/* $NetBSD: ics2101.c,v 1.18 2019/05/08 13:40:18 isaki Exp $ */

/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ken Hornstein and John Kohl.
*
* 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: ics2101.c,v 1.18 2019/05/08 13:40:18 isaki Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/buf.h>

#include <sys/cpu.h>

#include <sys/audioio.h>
#include <dev/audio/audio_if.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>

#include <dev/ic/ics2101reg.h>
#include <dev/isa/ics2101var.h>


#define ICS_VALUE       0x01
#define ICS_MUTE        0x02
#define ICS_MUTE_MUTED  0x04

/* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
  [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */

#define cvt_value(val) ((val) >> 1)

static void ics2101_mix_doit(struct ics2101_softc *, u_int, u_int, u_int,
   u_int);
/*
* Program one channel of the ICS mixer
*/


static void
ics2101_mix_doit(struct ics2101_softc *sc, u_int chan, u_int side, u_int value, u_int flags)
{
       bus_space_tag_t iot = sc->sc_iot;
       unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
       unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
       unsigned char ctrl_addr;
       unsigned char attn_addr;
       unsigned char normal;

       if (/* chan < ICSMIX_CHAN_0 || */ chan > ICSMIX_CHAN_5)
               return;
       if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
               return;

       if (flags & ICS_MUTE) {
               value = cvt_value(sc->sc_setting[chan][side]);
               sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
       } else if (flags & ICS_VALUE) {
               sc->sc_setting[chan][side] = value;
               value = cvt_value(value);
               if (value > ICSMIX_MIN_ATTN)
                       value = ICSMIX_MIN_ATTN;
       } else
               return;

       ctrl_addr = chan << 3;
       attn_addr = chan << 3;

       if (side == ICSMIX_LEFT) {
               ctrl_addr |= ICSMIX_CTRL_LEFT;
               attn_addr |= ICSMIX_ATTN_LEFT;
               if (sc->sc_mute[chan][side])
                       normal = 0x0;
               else if (sc->sc_flags & ICS_FLIP)
                       normal = flip_left[chan];
               else
                       normal = 0x01;
       } else {
               ctrl_addr |= ICSMIX_CTRL_RIGHT;
               attn_addr |= ICSMIX_ATTN_RIGHT;
               if (sc->sc_mute[chan][side])
                       normal = 0x0;
               else if (sc->sc_flags & ICS_FLIP)
                       normal = flip_right[chan];
               else
                       normal = 0x02;
       }

       bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr);
       bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal);

       bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr);
       bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value);
}

void
ics2101_mix_mute(struct ics2101_softc *sc, unsigned int chan, unsigned int side, unsigned int domute)
{
   ics2101_mix_doit(sc, chan, side, 0,
                    domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
}

void
ics2101_mix_attenuate(struct ics2101_softc *sc, unsigned int chan, unsigned int side, unsigned int value)
{
   ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
}