695 lines
17 KiB
C
695 lines
17 KiB
C
/*
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* DA9150 Charger Driver
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*
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* Copyright (c) 2014 Dialog Semiconductor
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*
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* Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/interrupt.h>
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#include <linux/power_supply.h>
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#include <linux/notifier.h>
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#include <linux/usb/phy.h>
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#include <linux/iio/consumer.h>
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#include <linux/mfd/da9150/core.h>
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#include <linux/mfd/da9150/registers.h>
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/* Private data */
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struct da9150_charger {
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struct da9150 *da9150;
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struct device *dev;
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struct power_supply *usb;
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struct power_supply *battery;
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struct power_supply *supply_online;
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struct usb_phy *usb_phy;
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struct notifier_block otg_nb;
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struct work_struct otg_work;
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unsigned long usb_event;
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struct iio_channel *ibus_chan;
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struct iio_channel *vbus_chan;
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struct iio_channel *tjunc_chan;
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struct iio_channel *vbat_chan;
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};
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static inline int da9150_charger_supply_online(struct da9150_charger *charger,
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struct power_supply *psy,
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union power_supply_propval *val)
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{
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val->intval = (psy == charger->supply_online) ? 1 : 0;
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return 0;
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}
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/* Charger Properties */
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static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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int v_val, ret;
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/* Read processed value - mV units */
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ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
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if (ret < 0)
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return ret;
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/* Convert voltage to expected uV units */
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val->intval = v_val * 1000;
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return 0;
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}
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static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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int i_val, ret;
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/* Read processed value - mA units */
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ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
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if (ret < 0)
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return ret;
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/* Convert current to expected uA units */
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val->intval = i_val * 1000;
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return 0;
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}
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static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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int t_val, ret;
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/* Read processed value - 0.001 degrees C units */
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ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
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if (ret < 0)
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return ret;
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/* Convert temp to expect 0.1 degrees C units */
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val->intval = t_val / 100;
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return 0;
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}
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static enum power_supply_property da9150_charger_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_AVG,
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POWER_SUPPLY_PROP_TEMP,
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};
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static int da9150_charger_get_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
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int ret;
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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ret = da9150_charger_supply_online(charger, psy, val);
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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ret = da9150_charger_vbus_voltage_now(charger, val);
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break;
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case POWER_SUPPLY_PROP_CURRENT_AVG:
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ret = da9150_charger_ibus_current_avg(charger, val);
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break;
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case POWER_SUPPLY_PROP_TEMP:
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ret = da9150_charger_tjunc_temp(charger, val);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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/* Battery Properties */
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static int da9150_charger_battery_status(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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u8 reg;
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/* Check to see if battery is discharging */
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
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if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
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((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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return 0;
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}
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
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/* Now check for other states */
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switch (reg & DA9150_CHG_STAT_MASK) {
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case DA9150_CHG_STAT_ACT:
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case DA9150_CHG_STAT_PRE:
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case DA9150_CHG_STAT_CC:
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case DA9150_CHG_STAT_CV:
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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break;
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case DA9150_CHG_STAT_OFF:
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case DA9150_CHG_STAT_SUSP:
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case DA9150_CHG_STAT_TEMP:
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case DA9150_CHG_STAT_TIME:
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case DA9150_CHG_STAT_BAT:
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val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
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break;
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case DA9150_CHG_STAT_FULL:
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val->intval = POWER_SUPPLY_STATUS_FULL;
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break;
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default:
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val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
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break;
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}
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return 0;
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}
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static int da9150_charger_battery_health(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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u8 reg;
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
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/* Check if temperature limit reached */
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switch (reg & DA9150_CHG_TEMP_MASK) {
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case DA9150_CHG_TEMP_UNDER:
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val->intval = POWER_SUPPLY_HEALTH_COLD;
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return 0;
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case DA9150_CHG_TEMP_OVER:
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val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
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return 0;
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default:
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break;
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}
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/* Check for other health states */
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switch (reg & DA9150_CHG_STAT_MASK) {
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case DA9150_CHG_STAT_ACT:
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case DA9150_CHG_STAT_PRE:
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val->intval = POWER_SUPPLY_HEALTH_DEAD;
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break;
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case DA9150_CHG_STAT_TIME:
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val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
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break;
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default:
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val->intval = POWER_SUPPLY_HEALTH_GOOD;
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break;
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}
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return 0;
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}
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static int da9150_charger_battery_present(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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u8 reg;
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/* Check if battery present or removed */
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
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if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
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val->intval = 0;
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else
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val->intval = 1;
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return 0;
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}
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static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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u8 reg;
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
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switch (reg & DA9150_CHG_STAT_MASK) {
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case DA9150_CHG_STAT_CC:
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val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
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break;
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case DA9150_CHG_STAT_ACT:
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case DA9150_CHG_STAT_PRE:
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case DA9150_CHG_STAT_CV:
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val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
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break;
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default:
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val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
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break;
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}
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return 0;
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}
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static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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u8 reg;
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reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
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/* Value starts at 2500 mV, 50 mV increments, presented in uV */
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val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
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return 0;
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}
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static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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int v_val, ret;
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/* Read processed value - mV units */
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ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
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if (ret < 0)
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return ret;
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val->intval = v_val * 1000;
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return 0;
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}
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static int da9150_charger_battery_current_max(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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int reg;
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reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
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/* 25mA increments */
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val->intval = reg * 25000;
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return 0;
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}
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static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
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union power_supply_propval *val)
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{
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u8 reg;
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reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
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/* Value starts at 3650 mV, 25 mV increments, presented in uV */
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val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
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return 0;
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}
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static enum power_supply_property da9150_charger_bat_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_CHARGE_TYPE,
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
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};
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static int da9150_charger_battery_get_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
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int ret;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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ret = da9150_charger_battery_status(charger, val);
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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ret = da9150_charger_supply_online(charger, psy, val);
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break;
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case POWER_SUPPLY_PROP_HEALTH:
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ret = da9150_charger_battery_health(charger, val);
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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ret = da9150_charger_battery_present(charger, val);
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break;
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case POWER_SUPPLY_PROP_CHARGE_TYPE:
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ret = da9150_charger_battery_charge_type(charger, val);
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
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ret = da9150_charger_battery_voltage_min(charger, val);
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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ret = da9150_charger_battery_voltage_now(charger, val);
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break;
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
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ret = da9150_charger_battery_current_max(charger, val);
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break;
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
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ret = da9150_charger_battery_voltage_max(charger, val);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
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{
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struct da9150_charger *charger = data;
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power_supply_changed(charger->battery);
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return IRQ_HANDLED;
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}
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static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
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{
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struct da9150_charger *charger = data;
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/* Nothing we can really do except report this. */
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dev_crit(charger->dev, "TJunc over temperature!!!\n");
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power_supply_changed(charger->usb);
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return IRQ_HANDLED;
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}
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static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
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{
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struct da9150_charger *charger = data;
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/* Nothing we can really do except report this. */
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dev_crit(charger->dev, "VSYS under voltage!!!\n");
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power_supply_changed(charger->usb);
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power_supply_changed(charger->battery);
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return IRQ_HANDLED;
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}
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static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
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{
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struct da9150_charger *charger = data;
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u8 reg;
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
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/* Charger plugged in or battery only */
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switch (reg & DA9150_VBUS_STAT_MASK) {
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case DA9150_VBUS_STAT_OFF:
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case DA9150_VBUS_STAT_WAIT:
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charger->supply_online = charger->battery;
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break;
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case DA9150_VBUS_STAT_CHG:
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charger->supply_online = charger->usb;
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break;
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default:
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dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
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reg);
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charger->supply_online = NULL;
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break;
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}
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power_supply_changed(charger->usb);
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power_supply_changed(charger->battery);
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return IRQ_HANDLED;
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}
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static void da9150_charger_otg_work(struct work_struct *data)
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{
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struct da9150_charger *charger =
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container_of(data, struct da9150_charger, otg_work);
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switch (charger->usb_event) {
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case USB_EVENT_ID:
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/* Enable OTG Boost */
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da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
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DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
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break;
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case USB_EVENT_NONE:
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/* Revert to charge mode */
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power_supply_changed(charger->usb);
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power_supply_changed(charger->battery);
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da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
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DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
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break;
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}
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}
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static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
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void *priv)
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{
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struct da9150_charger *charger =
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container_of(nb, struct da9150_charger, otg_nb);
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dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
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charger->usb_event = val;
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schedule_work(&charger->otg_work);
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return NOTIFY_OK;
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}
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static int da9150_charger_register_irq(struct platform_device *pdev,
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irq_handler_t handler,
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const char *irq_name)
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{
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struct device *dev = &pdev->dev;
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struct da9150_charger *charger = platform_get_drvdata(pdev);
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int irq, ret;
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irq = platform_get_irq_byname(pdev, irq_name);
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if (irq < 0) {
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dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
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return irq;
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}
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ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
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charger);
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if (ret)
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dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
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return ret;
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}
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static void da9150_charger_unregister_irq(struct platform_device *pdev,
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const char *irq_name)
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{
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struct device *dev = &pdev->dev;
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struct da9150_charger *charger = platform_get_drvdata(pdev);
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int irq;
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irq = platform_get_irq_byname(pdev, irq_name);
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if (irq < 0) {
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dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
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return;
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}
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free_irq(irq, charger);
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}
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|
|
|
static const struct power_supply_desc usb_desc = {
|
|
.name = "da9150-usb",
|
|
.type = POWER_SUPPLY_TYPE_USB,
|
|
.properties = da9150_charger_props,
|
|
.num_properties = ARRAY_SIZE(da9150_charger_props),
|
|
.get_property = da9150_charger_get_prop,
|
|
};
|
|
|
|
static const struct power_supply_desc battery_desc = {
|
|
.name = "da9150-battery",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = da9150_charger_bat_props,
|
|
.num_properties = ARRAY_SIZE(da9150_charger_bat_props),
|
|
.get_property = da9150_charger_battery_get_prop,
|
|
};
|
|
|
|
static int da9150_charger_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct da9150 *da9150 = dev_get_drvdata(dev->parent);
|
|
struct da9150_charger *charger;
|
|
u8 reg;
|
|
int ret;
|
|
|
|
charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
|
|
if (!charger)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, charger);
|
|
charger->da9150 = da9150;
|
|
charger->dev = dev;
|
|
|
|
/* Acquire ADC channels */
|
|
charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
|
|
if (IS_ERR(charger->ibus_chan)) {
|
|
ret = PTR_ERR(charger->ibus_chan);
|
|
goto ibus_chan_fail;
|
|
}
|
|
|
|
charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
|
|
if (IS_ERR(charger->vbus_chan)) {
|
|
ret = PTR_ERR(charger->vbus_chan);
|
|
goto vbus_chan_fail;
|
|
}
|
|
|
|
charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
|
|
if (IS_ERR(charger->tjunc_chan)) {
|
|
ret = PTR_ERR(charger->tjunc_chan);
|
|
goto tjunc_chan_fail;
|
|
}
|
|
|
|
charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
|
|
if (IS_ERR(charger->vbat_chan)) {
|
|
ret = PTR_ERR(charger->vbat_chan);
|
|
goto vbat_chan_fail;
|
|
}
|
|
|
|
/* Register power supplies */
|
|
charger->usb = power_supply_register(dev, &usb_desc, NULL);
|
|
if (IS_ERR(charger->usb)) {
|
|
ret = PTR_ERR(charger->usb);
|
|
goto usb_fail;
|
|
}
|
|
|
|
charger->battery = power_supply_register(dev, &battery_desc, NULL);
|
|
if (IS_ERR(charger->battery)) {
|
|
ret = PTR_ERR(charger->battery);
|
|
goto battery_fail;
|
|
}
|
|
|
|
/* Get initial online supply */
|
|
reg = da9150_reg_read(da9150, DA9150_STATUS_H);
|
|
|
|
switch (reg & DA9150_VBUS_STAT_MASK) {
|
|
case DA9150_VBUS_STAT_OFF:
|
|
case DA9150_VBUS_STAT_WAIT:
|
|
charger->supply_online = charger->battery;
|
|
break;
|
|
case DA9150_VBUS_STAT_CHG:
|
|
charger->supply_online = charger->usb;
|
|
break;
|
|
default:
|
|
dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
|
|
charger->supply_online = NULL;
|
|
break;
|
|
}
|
|
|
|
/* Setup OTG reporting & configuration */
|
|
charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
|
|
if (!IS_ERR_OR_NULL(charger->usb_phy)) {
|
|
INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
|
|
charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
|
|
usb_register_notifier(charger->usb_phy, &charger->otg_nb);
|
|
}
|
|
|
|
/* Register IRQs */
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
|
|
"CHG_STATUS");
|
|
if (ret < 0)
|
|
goto chg_irq_fail;
|
|
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
|
|
"CHG_TJUNC");
|
|
if (ret < 0)
|
|
goto tjunc_irq_fail;
|
|
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
|
|
"CHG_VFAULT");
|
|
if (ret < 0)
|
|
goto vfault_irq_fail;
|
|
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
|
|
"CHG_VBUS");
|
|
if (ret < 0)
|
|
goto vbus_irq_fail;
|
|
|
|
return 0;
|
|
|
|
|
|
vbus_irq_fail:
|
|
da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
|
|
vfault_irq_fail:
|
|
da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
|
|
tjunc_irq_fail:
|
|
da9150_charger_unregister_irq(pdev, "CHG_STATUS");
|
|
chg_irq_fail:
|
|
if (!IS_ERR_OR_NULL(charger->usb_phy))
|
|
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
|
|
battery_fail:
|
|
power_supply_unregister(charger->usb);
|
|
|
|
usb_fail:
|
|
iio_channel_release(charger->vbat_chan);
|
|
|
|
vbat_chan_fail:
|
|
iio_channel_release(charger->tjunc_chan);
|
|
|
|
tjunc_chan_fail:
|
|
iio_channel_release(charger->vbus_chan);
|
|
|
|
vbus_chan_fail:
|
|
iio_channel_release(charger->ibus_chan);
|
|
|
|
ibus_chan_fail:
|
|
return ret;
|
|
}
|
|
|
|
static int da9150_charger_remove(struct platform_device *pdev)
|
|
{
|
|
struct da9150_charger *charger = platform_get_drvdata(pdev);
|
|
int irq;
|
|
|
|
/* Make sure IRQs are released before unregistering power supplies */
|
|
irq = platform_get_irq_byname(pdev, "CHG_VBUS");
|
|
free_irq(irq, charger);
|
|
|
|
irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
|
|
free_irq(irq, charger);
|
|
|
|
irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
|
|
free_irq(irq, charger);
|
|
|
|
irq = platform_get_irq_byname(pdev, "CHG_STATUS");
|
|
free_irq(irq, charger);
|
|
|
|
if (!IS_ERR_OR_NULL(charger->usb_phy))
|
|
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
|
|
|
|
power_supply_unregister(charger->battery);
|
|
power_supply_unregister(charger->usb);
|
|
|
|
/* Release ADC channels */
|
|
iio_channel_release(charger->ibus_chan);
|
|
iio_channel_release(charger->vbus_chan);
|
|
iio_channel_release(charger->tjunc_chan);
|
|
iio_channel_release(charger->vbat_chan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver da9150_charger_driver = {
|
|
.driver = {
|
|
.name = "da9150-charger",
|
|
},
|
|
.probe = da9150_charger_probe,
|
|
.remove = da9150_charger_remove,
|
|
};
|
|
|
|
module_platform_driver(da9150_charger_driver);
|
|
|
|
MODULE_DESCRIPTION("Charger Driver for DA9150");
|
|
MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
|
|
MODULE_LICENSE("GPL");
|