static int check_battery_changed(struct twl4030_bci_device_info *di)
{
static int battery_calibration_enabled = 0;
int need_recalibration = 0;
int upper_limit, lower_limit;
if(battery_calibration_enabled) { // Voltage Calibration Complete
start_monitor = 0;
set_end_of_charge(0);
set_charging_timer(0);
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
battery_calibration_enabled = 0;
printk(KERN_INFO "[BATTERY] ReCalibration Done!\n");
return 2;
}
if(di->charge_rsoc == POWER_SUPPLY_TYPE_BATTERY)
return 0;
if(di->battery_present == 0) // Cannot do anything without battery
return 0;
if((di->temp_C < 0 || di->temp_C > 60) && di->temp_control != UNLIMITED_TEMP_VAL){ // 20120725, [email protected], Enable charging by fake mode.
// Ignore when low or high temperature
return 0;
}
// Set Voltage Limit
// TODO : 300 and -250 is tuning value. must be verified.
upper_limit = 300;
lower_limit = -250;
// Check battery changed while phone turned on
if(di->battery_present == 1 &&
di->previous_battery_present == 0) { // Battery Inserted
need_recalibration = 1;
} else {
int voltage_diff;
voltage_diff = di->voltage_uV - di->previous_voltage_uV;
if(voltage_diff > upper_limit) { // too much voltage increase
if(di->previous_charge_rsoc != POWER_SUPPLY_TYPE_BATTERY) {
need_recalibration = 1;
}
} else if(voltage_diff < lower_limit) { // too much voltage drop
need_recalibration = 1;
}
}
if(need_recalibration) {
charging_ic_deactive();
battery_calibration_enabled = 1;
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
printk(KERN_INFO "[BATTERY] Need To Calibration!\n");
printk(KERN_INFO "[BATTERY] %dmV -> %dmV\n", di->previous_voltage_uV, di->voltage_uV);
mdelay(50); // wait for voltage drop - charging ic deactived.
max17043_do_calibrate(); // Fuel Gauge Recalibration takes 1~3 sec.
}
return need_recalibration;
}
static void charging_ic_work_func(struct work_struct *work)
{
printk(KERN_INFO "[charging_msg] %s\n", __FUNCTION__);
if(charging_ic_status != CHARGING_IC_DEACTIVE) {
printk(KERN_INFO "[Battery] Charging IC - EOC\n");
set_end_of_charge(1);
charger_state_update_by_other();
}
if(wake_lock_active(&eoc_handle_lock))
wake_unlock(&eoc_handle_lock);
}
static void charging_ic_work_func(struct work_struct *work)
{
printk(KERN_INFO "[charging_msg] %s\n", __FUNCTION__);
#if defined(CONFIG_PRODUCT_LGE_LU6800)
//20101102 [email protected] To support factory cal to prevent to deactive[START_LGE]
charger_state_update_by_other();
//20101102 [email protected] To support factory cal to prevent to deactive[END_LGE]
#else
if(charging_ic_status != CHARGING_IC_DEACTIVE) {
set_end_of_charge(1);
//charging_ic_deactive();
charger_state_update_by_other();
printk(KERN_INFO "[Battery] Charging IC - EOC\n");
}
#endif
}
static int set_battery_charging(struct twl4030_bci_device_info *di)
{
int trickle_chg_max, trickle_chg_min, trickle_chg_timer_start;
max8922_status chr_ic_status = get_charging_ic_status();
if(di->battery_present == 0 || // No Battery State
di->charge_rsoc == POWER_SUPPLY_TYPE_BATTERY) { // No Charging Source
start_monitor = 0;
set_end_of_charge(0);
set_charging_timer(0);
return 0;
}
/*
* Recharging algorithm
* - High Temperature : up to 4.0V
* - Normal : up to 4.2V
*/
// Set maximum charging voltage
if((di->temp_C < TEMP_CRITICAL_LOWER ||
di->temp_C > TEMP_CRITICAL_UPPER) && // Critical Temperature! Must stop charging
di->temp_control != UNLIMITED_TEMP_VAL){ // 20120725, [email protected], Enable charging by fake mode.
start_monitor = 0;
set_end_of_charge(0);
set_charging_timer(0);
if (di->battery_present == 1)
charging_ic_deactive();
return 0;
} else if(di->temp_C < TEMP_LIMIT_LOWER ||
di->temp_C > TEMP_LIMIT_UPPER) { // Charging Limit
trickle_chg_max = 4000;
trickle_chg_timer_start = 3950;
trickle_chg_min = 3900;
} else { // Normal Charging
trickle_chg_max = 4220; // to unintentional charging stop
trickle_chg_timer_start = 4197;
trickle_chg_min = 4140;
if((di->previous_temp_C < TEMP_LIMIT_LOWER ||
di->previous_temp_C > TEMP_LIMIT_UPPER) &&
di->temp_control != UNLIMITED_TEMP_VAL) { // 20120725, [email protected], Enable charging by fake mode.
start_monitor = 0;
set_end_of_charge(0);
set_charging_timer(0);
}
}
// Deactive charger for protect overcharge & monitoring
if(chr_ic_status != CHARGING_IC_DEACTIVE) {
if(/*di->voltage_uV >= trickle_chg_max ||*/ charging_timeout() || end_of_charge) {
// Battery Full Charged Once. Entering Trickle Charging Mode
if(!charging_timeout()) // Do not stop charging when timeout occured
charging_ic_deactive(); // It's not actually charged full.
set_charging_timer(0);
set_end_of_charge(0);
if(start_monitor == 0) {
printk(KERN_DEBUG "[Battery] Trickle Charging Start!\n");
start_monitor = 1;
}
} else if(di->voltage_uV >= trickle_chg_timer_start) {
set_charging_timer(1);
}
} else if(di->voltage_uV < trickle_chg_min) { // active charger for recharging
switch(di->charge_rsoc) {
case POWER_SUPPLY_TYPE_MAINS:
charging_ic_set_ta_mode();
break;
case POWER_SUPPLY_TYPE_USB:
charging_ic_set_usb_mode();
break;
case POWER_SUPPLY_TYPE_UPS:
charging_ic_set_factory_mode();
break;
default:
break;
}
}
return 0;
}
