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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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@suse.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>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010029#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#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
Takashi Iwai48c9d412005-11-17 13:56:51 +010047struct snd_rawmidi;
48struct snd_rawmidi_substream;
Clemens Ladischa7b928a2006-05-02 16:22:12 +020049struct snd_seq_port_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Takashi Iwai48c9d412005-11-17 13:56:51 +010051struct 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};
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Takashi Iwai48c9d412005-11-17 13:56:51 +010058struct snd_rawmidi_global_ops {
59 int (*dev_register) (struct snd_rawmidi * rmidi);
60 int (*dev_unregister) (struct snd_rawmidi * rmidi);
Clemens Ladischa7b928a2006-05-02 16:22:12 +020061 void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
62 struct snd_seq_port_info *info);
Takashi Iwai48c9d412005-11-17 13:56:51 +010063};
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Takashi Iwai48c9d412005-11-17 13:56:51 +010065struct snd_rawmidi_runtime {
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 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) */
Takashi Iwai48c9d412005-11-17 13:56:51 +010080 void (*event)(struct snd_rawmidi_substream *substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 /* defers calls to event [input] or ops->trigger [output] */
82 struct tasklet_struct tasklet;
83 /* private data */
84 void *private_data;
Takashi Iwai48c9d412005-11-17 13:56:51 +010085 void (*private_free)(struct snd_rawmidi_substream *substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086};
87
Takashi Iwai48c9d412005-11-17 13:56:51 +010088struct snd_rawmidi_substream {
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 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;
Takashi Iwai48c9d412005-11-17 13:56:51 +010097 struct snd_rawmidi *rmidi;
98 struct snd_rawmidi_str *pstr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 char name[32];
Takashi Iwai48c9d412005-11-17 13:56:51 +0100100 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 /* hardware layer */
Takashi Iwai48c9d412005-11-17 13:56:51 +0100102 struct snd_rawmidi_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103};
104
Takashi Iwai48c9d412005-11-17 13:56:51 +0100105struct snd_rawmidi_file {
106 struct snd_rawmidi *rmidi;
107 struct snd_rawmidi_substream *input;
108 struct snd_rawmidi_substream *output;
109};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Takashi Iwai48c9d412005-11-17 13:56:51 +0100111struct snd_rawmidi_str {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 unsigned int substream_count;
113 unsigned int substream_opened;
114 struct list_head substreams;
115};
116
Takashi Iwai48c9d412005-11-17 13:56:51 +0100117struct snd_rawmidi {
118 struct snd_card *card;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100119 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 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
Takashi Iwai48c9d412005-11-17 13:56:51 +0100129 struct snd_rawmidi_global_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Takashi Iwai48c9d412005-11-17 13:56:51 +0100131 struct snd_rawmidi_str streams[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133 void *private_data;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100134 void (*private_free) (struct snd_rawmidi *rmidi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100136 struct mutex open_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 wait_queue_head_t open_wait;
138
Takashi Iwai48c9d412005-11-17 13:56:51 +0100139 struct snd_info_entry *dev;
140 struct snd_info_entry *proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
Takashi Iwai48c9d412005-11-17 13:56:51 +0100143 struct snd_seq_device *seq_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144#endif
145};
146
147/* main rawmidi functions */
148
Takashi Iwai48c9d412005-11-17 13:56:51 +0100149int snd_rawmidi_new(struct snd_card *card, char *id, int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 int output_count, int input_count,
Takashi Iwai48c9d412005-11-17 13:56:51 +0100151 struct snd_rawmidi **rmidi);
152void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
153 struct snd_rawmidi_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155/* callbacks */
156
Takashi Iwai48c9d412005-11-17 13:56:51 +0100157void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream);
158int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
159 const unsigned char *buffer, int count);
160void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream);
161int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
162int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
163 unsigned char *buffer, int count);
164int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
165int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
166 unsigned char *buffer, int count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168/* main midi functions */
169
Takashi Iwai48c9d412005-11-17 13:56:51 +0100170int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100171int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
172 int mode, struct snd_rawmidi_file *rfile);
Takashi Iwai48c9d412005-11-17 13:56:51 +0100173int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
174int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
175 struct snd_rawmidi_params *params);
176int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
177 struct snd_rawmidi_params *params);
178int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
179int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
180int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
181long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
182 unsigned char *buf, long count);
183long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
184 const unsigned char *buf, long count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186#endif /* __SOUND_RAWMIDI_H */