aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/crypto/geode-aes.h
blob: f442ca972e3c0c88aa87e7790e5ada0b510b0155 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
/* Copyright (C) 2003-2006, Advanced Micro Devices, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef _GEODE_AES_H_
#define _GEODE_AES_H_

/* driver logic flags */
#define AES_MODE_ECB 0
#define AES_MODE_CBC 1

#define AES_DIR_DECRYPT 0
#define AES_DIR_ENCRYPT 1

#define AES_FLAGS_HIDDENKEY (1 << 0)

/* Register definitions */

#define AES_CTRLA_REG  0x0000

#define AES_CTRL_START     0x01
#define AES_CTRL_DECRYPT   0x00
#define AES_CTRL_ENCRYPT   0x02
#define AES_CTRL_WRKEY     0x04
#define AES_CTRL_DCA       0x08
#define AES_CTRL_SCA       0x10
#define AES_CTRL_CBC       0x20

#define AES_INTR_REG  0x0008

#define AES_INTRA_PENDING (1 << 16)
#define AES_INTRB_PENDING (1 << 17)

#define AES_INTR_PENDING  (AES_INTRA_PENDING | AES_INTRB_PENDING)
#define AES_INTR_MASK     0x07

#define AES_SOURCEA_REG   0x0010
#define AES_DSTA_REG      0x0014
#define AES_LENA_REG      0x0018
#define AES_WRITEKEY0_REG 0x0030
#define AES_WRITEIV0_REG  0x0040

/*  A very large counter that is used to gracefully bail out of an
 *  operation in case of trouble
 */

#define AES_OP_TIMEOUT    0x50000

struct geode_aes_op {

	void *src;
	void *dst;

	u32 mode;
	u32 dir;
	u32 flags;
	int len;

	u8 key[AES_KEYSIZE_128];
	u8 *iv;

	union {
		struct crypto_blkcipher *blk;
		struct crypto_cipher *cip;
	} fallback;
	u32 keylen;
};

#endif