/*      $NetBSD: oplreg.h,v 1.6 2008/04/28 20:23:51 martin Exp $        */

/*
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson ([email protected]).
*
* 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.
*/

/* Offsets from base address */
#define OPL_L                           0
#define OPL_R                           2

/* Offsets from base+[OPL_L|OPL_R] */
#define OPL_STATUS                      0
#define   OPL_STATUS_IRQ                0x80
#define   OPL_STATUS_FT1                0x40
#define   OPL_STATUS_FT2                0x20
#define   OPL_STATUS_MASK               0xE0
#define OPL_ADDR                        0
#define OPL_DATA                        1

#define OPL_TEST                        0x01
#define   OPL_ENABLE_WAVE_SELECT        0x20

#define OPL_TIMER1                      0x02
#define OPL_TIMER2                      0x03

#define OPL_TIMER_CONTROL               0x04    /* Left */
#define   OPL_TIMER1_START              0x01
#define   OPL_TIMER2_START              0x02
#define   OPL_TIMER2_MASK               0x20
#define   OPL_TIMER1_MASK               0x40
#define   OPL_IRQ_RESET                 0x80

#define OPL_CONNECTION_SELECT           0x04    /* Right */
#define   OPL_NOCONNECTION              0x00
#define   OPL_R_4OP_0                   0x01
#define   OPL_R_4OP_1                   0x02
#define   OPL_R_4OP_2                   0x04
#define   OPL_L_4OP_0                   0x08
#define   OPL_L_4OP_1                   0x10
#define   OPL_L_4OP_2                   0x20

#define OPL_MODE                        0x05    /* Right */
#define   OPL3_ENABLE                   0x01
#define   OPL4_ENABLE                   0x02

#define OPL_KBD_SPLIT                   0x08    /* Left */
#define   OPL_KEYBOARD_SPLIT            0x40
#define   OPL_COMPOSITE_SINE_WAVE_MODE  0x80

#define OPL_PERCUSSION                  0xbd    /* Left */
#define   OPL_NOPERCUSSION              0x00
#define   OPL_HIHAT                     0x01
#define   OPL_CYMBAL                    0x02
#define   OPL_TOMTOM                    0x04
#define   OPL_SNAREDRUM                 0x08
#define   OPL_BASSDRUM                  0x10
#define   OPL_PERCUSSION_ENABLE         0x20
#define   OPL_VIBRATO_DEPTH             0x40
#define   OPL_TREMOLO_DEPTH             0x80

/*
* Offsets to the register banks for operators.
*/
/* AM/VIB/EG/KSR/Multiple (0x20 to 0x35) */
#define OPL_AM_VIB                      0x20
#define   OPL_KSR                       0x10
#define   OPL_SUSTAIN                   0x20
#define   OPL_VIBRATO                   0x40
#define   OPL_TREMOLO                   0x80
#define   OPL_MULTIPLE_MASK             0x0f

/* KSL/Total level (0x40 to 0x55) */
#define OPL_KSL_LEVEL                   0x40
#define   OPL_KSL_MASK                  0xc0    /* Envelope scaling bits */
#define   OPL_TOTAL_LEVEL_MASK          0x3f    /* Strength (volume) of OP */

/* Attack / Decay rate (0x60 to 0x75) */
#define OPL_ATTACK_DECAY                0x60
#define   OPL_ATTACK_MASK               0xf0
#define   DECAY_MASK                    0x0f

/* Sustain level / Release rate (0x80 to 0x95) */
#define OPL_SUSTAIN_RELEASE             0x80
#define   OPL_SUSTAIN_MASK              0xf0
#define   OPL_RELEASE_MASK              0x0f

/* Wave select (0xE0 to 0xF5) */
#define OPL_WAVE_SELECT                 0xe0

#define OPL_MAXREG                      0xf5

/*
* Offsets to the register banks for voices.
*/
/* F-Number low bits (0xA0 to 0xA8). */
#define OPL_FNUM_LOW                    0xa0

/* F-number high bits / Key on / Block (octave) (0xB0 to 0xB8) */
#define OPL_KEYON_BLOCK                 0xb0
#define   OPL_KEYON_BIT                 0x20
#define   OPL_BLOCKNUM_MASK             0x1c
#define   OPL_FNUM_HIGH_MASK            0x03

/* Feedback / Connection (0xc0 to 0xc8) */
#define OPL_FEEDBACK_CONNECTION         0xc0
#define   OPL_FEEDBACK_MASK             0x0e
#define   OPL_CONNECTION_BIT            0x01
#define   OPL_STEREO_BITS               0x30    /* OPL-3 only */
#define     OPL_VOICE_TO_LEFT           0x10
#define     OPL_VOICE_TO_RIGHT          0x20

#define OPL2_NVOICE 9
#define OPL3_NVOICE 18

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