Release 4.11 sound/usb/mixer.h

#ifndef __USBMIXER_H

#define __USBMIXER_H

#include <sound/info.h>


struct usb_mixer_interface {
	
struct snd_usb_audio *chip;
	
struct usb_host_interface *hostif;
	
struct list_head list;
	
unsigned int ignore_ctl_error;
	
struct urb *urb;
	/* array[MAX_ID_ELEMS], indexed by unit id */
	
struct usb_mixer_elem_list **id_elems;

	/* the usb audio specification version this interface complies to */
	
int protocol;

	/* Sound Blaster remote control stuff */
	
const struct rc_config *rc_cfg;
	
u32 rc_code;
	
wait_queue_head_t rc_waitq;
	
struct urb *rc_urb;
	
struct usb_ctrlrequest *rc_setup_packet;
	
u8 rc_buffer[6];
};


#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,
	
USB_MIXER_S32,
	
USB_MIXER_U32,
};


typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
					 struct usb_mixer_elem_list *list);

typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);


struct usb_mixer_elem_list {
	
struct usb_mixer_interface *mixer;
	
struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
	
struct snd_kcontrol *kctl;
	
unsigned int id;
	
usb_mixer_elem_dump_func_t dump;
	
usb_mixer_elem_resume_func_t resume;
};


struct usb_mixer_elem_info {
	
struct usb_mixer_elem_list head;
	
unsigned int control;	/* CS or ICN (high byte) */
	
unsigned int cmask; /* channel mask bitmap: 0 = master */
	
unsigned int idx_off; /* Control index offset */
	
unsigned int ch_readonly;
	
unsigned int master_readonly;
	
int channels;
	
int val_type;
	


int min, max, res;
	

int dBmin, dBmax;
	
int cached;
	
int cache_val[MAX_CHANNELS];
	
u8 initialized;
	
void *private_data;
};

int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
			 int ignore_error);
void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);

void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);

int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
				int request, int validx, int value_set);

int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
			      struct snd_kcontrol *kctl);

void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
				 struct usb_mixer_interface *mixer,
				 int unitid);

int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
			  unsigned int size, unsigned int __user *_tlv);

#ifdef CONFIG_PM
int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
#endif

int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
                             int index, int value);

int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
                             int channel, int index, int *value);

extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);

#endif /* __USBMIXER_H */
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Directory: sound/usb

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