mirror of
https://github.com/fairwaves/UHD-Fairwaves.git
synced 2025-10-23 07:42:00 +00:00
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/* -*- c++ -*- */
|
|
/*
|
|
* Copyright 2010 Ettus Research LLC
|
|
*
|
|
*/
|
|
|
|
//contains routines for loading programs from Flash. depends on Flash libraries.
|
|
//also contains routines for reading / writing EEPROM flags for the bootloader
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <bootloader_utils.h>
|
|
#include <spi_flash.h>
|
|
#include <i2c.h>
|
|
#include <memory_map.h>
|
|
#include <nonstdio.h>
|
|
#ifdef SPARTAN6
|
|
#include <xilinx_s6_icap.h>
|
|
#else
|
|
#include <xilinx_s3_icap.h>
|
|
#endif
|
|
#include <mdelay.h>
|
|
#include "spi.h"
|
|
|
|
#define BUTTON_PUSHED ((router_status->irqs & PIC_BUTTON) ? 0 : 1)
|
|
|
|
int is_valid_fpga_image(uint32_t addr) {
|
|
// printf("is_valid_fpga_image(): starting with addr=%x...\n", addr);
|
|
uint8_t imgbuf[64];
|
|
spi_flash_read(addr, 64, imgbuf);
|
|
//we're just looking for leading 0xFF padding, followed by the sync bytes 0xAA 0x99
|
|
for(size_t i = 0; i<63; i++) {
|
|
if(imgbuf[i] == 0xFF) continue;
|
|
if(imgbuf[i] == 0xAA && imgbuf[i+1] == 0x99) {
|
|
//printf("is_valid_fpga_image(): found valid FPGA image\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int is_valid_fw_image(uint32_t addr) {
|
|
static const uint8_t fwheader[2] = {0x0b, 0x0b}; //just lookin for a jump to anywhere located at the reset vector
|
|
uint8_t buf[2];
|
|
spi_flash_read(addr, 2, buf);
|
|
return memcmp(buf, fwheader, 2) == 0;
|
|
}
|
|
|
|
void start_program(void)
|
|
{
|
|
//ignoring the addr now
|
|
//all this does is tap that register
|
|
*((volatile uint32_t *) SR_ADDR_BLDRDONE) = 1;
|
|
}
|
|
|
|
void do_the_bootload_thing(void) {
|
|
#ifdef NO_FLASH
|
|
puts("Starting UmTRX without flash.");
|
|
return;
|
|
#else
|
|
spif_init(); //initialize SPI flash clock
|
|
|
|
puts("SPI Flash has been initialized");
|
|
|
|
bool production_image = find_safe_booted_flag();
|
|
printf("Production image = %d\n", production_image);
|
|
set_safe_booted_flag(0); //haven't booted yet
|
|
|
|
if(BUTTON_PUSHED) { //see memory_map.h
|
|
puts("Starting UmTRX in safe mode.");
|
|
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, booting..");
|
|
set_safe_booted_flag(1);
|
|
mdelay(300); //so serial output can finish
|
|
#ifdef SPARTAN6
|
|
icap_s6_reload_fpga(PROD_FPGA_IMAGE_LOCATION_ADDR, SAFE_FPGA_IMAGE_LOCATION_ADDR);
|
|
#else
|
|
icap_s3_reload_fpga(PROD_FPGA_IMAGE_LOCATION_ADDR);
|
|
#endif
|
|
}
|
|
puts("No valid production FPGA image found.\n");
|
|
return;
|
|
}
|
|
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("Starting image...");
|
|
mdelay(300);
|
|
start_program();
|
|
puts("ERROR: Return from main!");
|
|
//if this happens, though, the safest thing to do is reboot the whole FPGA and start over.
|
|
mdelay(300);
|
|
#ifdef SPARTAN6
|
|
icap_s6_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR, SAFE_FPGA_IMAGE_LOCATION_ADDR);
|
|
#else
|
|
icap_s3_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR);
|
|
#endif
|
|
return;
|
|
}
|
|
puts("No valid production firmware found!");
|
|
#endif
|
|
}
|