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android / kernel / google-modules / bms / ba6ba8b95e4fd41544bb6df08b5082b804296b06 / . / pca9468_charger.c
blob: 68e872ca046a2a4e9d8e46d9f52d0d203add9b01 [file] [log] [blame]
/*
* Driver for the NXP PCA9468 battery charger.
*
* Copyright (C) 2018 NXP Semiconductor.
* Copyright 2020 Google, LLC
*
* 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.
*/
#include <linux/err.h>
#include <linux/version.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of_irq.h>
#include <linux/of_device.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/rtc.h>
#include "pca9468_regs.h"
#include "pca9468_charger.h"
#if defined (CONFIG_OF)
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#endif /* CONFIG_OF */
/* adc_gain bit[7:4] of reg 0x31 - 2's complement */
static int adc_gain[16] = { 0, 1, 2, 3, 4, 5, 6, 7,
-8, -7, -6, -5, -4, -3, -2, -1};
/* Timer definition */
#define PCA9468_VBATMIN_CHECK_T 1000 /* 1000ms */
#define PCA9468_CCMODE_CHECK1_T 5000 /* 10000ms -> 500ms */
#define PCA9468_CCMODE_CHECK2_T 5000 /* 5000ms */
#define PCA9468_CVMODE_CHECK_T 10000 /* 10000ms */
#define PCA4968_ENABLE_DELAY_T 150 /* 150ms */
#define PCA9468_CVMODE_CHECK2_T 1000 /* 1000ms */
/* Battery Threshold */
#define PCA9468_DC_VBAT_MIN 3500000 /* uV */
/* Input Current Limit default value */
#define PCA9468_IIN_CFG_DFT 2500000 /* uA*/
/* Charging Current default value */
#define PCA9468_ICHG_CFG_DFT 6000000 /* uA*/
/* Charging Float Voltage default value */
#define PCA9468_VFLOAT_DFT 4350000 /* uV */
/* Charging Sub Float Voltage default value */
#define PCA9468_VFLOAT_SUB_DFT 5000000 /* 5000000uV */
/* Sense Resistance default value */
#define PCA9468_SENSE_R_DFT 1 /* 10mOhm */
/* Switching Frequency default value */
#define PCA9468_FSW_CFG_DFT 3 /* 980KHz */
/* NTC threshold voltage default value */
#define PCA9468_NTC_TH_DFT 0 /* uV*/
/* Charging Done Condition */
#define PCA9468_ICHG_DONE_DFT 1000000 /* uA */
#define PCA9468_IIN_DONE_DFT 500000 /* uA */
/* parallel charging done conditoin */
#define PCA9468_IIN_P_DONE 1000000 /* uA */
/* Parallel charging default threshold */
#define PCA9468_IIN_P_TH_DFT 4000000 /* uA */
/* Single charging default threshold */
#define PCA9468_IIN_S_TH_DFT 10000000 /* uA */
/* Maximum TA voltage threshold */
#define PCA9468_TA_MAX_VOL 9800000 /* uV */
/* Maximum TA current threshold */
#define PCA9468_TA_MAX_CUR 2500000 /* uA */
/* Minimum TA current threshold */
#define PCA9468_TA_MIN_CUR 1000000 /* uA - PPS minimum current */
/* Minimum TA voltage threshold in Preset mode */
#define PCA9468_TA_MIN_VOL_PRESET 8000000 /* uV */
/* TA voltage threshold starting Adjust CC mode */
#define PCA9468_TA_MIN_VOL_CCADJ 8500000 /* 8000000uV --> 8500000uV */
#define PCA9468_TA_VOL_PRE_OFFSET 500000 /* uV */
/* Adjust CC mode TA voltage step */
#define PCA9468_TA_VOL_STEP_ADJ_CC 40000 /* uV */
/* Pre CV mode TA voltage step */
#define PCA9468_TA_VOL_STEP_PRE_CV 20000 /* uV */
/* IIN_CC adc offset for accuracy */
#define PCA9468_IIN_ADC_OFFSET 20000 /* uA */
/* IIN_CC compensation offset */
#define PCA9468_IIN_CC_COMP_OFFSET 200000 /* uA */
/* IIN_CC compensation offset in Power Limit Mode(Constant Power) TA */
#define PCA9468_IIN_CC_COMP_OFFSET_CP 20000 /* uA */
/* TA maximum voltage that can support CC in Constant Power Mode */
#define PCA9468_TA_MAX_VOL_CP 9800000 /* 9760000uV --> 9800000uV */
/* maximum retry counter for restarting charging */
#define PCA9468_MAX_RETRY_CNT 3 /* retries */
/* TA IIN tolerance */
#define PCA9468_TA_IIN_OFFSET 100000 /* uA */
/* IIN_CC upper protection offset in Power Limit Mode TA */
#define PCA9468_IIN_CC_UPPER_OFFSET 50000 /* 50mA */
/* PD Message Voltage and Current Step */
#define PD_MSG_TA_VOL_STEP 20000 /* uV */
#define PD_MSG_TA_CUR_STEP 50000 /* uA */
/* Maximum WCRX voltage threshold */
#define PCA9468_WCRX_MAX_VOL 9750000 /* uV */
/* WCRX voltage Step */
#define WCRX_VOL_STEP 100000 /* uV */
/* Switching charger minimum current */
#define SWCHG_ICL_MIN 100000 /* uA */
#define SWCHG_ICL_NORMAL 3000000 /* uA */
#define PCA9468_OTV_MARGIN 12000 /* uV */
/* INT1 Register Buffer */
enum {
REG_INT1,
REG_INT1_MSK,
REG_INT1_STS,
REG_INT1_MAX
};
/* STS Register Buffer */
enum {
REG_STS_A,
REG_STS_B,
REG_STS_C,
REG_STS_D,
REG_STS_MAX
};
/* CC Mode Status */
enum {
CCMODE_CHG_LOOP, /* TODO: There is no such thing */
CCMODE_VFLT_LOOP,
CCMODE_IIN_LOOP,
CCMODE_LOOP_INACTIVE,
CCMODE_VIN_UVLO,
};
/* CV Mode Status */
enum {
CVMODE_CHG_LOOP, /* TODO: There is no such thing */
CVMODE_VFLT_LOOP,
CVMODE_IIN_LOOP,
CVMODE_LOOP_INACTIVE,
CVMODE_CHG_DONE,
CVMODE_VIN_UVLO,
};
/* Timer ID */
enum {
TIMER_ID_NONE,
TIMER_VBATMIN_CHECK,
TIMER_PRESET_DC,
TIMER_PRESET_CONFIG,
TIMER_CHECK_ACTIVE,
TIMER_ADJUST_CCMODE,
TIMER_CHECK_CCMODE,
TIMER_ENTER_CVMODE,
TIMER_CHECK_CVMODE,
TIMER_PDMSG_SEND,
TIMER_ADJUST_TAVOL,
TIMER_ADJUST_TACUR,
};
/* TA increment Type */
enum {
INC_NONE, /* No increment */
INC_TA_VOL, /* TA voltage increment */
INC_TA_CUR, /* TA current increment */
};
/* BATT info Type */
enum {
BATT_CURRENT,
BATT_VOLTAGE,
};
/* IIN offset as the switching frequency in uA*/
static int iin_fsw_cfg[16] = { 9990, 10540, 11010, 11520, 12000, 12520, 12990,
13470, 5460, 6050, 6580, 7150, 7670, 8230, 8720,
9260};
/* ------------------------------------------------------------------------ */
/* ADC Read function, return uV or uA */
int pca9468_read_adc(struct pca9468_charger *pca9468, u8 adc_ch)
{
u8 reg_data[2];
u16 raw_adc = 0;
int conv_adc = -1;
int ret;
switch (adc_ch) {
case ADCCH_VOUT:
/* ~PCA9468_BIT_CH1_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_4,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_VOUT9_2) << 2) |
((reg_data[0] & PCA9468_BIT_ADC_VOUT1_0) >> 6);
conv_adc = raw_adc * VOUT_STEP; /* unit - uV */
break;
case ADCCH_VIN:
/* ~PCA9468_BIT_CH2_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_3,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_VIN9_4) << 4) |
((reg_data[0] & PCA9468_BIT_ADC_VIN3_0) >> 4);
conv_adc = raw_adc * VIN_STEP; /* unit - uV */
break;
case ADCCH_VBAT:
/* ~PCA9468_BIT_CH3_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_6,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_VBAT9_8) << 8) |
((reg_data[0] & PCA9468_BIT_ADC_VBAT7_0) >> 0);
conv_adc = raw_adc * VBAT_STEP; /* unit - uV */
break;
/* this doesn't seems right */
case ADCCH_ICHG:
/* ~PCA9468_BIT_CH4_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_2,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_IOUT9_6) << 6) |
((reg_data[0] & PCA9468_BIT_ADC_IOUT5_0) >> 2);
conv_adc = raw_adc * ICHG_STEP; /* unit - uA */
break;
case ADCCH_IIN:
/* ~PCA9468_BIT_CH5_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_1,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_IIN9_8) << 8) |
((reg_data[0] & PCA9468_BIT_ADC_IIN7_0) >> 0);
/*
* iin = rawadc*4.89 + (rawadc*4.89 - 900) *
* adc_comp_gain/100
*/
conv_adc = raw_adc * IIN_STEP + (raw_adc * IIN_STEP -
ADC_IIN_OFFSET) * pca9468->adc_comp_gain /
100; /* unit - uA */
/*
* If ADC raw value is 0, convert value will be minus value
* because of compensation gain, so in this case conv_adc
* is 0
*/
if (conv_adc < 0)
conv_adc = 0;
break;
case ADCCH_DIETEMP:
/* ~PCA9468_BIT_CH6_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_7,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_DIETEMP9_6) << 6) |
((reg_data[0] & PCA9468_BIT_ADC_DIETEMP5_0) >> 2);
/* Temp = (935-rawadc)*0.435, unit - C */
conv_adc = (935 - raw_adc) * DIETEMP_STEP / DIETEMP_DENOM;
if (conv_adc > DIETEMP_MAX)
conv_adc = DIETEMP_MAX;
else if (conv_adc < DIETEMP_MIN)
conv_adc = DIETEMP_MIN;
break;
case ADCCH_NTC:
/* ~PCA9468_BIT_CH7_EN, PCA9468_REG_ADC_CFG, udelay(120) us */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_ADC_8,
reg_data, 2);
if (ret < 0) {
conv_adc = ret;
goto error;
}
raw_adc = ((reg_data[1] & PCA9468_BIT_ADC_NTCV9_4) << 4) |
((reg_data[0] & PCA9468_BIT_ADC_NTCV3_0) >> 4);
/* Temp = (rawadc < 185)? (960-rawadc/4) : (730-rawadc/8) */
/* unit: 0.1 degree C */
if (raw_adc < NTC_CURVE_THRESHOLD)
conv_adc = NTC_CURVE_1_BASE - ((raw_adc * 10) >> NTC_CURVE_1_SHIFT);
else
conv_adc = NTC_CURVE_2_BASE - ((raw_adc * 10) >> NTC_CURVE_2_SHIFT);
break;
default:
conv_adc = -EINVAL;
break;
}
error:
/* if disabled a channel, re-enable it in -> PCA9468_REG_ADC_CFG */
pr_debug("%s: adc_ch=%u, raw_adc=%x convert_val=%d\n", __func__,
adc_ch, raw_adc, conv_adc);
return conv_adc;
}
static int pca9468_set_vfloat(struct pca9468_charger *pca9468,
unsigned int v_float)
{
int ret, val;
pr_debug("%s: vfloat=%u\n", __func__, v_float);
/* v float voltage (10 mV) resolution */
val = PCA9468_V_FLOAT(v_float);
ret = regmap_write(pca9468->regmap, PCA9468_REG_V_FLOAT, val);
return ret;
}
static int pca9468_set_charging_current(struct pca9468_charger *pca9468,
unsigned int ichg)
{
/*
* charging current cannot be controlled directly: SW needs to
* calculate the combination of TA_VOUT/IOUT to achieve no more
* than cc_max to the battery.
*
* This should be done setting new_iin and/or adjusting ta_vout
pca9468->new_iin = val->intval;
ret = pca9468_set_new_iin(pca9468);
*/
pr_debug("%s: ichg=%u\n", __func__, ichg);
pca9468->cc_max = ichg;
return 0;
}
static int pca9468_set_input_current(struct pca9468_charger *pca9468,
unsigned int iin)
{
int ret, val;
pr_debug("%s: iin=%u\n", __func__, iin);
/* round-up and increase one step */
iin = iin + PD_MSG_TA_CUR_STEP;
val = PCA9468_IIN_CFG(iin);
/* Set IIN_CFG to one step higher */
val = val + 1;
if (val > 0x32)
val = 0x32; /* maximum value is 5A */
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_IIN_CTRL,
PCA9468_BIT_IIN_CFG, val);
pr_debug("%s: real iin_cfg=%d\n", __func__,
val * PCA9468_IIN_CFG_STEP);
return ret;
}
static int pca9468_set_charging(struct pca9468_charger *pca9468, bool enable)
{
int ret, val;
pr_debug("%s: enable=%d\n", __func__, enable);
if (enable) {
/* Improve adc */
val = 0x5B;
ret = regmap_write(pca9468->regmap, PCA9468_REG_ADC_ACCESS,
val);
if (ret < 0)
goto error;
ret = regmap_update_bits(pca9468->regmap,
PCA9468_REG_ADC_IMPROVE,
PCA9468_BIT_ADC_IIN_IMP, 0);
if (ret < 0)
goto error;
/* For fixing input current error */
/* Overwrite 0x00 in 0x41 register */
val = 0x00;
ret = regmap_write(pca9468->regmap, 0x41, val);
if (ret < 0)
goto error;
/* Overwrite 0x01 in 0x43 register */
val = 0x01;
ret = regmap_write(pca9468->regmap, 0x43, val);
if (ret < 0)
goto error;
/* Overwrite 0x00 in 0x4B register */
val = 0x00;
ret = regmap_write(pca9468->regmap, 0x4B, val);
if (ret < 0)
goto error;
/* End for fixing input current error */
} else {
/* Disable NTC_PROTECTION_EN */
ret = regmap_update_bits(pca9468->regmap,
PCA9468_REG_TEMP_CTRL,
PCA9468_BIT_NTC_PROTECTION_EN, 0);
}
/* Enable PCA9468 */
val = enable ? PCA9468_STANDBY_DONOT : PCA9468_STANDBY_FORCED;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
PCA9468_BIT_STANDBY_EN, val);
if (ret < 0)
goto error;
if (enable) {
/* Wait 50ms, first to keep the start-up sequence */
mdelay(50);
/* Wait 150ms */
msleep(150);
/* Improve ADC */
ret = regmap_update_bits(pca9468->regmap,
PCA9468_REG_ADC_IMPROVE,
PCA9468_BIT_ADC_IIN_IMP,
PCA9468_BIT_ADC_IIN_IMP);
if (ret < 0)
goto error;
val = 0x00;
ret = regmap_write(pca9468->regmap, PCA9468_REG_ADC_ACCESS,
val);
/* Enable NTC_PROTECTION_EN TODO: disable */
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_TEMP_CTRL,
PCA9468_BIT_NTC_PROTECTION_EN,
PCA9468_BIT_NTC_PROTECTION_EN);
} else {
/* Wait 5ms to keep the shutdown sequence */
mdelay(5);
}
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int pca9468_check_state(u8 val[8], struct pca9468_charger *pca9468)
{
int ret;
/* Dump register */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_INT1,
&val[PCA9468_REG_INT1], 7);
if (ret < 0)
return ret;
pr_err("%s: Error reg[1]=0x%x,[2]=0x%x,[3]=0x%x,[4]=0x%x,[5]=0x%x,[6]=0x%x,[7]=0x%x\n",
__func__, val[1], val[2], val[3], val[4], val[5], val[6],
val[7]);
return 0;
}
static void pca9468_dump_test_debug(struct pca9468_charger *pca9468)
{
u8 test_val[16];
int ret;
/* Read test register for debugging */
ret = regmap_bulk_read(pca9468->regmap, 0x40, test_val, 16);
if (ret < 0) {
pr_err("%s: cannot read test registers (%d)\n", __func__, ret);
} else {
pr_err("%s: Error reg[0x40]=0x%x,[0x41]=0x%x,[0x42]=0x%x,[0x43]=0x%x,[0x44]=0x%x,[0x45]=0x%x,[0x46]=0x%x,[0x47]=0x%x\n",
__func__, test_val[0], test_val[1], test_val[2], test_val[3],
test_val[4], test_val[5], test_val[6], test_val[7]);
pr_err("%s: Error reg[0x48]=0x%x,[0x49]=0x%x,[0x4A]=0x%x,[0x4B]=0x%x,[0x4C]=0x%x,[0x4D]=0x%x,[0x4E]=0x%x,[0x4F]=0x%x\n",
__func__, test_val[8], test_val[9], test_val[10], test_val[11],
test_val[12], test_val[13], test_val[14], test_val[15]);
}
}
/* PCA9468 is not active state - standby or shutdown */
/* Stop charging in timer_work */
/* return 0 when no error is detected */
static int pca9468_check_not_active(struct pca9468_charger *pca9468)
{
u8 val[8];
int ret;
ret = pca9468_check_state(val, pca9468);
if (ret < 0) {
pr_err("%s: cannot read state\n", __func__);
return ret;
}
pca9468_dump_test_debug(pca9468);
/* Check INT1_STS first */
if ((val[PCA9468_REG_INT1_STS] & PCA9468_BIT_V_OK_STS) != PCA9468_BIT_V_OK_STS) {
/* VBUS is invalid */
pr_err("%s: VOK is invalid", __func__);
/* Check STS_A. NOTE: V_OV_TRACKING is with VIN OV */
if (val[PCA9468_REG_STS_A] & PCA9468_BIT_CFLY_SHORT_STS)
pr_err("%s: Flying Cap is shorted to GND", __func__);
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VOUT_UV_STS)
pr_err("%s: VOUT UV", __func__); /* VOUT < VOUT_OK */
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VBAT_OV_STS)
pr_err("%s: VBAT OV", __func__); /* VBAT > VBAT_OV */
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VIN_OV_STS)
pr_err("%s: VIN OV", __func__); /* VIN > V_OV_FIXED */
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VIN_UV_STS)
pr_err("%s: VIN UV", __func__); /* VIN < V_UVTH */
else
pr_err("%s: Invalid VIN or VOUT", __func__);
return -EINVAL;
}
if (val[PCA9468_REG_INT1_STS] & PCA9468_BIT_NTC_TEMP_STS) {
int ntc_adc, ntc_th; /* NTC protection */
u8 reg_data[2]; /* NTC threshold */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_NTC_TH_1,
reg_data, sizeof(reg_data));
if (ret < 0)
return -EIO;
ntc_th = ((reg_data[1] & PCA9468_BIT_NTC_THRESHOLD9_8) << 8) |
reg_data[0]; /* uV unit */
/* Read NTC ADC */
ntc_adc = pca9468_read_adc(pca9468, ADCCH_NTC); /* uV unit */
pr_err("%s: NTC Protection, NTC_TH=%d(uV), NTC_ADC=%d(uV)",
__func__, ntc_th, ntc_adc);
return -EINVAL;
}
if (val[PCA9468_REG_INT1_STS] & PCA9468_BIT_CTRL_LIMIT_STS) {
/* OCP event happens */
if (val[PCA9468_REG_STS_B] & PCA9468_BIT_OCP_FAST_STS)
pr_err("%s: IIN is over OCP_FAST", __func__);
else if (val[PCA9468_REG_STS_B] & PCA9468_BIT_OCP_AVG_STS)
pr_err("%s: IIN is over OCP_AVG", __func__);
else
pr_err("%s: No Loop active", __func__);
return -EINVAL;
}
if (val[PCA9468_REG_INT1_STS] & PCA9468_BIT_TEMP_REG_STS) {
/* Over temperature protection */
pr_err("%s: Device is in temperature regulation", __func__);
return -EINVAL;
}
if (val[PCA9468_REG_INT1_STS] & PCA9468_BIT_TIMER_STS) {
const u8 sts_b = val[PCA9468_REG_STS_B];
if (sts_b & PCA9468_BIT_CHARGE_TIMER_STS)
pr_err("%s: Charger timer is expired", __func__);
else if (sts_b & PCA9468_BIT_WATCHDOG_TIMER_STS)
pr_err("%s: Watchdog timer is expired", __func__);
else
pr_err("%s: Timer INT, but no timer STS", __func__);
return -EINVAL;
}
if (val[PCA9468_REG_STS_A] & PCA9468_BIT_CFLY_SHORT_STS) {
/* Flying cap is short to GND */
pr_err("%s: Flying Cap is shorted to GND", __func__);
return -EINVAL;
}
return 0;
}
/* Keep the current charging state, check STS_B again */
/* return 0 if VIN is still present, -EAGAIN if needs to retry, -EINVAL oth */
static int pca9468_check_standby(struct pca9468_charger *pca9468)
{
unsigned int reg_val;
int ret;
u8 val[8];
ret = regmap_read(pca9468->regmap, PCA9468_REG_STS_B, &reg_val);
if (ret < 0)
return -EIO;
pr_debug("%s: RCP check, STS_B=0x%x\n", __func__, reg_val);
/* Check Active status */
if (reg_val & PCA9468_BIT_ACTIVE_STATE_STS) {
/* RCP condition happened, but VIN is still valid */
/* If VIN is increased, input current will increased over
* IIN_LOW level
*/
/* Normal charging */
return 0;
}
/* It is not RCP condition */
if (reg_val & PCA9468_BIT_STANDBY_STATE_STS) {
/* Need to retry if DC is in starting state */
pr_err("%s: Any abnormal condition, retry\n", __func__);
ret = -EAGAIN;
} else {
pr_err("%s: Shutdown state\n", __func__);
ret = -EINVAL;
}
/* Dump registers again */
pca9468_check_state(val, pca9468);
ret = regmap_bulk_read(pca9468->regmap, 0x48, val, 3);
pr_err("%s: Error reg[0x48]=0x%x,[0x49]=0x%x,[0x4a]=0x%x\n",
__func__, val[0], val[1], val[2]);
return ret;
}
/* Check Active status */
static int pca9468_check_error(struct pca9468_charger *pca9468)
{
unsigned int reg_val;
int ret;
ret = regmap_read(pca9468->regmap, PCA9468_REG_STS_B, &reg_val);
if (ret < 0)
goto error;
/* PCA9468 is active state */
if (reg_val & PCA9468_BIT_ACTIVE_STATE_STS) {
int vbatt;
/* PCA9468 is charging */
/* Check whether the battery voltage is over the minimum */
vbatt = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbatt > PCA9468_DC_VBAT_MIN) {
/* Normal charging battery level */
/* Check temperature regulation loop */
/* Read INT1_STS register */
ret = regmap_read(pca9468->regmap, PCA9468_REG_INT1_STS,
&reg_val);
if (ret < 0) {
pr_err("%s: cannot read status (%d)\n",
__func__, ret);
} else if (reg_val & PCA9468_BIT_TEMP_REG_STS) {
/* Over temperature protection */
pr_err("%s: Device is in temperature regulation",
__func__);
ret = -EINVAL;
}
} else {
/* Abnormal battery level */
pr_err("%s: Error abnormal battery voltage=%d\n",
__func__, vbatt);
ret = -EINVAL;
}
pr_debug("%s: Active Status=%d\n", __func__, ret);
return ret;
}
/* not in error but in standby or shutdown */
/* will stop charging in timer_work */
ret = pca9468_check_not_active(pca9468);
if (ret < 0) {
/* There was an error, done... */
} else if ((reg_val & PCA9468_BIT_STANDBY_STATE_STS) == 0) {
/* PCA9468 is in shutdown state */
pr_err("%s: PCA9468 is in shutdown\n", __func__);
ret = -EINVAL;
} else {
/* Standby? state */
/* Check the RCP condition, T_REVI_DET is 300ms */
/* Wait 200ms */
msleep(200);
/*
* Sometimes battery driver might call set_property function
* to stop charging during msleep. At this case, charging
* state would change DC_STATE_NO_CHARGING. PCA9468 should
* stop checking RCP condition and exit timer_work
*/
if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
pr_err("%s: other driver forced to stop direct charging\n",
__func__);
ret = -EINVAL;
} else {
ret = pca9468_check_standby(pca9468);
if (ret == 0) {
pr_info("%s: RCP happened, but VIN is valid\n",
__func__);
}
}
}
error:
pr_debug("%s: Not Active Status=%d\n", __func__, ret);
return -EINVAL;
}
static int pca9468_get_batt_info(struct pca9468_charger *pca9468, int info_type, int *info)
{
int ret = -EINVAL;
union power_supply_propval val;
enum power_supply_property psp;
switch (info_type) {
case BATT_CURRENT:
psp = POWER_SUPPLY_PROP_CURRENT_NOW;
break;
case BATT_VOLTAGE:
psp = POWER_SUPPLY_PROP_VOLTAGE_NOW;
break;
default:
pr_debug("%s: not supported info type %d\n", __func__, info_type);
return ret;
};
if (!pca9468->batt_psy)
pca9468->batt_psy = power_supply_get_by_name("battery");
if (pca9468->batt_psy) {
ret = power_supply_get_property(pca9468->batt_psy, psp, &val);
if (ret) {
pr_debug("%s: batt psy get info %d failed %d\n", __func__,
info_type, ret);
return ret;
}
*info = val.intval;
}
return ret;
}
#define FCC_TOLERANCE_RATIO 99
#define FCC_POWER_INCREASE_THRESHOLD 97
static int get_const_charge_voltage(struct pca9468_charger *pca9468);
/* Check CC Mode status */
static int pca9468_check_ccmode_status(struct pca9468_charger *pca9468)
{
int ibat = -EINVAL, vbat = -EINVAL, rc;
unsigned int reg_val;
int ret;
/* Read STS_A */
ret = regmap_read(pca9468->regmap, PCA9468_REG_STS_A, &reg_val);
if (ret < 0)
goto error;
/* Check STS_A */
if (reg_val & PCA9468_BIT_VIN_UV_STS) {
ret = CCMODE_VIN_UVLO;
} else if (reg_val & PCA9468_BIT_CHG_LOOP_STS) {
ret = CCMODE_CHG_LOOP;
} else if (reg_val & PCA9468_BIT_VFLT_LOOP_STS) {
ret = CCMODE_VFLT_LOOP;
} else if (reg_val & PCA9468_BIT_IIN_LOOP_STS) {
ret = CCMODE_IIN_LOOP;
} else {
ret = CCMODE_LOOP_INACTIVE;
}
/* TODO: use the delta to adjust the TA offset */
rc = pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat);
if (rc == 0)
rc = pca9468_get_batt_info(pca9468, BATT_VOLTAGE, &vbat);
pr_debug("%s: status=%d ibat:%d, cc_max:%d , vbat:%d, fv:%d\n",
__func__, ret, ibat, pca9468->cc_max, vbat, pca9468->fv_uv);
if (rc)
goto error;
if (ret == CCMODE_LOOP_INACTIVE) {
/* Battery OV/OC check */
if (ibat > ((pca9468->cc_max * FCC_TOLERANCE_RATIO) / 100)) {
pr_err("%s: force CCMODE_IIN_LOOP ibatt %d->%d\n", __func__,
ret, CCMODE_IIN_LOOP);
ret = CCMODE_IIN_LOOP;
} else if (vbat > (pca9468->fv_uv + PCA9468_OTV_MARGIN)) {
pr_err("%s: force CCMODE_IIN_LOOP fv_uv %d->%d\n", __func__,
ret, CCMODE_IIN_LOOP);
ret = CCMODE_IIN_LOOP;
}
} else {
int rc = 1, v_float, delta = 0;
const int delta_limit = 100000; /* reduce at high voltage */
const int delta_offset = 25000; /* headroom */
v_float = get_const_charge_voltage(pca9468);
if (v_float > 0)
delta = pca9468->fv_uv - vbat;
if (delta > 0)
delta += delta_offset;
if (delta > delta_limit)
delta = delta_limit;
/* will reset on disconnect */
if (pca9468->fv_uv + delta > v_float)
rc = pca9468_set_vfloat(pca9468, pca9468->fv_uv + delta);
pr_debug("%s: fv_uv=%d v_float=%d delta=%d actual=%d (%d)\n", __func__,
pca9468->fv_uv, v_float, delta, pca9468->fv_uv + delta ,rc);
}
error:
pr_debug("%s: CCMODE Status=%d\n", __func__, ret);
return ret;
}
/* Check CVMode Status */
static int pca9468_check_cvmode_status(struct pca9468_charger *pca9468)
{
unsigned int val;
int ret;
int ibat = -EINVAL, vbat = -EINVAL, rc;
/* Read STS_A */
ret = regmap_read(pca9468->regmap, PCA9468_REG_STS_A, &val);
if (ret < 0)
goto error;
/* Check STS_A */
if (val & PCA9468_BIT_CHG_LOOP_STS) {
ret = CVMODE_CHG_LOOP;
} else if (val & PCA9468_BIT_VFLT_LOOP_STS) {
ret = CVMODE_VFLT_LOOP;
} else if (val & PCA9468_BIT_IIN_LOOP_STS) {
ret = CVMODE_IIN_LOOP;
} else if (val & PCA9468_BIT_VIN_UV_STS) {
ret = CVMODE_VIN_UVLO;
} else {
/* Any LOOP is inactive */
ret = CVMODE_LOOP_INACTIVE;
}
rc = pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat);
if (rc == 0)
rc = pca9468_get_batt_info(pca9468, BATT_VOLTAGE, &vbat);
pr_debug("%s: status=%d ibat:%d, cc_max:%d , vbat:%d, fv:%d\n",
__func__, ret, ibat, pca9468->cc_max, vbat, pca9468->fv_uv);
if (rc)
goto error;
if (ret == CVMODE_LOOP_INACTIVE) {
if (ibat > ((pca9468->cc_max * FCC_TOLERANCE_RATIO) / 100)) {
pr_err("%s: force CVMODE_IIN_LOOP ibatt %d->%d\n", __func__,
ret, CVMODE_IIN_LOOP);
ret = CVMODE_IIN_LOOP;
} else if (vbat > (pca9468->fv_uv + PCA9468_OTV_MARGIN)) {
pr_err("%s: force CVMODE_IIN_LOOP fv_uv %d->%d\n", __func__,
ret, CVMODE_IIN_LOOP);
ret = CVMODE_IIN_LOOP;
}
}
error:
pr_debug("%s: CVMODE Status=%d\n", __func__, ret);
return ret;
}
static int pca9468_recover_ta(struct pca9468_charger *pca9468)
{
int ret;
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Set RX voltage to 9V */
pca9468->ta_vol = 9000000;
/* Send RX voltage */
ret = pca9468_send_rx_voltage(pca9468, WCRX_REQUEST_VOLTAGE);
} else {
/* Set TA voltage to fixed 5V */
pca9468->ta_vol = 5000000;
/* Set TA current to maximum 3A */
pca9468->ta_cur = 3000000;
/* Send PD Message */
pca9468->ta_objpos = 1; /* PDO1 - fixed 5V */
ret = pca9468_send_pd_message(pca9468, PD_MSG_REQUEST_FIXED_PDO);
}
if (ret < 0)
pr_err("%s: cannot recover TA voltage (%d)\n", __func__, ret);
return ret;
}
/* Stop Charging */
static int pca9468_stop_charging(struct pca9468_charger *pca9468)
{
int ret = 0;
/* Check the current state */
if (pca9468->charging_state == DC_STATE_NO_CHARGING)
goto done;
/* Recover switching charger ICL */
ret = pca9468_set_switching_charger(true, SWCHG_ICL_NORMAL,
pca9468->pdata->ichg_cfg,
pca9468->pdata->v_float);
if (ret < 0) {
pr_err("%s: Error-set_switching charger ICL\n", __func__);
goto error;
}
/* Stop Direct charging */
cancel_delayed_work(&pca9468->timer_work);
cancel_delayed_work(&pca9468->pps_work);
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ID_NONE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Clear parameter */
pca9468->charging_state = DC_STATE_NO_CHARGING;
pca9468->ret_state = DC_STATE_NO_CHARGING;
pca9468->prev_iin = 0;
pca9468->prev_inc = INC_NONE;
pca9468->req_new_iin = false;
pca9468->req_new_vfloat = false;
pca9468->chg_mode = CHG_NO_DC_MODE;
/* Set IIN_CFG and VFLOAT to the default value */
pca9468->pdata->iin_cfg = PCA9468_IIN_CFG_DFT;
pca9468->pdata->v_float = PCA9468_VFLOAT_DFT;
/* Clear new Vfloat and new IIN */
pca9468->new_vfloat = pca9468->pdata->v_float;
pca9468->new_iin = pca9468->pdata->iin_cfg;
/* Clear retry counter */
pca9468->retry_cnt = 0;
ret = pca9468_set_charging(pca9468, false);
if (ret < 0) {
pr_err("%s: Error-set_charging(main)\n", __func__);
goto error;
}
/* Recover TA voltage */
if (pca9468->mains_online == true)
pca9468_recover_ta(pca9468);
power_supply_changed(pca9468->mains);
done:
error:
__pm_relax(pca9468->monitor_wake_lock);
pr_debug("%s: END, ret=%d\n", __func__, ret);
return ret;
}
/* Compensate TA current for the target input current */
static int pca9468_set_ta_current_comp(struct pca9468_charger *pca9468)
{
int iin, ibat;
const ibat_limit = (pca9468->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat)) {
/* skip ibat check when failed to get ibat*/
ibat = pca9468->cc_max;
}
pr_debug("%s: iin=%d, iin_cc=%d, ibat=%d, cc_max=%d\n", __func__,
iin, pca9468->iin_cc, ibat, pca9468->cc_max);
/* Compare IIN ADC with target input current */
if (iin > (pca9468->iin_cc + PCA9468_IIN_CC_COMP_OFFSET)) {
/* TA current is higher than the target input current */
/* Compare TA current with IIN_CC */
if (pca9468->ta_cur > pca9468->iin_cc) {
/* TA current is over than IIN_CC */
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur - PD_MSG_TA_CUR_STEP;
pr_debug("%s: Comp. Cont1: ta_cur=%u\n",
__func__, pca9468->ta_cur);
/* TA current is already less than IIN_CC */
/* Compara IIN_ADC with the previous IIN_ADC */
} else if (iin < (pca9468->prev_iin - PCA9468_IIN_ADC_OFFSET)) {
/* Assume that TA operation mode is CV mode */
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol - PD_MSG_TA_VOL_STEP;
pr_debug("%s: Comp. Cont2-1: ta_vol=%u\n", __func__,
pca9468->ta_vol);
} else {
/* Assume TA operation mode is CL mode */
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur -
PD_MSG_TA_CUR_STEP;
pr_debug("%s: Comp. Cont2-2: ta_cur=%u\n", __func__,
pca9468->ta_cur);
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else if ((iin < (pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET)) ||
ibat < ibat_limit) {
if (ibat < ibat_limit)
pr_debug("%s: ibatt=%d limit=%d\n",
__func__, ibat, ibat_limit);
/* compare IIN ADC with previous IIN ADC + 20mA */
if (iin > (pca9468->prev_iin + PCA9468_IIN_ADC_OFFSET)) {
/*
* TA voltage is not enough to supply the operating
* current of RDO: increase TA voltage
*/
/* Compare TA max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA max current */
if (pca9468->ta_cur == pca9468->ta_max_cur) {
/* TA voltage and current are at max */
pr_debug("%s: Comp. End1: ta_vol=%u, ta_cur=%u\n",
__func__, pca9468->ta_vol,
pca9468->ta_cur);
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period =
PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
} else {
/* Increase TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur +
PD_MSG_TA_CUR_STEP;
pr_debug("%s: Comp. Cont3: ta_cur=%u\n",
__func__, pca9468->ta_cur);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol +
PD_MSG_TA_VOL_STEP;
pr_debug("%s: Comp. Cont4: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
}
/* TA current is lower than the target input current */
/* Check the previous TA increment */
} else if (pca9468->prev_inc == INC_TA_VOL) {
/*
* The previous increment is TA voltage, but
* input current does not increase.
*/
/* Try to increase TA current */
/* Compare TA max current */
if (pca9468->ta_cur == pca9468->ta_max_cur) {
/* TA current is already the maximum current */
/* Compare TA max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/*
* TA voltage and current are already
* the maximum values
*/
pr_debug("%s: Comp. End2: ta_vol=%u, ta_cur=%u\n",
__func__, pca9468->ta_vol,
pca9468->ta_cur);
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period =
PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol +
PD_MSG_TA_VOL_STEP;
pr_debug("%s: Comp. Cont5: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
}
} else {
/* Increase TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur +
PD_MSG_TA_CUR_STEP;
pr_debug("%s: Comp. Cont6: ta_cur=%u\n",
__func__, pca9468->ta_cur);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_CUR;
}
} else {
/*
* The previous increment is TA current,
* but input current does not increase.
*/
/* Try to increase TA voltage */
/* Compare TA max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA maximum current */
if (pca9468->ta_cur == pca9468->ta_max_cur) {
/* TA voltage and current are already
* the maximum values
*/
pr_debug("%s: Comp. End3: ta_vol=%u, ta_cur=%u\n",
__func__, pca9468->ta_vol,
pca9468->ta_cur);
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period =
PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
} else {
/* Increase TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur +
PD_MSG_TA_CUR_STEP;
pr_debug("%s: Comp. Cont7: ta_cur=%u\n",
__func__, pca9468->ta_cur);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol +
PD_MSG_TA_VOL_STEP;
pr_debug("%s: Comp. Cont8: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
}
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
pr_debug("%s: Comp. End4(valid): ta_vol=%u, ta_cur=%u\n",
__func__, pca9468->ta_vol, pca9468->ta_cur);
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
}
/* Save previous iin adc */
pca9468->prev_iin = iin;
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
return 0;
}
/* Compensate TA current for constant power mode */
static int pca9468_set_ta_current_comp2(struct pca9468_charger *pca9468)
{
int iin, ibat;
unsigned int val;
unsigned int iin_apdo;
const ibat_limit = (pca9468->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat)) {
/* skip ibat check when failed to get ibat */
ibat = pca9468->cc_max;
}
pr_debug("%s: iin=%d, iin_cc=%d, ibat=%d, cc_max=%d\n", __func__,
iin, pca9468->iin_cc, ibat, pca9468->cc_max);
/* Compare IIN ADC with target input current */
if (iin > (pca9468->pdata->iin_cfg + PCA9468_IIN_CC_COMP_OFFSET)) {
/* TA current is higher than the target input current limit */
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur - PD_MSG_TA_CUR_STEP;
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else if ((iin < (pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET_CP)) ||
(ibat < ibat_limit)) {
if (ibat < ibat_limit)
pr_debug("%s: ibatt=%d limit=%d\n", __func__,
ibat, ibat_limit);
/* TA current is lower than the target input current */
/* IIN_ADC < IIN_CC -20mA */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
const int iin_cc_lb = pca9468->iin_cc -
PCA9468_IIN_CC_COMP_OFFSET;
/* Check IIN_ADC < IIN_CC - 50mA */
if (iin < iin_cc_lb) {
/* Set new IIN_CC to IIN_CC - 50mA */
pca9468->iin_cc = pca9468->iin_cc -
PCA9468_IIN_CC_COMP_OFFSET;
/* Set new TA_MAX_VOL to TA_MAX_PWR/IIN_CC */
/* Adjust new IIN_CC with APDO resolution */
iin_apdo = pca9468->iin_cc / PD_MSG_TA_CUR_STEP;
iin_apdo = iin_apdo * PD_MSG_TA_CUR_STEP;
/* in mV */
val = pca9468->ta_max_pwr /
(iin_apdo / pca9468->chg_mode / 1000);
/* Adjust values with APDO resolution(20mV) */
val = val * 1000 / PD_MSG_TA_VOL_STEP;
val = val * PD_MSG_TA_VOL_STEP; /* uV */
/* Set new TA_MAX_VOL */
pca9468->ta_max_vol = min(val,
PCA9468_TA_MAX_VOL * pca9468->chg_mode);
/* Increase TA voltage(40mV) */
pca9468->ta_vol = pca9468->ta_vol +
PD_MSG_TA_VOL_STEP*2;
pr_debug("%s: Comp. Cont1: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else {
/* Wait for next current step compensation */
/* IIN_CC - 50mA < IIN ADC < IIN_CC - 20mA */
pr_debug("%s: Comp.(wait): ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK2_T;
mutex_unlock(&pca9468->lock);
}
} else {
/* Increase TA voltage(40mV) */
pca9468->ta_vol = pca9468->ta_vol +
PD_MSG_TA_VOL_STEP * 2;
if (pca9468->ta_vol > pca9468->ta_max_vol)
pca9468->ta_vol = pca9468->ta_max_vol;
pr_debug("%s: Comp. Cont2: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CFG + 50mA */
pr_debug("%s: Comp. End(valid): ta_vol=%u\n", __func__,
pca9468->ta_vol);
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK2_T;
mutex_unlock(&pca9468->lock);
}
/* Save previous iin adc */
pca9468->prev_iin = iin;
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
return 0;
}
/* Compensate TA voltage for the target input current */
static int pca9468_set_ta_voltage_comp(struct pca9468_charger *pca9468)
{
int iin, ibat;
const ibat_limit = (pca9468->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat)) {
/* skip ibat check when failed to get ibat */
ibat = pca9468->cc_max;
}
pr_debug("%s: iin=%d, iin_cc=%d, ibat=%d, cc_max=%d\n", __func__,
iin, pca9468->iin_cc, ibat, pca9468->cc_max);
/* Compare IIN ADC with target input current */
if (iin > (pca9468->iin_cc + PCA9468_IIN_CC_COMP_OFFSET)) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol - PD_MSG_TA_VOL_STEP;
pr_debug("%s: Comp. Cont1: ta_vol=%u\n", __func__,
pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else if ((iin < (pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET)) ||
ibat < ibat_limit) {
if (ibat < ibat_limit)
pr_debug("%s: ibatt=%d limit=%d\n",
__func__, ibat, ibat_limit);
/* TA current is lower than the target input current */
/* Compare TA max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA is already at maximum voltage */
pr_debug("%s: Comp. End1(max TA vol): ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set timer */
/* Check the current charging state */
if (pca9468->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
} else {
/* CV mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
mutex_unlock(&pca9468->lock);
}
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol + PD_MSG_TA_VOL_STEP;
pr_debug("%s: Comp. Cont2: ta_vol=%u\n", __func__,
pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
pr_debug("%s: Comp. End(valid): ta_vol=%u\n", __func__,
pca9468->ta_vol);
/* Set timer */
/* Check the current charging state */
mutex_lock(&pca9468->lock);
if (pca9468->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
} else {
/* CV mode */
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
}
mutex_unlock(&pca9468->lock);
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
return 0;
}
/* Compensate RX voltage for the target input current */
static int pca9468_set_rx_voltage_comp(struct pca9468_charger *pca9468)
{
int iin, ibat;
const ibat_limit = (pca9468->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
pr_debug("%s: ======START=======\n", __func__);
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat)) {
/* skip ibat check */
ibat = pca9468->cc_max;
}
pr_debug("%s: iin=%d, iin_cc=%d, ibat=%d, cc_max=%d\n", __func__,
iin, pca9468->iin_cc, ibat, pca9468->cc_max);
/* Compare IIN ADC with target input current */
if (iin > (pca9468->iin_cc + PCA9468_IIN_CC_COMP_OFFSET)) {
/* RX current is higher than the target input current */
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
pr_debug("%s: Comp. Cont1: rx_vol=%u\n", __func__,
pca9468->ta_vol);
/* Set RX Voltage */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else if ((iin < (pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET)) ||
ibat < ibat_limit) {
if (ibat < ibat_limit)
pr_debug("%s: ibatt=%d limit=%d\n",
__func__, ibat, ibat_limit);
/* RX current is lower than the target input current */
/* Compare RX max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA current is already the maximum voltage */
pr_debug("%s: Comp. End1(max RX vol): rx_vol=%u\n",
__func__, pca9468->ta_vol);
/* Check the current charging state */
if (pca9468->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
} else {
/* CV mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
mutex_unlock(&pca9468->lock);
}
} else {
/* Increase RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol + WCRX_VOL_STEP;
pr_debug("%s: Comp. Cont2: rx_vol=%u\n", __func__,
pca9468->ta_vol);
/* Set RX Voltage */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
pr_debug("%s: Comp. End(valid): rx_vol=%u\n", __func__,
pca9468->ta_vol);
/* Set timer */
/* Check the current charging state */
if (pca9468->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
} else {
/* CV mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
mutex_unlock(&pca9468->lock);
}
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
return 0;
}
/* Set TA current for target current */
static int pca9468_adjust_ta_current(struct pca9468_charger *pca9468)
{
int ret = 0;
int vbat;
unsigned int val;
/* Set charging state to ADJUST_TACUR */
pca9468->charging_state = DC_STATE_ADJUST_TACUR;
if (pca9468->ta_cur == pca9468->iin_cc / pca9468->chg_mode) {
/* finish sending PD message */
/* Recover IIN_CC to the original value(new_iin) */
pca9468->iin_cc = pca9468->new_iin;
/* Clear req_new_iin */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
pr_debug("%s: adj. End, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
/* Go to return state */
pca9468->charging_state = pca9468->ret_state;
/* Set timer */
if (pca9468->charging_state == DC_STATE_CC_MODE)
pca9468->timer_id = TIMER_CHECK_CCMODE;
else
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000; /* Wait 1000ms */
mutex_unlock(&pca9468->lock);
/* Compare new IIN with IIN_CFG */
} else if (pca9468->iin_cc > pca9468->pdata->iin_cfg) {
/* New iin is higher than the current iin_cfg */
/* Update iin_cfg */
pca9468->pdata->iin_cfg = pca9468->iin_cc;
/* Set IIN_CFG to new IIN */
ret = pca9468_set_input_current(pca9468, pca9468->iin_cc);
if (ret < 0)
goto error;
/* Clear Request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
/* Set new TA voltage and current */
/* Read VBAT ADC */
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
/*
* Calculate new TA maximum current and voltage that
* used in the direct charging
*/
/* Set IIN_CC to MIN[IIN, TA_MAX_CUR * chg_mode]*/
pca9468->iin_cc = min(pca9468->pdata->iin_cfg,
pca9468->ta_max_cur * pca9468->chg_mode);
/*
* Set the current IIN_CC to iin_cfg for recovering
* it after resolution adjustment
*/
pca9468->pdata->iin_cfg = pca9468->iin_cc;
/* Calculate new TA max voltage */
/*
* Adjust IIN_CC with APDO resolution(50mA) - It will
* recover to the original value after max voltage
* calculation
*/
val = pca9468->iin_cc / (PD_MSG_TA_CUR_STEP *
pca9468->chg_mode);
pca9468->iin_cc = val * (PD_MSG_TA_CUR_STEP *
pca9468->chg_mode);
/* TA_MAX_VOL = MIN[PCA9468_TA_MAX_VOL, (TA_MAX_PWR/IIN_CC)] */
val = pca9468->ta_max_pwr /
(pca9468->iin_cc / pca9468->chg_mode / 1000); /* mV */
/* Adjust values with APDO resolution(20mV) */
val = val * 1000 / PD_MSG_TA_VOL_STEP;
val = val * PD_MSG_TA_VOL_STEP; /* uV */
pca9468->ta_max_vol = min(val, PCA9468_TA_MAX_VOL *
pca9468->chg_mode);
/* TA voltage = MAX[8000mV, (2*VBAT_ADC + 500 mV)] */
pca9468->ta_vol = max(PCA9468_TA_MIN_VOL_PRESET *
pca9468->chg_mode, (2 * vbat *
pca9468->chg_mode +
PCA9468_TA_VOL_PRE_OFFSET));
/* PPS voltage resolution is 20mV */
val = pca9468->ta_vol / PD_MSG_TA_VOL_STEP;
pca9468->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* Set TA voltage to MIN[TA voltage, TA_MAX_VOL] */
pca9468->ta_vol = min(pca9468->ta_vol, pca9468->ta_max_vol);
/* Set TA current to IIN_CC */
pca9468->ta_cur = pca9468->iin_cc / pca9468->chg_mode;
/* Recover IIN_CC to the original value(iin_cfg) */
pca9468->iin_cc = pca9468->pdata->iin_cfg;
pr_debug("%s: New IIN, ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_max_vol, pca9468->ta_max_cur,
pca9468->ta_max_pwr, pca9468->iin_cc,
pca9468->chg_mode);
/* Clear previous IIN ADC */
pca9468->prev_iin = 0;
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Send PD Message and go to Adjust CC mode */
pca9468->charging_state = DC_STATE_ADJUST_CC;
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else {
/*
* Adjust IIN_CC with APDO resolution(50mA) - It will
* recover to the original value after sending PD message
*/
val = pca9468->iin_cc / PD_MSG_TA_CUR_STEP;
pca9468->iin_cc = val * PD_MSG_TA_CUR_STEP;
/* Set TA current to IIN_CC */
pca9468->ta_cur = pca9468->iin_cc / pca9468->chg_mode;
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error:
return ret;
}
/* Set TA voltage for target current */
static int pca9468_adjust_ta_voltage(struct pca9468_charger *pca9468)
{
int iin;
pca9468->charging_state = DC_STATE_ADJUST_TAVOL;
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
/* Compare IIN ADC with targer input current */
if (iin > (pca9468->iin_cc + PD_MSG_TA_CUR_STEP)) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol - PD_MSG_TA_VOL_STEP;
pr_debug("%s: adj. Cont1, ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else if (iin < (pca9468->iin_cc - PD_MSG_TA_CUR_STEP)) {
/* TA current is lower than the target input current */
/* Compare TA max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA current is already the maximum voltage */
/* Clear req_new_iin */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
/* Return charging state to the previous state */
pca9468->charging_state = pca9468->ret_state;
pr_debug("%s: adj. End1, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
/* Go to return state */
/* Set timer */
mutex_lock(&pca9468->lock);
if (pca9468->charging_state == DC_STATE_CC_MODE)
pca9468->timer_id = TIMER_CHECK_CCMODE;
else
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000; /* Wait 1000ms */
mutex_unlock(&pca9468->lock);
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol + PD_MSG_TA_VOL_STEP;
pr_debug("%s: adj. Cont2, ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
} else {
/* IIN ADC is in valid range */
/* Clear req_new_iin */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
/* Return charging state to the previous state */
pca9468->charging_state = pca9468->ret_state;
pr_debug("%s: adj. End2, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
/* Go to return state */
/* Set timer */
mutex_lock(&pca9468->lock);
if (pca9468->charging_state == DC_STATE_CC_MODE)
pca9468->timer_id = TIMER_CHECK_CCMODE;
else
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000; /* Wait 1000ms */
mutex_unlock(&pca9468->lock);
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
return 0;
}
/* Set RX voltage for target current */
static int pca9468_adjust_rx_voltage(struct pca9468_charger *pca9468)
{
int iin;
pca9468->charging_state = DC_STATE_ADJUST_TAVOL;
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
/* Compare IIN ADC with targer input current */
if (iin > (pca9468->iin_cc + PCA9468_IIN_CC_COMP_OFFSET)) {
/* RX current is higher than the target input current */
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
pr_debug("%s: adj. Cont1, rx_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set RX voltage */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else if (iin < (pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET)) {
/* RX current is lower than the target input current */
/* Compare RX max voltage */
if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* RX current is already the maximum voltage */
/* Clear req_new_iin */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
pr_debug("%s: adj. End1, rx_vol=%u, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_vol, pca9468->iin_cc,
pca9468->chg_mode);
/* Return charging state to the previous state */
pca9468->charging_state = pca9468->ret_state;
/* Go to return state */
/* Set timer */
mutex_lock(&pca9468->lock);
if (pca9468->charging_state == DC_STATE_CC_MODE)
pca9468->timer_id = TIMER_CHECK_CCMODE;
else
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000; /* Wait 1000ms */
mutex_unlock(&pca9468->lock);
} else {
/* Increase RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol + WCRX_VOL_STEP;
pr_debug("%s: adj. Cont2, rx_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set RX voltage */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
} else {
/* IIN ADC is in valid range */
/* Clear req_new_iin */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
pr_debug("%s: adj. End2, rx_vol=%u, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_vol, pca9468->iin_cc,
pca9468->chg_mode);
/* Return charging state to the previous state */
pca9468->charging_state = pca9468->ret_state;
/* Go to return state */
/* Set timer */
mutex_lock(&pca9468->lock);
if (pca9468->charging_state == DC_STATE_CC_MODE)
pca9468->timer_id = TIMER_CHECK_CCMODE;
else
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000; /* Wait 1000ms */
mutex_unlock(&pca9468->lock);
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
return 0;
}
/* Set new input current */
static int pca9468_set_new_iin(struct pca9468_charger *pca9468)
{
int ret = 0;
pr_debug("%s: new_iin=%d\n", __func__, pca9468->new_iin);
/* Check the charging state */
if (pca9468->charging_state == DC_STATE_NO_CHARGING ||
pca9468->charging_state == DC_STATE_CHECK_VBAT) {
/* Apply new iin when the direct charging is started */
pca9468->pdata->iin_cfg = pca9468->new_iin;
return 0;
}
/* Check whether the previous request is done */
if (pca9468->req_new_iin) {
/* same as previous request nevermind */
if (pca9468->iin_cc == pca9468->new_iin)
return 0;
/* The previous request is not done yet */
pr_err("%s: cannot request new iin current=%d new_iin=%d \n",
__func__, pca9468->iin_cc, pca9468->new_iin);
return -EBUSY;
}
/* Set request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = true;
mutex_unlock(&pca9468->lock);
/* Check the charging state */
if ((pca9468->charging_state == DC_STATE_CC_MODE) ||
(pca9468->charging_state == DC_STATE_CV_MODE) ||
(pca9468->charging_state == DC_STATE_CHARGING_DONE)) {
/* cancel delayed_work */
cancel_delayed_work(&pca9468->timer_work);
/* Set new IIN to IIN_CC */
pca9468->iin_cc = pca9468->new_iin;
/* Save return state */
pca9468->ret_state = pca9468->charging_state;
pr_debug("charging_state=%d\n", pca9468->charging_state);
/* Check the TA type first */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Wireless Charger is connected */
ret = pca9468_adjust_rx_voltage(pca9468);
} else {
/* USBPD TA is connected */
/* Check new IIN with the minimum TA current */
if (pca9468->iin_cc < (PCA9468_TA_MIN_CUR *
pca9468->chg_mode)) {
/* TA current = PCA9468_TA_MIN_CUR(1.0A) */
pca9468->ta_cur = PCA9468_TA_MIN_CUR;
/* control TA voltage for request current */
ret = pca9468_adjust_ta_voltage(pca9468);
} else {
/* control TA current for request current */
ret = pca9468_adjust_ta_current(pca9468);
}
}
} else {
/* Wait for next valid state */
pr_debug("%s: Not support new iin yet in charging state=%d\n",
__func__, pca9468->charging_state);
}
pr_debug("%s: ret=%d\n", __func__, ret);
return ret;
}
/* Set new float voltage */
static int pca9468_set_new_vfloat(struct pca9468_charger *pca9468)
{
int ret = 0;
int vbat;
unsigned int val;
/* Check the charging state */
if (pca9468->charging_state == DC_STATE_NO_CHARGING ||
pca9468->charging_state == DC_STATE_CHECK_VBAT) {
/* Apply new vfloat when the direct charging is started */
pca9468->pdata->v_float = pca9468->new_vfloat;
return 0;
}
if (pca9468->req_new_vfloat) {
if (pca9468->new_vfloat == pca9468->pdata->v_float)
return 0;
/* The previous request is not done yet */
pr_err("%s: cannot request for vfloat, current=%d new_request=%d\n",
__func__, pca9468->pdata->v_float, pca9468->new_vfloat);
return -EBUSY;
}
/* Set request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_vfloat = true;
mutex_unlock(&pca9468->lock);
/* Check the charging state */
if ((pca9468->charging_state == DC_STATE_CC_MODE) ||
(pca9468->charging_state == DC_STATE_CV_MODE) ||
(pca9468->charging_state == DC_STATE_CHARGING_DONE)) {
unsigned int vmin = PCA9468_TA_MIN_VOL_PRESET * pca9468->chg_mode;
unsigned int cc_max = pca9468->ta_max_cur * pca9468->chg_mode;
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (pca9468->new_vfloat <= vbat) {
/* The new VBAT is lower than the current VBAT */
/* return invalid error */
pr_err("%s: New vfloat=%d, current=%d is lower than VBAT=%d ADC\n",
__func__, pca9468->new_vfloat, pca9468->pdata->v_float,
vbat);
return 0;
}
/* cancel delayed_work */
cancel_delayed_work(&pca9468->timer_work);
/* Set VFLOAT to new vfloat */
pca9468->pdata->v_float = pca9468->new_vfloat;
ret = pca9468_set_vfloat(pca9468, pca9468->pdata->v_float);
if (ret < 0)
goto error;
/* Set IIN_CFG to the current IIN_CC */
/* save the current iin_cc in iin_cfg */
pca9468->pdata->iin_cfg = pca9468->iin_cc;
pca9468->pdata->iin_cfg = min(pca9468->pdata->iin_cfg, cc_max);
ret = pca9468_set_input_current(pca9468, pca9468->pdata->iin_cfg);
if (ret < 0)
goto error;
pca9468->iin_cc = pca9468->pdata->iin_cfg;
/* Clear req_new_vfloat */
mutex_lock(&pca9468->lock);
pca9468->req_new_vfloat = false;
mutex_unlock(&pca9468->lock);
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/*
* Wireless Charger is connected
* Set RX voltage to MAX[8000mV*chg_mode,
* (2 * VBAT_ADC * chg_mode + 500mV)]
*/
pca9468->ta_vol = max(vmin, (2 * vbat *
pca9468->chg_mode +
PCA9468_TA_VOL_PRE_OFFSET));
/* RX voltage resolution is 100mV */
val = pca9468->ta_vol / WCRX_VOL_STEP;
pca9468->ta_vol = val * WCRX_VOL_STEP;
/* RX voltage = MIN[RX voltage, RX_MAX_VOL] */
pca9468->ta_vol = min(pca9468->ta_vol,
pca9468->ta_max_vol);
pr_debug("%s: New VFLOAT, rx_max_vol=%u, rx_vol=%u, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_max_vol,
pca9468->ta_vol, pca9468->iin_cc,
pca9468->chg_mode);
} else {
/*
* USBPD TA is connected
* Adjust IIN_CC with APDO resoultion(50mA)
* It will recover to the original value after
* max voltage calculation
*/
/* Calculate new TA max voltage */
val = pca9468->iin_cc / (PD_MSG_TA_CUR_STEP * pca9468->chg_mode);
pca9468->iin_cc = val * (PD_MSG_TA_CUR_STEP * pca9468->chg_mode);
/*
* TA_MAX_VOL = MIN[PCA9468_TA_MAX_VOL,
* (TA_MAX_PWR/IIN_CC)]
*/
val = pca9468->ta_max_pwr / (pca9468->iin_cc /
pca9468->chg_mode / 1000); /* mV */
val = val * 1000 / PD_MSG_TA_VOL_STEP; /* uV */
/* Adjust values with APDO resolution(20mV) */
val = val * PD_MSG_TA_VOL_STEP;
pca9468->ta_max_vol = min(val, PCA9468_TA_MAX_VOL *
pca9468->chg_mode);
/*
* TA voltage = MAX[8000mV*chg_mode,
* (2*VBAT_ADC*chg_mode + 500 mV)]
*/
pca9468->ta_vol = max(vmin, (2 * vbat *
pca9468->chg_mode +
PCA9468_TA_VOL_PRE_OFFSET));
/* PPS voltage resolution is 20mV */
val = pca9468->ta_vol / PD_MSG_TA_VOL_STEP;
pca9468->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* TA voltage = MIN[TA voltage, TA_MAX_VOL] */
pca9468->ta_vol = min(pca9468->ta_vol,
pca9468->ta_max_vol);
/* Set TA current to IIN_CC */
pca9468->ta_cur = pca9468->iin_cc /
pca9468->chg_mode;
/* Recover IIN_CC to the original (iin_cfg) */
pca9468->iin_cc = pca9468->pdata->iin_cfg;
pr_debug("%s: New VFLOAT, ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_max_vol,
pca9468->ta_max_cur, pca9468->ta_max_pwr,
pca9468->iin_cc, pca9468->chg_mode);
}
/* Clear previous IIN ADC, TA increment flag */
pca9468->prev_iin = 0;
pca9468->prev_inc = INC_NONE;
/* Send PD Message and go to Adjust CC mode */
pca9468->charging_state = DC_STATE_ADJUST_CC;
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else {
/* Wait for next valid state */
pr_debug("%s: Not support new vfloat yet in charging state=%d\n",
__func__, pca9468->charging_state);
}
error:
pr_debug("%s: ret=%d\n", __func__, ret);
return ret;
}
/* Set new FCC */
static int pca9468_set_new_cc_max(struct pca9468_charger *pca9468)
{
/* Check the charging state */
if ((pca9468->charging_state == DC_STATE_CC_MODE) ||
(pca9468->charging_state == DC_STATE_CV_MODE) ||
(pca9468->charging_state == DC_STATE_CHARGING_DONE)) {
pca9468->charging_state = DC_STATE_ADJUST_CC;
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ADJUST_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else {
/* Wait for next valid state */
pr_debug("%s: Not support new cc_max yet in charging state=%d\n",
__func__, pca9468->charging_state);
}
return 0;
}
/* 2:1 Direct Charging Adjust CC MODE control */
static int pca9468_charge_adjust_ccmode(struct pca9468_charger *pca9468)
{
int iin, ccmode;
int vbatt;
int vin_vol;
int ret = 0;
pr_debug("%s: ======START=======\n", __func__);
pca9468->charging_state = DC_STATE_ADJUST_CC;
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error; // This is not active mode.
/* Check the status */
ccmode = pca9468_check_ccmode_status(pca9468);
if (ccmode < 0) {
ret = ccmode;
goto error;
}
switch(ccmode) {
case CCMODE_IIN_LOOP:
case CCMODE_CHG_LOOP:
/* Check the TA type first */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
pr_debug("%s: CC adjust End(LOOP): rx_vol=%u\n",
__func__, pca9468->ta_vol);
} else {
/* Check TA current */
if (pca9468->ta_cur > PCA9468_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur -
PD_MSG_TA_CUR_STEP;
} else {
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol -
PD_MSG_TA_VOL_STEP;
}
pr_debug("%s: CC adjust End(LOOP): ta_cur=%u, ta_vol=%u\n",
__func__, pca9468->ta_cur, pca9468->ta_vol);
}
/* Read IIN ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Send PD Message and then go to CC mode */
pca9468->charging_state = DC_STATE_CC_MODE;
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
break;
case CCMODE_VFLT_LOOP:
/* Read VBAT ADC */
vbatt = pca9468_read_adc(pca9468, ADCCH_VBAT);
pr_debug("%s: CC adjust End(VFLOAT): vbatt=%d, ta_vol=%u\n",
__func__, vbatt, pca9468->ta_vol);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to Pre-CV mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
break;
case CCMODE_LOOP_INACTIVE:
/* Check IIN ADC with IIN */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
/* Check the TA type first */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* IIN_ADC > IIN_CC -20mA ? */
if (iin > (pca9468->iin_cc - PCA9468_IIN_ADC_OFFSET)) {
/* Input current is already over IIN_CC */
/* End RX voltage adjustment */
/* change charging state to CC mode */
pca9468->charging_state = DC_STATE_CC_MODE;
pr_debug("%s: CC adjust End: IIN_ADC=%d, rx_vol=%u\n",
__func__, iin, pca9468->ta_vol);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Check RX voltage */
} else if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* RX voltage is already max value */
pr_debug("%s: CC adjust End: MAX value, rx_vol=%u\n",
__func__, pca9468->ta_vol);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else {
/* Try to increase RX voltage(100mV) */
pca9468->ta_vol = pca9468->ta_vol +
WCRX_VOL_STEP;
if (pca9468->ta_vol > pca9468->ta_max_vol)
pca9468->ta_vol = pca9468->ta_max_vol;
pr_debug("%s: CC adjust. Cont: rx_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set RX voltage */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
/* USBPD TA is connected */
} else if (iin > (pca9468->iin_cc - PCA9468_IIN_ADC_OFFSET)) {
/* IIN_ADC > IIN_CC -20mA ? */
/* Input current is already over IIN_CC */
/* End TA voltage and current adjustment */
/* change charging state to CC mode */
pca9468->charging_state = DC_STATE_CC_MODE;
pr_debug("%s: CC adjust End: IIN_ADC=%d, ta_vol=%u, ta_cur=%u\n",
__func__, iin, pca9468->ta_vol,
pca9468->ta_cur);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Check TA voltage */
} else if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA voltage is already max value */
pr_debug("%s: CC adjust End: MAX value, ta_vol=%u, ta_cur=%u\n",
__func__, pca9468->ta_vol, pca9468->ta_cur);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Check TA tolerance
* The current input current compares the final input
* current(IIN_CC) with 100mA offset PPS current tolerance
* has +/-150mA, so offset defined 100mA(tolerance +50mA)
*/
} else if (iin < (pca9468->iin_cc - PCA9468_TA_IIN_OFFSET)) {
/*
* TA voltage too low to enter TA CC mode, so we
* should increase TA voltage
*/
pca9468->ta_vol = pca9468->ta_vol +
PCA9468_TA_VOL_STEP_ADJ_CC *
pca9468->chg_mode;
if (pca9468->ta_vol > pca9468->ta_max_vol)
pca9468->ta_vol = pca9468->ta_max_vol;
pr_debug("%s: CC adjust Cont: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* compare IIN ADC with previous IIN ADC + 20mA */
} else if (iin > (pca9468->prev_iin + PCA9468_IIN_ADC_OFFSET)) {
/* TA can supply more current if TA voltage is high */
/* TA voltage too low for TA CC mode: increase it */
pca9468->ta_vol = pca9468->ta_vol +
PCA9468_TA_VOL_STEP_ADJ_CC *
pca9468->chg_mode;
if (pca9468->ta_vol > pca9468->ta_max_vol)
pca9468->ta_vol = pca9468->ta_max_vol;
pr_debug("%s: CC adjust Cont: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* Check the previous increment */
} else if (pca9468->prev_inc == INC_TA_CUR) {
/*
* The previous increment is TA current, but input
* current does not increase
*/
/* Try to increase TA voltage(40mV) */
pca9468->ta_vol = pca9468->ta_vol +
PCA9468_TA_VOL_STEP_ADJ_CC *
pca9468->chg_mode;
if (pca9468->ta_vol > pca9468->ta_max_vol)
pca9468->ta_vol = pca9468->ta_max_vol;
pr_debug("%s: CC adjust(flag) Cont: ta_vol=%u\n",
__func__, pca9468->ta_vol);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
/* The previous increment is TA voltage, but input
* current does not increase
*/
/* Try to increase TA current */
/* Check APDO max current */
} else if (pca9468->ta_cur == pca9468->ta_max_cur) {
/* TA current is maximum current */
pr_debug("%s: CC adjust End(MAX_CUR): IIN_ADC=%d, ta_vol=%u, ta_cur=%u\n",
__func__, iin, pca9468->ta_vol,
pca9468->ta_cur);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
} else {
/* TA has tolerance and compensate it as real current */
/* Increase TA current(50mA) */
pca9468->ta_cur = pca9468->ta_cur + PD_MSG_TA_CUR_STEP;
if (pca9468->ta_cur > pca9468->ta_max_cur)
pca9468->ta_cur = pca9468->ta_max_cur;
pr_debug("%s: CC adjust Cont: ta_cur=%u\n",
__func__, pca9468->ta_cur);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_CUR;
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
}
/* Save previous iin adc */
pca9468->prev_iin = iin;
break;
case CCMODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
pr_debug("%s: CC adjust VIN_UVLO: ta_vol=%u, vin_vol=%d\n",
__func__, pca9468->ta_cur, vin_vol);
/* Check VIN after 1sec */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ADJUST_CCMODE;
pca9468->timer_period = 1000;
mutex_unlock(&pca9468->lock);
break;
default:
goto error;
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* 2:1 Direct Charging CC MODE control */
static int pca9468_charge_ccmode(struct pca9468_charger *pca9468)
{
int ret = 0;
int ccmode;
int vin_vol, iin;
pr_debug("%s: ======START======= \n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_CC_MODE;
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error; /* This is not active mode. */
/* Check new vfloat request and new iin request */
if (pca9468->req_new_vfloat) {
/* Clear request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_vfloat = false;
mutex_unlock(&pca9468->lock);
ret = pca9468_set_new_vfloat(pca9468);
} else if (pca9468->req_new_iin) {
/* Clear request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
ret = pca9468_set_new_iin(pca9468);
} else {
const ibat_limit = (pca9468->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
int ibat;
/* Check the charging type */
ccmode = pca9468_check_ccmode_status(pca9468);
if (ccmode < 0) {
ret = ccmode;
goto error;
}
switch(ccmode) {
case CCMODE_LOOP_INACTIVE:
if (pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat)) {
/* skip ibat check when failed to get ibat*/
ibat = pca9468->cc_max;
}
if (ibat > ibat_limit) {
/* skip current compensation when ibat is enough */
pr_debug("%s: CC INACTIVE: skip compensation for ibat=%d\n",
__func__, ibat);
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
}
/* Set input current compensation */
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Need RX voltage compensation */
ret = pca9468_set_rx_voltage_comp(pca9468);
pr_debug("%s: CC INACTIVE: rx_vol=%u\n",
__func__, pca9468->ta_vol);
} else {
const int ta_max_vol = pca9468->ta_max_vol;
/* Check TA current with TA_MIN_CUR */
if (pca9468->ta_cur <= PCA9468_TA_MIN_CUR) {
/* TA current = 1.0A */
pca9468->ta_cur = PCA9468_TA_MIN_CUR;
/* Need input voltage compensation */
ret = pca9468_set_ta_voltage_comp(pca9468);
} else if (ta_max_vol >= PCA9468_TA_MAX_VOL_CP) {
/* Need input current compensation */
ret = pca9468_set_ta_current_comp(pca9468);
} else {
/* Need input current compensation in
* constant power mode
*/
ret = pca9468_set_ta_current_comp2(pca9468);
}
pr_debug("%s: CC INACTIVE: ta_cur=%u, ta_vol=%u\n",
__func__, pca9468->ta_cur,
pca9468->ta_vol);
}
break;
case CCMODE_VFLT_LOOP:
/* Read IIN_ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
pr_debug("%s: CC VFLOAT: iin=%d\n", __func__, iin);
/* go to Pre-CV mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CCMODE_IIN_LOOP:
case CCMODE_CHG_LOOP:
/* Read IIN_ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol -
WCRX_VOL_STEP;
pr_debug("%s: CC LOOP:iin=%d, next_rx_vol=%u\n",
__func__, iin, pca9468->ta_vol);
} else {
/* USBPD TA is connected */
/* Check TA current with TA_MIN_CUR */
if (pca9468->ta_cur <= PCA9468_TA_MIN_CUR) {
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol -
PD_MSG_TA_VOL_STEP;
pr_debug("%s: CC LOOP:iin=%d, next_ta_vol=%u\n",
__func__, iin,
pca9468->ta_vol);
} else {
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur -
PD_MSG_TA_CUR_STEP;
pr_debug("%s: CC LOOP:iin=%d, next_ta_cur=%u\n",
__func__, iin,
pca9468->ta_cur);
}
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CCMODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
pr_debug("%s: CC VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d\n",
__func__, pca9468->ta_cur, pca9468->ta_vol,
vin_vol);
/* Check VIN after 1sec */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 1000;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
default:
break;
}
}
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* 2:1 Direct Charging Start CV MODE control - Pre CV MODE */
static int pca9468_charge_start_cvmode(struct pca9468_charger *pca9468)
{
int ret = 0;
int cvmode;
int vin_vol;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_START_CV;
/* Check the charging type */
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error; // This is not active mode.
/* Check the status */
cvmode = pca9468_check_cvmode_status(pca9468);
if (cvmode < 0) {
ret = cvmode;
goto error;
}
switch(cvmode) {
case CVMODE_CHG_LOOP:
case CVMODE_IIN_LOOP:
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
pr_debug("%s: PreCV Cont(IIN_LOOP): rx_vol=%u\n",
__func__, pca9468->ta_vol);
} else {
/* Check TA current */
if (pca9468->ta_cur > PCA9468_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur -
PD_MSG_TA_CUR_STEP;
pr_debug("%s: PreCV Cont: ta_cur=%u\n",
__func__, pca9468->ta_cur);
} else {
/* TA current is less than 1.0A */
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol -
PD_MSG_TA_VOL_STEP;
pr_debug("%s: PreCV Cont(IIN_LOOP): ta_vol=%u\n",
__func__, pca9468->ta_vol);
}
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_VFLT_LOOP:
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
pr_debug("%s: PreCV Cont: rx_vol=%u\n",
__func__, pca9468->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol -
PCA9468_TA_VOL_STEP_PRE_CV *
pca9468->chg_mode;
pr_debug("%s: PreCV Cont: ta_vol=%u\n",
__func__, pca9468->ta_vol);
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_LOOP_INACTIVE:
/* Exit Pre CV mode */
pr_debug("%s: PreCV End: ta_vol=%u, ta_cur=%u\n", __func__,
pca9468->ta_vol, pca9468->ta_cur);
/* Need to implement notification to other driver */
/* To do here */
/* Go to CV mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
pr_debug("%s: PreCV VIN_UVLO: ta_vol=%u, vin_vol=%u\n",
__func__, pca9468->ta_cur, vin_vol);
/* Check VIN after 1sec */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 1000;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
default:
break;
}
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* 2:1 Direct Charging CV MODE control */
static int pca9468_charge_cvmode(struct pca9468_charger *pca9468)
{
int ret = 0;
int cvmode;
int vin_vol;
int iin = 0;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_CV_MODE;
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error; /* This is not active mode. */
/* Check new vfloat request and new iin request */
if (pca9468->req_new_vfloat) {
/* Clear request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_vfloat = false;
mutex_unlock(&pca9468->lock);
ret = pca9468_set_new_vfloat(pca9468);
} else if (pca9468->req_new_iin) {
/* Clear request flag */
mutex_lock(&pca9468->lock);
pca9468->req_new_iin = false;
mutex_unlock(&pca9468->lock);
ret = pca9468_set_new_iin(pca9468);
} else {
cvmode = pca9468_check_cvmode_status(pca9468);
if (cvmode < 0) {
ret = cvmode;
goto error;
}
/* Check charging done state */
if (cvmode == CVMODE_LOOP_INACTIVE) {
/* Read IIN_ADC */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
/* Compare iin with input topoff current */
pr_debug("%s: iin=%d, iin_topoff=%u\n",
__func__, iin, pca9468->pdata->iin_topoff);
if (iin < pca9468->pdata->iin_topoff) {
/* Change cvmode status to charging done */
cvmode = CVMODE_CHG_DONE;
pr_debug("%s: CVMODE Status=%d\n",
__func__, cvmode);
}
}
switch(cvmode) {
case CVMODE_CHG_DONE:
/* Charging Done */
/* Keep CV mode until driver send stop charging */
pca9468->charging_state = DC_STATE_CHARGING_DONE;
power_supply_changed(pca9468->mains);
/* Need to implement notification function */
/* TODO: notify DONE charger here */
pr_debug("%s: CV Done\n", __func__);
if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
/* notification function called stop */
pr_debug("%s: Already stop DC\n", __func__);
break;
}
/* Notification function does not stop timer work yet */
/* Keep the charging done state */
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_CHG_LOOP:
case CVMODE_IIN_LOOP:
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX Voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol -
WCRX_VOL_STEP;
pr_debug("%s: CV LOOP, Cont: rx_vol=%u\n",
__func__, pca9468->ta_vol);
/* Check TA current */
} else if (pca9468->ta_cur > PCA9468_TA_MIN_CUR) {
/* TA current is higher than (1.0A*chg_mode) */
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur -
PD_MSG_TA_CUR_STEP;
pr_debug("%s: CV LOOP, Cont: ta_cur=%u\n",
__func__, pca9468->ta_cur);
} else {
/* TA current is less than (1.0A*chg_mode) */
/* Decrease TA Voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol -
PD_MSG_TA_VOL_STEP;
pr_debug("%s: CV LOOP, Cont: ta_vol=%u\n",
__func__, pca9468->ta_vol);
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_VFLT_LOOP:
/* Check the TA type */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage */
pca9468->ta_vol = pca9468->ta_vol -
WCRX_VOL_STEP;
pr_debug("%s: CV VFLOAT, Cont: rx_vol=%u\n",
__func__, pca9468->ta_vol);
} else {
/* Decrease TA voltage */
pca9468->ta_vol = pca9468->ta_vol -
PD_MSG_TA_VOL_STEP;
pr_debug("%s: CV VFLOAT, Cont: ta_vol=%u\n",
__func__, pca9468->ta_vol);
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_LOOP_INACTIVE:
/* Set timer */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case CVMODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
pr_debug("%s: CC VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d\n",
__func__, pca9468->ta_cur, pca9468->ta_vol,
vin_vol);
/* Check VIN after 1sec */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
default:
break;
}
}
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Preset TA voltage and current for Direct Charging Mode */
static int pca9468_preset_dcmode(struct pca9468_charger *pca9468)
{
int vbat;
unsigned long val;
int ret = 0;
int chg_mode;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_PRESET_DC;
/* Read VBAT ADC */
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* Compare VBAT with VBAT ADC */
if (vbat > pca9468->pdata->v_float) {
/* Invalid battery voltage to start direct charging */
pr_err("%s: vbat adc=%d is higher than VFLOAT=%d\n", __func__,
vbat, pca9468->pdata->v_float);
pca9468->pdata->v_float = vbat;
}
/* Check the TA type and set the charging mode */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/*
* Set the RX max current to input request current(iin_cfg)
* initially to get RX maximum current from RX IC
*/
pca9468->ta_max_cur = pca9468->pdata->iin_cfg;
/*
* Set the RX max voltage to enough high value to find RX
* maximum voltage initially
*/
pca9468->ta_max_vol = PCA9468_WCRX_MAX_VOL *
pca9468->pdata->chg_mode;
/* Get the RX max current/voltage(RX_MAX_CUR/VOL) */
ret = pca9468_get_rx_max_power(pca9468);
if (ret < 0) {
/* RX IC does not have the desired maximum voltage */
/* Check the desired mode */
if (pca9468->pdata->chg_mode == CHG_4TO1_DC_MODE) {
/*
* RX IC doesn't have any maximum voltage to
* support 4:1 mode
*/
/* RX max current/voltage with 2:1 mode */
pca9468->ta_max_vol = PCA9468_WCRX_MAX_VOL;
ret = pca9468_get_rx_max_power(pca9468);
if (ret < 0) {
pr_err("%s: RX IC doesn't have any RX voltage to support 2:1 or 4:1\n",
__func__);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
} else {
/*
* RX IC has the maximum RX voltage to
* support 2:1 mode
*/
pca9468->chg_mode = CHG_2TO1_DC_MODE;
}
} else {
/*
* The desired CHG mode is 2:1 mode RX IC
* doesn't have any RX voltage to
* support 2:1 mode
*/
pr_err("%s: RX IC doesn't have any RX voltage to support 2:1\n",
__func__);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
}
} else {
/* RX IC has the desired RX voltage */
pca9468->chg_mode = pca9468->pdata->chg_mode;
}
chg_mode = pca9468->chg_mode;
/* Set IIN_CC to MIN[IIN, (RX_MAX_CUR by RX IC)*chg_mode]*/
pca9468->iin_cc = min(pca9468->pdata->iin_cfg,
pca9468->ta_max_cur * chg_mode);
/* Set the current IIN_CC to iin_cfg */
pca9468->pdata->iin_cfg = pca9468->iin_cc;
/* RX_vol = MAX[(2*VBAT_ADC*CHG_mode + 500mV), 8.0V*CHG_mode] */
pca9468->ta_vol = max(PCA9468_TA_MIN_VOL_PRESET * chg_mode,
(2 * vbat * chg_mode +
PCA9468_TA_VOL_PRE_OFFSET));
/* RX voltage resolution is 100mV */
val = pca9468->ta_vol / WCRX_VOL_STEP;
pca9468->ta_vol = val * WCRX_VOL_STEP;
/* Set RX voltage to MIN[RX voltage, RX_MAX_VOL*chg_mode] */
pca9468->ta_vol = min(pca9468->ta_vol, pca9468->ta_max_vol);
pr_debug("%s: Preset DC, rx_max_vol=%u, rx_max_cur=%u, rx_max_pwr=%lu, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_max_vol, pca9468->ta_max_cur,
pca9468->ta_max_pwr, pca9468->iin_cc,
pca9468->chg_mode);
pr_debug("%s: Preset DC, rx_vol=%u\n", __func__,
pca9468->ta_vol);
} else {
/* Set the TA max current to input request current(iin_cfg)
* initially to get TA maximum current from PD IC
*/
pca9468->ta_max_cur = pca9468->pdata->iin_cfg;
/* high enough to to find initial TA maximum voltage */
pca9468->ta_max_vol = PCA9468_TA_MAX_VOL *
pca9468->pdata->chg_mode;
/* Search the proper object position of PDO */
pca9468->ta_objpos = 0;
/* Get the APDO max current/voltage(TA_MAX_CUR/VOL) */
ret = pca9468_get_apdo_max_power(pca9468);
if (ret < 0) {
/* TA does not have the desired APDO */
/* Check the desired mode */
if (pca9468->pdata->chg_mode == CHG_4TO1_DC_MODE) {
/* NO APDO to support 4:1 mode */
/* Use APDO max current/voltage for 2:1 mode */
pca9468->ta_max_vol = PCA9468_TA_MAX_VOL;
pca9468->ta_objpos = 0;
ret = pca9468_get_apdo_max_power(pca9468);
if (ret < 0) {
pr_err("%s: TA doesn't have any APDO to support 2:1 or 4:1\n",
__func__);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
} else {
/* TA has APDO to support 2:1 mode */
pca9468->chg_mode = CHG_2TO1_DC_MODE;
}
} else {
/* The desired TA mode is 2:1 mode */
/* No APDO to support 2:1 mode*/
pr_err("%s: TA doesn't have any APDO to support 2:1\n",
__func__);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
}
} else {
/* TA has the desired APDO */
pca9468->chg_mode = pca9468->pdata->chg_mode;
}
chg_mode = pca9468->chg_mode;
/* Calculate new TA maximum current and voltage */
/* Set IIN_CC to MIN[IIN, (TA_MAX_CUR by APDO)*chg_mode] */
pca9468->iin_cc = min(pca9468->pdata->iin_cfg,
pca9468->ta_max_cur * chg_mode);
/*
* Set the current IIN_CC to iin_cfg for recovering it after
* resolution adjustment
*/
pca9468->pdata->iin_cfg = pca9468->iin_cc;
/*
* Calculate new TA max voltage
* Adjust IIN_CC with APDO resoultion(50mA) - It will recover
* to the original value after max voltage calculation
*/
val = pca9468->iin_cc / PD_MSG_TA_CUR_STEP;
pca9468->iin_cc = val * PD_MSG_TA_CUR_STEP;
/* val= TA_MAX_PWR/(IIN_CC/chg_mode) mV */
val = pca9468->ta_max_pwr / (pca9468->iin_cc / chg_mode / 1000);
/* Adjust values with APDO resolution(20mV) */
val = val * 1000 / PD_MSG_TA_VOL_STEP;
val = val * PD_MSG_TA_VOL_STEP; /* uV */
pca9468->ta_max_vol = min(val, (unsigned long)PCA9468_TA_MAX_VOL * chg_mode);
/* MAX[8000mV*chg_mode, 2*VBAT_ADC*chg_mode+500 mV] */
pca9468->ta_vol = max(PCA9468_TA_MIN_VOL_PRESET * chg_mode,
2 * vbat * chg_mode +
PCA9468_TA_VOL_PRE_OFFSET);
/* PPS voltage resolution is 20mV */
val = pca9468->ta_vol / PD_MSG_TA_VOL_STEP;
pca9468->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* Set TA voltage to MIN[TA voltage, TA_MAX_VOL*chg_mode] */
pca9468->ta_vol = min(pca9468->ta_vol, pca9468->ta_max_vol);
/* Set the initial TA current to IIN_CC/chg_mode */
pca9468->ta_cur = pca9468->iin_cc / chg_mode;
/* Recover IIN_CC to the original value(iin_cfg) */
pca9468->iin_cc = pca9468->pdata->iin_cfg;
pr_debug("%s: Preset DC, ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u\n",
__func__, pca9468->ta_max_vol, pca9468->ta_max_cur,
pca9468->ta_max_pwr, pca9468->iin_cc,
pca9468->chg_mode);
pr_debug("%s: Preset DC, ta_vol=%u, ta_cur=%u fv_uv=%d cc_max=%d\n",
__func__, pca9468->ta_vol, pca9468->ta_cur,
pca9468->fv_uv, pca9468->cc_max);
}
/* Send PD Message */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Preset direct charging configuration */
static int pca9468_preset_config(struct pca9468_charger *pca9468)
{
int ret = 0;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_PRESET_DC;
/* Set IIN_CFG to IIN_CC */
ret = pca9468_set_input_current(pca9468, pca9468->iin_cc);
if (ret < 0)
goto error;
/* Set ICHG_CFG to enough high value */
ret = pca9468_set_charging_current(pca9468, pca9468->pdata->ichg_cfg);
if (ret < 0)
goto error;
/* Set VFLOAT */
ret = pca9468_set_vfloat(pca9468, pca9468->pdata->v_float);
if (ret < 0)
goto error;
/* Enable PCA9468 */
ret = pca9468_set_charging(pca9468, true);
if (ret < 0)
goto error;
/* Clear previous iin adc */
pca9468->prev_iin = 0;
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CHECK_ACTIVE state after 150ms*/
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_CHECK_ACTIVE;
pca9468->timer_period = PCA4968_ENABLE_DELAY_T;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Check the charging status before entering the adjust cc mode */
static int pca9468_check_active_state(struct pca9468_charger *pca9468)
{
int ret = 0;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_CHECK_ACTIVE;
ret = pca9468_check_error(pca9468);
if (ret == 0) {
/* PCA9468 is active state */
/* Clear retry counter */
pca9468->retry_cnt = 0;
/* Go to Adjust CC mode */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ADJUST_CCMODE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else if (ret == -EAGAIN) {
/* It is the retry condition */
/* Check the retry counter */
if (pca9468->retry_cnt < PCA9468_MAX_RETRY_CNT) {
/* Disable charging */
ret = pca9468_set_charging(pca9468, false);
/* Increase retry counter */
pca9468->retry_cnt++;
pr_err("%s: retry charging start - retry_cnt=%d\n",
__func__, pca9468->retry_cnt);
/* Go to DC_STATE_PRESET_DC */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PRESET_DC;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
ret = 0;
} else {
pr_err("%s: retry fail\n", __func__);
/* Notify maximum retry error */
ret = -EINVAL;
}
} else {
/* Implement error handler function if it is needed */
/* Stop charging in timer_work */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ID_NONE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
}
return ret;
}
/* Enter direct charging algorithm */
static int pca9468_start_direct_charging(struct pca9468_charger *pca9468)
{
int ret;
unsigned int val;
pr_debug("%s: =========START=========\n", __func__);
/* Set OV_DELTA to 40% */
val = OV_DELTA_40P << MASK2SHIFT(PCA9468_BIT_OV_DELTA);
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_SAFETY_CTRL,
PCA9468_BIT_OV_DELTA, val);
if (ret < 0)
return ret;
/* Set Switching Frequency */
val = pca9468->pdata->fsw_cfg;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
PCA9468_BIT_FSW_CFG, val);
if (ret < 0)
return ret;
/* Set EN_CFG to active HIGH */
val = PCA9468_EN_ACTIVE_H;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
PCA9468_BIT_EN_CFG, val);
if (ret < 0)
return ret;
/* Set NTC voltage threshold */
val = pca9468->pdata->ntc_th / PCA9468_NTC_TH_STEP;
ret = regmap_write(pca9468->regmap, PCA9468_REG_NTC_TH_1, (val & 0xFF));
if (ret < 0)
return ret;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_NTC_TH_2,
PCA9468_BIT_NTC_THRESHOLD9_8, (val >> 8));
if (ret < 0)
return ret;
ret = pca9468_set_ta_type(pca9468);
pr_info("%s: Current ta_type=%d, chg_mode=%d\n", __func__,
pca9468->ta_type, pca9468->pdata->chg_mode);
if (ret < 0)
return ret;
/* wake lock */
__pm_stay_awake(pca9468->monitor_wake_lock);
/* Preset charging configuration and TA condition */
ret = pca9468_preset_dcmode(pca9468);
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Check Vbat minimum level to start direct charging */
static int pca9468_check_vbatmin(struct pca9468_charger *pca9468)
{
int ret, vbat;
union power_supply_propval val;
pr_debug("%s: =========START=========\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
pca9468->charging_state = DC_STATE_CHECK_VBAT;
/* Check Vbat */
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* Read switching charger status */
ret = pca9468_get_swc_property(GBMS_PROP_CHARGING_ENABLED,
&val);
if (ret < 0) {
/* Start Direct Charging again after 1sec */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_VBATMIN_CHECK;
pca9468->timer_period = PCA9468_VBATMIN_CHECK_T;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else if (val.intval == 0) {
/* already disabled switching charger */
/* Clear retry counter */
pca9468->retry_cnt = 0;
/* Preset TA voltage and PCA9468 parameters */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_PRESET_DC;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else {
/* Switching charger is enabled */
if (vbat > PCA9468_DC_VBAT_MIN) {
/* Start Direct Charging */
/* now switching charger is enabled */
/* disable switching charger first */
ret = pca9468_set_switching_charger(false, 0, 0, 0);
}
/*
* Wait 1sec for stopping switching charger or
* Start 1sec timer for battery check
*/
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_VBATMIN_CHECK;
pca9468->timer_period = PCA9468_VBATMIN_CHECK_T;
mutex_unlock(&pca9468->lock);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
}
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* delayed work function for charging timer */
static void pca9468_timer_work(struct work_struct *work)
{
struct pca9468_charger *pca9468 =
container_of(work, struct pca9468_charger, timer_work.work);
int ret = 0;
unsigned int val;
pr_debug("%s: timer id=%d, charging_state=%u\n", __func__,
pca9468->timer_id, pca9468->charging_state);
switch (pca9468->timer_id) {
/* charging_state <- DC_STATE_CHECK_VBAT */
case TIMER_VBATMIN_CHECK:
ret = pca9468_check_vbatmin(pca9468);
if (ret < 0)
goto error;
break;
/* charging_state <- DC_STATE_PRESET_DC */
case TIMER_PRESET_DC:
ret = pca9468_start_direct_charging(pca9468);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* preset configuration, start charging
*/
case TIMER_PRESET_CONFIG:
ret = pca9468_preset_config(pca9468);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* 150 ms after preset_config
*/
case TIMER_CHECK_ACTIVE:
ret = pca9468_check_active_state(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_ADJUST_CCMODE:
ret = pca9468_charge_adjust_ccmode(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CCMODE:
ret = pca9468_charge_ccmode(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_ENTER_CVMODE:
/* Enter Pre-CV mode */
ret = pca9468_charge_start_cvmode(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CVMODE:
ret = pca9468_charge_cvmode(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_PDMSG_SEND:
/* Adjust TA current and voltage step */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* RX voltage resolution is 100mV */
val = pca9468->ta_vol / WCRX_VOL_STEP;
pca9468->ta_vol = val * WCRX_VOL_STEP;
/* Set RX voltage */
ret = pca9468_send_rx_voltage(pca9468,
WCRX_REQUEST_VOLTAGE);
} else {
/* PPS voltage resolution is 20mV */
val = pca9468->ta_vol / PD_MSG_TA_VOL_STEP;
pca9468->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* PPS current resolution is 50mA */
val = pca9468->ta_cur / PD_MSG_TA_CUR_STEP;
pca9468->ta_cur = val * PD_MSG_TA_CUR_STEP;
/* PPS minimum current is 1000mA */
if (pca9468->ta_cur < PCA9468_TA_MIN_CUR)
pca9468->ta_cur = PCA9468_TA_MIN_CUR;
/* Send PD Message */
ret = pca9468_send_pd_message(pca9468,
PD_MSG_REQUEST_APDO);
}
/* Go to the next state */
mutex_lock(&pca9468->lock);
switch (pca9468->charging_state) {
case DC_STATE_PRESET_DC:
pca9468->timer_id = TIMER_PRESET_CONFIG;
break;
case DC_STATE_ADJUST_CC:
pca9468->timer_id = TIMER_ADJUST_CCMODE;
break;
case DC_STATE_CC_MODE:
pca9468->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_START_CV:
pca9468->timer_id = TIMER_ENTER_CVMODE;
break;
case DC_STATE_CV_MODE:
pca9468->timer_id = TIMER_CHECK_CVMODE;
break;
case DC_STATE_ADJUST_TAVOL:
pca9468->timer_id = TIMER_ADJUST_TAVOL;
break;
case DC_STATE_ADJUST_TACUR:
pca9468->timer_id = TIMER_ADJUST_TACUR;
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0) {
pr_err("%s: Error-send_pd_message to %d (%d)\n",
__func__, pca9468->ta_type, ret);
pca9468->timer_id = TIMER_CHECK_ACTIVE;
}
if (pca9468->ta_type == TA_TYPE_WIRELESS)
pca9468->timer_period = PCA9468_PDMSG_WLC_WAIT_T;
else
pca9468->timer_period = PCA9468_PDMSG_WAIT_T;
mutex_unlock(&pca9468->lock);
pr_debug("%s: charging_state=%u next_time_id => pca9468->timer_id=%d ret=%d\n",
__func__, pca9468->charging_state, pca9468->ta_type,
ret);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
break;
case TIMER_ADJUST_TAVOL:
ret = pca9468_adjust_ta_voltage(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_ADJUST_TACUR:
ret = pca9468_adjust_ta_current(pca9468);
if (ret < 0)
goto error;
break;
case TIMER_ID_NONE:
ret = pca9468_stop_charging(pca9468);
if (ret < 0)
goto error;
break;
default:
break;
}
pr_debug("%s: period=%lums, next id:%d\n", __func__,
pca9468->timer_period, pca9468->timer_id);
/* Check the charging state again */
if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
/* Cancel work queue again */
cancel_delayed_work(&pca9468->timer_work);
cancel_delayed_work(&pca9468->pps_work);
}
return;
error:
pca9468_stop_charging(pca9468);
return;
}
/* delayed work function for pps periodic timer */
static void pca9468_pps_request_work(struct work_struct *work)
{
struct pca9468_charger *pca9468 = container_of(work,
struct pca9468_charger, pps_work.work);
int ret;
pr_debug("%s: =========START=========\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
ret = pca9468_send_pd_message(pca9468, PD_MSG_REQUEST_APDO);
if (ret < 0)
pr_err("%s: Error-send_pd_message\n", __func__);
/* TODO: background stuff */
pr_debug("%s: ret=%d\n", __func__, ret);
}
static int pca9468_hw_init(struct pca9468_charger *pca9468)
{
unsigned int val;
int ret;
pr_debug("%s: =========START=========\n", __func__);
/* Read Device info register to check the incomplete I2C operation */
ret = regmap_read(pca9468->regmap, PCA9468_REG_DEVICE_INFO, &val);
if ((ret < 0) || (val != PCA9468_DEVICE_ID)) {
/* incomplete I2C operation or I2C communication error */
/* Read Device info register again */
ret = regmap_read(pca9468->regmap, PCA9468_REG_DEVICE_INFO,
&val);
if ((ret < 0) || (val != PCA9468_DEVICE_ID)) {
dev_err(pca9468->dev,
"reading DEVICE_INFO failed, val=0x%x\n",
val);
ret = -EINVAL;
return ret;
}
}
/* Program the platform specific configuration values */
/* Set OV_DELTA to 40% */
val = OV_DELTA_40P << MASK2SHIFT(PCA9468_BIT_OV_DELTA);
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_SAFETY_CTRL,
PCA9468_BIT_OV_DELTA, val);
if (ret < 0)
return ret;
/* Set Switching Frequency */
val = pca9468->pdata->fsw_cfg << MASK2SHIFT(PCA9468_BIT_FSW_CFG);
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
PCA9468_BIT_FSW_CFG, val);
if (ret < 0)
return ret;
/* Set Reverse Current Detection and standby mode*/
val = PCA9468_BIT_REV_IIN_DET | PCA9468_EN_ACTIVE_L |
PCA9468_STANDBY_FORCED;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
(PCA9468_BIT_REV_IIN_DET |
PCA9468_BIT_EN_CFG |
PCA9468_BIT_STANDBY_EN),
val);
if (ret < 0)
return ret;
/* clear LIMIT_INCREMENT_EN */
val = 0;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_IIN_CTRL,
PCA9468_BIT_LIMIT_INCREMENT_EN, val);
if (ret < 0)
return ret;
/* Set the ADC channels, NTC is invalid if Bias is not enabled */
val = PCA9468_BIT_CH7_EN | /* NTC voltage ADC */
PCA9468_BIT_CH6_EN | /* DIETEMP ADC */
PCA9468_BIT_CH5_EN | /* IIN ADC */
PCA9468_BIT_CH3_EN | /* VBAT ADC */
PCA9468_BIT_CH2_EN | /* VIN ADC */
PCA9468_BIT_CH1_EN; /* VOUT ADC */
ret = regmap_write(pca9468->regmap, PCA9468_REG_ADC_CFG, val);
if (ret < 0)
return ret;
/* ADC Mode change */
val = 0x5B;
ret = regmap_write(pca9468->regmap, PCA9468_REG_ADC_ACCESS, val);
if (ret < 0)
return ret;
val = 0x10;
ret = regmap_write(pca9468->regmap, PCA9468_REG_ADC_MODE, val);
if (ret < 0)
return ret;
val = 0x00;
ret = regmap_write(pca9468->regmap, PCA9468_REG_ADC_ACCESS, val);
if (ret < 0)
return ret;
/* Read ADC compensation gain */
ret = regmap_read(pca9468->regmap, PCA9468_REG_ADC_ADJUST, &val);
if (ret < 0)
return ret;
pca9468->adc_comp_gain =
adc_gain[val >> MASK2SHIFT(PCA9468_BIT_ADC_GAIN)];
/* input current - uA*/
ret = pca9468_set_input_current(pca9468, pca9468->pdata->iin_cfg);
if (ret < 0)
return ret;
/* charging current */
ret = pca9468_set_charging_current(pca9468, pca9468->pdata->ichg_cfg);
if (ret < 0)
return ret;
/* v float voltage */
ret = pca9468_set_vfloat(pca9468, pca9468->pdata->v_float);
if (ret < 0)
return ret;
return ret;
}
static irqreturn_t pca9468_interrupt_handler(int irq, void *data)
{
struct pca9468_charger *pca9468 = data;
/* INT1, INT1_MSK, INT1_STS, STS_A, B, C, D */
u8 int1[REG_INT1_MAX], sts[REG_STS_MAX];
u8 masked_int; /* masked int */
bool handled = false;
int ret;
/* Read INT1, INT1_MSK, INT1_STS */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_INT1, int1, 3);
if (ret < 0) {
dev_warn(pca9468->dev, "reading INT1_X failed\n");
return IRQ_NONE;
}
/* Read STS_A, B, C, D */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_A, sts, 4);
if (ret < 0) {
dev_warn(pca9468->dev, "reading STS_X failed\n");
return IRQ_NONE;
}
pr_debug("%s: int1=0x%2x, int1_sts=0x%2x, sts_a=0x%2x\n", __func__,
int1[REG_INT1], int1[REG_INT1_STS], sts[REG_STS_A]);
/* Check Interrupt */
masked_int = int1[REG_INT1] & !int1[REG_INT1_MSK];
if (masked_int & PCA9468_BIT_V_OK_INT) {
/* V_OK interrupt happened */
mutex_lock(&pca9468->lock);
pca9468->mains_online = !!(int1[REG_INT1_STS] &
PCA9468_BIT_V_OK_STS);
/* TODO: alex perform a clean shutdown */
mutex_unlock(&pca9468->lock);
power_supply_changed(pca9468->mains);
handled = true;
}
if (masked_int & PCA9468_BIT_NTC_TEMP_INT) {
/* NTC_TEMP interrupt happened */
if (int1[REG_INT1_STS] & PCA9468_BIT_NTC_TEMP_STS) {
/* above NTC_THRESHOLD */
dev_err(pca9468->dev, "charging stopped due to NTC threshold voltage\n");
}
handled = true;
}
if (masked_int & PCA9468_BIT_CHG_PHASE_INT) {
/* CHG_PHASE interrupt happened */
if (int1[REG_INT1_STS] & PCA9468_BIT_CHG_PHASE_STS) {
/* Any of loops is active*/
if (sts[REG_STS_A] & PCA9468_BIT_VFLT_LOOP_STS) {
/* V_FLOAT loop is in regulation */
pr_debug("%s: V_FLOAT loop interrupt\n",
__func__);
/* Disable CHG_PHASE_M */
ret = regmap_update_bits(pca9468->regmap,
PCA9468_REG_INT1_MSK,
PCA9468_BIT_CHG_PHASE_M,
PCA9468_BIT_CHG_PHASE_M);
if (ret < 0) {
handled = false;
return handled;
}
/* Go to Pre CV Mode */
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 10;
mod_delayed_work(pca9468->dc_wq,
&pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else if (sts[REG_STS_A] & PCA9468_BIT_IIN_LOOP_STS) {
/* IIN loop or ICHG loop is in regulation */
pr_debug("%s: IIN loop interrupt\n", __func__);
} else if (sts[REG_STS_A] & PCA9468_BIT_CHG_LOOP_STS) {
/* ICHG loop is in regulation */
pr_debug("%s: ICHG loop interrupt\n", __func__);
}
}
handled = true;
}
if (masked_int & PCA9468_BIT_CTRL_LIMIT_INT) {
/* CTRL_LIMIT interrupt happened */
if (int1[REG_INT1_STS] & PCA9468_BIT_CTRL_LIMIT_STS) {
/* No Loop is active or OCP */
if (sts[REG_STS_B] & PCA9468_BIT_OCP_FAST_STS) {
/* Input fast over current */
dev_err(pca9468->dev, "IIN > 50A instantaneously\n");
}
if (sts[REG_STS_B] & PCA9468_BIT_OCP_AVG_STS) {
/* Input average over current */
dev_err(pca9468->dev, "IIN > IIN_CFG*150percent\n");
}
}
handled = true;
}
if (masked_int & PCA9468_BIT_TEMP_REG_INT) {
/* TEMP_REG interrupt happened */
if (int1[REG_INT1_STS] & PCA9468_BIT_TEMP_REG_STS) {
/* Device is in temperature regulation */
dev_err(pca9468->dev, "Device is in temperature regulation\n");
}
handled = true;
}
if (masked_int & PCA9468_BIT_ADC_DONE_INT) {
/* ADC complete interrupt happened */
dev_dbg(pca9468->dev, "ADC has been completed\n");
handled = true;
}
if (masked_int & PCA9468_BIT_TIMER_INT) {
/* Timer falut interrupt happened */
if (int1[REG_INT1_STS] & PCA9468_BIT_TIMER_STS) {
if (sts[REG_STS_B] & PCA9468_BIT_CHARGE_TIMER_STS) {
/* Charger timer is expired */
dev_err(pca9468->dev, "Charger timer is expired\n");
}
if (sts[REG_STS_B] & PCA9468_BIT_WATCHDOG_TIMER_STS) {
/* Watchdog timer is expired */
dev_err(pca9468->dev, "Watchdog timer is expired\n");
}
}
handled = true;
}
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static int pca9468_irq_init(struct pca9468_charger *pca9468,
struct i2c_client *client)
{
const struct pca9468_platform_data *pdata = pca9468->pdata;
int ret, msk, irq;
pr_debug("%s: =========START=========\n", __func__);
irq = gpio_to_irq(pdata->irq_gpio);
ret = gpio_request_one(pdata->irq_gpio, GPIOF_IN, client->name);
if (ret < 0)
goto fail;
ret = request_threaded_irq(irq, NULL, pca9468_interrupt_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, pca9468);
if (ret < 0)
goto fail_gpio;
/* disable all interrupts by default. */
msk = PCA9468_BIT_V_OK_M |
PCA9468_BIT_NTC_TEMP_M |
PCA9468_BIT_CHG_PHASE_M |
PCA9468_BIT_RESERVED_M |
PCA9468_BIT_CTRL_LIMIT_M |
PCA9468_BIT_TEMP_REG_M |
PCA9468_BIT_ADC_DONE_M |
PCA9468_BIT_TIMER_M;
ret = regmap_write(pca9468->regmap, PCA9468_REG_INT1_MSK, msk);
if (ret < 0)
goto fail_wirte;
client->irq = irq;
return 0;
fail_wirte:
free_irq(irq, pca9468);
fail_gpio:
gpio_free(pdata->irq_gpio);
fail:
client->irq = 0;
return ret;
}
/* Returns the input current limit programmed into the charger in uA. */
int pca9468_input_current_limit(struct pca9468_charger *pca9468)
{
int ret, intval;
unsigned int val;
if (!pca9468->mains_online)
return -ENODATA;
ret = regmap_read(pca9468->regmap, PCA9468_REG_IIN_CTRL, &val);
if (ret < 0)
return ret;
intval = (val & PCA9468_BIT_IIN_CFG) * 100000;
if (intval < 500000)
intval = 500000;
return intval;
}
/*
* Returns the constant charge current programmed
* into the charger in uA.
*/
static int get_const_charge_current(struct pca9468_charger *pca9468)
{
/* Charging current cannot be controlled directly */
return pca9468->cc_max;
}
/*
* Returns the constant charge voltage programmed
* into the charger in uV.
*/
static int get_const_charge_voltage(struct pca9468_charger *pca9468)
{
int ret, intval;
unsigned int val;
if (!pca9468->mains_online)
return -ENODATA;
ret = regmap_read(pca9468->regmap, PCA9468_REG_V_FLOAT, &val);
if (ret < 0)
return ret;
intval = (val * 5 + 3725) * 1000;
return intval;
}
/* Returns the enable or disable value. into 1 or 0. */
static int get_charging_enabled(struct pca9468_charger *pca9468)
{
int ret, intval;
unsigned int val;
ret = regmap_read(pca9468->regmap, PCA9468_REG_START_CTRL, &val);
if (ret < 0)
return ret;
intval = (val & PCA9468_BIT_STANDBY_EN) ? 0 : 1;
return intval;
}
#define get_boot_sec() div_u64(ktime_to_ns(ktime_get_boottime()), NSEC_PER_SEC)
static int set_charging_enabled(struct pca9468_charger *pca9468, int index)
{
if (index < 0 || index >= PPS_INDEX_MAX)
return -EINVAL;
if (index == 0) {
/* this is the same as stop charging */
pca9468->pps_index = 0;
cancel_delayed_work(&pca9468->timer_work);
cancel_delayed_work(&pca9468->pps_work);
/* Stop Direct Charging */
mutex_lock(&pca9468->lock);
pca9468->timer_id = TIMER_ID_NONE;
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
queue_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
/* Start Direct Charging on Index */
pca9468->dc_start_time = get_boot_sec();
pca9468->irdrop_comp_ok = false;
pca9468->pps_index = index;
/* Start 1sec timer for battery check */
mutex_lock(&pca9468->lock);
pca9468->charging_state = DC_STATE_CHECK_VBAT;
pca9468->timer_id = TIMER_VBATMIN_CHECK;
/* PD is alredy in PE_SNK_STATE */
pca9468->timer_period = 0;
mutex_unlock(&pca9468->lock);
queue_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
/* Set the initial charging step */
power_supply_changed(pca9468->mains);
} else {
pr_debug("%s: ping pps_idx=%d charging_state=%d timer_id=%d\n",
__func__, pca9468->pps_index, pca9468->charging_state,
pca9468->timer_id);
}
return 0;
}
static int pca9468_mains_set_property(struct power_supply *psy,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct pca9468_charger *pca9468 = power_supply_get_drvdata(psy);
int ret = 0;
pr_debug("%s: =========START=========\n", __func__);
pr_debug("%s: prop=%d, val=%d\n", __func__, prop, val->intval);
if (!pca9468->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
if (val->intval == 0) {
ret = pca9468_stop_charging(pca9468);
if (ret < 0)
pr_err("%s: cannot stop charging (%d)\n",
__func__, ret);
}
pca9468->mains_online = val->intval;
break;
/* TODO: locking is wrong */
case GBMS_PROP_CHARGING_ENABLED:
ret = set_charging_enabled(pca9468, val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
if (val->intval < 0) {
pr_debug("%s: ignore negative vfloat %d\n",
__func__, val->intval);
break;
}
if (val->intval != pca9468->fv_uv) {
pr_debug("%s: new_vfloat=%u->%d\n", __func__,
pca9468->new_vfloat, val->intval);
pca9468->fv_uv = val->intval;
/* race with pca9468_set_new_vfloat(pca9468) */
pca9468->new_vfloat = val->intval + 50000;
ret = pca9468_set_new_vfloat(pca9468);
}
break;
/*
* pcaA9468 cannot control charging current directly.
* NOTE: using POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX as
* cc_max for battery oc monitoring.
*/
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
if (val->intval < 0) {
pr_debug("%s: ignore negative cc_max %d\n",
__func__, val->intval);
break;
}
if (val->intval != pca9468->cc_max) {
pr_debug("%s: new cc_max=%u->%d\n", __func__,
pca9468->cc_max, val->intval);
pca9468->cc_max = val->intval;
ret = pca9468_set_new_cc_max(pca9468);
}
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (val->intval < 0) {
pr_debug("%s: ignore negative iin %d\n",
__func__, val->intval);
break;
}
if (val->intval != pca9468->new_iin) {
pr_debug("%s: new_iin=%u->%d\n", __func__,
pca9468->new_iin, val->intval);
/* request new input current */
pca9468->new_iin = val->intval;
ret = pca9468_set_new_iin(pca9468);
}
break;
case GBMS_PROP_CHARGE_DISABLE:
break;
default:
ret = -EINVAL;
break;
}
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int pca9468_mains_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct pca9468_charger *pca9468 = power_supply_get_drvdata(psy);
union gbms_charger_state chg_state;
int intval, ret = 0;
if (!pca9468->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = pca9468->mains_online;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = pca9468_is_present(pca9468);
if (val->intval < 0)
val->intval = 0;
break;
case GBMS_PROP_CHARGE_DISABLE:
ret = get_charging_enabled(pca9468);
if (ret < 0)
return ret;
val->intval = !ret;
break;
case GBMS_PROP_CHARGING_ENABLED:
ret = get_charging_enabled(pca9468);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = get_const_charge_voltage(pca9468);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
ret = get_const_charge_current(pca9468);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = pca9468_input_current_limit(pca9468);
if (ret < 0)
return ret;
val->intval = ret;
break;
/* ADCCH_ICHG is dead, this is input current */
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* return the output current - uA unit */
/* check charging status */
if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
/* return invalid */
val->intval = 0;
} else {
int iin;
const int offset = iin_fsw_cfg[pca9468->pdata->fsw_cfg];
/* get input current */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (ret < 0) {
dev_err(pca9468->dev, "Invalid IIN ADC\n");
return ret;
}
/* calculate the output current */
/* Iout = (Iin - Ifsw_cfg)*2 */
val->intval = (iin - offset) * 2;
}
break;
case GBMS_PROP_CHARGE_CHARGER_STATE:
ret = pca9468_get_chg_chgr_state(pca9468, &chg_state);
if (ret < 0)
return ret;
if (pca9468->irdrop_comp_ok)
chg_state.f.flags &= ~GBMS_CS_FLAG_NOCOMP;
gbms_propval_int64val(val) = chg_state.v;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
intval = pca9468_read_adc(pca9468, ADCCH_VOUT);
if (intval < 0)
return intval;
val->intval = intval;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
intval = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (intval < 0)
return intval;
val->intval = intval;
break;
/* TODO: read NTC temperature? */
case POWER_SUPPLY_PROP_TEMP:
val->intval = pca9468_read_adc(pca9468, ADCCH_DIETEMP);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = pca9468_get_charge_type(pca9468);
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = pca9468_get_status(pca9468);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = pca9468_input_current_limit(pca9468);
if (ret < 0)
return ret;
val->intval = ret;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* GBMS not visible
* POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
* POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
* POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
* POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
*/
static enum power_supply_property pca9468_mains_properties[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_TEMP,
/* same as POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT */
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_STATUS,
};
static int pca9468_mains_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_CURRENT_MAX:
case GBMS_PROP_CHARGE_DISABLE:
return 1;
default:
break;
}
return 0;
}
static bool pca9468_is_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PCA9468_REG_DEVICE_INFO ... PCA9468_REG_STS_ADC_9:
case PCA9468_REG_IIN_CTRL ... PCA9468_REG_NTC_TH_2:
case PCA9468_REG_ADC_ACCESS:
case PCA9468_REG_ADC_ADJUST:
case PCA9468_REG_ADC_IMPROVE:
case PCA9468_REG_ADC_MODE:
case 0x40 ... 0x4f: /* debug */
return true;
default:
break;
}
return false;
}
static const struct regmap_config pca9468_regmap = {
.name = "pca9468-mains",
.reg_bits = 8,
.val_bits = 8,
.max_register = PCA9468_MAX_REGISTER,
.readable_reg = pca9468_is_reg,
.volatile_reg = pca9468_is_reg,
};
static const struct power_supply_desc pca9468_mains_desc = {
.name = "pca9468-mains",
/* b/179246019 will not look online to Android */
.type = POWER_SUPPLY_TYPE_UNKNOWN,
.get_property = pca9468_mains_get_property,
.set_property = pca9468_mains_set_property,
.properties = pca9468_mains_properties,
.property_is_writeable = pca9468_mains_is_writeable,
.num_properties = ARRAY_SIZE(pca9468_mains_properties),
};
#if defined(CONFIG_OF)
static int of_pca9468_dt(struct device *dev,
struct pca9468_platform_data *pdata)
{
struct device_node *np_pca9468 = dev->of_node;
int ret;
if(!np_pca9468)
return -EINVAL;
/* irq gpio */
pdata->irq_gpio = of_get_named_gpio(np_pca9468, "pca9468,irq-gpio", 0);
pr_info("%s: irq-gpio: %d \n", __func__, pdata->irq_gpio);
/* input current limit */
ret = of_property_read_u32(np_pca9468, "pca9468,input-current-limit",
&pdata->iin_cfg);
if (ret) {
pr_warn("%s: pca9468,input-current-limit is Empty\n", __func__);
pdata->iin_cfg = PCA9468_IIN_CFG_DFT;
}
pr_info("%s: pca9468,iin_cfg is %u\n", __func__, pdata->iin_cfg);
/* charging current */
ret = of_property_read_u32(np_pca9468, "pca9468,charging-current",
&pdata->ichg_cfg);
if (ret) {
pr_warn("%s: pca9468,charging-current is Empty\n", __func__);
pdata->ichg_cfg = PCA9468_ICHG_CFG_DFT;
}
pr_info("%s: pca9468,ichg_cfg is %u\n", __func__, pdata->ichg_cfg);
/* charging float voltage */
ret = of_property_read_u32(np_pca9468, "pca9468,float-voltage",
&pdata->v_float);
if (ret) {
pr_warn("%s: pca9468,float-voltage is Empty\n", __func__);
pdata->v_float = PCA9468_VFLOAT_DFT;
}
pr_info("%s: pca9468,v_float is %u\n", __func__, pdata->v_float);
/* input topoff current */
ret = of_property_read_u32(np_pca9468, "pca9468,input-itopoff",
&pdata->iin_topoff);
if (ret) {
pr_warn("%s: pca9468,input-itopoff is Empty\n", __func__);
pdata->iin_topoff = PCA9468_IIN_DONE_DFT;
}
pr_info("%s: pca9468,iin_topoff is %u\n", __func__, pdata->iin_topoff);
/* switching frequency */
ret = of_property_read_u32(np_pca9468, "pca9468,switching-frequency",
&pdata->fsw_cfg);
if (ret) {
pr_warn("%s: pca9468,switching frequency is Empty\n", __func__);
pdata->fsw_cfg = PCA9468_FSW_CFG_DFT;
}
pr_info("%s: pca9468,fsw_cfg is %u\n", __func__, pdata->fsw_cfg);
/* NTC threshold voltage */
ret = of_property_read_u32(np_pca9468, "pca9468,ntc-threshold",
&pdata->ntc_th);
if (ret) {
pr_warn("%s: pca9468,ntc threshold voltage is Empty\n",
__func__);
pdata->ntc_th = PCA9468_NTC_TH_DFT;
}
pr_info("%s: pca9468,ntc_th is %u\n", __func__, pdata->ntc_th);
/* Charging mode */
ret = of_property_read_u32(np_pca9468, "pca9468,chg-mode",
&pdata->chg_mode);
if (ret) {
pr_info("%s: pca9468,charging mode is Empty\n", __func__);
pdata->chg_mode = CHG_2TO1_DC_MODE;
}
pr_info("%s: pca9468,chg_mode is %u\n", __func__, pdata->chg_mode);
#ifdef CONFIG_THERMAL
/* USBC thermal zone */
ret = of_property_read_string(np_pca9468, "google,usb-port-tz-name",
&pdata->usb_tz_name);
if (ret) {
pr_info("%s: google,usb-port-tz-name is Empty\n", __func__);
pdata->usb_tz_name = NULL;
} else {
pr_info("%s: google,usb-port-tz-name is %s\n", __func__,
pdata->usb_tz_name);
}
#endif
return 0;
}
#else
static int of_pca9468_dt(struct device *dev,
struct pca9468_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
#ifdef CONFIG_THERMAL
static int pca9468_usb_tz_read_temp(struct thermal_zone_device *tzd, int *temp)
{
struct pca9468_charger *pca9468 = tzd->devdata;
if (!pca9468)
return -ENODEV;
*temp = pca9468_read_adc(pca9468, ADCCH_NTC);
return 0;
}
static struct thermal_zone_device_ops pca9468_usb_tzd_ops = {
.get_temp = pca9468_usb_tz_read_temp,
};
#endif
static int read_reg(void *data, u64 *val)
{
struct pca9468_charger *chip = data;
int rc;
unsigned int temp;
rc = regmap_read(chip->regmap, chip->debug_address, &temp);
if (rc) {
pr_err("Couldn't read reg %x rc = %d\n",
chip->debug_address, rc);
return -EAGAIN;
}
*val = temp;
return 0;
}
static int write_reg(void *data, u64 val)
{
struct pca9468_charger *chip = data;
int rc;
u8 temp;
temp = (u8) val;
rc = regmap_write(chip->regmap, chip->debug_address, temp);
if (rc) {
pr_err("Couldn't write 0x%02x to 0x%02x rc = %d\n",
temp, chip->debug_address, rc);
return -EAGAIN;
}
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(register_debug_ops, read_reg, write_reg, "0x%02llx\n");
static int debug_adc_chan_get(void *data, u64 *val)
{
struct pca9468_charger *pca9468 = data;
*val = pca9468_read_adc(data, pca9468->debug_adc_channel);
return 0;
}
static int debug_adc_chan_set(void *data, u64 val)
{
struct pca9468_charger *pca9468 = data;
if (val < ADCCH_VOUT || val >= ADCCH_MAX)
return -EINVAL;
pca9468->debug_adc_channel = val;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_adc_chan_ops, debug_adc_chan_get,
debug_adc_chan_set, "%llu\n");
static int debug_pps_index_get(void *data, u64 *val)
{
struct pca9468_charger *pca9468 = data;
*val = pca9468->pps_index;
return 0;
}
static int debug_pps_index_set(void *data, u64 val)
{
struct pca9468_charger *pca9468 = data;
return set_charging_enabled(pca9468, (int)val);
}
DEFINE_SIMPLE_ATTRIBUTE(debug_pps_index_ops, debug_pps_index_get,
debug_pps_index_set, "%llu\n");
static int pca9468_create_debugfs_entries(struct pca9468_charger *chip)
{
struct dentry *ent;
chip->debug_root = debugfs_create_dir("charger-pca9468", NULL);
if (IS_ERR_OR_NULL(chip->debug_root)) {
dev_err(chip->dev, "Couldn't create debug dir\n");
return -ENOENT;
}
debugfs_create_x32("address", 0644, chip->debug_root,
&chip->debug_address);
ent = debugfs_create_file("data", 0644, chip->debug_root, chip,
&register_debug_ops);
if (!ent)
dev_err(chip->dev, "Couldn't create data debug file\n");
chip->debug_adc_channel = ADCCH_VOUT;
ent = debugfs_create_file("adc_chan", 0644, chip->debug_root, chip,
&debug_adc_chan_ops);
if (!ent)
dev_err(chip->dev, "Couldn't create data debug file\n");
ent = debugfs_create_file("pps_index", 0644, chip->debug_root, chip,
&debug_pps_index_ops);
if (!ent)
dev_err(chip->dev, "Couldn't create pps_index debug file\n");
debugfs_create_bool("irdrop_comp", 0644, chip->debug_root,
&chip->irdrop_comp_ok);
return 0;
}
static int pca9468_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
static char *battery[] = { "pca9468-battery" };
struct power_supply_config mains_cfg = {};
struct pca9468_platform_data *pdata;
struct pca9468_charger *pca9468_chg;
struct device *dev = &client->dev;
int ret;
pr_debug("%s: =========START=========\n", __func__);
pca9468_chg = devm_kzalloc(dev, sizeof(*pca9468_chg), GFP_KERNEL);
if (!pca9468_chg)
return -ENOMEM;
#if defined(CONFIG_OF)
if (client->dev.of_node) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct pca9468_platform_data),
GFP_KERNEL);
if (!pdata) {
dev_err(&client->dev, "Failed to allocate memory \n");
return -ENOMEM;
}
ret = of_pca9468_dt(&client->dev, pdata);
if (ret < 0){
dev_err(&client->dev, "Failed to get device of_node \n");
return -ENOMEM;
}
client->dev.platform_data = pdata;
} else {
pdata = client->dev.platform_data;
}
#else
pdata = dev->platform_data;
#endif
if (!pdata)
return -EINVAL;
i2c_set_clientdata(client, pca9468_chg);
mutex_init(&pca9468_chg->lock);
pca9468_chg->dev = &client->dev;
pca9468_chg->pdata = pdata;
pca9468_chg->charging_state = DC_STATE_NO_CHARGING;
/* Create a work queue for the direct charger */
pca9468_chg->dc_wq = alloc_ordered_workqueue("pca9468_dc_wq",
WQ_MEM_RECLAIM);
if (pca9468_chg->dc_wq == NULL) {
dev_err(pca9468_chg->dev, "failed to create work queue\n");
return -ENOMEM;
}
pca9468_chg->monitor_wake_lock =
wakeup_source_register(NULL, "pca9468-charger-monitor");
if (!pca9468_chg->monitor_wake_lock) {
pr_err("Failed to register wakeup source\n");
return -ENODEV;
}
/* initialize work */
INIT_DELAYED_WORK(&pca9468_chg->timer_work, pca9468_timer_work);
pca9468_chg->timer_id = TIMER_ID_NONE;
pca9468_chg->timer_period = 0;
INIT_DELAYED_WORK(&pca9468_chg->pps_work, pca9468_pps_request_work);
pca9468_chg->regmap = devm_regmap_init_i2c(client, &pca9468_regmap);
if (IS_ERR(pca9468_chg->regmap)) {
ret = -EINVAL;
goto error;
}
ret = pca9468_probe_pps(pca9468_chg);
if (ret < 0)
pr_warn("pca9468: PPS not available (%d)\n", ret);
ret = pca9468_hw_init(pca9468_chg);
if (ret < 0)
goto error;
mains_cfg.supplied_to = battery;
mains_cfg.num_supplicants = ARRAY_SIZE(battery);
mains_cfg.drv_data = pca9468_chg;
pca9468_chg->mains = devm_power_supply_register(dev,
&pca9468_mains_desc,
&mains_cfg);
if (IS_ERR(pca9468_chg->mains)) {
ret = -ENODEV;
goto error;
}
/* Interrupt pin is optional. */
if (pdata->irq_gpio >= 0) {
ret = pca9468_irq_init(pca9468_chg, client);
if (ret < 0) {
dev_warn(dev, "failed to initialize IRQ: %d\n", ret);
dev_warn(dev, "disabling IRQ support\n");
}
/* disable interrupt */
disable_irq(client->irq);
}
ret = pca9468_create_debugfs_entries(pca9468_chg);
if (ret < 0)
dev_err(dev, "error while registering debugfs %d\n", ret);
#ifdef CONFIG_DC_STEP_CHARGING
ret = pca9468_step_chg_init(pca9468_chg->dev);
if (ret < 0) {
dev_err(dev, "Couldn't init pca9468_step_chg_init ret=%d\n",
ret);
goto error;
}
#endif
#ifdef CONFIG_THERMAL
if (pdata->usb_tz_name) {
pca9468_chg->usb_tzd =
thermal_zone_device_register(pdata->usb_tz_name, 0, 0,
pca9468_chg,
&pca9468_usb_tzd_ops,
NULL, 0, 0);
if (IS_ERR(pca9468_chg->usb_tzd)) {
pca9468_chg->usb_tzd = NULL;
ret = PTR_ERR(pca9468_chg->usb_tzd);
dev_err(dev, "Couldn't register usb connector thermal zone ret=%d\n",
ret);
}
}
#endif
pca9468_chg->init_done = true;
pr_info("pca9468: probe_done\n");
pr_debug("%s: =========END=========\n", __func__);
return 0;
error:
destroy_workqueue(pca9468_chg->dc_wq);
mutex_destroy(&pca9468_chg->lock);
wakeup_source_unregister(pca9468_chg->monitor_wake_lock);
return ret;
}
static int pca9468_remove(struct i2c_client *client)
{
struct pca9468_charger *pca9468_chg = i2c_get_clientdata(client);
/* stop charging if it is active */
pca9468_stop_charging(pca9468_chg);
if (client->irq) {
free_irq(client->irq, pca9468_chg);
gpio_free(pca9468_chg->pdata->irq_gpio);
}
/* Delete the work queue */
destroy_workqueue(pca9468_chg->dc_wq);
wakeup_source_unregister(pca9468_chg->monitor_wake_lock);
#ifdef CONFIG_DC_STEP_CHARGING
pca9468_step_chg_deinit();
#endif
#ifdef CONFIG_THERMAL
if (pca9468_chg->usb_tzd)
thermal_zone_device_unregister(pca9468_chg->usb_tzd);
#endif
return 0;
}
static const struct i2c_device_id pca9468_id[] = {
{ "pca9468", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca9468_id);
#if defined(CONFIG_OF)
static struct of_device_id pca9468_i2c_dt_ids[] = {
{ .compatible = "nxp,pca9468" },
{ },
};
MODULE_DEVICE_TABLE(of, pca9468_i2c_dt_ids);
#endif /* CONFIG_OF */
#if defined(CONFIG_PM)
#ifdef CONFIG_RTC_HCTOSYS
static int get_current_time(unsigned long *now_tm_sec)
{
struct rtc_time tm;
struct rtc_device *rtc;
int rc;
rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
if (rtc == NULL) {
pr_err("%s: unable to open rtc device (%s)\n",
__FILE__, CONFIG_RTC_HCTOSYS_DEVICE);
return -EINVAL;
}
rc = rtc_read_time(rtc, &tm);
if (rc) {
pr_err("Error reading rtc device (%s) : %d\n",
CONFIG_RTC_HCTOSYS_DEVICE, rc);
goto close_time;
}
rc = rtc_valid_tm(&tm);
if (rc) {
pr_err("Invalid RTC time (%s): %d\n",
CONFIG_RTC_HCTOSYS_DEVICE, rc);
goto close_time;
}
*now_tm_sec = rtc_tm_to_time64(&tm);
close_time:
rtc_class_close(rtc);
return rc;
}
static void
pca9468_check_and_update_charging_timer(struct pca9468_charger *pca9468)
{
unsigned long current_time = 0, next_update_time, time_left;
get_current_time(&current_time);
if (pca9468->timer_id != TIMER_ID_NONE) {
next_update_time = pca9468->last_update_time +
(pca9468->timer_period / 1000); /* seconds */
pr_debug("%s: current_time=%ld, next_update_time=%ld\n",
__func__, current_time, next_update_time);
if (next_update_time > current_time)
time_left = next_update_time - current_time;
else
time_left = 0;
mutex_lock(&pca9468->lock);
pca9468->timer_period = time_left * 1000; /* ms unit */
mutex_unlock(&pca9468->lock);
schedule_delayed_work(&pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
pr_debug("%s: timer_id=%d, time_period=%ld\n", __func__,
pca9468->timer_id, pca9468->timer_period);
}
pca9468->last_update_time = current_time;
}
#endif
static int pca9468_suspend(struct device *dev)
{
struct pca9468_charger *pca9468 = dev_get_drvdata(dev);
pr_debug("%s: cancel delayed work\n", __func__);
/* cancel delayed_work */
cancel_delayed_work(&pca9468->timer_work);
return 0;
}
static int pca9468_resume(struct device *dev)
{
struct pca9468_charger *pca9468 = dev_get_drvdata(dev);
pr_debug("%s: update_timer\n", __func__);
/* Update the current timer */
#ifdef CONFIG_RTC_HCTOSYS
pca9468_check_and_update_charging_timer(pca9468);
#else
if (pca9468->timer_id != TIMER_ID_NONE) {
mutex_lock(&pca9468->lock);
pca9468->timer_period = 0; /* ms unit */
mutex_unlock(&pca9468->lock);
schedule_delayed_work(&pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
}
#endif
return 0;
}
#else
#define pca9468_suspend NULL
#define pca9468_resume NULL
#endif
const struct dev_pm_ops pca9468_pm_ops = {
.suspend = pca9468_suspend,
.resume = pca9468_resume,
};
static struct i2c_driver pca9468_driver = {
.driver = {
.name = "pca9468",
#if defined(CONFIG_OF)
.of_match_table = pca9468_i2c_dt_ids,
#endif /* CONFIG_OF */
#if defined(CONFIG_PM)
.pm = &pca9468_pm_ops,
#endif
},
.probe = pca9468_probe,
.remove = pca9468_remove,
.id_table = pca9468_id,
};
module_i2c_driver(pca9468_driver);
MODULE_AUTHOR("Clark Kim <[email protected]>");
MODULE_AUTHOR("AleX Pelosi <[email protected]>");
MODULE_DESCRIPTION("PCA9468 charger driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("3.7.0");