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android / kernel / google-modules / bms / 1379ca1240770aad06098b0d6afc9ec877a83f79 / . / hl7132_charger.c
blob: 28cfc3a5dda13e77d0ca1955fff1899fb6db560f [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for the HL7132 battery charger.
*
* Copyright (C) 2024 Google, LLC.
*/
#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 <misc/gvotable.h>
#include "hl7132_regs.h"
#include "hl7132_charger.h"
#if defined(CONFIG_OF)
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#endif /* CONFIG_OF */
/* Timer definition */
#define HL7132_VBATMIN_CHECK_T 1000 /* 1000ms */
#define HL7132_CCMODE_CHECK1_T 5000 /* 10000ms -> 500ms */
#define HL7132_CCMODE_CHECK2_T 5000 /* 5000ms */
#define HL7132_CVMODE_CHECK_T 10000 /* 10000ms */
#define HL7132_ENABLE_DELAY_T 150 /* 150ms */
#define HL7132_CVMODE_CHECK2_T 1000 /* 1000ms */
/* Battery Threshold */
#define HL7132_DC_VBAT_MIN 3400000 /* uV */
/* Input Current Limit default value */
#define HL7132_IIN_CFG_DFT 3000000 /* uA*/
/* Charging vbat_reg default value */
#define HL7132_VBAT_REG_DFT 4350000 /* uV */
/* Charging vbat_reg max voltage value */
#define HL7132_COMP_VFLOAT_MAX 4600000 /* uV */
/* Sense Resistance default value */
#define HL7132_SENSE_R_DFT 1 /* 10mOhm */
/* Switching Frequency default value */
#define HL7132_FSW_CFG_DFT 3 /* 980KHz */
/* NTC threshold voltage default value */
#define HL7132_NTC_TH_DFT 0 /* uV*/
/* Charging Done Condition */
#define HL7132_IIN_DONE_DFT 500000 /* uA */
/* parallel charging done condition */
#define HL7132_IIN_P_DONE 1000000 /* uA */
/* Parallel charging default threshold */
#define HL7132_IIN_P_TH_DFT 4000000 /* uA */
/* Single charging default threshold */
#define HL7132_IIN_S_TH_DFT 10000000 /* uA */
/* Maximum TA voltage threshold */
#define HL7132_TA_MAX_VOL 9800000 /* uV */
/* Maximum TA current threshold, set to max(cc_max) / 2 */
#define HL7132_TA_MAX_CUR 2600000 /* uA */
/* Minimum TA current threshold */
#define HL7132_TA_MIN_CUR 1000000 /* uA - PPS minimum current */
/* Minimum TA voltage threshold in Preset mode */
#define HL7132_TA_MIN_VOL_PRESET 8000000 /* uV */
/* TA voltage threshold starting Adjust CC mode */
#define HL7132_TA_MIN_VOL_CCADJ 8500000 /* 8000000uV --> 8500000uV */
#define HL7132_TA_VOL_PRE_OFFSET 500000 /* uV */
/* Adjust CC mode TA voltage step */
#define HL7132_TA_VOL_STEP_ADJ_CC 40000 /* uV */
/* Pre CV mode TA voltage step */
#define HL7132_TA_VOL_STEP_PRE_CV 20000 /* uV */
/* IIN_CC adc offset for accuracy */
#define HL7132_IIN_ADC_OFFSET 20000 /* uA */
/* IIN_CC compensation offset */
#define HL7132_IIN_CC_COMP_OFFSET 25000 /* uA */
/* IIN_CC compensation offset in Power Limit Mode(Constant Power) TA */
#define HL7132_IIN_CC_COMP_OFFSET_CP 20000 /* uA */
/* TA maximum voltage that can support CC in Constant Power Mode */
#define HL7132_TA_MAX_VOL_CP 9800000 /* 9760000uV --> 9800000uV */
/* Offset for cc_max / 2 */
#define HL7132_IIN_MAX_OFFSET 0
/* Offset for TA max current */
#define HL7132_TA_CUR_MAX_OFFSET 200000 /* uA */
/* 0.6V - above this the chip is enabled, below it is disabled via a
* "thermal shutdown"
*/
#define HL7132_TS_ENABLE_THRESHOLD 600000
/* maximum retry counter for restarting charging or initializing */
#define HL7132_MAX_RETRY_CNT 3 /* retries */
/* TA IIN tolerance */
#define HL7132_TA_IIN_OFFSET 100000 /* uA */
/* IIN_CC upper protection offset in Power Limit Mode TA */
#define HL7132_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 */
#define HL7132_OTV_MARGIN 12000 /* uV */
#define HL7132_TIER_SWITCH_DELTA 25000 /* uV */
/* INT1 Register Buffer */
enum {
REG_INT1,
REG_INT1_MSK,
REG_INT1_STS,
REG_INT1_MAX
};
/* STS Register Buffer */
enum {
REG_STS_A,
REG_STS_B,
REG_STS_C,
REG_STS_D,
REG_STS_MAX
};
/* Status */
enum {
STS_MODE_CHG_LOOP, /* TODO: There is no such thing */
STS_MODE_VFLT_LOOP,
STS_MODE_IIN_LOOP,
STS_MODE_IBAT_LOOP,
STS_MODE_LOOP_INACTIVE,
STS_MODE_TEMP_REG,
STS_MODE_CHG_DONE,
STS_MODE_VIN_UVLO,
STS_MODE_UNKNOWN
};
/* 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,
};
/* ------------------------------------------------------------------------ */
static int hl7132_hw_ping(struct hl7132_charger *hl7132)
{
unsigned int val = 0;
int ret;
/* Read Device info register to check the incomplete I2C operation */
ret = regmap_read(hl7132->regmap, HL7132_REG_DEVICE_ID, &val);
val = val & HL7132_BIT_DEV_ID;
if ((ret < 0) || (val != HL7132_DEVICE_ID)) {
ret = regmap_read(hl7132->regmap, HL7132_REG_DEVICE_ID, &val);
val = val & HL7132_BIT_DEV_ID;
}
if ((ret < 0) || (val != HL7132_DEVICE_ID)) {
dev_err(hl7132->dev,
"reading DEVICE_ID failed, val=%#x ret=%d\n",
val, ret);
return -EINVAL;
}
return 0;
}
/* HW integration guide section 4
* call holding mutex_lock(&hl7132->lock)
*/
static int hl7132_hw_init(struct hl7132_charger *hl7132)
{
int ret = 0;
unsigned int reg_value;
unsigned int reg_ctrl_0, reg_ctrl_1, track_ov_uv, ctrl_0;
unsigned int vbat_ovp_th, iin_ocp_th, iin_ucp_th;
unsigned int track_ov, track_uv;
/* HW integration guide section 4.1.1 */
dev_info(hl7132->dev, "%s: Triggering soft reset\n", __func__);
regmap_update_bits(hl7132->regmap, HL7132_REG_CTRL_2,
HL7132_BITS_SFT_RST,
HL7132_SFT_RESET << MASK2SHIFT(HL7132_BITS_SFT_RST));
/* regmap_update_bits will always report a failure after soft reset,
* so confirm that it succeeded by making sure HL7132_REG_CTRL_2 is back
* to default after waiting for soft reset to complete - chip holds I2C
* BUS for ~6ms after reset is triggered. Wait 100ms as per HW
* integration guide.
*/
msleep(hl7132->pdata->init_sleep);
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_2, &reg_value);
msleep(20);
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_2, &reg_value);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read after soft reset\n",
__func__);
return ret;
}
if (reg_value != HL7132_CTRL_2_DFT) {
dev_err(hl7132->dev, "%s: Failed to perform soft reset\n",
__func__);
return ret;
}
/* HW integration guide section 4.2.1 - check device ID */
if (hl7132_hw_ping(hl7132))
return ret;
/* HW integration guide section 4.2.2 - Set TSBAT_EN_PIN - enable TS
* protection and set thresholds
*/
/* (used for HW integration guide section 5.6 - TBAT error control) */
ret = regmap_update_bits(hl7132->regmap, HL7132_REG_CTRL_1,
HL7132_BIT_TS_PROT_EN, HL7132_BIT_TS_PROT_EN);
if (ret < 0)
return ret;
ret = regmap_write(hl7132->regmap, HL7132_REG_TS0_TH_0,
HL7132_TS0_TH_0_INIT_DFT);
if (ret < 0)
return ret;
ret = regmap_write(hl7132->regmap, HL7132_REG_TS0_TH_1,
HL7132_TS0_TH_1_INIT_DFT);
if (ret < 0)
return ret;
/* TODO discussing with HW
* HW integration guide section 4.2.7 - set VIN_UV_SEL to 1
*/
//ret = regmap_update_bits(hl7132->regmap, HL7132_REG_CTRL_1,
// HL7132_BIT_VIN_UV_SEL, HL7132_BIT_VIN_UV_SEL);
//if (ret < 0)
// return ret;
/* HW integration guide section 4.2.3 - Disable IBAT OCP */
ret = regmap_update_bits(hl7132->regmap, HL7132_REG_IBAT_REG,
HL7132_BIT_IBAT_OCP_DIS, 1);
if (ret < 0)
return ret;
/* HW integration guide section 4.2.4 - Confirm default protection thresholds */
ret = regmap_read(hl7132->regmap, HL7132_REG_REG_CTRL_0, &reg_ctrl_0);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read REG_CTRL_0, ret=%d\n",
__func__, ret);
return ret;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_REG_CTRL_1, &reg_ctrl_1);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read REG_CTRL_1, ret=%d\n",
__func__, ret);
return ret;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_TRACK_OV_UV, &track_ov_uv);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read TRACK_OV, ret=%d\n",
__func__, ret);
return ret;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_0, &ctrl_0);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read CTRL_0, ret=%d\n",
__func__, ret);
return ret;
}
vbat_ovp_th = (reg_ctrl_1 & HL7132_BITS_VBAT_OVP_TH) >> MASK2SHIFT(HL7132_BITS_VBAT_OVP_TH);
if ((vbat_ovp_th) != HL7132_VBAT_OVP_TH_DFT) {
dev_warn(hl7132->dev,
"%s: Unexpected VBAT_OVP_TH value (0x%02x, expected 0x%02x)\n",
__func__, vbat_ovp_th, HL7132_VBAT_OVP_TH_DFT);
return -EINVAL;
}
iin_ocp_th = (reg_ctrl_0 & HL7132_BITS_IIN_OCP_TH) >> MASK2SHIFT(HL7132_BITS_IIN_OCP_TH);
if (iin_ocp_th != HL7132_IIN_OCP_TH_DFT) {
dev_warn(hl7132->dev,
"%s: Unexpected IIN_OCP_TH value (0x%02x, expected 0x%02x)\n",
__func__, iin_ocp_th, HL7132_IIN_OCP_TH_DFT);
return -EINVAL;
}
iin_ucp_th = (ctrl_0 & HL7132_BITS_IIN_UCP_TH) >> MASK2SHIFT(HL7132_BITS_IIN_UCP_TH);
if (iin_ucp_th != HL7132_IIN_UCP_TH_DFT) {
dev_warn(hl7132->dev,
"%s: Unexpected IIN_UCP_TH value (0x%02x, expected 0x%02x)\n",
__func__, iin_ucp_th, HL7132_IIN_UCP_TH_DFT);
return -EINVAL;
}
track_ov = (track_ov_uv & HL7132_BITS_TRACK_OV) >> MASK2SHIFT(HL7132_BITS_TRACK_OV);
if (track_ov != HL7132_TRACK_OV_DFT) {
dev_warn(hl7132->dev,
"%s: Unexpected TRACK_OV value (0x%02x, expected 0x%02x)\n",
__func__, track_ov, HL7132_TRACK_OV_DFT);
return -EINVAL;
}
track_uv = (track_ov_uv & HL7132_BITS_TRACK_UV) >> MASK2SHIFT(HL7132_BITS_TRACK_UV);
if (track_uv != HL7132_TRACK_UV_DFT) {
dev_warn(hl7132->dev,
"%s: Unexpected TRACK_UV value (0x%02x, expected 0x%02x)\n",
__func__, track_uv, HL7132_TRACK_UV_DFT);
return -EINVAL;
}
/* HW integration guide section 4.2.5 */
/* Unmask TS_TEMP interrupt */
ret = regmap_update_bits(hl7132->regmap, HL7132_REG_INT_MSK,
HL7132_BIT_TS_TEMP_M, 0);
if (ret < 0)
return ret;
/* Clear interrupt flags (read to clear) */
ret = regmap_read(hl7132->regmap, HL7132_REG_INT, &reg_value);
if (ret < 0)
return ret;
/* HW integration guide section 4.2.6 */
/* Disable unused ADC channels */
ret = regmap_write(hl7132->regmap, HL7132_REG_ADC_CTRL_1,
HL7132_ADC_CTRL_1_INIT_DFT);
if (ret < 0)
return ret;
/* Enable ADC */
ret = regmap_update_bits(hl7132->regmap, HL7132_REG_ADC_CTRL_0,
HL7132_BIT_ADC_EN, HL7132_BIT_ADC_EN);
if (ret < 0)
return ret;
return 0;
}
/* HW integration guide section 5.2 Check SC Initialize Condition */
static int hl7132_check_init(struct hl7132_charger *hl7132)
{
int ret;
unsigned int reg_value;
/* HW integration guide section 5.2.1 */
ret = regmap_read(hl7132->regmap, HL7132_REG_IBAT_REG, &reg_value);
if (ret < 0 || reg_value != HL7132_IBAT_REG_DFT) {
dev_err(hl7132->dev,
"%s: IBAT_REG not configured correctly (0x%02x, expected 0x%02x)\n",
__func__, reg_value, HL7132_IBAT_REG_DFT);
return -EINVAL;
}
/* HW integration guide section 5.2.2 */
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_1, &reg_value);
if (ret < 0 || reg_value != HL7132_REG_CTRL_1_INIT_DFT) {
dev_err(hl7132->dev,
"%s: CTRL_1 not configured correctly (0x%02x, expected 0x%02x)\n",
__func__, reg_value, HL7132_REG_CTRL_1_INIT_DFT);
return -EINVAL;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_TS0_TH_0, &reg_value);
if (ret < 0 || reg_value != HL7132_TS0_TH_0_INIT_DFT) {
dev_err(hl7132->dev,
"%s: TS0_TH_0 not configured correctly (0x%02x, expected 0x%02x)\n",
__func__, reg_value, HL7132_TS0_TH_0_INIT_DFT);
return -EINVAL;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_TS0_TH_1, &reg_value);
if (ret < 0 || reg_value != HL7132_TS0_TH_1_INIT_DFT) {
dev_err(hl7132->dev,
"%s: TS0_TH_1 not configured correctly (0x%02x, expected 0x%02x)\n",
__func__, reg_value, HL7132_TS0_TH_1_INIT_DFT);
return -EINVAL;
}
/* HW integration guide section 5.2.3 */
ret = regmap_read(hl7132->regmap, HL7132_REG_ADC_CTRL_0, &reg_value);
if (ret < 0 || reg_value != HL7132_BIT_ADC_EN) {
dev_err(hl7132->dev,
"%s: ADC_CTRL_0 not configured correctly (0x%02x, expected 0x%02lx)\n",
__func__, reg_value, HL7132_BIT_ADC_EN);
return -EINVAL;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_ADC_CTRL_1, &reg_value);
if (ret < 0 || reg_value != HL7132_ADC_CTRL_1_INIT_DFT) {
dev_err(hl7132->dev,
"%s: ADC_CTRL_1 not configured correctly (0x%02x, expected 0x%02lx)\n",
__func__, reg_value, HL7132_ADC_CTRL_1_INIT_DFT);
return -EINVAL;
}
/* Section 5.3.1 - do here to consolidate initialization checks since
* VIN_OVP isn't being changed between 5.2 and 5.3
*/
ret = regmap_read(hl7132->regmap, HL7132_REG_VIN_OVP, &reg_value);
if (ret < 0 || reg_value != HL7132_VIN_OVP_DFT) {
dev_err(hl7132->dev,
"%s: REG_VIN_OVP not configured correctly (0x%02x, expected 0x%02x)\n",
__func__, reg_value, HL7132_VIN_OVP_DFT);
return -EINVAL;
}
/* Section 5.3.2 - do here to consolidate initialization checks since
* REG_CTRL_0 / IIN_OCP_TH isn't being changed
*/
ret = regmap_read(hl7132->regmap, HL7132_REG_REG_CTRL_0, &reg_value);
reg_value = (reg_value & HL7132_BITS_IIN_OCP_TH) >> MASK2SHIFT(HL7132_BITS_IIN_OCP_TH);
if (ret < 0 || reg_value != HL7132_IIN_OCP_TH_DFT) {
dev_err(hl7132->dev,
"%s: REG_OCP_TH not configured correctly (0x%02x, expected 0x%02x)\n",
__func__, reg_value, HL7132_IIN_OCP_TH_DFT);
return -EINVAL;
}
return 0;
}
/* HW integration guide section 5.4.5 read ADC values */
/* ADC Read function, return uV or uA */
int hl7132_read_adc(struct hl7132_charger *hl7132, u8 adc_ch)
{
u8 reg_data[2];
u16 raw_adc = 0;
int conv_adc = -1;
int ret;
switch (adc_ch) {
case ADCCH_VIN:
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_ADC_VIN_0, reg_data, 2);
if (ret < 0)
goto error;
raw_adc = ((reg_data[0] << 2) | (reg_data[1] & HL7132_BITS_ADC_VIN_LSB));
conv_adc = raw_adc * HL7132_VIN_STEP;
break;
case ADCCH_IIN:
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_ADC_IIN_0, reg_data, 2);
if (ret < 0)
goto error;
raw_adc = ((reg_data[0] << 2) | (reg_data[1] & HL7132_BITS_ADC_IIN_LSB));
conv_adc = raw_adc * HL7132_IIN_STEP;
break;
case ADCCH_VBAT:
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_ADC_VBAT_0, reg_data, 2);
if (ret < 0)
goto error;
raw_adc = ((reg_data[0] << 2) | (reg_data[1] & HL7132_BITS_ADC_VBAT_LSB));
conv_adc = raw_adc * HL7132_VBAT_STEP;
break;
/* case ADCCH_IBAT: not needed */
case ADCCH_VTS:
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_ADC_VTS_0, reg_data, 2);
if (ret < 0)
goto error;
raw_adc = ((reg_data[0] << 2) | (reg_data[1] & HL7132_BITS_ADC_VTS_LSB));
conv_adc = raw_adc * HL7132_VTS_STEP;
break;
case ADCCH_VOUT:
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_ADC_VOUT_0, reg_data, 2);
if (ret < 0)
goto error;
raw_adc = ((reg_data[0] << 2) | (reg_data[1] & HL7132_BITS_ADC_VOUT_LSB));
conv_adc = raw_adc * HL7132_VOUT_STEP;
break;
case ADCCH_TDIE:
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_ADC_TDIE_0, reg_data, 2);
if (ret < 0)
goto error;
raw_adc = ((reg_data[0] << 2) | (reg_data[1] & HL7132_BITS_ADC_TDIE_LSB));
conv_adc = raw_adc * HL7132_TDIE_STEP / HL7132_TDIE_DENOM;
break;
default:
conv_adc = -EINVAL;
break;
}
error:
/* if disabled a channel, re-enable it in -> HL7132_REG_ADC_CTRL_1 */
dev_dbg(hl7132->dev, "%s: adc_ch=%u, raw_adc=%x convert_val=%d\n",
__func__, adc_ch, raw_adc, conv_adc);
return conv_adc;
}
/* vbat_reg voltage (10 mV) resolution */
static int hl7132_set_vbat_reg(struct hl7132_charger *hl7132,
unsigned int vbat_reg)
{
const int val = HL7132_VBAT_REG(vbat_reg);
int ret;
ret = regmap_write(hl7132->regmap, HL7132_REG_VBAT_REG, val);
dev_info(hl7132->dev, "%s: vbat_reg=%u (%d)\n", __func__, vbat_reg, ret);
return ret;
}
static int hl7132_set_input_current(struct hl7132_charger *hl7132,
unsigned int iin)
{
int ret, val;
/* round-up and increase one step */
iin = iin + PD_MSG_TA_CUR_STEP;
val = HL7132_IIN_CFG(iin);
/* Set IIN_CFG to one step higher */
val = val + 1;
/* If value goes above max, HW clamps to 3.5A */
ret = regmap_update_bits(hl7132->regmap, HL7132_REG_IIN_REG,
HL7132_BITS_IIN_REG_TH, val);
dev_info(hl7132->dev, "%s: iin=%d real iin_cfg=%d (%d)\n", __func__,
iin, val * HL7132_IIN_CFG_STEP, ret);
return ret;
}
static inline bool hl7132_can_inc_ta_cur(struct hl7132_charger *hl7132)
{
return hl7132->ta_cur + PD_MSG_TA_CUR_STEP < min(hl7132->ta_max_cur,
hl7132->iin_cc + HL7132_TA_CUR_MAX_OFFSET);
}
/* Returns the enable or disable value. into 1 or 0. */
static int hl7132_get_charging_enabled(struct hl7132_charger *hl7132)
{
int sts = 0;
int ret = 0;
int chg_state;
ret = regmap_read(hl7132->regmap, HL7132_REG_INT_STS_A, &sts);
if (ret < 0)
return ret;
chg_state = sts >> 6;
if (chg_state == STATE_CHG_STS_ACTIVE)
return 1;
return 0;
}
/* HW integration guide section 5.5 - Disable charging */
/* call holding mutex_lock(&hl7132->lock); */
static int hl7132_set_charging(struct hl7132_charger *hl7132, bool enable)
{
int ret = 0;
int value = 0;
unsigned int r_val = 0;
if (enable)
value = HL7132_BIT_CHG_EN;
ret = regmap_update_bits(hl7132->regmap, HL7132_REG_CTRL_0,
HL7132_BIT_CHG_EN, value);
if (ret < 0)
goto Err;
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_0, &r_val);
Err:
dev_dbg(hl7132->dev, "%s: End, ret=%d, r_val=[%x]\n", __func__, ret, r_val);
return ret;
}
static int hl7132_check_state(u8 val[8], struct hl7132_charger *hl7132, int loglevel)
{
int ret, vin, vout, vbat, iin, tdie, ts;
/* Dump registers from INT to STATUS_C */
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_INT,
&val[HL7132_REG_INT], 7);
if (ret < 0)
return ret;
logbuffer_prlog(hl7132, loglevel,
"%s: INT: %#02x, INT_MSK: %#02x, INT_STS_A: %#02x, INT_STS_B: %#02x, STATUS_A: %#02x, STATUS_B: %#02x, STATUS_C: %#02x\n",
__func__, val[HL7132_REG_INT], val[HL7132_REG_INT_MSK],
val[HL7132_REG_INT_STS_A], val[HL7132_REG_INT_STS_B],
val[HL7132_REG_STATUS_A], val[HL7132_REG_STATUS_B],
val[HL7132_REG_STATUS_C]);
vin = hl7132_read_adc(hl7132, ADCCH_VIN);
vout = hl7132_read_adc(hl7132, ADCCH_VOUT);
vbat = hl7132_read_adc(hl7132, ADCCH_VBAT);
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
tdie = hl7132_read_adc(hl7132, ADCCH_TDIE);
ts = hl7132_read_adc(hl7132, ADCCH_VTS);
logbuffer_prlog(hl7132, loglevel,
"%s: vin: %d, vout: %d, vbat: %d, iin: %d, tdie: %d, ts: %d\n",
__func__, vin, vout, vbat, iin, tdie, ts);
return 0;
}
/* HW integration guide section 5.4.4.b report failure information */
/* HL7132 is not active state - standby or shutdown */
/* Stop charging in timer_work */
/* return 0 when no error is detected */
static int hl7132_check_not_active(struct hl7132_charger *hl7132)
{
u8 val[8]; /* INT to STATUS_C */
int ret;
unsigned int masked_reg;
ret = hl7132_check_state(val, hl7132, LOGLEVEL_WARNING);
if (ret < 0) {
dev_err(hl7132->dev, "%s: cannot read state\n", __func__);
return ret;
}
if ((val[HL7132_REG_INT_STS_B] & HL7132_BIT_V_NOT_OK_STS) == HL7132_BIT_V_NOT_OK_STS) {
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: VOK is invalid", __func__);
if (val[HL7132_REG_STATUS_A] & HL7132_BIT_VIN_OVP_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: VIN OVP", __func__);
else if (val[HL7132_REG_STATUS_A] & HL7132_BIT_VIN_UVLO_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: VIN UVLO", __func__);
else if (val[HL7132_REG_STATUS_A] & HL7132_BIT_TRACK_OV_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: TRACK OVP", __func__);
else if (val[HL7132_REG_STATUS_A] & HL7132_BIT_TRACK_UV_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: TRACK UVP", __func__);
else if (val[HL7132_REG_STATUS_A] & HL7132_BIT_VBAT_OVP_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: VBAT OVP", __func__);
else if (val[HL7132_REG_STATUS_A] & HL7132_BIT_PMID_QUAL_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: PMID_QUAL", __func__);
else if (val[HL7132_REG_STATUS_A] & HL7132_BIT_VOUT_OVP_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: VOUT OVP", __func__);
return -EINVAL;
}
if (val[HL7132_REG_INT] & HL7132_BIT_TS_TEMP_I) {
int ntc_adc, ntc_th_upper, ntc_th_lower; /* NTC protection */
u8 reg_data[2]; /* NTC threshold */
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_TS0_TH_0,
reg_data, sizeof(reg_data));
if (ret < 0)
return -EIO;
masked_reg = reg_data[1] & HL7132_BITS_TS0_TH_MSB;
ntc_th_upper = (masked_reg << 8) | reg_data[0]; /* uV unit */
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_TS1_TH_0,
reg_data, sizeof(reg_data));
if (ret < 0)
return -EIO;
masked_reg = reg_data[1] & HL7132_BITS_TS1_TH_1_MSB;
ntc_th_lower = (masked_reg << 8) | reg_data[0]; /* uV unit */
/* Read NTC ADC */
ntc_adc = hl7132_read_adc(hl7132, ADCCH_VTS); /* uV unit */
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: NTC Protection, NTC_TH_UPPER=%d(uV), NTC_TH_LOWER=%d(uV) NTC_ADC=%d(uV)",
__func__, ntc_th_upper, ntc_th_lower, ntc_adc);
return -EINVAL;
}
if (val[HL7132_REG_INT_STS_B] & HL7132_BIT_CUR_STS) {
if (val[HL7132_REG_STATUS_B] & HL7132_BIT_IIN_OCP_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: IIN is over OCP", __func__);
else if (val[HL7132_REG_STATUS_B] & HL7132_BIT_IBAT_OCP_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: IBAT is over OCP", __func__);
else if (val[HL7132_REG_STATUS_B] & HL7132_BIT_IIN_UCP_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR, "%s: IIN is under UCP", __func__);
return -EINVAL;
}
if (val[HL7132_REG_INT_STS_B] & HL7132_BIT_SHORT_STS) {
if (val[HL7132_REG_STATUS_B] & HL7132_BIT_FET_SHORT_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: FET short is detected", __func__);
else if (val[HL7132_REG_STATUS_B] & HL7132_BIT_CFLY_SHORT_STS)
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: CFLY short is detected", __func__);
return -EINVAL;
}
if (val[HL7132_REG_INT_STS_B] & HL7132_BIT_WDOG_STS) {
/* Watchdog timer is expired */
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: Watchdog timer is expired", __func__);
return -EINVAL;
}
if (val[HL7132_REG_STATUS_B] & HL7132_BIT_THSD_STS) {
/* Over temperature protection */
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: Device is in thermal shutdown", __func__);
return -EINVAL;
}
return 0;
}
/* Keep the current charging state, check INT_STS_B again */
/* return 0 if VIN is still present, -EAGAIN if needs to retry, -EINVAL oth */
static int hl7132_check_standby(struct hl7132_charger *hl7132)
{
unsigned int reg_val, masked_reg;
int ret, chg_state;
u8 val[8];
bool is_active;
/* Re-read the state register */
ret = regmap_read(hl7132->regmap, HL7132_REG_INT_STS_B, &reg_val);
if (ret < 0)
return -EIO;
dev_dbg(hl7132->dev, "%s: RCP check, INT_STS_B=%#x\n", __func__,
reg_val);
/* Re-read and dump state */
hl7132_check_state(val, hl7132, LOGLEVEL_INFO);
masked_reg = val[HL7132_REG_INT_STS_A] & HL7132_BIT_STATE_CHG_STS;
chg_state = masked_reg >> MASK2SHIFT(HL7132_BIT_STATE_CHG_STS);
/* RCP condition, but VIN is valid and the HL7132 is active */
/* V_NOT_OK_STS should be low for valid VIN */
if ((reg_val & HL7132_BIT_V_NOT_OK_STS) && chg_state == STATE_CHG_STS_ACTIVE) {
const int charging_state = hl7132->charging_state;
/*
* Try again when called from hl7132_check_active_state().
* If VIN is increased, input current will increase over
* IIN_LOW level.
*/
is_active = charging_state == DC_STATE_CHECK_ACTIVE;
logbuffer_prlog(hl7132,
is_active ? LOGLEVEL_WARNING : LOGLEVEL_ERR,
"%s: RCP triggered but VIN is valid, state=%d",
__func__, charging_state);
hl7132->chg_data.rcp_count++;
return -EAGAIN;
}
/* Not in RCP state, retry only when DC is starting */
if (chg_state == STATE_CHG_STS_STANDBY) {
logbuffer_prlog(hl7132, LOGLEVEL_WARNING, "%s: device in standby", __func__);
hl7132->chg_data.stby_count++;
ret = -EAGAIN;
} else { /* chg_state == STATE_CHG_STS_SHUTDOWN - active checked above */
logbuffer_prlog(hl7132, LOGLEVEL_WARNING, "%s: device in shutdown", __func__);
ret = -EINVAL;
}
return ret;
}
/*
* HW integration guide section 5.4.4.a check status of charging
*
* 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
* hl7132_check_active_state().
*
* Other contexts:
* . hl7132_charge_adjust_ccmode
* . hl7132_charge_ccmode
* . hl7132_charge_start_cvmode
* . hl7132_charge_cvmode
* . hl7132_adjust_ta_voltage
* . hl7132_adjust_ta_current
* call holding mutex_lock(&hl7132->lock)
*/
static int hl7132_check_error(struct hl7132_charger *hl7132)
{
unsigned int reg_val, masked_reg;
int ret, chg_state;
int vbatt;
ret = regmap_read(hl7132->regmap, HL7132_REG_INT_STS_A, &reg_val);
if (ret < 0) {
dev_err(hl7132->dev,
"%s: Failed to read INT_STS_A, ret=%d\n", __func__, ret);
goto error;
}
chg_state = reg_val >> 6;
if (chg_state == STATE_CHG_STS_ACTIVE) {
/* HL7132 is charging */
/* Check whether the battery voltage is over the minimum */
vbatt = hl7132_read_adc(hl7132, ADCCH_VBAT);
if (vbatt > HL7132_DC_VBAT_MIN) {
/* Normal charging battery level */
/* Check temperature regulation loop */
masked_reg = reg_val & HL7132_BIT_REG_STS;
if ((masked_reg >> MASK2SHIFT(HL7132_BIT_REG_STS)) == REG_STS_TEMP) {
/* Over temperature protection */
dev_err(hl7132->dev,
"%s: Device is in temperature regulation\n",
__func__);
ret = -EINVAL;
}
} else {
/* Abnormal battery level */
dev_err(hl7132->dev,
"%s: Error abnormal battery voltage=%d\n",
__func__, vbatt);
ret = -EINVAL;
}
dev_dbg(hl7132->dev, "%s: Active Status ok=%d (ret=%d)\n",
__func__, ret == 0, ret);
return ret;
}
/* not in error but in standby or shutdown */
ret = hl7132_check_not_active(hl7132);
if (ret < 0) {
/* There was an error, done... */
} else if (chg_state == STATE_CHG_STS_SHUTDOWN) {
/* HL7132 is in shutdown state */
dev_err(hl7132->dev, "%s: HL7132 is in shutdown\n", __func__);
ret = -EINVAL;
} else if (hl7132->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. HL7132 should
* stop checking RCP condition and exit timer_work
*/
dev_err(hl7132->dev, "%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 = hl7132_check_standby(hl7132);
}
error:
dev_dbg(hl7132->dev, "%s: Not Active Status=%d\n", __func__, ret);
return ret;
}
static int hl7132_get_iin(struct hl7132_charger *hl7132, int *iin)
{
const int offset = 0;
int temp;
temp = hl7132_read_adc(hl7132, ADCCH_IIN);
if (temp < 0)
return temp;
if (temp < offset)
temp = offset;
*iin = (temp - offset) * 2; /* 2:1 */
return 0;
}
static int hl7132_get_batt_info(struct hl7132_charger *hl7132, int info_type, int *info)
{
union power_supply_propval val;
enum power_supply_property psp;
int ret;
if (!hl7132->batt_psy)
hl7132->batt_psy = power_supply_get_by_name("battery");
if (!hl7132->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(hl7132->batt_psy, psp, &val);
if (ret == 0)
*info = val.intval;
return ret;
}
static int hl7132_get_ibatt(struct hl7132_charger *hl7132, int *info)
{
return hl7132_get_batt_info(hl7132, BATT_CURRENT, info);
}
static void hl7132_prlog_state(struct hl7132_charger *hl7132, const char *fn)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
rc = hl7132_get_ibatt(hl7132, &ibat);
if (rc == 0)
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
ovc_flag = ibat > hl7132->cc_max;
if (ovc_flag)
hl7132_chg_stats_inc_ovcf(&hl7132->chg_data, ibat, hl7132->cc_max);
logbuffer_prlog(hl7132, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=%d, icn=%d ibat=%d, cc_max=%d rc=%d",
fn, iin, hl7132->iin_cc, icn, ibat, hl7132->cc_max, rc);
}
static int hl7132_read_status(struct hl7132_charger *hl7132)
{
unsigned int reg_val;
int ret;
ret = regmap_read(hl7132->regmap, HL7132_REG_STATUS_A, &reg_val);
if (ret < 0)
return ret;
if (reg_val & HL7132_BIT_VIN_UVLO_STS)
return STS_MODE_VIN_UVLO;
ret = regmap_read(hl7132->regmap, HL7132_REG_INT_STS_A, &reg_val);
if (ret < 0)
return ret;
reg_val = (reg_val & HL7132_BIT_REG_STS) >> MASK2SHIFT(HL7132_BIT_REG_STS);
switch (reg_val) {
case REG_STS_NONE:
return STS_MODE_LOOP_INACTIVE; /* No regulation loop active */
case REG_STS_VBAT:
return STS_MODE_VFLT_LOOP; /* Battery voltage regulation */
case REG_STS_IIN:
return STS_MODE_IIN_LOOP; /* Input current regulation */
case REG_STS_IBAT:
return STS_MODE_IBAT_LOOP; /* Battery current regulation (if applicable) */
case REG_STS_TEMP:
return STS_MODE_TEMP_REG; /* Temperature regulation */
default:
return STS_MODE_UNKNOWN; /* Unknown or reserved state */
}
}
static int hl7132_const_charge_voltage(struct hl7132_charger *hl7132);
static int hl7132_check_status(struct hl7132_charger *hl7132)
{
int icn = -EINVAL, ibat = -EINVAL, vbat = -EINVAL;
int rc, status;
status = hl7132_read_status(hl7132);
if (status < 0)
goto error;
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
rc = hl7132_get_batt_info(hl7132, BATT_CURRENT, &ibat);
if (rc == 0)
rc = hl7132_get_batt_info(hl7132, BATT_VOLTAGE, &vbat);
error:
dev_dbg(hl7132->dev,
"%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,
hl7132->fv_uv, hl7132->cc_max);
return status;
}
/* hold mutex_lock(&hl7132->lock); */
static int hl7132_recover_ta(struct hl7132_charger *hl7132)
{
int ret;
dev_dbg(hl7132->dev, "%s: recovering TA\n", __func__);
if (hl7132->ftm_mode)
return 0;
/* TODO: recover TA to value before handoff, or use DT */
hl7132->ta_vol = 9000000;
hl7132->ta_cur = 2200000;
hl7132->ta_objpos = 1; /* PDO1 - fixed 5V */
ret = hl7132_send_pd_message(hl7132, MSG_REQUEST_FIXED_PDO);
/* will not be able to recover if TA is offline */
if (ret < 0)
dev_dbg(hl7132->dev, "%s: cannot recover TA (%d)\n", __func__,
ret);
return 0;
}
/* Stop Charging */
static int hl7132_stop_charging(struct hl7132_charger *hl7132)
{
int ret = 0;
/* mark the end with \n in logbuffer */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: hl7132->charging_state=%d ret=%d\n",
__func__, hl7132->charging_state, ret);
mutex_lock(&hl7132->lock);
/* Check the current state */
if (hl7132->charging_state == DC_STATE_NO_CHARGING)
goto done;
/* Stop Direct charging */
cancel_delayed_work(&hl7132->timer_work);
cancel_delayed_work(&hl7132->pps_work);
hl7132->timer_id = TIMER_ID_NONE;
hl7132->timer_period = 0;
/* Clear parameter */
if (hl7132->charging_state != DC_STATE_ERROR)
hl7132->charging_state = DC_STATE_NO_CHARGING;
hl7132->ret_state = DC_STATE_NO_CHARGING;
hl7132->prev_iin = 0;
hl7132->prev_inc = INC_NONE;
hl7132->chg_mode = CHG_NO_DC_MODE;
/* restore to config */
hl7132->pdata->iin_cfg = hl7132->pdata->iin_cfg_max;
hl7132->pdata->vbat_reg = hl7132->pdata->vbat_reg_dt;
/*
* Clear charging configuration
* TODO: use defaults when these are negative or zero at startup
* NOTE: cc_max is twice of IIN + headroom
*/
hl7132->cc_max = -1;
hl7132->fv_uv = -1;
/* Clear requests for new vbat_reg and new IIN */
hl7132->new_vfloat = 0;
hl7132->new_iin = 0;
/* used to start DC and during errors */
hl7132->retry_cnt = 0;
hl7132->prev_ta_cur = 0;
hl7132->prev_ta_vol = 0;
/* close stats */
hl7132_chg_stats_done(&hl7132->chg_data, hl7132);
hl7132_chg_stats_dump(hl7132);
/* TODO: something here to prep TA for the switch */
/* HW integration guide section 5.5 - Disable charging */
ret = hl7132_set_charging(hl7132, false);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Error-set_charging(main)\n", __func__);
goto error;
}
/* stop charging and recover TA voltage */
if (hl7132->mains_online == true)
hl7132_recover_ta(hl7132);
power_supply_changed(hl7132->mains);
/* HW integration guide sections 4.1, 5.5 - Soft reset and reinitialize */
hl7132->hw_init_done = false;
if (hl7132_hw_init(hl7132) == 0)
hl7132->hw_init_done = true;
done:
error:
mutex_unlock(&hl7132->lock);
__pm_relax(hl7132->monitor_wake_lock);
dev_dbg(hl7132->dev, "%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
* hl7132_charge_ccmode() when loop becomes not active.
*
* hl7132_charge_ccmode() ->
* -> hl7132_set_ta_voltage_comp()
* -> hl7132_set_ta_current_comp2()
*
* NOTE: call holding mutex_lock(&hl7132->lock);
*/
static int hl7132_set_ta_current_comp(struct hl7132_charger *hl7132)
{
const int iin_high = hl7132->iin_cc + hl7132->pdata->iin_cc_comp_offset;
const int iin_low = hl7132->iin_cc - hl7132->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = hl7132_get_ibatt(hl7132, &ibat);
if (rc == 0)
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
ovc_flag = ibat > hl7132->cc_max;
if (ovc_flag)
hl7132_chg_stats_inc_ovcf(&hl7132->chg_data, ibat, hl7132->cc_max);
logbuffer_prlog(hl7132, 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 ta_cur=%d, ta_vol=%d",
__func__, iin, iin_low, hl7132->iin_cc, iin_high,
icn, ibat, hl7132->cc_max, rc,
hl7132->prev_iin, hl7132->ta_cur, hl7132->ta_vol);
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 (hl7132->ta_cur > hl7132->iin_cc) {
/* TA current is over than IIN_CC */
/* Decrease TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont1: ta_cur=%u",
hl7132->ta_cur);
/* TA current is already less than IIN_CC */
/* Compara IIN_ADC with the previous IIN_ADC */
} else if (iin < (hl7132->prev_iin - HL7132_IIN_ADC_OFFSET)) {
/* Assume that TA operation mode is CV mode */
/* Decrease TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont2-1: ta_vol=%u",
hl7132->ta_vol);
} else {
/* Assume TA operation mode is CL mode */
/* Decrease TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont2-2: ta_cur=%u",
hl7132->ta_cur);
}
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
} else if (iin < iin_low) {
/* compare IIN ADC with previous IIN ADC + 20mA */
if (iin > (hl7132->prev_iin + HL7132_IIN_ADC_OFFSET)) {
/*
* TA voltage is not enough to supply the operating
* current of RDO: increase TA voltage
*/
/* Compare TA max voltage */
if (hl7132->ta_vol == hl7132->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA max current */
if (!hl7132_can_inc_ta_cur(hl7132)) {
/* TA voltage and current are at max */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End1: ta_vol=%u, ta_cur=%u",
hl7132->ta_vol, hl7132->ta_cur);
/* Set timer */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Cont3: ta_cur=%u",
hl7132->ta_cur);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Cont4: ta_vol=%u", hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_VOL;
}
/* TA current is lower than the target input current */
/* Check the previous TA increment */
} else if (hl7132->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 (!hl7132_can_inc_ta_cur(hl7132)) {
/* TA current is already the maximum current */
/* Compare TA max voltage */
if (hl7132->ta_vol == hl7132->ta_max_vol) {
/*
* TA voltage and current are already
* the maximum values
*/
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End2: ta_vol=%u, ta_cur=%u",
hl7132->ta_vol, hl7132->ta_cur);
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK1_T;
} else {
/* Increase TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Cont5: ta_vol=%u",
hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_VOL;
}
} else {
const unsigned int ta_cur = hl7132->ta_cur +
PD_MSG_TA_CUR_STEP;
/* Increase TA current (50mA) */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Cont6: ta_cur=%u->%u",
hl7132->ta_cur, ta_cur);
hl7132->ta_cur = hl7132->ta_cur + PD_MSG_TA_CUR_STEP;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
hl7132->prev_inc = INC_TA_CUR;
}
/*
* The previous increment was TA current, but input current
* did not increase. Try to increase TA voltage.
*/
} else if (hl7132->ta_vol == hl7132->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA maximum current */
if (!hl7132_can_inc_ta_cur(hl7132)) {
/*
* TA voltage and current are already at the
* maximum values
*/
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End3: ta_vol=%u, ta_cur=%u",
hl7132->ta_vol, hl7132->ta_cur);
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Cont7: ta_cur=%u", hl7132->ta_cur);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Comp. Cont8: ta_vol=%u->%u",
hl7132->ta_vol, hl7132->ta_vol + PD_MSG_TA_VOL_STEP);
hl7132->ta_vol += PD_MSG_TA_VOL_STEP;
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_VOL;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Comp. End4(valid): ta_vol=%u, ta_cur=%u",
hl7132->ta_vol, hl7132->ta_cur);
/* Set timer */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK1_T;
/* b/186969924: reset increment state on valid */
hl7132->prev_inc = INC_NONE;
}
/* Save previous iin adc */
hl7132->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 hl7132_get_iin_max(const struct hl7132_charger *hl7132, int cc_max)
{
const int cc_limit = hl7132->pdata->iin_max_offset + cc_max / 2;
int iin_max;
iin_max = min_t(unsigned int, hl7132->pdata->iin_cfg_max, cc_limit);
dev_dbg(hl7132->dev,
"%s: iin_max=%d iin_cfg=%u iin_cfg_max=%d cc_max=%d cc_limit=%d\n",
__func__, iin_max, hl7132->pdata->iin_cfg,
hl7132->pdata->iin_cfg_max, cc_max, cc_limit);
return iin_max;
}
/* Compensate TA current for constant power mode */
/* hold mutex_lock(&hl7132->lock), schedule on return 0 */
static int hl7132_set_ta_current_comp2(struct hl7132_charger *hl7132)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = hl7132_get_ibatt(hl7132, &ibat);
if (rc == 0)
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
ovc_flag = ibat > hl7132->cc_max;
if (ovc_flag)
hl7132_chg_stats_inc_ovcf(&hl7132->chg_data, ibat, hl7132->cc_max);
logbuffer_prlog(hl7132, 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,
hl7132->iin_cc - HL7132_IIN_CC_COMP_OFFSET_CP,
hl7132->iin_cc,
hl7132->iin_cc + HL7132_IIN_CC_COMP_OFFSET_CP,
hl7132->pdata->iin_cfg,
icn, ibat, hl7132->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (hl7132->pdata->iin_cfg + hl7132->pdata->iin_cc_comp_offset)) {
/* TA current is higher than the target input current limit */
hl7132->ta_cur = hl7132->ta_cur - PD_MSG_TA_CUR_STEP;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
} else if (iin < (hl7132->iin_cc - HL7132_IIN_CC_COMP_OFFSET_CP)) {
/* TA current is lower than the target input current */
/* IIN_ADC < IIN_CC -20mA */
if (hl7132->ta_vol == hl7132->ta_max_vol) {
const int iin_cc_lb = hl7132->iin_cc -
hl7132->pdata->iin_cc_comp_offset;
/* Check IIN_ADC < IIN_CC - 50mA */
if (iin < iin_cc_lb) {
const unsigned int ta_max_vol =
hl7132->pdata->ta_max_vol * hl7132->chg_mode;
unsigned int iin_apdo;
unsigned int val;
/* Set new IIN_CC to IIN_CC - 50mA */
hl7132->iin_cc = hl7132->iin_cc -
hl7132->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 = hl7132->iin_cc / PD_MSG_TA_CUR_STEP;
iin_apdo = iin_apdo * PD_MSG_TA_CUR_STEP;
/* in mV */
val = hl7132->ta_max_pwr / (iin_apdo / hl7132->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 */
hl7132->ta_max_vol = min(val, ta_max_vol);
/* Increase TA voltage(40mV) */
hl7132->ta_vol = hl7132->ta_vol + PD_MSG_TA_VOL_STEP * 2;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Cont1: ta_vol=%u",
hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
} else {
/* Wait for next current step compensation */
/* IIN_CC - 50mA < IIN ADC < IIN_CC - 20mA */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Comp.(wait): ta_vol=%u",
hl7132->ta_vol);
/* Set timer */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK2_T;
}
} else {
/* Increase TA voltage(40mV) */
hl7132->ta_vol = hl7132->ta_vol + PD_MSG_TA_VOL_STEP * 2;
if (hl7132->ta_vol > hl7132->ta_max_vol)
hl7132->ta_vol = hl7132->ta_max_vol;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CFG + 50mA */
dev_dbg(hl7132->dev, "End(valid): ta_vol=%u\n", hl7132->ta_vol);
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK2_T;
/* b/186969924: reset increment state on valid */
hl7132->prev_inc = INC_NONE;
}
/* Save previous iin adc */
hl7132->prev_iin = iin;
return 0;
}
/* Compensate TA voltage for the target input current */
/* hold mutex_lock(&hl7132->lock), schedule on return 0 */
static int hl7132_set_ta_voltage_comp(struct hl7132_charger *hl7132)
{
const int iin_high = hl7132->iin_cc + hl7132->pdata->iin_cc_comp_offset;
const int iin_low = hl7132->iin_cc - hl7132->pdata->iin_cc_comp_offset;
const int ibat_limit = (hl7132->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
dev_dbg(hl7132->dev, "%s: = charging_state=%u ==\n", __func__,
hl7132->charging_state);
/* IIN = IBAT+SYSLOAD */
rc = hl7132_get_ibatt(hl7132, &ibat);
if (rc == 0)
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
ovc_flag = ibat > hl7132->cc_max;
if (ovc_flag)
hl7132_chg_stats_inc_ovcf(&hl7132->chg_data, ibat, hl7132->cc_max);
logbuffer_prlog(hl7132, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d ta_cur=%d, ta_vol=%d",
__func__, iin, iin_low, hl7132->iin_cc, iin_high,
icn, ibat, hl7132->cc_max, rc, hl7132->ta_cur, hl7132->ta_vol);
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) */
hl7132->ta_vol = hl7132->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
} else if (iin < hl7132->iin_cc - hl7132->pdata->iin_cc_comp_offset) {
/* TA current is lower than the target input current */
/* Compare TA max voltage */
if (hl7132->ta_vol == hl7132->ta_max_vol) {
/* TA is already at maximum voltage */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "End1(max TA vol): ta_vol=%u",
hl7132->ta_vol);
/* Set timer */
/* Check the current charging state */
if (hl7132->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK1_T;
} else {
/* CV mode */
hl7132->timer_id = TIMER_CHECK_CVMODE;
hl7132->timer_period = HL7132_CVMODE_CHECK_T;
}
} else {
const unsigned int ta_vol = hl7132->ta_vol;
/* Increase TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont2: ta_vol:%u->%u",
ta_vol, hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End(valid): ta_vol=%u low_ibat=%d\n",
hl7132->ta_vol, ibat < ibat_limit);
/* Check the current charging state */
if (hl7132->charging_state == DC_STATE_CC_MODE) {
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = HL7132_CCMODE_CHECK1_T;
} else {
hl7132->timer_id = TIMER_CHECK_CVMODE;
hl7132->timer_period = HL7132_CVMODE_CHECK_T;
}
}
return 0;
}
/*
* iin limit for 2:1 for the adapter and chg_mode
* Minimum between the configuration, cc_max (scaled with offset) and the
* adapter capabilities.
*/
static int hl7132_get_iin_limit(const struct hl7132_charger *hl7132)
{
int iin_cc;
iin_cc = hl7132_get_iin_max(hl7132, hl7132->cc_max);
if (hl7132->ta_max_cur * hl7132->chg_mode < iin_cc)
iin_cc = hl7132->ta_max_cur * hl7132->chg_mode;
dev_dbg(hl7132->dev, "%s: iin_cc=%d ta_max_cur=%u, chg_mode=%d\n",
__func__, iin_cc, hl7132->ta_max_cur, hl7132->chg_mode);
return iin_cc;
}
/* recalculate ->ta_vol and ->ta_cur looking at demand (cc_max) */
static int hl7132_set_wired_dc(struct hl7132_charger *hl7132, int vbat)
{
const unsigned long ta_max_vol = hl7132->pdata->ta_max_vol * hl7132->chg_mode;
unsigned long val;
int iin_cc;
hl7132->iin_cc = hl7132_get_iin_limit(hl7132);
/* Calculate new TA max voltage, current */
val = hl7132->iin_cc / PD_MSG_TA_CUR_STEP;
iin_cc = val * PD_MSG_TA_CUR_STEP;
val = hl7132->ta_max_pwr / (iin_cc / hl7132->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 */
hl7132->ta_max_vol = min(val, ta_max_vol);
/* HW integration guide section 5.4.1 - request TA voltage
* MAX[8000mV * chg_mode, 2 * VBAT_ADC * chg_mode + 500 mV]
*/
hl7132->ta_vol = max(HL7132_TA_MIN_VOL_PRESET * hl7132->chg_mode,
2 * vbat * hl7132->chg_mode + hl7132->pdata->ta_vol_offset);
/* PPS voltage resolution is 20mV */
val = hl7132->ta_vol / PD_MSG_TA_VOL_STEP;
hl7132->ta_vol = val * PD_MSG_TA_VOL_STEP;
hl7132->ta_vol = min(hl7132->ta_vol, hl7132->ta_max_vol);
/* Set TA current to IIN_CC */
hl7132->ta_cur = iin_cc / hl7132->chg_mode;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_cur=%d ta_max_vol=%d",
__func__, hl7132->iin_cc, hl7132->ta_vol, hl7132->ta_cur,
hl7132->ta_max_vol);
return 0;
}
/*
* like hl7132_preset_dcmode() but will not query the TA.
* Called from timer:
* [hl7132_charge_ccmode | hl7132_charge_cvmode] ->
* hl7132_apply_new_iin() ->
* hl7132_adjust_ta_current() ->
* hl7132_reset_dcmode()
* hl7132_apply_new_vfloat() ->
* hl7132_reset_dcmode()
*
* NOTE: caller holds mutex_lock(&hl7132->lock);
*/
static int hl7132_reset_dcmode(struct hl7132_charger *hl7132)
{
int ret = -EINVAL, vbat;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
dev_dbg(hl7132->dev, "%s: = charging_state=%u ==\n", __func__,
hl7132->charging_state);
if (hl7132->cc_max < 0) {
dev_err(hl7132->dev, "%s: invalid cc_max=%d\n", __func__,
hl7132->cc_max);
goto error;
}
/*
* VBAT is over threshold but it might be "bouncy" due to transitory
* used to determine ta_vout.
*/
vbat = hl7132_read_adc(hl7132, ADCCH_VBAT);
if (vbat < 0)
return vbat;
ret = hl7132_set_wired_dc(hl7132, vbat);
/* Clear previous IIN ADC, TA increment flag */
hl7132->prev_inc = INC_NONE;
hl7132->prev_iin = 0;
error:
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* The caller was triggered from hl7132_apply_new_iin(), return to the
* calling CC or CV loop.
* call holding mutex_unlock(&hl7132->lock);
*/
static void hl7132_return_to_loop(struct hl7132_charger *hl7132)
{
switch (hl7132->ret_state) {
case DC_STATE_CC_MODE:
hl7132->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_CV_MODE:
hl7132->timer_id = TIMER_CHECK_CVMODE;
break;
default:
dev_err(hl7132->dev, "%s: invalid ret_state=%u\n",
__func__, hl7132->ret_state);
return;
}
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, hl7132->ret_state);
hl7132->charging_state = hl7132->ret_state;
hl7132->timer_period = 1000;
hl7132->ret_state = 0;
hl7132->new_iin = 0;
}
/*
* Kicked from hl7132_apply_new_iin() when hl7132->new_iin!=0 and completed
* off the timer.
* NOTE: Will return to the calling loop in ->ret_state
*/
static int hl7132_adjust_ta_current(struct hl7132_charger *hl7132)
{
const int ta_limit = hl7132->iin_cc / hl7132->chg_mode;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
int ret = 0;
rc = hl7132_check_error(hl7132);
if (rc != 0)
return rc;
rc = hl7132_get_ibatt(hl7132, &ibat);
if (rc == 0)
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
ovc_flag = ibat > hl7132->cc_max;
if (ovc_flag)
hl7132_chg_stats_inc_ovcf(&hl7132->chg_data, ibat, hl7132->cc_max);
logbuffer_prlog(hl7132, 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, hl7132->iin_cc, ta_limit, hl7132->pdata->iin_cfg,
icn, ibat, hl7132->cc_max, rc);
if (hl7132->charging_state != DC_STATE_ADJUST_TACUR)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_ADJUST_TACUR);
hl7132->charging_state = DC_STATE_ADJUST_TACUR;
if (hl7132->ta_cur == ta_limit) {
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"adj. End, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
hl7132->ta_cur, hl7132->ta_vol,
hl7132->iin_cc, hl7132->chg_mode);
/* "Recover" IIN_CC to the original value (new_iin) */
hl7132->iin_cc = hl7132->new_iin;
hl7132_return_to_loop(hl7132);
} else if (hl7132->iin_cc > hl7132->pdata->iin_cfg) {
const int old_iin_cfg = hl7132->pdata->iin_cfg;
/* Raise iin_cfg to the new iin_cc value (why????) */
hl7132->pdata->iin_cfg = hl7132->iin_cc;
ret = hl7132_set_input_current(hl7132, hl7132->iin_cc);
if (ret == 0)
ret = hl7132_reset_dcmode(hl7132);
if (ret < 0)
goto error;
logbuffer_prlog(hl7132, 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",
hl7132->ta_max_vol, hl7132->ta_max_cur,
hl7132->ta_max_pwr, hl7132->iin_cc,
old_iin_cfg, hl7132->iin_cc,
hl7132->chg_mode);
hl7132->new_iin = 0;
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_ADJUST_CC);
/* Send PD Message and go to Adjust CC mode */
hl7132->charging_state = DC_STATE_ADJUST_CC;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
} else {
unsigned int val;
/*
* Adjust IIN_CC with APDO resolution(50mA)
* hl7132->iin_cc will be reset to hl7132->new_iin when
* ->ta_cur reaches the ta_limit at the beginning of the
* function
*/
val = hl7132->iin_cc / PD_MSG_TA_CUR_STEP;
hl7132->iin_cc = val * PD_MSG_TA_CUR_STEP;
hl7132->ta_cur = hl7132->iin_cc / hl7132->chg_mode;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "adjust iin=%u ta_cur=%d chg_mode=%d",
hl7132->iin_cc, hl7132->ta_cur, hl7132->chg_mode);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
}
/* reschedule on ret == 0 */
error:
return ret;
}
/* Kicked from apply_new_iin() then run off the timer
* call holding mutex_lock(&hl7132->lock);
*/
static int hl7132_adjust_ta_voltage(struct hl7132_charger *hl7132)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (hl7132->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_ADJUST_TAVOL);
hl7132->charging_state = DC_STATE_ADJUST_TAVOL;
rc = hl7132_check_error(hl7132);
if (rc != 0)
return rc;
rc = hl7132_get_ibatt(hl7132, &ibat);
if (rc == 0)
rc = hl7132_get_iin(hl7132, &icn);
if (rc == 0)
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
ovc_flag = ibat > hl7132->cc_max;
if (ovc_flag)
hl7132_chg_stats_inc_ovcf(&hl7132->chg_data, ibat, hl7132->cc_max);
logbuffer_prlog(hl7132, 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, hl7132->iin_cc - PD_MSG_TA_CUR_STEP,
hl7132->iin_cc, hl7132->iin_cc + PD_MSG_TA_CUR_STEP,
icn, ibat, hl7132->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with targer input current */
if (iin > (hl7132->iin_cc + PD_MSG_TA_CUR_STEP)) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont1, ta_vol=%u",
hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
} else if (iin < (hl7132->iin_cc - PD_MSG_TA_CUR_STEP)) {
/* TA current is lower than the target input current */
if (hl7132_check_status(hl7132) == STS_MODE_VFLT_LOOP) {
/* IIN current may not able to increase in CV */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
hl7132->ta_cur, hl7132->ta_vol,
hl7132->iin_cc, hl7132->chg_mode);
hl7132_return_to_loop(hl7132);
} else if (hl7132->ta_vol == hl7132->ta_max_vol) {
/* TA TA voltage is already at the maximum voltage */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End1, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
hl7132->ta_cur, hl7132->ta_vol,
hl7132->iin_cc, hl7132->chg_mode);
hl7132_return_to_loop(hl7132);
} else {
/* Increase TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont2, ta_vol=%u",
hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End2, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
hl7132->ta_cur, hl7132->ta_vol,
hl7132->iin_cc, hl7132->chg_mode);
hl7132_return_to_loop(hl7132);
}
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(&hl7132->lock)
*/
static int hl7132_apply_new_iin(struct hl7132_charger *hl7132)
{
int ret;
logbuffer_prlog(hl7132, LOGLEVEL_INFO,
"new_iin=%d (cc_max=%d), ta_type=%d charging_state=%d",
hl7132->new_iin, hl7132->cc_max,
hl7132->ta_type, hl7132->charging_state);
/* iin_cfg is adjusted UP in hl7132_set_input_current() */
ret = hl7132_set_input_current(hl7132, hl7132->new_iin);
if (ret < 0)
return ret;
hl7132->pdata->iin_cfg = hl7132->new_iin;
/*
* ->ret_state is used to go back to the loop (CC or CV) that called
* this function.
*/
hl7132->ret_state = hl7132->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.
*/
hl7132->iin_cc = hl7132->new_iin;
if (hl7132->iin_cc < (HL7132_TA_MIN_CUR * hl7132->chg_mode)) {
/* TA current = HL7132_TA_MIN_CUR(1.0A) */
hl7132->ta_cur = HL7132_TA_MIN_CUR;
ret = hl7132_adjust_ta_voltage(hl7132);
} else {
ret = hl7132_adjust_ta_current(hl7132);
}
/* need reschedule on ret != 0 */
dev_dbg(hl7132->dev, "%s: ret=%d\n", __func__, ret);
return ret;
}
/*
* also called from hl7132_set_new_cc_max()
* call holding mutex_unlock(&hl7132->lock);
*/
static int hl7132_set_new_iin(struct hl7132_charger *hl7132, int iin)
{
int ret = 0;
if (iin < 0) {
dev_dbg(hl7132->dev, "%s: ignore negative iin=%d\n", __func__,
iin);
return 0;
}
/* same as previous request nevermind */
if (iin == hl7132->new_iin)
return 0;
dev_dbg(hl7132->dev, "%s: new_iin=%d->%d state=%d\n", __func__,
hl7132->new_iin, iin, hl7132->charging_state);
/* apply iin_cc in hl7132_preset_config() at start */
if (hl7132->charging_state == DC_STATE_NO_CHARGING ||
hl7132->charging_state == DC_STATE_CHECK_VBAT) {
/* used on start vs the ->iin_cfg one */
hl7132->pdata->iin_cfg = iin;
hl7132->iin_cc = iin;
} else if (hl7132->ret_state == 0) {
/*
* hl7132_apply_new_iin() has not picked out the value yet
* and the value can be changed safely.
*/
hl7132->new_iin = iin;
/* might want to tickle the loop now */
} else {
/* the caller must retry */
ret = -EAGAIN;
}
dev_dbg(hl7132->dev, "%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 hl7132_set_new_cc_max(struct hl7132_charger *hl7132, int cc_max)
{
const int prev_cc_max = hl7132->cc_max;
int iin_max, ret = 0;
if (cc_max < 0) {
dev_dbg(hl7132->dev, "%s: ignore negative cc_max=%d\n", __func__,
cc_max);
return 0;
}
mutex_lock(&hl7132->lock);
/* same as previous request nevermind */
if (cc_max == hl7132->cc_max)
goto done;
/* iin will be capped by the adapter capabilities in reset_dcmode() */
iin_max = hl7132_get_iin_max(hl7132, cc_max);
if (iin_max <= 0) {
dev_dbg(hl7132->dev, "%s: ignore negative iin_max=%d\n",
__func__, iin_max);
goto done;
}
if (hl7132->ta_max_cur && hl7132->ta_max_cur < iin_max)
iin_max = hl7132->ta_max_cur;
ret = hl7132_set_new_iin(hl7132, iin_max);
if (ret == 0)
hl7132->cc_max = cc_max;
logbuffer_prlog(hl7132, LOGLEVEL_INFO,
"%s: charging_state=%d cc_max=%d->%d iin_max=%d, ret=%d",
__func__, hl7132->charging_state, prev_cc_max,
cc_max, iin_max, ret);
done:
dev_dbg(hl7132->dev, "%s: ret=%d\n", __func__, ret);
mutex_unlock(&hl7132->lock);
return ret;
}
/*
* Apply hl7132->new_vfloat to the charging voltage.
* Called from CC and CV loops, needs mutex_lock(&hl7132->lock)
*/
static int hl7132_apply_new_vfloat(struct hl7132_charger *hl7132)
{
int ret = 0;
if (hl7132->fv_uv == hl7132->new_vfloat)
goto error_done;
/* actually change the hardware */
ret = hl7132_set_vbat_reg(hl7132, hl7132->new_vfloat);
if (ret < 0)
goto error_done;
/* Restart the process if tier switch happened (either direction) */
if (hl7132->charging_state == DC_STATE_CV_MODE &&
abs(hl7132->new_vfloat - hl7132->fv_uv) > HL7132_TIER_SWITCH_DELTA) {
ret = hl7132_reset_dcmode(hl7132);
if (ret < 0) {
dev_err(hl7132->dev, "%s: cannot reset dcmode (%d)\n",
__func__, ret);
} else {
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n",
__func__, hl7132->charging_state,
DC_STATE_ADJUST_CC);
hl7132->charging_state = DC_STATE_ADJUST_CC;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
}
}
hl7132->fv_uv = hl7132->new_vfloat;
error_done:
logbuffer_prlog(hl7132, LOGLEVEL_INFO,
"%s: new_vfloat=%d, ret=%d", __func__,
hl7132->new_vfloat, ret);
if (ret == 0)
hl7132->new_vfloat = 0;
return ret;
}
static int hl7132_set_new_vfloat(struct hl7132_charger *hl7132, int vfloat)
{
int ret = 0;
if (vfloat < 0) {
dev_dbg(hl7132->dev, "%s: ignore negative vfloat %d\n",
__func__, vfloat);
return 0;
}
mutex_lock(&hl7132->lock);
if (hl7132->new_vfloat == vfloat)
goto done;
/* use fv_uv at start in hl7132_preset_config() */
if (hl7132->charging_state == DC_STATE_NO_CHARGING ||
hl7132->charging_state == DC_STATE_CHECK_VBAT) {
hl7132->fv_uv = vfloat;
} else {
/* applied in hl7132_apply_new_vfloat() from CC or in CV loop */
hl7132->new_vfloat = vfloat;
dev_dbg(hl7132->dev, "%s: new_vfloat=%d\n", __func__,
hl7132->new_vfloat);
/* might want to tickle the cycle */
}
done:
mutex_unlock(&hl7132->lock);
return ret;
}
/* called on loop inactive */
static void hl7132_adjust_ccmode_wired(struct hl7132_charger *hl7132, int iin)
{
/* USBPD TA is connected */
if (iin > (hl7132->iin_cc - HL7132_IIN_ADC_OFFSET)) {
/* IIN_ADC > IIN_CC -20mA ? */
/* Input current is already over IIN_CC */
/* End TA voltage and current adjustment */
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
hl7132->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End1: IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, hl7132->ta_vol, hl7132->ta_cur);
/* Clear TA increment flag */
hl7132->prev_inc = INC_NONE;
/* Go to CC mode */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = 0;
/* Check TA voltage */
} else if (hl7132->ta_vol == hl7132->ta_max_vol) {
/* TA voltage is already max value */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End2: MAX value, ta_vol=%u, ta_cur=%u",
hl7132->ta_vol, hl7132->ta_cur);
/* Clear TA increment flag */
hl7132->prev_inc = INC_NONE;
/* Go to CC mode */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->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 < (hl7132->iin_cc - HL7132_TA_IIN_OFFSET)) {
/*
* TA voltage too low to enter TA CC mode, so we
* should increase TA voltage
*/
hl7132->ta_vol = hl7132->ta_vol + HL7132_TA_VOL_STEP_ADJ_CC *
hl7132->chg_mode;
if (hl7132->ta_vol > hl7132->ta_max_vol)
hl7132->ta_vol = hl7132->ta_max_vol;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
hl7132->ta_vol);
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_VOL;
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* compare IIN ADC with previous IIN ADC + 20mA */
} else if (iin > (hl7132->prev_iin + HL7132_IIN_ADC_OFFSET)) {
/* TA can supply more current if TA voltage is high */
/* TA voltage too low for TA CC mode: increase it */
hl7132->ta_vol = hl7132->ta_vol +
HL7132_TA_VOL_STEP_ADJ_CC *
hl7132->chg_mode;
if (hl7132->ta_vol > hl7132->ta_max_vol)
hl7132->ta_vol = hl7132->ta_max_vol;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
hl7132->ta_vol);
/* Set TA increment flag */
hl7132->prev_inc = INC_TA_VOL;
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
/* Check the previous increment */
} else if (hl7132->prev_inc == INC_TA_CUR) {
/*
* The previous increment is TA current, but input
* current does not increase. Try with voltage.
*/
hl7132->ta_vol = hl7132->ta_vol +
HL7132_TA_VOL_STEP_ADJ_CC *
hl7132->chg_mode;
if (hl7132->ta_vol > hl7132->ta_max_vol)
hl7132->ta_vol = hl7132->ta_max_vol;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont3: ta_vol=%u",
hl7132->ta_vol);
hl7132->prev_inc = INC_TA_VOL;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->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 (!hl7132_can_inc_ta_cur(hl7132)) {
/* TA current is maximum current */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"End(MAX_CUR): IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, hl7132->ta_vol, hl7132->ta_cur);
hl7132->prev_inc = INC_NONE;
/* Go to CC mode */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = 0;
} else {
/* TA has tolerance and compensate it as real current */
/* Increase TA current(50mA) */
hl7132->ta_cur = hl7132->ta_cur + PD_MSG_TA_CUR_STEP;
if (hl7132->ta_cur > hl7132->ta_max_cur)
hl7132->ta_cur = hl7132->ta_max_cur;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "Cont4: ta_cur=%u",
hl7132->ta_cur);
hl7132->prev_inc = INC_TA_CUR;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
}
}
static int hl7132_vote_dc_avail(struct hl7132_charger *hl7132, int vote, int enable)
{
int ret = 0;
if (!hl7132->dc_avail)
hl7132->dc_avail = gvotable_election_get_handle(VOTABLE_DC_CHG_AVAIL);
if (hl7132->dc_avail) {
ret = gvotable_cast_int_vote(hl7132->dc_avail, REASON_DC_DRV, vote, enable);
if (ret < 0)
dev_err(hl7132->dev,
"Unable to cast vote for DC Chg avail (%d)\n",
ret);
}
logbuffer_prlog(hl7132, hl7132->charging_state == DC_STATE_ERROR ?
LOGLEVEL_INFO : LOGLEVEL_DEBUG,
"%s: Voting dc_avail when in error state", __func__);
return ret;
}
/* 2:1 Direct Charging Adjust CC MODE control
* called at the beginnig of CC mode charging. Will be followed by
* hl7132_charge_ccmode with which shares some of the adjustments.
*/
static int hl7132_charge_adjust_ccmode(struct hl7132_charger *hl7132)
{
int iin, ccmode, vbatt, vin_vol;
int ret = 0;
mutex_lock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
hl7132_prlog_state(hl7132, __func__);
if (hl7132->charging_state != DC_STATE_ADJUST_CC)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_ADJUST_CC);
hl7132->charging_state = DC_STATE_ADJUST_CC;
ret = hl7132_check_error(hl7132);
if (ret != 0)
goto error; // This is not active mode.
ccmode = hl7132_check_status(hl7132);
if (ccmode < 0) {
ret = ccmode;
goto error;
}
switch (ccmode) {
case STS_MODE_IIN_LOOP:
hl7132->chg_data.iin_loop_count++;
fallthrough;
case STS_MODE_CHG_LOOP: /* CHG_LOOP does't exist */
if (hl7132->ta_cur > HL7132_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "End2: ta_cur=%u, ta_vol=%u",
hl7132->ta_cur, hl7132->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "End3: ta_cur=%u, ta_vol=%u",
hl7132->ta_cur, hl7132->ta_vol);
}
hl7132->prev_inc = INC_NONE;
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CC_MODE);
/* Send PD Message and then go to CC mode */
hl7132->charging_state = DC_STATE_CC_MODE;
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
vbatt = hl7132_read_adc(hl7132, ADCCH_VBAT);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "End4: vbatt=%d, ta_vol=%u",
vbatt, hl7132->ta_vol);
/* Clear TA increment flag */
hl7132->prev_inc = INC_NONE;
/* Go to Pre-CV mode */
hl7132->timer_id = TIMER_ENTER_CVMODE;
hl7132->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"Inactive: iin=%d, iin_cc=%d, cc_max=%d",
iin, hl7132->iin_cc, hl7132->cc_max);
if (iin < 0)
break;
hl7132_adjust_ccmode_wired(hl7132, iin);
hl7132->prev_iin = iin;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = hl7132_read_adc(hl7132, ADCCH_VIN);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "VIN_UVLO: ta_vol=%u, vin_vol=%d",
hl7132->ta_cur, vin_vol);
/* Check VIN after 1sec */
hl7132->timer_id = TIMER_ADJUST_CCMODE;
hl7132->timer_period = 1000;
break;
default:
goto error;
}
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
error:
mutex_unlock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: End, ret=%d, ccmode=%d\n", __func__, ret,
ccmode);
return ret;
}
/* <0 error, 0 no new limits, >0 new limits */
static int hl7132_apply_new_limits(struct hl7132_charger *hl7132)
{
int ret = 0;
if (hl7132->new_iin && hl7132->new_iin < hl7132->iin_cc) {
ret = hl7132_apply_new_iin(hl7132);
if (ret == 0)
ret = 1;
} else if (hl7132->new_vfloat) {
ret = hl7132_apply_new_vfloat(hl7132);
if (ret == 0)
ret = 1;
} else if (hl7132->new_iin) {
ret = hl7132_apply_new_iin(hl7132);
if (ret == 0)
ret = 1;
} else {
return 0;
}
return ret;
}
/* 2:1 Direct Charging CC MODE control */
static int hl7132_charge_ccmode(struct hl7132_charger *hl7132)
{
int ccmode = -1, vin_vol, iin, ret = 0;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
mutex_lock(&hl7132->lock);
if (hl7132->charging_state != DC_STATE_CC_MODE)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CC_MODE);
hl7132->charging_state = DC_STATE_CC_MODE;
hl7132_prlog_state(hl7132, __func__);
ret = hl7132_check_error(hl7132);
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.
* hl7132_apply_new_limits() changes hl7132->charging_state to
* DC_STATE_ADJUST_TAVOL or DC_STATE_ADJUST_TACUR when new limits
* need to be applied.
*/
ret = hl7132_apply_new_limits(hl7132);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
ccmode = hl7132_check_status(hl7132);
if (ccmode < 0) {
ret = ccmode;
goto error_exit;
}
switch (ccmode) {
case STS_MODE_LOOP_INACTIVE:
{
/* Set input current compensation */
const int ta_max_vol = hl7132->ta_max_vol;
/* Check TA current with TA_MIN_CUR */
if (hl7132->ta_cur <= HL7132_TA_MIN_CUR) {
hl7132->ta_cur = HL7132_TA_MIN_CUR;
ret = hl7132_set_ta_voltage_comp(hl7132);
} else if (ta_max_vol >= hl7132->pdata->ta_max_vol_cp) {
ret = hl7132_set_ta_current_comp(hl7132);
} else {
/* constant power mode */
ret = hl7132_set_ta_current_comp2(hl7132);
}
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"INACTIVE2: ta_cur=%u, ta_vol=%u",
hl7132->ta_cur,
hl7132->ta_vol);
break;
}
case STS_MODE_VFLT_LOOP:
/* TODO: adjust fv_uv here based on real vbatt */
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG, "CC VFLOAT: iin=%d", iin);
/* go to Pre-CV mode */
hl7132->timer_id = TIMER_ENTER_CVMODE;
hl7132->timer_period = 0;
break;
case STS_MODE_IIN_LOOP:
hl7132->chg_data.iin_loop_count++;
fallthrough;
case STS_MODE_CHG_LOOP:
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
if (iin < 0)
break;
if (hl7132->ta_cur <= HL7132_TA_MIN_CUR) {
/* Decrease TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"IIN_LOOP2: iin=%d, next_ta_vol=%u",
iin, hl7132->ta_vol);
} else {
/* Decrease TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"IIN_LOOP3: iin=%d, next_ta_cur=%u",
iin, hl7132->ta_cur);
}
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = hl7132_read_adc(hl7132, ADCCH_VIN);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
hl7132->ta_cur, hl7132->ta_vol, vin_vol);
/* Check VIN after 1sec */
hl7132->timer_id = TIMER_CHECK_CCMODE;
hl7132->timer_period = 1000;
break;
default:
break;
}
done:
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
error_exit:
mutex_unlock(&hl7132->lock);
dev_dbg(hl7132->dev,
"%s: End, ccmode=%d timer_id=%d, timer_period=%lu ret=%d\n",
__func__, ccmode, hl7132->timer_id, hl7132->timer_period,
ret);
return ret;
}
/* 2:1 Direct Charging Start CV MODE control - Pre CV MODE */
static int hl7132_charge_start_cvmode(struct hl7132_charger *hl7132)
{
int ret = 0;
int cvmode;
int vin_vol;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
mutex_lock(&hl7132->lock);
if (hl7132->charging_state != DC_STATE_START_CV)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_START_CV);
hl7132->charging_state = DC_STATE_START_CV;
/* Check the charging type */
ret = hl7132_check_error(hl7132);
if (ret != 0)
goto error_exit;
/* Check the status */
cvmode = hl7132_check_status(hl7132);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
switch (cvmode) {
case STS_MODE_IIN_LOOP:
hl7132->chg_data.iin_loop_count++;
fallthrough;
case STS_MODE_CHG_LOOP:
/* Check TA current */
if (hl7132->ta_cur > HL7132_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_cur=%u",
__func__, hl7132->ta_cur);
} else {
/* TA current is less than 1.0A */
/* Decrease TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_vol=%u",
__func__, hl7132->ta_vol);
}
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
/* Decrease TA voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol -
HL7132_TA_VOL_STEP_PRE_CV *
hl7132->chg_mode;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: ta_vol=%u",
__func__, hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
/* Exit Pre CV mode */
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: PreCV End: ta_vol=%u, ta_cur=%u",
__func__, hl7132->ta_vol, hl7132->ta_cur);
/* Need to implement notification to other driver */
/* To do here */
/* Go to CV mode */
hl7132->timer_id = TIMER_CHECK_CVMODE;
hl7132->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = hl7132_read_adc(hl7132, ADCCH_VIN);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: PreCV VIN_UVLO: ta_vol=%u, vin_vol=%u",
__func__, hl7132->ta_cur, vin_vol);
/* Check VIN after 1sec */
hl7132->timer_id = TIMER_ENTER_CVMODE;
hl7132->timer_period = 1000;
break;
default:
break;
}
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
error_exit:
mutex_unlock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: End, cvmode=%d, ret=%d\n", __func__, cvmode,
ret);
return ret;
}
static int hl7132_check_eoc(struct hl7132_charger *hl7132)
{
const int eoc_tolerance = 25000; /* 25mV under max vbat_reg */
const int vlimit = HL7132_COMP_VFLOAT_MAX - eoc_tolerance;
int iin, vbat;
iin = hl7132_read_adc(hl7132, ADCCH_IIN);
if (iin < 0) {
dev_err(hl7132->dev, "%s: iin=%d\n", __func__, iin);
return iin;
}
vbat = hl7132_read_adc(hl7132, ADCCH_VBAT);
if (vbat < 0) {
dev_err(hl7132->dev, "%s: vbat=%d\n", __func__, vbat);
return vbat;
}
dev_dbg(hl7132->dev, "%s: iin=%d, topoff=%u, vbat=%d vlimit=%d\n",
__func__, iin, hl7132->pdata->iin_topoff, vbat, vlimit);
return iin < hl7132->pdata->iin_topoff && vbat >= vlimit;
}
/* 2:1 Direct Charging CV MODE control */
static int hl7132_charge_cvmode(struct hl7132_charger *hl7132)
{
int ret = 0;
int cvmode;
int vin_vol;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
mutex_lock(&hl7132->lock);
if (hl7132->charging_state != DC_STATE_CV_MODE)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CV_MODE);
hl7132->charging_state = DC_STATE_CV_MODE;
ret = hl7132_check_error(hl7132);
if (ret != 0)
goto error_exit;
/*
* A change in vbat_reg and cc_max here is a normal tier transition, a
* change in iin means that the thermal engine has changed cc_max.
*/
ret = hl7132_apply_new_limits(hl7132);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
cvmode = hl7132_check_status(hl7132);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
if (cvmode == STS_MODE_LOOP_INACTIVE) {
ret = hl7132_check_eoc(hl7132);
if (ret < 0)
goto error_exit;
if (ret)
cvmode = STS_MODE_CHG_DONE;
}
switch (cvmode) {
case STS_MODE_CHG_DONE: {
const bool done_already = hl7132->charging_state ==
DC_STATE_CHARGING_DONE;
if (!done_already)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n",
__func__, hl7132->charging_state,
DC_STATE_CHARGING_DONE);
/* Keep CV mode until driver send stop charging */
hl7132->charging_state = DC_STATE_CHARGING_DONE;
power_supply_changed(hl7132->mains);
/* _cpm already came in */
if (hl7132->charging_state == DC_STATE_NO_CHARGING) {
dev_dbg(hl7132->dev, "%s: Already stop DC\n", __func__);
break;
}
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: done_already=%d charge Done\n", __func__,
done_already);
hl7132->timer_id = TIMER_CHECK_CVMODE;
hl7132->timer_period = HL7132_CVMODE_CHECK_T;
} break;
case STS_MODE_IIN_LOOP:
hl7132->chg_data.iin_loop_count++;
fallthrough;
case STS_MODE_CHG_LOOP:
/* Check TA current */
if (hl7132->ta_cur > HL7132_TA_MIN_CUR) {
/* TA current is higher than (1.0A*chg_mode) */
/* Decrease TA current (50mA) */
hl7132->ta_cur = hl7132->ta_cur -
PD_MSG_TA_CUR_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_cur=%u",
__func__, hl7132->ta_cur);
} else {
/* TA current is less than (1.0A*chg_mode) */
/* Decrease TA Voltage (20mV) */
hl7132->ta_vol = hl7132->ta_vol -
PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_vol=%u",
__func__, hl7132->ta_vol);
}
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
/* Decrease TA voltage */
hl7132->ta_vol = hl7132->ta_vol -
PD_MSG_TA_VOL_STEP;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: ta_vol=%u",
__func__, hl7132->ta_vol);
/* Send PD Message */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
hl7132->timer_id = TIMER_CHECK_CVMODE;
hl7132->timer_period = HL7132_CVMODE_CHECK_T;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = hl7132_read_adc(hl7132, ADCCH_VIN);
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: CC VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
__func__, hl7132->ta_cur, hl7132->ta_vol,
vin_vol);
/* Check VIN after 1sec */
hl7132->timer_id = TIMER_CHECK_CVMODE;
hl7132->timer_period = 1000;
break;
default:
break;
}
done:
dev_dbg(hl7132->dev,
"%s: reschedule next id=%d period=%ld chg_state=%d\n",
__func__, hl7132->timer_id, hl7132->timer_period,
hl7132->charging_state);
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
error_exit:
mutex_unlock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: End, ret=%d cvmode=%d next\n", __func__, ret,
cvmode);
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 hl7132_preset_dcmode(struct hl7132_charger *hl7132)
{
int vbat;
int ret = 0;
unsigned int ta_max_vol;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
dev_dbg(hl7132->dev, "%s: = charging_state=%u ==\n", __func__,
hl7132->charging_state);
/* gcpm set ->cc_max and ->fv_uv before starting */
if (hl7132->cc_max < 0 || hl7132->fv_uv < 0) {
dev_err(hl7132->dev, "%s: cc_max=%d fv_uv=%d invalid\n",
__func__, hl7132->cc_max, hl7132->fv_uv);
return -EINVAL;
}
if (hl7132->charging_state != DC_STATE_PRESET_DC)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_PRESET_DC);
hl7132->charging_state = DC_STATE_PRESET_DC;
/* VBAT is over threshold but it might be "bouncy" due to transitory */
vbat = hl7132_read_adc(hl7132, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* vbat_reg is set on start from GCPM */
if (vbat > hl7132->fv_uv) {
dev_err(hl7132->dev,
"%s: vbat adc=%d is higher than VFLOAT=%d\n",
__func__, vbat, hl7132->fv_uv);
ret = -EINVAL;
goto error;
}
/* determined by ->cfg_iin and cc_max */
hl7132->ta_max_cur = hl7132_get_iin_max(hl7132, hl7132->cc_max);
dev_dbg(hl7132->dev,
"%s: ta_max_cur=%u, iin_cfg=%u, hl7132->ta_type=%d\n",
__func__, hl7132->ta_max_cur, hl7132->pdata->iin_cfg,
hl7132->ta_type);
/* HW integration guide Section 5.2 - check initialization */
if (hl7132_check_init(hl7132)) {
if (hl7132->hw_init_retry_cnt >= hl7132->pdata->max_init_retry) {
dev_err(hl7132->dev,
"%s: initialization retries failed (%d/%d) - exit 2:1 mode\n",
__func__, hl7132->hw_init_retry_cnt,
hl7132->pdata->max_init_retry);
hl7132->charging_state = DC_STATE_ERROR;
hl7132_vote_dc_avail(hl7132, 0, 1);
ret = -EINVAL;
goto error;
} else {
hl7132->hw_init_retry_cnt++;
dev_warn(hl7132->dev,
"%s: initialization not valid, retry (%d/%d)\n",
__func__, hl7132->hw_init_retry_cnt,
hl7132->pdata->max_init_retry);
ret = -EAGAIN;
goto error;
}
}
hl7132->hw_init_retry_cnt = 0;
ta_max_vol = hl7132->pdata->ta_max_vol * hl7132->chg_mode;
if (hl7132->ftm_mode)
goto skip_pps;
/*
* 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 = hl7132_get_apdo_max_power(hl7132, ta_max_vol, HL7132_TA_MAX_CUR);
if (ret < 0) {
dev_warn(hl7132->dev, "%s: No APDO to support 2:1 for %d\n",
__func__, HL7132_TA_MAX_CUR);
ret = hl7132_get_apdo_max_power(hl7132, ta_max_vol, 0);
}
if (ret < 0) {
dev_err(hl7132->dev, "%s: No APDO to support 2:1\n", __func__);
hl7132->charging_state = DC_STATE_ERROR;
hl7132_vote_dc_avail(hl7132, 0, 1);
goto error;
}
skip_pps:
/*
* ->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 = hl7132_set_wired_dc(hl7132, vbat);
if (ret < 0) {
dev_err(hl7132->dev, "%s: set wired failed (%d)\n", __func__,
ret);
hl7132->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(hl7132, LOGLEVEL_INFO,
"Preset DC, objpos=%d ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
hl7132->ta_objpos, hl7132->ta_max_vol, hl7132->ta_max_cur,
hl7132->ta_max_pwr, hl7132->iin_cc, hl7132->chg_mode);
error:
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Preset direct charging configuration and start charging */
static int hl7132_preset_config(struct hl7132_charger *hl7132)
{
int ret = 0;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
mutex_lock(&hl7132->lock);
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_PRESET_DC);
hl7132->charging_state = DC_STATE_PRESET_DC;
/* HW integration guide section 5.4.3.a - set CC mode current */
/* ->iin_cc and ->fv_uv are configured externally */
ret = hl7132_set_input_current(hl7132, hl7132->pdata->iin_cfg);
if (ret < 0)
goto error;
/* HW integration guide section 5.4.3.b - set CV mode voltage */
ret = hl7132_set_vbat_reg(hl7132, hl7132->fv_uv);
if (ret < 0)
goto error;
/* HW integration guide section 5.4.3.c - enable QRB FET & CP */
/* Enable HL7132 unless aready enabled */
ret = hl7132_set_charging(hl7132, true);
if (ret < 0)
goto error;
/* Clear previous iin adc */
hl7132->prev_iin = 0;
hl7132->prev_inc = INC_NONE;
/* Go to CHECK_ACTIVE state after 150ms */
hl7132->timer_id = TIMER_CHECK_ACTIVE;
hl7132->timer_period = HL7132_ENABLE_DELAY_T;
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
error:
mutex_unlock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* Check the charging status at start before entering the adjust cc mode or
* from hl7132_send_message() after a failure.
*/
static int hl7132_check_active_state(struct hl7132_charger *hl7132)
{
int ret = 0;
dev_dbg(hl7132->dev, "%s: ======START=======\n", __func__);
dev_dbg(hl7132->dev, "%s: = charging_state=%u ==\n", __func__,
hl7132->charging_state);
mutex_lock(&hl7132->lock);
if (hl7132->charging_state != DC_STATE_CHECK_ACTIVE)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CHECK_ACTIVE);
hl7132->charging_state = DC_STATE_CHECK_ACTIVE;
ret = hl7132_check_error(hl7132);
if (ret == 0) {
/* HL7132 is active state */
hl7132->retry_cnt = 0;
hl7132->timer_id = TIMER_ADJUST_CCMODE;
hl7132->timer_period = 0;
} else if (ret == -EAGAIN) {
/* try restarting only */
if (hl7132->retry_cnt >= HL7132_MAX_RETRY_CNT) {
dev_err(hl7132->dev, "%s: retry failed\n", __func__);
hl7132->charging_state = DC_STATE_ERROR;
hl7132_vote_dc_avail(hl7132, 0, 1);
ret = -EINVAL;
goto exit_done;
}
/*
* HW integration guide section 5.5 - Disable charging
*
* 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 = hl7132_set_charging(hl7132, false);
dev_err(hl7132->dev, "%s: retry cnt=%d, (%d)\n", __func__,
hl7132->retry_cnt, ret);
if (ret == 0) {
hl7132->timer_id = TIMER_PRESET_DC;
hl7132->timer_period = 0;
hl7132->retry_cnt++;
}
} else {
dev_err(hl7132->dev, "%s: Error! disabling hl7132: ret(%d)\n",
__func__, ret);
hl7132->charging_state = DC_STATE_ERROR;
hl7132_vote_dc_avail(hl7132, 0, 1);
}
exit_done:
/* Implement error handler function if it is needed */
if (ret < 0) {
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: charging_state=%d, not active or error (%d)",
__func__, hl7132->charging_state, ret);
hl7132->timer_id = TIMER_ID_NONE;
hl7132->timer_period = 0;
}
if (!hl7132->ftm_mode)
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
mutex_unlock(&hl7132->lock);
return ret;
}
/* Enter direct charging algorithm */
static int hl7132_start_direct_charging(struct hl7132_charger *hl7132)
{
struct hl7132_chg_stats *chg_data = &hl7132->chg_data;
int ret = 0;
mutex_lock(&hl7132->lock);
/* configure DC charging type for the requested index */
if (!hl7132->ftm_mode)
ret = hl7132_set_ta_type(hl7132, hl7132->pps_index);
dev_info(hl7132->dev, "%s: Current ta_type=%d, chg_mode=%d\n", __func__,
hl7132->ta_type, hl7132->chg_mode);
if (ret < 0)
goto error_done;
/* wake lock */
__pm_stay_awake(hl7132->monitor_wake_lock);
/* Preset charging configuration and TA condition */
ret = hl7132_preset_dcmode(hl7132);
if (ret == 0) {
/* Configure the TA and start charging */
hl7132->timer_id = TIMER_PDMSG_SEND;
hl7132->timer_period = 0;
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
}
error_done:
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
hl7132_chg_stats_update(chg_data, hl7132);
mutex_unlock(&hl7132->lock);
return ret;
}
/* Check Vbat minimum level to start direct charging */
static int hl7132_check_vbatmin(struct hl7132_charger *hl7132)
{
int ret = 0, vbat;
unsigned int val = 0;
mutex_lock(&hl7132->lock);
if (hl7132->charging_state != DC_STATE_CHECK_VBAT)
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CHECK_VBAT);
hl7132->charging_state = DC_STATE_CHECK_VBAT;
/* HW integration guide section 5.4.2 */
ret = regmap_read(hl7132->regmap, HL7132_REG_STATUS_A, &val);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read STATUS_A\n", __func__);
goto error;
}
if (val & HL7132_BIT_VIN_UVLO_STS) {
dev_err(hl7132->dev,
"%s: USB not inserted, not starting charging\n",
__func__);
ret = -EINVAL;
goto error;
}
ret = regmap_read(hl7132->regmap, HL7132_REG_INT_STS_A, &val);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read INT_STS_A\n", __func__);
goto error;
}
val = (val & HL7132_BIT_STATE_CHG_STS) >> MASK2SHIFT(HL7132_BIT_STATE_CHG_STS);
switch (val) {
case STATE_CHG_STS_RESET:
dev_err(hl7132->dev,
"%s: Chip in RESET mode, not starting charging\n",
__func__);
ret = -EINVAL;
break;
case STATE_CHG_STS_SHUTDOWN:
/* Exit 2:1 mode */
hl7132->charging_state = DC_STATE_NO_CHARGING;
hl7132_vote_dc_avail(hl7132, 0, 1);
ret = -EINVAL;
break;
case STATE_CHG_STS_STANDBY:
/* Ready to charge, nothing needed here */
break;
case STATE_CHG_STS_ACTIVE:
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_0, &val);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read REG_CTRL_0\n",
__func__);
goto error;
}
if ((val & HL7132_BIT_CHG_EN) == 0) {
dev_err(hl7132->dev,
"%s: Chip reports ACTIVE but CHG_EN=0, reinitializing\n",
__func__);
hl7132->hw_init_done = false;
ret = -EAGAIN;
if (hl7132_hw_init(hl7132) == 0)
hl7132->hw_init_done = true;
else
ret = -EINVAL;
goto error;
}
/* No errors, continue charging */
break;
default:
/* This should never be hit, the above 4 states enumerate all
* possible states reported by 2 bits
*/
dev_err(hl7132->dev, "%s: Unexpected STATE_CHG_STS %d\n",
__func__, val);
ret = -EINVAL;
goto error;
}
if (hl7132->hw_init_done == false)
if (!hl7132_hw_init(hl7132))
hl7132->hw_init_done = true;
vbat = hl7132_read_adc(hl7132, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* wait for CPM to send in the params */
if (hl7132->cc_max < 0 || hl7132->fv_uv < 0 || !hl7132->hw_init_done) {
dev_dbg(hl7132->dev,
"%s: not yet fv_uv=%d, cc_max=%d vbat=%d, hw_init_done=%d\n",
__func__, hl7132->fv_uv, hl7132->cc_max, vbat,
hl7132->hw_init_done);
/* retry again after 1sec */
hl7132->timer_id = TIMER_VBATMIN_CHECK;
hl7132->timer_period = HL7132_VBATMIN_CHECK_T;
hl7132->retry_cnt += 1;
} else {
logbuffer_prlog(hl7132, LOGLEVEL_INFO,
"%s: starts at fv_uv=%d, cc_max=%d vbat=%d (min=%d)",
__func__, hl7132->fv_uv, hl7132->cc_max, vbat,
HL7132_DC_VBAT_MIN);
hl7132->timer_id = TIMER_PRESET_DC;
hl7132->timer_period = 0;
hl7132->retry_cnt = 0; /* start charging */
}
/* timeout for VBATMIN or charging parameters */
if (hl7132->retry_cnt > HL7132_MAX_RETRY_CNT) {
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: TIMEOUT fv_uv=%d, cc_max=%d vbat=%d limit=%d",
__func__, hl7132->fv_uv, hl7132->cc_max, vbat,
HL7132_DC_VBAT_MIN);
ret = -ETIMEDOUT;
} else {
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
}
error:
mutex_unlock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* return 1 if apdo switch, 0 if no switch. < 0 on err.
* TODO : lower input current per TCPC spec
*/
static int hl7132_check_apdo_switch(struct hl7132_charger *hl7132)
{
unsigned int ta_max_vol, ta_max_cur, ta_objpos;
unsigned int new_ta_cur, new_ta_max_cur, val;
int ret;
dev_dbg(hl7132->dev,
"%s:START: ta_vol: %d, prev_ta_vol: %d, ta_cur: %d, prev_ta_cur: %d\n",
__func__, hl7132->ta_vol, hl7132->prev_ta_vol, hl7132->ta_cur,
hl7132->prev_ta_cur);
ta_max_vol = hl7132->ta_vol;
ta_max_cur = hl7132->ta_cur;
ret = hl7132_get_apdo_index(hl7132, &ta_max_vol, &ta_max_cur, &ta_objpos);
if (ret) {
dev_dbg(hl7132->dev, "%s: error getting apdo index (%d)\n",
__func__, ret);
return ret;
}
if (hl7132->prev_ta_cur == hl7132->ta_cur && hl7132->prev_ta_vol == hl7132->ta_vol) {
hl7132->ta_objpos = ta_objpos;
return 0;
}
if (ta_objpos == hl7132->ta_objpos) {
dev_dbg(hl7132->dev, "%s: stay at apdo %d\n", __func__,
ta_objpos);
return 0;
}
if (hl7132->prev_ta_cur < hl7132->ta_cur) {
/* Should never happen as we limit to ta_max_cur */
dev_err(hl7132->dev,
"%s: ta_cur: %d > ta_max_cur %d causing APDO switch\n",
__func__, hl7132->ta_cur, hl7132->ta_max_cur);
hl7132->ta_cur = hl7132->ta_max_cur;
ret = -EINVAL;
} else if (hl7132->prev_ta_vol != hl7132->ta_vol) {
const long power = (hl7132->prev_ta_cur / 1000) * (hl7132->prev_ta_vol / 1000);
new_ta_cur = (power / (hl7132->ta_vol / 1000)) * 1000;
new_ta_max_cur = new_ta_cur;
ta_max_vol = hl7132->ta_vol;
dev_dbg(hl7132->dev,
"%s: find new ta_cur: ta_vol: %d, ta_cur: %d\n",
__func__, hl7132->ta_vol, new_ta_cur);
ret = hl7132_get_apdo_index(hl7132, &ta_max_vol, &new_ta_max_cur, &ta_objpos);
if (ret) {
new_ta_max_cur = 0;
ta_max_vol = hl7132->ta_vol;
ret = hl7132_get_apdo_index(hl7132, &ta_max_vol, &new_ta_max_cur,
&ta_objpos);
if (ret) {
dev_err(hl7132->dev,
"No available APDO to switch to (%d)\n",
ret);
} else {
/* APDO can't provide needed ta_cur, so limit to max */
val = new_ta_max_cur / PD_MSG_TA_CUR_STEP;
hl7132->ta_cur = val * PD_MSG_TA_CUR_STEP;
hl7132->ta_max_cur = hl7132->ta_cur;
}
} else {
val = new_ta_cur / PD_MSG_TA_CUR_STEP;
hl7132->ta_cur = val * PD_MSG_TA_CUR_STEP;
hl7132->ta_max_cur = new_ta_max_cur;
}
}
if (!ret && ta_objpos != hl7132->ta_objpos) {
const int temp_cur = hl7132->ta_cur;
dev_info(hl7132->dev,
"ta_vol: %d->%d, ta_cur: %d->%d, ta_pos: %d->%d\n",
hl7132->prev_ta_vol, hl7132->ta_vol, hl7132->prev_ta_cur,
hl7132->ta_cur, hl7132->ta_objpos, ta_objpos);
hl7132->ta_objpos = ta_objpos;
/* Send one message immediately */
/* force only voltage change */
hl7132->ta_cur = hl7132->prev_ta_cur;
ret = hl7132_send_pd_message(hl7132, PD_MSG_REQUEST_APDO);
if (ret < 0)
return ret;
hl7132->ta_cur = temp_cur;
ret = 1;
}
return ret;
}
static int hl7132_send_message(struct hl7132_charger *hl7132)
{
int val, ret;
const int timer_id = hl7132->timer_id;
/* Go to the next state */
mutex_lock(&hl7132->lock);
dev_dbg(hl7132->dev, "%s: ====== START =======\n", __func__);
if (hl7132->ftm_mode)
goto skip_pps;
/* Adjust TA current and voltage step */
/* PPS voltage resolution is 20mV */
val = hl7132->ta_vol / PD_MSG_TA_VOL_STEP;
hl7132->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* PPS current resolution is 50mA */
val = hl7132->ta_cur / PD_MSG_TA_CUR_STEP;
hl7132->ta_cur = val * PD_MSG_TA_CUR_STEP;
/* PPS minimum current is 1000mA */
if (hl7132->ta_cur < HL7132_TA_MIN_CUR)
hl7132->ta_cur = HL7132_TA_MIN_CUR;
dev_dbg(hl7132->dev, "%s: ta_type=%d, ta_vol=%d ta_cur=%d\n", __func__,
hl7132->ta_type, hl7132->ta_vol, hl7132->ta_cur);
if (!hl7132->prev_ta_cur)
hl7132->prev_ta_cur = hl7132->ta_cur;
if (!hl7132->prev_ta_vol)
hl7132->prev_ta_vol = hl7132->ta_vol;
hl7132_check_apdo_switch(hl7132);
/* Send PD Message */
ret = hl7132_send_pd_message(hl7132, PD_MSG_REQUEST_APDO);
if (ret >= 0) {
hl7132->prev_ta_cur = hl7132->ta_cur;
hl7132->prev_ta_vol = hl7132->ta_vol;
}
skip_pps:
switch (hl7132->charging_state) {
case DC_STATE_PRESET_DC:
hl7132->timer_id = TIMER_PRESET_CONFIG;
break;
case DC_STATE_ADJUST_CC:
hl7132->timer_id = TIMER_ADJUST_CCMODE;
break;
case DC_STATE_CC_MODE:
hl7132->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_START_CV:
hl7132->timer_id = TIMER_ENTER_CVMODE;
break;
case DC_STATE_CV_MODE:
hl7132->timer_id = TIMER_CHECK_CVMODE;
break;
case DC_STATE_ADJUST_TAVOL:
hl7132->timer_id = TIMER_ADJUST_TAVOL;
break;
case DC_STATE_ADJUST_TACUR:
hl7132->timer_id = TIMER_ADJUST_TACUR;
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0) {
dev_err(hl7132->dev, "%s: Error-send_pd_message to %d (%d)\n",
__func__, hl7132->ta_type, ret);
hl7132->timer_id = TIMER_CHECK_ACTIVE;
}
if (hl7132->ftm_mode)
hl7132->timer_period = 0;
else
hl7132->timer_period = HL7132_PDMSG_WAIT_T;
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: charging_state=%u timer_id:%d->%d ret=%d",
__func__, hl7132->charging_state,
timer_id, hl7132->timer_id, ret);
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
dev_dbg(hl7132->dev, "%s: End: timer_id=%d timer_period=%lu\n", __func__,
hl7132->timer_id, hl7132->timer_period);
mutex_unlock(&hl7132->lock);
return ret;
}
/* delayed work function for charging timer */
static void hl7132_timer_work(struct work_struct *work)
{
struct hl7132_charger *hl7132 =
container_of(work, struct hl7132_charger, timer_work.work);
unsigned int charging_state;
int timer_id;
int ret = 0;
dev_dbg(hl7132->dev, "%s: ========= START =========\n", __func__);
/* TODO: remove locks from the calls and run all of this locked */
mutex_lock(&hl7132->lock);
hl7132_chg_stats_update(&hl7132->chg_data, hl7132);
charging_state = hl7132->charging_state;
timer_id = hl7132->timer_id;
dev_dbg(hl7132->dev, "%s: timer id=%d, charging_state=%u\n", __func__,
hl7132->timer_id, charging_state);
mutex_unlock(&hl7132->lock);
switch (timer_id) {
/* charging_state <- DC_STATE_CHECK_VBAT */
case TIMER_VBATMIN_CHECK:
ret = hl7132_check_vbatmin(hl7132);
if (ret < 0)
goto error;
break;
/* charging_state <- DC_STATE_PRESET_DC */
case TIMER_PRESET_DC:
ret = hl7132_start_direct_charging(hl7132);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* preset configuration, start charging
*/
case TIMER_PRESET_CONFIG:
ret = hl7132_preset_config(hl7132);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* 150 ms after preset_config
*/
case TIMER_CHECK_ACTIVE:
ret = hl7132_check_active_state(hl7132);
if (ret < 0)
goto error;
break;
case TIMER_ADJUST_CCMODE:
ret = hl7132_charge_adjust_ccmode(hl7132);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CCMODE:
ret = hl7132_charge_ccmode(hl7132);
if (ret < 0)
goto error;
break;
case TIMER_ENTER_CVMODE:
/* Enter Pre-CV mode */
ret = hl7132_charge_start_cvmode(hl7132);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CVMODE:
ret = hl7132_charge_cvmode(hl7132);
if (ret < 0)
goto error;
break;
case TIMER_PDMSG_SEND:
ret = hl7132_send_message(hl7132);
if (ret < 0)
goto error;
break;
/* called from 2 contexts */
case TIMER_ADJUST_TAVOL:
mutex_lock(&hl7132->lock);
ret = hl7132_adjust_ta_voltage(hl7132);
if (ret < 0) {
mutex_unlock(&hl7132->lock);
goto error;
}
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
mutex_unlock(&hl7132->lock);
break;
/* called from 2 contexts */
case TIMER_ADJUST_TACUR:
mutex_lock(&hl7132->lock);
ret = hl7132_adjust_ta_current(hl7132);
if (ret < 0) {
mutex_unlock(&hl7132->lock);
goto error;
}
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
mutex_unlock(&hl7132->lock);
break;
case TIMER_ID_NONE:
ret = hl7132_stop_charging(hl7132);
if (ret < 0)
goto error;
break;
default:
break;
}
/* Check the charging state again */
if (hl7132->charging_state == DC_STATE_NO_CHARGING) {
cancel_delayed_work(&hl7132->timer_work);
cancel_delayed_work(&hl7132->pps_work);
}
dev_dbg(hl7132->dev,
"%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld\n",
__func__, timer_id, hl7132->timer_id, charging_state,
hl7132->charging_state, hl7132->timer_period);
return;
error:
dev_dbg(hl7132->dev, "%s: ========= ERROR =========\n", __func__);
logbuffer_prlog(hl7132, LOGLEVEL_ERR,
"%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld ret=%d",
__func__, timer_id, hl7132->timer_id, charging_state,
hl7132->charging_state, hl7132->timer_period, ret);
hl7132_stop_charging(hl7132);
}
/* delayed work function for pps periodic timer */
static void hl7132_pps_request_work(struct work_struct *work)
{
struct hl7132_charger *hl7132 = container_of(work,
struct hl7132_charger, pps_work.work);
int ret = 0;
dev_dbg(hl7132->dev, "%s: = charging_state=%u ==\n", __func__,
hl7132->charging_state);
if (!hl7132->ftm_mode)
ret = hl7132_send_pd_message(hl7132, PD_MSG_REQUEST_APDO);
if (ret < 0)
dev_err(hl7132->dev, "%s: Error-send_pd_message\n", __func__);
/* TODO: do other background stuff */
dev_dbg(hl7132->dev, "%s: ret=%d\n", __func__, ret);
}
enum {
ENUM_INT,
ENUM_INT_MASK,
ENUM_INT_STS_A,
ENUM_INT_STS_B,
ENUM_INT_MAX,
};
static irqreturn_t hl7132_interrupt_handler(int irg, void *data)
{
struct hl7132_charger *hl7132 = data;
u8 r_buf[ENUM_INT_MAX];
u8 masked;
int ret = 0;
bool handled = false;
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_INT, r_buf, 4);
if (ret < 0) {
dev_warn(hl7132->dev, "Failed to read interrupt registers\n");
return IRQ_NONE;
}
masked = r_buf[ENUM_INT] & ~r_buf[ENUM_INT_MASK];
dev_dbg(hl7132->dev,
"INT=0x%2x, INT_MSK=0x%2x, STS_A=0x%2x, STS_B=0x%2x, masked=0x%2x\n",
r_buf[ENUM_INT], r_buf[ENUM_INT_MASK], r_buf[ENUM_INT_STS_A],
r_buf[ENUM_INT_STS_B], masked);
if (masked & HL7132_BIT_STATE_CHG_I) {
dev_info(hl7132->dev, "[%s] dev_state changed!\n", __func__);
handled = true;
}
if (masked & HL7132_BIT_REG_I) {
dev_info(hl7132->dev, "[%s] regulation status changed!\n", __func__);
handled = true;
}
if (masked & HL7132_BIT_TS_TEMP_I) {
dev_info(hl7132->dev, "[%s] TS threshold crossed, disabling chip!\n", __func__);
handled = true;
}
if (masked & HL7132_BIT_V_OK_I) {
dev_info(hl7132->dev, "[%s] V_OK_I changed!\n", __func__);
handled = true;
}
if (masked & HL7132_BIT_CUR_I) {
dev_info(hl7132->dev, "[%s] CUR_I changed!\n", __func__);
handled = true;
}
if (masked & HL7132_BIT_SHORT_I) {
dev_info(hl7132->dev, "[%s] SHORT_I changed!\n", __func__);
handled = true;
}
if (masked & HL7132_BIT_WDOG_I) {
dev_info(hl7132->dev, "[%s] WDOG_I changed!\n", __func__);
handled = true;
}
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static int hl7132_irq_init(struct hl7132_charger *hl7132,
struct i2c_client *client)
{
const struct hl7132_platform_data *pdata = hl7132->pdata;
int ret, irq;
irq = gpio_to_irq(pdata->irq_gpio);
ret = devm_gpio_request_one(hl7132->dev, pdata->irq_gpio, GPIOF_IN,
client->name);
if (ret < 0)
goto fail;
ret = devm_request_threaded_irq(hl7132->dev, irq, NULL,
hl7132_interrupt_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, hl7132);
if (ret < 0)
goto fail_gpio;
/* All interrupts are masked by default. hl7132_hw_init unmasks
* the TS interrupt.
*/
client->irq = irq;
return 0;
fail_gpio:
gpio_free(pdata->irq_gpio);
fail:
free_irq(irq, hl7132);
client->irq = 0;
return ret;
}
/* Returns the input current limit programmed into the charger in uA. */
int hl7132_input_current_limit(struct hl7132_charger *hl7132)
{
int ret, intval;
unsigned int val;
if (!hl7132->mains_online)
return -ENODATA;
ret = regmap_read(hl7132->regmap, HL7132_REG_IIN_REG, &val);
if (ret < 0)
return ret;
/* 50 mA/step * 1000 uA/mA = 50000 uA/step). */
intval = (val & HL7132_BITS_IIN_REG_TH) * 50000;
if (intval < 1000000) /* HL7132 min is 1A */
intval = 1000000;
return intval;
}
/* Returns the constant charge current requested from GCPM */
static int get_const_charge_current(struct hl7132_charger *hl7132)
{
/* Charging current cannot be controlled directly */
return hl7132->cc_max;
}
/* Return the constant charge voltage programmed into the charger in uV. */
static int hl7132_const_charge_voltage(struct hl7132_charger *hl7132)
{
unsigned int reg_val;
int ret;
if (!hl7132->mains_online)
return -ENODATA;
/* Read VBAT_REG register */
ret = regmap_read(hl7132->regmap, HL7132_REG_VBAT_REG, &reg_val);
if (ret < 0)
return ret;
/* Extract VBAT_REG_TH bits and convert to uV */
reg_val = (reg_val & HL7132_BITS_VBAT_REG_TH);
return (reg_val * HL7132_VBAT_REG_STEP) + HL7132_VBAT_REG_OFFSET;
}
/* index is the PPS source to use */
static int hl7132_set_charging_enabled(struct hl7132_charger *hl7132, int index)
{
int ret = 0;
if (index < 0 || index >= PPS_INDEX_MAX)
return -EINVAL;
mutex_lock(&hl7132->lock);
/* Done is detected in CV when iin goes UNDER topoff. */
if (hl7132->charging_state == DC_STATE_CHARGING_DONE)
index = 0;
if (index == 0) {
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: stop pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, hl7132->pps_index, index,
hl7132->charging_state,
hl7132->timer_id);
/* this is the same as stop charging */
hl7132->pps_index = 0;
cancel_delayed_work(&hl7132->timer_work);
cancel_delayed_work(&hl7132->pps_work);
/* will call hl7132_stop_charging() in timer_work() */
hl7132->timer_id = TIMER_ID_NONE;
hl7132->timer_period = 0;
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
} else if (hl7132->charging_state == DC_STATE_NO_CHARGING) {
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: start pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, hl7132->pps_index, index,
hl7132->charging_state,
hl7132->timer_id);
/* Start Direct Charging on Index */
hl7132->dc_start_time = get_boot_sec();
hl7132_chg_stats_init(&hl7132->chg_data);
hl7132->pps_index = index;
dev_info(hl7132->dev, "%s: charging_state=%u->%u\n", __func__,
hl7132->charging_state, DC_STATE_CHECK_VBAT);
/* PD is already in PE_SNK_STATE */
hl7132->charging_state = DC_STATE_CHECK_VBAT;
hl7132->timer_id = TIMER_VBATMIN_CHECK;
hl7132->timer_period = 0;
mod_delayed_work(hl7132->dc_wq, &hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
/* Set the initial charging step */
power_supply_changed(hl7132->mains);
} else if (hl7132->charging_state == DC_STATE_ERROR) {
logbuffer_prlog(hl7132, LOGLEVEL_DEBUG,
"%s: error pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, hl7132->pps_index, index,
hl7132->charging_state,
hl7132->timer_id);
ret = -EINVAL;
}
mutex_unlock(&hl7132->lock);
return ret;
}
static int hl7132_mains_set_property(struct power_supply *psy,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct hl7132_charger *hl7132 = power_supply_get_drvdata(psy);
int ret = 0;
dev_dbg(hl7132->dev, "%s: =========START=========\n", __func__);
dev_dbg(hl7132->dev, "%s: prop=%d, val=%d\n", __func__, prop,
val->intval);
if (!hl7132->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
if (val->intval == 0) {
ret = hl7132_stop_charging(hl7132);
if (ret < 0)
dev_err(hl7132->dev,
"%s: cannot stop charging (%d)\n",
__func__, ret);
hl7132->mains_online = false;
} else if (hl7132->mains_online == false) {
hl7132->mains_online = true;
}
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = hl7132_set_new_vfloat(hl7132, val->intval);
break;
/*
* HL7132 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 = hl7132_set_new_cc_max(hl7132, val->intval);
break;
/* CURRENT MAX, same as IIN is really only set by the algo */
case POWER_SUPPLY_PROP_CURRENT_MAX:
dev_dbg(hl7132->dev, "%s: set iin %d, ignore\n", __func__,
val->intval);
break;
/* allow direct setting, not used */
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
mutex_lock(&hl7132->lock);
ret = hl7132_set_new_iin(hl7132, val->intval);
mutex_unlock(&hl7132->lock);
break;
default:
ret = -EINVAL;
break;
}
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int hl7132_mains_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct hl7132_charger *hl7132 = power_supply_get_drvdata(psy);
int intval, rc, ret = 0;
dev_dbg(hl7132->dev, "%s: prop=%d, val=%d\n", __func__, prop,
val->intval);
if (!hl7132->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = hl7132->mains_online;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = hl7132_is_present(hl7132);
if (val->intval < 0)
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = hl7132_const_charge_voltage(hl7132);
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(hl7132);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = hl7132_input_current_limit(hl7132);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* return the output current - uA unit */
rc = hl7132_get_iin(hl7132, &val->intval);
if (rc < 0)
dev_err(hl7132->dev, "Invalid IIN ADC (%d)\n", rc);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
mutex_lock(&hl7132->lock);
intval = hl7132_read_adc(hl7132, ADCCH_VOUT);
mutex_unlock(&hl7132->lock);
if (intval < 0)
return intval;
val->intval = intval;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
mutex_lock(&hl7132->lock);
intval = hl7132_read_adc(hl7132, ADCCH_VBAT);
mutex_unlock(&hl7132->lock);
if (intval < 0)
return intval;
val->intval = intval;
break;
/* TODO: read NTC temperature? */
case POWER_SUPPLY_PROP_TEMP:
mutex_lock(&hl7132->lock);
val->intval = hl7132_read_adc(hl7132, ADCCH_TDIE);
mutex_unlock(&hl7132->lock);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = hl7132_get_charge_type(hl7132);
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = hl7132_get_status(hl7132);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = hl7132_input_current_limit(hl7132);
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 hl7132_mains_properties[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
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_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_STATUS,
};
static int hl7132_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:
return 1;
default:
break;
}
return 0;
}
static int hl7132_gbms_mains_set_property(struct power_supply *psy,
enum gbms_property prop,
const union gbms_propval *val)
{
struct hl7132_charger *hl7132 = power_supply_get_drvdata(psy);
int ret = 0;
dev_dbg(hl7132->dev, "%s: prop=%d, val=%d\n", __func__, prop,
val->prop.intval);
if (!hl7132->init_done)
return -EAGAIN;
switch (prop) {
case GBMS_PROP_CHARGING_ENABLED:
dev_dbg(hl7132->dev, "%s: ChargeEnable %d, chg_state:%d\n",
__func__, val->prop.intval, hl7132->charging_state);
ret = hl7132_set_charging_enabled(hl7132, val->prop.intval);
break;
case GBMS_PROP_CHARGE_DISABLE:
dev_dbg(hl7132->dev, "%s: ChargeDisable %d, chg_state:%d\n",
__func__, val->prop.intval, hl7132->charging_state);
if (val->prop.intval) {
if (hl7132->charging_state == DC_STATE_ERROR)
hl7132->charging_state = DC_STATE_NO_CHARGING;
hl7132_vote_dc_avail(hl7132, 1, 1);
}
break;
default:
dev_dbg(hl7132->dev,
"%s: route to hl7132_mains_set_property, psp:%d\n",
__func__, prop);
return -ENODATA;
}
dev_dbg(hl7132->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int hl7132_gbms_mains_get_property(struct power_supply *psy,
enum gbms_property prop,
union gbms_propval *val)
{
struct hl7132_charger *hl7132 = power_supply_get_drvdata(psy);
union gbms_charger_state chg_state;
int ret = 0;
dev_dbg(hl7132->dev, "%s: prop=%d, val=%d\n", __func__, prop,
val->prop.intval);
if (!hl7132->init_done)
return -EAGAIN;
switch (prop) {
case GBMS_PROP_CHARGE_DISABLE:
ret = hl7132_get_charging_enabled(hl7132);
if (ret < 0)
return ret;
val->prop.intval = !ret;
break;
case GBMS_PROP_CHARGING_ENABLED:
ret = hl7132_get_charging_enabled(hl7132);
if (ret < 0)
return ret;
val->prop.intval = ret;
break;
case GBMS_PROP_CHARGE_CHARGER_STATE:
ret = hl7132_get_chg_chgr_state(hl7132, &chg_state);
if (ret < 0)
return ret;
val->int64val = chg_state.v;
break;
default:
dev_dbg(hl7132->dev,
"%s: route to hl7132_mains_get_property, psp:%d\n",
__func__, prop);
return -ENODATA;
}
return 0;
}
static int hl7132_gbms_mains_is_writeable(struct power_supply *psy,
enum gbms_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_CHARGING_ENABLED:
case GBMS_PROP_CHARGE_DISABLE:
return 1;
default:
break;
}
return 0;
}
static bool hl7132_is_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case HL7132_REG_DEVICE_ID ... HL7132_REG_ADC_TDIE_1:
return true;
default:
break;
}
return false;
}
static struct regmap_config hl7132_regmap = {
.name = "dc-mains",
.reg_bits = 8,
.val_bits = 8,
.max_register = HL7132_MAX_REGISTER,
.readable_reg = hl7132_is_reg,
.volatile_reg = hl7132_is_reg,
};
static struct gbms_desc hl7132_mains_desc = {
.psy_dsc.name = "hl7132-mains",
/* b/179246019 will not look online to Android */
.psy_dsc.type = POWER_SUPPLY_TYPE_UNKNOWN,
.psy_dsc.get_property = hl7132_mains_get_property,
.psy_dsc.set_property = hl7132_mains_set_property,
.psy_dsc.property_is_writeable = hl7132_mains_is_writeable,
.get_property = hl7132_gbms_mains_get_property,
.set_property = hl7132_gbms_mains_set_property,
.property_is_writeable = hl7132_gbms_mains_is_writeable,
.psy_dsc.properties = hl7132_mains_properties,
.psy_dsc.num_properties = ARRAY_SIZE(hl7132_mains_properties),
.forward = true,
};
#if defined(CONFIG_OF)
static int of_hl7132_dt(struct device *dev,
struct hl7132_platform_data *pdata)
{
struct device_node *np_hl7132 = dev->of_node;
int ret;
if (!np_hl7132)
return -EINVAL;
/* irq gpio */
pdata->irq_gpio = of_get_named_gpio(np_hl7132, "hl7132,irq-gpio", 0);
dev_info(dev, "%s: irq-gpio: %d\n", __func__, pdata->irq_gpio);
/* input current limit */
ret = of_property_read_u32(np_hl7132, "hl7132,input-current-limit",
&pdata->iin_cfg_max);
if (ret) {
dev_warn(dev, "%s: hl7132,input-current-limit is Empty\n",
__func__);
pdata->iin_cfg_max = HL7132_IIN_CFG_DFT;
}
pdata->iin_cfg = pdata->iin_cfg_max;
dev_info(dev, "%s: hl7132,iin_cfg is %u\n", __func__, pdata->iin_cfg);
/* TA max voltage limit */
ret = of_property_read_u32(np_hl7132, "hl7132,ta-max-vol",
&pdata->ta_max_vol);
if (ret) {
dev_warn(dev, "%s: hl7132,ta-max-vol is Empty\n",
__func__);
pdata->ta_max_vol = HL7132_TA_MAX_VOL;
}
ret = of_property_read_u32(np_hl7132, "hl7132,ta-max-vol-cp",
&pdata->ta_max_vol_cp);
if (ret) {
dev_warn(dev, "%s: hl7132,ta-max-vol-cp is Empty\n",
__func__);
pdata->ta_max_vol_cp = pdata->ta_max_vol;
}
/* charging float voltage */
ret = of_property_read_u32(np_hl7132, "hl7132,vbat_reg-voltage",
&pdata->vbat_reg_dt);
if (ret) {
dev_warn(dev, "%s: hl7132,vbat_reg-voltage is Empty\n",
__func__);
pdata->vbat_reg_dt = HL7132_VBAT_REG_DFT;
}
pdata->vbat_reg = pdata->vbat_reg_dt;
dev_info(dev, "%s: hl7132,vbat_reg is %u\n", __func__, pdata->vbat_reg);
/* input topoff current */
ret = of_property_read_u32(np_hl7132, "hl7132,input-itopoff",
&pdata->iin_topoff);
if (ret) {
dev_warn(dev, "%s: hl7132,input-itopoff is Empty\n",
__func__);
pdata->iin_topoff = HL7132_IIN_DONE_DFT;
}
dev_info(dev, "%s: hl7132,iin_topoff is %u\n", __func__,
pdata->iin_topoff);
/* switching frequency */
ret = of_property_read_u32(np_hl7132, "hl7132,switching-frequency",
&pdata->fsw_cfg);
if (ret) {
dev_warn(dev, "%s: hl7132,switching frequency is Empty\n",
__func__);
pdata->fsw_cfg = HL7132_FSW_CFG_DFT;
}
dev_info(dev, "%s: hl7132,fsw_cfg is %u\n", __func__, pdata->fsw_cfg);
/* NTC threshold voltage */
ret = of_property_read_u32(np_hl7132, "hl7132,ntc-threshold",
&pdata->ntc_th);
if (ret) {
pr_warn("%s: hl7132,ntc threshold voltage is Empty\n",
__func__);
pdata->ntc_th = HL7132_NTC_TH_DFT;
}
dev_info(dev, "%s: hl7132,ntc_th is %u\n", __func__, pdata->ntc_th);
/* iin offsets */
ret = of_property_read_u32(np_hl7132, "hl7132,iin-max-offset",
&pdata->iin_max_offset);
if (ret)
pdata->iin_max_offset = HL7132_IIN_MAX_OFFSET;
dev_info(dev, "%s: hl7132,iin_max_offset is %u\n", __func__,
pdata->iin_max_offset);
ret = of_property_read_u32(np_hl7132, "hl7132,iin-cc_comp-offset",
&pdata->iin_cc_comp_offset);
if (ret)
pdata->iin_cc_comp_offset = HL7132_IIN_CC_COMP_OFFSET;
dev_info(dev, "%s: hl7132,iin_cc_comp_offset is %u\n", __func__,
pdata->iin_cc_comp_offset);
ret = of_property_read_u32(np_hl7132, "hl7132,ta-vol-offset",
&pdata->ta_vol_offset);
if (ret)
pdata->ta_vol_offset = HL7132_TA_VOL_PRE_OFFSET;
dev_info(dev, "%s: hl7132,ta-vol-offset is %u\n", __func__,
pdata->ta_vol_offset);
#if IS_ENABLED(CONFIG_THERMAL)
/* USBC thermal zone */
ret = of_property_read_string(np_hl7132, "google,usb-port-tz-name",
&pdata->usb_tz_name);
if (ret) {
dev_info(dev, "%s: google,usb-port-tz-name is Empty\n",
__func__);
pdata->usb_tz_name = NULL;
} else {
dev_info(dev, "%s: google,usb-port-tz-name is %s\n", __func__,
pdata->usb_tz_name);
}
#endif
ret = of_property_read_u32(np_hl7132, "hl7132,max-init-retry",
&pdata->max_init_retry);
if (ret)
pdata->max_init_retry = HL7132_MAX_RETRY_CNT;
dev_info(dev, "%s: hl7132,max-init-retry is %u\n", __func__,
pdata->max_init_retry);
return 0;
}
#else
static int of_hl7132_dt(struct device *dev,
struct hl7132_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
#ifdef CONFIG_THERMAL
static int hl7132_usb_tz_read_temp(struct thermal_zone_device *tzd, int *temp)
{
struct hl7132_charger *hl7132 = tzd->devdata;
if (!hl7132)
return -ENODEV;
*temp = hl7132_read_adc(hl7132, ADCCH_TDIE);
return 0;
}
static struct thermal_zone_device_ops hl7132_usb_tzd_ops = {
.get_temp = hl7132_usb_tz_read_temp,
};
#endif
static int read_reg(void *data, u64 *val)
{
struct hl7132_charger *chip = data;
int rc;
unsigned int temp;
rc = regmap_read(chip->regmap, chip->debug_address, &temp);
if (rc) {
dev_err(chip->dev, "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 hl7132_charger *chip = data;
int rc;
u8 temp;
temp = (u8) val;
rc = regmap_write(chip->regmap, chip->debug_address, temp);
if (rc) {
dev_err(chip->dev, "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 hl7132_charger *chip = data;
int ret;
ret = hl7132_set_new_cc_max(chip, chip->cc_max);
dev_info(chip->dev,
"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_soft_reset_1(void *data, u64 val)
{
int ret, reg_value;
struct hl7132_charger *hl7132 = data;
dev_info(hl7132->dev,
"%s: Triggering soft reset then sleeping %llu ms before 1 read\n",
__func__, val);
regmap_write(hl7132->regmap, HL7132_REG_CTRL_2, 0xC0);
/* regmap_update_bits will always report a failure after soft reset,
* so confirm that it succeeded by making sure HL7132_REG_CTRL_2 is back
* to default after waiting for soft reset to complete - chip holds I2C
* BUS for ~6ms after reset is triggered. Wait 100ms as per HW
* integration guide.
*/
msleep(val);
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_2, &reg_value);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read after soft reset\n",
__func__);
return ret;
}
if (reg_value != HL7132_CTRL_2_DFT) {
dev_err(hl7132->dev, "%s: Failed to perform soft reset\n",
__func__);
return ret;
}
dev_info(hl7132->dev, "%s: Soft reset complete\n", __func__);
return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(soft_reset_1_debug_ops, NULL, debug_soft_reset_1, "0x%02llx\n");
static int debug_soft_reset_2(void *data, u64 val)
{
int ret, reg_value;
struct hl7132_charger *hl7132 = data;
dev_info(hl7132->dev,
"%s: Triggering soft reset then sleeping %llu ms before 2 reads\n",
__func__, val);
regmap_write(hl7132->regmap, HL7132_REG_CTRL_2, 0xC0);
/* regmap_update_bits will always report a failure after soft reset,
* so confirm that it succeeded by making sure HL7132_REG_CTRL_2 is back
* to default after waiting for soft reset to complete - chip holds I2C
* BUS for ~6ms after reset is triggered. Wait 100ms as per HW
* integration guide.
*/
msleep(val);
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_2, &reg_value);
msleep(20);
ret = regmap_read(hl7132->regmap, HL7132_REG_CTRL_2, &reg_value);
if (ret < 0) {
dev_err(hl7132->dev, "%s: Failed to read after soft reset\n",
__func__);
return ret;
}
if (reg_value != HL7132_CTRL_2_DFT) {
dev_err(hl7132->dev, "%s: Failed to perform soft reset\n",
__func__);
return ret;
}
dev_info(hl7132->dev, "%s: Soft reset complete\n", __func__);
return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(soft_reset_2_debug_ops, NULL, debug_soft_reset_2, "0x%02llx\n");
static int debug_adc_chan_get(void *data, u64 *val)
{
struct hl7132_charger *hl7132 = data;
*val = hl7132_read_adc(data, hl7132->debug_adc_channel);
return 0;
}
static int debug_adc_chan_set(void *data, u64 val)
{
struct hl7132_charger *hl7132 = data;
if (val < ADCCH_VIN || val >= ADCCH_MAX)
return -EINVAL;
hl7132->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_ftm_mode_get(void *data, u64 *val)
{
struct hl7132_charger *hl7132 = data;
*val = hl7132->ftm_mode;
return 0;
}
static int debug_ftm_mode_set(void *data, u64 val)
{
struct hl7132_charger *hl7132 = data;
if (val) {
hl7132->ftm_mode = true;
hl7132->ta_type = TA_TYPE_USBPD;
hl7132->chg_mode = CHG_2TO1_DC_MODE;
} else {
hl7132->ftm_mode = false;
}
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_ftm_mode_ops, debug_ftm_mode_get, debug_ftm_mode_set, "%llu\n");
static int debug_pps_index_get(void *data, u64 *val)
{
struct hl7132_charger *hl7132 = data;
*val = hl7132->pps_index;
return 0;
}
static int debug_pps_index_set(void *data, u64 val)
{
struct hl7132_charger *hl7132 = data;
return hl7132_set_charging_enabled(hl7132, (int)val);
}
DEFINE_SIMPLE_ATTRIBUTE(debug_pps_index_ops, debug_pps_index_get,
debug_pps_index_set, "%llu\n");
static int debug_ta_max_vol_set(void *data, u64 val)
{
struct hl7132_charger *hl7132 = data;
hl7132->pdata->ta_max_vol = val;
hl7132->pdata->ta_max_vol_cp = val;
hl7132->ta_max_vol = val * hl7132->chg_mode;
return 0;
}
static int debug_ta_max_vol_get(void *data, u64 *val)
{
struct hl7132_charger *hl7132 = data;
*val = hl7132->pdata->ta_max_vol;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_ta_max_vol_ops, debug_ta_max_vol_get,
debug_ta_max_vol_set, "%llu\n");
static ssize_t sts_ab_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct hl7132_charger *hl7132 = dev_get_drvdata(dev);
u8 tmp[2];
int ret;
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_INT_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_RO(sts_ab);
static ssize_t chg_stats_show(struct device *dev, struct device_attribute *attr,
char *buff)
{
struct i2c_client *client = to_i2c_client(dev);
struct hl7132_charger *hl7132 = i2c_get_clientdata(client);
struct hl7132_chg_stats *chg_data = &hl7132->chg_data;
const int max_size = PAGE_SIZE;
int len = -ENODATA;
mutex_lock(&hl7132->lock);
if (!hl7132_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, iin_loop=%d\n",
chg_data->ovc_count, chg_data->ovc_max_ibatt, chg_data->ovc_max_delta,
chg_data->rcp_count,
chg_data->stby_count,
chg_data->iin_loop_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(&hl7132->lock);
return len;
}
static ssize_t chg_stats_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct hl7132_charger *hl7132 = i2c_get_clientdata(client);
mutex_lock(&hl7132->lock);
hl7132_chg_stats_init(&hl7132->chg_data);
mutex_unlock(&hl7132->lock);
return count;
}
static DEVICE_ATTR_RW(chg_stats);
static ssize_t dump_reg_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hl7132_charger *hl7132 = dev_get_drvdata(dev);
u8 tmp[HL7132_MAX_REGISTER + 1];
int ret, i;
int len = 0;
ret = regmap_bulk_read(hl7132->regmap, HL7132_REG_DEVICE_ID, &tmp,
HL7132_MAX_REGISTER + 1);
if (ret < 0)
return ret;
for (i = 0; i <= HL7132_MAX_REGISTER; i++)
len += scnprintf(&buf[len], PAGE_SIZE - len, "%02x: %02x\n", i, tmp[i]);
return len;
}
static DEVICE_ATTR_RO(dump_reg);
static int hl7132_create_fs_entries(struct hl7132_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_dump_reg);
chip->debug_root = debugfs_create_dir("charger-hl7132", NULL);
if (IS_ERR_OR_NULL(chip->debug_root)) {
dev_err(chip->dev, "Couldn't create debug dir\n");
return -ENOENT;
}
debugfs_create_u32("debug_level", 0644, chip->debug_root,
&debug_printk_prlog);
debugfs_create_u32("no_logbuffer", 0644, chip->debug_root,
&debug_no_logbuffer);
// TODO testing
debugfs_create_u32("init_sleep", 0644, chip->debug_root,
&chip->pdata->init_sleep);
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);
// TODO testing
debugfs_create_file("soft_reset1", 0644, chip->debug_root, chip,
&soft_reset_1_debug_ops);
debugfs_create_file("soft_reset2", 0644, chip->debug_root, chip,
&soft_reset_2_debug_ops);
debugfs_create_file("ta_vol_max", 0644, chip->debug_root, chip,
&debug_ta_max_vol_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_file("ftm_mode", 0644, chip->debug_root, chip,
&debug_ftm_mode_ops);
return 0;
}
static int hl7132_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
static char *battery[] = { "hl7132-battery" };
struct power_supply_config mains_cfg = {};
struct hl7132_platform_data *pdata;
struct hl7132_charger *hl7132_chg;
struct device *dev = &client->dev;
const char *psy_name = NULL;
int ret;
dev_info(dev, "starting hl7132 probe\n");
hl7132_chg = devm_kzalloc(dev, sizeof(*hl7132_chg), GFP_KERNEL);
if (!hl7132_chg)
return -ENOMEM;
#if defined(CONFIG_OF)
if (client->dev.of_node) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct hl7132_platform_data),
GFP_KERNEL);
if (!pdata) {
dev_err(dev, "Failed to allocate memory\n");
return -ENOMEM;
}
ret = of_hl7132_dt(dev, pdata);
if (ret < 0) {
dev_err(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, hl7132_chg);
mutex_init(&hl7132_chg->lock);
hl7132_chg->dev = &client->dev;
hl7132_chg->pdata = pdata;
hl7132_chg->charging_state = DC_STATE_NO_CHARGING;
/* Create a work queue for the direct charger */
hl7132_chg->dc_wq = alloc_ordered_workqueue("hl7132_dc_wq", WQ_MEM_RECLAIM);
if (hl7132_chg->dc_wq == NULL) {
dev_err(dev, "failed to create work queue\n");
return -ENOMEM;
}
hl7132_chg->monitor_wake_lock =
wakeup_source_register(NULL, "hl7132-charger-monitor");
if (!hl7132_chg->monitor_wake_lock) {
dev_err(dev, "Failed to register wakeup source\n");
return -ENODEV;
}
/* initialize work */
INIT_DELAYED_WORK(&hl7132_chg->timer_work, hl7132_timer_work);
hl7132_chg->timer_id = TIMER_ID_NONE;
hl7132_chg->timer_period = 0;
INIT_DELAYED_WORK(&hl7132_chg->pps_work, hl7132_pps_request_work);
ret = of_property_read_string(dev->of_node,
"hl7132,psy_name", &psy_name);
if ((ret == 0) && (strlen(psy_name) > 0))
hl7132_regmap.name = hl7132_mains_desc.psy_dsc.name =
devm_kstrdup(dev, psy_name, GFP_KERNEL);
hl7132_chg->regmap = devm_regmap_init_i2c(client, &hl7132_regmap);
if (IS_ERR(hl7132_chg->regmap)) {
ret = -EINVAL;
dev_err(dev, "regmap init failed, err = %d\n", ret);
goto error;
}
ret = hl7132_probe_pps(hl7132_chg);
if (ret < 0) {
dev_warn(hl7132_chg->dev, "hl7132: PPS not available (%d)\n",
ret);
} else {
const char *logname = "pca9468"; /* TODO b/360866957*/
hl7132_chg->log = logbuffer_register(logname);
if (IS_ERR(hl7132_chg->log)) {
dev_err(hl7132_chg->dev, "%s: no logbuffer (%ld)\n",
__func__, PTR_ERR(hl7132_chg->log));
hl7132_chg->log = NULL;
}
}
// TODO testing
pdata->init_sleep = 1000;
ret = hl7132_hw_ping(hl7132_chg);
if (ret)
goto error;
/* TODO: only enable ADC if usb_tz_name is defined */
hl7132_chg->hw_init_done = false;
ret = hl7132_hw_init(hl7132_chg);
if (ret == 0)
hl7132_chg->hw_init_done = true;
else
goto error;
mains_cfg.supplied_to = battery;
mains_cfg.num_supplicants = ARRAY_SIZE(battery);
mains_cfg.drv_data = hl7132_chg;
hl7132_chg->mains = devm_power_supply_register(dev,
&hl7132_mains_desc.psy_dsc,
&mains_cfg);
if (IS_ERR(hl7132_chg->mains)) {
ret = -ENODEV;
goto error;
}
/* Interrupt pin is optional. */
if (pdata->irq_gpio >= 0) {
ret = hl7132_irq_init(hl7132_chg, client);
if (ret < 0)
dev_warn(dev, "failed to initialize IRQ: %d\n", ret);
}
ret = hl7132_create_fs_entries(hl7132_chg);
if (ret < 0)
dev_err(dev, "error while registering debugfs %d\n", ret);
#if IS_ENABLED(CONFIG_THERMAL)
if (pdata->usb_tz_name) {
hl7132_chg->usb_tzd =
thermal_zone_device_register(pdata->usb_tz_name, 0, 0,
hl7132_chg,
&hl7132_usb_tzd_ops,
NULL, 0, 0);
if (IS_ERR(hl7132_chg->usb_tzd)) {
hl7132_chg->usb_tzd = NULL;
ret = PTR_ERR(hl7132_chg->usb_tzd);
dev_err(dev,
"Couldn't register usb connector thermal zone ret=%d\n",
ret);
}
}
#endif
hl7132_chg->dc_avail = NULL;
hl7132_chg->init_done = true;
dev_info(dev, "hl7132: probe_done\n");
dev_dbg(dev, "%s: =========END=========\n", __func__);
return 0;
error:
destroy_workqueue(hl7132_chg->dc_wq);
debugfs_remove(hl7132_chg->debug_root);
if (hl7132_chg->log)
logbuffer_unregister(hl7132_chg->log);
mutex_destroy(&hl7132_chg->lock);
wakeup_source_unregister(hl7132_chg->monitor_wake_lock);
return ret;
}
static void hl7132_remove(struct i2c_client *client)
{
struct hl7132_charger *hl7132_chg = i2c_get_clientdata(client);
/* stop charging if it is active */
hl7132_stop_charging(hl7132_chg);
destroy_workqueue(hl7132_chg->dc_wq);
debugfs_remove(hl7132_chg->debug_root);
mutex_destroy(&hl7132_chg->lock);
wakeup_source_unregister(hl7132_chg->monitor_wake_lock);
if (client->irq) {
free_irq(client->irq, hl7132_chg);
gpio_free(hl7132_chg->pdata->irq_gpio);
}
#if IS_ENABLED(CONFIG_THERMAL)
if (hl7132_chg->usb_tzd)
thermal_zone_device_unregister(hl7132_chg->usb_tzd);
#endif
if (hl7132_chg->log)
logbuffer_unregister(hl7132_chg->log);
pps_free(&hl7132_chg->pps_data);
}
static const struct i2c_device_id hl7132_id[] = {
{ "hl7132", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, hl7132_id);
#if defined(CONFIG_OF)
static struct of_device_id hl7132_i2c_dt_ids[] = {
{ .compatible = "hl,hl7132" },
{ },
};
MODULE_DEVICE_TABLE(of, hl7132_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
hl7132_check_and_update_charging_timer(struct hl7132_charger *hl7132)
{
unsigned long current_time = 0, next_update_time, time_left;
get_current_time(&current_time);
if (hl7132->timer_id != TIMER_ID_NONE) {
next_update_time = hl7132->last_update_time +
(hl7132->timer_period / 1000); /* seconds */
dev_dbg(hl7132->dev,
"%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(&hl7132->lock);
hl7132->timer_period = time_left * 1000; /* ms unit */
mutex_unlock(&hl7132->lock);
schedule_delayed_work(&hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
dev_dbg(hl7132->dev, "%s: timer_id=%d, time_period=%ld\n",
__func__, hl7132->timer_id, hl7132->timer_period);
}
hl7132->last_update_time = current_time;
}
#endif
static int hl7132_suspend(struct device *dev)
{
struct hl7132_charger *hl7132 = dev_get_drvdata(dev);
dev_dbg(hl7132->dev, "%s: cancel delayed work\n", __func__);
/* cancel delayed_work */
cancel_delayed_work(&hl7132->timer_work);
return 0;
}
static int hl7132_resume(struct device *dev)
{
struct hl7132_charger *hl7132 = dev_get_drvdata(dev);
dev_dbg(hl7132->dev, "%s: update_timer\n", __func__);
/* Update the current timer */
#ifdef CONFIG_RTC_HCTOSYS
hl7132_check_and_update_charging_timer(hl7132);
#else
if (hl7132->timer_id != TIMER_ID_NONE) {
mutex_lock(&hl7132->lock);
hl7132->timer_period = 0; /* ms unit */
mutex_unlock(&hl7132->lock);
schedule_delayed_work(&hl7132->timer_work,
msecs_to_jiffies(hl7132->timer_period));
}
#endif
return 0;
}
#else
#define hl7132_suspend NULL
#define hl7132_resume NULL
#endif
const struct dev_pm_ops hl7132_pm_ops = {
.suspend = hl7132_suspend,
.resume = hl7132_resume,
};
static struct i2c_driver hl7132_driver = {
.driver = {
.name = "hl7132",
#if defined(CONFIG_OF)
.of_match_table = hl7132_i2c_dt_ids,
#endif /* CONFIG_OF */
#if defined(CONFIG_PM)
.pm = &hl7132_pm_ops,
#endif
},
.probe = hl7132_probe,
.remove = hl7132_remove,
.id_table = hl7132_id,
};
module_i2c_driver(hl7132_driver);
MODULE_AUTHOR("Baltazar Ortiz <[email protected]>");
MODULE_DESCRIPTION("HL7132 gcharger driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("3.7.0");