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1da177e4 LT |
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@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> | |
29 | #include <asm/semaphore.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 | ||
1da177e4 LT |
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 | ||
48c9d417 TI |
47 | struct snd_rawmidi; |
48 | struct snd_rawmidi_substream; | |
1da177e4 | 49 | |
48c9d417 TI |
50 | struct snd_rawmidi_ops { |
51 | int (*open) (struct snd_rawmidi_substream * substream); | |
52 | int (*close) (struct snd_rawmidi_substream * substream); | |
53 | void (*trigger) (struct snd_rawmidi_substream * substream, int up); | |
54 | void (*drain) (struct snd_rawmidi_substream * substream); | |
55 | }; | |
1da177e4 | 56 | |
48c9d417 TI |
57 | struct snd_rawmidi_global_ops { |
58 | int (*dev_register) (struct snd_rawmidi * rmidi); | |
59 | int (*dev_unregister) (struct snd_rawmidi * rmidi); | |
60 | }; | |
1da177e4 | 61 | |
48c9d417 | 62 | struct snd_rawmidi_runtime { |
1da177e4 LT |
63 | unsigned int drain: 1, /* drain stage */ |
64 | oss: 1; /* OSS compatible mode */ | |
65 | /* midi stream buffer */ | |
66 | unsigned char *buffer; /* buffer for MIDI data */ | |
67 | size_t buffer_size; /* size of buffer */ | |
68 | size_t appl_ptr; /* application pointer */ | |
69 | size_t hw_ptr; /* hardware pointer */ | |
70 | size_t avail_min; /* min avail for wakeup */ | |
71 | size_t avail; /* max used buffer for wakeup */ | |
72 | size_t xruns; /* over/underruns counter */ | |
73 | /* misc */ | |
74 | spinlock_t lock; | |
75 | wait_queue_head_t sleep; | |
76 | /* event handler (new bytes, input only) */ | |
48c9d417 | 77 | void (*event)(struct snd_rawmidi_substream *substream); |
1da177e4 LT |
78 | /* defers calls to event [input] or ops->trigger [output] */ |
79 | struct tasklet_struct tasklet; | |
80 | /* private data */ | |
81 | void *private_data; | |
48c9d417 | 82 | void (*private_free)(struct snd_rawmidi_substream *substream); |
1da177e4 LT |
83 | }; |
84 | ||
48c9d417 | 85 | struct snd_rawmidi_substream { |
1da177e4 LT |
86 | struct list_head list; /* list of all substream for given stream */ |
87 | int stream; /* direction */ | |
88 | int number; /* substream number */ | |
89 | unsigned int opened: 1, /* open flag */ | |
90 | append: 1, /* append flag (merge more streams) */ | |
91 | active_sensing: 1; /* send active sensing when close */ | |
92 | int use_count; /* use counter (for output) */ | |
93 | size_t bytes; | |
48c9d417 TI |
94 | struct snd_rawmidi *rmidi; |
95 | struct snd_rawmidi_str *pstr; | |
1da177e4 | 96 | char name[32]; |
48c9d417 | 97 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 98 | /* hardware layer */ |
48c9d417 | 99 | struct snd_rawmidi_ops *ops; |
1da177e4 LT |
100 | }; |
101 | ||
48c9d417 TI |
102 | struct snd_rawmidi_file { |
103 | struct snd_rawmidi *rmidi; | |
104 | struct snd_rawmidi_substream *input; | |
105 | struct snd_rawmidi_substream *output; | |
106 | }; | |
1da177e4 | 107 | |
48c9d417 | 108 | struct snd_rawmidi_str { |
1da177e4 LT |
109 | unsigned int substream_count; |
110 | unsigned int substream_opened; | |
111 | struct list_head substreams; | |
112 | }; | |
113 | ||
48c9d417 TI |
114 | struct snd_rawmidi { |
115 | struct snd_card *card; | |
1da177e4 LT |
116 | |
117 | unsigned int device; /* device number */ | |
118 | unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ | |
119 | char id[64]; | |
120 | char name[80]; | |
121 | ||
122 | #ifdef CONFIG_SND_OSSEMUL | |
123 | int ossreg; | |
124 | #endif | |
125 | ||
48c9d417 | 126 | struct snd_rawmidi_global_ops *ops; |
1da177e4 | 127 | |
48c9d417 | 128 | struct snd_rawmidi_str streams[2]; |
1da177e4 LT |
129 | |
130 | void *private_data; | |
48c9d417 | 131 | void (*private_free) (struct snd_rawmidi *rmidi); |
1da177e4 LT |
132 | |
133 | struct semaphore open_mutex; | |
134 | wait_queue_head_t open_wait; | |
135 | ||
48c9d417 TI |
136 | struct snd_info_entry *dev; |
137 | struct snd_info_entry *proc_entry; | |
1da177e4 LT |
138 | |
139 | #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) | |
48c9d417 | 140 | struct snd_seq_device *seq_dev; |
1da177e4 LT |
141 | #endif |
142 | }; | |
143 | ||
144 | /* main rawmidi functions */ | |
145 | ||
48c9d417 | 146 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 147 | int output_count, int input_count, |
48c9d417 TI |
148 | struct snd_rawmidi **rmidi); |
149 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, | |
150 | struct snd_rawmidi_ops *ops); | |
1da177e4 LT |
151 | |
152 | /* callbacks */ | |
153 | ||
48c9d417 TI |
154 | void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); |
155 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, | |
156 | const unsigned char *buffer, int count); | |
157 | void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); | |
158 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); | |
159 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, | |
160 | unsigned char *buffer, int count); | |
161 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); | |
162 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, | |
163 | unsigned char *buffer, int count); | |
1da177e4 LT |
164 | |
165 | /* main midi functions */ | |
166 | ||
48c9d417 TI |
167 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); |
168 | int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, int mode, | |
169 | struct snd_rawmidi_file *rfile); | |
170 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); | |
171 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, | |
172 | struct snd_rawmidi_params *params); | |
173 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, | |
174 | struct snd_rawmidi_params *params); | |
175 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); | |
176 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); | |
177 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); | |
178 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, | |
179 | unsigned char *buf, long count); | |
180 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, | |
181 | const unsigned char *buf, long count); | |
1da177e4 LT |
182 | |
183 | #endif /* __SOUND_RAWMIDI_H */ |