1 files changed, 538 insertions, 0 deletions

diff --git a/sound/pci/emu10k1/emu10k1_callback.c b/sound/pci/emu10k1/emu10k1_callback.c
new file mode 100644
index 000000000..dba1e9fc2
--- /dev/null
+++ b/sound/pci/emu10k1/emu10k1_callback.c
@@ -0,0 +1,538 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  synth callback routines for Emu10k1
+ *
+ *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
+ */
+
+#include <linux/export.h>
+#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 */
+struct best_voice {
+	unsigned int time;
+	int voice;
+};
+
+/*
+ * prototypes
+ */
+static void lookup_voices(struct snd_emux *emux, struct snd_emu10k1 *hw,
+			  struct best_voice *best, int active_only);
+static struct snd_emux_voice *get_voice(struct snd_emux *emux,
+					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 terminate_voice(struct snd_emux_voice *vp);
+static void free_voice(struct snd_emux_voice *vp);
+static void set_fmmod(struct snd_emu10k1 *hw, struct snd_emux_voice *vp);
+static void set_fm2frq2(struct snd_emu10k1 *hw, struct snd_emux_voice *vp);
+static void set_filterQ(struct snd_emu10k1 *hw, struct snd_emux_voice *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 const struct snd_emux_operators 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(struct snd_emux *emux)
+{
+	emux->ops = emu10k1_ops;
+}
+
+
+/*
+ * get more voice for pcm
+ *
+ * terminate most inactive voice and give it as a pcm voice.
+ *
+ * voice_lock is already held.
+ */
+int
+snd_emu10k1_synth_get_voice(struct snd_emu10k1 *hw)
+{
+	struct snd_emux *emu;
+	struct snd_emux_voice *vp;
+	struct best_voice best[V_END];
+	int i;
+
+	emu = hw->synth;
+
+	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];
+			ch = vp->ch;
+			if (ch < 0) {
+				/*
+				dev_warn(emu->card->dev,
+				       "synth_get_voice: ch < 0 (%d) ??", i);
+				*/
+				continue;
+			}
+			vp->emu->num_voices--;
+			vp->ch = -1;
+			vp->state = SNDRV_EMUX_ST_OFF;
+			return ch;
+		}
+	}
+
+	/* not found */
+	return -ENOMEM;
+}
+
+
+/*
+ * turn off the voice (not terminated)
+ */
+static void
+release_voice(struct snd_emux_voice *vp)
+{
+	int dcysusv;
+	struct snd_emu10k1 *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(struct snd_emux_voice *vp)
+{
+	struct snd_emu10k1 *hw;
+	
+	if (snd_BUG_ON(!vp))
+		return;
+	hw = vp->hw;
+	snd_emu10k1_ptr_write(hw, DCYSUSV, vp->ch, 0x807f | DCYSUSV_CHANNELENABLE_MASK);
+	if (vp->block) {
+		struct snd_emu10k1_memblk *emem;
+		emem = (struct snd_emu10k1_memblk *)vp->block;
+		if (emem->map_locked > 0)
+			emem->map_locked--;
+	}
+}
+
+/*
+ * release the voice to system
+ */
+static void
+free_voice(struct snd_emux_voice *vp)
+{
+	struct snd_emu10k1 *hw;
+	
+	hw = vp->hw;
+	/* FIXME: emu10k1_synth is broken. */
+	/* This can get called with hw == 0 */
+	/* Problem apparent on plug, unplug then plug */
+	/* on the Audigy 2 ZS Notebook. */
+	if (hw && (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(struct snd_emux_voice *vp, int update)
+{
+	struct snd_emu10k1 *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(struct snd_emux *emu, struct snd_emu10k1 *hw,
+	      struct best_voice *best, int active_only)
+{
+	struct snd_emux_voice *vp;
+	struct best_voice *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 1
+			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 struct snd_emux_voice *
+get_voice(struct snd_emux *emu, struct snd_emux_port *port)
+{
+	struct snd_emu10k1 *hw;
+	struct snd_emux_voice *vp;
+	struct best_voice 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 */
+				struct snd_emu10k1_voice *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(struct snd_emux_voice *vp)
+{
+	unsigned int temp;
+	int ch;
+	unsigned int addr, mapped_offset;
+	struct snd_midi_channel *chan;
+	struct snd_emu10k1 *hw;
+	struct snd_emu10k1_memblk *emem;
+	
+	hw = vp->hw;
+	ch = vp->ch;
+	if (snd_BUG_ON(ch < 0))
+		return -EINVAL;
+	chan = vp->chan;
+
+	emem = (struct snd_emu10k1_memblk *)vp->block;
+	if (emem == NULL)
+		return -EINVAL;
+	emem->map_locked++;
+	if (snd_emu10k1_memblk_map(hw, emem) < 0) {
+		/* dev_err(hw->card->devK, "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, 0x0000);
+	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 << hw->address_mode) | (hw->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
+	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 << hw_address_mode) | (hw->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
+		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(struct snd_emux_voice *vp)
+{
+	unsigned int temp, ptarget;
+	struct snd_emu10k1 *hw;
+	struct snd_emu10k1_memblk *emem;
+	
+	hw = vp->hw;
+
+	emem = (struct snd_emu10k1_memblk *)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(struct snd_emu10k1 *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;
+	snd_emu10k1_ptr_write(hw, FMMOD, vp->ch, fmmod);
+}
+
+/* set lfo2 pitch & frequency */
+static void
+set_fm2frq2(struct snd_emu10k1 *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;
+	snd_emu10k1_ptr_write(hw, FM2FRQ2, vp->ch, fm2frq2);
+}
+
+/* set filterQ */
+static void
+set_filterQ(struct snd_emu10k1 *hw, struct snd_emux_voice *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);
+}