drivers/crypto/padlock-generic.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Support for VIA PadLock hardware crypto engine.
   5  *
   6  * Copyright (c) 2004  Michal Ludvig <michal@logix.cz>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/types.h>
  17 #include <linux/errno.h>
  18 #include <linux/crypto.h>
  19 #include <asm/byteorder.h>
  20 #include "padlock.h"
  21
  22 static int __init
  23 padlock_init(void)
  24 {
  25         int ret = -ENOSYS;
  26
  27         if (!cpu_has_xcrypt) {
  28                 printk(KERN_ERR PFX "VIA PadLock not detected.\n");
  29                 return -ENODEV;
  30         }
  31
  32         if (!cpu_has_xcrypt_enabled) {
  33                 printk(KERN_ERR PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
  34                 return -ENODEV;
  35         }
  36
  37 #ifdef CONFIG_CRYPTO_DEV_PADLOCK_AES
  38         if ((ret = padlock_init_aes())) {
  39                 printk(KERN_ERR PFX "VIA PadLock AES initialization failed.\n");
  40                 return ret;
  41         }
  42 #endif
  43
  44         if (ret == -ENOSYS)
  45                 printk(KERN_ERR PFX "Hmm, VIA PadLock was compiled without any algorithm.\n");
  46
  47         return ret;
  48 }
  49
  50 static void __exit
  51 padlock_fini(void)
  52 {
  53 #ifdef CONFIG_CRYPTO_DEV_PADLOCK_AES
  54         padlock_fini_aes();
  55 #endif
  56 }
  57
  58 module_init(padlock_init);
  59 module_exit(padlock_fini);
  60
  61 MODULE_DESCRIPTION("VIA PadLock crypto engine support.");
  62 MODULE_LICENSE("Dual BSD/GPL");
  63 MODULE_AUTHOR("Michal Ludvig");