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/*
* (C) Copyright 2004
* 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>
#ifdef CONFIG_NETCONSOLE
#include <command.h>
#include <devices.h>
#include <net.h>
#ifndef CONFIG_NET_MULTI
#error define CONFIG_NET_MULTI to use netconsole
#endif
static uchar nc_buf = 0; /* input buffer */
static int input_recursion = 0;
static int output_recursion = 0;
static int net_timeout;
static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
unsigned len)
{
NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
}
static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
unsigned len)
{
if (nc_buf)
NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
}
static void nc_timeout (void)
{
NetState = NETLOOP_SUCCESS;
}
void NcStart (void)
{
if (memcmp (NetServerEther, NetEtherNullAddr, 6)) {
/* going to check for input packet */
NetSetHandler (nc_handler);
NetSetTimeout (net_timeout, nc_timeout);
} else {
/* send arp request */
NetSetHandler (nc_wait_arp_handler);
NetSendUDPPacket (NetServerEther, NetServerIP, 6665, 6666, 0);
}
}
int nc_input_packet (uchar * pkt, unsigned dest, unsigned src, unsigned len)
{
if (dest != 6666 || !len)
return 0; /* not for us */
nc_buf = *pkt;
return 1;
}
static void nc_send_packet (const char *buf, int len)
{
DECLARE_GLOBAL_DATA_PTR;
struct eth_device *eth;
int inited = 0;
uchar *pkt;
if (!memcmp (NetServerEther, NetEtherNullAddr, 6))
return;
if ((eth = eth_get_dev ()) == NULL) {
return;
}
if (eth->state != ETH_STATE_ACTIVE) {
if (eth_init (gd->bd) < 0)
return;
inited = 1;
}
pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
memcpy (pkt, buf, len);
NetSendUDPPacket (NetServerEther, NetServerIP, 6666, 6665, len);
if (inited)
eth_halt ();
}
int nc_start (void)
{
if (memcmp (NetServerEther, NetEtherNullAddr, 6))
return 0;
return NetLoop (NETCONS); /* wait for arp reply */
}
void nc_putc (char c)
{
if (output_recursion)
return;
output_recursion = 1;
nc_send_packet (&c, 1);
output_recursion = 0;
}
void nc_puts (const char *s)
{
if (output_recursion)
return;
output_recursion = 1;
int len = strlen (s);
if (len > 512)
len = 512;
nc_send_packet (s, len);
output_recursion = 0;
}
int nc_getc (void)
{
input_recursion = 1;
net_timeout = 0; /* no timeout */
while (!nc_buf)
NetLoop (NETCONS);
input_recursion = 0;
uchar tmp = nc_buf;
nc_buf = 0;
return tmp;
}
int nc_tstc (void)
{
struct eth_device *eth;
if (input_recursion)
return 0;
if (nc_buf)
return 1;
eth = eth_get_dev ();
if (eth && eth->state == ETH_STATE_ACTIVE)
return 0; /* inside net loop */
input_recursion = 1;
net_timeout = 1;
NetLoop (NETCONS); /* kind of poll */
input_recursion = 0;
return nc_buf != 0;
}
int drv_nc_init (void)
{
device_t dev;
int rc;
memset (&dev, 0, sizeof (dev));
strcpy (dev.name, "nc");
dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
dev.start = nc_start;
dev.putc = nc_putc;
dev.puts = nc_puts;
dev.getc = nc_getc;
dev.tstc = nc_tstc;
rc = device_register (&dev);
return (rc == 0) ? 1 : rc;
}
#endif /* CONFIG_NETCONSOLE */
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