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_MODE_ECB 0
  14 #define AES_MODE_CBC 1
  15
  16 #define AES_DIR_DECRYPT 0
  17 #define AES_DIR_ENCRYPT 1
  18
  19 #define AES_FLAGS_HIDDENKEY (1 << 0)
  20
  21 /* Register definitions */
  22
  23 #define AES_CTRLA_REG  0x0000
  24
  25 #define AES_CTRL_START     0x01
  26 #define AES_CTRL_DECRYPT   0x00
  27 #define AES_CTRL_ENCRYPT   0x02
  28 #define AES_CTRL_WRKEY     0x04
  29 #define AES_CTRL_DCA       0x08
  30 #define AES_CTRL_SCA       0x10
  31 #define AES_CTRL_CBC       0x20
  32
  33 #define AES_INTR_REG  0x0008
  34
  35 #define AES_INTRA_PENDING (1 << 16)
  36 #define AES_INTRB_PENDING (1 << 17)
  37
  38 #define AES_INTR_PENDING  (AES_INTRA_PENDING | AES_INTRB_PENDING)
  39 #define AES_INTR_MASK     0x07
  40
  41 #define AES_SOURCEA_REG   0x0010
  42 #define AES_DSTA_REG      0x0014
  43 #define AES_LENA_REG      0x0018
  44 #define AES_WRITEKEY0_REG 0x0030
  45 #define AES_WRITEIV0_REG  0x0040
  46
  47 /*  A very large counter that is used to gracefully bail out of an
  48  *  operation in case of trouble
  49  */
  50
  51 #define AES_OP_TIMEOUT    0x50000
  52
  53 struct geode_aes_op {
  54
  55         void *src;
  56         void *dst;
  57
  58         u32 mode;
  59         u32 dir;
  60         u32 flags;
  61         int len;
  62
  63         u8 key[AES_KEYSIZE_128];
  64         u8 *iv;
  65
  66         union {
  67                 struct crypto_blkcipher *blk;
  68                 struct crypto_cipher *cip;
  69         } fallback;
  70         u32 keylen;
  71 };
  72
  73 #endif