include/linux/power_supply.h

   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_VOLTAGE_OCV,
 100         POWER_SUPPLY_PROP_CURRENT_MAX,
 101         POWER_SUPPLY_PROP_CURRENT_NOW,
 102         POWER_SUPPLY_PROP_CURRENT_AVG,
 103         POWER_SUPPLY_PROP_POWER_NOW,
 104         POWER_SUPPLY_PROP_POWER_AVG,
 105         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 106         POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
 107         POWER_SUPPLY_PROP_CHARGE_FULL,
 108         POWER_SUPPLY_PROP_CHARGE_EMPTY,
 109         POWER_SUPPLY_PROP_CHARGE_NOW,
 110         POWER_SUPPLY_PROP_CHARGE_AVG,
 111         POWER_SUPPLY_PROP_CHARGE_COUNTER,
 112         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 113         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 114         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 115         POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 116         POWER_SUPPLY_PROP_ENERGY_FULL,
 117         POWER_SUPPLY_PROP_ENERGY_EMPTY,
 118         POWER_SUPPLY_PROP_ENERGY_NOW,
 119         POWER_SUPPLY_PROP_ENERGY_AVG,
 120         POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
 121         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 122         POWER_SUPPLY_PROP_TEMP,
 123         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 124         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 125         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 126         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 127         POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 128         POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
 129         POWER_SUPPLY_PROP_SCOPE,
 130         /* Properties of type `const char *' */
 131         POWER_SUPPLY_PROP_MODEL_NAME,
 132         POWER_SUPPLY_PROP_MANUFACTURER,
 133         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 134 };
 135
 136 enum power_supply_type {
 137         POWER_SUPPLY_TYPE_UNKNOWN = 0,
 138         POWER_SUPPLY_TYPE_BATTERY,
 139         POWER_SUPPLY_TYPE_UPS,
 140         POWER_SUPPLY_TYPE_MAINS,
 141         POWER_SUPPLY_TYPE_USB,          /* Standard Downstream Port */
 142         POWER_SUPPLY_TYPE_USB_DCP,      /* Dedicated Charging Port */
 143         POWER_SUPPLY_TYPE_USB_CDP,      /* Charging Downstream Port */
 144         POWER_SUPPLY_TYPE_USB_ACA,      /* Accessory Charger Adapters */
 145 };
 146
 147 union power_supply_propval {
 148         int intval;
 149         const char *strval;
 150 };
 151
 152 struct power_supply {
 153         const char *name;
 154         enum power_supply_type type;
 155         enum power_supply_property *properties;
 156         size_t num_properties;
 157
 158         char **supplied_to;
 159         size_t num_supplicants;
 160
 161         int (*get_property)(struct power_supply *psy,
 162                             enum power_supply_property psp,
 163                             union power_supply_propval *val);
 164         int (*set_property)(struct power_supply *psy,
 165                             enum power_supply_property psp,
 166                             const union power_supply_propval *val);
 167         int (*property_is_writeable)(struct power_supply *psy,
 168                                      enum power_supply_property psp);
 169         void (*external_power_changed)(struct power_supply *psy);
 170         void (*set_charged)(struct power_supply *psy);
 171
 172         /* For APM emulation, think legacy userspace. */
 173         int use_for_apm;
 174
 175         /* private */
 176         struct device *dev;
 177         struct work_struct changed_work;
 178 #ifdef CONFIG_THERMAL
 179         struct thermal_zone_device *tzd;
 180 #endif
 181
 182 #ifdef CONFIG_LEDS_TRIGGERS
 183         struct led_trigger *charging_full_trig;
 184         char *charging_full_trig_name;
 185         struct led_trigger *charging_trig;
 186         char *charging_trig_name;
 187         struct led_trigger *full_trig;
 188         char *full_trig_name;
 189         struct led_trigger *online_trig;
 190         char *online_trig_name;
 191         struct led_trigger *charging_blink_full_solid_trig;
 192         char *charging_blink_full_solid_trig_name;
 193 #endif
 194 };
 195
 196 /*
 197  * This is recommended structure to specify static power supply parameters.
 198  * Generic one, parametrizable for different power supplies. Power supply
 199  * class itself does not use it, but that's what implementing most platform
 200  * drivers, should try reuse for consistency.
 201  */
 202
 203 struct power_supply_info {
 204         const char *name;
 205         int technology;
 206         int voltage_max_design;
 207         int voltage_min_design;
 208         int charge_full_design;
 209         int charge_empty_design;
 210         int energy_full_design;
 211         int energy_empty_design;
 212         int use_for_apm;
 213 };
 214
 215 extern struct power_supply *power_supply_get_by_name(char *name);
 216 extern void power_supply_changed(struct power_supply *psy);
 217 extern int power_supply_am_i_supplied(struct power_supply *psy);
 218 extern int power_supply_set_battery_charged(struct power_supply *psy);
 219
 220 #ifdef CONFIG_POWER_SUPPLY
 221 extern int power_supply_is_system_supplied(void);
 222 #else
 223 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 224 #endif
 225
 226 extern int power_supply_register(struct device *parent,
 227                                  struct power_supply *psy);
 228 extern void power_supply_unregister(struct power_supply *psy);
 229 extern int power_supply_powers(struct power_supply *psy, struct device *dev);
 230
 231 /* For APM emulation, think legacy userspace. */
 232 extern struct class *power_supply_class;
 233
 234 static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 235 {
 236         switch (psp) {
 237         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 238         case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
 239         case POWER_SUPPLY_PROP_CHARGE_FULL:
 240         case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 241         case POWER_SUPPLY_PROP_CHARGE_NOW:
 242         case POWER_SUPPLY_PROP_CHARGE_AVG:
 243         case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 244         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 245         case POWER_SUPPLY_PROP_CURRENT_MAX:
 246         case POWER_SUPPLY_PROP_CURRENT_NOW:
 247         case POWER_SUPPLY_PROP_CURRENT_AVG:
 248                 return 1;
 249         default:
 250                 break;
 251         }
 252
 253         return 0;
 254 }
 255
 256 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 257 {
 258         switch (psp) {
 259         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 260         case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
 261         case POWER_SUPPLY_PROP_ENERGY_FULL:
 262         case POWER_SUPPLY_PROP_ENERGY_EMPTY:
 263         case POWER_SUPPLY_PROP_ENERGY_NOW:
 264         case POWER_SUPPLY_PROP_ENERGY_AVG:
 265         case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 266         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 267         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 268         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 269         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 270         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 271         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 272         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 273         case POWER_SUPPLY_PROP_POWER_NOW:
 274                 return 1;
 275         default:
 276                 break;
 277         }
 278
 279         return 0;
 280 }
 281
 282 #endif /* __LINUX_POWER_SUPPLY_H__ */