Viewing file:  seq_device.h (2.11 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_SEQ_DEVICE_H
#define __SOUND_SEQ_DEVICE_H
/*
* ALSA sequencer device management
* Copyright (c) 1999 by Takashi Iwai <[email protected]>
*/
/*
* registered device information
*/
struct snd_seq_device {
/* device info */
struct snd_card *card; /* sound card */
int device; /* device number */
const char *id; /* driver id */
char name[80]; /* device name */
int argsize; /* size of the argument */
void *driver_data; /* private data for driver */
void *private_data; /* private data for the caller */
void (*private_free)(struct snd_seq_device *device);
struct device dev;
};
#define to_seq_dev(_dev) \
container_of(_dev, struct snd_seq_device, dev)
/* sequencer driver */
/* driver operators
* probe:
* Initialize the device with given parameters.
* Typically,
* 1. call snd_hwdep_new
* 2. allocate private data and initialize it
* 3. call snd_hwdep_register
* 4. store the instance to dev->driver_data pointer.
*
* remove:
* Release the private data.
* Typically, call snd_device_free(dev->card, dev->driver_data)
*/
struct snd_seq_driver {
struct device_driver driver;
char *id;
int argsize;
};
#define to_seq_drv(_drv) \
container_of(_drv, struct snd_seq_driver, driver)
/*
* prototypes
*/
#ifdef CONFIG_MODULES
void snd_seq_device_load_drivers(void);
#else
#define snd_seq_device_load_drivers()
#endif
int snd_seq_device_new(struct snd_card *card, int device, const char *id,
int argsize, struct snd_seq_device **result);
#define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device))
int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv,
struct module *mod);
#define snd_seq_driver_register(drv) \
__snd_seq_driver_register(drv, THIS_MODULE)
void snd_seq_driver_unregister(struct snd_seq_driver *drv);
#define module_snd_seq_driver(drv) \
module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister)
/*
* id strings for generic devices
*/
#define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi"
#define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth"
#endif /* __SOUND_SEQ_DEVICE_H */
|