119 lines
4.6 KiB
C
119 lines
4.6 KiB
C
/* $NetBSD: midi_if.h,v 1.27 2015/03/01 00:34:14 mrg Exp $ */
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/*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (augustss@NetBSD.org).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_DEV_MIDI_IF_H_
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#define _SYS_DEV_MIDI_IF_H_
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#include <sys/mutex.h>
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struct midi_info {
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const char *name; /* Name of MIDI hardware */
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int props;
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};
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#define MIDI_PROP_OUT_INTR 1
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#define MIDI_PROP_CAN_INPUT 2
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#define MIDI_PROP_NO_OUTPUT 4
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/*
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* XXX expand
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*
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* List of hardware interface methods, and when locks are held by each
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* called by this module:
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*
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* METHOD INTR NOTES
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* ----------------------- ------- -------------------------
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* open -
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* close -
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* output -
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* getinfo - Called at attach time
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* ioctl -
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* get_locks - Called at attach time
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*/
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struct midi_softc;
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struct midi_hw_if {
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int (*open)(void *, int, /* open hardware */
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void (*)(void *, int), /* input callback */
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void (*)(void *), /* output callback */
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void *);
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void (*close)(void *); /* close hardware */
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int (*output)(void *, int); /* output a byte */
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void (*getinfo)(void *, struct midi_info *);
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int (*ioctl)(void *, u_long, void *, int, struct lwp *);
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void (*get_locks)(void *, kmutex_t **, kmutex_t **);
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};
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/*
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* The extended hardware interface is for use by drivers that are better off
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* getting messages whole to transmit, rather than byte-by-byte through
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* output(). Two examples are midisyn (which interprets MIDI messages in
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* software to drive synth chips) and umidi (which has to send messages in the
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* packet-based USB MIDI protocol). It is silly for them to have to reassemble
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* messages midi had to split up to poke through the single-byte interface.
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*
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* To register use of the extended interface, a driver will call back midi's
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* midi_register_hw_if_ext() function during getinfo(); thereafter midi will
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* deliver channel messages, system common messages other than sysex, and sysex
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* messages, respectively, through these methods, and use the original output
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* method only for system realtime messages (all of which are single byte).
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* Other drivers that have no reason to change from the single-byte interface
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* simply don't call the register function, and nothing changes for them.
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*
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* IMPORTANT: any code that provides a midi_hw_if_ext struct MUST initialize
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* its members BY NAME (typically with a C99-style initializer with designators)
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* and assure that any unused members contain zeroes (which is what C99
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* initializers will do), and make no assumptions about the size or order of
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* the struct, to allow for further extension of this interface as needed.
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*/
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struct midi_hw_if_ext {
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int (*channel)(void *, int, int, u_char *, int);
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int (*common)(void *, int, u_char *, int);
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int (*sysex)(void *, u_char *, int);
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int compress:1; /* if hw wants channel msgs in compressed form */
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};
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void midi_register_hw_if_ext(struct midi_hw_if_ext *);
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void midi_attach(struct midi_softc *);
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int mididetach(device_t, int);
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device_t midi_attach_mi(const struct midi_hw_if *, void *, device_t);
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int midi_unit_count(void);
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void midi_getinfo(dev_t, struct midi_info *);
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int midi_writebytes(int, u_char *, int);
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#if !defined(IPL_AUDIO)
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#define splaudio splbio /* XXX */
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#define IPL_AUDIO IPL_BIO /* XXX */
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#endif
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#endif /* _SYS_DEV_MIDI_IF_H_ */
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