/* 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 <tiwai@suse.de> */ /* * 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 */