📄 rtl8019.c
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for(i=0;i<length;i++)
rtl8019Write(RDMAPORT, localBuffer[i]);
}
void rtl8019EndPacketSend(void)
{
//send the contents of the transmit buffer onto the network
rtl8019Write(CR,0x24);
// clear the remote DMA interrupt
rtl8019Write(ISR, (1<<ISR_RDC));
}
// pointers to locations in the RTL8019 receive buffer
static unsigned char nextPage;
static unsigned int currentRetreiveAddress;
// location of items in the RTL8019's page header
#define enetpacketstatus 0x00
#define nextblock_ptr 0x01
#define enetpacketLenL 0x02
#define enetpacketLenH 0x03
unsigned int rtl8019BeginPacketRetreive(void)
{
unsigned char i;
unsigned char bnry;
unsigned char pageheader[4];
unsigned int rxlen;
// check for and handle an overflow
rtl8019ProcessInterrupt();
// read CURR from page 1
rtl8019Write(CR,0x62);
i = rtl8019Read(CURR);
// return to page 0
rtl8019Write(CR,0x22);
// read the boundary register - pointing to the beginning of the packet
bnry = rtl8019Read(BNRY) ;
// return if there is no packet in the buffer
if( bnry == i )
return 0;
// clear the packet received interrupt flag
rtl8019Write(ISR, (1<<ISR_PRX));
// the boundary pointer is invalid, reset the contents of the buffer and exit
if( (bnry >= RXSTOP_INIT) || (bnry < RXSTART_INIT) )
{
rtl8019Write(BNRY, RXSTART_INIT);
rtl8019Write(CR, 0x62);
rtl8019Write(CURR, RXSTART_INIT);
rtl8019Write(CR, 0x22);
return 0;
}
// initiate DMA to transfer the RTL8019 packet header
rtl8019Write(RBCR0, 4);
rtl8019Write(RBCR1, 0);
rtl8019Write(RSAR0, 0);
rtl8019Write(RSAR1, bnry);
rtl8019Write(CR, 0x0A);
for(i=0;i<4;i++)
pageheader[i] = rtl8019Read(RDMAPORT);
// end the DMA operation
rtl8019Write(CR, 0x22);
for(i = 0; i <= 20; i++)
if(rtl8019Read(ISR) & 1<<6)
break;
rtl8019Write(ISR, 1<<6);
rxlen = (pageheader[enetpacketLenH]<<8) + pageheader[enetpacketLenL];
nextPage = pageheader[nextblock_ptr] ;
currentRetreiveAddress = (bnry<<8) + 4;
// if the nextPage pointer is invalid, the packet is not ready yet - exit
if( (nextPage >= RXSTOP_INIT) || (nextPage < RXSTART_INIT) )
return 0;
return rxlen-4;
}
void rtl8019RetreivePacketData(unsigned char * localBuffer, unsigned int length)
{
unsigned int i;
// initiate DMA to transfer the data
rtl8019Write(RBCR0, (unsigned char)length);
rtl8019Write(RBCR1, (unsigned char)(length>>8));
rtl8019Write(RSAR0, (unsigned char)currentRetreiveAddress);
rtl8019Write(RSAR1, (unsigned char)(currentRetreiveAddress>>8));
rtl8019Write(CR, 0x0A);
for(i=0;i<length;i++)
localBuffer[i] = rtl8019Read(RDMAPORT);
// end the DMA operation
rtl8019Write(CR, 0x22);
for(i = 0; i <= 20; i++)
if(rtl8019Read(ISR) & 1<<6)
break;
rtl8019Write(ISR, 1<<6);
currentRetreiveAddress += length;
if( currentRetreiveAddress >= 0x6000 )
currentRetreiveAddress = currentRetreiveAddress - (0x6000-0x4600) ;
}
void rtl8019EndPacketRetreive(void)
{
unsigned char i;
// end the DMA operation
rtl8019Write(CR, 0x22);
for(i = 0; i <= 20; i++)
if(rtl8019Read(ISR) & 1<<6)
break;
rtl8019Write(ISR, 1<<6);
// set the boundary register to point to the start of the next packet
rtl8019Write(BNRY, nextPage);
}
void rtl8019Overrun(void)
{
unsigned char data_L, resend;
data_L = rtl8019Read(CR);
rtl8019Write(CR, 0x21);
delay_ms(2);
rtl8019Write(RBCR0, 0x00);
rtl8019Write(RBCR1, 0x00);
if(!(data_L & 0x04))
resend = 0;
else if(data_L & 0x04)
{
data_L = rtl8019Read(ISR);
if((data_L & 0x02) || (data_L & 0x08))
resend = 0;
else
resend = 1;
}
rtl8019Write(TCR, 0x02);
rtl8019Write(CR, 0x22);
rtl8019Write(BNRY, RXSTART_INIT);
rtl8019Write(CR, 0x62);
rtl8019Write(CURR, RXSTART_INIT);
rtl8019Write(CR, 0x22);
rtl8019Write(ISR, 0x10);
rtl8019Write(TCR, TCR_INIT);
if(resend)
rtl8019Write(CR, 0x26);
rtl8019Write(ISR, 0xFF);
}
/*****************************************************************************
* rtl8019_read_eprom_word(u08 adr);
*
* Created By: Volker Troyke www.troyke.de
* Date: September 28, 2004
* Description: Read the 93LC46 EEPROM containing Ethernet MAC (NE2000 Standard)
* connected to the rtl8019
*****************************************************************************/
#ifdef MAC_FROM_EEPROM
u16 rtl8019_read_eeprom_word(u08 adr)
{
u08 i, temp;
u16 result;
temp = ((adr & 0x1F) | 0x80);
rtl8019Write(CR, 0xE1); // Page 3
rtl8019Write(RTL_EECR, 0x80); // 9346 programming
rtl8019Write(RTL_EECR, 0x84); // 9346 programming CLK on
rtl8019Write(RTL_EECR, 0x80); // 9346 programming CKL off
rtl8019Write(RTL_EECR, 0x8A); // 9346 programming CS on Data on
rtl8019Write(RTL_EECR, 0x8E); // 9346 programming CLK on
rtl8019Write(RTL_EECR, 0x8A); // 9346 programming CKL off
for(i=0;i<8;i++) // Write "read" Command and Word-Adress
{
if( (temp >> (7-i)) & 0x01 )
{
rtl8019Write(RTL_EECR, 0x8A); // 9346 programming DI on
rtl8019Write(RTL_EECR, 0x8E); // 9346 programming CLK on
rtl8019Write(RTL_EECR, 0x8A); // 9346 programming CKL off
}
else
{
rtl8019Write(RTL_EECR, 0x88); // 9346 programming DI off
rtl8019Write(RTL_EECR, 0x8C); // 9346 programming CLK on
rtl8019Write(RTL_EECR, 0x88); // 9346 programming CKL off
}
}
rtl8019Write(RTL_EECR, 0x88); // 9346 programming DI off
result = 0;
for(i=0;i<16;i++) // Read 16 Bits of Data
{
rtl8019Write(RTL_EECR, 0x8C); // 9346 programming CLK on
rtl8019Write(RTL_EECR, 0x88); // 9346 programming CKL off
if( (rtl8019Read(RTL_EECR)) & 0x01)
{
result |= (1 << (15-i));
}
}
rtl8019Write(RTL_EECR, 0x80); // 9346 programming CS off
return result;
}
#endif
void rtl8019Init(void)
{
#ifdef MAC_FROM_EEPROM
#ifdef DISPLAY_MAC
char data[10];
#endif
struct uip_eth_addr eth_adr;
u08 i;
u16 temp;
#endif
rtl8019SetupPorts();
HARD_RESET_RTL8019();
// do soft reset
rtl8019Write( ISR, rtl8019Read(ISR) ) ;
delay_ms(20);
// switch to page 3 to load config registers
rtl8019Write(CR, 0xE1);
// disable EEPROM write protect of config registers
rtl8019Write(RTL_EECR, 0xC0);
// set network type to 10 Base-T link test
rtl8019Write(CONFIG2, 0x20);
// disable powerdown and sleep
rtl8019Write(CONFIG3, 0x00);
delay_ms(20);
#ifdef MAC_FROM_EEPROM
// read Ethernet MAC from EEPROM
for(i=0;i<3;i++)
{
temp = rtl8019_read_eeprom_word(0x02+i);
eth_adr.addr[(2*i)+1] = temp >> 8;
eth_adr.addr[(2*i)] = temp & 0x00FF;
}
#endif
// reenable EEPROM write protect
rtl8019Write(RTL_EECR, 0x00);
// go back to page 0
rtl8019Write(CR,0x21); // stop the NIC, abort DMA, page 0
delay_ms(2); // make sure nothing is coming in or going out
rtl8019Write(DCR, DCR_INIT); // 0x58
rtl8019Write(RBCR0,0x00);
rtl8019Write(RBCR1,0x00);
rtl8019Write(RCR,0x04);
rtl8019Write(TPSR, TXSTART_INIT);
rtl8019Write(TCR,0x02);
rtl8019Write(PSTART, RXSTART_INIT);
rtl8019Write(BNRY, RXSTART_INIT);
rtl8019Write(PSTOP, RXSTOP_INIT);
rtl8019Write(CR, 0x61);
delay_ms(2);
rtl8019Write(CURR, RXSTART_INIT);
rtl8019Write(CR, 0x61); //Page 1
#ifdef MAC_FROM_EEPROM
for(i=0;i<6;i++) // write MAC from EEPROM to rtl8019 Registers
{
rtl8019Write(PAR0+i,eth_adr.addr[i]);
#ifdef DISPLAY_MAC
lcd_gotoxy(1 + (i*3),2);
char2strh(eth_adr.addr[i], data);
lcd_puts(data);
lcd_puts_P(PSTR(" "));
#endif
}
#else
rtl8019Write(PAR0+0, MYMAC_0);
rtl8019Write(PAR0+1, MYMAC_1);
rtl8019Write(PAR0+2, MYMAC_2);
rtl8019Write(PAR0+3, MYMAC_3);
rtl8019Write(PAR0+4, MYMAC_4);
rtl8019Write(PAR0+5, MYMAC_5);
#endif
#ifdef DISPLAY_MAC
lcd_puts_P(PSTR(" "));
#endif
#ifdef MAC_FROM_EEPROM // write MAC to the ARP-Module
uip_setethaddr(eth_adr);
#endif
rtl8019Write(CR,0x21);
rtl8019Write(DCR, DCR_INIT);
rtl8019Write(CR,0x22);
rtl8019Write(ISR,0xFF);
rtl8019Write(IMR, IMR_INIT);
rtl8019Write(TCR, TCR_INIT);
rtl8019Write(CR, 0x22); // start the NIC
}
void rtl8019ProcessInterrupt(void)
{
unsigned char byte = rtl8019Read(ISR);
if( byte & (1<<ISR_OVW) )
rtl8019Overrun();
}
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