--- /dev/null
+/*
+ * synth callback routines for the emu8000 (AWE32/64)
+ *
+ * Copyright (C) 1999 Steve Ratcliffe
+ * Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
+ *
+ * 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
+ */
+
+#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);
+#ifdef 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 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,
+#ifdef 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;
+ }
+}
+
+
+#ifdef 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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