text: /**
   * Copyright (c) 2018, Nordic Semiconductor ASA
   *
   *
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form, except as embedded into a Nordic
   *    Semiconductor ASA integrated circuit in a product or a software update for
   *    such product, must reproduce the above copyright notice, this list of
   *    conditions and the following disclaimer in the documentation and/or other
   *    materials provided with the distribution.
   *
   * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   *
   * 4. This software, with or without modification, must only be used with a
   *    Nordic Semiconductor ASA integrated circuit.
   *
   * 5. Any software provided in binary form under this license must not be reverse
   *    engineered, decompiled, modified and/or disassembled.
   *
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #include "sdk_common.h"
  #if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310)
  
  #include "nrf.h"
  #include "nrf_crypto_init.h"
  #include "cc310_backend_shared.h"
  #include "sns_silib.h"
  #include "cc310_backend_mutex.h"
  #include "nrf_crypto_rng.h"
  
  /**@internal @brief Function to enable CC310 (in HW)
   */
  void cc310_backend_enable(void);
  
  
  /**@internal @brief Function to disable CC310 (in HW)
   */
  void cc310_backend_disable(void);
  
  static uint32_t init_result_get(uint32_t crys_error)
  {
      uint32_t ret_val = NRF_ERROR_INTERNAL;
      switch (crys_error)
      {
          case CRYS_OK:
              ret_val = NRF_SUCCESS;
              break;
  
          default:
              ret_val = NRF_ERROR_INTERNAL;
              break;
      }
  
      return ret_val;
  }
  
  static ret_code_t cc310_backend_init(void)
  {
      uint32_t    ret_val;
      CRYSError_t crys_error;
  
      cc310_backend_mutex_init();
  
      // Enable the CC310 HW.
      NRF_CRYPTOCELL->ENABLE = 1;
  
      // Initialize the CC310 run-time library
      crys_error = SaSi_LibInit();
  
      // Shut down CC310 after initialization.
      NRF_CRYPTOCELL->ENABLE = 0;
  
      ret_val = init_result_get(crys_error);
      VERIFY_SUCCESS(ret_val);
  
  #if defined(NRF_CRYPTO_RNG_AUTO_INIT_ENABLED) && (NRF_CRYPTO_RNG_AUTO_INIT_ENABLED == 1)
  
      ret_val = nrf_crypto_rng_init(NULL, NULL);
      VERIFY_SUCCESS(ret_val);
  
  #elif defined(NRF_CRYPTO_RNG_AUTO_INIT_ENABLED) && (NRF_CRYPTO_RNG_AUTO_INIT_ENABLED == 0)
  
      // Do nothing
  
  #else
  
      #warning NRF_CRYPTO_RNG_AUTO_INIT_ENABLED define not found in sdk_config.h (Is the sdk_config.h valid?).
  
  #endif // NRF_CRYPTO_RNG_AUTO_INIT_ENABLED
  
      return ret_val;
  }
  
  
  static ret_code_t cc310_backend_uninit(void)
  {
  #if defined(NRF_CRYPTO_RNG_AUTO_INIT_ENABLED) && (NRF_CRYPTO_RNG_AUTO_INIT_ENABLED == 1)
  
      uint32_t ret_val;
      ret_val = nrf_crypto_rng_init(NULL, NULL);
      VERIFY_SUCCESS(ret_val);
  
  #elif defined(NRF_CRYPTO_RNG_AUTO_INIT_ENABLED) && (NRF_CRYPTO_RNG_AUTO_INIT_ENABLED == 0)
  
      // Do nothing
  
  #else
  
      #warning NRF_CRYPTO_RNG_AUTO_INIT_ENABLED define not found in sdk_config.h (Is the sdk_config.h valid?).
  
  #endif // NRF_CRYPTO_RNG_AUTO_INIT_ENABLED
  
      // Initialize the CC310 HW to do shutdown.
      NRF_CRYPTOCELL->ENABLE = 1;
  
      SaSi_LibFini();
  
      // Shut down CC310 after shutdown.
      NRF_CRYPTOCELL->ENABLE = 0;
  
      return NRF_SUCCESS;
  }
  
  
  CRYPTO_BACKEND_REGISTER(nrf_crypto_backend_info_t const cc310_backend) =
  {
      .init_fn    = cc310_backend_init,
      .uninit_fn  = cc310_backend_uninit,
  };
  
  #endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310)
  