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 #define ID_LEN 32 29 30 /* status flag */ 31 #define SNDRV_SEQ_DEVICE_FREE 0 32 #define SNDRV_SEQ_DEVICE_REGISTERED 1 33 34 struct snd_seq_device { 35 /* device info */ 36 struct snd_card *card; /* sound card */ 37 int device; /* device number */ 38 char id[ID_LEN]; /* driver id */ 39 char name[80]; /* device name */ 40 int argsize; /* size of the argument */ 41 void *driver_data; /* private data for driver */ 42 int status; /* flag - read only */ 43 void *private_data; /* private data for the caller */ 44 void (*private_free)(struct snd_seq_device *device); 45 struct list_head list; /* link to next device */ 46 }; 47 48 49 /* driver operators 50 * init_device: 51 * Initialize the device with given parameters. 52 * Typically, 53 * 1. call snd_hwdep_new 54 * 2. allocate private data and initialize it 55 * 3. call snd_hwdep_register 56 * 4. store the instance to dev->driver_data pointer. 57 * 58 * free_device: 59 * Release the private data. 60 * Typically, call snd_device_free(dev->card, dev->driver_data) 61 */ 62 struct snd_seq_dev_ops { 63 int (*init_device)(struct snd_seq_device *dev); 64 int (*free_device)(struct snd_seq_device *dev); 65 }; 66 67 /* 68 * prototypes 69 */ 70 void snd_seq_device_load_drivers(void); 71 int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, struct snd_seq_device **result); 72 int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, int argsize); 73 int snd_seq_device_unregister_driver(char *id); 74 75 #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device)) 76 77 78 /* 79 * id strings for generic devices 80 */ 81 #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" 82 #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" 83 84 #endif /* __SOUND_SEQ_DEVICE_H */ 85