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/* -*- c -*- */
/*
* Copyright 2009 Ettus Research LLC
*
* 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 <hal_io.h>
#include <nonstdio.h>
#include <mdelay.h>
#include <spi_flash.h>
#include <quadradio/flashdir.h>
#include <quadradio/simple_binary_format.h>
#include <stdlib.h>
void hal_uart_init(void);
void spif_init(void);
void pic_interrupt_handler() __attribute__ ((interrupt_handler));
void pic_interrupt_handler()
{
// nop stub
}
static void
error(int e)
{
putstr("ERR");
puthex8(e);
newline();
}
static void
load(uint32_t flash_addr, uint32_t ram_addr, uint32_t size)
{
spi_flash_read(flash_addr, size, (void *) ram_addr);
}
static bool
load_from_slot(const struct flashdir *fd, int fw_slot)
{
putstr("Loading f/w image ");
putchar('0' + fw_slot);
putstr("... ");
if (fw_slot >= fd->fw_nslots){
error(1);
return false;
}
int slot = fw_slot + fd->fw_slot0;
if (fd->slot[slot].start == 0 || fd->slot[slot].start == 0xffff
|| fd->slot[slot].len == 0 || fd->slot[slot].len == 0xffff){
error(2);
return false;
}
uint32_t sbf_base = fd->slot[slot].start << spi_flash_log2_sector_size();
uint32_t sbf_len = fd->slot[slot].len << spi_flash_log2_sector_size();
uint32_t sbf_offset = 0;
struct sbf_header sbf;
spi_flash_read(sbf_base, sizeof(struct sbf_header), &sbf);
if (sbf.magic != SBF_MAGIC || sbf.nsections > SBF_MAX_SECTIONS){
error(3);
return false;
}
sbf_offset += sizeof(struct sbf_header);
unsigned int i;
for (i = 0; i < sbf.nsections; i++){
if (sbf_offset + sbf.sec_desc[i].length > sbf_len){
error(4);
return false;
}
load(sbf_offset + sbf_base,
sbf.sec_desc[i].target_addr,
sbf.sec_desc[i].length);
sbf_offset += sbf.sec_desc[i].length;
}
putstr("Done!");
typedef void (*fptr_t)(void);
(*(fptr_t) sbf.entry)(); // almost certainly no return
return true;
}
int
main(int argc, char **argv)
{
hal_uart_init();
spif_init();
sr_leds->leds = 0;
mdelay(100);
sr_leds->leds = ~0;
mdelay(100);
sr_leds->leds = 0;
putstr("\n>>> spi_bootloader <<<\n");
const struct flashdir *fd = get_flashdir();
if (fd == 0)
abort();
while(1){
int sw;
int fw_slot;
sw = readback->switches;
fw_slot = sw & 0x7;
if (!load_from_slot(fd, fw_slot)){
if (fw_slot != 0){
putstr("Falling back to slot 0\n");
load_from_slot(fd, 0);
}
}
}
}
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