dev/ic/oplreg.h

/*	$NetBSD: oplreg.h,v 1.1 1998/08/17 21:16:13 augustss Exp $	*/

/*
 * Copyright (c) 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Author: Lennart Augustsson
 *
 * 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 the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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_LO				0
#define OPL_HI				2

/* Offsets from base+[LO|HI] */
#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	/* LO */
#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	/* HI */
#define   OPL_NOCONNECTION		0x00
#define   OPL_HI_4OP_0			0x01
#define   OPL_HI_4OP_1			0x02
#define   OPL_HI_4OP_2			0x04
#define   OPL_LO_4OP_0			0x08
#define   OPL_LO_4OP_1			0x10
#define   OPL_LO_4OP_2			0x20

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

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

#define OPL_PERCUSSION			0xbd	/* LO */
#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. To get the
 *	register number just add the operator offset to the bank offset
 *
 *	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. Just add to the
 *	voice number to get the register number.
 *
 *	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)
 *
 *	These registers have two new bits when the OPL-3 mode
 *	is selected. These bits controls connecting the voice
 *	to the stereo channels. For 4 OP voices this bit is
 *	defined in the second half of the voice (add 3 to the
 *	register offset).
 *
 *	For 4 OP voices the connection bit is used in the
 *	both halves (gives 4 ways to connect the operators).
 */
#define OPL_FEEDBACK_CONNECTION		0xc0
#define   OPL_FEEDBACK_MASK		0x0e	/* Valid just for 1st OP of a voice */
#define   OPL_CONNECTION_BIT		0x01
/*
 *	In the 4 OP mode there is four possible configurations how the
 *	operators can be connected together (in 2 OP modes there is just
 *	AM or FM). The 4 OP connection mode is defined by the rightmost
 *	bit of the FEEDBACK_CONNECTION (0xC0-0xC8) on the both halves.
 *
 *	First half	Second half	Mode
 *
 *					 +---+
 *					 v   |
 *	0		0		>+-1-+--2--3--4-->
 *
 *
 *
 *					 +---+
 *					 |   |
 *	0		1		>+-1-+--2-+
 *						  |->
 *					>--3----4-+
 *
 *					 +---+
 *					 |   |
 *	1		0		>+-1-+-----+
 *						   |->
 *					>--2--3--4-+
 *
 *					 +---+
 *					 |   |
 *	1		1		>+-1-+--+
 *						|
 *					>--2--3-+->
 *						|
 *					>--4----+
 */
#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