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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>
Takashi Iwaiaee50122015-01-29 17:55:52 +010031#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
David Howellsa1ce3922012-10-02 18:01:25 +010034#include <sound/seq_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#endif
36
37/*
38 * Raw MIDI interface
39 */
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define SNDRV_RAWMIDI_DEVICES 8
42
43#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
44#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
45#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
46#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Takashi Iwai48c9d412005-11-17 13:56:51 +010048struct snd_rawmidi;
49struct snd_rawmidi_substream;
Clemens Ladischa7b928a2006-05-02 16:22:12 +020050struct snd_seq_port_info;
Clemens Ladisch7584af12009-11-10 10:14:04 +010051struct pid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Takashi Iwai48c9d412005-11-17 13:56:51 +010053struct snd_rawmidi_ops {
54 int (*open) (struct snd_rawmidi_substream * substream);
55 int (*close) (struct snd_rawmidi_substream * substream);
56 void (*trigger) (struct snd_rawmidi_substream * substream, int up);
57 void (*drain) (struct snd_rawmidi_substream * substream);
58};
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Takashi Iwai48c9d412005-11-17 13:56:51 +010060struct snd_rawmidi_global_ops {
61 int (*dev_register) (struct snd_rawmidi * rmidi);
62 int (*dev_unregister) (struct snd_rawmidi * rmidi);
Clemens Ladischa7b928a2006-05-02 16:22:12 +020063 void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
64 struct snd_seq_port_info *info);
Takashi Iwai48c9d412005-11-17 13:56:51 +010065};
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Takashi Iwai48c9d412005-11-17 13:56:51 +010067struct snd_rawmidi_runtime {
Takashi Iwaib3c705a2011-06-14 14:37:06 +020068 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 unsigned int drain: 1, /* drain stage */
70 oss: 1; /* OSS compatible mode */
71 /* midi stream buffer */
72 unsigned char *buffer; /* buffer for MIDI data */
73 size_t buffer_size; /* size of buffer */
74 size_t appl_ptr; /* application pointer */
75 size_t hw_ptr; /* hardware pointer */
76 size_t avail_min; /* min avail for wakeup */
77 size_t avail; /* max used buffer for wakeup */
78 size_t xruns; /* over/underruns counter */
79 /* misc */
80 spinlock_t lock;
81 wait_queue_head_t sleep;
82 /* event handler (new bytes, input only) */
Takashi Iwai48c9d412005-11-17 13:56:51 +010083 void (*event)(struct snd_rawmidi_substream *substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 /* defers calls to event [input] or ops->trigger [output] */
Takashi Iwaib3c705a2011-06-14 14:37:06 +020085 struct work_struct event_work;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 /* private data */
87 void *private_data;
Takashi Iwai48c9d412005-11-17 13:56:51 +010088 void (*private_free)(struct snd_rawmidi_substream *substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089};
90
Takashi Iwai48c9d412005-11-17 13:56:51 +010091struct snd_rawmidi_substream {
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 struct list_head list; /* list of all substream for given stream */
93 int stream; /* direction */
94 int number; /* substream number */
95 unsigned int opened: 1, /* open flag */
96 append: 1, /* append flag (merge more streams) */
97 active_sensing: 1; /* send active sensing when close */
98 int use_count; /* use counter (for output) */
99 size_t bytes;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100100 struct snd_rawmidi *rmidi;
101 struct snd_rawmidi_str *pstr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 char name[32];
Takashi Iwai48c9d412005-11-17 13:56:51 +0100103 struct snd_rawmidi_runtime *runtime;
Clemens Ladisch7584af12009-11-10 10:14:04 +0100104 struct pid *pid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 /* hardware layer */
Takashi Iwai48c9d412005-11-17 13:56:51 +0100106 struct snd_rawmidi_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107};
108
Takashi Iwai48c9d412005-11-17 13:56:51 +0100109struct snd_rawmidi_file {
110 struct snd_rawmidi *rmidi;
111 struct snd_rawmidi_substream *input;
112 struct snd_rawmidi_substream *output;
113};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Takashi Iwai48c9d412005-11-17 13:56:51 +0100115struct snd_rawmidi_str {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 unsigned int substream_count;
117 unsigned int substream_opened;
118 struct list_head substreams;
119};
120
Takashi Iwai48c9d412005-11-17 13:56:51 +0100121struct snd_rawmidi {
122 struct snd_card *card;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100123 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 unsigned int device; /* device number */
125 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
126 char id[64];
127 char name[80];
128
129#ifdef CONFIG_SND_OSSEMUL
130 int ossreg;
131#endif
132
Julia Lawallefdbe3c2015-11-22 08:55:07 +0100133 const struct snd_rawmidi_global_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Takashi Iwai48c9d412005-11-17 13:56:51 +0100135 struct snd_rawmidi_str streams[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137 void *private_data;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100138 void (*private_free) (struct snd_rawmidi *rmidi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100140 struct mutex open_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 wait_queue_head_t open_wait;
142
Takashi Iwaiaee50122015-01-29 17:55:52 +0100143 struct device dev;
144
Takashi Iwai48c9d412005-11-17 13:56:51 +0100145 struct snd_info_entry *proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
Takashi Iwai48c9d412005-11-17 13:56:51 +0100148 struct snd_seq_device *seq_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#endif
150};
151
152/* main rawmidi functions */
153
Takashi Iwai48c9d412005-11-17 13:56:51 +0100154int snd_rawmidi_new(struct snd_card *card, char *id, int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 int output_count, int input_count,
Takashi Iwai48c9d412005-11-17 13:56:51 +0100156 struct snd_rawmidi **rmidi);
157void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
158 struct snd_rawmidi_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160/* callbacks */
161
Takashi Iwai48c9d412005-11-17 13:56:51 +0100162int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
163 const unsigned char *buffer, int count);
Takashi Iwai48c9d412005-11-17 13:56:51 +0100164int 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 */