/*      $NetBSD: opm.c,v 1.20 2014/03/26 08:17:59 christos Exp $        */

/*
 * Copyright (c) 1995 Masanobu Saitoh, Takuya Harakawa.
 * 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 Masanobu Saitoh.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

/*
 * Temporary implementation: not fully bus.h'fied.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: opm.c,v 1.20 2014/03/26 08:17:59 christos Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <machine/bus.h>
#include <machine/cpu.h>

#include <machine/opmreg.h>
#include <arch/x68k/dev/opmvar.h>
#include <arch/x68k/dev/intiovar.h>

struct opm_softc {
        bus_space_tag_t         sc_bst;
        bus_space_handle_t      sc_bht;
        u_int8_t                sc_regs[0x100];
        struct opm_voice        sc_vdata[8];
};

struct opm_softc        *opm0;  /* XXX */

static int opm_match(device_t, cfdata_t, void *);
static void opm_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(opm, sizeof(struct opm_softc),
    opm_match, opm_attach, NULL, NULL);

static int
opm_match(device_t parent, cfdata_t cf, void *aux)
{
        struct intio_attach_args *ia = aux;

        if (strcmp(ia->ia_name, "opm") != 0)
                return 0;

        if (ia->ia_addr == INTIOCF_ADDR_DEFAULT)
                ia->ia_addr = 0xe90000;
        ia->ia_size = 0x2000;
        if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY))
                return 0;

        return 1;
}

static void
opm_attach(device_t parent, device_t self, void *aux)
{
        struct opm_softc *sc = device_private(self);
        struct intio_attach_args *ia = aux;
        int r __diagused;

        aprint_normal("\n");
        ia->ia_size = 0x2000;
        r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
#ifdef DIAGNOSTIC
        if (r)
                panic("IO map for OPM corruption??");
#endif

        sc->sc_bst = ia->ia_bst;
        r = bus_space_map(sc->sc_bst,
                           ia->ia_addr, ia->ia_size,
                           BUS_SPACE_MAP_SHIFTED,
                           &sc->sc_bht);
#ifdef DIAGNOSTIC
        if (r)
                panic("Cannot map IO space for OPM.");
#endif

        /* XXX device_unit() abuse */
        if (device_unit(self) == 0)
                opm0 = sc;      /* XXX */

        return;
}

void opm_set_volume(int, int);
void opm_set_key(int, int);
void opm_set_voice(int, struct opm_voice *);
void opm_set_voice_sub(int, struct opm_operator *);
inline static void writeopm(int, int);
inline static int readopm(int);
void opm_key_on(u_char);
void opm_key_off(u_char);
int opmopen(dev_t, int, int);
int opmclose(dev_t);

inline static void
writeopm(int reg, int dat)
{
        while (bus_space_read_1(opm0->sc_bst, opm0->sc_bht, OPM_DATA) & 0x80);
        bus_space_write_1(opm0->sc_bst, opm0->sc_bht, OPM_REG, reg);
        while (bus_space_read_1(opm0->sc_bst, opm0->sc_bht, OPM_DATA) & 0x80);
        bus_space_write_1(opm0->sc_bst, opm0->sc_bht, OPM_DATA, dat);
        opm0->sc_regs[reg] = dat;
}

inline static int
readopm(int reg)
{
        return opm0->sc_regs[reg];
}

#include "fd.h"
#include "vs.h"
#include "bell.h"

#if NVS > 0
void
adpcm_chgclk(u_char clk)
{
        writeopm(0x1b, (readopm(0x1b) & ~OPM1B_CT1MSK) | clk);
}
#endif

#if NFD > 0
void
fdc_force_ready(u_char rdy)
{
        writeopm(0x1b, (readopm(0x1b) & ~OPM1B_CT2MSK) | rdy);
}
#endif

#if NBELL > 0
void
opm_key_on(u_char channel)
{
        writeopm(0x08, opm0->sc_vdata[channel].sm << 3 | channel);
}

void
opm_key_off(u_char channel)
{
        writeopm(0x08, channel);
}

void
opm_set_voice(int channel, struct opm_voice *voice)
{
        memcpy(&opm0->sc_vdata[channel], voice, sizeof(struct opm_voice));

        opm_set_voice_sub(0x40 + channel, &voice->m1);
        opm_set_voice_sub(0x48 + channel, &voice->m2);
        opm_set_voice_sub(0x50 + channel, &voice->c1);
        opm_set_voice_sub(0x58 + channel, &voice->c2);
        writeopm(0x20 + channel, 0xc0 | (voice->fb & 0x7) << 3 |
                 (voice->con & 0x7));
}

void
opm_set_voice_sub(int reg, struct opm_operator *op)
{
        /* DT1/MUL */
        writeopm(reg, (op->dt1 & 0x7) << 3 | (op->mul & 0x7));

        /* TL */
        writeopm(reg + 0x20, op->tl & 0x7f);

        /* KS/AR */
        writeopm(reg + 0x40, (op->ks & 0x3) << 6 | (op->ar & 0x1f));

        /* AMS/D1R */
        writeopm(reg + 0x60, (op->ame & 0x1) << 7 | (op->d1r & 0x1f));

        /* DT2/D2R */
        writeopm(reg + 0x80, (op->dt2 & 0x3) << 6 | (op->d2r & 0x1f));

        /* D1L/RR */
        writeopm(reg + 0xa0, (op->d1l & 0xf) << 4 | (op->rr & 0xf));
}

void
opm_set_volume(int channel, int volume)
{
        int value;

        switch (opm0->sc_vdata[channel].con) {
        case 7:
                value = opm0->sc_vdata[channel].m1.tl + volume;
                writeopm(0x60 + channel, ((value > 0x7f) ? 0x7f : value));
        case 6:
        case 5:
                value = opm0->sc_vdata[channel].m2.tl + volume;
                writeopm(0x68 + channel, ((value > 0x7f) ? 0x7f : value));
        case 4:
                value = opm0->sc_vdata[channel].c1.tl + volume;
                writeopm(0x70 + channel, ((value > 0x7f) ? 0x7f : value));
        case 3:
        case 2:
        case 1:
        case 0:
                value = opm0->sc_vdata[channel].c2.tl + volume;
                writeopm(0x78 + channel, ((value > 0x7f) ? 0x7f : value));
        }
}

void
opm_set_key(int channel, int tone)
{
        writeopm(0x28 + channel, tone >> 8);
        writeopm(0x30 + channel, tone & 0xff);
}

/*ARGSUSED*/
int
opmopen(dev_t dev, int flag, int mode)
{
        return 0;
}

/*ARGSUSED*/
int
opmclose(dev_t dev)
{
        return 0;
}

#endif