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_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__ */