diff options
Diffstat (limited to 'drivers/netconsole.c')
| -rw-r--r-- | drivers/netconsole.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/drivers/netconsole.c b/drivers/netconsole.c new file mode 100644 index 0000000..7e19161 --- /dev/null +++ b/drivers/netconsole.c @@ -0,0 +1,204 @@ +/* + * (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 */ |