diff options
Diffstat (limited to 'bsps/arm/stm32h7/hal/stm32h7xx_hal_rng_ex.c')
| -rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_hal_rng_ex.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_hal_rng_ex.c b/bsps/arm/stm32h7/hal/stm32h7xx_hal_rng_ex.c new file mode 100644 index 0000000000..c71504ffa0 --- /dev/null +++ b/bsps/arm/stm32h7/hal/stm32h7xx_hal_rng_ex.c @@ -0,0 +1,299 @@ +/**
+ ******************************************************************************
+ * @file stm32h7xx_hal_rng_ex.c
+ * @author MCD Application Team
+ * @brief Extended RNG HAL module driver.
+ * This file provides firmware functions to manage the following
+ * functionalities of the Random Number Generator (RNG) peripheral:
+ * + Lock configuration functions
+ * + Reset the RNG
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright (c) 2017 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32h7xx_hal.h"
+
+/** @addtogroup STM32H7xx_HAL_Driver
+ * @{
+ */
+
+#if defined (RNG)
+
+/** @addtogroup RNGEx
+ * @brief RNG Extended HAL module driver.
+ * @{
+ */
+
+#ifdef HAL_RNG_MODULE_ENABLED
+#if defined (RNG_CR_CONDRST)
+/* Private types -------------------------------------------------------------*/
+/* Private defines -----------------------------------------------------------*/
+/** @defgroup RNGEx_Private_Defines
+ * @{
+ */
+/* Health test control register information to use in CCM algorithm */
+#define RNG_HTCFG_1 0x17590ABCU /*!< magic number */
+#if defined(RNG_VER_3_1) || defined(RNG_VER_3_0)
+#define RNG_HTCFG 0x000CAA74U /*!< for best latency and To be compliant with NIST */
+#else /*RNG_VER_3_2*/
+#define RNG_HTCFG 0x00007274U /*!< for best latency and To be compliant with NIST */
+#endif
+/**
+ * @}
+ */
+/* Private variables ---------------------------------------------------------*/
+/* Private constants ---------------------------------------------------------*/
+/** @defgroup RNGEx_Private_Constants RNG Private Constants
+ * @{
+ */
+#define RNG_TIMEOUT_VALUE 2U
+/**
+ * @}
+ */
+/* Private macros ------------------------------------------------------------*/
+/* Private functions prototypes ----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @addtogroup RNGEx_Exported_Functions
+ * @{
+ */
+
+/** @addtogroup RNGEx_Exported_Functions_Group1
+ * @brief Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Configuration and lock functions #####
+ ===============================================================================
+ [..] This section provides functions allowing to:
+ (+) Configure the RNG with the specified parameters in the RNG_ConfigTypeDef
+ (+) Lock RNG configuration Allows user to lock a configuration until next reset.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Configure the RNG with the specified parameters in the
+ * RNG_ConfigTypeDef.
+ * @param hrng pointer to a RNG_HandleTypeDef structure that contains
+ * the configuration information for RNG.
+ * @param pConf: pointer to a RNG_ConfigTypeDef structure that contains
+ * the configuration information for RNG module
+
+ * @retval HAL status
+*/
+HAL_StatusTypeDef HAL_RNGEx_SetConfig(RNG_HandleTypeDef *hrng, RNG_ConfigTypeDef *pConf)
+{
+ uint32_t tickstart;
+ uint32_t cr_value;
+ HAL_StatusTypeDef status ;
+
+ /* Check the RNG handle allocation */
+ if ((hrng == NULL) || (pConf == NULL))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_RNG_ALL_INSTANCE(hrng->Instance));
+ assert_param(IS_RNG_CLOCK_DIVIDER(pConf->ClockDivider));
+ assert_param(IS_RNG_NIST_COMPLIANCE(pConf->NistCompliance));
+ assert_param(IS_RNG_CONFIG1(pConf->Config1));
+ assert_param(IS_RNG_CONFIG2(pConf->Config2));
+ assert_param(IS_RNG_CONFIG3(pConf->Config3));
+
+ /* Check RNG peripheral state */
+ if (hrng->State == HAL_RNG_STATE_READY)
+ {
+ /* Change RNG peripheral state */
+ hrng->State = HAL_RNG_STATE_BUSY;
+
+ /* Disable RNG */
+ __HAL_RNG_DISABLE(hrng);
+
+ /* RNG CR register configuration. Set value in CR register for :
+ - NIST Compliance setting
+ - Clock divider value
+ - CONFIG 1, CONFIG 2 and CONFIG 3 values */
+
+ cr_value = (uint32_t)(pConf->ClockDivider | pConf->NistCompliance
+ | (pConf->Config1 << RNG_CR_RNG_CONFIG1_Pos)
+ | (pConf->Config2 << RNG_CR_RNG_CONFIG2_Pos)
+ | (pConf->Config3 << RNG_CR_RNG_CONFIG3_Pos));
+
+ MODIFY_REG(hrng->Instance->CR, RNG_CR_NISTC | RNG_CR_CLKDIV | RNG_CR_RNG_CONFIG1
+ | RNG_CR_RNG_CONFIG2 | RNG_CR_RNG_CONFIG3,
+ (uint32_t)(RNG_CR_CONDRST | cr_value));
+
+#if defined(RNG_VER_3_2) || defined(RNG_VER_3_1) || defined(RNG_VER_3_0)
+ /*!< magic number must be written immediately before to RNG_HTCRG */
+ WRITE_REG(hrng->Instance->HTCR, RNG_HTCFG_1);
+ /* for best latency and to be compliant with NIST */
+ WRITE_REG(hrng->Instance->HTCR, RNG_HTCFG);
+#endif
+
+ /* Writing bits CONDRST=0*/
+ CLEAR_BIT(hrng->Instance->CR, RNG_CR_CONDRST);
+ /* Get tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait for conditioning reset process to be completed */
+ while (HAL_IS_BIT_SET(hrng->Instance->CR, RNG_CR_CONDRST))
+ {
+ if ((HAL_GetTick() - tickstart) > RNG_TIMEOUT_VALUE)
+ {
+ hrng->State = HAL_RNG_STATE_READY;
+ hrng->ErrorCode = HAL_RNG_ERROR_TIMEOUT;
+ return HAL_ERROR;
+ }
+ }
+
+ /* Enable RNG */
+ __HAL_RNG_ENABLE(hrng);
+
+ /* Initialize the RNG state */
+ hrng->State = HAL_RNG_STATE_READY;
+
+ /* function status */
+ status = HAL_OK;
+ }
+ else
+ {
+ hrng->ErrorCode = HAL_RNG_ERROR_BUSY;
+ status = HAL_ERROR;
+ }
+
+ /* Return the function status */
+ return status;
+}
+
+/**
+ * @brief Get the RNG Configuration and fill parameters in the
+ * RNG_ConfigTypeDef.
+ * @param hrng pointer to a RNG_HandleTypeDef structure that contains
+ * the configuration information for RNG.
+ * @param pConf: pointer to a RNG_ConfigTypeDef structure that contains
+ * the configuration information for RNG module
+
+ * @retval HAL status
+*/
+HAL_StatusTypeDef HAL_RNGEx_GetConfig(RNG_HandleTypeDef *hrng, RNG_ConfigTypeDef *pConf)
+{
+
+ HAL_StatusTypeDef status ;
+
+ /* Check the RNG handle allocation */
+ if ((hrng == NULL) || (pConf == NULL))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check RNG peripheral state */
+ if (hrng->State == HAL_RNG_STATE_READY)
+ {
+ /* Change RNG peripheral state */
+ hrng->State = HAL_RNG_STATE_BUSY;
+
+ /* Get RNG parameters */
+ pConf->Config1 = (uint32_t)((hrng->Instance->CR & RNG_CR_RNG_CONFIG1) >> RNG_CR_RNG_CONFIG1_Pos) ;
+ pConf->Config2 = (uint32_t)((hrng->Instance->CR & RNG_CR_RNG_CONFIG2) >> RNG_CR_RNG_CONFIG2_Pos);
+ pConf->Config3 = (uint32_t)((hrng->Instance->CR & RNG_CR_RNG_CONFIG3) >> RNG_CR_RNG_CONFIG3_Pos);
+ pConf->ClockDivider = (hrng->Instance->CR & RNG_CR_CLKDIV);
+ pConf->NistCompliance = (hrng->Instance->CR & RNG_CR_NISTC);
+
+ /* Initialize the RNG state */
+ hrng->State = HAL_RNG_STATE_READY;
+
+ /* function status */
+ status = HAL_OK;
+ }
+ else
+ {
+ hrng->ErrorCode |= HAL_RNG_ERROR_BUSY;
+ status = HAL_ERROR;
+ }
+
+ /* Return the function status */
+ return status;
+}
+
+/**
+ * @brief RNG current configuration lock.
+ * @note This function allows to lock RNG peripheral configuration.
+ * Once locked, HW RNG reset has to be perfomed prior any further
+ * configuration update.
+ * @param hrng pointer to a RNG_HandleTypeDef structure that contains
+ * the configuration information for RNG.
+ * @retval HAL status
+*/
+HAL_StatusTypeDef HAL_RNGEx_LockConfig(RNG_HandleTypeDef *hrng)
+{
+ HAL_StatusTypeDef status;
+
+ /* Check the RNG handle allocation */
+ if (hrng == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check RNG peripheral state */
+ if (hrng->State == HAL_RNG_STATE_READY)
+ {
+ /* Change RNG peripheral state */
+ hrng->State = HAL_RNG_STATE_BUSY;
+
+ /* Perform RNG configuration Lock */
+ MODIFY_REG(hrng->Instance->CR, RNG_CR_CONFIGLOCK, RNG_CR_CONFIGLOCK);
+
+ /* Change RNG peripheral state */
+ hrng->State = HAL_RNG_STATE_READY;
+
+ /* function status */
+ status = HAL_OK;
+ }
+ else
+ {
+ hrng->ErrorCode = HAL_RNG_ERROR_BUSY;
+ status = HAL_ERROR;
+ }
+
+ /* Return the function status */
+ return status;
+}
+
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* CONDRST */
+#endif /* HAL_RNG_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+#endif /* RNG */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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