#ifndef _LINUX_I8042_H
  #define _LINUX_I8042_H
  
  /*
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published by
   * the Free Software Foundation.
   */

  #include <linux/types.h>

  
  /*
   * Standard commands.
   */
  
  #define I8042_CMD_CTL_RCTR	0x0120
  #define I8042_CMD_CTL_WCTR	0x1060
  #define I8042_CMD_CTL_TEST	0x01aa
  
  #define I8042_CMD_KBD_DISABLE	0x00ad
  #define I8042_CMD_KBD_ENABLE	0x00ae
  #define I8042_CMD_KBD_TEST	0x01ab
  #define I8042_CMD_KBD_LOOP	0x11d2
  
  #define I8042_CMD_AUX_DISABLE	0x00a7
  #define I8042_CMD_AUX_ENABLE	0x00a8
  #define I8042_CMD_AUX_TEST	0x01a9
  #define I8042_CMD_AUX_SEND	0x10d4
  #define I8042_CMD_AUX_LOOP	0x11d3
  
  #define I8042_CMD_MUX_PFX	0x0090
  #define I8042_CMD_MUX_SEND	0x1090

  struct serio;
  
  #if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE)
  
  void i8042_lock_chip(void);
  void i8042_unlock_chip(void);

  int i8042_command(unsigned char *param, int command);

  bool i8042_check_port_owner(const struct serio *);

  int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
  					struct serio *serio));
  int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
  				       struct serio *serio));

  
  #else

  static inline void i8042_lock_chip(void)

  {
  }

  static inline void i8042_unlock_chip(void)

  {
  }

  static inline int i8042_command(unsigned char *param, int command)

  {

  	return -ENODEV;

  }

  static inline bool i8042_check_port_owner(const struct serio *serio)

  {
  	return false;
  }

  static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,

  					struct serio *serio))
  {
  	return -ENODEV;
  }

  static inline int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,

  				       struct serio *serio))
  {
  	return -ENODEV;
  }

  #endif

  
  #endif