1 #ifndef __SOUND_SEQ_DEVICE_H 2 #define __SOUND_SEQ_DEVICE_H 3 4 /* 5 * ALSA sequencer device management 6 * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 /* 25 * registered device information 26 */ 27 28 struct snd_seq_device { 29 /* device info */ 30 struct snd_card *card; /* sound card */ 31 int device; /* device number */ 32 const char *id; /* driver id */ 33 char name[80]; /* device name */ 34 int argsize; /* size of the argument */ 35 void *driver_data; /* private data for driver */ 36 void *private_data; /* private data for the caller */ 37 void (*private_free)(struct snd_seq_device *device); 38 struct device dev; 39 }; 40 41 #define to_seq_dev(_dev) \ 42 container_of(_dev, struct snd_seq_device, dev) 43 44 /* sequencer driver */ 45 46 /* driver operators 47 * probe: 48 * Initialize the device with given parameters. 49 * Typically, 50 * 1. call snd_hwdep_new 51 * 2. allocate private data and initialize it 52 * 3. call snd_hwdep_register 53 * 4. store the instance to dev->driver_data pointer. 54 * 55 * remove: 56 * Release the private data. 57 * Typically, call snd_device_free(dev->card, dev->driver_data) 58 */ 59 struct snd_seq_driver { 60 struct device_driver driver; 61 char *id; 62 int argsize; 63 }; 64 65 #define to_seq_drv(_drv) \ 66 container_of(_drv, struct snd_seq_driver, driver) 67 68 /* 69 * prototypes 70 */ 71 #ifdef CONFIG_MODULES 72 void snd_seq_device_load_drivers(void); 73 #else 74 #define snd_seq_device_load_drivers() 75 #endif 76 int snd_seq_device_new(struct snd_card *card, int device, const char *id, 77 int argsize, struct snd_seq_device **result); 78 79 #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device)) 80 81 int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv, 82 struct module *mod); 83 #define snd_seq_driver_register(drv) \ 84 __snd_seq_driver_register(drv, THIS_MODULE) 85 void snd_seq_driver_unregister(struct snd_seq_driver *drv); 86 87 #define module_snd_seq_driver(drv) \ 88 module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister) 89 90 /* 91 * id strings for generic devices 92 */ 93 #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" 94 #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" 95 96 #endif /* __SOUND_SEQ_DEVICE_H */ 97