diff options
Diffstat (limited to 'drivers/power/charger-manager.c')
| -rw-r--r-- | drivers/power/charger-manager.c | 1479 |
1 files changed, 1262 insertions, 217 deletions
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c index 88fd9710bda..9e4dab46eef 100644 --- a/drivers/power/charger-manager.c +++ b/drivers/power/charger-manager.c @@ -12,6 +12,8 @@ * published by the Free Software Foundation. **/ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/io.h> #include <linux/module.h> #include <linux/irq.h> @@ -22,6 +24,28 @@ #include <linux/platform_device.h> #include <linux/power/charger-manager.h> #include <linux/regulator/consumer.h> +#include <linux/sysfs.h> +#include <linux/of.h> +#include <linux/thermal.h> + +/* + * Default termperature threshold for charging. + * Every temperature units are in tenth of centigrade. + */ +#define CM_DEFAULT_RECHARGE_TEMP_DIFF 50 +#define CM_DEFAULT_CHARGE_TEMP_MAX 500 + +static const char * const default_event_names[] = { + [CM_EVENT_UNKNOWN] = "Unknown", + [CM_EVENT_BATT_FULL] = "Battery Full", + [CM_EVENT_BATT_IN] = "Battery Inserted", + [CM_EVENT_BATT_OUT] = "Battery Pulled Out", + [CM_EVENT_BATT_OVERHEAT] = "Battery Overheat", + [CM_EVENT_BATT_COLD] = "Battery Cold", + [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach", + [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop", + [CM_EVENT_OTHERS] = "Other battery events" +}; /* * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for @@ -57,6 +81,12 @@ static bool cm_suspended; static bool cm_rtc_set; static unsigned long cm_suspend_duration_ms; +/* About normal (not suspended) monitoring */ +static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */ +static unsigned long next_polling; /* Next appointed polling time */ +static struct workqueue_struct *cm_wq; /* init at driver add */ +static struct delayed_work cm_monitor_work; /* init at driver add */ + /* Global charger-manager description */ static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ @@ -71,6 +101,11 @@ static bool is_batt_present(struct charger_manager *cm) int i, ret; switch (cm->desc->battery_present) { + case CM_BATTERY_PRESENT: + present = true; + break; + case CM_NO_BATTERY: + break; case CM_FUEL_GAUGE: ret = cm->fuel_gauge->get_property(cm->fuel_gauge, POWER_SUPPLY_PROP_PRESENT, &val); @@ -134,12 +169,11 @@ static int get_batt_uV(struct charger_manager *cm, int *uV) union power_supply_propval val; int ret; - if (cm->fuel_gauge) - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); - else + if (!cm->fuel_gauge) return -ENODEV; + ret = cm->fuel_gauge->get_property(cm->fuel_gauge, + POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); if (ret) return ret; @@ -174,8 +208,8 @@ static bool is_charging(struct charger_manager *cm) cm->charger_stat[i], POWER_SUPPLY_PROP_ONLINE, &val); if (ret) { - dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n", - cm->desc->psy_charger_stat[i]); + dev_warn(cm->dev, "Cannot read ONLINE value from %s\n", + cm->desc->psy_charger_stat[i]); continue; } if (val.intval == 0) @@ -189,8 +223,8 @@ static bool is_charging(struct charger_manager *cm) cm->charger_stat[i], POWER_SUPPLY_PROP_STATUS, &val); if (ret) { - dev_warn(cm->dev, "Cannot read STATUS value from %s.\n", - cm->desc->psy_charger_stat[i]); + dev_warn(cm->dev, "Cannot read STATUS value from %s\n", + cm->desc->psy_charger_stat[i]); continue; } if (val.intval == POWER_SUPPLY_STATUS_FULL || @@ -207,6 +241,51 @@ static bool is_charging(struct charger_manager *cm) } /** + * is_full_charged - Returns true if the battery is fully charged. + * @cm: the Charger Manager representing the battery. + */ +static bool is_full_charged(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + union power_supply_propval val; + int ret = 0; + int uV; + + /* If there is no battery, it cannot be charged */ + if (!is_batt_present(cm)) + return false; + + if (cm->fuel_gauge && desc->fullbatt_full_capacity > 0) { + val.intval = 0; + + /* Not full if capacity of fuel gauge isn't full */ + ret = cm->fuel_gauge->get_property(cm->fuel_gauge, + POWER_SUPPLY_PROP_CHARGE_FULL, &val); + if (!ret && val.intval > desc->fullbatt_full_capacity) + return true; + } + + /* Full, if it's over the fullbatt voltage */ + if (desc->fullbatt_uV > 0) { + ret = get_batt_uV(cm, &uV); + if (!ret && uV >= desc->fullbatt_uV) + return true; + } + + /* Full, if the capacity is more than fullbatt_soc */ + if (cm->fuel_gauge && desc->fullbatt_soc > 0) { + val.intval = 0; + + ret = cm->fuel_gauge->get_property(cm->fuel_gauge, + POWER_SUPPLY_PROP_CAPACITY, &val); + if (!ret && val.intval >= desc->fullbatt_soc) + return true; + } + + return false; +} + +/** * is_polling_required - Return true if need to continue polling for this CM. * @cm: the Charger Manager representing the battery. */ @@ -223,7 +302,7 @@ static bool is_polling_required(struct charger_manager *cm) return is_charging(cm); default: dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", - cm->desc->polling_mode); + cm->desc->polling_mode); } return false; @@ -245,32 +324,60 @@ static int try_charger_enable(struct charger_manager *cm, bool enable) struct charger_desc *desc = cm->desc; /* Ignore if it's redundent command */ - if (enable && cm->charger_enabled) - return 0; - if (!enable && !cm->charger_enabled) + if (enable == cm->charger_enabled) return 0; if (enable) { if (cm->emergency_stop) return -EAGAIN; - err = regulator_bulk_enable(desc->num_charger_regulators, - desc->charger_regulators); + + /* + * Save start time of charging to limit + * maximum possible charging time. + */ + cm->charging_start_time = ktime_to_ms(ktime_get()); + cm->charging_end_time = 0; + + for (i = 0 ; i < desc->num_charger_regulators ; i++) { + if (desc->charger_regulators[i].externally_control) + continue; + + err = regulator_enable(desc->charger_regulators[i].consumer); + if (err < 0) { + dev_warn(cm->dev, "Cannot enable %s regulator\n", + desc->charger_regulators[i].regulator_name); + } + } } else { /* + * Save end time of charging to maintain fully charged state + * of battery after full-batt. + */ + cm->charging_start_time = 0; + cm->charging_end_time = ktime_to_ms(ktime_get()); + + for (i = 0 ; i < desc->num_charger_regulators ; i++) { + if (desc->charger_regulators[i].externally_control) + continue; + + err = regulator_disable(desc->charger_regulators[i].consumer); + if (err < 0) { + dev_warn(cm->dev, "Cannot disable %s regulator\n", + desc->charger_regulators[i].regulator_name); + } + } + + /* * Abnormal battery state - Stop charging forcibly, * even if charger was enabled at the other places */ - err = regulator_bulk_disable(desc->num_charger_regulators, - desc->charger_regulators); - for (i = 0; i < desc->num_charger_regulators; i++) { if (regulator_is_enabled( desc->charger_regulators[i].consumer)) { regulator_force_disable( desc->charger_regulators[i].consumer); - dev_warn(cm->dev, - "Disable regulator(%s) forcibly.\n", - desc->charger_regulators[i].supply); + dev_warn(cm->dev, "Disable regulator(%s) forcibly\n", + desc->charger_regulators[i].regulator_name); } } } @@ -282,6 +389,26 @@ static int try_charger_enable(struct charger_manager *cm, bool enable) } /** + * try_charger_restart - Restart charging. + * @cm: the Charger Manager representing the battery. + * + * Restart charging by turning off and on the charger. + */ +static int try_charger_restart(struct charger_manager *cm) +{ + int err; + + if (cm->emergency_stop) + return -EAGAIN; + + err = try_charger_enable(cm, false); + if (err) + return err; + + return try_charger_enable(cm, true); +} + +/** * uevent_notify - Let users know something has changed. * @cm: the Charger Manager representing the battery. * @event: the event string. @@ -309,9 +436,7 @@ static void uevent_notify(struct charger_manager *cm, const char *event) if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) return; /* Duplicated. */ - else - strncpy(env_str_save, event, UEVENT_BUF_SIZE); - + strncpy(env_str_save, event, UEVENT_BUF_SIZE); return; } @@ -335,7 +460,149 @@ static void uevent_notify(struct charger_manager *cm, const char *event) strncpy(env_str, event, UEVENT_BUF_SIZE); kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); - dev_info(cm->dev, event); + dev_info(cm->dev, "%s\n", event); +} + +/** + * fullbatt_vchk - Check voltage drop some times after "FULL" event. + * @work: the work_struct appointing the function + * + * If a user has designated "fullbatt_vchkdrop_ms/uV" values with + * charger_desc, Charger Manager checks voltage drop after the battery + * "FULL" event. It checks whether the voltage has dropped more than + * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms. + */ +static void fullbatt_vchk(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct charger_manager *cm = container_of(dwork, + struct charger_manager, fullbatt_vchk_work); + struct charger_desc *desc = cm->desc; + int batt_uV, err, diff; + + /* remove the appointment for fullbatt_vchk */ + cm->fullbatt_vchk_jiffies_at = 0; + + if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) + return; + + err = get_batt_uV(cm, &batt_uV); + if (err) { + dev_err(cm->dev, "%s: get_batt_uV error(%d)\n", __func__, err); + return; + } + + diff = desc->fullbatt_uV - batt_uV; + if (diff < 0) + return; + + dev_info(cm->dev, "VBATT dropped %duV after full-batt\n", diff); + + if (diff > desc->fullbatt_vchkdrop_uV) { + try_charger_restart(cm); + uevent_notify(cm, "Recharging"); + } +} + +/** + * check_charging_duration - Monitor charging/discharging duration + * @cm: the Charger Manager representing the battery. + * + * If whole charging duration exceed 'charging_max_duration_ms', + * cm stop charging to prevent overcharge/overheat. If discharging + * duration exceed 'discharging _max_duration_ms', charger cable is + * attached, after full-batt, cm start charging to maintain fully + * charged state for battery. + */ +static int check_charging_duration(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + u64 curr = ktime_to_ms(ktime_get()); + u64 duration; + int ret = false; + + if (!desc->charging_max_duration_ms && + !desc->discharging_max_duration_ms) + return ret; + + if (cm->charger_enabled) { + duration = curr - cm->charging_start_time; + + if (duration > desc->charging_max_duration_ms) { + dev_info(cm->dev, "Charging duration exceed %ums\n", + desc->charging_max_duration_ms); + uevent_notify(cm, "Discharging"); + try_charger_enable(cm, false); + ret = true; + } + } else if (is_ext_pwr_online(cm) && !cm->charger_enabled) { + duration = curr - cm->charging_end_time; + + if (duration > desc->charging_max_duration_ms && + is_ext_pwr_online(cm)) { + dev_info(cm->dev, "Discharging duration exceed %ums\n", + desc->discharging_max_duration_ms); + uevent_notify(cm, "Recharging"); + try_charger_enable(cm, true); + ret = true; + } + } + + return ret; +} + +static int cm_get_battery_temperature(struct charger_manager *cm, + int *temp) +{ + int ret; + + if (!cm->desc->measure_battery_temp) + return -ENODEV; + +#ifdef CONFIG_THERMAL + ret = thermal_zone_get_temp(cm->tzd_batt, (unsigned long *)temp); + if (!ret) + /* Calibrate temperature unit */ + *temp /= 100; +#else + ret = cm->fuel_gauge->get_property(cm->fuel_gauge, + POWER_SUPPLY_PROP_TEMP, + (union power_supply_propval *)temp); +#endif + return ret; +} + +static int cm_check_thermal_status(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + int temp, upper_limit, lower_limit; + int ret = 0; + + ret = cm_get_battery_temperature(cm, &temp); + if (ret) { + /* FIXME: + * No information of battery temperature might + * occur hazadous result. We have to handle it + * depending on battery type. + */ + dev_err(cm->dev, "Failed to get battery temperature\n"); + return 0; + } + + upper_limit = desc->temp_max; + lower_limit = desc->temp_min; + + if (cm->emergency_stop) { + upper_limit -= desc->temp_diff; + lower_limit += desc->temp_diff; + } + + if (temp > upper_limit) + ret = CM_EVENT_BATT_OVERHEAT; + else if (temp < lower_limit) + ret = CM_EVENT_BATT_COLD; + + return ret; } /** @@ -347,28 +614,57 @@ static void uevent_notify(struct charger_manager *cm, const char *event) */ static bool _cm_monitor(struct charger_manager *cm) { - struct charger_desc *desc = cm->desc; - int temp = desc->temperature_out_of_range(&cm->last_temp_mC); + int temp_alrt; - dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", - cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); + temp_alrt = cm_check_thermal_status(cm); - /* It has been stopped or charging already */ - if (!!temp == !!cm->emergency_stop) + /* It has been stopped already */ + if (temp_alrt && cm->emergency_stop) return false; - if (temp) { - cm->emergency_stop = temp; - if (!try_charger_enable(cm, false)) { - if (temp > 0) - uevent_notify(cm, "OVERHEAT"); - else - uevent_notify(cm, "COLD"); - } + /* + * Check temperature whether overheat or cold. + * If temperature is out of range normal state, stop charging. + */ + if (temp_alrt) { + cm->emergency_stop = temp_alrt; + if (!try_charger_enable(cm, false)) + uevent_notify(cm, default_event_names[temp_alrt]); + + /* + * Check whole charging duration and discharing duration + * after full-batt. + */ + } else if (!cm->emergency_stop && check_charging_duration(cm)) { + dev_dbg(cm->dev, + "Charging/Discharging duration is out of range\n"); + /* + * Check dropped voltage of battery. If battery voltage is more + * dropped than fullbatt_vchkdrop_uV after fully charged state, + * charger-manager have to recharge battery. + */ + } else if (!cm->emergency_stop && is_ext_pwr_online(cm) && + !cm->charger_enabled) { + fullbatt_vchk(&cm->fullbatt_vchk_work.work); + + /* + * Check whether fully charged state to protect overcharge + * if charger-manager is charging for battery. + */ + } else if (!cm->emergency_stop && is_full_charged(cm) && + cm->charger_enabled) { + dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n"); + uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); + + try_charger_enable(cm, false); + + fullbatt_vchk(&cm->fullbatt_vchk_work.work); } else { cm->emergency_stop = 0; - if (!try_charger_enable(cm, true)) - uevent_notify(cm, "CHARGING"); + if (is_ext_pwr_online(cm)) { + if (!try_charger_enable(cm, true)) + uevent_notify(cm, "CHARGING"); + } } return true; @@ -387,14 +683,143 @@ static bool cm_monitor(void) mutex_lock(&cm_list_mtx); - list_for_each_entry(cm, &cm_list, entry) - stop = stop || _cm_monitor(cm); + list_for_each_entry(cm, &cm_list, entry) { + if (_cm_monitor(cm)) + stop = true; + } mutex_unlock(&cm_list_mtx); return stop; } +/** + * _setup_polling - Setup the next instance of polling. + * @work: work_struct of the function _setup_polling. + */ +static void _setup_polling(struct work_struct *work) +{ + unsigned long min = ULONG_MAX; + struct charger_manager *cm; + bool keep_polling = false; + unsigned long _next_polling; + + mutex_lock(&cm_list_mtx); + + list_for_each_entry(cm, &cm_list, entry) { + if (is_polling_required(cm) && cm->desc->polling_interval_ms) { + keep_polling = true; + + if (min > cm->desc->polling_interval_ms) + min = cm->desc->polling_interval_ms; + } + } + + polling_jiffy = msecs_to_jiffies(min); + if (polling_jiffy <= CM_JIFFIES_SMALL) + polling_jiffy = CM_JIFFIES_SMALL + 1; + + if (!keep_polling) + polling_jiffy = ULONG_MAX; + if (polling_jiffy == ULONG_MAX) + goto out; + + WARN(cm_wq == NULL, "charger-manager: workqueue not initialized" + ". try it later. %s\n", __func__); + + /* + * Use mod_delayed_work() iff the next polling interval should + * occur before the currently scheduled one. If @cm_monitor_work + * isn't active, the end result is the same, so no need to worry + * about stale @next_polling. + */ + _next_polling = jiffies + polling_jiffy; + + if (time_before(_next_polling, next_polling)) { + mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy); + next_polling = _next_polling; + } else { + if (queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy)) + next_polling = _next_polling; + } +out: + mutex_unlock(&cm_list_mtx); +} +static DECLARE_WORK(setup_polling, _setup_polling); + +/** + * cm_monitor_poller - The Monitor / Poller. + * @work: work_struct of the function cm_monitor_poller + * + * During non-suspended state, cm_monitor_poller is used to poll and monitor + * the batteries. + */ +static void cm_monitor_poller(struct work_struct *work) +{ + cm_monitor(); + schedule_work(&setup_polling); +} + +/** + * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL + * @cm: the Charger Manager representing the battery. + */ +static void fullbatt_handler(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + + if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) + goto out; + + if (cm_suspended) + device_set_wakeup_capable(cm->dev, true); + + mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work, + msecs_to_jiffies(desc->fullbatt_vchkdrop_ms)); + cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies( + desc->fullbatt_vchkdrop_ms); + + if (cm->fullbatt_vchk_jiffies_at == 0) + cm->fullbatt_vchk_jiffies_at = 1; + +out: + dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n"); + uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); +} + +/** + * battout_handler - Event handler for CM_EVENT_BATT_OUT + * @cm: the Charger Manager representing the battery. + */ +static void battout_handler(struct charger_manager *cm) +{ + if (cm_suspended) + device_set_wakeup_capable(cm->dev, true); + + if (!is_batt_present(cm)) { + dev_emerg(cm->dev, "Battery Pulled Out!\n"); + uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]); + } else { + uevent_notify(cm, "Battery Reinserted?"); + } +} + +/** + * misc_event_handler - Handler for other evnets + * @cm: the Charger Manager representing the battery. + * @type: the Charger Manager representing the battery. + */ +static void misc_event_handler(struct charger_manager *cm, + enum cm_event_types type) +{ + if (cm_suspended) + device_set_wakeup_capable(cm->dev, true); + + if (is_polling_required(cm) && cm->desc->polling_interval_ms) + schedule_work(&setup_polling); + uevent_notify(cm, default_event_names[type]); +} + static int charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -402,7 +827,8 @@ static int charger_get_property(struct power_supply *psy, struct charger_manager *cm = container_of(psy, struct charger_manager, charger_psy); struct charger_desc *desc = cm->desc; - int i, ret = 0, uV; + int ret = 0; + int uV; switch (psp) { case POWER_SUPPLY_PROP_STATUS: @@ -428,29 +854,15 @@ static int charger_get_property(struct power_supply *psy, val->intval = 0; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: - ret = get_batt_uV(cm, &i); - val->intval = i; + ret = get_batt_uV(cm, &val->intval); break; case POWER_SUPPLY_PROP_CURRENT_NOW: ret = cm->fuel_gauge->get_property(cm->fuel_gauge, POWER_SUPPLY_PROP_CURRENT_NOW, val); break; case POWER_SUPPLY_PROP_TEMP: - /* in thenth of centigrade */ - if (cm->last_temp_mC == INT_MIN) - desc->temperature_out_of_range(&cm->last_temp_mC); - val->intval = cm->last_temp_mC / 100; - if (!desc->measure_battery_temp) - ret = -ENODEV; - break; case POWER_SUPPLY_PROP_TEMP_AMBIENT: - /* in thenth of centigrade */ - if (cm->last_temp_mC == INT_MIN) - desc->temperature_out_of_range(&cm->last_temp_mC); - val->intval = cm->last_temp_mC / 100; - if (desc->measure_battery_temp) - ret = -ENODEV; - break; + return cm_get_battery_temperature(cm, &val->intval); case POWER_SUPPLY_PROP_CAPACITY: if (!cm->fuel_gauge) { ret = -ENODEV; @@ -504,47 +916,10 @@ static int charger_get_property(struct power_supply *psy, val->intval = 0; break; case POWER_SUPPLY_PROP_CHARGE_FULL: - if (cm->fuel_gauge) { - if (cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0) - break; - } - - if (is_ext_pwr_online(cm)) { - /* Not full if it's charging. */ - if (is_charging(cm)) { - val->intval = 0; - break; - } - /* - * Full if it's powered but not charging andi - * not forced stop by emergency - */ - if (!cm->emergency_stop) { - val->intval = 1; - break; - } - } - - /* Full if it's over the fullbatt voltage */ - ret = get_batt_uV(cm, &uV); - if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && - !is_charging(cm)) { + if (is_full_charged(cm)) val->intval = 1; - break; - } - - /* Full if the cap is 100 */ - if (cm->fuel_gauge) { - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CAPACITY, val); - if (!ret && val->intval >= 100 && !is_charging(cm)) { - val->intval = 1; - break; - } - } - - val->intval = 0; + else + val->intval = 0; ret = 0; break; case POWER_SUPPLY_PROP_CHARGE_NOW: @@ -616,6 +991,21 @@ static bool cm_setup_timer(void) mutex_lock(&cm_list_mtx); list_for_each_entry(cm, &cm_list, entry) { + unsigned int fbchk_ms = 0; + + /* fullbatt_vchk is required. setup timer for that */ + if (cm->fullbatt_vchk_jiffies_at) { + fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at + - jiffies); + if (time_is_before_eq_jiffies( + cm->fullbatt_vchk_jiffies_at) || + msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) { + fullbatt_vchk(&cm->fullbatt_vchk_work.work); + fbchk_ms = 0; + } + } + CM_MIN_VALID(wakeup_ms, fbchk_ms); + /* Skip if polling is not required for this CM */ if (!is_polling_required(cm) && !cm->emergency_stop) continue; @@ -627,7 +1017,7 @@ static bool cm_setup_timer(void) mutex_unlock(&cm_list_mtx); if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { - pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); + pr_info("Charger Manager wakeup timer: %u ms\n", wakeup_ms); if (rtc_dev) { struct rtc_wkalrm tmp; unsigned long time, now; @@ -660,8 +1050,7 @@ static bool cm_setup_timer(void) ret = false; } - pr_info("Waking up after %lu secs.\n", - time - now); + pr_info("Waking up after %lu secs\n", time - now); rtc_time_to_tm(time, &tmp.time); rtc_set_alarm(rtc_dev, &tmp); @@ -675,6 +1064,23 @@ static bool cm_setup_timer(void) return false; } +static void _cm_fbchk_in_suspend(struct charger_manager *cm) +{ + unsigned long jiffy_now = jiffies; + + if (!cm->fullbatt_vchk_jiffies_at) + return; + + if (g_desc && g_desc->assume_timer_stops_in_suspend) + jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms); + + /* Execute now if it's going to be executed not too long after */ + jiffy_now += CM_JIFFIES_SMALL; + + if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at)) + fullbatt_vchk(&cm->fullbatt_vchk_work.work); +} + /** * cm_suspend_again - Determine whether suspend again or not * @@ -696,9 +1102,13 @@ bool cm_suspend_again(void) ret = true; mutex_lock(&cm_list_mtx); list_for_each_entry(cm, &cm_list, entry) { + _cm_fbchk_in_suspend(cm); + if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || - cm->status_save_batt != is_batt_present(cm)) + cm->status_save_batt != is_batt_present(cm)) { ret = false; + break; + } } mutex_unlock(&cm_list_mtx); @@ -735,7 +1145,7 @@ int setup_charger_manager(struct charger_global_desc *gd) g_desc = NULL; if (!gd->rtc_only_wakeup) { - pr_err("The callback rtc_only_wakeup is not given.\n"); + pr_err("The callback rtc_only_wakeup is not given\n"); return -EINVAL; } @@ -746,7 +1156,7 @@ int setup_charger_manager(struct charger_global_desc *gd) /* Retry at probe. RTC may be not registered yet */ } } else { - pr_warn("No wakeup timer is given for charger manager." + pr_warn("No wakeup timer is given for charger manager. " "In-suspend monitoring won't work.\n"); } @@ -755,126 +1165,618 @@ int setup_charger_manager(struct charger_global_desc *gd) } EXPORT_SYMBOL_GPL(setup_charger_manager); +/** + * charger_extcon_work - enable/diable charger according to the state + * of charger cable + * + * @work: work_struct of the function charger_extcon_work. + */ +static void charger_extcon_work(struct work_struct *work) +{ + struct charger_cable *cable = + container_of(work, struct charger_cable, wq); + int ret; + + if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) { + ret = regulator_set_current_limit(cable->charger->consumer, + cable->min_uA, cable->max_uA); + if (ret < 0) { + pr_err("Cannot set current limit of %s (%s)\n", + cable->charger->regulator_name, cable->name); + return; + } + + pr_info("Set current limit of %s : %duA ~ %duA\n", + cable->charger->regulator_name, + cable->min_uA, cable->max_uA); + } + + try_charger_enable(cable->cm, cable->attached); +} + +/** + * charger_extcon_notifier - receive the state of charger cable + * when registered cable is attached or detached. + * + * @self: the notifier block of the charger_extcon_notifier. + * @event: the cable state. + * @ptr: the data pointer of notifier block. + */ +static int charger_extcon_notifier(struct notifier_block *self, + unsigned long event, void *ptr) +{ + struct charger_cable *cable = + container_of(self, struct charger_cable, nb); + + /* + * The newly state of charger cable. + * If cable is attached, cable->attached is true. + */ + cable->attached = event; + + /* + * Setup monitoring to check battery state + * when charger cable is attached. + */ + if (cable->attached && is_polling_required(cable->cm)) { + cancel_work_sync(&setup_polling); + schedule_work(&setup_polling); + } + + /* + * Setup work for controlling charger(regulator) + * according to charger cable. + */ + schedule_work(&cable->wq); + + return NOTIFY_DONE; +} + +/** + * charger_extcon_init - register external connector to use it + * as the charger cable + * + * @cm: the Charger Manager representing the battery. + * @cable: the Charger cable representing the external connector. + */ +static int charger_extcon_init(struct charger_manager *cm, + struct charger_cable *cable) +{ + int ret = 0; + + /* + * Charger manager use Extcon framework to identify + * the charger cable among various external connector + * cable (e.g., TA, USB, MHL, Dock). + */ + INIT_WORK(&cable->wq, charger_extcon_work); + cable->nb.notifier_call = charger_extcon_notifier; + ret = extcon_register_interest(&cable->extcon_dev, + cable->extcon_name, cable->name, &cable->nb); + if (ret < 0) { + pr_info("Cannot register extcon_dev for %s(cable: %s)\n", + cable->extcon_name, cable->name); + ret = -EINVAL; + } + + return ret; +} + +/** + * charger_manager_register_extcon - Register extcon device to recevie state + * of charger cable. + * @cm: the Charger Manager representing the battery. + * + * This function support EXTCON(External Connector) subsystem to detect the + * state of charger cables for enabling or disabling charger(regulator) and + * select the charger cable for charging among a number of external cable + * according to policy of H/W board. + */ +static int charger_manager_register_extcon(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + struct charger_regulator *charger; + int ret = 0; + int i; + int j; + + for (i = 0; i < desc->num_charger_regulators; i++) { + charger = &desc->charger_regulators[i]; + + charger->consumer = regulator_get(cm->dev, + charger->regulator_name); + if (IS_ERR(charger->consumer)) { + dev_err(cm->dev, "Cannot find charger(%s)\n", + charger->regulator_name); + return PTR_ERR(charger->consumer); + } + charger->cm = cm; + + for (j = 0; j < charger->num_cables; j++) { + struct charger_cable *cable = &charger->cables[j]; + + ret = charger_extcon_init(cm, cable); + if (ret < 0) { + dev_err(cm->dev, "Cannot initialize charger(%s)\n", + charger->regulator_name); + goto err; + } + cable->charger = charger; + cable->cm = cm; + } + } + +err: + return ret; +} + +/* help function of sysfs node to control charger(regulator) */ +static ssize_t charger_name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct charger_regulator *charger + = container_of(attr, struct charger_regulator, attr_name); + + return sprintf(buf, "%s\n", charger->regulator_name); +} + +static ssize_t charger_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct charger_regulator *charger + = container_of(attr, struct charger_regulator, attr_state); + int state = 0; + + if (!charger->externally_control) + state = regulator_is_enabled(charger->consumer); + + return sprintf(buf, "%s\n", state ? "enabled" : "disabled"); +} + +static ssize_t charger_externally_control_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct charger_regulator *charger = container_of(attr, + struct charger_regulator, attr_externally_control); + + return sprintf(buf, "%d\n", charger->externally_control); +} + +static ssize_t charger_externally_control_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) +{ + struct charger_regulator *charger + = container_of(attr, struct charger_regulator, + attr_externally_control); + struct charger_manager *cm = charger->cm; + struct charger_desc *desc = cm->desc; + int i; + int ret; + int externally_control; + int chargers_externally_control = 1; + + ret = sscanf(buf, "%d", &externally_control); + if (ret == 0) { + ret = -EINVAL; + return ret; + } + + if (!externally_control) { + charger->externally_control = 0; + return count; + } + + for (i = 0; i < desc->num_charger_regulators; i++) { + if (&desc->charger_regulators[i] != charger && + !desc->charger_regulators[i].externally_control) { + /* + * At least, one charger is controlled by + * charger-manager + */ + chargers_externally_control = 0; + break; + } + } + + if (!chargers_externally_control) { + if (cm->charger_enabled) { + try_charger_enable(charger->cm, false); + charger->externally_control = externally_control; + try_charger_enable(charger->cm, true); + } else { + charger->externally_control = externally_control; + } + } else { + dev_warn(cm->dev, + "'%s' regulator should be controlled in charger-manager because charger-manager must need at least one charger for charging\n", + charger->regulator_name); + } + + return count; +} + +/** + * charger_manager_register_sysfs - Register sysfs entry for each charger + * @cm: the Charger Manager representing the battery. + * + * This function add sysfs entry for charger(regulator) to control charger from + * user-space. If some development board use one more chargers for charging + * but only need one charger on specific case which is dependent on user + * scenario or hardware restrictions, the user enter 1 or 0(zero) to '/sys/ + * class/power_supply/battery/charger.[index]/externally_control'. For example, + * if user enter 1 to 'sys/class/power_supply/battery/charger.[index]/ + * externally_control, this charger isn't controlled from charger-manager and + * always stay off state of regulator. + */ +static int charger_manager_register_sysfs(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + struct charger_regulator *charger; + int chargers_externally_control = 1; + char buf[11]; + char *str; + int ret = 0; + int i; + + /* Create sysfs entry to control charger(regulator) */ + for (i = 0; i < desc->num_charger_regulators; i++) { + charger = &desc->charger_regulators[i]; + + snprintf(buf, 10, "charger.%d", i); + str = devm_kzalloc(cm->dev, + sizeof(char) * (strlen(buf) + 1), GFP_KERNEL); + if (!str) { + ret = -ENOMEM; + goto err; + } + strcpy(str, buf); + + charger->attrs[0] = &charger->attr_name.attr; + charger->attrs[1] = &charger->attr_state.attr; + charger->attrs[2] = &charger->attr_externally_control.attr; + charger->attrs[3] = NULL; + charger->attr_g.name = str; + charger->attr_g.attrs = charger->attrs; + + sysfs_attr_init(&charger->attr_name.attr); + charger->attr_name.attr.name = "name"; + charger->attr_name.attr.mode = 0444; + charger->attr_name.show = charger_name_show; + + sysfs_attr_init(&charger->attr_state.attr); + charger->attr_state.attr.name = "state"; + charger->attr_state.attr.mode = 0444; + charger->attr_state.show = charger_state_show; + + sysfs_attr_init(&charger->attr_externally_control.attr); + charger->attr_externally_control.attr.name + = "externally_control"; + charger->attr_externally_control.attr.mode = 0644; + charger->attr_externally_control.show + = charger_externally_control_show; + charger->attr_externally_control.store + = charger_externally_control_store; + + if (!desc->charger_regulators[i].externally_control || + !chargers_externally_control) + chargers_externally_control = 0; + + dev_info(cm->dev, "'%s' regulator's externally_control is %d\n", + charger->regulator_name, charger->externally_control); + + ret = sysfs_create_group(&cm->charger_psy.dev->kobj, + &charger->attr_g); + if (ret < 0) { + dev_err(cm->dev, "Cannot create sysfs entry of %s regulator\n", + charger->regulator_name); + ret = -EINVAL; + goto err; + } + } + + if (chargers_externally_control) { + dev_err(cm->dev, "Cannot register regulator because charger-manager must need at least one charger for charging battery\n"); + ret = -EINVAL; + goto err; + } + +err: + return ret; +} + +static int cm_init_thermal_data(struct charger_manager *cm) +{ + struct charger_desc *desc = cm->desc; + union power_supply_propval val; + int ret; + + /* Verify whether fuel gauge provides battery temperature */ + ret = cm->fuel_gauge->get_property(cm->fuel_gauge, + POWER_SUPPLY_PROP_TEMP, &val); + + if (!ret) { + cm->charger_psy.properties[cm->charger_psy.num_properties] = + POWER_SUPPLY_PROP_TEMP; + cm->charger_psy.num_properties++; + cm->desc->measure_battery_temp = true; + } +#ifdef CONFIG_THERMAL + cm->tzd_batt = cm->fuel_gauge->tzd; + + if (ret && desc->thermal_zone) { + cm->tzd_batt = + thermal_zone_get_zone_by_name(desc->thermal_zone); + if (IS_ERR(cm->tzd_batt)) + return PTR_ERR(cm->tzd_batt); + + /* Use external thermometer */ + cm->charger_psy.properties[cm->charger_psy.num_properties] = + POWER_SUPPLY_PROP_TEMP_AMBIENT; + cm->charger_psy.num_properties++; + cm->desc->measure_battery_temp = true; + ret = 0; + } +#endif + if (cm->desc->measure_battery_temp) { + /* NOTICE : Default allowable minimum charge temperature is 0 */ + if (!desc->temp_max) + desc->temp_max = CM_DEFAULT_CHARGE_TEMP_MAX; + if (!desc->temp_diff) + desc->temp_diff = CM_DEFAULT_RECHARGE_TEMP_DIFF; + } + + return ret; +} + +static struct of_device_id charger_manager_match[] = { + { + .compatible = "charger-manager", + }, + {}, +}; + +static struct charger_desc *of_cm_parse_desc(struct device *dev) +{ + struct charger_desc *desc; + struct device_node *np = dev->of_node; + u32 poll_mode = CM_POLL_DISABLE; + u32 battery_stat = CM_NO_BATTERY; + int num_chgs = 0; + + desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); + if (!desc) + return ERR_PTR(-ENOMEM); + + of_property_read_string(np, "cm-name", &desc->psy_name); + + of_property_read_u32(np, "cm-poll-mode", &poll_mode); + desc->polling_mode = poll_mode; + + of_property_read_u32(np, "cm-poll-interval", + &desc->polling_interval_ms); + + of_property_read_u32(np, "cm-fullbatt-vchkdrop-ms", + &desc->fullbatt_vchkdrop_ms); + of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt", + &desc->fullbatt_vchkdrop_uV); + of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV); + of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc); + of_property_read_u32(np, "cm-fullbatt-capacity", + &desc->fullbatt_full_capacity); + + of_property_read_u32(np, "cm-battery-stat", &battery_stat); + desc->battery_present = battery_stat; + + /* chargers */ + of_property_read_u32(np, "cm-num-chargers", &num_chgs); + if (num_chgs) { + /* Allocate empty bin at the tail of array */ + desc->psy_charger_stat = devm_kzalloc(dev, sizeof(char *) + * (num_chgs + 1), GFP_KERNEL); + if (desc->psy_charger_stat) { + int i; + for (i = 0; i < num_chgs; i++) + of_property_read_string_index(np, "cm-chargers", + i, &desc->psy_charger_stat[i]); + } else { + return ERR_PTR(-ENOMEM); + } + } + + of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge); + + of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone); + + of_property_read_u32(np, "cm-battery-cold", &desc->temp_min); + if (of_get_property(np, "cm-battery-cold-in-minus", NULL)) + desc->temp_min *= -1; + of_property_read_u32(np, "cm-battery-hot", &desc->temp_max); + of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff); + + of_property_read_u32(np, "cm-charging-max", + &desc->charging_max_duration_ms); + of_property_read_u32(np, "cm-discharging-max", + &desc->discharging_max_duration_ms); + + /* battery charger regualtors */ + desc->num_charger_regulators = of_get_child_count(np); + if (desc->num_charger_regulators) { + struct charger_regulator *chg_regs; + struct device_node *child; + + chg_regs = devm_kzalloc(dev, sizeof(*chg_regs) + * desc->num_charger_regulators, + GFP_KERNEL); + if (!chg_regs) + return ERR_PTR(-ENOMEM); + + desc->charger_regulators = chg_regs; + + for_each_child_of_node(np, child) { + struct charger_cable *cables; + struct device_node *_child; + + of_property_read_string(child, "cm-regulator-name", + &chg_regs->regulator_name); + + /* charger cables */ + chg_regs->num_cables = of_get_child_count(child); + if (chg_regs->num_cables) { + cables = devm_kzalloc(dev, sizeof(*cables) + * chg_regs->num_cables, + GFP_KERNEL); + if (!cables) + return ERR_PTR(-ENOMEM); + + chg_regs->cables = cables; + + for_each_child_of_node(child, _child) { + of_property_read_string(_child, + "cm-cable-name", &cables->name); + of_property_read_string(_child, + "cm-cable-extcon", + &cables->extcon_name); + of_property_read_u32(_child, + "cm-cable-min", + &cables->min_uA); + of_property_read_u32(_child, + "cm-cable-max", + &cables->max_uA); + cables++; + } + } + chg_regs++; + } + } + return desc; +} + +static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev) +{ + if (pdev->dev.of_node) + return of_cm_parse_desc(&pdev->dev); + return (struct charger_desc *)dev_get_platdata(&pdev->dev); +} + static int charger_manager_probe(struct platform_device *pdev) { - struct charger_desc *desc = dev_get_platdata(&pdev->dev); + struct charger_desc *desc = cm_get_drv_data(pdev); struct charger_manager *cm; int ret = 0, i = 0; + int j = 0; union power_supply_propval val; if (g_desc && !rtc_dev && g_desc->rtc_name) { rtc_dev = rtc_class_open(g_desc->rtc_name); if (IS_ERR_OR_NULL(rtc_dev)) { rtc_dev = NULL; - dev_err(&pdev->dev, "Cannot get RTC %s.\n", + dev_err(&pdev->dev, "Cannot get RTC %s\n", g_desc->rtc_name); - ret = -ENODEV; - goto err_alloc; + return -ENODEV; } } if (!desc) { - dev_err(&pdev->dev, "No platform data (desc) found.\n"); - ret = -ENODEV; - goto err_alloc; + dev_err(&pdev->dev, "No platform data (desc) found\n"); + return -ENODEV; } - cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); - if (!cm) { - dev_err(&pdev->dev, "Cannot allocate memory.\n"); - ret = -ENOMEM; - goto err_alloc; - } + cm = devm_kzalloc(&pdev->dev, + sizeof(struct charger_manager), GFP_KERNEL); + if (!cm) + return -ENOMEM; /* Basic Values. Unspecified are Null or 0 */ cm->dev = &pdev->dev; - cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); - if (!cm->desc) { - dev_err(&pdev->dev, "Cannot allocate memory.\n"); - ret = -ENOMEM; - goto err_alloc_desc; + cm->desc = desc; + + /* + * The following two do not need to be errors. + * Users may intentionally ignore those two features. + */ + if (desc->fullbatt_uV == 0) { + dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n"); + } + if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) { + dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n"); + desc->fullbatt_vchkdrop_ms = 0; + desc->fullbatt_vchkdrop_uV = 0; + } + if (desc->fullbatt_soc == 0) { + dev_info(&pdev->dev, "Ignoring full-battery soc(state of charge) threshold as it is not supplied\n"); + } + if (desc->fullbatt_full_capacity == 0) { + dev_info(&pdev->dev, "Ignoring full-battery full capacity threshold as it is not supplied\n"); } - memcpy(cm->desc, desc, sizeof(struct charger_desc)); - cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ if (!desc->charger_regulators || desc->num_charger_regulators < 1) { - ret = -EINVAL; - dev_err(&pdev->dev, "charger_regulators undefined.\n"); - goto err_no_charger; + dev_err(&pdev->dev, "charger_regulators undefined\n"); + return -EINVAL; } if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { - dev_err(&pdev->dev, "No power supply defined.\n"); - ret = -EINVAL; - goto err_no_charger_stat; + dev_err(&pdev->dev, "No power supply defined\n"); + return -EINVAL; } /* Counting index only */ while (desc->psy_charger_stat[i]) i++; - cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), - GFP_KERNEL); - if (!cm->charger_stat) { - ret = -ENOMEM; - goto err_no_charger_stat; - } + cm->charger_stat = devm_kzalloc(&pdev->dev, + sizeof(struct power_supply *) * i, GFP_KERNEL); + if (!cm->charger_stat) + return -ENOMEM; for (i = 0; desc->psy_charger_stat[i]; i++) { cm->charger_stat[i] = power_supply_get_by_name( desc->psy_charger_stat[i]); if (!cm->charger_stat[i]) { - dev_err(&pdev->dev, "Cannot find power supply " - "\"%s\"\n", - desc->psy_charger_stat[i]); - ret = -ENODEV; - goto err_chg_stat; + dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", + desc->psy_charger_stat[i]); + return -ENODEV; } } cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); if (!cm->fuel_gauge) { dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", - desc->psy_fuel_gauge); - ret = -ENODEV; - goto err_chg_stat; + desc->psy_fuel_gauge); + return -ENODEV; } if (desc->polling_interval_ms == 0 || msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { dev_err(&pdev->dev, "polling_interval_ms is too small\n"); - ret = -EINVAL; - goto err_chg_stat; + return -EINVAL; } - if (!desc->temperature_out_of_range) { - dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); - ret = -EINVAL; - goto err_chg_stat; + if (!desc->charging_max_duration_ms || + !desc->discharging_max_duration_ms) { + dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n"); + desc->charging_max_duration_ms = 0; + desc->discharging_max_duration_ms = 0; } platform_set_drvdata(pdev, cm); - memcpy(&cm->charger_psy, &psy_default, - sizeof(psy_default)); - if (!desc->psy_name) { - strncpy(cm->psy_name_buf, psy_default.name, - PSY_NAME_MAX); - } else { + memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); + + if (!desc->psy_name) + strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); + else strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); - } cm->charger_psy.name = cm->psy_name_buf; /* Allocate for psy properties because they may vary */ - cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) + cm->charger_psy.properties = devm_kzalloc(&pdev->dev, + sizeof(enum power_supply_property) * (ARRAY_SIZE(default_charger_props) + - NUM_CHARGER_PSY_OPTIONAL), - GFP_KERNEL); - if (!cm->charger_psy.properties) { - dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); - ret = -ENOMEM; - goto err_chg_stat; - } + NUM_CHARGER_PSY_OPTIONAL), GFP_KERNEL); + if (!cm->charger_psy.properties) + return -ENOMEM; + memcpy(cm->charger_psy.properties, default_charger_props, sizeof(enum power_supply_property) * ARRAY_SIZE(default_charger_props)); @@ -894,35 +1796,35 @@ static int charger_manager_probe(struct platform_device *pdev) POWER_SUPPLY_PROP_CURRENT_NOW; cm->charger_psy.num_properties++; } - if (!desc->measure_battery_temp) { - cm->charger_psy.properties[cm->charger_psy.num_properties] = - POWER_SUPPLY_PROP_TEMP_AMBIENT; - cm->charger_psy.num_properties++; - } - if (desc->measure_battery_temp) { - cm->charger_psy.properties[cm->charger_psy.num_properties] = - POWER_SUPPLY_PROP_TEMP; - cm->charger_psy.num_properties++; + + ret = cm_init_thermal_data(cm); + if (ret) { + dev_err(&pdev->dev, "Failed to initialize thermal data\n"); + cm->desc->measure_battery_temp = false; } + INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk); + ret = power_supply_register(NULL, &cm->charger_psy); if (ret) { - dev_err(&pdev->dev, "Cannot register charger-manager with" - " name \"%s\".\n", cm->charger_psy.name); - goto err_register; + dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n", + cm->charger_psy.name); + return ret; } - ret = regulator_bulk_get(&pdev->dev, desc->num_charger_regulators, - desc->charger_regulators); - if (ret) { - dev_err(&pdev->dev, "Cannot get charger regulators.\n"); - goto err_bulk_get; + /* Register extcon device for charger cable */ + ret = charger_manager_register_extcon(cm); + if (ret < 0) { + dev_err(&pdev->dev, "Cannot initialize extcon device\n"); + goto err_reg_extcon; } - ret = try_charger_enable(cm, true); - if (ret) { - dev_err(&pdev->dev, "Cannot enable charger regulators\n"); - goto err_chg_enable; + /* Register sysfs entry for charger(regulator) */ + ret = charger_manager_register_sysfs(cm); + if (ret < 0) { + dev_err(&pdev->dev, + "Cannot initialize sysfs entry of regulator\n"); + goto err_reg_sysfs; } /* Add to the list */ @@ -930,46 +1832,75 @@ static int charger_manager_probe(struct platform_device *pdev) list_add(&cm->entry, &cm_list); mutex_unlock(&cm_list_mtx); + /* + * Charger-manager is capable of waking up the systme from sleep + * when event is happend through cm_notify_event() + */ + device_init_wakeup(&pdev->dev, true); + device_set_wakeup_capable(&pdev->dev, false); + + schedule_work(&setup_polling); + return 0; -err_chg_enable: - if (desc->charger_regulators) - regulator_bulk_free(desc->num_charger_regulators, - desc->charger_regulators); -err_bulk_get: +err_reg_sysfs: + for (i = 0; i < desc->num_charger_regulators; i++) { + struct charger_regulator *charger; + + charger = &desc->charger_regulators[i]; + sysfs_remove_group(&cm->charger_psy.dev->kobj, + &charger->attr_g); + } +err_reg_extcon: + for (i = 0; i < desc->num_charger_regulators; i++) { + struct charger_regulator *charger; + + charger = &desc->charger_regulators[i]; + for (j = 0; j < charger->num_cables; j++) { + struct charger_cable *cable = &charger->cables[j]; + /* Remove notifier block if only edev exists */ + if (cable->extcon_dev.edev) + extcon_unregister_interest(&cable->extcon_dev); + } + + regulator_put(desc->charger_regulators[i].consumer); + } + power_supply_unregister(&cm->charger_psy); -err_register: - kfree(cm->charger_psy.properties); -err_chg_stat: - kfree(cm->charger_stat); -err_no_charger_stat: -err_no_charger: - kfree(cm->desc); -err_alloc_desc: - kfree(cm); -err_alloc: + return ret; } -static int __devexit charger_manager_remove(struct platform_device *pdev) +static int charger_manager_remove(struct platform_device *pdev) { struct charger_manager *cm = platform_get_drvdata(pdev); struct charger_desc *desc = cm->desc; + int i = 0; + int j = 0; /* Remove from the list */ mutex_lock(&cm_list_mtx); list_del(&cm->entry); mutex_unlock(&cm_list_mtx); - if (desc->charger_regulators) - regulator_bulk_free(desc->num_charger_regulators, - desc->charger_regulators); + cancel_work_sync(&setup_polling); + cancel_delayed_work_sync(&cm_monitor_work); + + for (i = 0 ; i < desc->num_charger_regulators ; i++) { + struct charger_regulator *charger + = &desc->charger_regulators[i]; + for (j = 0 ; j < charger->num_cables ; j++) { + struct charger_cable *cable = &charger->cables[j]; + extcon_unregister_interest(&cable->extcon_dev); + } + } + + for (i = 0 ; i < desc->num_charger_regulators ; i++) + regulator_put(desc->charger_regulators[i].consumer); power_supply_unregister(&cm->charger_psy); - kfree(cm->charger_psy.properties); - kfree(cm->charger_stat); - kfree(cm->desc); - kfree(cm); + + try_charger_enable(cm, false); return 0; } @@ -980,11 +1911,21 @@ static const struct platform_device_id charger_manager_id[] = { }; MODULE_DEVICE_TABLE(platform, charger_manager_id); +static int cm_suspend_noirq(struct device *dev) +{ + int ret = 0; + + if (device_may_wakeup(dev)) { + device_set_wakeup_capable(dev, false); + ret = -EAGAIN; + } + + return ret; +} + static int cm_suspend_prepare(struct device *dev) { - struct platform_device *pdev = container_of(dev, struct platform_device, - dev); - struct charger_manager *cm = platform_get_drvdata(pdev); + struct charger_manager *cm = dev_get_drvdata(dev); if (!cm_suspended) { if (rtc_dev) { @@ -1007,6 +1948,7 @@ static int cm_suspend_prepare(struct device *dev) cm_suspended = true; } + cancel_delayed_work(&cm->fullbatt_vchk_work); cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); cm->status_save_batt = is_batt_present(cm); @@ -1020,9 +1962,7 @@ static int cm_suspend_prepare(struct device *dev) static void cm_suspend_complete(struct device *dev) { - struct platform_device *pdev = container_of(dev, struct platform_device, - dev); - struct charger_manager *cm = platform_get_drvdata(pdev); + struct charger_manager *cm = dev_get_drvdata(dev); if (cm_suspended) { if (rtc_dev) { @@ -1036,11 +1976,40 @@ static void cm_suspend_complete(struct device *dev) cm_rtc_set = false; } + /* Re-enqueue delayed work (fullbatt_vchk_work) */ + if (cm->fullbatt_vchk_jiffies_at) { + unsigned long delay = 0; + unsigned long now = jiffies + CM_JIFFIES_SMALL; + + if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) { + delay = (unsigned long)((long)now + - (long)(cm->fullbatt_vchk_jiffies_at)); + delay = jiffies_to_msecs(delay); + } else { + delay = 0; + } + + /* + * Account for cm_suspend_duration_ms if + * assume_timer_stops_in_suspend is active + */ + if (g_desc && g_desc->assume_timer_stops_in_suspend) { + if (delay > cm_suspend_duration_ms) + delay -= cm_suspend_duration_ms; + else + delay = 0; + } + + queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, + msecs_to_jiffies(delay)); + } + device_set_wakeup_capable(cm->dev, false); uevent_notify(cm, NULL); } static const struct dev_pm_ops charger_manager_pm = { .prepare = cm_suspend_prepare, + .suspend_noirq = cm_suspend_noirq, .complete = cm_suspend_complete, }; @@ -1049,24 +2018,100 @@ static struct platform_driver charger_manager_driver = { .name = "charger-manager", .owner = THIS_MODULE, .pm = &charger_manager_pm, + .of_match_table = charger_manager_match, }, .probe = charger_manager_probe, - .remove = __devexit_p(charger_manager_remove), + .remove = charger_manager_remove, .id_table = charger_manager_id, }; static int __init charger_manager_init(void) { + cm_wq = create_freezable_workqueue("charger_manager"); + INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller); + return platform_driver_register(&charger_manager_driver); } late_initcall(charger_manager_init); static void __exit charger_manager_cleanup(void) { + destroy_workqueue(cm_wq); + cm_wq = NULL; + platform_driver_unregister(&charger_manager_driver); } module_exit(charger_manager_cleanup); +/** + * find_power_supply - find the associated power_supply of charger + * @cm: the Charger Manager representing the battery + * @psy: pointer to instance of charger's power_supply + */ +static bool find_power_supply(struct charger_manager *cm, + struct power_supply *psy) +{ + int i; + bool found = false; + + for (i = 0; cm->charger_stat[i]; i++) { + if (psy == cm->charger_stat[i]) { + found = true; + break; + } + } + + return found; +} + +/** + * cm_notify_event - charger driver notify Charger Manager of charger event + * @psy: pointer to instance of charger's power_supply + * @type: type of charger event + * @msg: optional message passed to uevent_notify fuction + */ +void cm_notify_event(struct power_supply *psy, enum cm_event_types type, + char *msg) +{ + struct charger_manager *cm; + bool found_power_supply = false; + + if (psy == NULL) + return; + + mutex_lock(&cm_list_mtx); + list_for_each_entry(cm, &cm_list, entry) { + found_power_supply = find_power_supply(cm, psy); + if (found_power_supply) + break; + } + mutex_unlock(&cm_list_mtx); + + if (!found_power_supply) + return; + + switch (type) { + case CM_EVENT_BATT_FULL: + fullbatt_handler(cm); + break; + case CM_EVENT_BATT_OUT: + battout_handler(cm); + break; + case CM_EVENT_BATT_IN: + case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP: + misc_event_handler(cm, type); + break; + case CM_EVENT_UNKNOWN: + case CM_EVENT_OTHERS: + uevent_notify(cm, msg ? msg : default_event_names[type]); + break; + default: + dev_err(cm->dev, "%s: type not specified\n", __func__); + break; + } +} +EXPORT_SYMBOL_GPL(cm_notify_event); + MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); MODULE_DESCRIPTION("Charger Manager"); MODULE_LICENSE("GPL"); |