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android_kernel_samsung_msm8226/drivers/battery/max77823_charger.c

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/*
* max77823_charger.c
* Samsung MAX77823 Charger Driver
*
* Copyright (C) 2012 Samsung Electronics
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define DEBUG
#include <linux/mfd/max77823.h>
#include <linux/mfd/max77823-private.h>
#ifdef CONFIG_USB_HOST_NOTIFY
#include <linux/host_notify.h>
#endif
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static enum power_supply_property max77823_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
};
static void max77823_charger_initialize(struct max77823_charger_data *charger);
static int max77823_get_vbus_state(struct max77823_charger_data *charger);
static int max77823_get_charger_state(struct max77823_charger_data *charger);
static bool max77823_charger_unlock(struct max77823_charger_data *charger)
{
struct i2c_client *i2c = charger->i2c;
u8 reg_data;
u8 chgprot;
int retry_cnt = 0;
bool need_init = false;
do {
max77823_read_reg(i2c, MAX77823_CHG_CNFG_06, &reg_data);
chgprot = ((reg_data & 0x0C) >> 2);
if (chgprot != 0x03) {
pr_err("%s: unlock err, chgprot(0x%x), retry(%d)\n",
__func__, chgprot, retry_cnt);
max77823_write_reg(i2c, MAX77823_CHG_CNFG_06,
(0x03 << 2));
need_init = true;
msleep(20);
} else {
pr_debug("%s: unlock success, chgprot(0x%x)\n",
__func__, chgprot);
break;
}
} while ((chgprot != 0x03) && (++retry_cnt < 10));
return need_init;
}
static void check_charger_unlock_state(struct max77823_charger_data *charger)
{
bool need_reg_init;
pr_debug("%s\n", __func__);
need_reg_init = max77823_charger_unlock(charger);
if (need_reg_init) {
pr_err("%s: charger locked state, reg init\n", __func__);
max77823_charger_initialize(charger);
}
}
static void max77823_test_read(struct max77823_charger_data *charger)
{
u8 data = 0;
u32 addr = 0;
for (addr = 0xB0; addr <= 0xC3; addr++) {
max77823_read_reg(charger->i2c, addr, &data);
pr_debug("MAX7823 addr : 0x%02x data : 0x%02x\n", addr, data);
}
}
static int max77823_get_vbus_state(struct max77823_charger_data *charger)
{
u8 reg_data;
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_00, &reg_data);
if (charger->cable_type == POWER_SUPPLY_TYPE_WIRELESS)
reg_data = ((reg_data & MAX77823_WCIN_DTLS) >>
MAX77823_WCIN_DTLS_SHIFT);
else
reg_data = ((reg_data & MAX77823_CHGIN_DTLS) >>
MAX77823_CHGIN_DTLS_SHIFT);
switch (reg_data) {
case 0x00:
pr_info("%s: VBUS is invalid. CHGIN < CHGIN_UVLO\n",
__func__);
break;
case 0x01:
pr_info("%s: VBUS is invalid. CHGIN < MBAT+CHGIN2SYS" \
"and CHGIN > CHGIN_UVLO\n", __func__);
break;
case 0x02:
pr_info("%s: VBUS is invalid. CHGIN > CHGIN_OVLO",
__func__);
break;
case 0x03:
break;
default:
break;
}
return reg_data;
}
static int max77823_get_charger_state(struct max77823_charger_data *charger)
{
int status = POWER_SUPPLY_STATUS_UNKNOWN;
u8 reg_data;
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_01, &reg_data);
pr_info("%s : charger status (0x%02x)\n", __func__, reg_data);
reg_data &= 0x0f;
switch (reg_data)
{
case 0x00:
case 0x01:
case 0x02:
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x03:
case 0x04:
status = POWER_SUPPLY_STATUS_FULL;
break;
case 0x05:
case 0x06:
case 0x07:
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case 0x08:
case 0xA:
case 0xB:
status = POWER_SUPPLY_STATUS_DISCHARGING;
default:
status = POWER_SUPPLY_STATUS_UNKNOWN;
break;
}
return (int)status;
}
static void max77823_dump_reg(struct max77823_charger_data *charger)
{
u8 reg_data;
u32 reg_addr;
pr_info("%s\n", __func__);
for (reg_addr = 0xB0; reg_addr <= 0xC3; reg_addr++) {
max77823_read_reg(charger->i2c, reg_addr, &reg_data);
pr_info("max77823: c: 0x%02x(0x%02x)\n", reg_addr, reg_data);
}
}
static int max77823_get_charging_health(struct max77823_charger_data *charger)
{
int state;
int vbus_state;
int retry_cnt;
u8 chg_dtls_00, chg_dtls, reg_data;
u8 chg_cnfg_00, chg_cnfg_01 ,chg_cnfg_02, chg_cnfg_04, chg_cnfg_09, chg_cnfg_12;
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_01, &reg_data);
reg_data = ((reg_data & MAX77823_BAT_DTLS) >> MAX77823_BAT_DTLS_SHIFT);
pr_info("%s: reg_data(0x%x)\n", __func__, reg_data);
switch (reg_data) {
case 0x00:
pr_info("%s: No battery and the charger is suspended\n",
__func__);
state = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
case 0x01:
pr_info("%s: battery is okay "
"but its voltage is low(~VPQLB)\n", __func__);
state = POWER_SUPPLY_HEALTH_GOOD;
break;
case 0x02:
pr_info("%s: battery dead\n", __func__);
state = POWER_SUPPLY_HEALTH_DEAD;
break;
case 0x03:
state = POWER_SUPPLY_HEALTH_GOOD;
break;
case 0x04:
pr_info("%s: battery is okay" \
"but its voltage is low\n", __func__);
state = POWER_SUPPLY_HEALTH_GOOD;
break;
case 0x05:
pr_info("%s: battery ovp\n", __func__);
state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
break;
default:
pr_info("%s: battery unknown : 0x%d\n", __func__, reg_data);
state = POWER_SUPPLY_HEALTH_UNKNOWN;
break;
}
if (state == POWER_SUPPLY_HEALTH_GOOD) {
union power_supply_propval value;
psy_do_property("battery", get,
POWER_SUPPLY_PROP_HEALTH, value);
/* VBUS OVP state return battery OVP state */
vbus_state = max77823_get_vbus_state(charger);
/* read CHG_DTLS and detecting battery terminal error */
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_01, &chg_dtls);
chg_dtls = ((chg_dtls & MAX77823_CHG_DTLS) >>
MAX77823_CHG_DTLS_SHIFT);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_00, &chg_cnfg_00);
/* print the log at the abnormal case */
if((charger->is_charging == 1) && (chg_dtls & 0x08)) {
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_00, &chg_dtls_00);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_01, &chg_cnfg_01);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_02, &chg_cnfg_02);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_04, &chg_cnfg_04);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_09, &chg_cnfg_09);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_12, &chg_cnfg_12);
pr_info("%s: CHG_DTLS_00(0x%x), CHG_DTLS_01(0x%x), CHG_CNFG_00(0x%x)\n",
__func__, chg_dtls_00, chg_dtls, chg_cnfg_00);
pr_info("%s: CHG_CNFG_01(0x%x), CHG_CNFG_02(0x%x), CHG_CNFG_04(0x%x)\n",
__func__, chg_cnfg_01, chg_cnfg_02, chg_cnfg_04);
pr_info("%s: CHG_CNFG_09(0x%x), CHG_CNFG_12(0x%x)\n",
__func__, chg_cnfg_09, chg_cnfg_12);
}
pr_info("%s: vbus_state : 0x%d, chg_dtls : 0x%d\n", __func__, vbus_state, chg_dtls);
/* OVP is higher priority */
if (vbus_state == 0x02) { /* CHGIN_OVLO */
pr_info("%s: vbus ovp\n", __func__);
state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
if (charger->cable_type == POWER_SUPPLY_TYPE_WIRELESS) {
retry_cnt = 0;
do {
msleep(50);
vbus_state = max77823_get_vbus_state(charger);
} while((retry_cnt++ < 2) && (vbus_state == 0x02));
if (vbus_state == 0x02) {
state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
panic("wpc and ovp");
} else
state = POWER_SUPPLY_HEALTH_GOOD;
}
} else if (((vbus_state == 0x0) || (vbus_state == 0x01)) &&(chg_dtls & 0x08) && \
(chg_cnfg_00 & MAX77823_MODE_BUCK) && \
(chg_cnfg_00 & MAX77823_MODE_CHGR) && \
(charger->cable_type != POWER_SUPPLY_TYPE_WIRELESS)) {
pr_info("%s: vbus is under\n", __func__);
state = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
}
}
max77823_dump_reg(charger);
return (int)state;
}
static u8 max77823_get_float_voltage_data(int float_voltage)
{
int voltage = 3650;
int i;
for (i = 0; voltage <= 4700; i++) {
if (float_voltage <= voltage)
break;
voltage += 25;
}
if (float_voltage <= 4340)
return i;
else
return (i+1);
}
static int max77823_get_input_current(struct max77823_charger_data *charger)
{
u8 reg_data;
int get_current, quotient, remainder;
if (charger->cable_type == POWER_SUPPLY_TYPE_WIRELESS) {
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_10, &reg_data);
if (reg_data <= 3)
get_current = 60;
else
get_current = 60 + (reg_data - 3) * 20;
} else {
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_09, &reg_data);
quotient = reg_data / 3;
remainder = reg_data % 3;
if (remainder <= 1)
get_current = 100;
else if (remainder == 0)
get_current = quotient * 100;
else if (remainder == 1)
get_current = (quotient * 100) + 33;
else if (remainder == 2)
get_current = (quotient * 100) + 67;
}
return get_current;
}
static void max77823_set_input_current(struct max77823_charger_data *charger,
int input_current)
{
int quotient, remainder;
u8 reg_data;
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_09, &reg_data);
reg_data &= ~MAX77823_CHG_CHGIN_LIM;
if (!input_current) {
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_09, reg_data);
} else {
quotient = input_current / 100;
remainder = input_current % 100;
if (remainder >= 67)
reg_data |= (quotient * 3) + 2;
else if (remainder >= 33)
reg_data |= (quotient * 3) + 1;
else if (remainder < 33)
reg_data |= quotient * 3;
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_09, reg_data);
}
pr_info("%s: reg_data(0x%02x), charging current(%d)\n",
__func__, reg_data, input_current);
}
static void max77823_set_charge_current(struct max77823_charger_data *charger,
int fast_charging_current)
{
int curr_step = 50;
u8 reg_data;
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_02, &reg_data);
reg_data &= ~MAX77823_CHG_CC;
if (!fast_charging_current) {
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_02, reg_data);
} else {
reg_data |= (fast_charging_current / curr_step);
max77823_write_reg(charger->i2c,MAX77823_CHG_CNFG_02, reg_data);
}
pr_info("%s: reg_data(0x%02x), charging current(%d)\n",
__func__, reg_data, fast_charging_current);
}
static void max77823_set_topoff_current(struct max77823_charger_data *charger,
int termination_current,
int termination_time)
{
u8 reg_data;
if (termination_current >= 350)
reg_data = 0x07;
else if (termination_current >= 300)
reg_data = 0x06;
else if (termination_current >= 250)
reg_data = 0x05;
else if (termination_current >= 200)
reg_data = 0x04;
else if (termination_current >= 175)
reg_data = 0x03;
else if (termination_current >= 150)
reg_data = 0x02;
else if (termination_current >= 125)
reg_data = 0x01;
else
reg_data = 0x00;
/* the unit of timeout is second*/
termination_time = termination_time / 60;
reg_data |= ((termination_time / 10) << 3);
pr_info("%s: reg_data(0x%02x), topoff(%d), time(%d)\n",
__func__, reg_data, termination_current,
termination_time/60);
max77823_update_reg(charger->i2c, MAX77823_CHG_CNFG_03,
reg_data,
MAX77823_CHG_TO_ITH | MAX77823_CHG_TO_TIME);
}
static void max77823_set_charger_state(struct max77823_charger_data *charger,
int enable)
{
u8 reg_data;
max77823_read_reg(charger->i2c, MAX77823_CHG_CNFG_00, &reg_data);
if (enable)
reg_data |= (0x05);
else
reg_data &= ~(0x05);
pr_debug("%s : CHG_CNFG_00(0x%02x)\n", __func__, reg_data);
max77823_write_reg(charger->i2c,MAX77823_CHG_CNFG_00, reg_data);
}
static void max77823_charger_function_control(
struct max77823_charger_data *charger)
{
const int usb_charging_current = charger->pdata->charging_current[
POWER_SUPPLY_TYPE_USB].fast_charging_current;
int set_charging_current, set_charging_current_max;
u8 chg_cnfg_00;
pr_info("####%s####\n", __func__);
if (charger->cable_type == POWER_SUPPLY_TYPE_BATTERY ||
charger->cable_type == POWER_SUPPLY_TYPE_OTG) {
charger->is_charging = false;
charger->aicl_on = false;
set_charging_current = 0;
set_charging_current_max =
charger->pdata->charging_current[
POWER_SUPPLY_TYPE_USB].input_current_limit;
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_00, &chg_cnfg_00);
chg_cnfg_00 &= ~(CHG_CNFG_00_CHG_MASK
| CHG_CNFG_00_OTG_MASK
| CHG_CNFG_00_BUCK_MASK
| CHG_CNFG_00_BOOST_MASK
| CHG_CNFG_00_DIS_MUIC_CTRL_MASK);
if (charger->cable_type == POWER_SUPPLY_TYPE_OTG) {
chg_cnfg_00 |= (CHG_CNFG_00_OTG_MASK
| CHG_CNFG_00_BOOST_MASK
| CHG_CNFG_00_DIS_MUIC_CTRL_MASK);
} else {
set_charging_current_max =
charger->pdata->charging_current[
POWER_SUPPLY_TYPE_USB].input_current_limit;
}
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_00, chg_cnfg_00);
} else {
charger->is_charging = true;
charger->charging_current_max =
charger->pdata->charging_current
[charger->cable_type].input_current_limit;
charger->charging_current =
charger->pdata->charging_current
[charger->cable_type].fast_charging_current;
/* decrease the charging current according to siop level */
set_charging_current =
charger->charging_current * charger->siop_level / 100;
if (set_charging_current > 0 &&
set_charging_current < usb_charging_current)
set_charging_current = usb_charging_current;
set_charging_current_max =
charger->charging_current_max;
if (charger->siop_level < 100 &&
set_charging_current_max > SIOP_INPUT_LIMIT_CURRENT) {
set_charging_current_max = SIOP_INPUT_LIMIT_CURRENT;
if (set_charging_current > SIOP_CHARGING_LIMIT_CURRENT)
set_charging_current = SIOP_CHARGING_LIMIT_CURRENT;
}
}
max77823_set_charger_state(charger, charger->is_charging);
/* if battery full, only disable charging */
if ((charger->status == POWER_SUPPLY_STATUS_CHARGING) ||
(charger->status == POWER_SUPPLY_STATUS_DISCHARGING)) {
/* current setting */
max77823_set_charge_current(charger,
set_charging_current);
/* if battery is removed, disable input current and reenable input current
* to enable buck always */
max77823_set_input_current(charger,
set_charging_current_max);
max77823_set_topoff_current(charger,
charger->pdata->charging_current[
charger->cable_type].full_check_current_1st,
charger->pdata->charging_current[
charger->cable_type].full_check_current_2nd);
}
pr_info("charging = %d, fc = %d, il = %d, t1 = %d, t2 = %d, cable = %d\n",
charger->is_charging,
charger->charging_current,
charger->charging_current_max,
charger->pdata->charging_current[charger->cable_type].full_check_current_1st,
charger->pdata->charging_current[charger->cable_type].full_check_current_2nd,
charger->cable_type);
max77823_test_read(charger);
}
static void max77823_charger_initialize(struct max77823_charger_data *charger)
{
u8 reg_data;
pr_info("%s\n", __func__);
/* unmasked: CHGIN_I, WCIN_I, BATP_I, BYP_I */
max77823_write_reg(charger->i2c, MAX77823_CHG_INT_MASK, 0x9a);
/* unlock charger setting protect */
reg_data = (0x03 << 2);
max77823_write_reg(charger->i2c, MAX77823_CHG_CNFG_06, reg_data);
/*
* fast charge timer disable
* restart threshold disable
* pre-qual charge enable(default)
*/
reg_data = (0x0 << 0) | (0x03 << 4);
max77823_write_reg(charger->i2c, MAX77823_CHG_CNFG_01, reg_data);
/*
* charge current 466mA(default)
* otg current limit 900mA
*/
max77823_read_reg(charger->i2c, MAX77823_CHG_CNFG_02, &reg_data);
reg_data |= (1 << 7);
max77823_write_reg(charger->i2c, MAX77823_CHG_CNFG_02, reg_data);
/*
* top off current 100mA
* top off timer 40min
*/
reg_data = (0x04 << 3);
max77823_update_reg(charger->i2c, MAX77823_CHG_CNFG_03,
reg_data,
MAX77823_CHG_TO_ITH | MAX77823_CHG_TO_TIME);
/*
* cv voltage 4.2V or 4.35V
* MINVSYS 3.6V(default)
*/
reg_data = max77823_get_float_voltage_data(charger->pdata->chg_float_voltage);
max77823_update_reg(charger->i2c, MAX77823_CHG_CNFG_04,
(reg_data << CHG_CNFG_04_CHG_CV_PRM_SHIFT),
CHG_CNFG_04_CHG_CV_PRM_MASK);
max77823_read_reg(charger->i2c, MAX77823_CHG_CNFG_04, &reg_data);
pr_info("%s: battery cv voltage 0x%x\n", __func__, reg_data);
}
static int max77823_chg_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max77823_charger_data *charger =
container_of(psy, struct max77823_charger_data, psy_chg);
u8 reg_data;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = POWER_SUPPLY_TYPE_BATTERY;
if (max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_OK, &reg_data) == 0) {
pr_info("%s: reg_data(%d)\n", __func__, reg_data);
if (reg_data & MAX77823_WCIN_OK) {
val->intval = POWER_SUPPLY_TYPE_WIRELESS;
charger->wc_w_state = 1;
} else if (reg_data & MAX77823_CHGIN_OK) {
val->intval = POWER_SUPPLY_TYPE_MAINS;
}
}
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = max77823_get_charger_state(charger);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (!charger->is_charging)
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
else if (charger->aicl_on)
{
val->intval = POWER_SUPPLY_CHARGE_TYPE_SLOW;
pr_info("%s: slow-charging mode\n", __func__);
}
else
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = max77823_get_charging_health(charger);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = charger->charging_current_max;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
val->intval = charger->charging_current;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = max77823_get_input_current(charger);
pr_debug("%s : set-current(%dmA), current now(%dmA)\n",
__func__, charger->charging_current, val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
break;
default:
return -EINVAL;
}
return 0;
}
static int max77823_chg_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct max77823_charger_data *charger =
container_of(psy, struct max77823_charger_data, psy_chg);
union power_supply_propval value;
int set_charging_current_max;
const int usb_charging_current = charger->pdata->charging_current[
POWER_SUPPLY_TYPE_USB].fast_charging_current;
switch (psp) {
/* val->intval : type */
case POWER_SUPPLY_PROP_STATUS:
charger->status = val->intval;
break;
case POWER_SUPPLY_PROP_ONLINE:
if (val->intval == POWER_SUPPLY_TYPE_POWER_SHARING) {
psy_do_property("ps", get,
POWER_SUPPLY_PROP_STATUS, value);
if (value.intval) {
max77823_update_reg(charger->i2c, MAX77823_CHG_CNFG_00,
(1 << CHG_CNFG_00_OTG_SHIFT) | (1 << CHG_CNFG_00_BOOST_SHIFT),
CHG_CNFG_00_OTG_MASK | CHG_CNFG_00_BOOST_MASK);
} else {
max77823_update_reg(charger->i2c, MAX77823_CHG_CNFG_00,
0,
CHG_CNFG_00_OTG_MASK | CHG_CNFG_00_BOOST_MASK);
}
break;
}
charger->cable_type = val->intval;
max77823_charger_function_control(charger);
break;
/* val->intval : input charging current */
case POWER_SUPPLY_PROP_CURRENT_MAX:
charger->charging_current_max = val->intval;
break;
/* val->intval : charging current */
case POWER_SUPPLY_PROP_CURRENT_AVG:
charger->charging_current = val->intval;
break;
/* val->intval : charging current */
case POWER_SUPPLY_PROP_CURRENT_NOW:
charger->charging_current = val->intval;
max77823_set_charge_current(charger,
charger->charging_current);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
charger->siop_level = val->intval;
if (charger->is_charging) {
/* decrease the charging current according to siop level */
int current_now =
charger->charging_current * val->intval / 100;
/* do forced set charging current */
if (current_now > 0 &&
current_now < usb_charging_current)
current_now = usb_charging_current;
if (charger->cable_type == POWER_SUPPLY_TYPE_MAINS) {
if (charger->siop_level < 100 ) {
set_charging_current_max = SIOP_INPUT_LIMIT_CURRENT;
} else {
set_charging_current_max =
charger->charging_current_max;
}
if (charger->siop_level < 100 &&
current_now > SIOP_CHARGING_LIMIT_CURRENT)
current_now = SIOP_CHARGING_LIMIT_CURRENT;
max77823_set_input_current(charger,
set_charging_current_max);
}
max77823_set_charge_current(charger, current_now);
}
break;
default:
return -EINVAL;
}
return 0;
}
static int max77823_debugfs_show(struct seq_file *s, void *data)
{
struct max77823_charger_data *charger = s->private;
u8 reg;
u8 reg_data;
seq_printf(s, "MAX77823 CHARGER IC :\n");
seq_printf(s, "===================\n");
for (reg = 0xB0; reg <= 0xC3; reg++) {
max77823_read_reg(charger->i2c, reg, &reg_data);
seq_printf(s, "0x%02x:\t0x%02x\n", reg, reg_data);
}
seq_printf(s, "\n");
return 0;
}
static int max77823_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, max77823_debugfs_show, inode->i_private);
}
static const struct file_operations max77823_debugfs_fops = {
.open = max77823_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void max77823_chg_isr_work(struct work_struct *work)
{
struct max77823_charger_data *charger =
container_of(work, struct max77823_charger_data, isr_work.work);
union power_supply_propval val;
if (charger->pdata->full_check_type ==
SEC_BATTERY_FULLCHARGED_CHGINT) {
val.intval = max77823_get_charger_state(charger);
switch (val.intval) {
case POWER_SUPPLY_STATUS_DISCHARGING:
pr_err("%s: Interrupted but Discharging\n", __func__);
break;
case POWER_SUPPLY_STATUS_NOT_CHARGING:
pr_err("%s: Interrupted but NOT Charging\n", __func__);
break;
case POWER_SUPPLY_STATUS_FULL:
pr_info("%s: Interrupted by Full\n", __func__);
psy_do_property("battery", set,
POWER_SUPPLY_PROP_STATUS, val);
break;
case POWER_SUPPLY_STATUS_CHARGING:
pr_err("%s: Interrupted but Charging\n", __func__);
break;
case POWER_SUPPLY_STATUS_UNKNOWN:
default:
pr_err("%s: Invalid Charger Status\n", __func__);
break;
}
}
if (charger->pdata->ovp_uvlo_check_type ==
SEC_BATTERY_OVP_UVLO_CHGINT) {
val.intval = max77823_get_charging_health(charger);
switch (val.intval) {
case POWER_SUPPLY_HEALTH_OVERHEAT:
case POWER_SUPPLY_HEALTH_COLD:
pr_err("%s: Interrupted but Hot/Cold\n", __func__);
break;
case POWER_SUPPLY_HEALTH_DEAD:
pr_err("%s: Interrupted but Dead\n", __func__);
break;
case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
case POWER_SUPPLY_HEALTH_UNDERVOLTAGE:
pr_info("%s: Interrupted by OVP/UVLO\n", __func__);
psy_do_property("battery", set,
POWER_SUPPLY_PROP_HEALTH, val);
break;
case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
pr_err("%s: Interrupted but Unspec\n", __func__);
break;
case POWER_SUPPLY_HEALTH_GOOD:
pr_err("%s: Interrupted but Good\n", __func__);
break;
case POWER_SUPPLY_HEALTH_UNKNOWN:
default:
pr_err("%s: Invalid Charger Health\n", __func__);
break;
}
}
}
static irqreturn_t max77823_chg_irq_thread(int irq, void *irq_data)
{
struct max77823_charger_data *charger = irq_data;
pr_info("%s : Charger interrup occured\n",
__func__);
if ((charger->pdata->full_check_type ==
SEC_BATTERY_FULLCHARGED_CHGINT) ||
(charger->pdata->ovp_uvlo_check_type ==
SEC_BATTERY_OVP_UVLO_CHGINT))
schedule_delayed_work(&charger->isr_work, 0);
return IRQ_HANDLED;
}
static void wpc_detect_work(struct work_struct *work)
{
struct max77823_charger_data *charger = container_of(work,
struct max77823_charger_data,
wpc_work.work);
int wc_w_state;
int retry_cnt;
union power_supply_propval value;
u8 reg_data;
pr_debug("%s\n", __func__);
max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_MASK, &reg_data);
reg_data &= ~(1 << 5);
max77823_write_reg(charger->i2c,
MAX77823_CHG_INT_MASK, reg_data);
/* check and unlock */
check_charger_unlock_state(charger);
retry_cnt = 0;
do {
max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_OK, &reg_data);
wc_w_state = (reg_data & MAX77823_WCIN_OK)
>> MAX77823_WCIN_OK_SHIFT;
msleep(50);
} while((retry_cnt++ < 2) && (wc_w_state == 0));
if ((charger->wc_w_state == 0) && (wc_w_state == 1)) {
value.intval = 1;
psy_do_property("wireless", set,
POWER_SUPPLY_PROP_ONLINE, value);
value.intval = POWER_SUPPLY_TYPE_WIRELESS;
pr_info("%s: wpc activated, set V_INT as PN\n",
__func__);
} else if ((charger->wc_w_state == 1) && (wc_w_state == 0)) {
if (!charger->is_charging)
max77823_set_charger_state(charger, true);
retry_cnt = 0;
do {
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_01, &reg_data);
reg_data = ((reg_data & MAX77823_CHG_DTLS)
>> MAX77823_CHG_DTLS_SHIFT);
msleep(50);
} while((retry_cnt++ < 2) && (reg_data == 0x8));
pr_info("%s: reg_data: 0x%x, charging: %d\n", __func__,
reg_data, charger->is_charging);
if (!charger->is_charging)
max77823_set_charger_state(charger, false);
if ((reg_data != 0x08)
&& (charger->cable_type == POWER_SUPPLY_TYPE_WIRELESS)) {
pr_info("%s: wpc uvlo, but charging\n", __func__);
queue_delayed_work(charger->wqueue, &charger->wpc_work,
msecs_to_jiffies(500));
return;
} else {
value.intval = 0;
psy_do_property("wireless", set,
POWER_SUPPLY_PROP_ONLINE, value);
pr_info("%s: wpc deactivated, set V_INT as PD\n",
__func__);
}
}
pr_info("%s: w(%d to %d)\n", __func__,
charger->wc_w_state, wc_w_state);
charger->wc_w_state = wc_w_state;
wake_unlock(&charger->wpc_wake_lock);
}
static irqreturn_t wpc_charger_irq(int irq, void *data)
{
struct max77823_charger_data *charger = data;
unsigned long delay;
u8 reg_data;
max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_MASK, &reg_data);
reg_data |= (1 << 5);
max77823_write_reg(charger->i2c,
MAX77823_CHG_INT_MASK, reg_data);
wake_lock(&charger->wpc_wake_lock);
#ifdef CONFIG_SAMSUNG_BATTERY_FACTORY
delay = msecs_to_jiffies(0);
#else
if (charger->wc_w_state)
delay = msecs_to_jiffies(500);
else
delay = msecs_to_jiffies(0);
#endif
queue_delayed_work(charger->wqueue, &charger->wpc_work,
delay);
return IRQ_HANDLED;
}
static irqreturn_t max77823_bypass_irq(int irq, void *data)
{
struct max77823_charger_data *charger = data;
u8 dtls_02;
u8 byp_dtls;
u8 chg_cnfg_00;
u8 vbus_state;
pr_info("%s: irq(%d)\n", __func__, irq);
/* check and unlock */
check_charger_unlock_state(charger);
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_02,
&dtls_02);
byp_dtls = ((dtls_02 & MAX77823_BYP_DTLS) >>
MAX77823_BYP_DTLS_SHIFT);
pr_info("%s: BYP_DTLS(0x%02x)\n", __func__, byp_dtls);
vbus_state = max77823_get_vbus_state(charger);
if (byp_dtls & 0x1) {
pr_info("%s: bypass overcurrent limit\n", __func__);
#ifdef CONFIG_USB_HOST_NOTIFY
sec_otg_notify(HNOTIFY_OVERCURRENT);
#endif
/* disable the register values just related to OTG and
keep the values about the charging */
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_00, &chg_cnfg_00);
chg_cnfg_00 &= ~(CHG_CNFG_00_OTG_MASK
| CHG_CNFG_00_BOOST_MASK
| CHG_CNFG_00_DIS_MUIC_CTRL_MASK);
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_00,
chg_cnfg_00);
}
return IRQ_HANDLED;
}
static void max77823_chgin_isr_work(struct work_struct *work)
{
struct max77823_charger_data *charger = container_of(work,
struct max77823_charger_data, chgin_work);
u8 chgin_dtls, chg_dtls, chg_cnfg_00, reg_data;
u8 prev_chgin_dtls = 0xff;
int battery_health;
union power_supply_propval value;
int stable_count = 0;
wake_lock(&charger->chgin_wake_lock);
max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_MASK, &reg_data);
reg_data |= (1 << 6);
max77823_write_reg(charger->i2c,
MAX77823_CHG_INT_MASK, reg_data);
while (1) {
psy_do_property("battery", get,
POWER_SUPPLY_PROP_HEALTH, value);
battery_health = value.intval;
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_00,
&chgin_dtls);
chgin_dtls = ((chgin_dtls & MAX77823_CHGIN_DTLS) >>
MAX77823_CHGIN_DTLS_SHIFT);
max77823_read_reg(charger->i2c,
MAX77823_CHG_DETAILS_01, &chg_dtls);
chg_dtls = ((chg_dtls & MAX77823_CHG_DTLS) >>
MAX77823_CHG_DTLS_SHIFT);
max77823_read_reg(charger->i2c,
MAX77823_CHG_CNFG_00, &chg_cnfg_00);
if (prev_chgin_dtls == chgin_dtls)
stable_count++;
else
stable_count = 0;
if (stable_count > 10) {
pr_info("%s: irq(%d), chgin(0x%x), chg_dtls(0x%x) prev 0x%x\n",
__func__, charger->irq_chgin,
chgin_dtls, chg_dtls, prev_chgin_dtls);
if (charger->is_charging) {
if ((chgin_dtls == 0x02) && \
(battery_health != POWER_SUPPLY_HEALTH_OVERVOLTAGE)) {
pr_info("%s: charger is over voltage\n",
__func__);
value.intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
psy_do_property("battery", set,
POWER_SUPPLY_PROP_HEALTH, value);
} else if (((chgin_dtls == 0x0) || (chgin_dtls == 0x01)) &&(chg_dtls & 0x08) && \
(chg_cnfg_00 & MAX77823_MODE_BUCK) && \
(chg_cnfg_00 & MAX77823_MODE_CHGR) && \
(battery_health != POWER_SUPPLY_HEALTH_UNDERVOLTAGE) && \
(charger->cable_type != POWER_SUPPLY_TYPE_WIRELESS)) {
pr_info("%s, vbus_state : 0x%d, chg_state : 0x%d\n", __func__, chgin_dtls, chg_dtls);
pr_info("%s: vBus is undervoltage\n", __func__);
value.intval = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
psy_do_property("battery", set,
POWER_SUPPLY_PROP_HEALTH, value);
} else if ((battery_health == \
POWER_SUPPLY_HEALTH_OVERVOLTAGE) &&
(chgin_dtls != 0x02)) {
pr_info("%s: vbus_state : 0x%d, chg_state : 0x%d\n", __func__, chgin_dtls, chg_dtls);
pr_info("%s: overvoltage->normal\n", __func__);
value.intval = POWER_SUPPLY_HEALTH_GOOD;
psy_do_property("battery", set,
POWER_SUPPLY_PROP_HEALTH, value);
} else if ((battery_health == \
POWER_SUPPLY_HEALTH_UNDERVOLTAGE) &&
!((chgin_dtls == 0x0) || (chgin_dtls == 0x01))){
pr_info("%s: vbus_state : 0x%d, chg_state : 0x%d\n", __func__, chgin_dtls, chg_dtls);
pr_info("%s: undervoltage->normal\n", __func__);
value.intval = POWER_SUPPLY_HEALTH_GOOD;
psy_do_property("battery", set,
POWER_SUPPLY_PROP_HEALTH, value);
max77823_set_input_current(charger,
charger->charging_current_max);
}
}
break;
}
prev_chgin_dtls = chgin_dtls;
msleep(100);
}
max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_MASK, &reg_data);
reg_data &= ~(1 << 6);
max77823_write_reg(charger->i2c,
MAX77823_CHG_INT_MASK, reg_data);
wake_unlock(&charger->chgin_wake_lock);
}
static irqreturn_t max77823_chgin_irq(int irq, void *data)
{
struct max77823_charger_data *charger = data;
queue_work(charger->wqueue, &charger->chgin_work);
return IRQ_HANDLED;
}
/* register chgin isr after sec_battery_probe */
static void max77823_chgin_init_work(struct work_struct *work)
{
struct max77823_charger_data *charger = container_of(work,
struct max77823_charger_data,
chgin_init_work.work);
int ret;
pr_info("%s \n", __func__);
ret = request_threaded_irq(charger->irq_chgin, NULL,
max77823_chgin_irq, 0, "chgin-irq", charger);
if (ret < 0) {
pr_err("%s: fail to request chgin IRQ: %d: %d\n",
__func__, charger->irq_chgin, ret);
}
}
#ifdef CONFIG_OF
static int sec_charger_read_u32_index_dt(const struct device_node *np,
const char *propname,
u32 index, u32 *out_value)
{
struct property *prop = of_find_property(np, propname, NULL);
u32 len = (index + 1) * sizeof(*out_value);
if (!prop)
return (-EINVAL);
if (!prop->value)
return (-ENODATA);
if (len > prop->length)
return (-EOVERFLOW);
*out_value = be32_to_cpup(((__be32 *)prop->value) + index);
return 0;
}
static int max77823_charger_parse_dt(struct max77823_charger_data *charger)
{
struct device_node *np = of_find_node_by_name(NULL, "charger");
sec_battery_platform_data_t *pdata = charger->pdata;
int ret = 0;
int i, len;
const u32 *p;
if (np == NULL) {
pr_err("%s np NULL\n", __func__);
} else {
ret = of_property_read_u32(np, "battery,chg_float_voltage",
&pdata->chg_float_voltage);
ret = of_property_read_u32(np, "battery,ovp_uvlo_check_type",
&pdata->ovp_uvlo_check_type);
ret = of_property_read_u32(np, "battery,full_check_type",
&pdata->full_check_type);
p = of_get_property(np, "battery,input_current_limit", &len);
len = len / sizeof(u32);
pdata->charging_current = kzalloc(sizeof(sec_charging_current_t) * len,
GFP_KERNEL);
for(i = 0; i < len; i++) {
ret = sec_charger_read_u32_index_dt(np,
"battery,input_current_limit", i,
&pdata->charging_current[i].input_current_limit);
ret = sec_charger_read_u32_index_dt(np,
"battery,fast_charging_current", i,
&pdata->charging_current[i].fast_charging_current);
ret = sec_charger_read_u32_index_dt(np,
"battery,full_check_current_1st", i,
&pdata->charging_current[i].full_check_current_1st);
ret = sec_charger_read_u32_index_dt(np,
"battery,full_check_current_2nd", i,
&pdata->charging_current[i].full_check_current_2nd);
}
}
return ret;
}
#endif
static int __devinit max77823_charger_probe(struct platform_device *pdev)
{
struct max77823_dev *max77823 = dev_get_drvdata(pdev->dev.parent);
struct max77823_platform_data *pdata = dev_get_platdata(max77823->dev);
struct max77823_charger_data *charger;
int ret = 0;
u8 reg_data;
pr_info("%s: Max77823 Charger Driver Loading\n", __func__);
charger = kzalloc(sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
pdata->charger_data = kzalloc(sizeof(sec_battery_platform_data_t), GFP_KERNEL);
if (!pdata->charger_data)
return -ENOMEM;
mutex_init(&charger->charger_mutex);
charger->dev = &pdev->dev;
charger->i2c = max77823->charger;
charger->pmic_i2c = max77823->i2c;
charger->pdata = pdata->charger_data;
charger->aicl_on = false;
charger->siop_level = 100;
charger->max77823_pdata = pdata;
#if defined(CONFIG_OF)
ret = max77823_charger_parse_dt(charger);
if (ret < 0) {
pr_err("%s not found charger dt! ret[%d]\n",
__func__, ret);
}
#endif
platform_set_drvdata(pdev, charger);
charger->psy_chg.name = "max77823-charger";
charger->psy_chg.type = POWER_SUPPLY_TYPE_UNKNOWN;
charger->psy_chg.get_property = max77823_chg_get_property;
charger->psy_chg.set_property = max77823_chg_set_property;
charger->psy_chg.properties = max77823_charger_props;
charger->psy_chg.num_properties = ARRAY_SIZE(max77823_charger_props);
max77823_charger_initialize(charger);
(void) debugfs_create_file("max77823-regs",
S_IRUGO, NULL, (void *)charger, &max77823_debugfs_fops);
charger->wqueue =
create_singlethread_workqueue(dev_name(&pdev->dev));
if (!charger->wqueue) {
pr_err("%s: Fail to Create Workqueue\n", __func__);
goto err_free;
}
wake_lock_init(&charger->chgin_wake_lock, WAKE_LOCK_SUSPEND,
"charger-chgin");
INIT_WORK(&charger->chgin_work, max77823_chgin_isr_work);
INIT_DELAYED_WORK(&charger->chgin_init_work, max77823_chgin_init_work);
wake_lock_init(&charger->wpc_wake_lock, WAKE_LOCK_SUSPEND,
"charger-wpc");
INIT_DELAYED_WORK(&charger->wpc_work, wpc_detect_work);
ret = power_supply_register(&pdev->dev, &charger->psy_chg);
if (ret) {
pr_err("%s: Failed to Register psy_chg\n", __func__);
goto err_power_supply_register;
}
if (charger->pdata->chg_irq) {
INIT_DELAYED_WORK(&charger->isr_work, max77823_chg_isr_work);
ret = request_threaded_irq(charger->pdata->chg_irq,
NULL, max77823_chg_irq_thread,
charger->pdata->chg_irq_attr,
"charger-irq", charger);
if (ret) {
pr_err("%s: Failed to Reqeust IRQ\n", __func__);
goto err_irq;
}
ret = enable_irq_wake(charger->pdata->chg_irq);
if (ret < 0)
pr_err("%s: Failed to Enable Wakeup Source(%d)\n",
__func__, ret);
}
charger->wc_w_irq = pdata->irq_base + MAX77823_CHG_IRQ_WCIN_I;
ret = request_threaded_irq(charger->wc_w_irq,
NULL, wpc_charger_irq,
IRQF_TRIGGER_FALLING,
"wpc-int", charger);
if (ret) {
pr_err("%s: Failed to Reqeust IRQ\n", __func__);
goto err_wc_irq;
}
max77823_read_reg(charger->i2c,
MAX77823_CHG_INT_OK, &reg_data);
charger->wc_w_state = (reg_data & MAX77823_WCIN_OK)
>> MAX77823_WCIN_OK_SHIFT;
charger->irq_chgin = pdata->irq_base + MAX77823_CHG_IRQ_CHGIN_I;
/* enable chgin irq after sec_battery_probe */
queue_delayed_work(charger->wqueue, &charger->chgin_init_work,
msecs_to_jiffies(3000));
charger->irq_bypass = pdata->irq_base + MAX77823_CHG_IRQ_BYP_I;
ret = request_threaded_irq(charger->irq_bypass, NULL,
max77823_bypass_irq, 0, "bypass-irq", charger);
if (ret < 0)
pr_err("%s: fail to request bypass IRQ: %d: %d\n",
__func__, charger->irq_bypass, ret);
pr_info("%s: Max77823 Charger Driver Loaded\n", __func__);
return 0;
err_wc_irq:
free_irq(charger->pdata->chg_irq, NULL);
err_irq:
power_supply_unregister(&charger->psy_chg);
err_power_supply_register:
destroy_workqueue(charger->wqueue);
err_free:
kfree(charger);
return ret;
}
static int __devexit max77823_charger_remove(struct platform_device *pdev)
{
struct max77823_charger_data *charger =
platform_get_drvdata(pdev);
destroy_workqueue(charger->wqueue);
free_irq(charger->wc_w_irq, NULL);
free_irq(charger->pdata->chg_irq, NULL);
power_supply_unregister(&charger->psy_chg);
kfree(charger);
return 0;
}
#if defined CONFIG_PM
static int max77823_charger_suspend(struct device *dev)
{
return 0;
}
static int max77823_charger_resume(struct device *dev)
{
return 0;
}
#else
#define max77823_charger_suspend NULL
#define max77823_charger_resume NULL
#endif
static void max77823_charger_shutdown(struct device *dev)
{
struct max77823_charger_data *charger =
dev_get_drvdata(dev);
u8 reg_data;
pr_info("%s: MAX77823 Charger driver shutdown\n", __func__);
if (!charger->i2c) {
pr_err("%s: no max77823 i2c client\n", __func__);
return;
}
reg_data = 0x04;
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_00, reg_data);
reg_data = 0x19;
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_09, reg_data);
reg_data = 0x19;
max77823_write_reg(charger->i2c,
MAX77823_CHG_CNFG_10, reg_data);
pr_info("func:%s \n", __func__);
}
#ifdef CONFIG_OF
static struct of_device_id max77823_charger_dt_ids[] = {
{ .compatible = "samsung,max77823-charger" },
{ }
};
MODULE_DEVICE_TABLE(of, max77823_charger_dt_ids);
#endif
static SIMPLE_DEV_PM_OPS(max77823_charger_pm_ops, max77823_charger_suspend,
max77823_charger_resume);
static struct platform_driver max77823_charger_driver = {
.driver = {
.name = "max77823-charger",
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &max77823_charger_pm_ops,
#endif
.shutdown = max77823_charger_shutdown,
#ifdef CONFIG_OF
.of_match_table = max77823_charger_dt_ids,
#endif
},
.probe = max77823_charger_probe,
.remove = __devexit_p(max77823_charger_remove),
};
static int __init max77823_charger_init(void)
{
pr_info("%s : \n", __func__);
return platform_driver_register(&max77823_charger_driver);
}
static void __exit max77823_charger_exit(void)
{
platform_driver_unregister(&max77823_charger_driver);
}
module_init(max77823_charger_init);
module_exit(max77823_charger_exit);
MODULE_DESCRIPTION("Samsung MAX77823 Charger Driver");
MODULE_AUTHOR("Samsung Electronics");
MODULE_LICENSE("GPL");
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