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linux/sound/drivers/opl3/opl3_synth.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) by Uros Bizjak <uros@kss-loka.si>
*
* Routines for OPL2/OPL3/OPL4 control
*/
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/nospec.h>
#include <sound/opl3.h>
#include <sound/asound_fm.h>
#include "opl3_voice.h"
#if IS_ENABLED(CONFIG_SND_SEQUENCER)
#define OPL3_SUPPORT_SYNTH
#endif
/*
* 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) */
};
EXPORT_SYMBOL(snd_opl3_regmap);
/*
* 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)
{
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;
if (snd_BUG_ON(!opl3))
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(&note, argp, sizeof(struct snd_dm_fm_note)))
return -EFAULT;
return snd_opl3_play_note(opl3, &note);
}
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(&params, argp, sizeof(struct snd_dm_fm_params)))
return -EFAULT;
return snd_opl3_set_params(opl3, &params);
}
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 OPL3_SUPPORT_SYNTH
case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
snd_opl3_clear_patches(opl3);
return 0;
#endif
#ifdef CONFIG_SND_DEBUG
default:
snd_printk(KERN_WARNING "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);
return 0;
}
#ifdef OPL3_SUPPORT_SYNTH
/*
* write the device - load patches
*/
long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
loff_t *offset)
{
struct snd_opl3 *opl3 = hw->private_data;
long result = 0;
int err = 0;
struct sbi_patch inst;
while (count >= sizeof(inst)) {
unsigned char type;
if (copy_from_user(&inst, buf, sizeof(inst)))
return -EFAULT;
if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
!memcmp(inst.key, FM_KEY_2OP, 4))
type = FM_PATCH_OPL2;
else if (!memcmp(inst.key, FM_KEY_4OP, 4))
type = FM_PATCH_OPL3;
else /* invalid type */
break;
err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
inst.name, inst.extension,
inst.data);
if (err < 0)
break;
result += sizeof(inst);
count -= sizeof(inst);
}
return result > 0 ? result : err;
}
/*
* Patch management
*/
/* offsets for SBI params */
#define AM_VIB 0
#define KSL_LEVEL 2
#define ATTACK_DECAY 4
#define SUSTAIN_RELEASE 6
#define WAVE_SELECT 8
/* offset for SBI instrument */
#define CONNECTION 10
#define OFFSET_4OP 11
/*
* load a patch, obviously.
*
* loaded on the given program and bank numbers with the given type
* (FM_PATCH_OPLx).
* data is the pointer of SBI record _without_ header (key and name).
* name is the name string of the patch.
* ext is the extension data of 7 bytes long (stored in name of SBI
* data up to offset 25), or NULL to skip.
* return 0 if successful or a negative error code.
*/
int snd_opl3_load_patch(struct snd_opl3 *opl3,
int prog, int bank, int type,
const char *name,
const unsigned char *ext,
const unsigned char *data)
{
struct fm_patch *patch;
int i;
patch = snd_opl3_find_patch(opl3, prog, bank, 1);
if (!patch)
return -ENOMEM;
patch->type = type;
for (i = 0; i < 2; i++) {
patch->inst.op[i].am_vib = data[AM_VIB + i];
patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
}
patch->inst.feedback_connection[0] = data[CONNECTION];
if (type == FM_PATCH_OPL3) {
for (i = 0; i < 2; i++) {
patch->inst.op[i+2].am_vib =
data[OFFSET_4OP + AM_VIB + i];
patch->inst.op[i+2].ksl_level =
data[OFFSET_4OP + KSL_LEVEL + i];
patch->inst.op[i+2].attack_decay =
data[OFFSET_4OP + ATTACK_DECAY + i];
patch->inst.op[i+2].sustain_release =
data[OFFSET_4OP + SUSTAIN_RELEASE + i];
patch->inst.op[i+2].wave_select =
data[OFFSET_4OP + WAVE_SELECT + i];
}
patch->inst.feedback_connection[1] =
data[OFFSET_4OP + CONNECTION];
}
if (ext) {
patch->inst.echo_delay = ext[0];
patch->inst.echo_atten = ext[1];
patch->inst.chorus_spread = ext[2];
patch->inst.trnsps = ext[3];
patch->inst.fix_dur = ext[4];
patch->inst.modes = ext[5];
patch->inst.fix_key = ext[6];
}
if (name)
strlcpy(patch->name, name, sizeof(patch->name));
return 0;
}
EXPORT_SYMBOL(snd_opl3_load_patch);
/*
* find a patch with the given program and bank numbers, returns its pointer
* if no matching patch is found and create_patch is set, it creates a
* new patch object.
*/
struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
int create_patch)
{
/* pretty dumb hash key */
unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
struct fm_patch *patch;
for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
if (patch->prog == prog && patch->bank == bank)
return patch;
}
if (!create_patch)
return NULL;
patch = kzalloc(sizeof(*patch), GFP_KERNEL);
if (!patch)
return NULL;
patch->prog = prog;
patch->bank = bank;
patch->next = opl3->patch_table[key];
opl3->patch_table[key] = patch;
return patch;
}
EXPORT_SYMBOL(snd_opl3_find_patch);
/*
* Clear all patches of the given OPL3 instance
*/
void snd_opl3_clear_patches(struct snd_opl3 *opl3)
{
int i;
for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) {
struct fm_patch *patch, *next;
for (patch = opl3->patch_table[i]; patch; patch = next) {
next = patch->next;
kfree(patch);
}
}
memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
}
#endif /* OPL3_SUPPORT_SYNTH */
/* ------------------------------ */
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;
}
EXPORT_SYMBOL(snd_opl3_reset);
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, voice_op;
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 */
voice_offset = array_index_nospec(voice_offset, MAX_OPL2_VOICES);
voice_op = array_index_nospec(voice->op, 4);
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;
}
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