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/*
* Copyright 2007 Free Software Foundation, Inc.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "u2_init.h"
#include "memory_map.h"
#include "spi.h"
#include "hal_io.h"
#include "buffer_pool.h"
#include "pic.h"
#include "bool.h"
#include "ethernet.h"
#include "nonstdio.h"
#include "usrp2_eth_packet.h"
#include "memcpy_wa.h"
#include "print_rmon_regs.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
// ----------------------------------------------------------------
static u2_mac_addr_t dst_mac_addr =
{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }};
// ----------------------------------------------------------------
// #define PACKET_SIZE 1500 // bytes
// #define ETH_DATA_RATE 1000000 // 1MB/s
// #define ETH_PACKET_RATE (ETH_DATA_RATE/PACKET_SIZE) // 13,3333 pkts/s
// static int timer_delta = MASTER_CLK_RATE/ETH_PACKET_RATE; // ticks between interrupts
static int timer_delta = (int)(MASTER_CLK_RATE * 1e-3); // tick at 1 kHz
static int sim_timer_delta = (int)(MASTER_CLK_RATE * 100e-6); // tick at 10 kHz
static volatile bool send_packet_now = false; // timer handler sets this
static volatile bool link_is_up = false; // eth handler sets this
int packet_number = 0;
#define CPU_TX_BUF 0 // cpu xmits ethernet frames from here
#define CPU_RX_BUF 1 // receive ethernet frames here
// ----------------------------------------------------------------
/*
* Called when eth phy state changes (w/ interrupts disabled)
*/
void
link_changed_callback(int speed)
{
link_is_up = speed == 0 ? false : true;
hal_set_leds(link_is_up ? 0x2 : 0x0, 0x2);
printf("\neth link changed: speed = %d\n", speed);
}
void
timer_irq_handler(unsigned irq)
{
hal_set_timeout(timer_delta); // schedule next timeout
send_packet_now = 1;
}
static void
init_packet(int *buf, const u2_eth_packet_t *pkt, int bufnum)
{
int i = 0;
int mark = ((bufnum & 0xff) << 24) | 0x005A0000;
for (i = 0; i < BP_NLINES; i++){
buf[i] = mark | i;
mark ^= 0x00FF0000;
}
// copy header into buffer
memcpy_wa(buf, pkt, sizeof(*pkt));
}
static void
init_packets(void)
{
u2_eth_packet_t pkt __attribute__((aligned (4)));
memset(&pkt, 0, sizeof(pkt));
pkt.ehdr.dst = dst_mac_addr;
// src address filled in by mac
pkt.ehdr.ethertype = U2_ETHERTYPE;
pkt.fixed.word0 = 0x01234567;
pkt.fixed.timestamp = 0xffffffff;
// init just the one we're using
init_packet((void *)buffer_ram(CPU_TX_BUF), &pkt, CPU_TX_BUF);
}
int
main(void)
{
int npackets_sent = 0;
u2_init();
// setup tx gpio bits for GPIOM_FPGA_1 -- fpga debug output
//hal_gpio_set_sels(GPIO_TX_BANK, "1111111111111111");
//hal_gpio_set_sels(GPIO_RX_BANK, "1111111111111111");
putstr("\ngen_eth_packets\n");
hal_set_leds(0x0, 0x3);
init_packets();
pic_register_handler(IRQ_TIMER, timer_irq_handler);
if (hwconfig_simulation_p())
timer_delta = sim_timer_delta;
hal_set_timeout(timer_delta);
ethernet_register_link_changed_callback(link_changed_callback);
ethernet_init();
/*
if (hwconfig_simulation_p()){
eth_mac->speed = 4; // hardcode mac speed to 1000
link_is_up = true;
}
*/
link_is_up = true; /* FIXME tell s/w link is up */
// fire off a receive from the ethernet
bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
while(1){
uint32_t status = buffer_pool_status->status;
if (status & (BPS_DONE(CPU_RX_BUF) | BPS_ERROR(CPU_RX_BUF))){
bp_clear_buf(CPU_RX_BUF);
// ignore incoming ethernet packets; they were looped back in sim
bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
}
if (status & (BPS_DONE(CPU_TX_BUF) | BPS_ERROR(CPU_TX_BUF))){
if (status & BPS_ERROR(CPU_TX_BUF)){
putchar('E');
}
bp_clear_buf(CPU_TX_BUF);
npackets_sent++;
if ((npackets_sent & 0xF) == 0){ // print after every 16 packets
//print_rmon_regs();
putchar('.');
}
}
if (link_is_up && send_packet_now && (status & BPS_IDLE(CPU_TX_BUF))){
send_packet_now = false;
// kick off the next packet
// FIXME set packet number in packet
bp_send_from_buf(CPU_TX_BUF, PORT_ETH, 1, 0, 255); // 1KB total
hal_toggle_leds(0x1);
}
}
hal_finish();
return 1;
}
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