web_init.c

来自「裸板的tftp客户端」· C语言 代码 · 共 78 行

#include "./include/web_init.h"
#include "./include/myout.h"
U16 get_reg_init_bus (U32 regno)
{
	// force 16 bit busmode 
	char c;

	c = CS8900_BUS16_0;
	c = CS8900_BUS16_1;
	c = CS8900_BUS16_0;
	c = CS8900_BUS16_1;
	c = CS8900_BUS16_0;

	CS8900_PPTR = regno;
	return (U16) CS8900_PDATA;
}


U16 get_reg (U32 regno)
{
	CS8900_PPTR = regno;
	return (U16) CS8900_PDATA;
}


void put_reg (U32 regno, U16 val)
{
	CS8900_PPTR = regno;
	CS8900_PDATA = val;
}

void eth_reset (void)
{
	
	// reset NIC 
	put_reg (PP_SelfCTL, get_reg (PP_SelfCTL) | PP_SelfCTL_Reset);

	// Wait until the chip is reset 
	while ((( get_reg(PP_SelfSTAT)) & PP_SelfSTAT_InitD) !=  PP_SelfSTAT_InitD);
}

void eth_reginit (void)
{
	// receive only error free packets addressed to this card 
	put_reg (PP_RxCTL, PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK | PP_RxCTL_Promiscuous);
	// do not generate any interrupts on receive operations 
	put_reg (PP_RxCFG, 0);
	// do not generate any interrupts on transmit operations 
	put_reg (PP_TxCFG, 0);
	// do not generate any interrupts on buffer operations 
	put_reg (PP_BufCFG, 0);
	// enable transmitter/receiver mode 
	put_reg (PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
	put_reg (PP_BusCtl, 0);
}


U32 eth_init (U8 *Mac)
{

	// verify chip id 
	if (get_reg_init_bus (PP_ChipID) != 0x630e) {
		MyOut("%s","CS8900 Ethernet chip not found?!");
		return 0;
	}

	eth_reset ();
	// set the ethernet address 
	put_reg (PP_IA + 0, Mac[0] | (Mac[1] << 8));
	put_reg (PP_IA + 2, Mac[2] | (Mac[3] << 8));
	put_reg (PP_IA + 4, Mac[4] | (Mac[5] << 8));

	eth_reginit ();
	return 0;
}