1 /* 2 * Universal power supply monitor class 3 * 4 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> 5 * Copyright © 2004 Szabolcs Gyurko 6 * Copyright © 2003 Ian Molton <spyro@f2s.com> 7 * 8 * Modified: 2004, Oct Szabolcs Gyurko 9 * 10 * You may use this code as per GPL version 2 11 */ 12 13 #ifndef __LINUX_POWER_SUPPLY_H__ 14 #define __LINUX_POWER_SUPPLY_H__ 15 16 #include <linux/workqueue.h> 17 #include <linux/leds.h> 18 19 struct device; 20 21 /* 22 * All voltages, currents, charges, energies, time and temperatures in uV, 23 * µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise 24 * stated. It's driver's job to convert its raw values to units in which 25 * this class operates. 26 */ 27 28 /* 29 * For systems where the charger determines the maximum battery capacity 30 * the min and max fields should be used to present these values to user 31 * space. Unused/unknown fields will not appear in sysfs. 32 */ 33 34 enum { 35 POWER_SUPPLY_STATUS_UNKNOWN = 0, 36 POWER_SUPPLY_STATUS_CHARGING, 37 POWER_SUPPLY_STATUS_DISCHARGING, 38 POWER_SUPPLY_STATUS_NOT_CHARGING, 39 POWER_SUPPLY_STATUS_FULL, 40 }; 41 42 enum { 43 POWER_SUPPLY_CHARGE_TYPE_UNKNOWN = 0, 44 POWER_SUPPLY_CHARGE_TYPE_NONE, 45 POWER_SUPPLY_CHARGE_TYPE_TRICKLE, 46 POWER_SUPPLY_CHARGE_TYPE_FAST, 47 }; 48 49 enum { 50 POWER_SUPPLY_HEALTH_UNKNOWN = 0, 51 POWER_SUPPLY_HEALTH_GOOD, 52 POWER_SUPPLY_HEALTH_OVERHEAT, 53 POWER_SUPPLY_HEALTH_DEAD, 54 POWER_SUPPLY_HEALTH_OVERVOLTAGE, 55 POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, 56 POWER_SUPPLY_HEALTH_COLD, 57 }; 58 59 enum { 60 POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0, 61 POWER_SUPPLY_TECHNOLOGY_NiMH, 62 POWER_SUPPLY_TECHNOLOGY_LION, 63 POWER_SUPPLY_TECHNOLOGY_LIPO, 64 POWER_SUPPLY_TECHNOLOGY_LiFe, 65 POWER_SUPPLY_TECHNOLOGY_NiCd, 66 POWER_SUPPLY_TECHNOLOGY_LiMn, 67 }; 68 69 enum { 70 POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0, 71 POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL, 72 POWER_SUPPLY_CAPACITY_LEVEL_LOW, 73 POWER_SUPPLY_CAPACITY_LEVEL_NORMAL, 74 POWER_SUPPLY_CAPACITY_LEVEL_HIGH, 75 POWER_SUPPLY_CAPACITY_LEVEL_FULL, 76 }; 77 78 enum { 79 POWER_SUPPLY_SCOPE_UNKNOWN = 0, 80 POWER_SUPPLY_SCOPE_SYSTEM, 81 POWER_SUPPLY_SCOPE_DEVICE, 82 }; 83 84 enum power_supply_property { 85 /* Properties of type `int' */ 86 POWER_SUPPLY_PROP_STATUS = 0, 87 POWER_SUPPLY_PROP_CHARGE_TYPE, 88 POWER_SUPPLY_PROP_HEALTH, 89 POWER_SUPPLY_PROP_PRESENT, 90 POWER_SUPPLY_PROP_ONLINE, 91 POWER_SUPPLY_PROP_TECHNOLOGY, 92 POWER_SUPPLY_PROP_CYCLE_COUNT, 93 POWER_SUPPLY_PROP_VOLTAGE_MAX, 94 POWER_SUPPLY_PROP_VOLTAGE_MIN, 95 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 96 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 97 POWER_SUPPLY_PROP_VOLTAGE_NOW, 98 POWER_SUPPLY_PROP_VOLTAGE_AVG, 99 POWER_SUPPLY_PROP_CURRENT_MAX, 100 POWER_SUPPLY_PROP_CURRENT_NOW, 101 POWER_SUPPLY_PROP_CURRENT_AVG, 102 POWER_SUPPLY_PROP_POWER_NOW, 103 POWER_SUPPLY_PROP_POWER_AVG, 104 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 105 POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN, 106 POWER_SUPPLY_PROP_CHARGE_FULL, 107 POWER_SUPPLY_PROP_CHARGE_EMPTY, 108 POWER_SUPPLY_PROP_CHARGE_NOW, 109 POWER_SUPPLY_PROP_CHARGE_AVG, 110 POWER_SUPPLY_PROP_CHARGE_COUNTER, 111 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 112 POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN, 113 POWER_SUPPLY_PROP_ENERGY_FULL, 114 POWER_SUPPLY_PROP_ENERGY_EMPTY, 115 POWER_SUPPLY_PROP_ENERGY_NOW, 116 POWER_SUPPLY_PROP_ENERGY_AVG, 117 POWER_SUPPLY_PROP_CAPACITY, /* in percents! */ 118 POWER_SUPPLY_PROP_CAPACITY_LEVEL, 119 POWER_SUPPLY_PROP_TEMP, 120 POWER_SUPPLY_PROP_TEMP_AMBIENT, 121 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, 122 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 123 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, 124 POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 125 POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */ 126 POWER_SUPPLY_PROP_SCOPE, 127 /* Properties of type `const char *' */ 128 POWER_SUPPLY_PROP_MODEL_NAME, 129 POWER_SUPPLY_PROP_MANUFACTURER, 130 POWER_SUPPLY_PROP_SERIAL_NUMBER, 131 }; 132 133 enum power_supply_type { 134 POWER_SUPPLY_TYPE_UNKNOWN = 0, 135 POWER_SUPPLY_TYPE_BATTERY, 136 POWER_SUPPLY_TYPE_UPS, 137 POWER_SUPPLY_TYPE_MAINS, 138 POWER_SUPPLY_TYPE_USB, /* Standard Downstream Port */ 139 POWER_SUPPLY_TYPE_USB_DCP, /* Dedicated Charging Port */ 140 POWER_SUPPLY_TYPE_USB_CDP, /* Charging Downstream Port */ 141 POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */ 142 }; 143 144 union power_supply_propval { 145 int intval; 146 const char *strval; 147 }; 148 149 struct power_supply { 150 const char *name; 151 enum power_supply_type type; 152 enum power_supply_property *properties; 153 size_t num_properties; 154 155 char **supplied_to; 156 size_t num_supplicants; 157 158 int (*get_property)(struct power_supply *psy, 159 enum power_supply_property psp, 160 union power_supply_propval *val); 161 int (*set_property)(struct power_supply *psy, 162 enum power_supply_property psp, 163 const union power_supply_propval *val); 164 int (*property_is_writeable)(struct power_supply *psy, 165 enum power_supply_property psp); 166 void (*external_power_changed)(struct power_supply *psy); 167 void (*set_charged)(struct power_supply *psy); 168 169 /* For APM emulation, think legacy userspace. */ 170 int use_for_apm; 171 172 /* private */ 173 struct device *dev; 174 struct work_struct changed_work; 175 176 #ifdef CONFIG_LEDS_TRIGGERS 177 struct led_trigger *charging_full_trig; 178 char *charging_full_trig_name; 179 struct led_trigger *charging_trig; 180 char *charging_trig_name; 181 struct led_trigger *full_trig; 182 char *full_trig_name; 183 struct led_trigger *online_trig; 184 char *online_trig_name; 185 struct led_trigger *charging_blink_full_solid_trig; 186 char *charging_blink_full_solid_trig_name; 187 #endif 188 }; 189 190 /* 191 * This is recommended structure to specify static power supply parameters. 192 * Generic one, parametrizable for different power supplies. Power supply 193 * class itself does not use it, but that's what implementing most platform 194 * drivers, should try reuse for consistency. 195 */ 196 197 struct power_supply_info { 198 const char *name; 199 int technology; 200 int voltage_max_design; 201 int voltage_min_design; 202 int charge_full_design; 203 int charge_empty_design; 204 int energy_full_design; 205 int energy_empty_design; 206 int use_for_apm; 207 }; 208 209 extern struct power_supply *power_supply_get_by_name(char *name); 210 extern void power_supply_changed(struct power_supply *psy); 211 extern int power_supply_am_i_supplied(struct power_supply *psy); 212 extern int power_supply_set_battery_charged(struct power_supply *psy); 213 214 #if defined(CONFIG_POWER_SUPPLY) || defined(CONFIG_POWER_SUPPLY_MODULE) 215 extern int power_supply_is_system_supplied(void); 216 #else 217 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; } 218 #endif 219 220 extern int power_supply_register(struct device *parent, 221 struct power_supply *psy); 222 extern void power_supply_unregister(struct power_supply *psy); 223 extern int power_supply_powers(struct power_supply *psy, struct device *dev); 224 225 /* For APM emulation, think legacy userspace. */ 226 extern struct class *power_supply_class; 227 228 static inline bool power_supply_is_amp_property(enum power_supply_property psp) 229 { 230 switch (psp) { 231 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 232 case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: 233 case POWER_SUPPLY_PROP_CHARGE_FULL: 234 case POWER_SUPPLY_PROP_CHARGE_EMPTY: 235 case POWER_SUPPLY_PROP_CHARGE_NOW: 236 case POWER_SUPPLY_PROP_CHARGE_AVG: 237 case POWER_SUPPLY_PROP_CHARGE_COUNTER: 238 case POWER_SUPPLY_PROP_CURRENT_MAX: 239 case POWER_SUPPLY_PROP_CURRENT_NOW: 240 case POWER_SUPPLY_PROP_CURRENT_AVG: 241 return 1; 242 default: 243 break; 244 } 245 246 return 0; 247 } 248 249 static inline bool power_supply_is_watt_property(enum power_supply_property psp) 250 { 251 switch (psp) { 252 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 253 case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN: 254 case POWER_SUPPLY_PROP_ENERGY_FULL: 255 case POWER_SUPPLY_PROP_ENERGY_EMPTY: 256 case POWER_SUPPLY_PROP_ENERGY_NOW: 257 case POWER_SUPPLY_PROP_ENERGY_AVG: 258 case POWER_SUPPLY_PROP_VOLTAGE_MAX: 259 case POWER_SUPPLY_PROP_VOLTAGE_MIN: 260 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 261 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 262 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 263 case POWER_SUPPLY_PROP_VOLTAGE_AVG: 264 case POWER_SUPPLY_PROP_POWER_NOW: 265 return 1; 266 default: 267 break; 268 } 269 270 return 0; 271 } 272 273 #endif /* __LINUX_POWER_SUPPLY_H__ */ 274