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/* -*- c++ -*- */
/*
* Copyright 2010 Ettus Research LLC
*
*/
//#include <stdio.h>
#include <stdlib.h>
#include <memory_map.h>
#include <nonstdio.h>
#include <hal_io.h>
#include <hal_uart.h>
#include <xilinx_s3_icap.h>
#include <spi_flash.h>
#include <spi_flash_private.h>
//#include <clocks.h>
#include <ihex.h>
#include <bootloader_utils.h>
//uses UART to load files to Flash in Intel HEX 16-bit format.
//this is one example of a "safe" firmware image to be loaded by a bootloader into main RAM.
//this CANNOT write to main RAM, since it is resident there.
//Sector 0-31: Safe FPGA bootloader image
//Sector 32-63: Production bootloader image
//Sector 64: Production firmware image
//Sector 127: Safe firmware image
void uart_flash_loader(void) {
char buf[256]; //input data buffer
uint8_t ihx[32]; //ihex data buffer
uint32_t slot_offset = PROD_FW_IMAGE_LOCATION_ADDR; //initial slot offset to program to.
uint32_t extended_addr = 0x00000000; //extended Intel hex segment address
size_t sector_size = spi_flash_log2_sector_size();
ihex_record_t ihex_record;
ihex_record.data = ihx;
int i;
//not gonna win a turing prize for my C text parsing
while(1) {
gets(buf);
if(!strncmp(buf, "!SECTORSIZE", 7)) { //return the sector size in log format
putstr("OK ");
puthex8((uint32_t) sector_size); //err, this should probably be decimal for human readability. we do have itoa now...
putstr("\n");
}
else if(!strncmp(buf, "!SETADDR", 7)) { //set start address for programming
slot_offset = atol(&buf[8]);
puts("OK");
// puthex32(slot_offset);
// putstr("\n");
}
else if(!strncmp(buf, "!ERASE", 6)) { //erase a sector
uint32_t sector = atol(&buf[6]);
uint32_t size = 2 << (sector_size-1);
uint32_t addr = sector << sector_size;
spi_flash_erase(addr, size); //we DO NOT implement write protection here. it is up to the HOST PROGRAM to not issue an ERASE unless it means it.
//unfortunately the Flash cannot write-protect the segments that really matter, so we only use global write-protect
//as a means of avoiding accidental writes from runaway code / garbage on the SPI bus.
puts("OK");
}
//can't exactly run firmware if you're already executing out of main RAM
/* else if(!strncmp(buf, "!RUNSFW", 7)) {
if(is_valid_fw_image(SAFE_FW_IMAGE_LOCATION_ADDR)) {
puts("OK");
spi_flash_read(SAFE_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE);
start_program(RAM_BASE);
} else {
puts("NOK");
}
}
else if(!strncmp(buf, "!RUNPFW", 7)) {
if(is_valid_fw_image(PROD_FW_IMAGE_LOCATION_ADDR)) {
puts("OK");
spi_flash_read(PROD_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES-1, (void *)RAM_BASE);
start_program(RAM_BASE);
} else {
puts("NOK");
}
}
*/
else if(!strncmp(buf, "!RUNPFPGA", 8)) {
if(is_valid_fpga_image(PROD_FPGA_IMAGE_LOCATION_ADDR)) {
puts("OK");
//icap_reload_fpga(PROD_FPGA_IMAGE_LOCATION_ADDR);
} else {
puts("NOK");
}
}
else if(!strncmp(buf, "!RUNSFPGA", 8)) {
if(is_valid_fpga_image(SAFE_FPGA_IMAGE_LOCATION_ADDR)) {
puts("OK");
//icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR);
} else {
puts("NOK");
}
}
else if(!strncmp(buf, "!READ", 5)) {
uint32_t addr = atol(&buf[5]);
spi_flash_read(addr, 16, ihx);
for(i=0; i < 16; i++) {
puthex8(ihx[i]);
}
putstr("\n");
}
else if(!ihex_parse(buf, &ihex_record)) { //last, try to see if the input was a valid IHEX line
switch (ihex_record.type) {
case 0:
spi_flash_program(ihex_record.addr + slot_offset + extended_addr, ihex_record.length, ihex_record.data);
puts("OK");
break;
case 1:
//here we would expect a CRC checking or something else to take place. for now we do nothing.
//well, we set the extended segment addr back to 0
extended_addr = 0;
puts("DONE");
break;
case 4:
//set the upper 16 bits of the address
extended_addr = ((ihex_record.data[0] << 8) + ihex_record.data[1]) << 16;
puts("OK");
break;
default:
puts("NOK");
}
}
else puts("NOK");
} //while(1)
}
void delay(uint32_t t) {
while(t-- != 0) asm("NOP");
}
int main(int argc, char *argv[]) {
uint8_t buf[32];
int i = 0;
hal_disable_ints(); // In case we got here via jmp 0x0
// delay(10000000);
//before anything else you might want to blinkenlights just to indicate code startup to the user.
hal_uart_init();
spif_init();
// i2c_init(); //for EEPROM
puts("USRP2+ UART firmware loader");
// puts("Debug: loading production image, 10 bytes.");
// spi_flash_read(PROD_FW_IMAGE_LOCATION_ADDR, 10, buf);
// for(i=0; i < 10; i++) {
// puthex8(buf[i]);
// }
uart_flash_loader();
//shouldn't get here. should reboot.
puts("shit happened.\n");
return 0;
}
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