au88x0_a3d.c

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/***************************************************************************
 *            au88x0_a3d.c
 *
 *  Fri Jul 18 14:16:22 2003
 *  Copyright  2003  mjander
 *  [email protected]
 *
 * 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 absorption. */

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 absorption 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*/