LXR linux/include/linux/power

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