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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
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.
*/
#include "hal.h"
#if (HAL_USE_CRY == TRUE) || defined(__DOXYGEN__)
#include "sama_crypto_lld.h"
#if defined(SAMA_DMA_REQUIRED)
static void crypto_lld_serve_read_interrupt(CRYDriver *cryp, uint32_t flags);
static void crypto_lld_serve_write_interrupt(CRYDriver *cryp, uint32_t flags);
#endif
/**
* @brief Wakes up the waiting thread.
*
* @param[in] cryp pointer to the @p CRYDRiver object
*
* @notapi
*/
#define _cry_wakeup_isr(cryp) { \
osalSysLockFromISR(); \
osalThreadResumeI(&cryp->thread, MSG_OK); \
osalSysUnlockFromISR(); \
}
/**
* @brief Common ISR code.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
#define _cry_isr_code(cryp) { \
_cry_wakeup_isr(cryp); \
}
void samaCryptoDriverInit(CRYDriver *cryp) {
cryp->enabledPer = 0;
cryp->thread = NULL;
osalMutexObjectInit(&cryp->mutex);
}
void samaCryptoDriverStart(CRYDriver *cryp) {
if (cryp->config->transfer_mode == TRANSFER_DMA)
{
#if defined(SAMA_DMA_REQUIRED)
cryp->dmarx = dmaChannelAllocate(SAMA_CRY_CRYD1_DMA_IRQ_PRIORITY,
(sama_dmaisr_t) crypto_lld_serve_read_interrupt, (void *) cryp);
osalDbgAssert(cryp->dmarx != NULL, "no channel allocated");
cryp->dmatx = dmaChannelAllocate(SAMA_CRY_CRYD1_DMA_IRQ_PRIORITY,
(sama_dmaisr_t) crypto_lld_serve_write_interrupt, (void *) cryp);
osalDbgAssert(cryp->dmatx != NULL, "no channel allocated");
#endif
}
}
void samaCryptoDriverStop(CRYDriver *cryp) {
#if defined(SAMA_DMA_REQUIRED)
if (cryp->config->transfer_mode == TRANSFER_DMA)
{
dmaChannelRelease(cryp->dmarx);
dmaChannelRelease(cryp->dmatx);
}
#endif
samaCryptoDriverDisable(cryp);
}
void samaCryptoDriverDisable(CRYDriver *cryp)
{
if ((cryp->enabledPer & AES_PER)) {
cryp->enabledPer &= ~AES_PER;
pmcDisableAES();
}
if ((cryp->enabledPer & TDES_PER)) {
cryp->enabledPer &= ~TDES_PER;
pmcDisableDES();
}
if ((cryp->enabledPer & SHA_PER)) {
cryp->enabledPer &= ~SHA_PER;
pmcDisableSHA();
}
if ((cryp->enabledPer & TRNG_PER)) {
cryp->enabledPer &= ~TRNG_PER;
TRNG->TRNG_CR = TRNG_CR_KEY_PASSWD;
pmcDisableTRNG();
}
}
#if defined(SAMA_DMA_REQUIRED)
/**
* @brief Shared end-of-rx service routine.
*
* @param[in] cryp pointer to the @p CRYDriver object
* @param[in] flags pre-shifted content of the ISR register
*/
static void crypto_lld_serve_read_interrupt(CRYDriver *cryp, uint32_t flags) {
/* DMA errors handling.*/
#if defined(SAMA_CRY_DMA_ERROR_HOOK)
if ((flags & (XDMAC_CIS_RBEIS | XDMAC_CIS_ROIS)) != 0) {
SAMA_CRY_DMA_ERROR_HOOK(cryp);
}
#else
(void)flags;
#endif
/* Stop everything.*/
dmaChannelDisable(cryp->dmatx);
dmaChannelDisable(cryp->dmarx);
/* Portable CRY ISR code defined in the high level driver, note, it is
a macro.*/
_cry_isr_code(cryp);
}
/**
* @brief Shared end-of-tx service routine.
*
* @param[in] cryp pointer to the @p CRYDriver object
* @param[in] flags pre-shifted content of the ISR register
*/
static void crypto_lld_serve_write_interrupt(CRYDriver *cryp, uint32_t flags) {
/* DMA errors handling.*/
#if defined(SAMA_CRY_DMA_ERROR_HOOK)
(void)cryp;
if ((flags & (XDMAC_CIS_WBEIS | XDMAC_CIS_ROIS)) != 0) {
SAMA_CRY_DMA_ERROR_HOOK(cryp);
}
#else
(void)cryp;
(void)flags;
#endif
}
#endif
#endif /* HAL_USE_CRY */
/** @} */
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