/**
  *********************************************************************************
  *
  * @file    ald_trng.h
  * @brief   Header file of TRNG module driver.
  *
  * @version V1.0
  * @date    26 Jun 2019
  * @author  AE Team
  * @note
  *          Change Logs:
  *          Date            Author          Notes
  *          26 Jun 2019     AE Team         The first version
  *
  * Copyright (C) Shanghai Eastsoft Microelectronics Co. Ltd. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * 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
  *
  * 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.
  **********************************************************************************
  */

#ifndef __ALD_TRNG_H__
#define __ALD_TRNG_H__

#ifdef __cplusplus
extern "C" {
#endif

#include "utils.h"


/** @addtogroup ES32FXXX_ALD
  * @{
  */

/** @addtogroup TRNG
  * @{
  */

/** @defgroup TRNG_Public_Types TRNG Public Types
  * @{
  */
/**
  * @brief Data width
  */
typedef enum {
	TRNG_DSEL_1B  = 0x0U,	/**< 1-bit */
	TRNG_DSEL_8B  = 0x1U,	/**< 8-bits */
	TRNG_DSEL_16B = 0x2U,	/**< 16-bits */
	TRNG_DSEL_32B = 0x3U,	/**< 32-bits */
} trng_data_width_t;

/**
  * @brief seed type
  */
typedef enum {
	TRNG_SEED_TYPE_0    = 0x0U,	/**< Using 0 as seed */
	TRNG_SEED_TYPE_1    = 0x1U,	/**< Using 1 as seed */
	TRNG_SEED_TYPE_LAST = 0x2U,	/**< Using last seed */
	TRNG_SEED_TYPE_SEED = 0x3U,	/**< Using value of register */
} trng_seed_type_t;

/**
  * @brief TRNG init structure definition
  */
typedef struct {
	trng_data_width_t data_width;	/**< The width of data */
	trng_seed_type_t seed_type;	/**< The seed type */
	uint32_t seed;			/**< The value of seed */
	uint16_t t_start;		/**< T(start) = T(trng) * 2 ^ (t_start + 1), T(start) > 1ms */
	uint8_t adjc;			/**< Adjust parameter */
	type_func_t posten;		/**< Data back handle function  */
} trng_init_t;

/**
  * @brief TRNG state structures definition
  */
typedef enum {
	TRNG_STATE_RESET = 0x0U,	/**< Peripheral is not initialized */
	TRNG_STATE_READY = 0x1U,	/**< Peripheral Initialized and ready for use */
	TRNG_STATE_BUSY  = 0x2U,	/**< An internal process is ongoing */
	TRNG_STATE_ERROR = 0x4U,	/**< Error */
} trng_state_t;

/**
  * @brief State type
  */
typedef enum {
	TRNG_STATUS_START = (1U << 0),	/**< Start state */
	TRNG_STATUS_DAVLD = (1U << 1),	/**< Data valid state */
	TRNG_STATUS_SERR  = (1U << 2),	/**< Error state */
} trng_status_t;

/**
  * @brief Interrupt type
  */
typedef enum {
	TRNG_IT_START = (1U << 0),	/**< Start */
	TRNG_IT_DAVLD = (1U << 1),	/**< Data valid */
	TRNG_IT_SERR  = (1U << 2),	/**< Error */
} trng_it_t;

/**
  * @brief Interrupt flag type
  */
typedef enum {
	TRNG_IF_START = (1U << 0),	/**< Start */
	TRNG_IF_DAVLD = (1U << 1),	/**< Data valid */
	TRNG_IF_SERR  = (1U << 2),	/**< Error */
} trng_flag_t;

/**
  * @brief  TRNG Handle Structure definition
  */
typedef struct trng_handle_s {
	TRNG_TypeDef *perh;	/**< Register base address */
	trng_init_t init;	/**< TRNG required parameters */
	uint32_t data;		/**< result data */
	lock_state_t lock; 	/**< Locking object */
	trng_state_t state;	/**< TRNG operation state */

	void (*trng_cplt_cbk)(struct trng_handle_s *arg); /**< Trng completed callback */
	void (*err_cplt_cbk)(struct trng_handle_s *arg);  /**< Trng error callback */
	void (*init_cplt_cbk)(struct trng_handle_s *arg); /**< Trng init completed callback */
} trng_handle_t;
/**
  * @}
  */

/** @defgroup TRNG_Public_Macros TRNG Public Macros
  * @{
  */
#define TRNG_ENABLE()		(SET_BIT(TRNG->CR, TRNG_CR_TRNGEN_MSK))
#define TRNG_DISABLE()		(CLEAR_BIT(TRNG->CR, TRNG_CR_TRNGEN_MSK))
#define TRNG_ADJM_ENABLE()	(SET_BIT(TRNG->CR, TRNG_CR_ADJM_MSK))
#define TRNG_ADJM_DISABLE()	(CLEAR_BIT(TRNG->CR, TRNG_CR_ADJM_MSK))
/**
  * @}
  */

/**
  * @defgroup TRNG_Private_Macros TRNG Private Macros
  * @{
  */
#define IS_TRNG_DATA_WIDTH(x)	(((x) == TRNG_DSEL_1B)  || \
                                 ((x) == TRNG_DSEL_8B)  || \
                                 ((x) == TRNG_DSEL_16B) || \
                                 ((x) == TRNG_DSEL_32B))
#define IS_TRNG_SEED_TYPE(x)	(((x) == TRNG_SEED_TYPE_0)    || \
                                 ((x) == TRNG_SEED_TYPE_1)    || \
                                 ((x) == TRNG_SEED_TYPE_LAST) || \
                                 ((x) == TRNG_SEED_TYPE_SEED))
#define IS_TRNG_STATUS(x)	(((x) == TRNG_STATUS_START)  || \
                                 ((x) == TRNG_STATUS_DAVLD)  || \
                                 ((x) == TRNG_STATUS_SERR))
#define IS_TRNG_IT(x)		(((x) == TRNG_IT_START)  || \
                                 ((x) == TRNG_IT_DAVLD)  || \
                                 ((x) == TRNG_IT_SERR))
#define IS_TRNG_FLAG(x)		(((x) == TRNG_IF_START)  || \
                                 ((x) == TRNG_IF_DAVLD)  || \
                                 ((x) == TRNG_IF_SERR))
#define IS_TRNG_ADJC(x)		((x) < 4)
#define IS_TRNG_T_START(x)	((x) < 8)
/**
  * @}
  */

/** @addtogroup TRNG_Public_Functions
  * @{
  */
/** @addtogroup TRNG_Public_Functions_Group1
  * @{
  */
/* Initialization functions */
extern ald_status_t ald_trng_init(trng_handle_t *hperh);
/**
  * @}
  */
/** @addtogroup TRNG_Public_Functions_Group2
  * @{
  */
/* Control functions */
extern uint32_t ald_trng_get_result(trng_handle_t *hperh);
extern void ald_trng_interrupt_config(trng_handle_t *hperh, trng_it_t it, type_func_t state);
extern flag_status_t ald_trng_get_status(trng_handle_t *hperh, trng_status_t status);
extern it_status_t ald_trng_get_it_status(trng_handle_t *hperh, trng_it_t it);
extern flag_status_t ald_trng_get_flag_status(trng_handle_t *hperh, trng_flag_t flag);
extern void ald_trng_clear_flag_status(trng_handle_t *hperh, trng_flag_t flag);
extern void ald_trng_irq_handler(trng_handle_t *hperh);
/**
  * @}
  */
/**
  * @}
  */
/**
  * @}
  */
/**
  * @}
  */
#ifdef __cplusplus
}
#endif

#endif /* __ALD_TRNG_H__ */