nes-proj/cpu/avr/dev/rtl8019as-drv.c

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/*
* Copyright (c) 2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Adam Dunkels.
* 4. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: rtl8019as-drv.c,v 1.1 2006/06/17 22:41:21 adamdunkels Exp $
*
*/
/* uip_main.c: initialization code and main event loop. */
#define NULL (void *)0
#include "uip.h"
#include "uip_arp.h"
#include "uip-signal.h"
#include "loader.h"
#include "rtl8019dev.h"
#include "dispatcher.h"
#include "ek.h"
#include "debug.h"
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
static u8_t i, arptimer;
static u16_t start, current;
static void rtl8019_drv_idle(void);
static DISPATCHER_SIGHANDLER(rtl8019_drv_sighandler, s, data);
static struct dispatcher_proc p =
{DISPATCHER_PROC("TCP/IP/RTL8019 driver", rtl8019_drv_idle,
rtl8019_drv_sighandler, NULL)};
ek_id_t id = EK_ID_NONE;
/*-----------------------------------------------------------------------------------*/
static void
timer(void)
{
for(i = 0; i < UIP_CONNS; ++i) {
uip_periodic(i);
if(uip_len > 0) {
uip_arp_out();
rtl8019as_send();
}
}
for(i = 0; i < UIP_UDP_CONNS; i++) {
uip_udp_periodic(i);
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if(uip_len > 0) {
uip_arp_out();
rtl8019as_send();
}
}
}
/*-----------------------------------------------------------------------------------*/
static void
rtl8019_drv_idle(void)
{
/* Poll Ethernet device to see if there is a frame avaliable. */
uip_len = rtl8019as_poll();
if(uip_len > 0) {
/* A frame was avaliable (and is now read into the uip_buf), so
we process it. */
if(BUF->type == htons(UIP_ETHTYPE_IP)) {
/* debug_print16(uip_len);*/
uip_arp_ipin();
uip_len -= sizeof(struct uip_eth_hdr);
uip_input();
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if(uip_len > 0) {
/* debug_print(PSTR("Sending packet\n"));*/
uip_arp_out();
rtl8019as_send();
}
} else if(BUF->type == htons(UIP_ETHTYPE_ARP)) {
uip_arp_arpin();
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if(uip_len > 0) {
rtl8019as_send();
}
}
}
/* Check the clock so see if we should call the periodic uIP
processing. */
current = ek_clock();
if((current - start) >= CLK_TCK/2 ||
(current - start) < 0) {
timer();
start = current;
}
}
/*-----------------------------------------------------------------------------------*/
LOADER_INIT_FUNC(rtl8019_drv_init)
{
if(id == EK_ID_NONE) {
id = dispatcher_start(&p);
arptimer = 0;
start = ek_clock();
rtl8019as_init();
dispatcher_listen(uip_signal_uninstall);
}
}
/*-----------------------------------------------------------------------------------*/
static
DISPATCHER_SIGHANDLER(rtl8019_drv_sighandler, s, data)
{
DISPATCHER_SIGHANDLER_ARGS(s, data);
if(s == uip_signal_uninstall) {
dispatcher_exit(&p);
id = EK_ID_NONE;
LOADER_UNLOAD();
}
}
/*-----------------------------------------------------------------------------------*/