LXR linux/drivers/crypto/sunxi-ss/sun4i-ss.h

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