/*
 *  spreadspace avr utils
 *
 *
 *  Copyright (C) 2012 Christian Pointner <equinox@spreadspace.org>
 *
 *  This file is part of spreadspace avr utils.
 *
 *  spreadspace avr utils 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
 *  any later version.
 *
 *  spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
 */

#include <avr/interrupt.h>
#include <avr/io.h>
#include <util/delay.h>

#include "util.h"

#if defined(CLKPR)
#define CPU_PRESCALE(n) do { CLKPR = 0x80; CLKPR = (n); } while(0)
#else
#define CPU_PRESCALE(n)
#endif

void cpu_init(void)
{
  CPU_PRESCALE(0);
}

#if defined(__BOARD_teensy1__)
  #define BOOTLOADER_VEC 0x3E00
#elif defined(__BOARD_teensy2__)
  #define BOOTLOADER_VEC 0x7E00
#elif defined(__BOARD_teensy1pp__)
  #define BOOTLOADER_VEC 0xFC00
#elif defined(__BOARD_teensy2pp__)
  #define BOOTLOADER_VEC 0x1FC00
#elif defined(__BOARD_minimus__)
  #define BOOTLOADER_VEC 0x3000
#elif defined(__BOARD_minimus32__)
  #define BOOTLOADER_VEC 0x3800
#elif defined(__BOARD_hhd70dongle__)
  #define BOOTLOADER_VEC 0x3800
#else
  #define BOOTLOADER_VEC 0x0000
#endif

typedef void (*f_ptr_type)(void);
f_ptr_type start_bootloader = (f_ptr_type)BOOTLOADER_VEC;

void reset2bootloader(void)
{
#if defined(__BOARD_teensy1__) || defined(__BOARD_teensy1pp__) || defined(__BOARD_teensy2__) || defined(__BOARD_teensy2pp__) || \
    defined(__BOARD_hhd70dongle__) || defined(__BOARD_minimus__) || defined(__BOARD_minimus32__)
  cli();
  // disable watchdog, if enabled
  // disable all peripherals
  UDCON = 1;
  USBCON = (1<<FRZCLK);  // disable USB
  UCSR1B = 0;
  _delay_ms(5);
  #if defined(__BOARD_teensy1__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
    TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
    DDRB = 0; DDRC = 0; DDRD = 0;
    PORTB = 0; PORTC = 0; PORTD = 0;
  #elif defined(__BOARD_teensy2__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
    TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
    DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
    PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
  #elif defined(__BOARD_teensy1pp__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
    DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
    PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
  #elif defined(__BOARD_teensy2pp__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
    DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
    PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
  #elif defined(__BOARD_minimus__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
    TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
    DDRB = 0; DDRC = 0; DDRD = 0;
    PORTB = 0; PORTC = 0; PORTD = 0;
  #elif defined(__BOARD_minimus32__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
    TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
    DDRB = 0; DDRC = 0; DDRD = 0;
    PORTB = 0; PORTC = 0; PORTD = 0;
  #elif defined(__BOARD_hhd70dongle__)
    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
    TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
    DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
    PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
  #endif
  start_bootloader();
#endif
}