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/*
* Copyright (c) 2006-2022, Synwit Technology Co.,Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-07-10 lik first version
*/
#include "drv_crypto.h"
#include <string.h>
#ifdef RT_USING_HWCRYPTO
//#define DRV_DEBUG
#define LOG_TAG "drv.crypto"
#include <drv_log.h>
struct swm_hwcrypto_device
{
struct rt_hwcrypto_device dev;
struct rt_mutex mutex;
};
static struct swm_hwcrypto_device hwcrypto_obj;
#ifdef BSP_USING_CRC
#define DEFAULT_CRC (CRC)
#define DEFAULT_INIVAL (0x00000000)
#define DEFAULT_INBITS (2)
#define DEFAULT_CRC1632 (0)
#define DEFAULT_OUT_NOT (0)
#define DEFAULT_OUT_REV (0)
struct swm_crc_cfg
{
CRC_TypeDef *CRCx;
uint32_t inival;
uint8_t crc_inbits;
uint8_t crc_1632;
uint8_t crc_out_not;
uint8_t crc_out_rev;
};
static struct hwcrypto_crc_cfg swm_crc_cfg;
static rt_uint32_t swm_crc_update(struct hwcrypto_crc *ctx, const rt_uint8_t *in, rt_size_t length)
{
rt_uint32_t result = 0;
struct swm_hwcrypto_device *hwcrypto_dev = (struct swm_hwcrypto_device *)ctx->parent.device->user_data;
struct swm_crc_cfg *crc_cfg = (struct swm_crc_cfg *)(ctx->parent.contex);
rt_mutex_take(&hwcrypto_dev->mutex, RT_WAITING_FOREVER);
if (memcmp(&swm_crc_cfg, &ctx->crc_cfg, sizeof(struct hwcrypto_crc_cfg)) != 0)
{
crc_cfg->CRCx = CRC;
crc_cfg->inival = ctx->crc_cfg.last_val;
switch (ctx->crc_cfg.poly)
{
case 0x1021:
crc_cfg->crc_1632 = 1;
break;
case 0x04C11DB7:
crc_cfg->crc_1632 = 0;
break;
default:
goto _exit;
}
switch (ctx->crc_cfg.width)
{
case 8:
crc_cfg->crc_inbits = 2;
break;
case 16:
crc_cfg->crc_inbits = 1;
break;
case 32:
crc_cfg->crc_inbits = 0;
break;
default:
goto _exit;
}
crc_cfg->crc_out_not = 0;
switch (ctx->crc_cfg.flags)
{
case 0:
case CRC_FLAG_REFIN:
crc_cfg->crc_out_rev = 0;
break;
case CRC_FLAG_REFOUT:
case CRC_FLAG_REFIN | CRC_FLAG_REFOUT:
crc_cfg->crc_out_rev = 1;
break;
default:
goto _exit;
}
CRC_Init(crc_cfg->CRCx, (crc_cfg->crc_inbits << 1) | crc_cfg->crc_1632, crc_cfg->crc_out_not, crc_cfg->crc_out_rev, crc_cfg->inival);
memcpy(&swm_crc_cfg, &ctx->crc_cfg, sizeof(struct hwcrypto_crc_cfg));
}
for (uint32_t i = 0; i < length; i++)
CRC_Write((uint32_t)in[i]);
result = CRC_Result();
ctx->crc_cfg.last_val = result;
swm_crc_cfg.last_val = ctx->crc_cfg.last_val;
result = (result ? result ^ (ctx->crc_cfg.xorout) : result);
_exit:
rt_mutex_release(&hwcrypto_dev->mutex);
return result;
}
static const struct hwcrypto_crc_ops swm_crc_ops =
{
.update = swm_crc_update,
};
#endif /* BSP_USING_CRC */
static rt_err_t swm_crypto_create(struct rt_hwcrypto_ctx *ctx)
{
rt_err_t res = RT_EOK;
switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
{
struct swm_crc_cfg *crc_cfg = rt_calloc(1, sizeof(struct swm_crc_cfg));
if (RT_NULL == crc_cfg)
{
res = -RT_ERROR;
break;
}
crc_cfg->CRCx = DEFAULT_CRC;
crc_cfg->inival = DEFAULT_INIVAL;
crc_cfg->crc_inbits = DEFAULT_INBITS;
crc_cfg->crc_1632 = DEFAULT_CRC1632;
crc_cfg->crc_out_not = DEFAULT_OUT_NOT;
crc_cfg->crc_out_rev = DEFAULT_OUT_REV;
ctx->contex = crc_cfg;
((struct hwcrypto_crc *)ctx)->ops = &swm_crc_ops;
break;
}
#endif /* BSP_USING_CRC */
default:
res = -RT_ERROR;
break;
}
return res;
}
static void swm_crypto_destroy(struct rt_hwcrypto_ctx *ctx)
{
struct swm_crc_cfg *crc_cfg = (struct swm_crc_cfg *)(ctx->contex);
switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
crc_cfg->CRCx->CR &= ~CRC_CR_EN_Msk;
break;
#endif /* BSP_USING_CRC */
default:
break;
}
rt_free(ctx->contex);
}
static rt_err_t swm_crypto_clone(struct rt_hwcrypto_ctx *des, const struct rt_hwcrypto_ctx *src)
{
rt_err_t res = RT_EOK;
switch (src->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
if (des->contex && src->contex)
{
rt_memcpy(des->contex, src->contex, sizeof(struct swm_crc_cfg));
}
break;
#endif /* BSP_USING_CRC */
default:
res = -RT_ERROR;
break;
}
return res;
}
static void swm_crypto_reset(struct rt_hwcrypto_ctx *ctx)
{
struct swm_crc_cfg *crc_cfg = (struct swm_crc_cfg *)(ctx->contex);
switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
crc_cfg->CRCx->CR &= ~CRC_CR_EN_Msk;
break;
#endif /* BSP_USING_CRC */
default:
break;
}
}
static const struct rt_hwcrypto_ops swm_hwcrypto_ops =
{
.create = swm_crypto_create,
.destroy = swm_crypto_destroy,
.copy = swm_crypto_clone,
.reset = swm_crypto_reset,
};
int swm_crypto_init(void)
{
rt_uint32_t cpuid[2] = {0};
hwcrypto_obj.dev.ops = &swm_hwcrypto_ops;
cpuid[0] = SCB->CPUID;
hwcrypto_obj.dev.id = 0;
rt_memcpy(&hwcrypto_obj.dev.id, cpuid, 8);
hwcrypto_obj.dev.user_data = &hwcrypto_obj;
if (rt_hwcrypto_register(&hwcrypto_obj.dev, RT_HWCRYPTO_DEFAULT_NAME) != RT_EOK)
{
return -1;
}
rt_mutex_init(&hwcrypto_obj.mutex, RT_HWCRYPTO_DEFAULT_NAME, RT_IPC_FLAG_PRIO);
return 0;
}
INIT_BOARD_EXPORT(swm_crypto_init);
#endif /* RT_USING_HWCRYPTO */
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