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//
// Copyright 2010-2011 Ettus Research LLC
//
/*
* Copyright 2007,2008 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 <lwip/ip.h>
#include <lwip/udp.h>
#include "u2_init.h"
#include "memory_map.h"
#include "spi.h"
#include "hal_io.h"
#include "pic.h"
#include <stdbool.h>
#include "ethernet.h"
#include "nonstdio.h"
#include <net/padded_eth_hdr.h>
#include <net_common.h>
#include "memcpy_wa.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "clocks.h"
#include "usrp2/fw_common.h"
#include <i2c.h>
#include <ethertype.h>
#include <arp_cache.h>
#include "udp_fw_update.h"
#include "pkt_ctrl.h"
#include "banal.h"
#include <bootloader_utils.h>
#include <spi_flash.h>
#include <xilinx_s3_icap.h>
#include <mdelay.h>
#define BUTTON_PUSHED ((router_status->irqs & PIC_BUTTON) ? 0 : 1)
static void handle_inp_packet(uint32_t *buff, size_t num_lines){
//test if its an ip recovery packet
typedef struct{
padded_eth_hdr_t eth_hdr;
char code[4];
union {
struct ip_addr ip_addr;
} data;
}recovery_packet_t;
recovery_packet_t *recovery_packet = (recovery_packet_t *)buff;
if (recovery_packet->eth_hdr.ethertype == 0xbeee && strncmp(recovery_packet->code, "addr", 4) == 0){
printf("Got ip recovery packet: "); print_ip_addr(&recovery_packet->data.ip_addr); newline();
set_ip_addr(&recovery_packet->data.ip_addr);
return;
}
//pass it to the slow-path handler
handle_eth_packet(buff, num_lines);
}
//------------------------------------------------------------------
/*
* Called when eth phy state changes (w/ interrupts disabled)
*/
void link_changed_callback(int speed){
printf("\neth link changed: speed = %d\n", speed);
if (speed != 0){
hal_set_leds(LED_RJ45, LED_RJ45);
pkt_ctrl_set_routing_mode(PKT_CTRL_ROUTING_MODE_MASTER);
send_gratuitous_arp();
}
else{
hal_set_leds(0x0, LED_RJ45);
pkt_ctrl_set_routing_mode(PKT_CTRL_ROUTING_MODE_SLAVE);
}
}
static void do_the_bootload_thing(void) {
bool production_image = find_safe_booted_flag();
set_safe_booted_flag(0); //haven't booted yet
if(BUTTON_PUSHED) { //see memory_map.h
puts("Starting USRP2+ in safe mode. I am a brick. Feel free to reprogram me via the UDP burner.");
return;
//no longer necessary since we can just burn from UDP via the bootloader now
/*
if(is_valid_fw_image(SAFE_FW_IMAGE_LOCATION_ADDR)) {
set_safe_booted_flag(1); //let the firmware know it's the safe image
spi_flash_read(SAFE_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE);
start_program();
puts("ERROR: return from main program! This should never happen!");
icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR);
} else {
puts("ERROR: no safe firmware image available. I am a brick. Feel free to reprogram me via the UDP burner.");
return;
}
*/
}
if(!production_image) {
puts("Checking for valid production FPGA image...");
if(is_valid_fpga_image(PROD_FPGA_IMAGE_LOCATION_ADDR)) {
puts("Valid production FPGA image found. Attempting to boot.");
set_safe_booted_flag(1);
mdelay(300); //so serial output can finish
icap_reload_fpga(PROD_FPGA_IMAGE_LOCATION_ADDR);
}
puts("No valid production FPGA image found.\nAttempting to load production firmware...");
}
if(is_valid_fw_image(PROD_FW_IMAGE_LOCATION_ADDR)) {
puts("Valid production firmware found. Loading...");
spi_flash_read(PROD_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE);
puts("Finished loading. Starting image.");
mdelay(300);
start_program();
puts("ERROR: Return from main program! This should never happen!");
//if this happens, though, the safest thing to do is reboot the whole FPGA and start over.
mdelay(300);
icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR);
return;
}
puts("No valid production firmware found. Trying safe firmware...");
if(is_valid_fw_image(SAFE_FW_IMAGE_LOCATION_ADDR)) {
spi_flash_read(SAFE_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE);
puts("Finished loading. Starting image.");
mdelay(300);
start_program();
puts("ERROR: return from main program! This should never happen!");
mdelay(300);
icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR);
return;
}
puts("ERROR: no safe firmware image available. I am a brick. Feel free to reprogram me via the UDP burner.");
}
int
main(void)
{
u2_init();
spif_init();
set_default_mac_addr();
set_default_ip_addr();
putstr("\nN210 bootloader, UDP edition\n");
print_mac_addr(ethernet_mac_addr()); newline();
print_ip_addr(get_ip_addr()); newline();
printf("FPGA compatibility number: %d\n", USRP2_FPGA_COMPAT_NUM);
printf("Firmware compatibility number: %d\n", USRP2_FW_COMPAT_NUM);
do_the_bootload_thing();
//if we reach this point, the bootloader has fallen through, so we initalize the UDP handler for updating
//1) register the addresses into the network stack
//TODO: make this a fixed IP address, don't depend on EEPROM
register_addrs(ethernet_mac_addr(), get_ip_addr());
pkt_ctrl_program_inspector(get_ip_addr(), USRP2_UDP_DSP0_PORT);
//2) register callbacks for udp ports we service
init_udp_listeners();
register_udp_listener(USRP2_UDP_UPDATE_PORT, handle_udp_fw_update_packet);
pkt_ctrl_set_routing_mode(PKT_CTRL_ROUTING_MODE_SLAVE);
//4) setup ethernet hardware to bring the link up
ethernet_register_link_changed_callback(link_changed_callback);
ethernet_init();
while(true){
size_t num_lines;
void *buff = pkt_ctrl_claim_incoming_buffer(&num_lines);
if (buff != NULL){
handle_inp_packet((uint32_t *)buff, num_lines);
pkt_ctrl_release_incoming_buffer();
}
pic_interrupt_handler();
}
}
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