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Diffstat (limited to 'kernel/include/linux/power/charger-manager.h')
| -rw-r--r-- | kernel/include/linux/power/charger-manager.h | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/kernel/include/linux/power/charger-manager.h b/kernel/include/linux/power/charger-manager.h new file mode 100644 index 000000000..eadf28cb2 --- /dev/null +++ b/kernel/include/linux/power/charger-manager.h @@ -0,0 +1,259 @@ +/* + * 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 Exton 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 constratint 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 existance 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 diffential 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 */ |