448 lines
12 KiB
C
448 lines
12 KiB
C
![]() |
/*
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* Copyright (c) by Uros Bizjak <uros@kss-loka.si>
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*
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* Routines for OPL2/OPL3/OPL4 control
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/opl3.h>
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#include <sound/asound_fm.h>
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/*
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* There is 18 possible 2 OP voices
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* (9 in the left and 9 in the right).
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* The first OP is the modulator and 2nd is the carrier.
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*
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* The first three voices in the both sides may be connected
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* with another voice to a 4 OP voice. For example voice 0
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* can be connected with voice 3. The operators of voice 3 are
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* used as operators 3 and 4 of the new 4 OP voice.
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* In this case the 2 OP voice number 0 is the 'first half' and
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* voice 3 is the second.
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*/
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/*
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* Register offset table for OPL2/3 voices,
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* OPL2 / one OPL3 register array side only
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*/
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char snd_opl3_regmap[MAX_OPL2_VOICES][4] =
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{
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/* OP1 OP2 OP3 OP4 */
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/* ------------------------ */
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{ 0x00, 0x03, 0x08, 0x0b },
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{ 0x01, 0x04, 0x09, 0x0c },
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{ 0x02, 0x05, 0x0a, 0x0d },
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{ 0x08, 0x0b, 0x00, 0x00 },
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{ 0x09, 0x0c, 0x00, 0x00 },
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{ 0x0a, 0x0d, 0x00, 0x00 },
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{ 0x10, 0x13, 0x00, 0x00 }, /* used by percussive voices */
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{ 0x11, 0x14, 0x00, 0x00 }, /* if the percussive mode */
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{ 0x12, 0x15, 0x00, 0x00 } /* is selected (only left reg block) */
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};
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/*
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* prototypes
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*/
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static int snd_opl3_play_note(opl3_t * opl3, snd_dm_fm_note_t * note);
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static int snd_opl3_set_voice(opl3_t * opl3, snd_dm_fm_voice_t * voice);
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static int snd_opl3_set_params(opl3_t * opl3, snd_dm_fm_params_t * params);
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static int snd_opl3_set_mode(opl3_t * opl3, int mode);
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static int snd_opl3_set_connection(opl3_t * opl3, int connection);
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/* ------------------------------ */
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/*
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* open the device exclusively
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*/
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int snd_opl3_open(snd_hwdep_t * hw, struct file *file)
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{
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opl3_t *opl3 = hw->private_data;
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down(&opl3->access_mutex);
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if (opl3->used) {
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up(&opl3->access_mutex);
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return -EAGAIN;
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}
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opl3->used++;
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up(&opl3->access_mutex);
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return 0;
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}
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/*
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* ioctl for hwdep device:
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*/
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int snd_opl3_ioctl(snd_hwdep_t * hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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opl3_t *opl3 = hw->private_data;
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void __user *argp = (void __user *)arg;
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snd_assert(opl3 != NULL, return -EINVAL);
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switch (cmd) {
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/* get information */
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case SNDRV_DM_FM_IOCTL_INFO:
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{
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snd_dm_fm_info_t info;
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info.fm_mode = opl3->fm_mode;
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info.rhythm = opl3->rhythm;
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if (copy_to_user(argp, &info, sizeof(snd_dm_fm_info_t)))
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return -EFAULT;
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return 0;
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}
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case SNDRV_DM_FM_IOCTL_RESET:
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#ifdef CONFIG_SND_OSSEMUL
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case SNDRV_DM_FM_OSS_IOCTL_RESET:
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#endif
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snd_opl3_reset(opl3);
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return 0;
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case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
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#ifdef CONFIG_SND_OSSEMUL
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case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
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#endif
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{
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snd_dm_fm_note_t note;
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if (copy_from_user(¬e, argp, sizeof(snd_dm_fm_note_t)))
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return -EFAULT;
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return snd_opl3_play_note(opl3, ¬e);
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}
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case SNDRV_DM_FM_IOCTL_SET_VOICE:
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#ifdef CONFIG_SND_OSSEMUL
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case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
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#endif
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{
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snd_dm_fm_voice_t voice;
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if (copy_from_user(&voice, argp, sizeof(snd_dm_fm_voice_t)))
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return -EFAULT;
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return snd_opl3_set_voice(opl3, &voice);
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}
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case SNDRV_DM_FM_IOCTL_SET_PARAMS:
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#ifdef CONFIG_SND_OSSEMUL
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case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
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#endif
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{
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snd_dm_fm_params_t params;
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if (copy_from_user(¶ms, argp, sizeof(snd_dm_fm_params_t)))
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return -EFAULT;
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return snd_opl3_set_params(opl3, ¶ms);
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}
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case SNDRV_DM_FM_IOCTL_SET_MODE:
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#ifdef CONFIG_SND_OSSEMUL
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case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
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#endif
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return snd_opl3_set_mode(opl3, (int) arg);
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case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
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#ifdef CONFIG_SND_OSSEMUL
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case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
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#endif
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return snd_opl3_set_connection(opl3, (int) arg);
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#ifdef CONFIG_SND_DEBUG
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default:
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snd_printk("unknown IOCTL: 0x%x\n", cmd);
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#endif
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}
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return -ENOTTY;
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}
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/*
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* close the device
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*/
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int snd_opl3_release(snd_hwdep_t * hw, struct file *file)
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{
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opl3_t *opl3 = hw->private_data;
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snd_opl3_reset(opl3);
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down(&opl3->access_mutex);
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opl3->used--;
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up(&opl3->access_mutex);
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return 0;
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}
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/* ------------------------------ */
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void snd_opl3_reset(opl3_t * opl3)
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{
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unsigned short opl3_reg;
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unsigned short reg_side;
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unsigned char voice_offset;
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int max_voices, i;
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max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
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MAX_OPL2_VOICES : MAX_OPL3_VOICES;
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for (i = 0; i < max_voices; i++) {
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/* Get register array side and offset of voice */
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if (i < MAX_OPL2_VOICES) {
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/* Left register block for voices 0 .. 8 */
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reg_side = OPL3_LEFT;
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voice_offset = i;
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} else {
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/* Right register block for voices 9 .. 17 */
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reg_side = OPL3_RIGHT;
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voice_offset = i - MAX_OPL2_VOICES;
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}
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
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opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
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opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
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opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
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opl3->command(opl3, opl3_reg, 0x00); /* Note off */
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}
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opl3->max_voices = MAX_OPL2_VOICES;
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opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
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opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
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opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */
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opl3->rhythm = 0;
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}
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static int snd_opl3_play_note(opl3_t * opl3, snd_dm_fm_note_t * note)
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{
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unsigned short reg_side;
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unsigned char voice_offset;
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unsigned short opl3_reg;
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unsigned char reg_val;
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/* Voices 0 - 8 in OPL2 mode */
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/* Voices 0 - 17 in OPL3 mode */
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if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
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MAX_OPL3_VOICES : MAX_OPL2_VOICES))
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return -EINVAL;
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/* Get register array side and offset of voice */
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if (note->voice < MAX_OPL2_VOICES) {
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/* Left register block for voices 0 .. 8 */
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reg_side = OPL3_LEFT;
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voice_offset = note->voice;
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} else {
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/* Right register block for voices 9 .. 17 */
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reg_side = OPL3_RIGHT;
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voice_offset = note->voice - MAX_OPL2_VOICES;
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}
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/* Set lower 8 bits of note frequency */
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reg_val = (unsigned char) note->fnum;
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opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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reg_val = 0x00;
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/* Set output sound flag */
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if (note->key_on)
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reg_val |= OPL3_KEYON_BIT;
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/* Set octave */
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reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
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/* Set higher 2 bits of note frequency */
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reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
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/* Set OPL3 KEYON_BLOCK register of requested voice */
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opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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return 0;
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}
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static int snd_opl3_set_voice(opl3_t * opl3, snd_dm_fm_voice_t * voice)
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{
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unsigned short reg_side;
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unsigned char op_offset;
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unsigned char voice_offset;
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unsigned short opl3_reg;
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unsigned char reg_val;
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/* Only operators 1 and 2 */
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if (voice->op > 1)
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return -EINVAL;
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/* Voices 0 - 8 in OPL2 mode */
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/* Voices 0 - 17 in OPL3 mode */
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if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
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MAX_OPL3_VOICES : MAX_OPL2_VOICES))
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return -EINVAL;
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/* Get register array side and offset of voice */
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if (voice->voice < MAX_OPL2_VOICES) {
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/* Left register block for voices 0 .. 8 */
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reg_side = OPL3_LEFT;
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voice_offset = voice->voice;
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} else {
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/* Right register block for voices 9 .. 17 */
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reg_side = OPL3_RIGHT;
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voice_offset = voice->voice - MAX_OPL2_VOICES;
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}
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/* Get register offset of operator */
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op_offset = snd_opl3_regmap[voice_offset][voice->op];
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reg_val = 0x00;
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/* Set amplitude modulation (tremolo) effect */
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if (voice->am)
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reg_val |= OPL3_TREMOLO_ON;
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/* Set vibrato effect */
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if (voice->vibrato)
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reg_val |= OPL3_VIBRATO_ON;
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/* Set sustaining sound phase */
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if (voice->do_sustain)
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reg_val |= OPL3_SUSTAIN_ON;
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/* Set keyboard scaling bit */
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if (voice->kbd_scale)
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reg_val |= OPL3_KSR;
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/* Set harmonic or frequency multiplier */
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reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
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/* Set OPL3 AM_VIB register of requested voice/operator */
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opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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/* Set decreasing volume of higher notes */
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reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
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/* Set output volume */
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reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
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/* Set OPL3 KSL_LEVEL register of requested voice/operator */
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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/* Set attack phase level */
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reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
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/* Set decay phase level */
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reg_val |= voice->decay & OPL3_DECAY_MASK;
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/* Set OPL3 ATTACK_DECAY register of requested voice/operator */
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opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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/* Set sustain phase level */
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reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
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/* Set release phase level */
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reg_val |= voice->release & OPL3_RELEASE_MASK;
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/* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
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opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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/* Set inter-operator feedback */
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reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
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/* Set inter-operator connection */
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if (voice->connection)
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reg_val |= OPL3_CONNECTION_BIT;
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/* OPL-3 only */
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if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
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if (voice->left)
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reg_val |= OPL3_VOICE_TO_LEFT;
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if (voice->right)
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reg_val |= OPL3_VOICE_TO_RIGHT;
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}
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/* Feedback/connection bits are applicable to voice */
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opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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/* Select waveform */
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reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
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opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
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opl3->command(opl3, opl3_reg, reg_val);
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return 0;
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}
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static int snd_opl3_set_params(opl3_t * opl3, snd_dm_fm_params_t * params)
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{
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unsigned char reg_val;
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reg_val = 0x00;
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/* Set keyboard split method */
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if (params->kbd_split)
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reg_val |= OPL3_KEYBOARD_SPLIT;
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opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
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reg_val = 0x00;
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/* Set amplitude modulation (tremolo) depth */
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if (params->am_depth)
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reg_val |= OPL3_TREMOLO_DEPTH;
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/* Set vibrato depth */
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if (params->vib_depth)
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reg_val |= OPL3_VIBRATO_DEPTH;
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/* Set percussion mode */
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if (params->rhythm) {
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reg_val |= OPL3_PERCUSSION_ENABLE;
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opl3->rhythm = 1;
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} else {
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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(opl3_t * 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(opl3_t * 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;
|
||
|
}
|