1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun #ifndef __SOUND_SEQ_DEVICE_H 3*4882a593Smuzhiyun #define __SOUND_SEQ_DEVICE_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * ALSA sequencer device management 7*4882a593Smuzhiyun * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de> 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* 11*4882a593Smuzhiyun * registered device information 12*4882a593Smuzhiyun */ 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun struct snd_seq_device { 15*4882a593Smuzhiyun /* device info */ 16*4882a593Smuzhiyun struct snd_card *card; /* sound card */ 17*4882a593Smuzhiyun int device; /* device number */ 18*4882a593Smuzhiyun const char *id; /* driver id */ 19*4882a593Smuzhiyun char name[80]; /* device name */ 20*4882a593Smuzhiyun int argsize; /* size of the argument */ 21*4882a593Smuzhiyun void *driver_data; /* private data for driver */ 22*4882a593Smuzhiyun void *private_data; /* private data for the caller */ 23*4882a593Smuzhiyun void (*private_free)(struct snd_seq_device *device); 24*4882a593Smuzhiyun struct device dev; 25*4882a593Smuzhiyun }; 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun #define to_seq_dev(_dev) \ 28*4882a593Smuzhiyun container_of(_dev, struct snd_seq_device, dev) 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* sequencer driver */ 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun /* driver operators 33*4882a593Smuzhiyun * probe: 34*4882a593Smuzhiyun * Initialize the device with given parameters. 35*4882a593Smuzhiyun * Typically, 36*4882a593Smuzhiyun * 1. call snd_hwdep_new 37*4882a593Smuzhiyun * 2. allocate private data and initialize it 38*4882a593Smuzhiyun * 3. call snd_hwdep_register 39*4882a593Smuzhiyun * 4. store the instance to dev->driver_data pointer. 40*4882a593Smuzhiyun * 41*4882a593Smuzhiyun * remove: 42*4882a593Smuzhiyun * Release the private data. 43*4882a593Smuzhiyun * Typically, call snd_device_free(dev->card, dev->driver_data) 44*4882a593Smuzhiyun */ 45*4882a593Smuzhiyun struct snd_seq_driver { 46*4882a593Smuzhiyun struct device_driver driver; 47*4882a593Smuzhiyun char *id; 48*4882a593Smuzhiyun int argsize; 49*4882a593Smuzhiyun }; 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun #define to_seq_drv(_drv) \ 52*4882a593Smuzhiyun container_of(_drv, struct snd_seq_driver, driver) 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun /* 55*4882a593Smuzhiyun * prototypes 56*4882a593Smuzhiyun */ 57*4882a593Smuzhiyun #ifdef CONFIG_MODULES 58*4882a593Smuzhiyun void snd_seq_device_load_drivers(void); 59*4882a593Smuzhiyun #else 60*4882a593Smuzhiyun #define snd_seq_device_load_drivers() 61*4882a593Smuzhiyun #endif 62*4882a593Smuzhiyun int snd_seq_device_new(struct snd_card *card, int device, const char *id, 63*4882a593Smuzhiyun int argsize, struct snd_seq_device **result); 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device)) 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv, 68*4882a593Smuzhiyun struct module *mod); 69*4882a593Smuzhiyun #define snd_seq_driver_register(drv) \ 70*4882a593Smuzhiyun __snd_seq_driver_register(drv, THIS_MODULE) 71*4882a593Smuzhiyun void snd_seq_driver_unregister(struct snd_seq_driver *drv); 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun #define module_snd_seq_driver(drv) \ 74*4882a593Smuzhiyun module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister) 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun /* 77*4882a593Smuzhiyun * id strings for generic devices 78*4882a593Smuzhiyun */ 79*4882a593Smuzhiyun #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" 80*4882a593Smuzhiyun #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun #endif /* __SOUND_SEQ_DEVICE_H */ 83