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/*
* Copyright 2017 NXP
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 "fsl_bee.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/*******************************************************************************
* Variables
******************************************************************************/
/*******************************************************************************
* Code
******************************************************************************/
static void aligned_memcpy(void *dst, const void *src, size_t size)
{
register uint32_t *to32 = (uint32_t *)(uintptr_t)dst;
register const uint32_t *from32 = (const uint32_t *)(uintptr_t)src;
while (size >= sizeof(uint32_t))
{
*to32 = *from32;
size -= sizeof(uint32_t);
to32++;
from32++;
}
}
void BEE_Init(BEE_Type *base)
{
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
CLOCK_EnableClock(kCLOCK_Bee);
#endif
base->CTRL = BEE_CTRL_CTRL_SFTRST_N_MASK | BEE_CTRL_CTRL_CLK_EN_MASK;
}
void BEE_Deinit(BEE_Type *base)
{
base->CTRL &=
~(BEE_CTRL_BEE_ENABLE_MASK | BEE_CTRL_CTRL_SFTRST_N_MASK | BEE_CTRL_CTRL_CLK_EN_MASK | BEE_CTRL_KEY_VALID_MASK);
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
CLOCK_DisableClock(kCLOCK_Bee);
#endif
}
void BEE_GetDefaultConfig(bee_region_config_t *config)
{
assert(config);
config->mode = kBEE_AesEcbMode;
config->regionBot = 0U;
config->regionTop = 0U;
config->addrOffset = 0xF0000000U;
config->regionEn = kBEE_RegionDisabled;
}
status_t BEE_SetRegionConfig(BEE_Type *base, bee_region_t region, const bee_region_config_t *config)
{
IOMUXC_GPR_Type *iomuxc = IOMUXC_GPR;
bool reenable = false;
/* Wait until BEE is in idle state */
while (!(BEE_GetStatusFlags(base) & kBEE_IdleFlag))
{
}
/* Disable BEE before region configuration in case it is enabled. */
if ((base->CTRL >> BEE_CTRL_BEE_ENABLE_SHIFT) & 1)
{
BEE_Disable(base);
reenable = true;
}
if (region == kBEE_Region0)
{
/* Region 0 config */
iomuxc->GPR18 = config->regionBot;
iomuxc->GPR19 = config->regionTop;
base->CTRL |= BEE_CTRL_CTRL_AES_MODE_R0(config->mode);
base->ADDR_OFFSET0 = BEE_ADDR_OFFSET0_ADDR_OFFSET0(config->addrOffset);
}
else if (region == kBEE_Region1)
{
/* Region 1 config */
iomuxc->GPR20 = config->regionBot;
iomuxc->GPR21 = config->regionTop;
base->CTRL |= BEE_CTRL_CTRL_AES_MODE_R1(config->mode);
base->ADDR_OFFSET1 = BEE_ADDR_OFFSET1_ADDR_OFFSET0(config->addrOffset);
base->REGION1_BOT = BEE_REGION1_BOT_REGION1_BOT(config->regionBot);
base->REGION1_TOP = BEE_REGION1_TOP_REGION1_TOP(config->regionTop);
}
else
{
return kStatus_InvalidArgument;
}
/* Enable/disable region if desired */
if (config->regionEn == kBEE_RegionEnabled)
{
iomuxc->GPR11 |= IOMUXC_GPR_GPR11_BEE_DE_RX_EN(1 << region);
}
else
{
iomuxc->GPR11 &= ~IOMUXC_GPR_GPR11_BEE_DE_RX_EN(1 << region);
}
/* Reenable BEE if it was enabled before. */
if (reenable)
{
BEE_Enable(base);
}
return kStatus_Success;
}
status_t BEE_SetRegionKey(
BEE_Type *base, bee_region_t region, const uint8_t *key, size_t keySize, const uint8_t *nonce, size_t nonceSize)
{
bool reenable = false;
/* Key must be 32-bit aligned */
if (((uintptr_t)key & 0x3u) || (keySize != 16))
{
return kStatus_InvalidArgument;
}
/* Wait until BEE is in idle state */
while (!(BEE_GetStatusFlags(base) & kBEE_IdleFlag))
{
}
/* Disable BEE before region configuration in case it is enabled. */
if ((base->CTRL >> BEE_CTRL_BEE_ENABLE_SHIFT) & 1)
{
BEE_Disable(base);
reenable = true;
}
if (region == kBEE_Region0)
{
base->CTRL &= ~BEE_CTRL_KEY_REGION_SEL_MASK;
if (nonce)
{
if (nonceSize != 16)
{
return kStatus_InvalidArgument;
}
memcpy((uint32_t *)&base->CTR_NONCE0_W0, nonce, nonceSize);
}
}
else if (region == kBEE_Region1)
{
base->CTRL |= BEE_CTRL_KEY_REGION_SEL_MASK;
if (nonce)
{
if (nonceSize != 16)
{
return kStatus_InvalidArgument;
}
memcpy((uint32_t *)&base->CTR_NONCE1_W0, nonce, nonceSize);
}
}
else
{
return kStatus_InvalidArgument;
}
/* Try to load key. If BEE key selection fuse is programmed to use OTMP key on this device, this operation should
* fail. */
aligned_memcpy((uint32_t *)&base->AES_KEY0_W0, key, keySize);
if (memcmp((uint32_t *)&base->AES_KEY0_W0, key, keySize) != 0)
{
return kStatus_Fail;
}
/* Reenable BEE if it was enabled before. */
if (reenable)
{
BEE_Enable(base);
}
return kStatus_Success;
}
uint32_t BEE_GetStatusFlags(BEE_Type *base)
{
return base->STATUS;
}
void BEE_ClearStatusFlags(BEE_Type *base, uint32_t mask)
{
/* w1c */
base->STATUS |= mask;
}
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