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ALSA: usb-audio: Scarlett Gen 2 mixer interface 

Add mixer quirk for the Focusrite Scarlett 6i6, 18i8, and 18i20 Gen 2
audio interfaces. Although the interfaces are USB compliant,
additional input/output level controls and hardware routing/mixing
functionality are available using proprietary USB requests.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Geoffrey D. Bennett 2019-07-29 00:42:45 +09:30 committed by Takashi Iwai
parent 2127c01b7f
commit 9e4d5c1be2
6 changed files with 2098 additions and 0 deletions
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1
sound/usb/Makefile
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@ -11,6 +11,7 @@ snd-usb-audio-objs := card.o \
mixer.o \
mixer_quirks.o \
mixer_scarlett.o \
mixer_scarlett_gen2.o \
mixer_us16x08.o \
pcm.o \
power.o \

4
sound/usb/mixer.c
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@ -3509,6 +3509,8 @@ void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
usb_kill_urb(mixer->urb);
if (mixer->rc_urb)
usb_kill_urb(mixer->rc_urb);
if (mixer->private_free)
mixer->private_free(mixer);
mixer->disconnected = true;
}
@ -3536,6 +3538,8 @@ static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
{
snd_usb_mixer_inactivate(mixer);
if (mixer->private_suspend)
mixer->private_suspend(mixer);
return 0;
}

4
sound/usb/mixer.h
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@ -28,6 +28,10 @@ struct usb_mixer_interface {
struct media_mixer_ctl *media_mixer_ctl;
bool disconnected;
void *private_data;
void (*private_free)(struct usb_mixer_interface *mixer);
void (*private_suspend)(struct usb_mixer_interface *mixer);
};
#define MAX_CHANNELS 16 /* max logical channels */

7
sound/usb/mixer_quirks.c
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@ -32,6 +32,7 @@
#include "mixer.h"
#include "mixer_quirks.h"
#include "mixer_scarlett.h"
#include "mixer_scarlett_gen2.h"
#include "mixer_us16x08.h"
#include "helper.h"
@ -2258,6 +2259,12 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
err = snd_scarlett_controls_create(mixer);
break;
case USB_ID(0x1235, 0x8203): /* Focusrite Scarlett 6i6 2nd Gen */
case USB_ID(0x1235, 0x8204): /* Focusrite Scarlett 18i8 2nd Gen */
case USB_ID(0x1235, 0x8201): /* Focusrite Scarlett 18i20 2nd Gen */
err = snd_scarlett_gen2_controls_create(mixer);
break;
case USB_ID(0x041e, 0x323b): /* Creative Sound Blaster E1 */
err = snd_soundblaster_e1_switch_create(mixer);
break;

2075
sound/usb/mixer_scarlett_gen2.c Normal file
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File diff suppressed because it is too large Load Diff

7
sound/usb/mixer_scarlett_gen2.h Normal file
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@ -0,0 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __USB_MIXER_SCARLETT_GEN2_H
#define __USB_MIXER_SCARLETT_GEN2_H
int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer);
#endif /* __USB_MIXER_SCARLETT_GEN2_H */