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midi_pcppi.c revision 1.22 
      1 /*	$NetBSD: midi_pcppi.c,v 1.22 2009/04/08 00:12:27 dyoung 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 (at) 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 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: midi_pcppi.c,v 1.22 2009/04/08 00:12:27 dyoung Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/kernel.h>
     38 #include <sys/errno.h>
     39 #include <sys/device.h>
     40 #include <sys/malloc.h>
     41 #include <sys/proc.h>
     42 #include <sys/conf.h>
     43 #include <sys/select.h>
     44 #include <sys/audioio.h>
     45 #include <sys/midiio.h>
     46 
     47 #include <sys/bus.h>
     48 
     49 #include <dev/isa/pcppivar.h>
     50 
     51 #include <dev/audio_if.h>
     52 #include <dev/midi_if.h>
     53 #include <dev/midivar.h>
     54 #include <dev/midisynvar.h>
     55 
     56 #define MAX_DURATION 30		/* turn off sound automagically after 30 s */
     57 
     58 struct midi_pcppi_softc {
     59 	struct midi_softc sc_mididev;
     60 	midisyn sc_midisyn;
     61 };
     62 
     63 static int	midi_pcppi_match(device_t, cfdata_t , void *);
     64 static void	midi_pcppi_attach(device_t, device_t, void *);
     65 
     66 void	midi_pcppi_on   (midisyn *, uint_fast16_t, midipitch_t, int16_t);
     67 void	midi_pcppi_off  (midisyn *, uint_fast16_t, uint_fast8_t);
     68 void	midi_pcppi_close(midisyn *);
     69 static void midi_pcppi_repitchv(midisyn *, uint_fast16_t, midipitch_t);
     70 
     71 CFATTACH_DECL3_NEW(midi_pcppi, sizeof(struct midi_pcppi_softc),
     72     midi_pcppi_match, midi_pcppi_attach, mididetach, NULL, NULL, NULL,
     73     DVF_DETACH_SHUTDOWN);
     74 
     75 struct midisyn_methods midi_pcppi_hw = {
     76 	.close    = midi_pcppi_close,
     77 	.attackv  = midi_pcppi_on,
     78 	.releasev = midi_pcppi_off,
     79 	.repitchv = midi_pcppi_repitchv,
     80 };
     81 
     82 int midi_pcppi_attached = 0;	/* Not very nice */
     83 
     84 static int
     85 midi_pcppi_match(device_t parent, cfdata_t match, void *aux)
     86 {
     87 	return (!midi_pcppi_attached);
     88 }
     89 
     90 static void
     91 midi_pcppi_attach(device_t parent, device_t self, void *aux)
     92 {
     93 	struct midi_pcppi_softc *sc = device_private(self);
     94 	struct pcppi_attach_args *pa = (struct pcppi_attach_args *)aux;
     95 	midisyn *ms;
     96 
     97 	KASSERT(midi_pcppi_attached > 0);
     98 
     99 	midi_pcppi_attached--;
    100 
    101 	sc->sc_mididev.dev = self;
    102 	ms = &sc->sc_midisyn;
    103 	ms->mets = &midi_pcppi_hw;
    104 	strcpy(ms->name, "PC speaker");
    105 	ms->nvoice = 1;
    106 	ms->data = pa->pa_cookie;
    107 
    108 	midi_pcppi_attached++;
    109 
    110 	midisyn_attach(&sc->sc_mididev, ms);
    111 	midi_attach(&sc->sc_mididev, parent);
    112         if (!device_pmf_is_registered(self))
    113 		if (!pmf_device_register(self, NULL, NULL))
    114 			aprint_error_dev(self,
    115 			    "couldn't establish power handler\n");
    116 }
    117 
    118 void
    119 midi_pcppi_on(midisyn *ms,
    120     uint_fast16_t voice, midipitch_t mp, int16_t level)
    121 {
    122 	pcppi_tag_t t = ms->data;
    123 
    124 	pcppi_bell(t,
    125 	           MIDIHZ18_TO_HZ(MIDIPITCH_TO_HZ18(mp)),
    126 	           MAX_DURATION * hz, 0);
    127 }
    128 
    129 void
    130 midi_pcppi_off(midisyn *ms, uint_fast16_t voice, uint_fast8_t vel)
    131 {
    132 	pcppi_tag_t t = ms->data;
    133 
    134 	/*printf("OFF %p %d\n", t, note >> 16);*/
    135 	pcppi_bell(t, 0, 0, 0);
    136 }
    137 
    138 void
    139 midi_pcppi_close(midisyn *ms)
    140 {
    141 	pcppi_tag_t t = ms->data;
    142 
    143 	/* Make sure we are quiet. */
    144 	pcppi_bell(t, 0, 0, 0);
    145 }
    146 
    147 static void
    148 midi_pcppi_repitchv(midisyn *ms, uint_fast16_t voice, midipitch_t newpitch)
    149 {
    150 	midi_pcppi_on(ms, voice, newpitch, 64);
    151 }
    152