/*
    ChibiOS/RT - Copyright (C) 2006-2013 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    STM32/USARTv2/serial_lld.h
 * @brief   STM32 low level serial driver header.
 *
 * @addtogroup SERIAL
 * @{
 */

#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_

#if HAL_USE_SERIAL || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/

/**
 * @name    Configuration options
 * @{
 */
/**
 * @brief   USART1 driver enable switch.
 * @details If set to @p TRUE the support for USART1 is included.
 * @note    The default is @p TRUE.
 */
#if !defined(STM32_SERIAL_USE_USART1) || defined(__DOXYGEN__)
#define STM32_SERIAL_USE_USART1             FALSE
#endif

/**
 * @brief   USART2 driver enable switch.
 * @details If set to @p TRUE the support for USART2 is included.
 * @note    The default is @p TRUE.
 */
#if !defined(STM32_SERIAL_USE_USART2) || defined(__DOXYGEN__)
#define STM32_SERIAL_USE_USART2             FALSE
#endif

/**
 * @brief   USART3 driver enable switch.
 * @details If set to @p TRUE the support for USART3 is included.
 * @note    The default is @p TRUE.
 */
#if !defined(STM32_SERIAL_USE_USART3) || defined(__DOXYGEN__)
#define STM32_SERIAL_USE_USART3             FALSE
#endif

/**
 * @brief   UART4 driver enable switch.
 * @details If set to @p TRUE the support for UART4 is included.
 * @note    The default is @p TRUE.
 */
#if !defined(STM32_SERIAL_USE_UART4) || defined(__DOXYGEN__)
#define STM32_SERIAL_USE_UART4              FALSE
#endif

/**
 * @brief   UART5 driver enable switch.
 * @details If set to @p TRUE the support for UART5 is included.
 * @note    The default is @p TRUE.
 */
#if !defined(STM32_SERIAL_USE_UART5) || defined(__DOXYGEN__)
#define STM32_SERIAL_USE_UART5              FALSE
#endif

/**
 * @brief   USART6 driver enable switch.
 * @details If set to @p TRUE the support for USART6 is included.
 * @note    The default is @p TRUE.
 */
#if !defined(STM32_SERIAL_USE_USART6) || defined(__DOXYGEN__)
#define STM32_SERIAL_USE_USART6             FALSE
#endif

/**
 * @brief   USART1 interrupt priority level setting.
 */
#if !defined(STM32_SERIAL_USART1_PRIORITY) || defined(__DOXYGEN__)
#define STM32_SERIAL_USART1_PRIORITY        12
#endif

/**
 * @brief   USART2 interrupt priority level setting.
 */
#if !defined(STM32_SERIAL_USART2_PRIORITY) || defined(__DOXYGEN__)
#define STM32_SERIAL_USART2_PRIORITY        12
#endif

/**
 * @brief   USART3 interrupt priority level setting.
 */
#if !defined(STM32_SERIAL_USART3_PRIORITY) || defined(__DOXYGEN__)
#define STM32_SERIAL_USART3_PRIORITY        12
#endif

/**
 * @brief   UART4 interrupt priority level setting.
 */
#if !defined(STM32_SERIAL_UART4_PRIORITY) || defined(__DOXYGEN__)
#define STM32_SERIAL_UART4_PRIORITY         12
#endif

/**
 * @brief   UART5 interrupt priority level setting.
 */
#if !defined(STM32_SERIAL_UART5_PRIORITY) || defined(__DOXYGEN__)
#define STM32_SERIAL_UART5_PRIORITY         12
#endif

/**
 * @brief   USART6 interrupt priority level setting.
 */
#if !defined(STM32_SERIAL_USART6_PRIORITY) || defined(__DOXYGEN__)
#define STM32_SERIAL_USART6_PRIORITY        12
#endif
/** @} */

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

#if STM32_SERIAL_USE_USART1 && !STM32_HAS_USART1
#error "USART1 not present in the selected device"
#endif

#if STM32_SERIAL_USE_USART2 && !STM32_HAS_USART2
#error "USART2 not present in the selected device"
#endif

#if STM32_SERIAL_USE_USART3 && !STM32_HAS_USART3
#error "USART3 not present in the selected device"
#endif

#if STM32_SERIAL_USE_UART4 && !STM32_HAS_UART4
#error "UART4 not present in the selected device"
#endif

#if STM32_SERIAL_USE_UART5 && !STM32_HAS_UART5
#error "UART5 not present in the selected device"
#endif

#if STM32_SERIAL_USE_USART6 && !STM32_HAS_USART6
#error "USART6 not present in the selected device"
#endif

#if !STM32_SERIAL_USE_USART1 && !STM32_SERIAL_USE_USART2 &&                 \
    !STM32_SERIAL_USE_USART3 && !STM32_SERIAL_USE_UART4  &&                 \
    !STM32_SERIAL_USE_UART5  && !STM32_SERIAL_USE_USART6
#error "SERIAL driver activated but no USART/UART peripheral assigned"
#endif

#if STM32_SERIAL_USE_USART1 &&                                              \
    !CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_SERIAL_USART1_PRIORITY)
#error "Invalid IRQ priority assigned to USART1"
#endif

#if STM32_SERIAL_USE_USART2 &&                                              \
    !CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_SERIAL_USART2_PRIORITY)
#error "Invalid IRQ priority assigned to USART2"
#endif

#if STM32_SERIAL_USE_USART3 &&                                              \
    !CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_SERIAL_USART3_PRIORITY)
#error "Invalid IRQ priority assigned to USART3"
#endif

#if STM32_SERIAL_USE_UART4 &&                                               \
    !CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_SERIAL_UART4_PRIORITY)
#error "Invalid IRQ priority assigned to UART4"
#endif

#if STM32_SERIAL_USE_UART5 &&                                               \
    !CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_SERIAL_UART5_PRIORITY)
#error "Invalid IRQ priority assigned to UART5"
#endif

#if STM32_SERIAL_USE_USART6 &&                                              \
    !CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_SERIAL_USART6_PRIORITY)
#error "Invalid IRQ priority assigned to USART6"
#endif

/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/

/**
 * @brief   STM32 Serial Driver configuration structure.
 * @details An instance of this structure must be passed to @p sdStart()
 *          in order to configure and start a serial driver operations.
 * @note    This structure content is architecture dependent, each driver
 *          implementation defines its own version and the custom static
 *          initializers.
 */
typedef struct {
  /**
   * @brief Bit rate.
   */
  uint32_t                  speed;
  /* End of the mandatory fields.*/
  /**
   * @brief Initialization value for the CR1 register.
   */
  uint32_t                  cr1;
  /**
   * @brief Initialization value for the CR2 register.
   */
  uint32_t                  cr2;
  /**
   * @brief Initialization value for the CR3 register.
   */
  uint32_t                  cr3;
} SerialConfig;

/**
 * @brief   @p SerialDriver specific data.
 */
#define _serial_driver_data                                                 \
  _base_asynchronous_channel_data                                           \
  /* Driver state.*/                                                        \
  sdstate_t                 state;                                          \
  /* Input queue.*/                                                         \
  InputQueue                iqueue;                                         \
  /* Output queue.*/                                                        \
  OutputQueue               oqueue;                                         \
  /* Input circular buffer.*/                                               \
  uint8_t                   ib[SERIAL_BUFFERS_SIZE];                        \
  /* Output circular buffer.*/                                              \
  uint8_t                   ob[SERIAL_BUFFERS_SIZE];                        \
  /* End of the mandatory fields.*/                                         \
  /* Pointer to the USART registers block.*/                                \
  USART_TypeDef             *usart;                                         \
  /* Clock frequency for the associated USART/UART.*/                       \
  uint32_t                  clock;

/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/

/*
 * Extra USARTs definitions here (missing from the ST header file).
 */
#define USART_CR2_STOP1_BITS    (0 << 12)   /**< @brief CR2 1 stop bit value.*/
#define USART_CR2_STOP0P5_BITS  (1 << 12)   /**< @brief CR2 0.5 stop bit value.*/
#define USART_CR2_STOP2_BITS    (2 << 12)   /**< @brief CR2 2 stop bit value.*/
#define USART_CR2_STOP1P5_BITS  (3 << 12)   /**< @brief CR2 1.5 stop bit value.*/

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#if STM32_SERIAL_USE_USART1 && !defined(__DOXYGEN__)
extern SerialDriver SD1;
#endif
#if STM32_SERIAL_USE_USART2 && !defined(__DOXYGEN__)
extern SerialDriver SD2;
#endif
#if STM32_SERIAL_USE_USART3 && !defined(__DOXYGEN__)
extern SerialDriver SD3;
#endif
#if STM32_SERIAL_USE_UART4 && !defined(__DOXYGEN__)
extern SerialDriver SD4;
#endif
#if STM32_SERIAL_USE_UART5 && !defined(__DOXYGEN__)
extern SerialDriver SD5;
#endif
#if STM32_SERIAL_USE_USART6 && !defined(__DOXYGEN__)
extern SerialDriver SD6;
#endif

#ifdef __cplusplus
extern "C" {
#endif
  void sd_lld_init(void);
  void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
  void sd_lld_stop(SerialDriver *sdp);
#ifdef __cplusplus
}
#endif

#endif /* HAL_USE_SERIAL */

#endif /* _SERIAL_LLD_H_ */

/** @} */
