netinit.c

来自「2410 boot loader,usb ftp」· C语言 代码 · 共 107 行

/*
	Copyright 2001-2004 Georges Menie (www.menie.org)

	This file is part of Tftpnaive.

    Tftpnaive is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    Tftpnaive is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Tftpnaive; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "tftpnaive.h"
#include "io.h"
#include "net.h"
#include "timer.h"
#include "cs89x.h"

static net_init=0;                        
                        
int netUp (char *mac)
{
	int error;

    /* Probe cs89xx */
    if(!net_init)
    {
     error = cs89xProbe();
     if(error) return error;
     else net_init=1;
    }
    
    memset(&netif, 0, sizeof(netif));

	//memcpy (netif.IEEEIA, (void *) 0x400fffa, sizeof netif.IEEEIA);
	
	netif.IEEEIA[0] = mac[0];
	netif.IEEEIA[1] = mac[1];
	netif.IEEEIA[2] = mac[2];
	netif.IEEEIA[3] = mac[3];
	netif.IEEEIA[4] = mac[4];
	netif.IEEEIA[5] = mac[5];
	
	
	netif.send = cs89xSend;

	error = cs89xReset ();
	if (error) return error;
	

	/* Set interrupt service routine */
	pISR_EINT8_23 = (unsigned int)cs89xISR;


    /* Configure gpio as external interrupt #9 */
	rGPGCON &= ~(3 << 2);
	rGPGCON |=  (2 << 2);

	/* Interrupt Rising Edge Detect Mode */
	rEXTINT1 &= ~(7 << 4);
	rEXTINT1 |=  (4 << 4);	

	/* Interrupt High Level Detect Mode */
	//rEXTINT1 &= ~(7 << 4);
	//rEXTINT1 |=  (1 << 4);	
	
	/* Interrupt Both Edge Detect Mode */
	//rEXTINT1 &= ~(7 << 4);
	//rEXTINT1 |=  (6 << 4);			
	
	
	/* network chip initialization
	 * if there is a error the function returns to the caller.
	 */
	error = cs89xSetup ();
	if (error) return error;


	/* Enable Interrupt */
	rINTMSK   &= ~(1<<5);	// EINT8~23
	rEINTMASK &= ~(1<<9);	// EINT9
	

	return 0;
}

int netDown (void)
{
	net_init = 0;
	
	/* Disable Interrupt */
    rINTMSK   |= (1<<5);		// EINT8~23
	rEINTMASK |= (1<<9);		// EINT9
	

	return cs89xReset ();
}