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 unsigned char args[]; /* driver-specific argument */ 26 }; 27 28 #define to_seq_dev(_dev) \ 29 container_of(_dev, struct snd_seq_device, dev) 30 31 /* sequencer driver */ 32 33 /* driver operators 34 * probe: 35 * Initialize the device with given parameters. 36 * Typically, 37 * 1. call snd_hwdep_new 38 * 2. allocate private data and initialize it 39 * 3. call snd_hwdep_register 40 * 4. store the instance to dev->driver_data pointer. 41 * 42 * remove: 43 * Release the private data. 44 * Typically, call snd_device_free(dev->card, dev->driver_data) 45 */ 46 struct snd_seq_driver { 47 int (*probe)(struct snd_seq_device *dev); 48 void (*remove)(struct snd_seq_device *dev); 49 struct device_driver driver; 50 char *id; 51 int argsize; 52 }; 53 54 #define to_seq_drv(_drv) \ 55 container_of(_drv, struct snd_seq_driver, driver) 56 57 /* 58 * prototypes 59 */ 60 #ifdef CONFIG_MODULES 61 void snd_seq_device_load_drivers(void); 62 #else 63 #define snd_seq_device_load_drivers() 64 #endif 65 int snd_seq_device_new(struct snd_card *card, int device, const char *id, 66 int argsize, struct snd_seq_device **result); 67 68 #define SNDRV_SEQ_DEVICE_ARGPTR(dev) ((void *)(dev)->args) 69 70 int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv, 71 struct module *mod); 72 #define snd_seq_driver_register(drv) \ 73 __snd_seq_driver_register(drv, THIS_MODULE) 74 void snd_seq_driver_unregister(struct snd_seq_driver *drv); 75 76 #define module_snd_seq_driver(drv) \ 77 module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister) 78 79 /* 80 * id strings for generic devices 81 */ 82 #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" 83 #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" 84 #define SNDRV_SEQ_DEV_ID_UMP "seq-ump-client" 85 86 #endif /* __SOUND_SEQ_DEVICE_H */ 87