--- /dev/null
+/*
+ * DA9150 Charger Driver
+ *
+ * Copyright (c) 2014 Dialog Semiconductor
+ *
+ * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/interrupt.h>
+#include <linux/power_supply.h>
+#include <linux/notifier.h>
+#include <linux/usb/phy.h>
+#include <linux/iio/consumer.h>
+#include <linux/mfd/da9150/core.h>
+#include <linux/mfd/da9150/registers.h>
+
+/* Private data */
+struct da9150_charger {
+ struct da9150 *da9150;
+ struct device *dev;
+
+ struct power_supply *usb;
+ struct power_supply *battery;
+ struct power_supply *supply_online;
+
+ struct usb_phy *usb_phy;
+ struct notifier_block otg_nb;
+ struct work_struct otg_work;
+ unsigned long usb_event;
+
+ struct iio_channel *ibus_chan;
+ struct iio_channel *vbus_chan;
+ struct iio_channel *tjunc_chan;
+ struct iio_channel *vbat_chan;
+};
+
+static inline int da9150_charger_supply_online(struct da9150_charger *charger,
+ struct power_supply *psy,
+ union power_supply_propval *val)
+{
+ val->intval = (psy == charger->supply_online) ? 1 : 0;
+
+ return 0;
+}
+
+/* Charger Properties */
+static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ int v_val, ret;
+
+ /* Read processed value - mV units */
+ ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
+ if (ret < 0)
+ return ret;
+
+ /* Convert voltage to expected uV units */
+ val->intval = v_val * 1000;
+
+ return 0;
+}
+
+static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ int i_val, ret;
+
+ /* Read processed value - mA units */
+ ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
+ if (ret < 0)
+ return ret;
+
+ /* Convert current to expected uA units */
+ val->intval = i_val * 1000;
+
+ return 0;
+}
+
+static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ int t_val, ret;
+
+ /* Read processed value - 0.001 degrees C units */
+ ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
+ if (ret < 0)
+ return ret;
+
+ /* Convert temp to expect 0.1 degrees C units */
+ val->intval = t_val / 100;
+
+ return 0;
+}
+
+static enum power_supply_property da9150_charger_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_TEMP,
+};
+
+static int da9150_charger_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = da9150_charger_supply_online(charger, psy, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = da9150_charger_vbus_voltage_now(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ ret = da9150_charger_ibus_current_avg(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = da9150_charger_tjunc_temp(charger, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+/* Battery Properties */
+static int da9150_charger_battery_status(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ u8 reg;
+
+ /* Check to see if battery is discharging */
+ reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
+
+ if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
+ ((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+
+ return 0;
+ }
+
+ reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
+
+ /* Now check for other states */
+ switch (reg & DA9150_CHG_STAT_MASK) {
+ case DA9150_CHG_STAT_ACT:
+ case DA9150_CHG_STAT_PRE:
+ case DA9150_CHG_STAT_CC:
+ case DA9150_CHG_STAT_CV:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case DA9150_CHG_STAT_OFF:
+ case DA9150_CHG_STAT_SUSP:
+ case DA9150_CHG_STAT_TEMP:
+ case DA9150_CHG_STAT_TIME:
+ case DA9150_CHG_STAT_BAT:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case DA9150_CHG_STAT_FULL:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+ }
+
+ return 0;
+}
+
+static int da9150_charger_battery_health(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ u8 reg;
+
+ reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
+
+ /* Check if temperature limit reached */
+ switch (reg & DA9150_CHG_TEMP_MASK) {
+ case DA9150_CHG_TEMP_UNDER:
+ val->intval = POWER_SUPPLY_HEALTH_COLD;
+ return 0;
+ case DA9150_CHG_TEMP_OVER:
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ return 0;
+ default:
+ break;
+ }
+
+ /* Check for other health states */
+ switch (reg & DA9150_CHG_STAT_MASK) {
+ case DA9150_CHG_STAT_ACT:
+ case DA9150_CHG_STAT_PRE:
+ val->intval = POWER_SUPPLY_HEALTH_DEAD;
+ break;
+ case DA9150_CHG_STAT_TIME:
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ }
+
+ return 0;
+}
+
+static int da9150_charger_battery_present(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ u8 reg;
+
+ /* Check if battery present or removed */
+ reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
+ if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
+ val->intval = 0;
+ else
+ val->intval = 1;
+
+ return 0;
+}
+
+static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ u8 reg;
+
+ reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
+
+ switch (reg & DA9150_CHG_STAT_MASK) {
+ case DA9150_CHG_STAT_CC:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ break;
+ case DA9150_CHG_STAT_ACT:
+ case DA9150_CHG_STAT_PRE:
+ case DA9150_CHG_STAT_CV:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ }
+
+ return 0;
+}
+
+static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ u8 reg;
+
+ reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
+
+ /* Value starts at 2500 mV, 50 mV increments, presented in uV */
+ val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
+
+ return 0;
+}
+
+static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ int v_val, ret;
+
+ /* Read processed value - mV units */
+ ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
+ if (ret < 0)
+ return ret;
+
+ val->intval = v_val * 1000;
+
+ return 0;
+}
+
+static int da9150_charger_battery_current_max(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ int reg;
+
+ reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
+
+ /* 25mA increments */
+ val->intval = reg * 25000;
+
+ return 0;
+}
+
+static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
+ union power_supply_propval *val)
+{
+ u8 reg;
+
+ reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
+
+ /* Value starts at 3650 mV, 25 mV increments, presented in uV */
+ val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
+ return 0;
+}
+
+static enum power_supply_property da9150_charger_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+};
+
+static int da9150_charger_battery_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = da9150_charger_battery_status(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = da9150_charger_supply_online(charger, psy, val);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = da9150_charger_battery_health(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ ret = da9150_charger_battery_present(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ ret = da9150_charger_battery_charge_type(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ ret = da9150_charger_battery_voltage_min(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = da9150_charger_battery_voltage_now(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ ret = da9150_charger_battery_current_max(charger, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ ret = da9150_charger_battery_voltage_max(charger, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
+{
+ struct da9150_charger *charger = data;
+
+ power_supply_changed(charger->battery);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
+{
+ struct da9150_charger *charger = data;
+
+ /* Nothing we can really do except report this. */
+ dev_crit(charger->dev, "TJunc over temperature!!!\n");
+ power_supply_changed(charger->usb);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
+{
+ struct da9150_charger *charger = data;
+
+ /* Nothing we can really do except report this. */
+ dev_crit(charger->dev, "VSYS under voltage!!!\n");
+ power_supply_changed(charger->usb);
+ power_supply_changed(charger->battery);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
+{
+ struct da9150_charger *charger = data;
+ u8 reg;
+
+ reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
+
+ /* Charger plugged in or battery only */
+ 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(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
+ reg);
+ charger->supply_online = NULL;
+ break;
+ }
+
+ power_supply_changed(charger->usb);
+ power_supply_changed(charger->battery);
+
+ return IRQ_HANDLED;
+}
+
+static void da9150_charger_otg_work(struct work_struct *data)
+{
+ struct da9150_charger *charger =
+ container_of(data, struct da9150_charger, otg_work);
+
+ switch (charger->usb_event) {
+ case USB_EVENT_ID:
+ /* Enable OTG Boost */
+ da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
+ DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
+ break;
+ case USB_EVENT_NONE:
+ /* Revert to charge mode */
+ power_supply_changed(charger->usb);
+ power_supply_changed(charger->battery);
+ da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
+ DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
+ break;
+ }
+}
+
+static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
+ void *priv)
+{
+ struct da9150_charger *charger =
+ container_of(nb, struct da9150_charger, otg_nb);
+
+ dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
+
+ charger->usb_event = val;
+ schedule_work(&charger->otg_work);
+
+ return NOTIFY_OK;
+}
+
+static int da9150_charger_register_irq(struct platform_device *pdev,
+ irq_handler_t handler,
+ const char *irq_name)
+{
+ struct device *dev = &pdev->dev;
+ struct da9150_charger *charger = platform_get_drvdata(pdev);
+ int irq, ret;
+
+ irq = platform_get_irq_byname(pdev, irq_name);
+ if (irq < 0) {
+ dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
+ return irq;
+ }
+
+ ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
+ charger);
+ if (ret)
+ dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
+
+ return ret;
+}
+
+static void da9150_charger_unregister_irq(struct platform_device *pdev,
+ const char *irq_name)
+{
+ struct device *dev = &pdev->dev;
+ struct da9150_charger *charger = platform_get_drvdata(pdev);
+ int irq;
+
+ irq = platform_get_irq_byname(pdev, irq_name);
+ if (irq < 0) {
+ dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
+ return;
+ }
+
+ free_irq(irq, charger);
+}
+
+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");
Code Review / kvmfornfv.git / blobdiff