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path: root/sound/pci/emu10k1/emu10k1_callback.c
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Diffstat (limited to 'sound/pci/emu10k1/emu10k1_callback.c')
-rw-r--r--sound/pci/emu10k1/emu10k1_callback.c540
1 files changed, 540 insertions, 0 deletions
diff --git a/sound/pci/emu10k1/emu10k1_callback.c b/sound/pci/emu10k1/emu10k1_callback.c
new file mode 100644
index 000000000000..7cf2f908eed9
--- /dev/null
+++ b/sound/pci/emu10k1/emu10k1_callback.c
@@ -0,0 +1,540 @@
+/*
+ * synth callback routines for Emu10k1
+ *
+ * Copyright (C) 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 "emu10k1_synth_local.h"
+#include <sound/asoundef.h>
+
+/* voice status */
+enum {
+ V_FREE=0, V_OFF, V_RELEASED, V_PLAYING, V_END
+};
+
+/* Keeps track of what we are finding */
+typedef struct best_voice {
+ unsigned int time;
+ int voice;
+} best_voice_t;
+
+/*
+ * prototypes
+ */
+static void lookup_voices(snd_emux_t *emu, emu10k1_t *hw, best_voice_t *best, int active_only);
+static snd_emux_voice_t *get_voice(snd_emux_t *emu, snd_emux_port_t *port);
+static int start_voice(snd_emux_voice_t *vp);
+static void trigger_voice(snd_emux_voice_t *vp);
+static void release_voice(snd_emux_voice_t *vp);
+static void update_voice(snd_emux_voice_t *vp, int update);
+static void terminate_voice(snd_emux_voice_t *vp);
+static void free_voice(snd_emux_voice_t *vp);
+
+static void set_fmmod(emu10k1_t *hw, snd_emux_voice_t *vp);
+static void set_fm2frq2(emu10k1_t *hw, snd_emux_voice_t *vp);
+static void set_filterQ(emu10k1_t *hw, snd_emux_voice_t *vp);
+
+/*
+ * 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 snd_emux_operators_t emu10k1_ops = {
+ .owner = THIS_MODULE,
+ .get_voice = get_voice,
+ .prepare = start_voice,
+ .trigger = trigger_voice,
+ .release = release_voice,
+ .update = update_voice,
+ .terminate = terminate_voice,
+ .free_voice = free_voice,
+ .sample_new = snd_emu10k1_sample_new,
+ .sample_free = snd_emu10k1_sample_free,
+};
+
+void
+snd_emu10k1_ops_setup(snd_emux_t *emu)
+{
+ emu->ops = emu10k1_ops;
+}
+
+
+/*
+ * get more voice for pcm
+ *
+ * terminate most inactive voice and give it as a pcm voice.
+ */
+int
+snd_emu10k1_synth_get_voice(emu10k1_t *hw)
+{
+ snd_emux_t *emu;
+ snd_emux_voice_t *vp;
+ best_voice_t best[V_END];
+ unsigned long flags;
+ int i;
+
+ emu = hw->synth;
+
+ spin_lock_irqsave(&emu->voice_lock, flags);
+ lookup_voices(emu, hw, best, 1); /* no OFF voices */
+ for (i = 0; i < V_END; i++) {
+ if (best[i].voice >= 0) {
+ int ch;
+ vp = &emu->voices[best[i].voice];
+ if ((ch = vp->ch) < 0) {
+ //printk("synth_get_voice: ch < 0 (%d) ??", i);
+ continue;
+ }
+ vp->emu->num_voices--;
+ vp->ch = -1;
+ vp->state = SNDRV_EMUX_ST_OFF;
+ spin_unlock_irqrestore(&emu->voice_lock, flags);
+ return ch;
+ }
+ }
+ spin_unlock_irqrestore(&emu->voice_lock, flags);
+
+ /* not found */
+ return -ENOMEM;
+}
+
+
+/*
+ * turn off the voice (not terminated)
+ */
+static void
+release_voice(snd_emux_voice_t *vp)
+{
+ int dcysusv;
+ emu10k1_t *hw;
+
+ hw = vp->hw;
+ dcysusv = 0x8000 | (unsigned char)vp->reg.parm.modrelease;
+ snd_emu10k1_ptr_write(hw, DCYSUSM, vp->ch, dcysusv);
+ dcysusv = 0x8000 | (unsigned char)vp->reg.parm.volrelease | DCYSUSV_CHANNELENABLE_MASK;
+ snd_emu10k1_ptr_write(hw, DCYSUSV, vp->ch, dcysusv);
+}
+
+
+/*
+ * terminate the voice
+ */
+static void
+terminate_voice(snd_emux_voice_t *vp)
+{
+ emu10k1_t *hw;
+
+ snd_assert(vp, return);
+ hw = vp->hw;
+ snd_emu10k1_ptr_write(hw, DCYSUSV, vp->ch, 0x807f | DCYSUSV_CHANNELENABLE_MASK);
+ if (vp->block) {
+ emu10k1_memblk_t *emem;
+ emem = (emu10k1_memblk_t *)vp->block;
+ if (emem->map_locked > 0)
+ emem->map_locked--;
+ }
+}
+
+/*
+ * release the voice to system
+ */
+static void
+free_voice(snd_emux_voice_t *vp)
+{
+ emu10k1_t *hw;
+
+ hw = vp->hw;
+ if (vp->ch >= 0) {
+ snd_emu10k1_ptr_write(hw, IFATN, vp->ch, 0xff00);
+ snd_emu10k1_ptr_write(hw, DCYSUSV, vp->ch, 0x807f | DCYSUSV_CHANNELENABLE_MASK);
+ // snd_emu10k1_ptr_write(hw, DCYSUSV, vp->ch, 0);
+ snd_emu10k1_ptr_write(hw, VTFT, vp->ch, 0xffff);
+ snd_emu10k1_ptr_write(hw, CVCF, vp->ch, 0xffff);
+ snd_emu10k1_voice_free(hw, &hw->voices[vp->ch]);
+ vp->emu->num_voices--;
+ vp->ch = -1;
+ }
+}
+
+
+/*
+ * update registers
+ */
+static void
+update_voice(snd_emux_voice_t *vp, int update)
+{
+ emu10k1_t *hw;
+
+ hw = vp->hw;
+ if (update & SNDRV_EMUX_UPDATE_VOLUME)
+ snd_emu10k1_ptr_write(hw, IFATN_ATTENUATION, vp->ch, vp->avol);
+ if (update & SNDRV_EMUX_UPDATE_PITCH)
+ snd_emu10k1_ptr_write(hw, IP, vp->ch, vp->apitch);
+ if (update & SNDRV_EMUX_UPDATE_PAN) {
+ snd_emu10k1_ptr_write(hw, PTRX_FXSENDAMOUNT_A, vp->ch, vp->apan);
+ snd_emu10k1_ptr_write(hw, PTRX_FXSENDAMOUNT_B, vp->ch, vp->aaux);
+ }
+ if (update & SNDRV_EMUX_UPDATE_FMMOD)
+ set_fmmod(hw, vp);
+ if (update & SNDRV_EMUX_UPDATE_TREMFREQ)
+ snd_emu10k1_ptr_write(hw, TREMFRQ, vp->ch, vp->reg.parm.tremfrq);
+ if (update & SNDRV_EMUX_UPDATE_FM2FRQ2)
+ set_fm2frq2(hw, vp);
+ if (update & SNDRV_EMUX_UPDATE_Q)
+ set_filterQ(hw, vp);
+}
+
+
+/*
+ * look up voice table - get the best voice in order of preference
+ */
+/* spinlock held! */
+static void
+lookup_voices(snd_emux_t *emu, emu10k1_t *hw, best_voice_t *best, int active_only)
+{
+ snd_emux_voice_t *vp;
+ best_voice_t *bp;
+ int i;
+
+ for (i = 0; i < V_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.
+ * NOTE: could also look at volume and pick the quietest one.
+ */
+ for (i = 0; i < emu->max_voices; i++) {
+ int state, val;
+
+ vp = &emu->voices[i];
+ state = vp->state;
+ if (state == SNDRV_EMUX_ST_OFF) {
+ if (vp->ch < 0) {
+ if (active_only)
+ continue;
+ bp = best + V_FREE;
+ } else
+ bp = best + V_OFF;
+ }
+ else if (state == SNDRV_EMUX_ST_RELEASED ||
+ state == SNDRV_EMUX_ST_PENDING) {
+ bp = best + V_RELEASED;
+#if 0
+ val = snd_emu10k1_ptr_read(hw, CVCF_CURRENTVOL, vp->ch);
+ if (! val)
+ bp = best + V_OFF;
+#endif
+ }
+ else if (state == SNDRV_EMUX_ST_STANDBY)
+ continue;
+ else if (state & SNDRV_EMUX_ST_ON)
+ bp = best + V_PLAYING;
+ else
+ continue;
+
+ /* check if sample is finished playing (non-looping only) */
+ if (bp != best + V_OFF && bp != best + V_FREE &&
+ (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_SINGLESHOT)) {
+ val = snd_emu10k1_ptr_read(hw, CCCA_CURRADDR, vp->ch);
+ if (val >= vp->reg.loopstart)
+ bp = best + V_OFF;
+ }
+
+ if (vp->time < bp->time) {
+ bp->time = vp->time;
+ bp->voice = i;
+ }
+ }
+}
+
+/*
+ * get an empty voice
+ *
+ * emu->voice_lock is already held.
+ */
+static snd_emux_voice_t *
+get_voice(snd_emux_t *emu, snd_emux_port_t *port)
+{
+ emu10k1_t *hw;
+ snd_emux_voice_t *vp;
+ best_voice_t best[V_END];
+ int i;
+
+ hw = emu->hw;
+
+ lookup_voices(emu, hw, best, 0);
+ for (i = 0; i < V_END; i++) {
+ if (best[i].voice >= 0) {
+ vp = &emu->voices[best[i].voice];
+ if (vp->ch < 0) {
+ /* allocate a voice */
+ emu10k1_voice_t *hwvoice;
+ if (snd_emu10k1_voice_alloc(hw, EMU10K1_SYNTH, 1, &hwvoice) < 0 || hwvoice == NULL)
+ continue;
+ vp->ch = hwvoice->number;
+ emu->num_voices++;
+ }
+ return vp;
+ }
+ }
+
+ /* not found */
+ return NULL;
+}
+
+/*
+ * prepare envelopes and LFOs
+ */
+static int
+start_voice(snd_emux_voice_t *vp)
+{
+ unsigned int temp;
+ int ch;
+ unsigned int addr, mapped_offset;
+ snd_midi_channel_t *chan;
+ emu10k1_t *hw;
+ emu10k1_memblk_t *emem;
+
+ hw = vp->hw;
+ ch = vp->ch;
+ snd_assert(ch >= 0, return -EINVAL);
+ chan = vp->chan;
+
+ emem = (emu10k1_memblk_t *)vp->block;
+ if (emem == NULL)
+ return -EINVAL;
+ emem->map_locked++;
+ if (snd_emu10k1_memblk_map(hw, emem) < 0) {
+ // printk("emu: cannot map!\n");
+ return -ENOMEM;
+ }
+ mapped_offset = snd_emu10k1_memblk_offset(emem) >> 1;
+ vp->reg.start += mapped_offset;
+ vp->reg.end += mapped_offset;
+ vp->reg.loopstart += mapped_offset;
+ vp->reg.loopend += mapped_offset;
+
+ /* set channel routing */
+ /* A = left(0), B = right(1), C = reverb(c), D = chorus(d) */
+ if (hw->audigy) {
+ temp = FXBUS_MIDI_LEFT | (FXBUS_MIDI_RIGHT << 8) |
+ (FXBUS_MIDI_REVERB << 16) | (FXBUS_MIDI_CHORUS << 24);
+ snd_emu10k1_ptr_write(hw, A_FXRT1, ch, temp);
+ } else {
+ temp = (FXBUS_MIDI_LEFT << 16) | (FXBUS_MIDI_RIGHT << 20) |
+ (FXBUS_MIDI_REVERB << 24) | (FXBUS_MIDI_CHORUS << 28);
+ snd_emu10k1_ptr_write(hw, FXRT, ch, temp);
+ }
+
+ /* channel to be silent and idle */
+ snd_emu10k1_ptr_write(hw, DCYSUSV, ch, 0x0080);
+ snd_emu10k1_ptr_write(hw, VTFT, ch, 0x0000FFFF);
+ snd_emu10k1_ptr_write(hw, CVCF, ch, 0x0000FFFF);
+ snd_emu10k1_ptr_write(hw, PTRX, ch, 0);
+ snd_emu10k1_ptr_write(hw, CPF, ch, 0);
+
+ /* set pitch offset */
+ snd_emu10k1_ptr_write(hw, IP, vp->ch, vp->apitch);
+
+ /* set envelope parameters */
+ snd_emu10k1_ptr_write(hw, ENVVAL, ch, vp->reg.parm.moddelay);
+ snd_emu10k1_ptr_write(hw, ATKHLDM, ch, vp->reg.parm.modatkhld);
+ snd_emu10k1_ptr_write(hw, DCYSUSM, ch, vp->reg.parm.moddcysus);
+ snd_emu10k1_ptr_write(hw, ENVVOL, ch, vp->reg.parm.voldelay);
+ snd_emu10k1_ptr_write(hw, ATKHLDV, ch, vp->reg.parm.volatkhld);
+ /* decay/sustain parameter for volume envelope is used
+ for triggerg the voice */
+
+ /* cutoff and volume */
+ temp = (unsigned int)vp->acutoff << 8 | (unsigned char)vp->avol;
+ snd_emu10k1_ptr_write(hw, IFATN, vp->ch, temp);
+
+ /* modulation envelope heights */
+ snd_emu10k1_ptr_write(hw, PEFE, ch, vp->reg.parm.pefe);
+
+ /* lfo1/2 delay */
+ snd_emu10k1_ptr_write(hw, LFOVAL1, ch, vp->reg.parm.lfo1delay);
+ snd_emu10k1_ptr_write(hw, LFOVAL2, ch, vp->reg.parm.lfo2delay);
+
+ /* lfo1 pitch & cutoff shift */
+ set_fmmod(hw, vp);
+ /* lfo1 volume & freq */
+ snd_emu10k1_ptr_write(hw, TREMFRQ, vp->ch, vp->reg.parm.tremfrq);
+ /* lfo2 pitch & freq */
+ set_fm2frq2(hw, vp);
+
+ /* reverb and loop start (reverb 8bit, MSB) */
+ temp = vp->reg.parm.reverb;
+ temp += (int)vp->chan->control[MIDI_CTL_E1_REVERB_DEPTH] * 9 / 10;
+ LIMITMAX(temp, 255);
+ addr = vp->reg.loopstart;
+ snd_emu10k1_ptr_write(hw, PSST, vp->ch, (temp << 24) | addr);
+
+ /* chorus & loop end (chorus 8bit, MSB) */
+ addr = vp->reg.loopend;
+ temp = vp->reg.parm.chorus;
+ temp += (int)chan->control[MIDI_CTL_E3_CHORUS_DEPTH] * 9 / 10;
+ LIMITMAX(temp, 255);
+ temp = (temp <<24) | addr;
+ snd_emu10k1_ptr_write(hw, DSL, ch, temp);
+
+ /* clear filter delay memory */
+ snd_emu10k1_ptr_write(hw, Z1, ch, 0);
+ snd_emu10k1_ptr_write(hw, Z2, ch, 0);
+
+ /* invalidate maps */
+ temp = (hw->silent_page.addr << 1) | MAP_PTI_MASK;
+ snd_emu10k1_ptr_write(hw, MAPA, ch, temp);
+ snd_emu10k1_ptr_write(hw, MAPB, ch, temp);
+#if 0
+ /* cache */
+ {
+ unsigned int val, sample;
+ val = 32;
+ if (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_8BITS)
+ sample = 0x80808080;
+ else {
+ sample = 0;
+ val *= 2;
+ }
+
+ /* cache */
+ snd_emu10k1_ptr_write(hw, CCR, ch, 0x1c << 16);
+ snd_emu10k1_ptr_write(hw, CDE, ch, sample);
+ snd_emu10k1_ptr_write(hw, CDF, ch, sample);
+
+ /* invalidate maps */
+ temp = ((unsigned int)hw->silent_page.addr << 1) | MAP_PTI_MASK;
+ snd_emu10k1_ptr_write(hw, MAPA, ch, temp);
+ snd_emu10k1_ptr_write(hw, MAPB, ch, temp);
+
+ /* fill cache */
+ val -= 4;
+ val <<= 25;
+ val |= 0x1c << 16;
+ snd_emu10k1_ptr_write(hw, CCR, ch, val);
+ }
+#endif
+
+ /* Q & current address (Q 4bit value, MSB) */
+ addr = vp->reg.start;
+ temp = vp->reg.parm.filterQ;
+ temp = (temp<<28) | addr;
+ if (vp->apitch < 0xe400)
+ temp |= CCCA_INTERPROM_0;
+ else {
+ unsigned int shift = (vp->apitch - 0xe000) >> 10;
+ temp |= shift << 25;
+ }
+ if (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_8BITS)
+ temp |= CCCA_8BITSELECT;
+ snd_emu10k1_ptr_write(hw, CCCA, ch, temp);
+
+ /* reset volume */
+ temp = (unsigned int)vp->vtarget << 16;
+ snd_emu10k1_ptr_write(hw, VTFT, ch, temp | vp->ftarget);
+ snd_emu10k1_ptr_write(hw, CVCF, ch, temp | 0xff00);
+ return 0;
+}
+
+/*
+ * Start envelope
+ */
+static void
+trigger_voice(snd_emux_voice_t *vp)
+{
+ unsigned int temp, ptarget;
+ emu10k1_t *hw;
+ emu10k1_memblk_t *emem;
+
+ hw = vp->hw;
+
+ emem = (emu10k1_memblk_t *)vp->block;
+ if (! emem || emem->mapped_page < 0)
+ return; /* not mapped */
+
+#if 0
+ ptarget = (unsigned int)vp->ptarget << 16;
+#else
+ ptarget = IP_TO_CP(vp->apitch);
+#endif
+ /* set pitch target and pan (volume) */
+ temp = ptarget | (vp->apan << 8) | vp->aaux;
+ snd_emu10k1_ptr_write(hw, PTRX, vp->ch, temp);
+
+ /* pitch target */
+ snd_emu10k1_ptr_write(hw, CPF, vp->ch, ptarget);
+
+ /* trigger voice */
+ snd_emu10k1_ptr_write(hw, DCYSUSV, vp->ch, vp->reg.parm.voldcysus|DCYSUSV_CHANNELENABLE_MASK);
+}
+
+#define MOD_SENSE 18
+
+/* set lfo1 modulation height and cutoff */
+static void
+set_fmmod(emu10k1_t *hw, snd_emux_voice_t *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;
+ snd_emu10k1_ptr_write(hw, FMMOD, vp->ch, fmmod);
+}
+
+/* set lfo2 pitch & frequency */
+static void
+set_fm2frq2(emu10k1_t *hw, snd_emux_voice_t *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;
+ snd_emu10k1_ptr_write(hw, FM2FRQ2, vp->ch, fm2frq2);
+}
+
+/* set filterQ */
+static void
+set_filterQ(emu10k1_t *hw, snd_emux_voice_t *vp)
+{
+ unsigned int val;
+ val = snd_emu10k1_ptr_read(hw, CCCA, vp->ch) & ~CCCA_RESONANCE;
+ val |= (vp->reg.parm.filterQ << 28);
+ snd_emu10k1_ptr_write(hw, CCCA, vp->ch, val);
+}
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