drivers/crypto/geode-aes.h

   1 /* Copyright (C) 2003-2006, Advanced Micro Devices, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  */
   8
   9 #ifndef _GEODE_AES_H_
  10 #define _GEODE_AES_H_
  11
  12 /* driver logic flags */
  13 #define AES_KEY_LENGTH 16
  14
  15 #define AES_MODE_ECB 0
  16 #define AES_MODE_CBC 1
  17
  18 #define AES_DIR_DECRYPT 0
  19 #define AES_DIR_ENCRYPT 1
  20
  21 #define AES_FLAGS_HIDDENKEY (1 << 0)
  22
  23 /* Register definitions */
  24
  25 #define AES_CTRLA_REG  0x0000
  26
  27 #define AES_CTRL_START     0x01
  28 #define AES_CTRL_DECRYPT   0x00
  29 #define AES_CTRL_ENCRYPT   0x02
  30 #define AES_CTRL_WRKEY     0x04
  31 #define AES_CTRL_DCA       0x08
  32 #define AES_CTRL_SCA       0x10
  33 #define AES_CTRL_CBC       0x20
  34
  35 #define AES_INTR_REG  0x0008
  36
  37 #define AES_INTRA_PENDING (1 << 16)
  38 #define AES_INTRB_PENDING (1 << 17)
  39
  40 #define AES_INTR_PENDING  (AES_INTRA_PENDING | AES_INTRB_PENDING)
  41 #define AES_INTR_MASK     0x07
  42
  43 #define AES_SOURCEA_REG   0x0010
  44 #define AES_DSTA_REG      0x0014
  45 #define AES_LENA_REG      0x0018
  46 #define AES_WRITEKEY0_REG 0x0030
  47 #define AES_WRITEIV0_REG  0x0040
  48
  49 /*  A very large counter that is used to gracefully bail out of an
  50  *  operation in case of trouble
  51  */
  52
  53 #define AES_OP_TIMEOUT    0x50000
  54
  55 struct geode_aes_op {
  56
  57         void *src;
  58         void *dst;
  59
  60         u32 mode;
  61         u32 dir;
  62         u32 flags;
  63         int len;
  64
  65         u8 key[AES_KEY_LENGTH];
  66         u8 *iv;
  67
  68         union {
  69                 struct crypto_blkcipher *blk;
  70                 struct crypto_cipher *cip;
  71         } fallback;
  72         u32 keylen;
  73 };
  74
  75 #endif