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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
19struct 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
34enum {
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
42enum {
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
49enum {
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
59enum {
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
69enum {
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
78enum {
79 POWER_SUPPLY_SCOPE_UNKNOWN = 0,
80 POWER_SUPPLY_SCOPE_SYSTEM,
81 POWER_SUPPLY_SCOPE_DEVICE,
82};
83
84enum 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_ENERGY_FULL_DESIGN,
113 POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
114 POWER_SUPPLY_PROP_ENERGY_FULL,
115 POWER_SUPPLY_PROP_ENERGY_EMPTY,
116 POWER_SUPPLY_PROP_ENERGY_NOW,
117 POWER_SUPPLY_PROP_ENERGY_AVG,
118 POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
119 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
120 POWER_SUPPLY_PROP_TEMP,
121 POWER_SUPPLY_PROP_TEMP_AMBIENT,
122 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
123 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
124 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
125 POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
126 POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
127 POWER_SUPPLY_PROP_SCOPE,
128 /* Properties of type `const char *' */
129 POWER_SUPPLY_PROP_MODEL_NAME,
130 POWER_SUPPLY_PROP_MANUFACTURER,
131 POWER_SUPPLY_PROP_SERIAL_NUMBER,
132};
133
134enum power_supply_type {
135 POWER_SUPPLY_TYPE_UNKNOWN = 0,
136 POWER_SUPPLY_TYPE_BATTERY,
137 POWER_SUPPLY_TYPE_UPS,
138 POWER_SUPPLY_TYPE_MAINS,
139 POWER_SUPPLY_TYPE_USB, /* Standard Downstream Port */
140 POWER_SUPPLY_TYPE_USB_DCP, /* Dedicated Charging Port */
141 POWER_SUPPLY_TYPE_USB_CDP, /* Charging Downstream Port */
142 POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */
143};
144
145union power_supply_propval {
146 int intval;
147 const char *strval;
148};
149
150struct power_supply {
151 const char *name;
152 enum power_supply_type type;
153 enum power_supply_property *properties;
154 size_t num_properties;
155
156 char **supplied_to;
157 size_t num_supplicants;
158
159 int (*get_property)(struct power_supply *psy,
160 enum power_supply_property psp,
161 union power_supply_propval *val);
162 int (*set_property)(struct power_supply *psy,
163 enum power_supply_property psp,
164 const union power_supply_propval *val);
165 int (*property_is_writeable)(struct power_supply *psy,
166 enum power_supply_property psp);
167 void (*external_power_changed)(struct power_supply *psy);
168 void (*set_charged)(struct power_supply *psy);
169
170 /* For APM emulation, think legacy userspace. */
171 int use_for_apm;
172
173 /* private */
174 struct device *dev;
175 struct work_struct changed_work;
176
177#ifdef CONFIG_LEDS_TRIGGERS
178 struct led_trigger *charging_full_trig;
179 char *charging_full_trig_name;
180 struct led_trigger *charging_trig;
181 char *charging_trig_name;
182 struct led_trigger *full_trig;
183 char *full_trig_name;
184 struct led_trigger *online_trig;
185 char *online_trig_name;
186 struct led_trigger *charging_blink_full_solid_trig;
187 char *charging_blink_full_solid_trig_name;
188#endif
189};
190
191/*
192 * This is recommended structure to specify static power supply parameters.
193 * Generic one, parametrizable for different power supplies. Power supply
194 * class itself does not use it, but that's what implementing most platform
195 * drivers, should try reuse for consistency.
196 */
197
198struct power_supply_info {
199 const char *name;
200 int technology;
201 int voltage_max_design;
202 int voltage_min_design;
203 int charge_full_design;
204 int charge_empty_design;
205 int energy_full_design;
206 int energy_empty_design;
207 int use_for_apm;
208};
209
210extern struct power_supply *power_supply_get_by_name(char *name);
211extern void power_supply_changed(struct power_supply *psy);
212extern int power_supply_am_i_supplied(struct power_supply *psy);
213extern int power_supply_set_battery_charged(struct power_supply *psy);
214
215#ifdef CONFIG_POWER_SUPPLY
216extern int power_supply_is_system_supplied(void);
217#else
218static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
219#endif
220
221extern int power_supply_register(struct device *parent,
222 struct power_supply *psy);
223extern void power_supply_unregister(struct power_supply *psy);
224extern int power_supply_powers(struct power_supply *psy, struct device *dev);
225
226/* For APM emulation, think legacy userspace. */
227extern struct class *power_supply_class;
228
229static inline bool power_supply_is_amp_property(enum power_supply_property psp)
230{
231 switch (psp) {
232 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
233 case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
234 case POWER_SUPPLY_PROP_CHARGE_FULL:
235 case POWER_SUPPLY_PROP_CHARGE_EMPTY:
236 case POWER_SUPPLY_PROP_CHARGE_NOW:
237 case POWER_SUPPLY_PROP_CHARGE_AVG:
238 case POWER_SUPPLY_PROP_CHARGE_COUNTER:
239 case POWER_SUPPLY_PROP_CURRENT_MAX:
240 case POWER_SUPPLY_PROP_CURRENT_NOW:
241 case POWER_SUPPLY_PROP_CURRENT_AVG:
242 return 1;
243 default:
244 break;
245 }
246
247 return 0;
248}
249
250static inline bool power_supply_is_watt_property(enum power_supply_property psp)
251{
252 switch (psp) {
253 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
254 case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
255 case POWER_SUPPLY_PROP_ENERGY_FULL:
256 case POWER_SUPPLY_PROP_ENERGY_EMPTY:
257 case POWER_SUPPLY_PROP_ENERGY_NOW:
258 case POWER_SUPPLY_PROP_ENERGY_AVG:
259 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
260 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
261 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
262 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
263 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
264 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
265 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
266 case POWER_SUPPLY_PROP_POWER_NOW:
267 return 1;
268 default:
269 break;
270 }
271
272 return 0;
273}
274
275#endif /* __LINUX_POWER_SUPPLY_H__ */