2022-08-14 10:29:05 +08:00
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/*
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2022-08-17 00:43:24 +08:00
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* Copyright (c) 2006-2022, Synwit Technology Co.,Ltd.
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2022-08-14 10:29:05 +08:00
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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2022-08-17 00:43:24 +08:00
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* 2020-07-10 lik first version
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2022-08-14 10:29:05 +08:00
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*/
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#include "drv_crypto.h"
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#include <string.h>
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#ifdef RT_USING_HWCRYPTO
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//#define DRV_DEBUG
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#define LOG_TAG "drv.crypto"
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#include <drv_log.h>
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struct swm_hwcrypto_device
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{
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struct rt_hwcrypto_device dev;
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struct rt_mutex mutex;
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};
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static struct swm_hwcrypto_device hwcrypto_obj;
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#ifdef BSP_USING_CRC
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2022-08-17 00:43:24 +08:00
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#define DEFAULT_CRC (CRC)
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#define DEFAULT_INIVAL (0x00000000)
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#define DEFAULT_INBITS (2)
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#define DEFAULT_CRC1632 (0)
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#define DEFAULT_OUT_NOT (0)
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#define DEFAULT_OUT_REV (0)
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2022-08-14 10:29:05 +08:00
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struct swm_crc_cfg
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{
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CRC_TypeDef *CRCx;
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2022-08-17 00:43:24 +08:00
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uint32_t inival;
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uint8_t crc_inbits;
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uint8_t crc_1632;
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uint8_t crc_out_not;
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uint8_t crc_out_rev;
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2022-08-14 10:29:05 +08:00
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};
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static struct hwcrypto_crc_cfg swm_crc_cfg;
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static rt_uint32_t swm_crc_update(struct hwcrypto_crc *ctx, const rt_uint8_t *in, rt_size_t length)
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{
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rt_uint32_t result = 0;
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struct swm_hwcrypto_device *hwcrypto_dev = (struct swm_hwcrypto_device *)ctx->parent.device->user_data;
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struct swm_crc_cfg *crc_cfg = (struct swm_crc_cfg *)(ctx->parent.contex);
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rt_mutex_take(&hwcrypto_dev->mutex, RT_WAITING_FOREVER);
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if (memcmp(&swm_crc_cfg, &ctx->crc_cfg, sizeof(struct hwcrypto_crc_cfg)) != 0)
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{
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crc_cfg->CRCx = CRC;
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2022-08-17 00:43:24 +08:00
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crc_cfg->inival = ctx->crc_cfg.last_val;
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2022-08-14 10:29:05 +08:00
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switch (ctx->crc_cfg.poly)
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{
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case 0x1021:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_1632 = 1;
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2022-08-14 10:29:05 +08:00
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break;
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case 0x04C11DB7:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_1632 = 0;
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2022-08-14 10:29:05 +08:00
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break;
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default:
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goto _exit;
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}
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switch (ctx->crc_cfg.width)
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{
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case 8:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_inbits = 2;
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2022-08-14 10:29:05 +08:00
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break;
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case 16:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_inbits = 1;
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2022-08-14 10:29:05 +08:00
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break;
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case 32:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_inbits = 0;
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2022-08-14 10:29:05 +08:00
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break;
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default:
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goto _exit;
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}
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_out_not = 0;
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2022-08-14 10:29:05 +08:00
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switch (ctx->crc_cfg.flags)
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{
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case 0:
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case CRC_FLAG_REFIN:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_out_rev = 0;
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2022-08-14 10:29:05 +08:00
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break;
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case CRC_FLAG_REFOUT:
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case CRC_FLAG_REFIN | CRC_FLAG_REFOUT:
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2022-08-17 00:43:24 +08:00
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crc_cfg->crc_out_rev = 1;
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2022-08-14 10:29:05 +08:00
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break;
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default:
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goto _exit;
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}
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2022-08-17 00:43:24 +08:00
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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);
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2022-08-14 10:29:05 +08:00
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memcpy(&swm_crc_cfg, &ctx->crc_cfg, sizeof(struct hwcrypto_crc_cfg));
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}
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for (uint32_t i = 0; i < length; i++)
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CRC_Write((uint32_t)in[i]);
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result = CRC_Result();
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ctx->crc_cfg.last_val = result;
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swm_crc_cfg.last_val = ctx->crc_cfg.last_val;
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result = (result ? result ^ (ctx->crc_cfg.xorout) : result);
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_exit:
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rt_mutex_release(&hwcrypto_dev->mutex);
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return result;
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}
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static const struct hwcrypto_crc_ops swm_crc_ops =
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{
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.update = swm_crc_update,
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};
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#endif /* BSP_USING_CRC */
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static rt_err_t swm_crypto_create(struct rt_hwcrypto_ctx *ctx)
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{
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rt_err_t res = RT_EOK;
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switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
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{
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#if defined(BSP_USING_CRC)
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case HWCRYPTO_TYPE_CRC:
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{
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struct swm_crc_cfg *crc_cfg = rt_calloc(1, sizeof(struct swm_crc_cfg));
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if (RT_NULL == crc_cfg)
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{
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res = -RT_ERROR;
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break;
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}
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2022-08-17 00:43:24 +08:00
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crc_cfg->CRCx = DEFAULT_CRC;
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crc_cfg->inival = DEFAULT_INIVAL;
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crc_cfg->crc_inbits = DEFAULT_INBITS;
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crc_cfg->crc_1632 = DEFAULT_CRC1632;
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crc_cfg->crc_out_not = DEFAULT_OUT_NOT;
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crc_cfg->crc_out_rev = DEFAULT_OUT_REV;
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2022-08-14 10:29:05 +08:00
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ctx->contex = crc_cfg;
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((struct hwcrypto_crc *)ctx)->ops = &swm_crc_ops;
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break;
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}
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#endif /* BSP_USING_CRC */
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default:
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res = -RT_ERROR;
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break;
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}
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return res;
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}
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static void swm_crypto_destroy(struct rt_hwcrypto_ctx *ctx)
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{
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struct swm_crc_cfg *crc_cfg = (struct swm_crc_cfg *)(ctx->contex);
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switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
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{
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#if defined(BSP_USING_CRC)
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case HWCRYPTO_TYPE_CRC:
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crc_cfg->CRCx->CR &= ~CRC_CR_EN_Msk;
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break;
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#endif /* BSP_USING_CRC */
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default:
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break;
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}
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rt_free(ctx->contex);
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}
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static rt_err_t swm_crypto_clone(struct rt_hwcrypto_ctx *des, const struct rt_hwcrypto_ctx *src)
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{
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rt_err_t res = RT_EOK;
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switch (src->type & HWCRYPTO_MAIN_TYPE_MASK)
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{
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#if defined(BSP_USING_CRC)
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case HWCRYPTO_TYPE_CRC:
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if (des->contex && src->contex)
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{
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rt_memcpy(des->contex, src->contex, sizeof(struct swm_crc_cfg));
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}
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break;
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#endif /* BSP_USING_CRC */
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default:
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res = -RT_ERROR;
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break;
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}
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return res;
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}
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static void swm_crypto_reset(struct rt_hwcrypto_ctx *ctx)
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{
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struct swm_crc_cfg *crc_cfg = (struct swm_crc_cfg *)(ctx->contex);
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switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
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{
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#if defined(BSP_USING_CRC)
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case HWCRYPTO_TYPE_CRC:
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crc_cfg->CRCx->CR &= ~CRC_CR_EN_Msk;
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break;
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#endif /* BSP_USING_CRC */
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default:
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break;
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}
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}
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static const struct rt_hwcrypto_ops swm_hwcrypto_ops =
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{
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.create = swm_crypto_create,
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.destroy = swm_crypto_destroy,
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.copy = swm_crypto_clone,
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.reset = swm_crypto_reset,
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};
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int swm_crypto_init(void)
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{
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rt_uint32_t cpuid[2] = {0};
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hwcrypto_obj.dev.ops = &swm_hwcrypto_ops;
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cpuid[0] = SCB->CPUID;
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hwcrypto_obj.dev.id = 0;
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rt_memcpy(&hwcrypto_obj.dev.id, cpuid, 8);
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hwcrypto_obj.dev.user_data = &hwcrypto_obj;
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if (rt_hwcrypto_register(&hwcrypto_obj.dev, RT_HWCRYPTO_DEFAULT_NAME) != RT_EOK)
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{
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return -1;
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}
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2022-08-17 00:43:24 +08:00
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rt_mutex_init(&hwcrypto_obj.mutex, RT_HWCRYPTO_DEFAULT_NAME, RT_IPC_FLAG_PRIO);
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2022-08-14 10:29:05 +08:00
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return 0;
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}
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INIT_BOARD_EXPORT(swm_crypto_init);
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2022-08-17 00:43:24 +08:00
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2022-08-14 10:29:05 +08:00
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#endif /* RT_USING_HWCRYPTO */
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