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ALSA: usb-audio: export snd_usb_feature_unit_ctl 

In order to allow quirks functions to hook up to the standard feature
unit op tables, this patch exports a pointer to the struct that is used
internally.

That way, all the code handling the control can be kept private, and
external code can reference the symbol to re-use it.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
hifive-unleashed-5.1
Daniel Mack 2011-05-25 09:09:01 +02:00 committed by Takashi Iwai
parent ef9d597089
commit 9e38658f70
4 changed files with 15 additions and 11 deletions
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1
sound/usb/card.c
View File

@ -48,6 +48,7 @@
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/pcm.h>

13
sound/usb/mixer.c
View File

@ -86,16 +86,6 @@ struct mixer_build {
const struct usbmix_selector_map *selector_map;
};
enum {
USB_MIXER_BOOLEAN,
USB_MIXER_INV_BOOLEAN,
USB_MIXER_S8,
USB_MIXER_U8,
USB_MIXER_S16,
USB_MIXER_U16,
};
/*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
enum {
USB_XU_CLOCK_RATE = 0xe301,
@ -985,6 +975,9 @@ static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
.put = NULL,
};
/* This symbol is exported in order to allow the mixer quirks to
* hook up to the standard feature unit control mechanism */
struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
/*
* build a feature control

11
sound/usb/mixer.h
View File

@ -24,7 +24,16 @@ struct usb_mixer_interface {
u8 xonar_u1_status;
};
#define MAX_CHANNELS 10 /* max logical channels */
#define MAX_CHANNELS 16 /* max logical channels */
enum {
USB_MIXER_BOOLEAN,
USB_MIXER_INV_BOOLEAN,
USB_MIXER_S8,
USB_MIXER_U8,
USB_MIXER_S16,
USB_MIXER_U16,
};
struct usb_mixer_elem_info {
struct usb_mixer_interface *mixer;

1
sound/usb/quirks.c
View File

@ -19,6 +19,7 @@
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/pcm.h>