245 lines
7.1 KiB
C
245 lines
7.1 KiB
C
/*
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* The Clear BSD License
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* Copyright 2017 NXP
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* All rights reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted (subject to the limitations in the disclaimer below) provided
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* that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fsl_bee.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/* Component ID definition, used by tools. */
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#ifndef FSL_COMPONENT_ID
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#define FSL_COMPONENT_ID "platform.drivers.bee"
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#endif
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/*******************************************************************************
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* Code
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******************************************************************************/
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static void aligned_memcpy(void *dst, const void *src, size_t size)
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{
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register uint32_t *to32 = (uint32_t *)(uintptr_t)dst;
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register const uint32_t *from32 = (const uint32_t *)(uintptr_t)src;
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while (size >= sizeof(uint32_t))
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{
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*to32 = *from32;
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size -= sizeof(uint32_t);
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to32++;
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from32++;
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}
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}
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void BEE_Init(BEE_Type *base)
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{
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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CLOCK_EnableClock(kCLOCK_Bee);
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#endif
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base->CTRL = BEE_CTRL_CTRL_SFTRST_N_MASK | BEE_CTRL_CTRL_CLK_EN_MASK;
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}
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void BEE_Deinit(BEE_Type *base)
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{
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base->CTRL &=
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~(BEE_CTRL_BEE_ENABLE_MASK | BEE_CTRL_CTRL_SFTRST_N_MASK | BEE_CTRL_CTRL_CLK_EN_MASK | BEE_CTRL_KEY_VALID_MASK);
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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CLOCK_DisableClock(kCLOCK_Bee);
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#endif
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}
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void BEE_GetDefaultConfig(bee_region_config_t *config)
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{
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assert(config);
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config->mode = kBEE_AesEcbMode;
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config->regionBot = 0U;
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config->regionTop = 0U;
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config->addrOffset = 0xF0000000U;
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config->regionEn = kBEE_RegionDisabled;
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}
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status_t BEE_SetRegionConfig(BEE_Type *base, bee_region_t region, const bee_region_config_t *config)
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{
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IOMUXC_GPR_Type *iomuxc = IOMUXC_GPR;
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bool reenable = false;
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/* Wait until BEE is in idle state */
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while (!(BEE_GetStatusFlags(base) & kBEE_IdleFlag))
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{
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}
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/* Disable BEE before region configuration in case it is enabled. */
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if ((base->CTRL >> BEE_CTRL_BEE_ENABLE_SHIFT) & 1)
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{
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BEE_Disable(base);
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reenable = true;
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}
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if (region == kBEE_Region0)
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{
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/* Region 0 config */
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iomuxc->GPR18 = config->regionBot;
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iomuxc->GPR19 = config->regionTop;
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base->CTRL |= BEE_CTRL_CTRL_AES_MODE_R0(config->mode);
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base->ADDR_OFFSET0 = BEE_ADDR_OFFSET0_ADDR_OFFSET0(config->addrOffset);
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}
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else if (region == kBEE_Region1)
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{
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/* Region 1 config */
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iomuxc->GPR20 = config->regionBot;
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iomuxc->GPR21 = config->regionTop;
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base->CTRL |= BEE_CTRL_CTRL_AES_MODE_R1(config->mode);
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base->ADDR_OFFSET1 = BEE_ADDR_OFFSET1_ADDR_OFFSET0(config->addrOffset);
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base->REGION1_BOT = BEE_REGION1_BOT_REGION1_BOT(config->regionBot);
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base->REGION1_TOP = BEE_REGION1_TOP_REGION1_TOP(config->regionTop);
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}
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else
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{
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return kStatus_InvalidArgument;
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}
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/* Enable/disable region if desired */
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if (config->regionEn == kBEE_RegionEnabled)
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{
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iomuxc->GPR11 |= IOMUXC_GPR_GPR11_BEE_DE_RX_EN(1 << region);
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}
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else
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{
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iomuxc->GPR11 &= ~IOMUXC_GPR_GPR11_BEE_DE_RX_EN(1 << region);
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}
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/* Reenable BEE if it was enabled before. */
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if (reenable)
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{
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BEE_Enable(base);
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}
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return kStatus_Success;
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}
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status_t BEE_SetRegionKey(
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BEE_Type *base, bee_region_t region, const uint8_t *key, size_t keySize, const uint8_t *nonce, size_t nonceSize)
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{
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bool reenable = false;
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/* Key must be 32-bit aligned */
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if (((uintptr_t)key & 0x3u) || (keySize != 16))
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{
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return kStatus_InvalidArgument;
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}
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/* Wait until BEE is in idle state */
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while (!(BEE_GetStatusFlags(base) & kBEE_IdleFlag))
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{
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}
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/* Disable BEE before region configuration in case it is enabled. */
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if ((base->CTRL >> BEE_CTRL_BEE_ENABLE_SHIFT) & 1)
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{
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BEE_Disable(base);
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reenable = true;
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}
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if (region == kBEE_Region0)
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{
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base->CTRL &= ~BEE_CTRL_KEY_REGION_SEL_MASK;
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if (nonce)
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{
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if (nonceSize != 16)
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{
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return kStatus_InvalidArgument;
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}
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memcpy((uint32_t *)&base->CTR_NONCE0_W0, nonce, nonceSize);
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}
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}
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else if (region == kBEE_Region1)
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{
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base->CTRL |= BEE_CTRL_KEY_REGION_SEL_MASK;
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if (nonce)
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{
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if (nonceSize != 16)
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{
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return kStatus_InvalidArgument;
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}
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memcpy((uint32_t *)&base->CTR_NONCE1_W0, nonce, nonceSize);
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}
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}
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else
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{
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return kStatus_InvalidArgument;
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}
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/* Try to load key. If BEE key selection fuse is programmed to use OTMP key on this device, this operation should
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* fail. */
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aligned_memcpy((uint32_t *)&base->AES_KEY0_W0, key, keySize);
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if (memcmp((uint32_t *)&base->AES_KEY0_W0, key, keySize) != 0)
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{
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return kStatus_Fail;
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}
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/* Reenable BEE if it was enabled before. */
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if (reenable)
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{
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BEE_Enable(base);
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}
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return kStatus_Success;
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}
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uint32_t BEE_GetStatusFlags(BEE_Type *base)
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{
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return base->STATUS;
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}
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void BEE_ClearStatusFlags(BEE_Type *base, uint32_t mask)
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{
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/* w1c */
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base->STATUS |= mask;
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}
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