| /* |
| * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved. |
| * |
| * 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 drv_trng.h |
| * @brief header file for trng driver |
| * @version V1.0 |
| * @date 02. June 2017 |
| ******************************************************************************/ |
| #ifndef _CSI_TRNG_H_ |
| #define _CSI_TRNG_H_ |
| |
| #include "drv_common.h" |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include <stdint.h> |
| |
| |
| /// definition for trng handle. |
| typedef void *trng_handle_t; |
| /****** TRNG specific error codes *****/ |
| typedef enum { |
| TRNG_ERROR_MODE = 0, ///< Specified Mode not supported |
| } drv_trng_error_e; |
| |
| /*----- TRNG Control Codes: Mode -----*/ |
| typedef enum { |
| TRNG_MODE_LOWPOWER = 0, ///< TRNG Low power Mode |
| TRNG_MODE_NORMAL ///< TRNG Normal Mode |
| } trng_mode_e; |
| |
| /** |
| \brief TRNG Status |
| */ |
| typedef struct { |
| uint32_t busy : 1; |
| uint32_t data_valid : 1; ///< Data is valid flag |
| } trng_status_t; |
| |
| /****** TRNG Event *****/ |
| typedef enum { |
| TRNG_EVENT_DATA_GENERATE_COMPLETE = 0 ///< Get data from TRNG success |
| } trng_event_e; |
| typedef void (*trng_event_cb_t)(trng_event_e event); ///< Pointer to \ref trng_event_cb_t : TRNG Event call back. |
| |
| /** |
| \brief TRNG Device Driver Capabilities. |
| */ |
| typedef struct { |
| uint32_t lowper_mode : 1; ///< supports low power mode |
| } trng_capabilities_t; |
| |
| // Function documentation |
| |
| /** |
| \brief get trng handle count. |
| \return trng handle count |
| */ |
| int32_t csi_trng_get_instance_count(void); |
| |
| /** |
| \brief Initialize TRNG Interface. 1. Initializes the resources needed for the TRNG interface 2.registers event callback function |
| \param[in] idx must not exceed return value of csi_trng_get_instance_count() |
| \param[in] cb_event Pointer to \ref trng_event_cb_t |
| \return pointer to trng handle |
| */ |
| trng_handle_t csi_trng_initialize(int32_t idx, trng_event_cb_t cb_event); |
| |
| /** |
| \brief De-initialize TRNG Interface. stops operation and releases the software resources used by the interface |
| \param[in] handle trng handle to operate. |
| \return error code |
| */ |
| int32_t csi_trng_uninitialize(trng_handle_t handle); |
| |
| /** |
| \brief Get driver capabilities. |
| \param[in] handle trng handle to operate. |
| \return \ref trng_capabilities_t |
| */ |
| trng_capabilities_t csi_trng_get_capabilities(trng_handle_t handle); |
| |
| /** |
| \brief Get data from the TRNG. |
| \param[in] handle trng handle to operate. |
| \param[out] data Pointer to buffer with data get from TRNG |
| \param[in] num Number of data items to obtain |
| \return error code |
| */ |
| int32_t csi_trng_get_data(trng_handle_t handle, void *data, uint32_t num); |
| |
| /** |
| \brief Get TRNG status. |
| \param[in] handle trng handle to operate. |
| \return TRNG status \ref trng_status_t |
| */ |
| trng_status_t csi_trng_get_status(trng_handle_t handle); |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _CSI_TRNG_H_ */ |