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kernel_samsung_a53x/drivers/power/supply/s2mu106_fuelgauge.c

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Import A536BXXU9EXDC
2024-06-15 21:02:09 +02:00
/*
* s2mu106_fuelgauge.c - S2MU106 Fuel Gauge Driver
*
* Copyright (C) 2018 Samsung Electronics, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#define SINGLE_BYTE 1
#define TABLE_SIZE 22
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/power/s2mu106_fuelgauge.h>
#include <linux/of_gpio.h>
#include <linux/platform_data/ntc_thermistor.h>
static enum power_supply_property s2mu106_fuelgauge_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static int s2mu106_get_vbat(struct s2mu106_fuelgauge_data *fuelgauge);
static int s2mu106_get_ocv(struct s2mu106_fuelgauge_data *fuelgauge);
static int s2mu106_get_current(struct s2mu106_fuelgauge_data *fuelgauge);
static int s2mu106_get_avgcurrent(struct s2mu106_fuelgauge_data *fuelgauge);
static int s2mu106_get_avgvbat(struct s2mu106_fuelgauge_data *fuelgauge);
static void fg_wake_lock(struct wakeup_source *ws)
{
__pm_stay_awake(ws);
}
static void fg_wake_unlock(struct wakeup_source *ws)
{
__pm_relax(ws);
}
static int fg_set_wake_lock(struct s2mu106_fuelgauge_data *fuelgauge)
{
struct wakeup_source *ws = NULL;
ws = wakeup_source_register(NULL, "fuel_alerted");
if (ws == NULL)
goto err;
fuelgauge->fuel_alert_ws = ws;
return 0;
err:
return -1;
}
static int s2mu106_read_reg_byte(struct i2c_client *client, int reg, void *data)
{
int ret = 0;
int cnt = 0;
ret = i2c_smbus_read_byte_data(client, reg);
if (ret < 0) {
while (ret < 0 && cnt < 5) {
ret = i2c_smbus_read_byte_data(client, reg);
cnt++;
dev_err(&client->dev,
"%s: I2C read Incorrect! reg:0x%x, data:0x%x, cnt:%d\n",
__func__, reg, *(u8 *)data, cnt);
}
if (cnt == 5)
dev_err(&client->dev,
"%s: I2C read Failed reg:0x%x, data:0x%x\n",
__func__, reg, *(u8 *)data);
}
*(u8 *)data = (u8)ret;
return ret;
}
static int s2mu106_write_and_verify_reg_byte(struct i2c_client *client, int reg, u8 data)
{
int ret, i = 0;
int i2c_corrupted_cnt = 0;
u8 temp = 0;
ret = i2c_smbus_write_byte_data(client, reg, data);
if (ret < 0) {
for (i = 0; i < 3; i++) {
ret = i2c_smbus_write_byte_data(client, reg, data);
if (ret >= 0)
break;
}
if (i >= 3)
dev_err(&client->dev, "%s: Error(%d)\n", __func__, ret);
}
/* Skip non-writable registers */
if ((reg == 0xee) || (reg == 0xef) || (reg == 0xf2) || (reg == 0xf3) ||
(reg == 0x0C) || (reg == 0x1e) || (reg == 0x1f) || (reg == 0x27)) {
return ret;
}
s2mu106_read_reg_byte(client, reg, &temp);
while ((temp != data) && (i2c_corrupted_cnt < 5)) {
dev_err(&client->dev,
"%s: I2C write Incorrect! REG: 0x%x Expected: 0x%x Real-Value: 0x%x\n",
__func__, reg, data, temp);
ret = i2c_smbus_write_byte_data(client, reg, data);
s2mu106_read_reg_byte(client, reg, &temp);
i2c_corrupted_cnt++;
}
if (i2c_corrupted_cnt == 5)
dev_err(&client->dev,
"%s: I2C write failed REG: 0x%x Expected: 0x%x\n",
__func__, reg, data);
return ret;
}
static int s2mu106_write_reg(struct i2c_client *client, int reg, u8 *buf)
{
#if IS_ENABLED(SINGLE_BYTE)
int ret = 0;
s2mu106_write_and_verify_reg_byte(client, reg, buf[0]);
s2mu106_write_and_verify_reg_byte(client, reg+1, buf[1]);
#else
int ret, i = 0;
ret = i2c_smbus_write_i2c_block_data(client, reg, 2, buf);
if (ret < 0) {
for (i = 0; i < 3; i++) {
ret = i2c_smbus_write_i2c_block_data(client, reg, 2, buf);
if (ret >= 0)
break;
}
if (i >= 3)
dev_err(&client->dev, "%s: Error(%d)\n", __func__, ret);
}
#endif
return ret;
}
static int s2mu106_read_reg(struct i2c_client *client, int reg, u8 *buf)
{
#if IS_ENABLED(SINGLE_BYTE)
int ret = 0;
u8 data1 = 0, data2 = 0;
s2mu106_read_reg_byte(client, reg, &data1);
s2mu106_read_reg_byte(client, reg+1, &data2);
buf[0] = data1;
buf[1] = data2;
#else
int ret = 0, i = 0;
ret = i2c_smbus_read_i2c_block_data(client, reg, 2, buf);
if (ret < 0) {
for (i = 0; i < 3; i++) {
ret = i2c_smbus_read_i2c_block_data(client, reg, 2, buf);
if (ret >= 0)
break;
}
if (i >= 3)
dev_err(&client->dev, "%s: Error(%d)\n", __func__, ret);
}
#endif
return ret;
}
static void s2mu106_fg_test_read(struct i2c_client *client)
{
static int reg_list[] = {
0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0E, 0x0F,
0x10, 0x11, 0x14, 0x1A, 0x1B, 0x1E, 0x1F, 0x24, 0x25, 0x26,
0x27, 0x28, 0x29, 0x40, 0x41, 0x43, 0x44, 0x45, 0x48, 0x49,
0x4A, 0x4B, 0x50, 0x51, 0x52, 0x53, 0x58, 0x59, 0x5A, 0x5B,
0x5C, 0x67
};
u8 data = 0;
char str[1016] = {0,};
int i = 0, reg_list_size = 0;
reg_list_size = ARRAY_SIZE(reg_list);
for (i = 0; i < reg_list_size; i++) {
s2mu106_read_reg_byte(client, reg_list[i], &data);
sprintf(str+strlen(str), "0x%02x:0x%02x, ", reg_list[i], data);
}
/* print buffer */
pr_info("[FG]%s: %s\n", __func__, str);
}
static void s2mu106_reset_fg(struct s2mu106_fuelgauge_data *fuelgauge)
{
int i;
u8 temp = 0;
mutex_lock(&fuelgauge->fg_lock);
/* step 0: [Surge test] initialize register of FG */
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x0E, fuelgauge->info.batcap[0]);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x0F, fuelgauge->info.batcap[1]);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x10, fuelgauge->info.batcap[2]);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x11, fuelgauge->info.batcap[3]);
/* After battery capacity update, set BATCAP_OCV_EN(0x0C[6]=1) */
s2mu106_read_reg_byte(fuelgauge->i2c, 0x0C, &temp);
temp |= 0x40;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x0C, temp);
for (i = 0x92; i <= 0xe9; i++)
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, i, fuelgauge->info.battery_table3[i - 0x92]);
for (i = 0xea; i <= 0xff; i++)
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, i, fuelgauge->info.battery_table4[i - 0xea]);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x14, 0x67);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x45, &temp);
temp &= 0xF0;
temp |= fuelgauge->info.accum[0];
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x45, temp);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x44, fuelgauge->info.accum[1]);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x4B, &temp);
temp &= 0x8F;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4B, temp);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4A, 0x10);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x40, 0x08);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x41, 0x04);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x5C, 0x1A);
/* Dumpdone. Re-calculate SOC */
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1E, 0x0F);
mdelay(300);
/* Update battery parameter version */
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_FG_ID, &temp);
temp &= 0xF0;
temp |= (fuelgauge->info.battery_param_ver & 0x0F);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_FG_ID, temp);
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_FG_ID, &temp);
pr_info("%s: S2MU106_REG_FG_ID = 0x%02x, data ver. = 0x%x\n", __func__,
temp, fuelgauge->info.battery_param_ver);
/* If it was voltage mode, recover it */
if (fuelgauge->mode == HIGH_SOC_VOLTAGE_MODE) {
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4A, 0xFF);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x4B, &temp);
temp |= 0x70;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4B, temp);
}
mutex_unlock(&fuelgauge->fg_lock);
pr_info("%s: Reset FG completed\n", __func__);
}
static int s2mu106_fix_rawsoc_reset_fg(struct s2mu106_fuelgauge_data *fuelgauge)
{
int ret = 0, ui_soc = 0, f_soc = 0;
u8 data;
struct power_supply *psy;
union power_supply_propval value;
psy = power_supply_get_by_name("battery");
if (!psy)
return -EINVAL;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CAPACITY, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
dev_info(&fuelgauge->i2c->dev, "%s: UI SOC = %d\n", __func__, value.intval);
ui_soc = value.intval;
f_soc = (ui_soc << 8) / 100;
if (f_soc > 0xFF)
f_soc = 0xFF;
f_soc |= 0x1;
data = (u8)f_soc;
/* Set rawsoc fix & enable */
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x29, data);
s2mu106_reset_fg(fuelgauge);
/* Disable rawsoc fix */
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x29, 0x00);
pr_info("%s: Finish\n", __func__);
return ret;
}
static void s2mu106_init_regs(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 temp = 0;
pr_info("%s: s2mu106 fuelgauge initialize\n", __func__);
/* Save register values for surge check */
s2mu106_read_reg_byte(fuelgauge->i2c, 0x53, &temp);
fuelgauge->reg_OTP_53 = temp;
s2mu106_read_reg_byte(fuelgauge->i2c, 0x52, &temp);
fuelgauge->reg_OTP_52 = temp;
/* Disable VM3_flag_EN */
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_VM, &temp);
temp = temp & 0xFB;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_VM, temp);
}
static void s2mu106_alert_init(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
/* VBAT Threshold setting: 3.55V */
data[0] = 0x00 & 0x0f;
/* SOC Threshold setting */
data[0] = data[0] | (fuelgauge->pdata->fuel_alert_soc << 4);
data[1] = 0x00;
s2mu106_write_reg(fuelgauge->i2c, S2MU106_REG_IRQ_LVL, data);
}
static int s2mu106_set_temperature(struct s2mu106_fuelgauge_data *fuelgauge,
int temperature)
{
/*
* s2mu106 include temperature sensor so,
* do not need to set temperature value.
*/
return temperature;
}
static int s2mu106_get_temperature(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u16 compliment;
int temperature = 0;
mutex_lock(&fuelgauge->fg_lock);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x18);
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_MONOUT, data) < 0)
goto err;
/* pr_info("%s temp data = 0x%x 0x%x\n", __func__, data[0], data[1]); */
mutex_unlock(&fuelgauge->fg_lock);
compliment = (data[1] << 8) | (data[0]);
/* data[] store 2's compliment format number */
if (compliment & (0x1 << 15)) {
/* Negative */
temperature = -1 * ((~compliment & 0xFFFF) + 1);
} else {
temperature = compliment & 0x7FFF;
}
temperature = ((temperature * 100) >> 8)/10;
pr_info("%s: temperature (%d)\n", __func__, temperature);
temperature = 250;
return temperature;
err:
mutex_unlock(&fuelgauge->fg_lock);
return -ERANGE;
}
#if IS_ENABLED(TEMP_COMPEN)
static bool s2mu106_get_vm_status(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data = 0;
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_STATUS, &data);
return (data & (1 << 6)) ? true : false;
}
static int s2mu106_get_comp_socr(int temperature, int avg_curr)
{
int comp_socr = 0;
int t_socr = 0;
int i_socr = (-222) * avg_curr;
if (temperature <= -10)
t_socr = ((-223) * temperature + 6500) / 1000;
else if (temperature <= 200)
t_socr = ((-30) * temperature + 6500) / 1000;
comp_socr = ((t_socr + 1) * i_socr) / 100000;
comp_socr = comp_socr - (comp_socr % 5);
if (comp_socr > 80)
comp_socr = 80;
else if (comp_socr < 0)
comp_socr = 0;
pr_info("%s: SOCr = %d, T_SOCr = %d, I_SOCr = %d\n", __func__,
comp_socr, t_socr, i_socr / 100000);
return comp_socr;
}
static int s2mu106_get_soc_map(struct s2mu106_fuelgauge_data *fuelgauge,
bool bat_charging, int comp_socr)
{
int soc_map = 0;
if (bat_charging) {
if (fuelgauge->soc0i >= 9950)
soc_map = 10000;
else
soc_map =
((10040 - fuelgauge->socni) * (fuelgauge->rsoc - fuelgauge->soc0i)) /
(10000 - fuelgauge->soc0i) + fuelgauge->socni;
} else {
if (fuelgauge->soc0i < ((100 * comp_socr) + 50))
soc_map = 0;
else
soc_map =
(fuelgauge->socni * (fuelgauge->rsoc - fuelgauge->soc0i)) /
(fuelgauge->soc0i - (100 * comp_socr)) + fuelgauge->socni;
}
if (soc_map > 10000)
soc_map = 10000;
else if (soc_map < 0)
soc_map = 0;
return soc_map;
}
static void s2mu106_temperature_compensation(struct s2mu106_fuelgauge_data *fuelgauge)
{
bool flag_mapping = false;
int soc_map = 0;
s16 diff_soc = 0;
u8 data[2];
fuelgauge->comp_socr =
s2mu106_get_comp_socr(fuelgauge->temperature, fuelgauge->avg_curr);
if (fuelgauge->init_start) {
flag_mapping = true;
fuelgauge->pre_comp_socr = fuelgauge->comp_socr;
fuelgauge->pre_vm_status = fuelgauge->vm_status;
}
if ((fuelgauge->pre_comp_socr != fuelgauge->comp_socr) ||
(fuelgauge->pre_bat_charging != fuelgauge->bat_charging) ||
(fuelgauge->pre_vm_status != fuelgauge->vm_status) ||
(fuelgauge->pre_is_charging != fuelgauge->is_charging))
flag_mapping = true;
if (flag_mapping == true) {
if (fuelgauge->init_start) {
s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_RSOC_R, data);
if (data[1] & 0x80) {
if (data[1] & 0x40)
data[1] = data[1] | 0x80;
else
data[1] = data[1] & 0x7F;
diff_soc = (data[1] << 8) | data[0];
pr_info("%s: init, use saved diff_soc(%d) data[1] = 0x%02x, data[0] = 0x%02x\n",
__func__, diff_soc, data[1], data[0]);
fuelgauge->soc_r = fuelgauge->rsoc + diff_soc;
if (fuelgauge->soc_r > 10000)
fuelgauge->soc_r = 10000;
else if (fuelgauge->soc_r < 0)
fuelgauge->soc_r = 0;
fuelgauge->socni = fuelgauge->soc_r;
fuelgauge->soc0i = fuelgauge->rsoc;
} else {
pr_info("%s: init, diff_soc is not saved\n", __func__);
fuelgauge->socni = fuelgauge->rsoc;
fuelgauge->soc0i = fuelgauge->rsoc;
}
} else {
/* After mapping, SOC_R is maintained.
* If mapping occurs continuously, SOC is not changed.
* So SOC_R need to be updated before mapping.
*/
fuelgauge->soc_r = s2mu106_get_soc_map(fuelgauge,
fuelgauge->pre_bat_charging, fuelgauge->pre_comp_socr);
fuelgauge->socni = fuelgauge->soc_r;
fuelgauge->soc0i = fuelgauge->rsoc;
}
}
soc_map = s2mu106_get_soc_map(fuelgauge,
fuelgauge->bat_charging, fuelgauge->comp_socr);
#if !IS_ENABLED(INC_OK_EN)
/* Use is_charging flag for prevent SOC increase when not charging */
if ((fuelgauge->is_charging == false) && (soc_map > fuelgauge->soc_r)) {
if (fuelgauge->init_start)
fuelgauge->soc_r = soc_map;
else
pr_info("%s: Not charging, do not reflect SOC increase. soc_map = %d, soc_r = %d\n",
__func__, soc_map, fuelgauge->soc_r);
} else
fuelgauge->soc_r = soc_map;
#else
fuelgauge->soc_r = soc_map;
#endif
if (fuelgauge->vm_status && (fuelgauge->soc_r > fuelgauge->rsoc) &&
(fuelgauge->temperature <= fuelgauge->low_temp_limit))
fuelgauge->soc_r = fuelgauge->rsoc;
#if !IS_ENABLED(BATCAP_LEARN)
pr_info("%s: SOC_M = %d, Chg_stat = %d, VM = %d, flag_mapping = %d, avgCURR = %d\n", __func__,
fuelgauge->rsoc, fuelgauge->bat_charging, fuelgauge->vm_status, flag_mapping, fuelgauge->avg_curr);
pr_info("%s: avgTEMP = %d, SOCni = %d, SOC0i = %d, SOCr = %d, SOC_R = %d\n", __func__,
fuelgauge->temperature, fuelgauge->socni, fuelgauge->soc0i, fuelgauge->comp_socr, fuelgauge->soc_r);
#endif
fuelgauge->init_start = 0;
fuelgauge->pre_comp_socr = fuelgauge->comp_socr;
fuelgauge->pre_vm_status = fuelgauge->vm_status;
fuelgauge->pre_is_charging = fuelgauge->is_charging;
fuelgauge->pre_bat_charging = fuelgauge->bat_charging;
/* Save diff_soc for maintain SOC, after reboot */
diff_soc = fuelgauge->soc_r - fuelgauge->rsoc;
if (diff_soc > 10000)
diff_soc = 10000;
else if (diff_soc < -10000)
diff_soc = -10000;
data[1] = ((diff_soc & 0xFF00) >> 8) & 0xFF;
data[1] = data[1] | 0x80;
data[0] = diff_soc & 0xFF;
s2mu106_write_reg(fuelgauge->i2c, S2MU106_REG_RSOC_R, data);
/* TODO: Print diff_soc & saved value for debugging */
s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_RSOC_R, data);
if (data[1] & 0x40)
data[1] = data[1] | 0x80;
else
data[1] = data[1] & 0x7F;
diff_soc = (data[1] << 8) | data[0];
pr_info("%s: diff_soc = %d, data[1] = 0x%02x, data[0] = 0x%02x\n", __func__, diff_soc, data[1], data[0]);
}
#endif
#if IS_ENABLED(BATCAP_LEARN)
static int s2mu106_get_batcap_ocv(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u32 batcap_ocv = 0;
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_RBATCAP, data) < 0)
return -EINVAL;
dev_dbg(&fuelgauge->i2c->dev, "%s: data0 (%d) data1 (%d)\n", __func__, data[0], data[1]);
batcap_ocv = (data[0] + (data[1] << 8)) >> 2;
return batcap_ocv;
}
static int s2mu106_get_cycle(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u16 compliment, cycle;
mutex_lock(&fuelgauge->fg_lock);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x27);
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_MONOUT, data) < 0)
goto err;
compliment = (data[1] << 8) | (data[0]);
cycle = compliment;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x10);
mutex_unlock(&fuelgauge->fg_lock);
return cycle;
err:
mutex_unlock(&fuelgauge->fg_lock);
return -EINVAL;
}
void s2mu106_batcap_learning(struct s2mu106_fuelgauge_data *fuelgauge)
{
int bat_w = 0;
u8 data[2] = {0, }, temp = 0;
int range = (BAT_L_CON[5] == 0) ? 900:800;
int gap_cap = 0;
gap_cap = (fuelgauge->capcc * 1000) / fuelgauge->batcap_ocv;
if ((gap_cap > range) && (gap_cap < 1100)) {
if (BAT_L_CON[6])
bat_w = ((fuelgauge->batcap_ocv * 75) + (fuelgauge->capcc * 25)) / 100;
else
bat_w = ((fuelgauge->batcap_ocv * 90) + (fuelgauge->capcc * 10)) / 100;
if (BAT_L_CON[7]) {
fuelgauge->batcap_ocv_fin = bat_w;
bat_w = bat_w << 2;
data[1] = (u8)((bat_w >> 8) & 0x00ff);
data[0] = (u8)(bat_w & 0x00ff);
mutex_lock(&fuelgauge->fg_lock);
s2mu106_write_reg(fuelgauge->i2c, S2MU106_REG_RBATCAP, data);
/* After battery capacity update, set BATCAP_OCV_EN(0x0C[6]=1) */
s2mu106_read_reg_byte(fuelgauge->i2c, 0x0C, &temp);
temp |= 0x40;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x0C, temp);
mutex_unlock(&fuelgauge->fg_lock);
}
}
pr_info("%s: gap_cap = %d, capcc = %d, batcap_ocv = %d, bat_w = %d\n",
__func__, gap_cap, fuelgauge->capcc, fuelgauge->batcap_ocv, bat_w);
}
static int s2mu106_get_cap_cc(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data1 = 0, data0 = 0;
int cap_cc = 0;
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_CAPCC + 1, &data1);
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_CAPCC, &data0);
cap_cc = (data1 << 8) | data0;
if (cap_cc & (1 << 15)) {
cap_cc = (~cap_cc) + 1;
cap_cc = cap_cc / 2;
cap_cc = cap_cc * (-1);
} else
cap_cc /= 2;
return cap_cc;
}
static int s2mu106_get_soh(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data1 = 0, data0 = 0;
int original = 0, ret = -1;
int batcap_ocv = s2mu106_get_batcap_ocv(fuelgauge);
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_BATCAP + 1, &data1);
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_BATCAP, &data0);
original = (data1 << 8) | data0;
if (original != 0) {
ret = (batcap_ocv * 100) / original;
if (ret > 100)
ret = 100;
} else
ret = 100;
pr_info("%s: original batcap = %d, new_batcap = %d, soh = %d\n", __func__, original, batcap_ocv, ret);
return ret;
}
#endif
#if IS_ENABLED(BATCAP_LEARN) || IS_ENABLED(TEMP_COMPEN)
static bool s2mu106_get_bat_charging(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data = 0;
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_STATUS, &data);
return (data & (1 << 5)) ? true : false;
}
#endif
#if IS_ENABLED(BATCAP_LEARN) && IS_ENABLED(TEMP_COMPEN)
static int s2mu106_get_fullcharge_cap(struct s2mu106_fuelgauge_data *fuelgauge)
{
int ret = -1;
int batcap_ocv = s2mu106_get_batcap_ocv(fuelgauge);
ret = ((100 - fuelgauge->comp_socr) * batcap_ocv) / 100;
return ret;
}
static int s2mu106_get_remaining_cap(struct s2mu106_fuelgauge_data *fuelgauge)
{
int ret = -1;
int fcc = s2mu106_get_fullcharge_cap(fuelgauge);
ret = (fuelgauge->soc_r) * fcc / 10000;
pr_info("%s: fcc = %d, remaining_cap = %d\n", __func__, fcc, ret);
return ret;
}
#endif
static int s2mu106_get_rawsoc(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2], temp;
u16 compliment;
u8 por_state = 0;
u8 reg_1E = 0;
u8 reg_OTP_52 = 0, reg_OTP_53 = 0;
#if IS_ENABLED(CONFIG_CHARGER_S2MU106)
bool charging_enabled = false;
#endif
int ret = 0;
struct power_supply *psy;
union power_supply_propval value;
int float_voltage = 0;
int avg_current = 0, avg_vbat = 0, vbat = 0, curr = 0;
u8 fg_mode_reg = 0;
#if IS_ENABLED(BATCAP_LEARN)
int BATCAP_L_VBAT;
#endif
enum power_supply_property psp;
psy = power_supply_get_by_name("battery");
if (!psy)
return -EINVAL;
/* Get UI SOC from battery driver */
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CAPACITY, &value);
if (ret < 0) {
pr_err("%s: Fail to execute property.\n", __func__);
value.intval = 0;
}
fuelgauge->ui_soc = value.intval;
s2mu106_read_reg_byte(fuelgauge->i2c, 0x1F, &por_state);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x53, &reg_OTP_53);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x52, &reg_OTP_52);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x1E, &reg_1E);
dev_err(&fuelgauge->i2c->dev,
"%s: OTP 52(%02x) 53(%02x), current 52(%02x) 53(%02x), 0x1F(%02x), 0x1E(%02x)\n",
__func__, fuelgauge->reg_OTP_52, fuelgauge->reg_OTP_53, reg_OTP_52, reg_OTP_53, por_state, reg_1E);
if (((por_state != 0x00) || (reg_1E != 0x03)) || (fuelgauge->probe_done == true &&
(fuelgauge->reg_OTP_52 != reg_OTP_52 || fuelgauge->reg_OTP_53 != reg_OTP_53))) {
/* check charging enable */
#if IS_ENABLED(CONFIG_CHARGER_S2MU106)
psy = power_supply_get_by_name("s2mu106-charger");
if (!psy)
return -EINVAL;
psp = (enum power_supply_property)POWER_SUPPLY_S2M_PROP_CHARGING_ENABLED;
ret = power_supply_get_property(psy, psp, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
charging_enabled = value.intval;
value.intval = S2M_BAT_CHG_MODE_CHARGING_OFF;
psy = power_supply_get_by_name("s2mu106-charger");
if (!psy)
return -EINVAL;
psp = (enum power_supply_property)POWER_SUPPLY_S2M_PROP_CHARGING_ENABLED;
ret = power_supply_set_property(psy, psp, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
#endif
if (fuelgauge->reg_OTP_52 != reg_OTP_52 || fuelgauge->reg_OTP_53 != reg_OTP_53) {
#if IS_ENABLED(CONFIG_CHARGER_S2MU106)
psy = power_supply_get_by_name("s2mu106-charger");
if (!psy)
return -EINVAL;
psp = (enum power_supply_property)POWER_SUPPLY_S2M_PROP_FUELGAUGE_RESET;
ret = power_supply_set_property(psy, psp, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
#endif
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1F, 0x40);
msleep(50);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1F, 0x01);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x53, &reg_OTP_53);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x52, &reg_OTP_52);
dev_err(&fuelgauge->i2c->dev,
"1st reset after %s: OTP 52(%02x) 53(%02x) current 52(%02x) 53(%02x)\n", __func__,
fuelgauge->reg_OTP_52, fuelgauge->reg_OTP_53, reg_OTP_52, reg_OTP_53);
if (fuelgauge->reg_OTP_52 != reg_OTP_52 || fuelgauge->reg_OTP_53 != reg_OTP_53) {
#if IS_ENABLED(CONFIG_CHARGER_S2MU106)
psy = power_supply_get_by_name("s2mu106-charger");
if (!psy)
return -EINVAL;
psp = (enum power_supply_property)POWER_SUPPLY_S2M_PROP_FUELGAUGE_RESET;
ret = power_supply_set_property(psy, psp, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
#endif
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1F, 0x40);
msleep(50);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1F, 0x01);
dev_err(&fuelgauge->i2c->dev, "%s: 2nd reset\n", __func__);
}
}
dev_info(&fuelgauge->i2c->dev, "%s: FG reset\n", __func__);
if (fuelgauge->ui_soc == 0)
s2mu106_reset_fg(fuelgauge);
else
s2mu106_fix_rawsoc_reset_fg(fuelgauge);
por_state = 0x00;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1F, por_state);
#if IS_ENABLED(CONFIG_CHARGER_S2MU106)
/* Recover charger status after f.g reset */
if (charging_enabled) {
value.intval = S2M_BAT_CHG_MODE_CHARGING;
psy = power_supply_get_by_name("s2mu106-charger");
if (!psy)
return -EINVAL;
psp = (enum power_supply_property)POWER_SUPPLY_S2M_PROP_CHARGING_ENABLED;
ret = power_supply_set_property(psy, psp, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
}
#endif
}
mutex_lock(&fuelgauge->fg_lock);
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_RSOC, data) < 0)
goto err;
mutex_unlock(&fuelgauge->fg_lock);
compliment = (data[1] << 8) | (data[0]);
/* data[] store 2's compliment format number */
if (compliment & (0x1 << 15)) {
/* Negative */
fuelgauge->rsoc = ((~compliment) & 0xFFFF) + 1;
fuelgauge->rsoc = (fuelgauge->rsoc * (-10000)) / (0x1 << 14);
} else {
fuelgauge->rsoc = compliment & 0x7FFF;
fuelgauge->rsoc = ((fuelgauge->rsoc * 10000) / (0x1 << 14));
}
avg_current = s2mu106_get_avgcurrent(fuelgauge);
avg_vbat = s2mu106_get_avgvbat(fuelgauge);
vbat = s2mu106_get_vbat(fuelgauge);
curr = s2mu106_get_current(fuelgauge);
#if IS_ENABLED(USE_EXTERNAL_TEMP)
/* If you want to use temperature sensed by other IC,
* change the battery driver so that F.G driver can
* get the value.
*/
psy = power_supply_get_by_name("battery");
if (!psy)
return -EINVAL;
/* Get temperature from battery driver */
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
fuelgauge->temperature = value.intval;
#else
fuelgauge->temperature = s2mu106_get_temperature(fuelgauge);
#endif
#if IS_ENABLED(BATCAP_LEARN) || IS_ENABLED(TEMP_COMPEN)
fuelgauge->bat_charging = s2mu106_get_bat_charging(fuelgauge);
#endif
#if IS_ENABLED(TEMP_COMPEN)
fuelgauge->vm_status = s2mu106_get_vm_status(fuelgauge);
fuelgauge->avg_curr = avg_current;
s2mu106_temperature_compensation(fuelgauge);
dev_info(&fuelgauge->i2c->dev,
"%s: current_soc (%d), compen_soc (%d), previous_soc (%d), FG_mode(%s)\n", __func__,
fuelgauge->rsoc, fuelgauge->soc_r, fuelgauge->info.soc, mode_to_str[fuelgauge->mode]);
fuelgauge->info.soc = fuelgauge->soc_r;
#else
dev_info(&fuelgauge->i2c->dev,
"%s: current_soc (%d), previous_soc (%d), FG_mode(%s)\n", __func__,
fuelgauge->rsoc, fuelgauge->info.soc, mode_to_str[fuelgauge->mode]);
fuelgauge->info.soc = fuelgauge->rsoc;
#endif
#if IS_ENABLED(CONFIG_CHARGER_S2MU106)
psy = power_supply_get_by_name("s2mu106-charger");
if (!psy)
return -EINVAL;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_MAX, &value);
if (ret < 0)
pr_err("%s: Fail to execute property\n", __func__);
float_voltage = value.intval;
#else
float_voltage = 4350;
#endif
float_voltage = (float_voltage * 996) / 1000;
s2mu106_read_reg_byte(fuelgauge->i2c, 0x4A, &fg_mode_reg);
dev_info(&fuelgauge->i2c->dev,
"%s: UI SOC=%d, is_charging=%d, avg_vbat=%d, float_voltage=%d, avg_current=%d, 0x4A=0x%02x\n", __func__,
fuelgauge->ui_soc, fuelgauge->is_charging, avg_vbat, float_voltage, avg_current, fg_mode_reg);
if ((fuelgauge->is_charging == true) &&
((fuelgauge->ui_soc >= 98) || ((avg_vbat > float_voltage) && (avg_current < 500)))) {
if (fuelgauge->mode == CURRENT_MODE) { /* switch to VOLTAGE_MODE */
fuelgauge->mode = HIGH_SOC_VOLTAGE_MODE;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4A, 0xFF);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x4B, &temp);
temp |= 0x70;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4B, temp);
dev_info(&fuelgauge->i2c->dev, "%s: FG is in high soc voltage mode\n", __func__);
}
} else if ((avg_current < -50) || (avg_current >= 550)) {
if (fuelgauge->mode == HIGH_SOC_VOLTAGE_MODE) {
fuelgauge->mode = CURRENT_MODE;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4A, 0x10);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x4B, &temp);
temp &= 0x8F;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x4B, temp);
dev_info(&fuelgauge->i2c->dev, "%s: FG is in current mode\n", __func__);
}
}
#if IS_ENABLED(BATCAP_LEARN)
fuelgauge->capcc = s2mu106_get_cap_cc(fuelgauge);
fuelgauge->batcap_ocv = s2mu106_get_batcap_ocv(fuelgauge); // CC mode capacity
fuelgauge->cycle = s2mu106_get_cycle(fuelgauge);
BATCAP_L_VBAT = (BAT_L_CON[1] == 0) ? 4200:4100;
if (fuelgauge->temperature >= 200) {
if (fuelgauge->learn_start == false) {
if ((fuelgauge->rsoc < 1000) && (fuelgauge->cycle >= BAT_L_CON[0]))
fuelgauge->learn_start = true;
} else {
if ((fuelgauge->cond1_ok == false) && (fuelgauge->bat_charging == false))
goto batcap_learn_init;
if (fuelgauge->cond1_ok == false) {
if (fuelgauge->c1_count >= BAT_L_CON[2]) {
fuelgauge->cond1_ok = true;
fuelgauge->c1_count = 0;
} else {
if ((vbat >= BATCAP_L_VBAT) &&
(avg_current < BAT_L_CON[4]) && (fuelgauge->rsoc >= 9700)) {
fuelgauge->c1_count++;
} else
fuelgauge->c1_count = 0;
}
} else {
if (fuelgauge->c2_count >= BAT_L_CON[3]) {
s2mu106_batcap_learning(fuelgauge);
goto batcap_learn_init;
} else {
if ((vbat >= (BATCAP_L_VBAT - 100)) && (avg_current > -30) &&
(avg_current < 30) && (fuelgauge->rsoc >= 9800)) {
fuelgauge->c2_count++;
} else if (avg_current <= -30) {
fuelgauge->c2_count = 0;
goto batcap_learn_init;
} else
fuelgauge->c2_count = 0;
}
}
}
} else {
batcap_learn_init:
fuelgauge->learn_start = false;
fuelgauge->cond1_ok = false;
fuelgauge->c1_count = 0;
fuelgauge->c2_count = 0;
}
#endif
#if IS_ENABLED(TEMP_COMPEN) && IS_ENABLED(BATCAP_LEARN)
fuelgauge->soh = s2mu106_get_soh(fuelgauge);
fuelgauge->capcc = s2mu106_get_cap_cc(fuelgauge);
fuelgauge->fcc = s2mu106_get_fullcharge_cap(fuelgauge);
fuelgauge->rmc = s2mu106_get_remaining_cap(fuelgauge);
pr_info("%s: SOC_M = %d, Chg_stat = %d, VM = %d, avbVBAT = %d, avgCURR = %d\n", __func__,
fuelgauge->rsoc, fuelgauge->bat_charging, fuelgauge->vm_status, avg_vbat, avg_current);
pr_info("%s: avgTEMP = %d, SOCni = %d, SOC0i = %d, SOCr = %d, SOC_R = %d\n", __func__,
fuelgauge->temperature, fuelgauge->socni, fuelgauge->soc0i, fuelgauge->comp_socr, fuelgauge->soc_r);
pr_info("%s: Learning_start = %d, C1_count = %d/%d, C2_count = %d/%d\n", __func__,
fuelgauge->learn_start, fuelgauge->c1_count, BAT_L_CON[2], fuelgauge->c2_count, BAT_L_CON[3]);
pr_info("%s: BATCAP_OCV_new = %d, SOH = %d, CAP_CC = %d, FCC = %d, RM = %d\n", __func__,
fuelgauge->batcap_ocv_fin, fuelgauge->soh, fuelgauge->capcc, fuelgauge->fcc, fuelgauge->rmc);
#endif
/* Low voltage W/A, make 0% */
if ((avg_vbat < 3400) && (avg_current < -50) && (fuelgauge->rsoc > 100)) {
if (fuelgauge->temperature > fuelgauge->low_temp_limit) {
dev_info(&fuelgauge->i2c->dev, "%s: Low voltage WA. Make rawsoc 0\n", __func__);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x25, &temp);
temp &= 0xF0;
temp |= 0x04;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x25, temp);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x24, 0x01);
/* Dumpdone. Re-calculate SOC */
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x1E, 0x0F);
mdelay(300);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x24, 0x00);
/* Make report SOC 0% */
fuelgauge->info.soc = 0;
#if IS_ENABLED(TEMP_COMPEN)
fuelgauge->soc_r = 0;
#endif
} else {
dev_info(&fuelgauge->i2c->dev, "%s: Low voltage WA. Make UI SOC 0\n", __func__);
/* Make report SOC 0% */
fuelgauge->info.soc = 0;
#if IS_ENABLED(TEMP_COMPEN)
fuelgauge->soc_r = 0;
#endif
}
}
#if IS_ENABLED(TEMP_COMPEN)
/* Maintain UI SOC if battery is relaxing */
if (((fuelgauge->temperature < fuelgauge->low_temp_limit) &&
(fuelgauge->soc_r == 0) && (fuelgauge->rsoc > 500)) &&
(((avg_current > -60) && (avg_current < 50)) || ((curr > -100) && (curr < 50)))) {
fuelgauge->soc_r = fuelgauge->ui_soc * 100;
fuelgauge->info.soc = fuelgauge->soc_r;
fuelgauge->init_start = 1;
dev_info(&fuelgauge->i2c->dev,
"%s: Maintain UI SOC if battery is relaxing SOC_R = %d, info.soc = %d\n",
__func__, fuelgauge->soc_r, fuelgauge->info.soc);
}
#endif
/* S2MU106 FG debug */
s2mu106_fg_test_read(fuelgauge->i2c);
return min(fuelgauge->info.soc, 10000);
err:
mutex_unlock(&fuelgauge->fg_lock);
return -EINVAL;
}
static int s2mu106_get_current(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u16 compliment;
int curr = 0;
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_RCUR_CC, data) < 0)
return -EINVAL;
compliment = (data[1] << 8) | (data[0]);
dev_dbg(&fuelgauge->i2c->dev, "%s: rCUR_CC(0x%4x)\n", __func__, compliment);
if (compliment & (0x1 << 15)) { /* Charging */
curr = ((~compliment) & 0xFFFF) + 1;
curr = (curr * 1000) >> 12;
} else { /* dischaging */
curr = compliment & 0x7FFF;
curr = (curr * (-1000)) >> 12;
}
dev_info(&fuelgauge->i2c->dev, "%s: current (%d)mA\n", __func__, curr);
return curr;
}
static int s2mu106_get_ocv(struct s2mu106_fuelgauge_data *fuelgauge)
{
/* 22 values of mapping table for EVT1*/
int *soc_arr;
int *ocv_arr;
int soc = fuelgauge->info.soc;
int ocv = 0;
int high_index = TABLE_SIZE - 1;
int low_index = 0;
int mid_index = 0;
soc_arr = fuelgauge->info.soc_arr_val;
ocv_arr = fuelgauge->info.ocv_arr_val;
dev_err(&fuelgauge->i2c->dev,
"%s: soc (%d) soc_arr[TABLE_SIZE-1] (%d) ocv_arr[TABLE_SIZE-1) (%d)\n",
__func__, soc, soc_arr[TABLE_SIZE-1], ocv_arr[TABLE_SIZE-1]);
if (soc <= soc_arr[TABLE_SIZE - 1]) {
ocv = ocv_arr[TABLE_SIZE - 1];
goto ocv_soc_mapping;
} else if (soc >= soc_arr[0]) {
ocv = ocv_arr[0];
goto ocv_soc_mapping;
}
while (low_index <= high_index) {
mid_index = (low_index + high_index) >> 1;
if (soc_arr[mid_index] > soc)
low_index = mid_index + 1;
else if (soc_arr[mid_index] < soc)
high_index = mid_index - 1;
else {
ocv = ocv_arr[mid_index];
goto ocv_soc_mapping;
}
}
if ((high_index >= 0 && high_index < TABLE_SIZE) && (low_index >= 0 && low_index < TABLE_SIZE)) {
ocv = ocv_arr[high_index];
ocv += ((ocv_arr[low_index] - ocv_arr[high_index]) *
(soc - soc_arr[high_index])) /
(soc_arr[low_index] - soc_arr[high_index]);
}
ocv_soc_mapping:
dev_info(&fuelgauge->i2c->dev, "%s: soc (%d), ocv (%d)\n", __func__, soc, ocv);
return ocv;
}
static int s2mu106_get_avgcurrent(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u16 compliment;
int curr = 0;
mutex_lock(&fuelgauge->fg_lock);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x17);
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_MONOUT, data) < 0)
goto err;
compliment = (data[1] << 8) | (data[0]);
dev_dbg(&fuelgauge->i2c->dev, "%s: MONOUT(0x%4x)\n", __func__, compliment);
if (compliment & (0x1 << 15)) { /* Charging */
curr = ((~compliment) & 0xFFFF) + 1;
curr = (curr * 1000) >> 12;
} else { /* dischaging */
curr = compliment & 0x7FFF;
curr = (curr * (-1000)) >> 12;
}
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x10);
mutex_unlock(&fuelgauge->fg_lock);
dev_info(&fuelgauge->i2c->dev, "%s: avg current (%d)mA\n", __func__, curr);
return curr;
err:
mutex_unlock(&fuelgauge->fg_lock);
return -EINVAL;
}
static int s2mu106_get_vbat(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u32 vbat = 0;
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_RVBAT, data) < 0)
return -EINVAL;
dev_dbg(&fuelgauge->i2c->dev, "%s: data0 (%d) data1 (%d)\n", __func__, data[0], data[1]);
vbat = ((data[0] + (data[1] << 8)) * 1000) >> 13;
dev_info(&fuelgauge->i2c->dev, "%s: vbat (%d)\n", __func__, vbat);
return vbat;
}
static int s2mu106_get_avgvbat(struct s2mu106_fuelgauge_data *fuelgauge)
{
u8 data[2];
u16 compliment, avg_vbat;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, 0x40, 0x08);
mutex_lock(&fuelgauge->fg_lock);
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x16);
if (s2mu106_read_reg(fuelgauge->i2c, S2MU106_REG_MONOUT, data) < 0)
goto err;
compliment = (data[1] << 8) | (data[0]);
avg_vbat = (compliment * 1000) >> 12;
s2mu106_write_and_verify_reg_byte(fuelgauge->i2c, S2MU106_REG_MONOUT_SEL, 0x10);
mutex_unlock(&fuelgauge->fg_lock);
dev_info(&fuelgauge->i2c->dev, "%s: avgvbat (%d)\n", __func__, avg_vbat);
return avg_vbat;
err:
mutex_unlock(&fuelgauge->fg_lock);
return -EINVAL;
}
bool s2mu106_fuelgauge_fuelalert_init(struct i2c_client *client, int soc)
{
struct s2mu106_fuelgauge_data *fuelgauge = i2c_get_clientdata(client);
u8 data[2];
fuelgauge->is_fuel_alerted = false;
/* 1. Set s2mu106 alert configuration. */
s2mu106_alert_init(fuelgauge);
if (s2mu106_read_reg(client, S2MU106_REG_IRQ, data) < 0)
return -1;
/*Enable VBAT, SOC */
data[1] &= 0xfc;
/*Disable IDLE_ST, INIT)ST */
data[1] |= 0x0c;
s2mu106_write_reg(client, S2MU106_REG_IRQ, data);
dev_dbg(&client->dev, "%s: irq_reg(%02x%02x) irq(%d)\n", __func__, data[1], data[0], fuelgauge->pdata->fg_irq);
return true;
}
static int s2mu106_fg_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct s2mu106_fuelgauge_data *fuelgauge = power_supply_get_drvdata(psy);
enum s2m_power_supply_property s2m_psp = (enum s2m_power_supply_property) psp;
switch ((int)psp) {
case POWER_SUPPLY_PROP_STATUS:
return -ENODATA;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
/* Remaining capacity unit is uAh */
val->intval = fuelgauge->rmc * 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = fuelgauge->fcc;
break;
case POWER_SUPPLY_PROP_ENERGY_NOW:
break;
/* Cell voltage (VCELL, mV) */
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = s2mu106_get_vbat(fuelgauge);
break;
/* Additional Voltage Information (mV) */
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
switch (val->intval) {
case S2M_BATTERY_VOLTAGE_AVERAGE:
val->intval = s2mu106_get_avgvbat(fuelgauge);
break;
case S2M_BATTERY_VOLTAGE_OCV:
val->intval = s2mu106_get_ocv(fuelgauge);
break;
}
break;
/* Current (mA) */
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (val->intval == S2M_BATTERY_CURRENT_UA)
val->intval = s2mu106_get_current(fuelgauge) * 1000;
else
val->intval = s2mu106_get_current(fuelgauge);
break;
/* Average Current (mA) */
case POWER_SUPPLY_PROP_CURRENT_AVG:
if (val->intval == S2M_BATTERY_CURRENT_UA)
val->intval = s2mu106_get_avgcurrent(fuelgauge) * 1000;
else
val->intval = s2mu106_get_avgcurrent(fuelgauge);
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = s2mu106_get_rawsoc(fuelgauge) / 10;
/* capacity should be between 0% and 100%
* (0.1% degree)
*/
if (val->intval > 1000)
val->intval = 1000;
if (val->intval < 0)
val->intval = 0;
/* check whether doing the wake_unlock */
if (((val->intval / 10) > fuelgauge->pdata->fuel_alert_soc) && fuelgauge->is_fuel_alerted) {
fg_wake_unlock(fuelgauge->fuel_alert_ws);
s2mu106_fuelgauge_fuelalert_init(fuelgauge->i2c, fuelgauge->pdata->fuel_alert_soc);
}
break;
/* Battery Temperature */
case POWER_SUPPLY_PROP_TEMP:
val->intval = s2mu106_get_temperature(fuelgauge);
break;
/* Target Temperature */
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
val->intval = s2mu106_get_temperature(fuelgauge);
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = fuelgauge->mode;
break;
case POWER_SUPPLY_PROP_ONLINE:
pr_info("[DEBUG]%s: POWER_SUPPLY_PROP_ONLINE\n", __func__);
return 1;
case POWER_SUPPLY_S2M_PROP_MIN ... POWER_SUPPLY_S2M_PROP_MAX:
switch (s2m_psp) {
case POWER_SUPPLY_S2M_PROP_CHARGE_TEMP:
val->intval = s2mu106_get_temperature(fuelgauge);
break;
case POWER_SUPPLY_S2M_PROP_SOH:
#if IS_ENABLED(BATCAP_LEARN)
fuelgauge->soh = s2mu106_get_soh(fuelgauge);
val->intval = fuelgauge->soh;
#else
/* If battery capacity learning is not enabled,
* return SOH is 100%
*/
val->intval = 100;
#endif
break;
default:
return -EINVAL;
}
return 0;
default:
return -EINVAL;
}
return 0;
}
static int s2mu106_fg_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct s2mu106_fuelgauge_data *fuelgauge = power_supply_get_drvdata(psy);
enum s2m_power_supply_property s2m_psp = (enum s2m_power_supply_property) psp;
switch ((int)psp) {
case POWER_SUPPLY_PROP_STATUS:
break;
case POWER_SUPPLY_PROP_ONLINE:
fuelgauge->cable_type = val->intval;
break;
case POWER_SUPPLY_PROP_CAPACITY:
break;
case POWER_SUPPLY_PROP_TEMP:
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
s2mu106_set_temperature(fuelgauge, val->intval);
break;
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
break;
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
break;
case POWER_SUPPLY_PROP_ENERGY_AVG:
break;
case POWER_SUPPLY_S2M_PROP_MIN ... POWER_SUPPLY_S2M_PROP_MAX:
switch (s2m_psp) {
case POWER_SUPPLY_S2M_PROP_CHARGING_ENABLED:
if (val->intval)
fuelgauge->is_charging = true;
else
fuelgauge->is_charging = false;
break;
default:
return -EINVAL;
}
return 0;
default:
return -EINVAL;
}
return 0;
}
static void s2mu106_fg_isr_work(struct work_struct *work)
{
struct s2mu106_fuelgauge_data *fuelgauge = container_of(work, struct s2mu106_fuelgauge_data, isr_work.work);
u8 fg_alert_status = 0;
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_STATUS, &fg_alert_status);
dev_info(&fuelgauge->i2c->dev, "%s: fg_alert_status(0x%x)\n", __func__, fg_alert_status);
fg_alert_status &= 0x03;
if (fg_alert_status & 0x01)
pr_info("%s: Battery Level(SOC) is very Low!\n", __func__);
if (fg_alert_status & 0x02) {
int voltage = s2mu106_get_vbat(fuelgauge);
pr_info("%s: Battery Votage is very Low! (%dmV)\n", __func__, voltage);
}
if (!fg_alert_status) {
fuelgauge->is_fuel_alerted = false;
pr_info("%s: SOC or Voltage is Good!\n", __func__);
fg_wake_unlock(fuelgauge->fuel_alert_ws);
}
}
static irqreturn_t s2mu106_fg_irq_thread(int irq, void *irq_data)
{
struct s2mu106_fuelgauge_data *fuelgauge = irq_data;
u8 fg_irq = 0;
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_IRQ, &fg_irq);
dev_info(&fuelgauge->i2c->dev, "%s: fg_irq(0x%x)\n", __func__, fg_irq);
if (fuelgauge->is_fuel_alerted)
return IRQ_HANDLED;
fg_wake_lock(fuelgauge->fuel_alert_ws);
fuelgauge->is_fuel_alerted = true;
schedule_delayed_work(&fuelgauge->isr_work, 0);
return IRQ_HANDLED;
}
#if IS_ENABLED(CONFIG_OF)
static int s2mu106_fuelgauge_parse_dt(struct s2mu106_fuelgauge_data *fuelgauge)
{
struct device_node *np = of_find_node_by_name(NULL, "s2mu106-fuelgauge");
int ret;
/* reset, irq gpio info */
if (np == NULL) {
pr_err("%s: np NULL\n", __func__);
} else {
ret = of_property_read_u32(np, "fuelgauge,fuel_alert_vol", &fuelgauge->pdata->fuel_alert_vol);
if (ret < 0) {
fuelgauge->pdata->fuel_alert_vol = 3300;
pr_err("%s: Default value of fuel_alert_vol: %d\n", __func__, fuelgauge->pdata->fuel_alert_vol);
}
ret = of_property_read_u32(np, "fuelgauge,fuel_alert_soc", &fuelgauge->pdata->fuel_alert_soc);
if (ret < 0)
pr_err("%s: error reading pdata->fuel_alert_soc %d\n", __func__, ret);
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,fuelgauge_name",
(char const **)&fuelgauge->pdata->fuelgauge_name);
if (ret < 0)
pr_err("%s error reading battery,fuelgauge_name\n", __func__);
}
/* get battery node */
np = of_find_node_by_name(NULL, "battery");
if (!np) {
pr_err("%s: battery node NULL\n", __func__);
} else {
/* get battery data */
ret = of_property_read_u32_array(np, "battery,battery_table3",
fuelgauge->info.battery_table3, 88);
if (ret < 0)
pr_err("%s: error reading battery,battery_table3\n", __func__);
ret = of_property_read_u32_array(np, "battery,battery_table4",
fuelgauge->info.battery_table4, 22);
if (ret < 0)
pr_err("%s: error reading battery,battery_table4\n", __func__);
ret = of_property_read_u32_array(np, "battery,batcap",
fuelgauge->info.batcap, 4);
if (ret < 0)
pr_err("%s: error reading battery,batcap\n", __func__);
ret = of_property_read_u32_array(np, "battery,soc_arr_val",
fuelgauge->info.soc_arr_val, 22);
if (ret < 0)
pr_err("%s: error reading battery,soc_arr_val\n", __func__);
ret = of_property_read_u32_array(np, "battery,ocv_arr_val",
fuelgauge->info.ocv_arr_val, 22);
if (ret < 0)
pr_err("%s: error reading battery,ocv_arr_val\n", __func__);
ret = of_property_read_u32_array(np, "battery,accum",
fuelgauge->info.accum, 2);
if (ret < 0) {
fuelgauge->info.accum[1] = 0x00; // REG 0x44
fuelgauge->info.accum[0] = 0x08; // REG 0x45
pr_err("%s: There is no cell1 accumulative rate in DT. Use default value(0x800)\n",
__func__);
}
ret = of_property_read_u32(np, "battery,battery_param_ver", &fuelgauge->info.battery_param_ver);
if (ret < 0)
pr_err("%s: There is no battery parameter version\n", __func__);
ret = of_property_read_u32(np, "battery,low_temp_limit", &fuelgauge->low_temp_limit);
if (ret < 0) {
pr_err("%s: There is no low temperature limit. Use default(100)\n", __func__);
fuelgauge->low_temp_limit = 100;
}
}
}
return 0;
}
static const struct of_device_id s2mu106_fuelgauge_match_table[] = {
{ .compatible = "samsung,s2mu106-fuelgauge",},
{},
};
#else
static int s2mu106_fuelgauge_parse_dt(struct s2mu106_fuelgauge_data *fuelgauge)
{
return 0;
}
#define s2mu106_fuelgauge_match_table NULL
#endif /* CONFIG_OF */
static const struct power_supply_desc s2mu106_fuelgauge_power_supply_desc = {
.name = "s2mu106-fuelgauge",
.type = POWER_SUPPLY_TYPE_UNKNOWN,
.properties = s2mu106_fuelgauge_props,
.num_properties = ARRAY_SIZE(s2mu106_fuelgauge_props),
.get_property = s2mu106_fg_get_property,
.set_property = s2mu106_fg_set_property,
};
static int s2mu106_fuelgauge_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct s2mu106_fuelgauge_data *fuelgauge;
int raw_soc_val;
struct power_supply_config fuelgauge_cfg = {};
int ret = 0;
u8 temp = 0;
pr_info("%s: S2MU106 Fuelgauge Driver Loading\n", __func__);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
fuelgauge = kzalloc(sizeof(*fuelgauge), GFP_KERNEL);
if (!fuelgauge)
return -ENOMEM;
mutex_init(&fuelgauge->fg_lock);
fuelgauge->i2c = client;
if (client->dev.of_node) {
fuelgauge->pdata = devm_kzalloc(&client->dev, sizeof(*(fuelgauge->pdata)), GFP_KERNEL);
if (!fuelgauge->pdata) {
ret = -ENOMEM;
goto err_parse_dt_nomem;
}
ret = s2mu106_fuelgauge_parse_dt(fuelgauge);
if (ret < 0)
goto err_parse_dt;
} else
fuelgauge->pdata = client->dev.platform_data;
i2c_set_clientdata(client, fuelgauge);
if (fuelgauge->pdata->fuelgauge_name == NULL)
fuelgauge->pdata->fuelgauge_name = "s2mu106-fuelgauge";
fuelgauge_cfg.drv_data = fuelgauge;
fuelgauge->revision = 0;
s2mu106_read_reg_byte(fuelgauge->i2c, 0x48, &temp);
fuelgauge->revision = (temp & 0xF0) >> 4;
pr_info("%s: S2MU106 Fuelgauge revision: 0x%x, reg 0x48 = 0x%x\n", __func__, fuelgauge->revision, temp);
fuelgauge->info.soc = 0;
raw_soc_val = s2mu106_get_rawsoc(fuelgauge);
s2mu106_read_reg_byte(fuelgauge->i2c, 0x4A, &temp);
pr_info("%s: 0x4A = 0x%02x, rawsoc = %d\n", __func__, temp, raw_soc_val);
if (temp == 0x10)
fuelgauge->mode = CURRENT_MODE;
else if (temp == 0xFF)
fuelgauge->mode = HIGH_SOC_VOLTAGE_MODE;
#if IS_ENABLED(TEMP_COMPEN)
fuelgauge->init_start = 1;
#endif
#if IS_ENABLED(BATCAP_LEARN)
fuelgauge->learn_start = false;
fuelgauge->cond1_ok = false;
fuelgauge->c1_count = 0;
fuelgauge->c2_count = 0;
#endif
s2mu106_init_regs(fuelgauge);
fuelgauge->psy_fg = power_supply_register(&client->dev, &s2mu106_fuelgauge_power_supply_desc, &fuelgauge_cfg);
if (!fuelgauge->psy_fg) {
pr_err("%s: Failed to Register psy_fg\n", __func__);
ret = PTR_ERR(fuelgauge->psy_fg);
goto err_data_free;
}
fuelgauge->is_fuel_alerted = false;
if (fuelgauge->pdata->fuel_alert_soc >= 0) {
s2mu106_fuelgauge_fuelalert_init(fuelgauge->i2c, fuelgauge->pdata->fuel_alert_soc);
/* Set wake_lock */
if (fg_set_wake_lock(fuelgauge) < 0) {
pr_err("%s: fg_set_wake_lock fail\n", __func__);
goto err_wake_lock;
}
if (fuelgauge->pdata->fg_irq > 0) {
INIT_DELAYED_WORK(&fuelgauge->isr_work, s2mu106_fg_isr_work);
fuelgauge->fg_irq = gpio_to_irq(fuelgauge->pdata->fg_irq);
dev_info(&client->dev, "%s: fg_irq = %d\n", __func__, fuelgauge->fg_irq);
if (fuelgauge->fg_irq > 0) {
ret = request_threaded_irq(fuelgauge->fg_irq,
NULL, s2mu106_fg_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"fuelgauge-irq", fuelgauge);
if (ret) {
dev_err(&client->dev, "%s: Failed to Request IRQ\n", __func__);
goto err_supply_unreg;
}
ret = enable_irq_wake(fuelgauge->fg_irq);
if (ret < 0)
dev_err(&client->dev,
"%s: Failed to Enable Wakeup Source(%d)\n", __func__, ret);
} else {
dev_err(&client->dev, "%s: Failed gpio_to_irq(%d)\n", __func__, fuelgauge->fg_irq);
goto err_supply_unreg;
}
}
}
#if IS_ENABLED(TEMP_COMPEN) || IS_ENABLED(BATCAP_LEARN)
fuelgauge->bat_charging = false;
#endif
fuelgauge->probe_done = true;
s2mu106_read_reg_byte(fuelgauge->i2c, S2MU106_REG_FG_ID, &temp);
pr_info("%s: parameter ver. in IC: 0x%02x, in kernel: 0x%02x\n",
__func__, temp & 0x0F, fuelgauge->info.battery_param_ver);
pr_info("%s: S2MU106 Fuelgauge Driver Loaded\n", __func__);
return 0;
err_supply_unreg:
power_supply_unregister(fuelgauge->psy_fg);
err_wake_lock:
wakeup_source_unregister(fuelgauge->fuel_alert_ws);
err_data_free:
if (client->dev.of_node)
kfree(fuelgauge->pdata);
err_parse_dt:
err_parse_dt_nomem:
mutex_destroy(&fuelgauge->fg_lock);
kfree(fuelgauge);
return ret;
}
static const struct i2c_device_id s2mu106_fuelgauge_id[] = {
{"s2mu106-fuelgauge", 0},
{}
};
static void s2mu106_fuelgauge_shutdown(struct i2c_client *client)
{
}
static int s2mu106_fuelgauge_remove(struct i2c_client *client)
{
struct s2mu106_fuelgauge_data *fuelgauge = i2c_get_clientdata(client);
if (fuelgauge->pdata->fuel_alert_soc >= 0)
device_init_wakeup(&fuelgauge->i2c->dev, false);
return 0;
}
#if IS_ENABLED(CONFIG_PM)
static int s2mu106_fuelgauge_suspend(struct device *dev)
{
return 0;
}
static int s2mu106_fuelgauge_resume(struct device *dev)
{
return 0;
}
#else
#define s2mu106_fuelgauge_suspend NULL
#define s2mu106_fuelgauge_resume NULL
#endif
static SIMPLE_DEV_PM_OPS(s2mu106_fuelgauge_pm_ops, s2mu106_fuelgauge_suspend,
s2mu106_fuelgauge_resume);
static struct i2c_driver s2mu106_fuelgauge_driver = {
.driver = {
.name = "s2mu106-fuelgauge",
.owner = THIS_MODULE,
.pm = &s2mu106_fuelgauge_pm_ops,
.of_match_table = s2mu106_fuelgauge_match_table,
},
.probe = s2mu106_fuelgauge_probe,
.remove = s2mu106_fuelgauge_remove,
.shutdown = s2mu106_fuelgauge_shutdown,
.id_table = s2mu106_fuelgauge_id,
};
static int __init s2mu106_fuelgauge_init(void)
{
pr_info("%s\n", __func__);
return i2c_add_driver(&s2mu106_fuelgauge_driver);
}
static void __exit s2mu106_fuelgauge_exit(void)
{
i2c_del_driver(&s2mu106_fuelgauge_driver);
}
module_init(s2mu106_fuelgauge_init);
module_exit(s2mu106_fuelgauge_exit);
MODULE_DESCRIPTION("Samsung S2MU106 Fuel Gauge Driver");
MODULE_AUTHOR("Samsung Electronics");
MODULE_SOFTDEP("post: s2mu106_charger");
MODULE_LICENSE("GPL");
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