tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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);