mirror of https://gitee.com/openkylin/linux.git
1909 lines
49 KiB
C
1909 lines
49 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics Co., Ltd.
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* MyungJoo Ham <myungjoo.ham@samsung.com>
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*
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* This driver enables to monitor battery health and control charger
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* during suspend-to-mem.
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* Charger manager depends on other devices. register this later than
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* the depending devices.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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**/
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/rtc.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/platform_device.h>
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#include <linux/power/charger-manager.h>
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#include <linux/regulator/consumer.h>
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#include <linux/sysfs.h>
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static const char * const default_event_names[] = {
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[CM_EVENT_UNKNOWN] = "Unknown",
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[CM_EVENT_BATT_FULL] = "Battery Full",
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[CM_EVENT_BATT_IN] = "Battery Inserted",
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[CM_EVENT_BATT_OUT] = "Battery Pulled Out",
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[CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach",
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[CM_EVENT_CHG_START_STOP] = "Charging Start/Stop",
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[CM_EVENT_OTHERS] = "Other battery events"
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};
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/*
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* Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
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* delayed works so that we can run delayed works with CM_JIFFIES_SMALL
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* without any delays.
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*/
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#define CM_JIFFIES_SMALL (2)
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/* If y is valid (> 0) and smaller than x, do x = y */
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#define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x))
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/*
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* Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking
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* rtc alarm. It should be 2 or larger
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*/
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#define CM_RTC_SMALL (2)
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#define UEVENT_BUF_SIZE 32
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static LIST_HEAD(cm_list);
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static DEFINE_MUTEX(cm_list_mtx);
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/* About in-suspend (suspend-again) monitoring */
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static struct rtc_device *rtc_dev;
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/*
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* Backup RTC alarm
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* Save the wakeup alarm before entering suspend-to-RAM
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*/
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static struct rtc_wkalrm rtc_wkalarm_save;
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/* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */
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static unsigned long rtc_wkalarm_save_time;
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static bool cm_suspended;
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static bool cm_rtc_set;
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static unsigned long cm_suspend_duration_ms;
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/* About normal (not suspended) monitoring */
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static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */
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static unsigned long next_polling; /* Next appointed polling time */
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static struct workqueue_struct *cm_wq; /* init at driver add */
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static struct delayed_work cm_monitor_work; /* init at driver add */
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/* Global charger-manager description */
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static struct charger_global_desc *g_desc; /* init with setup_charger_manager */
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/**
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* is_batt_present - See if the battery presents in place.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_batt_present(struct charger_manager *cm)
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{
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union power_supply_propval val;
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bool present = false;
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int i, ret;
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switch (cm->desc->battery_present) {
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case CM_BATTERY_PRESENT:
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present = true;
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break;
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case CM_NO_BATTERY:
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break;
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case CM_FUEL_GAUGE:
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_PRESENT, &val);
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if (ret == 0 && val.intval)
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present = true;
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break;
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case CM_CHARGER_STAT:
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for (i = 0; cm->charger_stat[i]; i++) {
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_PRESENT, &val);
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if (ret == 0 && val.intval) {
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present = true;
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break;
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}
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}
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break;
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}
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return present;
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}
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/**
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* is_ext_pwr_online - See if an external power source is attached to charge
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* @cm: the Charger Manager representing the battery.
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*
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* Returns true if at least one of the chargers of the battery has an external
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* power source attached to charge the battery regardless of whether it is
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* actually charging or not.
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*/
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static bool is_ext_pwr_online(struct charger_manager *cm)
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{
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union power_supply_propval val;
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bool online = false;
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int i, ret;
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/* If at least one of them has one, it's yes. */
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for (i = 0; cm->charger_stat[i]; i++) {
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_ONLINE, &val);
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if (ret == 0 && val.intval) {
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online = true;
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break;
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}
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}
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return online;
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}
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/**
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* get_batt_uV - Get the voltage level of the battery
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* @cm: the Charger Manager representing the battery.
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* @uV: the voltage level returned.
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*
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* Returns 0 if there is no error.
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* Returns a negative value on error.
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*/
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static int get_batt_uV(struct charger_manager *cm, int *uV)
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{
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union power_supply_propval val;
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int ret;
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if (!cm->fuel_gauge)
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return -ENODEV;
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
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if (ret)
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return ret;
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*uV = val.intval;
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return 0;
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}
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/**
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* is_charging - Returns true if the battery is being charged.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_charging(struct charger_manager *cm)
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{
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int i, ret;
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bool charging = false;
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union power_supply_propval val;
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/* If there is no battery, it cannot be charged */
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if (!is_batt_present(cm))
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return false;
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/* If at least one of the charger is charging, return yes */
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for (i = 0; cm->charger_stat[i]; i++) {
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/* 1. The charger sholuld not be DISABLED */
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if (cm->emergency_stop)
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continue;
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if (!cm->charger_enabled)
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continue;
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/* 2. The charger should be online (ext-power) */
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_ONLINE, &val);
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if (ret) {
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dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n",
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cm->desc->psy_charger_stat[i]);
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continue;
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}
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if (val.intval == 0)
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continue;
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/*
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* 3. The charger should not be FULL, DISCHARGING,
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* or NOT_CHARGING.
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*/
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_STATUS, &val);
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if (ret) {
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dev_warn(cm->dev, "Cannot read STATUS value from %s.\n",
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cm->desc->psy_charger_stat[i]);
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continue;
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}
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if (val.intval == POWER_SUPPLY_STATUS_FULL ||
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val.intval == POWER_SUPPLY_STATUS_DISCHARGING ||
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val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING)
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continue;
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/* Then, this is charging. */
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charging = true;
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break;
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}
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return charging;
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}
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/**
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* is_full_charged - Returns true if the battery is fully charged.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_full_charged(struct charger_manager *cm)
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{
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struct charger_desc *desc = cm->desc;
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union power_supply_propval val;
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int ret = 0;
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int uV;
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/* If there is no battery, it cannot be charged */
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if (!is_batt_present(cm)) {
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val.intval = 0;
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goto out;
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}
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if (cm->fuel_gauge && desc->fullbatt_full_capacity > 0) {
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/* Not full if capacity of fuel gauge isn't full */
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_CHARGE_FULL, &val);
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if (!ret && val.intval > desc->fullbatt_full_capacity) {
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val.intval = 1;
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goto out;
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}
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}
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/* Full, if it's over the fullbatt voltage */
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if (desc->fullbatt_uV > 0) {
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ret = get_batt_uV(cm, &uV);
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if (!ret && uV >= desc->fullbatt_uV) {
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val.intval = 1;
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goto out;
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}
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}
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/* Full, if the capacity is more than fullbatt_soc */
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if (cm->fuel_gauge && desc->fullbatt_soc > 0) {
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_CAPACITY, &val);
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if (!ret && val.intval >= desc->fullbatt_soc) {
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val.intval = 1;
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goto out;
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}
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}
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val.intval = 0;
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out:
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return val.intval ? true : false;
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}
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/**
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* is_polling_required - Return true if need to continue polling for this CM.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_polling_required(struct charger_manager *cm)
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{
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switch (cm->desc->polling_mode) {
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case CM_POLL_DISABLE:
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return false;
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case CM_POLL_ALWAYS:
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return true;
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case CM_POLL_EXTERNAL_POWER_ONLY:
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return is_ext_pwr_online(cm);
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case CM_POLL_CHARGING_ONLY:
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return is_charging(cm);
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default:
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dev_warn(cm->dev, "Incorrect polling_mode (%d)\n",
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cm->desc->polling_mode);
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}
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return false;
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}
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/**
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* try_charger_enable - Enable/Disable chargers altogether
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* @cm: the Charger Manager representing the battery.
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* @enable: true: enable / false: disable
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*
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* Note that Charger Manager keeps the charger enabled regardless whether
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* the charger is charging or not (because battery is full or no external
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* power source exists) except when CM needs to disable chargers forcibly
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* bacause of emergency causes; when the battery is overheated or too cold.
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*/
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static int try_charger_enable(struct charger_manager *cm, bool enable)
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{
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int err = 0, i;
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struct charger_desc *desc = cm->desc;
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/* Ignore if it's redundent command */
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if (enable == cm->charger_enabled)
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return 0;
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if (enable) {
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if (cm->emergency_stop)
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return -EAGAIN;
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/*
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* Save start time of charging to limit
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* maximum possible charging time.
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*/
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cm->charging_start_time = ktime_to_ms(ktime_get());
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cm->charging_end_time = 0;
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for (i = 0 ; i < desc->num_charger_regulators ; i++) {
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if (desc->charger_regulators[i].externally_control)
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continue;
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err = regulator_enable(desc->charger_regulators[i].consumer);
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if (err < 0) {
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dev_warn(cm->dev,
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"Cannot enable %s regulator\n",
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desc->charger_regulators[i].regulator_name);
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}
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}
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} else {
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/*
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* Save end time of charging to maintain fully charged state
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* of battery after full-batt.
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*/
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cm->charging_start_time = 0;
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cm->charging_end_time = ktime_to_ms(ktime_get());
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for (i = 0 ; i < desc->num_charger_regulators ; i++) {
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if (desc->charger_regulators[i].externally_control)
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continue;
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err = regulator_disable(desc->charger_regulators[i].consumer);
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if (err < 0) {
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dev_warn(cm->dev,
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"Cannot disable %s regulator\n",
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desc->charger_regulators[i].regulator_name);
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}
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}
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/*
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* Abnormal battery state - Stop charging forcibly,
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* even if charger was enabled at the other places
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*/
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for (i = 0; i < desc->num_charger_regulators; i++) {
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if (regulator_is_enabled(
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desc->charger_regulators[i].consumer)) {
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regulator_force_disable(
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desc->charger_regulators[i].consumer);
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dev_warn(cm->dev,
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"Disable regulator(%s) forcibly.\n",
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desc->charger_regulators[i].regulator_name);
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}
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}
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}
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if (!err)
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cm->charger_enabled = enable;
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return err;
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}
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/**
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* try_charger_restart - Restart charging.
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* @cm: the Charger Manager representing the battery.
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*
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* Restart charging by turning off and on the charger.
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*/
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static int try_charger_restart(struct charger_manager *cm)
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{
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int err;
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if (cm->emergency_stop)
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return -EAGAIN;
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err = try_charger_enable(cm, false);
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if (err)
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return err;
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return try_charger_enable(cm, true);
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}
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/**
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* uevent_notify - Let users know something has changed.
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* @cm: the Charger Manager representing the battery.
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* @event: the event string.
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*
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* If @event is null, it implies that uevent_notify is called
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* by resume function. When called in the resume function, cm_suspended
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* should be already reset to false in order to let uevent_notify
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* notify the recent event during the suspend to users. While
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* suspended, uevent_notify does not notify users, but tracks
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* events so that uevent_notify can notify users later after resumed.
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*/
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static void uevent_notify(struct charger_manager *cm, const char *event)
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{
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static char env_str[UEVENT_BUF_SIZE + 1] = "";
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static char env_str_save[UEVENT_BUF_SIZE + 1] = "";
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if (cm_suspended) {
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/* Nothing in suspended-event buffer */
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if (env_str_save[0] == 0) {
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if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
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return; /* status not changed */
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strncpy(env_str_save, event, UEVENT_BUF_SIZE);
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return;
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}
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if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE))
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return; /* Duplicated. */
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strncpy(env_str_save, event, UEVENT_BUF_SIZE);
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return;
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}
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if (event == NULL) {
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/* No messages pending */
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if (!env_str_save[0])
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return;
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strncpy(env_str, env_str_save, UEVENT_BUF_SIZE);
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kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
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env_str_save[0] = 0;
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return;
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}
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/* status not changed */
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if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
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return;
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/* save the status and notify the update */
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strncpy(env_str, event, UEVENT_BUF_SIZE);
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kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
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dev_info(cm->dev, event);
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}
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/**
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* fullbatt_vchk - Check voltage drop some times after "FULL" event.
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* @work: the work_struct appointing the function
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*
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* If a user has designated "fullbatt_vchkdrop_ms/uV" values with
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* charger_desc, Charger Manager checks voltage drop after the battery
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* "FULL" event. It checks whether the voltage has dropped more than
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* fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms.
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*/
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static void fullbatt_vchk(struct work_struct *work)
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{
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struct delayed_work *dwork = to_delayed_work(work);
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struct charger_manager *cm = container_of(dwork,
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struct charger_manager, fullbatt_vchk_work);
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struct charger_desc *desc = cm->desc;
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int batt_uV, err, diff;
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/* remove the appointment for fullbatt_vchk */
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cm->fullbatt_vchk_jiffies_at = 0;
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if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
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return;
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err = get_batt_uV(cm, &batt_uV);
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if (err) {
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dev_err(cm->dev, "%s: get_batt_uV error(%d).\n", __func__, err);
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return;
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}
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diff = desc->fullbatt_uV;
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diff -= batt_uV;
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dev_info(cm->dev, "VBATT dropped %duV after full-batt.\n", diff);
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if (diff > desc->fullbatt_vchkdrop_uV) {
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try_charger_restart(cm);
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uevent_notify(cm, "Recharging");
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}
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}
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/**
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* check_charging_duration - Monitor charging/discharging duration
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* @cm: the Charger Manager representing the battery.
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*
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* If whole charging duration exceed 'charging_max_duration_ms',
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* cm stop charging to prevent overcharge/overheat. If discharging
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* duration exceed 'discharging _max_duration_ms', charger cable is
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* attached, after full-batt, cm start charging to maintain fully
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* charged state for battery.
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*/
|
|
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 %lldms",
|
|
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 %lldms",
|
|
desc->discharging_max_duration_ms);
|
|
uevent_notify(cm, "Recharing");
|
|
try_charger_enable(cm, true);
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* _cm_monitor - Monitor the temperature and return true for exceptions.
|
|
* @cm: the Charger Manager representing the battery.
|
|
*
|
|
* Returns true if there is an event to notify for the battery.
|
|
* (True if the status of "emergency_stop" changes)
|
|
*/
|
|
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);
|
|
|
|
dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
|
|
cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
|
|
|
|
/* It has been stopped already */
|
|
if (temp && cm->emergency_stop)
|
|
return false;
|
|
|
|
/*
|
|
* Check temperature whether overheat or cold.
|
|
* If temperature is out of range normal state, stop charging.
|
|
*/
|
|
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 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");
|
|
/*
|
|
* 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 (is_ext_pwr_online(cm)) {
|
|
if (!try_charger_enable(cm, true))
|
|
uevent_notify(cm, "CHARGING");
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* cm_monitor - Monitor every battery.
|
|
*
|
|
* Returns true if there is an event to notify from any of the batteries.
|
|
* (True if the status of "emergency_stop" changes)
|
|
*/
|
|
static bool cm_monitor(void)
|
|
{
|
|
bool stop = false;
|
|
struct charger_manager *cm;
|
|
|
|
mutex_lock(&cm_list_mtx);
|
|
|
|
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__);
|
|
|
|
_next_polling = jiffies + polling_jiffy;
|
|
|
|
if (!delayed_work_pending(&cm_monitor_work) ||
|
|
(delayed_work_pending(&cm_monitor_work) &&
|
|
time_after(next_polling, _next_polling))) {
|
|
next_polling = jiffies + polling_jiffy;
|
|
mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
|
|
}
|
|
|
|
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 (!delayed_work_pending(&cm_monitor_work) &&
|
|
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)
|
|
{
|
|
struct charger_manager *cm = container_of(psy,
|
|
struct charger_manager, charger_psy);
|
|
struct charger_desc *desc = cm->desc;
|
|
int ret = 0;
|
|
int uV;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
if (is_charging(cm))
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
else if (is_ext_pwr_online(cm))
|
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
else
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
break;
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
if (cm->emergency_stop > 0)
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
|
|
else if (cm->emergency_stop < 0)
|
|
val->intval = POWER_SUPPLY_HEALTH_COLD;
|
|
else
|
|
val->intval = POWER_SUPPLY_HEALTH_GOOD;
|
|
break;
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
if (is_batt_present(cm))
|
|
val->intval = 1;
|
|
else
|
|
val->intval = 0;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
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;
|
|
case POWER_SUPPLY_PROP_CAPACITY:
|
|
if (!cm->fuel_gauge) {
|
|
ret = -ENODEV;
|
|
break;
|
|
}
|
|
|
|
if (!is_batt_present(cm)) {
|
|
/* There is no battery. Assume 100% */
|
|
val->intval = 100;
|
|
break;
|
|
}
|
|
|
|
ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
|
|
POWER_SUPPLY_PROP_CAPACITY, val);
|
|
if (ret)
|
|
break;
|
|
|
|
if (val->intval > 100) {
|
|
val->intval = 100;
|
|
break;
|
|
}
|
|
if (val->intval < 0)
|
|
val->intval = 0;
|
|
|
|
/* Do not adjust SOC when charging: voltage is overrated */
|
|
if (is_charging(cm))
|
|
break;
|
|
|
|
/*
|
|
* If the capacity value is inconsistent, calibrate it base on
|
|
* the battery voltage values and the thresholds given as desc
|
|
*/
|
|
ret = get_batt_uV(cm, &uV);
|
|
if (ret) {
|
|
/* Voltage information not available. No calibration */
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
|
|
!is_charging(cm)) {
|
|
val->intval = 100;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
if (is_ext_pwr_online(cm))
|
|
val->intval = 1;
|
|
else
|
|
val->intval = 0;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
if (is_full_charged(cm))
|
|
val->intval = 1;
|
|
else
|
|
val->intval = 0;
|
|
ret = 0;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
if (is_charging(cm)) {
|
|
ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
|
|
POWER_SUPPLY_PROP_CHARGE_NOW,
|
|
val);
|
|
if (ret) {
|
|
val->intval = 1;
|
|
ret = 0;
|
|
} else {
|
|
/* If CHARGE_NOW is supplied, use it */
|
|
val->intval = (val->intval > 0) ?
|
|
val->intval : 1;
|
|
}
|
|
} else {
|
|
val->intval = 0;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#define NUM_CHARGER_PSY_OPTIONAL (4)
|
|
static enum power_supply_property default_charger_props[] = {
|
|
/* Guaranteed to provide */
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_HEALTH,
|
|
POWER_SUPPLY_PROP_PRESENT,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_CAPACITY,
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL,
|
|
/*
|
|
* Optional properties are:
|
|
* POWER_SUPPLY_PROP_CHARGE_NOW,
|
|
* POWER_SUPPLY_PROP_CURRENT_NOW,
|
|
* POWER_SUPPLY_PROP_TEMP, and
|
|
* POWER_SUPPLY_PROP_TEMP_AMBIENT,
|
|
*/
|
|
};
|
|
|
|
static struct power_supply psy_default = {
|
|
.name = "battery",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = default_charger_props,
|
|
.num_properties = ARRAY_SIZE(default_charger_props),
|
|
.get_property = charger_get_property,
|
|
};
|
|
|
|
/**
|
|
* cm_setup_timer - For in-suspend monitoring setup wakeup alarm
|
|
* for suspend_again.
|
|
*
|
|
* Returns true if the alarm is set for Charger Manager to use.
|
|
* Returns false if
|
|
* cm_setup_timer fails to set an alarm,
|
|
* cm_setup_timer does not need to set an alarm for Charger Manager,
|
|
* or an alarm previously configured is to be used.
|
|
*/
|
|
static bool cm_setup_timer(void)
|
|
{
|
|
struct charger_manager *cm;
|
|
unsigned int wakeup_ms = UINT_MAX;
|
|
bool ret = false;
|
|
|
|
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;
|
|
if (cm->desc->polling_interval_ms == 0)
|
|
continue;
|
|
CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms);
|
|
}
|
|
|
|
mutex_unlock(&cm_list_mtx);
|
|
|
|
if (wakeup_ms < UINT_MAX && wakeup_ms > 0) {
|
|
pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms);
|
|
if (rtc_dev) {
|
|
struct rtc_wkalrm tmp;
|
|
unsigned long time, now;
|
|
unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000);
|
|
|
|
/*
|
|
* Set alarm with the polling interval (wakeup_ms)
|
|
* except when rtc_wkalarm_save comes first.
|
|
* However, the alarm time should be NOW +
|
|
* CM_RTC_SMALL or later.
|
|
*/
|
|
tmp.enabled = 1;
|
|
rtc_read_time(rtc_dev, &tmp.time);
|
|
rtc_tm_to_time(&tmp.time, &now);
|
|
if (add < CM_RTC_SMALL)
|
|
add = CM_RTC_SMALL;
|
|
time = now + add;
|
|
|
|
ret = true;
|
|
|
|
if (rtc_wkalarm_save.enabled &&
|
|
rtc_wkalarm_save_time &&
|
|
rtc_wkalarm_save_time < time) {
|
|
if (rtc_wkalarm_save_time < now + CM_RTC_SMALL)
|
|
time = now + CM_RTC_SMALL;
|
|
else
|
|
time = rtc_wkalarm_save_time;
|
|
|
|
/* The timer is not appointed by CM */
|
|
ret = false;
|
|
}
|
|
|
|
pr_info("Waking up after %lu secs.\n",
|
|
time - now);
|
|
|
|
rtc_time_to_tm(time, &tmp.time);
|
|
rtc_set_alarm(rtc_dev, &tmp);
|
|
cm_suspend_duration_ms += wakeup_ms;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (rtc_dev)
|
|
rtc_set_alarm(rtc_dev, &rtc_wkalarm_save);
|
|
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
|
|
*
|
|
* Returns true if the system should be suspended again
|
|
* Returns false if the system should be woken up
|
|
*/
|
|
bool cm_suspend_again(void)
|
|
{
|
|
struct charger_manager *cm;
|
|
bool ret = false;
|
|
|
|
if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() ||
|
|
!cm_rtc_set)
|
|
return false;
|
|
|
|
if (cm_monitor())
|
|
goto out;
|
|
|
|
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)) {
|
|
ret = false;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&cm_list_mtx);
|
|
|
|
cm_rtc_set = cm_setup_timer();
|
|
out:
|
|
/* It's about the time when the non-CM appointed timer goes off */
|
|
if (rtc_wkalarm_save.enabled) {
|
|
unsigned long now;
|
|
struct rtc_time tmp;
|
|
|
|
rtc_read_time(rtc_dev, &tmp);
|
|
rtc_tm_to_time(&tmp, &now);
|
|
|
|
if (rtc_wkalarm_save_time &&
|
|
now + CM_RTC_SMALL >= rtc_wkalarm_save_time)
|
|
return false;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cm_suspend_again);
|
|
|
|
/**
|
|
* setup_charger_manager - initialize charger_global_desc data
|
|
* @gd: pointer to instance of charger_global_desc
|
|
*/
|
|
int setup_charger_manager(struct charger_global_desc *gd)
|
|
{
|
|
if (!gd)
|
|
return -EINVAL;
|
|
|
|
if (rtc_dev)
|
|
rtc_class_close(rtc_dev);
|
|
rtc_dev = NULL;
|
|
g_desc = NULL;
|
|
|
|
if (!gd->rtc_only_wakeup) {
|
|
pr_err("The callback rtc_only_wakeup is not given.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (gd->rtc_name) {
|
|
rtc_dev = rtc_class_open(gd->rtc_name);
|
|
if (IS_ERR_OR_NULL(rtc_dev)) {
|
|
rtc_dev = NULL;
|
|
/* Retry at probe. RTC may be not registered yet */
|
|
}
|
|
} else {
|
|
pr_warn("No wakeup timer is given for charger manager."
|
|
"In-suspend monitoring won't work.\n");
|
|
}
|
|
|
|
g_desc = gd;
|
|
return 0;
|
|
}
|
|
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)) {
|
|
if (work_pending(&setup_polling))
|
|
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;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static int charger_manager_probe(struct platform_device *pdev)
|
|
{
|
|
struct charger_desc *desc = dev_get_platdata(&pdev->dev);
|
|
struct charger_manager *cm;
|
|
int ret = 0, i = 0;
|
|
int j = 0;
|
|
int chargers_externally_control = 1;
|
|
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",
|
|
g_desc->rtc_name);
|
|
ret = -ENODEV;
|
|
goto err_alloc;
|
|
}
|
|
}
|
|
|
|
if (!desc) {
|
|
dev_err(&pdev->dev, "No platform data (desc) found.\n");
|
|
ret = -ENODEV;
|
|
goto err_alloc;
|
|
}
|
|
|
|
cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL);
|
|
if (!cm) {
|
|
dev_err(&pdev->dev, "Cannot allocate memory.\n");
|
|
ret = -ENOMEM;
|
|
goto err_alloc;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
memcpy(cm->desc, desc, sizeof(struct charger_desc));
|
|
cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */
|
|
|
|
/*
|
|
* 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.");
|
|
}
|
|
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.");
|
|
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.");
|
|
}
|
|
if (desc->fullbatt_full_capacity == 0) {
|
|
dev_info(&pdev->dev, "Ignoring full-battery full capacity"
|
|
" threshold as it is not supplied.");
|
|
}
|
|
|
|
if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
|
|
ret = -EINVAL;
|
|
dev_err(&pdev->dev, "charger_regulators undefined.\n");
|
|
goto err_no_charger;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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");
|
|
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 {
|
|
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)
|
|
* (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;
|
|
}
|
|
memcpy(cm->charger_psy.properties, default_charger_props,
|
|
sizeof(enum power_supply_property) *
|
|
ARRAY_SIZE(default_charger_props));
|
|
cm->charger_psy.num_properties = psy_default.num_properties;
|
|
|
|
/* Find which optional psy-properties are available */
|
|
if (!cm->fuel_gauge->get_property(cm->fuel_gauge,
|
|
POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
|
|
cm->charger_psy.properties[cm->charger_psy.num_properties] =
|
|
POWER_SUPPLY_PROP_CHARGE_NOW;
|
|
cm->charger_psy.num_properties++;
|
|
}
|
|
if (!cm->fuel_gauge->get_property(cm->fuel_gauge,
|
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
|
&val)) {
|
|
cm->charger_psy.properties[cm->charger_psy.num_properties] =
|
|
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;
|
|
cm->charger_psy.num_properties++;
|
|
} else {
|
|
cm->charger_psy.properties[cm->charger_psy.num_properties] =
|
|
POWER_SUPPLY_PROP_TEMP_AMBIENT;
|
|
cm->charger_psy.num_properties++;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
for (i = 0 ; i < desc->num_charger_regulators ; i++) {
|
|
struct charger_regulator *charger
|
|
= &desc->charger_regulators[i];
|
|
char buf[11];
|
|
char *str;
|
|
|
|
charger->consumer = regulator_get(&pdev->dev,
|
|
charger->regulator_name);
|
|
if (charger->consumer == NULL) {
|
|
dev_err(&pdev->dev, "Cannot find charger(%s)n",
|
|
charger->regulator_name);
|
|
ret = -EINVAL;
|
|
goto err_chg_get;
|
|
}
|
|
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(&pdev->dev, "Cannot find charger(%s)n",
|
|
charger->regulator_name);
|
|
goto err_extcon;
|
|
}
|
|
cable->charger = charger;
|
|
cable->cm = cm;
|
|
}
|
|
|
|
/* Create sysfs entry to control charger(regulator) */
|
|
snprintf(buf, 10, "charger.%d", i);
|
|
str = kzalloc(sizeof(char) * (strlen(buf) + 1), GFP_KERNEL);
|
|
if (!str) {
|
|
for (i--; i >= 0; i--) {
|
|
charger = &desc->charger_regulators[i];
|
|
kfree(charger->attr_g.name);
|
|
}
|
|
ret = -ENOMEM;
|
|
|
|
goto err_extcon;
|
|
}
|
|
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(&pdev->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_info(&pdev->dev, "Cannot create sysfs entry"
|
|
"of %s regulator\n",
|
|
charger->regulator_name);
|
|
}
|
|
}
|
|
|
|
if (chargers_externally_control) {
|
|
dev_err(&pdev->dev, "Cannot register regulator because "
|
|
"charger-manager must need at least "
|
|
"one charger for charging battery\n");
|
|
|
|
ret = -EINVAL;
|
|
goto err_chg_enable;
|
|
}
|
|
|
|
ret = try_charger_enable(cm, true);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Cannot enable charger regulators\n");
|
|
goto err_chg_enable;
|
|
}
|
|
|
|
/* Add to the list */
|
|
mutex_lock(&cm_list_mtx);
|
|
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:
|
|
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);
|
|
kfree(charger->attr_g.name);
|
|
}
|
|
err_extcon:
|
|
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);
|
|
}
|
|
}
|
|
err_chg_get:
|
|
for (i = 0 ; i < desc->num_charger_regulators ; i++)
|
|
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)
|
|
{
|
|
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 (work_pending(&setup_polling))
|
|
cancel_work_sync(&setup_polling);
|
|
if (delayed_work_pending(&cm_monitor_work))
|
|
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);
|
|
|
|
try_charger_enable(cm, false);
|
|
|
|
kfree(cm->charger_psy.properties);
|
|
kfree(cm->charger_stat);
|
|
kfree(cm->desc);
|
|
kfree(cm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id charger_manager_id[] = {
|
|
{ "charger-manager", 0 },
|
|
{ },
|
|
};
|
|
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 charger_manager *cm = dev_get_drvdata(dev);
|
|
|
|
if (!cm_suspended) {
|
|
if (rtc_dev) {
|
|
struct rtc_time tmp;
|
|
unsigned long now;
|
|
|
|
rtc_read_alarm(rtc_dev, &rtc_wkalarm_save);
|
|
rtc_read_time(rtc_dev, &tmp);
|
|
|
|
if (rtc_wkalarm_save.enabled) {
|
|
rtc_tm_to_time(&rtc_wkalarm_save.time,
|
|
&rtc_wkalarm_save_time);
|
|
rtc_tm_to_time(&tmp, &now);
|
|
if (now > rtc_wkalarm_save_time)
|
|
rtc_wkalarm_save_time = 0;
|
|
} else {
|
|
rtc_wkalarm_save_time = 0;
|
|
}
|
|
}
|
|
cm_suspended = true;
|
|
}
|
|
|
|
if (delayed_work_pending(&cm->fullbatt_vchk_work))
|
|
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);
|
|
|
|
if (!cm_rtc_set) {
|
|
cm_suspend_duration_ms = 0;
|
|
cm_rtc_set = cm_setup_timer();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cm_suspend_complete(struct device *dev)
|
|
{
|
|
struct charger_manager *cm = dev_get_drvdata(dev);
|
|
|
|
if (cm_suspended) {
|
|
if (rtc_dev) {
|
|
struct rtc_wkalrm tmp;
|
|
|
|
rtc_read_alarm(rtc_dev, &tmp);
|
|
rtc_wkalarm_save.pending = tmp.pending;
|
|
rtc_set_alarm(rtc_dev, &rtc_wkalarm_save);
|
|
}
|
|
cm_suspended = false;
|
|
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,
|
|
};
|
|
|
|
static struct platform_driver charger_manager_driver = {
|
|
.driver = {
|
|
.name = "charger-manager",
|
|
.owner = THIS_MODULE,
|
|
.pm = &charger_manager_pm,
|
|
},
|
|
.probe = charger_manager_probe,
|
|
.remove = __devexit_p(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");
|