dm9000.c

S3C2440驱动DM9000A的裸机程序

#include "MyLib.h"


U32 gEthInit;//用到gMyPhy[6];

U32 DM_readreg(U32 reg)
{
	DM9000_ADDR=reg;
	return DM9000_DATA;
}

void DM_writereg(U32 reg, U8 value)
{
	DM9000_ADDR=reg;
	DM9000_DATA=value;
}

void DM9000_SetPhy(U8 *Phy)
{
	U32 i;
	for(i=0; i<6; i++)
		gMyPhy[i]=Phy[i];
}

U8 DM9000_init(void)
{
	U32 i;
	gEthInit=0;
	GPDR1|=0x40000000;
	GPSR1=0x40000000;
	Delay_us(10000);
	GPCR1=0x40000000;
	Delay_us(100000);
	DM_writereg(0x00, 0x01);				// Reset DM9000
	Delay_us(2000);
	if((DM_readreg(0x28)==0x46)&&(DM_readreg(0x29)==0x0A)&&
		(DM_readreg(0x2A)==0x00)&&(DM_readreg(0x2B)==0x90)){
		gEthInit=1;
		for(i=0; i<6; i++)
			DM_writereg(16+i, gMyPhy[i]);	// Set PHY address
		for(i=0x16; i<=0x1D; i++)			// Set Multicast Address
			DM_writereg(i, 0xFF);
		DM_writereg(0x1F, 0x00);			// Power up PHY
		DM_writereg(0xFF, 0x80);			// Enable SRAM auto rewind
		DM_writereg(0x05, 0x31);			// RX enable, Discard Long Packet and CRC Error Packet
		return 1;
	}else{
		return 0;
	}
}

void RTL8019_SendBuf(U8 *buf,U32 len);// 发送一个数据包的命令,长度最小为60字节,最大1514字节

U32 RTL8019_RecvBuf(U8 *buf);

void DM9000_SendBuf(U8 *buf, U32 len)
{
	RTL8019_SendBuf((U8*)buf,len);
}

U32 DM9000_RecvBuf(U8 *buf)
{
	return RTL8019_RecvBuf((U8*)buf);

}
/*
void DM9000_SendBuf(U32 *buf, U32 len)
{
	U32 i;
	if(!gEthInit)
		return;
	DM9000_ADDR=0xF8;							// Set Auto Increase mode
	for(i=0; i<(len+3)/4; i++)				// Fill TX data
		DM9000_DATA=buf[i];
	DM_writereg(0xFC, len&0xFF);
	DM_writereg(0xFD, (len>>8)&0xFF);
	DM_writereg(0x02, 0x01);				// Send Start
	while(DM_readreg(0x02)&0x01);			// Wait until send complete
}

U32 DM9000_RecvBuf(U32 *buf)
{
	U32 status,i,ret;
	U16 RxStatus,RxLen;
	if(!gEthInit)
		return 0;
	ret=0;
	status=DM_readreg(0xF0);				// Get RX status
	status=DM_readreg(0xF0);				// Get RX status
	switch(status&0xFF){						// First byte must be 0 or 1
	case 0:										// No valid packet
		break;
	case 1:										// Valid packet
		status=DM_readreg(0xF2);			// Read and move pointer
		RxStatus=status&0xFFFF;  RxLen=(status>>16)&0xFFFF;
		if((RxStatus&0xBF00)||(RxLen<64)||(RxLen>1540)){	// Error
			DM9000_init();
		}else{
			for(i=0; i<(RxLen+3)/4; i++)
				buf[i]=DM9000_DATA;
			ret=RxLen-4;
		}
		break;
	default:										// Error
		DM9000_init();
		break;
	}
	return ret;
}
*/