linux-imx

/*

 * Crypto acceleration support for Rockchip RK3288

 *

 * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd

 *

 * Author: Zain Wang <zain.wang@rock-chips.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * Some ideas are from marvell-cesa.c and s5p-sss.c driver.

 */

#include "rk3288_crypto.h"

​

#define RK_CRYPTO_DEC           BIT(0)

​

static void rk_crypto_complete(struct crypto_async_request *base, int err)

{

    if (base->complete)

        base->complete(base, err);

}

​

static int rk_handle_req(struct rk_crypto_info *dev,

             struct ablkcipher_request *req)

{

    if (!IS_ALIGNED(req->nbytes, dev->align_size))

        return -EINVAL;

    else

        return dev->enqueue(dev, &req->base);

}

​

static int rk_aes_setkey(struct crypto_ablkcipher *cipher,

             const u8 *key, unsigned int keylen)

{

    struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);

    struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm);

​

    if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&

        keylen != AES_KEYSIZE_256) {

        crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);

        return -EINVAL;

    }

    ctx->keylen = keylen;

    memcpy_toio(ctx->dev->reg + RK_CRYPTO_AES_KEY_0, key, keylen);

    return 0;

}

​

static int rk_tdes_setkey(struct crypto_ablkcipher *cipher,

              const u8 *key, unsigned int keylen)

{

    struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);

    struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm);

    u32 tmp[DES_EXPKEY_WORDS];

​

    if (keylen != DES_KEY_SIZE && keylen != DES3_EDE_KEY_SIZE) {

        crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);

        return -EINVAL;

    }

​

    if (keylen == DES_KEY_SIZE) {

        if (!des_ekey(tmp, key) &&

            (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) {