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