376 lines
12 KiB
C
376 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __SOUND_OPL3_H
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#define __SOUND_OPL3_H
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/*
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* Definitions of the OPL-3 registers.
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*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
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* Hannu Savolainen 1993-1996
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*
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* The OPL-3 mode is switched on by writing 0x01, to the offset 5
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* of the right side.
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*
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* Another special register at the right side is at offset 4. It contains
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* a bit mask defining which voices are used as 4 OP voices.
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*
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* The percussive mode is implemented in the left side only.
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*
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* With the above exceptions the both sides can be operated independently.
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*
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* A 4 OP voice can be created by setting the corresponding
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* bit at offset 4 of the right side.
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*
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* For example setting the rightmost bit (0x01) changes the
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* first voice on the right side to the 4 OP mode. The fourth
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* voice is made inaccessible.
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*
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* If a voice is set to the 2 OP mode, it works like 2 OP modes
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* of the original YM3812 (AdLib). In addition the voice can
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* be connected the left, right or both stereo channels. It can
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* even be left unconnected. This works with 4 OP voices also.
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*
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* The stereo connection bits are located in the FEEDBACK_CONNECTION
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* register of the voice (0xC0-0xC8). In 4 OP voices these bits are
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* in the second half of the voice.
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*/
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#include <sound/core.h>
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#include <sound/hwdep.h>
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#include <sound/timer.h>
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#include <sound/seq_midi_emul.h>
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#include <sound/seq_oss.h>
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#include <sound/seq_oss_legacy.h>
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#include <sound/seq_device.h>
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#include <sound/asound_fm.h>
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/*
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* Register numbers for the global registers
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*/
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#define OPL3_REG_TEST 0x01
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#define OPL3_ENABLE_WAVE_SELECT 0x20
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#define OPL3_REG_TIMER1 0x02
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#define OPL3_REG_TIMER2 0x03
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#define OPL3_REG_TIMER_CONTROL 0x04 /* Left side */
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#define OPL3_IRQ_RESET 0x80
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#define OPL3_TIMER1_MASK 0x40
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#define OPL3_TIMER2_MASK 0x20
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#define OPL3_TIMER1_START 0x01
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#define OPL3_TIMER2_START 0x02
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#define OPL3_REG_CONNECTION_SELECT 0x04 /* Right side */
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#define OPL3_LEFT_4OP_0 0x01
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#define OPL3_LEFT_4OP_1 0x02
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#define OPL3_LEFT_4OP_2 0x04
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#define OPL3_RIGHT_4OP_0 0x08
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#define OPL3_RIGHT_4OP_1 0x10
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#define OPL3_RIGHT_4OP_2 0x20
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#define OPL3_REG_MODE 0x05 /* Right side */
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#define OPL3_OPL3_ENABLE 0x01 /* OPL3 mode */
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#define OPL3_OPL4_ENABLE 0x02 /* OPL4 mode */
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#define OPL3_REG_KBD_SPLIT 0x08 /* Left side */
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#define OPL3_COMPOSITE_SINE_WAVE_MODE 0x80 /* Don't use with OPL-3? */
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#define OPL3_KEYBOARD_SPLIT 0x40
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#define OPL3_REG_PERCUSSION 0xbd /* Left side only */
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#define OPL3_TREMOLO_DEPTH 0x80
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#define OPL3_VIBRATO_DEPTH 0x40
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#define OPL3_PERCUSSION_ENABLE 0x20
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#define OPL3_BASSDRUM_ON 0x10
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#define OPL3_SNAREDRUM_ON 0x08
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#define OPL3_TOMTOM_ON 0x04
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#define OPL3_CYMBAL_ON 0x02
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#define OPL3_HIHAT_ON 0x01
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/*
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* Offsets to the register banks for operators. To get the
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* register number just add the operator offset to the bank offset
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*
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* AM/VIB/EG/KSR/Multiple (0x20 to 0x35)
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*/
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#define OPL3_REG_AM_VIB 0x20
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#define OPL3_TREMOLO_ON 0x80
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#define OPL3_VIBRATO_ON 0x40
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#define OPL3_SUSTAIN_ON 0x20
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#define OPL3_KSR 0x10 /* Key scaling rate */
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#define OPL3_MULTIPLE_MASK 0x0f /* Frequency multiplier */
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/*
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* KSL/Total level (0x40 to 0x55)
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*/
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#define OPL3_REG_KSL_LEVEL 0x40
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#define OPL3_KSL_MASK 0xc0 /* Envelope scaling bits */
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#define OPL3_TOTAL_LEVEL_MASK 0x3f /* Strength (volume) of OP */
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/*
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* Attack / Decay rate (0x60 to 0x75)
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*/
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#define OPL3_REG_ATTACK_DECAY 0x60
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#define OPL3_ATTACK_MASK 0xf0
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#define OPL3_DECAY_MASK 0x0f
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/*
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* Sustain level / Release rate (0x80 to 0x95)
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*/
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#define OPL3_REG_SUSTAIN_RELEASE 0x80
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#define OPL3_SUSTAIN_MASK 0xf0
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#define OPL3_RELEASE_MASK 0x0f
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/*
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* Wave select (0xE0 to 0xF5)
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*/
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#define OPL3_REG_WAVE_SELECT 0xe0
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#define OPL3_WAVE_SELECT_MASK 0x07
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/*
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* Offsets to the register banks for voices. Just add to the
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* voice number to get the register number.
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*
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* F-Number low bits (0xA0 to 0xA8).
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*/
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#define OPL3_REG_FNUM_LOW 0xa0
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/*
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* F-number high bits / Key on / Block (octave) (0xB0 to 0xB8)
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*/
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#define OPL3_REG_KEYON_BLOCK 0xb0
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#define OPL3_KEYON_BIT 0x20
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#define OPL3_BLOCKNUM_MASK 0x1c
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#define OPL3_FNUM_HIGH_MASK 0x03
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/*
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* Feedback / Connection (0xc0 to 0xc8)
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*
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* These registers have two new bits when the OPL-3 mode
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* is selected. These bits controls connecting the voice
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* to the stereo channels. For 4 OP voices this bit is
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* defined in the second half of the voice (add 3 to the
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* register offset).
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*
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* For 4 OP voices the connection bit is used in the
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* both halves (gives 4 ways to connect the operators).
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*/
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#define OPL3_REG_FEEDBACK_CONNECTION 0xc0
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#define OPL3_FEEDBACK_MASK 0x0e /* Valid just for 1st OP of a voice */
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#define OPL3_CONNECTION_BIT 0x01
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/*
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* In the 4 OP mode there is four possible configurations how the
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* operators can be connected together (in 2 OP modes there is just
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* AM or FM). The 4 OP connection mode is defined by the rightmost
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* bit of the FEEDBACK_CONNECTION (0xC0-0xC8) on the both halves.
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*
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* First half Second half Mode
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*
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* +---+
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* v |
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* 0 0 >+-1-+--2--3--4-->
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*
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*
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*
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* +---+
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* | |
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* 0 1 >+-1-+--2-+
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* |->
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* >--3----4-+
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*
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* +---+
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* | |
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* 1 0 >+-1-+-----+
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* |->
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* >--2--3--4-+
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*
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* +---+
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* | |
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* 1 1 >+-1-+--+
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* |
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* >--2--3-+->
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* |
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* >--4----+
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*/
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#define OPL3_STEREO_BITS 0x30 /* OPL-3 only */
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#define OPL3_VOICE_TO_LEFT 0x10
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#define OPL3_VOICE_TO_RIGHT 0x20
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/*
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*/
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#define OPL3_LEFT 0x0000
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#define OPL3_RIGHT 0x0100
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#define OPL3_HW_AUTO 0x0000
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#define OPL3_HW_OPL2 0x0200
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#define OPL3_HW_OPL3 0x0300
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#define OPL3_HW_OPL3_SV 0x0301 /* S3 SonicVibes */
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#define OPL3_HW_OPL3_CS 0x0302 /* CS4232/CS4236+ */
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#define OPL3_HW_OPL3_FM801 0x0303 /* FM801 */
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#define OPL3_HW_OPL3_CS4281 0x0304 /* CS4281 */
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#define OPL3_HW_OPL4 0x0400 /* YMF278B/YMF295 */
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#define OPL3_HW_OPL4_ML 0x0401 /* YMF704/YMF721 */
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#define OPL3_HW_MASK 0xff00
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#define MAX_OPL2_VOICES 9
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#define MAX_OPL3_VOICES 18
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struct snd_opl3;
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/*
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* Instrument record, aka "Patch"
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*/
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/* FM operator */
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struct fm_operator {
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unsigned char am_vib;
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unsigned char ksl_level;
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unsigned char attack_decay;
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unsigned char sustain_release;
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unsigned char wave_select;
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} __attribute__((packed));
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/* Instrument data */
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struct fm_instrument {
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struct fm_operator op[4];
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unsigned char feedback_connection[2];
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unsigned char echo_delay;
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unsigned char echo_atten;
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unsigned char chorus_spread;
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unsigned char trnsps;
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unsigned char fix_dur;
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unsigned char modes;
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unsigned char fix_key;
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};
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/* type */
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#define FM_PATCH_OPL2 0x01 /* OPL2 2 operators FM instrument */
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#define FM_PATCH_OPL3 0x02 /* OPL3 4 operators FM instrument */
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/* Instrument record */
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struct fm_patch {
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unsigned char prog;
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unsigned char bank;
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unsigned char type;
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struct fm_instrument inst;
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char name[24];
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struct fm_patch *next;
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};
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/*
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* A structure to keep track of each hardware voice
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*/
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struct snd_opl3_voice {
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int state; /* status */
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#define SNDRV_OPL3_ST_OFF 0 /* Not playing */
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#define SNDRV_OPL3_ST_ON_2OP 1 /* 2op voice is allocated */
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#define SNDRV_OPL3_ST_ON_4OP 2 /* 4op voice is allocated */
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#define SNDRV_OPL3_ST_NOT_AVAIL -1 /* voice is not available */
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unsigned int time; /* An allocation time */
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unsigned char note; /* Note currently assigned to this voice */
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unsigned long note_off; /* note-off time */
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int note_off_check; /* check note-off time */
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unsigned char keyon_reg; /* KON register shadow */
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struct snd_midi_channel *chan; /* Midi channel for this note */
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};
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struct snd_opl3 {
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unsigned long l_port;
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unsigned long r_port;
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struct resource *res_l_port;
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struct resource *res_r_port;
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unsigned short hardware;
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/* hardware access */
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void (*command) (struct snd_opl3 * opl3, unsigned short cmd, unsigned char val);
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unsigned short timer_enable;
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int seq_dev_num; /* sequencer device number */
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struct snd_timer *timer1;
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struct snd_timer *timer2;
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spinlock_t timer_lock;
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void *private_data;
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void (*private_free)(struct snd_opl3 *);
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struct snd_hwdep *hwdep;
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spinlock_t reg_lock;
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struct snd_card *card; /* The card that this belongs to */
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unsigned char fm_mode; /* OPL mode, see SNDRV_DM_FM_MODE_XXX */
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unsigned char rhythm; /* percussion mode flag */
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unsigned char max_voices; /* max number of voices */
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#if IS_ENABLED(CONFIG_SND_SEQUENCER)
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#define SNDRV_OPL3_MODE_SYNTH 0 /* OSS - voices allocated by application */
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#define SNDRV_OPL3_MODE_SEQ 1 /* ALSA - driver handles voice allocation */
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int synth_mode; /* synth mode */
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int seq_client;
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struct snd_seq_device *seq_dev; /* sequencer device */
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struct snd_midi_channel_set * chset;
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#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
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struct snd_seq_device *oss_seq_dev; /* OSS sequencer device */
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struct snd_midi_channel_set * oss_chset;
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#endif
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#define OPL3_PATCH_HASH_SIZE 32
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struct fm_patch *patch_table[OPL3_PATCH_HASH_SIZE];
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struct snd_opl3_voice voices[MAX_OPL3_VOICES]; /* Voices (OPL3 'channel') */
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int use_time; /* allocation counter */
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unsigned short connection_reg; /* connection reg shadow */
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unsigned char drum_reg; /* percussion reg shadow */
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spinlock_t voice_lock; /* Lock for voice access */
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struct timer_list tlist; /* timer for note-offs and effects */
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int sys_timer_status; /* system timer run status */
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spinlock_t sys_timer_lock; /* Lock for system timer access */
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#endif
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};
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/* opl3.c */
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void snd_opl3_interrupt(struct snd_hwdep * hw);
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int snd_opl3_new(struct snd_card *card, unsigned short hardware,
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struct snd_opl3 **ropl3);
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int snd_opl3_init(struct snd_opl3 *opl3);
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int snd_opl3_create(struct snd_card *card,
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unsigned long l_port, unsigned long r_port,
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unsigned short hardware,
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int integrated,
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struct snd_opl3 ** opl3);
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int snd_opl3_timer_new(struct snd_opl3 * opl3, int timer1_dev, int timer2_dev);
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int snd_opl3_hwdep_new(struct snd_opl3 * opl3, int device, int seq_device,
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struct snd_hwdep ** rhwdep);
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/* opl3_synth */
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int snd_opl3_open(struct snd_hwdep * hw, struct file *file);
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int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
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unsigned int cmd, unsigned long arg);
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int snd_opl3_release(struct snd_hwdep * hw, struct file *file);
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void snd_opl3_reset(struct snd_opl3 * opl3);
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#if IS_ENABLED(CONFIG_SND_SEQUENCER)
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long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
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loff_t *offset);
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int snd_opl3_load_patch(struct snd_opl3 *opl3,
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int prog, int bank, int type,
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const char *name,
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const unsigned char *ext,
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const unsigned char *data);
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struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
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int create_patch);
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void snd_opl3_clear_patches(struct snd_opl3 *opl3);
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#else
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#define snd_opl3_write NULL
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static inline void snd_opl3_clear_patches(struct snd_opl3 *opl3) {}
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#endif
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#endif /* __SOUND_OPL3_H */
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