| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * sun4i-ss.h - hardware cryptographic accelerator for Allwinner A20 SoC |
| * |
| * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com> |
| * |
| * Support AES cipher with 128,192,256 bits keysize. |
| * Support MD5 and SHA1 hash algorithms. |
| * Support DES and 3DES |
| * |
| * You could find the datasheet in Documentation/arm/sunxi.rst |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/crypto.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/reset.h> |
| #include <crypto/scatterwalk.h> |
| #include <linux/scatterlist.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/pm_runtime.h> |
| #include <crypto/md5.h> |
| #include <crypto/skcipher.h> |
| #include <crypto/sha.h> |
| #include <crypto/hash.h> |
| #include <crypto/internal/hash.h> |
| #include <crypto/internal/skcipher.h> |
| #include <crypto/aes.h> |
| #include <crypto/internal/des.h> |
| #include <crypto/internal/rng.h> |
| #include <crypto/rng.h> |
| |
| #define SS_CTL 0x00 |
| #define SS_KEY0 0x04 |
| #define SS_KEY1 0x08 |
| #define SS_KEY2 0x0C |
| #define SS_KEY3 0x10 |
| #define SS_KEY4 0x14 |
| #define SS_KEY5 0x18 |
| #define SS_KEY6 0x1C |
| #define SS_KEY7 0x20 |
| |
| #define SS_IV0 0x24 |
| #define SS_IV1 0x28 |
| #define SS_IV2 0x2C |
| #define SS_IV3 0x30 |
| |
| #define SS_FCSR 0x44 |
| |
| #define SS_MD0 0x4C |
| #define SS_MD1 0x50 |
| #define SS_MD2 0x54 |
| #define SS_MD3 0x58 |
| #define SS_MD4 0x5C |
| |
| #define SS_RXFIFO 0x200 |
| #define SS_TXFIFO 0x204 |
| |
| /* SS_CTL configuration values */ |
| |
| /* PRNG generator mode - bit 15 */ |
| #define SS_PRNG_ONESHOT (0 << 15) |
| #define SS_PRNG_CONTINUE (1 << 15) |
| |
| /* IV mode for hash */ |
| #define SS_IV_ARBITRARY (1 << 14) |
| |
| /* SS operation mode - bits 12-13 */ |
| #define SS_ECB (0 << 12) |
| #define SS_CBC (1 << 12) |
| #define SS_CTS (3 << 12) |
| |
| /* Counter width for CNT mode - bits 10-11 */ |
| #define SS_CNT_16BITS (0 << 10) |
| #define SS_CNT_32BITS (1 << 10) |
| #define SS_CNT_64BITS (2 << 10) |
| |
| /* Key size for AES - bits 8-9 */ |
| #define SS_AES_128BITS (0 << 8) |
| #define SS_AES_192BITS (1 << 8) |
| #define SS_AES_256BITS (2 << 8) |
| |
| /* Operation direction - bit 7 */ |
| #define SS_ENCRYPTION (0 << 7) |
| #define SS_DECRYPTION (1 << 7) |
| |
| /* SS Method - bits 4-6 */ |
| #define SS_OP_AES (0 << 4) |
| #define SS_OP_DES (1 << 4) |
| #define SS_OP_3DES (2 << 4) |
| #define SS_OP_SHA1 (3 << 4) |
| #define SS_OP_MD5 (4 << 4) |
| #define SS_OP_PRNG (5 << 4) |
| |
| /* Data end bit - bit 2 */ |
| #define SS_DATA_END (1 << 2) |
| |
| /* PRNG start bit - bit 1 */ |
| #define SS_PRNG_START (1 << 1) |
| |
| /* SS Enable bit - bit 0 */ |
| #define SS_DISABLED (0 << 0) |
| #define SS_ENABLED (1 << 0) |
| |
| /* SS_FCSR configuration values */ |
| /* RX FIFO status - bit 30 */ |
| #define SS_RXFIFO_FREE (1 << 30) |
| |
| /* RX FIFO empty spaces - bits 24-29 */ |
| #define SS_RXFIFO_SPACES(val) (((val) >> 24) & 0x3f) |
| |
| /* TX FIFO status - bit 22 */ |
| #define SS_TXFIFO_AVAILABLE (1 << 22) |
| |
| /* TX FIFO available spaces - bits 16-21 */ |
| #define SS_TXFIFO_SPACES(val) (((val) >> 16) & 0x3f) |
| |
| #define SS_RX_MAX 32 |
| #define SS_RX_DEFAULT SS_RX_MAX |
| #define SS_TX_MAX 33 |
| |
| #define SS_RXFIFO_EMP_INT_PENDING (1 << 10) |
| #define SS_TXFIFO_AVA_INT_PENDING (1 << 8) |
| #define SS_RXFIFO_EMP_INT_ENABLE (1 << 2) |
| #define SS_TXFIFO_AVA_INT_ENABLE (1 << 0) |
| |
| #define SS_SEED_LEN 192 |
| #define SS_DATA_LEN 160 |
| |
| struct sun4i_ss_ctx { |
| void __iomem *base; |
| int irq; |
| struct clk *busclk; |
| struct clk *ssclk; |
| struct reset_control *reset; |
| struct device *dev; |
| struct resource *res; |
| spinlock_t slock; /* control the use of the device */ |
| #ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG |
| u32 seed[SS_SEED_LEN / BITS_PER_LONG]; |
| #endif |
| }; |
| |
| struct sun4i_ss_alg_template { |
| u32 type; |
| u32 mode; |
| union { |
| struct skcipher_alg crypto; |
| struct ahash_alg hash; |
| struct rng_alg rng; |
| } alg; |
| struct sun4i_ss_ctx *ss; |
| }; |
| |
| struct sun4i_tfm_ctx { |
| u32 key[AES_MAX_KEY_SIZE / 4];/* divided by sizeof(u32) */ |
| u32 keylen; |
| u32 keymode; |
| struct sun4i_ss_ctx *ss; |
| struct crypto_sync_skcipher *fallback_tfm; |
| }; |
| |
| struct sun4i_cipher_req_ctx { |
| u32 mode; |
| }; |
| |
| struct sun4i_req_ctx { |
| u32 mode; |
| u64 byte_count; /* number of bytes "uploaded" to the device */ |
| u32 hash[5]; /* for storing SS_IVx register */ |
| char buf[64]; |
| unsigned int len; |
| int flags; |
| }; |
| |
| int sun4i_hash_crainit(struct crypto_tfm *tfm); |
| void sun4i_hash_craexit(struct crypto_tfm *tfm); |
| int sun4i_hash_init(struct ahash_request *areq); |
| int sun4i_hash_update(struct ahash_request *areq); |
| int sun4i_hash_final(struct ahash_request *areq); |
| int sun4i_hash_finup(struct ahash_request *areq); |
| int sun4i_hash_digest(struct ahash_request *areq); |
| int sun4i_hash_export_md5(struct ahash_request *areq, void *out); |
| int sun4i_hash_import_md5(struct ahash_request *areq, const void *in); |
| int sun4i_hash_export_sha1(struct ahash_request *areq, void *out); |
| int sun4i_hash_import_sha1(struct ahash_request *areq, const void *in); |
| |
| int sun4i_ss_cbc_aes_encrypt(struct skcipher_request *areq); |
| int sun4i_ss_cbc_aes_decrypt(struct skcipher_request *areq); |
| int sun4i_ss_ecb_aes_encrypt(struct skcipher_request *areq); |
| int sun4i_ss_ecb_aes_decrypt(struct skcipher_request *areq); |
| |
| int sun4i_ss_cbc_des_encrypt(struct skcipher_request *areq); |
| int sun4i_ss_cbc_des_decrypt(struct skcipher_request *areq); |
| int sun4i_ss_ecb_des_encrypt(struct skcipher_request *areq); |
| int sun4i_ss_ecb_des_decrypt(struct skcipher_request *areq); |
| |
| int sun4i_ss_cbc_des3_encrypt(struct skcipher_request *areq); |
| int sun4i_ss_cbc_des3_decrypt(struct skcipher_request *areq); |
| int sun4i_ss_ecb_des3_encrypt(struct skcipher_request *areq); |
| int sun4i_ss_ecb_des3_decrypt(struct skcipher_request *areq); |
| |
| int sun4i_ss_cipher_init(struct crypto_tfm *tfm); |
| void sun4i_ss_cipher_exit(struct crypto_tfm *tfm); |
| int sun4i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, |
| unsigned int keylen); |
| int sun4i_ss_des_setkey(struct crypto_skcipher *tfm, const u8 *key, |
| unsigned int keylen); |
| int sun4i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, |
| unsigned int keylen); |
| int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, |
| unsigned int slen, u8 *dst, unsigned int dlen); |
| int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); |