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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
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02006 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
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>
Takashi Iwaib3c705a2011-06-14 14:37:06 +020030#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
33#include "seq_device.h"
34#endif
35
36/*
37 * Raw MIDI interface
38 */
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define SNDRV_RAWMIDI_DEVICES 8
41
42#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
43#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
44#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
45#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
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;
Clemens Ladisch7584af12009-11-10 10:14:04 +010050struct pid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Takashi Iwai48c9d412005-11-17 13:56:51 +010052struct snd_rawmidi_ops {
53 int (*open) (struct snd_rawmidi_substream * substream);
54 int (*close) (struct snd_rawmidi_substream * substream);
55 void (*trigger) (struct snd_rawmidi_substream * substream, int up);
56 void (*drain) (struct snd_rawmidi_substream * substream);
57};
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Takashi Iwai48c9d412005-11-17 13:56:51 +010059struct snd_rawmidi_global_ops {
60 int (*dev_register) (struct snd_rawmidi * rmidi);
61 int (*dev_unregister) (struct snd_rawmidi * rmidi);
Clemens Ladischa7b928a2006-05-02 16:22:12 +020062 void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
63 struct snd_seq_port_info *info);
Takashi Iwai48c9d412005-11-17 13:56:51 +010064};
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Takashi Iwai48c9d412005-11-17 13:56:51 +010066struct snd_rawmidi_runtime {
Takashi Iwaib3c705a2011-06-14 14:37:06 +020067 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 unsigned int drain: 1, /* drain stage */
69 oss: 1; /* OSS compatible mode */
70 /* midi stream buffer */
71 unsigned char *buffer; /* buffer for MIDI data */
72 size_t buffer_size; /* size of buffer */
73 size_t appl_ptr; /* application pointer */
74 size_t hw_ptr; /* hardware pointer */
75 size_t avail_min; /* min avail for wakeup */
76 size_t avail; /* max used buffer for wakeup */
77 size_t xruns; /* over/underruns counter */
78 /* misc */
79 spinlock_t lock;
80 wait_queue_head_t sleep;
81 /* event handler (new bytes, input only) */
Takashi Iwai48c9d412005-11-17 13:56:51 +010082 void (*event)(struct snd_rawmidi_substream *substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 /* defers calls to event [input] or ops->trigger [output] */
Takashi Iwaib3c705a2011-06-14 14:37:06 +020084 struct work_struct event_work;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 /* private data */
86 void *private_data;
Takashi Iwai48c9d412005-11-17 13:56:51 +010087 void (*private_free)(struct snd_rawmidi_substream *substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088};
89
Takashi Iwai48c9d412005-11-17 13:56:51 +010090struct snd_rawmidi_substream {
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 struct list_head list; /* list of all substream for given stream */
92 int stream; /* direction */
93 int number; /* substream number */
94 unsigned int opened: 1, /* open flag */
95 append: 1, /* append flag (merge more streams) */
96 active_sensing: 1; /* send active sensing when close */
97 int use_count; /* use counter (for output) */
98 size_t bytes;
Takashi Iwai48c9d412005-11-17 13:56:51 +010099 struct snd_rawmidi *rmidi;
100 struct snd_rawmidi_str *pstr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 char name[32];
Takashi Iwai48c9d412005-11-17 13:56:51 +0100102 struct snd_rawmidi_runtime *runtime;
Clemens Ladisch7584af12009-11-10 10:14:04 +0100103 struct pid *pid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 /* hardware layer */
Takashi Iwai48c9d412005-11-17 13:56:51 +0100105 struct snd_rawmidi_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106};
107
Takashi Iwai48c9d412005-11-17 13:56:51 +0100108struct snd_rawmidi_file {
109 struct snd_rawmidi *rmidi;
110 struct snd_rawmidi_substream *input;
111 struct snd_rawmidi_substream *output;
112};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Takashi Iwai48c9d412005-11-17 13:56:51 +0100114struct snd_rawmidi_str {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 unsigned int substream_count;
116 unsigned int substream_opened;
117 struct list_head substreams;
118};
119
Takashi Iwai48c9d412005-11-17 13:56:51 +0100120struct snd_rawmidi {
121 struct snd_card *card;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100122 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 unsigned int device; /* device number */
124 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
125 char id[64];
126 char name[80];
127
128#ifdef CONFIG_SND_OSSEMUL
129 int ossreg;
130#endif
131
Takashi Iwai48c9d412005-11-17 13:56:51 +0100132 struct snd_rawmidi_global_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Takashi Iwai48c9d412005-11-17 13:56:51 +0100134 struct snd_rawmidi_str streams[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
136 void *private_data;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100137 void (*private_free) (struct snd_rawmidi *rmidi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100139 struct mutex open_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 wait_queue_head_t open_wait;
141
Takashi Iwai48c9d412005-11-17 13:56:51 +0100142 struct snd_info_entry *dev;
143 struct snd_info_entry *proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
Takashi Iwai48c9d412005-11-17 13:56:51 +0100146 struct snd_seq_device *seq_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147#endif
148};
149
150/* main rawmidi functions */
151
Takashi Iwai48c9d412005-11-17 13:56:51 +0100152int snd_rawmidi_new(struct snd_card *card, char *id, int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 int output_count, int input_count,
Takashi Iwai48c9d412005-11-17 13:56:51 +0100154 struct snd_rawmidi **rmidi);
155void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
156 struct snd_rawmidi_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158/* callbacks */
159
Takashi Iwai48c9d412005-11-17 13:56:51 +0100160void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream);
161int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
162 const unsigned char *buffer, int count);
163void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream);
164int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
165int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
166 unsigned char *buffer, int count);
167int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
168int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
169 unsigned char *buffer, int count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171/* main midi functions */
172
Takashi Iwai48c9d412005-11-17 13:56:51 +0100173int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100174int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
175 int mode, struct snd_rawmidi_file *rfile);
Takashi Iwai48c9d412005-11-17 13:56:51 +0100176int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
177int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
178 struct snd_rawmidi_params *params);
179int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
180 struct snd_rawmidi_params *params);
181int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
182int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
183int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
184long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
185 unsigned char *buf, long count);
186long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
187 const unsigned char *buf, long count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
189#endif /* __SOUND_RAWMIDI_H */