circuitpython/ports/cc3200/hal/prcm.c

//*****************************************************************************
//
//  prcm.c
//
//  Driver for the Power, Reset and Clock Module (PRCM)
//
//  Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
//
//
//  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 following disclaimer.
//
//    Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the
//    distribution.
//
//    Neither the name of Texas Instruments Incorporated nor the names of
//    its contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
//  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
//  OWNER OR CONTRIBUTORS 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.
//
//*****************************************************************************

//*****************************************************************************
//
//! \addtogroup PRCM_Power_Reset_Clock_Module_api
//! @{
//
//*****************************************************************************

#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_apps_rcm.h"
#include "inc/hw_gprcm.h"
#include "inc/hw_hib1p2.h"
#include "inc/hw_hib3p3.h"
#include "prcm.h"
#include "interrupt.h"
#include "cpu.h"
#include "utils.h"
#include "rom_map.h"


//*****************************************************************************
// Macro definition
//*****************************************************************************
#define PRCM_SOFT_RESET           0x00000001
#define PRCM_ENABLE_STATUS        0x00000002
#define SYS_CLK                   80000000
#define XTAL_CLK                  40000000


//*****************************************************************************
//    CC3200 does not have a true RTC capability. However, API(s) in this file
//    provide an effective mechanism to support RTC feature in the device.
//
//    The implementation to support RTC has been kept very simple. A set of
//    HIB Memory Registers in conjunction with Slow Clock Counter are used
//    to render RTC information to users. Core principle of design involves
//    two steps (a) establish an association between user provided wall-clock
//    and slow clock counter. (b) store reference value of this associattion
//    in HIB Registers. This reference value and SCC value are then combined
//    to create real-world calendar time.
//
//    Across HIB cycles, value stored in HIB Registers is retained and slow
//    clock counter continues to tick, thereby, this arragement is relevant
//    and valid as long as device has a (tickle) battery power.
//
//    Further, provision also has been made to set an alarm. When it RTC value
//    matches that of set for alarm, an interrupt is generated.
//
//    HIB MEM REG0 and REG1 are reserved for TI.
//
//    If RTC feature is not used, then HIB REG2 & REG3 are available to user.
//
//    Lower half of REG0 is used for TI HW ECO.
//*****************************************************************************
#define RTC_U64MSEC_MK(u32Secs, u16Msec) (((unsigned long long)u32Secs << 10)|\
                                          (u16Msec & 0x3FF))

#define RTC_SECS_IN_U64MSEC(u64Msec)     ((unsigned long)(u64Msec  >>   10))
#define RTC_MSEC_IN_U64MSEC(u64Msec)     ((unsigned short)(u64Msec & 0x3FF))

#define RTC_MSEC_U32_REG_ADDR            (HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG2)
#define RTC_SECS_U32_REG_ADDR            (HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG3)

//*****************************************************************************
// Register Access and Updates
//
// Tick of SCC has a resolution of 32768Hz, meaning 1 sec is equal to 32768
// clock ticks. Ideal way of getting time in millisecond will involve floating
// point arithmetic (division by 32.768). To avoid this, we simply divide it by
// 32, which will give a range from 0 -1023(instead of 0-999). To use this
// output correctly we have to take care of this inaccuracy externally.
// following wrapper can be used to convert the value from cycles to
// millisecond:
//
// CYCLES_U16MS(cycles) ((cycles * 1000) / 1024),
//
// Similarly, before setting the value, it must be first converted (from ms to
// cycles).
//
// U16MS_CYCLES(msec)   ((msec * 1024) / 1000)
//
// Note: There is a precision loss of 1 ms with the above scheme.
//
//
#define SCC_U64MSEC_GET()                (RTCFastDomainCounterGet() >> 5)
#define SCC_U64MSEC_MATCH_SET(u64Msec)   (MAP_PRCMSlowClkCtrMatchSet(u64Msec << 5))
#define SCC_U64MSEC_MATCH_GET()          (MAP_PRCMSlowClkCtrMatchGet() >> 5)

//*****************************************************************************
//
// Bit:  31 is used to indicate use of RTC. If set as '1', RTC feature is used.
// Bit:  30 is used to indicate that a safe boot should be performed.
// bit:  29 is used to indicate that the last reset was caused by the WDT.
// bit:  28 is used to indicate that the board is booting for the first time after being programmed in factory.
// Bits: 27 and 26 are unused.
// Bits: 25 to 16 are used to save millisecond part of RTC reference.
// Bits: 15 to 0 are being used for HW Changes / ECO.
//
//*****************************************************************************

//*****************************************************************************
// Set RTC USE Bit
//*****************************************************************************
static void RTCUseSet(void)
{
  unsigned int uiRegValue;

  uiRegValue = MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) | (1 << 31);

  PRCMHIBRegWrite(RTC_MSEC_U32_REG_ADDR, uiRegValue);
}

//*****************************************************************************
// Clear RTC USE Bit
//*****************************************************************************
static void RTCUseClear(void)
{
  unsigned int uiRegValue;

  uiRegValue = MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) & (~(1 << 31));

  PRCMHIBRegWrite(RTC_MSEC_U32_REG_ADDR, uiRegValue);
}

//*****************************************************************************
// Checks if RTC-USE bit is set
//*****************************************************************************
static tBoolean IsRTCUsed(void)
{
  return (MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) & (1 << 31)) ? true : false;
}

//*****************************************************************************
// Read 16-bit mSecs
//*****************************************************************************
static unsigned short RTCU32MSecRegRead(void)
{
  return ((MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) >> 16) & 0x03FF);
}

//*****************************************************************************
// Write 16-bit mSecs
//*****************************************************************************
static void RTCU32MSecRegWrite(unsigned int u32Msec)
{
   unsigned int uiRegValue;

   // read the whole register and clear the msec bits
   uiRegValue = MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) & (~(0x03FF << 16));

   // write the msec bits only
   MAP_PRCMHIBRegWrite(RTC_MSEC_U32_REG_ADDR, uiRegValue | ((u32Msec & 0x03FF) << 16));
}

//*****************************************************************************
// Read 32-bit Secs
//*****************************************************************************
static unsigned long RTCU32SecRegRead(void)
{
  return (MAP_PRCMHIBRegRead(RTC_SECS_U32_REG_ADDR));
}

//*****************************************************************************
// Write 32-bit Secs
//*****************************************************************************
static void RTCU32SecRegWrite(unsigned long u32Msec)
{
  MAP_PRCMHIBRegWrite(RTC_SECS_U32_REG_ADDR, u32Msec);
}

//*****************************************************************************
// Fast function to get the most accurate RTC counter value
//*****************************************************************************
static unsigned long long RTCFastDomainCounterGet (void) {

    #define BRK_IF_RTC_CTRS_ALIGN(c2, c1)       if (c2 - c1 <= 1) {     \
                                                    itr++;              \
                                                    break;              \
                                                }

    unsigned long long rtc_count1, rtc_count2, rtc_count3;
    unsigned int itr;

    do {
        rtc_count1 = PRCMSlowClkCtrFastGet();
        rtc_count2 = PRCMSlowClkCtrFastGet();
        rtc_count3 = PRCMSlowClkCtrFastGet();
        itr = 0;

        BRK_IF_RTC_CTRS_ALIGN(rtc_count2, rtc_count1);
        BRK_IF_RTC_CTRS_ALIGN(rtc_count3, rtc_count2);
        BRK_IF_RTC_CTRS_ALIGN(rtc_count3, rtc_count1);

        // Consistent values in two consecutive reads implies a correct
        // value of the counter. Do note, the counter does not give the
        // calendar time but a hardware that ticks upwards continuously.
        // The 48-bit counter operates at 32,768 HZ.

    } while (true);

    return (1 == itr) ? rtc_count2 : rtc_count3;
}

//*****************************************************************************
// Macros
//*****************************************************************************
#define IS_RTC_USED()                   IsRTCUsed()
#define RTC_USE_SET()                   RTCUseSet()
#define RTC_USE_CLR()                   RTCUseClear()

#define RTC_U32MSEC_REG_RD()            RTCU32MSecRegRead()
#define RTC_U32MSEC_REG_WR(u32Msec)     RTCU32MSecRegWrite(u32Msec)

#define RTC_U32SECS_REG_RD()            RTCU32SecRegRead()
#define RTC_U32SECS_REG_WR(u32Secs)     RTCU32SecRegWrite(u32Secs)

#define SELECT_SCC_U42BITS(u64Msec)     (u64Msec & 0x3ffffffffff)

//*****************************************************************************
// Global Peripheral clock and rest Registers
//*****************************************************************************
static const PRCM_PeriphRegs_t PRCM_PeriphRegsList[] =
{

	{APPS_RCM_O_CAMERA_CLK_GATING,   APPS_RCM_O_CAMERA_SOFT_RESET   },
	{APPS_RCM_O_MCASP_CLK_GATING,    APPS_RCM_O_MCASP_SOFT_RESET    },
	{APPS_RCM_O_MMCHS_CLK_GATING,    APPS_RCM_O_MMCHS_SOFT_RESET    },
	{APPS_RCM_O_MCSPI_A1_CLK_GATING, APPS_RCM_O_MCSPI_A1_SOFT_RESET },
	{APPS_RCM_O_MCSPI_A2_CLK_GATING, APPS_RCM_O_MCSPI_A2_SOFT_RESET },
	{APPS_RCM_O_UDMA_A_CLK_GATING,   APPS_RCM_O_UDMA_A_SOFT_RESET   },
	{APPS_RCM_O_GPIO_A_CLK_GATING,   APPS_RCM_O_GPIO_A_SOFT_RESET   },
	{APPS_RCM_O_GPIO_B_CLK_GATING,   APPS_RCM_O_GPIO_B_SOFT_RESET   },
	{APPS_RCM_O_GPIO_C_CLK_GATING,   APPS_RCM_O_GPIO_C_SOFT_RESET   },
	{APPS_RCM_O_GPIO_D_CLK_GATING,   APPS_RCM_O_GPIO_D_SOFT_RESET   },
	{APPS_RCM_O_GPIO_E_CLK_GATING,   APPS_RCM_O_GPIO_E_SOFT_RESET   },
	{APPS_RCM_O_WDOG_A_CLK_GATING,   APPS_RCM_O_WDOG_A_SOFT_RESET   },
	{APPS_RCM_O_UART_A0_CLK_GATING,  APPS_RCM_O_UART_A0_SOFT_RESET  },
	{APPS_RCM_O_UART_A1_CLK_GATING,  APPS_RCM_O_UART_A1_SOFT_RESET  },
	{APPS_RCM_O_GPT_A0_CLK_GATING ,  APPS_RCM_O_GPT_A0_SOFT_RESET   },
	{APPS_RCM_O_GPT_A1_CLK_GATING,   APPS_RCM_O_GPT_A1_SOFT_RESET   },
	{APPS_RCM_O_GPT_A2_CLK_GATING,   APPS_RCM_O_GPT_A2_SOFT_RESET   },
	{APPS_RCM_O_GPT_A3_CLK_GATING,   APPS_RCM_O_GPT_A3_SOFT_RESET   },
	{APPS_RCM_O_CRYPTO_CLK_GATING,   APPS_RCM_O_CRYPTO_SOFT_RESET   },
	{APPS_RCM_O_MCSPI_S0_CLK_GATING, APPS_RCM_O_MCSPI_S0_SOFT_RESET },
	{APPS_RCM_O_I2C_CLK_GATING,      APPS_RCM_O_I2C_SOFT_RESET      }

};

//*****************************************************************************
//
//! Set a special bit
//!
//! \return None.
//
//*****************************************************************************
void PRCMSetSpecialBit(unsigned char bit)
{
    unsigned int uiRegValue;

    uiRegValue = MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) | (1 << bit);

    PRCMHIBRegWrite(RTC_MSEC_U32_REG_ADDR, uiRegValue);
}

//*****************************************************************************
//
//! Clear a special bit
//!
//! \return None.
//
//*****************************************************************************
void PRCMClearSpecialBit(unsigned char bit)
{
    unsigned int uiRegValue;

    uiRegValue = MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) & (~(1 << bit));

    PRCMHIBRegWrite(RTC_MSEC_U32_REG_ADDR, uiRegValue);
}

//*****************************************************************************
//
//! Read a special bit
//!
//! \return Value of the bit
//
//*****************************************************************************
tBoolean PRCMGetSpecialBit(unsigned char bit)
{
    tBoolean value = (MAP_PRCMHIBRegRead(RTC_MSEC_U32_REG_ADDR) & (1 << bit)) ? true : false;
    // special bits must be cleared immediatelly after reading
    PRCMClearSpecialBit(bit);
    return value;
}

//*****************************************************************************
//
//! Performs a software reset of a SOC
//!
//! This function performs a software reset of a SOC
//!
//! \return None.
//
//*****************************************************************************
void PRCMSOCReset(void)
{
  //
  // Reset MCU
  //
  HWREG(GPRCM_BASE+ GPRCM_O_MCU_GLOBAL_SOFT_RESET) |= 0x1;

}

//*****************************************************************************
//
//! Performs a software reset of a MCU and associated peripherals
//!
//! \param bIncludeSubsystem is \b true to reset associated peripherals.
//!
//! This function performs a software reset of a MCU and associated peripherals.
//! To reset the associated peripheral, the parameter \e bIncludeSubsystem
//! should be set to \b true.
//!
//! \return None.
//
//*****************************************************************************
void PRCMMCUReset(tBoolean bIncludeSubsystem)
{
  if(bIncludeSubsystem)
  {
    //
    // Reset Apps processor and associated peripheral
    //
    HWREG(GPRCM_BASE+ GPRCM_O_APPS_SOFT_RESET) = 0x2;
  }
  else
  {
    //
    // Reset Apps processor only
    //
    HWREG(GPRCM_BASE+ GPRCM_O_APPS_SOFT_RESET) = 0x1;
  }
}

//*****************************************************************************
//
//! Gets the reason for a reset.
//!
//! This function returns the reason(s) for a reset. The reset reason are:-
//! -\b PRCM_POWER_ON  - Device is powering up.
//! -\b PRCM_LPDS_EXIT - Device is exiting from LPDS.
//! -\b PRCM_CORE_RESET - Device is exiting soft core only reset
//! -\b PRCM_MCU_RESET - Device is exiting soft subsystem reset.
//! -\b PRCM_WDT_RESET - Device was reset by watchdog.
//! -\b PRCM_SOC_RESET - Device is exting SOC reset.
//! -\b PRCM_HIB_EXIT - Device is exiting hibernate.
//!
//! \return Returns one of the cause defined above.
//
//*****************************************************************************
unsigned long PRCMSysResetCauseGet(void)
{
  unsigned long ulWakeupStatus;

  //
  // Read the Reset status
  //
  ulWakeupStatus = (HWREG(GPRCM_BASE+ GPRCM_O_APPS_RESET_CAUSE) & 0xFF);

  //
  // For hibernate do additional chaeck.
  //
  if(ulWakeupStatus == PRCM_POWER_ON)
  {
    if(MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_WAKE_STATUS) & 0x1)
    {
      ulWakeupStatus = PRCM_HIB_EXIT;
    }
  }

  //
  // Return status.
  //
  return ulWakeupStatus;
}

//*****************************************************************************
//
//! Enable clock(s) to peripheral.
//!
//! \param ulPeripheral is one of the valid peripherals
//! \param ulClkFlags are bitmask of clock(s) to be enabled.
//!
//! This function enables the clock for the specified peripheral. Peripherals
//! are by default clock gated (disabled) and generates a bus fault if
//! accessed.
//!
//! The parameter \e ulClkFlags can be logical OR of the following:
//! -\b PRCM_RUN_MODE_CLK - Ungates clock to the peripheral
//! -\b PRCM_SLP_MODE_CLK - Keeps the clocks ungated in sleep.
//! -\b PRCM_DSLP_MODE_CLK - Keeps the clock ungated in deepsleep.
//!
//! \return None.
//
//*****************************************************************************
void PRCMPeripheralClkEnable(unsigned long ulPeripheral, unsigned long ulClkFlags)
{
  //
  // Enable the specified peripheral clocks, Nothing to be done for PRCM_ADC
  // as it is a dummy define for pinmux utility code generation
  //
  if(ulPeripheral != PRCM_ADC)
  {
    HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulClkReg) |= ulClkFlags;
  }
  //
  // Set the default clock for camera
  //
  if(ulPeripheral == PRCM_CAMERA)
  {
    HWREG(ARCM_BASE + APPS_RCM_O_CAMERA_CLK_GEN) = 0x0404;
  }
}

//*****************************************************************************
//
//! Disables clock(s) to peripheral.
//!
//! \param ulPeripheral is one of the valid peripherals
//! \param ulClkFlags are bitmask of clock(s) to be enabled.
//!
//! This function disable the clock for the specified peripheral. Peripherals
//! are by default clock gated (disabled) and generated a bus fault if
//! accessed.
//!
//! The parameter \e ulClkFlags can be logical OR bit fields as defined in
//! PRCMEnablePeripheral().
//!
//! \return None.
//
//*****************************************************************************
void PRCMPeripheralClkDisable(unsigned long ulPeripheral, unsigned long ulClkFlags)
{
  //
  // Disable the specified peripheral clocks
  //
  HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulClkReg) &= ~ulClkFlags;
}

//*****************************************************************************
//
//! Gets the input clock for the specified peripheral.
//!
//! \param ulPeripheral is one of the valid peripherals.
//!
//! This function gets the input clock for the specified peripheral.
//!
//! The parameter \e ulPeripheral has the same definition as that in
//! PRCMPeripheralClkEnable();
//!
//! \return Returns input clock frequency for specified peripheral.
//
//*****************************************************************************
unsigned long PRCMPeripheralClockGet(unsigned long ulPeripheral)
{
  unsigned long ulClockFreq;
  unsigned long ulHiPulseDiv;
  unsigned long ulLoPulseDiv;

  //
  // Get the clock based on specified peripheral.
  //
  if(((ulPeripheral == PRCM_SSPI) | (ulPeripheral == PRCM_LSPI)
            | (ulPeripheral == PRCM_GSPI)))
  {
    return XTAL_CLK;
  }
  else if(ulPeripheral == PRCM_CAMERA)
  {
    ulHiPulseDiv = ((HWREG(ARCM_BASE + APPS_RCM_O_CAMERA_CLK_GEN) >> 8) & 0x07);
    ulLoPulseDiv = (HWREG(ARCM_BASE + APPS_RCM_O_CAMERA_CLK_GEN)& 0xFF);
  }
  else if(ulPeripheral == PRCM_SDHOST)
  {
    ulHiPulseDiv = ((HWREG(ARCM_BASE + APPS_RCM_O_MMCHS_CLK_GEN) >> 8) & 0x07);
    ulLoPulseDiv = (HWREG(ARCM_BASE + APPS_RCM_O_MMCHS_CLK_GEN)& 0xFF);
  }
  else
  {
    return SYS_CLK;
  }

  //
  // Compute the clock freq. from the divider value
  //
  ulClockFreq = (240000000/((ulHiPulseDiv + 1) + (ulLoPulseDiv + 1)));

  //
  // Return the clock rate.
  //
  return ulClockFreq;
}

//*****************************************************************************
//
//! Performs a software reset of a peripheral.
//!
//! \param ulPeripheral is one of the valid peripheral.
//!
//! This assert or deassert reset to the specified peripheral based of the
//! \e bAssert parameter.
//!
//! \return None.
//
//*****************************************************************************
void PRCMPeripheralReset(unsigned long ulPeripheral)
{
  volatile unsigned long ulDelay;

  if( ulPeripheral != PRCM_DTHE)
  {
    //
    // Assert the reset
    //
    HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulRstReg)
                                                         |= PRCM_SOFT_RESET;
    //
    // Delay for a little bit.
    //
    for(ulDelay = 0; ulDelay < 16; ulDelay++)
    {
    }

    //
    // Deassert the reset
    //
    HWREG(ARCM_BASE+PRCM_PeriphRegsList[ulPeripheral].ulRstReg)
                                                          &= ~PRCM_SOFT_RESET;
  }
}

//*****************************************************************************
//
//! Determines if a peripheral is ready.
//!
//! \param ulPeripheral is one of the valid modules
//!
//! This function determines if a particular peripheral is ready to be
//! accessed. The peripheral may be in a non-ready state if it is not enabled,
//! is being held in reset, or is in the process of becoming ready after being
//! enabled or taken out of reset.
//!
//! \return Returns \b true if the  peripheral is ready, \b false otherwise.
//
//*****************************************************************************
tBoolean PRCMPeripheralStatusGet(unsigned long ulPeripheral)
{
  unsigned long ReadyBit;

  //
  // Read the ready bit status
  //
  ReadyBit = HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulRstReg);
  ReadyBit = ReadyBit & PRCM_ENABLE_STATUS;

  if (ReadyBit)
  {
    //
    // Module is ready
    //
    return(true);
  }
  else
  {
    //
    // Module is not ready
    //
    return(false);
  }
}

//*****************************************************************************
//
//! Configure I2S fracactional divider
//!
//! \param ulI2CClkFreq is the required input clock for McAPS module
//!
//! This function configures I2S fractional divider. By default this
//! divider is set to output 24 Mhz clock to I2S module.
//!
//! The minimum frequency that can be obtained by configuring this divider is
//!
//! (240000KHz/1023.99) =  234.377 KHz
//!
//! \return None.
//
//*****************************************************************************
void PRCMI2SClockFreqSet(unsigned long ulI2CClkFreq)
{
 unsigned long long ullDiv;
  unsigned short usInteger;
  unsigned short usFrac;

  ullDiv = (((unsigned long long)240000000 * 65536)/ulI2CClkFreq);

  usInteger = (ullDiv/65536);
  usFrac    = (ullDiv%65536);

  HWREG(ARCM_BASE + APPS_RCM_O_MCASP_FRAC_CLK_CONFIG0) =
    ((usInteger & 0x3FF) << 16 | usFrac);
}

//*****************************************************************************
//
//! Sets the LPDS exit PC and SP restore vlaues.
//!
//! \param ulStackPtr is the SP restore value.
//! \param ulProgCntr is the PC restore value
//!
//! This function sets the LPDS exit PC and SP restore vlaues. Setting
//! \e ulProgCntr to a non-zero value, forces bootloader to jump to that
//! address with Stack Pointer initialized to \e ulStackPtr on LPDS exit,
//! otherwise the application's vector table entries are used.
//!
//! \return None.
//
//*****************************************************************************
void PRCMLPDSRestoreInfoSet(unsigned long ulStackPtr, unsigned long ulProgCntr)
{
  //
  // Set The SP Value
  //
  HWREG(0x4402E18C) = ulStackPtr;

  //
  // Set The PC Value
  //
  HWREG(0x4402E190) = ulProgCntr;
}

//*****************************************************************************
//
//! Puts the system into Low Power Deel Sleep (LPDS) power mode.
//!
//! This function puts the system into Low Power Deel Sleep (LPDS) power mode.
//! A call to this function never returns and the execution starts from Reset.
//! \sa PRCMLPDSRestoreInfoSet().
//!
//! \return None.
//!
//! \note The Test Power Domain is shutdown whenever the system
//!  enters LPDS (by default). In order to avoid this and allow for
//!  connecting back the debugger after waking up from LPDS,
//!  the macro KEEP_TESTPD_ALIVE has to be defined while building the library.
//!  This is recommended for development purposes only as it adds to
//!  the current consumption of the system.
//!
//
//*****************************************************************************
void PRCMLPDSEnter(void)
{
#ifndef DEBUG
  //
  // Disable TestPD
  //
  HWREG(0x4402E168) |= (1<<9);
#endif

  //
  // Set bandgap duty cycle to 1
  //
  HWREG(HIB1P2_BASE + HIB1P2_O_BGAP_DUTY_CYCLING_EXIT_CFG) = 0x1;

  //
  // Request LPDS
  //
  HWREG(ARCM_BASE + APPS_RCM_O_APPS_LPDS_REQ) = APPS_RCM_APPS_LPDS_REQ_APPS_LPDS_REQ;

  __asm("    nop\n"
        "    nop\n"
        "    nop\n"
        "    nop\n");
}

//*****************************************************************************
//
//! Enable the individual LPDS wakeup source(s).
//!
//! \param ulLpdsWakeupSrc is logical OR of wakeup sources.
//!
//! This function enable the individual LPDS wakeup source(s) and following
//! three wakeup sources (\e ulLpdsWakeupSrc ) are supported by the device.
//! -\b PRCM_LPDS_HOST_IRQ
//! -\b PRCM_LPDS_GPIO
//! -\b PRCM_LPDS_TIMER
//!
//! \return None.
//
//*****************************************************************************
void PRCMLPDSWakeupSourceEnable(unsigned long ulLpdsWakeupSrc)
{
  unsigned long ulRegVal;

  //
  // Read the current wakup sources
  //
  ulRegVal = HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_CFG);

  //
  // Enable individual wakeup source
  //
  ulRegVal = ((ulRegVal | ulLpdsWakeupSrc) & 0x91);

  //
  // Set the configuration in the register
  //
  HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_CFG) = ulRegVal;
}

//*****************************************************************************
//
//! Disable the individual LPDS wakeup source(s).
//!
//! \param ulLpdsWakeupSrc is logical OR of wakeup sources.
//!
//! This function enable the individual LPDS wakeup source(s) and following
//! three wake up sources (\e ulLpdsWakeupSrc ) are supported by the device.
//! -\b PRCM_LPDS_HOST_IRQ
//! -\b PRCM_LPDS_GPIO
//! -\b PRCM_LPDS_TIMER
//!
//! \return None.
//
//*****************************************************************************
void PRCMLPDSWakeupSourceDisable(unsigned long ulLpdsWakeupSrc)
{
  HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_CFG) &= ~ulLpdsWakeupSrc;
}


//*****************************************************************************
//
//! Get LPDS wakeup cause
//!
//! This function gets LPDS wakeup caouse
//!
//! \return Returns values enumerated as described in
//! PRCMLPDSWakeupSourceEnable().
//
//*****************************************************************************
unsigned long PRCMLPDSWakeupCauseGet(void)
{
  return (HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_SRC));
}

//*****************************************************************************
//
//! Sets LPDS wakeup Timer
//!
//! \param ulTicks is number of 32.768 KHz clocks
//!
//! This function sets internal LPDS wakeup timer running at 32.768 KHz. The
//! timer is only configured if the parameter \e ulTicks is in valid range i.e.
//! from 21 to 2^32.
//!
//! \return Returns \b true on success, \b false otherwise.
//
//*****************************************************************************
void PRCMLPDSIntervalSet(unsigned long ulTicks)
{
  //
  // Check sleep is atleast for 21 cycles
  // If not set the sleep time to 21 cycles
  //
  if( ulTicks < 21)
  {
      ulTicks = 21;
  }

  HWREG(GPRCM_BASE + GPRCM_O_APPS_LPDS_WAKETIME_WAKE_CFG) = ulTicks;
  HWREG(GPRCM_BASE + GPRCM_O_APPS_LPDS_WAKETIME_OPP_CFG) = ulTicks-20;
}

//*****************************************************************************
//
//! Selects the GPIO for LPDS wakeup
//!
//! \param ulGPIOPin is one of the valid GPIO fro LPDS wakeup.
//! \param ulType is the wakeup trigger type.
//!
//! This function setects the wakeup GPIO for LPDS wakeup and can be
//! used to select one out of 7 pre-defined GPIO(s).
//!
//! The parameter \e ulLpdsGPIOSel should be one of the following:-
//! -\b PRCM_LPDS_GPIO2
//! -\b PRCM_LPDS_GPIO4
//! -\b PRCM_LPDS_GPIO13
//! -\b PRCM_LPDS_GPIO17
//! -\b PRCM_LPDS_GPIO11
//! -\b PRCM_LPDS_GPIO24
//! -\b PRCM_LPDS_GPIO26
//!
//! The parameter \e ulType sets the trigger type and can be one of the
//! following:
//! - \b PRCM_LPDS_LOW_LEVEL
//! - \b PRCM_LPDS_HIGH_LEVEL
//! - \b PRCM_LPDS_FALL_EDGE
//! - \b PRCM_LPDS_RISE_EDGE
//!
//! \return None.
//
//*****************************************************************************
void PRCMLPDSWakeUpGPIOSelect(unsigned long ulGPIOPin, unsigned long ulType)
{
  //
  // Set the wakeup GPIO
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_LPDS_GPIO_SEL, ulGPIOPin);

  //
  // Set the trigger type.
  //
  HWREG(GPRCM_BASE + GPRCM_O_APPS_GPIO_WAKE_CONF) = (ulType & 0x3);
}

//*****************************************************************************
//
//! Puts the system into Sleep.
//!
//! This function puts the system into sleep power mode. System exits the power
//! state on any one of the available interrupt. On exit from sleep mode the
//! function returns to the calling function with all the processor core
//! registers retained.
//!
//! \return None.
//
//*****************************************************************************
void PRCMSleepEnter(void)
{
  //
  // Request Sleep
  //
  CPUwfi();
}

//*****************************************************************************
//
//! Puts the system into Deep Sleep power mode.
//!
//! This function puts the system into Deep Sleep power mode. System exits the
//! power state on any one of the available interrupt. On exit from deep
//! sleep the function returns to the calling function with all the processor
//! core registers retained.
//!
//! \return None.
//
//*****************************************************************************
void PRCMDeepSleepEnter(void)
{
  //
  // Set bandgap duty cycle to 1
  //
  HWREG(HIB1P2_BASE + HIB1P2_O_BGAP_DUTY_CYCLING_EXIT_CFG) = 0x1;

  //
  // Enable DSLP in cortex
  //
  HWREG(0xE000ED10)|=1<<2;

  //
  // Request Deep Sleep
  //
  CPUwfi();

  //
  // Disable DSLP in cortex before
  // returning to the caller
  //
  HWREG(0xE000ED10) &= ~(1<<2);

}

//*****************************************************************************
//
//! Enable SRAM column retention during Deep Sleep and/or LPDS Power mode(s)
//!
//! \param ulSramColSel is bit mask of valid SRAM columns.
//! \param ulModeFlags is the bit mask of power modes.
//!
//! This functions enables the SRAM retention. The device supports configurable
//! SRAM column retention in Low Power Deep Sleep (LPDS) and Deep Sleep power
//! modes. Each column is of 64 KB size.
//!
//! The parameter \e ulSramColSel should be logical OR of the following:-
//! -\b PRCM_SRAM_COL_1
//! -\b PRCM_SRAM_COL_2
//! -\b PRCM_SRAM_COL_3
//! -\b PRCM_SRAM_COL_4
//!
//! The parameter \e ulModeFlags selects the power modes and sholud be logical
//! OR of one or more of the following
//! -\b PRCM_SRAM_DSLP_RET
//! -\b PRCM_SRAM_LPDS_RET
//!
//! \return None.
//
//****************************************************************************
void PRCMSRAMRetentionEnable(unsigned long ulSramColSel, unsigned long ulModeFlags)
{
  if(ulModeFlags & PRCM_SRAM_DSLP_RET)
  {
    //
    // Configure deep sleep SRAM retention register
    //
    HWREG(GPRCM_BASE+ GPRCM_O_APPS_SRAM_DSLP_CFG) = (ulSramColSel & 0xF);
  }

  if(ulModeFlags & PRCM_SRAM_LPDS_RET)
  {
    //
    // Configure LPDS SRAM retention register
    //
    HWREG(GPRCM_BASE+ GPRCM_O_APPS_SRAM_LPDS_CFG) = (ulSramColSel & 0xF);
  }
}

//*****************************************************************************
//
//! Disable SRAM column retention during Deep Sleep and/or LPDS Power mode(s).
//!
//! \param ulSramColSel is bit mask of valid SRAM columns.
//! \param ulFlags is the bit mask of power modes.
//!
//! This functions disable the SRAM retention. The device supports configurable
//! SRAM column retention in Low Power Deep Sleep (LPDS) and Deep Sleep power
//! modes. Each column is of 64 KB size.
//!
//! The parameter \e ulSramColSel should be logical OR of the following:-
//! -\b PRCM_SRAM_COL_1
//! -\b PRCM_SRAM_COL_2
//! -\b PRCM_SRAM_COL_3
//! -\b PRCM_SRAM_COL_4
//!
//! The parameter \e ulFlags selects the power modes and sholud be logical OR
//! of one or more of the following
//! -\b PRCM_SRAM_DSLP_RET
//! -\b PRCM_SRAM_LPDS_RET
//!
//! \return None.
//
//****************************************************************************
void PRCMSRAMRetentionDisable(unsigned long ulSramColSel, unsigned long ulFlags)
{
  if(ulFlags & PRCM_SRAM_DSLP_RET)
  {
    //
    // Configure deep sleep SRAM retention register
    //
    HWREG(GPRCM_BASE+ GPRCM_O_APPS_SRAM_DSLP_CFG) &= ~(ulSramColSel & 0xF);
  }

  if(ulFlags & PRCM_SRAM_LPDS_RET)
  {
    //
    // Configure LPDS SRAM retention register
    //
    HWREG(GPRCM_BASE+ GPRCM_O_APPS_SRAM_LPDS_CFG) &= ~(ulSramColSel & 0xF);
  }
}


//*****************************************************************************
//
//! Enables individual HIB wakeup source(s).
//!
//! \param ulHIBWakupSrc is logical OR of valid HIB wakeup sources.
//!
//! This function enables individual HIB wakeup source(s). The paramter
//! \e ulHIBWakupSrc is the bit mask of HIB wakeup sources and should be
//! logical OR of one or more of the follwoing :-
//! -\b PRCM_HIB_SLOW_CLK_CTR
//! -\b PRCM_HIB_GPIO2
//! -\b PRCM_HIB_GPIO4
//! -\b PRCM_HIB_GPIO13
//! -\b PRCM_HIB_GPIO17
//! -\b PRCM_HIB_GPIO11
//! -\b PRCM_HIB_GPIO24
//! -\b PRCM_HIB_GPIO26
//!
//! \return None.
//
//*****************************************************************************
void PRCMHibernateWakeupSourceEnable(unsigned long ulHIBWakupSrc)
{
  unsigned long ulRegValue;

  //
  // Read the RTC register
  //
  ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN);

  //
  // Enable the RTC as wakeup source if specified
  //
  ulRegValue |= (ulHIBWakupSrc & 0x1);

  //
  // Enable HIB wakeup sources
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN,ulRegValue);

  //
  // REad the GPIO wakeup configuration register
  //
  ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN);

  //
  // Enable the specified GPIOs a wakeup sources
  //
  ulRegValue |= ((ulHIBWakupSrc>>16)&0xFF);

  //
  // Write the new register configuration
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN,ulRegValue);
}

//*****************************************************************************
//
//! Disable individual HIB wakeup source(s).
//!
//! \param ulHIBWakupSrc is logical OR of valid HIB wakeup sources.
//!
//! This function disable individual HIB wakeup source(s). The paramter
//! \e ulHIBWakupSrc is same as bit fileds defined in
//! PRCMEnableHibernateWakeupSource()
//!
//! \return None.
//
//*****************************************************************************
void PRCMHibernateWakeupSourceDisable(unsigned long ulHIBWakupSrc)
{
  unsigned long ulRegValue;

  //
  // Read the RTC register
  //
  ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN);

  //
  // Disable the RTC as wakeup source if specified
  //
  ulRegValue &= ~(ulHIBWakupSrc & 0x1);

  //
  // Disable HIB wakeup sources
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN,ulRegValue);

  //
  // Read the GPIO wakeup configuration register
  //
  ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN);

  //
  // Enable the specified GPIOs a wakeup sources
  //
  ulRegValue &= ~((ulHIBWakupSrc>>16)&0xFF);

  //
  // Write the new register configuration
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN,ulRegValue);
}


//*****************************************************************************
//
//! Get hibernate wakeup cause
//!
//! This function gets the hibernate wakeup cause.
//!
//! \return Returns \b PRCM_HIB_WAKEUP_CAUSE_SLOW_CLOCK or
//! \b PRCM_HIB_WAKEUP_CAUSE_GPIO
//
//*****************************************************************************
unsigned long PRCMHibernateWakeupCauseGet(void)
{
  return ((MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_WAKE_STATUS)>>1)&0xF);
}

//*****************************************************************************
//
//! Sets Hibernate wakeup Timer
//!
//! \param ullTicks is number of 32.768 KHz clocks
//!
//! This function sets internal hibernate wakeup timer running at 32.768 KHz.
//!
//! \return Returns \b true on success, \b false otherwise.
//
//*****************************************************************************
void PRCMHibernateIntervalSet(unsigned long long ullTicks)
{
  unsigned long long ullRTCVal;

  //
  // Latch the RTC vlaue
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_READ ,0x1);

  //
  // Read latched values as 2 32-bit vlaues
  //
  ullRTCVal  = MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_TIMER_MSW);
  ullRTCVal  = ullRTCVal << 32;
  ullRTCVal |= MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_LSW);

  //
  // Add the interval
  //
  ullRTCVal = ullRTCVal + ullTicks;

  //
  // Set RTC match value
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_LSW_CONF,
                                            (unsigned long)(ullRTCVal));
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_MSW_CONF,
                                           (unsigned long)(ullRTCVal>>32));
}


//*****************************************************************************
//
//! Selects the GPIO(s) for hibernate wakeup
//!
//! \param ulGPIOBitMap is the bit-map of valid hibernate wakeup GPIO.
//! \param ulType is the wakeup trigger type.
//!
//! This function setects the wakeup GPIO for hibernate and can be
//! used to select any combination of 7 pre-defined GPIO(s).
//!
//! This function enables individual HIB wakeup source(s). The paramter
//! \e ulGPIOBitMap should be one of the follwoing :-
//! -\b PRCM_HIB_GPIO2
//! -\b PRCM_HIB_GPIO4
//! -\b PRCM_HIB_GPIO13
//! -\b PRCM_HIB_GPIO17
//! -\b PRCM_HIB_GPIO11
//! -\b PRCM_HIB_GPIO24
//! -\b PRCM_HIB_GPIO26
//!
//! The parameter \e ulType sets the trigger type and can be one of the
//! following:
//! - \b PRCM_HIB_LOW_LEVEL
//! - \b PRCM_HIB_HIGH_LEVEL
//! - \b PRCM_HIB_FALL_EDGE
//! - \b PRCM_HIB_RISE_EDGE
//!
//! \return None.
//
//*****************************************************************************
void PRCMHibernateWakeUpGPIOSelect(unsigned long ulGPIOBitMap, unsigned long ulType)
{
  unsigned char ucLoop;
  unsigned long ulRegValue;

  //
  // Shift the bits to extract the GPIO selection
  //
  ulGPIOBitMap >>= 16;

  //
  // Set the configuration for each GPIO
  //
  for(ucLoop=0; ucLoop < 7; ucLoop++)
  {
    if(ulGPIOBitMap & (1<<ucLoop))
    {
      ulRegValue  = MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_CONF);
      ulRegValue |= (ulType << (ucLoop*2));
      MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_CONF, ulRegValue);
    }
  }
}

//*****************************************************************************
//
//! Puts the system into Hibernate
//!
//! This function puts the system into Hibernate. The device enters HIB
//! immediately and on exit from HIB device core starts its execution from
//! reset thus the function never returns.
//!
//! \return None.
//
//*****************************************************************************
void PRCMHibernateEnter(void)
{

  //
  // Request hibernate.
  //
  MAP_PRCMHIBRegWrite((HIB3P3_BASE+HIB3P3_O_MEM_HIB_REQ),0x1);

  __asm("    nop\n"
        "    nop\n"
        "    nop\n"
        "    nop\n");
}

//*****************************************************************************
//
//! Gets the current value of the internal slow clock counter
//!
//! This function latches and reads the internal RTC running at 32.768 Khz
//!
//! \return 64-bit current counter vlaue.
//
//*****************************************************************************
unsigned long long PRCMSlowClkCtrGet(void)
{
  unsigned long long ullRTCVal;

  //
  // Latch the RTC vlaue
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_READ, 0x1);

  //
  // Read latched values as 2 32-bit vlaues
  //
  ullRTCVal  = MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_TIMER_MSW);
  ullRTCVal  = ullRTCVal << 32;
  ullRTCVal |= MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_LSW);

  return ullRTCVal;
}

//*****************************************************************************
//
//! Gets the current value of the internal slow clock counter
//!
//! This function is similar to \sa PRCMSlowClkCtrGet() but reads the counter
//! value from a relatively faster interface using an auto-latch mechainsm.
//!
//! \note Due to the nature of implemetation of auto latching, when using this
//! API, the recommendation is to read the value thrice and identify the right
//! value (as 2 out the 3 read values will always be correct and with a max. of
//! 1 LSB change)
//!
//! \return 64-bit current counter vlaue.
//
//*****************************************************************************
unsigned long long PRCMSlowClkCtrFastGet(void)
{
  unsigned long long ullRTCVal;

  //
  // Read as 2 32-bit values
  //
  ullRTCVal = HWREG(HIB1P2_BASE + HIB1P2_O_HIB_RTC_TIMER_MSW_1P2);
  ullRTCVal = ullRTCVal << 32;
  ullRTCVal |= HWREG(HIB1P2_BASE + HIB1P2_O_HIB_RTC_TIMER_LSW_1P2);

  return ullRTCVal;

}

//*****************************************************************************
//
//! Sets slow clock counter match value to interrupt the processor.
//!
//! \param ullValue is the match value.
//!
//! This function sets the match value for  slow clock counter. This is use
//! to interrupt the processor when RTC counts to the specified value.
//!
//! \return None.
//
//*****************************************************************************
void PRCMSlowClkCtrMatchSet(unsigned long long ullValue)
{
  //
  // Set RTC match value
  //
  MAP_PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_LSW_CONF,
                                           (unsigned long)(ullValue));
  MAP_PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_MSW_CONF,
                                           (unsigned long)(ullValue>>32));
}

//*****************************************************************************
//
//! Gets slow clock counter match value.
//!
//! This function gets the match value for  slow clock counter. This is use
//! to interrupt the processor when RTC counts to the specified value.
//!
//! \return None.
//
//*****************************************************************************
unsigned long long PRCMSlowClkCtrMatchGet(void)
{
  unsigned long long ullValue;

  //
  // Get RTC match value
  //
  ullValue = MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_MSW_CONF);
  ullValue = ullValue<<32;
  ullValue |= MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_LSW_CONF);

  //
  // Return the value
  //
  return ullValue;
}


//*****************************************************************************
//
//! Write to On-Chip Retention (OCR) register.
//!
//! This function writes to On-Chip retention register. The device supports two
//! 4-byte OCR register which are retained across all power mode.
//!
//! The parameter \e ucIndex is an index of the OCR and can be \b 0 or \b 1.
//!
//! \return None.
//
//*****************************************************************************
void PRCMOCRRegisterWrite(unsigned char ucIndex, unsigned long ulRegValue)
{
  MAP_PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_REG2+(ucIndex << 2),ulRegValue);
}

//*****************************************************************************
//
//! Read from On-Chip Retention (OCR) register.
//!
//! This function reads from On-Chip retention register. The device supports two
//! 4-byte OCR register which are retained across all power mode.
//!
//! The parameter \e ucIndex is an index of the OCR and can be \b 0 or \b 1.
//!
//! \return None.
//
//*****************************************************************************
unsigned long PRCMOCRRegisterRead(unsigned char ucIndex)
{
  //
  // Return the read value.
  //
  return MAP_PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_REG2 + (ucIndex << 2));
}

//*****************************************************************************
//
//! Registers an interrupt handler for the PRCM.
//!
//! \param pfnHandler is a pointer to the function to be called when the
//! interrupt is activated.
//!
//! This function does the actual registering of the interrupt handler.  This
//! function enables the global interrupt in the interrupt controller;
//!
//! \return None.
//
//*****************************************************************************
void PRCMIntRegister(void (*pfnHandler)(void))
{
  //
  // Register the interrupt handler.
  //
  IntRegister(INT_PRCM, pfnHandler);

  //
  // Enable the PRCM interrupt.
  //
  IntEnable(INT_PRCM);
}

//*****************************************************************************
//
//! Unregisters an interrupt handler for the PRCM.
//!
//! This function does the actual unregistering of the interrupt handler.  It
//! clears the handler to be called when a PRCM interrupt occurs.  This
//! function also masks off the interrupt in the interrupt controller so that
//! the interrupt handler no longer is called.
//!
//! \return None.
//
//*****************************************************************************
void PRCMIntUnregister(void)
{
  //
  // Enable the UART interrupt.
  //
  IntDisable(INT_PRCM);

  //
  // Register the interrupt handler.
  //
  IntUnregister(INT_PRCM);
}

//*****************************************************************************
//
//! Enables individual PRCM interrupt sources.
//!
//! \param ulIntFlags is the bit mask of the interrupt sources to be enabled.
//!
//! This function enables the indicated ARCM interrupt sources.  Only the
//! sources that are enabled can be reflected to the processor interrupt;
//! disabled sources have no effect on the processor.
//!
//! The \e ulIntFlags parameter is the logical OR of any of the following:
//! -\b PRCM_INT_SLOW_CLK_CTR
//!
//
//*****************************************************************************
void PRCMIntEnable(unsigned long ulIntFlags)
{
  unsigned long ulRegValue;

  if(ulIntFlags & PRCM_INT_SLOW_CLK_CTR )
  {
    //
    // Enable PRCM interrupt
    //
    HWREG(ARCM_BASE + APPS_RCM_O_APPS_RCM_INTERRUPT_ENABLE) |= 0x4;

    //
    // Enable RTC interrupt
    //
    ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE);
    ulRegValue |= 0x1;
    MAP_PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE, ulRegValue);
  }
}

//*****************************************************************************
//
//! Disables individual PRCM interrupt sources.
//!
//! \param ulIntFlags is the bit mask of the interrupt sources to be disabled.
//!
//! This function disables the indicated ARCM interrupt sources.  Only the
//! sources that are enabled can be reflected to the processor interrupt;
//! disabled sources have no effect on the processor.
//!
//! The \e ulIntFlags parameter has the same definition as the \e ulIntFlags
//! parameter to PRCMEnableInterrupt().
//!
//! \return None.
//
//*****************************************************************************
void PRCMIntDisable(unsigned long ulIntFlags)
{
  unsigned long ulRegValue;

  if(ulIntFlags & PRCM_INT_SLOW_CLK_CTR )
  {
    //
    // Disable PRCM interrupt
    //
    HWREG(ARCM_BASE + APPS_RCM_O_APPS_RCM_INTERRUPT_ENABLE) &= ~0x4;

    //
    // Disable RTC interrupt
    //
    ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE);
    ulRegValue &= ~0x1;
    MAP_PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE, ulRegValue);
  }
}

//*****************************************************************************
//
//! Gets the current interrupt status.
//!
//! This function returns the PRCM interrupt status of interrupts that are
//! allowed to reflect to the processor. The interrupts are cleared on read.
//!
//! \return Returns the current interrupt status.
//
//*****************************************************************************
unsigned long PRCMIntStatus(void)
{
    return HWREG(ARCM_BASE + APPS_RCM_O_APPS_RCM_INTERRUPT_STATUS);
}

//*****************************************************************************
//
//! Mark the function of RTC as being used
//!
//! This function marks in HW that feature to maintain calendar time in device
//! is being used.
//!
//! Specifically, this feature reserves user's HIB Register-1 accessed through
//! PRCMOCRRegisterWrite(1) for internal work / purpose, therefore, the stated
//! register is not available to user. Also, users must not excercise the Slow
//! Clock Counter API(s), if RTC has been set for use.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCInUseSet(void)
{
        RTC_USE_SET();
        return;
}

//*****************************************************************************
//
//! Clear the function of RTC as being used
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCInUseClear(void)
{
        RTC_USE_CLR();
        return;
}

//*****************************************************************************
//
//! Ascertain whether function of RTC is being used
//!
//! This function indicates whether function of RTC is being used on the device
//! or not.
//!
//! This routine should be utilized by the application software, when returning
//! from low-power, to confirm that RTC has been put to use and may not need to
//! set the value of the RTC.
//!
//! The RTC feature, if set or marked, can be only reset either through reboot
//! or power cycle.
//!
//! \return None.
//
//*****************************************************************************
tBoolean PRCMRTCInUseGet(void)
{
        return IS_RTC_USED()? true : false;
}

//*****************************************************************************
//
//! Set the calendar time in the device.
//!
//! \param ulSecs refers to the seconds part of the  calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function sets the specified calendar time in the device. The calendar
//! time is outlined in terms of seconds and milliseconds. However, the device
//! makes no assumption about the origin or reference of the calendar time.
//!
//! The device uses the indicated calendar value to update and maintain the
//! wall-clock time across active and low power states.
//!
//! The function PRCMRTCInUseSet() must be invoked prior to use of this feature.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCSet(unsigned long ulSecs, unsigned short usMsec)
{
        unsigned long long ullMsec = 0;

        if(IS_RTC_USED()) {
                ullMsec = RTC_U64MSEC_MK(ulSecs, usMsec) - SCC_U64MSEC_GET();

                 RTC_U32SECS_REG_WR(RTC_SECS_IN_U64MSEC(ullMsec));
                 RTC_U32MSEC_REG_WR(RTC_MSEC_IN_U64MSEC(ullMsec));
        }

        return;
}

//*****************************************************************************
//
//! Get the instantaneous calendar time from the device.
//!
//! \param ulSecs refers to the seconds part of the  calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function fetches the instantaneous value of the ticking calendar time
//! from the device. The calendar time is outlined in terms of seconds and
//! milliseconds.
//!
//! The device provides the calendar value that has been maintained across
//! active and low power states.
//!
//! The function PRCMRTCSet() must have been invoked once to set a reference.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCGet(unsigned long *ulSecs, unsigned short *usMsec)
{
        unsigned long long ullMsec = 0;

        if(IS_RTC_USED()) {
                ullMsec  = RTC_U64MSEC_MK(RTC_U32SECS_REG_RD(),
                                          RTC_U32MSEC_REG_RD());
                ullMsec += SCC_U64MSEC_GET();
        }

        *ulSecs = RTC_SECS_IN_U64MSEC(ullMsec);
        *usMsec = RTC_MSEC_IN_U64MSEC(ullMsec);

        return;
}

//*****************************************************************************
//
//! Set a calendar time alarm.
//!
//! \param ulSecs refers to the seconds part of the  calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function sets an wall-clock alarm in the device to be reported for  a
//! futuristic calendar time. The calendar time is outlined in terms of seconds
//! and milliseconds.
//!
//! The device provides uses the calendar value that has been maintained across
//! active and low power states to report attainment of alarm time.
//!
//! The function PRCMRTCSet() must have been invoked once to set a reference.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCMatchSet(unsigned long ulSecs, unsigned short usMsec)
{
        unsigned long long ullMsec = 0;

        if(IS_RTC_USED()) {
                ullMsec  = RTC_U64MSEC_MK(ulSecs, usMsec);
                ullMsec -= RTC_U64MSEC_MK(RTC_U32SECS_REG_RD(),
                                          RTC_U32MSEC_REG_RD());
                SCC_U64MSEC_MATCH_SET(SELECT_SCC_U42BITS(ullMsec));
        }

        return;
}

//*****************************************************************************
//
//! Get a previously set calendar time alarm.
//!
//! \param ulSecs refers to the seconds part of the  calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function fetches from the device a wall-clock alarm that would  have
//! been previously set in the device. The calendar time is outlined in terms
//! of seconds and milliseconds.
//!
//! If no alarm was set in the past, then this function would fetch a random
//! information.
//!
//! The function PRCMRTCMatchSet() must have been invoked once to set an alarm.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCMatchGet(unsigned long *ulSecs, unsigned short *usMsec)
{
        unsigned long long ullMsec = 0;

        if(IS_RTC_USED()) {
                ullMsec  = SCC_U64MSEC_MATCH_GET();
                ullMsec += RTC_U64MSEC_MK(RTC_U32SECS_REG_RD(),
                                          RTC_U32MSEC_REG_RD());
        }

        *ulSecs = RTC_SECS_IN_U64MSEC(ullMsec);
        *usMsec = RTC_MSEC_IN_U64MSEC(ullMsec);

        return;
}

//*****************************************************************************
//
//! MCU Initialization Routine
//!
//! This function sets mandatory configurations for the MCU
//!
//! \return None
//
//*****************************************************************************
void PRCMCC3200MCUInit(void)
{
    unsigned long ulRegValue;

    //
    // DIG DCDC LPDS ECO Enable
    //
    HWREG(0x4402F064) |= 0x800000;

    //
    // Enable hibernate ECO for PG 1.32 devices only. With this ECO enabled,
    // any hibernate wakeup source will be kept masked until the device enters
    // hibernate completely (analog + digital)
    //
    ulRegValue = MAP_PRCMHIBRegRead(HIB3P3_BASE  + HIB3P3_O_MEM_HIB_REG0);
    MAP_PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG0, ulRegValue | (1<<4));

    //
    // Handling the clock switching (for 1.32 only)
    //
    HWREG(0x4402E16C) |= 0x3C;

    //
    // Enable uDMA
    //
    MAP_PRCMPeripheralClkEnable(PRCM_UDMA,PRCM_RUN_MODE_CLK);

    //
    // Reset uDMA
    //
    MAP_PRCMPeripheralReset(PRCM_UDMA);

    //
    // Disable uDMA
    //
    MAP_PRCMPeripheralClkDisable(PRCM_UDMA,PRCM_RUN_MODE_CLK);

    //
    // Enable RTC
    //
    if(MAP_PRCMSysResetCauseGet()== PRCM_POWER_ON)
    {
        MAP_PRCMHIBRegWrite(0x4402F804,0x1);
    }

    //
    // SWD mode
    //
    if (((HWREG(0x4402F0C8) & 0xFF) == 0x2))
    {
        HWREG(0x4402E110) = ((HWREG(0x4402E110) & ~0xC0F) | 0x2);
        HWREG(0x4402E114) = ((HWREG(0x4402E110) & ~0xC0F) | 0x2);
    }

    //
    // Override JTAG mux
    //
    HWREG(0x4402E184) |= 0x2;

    //
    // Change UART pins(55,57) mode to PIN_MODE_0 if they are in PIN_MODE_1
    //
    if ((HWREG(0x4402E0A4) & 0xF) == 0x1)
    {
        HWREG(0x4402E0A4) = ((HWREG(0x4402E0A4) & ~0xF));
    }

    if ((HWREG(0x4402E0A8) & 0xF) == 0x1)
    {
        HWREG(0x4402E0A8) = ((HWREG(0x4402E0A8) & ~0xF));
    }

    //
    // DIG DCDC VOUT trim settings based on PROCESS INDICATOR
    //
    if (((HWREG(0x4402DC78) >> 22) & 0xF) == 0xE)
    {
        HWREG(0x4402F0B0) = ((HWREG(0x4402F0B0) & ~(0x00FC0000))|(0x32 << 18));
    }
    else
    {
        HWREG(0x4402F0B0) = ((HWREG(0x4402F0B0) & ~(0x00FC0000))|(0x29 << 18));
    }

    //
    // Enable SOFT RESTART in case of DIG DCDC collapse
    //
    HWREG(0x4402FC74) &= ~(0x10000000);


    //
    // Disable the sleep for ANA DCDC
    //
    HWREG(0x4402F0A8) |= 0x00000004 ;
}

//*****************************************************************************
//
//! Reads 32-bit value from register at specified address
//!
//! \param ulRegAddr is the address of register to be read.
//!
//! This function reads 32-bit value from the register as specified by
//! \e ulRegAddr.
//!
//! \return Return the value of the register.
//
//*****************************************************************************
unsigned long PRCMHIBRegRead(unsigned long ulRegAddr)
{
  unsigned long ulValue;

  //
  // Read the Reg value
  //
  ulValue = HWREG(ulRegAddr);

  //
  // Wait for 200 uSec
  //
  UtilsDelay((80*200)/3);

  //
  // Return the value
  //
  return ulValue;
}

//*****************************************************************************
//
//! Writes 32-bit value to register at specified address
//!
//! \param ulRegAddr is the address of register to be read.
//! \param ulValue is the 32-bit value to be written.
//!
//! This function writes 32-bit value passed as \e ulValue to the register as
//! specified by \e ulRegAddr
//!
//! \return None
//
//*****************************************************************************
void PRCMHIBRegWrite(unsigned long ulRegAddr, unsigned long ulValue)
{
  //
  // Read the Reg value
  //
  HWREG(ulRegAddr) = ulValue;

  //
  // Wait for 200 uSec
  //
  UtilsDelay((80*200)/3);
}

//*****************************************************************************
//
//! \param ulDivider is clock frequency divider value
//! \param ulWidth is the width of the high pulse
//!
//! This function sets the input frequency for camera module.
//!
//! The frequency is calculated as follows:
//!
//!        f_out = 240MHz/ulDivider;
//!
//! The parameter \e ulWidth sets the width of the high pulse.
//!
//! For e.g.:
//!
//!     ulDivider = 4;
//!     ulWidth   = 2;
//!
//!     f_out = 30 MHz and 50% duty cycle
//!
//! And,
//!
//!     ulDivider = 4;
//!     ulWidth   = 1;
//!
//!     f_out = 30 MHz and 25% duty cycle
//!
//! \return 0 on success, 1 on error
//
//*****************************************************************************
unsigned long PRCMCameraFreqSet(unsigned char ulDivider, unsigned char ulWidth)
{
    if(ulDivider > ulWidth && ulWidth != 0 )
    {
      //
      // Set  the hifh pulse width
      //
      HWREG(ARCM_BASE +
            APPS_RCM_O_CAMERA_CLK_GEN) = (((ulWidth & 0x07) -1) << 8);

      //
      // Set the low pulse width
      //
      HWREG(ARCM_BASE +
            APPS_RCM_O_CAMERA_CLK_GEN) = ((ulDivider - ulWidth - 1) & 0x07);
      //
      // Return success
      //
      return 0;
    }

    //
    // Success;
    //
    return 1;
}

//*****************************************************************************
//
// Close the Doxygen group.
//! @}
//
//*****************************************************************************