static irqreturn_t pm860x_temp_handler(int irq, void *data)
{
struct power_supply *psy;
struct pm860x_charger_info *info = data;
union power_supply_propval temp;
int value;
int ret;
psy = power_supply_get_by_name(pm860x_supplied_to[0]);
if (!psy)
return IRQ_HANDLED;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
if (ret)
goto out;
value = temp.intval / 10;
mutex_lock(&info->lock);
/* Temperature < -10 C or >40 C, Will not allow charge */
if (value < -10 || value > 40)
info->allowed = 0;
else
info->allowed = 1;
dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
mutex_unlock(&info->lock);
set_charging_fsm(info);
out:
power_supply_put(psy);
return IRQ_HANDLED;
}
static irqreturn_t pm860x_done_handler(int irq, void *data)
{
struct pm860x_charger_info *info = data;
struct power_supply *psy;
union power_supply_propval val;
int ret;
int vbatt;
mutex_lock(&info->lock);
/* pre-charge done, will transimit to fast-charge stage */
if (info->state == FSM_PRECHARGE) {
info->allowed = 1;
goto out;
}
/*
* Fast charge done, delay to read
* the correct status of CHG_DET.
*/
mdelay(5);
info->allowed = 0;
psy = power_supply_get_by_name(pm860x_supplied_to[0]);
if (!psy)
goto out;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&val);
if (ret)
goto out_psy_put;
vbatt = val.intval / 1000;
/*
* CHG_DONE interrupt is faster than CHG_DET interrupt when
* plug in/out usb, So we can not rely on info->online, we
* need check pm8607 status register to check usb is online
* or not, then we can decide it is real charge done
* automatically or it is triggered by usb plug out;
*/
ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
if (ret < 0)
goto out_psy_put;
if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
&val);
out_psy_put:
power_supply_put(psy);
out:
mutex_unlock(&info->lock);
dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
set_charging_fsm(info);
return IRQ_HANDLED;
}
static ssize_t power_supply_show_property(struct device *dev,
struct device_attribute *attr,
char *buf) {
static char *type_text[] = {
"Unknown", "Battery", "UPS", "Mains", "USB",
"USB_DCP", "USB_CDP", "USB_ACA"
};
static char *status_text[] = {
"Unknown", "Charging", "Discharging", "Not charging", "Full"
};
static char *charge_type[] = {
"Unknown", "N/A", "Trickle", "Fast"
};
static char *health_text[] = {
"Unknown", "Good", "Overheat", "Dead", "Over voltage",
"Unspecified failure", "Cold", "Watchdog timer expire",
"Safety timer expire"
};
static char *technology_text[] = {
"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
"LiMn"
};
static char *capacity_level_text[] = {
"Unknown", "Critical", "Low", "Normal", "High", "Full"
};
static char *scope_text[] = {
"Unknown", "System", "Device"
};
ssize_t ret = 0;
struct power_supply *psy = dev_get_drvdata(dev);
const ptrdiff_t off = attr - power_supply_attrs;
union power_supply_propval value;
if (off == POWER_SUPPLY_PROP_TYPE) {
value.intval = psy->desc->type;
} else {
ret = power_supply_get_property(psy, off, &value);
if (ret < 0) {
if (ret == -ENODATA)
dev_dbg(dev, "driver has no data for `%s' property\n",
attr->attr.name);
else if (ret != -ENODEV)
dev_err(dev, "driver failed to report `%s' property: %zd\n",
attr->attr.name, ret);
return ret;
}
}
if (off == POWER_SUPPLY_PROP_STATUS)
return sprintf(buf, "%s\n", status_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
return sprintf(buf, "%s\n", charge_type[value.intval]);
else if (off == POWER_SUPPLY_PROP_HEALTH)
return sprintf(buf, "%s\n", health_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
return sprintf(buf, "%s\n", technology_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_TYPE)
return sprintf(buf, "%s\n", type_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_SCOPE)
return sprintf(buf, "%s\n", scope_text[value.intval]);
else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
return sprintf(buf, "%s\n", value.strval);
return sprintf(buf, "%d\n", value.intval);
}
static int set_charging_fsm(struct pm860x_charger_info *info)
{
struct power_supply *psy;
union power_supply_propval data;
unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
"fastcharge",
};
int ret;
int vbatt;
psy = power_supply_get_by_name(pm860x_supplied_to[0]);
if (!psy)
return -EINVAL;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&data);
if (ret) {
power_supply_put(psy);
return ret;
}
vbatt = data.intval / 1000;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
if (ret) {
power_supply_put(psy);
return ret;
}
power_supply_put(psy);
mutex_lock(&info->lock);
info->present = data.intval;
dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
"Allowed:%d\n",
&fsm_state[info->state][0],
(info->online) ? "online" : "N/A",
(info->present) ? "present" : "N/A", info->allowed);
dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
switch (info->state) {
case FSM_INIT:
if (info->online && info->present && info->allowed) {
if (vbatt < PRECHARGE_THRESHOLD) {
info->state = FSM_PRECHARGE;
start_precharge(info);
} else if (vbatt > DISCHARGE_THRESHOLD) {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
} else if (vbatt < DISCHARGE_THRESHOLD) {
info->state = FSM_FASTCHARGE;
start_fastcharge(info);
}
} else {
if (vbatt < POWEROFF_THRESHOLD) {
power_off_notification(info);
} else {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
}
}
break;
case FSM_PRECHARGE:
if (info->online && info->present && info->allowed) {
if (vbatt > PRECHARGE_THRESHOLD) {
info->state = FSM_FASTCHARGE;
start_fastcharge(info);
}
} else {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
}
break;
case FSM_FASTCHARGE:
if (info->online && info->present && info->allowed) {
if (vbatt < PRECHARGE_THRESHOLD) {
info->state = FSM_PRECHARGE;
start_precharge(info);
}
} else {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
}
break;
case FSM_DISCHARGE:
if (info->online && info->present && info->allowed) {
if (vbatt < PRECHARGE_THRESHOLD) {
info->state = FSM_PRECHARGE;
start_precharge(info);
} else if (vbatt < DISCHARGE_THRESHOLD) {
info->state = FSM_FASTCHARGE;
start_fastcharge(info);
}
} else {
if (vbatt < POWEROFF_THRESHOLD)
power_off_notification(info);
else if (vbatt > CHARGE_THRESHOLD && info->online)
set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
}
break;
default:
dev_warn(info->dev, "FSM meets wrong state:%d\n",
info->state);
break;
}
dev_dbg(info->dev,
"Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
&fsm_state[info->state][0],
(info->online) ? "online" : "N/A",
(info->present) ? "present" : "N/A", info->allowed);
mutex_unlock(&info->lock);
return 0;
}
