geode_crypto.h

linux for amd development lx8

#ifndef CRYPTO_H_

/* The key length is now and forever more 128 bits */

#define CRYPTO_KEY_LEN             16

#define CRYPTO_SESSION_HWKEY       0x001
#define CRYPTO_SESSION_ECB         0x010
#define CRYPTO_SESSION_CBC         0x020
#define CRYPTO_SESSION_NOCOHERENCY 0x100

#define CRYPTO_FLAG_DECRYPT        0x001
#define CRYPTO_FLAG_ENCRYPT        0x002

/* Size of the user block in the EEPROM */
#define EEPROM_SIZE                237

#define EEPROM_LOWER_RW            0x01
#define EEPROM_UPPER_RW            0x02

struct geode_crypt_session {
	unsigned int  flags;
	unsigned int  blocksize;
	unsigned char key[CRYPTO_KEY_LEN];
	int id;  
};

struct geode_crypt_op {
	int id;
	unsigned int  flags;
	unsigned int  len; 
	
	void *src;
	void *dst;
	void *iv;
};

struct geode_crypt_key {
	int id;
	unsigned char key[CRYPTO_KEY_LEN];
};

#define CIOCGSESSION  _IOWR('c', 101, struct geode_crypt_session *)
#define CIOCFSESSION  _IOW('c',  102, unsigned int)
#define CIOCCRYPT     _IOWR('c', 103, struct geode_crypt_op *)
#define CIOCSKEY      _IOW('c', 103,  struct geode_crypt_key *)

#define EIOCSKEYOFF   _IOW('c',  104, unsigned int)
#define EIOCSLOCKUP   _IOW('c',  105, unsigned int)
#define EIOCSLOCKLW   _IOW('c',  106, unsigned int)
#define EIOSKEY       _IOW('c',  107, unsigned char *)
#define EIOGPERMS     _IOR('c',  108, int)

#ifdef __KERNEL__

#define GEODE_CRYPT_MINOR_DEV 155

/* Doh - Cimarron is 156 */
#define GEODE_EEPROM_MINOR_DEV 157

#define AES_CONTROLA_REG  0x0000
#define AES_CONTROLB_REG  0x0004

/* Ctrl register bits */

#define AES_CTRL_START    0x01
#define AES_CTRL_DECRYPT  0x00 /* Default - but defined for simplicity */
#define AES_CTRL_ENCRYPT  0x02
#define AES_CTRL_WRKEY    0x04
#define AES_CTRL_DCA      0x08
#define AES_CTRL_SCA      0x10
#define AES_CTRL_CBCA     0x20

#define AES_INTERRUPT_REG 0x0008

#define AES_INTR_EEPROM_PENDING 0x40000
#define AES_INTR_B_PENDING      0x20000
#define AES_INTR_A_PENDING      0x10000

#define AES_INTR_PENDING        (AES_INTR_A_PENDING | AES_INTR_B_PENDING)

#define AES_INTR_EEPROM_MASK    0x00004
#define AES_INTR_A_MASK         0x00002
#define AES_INTR_B_MASK         0x00001

#define AES_SOURCEA_REG   0x0010
#define AES_DSTA_REG      0x0014
#define AES_LENA_REG      0x0018
#define AES_SOURCEB_REG   0x0020
#define AES_DSTB_REG      0x0024
#define AES_LENB_REG      0x0028
#define AES_WRITEKEY0_REG 0x0030
#define AES_WRITEKEY1_REG 0x0034
#define AES_WRITEKEY2_REG 0x0038
#define AES_WRITEKEY3_REG 0x003C
#define AES_WRITEIV0_REG  0x0040
#define AES_WRITEIV1_REG  0x0044
#define AES_WRITEIV2_REG  0x0048
#define AES_WRITEIV3_REG  0x004C

/* EEPROM definitions */

#define EEPROM_CTRL_REG   0x0800

#define EEPROM_CTRL_READ       0x00
#define EEPROM_CTRL_START      0x01
#define EEPROM_CTRL_WRITE      0x02
#define EEPROM_CTRL_EXCEPT     0x04
#define EEPROM_CTRL_KEYDISABLE 0x20

#define EEPROM_ADDR_REG   0x0804
#define EEPROM_DATA_REG   0x0808
#define EEPROM_SEC_REG    0x080C

#define EEPROM_ACCESS_WPL 0x0007
#define EEPROM_ACCESS_WPU 0x0070

/* Defines for the eeprom space map - only the key offset is used by 
   the driver, everywhere from 18 to 255 is the users space, and he only
   thinks he has 238 total bytes of space 
*/

#define EEPROM_WPL_OFFSET     0x00
#define EEPROM_WPE_OFFSET      0x01
#define EEPROM_KEY_OFFSET      0x02

#define EEPROM_ID_OFFSET       18
#define EEPROM_ULOWER_OFFSET   34
#define EEPROM_UUPPER_OFFSET   128

struct geode_crypt_ksession {
	u32 flags;
        u32 blocksize;
        u8  key[CRYPTO_KEY_LEN];
        int id;
	
	void *src;
	void *dest;
};

struct crypt_slist {
	int id;
	struct geode_crypt_ksession session;
	struct crypt_slist *next;
};

struct geode_crypt_driver {
  unsigned char *base;
  int flags;

  struct semaphore dev_mutex;
  struct semaphore engine_mutex;
  struct semaphore eeprom_mutex;

  int session_index;
  struct crypt_slist *session_list;
};

#endif 
#endif