linux/drivers/crypto/geode-aes.h
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   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_IV_LENGTH  16
  14#define AES_KEY_LENGTH 16
  15#define AES_MIN_BLOCK_SIZE 16
  16
  17#define AES_MODE_ECB 0
  18#define AES_MODE_CBC 1
  19
  20#define AES_DIR_DECRYPT 0
  21#define AES_DIR_ENCRYPT 1
  22
  23#define AES_FLAGS_HIDDENKEY (1 << 0)
  24
  25/* Register definitions */
  26
  27#define AES_CTRLA_REG  0x0000
  28
  29#define AES_CTRL_START     0x01
  30#define AES_CTRL_DECRYPT   0x00
  31#define AES_CTRL_ENCRYPT   0x02
  32#define AES_CTRL_WRKEY     0x04
  33#define AES_CTRL_DCA       0x08
  34#define AES_CTRL_SCA       0x10
  35#define AES_CTRL_CBC       0x20
  36
  37#define AES_INTR_REG  0x0008
  38
  39#define AES_INTRA_PENDING (1 << 16)
  40#define AES_INTRB_PENDING (1 << 17)
  41
  42#define AES_INTR_PENDING  (AES_INTRA_PENDING | AES_INTRB_PENDING)
  43#define AES_INTR_MASK     0x07
  44
  45#define AES_SOURCEA_REG   0x0010
  46#define AES_DSTA_REG      0x0014
  47#define AES_LENA_REG      0x0018
  48#define AES_WRITEKEY0_REG 0x0030
  49#define AES_WRITEIV0_REG  0x0040
  50
  51/*  A very large counter that is used to gracefully bail out of an
  52 *  operation in case of trouble
  53 */
  54
  55#define AES_OP_TIMEOUT    0x50000
  56
  57struct geode_aes_op {
  58
  59        void *src;
  60        void *dst;
  61
  62        u32 mode;
  63        u32 dir;
  64        u32 flags;
  65        int len;
  66
  67        u8 key[AES_KEY_LENGTH];
  68        u8 *iv;
  69
  70        union {
  71                struct crypto_blkcipher *blk;
  72                struct crypto_cipher *cip;
  73        } fallback;
  74        u32 keylen;
  75};
  76
  77#endif
  78
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