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
34struct 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 */
62struct 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 */
70void snd_seq_device_load_drivers(void);
71int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, struct snd_seq_device **result);
72int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, int argsize);
73int 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