cnec.c

这是一个SIGMA方案的PMP播放器的UCLINUX程序,可播放DVD,VCD,CD MP3...有很好的参考价值.

/******************************************************************************/
/*  cnec.c : specific code for NEC board
*  REALmagic Quasar Hardware Library
*  Created by Aurelia Popa-Radu
*  Copyright Sigma Designs Inc
*  Sigma Designs Proprietary and confidential
*  Created on 03/06/01
*  Description:
/******************************************************************************/

/****h* HwLib/CNec_Implementation
 * DESCRIPTION
 *  CNec implementation of the IDecoderBoard interface.
 * NEC uses EM8470, EEPROM components to implement TV output, HDTV output.
 * NO VCXO and NO Videoin.
 * Identified by HwLib reading PciSubsystemID = 0x0002 and SubsystemVendorID = 0x1033.
 * PIO0	- IIC Clock for Eeprom
 * PIO1	- IIC Data for Eeprom
 * PIO5 - audio dac DZF pin - input for HwLib
 * PIO6 - Spdif enable  - output for HwLib
 * PIO7 - audio dac PDN pin (powerdown) - output for HwLib
 * Implementation based on CVE2000.
 * Specific implementation:
 * QRESULT CNec__AudioSetSampleRate(IDecoderBoard* pIDecoderBoard, DWORD Rate)
/******************************************************************************/

#include "pch.h"

#if defined NEC_BRD

#include "cqsrbrd.h"

// use predefined PIO0 and PIO1 for I2C_CLK_PIO, I2C_DATA_PIO
#define AUDIO_SPDIF_ENABLE_PIO		PIO6
#define AUDIO_POWERDOWN_PIO			PIO7

QRESULT CNec__AudioSetSampleRate(IDecoderBoard* pIDecoderBoard, DWORD Rate)
{
	CQuasarBoard *this = (CQuasarBoard*) pIDecoderBoard;

	if( (!(this->BoardAudioRate & FORCED_HW_UPDATE)) && (this->BoardAudioRate == Rate) )
		return Q_OK;

	this->BoardAudioRate = Rate & ~FORCED_HW_UPDATE;	// use most significant bit to force programming
	QDbgLog((QLOG_TRACE, QDebugLevelTrace, TEXT(" CNec__AudioSetSampleRate= %d"), this->BoardAudioRate));

	IDecoder_SetAudioSampleRate(this->m_pIDecoder, this->BoardAudioRate);

	IDecoder_WritePIO(this->m_pIDecoder, AUDIO_SPDIF_ENABLE_PIO, 1);
	IDecoder_WritePIO(this->m_pIDecoder, AUDIO_POWERDOWN_PIO, 1);
	{
	// we need reset for changing the sample rate
	BYTE AK4363_0 = 0x0B;
	BYTE AK4363_1 = 0x00;
	BYTE AK4363_2 = 0x05;

	II2C_Write(this->m_pII2C, 2, &AK4363_2, 1 );    // Set MUTE
	AK4363_1 |= ( (this->BoardAudioRate==32000) ? 0x80 : ((this->BoardAudioRate==44100)? 0x00 : 0x40) );
	II2C_Write(this->m_pII2C, 1, &AK4363_1, 1 );    // Set audio sampling rate & reset on second register
	II2C_Write(this->m_pII2C, 0, &AK4363_0, 1 );    // Cancel reset on first register!
	AK4363_2 = 0x94;
	II2C_Write(this->m_pII2C, 2, &AK4363_2, 1 );    // Cancel MUTE
	}
	return Q_OK;
}

QRESULT CNec__HwReset(IDecoderBoard* pIDecoderBoard)
{
	CQuasarBoard *this = (CQuasarBoard*) pIDecoderBoard;
	QRESULT qr = Q_OK;
	BYTE AK4363[5] = {0x0b, 0x01, 0x94, 0xff, 0xff};	// normal LR
//	BYTE AK4363[5] = {0x0b, 0x01, 0x64, 0xff, 0xff};	// reverse LR
	int i;

	qr = CVE2000__HwReset(pIDecoderBoard);
	IDecoder_WritePIO(this->m_pIDecoder, AUDIO_SPDIF_ENABLE_PIO, 1);
	IDecoder_WritePIO(this->m_pIDecoder, AUDIO_POWERDOWN_PIO, 1);
	for( i=0; i< sizeof(AK4363); i++)
		II2C_Write(this->m_pII2C, (BYTE)i, &AK4363[i], 1 );
	return qr;
}

void CNec__InitVtable(IDecoderBoard* pIDecoderBoard)
{
	CQuasarBoard* this = (CQuasarBoard*) pIDecoderBoard;

	this->lpVtbl->HwReset					= CNec__HwReset;
	this->lpVtbl->UpdateOverlay				= CVE2000__UpdateOverlay;
	this->lpVtbl->SetCustomTvHdtv			= CVE2000__SetCustomTvHdtv;

	this->lpVtbl->SelectVClk				= C847xBrd__SelectVClk;
	this->lpVtbl->AudioSetSampleRate		= CNec__AudioSetSampleRate;
	this->lpVtbl->VidSetVGATV				= C847xDigBrd__VidSetVGATV;
}

QRESULT CNec__SpecificCreateInstance(IDecoderBoard* pIDecoderBoard, DWORD dwInstance)
{
	CQuasarBoard* this = (CQuasarBoard*) pIDecoderBoard;

	this->BoardCapabilities |= (
		MPEG_CAPABILITY_TV_YUV_COMPONENT |
		MPEG_CAPABILITY_TV_RGB_COMPONENT |
		MPEG_CAPABILITY_HDTV_OUTPUT
		);

	this->pRegistry->Ccir_656 = CCIR_656;
	this->pRegistry->SyncEnable = 0;	// by default disable VS,HS,VVLD for 656
	this->pRegistry->TvOut = SET_TV | SET_NTSC | SET_ONETOONE;
	this->TvOut = SET_TV;

	// overwrite necessary values
	CNec__InitVtable(pIDecoderBoard);
	this->DeviceId = VENTURA2000_DEVICEID;
	this->BoardVersion = NEC;
	this->SubId = (this->BoardVersion>>8);

	if( (this->PciSubsystemID != 0x02) && (this->PciSubsystemVendorID != 0x1033) )
		QDbgLog((QLOG_TRACE, QDebugLevelWarning, TEXT("\n\nERROR: Create NEC is FORCED !") ));

	{
	DWORD Value = I2S_SCkinSCIN_Jda1CkinGCK_ScinIN_DamckIN;
	IDecoder_SetProperty(this->m_pIDecoder,
		DECODER_SET, edecAudioInOutConfig, 0, &Value, sizeof(DWORD), NULL);
	Value = 24;
	IDecoder_SetProperty(this->m_pIDecoder,
		DECODER_SET, edecAudioDacBitsPerSample, 0, &Value, sizeof(DWORD), NULL);
	}

	//VG (10/30/2002 6:39:12 PM)
	// updated on NEC request. originally was ( this->m_pII2C, 0x20,  0x21, 1)
	//
	II2C_SetI2CAddress( this->m_pII2C, 0x20,  0x21, 100);
	return Q_OK;
}

#endif	// NEC_BRD

#if defined NEC_BRD && !defined ANY_BRD

QRESULT CreateInstance(DWORD* pInstance, void* pHwLibConf)
{
	QRESULT qr = CommonCreateInstance(pInstance, pHwLibConf);
	if( QSUCCEEDED(qr) )
		qr = CNec__SpecificCreateInstance(g_pIDecoderBoard[*pInstance], *pInstance);

	if( QFAILED(qr) )
	{
		CQuasarBoard__DeleteObjects(g_pIDecoderBoard[*pInstance]);
		g_pIDecoderBoard[*pInstance] = 0;
		return E_CREATE_INSTANCE_FAILED;
	}

	return Q_OK;
}

#endif	// NEC_BRD && !ANY_BRD