/* * Copyright (c) by Uros Bizjak * * Routines for OPL2/OPL3/OPL4 control * * 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 #include /* * There is 18 possible 2 OP voices * (9 in the left and 9 in the right). * The first OP is the modulator and 2nd is the carrier. * * The first three voices in the both sides may be connected * with another voice to a 4 OP voice. For example voice 0 * can be connected with voice 3. The operators of voice 3 are * used as operators 3 and 4 of the new 4 OP voice. * In this case the 2 OP voice number 0 is the 'first half' and * voice 3 is the second. */ /* * Register offset table for OPL2/3 voices, * OPL2 / one OPL3 register array side only */ char snd_opl3_regmap[MAX_OPL2_VOICES][4] = { /* OP1 OP2 OP3 OP4 */ /* ------------------------ */ { 0x00, 0x03, 0x08, 0x0b }, { 0x01, 0x04, 0x09, 0x0c }, { 0x02, 0x05, 0x0a, 0x0d }, { 0x08, 0x0b, 0x00, 0x00 }, { 0x09, 0x0c, 0x00, 0x00 }, { 0x0a, 0x0d, 0x00, 0x00 }, { 0x10, 0x13, 0x00, 0x00 }, /* used by percussive voices */ { 0x11, 0x14, 0x00, 0x00 }, /* if the percussive mode */ { 0x12, 0x15, 0x00, 0x00 } /* is selected (only left reg block) */ }; /* * prototypes */ static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note); static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice); static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params); static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode); static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection); /* ------------------------------ */ /* * open the device exclusively */ int snd_opl3_open(struct snd_hwdep * hw, struct file *file) { struct snd_opl3 *opl3 = hw->private_data; mutex_lock(&opl3->access_mutex); if (opl3->used) { mutex_unlock(&opl3->access_mutex); return -EAGAIN; } opl3->used++; mutex_unlock(&opl3->access_mutex); return 0; } /* * ioctl for hwdep device: */ int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file, unsigned int cmd, unsigned long arg) { struct snd_opl3 *opl3 = hw->private_data; void __user *argp = (void __user *)arg; snd_assert(opl3 != NULL, return -EINVAL); switch (cmd) { /* get information */ case SNDRV_DM_FM_IOCTL_INFO: { struct snd_dm_fm_info info; info.fm_mode = opl3->fm_mode; info.rhythm = opl3->rhythm; if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info))) return -EFAULT; return 0; } case SNDRV_DM_FM_IOCTL_RESET: #ifdef CONFIG_SND_OSSEMUL case SNDRV_DM_FM_OSS_IOCTL_RESET: #endif snd_opl3_reset(opl3); return 0; case SNDRV_DM_FM_IOCTL_PLAY_NOTE: #ifdef CONFIG_SND_OSSEMUL case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE: #endif { struct snd_dm_fm_note note; if (copy_from_user(¬e, argp, sizeof(struct snd_dm_fm_note))) return -EFAULT; return snd_opl3_play_note(opl3, ¬e); } case SNDRV_DM_FM_IOCTL_SET_VOICE: #ifdef CONFIG_SND_OSSEMUL case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE: #endif { struct snd_dm_fm_voice voice; if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice))) return -EFAULT; return snd_opl3_set_voice(opl3, &voice); } case SNDRV_DM_FM_IOCTL_SET_PARAMS: #ifdef CONFIG_SND_OSSEMUL case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS: #endif { struct snd_dm_fm_params params; if (copy_from_user(¶ms, argp, sizeof(struct snd_dm_fm_params))) return -EFAULT; return snd_opl3_set_params(opl3, ¶ms); } case SNDRV_DM_FM_IOCTL_SET_MODE: #ifdef CONFIG_SND_OSSEMUL case SNDRV_DM_FM_OSS_IOCTL_SET_MODE: #endif return snd_opl3_set_mode(opl3, (int) arg); case SNDRV_DM_FM_IOCTL_SET_CONNECTION: #ifdef CONFIG_SND_OSSEMUL case SNDRV_DM_FM_OSS_IOCTL_SET_OPL: #endif return snd_opl3_set_connection(opl3, (int) arg); #ifdef CONFIG_SND_DEBUG default: snd_printk("unknown IOCTL: 0x%x\n", cmd); #endif } return -ENOTTY; } /* * close the device */ int snd_opl3_release(struct snd_hwdep * hw, struct file *file) { struct snd_opl3 *opl3 = hw->private_data; snd_opl3_reset(opl3); mutex_lock(&opl3->access_mutex); opl3->used--; mutex_unlock(&opl3->access_mutex); return 0; } /* ------------------------------ */ void snd_opl3_reset(struct snd_opl3 * opl3) { unsigned short opl3_reg; unsigned short reg_side; unsigned char voice_offset; int max_voices, i; max_voices = (opl3->hardware < OPL3_HW_OPL3) ? MAX_OPL2_VOICES : MAX_OPL3_VOICES; for (i = 0; i < max_voices; i++) { /* Get register array side and offset of voice */ if (i < MAX_OPL2_VOICES) { /* Left register block for voices 0 .. 8 */ reg_side = OPL3_LEFT; voice_offset = i; } else { /* Right register block for voices 9 .. 17 */ reg_side = OPL3_RIGHT; voice_offset = i - MAX_OPL2_VOICES; } opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]); opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */ opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]); opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */ opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); opl3->command(opl3, opl3_reg, 0x00); /* Note off */ } opl3->max_voices = MAX_OPL2_VOICES; opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2; opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT); opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */ opl3->rhythm = 0; } static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note) { unsigned short reg_side; unsigned char voice_offset; unsigned short opl3_reg; unsigned char reg_val; /* Voices 0 - 8 in OPL2 mode */ /* Voices 0 - 17 in OPL3 mode */ if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ? MAX_OPL3_VOICES : MAX_OPL2_VOICES)) return -EINVAL; /* Get register array side and offset of voice */ if (note->voice < MAX_OPL2_VOICES) { /* Left register block for voices 0 .. 8 */ reg_side = OPL3_LEFT; voice_offset = note->voice; } else { /* Right register block for voices 9 .. 17 */ reg_side = OPL3_RIGHT; voice_offset = note->voice - MAX_OPL2_VOICES; } /* Set lower 8 bits of note frequency */ reg_val = (unsigned char) note->fnum; opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); opl3->command(opl3, opl3_reg, reg_val); reg_val = 0x00; /* Set output sound flag */ if (note->key_on) reg_val |= OPL3_KEYON_BIT; /* Set octave */ reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK; /* Set higher 2 bits of note frequency */ reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK; /* Set OPL3 KEYON_BLOCK register of requested voice */ opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); opl3->command(opl3, opl3_reg, reg_val); return 0; } static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice) { unsigned short reg_side; unsigned char op_offset; unsigned char voice_offset; unsigned short opl3_reg; unsigned char reg_val; /* Only operators 1 and 2 */ if (voice->op > 1) return -EINVAL; /* Voices 0 - 8 in OPL2 mode */ /* Voices 0 - 17 in OPL3 mode */ if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ? MAX_OPL3_VOICES : MAX_OPL2_VOICES)) return -EINVAL; /* Get register array side and offset of voice */ if (voice->voice < MAX_OPL2_VOICES) { /* Left register block for voices 0 .. 8 */ reg_side = OPL3_LEFT; voice_offset = voice->voice; } else { /* Right register block for voices 9 .. 17 */ reg_side = OPL3_RIGHT; voice_offset = voice->voice - MAX_OPL2_VOICES; } /* Get register offset of operator */ op_offset = snd_opl3_regmap[voice_offset][voice->op]; reg_val = 0x00; /* Set amplitude modulation (tremolo) effect */ if (voice->am) reg_val |= OPL3_TREMOLO_ON; /* Set vibrato effect */ if (voice->vibrato) reg_val |= OPL3_VIBRATO_ON; /* Set sustaining sound phase */ if (voice->do_sustain) reg_val |= OPL3_SUSTAIN_ON; /* Set keyboard scaling bit */ if (voice->kbd_scale) reg_val |= OPL3_KSR; /* Set harmonic or frequency multiplier */ reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK; /* Set OPL3 AM_VIB register of requested voice/operator */ opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); opl3->command(opl3, opl3_reg, reg_val); /* Set decreasing volume of higher notes */ reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK; /* Set output volume */ reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK; /* Set OPL3 KSL_LEVEL register of requested voice/operator */ opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); opl3->command(opl3, opl3_reg, reg_val); /* Set attack phase level */ reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK; /* Set decay phase level */ reg_val |= voice->decay & OPL3_DECAY_MASK; /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); opl3->command(opl3, opl3_reg, reg_val); /* Set sustain phase level */ reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK; /* Set release phase level */ reg_val |= voice->release & OPL3_RELEASE_MASK; /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); opl3->command(opl3, opl3_reg, reg_val); /* Set inter-operator feedback */ reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK; /* Set inter-operator connection */ if (voice->connection) reg_val |= OPL3_CONNECTION_BIT; /* OPL-3 only */ if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) { if (voice->left) reg_val |= OPL3_VOICE_TO_LEFT; if (voice->right) reg_val |= OPL3_VOICE_TO_RIGHT; } /* Feedback/connection bits are applicable to voice */ opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); opl3->command(opl3, opl3_reg, reg_val); /* Select waveform */ reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK; opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); opl3->command(opl3, opl3_reg, reg_val); return 0; } static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params) { unsigned char reg_val; reg_val = 0x00; /* Set keyboard split method */ if (params->kbd_split) reg_val |= OPL3_KEYBOARD_SPLIT; opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val); reg_val = 0x00; /* Set amplitude modulation (tremolo) depth */ if (params->am_depth) reg_val |= OPL3_TREMOLO_DEPTH; /* Set vibrato depth */ if (params->vib_depth) reg_val |= OPL3_VIBRATO_DEPTH; /* Set percussion mode */ if (params->rhythm) { reg_val |= OPL3_PERCUSSION_ENABLE; opl3->rhythm = 1; } else { opl3->rhythm = 0; } /* Play percussion instruments */ if (params->bass) reg_val |= OPL3_BASSDRUM_ON; if (params->snare) reg_val |= OPL3_SNAREDRUM_ON; if (params->tomtom) reg_val |= OPL3_TOMTOM_ON; if (params->cymbal) reg_val |= OPL3_CYMBAL_ON; if (params->hihat) reg_val |= OPL3_HIHAT_ON; opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val); return 0; } static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode) { if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3)) return -EINVAL; opl3->fm_mode = mode; if (opl3->hardware >= OPL3_HW_OPL3) opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */ return 0; } static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection) { unsigned char reg_val; /* OPL-3 only */ if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3) return -EINVAL; reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 | OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2); /* Set 4-op connections */ opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val); return 0; }