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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/>.
*/
#include "u2_init.h"
#include "memory_map.h"
#include "spi.h"
#include "hal_io.h"
#include "buffer_pool.h"
#include "pic.h"
#include <stdbool.h>
#include "ethernet.h"
#include "nonstdio.h"
#include "u2_eth_packet.h"
#include "memcpy_wa.h"
#include <stddef.h>
#include <stdlib.h>
// ----------------------------------------------------------------
unsigned char dst_mac_addr[6] = {
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 = MASTER_CLK_RATE/1000; // tick at 1kHz
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;
// ----------------------------------------------------------------
// debugging output on tx pins
#define LS_MASK 0xE0000
#define LS_1000 0x80000
#define LS_100 0x40000
#define LS_10 0x20000
/*
* Called when eth phy state changes (w/ interrupts disabled)
*/
void
link_changed_callback(int speed)
{
int v = 0;
switch(speed){
case 10:
v = LS_10;
link_is_up = true;
break;
case 100:
v = LS_100;
link_is_up = true;
break;
case 1000:
v = LS_100;
link_is_up = true;
break;
default:
v = 0;
link_is_up = false;
break;
}
hal_gpio_set_tx(v, LS_MASK); /* set debug bits on d'board */
putstr("\neth link changed: speed = ");
puthex16_nl(speed);
}
void
timer_irq_handler(unsigned irq)
{
hal_set_timeout(timer_delta); // schedule next timeout
send_packet_now = 1;
}
void
buffer_irq_handler(unsigned irq)
{
// FIXME
}
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)
{
int i;
u2_eth_packet_t pkt __attribute__((aligned (4)));
for (i = 0; i < 6; i++){
pkt.ehdr.dst.addr[i] = dst_mac_addr[i];
}
pkt.ehdr.src = *ethernet_mac_addr();
pkt.ehdr.ethertype = U2_ETHERTYPE;
// fill ALL buffers for debugging
for (i = 0; i < 8; i++)
init_packet((void *)buffer_ram(i), &pkt, i);
}
static int led_counter = 0;
int
main(void)
{
int send_pause = 1;
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");
// Control LEDs
output_regs->leds = 0x00;
init_packets();
// pic_register_handler(IRQ_BUFFER, buffer_irq_handler); // poll for now
pic_register_handler(IRQ_TIMER, timer_irq_handler);
hal_set_timeout(timer_delta);
ethernet_register_link_changed_callback(link_changed_callback);
ethernet_init();
eth_mac->pause_frame_send_en = 1;
eth_mac->pause_quanta_set = 16384 / 512;
// eth_mac->speed = 4; // FIXME hardcode mac speed to 1000
while(1){
if (link_is_up && send_packet_now){
send_packet_now = false;
if (send_pause)
eth_mac->xon_cpu = 1;
else
eth_mac->xon_cpu = 0;
send_pause ^= 1;
// kick off the next packet
// FIXME set packet number in packet
#if 0
bp_send_from_buf(0, PORT_ETH, 1, 0, 255); // 1KB total
while ((buffer_pool_status->status & (BPS_DONE_0|BPS_ERROR_0)) == 0)
;
bp_clear_buf(0);
#endif
output_regs->leds = ((++led_counter) & 0x1) | (link_is_up ? 0x2 : 0x0);
}
}
hal_finish();
return 1;
}
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