/*
 * Copyright (c) 2016, Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o 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.
 *
 * o Neither the name of Freescale Semiconductor, Inc. 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 HOLDER 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.
 */

#ifndef _FSL_DMIC_H_
#define _FSL_DMIC_H_

#include "fsl_common.h"

/*!
 * @addtogroup dmic_driver
 * @{
 */

/*! @file*/

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

/*!
 * @name DMIC version
 * @{
 */

/*! @brief DMIC driver version 2.0.0. */
#define FSL_DMIC_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))
/*@}*/

/*! @brief DMIC different operation modes. */
typedef enum _operation_mode
{
    kDMIC_OperationModePoll = 0U,      /*!< Polling mode */
    kDMIC_OperationModeInterrupt = 1U, /*!< Interrupt mode */
    kDMIC_OperationModeDma = 2U,       /*!< DMA mode */
} operation_mode_t;

/*! @brief DMIC left/right values. */
typedef enum _stereo_side
{
    kDMIC_Left = 0U,  /*!< Left Stereo channel */
    kDMIC_Right = 1U, /*!< Right Stereo channel */
} stereo_side_t;

/*! @brief DMIC Clock pre-divider values. */
typedef enum
{
    kDMIC_PdmDiv1 = 0U,    /*!< DMIC pre-divider set in divide by 1 */
    kDMIC_PdmDiv2 = 1U,    /*!< DMIC pre-divider set in divide by 2 */
    kDMIC_PdmDiv3 = 2U,    /*!< DMIC pre-divider set in divide by 3 */
    kDMIC_PdmDiv4 = 3U,    /*!< DMIC pre-divider set in divide by 4 */
    kDMIC_PdmDiv6 = 4U,    /*!< DMIC pre-divider set in divide by 6 */
    kDMIC_PdmDiv8 = 5U,    /*!< DMIC pre-divider set in divide by 8 */
    kDMIC_PdmDiv12 = 6U,   /*!< DMIC pre-divider set in divide by 12 */
    kDMIC_PdmDiv16 = 7U,   /*!< DMIC pre-divider set in divide by 16*/
    kDMIC_PdmDiv24 = 8U,   /*!< DMIC pre-divider set in divide by 24*/
    kDMIC_PdmDiv32 = 9U,   /*!< DMIC pre-divider set in divide by 32 */
    kDMIC_PdmDiv48 = 10U,  /*!< DMIC pre-divider set in divide by 48 */
    kDMIC_PdmDiv64 = 11U,  /*!< DMIC pre-divider set in divide by 64*/
    kDMIC_PdmDiv96 = 12U,  /*!< DMIC pre-divider set in divide by 96*/
    kDMIC_PdmDiv128 = 13U, /*!< DMIC pre-divider set in divide by 128 */
} pdm_div_t;

/*! @brief Pre-emphasis Filter coefficient value for 2FS and 4FS modes. */
typedef enum _compensation
{
    kDMIC_CompValueZero = 0U,            /*!< Compensation 0 */
    kDMIC_CompValueNegativePoint16 = 1U, /*!< Compensation -0.16 */
    kDMIC_CompValueNegativePoint15 = 2U, /*!< Compensation -0.15 */
    kDMIC_CompValueNegativePoint13 = 3U, /*!< Compensation -0.13 */
} compensation_t;

/*! @brief DMIC DC filter control values. */
typedef enum _dc_removal
{
    kDMIC_DcNoRemove = 0U, /*!< Flat response no filter */
    kDMIC_DcCut155 = 1U,   /*!< Cut off Frequency is 155 Hz  */
    kDMIC_DcCut78 = 2U,    /*!< Cut off Frequency is 78 Hz  */
    kDMIC_DcCut39 = 3U,    /*!< Cut off Frequency is 39 Hz  */
} dc_removal_t;

/*! @brief DMIC IO configiration. */
typedef enum _dmic_io
{
    kDMIC_PdmDual = 0U,       /*!< Two separate pairs of PDM wires */
    kDMIC_PdmStereo = 4U,     /*!< Stereo Mic */
    kDMIC_PdmBypass = 3U,     /*!< Clk Bypass clocks both channels */
    kDMIC_PdmBypassClk0 = 1U, /*!< Clk Bypass clocks only channel0 */
    kDMIC_PdmBypassClk1 = 2U, /*!< Clk Bypas clocks only channel1 */
} dmic_io_t;

/*! @brief DMIC Channel number. */
typedef enum _dmic_channel
{
    kDMIC_Channel0 = 0U, /*!< DMIC channel 0 */
    kDMIC_Channel1 = 1U, /*!< DMIC channel 1 */
} dmic_channel_t;

/*! @brief DMIC and decimator sample rates. */
typedef enum _dmic_phy_sample_rate
{
    kDMIC_PhyFullSpeed = 0U, /*!< Decimator gets one sample per each chosen clock edge of PDM interface */
    kDMIC_PhyHalfSpeed = 1U, /*!< PDM clock to Microphone is halved, decimator receives each sample twice */
} dmic_phy_sample_rate_t;

/*! @brief DMIC transfer status.*/
enum _dmic_status
{
    kStatus_DMIC_Busy = MAKE_STATUS(kStatusGroup_DMIC, 0),          /*!< DMIC is busy */
    kStatus_DMIC_Idle = MAKE_STATUS(kStatusGroup_DMIC, 1),          /*!< DMIC is idle */
    kStatus_DMIC_OverRunError = MAKE_STATUS(kStatusGroup_DMIC, 2),  /*!< DMIC  over run Error */
    kStatus_DMIC_UnderRunError = MAKE_STATUS(kStatusGroup_DMIC, 3), /*!< DMIC under run Error */
};

/*! @brief DMIC Channel configuration structure. */
typedef struct _dmic_channel_config
{
    pdm_div_t divhfclk;                 /*!< DMIC Clock pre-divider values */
    uint32_t osr;                       /*!< oversampling rate(CIC decimation rate) for PCM */
    int32_t gainshft;                   /*!< 4FS PCM data gain control */
    compensation_t preac2coef;          /*!< Pre-emphasis Filter coefficient value for 2FS */
    compensation_t preac4coef;          /*!< Pre-emphasis Filter coefficient value for 4FS */
    dc_removal_t dc_cut_level;          /*!< DMIC DC filter control values. */
    uint32_t post_dc_gain_reduce;       /*!< Fine gain adjustment in the form of a number of bits to downshift */
    dmic_phy_sample_rate_t sample_rate; /*!< DMIC and decimator sample rates */
    bool saturate16bit; /*!< Selects 16-bit saturation. 0 means results roll over if out range and do not saturate.
                1 means if the result overflows, it saturates at 0xFFFF for positive overflow and
                0x8000 for negative overflow.*/
} dmic_channel_config_t;

/*! @brief DMIC Callback function. */
typedef void (*dmic_callback_t)(void);

/*! @brief HWVAD Callback function. */
typedef void (*dmic_hwvad_callback_t)(void);

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

/*******************************************************************************
 * API
 ******************************************************************************/
#ifdef __cplusplus
extern "C" {
#endif

/*!
 * @brief Get the DMIC instance from peripheral base address.
 *
 * @param base DMIC peripheral base address.
 * @return DMIC instance.
 */
uint32_t DMIC_GetInstance(DMIC_Type *base);

/*!
 * @brief	Turns DMIC Clock on
 * @param	base	: DMIC base
 * @return	Nothing
 */
void DMIC_Init(DMIC_Type *base);

/*!
 * @brief	Turns DMIC Clock off
 * @param	base	: DMIC base
 * @return	Nothing
 */
void DMIC_DeInit(DMIC_Type *base);

/*!
 * @brief	Configure DMIC io
 * @param	base	: The base address of DMIC interface
 * @param	config		: DMIC io configuration
 * @return	Nothing
 */
void DMIC_ConfigIO(DMIC_Type *base, dmic_io_t config);

/*!
 * @brief	Set DMIC operating mode
 * @param	base	: The base address of DMIC interface
 * @param	mode	: DMIC mode
 * @return	Nothing
 */
void DMIC_SetOperationMode(DMIC_Type *base, operation_mode_t mode);

/*!
 * @brief	Configure DMIC channel
 * @param	base		: The base address of DMIC interface
 * @param	channel		: DMIC channel
 * @param side     : stereo_side_t, choice of left or right
 * @param	channel_config	: Channel configuration
 * @return	Nothing
 */
void DMIC_ConfigChannel(DMIC_Type *base,
                        dmic_channel_t channel,
                        stereo_side_t side,
                        dmic_channel_config_t *channel_config);

/*!
 * @brief	Configure Clock scaling
 * @param	base		: The base address of DMIC interface
 * @param	use2fs		: clock scaling
 * @return	Nothing
 */
void DMIC_Use2fs(DMIC_Type *base, bool use2fs);

/*!
 * @brief	Enable a particualr channel
 * @param	base		: The base address of DMIC interface
 * @param	channelmask	: Channel selection
 * @return	Nothing
 */
void DMIC_EnableChannnel(DMIC_Type *base, uint32_t channelmask);

/*!
 * @brief	Configure fifo settings for DMIC channel
 * @param	base		: The base address of DMIC interface
 * @param	channel		: DMIC channel
 * @param	trig_level	: FIFO trigger level
 * @param	enable		: FIFO level
 * @param	resetn		: FIFO reset
 * @return	Nothing
 */
void DMIC_FifoChannel(DMIC_Type *base, uint32_t channel, uint32_t trig_level, uint32_t enable, uint32_t resetn);

/*!
 * @brief	Get FIFO status
 * @param	base		: The base address of DMIC interface
 * @param	channel		: DMIC channel
 * @return	FIFO status
 */
static inline uint32_t DMIC_FifoGetStatus(DMIC_Type *base, uint32_t channel)
{
    return base->CHANNEL[channel].FIFO_STATUS;
}

/*!
 * @brief	Clear FIFO status
 * @param	base		: The base address of DMIC interface
 * @param	channel		: DMIC channel
 * @param	mask		: Bits to be cleared
 * @return	FIFO status
 */
static inline void DMIC_FifoClearStatus(DMIC_Type *base, uint32_t channel, uint32_t mask)
{
    base->CHANNEL[channel].FIFO_STATUS = mask;
}

/*!
 * @brief	Get FIFO data
 * @param	base		: The base address of DMIC interface
 * @param	channel		: DMIC channel
 * @return	FIFO data
 */
static inline uint32_t DMIC_FifoGetData(DMIC_Type *base, uint32_t channel)
{
    return base->CHANNEL[channel].FIFO_DATA;
}

/*!
 * @brief	Enable callback.

 * This function enables the interrupt for the selected DMIC peripheral.
 * The callback function is not enabled until this function is called.
 *
 * @param base Base address of the DMIC peripheral.
 * @param cb callback Pointer to store callback function.
 * @retval None.
 */
void DMIC_EnableIntCallback(DMIC_Type *base, dmic_callback_t cb);

/*!
 * @brief	Disable callback.

 * This function disables the interrupt for the selected DMIC peripheral.
 *
 * @param base Base address of the DMIC peripheral.
 * @param cb callback Pointer to store callback function..
 * @retval None.
 */
void DMIC_DisableIntCallback(DMIC_Type *base, dmic_callback_t cb);

/**
 * @}
 */

/*!
 * @name hwvad
 * @{
 */

/*!
 * @brief Sets the gain value for the noise estimator.
 *
 * @param base DMIC base pointer
 * @param value gain value for the noise estimator.
 * @retval None.
 */
static inline void DMIC_SetGainNoiseEstHwvad(DMIC_Type *base, uint32_t value)
{
    assert(NULL != base);
    base->HWVADTHGN = value & 0xFu;
}

/*!
 * @brief Sets the gain value for the signal estimator.
 *
 * @param base DMIC base pointer
 * @param value gain value for the signal estimator.
 * @retval None.
 */
static inline void DMIC_SetGainSignalEstHwvad(DMIC_Type *base, uint32_t value)
{
    assert(NULL != base);
    base->HWVADTHGS = value & 0xFu;
}

/*!
 * @brief Sets the hwvad filter cutoff frequency parameter.
 *
 * @param base DMIC base pointer
 * @param value cut off frequency value.
 * @retval None.
 */
static inline void DMIC_SetFilterCtrlHwvad(DMIC_Type *base, uint32_t value)
{
    assert(NULL != base);
    base->HWVADHPFS = value & 0x3u;
}

/*!
 * @brief Sets the input gain of hwvad.
 *
 * @param base DMIC base pointer
 * @param value input gain value for hwvad.
 * @retval None.
 */
static inline void DMIC_SetInputGainHwvad(DMIC_Type *base, uint32_t value)
{
    assert(NULL != base);
    base->HWVADGAIN = value & 0xFu;
}

/*!
 * @brief Clears hwvad internal interrupt flag.
 *
 * @param base DMIC base pointer
 * @param st10 bit value.
 * @retval None.
 */
static inline void DMIC_CtrlClrIntrHwvad(DMIC_Type *base, bool st10)
{
    assert(NULL != base);
    base->HWVADST10 = (st10) ? 0x1 : 0x0;
}

/*!
 * @brief Resets hwvad filters.
 *
 * @param base DMIC base pointer
 * @param rstt Reset bit value.
 * @retval None.
 */
static inline void DMIC_FilterResetHwvad(DMIC_Type *base, bool rstt)
{
    assert(NULL != base);
    base->HWVADRSTT = (rstt) ? 0x1 : 0x0;
}

/*!
 * @brief Gets the value from output of the filter z7.
 *
 * @param base DMIC base pointer
 * @retval output of filter z7.
 */
static inline uint16_t DMIC_GetNoiseEnvlpEst(DMIC_Type *base)
{
    assert(NULL != base);
    return (base->HWVADLOWZ & 0xFFFFu);
}

/*!
 * @brief	Enable hwvad callback.

 * This function enables the hwvad interrupt for the selected DMIC  peripheral.
 * The callback function is not enabled until this function is called.
 *
 * @param base Base address of the DMIC peripheral.
 * @param vadcb callback Pointer to store callback function.
 * @retval None.
 */
void DMIC_HwvadEnableIntCallback(DMIC_Type *base, dmic_hwvad_callback_t vadcb);

/*!
 * @brief	Disable callback.

 * This function disables the hwvad interrupt for the selected DMIC peripheral.
 *
 * @param base Base address of the DMIC peripheral.
 * @param vadcb callback Pointer to store callback function..
 * @retval None.
 */
void DMIC_HwvadDisableIntCallback(DMIC_Type *base, dmic_hwvad_callback_t vadcb);

/*! @} */

#ifdef __cplusplus
}
#endif

/*! @}*/

#endif /* __FSL_DMIC_H */