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[linux-2.6.git] / 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 }