device.c File Reference

#include <linux/slab.h>
#include <linux/time.h>
#include <linux/export.h>
#include <linux/errno.h>
#include <sound/core.h>

Go to the source code of this file.

Functions
int	snd_device_new (struct snd_card *card, snd_device_type_t type, void *device_data, struct snd_device_ops *ops)
	EXPORT_SYMBOL (snd_device_new)
int	snd_device_free (struct snd_card *card, void *device_data)
	EXPORT_SYMBOL (snd_device_free)
int	snd_device_disconnect (struct snd_card *card, void *device_data)
int	snd_device_register (struct snd_card *card, void *device_data)
	EXPORT_SYMBOL (snd_device_register)
int	snd_device_register_all (struct snd_card *card)
int	snd_device_disconnect_all (struct snd_card *card)
int	snd_device_free_all (struct snd_card *card, snd_device_cmd_t cmd)

Function Documentation

EXPORT_SYMBOL

(

snd_device_new

)

EXPORT_SYMBOL

(

snd_device_free

)

EXPORT_SYMBOL

(

snd_device_register

)

int snd_device_disconnect	(	struct snd_card *	card,
		void *	device_data
	)

snd_device_disconnect - disconnect the device : the card instance : the data pointer to disconnect

Turns the device into the disconnection state, invoking dev_disconnect callback, if the device was already registered.

Usually called from snd_card_disconnect().

Returns zero if successful, or a negative error code on failure or if the device not found.

Definition at line 122 of file device.c.

int snd_device_disconnect_all

(

struct snd_card *

card

)

Definition at line 207 of file device.c.

int snd_device_free	(	struct snd_card *	card,
		void *	device_data
	)

snd_device_free - release the device from the card : the card instance : the data pointer to release

Removes the device from the list on the card and invokes the callbacks, dev_disconnect and dev_free, corresponding to the state. Then release the device.

Returns zero if successful, or a negative error code on failure or if the device not found.

Definition at line 79 of file device.c.

int snd_device_free_all	(	struct snd_card *	card,
		snd_device_cmd_t	cmd
	)

Definition at line 225 of file device.c.

int snd_device_new	(	struct snd_card *	card,
		snd_device_type_t	type,
		void *	device_data,
		struct snd_device_ops *	ops
	)

snd_device_new - create an ALSA device component : the card instance : the device type, SNDRV_DEV_XXX : the data pointer of this device : the operator table

Creates a new device component for the given data pointer. The device will be assigned to the card and managed together by the card.

The data pointer plays a role as the identifier, too, so the pointer address must be unique and unchanged.

Returns zero if successful, or a negative error code on failure.

Definition at line 44 of file device.c.

int snd_device_register	(	struct snd_card *	card,
		void *	device_data
	)

snd_device_register - register the device : the card instance : the data pointer to register

Registers the device which was already created via snd_device_new(). Usually this is called from snd_card_register(), but it can be called later if any new devices are created after invocation of snd_card_register().

Returns zero if successful, or a negative error code on failure or if the device not found.

Definition at line 157 of file device.c.

int snd_device_register_all

(

struct snd_card *

card

)

Definition at line 186 of file device.c.