1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * OSS compatible sequencer driver
4  *
5  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
6  */
7 
8 #ifndef __SEQ_OSS_DEVICE_H
9 #define __SEQ_OSS_DEVICE_H
10 
11 #include <linux/time.h>
12 #include <linux/wait.h>
13 #include <linux/slab.h>
14 #include <linux/sched/signal.h>
15 #include <sound/core.h>
16 #include <sound/seq_oss.h>
17 #include <sound/rawmidi.h>
18 #include <sound/seq_kernel.h>
19 #include <sound/info.h>
20 #include "../seq_clientmgr.h"
21 
22 /* max. applications */
23 #define SNDRV_SEQ_OSS_MAX_CLIENTS	16
24 #define SNDRV_SEQ_OSS_MAX_SYNTH_DEVS	16
25 #define SNDRV_SEQ_OSS_MAX_MIDI_DEVS	32
26 
27 /* version */
28 #define SNDRV_SEQ_OSS_MAJOR_VERSION	0
29 #define SNDRV_SEQ_OSS_MINOR_VERSION	1
30 #define SNDRV_SEQ_OSS_TINY_VERSION	8
31 #define SNDRV_SEQ_OSS_VERSION_STR	"0.1.8"
32 
33 /* device and proc interface name */
34 #define SNDRV_SEQ_OSS_PROCNAME		"oss"
35 
36 
37 /*
38  * type definitions
39  */
40 
41 typedef unsigned int reltime_t;
42 typedef unsigned int abstime_t;
43 
44 
45 /*
46  * synthesizer channel information
47  */
48 struct seq_oss_chinfo {
49 	int note, vel;
50 };
51 
52 /*
53  * synthesizer information
54  */
55 struct seq_oss_synthinfo {
56 	struct snd_seq_oss_arg arg;
57 	struct seq_oss_chinfo *ch;
58 	struct seq_oss_synth_sysex *sysex;
59 	int nr_voices;
60 	int opened;
61 	int is_midi;
62 	int midi_mapped;
63 };
64 
65 
66 /*
67  * sequencer client information
68  */
69 
70 struct seq_oss_devinfo {
71 
72 	int index;	/* application index */
73 	int cseq;	/* sequencer client number */
74 	int port;	/* sequencer port number */
75 	int queue;	/* sequencer queue number */
76 
77 	struct snd_seq_addr addr;	/* address of this device */
78 
79 	int seq_mode;	/* sequencer mode */
80 	int file_mode;	/* file access */
81 
82 	/* midi device table */
83 	int max_mididev;
84 
85 	/* synth device table */
86 	int max_synthdev;
87 	struct seq_oss_synthinfo synths[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
88 	int synth_opened;
89 
90 	/* output queue */
91 	struct seq_oss_writeq *writeq;
92 
93 	/* midi input queue */
94 	struct seq_oss_readq *readq;
95 
96 	/* timer */
97 	struct seq_oss_timer *timer;
98 };
99 
100 
101 /*
102  * function prototypes
103  */
104 
105 /* create/delete OSS sequencer client */
106 int snd_seq_oss_create_client(void);
107 int snd_seq_oss_delete_client(void);
108 
109 /* device file interface */
110 int snd_seq_oss_open(struct file *file, int level);
111 void snd_seq_oss_release(struct seq_oss_devinfo *dp);
112 int snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long arg);
113 int snd_seq_oss_read(struct seq_oss_devinfo *dev, char __user *buf, int count);
114 int snd_seq_oss_write(struct seq_oss_devinfo *dp, const char __user *buf, int count, struct file *opt);
115 __poll_t snd_seq_oss_poll(struct seq_oss_devinfo *dp, struct file *file, poll_table * wait);
116 
117 void snd_seq_oss_reset(struct seq_oss_devinfo *dp);
118 
119 /* */
120 void snd_seq_oss_process_queue(struct seq_oss_devinfo *dp, abstime_t time);
121 
122 
123 /* proc interface */
124 void snd_seq_oss_system_info_read(struct snd_info_buffer *buf);
125 void snd_seq_oss_midi_info_read(struct snd_info_buffer *buf);
126 void snd_seq_oss_synth_info_read(struct snd_info_buffer *buf);
127 void snd_seq_oss_readq_info_read(struct seq_oss_readq *q, struct snd_info_buffer *buf);
128 
129 /* file mode macros */
130 #define is_read_mode(mode)	((mode) & SNDRV_SEQ_OSS_FILE_READ)
131 #define is_write_mode(mode)	((mode) & SNDRV_SEQ_OSS_FILE_WRITE)
132 #define is_nonblock_mode(mode)	((mode) & SNDRV_SEQ_OSS_FILE_NONBLOCK)
133 
134 /* dispatch event */
135 static inline int
snd_seq_oss_dispatch(struct seq_oss_devinfo * dp,struct snd_seq_event * ev,int atomic,int hop)136 snd_seq_oss_dispatch(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int atomic, int hop)
137 {
138 	return snd_seq_kernel_client_dispatch(dp->cseq, ev, atomic, hop);
139 }
140 
141 /* ioctl for writeq */
142 static inline int
snd_seq_oss_control(struct seq_oss_devinfo * dp,unsigned int type,void * arg)143 snd_seq_oss_control(struct seq_oss_devinfo *dp, unsigned int type, void *arg)
144 {
145 	int err;
146 
147 	snd_seq_client_ioctl_lock(dp->cseq);
148 	err = snd_seq_kernel_client_ctl(dp->cseq, type, arg);
149 	snd_seq_client_ioctl_unlock(dp->cseq);
150 	return err;
151 }
152 
153 /* fill the addresses in header */
154 static inline void
snd_seq_oss_fill_addr(struct seq_oss_devinfo * dp,struct snd_seq_event * ev,int dest_client,int dest_port)155 snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,
156 		     int dest_client, int dest_port)
157 {
158 	ev->queue = dp->queue;
159 	ev->source = dp->addr;
160 	ev->dest.client = dest_client;
161 	ev->dest.port = dest_port;
162 }
163 
164 
165 /* misc. functions for proc interface */
166 char *enabled_str(int bool);
167 
168 #endif /* __SEQ_OSS_DEVICE_H */
169