control
, channel
, err
);
405 cval
->cached
|= 1 << channel
;
406 cval
->cache_val
[index
] = *value
;
415 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info
*cval
,
416 int request
, int validx
, int value_set
)
418 struct snd_usb_audio
*chip
= cval
->mixer
->chip
;
419 unsigned char buf
[2];
420 int val_len
, err
, timeout
= 10;
422 if (cval
->mixer
->protocol
== UAC_VERSION_1
) {
423 val_len
= cval
->val_type
>= USB_MIXER_S16
? 2 : 1;
424 } else { /* UAC_VERSION_2 */
425 /* audio class v2 controls are always 2 bytes in size */
426 val_len
= sizeof(__u16
);
429 if (request
!= UAC_SET_CUR
) {
430 snd_printdd(KERN_WARNING
"RANGE setting not yet supported\n");
434 request
= UAC2_CS_CUR
;
437 value_set
= convert_bytes_value(cval
, value_set
);
438 buf
[0] = value_set
& 0xff;
439 buf
[1] = (value_set
>> 8) & 0xff;
440 err
= snd_usb_autoresume(chip
);
443 while (timeout
-- > 0)
444 if (snd_usb_ctl_msg(chip
->dev
,
445 usb_sndctrlpipe(chip
->dev
, 0), request
,
446 USB_RECIP_INTERFACE
| USB_TYPE_CLASS
| USB_DIR_OUT
,
447 validx
, snd_usb_ctrl_intf(chip
) | (cval
->id
<< 8),
448 buf
, val_len
, 100) >= 0) {
449 snd_usb_autosuspend(chip
);
452 snd_usb_autosuspend(chip
);
453 snd_printdd(KERN_ERR
"cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
454 request
, validx
, snd_usb_ctrl_intf(chip
) | (cval
->id
<< 8), cval
->val_type
, buf
[0], buf
[1]);
458 static int set_cur_ctl_value(struct usb_mixer_elem_info
*cval
, int validx
, int value
)
460 return snd_usb_mixer_set_ctl_value(cval
, UAC_SET_CUR
, validx
, value
);
463 static int set_cur_mix_value(struct usb_mixer_elem_info
*cval
, int channel
,
464 int index
, int value
)
467 unsigned int read_only
= (channel
== 0) ?
468 cval
->master_readonly
:
469 cval
->ch_readonly
& (1 << (channel
- 1));
472 snd_printdd(KERN_INFO
"%s(): channel %d of control %d is read_only\n",
473 __func__
, channel
, cval
->control
);
477 err
= snd_usb_mixer_set_ctl_value(cval
, UAC_SET_CUR
, (cval
->control
<< 8) | channel
,
481 cval
->cached
|= 1 << channel
;
482 cval
->cache_val
[index
] = value
;
487 * TLV callback for mixer volume controls
489 static int mixer_vol_tlv(struct snd_kcontrol
*kcontrol
, int op_flag
,
490 unsigned int size
, unsigned int __user
*_tlv
)
492 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
493 DECLARE_TLV_DB_MINMAX(scale
, 0, 0);
495 if (size
< sizeof(scale
))
497 scale
[2] = cval
->dBmin
;
498 scale
[3] = cval
->dBmax
;
499 if (copy_to_user(_tlv
, scale
, sizeof(scale
)))
505 * parser routines begin here...
508 static int parse_audio_unit(struct mixer_build
*state
, int unitid
);
512 * check if the input/output channel routing is enabled on the given bitmap.
513 * used for mixer unit parser
515 static int check_matrix_bitmap(unsigned char *bmap
, int ich
, int och
, int num_outs
)
517 int idx
= ich
* num_outs
+ och
;
518 return bmap
[idx
>> 3] & (0x80 >> (idx
& 7));
523 * add an alsa control element
524 * search and increment the index until an empty slot is found.
526 * if failed, give up and free the control instance.
529 int snd_usb_mixer_add_control(struct usb_mixer_interface
*mixer
,
530 struct snd_kcontrol
*kctl
)
532 struct usb_mixer_elem_info
*cval
= kctl
->private_data
;
535 while (snd_ctl_find_id(mixer
->chip
->card
, &kctl
->id
))
537 if ((err
= snd_ctl_add(mixer
->chip
->card
, kctl
)) < 0) {
538 snd_printd(KERN_ERR
"cannot add control (err = %d)\n", err
);
541 cval
->elem_id
= &kctl
->id
;
542 cval
->next_id_elem
= mixer
->id_elems
[cval
->id
];
543 mixer
->id_elems
[cval
->id
] = cval
;
549 * get a terminal name string
552 static struct iterm_name_combo
{
556 { 0x0300, "Output" },
557 { 0x0301, "Speaker" },
558 { 0x0302, "Headphone" },
559 { 0x0303, "HMD Audio" },
560 { 0x0304, "Desktop Speaker" },
561 { 0x0305, "Room Speaker" },
562 { 0x0306, "Com Speaker" },
564 { 0x0600, "External In" },
565 { 0x0601, "Analog In" },
566 { 0x0602, "Digital In" },
568 { 0x0604, "Legacy In" },
569 { 0x0605, "IEC958 In" },
570 { 0x0606, "1394 DA Stream" },
571 { 0x0607, "1394 DV Stream" },
572 { 0x0700, "Embedded" },
573 { 0x0701, "Noise Source" },
574 { 0x0702, "Equalization Noise" },
578 { 0x0706, "MiniDisk" },
579 { 0x0707, "Analog Tape" },
580 { 0x0708, "Phonograph" },
581 { 0x0709, "VCR Audio" },
582 { 0x070a, "Video Disk Audio" },
583 { 0x070b, "DVD Audio" },
584 { 0x070c, "TV Tuner Audio" },
585 { 0x070d, "Satellite Rec Audio" },
586 { 0x070e, "Cable Tuner Audio" },
587 { 0x070f, "DSS Audio" },
588 { 0x0710, "Radio Receiver" },
589 { 0x0711, "Radio Transmitter" },
590 { 0x0712, "Multi-Track Recorder" },
591 { 0x0713, "Synthesizer" },
595 static int get_term_name(struct mixer_build
*state
, struct usb_audio_term
*iterm
,
596 unsigned char *name
, int maxlen
, int term_only
)
598 struct iterm_name_combo
*names
;
601 return snd_usb_copy_string_desc(state
, iterm
->name
, name
, maxlen
);
603 /* virtual type - not a real terminal */
604 if (iterm
->type
>> 16) {
607 switch (iterm
->type
>> 16) {
608 case UAC_SELECTOR_UNIT
:
609 strcpy(name
, "Selector"); return 8;
610 case UAC1_PROCESSING_UNIT
:
611 strcpy(name
, "Process Unit"); return 12;
612 case UAC1_EXTENSION_UNIT
:
613 strcpy(name
, "Ext Unit"); return 8;
615 strcpy(name
, "Mixer"); return 5;
617 return sprintf(name
, "Unit %d", iterm
->id
);
621 switch (iterm
->type
& 0xff00) {
623 strcpy(name
, "PCM"); return 3;
625 strcpy(name
, "Mic"); return 3;
627 strcpy(name
, "Headset"); return 7;
629 strcpy(name
, "Phone"); return 5;
632 for (names
= iterm_names
; names
->type
; names
++)
633 if (names
->type
== iterm
->type
) {
634 strcpy(name
, names
->name
);
635 return strlen(names
->name
);
642 * parse the source unit recursively until it reaches to a terminal
643 * or a branched unit.
645 static int check_input_term(struct mixer_build
*state
, int id
, struct usb_audio_term
*term
)
650 memset(term
, 0, sizeof(*term
));
651 while ((p1
= find_audio_control_unit(state
, id
)) != NULL
) {
652 unsigned char *hdr
= p1
;
655 case UAC_INPUT_TERMINAL
:
656 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
657 struct uac_input_terminal_descriptor
*d
= p1
;
658 term
->type
= le16_to_cpu(d
->wTerminalType
);
659 term
->channels
= d
->bNrChannels
;
660 term
->chconfig
= le16_to_cpu(d
->wChannelConfig
);
661 term
->name
= d
->iTerminal
;
662 } else { /* UAC_VERSION_2 */
663 struct uac2_input_terminal_descriptor
*d
= p1
;
664 term
->type
= le16_to_cpu(d
->wTerminalType
);
665 term
->channels
= d
->bNrChannels
;
666 term
->chconfig
= le32_to_cpu(d
->bmChannelConfig
);
667 term
->name
= d
->iTerminal
;
669 /* call recursively to get the clock selectors */
670 err
= check_input_term(state
, d
->bCSourceID
, term
);
675 case UAC_FEATURE_UNIT
: {
676 /* the header is the same for v1 and v2 */
677 struct uac_feature_unit_descriptor
*d
= p1
;
679 break; /* continue to parse */
681 case UAC_MIXER_UNIT
: {
682 struct uac_mixer_unit_descriptor
*d
= p1
;
683 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
684 term
->channels
= uac_mixer_unit_bNrChannels(d
);
685 term
->chconfig
= uac_mixer_unit_wChannelConfig(d
, state
->mixer
->protocol
);
686 term
->name
= uac_mixer_unit_iMixer(d
);
689 case UAC_SELECTOR_UNIT
:
690 case UAC2_CLOCK_SELECTOR
: {
691 struct uac_selector_unit_descriptor
*d
= p1
;
692 /* call recursively to retrieve the channel info */
693 if (check_input_term(state
, d
->baSourceID
[0], term
) < 0)
695 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
697 term
->name
= uac_selector_unit_iSelector(d
);
700 case UAC1_PROCESSING_UNIT
:
701 case UAC1_EXTENSION_UNIT
: {
702 struct uac_processing_unit_descriptor
*d
= p1
;
704 id
= d
->baSourceID
[0];
705 break; /* continue to parse */
707 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
708 term
->channels
= uac_processing_unit_bNrChannels(d
);
709 term
->chconfig
= uac_processing_unit_wChannelConfig(d
, state
->mixer
->protocol
);
710 term
->name
= uac_processing_unit_iProcessing(d
, state
->mixer
->protocol
);
713 case UAC2_CLOCK_SOURCE
: {
714 struct uac_clock_source_descriptor
*d
= p1
;
715 term
->type
= d
->bDescriptorSubtype
<< 16; /* virtual type */
717 term
->name
= d
->iClockSource
;
732 /* feature unit control information */
733 struct usb_feature_control_info
{
735 unsigned int type
; /* control type (mute, volume, etc.) */
738 static struct usb_feature_control_info audio_feature_info
[] = {
739 { "Mute", USB_MIXER_INV_BOOLEAN
},
740 { "Volume", USB_MIXER_S16
},
741 { "Tone Control - Bass", USB_MIXER_S8
},
742 { "Tone Control - Mid", USB_MIXER_S8
},
743 { "Tone Control - Treble", USB_MIXER_S8
},
744 { "Graphic Equalizer", USB_MIXER_S8
}, /* FIXME: not implemeted yet */
745 { "Auto Gain Control", USB_MIXER_BOOLEAN
},
746 { "Delay Control", USB_MIXER_U16
},
747 { "Bass Boost", USB_MIXER_BOOLEAN
},
748 { "Loudness", USB_MIXER_BOOLEAN
},
750 { "Input Gain Control", USB_MIXER_U16
},
751 { "Input Gain Pad Control", USB_MIXER_BOOLEAN
},
752 { "Phase Inverter Control", USB_MIXER_BOOLEAN
},
756 /* private_free callback */
757 static void usb_mixer_elem_free(struct snd_kcontrol
*kctl
)
759 kfree(kctl
->private_data
);
760 kctl
->private_data
= NULL
;
765 * interface to ALSA control for feature/mixer units
768 /* volume control quirks */
769 static void volume_control_quirks(struct usb_mixer_elem_info
*cval
,
770 struct snd_kcontrol
*kctl
)
772 switch (cval
->mixer
->chip
->usb_id
) {
773 case USB_ID(0x0471, 0x0101):
774 case USB_ID(0x0471, 0x0104):
775 case USB_ID(0x0471, 0x0105):
776 case USB_ID(0x0672, 0x1041):
777 /* quirk for UDA1321/N101.
778 * note that detection between firmware 2.1.1.7 (N101)
779 * and later 2.1.1.21 is not very clear from datasheets.
780 * I hope that the min value is -15360 for newer firmware --jk
782 if (!strcmp(kctl
->id
.name
, "PCM Playback Volume") &&
783 cval
->min
== -15616) {
785 "set volume quirk for UDA1321/N101 chip\n");
790 case USB_ID(0x046d, 0x09a4):
791 if (!strcmp(kctl
->id
.name
, "Mic Capture Volume")) {
793 "set volume quirk for QuickCam E3500\n");
800 case USB_ID(0x046d, 0x0808):
801 case USB_ID(0x046d, 0x0809):
802 case USB_ID(0x046d, 0x0991):
803 /* Most audio usb devices lie about volume resolution.
804 * Most Logitech webcams have res = 384.
805 * Proboly there is some logitech magic behind this number --fishor
807 if (!strcmp(kctl
->id
.name
, "Mic Capture Volume")) {
809 "set resolution quirk: cval->res = 384\n");
818 * retrieve the minimum and maximum values for the specified control
820 static int get_min_max_with_quirks(struct usb_mixer_elem_info
*cval
,
821 int default_min
, struct snd_kcontrol
*kctl
)
824 cval
->min
= default_min
;
825 cval
->max
= cval
->min
+ 1;
827 cval
->dBmin
= cval
->dBmax
= 0;
829 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
830 cval
->val_type
== USB_MIXER_INV_BOOLEAN
) {
831 cval
->initialized
= 1;
836 for (i
= 0; i
< MAX_CHANNELS
; i
++)
837 if (cval
->cmask
& (1 << i
)) {
842 if (get_ctl_value(cval
, UAC_GET_MAX
, (cval
->control
<< 8) | minchn
, &cval
->max
) < 0 ||
843 get_ctl_value(cval
, UAC_GET_MIN
, (cval
->control
<< 8) | minchn
, &cval
->min
) < 0) {
844 snd_printd(KERN_ERR
"%d:%d: cannot get min/max values for control %d (id %d)\n",
845 cval
->id
, snd_usb_ctrl_intf(cval
->mixer
->chip
), cval
->control
, cval
->id
);
848 if (get_ctl_value(cval
, UAC_GET_RES
, (cval
->control
<< 8) | minchn
, &cval
->res
) < 0) {
851 int last_valid_res
= cval
->res
;
853 while (cval
->res
> 1) {
854 if (snd_usb_mixer_set_ctl_value(cval
, UAC_SET_RES
,
855 (cval
->control
<< 8) | minchn
, cval
->res
/ 2) < 0)
859 if (get_ctl_value(cval
, UAC_GET_RES
, (cval
->control
<< 8) | minchn
, &cval
->res
) < 0)
860 cval
->res
= last_valid_res
;
865 /* Additional checks for the proper resolution
867 * Some devices report smaller resolutions than actually
868 * reacting. They don't return errors but simply clip
869 * to the lower aligned value.
871 if (cval
->min
+ cval
->res
< cval
->max
) {
872 int last_valid_res
= cval
->res
;
873 int saved
, test
, check
;
874 get_cur_mix_raw(cval
, minchn
, &saved
);
877 if (test
< cval
->max
)
881 if (test
< cval
->min
|| test
> cval
->max
||
882 set_cur_mix_value(cval
, minchn
, 0, test
) ||
883 get_cur_mix_raw(cval
, minchn
, &check
)) {
884 cval
->res
= last_valid_res
;
891 set_cur_mix_value(cval
, minchn
, 0, saved
);
894 cval
->initialized
= 1;
898 volume_control_quirks(cval
, kctl
);
900 /* USB descriptions contain the dB scale in 1/256 dB unit
901 * while ALSA TLV contains in 1/100 dB unit
903 cval
->dBmin
= (convert_signed_value(cval
, cval
->min
) * 100) / 256;
904 cval
->dBmax
= (convert_signed_value(cval
, cval
->max
) * 100) / 256;
905 if (cval
->dBmin
> cval
->dBmax
) {
906 /* something is wrong; assume it's either from/to 0dB */
909 else if (cval
->dBmin
> 0)
911 if (cval
->dBmin
> cval
->dBmax
) {
912 /* totally crap, return an error */
920 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
922 /* get a feature/mixer unit info */
923 static int mixer_ctl_feature_info(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_info
*uinfo
)
925 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
927 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
928 cval
->val_type
== USB_MIXER_INV_BOOLEAN
)
929 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
931 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
932 uinfo
->count
= cval
->channels
;
933 if (cval
->val_type
== USB_MIXER_BOOLEAN
||
934 cval
->val_type
== USB_MIXER_INV_BOOLEAN
) {
935 uinfo
->value
.integer
.min
= 0;
936 uinfo
->value
.integer
.max
= 1;
938 if (!cval
->initialized
) {
939 get_min_max_with_quirks(cval
, 0, kcontrol
);
940 if (cval
->initialized
&& cval
->dBmin
>= cval
->dBmax
) {
941 kcontrol
->vd
[0].access
&=
942 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ
|
943 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK
);
944 snd_ctl_notify(cval
->mixer
->chip
->card
,
945 SNDRV_CTL_EVENT_MASK_INFO
,
949 uinfo
->value
.integer
.min
= 0;
950 uinfo
->value
.integer
.max
=
951 (cval
->max
- cval
->min
+ cval
->res
- 1) / cval
->res
;
956 /* get the current value from feature/mixer unit */
957 static int mixer_ctl_feature_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
959 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
960 int c
, cnt
, val
, err
;
962 ucontrol
->value
.integer
.value
[0] = cval
->min
;
965 for (c
= 0; c
< MAX_CHANNELS
; c
++) {
966 if (!(cval
->cmask
& (1 << c
)))
968 err
= get_cur_mix_value(cval
, c
+ 1, cnt
, &val
);
970 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
971 val
= get_relative_value(cval
, val
);
972 ucontrol
->value
.integer
.value
[cnt
] = val
;
978 err
= get_cur_mix_value(cval
, 0, 0, &val
);
980 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
981 val
= get_relative_value(cval
, val
);
982 ucontrol
->value
.integer
.value
[0] = val
;
987 /* put the current value to feature/mixer unit */
988 static int mixer_ctl_feature_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
990 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
991 int c
, cnt
, val
, oval
, err
;
996 for (c
= 0; c
< MAX_CHANNELS
; c
++) {
997 if (!(cval
->cmask
& (1 << c
)))
999 err
= get_cur_mix_value(cval
, c
+ 1, cnt
, &oval
);
1001 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
1002 val
= ucontrol
->value
.integer
.value
[cnt
];
1003 val
= get_abs_value(cval
, val
);
1005 set_cur_mix_value(cval
, c
+ 1, cnt
, val
);
1011 /* master channel */
1012 err
= get_cur_mix_value(cval
, 0, 0, &oval
);
1014 return cval
->mixer
->ignore_ctl_error
? 0 : err
;
1015 val
= ucontrol
->value
.integer
.value
[0];
1016 val
= get_abs_value(cval
, val
);
1018 set_cur_mix_value(cval
, 0, 0, val
);
1025 static struct snd_kcontrol_new usb_feature_unit_ctl
= {
1026 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1027 .name
= "", /* will be filled later manually */
1028 .info
= mixer_ctl_feature_info
,
1029 .get
= mixer_ctl_feature_get
,
1030 .put
= mixer_ctl_feature_put
,
1033 /* the read-only variant */
1034 static struct snd_kcontrol_new usb_feature_unit_ctl_ro
= {
1035 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1036 .name
= "", /* will be filled later manually */
1037 .info
= mixer_ctl_feature_info
,
1038 .get
= mixer_ctl_feature_get
,
1042 /* This symbol is exported in order to allow the mixer quirks to
1043 * hook up to the standard feature unit control mechanism */
1044 struct snd_kcontrol_new
*snd_usb_feature_unit_ctl
= &usb_feature_unit_ctl
;
1047 * build a feature control
1050 static size_t append_ctl_name(struct snd_kcontrol
*kctl
, const char *str
)
1052 return strlcat(kctl
->id
.name
, str
, sizeof(kctl
->id
.name
));
1055 static void build_feature_ctl(struct mixer_build
*state
, void *raw_desc
,
1056 unsigned int ctl_mask
, int control
,
1057 struct usb_audio_term
*iterm
, int unitid
,
1060 struct uac_feature_unit_descriptor
*desc
= raw_desc
;
1061 unsigned int len
= 0;
1062 int mapped_name
= 0;
1063 int nameid
= uac_feature_unit_iFeature(desc
);
1064 struct snd_kcontrol
*kctl
;
1065 struct usb_mixer_elem_info
*cval
;
1066 const struct usbmix_name_map
*map
;
1069 control
++; /* change from zero-based to 1-based value */
1071 if (control
== UAC_FU_GRAPHIC_EQUALIZER
) {
1072 /* FIXME: not supported yet */
1076 map
= find_map(state
, unitid
, control
);
1077 if (check_ignored_ctl(map
))
1080 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1082 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1085 cval
->mixer
= state
->mixer
;
1087 cval
->control
= control
;
1088 cval
->cmask
= ctl_mask
;
1089 cval
->val_type
= audio_feature_info
[control
-1].type
;
1090 if (ctl_mask
== 0) {
1091 cval
->channels
= 1; /* master channel */
1092 cval
->master_readonly
= readonly_mask
;
1095 for (i
= 0; i
< 16; i
++)
1096 if (ctl_mask
& (1 << i
))
1099 cval
->ch_readonly
= readonly_mask
;
1102 /* if all channels in the mask are marked read-only, make the control
1103 * read-only. set_cur_mix_value() will check the mask again and won't
1104 * issue write commands to read-only channels. */
1105 if (cval
->channels
== readonly_mask
)
1106 kctl
= snd_ctl_new1(&usb_feature_unit_ctl_ro
, cval
);
1108 kctl
= snd_ctl_new1(&usb_feature_unit_ctl
, cval
);
1111 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1115 kctl
->private_free
= usb_mixer_elem_free
;
1117 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1118 mapped_name
= len
!= 0;
1119 if (! len
&& nameid
)
1120 len
= snd_usb_copy_string_desc(state
, nameid
,
1121 kctl
->id
.name
, sizeof(kctl
->id
.name
));
1123 /* get min/max values */
1124 get_min_max_with_quirks(cval
, 0, kctl
);
1129 /* determine the control name. the rule is:
1130 * - if a name id is given in descriptor, use it.
1131 * - if the connected input can be determined, then use the name
1133 * - if the connected output can be determined, use it.
1134 * - otherwise, anonymous name.
1137 len
= get_term_name(state
, iterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 1);
1139 len
= get_term_name(state
, &state
->oterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 1);
1141 len
= snprintf(kctl
->id
.name
, sizeof(kctl
->id
.name
),
1142 "Feature %d", unitid
);
1144 /* determine the stream direction:
1145 * if the connected output is USB stream, then it's likely a
1146 * capture stream. otherwise it should be playback (hopefully :)
1148 if (! mapped_name
&& ! (state
->oterm
.type
>> 16)) {
1149 if ((state
->oterm
.type
& 0xff00) == 0x0100) {
1150 len
= append_ctl_name(kctl
, " Capture");
1152 len
= append_ctl_name(kctl
, " Playback");
1155 append_ctl_name(kctl
, control
== UAC_FU_MUTE
?
1156 " Switch" : " Volume");
1157 if (control
== UAC_FU_VOLUME
) {
1158 check_mapped_dB(map
, cval
);
1159 if (cval
->dBmin
< cval
->dBmax
|| !cval
->initialized
) {
1160 kctl
->tlv
.c
= mixer_vol_tlv
;
1161 kctl
->vd
[0].access
|=
1162 SNDRV_CTL_ELEM_ACCESS_TLV_READ
|
1163 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK
;
1170 strlcpy(kctl
->id
.name
, audio_feature_info
[control
-1].name
,
1171 sizeof(kctl
->id
.name
));
1175 range
= (cval
->max
- cval
->min
) / cval
->res
;
1176 /* Are there devices with volume range more than 255? I use a bit more
1177 * to be sure. 384 is a resolution magic number found on Logitech
1178 * devices. It will definitively catch all buggy Logitech devices.
1181 snd_printk(KERN_WARNING
"usb_audio: Warning! Unlikely big "
1182 "volume range (=%u), cval->res is probably wrong.",
1184 snd_printk(KERN_WARNING
"usb_audio: [%d] FU [%s] ch = %d, "
1185 "val = %d/%d/%d", cval
->id
,
1186 kctl
->id
.name
, cval
->channels
,
1187 cval
->min
, cval
->max
, cval
->res
);
1190 snd_printdd(KERN_INFO
"[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1191 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
, cval
->res
);
1192 snd_usb_mixer_add_control(state
->mixer
, kctl
);
1198 * parse a feature unit
1200 * most of controls are defined here.
1202 static int parse_audio_feature_unit(struct mixer_build
*state
, int unitid
, void *_ftr
)
1205 struct usb_audio_term iterm
;
1206 unsigned int master_bits
, first_ch_bits
;
1208 struct uac_feature_unit_descriptor
*hdr
= _ftr
;
1211 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
1212 csize
= hdr
->bControlSize
;
1214 snd_printdd(KERN_ERR
"usbaudio: unit %u: "
1215 "invalid bControlSize == 0\n", unitid
);
1218 channels
= (hdr
->bLength
- 7) / csize
- 1;
1219 bmaControls
= hdr
->bmaControls
;
1221 struct uac2_feature_unit_descriptor
*ftr
= _ftr
;
1223 channels
= (hdr
->bLength
- 6) / 4 - 1;
1224 bmaControls
= ftr
->bmaControls
;
1227 if (hdr
->bLength
< 7 || !csize
|| hdr
->bLength
< 7 + csize
) {
1228 snd_printk(KERN_ERR
"usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid
);
1232 /* parse the source unit */
1233 if ((err
= parse_audio_unit(state
, hdr
->bSourceID
)) < 0)
1236 /* determine the input source type and name */
1237 if (check_input_term(state
, hdr
->bSourceID
, &iterm
) < 0)
1240 master_bits
= snd_usb_combine_bytes(bmaControls
, csize
);
1241 /* master configuration quirks */
1242 switch (state
->chip
->usb_id
) {
1243 case USB_ID(0x08bb, 0x2702):
1244 snd_printk(KERN_INFO
1245 "usbmixer: master volume quirk for PCM2702 chip\n");
1246 /* disable non-functional volume control */
1247 master_bits
&= ~UAC_CONTROL_BIT(UAC_FU_VOLUME
);
1251 first_ch_bits
= snd_usb_combine_bytes(bmaControls
+ csize
, csize
);
1255 if (state
->mixer
->protocol
== UAC_VERSION_1
) {
1256 /* check all control types */
1257 for (i
= 0; i
< 10; i
++) {
1258 unsigned int ch_bits
= 0;
1259 for (j
= 0; j
< channels
; j
++) {
1260 unsigned int mask
= snd_usb_combine_bytes(bmaControls
+ csize
* (j
+1), csize
);
1261 if (mask
& (1 << i
))
1262 ch_bits
|= (1 << j
);
1264 /* audio class v1 controls are never read-only */
1265 if (ch_bits
& 1) /* the first channel must be set (for ease of programming) */
1266 build_feature_ctl(state
, _ftr
, ch_bits
, i
, &iterm
, unitid
, 0);
1267 if (master_bits
& (1 << i
))
1268 build_feature_ctl(state
, _ftr
, 0, i
, &iterm
, unitid
, 0);
1270 } else { /* UAC_VERSION_2 */
1271 for (i
= 0; i
< 30/2; i
++) {
1272 unsigned int ch_bits
= 0;
1273 unsigned int ch_read_only
= 0;
1275 for (j
= 0; j
< channels
; j
++) {
1276 unsigned int mask
= snd_usb_combine_bytes(bmaControls
+ csize
* (j
+1), csize
);
1277 if (uac2_control_is_readable(mask
, i
)) {
1278 ch_bits
|= (1 << j
);
1279 if (!uac2_control_is_writeable(mask
, i
))
1280 ch_read_only
|= (1 << j
);
1284 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1285 * are marked read-only in the descriptors. Otherwise, the control will be
1286 * reported as writeable, but the driver will not actually issue a write
1287 * command for read-only channels */
1288 if (ch_bits
& 1) /* the first channel must be set (for ease of programming) */
1289 build_feature_ctl(state
, _ftr
, ch_bits
, i
, &iterm
, unitid
, ch_read_only
);
1290 if (uac2_control_is_readable(master_bits
, i
))
1291 build_feature_ctl(state
, _ftr
, 0, i
, &iterm
, unitid
,
1292 !uac2_control_is_writeable(master_bits
, i
));
1305 * build a mixer unit control
1307 * the callbacks are identical with feature unit.
1308 * input channel number (zero based) is given in control field instead.
1311 static void build_mixer_unit_ctl(struct mixer_build
*state
,
1312 struct uac_mixer_unit_descriptor
*desc
,
1313 int in_pin
, int in_ch
, int unitid
,
1314 struct usb_audio_term
*iterm
)
1316 struct usb_mixer_elem_info
*cval
;
1317 unsigned int num_outs
= uac_mixer_unit_bNrChannels(desc
);
1318 unsigned int i
, len
;
1319 struct snd_kcontrol
*kctl
;
1320 const struct usbmix_name_map
*map
;
1322 map
= find_map(state
, unitid
, 0);
1323 if (check_ignored_ctl(map
))
1326 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1330 cval
->mixer
= state
->mixer
;
1332 cval
->control
= in_ch
+ 1; /* based on 1 */
1333 cval
->val_type
= USB_MIXER_S16
;
1334 for (i
= 0; i
< num_outs
; i
++) {
1335 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc
, state
->mixer
->protocol
), in_ch
, i
, num_outs
)) {
1336 cval
->cmask
|= (1 << i
);
1341 /* get min/max values */
1342 get_min_max(cval
, 0);
1344 kctl
= snd_ctl_new1(&usb_feature_unit_ctl
, cval
);
1346 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1350 kctl
->private_free
= usb_mixer_elem_free
;
1352 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1354 len
= get_term_name(state
, iterm
, kctl
->id
.name
, sizeof(kctl
->id
.name
), 0);
1356 len
= sprintf(kctl
->id
.name
, "Mixer Source %d", in_ch
+ 1);
1357 append_ctl_name(kctl
, " Volume");
1359 snd_printdd(KERN_INFO
"[%d] MU [%s] ch = %d, val = %d/%d\n",
1360 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
);
1361 snd_usb_mixer_add_control(state
->mixer
, kctl
);
1366 * parse a mixer unit
1368 static int parse_audio_mixer_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1370 struct uac_mixer_unit_descriptor
*desc
= raw_desc
;
1371 struct usb_audio_term iterm
;
1372 int input_pins
, num_ins
, num_outs
;
1375 if (desc
->bLength
< 11 || ! (input_pins
= desc
->bNrInPins
) || ! (num_outs
= uac_mixer_unit_bNrChannels(desc
))) {
1376 snd_printk(KERN_ERR
"invalid MIXER UNIT descriptor %d\n", unitid
);
1379 /* no bmControls field (e.g. Maya44) -> ignore */
1380 if (desc
->bLength
<= 10 + input_pins
) {
1381 snd_printdd(KERN_INFO
"MU %d has no bmControls field\n", unitid
);
1387 for (pin
= 0; pin
< input_pins
; pin
++) {
1388 err
= parse_audio_unit(state
, desc
->baSourceID
[pin
]);
1391 err
= check_input_term(state
, desc
->baSourceID
[pin
], &iterm
);
1394 num_ins
+= iterm
.channels
;
1395 for (; ich
< num_ins
; ++ich
) {
1396 int och
, ich_has_controls
= 0;
1398 for (och
= 0; och
< num_outs
; ++och
) {
1399 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc
, state
->mixer
->protocol
),
1400 ich
, och
, num_outs
)) {
1401 ich_has_controls
= 1;
1405 if (ich_has_controls
)
1406 build_mixer_unit_ctl(state
, desc
, pin
, ich
,
1415 * Processing Unit / Extension Unit
1418 /* get callback for processing/extension unit */
1419 static int mixer_ctl_procunit_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1421 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1424 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &val
);
1425 if (err
< 0 && cval
->mixer
->ignore_ctl_error
) {
1426 ucontrol
->value
.integer
.value
[0] = cval
->min
;
1431 val
= get_relative_value(cval
, val
);
1432 ucontrol
->value
.integer
.value
[0] = val
;
1436 /* put callback for processing/extension unit */
1437 static int mixer_ctl_procunit_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1439 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1442 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &oval
);
1444 if (cval
->mixer
->ignore_ctl_error
)
1448 val
= ucontrol
->value
.integer
.value
[0];
1449 val
= get_abs_value(cval
, val
);
1451 set_cur_ctl_value(cval
, cval
->control
<< 8, val
);
1457 /* alsa control interface for processing/extension unit */
1458 static struct snd_kcontrol_new mixer_procunit_ctl
= {
1459 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1460 .name
= "", /* will be filled later */
1461 .info
= mixer_ctl_feature_info
,
1462 .get
= mixer_ctl_procunit_get
,
1463 .put
= mixer_ctl_procunit_put
,
1468 * predefined data for processing units
1470 struct procunit_value_info
{
1477 struct procunit_info
{
1480 struct procunit_value_info
*values
;
1483 static struct procunit_value_info updown_proc_info
[] = {
1484 { UAC_UD_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1485 { UAC_UD_MODE_SELECT
, "Mode Select", USB_MIXER_U8
, 1 },
1488 static struct procunit_value_info prologic_proc_info
[] = {
1489 { UAC_DP_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1490 { UAC_DP_MODE_SELECT
, "Mode Select", USB_MIXER_U8
, 1 },
1493 static struct procunit_value_info threed_enh_proc_info
[] = {
1494 { UAC_3D_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1495 { UAC_3D_SPACE
, "Spaciousness", USB_MIXER_U8
},
1498 static struct procunit_value_info reverb_proc_info
[] = {
1499 { UAC_REVERB_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1500 { UAC_REVERB_LEVEL
, "Level", USB_MIXER_U8
},
1501 { UAC_REVERB_TIME
, "Time", USB_MIXER_U16
},
1502 { UAC_REVERB_FEEDBACK
, "Feedback", USB_MIXER_U8
},
1505 static struct procunit_value_info chorus_proc_info
[] = {
1506 { UAC_CHORUS_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1507 { UAC_CHORUS_LEVEL
, "Level", USB_MIXER_U8
},
1508 { UAC_CHORUS_RATE
, "Rate", USB_MIXER_U16
},
1509 { UAC_CHORUS_DEPTH
, "Depth", USB_MIXER_U16
},
1512 static struct procunit_value_info dcr_proc_info
[] = {
1513 { UAC_DCR_ENABLE
, "Switch", USB_MIXER_BOOLEAN
},
1514 { UAC_DCR_RATE
, "Ratio", USB_MIXER_U16
},
1515 { UAC_DCR_MAXAMPL
, "Max Amp", USB_MIXER_S16
},
1516 { UAC_DCR_THRESHOLD
, "Threshold", USB_MIXER_S16
},
1517 { UAC_DCR_ATTACK_TIME
, "Attack Time", USB_MIXER_U16
},
1518 { UAC_DCR_RELEASE_TIME
, "Release Time", USB_MIXER_U16
},
1522 static struct procunit_info procunits
[] = {
1523 { UAC_PROCESS_UP_DOWNMIX
, "Up Down", updown_proc_info
},
1524 { UAC_PROCESS_DOLBY_PROLOGIC
, "Dolby Prologic", prologic_proc_info
},
1525 { UAC_PROCESS_STEREO_EXTENDER
, "3D Stereo Extender", threed_enh_proc_info
},
1526 { UAC_PROCESS_REVERB
, "Reverb", reverb_proc_info
},
1527 { UAC_PROCESS_CHORUS
, "Chorus", chorus_proc_info
},
1528 { UAC_PROCESS_DYN_RANGE_COMP
, "DCR", dcr_proc_info
},
1532 * predefined data for extension units
1534 static struct procunit_value_info clock_rate_xu_info
[] = {
1535 { USB_XU_CLOCK_RATE_SELECTOR
, "Selector", USB_MIXER_U8
, 0 },
1538 static struct procunit_value_info clock_source_xu_info
[] = {
1539 { USB_XU_CLOCK_SOURCE_SELECTOR
, "External", USB_MIXER_BOOLEAN
},
1542 static struct procunit_value_info spdif_format_xu_info
[] = {
1543 { USB_XU_DIGITAL_FORMAT_SELECTOR
, "SPDIF/AC3", USB_MIXER_BOOLEAN
},
1546 static struct procunit_value_info soft_limit_xu_info
[] = {
1547 { USB_XU_SOFT_LIMIT_SELECTOR
, " ", USB_MIXER_BOOLEAN
},
1550 static struct procunit_info extunits
[] = {
1551 { USB_XU_CLOCK_RATE
, "Clock rate", clock_rate_xu_info
},
1552 { USB_XU_CLOCK_SOURCE
, "DigitalIn CLK source", clock_source_xu_info
},
1553 { USB_XU_DIGITAL_IO_STATUS
, "DigitalOut format:", spdif_format_xu_info
},
1554 { USB_XU_DEVICE_OPTIONS
, "AnalogueIn Soft Limit", soft_limit_xu_info
},
1558 * build a processing/extension unit
1560 static int build_audio_procunit(struct mixer_build
*state
, int unitid
, void *raw_desc
, struct procunit_info
*list
, char *name
)
1562 struct uac_processing_unit_descriptor
*desc
= raw_desc
;
1563 int num_ins
= desc
->bNrInPins
;
1564 struct usb_mixer_elem_info
*cval
;
1565 struct snd_kcontrol
*kctl
;
1566 int i
, err
, nameid
, type
, len
;
1567 struct procunit_info
*info
;
1568 struct procunit_value_info
*valinfo
;
1569 const struct usbmix_name_map
*map
;
1570 static struct procunit_value_info default_value_info
[] = {
1571 { 0x01, "Switch", USB_MIXER_BOOLEAN
},
1574 static struct procunit_info default_info
= {
1575 0, NULL
, default_value_info
1578 if (desc
->bLength
< 13 || desc
->bLength
< 13 + num_ins
||
1579 desc
->bLength
< num_ins
+ uac_processing_unit_bControlSize(desc
, state
->mixer
->protocol
)) {
1580 snd_printk(KERN_ERR
"invalid %s descriptor (id %d)\n", name
, unitid
);
1584 for (i
= 0; i
< num_ins
; i
++) {
1585 if ((err
= parse_audio_unit(state
, desc
->baSourceID
[i
])) < 0)
1589 type
= le16_to_cpu(desc
->wProcessType
);
1590 for (info
= list
; info
&& info
->type
; info
++)
1591 if (info
->type
== type
)
1593 if (! info
|| ! info
->type
)
1594 info
= &default_info
;
1596 for (valinfo
= info
->values
; valinfo
->control
; valinfo
++) {
1597 __u8
*controls
= uac_processing_unit_bmControls(desc
, state
->mixer
->protocol
);
1599 if (! (controls
[valinfo
->control
/ 8] & (1 << ((valinfo
->control
% 8) - 1))))
1601 map
= find_map(state
, unitid
, valinfo
->control
);
1602 if (check_ignored_ctl(map
))
1604 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1606 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1609 cval
->mixer
= state
->mixer
;
1611 cval
->control
= valinfo
->control
;
1612 cval
->val_type
= valinfo
->val_type
;
1615 /* get min/max values */
1616 if (type
== UAC_PROCESS_UP_DOWNMIX
&& cval
->control
== UAC_UD_MODE_SELECT
) {
1617 __u8
*control_spec
= uac_processing_unit_specific(desc
, state
->mixer
->protocol
);
1618 /* FIXME: hard-coded */
1620 cval
->max
= control_spec
[0];
1622 cval
->initialized
= 1;
1624 if (type
== USB_XU_CLOCK_RATE
) {
1625 /* E-Mu USB 0404/0202/TrackerPre/0204
1626 * samplerate control quirk
1631 cval
->initialized
= 1;
1633 get_min_max(cval
, valinfo
->min_value
);
1636 kctl
= snd_ctl_new1(&mixer_procunit_ctl
, cval
);
1638 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1642 kctl
->private_free
= usb_mixer_elem_free
;
1644 if (check_mapped_name(map
, kctl
->id
.name
,
1645 sizeof(kctl
->id
.name
)))
1647 else if (info
->name
)
1648 strlcpy(kctl
->id
.name
, info
->name
, sizeof(kctl
->id
.name
));
1650 nameid
= uac_processing_unit_iProcessing(desc
, state
->mixer
->protocol
);
1653 len
= snd_usb_copy_string_desc(state
, nameid
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1655 strlcpy(kctl
->id
.name
, name
, sizeof(kctl
->id
.name
));
1657 append_ctl_name(kctl
, " ");
1658 append_ctl_name(kctl
, valinfo
->suffix
);
1660 snd_printdd(KERN_INFO
"[%d] PU [%s] ch = %d, val = %d/%d\n",
1661 cval
->id
, kctl
->id
.name
, cval
->channels
, cval
->min
, cval
->max
);
1662 if ((err
= snd_usb_mixer_add_control(state
->mixer
, kctl
)) < 0)
1669 static int parse_audio_processing_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1671 return build_audio_procunit(state
, unitid
, raw_desc
, procunits
, "Processing Unit");
1674 static int parse_audio_extension_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1676 /* Note that we parse extension units with processing unit descriptors.
1677 * That's ok as the layout is the same */
1678 return build_audio_procunit(state
, unitid
, raw_desc
, extunits
, "Extension Unit");
1686 /* info callback for selector unit
1687 * use an enumerator type for routing
1689 static int mixer_ctl_selector_info(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_info
*uinfo
)
1691 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1692 const char **itemlist
= (const char **)kcontrol
->private_value
;
1694 if (snd_BUG_ON(!itemlist
))
1696 return snd_ctl_enum_info(uinfo
, 1, cval
->max
, itemlist
);
1699 /* get callback for selector unit */
1700 static int mixer_ctl_selector_get(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1702 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1705 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &val
);
1707 if (cval
->mixer
->ignore_ctl_error
) {
1708 ucontrol
->value
.enumerated
.item
[0] = 0;
1713 val
= get_relative_value(cval
, val
);
1714 ucontrol
->value
.enumerated
.item
[0] = val
;
1718 /* put callback for selector unit */
1719 static int mixer_ctl_selector_put(struct snd_kcontrol
*kcontrol
, struct snd_ctl_elem_value
*ucontrol
)
1721 struct usb_mixer_elem_info
*cval
= kcontrol
->private_data
;
1724 err
= get_cur_ctl_value(cval
, cval
->control
<< 8, &oval
);
1726 if (cval
->mixer
->ignore_ctl_error
)
1730 val
= ucontrol
->value
.enumerated
.item
[0];
1731 val
= get_abs_value(cval
, val
);
1733 set_cur_ctl_value(cval
, cval
->control
<< 8, val
);
1739 /* alsa control interface for selector unit */
1740 static struct snd_kcontrol_new mixer_selectunit_ctl
= {
1741 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
1742 .name
= "", /* will be filled later */
1743 .info
= mixer_ctl_selector_info
,
1744 .get
= mixer_ctl_selector_get
,
1745 .put
= mixer_ctl_selector_put
,
1749 /* private free callback.
1750 * free both private_data and private_value
1752 static void usb_mixer_selector_elem_free(struct snd_kcontrol
*kctl
)
1756 if (kctl
->private_data
) {
1757 struct usb_mixer_elem_info
*cval
= kctl
->private_data
;
1758 num_ins
= cval
->max
;
1760 kctl
->private_data
= NULL
;
1762 if (kctl
->private_value
) {
1763 char **itemlist
= (char **)kctl
->private_value
;
1764 for (i
= 0; i
< num_ins
; i
++)
1767 kctl
->private_value
= 0;
1772 * parse a selector unit
1774 static int parse_audio_selector_unit(struct mixer_build
*state
, int unitid
, void *raw_desc
)
1776 struct uac_selector_unit_descriptor
*desc
= raw_desc
;
1777 unsigned int i
, nameid
, len
;
1779 struct usb_mixer_elem_info
*cval
;
1780 struct snd_kcontrol
*kctl
;
1781 const struct usbmix_name_map
*map
;
1784 if (!desc
->bNrInPins
|| desc
->bLength
< 5 + desc
->bNrInPins
) {
1785 snd_printk(KERN_ERR
"invalid SELECTOR UNIT descriptor %d\n", unitid
);
1789 for (i
= 0; i
< desc
->bNrInPins
; i
++) {
1790 if ((err
= parse_audio_unit(state
, desc
->baSourceID
[i
])) < 0)
1794 if (desc
->bNrInPins
== 1) /* only one ? nonsense! */
1797 map
= find_map(state
, unitid
, 0);
1798 if (check_ignored_ctl(map
))
1801 cval
= kzalloc(sizeof(*cval
), GFP_KERNEL
);
1803 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1806 cval
->mixer
= state
->mixer
;
1808 cval
->val_type
= USB_MIXER_U8
;
1811 cval
->max
= desc
->bNrInPins
;
1813 cval
->initialized
= 1;
1815 if (desc
->bDescriptorSubtype
== UAC2_CLOCK_SELECTOR
)
1816 cval
->control
= UAC2_CX_CLOCK_SELECTOR
;
1820 namelist
= kmalloc(sizeof(char *) * desc
->bNrInPins
, GFP_KERNEL
);
1822 snd_printk(KERN_ERR
"cannot malloc\n");
1826 #define MAX_ITEM_NAME_LEN 64
1827 for (i
= 0; i
< desc
->bNrInPins
; i
++) {
1828 struct usb_audio_term iterm
;
1830 namelist
[i
] = kmalloc(MAX_ITEM_NAME_LEN
, GFP_KERNEL
);
1831 if (! namelist
[i
]) {
1832 snd_printk(KERN_ERR
"cannot malloc\n");
1839 len
= check_mapped_selector_name(state
, unitid
, i
, namelist
[i
],
1841 if (! len
&& check_input_term(state
, desc
->baSourceID
[i
], &iterm
) >= 0)
1842 len
= get_term_name(state
, &iterm
, namelist
[i
], MAX_ITEM_NAME_LEN
, 0);
1844 sprintf(namelist
[i
], "Input %d", i
);
1847 kctl
= snd_ctl_new1(&mixer_selectunit_ctl
, cval
);
1849 snd_printk(KERN_ERR
"cannot malloc kcontrol\n");
1854 kctl
->private_value
= (unsigned long)namelist
;
1855 kctl
->private_free
= usb_mixer_selector_elem_free
;
1857 nameid
= uac_selector_unit_iSelector(desc
);
1858 len
= check_mapped_name(map
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1862 snd_usb_copy_string_desc(state
, nameid
, kctl
->id
.name
, sizeof(kctl
->id
.name
));
1864 len
= get_term_name(state
, &state
->oterm
,
1865 kctl
->id
.name
, sizeof(kctl
->id
.name
), 0);
1867 strlcpy(kctl
->id
.name
, "USB", sizeof(kctl
->id
.name
));
1869 if (desc
->bDescriptorSubtype
== UAC2_CLOCK_SELECTOR
)
1870 append_ctl_name(kctl
, " Clock Source");
1871 else if ((state
->oterm
.type
& 0xff00) == 0x0100)
1872 append_ctl_name(kctl
, " Capture Source");
1874 append_ctl_name(kctl
, " Playback Source");
1877 snd_printdd(KERN_INFO
"[%d] SU [%s] items = %d\n",
1878 cval
->id
, kctl
->id
.name
, desc
->bNrInPins
);
1879 if ((err
= snd_usb_mixer_add_control(state
->mixer
, kctl
)) < 0)
1887 * parse an audio unit recursively
1890 static int parse_audio_unit(struct mixer_build
*state
, int unitid
)
1894 if (test_and_set_bit(unitid
, state
->unitbitmap
))
1895 return 0; /* the unit already visited */
1897 p1
= find_audio_control_unit(state
, unitid
);
1899 snd_printk(KERN_ERR
"usbaudio: unit %d not found!\n", unitid
);
1904 case UAC_INPUT_TERMINAL
:
1905 case UAC2_CLOCK_SOURCE
:
1907 case UAC_MIXER_UNIT
:
1908 return parse_audio_mixer_unit(state
, unitid
, p1
);
1909 case UAC_SELECTOR_UNIT
:
1910 case UAC2_CLOCK_SELECTOR
:
1911 return parse_audio_selector_unit(state
, unitid
, p1
);
1912 case UAC_FEATURE_UNIT
:
1913 return parse_audio_feature_unit(state
, unitid
, p1
);
1914 case UAC1_PROCESSING_UNIT
:
1915 /* UAC2_EFFECT_UNIT has the same value */
1916 if (state
->mixer
->protocol
== UAC_VERSION_1
)
1917 return parse_audio_processing_unit(state
, unitid
, p1
);
1919 return 0; /* FIXME - effect units not implemented yet */
1920 case UAC1_EXTENSION_UNIT
:
1921 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1922 if (state
->mixer
->protocol
== UAC_VERSION_1
)
1923 return parse_audio_extension_unit(state
, unitid
, p1
);
1924 else /* UAC_VERSION_2 */
1925 return parse_audio_processing_unit(state
, unitid
, p1
);
1927 snd_printk(KERN_ERR
"usbaudio: unit %u: unexpected type 0x%02x\n", unitid
, p1
[2]);
1932 static void snd_usb_mixer_free(struct usb_mixer_interface
*mixer
)
1934 kfree(mixer
->id_elems
);
1936 kfree(mixer
->urb
->transfer_buffer
);
1937 usb_free_urb(mixer
->urb
);
1939 usb_free_urb(mixer
->rc_urb
);
1940 kfree(mixer
->rc_setup_packet
);
1944 static int snd_usb_mixer_dev_free(struct snd_device
*device
)
1946 struct usb_mixer_interface
*mixer
= device
->device_data
;
1947 snd_usb_mixer_free(mixer
);
1952 * create mixer controls
1954 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1956 static int snd_usb_mixer_controls(struct usb_mixer_interface
*mixer
)
1958 struct mixer_build state
;
1960 const struct usbmix_ctl_map
*map
;
1963 memset(&state
, 0, sizeof(state
));
1964 state
.chip
= mixer
->chip
;
1965 state
.mixer
= mixer
;
1966 state
.buffer
= mixer
->hostif
->extra
;
1967 state
.buflen
= mixer
->hostif
->extralen
;
1969 /* check the mapping table */
1970 for (map
= usbmix_ctl_maps
; map
->id
; map
++) {
1971 if (map
->id
== state
.chip
->usb_id
) {
1972 state
.map
= map
->map
;
1973 state
.selector_map
= map
->selector_map
;
1974 mixer
->ignore_ctl_error
= map
->ignore_ctl_error
;
1980 while ((p
= snd_usb_find_csint_desc(mixer
->hostif
->extra
, mixer
->hostif
->extralen
,
1981 p
, UAC_OUTPUT_TERMINAL
)) != NULL
) {
1982 if (mixer
->protocol
== UAC_VERSION_1
) {
1983 struct uac1_output_terminal_descriptor
*desc
= p
;
1985 if (desc
->bLength
< sizeof(*desc
))
1986 continue; /* invalid descriptor? */
1987 set_bit(desc
->bTerminalID
, state
.unitbitmap
); /* mark terminal ID as visited */
1988 state
.oterm
.id
= desc
->bTerminalID
;
1989 state
.oterm
.type
= le16_to_cpu(desc
->wTerminalType
);
1990 state
.oterm
.name
= desc
->iTerminal
;
1991 err
= parse_audio_unit(&state
, desc
->bSourceID
);
1994 } else { /* UAC_VERSION_2 */
1995 struct uac2_output_terminal_descriptor
*desc
= p
;
1997 if (desc
->bLength
< sizeof(*desc
))
1998 continue; /* invalid descriptor? */
1999 set_bit(desc
->bTerminalID
, state
.unitbitmap
); /* mark terminal ID as visited */
2000 state
.oterm
.id
= desc
->bTerminalID
;
2001 state
.oterm
.type
= le16_to_cpu(desc
->wTerminalType
);
2002 state
.oterm
.name
= desc
->iTerminal
;
2003 err
= parse_audio_unit(&state
, desc
->bSourceID
);
2007 /* for UAC2, use the same approach to also add the clock selectors */
2008 err
= parse_audio_unit(&state
, desc
->bCSourceID
);
2017 void snd_usb_mixer_notify_id(struct usb_mixer_interface
*mixer
, int unitid
)
2019 struct usb_mixer_elem_info
*info
;
2021 for (info
= mixer
->id_elems
[unitid
]; info
; info
= info
->next_id_elem
)
2022 snd_ctl_notify(mixer
->chip
->card
, SNDRV_CTL_EVENT_MASK_VALUE
,
2026 static void snd_usb_mixer_dump_cval(struct snd_info_buffer
*buffer
,
2028 struct usb_mixer_elem_info
*cval
)
2030 static char *val_types
[] = {"BOOLEAN", "INV_BOOLEAN",
2031 "S8", "U8", "S16", "U16"};
2032 snd_iprintf(buffer
, " Unit: %i\n", unitid
);
2034 snd_iprintf(buffer
, " Control: name=\"%s\", index=%i\n",
2035 cval
->elem_id
->name
, cval
->elem_id
->index
);
2036 snd_iprintf(buffer
, " Info: id=%i, control=%i, cmask=0x%x, "
2037 "channels=%i, type=\"%s\"\n", cval
->id
,
2038 cval
->control
, cval
->cmask
, cval
->channels
,
2039 val_types
[cval
->val_type
]);
2040 snd_iprintf(buffer
, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2041 cval
->min
, cval
->max
, cval
->dBmin
, cval
->dBmax
);
2044 static void snd_usb_mixer_proc_read(struct snd_info_entry
*entry
,
2045 struct snd_info_buffer
*buffer
)
2047 struct snd_usb_audio
*chip
= entry
->private_data
;
2048 struct usb_mixer_interface
*mixer
;
2049 struct usb_mixer_elem_info
*cval
;
2052 list_for_each_entry(mixer
, &chip
->mixer_list
, list
) {
2054 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2055 chip
->usb_id
, snd_usb_ctrl_intf(chip
),
2056 mixer
->ignore_ctl_error
);
2057 snd_iprintf(buffer
, "Card: %s\n", chip
->card
->longname
);
2058 for (unitid
= 0; unitid
< MAX_ID_ELEMS
; unitid
++) {
2059 for (cval
= mixer
->id_elems
[unitid
]; cval
;
2060 cval
= cval
->next_id_elem
)
2061 snd_usb_mixer_dump_cval(buffer
, unitid
, cval
);
2066 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface
*mixer
,
2067 int attribute
, int value
, int index
)
2069 struct usb_mixer_elem_info
*info
;
2070 __u8 unitid
= (index
>> 8) & 0xff;
2071 __u8 control
= (value
>> 8) & 0xff;
2072 __u8 channel
= value
& 0xff;
2074 if (channel
>= MAX_CHANNELS
) {
2075 snd_printk(KERN_DEBUG
"%s(): bogus channel number %d\n",
2080 for (info
= mixer
->id_elems
[unitid
]; info
; info
= info
->next_id_elem
) {
2081 if (info
->control
!= control
)
2084 switch (attribute
) {
2086 /* invalidate cache, so the value is read from the device */
2088 info
->cached
&= ~(1 << channel
);
2089 else /* master channel */
2092 snd_ctl_notify(mixer
->chip
->card
, SNDRV_CTL_EVENT_MASK_VALUE
,
2105 snd_printk(KERN_DEBUG
"unknown attribute %d in interrupt\n",
2112 static void snd_usb_mixer_interrupt(struct urb
*urb
)
2114 struct usb_mixer_interface
*mixer
= urb
->context
;
2115 int len
= urb
->actual_length
;
2116 int ustatus
= urb
->status
;
2121 if (mixer
->protocol
== UAC_VERSION_1
) {
2122 struct uac1_status_word
*status
;
2124 for (status
= urb
->transfer_buffer
;
2125 len
>= sizeof(*status
);
2126 len
-= sizeof(*status
), status
++) {
2127 snd_printd(KERN_DEBUG
"status interrupt: %02x %02x\n",
2128 status
->bStatusType
,
2129 status
->bOriginator
);
2131 /* ignore any notifications not from the control interface */
2132 if ((status
->bStatusType
& UAC1_STATUS_TYPE_ORIG_MASK
) !=
2133 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF
)
2136 if (status
->bStatusType
& UAC1_STATUS_TYPE_MEM_CHANGED
)
2137 snd_usb_mixer_rc_memory_change(mixer
, status
->bOriginator
);
2139 snd_usb_mixer_notify_id(mixer
, status
->bOriginator
);
2141 } else { /* UAC_VERSION_2 */
2142 struct uac2_interrupt_data_msg
*msg
;
2144 for (msg
= urb
->transfer_buffer
;
2145 len
>= sizeof(*msg
);
2146 len
-= sizeof(*msg
), msg
++) {
2147 /* drop vendor specific and endpoint requests */
2148 if ((msg
->bInfo
& UAC2_INTERRUPT_DATA_MSG_VENDOR
) ||
2149 (msg
->bInfo
& UAC2_INTERRUPT_DATA_MSG_EP
))
2152 snd_usb_mixer_interrupt_v2(mixer
, msg
->bAttribute
,
2153 le16_to_cpu(msg
->wValue
),
2154 le16_to_cpu(msg
->wIndex
));
2159 if (ustatus
!= -ENOENT
&& ustatus
!= -ECONNRESET
&& ustatus
!= -ESHUTDOWN
) {
2160 urb
->dev
= mixer
->chip
->dev
;
2161 usb_submit_urb(urb
, GFP_ATOMIC
);
2165 /* stop any bus activity of a mixer */
2166 void snd_usb_mixer_inactivate(struct usb_mixer_interface
*mixer
)
2168 usb_kill_urb(mixer
->urb
);
2169 usb_kill_urb(mixer
->rc_urb
);
2172 int snd_usb_mixer_activate(struct usb_mixer_interface
*mixer
)
2177 err
= usb_submit_urb(mixer
->urb
, GFP_NOIO
);
2185 /* create the handler for the optional status interrupt endpoint */
2186 static int snd_usb_mixer_status_create(struct usb_mixer_interface
*mixer
)
2188 struct usb_endpoint_descriptor
*ep
;
2189 void *transfer_buffer
;
2193 /* we need one interrupt input endpoint */
2194 if (get_iface_desc(mixer
->hostif
)->bNumEndpoints
< 1)
2196 ep
= get_endpoint(mixer
->hostif
, 0);
2197 if (!usb_endpoint_dir_in(ep
) || !usb_endpoint_xfer_int(ep
))
2200 epnum
= usb_endpoint_num(ep
);
2201 buffer_length
= le16_to_cpu(ep
->wMaxPacketSize
);
2202 transfer_buffer
= kmalloc(buffer_length
, GFP_KERNEL
);
2203 if (!transfer_buffer
)
2205 mixer
->urb
= usb_alloc_urb(0, GFP_KERNEL
);
2207 kfree(transfer_buffer
);
2210 usb_fill_int_urb(mixer
->urb
, mixer
->chip
->dev
,
2211 usb_rcvintpipe(mixer
->chip
->dev
, epnum
),
2212 transfer_buffer
, buffer_length
,
2213 snd_usb_mixer_interrupt
, mixer
, ep
->bInterval
);
2214 usb_submit_urb(mixer
->urb
, GFP_KERNEL
);
2218 int snd_usb_create_mixer(struct snd_usb_audio
*chip
, int ctrlif
,
2221 static struct snd_device_ops dev_ops
= {
2222 .dev_free
= snd_usb_mixer_dev_free
2224 struct usb_mixer_interface
*mixer
;
2225 struct snd_info_entry
*entry
;
2228 strcpy(chip
->card
->mixername
, "USB Mixer");
2230 mixer
= kzalloc(sizeof(*mixer
), GFP_KERNEL
);
2234 mixer
->ignore_ctl_error
= ignore_error
;
2235 mixer
->id_elems
= kcalloc(MAX_ID_ELEMS
, sizeof(*mixer
->id_elems
),
2237 if (!mixer
->id_elems
) {
2242 mixer
->hostif
= &usb_ifnum_to_if(chip
->dev
, ctrlif
)->altsetting
[0];
2243 switch (get_iface_desc(mixer
->hostif
)->bInterfaceProtocol
) {
2246 mixer
->protocol
= UAC_VERSION_1
;
2249 mixer
->protocol
= UAC_VERSION_2
;
2253 if ((err
= snd_usb_mixer_controls(mixer
)) < 0 ||
2254 (err
= snd_usb_mixer_status_create(mixer
)) < 0)
2257 snd_usb_mixer_apply_create_quirk(mixer
);
2259 err
= snd_device_new(chip
->card
, SNDRV_DEV_LOWLEVEL
, mixer
, &dev_ops
);
2263 if (list_empty(&chip
->mixer_list
) &&
2264 !snd_card_proc_new(chip
->card
, "usbmixer", &entry
))
2265 snd_info_set_text_ops(entry
, chip
, snd_usb_mixer_proc_read
);
2267 list_add(&mixer
->list
, &chip
->mixer_list
);
2271 snd_usb_mixer_free(mixer
);
2275 void snd_usb_mixer_disconnect(struct list_head
*p
)
2277 struct usb_mixer_interface
*mixer
;
2279 mixer
= list_entry(p
, struct usb_mixer_interface
, list
);
2280 usb_kill_urb(mixer
->urb
);
2281 usb_kill_urb(mixer
->rc_urb
);