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android_kernel_samsung_a7y1.../drivers/battery/s2mu003_charger.c

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A750FNXXU4CTG1
2023-04-07 19:05:06 +00:00
/* drivers/battery/s2mu003_charger.c
* S2MU003 Charger Driver
*
* Copyright (C) 2013
* Author: Patrick Chang <patrick_chang@richtek.com>
*
* 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; either version 2
* of the License, or (at your option) any later version.
*/
#include <linux/mfd/samsung/s2mu003.h>
#include <linux/battery/charger/s2mu003_charger.h>
#include <linux/version.h>
#define ENABLE_MIVR 0
#define EN_OVP_IRQ 1
#define EN_IEOC_IRQ 1
#define EN_RECHG_REQ_IRQ 0
#define EN_TR_IRQ 0
#define EN_MIVR_SW_REGULATION 0
#define EN_BST_IRQ 0
#define MINVAL(a, b) ((a <= b) ? a : b)
#define EOC_DEBOUNCE_CNT 2
#define HEALTH_DEBOUNCE_CNT 3
#define EOC_SLEEP 200
#define EOC_TIMEOUT (EOC_SLEEP * 6)
#ifndef EN_TEST_READ
#define EN_TEST_READ 0
#endif
static int s2mu003_reg_map[] = {
S2MU003_CHG_STATUS1,
S2MU003_CHG_CTRL1,
S2MU003_CHG_CTRL2,
S2MU003_CHG_CTRL3,
S2MU003_CHG_CTRL4,
S2MU003_CHG_CTRL5,
S2MU003_SOFTRESET,
S2MU003_CHG_CTRL6,
S2MU003_CHG_CTRL7,
S2MU003_CHG_CTRL8,
S2MU003_CHG_STATUS2,
S2MU003_CHG_STATUS3,
S2MU003_CHG_STATUS4,
S2MU003_CHG_CTRL9,
};
struct s2mu003_charger_data {
struct i2c_client *client;
s2mu003_mfd_chip_t *s2mu003;
struct power_supply psy_chg;
s2mu003_charger_platform_data_t *pdata;
int charging_current;
int siop_level;
int cable_type;
bool is_charging;
struct mutex io_lock;
/* register programming */
int reg_addr;
int reg_data;
bool full_charged;
bool ovp;
int unhealth_cnt;
int status;
};
static enum power_supply_property sec_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_OTG_CONTROL,
};
static int s2mu003_get_charging_health(struct s2mu003_charger_data *charger);
static void s2mu003_read_regs(struct i2c_client *i2c, char *str)
{
u8 data = 0;
int i = 0;
for (i = 0; i < ARRAY_SIZE(s2mu003_reg_map); i++) {
data = s2mu003_reg_read(i2c, s2mu003_reg_map[i]);
sprintf(str+strlen(str), "0x%02x, ", data);
}
}
static void s2mu003_test_read(struct i2c_client *i2c)
{
int data;
char str[1024] = {0,};
int i;
/* S2MU003 REG: 0x00 ~ 0x08 */
for (i = 0x0; i <= 0x0E; i++) {
data = s2mu003_reg_read(i2c, i);
sprintf(str+strlen(str), "0x%02x, ", data);
}
pr_info("%s: %s\n", __func__, str);
}
static void s2mu003_charger_otg_control(struct s2mu003_charger_data *charger,
bool enable)
{
pr_info("%s: called charger otg control : %s\n", __func__,
enable ? "on" : "off");
if (!enable) {
/* turn off OTG */
s2mu003_clr_bits(charger->client, S2MU003_CHG_CTRL1, S2MU003_OPAMODE_MASK);
s2mu003_clr_bits(charger->client, S2MU003_CHG_CTRL8, 0x80);
} else {
/* Set OTG boost vout = 5V, turn on OTG */
s2mu003_assign_bits(charger->client,
S2MU003_CHG_CTRL2, S2MU003_VOREG_MASK,
0x23 << S2MU003_VOREG_SHIFT);
s2mu003_set_bits(charger->client,
S2MU003_CHG_CTRL1, S2MU003_OPAMODE_MASK);
s2mu003_set_bits(charger->client, S2MU003_CHG_CTRL8, 0x80);
charger->cable_type = POWER_SUPPLY_TYPE_OTG;
}
}
/* this function will work well on CHIP_REV = 3 or later */
static void s2mu003_enable_charger_switch(struct s2mu003_charger_data *charger,
int onoff)
{
int prev_charging_status = charger->is_charging;
union power_supply_propval val;
charger->is_charging = onoff ? true : false;
if ((onoff > 0) && (prev_charging_status == false)) {
pr_info("%s: turn on charger\n", __func__);
s2mu003_set_bits(charger->client, S2MU003_CHG_CTRL3, S2MU003_CHG_EN_MASK);
} else if (onoff == 0) {
psy_do_property("battery", get,
POWER_SUPPLY_PROP_STATUS, val);
if (val.intval != POWER_SUPPLY_STATUS_FULL)
charger->full_charged = false;
pr_info("%s: turn off charger\n", __func__);
charger->charging_current = 0;
s2mu003_clr_bits(charger->client, S2MU003_CHG_CTRL3, S2MU003_CHG_EN_MASK);
} else {
pr_info("%s: repeated to set charger switch(%d), prev stat = %d\n",
__func__, onoff, prev_charging_status ? 1 : 0);
}
}
static void s2mu003_enable_charging_termination(struct i2c_client *i2c,
int onoff)
{
pr_info("%s:[BATT] Do termination set(%d)\n", __func__, onoff);
if (onoff)
s2mu003_set_bits(i2c, S2MU003_CHG_CTRL1, S2MU003_TEEN_MASK);
else
s2mu003_clr_bits(i2c, S2MU003_CHG_CTRL1, S2MU003_TEEN_MASK);
}
static int s2mu003_input_current_limit[] = {
100,
500,
700,
900,
1000,
1500,
2000,
};
static void s2mu003_set_input_current_limit(struct s2mu003_charger_data *charger,
int current_limit)
{
int i = 0, curr_reg = 0;
for (i = 0; i < ARRAY_SIZE(s2mu003_input_current_limit); i++) {
if (current_limit <= s2mu003_input_current_limit[i])
curr_reg = i+1;
}
if (curr_reg < 0)
curr_reg = 0;
mutex_lock(&charger->io_lock);
s2mu003_assign_bits(charger->client, S2MU003_CHG_CTRL1, S2MU003_AICR_LIMIT_MASK,
curr_reg << S2MU003_AICR_LIMIT_SHIFT);
mutex_unlock(&charger->io_lock);
}
static int s2mu003_get_input_current_limit(struct i2c_client *i2c)
{
int ret;
ret = s2mu003_reg_read(i2c, S2MU003_CHG_CTRL1);
if (ret < 0)
return ret;
ret &= S2MU003_AICR_LIMIT_MASK;
ret >>= S2MU003_AICR_LIMIT_SHIFT;
if (ret == 0)
return 2000 + 1; /* no limitation */
return s2mu003_input_current_limit[ret - 1];
}
static void s2mu003_set_regulation_voltage(struct s2mu003_charger_data *charger,
int float_voltage)
{
int data;
if (float_voltage < 3650)
data = 0;
else if (float_voltage >= 3650 && float_voltage <= 4375)
data = (float_voltage - 3650) / 25;
else
data = 0x23;
mutex_lock(&charger->io_lock);
s2mu003_assign_bits(charger->client,
S2MU003_CHG_CTRL2, S2MU003_VOREG_MASK,
data << S2MU003_VOREG_SHIFT);
mutex_unlock(&charger->io_lock);
}
static void s2mu003_set_fast_charging_current(struct i2c_client *i2c,
int charging_current)
{
int data;
if (charging_current < 700)
data = 0;
else if (charging_current >= 700 && charging_current <= 2000)
data = (charging_current - 700) / 100;
else
data = 0xd;
s2mu003_assign_bits(i2c, S2MU003_CHG_CTRL5, S2MU003_ICHRG_MASK,
data << S2MU003_ICHRG_SHIFT);
}
static int s2mu003_eoc_level[] = {
0,
150,
200,
250,
300,
400,
500,
600,
};
static int s2mu003_get_eoc_level(int eoc_current)
{
int i;
for (i = 0; i < ARRAY_SIZE(s2mu003_eoc_level); i++) {
if (eoc_current < s2mu003_eoc_level[i]) {
if (i == 0)
return 0;
return i - 1;
}
}
return ARRAY_SIZE(s2mu003_eoc_level) - 1;
}
static int s2mu003_get_current_eoc_setting(struct s2mu003_charger_data *charger)
{
int ret;
mutex_lock(&charger->io_lock);
ret = s2mu003_reg_read(charger->client, S2MU003_CHG_CTRL4);
mutex_unlock(&charger->io_lock);
if (ret < 0) {
pr_info("%s: warning --> fail to read i2c register(%d)\n", __func__, ret);
return ret;
}
return s2mu003_eoc_level[(S2MU003_IEOC_MASK & ret) >> S2MU003_IEOC_SHIFT];
}
static int s2mu003_get_fast_charging_current(struct i2c_client *i2c)
{
int data = s2mu003_reg_read(i2c, S2MU003_CHG_CTRL5);
if (data < 0)
return data;
data = (data >> 4) & 0x0f;
if (data > 0xd)
data = 0xd;
return data * 100 + 700;
}
static void s2mu003_set_termination_current_limit(struct i2c_client *i2c,
int current_limit)
{
int data = s2mu003_get_eoc_level(current_limit);
int ret;
pr_info("%s : Set Termination\n", __func__);
ret = s2mu003_assign_bits(i2c, S2MU003_CHG_CTRL4, S2MU003_IEOC_MASK,
data << S2MU003_IEOC_SHIFT);
/* reset chg_en */
s2mu003_clr_bits(i2c, S2MU003_CHG_CTRL3, S2MU003_CHG_EN_MASK);
s2mu003_set_bits(i2c, S2MU003_CHG_CTRL3, S2MU003_CHG_EN_MASK);
}
/* eoc re set */
static void s2mu003_set_charging_current(struct s2mu003_charger_data *charger,
int eoc)
{
int adj_current = 0;
adj_current = charger->charging_current * charger->siop_level / 100;
mutex_lock(&charger->io_lock);
s2mu003_set_fast_charging_current(charger->client,
adj_current);
if (eoc) {
/* set EOC RESET */
s2mu003_set_termination_current_limit(charger->client, eoc);
}
mutex_unlock(&charger->io_lock);
}
enum {
S2MU003_MIVR_DISABLE = 0,
S2MU003_MIVR_4200MV,
S2MU003_MIVR_4300MV,
S2MU003_MIVR_4400MV,
S2MU003_MIVR_4500MV,
S2MU003_MIVR_4600MV,
S2MU003_MIVR_4700MV,
S2MU003_MIVR_4800MV,
};
#if ENABLE_MIVR
/* charger input regulation voltage setting */
static void s2mu003_set_mivr_level(struct s2mu003_charger_data *charger)
{
int mivr;
switch (charger->cable_type) {
case POWER_SUPPLY_TYPE_USB ... POWER_SUPPLY_TYPE_USB_ACA:
mivr = S2MU003_MIVR_4600MV;
break;
default:
mivr = S2MU003_MIVR_DISABLE;
}
mutex_lock(&charger->io_lock);
s2mu003_assign_bits(charger->i2c_client,
S2MU003_CHG_CTRL4, S2MU003_MIVR_MASK, mivr << S2MU003_MIVR_SHIFT);
mutex_unlock(&charger->io_lock);
}
#endif /*ENABLE_MIVR*/
static void s2mu003_configure_charger(struct s2mu003_charger_data *charger)
{
int eoc;
union power_supply_propval val;
pr_info("%s : Set config charging\n", __func__);
if (charger->charging_current < 0) {
pr_info("%s : OTG is activated. Ignore command!\n",
__func__);
return;
}
#if ENABLE_MIVR
s2mu003_set_mivr_level(charger);
#endif /*DISABLE_MIVR*/
psy_do_property("battery", get,
POWER_SUPPLY_PROP_CHARGE_NOW, val);
/* TEMP_TEST : disable charging current termination for 2nd charging */
/* s2mu003_enable_charging_termination(charger->s2mu003->i2c_client, 1);*/
/* Input current limit */
pr_info("%s : input current (%dmA)\n",
__func__, charger->pdata->charging_current_table
[charger->cable_type].input_current_limit);
s2mu003_set_input_current_limit(charger,
charger->pdata->charging_current_table
[charger->cable_type].input_current_limit);
/* Float voltage */
pr_info("%s : float voltage (%dmV)\n",
__func__, charger->pdata->chg_float_voltage);
s2mu003_set_regulation_voltage(charger,
charger->pdata->chg_float_voltage);
charger->charging_current = charger->pdata->charging_current_table
[charger->cable_type].fast_charging_current;
eoc = charger->pdata->charging_current_table
[charger->cable_type].full_check_current_1st;
/* Fast charge and Termination current */
pr_info("%s : fast charging current (%dmA)\n",
__func__, charger->charging_current);
pr_info("%s : termination current (%dmA)\n",
__func__, eoc);
s2mu003_set_charging_current(charger, eoc);
s2mu003_enable_charger_switch(charger, 1);
}
/* here is set init charger data */
static bool s2mu003_chg_init(struct s2mu003_charger_data *charger)
{
int ret = 0, rev_id;
s2mu003_set_bits(charger->client, 0x6b, 0x01);
/* delay 100 us to wait for normal read (from e-fuse) */
msleep(20);
ret = s2mu003_reg_read(charger->client, 0x03);
s2mu003_clr_bits(charger->client, 0x6b, 0x01);
if (ret < 0)
pr_err("%s : failed to read revision ID\n", __func__);
rev_id = ret & 0x0f;
if (charger->pdata->is_750kHz_switching)
ret = s2mu003_clr_bits(charger->client, S2MU003_CHG_CTRL1,
S2MU003_SEL_SWFREQ_MASK);
else
ret = s2mu003_set_bits(charger->client, S2MU003_CHG_CTRL1,
S2MU003_SEL_SWFREQ_MASK);
/* Disable Timer function (Charging timeout fault) */
s2mu003_clr_bits(charger->client,
S2MU003_CHG_CTRL3, S2MU003_TIMEREN_MASK);
s2mu003_clr_bits(charger->client, S2MU003_CHG_CTRL3, S2MU003_CHG_EN_MASK);
s2mu003_set_bits(charger->client, S2MU003_CHG_CTRL3, S2MU003_CHG_EN_MASK);
/* Disable TE */
s2mu003_enable_charging_termination(charger->client, 0);
/* EMI improvement , let reg0x18 bit2~5 be 1100*/
/* s2mu003_assign_bits(charger->s2mu003->i2c_client, 0x18, 0x3C, 0x30); */
/* MUST set correct regulation voltage first
* Before MUIC pass cable type information to charger
* charger would be already enabled (default setting)
* it might cause EOC event by incorrect regulation voltage */
s2mu003_set_regulation_voltage(charger,
charger->pdata->chg_float_voltage);
#if !(ENABLE_MIVR)
s2mu003_assign_bits(charger->client,
S2MU003_CHG_CTRL4, S2MU003_MIVR_MASK,
S2MU003_MIVR_DISABLE << S2MU003_MIVR_SHIFT);
#endif
return true;
}
static int s2mu003_get_charging_status(struct s2mu003_charger_data *charger)
{
int status = POWER_SUPPLY_STATUS_UNKNOWN;
int ret;
ret = s2mu003_reg_read(charger->client, S2MU003_CHG_STATUS1);
if (ret < 0) {
pr_info("Error : can't get charging status (%d)\n", ret);
}
if (charger->full_charged)
return POWER_SUPPLY_STATUS_FULL;
switch (ret & 0x30) {
case 0x00:
status = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case 0x20:
case 0x10:
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x30:
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
}
/* TEMP_TEST : when OTG is enabled(charging_current -1), handle OTG func. */
if (charger->charging_current < 0) {
/* For OTG mode, S2MU003 would still report "charging" */
status = POWER_SUPPLY_STATUS_DISCHARGING;
ret = s2mu003_reg_read(charger->client, S2MU003_CHG_IRQ3);
if (ret & 0x80) {
pr_info("%s: otg overcurrent limit\n", __func__);
s2mu003_charger_otg_control(charger, false);
}
}
return status;
}
static int s2mu003_get_charge_type(struct i2c_client *iic)
{
int status = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
int ret;
ret = s2mu003_reg_read(iic, S2MU003_CHG_STATUS1);
if (ret < 0)
dev_err(&iic->dev, "%s fail\n", __func__);
switch (ret&0x40) {
case 0x40:
status = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
default:
/* pre-charge mode */
status = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
}
return status;
}
static bool s2mu003_get_batt_present(struct i2c_client *iic)
{
int ret = s2mu003_reg_read(iic, S2MU003_CHG_STATUS2);
if (ret < 0)
return false;
return (ret & 0x08) ? false : true;
}
static int s2mu003_get_charging_health(struct s2mu003_charger_data *charger)
{
int ret = s2mu003_reg_read(charger->client, S2MU003_CHG_STATUS1);
if (ret < 0)
return POWER_SUPPLY_HEALTH_UNKNOWN;
if (ret & (0x03 << 2)) {
charger->ovp = false;
charger->unhealth_cnt = 0;
return POWER_SUPPLY_HEALTH_GOOD;
}
charger->unhealth_cnt++;
if (charger->unhealth_cnt < HEALTH_DEBOUNCE_CNT)
return POWER_SUPPLY_HEALTH_GOOD;
charger->unhealth_cnt = HEALTH_DEBOUNCE_CNT;
if (charger->ovp)
return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
return POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
}
static int sec_chg_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int chg_curr, aicr;
struct s2mu003_charger_data *charger =
container_of(psy, struct s2mu003_charger_data, psy_chg);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = charger->charging_current ? 1 : 0;
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = s2mu003_get_charging_status(charger);
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = s2mu003_get_charging_health(charger);
s2mu003_test_read(charger->client);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = 2000;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (charger->charging_current) {
aicr = s2mu003_get_input_current_limit(charger->client);
chg_curr = s2mu003_get_fast_charging_current(charger->client);
val->intval = MINVAL(aicr, chg_curr);
} else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = s2mu003_get_charge_type(charger->client);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = s2mu003_get_batt_present(charger->client);
break;
default:
return -EINVAL;
}
return 0;
}
static int sec_chg_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct s2mu003_charger_data *charger =
container_of(psy, struct s2mu003_charger_data, psy_chg);
int eoc;
int previous_cable_type = charger->cable_type;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
charger->status = val->intval;
break;
/* val->intval : type */
case POWER_SUPPLY_PROP_ONLINE:
charger->cable_type = val->intval;
if (charger->cable_type == POWER_SUPPLY_TYPE_BATTERY ||
charger->cable_type == POWER_SUPPLY_TYPE_UNKNOWN) {
pr_info("%s:[BATT] Type Battery\n", __func__);
s2mu003_enable_charger_switch(charger, 0);
if (previous_cable_type == POWER_SUPPLY_TYPE_OTG)
s2mu003_charger_otg_control(charger, false);
} else if (charger->cable_type == POWER_SUPPLY_TYPE_OTG) {
pr_info("%s: OTG mode\n", __func__);
s2mu003_charger_otg_control(charger, true);
} else {
pr_info("%s:[BATT] Set charging"
", Cable type = %d\n", __func__, charger->cable_type);
/* Enable charger */
s2mu003_configure_charger(charger);
}
#if EN_TEST_READ
msleep(100);
s2mu003_test_read(charger->s2mu003->i2c_client);
#endif
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* set charging current */
if (charger->is_charging) {
/* decrease the charging current according to siop level */
charger->siop_level = val->intval;
pr_info("%s:SIOP level = %d, chg current = %d\n", __func__,
val->intval, charger->charging_current);
eoc = s2mu003_get_current_eoc_setting(charger);
s2mu003_set_charging_current(charger, 0);
}
break;
case POWER_SUPPLY_PROP_POWER_NOW:
eoc = s2mu003_get_current_eoc_setting(charger);
pr_info("%s:Set Power Now -> chg current = %d mA, eoc = %d mA\n", __func__,
val->intval, eoc);
s2mu003_set_charging_current(charger, 0);
break;
case POWER_SUPPLY_PROP_CHARGE_OTG_CONTROL:
s2mu003_charger_otg_control(charger, val->intval);
break;
default:
return -EINVAL;
}
return 0;
}
ssize_t s2mu003_chg_show_attrs(struct device *dev,
const ptrdiff_t offset, char *buf)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct s2mu003_charger_data *charger =
container_of(psy, struct s2mu003_charger_data, psy_chg);
int i = 0;
char *str = NULL;
switch (offset) {
case CHG_REG:
i += scnprintf(buf + i, PAGE_SIZE - i, "%x\n",
charger->reg_addr);
break;
case CHG_DATA:
i += scnprintf(buf + i, PAGE_SIZE - i, "%x\n",
charger->reg_data);
break;
case CHG_REGS:
str = kzalloc(sizeof(char) * 256, GFP_KERNEL);
if (!str)
return -ENOMEM;
s2mu003_read_regs(charger->client, str);
i += scnprintf(buf + i, PAGE_SIZE - i, "%s\n",
str);
kfree(str);
break;
default:
i = -EINVAL;
break;
}
return i;
}
ssize_t s2mu003_chg_store_attrs(struct device *dev,
const ptrdiff_t offset,
const char *buf, size_t count)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct s2mu003_charger_data *charger =
container_of(psy, struct s2mu003_charger_data, psy_chg);
int ret = 0;
int x = 0;
uint8_t data = 0;
switch (offset) {
case CHG_REG:
if (sscanf(buf, "%x\n", &x) == 1) {
charger->reg_addr = x;
data = s2mu003_reg_read(charger->client,
charger->reg_addr);
charger->reg_data = data;
dev_dbg(dev, "%s: (read) addr = 0x%x, data = 0x%x\n",
__func__, charger->reg_addr, charger->reg_data);
ret = count;
}
break;
case CHG_DATA:
if (sscanf(buf, "%x\n", &x) == 1) {
data = (u8)x;
dev_dbg(dev, "%s: (write) addr = 0x%x, data = 0x%x\n",
__func__, charger->reg_addr, data);
ret = s2mu003_reg_write(charger->client,
charger->reg_addr, data);
if (ret < 0) {
dev_dbg(dev, "I2C write fail Reg0x%x = 0x%x\n",
(int)charger->reg_addr, (int)data);
}
ret = count;
}
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
struct s2mu003_chg_irq_handler {
char *name;
int irq_index;
irqreturn_t (*handler)(int irq, void *data);
};
#if EN_OVP_IRQ
static irqreturn_t s2mu003_chg_vin_ovp_irq_handler(int irq, void *data)
{
struct s2mu003_charger_data *charger = data;
union power_supply_propval value;
int status;
/* Delay 100ms for debounce */
msleep(100);
status = s2mu003_reg_read(charger->client, S2MU003_CHG_STATUS1);
/* PWR ready = 0*/
if ((status & (0x04)) == 0) {
/* No need to disable charger,
* H/W will do it automatically */
charger->unhealth_cnt = HEALTH_DEBOUNCE_CNT;
charger->ovp = true;
pr_info("%s: OVP triggered\n", __func__);
value.intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
psy_do_property("battery", set,
POWER_SUPPLY_PROP_HEALTH, value);
} else {
charger->unhealth_cnt = 0;
charger->ovp = false;
}
return IRQ_HANDLED;
}
#endif /* EN_OVP_IRQ */
#if EN_IEOC_IRQ
static irqreturn_t s2mu003_chg_ieoc_irq_handler(int irq, void *data)
{
struct s2mu003_charger_data *charger = data;
pr_info("%s : Full charged\n", __func__);
charger->full_charged = true;
return IRQ_HANDLED;
}
#endif /* EN_IEOC_IRQ */
#if EN_RECHG_REQ_IRQ
static irqreturn_t s2mu003_chg_rechg_request_irq_handler(int irq, void *data)
{
struct s2mu003_charger_data *charger = data;
pr_info("%s: Recharging requesting\n", __func__);
charger->full_charged = false;
return IRQ_HANDLED;
}
#endif /* EN_RECHG_REQ_IRQ */
#if EN_TR_IRQ
static irqreturn_t s2mu003_chg_otp_tr_irq_handler(int irq, void *data)
{
pr_info("%s : Over temperature : thermal regulation loop active\n",
__func__);
/* if needs callback, do it here */
return IRQ_HANDLED;
}
#endif
const struct s2mu003_chg_irq_handler s2mu003_chg_irq_handlers[] = {
#if EN_OVP_IRQ
{
.name = "chg_cinovp",
.handler = s2mu003_chg_vin_ovp_irq_handler,
.irq_index = S2MU003_CINOVP_IRQ,
},
#endif /* EN_OVP_IRQ */
#if EN_IEOC_IRQ
{
.name = "chg_eoc",
.handler = s2mu003_chg_ieoc_irq_handler,
.irq_index = S2MU003_EOC_IRQ,
},
#endif /* EN_IEOC_IRQ */
#if EN_RECHG_REQ_IRQ
{
.name = "chg_rechg",
.handler = s2mu003_chg_rechg_request_irq_handler,
.irq_index = S2MU003_RECHG_IRQ,
},
#endif /* EN_RECHG_REQ_IRQ*/
#if EN_TR_IRQ
{
.name = "chg_chgtr",
.handler = s2mu003_chg_otp_tr_irq_handler,
.irq_index = S2MU003_CHGTR_IRQ,
},
#endif /* EN_TR_IRQ */
#if EN_MIVR_SW_REGULATION
{
.name = "chg_chgvinvr",
.handler = s2mu003_chg_mivr_irq_handler,
.irq_index = S2MU003_CHGVINVR_IRQ,
},
#endif /* EN_MIVR_SW_REGULATION */
#if EN_BST_IRQ
{
.name = "chg_bstinlv",
.handler = s2mu003_chg_otg_fail_irq_handler,
.irq_index = S2MU003_BSTINLV_IRQ,
},
{
.name = "chg_bstilim",
.handler = s2mu003_chg_otg_fail_irq_handler,
.irq_index = S2MU003_BSTILIM_IRQ,
},
{
.name = "chg_vmidovp",
.handler = s2mu003_chg_otg_fail_irq_handler,
.irq_index = S2MU003_VMIDOVP_IRQ,
},
#endif /* EN_BST_IRQ */
};
static int register_irq(struct platform_device *pdev,
struct s2mu003_charger_data *charger)
{
int irq;
int i, j;
int ret;
const struct s2mu003_chg_irq_handler *irq_handler = s2mu003_chg_irq_handlers;
const char *irq_name;
for (i = 0; i < ARRAY_SIZE(s2mu003_chg_irq_handlers); i++) {
irq_name = s2mu003_get_irq_name_by_index(irq_handler[i].irq_index);
irq = platform_get_irq_byname(pdev, irq_name);
ret = request_threaded_irq(irq, NULL, irq_handler[i].handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING |
IRQF_NO_SUSPEND, irq_name, charger);
if (ret < 0) {
pr_err("%s : Failed to request IRQ (%s): #%d: %d\n",
__func__, irq_name, irq, ret);
goto err_irq;
}
pr_info("%s : Register IRQ%d(%s) successfully\n",
__func__, irq, irq_name);
}
return 0;
err_irq:
for (j = 0; j < i; j++) {
irq_name = s2mu003_get_irq_name_by_index(irq_handler[j].irq_index);
irq = platform_get_irq_byname(pdev, irq_name);
free_irq(irq, charger);
}
return ret;
}
static void unregister_irq(struct platform_device *pdev,
struct s2mu003_charger_data *charger)
{
int irq;
int i;
const char *irq_name;
const struct s2mu003_chg_irq_handler *irq_handler = s2mu003_chg_irq_handlers;
for (i = 0; i < ARRAY_SIZE(s2mu003_chg_irq_handlers); i++) {
irq_name = s2mu003_get_irq_name_by_index(irq_handler[i].irq_index);
irq = platform_get_irq_byname(pdev, irq_name);
free_irq(irq, charger);
}
}
#ifdef CONFIG_OF
static int s2mu003_charger_parse_dt(struct device *dev,
struct s2mu003_charger_platform_data *pdata)
{
struct device_node *np = of_find_node_by_name(NULL, "s2mu003-charger");
const u32 *p;
int ret, i, len;
if (of_find_property(np, "is_750kHz_switching", NULL))
pdata->is_750kHz_switching = 1;
if (of_find_property(np, "is_fixed_switching", NULL))
pdata->is_fixed_switching = 1;
pr_info("%s : is_750kHz_switching = %d\n", __func__,
pdata->is_750kHz_switching);
pr_info("%s : is_fixed_switching = %d\n", __func__,
pdata->is_fixed_switching);
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);
}
np = of_find_node_by_name(NULL, "battery");
if (!np) {
pr_err("%s np NULL\n", __func__);
} else {
ret = of_property_read_string(np,
"battery,charger_name", (char const **)&pdata->charger_name);
p = of_get_property(np, "battery,input_current_limit", &len);
if (!p)
return 1;
len = len / sizeof(u32);
pdata->charging_current_table = kzalloc(sizeof(sec_charging_current_t) * len,
GFP_KERNEL);
for (i = 0; i < len; i++) {
ret = of_property_read_u32_index(np,
"battery,input_current_limit", i,
&pdata->charging_current_table[i].input_current_limit);
ret = of_property_read_u32_index(np,
"battery,fast_charging_current", i,
&pdata->charging_current_table[i].fast_charging_current);
ret = of_property_read_u32_index(np,
"battery,full_check_current_1st", i,
&pdata->charging_current_table[i].full_check_current_1st);
ret = of_property_read_u32_index(np,
"battery,full_check_current_2nd", i,
&pdata->charging_current_table[i].full_check_current_2nd);
}
}
dev_info(dev, "s2mu003 charger parse dt retval = %d\n", ret);
return ret;
}
static struct of_device_id s2mu003_charger_match_table[] = {
{ .compatible = "samsung,s2mu003-charger",},
{},
};
#else
static int s2mu003_charger_parse_dt(struct device *dev,
struct s2mu003_charger_platform_data *pdata)
{
return -ENOSYS;
}
#define s2mu003_charger_match_table NULL
#endif /* CONFIG_OF */
static int s2mu003_charger_probe(struct platform_device *pdev)
{
s2mu003_mfd_chip_t *chip = dev_get_drvdata(pdev->dev.parent);
#ifndef CONFIG_OF
struct s2mu003_mfd_platform_data *mfd_pdata = dev_get_platdata(chip->dev);
#endif
struct s2mu003_charger_data *charger;
int ret = 0;
pr_info("%s:[BATT] S2MU003 Charger driver probe\n", __func__);
charger = kzalloc(sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
mutex_init(&charger->io_lock);
charger->s2mu003 = chip;
charger->client = chip->i2c_client;
#ifdef CONFIG_OF
charger->pdata = devm_kzalloc(&pdev->dev, sizeof(*(charger->pdata)),
GFP_KERNEL);
if (!charger->pdata) {
dev_err(&pdev->dev, "Failed to allocate memory\n");
ret = -ENOMEM;
goto err_parse_dt_nomem;
}
ret = s2mu003_charger_parse_dt(&pdev->dev, charger->pdata);
if (ret < 0)
goto err_parse_dt;
#else
charger->pdata = mfd_pdata->charger_platform_data;
#endif
platform_set_drvdata(pdev, charger);
if (charger->pdata->charger_name == NULL)
charger->pdata->charger_name = "sec-charger";
charger->psy_chg.name = charger->pdata->charger_name;
charger->psy_chg.type = POWER_SUPPLY_TYPE_UNKNOWN;
charger->psy_chg.get_property = sec_chg_get_property;
charger->psy_chg.set_property = sec_chg_set_property;
charger->psy_chg.properties = sec_charger_props;
charger->psy_chg.num_properties = ARRAY_SIZE(sec_charger_props);
charger->siop_level = 100;
s2mu003_chg_init(charger);
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;
}
ret = register_irq(pdev, charger);
if (ret < 0)
goto err_reg_irq;
s2mu003_test_read(charger->client);
pr_info("%s:[BATT] S2MU003 charger driver loaded OK\n", __func__);
return 0;
err_reg_irq:
power_supply_unregister(&charger->psy_chg);
err_power_supply_register:
err_parse_dt:
err_parse_dt_nomem:
mutex_destroy(&charger->io_lock);
kfree(charger);
return ret;
}
static int s2mu003_charger_remove(struct platform_device *pdev)
{
struct s2mu003_charger_data *charger =
platform_get_drvdata(pdev);
unregister_irq(pdev, charger);
power_supply_unregister(&charger->psy_chg);
mutex_destroy(&charger->io_lock);
kfree(charger);
return 0;
}
#if defined CONFIG_PM
static int s2mu003_charger_suspend(struct device *dev)
{
return 0;
}
static int s2mu003_charger_resume(struct device *dev)
{
return 0;
}
#else
#define s2mu003_charger_suspend NULL
#define s2mu003_charger_resume NULL
#endif
static void s2mu003_charger_shutdown(struct device *dev)
{
pr_info("%s: S2MU003 Charger driver shutdown\n", __func__);
}
static SIMPLE_DEV_PM_OPS(s2mu003_charger_pm_ops, s2mu003_charger_suspend,
s2mu003_charger_resume);
static struct platform_driver s2mu003_charger_driver = {
.driver = {
.name = "s2mu003-charger",
.owner = THIS_MODULE,
.of_match_table = s2mu003_charger_match_table,
.pm = &s2mu003_charger_pm_ops,
.shutdown = s2mu003_charger_shutdown,
},
.probe = s2mu003_charger_probe,
.remove = s2mu003_charger_remove,
};
static int __init s2mu003_charger_init(void)
{
int ret = 0;
ret = platform_driver_register(&s2mu003_charger_driver);
return ret;
}
subsys_initcall(s2mu003_charger_init);
static void __exit s2mu003_charger_exit(void)
{
platform_driver_unregister(&s2mu003_charger_driver);
}
module_exit(s2mu003_charger_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick Chang <patrick_chang@richtek.com");
MODULE_DESCRIPTION("Charger driver for S2MU003");
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