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 
82 #endif /* __SOUND_SEQ_DEVICE_H */
83