/* 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 */