343 lines
8.8 KiB
C
343 lines
8.8 KiB
C
/* $NetBSD: cms.c,v 1.14 2006/11/16 01:33:00 christos Exp $ */
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/*
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cms.c,v 1.14 2006/11/16 01:33:00 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/select.h>
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#include <machine/bus.h>
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#include <sys/audioio.h>
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#include <dev/audio_if.h>
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#include <dev/audiovar.h>
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#include <sys/midiio.h>
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#include <dev/midi_if.h>
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#include <dev/midivar.h>
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#include <dev/midisynvar.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/cmsreg.h>
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#ifdef AUDIO_DEBUG
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#define DPRINTF(x) if (cmsdebug) printf x
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int cmsdebug = 0;
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#else
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#define DPRINTF(x)
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#endif
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struct cms_softc {
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struct midi_softc sc_mididev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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/* shadow registers for each chip */
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u_int8_t sc_shadowregs[32*2];
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midisyn sc_midisyn;
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};
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int cms_probe(struct device *, struct cfdata *, void *);
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void cms_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(cms, sizeof(struct cms_softc),
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cms_probe, cms_attach, NULL, NULL);
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int cms_open(midisyn *, int);
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void cms_close(midisyn *);
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void cms_on(midisyn *, uint_fast16_t, midipitch_t, int16_t);
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void cms_off(midisyn *, uint_fast16_t, uint_fast8_t);
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struct midisyn_methods midi_cms_hw = {
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.open = cms_open,
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.close = cms_close,
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.attackv = cms_on,
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.releasev = cms_off,
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};
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static void cms_reset(struct cms_softc *);
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static char cms_note_table[] = {
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/* A */ 3,
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/* A# */ 31,
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/* B */ 58,
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/* C */ 83,
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/* C# */ 107,
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/* D */ 130,
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/* D# */ 151,
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/* E */ 172,
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/* F */ 191,
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/* F# */ 209,
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/* G */ 226,
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/* G# */ 242,
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};
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#define NOTE_TO_OCTAVE(note) (((note)-CMS_FIRST_NOTE)/12)
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#define NOTE_TO_COUNT(note) cms_note_table[(((note)-CMS_FIRST_NOTE)%12)]
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int
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cms_probe(struct device *parent, struct cfdata *match,
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void *aux)
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{
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struct isa_attach_args *ia = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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int found = 0;
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int i;
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DPRINTF(("cms_probe():\n"));
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iot = ia->ia_iot;
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if (ia->ia_nio < 1)
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return 0;
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if (ISA_DIRECT_CONFIG(ia))
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return 0;
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if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
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return 0;
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if (bus_space_map(iot, ia->ia_io[0].ir_addr, CMS_IOSIZE, 0, &ioh))
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return 0;
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bus_space_write_1(iot, ioh, CMS_WREG, 0xaa);
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if (bus_space_read_1(iot, ioh, CMS_RREG) != 0xaa)
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goto out;
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for (i = 0; i < 8; i++) {
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if (bus_space_read_1(iot, ioh, CMS_MREG) != 0x7f)
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goto out;
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}
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found = 1;
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ia->ia_nio = 1;
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ia->ia_io[0].ir_size = CMS_IOSIZE;
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ia->ia_niomem = 0;
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ia->ia_nirq = 0;
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ia->ia_ndrq = 0;
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out:
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bus_space_unmap(iot, ioh, CMS_IOSIZE);
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return found;
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}
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void
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cms_attach(struct device *parent, struct device *self, void *aux)
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{
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struct cms_softc *sc = (struct cms_softc *)self;
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struct isa_attach_args *ia = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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midisyn *ms;
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struct audio_attach_args arg;
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printf("\n");
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DPRINTF(("cms_attach():\n"));
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iot = ia->ia_iot;
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if (bus_space_map(iot, ia->ia_io[0].ir_addr, CMS_IOSIZE, 0, &ioh)) {
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printf(": can't map i/o space\n");
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return;
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}
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sc->sc_iot = iot;
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sc->sc_ioh = ioh;
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/* now let's reset the chips */
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cms_reset(sc);
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ms = &sc->sc_midisyn;
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ms->mets = &midi_cms_hw;
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strcpy(ms->name, "Creative Music System");
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ms->nvoice = CMS_NVOICES;
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ms->data = sc;
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/* use the synthesiser */
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midisyn_attach(&sc->sc_mididev, ms);
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/* now attach the midi device to the synthesiser */
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arg.type = AUDIODEV_TYPE_MIDI;
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arg.hwif = sc->sc_mididev.hw_if;
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arg.hdl = sc->sc_mididev.hw_hdl;
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config_found((struct device *)&sc->sc_mididev, &arg, 0);
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}
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int
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cms_open(midisyn *ms, int flag)
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{
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struct cms_softc *sc = (struct cms_softc *)ms->data;
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cms_reset(sc);
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return 0;
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}
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void
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cms_close(ms)
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midisyn *ms;
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{
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struct cms_softc *sc = (struct cms_softc *)ms->data;
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cms_reset(sc);
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}
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void
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cms_on(midisyn *ms, uint_fast16_t vidx, midipitch_t mp, int16_t level_cB)
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{
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struct cms_softc *sc = (struct cms_softc *)ms->data;
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int chip = CHAN_TO_CHIP(vidx);
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int voice = CHAN_TO_VOICE(vidx);
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uint32_t note;
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u_int8_t octave;
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u_int8_t count;
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u_int8_t reg;
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u_int8_t vol;
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/*
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* The next line is a regrettable hack, because it drops all pitch
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* adjustment midisyn has supplied in miditune, so this synth will
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* not respond to tuning, pitchbend, etc. It seems it ought to be
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* possible to DTRT if the formula that generated the cms_note_table
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* can be found, but I've had no luck, and a plot of the numbers in
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* the table clearly curves the wrong way to be derived any obvious
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* way from the equal tempered scale. (Or maybe the table's wrong?
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* Has this device been playing flat up the scale? I don't have
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* access to one to try.)
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*/
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note = MIDIPITCH_TO_KEY(mp);
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if (note < CMS_FIRST_NOTE)
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return;
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octave = NOTE_TO_OCTAVE(note);
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count = NOTE_TO_COUNT(note);
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DPRINTF(("chip=%d voice=%d octave=%d count=%d offset=%d shift=%d\n",
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chip, voice, octave, count, OCTAVE_OFFSET(voice),
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OCTAVE_SHIFT(voice)));
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/* write the count */
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CMS_WRITE(sc, chip, CMS_IREG_FREQ0 + voice, count);
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/* select the octave */
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reg = CMS_READ(sc, chip, CMS_IREG_OCTAVE_1_0 + OCTAVE_OFFSET(voice));
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reg &= ~(0x0f<<OCTAVE_SHIFT(voice));
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reg |= ((octave&0x7)<<OCTAVE_SHIFT(voice));
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CMS_WRITE(sc, chip, CMS_IREG_OCTAVE_1_0 + OCTAVE_OFFSET(voice), reg);
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/* set the volume */
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/* this may be the wrong curve but will do something. no docs! */
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vol = 15 + (level_cB > -75) ? level_cB/5 : -15;
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CMS_WRITE(sc, chip, CMS_IREG_VOL0 + voice, ((vol<<4)|vol));
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/* enable the voice */
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reg = CMS_READ(sc, chip, CMS_IREG_FREQ_CTL);
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reg |= (1<<voice);
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CMS_WRITE(sc, chip, CMS_IREG_FREQ_CTL, reg);
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}
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void
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cms_off(midisyn *ms, uint_fast16_t vidx, uint_fast8_t vel)
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{
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struct cms_softc *sc = (struct cms_softc *)ms->data;
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int chip = CHAN_TO_CHIP(vidx);
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int voice = CHAN_TO_VOICE(vidx);
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u_int8_t reg;
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/* disable the channel */
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reg = CMS_READ(sc, chip, CMS_IREG_FREQ_CTL);
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reg &= ~(1<<voice);
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CMS_WRITE(sc, chip, CMS_IREG_FREQ_CTL, reg);
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}
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static void
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cms_reset(sc)
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struct cms_softc *sc;
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{
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int i;
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DPRINTF(("cms_reset():\n"));
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for (i = 0; i < 6; i++) {
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CMS_WRITE(sc, 0, CMS_IREG_VOL0+i, 0x00);
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CMS_WRITE(sc, 1, CMS_IREG_VOL0+i, 0x00);
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CMS_WRITE(sc, 0, CMS_IREG_FREQ0+i, 0x00);
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CMS_WRITE(sc, 1, CMS_IREG_FREQ0+i, 0x00);
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}
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for (i = 0; i < 3; i++) {
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CMS_WRITE(sc, 0, CMS_IREG_OCTAVE_1_0+i, 0x00);
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CMS_WRITE(sc, 1, CMS_IREG_OCTAVE_1_0+i, 0x00);
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}
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CMS_WRITE(sc, 0, CMS_IREG_FREQ_CTL, 0x00);
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CMS_WRITE(sc, 1, CMS_IREG_FREQ_CTL, 0x00);
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CMS_WRITE(sc, 0, CMS_IREG_NOISE_CTL, 0x00);
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CMS_WRITE(sc, 1, CMS_IREG_NOISE_CTL, 0x00);
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CMS_WRITE(sc, 0, CMS_IREG_NOISE_BW, 0x00);
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CMS_WRITE(sc, 1, CMS_IREG_NOISE_BW, 0x00);
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/*
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* These registers don't appear to be useful, but must be
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* cleared otherwise certain voices don't work properly
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*/
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CMS_WRITE(sc, 0, 0x18, 0x00);
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CMS_WRITE(sc, 1, 0x18, 0x00);
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CMS_WRITE(sc, 0, 0x19, 0x00);
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CMS_WRITE(sc, 1, 0x19, 0x00);
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CMS_WRITE(sc, 0, CMS_IREG_SYS_CTL, CMS_IREG_SYS_RESET);
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CMS_WRITE(sc, 1, CMS_IREG_SYS_CTL, CMS_IREG_SYS_RESET);
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CMS_WRITE(sc, 0, CMS_IREG_SYS_CTL, CMS_IREG_SYS_ENBL);
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CMS_WRITE(sc, 1, CMS_IREG_SYS_CTL, CMS_IREG_SYS_ENBL);
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}
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