/*
   *  thermal.h  ($Revision: 0 $)
   *
   *  Copyright (C) 2008  Intel Corp
   *  Copyright (C) 2008  Zhang Rui <rui.zhang@intel.com>
   *  Copyright (C) 2008  Sujith Thomas <sujith.thomas@intel.com>
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; version 2 of the License.
   *
   *  This program is distributed in the hope that it will be useful, but
   *  WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   */
  
  #ifndef __THERMAL_H__
  #define __THERMAL_H__
  
  #include <linux/idr.h>
  #include <linux/device.h>

  #include <linux/workqueue.h>

  
  struct thermal_zone_device;
  struct thermal_cooling_device;

  enum thermal_device_mode {
  	THERMAL_DEVICE_DISABLED = 0,
  	THERMAL_DEVICE_ENABLED,
  };
  
  enum thermal_trip_type {
  	THERMAL_TRIP_ACTIVE = 0,
  	THERMAL_TRIP_PASSIVE,
  	THERMAL_TRIP_HOT,
  	THERMAL_TRIP_CRITICAL,
  };

  struct thermal_zone_device_ops {
  	int (*bind) (struct thermal_zone_device *,
  		     struct thermal_cooling_device *);
  	int (*unbind) (struct thermal_zone_device *,
  		       struct thermal_cooling_device *);

  	int (*get_temp) (struct thermal_zone_device *, unsigned long *);
  	int (*get_mode) (struct thermal_zone_device *,
  			 enum thermal_device_mode *);
  	int (*set_mode) (struct thermal_zone_device *,
  		enum thermal_device_mode);
  	int (*get_trip_type) (struct thermal_zone_device *, int,
  		enum thermal_trip_type *);
  	int (*get_trip_temp) (struct thermal_zone_device *, int,
  			      unsigned long *);

  	int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);

  	int (*notify) (struct thermal_zone_device *, int,
  		       enum thermal_trip_type);

  };
  
  struct thermal_cooling_device_ops {

  	int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
  	int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
  	int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);

  };
  
  #define THERMAL_TRIPS_NONE -1

  #define THERMAL_MAX_TRIPS 12

  #define THERMAL_NAME_LENGTH 20
  struct thermal_cooling_device {
  	int id;
  	char type[THERMAL_NAME_LENGTH];
  	struct device device;
  	void *devdata;
  	struct thermal_cooling_device_ops *ops;
  	struct list_head node;
  };

  #define KELVIN_TO_CELSIUS(t)	(long)(((long)t-2732 >= 0) ?	\
  				((long)t-2732+5)/10 : ((long)t-2732-5)/10)
  #define CELSIUS_TO_KELVIN(t)	((t)*10+2732)

  #if defined(CONFIG_THERMAL_HWMON)

  /* thermal zone devices with the same type share one hwmon device */
  struct thermal_hwmon_device {
  	char type[THERMAL_NAME_LENGTH];
  	struct device *device;
  	int count;
  	struct list_head tz_list;
  	struct list_head node;
  };
  
  struct thermal_hwmon_attr {
  	struct device_attribute attr;
  	char name[16];
  };
  #endif

  struct thermal_zone_device {
  	int id;
  	char type[THERMAL_NAME_LENGTH];
  	struct device device;
  	void *devdata;
  	int trips;

  	int tc1;
  	int tc2;
  	int passive_delay;
  	int polling_delay;
  	int last_temperature;
  	bool passive;

  	unsigned int forced_passive;

  	struct thermal_zone_device_ops *ops;
  	struct list_head cooling_devices;
  	struct idr idr;
  	struct mutex lock;	/* protect cooling devices list */
  	struct list_head node;

  	struct delayed_work poll_queue;

  #if defined(CONFIG_THERMAL_HWMON)

  	struct list_head hwmon_node;
  	struct thermal_hwmon_device *hwmon;
  	struct thermal_hwmon_attr temp_input;	/* hwmon sys attr */
  	struct thermal_hwmon_attr temp_crit;	/* hwmon sys attr */
  #endif

  };
  
  struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,

  							 struct
  							 thermal_zone_device_ops

  							 *, int tc1, int tc2,
  							 int passive_freq,
  							 int polling_freq);

  void thermal_zone_device_unregister(struct thermal_zone_device *);
  
  int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
  				     struct thermal_cooling_device *);
  int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
  				       struct thermal_cooling_device *);

  void thermal_zone_device_update(struct thermal_zone_device *);

  struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,

  							       struct
  							       thermal_cooling_device_ops
  							       *);

  void thermal_cooling_device_unregister(struct thermal_cooling_device *);

  #endif /* __THERMAL_H__ */