[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / thermal.h

/*
 *  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>

#define THERMAL_TRIPS_NONE	-1
#define THERMAL_MAX_TRIPS	12
#define THERMAL_NAME_LENGTH	20

/* No upper/lower limit requirement */
#define THERMAL_NO_LIMIT	-1UL

/* Unit conversion macros */
#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)

/* Adding event notification support elements */
#define THERMAL_GENL_FAMILY_NAME                "thermal_event"
#define THERMAL_GENL_VERSION                    0x01
#define THERMAL_GENL_MCAST_GROUP_NAME           "thermal_mc_group"

/* Default Thermal Governor: Does Linear Throttling */
#define DEFAULT_THERMAL_GOVERNOR	"step_wise"

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,
};

enum thermal_trend {
	THERMAL_TREND_STABLE, /* temperature is stable */
	THERMAL_TREND_RAISING, /* temperature is raising */
	THERMAL_TREND_DROPPING, /* temperature is dropping */
};

/* Events supported by Thermal Netlink */
enum events {
	THERMAL_AUX0,
	THERMAL_AUX1,
	THERMAL_CRITICAL,
	THERMAL_DEV_FAULT,
};

/* attributes of thermal_genl_family */
enum {
	THERMAL_GENL_ATTR_UNSPEC,
	THERMAL_GENL_ATTR_EVENT,
	__THERMAL_GENL_ATTR_MAX,
};
#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)

/* commands supported by the thermal_genl_family */
enum {
	THERMAL_GENL_CMD_UNSPEC,
	THERMAL_GENL_CMD_EVENT,
	__THERMAL_GENL_CMD_MAX,
};
#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)

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 (*set_trip_temp) (struct thermal_zone_device *, int,
			      unsigned long);
	int (*get_trip_hyst) (struct thermal_zone_device *, int,
			      unsigned long *);
	int (*set_trip_hyst) (struct thermal_zone_device *, int,
			      unsigned long);
	int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
	int (*get_trend) (struct thermal_zone_device *, int,
			  enum thermal_trend *);
	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);
};

struct thermal_cooling_device {
	int id;
	char type[THERMAL_NAME_LENGTH];
	struct device device;
	void *devdata;
	const struct thermal_cooling_device_ops *ops;
	bool updated; /* true if the cooling device does not need update */
	struct mutex lock; /* protect thermal_instances list */
	struct list_head thermal_instances;
	struct list_head node;
};

struct thermal_attr {
	struct device_attribute attr;
	char name[THERMAL_NAME_LENGTH];
};

struct thermal_zone_device {
	int id;
	char type[THERMAL_NAME_LENGTH];
	struct device device;
	struct thermal_attr *trip_temp_attrs;
	struct thermal_attr *trip_type_attrs;
	struct thermal_attr *trip_hyst_attrs;
	void *devdata;
	int trips;
	int passive_delay;
	int polling_delay;
	int temperature;
	int last_temperature;
	int passive;
	unsigned int forced_passive;
	const struct thermal_zone_device_ops *ops;
	const struct thermal_zone_params *tzp;
	struct thermal_governor *governor;
	struct list_head thermal_instances;
	struct idr idr;
	struct mutex lock; /* protect thermal_instances list */
	struct list_head node;
	struct delayed_work poll_queue;
};

/* Structure that holds thermal governor information */
struct thermal_governor {
	char name[THERMAL_NAME_LENGTH];
	int (*throttle)(struct thermal_zone_device *tz, int trip);
	struct list_head	governor_list;
	struct module		*owner;
};

/* Structure that holds binding parameters for a zone */
struct thermal_bind_params {
	struct thermal_cooling_device *cdev;

	/*
	 * This is a measure of 'how effectively these devices can
	 * cool 'this' thermal zone. The shall be determined by platform
	 * characterization. This is on a 'percentage' scale.
	 * See Documentation/thermal/sysfs-api.txt for more information.
	 */
	int weight;

	/*
	 * This is a bit mask that gives the binding relation between this
	 * thermal zone and cdev, for a particular trip point.
	 * See Documentation/thermal/sysfs-api.txt for more information.
	 */
	int trip_mask;
	int (*match) (struct thermal_zone_device *tz,
			struct thermal_cooling_device *cdev);
};

/* Structure to define Thermal Zone parameters */
struct thermal_zone_params {
	char governor_name[THERMAL_NAME_LENGTH];
	int num_tbps;	/* Number of tbp entries */
	struct thermal_bind_params *tbp;
};

struct thermal_genl_event {
	u32 orig;
	enum events event;
};

/* Function declarations */
struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
		void *, const struct thermal_zone_device_ops *,
		const struct thermal_zone_params *, int, int);
void thermal_zone_device_unregister(struct thermal_zone_device *);

int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
				     struct thermal_cooling_device *,
				     unsigned long, unsigned long);
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 *,
		const struct thermal_cooling_device_ops *);
void thermal_cooling_device_unregister(struct thermal_cooling_device *);

int get_tz_trend(struct thermal_zone_device *, int);
struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
		struct thermal_cooling_device *, int);
void thermal_cdev_update(struct thermal_cooling_device *);
void notify_thermal_framework(struct thermal_zone_device *, int);

int thermal_register_governor(struct thermal_governor *);
void thermal_unregister_governor(struct thermal_governor *);

#ifdef CONFIG_NET
extern int thermal_generate_netlink_event(u32 orig, enum events event);
#else
static inline int thermal_generate_netlink_event(u32 orig, enum events event)
{
	return 0;
}
#endif

#endif /* __THERMAL_H__ */
Commit	Line	Data
203d3d4a ZR	1	/*
	2	* thermal.h ($Revision: 0 $)
	3	*
	4	* Copyright (C) 2008 Intel Corp
	5	* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
	6	* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
	7	*
	8	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; version 2 of the License.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	21	*
	22	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	23	*/
	24
	25	#ifndef __THERMAL_H__
	26	#define __THERMAL_H__
	27
	28	#include <linux/idr.h>
	29	#include <linux/device.h>
b1569e99	30	#include <linux/workqueue.h>
203d3d4a	31
23064088 D	32	#define THERMAL_TRIPS_NONE -1
	33	#define THERMAL_MAX_TRIPS 12
	34	#define THERMAL_NAME_LENGTH 20
	35
	36	/* No upper/lower limit requirement */
	37	#define THERMAL_NO_LIMIT -1UL
	38
	39	/* Unit conversion macros */
	40	#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
	41	((long)t-2732+5)/10 : ((long)t-2732-5)/10)
	42	#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
	43
	44	/* Adding event notification support elements */
	45	#define THERMAL_GENL_FAMILY_NAME "thermal_event"
	46	#define THERMAL_GENL_VERSION 0x01
	47	#define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
	48
a4a15485 D	49	/* Default Thermal Governor: Does Linear Throttling */
	50	#define DEFAULT_THERMAL_GOVERNOR "step_wise"
	51
203d3d4a ZR	52	struct thermal_zone_device;
	53	struct thermal_cooling_device;
	54
6503e5df MG	55	enum thermal_device_mode {
	56	THERMAL_DEVICE_DISABLED = 0,
	57	THERMAL_DEVICE_ENABLED,
	58	};
	59
	60	enum thermal_trip_type {
	61	THERMAL_TRIP_ACTIVE = 0,
	62	THERMAL_TRIP_PASSIVE,
	63	THERMAL_TRIP_HOT,
	64	THERMAL_TRIP_CRITICAL,
	65	};
	66
601f3d42 ZR	67	enum thermal_trend {
	68	THERMAL_TREND_STABLE, /* temperature is stable */
	69	THERMAL_TREND_RAISING, /* temperature is raising */
	70	THERMAL_TREND_DROPPING, /* temperature is dropping */
	71	};
	72
23064088 D	73	/* Events supported by Thermal Netlink */
	74	enum events {
	75	THERMAL_AUX0,
	76	THERMAL_AUX1,
	77	THERMAL_CRITICAL,
	78	THERMAL_DEV_FAULT,
	79	};
	80
	81	/* attributes of thermal_genl_family */
	82	enum {
	83	THERMAL_GENL_ATTR_UNSPEC,
	84	THERMAL_GENL_ATTR_EVENT,
	85	__THERMAL_GENL_ATTR_MAX,
	86	};
	87	#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
	88
	89	/* commands supported by the thermal_genl_family */
	90	enum {
	91	THERMAL_GENL_CMD_UNSPEC,
	92	THERMAL_GENL_CMD_EVENT,
	93	__THERMAL_GENL_CMD_MAX,
	94	};
	95	#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
	96
203d3d4a ZR	97	struct thermal_zone_device_ops {
	98	int (bind) (struct thermal_zone_device ,
	99	struct thermal_cooling_device *);
	100	int (unbind) (struct thermal_zone_device ,
	101	struct thermal_cooling_device *);
6503e5df MG	102	int (get_temp) (struct thermal_zone_device , unsigned long *);
	103	int (get_mode) (struct thermal_zone_device ,
	104	enum thermal_device_mode *);
	105	int (set_mode) (struct thermal_zone_device ,
	106	enum thermal_device_mode);
	107	int (get_trip_type) (struct thermal_zone_device , int,
	108	enum thermal_trip_type *);
	109	int (get_trip_temp) (struct thermal_zone_device , int,
	110	unsigned long *);
c56f5c03 D	111	int (set_trip_temp) (struct thermal_zone_device , int,
c56f5c03 D	112	unsigned long);
27365a6c D	113	int (get_trip_hyst) (struct thermal_zone_device , int,
	114	unsigned long *);
	115	int (set_trip_hyst) (struct thermal_zone_device , int,
	116	unsigned long);
9ec732ff	117	int (get_crit_temp) (struct thermal_zone_device , unsigned long *);
601f3d42 ZR	118	int (get_trend) (struct thermal_zone_device , int,
601f3d42 ZR	119	enum thermal_trend *);
b1569e99 MG	120	int (notify) (struct thermal_zone_device , int,
b1569e99 MG	121	enum thermal_trip_type);
203d3d4a ZR	122	};
	123
	124	struct thermal_cooling_device_ops {
6503e5df MG	125	int (get_max_state) (struct thermal_cooling_device , unsigned long *);
	126	int (get_cur_state) (struct thermal_cooling_device , unsigned long *);
	127	int (set_cur_state) (struct thermal_cooling_device , unsigned long);
203d3d4a ZR	128	};
203d3d4a ZR	129
203d3d4a ZR	130	struct thermal_cooling_device {
	131	int id;
	132	char type[THERMAL_NAME_LENGTH];
	133	struct device device;
	134	void *devdata;
5b275ce2	135	const struct thermal_cooling_device_ops *ops;
ce119f83	136	bool updated; /* true if the cooling device does not need update */
f4a821ce	137	struct mutex lock; /* protect thermal_instances list */
b5e4ae62	138	struct list_head thermal_instances;
203d3d4a ZR	139	struct list_head node;
	140	};
	141
c56f5c03 D	142	struct thermal_attr {
	143	struct device_attribute attr;
	144	char name[THERMAL_NAME_LENGTH];
	145	};
	146
203d3d4a ZR	147	struct thermal_zone_device {
	148	int id;
	149	char type[THERMAL_NAME_LENGTH];
	150	struct device device;
c56f5c03 D	151	struct thermal_attr *trip_temp_attrs;
c56f5c03 D	152	struct thermal_attr *trip_type_attrs;
27365a6c	153	struct thermal_attr *trip_hyst_attrs;
203d3d4a ZR	154	void *devdata;
203d3d4a ZR	155	int trips;
b1569e99 MG	156	int passive_delay;
b1569e99 MG	157	int polling_delay;
601f3d42	158	int temperature;
b1569e99	159	int last_temperature;
908b9fb7	160	int passive;
03a971a2	161	unsigned int forced_passive;
5b275ce2	162	const struct thermal_zone_device_ops *ops;
ef873947	163	const struct thermal_zone_params *tzp;
a4a15485	164	struct thermal_governor *governor;
2d374139	165	struct list_head thermal_instances;
203d3d4a	166	struct idr idr;
2d374139	167	struct mutex lock; /* protect thermal_instances list */
203d3d4a	168	struct list_head node;
b1569e99	169	struct delayed_work poll_queue;
203d3d4a	170	};
4cb18728	171
a4a15485 D	172	/* Structure that holds thermal governor information */
	173	struct thermal_governor {
	174	char name[THERMAL_NAME_LENGTH];
	175	int (throttle)(struct thermal_zone_device tz, int trip);
	176	struct list_head governor_list;
	177	struct module *owner;
	178	};
	179
ef873947 D	180	/* Structure that holds binding parameters for a zone */
	181	struct thermal_bind_params {
	182	struct thermal_cooling_device *cdev;
	183
	184	/*
	185	* This is a measure of 'how effectively these devices can
	186	* cool 'this' thermal zone. The shall be determined by platform
	187	* characterization. This is on a 'percentage' scale.
	188	* See Documentation/thermal/sysfs-api.txt for more information.
	189	*/
	190	int weight;
	191
	192	/*
	193	* This is a bit mask that gives the binding relation between this
	194	* thermal zone and cdev, for a particular trip point.
	195	* See Documentation/thermal/sysfs-api.txt for more information.
	196	*/
	197	int trip_mask;
	198	int (match) (struct thermal_zone_device tz,
	199	struct thermal_cooling_device *cdev);
	200	};
	201
	202	/* Structure to define Thermal Zone parameters */
	203	struct thermal_zone_params {
a4a15485	204	char governor_name[THERMAL_NAME_LENGTH];
ef873947 D	205	int num_tbps; /* Number of tbp entries */
	206	struct thermal_bind_params *tbp;
	207	};
	208
4cb18728 D	209	struct thermal_genl_event {
	210	u32 orig;
	211	enum events event;
	212	};
203d3d4a	213
23064088	214	/* Function declarations */
4b1bf587	215	struct thermal_zone_device thermal_zone_device_register(const char , int, int,
50125a9b D	216	void , const struct thermal_zone_device_ops ,
50125a9b D	217	const struct thermal_zone_params *, int, int);
203d3d4a ZR	218	void thermal_zone_device_unregister(struct thermal_zone_device *);
	219
	220	int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
9d99842f ZR	221	struct thermal_cooling_device *,
9d99842f ZR	222	unsigned long, unsigned long);
203d3d4a ZR	223	int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
203d3d4a ZR	224	struct thermal_cooling_device *);
b1569e99	225	void thermal_zone_device_update(struct thermal_zone_device *);
23064088	226
203d3d4a	227	struct thermal_cooling_device thermal_cooling_device_register(char , void *,
5b275ce2	228	const struct thermal_cooling_device_ops *);
203d3d4a	229	void thermal_cooling_device_unregister(struct thermal_cooling_device *);
af06216a	230
9b4298a0 D	231	int get_tz_trend(struct thermal_zone_device *, int);
	232	struct thermal_instance get_thermal_instance(struct thermal_zone_device ,
	233	struct thermal_cooling_device *, int);
dc765482	234	void thermal_cdev_update(struct thermal_cooling_device *);
f2b4caaf	235	void notify_thermal_framework(struct thermal_zone_device *, int);
9b4298a0	236
a4a15485 D	237	int thermal_register_governor(struct thermal_governor *);
	238	void thermal_unregister_governor(struct thermal_governor *);
	239
af06216a	240	#ifdef CONFIG_NET
2d58d7ea	241	extern int thermal_generate_netlink_event(u32 orig, enum events event);
af06216a	242	#else
2d58d7ea	243	static inline int thermal_generate_netlink_event(u32 orig, enum events event)
af06216a RW	244	{
	245	return 0;
	246	}
	247	#endif
203d3d4a	248
a0dd25b2	249	#endif /* __THERMAL_H__ */