330 lines
8.2 KiB
C
330 lines
8.2 KiB
C
/* $NetBSD: cms.c,v 1.23 2019/05/08 13:40:18 isaki 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.
|
|
*
|
|
* 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 <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: cms.c,v 1.23 2019/05/08 13:40:18 isaki Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/device.h>
|
|
#include <sys/select.h>
|
|
|
|
#include <sys/bus.h>
|
|
|
|
#include <sys/audioio.h>
|
|
#include <dev/audio/audio_if.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 {
|
|
kmutex_t sc_lock;
|
|
|
|
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(device_t, cfdata_t, void *);
|
|
void cms_attach(device_t, device_t, void *);
|
|
|
|
CFATTACH_DECL_NEW(cms, sizeof(struct cms_softc),
|
|
cms_probe, cms_attach, NULL, NULL);
|
|
|
|
int cms_open(midisyn *, int);
|
|
void cms_close(midisyn *);
|
|
void cms_on(midisyn *, uint_fast16_t, midipitch_t, int16_t);
|
|
void cms_off(midisyn *, uint_fast16_t, uint_fast8_t);
|
|
|
|
struct midisyn_methods midi_cms_hw = {
|
|
.open = cms_open,
|
|
.close = cms_close,
|
|
.attackv = cms_on,
|
|
.releasev = cms_off,
|
|
};
|
|
|
|
static void cms_reset(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(device_t parent, cfdata_t 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_nio < 1)
|
|
return 0;
|
|
|
|
if (ISA_DIRECT_CONFIG(ia))
|
|
return 0;
|
|
|
|
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
|
|
return 0;
|
|
|
|
if (bus_space_map(iot, ia->ia_io[0].ir_addr, 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_nio = 1;
|
|
ia->ia_io[0].ir_size = CMS_IOSIZE;
|
|
|
|
ia->ia_niomem = 0;
|
|
ia->ia_nirq = 0;
|
|
ia->ia_ndrq = 0;
|
|
|
|
out:
|
|
bus_space_unmap(iot, ioh, CMS_IOSIZE);
|
|
|
|
return found;
|
|
}
|
|
|
|
|
|
void
|
|
cms_attach(device_t parent, device_t self, void *aux)
|
|
{
|
|
struct cms_softc *sc = device_private(self);
|
|
struct isa_attach_args *ia = aux;
|
|
bus_space_tag_t iot;
|
|
bus_space_handle_t ioh;
|
|
midisyn *ms;
|
|
|
|
mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_AUDIO);
|
|
|
|
aprint_normal("\n");
|
|
|
|
DPRINTF(("cms_attach():\n"));
|
|
|
|
iot = ia->ia_iot;
|
|
|
|
if (bus_space_map(iot, ia->ia_io[0].ir_addr, CMS_IOSIZE, 0, &ioh)) {
|
|
aprint_error_dev(self, "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);
|
|
|
|
/* init the synthesiser */
|
|
ms = &sc->sc_midisyn;
|
|
ms->mets = &midi_cms_hw;
|
|
strcpy(ms->name, "Creative Music System");
|
|
ms->nvoice = CMS_NVOICES;
|
|
ms->data = sc;
|
|
ms->lock = &sc->sc_lock;
|
|
midisyn_init(ms);
|
|
|
|
/* and attach the midi device with the synthesiser */
|
|
midi_attach_mi(&midisyn_hw_if, ms, self);
|
|
}
|
|
|
|
|
|
int
|
|
cms_open(midisyn *ms, int flag)
|
|
{
|
|
struct cms_softc *sc = (struct cms_softc *)ms->data;
|
|
|
|
cms_reset(sc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
cms_close(midisyn *ms)
|
|
{
|
|
struct cms_softc *sc = (struct cms_softc *)ms->data;
|
|
|
|
cms_reset(sc);
|
|
}
|
|
|
|
void
|
|
cms_on(midisyn *ms, uint_fast16_t vidx, midipitch_t mp, int16_t level_cB)
|
|
{
|
|
struct cms_softc *sc = (struct cms_softc *)ms->data;
|
|
int chip = CHAN_TO_CHIP(vidx);
|
|
int voice = CHAN_TO_VOICE(vidx);
|
|
uint32_t note;
|
|
u_int8_t octave;
|
|
u_int8_t count;
|
|
u_int8_t reg;
|
|
u_int8_t vol;
|
|
|
|
/*
|
|
* The next line is a regrettable hack, because it drops all pitch
|
|
* adjustment midisyn has supplied in miditune, so this synth will
|
|
* not respond to tuning, pitchbend, etc. It seems it ought to be
|
|
* possible to DTRT if the formula that generated the cms_note_table
|
|
* can be found, but I've had no luck, and a plot of the numbers in
|
|
* the table clearly curves the wrong way to be derived any obvious
|
|
* way from the equal tempered scale. (Or maybe the table's wrong?
|
|
* Has this device been playing flat up the scale? I don't have
|
|
* access to one to try.)
|
|
*/
|
|
note = MIDIPITCH_TO_KEY(mp);
|
|
|
|
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 */
|
|
/* this may be the wrong curve but will do something. no docs! */
|
|
vol = 15 + ((level_cB > -75) ? level_cB/5 : -15);
|
|
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(midisyn *ms, uint_fast16_t vidx, uint_fast8_t vel)
|
|
{
|
|
struct cms_softc *sc = (struct cms_softc *)ms->data;
|
|
int chip = CHAN_TO_CHIP(vidx);
|
|
int voice = CHAN_TO_VOICE(vidx);
|
|
u_int8_t reg;
|
|
|
|
/* 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(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);
|
|
}
|