u-boot for Mediatek MT623x baseband processor
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uboot-mt623x/net/rarp.c

116 lines
2.8 KiB

/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <net.h>
#include "nfs.h"
#include "bootp.h"
#include "rarp.h"
#include "tftp.h"
#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
#ifndef CONFIG_NET_RETRY_COUNT
# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
#else
# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
#endif
int RarpTry;
/*
* Handle a RARP received packet.
*/
static void
RarpHandler(uchar * dummi0, unsigned dummi1, unsigned dummi2, unsigned dummi3)
{
char *s;
debug("Got good RARP\n");
if ((s = getenv("autoload")) != NULL) {
if (*s == 'n') {
/*
* Just use RARP to configure system;
* Do not use TFTP/NFS to to load the bootfile.
*/
NetState = NETLOOP_SUCCESS;
return;
#if defined(CONFIG_CMD_NFS)
} else if ((s != NULL) && !strcmp(s, "NFS")) {
NfsStart();
return;
#endif
}
}
TftpStart ();
}
/*
* Timeout on BOOTP request.
*/
static void
RarpTimeout(void)
{
if (RarpTry >= TIMEOUT_COUNT) {
puts ("\nRetry count exceeded; starting again\n");
NetStartAgain ();
} else {
NetSetTimeout (TIMEOUT, RarpTimeout);
RarpRequest ();
}
}
void
RarpRequest (void)
{
int i;
volatile uchar *pkt;
ARP_t * rarp;
printf("RARP broadcast %d\n", ++RarpTry);
pkt = NetTxPacket;
pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
rarp = (ARP_t *)pkt;
rarp->ar_hrd = htons (ARP_ETHER);
rarp->ar_pro = htons (PROT_IP);
rarp->ar_hln = 6;
rarp->ar_pln = 4;
rarp->ar_op = htons (RARPOP_REQUEST);
memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
/* dest. IP addr set to broadcast */
for (i = 0; i <= 3; i++) {
rarp->ar_data[16 + i] = 0xff;
}
NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
NetSetTimeout(TIMEOUT, RarpTimeout);
NetSetHandler(RarpHandler);
}