--- /dev/null
+/*
+ * intel_mid_battery.c - Intel MID PMIC Battery Driver
+ *
+ * Copyright (C) 2009 Intel Corporation
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * Author: Nithish Mahalingam <nithish.mahalingam@intel.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/jiffies.h>
+#include <linux/param.h>
+#include <linux/device.h>
+#include <linux/spi/spi.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <asm/intel_scu_ipc.h>
+
+#define DRIVER_NAME "pmic_battery"
+
+/*********************************************************************
+ * Generic defines
+ *********************************************************************/
+
+static int debug;
+module_param(debug, int, 0444);
+MODULE_PARM_DESC(debug, "Flag to enable PMIC Battery debug messages.");
+
+#define PMIC_BATT_DRV_INFO_UPDATED 1
+#define PMIC_BATT_PRESENT 1
+#define PMIC_BATT_NOT_PRESENT 0
+#define PMIC_USB_PRESENT PMIC_BATT_PRESENT
+#define PMIC_USB_NOT_PRESENT PMIC_BATT_NOT_PRESENT
+
+/* pmic battery register related */
+#define PMIC_BATT_CHR_SCHRGINT_ADDR 0xD2
+#define PMIC_BATT_CHR_SBATOVP_MASK (1 << 1)
+#define PMIC_BATT_CHR_STEMP_MASK (1 << 2)
+#define PMIC_BATT_CHR_SCOMP_MASK (1 << 3)
+#define PMIC_BATT_CHR_SUSBDET_MASK (1 << 4)
+#define PMIC_BATT_CHR_SBATDET_MASK (1 << 5)
+#define PMIC_BATT_CHR_SDCLMT_MASK (1 << 6)
+#define PMIC_BATT_CHR_SUSBOVP_MASK (1 << 7)
+#define PMIC_BATT_CHR_EXCPT_MASK 0xC6
+#define PMIC_BATT_ADC_ACCCHRG_MASK (1 << 31)
+#define PMIC_BATT_ADC_ACCCHRGVAL_MASK 0x7FFFFFFF
+
+/* pmic ipc related */
+#define PMIC_BATT_CHR_IPC_FCHRG_SUBID 0x4
+#define PMIC_BATT_CHR_IPC_TCHRG_SUBID 0x6
+
+/* types of battery charging */
+enum batt_charge_type {
+ BATT_USBOTG_500MA_CHARGE,
+ BATT_USBOTG_TRICKLE_CHARGE,
+};
+
+/* valid battery events */
+enum batt_event {
+ BATT_EVENT_BATOVP_EXCPT,
+ BATT_EVENT_USBOVP_EXCPT,
+ BATT_EVENT_TEMP_EXCPT,
+ BATT_EVENT_DCLMT_EXCPT,
+ BATT_EVENT_EXCPT
+};
+
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+
+/*
+ * pmic battery info
+ */
+struct pmic_power_module_info {
+ bool is_dev_info_updated;
+ struct device *dev;
+ /* pmic battery data */
+ unsigned long update_time; /* jiffies when data read */
+ unsigned int usb_is_present;
+ unsigned int batt_is_present;
+ unsigned int batt_health;
+ unsigned int usb_health;
+ unsigned int batt_status;
+ unsigned int batt_charge_now; /* in mAS */
+ unsigned int batt_prev_charge_full; /* in mAS */
+ unsigned int batt_charge_rate; /* in units per second */
+
+ struct power_supply usb;
+ struct power_supply batt;
+ int irq; /* GPE_ID or IRQ# */
+ struct workqueue_struct *monitor_wqueue;
+ struct delayed_work monitor_battery;
+ struct work_struct handler;
+};
+
+static unsigned int delay_time = 2000; /* in ms */
+
+/*
+ * pmic ac properties
+ */
+static enum power_supply_property pmic_usb_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+};
+
+/*
+ * pmic battery properties
+ */
+static enum power_supply_property pmic_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+};
+
+
+/*
+ * Glue functions for talking to the IPC
+ */
+
+struct battery_property {
+ u32 capacity; /* Charger capacity */
+ u8 crnt; /* Quick charge current value*/
+ u8 volt; /* Fine adjustment of constant charge voltage */
+ u8 prot; /* CHRGPROT register value */
+ u8 prot2; /* CHRGPROT1 register value */
+ u8 timer; /* Charging timer */
+};
+
+#define IPCMSG_BATTERY 0xEF
+
+/* Battery coulomb counter accumulator commands */
+#define IPC_CMD_CC_WR 0 /* Update coulomb counter value */
+#define IPC_CMD_CC_RD 1 /* Read coulomb counter value */
+#define IPC_CMD_BATTERY_PROPERTY 2 /* Read Battery property */
+
+/**
+ * pmic_scu_ipc_battery_cc_read - read battery cc
+ * @value: battery coulomb counter read
+ *
+ * Reads the battery couloumb counter value, returns 0 on success, or
+ * an error code
+ *
+ * This function may sleep. Locking for SCU accesses is handled for
+ * the caller.
+ */
+static int pmic_scu_ipc_battery_cc_read(u32 *value)
+{
+ return intel_scu_ipc_command(IPCMSG_BATTERY, IPC_CMD_CC_RD,
+ NULL, 0, value, 1);
+}
+
+/**
+ * pmic_scu_ipc_battery_property_get - fetch properties
+ * @prop: battery properties
+ *
+ * Retrieve the battery properties from the power management
+ *
+ * This function may sleep. Locking for SCU accesses is handled for
+ * the caller.
+ */
+static int pmic_scu_ipc_battery_property_get(struct battery_property *prop)
+{
+ u32 data[3];
+ u8 *p = (u8 *)&data[1];
+ int err = intel_scu_ipc_command(IPC_CMD_BATTERY_PROPERTY,
+ IPCMSG_BATTERY, NULL, 0, data, 3);
+
+ prop->capacity = data[0];
+ prop->crnt = *p++;
+ prop->volt = *p++;
+ prop->prot = *p++;
+ prop->prot2 = *p++;
+ prop->timer = *p++;
+
+ return err;
+}
+
+/**
+ * pmic_scu_ipc_set_charger - set charger
+ * @charger: charger to select
+ *
+ * Switch the charging mode for the SCU
+ */
+
+static int pmic_scu_ipc_set_charger(int charger)
+{
+ return intel_scu_ipc_simple_command(charger, IPCMSG_BATTERY);
+}
+
+/**
+ * pmic_battery_log_event - log battery events
+ * @event: battery event to be logged
+ * Context: can sleep
+ *
+ * There are multiple battery events which may be of interest to users;
+ * this battery function logs the different battery events onto the
+ * kernel log messages.
+ */
+static void pmic_battery_log_event(enum batt_event event)
+{
+ printk(KERN_WARNING "pmic-battery: ");
+ switch (event) {
+ case BATT_EVENT_BATOVP_EXCPT:
+ printk(KERN_CONT "battery overvoltage condition\n");
+ break;
+ case BATT_EVENT_USBOVP_EXCPT:
+ printk(KERN_CONT "usb charger overvoltage condition\n");
+ break;
+ case BATT_EVENT_TEMP_EXCPT:
+ printk(KERN_CONT "high battery temperature condition\n");
+ break;
+ case BATT_EVENT_DCLMT_EXCPT:
+ printk(KERN_CONT "over battery charge current condition\n");
+ break;
+ default:
+ printk(KERN_CONT "charger/battery exception %d\n", event);
+ break;
+ }
+}
+
+/**
+ * pmic_battery_read_status - read battery status information
+ * @pbi: device info structure to update the read information
+ * Context: can sleep
+ *
+ * PMIC power source information need to be updated based on the data read
+ * from the PMIC battery registers.
+ *
+ */
+static void pmic_battery_read_status(struct pmic_power_module_info *pbi)
+{
+ unsigned int update_time_intrvl;
+ unsigned int chrg_val;
+ u32 ccval;
+ u8 r8;
+ struct battery_property batt_prop;
+ int batt_present = 0;
+ int usb_present = 0;
+ int batt_exception = 0;
+
+ /* make sure the last batt_status read happened delay_time before */
+ if (pbi->update_time && time_before(jiffies, pbi->update_time +
+ msecs_to_jiffies(delay_time)))
+ return;
+
+ update_time_intrvl = jiffies_to_msecs(jiffies - pbi->update_time);
+ pbi->update_time = jiffies;
+
+ /* read coulomb counter registers and schrgint register */
+ if (pmic_scu_ipc_battery_cc_read(&ccval)) {
+ dev_warn(pbi->dev, "%s(): ipc config cmd failed\n",
+ __func__);
+ return;
+ }
+
+ if (intel_scu_ipc_ioread8(PMIC_BATT_CHR_SCHRGINT_ADDR, &r8)) {
+ dev_warn(pbi->dev, "%s(): ipc pmic read failed\n",
+ __func__);
+ return;
+ }
+
+ /*
+ * set pmic_power_module_info members based on pmic register values
+ * read.
+ */
+
+ /* set batt_is_present */
+ if (r8 & PMIC_BATT_CHR_SBATDET_MASK) {
+ pbi->batt_is_present = PMIC_BATT_PRESENT;
+ batt_present = 1;
+ } else {
+ pbi->batt_is_present = PMIC_BATT_NOT_PRESENT;
+ pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ pbi->batt_status = POWER_SUPPLY_STATUS_UNKNOWN;
+ }
+
+ /* set batt_health */
+ if (batt_present) {
+ if (r8 & PMIC_BATT_CHR_SBATOVP_MASK) {
+ pbi->batt_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ pmic_battery_log_event(BATT_EVENT_BATOVP_EXCPT);
+ batt_exception = 1;
+ } else if (r8 & PMIC_BATT_CHR_SDCLMT_MASK) {
+ pbi->batt_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ pmic_battery_log_event(BATT_EVENT_DCLMT_EXCPT);
+ batt_exception = 1;
+ } else if (r8 & PMIC_BATT_CHR_STEMP_MASK) {
+ pbi->batt_health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ pmic_battery_log_event(BATT_EVENT_TEMP_EXCPT);
+ batt_exception = 1;
+ } else {
+ pbi->batt_health = POWER_SUPPLY_HEALTH_GOOD;
+ }
+ }
+
+ /* set usb_is_present */
+ if (r8 & PMIC_BATT_CHR_SUSBDET_MASK) {
+ pbi->usb_is_present = PMIC_USB_PRESENT;
+ usb_present = 1;
+ } else {
+ pbi->usb_is_present = PMIC_USB_NOT_PRESENT;
+ pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ }
+
+ if (usb_present) {
+ if (r8 & PMIC_BATT_CHR_SUSBOVP_MASK) {
+ pbi->usb_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ pmic_battery_log_event(BATT_EVENT_USBOVP_EXCPT);
+ } else {
+ pbi->usb_health = POWER_SUPPLY_HEALTH_GOOD;
+ }
+ }
+
+ chrg_val = ccval & PMIC_BATT_ADC_ACCCHRGVAL_MASK;
+
+ /* set batt_prev_charge_full to battery capacity the first time */
+ if (!pbi->is_dev_info_updated) {
+ if (pmic_scu_ipc_battery_property_get(&batt_prop)) {
+ dev_warn(pbi->dev, "%s(): ipc config cmd failed\n",
+ __func__);
+ return;
+ }
+ pbi->batt_prev_charge_full = batt_prop.capacity;
+ }
+
+ /* set batt_status */
+ if (batt_present && !batt_exception) {
+ if (r8 & PMIC_BATT_CHR_SCOMP_MASK) {
+ pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
+ pbi->batt_prev_charge_full = chrg_val;
+ } else if (ccval & PMIC_BATT_ADC_ACCCHRG_MASK) {
+ pbi->batt_status = POWER_SUPPLY_STATUS_DISCHARGING;
+ } else {
+ pbi->batt_status = POWER_SUPPLY_STATUS_CHARGING;
+ }
+ }
+
+ /* set batt_charge_rate */
+ if (pbi->is_dev_info_updated && batt_present && !batt_exception) {
+ if (pbi->batt_status == POWER_SUPPLY_STATUS_DISCHARGING) {
+ if (pbi->batt_charge_now - chrg_val) {
+ pbi->batt_charge_rate = ((pbi->batt_charge_now -
+ chrg_val) * 1000 * 60) /
+ update_time_intrvl;
+ }
+ } else if (pbi->batt_status == POWER_SUPPLY_STATUS_CHARGING) {
+ if (chrg_val - pbi->batt_charge_now) {
+ pbi->batt_charge_rate = ((chrg_val -
+ pbi->batt_charge_now) * 1000 * 60) /
+ update_time_intrvl;
+ }
+ } else
+ pbi->batt_charge_rate = 0;
+ } else {
+ pbi->batt_charge_rate = -1;
+ }
+
+ /* batt_charge_now */
+ if (batt_present && !batt_exception)
+ pbi->batt_charge_now = chrg_val;
+ else
+ pbi->batt_charge_now = -1;
+
+ pbi->is_dev_info_updated = PMIC_BATT_DRV_INFO_UPDATED;
+}
+
+/**
+ * pmic_usb_get_property - usb power source get property
+ * @psy: usb power supply context
+ * @psp: usb power source property
+ * @val: usb power source property value
+ * Context: can sleep
+ *
+ * PMIC usb power source property needs to be provided to power_supply
+ * subsytem for it to provide the information to users.
+ */
+static int pmic_usb_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pmic_power_module_info *pbi = container_of(psy,
+ struct pmic_power_module_info, usb);
+
+ /* update pmic_power_module_info members */
+ pmic_battery_read_status(pbi);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = pbi->usb_is_present;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = pbi->usb_health;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static inline unsigned long mAStouAh(unsigned long v)
+{
+ /* seconds to hours, mA to µA */
+ return (v * 1000) / 3600;
+}
+
+/**
+ * pmic_battery_get_property - battery power source get property
+ * @psy: battery power supply context
+ * @psp: battery power source property
+ * @val: battery power source property value
+ * Context: can sleep
+ *
+ * PMIC battery power source property needs to be provided to power_supply
+ * subsytem for it to provide the information to users.
+ */
+static int pmic_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pmic_power_module_info *pbi = container_of(psy,
+ struct pmic_power_module_info, batt);
+
+ /* update pmic_power_module_info members */
+ pmic_battery_read_status(pbi);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = pbi->batt_status;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = pbi->batt_health;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = pbi->batt_is_present;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ val->intval = mAStouAh(pbi->batt_charge_now);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ val->intval = mAStouAh(pbi->batt_prev_charge_full);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * pmic_battery_monitor - monitor battery status
+ * @work: work structure
+ * Context: can sleep
+ *
+ * PMIC battery status needs to be monitored for any change
+ * and information needs to be frequently updated.
+ */
+static void pmic_battery_monitor(struct work_struct *work)
+{
+ struct pmic_power_module_info *pbi = container_of(work,
+ struct pmic_power_module_info, monitor_battery.work);
+
+ /* update pmic_power_module_info members */
+ pmic_battery_read_status(pbi);
+ queue_delayed_work(pbi->monitor_wqueue, &pbi->monitor_battery, HZ * 10);
+}
+
+/**
+ * pmic_battery_set_charger - set battery charger
+ * @pbi: device info structure
+ * @chrg: charge mode to set battery charger in
+ * Context: can sleep
+ *
+ * PMIC battery charger needs to be enabled based on the usb charge
+ * capabilities connected to the platform.
+ */
+static int pmic_battery_set_charger(struct pmic_power_module_info *pbi,
+ enum batt_charge_type chrg)
+{
+ int retval;
+
+ /* set usblmt bits and chrgcntl register bits appropriately */
+ switch (chrg) {
+ case BATT_USBOTG_500MA_CHARGE:
+ retval = pmic_scu_ipc_set_charger(PMIC_BATT_CHR_IPC_FCHRG_SUBID);
+ break;
+ case BATT_USBOTG_TRICKLE_CHARGE:
+ retval = pmic_scu_ipc_set_charger(PMIC_BATT_CHR_IPC_TCHRG_SUBID);
+ break;
+ default:
+ dev_warn(pbi->dev, "%s(): out of range usb charger "
+ "charge detected\n", __func__);
+ return -EINVAL;
+ }
+
+ if (retval) {
+ dev_warn(pbi->dev, "%s(): ipc pmic read failed\n",
+ __func__);
+ return retval;;
+ }
+
+ return 0;
+}
+
+/**
+ * pmic_battery_interrupt_handler - pmic battery interrupt handler
+ * Context: interrupt context
+ *
+ * PMIC battery interrupt handler which will be called with either
+ * battery full condition occurs or usb otg & battery connect
+ * condition occurs.
+ */
+static irqreturn_t pmic_battery_interrupt_handler(int id, void *dev)
+{
+ struct pmic_power_module_info *pbi = dev;
+
+ schedule_work(&pbi->handler);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * pmic_battery_handle_intrpt - pmic battery service interrupt
+ * @work: work structure
+ * Context: can sleep
+ *
+ * PMIC battery needs to either update the battery status as full
+ * if it detects battery full condition caused the interrupt or needs
+ * to enable battery charger if it detects usb and battery detect
+ * caused the source of interrupt.
+ */
+static void pmic_battery_handle_intrpt(struct work_struct *work)
+{
+ struct pmic_power_module_info *pbi = container_of(work,
+ struct pmic_power_module_info, handler);
+ enum batt_charge_type chrg;
+ u8 r8;
+
+ if (intel_scu_ipc_ioread8(PMIC_BATT_CHR_SCHRGINT_ADDR, &r8)) {
+ dev_warn(pbi->dev, "%s(): ipc pmic read failed\n",
+ __func__);
+ return;
+ }
+ /* find the cause of the interrupt */
+ if (r8 & PMIC_BATT_CHR_SBATDET_MASK) {
+ pbi->batt_is_present = PMIC_BATT_PRESENT;
+ } else {
+ pbi->batt_is_present = PMIC_BATT_NOT_PRESENT;
+ pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ pbi->batt_status = POWER_SUPPLY_STATUS_UNKNOWN;
+ return;
+ }
+
+ if (r8 & PMIC_BATT_CHR_EXCPT_MASK) {
+ pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ pmic_battery_log_event(BATT_EVENT_EXCPT);
+ return;
+ } else {
+ pbi->batt_health = POWER_SUPPLY_HEALTH_GOOD;
+ pbi->usb_health = POWER_SUPPLY_HEALTH_GOOD;
+ }
+
+ if (r8 & PMIC_BATT_CHR_SCOMP_MASK) {
+ u32 ccval;
+ pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
+
+ if (pmic_scu_ipc_battery_cc_read(&ccval)) {
+ dev_warn(pbi->dev, "%s(): ipc config cmd "
+ "failed\n", __func__);
+ return;
+ }
+ pbi->batt_prev_charge_full = ccval &
+ PMIC_BATT_ADC_ACCCHRGVAL_MASK;
+ return;
+ }
+
+ if (r8 & PMIC_BATT_CHR_SUSBDET_MASK) {
+ pbi->usb_is_present = PMIC_USB_PRESENT;
+ } else {
+ pbi->usb_is_present = PMIC_USB_NOT_PRESENT;
+ pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ return;
+ }
+
+ /* setup battery charging */
+
+#if 0
+ /* check usb otg power capability and set charger accordingly */
+ retval = langwell_udc_maxpower(&power);
+ if (retval) {
+ dev_warn(pbi->dev,
+ "%s(): usb otg power query failed with error code %d\n",
+ __func__, retval);
+ return;
+ }
+
+ if (power >= 500)
+ chrg = BATT_USBOTG_500MA_CHARGE;
+ else
+#endif
+ chrg = BATT_USBOTG_TRICKLE_CHARGE;
+
+ /* enable battery charging */
+ if (pmic_battery_set_charger(pbi, chrg)) {
+ dev_warn(pbi->dev,
+ "%s(): failed to set up battery charging\n", __func__);
+ return;
+ }
+
+ dev_dbg(pbi->dev,
+ "pmic-battery: %s() - setting up battery charger successful\n",
+ __func__);
+}
+
+/**
+ * pmic_battery_probe - pmic battery initialize
+ * @irq: pmic battery device irq
+ * @dev: pmic battery device structure
+ * Context: can sleep
+ *
+ * PMIC battery initializes its internal data structue and other
+ * infrastructure components for it to work as expected.
+ */
+static __devinit int probe(int irq, struct device *dev)
+{
+ int retval = 0;
+ struct pmic_power_module_info *pbi;
+
+ dev_dbg(dev, "pmic-battery: found pmic battery device\n");
+
+ pbi = kzalloc(sizeof(*pbi), GFP_KERNEL);
+ if (!pbi) {
+ dev_err(dev, "%s(): memory allocation failed\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ pbi->dev = dev;
+ pbi->irq = irq;
+ dev_set_drvdata(dev, pbi);
+
+ /* initialize all required framework before enabling interrupts */
+ INIT_WORK(&pbi->handler, pmic_battery_handle_intrpt);
+ INIT_DELAYED_WORK(&pbi->monitor_battery, pmic_battery_monitor);
+ pbi->monitor_wqueue =
+ create_singlethread_workqueue(dev_name(dev));
+ if (!pbi->monitor_wqueue) {
+ dev_err(dev, "%s(): wqueue init failed\n", __func__);
+ retval = -ESRCH;
+ goto wqueue_failed;
+ }
+
+ /* register interrupt */
+ retval = request_irq(pbi->irq, pmic_battery_interrupt_handler,
+ 0, DRIVER_NAME, pbi);
+ if (retval) {
+ dev_err(dev, "%s(): cannot get IRQ\n", __func__);
+ goto requestirq_failed;
+ }
+
+ /* register pmic-batt with power supply subsystem */
+ pbi->batt.name = "pmic-batt";
+ pbi->batt.type = POWER_SUPPLY_TYPE_BATTERY;
+ pbi->batt.properties = pmic_battery_props;
+ pbi->batt.num_properties = ARRAY_SIZE(pmic_battery_props);
+ pbi->batt.get_property = pmic_battery_get_property;
+ retval = power_supply_register(dev, &pbi->batt);
+ if (retval) {
+ dev_err(dev,
+ "%s(): failed to register pmic battery device with power supply subsystem\n",
+ __func__);
+ goto power_reg_failed;
+ }
+
+ dev_dbg(dev, "pmic-battery: %s() - pmic battery device "
+ "registration with power supply subsystem successful\n",
+ __func__);
+
+ queue_delayed_work(pbi->monitor_wqueue, &pbi->monitor_battery, HZ * 1);
+
+ /* register pmic-usb with power supply subsystem */
+ pbi->usb.name = "pmic-usb";
+ pbi->usb.type = POWER_SUPPLY_TYPE_USB;
+ pbi->usb.properties = pmic_usb_props;
+ pbi->usb.num_properties = ARRAY_SIZE(pmic_usb_props);
+ pbi->usb.get_property = pmic_usb_get_property;
+ retval = power_supply_register(dev, &pbi->usb);
+ if (retval) {
+ dev_err(dev,
+ "%s(): failed to register pmic usb device with power supply subsystem\n",
+ __func__);
+ goto power_reg_failed_1;
+ }
+
+ if (debug)
+ printk(KERN_INFO "pmic-battery: %s() - pmic usb device "
+ "registration with power supply subsystem successful\n",
+ __func__);
+
+ return retval;
+
+power_reg_failed_1:
+ power_supply_unregister(&pbi->batt);
+power_reg_failed:
+ cancel_rearming_delayed_workqueue(pbi->monitor_wqueue,
+ &pbi->monitor_battery);
+requestirq_failed:
+ destroy_workqueue(pbi->monitor_wqueue);
+wqueue_failed:
+ kfree(pbi);
+
+ return retval;
+}
+
+static int __devinit platform_pmic_battery_probe(struct platform_device *pdev)
+{
+ return probe(pdev->id, &pdev->dev);
+}
+
+/**
+ * pmic_battery_remove - pmic battery finalize
+ * @dev: pmic battery device structure
+ * Context: can sleep
+ *
+ * PMIC battery finalizes its internal data structue and other
+ * infrastructure components that it initialized in
+ * pmic_battery_probe.
+ */
+
+static int __devexit platform_pmic_battery_remove(struct platform_device *pdev)
+{
+ struct pmic_power_module_info *pbi = dev_get_drvdata(&pdev->dev);
+
+ free_irq(pbi->irq, pbi);
+ cancel_rearming_delayed_workqueue(pbi->monitor_wqueue,
+ &pbi->monitor_battery);
+ destroy_workqueue(pbi->monitor_wqueue);
+
+ power_supply_unregister(&pbi->usb);
+ power_supply_unregister(&pbi->batt);
+
+ flush_scheduled_work();
+ kfree(pbi);
+ return 0;
+}
+
+static struct platform_driver platform_pmic_battery_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = platform_pmic_battery_probe,
+ .remove = __devexit_p(platform_pmic_battery_remove),
+};
+
+static int __init platform_pmic_battery_module_init(void)
+{
+ return platform_driver_register(&platform_pmic_battery_driver);
+}
+
+static void __exit platform_pmic_battery_module_exit(void)
+{
+ platform_driver_unregister(&platform_pmic_battery_driver);
+}
+
+module_init(platform_pmic_battery_module_init);
+module_exit(platform_pmic_battery_module_exit);
+
+MODULE_AUTHOR("Nithish Mahalingam <nithish.mahalingam@intel.com>");
+MODULE_DESCRIPTION("Intel Moorestown PMIC Battery Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * iPAQ h1930/h1940/rx1950 battery controler driver
+ * Copyright (c) Vasily Khoruzhick
+ * Based on h1940_battery.c by Arnaud Patard
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/leds.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/s3c_adc_battery.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+
+#include <plat/adc.h>
+
+#define BAT_POLL_INTERVAL 10000 /* ms */
+#define JITTER_DELAY 500 /* ms */
+
+struct s3c_adc_bat {
+ struct power_supply psy;
+ struct s3c_adc_client *client;
+ struct s3c_adc_bat_pdata *pdata;
+ int volt_value;
+ int cur_value;
+ unsigned int timestamp;
+ int level;
+ int status;
+ int cable_plugged:1;
+};
+
+static struct delayed_work bat_work;
+
+static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
+{
+ schedule_delayed_work(&bat_work,
+ msecs_to_jiffies(JITTER_DELAY));
+}
+
+static enum power_supply_property s3c_adc_backup_bat_props[] = {
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+};
+
+static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
+
+ if (!bat) {
+ dev_err(psy->dev, "%s: no battery infos ?!\n", __func__);
+ return -EINVAL;
+ }
+
+ if (bat->volt_value < 0 ||
+ jiffies_to_msecs(jiffies - bat->timestamp) >
+ BAT_POLL_INTERVAL) {
+ bat->volt_value = s3c_adc_read(bat->client,
+ bat->pdata->backup_volt_channel);
+ bat->volt_value *= bat->pdata->backup_volt_mult;
+ bat->timestamp = jiffies;
+ }
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = bat->volt_value;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ val->intval = bat->pdata->backup_volt_min;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = bat->pdata->backup_volt_max;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct s3c_adc_bat backup_bat = {
+ .psy = {
+ .name = "backup-battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = s3c_adc_backup_bat_props,
+ .num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props),
+ .get_property = s3c_adc_backup_bat_get_property,
+ .use_for_apm = 1,
+ },
+};
+
+static enum power_supply_property s3c_adc_main_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+};
+
+static int calc_full_volt(int volt_val, int cur_val, int impedance)
+{
+ return volt_val + cur_val * impedance / 1000;
+}
+
+static int s3c_adc_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
+
+ int new_level;
+ int full_volt;
+ const struct s3c_adc_bat_thresh *lut = bat->pdata->lut_noac;
+ unsigned int lut_size = bat->pdata->lut_noac_cnt;
+
+ if (!bat) {
+ dev_err(psy->dev, "no battery infos ?!\n");
+ return -EINVAL;
+ }
+
+ if (bat->volt_value < 0 || bat->cur_value < 0 ||
+ jiffies_to_msecs(jiffies - bat->timestamp) >
+ BAT_POLL_INTERVAL) {
+ bat->volt_value = s3c_adc_read(bat->client,
+ bat->pdata->volt_channel) * bat->pdata->volt_mult;
+ bat->cur_value = s3c_adc_read(bat->client,
+ bat->pdata->current_channel) * bat->pdata->current_mult;
+ bat->timestamp = jiffies;
+ }
+
+ if (bat->cable_plugged &&
+ ((bat->pdata->gpio_charge_finished < 0) ||
+ !gpio_get_value(bat->pdata->gpio_charge_finished))) {
+ lut = bat->pdata->lut_acin;
+ lut_size = bat->pdata->lut_acin_cnt;
+ }
+
+ new_level = 100000;
+ full_volt = calc_full_volt((bat->volt_value / 1000),
+ (bat->cur_value / 1000), bat->pdata->internal_impedance);
+
+ if (full_volt < calc_full_volt(lut->volt, lut->cur,
+ bat->pdata->internal_impedance)) {
+ lut_size--;
+ while (lut_size--) {
+ int lut_volt1;
+ int lut_volt2;
+
+ lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur,
+ bat->pdata->internal_impedance);
+ lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur,
+ bat->pdata->internal_impedance);
+ if (full_volt < lut_volt1 && full_volt >= lut_volt2) {
+ new_level = (lut[1].level +
+ (lut[0].level - lut[1].level) *
+ (full_volt - lut_volt2) /
+ (lut_volt1 - lut_volt2)) * 1000;
+ break;
+ }
+ new_level = lut[1].level * 1000;
+ lut++;
+ }
+ }
+
+ bat->level = new_level;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (bat->pdata->gpio_charge_finished < 0)
+ val->intval = bat->level == 100000 ?
+ POWER_SUPPLY_STATUS_FULL : bat->status;
+ else
+ val->intval = bat->status;
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = 100000;
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
+ val->intval = 0;
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ val->intval = bat->level;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = bat->volt_value;
+ return 0;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ val->intval = bat->cur_value;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct s3c_adc_bat main_bat = {
+ .psy = {
+ .name = "main-battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = s3c_adc_main_bat_props,
+ .num_properties = ARRAY_SIZE(s3c_adc_main_bat_props),
+ .get_property = s3c_adc_bat_get_property,
+ .external_power_changed = s3c_adc_bat_ext_power_changed,
+ .use_for_apm = 1,
+ },
+};
+
+static void s3c_adc_bat_work(struct work_struct *work)
+{
+ struct s3c_adc_bat *bat = &main_bat;
+ int is_charged;
+ int is_plugged;
+ static int was_plugged;
+
+ is_plugged = power_supply_am_i_supplied(&bat->psy);
+ bat->cable_plugged = is_plugged;
+ if (is_plugged != was_plugged) {
+ was_plugged = is_plugged;
+ if (is_plugged) {
+ if (bat->pdata->enable_charger)
+ bat->pdata->enable_charger();
+ bat->status = POWER_SUPPLY_STATUS_CHARGING;
+ } else {
+ if (bat->pdata->disable_charger)
+ bat->pdata->disable_charger();
+ bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
+ }
+ } else {
+ if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) {
+ is_charged = gpio_get_value(
+ main_bat.pdata->gpio_charge_finished);
+ if (is_charged) {
+ if (bat->pdata->disable_charger)
+ bat->pdata->disable_charger();
+ bat->status = POWER_SUPPLY_STATUS_FULL;
+ } else {
+ if (bat->pdata->enable_charger)
+ bat->pdata->enable_charger();
+ bat->status = POWER_SUPPLY_STATUS_CHARGING;
+ }
+ }
+ }
+
+ power_supply_changed(&bat->psy);
+}
+
+static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id)
+{
+ schedule_delayed_work(&bat_work,
+ msecs_to_jiffies(JITTER_DELAY));
+ return IRQ_HANDLED;
+}
+
+static int __init s3c_adc_bat_probe(struct platform_device *pdev)
+{
+ struct s3c_adc_client *client;
+ struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
+ int ret;
+
+ client = s3c_adc_register(pdev, NULL, NULL, 0);
+ if (IS_ERR(client)) {
+ dev_err(&pdev->dev, "cannot register adc\n");
+ return PTR_ERR(client);
+ }
+
+ platform_set_drvdata(pdev, client);
+
+ main_bat.client = client;
+ main_bat.pdata = pdata;
+ main_bat.volt_value = -1;
+ main_bat.cur_value = -1;
+ main_bat.cable_plugged = 0;
+ main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING;
+
+ ret = power_supply_register(&pdev->dev, &main_bat.psy);
+ if (ret)
+ goto err_reg_main;
+ if (pdata->backup_volt_mult) {
+ backup_bat.client = client;
+ backup_bat.pdata = pdev->dev.platform_data;
+ backup_bat.volt_value = -1;
+ ret = power_supply_register(&pdev->dev, &backup_bat.psy);
+ if (ret)
+ goto err_reg_backup;
+ }
+
+ INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work);
+
+ if (pdata->gpio_charge_finished >= 0) {
+ ret = gpio_request(pdata->gpio_charge_finished, "charged");
+ if (ret)
+ goto err_gpio;
+
+ ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished),
+ s3c_adc_bat_charged,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ "battery charged", NULL);
+ if (ret)
+ goto err_irq;
+ }
+
+ if (pdata->init) {
+ ret = pdata->init();
+ if (ret)
+ goto err_platform;
+ }
+
+ dev_info(&pdev->dev, "successfully loaded\n");
+ device_init_wakeup(&pdev->dev, 1);
+
+ /* Schedule timer to check current status */
+ schedule_delayed_work(&bat_work,
+ msecs_to_jiffies(JITTER_DELAY));
+
+ return 0;
+
+err_platform:
+ if (pdata->gpio_charge_finished >= 0)
+ free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
+err_irq:
+ if (pdata->gpio_charge_finished >= 0)
+ gpio_free(pdata->gpio_charge_finished);
+err_gpio:
+ if (pdata->backup_volt_mult)
+ power_supply_unregister(&backup_bat.psy);
+err_reg_backup:
+ power_supply_unregister(&main_bat.psy);
+err_reg_main:
+ return ret;
+}
+
+static int s3c_adc_bat_remove(struct platform_device *pdev)
+{
+ struct s3c_adc_client *client = platform_get_drvdata(pdev);
+ struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
+
+ power_supply_unregister(&main_bat.psy);
+ if (pdata->backup_volt_mult)
+ power_supply_unregister(&backup_bat.psy);
+
+ s3c_adc_release(client);
+
+ if (pdata->gpio_charge_finished >= 0) {
+ free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
+ gpio_free(pdata->gpio_charge_finished);
+ }
+
+ cancel_delayed_work(&bat_work);
+
+ if (pdata->exit)
+ pdata->exit();
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c_adc_bat_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
+
+ if (pdata->gpio_charge_finished >= 0) {
+ if (device_may_wakeup(&pdev->dev))
+ enable_irq_wake(
+ gpio_to_irq(pdata->gpio_charge_finished));
+ else {
+ disable_irq(gpio_to_irq(pdata->gpio_charge_finished));
+ main_bat.pdata->disable_charger();
+ }
+ }
+
+ return 0;
+}
+
+static int s3c_adc_bat_resume(struct platform_device *pdev)
+{
+ struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
+
+ if (pdata->gpio_charge_finished >= 0) {
+ if (device_may_wakeup(&pdev->dev))
+ disable_irq_wake(
+ gpio_to_irq(pdata->gpio_charge_finished));
+ else
+ enable_irq(gpio_to_irq(pdata->gpio_charge_finished));
+ }
+
+ /* Schedule timer to check current status */
+ schedule_delayed_work(&bat_work,
+ msecs_to_jiffies(JITTER_DELAY));
+
+ return 0;
+}
+#else
+#define s3c_adc_battery_suspend NULL
+#define s3c_adc_battery_resume NULL
+#endif
+
+static struct platform_driver s3c_adc_bat_driver = {
+ .driver = {
+ .name = "s3c-adc-battery",
+ },
+ .probe = s3c_adc_bat_probe,
+ .remove = s3c_adc_bat_remove,
+ .suspend = s3c_adc_bat_suspend,
+ .resume = s3c_adc_bat_resume,
+};
+
+static int __init s3c_adc_bat_init(void)
+{
+ return platform_driver_register(&s3c_adc_bat_driver);
+}
+module_init(s3c_adc_bat_init);
+
+static void __exit s3c_adc_bat_exit(void)
+{
+ platform_driver_unregister(&s3c_adc_bat_driver);
+}
+module_exit(s3c_adc_bat_exit);
+
+MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
+MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controler driver");
+MODULE_LICENSE("GPL");
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff