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android / kernel / google-modules / bms / refs/heads/android-gs-raviole-5.10-android13 / . / pca9468_charger.c
blob: c8632c9aaeefefecdd2e3d394d8851101025fcdb [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 PCA9468_ENABLE_DELAY_T 150 /* 150ms */
#define PCA9468_CVMODE_CHECK2_T 1000 /* 1000ms */
#define PCA9468_ENABLE_WLC_DELAY_T 300 /* 300ms */
/* Battery Threshold */
#define PCA9468_DC_VBAT_MIN 3400000 /* uV */
/* Input Current Limit default value */
#define PCA9468_IIN_CFG_DFT 2500000 /* 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 */
/* Charging Float Voltage max voltage for comp */
#define PCA9468_COMP_VFLOAT_MAX 4450000 /* uV */
/* 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_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, set to max(cc_max) / 2 */
#define PCA9468_TA_MAX_CUR 2600000 /* 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 50000 /* 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 */
/* Offset for cc_max / 2 */
#define PCA9468_IIN_MAX_OFFSET 0
/* 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 */
#define PCA9468_OTV_MARGIN 12000 /* uV */
/* irdrop default limit */
#define PCA9468_IRDROP_LIMIT_CNT 3 /* tiers */
#define PCA9468_IRDROP_LIMIT_TIER1 105000 /* uV */
#define PCA9468_IRDROP_LIMIT_TIER2 75000 /* uV */
#define PCA9468_IRDROP_LIMIT_TIER3 0 /* uV */
/* Spread Spectrum default settings */
#define PCA9468_SC_CLK_DITHER_RATE_DEF 0 /* 25kHz */
#define PCA9468_SC_CLK_DITHER_LIMIT_DEF 0xF /* 10% */
/* 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
};
/* Status */
enum {
STS_MODE_CHG_LOOP, /* TODO: There is no such thing */
STS_MODE_VFLT_LOOP,
STS_MODE_IIN_LOOP,
STS_MODE_LOOP_INACTIVE,
STS_MODE_CHG_DONE,
STS_MODE_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, /* 8 */
TIMER_PDMSG_SEND, /* 9 */
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;
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;
}
/* v float voltage (5 mV) resolution */
static int pca9468_set_vfloat(struct pca9468_charger *pca9468,
unsigned int v_float)
{
const int val = PCA9468_V_FLOAT(v_float);
int ret;
ret = regmap_write(pca9468->regmap, PCA9468_REG_V_FLOAT, val);
dev_info(pca9468->dev, "%s: v_float=%u (%d)\n", __func__, v_float, ret);
return ret;
}
static int pca9468_set_input_current(struct pca9468_charger *pca9468,
unsigned int iin)
{
int ret, val;
/* 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);
dev_info(pca9468->dev, "%s: iin=%d real iin_cfg=%d (%d)\n", __func__,
iin, val * PCA9468_IIN_CFG_STEP, ret);
return ret;
}
/* Returns the enable or disable value. into 1 or 0. */
static int pca9468_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;
}
/* b/194346461 ramp down IIN */
static int pca9468_wlc_ramp_down_iin(struct pca9468_charger *pca9468,
struct power_supply *wlc_psy)
{
const int ramp_down_step = PCA9468_IIN_CFG_STEP;
int ret = 0, iin;
if (!pca9468->wlc_ramp_out_iin)
return 0;
iin = pca9468_input_current_limit(pca9468);
for ( ; iin >= PCA9468_IIN_CFG_MIN; iin -= ramp_down_step) {
int iin_adc, wlc_iout = -1;
iin_adc = pca9468_read_adc(pca9468, ADCCH_IIN);
if (wlc_psy) {
union power_supply_propval pro_val;
ret = power_supply_get_property(wlc_psy,
POWER_SUPPLY_PROP_ONLINE,
&pro_val);
if (ret < 0 || pro_val.intval != PPS_PSY_PROG_ONLINE)
break;
ret = power_supply_get_property(wlc_psy,
POWER_SUPPLY_PROP_CURRENT_NOW,
&pro_val);
if (ret == 0)
wlc_iout = pro_val.intval;
}
ret = pca9468_set_input_current(pca9468, iin);
if (ret < 0) {
pr_err("%s: ramp down iin=%d (%d)\n", __func__,
iin, ret);
break;
}
pr_debug("%s: iin_adc=%d, wlc_iout-%d ramp down iin=%d\n",
__func__, iin_adc, wlc_iout, iin);
msleep(pca9468->wlc_ramp_out_delay);
}
return ret;
}
/* b/194346461 ramp down VOUT */
#define WLC_VOUT_CFG_STEP 40000
/* the caller will set to vbatt * 4 */
static int pca9468_wlc_ramp_down_vout(struct pca9468_charger *pca9468,
struct power_supply *wlc_psy)
{
const int ramp_down_step = WLC_VOUT_CFG_STEP;
union power_supply_propval pro_val;
int vout = 0, vout_target = pca9468->wlc_ramp_out_vout_target;
int ret, vbatt;
while (true) {
vbatt = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbatt <= 0) {
pr_err("%s: invalid vbatt %d\n", __func__, vbatt);
break;
}
ret = power_supply_get_property(wlc_psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&pro_val);
if (ret < 0) {
pr_err("%s: invalid vout %d\n", __func__, ret);
break;
}
if (!pca9468->wlc_ramp_out_vout_target)
vout_target = vbatt * 4;
if (!vout)
vout = pro_val.intval;
if (vout < vout_target) {
pr_debug("%s: underflow vout=%d, vbatt=%d (target=%d)\n", __func__,
vout, vbatt, vout_target);
return 0;
}
pro_val.intval = vout - ramp_down_step;
pr_debug("%s: vbatt=%d, wlc_vout=%d->%d\n", __func__, vbatt,
vout, pro_val.intval);
ret = power_supply_set_property(wlc_psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&pro_val);
if (ret < 0) {
pr_err("%s: cannot set vout %d\n", __func__, ret);
break;
}
msleep(pca9468->wlc_ramp_out_delay);
vout = pro_val.intval;
}
return -EIO;
}
/* call holding mutex_lock(&pca9468->lock); */
static int pca9468_set_charging(struct pca9468_charger *pca9468, bool enable)
{
const int ntc_protection_en = 0; /* TODO: DT option? */
int ret, val;
pr_debug("%s: enable=%d ta_type=%d\n", __func__, enable, pca9468->ta_type);
if (enable && pca9468_get_charging_enabled(pca9468) == enable) {
pr_debug("%s: no op, already enabled\n", __func__);
return 0;
}
/* might needs to disable NTC_PROTECTION_EN in all cases */
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);
}
if (enable) {
/* ENABLE PCA9468 */
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
PCA9468_BIT_STANDBY_EN,
PCA9468_STANDBY_DONOT);
if (ret < 0)
goto error;
/* 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);
/* Restore NTC_PROTECTION_EN */
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_TEMP_CTRL,
PCA9468_BIT_NTC_PROTECTION_EN,
ntc_protection_en);
} else {
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
struct power_supply *wlc_psy;
int ret;
wlc_psy = pca9468_get_rx_psy(pca9468);
if (wlc_psy) {
ret = pca9468_wlc_ramp_down_iin(pca9468, wlc_psy);
if (ret < 0)
dev_err(pca9468->dev, "cannot ramp out iin (%d)\n", ret);
ret = pca9468_wlc_ramp_down_vout(pca9468, wlc_psy);
if (ret < 0)
dev_err(pca9468->dev, "cannot ramp out vout (%d)\n", ret);
}
}
/* turn off the PCA */
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_START_CTRL,
PCA9468_BIT_STANDBY_EN,
PCA9468_STANDBY_FORCED);
if (ret < 0)
goto error;
/* 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 loglevel)
{
int ret;
/* Dump register */
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_INT1,
&val[PCA9468_REG_INT1], 7);
if (ret < 0)
return ret;
logbuffer_prlog(pca9468, loglevel,
"%s: Error reg[1]=%#x,[2]=%#x,[3]=%#x,[4]=%#x,[5]=%#x,[6]=%#x,[7]=%#x",
__func__, val[1], val[2], val[3], val[4], val[5], val[6], val[7]);
return 0;
}
static void pca9468_dump_test_debug(const struct pca9468_charger *pca9468,
int loglevel)
{
u8 test_val[16];
int ret;
/* Read test register for debugging */
ret = regmap_bulk_read(pca9468->regmap, 0x40, test_val, 16);
if (ret < 0) {
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: cannot read test registers (%d)\n",
__func__, ret);
} else {
logbuffer_prlog(pca9468, loglevel,
"%s: Error reg[0x40]=%#x,[0x41]=%#x,[0x42]=%#x,[0x43]=%#x,[0x44]=%#x,[0x45]=%#x,[0x46]=%#x,[0x47]=%#x",
__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]);
logbuffer_prlog(pca9468, loglevel,
"%s: Error reg[0x48]=%#x,[0x49]=%#x,[0x4A]=%#x,[0x4B]=%#x,[0x4C]=%#x,[0x4D]=%#x,[0x4E]=%#x,[0x4F]=%#x",
__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]);
}
}
static void pca9468_dump_config(const struct pca9468_charger *pca9468,
int loglevel)
{
u8 val[10];
int ret;
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_IIN_CTRL,
val, sizeof(val));
if (ret < 0) {
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: cannot read config (%d)\n", __func__, ret);
} else {
logbuffer_prlog(pca9468, loglevel,
"%s: Config reg[0x21]=%#x,[0x22]=%#x,[0x23]=%#x,[0x24]=%#x,[0x25]=%#x,[0x26]=%#x,[0x27]=%#x,[0x28]=%#x,[0x29]=%#x,[0x2A]=%#x",
__func__, val[0], val[1], val[2], val[3], val[4],
val[5], val[6], val[7], val[8], val[9]);
}
}
/* 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, LOGLEVEL_WARNING);
if (ret < 0) {
pr_err("%s: cannot read state\n", __func__);
return ret;
}
pca9468_dump_test_debug(pca9468, LOGLEVEL_ERR);
/* Check INT1_STS first */
if ((val[PCA9468_REG_INT1_STS] & PCA9468_BIT_V_OK_STS) != PCA9468_BIT_V_OK_STS) {
/* VBUS is invalid */
logbuffer_prlog(pca9468, LOGLEVEL_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)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: Flying Cap is shorted to GND", __func__);
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VOUT_UV_STS)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: VOUT UV", __func__); /* VOUT < VOUT_OK */
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VBAT_OV_STS)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: VBAT OV", __func__); /* VBAT > VBAT_OV */
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VIN_OV_STS)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: VIN OV", __func__); /* VIN > V_OV_FIXED */
else if (val[PCA9468_REG_STS_A] & PCA9468_BIT_VIN_UV_STS)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: VIN UV", __func__); /* VIN < V_UVTH */
else
logbuffer_prlog(pca9468, LOGLEVEL_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 */
logbuffer_prlog(pca9468, LOGLEVEL_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)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: IIN is over OCP_FAST", __func__);
else if (val[PCA9468_REG_STS_B] & PCA9468_BIT_OCP_AVG_STS)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: IIN is over OCP_AVG", __func__);
else
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: No Loop active", __func__);
return -EINVAL;
}
if (val[PCA9468_REG_INT1_STS] & PCA9468_BIT_TEMP_REG_STS) {
/* Over temperature protection */
logbuffer_prlog(pca9468, LOGLEVEL_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)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: Charger timer is expired", __func__);
else if (sts_b & PCA9468_BIT_WATCHDOG_TIMER_STS)
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: Watchdog timer is expired", __func__);
else
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: Timer INT, but no timer STS", __func__);
return -EINVAL;
}
if (val[PCA9468_REG_STS_A] & PCA9468_BIT_CFLY_SHORT_STS) {
logbuffer_prlog(pca9468, LOGLEVEL_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];
/* re-read the state register */
ret = regmap_read(pca9468->regmap, PCA9468_REG_STS_B, &reg_val);
if (ret < 0)
return -EIO;
pr_debug("%s: RCP check, STS_B=%#x\n", __func__, reg_val);
/* RCP condition, but VIN is valid and the PCA is active */
if (reg_val & PCA9468_BIT_ACTIVE_STATE_STS) {
const int charging_state = pca9468->charging_state;
/*
* Try again when called from pca9468_check_active_state().
* If VIN is increased, input current will increase over
* IIN_LOW level.
*/
logbuffer_prlog(pca9468, charging_state == DC_STATE_CHECK_ACTIVE ?
LOGLEVEL_WARNING : LOGLEVEL_ERR,
"%s: RCP triggered but VIN is valid, state=%d",
__func__, charging_state);
pca9468->chg_data.rcp_count++;
return -EAGAIN;
}
/* re-read and dump state, debug registers */
pca9468_check_state(val, pca9468, LOGLEVEL_INFO);
ret = regmap_bulk_read(pca9468->regmap, 0x48, val, 3);
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: Error reg[0x48]=%#x,[0x49]=%#x,[0x4a]=%#x",
__func__, val[0], val[1], val[2]);
pca9468_dump_config(pca9468, LOGLEVEL_INFO);
/* Not in RCP state, retry only when DC is starting */
if (reg_val & PCA9468_BIT_STANDBY_STATE_STS) {
logbuffer_prlog(pca9468, LOGLEVEL_WARNING, "%s: device in standby", __func__);
pca9468->chg_data.stby_count++;
ret = -EAGAIN;
} else {
logbuffer_prlog(pca9468, LOGLEVEL_ERR, "%s: device in shutdown", __func__);
p9468_chg_stats_update_flags(&pca9468->chg_data, P9468_CHGS_F_SHDN);
ret = -EINVAL;
}
return ret;
}
/*
* Check Active status, 0 is active (or in RCP), <0 indicates a problem.
* The function is called from different contexts/functions, errors are fatal
* (i.e. stop charging) from all contexts except when this is called from
* pca9468_check_active_state().
*
* Other contexts:
* . pca9468_charge_adjust_ccmode
* . pca9468_charge_ccmode
* . pca9468_charge_start_cvmode
* . pca9468_charge_cvmode
*
* call holding mutex_lock(&pca9468->lock)
*/
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\n",
__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 ok=%d (ret=%d)\n", __func__,
ret == 0, ret);
return ret;
}
/* not in error but in standby or shutdown */
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 if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
/*
* 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
*/
pr_err("%s: other driver forced stop\n", __func__);
ret = -EINVAL;
} else {
/* Check the RCP condition, T_REVI_DET is 300ms */
msleep(200);
/*
* return 0 if VIN is still present, -EAGAIN if needs to retry,
* -EINVAL on error.
*/
ret = pca9468_check_standby(pca9468);
}
error:
pr_debug("%s: Not Active Status=%d\n", __func__, ret);
return ret;
}
static int pca9468_get_iin(struct pca9468_charger *pca9468, int *iin)
{
const int offset = iin_fsw_cfg[pca9468->pdata->fsw_cfg];
int temp;
temp = pca9468_read_adc(pca9468, ADCCH_IIN);
if (temp < 0)
return temp;
if (temp < offset)
temp = offset;
*iin = (temp - offset) * 2;
return 0;
}
/* only needed for irdrop compensation ane maybe not even that... */
static int pca9468_get_batt_info(struct pca9468_charger *pca9468, int info_type, int *info)
{
union power_supply_propval val;
enum power_supply_property psp;
int ret;
if (!pca9468->batt_psy)
pca9468->batt_psy = power_supply_get_by_name("battery");
if (!pca9468->batt_psy)
return -EINVAL;
if (info_type == BATT_CURRENT)
psp = POWER_SUPPLY_PROP_CURRENT_NOW;
else
psp = POWER_SUPPLY_PROP_VOLTAGE_NOW;
ret = power_supply_get_property(pca9468->batt_psy, psp, &val);
if (ret == 0)
*info = val.intval;
return ret;
}
/* only needed for irdrop compensation ane maybe not even that... */
static int pca9468_get_ibatt(struct pca9468_charger *pca9468, int *info)
{
return pca9468_get_batt_info(pca9468, BATT_CURRENT, info);
}
static void pca9468_prlog_state(struct pca9468_charger *pca9468, const char *fn)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=%d, icn=%d ibat=%d, cc_max=%d rc=%d",
fn, iin, pca9468->iin_cc, icn, ibat, pca9468->cc_max, rc);
}
static int pca9468_read_status(struct pca9468_charger *pca9468)
{
unsigned int reg_val;
int ret;
/* Read STS_A */
ret = regmap_read(pca9468->regmap, PCA9468_REG_STS_A, &reg_val);
if (ret < 0)
return ret;
if (reg_val & PCA9468_BIT_VIN_UV_STS) {
ret = STS_MODE_VIN_UVLO;
} else if (reg_val & PCA9468_BIT_IIN_LOOP_STS) {
ret = STS_MODE_IIN_LOOP;
} else if (reg_val & PCA9468_BIT_CHG_LOOP_STS) {
ret = STS_MODE_CHG_LOOP; /* never */
} else if (reg_val & PCA9468_BIT_VFLT_LOOP_STS) {
ret = STS_MODE_VFLT_LOOP;
} else {
ret = STS_MODE_LOOP_INACTIVE; /* lower IIN or TA to enter CC? */
}
return ret;
}
/*
* TODO: add formula and/or use device tree entries to configure. Can use
* delta = PCA9468_COMP_VFLOAT_MAX to reduce the limit as float voltage
* increases.
* NOTE: how does this change with temperature, battery age?
*/
static int pca9468_irdrop_limit(struct pca9468_charger *pca9468, int fv_uv)
{
int delta = pca9468->pdata->irdrop_limits[1];
if (fv_uv < 4300000)
delta = pca9468->pdata->irdrop_limits[0];
if (fv_uv >= PCA9468_COMP_VFLOAT_MAX)
delta = pca9468->pdata->irdrop_limits[2];
return delta;
}
/* use max limit, */
static int pca9468_apply_irdrop(struct pca9468_charger *pca9468, int fv_uv)
{
const int delta_limit = pca9468_irdrop_limit(pca9468, fv_uv);
int ret, vbat, pca_vbat = 0, delta = 0;
const bool adaptive = false;
/* use classic irdrop */
if (pca9468->irdrop_comp_ok)
goto error_done;
ret = pca9468_get_batt_info(pca9468, BATT_VOLTAGE, &vbat);
if (ret < 0)
goto error_done;
pca_vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (pca_vbat < 0 || pca_vbat < vbat)
goto error_done;
if (adaptive) {
delta = pca_vbat - vbat;
if (delta > delta_limit)
delta = delta_limit;
} else {
delta = delta_limit;
}
if (fv_uv + delta > PCA9468_COMP_VFLOAT_MAX)
delta = PCA9468_COMP_VFLOAT_MAX - fv_uv;
error_done:
pr_debug("%s: fv_uv=%d->%d pca_vbat=%d, vbat=%d delta_v=%d\n",
__func__, fv_uv, fv_uv + delta, pca_vbat,
ret < 0 ? ret : vbat, delta);
if (fv_uv + delta < pca_vbat) {
pr_err("%s: fv_uv=%d, comp_fv_uv=%d is lower than VBAT=%d\n",
__func__, fv_uv, fv_uv + delta, pca_vbat);
return -EINVAL;
}
return fv_uv + delta;
}
static int pca9468_const_charge_voltage(struct pca9468_charger *pca9468);
/* irdrop compensation for the pca9468 V_FLOAT, will only raise it */
static int pca9468_comp_irdrop(struct pca9468_charger *pca9468)
{
int ret = 0, v_float, fv_uv;
v_float = pca9468_const_charge_voltage(pca9468);
if (v_float < 0)
return -EIO;
fv_uv = pca9468_apply_irdrop(pca9468, pca9468->fv_uv);
if (fv_uv < 0)
return -EIO;
/* do not back down */
if (fv_uv > v_float) {
ret = pca9468_set_vfloat(pca9468, fv_uv);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: v_float=%u->%u (%d)", __func__,
v_float, fv_uv, ret);
}
return ret;
}
static int pca9468_check_status(struct pca9468_charger *pca9468)
{
int icn = -EINVAL, ibat = -EINVAL, vbat = -EINVAL;
int rc, status;
status = pca9468_read_status(pca9468);
if (status < 0)
goto error;
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
rc = pca9468_get_batt_info(pca9468, BATT_CURRENT, &ibat);
if (rc == 0)
rc = pca9468_get_batt_info(pca9468, BATT_VOLTAGE, &vbat);
error:
pr_debug("%s: status=%d icn:%d ibat:%d delta_c=%d, vbat:%d, fv:%d, cc_max:%d\n",
__func__, status, icn, ibat, icn - ibat, vbat,
pca9468->fv_uv, pca9468->cc_max);
return status;
}
/* hold mutex_lock(&pca9468->lock); */
static int pca9468_recover_ta(struct pca9468_charger *pca9468)
{
int ret;
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
pca9468->ta_vol = 0; /* set to a value to change rx vol */
ret = pca9468_send_rx_voltage(pca9468, MSG_REQUEST_FIXED_PDO);
} else {
/* TODO: recover TA to value before handoff, or use DT */
pca9468->ta_vol = 9000000;
pca9468->ta_cur = 2200000;
pca9468->ta_objpos = 1; /* PDO1 - fixed 5V */
ret = pca9468_send_pd_message(pca9468, MSG_REQUEST_FIXED_PDO);
}
/* will not be able to recover if TA is offline */
if (ret < 0)
pr_debug("%s: cannot recover TA (%d)\n", __func__, ret);
return 0;
}
/* Stop Charging */
static int pca9468_stop_charging(struct pca9468_charger *pca9468)
{
int ret = 0;
/* mark the end with \n in logbuffer */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: pca9468->charging_state=%d ret=%d\n",
__func__, pca9468->charging_state, ret);
mutex_lock(&pca9468->lock);
/* Check the current state */
if (pca9468->charging_state == DC_STATE_NO_CHARGING)
goto done;
/* Stop Direct charging */
cancel_delayed_work(&pca9468->timer_work);
cancel_delayed_work(&pca9468->pps_work);
pca9468->timer_id = TIMER_ID_NONE;
pca9468->timer_period = 0;
/* 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->chg_mode = CHG_NO_DC_MODE;
/* restore to config */
pca9468->pdata->iin_cfg = pca9468->pdata->iin_cfg_max;
pca9468->pdata->v_float = pca9468->pdata->v_float_dt;
/*
* Clear charging configuration
* TODO: use defaults when these are negative or zero at startup
* NOTE: cc_max is twice of IIN + headroom
*/
pca9468->cc_max = -1;
pca9468->fv_uv = -1;
/* Clear requests for new Vfloat and new IIN */
pca9468->new_vfloat = 0;
pca9468->new_iin = 0;
/* used to start DC and during errors */
pca9468->retry_cnt = 0;
/* close stats */
p9468_chg_stats_done(&pca9468->chg_data, pca9468);
p9468_chg_stats_dump(pca9468);
/* TODO: something here to prep TA for the switch */
ret = pca9468_set_charging(pca9468, false);
if (ret < 0) {
pr_err("%s: Error-set_charging(main)\n", __func__);
goto error;
}
/* stop charging and recover TA voltage */
if (pca9468->mains_online == true)
pca9468_recover_ta(pca9468);
power_supply_changed(pca9468->mains);
done:
error:
mutex_unlock(&pca9468->lock);
__pm_relax(pca9468->monitor_wake_lock);
pr_debug("%s: END, ret=%d\n", __func__, ret);
return ret;
}
#define FCC_TOLERANCE_RATIO 99
#define FCC_POWER_INCREASE_THRESHOLD 99
/*
* Compensate TA current for the target input current called from
* pca9468_charge_ccmode() when loop becomes not active.
*
* pca9468_charge_ccmode() ->
* -> pca9468_set_rx_voltage_comp()
* -> pca9468_set_ta_voltage_comp()
* -> pca9468_set_ta_current_comp2()
*
* NOTE: call holding mutex_lock(&pca9468->lock);
*/
static int pca9468_set_ta_current_comp(struct pca9468_charger *pca9468)
{
const int iin_high = pca9468->iin_cc + pca9468->pdata->iin_cc_comp_offset;
const int iin_low = pca9468->iin_cc - pca9468->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d prev_iin=%d",
__func__, iin, iin_low, pca9468->iin_cc, iin_high,
icn, ibat, pca9468->cc_max, rc,
pca9468->prev_iin);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > iin_high) {
/* TA current is higher than the target input current */
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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont1: ta_cur=%u",
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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2-1: ta_vol=%u",
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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2-2: ta_cur=%u",
pca9468->ta_cur);
}
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else if (iin < iin_low) {
/* 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 */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1: ta_vol=%u, ta_cur=%u",
pca9468->ta_vol, pca9468->ta_cur);
/* Set timer */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Cont3: ta_cur=%u",
pca9468->ta_cur);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Cont4: ta_vol=%u", pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* 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
*/
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End2: ta_vol=%u, ta_cur=%u",
pca9468->ta_vol, pca9468->ta_cur);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Cont5: ta_vol=%u",
pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
}
} else {
const unsigned int ta_cur = pca9468->ta_cur +
PD_MSG_TA_CUR_STEP;
/* Increase TA current (50mA) */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Cont6: ta_cur=%u->%u",
pca9468->ta_cur, ta_cur);
pca9468->ta_cur = pca9468->ta_cur + PD_MSG_TA_CUR_STEP;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
pca9468->prev_inc = INC_TA_CUR;
}
/*
* The previous increment was TA current, but input current
* did not increase. Try to increase TA voltage.
*/
} else 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 at the
* maximum values
*/
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End3: ta_vol=%u, ta_cur=%u",
pca9468->ta_vol, pca9468->ta_cur);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Cont7: ta_cur=%u", pca9468->ta_cur);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Comp. Cont8: ta_vol=%u->%u",
pca9468->ta_vol, pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* 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 */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Comp. End4(valid): ta_vol=%u, ta_cur=%u",
pca9468->ta_vol, pca9468->ta_cur);
/* Set timer */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
/* b/186969924: reset increment state on valid */
pca9468->prev_inc = INC_NONE;
}
/* Save previous iin adc */
pca9468->prev_iin = iin;
return 0;
}
/*
* max iin for 2:1 mode given cc_max and iin_cfg.
* TODO: maybe use pdata->iin_cfg if cc_max is zero or negative.
*/
static int pca9468_get_iin_max(const struct pca9468_charger *pca9468, int cc_max)
{
const int cc_limit = pca9468->pdata->iin_max_offset + cc_max / 2;
int iin_max;
iin_max = min(pca9468->pdata->iin_cfg_max, (unsigned int)cc_limit);
pr_debug("%s: iin_max=%d iin_cfg=%u iin_cfg_max=%d cc_max=%d cc_limit=%d\n",
__func__, iin_max, pca9468->pdata->iin_cfg,
pca9468->pdata->iin_cfg_max, cc_max, cc_limit);
return iin_max;
}
/* Compensate TA current for constant power mode */
/* hold mutex_lock(&pca9468->lock), schedule on return 0 */
static int pca9468_set_ta_current_comp2(struct pca9468_charger *pca9468)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], iin_cfg=%d icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin,
pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET_CP,
pca9468->iin_cc,
pca9468->iin_cc + PCA9468_IIN_CC_COMP_OFFSET_CP,
pca9468->pdata->iin_cfg,
icn, ibat, pca9468->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (pca9468->pdata->iin_cfg + pca9468->pdata->iin_cc_comp_offset)) {
/* TA current is higher than the target input current limit */
pca9468->ta_cur = pca9468->ta_cur - PD_MSG_TA_CUR_STEP;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else if (iin < (pca9468->iin_cc - PCA9468_IIN_CC_COMP_OFFSET_CP)) {
/* 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->pdata->iin_cc_comp_offset;
/* Check IIN_ADC < IIN_CC - 50mA */
if (iin < iin_cc_lb) {
unsigned int iin_apdo;
unsigned int val;
/* Set new IIN_CC to IIN_CC - 50mA */
pca9468->iin_cc = pca9468->iin_cc -
pca9468->pdata->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, (unsigned)PCA9468_TA_MAX_VOL *
pca9468->chg_mode);
/* Increase TA voltage(40mV) */
pca9468->ta_vol = pca9468->ta_vol + PD_MSG_TA_VOL_STEP * 2;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Cont1: ta_vol=%u",
pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else {
/* Wait for next current step compensation */
/* IIN_CC - 50mA < IIN ADC < IIN_CC - 20mA */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Comp.(wait): ta_vol=%u",
pca9468->ta_vol);
/* Set timer */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK2_T;
}
} 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CFG + 50mA */
pr_debug("End(valid): ta_vol=%u\n", pca9468->ta_vol);
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK2_T;
/* b/186969924: reset increment state on valid */
pca9468->prev_inc = INC_NONE;
}
/* Save previous iin adc */
pca9468->prev_iin = iin;
return 0;
}
/* Compensate TA voltage for the target input current */
/* hold mutex_lock(&pca9468->lock), schedule on return 0 */
static int pca9468_set_ta_voltage_comp(struct pca9468_charger *pca9468)
{
const int iin_high = pca9468->iin_cc + pca9468->pdata->iin_cc_comp_offset;
const int iin_low = pca9468->iin_cc - pca9468->pdata->iin_cc_comp_offset;
const ibat_limit = (pca9468->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
/* IIN = IBAT+SYSLOAD */
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin, iin_low, pca9468->iin_cc, iin_high,
icn, ibat, pca9468->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > iin_high) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else if (iin < pca9468->iin_cc - pca9468->pdata->iin_cc_comp_offset) {
/* 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 */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,"End1(max TA vol): ta_vol=%u",
pca9468->ta_vol);
/* Set timer */
/* Check the current charging state */
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;
}
} else {
const unsigned ta_vol = pca9468->ta_vol;
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2: ta_vol:%u->%u",
ta_vol, pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End(valid): ta_vol=%u low_ibat=%d\n",
pca9468->ta_vol, ibat < ibat_limit);
/* Check the current charging state */
if (pca9468->charging_state == DC_STATE_CC_MODE) {
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
} else {
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
}
}
return 0;
}
/* hold mutex_lock(&pca9468->lock), schedule on return 0 */
static int pca9468_set_rx_voltage_comp(struct pca9468_charger *pca9468)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
pr_debug("%s: ======START=======\n", __func__);
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin,
pca9468->iin_cc - pca9468->pdata->iin_cc_comp_offset,
pca9468->iin_cc,
pca9468->iin_cc + pca9468->pdata->iin_cc_comp_offset,
icn, ibat, pca9468->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (pca9468->iin_cc + pca9468->pdata->iin_cc_comp_offset)) {
/* RX current is higher than the target input current */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont1: rx_vol=%u",
pca9468->ta_vol);
/* Set RX Voltage */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else if (iin < (pca9468->iin_cc - pca9468->pdata->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) {
/* TA current is already the maximum voltage */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1(max RX vol): rx_vol=%u",
pca9468->ta_vol);
/* Check the current charging state */
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;
}
} else {
/* Increase RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol + WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2: rx_vol=%u",
pca9468->ta_vol);
/* Set RX Voltage */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "End(valid): rx_vol=%u",
pca9468->ta_vol);
if (pca9468->charging_state == DC_STATE_CC_MODE) {
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = PCA9468_CCMODE_CHECK1_T;
} else {
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
}
}
return 0;
}
/*
* iin limit for 2:1 for the adapter and chg_mode
* Minimum between the confguration, cc_max (scaled with offset) and the
* adapter capabilities.
*/
static int pca9468_get_iin_limit(const struct pca9468_charger *pca9468)
{
int iin_cc;
iin_cc = pca9468_get_iin_max(pca9468, pca9468->cc_max);
if (pca9468->ta_max_cur * pca9468->chg_mode < iin_cc)
iin_cc = pca9468->ta_max_cur * pca9468->chg_mode;
pr_debug("%s: iin_cc=%d ta_max_cur=%u, chg_mode=%d\n", __func__,
iin_cc, pca9468->ta_max_cur, pca9468->chg_mode);
return iin_cc;
}
/* recalculate ->ta_vol looking at demand (cc_max) */
static int pca9468_set_wireless_dc(struct pca9468_charger *pca9468, int vbat)
{
unsigned long val;
pca9468->iin_cc = pca9468_get_iin_limit(pca9468);
/* RX_vol = MAX[(2*VBAT_ADC*CHG_mode + 500mV), 8.0V*CHG_mode] */
pca9468->ta_vol = max(PCA9468_TA_MIN_VOL_PRESET * pca9468->chg_mode,
(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;
/* Set RX voltage to MIN[RX voltage, RX_MAX_VOL*chg_mode] */
pca9468->ta_vol = min(pca9468->ta_vol, pca9468->ta_max_vol);
/* ta_cur is ignored */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_max_vol=%d", __func__,
pca9468->iin_cc, pca9468->ta_vol, pca9468->ta_max_vol);
return 0;
}
/* recalculate ->ta_vol and ->ta_cur looking at demand (cc_max) */
static int pca9468_set_wired_dc(struct pca9468_charger *pca9468, int vbat)
{
unsigned long val;
int iin_cc;
pca9468->iin_cc = pca9468_get_iin_limit(pca9468);
/* Calculate new TA max voltage, current */
val = pca9468->iin_cc / PD_MSG_TA_CUR_STEP;
iin_cc = val * PD_MSG_TA_CUR_STEP;
val = pca9468->ta_max_pwr / (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, (unsigned long)PCA9468_TA_MAX_VOL *
pca9468->chg_mode);
/* MAX[8000mV * chg_mode, 2 * VBAT_ADC * chg_mode + 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;
pca9468->ta_vol = min(pca9468->ta_vol, pca9468->ta_max_vol);
/* Set TA current to IIN_CC */
pca9468->ta_cur = iin_cc / pca9468->chg_mode;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_cur=%d ta_max_vol=%d",
__func__, pca9468->iin_cc, pca9468->ta_vol, pca9468->ta_cur,
pca9468->ta_max_vol);
return 0;
}
/*
* like pca9468_preset_dcmode() but will not query the TA.
* Called from timer:
* [pca9468_charge_ccmode | pca9468_charge_cvmode] ->
* pca9468_apply_new_iin() ->
* pca9468_adjust_ta_current() ->
* pca9468_reset_dcmode()
* pca9468_apply_new_vfloat() ->
* pca9468_reset_dcmode()
*
* NOTE: caller holds mutex_lock(&pca9468->lock);
*/
static int pca9468_reset_dcmode(struct pca9468_charger *pca9468)
{
int ret = -EINVAL, vbat;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
if (pca9468->cc_max < 0) {
pr_err("%s: invalid cc_max=%d\n", __func__, pca9468->cc_max);
goto error;
}
/*
* VBAT is over threshold but it might be "bouncy" due to transitory
* used to determine ta_vout.
*/
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbat < 0)
return vbat;
/* Check the TA type and set the charging mode */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
ret = pca9468_set_wireless_dc(pca9468, vbat);
} else {
ret = pca9468_set_wired_dc(pca9468, vbat);
}
/* Clear previous IIN ADC, TA increment flag */
pca9468->prev_inc = INC_NONE;
pca9468->prev_iin = 0;
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* The caller was triggered from pca9468_apply_new_iin(), return to the
* calling CC or CV loop.
* call holding mutex_unlock(&pca9468->lock);
*/
static void pca9468_return_to_loop(struct pca9468_charger *pca9468)
{
switch (pca9468->ret_state) {
case DC_STATE_CC_MODE:
pca9468->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_CV_MODE:
pca9468->timer_id = TIMER_CHECK_CVMODE;
break;
default:
dev_err(pca9468->dev, "%s: invalid ret_state=%u\n",
__func__, pca9468->ret_state);
return;
}
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, pca9468->ret_state);
pca9468->charging_state = pca9468->ret_state;
pca9468->timer_period = 1000;
pca9468->ret_state = 0;
pca9468->new_iin = 0;
}
/*
* Kicked from pca9468_apply_new_iin() when pca9468->new_iin!=0 and completed
* off the timer. Never called on WLC_DC.
* NOTE: Will return to the calling loop in ->ret_state
*/
static int pca9468_adjust_ta_current(struct pca9468_charger *pca9468)
{
const int ta_limit = pca9468->iin_cc / pca9468->chg_mode;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
int ret = 0;
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=%d ta_limit=%d, iin_cfg=%d icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin, pca9468->iin_cc, ta_limit, pca9468->pdata->iin_cfg,
icn, ibat, pca9468->cc_max, rc);
if (pca9468->charging_state != DC_STATE_ADJUST_TACUR)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_ADJUST_TACUR);
pca9468->charging_state = DC_STATE_ADJUST_TACUR;
if (pca9468->ta_cur == ta_limit) {
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"adj. End, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
/* "Recover" IIN_CC to the original value (new_iin) */
pca9468->iin_cc = pca9468->new_iin;
pca9468_return_to_loop(pca9468);
} else if (pca9468->iin_cc > pca9468->pdata->iin_cfg) {
const int old_iin_cfg = pca9468->pdata->iin_cfg;
/* Raise iin_cfg to the new iin_cc value (why??!?!?) */
pca9468->pdata->iin_cfg = pca9468->iin_cc;
ret = pca9468_set_input_current(pca9468, pca9468->iin_cc);
if (ret == 0)
ret = pca9468_reset_dcmode(pca9468);
if (ret < 0)
goto error;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"New IIN, ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, iin_cfg=%d->%d chg_mode=%u",
pca9468->ta_max_vol, pca9468->ta_max_cur,
pca9468->ta_max_pwr, pca9468->iin_cc,
old_iin_cfg, pca9468->iin_cc,
pca9468->chg_mode);
pca9468->new_iin = 0;
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_ADJUST_CC);
/* Send PD Message and go to Adjust CC mode */
pca9468->charging_state = DC_STATE_ADJUST_CC;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else {
unsigned int val;
/*
* Adjust IIN_CC with APDO resolution(50mA)
* pca9468->iin_cc will be reset to pca9468->new_iin when
* ->ta_cur reaches the ta_limit at the beginning of the
* function
*/
val = pca9468->iin_cc / PD_MSG_TA_CUR_STEP;
pca9468->iin_cc = val * PD_MSG_TA_CUR_STEP;
pca9468->ta_cur = pca9468->iin_cc / pca9468->chg_mode;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "adjust iin=%u ta_cur=%d chg_mode=%d",
pca9468->iin_cc, pca9468->ta_cur, pca9468->chg_mode);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
/* reschedule on ret == 0 */
error:
return ret;
}
/* Kicked from apply_new_iin() then run off the timer
* call holding mutex_lock(&pca9468->lock);
*/
static int pca9468_adjust_ta_voltage(struct pca9468_charger *pca9468)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (pca9468->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_ADJUST_TAVOL);
pca9468->charging_state = DC_STATE_ADJUST_TAVOL;
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin, pca9468->iin_cc - PD_MSG_TA_CUR_STEP,
pca9468->iin_cc, pca9468->iin_cc + PD_MSG_TA_CUR_STEP,
icn, ibat, pca9468->cc_max, rc);
if (iin < 0)
return 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont1, ta_vol=%u",
pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else if (iin < (pca9468->iin_cc - PD_MSG_TA_CUR_STEP)) {
/* TA current is lower than the target input current */
if (pca9468_check_status(pca9468) == STS_MODE_VFLT_LOOP) {
/* IIN current may not able to increase in CV */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
pca9468_return_to_loop(pca9468);
} else if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA TA voltage is already at the maximum voltage */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
pca9468_return_to_loop(pca9468);
} else {
/* Increase TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2, ta_vol=%u",
pca9468->ta_vol);
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End2, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
pca9468->ta_cur, pca9468->ta_vol,
pca9468->iin_cc, pca9468->chg_mode);
pca9468_return_to_loop(pca9468);
}
return 0;
}
/*
* Kicked from apply_new_iin() then run off the timer
* * NOTE: caller must hold mutex_lock(&pca9468->lock)
*/
static int pca9468_adjust_rx_voltage(struct pca9468_charger *pca9468)
{
const int iin_high = pca9468->iin_cc + pca9468->pdata->iin_cc_comp_offset;
const int iin_low = pca9468->iin_cc - pca9468->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (pca9468->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_ADJUST_TAVOL);
pca9468->charging_state = DC_STATE_ADJUST_TAVOL;
rc = pca9468_get_ibatt(pca9468, &ibat);
if (rc == 0)
rc = pca9468_get_iin(pca9468, &icn);
if (rc == 0)
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
ovc_flag = ibat > pca9468->cc_max;
if (ovc_flag)
p9468_chg_stats_inc_ovcf(&pca9468->chg_data, ibat, pca9468->cc_max);;
logbuffer_prlog(pca9468, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin, iin_low, pca9468->iin_cc, iin_high,
icn, ibat, pca9468->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with targer input current */
if (iin > iin_high) {
/* RX current is higher than the target input current */
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont1, rx_vol=%u",
pca9468->ta_vol);
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
} else if (iin < iin_low) {
/* RX current is lower than the target input current */
if (pca9468_check_status(pca9468) == STS_MODE_VFLT_LOOP) {
/* RX current may not able to increase in CV */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, rx_vol=%u, iin_cc=%u",
pca9468->ta_vol, pca9468->iin_cc);
pca9468_return_to_loop(pca9468);
} else if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* RX current is already the maximum voltage */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1, rx_vol=%u, iin_cc=%u, chg_mode=%u",
pca9468->ta_vol, pca9468->iin_cc,
pca9468->chg_mode);
/* Return charging state to the previous state */
pca9468_return_to_loop(pca9468);
} else {
/* Increase RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol + WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2, rx_vol=%u",
pca9468->ta_vol);
/* Set RX voltage */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End2, rx_vol=%u, iin_cc=%u, chg_mode=%u",
pca9468->ta_vol, pca9468->iin_cc,
pca9468->chg_mode);
/* Return charging state to the previous state */
pca9468_return_to_loop(pca9468);
}
return 0;
}
/*
* Called from CC and CV loops to set a new IIN (i.e. a new cc_max charging
* current). Should also change the iin_cfg to avoid overcurrents.
* NOTE: caller must hold mutex_lock(&pca9468->lock)
*/
static int pca9468_apply_new_iin(struct pca9468_charger *pca9468)
{
int ret;
logbuffer_prlog(pca9468, LOGLEVEL_INFO,
"new_iin=%d (cc_max=%d), ta_type=%d charging_state=%d",
pca9468->new_iin, pca9468->cc_max,
pca9468->ta_type, pca9468->charging_state);
/* iin_cfg is adjusted UP in pca9468_set_input_current() */
ret = pca9468_set_input_current(pca9468, pca9468->new_iin);
if (ret < 0)
return ret;
pca9468->pdata->iin_cfg = pca9468->new_iin;
/*
* ->ret_state is used to go back to the loop (CC or CV) that called
* this function.
*/
pca9468->ret_state = pca9468->charging_state;
/*
* new_iin is used to trigger the process which might span one or more
* timer ticks the new_iin . The flag will be cleared once the target
* is reached.
*/
pca9468->iin_cc = pca9468->new_iin;
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
ret = pca9468_adjust_rx_voltage(pca9468);
} else 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;
ret = pca9468_adjust_ta_voltage(pca9468);
} else {
ret = pca9468_adjust_ta_current(pca9468);
}
/* need reschedule on ret != 0 */
pr_debug("%s: ret=%d\n", __func__, ret);
return ret;
}
/*
* also called from pca9468_set_new_cc_max()
* call holding mutex_unlock(&pca9468->lock);
*/
static int pca9468_set_new_iin(struct pca9468_charger *pca9468, int iin)
{
int ret = 0;
if (iin < 0) {
pr_debug("%s: ignore negative iin=%d\n", __func__, iin);
return 0;
}
/* same as previous request nevermind */
if (iin == pca9468->new_iin)
return 0;
pr_debug("%s: new_iin=%d->%d state=%d\n", __func__,
pca9468->new_iin, iin, pca9468->charging_state);
/* apply iin_cc in pca9468_preset_config() at start */
if (pca9468->charging_state == DC_STATE_NO_CHARGING ||
pca9468->charging_state == DC_STATE_CHECK_VBAT) {
/* used on start vs the ->iin_cfg one */
pca9468->pdata->iin_cfg = iin;
pca9468->iin_cc = iin;
} else if (pca9468->ret_state == 0) {
/*
* pca9468_apply_new_iin() has not picked out the value yet
* and the value can be changed safely.
*/
pca9468->new_iin = iin;
/* might want to tickle the loop now */
} else {
/* the caller must retry */
ret = -EAGAIN;
}
pr_debug("%s: ret=%d\n", __func__, ret);
return ret;
}
/*
* The is no CC loop in this part: current must be controlled on TA side
* adjusting output power. cc_max (the charging current) is scaled to iin
*
*/
static int pca9468_set_new_cc_max(struct pca9468_charger *pca9468, int cc_max)
{
const int prev_cc_max = pca9468->cc_max;
int iin_max, ret = 0;
if (cc_max < 0) {
pr_debug("%s: ignore negative cc_max=%d\n", __func__, cc_max);
return 0;
}
mutex_lock(&pca9468->lock);
/* same as previous request nevermind */
if (cc_max == pca9468->cc_max)
goto done;
/* iin will be capped by the adapter capabilities in reset_dcmode() */
iin_max = pca9468_get_iin_max(pca9468, cc_max);
if (iin_max <= 0) {
pr_debug("%s: ignore negative iin_max=%d\n", __func__, iin_max);
goto done;
}
ret = pca9468_set_new_iin(pca9468, iin_max);
if (ret == 0)
pca9468->cc_max = cc_max;
logbuffer_prlog(pca9468, LOGLEVEL_INFO,
"%s: charging_state=%d cc_max=%d->%d iin_max=%d, ret=%d",
__func__, pca9468->charging_state, prev_cc_max,
cc_max, iin_max, ret);
done:
pr_debug("%s: ret=%d\n", __func__, ret);
mutex_unlock(&pca9468->lock);
return ret;
}
/*
* Apply pca9468->new_vfloat to the charging voltage.
* Called from CC and CV loops, needs mutex_lock(&pca9468->lock)
*/
static int pca9468_apply_new_vfloat(struct pca9468_charger *pca9468)
{
int fv_uv, ret = 0;
/* compensated float voltage, -EINVAL if under pca_vbat */
fv_uv = pca9468_apply_irdrop(pca9468, pca9468->new_vfloat);
if (fv_uv < 0)
return fv_uv;
/* actually change the hardware */
ret = pca9468_set_vfloat(pca9468, fv_uv);
if (ret < 0)
goto error_done;
/* Restart the process (TODO: optimize this) */
ret = pca9468_reset_dcmode(pca9468);
if (ret < 0) {
pr_err("%s: cannot reset dcmode (%d)\n", __func__, ret);
} else {
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_ADJUST_CC);
pca9468->charging_state = DC_STATE_ADJUST_CC;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
error_done:
logbuffer_prlog(pca9468, LOGLEVEL_INFO,
"%s: new_vfloat=%d, fv_uv=%d ret=%d", __func__,
pca9468->new_vfloat, fv_uv, ret);
if (ret == 0)
pca9468->new_vfloat = 0;
return ret;
}
static int pca9468_set_new_vfloat(struct pca9468_charger *pca9468, int vfloat)
{
int ret = 0;
if (vfloat < 0) {
pr_debug("%s: ignore negative vfloat %d\n", __func__, vfloat);
return 0;
}
mutex_lock(&pca9468->lock);
if (pca9468->fv_uv == vfloat)
goto done;
/* this is what is requested */
pca9468->fv_uv = vfloat;
/* use fv_uv at start in pca9468_preset_config() */
if (pca9468->charging_state == DC_STATE_NO_CHARGING ||
pca9468->charging_state == DC_STATE_CHECK_VBAT) {
// pca9468->pdata->v_float = vfloat;
} else {
/* applied in pca9468_apply_new_vfloat() from CC or in CV loop */
pca9468->new_vfloat = vfloat;
/* might want to tickle the cycle */
}
done:
mutex_unlock(&pca9468->lock);
return ret;
}
/* called on loop inactive */
static int pca9468_ajdust_ccmode_wireless(struct pca9468_charger *pca9468, int iin)
{
/* 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 */
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
pca9468->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "End1: IIN_ADC=%d, rx_vol=%u",
iin, pca9468->ta_vol);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
/* Check RX voltage */
} else if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* RX voltage is already max value */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,"End2: MAX value, rx_vol=%u max=%d",
pca9468->ta_vol, pca9468->ta_max_vol);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
} 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont: rx_vol=%u",
pca9468->ta_vol);
/* Set RX voltage */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
return 0;
}
/* called on loop inactive */
static int pca9468_ajdust_ccmode_wired(struct pca9468_charger *pca9468, int iin)
{
/* USBPD TA is connected */
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 */
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
pca9468->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End1: IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, pca9468->ta_vol, pca9468->ta_cur);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
/* Check TA voltage */
} else if (pca9468->ta_vol == pca9468->ta_max_vol) {
/* TA voltage is already max value */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End2: MAX value, ta_vol=%u, ta_cur=%u",
pca9468->ta_vol, pca9468->ta_cur);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
/* 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
pca9468->ta_vol);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
pca9468->ta_vol);
/* Set TA increment flag */
pca9468->prev_inc = INC_TA_VOL;
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/* 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 with 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont3: ta_vol=%u",
pca9468->ta_vol);
pca9468->prev_inc = INC_TA_VOL;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
/*
* 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 */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"End(MAX_CUR): IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, pca9468->ta_vol, pca9468->ta_cur);
pca9468->prev_inc = INC_NONE;
/* Go to CC mode */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 0;
} 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "Cont4: ta_cur=%u",
pca9468->ta_cur);
pca9468->prev_inc = INC_TA_CUR;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
}
return 0;
}
/* 2:1 Direct Charging Adjust CC MODE control
* called at the beginnig of CC mode charging. Will be followed by
* pca9468_charge_ccmode with wich share some of the adjustments.
*/
static int pca9468_charge_adjust_ccmode(struct pca9468_charger *pca9468)
{
int iin, ccmode, vbatt, vin_vol;
bool apply_ircomp = false;
int ret = 0;
mutex_lock(&pca9468->lock);
pr_debug("%s: ======START=======\n", __func__);
pca9468_prlog_state(pca9468, __func__);
if (pca9468->charging_state != DC_STATE_ADJUST_CC)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_ADJUST_CC);
pca9468->charging_state = DC_STATE_ADJUST_CC;
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error; // This is not active mode.
ccmode = pca9468_check_status(pca9468);
if (ccmode < 0) {
ret = ccmode;
goto error;
}
switch(ccmode) {
case STS_MODE_IIN_LOOP:
case STS_MODE_CHG_LOOP: /* CHG_LOOP does't exist */
apply_ircomp = true;
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "End1: rx_vol=%u",
pca9468->ta_vol);
} else 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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "End2: ta_cur=%u, ta_vol=%u",
pca9468->ta_cur, pca9468->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "End3: ta_cur=%u, ta_vol=%u",
pca9468->ta_cur, pca9468->ta_vol);
}
pca9468->prev_inc = INC_NONE;
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CC_MODE);
/* Send PD Message and then go to CC mode */
pca9468->charging_state = DC_STATE_CC_MODE;
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
vbatt = pca9468_read_adc(pca9468, ADCCH_VBAT);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "End4: vbatt=%d, ta_vol=%u",
vbatt, pca9468->ta_vol);
/* Clear TA increment flag */
pca9468->prev_inc = INC_NONE;
/* Go to Pre-CV mode */
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"Inactive: iin=%d, iin_cc=%d, cc_max=%d",
iin, pca9468->iin_cc, pca9468->cc_max);
if (iin < 0)
break;
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
ret = pca9468_ajdust_ccmode_wireless(pca9468, iin);
} else {
ret = pca9468_ajdust_ccmode_wired(pca9468, iin);
}
if (ret < 0) {
pr_err("%s: %d", __func__, ret);
} else {
pca9468->prev_iin = iin;
apply_ircomp = true;
}
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "VIN_UVLO: ta_vol=%u, vin_vol=%d",
pca9468->ta_cur, vin_vol);
/* Check VIN after 1sec */
pca9468->timer_id = TIMER_ADJUST_CCMODE;
pca9468->timer_period = 1000;
break;
default:
goto error;
}
if (!pca9468->irdrop_comp_ok && apply_ircomp) {
int rc;
rc = pca9468_comp_irdrop(pca9468);
if (rc < 0)
pr_err("%s: cannot apply ircomp (%d)\n",
__func__, rc);
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error:
mutex_unlock(&pca9468->lock);
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* <0 error, 0 no new limits, >0 new limits */
static int pca9468_apply_new_limits(struct pca9468_charger *pca9468)
{
int ret = 0;
if (pca9468->new_iin && pca9468->new_iin < pca9468->iin_cc) {
ret = pca9468_apply_new_iin(pca9468);
if (ret == 0)
ret = 1;
} else if (pca9468->new_vfloat) {
ret = pca9468_apply_new_vfloat(pca9468);
if (ret == 0)
ret = 1;
} else if (pca9468->new_iin) {
ret = pca9468_apply_new_iin(pca9468);
if (ret == 0)
ret = 1;
} else {
return 0;
}
return ret;
}
/* 2:1 Direct Charging CC MODE control */
static int pca9468_charge_ccmode(struct pca9468_charger *pca9468)
{
int ccmode, vin_vol, iin, ret = 0;
bool apply_ircomp = false;
pr_debug("%s: ======START======= \n", __func__);
mutex_lock(&pca9468->lock);
if (pca9468->charging_state != DC_STATE_CC_MODE)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CC_MODE);
pca9468->charging_state = DC_STATE_CC_MODE;
pca9468_prlog_state(pca9468, __func__);
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error_exit;
/*
* A change in VFLOAT here means that we have busted the tier, a
* change in iin means that the thermal engine had changed cc_max.
* pca9468_apply_new_limits() changes pca9468->charging_state to
* DC_STATE_ADJUST_TAVOL or DC_STATE_ADJUST_TACUR when new limits
* need to be applied.
*/
ret = pca9468_apply_new_limits(pca9468);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
ccmode = pca9468_check_status(pca9468);
if (ccmode < 0) {
ret = ccmode;
goto error_exit;
}
switch(ccmode) {
case STS_MODE_LOOP_INACTIVE:
/* Set input current compensation */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Need RX voltage compensation */
ret = pca9468_set_rx_voltage_comp(pca9468);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "INACTIVE1: rx_vol=%u",
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) {
pca9468->ta_cur = PCA9468_TA_MIN_CUR;
ret = pca9468_set_ta_voltage_comp(pca9468);
} else if (ta_max_vol >= PCA9468_TA_MAX_VOL_CP) {
ret = pca9468_set_ta_current_comp(pca9468);
} else {
/* constant power mode */
ret = pca9468_set_ta_current_comp2(pca9468);
}
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"INACTIVE2: ta_cur=%u, ta_vol=%u",
pca9468->ta_cur,
pca9468->ta_vol);
}
if (ret == 0)
apply_ircomp = true;
break;
case STS_MODE_VFLT_LOOP:
/* TODO: adjust fv_uv here based on real vbatt */
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG, "CC VFLOAT: iin=%d", iin);
/* go to Pre-CV mode */
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 0;
break;
case STS_MODE_IIN_LOOP:
case STS_MODE_CHG_LOOP:
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (iin < 0)
break;
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"IIN_LOOP1: iin=%d, next_rx_vol=%u",
iin, pca9468->ta_vol);
} else if (pca9468->ta_cur <= PCA9468_TA_MIN_CUR) {
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"IIN_LOOP2: iin=%d, next_ta_vol=%u",
iin, pca9468->ta_vol);
} else {
/* Decrease TA current (50mA) */
pca9468->ta_cur = pca9468->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"IIN_LOOP3: iin=%d, next_ta_cur=%u",
iin, pca9468->ta_cur);
}
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
pca9468->ta_cur, pca9468->ta_vol, vin_vol);
/* Check VIN after 1sec */
pca9468->timer_id = TIMER_CHECK_CCMODE;
pca9468->timer_period = 1000;
break;
default:
break;
}
if (!pca9468->irdrop_comp_ok && apply_ircomp) {
int rc;
rc = pca9468_comp_irdrop(pca9468);
if (rc < 0)
pr_err("%s: cannot apply ircomp (%d)\n",
__func__, rc);
}
done:
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error_exit:
mutex_unlock(&pca9468->lock);
pr_debug("%s: End, ccmode=%d timer_id=%d, timer_period=%lu ret=%d\n",
__func__, ccmode, pca9468->timer_id, pca9468->timer_period,
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__);
mutex_lock(&pca9468->lock);
if (pca9468->charging_state != DC_STATE_START_CV)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_START_CV);
pca9468->charging_state = DC_STATE_START_CV;
/* Check the charging type */
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error_exit;
/* Check the status */
cvmode = pca9468_check_status(pca9468);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
switch(cvmode) {
case STS_MODE_CHG_LOOP:
case STS_MODE_IIN_LOOP:
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
pca9468->ta_vol = pca9468->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: rx_vol=%u",
__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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_cur=%u",
__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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_vol=%u",
__func__, pca9468->ta_vol);
}
}
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
break;
case STS_MODE_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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: rx_vol=%u",
__func__, pca9468->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
pca9468->ta_vol = pca9468->ta_vol -
PCA9468_TA_VOL_STEP_PRE_CV *
pca9468->chg_mode;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: ta_vol=%u",
__func__, pca9468->ta_vol);
}
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
/* Exit Pre CV mode */
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV End: ta_vol=%u, ta_cur=%u",
__func__, pca9468->ta_vol, pca9468->ta_cur);
/* Need to implement notification to other driver */
/* To do here */
/* Go to CV mode */
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: PreCV VIN_UVLO: ta_vol=%u, vin_vol=%u",
__func__, pca9468->ta_cur, vin_vol);
/* Check VIN after 1sec */
pca9468->timer_id = TIMER_ENTER_CVMODE;
pca9468->timer_period = 1000;
break;
default:
break;
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error_exit:
mutex_unlock(&pca9468->lock);
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int pca9468_check_eoc(struct pca9468_charger *pca9468)
{
const int eoc_tolerance = 25000; /* 25mV under max float voltage */
const int vlimit = PCA9468_COMP_VFLOAT_MAX - eoc_tolerance;
int iin, vbat;
iin = pca9468_read_adc(pca9468, ADCCH_IIN);
if (iin < 0) {
pr_err("%s: iin=%d\n", __func__, iin);
return iin;
}
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbat < 0) {
pr_err("%s: vbat=%d\n", __func__, vbat);
return vbat;
}
pr_debug("%s: iin=%d, topoff=%u, vbat=%d vlimit=%d\n", __func__,
iin, pca9468->pdata->iin_topoff,
vbat, vlimit);
return iin < pca9468->pdata->iin_topoff && vbat >= vlimit;
}
/* 2:1 Direct Charging CV MODE control */
static int pca9468_charge_cvmode(struct pca9468_charger *pca9468)
{
int ret = 0;
int cvmode;
int vin_vol;
pr_debug("%s: ======START=======\n", __func__);
mutex_lock(&pca9468->lock);
if (pca9468->charging_state != DC_STATE_CV_MODE)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CV_MODE);
pca9468->charging_state = DC_STATE_CV_MODE;
ret = pca9468_check_error(pca9468);
if (ret != 0)
goto error_exit;
/*
* A change in vfloat and cc_max here is a normal tier transition, a
* change in iin means that the thermal engine has changed cc_max.
*/
ret = pca9468_apply_new_limits(pca9468);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
cvmode = pca9468_check_status(pca9468);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
if (cvmode == STS_MODE_LOOP_INACTIVE) {
ret = pca9468_check_eoc(pca9468);
if (ret < 0)
goto error_exit;
if (ret)
cvmode = STS_MODE_CHG_DONE;
}
switch(cvmode) {
case STS_MODE_CHG_DONE: {
const bool done_already = pca9468->charging_state ==
DC_STATE_CHARGING_DONE;
if (!done_already)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n",
__func__, pca9468->charging_state,
DC_STATE_CHARGING_DONE);
/* Keep CV mode until driver send stop charging */
pca9468->charging_state = DC_STATE_CHARGING_DONE;
power_supply_changed(pca9468->mains);
/* _cpm already came in */
if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
pr_debug("%s: Already stop DC\n", __func__);
break;
}
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: done_already=%d charge Done\n", __func__,
done_already);
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
} break;
case STS_MODE_CHG_LOOP:
case STS_MODE_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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: rx_vol=%u",
__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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_cur=%u",
__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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_vol=%u",
__func__, pca9468->ta_vol);
}
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
break;
case STS_MODE_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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: rx_vol=%u",
__func__, pca9468->ta_vol);
} else {
/* Decrease TA voltage */
pca9468->ta_vol = pca9468->ta_vol -
PD_MSG_TA_VOL_STEP;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: ta_vol=%u",
__func__, pca9468->ta_vol);
}
/* Send PD Message */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = PCA9468_CVMODE_CHECK_T;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = pca9468_read_adc(pca9468, ADCCH_VIN);
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: CC VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
__func__, pca9468->ta_cur, pca9468->ta_vol,
vin_vol);
/* Check VIN after 1sec */
pca9468->timer_id = TIMER_CHECK_CVMODE;
pca9468->timer_period = 1000;
break;
default:
break;
}
done:
pr_debug("%s: reschedule next id=%d period=%ld chg_state=%d\n",
__func__, pca9468->timer_id, pca9468->timer_period,
pca9468->charging_state);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error_exit:
mutex_unlock(&pca9468->lock);
pr_debug("%s: End, ret=%d next\n", __func__, ret);
return ret;
}
/*
* Preset TA voltage and current for Direct Charging Mode using
* the configured cc_max and fv_uv limits. Used only on start
*/
static int pca9468_preset_dcmode(struct pca9468_charger *pca9468)
{
int vbat;
int ret = 0;
pr_debug("%s: ======START=======\n", __func__);
pr_debug("%s: = charging_state=%u == \n", __func__,
pca9468->charging_state);
/* gcpm set ->cc_max and ->fv_uv before starting */
if (pca9468->cc_max < 0 || pca9468->fv_uv < 0) {
pr_err("%s: cc_max=%d fv_uv=%d invalid\n", __func__,
pca9468->cc_max, pca9468->fv_uv);
return -EINVAL;
}
if (pca9468->charging_state != DC_STATE_PRESET_DC)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_PRESET_DC);
pca9468->charging_state = DC_STATE_PRESET_DC;
/* VBAT is over threshold but it might be "bouncy" due to transitory */
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* v_float is set on start from GCPM */
if (vbat > pca9468->fv_uv) {
pr_err("%s: vbat adc=%d is higher than VFLOAT=%d\n", __func__,
vbat, pca9468->fv_uv);
ret = -EINVAL;
goto error;
}
/* determined by ->cfg_iin and cc_max */
pca9468->ta_max_cur = pca9468_get_iin_max(pca9468, pca9468->cc_max);
pr_debug("%s: ta_max_cur=%u, iin_cfg=%u, pca9468->ta_type=%d\n",
__func__, pca9468->ta_max_cur, pca9468->pdata->iin_cfg,
pca9468->ta_type);
/* Check the TA type and set the charging mode */
if (pca9468->ta_type == TA_TYPE_WIRELESS) {
/*
* Set the RX max voltage to enough high value to find RX
* maximum voltage initially
*/
pca9468->ta_max_vol = PCA9468_WCRX_MAX_VOL * pca9468->chg_mode;
/* Get the RX max current/voltage(RX_MAX_CUR/VOL) */
ret = pca9468_get_rx_max_power(pca9468);
if (ret < 0) {
pr_err("%s: no RX voltage to support 4:1 (%d)\n", __func__, ret);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
}
ret = pca9468_set_wireless_dc(pca9468, vbat);
if (ret < 0) {
pr_err("%s: set wired failed (%d)\n", __func__, ret);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(pca9468, LOGLEVEL_INFO,
"Preset DC, rx_max_vol=%u, rx_max_cur=%u, rx_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
pca9468->ta_max_vol, pca9468->ta_max_cur, pca9468->ta_max_pwr,
pca9468->iin_cc, pca9468->chg_mode);
} else {
const unsigned int ta_max_vol = PCA9468_TA_MAX_VOL * pca9468->chg_mode;
/*
* Get the APDO max for 2:1 mode.
* Returns ->ta_max_vol, ->ta_max_cur, ->ta_max_pwr and
* ->ta_objpos for the given ta_max_vol and ta_max_cur.
*/
ret = pca9468_get_apdo_max_power(pca9468, ta_max_vol, PCA9468_TA_MAX_CUR);
if (ret < 0) {
pr_warn("%s: No APDO to support 2:1 for %d\n", __func__,
PCA9468_TA_MAX_CUR);
ret = pca9468_get_apdo_max_power(pca9468, ta_max_vol, 0);
}
if (ret < 0) {
pr_err("%s: No APDO to support 2:1\n", __func__);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
}
/*
* ->ta_max_cur is too high for startup, needs to target
* CC before hitting max current AND work to ta_max_cur
* from there.
*/
ret = pca9468_set_wired_dc(pca9468, vbat);
if (ret < 0) {
pr_err("%s: set wired failed (%d)\n", __func__, ret);
pca9468->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(pca9468, LOGLEVEL_INFO,
"Preset DC, objpos=%d ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
pca9468->ta_objpos, pca9468->ta_max_vol, pca9468->ta_max_cur,
pca9468->ta_max_pwr, pca9468->iin_cc, pca9468->chg_mode);
}
error:
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Preset direct charging configuration and start charging */
static int pca9468_preset_config(struct pca9468_charger *pca9468)
{
int ret = 0;
pr_debug("%s: ======START=======\n", __func__);
mutex_lock(&pca9468->lock);
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_PRESET_DC);
pca9468->charging_state = DC_STATE_PRESET_DC;
/* ->iin_cc and ->fv_uv are configured externally */
ret = pca9468_set_input_current(pca9468, pca9468->pdata->iin_cfg);
if (ret < 0)
goto error;
ret = pca9468_set_vfloat(pca9468, pca9468->fv_uv);
if (ret < 0)
goto error;
/* Enable PCA9468 unless aready enabled */
ret = pca9468_set_charging(pca9468, true);
if (ret < 0)
goto error;
/* Clear previous iin adc */
pca9468->prev_iin = 0;
pca9468->prev_inc = INC_NONE;
/* Go to CHECK_ACTIVE state after 150ms, 300ms for wireless */
pca9468->timer_id = TIMER_CHECK_ACTIVE;
if (pca9468->ta_type == TA_TYPE_WIRELESS)
pca9468->timer_period = PCA9468_ENABLE_WLC_DELAY_T;
else
pca9468->timer_period = PCA9468_ENABLE_DELAY_T;
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
error:
mutex_unlock(&pca9468->lock);
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* Check the charging status at start before entering the adjust cc mode or
* from pca9468_send_message() after a failure.
*/
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);
mutex_lock(&pca9468->lock);
if (pca9468->charging_state != DC_STATE_CHECK_ACTIVE)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CHECK_ACTIVE);
pca9468->charging_state = DC_STATE_CHECK_ACTIVE;
ret = pca9468_check_error(pca9468);
if (ret == 0) {
/* PCA9468 is active state */
pca9468->retry_cnt = 0;
pca9468->timer_id = TIMER_ADJUST_CCMODE;
pca9468->timer_period = 0;
} else if (ret == -EAGAIN) {
/* try restarting only */
if (pca9468->retry_cnt >= PCA9468_MAX_RETRY_CNT) {
pr_err("%s: retry failed\n", __func__);
ret = -EINVAL;
goto exit_done;
}
/*
* Disable charging to retry enabling it later, return 0 here
* and the timer loop will figure out that there is something
* wrong and will retry.
*/
ret = pca9468_set_charging(pca9468, false);
pr_err("%s: retry cnt=%d, (%d)\n", __func__,
pca9468->retry_cnt, ret);
if (ret == 0) {
pca9468->timer_id = TIMER_PRESET_DC;
pca9468->timer_period = 0;
pca9468->retry_cnt++;
}
}
exit_done:
/* Implement error handler function if it is needed */
if (ret < 0) {
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: charging_state=%d, not active or error (%d)",
__func__, pca9468->charging_state, ret);
pca9468->timer_id = TIMER_ID_NONE;
pca9468->timer_period = 0;
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
mutex_unlock(&pca9468->lock);
return ret;
}
/* Enter direct charging algorithm */
static int pca9468_start_direct_charging(struct pca9468_charger *pca9468)
{
struct p9468_chg_stats *chg_data = &pca9468->chg_data;
unsigned int val;
int ret;
pr_debug("%s: =========START=========\n", __func__);
mutex_lock(&pca9468->lock);
/* 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)
goto error_done;
/* 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)
goto error_done;
/* 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)
goto error_done;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_NTC_TH_2,
PCA9468_BIT_NTC_THRESHOLD9_8, (val >> 8));
if (ret < 0)
goto error_done;
/* configure DC charging type for the requested index */
ret = pca9468_set_ta_type(pca9468, pca9468->pps_index);
pr_info("%s: Current ta_type=%d, chg_mode=%d\n", __func__,
pca9468->ta_type, pca9468->chg_mode);
if (ret < 0)
goto error_done;
/* wake lock */
__pm_stay_awake(pca9468->monitor_wake_lock);
/* Preset charging configuration and TA condition */
ret = pca9468_preset_dcmode(pca9468);
if (ret == 0) {
/* Configure the TA and start charging */
pca9468->timer_id = TIMER_PDMSG_SEND;
pca9468->timer_period = 0;
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
}
error_done:
pr_debug("%s: End, ret=%d\n", __func__, ret);
p9468_chg_stats_update(chg_data, pca9468);
mutex_unlock(&pca9468->lock);
return ret;
}
/* Check Vbat minimum level to start direct charging */
static int pca9468_check_vbatmin(struct pca9468_charger *pca9468)
{
int ret = 0, vbat;
pr_debug("%s: =========START=========\n", __func__);
mutex_lock(&pca9468->lock);
if (pca9468->charging_state != DC_STATE_CHECK_VBAT)
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CHECK_VBAT);
pca9468->charging_state = DC_STATE_CHECK_VBAT;
vbat = pca9468_read_adc(pca9468, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* wait for CPM to send in the params */
if (pca9468->cc_max < 0 || pca9468->fv_uv < 0) {
pr_debug("%s: not yet fv_uv=%d, cc_max=%d vbat=%d\n", __func__,
pca9468->fv_uv, pca9468->cc_max, vbat);
/* retry again after 1sec */
pca9468->timer_id = TIMER_VBATMIN_CHECK;
pca9468->timer_period = PCA9468_VBATMIN_CHECK_T;
pca9468->retry_cnt += 1;
} else {
logbuffer_prlog(pca9468, LOGLEVEL_INFO,
"%s: starts at fv_uv=%d, cc_max=%d vbat=%d (min=%d)",
__func__, pca9468->fv_uv, pca9468->cc_max, vbat,
PCA9468_DC_VBAT_MIN);
pca9468->timer_id = TIMER_PRESET_DC;
pca9468->timer_period = 0;
pca9468->retry_cnt = 0; /* start charging */
}
/* timeout for VBATMIN or charging parameters */
if (pca9468->retry_cnt > PCA9468_MAX_RETRY_CNT) {
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: TIMEOUT fv_uv=%d, cc_max=%d vbat=%d limit=%d",
__func__, pca9468->fv_uv, pca9468->cc_max, vbat,
PCA9468_DC_VBAT_MIN);
ret = -ETIMEDOUT;
} else {
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
}
error:
mutex_unlock(&pca9468->lock);
pr_debug("%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int pca9468_send_message(struct pca9468_charger *pca9468)
{
int val, ret;
const int timer_id = pca9468->timer_id;
/* Go to the next state */
mutex_lock(&pca9468->lock);
pr_debug("%s: ====== START ======= \n", __func__);
/* 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 */
pr_debug("%s: ta_type=%d, ta_vol=%d\n", __func__,
pca9468->ta_type, pca9468->ta_vol);
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;
pr_debug("%s: ta_type=%d, ta_vol=%d ta_cur=%d\n", __func__,
pca9468->ta_type, pca9468->ta_vol, pca9468->ta_cur);
/* Send PD Message */
ret = pca9468_send_pd_message(pca9468, PD_MSG_REQUEST_APDO);
}
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;
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: charging_state=%u timer_id:%d->%d ret=%d",
__func__, pca9468->charging_state,
timer_id, pca9468->timer_id, ret);
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
pr_debug("%s: End: timer_id=%d timer_period=%lu\n", __func__,
pca9468->timer_id, pca9468->timer_period);
mutex_unlock(&pca9468->lock);
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);
unsigned int charging_state;
int timer_id;
int ret = 0;
pr_debug("%s: ========= START =========\n", __func__);
/* TODO: remove locks from the calls and run all of this locked */
mutex_lock(&pca9468->lock);
p9468_chg_stats_update(&pca9468->chg_data, pca9468);
charging_state = pca9468->charging_state;
timer_id = pca9468->timer_id;
pr_debug("%s: timer id=%d, charging_state=%u\n", __func__,
pca9468->timer_id, charging_state);
mutex_unlock(&pca9468->lock);
switch (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:
ret = pca9468_send_message(pca9468);
if (ret < 0)
goto error;
break;
/* called from 2 contexts */
case TIMER_ADJUST_TAVOL:
mutex_lock(&pca9468->lock);
if (pca9468->ta_type == TA_TYPE_WIRELESS)
ret = pca9468_adjust_rx_voltage(pca9468);
else
ret = pca9468_adjust_ta_voltage(pca9468);
if (ret < 0) {
mutex_unlock(&pca9468->lock);
goto error;
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
mutex_unlock(&pca9468->lock);
break;
/* called from 2 contexts */
case TIMER_ADJUST_TACUR:
mutex_lock(&pca9468->lock);
ret = pca9468_adjust_ta_current(pca9468);
if (ret < 0) {
mutex_unlock(&pca9468->lock);
goto error;
}
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
mutex_unlock(&pca9468->lock);
break;
case TIMER_ID_NONE:
ret = pca9468_stop_charging(pca9468);
if (ret < 0)
goto error;
break;
default:
break;
}
/* Check the charging state again */
if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
cancel_delayed_work(&pca9468->timer_work);
cancel_delayed_work(&pca9468->pps_work);
}
pr_debug("%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld\n",
__func__, timer_id, pca9468->timer_id, charging_state,
pca9468->charging_state, pca9468->timer_period);
return;
error:
pr_debug("%s: ========= ERROR =========\n", __func__);
logbuffer_prlog(pca9468, LOGLEVEL_ERR,
"%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld ret=%d",
__func__, timer_id, pca9468->timer_id, charging_state,
pca9468->charging_state, pca9468->timer_period, ret);
pca9468_stop_charging(pca9468);
}
/* 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: do other background stuff */
pr_debug("%s: ret=%d\n", __func__, ret);
}
static int pca9468_hw_ping(struct pca9468_charger *pca9468)
{
unsigned int val = 0;
int ret;
/* 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))
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=%#x ret=%d\n",
val, ret);
return -EINVAL;
}
return 0;
}
/* one and done in probe */
static int pca9468_hw_init(struct pca9468_charger *pca9468)
{
unsigned int val;
int ret;
/* 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;
/* Enable Reverse Current Detection, Active mode High, Force standby */
val = PCA9468_BIT_REV_IIN_DET | PCA9468_EN_ACTIVE_H |
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_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;
/* v float voltage */
ret = pca9468_set_vfloat(pca9468, pca9468->pdata->v_float);
if (ret < 0)
return ret;
/* Spread Spectrum settings */
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_ADC_CTRL,
PCA9468_BIT_SC_CLK_DITHER_RATE,
pca9468->pdata->sc_clk_dither_rate);
if (ret < 0)
return ret;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_NTC_TH_2,
PCA9468_SC_CLK_DITHER_LIMIT,
pca9468->pdata->sc_clk_dither_limit << 4);
if (ret < 0)
return ret;
val = pca9468->pdata->sc_clk_dither_en ? PCA9468_BIT_SC_CLK_DITHER_EN : 0;
ret = regmap_update_bits(pca9468->regmap, PCA9468_REG_TEMP_CTRL,
PCA9468_BIT_SC_CLK_DITHER_EN, val);
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;
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_write;
client->irq = irq;
return 0;
fail_write:
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 requested from GCPM */
static int get_const_charge_current(struct pca9468_charger *pca9468)
{
/* Charging current cannot be controlled directly */
return pca9468->cc_max;
}
/* Return the constant charge voltage programmed into the charger in uV. */
static int pca9468_const_charge_voltage(struct pca9468_charger *pca9468)
{
unsigned int val;
int ret;
if (!pca9468->mains_online)
return -ENODATA;
ret = regmap_read(pca9468->regmap, PCA9468_REG_V_FLOAT, &val);
if (ret < 0)
return ret;
return (val * 5 + 3725) * 1000;
}
#define get_boot_sec() div_u64(ktime_to_ns(ktime_get_boottime()), NSEC_PER_SEC)
/* index is the PPS source to use */
static int pca9468_set_charging_enabled(struct pca9468_charger *pca9468, int index)
{
if (index < 0 || index >= PPS_INDEX_MAX)
return -EINVAL;
mutex_lock(&pca9468->lock);
/* Done is detected in CV when iin goes UNDER topoff. */
if (pca9468->charging_state == DC_STATE_CHARGING_DONE)
index = 0;
if (index == 0) {
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: stop pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, pca9468->pps_index, index,
pca9468->charging_state,
pca9468->timer_id);
/* this is the same as stop charging */
pca9468->pps_index = 0;
cancel_delayed_work(&pca9468->timer_work);
cancel_delayed_work(&pca9468->pps_work);
/* will call pca9468_stop_charging() in timer_work() */
pca9468->timer_id = TIMER_ID_NONE;
pca9468->timer_period = 0;
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
} else if (pca9468->charging_state == DC_STATE_NO_CHARGING) {
logbuffer_prlog(pca9468, LOGLEVEL_DEBUG,
"%s: start pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, pca9468->pps_index, index,
pca9468->charging_state,
pca9468->timer_id);
/* Start Direct Charging on Index */
pca9468->dc_start_time = get_boot_sec();
p9468_chg_stats_init(&pca9468->chg_data);
pca9468->irdrop_comp_ok = false;
pca9468->pps_index = index;
dev_info(pca9468->dev, "%s: charging_state=%u->%u\n", __func__,
pca9468->charging_state, DC_STATE_CHECK_VBAT);
/* PD is already in PE_SNK_STATE */
pca9468->charging_state = DC_STATE_CHECK_VBAT;
pca9468->timer_id = TIMER_VBATMIN_CHECK;
pca9468->timer_period = 0;
mod_delayed_work(pca9468->dc_wq, &pca9468->timer_work,
msecs_to_jiffies(pca9468->timer_period));
/* Set the initial charging step */
power_supply_changed(pca9468->mains);
}
mutex_unlock(&pca9468->lock);
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 = false;
} else if (pca9468->mains_online == false) {
pca9468->mains_online = true;
}
break;
/* TODO: locking is wrong */
case GBMS_PROP_CHARGING_ENABLED:
ret = pca9468_set_charging_enabled(pca9468, val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = pca9468_set_new_vfloat(pca9468, val->intval);
break;
/*
* pcaA9468 cannot control charging current directly so need to control
* current on TA side resolving cc_max for TA_VOL*TA_CUT on vbat.
* NOTE: iin should be equivalent to iin = cc_max /2
*/
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = pca9468_set_new_cc_max(pca9468, val->intval);
break;
/* CURRENT MAX, same as IIN is really only set by the algo */
case POWER_SUPPLY_PROP_CURRENT_MAX:
pr_debug("%s: set iin %d, ignore\n", __func__, val->intval);
break;
/* allow direct setting, not used */
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
mutex_lock(&pca9468->lock);
ret = pca9468_set_new_iin(pca9468, val->intval);
mutex_unlock(&pca9468->lock);
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, rc, 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 = pca9468_get_charging_enabled(pca9468);
if (ret < 0)
return ret;
val->intval = !ret;
break;
case GBMS_PROP_CHARGING_ENABLED:
ret = pca9468_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 = pca9468_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;
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* return the output current - uA unit */
rc = pca9468_get_iin(pca9468, &val->intval);
if (rc < 0)
dev_err(pca9468->dev, "Invalid IIN ADC (%d)\n", rc);
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 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 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_max);
if (ret) {
pr_warn("%s: pca9468,input-current-limit is Empty\n", __func__);
pdata->iin_cfg_max = PCA9468_IIN_CFG_DFT;
}
pdata->iin_cfg = pdata->iin_cfg_max;
pr_info("%s: pca9468,iin_cfg is %u\n", __func__, pdata->iin_cfg);
/* charging float voltage */
ret = of_property_read_u32(np_pca9468, "pca9468,float-voltage",
&pdata->v_float_dt);
if (ret) {
pr_warn("%s: pca9468,float-voltage is Empty\n", __func__);
pdata->v_float_dt = PCA9468_VFLOAT_DFT;
}
pdata->v_float = pdata->v_float_dt;
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);
/* iin offsets */
ret = of_property_read_u32(np_pca9468, "pca9468,iin-max-offset",
&pdata->iin_max_offset);
if (ret)
pdata->iin_max_offset = PCA9468_IIN_MAX_OFFSET;
pr_info("%s: pca9468,iin_max_offset is %u\n", __func__, pdata->iin_max_offset);
ret = of_property_read_u32(np_pca9468, "pca9468,iin-cc_comp-offset",
&pdata->iin_cc_comp_offset);
if (ret)
pdata->iin_cc_comp_offset = PCA9468_IIN_CC_COMP_OFFSET;
pr_info("%s: pca9468,iin_cc_comp_offset is %u\n", __func__, pdata->iin_cc_comp_offset);
/* irdrop limits */
pdata->irdrop_limit_cnt =
of_property_count_elems_of_size(np_pca9468, "google,irdrop-limits", sizeof(u32));
if (pdata->irdrop_limit_cnt < PCA9468_IRDROP_LIMIT_CNT) {
pr_info("%s: google,irdrop-limits size get failed, use default irdrop limits %d\n",
__func__, pdata->irdrop_limit_cnt);
ret = -EINVAL;
} else {
ret = of_property_read_u32_array(np_pca9468, "google,irdrop-limits",
(u32 *)pdata->irdrop_limits,
PCA9468_IRDROP_LIMIT_CNT);
if (ret)
pr_info("%s: google,irdrop-limits get failed, use default irdrop limits",
__func__);
}
if (ret) {
pdata->irdrop_limits[0] = PCA9468_IRDROP_LIMIT_TIER1;
pdata->irdrop_limits[1] = PCA9468_IRDROP_LIMIT_TIER2;
pdata->irdrop_limits[2] = PCA9468_IRDROP_LIMIT_TIER3;
}
/* Spread Spectrum settings */
ret = of_property_read_u32(np_pca9468, "pca9468,sc-clk-dither-rate",
&pdata->sc_clk_dither_rate);
if (ret)
pdata->sc_clk_dither_rate = PCA9468_SC_CLK_DITHER_RATE_DEF;
else
pr_info("%s: pca9468,sc-clk-dither-rate is %u\n", __func__,
pdata->sc_clk_dither_rate);
ret = of_property_read_u32(np_pca9468, "pca9468,sc-clk-dither-limit",
&pdata->sc_clk_dither_limit);
if (ret)
pdata->sc_clk_dither_limit = PCA9468_SC_CLK_DITHER_LIMIT_DEF;
else
pr_info("%s: pca9468,sc-clk-dither-limit is %u\n", __func__,
pdata->sc_clk_dither_limit);
pdata->sc_clk_dither_en = of_property_read_bool(np_pca9468, "pca9468,spread-spectrum");
pr_info("%s: pca9468,spread-spectrum is %u\n", __func__, pdata->sc_clk_dither_en);
#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_apply_offsets(void *data, u64 val)
{
struct pca9468_charger *chip = data;
int ret;
ret = pca9468_set_new_cc_max(chip, chip->cc_max);
pr_info("Apply offsets iin_max_o=%d iin_cc_comp_o=%d ret=%d\n",
chip->pdata->iin_max_offset, chip->pdata->iin_cc_comp_offset,
ret);
return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(apply_offsets_debug_ops, NULL, debug_apply_offsets, "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 pca9468_set_charging_enabled(pca9468, (int)val);
}
DEFINE_SIMPLE_ATTRIBUTE(debug_pps_index_ops, debug_pps_index_get,
debug_pps_index_set, "%llu\n");
static ssize_t show_sts_ab(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pca9468_charger *pca9468 = dev_get_drvdata(dev);
u8 tmp[2];
int ret;
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_STS_A, &tmp, sizeof(tmp));
if (ret < 0)
return ret;
return scnprintf(buf, PAGE_SIZE, "%02x%02x\n", tmp[0], tmp[1]);
}
static DEVICE_ATTR(sts_ab, 0444, show_sts_ab, NULL);
static ssize_t p9468_show_chg_stats(struct device *dev, struct device_attribute *attr,
char *buff)
{
struct i2c_client *client = to_i2c_client(dev);
struct pca9468_charger *pca9468 = i2c_get_clientdata(client);
struct p9468_chg_stats *chg_data = &pca9468->chg_data;
const int max_size = PAGE_SIZE;
int len = -ENODATA;
mutex_lock(&pca9468->lock);
if (!p9468_chg_stats_valid(chg_data))
goto exit_done;
len = scnprintf(buff, max_size,
"D:%#x,%#x %#x,%#x,%#x,%#x,%#x\n",
chg_data->adapter_capabilities[0],
chg_data->adapter_capabilities[1],
chg_data->receiver_state[0],
chg_data->receiver_state[1],
chg_data->receiver_state[2],
chg_data->receiver_state[3],
chg_data->receiver_state[4]);
len += scnprintf(&buff[len], max_size - len,
"N: ovc=%d,ovc_ibatt=%d,ovc_delta=%d rcp=%d,stby=%d\n",
chg_data->ovc_count, chg_data->ovc_max_ibatt, chg_data->ovc_max_delta,
chg_data->rcp_count,
chg_data->stby_count);
len += scnprintf(&buff[len], max_size - len,
"C: nc=%d,pre=%d,ca=%d,cc=%d,cv=%d,adj=%d\n",
chg_data->nc_count,
chg_data->pre_count,
chg_data->ca_count,
chg_data->cc_count,
chg_data->cv_count,
chg_data->adj_count);
exit_done:
mutex_unlock(&pca9468->lock);
return len;
}
static ssize_t p9468_set_chg_stats(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct pca9468_charger *pca9468 = i2c_get_clientdata(client);
mutex_lock(&pca9468->lock);
p9468_chg_stats_init(&pca9468->chg_data);
mutex_unlock(&pca9468->lock);
return count;
}
static DEVICE_ATTR(chg_stats, 0644, p9468_show_chg_stats, p9468_set_chg_stats);
static ssize_t show_dump_reg(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct pca9468_charger *pca9468 = dev_get_drvdata(dev);
u8 tmp[PCA9468_MAX_REGISTER + 1];
int ret, i;
int len = 0;
ret = regmap_bulk_read(pca9468->regmap, PCA9468_REG_DEVICE_INFO, &tmp,
PCA9468_MAX_REGISTER + 1);
if (ret < 0)
return ret;
for (i = 0; i <= PCA9468_MAX_REGISTER; i++)
len += scnprintf(&buf[len], PAGE_SIZE - len, "%02x: %02x\n", i, tmp[i]);
return len;
}
static DEVICE_ATTR(registers_dump, 0444, show_dump_reg, NULL);
static int pca9468_create_fs_entries(struct pca9468_charger *chip)
{
device_create_file(chip->dev, &dev_attr_sts_ab);
device_create_file(chip->dev, &dev_attr_chg_stats);
device_create_file(chip->dev, &dev_attr_registers_dump);
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_bool("wlc_rampout_iin", 0644, chip->debug_root,
&chip->wlc_ramp_out_iin);
debugfs_create_u32("wlc_rampout_delay", 0644, chip->debug_root,
&chip->wlc_ramp_out_delay);
debugfs_create_u32("wlc_rampout_vout_target", 0644, chip->debug_root,
&chip->wlc_ramp_out_vout_target);
debugfs_create_u32("debug_level", 0644, chip->debug_root,
&debug_printk_prlog);
debugfs_create_u32("no_logbuffer", 0644, chip->debug_root,
&debug_no_logbuffer);
debugfs_create_file("data", 0644, chip->debug_root, chip, &register_debug_ops);
debugfs_create_x32("address", 0644, chip->debug_root, &chip->debug_address);
debugfs_create_u32("iin_max_offset", 0644, chip->debug_root,
&chip->pdata->iin_max_offset);
debugfs_create_u32("iin_cc_comp_offset", 0644, chip->debug_root,
&chip->pdata->iin_cc_comp_offset);
debugfs_create_file("apply_offsets", 0644, chip->debug_root, chip,
&apply_offsets_debug_ops);
chip->debug_adc_channel = ADCCH_VOUT;
debugfs_create_file("adc_chan", 0644, chip->debug_root, chip,
&debug_adc_chan_ops);
debugfs_create_file("pps_index", 0644, chip->debug_root, chip,
&debug_pps_index_ops);
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;
const char *psy_name = NULL;
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;
pca9468_chg->wlc_ramp_out_iin = true;
pca9468_chg->wlc_ramp_out_vout_target = 15300000; /* 15.3V as default */
pca9468_chg->wlc_ramp_out_delay = 250; /* 250 ms default */
/* 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);
ret = of_property_read_string(dev->of_node,
"pca9468,psy_name", &psy_name);
if ((ret == 0) && (strlen(psy_name) > 0))
pca9468_regmap.name = pca9468_mains_desc.name =
devm_kstrdup(dev, psy_name, GFP_KERNEL);
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);
} else {
const char *logname = "pca9468";
pca9468_chg->log = logbuffer_register(logname);
if (IS_ERR(pca9468_chg->log)) {
pr_err("%s: no logbuffer (%ld)\n", __func__,
PTR_ERR(pca9468_chg->log));
pca9468_chg->log = NULL;
}
}
ret = pca9468_hw_ping(pca9468_chg);
if (ret < 0)
goto error;
/* TODO: only enable ADC if usb_tz_name is defined */
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_fs_entries(pca9468_chg);
if (ret < 0)
dev_err(dev, "error while registering debugfs %d\n", ret);
#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);
}
destroy_workqueue(pca9468_chg->dc_wq);
wakeup_source_unregister(pca9468_chg->monitor_wake_lock);
#ifdef CONFIG_THERMAL
if (pca9468_chg->usb_tzd)
thermal_zone_device_unregister(pca9468_chg->usb_tzd);
#endif
if (pca9468_chg->log)
logbuffer_unregister(pca9468_chg->log);
pps_free(&pca9468_chg->pps_data);
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 <clark.kim@nxp.com>");
MODULE_AUTHOR("AleX Pelosi <apelosi@google.com>");
MODULE_AUTHOR("Wasb Liu <wasbliu@google.com>");
MODULE_DESCRIPTION("PCA9468 gcharger driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("3.7.0");