fb0ef52838
(I had been busy for my own research activity until the last weekend) Supported devices: SB Midi Port (sbc + midi) SB OPL3 (sbc + midi) 16550 UART (midi, needs a trick in your hint) CS461x Midi Port (csa + midi) OSS-compatible sequencer (seq) Supported playing software: playmidi (We definitely need more) Notes: /dev/midistat now reports installed midi drivers. /dev/sndstat reports only pcm drivers. We need the new name(pcmstat?). EMU8000(SB AWE) does not sound yet but does get probed so that the OPL3 synth on an AWE card works. TODO: MSS/PCI bridge drivers Midi-tty interface to support general serial devices Modules
1905 lines
48 KiB
C
1905 lines
48 KiB
C
/*
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* A low level driver for Yamaha YM3812 and OPL-3 -chips
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*
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* Copyright by Hannu Savolainen 1993
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* Major improvements to the FM handling 30AUG92 by Rob Hooft,
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*/
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/*
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* hooft@chem.ruu.nl
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*/
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/*
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*
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* Ported to the new Audio Driver by Luigi Rizzo:
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* (C) 1999 Seigo Tanimura
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*
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* This is the OPL2/3/4 chip driver for FreeBSD, based on the Luigi Sound Driver.
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* This handles io against /dev/midi, the midi {in, out}put event queues
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* and the event/message operation to the OPL chip.
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*
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* $FreeBSD$
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*
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*/
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#include "opt_devfs.h"
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#include <dev/sound/midi/midi.h>
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#include <dev/sound/chip.h>
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#include <isa/isavar.h>
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static devclass_t midi_devclass;
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#ifndef DDB
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#undef DDB
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#define DDB(x)
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#endif /* DDB */
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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 exeptions 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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/*
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* Register numbers for the global registers
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*/
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#define TEST_REGISTER 0x01
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#define ENABLE_WAVE_SELECT 0x20
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#define TIMER1_REGISTER 0x02
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#define TIMER2_REGISTER 0x03
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#define TIMER_CONTROL_REGISTER 0x04 /* Left side */
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#define IRQ_RESET 0x80
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#define TIMER1_MASK 0x40
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#define TIMER2_MASK 0x20
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#define TIMER1_START 0x01
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#define TIMER2_START 0x02
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#define CONNECTION_SELECT_REGISTER 0x04 /* Right side */
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#define RIGHT_4OP_0 0x01
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#define RIGHT_4OP_1 0x02
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#define RIGHT_4OP_2 0x04
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#define LEFT_4OP_0 0x08
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#define LEFT_4OP_1 0x10
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#define LEFT_4OP_2 0x20
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#define OPL3_MODE_REGISTER 0x05 /* Right side */
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#define OPL3_ENABLE 0x01
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#define OPL4_ENABLE 0x02
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#define KBD_SPLIT_REGISTER 0x08 /* Left side */
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#define COMPOSITE_SINE_WAVE_MODE 0x80 /* Don't use with OPL-3? */
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#define KEYBOARD_SPLIT 0x40
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#define PERCUSSION_REGISTER 0xbd /* Left side only */
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#define TREMOLO_DEPTH 0x80
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#define VIBRATO_DEPTH 0x40
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#define PERCUSSION_ENABLE 0x20
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#define BASSDRUM_ON 0x10
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#define SNAREDRUM_ON 0x08
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#define TOMTOM_ON 0x04
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#define CYMBAL_ON 0x02
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#define 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 AM_VIB 0x20
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#define TREMOLO_ON 0x80
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#define VIBRATO_ON 0x40
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#define SUSTAIN_ON 0x20
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#define KSR 0x10 /* Key scaling rate */
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#define 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 KSL_LEVEL 0x40
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#define KSL_MASK 0xc0 /* Envelope scaling bits */
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#define 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 ATTACK_DECAY 0x60
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#define ATTACK_MASK 0xf0
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#define 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 SUSTAIN_RELEASE 0x80
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#define SUSTAIN_MASK 0xf0
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#define 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 WAVE_SELECT 0xe0
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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 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 KEYON_BLOCK 0xb0
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#define KEYON_BIT 0x20
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#define BLOCKNUM_MASK 0x1c
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#define 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 halfs (gives 4 ways to connect the operators).
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*/
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#define FEEDBACK_CONNECTION 0xc0
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#define FEEDBACK_MASK 0x0e /* Valid just for 1st OP of a voice */
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#define 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 halfs.
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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 STEREO_BITS 0x30 /* OPL-3 only */
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#define VOICE_TO_LEFT 0x10
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#define VOICE_TO_RIGHT 0x20
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/*
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* Definition table for the physical voices
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*/
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struct physical_voice_info {
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unsigned char voice_num;
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unsigned char voice_mode; /* 0=unavailable, 2=2 OP, 4=4 OP */
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int ch; /* channel (left=USE_LEFT, right=USE_RIGHT) */
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unsigned char op[4]; /* Operator offsets */
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};
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/*
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* There is 18 possible 2 OP voices
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* (9 in the left and 9 in the right).
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* The first OP is the modulator and 2nd is the carrier.
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*
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* The first three voices in the both sides may be connected
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* with another voice to a 4 OP voice. For example voice 0
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* can be connected with voice 3. The operators of voice 3 are
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* used as operators 3 and 4 of the new 4 OP voice.
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* In this case the 2 OP voice number 0 is the 'first half' and
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* voice 3 is the second.
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*/
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#define USE_LEFT 0
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#define USE_RIGHT 1
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static struct physical_voice_info pv_map[18] =
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{
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/* No Mode Side OP1 OP2 OP3 OP4 */
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/* --------------------------------------------------- */
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{ 0, 2, USE_LEFT, {0x00, 0x03, 0x08, 0x0b}},
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{ 1, 2, USE_LEFT, {0x01, 0x04, 0x09, 0x0c}},
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{ 2, 2, USE_LEFT, {0x02, 0x05, 0x0a, 0x0d}},
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{ 3, 2, USE_LEFT, {0x08, 0x0b, 0x00, 0x00}},
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{ 4, 2, USE_LEFT, {0x09, 0x0c, 0x00, 0x00}},
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{ 5, 2, USE_LEFT, {0x0a, 0x0d, 0x00, 0x00}},
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{ 6, 2, USE_LEFT, {0x10, 0x13, 0x00, 0x00}}, /* Used by percussive voices */
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{ 7, 2, USE_LEFT, {0x11, 0x14, 0x00, 0x00}}, /* if the percussive mode */
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{ 8, 2, USE_LEFT, {0x12, 0x15, 0x00, 0x00}}, /* is selected */
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{ 0, 2, USE_RIGHT, {0x00, 0x03, 0x08, 0x0b}},
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{ 1, 2, USE_RIGHT, {0x01, 0x04, 0x09, 0x0c}},
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{ 2, 2, USE_RIGHT, {0x02, 0x05, 0x0a, 0x0d}},
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{ 3, 2, USE_RIGHT, {0x08, 0x0b, 0x00, 0x00}},
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{ 4, 2, USE_RIGHT, {0x09, 0x0c, 0x00, 0x00}},
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{ 5, 2, USE_RIGHT, {0x0a, 0x0d, 0x00, 0x00}},
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{ 6, 2, USE_RIGHT, {0x10, 0x13, 0x00, 0x00}},
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{ 7, 2, USE_RIGHT, {0x11, 0x14, 0x00, 0x00}},
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{ 8, 2, USE_RIGHT, {0x12, 0x15, 0x00, 0x00}}
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};
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/* These are the tuning parameters. */
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static unsigned short semitone_tuning[24] =
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{
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/* 0 */ 10000, 10595, 11225, 11892, 12599, 13348, 14142, 14983,
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/* 8 */ 15874, 16818, 17818, 18877, 20000, 21189, 22449, 23784,
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/* 16 */ 25198, 26697, 28284, 29966, 31748, 33636, 35636, 37755
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};
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static unsigned short cent_tuning[100] =
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{
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/* 0 */ 10000, 10006, 10012, 10017, 10023, 10029, 10035, 10041,
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/* 8 */ 10046, 10052, 10058, 10064, 10070, 10075, 10081, 10087,
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/* 16 */ 10093, 10099, 10105, 10110, 10116, 10122, 10128, 10134,
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/* 24 */ 10140, 10145, 10151, 10157, 10163, 10169, 10175, 10181,
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/* 32 */ 10187, 10192, 10198, 10204, 10210, 10216, 10222, 10228,
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/* 40 */ 10234, 10240, 10246, 10251, 10257, 10263, 10269, 10275,
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/* 48 */ 10281, 10287, 10293, 10299, 10305, 10311, 10317, 10323,
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/* 56 */ 10329, 10335, 10341, 10347, 10353, 10359, 10365, 10371,
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/* 64 */ 10377, 10383, 10389, 10395, 10401, 10407, 10413, 10419,
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/* 72 */ 10425, 10431, 10437, 10443, 10449, 10455, 10461, 10467,
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/* 80 */ 10473, 10479, 10485, 10491, 10497, 10503, 10509, 10515,
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/* 88 */ 10521, 10528, 10534, 10540, 10546, 10552, 10558, 10564,
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/* 96 */ 10570, 10576, 10582, 10589
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};
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/*
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* The next table looks magical, but it certainly is not. Its values have
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* been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
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* for i=0. This log-table converts a linear volume-scaling (0..127) to a
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* logarithmic scaling as present in the FM-synthesizer chips. so : Volume
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* 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
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* volume -8 it was implemented as a table because it is only 128 bytes and
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* it saves a lot of log() calculations. (RH)
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*/
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static char opl_volumetable[128] =
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{
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-64, -48, -40, -35, -32, -29, -27, -26,
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-24, -23, -21, -20, -19, -18, -18, -17,
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-16, -15, -15, -14, -13, -13, -12, -12,
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-11, -11, -10, -10, -10, -9, -9, -8,
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-8, -8, -7, -7, -7, -6, -6, -6,
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-5, -5, -5, -5, -4, -4, -4, -4,
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-3, -3, -3, -3, -2, -2, -2, -2,
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-2, -1, -1, -1, -1, 0, 0, 0,
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0, 0, 0, 1, 1, 1, 1, 1,
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1, 2, 2, 2, 2, 2, 2, 2,
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3, 3, 3, 3, 3, 3, 3, 4,
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4, 4, 4, 4, 4, 4, 4, 5,
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5, 5, 5, 5, 5, 5, 5, 5,
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6, 6, 6, 6, 6, 6, 6, 6,
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6, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 8, 8, 8, 8, 8};
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#define MAX_VOICE 18
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#define OFFS_4OP 11
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#define SBFM_MAXINSTR 256
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/* These are the OPL Models. */
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#define MODEL_NONE 0
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#define MODEL_OPL2 2
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#define MODEL_OPL3 3
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#define MODEL_OPL4 4
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/* These are the OPL Voice modes. */
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#define VOICE_NONE 0
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#define VOICE_2OP 2
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#define VOICE_4OP 4
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/* PnP IDs */
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static struct isa_pnp_id opl_ids[] = {
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{0x01200001, "@H@2001 FM Synthesizer"}, /* @H@2001 */
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{0x01100001, "@H@1001 FM Synthesizer"}, /* @H@1001 */
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#if notdef
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/* TODO: write bridge drivers for these devices. */
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{0x0000630e, "CSC0000 FM Synthesizer"}, /* CSC0000 */
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{0x68187316, "ESS1868 FM Synthesizer"}, /* ESS1868 */
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{0x79187316, "ESS1879 FM Synthesizer"}, /* ESS1879 */
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{0x2100a865, "YMH0021 FM Synthesizer"}, /* YMH0021 */
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{0x80719304, "ADS7180 FM Synthesizer"}, /* ADS7180 */
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{0x0300561e, "GRV0003 FM Synthesizer"}, /* GRV0003 */
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#endif /* notdef */
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};
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/* These are the default io bases. */
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static int opl_defaultiobase[] = {
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0x388,
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0x380,
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};
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/* These are the per-voice information. */
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struct voice_info {
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u_char keyon_byte;
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long bender;
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long bender_range;
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u_long orig_freq;
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u_long current_freq;
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int volume;
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int mode;
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};
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/* These are the synthesizer and the midi device information. */
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static struct synth_info opl_synthinfo = {
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"OPL FM Synthesizer",
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0,
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SYNTH_TYPE_FM,
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FM_TYPE_ADLIB,
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0,
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9,
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0,
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SBFM_MAXINSTR,
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0,
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};
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static struct midi_info opl_midiinfo = {
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"OPL FM Synthesizer",
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0,
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0,
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0,
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};
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/*
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* These functions goes into oplsynthdev_op_desc.
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*/
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static mdsy_killnote_t opl_killnote;
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static mdsy_setinstr_t opl_setinstr;
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static mdsy_startnote_t opl_startnote;
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static mdsy_reset_t opl_reset;
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static mdsy_hwcontrol_t opl_hwcontrol;
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static mdsy_loadpatch_t opl_loadpatch;
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static mdsy_panning_t opl_panning;
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static mdsy_aftertouch_t opl_aftertouch;
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static mdsy_controller_t opl_controller;
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static mdsy_patchmgr_t opl_patchmgr;
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static mdsy_bender_t opl_bender;
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static mdsy_allocvoice_t opl_allocvoice;
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static mdsy_setupvoice_t opl_setupvoice;
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static mdsy_sendsysex_t opl_sendsysex;
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static mdsy_prefixcmd_t opl_prefixcmd;
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static mdsy_volumemethod_t opl_volumemethod;
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/*
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* This is the synthdev_info for an OPL3 chip.
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*/
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static synthdev_info oplsynth_op_desc = {
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opl_killnote,
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opl_setinstr,
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opl_startnote,
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opl_reset,
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opl_hwcontrol,
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opl_loadpatch,
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opl_panning,
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opl_aftertouch,
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opl_controller,
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opl_patchmgr,
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opl_bender,
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opl_allocvoice,
|
|
opl_setupvoice,
|
|
opl_sendsysex,
|
|
opl_prefixcmd,
|
|
opl_volumemethod,
|
|
};
|
|
|
|
/* Here is the parameter structure per a device. */
|
|
struct opl_softc {
|
|
device_t dev; /* device information */
|
|
mididev_info *devinfo; /* midi device information */
|
|
|
|
struct resource *io; /* Base of io port */
|
|
int io_rid; /* Io resource ID */
|
|
|
|
int model; /* OPL model */
|
|
struct synth_info synthinfo; /* Synthesizer information */
|
|
|
|
struct sbi_instrument i_map[SBFM_MAXINSTR]; /* Instrument map */
|
|
struct sbi_instrument *act_i[SBFM_MAXINSTR]; /* Active instruments */
|
|
struct physical_voice_info pv_map[MAX_VOICE]; /* Physical voice map */
|
|
int cmask; /* Connection mask */
|
|
int lv_map[MAX_VOICE]; /* Level map */
|
|
struct voice_info voc[MAX_VOICE]; /* Voice information */
|
|
};
|
|
|
|
typedef struct opl_softc *sc_p;
|
|
|
|
/*
|
|
* These functions goes into opl_op_desc to get called
|
|
* from sound.c.
|
|
*/
|
|
|
|
static int opl_probe(device_t dev);
|
|
static int opl_probe1(sc_p scp);
|
|
static int opl_attach(device_t dev);
|
|
static int oplsbc_probe(device_t dev);
|
|
static int oplsbc_attach(device_t dev);
|
|
|
|
static d_open_t opl_open;
|
|
static d_close_t opl_close;
|
|
static d_read_t opl_read;
|
|
static d_write_t opl_write;
|
|
static d_ioctl_t opl_ioctl;
|
|
static midi_callback_t opl_callback;
|
|
|
|
/* These go to snddev_info. */
|
|
static mdsy_readraw_t opl_readraw;
|
|
static mdsy_writeraw_t opl_writeraw;
|
|
|
|
/* These functions are local. */
|
|
static void opl_startplay(sc_p scp);
|
|
static void opl_command(sc_p scp, int ch, int addr, u_int val);
|
|
static int opl_status(sc_p scp);
|
|
static void opl_enter4opmode(sc_p scp);
|
|
static void opl_storeinstr(sc_p scp, int instr_no, struct sbi_instrument *instr);
|
|
static void opl_calcvol(u_char *regbyte, int volume, int main_vol);
|
|
static void opl_setvoicevolume(sc_p scp, int voice, int volume, int main_vol);
|
|
static void opl_freqtofnum(int freq, int *block, int *fnum);
|
|
static int opl_bendpitch(sc_p scp, int voice, int val);
|
|
static int opl_notetofreq(int note_num);
|
|
static u_long opl_computefinetune(u_long base_freq, int bend, int range);
|
|
static int opl_allocres(sc_p scp, device_t dev);
|
|
static void opl_releaseres(sc_p scp, device_t dev);
|
|
|
|
/*
|
|
* This is the device descriptor for the midi device.
|
|
*/
|
|
static mididev_info opl_op_desc = {
|
|
"OPL FM Synthesizer",
|
|
|
|
SNDCARD_OPL,
|
|
|
|
opl_open,
|
|
opl_close,
|
|
opl_read,
|
|
opl_write,
|
|
opl_ioctl,
|
|
NULL,
|
|
|
|
opl_callback,
|
|
|
|
MIDI_BUFFSIZE, /* Queue Length */
|
|
|
|
0, /* XXX This is not an *audio* device! */
|
|
};
|
|
|
|
/*
|
|
* Here are the main functions to interact to the user process.
|
|
*/
|
|
|
|
static int
|
|
opl_probe(device_t dev)
|
|
{
|
|
sc_p scp;
|
|
int unit, i;
|
|
|
|
/* Check isapnp ids */
|
|
if (isa_get_logicalid(dev) != 0)
|
|
return (ISA_PNP_PROBE(device_get_parent(dev), dev, opl_ids));
|
|
|
|
scp = device_get_softc(dev);
|
|
unit = device_get_unit(dev);
|
|
|
|
device_set_desc(dev, opl_op_desc.name);
|
|
bzero(scp, sizeof(*scp));
|
|
|
|
DEB(printf("opl%d: probing.\n", unit));
|
|
|
|
scp->io_rid = 0;
|
|
scp->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &scp->io_rid, 0, ~0, 4, RF_ACTIVE);
|
|
if (opl_allocres(scp, dev)) {
|
|
/* We try the defaults in opl_defaultiobase. */
|
|
DEB(printf("opl%d: port is omitted, trying the defaults.\n", unit));
|
|
for (i = 0 ; i < sizeof(opl_defaultiobase) / sizeof(*opl_defaultiobase) ; i++) {
|
|
scp->io_rid = 0;
|
|
scp->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &scp->io_rid, opl_defaultiobase[i], opl_defaultiobase[i] + 1, 4, RF_ACTIVE);
|
|
if (scp->io != NULL) {
|
|
if (opl_probe1(scp))
|
|
opl_releaseres(scp, dev);
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
if (scp->io == NULL)
|
|
return (ENXIO);
|
|
} else if(opl_probe1(scp)) {
|
|
opl_releaseres(scp, dev);
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* We now have some kind of OPL. */
|
|
|
|
DEB(printf("opl%d: probed.\n", unit));
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* We do probe in this function. */
|
|
static int
|
|
opl_probe1(sc_p scp)
|
|
{
|
|
u_char stat1, stat2;
|
|
|
|
/* Reset the timers and the interrupt. */
|
|
opl_command(scp, USE_LEFT, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK);
|
|
opl_command(scp, USE_LEFT, TIMER_CONTROL_REGISTER, IRQ_RESET);
|
|
|
|
/* Read the status. */
|
|
stat1 = opl_status(scp);
|
|
if ((stat1 & 0xe0) != 0)
|
|
return (1);
|
|
|
|
/* Try firing the timer1. */
|
|
opl_command(scp, USE_LEFT, TIMER1_REGISTER, 0xff); /* Set the timer value. */
|
|
opl_command(scp, USE_LEFT, TIMER_CONTROL_REGISTER, TIMER1_START | TIMER2_MASK); /* Start the timer. */
|
|
DELAY(150); /* Wait for the timer. */
|
|
|
|
/* Read the status. */
|
|
stat2 = opl_status(scp);
|
|
|
|
/* Reset the timers and the interrupt. */
|
|
opl_command(scp, USE_LEFT, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK);
|
|
opl_command(scp, USE_LEFT, TIMER_CONTROL_REGISTER, IRQ_RESET);
|
|
|
|
if ((stat2 & 0xe0) != 0xc0)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
oplsbc_probe(device_t dev)
|
|
{
|
|
char *s;
|
|
sc_p scp;
|
|
struct sndcard_func *func;
|
|
|
|
/* The parent device has already been probed. */
|
|
|
|
func = device_get_ivars(dev);
|
|
if (func == NULL || func->func != SCF_SYNTH)
|
|
return (ENXIO);
|
|
|
|
s = "SB OPL FM Synthesizer";
|
|
|
|
scp = device_get_softc(dev);
|
|
bzero(scp, sizeof(*scp));
|
|
scp->io_rid = 2;
|
|
device_set_desc(dev, s);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_attach(device_t dev)
|
|
{
|
|
sc_p scp;
|
|
mididev_info *devinfo;
|
|
int unit, i, opl4_io, opl4_id;
|
|
struct resource *opl4;
|
|
u_char signature, tmp;
|
|
|
|
scp = device_get_softc(dev);
|
|
unit = device_get_unit(dev);
|
|
|
|
DEB(printf("opl%d: attaching.\n", unit));
|
|
|
|
/* Fill the softc for this unit. */
|
|
scp->dev = dev;
|
|
scp->devinfo = devinfo = &midi_info[unit];
|
|
|
|
/* Allocate other resources. */
|
|
if (opl_allocres(scp, dev)) {
|
|
opl_releaseres(scp, dev);
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* Detect the OPL type. */
|
|
signature = opl_status(scp);
|
|
if (signature == 0x06)
|
|
scp->model = MODEL_OPL2;
|
|
else {
|
|
/* OPL3 or later, might be OPL4. */
|
|
|
|
/* Enable OPL3 and OPL4. */
|
|
opl_command(scp, USE_RIGHT, OPL3_MODE_REGISTER, 0);
|
|
opl_command(scp, USE_RIGHT, OPL3_MODE_REGISTER, OPL3_ENABLE | OPL4_ENABLE);
|
|
|
|
tmp = opl_status(scp);
|
|
if (tmp != 0x02)
|
|
scp->model = MODEL_OPL3;
|
|
#if notdef
|
|
else {
|
|
#endif /* notdef */
|
|
/* Alloc OPL4 ID register. */
|
|
opl4_id = 2;
|
|
opl4_io = rman_get_start(scp->io) - 8;
|
|
opl4 = bus_alloc_resource(dev, SYS_RES_IOPORT, &opl4_id, opl4_io, opl4_io + 1, 2, RF_ACTIVE);
|
|
if (opl4 != NULL) {
|
|
/* Select OPL4 ID register. */
|
|
bus_space_write_1(rman_get_bustag(opl4), rman_get_bushandle(opl4), 0, 0x02);
|
|
DELAY(10);
|
|
tmp = bus_space_read_1(rman_get_bustag(opl4), rman_get_bushandle(opl4), 1);
|
|
DELAY(10);
|
|
|
|
if (tmp != 0x20)
|
|
scp->model = MODEL_OPL3;
|
|
else {
|
|
scp->model = MODEL_OPL4;
|
|
|
|
/* Select back OPL4 FM mixer control. */
|
|
bus_space_write_1(rman_get_bustag(opl4), rman_get_bushandle(opl4), 0, 0xf8);
|
|
DELAY(10);
|
|
bus_space_write_1(rman_get_bustag(opl4), rman_get_bushandle(opl4), 1, 0x1b);
|
|
DELAY(10);
|
|
}
|
|
bus_release_resource(dev, SYS_RES_IOPORT, opl4_id, opl4);
|
|
}
|
|
#if notdef
|
|
}
|
|
#endif /* notdef */
|
|
opl_command(scp, USE_RIGHT, OPL3_MODE_REGISTER, 0);
|
|
}
|
|
|
|
/* Kill any previous notes. */
|
|
for (i = 0 ; i < 9 ; i++)
|
|
opl_command(scp, USE_RIGHT, KEYON_BLOCK + i, 0);
|
|
|
|
/* Select melodic mode. */
|
|
opl_command(scp, USE_LEFT, TEST_REGISTER, ENABLE_WAVE_SELECT);
|
|
opl_command(scp, USE_LEFT, PERCUSSION_REGISTER, 0);
|
|
|
|
for (i = 0 ; i < SBFM_MAXINSTR ; i++)
|
|
scp->i_map[i].channel = -1;
|
|
|
|
/* Fill the softc. */
|
|
bcopy(&opl_synthinfo, &scp->synthinfo, sizeof(opl_synthinfo));
|
|
snprintf(scp->synthinfo.name, 64, "Yamaha OPL%d FM", scp->model);
|
|
bcopy(pv_map, scp->pv_map, sizeof(pv_map));
|
|
if (scp->model < MODEL_OPL3) { /* OPL2. */
|
|
scp->synthinfo.nr_voices = 9;
|
|
scp->synthinfo.nr_drums = 0;
|
|
for (i = 0 ; i < MAX_VOICE ; i++)
|
|
scp->pv_map[i].ch = USE_LEFT;
|
|
} else { /* OPL3 or later. */
|
|
scp->synthinfo.capabilities |= SYNTH_CAP_OPL3;
|
|
scp->synthinfo.nr_voices = 18;
|
|
scp->synthinfo.nr_drums = 0;
|
|
#if notdef
|
|
for (i = 0 ; i < MAX_VOICE ; i++) {
|
|
if (scp->pv_map[i].ch == USE_LEFT)
|
|
scp->pv_map[i].ch = USE_LEFT;
|
|
else
|
|
scp->pv_map[i].ch = USE_RIGHT;
|
|
}
|
|
#endif /* notdef */
|
|
opl_command(scp, USE_RIGHT, OPL3_MODE_REGISTER, OPL3_ENABLE);
|
|
opl_command(scp, USE_RIGHT, CONNECTION_SELECT_REGISTER, 0);
|
|
}
|
|
|
|
/* Fill the midi info. */
|
|
bcopy(&opl_op_desc, devinfo, sizeof(opl_op_desc));
|
|
midiinit(devinfo, dev);
|
|
devinfo->flags = 0;
|
|
bcopy(&oplsynth_op_desc, &devinfo->synth, sizeof(oplsynth_op_desc));
|
|
devinfo->synth.readraw = opl_readraw;
|
|
devinfo->synth.writeraw = opl_writeraw;
|
|
devinfo->synth.alloc.max_voice = scp->synthinfo.nr_voices;
|
|
strcpy(devinfo->name, scp->synthinfo.name);
|
|
snprintf(devinfo->midistat, sizeof(devinfo->midistat), "at 0x%x", (u_int)rman_get_start(scp->io));
|
|
|
|
/* Init the queue. */
|
|
devinfo->midi_dbuf_in.unit_size = devinfo->midi_dbuf_out.unit_size = 1;
|
|
midibuf_init(&devinfo->midi_dbuf_in);
|
|
midibuf_init(&devinfo->midi_dbuf_out);
|
|
|
|
/* Increase the number of the synthesizers. */
|
|
nsynth++;
|
|
|
|
DEB(printf("opl%d: attached.\n", unit));
|
|
DEB(printf("opl%d: the chip is OPL%d.\n", unit, scp->model));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
oplsbc_attach(device_t dev)
|
|
{
|
|
return (opl_attach(dev));
|
|
}
|
|
|
|
static int
|
|
opl_open(dev_t i_dev, int flags, int mode, struct proc *p)
|
|
{
|
|
sc_p scp;
|
|
mididev_info *devinfo;
|
|
int unit, i;
|
|
|
|
unit = MIDIUNIT(i_dev);
|
|
|
|
DEB(printf("opl%d: opening.\n", unit));
|
|
|
|
if (unit >= nmidi + nsynth) {
|
|
DEB(printf("opl_open: unit %d does not exist.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
|
|
devinfo = get_mididev_info(i_dev, &unit);
|
|
if (devinfo == NULL) {
|
|
DEB(printf("opl_open: unit %d is not configured.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
scp = devinfo->softc;
|
|
|
|
if (scp->model < MODEL_OPL3)
|
|
devinfo->synth.alloc.max_voice = 9;
|
|
else
|
|
devinfo->synth.alloc.max_voice = 18;
|
|
devinfo->synth.alloc.timestamp = 0;
|
|
for (i = 0 ; i < MAX_VOICE ; i++) {
|
|
devinfo->synth.alloc.map[i] = 0;
|
|
devinfo->synth.alloc.alloc_times[i] = 0;
|
|
}
|
|
scp->cmask = 0; /* We are in 2 OP mode initially. */
|
|
if (scp->model >= MODEL_OPL3)
|
|
opl_command(scp, USE_RIGHT, CONNECTION_SELECT_REGISTER, scp->cmask);
|
|
|
|
DEB(printf("opl%d: opened.\n", unit));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_close(dev_t i_dev, int flags, int mode, struct proc *p)
|
|
{
|
|
sc_p scp;
|
|
mididev_info *devinfo;
|
|
int unit;
|
|
|
|
unit = MIDIUNIT(i_dev);
|
|
|
|
DEB(printf("opl%d: closing.\n", unit));
|
|
|
|
if (unit >= nmidi + nsynth) {
|
|
DEB(printf("opl_close: unit %d does not exist.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
|
|
devinfo = get_mididev_info(i_dev, &unit);
|
|
if (devinfo == NULL) {
|
|
DEB(printf("opl_close: unit %d is not configured.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
scp = devinfo->softc;
|
|
|
|
if (scp->model < MODEL_OPL3)
|
|
devinfo->synth.alloc.max_voice = 9;
|
|
else
|
|
devinfo->synth.alloc.max_voice = 18;
|
|
|
|
/* Stop the OPL. */
|
|
opl_reset(scp->devinfo);
|
|
|
|
DEB(printf("opl%d: closed.\n", unit));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_read(dev_t i_dev, struct uio *buf, int flag)
|
|
{
|
|
sc_p scp;
|
|
mididev_info *devinfo;
|
|
int unit, ret;
|
|
|
|
unit = MIDIUNIT(i_dev);
|
|
|
|
if (unit >= nmidi + nsynth) {
|
|
DEB(printf("opl_read: unit %d does not exist.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
|
|
devinfo = get_mididev_info(i_dev, &unit);
|
|
if (devinfo == NULL) {
|
|
DEB(printf("opl_read: unit %d is not configured.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
scp = devinfo->softc;
|
|
if ((devinfo->fflags & FREAD) == 0) {
|
|
DEB(printf("opl_read: unit %d is not for reading.\n", unit));
|
|
return (EIO);
|
|
}
|
|
|
|
/* Drain the data. */
|
|
midibuf_init(&devinfo->midi_dbuf_in);
|
|
ret = 0;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
opl_write(dev_t i_dev, struct uio *buf, int flag)
|
|
{
|
|
sc_p scp;
|
|
mididev_info *devinfo;
|
|
int unit, ret;
|
|
|
|
unit = MIDIUNIT(i_dev);
|
|
|
|
if (unit >= nmidi + nsynth) {
|
|
DEB(printf("opl_write: unit %d does not exist.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
|
|
devinfo = get_mididev_info(i_dev, &unit);
|
|
if (devinfo == NULL) {
|
|
DEB(printf("opl_write: unit %d is not configured.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
scp = devinfo->softc;
|
|
if ((devinfo->fflags & FWRITE) == 0) {
|
|
DEB(printf("opl_write: unit %d is not for writing.\n", unit));
|
|
return (EIO);
|
|
}
|
|
|
|
/* Drain the data. */
|
|
midibuf_init(&devinfo->midi_dbuf_out);
|
|
midibuf_init(&devinfo->midi_dbuf_passthru);
|
|
ret = 0;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
opl_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc *p)
|
|
{
|
|
sc_p scp;
|
|
mididev_info *devinfo;
|
|
int unit;
|
|
struct synth_info *synthinfo;
|
|
struct midi_info *midiinfo;
|
|
struct sbi_instrument ins;
|
|
|
|
unit = MIDIUNIT(i_dev);
|
|
|
|
DEB(printf("opl%d: ioctlling, cmd 0x%x.\n", unit, (int)cmd));
|
|
|
|
if (unit >= nmidi + nsynth) {
|
|
DEB(printf("opl_ioctl: unit %d does not exist.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
|
|
devinfo = get_mididev_info(i_dev, &unit);
|
|
if (devinfo == NULL) {
|
|
DEB(printf("opl_ioctl: unit %d is not configured.\n", unit));
|
|
return (ENXIO);
|
|
}
|
|
scp = devinfo->softc;
|
|
|
|
switch (cmd) {
|
|
case SNDCTL_SYNTH_INFO:
|
|
synthinfo = (struct synth_info *)arg;
|
|
if (synthinfo->device >= nmidi + nsynth || synthinfo->device != unit)
|
|
return (ENXIO);
|
|
bcopy(&scp->synthinfo, synthinfo, sizeof(scp->synthinfo));
|
|
synthinfo->device = unit;
|
|
if (devinfo->synth.alloc.max_voice == 12)
|
|
synthinfo->nr_voices = 6;
|
|
else
|
|
synthinfo->nr_voices = devinfo->synth.alloc.max_voice;
|
|
return (0);
|
|
break;
|
|
case SNDCTL_MIDI_INFO:
|
|
midiinfo = (struct midi_info *)arg;
|
|
if (midiinfo->device >= nmidi + nsynth || midiinfo->device != unit)
|
|
return (ENXIO);
|
|
bcopy(&opl_midiinfo, midiinfo, sizeof(opl_midiinfo));
|
|
strcpy(midiinfo->name, scp->synthinfo.name);
|
|
midiinfo->device = unit;
|
|
return (0);
|
|
break;
|
|
case SNDCTL_FM_LOAD_INSTR:
|
|
bcopy(arg, &ins, sizeof(ins));
|
|
if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR) {
|
|
printf("opl_ioctl: Instrument number %d is not valid.\n", ins.channel);
|
|
return (EINVAL);
|
|
}
|
|
#if notyet
|
|
pmgr_inform(scp, PM_E_PATCH_LOADED, inc.channel, 0, 0, 0);
|
|
#endif /* notyet */
|
|
opl_storeinstr(scp, ins.channel, &ins);
|
|
return (0);
|
|
break;
|
|
case SNDCTL_SYNTH_MEMAVL:
|
|
return 0x7fffffff;
|
|
break;
|
|
case SNDCTL_FM_4OP_ENABLE:
|
|
if (scp->model >= MODEL_OPL3)
|
|
opl_enter4opmode(scp);
|
|
return (0);
|
|
break;
|
|
default:
|
|
return (ENOSYS);
|
|
}
|
|
/* NOTREACHED */
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
opl_callback(mididev_info *devinfo, int reason)
|
|
{
|
|
int unit;
|
|
sc_p scp;
|
|
|
|
if (devinfo == NULL) {
|
|
DEB(printf("opl_callback: device not configured.\n"));
|
|
return (ENXIO);
|
|
}
|
|
|
|
unit = devinfo->unit;
|
|
scp = devinfo->softc;
|
|
|
|
DEB(printf("opl%d: callback, reason 0x%x.\n", unit, reason));
|
|
|
|
switch (reason & MIDI_CB_REASON_MASK) {
|
|
case MIDI_CB_START:
|
|
if ((reason & MIDI_CB_RD) != 0 && (devinfo->flags & MIDI_F_READING) == 0)
|
|
/* Begin recording. */
|
|
devinfo->flags |= MIDI_F_READING;
|
|
if ((reason & MIDI_CB_WR) != 0 && (devinfo->flags & MIDI_F_WRITING) == 0)
|
|
/* Start playing. */
|
|
devinfo->flags |= MIDI_F_WRITING;
|
|
break;
|
|
case MIDI_CB_STOP:
|
|
case MIDI_CB_ABORT:
|
|
if ((reason & MIDI_CB_RD) != 0 && (devinfo->flags & MIDI_F_READING) != 0)
|
|
/* Stop recording. */
|
|
devinfo->flags &= ~MIDI_F_READING;
|
|
if ((reason & MIDI_CB_WR) != 0 && (devinfo->flags & MIDI_F_WRITING) != 0)
|
|
/* Stop Playing. */
|
|
devinfo->flags &= ~MIDI_F_WRITING;
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_readraw(mididev_info *md, u_char *buf, int len, int nonblock)
|
|
{
|
|
sc_p scp;
|
|
int unit;
|
|
|
|
if (md == NULL)
|
|
return (ENXIO);
|
|
unit = md->unit;
|
|
scp = md->softc;
|
|
if ((md->fflags & FREAD) == 0) {
|
|
DEB(printf("opl_readraw: unit %d is not for reading.\n", unit));
|
|
return (EIO);
|
|
}
|
|
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_writeraw(mididev_info *md, u_char *buf, int len, int nonblock)
|
|
{
|
|
sc_p scp;
|
|
int unit;
|
|
|
|
if (md == NULL)
|
|
return (ENXIO);
|
|
unit = md->unit;
|
|
scp = md->softc;
|
|
if ((md->fflags & FWRITE) == 0) {
|
|
DEB(printf("opl_writeraw: unit %d is not for writing.\n", unit));
|
|
return (EIO);
|
|
}
|
|
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
/* The functions below here are the synthesizer interfaces. */
|
|
|
|
static int
|
|
opl_killnote(mididev_info *md, int voice, int note, int vel)
|
|
{
|
|
int unit;
|
|
sc_p scp;
|
|
struct physical_voice_info *map;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: killing a note, voice %d, note %d, vel %d.\n", unit, voice, note, vel));
|
|
|
|
if (voice < 0 || voice >= md->synth.alloc.max_voice)
|
|
return (0);
|
|
|
|
md->synth.alloc.map[voice] = 0;
|
|
map = &scp->pv_map[scp->lv_map[voice]];
|
|
|
|
if (map->voice_mode == VOICE_NONE)
|
|
return (0);
|
|
|
|
opl_command(scp, map->ch, KEYON_BLOCK + map->voice_num, scp->voc[voice].keyon_byte & ~0x20);
|
|
|
|
scp->voc[voice].keyon_byte = 0;
|
|
scp->voc[voice].bender = 0;
|
|
scp->voc[voice].volume = 64;
|
|
scp->voc[voice].bender_range = 200;
|
|
scp->voc[voice].orig_freq = 0;
|
|
scp->voc[voice].current_freq = 0;
|
|
scp->voc[voice].mode = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_setinstr(mididev_info *md, int voice, int instr_no)
|
|
{
|
|
int unit;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: setting an instrument, voice %d, instr_no %d.\n", unit, voice, instr_no));
|
|
|
|
|
|
if (voice < 0 || voice >= md->synth.alloc.max_voice || instr_no < 0 || instr_no >= SBFM_MAXINSTR)
|
|
return (0);
|
|
|
|
scp->act_i[voice] = &scp->i_map[instr_no];
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_startnote(mididev_info *md, int voice, int note, int volume)
|
|
{
|
|
u_char fpc;
|
|
int unit, block, fnum, freq, voice_mode, voice_shift;
|
|
struct sbi_instrument *instr;
|
|
struct physical_voice_info *map;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: starting a note, voice %d, note %d, volume %d.\n", unit, voice, note, volume));
|
|
|
|
if (voice < 0 || voice >= md->synth.alloc.max_voice)
|
|
return (0);
|
|
|
|
map = &scp->pv_map[scp->lv_map[voice]];
|
|
if (map->voice_mode == VOICE_NONE)
|
|
return (0);
|
|
|
|
if (note == 255) {
|
|
/* Change the volume. */
|
|
opl_setvoicevolume(scp, voice, volume, scp->voc[voice].volume);
|
|
return (0);
|
|
}
|
|
|
|
/* Kill the previous note. */
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[1], 0xff); /* Carrier volume */
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[0], 0xff); /* Modulator volume */
|
|
if (map->voice_mode == VOICE_4OP) {
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[3], 0xff); /* Carrier volume */
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[2], 0xff); /* Modulator volume */
|
|
}
|
|
opl_command(scp, map->ch, KEYON_BLOCK + map->voice_num, 0); /* Note off. */
|
|
|
|
instr = scp->act_i[voice];
|
|
if (instr == NULL)
|
|
instr = &scp->i_map[0];
|
|
if (instr->channel < 0) {
|
|
printf("opl_startnote: the instrument for voice %d is undefined.\n", voice);
|
|
return (0);
|
|
}
|
|
if (map->voice_mode == VOICE_2OP && instr->key == OPL3_PATCH) {
|
|
printf("opl_startnote: the voice mode %d mismatches the key 0x%x.\n", map->voice_mode, instr->key);
|
|
return (0);
|
|
}
|
|
|
|
voice_mode = map->voice_mode;
|
|
if (voice_mode == VOICE_4OP) {
|
|
if (map->ch == USE_LEFT)
|
|
voice_shift = 0;
|
|
else
|
|
voice_shift = 3;
|
|
voice_shift += map->voice_num;
|
|
if (instr->key != OPL3_PATCH) {
|
|
voice_mode = VOICE_2OP;
|
|
scp->cmask &= ~(1 << voice_shift);
|
|
} else
|
|
scp->cmask |= 1 << voice_shift;
|
|
|
|
opl_command(scp, USE_RIGHT, CONNECTION_SELECT_REGISTER, scp->cmask);
|
|
}
|
|
|
|
/* Set the sound characteristics, attack, decay, sustain, release, wave select, feedback, connection. */
|
|
opl_command(scp, map->ch, AM_VIB + map->op[0], instr->operators[0]); /* Sound characteristics. */
|
|
opl_command(scp, map->ch, AM_VIB + map->op[1], instr->operators[1]);
|
|
opl_command(scp, map->ch, ATTACK_DECAY + map->op[0], instr->operators[4]); /* Attack and decay. */
|
|
opl_command(scp, map->ch, ATTACK_DECAY + map->op[1], instr->operators[5]);
|
|
opl_command(scp, map->ch, SUSTAIN_RELEASE + map->op[0], instr->operators[6]); /* Sustain and release. */
|
|
opl_command(scp, map->ch, SUSTAIN_RELEASE + map->op[1], instr->operators[7]);
|
|
opl_command(scp, map->ch, WAVE_SELECT + map->op[0], instr->operators[8]); /* Wave select. */
|
|
opl_command(scp, map->ch, WAVE_SELECT + map->op[1], instr->operators[9]);
|
|
fpc = instr->operators[10];
|
|
if ((fpc & 0x30) == 0)
|
|
fpc |= 0x30; /* So that at least one channel is enabled. */
|
|
opl_command(scp, map->ch, FEEDBACK_CONNECTION + map->voice_num, fpc); /* Feedback and connection. */
|
|
|
|
if (voice_mode == VOICE_4OP) {
|
|
/* Do not forget the operators 3 and 4. */
|
|
opl_command(scp, map->ch, AM_VIB + map->op[2], instr->operators[OFFS_4OP + 0]); /* Sound characteristics. */
|
|
opl_command(scp, map->ch, AM_VIB + map->op[3], instr->operators[OFFS_4OP + 1]);
|
|
opl_command(scp, map->ch, ATTACK_DECAY + map->op[2], instr->operators[OFFS_4OP + 4]); /* Attack and decay. */
|
|
opl_command(scp, map->ch, ATTACK_DECAY + map->op[3], instr->operators[OFFS_4OP + 5]);
|
|
opl_command(scp, map->ch, SUSTAIN_RELEASE + map->op[2], instr->operators[OFFS_4OP + 6]); /* Sustain and release. */
|
|
opl_command(scp, map->ch, SUSTAIN_RELEASE + map->op[3], instr->operators[OFFS_4OP + 7]);
|
|
opl_command(scp, map->ch, WAVE_SELECT + map->op[2], instr->operators[OFFS_4OP + 8]); /* Wave select. */
|
|
opl_command(scp, map->ch, WAVE_SELECT + map->op[3], instr->operators[OFFS_4OP + 9]);
|
|
fpc = instr->operators[OFFS_4OP + 10];
|
|
if ((fpc & 0x30) == 0)
|
|
fpc |= 0x30; /* So that at least one channel is enabled. */
|
|
opl_command(scp, map->ch, FEEDBACK_CONNECTION + map->voice_num + 3, fpc); /* Feedback and connection. */
|
|
}
|
|
scp->voc[voice].mode = voice_mode;
|
|
|
|
opl_setvoicevolume(scp, voice, volume, scp->voc[voice].volume);
|
|
|
|
/* Calcurate the frequency. */
|
|
scp->voc[voice].orig_freq = opl_notetofreq(note) / 1000;
|
|
/* Tune for the pitch bend. */
|
|
freq = scp->voc[voice].current_freq = opl_computefinetune(scp->voc[voice].orig_freq, scp->voc[voice].bender, scp->voc[voice].bender_range);
|
|
opl_freqtofnum(freq, &block, &fnum);
|
|
|
|
/* Now we can play the note. */
|
|
opl_command(scp, map->ch, FNUM_LOW + map->voice_num, fnum & 0xff);
|
|
scp->voc[voice].keyon_byte = 0x20 | ((block & 0x07) << 2) | ((fnum >> 8) & 0x03);
|
|
opl_command(scp, map->ch, KEYON_BLOCK + map->voice_num, scp->voc[voice].keyon_byte);
|
|
if (voice_mode == VOICE_4OP)
|
|
opl_command(scp, map->ch, KEYON_BLOCK + map->voice_num + 3, scp->voc[voice].keyon_byte);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_reset(mididev_info *md)
|
|
{
|
|
int unit, i;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: resetting.\n", unit));
|
|
|
|
for (i = 0 ; i < MAX_VOICE ; i++)
|
|
scp->lv_map[i] = i;
|
|
|
|
for (i = 0 ; i < md->synth.alloc.max_voice ; i++) {
|
|
opl_command(scp, scp->pv_map[scp->lv_map[i]].ch, KSL_LEVEL + scp->pv_map[scp->lv_map[i]].op[0], 0xff);
|
|
opl_command(scp, scp->pv_map[scp->lv_map[i]].ch, KSL_LEVEL + scp->pv_map[scp->lv_map[i]].op[1], 0xff);
|
|
if (scp->pv_map[scp->lv_map[i]].voice_mode == VOICE_4OP) {
|
|
opl_command(scp, scp->pv_map[scp->lv_map[i]].ch, KSL_LEVEL + scp->pv_map[scp->lv_map[i]].op[2], 0xff);
|
|
opl_command(scp, scp->pv_map[scp->lv_map[i]].ch, KSL_LEVEL + scp->pv_map[scp->lv_map[i]].op[3], 0xff);
|
|
}
|
|
opl_killnote(md, i, 0, 64);
|
|
}
|
|
if (scp->model >= MODEL_OPL3) {
|
|
md->synth.alloc.max_voice = 18;
|
|
for (i = 0 ; i < MAX_VOICE ; i++)
|
|
scp->pv_map[i].voice_mode = VOICE_2OP;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_hwcontrol(mididev_info *md, u_char *event)
|
|
{
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_loadpatch(mididev_info *md, int format, struct uio *buf, int offs, int count, int pmgr_flag)
|
|
{
|
|
int unit;
|
|
struct sbi_instrument ins;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
if (count < sizeof(ins)) {
|
|
printf("opl_loadpatch: The patch record is too short.\n");
|
|
return (EINVAL);
|
|
}
|
|
if (uiomove(&((char *)&ins)[offs], sizeof(ins) - offs, buf) != 0)
|
|
printf("opl_loadpatch: User memory mangled?\n");
|
|
if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR) {
|
|
printf("opl_loadpatch: Instrument number %d is not valid.\n", ins.channel);
|
|
return (EINVAL);
|
|
}
|
|
ins.key = format;
|
|
|
|
opl_storeinstr(scp, ins.channel, &ins);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_panning(mididev_info *md, int chn, int pan)
|
|
{
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
#define SET_VIBRATO(cell) { \
|
|
int tmp; \
|
|
tmp = instr->operators[(cell-1)+(((cell-1)/2)*OFFS_4OP)]; \
|
|
if (press > 110) \
|
|
tmp |= 0x40; /* Vibrato on */ \
|
|
opl_command(scp, map->ch, AM_VIB + map->op[cell-1], tmp);}
|
|
|
|
static int
|
|
opl_aftertouch(mididev_info *md, int voice, int press)
|
|
{
|
|
int unit, connection;
|
|
struct sbi_instrument *instr;
|
|
struct physical_voice_info *map;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: setting the aftertouch, voice %d, press %d.\n", unit, voice, press));
|
|
|
|
if (voice < 0 || voice >= md->synth.alloc.max_voice)
|
|
return (0);
|
|
|
|
map = &scp->pv_map[scp->lv_map[voice]];
|
|
if (map->voice_mode == VOICE_NONE)
|
|
return (0);
|
|
|
|
/* Adjust the vibrato. */
|
|
instr = scp->act_i[voice];
|
|
if (instr == NULL)
|
|
instr = &scp->i_map[0];
|
|
|
|
if (scp->voc[voice].mode == VOICE_4OP) {
|
|
connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
|
|
switch (connection) {
|
|
case 0:
|
|
SET_VIBRATO(4);
|
|
break;
|
|
case 1:
|
|
SET_VIBRATO(2);
|
|
SET_VIBRATO(4);
|
|
break;
|
|
case 2:
|
|
SET_VIBRATO(1);
|
|
SET_VIBRATO(4);
|
|
break;
|
|
case 3:
|
|
SET_VIBRATO(1);
|
|
SET_VIBRATO(3);
|
|
SET_VIBRATO(4);
|
|
break;
|
|
}
|
|
} else {
|
|
SET_VIBRATO(1);
|
|
if ((instr->operators[10] & 0x01))
|
|
SET_VIBRATO(2);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_bendpitch(sc_p scp, int voice, int value)
|
|
{
|
|
int unit, block, fnum, freq;
|
|
struct physical_voice_info *map;
|
|
mididev_info *md;
|
|
|
|
md = scp->devinfo;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: setting the pitch bend, voice %d, value %d.\n", unit, voice, value));
|
|
|
|
map = &scp->pv_map[scp->lv_map[voice]];
|
|
if (map->voice_mode == 0)
|
|
return (0);
|
|
scp->voc[voice].bender = value;
|
|
if (value == 0)
|
|
return (0);
|
|
if ((scp->voc[voice].keyon_byte & 0x20) == 0)
|
|
return (0);
|
|
|
|
freq = opl_computefinetune(scp->voc[voice].orig_freq, scp->voc[voice].bender, scp->voc[voice].bender_range);
|
|
scp->voc[voice].current_freq = freq;
|
|
|
|
opl_freqtofnum(freq, &block, &fnum);
|
|
|
|
opl_command(scp, map->ch, FNUM_LOW + map->voice_num, fnum & 0xff);
|
|
scp->voc[voice].keyon_byte = 0x20 | ((block & 0x07) << 2) | ((fnum >> 8) & 0x03);
|
|
opl_command(scp, map->ch, KEYON_BLOCK + map->voice_num, scp->voc[voice].keyon_byte);
|
|
if (map->voice_mode == VOICE_4OP)
|
|
opl_command(scp, map->ch, KEYON_BLOCK + map->voice_num + 3, scp->voc[voice].keyon_byte);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_controller(mididev_info *md, int voice, int ctrlnum, int val)
|
|
{
|
|
int unit;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
unit = md->unit;
|
|
|
|
DEB(printf("opl%d: setting the controller, voice %d, ctrlnum %d, val %d.\n", unit, voice, ctrlnum, val));
|
|
|
|
if (voice < 0 || voice >= md->synth.alloc.max_voice)
|
|
return (0);
|
|
|
|
switch (ctrlnum) {
|
|
case CTRL_PITCH_BENDER:
|
|
opl_bendpitch(scp, voice, val);
|
|
break;
|
|
case CTRL_PITCH_BENDER_RANGE:
|
|
scp->voc[voice].bender_range = val;
|
|
break;
|
|
case CTRL_MAIN_VOLUME:
|
|
scp->voc[voice].volume = val / 128;
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_patchmgr(mididev_info *md, struct patmgr_info *rec)
|
|
{
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
opl_bender(mididev_info *md, int voice, int val)
|
|
{
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
|
|
if (voice < 0 || voice >= md->synth.alloc.max_voice)
|
|
return (0);
|
|
|
|
return opl_bendpitch(scp, voice, val - 8192);
|
|
}
|
|
|
|
static int
|
|
opl_allocvoice(mididev_info *md, int chn, int note, struct voice_alloc_info *alloc)
|
|
{
|
|
int i, p, best, first, avail, best_time, is4op, instr_no;
|
|
struct sbi_instrument *instr;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
|
|
DEB(printf("opl%d: allocating a voice, chn %d, note %d.\n", unit, chn, note));
|
|
|
|
best_time = 0x7fffffff;
|
|
|
|
if (chn < 0 || chn >= 15)
|
|
instr_no = 0;
|
|
else
|
|
instr_no = md->synth.chn_info[chn].pgm_num;
|
|
|
|
instr = &scp->i_map[instr_no];
|
|
if (instr->channel < 0 || md->synth.alloc.max_voice != 12)
|
|
is4op = 0;
|
|
else if (md->synth.alloc.max_voice == 12) {
|
|
if (instr->key == OPL3_PATCH)
|
|
is4op = 1;
|
|
else
|
|
is4op = 0;
|
|
} else
|
|
is4op = 0;
|
|
|
|
if (is4op) {
|
|
first = p = 0;
|
|
avail = 6;
|
|
} else {
|
|
if (md->synth.alloc.max_voice == 12)
|
|
first = p = 6;
|
|
else
|
|
first = p = 0;
|
|
avail = md->synth.alloc.max_voice;
|
|
}
|
|
|
|
/* Look up a free voice. */
|
|
best = first;
|
|
|
|
for (i = 0 ; i < avail ; i++) {
|
|
if (alloc->map[p] == 0)
|
|
return (p);
|
|
}
|
|
if (alloc->alloc_times[p] < best_time) {
|
|
best_time = alloc->alloc_times[p];
|
|
best = p;
|
|
}
|
|
p = (p + 1) % avail;
|
|
|
|
if (best < 0)
|
|
best = 0;
|
|
else if (best > md->synth.alloc.max_voice)
|
|
best -= md->synth.alloc.max_voice;
|
|
|
|
return best;
|
|
}
|
|
|
|
static int
|
|
opl_setupvoice(mididev_info *md, int voice, int chn)
|
|
{
|
|
struct channel_info *info;
|
|
sc_p scp;
|
|
|
|
scp = md->softc;
|
|
|
|
DEB(printf("opl%d: setting up a voice, voice %d, chn %d.\n", unit, voice, chn));
|
|
|
|
info = &md->synth.chn_info[chn];
|
|
|
|
opl_setinstr(md, voice, info->pgm_num);
|
|
scp->voc[voice].bender = info->bender_value;
|
|
scp->voc[voice].volume = info->controllers[CTL_MAIN_VOLUME];
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_sendsysex(mididev_info *md, u_char *sysex, int len)
|
|
{
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_prefixcmd(mididev_info *md, int status)
|
|
{
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
opl_volumemethod(mididev_info *md, int mode)
|
|
{
|
|
/* NOP. */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The functions below here are the libraries for the above ones.
|
|
*/
|
|
|
|
/*
|
|
* Starts to play the data in the output queue.
|
|
* Call this at >=splmidi.
|
|
*/
|
|
static void
|
|
opl_startplay(sc_p scp)
|
|
{
|
|
mididev_info *devinfo;
|
|
|
|
devinfo = scp->devinfo;
|
|
|
|
/* Can we play now? */
|
|
if (devinfo->midi_dbuf_out.rl == 0)
|
|
return;
|
|
|
|
/* Begin playing. */
|
|
devinfo->callback(devinfo, MIDI_CB_START | MIDI_CB_WR);
|
|
}
|
|
|
|
/* Writes a command to the OPL chip. */
|
|
static void
|
|
opl_command(sc_p scp, int ch, int addr, u_int val)
|
|
{
|
|
int model;
|
|
|
|
DEB(printf("opl%d: sending a command, iobase 0x%x, addr 0x%x, val 0x%x.\n", unit, iobase, addr, val));
|
|
|
|
model = scp->model;
|
|
|
|
/* Write the addr first. */
|
|
bus_space_write_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), ch * 2, (u_char)(addr & 0xff));
|
|
if (model < MODEL_OPL3)
|
|
DELAY(10);
|
|
else {
|
|
bus_space_read_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), ch * 2);
|
|
bus_space_read_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), ch * 2);
|
|
}
|
|
|
|
/* Next write the value. */
|
|
bus_space_write_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), ch * 2 + 1, (u_char)(val & 0xff));
|
|
if (model < MODEL_OPL3)
|
|
DELAY(30);
|
|
else {
|
|
bus_space_read_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), ch * 2);
|
|
bus_space_read_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), ch * 2);
|
|
}
|
|
}
|
|
|
|
/* Reads the status of the OPL chip. */
|
|
static int
|
|
opl_status(sc_p scp)
|
|
{
|
|
DEB(printf("opl%d: reading the status.\n", unit));
|
|
|
|
return bus_space_read_1(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), 0);
|
|
}
|
|
|
|
static void
|
|
opl_enter4opmode(sc_p scp)
|
|
{
|
|
int i;
|
|
mididev_info *devinfo;
|
|
static int v4op[MAX_VOICE] = {
|
|
0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17,
|
|
};
|
|
|
|
devinfo = scp->devinfo;
|
|
|
|
DEB(printf("opl%d: entering 4 OP mode.\n", unit));
|
|
|
|
/* Connect all possible 4 OP voice operators. */
|
|
scp->cmask = 0x3f;
|
|
opl_command(scp, USE_RIGHT, CONNECTION_SELECT_REGISTER, scp->cmask);
|
|
|
|
for (i = 0 ; i < 3 ; i++)
|
|
scp->pv_map[i].voice_mode = VOICE_4OP;
|
|
for (i = 3 ; i < 6 ; i++)
|
|
scp->pv_map[i].voice_mode = VOICE_NONE;
|
|
for (i = 9 ; i < 12 ; i++)
|
|
scp->pv_map[i].voice_mode = VOICE_4OP;
|
|
for (i = 12 ; i < 15 ; i++)
|
|
scp->pv_map[i].voice_mode = VOICE_NONE;
|
|
|
|
for (i = 0 ; i < 12 ; i++)
|
|
scp->lv_map[i] = v4op[i];
|
|
devinfo->synth.alloc.max_voice = 12;
|
|
}
|
|
|
|
static void
|
|
opl_storeinstr(sc_p scp, int instr_no, struct sbi_instrument *instr)
|
|
{
|
|
if (instr->key != FM_PATCH && (instr->key != OPL3_PATCH || scp->model < MODEL_OPL3))
|
|
printf("opl_storeinstr: The patch format field 0x%x is not valid.\n", instr->key);
|
|
|
|
bcopy(instr, &scp->i_map[instr_no], sizeof(*instr));
|
|
}
|
|
|
|
static void
|
|
opl_calcvol(u_char *regbyte, int volume, int main_vol)
|
|
{
|
|
int level;
|
|
|
|
level = (~*regbyte & 0x3f);
|
|
|
|
if (main_vol > 127)
|
|
main_vol = 127;
|
|
|
|
volume = (volume * main_vol) / 127;
|
|
|
|
if (level > 0)
|
|
level += opl_volumetable[volume];
|
|
|
|
RANGE(level, 0, 0x3f);
|
|
|
|
*regbyte = (*regbyte & 0xc0) | (~level & 0x3f);
|
|
}
|
|
|
|
static void
|
|
opl_setvoicevolume(sc_p scp, int voice, int volume, int main_vol)
|
|
{
|
|
u_char vol1, vol2, vol3, vol4;
|
|
int connection;
|
|
struct sbi_instrument *instr;
|
|
struct physical_voice_info *map;
|
|
mididev_info *devinfo;
|
|
|
|
devinfo = scp->devinfo;
|
|
|
|
if (voice < 0 || voice >= devinfo->synth.alloc.max_voice)
|
|
return;
|
|
|
|
map = &scp->pv_map[scp->lv_map[voice]];
|
|
instr = scp->act_i[voice];
|
|
if (instr == NULL)
|
|
instr = &scp->i_map[0];
|
|
|
|
if (instr->channel < 0)
|
|
return;
|
|
if (scp->voc[voice].mode == VOICE_NONE)
|
|
return;
|
|
if (scp->voc[voice].mode == VOICE_2OP) { /* 2 OP mode. */
|
|
vol1 = instr->operators[2];
|
|
vol2 = instr->operators[3];
|
|
if ((instr->operators[10] & 0x01))
|
|
opl_calcvol(&vol1, volume, main_vol);
|
|
opl_calcvol(&vol2, volume, main_vol);
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[0], vol1);
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[1], vol2);
|
|
} else { /* 4 OP mode. */
|
|
vol1 = instr->operators[2];
|
|
vol2 = instr->operators[3];
|
|
vol3 = instr->operators[OFFS_4OP + 2];
|
|
vol4 = instr->operators[OFFS_4OP + 3];
|
|
connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
|
|
switch(connection) {
|
|
case 0:
|
|
opl_calcvol(&vol4, volume, main_vol);
|
|
break;
|
|
case 1:
|
|
opl_calcvol(&vol2, volume, main_vol);
|
|
opl_calcvol(&vol4, volume, main_vol);
|
|
break;
|
|
case 2:
|
|
opl_calcvol(&vol1, volume, main_vol);
|
|
opl_calcvol(&vol4, volume, main_vol);
|
|
break;
|
|
case 3:
|
|
opl_calcvol(&vol1, volume, main_vol);
|
|
opl_calcvol(&vol3, volume, main_vol);
|
|
opl_calcvol(&vol4, volume, main_vol);
|
|
break;
|
|
}
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[0], vol1);
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[1], vol2);
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[2], vol3);
|
|
opl_command(scp, map->ch, KSL_LEVEL + map->op[3], vol4);
|
|
}
|
|
}
|
|
|
|
static void
|
|
opl_freqtofnum(int freq, int *block, int *fnum)
|
|
{
|
|
int f, octave;
|
|
|
|
f = freq;
|
|
octave = 5;
|
|
|
|
if (f == 0)
|
|
octave = 0;
|
|
else if (f < 261) {
|
|
while (f < 261) {
|
|
octave--;
|
|
f <<= 1;
|
|
}
|
|
} else if (f > 493) {
|
|
while (f > 493) {
|
|
octave++;
|
|
f >>= 1;
|
|
}
|
|
}
|
|
if (octave > 7)
|
|
octave = 7;
|
|
|
|
*fnum = freq * (1 << (20 - octave)) / 49716;
|
|
*block = octave;
|
|
}
|
|
|
|
static int notes[] =
|
|
{
|
|
261632,
|
|
277189,
|
|
293671,
|
|
311132,
|
|
329632,
|
|
349232,
|
|
369998,
|
|
391998,
|
|
415306,
|
|
440000,
|
|
466162,
|
|
493880
|
|
};
|
|
|
|
#define BASE_OCTAVE 5
|
|
|
|
static int
|
|
opl_notetofreq(int note_num)
|
|
{
|
|
int note, octave, note_freq;
|
|
|
|
octave = note_num / 12;
|
|
note = note_num % 12;
|
|
|
|
note_freq = notes[note];
|
|
|
|
if (octave < BASE_OCTAVE)
|
|
note_freq >>= (BASE_OCTAVE - octave);
|
|
else if (octave > BASE_OCTAVE)
|
|
note_freq <<= (octave - BASE_OCTAVE);
|
|
|
|
return (note_freq);
|
|
}
|
|
|
|
static u_long
|
|
opl_computefinetune(u_long base_freq, int bend, int range)
|
|
{
|
|
u_long amount;
|
|
int negative, semitones, cents, multiplier;
|
|
|
|
if (bend == 0 || range == 0 || base_freq == 0)
|
|
return (base_freq);
|
|
|
|
multiplier = 1;
|
|
|
|
if (range > 8192)
|
|
range = 8192;
|
|
|
|
bend = bend * range / 8192;
|
|
if (bend == 0)
|
|
return (base_freq);
|
|
|
|
if (bend < 0) {
|
|
negative = 1;
|
|
bend = -bend;
|
|
}
|
|
else
|
|
negative = 0;
|
|
if (bend > range)
|
|
bend = range;
|
|
|
|
while (bend > 2399) {
|
|
multiplier *= 4;
|
|
bend -= 2400;
|
|
}
|
|
|
|
semitones = bend / 100;
|
|
cents = bend % 100;
|
|
|
|
amount = (u_long)(semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
|
|
|
|
if (negative)
|
|
return (base_freq * 10000) / amount;
|
|
else
|
|
return (base_freq * amount) / 10000;
|
|
}
|
|
|
|
/* Allocates resources other than IO ports. */
|
|
static int
|
|
opl_allocres(sc_p scp, device_t dev)
|
|
{
|
|
if (scp->io == NULL) {
|
|
scp->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &scp->io_rid, 0, ~0, 4, RF_ACTIVE);
|
|
if (scp->io == NULL)
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* Releases resources. */
|
|
static void
|
|
opl_releaseres(sc_p scp, device_t dev)
|
|
{
|
|
if (scp->io != NULL) {
|
|
bus_release_resource(dev, SYS_RES_IOPORT, scp->io_rid, scp->io);
|
|
scp->io = NULL;
|
|
}
|
|
}
|
|
|
|
static device_method_t opl_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe , opl_probe ),
|
|
DEVMETHOD(device_attach, opl_attach),
|
|
|
|
{ 0, 0 },
|
|
};
|
|
|
|
static driver_t opl_driver = {
|
|
"midi",
|
|
opl_methods,
|
|
sizeof(struct opl_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(opl, isa, opl_driver, midi_devclass, 0, 0);
|
|
|
|
static device_method_t oplsbc_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe , oplsbc_probe ),
|
|
DEVMETHOD(device_attach, oplsbc_attach),
|
|
|
|
{ 0, 0 },
|
|
};
|
|
|
|
static driver_t oplsbc_driver = {
|
|
"midi",
|
|
oplsbc_methods,
|
|
sizeof(struct opl_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(oplsbc, sbc, oplsbc_driver, midi_devclass, 0, 0);
|