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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@perex.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 <linux/mutex.h> |
30 | #include <linux/workqueue.h> |
31 | |
32 | #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) |
33 | #include <sound/seq_device.h> |
34 | #endif |
35 | |
36 | /* |
37 | * Raw MIDI interface |
38 | */ |
39 | |
40 | #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) |
46 | |
47 | struct snd_rawmidi; |
48 | struct snd_rawmidi_substream; |
49 | struct snd_seq_port_info; |
50 | struct pid; |
51 | |
52 | struct 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 | }; |
58 | |
59 | struct snd_rawmidi_global_ops { |
60 | int (*dev_register) (struct snd_rawmidi * rmidi); |
61 | int (*dev_unregister) (struct snd_rawmidi * rmidi); |
62 | void (*get_port_info)(struct snd_rawmidi *rmidi, int number, |
63 | struct snd_seq_port_info *info); |
64 | }; |
65 | |
66 | struct snd_rawmidi_runtime { |
67 | struct snd_rawmidi_substream *substream; |
68 | 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) */ |
82 | void (*event)(struct snd_rawmidi_substream *substream); |
83 | /* defers calls to event [input] or ops->trigger [output] */ |
84 | struct work_struct event_work; |
85 | /* private data */ |
86 | void *private_data; |
87 | void (*private_free)(struct snd_rawmidi_substream *substream); |
88 | }; |
89 | |
90 | struct snd_rawmidi_substream { |
91 | 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; |
99 | struct snd_rawmidi *rmidi; |
100 | struct snd_rawmidi_str *pstr; |
101 | char name[32]; |
102 | struct snd_rawmidi_runtime *runtime; |
103 | struct pid *pid; |
104 | /* hardware layer */ |
105 | struct snd_rawmidi_ops *ops; |
106 | }; |
107 | |
108 | struct snd_rawmidi_file { |
109 | struct snd_rawmidi *rmidi; |
110 | struct snd_rawmidi_substream *input; |
111 | struct snd_rawmidi_substream *output; |
112 | }; |
113 | |
114 | struct snd_rawmidi_str { |
115 | unsigned int substream_count; |
116 | unsigned int substream_opened; |
117 | struct list_head substreams; |
118 | }; |
119 | |
120 | struct snd_rawmidi { |
121 | struct snd_card *card; |
122 | struct list_head list; |
123 | 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 | |
132 | struct snd_rawmidi_global_ops *ops; |
133 | |
134 | struct snd_rawmidi_str streams[2]; |
135 | |
136 | void *private_data; |
137 | void (*private_free) (struct snd_rawmidi *rmidi); |
138 | |
139 | struct mutex open_mutex; |
140 | wait_queue_head_t open_wait; |
141 | |
142 | struct snd_info_entry *dev; |
143 | struct snd_info_entry *proc_entry; |
144 | |
145 | #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) |
146 | struct snd_seq_device *seq_dev; |
147 | #endif |
148 | }; |
149 | |
150 | /* main rawmidi functions */ |
151 | |
152 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
153 | int output_count, int input_count, |
154 | struct snd_rawmidi **rmidi); |
155 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
156 | struct snd_rawmidi_ops *ops); |
157 | |
158 | /* callbacks */ |
159 | |
160 | void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); |
161 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
162 | const unsigned char *buffer, int count); |
163 | void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); |
164 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); |
165 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
166 | unsigned char *buffer, int count); |
167 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); |
168 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
169 | unsigned char *buffer, int count); |
170 | |
171 | /* main midi functions */ |
172 | |
173 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); |
174 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
175 | int mode, struct snd_rawmidi_file *rfile); |
176 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); |
177 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
178 | struct snd_rawmidi_params *params); |
179 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
180 | struct snd_rawmidi_params *params); |
181 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); |
182 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); |
183 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); |
184 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
185 | unsigned char *buf, long count); |
186 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
187 | const unsigned char *buf, long count); |
188 | |
189 | #endif /* __SOUND_RAWMIDI_H */ |
190 |
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