/*
 * $Id: DTT7600Tuner.c,v 1.1 2011/07/08 03:43:59 megakiss Exp $
 * $Revision: 1.1 $
 * $DateTime: 2005/08/24 19:03:17 $
 * $Change: 28028 $
 * $Author: megakiss $
 */

#include "DTT7600Tuner.h"
#include "IicComm.h"

BOOLEAN TunerDTT760xATSCBeforeSendBytes(void);
BOOLEAN TunerDTT760xATSCAfterSendBytes(void);

int TunerDTT760xATSCSendChannel(unsigned int uiChannel, CHANNEL_TABLE_TYPE iChannelTable, TYPE_TUNERDTT760xATSC_REF_DIVIDER_RATIO iRefDividerRatio,unsigned int uiAgc, BOOLEAN bUseExternalAgc,unsigned int uiChargePump,unsigned int uiAgcTimeConstant)
{
	unsigned long ulFrequency;

	unsigned char Db1;
	unsigned char Db2;
	unsigned char Cb;
	unsigned char Bb;
	unsigned char Ab;
	unsigned char Cb2;
	
	TunerDTT760xATSCInitsendBytes(&Db1, &Db2, &Cb ,&Bb, &Ab,&Cb2);

	ulFrequency = TunerDTT760xATSCGetFrequency(uiChannel, iChannelTable);
	if(0 == ulFrequency)
		return TUNER_DTT760xATSC_CHANNEL_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetRFFreq(ulFrequency,bUseExternalAgc,&Bb))
		return TUNER_DTT760xATSC_FREQUENCY_VALUE_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetN( ulFrequency,iRefDividerRatio,&Db1,&Db2))
		return TUNER_DTT760xATSC_N_VALU_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetCP(uiChargePump,&Cb))
		return TUNER_DTT760xATSC_CHARGE_PUMP_VALUE_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetStepSize(iRefDividerRatio,&Cb,&Cb2)) 
		return TUNER_DTT760xATSC_STEP_SIZE_VALUE_OUT_OF_RANGE;
	
	if(!TunerDTT760xATSCSetAGC(uiAgc,&Ab))
		return TUNER_DTT760xATSC_AGC_VALUE_OUT_OF_RANGE;
	
	if(!TunerDTT760xATSCSetATC(uiAgcTimeConstant,&Ab))
		return TUNER_DTT760xATSC_ATC_VALUE_OUT_OF_RANGE;
	
	return TunerDTT760xATSCSendControlData(Db1, Db2, Cb, Bb, Ab,Cb2);
}

int TunerDTT760xATSCSendFreq(unsigned long ulFrequency,TYPE_TUNERDTT760xATSC_REF_DIVIDER_RATIO iRefDividerRatio,unsigned int uiAgc, BOOLEAN bUseExternalAgc,unsigned int uiChargePump,unsigned int uiAgcTimeConstant) 
{
	unsigned char Db1;
	unsigned char Db2;
	unsigned char Cb;
	unsigned char Bb;
	unsigned char Ab;
	unsigned char Cb2;
	
	TunerDTT760xATSCInitsendBytes(&Db1, &Db2, &Cb ,&Bb, &Ab,&Cb2);

	if(!TunerDTT760xATSCSetRFFreq(ulFrequency,bUseExternalAgc,&Bb))
		return TUNER_DTT760xATSC_FREQUENCY_VALUE_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetN( ulFrequency,iRefDividerRatio,&Db1,&Db2))
		return TUNER_DTT760xATSC_N_VALU_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetCP(uiChargePump,&Cb))
		return TUNER_DTT760xATSC_CHARGE_PUMP_VALUE_OUT_OF_RANGE;

	if(!TunerDTT760xATSCSetStepSize(iRefDividerRatio,&Cb,&Cb2)) 
		return TUNER_DTT760xATSC_STEP_SIZE_VALUE_OUT_OF_RANGE;
	
	if(!TunerDTT760xATSCSetAGC(uiAgc,&Ab))
		return TUNER_DTT760xATSC_AGC_VALUE_OUT_OF_RANGE;
	
	if(!TunerDTT760xATSCSetATC(uiAgcTimeConstant,&Ab))
		return TUNER_DTT760xATSC_ATC_VALUE_OUT_OF_RANGE;
	
	return TunerDTT760xATSCSendControlData( Db1,  Db2,  Cb , Bb,  Ab,Cb2);
}

int TunerDTT760xATSCSendPicCarrier(unsigned long ulFrequency,TYPE_TUNERDTT760xATSC_REF_DIVIDER_RATIO iRefDividerRatio,unsigned int uiAgc, BOOLEAN bUseExternalAgc,unsigned int uiChargePump,unsigned int uiAgcTimeConstant)
{
	//add 1.75 MHz to the picture carrier frequency
	return TunerDTT760xATSCSendFreq(ulFrequency + 1750  ,iRefDividerRatio,uiAgc, bUseExternalAgc,uiChargePump, uiAgcTimeConstant); 
}


// Function name	: TunerDTT760xATSCGetFrequency
// Description	    : returns the frequency in KHz
// Return type		: unsigned short 
// Argument         : unsigned int uiChannelNumber
unsigned long TunerDTT760xATSCGetFrequency(unsigned int uiChannelNumber, CHANNEL_TABLE_TYPE iChannelTable)
{
	unsigned long ulFreq = 0;
	#if 0 //old code only support ATSC Terrestrial
	if ((uiChannelNumber >=2) && (uiChannelNumber <= 6)) {
		switch (uiChannelNumber) {
			case 2:
				ulFrequency = 57;
				break;
			case 3:
				ulFrequency = 63;
				break;
			case 4:
				ulFrequency = 69;
				break;
			case 5:
				ulFrequency = 79;
				break;
			case 6:
				ulFrequency = 85;
				break;
		}
	}
	else if ((uiChannelNumber >= 7) && (uiChannelNumber <= 13)) {
		ulFrequency = 174 + ((uiChannelNumber - 7) * 6) + 3; 
	}
	else if ((uiChannelNumber >= 14) && (uiChannelNumber <= 69)) {
		ulFrequency = 470 + ((uiChannelNumber - 14) * 6) + 3; 
	}
	else{
		return 0;
	}
	return (1000*ulFrequency);
	#endif
	
	// to support digital cable for Lynx
	if(NA_TERRESTRIAL ==  iChannelTable){//terrestrial
		if ((uiChannelNumber >= 2) && (uiChannelNumber <= 6)) {
			switch (uiChannelNumber) {
				case 2:
					ulFreq = 57;
					break;
				case 3:
					ulFreq = 63;
					break;
				case 4:
					ulFreq = 69;
					break;
				case 5:
					ulFreq = 79;
					break;
				case 6:
					ulFreq = 85;
					break;
			}
		}
		else if ((uiChannelNumber >= 7) && (uiChannelNumber <= 13)) {
			ulFreq = 174 + ((uiChannelNumber - 7) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 14) && (uiChannelNumber <= 69)) {
			ulFreq = 470 + ((uiChannelNumber - 14) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 14) && (uiChannelNumber <= 77)) {
			ulFreq = 470 + ((uiChannelNumber - 14) * 6) + 3; 
		}
		else{
			return 0;
		}

		return ulFreq * 1000;

	}	
	else if(NA_CATV ==  iChannelTable){//CATV
		if ((uiChannelNumber >= 1) && (uiChannelNumber <= 6)) {
			switch (uiChannelNumber) {
				case 1:
					ulFreq = 75;
					break;
				case 2:
					ulFreq = 57;
					break;
				case 3:
					ulFreq = 63;
					break;
				case 4:
					ulFreq = 69;
					break;
				case 5:
					ulFreq = 79;
					break;
				case 6:
					ulFreq = 85;
					break;
			}
		}
		else if ((uiChannelNumber >= 95) && (uiChannelNumber <= 99)) {
			ulFreq = 90 + ((uiChannelNumber - 95) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 7) && (uiChannelNumber <= 13)) {
			ulFreq = 174 + ((uiChannelNumber - 7) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 14) && (uiChannelNumber <= 22)) {
			ulFreq = 120 + ((uiChannelNumber - 14) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 23) && (uiChannelNumber <= 94)) {
			ulFreq = 216 + ((uiChannelNumber - 23) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 100) && (uiChannelNumber <= 135)) {
			ulFreq = 648 + ((uiChannelNumber - 100) * 6) + 3; 
		}
		else{
			return 0;
		}

		return ulFreq * 1000;

	}
	else if(IRC ==  iChannelTable){//IRC
		if ((uiChannelNumber >= 1) && (uiChannelNumber <= 6)) {
			switch (uiChannelNumber) {
				case 1:
					ulFreq = 75;
					break;
				case 2:
					ulFreq = 57;
					break;
				case 3:
					ulFreq = 63;
					break;
				case 4:
					ulFreq = 69;
					break;
				case 5:
					ulFreq = 81;
					break;
				case 6:
					ulFreq = 87;
					break;
			}
		}
		else if ((uiChannelNumber >= 95) && (uiChannelNumber <= 99)) {
			ulFreq = 90 + ((uiChannelNumber - 95) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 7) && (uiChannelNumber <= 13)) {
			ulFreq = 174 + ((uiChannelNumber - 7) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 14) && (uiChannelNumber <= 22)) {
			ulFreq = 120 + ((uiChannelNumber - 14) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 23) && (uiChannelNumber <= 94)) {
			ulFreq = 216 + ((uiChannelNumber - 23) * 6) + 3; 
		}
		else if ((uiChannelNumber >= 100) && (uiChannelNumber <= 135)) {
			ulFreq = 648 + ((uiChannelNumber - 100) * 6) + 3; 
		}
		else{
			return 0;
		}
	
		return ulFreq * 1000;
	}
	else if(HRC ==  iChannelTable){//HRC
		if ((uiChannelNumber >= 1) && (uiChannelNumber <= 6)) {
			switch (uiChannelNumber) {
				case 1:
					ulFreq = 73753;
					break;
				case 2:
					ulFreq = 55753;
					break;
				case 3:
					ulFreq = 61753;
					break;
				case 4:
					ulFreq = 67753;
					break;
				case 5:
					ulFreq = 79754;
					break;
				case 6:
					ulFreq = 85754;
					break;
			}
		}
		else if ((uiChannelNumber >= 95) && (uiChannelNumber <= 99)) {
			ulFreq = (917545 + ((uiChannelNumber - 95) * 60003))/10; 
		}
		else if ((uiChannelNumber >= 7) && (uiChannelNumber <= 13)) {
			ulFreq = (1757587 + ((uiChannelNumber - 7) * 60003))/10; 
		}
		else if ((uiChannelNumber >= 14) && (uiChannelNumber <= 22)) {
			ulFreq = (1217560 + ((uiChannelNumber - 14) * 60003))/10; 
		}
		else if ((uiChannelNumber >= 23) && (uiChannelNumber <= 94)) {
			ulFreq = (2177608 + ((uiChannelNumber - 23) * 60003))/10; 
		}
		else if ((uiChannelNumber >= 100) && (uiChannelNumber <= 135)) {
			ulFreq = (6497824 + ((uiChannelNumber - 100) * 60003))/10; 
		}
		else{
			return 0;
		}

		return ulFreq ;
	}
	else
		return 0;

}

BOOLEAN TunerDTT760xATSCSetRFFreq(unsigned long ulFrequency,BOOLEAN bUseExternalAgc,unsigned char *Bb)
{
	if ((ulFrequency >= DTT760xATSC_LOW_BAND_MIN) && (ulFrequency <= DTT760xATSC_LOW_BAND_MAX) ) {
		if(bUseExternalAgc){
			*Bb &= ~0x08;
			*Bb &= ~0x04;
			*Bb &= ~0x02;
			*Bb |= 0x01;
		}
		else{
			*Bb |= 0x08;
			*Bb &= ~0x04;
			*Bb &= ~0x02;
			*Bb |= 0x01;
		}
	}
	else if((ulFrequency >=  DTT760xATSC_MID_BAND_MIN) && (ulFrequency <= DTT760xATSC_MID_BAND_MAX)){
		if(bUseExternalAgc){
			*Bb &= ~0x08;
			*Bb &= ~0x04;
			*Bb |= 0x02;
			*Bb &= ~0x01;
		}
		else{
			*Bb |= 0x08;
			*Bb &= ~0x04;
			*Bb |= 0x02;
			*Bb &= ~0x01;
		}
	}
	else if((ulFrequency >= DTT760xATSC_HIGH_BAND_MIN) && (ulFrequency <= DTT760xATSC_HIGH_BAND_MAX)){
		if(bUseExternalAgc){
			*Bb &= ~0x08;
			*Bb |= 0x04;
			*Bb &= ~0x02;
			*Bb &= ~0x01;
		}
		else{
			*Bb |= 0x08;
			*Bb |= 0x04;
			*Bb &= ~0x02;
			*Bb &= ~0x01;
		}
	}
	else 
		return FALSE;
	return TRUE;
}


// Function name	: TunerDTT760xATSCSetN
// Description	    : gets the frequency as Khz and calculates the N value
// Return type		: BOOLEAN 
// Argument         :  unsigned long ulFrequency the frequency in Khz
// Argument         : unsigned char *Divider_Byte1
// Argument         : unsigned char *Divider_Byte2
BOOLEAN TunerDTT760xATSCSetN( unsigned long ulFrequency, TYPE_TUNERDTT760xATSC_REF_DIVIDER_RATIO iRefDividerRatio,unsigned char *Divider_Byte1, unsigned char *Divider_Byte2)
{
	// calc N
	unsigned short usNval,usMultiplier=0;
	unsigned char ucNlow8,ucNbits8_14;

	//1/(dRefDividerRatio/1000)
	switch(iRefDividerRatio){
	case TUNERDTT760xATSC_REF_DIVIDER_RATIO_31_25:
		usMultiplier = 32;
		break;
	case TUNERDTT760xATSC_REF_DIVIDER_RATIO_50:
		usMultiplier = 20;
		break;
	case TUNERDTT760xATSC_REF_DIVIDER_RATIO_62_5:
		usMultiplier = 16;
		break;
	case TUNERDTT760xATSC_REF_DIVIDER_RATIO_166_7:
		usMultiplier = 6;
		break;
	}

	usNval = (unsigned short)(((ulFrequency + DTT760xATSC_F_IF_KHZ) * usMultiplier)/1000);
	if(usNval > DTT760xATSC_N_MAX){ 
		//max n in 15 bits
		usNval = usNval/2;
	}
	
	// set N
	if (usNval <= 0 || usNval >= DTT760xATSC_N_MAX){ //15 bits
        return FALSE;
    }

	// clear N bits
	*Divider_Byte1 &= 0x00;
	*Divider_Byte2 &= 0x00;

    ucNlow8 = usNval & 0x00FF;
    ucNbits8_14 = (usNval & 0x07f00) >> 8;

    *Divider_Byte2 = ucNlow8;
	*Divider_Byte1 = 0x00;
    *Divider_Byte1 |= ucNbits8_14; 

	return TRUE;
}

BOOLEAN TunerDTT760xATSCSetCP(unsigned int uiChargePump,unsigned char *Control_Byte1)
{
	if(60 == uiChargePump)
		*Control_Byte1 &= ~0x40;
	else if(280 == uiChargePump)
		*Control_Byte1 |= 0x40;
	else
		return FALSE;
	return TRUE;
}

BOOLEAN TunerDTT760xATSCSetStepSize(TYPE_TUNERDTT760xATSC_REF_DIVIDER_RATIO iRefDividerRatio ,unsigned char *Control_Byte1,unsigned char *Control_Byte2)
{
	if (TUNERDTT760xATSC_REF_DIVIDER_RATIO_50 == iRefDividerRatio) {
		*Control_Byte1 &= ~0x06;
		*Control_Byte2 &= ~0x06;
	}
	else if (TUNERDTT760xATSC_REF_DIVIDER_RATIO_31_25== iRefDividerRatio) {
		*Control_Byte1 |= 0x02;
		*Control_Byte1 &= ~0x04;
		*Control_Byte2 |= 0x02;
		*Control_Byte2 &= ~0x04;
	}
	else if (TUNERDTT760xATSC_REF_DIVIDER_RATIO_166_7 == iRefDividerRatio) {
		*Control_Byte1 &= ~0x02;
		*Control_Byte1 |= 0x04;
		*Control_Byte2 &= ~0x02;
		*Control_Byte2 |= 0x04;
	}
	else if (TUNERDTT760xATSC_REF_DIVIDER_RATIO_62_5 == iRefDividerRatio) {
		*Control_Byte1 |= 0x06;
		*Control_Byte2 |= 0x06;
	}
	else
		return FALSE;
	return TRUE;
}


BOOLEAN TunerDTT760xATSCSetAGC(unsigned int uiAgc,unsigned char *Auxiliary_Byte)
{
	if (106 == uiAgc) {
		*Auxiliary_Byte |= ~0x70;
	}
	else if (103== uiAgc) {
		*Auxiliary_Byte |= 0x10;
		*Auxiliary_Byte &= ~0x20;
		*Auxiliary_Byte &= ~0x40;
	}
	else if (100 == uiAgc) {
		*Auxiliary_Byte &= ~0x10;
		*Auxiliary_Byte |= 0x20;
		*Auxiliary_Byte &= ~0x40;
	}
	else if (97 == uiAgc) {
		*Auxiliary_Byte |= 0x10;
		*Auxiliary_Byte |= 0x20;
		*Auxiliary_Byte &= ~0x40;
	}
	else if (94 == uiAgc) {
		*Auxiliary_Byte &= ~0x10;
		*Auxiliary_Byte &= ~0x20;
		*Auxiliary_Byte |= 0x40;
	}
	else if (91 == uiAgc) {
		*Auxiliary_Byte |= 0x10;
		*Auxiliary_Byte &= ~0x20;
		*Auxiliary_Byte |= 0x40;
	}
	else
		return FALSE;
	return TRUE;
}

BOOLEAN TunerDTT760xATSCSetATC(unsigned int uiATC,unsigned char *Auxiliary_Byte)
{
	if (50 == uiATC) 
		*Auxiliary_Byte |= 0x80; 
	else if (2== uiATC) 
		*Auxiliary_Byte &= ~0x80; 
	else
		return FALSE;
	return TRUE;
}

unsigned int TunerDTT760xATSCSendControlData(unsigned char Divider_Byte1, unsigned char Divider_Byte2, unsigned char Control_Byte1, unsigned char Band_Switch_Byte, unsigned char Auxiliary_Byte,unsigned char Control_Byte2)
{
	unsigned char str[10];
	if( !TunerDTT760xATSCBeforeSendBytes())
		return TUNER_DTT760xATSC_BEFORE_SEND_BYTES_FAILED;

	str[0] = Divider_Byte1;
	str[1] = Divider_Byte2;	
	str[2] = Control_Byte1;
	str[3] = Band_Switch_Byte;
	str[4]= '\0';
	if (IIC_COM_SUCCESS !=  OrenIicTransmit(DTT7600ATSC_DEVICE_ADDRESS_WRITE, str, 4)) {
		return TUNER_DTT760xATSC_SEND_CONTROL_DATA_FAILED;
	}

	str[0] = Control_Byte2;
	str[1] = Auxiliary_Byte;	
	str[2]= '\0';
	if (IIC_COM_SUCCESS !=  OrenIicTransmit(DTT7600ATSC_DEVICE_ADDRESS_WRITE, str, 2)) {
		return TUNER_DTT760xATSC_SEND_CONTROL_DATA_FAILED;
	}

	if( !TunerDTT760xATSCAfterSendBytes())
		return TUNER_DTT760xATSC_AFTER_SEND_BYTES_FAILED;
	
	else
		return TUNER_DTT760xATSC_SUCCESS;
}

BOOLEAN TunerDTT760xATSCBeforeSendBytes(void)
{
	if(IIC_COM_SUCCESS != SendHostControl(0, 0))
		return FALSE;
	else
		return TRUE;
}

BOOLEAN TunerDTT760xATSCAfterSendBytes(void)
{
	if(IIC_COM_SUCCESS != SendHostControl(0x80, 0))
		return FALSE;
	else
		return TRUE;
}

void TunerDTT760xATSCInitsendBytes(unsigned char *Divider_Byte1, unsigned char *Divider_Byte2, unsigned char *Control_Byte1, unsigned char *Band_Switch_Byte, unsigned char *Auxiliary_Byte,unsigned char *Control_Byte2)
{
	*Divider_Byte1 = 0;
	*Divider_Byte2 = 0;
	*Control_Byte1 = 0xcc;
	*Band_Switch_Byte = 0;
	*Band_Switch_Byte &= ~0xC0;
	*Auxiliary_Byte = 0;
	*Control_Byte2 = 0x98; 
}