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 #define SNDRV_SEQ_DEV_ID_UMP "seq-ump-client"
82
83 #endif /* __SOUND_SEQ_DEVICE_H */
84
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