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/*******************************************************************************
 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
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 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of Maxim Integrated
 * Products, Inc. shall not be used except as stated in the Maxim Integrated
 * Products, Inc. Branding Policy.
 *
 * The mere transfer of this software does not imply any licenses
 * of trade secrets, proprietary technology, copyrights, patents,
 * trademarks, maskwork rights, or any other form of intellectual
 * property whatsoever. Maxim Integrated Products, Inc. retains all
 * ownership rights.
 *
 * $Date: 2016-04-27 09:12:45 -0500 (Wed, 27 Apr 2016) $
 * $Revision: 22531 $
 *
 ******************************************************************************/

/**
 * @file    clkman.h
 * @brief   Clock management driver header file.
 */

#ifndef _CLKMAN_H_
#define _CLKMAN_H_

/***** Includes *****/
#include "mxc_config.h"
#include "clkman_regs.h"

#ifdef __cplusplus
extern "C" {
#endif

/***** Definitions *****/

/**
 * @brief Defines clock source selections for the system clock.
 */
typedef enum {
    /** Clock select for 96MHz oscillator */
    CLKMAN_SYSTEM_SOURCE_96MHZ,
    /** Clock select for 4MHz oscillator */
    CLKMAN_SYSTEM_SOURCE_4MHZ
}
clkman_system_source_select_t;

/**
 * @brief Defines clock scales for the system clock.
 * @note 4MHz System source can only be divided down by a maximum factor of 8.
 */
typedef enum {
    CLKMAN_SYSTEM_SCALE_DIV_1,     /** Clock scale for dividing system by 1  */
    CLKMAN_SYSTEM_SCALE_DIV_2,     /** Clock scale for dividing system by 2  */
    CLKMAN_SYSTEM_SCALE_DIV_4,     /** Clock scale for dividing system by 4  */
    CLKMAN_SYSTEM_SCALE_DIV_8,     /** Clock scale for dividing system by 8  */
    CLKMAN_SYSTEM_SCALE_DIV_16     /** Clock scale for dividing system by 16  */
} clkman_system_scale_t;

/**
 * @brief Selects an internal module clock for clock scaling configuration.
 */
typedef enum {
    CLKMAN_CLK_CPU           = 0,     /** CPU clock */
    CLKMAN_CLK_SYNC          = 1,     /** Synchronizer clock */
    CLKMAN_CLK_SPIX          = 2,     /** SPI XIP module clock */
    CLKMAN_CLK_PRNG          = 3,     /** PRNG module clock */
    CLKMAN_CLK_WDT0          = 4,     /** Watchdog Timer 0 clock */
    CLKMAN_CLK_WDT1          = 5,     /** Watchdog Timer 1 clock */
    CLKMAN_CLK_GPIO          = 6,     /** GPIO module clock */
    CLKMAN_CLK_PT            = 7,     /** Pulse Train engine clock */
    CLKMAN_CLK_UART          = 8,     /** UART clock */
    CLKMAN_CLK_I2CM          = 9,     /** I2C Master module clock (for all instances) */
    CLKMAN_CLK_I2CS          = 10,    /** I2C Slave module clock */
    CLKMAN_CLK_SPIM0         = 11,    /** SPI Master instance 0 module clock */
    CLKMAN_CLK_SPIM1         = 12,    /** SPI Master instance 1 module clock */
    CLKMAN_CLK_SPIM2         = 13,    /** SPI Master instance 2 module clock */
    CLKMAN_CLK_OWM           = 15,    /** OWM module clock*/
    CLKMAN_CLK_SPIS          = 16,    /** SPI Slave module clock*/
    CLKMAN_CRYPTO_CLK_AES    = 17,    /** AES engine clock */
    CLKMAN_CRYPTO_CLK_MAA    = 18,    /** Modular Arithmetic Accelerator (MAA) clock */
    CLKMAN_CRYPTO_CLK_PRNG   = 19,    /** Pseudo-random number Generator (PRNG) clock */
    CLKMAN_CLK_MAX           = 19
} clkman_clk_t;

/**
 * @brief Selects a clock to enable/disable
 */
typedef enum {
    CLKMAN_USB_CLOCK    = MXC_F_CLKMAN_CLK_CTRL_USB_CLOCK_ENABLE,
    CLKMAN_CRYPTO_CLOCK = MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE,
    CLKMAN_ADC_CLOCK    = MXC_F_CLKMAN_CLK_CTRL_ADC_CLOCK_ENABLE,
    CLKMAN_WDT0_CLOCK   = MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE,
    CLKMAN_WDT1_CLOCK   = MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE,
    CLKMAN_RTOS_MODE    = MXC_F_CLKMAN_CLK_CTRL_RTOS_MODE,
} clkman_enable_clk_t;

/**
 * @brief Defines clock scales for various clocks.
 */
typedef enum {
    CLKMAN_SCALE_DISABLED   = MXC_V_CLKMAN_CLK_SCALE_DISABLED,      /** Clock disabled */
    CLKMAN_SCALE_DIV_1      = MXC_V_CLKMAN_CLK_SCALE_DIV_1,         /** Clock scale for dividing by 1 */
    CLKMAN_SCALE_DIV_2      = MXC_V_CLKMAN_CLK_SCALE_DIV_2,         /** Clock scale for dividing by 2 */
    CLKMAN_SCALE_DIV_4      = MXC_V_CLKMAN_CLK_SCALE_DIV_4,         /** Clock scale for dividing by 4 */
    CLKMAN_SCALE_DIV_8      = MXC_V_CLKMAN_CLK_SCALE_DIV_8,         /** Clock scale for dividing by 8 */
    CLKMAN_SCALE_DIV_16     = MXC_V_CLKMAN_CLK_SCALE_DIV_16,        /** Clock scale for dividing by 16 */
    CLKMAN_SCALE_DIV_32     = MXC_V_CLKMAN_CLK_SCALE_DIV_32,        /** Clock scale for dividing by 32 */
    CLKMAN_SCALE_DIV_64     = MXC_V_CLKMAN_CLK_SCALE_DIV_64,        /** Clock scale for dividing by 64 */
    CLKMAN_SCALE_DIV_128    = MXC_V_CLKMAN_CLK_SCALE_DIV_128,       /** Clock scale for dividing by 128 */
    CLKMAN_SCALE_DIV_256    = MXC_V_CLKMAN_CLK_SCALE_DIV_256,       /** Clock scale for dividing by 256 */
    CLKMAN_SCALE_AUTO                                               /** Clock scale to auto select divider */
} clkman_scale_t;

/**
 * @brief Defines clock selections for the watchdog timers.
 */
typedef enum {
    CLKMAN_WDT_SELECT_SCALED_SYS_CLK_CTRL   = MXC_V_CLKMAN_WDT0_CLOCK_SELECT_SCALED_SYS_CLK_CTRL_4_WDT0,
    CLKMAN_WDT_SELECT_32KHZ_RTC_OSCILLATOR  = MXC_V_CLKMAN_WDT0_CLOCK_SELECT_32KHZ_RTC_OSCILLATOR,
    CLKMAN_WDT_SELECT_96MHZ_OSCILLATOR      = MXC_V_CLKMAN_WDT0_CLOCK_SELECT_96MHZ_OSCILLATOR,
    CLKMAN_WDT_SELECT_NANO_RING_OSCILLATOR  = MXC_V_CLKMAN_WDT0_CLOCK_SELECT_NANO_RING_OSCILLATOR,
    CLKMAN_WDT_SELECT_DISABLED
} clkman_wdt_clk_select_t;


/***** Function Prototypes *****/

/**
 * @brief Selects the system clock source.
 * @note  4MHz System source can only be divided down by a maximum factor of 8.
 * @param select    System clock source.
 * @param scale     System clock scaler.
 */
void CLKMAN_SetSystemClock(clkman_system_source_select_t select, clkman_system_scale_t scale);

/**
 * @brief Enables/disables the Crypto/TPU relaxation oscillator
 * @param enable    enable (1) or disable (0)
 */
void CLKMAN_CryptoClockEnable(int enable);

/**
 * @brief Enables/Disables the specified clock.
 * @param clk       clock to enable/disable
 * @param enable    enable (1) or disable (0)
 */
void CLKMAN_ClockGate(clkman_enable_clk_t clk, int enable);

/**
 * @brief Sets the specified clock scaler value.
 * @param clk       clock to set scaler value for
 * @param scale     clock scaler value
 */
void CLKMAN_SetClkScale(clkman_clk_t clk, clkman_scale_t scale);

/**
 * @brief Get the specified clock scaler value
 * @param clk       clock to get the scaler value for
 */
clkman_scale_t CLKMAN_GetClkScale(clkman_clk_t clk);

/**
 * @brief Selects the clock source for the watchdog timer
 * @param idx       index of the watchdog timer
 * @param select    clock to select
 * @returns E_NO_ERROR if successful
 */
int CLKMAN_WdtClkSelect(unsigned int idx, clkman_wdt_clk_select_t select);

/**
 * @brief   Get the interrupt flags
 * @returns mask    mask of flags set
 */
__STATIC_INLINE uint32_t CLKMAN_GetFlags(void)
{
    return MXC_CLKMAN->intfl;
}

/**
 * @brief Clear the specified interrupt flags
 * @param mask      mask of flags to clear
 */
__STATIC_INLINE void CLKMAN_ClrFlags(uint32_t mask)
{
    MXC_CLKMAN->intfl = mask;
}

/**
 * @brief Enable the specified interrupt flags
 * @param mask      mask of flags to enable
 */
__STATIC_INLINE void CLKMAN_EnableInt(uint32_t mask)
{
    MXC_CLKMAN->inten |= mask;
}

/**
 * @brief Disable the specified interrupt flags
 * @param mask      mask of flags to disable
 */
__STATIC_INLINE void CLKMAN_DisableInt(uint32_t mask)
{
    MXC_CLKMAN->inten &= ~mask;
}

/**
 * @brief Trim the ring oscillator.
 */
void CLKMAN_TrimRO(void);

#ifdef __cplusplus
}
#endif

#endif /* _CLKMAN_H_ */