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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 | |
c1017a4c | 6 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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> | |
1a60d4c5 | 29 | #include <linux/mutex.h> |
1da177e4 LT |
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) | |
1da177e4 | 45 | |
48c9d417 TI |
46 | struct snd_rawmidi; |
47 | struct snd_rawmidi_substream; | |
a7b928ac | 48 | struct snd_seq_port_info; |
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); | |
a7b928ac CL |
60 | void (*get_port_info)(struct snd_rawmidi *rmidi, int number, |
61 | struct snd_seq_port_info *info); | |
48c9d417 | 62 | }; |
1da177e4 | 63 | |
48c9d417 | 64 | struct snd_rawmidi_runtime { |
1da177e4 LT |
65 | unsigned int drain: 1, /* drain stage */ |
66 | oss: 1; /* OSS compatible mode */ | |
67 | /* midi stream buffer */ | |
68 | unsigned char *buffer; /* buffer for MIDI data */ | |
69 | size_t buffer_size; /* size of buffer */ | |
70 | size_t appl_ptr; /* application pointer */ | |
71 | size_t hw_ptr; /* hardware pointer */ | |
72 | size_t avail_min; /* min avail for wakeup */ | |
73 | size_t avail; /* max used buffer for wakeup */ | |
74 | size_t xruns; /* over/underruns counter */ | |
75 | /* misc */ | |
76 | spinlock_t lock; | |
77 | wait_queue_head_t sleep; | |
78 | /* event handler (new bytes, input only) */ | |
48c9d417 | 79 | void (*event)(struct snd_rawmidi_substream *substream); |
1da177e4 LT |
80 | /* defers calls to event [input] or ops->trigger [output] */ |
81 | struct tasklet_struct tasklet; | |
82 | /* private data */ | |
83 | void *private_data; | |
48c9d417 | 84 | void (*private_free)(struct snd_rawmidi_substream *substream); |
1da177e4 LT |
85 | }; |
86 | ||
48c9d417 | 87 | struct snd_rawmidi_substream { |
1da177e4 LT |
88 | struct list_head list; /* list of all substream for given stream */ |
89 | int stream; /* direction */ | |
90 | int number; /* substream number */ | |
91 | unsigned int opened: 1, /* open flag */ | |
92 | append: 1, /* append flag (merge more streams) */ | |
93 | active_sensing: 1; /* send active sensing when close */ | |
94 | int use_count; /* use counter (for output) */ | |
95 | size_t bytes; | |
48c9d417 TI |
96 | struct snd_rawmidi *rmidi; |
97 | struct snd_rawmidi_str *pstr; | |
1da177e4 | 98 | char name[32]; |
48c9d417 | 99 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 100 | /* hardware layer */ |
48c9d417 | 101 | struct snd_rawmidi_ops *ops; |
1da177e4 LT |
102 | }; |
103 | ||
48c9d417 TI |
104 | struct snd_rawmidi_file { |
105 | struct snd_rawmidi *rmidi; | |
106 | struct snd_rawmidi_substream *input; | |
107 | struct snd_rawmidi_substream *output; | |
108 | }; | |
1da177e4 | 109 | |
48c9d417 | 110 | struct snd_rawmidi_str { |
1da177e4 LT |
111 | unsigned int substream_count; |
112 | unsigned int substream_opened; | |
113 | struct list_head substreams; | |
114 | }; | |
115 | ||
48c9d417 TI |
116 | struct snd_rawmidi { |
117 | struct snd_card *card; | |
f87135f5 | 118 | struct list_head list; |
1da177e4 LT |
119 | unsigned int device; /* device number */ |
120 | unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ | |
121 | char id[64]; | |
122 | char name[80]; | |
123 | ||
124 | #ifdef CONFIG_SND_OSSEMUL | |
125 | int ossreg; | |
126 | #endif | |
127 | ||
48c9d417 | 128 | struct snd_rawmidi_global_ops *ops; |
1da177e4 | 129 | |
48c9d417 | 130 | struct snd_rawmidi_str streams[2]; |
1da177e4 LT |
131 | |
132 | void *private_data; | |
48c9d417 | 133 | void (*private_free) (struct snd_rawmidi *rmidi); |
1da177e4 | 134 | |
1a60d4c5 | 135 | struct mutex open_mutex; |
1da177e4 LT |
136 | wait_queue_head_t open_wait; |
137 | ||
48c9d417 TI |
138 | struct snd_info_entry *dev; |
139 | struct snd_info_entry *proc_entry; | |
1da177e4 LT |
140 | |
141 | #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) | |
48c9d417 | 142 | struct snd_seq_device *seq_dev; |
1da177e4 LT |
143 | #endif |
144 | }; | |
145 | ||
146 | /* main rawmidi functions */ | |
147 | ||
48c9d417 | 148 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 149 | int output_count, int input_count, |
48c9d417 TI |
150 | struct snd_rawmidi **rmidi); |
151 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, | |
152 | struct snd_rawmidi_ops *ops); | |
1da177e4 LT |
153 | |
154 | /* callbacks */ | |
155 | ||
48c9d417 TI |
156 | void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); |
157 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, | |
158 | const unsigned char *buffer, int count); | |
159 | void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); | |
160 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); | |
161 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, | |
162 | unsigned char *buffer, int count); | |
163 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); | |
164 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, | |
165 | unsigned char *buffer, int count); | |
1da177e4 LT |
166 | |
167 | /* main midi functions */ | |
168 | ||
48c9d417 | 169 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); |
f87135f5 CL |
170 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
171 | int mode, struct snd_rawmidi_file *rfile); | |
48c9d417 TI |
172 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); |
173 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, | |
174 | struct snd_rawmidi_params *params); | |
175 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, | |
176 | struct snd_rawmidi_params *params); | |
177 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); | |
178 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); | |
179 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); | |
180 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, | |
181 | unsigned char *buf, long count); | |
182 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, | |
183 | const unsigned char *buf, long count); | |
1da177e4 LT |
184 | |
185 | #endif /* __SOUND_RAWMIDI_H */ |