/*
    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

/**
 * @file    hal_sio_lld.c
 * @brief   PLATFORM SIO subsystem low level driver source.
 *
 * @addtogroup SIO
 * @{
 */

#include "hal.h"

#if (HAL_USE_SIO == TRUE) || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver local definitions.                                                 */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported variables.                                                */
/*===========================================================================*/

/**
 * @brief   SIO1 driver identifier.
 */
#if (PLATFORM_SIO_USE_SIO1 == TRUE) || defined(__DOXYGEN__)
SIODriver SIOD1;
#endif

/*===========================================================================*/
/* Driver local variables and types.                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* Driver interrupt handlers.                                                */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/

/**
 * @brief   Low level SIO driver initialization.
 *
 * @notapi
 */
void sio_lld_init(void) {

#if PLATFORM_SIO_USE_SIO1 == TRUE
  /* Driver initialization.*/
  sioObjectInit(&SIOD1);
#endif
}

/**
 * @brief   Configures and activates the SIO peripheral.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @return              The operation status.
 *
 * @notapi
 */
msg_t sio_lld_start(SIODriver *siop) {

  if (siop->state == SIO_STOP) {
    /* Enables the peripheral.*/
#if PLATFORM_SIO_USE_SIO1 == TRUE
    if (&SIOD1 == siop) {

    }
#endif
  }

  /* Configures the peripheral.*/

  return HAL_RET_SUCCESS;
}

/**
 * @brief   Deactivates the SIO peripheral.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 *
 * @notapi
 */
void sio_lld_stop(SIODriver *siop) {

  if (siop->state == SIO_READY) {
    /* Resets the peripheral.*/

    /* Disables the peripheral.*/
#if PLATFORM_SIO_USE_SIO1 == TRUE
    if (&SIOD1 == siop) {

    }
#endif
  }
}

/**
 * @brief   Enable flags change notification.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 */
void sio_lld_update_enable_flags(SIODriver *siop) {

  (void)siop;
 }

/**
 * @brief   Get and clears SIO error event flags.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @return              The pending event flags.
 *
 * @notapi
 */
sioevents_t sio_lld_get_and_clear_errors(SIODriver *siop) {
  sioevents_t errors = 0U;

  (void)siop;

  return errors;
}

/**
 * @brief   Get and clears SIO event flags.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @return              The pending event flags.
 *
 * @notapi
 */
sioevents_t sio_lld_get_and_clear_events(SIODriver *siop) {
  sioevents_t events = 0U;

  (void)siop;

  return events;
}

/**
 * @brief   Returns the pending SIO event flags.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @return              The pending event flags.
 *
 * @notapi
 */
sioevents_t sio_lld_get_events(SIODriver *siop) {
  sioevents_t events = 0U;

  (void)siop;

  return events;
}

/**
 * @brief   Reads data from the RX FIFO.
 * @details The function is not blocking, it writes frames until there
 *          is space available without waiting.
 *
 * @param[in] siop          pointer to an @p SIODriver structure
 * @param[in] buffer        pointer to the buffer for read frames
 * @param[in] n             maximum number of frames to be read
 * @return                  The number of frames copied from the buffer.
 * @retval 0                if the TX FIFO is full.
 */
size_t sio_lld_read(SIODriver *siop, uint8_t *buffer, size_t n) {

  (void)siop;
  (void)buffer;

  return n;
}

/**
 * @brief   Writes data into the TX FIFO.
 * @details The function is not blocking, it writes frames until there
 *          is space available without waiting.
 *
 * @param[in] siop          pointer to an @p SIODriver structure
 * @param[in] buffer        pointer to the buffer for read frames
 * @param[in] n             maximum number of frames to be written
 * @return                  The number of frames copied from the buffer.
 * @retval 0                if the TX FIFO is full.
 */
size_t sio_lld_write(SIODriver *siop, const uint8_t *buffer, size_t n) {

  (void)siop;
  (void)buffer;

  return n;
}

/**
 * @brief   Returns one frame from the RX FIFO.
 * @note    If the FIFO is empty then the returned value is unpredictable.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @return              The frame from RX FIFO.
 *
 * @notapi
 */
msg_t sio_lld_get(SIODriver *siop) {
  msg_t msg = (msg_t)0;

  (void)siop;

  return msg;
}

/**
 * @brief   Pushes one frame into the TX FIFO.
 * @note    If the FIFO is full then the behavior is unpredictable.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @param[in] data      frame to be written
 *
 * @notapi
 */
void sio_lld_put(SIODriver *siop, uint_fast16_t data) {

  (void)siop;
  (void)data;
}

/**
 * @brief   Control operation on a serial port.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @param[in] operation control operation code
 * @param[in,out] arg   operation argument
 *
 * @return              The control operation status.
 * @retval MSG_OK       in case of success.
 * @retval MSG_TIMEOUT  in case of operation timeout.
 * @retval MSG_RESET    in case of operation reset.
 *
 * @notapi
 */
msg_t sio_lld_control(SIODriver *siop, unsigned int operation, void *arg) {

  (void)siop;
  (void)operation;
  (void)arg;

  return MSG_OK;
}

/**
 * @brief   Serves an UART interrupt.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 *
 * @notapi
 */
void sio_lld_serve_interrupt(SIODriver *siop) {

  (void)siop;
}

#endif /* HAL_USE_SIO == TRUE */

/** @} */