NetBSD/sys/dev/isa/cms.c

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/* $NetBSD: cms.c,v 1.1 2000/05/01 22:48:33 augustss Exp $ */
/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "cms.h"
#if NCMS > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/select.h>
#include <machine/bus.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/audiovar.h>
#include <sys/midiio.h>
#include <dev/midi_if.h>
#include <dev/midivar.h>
#include <dev/midisynvar.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/isa/cmsreg.h>
#ifdef AUDIO_DEBUG
#define DPRINTF(x) if (cmsdebug) printf x
int cmsdebug = 0;
#else
#define DPRINTF(x)
#endif
struct cms_softc {
struct midi_softc sc_mididev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
/* shadow registers for each chip */
u_int8_t sc_shadowregs[32*2];
midisyn sc_midisyn;
};
int cms_probe __P((struct device *, struct cfdata *, void *));
void cms_attach __P((struct device *, struct device *, void *));
struct cfattach cms_ca = {
sizeof(struct cms_softc), cms_probe, cms_attach,
};
int cms_open __P((midisyn *, int));
void cms_close __P((midisyn *));
void cms_on __P((midisyn *, u_int32_t, u_int32_t, u_int32_t));
void cms_off __P((midisyn *, u_int32_t, u_int32_t, u_int32_t));
struct midisyn_methods midi_cms_hw = {
cms_open, /* open */
cms_close, /* close */
0, /* ioctl */
0, /* allocv */
cms_on, /* noteon */
cms_off, /* noteoff */
0, /* keypres */
0, /* ctlchg */
0, /* pgmchg */
0, /* chnpres */
0, /* pitchb */
0, /* sysex */
};
static void cms_reset __P((struct cms_softc *));
static char cms_note_table[] = {
/* A */ 3,
/* A# */ 31,
/* B */ 58,
/* C */ 83,
/* C# */ 107,
/* D */ 130,
/* D# */ 151,
/* E */ 172,
/* F */ 191,
/* F# */ 209,
/* G */ 226,
/* G# */ 242,
};
#define NOTE_TO_OCTAVE(note) (((note)-CMS_FIRST_NOTE)/12)
#define NOTE_TO_COUNT(note) cms_note_table[(((note)-CMS_FIRST_NOTE)%12)]
int
cms_probe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
int found = 0;
int i;
DPRINTF(("cms_probe():\n"));
iot = ia->ia_iot;
if (ia->ia_iobase == IOBASEUNK)
return 0;
if (bus_space_map(iot, ia->ia_iobase, CMS_IOSIZE, 0, &ioh))
return 0;
bus_space_write_1(iot, ioh, CMS_WREG, 0xaa);
if (bus_space_read_1(iot, ioh, CMS_RREG) != 0xaa)
goto out;
for (i = 0; i < 8; i++) {
if (bus_space_read_1(iot, ioh, CMS_MREG) != 0x7f)
goto out;
}
found = 1;
ia->ia_iosize = CMS_IOSIZE;
out:
bus_space_unmap(iot, ioh, CMS_IOSIZE);
return found;
}
void
cms_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct cms_softc *sc = (struct cms_softc *)self;
struct isa_attach_args *ia = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
midisyn *ms;
struct audio_attach_args arg;
printf("\n");
DPRINTF(("cms_attach():\n"));
iot = ia->ia_iot;
if (bus_space_map(iot, ia->ia_iobase, CMS_IOSIZE, 0, &ioh)) {
printf(": can't map i/o space\n");
return;
}
sc->sc_iot = iot;
sc->sc_ioh = ioh;
/* now let's reset the chips */
cms_reset(sc);
ms = &sc->sc_midisyn;
ms->mets = &midi_cms_hw;
strcpy(ms->name, "Creative Music System");
ms->nvoice = CMS_NVOICES;
ms->flags = MS_DOALLOC;
ms->data = sc;
/* use the synthesiser */
midisyn_attach(&sc->sc_mididev, ms);
/* now attach the midi device to the synthesiser */
arg.type = AUDIODEV_TYPE_MIDI;
arg.hwif = sc->sc_mididev.hw_if;
arg.hdl = sc->sc_mididev.hw_hdl;
config_found((struct device *)&sc->sc_mididev, &arg, 0);
}
int
cms_open(ms,flag)
midisyn *ms;
int flag;
{
struct cms_softc *sc = (struct cms_softc *)ms->data;
cms_reset(sc);
return 0;
}
void
cms_close(ms)
midisyn *ms;
{
struct cms_softc *sc = (struct cms_softc *)ms->data;
cms_reset(sc);
}
void
cms_on(ms, chan, note, vel)
midisyn *ms;
u_int32_t chan;
u_int32_t note;
u_int32_t vel;
{
struct cms_softc *sc = (struct cms_softc *)ms->data;
int chip = CHAN_TO_CHIP(chan);
int voice = CHAN_TO_VOICE(chan);
u_int8_t octave;
u_int8_t count;
u_int8_t reg;
u_int8_t vol;
if (note < CMS_FIRST_NOTE)
return;
octave = NOTE_TO_OCTAVE(note);
count = NOTE_TO_COUNT(note);
DPRINTF(("chip=%d voice=%d octave=%d count=%d offset=%d shift=%d\n",
chip, voice, octave, count, OCTAVE_OFFSET(voice),
OCTAVE_SHIFT(voice)));
/* write the count */
CMS_WRITE(sc, chip, CMS_IREG_FREQ0 + voice, count);
/* select the octave */
reg = CMS_READ(sc, chip, CMS_IREG_OCTAVE_1_0 + OCTAVE_OFFSET(voice));
reg &= ~(0x0f<<OCTAVE_SHIFT(voice));
reg |= ((octave&0x7)<<OCTAVE_SHIFT(voice));
CMS_WRITE(sc, chip, CMS_IREG_OCTAVE_1_0 + OCTAVE_OFFSET(voice), reg);
/* set the volume */
vol = (vel>>3)&0x0f;
CMS_WRITE(sc, chip, CMS_IREG_VOL0 + voice, ((vol<<4)|vol));
/* enable the voice */
reg = CMS_READ(sc, chip, CMS_IREG_FREQ_CTL);
reg |= (1<<voice);
CMS_WRITE(sc, chip, CMS_IREG_FREQ_CTL, reg);
}
void
cms_off(ms, chan, note, vel)
midisyn *ms;
u_int32_t chan;
u_int32_t note;
u_int32_t vel;
{
struct cms_softc *sc = (struct cms_softc *)ms->data;
int chip = CHAN_TO_CHIP(chan);
int voice = CHAN_TO_VOICE(chan);
u_int8_t reg;
if (note < CMS_FIRST_NOTE)
return;
/* disable the channel */
reg = CMS_READ(sc, chip, CMS_IREG_FREQ_CTL);
reg &= ~(1<<voice);
CMS_WRITE(sc, chip, CMS_IREG_FREQ_CTL, reg);
}
static void
cms_reset(sc)
struct cms_softc *sc;
{
int i;
DPRINTF(("cms_reset():\n"));
for (i = 0; i < 6; i++) {
CMS_WRITE(sc, 0, CMS_IREG_VOL0+i, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_VOL0+i, 0x00);
CMS_WRITE(sc, 0, CMS_IREG_FREQ0+i, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_FREQ0+i, 0x00);
}
for (i = 0; i < 3; i++) {
CMS_WRITE(sc, 0, CMS_IREG_OCTAVE_1_0+i, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_OCTAVE_1_0+i, 0x00);
}
CMS_WRITE(sc, 0, CMS_IREG_FREQ_CTL, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_FREQ_CTL, 0x00);
CMS_WRITE(sc, 0, CMS_IREG_NOISE_CTL, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_NOISE_CTL, 0x00);
CMS_WRITE(sc, 0, CMS_IREG_NOISE_BW, 0x00);
CMS_WRITE(sc, 1, CMS_IREG_NOISE_BW, 0x00);
/*
* These registers don't appear to be useful, but must be
* cleared otherwise certain voices don't work properly
*/
CMS_WRITE(sc, 0, 0x18, 0x00);
CMS_WRITE(sc, 1, 0x18, 0x00);
CMS_WRITE(sc, 0, 0x19, 0x00);
CMS_WRITE(sc, 1, 0x19, 0x00);
CMS_WRITE(sc, 0, CMS_IREG_SYS_CTL, CMS_IREG_SYS_RESET);
CMS_WRITE(sc, 1, CMS_IREG_SYS_CTL, CMS_IREG_SYS_RESET);
CMS_WRITE(sc, 0, CMS_IREG_SYS_CTL, CMS_IREG_SYS_ENBL);
CMS_WRITE(sc, 1, CMS_IREG_SYS_CTL, CMS_IREG_SYS_ENBL);
}
#endif