1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * sun4i-ss.h - hardware cryptographic accelerator for Allwinner A20 SoC 4 * 5 * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com> 6 * 7 * Support AES cipher with 128,192,256 bits keysize. 8 * Support MD5 and SHA1 hash algorithms. 9 * Support DES and 3DES 10 * 11 * You could find the datasheet in Documentation/arm/sunxi.rst 12 */ 13 14 #include <linux/clk.h> 15 #include <linux/crypto.h> 16 #include <linux/io.h> 17 #include <linux/module.h> 18 #include <linux/of.h> 19 #include <linux/platform_device.h> 20 #include <linux/reset.h> 21 #include <crypto/scatterwalk.h> 22 #include <linux/scatterlist.h> 23 #include <linux/interrupt.h> 24 #include <linux/delay.h> 25 #include <crypto/md5.h> 26 #include <crypto/skcipher.h> 27 #include <crypto/sha.h> 28 #include <crypto/hash.h> 29 #include <crypto/internal/hash.h> 30 #include <crypto/internal/skcipher.h> 31 #include <crypto/aes.h> 32 #include <crypto/internal/des.h> 33 #include <crypto/internal/rng.h> 34 #include <crypto/rng.h> 35 36 #define SS_CTL 0x00 37 #define SS_KEY0 0x04 38 #define SS_KEY1 0x08 39 #define SS_KEY2 0x0C 40 #define SS_KEY3 0x10 41 #define SS_KEY4 0x14 42 #define SS_KEY5 0x18 43 #define SS_KEY6 0x1C 44 #define SS_KEY7 0x20 45 46 #define SS_IV0 0x24 47 #define SS_IV1 0x28 48 #define SS_IV2 0x2C 49 #define SS_IV3 0x30 50 51 #define SS_FCSR 0x44 52 53 #define SS_MD0 0x4C 54 #define SS_MD1 0x50 55 #define SS_MD2 0x54 56 #define SS_MD3 0x58 57 #define SS_MD4 0x5C 58 59 #define SS_RXFIFO 0x200 60 #define SS_TXFIFO 0x204 61 62 /* SS_CTL configuration values */ 63 64 /* PRNG generator mode - bit 15 */ 65 #define SS_PRNG_ONESHOT (0 << 15) 66 #define SS_PRNG_CONTINUE (1 << 15) 67 68 /* IV mode for hash */ 69 #define SS_IV_ARBITRARY (1 << 14) 70 71 /* SS operation mode - bits 12-13 */ 72 #define SS_ECB (0 << 12) 73 #define SS_CBC (1 << 12) 74 #define SS_CTS (3 << 12) 75 76 /* Counter width for CNT mode - bits 10-11 */ 77 #define SS_CNT_16BITS (0 << 10) 78 #define SS_CNT_32BITS (1 << 10) 79 #define SS_CNT_64BITS (2 << 10) 80 81 /* Key size for AES - bits 8-9 */ 82 #define SS_AES_128BITS (0 << 8) 83 #define SS_AES_192BITS (1 << 8) 84 #define SS_AES_256BITS (2 << 8) 85 86 /* Operation direction - bit 7 */ 87 #define SS_ENCRYPTION (0 << 7) 88 #define SS_DECRYPTION (1 << 7) 89 90 /* SS Method - bits 4-6 */ 91 #define SS_OP_AES (0 << 4) 92 #define SS_OP_DES (1 << 4) 93 #define SS_OP_3DES (2 << 4) 94 #define SS_OP_SHA1 (3 << 4) 95 #define SS_OP_MD5 (4 << 4) 96 #define SS_OP_PRNG (5 << 4) 97 98 /* Data end bit - bit 2 */ 99 #define SS_DATA_END (1 << 2) 100 101 /* PRNG start bit - bit 1 */ 102 #define SS_PRNG_START (1 << 1) 103 104 /* SS Enable bit - bit 0 */ 105 #define SS_DISABLED (0 << 0) 106 #define SS_ENABLED (1 << 0) 107 108 /* SS_FCSR configuration values */ 109 /* RX FIFO status - bit 30 */ 110 #define SS_RXFIFO_FREE (1 << 30) 111 112 /* RX FIFO empty spaces - bits 24-29 */ 113 #define SS_RXFIFO_SPACES(val) (((val) >> 24) & 0x3f) 114 115 /* TX FIFO status - bit 22 */ 116 #define SS_TXFIFO_AVAILABLE (1 << 22) 117 118 /* TX FIFO available spaces - bits 16-21 */ 119 #define SS_TXFIFO_SPACES(val) (((val) >> 16) & 0x3f) 120 121 #define SS_RX_MAX 32 122 #define SS_RX_DEFAULT SS_RX_MAX 123 #define SS_TX_MAX 33 124 125 #define SS_RXFIFO_EMP_INT_PENDING (1 << 10) 126 #define SS_TXFIFO_AVA_INT_PENDING (1 << 8) 127 #define SS_RXFIFO_EMP_INT_ENABLE (1 << 2) 128 #define SS_TXFIFO_AVA_INT_ENABLE (1 << 0) 129 130 #define SS_SEED_LEN 192 131 #define SS_DATA_LEN 160 132 133 struct sun4i_ss_ctx { 134 void __iomem *base; 135 int irq; 136 struct clk *busclk; 137 struct clk *ssclk; 138 struct reset_control *reset; 139 struct device *dev; 140 struct resource *res; 141 spinlock_t slock; /* control the use of the device */ 142 #ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG 143 u32 seed[SS_SEED_LEN / BITS_PER_LONG]; 144 #endif 145 }; 146 147 struct sun4i_ss_alg_template { 148 u32 type; 149 u32 mode; 150 union { 151 struct skcipher_alg crypto; 152 struct ahash_alg hash; 153 struct rng_alg rng; 154 } alg; 155 struct sun4i_ss_ctx *ss; 156 }; 157 158 struct sun4i_tfm_ctx { 159 u32 key[AES_MAX_KEY_SIZE / 4];/* divided by sizeof(u32) */ 160 u32 keylen; 161 u32 keymode; 162 struct sun4i_ss_ctx *ss; 163 struct crypto_sync_skcipher *fallback_tfm; 164 }; 165 166 struct sun4i_cipher_req_ctx { 167 u32 mode; 168 }; 169 170 struct sun4i_req_ctx { 171 u32 mode; 172 u64 byte_count; /* number of bytes "uploaded" to the device */ 173 u32 hash[5]; /* for storing SS_IVx register */ 174 char buf[64]; 175 unsigned int len; 176 int flags; 177 }; 178 179 int sun4i_hash_crainit(struct crypto_tfm *tfm); 180 int sun4i_hash_init(struct ahash_request *areq); 181 int sun4i_hash_update(struct ahash_request *areq); 182 int sun4i_hash_final(struct ahash_request *areq); 183 int sun4i_hash_finup(struct ahash_request *areq); 184 int sun4i_hash_digest(struct ahash_request *areq); 185 int sun4i_hash_export_md5(struct ahash_request *areq, void *out); 186 int sun4i_hash_import_md5(struct ahash_request *areq, const void *in); 187 int sun4i_hash_export_sha1(struct ahash_request *areq, void *out); 188 int sun4i_hash_import_sha1(struct ahash_request *areq, const void *in); 189 190 int sun4i_ss_cbc_aes_encrypt(struct skcipher_request *areq); 191 int sun4i_ss_cbc_aes_decrypt(struct skcipher_request *areq); 192 int sun4i_ss_ecb_aes_encrypt(struct skcipher_request *areq); 193 int sun4i_ss_ecb_aes_decrypt(struct skcipher_request *areq); 194 195 int sun4i_ss_cbc_des_encrypt(struct skcipher_request *areq); 196 int sun4i_ss_cbc_des_decrypt(struct skcipher_request *areq); 197 int sun4i_ss_ecb_des_encrypt(struct skcipher_request *areq); 198 int sun4i_ss_ecb_des_decrypt(struct skcipher_request *areq); 199 200 int sun4i_ss_cbc_des3_encrypt(struct skcipher_request *areq); 201 int sun4i_ss_cbc_des3_decrypt(struct skcipher_request *areq); 202 int sun4i_ss_ecb_des3_encrypt(struct skcipher_request *areq); 203 int sun4i_ss_ecb_des3_decrypt(struct skcipher_request *areq); 204 205 int sun4i_ss_cipher_init(struct crypto_tfm *tfm); 206 void sun4i_ss_cipher_exit(struct crypto_tfm *tfm); 207 int sun4i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, 208 unsigned int keylen); 209 int sun4i_ss_des_setkey(struct crypto_skcipher *tfm, const u8 *key, 210 unsigned int keylen); 211 int sun4i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, 212 unsigned int keylen); 213 int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, 214 unsigned int slen, u8 *dst, unsigned int dlen); 215 int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); 216
