tda9851.c

用于TM1300/PNX1300系列DSP（主要用于视频处理）的设备库的源码

/*
 *  Copyright (c) 1999 by TriMedia Technologies. 
 *
 *  +-------------------------------------------------------------------+
 *  | This software  is furnished under a license  and may only be used |
 *  | and copied in accordance with the terms  and conditions of such a |
 *  | license  and with  the inclusion of this  copyright notice.  This |
 *  | software or any other copies of this software may not be provided |
 *  | or otherwise  made available  to any other person.  The ownership |
 *  | and title of this software is not transferred.                    |
 *  |                                                                   |
 *  | The information  in this software  is subject  to change  without |
 *  | any  prior notice  and should not be construed as a commitment by |
 *  | TriMedia Technologies.                                            |
 *  |                                                                   |
 *  | This  code  and  information  is  provided  "as is"  without  any |
 *  | warranty of any kind,  either expressed or implied, including but |
 *  | not limited  to the implied warranties  of merchantability and/or |
 *  | fitness for any particular purpose.                               |
 *  +-------------------------------------------------------------------+
 *
 *
 *  Module name              : tda9851.c  1.2
 *
 *  Last update              : 18:43:50  -  00/11/09
 *
 *  Description              :
 *
 */

#include <ops/custom_defs.h>
#include <tmlib/tmtypes.h>
#include <tm1/tmBoardDef.h>
#include <tm1/tsaTvAudDem.h>
#include <tm1/tmIIC.h>
#include <tm1/tmBoard.h>
#include <tm1/tmAvFormats.h>
#include <tm1/tmAssert.h>
#include <tmlib/dprintf.h>    /* for debugging with DP(()) */
#include <tm1/tmLibdevErr.h>

#include "tda9851.h"
#include "iicDirection.h"

#define TDA9851_DEFAULT_IIC_REG 0x03 /* mute on, stereo enabled */

typedef struct
{
    Bool            used;
    unitSelect_t    id;
    UInt            iicDirection;
    UInt8           iicReg;
}tda9851UnitVars_t, *ptda9851UnitVars_t;

static tda9851UnitVars_t unitVars0 = {False, unit0, 0, TDA9851_DEFAULT_IIC_REG};
static tda9851UnitVars_t unitVars1 = {False, unit1, 0, TDA9851_DEFAULT_IIC_REG};

extern tmLibdevErr_t tda9851Init(unitSelect_t unitID, ptda9851Param_t params)
{
    ptda9851UnitVars_t  uv;
    tmLibdevErr_t       err = TMLIBDEV_OK;
    Int                 i;

    if (unitVars0.used)
    {
        if (unitVars1.used)
            return -1;
        else
            uv = &unitVars1;
    }
    else
        uv = &unitVars0;

    uv->id   = unitID;
    uv->used = True;

    /* initialize unit variables */
    uv->iicDirection = params->iicDirection;

    err = iicDirectionSelect(uv->iicDirection);
    if (err != TMLIBDEV_OK)
        return err;

    /* setup for the audio demodulator */
    uv->iicReg = TDA9851_DEFAULT_IIC_REG;
    err = iicWriteReg(TDA9851_IIC_ADDRESS, -1, uv->iicReg);
    if (err != TMLIBDEV_OK)
        goto tda9851InitExit;

tda9851InitExit:

    iicDirectionUnSelect(uv->iicDirection);
    return err;
}

extern tmLibdevErr_t tda9851Term(unitSelect_t unitID)
{
    ptda9851UnitVars_t  uv;

    if (unitID == unitVars0.id)
        uv = &unitVars0;
    else
        uv = &unitVars1;

    uv->used = False;

    return TMLIBDEV_OK;
}

extern tmLibdevErr_t tda9851Start(unitSelect_t unitID)
{
    ptda9851UnitVars_t  uv;
    UInt                iicd;
    tmLibdevErr_t       err;

    if (unitID == unitVars0.id)
        uv = &unitVars0;
    else
        uv = &unitVars1;

    err = iicDirectionSelect(uv->iicDirection);
    if (err != TMLIBDEV_OK)
        return err;

    iicd = uv->iicReg & 0xfd;
    err = iicWriteReg(TDA9851_IIC_ADDRESS, -1, iicd);

    if (err == TMLIBDEV_OK)
        uv->iicReg = iicd;

    iicDirectionUnSelect(uv->iicDirection);
    return err;
}

extern tmLibdevErr_t tda9851Stop(unitSelect_t unitID)
{
    ptda9851UnitVars_t  uv;
    UInt                iicd;
    tmLibdevErr_t       err;

    if (unitID == unitVars0.id)
        uv = &unitVars0;
    else
        uv = &unitVars1;

    err = iicDirectionSelect(uv->iicDirection);
    if (err != TMLIBDEV_OK)
        return err;

    iicd = uv->iicReg | 0x02;
    err = iicWriteReg(TDA9851_IIC_ADDRESS, -1, iicd);

    if (err == TMLIBDEV_OK)
        uv->iicReg = iicd;

    iicDirectionUnSelect(uv->iicDirection);
    return err;
}

extern tmLibdevErr_t tda9851MuteStereo(unitSelect_t unitID)
{
    return TMLIBDEV_OK;
}

extern tmLibdevErr_t tda9851SetStereo(unitSelect_t unitID, Bool enable)
{
    ptda9851UnitVars_t  uv;
    UInt                iicd;
    tmLibdevErr_t       err;

    if (unitID == unitVars0.id)
        uv = &unitVars0;
    else
        uv = &unitVars1;

    err = iicDirectionSelect(uv->iicDirection);
    if (err != TMLIBDEV_OK)
        return err;

    iicd = uv->iicReg & 0xfe;
    if (enable)
        iicd |= 0x01;
    err = iicWriteReg(TDA9851_IIC_ADDRESS, -1, iicd);

    if (err == TMLIBDEV_OK)
        uv->iicReg = iicd;

    iicDirectionUnSelect(uv->iicDirection);
    return err;
}

extern tmLibdevErr_t tda9851GetStatus(unitSelect_t unitID, ptsaTvAudDemStatus_t status)
{
    ptda9851UnitVars_t  uv;
    UInt                iicd;
    tmLibdevErr_t       err = TMLIBDEV_OK;

    status->stereoPresent = False;
    status->sapPresent    = False;

    if (unitID == unitVars0.id)
        uv = &unitVars0;
    else
        uv = &unitVars1;

    err = iicDirectionSelect(uv->iicDirection);
    if (err != TMLIBDEV_OK)
        return err;

    err = iicReadReg(TDA9851_IIC_ADDRESS, -1, &iicd);
    if (err != TMLIBDEV_OK)
        goto tda9851GetStatusExit;

    if (iicd & 0x01)
        status->stereoPresent = True;

tda9851GetStatusExit:

    iicDirectionUnSelect(uv->iicDirection);
    return err;
}