/**
 *******************************************************************************
 * @file    sleep.c
 * @brief Implementation of an sleep functionality
 * @internal
 * @author  ON Semiconductor
 * $Rev:  0.1 $
 * $Date: 01-21-2016 $
 ******************************************************************************
 * Copyright 2016 Semiconductor Components Industries LLC (d/b/a “ON Semiconductor”).
 * All rights reserved.  This software and/or documentation is licensed by ON Semiconductor
 * under limited terms and conditions.  The terms and conditions pertaining to the software
 * and/or documentation are available at http://www.onsemi.com/site/pdf/ONSEMI_T&C.pdf
 * (“ON Semiconductor Standard Terms and Conditions of Sale, Section 8 Software”) and
 * if applicable the software license agreement.  Do not use this software and/or
 * documentation unless you have carefully read and you agree to the limited terms and
 * conditions.  By using this software and/or documentation, you agree to the limited
 * terms and conditions.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 * ON SEMICONDUCTOR SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 * @endinternal
 *
 * @ingroup sleep
 *
 * @details
 * Sleep implementation
 *
 */
#if DEVICE_SLEEP
#include "sleep.h"
#include "sleep_api.h"
#include "cmsis_nvic.h"

#define ENABLE          (uint8_t)0x01
#define DISABLE         (uint8_t)0x00
#define MAC_LUT_SIZE    (uint8_t)96

#define portNVIC_SYSTICK_CTRL_REG           ( * ( ( volatile unsigned long * ) 0xe000e010 ) )
#define portNVIC_SYSTICK_CLK_BIT            ( 1UL << 2UL )
#define portNVIC_SYSTICK_INT_BIT            ( 1UL << 1UL )
#define portNVIC_SYSTICK_ENABLE_BIT         ( 1UL << 0UL )

void sleep(void)
{
    /** Unset SLEEPDEEP (SCR) and COMA to select sleep mode */
    SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
    PMUREG->CONTROL.BITS.ENCOMA = DISABLE;

    /* Enter into sleep mode */
    __ISB();
    __WFI();
}

void deepsleep(void)
{
    /** Set SLEEPDEEP (SCR) and unset COMA to select deep sleep mode */
    SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
    PMUREG->CONTROL.BITS.ENCOMA = DISABLE;

    /** Enter into deep sleep mode */
    __ISB();
    __WFI();

    /** Wait for the external 32MHz to be power-ed up & running
     * Re-power down the 32MHz internal osc
     */
    while (!CLOCKREG->CSR.BITS.XTAL32M);
    PMUREG->CONTROL.BITS.INT32M = 1;
}

void coma(void)
{
    /** Set SLEEPDEEP (SCR) and set COMA to select coma mode */
    SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
    PMUREG->CONTROL.BITS.ENCOMA = ENABLE;

    /* TODO Wait till MAC is idle */
    //        while((MACHWREG->SEQUENCER == MACHW_SEQ_TX) || (MACHWREG->SEQUENCER == MACHW_SEQ_ED) || (MACHWREG->SEQUENCER == MACHW_SEQ_CCA));

    /* TODO Back up MAC_LUT *
    uint8_t MAC_LUT_BackUp[MAC_LUT_SIZE];
    fMacBackupFrameStoreLUT(MAC_LUT_BackUp); */

    /* Disable UART 1 & 2 FIFO during coma*/
    UART1REG->FCR.WORD &= ~(FCR_FIFO_ENABLE);
    UART2REG->FCR.WORD &= ~(FCR_FIFO_ENABLE);

    /** Enter into coma mode */
    __ISB();
    __WFI();

    /** Wait for the external 32MHz to be power-ed up & running
     * Re-power down the 32MHz internal osc
     */
    while (!CLOCKREG->CSR.BITS.XTAL32M);
    PMUREG->CONTROL.BITS.INT32M = 1;

    /** Trim the oscillators */
    if ((TRIMREG->TRIM_32K_EXT & 0xFFFF0000) != 0xFFFF0000) {
        CLOCKREG->TRIM_32K_EXT = TRIMREG->TRIM_32K_EXT;
    }
    if ((TRIMREG->TRIM_32M_EXT & 0xFFFF0000) != 0xFFFF0000) {
        CLOCKREG->TRIM_32M_EXT = TRIMREG->TRIM_32M_EXT;
    }

    /* Enable UART 1 & 2 FIFO */
    UART1REG->FCR.WORD |= FCR_FIFO_ENABLE;
    UART2REG->FCR.WORD |= FCR_FIFO_ENABLE;

    /* TODO Restore MAC_LUT *
    fMacRestoreFrameStoreLUT(MAC_LUT_BackUp);  */
}

#endif /* DEVICE_SLEEP */