/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2012, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ----------------------------------------------------------------------------
 */

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include "board.h"
#include "board_memories.h"
#include <pmc/pmc.h>

//------------------------------------------------------------------------------
//         Internal functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Default spurious interrupt handler. Infinite loop.
//------------------------------------------------------------------------------
void defaultSpuriousHandler( void )
{
    while (1);
}

//------------------------------------------------------------------------------
/// Default handler for fast interrupt requests. Infinite loop.
//------------------------------------------------------------------------------
void defaultFiqHandler( void )
{
    while (1);
}

//------------------------------------------------------------------------------
/// Default handler for standard interrupt requests. Infinite loop.
//------------------------------------------------------------------------------
void defaultIrqHandler( void )
{
    while (1);
}


//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
///    Performs the low-level initialization of the chip.
//------------------------------------------------------------------------------
void LowLevelInit(unsigned int clockConfigEnable)
{
    unsigned char i;
    pllConfiguration pll;
    mckrConfiguration mckr;

    if (clockConfigEnable)
    {
        // Switch MCK to Slow clock 
        PMC_SwitchMck2SlowClock();
        //  enable Main oscillator 
        PMC_EnableMainOsc();
        // Then, cofigure PLLA and switch clock
        // MCK = 16.367660MHz * 88 / 15 /1 / 2 = 48MHz -> 0x10483F0E 
        pll.mul = 0x58;  pll.div = 0x0F; pll.usbdiv = 0; pll.pllout = 0;
        mckr.prescaler = AT91C_PMC_PRES_CLK; mckr.mdiv = AT91C_PMC_MDIV_2; mckr.plldiv2 = 0;
        PMC_ConfigureMckWithPlla(&pll, &mckr);
    }
    /* Initialize AIC
     ****************/
    AT91C_BASE_AIC->AIC_IDCR = 0xFFFFFFFF;
    AT91C_BASE_AIC->AIC_SVR[0] = (unsigned int) defaultFiqHandler;
    for (i = 1; i < 31; i++) {

        AT91C_BASE_AIC->AIC_SVR[i] = (unsigned int) defaultIrqHandler;
    }
    AT91C_BASE_AIC->AIC_SPU = (unsigned int) defaultSpuriousHandler;

    // Unstack nested interrupts
    for (i = 0; i < 8 ; i++) {

        AT91C_BASE_AIC->AIC_EOICR = 0;
    }

    /* Watchdog initialization
     *************************/
    AT91C_BASE_WDTC->WDTC_WDMR = AT91C_WDTC_WDDIS;

    /* Remap
     *******/
    BOARD_RemapRam();

    // Disable RTT and PIT interrupts (potential problem when program A
    // configures RTT, then program B wants to use PIT only, interrupts
    // from the RTT will still occur since they both use AT91C_ID_SYS)
    AT91C_BASE_RTTC0->RTTC_RTMR &= ~(AT91C_RTTC_ALMIEN | AT91C_RTTC_RTTINCIEN);
    AT91C_BASE_RTTC1->RTTC_RTMR &= ~(AT91C_RTTC_ALMIEN | AT91C_RTTC_RTTINCIEN);
    AT91C_BASE_PITC->PITC_PIMR &= ~AT91C_PITC_PITIEN;
#if defined(norflash)
    BOARD_ConfigureNorFlash(BOARD_NORFLASH_DFT_BUS_SIZE);
#endif
}

