File linux-2.6.34-moorestown-pmic-battery-driver.patch of Package kernel
From 10551a86fa76709587b48a644caeb78dd07690be Mon Sep 17 00:00:00 2001
From: Nithish Mahalingam <nithish.mahalingam@intel.com>
Date: Tue, 29 Dec 2009 22:42:48 +0530
Subject: [PATCH 068/104] Adding Intel Moorestown PMIC Battery Driver
PMIC Battery driver provides battery charging and battery gauge functionality
on Intel Moorestown platform.
Signed-off-by: Nithish Mahalingam <nithish.mahalingam@intel.com>
---
drivers/power/Kconfig | 7 +
drivers/power/Makefile | 1 +
drivers/power/pmic_battery.c | 799 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 807 insertions(+), 0 deletions(-)
create mode 100644 drivers/power/pmic_battery.c
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index d4b3d67..6936bc8 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -124,4 +124,11 @@ config CHARGER_PCF50633
help
Say Y to include support for NXP PCF50633 Main Battery Charger.
+config BATTERY_MRSTPMIC
+ tristate "PMIC battery driver for Intel Moorestown platform"
+ depends on SPI_MRST && LNW_IPC && USB_GADGET_LANGWELL
+ help
+ Say Y here to enable battery driver on Intel Moorestown
+ platform.
+
endif # POWER_SUPPLY
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 573597c..97af4b4 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -31,3 +31,4 @@ obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
+obj-$(CONFIG_BATTERY_MRSTPMIC) += pmic_battery.o
diff --git a/drivers/power/pmic_battery.c b/drivers/power/pmic_battery.c
new file mode 100644
index 0000000..6e3c46a
--- /dev/null
+++ b/drivers/power/pmic_battery.c
@@ -0,0 +1,799 @@
+/*
+ * pmic_battery.c - Intel Moorestown 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/power_supply.h>
+
+#include <asm/ipc_defs.h>
+#include <linux/usb/langwell_udc.h>
+
+
+MODULE_AUTHOR("Nithish Mahalingam <nithish.mahalingam@intel.com>");
+MODULE_DESCRIPTION("Intel Moorestown PMIC Battery Driver");
+MODULE_LICENSE("GPL");
+
+#define DRIVER_NAME "pmic_battery"
+
+/*********************************************************************
+ * Generic defines
+ *********************************************************************/
+
+static int pmicbatteryDebug;
+module_param(pmicbatteryDebug, int, 0444);
+MODULE_PARM_DESC(pmicbatteryDebug,
+ "Flag to enable PMIC Battery debug messages.");
+
+#define PMIC_BATT_DEBUG (pmicbatteryDebug)
+
+#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_CMDID 0xEF
+#define PMIC_BATT_CHR_IPC_FCHRG_SUBID 0x4
+#define PMIC_BATT_CHR_IPC_TCHRG_SUBID 0x6
+
+/* internal return values */
+#define BATTSUCCESS 0
+#define EBATTFAIL 1
+#define EBATTERR 2
+
+/* 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 cca value */
+struct batt_cca_data {
+ signed int cca_val;
+};
+
+/* battery property structure */
+struct batt_prop_data {
+ unsigned int batt_capacity;
+ char batt_chrg_crnt;
+ char batt_chrg_volt;
+ char batt_chrg_prot;
+ char batt_chrg_prot2;
+ char batt_chrg_timer;
+} __attribute__((packed));
+
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+
+/*
+ * pmic battery info
+ */
+struct pmic_power_module_info {
+ bool is_dev_info_updated;
+ struct spi_device *spi;
+ /* 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,
+ POWER_SUPPLY_PROP_CHARGE_AVG,
+};
+
+
+/**
+ * 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)
+{
+ switch (event) {
+ case BATT_EVENT_BATOVP_EXCPT:
+ printk(KERN_WARNING "pmic-battery: battery overvoltage "
+ "condition detected\n");
+ break;
+ case BATT_EVENT_USBOVP_EXCPT:
+ printk(KERN_WARNING "pmic-battery: usb charger overvoltage "
+ "condition detected\n");
+ break;
+ case BATT_EVENT_TEMP_EXCPT:
+ printk(KERN_WARNING "pmic-battery: high battery temperature "
+ "condition detected\n");
+ break;
+ case BATT_EVENT_DCLMT_EXCPT:
+ printk(KERN_WARNING "pmic-battery: over battery charge "
+ " current condition detected\n");
+ break;
+ default:
+ printk(KERN_WARNING "pmic-battery: charger/battery "
+ " exception detected\n");
+ 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 = 0;
+ unsigned int chrg_val = 0;
+ struct ipc_pmic_reg_data pmic_batt_reg = {0};
+ struct ipc_cmd_type pmic_batt_cmd = {0};
+ struct batt_cca_data ccval = {0};
+ struct batt_prop_data batt_prop = {0};
+ 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 */
+
+ pmic_batt_cmd.ioc = TRUE;
+ pmic_batt_cmd.cmd = IPC_BATT_CCA_READ;
+ if (ipc_config_cmd(pmic_batt_cmd, sizeof(struct batt_cca_data),
+ &ccval)) {
+ dev_warn(&pbi->spi->dev, "%s(): ipc config cmd failed\n",
+ __func__);
+ return;
+ }
+
+ pmic_batt_reg.ioc = TRUE;
+ pmic_batt_reg.pmic_reg_data[0].register_address =
+ PMIC_BATT_CHR_SCHRGINT_ADDR;
+ pmic_batt_reg.num_entries = 1;
+
+ if (ipc_pmic_register_read(&pmic_batt_reg)) {
+ dev_warn(&pbi->spi->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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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.cca_val & PMIC_BATT_ADC_ACCCHRGVAL_MASK;
+
+ /* set batt_prev_charge_full to battery capacity the first time */
+ if (!pbi->is_dev_info_updated) {
+ pmic_batt_cmd.ioc = TRUE;
+ pmic_batt_cmd.cmd = IPC_BATT_GET_PROP;
+ if (ipc_config_cmd(pmic_batt_cmd,
+ sizeof(struct batt_prop_data), &batt_prop)) {
+ dev_warn(&pbi->spi->dev, "%s(): ipc config cmd "
+ "failed\n", __func__);
+ return;
+ }
+ pbi->batt_prev_charge_full = batt_prop.batt_capacity;
+ }
+
+ /* set batt_status */
+ if ((batt_present) && (!batt_exception)) {
+ if (pmic_batt_reg.pmic_reg_data[0].value &
+ PMIC_BATT_CHR_SCOMP_MASK) {
+ pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
+ pbi->batt_prev_charge_full = chrg_val;
+ } else if (ccval.cca_val & 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;
+}
+
+/**
+ * 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 = pbi->batt_charge_now;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ val->intval = pbi->batt_prev_charge_full;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_AVG:
+ val->intval = pbi->batt_charge_rate;
+ 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 = lnw_ipc_single_cmd(PMIC_BATT_CHR_IPC_CMDID,
+ PMIC_BATT_CHR_IPC_FCHRG_SUBID, 0, 0);
+ break;
+ case BATT_USBOTG_TRICKLE_CHARGE:
+ retval = lnw_ipc_single_cmd(PMIC_BATT_CHR_IPC_CMDID,
+ PMIC_BATT_CHR_IPC_TCHRG_SUBID, 0, 0);
+ break;
+ default:
+ dev_warn(&pbi->spi->dev, "%s(): out of range usb charger "
+ "charge detected\n", __func__);
+ return -EBATTFAIL;
+ }
+
+ if (retval) {
+ dev_warn(&pbi->spi->dev, "%s(): ipc pmic read failed\n",
+ __func__);
+ return -EBATTFAIL;
+ }
+
+ return BATTSUCCESS;
+}
+
+/**
+ * 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 =
+ (struct pmic_power_module_info *)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 ipc_pmic_reg_data pmic_batt_reg = {0};
+ struct pmic_power_module_info *pbi = container_of(work,
+ struct pmic_power_module_info, handler);
+ int power = 0;
+ enum batt_charge_type chrg;
+ int retval = 0;
+
+ /* check if pmic_power_module_info is initialized */
+ if (!pbi)
+ return;
+
+ /* read schrgint register to interpret cause of interrupt */
+ pmic_batt_reg.ioc = TRUE;
+ pmic_batt_reg.pmic_reg_data[0].register_address =
+ PMIC_BATT_CHR_SCHRGINT_ADDR;
+ pmic_batt_reg.num_entries = 1;
+
+ if (ipc_pmic_register_read(&pmic_batt_reg)) {
+ dev_warn(&pbi->spi->dev, "%s(): ipc pmic read failed\n",
+ __func__);
+ return;
+ }
+
+ /* find the cause of the interrupt */
+
+ if (pmic_batt_reg.pmic_reg_data[0].value & 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 (pmic_batt_reg.pmic_reg_data[0].value &
+ 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 (pmic_batt_reg.pmic_reg_data[0].value & PMIC_BATT_CHR_SCOMP_MASK) {
+ struct ipc_cmd_type pmic_batt_cmd = {0};
+ struct batt_cca_data ccval = {0};
+
+ pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
+ pmic_batt_cmd.ioc = TRUE;
+ pmic_batt_cmd.cmd = IPC_BATT_CCA_READ;
+ if (ipc_config_cmd(pmic_batt_cmd,
+ sizeof(struct batt_cca_data), &ccval)) {
+ dev_warn(&pbi->spi->dev, "%s(): ipc config cmd "
+ "failed\n", __func__);
+ return;
+ }
+ pbi->batt_prev_charge_full = ccval.cca_val &
+ PMIC_BATT_ADC_ACCCHRGVAL_MASK;
+ return;
+ }
+
+ if (pmic_batt_reg.pmic_reg_data[0].value & 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 */
+
+ /* check usb otg power capability and set charger accordingly */
+ retval = langwell_udc_maxpower(&power);
+ if (retval) {
+ dev_warn(&pbi->spi->dev, "%s(): usb otg power query failed "
+ "with error code %d\n", __func__, retval);
+ return;
+ }
+
+ if (power >= 500)
+ chrg = BATT_USBOTG_500MA_CHARGE;
+ else
+ chrg = BATT_USBOTG_TRICKLE_CHARGE;
+
+ /* enable battery charging */
+ if (pmic_battery_set_charger(pbi, chrg)) {
+ dev_warn(&pbi->spi->dev, "%s(): failed to setup battery "
+ "charging\n", __func__);
+ return;
+ }
+
+ if (PMIC_BATT_DEBUG)
+ printk(KERN_INFO "pmic-battery: %s() - setting up battery "
+ "charger successful\n", __func__);
+}
+
+/**
+ * pmic_battery_probe - pmic battery initialize
+ * @spi: pmic battery spi structure
+ * Context: can sleep
+ *
+ * PMIC battery initializes its internal data structue and other
+ * infrastructure components for it to work as expected.
+ */
+static int pmic_battery_probe(struct spi_device *spi)
+{
+ int retval = 0;
+ struct pmic_power_module_info *pbi = 0;
+
+ if (PMIC_BATT_DEBUG)
+ printk(KERN_INFO "pmic-battery: %s() - found pmic battery "
+ "device\n", __func__);
+
+ pbi = kzalloc(sizeof(*pbi), GFP_KERNEL);
+ if (!pbi) {
+ dev_err(&spi->dev, "%s(): memory allocation failed\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ pbi->spi = spi;
+ pbi->irq = spi->irq;
+ dev_set_drvdata(&spi->dev, pbi);
+
+ /* initialize all required framework before enabling interrupts */
+ INIT_WORK(&pbi->handler, (void *)pmic_battery_handle_intrpt);
+ INIT_DELAYED_WORK(&pbi->monitor_battery, pmic_battery_monitor);
+ pbi->monitor_wqueue =
+ create_singlethread_workqueue(dev_name(&spi->dev));
+ if (!pbi->monitor_wqueue) {
+ dev_err(&spi->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(&spi->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(&spi->dev, &pbi->batt);
+ if (retval) {
+ dev_err(&spi->dev, "%s(): failed to register pmic battery "
+ "device with power supply subsystem\n",
+ __func__);
+ goto power_reg_failed;
+ }
+
+ if (PMIC_BATT_DEBUG)
+ printk(KERN_INFO "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(&spi->dev, &pbi->usb);
+ if (retval) {
+ dev_err(&spi->dev, "%s(): failed to register pmic usb "
+ "device with power supply subsystem\n",
+ __func__);
+ goto power_reg_failed_1;
+ }
+
+ if (PMIC_BATT_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;
+}
+
+/**
+ * pmic_battery_remove - pmic battery finalize
+ * @spi: pmic battery spi 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 pmic_battery_remove(struct spi_device *spi)
+{
+ struct pmic_power_module_info *pbi = dev_get_drvdata(&spi->dev);
+
+ if (pbi) {
+ 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;
+}
+
+
+/*********************************************************************
+ * Driver initialisation and finalization
+ *********************************************************************/
+
+static struct spi_driver pmic_battery_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = pmic_battery_probe,
+ .remove = __devexit_p(pmic_battery_remove),
+};
+
+
+static int __init pmic_battery_module_init(void)
+{
+ return spi_register_driver(&pmic_battery_driver);
+}
+
+static void __exit pmic_battery_module_exit(void)
+{
+ spi_unregister_driver(&pmic_battery_driver);
+}
+
+module_init(pmic_battery_module_init);
+module_exit(pmic_battery_module_exit);
--
1.6.2.5
