1 #ifndef __SOUND_RAWMIDI_H
2 #define __SOUND_RAWMIDI_H
3
4 /*
5 * Abstract layer for MIDI v1.0 stream
6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include <sound/asound.h>
26 #include <linux/interrupt.h>
27 #include <linux/spinlock.h>
28 #include <linux/wait.h>
29 #include <linux/mutex.h>
30
31 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
32 #include "seq_device.h"
33 #endif
34
35 /*
36 * Raw MIDI interface
37 */
38
39 #define SNDRV_RAWMIDI_DEVICES 8
40
41 #define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
42 #define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
43 #define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
44 #define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
45 #define SNDRV_RAWMIDI_LFLG_NOOPENLOCK (1<<3)
46
47 struct snd_rawmidi;
48 struct snd_rawmidi_substream;
49 struct snd_seq_port_info;
50
51 struct snd_rawmidi_ops {
52 int (*open) (struct snd_rawmidi_substream * substream);
53 int (*close) (struct snd_rawmidi_substream * substream);
54 void (*trigger) (struct snd_rawmidi_substream * substream, int up);
55 void (*drain) (struct snd_rawmidi_substream * substream);
56 };
57
58 struct snd_rawmidi_global_ops {
59 int (*dev_register) (struct snd_rawmidi * rmidi);
60 int (*dev_unregister) (struct snd_rawmidi * rmidi);
61 void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
62 struct snd_seq_port_info *info);
63 };
64
65 struct snd_rawmidi_runtime {
66 unsigned int drain: 1, /* drain stage */
67 oss: 1; /* OSS compatible mode */
68 /* midi stream buffer */
69 unsigned char *buffer; /* buffer for MIDI data */
70 size_t buffer_size; /* size of buffer */
71 size_t appl_ptr; /* application pointer */
72 size_t hw_ptr; /* hardware pointer */
73 size_t avail_min; /* min avail for wakeup */
74 size_t avail; /* max used buffer for wakeup */
75 size_t xruns; /* over/underruns counter */
76 /* misc */
77 spinlock_t lock;
78 wait_queue_head_t sleep;
79 /* event handler (new bytes, input only) */
80 void (*event)(struct snd_rawmidi_substream *substream);
81 /* defers calls to event [input] or ops->trigger [output] */
82 struct tasklet_struct tasklet;
83 /* private data */
84 void *private_data;
85 void (*private_free)(struct snd_rawmidi_substream *substream);
86 };
87
88 struct snd_rawmidi_substream {
89 struct list_head list; /* list of all substream for given stream */
90 int stream; /* direction */
91 int number; /* substream number */
92 unsigned int opened: 1, /* open flag */
93 append: 1, /* append flag (merge more streams) */
94 active_sensing: 1; /* send active sensing when close */
95 int use_count; /* use counter (for output) */
96 size_t bytes;
97 struct snd_rawmidi *rmidi;
98 struct snd_rawmidi_str *pstr;
99 char name[32];
100 struct snd_rawmidi_runtime *runtime;
101 /* hardware layer */
102 struct snd_rawmidi_ops *ops;
103 };
104
105 struct snd_rawmidi_file {
106 struct snd_rawmidi *rmidi;
107 struct snd_rawmidi_substream *input;
108 struct snd_rawmidi_substream *output;
109 };
110
111 struct snd_rawmidi_str {
112 unsigned int substream_count;
113 unsigned int substream_opened;
114 struct list_head substreams;
115 };
116
117 struct snd_rawmidi {
118 struct snd_card *card;
119 struct list_head list;
120 unsigned int device; /* device number */
121 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
122 char id[64];
123 char name[80];
124
125 #ifdef CONFIG_SND_OSSEMUL
126 int ossreg;
127 #endif
128
129 struct snd_rawmidi_global_ops *ops;
130
131 struct snd_rawmidi_str streams[2];
132
133 void *private_data;
134 void (*private_free) (struct snd_rawmidi *rmidi);
135
136 struct mutex open_mutex;
137 wait_queue_head_t open_wait;
138
139 struct snd_info_entry *dev;
140 struct snd_info_entry *proc_entry;
141
142 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
143 struct snd_seq_device *seq_dev;
144 #endif
145 };
146
147 /* main rawmidi functions */
148
149 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
150 int output_count, int input_count,
151 struct snd_rawmidi **rmidi);
152 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
153 struct snd_rawmidi_ops *ops);
154
155 /* callbacks */
156
157 void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream);
158 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
159 const unsigned char *buffer, int count);
160 void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream);
161 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
162 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
163 unsigned char *buffer, int count);
164 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
165 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
166 unsigned char *buffer, int count);
167
168 /* main midi functions */
169
170 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
171 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
172 int mode, struct snd_rawmidi_file *rfile);
173 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
174 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
175 struct snd_rawmidi_params *params);
176 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
177 struct snd_rawmidi_params *params);
178 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
179 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
180 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
181 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
182 unsigned char *buf, long count);
183 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
184 const unsigned char *buf, long count);
185
186 #endif /* __SOUND_RAWMIDI_H */
187
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