622 lines
17 KiB
C
622 lines
17 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 <linux/slab.h>
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#include <linux/export.h>
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#include <linux/nospec.h>
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#include <sound/opl3.h>
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#include <sound/asound_fm.h>
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#if IS_ENABLED(CONFIG_SND_SEQUENCER)
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#define OPL3_SUPPORT_SYNTH
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#endif
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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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EXPORT_SYMBOL(snd_opl3_regmap);
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/*
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* prototypes
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*/
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static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note);
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static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice);
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static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params);
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static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode);
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static int snd_opl3_set_connection(struct snd_opl3 * 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(struct snd_hwdep * hw, struct file *file)
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{
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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(struct snd_hwdep * hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct snd_opl3 *opl3 = hw->private_data;
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void __user *argp = (void __user *)arg;
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if (snd_BUG_ON(!opl3))
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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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struct snd_dm_fm_info info;
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memset(&info, 0, sizeof(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(struct snd_dm_fm_info)))
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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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struct snd_dm_fm_note note;
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if (copy_from_user(¬e, argp, sizeof(struct snd_dm_fm_note)))
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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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struct snd_dm_fm_voice voice;
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if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
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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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struct snd_dm_fm_params params;
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if (copy_from_user(¶ms, argp, sizeof(struct snd_dm_fm_params)))
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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 OPL3_SUPPORT_SYNTH
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case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
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snd_opl3_clear_patches(opl3);
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return 0;
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#endif
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#ifdef CONFIG_SND_DEBUG
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default:
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snd_printk(KERN_WARNING "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(struct snd_hwdep * hw, struct file *file)
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{
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struct snd_opl3 *opl3 = hw->private_data;
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snd_opl3_reset(opl3);
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return 0;
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}
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#ifdef OPL3_SUPPORT_SYNTH
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/*
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* write the device - load patches
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*/
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long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
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loff_t *offset)
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{
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struct snd_opl3 *opl3 = hw->private_data;
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long result = 0;
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int err = 0;
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struct sbi_patch inst;
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while (count >= sizeof(inst)) {
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unsigned char type;
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if (copy_from_user(&inst, buf, sizeof(inst)))
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return -EFAULT;
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if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
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!memcmp(inst.key, FM_KEY_2OP, 4))
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type = FM_PATCH_OPL2;
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else if (!memcmp(inst.key, FM_KEY_4OP, 4))
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type = FM_PATCH_OPL3;
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else /* invalid type */
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break;
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err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
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inst.name, inst.extension,
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inst.data);
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if (err < 0)
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break;
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result += sizeof(inst);
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count -= sizeof(inst);
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}
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return result > 0 ? result : err;
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}
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/*
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* Patch management
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*/
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/* offsets for SBI params */
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#define AM_VIB 0
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#define KSL_LEVEL 2
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#define ATTACK_DECAY 4
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#define SUSTAIN_RELEASE 6
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#define WAVE_SELECT 8
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/* offset for SBI instrument */
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#define CONNECTION 10
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#define OFFSET_4OP 11
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/*
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* load a patch, obviously.
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*
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* loaded on the given program and bank numbers with the given type
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* (FM_PATCH_OPLx).
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* data is the pointer of SBI record _without_ header (key and name).
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* name is the name string of the patch.
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* ext is the extension data of 7 bytes long (stored in name of SBI
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* data up to offset 25), or NULL to skip.
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* return 0 if successful or a negative error code.
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*/
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int snd_opl3_load_patch(struct snd_opl3 *opl3,
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int prog, int bank, int type,
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const char *name,
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const unsigned char *ext,
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const unsigned char *data)
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{
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struct fm_patch *patch;
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int i;
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patch = snd_opl3_find_patch(opl3, prog, bank, 1);
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if (!patch)
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return -ENOMEM;
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patch->type = type;
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for (i = 0; i < 2; i++) {
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patch->inst.op[i].am_vib = data[AM_VIB + i];
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patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
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patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
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patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
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patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
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}
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patch->inst.feedback_connection[0] = data[CONNECTION];
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if (type == FM_PATCH_OPL3) {
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for (i = 0; i < 2; i++) {
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patch->inst.op[i+2].am_vib =
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data[OFFSET_4OP + AM_VIB + i];
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patch->inst.op[i+2].ksl_level =
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data[OFFSET_4OP + KSL_LEVEL + i];
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patch->inst.op[i+2].attack_decay =
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data[OFFSET_4OP + ATTACK_DECAY + i];
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patch->inst.op[i+2].sustain_release =
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data[OFFSET_4OP + SUSTAIN_RELEASE + i];
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patch->inst.op[i+2].wave_select =
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data[OFFSET_4OP + WAVE_SELECT + i];
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}
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patch->inst.feedback_connection[1] =
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data[OFFSET_4OP + CONNECTION];
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}
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if (ext) {
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patch->inst.echo_delay = ext[0];
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patch->inst.echo_atten = ext[1];
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patch->inst.chorus_spread = ext[2];
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patch->inst.trnsps = ext[3];
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patch->inst.fix_dur = ext[4];
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patch->inst.modes = ext[5];
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patch->inst.fix_key = ext[6];
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}
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if (name)
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strlcpy(patch->name, name, sizeof(patch->name));
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return 0;
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}
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EXPORT_SYMBOL(snd_opl3_load_patch);
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/*
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* find a patch with the given program and bank numbers, returns its pointer
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* if no matching patch is found and create_patch is set, it creates a
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* new patch object.
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*/
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struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
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int create_patch)
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{
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/* pretty dumb hash key */
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unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
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struct fm_patch *patch;
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for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
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if (patch->prog == prog && patch->bank == bank)
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return patch;
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}
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if (!create_patch)
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return NULL;
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patch = kzalloc(sizeof(*patch), GFP_KERNEL);
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if (!patch)
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return NULL;
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patch->prog = prog;
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patch->bank = bank;
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patch->next = opl3->patch_table[key];
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opl3->patch_table[key] = patch;
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return patch;
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}
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EXPORT_SYMBOL(snd_opl3_find_patch);
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/*
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* Clear all patches of the given OPL3 instance
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*/
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void snd_opl3_clear_patches(struct snd_opl3 *opl3)
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{
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int i;
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for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) {
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struct fm_patch *patch, *next;
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for (patch = opl3->patch_table[i]; patch; patch = next) {
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next = patch->next;
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kfree(patch);
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}
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}
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memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
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}
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#endif /* OPL3_SUPPORT_SYNTH */
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/* ------------------------------ */
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void snd_opl3_reset(struct snd_opl3 * 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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EXPORT_SYMBOL(snd_opl3_reset);
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static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * 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(struct snd_opl3 * opl3, struct snd_dm_fm_voice * 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, voice_op;
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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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voice_offset = array_index_nospec(voice_offset, MAX_OPL2_VOICES);
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voice_op = array_index_nospec(voice->op, 4);
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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)
|
|
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;
|
|
}
|
|
|