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/**
*
* \file
*
* \brief SAM Advanced Encryption Standard driver.
*
* This file defines a useful set of functions for the AES on SAM devices.
*
* Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* 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 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. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#ifndef AES_CALLBACK_H_INCLUDED
#define AES_CALLBACK_H_INCLUDED
#ifdef __cplusplus
extern "C" {
#endif
#include <compiler.h>
#include <system_interrupt.h>
/**
* \addtogroup asfdoc_sam0_drivers_aes_group
*
* @{
*/
/** AES interrupt callback function type. */
typedef void (*aes_callback_t)(void);
/** AES callback type. */
enum aes_callback_type {
/** Encryption complete callback */
AES_CALLBACK_ENCRYPTION_COMPLETE = 0,
/** GF Multiplication Complete callback */
AES_CALLBACK_GF_MULTI_COMPLETE = 1,
};
/** \name Callback Configuration and Initialization
* @{
*/
enum status_code aes_register_callback(
const aes_callback_t callback,
const enum aes_callback_type type);
enum status_code aes_unregister_callback(
const aes_callback_t callback,
const enum aes_callback_type type);
/** @} */
/** \name Callback Enabling and Disabling
* @{
*/
/**
* \brief Enable an AES callback.
*
* \param[in,out] module Pointer to the software instance struct
* \param[in] type Callback source type
*
* \return Status of the callback enable operation.
* \retval STATUS_OK The callback was enabled successfully
* \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
*/
static inline enum status_code aes_enable_callback(struct aes_module *const module,
const enum aes_callback_type type)
{
system_interrupt_enable(SYSTEM_INTERRUPT_MODULE_AES);
if (type == AES_CALLBACK_ENCRYPTION_COMPLETE){
module->hw->INTENSET.reg = AES_INTENSET_ENCCMP;
} else if (type == AES_CALLBACK_GF_MULTI_COMPLETE){
module->hw->INTENSET.reg = AES_INTENSET_GFMCMP;
} else {
Assert(false);
return STATUS_ERR_INVALID_ARG;
}
return STATUS_OK;
}
/**
* \brief Disable an AES callback.
*
* \param[in,out] module Pointer to the software instance struct
* \param[in] type Callback source type
*
* \return Status of the callback enable operation.
* \retval STATUS_OK The callback was enabled successfully
* \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
*/
static inline enum status_code aes_disable_callback(struct aes_module *const module,
const enum aes_callback_type type)
{
system_interrupt_disable(SYSTEM_INTERRUPT_MODULE_AES);
if (type == AES_CALLBACK_ENCRYPTION_COMPLETE){
module->hw->INTENCLR.reg = AES_INTENCLR_ENCCMP;
} else if (type == AES_CALLBACK_GF_MULTI_COMPLETE){
module->hw->INTENCLR.reg = AES_INTENCLR_GFMCMP;
} else {
Assert(false);
return STATUS_ERR_INVALID_ARG;
}
return STATUS_OK;
}
/** @} */
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* AES_CALLBACK_H_INCLUDED */
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