linux/sound/pci/au88x0/au88x0_a3d.c

/***************************************************************************
 *            au88x0_a3d.c
 *
 *  Fri Jul 18 14:16:22 2003
 *  Copyright  2003  mjander
 *  mjander@users.sourceforge.net
 *
 * A3D. You may think i'm crazy, but this may work someday. Who knows...
 ****************************************************************************/

/*
 *  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 Library 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 "au88x0_a3d.h"
#include "au88x0_a3ddata.c"
#include "au88x0_xtalk.h"
#include "au88x0.h"

static void
a3dsrc_SetTimeConsts(a3dsrc_t * a, short HrtfTrack, short ItdTrack,
		     short GTrack, short CTrack)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio,
		a3d_addrA(a->slice, a->source, A3D_A_HrtfTrackTC), HrtfTrack);
	hwwrite(vortex->mmio,
		a3d_addrA(a->slice, a->source, A3D_A_ITDTrackTC), ItdTrack);
	hwwrite(vortex->mmio,
		a3d_addrA(a->slice, a->source, A3D_A_GainTrackTC), GTrack);
	hwwrite(vortex->mmio,
		a3d_addrA(a->slice, a->source, A3D_A_CoeffTrackTC), CTrack);
}

#if 0
static void
a3dsrc_GetTimeConsts(a3dsrc_t * a, short *HrtfTrack, short *ItdTrack,
		     short *GTrack, short *CTrack)
{
	// stub!
}

#endif
/* Atmospheric absorbtion. */

static void
a3dsrc_SetAtmosTarget(a3dsrc_t * a, short aa, short b, short c, short d,
		      short e)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_A21Target),
		(e << 0x10) | d);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_B10Target),
		(b << 0x10) | aa);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_B2Target), c);
}

static void
a3dsrc_SetAtmosCurrent(a3dsrc_t * a, short aa, short b, short c, short d,
		       short e)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_A12Current),
		(e << 0x10) | d);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_B01Current),
		(b << 0x10) | aa);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_B2Current), c);
}

static void
a3dsrc_SetAtmosState(a3dsrc_t * a, short x1, short x2, short y1, short y2)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio, a3d_addrA(a->slice, a->source, A3D_A_x1), x1);
	hwwrite(vortex->mmio, a3d_addrA(a->slice, a->source, A3D_A_x2), x2);
	hwwrite(vortex->mmio, a3d_addrA(a->slice, a->source, A3D_A_y1), y1);
	hwwrite(vortex->mmio, a3d_addrA(a->slice, a->source, A3D_A_y2), y2);
}

#if 0
static void
a3dsrc_GetAtmosTarget(a3dsrc_t * a, short *aa, short *b, short *c,
		      short *d, short *e)
{
}
static void
a3dsrc_GetAtmosCurrent(a3dsrc_t * a, short *bb01, short *ab01, short *b2,
		       short *aa12, short *ba12)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*aa12 =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_A12Current));
	*ba12 =
	    hwread(vortex->mmio,
		   a3d_addrB(a->slice, a->source, A3D_B_A12Current));
	*ab01 =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_B01Current));
	*bb01 =
	    hwread(vortex->mmio,
		   a3d_addrB(a->slice, a->source, A3D_B_B01Current));
	*b2 =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_B2Current));
}

static void
a3dsrc_GetAtmosState(a3dsrc_t * a, short *x1, short *x2, short *y1, short *y2)
{

}

#endif
/* HRTF */

static void
a3dsrc_SetHrtfTarget(a3dsrc_t * a, a3d_Hrtf_t const aa, a3d_Hrtf_t const b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < HRTF_SZ; i++)
		hwwrite(vortex->mmio,
			a3d_addrB(a->slice, a->source,
				  A3D_B_HrtfTarget) + (i << 2),
			(b[i] << 0x10) | aa[i]);
}

static void
a3dsrc_SetHrtfCurrent(a3dsrc_t * a, a3d_Hrtf_t const aa, a3d_Hrtf_t const b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < HRTF_SZ; i++)
		hwwrite(vortex->mmio,
			a3d_addrB(a->slice, a->source,
				  A3D_B_HrtfCurrent) + (i << 2),
			(b[i] << 0x10) | aa[i]);
}

static void
a3dsrc_SetHrtfState(a3dsrc_t * a, a3d_Hrtf_t const aa, a3d_Hrtf_t const b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < HRTF_SZ; i++)
		hwwrite(vortex->mmio,
			a3d_addrB(a->slice, a->source,
				  A3D_B_HrtfDelayLine) + (i << 2),
			(b[i] << 0x10) | aa[i]);
}

static void a3dsrc_SetHrtfOutput(a3dsrc_t * a, short left, short right)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio,
		a3d_addrA(a->slice, a->source, A3D_A_HrtfOutL), left);
	hwwrite(vortex->mmio,
		a3d_addrA(a->slice, a->source, A3D_A_HrtfOutR), right);
}

#if 0
static void a3dsrc_GetHrtfTarget(a3dsrc_t * a, a3d_Hrtf_t aa, a3d_Hrtf_t b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < HRTF_SZ; i++)
		aa[i] =
		    hwread(vortex->mmio,
			   a3d_addrA(a->slice, a->source,
				     A3D_A_HrtfTarget + (i << 2)));
	for (i = 0; i < HRTF_SZ; i++)
		b[i] =
		    hwread(vortex->mmio,
			   a3d_addrB(a->slice, a->source,
				     A3D_B_HrtfTarget + (i << 2)));
}

static void a3dsrc_GetHrtfCurrent(a3dsrc_t * a, a3d_Hrtf_t aa, a3d_Hrtf_t b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < HRTF_SZ; i++)
		aa[i] =
		    hwread(vortex->mmio,
			   a3d_addrA(a->slice, a->source,
				     A3D_A_HrtfCurrent + (i << 2)));
	for (i = 0; i < HRTF_SZ; i++)
		b[i] =
		    hwread(vortex->mmio,
			   a3d_addrB(a->slice, a->source,
				     A3D_B_HrtfCurrent + (i << 2)));
}

static void a3dsrc_GetHrtfState(a3dsrc_t * a, a3d_Hrtf_t aa, a3d_Hrtf_t b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;
	// FIXME: verify this!
	for (i = 0; i < HRTF_SZ; i++)
		aa[i] =
		    hwread(vortex->mmio,
			   a3d_addrA(a->slice, a->source,
				     A3D_A_HrtfDelayLine + (i << 2)));
	for (i = 0; i < HRTF_SZ; i++)
		b[i] =
		    hwread(vortex->mmio,
			   a3d_addrB(a->slice, a->source,
				     A3D_B_HrtfDelayLine + (i << 2)));
}

static void a3dsrc_GetHrtfOutput(a3dsrc_t * a, short *left, short *right)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*left =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_HrtfOutL));
	*right =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_HrtfOutR));
}

#endif

/* Interaural Time Difference. 
 * "The other main clue that humans use to locate sounds, is called 
 * Interaural Time Difference (ITD). The differences in distance from 
 * the sound source to a listeners ears means  that the sound will 
 * reach one ear slightly before the other....", found somewhere with google.*/
static void a3dsrc_SetItdTarget(a3dsrc_t * a, short litd, short ritd)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);

	if (litd < 0)
		litd = 0;
	if (litd > 0x57FF)
		litd = 0x57FF;
	if (ritd < 0)
		ritd = 0;
	if (ritd > 0x57FF)
		ritd = 0x57FF;
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_ITDTarget),
		(ritd << 0x10) | litd);
	//hwwrite(vortex->mmio, addr(0x191DF+5, this04, this08), (ritd<<0x10)|litd);
}

static void a3dsrc_SetItdCurrent(a3dsrc_t * a, short litd, short ritd)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);

	if (litd < 0)
		litd = 0;
	if (litd > 0x57FF)
		litd = 0x57FF;
	if (ritd < 0)
		ritd = 0;
	if (ritd > 0x57FF)
		ritd = 0x57FF;
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_ITDCurrent),
		(ritd << 0x10) | litd);
	//hwwrite(vortex->mmio, addr(0x191DF+1, this04, this08), (ritd<<0x10)|litd);
}

static void a3dsrc_SetItdDline(a3dsrc_t * a, a3d_ItdDline_t const dline)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;
	/* 45 != 40 -> Check this ! */
	for (i = 0; i < DLINE_SZ; i++)
		hwwrite(vortex->mmio,
			a3d_addrA(a->slice, a->source,
				  A3D_A_ITDDelayLine) + (i << 2), dline[i]);
}

#if 0
static void a3dsrc_GetItdTarget(a3dsrc_t * a, short *litd, short *ritd)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*ritd =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_ITDTarget));
	*litd =
	    hwread(vortex->mmio,
		   a3d_addrB(a->slice, a->source, A3D_B_ITDTarget));
}

static void a3dsrc_GetItdCurrent(a3dsrc_t * a, short *litd, short *ritd)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);

	*ritd =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_ITDCurrent));
	*litd =
	    hwread(vortex->mmio,
		   a3d_addrB(a->slice, a->source, A3D_B_ITDCurrent));
}

static void a3dsrc_GetItdDline(a3dsrc_t * a, a3d_ItdDline_t dline)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < DLINE_SZ; i++)
		dline[i] =
		    hwread(vortex->mmio,
			   a3d_addrA(a->slice, a->source,
				     A3D_A_ITDDelayLine + (i << 2)));
}

#endif
/* This is may be used for ILD Interaural Level Difference. */

static void a3dsrc_SetGainTarget(a3dsrc_t * a, short left, short right)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_GainTarget),
		(right << 0x10) | left);
}

static void a3dsrc_SetGainCurrent(a3dsrc_t * a, short left, short right)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio,
		a3d_addrB(a->slice, a->source, A3D_B_GainCurrent),
		(right << 0x10) | left);
}

#if 0
static void a3dsrc_GetGainTarget(a3dsrc_t * a, short *left, short *right)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*right =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_GainTarget));
	*left =
	    hwread(vortex->mmio,
		   a3d_addrB(a->slice, a->source, A3D_B_GainTarget));
}

static void a3dsrc_GetGainCurrent(a3dsrc_t * a, short *left, short *right)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*right =
	    hwread(vortex->mmio,
		   a3d_addrA(a->slice, a->source, A3D_A_GainCurrent));
	*left =
	    hwread(vortex->mmio,
		   a3d_addrB(a->slice, a->source, A3D_B_GainCurrent));
}

/* CA3dIO this func seems to be inlined all over this place. */
static void CA3dIO_WriteReg(a3dsrc_t * a, unsigned long addr, short aa, short b)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio, addr, (aa << 0x10) | b);
}

#endif
/* Generic A3D stuff */

static void a3dsrc_SetA3DSampleRate(a3dsrc_t * a, int sr)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int esp0 = 0;

	esp0 = (((esp0 & 0x7fffffff) | 0xB8000000) & 0x7) | ((sr & 0x1f) << 3);
	hwwrite(vortex->mmio, A3D_SLICE_Control + ((a->slice) << 0xd), esp0);
	//hwwrite(vortex->mmio, 0x19C38 + (this08<<0xd), esp0);
}

static void a3dsrc_EnableA3D(a3dsrc_t * a)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio, A3D_SLICE_Control + ((a->slice) << 0xd),
		0xF0000001);
	//hwwrite(vortex->mmio, 0x19C38 + (this08<<0xd), 0xF0000001);
}

static void a3dsrc_DisableA3D(a3dsrc_t * a)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio, A3D_SLICE_Control + ((a->slice) << 0xd),
		0xF0000000);
}

static void a3dsrc_SetA3DControlReg(a3dsrc_t * a, unsigned long ctrl)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio, A3D_SLICE_Control + ((a->slice) << 0xd), ctrl);
}

static void a3dsrc_SetA3DPointerReg(a3dsrc_t * a, unsigned long ptr)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	hwwrite(vortex->mmio, A3D_SLICE_Pointers + ((a->slice) << 0xd), ptr);
}

#if 0
static void a3dsrc_GetA3DSampleRate(a3dsrc_t * a, int *sr)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*sr = ((hwread(vortex->mmio, A3D_SLICE_Control + (a->slice << 0xd))
		>> 3) & 0x1f);
	//*sr = ((hwread(vortex->mmio, 0x19C38 + (this08<<0xd))>>3)&0x1f);
}

static void a3dsrc_GetA3DControlReg(a3dsrc_t * a, unsigned long *ctrl)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*ctrl = hwread(vortex->mmio, A3D_SLICE_Control + ((a->slice) << 0xd));
}

static void a3dsrc_GetA3DPointerReg(a3dsrc_t * a, unsigned long *ptr)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	*ptr = hwread(vortex->mmio, A3D_SLICE_Pointers + ((a->slice) << 0xd));
}

#endif
static void a3dsrc_ZeroSliceIO(a3dsrc_t * a)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);
	int i;

	for (i = 0; i < 8; i++)
		hwwrite(vortex->mmio,
			A3D_SLICE_VDBDest +
			((((a->slice) << 0xb) + i) << 2), 0);
	for (i = 0; i < 4; i++)
		hwwrite(vortex->mmio,
			A3D_SLICE_VDBSource +
			((((a->slice) << 0xb) + i) << 2), 0);
}

/* Reset Single A3D source. */
static void a3dsrc_ZeroState(a3dsrc_t * a)
{
	/*
	printk(KERN_DEBUG "vortex: ZeroState slice: %d, source %d\n",
	       a->slice, a->source);
	*/
	a3dsrc_SetAtmosState(a, 0, 0, 0, 0);
	a3dsrc_SetHrtfState(a, A3dHrirZeros, A3dHrirZeros);
	a3dsrc_SetItdDline(a, A3dItdDlineZeros);
	a3dsrc_SetHrtfOutput(a, 0, 0);
	a3dsrc_SetTimeConsts(a, 0, 0, 0, 0);

	a3dsrc_SetAtmosCurrent(a, 0, 0, 0, 0, 0);
	a3dsrc_SetAtmosTarget(a, 0, 0, 0, 0, 0);
	a3dsrc_SetItdCurrent(a, 0, 0);
	a3dsrc_SetItdTarget(a, 0, 0);
	a3dsrc_SetGainCurrent(a, 0, 0);
	a3dsrc_SetGainTarget(a, 0, 0);

	a3dsrc_SetHrtfCurrent(a, A3dHrirZeros, A3dHrirZeros);
	a3dsrc_SetHrtfTarget(a, A3dHrirZeros, A3dHrirZeros);
}

/* Reset entire A3D engine */
static void a3dsrc_ZeroStateA3D(a3dsrc_t * a)
{
	int i, var, var2;

	if ((a->vortex) == NULL) {
		printk(KERN_ERR "vortex: ZeroStateA3D: ERROR: a->vortex is NULL\n");
		return;
	}

	a3dsrc_SetA3DControlReg(a, 0);
	a3dsrc_SetA3DPointerReg(a, 0);

	var = a->slice;
	var2 = a->source;
	for (i = 0; i < 4; i++) {
		a->slice = i;
		a3dsrc_ZeroSliceIO(a);
		//a3dsrc_ZeroState(a);
	}
	a->source = var2;
	a->slice = var;
}

/* Program A3D block as pass through */
static void a3dsrc_ProgramPipe(a3dsrc_t * a)
{
	a3dsrc_SetTimeConsts(a, 0, 0, 0, 0);
	a3dsrc_SetAtmosCurrent(a, 0, 0x4000, 0, 0, 0);
	a3dsrc_SetAtmosTarget(a, 0x4000, 0, 0, 0, 0);
	a3dsrc_SetItdCurrent(a, 0, 0);
	a3dsrc_SetItdTarget(a, 0, 0);
	a3dsrc_SetGainCurrent(a, 0x7fff, 0x7fff);
	a3dsrc_SetGainTarget(a, 0x7fff, 0x7fff);

	/* SET HRTF HERE */

	/* Single spike leads to identity transfer function. */
	a3dsrc_SetHrtfCurrent(a, A3dHrirImpulse, A3dHrirImpulse);
	a3dsrc_SetHrtfTarget(a, A3dHrirImpulse, A3dHrirImpulse);

	/* Test: Sounds saturated. */
	//a3dsrc_SetHrtfCurrent(a, A3dHrirSatTest, A3dHrirSatTest);
	//a3dsrc_SetHrtfTarget(a, A3dHrirSatTest, A3dHrirSatTest);      
}

/* VDB = Vortex audio Dataflow Bus */
#if 0
static void a3dsrc_ClearVDBData(a3dsrc_t * a, unsigned long aa)
{
	vortex_t *vortex = (vortex_t *) (a->vortex);

	// ((aa >> 2) << 8) - (aa >> 2)
	hwwrite(vortex->mmio,
		a3d_addrS(a->slice, A3D_SLICE_VDBDest) + (a->source << 2), 0);
	hwwrite(vortex->mmio,
		a3d_addrS(a->slice,
			  A3D_SLICE_VDBDest + 4) + (a->source << 2), 0);
	/*
	   hwwrite(vortex->mmio, 0x19c00 + (((aa>>2)*255*4)+aa)*8, 0);
	   hwwrite(vortex->mmio, 0x19c04 + (((aa>>2)*255*4)+aa)*8, 0);
	 */
}
#endif

/* A3D HwSource stuff. */

static void vortex_A3dSourceHw_Initialize(vortex_t * v, int source, int slice)
{
	a3dsrc_t *a3dsrc = &(v->a3d[source + (slice * 4)]);
	//a3dsrc_t *a3dsrc = &(v->a3d[source + (slice*4)]);

	a3dsrc->vortex = (void *)v;
	a3dsrc->source = source;	/* source */
	a3dsrc->slice = slice;	/* slice */
	a3dsrc_ZeroState(a3dsrc);
	/* Added by me. */
	a3dsrc_SetA3DSampleRate(a3dsrc, 0x11);
}

static int Vort3DRend_Initialize(vortex_t * v, unsigned short mode)
{
	v->xt_mode = mode;	/* this_14 */

	vortex_XtalkHw_init(v);
	vortex_XtalkHw_SetGainsAllChan(v);
	switch (v->xt_mode) {
	case XT_SPEAKER0:
		vortex_XtalkHw_ProgramXtalkNarrow(v);
		break;
	case XT_SPEAKER1:
		vortex_XtalkHw_ProgramXtalkWide(v);
		break;
	default:
	case XT_HEADPHONE:
		vortex_XtalkHw_ProgramPipe(v);
		break;
	case XT_DIAMOND:
		vortex_XtalkHw_ProgramDiamondXtalk(v);
		break;
	}
	vortex_XtalkHw_SetSampleRate(v, 0x11);
	vortex_XtalkHw_Enable(v);
	return 0;
}

/* 3D Sound entry points. */

static int vortex_a3d_register_controls(vortex_t * vortex);
static void vortex_a3d_unregister_controls(vortex_t * vortex);
/* A3D base support init/shudown */
static void __devinit vortex_Vort3D_enable(vortex_t * v)
{
	int i;

	Vort3DRend_Initialize(v, XT_HEADPHONE);
	for (i = 0; i < NR_A3D; i++) {
		vortex_A3dSourceHw_Initialize(v, i % 4, i >> 2);
		a3dsrc_ZeroStateA3D(&(v->a3d[0]));
	}
	/* Register ALSA controls */
	vortex_a3d_register_controls(v);
}

static void vortex_Vort3D_disable(vortex_t * v)
{
	vortex_XtalkHw_Disable(v);
	vortex_a3d_unregister_controls(v);
}

/* Make A3D subsystem connections. */
static void vortex_Vort3D_connect(vortex_t * v, int en)
{
	int i;
	
// Disable AU8810 routes, since they seem to be wrong (in au8810.h).
#ifdef CHIP_AU8810
	return;
#endif
	
#if 1
	/* Alloc Xtalk mixin resources */
	v->mixxtlk[0] =
	    vortex_adb_checkinout(v, v->fixed_res, en, VORTEX_RESOURCE_MIXIN);
	if (v->mixxtlk[0] < 0) {
		printk
		    ("vortex: vortex_Vort3D: ERROR: not enough free mixer resources.\n");
		return;
	}
	v->mixxtlk[1] =
	    vortex_adb_checkinout(v, v->fixed_res, en, VORTEX_RESOURCE_MIXIN);
	if (v->mixxtlk[1] < 0) {
		printk
		    ("vortex: vortex_Vort3D: ERROR: not enough free mixer resources.\n");
		return;
	}
#endif

	/* Connect A3D -> XTALK */
	for (i = 0; i < 4; i++) {
		// 2 outputs per each A3D slice. 
		vortex_route(v, en, 0x11, ADB_A3DOUT(i * 2), ADB_XTALKIN(i));
		vortex_route(v, en, 0x11, ADB_A3DOUT(i * 2) + 1, ADB_XTALKIN(5 + i));
	}
#if 0
	vortex_route(v, en, 0x11, ADB_XTALKOUT(0), ADB_EQIN(2));
	vortex_route(v, en, 0x11, ADB_XTALKOUT(1), ADB_EQIN(3));
#else
	/* Connect XTalk -> mixer */
	vortex_route(v, en, 0x11, ADB_XTALKOUT(0), ADB_MIXIN(v->mixxtlk[0]));
	vortex_route(v, en, 0x11, ADB_XTALKOUT(1), ADB_MIXIN(v->mixxtlk[1]));
	vortex_connection_mixin_mix(v, en, v->mixxtlk[0], v->mixplayb[0], 0);
	vortex_connection_mixin_mix(v, en, v->mixxtlk[1], v->mixplayb[1], 0);
	vortex_mix_setinputvolumebyte(v, v->mixplayb[0], v->mixxtlk[0],
				      en ? MIX_DEFIGAIN : VOL_MIN);
	vortex_mix_setinputvolumebyte(v, v->mixplayb[1], v->mixxtlk[1],
				      en ? MIX_DEFIGAIN : VOL_MIN);
	if (VORTEX_IS_QUAD(v)) {
		vortex_connection_mixin_mix(v, en, v->mixxtlk[0],
					    v->mixplayb[2], 0);
		vortex_connection_mixin_mix(v, en, v->mixxtlk[1],
					    v->mixplayb[3], 0);
		vortex_mix_setinputvolumebyte(v, v->mixplayb[2],
					      v->mixxtlk[0],
					      en ? MIX_DEFIGAIN : VOL_MIN);
		vortex_mix_setinputvolumebyte(v, v->mixplayb[3],
					      v->mixxtlk[1],
					      en ? MIX_DEFIGAIN : VOL_MIN);
	}
#endif
}

/* Initialize one single A3D source. */
static void vortex_Vort3D_InitializeSource(a3dsrc_t * a, int en)
{
	if (a->vortex == NULL) {
		printk
		    ("vortex: Vort3D_InitializeSource: A3D source not initialized\n");
		return;
	}
	if (en) {
		a3dsrc_ProgramPipe(a);
		a3dsrc_SetA3DSampleRate(a, 0x11);
		a3dsrc_SetTimeConsts(a, HrtfTCDefault,
				     ItdTCDefault, GainTCDefault,
				     CoefTCDefault);
		/* Remark: zero gain is muted. */
		//a3dsrc_SetGainTarget(a,0,0);
		//a3dsrc_SetGainCurrent(a,0,0);
		a3dsrc_EnableA3D(a);
	} else {
		a3dsrc_DisableA3D(a);
		a3dsrc_ZeroState(a);
	}
}

/* Conversion of coordinates into 3D parameters. */

static void vortex_a3d_coord2hrtf(a3d_Hrtf_t hrtf, int *coord)
{
	/* FIXME: implement this. */

}
static void vortex_a3d_coord2itd(a3d_Itd_t itd, int *coord)
{
	/* FIXME: implement this. */

}
static void vortex_a3d_coord2ild(a3d_LRGains_t ild, int left, int right)
{
	/* FIXME: implement this. */

}
static void vortex_a3d_translate_filter(a3d_atmos_t filter, int *params)
{
	/* FIXME: implement this. */

}

/* ALSA control interface.  */

static int
snd_vortex_a3d_hrtf_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 6;
	uinfo->value.integer.min = 0x00000000;
	uinfo->value.integer.max = 0xffffffff;
	return 0;
}
static int
snd_vortex_a3d_itd_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0x00000000;
	uinfo->value.integer.max = 0xffffffff;
	return 0;
}
static int
snd_vortex_a3d_ild_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0x00000000;
	uinfo->value.integer.max = 0xffffffff;
	return 0;
}
static int
snd_vortex_a3d_filter_info(struct snd_kcontrol *kcontrol,
			   struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 4;
	uinfo->value.integer.min = 0x00000000;
	uinfo->value.integer.max = 0xffffffff;
	return 0;
}

static int
snd_vortex_a3d_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	//a3dsrc_t *a = kcontrol->private_data;
	/* No read yet. Would this be really useable/needed ? */

	return 0;
}

static int
snd_vortex_a3d_hrtf_put(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	a3dsrc_t *a = kcontrol->private_data;
	int changed = 1, i;
	int coord[6];
	for (i = 0; i < 6; i++)
		coord[i] = ucontrol->value.integer.value[i];
	/* Translate orientation coordinates to a3d params. */
	vortex_a3d_coord2hrtf(a->hrtf[0], coord);
	vortex_a3d_coord2hrtf(a->hrtf[1], coord);
	a3dsrc_SetHrtfTarget(a, a->hrtf[0], a->hrtf[1]);
	a3dsrc_SetHrtfCurrent(a, a->hrtf[0], a->hrtf[1]);
	return changed;
}

static int
snd_vortex_a3d_itd_put(struct snd_kcontrol *kcontrol,
		       struct snd_ctl_elem_value *ucontrol)
{
	a3dsrc_t *a = kcontrol->private_data;
	int coord[6];
	int i, changed = 1;
	for (i = 0; i < 6; i++)
		coord[i] = ucontrol->value.integer.value[i];
	/* Translate orientation coordinates to a3d params. */
	vortex_a3d_coord2itd(a->hrtf[0], coord);
	vortex_a3d_coord2itd(a->hrtf[1], coord);
	/* Inter aural time difference. */
	a3dsrc_SetItdTarget(a, a->itd[0], a->itd[1]);
	a3dsrc_SetItdCurrent(a, a->itd[0], a->itd[1]);
	a3dsrc_SetItdDline(a, a->dline);
	return changed;
}

static int
snd_vortex_a3d_ild_put(struct snd_kcontrol *kcontrol,
		       struct snd_ctl_elem_value *ucontrol)
{
	a3dsrc_t *a = kcontrol->private_data;
	int changed = 1;
	int l, r;
	/* There may be some scale tranlation needed here. */
	l = ucontrol->value.integer.value[0];
	r = ucontrol->value.integer.value[1];
	vortex_a3d_coord2ild(a->ild, l, r);
	/* Left Right panning. */
	a3dsrc_SetGainTarget(a, l, r);
	a3dsrc_SetGainCurrent(a, l, r);
	return changed;
}

static int
snd_vortex_a3d_filter_put(struct snd_kcontrol *kcontrol,
			  struct snd_ctl_elem_value *ucontrol)
{
	a3dsrc_t *a = kcontrol->private_data;
	int i, changed = 1;
	int params[6];
	for (i = 0; i < 6; i++)
		params[i] = ucontrol->value.integer.value[i];
	/* Translate generic filter params to a3d filter params. */
	vortex_a3d_translate_filter(a->filter, params);
	/* Atmospheric absorbtion and filtering. */
	a3dsrc_SetAtmosTarget(a, a->filter[0],
			      a->filter[1], a->filter[2],
			      a->filter[3], a->filter[4]);
	a3dsrc_SetAtmosCurrent(a, a->filter[0],
			       a->filter[1], a->filter[2],
			       a->filter[3], a->filter[4]);
	return changed;
}

static struct snd_kcontrol_new vortex_a3d_kcontrol __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.name = "Playback PCM advanced processing",
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.info = snd_vortex_a3d_hrtf_info,
	.get = snd_vortex_a3d_get,
	.put = snd_vortex_a3d_hrtf_put,
};

/* Control (un)registration. */
static int __devinit vortex_a3d_register_controls(vortex_t * vortex)
{
	struct snd_kcontrol *kcontrol;
	int err, i;
	/* HRTF controls. */
	for (i = 0; i < NR_A3D; i++) {
		if ((kcontrol =
		     snd_ctl_new1(&vortex_a3d_kcontrol, &vortex->a3d[i])) == NULL)
			return -ENOMEM;
		kcontrol->id.numid = CTRLID_HRTF;
		kcontrol->info = snd_vortex_a3d_hrtf_info;
		kcontrol->put = snd_vortex_a3d_hrtf_put;
		if ((err = snd_ctl_add(vortex->card, kcontrol)) < 0)
			return err;
	}
	/* ITD controls. */
	for (i = 0; i < NR_A3D; i++) {
		if ((kcontrol =
		     snd_ctl_new1(&vortex_a3d_kcontrol, &vortex->a3d[i])) == NULL)
			return -ENOMEM;
		kcontrol->id.numid = CTRLID_ITD;
		kcontrol->info = snd_vortex_a3d_itd_info;
		kcontrol->put = snd_vortex_a3d_itd_put;
		if ((err = snd_ctl_add(vortex->card, kcontrol)) < 0)
			return err;
	}
	/* ILD (gains) controls. */
	for (i = 0; i < NR_A3D; i++) {
		if ((kcontrol =
		     snd_ctl_new1(&vortex_a3d_kcontrol, &vortex->a3d[i])) == NULL)
			return -ENOMEM;
		kcontrol->id.numid = CTRLID_GAINS;
		kcontrol->info = snd_vortex_a3d_ild_info;
		kcontrol->put = snd_vortex_a3d_ild_put;
		if ((err = snd_ctl_add(vortex->card, kcontrol)) < 0)
			return err;
	}
	/* Filter controls. */
	for (i = 0; i < NR_A3D; i++) {
		if ((kcontrol =
		     snd_ctl_new1(&vortex_a3d_kcontrol, &vortex->a3d[i])) == NULL)
			return -ENOMEM;
		kcontrol->id.numid = CTRLID_FILTER;
		kcontrol->info = snd_vortex_a3d_filter_info;
		kcontrol->put = snd_vortex_a3d_filter_put;
		if ((err = snd_ctl_add(vortex->card, kcontrol)) < 0)
			return err;
	}
	return 0;
}

static void vortex_a3d_unregister_controls(vortex_t * vortex)
{

}

/* End of File*/