[RFC] intel_mid: Intel MSIC battery driver

From: Alan Cox
Date: Mon Dec 13 2010 - 10:53:42 EST

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(This is an RFC as it depends upon some USB side power patches heading upstream
via the USB stack and not yet finally merged. However feedback to get this bit
ready for when they do would still be useful)

From: Ramakrishna Pallala <ramakrishna.pallala@xxxxxxxxx>

Battery driver for the Intel MID platform devices based on the Medfield
chipset. This is a fold up of all the current work on the Medfield MSIC
battery driver.

Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@xxxxxxxxx>
[Some cleanups, fixes, and ipc write helper]
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
---

drivers/power/Kconfig | 15
drivers/power/Makefile | 3
drivers/power/intel_mdf_battery.c | 2704 +++++++++++++++++++++++++++++++++++++
3 files changed, 2717 insertions(+), 5 deletions(-)
create mode 100644 drivers/power/intel_mdf_battery.c

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 3216529..0b697c1 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -165,12 +165,19 @@ config BATTERY_JZ4740
This driver can be build as a module. If so, the module will be
called jz4740-battery.

-config BATTERY_INTEL_MID
- tristate "Battery driver for Intel MID platforms"
+config BATTERY_INTEL_MID_MRST
+ tristate "Battery driver for Intel Moorestown MID platforms"
depends on INTEL_SCU_IPC && SPI
help
- Say Y here to enable the battery driver on Intel MID
- platforms.
+ Say Y here to enable the battery driver on Intel Moorestown
+ based MID platforms.
+
+config BATTERY_INTEL_MID_MFLD
+ tristate "Battery driver for Intel Medfield MID platforms"
+ depends on INTEL_SCU_IPC && USB_PENWELL_OTG
+ help
+ Say Y here to enable the battery driver on Intel Medfield
+ based MID platforms.

config CHARGER_ISP1704
tristate "ISP1704 USB Charger Detection"
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 545459f..f24b198 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -29,7 +29,8 @@ obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
obj-$(CONFIG_BATTERY_JZ4740) += jz4740-battery.o
-obj-$(CONFIG_BATTERY_INTEL_MID) += intel_mid_battery.o
+obj-$(CONFIG_BATTERY_INTEL_MID_MRST) += intel_mid_battery.o
+obj-$(CONFIG_BATTERY_INTEL_MID_MFLD) += intel_mdf_battery.o
obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o
obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o
obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
diff --git a/drivers/power/intel_mdf_battery.c b/drivers/power/intel_mdf_battery.c
new file mode 100644
index 0000000..91f6897
--- /dev/null
+++ b/drivers/power/intel_mdf_battery.c
@@ -0,0 +1,2704 @@
+/*
+ * intel_mdf_battery.c - Intel Medfield MSIC Internal charger and Battery Driver
+ *
+ * Copyright (C) 2010 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: Ananth Krishna <ananth.krishna.r@xxxxxxxxx>,
+ * Anantha Narayanan <anantha.narayanan@xxxxxxxxx>
+ * Ramakrishna Pallala <ramakrishna.pallala@xxxxxxxxx>
+ */
+
+#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/slab.h>
+#include <linux/kfifo.h>
+#include <linux/param.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/io.h>
+#include <linux/sched.h>
+#include <linux/pm_runtime.h>
+
+#include <asm/intel_scu_ipc.h>
+#include <linux/usb/penwell_otg.h>
+
+#define DRIVER_NAME "intel_mdf_battery"
+
+/*********************************************************************
+ * Generic defines
+ *********************************************************************/
+
+#define MSIC_BATT_PRESENT 1
+#define MSIC_BATT_NOT_PRESENT 0
+#define MSIC_USB_CHARGER_PRESENT 1
+#define MSIC_USB_CHARGER_NOT_PRESENT 0
+
+/* Interrupt registers*/
+#define MSIC_BATT_CHR_PWRSRCINT_ADDR 0x005
+#define MSIC_BATT_CHR_BATTDET_MASK (1 << 0)
+#define MSIC_BATT_CHR_USBDET_MASK (1 << 1)
+#define MSIC_BATT_CHR_ADPLVDET_MASK (1 << 3)
+#define MSIC_BATT_CHR_ADPHVDET_MASK (1 << 4)
+
+#define MSIC_BATT_PWRSRC_MASK 0x1A
+
+#define MSIC_BATT_CHR_PWRSRCINT1_ADDR 0x006
+#define MSIC_BATT_CHR_USBDCDET_MASK (1 << 2)
+#define MSIC_BATT_CHR_USBCHPDET_MASK (1 << 6)
+
+#define MSIC_BATT_CHR_CHRINT_ADDR 0x007
+#define MSIC_BATT_CHR_BATTOCP_MASK (1 << 1)
+#define MSIC_BATT_CHR_BATTOTP_MASK (1 << 2)
+#define MSIC_BATT_CHR_LOWBATT_MASK (1 << 3)
+#define MSIC_BATT_CHR_WDTIMEEXP_MASK (1 << 5)
+#define MSIC_BATT_CHR_ADPOVP_MASK (1 << 6)
+#define MSIC_BATT_CHR_TIMEEXP_MASK (1 << 7)
+
+#define MSIC_BATT_CHRINT_EXCP_MASK 0x5E
+#define MSIC_BATT_CHR_CHRINT1_ADDR 0x008
+#define MSIC_BATT_CHR_WKVINDET_MASK (1 << 2)
+#define MSIC_BATT_CHR_VINREGMINT_MASK (1 << 4)
+#define MSIC_BATT_CHR_CHROTP_MASK (1 << 3)
+#define MSIC_BATT_CHR_BATTOVP_MASK (1 << 5)
+#define MSIC_BATT_CHR_USBOVP_MASK (1 << 6)
+#define MSIC_BATT_CHR_CHRCMPLT_MASK (1 << 7)
+#define MSIC_BATT_CHRINT1_EXCP_MASK 0x68
+
+/* Interrupt Mask registers */
+#define MSIC_BATT_CHR_MPWRSRCINT_ADDR 0x014
+#define MSIC_BATT_CHR_MPWRSRCINT1_ADDR 0x015
+#define MSIC_BATT_CHR_MCHRINT_ADDR 0x016
+#define MSIC_BATT_CHR_MCHRINT1_ADDR 0x017
+
+/* Internal charger control registers */
+#define MSIC_BATT_CHR_CHRCTRL_ADDR 0x188
+#define CHRCNTL_CHRG_DISABLE (1 << 2)
+
+#define MSIC_BATT_CHR_CHRCVOLTAGE_ADDR 0x189
+/* Set Charger Voltage to 4140 mV */
+#define CHR_CHRVOLTAGE_SET_DEF 4140
+
+#define MSIC_BATT_CHR_CHRCCURRENT_ADDR 0x18A
+
+#define MSIC_BATT_CHR_SPCHARGER_ADDR 0x18B
+#define CHR_SPCHRGER_LOWCHR_ENABLE (1 << 5)
+#define CHR_SPCHRGER_WEAKVIN 0x04
+
+#define MSIC_BATT_CHR_CHRTTIME_ADDR 0x18C
+#define CHR_CHRTIME_SET_13HRS 0x0F
+
+#define MSIC_BATT_CHR_CHRCTRL1_ADDR 0x18D
+#define MSIC_EMRG_CHRG_ENBL (1 << 3)
+/* Lower Temp thresold set to -10C */
+#define MSIC_EMRG_CHRG_TEMP (1 << 4)
+
+/* Safe limit registers */
+#define MSIC_BATT_CHR_PWRSRCLMT_ADDR 0x18E /* Temperature limits */
+#define CHR_PWRSRCLMT_SET_RANGE 0xC0
+
+#define MSIC_BATT_CHR_CHRSTWDT_ADDR 0x18F /* Watchdog timer */
+#define CHR_WDT_DISABLE 0x0
+#define CHR_WDT_SET_60SEC 0x10
+
+#define MSIC_BATT_CHR_WDTWRITE_ADDR 0x190
+#define WDTWRITE_UNLOCK_VALUE 0x01
+
+#define MSIC_BATT_CHR_CHRSAFELMT_ADDR 0x191 /* Maximum safe charging
+ voltage and current */
+
+/* Status registers */
+#define MSIC_BATT_CHR_SPWRSRCINT_ADDR 0x192
+#define MSIC_BATT_CHR_SPWRSRCINT1_ADDR 0x193
+#define MSIC_BATT_CHR_USBSLOWBATT_MASK (1 << 0)
+
+/* ADC1 - registers */
+#define ADC_CHNL_START_ADDR 0x1C5 /* increments by 1 */
+#define ADC_DATA_START_ADDR 0x1D4 /* increments by 2 */
+
+#define MSIC_ADC1CNTL1_ADDR 0x1C0
+#define MSIC_CNTL1_ADC_ENBL 0x10
+#define MSIC_CNTL1_RR_ENBL 0x08
+
+#define MSIC_ADC1CNTL2_ADDR 0x1C1
+#define MSIC_ADC1CNTL3_ADDR 0x1C2
+#define MSIC_CNTL3_ADCTHERM_ENBL 0x04
+#define MSIC_CNTL3_ADCRRDATA_ENBL 0x05
+#define MSIC_CHANL_MASK_VAL 0x0F
+
+#define MSIC_STOPBIT_MASK 0x10
+#define MSIC_ADCTHERM_MASK 4
+#define ADC_CHANLS_MAX 15 /* num of adc channels */
+#define MSIC_BATT_SENSORS 4 /* 3 for battery pack and one USB */
+#define ADC_LOOP_MAX (ADC_CHANLS_MAX - MSIC_BATT_SENSORS)
+
+/* ADC Channel Numbers */
+#define MSIC_BATT_PACK_VOL 0x0
+#define MSIC_BATT_PACK_CUR 0x1
+#define MSIC_BATT_PACK_TEMP 0x7
+#define MSIC_USB_VOLTAGE 0x5
+#define MSIC_ADC_VOL_IDX 0
+#define MSIC_ADC_CUR_IDX 1
+#define MSIC_ADC_TEMP_IDX 2
+#define MSIC_ADC_USB_VOL_IDX 3
+
+
+#define MSIC_VAUDA 0x0DB
+#define MSIC_VAUDA_VAL 0xFF
+
+/*MSIC battery temperature attributes*/
+#define MSIC_BTP_ADC_MIN 107
+#define MSIC_BTP_ADC_MAX 977
+
+
+/*convert adc_val to voltage mV */
+#define MSIC_MAX_VOL_DEV ((5 * 4692) / 1000)
+#define MSIC_ADC_TO_VOL(adc_val) ((4692 * (adc_val)) / 1000)
+
+/*convert adc_val to current mA */
+#define MSIC_ADC_MAX_CUR 4000 /* In milli Amph */
+#define MSIC_ADC_TO_CUR(adc_val) ((78125 * (adc_val)) / 10000)
+
+
+/* Convert ADC value to VBUS voltage */
+#define MSIC_ADC_TO_VBUS_VOL(adc_val) ((6843 * (adc_val)) / 1000)
+
+/* ADC2 - Coulomb Counter registers */
+#define MSIC_BATT_ADC_CCADCHA_ADDR 0x205
+#define MSIC_BATT_ADC_CCADCLA_ADDR 0x206
+
+#define MSIC_BATT_ADC_CHRGNG_MASK (1 << 31)
+#define MSIC_BATT_ADC_ACCCHRGVAL_MASK 0x7FFFFFFF
+
+#define CHR_STATUS_FLULT_REG 0x37D
+#define CHR_STATUS_TMR_RST (1 << 7)
+#define CHR_STATUS_VOTG_ENBL (1 << 7)
+#define CHR_STATUS_STAT_ENBL (1 << 6)
+
+#define CHR_STATUS_BIT_MASK 0x30
+#define CHR_STATUS_BIT_READY 0x0
+#define CHR_STATUS_BIT_PROGRESS 0x1
+#define CHR_STATUS_BIT_CYCLE 0x2
+#define CHR_STATUS_BIT_FAULT 0x3
+
+#define CHR_FAULT_BIT_MASK 0x7
+#define CHR_FAULT_BIT_NORMAL 0x0
+#define CHR_FAULT_BIT_VBUS_OVP 0x1
+#define CHR_FAULT_BIT_SLEEP 0x2
+#define CHR_FAULT_BIT_LOW_VBUS 0x3
+#define CHR_FAULT_BIT_BATT_OVP 0x4
+#define CHR_FAULT_BIT_THRM 0x5
+#define CHR_FAULT_BIT_TIMER 0x6
+#define CHR_FAULT_BIT_NO_BATT 0x7
+
+/*
+ * Convert the voltage form decimal to
+ * Register writable format
+ */
+#define CONV_VOL_DEC_MSICREG(a) (((a - 3500) / 20) << 2)
+
+#define BATT_LOWBATT_CUTOFF_VOLT 3800 /* 3800 mV */
+#define BATT_DEAD_CUTOFF_VOLT 3400 /* 3400 mV */
+#define BATT_ADC_VOLT_ERROR 25 /* 25 mV */
+#define CHARGE_FULL_IN_MAH 1500 /* 1500 mAh */
+#define MSIC_CHRG_RBATT_VAL 180 /* 180 mOhms */
+#define COLMB_TO_MAHRS_CONV_FCTR 3600
+
+#define MSIC_BATT_TEMP_MAX 60000 /* 60000 milli degrees */
+#define MSIC_BATT_TEMP_MIN 0
+#define MSIC_TEMP_HYST_ERR 4000 /* 4000 milli degrees */
+
+/* internal return values */
+#define BIT_SET 1
+#define BIT_RESET 0
+
+/* IPC defines */
+#define IPCMSG_BATTERY 0xEF
+
+#define TEMP_CHARGE_DELAY_JIFFIES (HZ * 30) /*30 sec */
+#define CHARGE_STATUS_DELAY_JIFFIES (HZ * 10) /*10 sec */
+
+#define IRQ_FIFO_MAX 16
+#define THERM_CURVE_MAX_SAMPLES 7
+#define THERM_CURVE_MAX_VALUES 4
+#define BATT_STRING_MAX 8
+#define HYSTR_SAMPLE_MAX 4
+
+#define DISCHRG_CURVE_MAX_SAMPLES 17
+#define DISCHRG_CURVE_MAX_COLOMNS 2
+
+
+/*
+ * This array represents the Discharge curve of the battery
+ * Colomn 0 represnts Voltage in mV and colomn 1 represent
+ * charge in mColoumbs.
+ */
+static uint32_t const dischargeCurve[DISCHRG_CURVE_MAX_SAMPLES]
+ [DISCHRG_CURVE_MAX_COLOMNS] = {
+ /* in mV , in mC */
+ {4200, 56603000},
+ {4150, 55754000},
+ {4100, 54905000},
+ {4050, 52385000},
+ {4000, 49811000},
+ {3950, 46697000},
+ {3900, 43584000},
+ {3850, 39339000},
+ {3800, 35094000},
+ {3750, 27452000},
+ {3700, 19811000},
+ {3650, 12735000},
+ {3600, 5660000},
+ {3550, 3963000},
+ {3500, 2264000},
+ {3450, 1132000},
+ {3400, 0}
+};
+
+
+/* Valid msic exceptional events */
+enum msic_event {
+ MSIC_EVENT_BATTOCP_EXCPT,
+ MSIC_EVENT_BATTOTP_EXCPT,
+ MSIC_EVENT_LOWBATT_EXCPT,
+ MSIC_EVENT_BATTOVP_EXCPT,
+ MSIC_EVENT_ADPOVP_EXCPT,
+ MSIC_EVENT_CHROTP_EXCPT,
+ MSIC_EVENT_USBOVP_EXCPT,
+ MSIC_EVENT_USB_VINREG_EXCPT,
+ MSIC_EVENT_WEAKVIN_EXCPT,
+ MSIC_EVENT_TIMEEXP_EXCPT,
+};
+
+/* Valid Charging modes */
+enum {
+ BATT_CHARGING_MODE_NONE = 0,
+ BATT_CHARGING_MODE_NORMAL,
+ BATT_CHARGING_MODE_MAINTAINENCE,
+};
+
+
+static void *otg_handle;
+static struct device *msic_dev;
+
+/* Variables for counting charge cycles */
+static unsigned int charge_cycle_ctr;
+static unsigned int chr_clmb_ctr;
+
+
+/*
+ * This array represents the Battery Pack thermistor
+ * temarature and corresponding ADC value limits
+ */
+static int const therm_curve_data[THERM_CURVE_MAX_SAMPLES]
+ [THERM_CURVE_MAX_VALUES] = {
+ /* {temp_max, temp_min, adc_max, adc_min} */
+ {-10, -20, 977, 941},
+ {0, -10, 941, 887},
+ {10, 0, 887, 769},
+ {50, 10, 769, 357},
+ {75, 50, 357, 186},
+ {100, 75, 186, 107},
+};
+
+
+/*********************************************************************
+ * SFI table entries Structures
+ *********************************************************************/
+
+/* Battery Identifier */
+struct battery_id {
+ unsigned char manufac[3];
+ unsigned char model[5];
+ unsigned char sub_ver[3];
+};
+
+/* Parameters defining the range */
+struct temperature_monitoring_range {
+ unsigned char range_number;
+ char temp_low_lim;
+ char temp_up_lim;
+ short int full_chrg_cur;
+ short int full_chrg_vol;
+ short int maint_chrg_cur;
+ short int maint_chrg_vol_ll;
+ short int maint_chrg_vol_ul;
+};
+
+/* SFI table entries structure. This code
+ * will be modified or removed when the
+ * Firmware supports SFI entries for Battery
+ */
+struct msic_batt_sfi_prop {
+ unsigned char sign[5];
+ unsigned int length;
+ unsigned char revision;
+ unsigned char checksum;
+ unsigned char oem_id[7];
+ unsigned char oem_tid[9];
+ struct battery_id batt_id;
+ unsigned short int voltage_max;
+ unsigned int capacity;
+ unsigned char battery_type;
+ char safe_temp_low_lim;
+ char safe_temp_up_lim;
+ unsigned short int safe_vol_low_lim;
+ unsigned short int safe_vol_up_lim;
+ unsigned short int chrg_cur_lim;
+ char chrg_term_lim;
+ unsigned short int term_cur;
+ char temp_mon_ranges;
+ struct temperature_monitoring_range temp_mon_range[4];
+ unsigned int sram_addr;
+};
+
+static struct msic_batt_sfi_prop *sfi_table;
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+struct charge_params {
+ short int cvol;
+ short int ccur;
+ short int vinilmt;
+ enum usb_charger_type chrg_type;
+};
+
+struct msic_batt_props {
+ unsigned int status;
+ unsigned int health;
+ unsigned int present;
+ unsigned int technology;
+ unsigned int vol_max_des;
+ unsigned int vol_now;
+ unsigned int cur_now;
+ unsigned int charge_full; /* in mAh */
+ unsigned int charge_now; /* in mAh */
+ unsigned int charge_ctr; /* Coloumb counter raw value */
+ unsigned int charge_avg; /* moving avg of charge now */
+ unsigned int energy_full; /* in mWh */
+ unsigned int energy_now; /* in mWh */
+ unsigned int capacity_level; /* enumerated values */
+ unsigned int capacity; /* in units persentage */
+ unsigned int temperature; /* in milli Centigrade*/
+ char model[BATT_STRING_MAX];
+ char vender[BATT_STRING_MAX];
+};
+
+struct msic_charg_props {
+ unsigned int charger_type;
+ unsigned int charger_present;
+ unsigned int charger_health;
+ unsigned int vbus_vol;
+ char charger_model[BATT_STRING_MAX];
+ char charger_vender[BATT_STRING_MAX];
+};
+
+/*
+ * All interrupt request are queued from interrupt
+ * handler and processed in the bottom half
+ */
+static DEFINE_KFIFO(irq_fifo, u32, IRQ_FIFO_MAX);
+
+/*
+ * msic battery info
+ */
+struct msic_power_module_info {
+
+ struct platform_device *pdev;
+
+ /* msic charger data */
+ /* lock to protect usb charger properties
+ * locking is applied whereever read or write
+ * operation is being performed to the msic usb
+ * charger property structure.
+ */
+ struct mutex usb_chrg_lock;
+ struct msic_charg_props usb_chrg_props;
+ struct power_supply usb;
+
+ /* msic battery data */
+ /* lock to protect battery properties
+ * locking is applied whereever read or write
+ * operation is being performed to the msic battery
+ * property structure.
+ */
+ struct mutex batt_lock;
+ struct msic_batt_props batt_props;
+ struct power_supply batt;
+
+ uint16_t adc_index; /* ADC Channel Index */
+ int irq; /* GPE_ID or IRQ# */
+
+ struct delayed_work connect_handler;
+ struct delayed_work disconn_handler;
+ struct charge_params ch_params; /* holds the charge parameters */
+
+ unsigned long update_time; /* jiffies when data read */
+
+ void __iomem *msic_regs_iomap;
+
+ /* spin lock to protect driver event related variables
+ * these event variables are being modified from
+ * interrupt context(msic charger callback) also.
+ */
+ spinlock_t event_lock;
+ int batt_event;
+ int charging_mode;
+ int emrg_chrg_enbl; /* Emergency call charge enable */
+ int refresh_charger; /* Refresh charger parameters */
+
+ /* Worker to monitor status and faluts */
+ struct delayed_work chr_status_monitor;
+
+ /* lock to avoid concurrent access to HW Registers.
+ * As some chargeer control and parameter registers
+ * can be read or write at same time, ipc_rw_lock lock
+ * is used to syncronize those IPC read or write calls.
+ */
+ struct mutex ipc_rw_lock;
+};
+
+
+static ssize_t set_emrg_chrg(struct device *device,
+ struct device_attribute *attr, const char *buf, size_t count);
+static ssize_t get_emrg_chrg(struct device *device,
+ struct device_attribute *attr, char *buf);
+/* Sysfs Entry for enable or disable Emergency Charging */
+static DEVICE_ATTR(emrg_charge_enable, S_IWUGO | S_IRUGO,
+ get_emrg_chrg, set_emrg_chrg);
+
+/*
+ * msic usb properties
+ */
+static enum power_supply_property msic_usb_props[] = {
+ POWER_SUPPLY_PROP_TYPE,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+/*
+ * msic battery properties
+ */
+static enum power_supply_property msic_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_AVG,
+ POWER_SUPPLY_PROP_ENERGY_FULL,
+ POWER_SUPPLY_PROP_ENERGY_NOW,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+
+static int enable_adc(struct msic_power_module_info *mbi)
+{
+ int ret;
+ uint8_t data;
+ /* enabling the VAUDA line
+ * this is a temporary workaround for MSIC issue
+ */
+ ret = intel_scu_ipc_iowrite8(MSIC_VAUDA, MSIC_VAUDA_VAL);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev,
+ "%s:VAUDA:ipc write failed\n", __func__);
+ return ret;
+ }
+
+ ret = intel_scu_ipc_ioread8(MSIC_ADC1CNTL1_ADDR, &data);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc read failed\n", __func__);
+ return ret;
+ }
+
+ data |= MSIC_CNTL1_ADC_ENBL; /*enable ADC */
+ data |= MSIC_CNTL1_RR_ENBL; /*Start Convertion */
+ ret = intel_scu_ipc_iowrite8(MSIC_ADC1CNTL1_ADDR, data);
+ if (ret)
+ dev_warn(&mbi->pdev->dev,
+ "%s:ADC CNTRL1 enabling failed\n", __func__);
+ return ret;
+}
+
+/**
+ * set_up_batt_pack_chnl - to set thermal for conversion
+ * @base_addr: index of free msic adc channel
+ * @therm: struct thermal module info
+ * Context: can sleep
+ *
+ * To set up the adc for reading thermistor
+ * and converting the same into actual temp value
+ * on the platform
+ */
+static int set_up_batt_pack_chnl(u16 ch_index,
+ struct msic_power_module_info *mbi)
+{
+ int ret;
+ u16 base_addr;
+
+ base_addr = ADC_CHNL_START_ADDR + ch_index;
+
+ /* enabling the MSIC_BATT_PACK_VOL channel */
+ ret = intel_scu_ipc_iowrite8(base_addr, MSIC_BATT_PACK_VOL);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev,
+ "%s:enabling skin therm sensor0 failed\n", __func__);
+ goto fail;
+ }
+
+ /* enabling the MSIC_BATT_PACK_CUR channel */
+ base_addr++;
+ ret = intel_scu_ipc_iowrite8(base_addr, MSIC_BATT_PACK_CUR);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev,
+ "%s:enabling skin therm sensor1 failed\n", __func__);
+ goto fail;
+ }
+
+ /* enabling the MSIC_BATT_PACK_TEMP channel */
+ base_addr++;
+ ret = intel_scu_ipc_iowrite8(base_addr, MSIC_BATT_PACK_TEMP);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev,
+ "%s:enabling sys therm sensor failed\n", __func__);
+ goto fail;
+ }
+ /*
+ * enabling the MSIC USB VBUS channel
+ * emabling stop bit for the last channel
+ */
+ base_addr++;
+ ret = intel_scu_ipc_iowrite8(base_addr,
+ MSIC_USB_VOLTAGE | MSIC_STOPBIT_MASK);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev,
+ "%s:enabling sys therm sensor failed\n", __func__);
+ goto fail;
+ }
+fail:
+ enable_adc(mbi);
+ return ret;
+}
+
+static void free_adc_channels(u16 ch_index, struct msic_power_module_info *mbi)
+{
+ int ret, i;
+ u16 base_addr;
+
+ base_addr = ADC_CHNL_START_ADDR + ch_index;
+ for (i = 0; i < 4 && base_addr < ADC_CHANLS_MAX; i++) {
+ ret = intel_scu_ipc_iowrite8(base_addr, 0x0);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc write failed\n",
+ __func__);
+ }
+ base_addr++;
+ }
+}
+
+/*
+ * reset_stopbit - sets the stop bit to 0 on the given channel
+ * @addr: address of the channel
+ */
+static int reset_stopbit(uint16_t addr)
+{
+ int ret;
+ uint8_t data;
+ ret = intel_scu_ipc_ioread8(addr, &data);
+ if (ret)
+ return ret;
+ data &= ~MSIC_STOPBIT_MASK; /* setting the stop bit to zero */
+ ret = intel_scu_ipc_iowrite8(addr, data);
+ return ret;
+}
+
+
+/*
+ * find_free_channel - finds an empty channel for conversion
+ * @mbi: struct msic power module info
+ * Context: can sleep
+ *
+ * If adc is not enabled then start using 0th channel
+ * itself. Otherwise find an empty channel by looking for
+ * one in which the stopbit is set to 1.
+ * returns the base address if succeeds,-EINVAL otherwise
+ */
+static int find_free_channel(struct msic_power_module_info *mbi)
+{
+ int ret;
+ int i;
+ uint8_t data;
+
+ /* Looping for empty channel */
+ for (i = 0; i < ADC_CHANLS_MAX; i++) {
+ ret = intel_scu_ipc_ioread8(ADC_CHNL_START_ADDR + i, &data);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc read failed\n",
+ __func__);
+ return ret;
+ }
+ if (data & MSIC_STOPBIT_MASK)
+ break;
+ }
+
+ if (i >= ADC_CHANLS_MAX-1) {
+ /* No STOP bit found, Return channel number as zero */
+ return 0;
+ }
+
+ /* Free Channels should be more than 3(VOL,CUR,TEMP) */
+ if (i > ADC_LOOP_MAX) {
+ dev_warn(&mbi->pdev->dev,
+ "%s:Cannot set up adc, no channels free : %d\n",
+ __func__, i);
+ return -EINVAL;
+ }
+
+ /*
+ * Reset STOP bit of the current channel
+ * No need to reset if the current channel index is 12
+ */
+ if (i != ADC_LOOP_MAX) {
+ ret = reset_stopbit(ADC_CHNL_START_ADDR + i);
+ if (ret) {
+ dev_err(&mbi->pdev->dev,
+ "%s:ipc r/w failed", __func__);
+ return ret;
+ }
+ }
+
+ /*
+ * i points to the current channel
+ * so retrun the next free channel
+ */
+ return i + 1;
+}
+
+/*
+ * mid_initialize_adc - initializing the adc
+ * @therm: struct thermal module info
+ * Context: can sleep
+ *
+ * Unitialize the adc for reading thermistor
+ * and converting the same into actual temp value
+ * on the platform
+ */
+static int mdf_initialize_adc(struct msic_power_module_info *mbi)
+{
+ int ret;
+ int channel_index = -1;
+
+ channel_index = find_free_channel(mbi);
+ if (channel_index < 0)
+ return channel_index;
+
+ /* Program the free ADC channel */
+ ret = set_up_batt_pack_chnl(channel_index, mbi);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "adc initialization fauled\n");
+ return ret;
+ }
+
+ return channel_index;
+}
+
+/* Check for valid Temp ADC range */
+static bool is_valid_temp_adc(int adc_val)
+{
+ if (adc_val >= MSIC_BTP_ADC_MIN && adc_val <= MSIC_BTP_ADC_MAX)
+ return true;
+ else
+ return false;
+}
+
+/* Temperature conversion Macros */
+static int conv_adc_temp(int adc_val, int adc_max, int adc_diff, int temp_diff)
+{
+ int ret;
+
+ ret = (adc_max - adc_val) * temp_diff;
+ return ret/adc_diff;
+}
+
+/* Check if the adc value is in the curve sample range */
+static bool is_valid_temp_adc_range(int val, int min, int max)
+{
+ if (val > min && val <= max)
+ return true;
+ else
+ return false;
+}
+
+static int adc_to_temp(uint16_t adc_val)
+{
+ int temp;
+ int i;
+
+ if (!is_valid_temp_adc(adc_val))
+ return -ERANGE;
+
+ for (i = 0; i < THERM_CURVE_MAX_SAMPLES; i++) {
+ /* linear approximation for battery pack temperature*/
+ if (is_valid_temp_adc_range(adc_val, therm_curve_data[i][3],
+ therm_curve_data[i][2])) {
+
+ temp = conv_adc_temp(adc_val, therm_curve_data[i][2],
+ therm_curve_data[i][2]-therm_curve_data[i][3],
+ therm_curve_data[i][0]-therm_curve_data[i][1]);
+
+ temp += therm_curve_data[i][1];
+ break;
+ }
+ }
+
+ if (i >= THERM_CURVE_MAX_SAMPLES)
+ dev_warn(msic_dev, "Invalid temp adc range\n");
+
+ /*convert tempertaure in celsius to milli degree celsius*/
+ return temp * 1000;
+}
+
+static int mdf_read_adc_regs(int sensor,
+ struct msic_power_module_info *mbi)
+{
+ uint16_t adc_val = 0, addr;
+ uint8_t data;
+ int ret;
+
+ /*
+ * After setting or enabling the ADC control register
+ * it should not be modified untll we read the ADC value
+ * through ADC DATA regs. Using the ipc rw lock we are
+ * ensuring all ADC ipc call are performed in a proper sequence
+ */
+ mutex_lock(&mbi->ipc_rw_lock);
+ ret = intel_scu_ipc_ioread8(MSIC_ADC1CNTL3_ADDR, &data);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc write failed\n",
+ __func__);
+ goto ipc_failed;;
+ }
+
+ /* enable the msic for conversion before reading */
+ ret = intel_scu_ipc_iowrite8(MSIC_ADC1CNTL3_ADDR,
+ data | MSIC_CNTL3_ADCRRDATA_ENBL);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc write failed\n",
+ __func__);
+ goto ipc_failed;;
+ }
+
+ /* re-toggle the RRDATARD bit
+ * temporary workaround */
+ ret = intel_scu_ipc_iowrite8(MSIC_ADC1CNTL3_ADDR,
+ data | MSIC_CNTL3_ADCTHERM_ENBL);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc write failed",
+ __func__);
+ goto ipc_failed;;
+ }
+
+ /* reading the higher bits of data */
+ addr = ADC_DATA_START_ADDR+2*(mbi->adc_index + sensor);
+ ret = intel_scu_ipc_ioread8(addr, &data);
+ if (ret) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc read failed", __func__);
+ goto ipc_failed;;
+ }
+ /* shifting bits to accomodate the lower two data bits */
+ adc_val = (data << 2);
+ addr++;
+ ret = intel_scu_ipc_ioread8(addr, &data);/* reading lower bits */
+ if (ret)
+ dev_warn(&mbi->pdev->dev, "%s:ipc read failed", __func__);
+
+ipc_failed:
+ mutex_unlock(&mbi->ipc_rw_lock);
+ if (ret)
+ return ret;
+ /*adding lower two bits to the higher bits*/
+ data &= 0x3;
+ adc_val += data;
+
+ switch (sensor) {
+ case MSIC_ADC_VOL_IDX:
+ ret = MSIC_ADC_TO_VOL(adc_val);
+ break;
+ case MSIC_ADC_CUR_IDX:
+ ret = MSIC_ADC_TO_CUR(adc_val & 0x1FF);
+ /* if D9 bit is set battery is discharging */
+ if (adc_val & 0x200)
+ ret = -(MSIC_ADC_MAX_CUR - ret);
+ break;
+ case MSIC_ADC_TEMP_IDX:
+ ret = adc_to_temp(adc_val);
+ break;
+ case MSIC_ADC_USB_VOL_IDX:
+ ret = MSIC_ADC_TO_VBUS_VOL(adc_val);
+ break;
+ default:
+ dev_err(&mbi->pdev->dev, "invalid adc_code:%d", adc_val);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static unsigned int msic_read_coloumb_ctr(void)
+{
+ int err;
+ uint32_t cvalue;
+
+ /* determine other parameters */
+ err = intel_scu_ipc_command(IPCMSG_BATTERY, 0x01, NULL, 0, &cvalue, 1);
+ if (err)
+ dev_warn(msic_dev, "IPC Command Failed %s\n", __func__);
+
+ return cvalue;
+}
+static unsigned int cc_to_coloumbs(unsigned int cc_val)
+{
+ unsigned int coloumbs = 0;
+
+ /* Every LSB of cc adc bit equal to 95.37uC
+ * Approxmating it to 95uC
+ */
+ coloumbs = (cc_val & MSIC_BATT_ADC_ACCCHRGVAL_MASK) * 95;
+
+ /* return in milli coloumbs */
+ return coloumbs / 1000;
+}
+
+static unsigned int msic_get_charge_now(void)
+{
+ unsigned int temp_val, coloumbs;
+
+ temp_val = msic_read_coloumb_ctr();
+ coloumbs = cc_to_coloumbs(temp_val);
+
+ /*
+ * Convert the milli Coloumbs into mAh
+ * 1 mAh = 3600 mC
+ */
+ return coloumbs / COLMB_TO_MAHRS_CONV_FCTR;
+}
+
+/**
+ * msic_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
+ *
+ * MSIC usb power source property needs to be provided to power_supply
+ * subsytem for it to provide the information to users.
+ */
+static int msic_usb_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct msic_power_module_info *mbi = container_of(psy,
+ struct msic_power_module_info, usb);
+
+ mutex_lock(&mbi->usb_chrg_lock);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = mbi->usb_chrg_props.charger_present;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = mbi->usb_chrg_props.charger_health;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ mbi->usb_chrg_props.vbus_vol =
+ mdf_read_adc_regs(MSIC_ADC_USB_VOL_IDX, mbi);
+ val->intval = mbi->usb_chrg_props.vbus_vol * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = mbi->usb_chrg_props.charger_type;
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = mbi->usb_chrg_props.charger_model;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = mbi->usb_chrg_props.charger_vender;
+ break;
+ default:
+ mutex_unlock(&mbi->usb_chrg_lock);
+ return -EINVAL;
+ }
+
+ mutex_unlock(&mbi->usb_chrg_lock);
+ return 0;
+}
+
+static unsigned int mdf_cal_avg(unsigned int avg)
+{
+ unsigned int charge_now;
+
+ charge_now = msic_read_coloumb_ctr();
+
+ /* Conver charge now to mAh */
+ avg += cc_to_coloumbs(charge_now) / COLMB_TO_MAHRS_CONV_FCTR;
+
+ return avg / 2;
+}
+
+static unsigned int chrg_to_vol_lookup(unsigned int chrg)
+{
+ int ch_diff, ch_total_diff, volt_total_diff, i;
+ unsigned int volt;
+
+ /* Find the index of most nearest charge value */
+ for (i = 0; i < DISCHRG_CURVE_MAX_SAMPLES; i++) {
+ if (chrg < dischargeCurve[i][1])
+ continue;
+ else
+ break;
+ }
+
+ if (i >= DISCHRG_CURVE_MAX_SAMPLES) {
+ dev_dbg(msic_dev, "charge out of range\n");
+ return 0;
+ }
+
+ if ((i == 0) || (chrg == dischargeCurve[i][1]))
+ return dischargeCurve[i][0];
+
+ /* Linear approximation of the charge to voltage */
+ ch_diff = chrg - dischargeCurve[i][1];
+ ch_total_diff = dischargeCurve[i-1][1] - dischargeCurve[i][1];
+ volt_total_diff = dischargeCurve[i-1][0] - dischargeCurve[i][0];
+
+ volt = dischargeCurve[i][0] +
+ (ch_diff * volt_total_diff) / ch_total_diff;
+
+ return volt;
+}
+
+static unsigned int msic_read_energy_now(struct msic_power_module_info *mbi)
+{
+ unsigned int vltg, chrg;
+
+ /* Read CC register value */
+ chrg = msic_read_coloumb_ctr();
+ /* Covert to milli coloumbs */
+ chrg = cc_to_coloumbs(chrg);
+
+ /* get voltage form lookup table */
+ vltg = chrg_to_vol_lookup(chrg);
+
+ /* Convert from mColoumbs to mAh */
+ chrg = chrg / COLMB_TO_MAHRS_CONV_FCTR;
+
+ return (vltg * chrg) / 1000;
+}
+
+static int read_avg_ibatt(struct msic_power_module_info *mbi)
+{
+ int i, ibatt[HYSTR_SAMPLE_MAX], ibatt_avg = 0;
+
+ /* Measure battey average current */
+ for (i = 0; i < HYSTR_SAMPLE_MAX; i++) {
+ ibatt[i] = mdf_read_adc_regs(MSIC_ADC_CUR_IDX, mbi);
+ ibatt_avg += ibatt[i];
+ }
+ ibatt_avg = ibatt_avg / HYSTR_SAMPLE_MAX;
+
+ return ibatt_avg;
+}
+
+static unsigned int calculate_batt_capacity(struct msic_power_module_info *mbi)
+{
+ int vocv, vbatt, ibatt;
+ unsigned int cap_perc;
+
+ vbatt = mdf_read_adc_regs(MSIC_ADC_VOL_IDX, mbi);
+ ibatt = read_avg_ibatt(mbi);
+
+ vocv = vbatt - (ibatt * MSIC_CHRG_RBATT_VAL) / 1000;
+
+ /* Temporary fix for calculating capacity.
+ * will be modified once Coloumb Counter
+ * works correctly.
+ */
+ vocv = vocv - BATT_DEAD_CUTOFF_VOLT;
+ if (vocv < 0)
+ vocv = 0;
+
+ cap_perc = (vocv * 100) / (mbi->batt_props.vol_max_des -
+ BATT_DEAD_CUTOFF_VOLT);
+
+ /* vocv can be slighlty more than voltage
+ * max value if the ibatt is -ve and vbatt
+ * has reached a maximum value.
+ */
+ if (cap_perc > 100)
+ cap_perc = 100;
+
+ return cap_perc;
+}
+
+static int msic_read_capacity_level(struct msic_power_module_info *mbi)
+{
+ int cap_perc, cap_level;
+
+ /* Calculate % of charge left */
+ cap_perc = calculate_batt_capacity(mbi);
+
+ /*
+ * 0, 15, 40, 85 threshold cut-offs are temporary
+ * actuall thresholds will be read from SMIP header
+ */
+ if (cap_perc >= 0 && cap_perc < 15)
+ cap_level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ else if (cap_perc >= 15 && cap_perc < 40)
+ cap_level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ else if (cap_perc >= 40 && cap_perc < 85)
+ cap_level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ else if (cap_perc >= 85 && cap_perc < 100)
+ cap_level = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
+ else if (cap_perc == 100)
+ cap_level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else
+ cap_level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+
+ return cap_level;
+}
+
+/**
+ * msic_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
+ *
+ * MSIC battery power source property needs to be provided to power_supply
+ * subsytem for it to provide the information to users.
+ */
+static int msic_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct msic_power_module_info *mbi = container_of(psy,
+ struct msic_power_module_info, batt);
+
+ /*
+ * All voltages, currents, charges, energies, time and temperatures
+ * in uV, ÂA, ÂAh, ÂWh, seconds and tenths of degree Celsius un
+ * less otherwise stated. It's driver's job to convert its raw values
+ * to units in which this class operates.
+ */
+
+ mutex_lock(&mbi->batt_lock);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = mbi->batt_props.status;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = mbi->batt_props.health;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = mbi->batt_props.present;
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = mbi->batt_props.technology;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = mbi->batt_props.vol_max_des * 1000;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ mbi->batt_props.vol_now =
+ mdf_read_adc_regs(MSIC_ADC_VOL_IDX, mbi);
+ val->intval = mbi->batt_props.vol_now * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ mbi->batt_props.cur_now =
+ mdf_read_adc_regs(MSIC_ADC_CUR_IDX, mbi);
+ val->intval = mbi->batt_props.cur_now * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ mbi->batt_props.charge_now = msic_get_charge_now();
+ val->intval = mbi->batt_props.charge_now * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ mbi->batt_props.charge_ctr = msic_read_coloumb_ctr();
+ val->intval = mbi->batt_props.charge_ctr;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ val->intval = mbi->batt_props.charge_full * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_AVG:
+ mbi->batt_props.charge_avg =
+ mdf_cal_avg(mbi->batt_props.charge_avg);
+ val->intval = mbi->batt_props.charge_avg * 1000;
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_FULL:
+ val->intval = mbi->batt_props.energy_full * 1000;
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_NOW:
+ mbi->batt_props.energy_now = msic_read_energy_now(mbi);
+ val->intval = mbi->batt_props.energy_now * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ mbi->batt_props.capacity_level = msic_read_capacity_level(mbi);
+ val->intval = mbi->batt_props.capacity_level;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ mbi->batt_props.capacity = calculate_batt_capacity(mbi);
+ val->intval = mbi->batt_props.capacity;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ mbi->batt_props.temperature =
+ mdf_read_adc_regs(MSIC_ADC_TEMP_IDX, mbi);
+ val->intval = mbi->batt_props.temperature * 1000;
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = mbi->batt_props.model;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = mbi->batt_props.vender;
+ break;
+ default:
+ mutex_unlock(&mbi->batt_lock);
+ return -EINVAL;
+ }
+
+ mutex_unlock(&mbi->batt_lock);
+
+ return 0;
+}
+
+static ssize_t set_emrg_chrg(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct platform_device *pdev = container_of(dev,
+ struct platform_device, dev);
+ struct msic_power_module_info *mbi = platform_get_drvdata(pdev);
+ unsigned long value;
+
+ if (strict_strtoul(buf, 10, &value))
+ return -EINVAL;
+
+ spin_lock(&mbi->event_lock);
+ if (value)
+ mbi->emrg_chrg_enbl = true;
+ else
+ mbi->emrg_chrg_enbl = false;
+ mbi->refresh_charger = 1;
+ spin_unlock(&mbi->event_lock);
+
+ /* As the emergency charging state is changed
+ * execute the worker as early as possible
+ * if the worker is pending on timer.
+ */
+ flush_delayed_work(&mbi->connect_handler);
+ return count;
+}
+static ssize_t get_emrg_chrg(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct platform_device *pdev = container_of(dev,
+ struct platform_device, dev);
+ struct msic_power_module_info *mbi = platform_get_drvdata(pdev);
+ unsigned int val;
+
+ spin_lock(&mbi->event_lock);
+ val = mbi->emrg_chrg_enbl;
+ spin_unlock(&mbi->event_lock);
+
+ return sprintf(buf, "%d\n", val);
+}
+
+
+/**
+ * msic_log_exception_event - log battery events
+ * @event: msic event to be logged
+ * Context: can sleep
+ *
+ * There are multiple battery and internal charger events
+ * which may be of interest to users.
+ * this battery function logs the different events onto the
+ * kernel log messages.
+ */
+static void msic_log_exception_event(enum msic_event event)
+{
+ switch (event) {
+ case MSIC_EVENT_BATTOCP_EXCPT:
+ dev_warn(msic_dev,
+ "over battery charge current condition detected\n");
+ break;
+ case MSIC_EVENT_BATTOTP_EXCPT:
+ dev_warn(msic_dev,
+ "high battery temperature condition detected\n");
+ break;
+ case MSIC_EVENT_LOWBATT_EXCPT:
+ dev_warn(msic_dev,
+ "Low battery voltage condition detected\n");
+ break;
+ case MSIC_EVENT_BATTOVP_EXCPT:
+ dev_warn(msic_dev,
+ "battery overvoltage condition detected\n");
+ break;
+ case MSIC_EVENT_CHROTP_EXCPT:
+ dev_warn(msic_dev,
+ "charger high temperature condition detected\n");
+ break;
+ case MSIC_EVENT_USBOVP_EXCPT:
+ dev_warn(msic_dev, "USB over voltage condition detected\n");
+ break;
+ case MSIC_EVENT_USB_VINREG_EXCPT:
+ dev_warn(msic_dev, "USB Input voltage regulation "
+ "condition detected\n");
+ break;
+ case MSIC_EVENT_WEAKVIN_EXCPT:
+ dev_warn(msic_dev, "USB Weak VBUS volatge "
+ "condition detected\n");
+ break;
+ case MSIC_EVENT_TIMEEXP_EXCPT:
+ dev_warn(msic_dev, "Charger Total Time Expiration "
+ "condition detected\n");
+ break;
+ default:
+ dev_warn(msic_dev, "unknown error %u detected\n", event);
+ break;
+ }
+}
+
+/**
+ * msic_handle_exception - handle any exception scenario
+ * @mbi: device info structure to update the information
+ * Context: can sleep
+ *
+ */
+
+static void msic_handle_exception(struct msic_power_module_info *mbi,
+ uint8_t CHRINT_reg_value, uint8_t CHRINT1_reg_value)
+{
+ enum msic_event exception;
+
+ /* Battery Events */
+ mutex_lock(&mbi->batt_lock);
+ if (CHRINT_reg_value & MSIC_BATT_CHR_BATTOCP_MASK) {
+ exception = MSIC_EVENT_BATTOCP_EXCPT;
+ msic_log_exception_event(exception);
+ }
+
+ if (CHRINT_reg_value & MSIC_BATT_CHR_BATTOTP_MASK) {
+ mbi->batt_props.health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ exception = MSIC_EVENT_BATTOTP_EXCPT;
+ msic_log_exception_event(exception);
+ }
+
+ if (CHRINT_reg_value & MSIC_BATT_CHR_LOWBATT_MASK) {
+ mbi->batt_props.health = POWER_SUPPLY_HEALTH_DEAD;
+ exception = MSIC_EVENT_LOWBATT_EXCPT;
+ msic_log_exception_event(exception);
+ }
+ if (CHRINT_reg_value & MSIC_BATT_CHR_TIMEEXP_MASK) {
+ exception = MSIC_EVENT_TIMEEXP_EXCPT;
+ msic_log_exception_event(exception);
+ }
+
+ if (CHRINT1_reg_value & MSIC_BATT_CHR_BATTOVP_MASK) {
+ mbi->batt_props.health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ exception = MSIC_EVENT_BATTOVP_EXCPT;
+ msic_log_exception_event(exception);
+ }
+ mutex_unlock(&mbi->batt_lock);
+
+ /* Charger Events */
+ mutex_lock(&mbi->usb_chrg_lock);
+ if (CHRINT1_reg_value & MSIC_BATT_CHR_CHROTP_MASK) {
+ exception = MSIC_EVENT_CHROTP_EXCPT;
+ msic_log_exception_event(exception);
+ }
+
+ if (CHRINT1_reg_value & MSIC_BATT_CHR_USBOVP_MASK) {
+ mbi->usb_chrg_props.charger_health =
+ POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ exception = MSIC_EVENT_USBOVP_EXCPT;
+ msic_log_exception_event(exception);
+ }
+ if (CHRINT1_reg_value & MSIC_BATT_CHR_WKVINDET_MASK) {
+ mbi->usb_chrg_props.charger_health =
+ POWER_SUPPLY_HEALTH_DEAD;
+ exception = MSIC_EVENT_WEAKVIN_EXCPT;
+ msic_log_exception_event(exception);
+ }
+ if (CHRINT1_reg_value & MSIC_BATT_CHR_VINREGMINT_MASK) {
+ mbi->usb_chrg_props.charger_health =
+ POWER_SUPPLY_HEALTH_DEAD;
+ exception = MSIC_EVENT_USB_VINREG_EXCPT;
+ msic_log_exception_event(exception);
+ }
+ mutex_unlock(&mbi->usb_chrg_lock);
+
+ if (CHRINT1_reg_value || (CHRINT_reg_value &
+ ~(MSIC_BATT_CHR_LOWBATT_MASK))) {
+ mutex_lock(&mbi->batt_lock);
+ if ((mbi->batt_props.status == POWER_SUPPLY_STATUS_CHARGING) ||
+ (mbi->batt_props.status == POWER_SUPPLY_STATUS_FULL))
+ mbi->batt_props.status =
+ POWER_SUPPLY_STATUS_NOT_CHARGING;
+ mutex_unlock(&mbi->batt_lock);
+ }
+}
+
+/**
+ * msic_write_multi - multi-write helper
+ * @mbi: msic power module
+ * @address: addresses of IPC writes
+ * @data: data for IPC writes
+ * @n: size of write table
+ *
+ * Write a series of values to the SCU while respecting the ipc_rw_lock
+ * across the entire sequence. Handle any error reporting and pass back
+ * error codes on failure
+ */
+static int msic_write_multi(struct msic_power_module_info *mbi,
+ const u16 *address, const u8 *data, int n)
+{
+ int retval = 0, i;
+ mutex_lock(&mbi->ipc_rw_lock);
+ for (i = 0; i < n; i++) {
+ retval = intel_scu_ipc_iowrite8(*address++, *data++);
+ if (retval) {
+ dev_warn(&mbi->pdev->dev, "%s:ipc msic write failed\n",
+ __func__);
+ break;
+ }
+ }
+ mutex_unlock(&mbi->ipc_rw_lock);
+ return retval;
+}
+
+static int ipc_read_modify_chr_param_reg(struct msic_power_module_info *mbi,
+ uint16_t addr, uint8_t val, int set)
+{
+ int ret = 0;
+ static u16 address[2] = {
+ MSIC_BATT_CHR_WDTWRITE_ADDR, 0
+ };
+ static u8 data[2] = {
+ WDTWRITE_UNLOCK_VALUE, 0
+ };
+
+ address[1] = addr;
+
+ /* Unlock Charge parameter registers before reading */
+ ret = intel_scu_ipc_iowrite8(address[0], data[0]);
+ if (ret) {
+ dev_warn(msic_dev, "%s:ipc write failed\n", __func__);
+ return ret;
+ }
+
+ ret = intel_scu_ipc_ioread8(address[1], &data[1]);
+ if (ret) {
+ dev_warn(msic_dev, "%s:ipc read failed\n", __func__);
+ return ret;
+ }
+
+ if (set)
+ data[1] |= val;
+ else
+ data[1] &= (~val);
+
+ return msic_write_multi(mbi, address, data, 2);
+}
+
+static int msic_batt_stop_charging(struct msic_power_module_info *mbi)
+{
+ static const u16 address[] = {
+ MSIC_BATT_CHR_WDTWRITE_ADDR,
+ MSIC_BATT_CHR_CHRCTRL_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR,
+ MSIC_BATT_CHR_CHRSTWDT_ADDR,
+ };
+ static const u8 data[] = {
+ WDTWRITE_UNLOCK_VALUE, /* Unlock chrg params */
+ CHRCNTL_CHRG_DISABLE, /* Disable Charging */
+ WDTWRITE_UNLOCK_VALUE, /* Unlock chrg params */
+ CHR_WDT_DISABLE, /* Disable WDT Timer */
+ };
+
+ /*
+ * Charger connect handler delayed work also modifies the
+ * MSIC charger parameter registers.To avoid concurrent
+ * read writes to same set of registers locking applied by
+ * msic_write_multi
+ */
+ return msic_write_multi(mbi, address, data, 4);
+}
+
+/**
+ * msic_batt_do_charging - set battery charger
+ * @mbi: device info structure
+ * @chrg: charge mode to set battery charger in
+ * Context: can sleep
+ *
+ * MsIC battery charger needs to be enabled based on the charger
+ * capabilities connected to the platform.
+ */
+static int msic_batt_do_charging(struct msic_power_module_info *mbi,
+ struct charge_params *params, int is_maint_mode)
+{
+ int retval;
+ static u8 data[] = {
+ WDTWRITE_UNLOCK_VALUE, 0,
+ WDTWRITE_UNLOCK_VALUE, 0,
+ WDTWRITE_UNLOCK_VALUE, 0,
+ WDTWRITE_UNLOCK_VALUE, CHR_WDT_SET_60SEC
+ };
+ static const u16 address[] = {
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRCCURRENT_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRCVOLTAGE_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRCTRL_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRSTWDT_ADDR
+ };
+
+ data[1] = params->ccur;
+ data[3] = params->cvol; /* charge voltage 4.14V */
+ data[5] = params->vinilmt;
+
+ /*
+ * Charger disconnect handler also modifies the
+ * MSIC charger parameter registers.To avoid concurrent
+ * read writes to same set of registers locking applied
+ */
+ retval = msic_write_multi(mbi, address, data, 8);
+ if (retval < 0)
+ return retval;
+
+ dev_dbg(msic_dev, "Charger Enabled\n");
+
+ mutex_lock(&mbi->batt_lock);
+ if (is_maint_mode)
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_FULL;
+ else
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_CHARGING;
+ mbi->batt_props.health = POWER_SUPPLY_HEALTH_GOOD;
+ mutex_unlock(&mbi->batt_lock);
+
+ mutex_lock(&mbi->usb_chrg_lock);
+ mbi->usb_chrg_props.charger_health = POWER_SUPPLY_HEALTH_GOOD;
+ mbi->usb_chrg_props.charger_present = MSIC_USB_CHARGER_PRESENT;
+ memcpy(mbi->usb_chrg_props.charger_model, "msic", sizeof("msic"));
+ memcpy(mbi->usb_chrg_props.charger_vender, "Intel", sizeof("Intel"));
+
+ if (mbi->ch_params.vinilmt == CHRG_CURR_SDP_LOW)
+ mbi->usb_chrg_props.charger_type =
+ POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ else
+ mbi->usb_chrg_props.charger_type =
+ POWER_SUPPLY_CHARGE_TYPE_FAST;
+
+ if (mbi->ch_params.chrg_type == CHRG_CDP)
+ mbi->usb.type = POWER_SUPPLY_TYPE_USB_CDP;
+ else if (mbi->ch_params.chrg_type == CHRG_DCP)
+ mbi->usb.type = POWER_SUPPLY_TYPE_USB_DCP;
+ else if (mbi->ch_params.chrg_type == CHRG_ACA)
+ mbi->usb.type = POWER_SUPPLY_TYPE_USB_ACA;
+ else
+ mbi->usb.type = POWER_SUPPLY_TYPE_USB;
+ mutex_unlock(&mbi->usb_chrg_lock);
+ return 0;
+}
+
+static void reset_wdt_timer(struct msic_power_module_info *mbi)
+{
+ static const u16 address[2] = {
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRSTWDT_ADDR
+ };
+ static const u8 data[2] = {
+ WDTWRITE_UNLOCK_VALUE, CHR_WDT_SET_60SEC
+ };
+
+ /*
+ * Charger disconnect handler also modifies the
+ * MSIC charger parameter registers.To avoid concurrent
+ * read writes to same set of registers locking applied
+ */
+ msic_write_multi(mbi, address, data, 2);
+}
+
+static void msic_update_disconn_status(struct msic_power_module_info *mbi)
+{
+ int event;
+
+ spin_lock(&mbi->event_lock);
+ event = mbi->batt_event;
+ spin_unlock(&mbi->event_lock);
+
+ mutex_lock(&mbi->usb_chrg_lock);
+ mbi->usb_chrg_props.charger_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ memcpy(mbi->usb_chrg_props.charger_model, "Unknown", sizeof("Unknown"));
+ memcpy(mbi->usb_chrg_props.charger_vender, "Unknown",
+ sizeof("Unknown"));
+ if (event == USBCHRG_EVENT_SUSPEND) {
+ mbi->usb_chrg_props.charger_type =
+ POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+ mbi->usb_chrg_props.charger_present =
+ MSIC_USB_CHARGER_PRESENT;
+ } else {
+ mbi->usb_chrg_props.charger_type =
+ POWER_SUPPLY_CHARGE_TYPE_NONE;
+ mbi->usb_chrg_props.charger_present =
+ MSIC_USB_CHARGER_NOT_PRESENT;
+ mbi->usb.type = POWER_SUPPLY_TYPE_USB;
+ }
+ mutex_unlock(&mbi->usb_chrg_lock);
+
+ mutex_lock(&mbi->batt_lock);
+ if (event == USBCHRG_EVENT_SUSPEND) {
+ mbi->batt_props.status =
+ POWER_SUPPLY_STATUS_NOT_CHARGING;
+ } else {
+ mbi->batt_props.status =
+ POWER_SUPPLY_STATUS_DISCHARGING;
+ }
+ mutex_unlock(&mbi->batt_lock);
+
+ power_supply_changed(&mbi->batt);
+}
+
+static int check_charge_full(struct msic_power_module_info *mbi, int vref)
+{
+ static int vbat_prev[HYSTR_SAMPLE_MAX];
+ int vflag, vbat, vbat_diff, vocv, i;
+ int ibatt_avg, is_full = false;
+
+ /* Read battey vbatt */
+ vbat = mdf_read_adc_regs(MSIC_ADC_VOL_IDX, mbi);
+ /* Read battery current */
+ ibatt_avg = read_avg_ibatt(mbi);
+
+ /* Check the Vbat is consitant with in the range */
+ for (i = 0; i < HYSTR_SAMPLE_MAX; i++) {
+ vbat_diff = vbat - vbat_prev[i];
+ if (vbat_diff >= -20 && vbat_diff <= 20)
+ continue;
+ else
+ break;
+ }
+
+ if (i >= HYSTR_SAMPLE_MAX)
+ vflag = true;
+ else
+ vflag = false;
+
+ /*
+ * Rbatt value should be read from SMIP header but as a
+ * temporary fix we are hardcoding the Rbatt as 180 mOhms
+ */
+ vocv = vbat - (ibatt_avg * MSIC_CHRG_RBATT_VAL)/1000;
+ dev_dbg(msic_dev, "vocv:%d vbat:%d\n", vocv, vbat);
+
+ /*
+ * Check if Vbat is equal to max charge voltage and
+ * charge rate is less than or equal to 0.05 coloumbs
+ */
+ if (vflag && (vocv >= (vref - BATT_ADC_VOLT_ERROR))) {
+ dev_dbg(msic_dev, "Charge Full Detected\n");
+ /* Disable Charging */
+ msic_batt_stop_charging(mbi);
+ is_full = true;
+ }
+
+ /* Push the array with latest value */
+ for (i = HYSTR_SAMPLE_MAX - 1; i > 0; i--)
+ vbat_prev[i] = vbat_prev[i-1];
+ vbat_prev[0] = vbat;
+
+ return is_full;
+}
+
+static bool is_maint_cutoff_vol(int adc_volt)
+{
+ static int vmaint_prev[HYSTR_SAMPLE_MAX];
+ int i;
+ bool flag;
+
+ /* Check whether the voltage is droping
+ * consistantly to enable maintenence charging
+ */
+ for (i = 0; i < HYSTR_SAMPLE_MAX; i++) {
+ if (adc_volt < vmaint_prev[i])
+ continue;
+ else
+ break;
+ }
+
+ if (i >= HYSTR_SAMPLE_MAX)
+ flag = true;
+ else
+ flag = false;
+
+ /* Push the array with latest value */
+ for (i = HYSTR_SAMPLE_MAX - 1; i > 0; i--)
+ vmaint_prev[i] = vmaint_prev[i-1];
+ vmaint_prev[0] = adc_volt;
+
+ return flag;
+}
+
+static void calculate_charge_cycles(struct msic_power_module_info *mbi,
+ bool start_bit)
+{
+ static unsigned int chr_prev;
+ unsigned int chr_now, chr_now_ctr, chr_prev_ctr = 0;
+
+ if (start_bit)
+ chr_prev = 0;
+
+ chr_now = msic_read_coloumb_ctr();
+ chr_now_ctr = cc_to_coloumbs(chr_now);
+
+ chr_prev_ctr = cc_to_coloumbs(chr_prev);
+
+ /* count inflow charge given by charger */
+ if (!chr_prev)
+ chr_clmb_ctr += chr_now_ctr - chr_prev_ctr;
+
+ if (chr_clmb_ctr >= CHARGE_FULL_IN_MAH) {
+ charge_cycle_ctr++;
+ chr_clmb_ctr = 0;
+ }
+ chr_prev = chr_now;
+}
+
+/**
+* msic_batt_temp_charging - manages the charging based on temperature
+* @charge_param: charging parameter
+* @sfi_table: SFI table structure
+*
+* To manage the charging based on the
+* temperature of the battery
+*/
+static void msic_batt_temp_charging(struct work_struct *work)
+{
+ int ret, i, charge_now, is_maint_chrg = false, is_lowchrg_enbl;
+ static int iprev = -1, is_chrg_enbl;
+ short int cv = 0, cc = 0, vinlimit = 0, cvref;
+ int adc_temp, adc_vol;
+ struct charge_params charge_param;
+ struct msic_power_module_info *mbi = container_of(work,
+ struct msic_power_module_info, connect_handler.work);
+ struct temperature_monitoring_range *temp_mon = NULL;
+
+ memset(&charge_param, 0x0, sizeof(struct charge_params));
+ charge_param.vinilmt = mbi->ch_params.vinilmt;
+ charge_param.chrg_type = mbi->ch_params.chrg_type;
+
+ spin_lock(&mbi->event_lock);
+ if (mbi->refresh_charger) {
+ /*
+ * If the the charger type is unknown or None
+ * better start the charging again and compute
+ * the properties again.
+ */
+ mbi->refresh_charger = 0;
+ iprev = -1;
+ is_chrg_enbl = false;
+ }
+ spin_unlock(&mbi->event_lock);
+
+ ret = mdf_read_adc_regs(MSIC_ADC_TEMP_IDX, mbi);
+ /* mdf_read_adc_regs returns in milli Centigrade */
+ adc_temp = ret / 1000;
+
+ for (i = 0; i < sfi_table->temp_mon_ranges; i++) {
+ if ((adc_temp >= sfi_table->temp_mon_range[i].temp_low_lim) &&
+ (adc_temp < sfi_table->temp_mon_range[i].temp_up_lim)) {
+
+ cv = sfi_table->temp_mon_range[i].full_chrg_vol;
+ cc = sfi_table->temp_mon_range[i].full_chrg_cur;
+ cvref = cv;
+
+ /* D7,D6 bits of CHRCNTL will set the VINILMT */
+ if (charge_param.vinilmt > 950)
+ vinlimit = 0xC0; /* VINILMT set to No Limit */
+ else if (charge_param.vinilmt > 500)
+ vinlimit = 0x80; /* VINILMT set to 950mA */
+ else if (charge_param.vinilmt > 100)
+ vinlimit = 0x40; /* VINILMT set to 500mA */
+ else
+ vinlimit = 0x00; /* VINILMT set to 100mA */
+
+ break;
+ }
+ }
+
+ if (i >= sfi_table->temp_mon_ranges) {
+ dev_warn(msic_dev, "TEMP RANGE NOT EXIST\n");
+ /*
+ * If we are in middle of charge cycle is safer to Reset WDT
+ * Timer Register.Because battery temperature and Changre
+ * status register are not related.
+ */
+ reset_wdt_timer(mbi);
+ goto lbl_sched_work;
+ }
+
+ /*
+ * Check for Charge full condition and set the battery
+ * properties accordingly. Also check for charging mode
+ * whether it is normal or maintenence mode.
+ */
+ spin_lock(&mbi->event_lock);
+ if (mbi->charging_mode == BATT_CHARGING_MODE_MAINTAINENCE) {
+ cvref = sfi_table->temp_mon_range[i].maint_chrg_vol_ul;
+ is_maint_chrg = true;
+ }
+ spin_unlock(&mbi->event_lock);
+
+ ret = check_charge_full(mbi, cvref);
+ if (ret) {
+ is_chrg_enbl = false;
+ if (!is_maint_chrg) {
+ dev_dbg(msic_dev, "Going to Maintenence CHRG Mode\n");
+
+ spin_lock(&mbi->event_lock);
+ mbi->charging_mode = BATT_CHARGING_MODE_MAINTAINENCE;
+ spin_unlock(&mbi->event_lock);
+
+ mutex_lock(&mbi->batt_lock);
+ charge_now = msic_read_coloumb_ctr();
+ mbi->batt_props.charge_full =
+ cc_to_coloumbs(charge_now);
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_FULL;
+ mutex_unlock(&mbi->batt_lock);
+
+ is_maint_chrg = true;
+ power_supply_set_battery_charged(&mbi->batt);
+ }
+ }
+
+ /*
+ * If we are in same Temparature range check for check for the
+ * maintainence charging mode and enable the charging depending
+ * on the voltage.If Temparature range is changed then anyways
+ * we need to set charging parameters and enable charging.
+ */
+ if (i == iprev) {
+ /*
+ * Check if the voltage falls below lower threshold
+ * if we are in maintenence mode charging.
+ */
+ if (is_maint_chrg && !is_chrg_enbl) {
+ temp_mon = &sfi_table->temp_mon_range[i];
+ /* Read battery Voltage */
+ adc_vol = mdf_read_adc_regs(MSIC_ADC_VOL_IDX, mbi);
+
+ /* Cosidering ADC error of BATT_ADC_VOLT_ERROR */
+ if ((adc_vol + 20) <= temp_mon->maint_chrg_vol_ll &&
+ is_maint_cutoff_vol(adc_vol)) {
+ dev_dbg(msic_dev, "restart charging\n");
+ cv = temp_mon->maint_chrg_vol_ul;
+ } else {
+ dev_dbg(msic_dev, "vbat is more than ll\n");
+ goto lbl_sched_work;
+ }
+ } else {
+ /* count charge cycles */
+ calculate_charge_cycles(mbi, false);
+ /* Reset WDT Timer Register for 60 Sec */
+ reset_wdt_timer(mbi);
+ goto lbl_sched_work;
+ }
+ }
+
+ iprev = i;
+ charge_param.cvol = CONV_VOL_DEC_MSICREG(cv);
+
+ cc = cc - 550;
+ if (cc <= 0)
+ cc = 0;
+ else
+ cc = cc / 100;
+ cc = cc << 3;
+
+ charge_param.ccur = cc;
+ charge_param.vinilmt = vinlimit;
+
+ dev_dbg(msic_dev, "params vol: %x cur:%x vinilmt:%x\n",
+ charge_param.cvol, charge_param.ccur, charge_param.vinilmt);
+ /*
+ * Check if emergency charging is not enabled and temperarure is < 0
+ * limit the charging current to LOW CHARGE (325 mA) else
+ * allow the charging as set in charge current register
+ */
+ spin_lock(&mbi->event_lock);
+ if (!mbi->emrg_chrg_enbl && (adc_temp < 0)) {
+ dev_dbg(msic_dev, "Emergency Charging Enabled\n");
+ is_lowchrg_enbl = BIT_SET;
+ } else {
+ dev_dbg(msic_dev, "Emergency Charging Not Enabled\n");
+ is_lowchrg_enbl = BIT_RESET;
+ }
+ spin_unlock(&mbi->event_lock);
+
+ ipc_read_modify_chr_param_reg(mbi, MSIC_BATT_CHR_SPCHARGER_ADDR,
+ CHR_SPCHRGER_LOWCHR_ENABLE, is_lowchrg_enbl);
+
+ /* enable charging here */
+ ret = msic_batt_do_charging(mbi, &charge_param, is_maint_chrg);
+ if (ret) {
+ dev_warn(msic_dev, "msic_batt_do_charging failed\n");
+ goto lbl_sched_work;
+ }
+ /* Start cycle counting */
+ calculate_charge_cycles(mbi, true);
+ is_chrg_enbl = true;
+ power_supply_changed(&mbi->usb);
+
+lbl_sched_work:
+ /* Schedule teh work after 30 Seconds */
+ schedule_delayed_work(&mbi->connect_handler, TEMP_CHARGE_DELAY_JIFFIES);
+}
+
+static void msic_batt_disconn(struct work_struct *work)
+{
+ int ret;
+ struct msic_power_module_info *mbi = container_of(work,
+ struct msic_power_module_info, disconn_handler.work);
+
+ ret = msic_batt_stop_charging(mbi);
+ if (ret) {
+ dev_dbg(msic_dev, "%s: failed\n", __func__);
+ return;
+ }
+ msic_update_disconn_status(mbi);
+ power_supply_changed(&mbi->batt);
+}
+
+/**
+ * msic_charger_callback - Callback function for USB OTG
+ * @arg: device info structure
+ * @event: USB event
+ * @cap: charging capabilities
+ * Context: Interrupt Context can not sleep
+ *
+ * Will be called from the OTG driver.Depending on the event
+ * schedules a bottem half to enbale or disable the charging.
+ */
+static int msic_charger_callback(void *arg, int event, struct otg_bc_cap *cap)
+{
+ struct msic_power_module_info *mbi =
+ (struct msic_power_module_info *)arg;
+
+ /* msic callback can be called from interrupt
+ * context, So used spin lock read or modify the
+ * msic event related variables and scheduling
+ * connection or disconnection delayed works depending
+ * on the USB event.
+ */
+ spin_lock(&mbi->event_lock);
+ if (mbi->batt_event == event && event != USBCHRG_EVENT_UPDATE) {
+ spin_unlock(&mbi->event_lock);
+ return 0;
+ }
+ mbi->batt_event = event;
+ spin_unlock(&mbi->event_lock);
+
+ switch (event) {
+ case USBCHRG_EVENT_CONNECT:
+ case USBCHRG_EVENT_RESUME:
+ case USBCHRG_EVENT_UPDATE:
+ /*
+ * If previous event CONNECT and current is event is
+ * UPDATE, we have already queued the work.
+ * Its better to dequeue the previous work
+ * and add the new work to the queue.
+ */
+ cancel_delayed_work(&mbi->connect_handler);
+
+ if (pm_runtime_suspended(&mbi->pdev->dev))
+ pm_runtime_get_sync(&mbi->pdev->dev);
+ /* minimum charge current is 550 mA */
+ mbi->ch_params.vinilmt = cap->mA;
+ mbi->ch_params.chrg_type = cap->chrg_type;
+ dev_dbg(msic_dev, "CHRG TYPE:%d %d\n",
+ cap->chrg_type, cap->mA);
+ spin_lock(&mbi->event_lock);
+ mbi->refresh_charger = 1;
+ if (mbi->charging_mode == BATT_CHARGING_MODE_NONE)
+ mbi->charging_mode = BATT_CHARGING_MODE_NORMAL;
+ spin_unlock(&mbi->event_lock);
+
+ schedule_delayed_work(&mbi->connect_handler, 0);
+ break;
+ case USBCHRG_EVENT_DISCONN:
+ case USBCHRG_EVENT_SUSPEND:
+ dev_dbg(msic_dev, "USB DISCONN or SUSPEND\n");
+ cancel_delayed_work(&mbi->connect_handler);
+ schedule_delayed_work(&mbi->disconn_handler, 0);
+
+ spin_lock(&mbi->event_lock);
+ mbi->refresh_charger = 0;
+ mbi->charging_mode = BATT_CHARGING_MODE_NONE;
+ spin_unlock(&mbi->event_lock);
+ if (!pm_runtime_suspended(&mbi->pdev->dev))
+ pm_runtime_put_sync(&mbi->pdev->dev);
+ break;
+ default:
+ dev_warn(msic_dev, "Invalid OTG Event:%s\n", __func__);
+ }
+ return 0;
+}
+
+/**
+ * msic_status_monitor - worker function to monitor status
+ * @work: delayed work handler structure
+ * Context: Can sleep
+ *
+ * Will be called from the threaded IRQ function.
+ * Monitors status of the charge register and temperature.
+ */
+static void msic_status_monitor(struct work_struct *work)
+{
+ uint8_t data;
+ int retval, val, volt, temp, chr_mode, chr_event;
+ struct msic_power_module_info *mbi = container_of(work,
+ struct msic_power_module_info, chr_status_monitor.work);
+
+ retval = intel_scu_ipc_ioread8(CHR_STATUS_FLULT_REG, &data);
+ if (retval) {
+ dev_warn(msic_dev, "%s:ipc read failed\n", __func__);
+ return ;
+ }
+
+ /* Check Fluts bits in Status Register */
+ val = (data & CHR_STATUS_BIT_MASK) >> 4;
+ if (val == CHR_STATUS_BIT_FAULT) {
+ dev_dbg(msic_dev, "chr status regisrer:%x\n", data);
+ schedule_delayed_work(&mbi->chr_status_monitor,
+ CHARGE_STATUS_DELAY_JIFFIES);
+ return ;
+ }
+
+ /* Compute Charger health */
+ mutex_lock(&mbi->usb_chrg_lock);
+ if (mbi->usb_chrg_props.charger_health != POWER_SUPPLY_HEALTH_GOOD)
+ mbi->usb_chrg_props.charger_health = POWER_SUPPLY_HEALTH_GOOD;
+ mutex_unlock(&mbi->usb_chrg_lock);
+
+ spin_lock(&mbi->event_lock);
+ chr_mode = mbi->charging_mode;
+ chr_event = mbi->batt_event;
+ spin_unlock(&mbi->event_lock);
+
+ /* Compute Battery health */
+ mutex_lock(&mbi->batt_lock);
+ if (mbi->batt_props.health == POWER_SUPPLY_HEALTH_OVERHEAT) {
+ temp = mdf_read_adc_regs(MSIC_ADC_TEMP_IDX, mbi);
+ dev_dbg(msic_dev, "temp in millC :%d\n", temp);
+ /*
+ * Valid temperature window is 0 to 60 Degrees
+ * and thermister has 2 drgee hysteris and considering
+ * 2 degree adc error, fault revert temperature will
+ * be 4 to 56 degrees. These vaules will be fine tuned later.
+ */
+ if (temp >= (MSIC_BATT_TEMP_MAX - MSIC_TEMP_HYST_ERR) ||
+ temp <= (MSIC_BATT_TEMP_MIN + MSIC_TEMP_HYST_ERR)) {
+ schedule_delayed_work(&mbi->chr_status_monitor,
+ CHARGE_STATUS_DELAY_JIFFIES);
+ mutex_unlock(&mbi->batt_lock);
+ return ;
+ }
+ }
+
+ if (chr_mode == BATT_CHARGING_MODE_MAINTAINENCE)
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_FULL;
+ else if (chr_mode == BATT_CHARGING_MODE_NORMAL)
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_CHARGING;
+ else if (chr_event == USBCHRG_EVENT_SUSPEND)
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ else
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_DISCHARGING;
+
+ if (mbi->batt_props.health == POWER_SUPPLY_HEALTH_DEAD) {
+ volt = mdf_read_adc_regs(MSIC_ADC_VOL_IDX, mbi);
+ dev_dbg(msic_dev, "low vol in mV :%d\n", volt);
+ if (volt < BATT_LOWBATT_CUTOFF_VOLT) {
+ schedule_delayed_work(&mbi->chr_status_monitor,
+ CHARGE_STATUS_DELAY_JIFFIES);
+ mutex_unlock(&mbi->batt_lock);
+ return ;
+ }
+ }
+ mbi->batt_props.health = POWER_SUPPLY_HEALTH_GOOD;
+ mutex_unlock(&mbi->batt_lock);
+}
+/**
+ * msic_battery_interrupt_handler - msic battery interrupt handler
+ * Context: interrupt context
+ *
+ * MSIC battery interrupt handler which will be called on insertion
+ * of valid power source to charge the battery or an exception
+ * condition occurs.
+ */
+static irqreturn_t msic_battery_interrupt_handler(int id, void *dev)
+{
+ struct msic_power_module_info *mbi = dev;
+ u32 reg_int_val;
+
+ /* We have only one concurrent fifo reader
+ * and only one concurrent writer, so we are not
+ * using any lock to protect fifo.
+ */
+ if (unlikely(kfifo_is_full(&irq_fifo))) {
+ dev_warn(&mbi->pdev->dev, "KFIFO Full\n");
+ return IRQ_WAKE_THREAD;
+ }
+ /* Copy Interrupt registers locally */
+ reg_int_val = readl(mbi->msic_regs_iomap);
+ /* Add the Interrupt regs to FIFO */
+ kfifo_in(&irq_fifo, &reg_int_val, sizeof(u32));
+
+ return IRQ_WAKE_THREAD;
+}
+
+/**
+ * msic_battery_thread_handler - msic battery threaded IRQ function
+ * Context: can sleep
+ *
+ * MSIC 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 irqreturn_t msic_battery_thread_handler(int id, void *dev)
+{
+ int ret;
+ unsigned char data[2];
+ struct msic_power_module_info *mbi = dev;
+ u32 tmp;
+
+ /* We have only one concurrent fifo reader
+ * and only one concurrent writer, we are not
+ * using any lock to protect fifo.
+ */
+ if (unlikely(kfifo_is_empty(&irq_fifo))) {
+ dev_warn(msic_dev, "KFIFO Empty\n");
+ return IRQ_NONE;
+ }
+ /* Get the Interrupt regs sate from FIFO */
+ ret = kfifo_out(&irq_fifo, &tmp, sizeof(u32));
+ if (ret != sizeof(u32)) {
+ dev_warn(msic_dev, "KFIFO underflow\n");
+ return IRQ_NONE;
+ }
+ /* CHRINT Register */
+ data[0] = (tmp & 0x00ff0000) >> 16;
+ /* CHRINT1 Register */
+ data[1] = (tmp & 0xff000000) >> 24;
+
+ dev_dbg(msic_dev, "PWRSRC Int %x %x\n", tmp & 0xff,
+ (tmp & 0xff00) >> 8);
+ dev_dbg(msic_dev, "CHR Int %x %x\n", data[0], data[1]);
+
+ /* Check if charge complete */
+ if (data[1] & MSIC_BATT_CHR_CHRCMPLT_MASK)
+ dev_dbg(msic_dev, "CHRG COMPLT\n");
+
+ /* Check if an exception occured */
+ if (data[0] || (data[1] & ~(MSIC_BATT_CHR_CHRCMPLT_MASK))) {
+ msic_handle_exception(mbi, data[0], data[1]);
+ schedule_delayed_work(&mbi->chr_status_monitor,
+ CHARGE_STATUS_DELAY_JIFFIES);
+ }
+
+ return IRQ_HANDLED;
+
+}
+
+static int check_charger_conn(struct msic_power_module_info *mbi)
+{
+ int retval;
+ struct otg_bc_cap cap;
+ unsigned char data;
+
+ retval = intel_scu_ipc_ioread8(MSIC_BATT_CHR_SPWRSRCINT_ADDR, &data);
+ if (retval) {
+ dev_warn(msic_dev, "%s:ipc msic read failed\n", __func__);
+ return retval;
+ }
+
+ if (data & MSIC_BATT_CHR_USBDET_MASK) {
+ retval = penwell_otg_query_charging_cap(&cap);
+ if (retval) {
+ dev_warn(msic_dev, "%s(): usb otg power query "
+ "failed with error code %d\n", __func__, retval);
+ return retval;
+ }
+ /* Enable charging only if vinilmt is >= 100mA */
+ if (cap.mA >= 100)
+ msic_charger_callback(mbi, USBCHRG_EVENT_CONNECT, &cap);
+ }
+
+ return retval;
+}
+
+/**
+ * sfi_table_populate - Simple Firmware Interface table Populate
+ * @sfi_table: Simple Firmware Interface table structure
+ *
+ * SFI table has entries for the temperature limits
+ * which is populated in a local structure
+ */
+void sfi_table_populate(struct msic_batt_sfi_prop *sfi_table)
+{
+
+ /* This is temporary code, will be removed
+ * or modified as soon as the firmware supports
+ * SFI entries for MSIC battery.
+ */
+ memcpy(sfi_table->sign, "BATT", sizeof("BATT"));
+ sfi_table->length = 183;
+ sfi_table->revision = 1;
+ sfi_table->checksum = 15;
+ memcpy(sfi_table->oem_id, "INTEL", sizeof("INTEL"));
+ memcpy(sfi_table->oem_tid, "OEMTID", sizeof("OEMTID"));
+ memcpy(sfi_table->batt_id.manufac, "NK", sizeof("NK"));
+ memcpy(sfi_table->batt_id.model, "BP4L", sizeof("BP4L"));
+ memcpy(sfi_table->batt_id.sub_ver, "00", sizeof("00"));
+ sfi_table->voltage_max = 4200;
+ sfi_table->capacity = 1500;
+ sfi_table->battery_type = 2; /* POWER_SUPPLY_TECHNOLOGY_LION */
+ sfi_table->safe_temp_low_lim = 0;
+ sfi_table->safe_temp_up_lim = 60;
+ sfi_table->safe_vol_low_lim = 3700;
+ sfi_table->safe_vol_up_lim = 4200;
+ sfi_table->chrg_cur_lim = 1000;
+ sfi_table->chrg_term_lim = 1;
+ sfi_table->term_cur = 50;
+ sfi_table->temp_mon_ranges = 4;
+
+ sfi_table->temp_mon_range[0].range_number = 0;
+ sfi_table->temp_mon_range[0].temp_low_lim = 45;
+ sfi_table->temp_mon_range[0].temp_up_lim = 60;
+ sfi_table->temp_mon_range[0].full_chrg_cur = 950;
+ sfi_table->temp_mon_range[0].full_chrg_vol = 4100;
+ sfi_table->temp_mon_range[0].maint_chrg_cur = 950;
+ sfi_table->temp_mon_range[0].maint_chrg_vol_ll = 4000;
+ sfi_table->temp_mon_range[0].maint_chrg_vol_ul = 4050;
+ sfi_table->temp_mon_range[1].range_number = 1;
+ sfi_table->temp_mon_range[1].temp_low_lim = 10;
+ sfi_table->temp_mon_range[1].temp_up_lim = 45;
+ sfi_table->temp_mon_range[1].full_chrg_cur = 950;
+ sfi_table->temp_mon_range[1].full_chrg_vol = 4200;
+ sfi_table->temp_mon_range[1].maint_chrg_cur = 950;
+ sfi_table->temp_mon_range[1].maint_chrg_vol_ll = 4100;
+ sfi_table->temp_mon_range[1].maint_chrg_vol_ul = 4150;
+ sfi_table->temp_mon_range[2].range_number = 2;
+ sfi_table->temp_mon_range[2].temp_low_lim = 0;
+ sfi_table->temp_mon_range[2].temp_up_lim = 10;
+ sfi_table->temp_mon_range[2].full_chrg_cur = 950;
+ sfi_table->temp_mon_range[2].full_chrg_vol = 4100;
+ sfi_table->temp_mon_range[2].maint_chrg_cur = 950;
+ sfi_table->temp_mon_range[2].maint_chrg_vol_ll = 4000;
+ sfi_table->temp_mon_range[2].maint_chrg_vol_ul = 4050;
+ sfi_table->temp_mon_range[3].range_number = 3;
+ sfi_table->temp_mon_range[3].temp_low_lim = -10;
+ sfi_table->temp_mon_range[3].temp_up_lim = 0;
+ sfi_table->temp_mon_range[3].full_chrg_cur = 950;
+ sfi_table->temp_mon_range[3].full_chrg_vol = 3900;
+ sfi_table->temp_mon_range[3].maint_chrg_cur = 950;
+ sfi_table->temp_mon_range[3].maint_chrg_vol_ll = 3950;
+ sfi_table->temp_mon_range[3].maint_chrg_vol_ul = 3950;
+
+ sfi_table->sram_addr = 0xFFFF7FC3;
+}
+
+/**
+ * init_batt_props - initialize battery properties
+ * @mbi: msic module device structure
+ * Context: can sleep
+ *
+ * init_batt_props function initializes the
+ * MSIC battery properties.
+ */
+static void init_batt_props(struct msic_power_module_info *mbi)
+{
+ unsigned char data;
+ int retval;
+
+ mbi->batt_event = USBCHRG_EVENT_DISCONN;
+ mbi->charging_mode = BATT_CHARGING_MODE_NONE;
+
+ mbi->batt_props.status = POWER_SUPPLY_STATUS_DISCHARGING;
+ mbi->batt_props.health = POWER_SUPPLY_HEALTH_GOOD;
+ mbi->batt_props.present = MSIC_BATT_NOT_PRESENT;
+ mbi->batt_props.technology = sfi_table->battery_type;
+ mbi->batt_props.vol_max_des = sfi_table->voltage_max;
+ mbi->batt_props.vol_now = 0x0;
+ mbi->batt_props.cur_now = 0x0;
+ mbi->batt_props.charge_full = CHARGE_FULL_IN_MAH;
+ mbi->batt_props.charge_now = 0x0;
+ mbi->batt_props.charge_ctr = 0x0;
+ mbi->batt_props.charge_avg = 0x0;
+ mbi->batt_props.capacity = 0x0;
+ mbi->batt_props.capacity_level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+ mbi->batt_props.temperature = 0x0;
+
+ mbi->batt_props.energy_now = 0x0;
+ mbi->batt_props.energy_full = (mbi->batt_props.vol_max_des *
+ mbi->batt_props.charge_full) / 1000;
+
+ memcpy(mbi->batt_props.vender, sfi_table->batt_id.manufac,
+ sizeof(sfi_table->batt_id.manufac));
+ memcpy(mbi->batt_props.model, sfi_table->batt_id.model,
+ sizeof(sfi_table->batt_id.model));
+
+ /* read specific to determine the status */
+ retval = intel_scu_ipc_ioread8(MSIC_BATT_CHR_SPWRSRCINT_ADDR, &data);
+ if (retval)
+ dev_warn(&mbi->pdev->dev, "%s:ipc read failed\n", __func__);
+
+ /* determine battery Presence */
+ if (data & MSIC_BATT_CHR_BATTDET_MASK)
+ mbi->batt_props.present = MSIC_BATT_PRESENT;
+ else
+ mbi->batt_props.present = MSIC_BATT_NOT_PRESENT;
+
+ /* Enable Status Register */
+ retval = intel_scu_ipc_iowrite8(CHR_STATUS_FLULT_REG,
+ CHR_STATUS_TMR_RST | CHR_STATUS_STAT_ENBL);
+ if (retval)
+ dev_warn(&mbi->pdev->dev, "%s:ipc r/w failed\n", __func__);
+
+}
+
+/**
+ * init_charger_props - initialize charger properties
+ * @mbi: msic module device structure
+ * Context: can sleep
+ *
+ * init_charger_props function initializes the
+ * MSIC usb charger properties.
+ */
+static void init_charger_props(struct msic_power_module_info *mbi)
+{
+ mbi->usb_chrg_props.charger_type = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+ mbi->usb_chrg_props.charger_present = MSIC_USB_CHARGER_NOT_PRESENT;
+ mbi->usb_chrg_props.charger_health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ memcpy(mbi->usb_chrg_props.charger_model, "Unknown", sizeof("Unknown"));
+ memcpy(mbi->usb_chrg_props.charger_vender, "Unknown",
+ sizeof("Unknown"));
+}
+
+/**
+ * init_msic_regs - initialize msic registers
+ * @mbi: msic module device structure
+ * Context: can sleep
+ *
+ * init_msic_regs function initializes the
+ * MSIC registers like CV,Power Source LMT,etc..
+ */
+static int init_msic_regs(struct msic_power_module_info *mbi)
+{
+ static const u16 address[] = {
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_PWRSRCLMT_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRCVOLTAGE_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRTTIME_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_SPCHARGER_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRSTWDT_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRCTRL_ADDR,
+ MSIC_BATT_CHR_WDTWRITE_ADDR, MSIC_BATT_CHR_CHRCTRL1_ADDR
+ };
+ static u8 data[] = {
+ WDTWRITE_UNLOCK_VALUE, CHR_PWRSRCLMT_SET_RANGE,
+ WDTWRITE_UNLOCK_VALUE,
+ CONV_VOL_DEC_MSICREG(CHR_CHRVOLTAGE_SET_DEF),
+ WDTWRITE_UNLOCK_VALUE, CHR_CHRTIME_SET_13HRS,
+ WDTWRITE_UNLOCK_VALUE,
+ (~CHR_SPCHRGER_LOWCHR_ENABLE & CHR_SPCHRGER_WEAKVIN),
+ WDTWRITE_UNLOCK_VALUE, CHR_WDT_DISABLE,
+ WDTWRITE_UNLOCK_VALUE, CHRCNTL_CHRG_DISABLE,
+ WDTWRITE_UNLOCK_VALUE, MSIC_EMRG_CHRG_ENBL | MSIC_EMRG_CHRG_TEMP
+
+ };
+
+ return msic_write_multi(mbi, address, data, 14);
+}
+
+
+/**
+ * msic_battery_probe - msic battery initialize
+ * @pdev: msic battery platform device structure
+ * Context: can sleep
+ *
+ * MSIC battery initializes its internal data strucrue and other
+ * infrastructure components for it to work as expected.
+ */
+static int msic_battery_probe(struct platform_device *pdev)
+{
+ int retval;
+ struct msic_power_module_info *mbi = NULL;
+
+ mbi = kzalloc(sizeof(struct msic_power_module_info), GFP_KERNEL);
+ if (!mbi) {
+ dev_err(&pdev->dev, "%s(): memory allocation failed\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ sfi_table = kzalloc(sizeof(struct msic_batt_sfi_prop), GFP_KERNEL);
+ if (!sfi_table) {
+ dev_err(&pdev->dev, "%s(): memory allocation failed\n",
+ __func__);
+ kfree(mbi);
+ return -ENOMEM;
+ }
+
+ mbi->pdev = pdev;
+ mbi->irq = platform_get_irq(pdev, 0);
+ platform_set_drvdata(pdev, mbi);
+ msic_dev = &pdev->dev;
+
+ /* initialize all required framework before enabling interrupts */
+
+ /* OTG Disconnect is being called from IRQ context
+ * so calling ipc function is not approprite from otg callback
+ */
+ INIT_DELAYED_WORK(&mbi->disconn_handler, msic_batt_disconn);
+ INIT_DELAYED_WORK(&mbi->connect_handler, msic_batt_temp_charging);
+ INIT_DELAYED_WORK(&mbi->chr_status_monitor, msic_status_monitor);
+
+
+ /* Initialize the spin locks */
+ spin_lock_init(&mbi->event_lock);
+
+ /* Initialize mutex locks */
+ mutex_init(&mbi->usb_chrg_lock);
+ mutex_init(&mbi->batt_lock);
+ mutex_init(&mbi->ipc_rw_lock);
+
+ /* Populate data from SFI Table */
+ sfi_table_populate(sfi_table);
+
+ /* Initialize battery and charger Properties*/
+ init_batt_props(mbi);
+ init_charger_props(mbi);
+
+ /* Re Map Phy address space for MSIC regs */
+ mbi->msic_regs_iomap = ioremap_nocache(sfi_table->sram_addr, 8);
+ if (!mbi->msic_regs_iomap) {
+ dev_err(&pdev->dev, "battery: ioremap Failed\n");
+ retval = -ENOMEM;
+ goto ioremap_failed;
+ }
+
+ /* Init MSIC Registers */
+ retval = init_msic_regs(mbi);
+ if (retval < 0)
+ goto init_failed;
+
+ /* Initialize ADC Channels */
+ mbi->adc_index = mdf_initialize_adc(mbi);
+
+ /* register msic-batt with power supply subsystem */
+ mbi->batt.name = "msic-battery";
+ mbi->batt.type = POWER_SUPPLY_TYPE_BATTERY;
+ mbi->batt.properties = msic_battery_props;
+ mbi->batt.num_properties = ARRAY_SIZE(msic_battery_props);
+ mbi->batt.get_property = msic_battery_get_property;
+ retval = power_supply_register(&pdev->dev, &mbi->batt);
+ if (retval) {
+ dev_err(&pdev->dev, "%s(): failed to register msic battery "
+ "device with power supply subsystem\n",
+ __func__);
+ goto power_reg_failed_batt;
+ }
+
+ /* register msic-usb with power supply subsystem */
+ mbi->usb.name = "msic-charger";
+ mbi->usb.type = POWER_SUPPLY_TYPE_USB;
+ mbi->usb.properties = msic_usb_props;
+ mbi->usb.num_properties = ARRAY_SIZE(msic_usb_props);
+ mbi->usb.get_property = msic_usb_get_property;
+ retval = power_supply_register(&pdev->dev, &mbi->usb);
+ if (retval) {
+ dev_err(&pdev->dev, "%s(): failed to register msic usb "
+ "device with power supply subsystem\n",
+ __func__);
+ goto power_reg_failed_usb;
+ }
+
+ retval = device_create_file(&pdev->dev, &dev_attr_emrg_charge_enable);
+ if (retval)
+ goto sysfs_create_faied;
+
+ /* Register with OTG */
+ otg_handle = penwell_otg_register_bc_callback(msic_charger_callback,
+ (void *)mbi);
+ if (!otg_handle) {
+ dev_err(&pdev->dev, "battery: OTG Registration failed\n");
+ retval = -EBUSY;
+ goto otg_failed;
+ }
+
+ /* Init Runtime PM State */
+ pm_runtime_set_active(&mbi->pdev->dev);
+ pm_runtime_enable(&mbi->pdev->dev);
+ pm_schedule_suspend(&mbi->pdev->dev, MSEC_PER_SEC);
+
+ /* Check if already exist a Charger connection */
+ retval = check_charger_conn(mbi);
+ if (retval)
+ goto ipc_read_failed;
+
+ /* register interrupt */
+ retval = request_threaded_irq(mbi->irq, msic_battery_interrupt_handler,
+ msic_battery_thread_handler,
+ 0, DRIVER_NAME, mbi);
+ if (retval) {
+ dev_err(&pdev->dev, "%s(): cannot get IRQ\n", __func__);
+ goto requestirq_failed;
+ }
+
+
+ return retval;
+
+requestirq_failed:
+ penwell_otg_unregister_bc_callback(otg_handle);
+ipc_read_failed:
+otg_failed:
+ device_remove_file(&pdev->dev, &dev_attr_emrg_charge_enable);
+sysfs_create_faied:
+ power_supply_unregister(&mbi->usb);
+power_reg_failed_usb:
+ power_supply_unregister(&mbi->batt);
+power_reg_failed_batt:
+init_failed:
+ iounmap(mbi->msic_regs_iomap);
+ioremap_failed:
+ kfree(sfi_table);
+ kfree(mbi);
+
+ return retval;
+}
+
+static void do_exit_ops(struct msic_power_module_info *mbi)
+{
+ /* disable MSIC Charger */
+ mutex_lock(&mbi->batt_lock);
+ if (mbi->batt_props.status != POWER_SUPPLY_STATUS_DISCHARGING)
+ msic_batt_stop_charging(mbi);
+ mutex_unlock(&mbi->batt_lock);
+
+ /* Check charge Cycles */
+ if (chr_clmb_ctr >= (CHARGE_FULL_IN_MAH / 2))
+ charge_cycle_ctr++;
+}
+
+/**
+ * msic_battery_remove - msic battery finalize
+ * @pdev: msic battery platform device structure
+ * Context: can sleep
+ *
+ * MSIC battery finalizes its internal data structure and other
+ * infrastructure components that it initialized in
+ * msic_battery_probe.
+ */
+static int msic_battery_remove(struct platform_device *pdev)
+{
+ struct msic_power_module_info *mbi = platform_get_drvdata(pdev);
+
+ if (mbi) {
+ penwell_otg_unregister_bc_callback(otg_handle);
+ flush_scheduled_work();
+ free_adc_channels(mbi->adc_index, mbi);
+ free_irq(mbi->irq, mbi);
+ do_exit_ops(mbi);
+ if (mbi->msic_regs_iomap != NULL)
+ iounmap(mbi->msic_regs_iomap);
+ device_remove_file(&pdev->dev, &dev_attr_emrg_charge_enable);
+ power_supply_unregister(&mbi->usb);
+ power_supply_unregister(&mbi->batt);
+
+ kfree(sfi_table);
+ kfree(mbi);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int msic_battery_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct msic_power_module_info *mbi = platform_get_drvdata(pdev);
+ int event;
+
+ spin_lock(&mbi->event_lock);
+ event = mbi->batt_event;
+ spin_unlock(&mbi->event_lock);
+
+ if (event == USBCHRG_EVENT_CONNECT ||
+ event == USBCHRG_EVENT_UPDATE ||
+ event == USBCHRG_EVENT_RESUME) {
+
+ msic_charger_callback(mbi, USBCHRG_EVENT_SUSPEND, NULL);
+
+ dev_dbg(&mbi->pdev->dev, "Forced suspend\n");
+ }
+
+ return 0;
+}
+
+static int msic_battery_resume(struct platform_device *pdev)
+{
+ int retval = 0;
+ struct msic_power_module_info *mbi = platform_get_drvdata(pdev);
+ int event;
+
+ spin_lock(&mbi->event_lock);
+ event = mbi->batt_event;
+ spin_unlock(&mbi->event_lock);
+
+ if (event == USBCHRG_EVENT_SUSPEND ||
+ event == USBCHRG_EVENT_DISCONN) {
+ /* Check if already exist a Charger connection */
+ retval = check_charger_conn(mbi);
+ if (retval)
+ dev_warn(msic_dev, "check_charger_conn failed\n");
+ }
+
+ return retval;
+}
+#else
+#define msic_battery_suspend NULL
+#define msic_battery_resume NULL
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int msic_runtime_suspend(struct device *dev)
+{
+
+ /* ToDo: Check for MSIC Power rails */
+ dev_dbg(dev, "%s called\n", __func__);
+ return 0;
+}
+
+static int msic_runtime_resume(struct device *dev)
+{
+ /* ToDo: Check for MSIC Power rails */
+ dev_dbg(dev, "%s called\n", __func__);
+ return 0;
+}
+
+static int msic_runtime_idle(struct device *dev)
+{
+ struct platform_device *pdev = container_of(dev,
+ struct platform_device, dev);
+ struct msic_power_module_info *mbi = platform_get_drvdata(pdev);
+ int event;
+
+ dev_dbg(dev, "%s called\n", __func__);
+
+ spin_lock(&mbi->event_lock);
+ event = mbi->batt_event;
+ spin_unlock(&mbi->event_lock);
+
+ if (event == USBCHRG_EVENT_CONNECT ||
+ event == USBCHRG_EVENT_UPDATE ||
+ event == USBCHRG_EVENT_RESUME) {
+
+ dev_warn(&mbi->pdev->dev, "%s: device busy\n", __func__);
+
+ return -EBUSY;
+ }
+
+ return 0;
+}
+#else
+#define msic_runtime_suspend NULL
+#define msic_runtime_resume NULL
+#define msic_runtime_idle NULL
+#endif
+/*********************************************************************
+ * Driver initialisation and finalization
+ *********************************************************************/
+
+static const struct platform_device_id battery_id_table[] = {
+ { "msic_battery", 1 },
+};
+
+static const struct dev_pm_ops msic_batt_pm_ops = {
+ .runtime_suspend = msic_runtime_suspend,
+ .runtime_resume = msic_runtime_resume,
+ .runtime_idle = msic_runtime_idle,
+};
+
+static struct platform_driver msic_battery_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .pm = &msic_batt_pm_ops,
+ },
+ .probe = msic_battery_probe,
+ .remove = __devexit_p(msic_battery_remove),
+ .suspend = msic_battery_suspend,
+ .resume = msic_battery_resume,
+ .id_table = battery_id_table,
+};
+static int __init msic_battery_module_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&msic_battery_driver);
+ if (ret)
+ dev_err(msic_dev, "driver_register failed");
+
+ return ret;
+}
+
+static void __exit msic_battery_module_exit(void)
+{
+ platform_driver_unregister(&msic_battery_driver);
+}
+module_init(msic_battery_module_init);
+module_exit(msic_battery_module_exit);
+
+MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@xxxxxxxxx>");
+MODULE_AUTHOR("Anantha Narayanan <anantha.narayanan@xxxxxxxxx>");
+MODULE_AUTHOR("Ananth Krishna <ananth.krishna.r@xxxxxxxxx>");
+MODULE_DESCRIPTION("Intel Medfield MSIC Battery Driver");
+MODULE_LICENSE("GPL");

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