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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 | ||
203d3d4a ZR |
49 | struct thermal_zone_device; |
50 | struct thermal_cooling_device; | |
51 | ||
6503e5df MG |
52 | enum thermal_device_mode { |
53 | THERMAL_DEVICE_DISABLED = 0, | |
54 | THERMAL_DEVICE_ENABLED, | |
55 | }; | |
56 | ||
57 | enum thermal_trip_type { | |
58 | THERMAL_TRIP_ACTIVE = 0, | |
59 | THERMAL_TRIP_PASSIVE, | |
60 | THERMAL_TRIP_HOT, | |
61 | THERMAL_TRIP_CRITICAL, | |
62 | }; | |
63 | ||
601f3d42 ZR |
64 | enum thermal_trend { |
65 | THERMAL_TREND_STABLE, /* temperature is stable */ | |
66 | THERMAL_TREND_RAISING, /* temperature is raising */ | |
67 | THERMAL_TREND_DROPPING, /* temperature is dropping */ | |
68 | }; | |
69 | ||
23064088 D |
70 | /* Events supported by Thermal Netlink */ |
71 | enum events { | |
72 | THERMAL_AUX0, | |
73 | THERMAL_AUX1, | |
74 | THERMAL_CRITICAL, | |
75 | THERMAL_DEV_FAULT, | |
76 | }; | |
77 | ||
78 | /* attributes of thermal_genl_family */ | |
79 | enum { | |
80 | THERMAL_GENL_ATTR_UNSPEC, | |
81 | THERMAL_GENL_ATTR_EVENT, | |
82 | __THERMAL_GENL_ATTR_MAX, | |
83 | }; | |
84 | #define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1) | |
85 | ||
86 | /* commands supported by the thermal_genl_family */ | |
87 | enum { | |
88 | THERMAL_GENL_CMD_UNSPEC, | |
89 | THERMAL_GENL_CMD_EVENT, | |
90 | __THERMAL_GENL_CMD_MAX, | |
91 | }; | |
92 | #define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1) | |
93 | ||
203d3d4a ZR |
94 | struct thermal_zone_device_ops { |
95 | int (*bind) (struct thermal_zone_device *, | |
96 | struct thermal_cooling_device *); | |
97 | int (*unbind) (struct thermal_zone_device *, | |
98 | struct thermal_cooling_device *); | |
6503e5df MG |
99 | int (*get_temp) (struct thermal_zone_device *, unsigned long *); |
100 | int (*get_mode) (struct thermal_zone_device *, | |
101 | enum thermal_device_mode *); | |
102 | int (*set_mode) (struct thermal_zone_device *, | |
103 | enum thermal_device_mode); | |
104 | int (*get_trip_type) (struct thermal_zone_device *, int, | |
105 | enum thermal_trip_type *); | |
106 | int (*get_trip_temp) (struct thermal_zone_device *, int, | |
107 | unsigned long *); | |
c56f5c03 D |
108 | int (*set_trip_temp) (struct thermal_zone_device *, int, |
109 | unsigned long); | |
27365a6c D |
110 | int (*get_trip_hyst) (struct thermal_zone_device *, int, |
111 | unsigned long *); | |
112 | int (*set_trip_hyst) (struct thermal_zone_device *, int, | |
113 | unsigned long); | |
9ec732ff | 114 | int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *); |
601f3d42 ZR |
115 | int (*get_trend) (struct thermal_zone_device *, int, |
116 | enum thermal_trend *); | |
b1569e99 MG |
117 | int (*notify) (struct thermal_zone_device *, int, |
118 | enum thermal_trip_type); | |
203d3d4a ZR |
119 | }; |
120 | ||
121 | struct thermal_cooling_device_ops { | |
6503e5df MG |
122 | int (*get_max_state) (struct thermal_cooling_device *, unsigned long *); |
123 | int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *); | |
124 | int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); | |
203d3d4a ZR |
125 | }; |
126 | ||
203d3d4a ZR |
127 | struct thermal_cooling_device { |
128 | int id; | |
129 | char type[THERMAL_NAME_LENGTH]; | |
130 | struct device device; | |
131 | void *devdata; | |
5b275ce2 | 132 | const struct thermal_cooling_device_ops *ops; |
ce119f83 | 133 | bool updated; /* true if the cooling device does not need update */ |
f4a821ce | 134 | struct mutex lock; /* protect thermal_instances list */ |
b5e4ae62 | 135 | struct list_head thermal_instances; |
203d3d4a ZR |
136 | struct list_head node; |
137 | }; | |
138 | ||
c56f5c03 D |
139 | struct thermal_attr { |
140 | struct device_attribute attr; | |
141 | char name[THERMAL_NAME_LENGTH]; | |
142 | }; | |
143 | ||
203d3d4a ZR |
144 | struct thermal_zone_device { |
145 | int id; | |
146 | char type[THERMAL_NAME_LENGTH]; | |
147 | struct device device; | |
c56f5c03 D |
148 | struct thermal_attr *trip_temp_attrs; |
149 | struct thermal_attr *trip_type_attrs; | |
27365a6c | 150 | struct thermal_attr *trip_hyst_attrs; |
203d3d4a ZR |
151 | void *devdata; |
152 | int trips; | |
b1569e99 MG |
153 | int passive_delay; |
154 | int polling_delay; | |
601f3d42 | 155 | int temperature; |
b1569e99 | 156 | int last_temperature; |
908b9fb7 | 157 | int passive; |
03a971a2 | 158 | unsigned int forced_passive; |
5b275ce2 | 159 | const struct thermal_zone_device_ops *ops; |
2d374139 | 160 | struct list_head thermal_instances; |
203d3d4a | 161 | struct idr idr; |
2d374139 | 162 | struct mutex lock; /* protect thermal_instances list */ |
203d3d4a | 163 | struct list_head node; |
b1569e99 | 164 | struct delayed_work poll_queue; |
203d3d4a | 165 | }; |
4cb18728 D |
166 | |
167 | struct thermal_genl_event { | |
168 | u32 orig; | |
169 | enum events event; | |
170 | }; | |
203d3d4a | 171 | |
23064088 | 172 | /* Function declarations */ |
4b1bf587 | 173 | struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, |
1b7ddb84 | 174 | void *, const struct thermal_zone_device_ops *, int, int); |
203d3d4a ZR |
175 | void thermal_zone_device_unregister(struct thermal_zone_device *); |
176 | ||
177 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, | |
9d99842f ZR |
178 | struct thermal_cooling_device *, |
179 | unsigned long, unsigned long); | |
203d3d4a ZR |
180 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, |
181 | struct thermal_cooling_device *); | |
b1569e99 | 182 | void thermal_zone_device_update(struct thermal_zone_device *); |
23064088 | 183 | |
203d3d4a | 184 | struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, |
5b275ce2 | 185 | const struct thermal_cooling_device_ops *); |
203d3d4a | 186 | void thermal_cooling_device_unregister(struct thermal_cooling_device *); |
af06216a RW |
187 | |
188 | #ifdef CONFIG_NET | |
2d58d7ea | 189 | extern int thermal_generate_netlink_event(u32 orig, enum events event); |
af06216a | 190 | #else |
2d58d7ea | 191 | static inline int thermal_generate_netlink_event(u32 orig, enum events event) |
af06216a RW |
192 | { |
193 | return 0; | |
194 | } | |
195 | #endif | |
203d3d4a | 196 | |
a0dd25b2 | 197 | #endif /* __THERMAL_H__ */ |