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android / kernel / google-modules / bms / refs/tags/android-14.0.0_r0.67 / . / ln8411_driver.c
blob: a14bfb2dd068949fd718e21726c10e799a0ebcc5 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for LN8411 Direct charger
* Based on existing PCA9468 driver
*/
#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 "ln8411_regs.h"
#include "ln8411_charger.h"
#if IS_ENABLED(CONFIG_OF)
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#endif /* CONFIG_OF */
#define POLL_ADC
/* Timer definition */
#define LN8411_VBATMIN_CHECK_T 1000 /* 1000ms */
#define LN8411_CCMODE_CHECK1_T 5000 /* 10000ms -> 500ms */
#define LN8411_CCMODE_CHECK2_T 5000 /* 5000ms */
#define LN8411_CVMODE_CHECK_T 10000 /* 10000ms */
#define LN8411_ENABLE_DELAY_T 250 /* 250ms */
#define LN8411_CVMODE_CHECK2_T 1000 /* 1000ms */
#define LN8411_ENABLE_WLC_DELAY_T 300 /* 300ms */
/* Battery Threshold */
#define LN8411_DC_VBAT_MIN 3400000 /* uV */
/* Input Current Limit default value */
#define LN8411_IIN_CFG_DFT 2500000 /* uA*/
/* Charging Float Voltage default value */
#define LN8411_VFLOAT_DFT 4350000 /* uV */
/* Charging Float Voltage max voltage for comp */
#define LN8411_COMP_VFLOAT_MAX 4700000 /* uV */
/* Charging Done Condition */
#define LN8411_IIN_DONE_DFT 500000 /* uA */
/* Maximum TA voltage threshold */
#define LN8411_TA_MAX_VOL 10250000 /* uV */
#define LN8411_TA_MAX_VOL_2_1 10250000 /* UV */
/* Maximum TA current threshold, set to max(cc_max) / 2 */
#define LN8411_TA_MAX_CUR 2600000 /* uA */
#define LN8411_TA_MAX_CUR_4_1 2250000 /* uA */
/* Minimum TA current threshold */
#define LN8411_TA_MIN_CUR 1000000 /* uA - PPS minimum current */
/* Minimum TA voltage threshold in Preset mode */
#define LN8411_TA_MIN_VOL_PRESET 8000000 /* uV */
#define LN8411_TA_VOL_PRE_OFFSET 500000 /* uV */
#define LN8411_WLC_VOL_PRE_OFFSET 700000 /* uV */
/* Adjust CC mode TA voltage step */
#define LN8411_TA_VOL_STEP_ADJ_CC 40000 /* uV */
/* Pre CV mode TA voltage step */
#define LN8411_TA_VOL_STEP_PRE_CV 20000 /* uV */
/* IIN_CC adc offset for accuracy */
#define LN8411_IIN_ADC_OFFSET 20000 /* uA */
/* IIN_CC compensation offset */
#define LN8411_IIN_CC_COMP_OFFSET 25000 /* uA */
/* IIN_CC compensation offset in Power Limit Mode(Constant Power) TA */
#define LN8411_IIN_CC_COMP_OFFSET_CP 20000 /* uA */
/* TA maximum voltage that can support CC in Constant Power Mode */
#define LN8411_TA_MAX_VOL_CP 10250000
/* Offset for cc_max / 2 */
#define LN8411_IIN_MAX_OFFSET 25000 /* uA */
/* Offset for TA max current */
#define LN8411_TA_CUR_MAX_OFFSET 200000 /* uA */
/* maximum retry counter for restarting charging */
#define LN8411_MAX_RETRY_CNT 3 /* retries */
/* TA IIN tolerance */
#define LN8411_TA_IIN_OFFSET 100000 /* uA */
/* PD Message Voltage and Current Step */
#define PD_MSG_TA_VOL_STEP 20000 /* uV */
#define PD_MSG_TA_CUR_STEP 50000 /* uA */
/* Maximum WCRX voltage threshold */
#define LN8411_WCRX_MAX_VOL 9750000 /* uV */
/* WCRX voltage Step */
#define WCRX_VOL_STEP 40000 /* uV */
/* Default value for protections */
#define VBAT_REV_UVP_DFT 3500000 /* 3.5V */
#define VBAT_UVP_DFT 3400000 /* 3.4V */
#define VBAT_OVP_WARN_DFT 4450000 /* 4.45V */
#define VBAT_OVP_DFT 4525000 /* 4.525V */
#define SWCAP_OVP_DFT 750000 /* 0.75V */
#define SWCAP_UVP_DFT 0 /* 0V */
#define CBAT_OCP_WARN_DFT 8000000 /* 8A */
#define CBAT_OCP_DFT 8200000 /* 8.2A */
#define CBUS_OCP_WARN_DFT 2500000 /* 2.5A */
#define IBUS_OCP_DFT_4_1 0xE /* 2.3A */
#define IBUS_OCP_DFT_2_1 0x4 /* 3.5A */
#define IBUS_OCP_DFT_1_2 0x5 /* 1.4A */
#define VUSB_OVP_DFT_4_1 0x8b /* 22V */
#define VUSB_OVP_DFT_2_1 0x81 /* 12V */
#define IBUS_UCP_DFT_4_1 0x10
#define IBUS_UCP_DFT_1_2 0x90
#define PMID2OUT_UVP_DFT_4_1 0x4 /* 10% */
#define PMID2OUT_UVP_DFT_1_2 0x84 /* Disable */
#define PMID2OUT_UVP_DFT_EN_1_2 0x4
#define CFG_10_DFT_4_1 0x1
#define CFG_10_DFT_2_1 0x0
#define PMID2OUT_UVP 0x84 /* 10% */
#define PMID_SWITCH_OK_DIS 0x78
#define LN8411_INFET_OFF_DET_DIS 0x7D
#define VBAT_ALARM_CFG_DELTA 50000 /* 50mV */
#define IBUS_ALARM_CFG_DELTA 200000 /* 200mA */
#define ADC_EN_RETRIES 400
#define LN8411_TIER_SWITCH_DELTA 25000 /* uV */
/* GPIO support for 1_2 mode */
#define LN8411_NUM_GPIOS 1
#define LN8411_MIN_GPIO 0
#define LN8411_MAX_GPIO 0
#define LN8411_GPIO_1_2_EN 0
/* Status */
enum sts_mode_t {
STS_MODE_CHG_LOOP, /* TODO: There is no such thing */
STS_MODE_VFLT_LOOP,
STS_MODE_IIN_LOOP,
STS_MODE_LOOP_INACTIVE,
STS_MODE_CHG_DONE,
STS_MODE_VIN_UVLO,
};
/* Timer ID */
enum timer_id_t {
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 ta_inc_t {
INC_NONE, /* No increment */
INC_TA_VOL, /* TA voltage increment */
INC_TA_CUR, /* TA current increment */
};
/* BATT info Type */
enum batt_info_t {
BATT_CURRENT,
BATT_VOLTAGE,
};
/* Reg, val, mask (if update) */
static u8 mode_settings[3][8][3] = {
/* 2 to 1 */
{
{LN8411_VUSB_OVP, VUSB_OVP_DFT_2_1, 0xcf},
{LN8411_VWPC_OVP, VUSB_OVP_DFT_2_1, 0xcf},
{LN8411_CFG_10, CFG_10_DFT_2_1, 0x1},
{LN8411_IBUS_OCP, IBUS_OCP_DFT_2_1, 0x0},
{LN8411_IBUS_UCP, IBUS_UCP_DFT_4_1, 0x0},
{LN8411_PMID2OUT_UVP, PMID2OUT_UVP_DFT_4_1, 0x9f},
{0x0, 0x0, 0x0},
{0x0, 0x0, 0x0},
},
/* 4 to 1 */
{
{LN8411_VUSB_OVP, VUSB_OVP_DFT_4_1, 0xcf},
{LN8411_VWPC_OVP, VUSB_OVP_DFT_4_1, 0xcf},
{LN8411_CFG_10, CFG_10_DFT_4_1, 0x1},
{LN8411_IBUS_OCP, IBUS_OCP_DFT_4_1, 0x0},
{LN8411_IBUS_UCP, IBUS_UCP_DFT_4_1, 0x0},
{LN8411_PMID2OUT_UVP, PMID2OUT_UVP_DFT_4_1, 0x9f},
{0x0, 0x0, 0x0},
{0x0, 0x0, 0x0},
},
/* 1 to 2 */
{
{LN8411_VWPC_OVP, VUSB_OVP_DFT_2_1, 0xcf},
{LN8411_CFG_10, CFG_10_DFT_4_1, 0x1},
{LN8411_IBUS_OCP, IBUS_OCP_DFT_1_2, 0x0},
{LN8411_PMID2OUT_UVP, PMID2OUT_UVP_DFT_1_2, 0x9f},
{LN8411_IBUS_UCP, IBUS_UCP_DFT_1_2, 0x0},
{LN8411_LION_COMP_CTRL_1, PMID_SWITCH_OK_DIS, 0x0},
{LN8411_LION_COMP_CTRL_2, LN8411_VWPC_UVP_DIS, 0x0},
{LN8411_LION_COMP_CTRL_4, LN8411_INFET_OFF_DET_DIS, 0x0},
},
};
static int ln8411_hw_init(struct ln8411_charger *ln8411);
static int ln8411_irq_init(struct ln8411_charger *ln8411);
static int ln8411_start_1_2_mode(struct ln8411_charger *ln8411);
static int ln8411_stop_1_2_mode(struct ln8411_charger *ln8411);
static inline int conv_chg_mode(const struct ln8411_charger *ln8411, int val)
{
return (ln8411->chg_mode == CHG_2TO1_DC_MODE) ? val * 2 : val * 4;
}
int get_chip_info(struct ln8411_charger *chg)
{
unsigned int val;
int err = regmap_read(chg->regmap, LN8411_DEVICE_ID, &val);
if (err) {
dev_err(chg->dev, "Error reading DEVICE_ID (%d)\n", err);
return err;
}
chg->chip_info.device_id = val;
err = regmap_read(chg->regmap, LN8411_BC_STS_C, &val);
if (err) {
dev_err(chg->dev, "Error reading CHIP_REV (%d)\n", err);
return err;
}
chg->chip_info.chip_rev = (val & LN8411_CHIP_REV_MASK) >> LN8411_CHIP_REV_SHIFT;
dev_info(chg->dev, "DeviceID: %02X, Chip Rev: %02X\n", chg->chip_info.device_id,
chg->chip_info.chip_rev);
return 0;
}
static ssize_t chip_info_show(struct device *dev, struct device_attribute *attr, char *buf)
{
int ret;
struct ln8411_charger *chg = dev_get_drvdata(dev);
ret = get_chip_info(chg);
if (ret) {
dev_err(dev, "Error while getting chip info\n");
return ret;
}
ret = scnprintf(buf, PAGE_SIZE, "Chip Id : %#02X, Chip Rev: %#02X\n",
chg->chip_info.device_id, chg->chip_info.chip_rev);
return ret;
}
static DEVICE_ATTR_RO(chip_info);
static struct attribute *ln8411_attr_group[] = {
&dev_attr_chip_info.attr,
NULL
};
static int dump_all_regs(struct ln8411_charger *ln8411)
{
u8 tmp[0x9c - LN8411_DEVICE_ID + 1];
int i;
int ret, bc_reg, bd_reg, be_reg;
int adc_val;
adc_val = ln8411_read_adc(ln8411, ADCCH_VBAT);
dev_info(ln8411->dev, "VBAT ADC: %d\n", adc_val);
ret = regmap_bulk_read(ln8411->regmap, LN8411_DEVICE_ID, &tmp, sizeof(tmp));
for (i=0; i<sizeof(tmp); i++)
dev_info(ln8411->dev, "Reg %#02x = %#02x\n", i, tmp[i]);
ret = regmap_read(ln8411->regmap, 0xbc, &bc_reg);
ret = regmap_read(ln8411->regmap, 0xbd, &bd_reg);
ret = regmap_read(ln8411->regmap, 0xbe, &be_reg);
dev_info(ln8411->dev, "Reg 0xbc = %#02x, 0xbd = %#02x, 0xbe = %#02x\n", bc_reg, bd_reg, be_reg);
return ret;
}
static bool ln8411_is_reg(struct device *dev, unsigned int reg)
{
switch(reg) {
case 0x0 ... 0xbe:
return true;
default:
return false;
}
}
static struct regmap_config ln8411_regmap = {
.name = "ln8411",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xbe,
.readable_reg = ln8411_is_reg,
.volatile_reg = ln8411_is_reg,
};
static int read_reg(void *data, u64 *val)
{
struct ln8411_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 ln8411_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 %#02x to %#02x rc = %d\n",
temp, chip->debug_address, rc);
return -EAGAIN;
}
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(register_debug_ops_ln8411, read_reg, write_reg, "%#02llx\n");
static int ln8411_read_1_2_mode(void *data, u64 *val)
{
struct ln8411_charger *ln8411 = data;
*val = ln8411->chg_mode == CHG_1TO2_DC_MODE;
return 0;
}
static int ln8411_write_1_2_mode(void *data, u64 val)
{
struct ln8411_charger *ln8411 = data;
int rc;
if (val)
rc = ln8411_start_1_2_mode(ln8411);
else
rc = ln8411_stop_1_2_mode(ln8411);
if (rc) {
dev_err(ln8411->dev, "Couldn't %s 1_2 mode\n", val ? "enable" : "disable");
return -EAGAIN;
}
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(ln8411_1_2_mode_ops, ln8411_read_1_2_mode, ln8411_write_1_2_mode, "%#02llx\n");
/* ------------------------------------------------------------------------ */
static int ln8411_set_lion_ctrl(const struct ln8411_charger *ln8411, enum ln8411_keys key)
{
int ret;
ret = regmap_write(ln8411->regmap, LN8411_LION_CTRL, (unsigned int)key);
if (ret)
dev_err(ln8411->dev, "Failed to set LION_CTRL: key: %d (%d)\n", key, ret);
return ret;
}
static int __ln8411_get_adc__(struct ln8411_charger *ln8411,
const enum ln8411_adc_chan chan, u16 *val)
{
unsigned int lsb, msb, reg;
int ret;
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_SW_OVERRIDE);
if (ret) {
dev_info(ln8411->dev, "%s: Error setting EN_SW_OVERRIDE (%d)\n", __func__, ret);
goto error;
}
ret = regmap_set_bits(ln8411->regmap, LN8411_ADC_CFG_2, LN8411_PAUSE_ADC_UPDATES);
if (ret) {
dev_info(ln8411->dev, "%s: Error pausing ADC updates (%d)\n", __func__, ret);
goto error;
}
reg = (2 * chan) + LN8411_IBUS_ADC1;
ret = regmap_read(ln8411->regmap, reg, &msb);
if (ret) {
dev_info(ln8411->dev, "%s: Error reading msb reg %#02x (%d)\n", __func__, reg, ret);
goto resume_updates;
}
reg++;
ret = regmap_read(ln8411->regmap, reg, &lsb);
if (ret) {
dev_info(ln8411->dev, "%s: Error reading lsb reg %#02x (%d)\n", __func__, reg, ret);
goto resume_updates;
}
*val = (msb << LN8411_REG_BITS) | lsb;
resume_updates:
ret = regmap_clear_bits(ln8411->regmap, LN8411_ADC_CFG_2, LN8411_PAUSE_ADC_UPDATES);
if (ret) {
dev_info(ln8411->dev, "%s: Error resuming ADC updates (%d)\n", __func__, ret);
goto error;
}
error:
ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_LOCK);
return ret;
}
int ln8411_read_adc(struct ln8411_charger *ln8411,
const enum ln8411_adc_chan chan)
{
int ret, intval;
u16 val;
ret = __ln8411_get_adc__(ln8411, chan, &val);
if (ret)
return ret;
switch (chan) {
case LN8411_ADC_CHAN_IBUS:
intval = val * LN8411_IBUS_ADC_STEP_UA;
break;
case LN8411_ADC_CHAN_VBUS:
intval = val * LN8411_VBUS_ADC_STEP_UV;
break;
case LN8411_ADC_CHAN_VUSB:
intval = val * LN8411_VUSB_ADC_STEP_UV;
break;
case LN8411_ADC_CHAN_VWPC:
intval = val * LN8411_VWPC_ADC_STEP_UV;
break;
case LN8411_ADC_CHAN_VOUT:
intval = val * LN8411_VOUT_ADC_STEP_UV;
break;
case LN8411_ADC_CHAN_VBAT:
intval = val * LN8411_VBAT_ADC_STEP_UV;
break;
case LN8411_ADC_CHAN_IBAT:
intval = val * LN8411_IBAT_ADC_STEP_UA;
break;
case LN8411_ADC_CHAN_TSBAT:
intval = val;
break;
case LN8411_ADC_CHAN_TDIE:
intval = val * LN8411_TDIE_STEP_DECIC;
break;
default:
return -EINVAL;
}
dev_dbg(ln8411->dev, "%s: ADC Ch: %d = %d\n", __func__, chan, intval);
return intval;
}
static int ln8411_set_vbat_ovp(struct ln8411_charger *ln8411, int val)
{
unsigned int reg_code;
int ret;
val = clamp(val, LN8411_VBAT_OVP_MIN_UV, LN8411_VBAT_OVP_MAX_UV);
reg_code = (val - LN8411_VBAT_OVP_OFFSET_UV) / LN8411_VBAT_OVP_STEP_UV;
ret = regmap_clear_bits(ln8411->regmap, LN8411_VBAT_OVP, LN8411_VBAT_OVP_MASK);
if (ret)
return ret;
return regmap_update_bits(ln8411->regmap, LN8411_VBAT_OVP,
LN8411_VBAT_OVP_CFG_MASK, reg_code);
}
/* v float voltage (5 mV) resolution */
static int ln8411_set_vfloat(struct ln8411_charger *ln8411,
unsigned int v_float)
{
int ret = 0;
/* Temporary for A1 silicon: Use ADC */
/* ret = ln8411_set_vbat_ovp(ln8411, v_float + VBAT_ALARM_CFG_DELTA); */
ln8411->vfloat_reg = v_float;
dev_info(ln8411->dev, "%s: v_float=%u\n", __func__, v_float);
return ret;
}
static int ln8411_set_input_current(struct ln8411_charger *ln8411,
unsigned int iin)
{
int ret = 0, val;
/* round-up and increase one step */
/* iin = iin + PD_MSG_TA_CUR_STEP + IBUS_ALARM_CFG_DELTA; */
iin += PD_MSG_TA_CUR_STEP;
val = LN8411_IIN_CFG(iin);
/* Set IIN_CFG to one step higher */
val = val + 1;
/* Temporary for A1 silicon: Use ADC */
/* ret = ln8411_set_ibus_ocp(ln8411, iin); */
ln8411->iin_reg = val * LN8411_IIN_CFG_STEP;
dev_info(ln8411->dev, "%s: iin=%d (%d)\n", __func__, iin, ret);
return ret;
}
static inline bool ln8411_can_inc_ta_cur(struct ln8411_charger *ln8411)
{
return ln8411->ta_cur + PD_MSG_TA_CUR_STEP < min(ln8411->ta_max_cur,
ln8411->iin_cc + LN8411_TA_CUR_MAX_OFFSET);
}
/* Returns the enable or disable value. into 1 or 0. */
static int ln8411_get_charging_enabled(struct ln8411_charger *ln8411)
{
int ret;
unsigned int val;
ret = regmap_read(ln8411->regmap, LN8411_CTRL1, &val);
if (ret < 0)
return ret;
return (val & LN8411_CP_EN) != 0;
}
/* b/194346461 ramp down IIN */
static int ln8411_wlc_ramp_down_iin(struct ln8411_charger *ln8411,
struct power_supply *wlc_psy)
{
const int ramp_down_step = LN8411_IIN_CFG_STEP;
int ret = 0, iin;
if (!ln8411->wlc_ramp_out_iin)
return 0;
iin = ln8411_input_current_limit(ln8411);
for ( ; iin >= LN8411_IIN_CFG_MIN; iin -= ramp_down_step) {
int iin_adc, wlc_iout = -1;
iin_adc = ln8411_read_adc(ln8411, ADCCH_IIN);
if (wlc_psy) {
union power_supply_propval pro_val;
ret = power_supply_get_property(wlc_psy,
POWER_SUPPLY_PROP_ONLINE,
&pro_val);
if (ret < 0 || pro_val.intval != PPS_PSY_PROG_ONLINE)
break;
ret = power_supply_get_property(wlc_psy,
POWER_SUPPLY_PROP_CURRENT_NOW,
&pro_val);
if (ret == 0)
wlc_iout = pro_val.intval;
}
ret = ln8411_set_input_current(ln8411, iin);
if (ret < 0) {
dev_err(ln8411->dev, "%s: ramp down iin=%d (%d)\n", __func__,
iin, ret);
break;
}
dev_dbg(ln8411->dev, "%s: iin_adc=%d, wlc_iout-%d ramp down iin=%d\n",
__func__, iin_adc, wlc_iout, iin);
msleep(ln8411->wlc_ramp_out_delay);
}
return ret;
}
/* b/194346461 ramp down VOUT */
#define WLC_VOUT_CFG_STEP 40000
/* the caller will set to vbatt * 4 */
static int ln8411_wlc_ramp_down_vout(struct ln8411_charger *ln8411,
struct power_supply *wlc_psy)
{
const int ramp_down_step = WLC_VOUT_CFG_STEP;
union power_supply_propval pro_val;
int vout = 0, vout_target = ln8411->wlc_ramp_out_vout_target;
int ret, vbatt;
while (true) {
vbatt = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (vbatt <= 0) {
dev_err(ln8411->dev, "%s: invalid vbatt %d\n", __func__, vbatt);
break;
}
ret = power_supply_get_property(wlc_psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&pro_val);
if (ret < 0) {
dev_err(ln8411->dev, "%s: invalid vout %d\n", __func__, ret);
break;
}
if (!ln8411->wlc_ramp_out_vout_target)
vout_target = vbatt * 4;
if (!vout)
vout = pro_val.intval;
if (vout < vout_target) {
dev_dbg(ln8411->dev, "%s: underflow vout=%d, vbatt=%d (target=%d)\n",
__func__, vout, vbatt, vout_target);
return 0;
}
pro_val.intval = vout - ramp_down_step;
dev_dbg(ln8411->dev, "%s: vbatt=%d, wlc_vout=%d->%d\n", __func__, vbatt,
vout, pro_val.intval);
ret = power_supply_set_property(wlc_psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&pro_val);
if (ret < 0) {
dev_err(ln8411->dev, "%s: cannot set vout %d\n", __func__, ret);
break;
}
msleep(ln8411->wlc_ramp_out_delay);
vout = pro_val.intval;
}
return -EIO;
}
static int ln8411_set_mode(struct ln8411_charger *ln8411, const int val)
{
enum ln8411_modes mode;
int ret;
switch (val) {
case CHG_2TO1_DC_MODE:
mode = LN8411_FWD2TO1;
break;
case CHG_4TO1_DC_MODE:
mode = LN8411_FWD4TO1;
break;
case CHG_1TO2_DC_MODE:
mode = LN8411_REV1TO2;
break;
case CHG_NO_DC_MODE:
mode = LN8411_FWD1TO1;
break;
default:
return -EINVAL;
}
ret = regmap_update_bits(ln8411->regmap, LN8411_CTRL4, LN8411_MODE_MASK, mode);
if (ret)
goto done;
/* Workaround for A1 for 2:1 and 1:2 mode */
if ((val == CHG_2TO1_DC_MODE || val == CHG_1TO2_DC_MODE)
&& ln8411->chip_info.chip_rev == 1) {
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_SW_OVERRIDE);
if (ret)
goto done;
ret = regmap_set_bits(ln8411->regmap, 0x93, 0x2);
if (ret)
goto done;
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_LOCK);
if (ret)
goto done;
}
done:
return ret;
}
static int ln8411_set_status_charging(struct ln8411_charger *ln8411)
{
int ret;
ret = regmap_set_bits(ln8411->regmap, LN8411_CTRL1, LN8411_QB_EN);
if (ret)
return ret;
msleep(30);
ret = regmap_set_bits(ln8411->regmap, LN8411_CTRL1, LN8411_CP_EN);
if (ret)
return ret;
return ret;
}
static int ln8411_set_prot_by_chg_mode(const struct ln8411_charger *ln8411)
{
int ret;
int mode_idx, i;
mode_idx = ln8411->chg_mode - 1;
if (mode_idx < 0 || mode_idx >= CHG_1TO2_DC_MODE) {
dev_info(ln8411->dev, "%s: Invalid mode: %d\n", __func__, mode_idx + 1);
return -EINVAL;
}
/* unlock private register space */
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_SW_OVERRIDE);
if (ret) {
dev_info(ln8411->dev, "%s: Error unlocking private reg (%d)\n", __func__, ret);
goto error_done;
}
for (i = 0; i < sizeof(mode_settings[0]) / sizeof(mode_settings[0][0]); i++) {
if (!mode_settings[mode_idx][i][0])
continue;
if (mode_settings[mode_idx][i][2])
ret = regmap_update_bits(ln8411->regmap, mode_settings[mode_idx][i][0],
mode_settings[mode_idx][i][2],
mode_settings[mode_idx][i][1]);
else
ret = regmap_write(ln8411->regmap, mode_settings[mode_idx][i][0],
mode_settings[mode_idx][i][1]);
if (ret) {
dev_info(ln8411->dev, "Error setting reg mode: %d, reg: %#02x, val: %#02x (%d)\n",
ln8411->chg_mode, mode_settings[mode_idx][i][0],
mode_settings[mode_idx][i][1], ret);
goto error_done;
}
}
error_done:
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_LOCK);
if (ret)
dev_info(ln8411->dev, "%s: Error locking private reg (%d)\n", __func__, ret);
return ret;
}
/* call holding mutex_lock(&ln8411->lock); */
static int ln8411_set_charging(struct ln8411_charger *ln8411, bool enable)
{
int ret;
dev_dbg(ln8411->dev, "%s: enable=%d ta_type=%d\n", __func__, enable, ln8411->ta_type);
if (enable && ln8411_get_charging_enabled(ln8411) == enable) {
dev_dbg(ln8411->dev, "%s: no op, already enabled\n", __func__);
return 0;
}
if (enable) {
int val;
/* Integration guide V1.0 Section 5.3 */
/* check power source present */
ret = regmap_read(ln8411->regmap, LN8411_INT_STAT, &val);
if (ret)
goto error;
val &= (LN8411_VWPC_INSERT_STAT | LN8411_VUSB_INSERT_STAT);
if (!val) {
dev_info(ln8411->dev, "No power source. Not enabling charging\n");
goto error;
}
/* Ensure we are in standby to start charging */
ret = regmap_read(ln8411->regmap, LN8411_SYS_STS, &val);
if (ret || !(val & LN8411_STANDBY_STS)) {
dev_info(ln8411->dev, "%s: ret=%d Not in standby SYS_STS: %#02x\n",
__func__, ret, val);
goto error;
}
/* Start charging */
ret = ln8411_set_status_charging(ln8411);
if (ret < 0)
goto error;
} else {
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
struct power_supply *wlc_psy;
wlc_psy = ln8411_get_rx_psy(ln8411);
if (wlc_psy) {
int ret;
ret = ln8411_wlc_ramp_down_iin(ln8411, wlc_psy);
if (ret < 0)
dev_err(ln8411->dev, "cannot ramp out iin (%d)\n", ret);
ret = ln8411_wlc_ramp_down_vout(ln8411, wlc_psy);
if (ret < 0)
dev_err(ln8411->dev, "cannot ramp out vout (%d)\n", ret);
}
}
/* Integration guide V1.0 Section 5.4 */
/* turn off charging */
ret = regmap_clear_bits(ln8411->regmap, LN8411_CTRL1, LN8411_CP_EN);
if (ret < 0)
goto error;
msleep(60);
ret = regmap_clear_bits(ln8411->regmap, LN8411_CTRL1, LN8411_QB_EN);
if (ret < 0)
goto error;
}
error:
if (ret)
dev_info(ln8411->dev, "%s: Error: ret:%d\n", __func__, ret);
else
dev_dbg(ln8411->dev, "%s: End\n", __func__);
return ret;
}
static int ln8411_check_state(struct ln8411_charger *ln8411, int loglevel)
{
int ret;
unsigned int int_flag = 0, int_stat = 0, comp_flag0 = 0, comp_flag1 = 0, ctrl5 = 0;
ret = regmap_read(ln8411->regmap, LN8411_INT_FLAG, &int_flag);
ret |= regmap_read(ln8411->regmap, LN8411_INT_STAT, &int_stat);
ret |= regmap_read(ln8411->regmap, LN8411_COMP_FLAG0, &comp_flag0);
ret |= regmap_read(ln8411->regmap, LN8411_COMP_FLAG1, &comp_flag1);
ret |= regmap_read(ln8411->regmap, LN8411_CTRL5, &ctrl5);
logbuffer_prlog(ln8411, loglevel,
"%s: ret: %d, INT_FLAG: %#02x, STAT: %#02x, COMP_FLAG0: %#02x, COMP_FLAG1: %#02x\n",
__func__, ret, int_flag, int_stat, comp_flag0, comp_flag1);
logbuffer_prlog(ln8411, loglevel, "%s: CTRL5: %#02x\n", __func__, ctrl5);
return ret;
}
static int ln8411_check_not_active(struct ln8411_charger *ln8411, int loglevel)
{
int ret, rc = -EINVAL;
unsigned int reg;
u8 safety_sts[4];
ret = regmap_read(ln8411->regmap, LN8411_SYS_STS, &reg);
if (ret < 0)
goto done;
if (reg & LN8411_STANDBY_STS) {
rc = -EAGAIN;
logbuffer_prlog(ln8411, loglevel, "%s: in standby\n", __func__);
} else if (reg & LN8411_SHUTDOWN_STS) {
rc = -EINVAL;
logbuffer_prlog(ln8411, loglevel, "%s: in shutdown\n", __func__);
} else {
rc = 0;
}
ret = regmap_bulk_read(ln8411->regmap, LN8411_SAFETY_STS, safety_sts, 4);
done:
logbuffer_prlog(ln8411, loglevel,
"%s: ret: %d, LN8411_SAFETY_STS 0x99:%#02x, 0x9a:%#02x, 0x9b:%#02x, 0x9c:%#02x\n",
__func__, ret, safety_sts[0], safety_sts[1], safety_sts[2], safety_sts[3]);
return rc;
}
int ln8411_check_active(struct ln8411_charger *ln8411)
{
int ret;
unsigned int reg, val;
/* Integration guide V1.0 Section 5.3.4 */
ret = regmap_read(ln8411->regmap, LN8411_SYS_STS, &reg);
if (ret < 0) {
dev_err(ln8411->dev, "Error reading LN8411_SYS_STS err: %d\n", ret);
return ret;
}
if (ln8411->chg_mode == CHG_4TO1_DC_MODE)
val = (reg == (LN8411_PMID_SWITCH_OK_STS | LN8411_INFET_OK_STS
| LN8411_SWITCHING41_ACTIVE_STS));
else if (ln8411->chg_mode == CHG_2TO1_DC_MODE || ln8411->chg_mode == CHG_1TO2_DC_MODE)
val = (reg == (LN8411_PMID_SWITCH_OK_STS | LN8411_INFET_OK_STS
| LN8411_SWITCHING21_ACTIVE_STS));
else
val = 0;
if (!val) {
dev_err(ln8411->dev, "%s: CP Not switching LN8411_SYS_STS: %#02X\n",
__func__, reg);
return -EINVAL;
}
return 1;
}
/*
* 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
* ln8411_check_active_state().
*
* Other contexts:
* . ln8411_charge_adjust_ccmode
* . ln8411_charge_ccmode
* . ln8411_charge_start_cvmode
* . ln8411_charge_cvmode
*
* call holding mutex_lock(&ln8411->lock)
*/
static int ln8411_check_error(struct ln8411_charger *ln8411)
{
int ret = -EINVAL, vbatt;
/* LN8411 is active state */
if (ln8411_check_active(ln8411) == 1) {
dev_dbg(ln8411->dev, "%s: Active Status ok\n", __func__);
return 0;
}
/* LN8411 is charging */
/* Check whether the battery voltage is over the minimum */
vbatt = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (vbatt <= LN8411_DC_VBAT_MIN)
/* Abnormal battery level */
dev_err(ln8411->dev, "%s: Error abnormal battery voltage=%d\n", __func__, vbatt);
ln8411_check_state(ln8411, LOGLEVEL_ERR);
ret = ln8411_check_not_active(ln8411, LOGLEVEL_ERR);
/*
* Sometimes battery driver might call set_property function
* to stop charging during msleep. At this case, charging
* state would change DC_STATE_NO_CHARGING. LN8411 should
* stop checking RCP condition and exit timer_work
*/
if (ln8411->charging_state == DC_STATE_NO_CHARGING)
dev_err(ln8411->dev, "%s: other driver forced stop\n", __func__);
dev_dbg(ln8411->dev, "%s: Not Active Status=%d\n", __func__, ret);
return ret;
}
static int ln8411_get_iin(struct ln8411_charger *ln8411, int *iin)
{
const int offset = 0;
int temp;
temp = ln8411_read_adc(ln8411, ADCCH_IIN);
if (temp < 0)
return temp;
if (temp < offset)
temp = offset;
*iin = conv_chg_mode(ln8411, temp - offset);
return 0;
}
/* only needed for logging */
static int ln8411_get_batt_info(struct ln8411_charger *ln8411, int info_type, int *info)
{
union power_supply_propval val;
enum power_supply_property psp;
int ret;
if (!ln8411->batt_psy)
ln8411->batt_psy = power_supply_get_by_name("battery");
if (!ln8411->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(ln8411->batt_psy, psp, &val);
if (ret == 0)
*info = val.intval;
return ret;
}
/* only needed for logging */
static int ln8411_get_ibatt(struct ln8411_charger *ln8411, int *info)
{
return ln8411_get_batt_info(ln8411, BATT_CURRENT, info);
}
static int ln8411_get_current_adcs(struct ln8411_charger *ln8411, int *pibat, int *picn, int *piin)
{
int rc = ln8411_get_ibatt(ln8411, pibat);
if (rc)
goto error;
rc = ln8411_get_iin(ln8411, picn);
if (rc)
goto error;
*piin = ln8411_read_adc(ln8411, ADCCH_IIN);
return 0;
error:
logbuffer_prlog(ln8411, LOGLEVEL_ERR, "%s: Error: rc=%d", __func__, rc);
return rc;
}
static void ln8411_prlog_state(struct ln8411_charger *ln8411, const char *fn)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
int vbat = ln8411_read_adc(ln8411, ADCCH_VBAT);
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
goto error;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: vbat=%d, iin=%d, iin_cc=%d, icn=%d ibat=%d, cc_max=%d rc=%d",
fn, vbat, iin, ln8411->iin_cc, icn, ibat, ln8411->cc_max, rc);
return;
error:
dev_info(ln8411->dev, "Error reading ibatt or icn: rc: %d, ibatt: %d, icn: %d\n",
rc, ibat, icn);
}
static int ln8411_read_status(struct ln8411_charger *ln8411)
{
int ret = 0;
unsigned int reg_val;
ret = regmap_read(ln8411->regmap, LN8411_FAULT3_STS, &reg_val);
if (ret < 0) {
dev_err(ln8411->dev, "Error reading LN8411_FAULT3_STS: %d\n", ret);
return ret;
}
/* Temporary for A1 silicon: Use ADC
if (reg_val & LN8411_IBUS_ALARM_STS) {
ret = STS_MODE_IIN_LOOP;
} else if (reg_val & LN8411_VBAT_ALARM_STS) {
ret = STS_MODE_VFLT_LOOP;
} else {
ret = STS_MODE_LOOP_INACTIVE;
}
*/
if (ln8411_read_adc(ln8411, ADCCH_IIN) >= ln8411->iin_reg)
ret = STS_MODE_IIN_LOOP;
else if (ln8411_read_adc(ln8411, ADCCH_VBAT) >= ln8411->vfloat_reg)
ret = STS_MODE_VFLT_LOOP;
else
ret = STS_MODE_LOOP_INACTIVE;;
return ret;
}
static int ln8411_const_charge_voltage(struct ln8411_charger *ln8411);
static int ln8411_check_status(struct ln8411_charger *ln8411)
{
int icn = -EINVAL, ibat = -EINVAL, vbat = -EINVAL;
int rc, status;
status = ln8411_read_status(ln8411);
if (status < 0)
goto error;
rc = ln8411_get_iin(ln8411, &icn);
if (rc)
goto error;
rc = ln8411_get_batt_info(ln8411, BATT_CURRENT, &ibat);
if (rc)
goto error;
rc = ln8411_get_batt_info(ln8411, BATT_VOLTAGE, &vbat);
error:
dev_dbg(ln8411->dev, "%s: status=%d rc=%d icn:%d ibat:%d delta_c=%d, vbat:%d, fv:%d, cc_max:%d\n",
__func__, status, rc, icn, ibat, icn - ibat, vbat,
ln8411->fv_uv, ln8411->cc_max);
return status;
}
/* hold mutex_lock(&ln8411->lock); */
static int ln8411_recover_ta(struct ln8411_charger *ln8411)
{
int ret;
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
ln8411->ta_vol = 0; /* set to a value to change rx vol */
ret = ln8411_send_rx_voltage(ln8411, MSG_REQUEST_FIXED_PDO);
} else {
/* TODO: recover TA to value before handoff, or use DT */
ln8411->ta_vol = 9000000;
ln8411->ta_cur = 2200000;
ln8411->ta_objpos = 1; /* PDO1 - fixed 5V */
ret = ln8411_send_pd_message(ln8411, MSG_REQUEST_FIXED_PDO);
}
/* will not be able to recover if TA is offline */
if (ret < 0)
dev_dbg(ln8411->dev, "%s: cannot recover TA (%d)\n", __func__, ret);
return 0;
}
/* Stop Charging */
static int ln8411_stop_charging(struct ln8411_charger *ln8411)
{
int ret = 0;
/* mark the end with \n in logbuffer */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: ln8411->charging_state=%d ret=%d\n",
__func__, ln8411->charging_state, ret);
mutex_lock(&ln8411->lock);
/* Check the current state */
if (ln8411->charging_state == DC_STATE_NO_CHARGING)
goto done;
/* Stop Direct charging */
cancel_delayed_work(&ln8411->timer_work);
cancel_delayed_work(&ln8411->pps_work);
ln8411->timer_id = TIMER_ID_NONE;
ln8411->timer_period = 0;
/* Clear parameter */
ln8411->charging_state = DC_STATE_NO_CHARGING;
ln8411->ret_state = DC_STATE_NO_CHARGING;
ln8411->prev_iin = 0;
ln8411->prev_inc = INC_NONE;
ln8411->chg_mode = CHG_NO_DC_MODE;
/* restore to config */
ln8411->pdata->iin_cfg = ln8411->pdata->iin_cfg_max;
ln8411->pdata->v_float = ln8411->pdata->v_float_dt;
/*
* Clear charging configuration
* TODO: use defaults when these are negative or zero at startup
* NOTE: cc_max is twice of IIN + headroom
*/
ln8411->cc_max = -1;
ln8411->fv_uv = -1;
/* Clear requests for new Vfloat and new IIN */
ln8411->new_vfloat = 0;
ln8411->new_iin = 0;
/* used to start DC and during errors */
ln8411->retry_cnt = 0;
/* close stats */
ln8411_chg_stats_done(&ln8411->chg_data, ln8411);
ln8411_chg_stats_dump(ln8411);
/* TODO: something here to prep TA for the switch */
ret = ln8411_set_charging(ln8411, false);
if (ret < 0)
dev_err(ln8411->dev, "%s: Error-set_charging(main)\n", __func__);
/* Integration guide V1.0 Section 4 - reinitialize on stop charging */
ln8411->hw_init_done = false;
if (!ln8411_hw_init(ln8411))
ln8411->hw_init_done = true;
/* stop charging and recover TA voltage */
if (ln8411->mains_online == true)
ln8411_recover_ta(ln8411);
power_supply_changed(ln8411->mains);
done:
mutex_unlock(&ln8411->lock);
__pm_relax(ln8411->monitor_wake_lock);
dev_dbg(ln8411->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
* ln8411_charge_ccmode() when loop becomes not active.
*
* ln8411_charge_ccmode() ->
* -> ln8411_set_rx_voltage_comp()
* -> ln8411_set_ta_voltage_comp()
* -> ln8411_set_ta_current_comp2()
*
* NOTE: call holding mutex_lock(&ln8411->lock);
*/
static int ln8411_set_ta_current_comp(struct ln8411_charger *ln8411)
{
const int iin_high = ln8411->iin_cc + ln8411->pdata->iin_cc_comp_offset;
const int iin_low = ln8411->iin_cc - ln8411->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d prev_iin=%d",
__func__, iin, iin_low, ln8411->iin_cc, iin_high,
icn, ibat, ln8411->cc_max, rc,
ln8411->prev_iin);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > iin_high) {
/* TA current is higher than the target input current */
if (ln8411->ta_cur > ln8411->iin_cc) {
/* TA current is over than IIN_CC */
/* Decrease TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont1: ta_cur=%u",
ln8411->ta_cur);
/* TA current is already less than IIN_CC */
/* Compara IIN_ADC with the previous IIN_ADC */
} else if (iin < (ln8411->prev_iin - LN8411_IIN_ADC_OFFSET)) {
/* Assume that TA operation mode is CV mode */
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2-1: ta_vol=%u",
ln8411->ta_vol);
} else {
/* Assume TA operation mode is CL mode */
/* Decrease TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2-2: ta_cur=%u",
ln8411->ta_cur);
}
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else if (iin < iin_low) {
/* compare IIN ADC with previous IIN ADC + 20mA */
if (iin > (ln8411->prev_iin + LN8411_IIN_ADC_OFFSET)) {
/*
* TA voltage is not enough to supply the operating
* current of RDO: increase TA voltage
*/
/* Compare TA max voltage */
if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA max current */
if (!ln8411_can_inc_ta_cur(ln8411)) {
/* TA voltage and current are at max */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1: ta_vol=%u, ta_cur=%u",
ln8411->ta_vol, ln8411->ta_cur);
/* Set timer */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Cont3: ta_cur=%u",
ln8411->ta_cur);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Cont4: ta_vol=%u", ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_VOL;
}
/* TA current is lower than the target input current */
/* Check the previous TA increment */
} else if (ln8411->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 (!ln8411_can_inc_ta_cur(ln8411)) {
/* TA current is already the maximum current */
/* Compare TA max voltage */
if (ln8411->ta_vol == ln8411->ta_max_vol) {
/*
* TA voltage and current are already
* the maximum values
*/
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End2: ta_vol=%u, ta_cur=%u",
ln8411->ta_vol, ln8411->ta_cur);
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
/* Increase TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Cont5: ta_vol=%u",
ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_VOL;
}
} else {
const unsigned int ta_cur = ln8411->ta_cur +
PD_MSG_TA_CUR_STEP;
/* Increase TA current (50mA) */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Cont6: ta_cur=%u->%u",
ln8411->ta_cur, ta_cur);
ln8411->ta_cur = ln8411->ta_cur + PD_MSG_TA_CUR_STEP;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
ln8411->prev_inc = INC_TA_CUR;
}
/*
* The previous increment was TA current, but input current
* did not increase. Try to increase TA voltage.
*/
} else if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA maximum current */
if (!ln8411_can_inc_ta_cur(ln8411)) {
/*
* TA voltage and current are already at the
* maximum values
*/
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End3: ta_vol=%u, ta_cur=%u",
ln8411->ta_vol, ln8411->ta_cur);
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Cont7: ta_cur=%u", ln8411->ta_cur);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Comp. Cont8: ta_vol=%u->%u",
ln8411->ta_vol, ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_VOL;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Comp. End4(valid): ta_vol=%u, ta_cur=%u",
ln8411->ta_vol, ln8411->ta_cur);
/* Set timer */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
/* b/186969924: reset increment state on valid */
ln8411->prev_inc = INC_NONE;
}
/* Save previous iin adc */
ln8411->prev_iin = iin;
return 0;
}
/*
* max iin given cc_max and iin_cfg.
* TODO: maybe use pdata->iin_cfg if cc_max is zero or negative.
*/
static int ln8411_get_iin_max(const struct ln8411_charger *ln8411, int cc_max)
{
const int cc_limit = ln8411->pdata->iin_max_offset +
cc_max / conv_chg_mode(ln8411, 1);
int iin_max;
iin_max = min(ln8411->pdata->iin_cfg_max, (unsigned int)cc_limit);
dev_dbg(ln8411->dev, "%s: iin_max=%d iin_cfg=%u iin_cfg_max=%d cc_max=%d cc_limit=%d\n",
__func__, iin_max, ln8411->pdata->iin_cfg,
ln8411->pdata->iin_cfg_max, cc_max, cc_limit);
return iin_max;
}
/* Compensate TA current for constant power mode */
/* hold mutex_lock(&ln8411->lock), schedule on return 0 */
static int ln8411_set_ta_current_comp2(struct ln8411_charger *ln8411)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, 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,
ln8411->iin_cc - LN8411_IIN_CC_COMP_OFFSET_CP,
ln8411->iin_cc,
ln8411->iin_cc + LN8411_IIN_CC_COMP_OFFSET_CP,
ln8411->pdata->iin_cfg,
icn, ibat, ln8411->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (ln8411->pdata->iin_cfg + ln8411->pdata->iin_cc_comp_offset)) {
/* TA current is higher than the target input current limit */
ln8411->ta_cur = ln8411->ta_cur - PD_MSG_TA_CUR_STEP;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else if (iin < (ln8411->iin_cc - LN8411_IIN_CC_COMP_OFFSET_CP)) {
/* TA current is lower than the target input current */
/* IIN_ADC < IIN_CC -20mA */
if (ln8411->ta_vol == ln8411->ta_max_vol) {
const int iin_cc_lb = ln8411->iin_cc -
ln8411->pdata->iin_cc_comp_offset;
/* Check IIN_ADC < IIN_CC - 50mA */
if (iin < iin_cc_lb) {
unsigned int ta_max_vol = 0;
unsigned int iin_apdo;
unsigned int val;
if (ln8411->chg_mode == CHG_4TO1_DC_MODE)
ta_max_vol =
ln8411->pdata->ta_max_vol_4_1 * CHG_4TO1_DC_MODE;
else if (ln8411->chg_mode == CHG_2TO1_DC_MODE)
ta_max_vol =
ln8411->pdata->ta_max_vol_2_1 * CHG_2TO1_DC_MODE;
/* Set new IIN_CC to IIN_CC - 50mA */
ln8411->iin_cc = ln8411->iin_cc -
ln8411->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 = ln8411->iin_cc / PD_MSG_TA_CUR_STEP;
iin_apdo = iin_apdo * PD_MSG_TA_CUR_STEP;
/* in mV */
val = ln8411->ta_max_pwr / (iin_apdo / ln8411->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 */
ln8411->ta_max_vol = min(val, ta_max_vol);
/* Increase TA voltage(40mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP * 2;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Cont1: ta_vol=%u",
ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else {
/* Wait for next current step compensation */
/* IIN_CC - 50mA < IIN ADC < IIN_CC - 20mA */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Comp.(wait): ta_vol=%u",
ln8411->ta_vol);
/* Set timer */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK2_T;
}
} else {
/* Increase TA voltage(40mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP * 2;
if (ln8411->ta_vol > ln8411->ta_max_vol)
ln8411->ta_vol = ln8411->ta_max_vol;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CFG + 50mA */
dev_dbg(ln8411->dev, "End(valid): ta_vol=%u\n", ln8411->ta_vol);
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK2_T;
/* b/186969924: reset increment state on valid */
ln8411->prev_inc = INC_NONE;
}
/* Save previous iin adc */
ln8411->prev_iin = iin;
return 0;
}
/* Compensate TA voltage for the target input current */
/* hold mutex_lock(&ln8411->lock), schedule on return 0 */
static int ln8411_set_ta_voltage_comp(struct ln8411_charger *ln8411)
{
const int iin_high = ln8411->iin_cc + ln8411->pdata->iin_cc_comp_offset;
const int iin_low = ln8411->iin_cc - ln8411->pdata->iin_cc_comp_offset;
const int ibat_limit = (ln8411->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
dev_dbg(ln8411->dev, "%s: = charging_state=%u == \n", __func__,
ln8411->charging_state);
/* IIN = IBAT+SYSLOAD */
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin, iin_low, ln8411->iin_cc, iin_high,
icn, ibat, ln8411->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > iin_high) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else if (iin < ln8411->iin_cc - ln8411->pdata->iin_cc_comp_offset) {
/* TA current is lower than the target input current */
/* Compare TA max voltage */
if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* TA is already at maximum voltage */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,"End1(max TA vol): ta_vol=%u",
ln8411->ta_vol);
/* Set timer */
/* Check the current charging state */
if (ln8411->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
/* CV mode */
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = LN8411_CVMODE_CHECK_T;
}
} else {
const unsigned int ta_vol = ln8411->ta_vol;
/* Increase TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2: ta_vol:%u->%u",
ta_vol, ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End(valid): ta_vol=%u low_ibat=%d\n",
ln8411->ta_vol, ibat < ibat_limit);
/* Check the current charging state */
if (ln8411->charging_state == DC_STATE_CC_MODE) {
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = LN8411_CVMODE_CHECK_T;
}
}
return 0;
}
/* hold mutex_lock(&ln8411->lock), schedule on return 0 */
static int ln8411_set_rx_voltage_comp(struct ln8411_charger *ln8411)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, 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,
ln8411->iin_cc - ln8411->pdata->iin_cc_comp_offset,
ln8411->iin_cc,
ln8411->iin_cc + ln8411->pdata->iin_cc_comp_offset,
icn, ibat, ln8411->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (ln8411->iin_cc + ln8411->pdata->iin_cc_comp_offset)) {
/* RX current is higher than the target input current */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont1: rx_vol=%u",
ln8411->ta_vol);
/* Set RX Voltage */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else if (iin < (ln8411->iin_cc - ln8411->pdata->iin_cc_comp_offset)) {
/* RX current is lower than the target input current */
/* Compare RX max voltage */
if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* TA current is already the maximum voltage */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1(max RX vol): rx_vol=%u",
ln8411->ta_vol);
/* Check the current charging state */
if (ln8411->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
/* CV mode */
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = LN8411_CVMODE_CHECK_T;
}
} else {
/* Increase RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol + WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2: rx_vol=%u",
ln8411->ta_vol);
/* Set RX Voltage */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "End(valid): rx_vol=%u",
ln8411->ta_vol);
if (ln8411->charging_state == DC_STATE_CC_MODE) {
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = LN8411_CCMODE_CHECK1_T;
} else {
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = LN8411_CVMODE_CHECK_T;
}
}
return 0;
}
/*
* iin limit for the adapter for the chg_mode
* Minimum between the configuration, cc_max (scaled with offset) and the
* adapter capabilities.
*/
static int ln8411_get_iin_limit(const struct ln8411_charger *ln8411)
{
int iin_cc;
iin_cc = ln8411_get_iin_max(ln8411, ln8411->cc_max);
if (ln8411->ta_max_cur < iin_cc)
iin_cc = ln8411->ta_max_cur;
dev_dbg(ln8411->dev, "%s: iin_cc=%d ta_max_cur=%u, chg_mode=%d\n", __func__,
iin_cc, ln8411->ta_max_cur, ln8411->chg_mode);
return iin_cc;
}
/* recalculate ->ta_vol looking at demand (cc_max) */
static int ln8411_set_wireless_dc(struct ln8411_charger *ln8411, int vbat)
{
unsigned long val;
ln8411->iin_cc = ln8411_get_iin_limit(ln8411);
ln8411->ta_vol = 2 * vbat * ln8411->chg_mode + LN8411_WLC_VOL_PRE_OFFSET;
/* RX voltage resolution is 100mV */
val = ln8411->ta_vol / WCRX_VOL_STEP;
ln8411->ta_vol = val * WCRX_VOL_STEP;
/* Set RX voltage to MIN[RX voltage, RX_MAX_VOL*chg_mode] */
ln8411->ta_vol = min(ln8411->ta_vol, ln8411->ta_max_vol);
/* ta_cur is ignored */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_max_vol=%d", __func__,
ln8411->iin_cc, ln8411->ta_vol, ln8411->ta_max_vol);
return 0;
}
/* recalculate ->ta_vol and ->ta_cur looking at demand (cc_max) */
static int ln8411_set_wired_dc(struct ln8411_charger *ln8411, int vbat)
{
const unsigned long ta_max_vol = ln8411->ta_max_vol;
unsigned long val;
int iin_cc;
ln8411->iin_cc = ln8411_get_iin_limit(ln8411);
/* Update OCP_WARN_THRES as chg_mode might have changed to 2:1 */
ln8411_set_input_current(ln8411, ln8411->iin_cc);
ln8411->pdata->iin_cfg = ln8411->iin_cc;
/* Calculate new TA max voltage, current */
val = ln8411->iin_cc / PD_MSG_TA_CUR_STEP;
iin_cc = val * PD_MSG_TA_CUR_STEP;
val = ln8411->ta_max_pwr / (iin_cc / ln8411->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 */
ln8411->ta_max_vol = min(val, ta_max_vol);
ln8411->ta_vol = 2 * vbat * ln8411->chg_mode + LN8411_TA_VOL_PRE_OFFSET;
/* PPS voltage resolution is 20mV */
val = ln8411->ta_vol / PD_MSG_TA_VOL_STEP;
ln8411->ta_vol = val * PD_MSG_TA_VOL_STEP;
ln8411->ta_vol = min(ln8411->ta_vol, ln8411->ta_max_vol);
ln8411->ta_cur = min((int)ln8411->ta_max_cur, iin_cc + LN8411_TA_CUR_MAX_OFFSET);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_cur=%d ta_max_vol=%d",
__func__, ln8411->iin_cc, ln8411->ta_vol, ln8411->ta_cur,
ln8411->ta_max_vol);
return 0;
}
/*
* like ln8411_preset_dcmode() but will not query the TA.
* Called from timer:
* [ln8411_charge_ccmode | ln8411_charge_cvmode] ->
* ln8411_apply_new_iin() ->
* ln8411_adjust_ta_current() ->
* ln8411_reset_dcmode()
* ln8411_apply_new_vfloat() ->
* ln8411_reset_dcmode()
*
* NOTE: caller holds mutex_lock(&ln8411->lock);
*/
static int ln8411_reset_dcmode(struct ln8411_charger *ln8411)
{
int ret = -EINVAL, vbat;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
dev_dbg(ln8411->dev, "%s: = charging_state=%u == \n", __func__,
ln8411->charging_state);
if (ln8411->cc_max < 0) {
dev_err(ln8411->dev, "%s: invalid cc_max=%d\n", __func__, ln8411->cc_max);
goto error;
}
/*
* VBAT is over threshold but it might be "bouncy" due to transitory
* used to determine ta_vout.
*/
vbat = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (vbat < 0)
return vbat;
/* Check the TA type and set the charging mode */
if (ln8411->ta_type == TA_TYPE_WIRELESS)
ret = ln8411_set_wireless_dc(ln8411, vbat);
else
ret = ln8411_set_wired_dc(ln8411, vbat);
/* Clear previous IIN ADC, TA increment flag */
ln8411->prev_inc = INC_NONE;
ln8411->prev_iin = 0;
error:
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* The caller was triggered from ln8411_apply_new_iin(), return to the
* calling CC or CV loop.
* call holding mutex_unlock(&ln8411->lock);
*/
static void ln8411_return_to_loop(struct ln8411_charger *ln8411)
{
switch (ln8411->ret_state) {
case DC_STATE_CC_MODE:
ln8411->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_CV_MODE:
ln8411->timer_id = TIMER_CHECK_CVMODE;
break;
default:
dev_err(ln8411->dev, "%s: invalid ret_state=%u\n",
__func__, ln8411->ret_state);
return;
}
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, ln8411->ret_state);
ln8411->charging_state = ln8411->ret_state;
ln8411->timer_period = 1000;
ln8411->ret_state = 0;
ln8411->new_iin = 0;
}
/*
* Kicked from ln8411_apply_new_iin() when ln8411->new_iin!=0 and completed
* off the timer. Never called on WLC_DC.
* NOTE: Will return to the calling loop in ->ret_state
*/
static int ln8411_adjust_ta_current(struct ln8411_charger *ln8411)
{
const int ta_limit = ln8411->iin_cc;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
int ret = 0;
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, 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, ln8411->iin_cc, ta_limit, ln8411->pdata->iin_cfg,
icn, ibat, ln8411->cc_max, rc);
if (ln8411->charging_state != DC_STATE_ADJUST_TACUR)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_ADJUST_TACUR);
ln8411->charging_state = DC_STATE_ADJUST_TACUR;
if (ln8411->ta_cur == ta_limit) {
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"adj. End, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
ln8411->ta_cur, ln8411->ta_vol,
ln8411->iin_cc, ln8411->chg_mode);
/* "Recover" IIN_CC to the original value (new_iin) */
ln8411->iin_cc = ln8411->new_iin;
ln8411_return_to_loop(ln8411);
} else if (ln8411->iin_cc > ln8411->pdata->iin_cfg) {
const int old_iin_cfg = ln8411->pdata->iin_cfg;
/* Raise iin_cfg to the new iin_cc value (why??!?!?) */
ln8411->pdata->iin_cfg = ln8411->iin_cc;
ret = ln8411_set_input_current(ln8411, ln8411->iin_cc);
if (ret == 0)
ret = ln8411_reset_dcmode(ln8411);
if (ret < 0)
goto error;
logbuffer_prlog(ln8411, 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",
ln8411->ta_max_vol, ln8411->ta_max_cur,
ln8411->ta_max_pwr, ln8411->iin_cc,
old_iin_cfg, ln8411->iin_cc,
ln8411->chg_mode);
ln8411->new_iin = 0;
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_ADJUST_CC);
/* Send PD Message and go to Adjust CC mode */
ln8411->charging_state = DC_STATE_ADJUST_CC;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else {
unsigned int val;
/*
* Adjust IIN_CC with APDO resolution(50mA)
* ln8411->iin_cc will be reset to ln8411->new_iin when
* ->ta_cur reaches the ta_limit at the beginning of the
* function
*/
val = ln8411->iin_cc / PD_MSG_TA_CUR_STEP;
ln8411->iin_cc = val * PD_MSG_TA_CUR_STEP;
ln8411->ta_cur = ln8411->iin_cc;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "adjust iin=%u ta_cur=%d chg_mode=%d",
ln8411->iin_cc, ln8411->ta_cur, ln8411->chg_mode);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
/* reschedule on ret == 0 */
error:
return ret;
}
/* Kicked from apply_new_iin() then run off the timer
* call holding mutex_lock(&ln8411->lock);
*/
static int ln8411_adjust_ta_voltage(struct ln8411_charger *ln8411)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (ln8411->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_ADJUST_TAVOL);
ln8411->charging_state = DC_STATE_ADJUST_TAVOL;
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, 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, ln8411->iin_cc - PD_MSG_TA_CUR_STEP,
ln8411->iin_cc, ln8411->iin_cc + PD_MSG_TA_CUR_STEP,
icn, ibat, ln8411->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with targer input current */
if (iin > (ln8411->iin_cc + PD_MSG_TA_CUR_STEP)) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont1, ta_vol=%u",
ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else if (iin < (ln8411->iin_cc - PD_MSG_TA_CUR_STEP)) {
/* TA current is lower than the target input current */
if (ln8411_check_status(ln8411) == STS_MODE_VFLT_LOOP) {
/* IIN current may not able to increase in CV */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
ln8411->ta_cur, ln8411->ta_vol,
ln8411->iin_cc, ln8411->chg_mode);
ln8411_return_to_loop(ln8411);
} else if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* TA TA voltage is already at the maximum voltage */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
ln8411->ta_cur, ln8411->ta_vol,
ln8411->iin_cc, ln8411->chg_mode);
ln8411_return_to_loop(ln8411);
} else {
/* Increase TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2, ta_vol=%u",
ln8411->ta_vol);
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End2, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
ln8411->ta_cur, ln8411->ta_vol,
ln8411->iin_cc, ln8411->chg_mode);
ln8411_return_to_loop(ln8411);
}
return 0;
}
/*
* Kicked from apply_new_iin() then run off the timer
* * NOTE: caller must hold mutex_lock(&ln8411->lock)
*/
static int ln8411_adjust_rx_voltage(struct ln8411_charger *ln8411)
{
const int iin_high = ln8411->iin_cc + ln8411->pdata->iin_cc_comp_offset;
const int iin_low = ln8411->iin_cc - ln8411->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (ln8411->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_ADJUST_TAVOL);
ln8411->charging_state = DC_STATE_ADJUST_TAVOL;
rc = ln8411_get_current_adcs(ln8411, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > ln8411->cc_max;
if (ovc_flag)
ln8411_chg_stats_inc_ovcf(&ln8411->chg_data, ibat, ln8411->cc_max);
logbuffer_prlog(ln8411, ovc_flag ? LOGLEVEL_WARNING : LOGLEVEL_DEBUG,
"%s: iin=%d, iin_cc=[%d,%d,%d], icn=%d ibat=%d, cc_max=%d rc=%d",
__func__, iin, iin_low, ln8411->iin_cc, iin_high,
icn, ibat, ln8411->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with targer input current */
if (iin > iin_high) {
/* RX current is higher than the target input current */
/* Decrease RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont1, rx_vol=%u",
ln8411->ta_vol);
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
} else if (iin < iin_low) {
/* RX current is lower than the target input current */
if (ln8411_check_status(ln8411) == STS_MODE_VFLT_LOOP) {
/* RX current may not able to increase in CV */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, rx_vol=%u, iin_cc=%u",
ln8411->ta_vol, ln8411->iin_cc);
ln8411_return_to_loop(ln8411);
} else if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* RX current is already the maximum voltage */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1, rx_vol=%u, iin_cc=%u, chg_mode=%u",
ln8411->ta_vol, ln8411->iin_cc,
ln8411->chg_mode);
/* Return charging state to the previous state */
ln8411_return_to_loop(ln8411);
} else {
/* Increase RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol + WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2, rx_vol=%u",
ln8411->ta_vol);
/* Set RX voltage */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End2, rx_vol=%u, iin_cc=%u, chg_mode=%u",
ln8411->ta_vol, ln8411->iin_cc,
ln8411->chg_mode);
/* Return charging state to the previous state */
ln8411_return_to_loop(ln8411);
}
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(&ln8411->lock)
*/
static int ln8411_apply_new_iin(struct ln8411_charger *ln8411)
{
int ret;
logbuffer_prlog(ln8411, LOGLEVEL_INFO,
"new_iin=%d (cc_max=%d), ta_type=%d charging_state=%d",
ln8411->new_iin, ln8411->cc_max,
ln8411->ta_type, ln8411->charging_state);
/* iin_cfg is adjusted UP in ln8411_set_input_current() */
ret = ln8411_set_input_current(ln8411, ln8411->new_iin);
if (ret < 0)
return ret;
ln8411->pdata->iin_cfg = ln8411->new_iin;
/*
* ->ret_state is used to go back to the loop (CC or CV) that called
* this function.
*/
ln8411->ret_state = ln8411->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.
*/
ln8411->iin_cc = ln8411->new_iin;
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
ret = ln8411_adjust_rx_voltage(ln8411);
} else if (ln8411->iin_cc < LN8411_TA_MIN_CUR) {
/* TA current = LN8411_TA_MIN_CUR(1.0A) */
ln8411->ta_cur = LN8411_TA_MIN_CUR;
ret = ln8411_adjust_ta_voltage(ln8411);
} else {
ret = ln8411_adjust_ta_current(ln8411);
}
/* need reschedule on ret != 0 */
dev_dbg(ln8411->dev, "%s: ret=%d\n", __func__, ret);
return ret;
}
/*
* also called from ln8411_set_new_cc_max()
* call holding mutex_unlock(&ln8411->lock);
*/
static int ln8411_set_new_iin(struct ln8411_charger *ln8411, int iin)
{
int ret = 0;
if (iin < 0) {
dev_dbg(ln8411->dev, "%s: ignore negative iin=%d\n", __func__, iin);
return 0;
}
/* same as previous request nevermind */
if (iin == ln8411->new_iin)
return 0;
dev_dbg(ln8411->dev, "%s: new_iin=%d->%d state=%d\n", __func__,
ln8411->new_iin, iin, ln8411->charging_state);
/* apply iin_cc in ln8411_preset_config() at start */
if (ln8411->charging_state == DC_STATE_NO_CHARGING ||
ln8411->charging_state == DC_STATE_CHECK_VBAT) {
/* used on start vs the ->iin_cfg one */
ln8411->pdata->iin_cfg = iin;
ln8411->iin_cc = iin;
} else if (ln8411->ret_state == 0) {
/*
* ln8411_apply_new_iin() has not picked out the value yet
* and the value can be changed safely.
*/
ln8411->new_iin = iin;
/* might want to tickle the loop now */
} else {
/* the caller must retry */
ret = -EAGAIN;
}
dev_dbg(ln8411->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 ln8411_set_new_cc_max(struct ln8411_charger *ln8411, int cc_max)
{
const int prev_cc_max = ln8411->cc_max;
int iin_max, ret = 0;
if (cc_max < 0) {
dev_dbg(ln8411->dev, "%s: ignore negative cc_max=%d\n", __func__, cc_max);
return 0;
}
mutex_lock(&ln8411->lock);
/* same as previous request nevermind */
if (cc_max == ln8411->cc_max)
goto done;
/* iin will be capped by the adapter capabilities in reset_dcmode() */
iin_max = ln8411_get_iin_max(ln8411, cc_max);
if (iin_max <= 0) {
dev_dbg(ln8411->dev, "%s: ignore negative iin_max=%d\n", __func__, iin_max);
goto done;
}
ret = ln8411_set_new_iin(ln8411, iin_max);
if (ret == 0)
ln8411->cc_max = cc_max;
logbuffer_prlog(ln8411, LOGLEVEL_INFO,
"%s: charging_state=%d cc_max=%d->%d iin_max=%d, ret=%d",
__func__, ln8411->charging_state, prev_cc_max,
cc_max, iin_max, ret);
done:
dev_dbg(ln8411->dev, "%s: ret=%d\n", __func__, ret);
mutex_unlock(&ln8411->lock);
return ret;
}
/*
* Apply ln8411->new_vfloat to the charging voltage.
* Called from CC and CV loops, needs mutex_lock(&ln8411->lock)
*/
static int ln8411_apply_new_vfloat(struct ln8411_charger *ln8411)
{
int ret = 0;
if (ln8411->fv_uv == ln8411->new_vfloat)
goto error_done;
/* actually change the hardware */
ret = ln8411_set_vfloat(ln8411, ln8411->new_vfloat);
if (ret < 0)
goto error_done;
/* Restart the process if tier switch happened (either direction) */
if (ln8411->charging_state == DC_STATE_CV_MODE
&& abs(ln8411->new_vfloat - ln8411->fv_uv) > LN8411_TIER_SWITCH_DELTA) {
ret = ln8411_reset_dcmode(ln8411);
if (ret < 0) {
pr_err("%s: cannot reset dcmode (%d)\n", __func__, ret);
} else {
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_ADJUST_CC);
ln8411->charging_state = DC_STATE_ADJUST_CC;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
}
ln8411->fv_uv = ln8411->new_vfloat;
error_done:
logbuffer_prlog(ln8411, LOGLEVEL_INFO,
"%s: new_vfloat=%d, ret=%d", __func__,
ln8411->new_vfloat, ret);
if (ret == 0)
ln8411->new_vfloat = 0;
return ret;
}
static int ln8411_set_new_vfloat(struct ln8411_charger *ln8411, int vfloat)
{
int ret = 0;
if (vfloat < 0) {
dev_dbg(ln8411->dev, "%s: ignore negative vfloat %d\n", __func__, vfloat);
return 0;
}
mutex_lock(&ln8411->lock);
if (ln8411->new_vfloat == vfloat)
goto done;
/* use fv_uv at start in ln8411_preset_config() */
if (ln8411->charging_state == DC_STATE_NO_CHARGING ||
ln8411->charging_state == DC_STATE_CHECK_VBAT) {
ln8411->fv_uv = vfloat;
} else {
/* applied in ln8411_apply_new_vfloat() from CC or in CV loop */
ln8411->new_vfloat = vfloat;
pr_debug("%s: new_vfloat=%d\n", __func__, ln8411->new_vfloat);
/* might want to tickle the cycle */
}
done:
mutex_unlock(&ln8411->lock);
return ret;
}
/* called on loop inactive */
static int ln8411_ajdust_ccmode_wireless(struct ln8411_charger *ln8411, int iin)
{
/* IIN_ADC > IIN_CC -20mA ? */
if (iin > (ln8411->iin_cc - LN8411_IIN_ADC_OFFSET)) {
/* Input current is already over IIN_CC */
/* End RX voltage adjustment */
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
ln8411->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "End1: IIN_ADC=%d, rx_vol=%u",
iin, ln8411->ta_vol);
/* Clear TA increment flag */
ln8411->prev_inc = INC_NONE;
/* Go to CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = 0;
/* Check RX voltage */
} else if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* RX voltage is already max value */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,"End2: MAX value, rx_vol=%u max=%d",
ln8411->ta_vol, ln8411->ta_max_vol);
/* Clear TA increment flag */
ln8411->prev_inc = INC_NONE;
/* Go to CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = 0;
} else {
/* Try to increase RX voltage(100mV) */
ln8411->ta_vol = ln8411->ta_vol + WCRX_VOL_STEP;
if (ln8411->ta_vol > ln8411->ta_max_vol)
ln8411->ta_vol = ln8411->ta_max_vol;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont: rx_vol=%u",
ln8411->ta_vol);
/* Set RX voltage */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
return 0;
}
/* called on loop inactive */
static int ln8411_ajdust_ccmode_wired(struct ln8411_charger *ln8411, int iin)
{
/* USBPD TA is connected */
if (iin > (ln8411->iin_cc - LN8411_IIN_ADC_OFFSET)) {
/* IIN_ADC > IIN_CC -20mA ? */
/* Input current is already over IIN_CC */
/* End TA voltage and current adjustment */
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
ln8411->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End1: IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, ln8411->ta_vol, ln8411->ta_cur);
/* Clear TA increment flag */
ln8411->prev_inc = INC_NONE;
/* Go to CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = 0;
/* Check TA voltage */
} else if (ln8411->ta_vol == ln8411->ta_max_vol) {
/* TA voltage is already max value */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End2: MAX value, ta_vol=%u, ta_cur=%u",
ln8411->ta_vol, ln8411->ta_cur);
/* Clear TA increment flag */
ln8411->prev_inc = INC_NONE;
/* Go to CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->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 < (ln8411->iin_cc - LN8411_TA_IIN_OFFSET)) {
/*
* TA voltage too low to enter TA CC mode, so we
* should increase TA voltage
*/
ln8411->ta_vol = ln8411->ta_vol + LN8411_TA_VOL_STEP_ADJ_CC *
ln8411->chg_mode;
if (ln8411->ta_vol > ln8411->ta_max_vol)
ln8411->ta_vol = ln8411->ta_max_vol;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
ln8411->ta_vol);
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_VOL;
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* compare IIN ADC with previous IIN ADC + 20mA */
} else if (iin > (ln8411->prev_iin + LN8411_IIN_ADC_OFFSET)) {
/* TA can supply more current if TA voltage is high */
/* TA voltage too low for TA CC mode: increase it */
ln8411->ta_vol = ln8411->ta_vol +
LN8411_TA_VOL_STEP_ADJ_CC *
ln8411->chg_mode;
if (ln8411->ta_vol > ln8411->ta_max_vol)
ln8411->ta_vol = ln8411->ta_max_vol;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
ln8411->ta_vol);
/* Set TA increment flag */
ln8411->prev_inc = INC_TA_VOL;
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
/* Check the previous increment */
} else if (ln8411->prev_inc == INC_TA_CUR) {
/*
* The previous increment is TA current, but input
* current does not increase. Try with voltage.
*/
ln8411->ta_vol = ln8411->ta_vol +
LN8411_TA_VOL_STEP_ADJ_CC *
ln8411->chg_mode;
if (ln8411->ta_vol > ln8411->ta_max_vol)
ln8411->ta_vol = ln8411->ta_max_vol;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont3: ta_vol=%u",
ln8411->ta_vol);
ln8411->prev_inc = INC_TA_VOL;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->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 (!ln8411_can_inc_ta_cur(ln8411)) {
/* TA current is maximum current */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"End(MAX_CUR): IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, ln8411->ta_vol, ln8411->ta_cur);
ln8411->prev_inc = INC_NONE;
/* Go to CC mode */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = 0;
} else {
/* TA has tolerance and compensate it as real current */
/* Increase TA current(50mA) */
ln8411->ta_cur = ln8411->ta_cur + PD_MSG_TA_CUR_STEP;
if (ln8411->ta_cur > ln8411->ta_max_cur)
ln8411->ta_cur = ln8411->ta_max_cur;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "Cont4: ta_cur=%u",
ln8411->ta_cur);
ln8411->prev_inc = INC_TA_CUR;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
}
return 0;
}
/* Direct Charging Adjust CC MODE control
* called at the beginnig of CC mode charging. Will be followed by
* ln8411_charge_ccmode with which share some of the adjustments.
*/
static int ln8411_charge_adjust_ccmode(struct ln8411_charger *ln8411)
{
int iin, ccmode, vbatt, vin_vol;
int ret = 0;
mutex_lock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
ln8411_prlog_state(ln8411, __func__);
if (ln8411->charging_state != DC_STATE_ADJUST_CC)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_ADJUST_CC);
ln8411->charging_state = DC_STATE_ADJUST_CC;
ret = ln8411_check_error(ln8411);
if (ret != 0)
goto error; /*This is not active mode. */
ccmode = ln8411_check_status(ln8411);
if (ccmode < 0) {
ret = ccmode;
goto error;
}
switch(ccmode) {
case STS_MODE_IIN_LOOP:
case STS_MODE_CHG_LOOP: /* CHG_LOOP does't exist */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "End1: rx_vol=%u",
ln8411->ta_vol);
} else if (ln8411->ta_cur > LN8411_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "End2: ta_cur=%u, ta_vol=%u",
ln8411->ta_cur, ln8411->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "End3: ta_cur=%u, ta_vol=%u",
ln8411->ta_cur, ln8411->ta_vol);
}
ln8411->prev_inc = INC_NONE;
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CC_MODE);
/* Send PD Message and then go to CC mode */
ln8411->charging_state = DC_STATE_CC_MODE;
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
vbatt = ln8411_read_adc(ln8411, ADCCH_VBAT);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "End4: vbatt=%d, ta_vol=%u",
vbatt, ln8411->ta_vol);
/* Clear TA increment flag */
ln8411->prev_inc = INC_NONE;
/* Go to Pre-CV mode */
ln8411->timer_id = TIMER_ENTER_CVMODE;
ln8411->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
iin = ln8411_read_adc(ln8411, ADCCH_IIN);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"Inactive: iin=%d, iin_cc=%d, cc_max=%d",
iin, ln8411->iin_cc, ln8411->cc_max);
if (iin < 0)
break;
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
ret = ln8411_ajdust_ccmode_wireless(ln8411, iin);
} else {
ret = ln8411_ajdust_ccmode_wired(ln8411, iin);
}
if (ret < 0) {
dev_err(ln8411->dev, "%s: %d", __func__, ret);
} else {
ln8411->prev_iin = iin;
}
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = ln8411_read_adc(ln8411, ADCCH_VIN);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "VIN_UVLO: ta_vol=%u, vin_vol=%d",
ln8411->ta_cur, vin_vol);
/* Check VIN after 1sec */
ln8411->timer_id = TIMER_ADJUST_CCMODE;
ln8411->timer_period = 1000;
break;
default:
goto error;
}
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
error:
mutex_unlock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* <0 error, 0 no new limits, >0 new limits */
static int ln8411_apply_new_limits(struct ln8411_charger *ln8411)
{
int ret = 0;
if (ln8411->new_iin && ln8411->new_iin < ln8411->iin_cc) {
ret = ln8411_apply_new_iin(ln8411);
if (ret == 0)
ret = 1;
} else if (ln8411->new_vfloat) {
ret = ln8411_apply_new_vfloat(ln8411);
if (ret == 0)
ret = 1;
} else if (ln8411->new_iin) {
ret = ln8411_apply_new_iin(ln8411);
if (ret == 0)
ret = 1;
} else {
return 0;
}
return ret;
}
/* 2:1 Direct Charging CC MODE control */
static int ln8411_charge_ccmode(struct ln8411_charger *ln8411)
{
int ccmode = -1, vin_vol, iin, ret = 0;
dev_dbg(ln8411->dev, "%s: ======START======= \n", __func__);
mutex_lock(&ln8411->lock);
if (ln8411->charging_state != DC_STATE_CC_MODE)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CC_MODE);
ln8411->charging_state = DC_STATE_CC_MODE;
ln8411_prlog_state(ln8411, __func__);
ret = ln8411_check_error(ln8411);
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.
* ln8411_apply_new_limits() changes ln8411->charging_state to
* DC_STATE_ADJUST_TAVOL or DC_STATE_ADJUST_TACUR when new limits
* need to be applied.
*/
ret = ln8411_apply_new_limits(ln8411);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
ccmode = ln8411_check_status(ln8411);
if (ccmode < 0) {
ret = ccmode;
goto error_exit;
}
switch(ccmode) {
case STS_MODE_LOOP_INACTIVE:
/* Set input current compensation */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Need RX voltage compensation */
ret = ln8411_set_rx_voltage_comp(ln8411);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "INACTIVE1: rx_vol=%u",
ln8411->ta_vol);
} else {
const int ta_max_vol = ln8411->ta_max_vol;
int ta_max_vol_cp = 0;
if (ln8411->chg_mode == CHG_4TO1_DC_MODE)
ta_max_vol_cp = ln8411->pdata->ta_max_vol_4_1 * CHG_4TO1_DC_MODE;
else if (ln8411->chg_mode == CHG_2TO1_DC_MODE)
ta_max_vol_cp = ln8411->pdata->ta_max_vol_2_1 * CHG_2TO1_DC_MODE;
/* Check TA current with TA_MIN_CUR */
if (ln8411->ta_cur <= LN8411_TA_MIN_CUR) {
ln8411->ta_cur = LN8411_TA_MIN_CUR;
ret = ln8411_set_ta_voltage_comp(ln8411);
} else if (ta_max_vol >= ta_max_vol_cp) {
ret = ln8411_set_ta_current_comp(ln8411);
} else {
/* constant power mode */
ret = ln8411_set_ta_current_comp2(ln8411);
}
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"INACTIVE2: ta_cur=%u, ta_vol=%u",
ln8411->ta_cur,
ln8411->ta_vol);
}
break;
case STS_MODE_VFLT_LOOP:
/* TODO: adjust fv_uv here based on real vbatt */
iin = ln8411_read_adc(ln8411, ADCCH_IIN);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG, "CC VFLOAT: iin=%d", iin);
/* go to Pre-CV mode */
ln8411->timer_id = TIMER_ENTER_CVMODE;
ln8411->timer_period = 0;
break;
case STS_MODE_IIN_LOOP:
case STS_MODE_CHG_LOOP:
iin = ln8411_read_adc(ln8411, ADCCH_IIN);
if (iin < 0)
break;
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"IIN_LOOP1: iin=%d, next_rx_vol=%u",
iin, ln8411->ta_vol);
} else if (ln8411->ta_cur <= LN8411_TA_MIN_CUR) {
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"IIN_LOOP2: iin=%d, next_ta_vol=%u",
iin, ln8411->ta_vol);
} else {
/* Decrease TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"IIN_LOOP3: iin=%d, next_ta_cur=%u",
iin, ln8411->ta_cur);
}
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = ln8411_read_adc(ln8411, ADCCH_VIN);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
ln8411->ta_cur, ln8411->ta_vol, vin_vol);
/* Check VIN after 1sec */
ln8411->timer_id = TIMER_CHECK_CCMODE;
ln8411->timer_period = 1000;
break;
default:
break;
}
done:
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
error_exit:
mutex_unlock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: End, ccmode=%d timer_id=%d, timer_period=%lu ret=%d\n",
__func__, ccmode, ln8411->timer_id, ln8411->timer_period,
ret);
return ret;
}
/* Direct Charging Start CV MODE control - Pre CV MODE */
static int ln8411_charge_start_cvmode(struct ln8411_charger *ln8411)
{
int ret = 0;
int cvmode;
int vin_vol;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
mutex_lock(&ln8411->lock);
if (ln8411->charging_state != DC_STATE_START_CV)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_START_CV);
ln8411->charging_state = DC_STATE_START_CV;
/* Check the charging type */
ret = ln8411_check_error(ln8411);
if (ret != 0)
goto error_exit;
/* Check the status */
cvmode = ln8411_check_status(ln8411);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
switch(cvmode) {
case STS_MODE_CHG_LOOP:
case STS_MODE_IIN_LOOP:
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: rx_vol=%u",
__func__, ln8411->ta_vol);
} else {
/* Check TA current */
if (ln8411->ta_cur > LN8411_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_cur=%u",
__func__, ln8411->ta_cur);
} else {
/* TA current is less than 1.0A */
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_vol=%u",
__func__, ln8411->ta_vol);
}
}
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
/* Check the TA type */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: rx_vol=%u",
__func__, ln8411->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol -
LN8411_TA_VOL_STEP_PRE_CV *
ln8411->chg_mode;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: ta_vol=%u",
__func__, ln8411->ta_vol);
}
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
/* Exit Pre CV mode */
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV End: ta_vol=%u, ta_cur=%u",
__func__, ln8411->ta_vol, ln8411->ta_cur);
/* Need to implement notification to other driver */
/* To do here */
/* Go to CV mode */
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = ln8411_read_adc(ln8411, ADCCH_VIN);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: PreCV VIN_UVLO: ta_vol=%u, vin_vol=%u",
__func__, ln8411->ta_cur, vin_vol);
/* Check VIN after 1sec */
ln8411->timer_id = TIMER_ENTER_CVMODE;
ln8411->timer_period = 1000;
break;
default:
break;
}
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
error_exit:
mutex_unlock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int ln8411_check_eoc(struct ln8411_charger *ln8411)
{
const int eoc_tolerance = 25000; /* 25mV under max float voltage */
const int vlimit = LN8411_COMP_VFLOAT_MAX - eoc_tolerance;
int iin, vbat;
iin = ln8411_read_adc(ln8411, ADCCH_IIN);
if (iin < 0) {
dev_err(ln8411->dev, "%s: iin=%d\n", __func__, iin);
return iin;
}
vbat = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (vbat < 0) {
dev_err(ln8411->dev, "%s: vbat=%d\n", __func__, vbat);
return vbat;
}
dev_dbg(ln8411->dev, "%s: iin=%d, topoff=%u, vbat=%d vlimit=%d\n", __func__,
iin, ln8411->pdata->iin_topoff,
vbat, vlimit);
return iin < ln8411->pdata->iin_topoff && vbat >= vlimit;
}
/* Direct Charging CV MODE control */
static int ln8411_charge_cvmode(struct ln8411_charger *ln8411)
{
int ret = 0;
int cvmode;
int vin_vol;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
mutex_lock(&ln8411->lock);
if (ln8411->charging_state != DC_STATE_CV_MODE)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CV_MODE);
ln8411->charging_state = DC_STATE_CV_MODE;
ret = ln8411_check_error(ln8411);
if (ret != 0)
goto error_exit;
/*
* A change in vfloat and cc_max here is a normal tier transition, a
* change in iin means that the thermal engine has changed cc_max.
*/
ret = ln8411_apply_new_limits(ln8411);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
cvmode = ln8411_check_status(ln8411);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
if (cvmode == STS_MODE_LOOP_INACTIVE) {
ret = ln8411_check_eoc(ln8411);
if (ret < 0)
goto error_exit;
if (ret)
cvmode = STS_MODE_CHG_DONE;
}
switch(cvmode) {
case STS_MODE_CHG_DONE: {
const bool done_already = ln8411->charging_state ==
DC_STATE_CHARGING_DONE;
if (!done_already)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n",
__func__, ln8411->charging_state,
DC_STATE_CHARGING_DONE);
/* Keep CV mode until driver send stop charging */
ln8411->charging_state = DC_STATE_CHARGING_DONE;
power_supply_changed(ln8411->mains);
/* _cpm already came in */
if (ln8411->charging_state == DC_STATE_NO_CHARGING) {
dev_dbg(ln8411->dev, "%s: Already stop DC\n", __func__);
break;
}
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: done_already=%d charge Done\n", __func__,
done_already);
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = LN8411_CVMODE_CHECK_T;
} break;
case STS_MODE_CHG_LOOP:
case STS_MODE_IIN_LOOP:
/* Check the TA type */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX Voltage (100mV) */
ln8411->ta_vol = ln8411->ta_vol -
WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: rx_vol=%u",
__func__, ln8411->ta_vol);
/* Check TA current */
} else if (ln8411->ta_cur > LN8411_TA_MIN_CUR) {
/* TA current is higher than (1.0A*chg_mode) */
/* Decrease TA current (50mA) */
ln8411->ta_cur = ln8411->ta_cur -
PD_MSG_TA_CUR_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_cur=%u",
__func__, ln8411->ta_cur);
} else {
/* TA current is less than (1.0A*chg_mode) */
/* Decrease TA Voltage (20mV) */
ln8411->ta_vol = ln8411->ta_vol -
PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_vol=%u",
__func__, ln8411->ta_vol);
}
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
/* Check the TA type */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage */
ln8411->ta_vol = ln8411->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: rx_vol=%u",
__func__, ln8411->ta_vol);
} else {
/* Decrease TA voltage */
ln8411->ta_vol = ln8411->ta_vol - 2 * PD_MSG_TA_VOL_STEP;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: ta_vol=%u",
__func__, ln8411->ta_vol);
}
/* Send PD Message */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = LN8411_CVMODE_CHECK_T;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = ln8411_read_adc(ln8411, ADCCH_VIN);
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: CC VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
__func__, ln8411->ta_cur, ln8411->ta_vol,
vin_vol);
/* Check VIN after 1sec */
ln8411->timer_id = TIMER_CHECK_CVMODE;
ln8411->timer_period = 1000;
break;
default:
break;
}
done:
dev_dbg(ln8411->dev, "%s: reschedule next id=%d period=%ld chg_state=%d\n",
__func__, ln8411->timer_id, ln8411->timer_period,
ln8411->charging_state);
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
error_exit:
mutex_unlock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: End, ret=%d next\n", __func__, ret);
return ret;
}
static int ln8411_set_chg_mode_by_apdo(struct ln8411_charger *ln8411)
{
int ret;
/*
* Get the APDO max and set chg_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 = ln8411_get_apdo_max_power(ln8411, ln8411->pdata->ta_max_vol_4_1 * CHG_4TO1_DC_MODE,
LN8411_TA_MAX_CUR_4_1);
if (ret == 0) {
ln8411->chg_mode = CHG_4TO1_DC_MODE;
goto done;
}
dev_warn(ln8411->dev, "%s: No APDO to support 4:1 for %d, max_voltage: %d\n",
__func__, LN8411_TA_MAX_CUR_4_1, ln8411->pdata->ta_max_vol_4_1 * CHG_4TO1_DC_MODE);
ret = ln8411_get_apdo_max_power(ln8411, ln8411->pdata->ta_max_vol_2_1 * CHG_2TO1_DC_MODE,
LN8411_TA_MAX_CUR);
if (ret == 0) {
ln8411->chg_mode = CHG_2TO1_DC_MODE;
goto done;
}
dev_warn(ln8411->dev, "%s: No APDO to support 2:1 for %d, max_voltage: %d\n",
__func__, LN8411_TA_MAX_CUR, ln8411->pdata->ta_max_vol_2_1 * CHG_2TO1_DC_MODE);
ret = ln8411_get_apdo_max_power(ln8411, ln8411->pdata->ta_max_vol_2_1 * CHG_2TO1_DC_MODE, 0);
if (ret == 0) {
ln8411->chg_mode = CHG_2TO1_DC_MODE;
goto done;
}
dev_err(ln8411->dev, "%s: No APDO to support 2:1\n", __func__);
ln8411->chg_mode = CHG_NO_DC_MODE;
ln8411->ta_max_vol = 0;
done:
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 ln8411_preset_dcmode(struct ln8411_charger *ln8411)
{
int vbat;
int ret = 0, val;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
dev_dbg(ln8411->dev, "%s: = charging_state=%u == \n", __func__,
ln8411->charging_state);
/* gcpm set ->cc_max and ->fv_uv before starting */
if (ln8411->cc_max < 0 || ln8411->fv_uv < 0) {
dev_err(ln8411->dev, "%s: cc_max=%d fv_uv=%d invalid\n", __func__,
ln8411->cc_max, ln8411->fv_uv);
return -EINVAL;
}
if (ln8411->charging_state != DC_STATE_PRESET_DC)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_PRESET_DC);
ln8411->charging_state = DC_STATE_PRESET_DC;
/* VBAT is over threshold but it might be "bouncy" due to transitory */
vbat = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* v_float is set on start from GCPM */
if (vbat > ln8411->fv_uv) {
dev_err(ln8411->dev, "%s: vbat adc=%d is higher than VFLOAT=%d\n", __func__,
vbat, ln8411->fv_uv);
ret = -EINVAL;
goto error;
}
/* determined by ->cfg_iin and cc_max */
ln8411->ta_max_cur = ln8411_get_iin_max(ln8411, ln8411->cc_max);
dev_dbg(ln8411->dev, "%s: ta_max_cur=%u, iin_cfg=%u, ln8411->ta_type=%d\n",
__func__, ln8411->ta_max_cur, ln8411->pdata->iin_cfg,
ln8411->ta_type);
/* Integration guide V1.0 Section 5.1 */
/* validity check before start */
ret = regmap_read(ln8411->regmap, LN8411_CTRL1, &val);
if (ret || val) {
dev_info(ln8411->dev, "%s: validity check LN8411_CTRL1 failed\n", __func__);
ret = -EAGAIN;
goto error;
}
ret = regmap_read(ln8411->regmap, LN8411_ADC_CTRL, &val);
#ifdef POLL_ADC
if (ret || val != LN8411_ADC_EN) {
#else
if (ret || val != (LN8411_ADC_EN | LN8411_ADC_DONE_MASK)) {
#endif
dev_info(ln8411->dev, "%s: validity check LN8411_ADC_CTRL failed\n", __func__);
ret = -EAGAIN;
goto error;
}
/* Check the TA type and set the charging mode */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* Integration guide V1.0 Section 5.2 */
/* Set work mode */
ret = ln8411_set_mode(ln8411, ln8411->chg_mode);
if (ret)
goto error;
ret = ln8411_set_prot_by_chg_mode(ln8411);
if (ret)
goto error;
ret = regmap_write(ln8411->regmap, LN8411_CTRL1, LN8411_WPCGATE_EN);
if (ret)
goto error;
/*
* Set the RX max voltage to enough high value to find RX
* maximum voltage initially
*/
ln8411->ta_max_vol = LN8411_WCRX_MAX_VOL * ln8411->chg_mode;
/* Get the RX max current/voltage(RX_MAX_CUR/VOL) */
ret = ln8411_get_rx_max_power(ln8411);
if (ret < 0) {
dev_err(ln8411->dev, "%s: no RX voltage to support 4:1 (%d)\n",
__func__, ret);
ln8411->chg_mode = CHG_NO_DC_MODE;
goto error;
}
ret = ln8411_set_wireless_dc(ln8411, vbat);
if (ret < 0) {
dev_err(ln8411->dev, "%s: set wired failed (%d)\n", __func__, ret);
ln8411->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(ln8411, LOGLEVEL_INFO,
"Preset DC, rx_max_vol=%u, rx_max_cur=%u, rx_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
ln8411->ta_max_vol, ln8411->ta_max_cur, ln8411->ta_max_pwr,
ln8411->iin_cc, ln8411->chg_mode);
} else {
ret = ln8411_set_chg_mode_by_apdo(ln8411);
if (ret < 0) {
int ret1;
if (!ln8411->dc_avail)
ln8411->dc_avail = gvotable_election_get_handle(VOTABLE_DC_CHG_AVAIL);
if (ln8411->dc_avail) {
ret1 = gvotable_cast_int_vote(ln8411->dc_avail, REASON_DC_DRV, 0, 1);
if (ret1 < 0)
dev_err(ln8411->dev,
"Unable to cast vote for DC Chg avail (%d)\n",
ret1);
}
goto error;
}
/* Integration guide V1.0 Section 5.2 */
/* Set work mode */
ret = ln8411_set_mode(ln8411, ln8411->chg_mode);
if (ret)
goto error;
ret = ln8411_set_prot_by_chg_mode(ln8411);
if (ret)
goto error;
ret = regmap_write(ln8411->regmap, LN8411_CTRL1, LN8411_OVPGATE_EN);
if (ret)
goto error;
/*
* ->ta_max_cur is too high for startup, needs to target
* CC before hitting max current AND work to ta_max_cur
* from there.
*/
ret = ln8411_set_wired_dc(ln8411, vbat);
if (ret < 0) {
dev_err(ln8411->dev, "%s: set wired failed (%d)\n", __func__, ret);
ln8411->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(ln8411, LOGLEVEL_INFO,
"Preset DC, objpos=%d ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
ln8411->ta_objpos, ln8411->ta_max_vol, ln8411->ta_max_cur,
ln8411->ta_max_pwr, ln8411->iin_cc, ln8411->chg_mode);
}
error:
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Preset direct charging configuration and start charging */
static int ln8411_preset_config(struct ln8411_charger *ln8411)
{
int ret = 0;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
mutex_lock(&ln8411->lock);
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_PRESET_DC);
ln8411->charging_state = DC_STATE_PRESET_DC;
/* ->iin_cc and ->fv_uv are configured externally */
ret = ln8411_set_input_current(ln8411, ln8411->pdata->iin_cfg);
if (ret < 0)
goto error;
ret = ln8411_set_vfloat(ln8411, ln8411->fv_uv);
if (ret < 0)
goto error;
/* Enable LN8411 unless aready enabled */
ret = ln8411_set_charging(ln8411, true);
if (ret < 0)
goto error;
/* Clear previous iin adc */
ln8411->prev_iin = 0;
ln8411->prev_inc = INC_NONE;
/* Go to CHECK_ACTIVE state after 150ms, 300ms for wireless */
ln8411->timer_id = TIMER_CHECK_ACTIVE;
if (ln8411->ta_type == TA_TYPE_WIRELESS)
ln8411->timer_period = LN8411_ENABLE_WLC_DELAY_T;
else
ln8411->timer_period = LN8411_ENABLE_DELAY_T;
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
error:
mutex_unlock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* Check the charging status at start before entering the adjust cc mode or
* from ln8411_send_message() after a failure.
*/
static int ln8411_check_active_state(struct ln8411_charger *ln8411)
{
int ret = 0;
dev_dbg(ln8411->dev, "%s: ======START=======\n", __func__);
dev_dbg(ln8411->dev, "%s: = charging_state=%u == \n", __func__,
ln8411->charging_state);
mutex_lock(&ln8411->lock);
if (ln8411->charging_state != DC_STATE_CHECK_ACTIVE)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CHECK_ACTIVE);
ln8411->charging_state = DC_STATE_CHECK_ACTIVE;
ret = ln8411_check_error(ln8411);
if (ret == 0) {
/* LN8411 is active state */
ln8411->retry_cnt = 0;
ln8411->timer_id = TIMER_ADJUST_CCMODE;
ln8411->timer_period = 0;
} else {
goto exit_done;
}
exit_done:
if (ret) {
int ret1 = dump_all_regs(ln8411);
if (ret1)
dev_err(ln8411->dev, "%s: Error dumping regs (%d)\n", __func__, ret1);
}
/* Implement error handler function if it is needed */
if (ret < 0) {
logbuffer_prlog(ln8411, LOGLEVEL_ERR,
"%s: charging_state=%d, not active or error (%d)",
__func__, ln8411->charging_state, ret);
ln8411->timer_id = TIMER_ID_NONE;
ln8411->timer_period = 0;
}
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
mutex_unlock(&ln8411->lock);
return ret;
}
/* Enter direct charging algorithm */
static int ln8411_start_direct_charging(struct ln8411_charger *ln8411)
{
struct ln8411_chg_stats *chg_data = &ln8411->chg_data;
int ret;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
mutex_lock(&ln8411->lock);
/* configure DC charging type for the requested index */
ret = ln8411_set_ta_type(ln8411, ln8411->pps_index);
dev_info(ln8411->dev, "%s: Current ta_type=%d, chg_mode=%d\n", __func__,
ln8411->ta_type, ln8411->chg_mode);
if (ret < 0)
goto error_done;
/* wake lock */
__pm_stay_awake(ln8411->monitor_wake_lock);
/* Preset charging configuration and TA condition */
ret = ln8411_preset_dcmode(ln8411);
if (ret == 0) {
/* Configure the TA and start charging */
ln8411->timer_id = TIMER_PDMSG_SEND;
ln8411->timer_period = 0;
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
}
error_done:
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
ln8411_chg_stats_update(chg_data, ln8411);
mutex_unlock(&ln8411->lock);
return ret;
}
/* Check Vbat minimum level to start direct charging */
static int ln8411_check_vbatmin(struct ln8411_charger *ln8411)
{
int ret = 0, vbat;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
mutex_lock(&ln8411->lock);
if (ln8411->charging_state != DC_STATE_CHECK_VBAT)
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CHECK_VBAT);
ln8411->charging_state = DC_STATE_CHECK_VBAT;
if (ln8411->hw_init_done == false)
if (!ln8411_hw_init(ln8411))
ln8411->hw_init_done = true;
vbat = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* wait for hw init and CPM to send in the params */
if (ln8411->cc_max < 0 || ln8411->fv_uv < 0 || !ln8411->hw_init_done) {
dev_info(ln8411->dev, "%s: not yet fv_uv=%d, cc_max=%d vbat=%d, hw_init_done=%d\n",
__func__, ln8411->fv_uv, ln8411->cc_max, vbat, ln8411->hw_init_done);
/* retry again after 1sec */
ln8411->timer_id = TIMER_VBATMIN_CHECK;
ln8411->timer_period = LN8411_VBATMIN_CHECK_T;
ln8411->retry_cnt += 1;
} else {
logbuffer_prlog(ln8411, LOGLEVEL_INFO,
"%s: starts at fv_uv=%d, cc_max=%d vbat=%d (min=%d)",
__func__, ln8411->fv_uv, ln8411->cc_max, vbat,
LN8411_DC_VBAT_MIN);
ln8411->timer_id = TIMER_PRESET_DC;
ln8411->timer_period = 0;
ln8411->retry_cnt = 0; /* start charging */
}
/* timeout for VBATMIN or charging parameters */
if (ln8411->retry_cnt > LN8411_MAX_RETRY_CNT) {
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: TIMEOUT fv_uv=%d, cc_max=%d vbat=%d limit=%d",
__func__, ln8411->fv_uv, ln8411->cc_max, vbat,
LN8411_DC_VBAT_MIN);
ret = -ETIMEDOUT;
} else {
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
}
error:
mutex_unlock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int ln8411_send_message(struct ln8411_charger *ln8411)
{
int val, ret;
const int timer_id = ln8411->timer_id;
/* Go to the next state */
mutex_lock(&ln8411->lock);
dev_dbg(ln8411->dev, "%s: ====== START ======= \n", __func__);
/* Adjust TA current and voltage step */
if (ln8411->ta_type == TA_TYPE_WIRELESS) {
/* RX voltage resolution is 40mV */
val = ln8411->ta_vol / WCRX_VOL_STEP;
ln8411->ta_vol = val * WCRX_VOL_STEP;
/* Set RX voltage */
dev_dbg(ln8411->dev, "%s: ta_type=%d, ta_vol=%d\n", __func__,
ln8411->ta_type, ln8411->ta_vol);
ret = ln8411_send_rx_voltage(ln8411, WCRX_REQUEST_VOLTAGE);
} else {
/* PPS voltage resolution is 20mV */
val = ln8411->ta_vol / PD_MSG_TA_VOL_STEP;
ln8411->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* PPS current resolution is 50mA */
val = ln8411->ta_cur / PD_MSG_TA_CUR_STEP;
ln8411->ta_cur = val * PD_MSG_TA_CUR_STEP;
/* PPS minimum current is 1000mA */
if (ln8411->ta_cur < LN8411_TA_MIN_CUR)
ln8411->ta_cur = LN8411_TA_MIN_CUR;
dev_dbg(ln8411->dev, "%s: ta_type=%d, ta_vol=%d ta_cur=%d\n", __func__,
ln8411->ta_type, ln8411->ta_vol, ln8411->ta_cur);
/* Send PD Message */
ret = ln8411_send_pd_message(ln8411, PD_MSG_REQUEST_APDO);
}
switch (ln8411->charging_state) {
case DC_STATE_PRESET_DC:
ln8411->timer_id = TIMER_PRESET_CONFIG;
break;
case DC_STATE_ADJUST_CC:
ln8411->timer_id = TIMER_ADJUST_CCMODE;
break;
case DC_STATE_CC_MODE:
ln8411->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_START_CV:
ln8411->timer_id = TIMER_ENTER_CVMODE;
break;
case DC_STATE_CV_MODE:
ln8411->timer_id = TIMER_CHECK_CVMODE;
break;
case DC_STATE_ADJUST_TAVOL:
ln8411->timer_id = TIMER_ADJUST_TAVOL;
break;
case DC_STATE_ADJUST_TACUR:
ln8411->timer_id = TIMER_ADJUST_TACUR;
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0) {
dev_err(ln8411->dev, "%s: Error-send_pd_message to %d (%d)\n",
__func__, ln8411->ta_type, ret);
ln8411->timer_id = TIMER_CHECK_ACTIVE;
}
/* Ensure both TA voltage and current get set before enabling charging */
if (ln8411->timer_id == TIMER_PRESET_CONFIG)
ln8411->timer_period = LN8411_TA_CONFIG_WAIT_T;
else if (ln8411->ta_type == TA_TYPE_WIRELESS)
ln8411->timer_period = LN8411_PDMSG_WLC_WAIT_T;
else
ln8411->timer_period = LN8411_PDMSG_WAIT_T;
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: charging_state=%u timer_id:%d->%d ret=%d",
__func__, ln8411->charging_state,
timer_id, ln8411->timer_id, ret);
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
dev_dbg(ln8411->dev, "%s: End: timer_id=%d timer_period=%lu\n", __func__,
ln8411->timer_id, ln8411->timer_period);
mutex_unlock(&ln8411->lock);
return ret;
}
/* delayed work function for charging timer */
static void ln8411_timer_work(struct work_struct *work)
{
struct ln8411_charger *ln8411 =
container_of(work, struct ln8411_charger, timer_work.work);
unsigned int charging_state;
int timer_id;
int ret = 0;
dev_dbg(ln8411->dev, "%s: ========= START =========\n", __func__);
/* TODO: remove locks from the calls and run all of this locked */
mutex_lock(&ln8411->lock);
ln8411_chg_stats_update(&ln8411->chg_data, ln8411);
charging_state = ln8411->charging_state;
timer_id = ln8411->timer_id;
dev_dbg(ln8411->dev, "%s: timer id=%d, charging_state=%u\n", __func__,
ln8411->timer_id, charging_state);
mutex_unlock(&ln8411->lock);
switch (timer_id) {
/* charging_state <- DC_STATE_CHECK_VBAT */
case TIMER_VBATMIN_CHECK:
ret = ln8411_check_vbatmin(ln8411);
if (ret < 0)
goto error;
break;
/* charging_state <- DC_STATE_PRESET_DC */
case TIMER_PRESET_DC:
ret = ln8411_start_direct_charging(ln8411);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* preset configuration, start charging
*/
case TIMER_PRESET_CONFIG:
ret = ln8411_preset_config(ln8411);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* 150 ms after preset_config
*/
case TIMER_CHECK_ACTIVE:
ret = ln8411_check_active_state(ln8411);
if (ret < 0)
goto error;
break;
case TIMER_ADJUST_CCMODE:
ret = ln8411_charge_adjust_ccmode(ln8411);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CCMODE:
ret = ln8411_charge_ccmode(ln8411);
if (ret < 0)
goto error;
break;
case TIMER_ENTER_CVMODE:
/* Enter Pre-CV mode */
ret = ln8411_charge_start_cvmode(ln8411);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CVMODE:
ret = ln8411_charge_cvmode(ln8411);
if (ret < 0)
goto error;
break;
case TIMER_PDMSG_SEND:
ret = ln8411_send_message(ln8411);
if (ret < 0)
goto error;
break;
/* called from 2 contexts */
case TIMER_ADJUST_TAVOL:
mutex_lock(&ln8411->lock);
if (ln8411->ta_type == TA_TYPE_WIRELESS)
ret = ln8411_adjust_rx_voltage(ln8411);
else
ret = ln8411_adjust_ta_voltage(ln8411);
if (ret < 0) {
mutex_unlock(&ln8411->lock);
goto error;
}
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
mutex_unlock(&ln8411->lock);
break;
/* called from 2 contexts */
case TIMER_ADJUST_TACUR:
mutex_lock(&ln8411->lock);
ret = ln8411_adjust_ta_current(ln8411);
if (ret < 0) {
mutex_unlock(&ln8411->lock);
goto error;
}
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
mutex_unlock(&ln8411->lock);
break;
case TIMER_ID_NONE:
ret = ln8411_stop_charging(ln8411);
if (ret < 0)
goto error;
break;
default:
break;
}
/* Check the charging state again */
if (ln8411->charging_state == DC_STATE_NO_CHARGING) {
cancel_delayed_work(&ln8411->timer_work);
cancel_delayed_work(&ln8411->pps_work);
}
dev_dbg(ln8411->dev, "%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld\n",
__func__, timer_id, ln8411->timer_id, charging_state,
ln8411->charging_state, ln8411->timer_period);
return;
error:
dev_dbg(ln8411->dev, "%s: ========= ERROR =========\n", __func__);
logbuffer_prlog(ln8411, LOGLEVEL_ERR,
"%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld ret=%d",
__func__, timer_id, ln8411->timer_id, charging_state,
ln8411->charging_state, ln8411->timer_period, ret);
ln8411_stop_charging(ln8411);
}
/* delayed work function for resetting DC chip */
static void ln8411_init_hw_work(struct work_struct *work)
{
struct ln8411_charger *ln8411 = container_of(work,
struct ln8411_charger, init_hw_work.work);
int ret;
/* Integration guide V1.0 Section 4 */
ret = ln8411_hw_init(ln8411);
if (ret) {
dev_err(ln8411->dev, "Error initializing hw %d\n", ret);
goto error;
}
ln8411->hw_init_done = true;
error:
return;
}
/* delayed work function for pps periodic timer */
static void ln8411_pps_request_work(struct work_struct *work)
{
struct ln8411_charger *ln8411 = container_of(work,
struct ln8411_charger, pps_work.work);
int ret;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
dev_dbg(ln8411->dev, "%s: = charging_state=%u == \n", __func__,
ln8411->charging_state);
ret = ln8411_send_pd_message(ln8411, PD_MSG_REQUEST_APDO);
if (ret < 0)
dev_err(ln8411->dev, "%s: Error-send_pd_message\n", __func__);
/* TODO: do other background stuff */
dev_dbg(ln8411->dev, "%s: ret=%d\n", __func__, ret);
}
static int ln8411_soft_reset(struct ln8411_charger *ln8411)
{
int ret;
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_RESET);
if (ret)
return ret;
ret = regmap_set_bits(ln8411->regmap, LN8411_TEST_MODE_CTRL, LN8411_SOFT_RESET_REQ);
if (ret)
return ret;
msleep(50);
if (ln8411->chip_info.chip_rev == 1)
msleep(100);
/* No need to relock after reset */
return ret;
}
/* Caller must poll ADC_DONE_FLAG till ADC is enabled */
static int ln8411_cfg_adc(struct ln8411_charger *ln8411)
{
int ret;
/* Disable unused ADC channels */
ret = regmap_write(ln8411->regmap, LN8411_ADC_FN_DISABLE1, LN8411_VUSB_ADC_DIS
| LN8411_VWPC_ADC_DIS | LN8411_IBAT_ADC_DIS | LN8411_TSBAT_ADC_DIS);
if (ret)
return ret;
ret = regmap_set_bits(ln8411->regmap, LN8411_ADC_CTRL2, 0xC0);
#ifdef POLL_ADC
ret = regmap_update_bits(ln8411->regmap, LN8411_ADC_CTRL, 0xc9, LN8411_ADC_EN);
#else
ret = regmap_update_bits(ln8411->regmap, LN8411_ADC_CTRL, 0xc9,
LN8411_ADC_EN | LN8411_ADC_DONE_MASK);
#endif
if (ret)
return ret;
#ifndef POLL_ADC
msleep(350);
#endif
return ret;
}
/* Integration guide V1.0 Section 4 */
static int ln8411_hw_init(struct ln8411_charger *ln8411)
{
int ret;
#ifdef POLL_ADC
int retry = ADC_EN_RETRIES;
int adc_done;
#endif
/* Reset the chip - Integration guide V1.0 Section 4.1 */
dev_info(ln8411->dev, "%s: reset chip\n", __func__);
ret = ln8411_soft_reset(ln8411);
if (ret)
goto error_done;
if (ln8411->pdata->irq_gpio >= 0) {
ret = ln8411_irq_init(ln8411);
if (ret < 0)
dev_warn(ln8411->dev, "%s: failed to initialize IRQ: %d\n", __func__, ret);
else
disable_irq(ln8411->client->irq);
}
/* Integration guide V1.2 Section 4.2 */
dev_dbg(ln8411->dev, "%s: Enable TSBAT_EN_PIN\n", __func__);
ret = regmap_set_bits(ln8411->regmap, LN8411_CTRL4, LN8411_TSBAT_EN_PIN);
if (ret)
goto error_done;
/* Turn OFF both OVP and WPC gates to prevent wrong input detection */
dev_dbg(ln8411->dev, "%s: turn OFF gates\n", __func__);
ret = regmap_clear_bits(ln8411->regmap, LN8411_CTRL1, LN8411_OVPGATE_EN | LN8411_WPCGATE_EN);
if (ret)
goto error_done;
/* 685kHz, enable spread spectrum */
ret = regmap_update_bits(ln8411->regmap, LN8411_CTRL2, 0xfe, 0x9A);
if (ret)
goto error_done;
/* unlock private register space */
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_SW_OVERRIDE);
if (ret)
goto error_done;
ret = regmap_write(ln8411->regmap, LN8411_SC_DITHER_CTRL, 0x7F);
if (ret)
goto error_done;
dev_dbg(ln8411->dev, "%s: clear latched sts\n", __func__);
ret = regmap_set_bits(ln8411->regmap, LN8411_ADC_CFG_2, LN8411_CLEAR_LATCHED_STS);
if (ret)
goto error_done;
dev_dbg(ln8411->dev, "%s: set safety switch to 10V\n", __func__);
/* Set Safety switch drive for 10V Si FET */
ret = regmap_set_bits(ln8411->regmap, LN8411_OVPGATE_CTRL_0, LN8411_OVPFETDR_V_CFG);
if (ret)
goto error_done;
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_LOCK);
if (ret)
goto error_done;
/* Set protection thresholds */
ln8411->iin_reg = 0;
ln8411->vfloat_reg = 0;
dev_dbg(ln8411->dev, "%s: set_vbat_ovp\n", __func__);
ret = ln8411_set_vbat_ovp(ln8411, VBAT_OVP_DFT);
if (ret)
goto error_done;
dev_dbg(ln8411->dev, "%s: pmid2out ovp to 13%%\n", __func__);
ret = regmap_update_bits(ln8411->regmap, LN8411_PMID2OUT_OVP, 0x9f, 0x4);
if (ret)
goto error_done;
dev_dbg(ln8411->dev, "%s: clear int flags\n", __func__);
ret = regmap_set_bits(ln8411->regmap, LN8411_INT_MASK_2, LN8411_PAUSE_INT_UPDATE);
if (ret)
goto error_done;
ret = regmap_set_bits(ln8411->regmap, LN8411_INT_MASK_2, LN8411_CLEAR_INT);
if (ret)
goto error_done;
msleep(5);
ret = regmap_clear_bits(ln8411->regmap,LN8411_INT_MASK_2, LN8411_CLEAR_INT);
if (ret)
goto error_done;
ret = regmap_clear_bits(ln8411->regmap, LN8411_INT_MASK_2, LN8411_PAUSE_INT_UPDATE);
if (ret)
goto error_done;
/* Enable ADC */
dev_dbg(ln8411->dev, "%s: Enable ADC\n", __func__);
ret = ln8411_cfg_adc(ln8411);
if (ret) {
dev_info(ln8411->dev, "%s: Error configuring adc\n", __func__);
goto error_done;
}
#ifdef POLL_ADC
retry = ADC_EN_RETRIES;
do {
msleep(10);
retry--;
regmap_read(ln8411->regmap, LN8411_COMP_FLAG1, &adc_done);
adc_done &= LN8411_ADC_DONE_FLAG;
} while (retry && adc_done == 0);
if (!adc_done)
dev_err(ln8411->dev, "%s: Error enabling adc\n", __func__);
#endif
if (!ret)
dev_dbg(ln8411->dev, "HW init done");
error_done:
return ret;
}
static irqreturn_t ln8411_interrupt_handler(int irq, void *data)
{
struct ln8411_charger *ln8411 = data;
bool handled = true;
int ret;
unsigned int val;
ret = regmap_read(ln8411->regmap, LN8411_INT_FLAG, &val);
if (ret) {
dev_err(ln8411->dev, "%s: Error reading LN8411_INT_FLAG: %d\n",
__func__, ret);
goto exit_done;
}
dev_dbg(ln8411->dev, "%s: FLG %d\n", __func__, val);
ret = regmap_read(ln8411->regmap, LN8411_FAULT3_STS, &val);
if (val & LN8411_VBAT_ALARM_STS) {
dev_info(ln8411->dev, "%s: In VFLT LOOP\n", __func__);
}
if (val & LN8411_IBUS_ALARM_STS) {
dev_info(ln8411->dev, "%s: In IIN LOOP\n", __func__);
}
ret = regmap_read(ln8411->regmap, LN8411_INT_MASK, &val);
if (ret < 0) {
dev_err(ln8411->dev, "%s: Error reading interrupts enable: %d\n",
__func__, ret);
goto exit_done;
}
dev_dbg(ln8411->dev, "%s: Interrupt Mask: %d\n", __func__, val);
/* Clear the interrupts */
/* TODO */
exit_done:
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static int ln8411_irq_init(struct ln8411_charger *ln8411)
{
const struct ln8411_platform_data *pdata = ln8411->pdata;
int ret, irq;
irq = gpio_to_irq(pdata->irq_gpio);
ret = gpio_request_one(pdata->irq_gpio, GPIOF_IN, ln8411->client->name);
if (ret < 0)
goto fail;
ret = request_threaded_irq(irq, NULL, ln8411_interrupt_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
ln8411->client->name, ln8411);
if (ret < 0)
goto fail_gpio;
/* Mask all IRQ for the time being */
ret = regmap_clear_bits(ln8411->regmap, LN8411_INT_MASK, LN8411_VOUT_INSERT_MASK |
LN8411_VWPC_INSERT_MASK | LN8411_VUSB_INSERT_MASK);
if (ret)
goto fail_write;
ln8411->client->irq = irq;
return 0;
fail_write:
free_irq(irq, ln8411);
fail_gpio:
gpio_free(pdata->irq_gpio);
fail:
ln8411->client->irq = 0;
return ret;
}
/* Returns the input current limit programmed into the charger in uA. */
int ln8411_input_current_limit(struct ln8411_charger *ln8411)
{
if (!ln8411->mains_online)
return -ENODATA;
return ln8411->iin_reg;
}
/* Returns the constant charge current requested from GCPM */
static int get_const_charge_current(struct ln8411_charger *ln8411)
{
/* Charging current cannot be controlled directly */
return ln8411->cc_max;
}
/* Return the constant charge voltage programmed into the charger in uV. */
static int ln8411_const_charge_voltage(struct ln8411_charger *ln8411)
{
if (!ln8411->mains_online)
return -ENODATA;
return ln8411->vfloat_reg;
}
#define get_boot_sec() div_u64(ktime_to_ns(ktime_get_boottime()), NSEC_PER_SEC)
/* index is the PPS source to use */
static int ln8411_set_charging_enabled(struct ln8411_charger *ln8411, int index)
{
if (index < 0 || index >= PPS_INDEX_MAX)
return -EINVAL;
mutex_lock(&ln8411->lock);
/* Done is detected in CV when iin goes UNDER topoff. */
if (ln8411->charging_state == DC_STATE_CHARGING_DONE)
index = 0;
if (index == 0) {
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: stop pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, ln8411->pps_index, index,
ln8411->charging_state,
ln8411->timer_id);
/* this is the same as stop charging */
ln8411->pps_index = 0;
cancel_delayed_work(&ln8411->timer_work);
cancel_delayed_work(&ln8411->pps_work);
/* will call ln8411_stop_charging() in timer_work() */
ln8411->timer_id = TIMER_ID_NONE;
ln8411->timer_period = 0;
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
} else if (ln8411->charging_state == DC_STATE_NO_CHARGING) {
logbuffer_prlog(ln8411, LOGLEVEL_DEBUG,
"%s: start pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, ln8411->pps_index, index,
ln8411->charging_state,
ln8411->timer_id);
/* Start Direct Charging on Index */
ln8411->dc_start_time = get_boot_sec();
ln8411_chg_stats_init(&ln8411->chg_data);
ln8411->pps_index = index;
dev_info(ln8411->dev, "%s: charging_state=%u->%u\n", __func__,
ln8411->charging_state, DC_STATE_CHECK_VBAT);
/* PD is already in PE_SNK_STATE */
ln8411->charging_state = DC_STATE_CHECK_VBAT;
ln8411->timer_id = TIMER_VBATMIN_CHECK;
ln8411->timer_period = 0;
mod_delayed_work(ln8411->dc_wq, &ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
/* Set the initial charging step */
power_supply_changed(ln8411->mains);
}
mutex_unlock(&ln8411->lock);
return 0;
}
/* call holding mutex_lock(&ln8411->lock); */
static int ln8411_init_1_2_mode(struct ln8411_charger *ln8411)
{
int ret, ret1;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
if (ln8411->chg_mode != CHG_NO_DC_MODE) {
dev_info(ln8411->dev, "%s: chg_mode is not NO_DC_MODE. Not initing 1_2 mode=%d\n",
__func__, ln8411->chg_mode);
ret = -EINVAL;
goto error;
}
ln8411->chg_mode = CHG_1TO2_DC_MODE;
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_SW_OVERRIDE);
if (ret) {
dev_info(ln8411->dev, "%s: Error setting EN_SW_OVERRIDE (%d)\n", __func__, ret);
goto error;
}
ret = ln8411_set_mode(ln8411, CHG_1TO2_DC_MODE);
if (ret) {
dev_info(ln8411->dev, "%s: Error setting Rev 1:2 mode (%d)\n", __func__, ret);
goto error;
}
ret = regmap_clear_bits(ln8411->regmap, LN8411_CFG_1, LN8411_DEVICE_MODE);
if (ret) {
dev_info(ln8411->dev, "%s: Error clearing DEVICE_MODE (%d)\n", __func__, ret);
goto error;
}
ret =regmap_set_bits(ln8411->regmap, LN8411_REG_49, LN8411_REVERT_LSNS);
if (ret) {
dev_info(ln8411->dev, "%s: Error setting LSNS (%d)\n", __func__, ret);
goto error;
}
error:
ret1 = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_LOCK);
if (ret1) {
dev_info(ln8411->dev, "%s: Error locking private regs (%d)\n", __func__, ret1);
ret = ret1;
}
return ret;
}
/* call holding mutex_lock(&ln8411->lock); */
static int ln8411_enable_1_2_mode(struct ln8411_charger *ln8411)
{
int ret, ret1;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
ret = ln8411_set_prot_by_chg_mode(ln8411);
if (ret) {
dev_info(ln8411->dev, "%s: Error settings protections (%d)\n", __func__, ret);
goto error;
}
ret = ln8411_set_status_charging(ln8411);
if (ret) {
dev_info(ln8411->dev, "%s: Error starting charging (%d)\n", __func__, ret);
goto error;
}
msleep(200);
ret = ln8411_check_error(ln8411);
if (ret)
goto error;
/* Enable PMID2OUT_UVP */
ret = regmap_update_bits(ln8411->regmap, LN8411_PMID2OUT_UVP, 0x9f, PMID2OUT_UVP_DFT_EN_1_2);
if (ret) {
dev_info(ln8411->dev, "%s: Error enabling PMID2OUT_UVP (%d)\n", __func__, ret);
goto error;
}
ret = regmap_set_bits(ln8411->regmap, LN8411_CTRL1, LN8411_WPCGATE_EN);
if (ret) {
dev_info(ln8411->dev, "%s: Error enabling WPCGATE (%d)\n", __func__, ret);
goto error;
}
msleep(10);
ret = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_EN_SW_OVERRIDE);
if (ret) {
dev_info(ln8411->dev, "%s: Error setting EN_SW_OVERRIDE (%d)\n", __func__, ret);
goto error;
}
/* Enable WPC_UVP */
ret = regmap_write(ln8411->regmap, LN8411_LION_COMP_CTRL_2, 0x0);
if (ret) {
dev_info(ln8411->dev, "%s: Error enabling WPC_UVP (%d)\n", __func__, ret);
goto error;
}
ret = ln8411_check_error(ln8411);
if (ret)
goto error;
error:
ret1 = ln8411_set_lion_ctrl(ln8411, LN8411_LION_CTRL_LOCK);
if (ret1) {
dev_info(ln8411->dev, "%s: Error locking private regs (%d)\n", __func__, ret1);
ret = ret1;
}
return ret;
}
/* call holding mutex_lock(&ln8411->lock); */
static int ln8411_stop_1_2_mode(struct ln8411_charger *ln8411)
{
int ret, ret1;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
ret = regmap_clear_bits(ln8411->regmap, LN8411_CTRL1, LN8411_CP_EN);
if (ret < 0)
goto error;
msleep(60);
ret = regmap_clear_bits(ln8411->regmap, LN8411_CTRL1, LN8411_QB_EN);
if (ret < 0)
goto error;
ln8411->chg_mode = CHG_NO_DC_MODE;
error:
ln8411->hw_init_done = false;
ret1 = ln8411_hw_init(ln8411);
if (ret1 < 0) {
dev_info(ln8411->dev, "%s: Error initializing HW (%d)\n", __func__, ret1);
ret = ret1;
} else {
ln8411->hw_init_done = true;
}
return ret;
}
static int ln8411_start_1_2_mode(struct ln8411_charger *ln8411)
{
int ret, rc;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
mutex_lock(&ln8411->lock);
ret = ln8411_init_1_2_mode(ln8411);
if (ret) {
dev_info(ln8411->dev, "%s: Error initializing 1_2 mode (%d)\n", __func__, ret);
goto error;
}
ret = ln8411_enable_1_2_mode(ln8411);
if (ret) {
dev_info(ln8411->dev, "%s: Error enabling 1_2 mode (%d)\n", __func__, ret);
goto error;
}
error:
if (ret) {
rc = ln8411_stop_1_2_mode(ln8411);
if (rc)
dev_info(ln8411->dev, "%s: Error disabling 1_2 mode (%d)\n", __func__, ret);
}
mutex_unlock(&ln8411->lock);
return ret;
}
#if IS_ENABLED(CONFIG_GPIOLIB)
static int ln8411_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
return GPIOF_DIR_OUT;
}
static int ln8411_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
return 0;
}
static void ln8411_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{
struct ln8411_charger *ln8411 = gpiochip_get_data(chip);
int ret = 0;
switch (offset) {
case LN8411_GPIO_1_2_EN:
if (value) {
ret = ln8411_start_1_2_mode(ln8411);
} else {
mutex_lock(&ln8411->lock);
ret = ln8411_stop_1_2_mode(ln8411);
mutex_unlock(&ln8411->lock);
}
break;
default:
ret = -EINVAL;
break;
}
pr_debug("%s: GPIO offset=%d value=%d ret:%d\n", __func__,
offset, value, ret);
if (ret < 0)
dev_err(&ln8411->client->dev, "GPIO%d: value=%d ret:%d\n", offset, value, ret);
}
static void ln8411_gpio_init(struct ln8411_charger *ln8411)
{
ln8411->gpio.owner = THIS_MODULE;
ln8411->gpio.label = "ln8411_gpio";
ln8411->gpio.get_direction = ln8411_gpio_get_direction;
ln8411->gpio.get = ln8411_gpio_get;
ln8411->gpio.set = ln8411_gpio_set;
ln8411->gpio.base = -1;
ln8411->gpio.ngpio = LN8411_NUM_GPIOS;
ln8411->gpio.can_sleep = true;
}
#endif
static int ln8411_mains_set_property(struct power_supply *psy,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct ln8411_charger *ln8411 = power_supply_get_drvdata(psy);
int ret = 0;
dev_dbg(ln8411->dev, "%s: =========START=========\n", __func__);
dev_dbg(ln8411->dev, "%s: prop=%d, val=%d\n", __func__, prop, val->intval);
if (!ln8411->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
if (val->intval == 0) {
ret = ln8411_stop_charging(ln8411);
if (ret < 0)
dev_err(ln8411->dev, "%s: cannot stop charging (%d)\n",
__func__, ret);
ln8411->mains_online = false;
/* Reset DC Chg un-avail on disconnect */
if (!ln8411->dc_avail)
ln8411->dc_avail = gvotable_election_get_handle(VOTABLE_DC_CHG_AVAIL);
if (ln8411->dc_avail) {
ret = gvotable_cast_int_vote(ln8411->dc_avail,
REASON_DC_DRV, 1, 1);
if (ret < 0)
dev_err(ln8411->dev,
"Unable to cast vote for DC Chg avail (%d)\n",
ret);
}
} else if (ln8411->mains_online == false) {
ln8411->mains_online = true;
}
break;
/* TODO: locking is wrong */
case GBMS_PROP_CHARGING_ENABLED:
ret = ln8411_set_charging_enabled(ln8411, val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = ln8411_set_new_vfloat(ln8411, val->intval);
break;
/*
* dc charger 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 = ln8411_set_new_cc_max(ln8411, val->intval);
break;
/* CURRENT MAX, same as IIN is really only set by the algo */
case POWER_SUPPLY_PROP_CURRENT_MAX:
dev_dbg(ln8411->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(&ln8411->lock);
ret = ln8411_set_new_iin(ln8411, val->intval);
mutex_unlock(&ln8411->lock);
break;
case GBMS_PROP_CHARGE_DISABLE:
break;
default:
ret = -EINVAL;
break;
}
dev_dbg(ln8411->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int ln8411_mains_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct ln8411_charger *ln8411 = power_supply_get_drvdata(psy);
union gbms_charger_state chg_state;
int intval, rc, ret = 0;
if (!ln8411->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = ln8411->mains_online;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = ln8411_is_present(ln8411);
if (val->intval < 0)
val->intval = 0;
break;
case GBMS_PROP_CHARGE_DISABLE:
ret = ln8411_get_charging_enabled(ln8411);
if (ret < 0)
return ret;
val->intval = !ret;
break;
case GBMS_PROP_CHARGING_ENABLED:
ret = ln8411_get_charging_enabled(ln8411);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = ln8411_const_charge_voltage(ln8411);
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(ln8411);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = ln8411_input_current_limit(ln8411);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* return the output current - uA unit */
rc = ln8411_get_iin(ln8411, &val->intval);
if (rc < 0)
dev_err(ln8411->dev, "Invalid IIN ADC (%d)\n", rc);
break;
case GBMS_PROP_CHARGE_CHARGER_STATE:
ret = ln8411_get_chg_chgr_state(ln8411, &chg_state);
if (ret < 0)
return ret;
gbms_propval_int64val(val) = chg_state.v;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
intval = ln8411_read_adc(ln8411, ADCCH_VOUT);
if (intval < 0)
return intval;
val->intval = intval;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
intval = ln8411_read_adc(ln8411, ADCCH_VBAT);
if (intval < 0)
return intval;
val->intval = intval;
break;
/* TODO: read NTC temperature? */
case POWER_SUPPLY_PROP_TEMP:
val->intval = ln8411_read_adc(ln8411, ADCCH_DIETEMP);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = ln8411_get_charge_type(ln8411);
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = ln8411_get_status(ln8411);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = ln8411_input_current_limit(ln8411);
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 ln8411_mains_properties[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_TEMP,
/* same as POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT */
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_STATUS,
};
static int ln8411_mains_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_CURRENT_MAX:
case GBMS_PROP_CHARGE_DISABLE:
return 1;
default:
break;
}
return 0;
}
static const struct power_supply_desc ln8411_mains_desc = {
.name = "dc-mains",
/* b/179246019 will not look online to Android */
.type = POWER_SUPPLY_TYPE_UNKNOWN,
.get_property = ln8411_mains_get_property,
.set_property = ln8411_mains_set_property,
.properties = ln8411_mains_properties,
.property_is_writeable = ln8411_mains_is_writeable,
.num_properties = ARRAY_SIZE(ln8411_mains_properties),
};
#if IS_ENABLED(CONFIG_OF)
static int of_ln8411_dt(struct device *dev,
struct ln8411_platform_data *pdata)
{
struct device_node *np_ln8411 = dev->of_node;
int ret;
if(!np_ln8411)
return -EINVAL;
/* irq gpio */
pdata->irq_gpio = of_get_named_gpio(np_ln8411, "ln8411,irq-gpio", 0);
dev_info(dev, "irq-gpio: %d \n", pdata->irq_gpio);
/* input current limit */
ret = of_property_read_u32(np_ln8411, "ln8411,input-current-limit",
&pdata->iin_cfg_max);
if (ret) {
dev_warn(dev, "ln8411,input-current-limit is Empty\n");
pdata->iin_cfg_max = LN8411_IIN_CFG_DFT;
}
pdata->iin_cfg = pdata->iin_cfg_max;
dev_info(dev, "ln8411,iin_cfg is %u\n", pdata->iin_cfg);
/* TA max voltage limit */
ret = of_property_read_u32(np_ln8411, "ln8411,ta-max-vol-4_1",
&pdata->ta_max_vol_4_1);
if (ret) {
dev_warn(dev, "ln8411,ta-max-vol-4_1 is Empty\n");
pdata->ta_max_vol_4_1 = LN8411_TA_MAX_VOL;
}
ret = of_property_read_u32(np_ln8411, "ln8411,ta-max-vol-2_1",
&pdata->ta_max_vol_2_1);
if (ret) {
dev_warn(dev, "ln8411,ta-max-vol_2_1 is Empty\n");
pdata->ta_max_vol_2_1 = LN8411_TA_MAX_VOL_2_1;
}
/* charging float voltage */
ret = of_property_read_u32(np_ln8411, "ln8411,float-voltage",
&pdata->v_float_dt);
if (ret) {
dev_warn(dev, "ln8411,float-voltage is Empty\n");
pdata->v_float_dt = LN8411_VFLOAT_DFT;
}
pdata->v_float = pdata->v_float_dt;
dev_info(dev, "ln8411,v_float is %u\n", pdata->v_float);
/* input topoff current */
ret = of_property_read_u32(np_ln8411, "ln8411,input-itopoff",
&pdata->iin_topoff);
if (ret) {
dev_warn(dev, "ln8411,input-itopoff is Empty\n");
pdata->iin_topoff = LN8411_IIN_DONE_DFT;
}
dev_info(dev, "ln8411,iin_topoff is %u\n", pdata->iin_topoff);
/* iin offsets */
ret = of_property_read_u32(np_ln8411, "ln8411,iin-max-offset",
&pdata->iin_max_offset);
if (ret)
pdata->iin_max_offset = LN8411_IIN_MAX_OFFSET;
dev_info(dev, "ln8411,iin_max_offset is %u\n", pdata->iin_max_offset);
ret = of_property_read_u32(np_ln8411, "ln8411,iin-cc_comp-offset",
&pdata->iin_cc_comp_offset);
if (ret)
pdata->iin_cc_comp_offset = LN8411_IIN_CC_COMP_OFFSET;
dev_info(dev, "ln8411,iin_cc_comp_offset is %u\n", pdata->iin_cc_comp_offset);
#if IS_ENABLED(CONFIG_THERMAL)
/* USBC thermal zone */
ret = of_property_read_string(np_ln8411, "google,usb-port-tz-name",
&pdata->usb_tz_name);
if (ret) {
dev_info(dev, "google,usb-port-tz-name is Empty\n");
pdata->usb_tz_name = NULL;
} else {
dev_info(dev, "google,usb-port-tz-name is %s\n", pdata->usb_tz_name);
}
#endif
return 0;
}
#else
static int of_ln8411_dt(struct device *dev,
struct ln8411_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_THERMAL)
static int ln8411_usb_tz_read_temp(struct thermal_zone_device *tzd, int *temp)
{
struct ln8411_charger *ln8411 = tzd->devdata;
if (!ln8411)
return -ENODEV;
*temp = ln8411_read_adc(ln8411, ADCCH_DIETEMP);
return 0;
}
static struct thermal_zone_device_ops ln8411_usb_tzd_ops = {
.get_temp = ln8411_usb_tz_read_temp,
};
#endif
static int debug_apply_offsets(void *data, u64 val)
{
struct ln8411_charger *chip = data;
int ret;
ret = ln8411_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, "%#02llx\n");
static int debug_adc_chan_get(void *data, u64 *val)
{
struct ln8411_charger *ln8411 = data;
*val = ln8411_read_adc(data, ln8411->debug_adc_channel);
return 0;
}
static int debug_adc_chan_set(void *data, u64 val)
{
struct ln8411_charger *ln8411 = data;
if (val < ADCCH_VOUT || val >= ADCCH_MAX)
return -EINVAL;
ln8411->debug_adc_channel = val;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_adc_chan_ops, debug_adc_chan_get,
debug_adc_chan_set, "%llu\n");
static int debug_pps_index_get(void *data, u64 *val)
{
struct ln8411_charger *ln8411 = data;
*val = ln8411->pps_index;
return 0;
}
static int debug_pps_index_set(void *data, u64 val)
{
struct ln8411_charger *ln8411 = data;
return ln8411_set_charging_enabled(ln8411, (int)val);
}
DEFINE_SIMPLE_ATTRIBUTE(debug_pps_index_ops, debug_pps_index_get,
debug_pps_index_set, "%llu\n");
static ssize_t chg_stats_show(struct device *dev, struct device_attribute *attr,
char *buff)
{
struct i2c_client *client = to_i2c_client(dev);
struct ln8411_charger *ln8411 = i2c_get_clientdata(client);
struct ln8411_chg_stats *chg_data = &ln8411->chg_data;
const int max_size = PAGE_SIZE;
int len = -ENODATA;
mutex_lock(&ln8411->lock);
if (!ln8411_chg_stats_valid(chg_data))
goto exit_done;
len = scnprintf(buff, max_size,
"D:%#x,%#x %#x,%#x,%#x,%#x,%#x\n",
chg_data->adapter_capabilities[0],
chg_data->adapter_capabilities[1],
chg_data->receiver_state[0],
chg_data->receiver_state[1],
chg_data->receiver_state[2],
chg_data->receiver_state[3],
chg_data->receiver_state[4]);
len += scnprintf(&buff[len], max_size - len,
"N: ovc=%d,ovc_ibatt=%d,ovc_delta=%d rcp=%d,stby=%d\n",
chg_data->ovc_count, chg_data->ovc_max_ibatt, chg_data->ovc_max_delta,
chg_data->rcp_count,
chg_data->stby_count);
len += scnprintf(&buff[len], max_size - len,
"C: nc=%d,pre=%d,ca=%d,cc=%d,cv=%d,adj=%d\n",
chg_data->nc_count,
chg_data->pre_count,
chg_data->ca_count,
chg_data->cc_count,
chg_data->cv_count,
chg_data->adj_count);
exit_done:
mutex_unlock(&ln8411->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 ln8411_charger *ln8411 = i2c_get_clientdata(client);
mutex_lock(&ln8411->lock);
ln8411_chg_stats_init(&ln8411->chg_data);
mutex_unlock(&ln8411->lock);
return count;
}
static DEVICE_ATTR_RW(chg_stats);
static ssize_t registers_dump_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct ln8411_charger *ln8411 = dev_get_drvdata(dev);
u8 tmp[0x9c - LN8411_DEVICE_ID + 1];
int ret = 0, i;
int len = 0;
ret = regmap_bulk_read(ln8411->regmap, LN8411_DEVICE_ID, &tmp, sizeof(tmp));
if (ret < 0)
return ret;
for (i = 0; i < sizeof(tmp); i++)
len += scnprintf(&buf[len], PAGE_SIZE - len, "%02x: %02x\n", i, tmp[i]);
return len;
}
static DEVICE_ATTR_RO(registers_dump);
static ssize_t soft_reset_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ln8411_charger *ln8411 = dev_get_drvdata(dev);
int ret;
ln8411->hw_init_done = false;
ret = ln8411_hw_init(ln8411);
if (!ret)
ln8411->hw_init_done = true;
return count;
}
static DEVICE_ATTR_WO(soft_reset);
static int ln8411_create_fs_entries(struct ln8411_charger *chip)
{
device_create_file(chip->dev, &dev_attr_chg_stats);
device_create_file(chip->dev, &dev_attr_registers_dump);
device_create_file(chip->dev, &dev_attr_soft_reset);
chip->debug_root = debugfs_create_dir("charger-ln8411", NULL);
if (IS_ERR_OR_NULL(chip->debug_root)) {
dev_err(chip->dev, "Couldn't create debug dir\n");
return -ENOENT;
}
debugfs_create_bool("wlc_rampout_iin", 0644, chip->debug_root,
&chip->wlc_ramp_out_iin);
debugfs_create_u32("wlc_rampout_delay", 0644, chip->debug_root,
&chip->wlc_ramp_out_delay);
debugfs_create_u32("wlc_rampout_vout_target", 0644, chip->debug_root,
&chip->wlc_ramp_out_vout_target);
debugfs_create_u32("debug_level", 0644, chip->debug_root,
&debug_printk_prlog);
debugfs_create_u32("no_logbuffer", 0644, chip->debug_root,
&debug_no_logbuffer);
debugfs_create_file("data", 0644, chip->debug_root, chip, &register_debug_ops_ln8411);
debugfs_create_x32("address", 0644, chip->debug_root, &chip->debug_address);
debugfs_create_file("1_2_mode", 0664, chip->debug_root, chip, &ln8411_1_2_mode_ops);
debugfs_create_u32("iin_max_offset", 0644, chip->debug_root,
&chip->pdata->iin_max_offset);
debugfs_create_u32("iin_cc_comp_offset", 0644, chip->debug_root,
&chip->pdata->iin_cc_comp_offset);
debugfs_create_file("apply_offsets", 0644, chip->debug_root, chip,
&apply_offsets_debug_ops);
chip->debug_adc_channel = ADCCH_VOUT;
debugfs_create_file("adc_chan", 0644, chip->debug_root, chip,
&debug_adc_chan_ops);
debugfs_create_file("pps_index", 0644, chip->debug_root, chip,
&debug_pps_index_ops);
return 0;
}
static int ln8411_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
static char *battery[] = { "ln8411-battery" };
struct power_supply_config mains_cfg = {};
struct ln8411_platform_data *pdata;
struct ln8411_charger *ln8411_charger;
struct device *dev = &client->dev;
const char *psy_name = NULL;
int ret;
dev_dbg(dev, "%s: =========START=========\n", __func__);
ln8411_charger = devm_kzalloc(dev, sizeof(*ln8411_charger), GFP_KERNEL);
if (!ln8411_charger)
return -ENOMEM;
#if IS_ENABLED(CONFIG_OF)
if (client->dev.of_node) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct ln8411_platform_data),
GFP_KERNEL);
if (!pdata)
return -ENOMEM;
ret = of_ln8411_dt(&client->dev, pdata);
if (ret < 0){
dev_err(&client->dev, "Failed to get device of_node \n");
return -ENOMEM;
}
client->dev.platform_data = pdata;
} else {
pdata = client->dev.platform_data;
}
#else
pdata = dev->platform_data;
#endif
if (!pdata)
return -EINVAL;
i2c_set_clientdata(client, ln8411_charger);
ln8411_charger->client = client;
ln8411_charger->regmap = devm_regmap_init_i2c(client, &ln8411_regmap);
if (IS_ERR(ln8411_charger->regmap)) {
dev_err(&client->dev, "ERROR: Cannot probe i2c!\n");
return -EINVAL;
}
ret = get_chip_info(ln8411_charger);
if (ret) {
dev_err(&client->dev, "ERROR: Cannot read chip info!\n");
return -ENODEV;
}
mutex_init(&ln8411_charger->lock);
ln8411_charger->dev = &client->dev;
ln8411_charger->pdata = pdata;
ln8411_charger->charging_state = DC_STATE_NO_CHARGING;
ln8411_charger->wlc_ramp_out_iin = true;
ln8411_charger->wlc_ramp_out_vout_target = 15300000; /* 15.3V as default */
ln8411_charger->wlc_ramp_out_delay = 300; /* 300 ms default */
ln8411_charger->hw_init_done = false;
/* Create a work queue for the direct charger */
ln8411_charger->dc_wq = alloc_ordered_workqueue("ln8411_dc_wq", WQ_MEM_RECLAIM);
if (ln8411_charger->dc_wq == NULL) {
dev_err(ln8411_charger->dev, "failed to create work queue\n");
mutex_destroy(&ln8411_charger->lock);
return -ENOMEM;
}
ln8411_charger->monitor_wake_lock =
wakeup_source_register(NULL, "ln8411-charger-monitor");
if (!ln8411_charger->monitor_wake_lock) {
dev_err(dev, "Failed to register wakeup source\n");
destroy_workqueue(ln8411_charger->dc_wq);
mutex_destroy(&ln8411_charger->lock);
return -ENODEV;
}
/* initialize work */
INIT_DELAYED_WORK(&ln8411_charger->timer_work, ln8411_timer_work);
ln8411_charger->timer_id = TIMER_ID_NONE;
ln8411_charger->timer_period = 0;
INIT_DELAYED_WORK(&ln8411_charger->pps_work, ln8411_pps_request_work);
INIT_DELAYED_WORK(&ln8411_charger->init_hw_work, ln8411_init_hw_work);
ret = of_property_read_string(dev->of_node,
"ln8411,psy_name", &psy_name);
ret = ln8411_probe_pps(ln8411_charger);
if (ret < 0) {
dev_warn(dev, "ln8411: PPS not available (%d)\n", ret);
} else {
const char *logname = "ln8411";
ln8411_charger->log = logbuffer_register(logname);
if (IS_ERR(ln8411_charger->log)) {
dev_err(dev, "no logbuffer (%ld)\n", PTR_ERR(ln8411_charger->log));
ln8411_charger->log = NULL;
}
}
schedule_delayed_work(&ln8411_charger->init_hw_work, 0);
mains_cfg.supplied_to = battery;
mains_cfg.num_supplicants = ARRAY_SIZE(battery);
mains_cfg.drv_data = ln8411_charger;
ln8411_charger->mains = devm_power_supply_register(dev,
&ln8411_mains_desc,
&mains_cfg);
if (IS_ERR(ln8411_charger->mains)) {
ret = -ENODEV;
goto error;
}
ln8411_charger->attrs.attrs = ln8411_attr_group;
ret = ln8411_create_fs_entries(ln8411_charger);
if (ret < 0)
dev_err(dev, "error while registering debugfs %d\n", ret);
#if IS_ENABLED(CONFIG_GPIOLIB)
ln8411_gpio_init(ln8411_charger);
ln8411_charger->gpio.parent = &client->dev;
ln8411_charger->gpio.of_node = of_find_node_by_name(client->dev.of_node,
ln8411_charger->gpio.label);
if (!ln8411_charger->gpio.of_node)
dev_err(&client->dev, "Failed to find %s DT node\n", ln8411_charger->gpio.label);
ret = devm_gpiochip_add_data(&client->dev, &ln8411_charger->gpio, ln8411_charger);
dev_info(&client->dev, "%d GPIOs registered ret: %d\n", ln8411_charger->gpio.ngpio, ret);
#endif
#if IS_ENABLED(CONFIG_THERMAL)
if (pdata->usb_tz_name) {
ln8411_charger->usb_tzd =
thermal_zone_device_register(pdata->usb_tz_name, 0, 0,
ln8411_charger,
&ln8411_usb_tzd_ops,
NULL, 0, 0);
if (IS_ERR(ln8411_charger->usb_tzd)) {
ln8411_charger->usb_tzd = NULL;
ret = PTR_ERR(ln8411_charger->usb_tzd);
dev_err(dev, "Couldn't register usb connector thermal zone ret=%d\n",
ret);
}
}
#endif
ln8411_charger->dc_avail = NULL;
ln8411_charger->init_done = true;
dev_info(dev, "ln8411: probe_done\n");
return 0;
error:
destroy_workqueue(ln8411_charger->dc_wq);
mutex_destroy(&ln8411_charger->lock);
wakeup_source_unregister(ln8411_charger->monitor_wake_lock);
return ret;
}
static int ln8411_remove(struct i2c_client *client)
{
struct ln8411_charger *ln8411_charger = i2c_get_clientdata(client);
/* stop charging if it is active */
ln8411_stop_charging(ln8411_charger);
if (client->irq) {
free_irq(client->irq, ln8411_charger);
gpio_free(ln8411_charger->pdata->irq_gpio);
}
destroy_workqueue(ln8411_charger->dc_wq);
wakeup_source_unregister(ln8411_charger->monitor_wake_lock);
#if IS_ENABLED(CONFIG_THERMAL)
if (ln8411_charger->usb_tzd)
thermal_zone_device_unregister(ln8411_charger->usb_tzd);
#endif
if (ln8411_charger->log)
logbuffer_unregister(ln8411_charger->log);
pps_free(&ln8411_charger->pps_data);
return 0;
}
static const struct i2c_device_id ln8411_id[] = {
{ "LN8411", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ln8411_id);
#if IS_ENABLED(CONFIG_OF)
static struct of_device_id ln8411_dt_ids[] = {
{ .compatible = "ln8411",},
{ },
};
MODULE_DEVICE_TABLE(of, ln8411_dt_ids);
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_PM)
#if IS_ENABLED(CONFIG_RTC_HCTOSYS)
static int get_current_time(struct ln8411_charger *ln8411, 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) {
dev_err(ln8411->dev, "%s: unable to open rtc device (%s)\n",
__FILE__, CONFIG_RTC_HCTOSYS_DEVICE);
return -EINVAL;
}
rc = rtc_read_time(rtc, &tm);
if (rc) {
dev_err(ln8411->dev, "Error reading rtc device (%s) : %d\n",
CONFIG_RTC_HCTOSYS_DEVICE, rc);
goto close_time;
}
rc = rtc_valid_tm(&tm);
if (rc) {
dev_err(ln8411->dev, "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
ln8411_check_and_update_charging_timer(struct ln8411_charger *ln8411)
{
unsigned long current_time = 0, next_update_time, time_left;
get_current_time(ln8411, &current_time);
if (ln8411->timer_id != TIMER_ID_NONE) {
next_update_time = ln8411->last_update_time +
(ln8411->timer_period / 1000); /* seconds */
dev_dbg(ln8411->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(&ln8411->lock);
ln8411->timer_period = time_left * 1000; /* ms unit */
mutex_unlock(&ln8411->lock);
schedule_delayed_work(&ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
dev_dbg(ln8411->dev, "%s: timer_id=%d, time_period=%ld\n", __func__,
ln8411->timer_id, ln8411->timer_period);
}
ln8411->last_update_time = current_time;
}
#endif
static int ln8411_suspend(struct device *dev)
{
struct ln8411_charger *ln8411 = dev_get_drvdata(dev);
dev_dbg(ln8411->dev, "%s: cancel delayed work\n", __func__);
/* cancel delayed_work */
cancel_delayed_work(&ln8411->timer_work);
return 0;
}
static int ln8411_resume(struct device *dev)
{
struct ln8411_charger *ln8411 = dev_get_drvdata(dev);
dev_dbg(ln8411->dev, "%s: update_timer\n", __func__);
/* Update the current timer */
#if IS_ENABLED(CONFIG_RTC_HCTOSYS)
ln8411_check_and_update_charging_timer(ln8411);
#else
if (ln8411->timer_id != TIMER_ID_NONE) {
mutex_lock(&ln8411->lock);
ln8411->timer_period = 0; /* ms unit */
mutex_unlock(&ln8411->lock);
schedule_delayed_work(&ln8411->timer_work,
msecs_to_jiffies(ln8411->timer_period));
}
#endif
return 0;
}
#else
#define ln8411_suspend NULL
#define ln8411_resume NULL
#endif
static const struct dev_pm_ops ln8411_pm_ops = {
.suspend = ln8411_suspend,
.resume = ln8411_resume,
};
static struct i2c_driver ln8411_driver = {
.driver = {
.name = "LN8411",
#if IS_ENABLED(CONFIG_OF)
.of_match_table = ln8411_dt_ids,
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_PM)
.pm = &ln8411_pm_ops,
#endif
},
.probe = ln8411_probe,
.remove = ln8411_remove,
.id_table = ln8411_id,
};
module_i2c_driver(ln8411_driver);
MODULE_AUTHOR("Prasanna Prapancham <prapancham@google.com>");
MODULE_DESCRIPTION("LN8411 Charger Pump Driver");
MODULE_LICENSE("GPL");