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linux/sound/isa/sb/emu8000_callback.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

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