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freebsd-dev/sys/i386/isa/sound/opl3.c
Eivind Eklund 303b270b0a Staticize.
1998-02-09 06:11:36 +00:00

1133 lines
27 KiB
C
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/*
* sound/opl3.c
*
* A low level driver for Yamaha YM3812 and OPL-3 -chips
*
* Copyright by Hannu Savolainen 1993
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. 2.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* Major improvements to the FM handling 30AUG92 by Rob Hooft,
*/
/*
* hooft@chem.ruu.nl
*/
#include <i386/isa/sound/sound_config.h>
#if defined(CONFIG_YM3812)
#include <i386/isa/sound/opl3.h>
#include <machine/clock.h>
#define MAX_VOICE 18
#define OFFS_4OP 11
struct voice_info {
u_char keyon_byte;
long bender;
long bender_range;
u_long orig_freq;
u_long current_freq;
int volume;
int mode;
};
typedef struct opl_devinfo {
int left_io, right_io;
int nr_voice;
int lv_map[MAX_VOICE];
struct voice_info voc[MAX_VOICE];
struct voice_alloc_info *v_alloc;
struct channel_info *chn_info;
struct sbi_instrument i_map[SBFM_MAXINSTR];
struct sbi_instrument *act_i[MAX_VOICE];
struct synth_info fm_info;
int busy;
int model;
u_char cmask;
int is_opl4;
sound_os_info *osp;
}
opl_devinfo;
static struct opl_devinfo *devc = NULL;
static int detected_model;
static int store_instr(int instr_no, struct sbi_instrument * instr);
static void freq_to_fnum(int freq, int *block, int *fnum);
static void opl3_command(int io_addr, u_int addr, u_int val);
static int opl3_kill_note(int dev, int voice, int note, int velocity);
void
enable_opl3_mode(int left, int right, int both)
{
/* NOP */
}
static void
enter_4op_mode(void)
{
int i;
static int v4op[MAX_VOICE] =
{0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17};
devc->cmask = 0x3f; /* Connect all possible 4 OP voice operators */
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, 0x3f);
for (i = 0; i < 3; i++)
pv_map[i].voice_mode = 4;
for (i = 3; i < 6; i++)
pv_map[i].voice_mode = 0;
for (i = 9; i < 12; i++)
pv_map[i].voice_mode = 4;
for (i = 12; i < 15; i++)
pv_map[i].voice_mode = 0;
for (i = 0; i < 12; i++)
devc->lv_map[i] = v4op[i];
devc->v_alloc->max_voice = devc->nr_voice = 12;
}
static int
opl3_ioctl(int dev,
u_int cmd, ioctl_arg arg)
{
switch (cmd) {
case SNDCTL_FM_LOAD_INSTR:
{
struct sbi_instrument ins;
bcopy(&(((char *) arg)[0]), (char *) &ins, sizeof(ins));
if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR) {
printf("FM Error: Invalid instrument number %d\n", ins.channel);
return -(EINVAL);
}
pmgr_inform(dev, PM_E_PATCH_LOADED, ins.channel, 0, 0, 0);
return store_instr(ins.channel, &ins);
}
break;
case SNDCTL_SYNTH_INFO:
devc->fm_info.nr_voices = (devc->nr_voice == 12) ? 6 : devc->nr_voice;
bcopy(&devc->fm_info, &(((char *) arg)[0]), sizeof(devc->fm_info));
return 0;
break;
case SNDCTL_SYNTH_MEMAVL:
return 0x7fffffff;
break;
case SNDCTL_FM_4OP_ENABLE:
if (devc->model == 2)
enter_4op_mode();
return 0;
break;
default:
return -(EINVAL);
}
}
int
opl3_detect(int ioaddr, sound_os_info * osp)
{
/*
* This function returns 1 if the FM chip is present at the given
* I/O port The detection algorithm plays with the timer built in the
* FM chip and looks for a change in the status register.
*
* Note! The timers of the FM chip are not connected to AdLib (and
* compatible) boards.
*
* Note2! The chip is initialized if detected.
*/
u_char stat1, stat2, signature;
int i;
if (devc != NULL)
return 0;
devc = (struct opl_devinfo *) malloc(sizeof(*devc), M_DEVBUF, M_NOWAIT);
if (!devc)
panic("SOUND: Cannot allocate memory\n");
if (devc == NULL) {
printf("OPL3: Can't allocate memory for device control structure\n");
return 0;
}
devc->osp = osp;
/* Reset timers 1 and 2 */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK);
/* Reset the IRQ of the FM chip */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER, IRQ_RESET);
signature = stat1 = inb(ioaddr); /* Status register */
if ((stat1 & 0xE0) != 0x00) {
return 0; /* Should be 0x00 */
}
opl3_command(ioaddr, TIMER1_REGISTER, 0xff); /* Set timer1 to 0xff */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER,
TIMER2_MASK | TIMER1_START); /* Unmask and start timer 1 */
DELAY(150); /* Now we have to delay at least 80 usec */
stat2 = inb(ioaddr); /* Read status after timers have expired */
/*
* Stop the timers
*/
/* Reset timers 1 and 2 */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK);
/* Reset the IRQ of the FM chip */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER, IRQ_RESET);
if ((stat2 & 0xE0) != 0xc0) {
return 0; /* There is no YM3812 */
}
/*
* There is a FM chicp in this address. Detect the type (OPL2 to
* OPL4)
*/
if (signature == 0x06) {/* OPL2 */
detected_model = 2;
} else if (signature == 0x00) { /* OPL3 or OPL4 */
u_char tmp;
detected_model = 3;
/*
* Detect availability of OPL4 (_experimental_). Works
* propably only after a cold boot. In addition the OPL4 port
* of the chip may not be connected to the PC bus at all.
*/
opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, 0x00);
opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, OPL3_ENABLE | OPL4_ENABLE);
if ((tmp = inb(ioaddr)) == 0x02) { /* Have a OPL4 */
detected_model = 4;
}
if (!0) { /* OPL4 port is free */ /* XXX check here lr970711 */
int tmp;
outb(ioaddr - 8, 0x02); /* Select OPL4 ID register */
DELAY(10);
tmp = inb(ioaddr - 7); /* Read it */
DELAY(10);
if (tmp == 0x20) { /* OPL4 should return 0x20 here */
detected_model = 4;
outb(ioaddr - 8, 0xF8); /* Select OPL4 FM mixer control */
DELAY(10);
outb(ioaddr - 7, 0x1B); /* Write value */
DELAY(10);
} else
detected_model = 3;
}
opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, 0);
}
for (i = 0; i < 9; i++)
opl3_command(ioaddr, KEYON_BLOCK + i, 0); /* Note off */
opl3_command(ioaddr, TEST_REGISTER, ENABLE_WAVE_SELECT);
opl3_command(ioaddr, PERCUSSION_REGISTER, 0x00); /* Melodic mode. */
return 1;
}
static int
opl3_kill_note(int dev, int voice, int note, int velocity)
{
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return 0;
devc->v_alloc->map[voice] = 0;
map = &pv_map[devc->lv_map[voice]];
DEB(printf("Kill note %d\n", voice));
if (map->voice_mode == 0)
return 0;
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num,
devc->voc[voice].keyon_byte & ~0x20);
devc->voc[voice].keyon_byte = 0;
devc->voc[voice].bender = 0;
devc->voc[voice].volume = 64;
devc->voc[voice].bender_range = 200; /* 200 cents = 2 semitones */
devc->voc[voice].orig_freq = 0;
devc->voc[voice].current_freq = 0;
devc->voc[voice].mode = 0;
return 0;
}
#define HIHAT 0
#define CYMBAL 1
#define TOMTOM 2
#define SNARE 3
#define BDRUM 4
#define UNDEFINED TOMTOM
#define DEFAULT TOMTOM
static int
store_instr(int instr_no, struct sbi_instrument * instr)
{
if (instr->key !=FM_PATCH && (instr->key !=OPL3_PATCH || devc->model != 2))
printf("FM warning: Invalid patch format field (key) 0x%x\n",
instr->key);
bcopy((char *) instr, (char *) &(devc->i_map[instr_no]), sizeof(*instr));
return 0;
}
static int
opl3_set_instr(int dev, int voice, int instr_no)
{
if (voice < 0 || voice >= devc->nr_voice)
return 0;
if (instr_no < 0 || instr_no >= SBFM_MAXINSTR)
return 0;
devc->act_i[voice] = &devc->i_map[instr_no];
return 0;
}
/*
* The next table looks magical, but it certainly is not. Its values have
* been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
* for i=0. This log-table converts a linear volume-scaling (0..127) to a
* logarithmic scaling as present in the FM-synthesizer chips. so : Volume
* 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
* volume -8 it was implemented as a table because it is only 128 bytes and
* it saves a lot of log() calculations. (RH)
*/
static char fm_volume_table[128] =
{
-64, -48, -40, -35, -32, -29, -27, -26,
-24, -23, -21, -20, -19, -18, -18, -17,
-16, -15, -15, -14, -13, -13, -12, -12,
-11, -11, -10, -10, -10, -9, -9, -8,
-8, -8, -7, -7, -7, -6, -6, -6,
-5, -5, -5, -5, -4, -4, -4, -4,
-3, -3, -3, -3, -2, -2, -2, -2,
-2, -1, -1, -1, -1, 0, 0, 0,
0, 0, 0, 1, 1, 1, 1, 1,
1, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 4,
4, 4, 4, 4, 4, 4, 4, 5,
5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6,
6, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 8, 8, 8, 8, 8};
static void
calc_vol(u_char *regbyte, int volume, int main_vol)
{
int level = (~*regbyte & 0x3f);
if (main_vol > 127)
main_vol = 127;
volume = (volume * main_vol) / 127;
if (level)
level += fm_volume_table[volume];
RANGE (level, 0, 0x3f );
*regbyte = (*regbyte & 0xc0) | (~level & 0x3f);
}
static void
set_voice_volume(int voice, int volume, int main_vol)
{
u_char vol1, vol2, vol3, vol4;
struct sbi_instrument *instr;
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return;
map = &pv_map[devc->lv_map[voice]];
instr = devc->act_i[voice];
if (!instr)
instr = &devc->i_map[0];
if (instr->channel < 0)
return;
if (devc->voc[voice].mode == 0)
return;
if (devc->voc[voice].mode == 2) {
vol1 = instr->operators[2];
vol2 = instr->operators[3];
if ((instr->operators[10] & 0x01)) {
calc_vol(&vol1, volume, main_vol);
}
calc_vol(&vol2, volume, main_vol);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], vol1);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], vol2);
} else { /* 4 OP voice */
int connection;
vol1 = instr->operators[2];
vol2 = instr->operators[3];
vol3 = instr->operators[OFFS_4OP + 2];
vol4 = instr->operators[OFFS_4OP + 3];
/*
* The connection method for 4 OP devc->voc is defined by the
* rightmost bits at the offsets 10 and 10+OFFS_4OP
*/
connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
switch (connection) {
case 0:
calc_vol(&vol4, volume, main_vol);
break;
case 1:
calc_vol(&vol2, volume, main_vol);
calc_vol(&vol4, volume, main_vol);
break;
case 2:
calc_vol(&vol1, volume, main_vol);
calc_vol(&vol4, volume, main_vol);
break;
case 3:
calc_vol(&vol1, volume, main_vol);
calc_vol(&vol3, volume, main_vol);
calc_vol(&vol4, volume, main_vol);
break;
default:;
}
opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], vol1);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], vol2);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[2], vol3);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[3], vol4);
}
}
static int
opl3_start_note(int dev, int voice, int note, int volume)
{
u_char data, fpc;
int block, fnum, freq, voice_mode;
struct sbi_instrument *instr;
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return 0;
map = &pv_map[devc->lv_map[voice]];
if (map->voice_mode == 0)
return 0;
if (note == 255) { /* Just change the volume */
set_voice_volume(voice, volume, devc->voc[voice].volume);
return 0;
}
/*
* Kill previous note before playing
*/
opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], 0xff); /* Carrier volume to min */
opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], 0xff); /* Modulator volume to */
if (map->voice_mode == 4) {
opl3_command(map->ioaddr, KSL_LEVEL + map->op[2], 0xff);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[3], 0xff);
}
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, 0x00); /* Note off */
instr = devc->act_i[voice];
if (!instr)
instr = &devc->i_map[0];
if (instr->channel < 0) {
printf( "OPL3: Initializing voice %d with undefined instrument\n",
voice);
return 0;
}
if (map->voice_mode == 2 && instr->key == OPL3_PATCH)
return 0; /* Cannot play */
voice_mode = map->voice_mode;
if (voice_mode == 4) {
int voice_shift;
voice_shift = (map->ioaddr == devc->left_io) ? 0 : 3;
voice_shift += map->voice_num;
if (instr->key != OPL3_PATCH) { /* Just 2 OP patch */
voice_mode = 2;
devc->cmask &= ~(1 << voice_shift);
} else
devc->cmask |= (1 << voice_shift);
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, devc->cmask);
}
/*
* Set Sound Characteristics
*/
opl3_command(map->ioaddr, AM_VIB + map->op[0], instr->operators[0]);
opl3_command(map->ioaddr, AM_VIB + map->op[1], instr->operators[1]);
/*
* Set Attack/Decay
*/
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[0], instr->operators[4]);
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[1], instr->operators[5]);
/*
* Set Sustain/Release
*/
opl3_command(map->ioaddr,SUSTAIN_RELEASE + map->op[0], instr->operators[6]);
opl3_command(map->ioaddr,SUSTAIN_RELEASE + map->op[1], instr->operators[7]);
/*
* Set Wave Select
*/
opl3_command(map->ioaddr, WAVE_SELECT + map->op[0], instr->operators[8]);
opl3_command(map->ioaddr, WAVE_SELECT + map->op[1], instr->operators[9]);
/*
* Set Feedback/Connection
*/
fpc = instr->operators[10];
if (!(fpc & 0x30))
fpc |= 0x30; /* Ensure that at least one chn is enabled */
opl3_command(map->ioaddr, FEEDBACK_CONNECTION + map->voice_num, fpc);
/*
* If the voice is a 4 OP one, initialize the operators 3 and 4 also
*/
if (voice_mode == 4) {
/*
* Set Sound Characteristics
*/
opl3_command(map->ioaddr, AM_VIB + map->op[2],
instr->operators[OFFS_4OP + 0]);
opl3_command(map->ioaddr, AM_VIB + map->op[3],
instr->operators[OFFS_4OP + 1]);
/*
* Set Attack/Decay
*/
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[2],
instr->operators[OFFS_4OP + 4]);
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[3],
instr->operators[OFFS_4OP + 5]);
/*
* Set Sustain/Release
*/
opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[2],
instr->operators[OFFS_4OP + 6]);
opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[3],
instr->operators[OFFS_4OP + 7]);
/*
* Set Wave Select
*/
opl3_command(map->ioaddr, WAVE_SELECT + map->op[2],
instr->operators[OFFS_4OP + 8]);
opl3_command(map->ioaddr, WAVE_SELECT + map->op[3],
instr->operators[OFFS_4OP + 9]);
/*
* Set Feedback/Connection
*/
fpc = instr->operators[OFFS_4OP + 10];
if (!(fpc & 0x30))
fpc |= 0x30; /* Ensure that at least one chn is enabled */
opl3_command(map->ioaddr,FEEDBACK_CONNECTION + map->voice_num + 3, fpc);
}
devc->voc[voice].mode = voice_mode;
set_voice_volume(voice, volume, devc->voc[voice].volume);
freq = devc->voc[voice].orig_freq = note_to_freq(note) / 1000;
/*
* Since the pitch bender may have been set before playing the note,
* we have to calculate the bending now.
*/
freq = compute_finetune(devc->voc[voice].orig_freq,
devc->voc[voice].bender, devc->voc[voice].bender_range);
devc->voc[voice].current_freq = freq;
freq_to_fnum(freq, &block, &fnum);
/*
* Play note
*/
data = fnum & 0xff; /* Least significant bits of fnumber */
opl3_command(map->ioaddr, FNUM_LOW + map->voice_num, data);
data = 0x20 | ((block & 0x7) << 2) | ((fnum >> 8) & 0x3);
devc->voc[voice].keyon_byte = data;
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, data);
if (voice_mode == 4)
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num + 3, data);
return 0;
}
static void
freq_to_fnum(int freq, int *block, int *fnum)
{
int f, octave;
/*
* Converts the note frequency to block and fnum values for the FM
* chip
*/
/*
* First try to compute the block -value (octave) where the note
* belongs
*/
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 void
opl3_command(int io_addr, u_int addr, u_int val)
{
int i;
/*
* The original 2-OP synth requires a quite long delay after writing
* to a register. The OPL-3 survives with just two INBs
*/
outb(io_addr, (u_char) (addr & 0xff));
if (!devc->model != 2)
DELAY(10);
else
for (i = 0; i < 2; i++)
inb(io_addr);
outb(io_addr + 1, (u_char) (val & 0xff));
if (devc->model != 2)
DELAY(30);
else
for (i = 0; i < 2; i++)
inb(io_addr);
}
static void
opl3_reset(int dev)
{
int i;
for (i = 0; i < 18; i++)
devc->lv_map[i] = i;
for (i = 0; i < devc->nr_voice; i++) {
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[0], 0xff);
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[1], 0xff);
if (pv_map[devc->lv_map[i]].voice_mode == 4) {
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[2], 0xff);
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[3], 0xff);
}
opl3_kill_note(dev, i, 0, 64);
}
if (devc->model == 2) {
devc->v_alloc->max_voice = devc->nr_voice = 18;
for (i = 0; i < 18; i++)
pv_map[i].voice_mode = 2;
}
}
static int
opl3_open(int dev, int mode)
{
int i;
if (devc->busy)
return -(EBUSY);
devc->busy = 1;
devc->v_alloc->max_voice = devc->nr_voice = (devc->model == 2) ? 18 : 9;
devc->v_alloc->timestamp = 0;
for (i = 0; i < 18; i++) {
devc->v_alloc->map[i] = 0;
devc->v_alloc->alloc_times[i] = 0;
}
devc->cmask = 0x00; /* Just 2 OP mode */
if (devc->model == 2)
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, devc->cmask);
return 0;
}
static void
opl3_close(int dev)
{
devc->busy = 0;
devc->v_alloc->max_voice = devc->nr_voice = (devc->model == 2) ? 18 : 9;
devc->fm_info.nr_drums = 0;
devc->fm_info.perc_mode = 0;
opl3_reset(dev);
}
static void
opl3_hw_control(int dev, u_char *event)
{
}
static int
opl3_load_patch(int dev, int format, snd_rw_buf * addr,
int offs, int count, int pmgr_flag)
{
struct sbi_instrument ins;
if (count < sizeof(ins)) {
printf("FM Error: Patch record too short\n");
return -(EINVAL);
}
if (uiomove(&((char *) &ins)[offs], sizeof(ins) - offs, addr)) {
printf("sb: Bad copyin()!\n");
};
if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR) {
printf("FM Error: Invalid instrument number %d\n", ins.channel);
return -(EINVAL);
}
ins.key = format;
return store_instr(ins.channel, &ins);
}
static void
opl3_panning(int dev, int voice, int pressure)
{
}
static void
opl3_volume_method(int dev, int mode)
{
}
#define SET_VIBRATO(cell) { \
tmp = instr->operators[(cell-1)+(((cell-1)/2)*OFFS_4OP)]; \
if (pressure > 110) \
tmp |= 0x40; /* Vibrato on */ \
opl3_command (map->ioaddr, AM_VIB + map->op[cell-1], tmp);}
static void
opl3_aftertouch(int dev, int voice, int pressure)
{
int tmp;
struct sbi_instrument *instr;
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return;
map = &pv_map[devc->lv_map[voice]];
DEB(printf("Aftertouch %d\n", voice));
if (map->voice_mode == 0)
return;
/*
* Adjust the amount of vibrato depending the pressure
*/
instr = devc->act_i[voice];
if (!instr)
instr = &devc->i_map[0];
if (devc->voc[voice].mode == 4) {
int 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;
}
/*
* Not implemented yet
*/
} else {
SET_VIBRATO(1);
if ((instr->operators[10] & 0x01)) /* Additive synthesis */
SET_VIBRATO(2);
}
}
#undef SET_VIBRATO
static void
bend_pitch(int dev, int voice, int value)
{
u_char data;
int block, fnum, freq;
struct physical_voice_info *map;
map = &pv_map[devc->lv_map[voice]];
if (map->voice_mode == 0)
return;
devc->voc[voice].bender = value;
if (!value)
return;
if (!(devc->voc[voice].keyon_byte & 0x20))
return; /* Not keyed on */
freq = compute_finetune(devc->voc[voice].orig_freq, devc->voc[voice].bender, devc->voc[voice].bender_range);
devc->voc[voice].current_freq = freq;
freq_to_fnum(freq, &block, &fnum);
data = fnum & 0xff; /* Least significant bits of fnumber */
opl3_command(map->ioaddr, FNUM_LOW + map->voice_num, data);
data = 0x20 | ((block & 0x7) << 2) | ((fnum >> 8) & 0x3);
/* KEYON|OCTAVE|MS bits of f-num */
devc->voc[voice].keyon_byte = data;
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, data);
}
static void
opl3_controller(int dev, int voice, int ctrl_num, int value)
{
if (voice < 0 || voice >= devc->nr_voice)
return;
switch (ctrl_num) {
case CTRL_PITCH_BENDER:
bend_pitch(dev, voice, value);
break;
case CTRL_PITCH_BENDER_RANGE:
devc->voc[voice].bender_range = value;
break;
case CTL_MAIN_VOLUME:
devc->voc[voice].volume = value / 128;
break;
}
}
static int
opl3_patchmgr(int dev, struct patmgr_info * rec)
{
return -(EINVAL);
}
static void
opl3_bender(int dev, int voice, int value)
{
if (voice < 0 || voice >= devc->nr_voice)
return;
bend_pitch(dev, voice, value - 8192);
}
static int
opl3_alloc_voice(int dev, int chn, int note, struct voice_alloc_info * alloc)
{
int i, p, best, first, avail, best_time = 0x7fffffff;
struct sbi_instrument *instr;
int is4op;
int instr_no;
if (chn < 0 || chn > 15)
instr_no = 0;
else
instr_no = devc->chn_info[chn].pgm_num;
instr = &devc->i_map[instr_no];
if (instr->channel < 0 || /* Instrument not loaded */
devc->nr_voice != 12) /* Not in 4 OP mode */
is4op = 0;
else if (devc->nr_voice == 12) /* 4 OP mode */
is4op = (instr->key == OPL3_PATCH);
else
is4op = 0;
if (is4op) {
first = p = 0;
avail = 6;
} else {
if (devc->nr_voice == 12) /* 4 OP mode. Use the '2 OP
* only' operators first */
first = p = 6;
else
first = p = 0;
avail = devc->nr_voice;
}
/*
* Now try to find 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) { /* Find oldest playing note */
best_time = alloc->alloc_times[p];
best = p;
}
p = (p + 1) % avail;
}
/*
* Insert some kind of priority mechanism here.
*/
if (best < 0)
best = 0;
if (best > devc->nr_voice)
best -= devc->nr_voice;
return best; /* All devc->voc in use. Select the first
* one. */
}
static void
opl3_setup_voice(int dev, int voice, int chn)
{
struct channel_info *info =
&synth_devs[dev]->chn_info[chn];
opl3_set_instr(dev, voice, info->pgm_num);
devc->voc[voice].bender = info->bender_value;
devc->voc[voice].volume = info->controllers[CTL_MAIN_VOLUME];
}
static struct synth_operations opl3_operations =
{
NULL,
0,
SYNTH_TYPE_FM,
FM_TYPE_ADLIB,
opl3_open,
opl3_close,
opl3_ioctl,
opl3_kill_note,
opl3_start_note,
opl3_set_instr,
opl3_reset,
opl3_hw_control,
opl3_load_patch,
opl3_aftertouch,
opl3_controller,
opl3_panning,
opl3_volume_method,
opl3_patchmgr,
opl3_bender,
opl3_alloc_voice,
opl3_setup_voice
};
void
opl3_init(int ioaddr, sound_os_info * osp)
{
int i;
if (num_synths >= MAX_SYNTH_DEV) {
printf("OPL3 Error: Too many synthesizers\n");
return ;
}
if (devc == NULL) {
printf("OPL3: Device control structure not initialized.\n");
return ;
}
bzero((char *) devc, sizeof(*devc));
devc->osp = osp;
devc->nr_voice = 9;
strcpy(devc->fm_info.name, "OPL2-");
devc->fm_info.device = 0;
devc->fm_info.synth_type = SYNTH_TYPE_FM;
devc->fm_info.synth_subtype = FM_TYPE_ADLIB;
devc->fm_info.perc_mode = 0;
devc->fm_info.nr_voices = 9;
devc->fm_info.nr_drums = 0;
devc->fm_info.instr_bank_size = SBFM_MAXINSTR;
devc->fm_info.capabilities = 0;
devc->left_io = ioaddr;
devc->right_io = ioaddr + 2;
if (detected_model <= 2)
devc->model = 1;
else {
devc->model = 2;
if (detected_model == 4)
devc->is_opl4 = 1;
}
opl3_operations.info = &devc->fm_info;
synth_devs[num_synths++] = &opl3_operations;
devc->v_alloc = &opl3_operations.alloc;
devc->chn_info = &opl3_operations.chn_info[0];
if (devc->model == 2) {
if (devc->is_opl4)
conf_printf2("Yamaha OPL4/OPL3 FM", ioaddr, 0, -1, -1);
else
conf_printf2("Yamaha OPL3 FM", ioaddr, 0, -1, -1);
devc->v_alloc->max_voice = devc->nr_voice = 18;
devc->fm_info.nr_drums = 0;
devc->fm_info.capabilities |= SYNTH_CAP_OPL3;
strcpy(devc->fm_info.name, "Yamaha OPL-3");
for (i = 0; i < 18; i++)
if (pv_map[i].ioaddr == USE_LEFT)
pv_map[i].ioaddr = devc->left_io;
else
pv_map[i].ioaddr = devc->right_io;
opl3_command(devc->right_io, OPL3_MODE_REGISTER, OPL3_ENABLE);
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, 0x00);
} else {
conf_printf2("Yamaha OPL2 FM", ioaddr, 0, -1, -1);
devc->v_alloc->max_voice = devc->nr_voice = 9;
devc->fm_info.nr_drums = 0;
for (i = 0; i < 18; i++)
pv_map[i].ioaddr = devc->left_io;
};
for (i = 0; i < SBFM_MAXINSTR; i++)
devc->i_map[i].channel = -1;
return ;
}
#endif
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