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android_kernel_cmhtcleo/drivers/power/ds2746_battery.c

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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Copyright (c) 2010 High Tech Computer Corporation
Module Name:
ds2746_battery.c
Abstract:
This module implements the power algorithm, including below concepts:
1. Charging function control.
2. Charging full condition.
3. Recharge control.
4. Battery capacity maintainance.
5. Battery full capacity calibration.
Original Auther:
Andy.YS Wang June-01-2010
---------------------------------------------------------------------------------*/
#include <linux/module.h>
#include <linux/param.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/android_alarm.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/wakelock.h>
#include <asm/gpio.h>
#include <linux/delay.h>
#include <linux/ds2746_battery.h>
#include <linux/ds2746_battery_config.h>
#include <linux/ds2746_param.h>
/*#include <linux/ds2746_param_config.h>*/
#include <linux/wrapper_types.h>
#include <linux/smb329.h>
#include <mach/htc_battery.h>
#include <asm/mach-types.h>
#include "../../arch/arm/mach-msm/proc_comm.h"
#include <linux/i2c.h> /* for i2c_adapter, i2c_client define*/
/*#include "../w1/w1.h"*/
/*#include "../w1/slaves/w1_ds2784.h"*/
#include <linux/time.h>
#include <linux/rtc.h>
struct ds2746_device_info {
struct device *dev;
struct device *w1_dev;
struct workqueue_struct *monitor_wqueue;
struct work_struct monitor_work;
/* lock to protect the battery info */
struct mutex lock;
/* DS2784 data, valid after calling ds2784_battery_read_status() */
unsigned long update_time; /* jiffies when data read */
struct alarm alarm;
struct wake_lock work_wake_lock;
u8 slow_poll;
ktime_t last_poll;
};
static struct wake_lock vbus_wake_lock;
/*========================================================================================
HTC power algorithm helper member and functions
========================================================================================*/
static struct poweralg_type poweralg = {0};
static struct poweralg_config_type config = {0};
static struct poweralg_config_type debug_config = {0};
#define FAST_POLL (1 * 60)
#define SLOW_POLL (10 * 60)
#define PREDIC_POLL 20
#define SOURCE_NONE 0
#define SOURCE_USB 1
#define SOURCE_AC 2
#define CHARGE_OFF 0
#define CHARGE_SLOW 1
#define CHARGE_FAST 2
#define BATTERY_ID_UNKNOWN 0
#define HTC_BATTERY_DS2746_DEBUG_ENABLE 0
/* DS2746 I2C BUS*/
#define DS2746_I2C_BUS_ID 0
#define DS2746_I2C_SLAVE_ADDR 0x26
/*========================================================================================
IC dependent defines
========================================================================================*/
/* DS2746 I2C register address*/
#define DS2746_STATUS_REG 0x01
#define DS2746_AUX0_MSB 0x08
#define DS2746_AUX0_LSB 0x09
#define DS2746_AUX1_MSB 0x0A
#define DS2746_AUX1_LSB 0x0B
#define DS2746_VOLT_MSB 0x0C
#define DS2746_VOLT_LSB 0x0D
#define DS2746_CURRENT_MSB 0x0E
#define DS2746_CURRENT_LSB 0x0F
#define DS2746_ACR_MSB 0x10
#define DS2746_ACR_LSB 0x11
/* DS2746 I2C I/O*/
static struct i2c_adapter *i2c2 = NULL;
static struct i2c_client *ds2746_i2c = NULL;
static int htc_battery_initial = 0;
int ds2746_i2c_write_u8(u8 value, u8 reg)
{
int ret;
u8 buf[2];
struct i2c_msg *msg;
struct i2c_msg xfer_msg[1];
/* [MSG1] fill the register address data and fill the data Tx buffer */
msg = &xfer_msg[0];
msg->addr = ds2746_i2c->addr;
msg->len = 2;
msg->flags = 0; /* Read the register value */
msg->buf = buf;
buf[0] = reg;
buf[1] = value;
ret = i2c_transfer(ds2746_i2c->adapter, xfer_msg, 1);
if (ret <= 0){
printk(DRIVER_ZONE "[%s] fail.\n", __func__);
}
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
printk(DRIVER_ZONE "[%s] ds2746[0x%x]<-0x%x.\n", __func__, reg, value);
#endif
return ret;
}
int ds2746_i2c_read_u8(u8 *value, u8 reg)
{
int ret;
struct i2c_msg *msg;
struct i2c_msg xfer_msg[2];
/* [MSG1] fill the register address data */
msg = &xfer_msg[0];
msg->addr = ds2746_i2c->addr;
msg->len = 1;
msg->flags = 0; /* Read the register value */
msg->buf = &reg;
/* [MSG2] fill the data rx buffer */
msg = &xfer_msg[1];
msg->addr = ds2746_i2c->addr;
msg->len = 1;
msg->flags = I2C_M_RD; /* Read the register value */
msg->buf = value;
ret = i2c_transfer(ds2746_i2c->adapter, xfer_msg, 2);
if (ret <= 0){
printk(DRIVER_ZONE "[%s] fail.\n", __func__);
}
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
printk(DRIVER_ZONE "[%s] ds2746[0x%x]=0x%x.\n", __func__, reg, *value);
#endif
return ret;
}
static void ds2746_i2c_exit(void)
{
if (ds2746_i2c != NULL){
kfree(ds2746_i2c);
ds2746_i2c = NULL;
}
if (i2c2 != NULL){
i2c_put_adapter(i2c2);
i2c2 = NULL;
}
}
static int ds2746_i2c_init(void)
{
i2c2 = i2c_get_adapter(DS2746_I2C_BUS_ID);
ds2746_i2c = kzalloc(sizeof(*ds2746_i2c), GFP_KERNEL);
if (i2c2 == NULL || ds2746_i2c == NULL){
printk(DRIVER_ZONE "[%s] fail (0x%x, 0x%x).\n",
__func__,
(int) i2c2,
(int) ds2746_i2c);
ds2746_i2c_exit();
return -ENOMEM;
}
ds2746_i2c->adapter = i2c2;
ds2746_i2c->addr = DS2746_I2C_SLAVE_ADDR;
return 0;
}
/*========================================================================================
HTC supporting MFG testing member and functions
=========================================================================================*/
static BOOL b_is_charge_off_by_bounding = FALSE;
static void bounding_fullly_charged_level(int upperbd)
{
static int pingpong = 1;
int lowerbd;
int current_level;
b_is_charge_off_by_bounding = FALSE;
if (upperbd <= 0)
return; /* doesn't activated this function */
lowerbd = upperbd - 5; /* 5% range */
if (lowerbd < 0)
lowerbd = 0;
current_level = CEILING(poweralg.capacity_01p, 10);
if (pingpong == 1 && upperbd <= current_level) {
printk(DRIVER_ZONE "MFG: lowerbd=%d, upperbd=%d, current=%d, pingpong:1->0 turn off\n", lowerbd, upperbd, current_level);
b_is_charge_off_by_bounding = TRUE;
pingpong = 0;
} else if (pingpong == 0 && lowerbd < current_level) {
printk(DRIVER_ZONE "MFG: lowerbd=%d, upperbd=%d, current=%d, toward 0, turn off\n", lowerbd, upperbd, current_level);
b_is_charge_off_by_bounding = TRUE;
} else if (pingpong == 0 && current_level <= lowerbd) {
printk(DRIVER_ZONE "MFG: lowerbd=%d, upperbd=%d, current=%d, pingpong:0->1 turn on\n", lowerbd, upperbd, current_level);
pingpong = 1;
} else {
printk(DRIVER_ZONE "MFG: lowerbd=%d, upperbd=%d, current=%d, toward %d, turn on\n", lowerbd, upperbd, current_level, pingpong);
}
}
static BOOL is_charge_off_by_bounding_condition(void)
{
return b_is_charge_off_by_bounding;
}
void calibrate_id_ohm(struct battery_type *battery)
{
if (!poweralg.charging_source || !poweralg.charging_enable){
battery->id_ohm += 500; /* If device is in discharge mode, Rid=Rid_1 + 0.5Kohm*/
}
else if (poweralg.charging_source == 2 && battery->current_mA >= 400 && battery->id_ohm >= 1500){
battery->id_ohm -= 1500; /* If device is in charge mode and ISET=1 (charge current is <800mA), Rid=Rid_1 - 1.5Kohm*/
}
else if (battery->id_ohm >= 700){
battery->id_ohm -= 700; /* If device is in charge mode and ISET=0 (charge current is <400mA), Rid=Rid_1 - 0.7Kohm*/
}
}
static BOOL is_charging_avaiable(void)
{
if (poweralg.is_software_charger_timeout) return FALSE;
if (!poweralg.protect_flags.is_charging_enable_available)return FALSE;
if (!poweralg.is_cable_in) return FALSE;
if (poweralg.charge_state == CHARGE_STATE_PENDING) return FALSE;
if (poweralg.charge_state == CHARGE_STATE_FULL_PENDING) return FALSE;
if (poweralg.charge_state == CHARGE_STATE_PREDICTION) return FALSE;
if (is_charge_off_by_bounding_condition()) return FALSE;
return TRUE; /* CHARGE_STATE_UNKNOWN, SET_LED_BATTERY_CHARGING is available to be charged by default*/
}
static BOOL is_high_current_charging_avaialable(void)
{
if (!poweralg.protect_flags.is_charging_high_current_avaialble) return FALSE;
if (!poweralg.is_china_ac_in) return FALSE;
if (poweralg.charge_state == CHARGE_STATE_UNKNOWN) return FALSE;
return TRUE;
}
static void update_next_charge_state(void)
{
static UINT32 count_charging_full_condition;
static UINT32 count_charge_over_load;
int next_charge_state;
int i;
/* unknown -> prediction -> unknown -> discharge/charging/pending
charging -> full-wait-stable -> full-charging -> full-pending
full-pending -> full-charging -> charging
*(cable in group) -> discharge, charge-pending, dead
*(cable out group), full-wait-stable, charge-pending, dead -> charging*/
for (i = 0; i < 25; i++) /* maximun 25 times state transition to prevent from busy loop; ideally the transition time shall be less than 5 times.*/
{
next_charge_state = poweralg.charge_state;
/* 0. enter prediction state or not*/
if (poweralg.charge_state == CHARGE_STATE_UNKNOWN){
if (poweralg.battery.is_power_on_reset || config.debug_always_predict){
if (poweralg.protect_flags.is_battery_dead){
/* keep poweralg.charge_state unchanged, set capacity to 0% directly*/
printk(DRIVER_ZONE " dead battery, \
p=0%%\n");
poweralg.capacity_01p = 0;
battery_capacity_update(&poweralg.battery, poweralg.capacity_01p);
poweralg.fst_discharge_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_acr_mAh = poweralg.battery.charge_counter_mAh;
}
else{
/* battery replaced, recalculate capacity based on battery voltage*/
printk(DRIVER_ZONE " start predict discharge...\n");
next_charge_state = CHARGE_STATE_PREDICTION;
}
config.debug_always_predict = FALSE;
}
}
if (next_charge_state == poweralg.charge_state){
/*---------------------------------------------------------------------------------------------------*/
/* 1. cable in group*/
if (poweralg.charge_state == CHARGE_STATE_UNKNOWN ||
poweralg.charge_state == CHARGE_STATE_CHARGING ||
poweralg.charge_state == CHARGE_STATE_PENDING ||
poweralg.charge_state == CHARGE_STATE_FULL_WAIT_STABLE ||
poweralg.charge_state == CHARGE_STATE_FULL_CHARGING ||
poweralg.charge_state == CHARGE_STATE_FULL_PENDING){
if (!poweralg.is_cable_in){
next_charge_state = CHARGE_STATE_DISCHARGE;
}
else if (!poweralg.protect_flags.is_charging_enable_available){
next_charge_state = CHARGE_STATE_PENDING;
}
}
/*---------------------------------------------------------------------------------------------------*/
/* 2. cable out group*/
if (poweralg.charge_state == CHARGE_STATE_UNKNOWN ||
poweralg.charge_state == CHARGE_STATE_DISCHARGE){
if (poweralg.is_cable_in){
next_charge_state = CHARGE_STATE_CHARGING;
}
}
}
/*---------------------------------------------------------------------------------------------------*/
/* 3. state handler/transition, if the charge state is not changed due to cable/protect flags*/
if (next_charge_state == poweralg.charge_state){
switch (poweralg.charge_state){
case CHARGE_STATE_PREDICTION:
{
UINT32 end_time_ms = BAHW_MyGetMSecs();
if (end_time_ms - poweralg.state_start_time_ms >=
config.predict_timeout_sec * 1000){
printk(DRIVER_ZONE "predict done [%d->%d]\n", poweralg.state_start_time_ms,
end_time_ms);
next_charge_state = CHARGE_STATE_UNKNOWN;
}
}
break;
case CHARGE_STATE_CHARGING:
if (!poweralg.battery.is_power_on_reset){
/* -> full-charging, pending, dead*/
if (poweralg.capacity_01p > 990){
/* only ever charge-full, the capacity can be larger than 99.0%*/
next_charge_state = CHARGE_STATE_FULL_CHARGING;
}
else if (poweralg.battery.voltage_mV >= config.full_charging_mv &&
poweralg.battery.current_mA >= 0 &&
poweralg.battery.current_mA <= config.full_charging_ma){
/* meet charge full terminate condition, check again*/
next_charge_state = CHARGE_STATE_FULL_WAIT_STABLE;
}
}
if (poweralg.battery.current_mA <= 0){
/* count_charge_over_load is 5 as max*/
if (count_charge_over_load < 5)
count_charge_over_load++;
else
poweralg.is_charge_over_load = TRUE;
}
else{
count_charge_over_load = 0;
poweralg.is_charge_over_load = FALSE;
}
/* is_software_charger_timeout: only triggered when AC adapter in*/
if (config.software_charger_timeout_sec && poweralg.is_china_ac_in){
/* software charger timer is enabled; for AC charge only*/
UINT32 end_time_ms = BAHW_MyGetMSecs();
if (end_time_ms - poweralg.state_start_time_ms >=
config.software_charger_timeout_sec * 1000){
printk(DRIVER_ZONE "software charger timer timeout [%d->%d]\n",
poweralg.state_start_time_ms,
end_time_ms);
poweralg.is_software_charger_timeout = TRUE;
}
}
break;
case CHARGE_STATE_FULL_WAIT_STABLE:
{
/* -> full-charging, pending, dead*/
if (poweralg.battery.voltage_mV >= config.full_charging_mv &&
poweralg.battery.current_mA >= 0 &&
poweralg.battery.current_mA <= config.full_charging_ma){
count_charging_full_condition++;
}
else{
count_charging_full_condition = 0;
next_charge_state = CHARGE_STATE_CHARGING;
}
if (count_charging_full_condition >= 3){
poweralg.capacity_01p = 1000;
battery_capacity_update(&poweralg.battery, poweralg.capacity_01p);
next_charge_state = CHARGE_STATE_FULL_CHARGING;
}
}
break;
case CHARGE_STATE_FULL_CHARGING:
{
/* -> full-pending, charging*/
UINT32 end_time_ms = BAHW_MyGetMSecs();
if (poweralg.battery.voltage_mV < config.voltage_exit_full_mv){
if (poweralg.capacity_01p > 990)
poweralg.capacity_01p = 990;
next_charge_state = CHARGE_STATE_CHARGING;
}
else if (config.full_pending_ma != 0 &&
poweralg.battery.current_mA >= 0 &&
poweralg.battery.current_mA <= config.full_pending_ma){
printk(DRIVER_ZONE " charge-full pending(%dmA)(%d:%d)\n",
poweralg.battery.current_mA,
poweralg.state_start_time_ms,
end_time_ms);
next_charge_state = CHARGE_STATE_FULL_PENDING;
}
else if (end_time_ms - poweralg.state_start_time_ms >=
config.full_charging_timeout_sec * 1000){
printk(DRIVER_ZONE " charge-full (expect:%dsec)(%d:%d)\n",
config.full_charging_timeout_sec,
poweralg.state_start_time_ms,
end_time_ms);
next_charge_state = CHARGE_STATE_FULL_PENDING;
}
}
break;
case CHARGE_STATE_FULL_PENDING:
if ((poweralg.battery.voltage_mV >= 0 &&
poweralg.battery.voltage_mV < config.voltage_recharge_mv) ||
(poweralg.battery.RARC_01p >= 0 &&
poweralg.battery.RARC_01p <= config.capacity_recharge_p * 10)){
/* -> full-charging*/
next_charge_state = CHARGE_STATE_FULL_CHARGING;
}
break;
case CHARGE_STATE_PENDING:
case CHARGE_STATE_DISCHARGE:
{
UINT32 end_time_ms = BAHW_MyGetMSecs();
if (!poweralg.is_voltage_stable){
if (end_time_ms - poweralg.state_start_time_ms >=
config.wait_votlage_statble_sec * 1000){
printk(DRIVER_ZONE " voltage stable\n");
poweralg.is_voltage_stable = TRUE;
}
}
}
if (poweralg.is_cable_in &&
poweralg.protect_flags.is_charging_enable_available){
/* -> charging*/
next_charge_state = CHARGE_STATE_CHARGING;
}
break;
}
}
/*---------------------------------------------------------------------------------------------------*/
/* 4. state transition*/
if (next_charge_state != poweralg.charge_state){
/* state exit*/
switch (poweralg.charge_state){
case CHARGE_STATE_UNKNOWN:
poweralg.capacity_01p = poweralg.battery.RARC_01p;
if (poweralg.capacity_01p > 990)
poweralg.capacity_01p = 990;
if (poweralg.capacity_01p < 0)
poweralg.capacity_01p = 0;
poweralg.fst_discharge_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_acr_mAh = poweralg.battery.charge_counter_mAh;
break;
case CHARGE_STATE_PREDICTION:
battery_param_update(&poweralg.battery,
&poweralg.protect_flags);
poweralg.capacity_01p = poweralg.battery.KADC_01p;
if (poweralg.capacity_01p > 990)
poweralg.capacity_01p = 990;
if (poweralg.capacity_01p < 0)
poweralg.capacity_01p = 0;
battery_capacity_update(&poweralg.battery,
poweralg.capacity_01p);
poweralg.fst_discharge_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_acr_mAh = poweralg.battery.charge_counter_mAh;
break;
}
/* state init*/
poweralg.state_start_time_ms = BAHW_MyGetMSecs();
switch (next_charge_state){
case CHARGE_STATE_DISCHARGE:
case CHARGE_STATE_PENDING:
/*! star_lee 20100426 - always set ACR=FULL when discharge starts and ACR>FULL*/
if (poweralg.battery.RARC_01p > 1000)
battery_capacity_update(&poweralg.battery, 1000);
poweralg.is_need_calibrate_at_49p = TRUE;
poweralg.is_need_calibrate_at_14p = TRUE;
poweralg.fst_discharge_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_acr_mAh = poweralg.battery.charge_counter_mAh;
poweralg.is_voltage_stable = FALSE;
break;
case CHARGE_STATE_CHARGING:
poweralg.is_software_charger_timeout = FALSE; /* reset software charger timer every time when charging re-starts*/
poweralg.is_charge_over_load = FALSE;
count_charge_over_load = 0;
poweralg.battery.charge_full_real_mAh = poweralg.battery.charge_full_design_mAh;
battery_capacity_update(&poweralg.battery, poweralg.capacity_01p);
break;
case CHARGE_STATE_FULL_WAIT_STABLE:
/* set to 0 first; the cournter will be add to 1 soon in CHARGE_STATE_FULL_WAIT_STABLE state handler*/
count_charging_full_condition = 0;
break;
}
printk(DRIVER_ZONE " state change(%d->%d), full count=%d, over load count=%d [%d]\n",
poweralg.charge_state,
next_charge_state,
count_charging_full_condition,
count_charge_over_load,
poweralg.state_start_time_ms);
poweralg.charge_state = next_charge_state;
continue;
}
break;
}
}
static void __update_capacity(void)
{
INT32 next_capacity_01p;
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("ds2746_batt:__update_capacity start\n");
#endif
if (poweralg.charge_state == CHARGE_STATE_PREDICTION ||
poweralg.charge_state == CHARGE_STATE_UNKNOWN){
/*! star_lee 20100429 - return 99%~25% when in prediction mode*/
poweralg.capacity_01p = max(min(990, poweralg.battery.KADC_01p), 250);
printk(DRIVER_ZONE "fake percentage (%d) during prediction.\n",
poweralg.capacity_01p);
}
else if (poweralg.charge_state == CHARGE_STATE_FULL_CHARGING ||
poweralg.charge_state == CHARGE_STATE_FULL_PENDING){
poweralg.capacity_01p = 1000;
}
else if (!is_charging_avaiable() && poweralg.is_voltage_stable){
/* DISCHARGE ALG: capacity is based on KADC/RARC; only do this after cable in 3 minutes later*/
if (poweralg.battery.KADC_01p <= 0){
if (poweralg.capacity_01p > 0)
poweralg.capacity_01p -= 10;
if (poweralg.capacity_01p > 0){
/* capacity is still not 0 when KADC is 0; record capacity for next boot time*/
battery_capacity_update(&poweralg.battery, poweralg.capacity_01p);
}
}
else{
if ((config.enable_weight_percentage) && (poweralg.capacity_01p <150 ||
poweralg.battery.RARC_01p> poweralg.battery.KADC_01p)){
#define Padc 200
#define Pw 5
/* 500=<W_KADC<=1000*/
#define W_KADC(RARC, Percentage) Padc+(INT32)abs(RARC-Percentage)*Pw
/*! star_lee 20100426 - W_KADC must be larger or equal to 0*/
INT32 w_kadc = min(max(W_KADC(poweralg.battery.RARC_01p, poweralg.battery.KADC_01p), 0), 1000);
INT32 w_rarc = 1000 - w_kadc;
next_capacity_01p = (w_kadc * poweralg.battery.KADC_01p + w_rarc * poweralg.battery.RARC_01p)/1000;
}
else{
next_capacity_01p = poweralg.battery.RARC_01p;
}
if (next_capacity_01p > 1000)
next_capacity_01p = 1000;
if (next_capacity_01p < 0)
next_capacity_01p = 0;
if (next_capacity_01p < poweralg.capacity_01p){
poweralg.capacity_01p -= min(10, poweralg.capacity_01p-next_capacity_01p);
}
}
if (config.enable_full_calibration){
if (poweralg.is_need_calibrate_at_49p &&
poweralg.capacity_01p <= 500 &&
poweralg.fst_discharge_capacity_01p >= 600){
poweralg.battery.charge_full_real_mAh = (poweralg.fst_discharge_acr_mAh-poweralg.battery.charge_counter_mAh)*1000/
(poweralg.fst_discharge_capacity_01p-poweralg.capacity_01p);
battery_capacity_update(&poweralg.battery, poweralg.capacity_01p);
poweralg.is_need_calibrate_at_49p = FALSE;
poweralg.fst_discharge_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_acr_mAh = poweralg.battery.charge_counter_mAh;
printk(DRIVER_ZONE " 1.full calibrate: full=%d\n",
poweralg.battery.charge_full_real_mAh);
}
else if (poweralg.is_need_calibrate_at_14p &&
poweralg.capacity_01p <= 150 &&
poweralg.fst_discharge_capacity_01p >= 250){
poweralg.battery.charge_full_real_mAh = (poweralg.fst_discharge_acr_mAh-poweralg.battery.charge_counter_mAh)*1000/
(poweralg.fst_discharge_capacity_01p - poweralg.capacity_01p);
battery_capacity_update(&poweralg.battery, poweralg.capacity_01p);
poweralg.is_need_calibrate_at_14p = FALSE;
poweralg.fst_discharge_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_acr_mAh = poweralg.battery.charge_counter_mAh;
printk(DRIVER_ZONE " 2.full calibrate: full=%d\n",
poweralg.battery.charge_full_real_mAh);
}
}
}
else{
/* CHARGE ALG: capacity is always based on ACR
1. plus 1% as max when charge, if the orignal capacity is <= 99%, the result is no more than 99%
2. minus 1% as max when discharge, not less than 0%*/
next_capacity_01p = poweralg.battery.RARC_01p;
if (next_capacity_01p > 1000)
next_capacity_01p = 1000;
if (next_capacity_01p < 0)
next_capacity_01p = 0;
if (next_capacity_01p > poweralg.capacity_01p){
/* charge case*/
next_capacity_01p = poweralg.capacity_01p + min(next_capacity_01p - poweralg.capacity_01p, 10);
if (poweralg.capacity_01p > 990)
poweralg.capacity_01p = next_capacity_01p;
else
poweralg.capacity_01p = min(next_capacity_01p, 990);
}
else if (next_capacity_01p < poweralg.capacity_01p){
/* discharge case*/
poweralg.capacity_01p -= min(poweralg.capacity_01p - next_capacity_01p, 10);
if (poweralg.capacity_01p < 0)
poweralg.capacity_01p = 0;
}
}
}
/*========================================================================================
HTC power algorithm implemetation
========================================================================================*/
int get_state_check_interval_min_sec(void)
{
/*the minimal check interval of each states in seconds
reserve for change polling rate
UINT32 elapse_time_ms = BAHW_MyGetMSecs() - poweralg.state_start_time_ms;
switch (poweralg.charge_state)
{
case CHARGE_STATE_FULL_WAIT_STABLE:
//! star_lee 20100429 - takes 30 seconds(10 seconds*3 times) to confirm charge full condition
return 10;
case CHARGE_STATE_PREDICTION:
return min(config.predict_timeout_sec, max((INT32)(config.predict_timeout_sec - elapse_time_ms/1000), (INT32)1));
default:
if ( BAHW_IsChargeSourceIn() ) return config.polling_time_in_charging_sec;
else return config.polling_time_in_discharging_sec;
}
*/
return 0;
}
BOOL do_power_alg(BOOL is_event_triggered)
{
/* is_event_triggered - TRUE: handle event only, do not update capacity; FALSE; always update capacity*/
static BOOL s_bFirstEntry = TRUE;
static UINT32 s_pre_time_ms;
static INT32 s_level;
UINT32 now_time_ms = BAHW_MyGetMSecs();
/*------------------------------------------------------
1 get battery data and update charge state*/
if (!battery_param_update(&poweralg.battery, &poweralg.protect_flags)){
printk(DRIVER_ZONE "battery_param_update fail, please retry next time.\n");
return FALSE;
}
update_next_charge_state();
/*-----------------------------------------------------
2 calculate battery capacity (predict if necessary)*/
if (s_bFirstEntry || now_time_ms - s_pre_time_ms > 10000 || !is_event_triggered){
/* DO not update capacity when plug/unplug cable less than 10 seconds*/
__update_capacity();
s_bFirstEntry = FALSE;
s_pre_time_ms = now_time_ms;
}
if (config.debug_disable_shutdown){
if (poweralg.capacity_01p <= 0){
poweralg.capacity_01p = 1;
}
}
s_level = CEILING(poweralg.capacity_01p, 10);
if (CEILING(poweralg.last_capacity_01p, 10) != s_level ||
poweralg.battery.last_temp_01c != poweralg.battery.temp_01c) {
poweralg.battery.last_temp_01c = poweralg.battery.temp_01c;
poweralg.last_capacity_01p = poweralg.capacity_01p;
ds2746_blocking_notify(DS2784_LEVEL_UPDATE, &s_level);
}
bounding_fullly_charged_level(config.full_level);
/*------------------------------------------------------
3 charging function change*/
if (is_charging_avaiable()){
if (is_high_current_charging_avaialable()){
ds2746_charger_control(CHARGE_FAST);
}
else{
ds2746_charger_control(CHARGE_SLOW);
}
}
else{
ds2746_charger_control(CHARGE_OFF);
}
if (config.debug_disable_hw_timer && poweralg.is_charge_over_load){
ds2746_charger_control(CHARGE_OFF);
printk(DRIVER_ZONE "Toggle charger due to HW disable charger.\n");
}
/*------------------------------------------------------
4 debug messages and update os battery status*/
/*powerlog_to_file(&poweralg);
update_os_batt_status(&poweralg);*/
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
printk(DRIVER_ZONE "[%d] P=%d cable=%d%d flags=%d%d%d debug=%d%d%d%d fst_discharge=%d/%d [%u]\n",
poweralg.charge_state,
poweralg.capacity_01p,
poweralg.is_cable_in,
poweralg.is_china_ac_in,
poweralg.protect_flags.is_charging_enable_available,
poweralg.protect_flags.is_charging_high_current_avaialble,
poweralg.protect_flags.is_battery_dead,
config.debug_disable_shutdown,
config.debug_fake_room_temp,
config.debug_disable_hw_timer,
config.debug_always_predict,
poweralg.fst_discharge_capacity_01p,
poweralg.fst_discharge_acr_mAh,
BAHW_MyGetMSecs());
#endif
return TRUE;
}
void power_alg_init(struct poweralg_config_type *debug_config)
{
/*-------------------------------------------------------------
1. setup default poweralg data*/
poweralg.charge_state = CHARGE_STATE_UNKNOWN;
poweralg.capacity_01p = 990;
poweralg.last_capacity_01p = poweralg.capacity_01p;
poweralg.fst_discharge_capacity_01p = 0;
poweralg.fst_discharge_acr_mAh = 0;
poweralg.is_need_calibrate_at_49p = TRUE;
poweralg.is_need_calibrate_at_14p = TRUE;
poweralg.is_charge_over_load = FALSE;
poweralg.is_china_ac_in = FALSE;
poweralg.is_cable_in = FALSE;
poweralg.is_voltage_stable = FALSE;
poweralg.is_software_charger_timeout = FALSE;
poweralg.state_start_time_ms = 0;
if(get_cable_status() == SOURCE_USB)
{
poweralg.is_cable_in = TRUE;
poweralg.charging_source = SOURCE_USB;
ds2746_charger_control(CHARGE_SLOW);
}
else if (get_cable_status() == SOURCE_AC)
{
poweralg.is_cable_in = TRUE;
poweralg.is_china_ac_in = TRUE;
poweralg.charging_source = SOURCE_AC;
ds2746_charger_control(CHARGE_FAST);
} else{
poweralg.charging_source = SOURCE_NONE;
}
/*-------------------------------------------------------------
2. setup default config flags (board dependent)*/
poweralg_config_init(&config);
if (debug_config){
config.debug_disable_shutdown = debug_config->debug_disable_shutdown;
config.debug_fake_room_temp = debug_config->debug_fake_room_temp;
config.debug_disable_hw_timer = debug_config->debug_disable_hw_timer;
config.debug_always_predict = debug_config->debug_always_predict;
}
/* if ( BAHW_IsTestMode() )
{
config.debug_disable_shutdown = TRUE;
config.debug_fake_room_temp = TRUE;
config.debug_disable_hw_timer = TRUE;
}*/
/*-------------------------------------------------------------
3. setup default protect flags*/
poweralg.protect_flags.is_charging_enable_available = TRUE;
poweralg.protect_flags.is_battery_dead = FALSE;
poweralg.protect_flags.is_charging_high_current_avaialble = FALSE;
poweralg.protect_flags.is_fake_room_temp = config.debug_fake_room_temp;
/*-------------------------------------------------------------
4. setup default battery structure*/
battery_param_init(&poweralg.battery);
/*pr_info("power alg inited with board name <%s>\n", HTC_BATT_BOARD_NAME);*/
}
void power_alg_preinit(void)
{
/* make sure cable and battery is in when off mode charging*/
}
static BLOCKING_NOTIFIER_HEAD(ds2746_notifier_list);
int ds2746_register_notifier(struct notifier_block *nb)
{
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("%s\n", __func__);
#endif
return blocking_notifier_chain_register(&ds2746_notifier_list, nb);
}
int ds2746_unregister_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(&ds2746_notifier_list, nb);
}
int ds2746_blocking_notify(unsigned long val, void *v)
{
int chg_ctl;
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("%s\n", __func__);
#endif
if (val == DS2784_CHARGING_CONTROL){
chg_ctl = *(int *) v;
if (machine_is_passionc()){
pr_info("[ds2746_batt] Switch charging %d\n", chg_ctl);
if (chg_ctl <= 2){
gpio_direction_output(22, !(!!chg_ctl));/*PNC*/
set_charger_ctrl(chg_ctl);
}
return 0;
}
else if (poweralg.battery.id_index != BATTERY_ID_UNKNOWN){
/* only notify at changes */
if (poweralg.charging_enable == chg_ctl)
return 0;
else
poweralg.charging_enable = chg_ctl;
}
else{
/* poweralg.charging_enable = DISABLE;
v = DISABLE;
pr_info("[HTC_BATT] Unknow battery\n");*/
if (poweralg.charging_enable == chg_ctl)
return 0;
else
poweralg.charging_enable = chg_ctl;
}
}
return blocking_notifier_call_chain(&ds2746_notifier_list, val, v);
}
int ds2746_get_battery_info(struct battery_info_reply *batt_info)
{
batt_info->batt_id = poweralg.battery.id_index; /*Mbat ID*/
batt_info->batt_vol = poweralg.battery.voltage_mV; /*VMbat*/
batt_info->batt_temp = poweralg.battery.temp_01c; /*Temperature*/
batt_info->batt_current = poweralg.battery.current_mA; /*Current*/
batt_info->level = CEILING(poweralg.capacity_01p, 10); /*last_show%*/
batt_info->charging_source = poweralg.charging_source;
batt_info->charging_enabled = poweralg.charging_enable;
batt_info->full_bat = poweralg.battery.charge_full_real_mAh;
return 0;
}
ssize_t htc_battery_show_attr(struct device_attribute *attr, char *buf)
{
int len = 0;
pr_info("%s\n", __func__);
if (!strcmp(attr->attr.name, "batt_attr_text")){
len += scnprintf(buf +
len,
PAGE_SIZE -
len,
"Percentage(%%): %d;\n"
"KADC(%%): %d;\n"
"RARC(%%): %d;\n"
"V_MBAT(mV): %d;\n"
"Main_battery_ID(Kohm): %d;\n"
"pd_M: %d;\n"
"Current(mA): %d;\n"
"Temp: %d;\n"
"Charging_source: %d;\n"
"ACR(mAh): %d;\n"
"FULL(mAh): %d;\n"
"1st_dis_percentage(%%): %d;\n"
"1st_dis_ACR: %d;\n",
CEILING(poweralg.capacity_01p, 10),
CEILING(poweralg.battery.KADC_01p, 10),
CEILING(poweralg.battery.RARC_01p, 10),
poweralg.battery.voltage_mV,
poweralg.battery.id_ohm,
poweralg.battery.pd_m,
poweralg.battery.current_mA,
CEILING(poweralg.battery.temp_01c, 10),
poweralg.charging_source,
poweralg.battery.charge_counter_mAh,
poweralg.battery.charge_full_real_mAh,
CEILING(poweralg.fst_discharge_capacity_01p, 10),
poweralg.fst_discharge_acr_mAh
);
}
return len;
}
static int cable_status_handler_func(struct notifier_block *nfb,
unsigned long action, void *param)
{
u32 cable_type = (u32) action;
pr_info("[ds2746_batt] cable change to %d\n", cable_type);
/* When the cable plug out, reset all the related flag,
Let algorithm machine to judge latest state */
if (cable_type == 0){
poweralg.is_cable_in = 0;
poweralg.is_china_ac_in = 0;
/*htc_batt_info.rep.OTP_Flag = 0;
htc_batt_info.rep.charging_sts_flag = 0;
htc_batt_info.full_charge_count = 0;*/
}
else if (cable_type == 1){
poweralg.is_cable_in = 1;
poweralg.is_china_ac_in = 0;
}
else if (cable_type == 2){
poweralg.is_cable_in = 1;
poweralg.is_china_ac_in = 1;
}
else if (cable_type == 0xff){
if (param)
config.full_level = *(INT32 *)param;
pr_info("[ds2746_batt] Set the full level to %d\n", config.full_level);
return NOTIFY_OK;
}
else if (cable_type == 0x10){
poweralg.protect_flags.is_fake_room_temp = TRUE;
pr_info("[ds2746_batt] enable fake temp mode\n");
return NOTIFY_OK;
}
if (cable_type <= 2){
poweralg.charging_source = cable_type;
ds2746_blocking_notify(DS2784_CHARGING_CONTROL,
&poweralg.charging_source);
}
return NOTIFY_OK;
}
static struct notifier_block cable_status_handler =
{
.notifier_call = cable_status_handler_func,
};
void ds2746_charger_control(int type)
{
int chg_ctl = DISABLE;
int charge_type = type;
switch (charge_type){
case CHARGE_OFF:
/* CHARGER_EN is active low. Set to 1 to disable. */
chg_ctl = DISABLE;
ds2746_blocking_notify(DS2784_CHARGING_CONTROL, &chg_ctl);
/*if (temp >= TEMP_CRITICAL)
pr_info("batt: charging OFF [OVERTEMP]\n");
else if (htc_batt_info.rep.cooldown)
pr_info("batt: charging OFF [COOLDOWN]\n");
else if (htc_batt_info.rep.battery_full)
pr_info("batt: charging OFF [FULL]\n");
else*/
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("batt: charging OFF\n");
#endif
break;
case CHARGE_SLOW:
chg_ctl = ENABLE_SLOW_CHG;
ds2746_blocking_notify(DS2784_CHARGING_CONTROL, &chg_ctl);
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("batt: charging SLOW\n");
#endif
break;
case CHARGE_FAST:
chg_ctl = ENABLE_FAST_CHG;
ds2746_blocking_notify(DS2784_CHARGING_CONTROL, &chg_ctl);
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("batt: charging FAST\n");
#endif
break;
}
}
static void ds2746_program_alarm(struct ds2746_device_info *di, int seconds)
{
ktime_t low_interval = ktime_set(seconds - 10, 0);
ktime_t slack = ktime_set(20, 0);
ktime_t next;
next = ktime_add(di->last_poll, low_interval);
alarm_start_range(&di->alarm, next, ktime_add(next, slack));
}
static void ds2746_battery_work(struct work_struct *work)
{
if (!htc_battery_initial) return;
struct ds2746_device_info *di = container_of(work,
struct ds2746_device_info, monitor_work);
unsigned long flags;
#if HTC_BATTERY_DS2746_DEBUG_ENABLE
pr_info("[ds2746_batt] ds2746_battery_work*\n");
#endif
do_power_alg(0);
get_state_check_interval_min_sec();
di->last_poll = alarm_get_elapsed_realtime();
/* prevent suspend before starting the alarm */
local_irq_save(flags);
wake_unlock(&di->work_wake_lock);
if (poweralg.battery.is_power_on_reset)
ds2746_program_alarm(di, PREDIC_POLL);
else
ds2746_program_alarm(di, FAST_POLL);
local_irq_restore(flags);
}
static void ds2746_battery_alarm(struct alarm *alarm)
{
if (!htc_battery_initial) return;
struct ds2746_device_info *di = container_of(alarm, struct ds2746_device_info, alarm);
wake_lock(&di->work_wake_lock);
queue_work(di->monitor_wqueue, &di->monitor_work);
}
static int ds2746_battery_probe(struct platform_device *pdev)
{
int rc;
struct ds2746_device_info *di;
struct ds2746_platform_data *pdata = pdev->dev.platform_data;
pr_info("[ds2746_batt] ds2746_battery_prob\n");
poweralg.battery.thermal_id = pdata->func_get_thermal_id();
power_alg_preinit();
power_alg_init(&debug_config);
di = kzalloc(sizeof(*di), GFP_KERNEL);
if (!di){
rc = -ENOMEM;
goto fail_register;
}
di->update_time = jiffies;
platform_set_drvdata(pdev, di);
di->dev = &pdev->dev;
INIT_WORK(&di->monitor_work, ds2746_battery_work);
di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
/* init to something sane */
di->last_poll = alarm_get_elapsed_realtime();
if (!di->monitor_wqueue){
rc = -ESRCH;
goto fail_workqueue;
}
wake_lock_init(&di->work_wake_lock, WAKE_LOCK_SUSPEND, "ds2746-battery");
alarm_init(&di->alarm,
ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
ds2746_battery_alarm);
wake_lock(&di->work_wake_lock);
queue_work(di->monitor_wqueue, &di->monitor_work);
htc_battery_initial = 1;
return 0;
fail_workqueue : fail_register : kfree(di);
return rc;
}
static int ds2746_battery_remove(struct platform_device *pdev)
{
struct ds2746_device_info *di = platform_get_drvdata(pdev);
cancel_work_sync(&di->monitor_work);
destroy_workqueue(di->monitor_wqueue);
return 0;
}
/* FIXME: power down DQ master when not in use. */
static int ds2746_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct ds2746_device_info *di = platform_get_drvdata(pdev);
unsigned long flags;
pr_info("ds2746_batt:ds2746_suspend\n");
/* If we are on battery, reduce our update rate until
* we next resume.*/
if (poweralg.charging_source == SOURCE_NONE){
local_irq_save(flags);
ds2746_program_alarm(di, SLOW_POLL);
di->slow_poll = 1;
local_irq_restore(flags);
}
/*gpio_direction_output(87, 0);*/
return 0;
}
static void ds2746_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct ds2746_device_info *di = platform_get_drvdata(pdev);
unsigned long flags;
/* We might be on a slow sample cycle. If we're
* resuming we should resample the battery state
* if it's been over a minute since we last did
* so, and move back to sampling every minute until
* we suspend again.*/
/*gpio_direction_output(87, 1);*/
ndelay(100 * 1000);
pr_info("ds2746_batt:ds2746_resume\n");
if (di->slow_poll){
local_irq_save(flags);
ds2746_program_alarm(di, FAST_POLL);
di->slow_poll = 0;
local_irq_restore(flags);
}
}
static struct dev_pm_ops ds2746_pm_ops = {
.prepare = ds2746_suspend,
.complete = ds2746_resume,
};
MODULE_ALIAS("platform:ds2746-battery");
static struct platform_driver ds2746_battery_driver =
{
.driver = {
.name = "ds2746-battery",
.pm = &ds2746_pm_ops,
},
.probe = ds2746_battery_probe,
.remove = ds2746_battery_remove,
};
static int __init ds2746_battery_init(void)
{
int ret;
pr_info("[ds2746_batt]ds2746_battery_init");
wake_lock_init(&vbus_wake_lock, WAKE_LOCK_SUSPEND, "vbus_present");
register_notifier_cable_status(&cable_status_handler);
ret = ds2746_i2c_init();
if (ret < 0){
return ret;
}
/*mutex_init(&htc_batt_info.lock);*/
return platform_driver_register(&ds2746_battery_driver);
}
static void __exit ds2746_battery_exit(void)
{
ds2746_i2c_exit();
platform_driver_unregister(&ds2746_battery_driver);
}
module_init(ds2746_battery_init);
module_exit(ds2746_battery_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andy.YS Wang <Andy.ys_wang@htc.com>");
MODULE_DESCRIPTION("ds2746 battery driver");
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