summaryrefslogtreecommitdiffstats
path: root/include/linux/power/charger-manager.h
blob: c4fa907c8f148abb08657827850fdc093110dd43 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/*
 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
 * MyungJoo.Ham <myungjoo.ham@samsung.com>
 *
 * Charger Manager.
 * This framework enables to control and multiple chargers and to
 * monitor charging even in the context of suspend-to-RAM with
 * an interface combining the chargers.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
**/

#ifndef _CHARGER_MANAGER_H
#define _CHARGER_MANAGER_H

#include <linux/power_supply.h>
#include <linux/extcon.h>
#include <linux/alarmtimer.h>

enum data_source {
	CM_BATTERY_PRESENT,
	CM_NO_BATTERY,
	CM_FUEL_GAUGE,
	CM_CHARGER_STAT,
};

enum polling_modes {
	CM_POLL_DISABLE = 0,
	CM_POLL_ALWAYS,
	CM_POLL_EXTERNAL_POWER_ONLY,
	CM_POLL_CHARGING_ONLY,
};

enum cm_event_types {
	CM_EVENT_UNKNOWN = 0,
	CM_EVENT_BATT_FULL,
	CM_EVENT_BATT_IN,
	CM_EVENT_BATT_OUT,
	CM_EVENT_BATT_OVERHEAT,
	CM_EVENT_BATT_COLD,
	CM_EVENT_EXT_PWR_IN_OUT,
	CM_EVENT_CHG_START_STOP,
	CM_EVENT_OTHERS,
};

/**
 * struct charger_cable
 * @extcon_name: the name of extcon device.
 * @name: the name of charger cable(external connector).
 * @extcon_dev: the extcon device.
 * @wq: the workqueue to control charger according to the state of
 *	charger cable. If charger cable is attached, enable charger.
 *	But if charger cable is detached, disable charger.
 * @nb: the notifier block to receive changed state from EXTCON
 *	(External Connector) when charger cable is attached/detached.
 * @attached: the state of charger cable.
 *	true: the charger cable is attached
 *	false: the charger cable is detached
 * @charger: the instance of struct charger_regulator.
 * @cm: the Charger Manager representing the battery.
 */
struct charger_cable {
	const char *extcon_name;
	const char *name;

	/* The charger-manager use Extcon framework */
	struct extcon_specific_cable_nb extcon_dev;
	struct work_struct wq;
	struct notifier_block nb;

	/* The state of charger cable */
	bool attached;

	struct charger_regulator *charger;

	/*
	 * Set min/max current of regulator to protect over-current issue
	 * according to a kind of charger cable when cable is attached.
	 */
	int min_uA;
	int max_uA;

	struct charger_manager *cm;
};

/**
 * struct charger_regulator
 * @regulator_name: the name of regulator for using charger.
 * @consumer: the regulator consumer for the charger.
 * @externally_control:
 *	Set if the charger-manager cannot control charger,
 *	the charger will be maintained with disabled state.
 * @cables:
 *	the array of charger cables to enable/disable charger
 *	and set current limit according to constraint data of
 *	struct charger_cable if only charger cable included
 *	in the array of charger cables is attached/detached.
 * @num_cables: the number of charger cables.
 * @attr_g: Attribute group for the charger(regulator)
 * @attr_name: "name" sysfs entry
 * @attr_state: "state" sysfs entry
 * @attr_externally_control: "externally_control" sysfs entry
 * @attrs: Arrays pointing to attr_name/state/externally_control for attr_g
 */
struct charger_regulator {
	/* The name of regulator for charging */
	const char *regulator_name;
	struct regulator *consumer;

	/* charger never on when system is on */
	int externally_control;

	/*
	 * Store constraint information related to current limit,
	 * each cable have different condition for charging.
	 */
	struct charger_cable *cables;
	int num_cables;

	struct attribute_group attr_g;
	struct device_attribute attr_name;
	struct device_attribute attr_state;
	struct device_attribute attr_externally_control;
	struct attribute *attrs[4];

	struct charger_manager *cm;
};

/**
 * struct charger_desc
 * @psy_name: the name of power-supply-class for charger manager
 * @polling_mode:
 *	Determine which polling mode will be used
 * @fullbatt_vchkdrop_ms:
 * @fullbatt_vchkdrop_uV:
 *	Check voltage drop after the battery is fully charged.
 *	If it has dropped more than fullbatt_vchkdrop_uV after
 *	fullbatt_vchkdrop_ms, CM will restart charging.
 * @fullbatt_uV: voltage in microvolt
 *	If VBATT >= fullbatt_uV, it is assumed to be full.
 * @fullbatt_soc: state of Charge in %
 *	If state of Charge >= fullbatt_soc, it is assumed to be full.
 * @fullbatt_full_capacity: full capacity measure
 *	If full capacity of battery >= fullbatt_full_capacity,
 *	it is assumed to be full.
 * @polling_interval_ms: interval in millisecond at which
 *	charger manager will monitor battery health
 * @battery_present:
 *	Specify where information for existence of battery can be obtained
 * @psy_charger_stat: the names of power-supply for chargers
 * @num_charger_regulator: the number of entries in charger_regulators
 * @charger_regulators: array of charger regulators
 * @psy_fuel_gauge: the name of power-supply for fuel gauge
 * @thermal_zone : the name of thermal zone for battery
 * @temp_min : Minimum battery temperature for charging.
 * @temp_max : Maximum battery temperature for charging.
 * @temp_diff : Temperature difference to restart charging.
 * @measure_battery_temp:
 *	true: measure battery temperature
 *	false: measure ambient temperature
 * @charging_max_duration_ms: Maximum possible duration for charging
 *	If whole charging duration exceed 'charging_max_duration_ms',
 *	cm stop charging.
 * @discharging_max_duration_ms:
 *	Maximum possible duration for discharging with charger cable
 *	after full-batt. If discharging duration exceed 'discharging
 *	max_duration_ms', cm start charging.
 */
struct charger_desc {
	const char *psy_name;

	enum polling_modes polling_mode;
	unsigned int polling_interval_ms;

	unsigned int fullbatt_vchkdrop_ms;
	unsigned int fullbatt_vchkdrop_uV;
	unsigned int fullbatt_uV;
	unsigned int fullbatt_soc;
	unsigned int fullbatt_full_capacity;

	enum data_source battery_present;

	const char **psy_charger_stat;

	int num_charger_regulators;
	struct charger_regulator *charger_regulators;

	const char *psy_fuel_gauge;

	const char *thermal_zone;

	int temp_min;
	int temp_max;
	int temp_diff;

	bool measure_battery_temp;

	u32 charging_max_duration_ms;
	u32 discharging_max_duration_ms;
};

#define PSY_NAME_MAX	30

/**
 * struct charger_manager
 * @entry: entry for list
 * @dev: device pointer
 * @desc: instance of charger_desc
 * @fuel_gauge: power_supply for fuel gauge
 * @charger_stat: array of power_supply for chargers
 * @tzd_batt : thermal zone device for battery
 * @charger_enabled: the state of charger
 * @fullbatt_vchk_jiffies_at:
 *	jiffies at the time full battery check will occur.
 * @fullbatt_vchk_work: work queue for full battery check
 * @emergency_stop:
 *	When setting true, stop charging
 * @psy_name_buf: the name of power-supply-class for charger manager
 * @charger_psy: power_supply for charger manager
 * @status_save_ext_pwr_inserted:
 *	saved status of external power before entering suspend-to-RAM
 * @status_save_batt:
 *	saved status of battery before entering suspend-to-RAM
 * @charging_start_time: saved start time of enabling charging
 * @charging_end_time: saved end time of disabling charging
 */
struct charger_manager {
	struct list_head entry;
	struct device *dev;
	struct charger_desc *desc;

#ifdef CONFIG_THERMAL
	struct thermal_zone_device *tzd_batt;
#endif
	bool charger_enabled;

	unsigned long fullbatt_vchk_jiffies_at;
	struct delayed_work fullbatt_vchk_work;

	int emergency_stop;

	char psy_name_buf[PSY_NAME_MAX + 1];
	struct power_supply_desc charger_psy_desc;
	struct power_supply *charger_psy;

	u64 charging_start_time;
	u64 charging_end_time;
};

#ifdef CONFIG_CHARGER_MANAGER
extern void cm_notify_event(struct power_supply *psy,
				enum cm_event_types type, char *msg);
#else
static inline void cm_notify_event(struct power_supply *psy,
				enum cm_event_types type, char *msg) { }
#endif
#endif /* _CHARGER_MANAGER_H */