535 lines
13 KiB
C
535 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* synth callback routines for the emu8000 (AWE32/64)
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*
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* Copyright (C) 1999 Steve Ratcliffe
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* Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
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*/
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#include "emu8000_local.h"
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#include <linux/export.h>
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#include <sound/asoundef.h>
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/*
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* prototypes
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*/
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static struct snd_emux_voice *get_voice(struct snd_emux *emu,
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struct snd_emux_port *port);
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static int start_voice(struct snd_emux_voice *vp);
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static void trigger_voice(struct snd_emux_voice *vp);
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static void release_voice(struct snd_emux_voice *vp);
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static void update_voice(struct snd_emux_voice *vp, int update);
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static void reset_voice(struct snd_emux *emu, int ch);
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static void terminate_voice(struct snd_emux_voice *vp);
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static void sysex(struct snd_emux *emu, char *buf, int len, int parsed,
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struct snd_midi_channel_set *chset);
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#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
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static int oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2);
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#endif
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static int load_fx(struct snd_emux *emu, int type, int mode,
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const void __user *buf, long len);
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static void set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
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static void snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int ch);
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/*
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* Ensure a value is between two points
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* macro evaluates its args more than once, so changed to upper-case.
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*/
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#define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
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#define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
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/*
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* set up operators
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*/
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static const struct snd_emux_operators emu8000_ops = {
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.owner = THIS_MODULE,
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.get_voice = get_voice,
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.prepare = start_voice,
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.trigger = trigger_voice,
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.release = release_voice,
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.update = update_voice,
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.terminate = terminate_voice,
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.reset = reset_voice,
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.sample_new = snd_emu8000_sample_new,
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.sample_free = snd_emu8000_sample_free,
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.sample_reset = snd_emu8000_sample_reset,
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.load_fx = load_fx,
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.sysex = sysex,
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#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
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.oss_ioctl = oss_ioctl,
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#endif
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};
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void
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snd_emu8000_ops_setup(struct snd_emu8000 *hw)
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{
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hw->emu->ops = emu8000_ops;
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}
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/*
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* Terminate a voice
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*/
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static void
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release_voice(struct snd_emux_voice *vp)
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{
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int dcysusv;
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struct snd_emu8000 *hw;
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hw = vp->hw;
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dcysusv = 0x8000 | (unsigned char)vp->reg.parm.modrelease;
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EMU8000_DCYSUS_WRITE(hw, vp->ch, dcysusv);
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dcysusv = 0x8000 | (unsigned char)vp->reg.parm.volrelease;
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EMU8000_DCYSUSV_WRITE(hw, vp->ch, dcysusv);
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}
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/*
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*/
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static void
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terminate_voice(struct snd_emux_voice *vp)
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{
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struct snd_emu8000 *hw;
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hw = vp->hw;
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EMU8000_DCYSUSV_WRITE(hw, vp->ch, 0x807F);
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}
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/*
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*/
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static void
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update_voice(struct snd_emux_voice *vp, int update)
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{
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struct snd_emu8000 *hw;
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hw = vp->hw;
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if (update & SNDRV_EMUX_UPDATE_VOLUME)
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set_volume(hw, vp);
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if (update & SNDRV_EMUX_UPDATE_PITCH)
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set_pitch(hw, vp);
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if ((update & SNDRV_EMUX_UPDATE_PAN) &&
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vp->port->ctrls[EMUX_MD_REALTIME_PAN])
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set_pan(hw, vp);
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if (update & SNDRV_EMUX_UPDATE_FMMOD)
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set_fmmod(hw, vp);
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if (update & SNDRV_EMUX_UPDATE_TREMFREQ)
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set_tremfreq(hw, vp);
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if (update & SNDRV_EMUX_UPDATE_FM2FRQ2)
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set_fm2frq2(hw, vp);
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if (update & SNDRV_EMUX_UPDATE_Q)
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set_filterQ(hw, vp);
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}
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/*
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* Find a channel (voice) within the EMU that is not in use or at least
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* less in use than other channels. Always returns a valid pointer
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* no matter what. If there is a real shortage of voices then one
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* will be cut. Such is life.
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*
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* The channel index (vp->ch) must be initialized in this routine.
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* In Emu8k, it is identical with the array index.
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*/
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static struct snd_emux_voice *
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get_voice(struct snd_emux *emu, struct snd_emux_port *port)
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{
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int i;
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struct snd_emux_voice *vp;
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struct snd_emu8000 *hw;
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/* what we are looking for, in order of preference */
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enum {
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OFF=0, RELEASED, PLAYING, END
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};
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/* Keeps track of what we are finding */
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struct best {
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unsigned int time;
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int voice;
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} best[END];
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struct best *bp;
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hw = emu->hw;
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for (i = 0; i < END; i++) {
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best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */
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best[i].voice = -1;
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}
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/*
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* Go through them all and get a best one to use.
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*/
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for (i = 0; i < emu->max_voices; i++) {
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int state, val;
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vp = &emu->voices[i];
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state = vp->state;
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if (state == SNDRV_EMUX_ST_OFF)
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bp = best + OFF;
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else if (state == SNDRV_EMUX_ST_RELEASED ||
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state == SNDRV_EMUX_ST_PENDING) {
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bp = best + RELEASED;
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val = (EMU8000_CVCF_READ(hw, vp->ch) >> 16) & 0xffff;
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if (! val)
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bp = best + OFF;
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}
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else if (state & SNDRV_EMUX_ST_ON)
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bp = best + PLAYING;
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else
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continue;
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/* check if sample is finished playing (non-looping only) */
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if (state != SNDRV_EMUX_ST_OFF &&
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(vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_SINGLESHOT)) {
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val = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
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if (val >= vp->reg.loopstart)
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bp = best + OFF;
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}
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if (vp->time < bp->time) {
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bp->time = vp->time;
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bp->voice = i;
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}
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}
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for (i = 0; i < END; i++) {
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if (best[i].voice >= 0) {
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vp = &emu->voices[best[i].voice];
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vp->ch = best[i].voice;
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return vp;
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}
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}
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/* not found */
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return NULL;
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}
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/*
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*/
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static int
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start_voice(struct snd_emux_voice *vp)
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{
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unsigned int temp;
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int ch;
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int addr;
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struct snd_midi_channel *chan;
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struct snd_emu8000 *hw;
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hw = vp->hw;
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ch = vp->ch;
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chan = vp->chan;
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/* channel to be silent and idle */
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EMU8000_DCYSUSV_WRITE(hw, ch, 0x0080);
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EMU8000_VTFT_WRITE(hw, ch, 0x0000FFFF);
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EMU8000_CVCF_WRITE(hw, ch, 0x0000FFFF);
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EMU8000_PTRX_WRITE(hw, ch, 0);
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EMU8000_CPF_WRITE(hw, ch, 0);
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/* set pitch offset */
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set_pitch(hw, vp);
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/* set envelope parameters */
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EMU8000_ENVVAL_WRITE(hw, ch, vp->reg.parm.moddelay);
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EMU8000_ATKHLD_WRITE(hw, ch, vp->reg.parm.modatkhld);
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EMU8000_DCYSUS_WRITE(hw, ch, vp->reg.parm.moddcysus);
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EMU8000_ENVVOL_WRITE(hw, ch, vp->reg.parm.voldelay);
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EMU8000_ATKHLDV_WRITE(hw, ch, vp->reg.parm.volatkhld);
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/* decay/sustain parameter for volume envelope is used
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for triggerg the voice */
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/* cutoff and volume */
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set_volume(hw, vp);
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/* modulation envelope heights */
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EMU8000_PEFE_WRITE(hw, ch, vp->reg.parm.pefe);
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/* lfo1/2 delay */
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EMU8000_LFO1VAL_WRITE(hw, ch, vp->reg.parm.lfo1delay);
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EMU8000_LFO2VAL_WRITE(hw, ch, vp->reg.parm.lfo2delay);
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/* lfo1 pitch & cutoff shift */
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set_fmmod(hw, vp);
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/* lfo1 volume & freq */
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set_tremfreq(hw, vp);
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/* lfo2 pitch & freq */
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set_fm2frq2(hw, vp);
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/* pan & loop start */
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set_pan(hw, vp);
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/* chorus & loop end (chorus 8bit, MSB) */
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addr = vp->reg.loopend - 1;
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temp = vp->reg.parm.chorus;
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temp += (int)chan->control[MIDI_CTL_E3_CHORUS_DEPTH] * 9 / 10;
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LIMITMAX(temp, 255);
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temp = (temp <<24) | (unsigned int)addr;
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EMU8000_CSL_WRITE(hw, ch, temp);
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/* Q & current address (Q 4bit value, MSB) */
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addr = vp->reg.start - 1;
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temp = vp->reg.parm.filterQ;
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temp = (temp<<28) | (unsigned int)addr;
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EMU8000_CCCA_WRITE(hw, ch, temp);
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/* clear unknown registers */
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EMU8000_00A0_WRITE(hw, ch, 0);
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EMU8000_0080_WRITE(hw, ch, 0);
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/* reset volume */
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temp = vp->vtarget << 16;
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EMU8000_VTFT_WRITE(hw, ch, temp | vp->ftarget);
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EMU8000_CVCF_WRITE(hw, ch, temp | 0xff00);
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return 0;
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}
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/*
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* Start envelope
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*/
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static void
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trigger_voice(struct snd_emux_voice *vp)
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{
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int ch = vp->ch;
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unsigned int temp;
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struct snd_emu8000 *hw;
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hw = vp->hw;
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/* set reverb and pitch target */
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temp = vp->reg.parm.reverb;
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temp += (int)vp->chan->control[MIDI_CTL_E1_REVERB_DEPTH] * 9 / 10;
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LIMITMAX(temp, 255);
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temp = (temp << 8) | (vp->ptarget << 16) | vp->aaux;
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EMU8000_PTRX_WRITE(hw, ch, temp);
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EMU8000_CPF_WRITE(hw, ch, vp->ptarget << 16);
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EMU8000_DCYSUSV_WRITE(hw, ch, vp->reg.parm.voldcysus);
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}
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/*
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* reset voice parameters
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*/
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static void
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reset_voice(struct snd_emux *emu, int ch)
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{
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struct snd_emu8000 *hw;
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hw = emu->hw;
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EMU8000_DCYSUSV_WRITE(hw, ch, 0x807F);
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snd_emu8000_tweak_voice(hw, ch);
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}
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/*
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* Set the pitch of a possibly playing note.
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*/
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static void
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set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
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{
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EMU8000_IP_WRITE(hw, vp->ch, vp->apitch);
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}
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/*
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* Set the volume of a possibly already playing note
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*/
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static void
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set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
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{
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int ifatn;
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ifatn = (unsigned char)vp->acutoff;
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ifatn = (ifatn << 8);
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ifatn |= (unsigned char)vp->avol;
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EMU8000_IFATN_WRITE(hw, vp->ch, ifatn);
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}
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/*
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* Set pan and loop start address.
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*/
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static void
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set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
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{
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unsigned int temp;
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temp = ((unsigned int)vp->apan<<24) | ((unsigned int)vp->reg.loopstart - 1);
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||
|
|
EMU8000_PSST_WRITE(hw, vp->ch, temp);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MOD_SENSE 18
|
||
|
|
|
||
|
|
static void
|
||
|
|
set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
unsigned short fmmod;
|
||
|
|
short pitch;
|
||
|
|
unsigned char cutoff;
|
||
|
|
int modulation;
|
||
|
|
|
||
|
|
pitch = (char)(vp->reg.parm.fmmod>>8);
|
||
|
|
cutoff = (vp->reg.parm.fmmod & 0xff);
|
||
|
|
modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
|
||
|
|
pitch += (MOD_SENSE * modulation) / 1200;
|
||
|
|
LIMITVALUE(pitch, -128, 127);
|
||
|
|
fmmod = ((unsigned char)pitch<<8) | cutoff;
|
||
|
|
EMU8000_FMMOD_WRITE(hw, vp->ch, fmmod);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set tremolo (lfo1) volume & frequency */
|
||
|
|
static void
|
||
|
|
set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
EMU8000_TREMFRQ_WRITE(hw, vp->ch, vp->reg.parm.tremfrq);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set lfo2 pitch & frequency */
|
||
|
|
static void
|
||
|
|
set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
unsigned short fm2frq2;
|
||
|
|
short pitch;
|
||
|
|
unsigned char freq;
|
||
|
|
int modulation;
|
||
|
|
|
||
|
|
pitch = (char)(vp->reg.parm.fm2frq2>>8);
|
||
|
|
freq = vp->reg.parm.fm2frq2 & 0xff;
|
||
|
|
modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
|
||
|
|
pitch += (MOD_SENSE * modulation) / 1200;
|
||
|
|
LIMITVALUE(pitch, -128, 127);
|
||
|
|
fm2frq2 = ((unsigned char)pitch<<8) | freq;
|
||
|
|
EMU8000_FM2FRQ2_WRITE(hw, vp->ch, fm2frq2);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set filterQ */
|
||
|
|
static void
|
||
|
|
set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
unsigned int addr;
|
||
|
|
addr = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
|
||
|
|
addr |= (vp->reg.parm.filterQ << 28);
|
||
|
|
EMU8000_CCCA_WRITE(hw, vp->ch, addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* set the envelope & LFO parameters to the default values
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int i)
|
||
|
|
{
|
||
|
|
/* set all mod/vol envelope shape to minimum */
|
||
|
|
EMU8000_ENVVOL_WRITE(emu, i, 0x8000);
|
||
|
|
EMU8000_ENVVAL_WRITE(emu, i, 0x8000);
|
||
|
|
EMU8000_DCYSUS_WRITE(emu, i, 0x7F7F);
|
||
|
|
EMU8000_ATKHLDV_WRITE(emu, i, 0x7F7F);
|
||
|
|
EMU8000_ATKHLD_WRITE(emu, i, 0x7F7F);
|
||
|
|
EMU8000_PEFE_WRITE(emu, i, 0); /* mod envelope height to zero */
|
||
|
|
EMU8000_LFO1VAL_WRITE(emu, i, 0x8000); /* no delay for LFO1 */
|
||
|
|
EMU8000_LFO2VAL_WRITE(emu, i, 0x8000);
|
||
|
|
EMU8000_IP_WRITE(emu, i, 0xE000); /* no pitch shift */
|
||
|
|
EMU8000_IFATN_WRITE(emu, i, 0xFF00); /* volume to minimum */
|
||
|
|
EMU8000_FMMOD_WRITE(emu, i, 0);
|
||
|
|
EMU8000_TREMFRQ_WRITE(emu, i, 0);
|
||
|
|
EMU8000_FM2FRQ2_WRITE(emu, i, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* sysex callback
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
sysex(struct snd_emux *emu, char *buf, int len, int parsed, struct snd_midi_channel_set *chset)
|
||
|
|
{
|
||
|
|
struct snd_emu8000 *hw;
|
||
|
|
|
||
|
|
hw = emu->hw;
|
||
|
|
|
||
|
|
switch (parsed) {
|
||
|
|
case SNDRV_MIDI_SYSEX_GS_CHORUS_MODE:
|
||
|
|
hw->chorus_mode = chset->gs_chorus_mode;
|
||
|
|
snd_emu8000_update_chorus_mode(hw);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case SNDRV_MIDI_SYSEX_GS_REVERB_MODE:
|
||
|
|
hw->reverb_mode = chset->gs_reverb_mode;
|
||
|
|
snd_emu8000_update_reverb_mode(hw);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
|
||
|
|
/*
|
||
|
|
* OSS ioctl callback
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2)
|
||
|
|
{
|
||
|
|
struct snd_emu8000 *hw;
|
||
|
|
|
||
|
|
hw = emu->hw;
|
||
|
|
|
||
|
|
switch (cmd) {
|
||
|
|
case _EMUX_OSS_REVERB_MODE:
|
||
|
|
hw->reverb_mode = p1;
|
||
|
|
snd_emu8000_update_reverb_mode(hw);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case _EMUX_OSS_CHORUS_MODE:
|
||
|
|
hw->chorus_mode = p1;
|
||
|
|
snd_emu8000_update_chorus_mode(hw);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case _EMUX_OSS_INITIALIZE_CHIP:
|
||
|
|
/* snd_emu8000_init(hw); */ /*ignored*/
|
||
|
|
break;
|
||
|
|
|
||
|
|
case _EMUX_OSS_EQUALIZER:
|
||
|
|
hw->bass_level = p1;
|
||
|
|
hw->treble_level = p2;
|
||
|
|
snd_emu8000_update_equalizer(hw);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* additional patch keys
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define SNDRV_EMU8000_LOAD_CHORUS_FX 0x10 /* optarg=mode */
|
||
|
|
#define SNDRV_EMU8000_LOAD_REVERB_FX 0x11 /* optarg=mode */
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* callback routine
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int
|
||
|
|
load_fx(struct snd_emux *emu, int type, int mode, const void __user *buf, long len)
|
||
|
|
{
|
||
|
|
struct snd_emu8000 *hw;
|
||
|
|
hw = emu->hw;
|
||
|
|
|
||
|
|
/* skip header */
|
||
|
|
buf += 16;
|
||
|
|
len -= 16;
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case SNDRV_EMU8000_LOAD_CHORUS_FX:
|
||
|
|
return snd_emu8000_load_chorus_fx(hw, mode, buf, len);
|
||
|
|
case SNDRV_EMU8000_LOAD_REVERB_FX:
|
||
|
|
return snd_emu8000_load_reverb_fx(hw, mode, buf, len);
|
||
|
|
}
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|