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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 "sound_config.h"
-
- #if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_YM3812)
-
- #include "opl3.h"
-
- #define MAX_VOICE 18
- #define OFFS_4OP 11 /*
- * * * Definitions for the operators OP3 and
- * * OP4 * * begin here */
-
- static int opl3_enabled = 0;
- static int left_address = 0x388, right_address = 0x388, both_address = 0;
-
- static int nr_voices = 9;
- static int logical_voices[MAX_VOICE] =
- {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17};
-
- struct voice_info
- {
- unsigned char keyon_byte;
- long bender;
- long bender_range;
- unsigned long orig_freq;
- unsigned long current_freq;
- int mode;
- };
-
- static struct voice_info voices[MAX_VOICE];
- static struct voice_alloc_info *voice_alloc;
- static struct channel_info *chn_info;
-
- static struct sbi_instrument *instrmap;
- static struct sbi_instrument *active_instrument[MAX_VOICE] =
- {NULL};
-
- static struct synth_info fm_info =
- {"OPL-2", 0, SYNTH_TYPE_FM, FM_TYPE_ADLIB, 0, 9, 0, SBFM_MAXINSTR, 0};
-
- static int already_initialized = 0;
-
- static int opl3_ok = 0;
- static int opl3_busy = 0;
- static int fm_model = 0; /*
-
-
- * * * * 0=no fm, 1=mono, 2=SB Pro 1, 3=SB
- * Pro 2 * * */
-
- 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, unsigned int addr, unsigned int val);
- static int opl3_kill_note (int dev, int voice, int note, int velocity);
- static unsigned char connection_mask = 0x00;
-
- void
- enable_opl3_mode (int left, int right, int both)
- {
- if (opl3_enabled)
- return;
-
- opl3_enabled = 1;
- left_address = left;
- right_address = right;
- both_address = both;
- fm_info.capabilities = SYNTH_CAP_OPL3;
- fm_info.synth_subtype = FM_TYPE_OPL3;
- }
-
- static void
- enter_4op_mode (void)
- {
- int i;
- static int voices_4op[MAX_VOICE] =
- {0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17};
-
- connection_mask = 0x3f; /* Connect all possible 4 OP voices */
- opl3_command (right_address, CONNECTION_SELECT_REGISTER, 0x3f);
-
- for (i = 0; i < 3; i++)
- physical_voices[i].voice_mode = 4;
- for (i = 3; i < 6; i++)
- physical_voices[i].voice_mode = 0;
-
- for (i = 9; i < 12; i++)
- physical_voices[i].voice_mode = 4;
- for (i = 12; i < 15; i++)
- physical_voices[i].voice_mode = 0;
-
- for (i = 0; i < 12; i++)
- logical_voices[i] = voices_4op[i];
- voice_alloc->max_voice = nr_voices = 12;
- }
-
- static int
- opl3_ioctl (int dev,
- unsigned int cmd, unsigned int arg)
- {
- switch (cmd)
- {
-
- case SNDCTL_FM_LOAD_INSTR:
- {
- struct sbi_instrument ins;
-
- IOCTL_FROM_USER ((char *) &ins, (char *) arg, 0, sizeof (ins));
-
- if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR)
- {
- printk ("FM Error: Invalid instrument number %d\n", ins.channel);
- return RET_ERROR (EINVAL);
- }
-
- pmgr_inform (dev, PM_E_PATCH_LOADED, ins.channel, 0, 0, 0);
- return store_instr (ins.channel, &ins);
- }
- break;
-
- case SNDCTL_SYNTH_INFO:
- fm_info.nr_voices = (nr_voices == 12) ? 6 : nr_voices;
-
- IOCTL_TO_USER ((char *) arg, 0, &fm_info, sizeof (fm_info));
- return 0;
- break;
-
- case SNDCTL_SYNTH_MEMAVL:
- return 0x7fffffff;
- break;
-
- case SNDCTL_FM_4OP_ENABLE:
- if (opl3_enabled)
- enter_4op_mode ();
- return 0;
- break;
-
- default:
- return RET_ERROR (EINVAL);
- }
-
- }
-
- int
- opl3_detect (int ioaddr)
- {
- /*
- * This function returns 1 if the FM chicp 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.
- */
-
- unsigned char stat1, stat2;
- int i;
-
- if (already_initialized)
- {
- return 0; /*
- * Do avoid duplicate initializations
- */
- }
-
- if (opl3_enabled)
- ioaddr = left_address;
-
- opl3_command (ioaddr, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK); /*
- * Reset
- * timers
- * 1
- * and
- * 2
- */
- opl3_command (ioaddr, TIMER_CONTROL_REGISTER, IRQ_RESET); /*
- * Reset the
- * IRQ of FM
- * * chicp
- */
-
- stat1 = INB (ioaddr); /*
- * Read status register
- */
-
- if ((stat1 & 0xE0) != 0x00)
- {
- return 0; /*
- * Should be 0x00
- */
- }
-
- opl3_command (ioaddr, TIMER1_REGISTER, 0xff); /*
- * Set timer 1 to
- * 0xff
- */
- opl3_command (ioaddr, TIMER_CONTROL_REGISTER,
- TIMER2_MASK | TIMER1_START); /*
- * Unmask and start timer 1
- */
-
- /*
- * Now we have to delay at least 80 msec
- */
-
- for (i = 0; i < 50; i++)
- tenmicrosec (); /*
- * To be sure
- */
-
- stat2 = INB (ioaddr); /*
- * Read status after timers have expired
- */
-
- /*
- * Stop the timers
- */
-
- opl3_command (ioaddr, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK); /*
- * Reset
- * timers
- * 1
- * and
- * 2
- */
- opl3_command (ioaddr, TIMER_CONTROL_REGISTER, IRQ_RESET); /*
- * Reset the
- * IRQ of FM
- * * chicp
- */
-
- if ((stat2 & 0xE0) != 0xc0)
- {
- return 0; /*
- * There is no YM3812
- */
- }
-
- /*
- * There is a FM chicp in this address. Now set some default values.
- */
-
- 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 >= nr_voices)
- return 0;
-
- voice_alloc->map[voice] = 0;
-
- map = &physical_voices[logical_voices[voice]];
-
- DEB (printk ("Kill note %d\n", voice));
-
- if (map->voice_mode == 0)
- return 0;
-
- opl3_command (map->ioaddr, KEYON_BLOCK + map->voice_num, voices[voice].keyon_byte & ~0x20);
-
- voices[voice].keyon_byte = 0;
- voices[voice].bender = 0;
- voices[voice].bender_range = 200; /*
- * 200 cents = 2 semitones
- */
- voices[voice].orig_freq = 0;
- voices[voice].current_freq = 0;
- voices[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 || !opl3_enabled))
- printk ("FM warning: Invalid patch format field (key) 0x%x\n", instr->key);
- memcpy ((char *) &(instrmap[instr_no]), (char *) instr, sizeof (*instr));
-
- return 0;
- }
-
- static int
- opl3_set_instr (int dev, int voice, int instr_no)
- {
- if (voice < 0 || voice >= nr_voices)
- return 0;
-
- if (instr_no < 0 || instr_no >= SBFM_MAXINSTR)
- return 0;
-
- active_instrument[voice] = &instrmap[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)
- */
- char fm_volume_table[128] =
- {-64, -48, -40, -35, -32, -29, -27, -26, /*
- * 0 - 7
- */
- -24, -23, -21, -20, -19, -18, -18, -17, /*
- * 8 - 15
- */
- -16, -15, -15, -14, -13, -13, -12, -12, /*
- * 16 - 23
- */
- -11, -11, -10, -10, -10, -9, -9, -8, /*
- * 24 - 31
- */
- -8, -8, -7, -7, -7, -6, -6, -6,/*
- * 32 - 39
- */
- -5, -5, -5, -5, -4, -4, -4, -4,/*
- * 40 - 47
- */
- -3, -3, -3, -3, -2, -2, -2, -2,/*
- * 48 - 55
- */
- -2, -1, -1, -1, -1, 0, 0, 0, /*
- * 56 - 63
- */
- 0, 0, 0, 1, 1, 1, 1, 1, /*
- * 64 - 71
- */
- 1, 2, 2, 2, 2, 2, 2, 2, /*
- * 72 - 79
- */
- 3, 3, 3, 3, 3, 3, 3, 4, /*
- * 80 - 87
- */
- 4, 4, 4, 4, 4, 4, 4, 5, /*
- * 88 - 95
- */
- 5, 5, 5, 5, 5, 5, 5, 5, /*
- * 96 - 103
- */
- 6, 6, 6, 6, 6, 6, 6, 6, /*
- * 104 - 111
- */
- 6, 7, 7, 7, 7, 7, 7, 7, /*
- * 112 - 119
- */
- 7, 7, 7, 8, 8, 8, 8, 8}; /*
-
-
- * * * * 120 - 127 */
-
- static void
- calc_vol (unsigned char *regbyte, int volume)
- {
- int level = (~*regbyte & 0x3f);
-
- if (level)
- level += fm_volume_table[volume];
-
- if (level > 0x3f)
- level = 0x3f;
- if (level < 0)
- level = 0;
-
- *regbyte = (*regbyte & 0xc0) | (~level & 0x3f);
- }
-
- static void
- set_voice_volume (int voice, int volume)
- {
- unsigned char vol1, vol2, vol3, vol4;
- struct sbi_instrument *instr;
- struct physical_voice_info *map;
-
- if (voice < 0 || voice >= nr_voices)
- return;
-
- map = &physical_voices[logical_voices[voice]];
-
- instr = active_instrument[voice];
-
- if (!instr)
- instr = &instrmap[0];
-
- if (instr->channel < 0)
- return;
-
- if (voices[voice].mode == 0)
- return;
-
- if (voices[voice].mode == 2)
- { /*
- * 2 OP voice
- */
-
- vol1 = instr->operators[2];
- vol2 = instr->operators[3];
-
- if ((instr->operators[10] & 0x01))
- { /*
- * Additive synthesis
- */
- calc_vol (&vol1, volume);
- calc_vol (&vol2, volume);
- }
- else
- { /*
- * FM synthesis
- */
- calc_vol (&vol2, volume);
- }
-
- opl3_command (map->ioaddr, KSL_LEVEL + map->op[0], vol1); /*
- * Modulator
- * volume
- */
- opl3_command (map->ioaddr, KSL_LEVEL + map->op[1], vol2); /*
- * Carrier
- * volume
- */
- }
- 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 voices 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); /*
- * Just the OP 4 is carrier
- */
- break;
-
- case 1:
- calc_vol (&vol2, volume);
- calc_vol (&vol4, volume);
- break;
-
- case 2:
- calc_vol (&vol1, volume);
- calc_vol (&vol4, volume);
- break;
-
- case 3:
- calc_vol (&vol1, volume);
- calc_vol (&vol3, volume);
- calc_vol (&vol4, volume);
- break;
-
- default: /*
- * Why ??
- */ ;
- }
-
- 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)
- {
- unsigned char data, fpc;
- int block, fnum, freq, voice_mode;
- struct sbi_instrument *instr;
- struct physical_voice_info *map;
-
- if (voice < 0 || voice >= nr_voices)
- return 0;
-
- map = &physical_voices[logical_voices[voice]];
-
- if (map->voice_mode == 0)
- return 0;
-
- if (note == 255) /*
- * Just change the volume
- */
- {
- set_voice_volume (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 = active_instrument[voice];
-
- if (!instr)
- instr = &instrmap[0];
-
- if (instr->channel < 0)
- {
- printk (
- "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 == left_address) ? 0 : 3;
- voice_shift += map->voice_num;
-
- if (instr->key != OPL3_PATCH) /*
- * Just 2 OP patch
- */
- {
- voice_mode = 2;
- connection_mask &= ~(1 << voice_shift);
- }
- else
- {
- connection_mask |= (1 << voice_shift);
- }
-
- opl3_command (right_address, CONNECTION_SELECT_REGISTER, connection_mask);
- }
-
- /*
- * 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);
- }
-
- voices[voice].mode = voice_mode;
-
- set_voice_volume (voice, volume);
-
- freq = voices[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 (voices[voice].orig_freq, voices[voice].bender, voices[voice].bender_range);
- voices[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);
- voices[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, unsigned int addr, unsigned 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 ((unsigned char) (addr & 0xff), io_addr); /*
- * Select register
- *
- */
-
- if (!opl3_enabled)
- tenmicrosec ();
- else
- for (i = 0; i < 2; i++)
- INB (io_addr);
-
- OUTB ((unsigned char) (val & 0xff), io_addr + 1); /*
- * Write to register
- *
- */
-
- if (!opl3_enabled)
- {
- tenmicrosec ();
- tenmicrosec ();
- tenmicrosec ();
- }
- else
- for (i = 0; i < 2; i++)
- INB (io_addr);
- }
-
- static void
- opl3_reset (int dev)
- {
- int i;
-
- for (i = 0; i < nr_voices; i++)
- {
- opl3_command (physical_voices[logical_voices[i]].ioaddr,
- KSL_LEVEL + physical_voices[logical_voices[i]].op[0], 0xff);
-
- opl3_command (physical_voices[logical_voices[i]].ioaddr,
- KSL_LEVEL + physical_voices[logical_voices[i]].op[1], 0xff);
-
- if (physical_voices[logical_voices[i]].voice_mode == 4)
- {
- opl3_command (physical_voices[logical_voices[i]].ioaddr,
- KSL_LEVEL + physical_voices[logical_voices[i]].op[2], 0xff);
-
- opl3_command (physical_voices[logical_voices[i]].ioaddr,
- KSL_LEVEL + physical_voices[logical_voices[i]].op[3], 0xff);
- }
-
- opl3_kill_note (dev, i, 0, 64);
- }
-
- if (opl3_enabled)
- {
- voice_alloc->max_voice = nr_voices = 18;
-
- for (i = 0; i < 18; i++)
- logical_voices[i] = i;
-
- for (i = 0; i < 18; i++)
- physical_voices[i].voice_mode = 2;
-
- }
-
- }
-
- static int
- opl3_open (int dev, int mode)
- {
- if (!opl3_ok)
- return RET_ERROR (ENXIO);
- if (opl3_busy)
- return RET_ERROR (EBUSY);
- opl3_busy = 1;
-
- connection_mask = 0x00; /*
- * Just 2 OP voices
- */
- if (opl3_enabled)
- opl3_command (right_address, CONNECTION_SELECT_REGISTER, connection_mask);
- return 0;
- }
-
- static void
- opl3_close (int dev)
- {
- opl3_busy = 0;
- voice_alloc->max_voice = nr_voices = opl3_enabled ? 18 : 9;
- fm_info.nr_drums = 0;
- fm_info.perc_mode = 0;
-
- opl3_reset (dev);
- }
-
- static void
- opl3_hw_control (int dev, unsigned 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))
- {
- printk ("FM Error: Patch record too short\n");
- return RET_ERROR (EINVAL);
- }
-
- COPY_FROM_USER (&((char *) &ins)[offs], (char *) addr, offs, sizeof (ins) - offs);
-
- if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR)
- {
- printk ("FM Error: Invalid instrument number %d\n", ins.channel);
- return RET_ERROR (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 >= nr_voices)
- return;
-
- map = &physical_voices[logical_voices[voice]];
-
- DEB (printk ("Aftertouch %d\n", voice));
-
- if (map->voice_mode == 0)
- return;
-
- /*
- * Adjust the amount of vibrato depending the pressure
- */
-
- instr = active_instrument[voice];
-
- if (!instr)
- instr = &instrmap[0];
-
- if (voices[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)
- {
- unsigned char data;
- int block, fnum, freq;
- struct physical_voice_info *map;
-
- map = &physical_voices[logical_voices[voice]];
-
- if (map->voice_mode == 0)
- return;
-
- voices[voice].bender = value;
- if (!value)
- return;
- if (!(voices[voice].keyon_byte & 0x20))
- return; /*
- * Not keyed on
- */
-
- freq = compute_finetune (voices[voice].orig_freq, voices[voice].bender, voices[voice].bender_range);
- voices[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
- *
- */
- voices[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 >= nr_voices)
- return;
-
- switch (ctrl_num)
- {
- case CTRL_PITCH_BENDER:
- bend_pitch (dev, voice, value);
- break;
-
- case CTRL_PITCH_BENDER_RANGE:
- voices[voice].bender_range = value;
- break;
- }
- }
-
- static int
- opl3_patchmgr (int dev, struct patmgr_info *rec)
- {
- return RET_ERROR (EINVAL);
- }
-
- static void
- opl3_bender (int dev, int voice, int value)
- {
- if (voice < 0 || voice >= nr_voices)
- return;
-
- bend_pitch (dev, voice, value);
- }
-
- static int
- opl3_alloc_voice (int dev, int chn, int note, struct voice_alloc_info *alloc)
- {
- int i, p, avail_voices;
- struct sbi_instrument *instr;
- int is4op;
- int instr_no;
-
- if (chn < 0 || chn > 15)
- instr_no = 0;
- else
- instr_no = chn_info[chn].pgm_num;
-
- instr = &instrmap[instr_no];
- if (instr->channel < 0 || /* Instrument not loaded */
- nr_voices != 12) /* Not in 4 OP mode */
- is4op = 0;
- else if (nr_voices == 12) /* 4 OP mode */
- is4op = (instr->key == OPL3_PATCH);
- else
- is4op = 0;
-
- if (is4op)
- {
- p = 0;
- avail_voices = 6;
- }
- else
- {
- if (nr_voices == 12) /* 4 OP mode. Use the '2 OP only' voices first */
- p = 6;
- else
- p = 0;
- avail_voices = nr_voices;
- }
-
- /*
- * Now try to find a free voice
- */
-
- for (i = 0; i < avail_voices; i++)
- {
- if (alloc->map[p] == 0)
- {
- return p;
- }
- p = (p + 1) % nr_voices;
- }
-
- /*
- * Insert some kind of priority mechanism here.
- */
-
- printk ("OPL3: Out of free voices\n");
- return 0; /* All voices in use. Select the first one. */
- }
-
- static struct synth_operations opl3_operations =
- {
- &fm_info,
- 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
- };
-
- long
- opl3_init (long mem_start)
- {
- int i;
-
- PERMANENT_MALLOC (struct sbi_instrument *, instrmap,
- SBFM_MAXINSTR * sizeof (*instrmap), mem_start);
-
- if (num_synths >= MAX_SYNTH_DEV)
- printk ("OPL3 Error: Too many synthesizers\n");
- else
- {
- synth_devs[num_synths++] = &opl3_operations;
- voice_alloc = &opl3_operations.alloc;
- chn_info = &opl3_operations.chn_info[0];
- }
-
- fm_model = 0;
- opl3_ok = 1;
- if (opl3_enabled)
- {
- printk (" <Yamaha OPL-3 FM>");
- fm_model = 2;
- voice_alloc->max_voice = nr_voices = 18;
- fm_info.nr_drums = 0;
- fm_info.capabilities |= SYNTH_CAP_OPL3;
- #ifndef SCO
- strcpy (fm_info.name, "Yamaha OPL-3");
- #endif
-
- for (i = 0; i < 18; i++)
- if (physical_voices[i].ioaddr == USE_LEFT)
- physical_voices[i].ioaddr = left_address;
- else
- physical_voices[i].ioaddr = right_address;
-
-
- opl3_command (right_address, OPL3_MODE_REGISTER, OPL3_ENABLE); /*
- * Enable
- * OPL-3
- * mode
- */
- opl3_command (right_address, CONNECTION_SELECT_REGISTER, 0x00); /*
- * Select
- * all
- * 2-OP
- * *
- * voices
- */
- }
- else
- {
- printk (" <Yamaha 2-OP FM>");
- fm_model = 1;
- voice_alloc->max_voice = nr_voices = 9;
- fm_info.nr_drums = 0;
-
- for (i = 0; i < 18; i++)
- physical_voices[i].ioaddr = left_address;
- };
-
- already_initialized = 1;
- for (i = 0; i < SBFM_MAXINSTR; i++)
- instrmap[i].channel = -1;
-
- return mem_start;
- }
-
- #endif
-