/*
   * Definitions for ADB (Apple Desktop Bus) support.
   */
  #ifndef __ADB_H
  #define __ADB_H
  
  /* ADB commands */
  #define ADB_BUSRESET		0
  #define ADB_FLUSH(id)		(0x01 | ((id) << 4))
  #define ADB_WRITEREG(id, reg)	(0x08 | (reg) | ((id) << 4))
  #define ADB_READREG(id, reg)	(0x0C | (reg) | ((id) << 4))
  
  /* ADB default device IDs (upper 4 bits of ADB command byte) */
  #define ADB_DONGLE	1	/* "software execution control" devices */
  #define ADB_KEYBOARD	2
  #define ADB_MOUSE	3
  #define ADB_TABLET	4
  #define ADB_MODEM	5
  #define ADB_MISC	7	/* maybe a monitor */
  
  #define ADB_RET_OK	0
  #define ADB_RET_TIMEOUT	3
  
  /* The kind of ADB request. The controller may emulate some
     or all of those CUDA/PMU packet kinds */
  #define ADB_PACKET	0
  #define CUDA_PACKET	1
  #define ERROR_PACKET	2
  #define TIMER_PACKET	3
  #define POWER_PACKET	4
  #define MACIIC_PACKET	5
  #define PMU_PACKET	6
  #define ADB_QUERY	7
  
  /* ADB queries */
  
  /* ADB_QUERY_GETDEVINFO
   * Query ADB slot for device presence
   * data[2] = id, rep[0] = orig addr, rep[1] = handler_id
   */
  #define ADB_QUERY_GETDEVINFO	1
  
  #ifdef __KERNEL__
  
  struct adb_request {
  	unsigned char data[32];
  	int nbytes;
  	unsigned char reply[32];
  	int reply_len;
  	unsigned char reply_expected;
  	unsigned char sent;
  	unsigned char complete;
  	void (*done)(struct adb_request *);
  	void *arg;
  	struct adb_request *next;
  };
  
  struct adb_ids {
  	int nids;
  	unsigned char id[16];
  };
  
  /* Structure which encapsulates a low-level ADB driver */
  
  struct adb_driver {
  	char name[16];
  	int (*probe)(void);
  	int (*init)(void);
  	int (*send_request)(struct adb_request *req, int sync);
  	int (*autopoll)(int devs);
  	void (*poll)(void);
  	int (*reset_bus)(void);
  };
  
  /* Values for adb_request flags */
  #define ADBREQ_REPLY	1	/* expect reply */
  #define ADBREQ_SYNC	2	/* poll until done */
  #define ADBREQ_NOSEND	4	/* build the request, but don't send it */
  
  /* Messages sent thru the client_list notifier. You should NOT stop
     the operation, at least not with this version */
  enum adb_message {
      ADB_MSG_POWERDOWN,	/* Currently called before sleep only */
      ADB_MSG_PRE_RESET,	/* Called before resetting the bus */
      ADB_MSG_POST_RESET	/* Called after resetting the bus (re-do init & register) */
  };

  extern struct blocking_notifier_head adb_client_list;

  
  int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
  		int flags, int nbytes, ...);
  int adb_register(int default_id,int handler_id,struct adb_ids *ids,

  		 void (*handler)(unsigned char *, int, int));

  int adb_unregister(int index);
  void adb_poll(void);

  void adb_input(unsigned char *, int, int);

  int adb_reset_bus(void);
  
  int adb_try_handler_change(int address, int new_id);
  int adb_get_infos(int address, int *original_address, int *handler_id);
  
  #endif /* __KERNEL__ */
  
  #endif /* __ADB_H */