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/*
Copyright 2017 (c) Analog Devices, Inc.

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    the documentation and/or other materials provided with the
    distribution.
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    contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.
  - The use of this software may or may not infringe the patent rights
    of one or more patent holders. This license does not release you
    from the requirement that you obtain separate licenses from these
    patent holders to use this software.
  - Use of the software either in source or binary form, must be run
    on or directly connected to an Analog Devices Inc. component.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*!
 ******************************************************************************
 * @file:   adi_sense_gpio.h
 * @brief:  ADISENSE OS-dependent wrapper layer for GPIO interface
 *-----------------------------------------------------------------------------
 */

#ifndef __ADI_SENSE_GPIO_H__
#define __ADI_SENSE_GPIO_H__

#include "inc/adi_sense_types.h"
#include "inc/adi_sense_platform.h"

/*! @ingroup ADISENSE_Host */

/*! @addtogroup ADISENSE_Gpio ADISENSE Host GPIO interface functions
 *  @{
 */

/*! GPIO pin identifiers */
typedef enum
{
    ADI_SENSE_GPIO_PIN_RESET = 0, /*!< RESET GPIO output signal */
    ADI_SENSE_GPIO_PIN_ERROR,     /*!< ERROR GPIO input signal */
    ADI_SENSE_GPIO_PIN_ALERT,     /*!< ALERT GPIO input signal */
    ADI_SENSE_GPIO_PIN_DATAREADY, /*!< DATAREADY GPIO input signal */
} ADI_SENSE_GPIO_PIN;

/*!
 * GPIO callback function signature
 *
 * @param[in] ePinId The GPIO pin which triggered the interrupt notification
 * @param[in] pArg   Optional opaque parameter to be passed to the callback
 */
typedef void (*ADI_SENSE_GPIO_CALLBACK)(
    ADI_SENSE_GPIO_PIN               ePinId,
    void                           * pArg);

/*! A handle used in all API functions to identify the GPIO interface context */
typedef void* ADI_SENSE_GPIO_HANDLE;

#ifdef __cplusplus
extern "C"
{
#endif

/*!
 * @brief Open the SPI interface and allocate resources
 *
 * @param[in]  pConfig  Pointer to platform-specific GPIO interface details
 * @param[out] phDevice Pointer to return a GPIO interface context handle
 *
 * @return Status
 *         - #ADI_SENSE_SUCCESS Call completed successfully
 *         - #ADI_SENSE_NO_MEM  Failed to allocate memory for interface context
 */
ADI_SENSE_RESULT adi_sense_GpioOpen(
    ADI_SENSE_PLATFORM_GPIO_CONFIG * pConfig,
    ADI_SENSE_GPIO_HANDLE          * phDevice);

/*!
 * @brief Close GPIO interface and free resources
 *
 * @param[in] hDevice GPIO interface context handle (@ref adi_sense_GpioOpen)
 */
void adi_sense_GpioClose(
    ADI_SENSE_GPIO_HANDLE            hDevice);

/*!
 * @brief Get the state of the specified GPIO pin
 *
 * @param[in]  hDevice GPIO interface context handle (@ref adi_sense_GpioOpen)
 * @param[in]  ePinId  GPIO pin to be read
 * @param[out] pbState Pointer to return the state of the GPIO pin
 *
 * @return Status
 *         - #ADI_SENSE_SUCCESS Call completed successfully
 *         - #ADI_SENSE_INVALID_DEVICE_NUM Invalid GPIO pin specified
 */
ADI_SENSE_RESULT adi_sense_GpioGet(
    ADI_SENSE_GPIO_HANDLE            hDevice,
    ADI_SENSE_GPIO_PIN               ePinId,
    bool_t                         * pbState);

/*!
 * @brief Set the state of the specified GPIO pin
 *
 * @param[in] hDevice GPIO interface context handle (@ref adi_sense_GpioOpen)
 * @param[in] ePinId  GPIO pin to be set
 * @param[in] bState  The state to set for GPIO pin
 *
 * @return Status
 *         - #ADI_SENSE_SUCCESS Call completed successfully
 *         - #ADI_SENSE_INVALID_DEVICE_NUM Invalid GPIO pin specified
 */
ADI_SENSE_RESULT adi_sense_GpioSet(
    ADI_SENSE_GPIO_HANDLE            hDevice,
    ADI_SENSE_GPIO_PIN               ePinId,
    bool_t                           bState);

/*!
 * @brief Enable interrupt notifications on the specified GPIO pin
 *
 * @param[in] hDevice  GPIO interface context handle (@ref adi_sense_GpioOpen)
 * @param[in] ePinId   GPIO pin on which to enable interrupt notifications
 * @param[in] callback Callback function to invoke when the GPIO is asserted
 * @param[in] arg      Optional opaque parameter to be passed to the callback
 *
 * @return Status
 *         - #ADI_SENSE_SUCCESS Call completed successfully
 *         - #ADI_SENSE_INVALID_DEVICE_NUM Invalid GPIO pin specified
 */
ADI_SENSE_RESULT adi_sense_GpioIrqEnable(
    ADI_SENSE_GPIO_HANDLE            hDevice,
    ADI_SENSE_GPIO_PIN               ePinId,
    ADI_SENSE_GPIO_CALLBACK          callback,
    void                           * arg);

/*!
 * @brief Disable interrupt notifications on the specified GPIO pin
 *
 * @param[in] hDevice  GPIO interface context handle (@ref adi_sense_GpioOpen)
 * @param[in] ePinId   GPIO pin on which to disable interrupt notifications
 *
 * @return Status
 *         - #ADI_SENSE_SUCCESS Call completed successfully
 *         - #ADI_SENSE_INVALID_DEVICE_NUM Invalid GPIO pin specified
 */
ADI_SENSE_RESULT adi_sense_GpioIrqDisable(
    ADI_SENSE_GPIO_HANDLE            hDevice,
    ADI_SENSE_GPIO_PIN               ePinId);

#ifdef __cplusplus
}
#endif

/*!
 * @}
 */

#endif /* __ADI_SENSE_GPIO_H__ */