1 | /* $NetBSD: midi_if.h,v 1.27 2015/03/01 00:34:14 mrg Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1998 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Lennart Augustsson (augustss@NetBSD.org). |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _SYS_DEV_MIDI_IF_H_ |
33 | #define _SYS_DEV_MIDI_IF_H_ |
34 | |
35 | #include <sys/mutex.h> |
36 | |
37 | struct midi_info { |
38 | const char *name; /* Name of MIDI hardware */ |
39 | int props; |
40 | }; |
41 | #define MIDI_PROP_OUT_INTR 1 |
42 | #define MIDI_PROP_CAN_INPUT 2 |
43 | #define MIDI_PROP_NO_OUTPUT 4 |
44 | |
45 | /* |
46 | * XXX expand |
47 | * |
48 | * List of hardware interface methods, and when locks are held by each |
49 | * called by this module: |
50 | * |
51 | * METHOD INTR NOTES |
52 | * ----------------------- ------- ------------------------- |
53 | * open - |
54 | * close - |
55 | * output - |
56 | * getinfo - Called at attach time |
57 | * ioctl - |
58 | * get_locks - Called at attach time |
59 | */ |
60 | |
61 | struct midi_softc; |
62 | |
63 | struct midi_hw_if { |
64 | int (*open)(void *, int, /* open hardware */ |
65 | void (*)(void *, int), /* input callback */ |
66 | void (*)(void *), /* output callback */ |
67 | void *); |
68 | void (*close)(void *); /* close hardware */ |
69 | int (*output)(void *, int); /* output a byte */ |
70 | void (*getinfo)(void *, struct midi_info *); |
71 | int (*ioctl)(void *, u_long, void *, int, struct lwp *); |
72 | void (*get_locks)(void *, kmutex_t **, kmutex_t **); |
73 | }; |
74 | |
75 | /* |
76 | * The extended hardware interface is for use by drivers that are better off |
77 | * getting messages whole to transmit, rather than byte-by-byte through |
78 | * output(). Two examples are midisyn (which interprets MIDI messages in |
79 | * software to drive synth chips) and umidi (which has to send messages in the |
80 | * packet-based USB MIDI protocol). It is silly for them to have to reassemble |
81 | * messages midi had to split up to poke through the single-byte interface. |
82 | * |
83 | * To register use of the extended interface, a driver will call back midi's |
84 | * midi_register_hw_if_ext() function during getinfo(); thereafter midi will |
85 | * deliver channel messages, system common messages other than sysex, and sysex |
86 | * messages, respectively, through these methods, and use the original output |
87 | * method only for system realtime messages (all of which are single byte). |
88 | * Other drivers that have no reason to change from the single-byte interface |
89 | * simply don't call the register function, and nothing changes for them. |
90 | * |
91 | * IMPORTANT: any code that provides a midi_hw_if_ext struct MUST initialize |
92 | * its members BY NAME (typically with a C99-style initializer with designators) |
93 | * and assure that any unused members contain zeroes (which is what C99 |
94 | * initializers will do), and make no assumptions about the size or order of |
95 | * the struct, to allow for further extension of this interface as needed. |
96 | */ |
97 | struct midi_hw_if_ext { |
98 | int (*channel)(void *, int, int, u_char *, int); |
99 | int (*common)(void *, int, u_char *, int); |
100 | int (*sysex)(void *, u_char *, int); |
101 | int compress:1; /* if hw wants channel msgs in compressed form */ |
102 | }; |
103 | void midi_register_hw_if_ext(struct midi_hw_if_ext *); |
104 | |
105 | void midi_attach(struct midi_softc *); |
106 | int mididetach(device_t, int); |
107 | device_t midi_attach_mi(const struct midi_hw_if *, void *, device_t); |
108 | |
109 | int midi_unit_count(void); |
110 | void midi_getinfo(dev_t, struct midi_info *); |
111 | int midi_writebytes(int, u_char *, int); |
112 | |
113 | #if !defined(IPL_AUDIO) |
114 | #define splaudio splbio /* XXX */ |
115 | #define IPL_AUDIO IPL_BIO /* XXX */ |
116 | #endif |
117 | |
118 | #endif /* _SYS_DEV_MIDI_IF_H_ */ |
119 | |