1 /* 2 * thermal.h ($Revision: 0 $) 3 * 4 * Copyright (C) 2008 Intel Corp 5 * Copyright (C) 2008 Zhang Rui <[email protected]> 6 * Copyright (C) 2008 Sujith Thomas <[email protected]> 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> 30 #include <linux/workqueue.h> 31 32 struct thermal_zone_device; 33 struct thermal_cooling_device; 34 35 enum thermal_device_mode { 36 THERMAL_DEVICE_DISABLED = 0, 37 THERMAL_DEVICE_ENABLED, 38 }; 39 40 enum thermal_trip_type { 41 THERMAL_TRIP_ACTIVE = 0, 42 THERMAL_TRIP_PASSIVE, 43 THERMAL_TRIP_HOT, 44 THERMAL_TRIP_CRITICAL, 45 }; 46 47 struct thermal_zone_device_ops { 48 int (*bind) (struct thermal_zone_device *, 49 struct thermal_cooling_device *); 50 int (*unbind) (struct thermal_zone_device *, 51 struct thermal_cooling_device *); 52 int (*get_temp) (struct thermal_zone_device *, unsigned long *); 53 int (*get_mode) (struct thermal_zone_device *, 54 enum thermal_device_mode *); 55 int (*set_mode) (struct thermal_zone_device *, 56 enum thermal_device_mode); 57 int (*get_trip_type) (struct thermal_zone_device *, int, 58 enum thermal_trip_type *); 59 int (*get_trip_temp) (struct thermal_zone_device *, int, 60 unsigned long *); 61 int (*set_trip_temp) (struct thermal_zone_device *, int, 62 unsigned long); 63 int (*get_trip_hyst) (struct thermal_zone_device *, int, 64 unsigned long *); 65 int (*set_trip_hyst) (struct thermal_zone_device *, int, 66 unsigned long); 67 int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *); 68 int (*notify) (struct thermal_zone_device *, int, 69 enum thermal_trip_type); 70 }; 71 72 struct thermal_cooling_device_ops { 73 int (*get_max_state) (struct thermal_cooling_device *, unsigned long *); 74 int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *); 75 int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); 76 }; 77 78 #define THERMAL_TRIPS_NONE -1 79 #define THERMAL_MAX_TRIPS 12 80 #define THERMAL_NAME_LENGTH 20 81 struct thermal_cooling_device { 82 int id; 83 char type[THERMAL_NAME_LENGTH]; 84 struct device device; 85 void *devdata; 86 const struct thermal_cooling_device_ops *ops; 87 struct list_head node; 88 }; 89 90 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \ 91 ((long)t-2732+5)/10 : ((long)t-2732-5)/10) 92 #define CELSIUS_TO_KELVIN(t) ((t)*10+2732) 93 94 struct thermal_attr { 95 struct device_attribute attr; 96 char name[THERMAL_NAME_LENGTH]; 97 }; 98 99 struct thermal_zone_device { 100 int id; 101 char type[THERMAL_NAME_LENGTH]; 102 struct device device; 103 struct thermal_attr *trip_temp_attrs; 104 struct thermal_attr *trip_type_attrs; 105 struct thermal_attr *trip_hyst_attrs; 106 void *devdata; 107 int trips; 108 int tc1; 109 int tc2; 110 int passive_delay; 111 int polling_delay; 112 int last_temperature; 113 bool passive; 114 unsigned int forced_passive; 115 const struct thermal_zone_device_ops *ops; 116 struct list_head cooling_devices; 117 struct idr idr; 118 struct mutex lock; /* protect cooling devices list */ 119 struct list_head node; 120 struct delayed_work poll_queue; 121 }; 122 /* Adding event notification support elements */ 123 #define THERMAL_GENL_FAMILY_NAME "thermal_event" 124 #define THERMAL_GENL_VERSION 0x01 125 #define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group" 126 127 enum events { 128 THERMAL_AUX0, 129 THERMAL_AUX1, 130 THERMAL_CRITICAL, 131 THERMAL_DEV_FAULT, 132 }; 133 134 struct thermal_genl_event { 135 u32 orig; 136 enum events event; 137 }; 138 /* attributes of thermal_genl_family */ 139 enum { 140 THERMAL_GENL_ATTR_UNSPEC, 141 THERMAL_GENL_ATTR_EVENT, 142 __THERMAL_GENL_ATTR_MAX, 143 }; 144 #define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1) 145 146 /* commands supported by the thermal_genl_family */ 147 enum { 148 THERMAL_GENL_CMD_UNSPEC, 149 THERMAL_GENL_CMD_EVENT, 150 __THERMAL_GENL_CMD_MAX, 151 }; 152 #define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1) 153 154 struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, 155 void *, const struct thermal_zone_device_ops *, int tc1, 156 int tc2, int passive_freq, int polling_freq); 157 void thermal_zone_device_unregister(struct thermal_zone_device *); 158 159 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, 160 struct thermal_cooling_device *); 161 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, 162 struct thermal_cooling_device *); 163 void thermal_zone_device_update(struct thermal_zone_device *); 164 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, 165 const struct thermal_cooling_device_ops *); 166 void thermal_cooling_device_unregister(struct thermal_cooling_device *); 167 168 #ifdef CONFIG_NET 169 extern int thermal_generate_netlink_event(u32 orig, enum events event); 170 #else 171 static inline int thermal_generate_netlink_event(u32 orig, enum events event) 172 { 173 return 0; 174 } 175 #endif 176 177 #endif /* __THERMAL_H__ */ 178