sound/drivers/opl3/opl3_drums.c

   1 /*
   2  *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
   3  *
   4  *   OPL2/OPL3/OPL4 FM routines for internal percussion channels
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include "opl3_voice.h"
  23
  24 extern char snd_opl3_regmap[MAX_OPL2_VOICES][4];
  25
  26 static char snd_opl3_drum_table[47] =
  27 {
  28         OPL3_BASSDRUM_ON,  OPL3_BASSDRUM_ON,  OPL3_HIHAT_ON,    /* 35 - 37 */
  29         OPL3_SNAREDRUM_ON, OPL3_HIHAT_ON,     OPL3_SNAREDRUM_ON, /* 38 - 40 */
  30         OPL3_BASSDRUM_ON,  OPL3_HIHAT_ON,     OPL3_BASSDRUM_ON, /* 41 - 43 */
  31         OPL3_HIHAT_ON,     OPL3_TOMTOM_ON,    OPL3_HIHAT_ON,    /* 44 - 46 */
  32         OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,    OPL3_CYMBAL_ON,   /* 47 - 49 */
  33
  34         OPL3_TOMTOM_ON,    OPL3_CYMBAL_ON,    OPL3_CYMBAL_ON,   /* 50 - 52 */
  35         OPL3_CYMBAL_ON,    OPL3_CYMBAL_ON,    OPL3_CYMBAL_ON,   /* 53 - 55 */
  36         OPL3_HIHAT_ON,     OPL3_CYMBAL_ON,    OPL3_TOMTOM_ON,   /* 56 - 58 */
  37         OPL3_CYMBAL_ON,    OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,   /* 59 - 61 */
  38         OPL3_HIHAT_ON,     OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,   /* 62 - 64 */
  39
  40         OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,   /* 65 - 67 */
  41         OPL3_TOMTOM_ON,    OPL3_HIHAT_ON,     OPL3_HIHAT_ON,    /* 68 - 70 */
  42         OPL3_HIHAT_ON,     OPL3_HIHAT_ON,     OPL3_TOMTOM_ON,   /* 71 - 73 */
  43         OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,   /* 74 - 76 */
  44         OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,    OPL3_TOMTOM_ON,   /* 77 - 79 */
  45         OPL3_CYMBAL_ON,    OPL3_CYMBAL_ON                       /* 80 - 81 */
  46 };
  47
  48 struct snd_opl3_drum_voice {
  49         int voice;
  50         int op;
  51         unsigned char am_vib;
  52         unsigned char ksl_level;
  53         unsigned char attack_decay;
  54         unsigned char sustain_release;
  55         unsigned char feedback_connection;
  56         unsigned char wave_select;
  57 };
  58
  59 struct snd_opl3_drum_note {
  60         int voice;
  61         unsigned char fnum;
  62         unsigned char octave_f;
  63         unsigned char feedback_connection;
  64 };
  65
  66 static struct snd_opl3_drum_voice bass_op0 = {6, 0, 0x00, 0x32, 0xf8, 0x66, 0x30, 0x00};
  67 static struct snd_opl3_drum_voice bass_op1 = {6, 1, 0x00, 0x03, 0xf6, 0x57, 0x30, 0x00};
  68 static struct snd_opl3_drum_note bass_note = {6, 0x90, 0x09};
  69
  70 static struct snd_opl3_drum_voice hihat = {7, 0, 0x00, 0x03, 0xf0, 0x06, 0x20, 0x00};
  71
  72 static struct snd_opl3_drum_voice snare = {7, 1, 0x00, 0x03, 0xf0, 0x07, 0x20, 0x02};
  73 static struct snd_opl3_drum_note snare_note = {7, 0xf4, 0x0d};
  74
  75 static struct snd_opl3_drum_voice tomtom = {8, 0, 0x02, 0x03, 0xf0, 0x06, 0x10, 0x00};
  76 static struct snd_opl3_drum_note tomtom_note = {8, 0xf4, 0x09};
  77
  78 static struct snd_opl3_drum_voice cymbal = {8, 1, 0x04, 0x03, 0xf0, 0x06, 0x10, 0x00};
  79
  80 /*
  81  * set drum voice characteristics
  82  */
  83 static void snd_opl3_drum_voice_set(struct snd_opl3 *opl3,
  84                                     struct snd_opl3_drum_voice *data)
  85 {
  86         unsigned char op_offset = snd_opl3_regmap[data->voice][data->op];
  87         unsigned char voice_offset = data->voice;
  88         unsigned short opl3_reg;
  89
  90         /* Set OPL3 AM_VIB register */
  91         opl3_reg = OPL3_LEFT | (OPL3_REG_AM_VIB + op_offset);
  92         opl3->command(opl3, opl3_reg, data->am_vib);
  93
  94         /* Set OPL3 KSL_LEVEL register */
  95         opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset);
  96         opl3->command(opl3, opl3_reg, data->ksl_level);
  97
  98         /* Set OPL3 ATTACK_DECAY register */
  99         opl3_reg = OPL3_LEFT | (OPL3_REG_ATTACK_DECAY + op_offset);
 100         opl3->command(opl3, opl3_reg, data->attack_decay);
 101
 102         /* Set OPL3 SUSTAIN_RELEASE register */
 103         opl3_reg = OPL3_LEFT | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
 104         opl3->command(opl3, opl3_reg, data->sustain_release);
 105
 106         /* Set OPL3 FEEDBACK_CONNECTION register */
 107         opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
 108         opl3->command(opl3, opl3_reg, data->feedback_connection);
 109
 110         /* Select waveform */
 111         opl3_reg = OPL3_LEFT | (OPL3_REG_WAVE_SELECT + op_offset);
 112         opl3->command(opl3, opl3_reg, data->wave_select);
 113 }
 114
 115 /*
 116  * Set drum voice pitch
 117  */
 118 static void snd_opl3_drum_note_set(struct snd_opl3 *opl3,
 119                                    struct snd_opl3_drum_note *data)
 120 {
 121         unsigned char voice_offset = data->voice;
 122         unsigned short opl3_reg;
 123
 124         /* Set OPL3 FNUM_LOW register */
 125         opl3_reg = OPL3_LEFT | (OPL3_REG_FNUM_LOW + voice_offset);
 126         opl3->command(opl3, opl3_reg, data->fnum);
 127
 128         /* Set OPL3 KEYON_BLOCK register */
 129         opl3_reg = OPL3_LEFT | (OPL3_REG_KEYON_BLOCK + voice_offset);
 130         opl3->command(opl3, opl3_reg, data->octave_f);
 131 }
 132
 133 /*
 134  * Set drum voice volume and position
 135  */
 136 static void snd_opl3_drum_vol_set(struct snd_opl3 *opl3,
 137                                   struct snd_opl3_drum_voice *data,
 138                                   int vel, struct snd_midi_channel *chan)
 139 {
 140         unsigned char op_offset = snd_opl3_regmap[data->voice][data->op];
 141         unsigned char voice_offset = data->voice;
 142         unsigned char reg_val;
 143         unsigned short opl3_reg;
 144
 145         /* Set OPL3 KSL_LEVEL register */
 146         reg_val = data->ksl_level;
 147         snd_opl3_calc_volume(&reg_val, vel, chan);
 148         opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset);
 149         opl3->command(opl3, opl3_reg, reg_val);
 150
 151         /* Set OPL3 FEEDBACK_CONNECTION register */
 152         /* Set output voice connection */
 153         reg_val = data->feedback_connection | OPL3_STEREO_BITS;
 154         if (chan->gm_pan < 43)
 155                 reg_val &= ~OPL3_VOICE_TO_RIGHT;
 156         if (chan->gm_pan > 85)
 157                 reg_val &= ~OPL3_VOICE_TO_LEFT;
 158         opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
 159         opl3->command(opl3, opl3_reg, reg_val);
 160 }
 161
 162 /*
 163  * Loads drum voices at init time
 164  */
 165 void snd_opl3_load_drums(struct snd_opl3 *opl3)
 166 {
 167         snd_opl3_drum_voice_set(opl3, &bass_op0);
 168         snd_opl3_drum_voice_set(opl3, &bass_op1);
 169         snd_opl3_drum_note_set(opl3, &bass_note);
 170
 171         snd_opl3_drum_voice_set(opl3, &hihat);
 172
 173         snd_opl3_drum_voice_set(opl3, &snare);
 174         snd_opl3_drum_note_set(opl3, &snare_note);
 175
 176         snd_opl3_drum_voice_set(opl3, &tomtom);
 177         snd_opl3_drum_note_set(opl3, &tomtom_note);
 178
 179         snd_opl3_drum_voice_set(opl3, &cymbal);
 180 }
 181
 182 /*
 183  * Switch drum voice on or off
 184  */
 185 void snd_opl3_drum_switch(struct snd_opl3 *opl3, int note, int vel, int on_off,
 186                           struct snd_midi_channel *chan)
 187 {
 188         unsigned char drum_mask;
 189         struct snd_opl3_drum_voice *drum_voice;
 190
 191         if (!(opl3->drum_reg & OPL3_PERCUSSION_ENABLE))
 192                 return;
 193
 194         if ((note < 35) || (note > 81))
 195                 return;
 196         drum_mask = snd_opl3_drum_table[note - 35];
 197
 198         if (on_off) {
 199                 switch (drum_mask) {
 200                 case OPL3_BASSDRUM_ON:
 201                         drum_voice = &bass_op1;
 202                         break;
 203                 case OPL3_HIHAT_ON:
 204                         drum_voice = &hihat;
 205                         break;
 206                 case OPL3_SNAREDRUM_ON:
 207                         drum_voice = &snare;
 208                         break;
 209                 case OPL3_TOMTOM_ON:
 210                         drum_voice = &tomtom;
 211                         break;
 212                 case OPL3_CYMBAL_ON:
 213                         drum_voice = &cymbal;
 214                         break;
 215                 default:
 216                         drum_voice = &tomtom;
 217                 }
 218
 219                 snd_opl3_drum_vol_set(opl3, drum_voice, vel, chan);
 220                 opl3->drum_reg |= drum_mask;
 221         } else {
 222                 opl3->drum_reg &= ~drum_mask;
 223         }
 224         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
 225                          opl3->drum_reg);
 226 }