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Diffstat (limited to 'sound/drivers/opl3/opl3_drums.c')
-rw-r--r--sound/drivers/opl3/opl3_drums.c224
1 files changed, 224 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_drums.c b/sound/drivers/opl3/opl3_drums.c
new file mode 100644
index 000000000..149298229
--- /dev/null
+++ b/sound/drivers/opl3/opl3_drums.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
+ *
+ * OPL2/OPL3/OPL4 FM routines for internal percussion channels
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "opl3_voice.h"
+
+static char snd_opl3_drum_table[47] =
+{
+ OPL3_BASSDRUM_ON, OPL3_BASSDRUM_ON, OPL3_HIHAT_ON, /* 35 - 37 */
+ OPL3_SNAREDRUM_ON, OPL3_HIHAT_ON, OPL3_SNAREDRUM_ON, /* 38 - 40 */
+ OPL3_BASSDRUM_ON, OPL3_HIHAT_ON, OPL3_BASSDRUM_ON, /* 41 - 43 */
+ OPL3_HIHAT_ON, OPL3_TOMTOM_ON, OPL3_HIHAT_ON, /* 44 - 46 */
+ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_CYMBAL_ON, /* 47 - 49 */
+
+ OPL3_TOMTOM_ON, OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, /* 50 - 52 */
+ OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, /* 53 - 55 */
+ OPL3_HIHAT_ON, OPL3_CYMBAL_ON, OPL3_TOMTOM_ON, /* 56 - 58 */
+ OPL3_CYMBAL_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 59 - 61 */
+ OPL3_HIHAT_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 62 - 64 */
+
+ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 65 - 67 */
+ OPL3_TOMTOM_ON, OPL3_HIHAT_ON, OPL3_HIHAT_ON, /* 68 - 70 */
+ OPL3_HIHAT_ON, OPL3_HIHAT_ON, OPL3_TOMTOM_ON, /* 71 - 73 */
+ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 74 - 76 */
+ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 77 - 79 */
+ OPL3_CYMBAL_ON, OPL3_CYMBAL_ON /* 80 - 81 */
+};
+
+struct snd_opl3_drum_voice {
+ int voice;
+ int op;
+ unsigned char am_vib;
+ unsigned char ksl_level;
+ unsigned char attack_decay;
+ unsigned char sustain_release;
+ unsigned char feedback_connection;
+ unsigned char wave_select;
+};
+
+struct snd_opl3_drum_note {
+ int voice;
+ unsigned char fnum;
+ unsigned char octave_f;
+ unsigned char feedback_connection;
+};
+
+static struct snd_opl3_drum_voice bass_op0 = {6, 0, 0x00, 0x32, 0xf8, 0x66, 0x30, 0x00};
+static struct snd_opl3_drum_voice bass_op1 = {6, 1, 0x00, 0x03, 0xf6, 0x57, 0x30, 0x00};
+static struct snd_opl3_drum_note bass_note = {6, 0x90, 0x09};
+
+static struct snd_opl3_drum_voice hihat = {7, 0, 0x00, 0x03, 0xf0, 0x06, 0x20, 0x00};
+
+static struct snd_opl3_drum_voice snare = {7, 1, 0x00, 0x03, 0xf0, 0x07, 0x20, 0x02};
+static struct snd_opl3_drum_note snare_note = {7, 0xf4, 0x0d};
+
+static struct snd_opl3_drum_voice tomtom = {8, 0, 0x02, 0x03, 0xf0, 0x06, 0x10, 0x00};
+static struct snd_opl3_drum_note tomtom_note = {8, 0xf4, 0x09};
+
+static struct snd_opl3_drum_voice cymbal = {8, 1, 0x04, 0x03, 0xf0, 0x06, 0x10, 0x00};
+
+/*
+ * set drum voice characteristics
+ */
+static void snd_opl3_drum_voice_set(struct snd_opl3 *opl3,
+ struct snd_opl3_drum_voice *data)
+{
+ unsigned char op_offset = snd_opl3_regmap[data->voice][data->op];
+ unsigned char voice_offset = data->voice;
+ unsigned short opl3_reg;
+
+ /* Set OPL3 AM_VIB register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_AM_VIB + op_offset);
+ opl3->command(opl3, opl3_reg, data->am_vib);
+
+ /* Set OPL3 KSL_LEVEL register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset);
+ opl3->command(opl3, opl3_reg, data->ksl_level);
+
+ /* Set OPL3 ATTACK_DECAY register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_ATTACK_DECAY + op_offset);
+ opl3->command(opl3, opl3_reg, data->attack_decay);
+
+ /* Set OPL3 SUSTAIN_RELEASE register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
+ opl3->command(opl3, opl3_reg, data->sustain_release);
+
+ /* Set OPL3 FEEDBACK_CONNECTION register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
+ opl3->command(opl3, opl3_reg, data->feedback_connection);
+
+ /* Select waveform */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_WAVE_SELECT + op_offset);
+ opl3->command(opl3, opl3_reg, data->wave_select);
+}
+
+/*
+ * Set drum voice pitch
+ */
+static void snd_opl3_drum_note_set(struct snd_opl3 *opl3,
+ struct snd_opl3_drum_note *data)
+{
+ unsigned char voice_offset = data->voice;
+ unsigned short opl3_reg;
+
+ /* Set OPL3 FNUM_LOW register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_FNUM_LOW + voice_offset);
+ opl3->command(opl3, opl3_reg, data->fnum);
+
+ /* Set OPL3 KEYON_BLOCK register */
+ opl3_reg = OPL3_LEFT | (OPL3_REG_KEYON_BLOCK + voice_offset);
+ opl3->command(opl3, opl3_reg, data->octave_f);
+}
+
+/*
+ * Set drum voice volume and position
+ */
+static void snd_opl3_drum_vol_set(struct snd_opl3 *opl3,
+ struct snd_opl3_drum_voice *data,
+ int vel, struct snd_midi_channel *chan)
+{
+ unsigned char op_offset = snd_opl3_regmap[data->voice][data->op];
+ unsigned char voice_offset = data->voice;
+ unsigned char reg_val;
+ unsigned short opl3_reg;
+
+ /* Set OPL3 KSL_LEVEL register */
+ reg_val = data->ksl_level;
+ snd_opl3_calc_volume(&reg_val, vel, chan);
+ opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset);
+ opl3->command(opl3, opl3_reg, reg_val);
+
+ /* Set OPL3 FEEDBACK_CONNECTION register */
+ /* Set output voice connection */
+ reg_val = data->feedback_connection | OPL3_STEREO_BITS;
+ if (chan->gm_pan < 43)
+ reg_val &= ~OPL3_VOICE_TO_RIGHT;
+ if (chan->gm_pan > 85)
+ reg_val &= ~OPL3_VOICE_TO_LEFT;
+ opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
+ opl3->command(opl3, opl3_reg, reg_val);
+}
+
+/*
+ * Loads drum voices at init time
+ */
+void snd_opl3_load_drums(struct snd_opl3 *opl3)
+{
+ snd_opl3_drum_voice_set(opl3, &bass_op0);
+ snd_opl3_drum_voice_set(opl3, &bass_op1);
+ snd_opl3_drum_note_set(opl3, &bass_note);
+
+ snd_opl3_drum_voice_set(opl3, &hihat);
+
+ snd_opl3_drum_voice_set(opl3, &snare);
+ snd_opl3_drum_note_set(opl3, &snare_note);
+
+ snd_opl3_drum_voice_set(opl3, &tomtom);
+ snd_opl3_drum_note_set(opl3, &tomtom_note);
+
+ snd_opl3_drum_voice_set(opl3, &cymbal);
+}
+
+/*
+ * Switch drum voice on or off
+ */
+void snd_opl3_drum_switch(struct snd_opl3 *opl3, int note, int vel, int on_off,
+ struct snd_midi_channel *chan)
+{
+ unsigned char drum_mask;
+ struct snd_opl3_drum_voice *drum_voice;
+
+ if (!(opl3->drum_reg & OPL3_PERCUSSION_ENABLE))
+ return;
+
+ if ((note < 35) || (note > 81))
+ return;
+ drum_mask = snd_opl3_drum_table[note - 35];
+
+ if (on_off) {
+ switch (drum_mask) {
+ case OPL3_BASSDRUM_ON:
+ drum_voice = &bass_op1;
+ break;
+ case OPL3_HIHAT_ON:
+ drum_voice = &hihat;
+ break;
+ case OPL3_SNAREDRUM_ON:
+ drum_voice = &snare;
+ break;
+ case OPL3_TOMTOM_ON:
+ drum_voice = &tomtom;
+ break;
+ case OPL3_CYMBAL_ON:
+ drum_voice = &cymbal;
+ break;
+ default:
+ drum_voice = &tomtom;
+ }
+
+ snd_opl3_drum_vol_set(opl3, drum_voice, vel, chan);
+ opl3->drum_reg |= drum_mask;
+ } else {
+ opl3->drum_reg &= ~drum_mask;
+ }
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
+ opl3->drum_reg);
+}
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