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android / kernel / google-modules / bms / c9fa87847fde666c1031ca48fe96f0fc76d912b1 / . / wc68_driver.c
blob: 9be88688644563ac423d2197d98fe91c0002aa5b [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for ST WC68 Direct charger
* Based on sample linux driver for ST WLC98 from ST
* and 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 "wc68_regs.h"
#include "wc68_charger.h"
#if IS_ENABLED(CONFIG_OF)
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#endif /* CONFIG_OF */
/* Timer definition */
#define WC68_VBATMIN_CHECK_T 1000 /* 1000ms */
#define WC68_CCMODE_CHECK1_T 5000 /* 10000ms -> 500ms */
#define WC68_CCMODE_CHECK2_T 5000 /* 5000ms */
#define WC68_CVMODE_CHECK_T 10000 /* 10000ms */
#define WC68_ENABLE_DELAY_T 150 /* 150ms */
#define WC68_CVMODE_CHECK2_T 1000 /* 1000ms */
#define WC68_ENABLE_WLC_DELAY_T 300 /* 300ms */
/* Battery Threshold */
#define WC68_DC_VBAT_MIN 3400000 /* uV */
/* Input Current Limit default value */
#define WC68_IIN_CFG_DFT 2500000 /* uA*/
/* Charging Float Voltage default value */
#define WC68_VFLOAT_DFT 4350000 /* uV */
/* Charging Float Voltage max voltage for comp */
#define WC68_COMP_VFLOAT_MAX 4700000 /* uV */
/* Charging Done Condition */
#define WC68_IIN_DONE_DFT 500000 /* uA */
/* parallel charging done conditoin */
#define WC68_IIN_P_DONE 1000000 /* uA */
/* Parallel charging default threshold */
#define WC68_IIN_P_TH_DFT 4000000 /* uA */
/* Single charging default threshold */
#define WC68_IIN_S_TH_DFT 10000000 /* uA */
/* Maximum TA voltage threshold */
#define WC68_TA_MAX_VOL 10250000 /* uV */
/* Maximum TA current threshold, set to max(cc_max) / 2 */
#define WC68_TA_MAX_CUR 2600000 /* uA */
#define WC68_TA_MAX_CUR_4_1 2250000 /* uA */
/* Minimum TA current threshold */
#define WC68_TA_MIN_CUR 1000000 /* uA - PPS minimum current */
/* Minimum TA voltage threshold in Preset mode */
#define WC68_TA_MIN_VOL_PRESET 8000000 /* uV */
/* TA voltage threshold starting Adjust CC mode */
#define WC68_TA_MIN_VOL_CCADJ 8500000 /* 8000000uV --> 8500000uV */
#define WC68_TA_VOL_PRE_OFFSET 500000 /* uV */
/* Adjust CC mode TA voltage step */
#define WC68_TA_VOL_STEP_ADJ_CC 40000 /* uV */
/* Pre CV mode TA voltage step */
#define WC68_TA_VOL_STEP_PRE_CV 20000 /* uV */
/* IIN_CC adc offset for accuracy */
#define WC68_IIN_ADC_OFFSET 20000 /* uA */
/* IIN_CC compensation offset */
#define WC68_IIN_CC_COMP_OFFSET 25000 /* uA */
/* IIN_CC compensation offset in Power Limit Mode(Constant Power) TA */
#define WC68_IIN_CC_COMP_OFFSET_CP 20000 /* uA */
/* TA maximum voltage that can support CC in Constant Power Mode */
#define WC68_TA_MAX_VOL_CP 10250000
/* Offset for cc_max / 2 */
#define WC68_IIN_MAX_OFFSET 0
/* maximum retry counter for restarting charging */
#define WC68_MAX_RETRY_CNT 3 /* retries */
/* TA IIN tolerance */
#define WC68_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 WC68_WCRX_MAX_VOL 9750000 /* uV */
/* WCRX voltage Step */
#define WCRX_VOL_STEP 100000 /* uV */
/* irdrop default limit */
#define WC68_IRDROP_LIMIT_CNT 3 /* tiers */
#define WC68_IRDROP_LIMIT_TIER1 -30000 /* uV */
#define WC68_IRDROP_LIMIT_TIER2 -19000 /* uV */
#define WC68_IRDROP_LIMIT_TIER3 0 /* uV */
/* Default value for protections */
#define CBUS_UCP_DFT 400000 /* 400 mV, actual value TBD */
#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 4500000 /* 4.5V */
#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 CBUS_OCP_DFT 3000000 /* 3A */
#define VBUS_OVP_DFT 20000000 /* 20V */
/* Status */
enum {
STS_MODE_CHG_LOOP, /* TODO: There is no such thing */
STS_MODE_VFLT_LOOP,
STS_MODE_IIN_LOOP,
STS_MODE_LOOP_INACTIVE,
STS_MODE_CHG_DONE,
STS_MODE_VIN_UVLO,
};
/* Timer ID */
enum {
TIMER_ID_NONE,
TIMER_VBATMIN_CHECK,
TIMER_PRESET_DC,
TIMER_PRESET_CONFIG,
TIMER_CHECK_ACTIVE,
TIMER_ADJUST_CCMODE,
TIMER_CHECK_CCMODE,
TIMER_ENTER_CVMODE,
TIMER_CHECK_CVMODE, /* 8 */
TIMER_PDMSG_SEND, /* 9 */
TIMER_ADJUST_TAVOL,
TIMER_ADJUST_TACUR,
};
/* TA increment Type */
enum {
INC_NONE, /* No increment */
INC_TA_VOL, /* TA voltage increment */
INC_TA_CUR, /* TA current increment */
};
/* BATT info Type */
enum {
BATT_CURRENT,
BATT_VOLTAGE,
};
static int wc68_hw_init(struct wc68_charger *wc68);
static int wc68_irq_init(struct wc68_charger *wc68,
struct i2c_client *client);
/* From STWC68 driver ***********************/
static int wc68_i2c_read(struct i2c_client *client, void *cmd, u8 cmd_length,
void *read_data, u8 read_count)
{
struct i2c_msg msg[2];
int ret;
msg[0].addr = client->addr;
msg[0].buf = cmd;
msg[0].len = cmd_length;
msg[0].flags = 0;
msg[1].addr = client->addr;
msg[1].buf = read_data;
msg[1].len = read_count;
msg[1].flags = I2C_M_RD;
ret = i2c_transfer(client->adapter, msg, 2);
if (ret != 2) {
dev_err(&client->dev, "i2c transfer failed! err: %d\n", ret);
return -EIO;
}
#ifdef DEBUG
print_hex_dump(KERN_INFO, "[WC] WR-W: ", DUMP_PREFIX_NONE,
16, 1, cmd, cmd_length, 0);
print_hex_dump(KERN_ERR, "[WC] WR-R: ", DUMP_PREFIX_NONE,
16, 1, read_data, read_count, 0);
#endif
return 0;
}
static int wc68_i2c_write(struct i2c_client *client, void *cmd, u8 cmd_length)
{
struct i2c_msg msg[1];
int ret;
msg[0].addr = client->addr;
msg[0].buf = cmd;
msg[0].len = cmd_length;
msg[0].flags = 0;
#ifdef DEBUG
print_hex_dump(KERN_INFO, "[WC] W: ", DUMP_PREFIX_NONE,
16, 1, cmd, cmd_length, 0);
#endif
ret = i2c_transfer(client->adapter, msg, 1);
if (ret != 1) {
dev_err(&client->dev, "i2c transfer failed! err: %d\n", ret);
return -EIO;
}
return 0;
}
static inline int wc68_reg8_get(struct wc68_charger *wc68, u16 addr, u8 *val)
{
u16 cmd[2];
int ret;
cmd[0] = cpu_to_be16(addr);
ret = wc68_i2c_read(wc68->client, &cmd[0], 2, val, 1);
if (ret)
dev_err(wc68->dev, "%s: Error reading addr: %#04X (%d)\n",
__func__, addr, ret);
return ret;
}
static inline int wc68_reg16_get(struct wc68_charger *wc68, u16 addr, u16 *val)
{
u16 cmd[2];
int ret;
cmd[0] = cpu_to_be16(addr);
ret = wc68_i2c_read(wc68->client, &cmd[0], 2, val, 2);
if (ret)
dev_err(wc68->dev, "%s: Error reading addr: %#04X (%d)\n",
__func__, addr, ret);
return ret;
}
static inline int wc68_reg8_set(struct wc68_charger *wc68, u16 addr, u8 val)
{
u16 cmd[2];
int ret;
cmd[0] = cpu_to_be16(addr);
cmd[1] = val;
ret = wc68_i2c_write(wc68->client, &cmd[0], 3);
if (ret)
dev_err(wc68->dev, "%s: Error writing addr: %#04X to val: %d (%d)\n",
__func__, addr, val, ret);
return ret;
}
static inline int wc68_reg16_set(struct wc68_charger *wc68, u16 addr, u16 val)
{
u16 cmd[2];
int ret;
cmd[0] = cpu_to_be16(addr);
cmd[1] = val;
ret = wc68_i2c_write(wc68->client, &cmd[0], 4);
if (ret)
dev_err(wc68->dev, "%s: Error writing addr: %#04X to val: %d (%d)\n",
__func__, addr, val, ret);
return ret;
}
static inline int conv_chg_mode(const struct wc68_charger *wc68, int val)
{
return (wc68->chg_mode == CHG_2TO1_DC_MODE) ? val * 2 : val * 4;
}
static ssize_t chip_info_show(struct device *dev, struct device_attribute *attr, char *buf)
{
int ret;
u16 read_buff[2];
u16 cmd = cpu_to_be16(FWREG_CHIP_ID_REG);
struct wc68_charger *info = dev_get_drvdata(dev);
ret = wc68_i2c_read(info->client, (u8 *)&cmd, 2, read_buff, 4);
if (ret) {
scnprintf(buf, PAGE_SIZE, "%02X\n", ret);
return -EIO;
}
ret = scnprintf(buf, PAGE_SIZE, "%#04X, %#04X\n",
read_buff[0], read_buff[1]);
return ret;
}
static DEVICE_ATTR_RO(chip_info);
static struct attribute *wc_attr_group[] = {
&dev_attr_chip_info.attr,
NULL
};
static bool wc68_is_reg(u16 reg)
{
switch(reg) {
case 0x0 ... FWREG_MAX_REGISTER:
return true;
default:
return false;
}
}
static int read_reg_wc68(void *data, u64 *val)
{
struct wc68_charger *chip = data;
int rc;
u16 cmd;
u64 read_val = 0;
if (chip->debug_count < 1 || chip->debug_count > 8) {
dev_err(chip->dev, "Invalid count: %d. Valid: 1-8\n", chip->debug_count);
return -EINVAL;
}
if (!wc68_is_reg(chip->debug_address)) {
dev_err(chip->dev, "Invalid register address: %#04X\n", chip->debug_address);
return -EINVAL;
}
cmd = cpu_to_be16(chip->debug_address);
rc = wc68_i2c_read(chip->client, &cmd, 2, &read_val, chip->debug_count);
if (rc) {
dev_err(chip->dev, "Couldn't read reg %#x rc = %d\n",
chip->debug_address, rc);
return -EAGAIN;
}
*val = be64_to_cpu(read_val) >> ((8 - chip->debug_count) * 8);
return 0;
}
static int write_reg_wc68(void *data, u64 val)
{
struct wc68_charger *chip = data;
u8 cmd[10];
if (chip->debug_count < 1 || chip->debug_count > 8) {
dev_err(chip->dev, "Invalid count: %d. Valid: 1-8\n", chip->debug_count);
return -EINVAL;
}
if (!wc68_is_reg(chip->debug_address)) {
dev_err(chip->dev, "Invalid register address: %#04X\n", chip->debug_address);
return -EINVAL;
}
cmd[0] = chip->debug_address >> 8;
cmd[1] = chip->debug_address & 0xFF;
val = cpu_to_be64(val) >> ((8 - chip->debug_count) * 8);
memcpy(&cmd[2], &val, chip->debug_count);
return wc68_i2c_write(chip->client, cmd, 2 + chip->debug_count);
}
DEFINE_SIMPLE_ATTRIBUTE(register_debug_ops_wc68, read_reg_wc68, write_reg_wc68, "%#llx\n");
/* ------------------------------------------------------------------------ */
/* ADC Read function, return uV or uA */
int wc68_read_adc(struct wc68_charger *wc68, u8 adc_ch)
{
u16 raw_adc = 0;
int conv_adc = -1;
int ret;
switch (adc_ch) {
case ADCCH_VOUT:
conv_adc = 0;
break;
case ADCCH_VIN:
conv_adc = 0;
break;
case ADCCH_VBAT:
ret = wc68_reg16_get(wc68, VBAT1_ADC, &raw_adc);
if (ret < 0) {
conv_adc = ret;
goto error;
}
conv_adc = raw_adc * VBAT_STEP; /* unit - uV */
break;
case ADCCH_IIN:
ret = wc68_reg16_get(wc68, IBUS_ADC, &raw_adc);
if (ret < 0) {
conv_adc = ret;
goto error;
}
if (raw_adc <= 2047)
conv_adc = raw_adc * IIN_STEP;
else if (raw_adc >= 63488)
conv_adc = (raw_adc - 65536) * IIN_STEP;
else
conv_adc = 0;
break;
case ADCCH_DIETEMP:
ret = wc68_reg16_get(wc68, TDIE_ADC, &raw_adc);
if (ret < 0) {
conv_adc = ret;
goto error;
}
if (raw_adc <= 2047)
conv_adc = 371 + (raw_adc + 2048) * DIETEMP_STEP;
else if (raw_adc >= 63488)
conv_adc = 371 + (raw_adc - 65536 + 2048) * DIETEMP_STEP;
else
conv_adc = 0;
if (conv_adc > DIETEMP_MAX)
conv_adc = DIETEMP_MAX;
else if (conv_adc < DIETEMP_MIN)
conv_adc = DIETEMP_MIN;
break;
case ADCCH_NTC:
conv_adc = 0;
break;
default:
conv_adc = -EINVAL;
break;
}
error:
/* if disabled a channel, re-enable it in -> WC68_REG_ADC_CFG */
dev_dbg(wc68->dev, "%s: adc_ch=%u, raw_adc=%x convert_val=%d\n", __func__,
adc_ch, raw_adc, conv_adc);
return conv_adc;
}
/* v float voltage (5 mV) resolution */
static int wc68_set_vfloat(struct wc68_charger *wc68,
unsigned int v_float)
{
int ret = 0;
u16 val;
ret = wc68_reg16_set(wc68, VBAT_OVP_WARN_THRES, v_float / VFLOAT_STEP);
if (ret < 0)
return ret;
ret = wc68_reg16_get(wc68, VBAT_OVP_WARN_THRES, &val);
if (ret < 0)
return ret;
dev_info(wc68->dev, "%s: v_float=%u, reg: %d (%d) Read back: raw: %d, conv: %d\n",
__func__, v_float, v_float / VFLOAT_STEP, ret, val, val * VFLOAT_STEP);
return ret;
}
static int wc68_set_input_current(struct wc68_charger *wc68,
unsigned int iin)
{
int ret = 0, val;
/* round-up and increase one step */
iin = iin + PD_MSG_TA_CUR_STEP;
val = WC68_IIN_CFG(iin);
/* Set IIN_CFG to one step higher */
val = val + 1;
if (val > 2040)
val = 2040; /* maximum value is 7.469A (7469/3.662) = 2039 */
ret = wc68_reg16_set(wc68, CBUS_OCP_WARN_THRES, val);
dev_info(wc68->dev, "%s: iin=%d real iin_cfg=%d (%d)\n", __func__,
iin, val * IIN_STEP, ret);
return ret;
}
/* Returns the enable or disable value. into 1 or 0. */
static int wc68_get_charging_enabled(struct wc68_charger *wc68)
{
int ret;
u8 val;
ret = wc68_reg8_get(wc68, SYS_CFG_2, &val);
if (ret < 0)
return ret;
return (val & SYS_CFG_2_SC_EN) != 0;
}
/* b/194346461 ramp down IIN */
static int wc68_wlc_ramp_down_iin(struct wc68_charger *wc68,
struct power_supply *wlc_psy)
{
const int ramp_down_step = WC68_IIN_CFG_STEP;
int ret = 0, iin;
if (!wc68->wlc_ramp_out_iin)
return 0;
iin = wc68_input_current_limit(wc68);
for ( ; iin >= WC68_IIN_CFG_MIN; iin -= ramp_down_step) {
int iin_adc, wlc_iout = -1;
iin_adc = wc68_read_adc(wc68, 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 = wc68_set_input_current(wc68, iin);
if (ret < 0) {
dev_err(wc68->dev, "%s: ramp down iin=%d (%d)\n", __func__,
iin, ret);
break;
}
dev_dbg(wc68->dev, "%s: iin_adc=%d, wlc_iout-%d ramp down iin=%d\n",
__func__, iin_adc, wlc_iout, iin);
msleep(wc68->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 wc68_wlc_ramp_down_vout(struct wc68_charger *wc68,
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 = wc68->wlc_ramp_out_vout_target;
int ret, vbatt;
while (true) {
vbatt = wc68_read_adc(wc68, ADCCH_VBAT);
if (vbatt <= 0) {
dev_err(wc68->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(wc68->dev, "%s: invalid vout %d\n", __func__, ret);
break;
}
if (!wc68->wlc_ramp_out_vout_target)
vout_target = vbatt * 4;
if (!vout)
vout = pro_val.intval;
if (vout < vout_target) {
dev_dbg(wc68->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(wc68->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(wc68->dev, "%s: cannot set vout %d\n", __func__, ret);
break;
}
msleep(wc68->wlc_ramp_out_delay);
vout = pro_val.intval;
}
return -EIO;
}
/* call holding mutex_lock(&wc68->lock); */
static int wc68_set_charging(struct wc68_charger *wc68, bool enable)
{
int ret;
dev_dbg(wc68->dev, "%s: enable=%d ta_type=%d\n", __func__, enable, wc68->ta_type);
if (enable && wc68_get_charging_enabled(wc68) == enable) {
dev_dbg(wc68->dev, "%s: no op, already enabled\n", __func__);
return 0;
}
if (enable) {
u8 val;
/* Check USB present */
ret = wc68_reg8_get(wc68, PWRSRC_STS, &val);
if (ret < 0)
goto error;
if (!(val & PWRSRC_STS_USB_PRESENT)) {
dev_err(wc68->dev, "%s: No USB present. Not enabling charging\n", __func__);
goto error;
}
/* Set work mode */
ret = wc68_reg8_set(wc68, SYS_CMD, SYS_CMD_SW_CTRL_USB | (2 * wc68->chg_mode));
if (ret < 0)
goto error;
/* Start charging */
ret = wc68_reg8_set(wc68, SYS_CFG_2, SYS_CFG_2_SC_EN);
if (ret < 0)
goto error;
msleep(150);
/* Enable CBUS_UCP prot for unplug detection */
ret = wc68_reg8_set(wc68, PROT_EN_0, PROT_EN_0_CBUS_UCP_EN);
if (ret)
goto error;
} else {
if (wc68->ta_type == TA_TYPE_WIRELESS) {
struct power_supply *wlc_psy;
wlc_psy = wc68_get_rx_psy(wc68);
if (wlc_psy) {
int ret;
ret = wc68_wlc_ramp_down_iin(wc68, wlc_psy);
if (ret < 0)
dev_err(wc68->dev, "cannot ramp out iin (%d)\n", ret);
ret = wc68_wlc_ramp_down_vout(wc68, wlc_psy);
if (ret < 0)
dev_err(wc68->dev, "cannot ramp out vout (%d)\n", ret);
}
}
/* turn off charging */
ret = wc68_reg8_set(wc68, SYS_CFG_2, 0);
if (ret < 0)
goto error;
/* Turn off FETs and reset chg mode */
ret = wc68_reg8_set(wc68, SYS_CMD, 0);
if (ret < 0)
goto error;
/* Disable CBUS_UCP prot for replug detection */
ret = wc68_reg8_set(wc68, PROT_EN_0, 0);
if (ret)
goto error;
}
error:
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int wc68_check_state(u8 val[8], struct wc68_charger *wc68, int loglevel)
{
int ret;
u16 cmd;
cmd = cpu_to_be16(INTR_FLG_0);
/* Dump register */
ret = wc68_i2c_read(wc68->client, &cmd, 2, val, 8);
if (ret < 0)
return ret;
logbuffer_prlog(wc68, loglevel,
"%s: INTR_FLG reg%#x, %#x, %#x, %#x, %#x, %#x, %#x, %#x",
__func__, val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]);
return 0;
}
/* WC68 is not active state - standby or shutdown */
/* Stop charging in timer_work */
/* return 0 when no error is detected */
static int wc68_check_not_active(struct wc68_charger *wc68)
{
u8 val[8];
u32 prot_sts;
int ret;
u16 cmd;
cmd = cpu_to_be16(PROT_STS_0);
ret = wc68_i2c_read(wc68->client, &cmd, 2, &prot_sts, 4);
if (ret < 0) {
dev_err(wc68->dev, "Error reading PROT_STS err: %d\n", ret);
return ret;
}
if (prot_sts != 0) {
dev_err(wc68->dev, "One or more protections tripped %#08X\n", prot_sts);
return -EINVAL;
}
ret = wc68_check_state(val, wc68, LOGLEVEL_WARNING);
if (ret < 0) {
dev_err(wc68->dev, "%s: cannot read state\n", __func__);
return ret;
}
return 0;
}
/* Keep the current charging state, check STS_B again */
/* return 0 if VIN is still present, -EAGAIN if needs to retry, -EINVAL oth */
int wc68_check_standby(struct wc68_charger *wc68)
{
int ret;
u8 val;
ret = wc68_reg8_get(wc68, CHARGE_STS, &val);
if (ret)
return ret;
return ((val & CHARGE_STS_CHARGING_MASK) == CHARGE_STS_DISCHARGING ||
(val & CHARGE_STS_CHARGING_MASK) == CHARGE_STS_BLOCKED);
}
/*
* 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
* wc68_check_active_state().
*
* Other contexts:
* . wc68_charge_adjust_ccmode
* . wc68_charge_ccmode
* . wc68_charge_start_cvmode
* . wc68_charge_cvmode
*
* call holding mutex_lock(&wc68->lock)
*/
static int wc68_check_error(struct wc68_charger *wc68)
{
int ret;
u8 val;
ret = wc68_reg8_get(wc68, CHARGE_STS, &val);
if (ret < 0)
goto done;
/* WC68 is active state */
if ((val & CHARGE_STS_CHARGING_MASK) == CHARGE_STS_CHARGING ||
(val & CHARGE_STS_CHARGING_MASK) == CHARGE_STS_SLOW_START) {
int vbatt;
/* WC68 is charging */
/* Check whether the battery voltage is over the minimum */
vbatt = wc68_read_adc(wc68, ADCCH_VBAT);
if (vbatt > WC68_DC_VBAT_MIN) {
/* Normal charging battery level */
/* Check temperature regulation loop */
ret = wc68_reg8_get(wc68, INTR_FLG_0, &val);
if (ret < 0) {
dev_err(wc68->dev, "%s: cannot read INTR_FLG_0 (%d)\n",
__func__, ret);
} else if (val & TDIE_OVTP_INTR_MSK) {
/* Over temperature protection */
dev_err(wc68->dev, "%s: Device is in temperature regulation\n",
__func__);
ret = -EINVAL;
}
} else {
/* Abnormal battery level */
dev_err(wc68->dev, "%s: Error abnormal battery voltage=%d\n",
__func__, vbatt);
ret = -EINVAL;
}
dev_dbg(wc68->dev, "%s: Active Status ok=%d (ret=%d)\n", __func__,
ret == 0, ret);
return ret;
}
/* not in error but in standby or shutdown */
ret = wc68_check_not_active(wc68);
if (ret < 0) {
dev_err(wc68->dev, "%s: check_not_active error: %d\n", __func__, ret);
goto done;
}
if (!wc68_check_standby(wc68)) {
/* WC68 is in shutdown state */
dev_err(wc68->dev, "%s: WC68 is in shutdown\n", __func__);
ret = -EINVAL;
} else if (wc68->charging_state == DC_STATE_NO_CHARGING) {
/*
* Sometimes battery driver might call set_property function
* to stop charging during msleep. At this case, charging
* state would change DC_STATE_NO_CHARGING. WC68 should
* stop checking RCP condition and exit timer_work
*/
dev_err(wc68->dev, "%s: other driver forced stop\n", __func__);
ret = -EINVAL;
} else {
/* Check the RCP condition, T_REVI_DET is 300ms */
msleep(200);
/*
* return 0 if VIN is still present, -EAGAIN if needs to retry,
* -EINVAL on error.
*/
ret = wc68_check_standby(wc68);
}
done:
dev_dbg(wc68->dev, "%s: Not Active Status=%d\n", __func__, ret);
return ret;
}
static int wc68_get_iin(struct wc68_charger *wc68, int *iin)
{
const int offset = 0;
int temp;
temp = wc68_read_adc(wc68, ADCCH_IIN);
if (temp < 0)
return temp;
if (temp < offset)
temp = offset;
*iin = conv_chg_mode(wc68, temp - offset);
return 0;
}
/* only needed for irdrop compensation ane maybe not even that... */
static int wc68_get_batt_info(struct wc68_charger *wc68, int info_type, int *info)
{
union power_supply_propval val;
enum power_supply_property psp;
int ret;
if (!wc68->batt_psy)
wc68->batt_psy = power_supply_get_by_name("battery");
if (!wc68->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(wc68->batt_psy, psp, &val);
if (ret == 0)
*info = val.intval;
return ret;
}
/* only needed for irdrop compensation ane maybe not even that... */
static int wc68_get_ibatt(struct wc68_charger *wc68, int *info)
{
return wc68_get_batt_info(wc68, BATT_CURRENT, info);
}
static int wc68_get_current_adcs(struct wc68_charger *wc68, int *pibat, int *picn, int *piin)
{
int rc = wc68_get_ibatt(wc68, pibat);
if (rc)
goto error;
rc = wc68_get_iin(wc68, picn);
if (rc)
goto error;
*piin = wc68_read_adc(wc68, ADCCH_IIN);
return 0;
error:
logbuffer_prlog(wc68, LOGLEVEL_ERR, "%s: Error: rc=%d", __func__, rc);
return rc;
}
static void wc68_prlog_state(struct wc68_charger *wc68, const char *fn)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
int vbat = wc68_read_adc(wc68, ADCCH_VBAT);
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
goto error;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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, wc68->iin_cc, icn, ibat, wc68->cc_max, rc);
return;
error:
dev_info(wc68->dev, "Error reading ibatt or icn: rc: %d, ibatt: %d, icn: %d\n",
rc, ibat, icn);
}
static int wc68_read_status(struct wc68_charger *wc68)
{
int ret = 0;
u8 reg_val;
ret = wc68_reg8_get(wc68, PROT_STS_1, &reg_val);
if (ret < 0) {
dev_err(wc68->dev, "Error reading PROT_STS_1: %d\n", ret);
return ret;
}
if (reg_val & PROT_STS_1_CBUS_OCP_WARN_STS) {
ret = STS_MODE_IIN_LOOP;
} else if (reg_val & PROT_STS_1_VBAT_OVP_WARN_STS) {
ret = STS_MODE_VFLT_LOOP;
} else {
ret = STS_MODE_LOOP_INACTIVE; /* lower IIN or TA to enter CC? */
}
return ret;
}
/*
* TODO: add formula and/or use device tree entries to configure. Can use
* delta = WC68_COMP_VFLOAT_MAX to reduce the limit as float voltage
* increases.
* NOTE: how does this change with temperature, battery age?
*/
static int wc68_irdrop_limit(struct wc68_charger *wc68, int fv_uv)
{
int delta = wc68->pdata->irdrop_limits[1];
if (fv_uv < 4300000)
delta = wc68->pdata->irdrop_limits[0];
if (fv_uv >= WC68_COMP_VFLOAT_MAX)
delta = wc68->pdata->irdrop_limits[2];
return delta;
}
/* use max limit, */
static int wc68_apply_irdrop(struct wc68_charger *wc68, int fv_uv)
{
const int delta_limit = wc68_irdrop_limit(wc68, fv_uv);
int ret, vbat, dc_vbat = 0, delta = 0;
const bool adaptive = false;
/* use classic irdrop */
if (!wc68->pdata->wc68_irdrop)
goto error_done;
ret = wc68_get_batt_info(wc68, BATT_VOLTAGE, &vbat);
if (ret < 0)
goto error_done;
dc_vbat = wc68_read_adc(wc68, ADCCH_VBAT);
if (dc_vbat < 0 || dc_vbat < vbat)
goto error_done;
if (adaptive) {
delta = dc_vbat - vbat;
if (delta > delta_limit)
delta = delta_limit;
} else {
delta = delta_limit;
}
if (fv_uv + delta > WC68_COMP_VFLOAT_MAX)
delta = WC68_COMP_VFLOAT_MAX - fv_uv;
error_done:
dev_dbg(wc68->dev, "%s: fv_uv=%d->%d dc_vbat=%d, vbat=%d delta_v=%d\n",
__func__, fv_uv, fv_uv + delta, dc_vbat,
ret < 0 ? ret : vbat, delta);
if (fv_uv + delta < dc_vbat) {
dev_err(wc68->dev, "%s: fv_uv=%d, comp_fv_uv=%d is lower than VBAT=%d\n",
__func__, fv_uv, fv_uv + delta, dc_vbat);
return -EINVAL;
}
return fv_uv + delta;
}
static int wc68_const_charge_voltage(struct wc68_charger *wc68);
/* irdrop compensation for the wc68 V_FLOAT, will only raise it */
static int wc68_comp_irdrop(struct wc68_charger *wc68)
{
int ret = 0, v_float, fv_uv;
v_float = wc68_const_charge_voltage(wc68);
if (v_float < 0)
return -EIO;
fv_uv = wc68_apply_irdrop(wc68, wc68->fv_uv);
if (fv_uv < 0)
return -EIO;
fv_uv = (fv_uv / VFLOAT_STEP) * VFLOAT_STEP;
/* do not back down */
if (fv_uv > v_float) {
ret = wc68_set_vfloat(wc68, fv_uv);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: v_float=%u->%u (%d)", __func__,
v_float, fv_uv, ret);
}
return ret;
}
static int wc68_check_status(struct wc68_charger *wc68)
{
int icn = -EINVAL, ibat = -EINVAL, vbat = -EINVAL;
int rc, status;
status = wc68_read_status(wc68);
if (status < 0)
goto error;
rc = wc68_get_iin(wc68, &icn);
if (rc)
goto error;
rc = wc68_get_batt_info(wc68, BATT_CURRENT, &ibat);
if (rc)
goto error;
rc = wc68_get_batt_info(wc68, BATT_VOLTAGE, &vbat);
error:
dev_dbg(wc68->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,
wc68->fv_uv, wc68->cc_max);
return status;
}
/* hold mutex_lock(&wc68->lock); */
static int wc68_recover_ta(struct wc68_charger *wc68)
{
int ret;
if (wc68->ta_type == TA_TYPE_WIRELESS) {
wc68->ta_vol = 0; /* set to a value to change rx vol */
ret = wc68_send_rx_voltage(wc68, MSG_REQUEST_FIXED_PDO);
} else {
/* TODO: recover TA to value before handoff, or use DT */
wc68->ta_vol = 9000000;
wc68->ta_cur = 2200000;
wc68->ta_objpos = 1; /* PDO1 - fixed 5V */
ret = wc68_send_pd_message(wc68, MSG_REQUEST_FIXED_PDO);
}
/* will not be able to recover if TA is offline */
if (ret < 0)
dev_dbg(wc68->dev, "%s: cannot recover TA (%d)\n", __func__, ret);
return 0;
}
/* Stop Charging */
static int wc68_stop_charging(struct wc68_charger *wc68)
{
int ret = 0;
/* mark the end with \n in logbuffer */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: wc68->charging_state=%d ret=%d\n",
__func__, wc68->charging_state, ret);
mutex_lock(&wc68->lock);
/* Check the current state */
if (wc68->charging_state == DC_STATE_NO_CHARGING)
goto done;
/* Stop Direct charging */
cancel_delayed_work(&wc68->timer_work);
cancel_delayed_work(&wc68->pps_work);
wc68->timer_id = TIMER_ID_NONE;
wc68->timer_period = 0;
/* Clear parameter */
wc68->charging_state = DC_STATE_NO_CHARGING;
wc68->ret_state = DC_STATE_NO_CHARGING;
wc68->prev_iin = 0;
wc68->prev_inc = INC_NONE;
wc68->chg_mode = CHG_NO_DC_MODE;
/* restore to config */
wc68->pdata->iin_cfg = wc68->pdata->iin_cfg_max;
wc68->pdata->v_float = wc68->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
*/
wc68->cc_max = -1;
wc68->fv_uv = -1;
/* Clear requests for new Vfloat and new IIN */
wc68->new_vfloat = 0;
wc68->new_iin = 0;
/* used to start DC and during errors */
wc68->retry_cnt = 0;
/* close stats */
wc68_chg_stats_done(&wc68->chg_data, wc68);
wc68_chg_stats_dump(wc68);
/* TODO: something here to prep TA for the switch */
ret = wc68_set_charging(wc68, false);
if (ret < 0) {
dev_err(wc68->dev, "%s: Error-set_charging(main)\n", __func__);
goto error;
}
/* stop charging and recover TA voltage */
if (wc68->mains_online == true)
wc68_recover_ta(wc68);
power_supply_changed(wc68->mains);
done:
error:
mutex_unlock(&wc68->lock);
__pm_relax(wc68->monitor_wake_lock);
dev_dbg(wc68->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
* wc68_charge_ccmode() when loop becomes not active.
*
* wc68_charge_ccmode() ->
* -> wc68_set_rx_voltage_comp()
* -> wc68_set_ta_voltage_comp()
* -> wc68_set_ta_current_comp2()
*
* NOTE: call holding mutex_lock(&wc68->lock);
*/
static int wc68_set_ta_current_comp(struct wc68_charger *wc68)
{
const int iin_high = wc68->iin_cc + wc68->pdata->iin_cc_comp_offset;
const int iin_low = wc68->iin_cc - wc68->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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, wc68->iin_cc, iin_high,
icn, ibat, wc68->cc_max, rc,
wc68->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 (wc68->ta_cur > wc68->iin_cc) {
/* TA current is over than IIN_CC */
/* Decrease TA current (50mA) */
wc68->ta_cur = wc68->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont1: ta_cur=%u",
wc68->ta_cur);
/* TA current is already less than IIN_CC */
/* Compara IIN_ADC with the previous IIN_ADC */
} else if (iin < (wc68->prev_iin - WC68_IIN_ADC_OFFSET)) {
/* Assume that TA operation mode is CV mode */
/* Decrease TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2-1: ta_vol=%u",
wc68->ta_vol);
} else {
/* Assume TA operation mode is CL mode */
/* Decrease TA current (50mA) */
wc68->ta_cur = wc68->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2-2: ta_cur=%u",
wc68->ta_cur);
}
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else if (iin < iin_low) {
/* compare IIN ADC with previous IIN ADC + 20mA */
if (iin > (wc68->prev_iin + WC68_IIN_ADC_OFFSET)) {
/*
* TA voltage is not enough to supply the operating
* current of RDO: increase TA voltage
*/
/* Compare TA max voltage */
if (wc68->ta_vol == wc68->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA max current */
if (wc68->ta_cur == wc68->ta_max_cur) {
/* TA voltage and current are at max */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1: ta_vol=%u, ta_cur=%u",
wc68->ta_vol, wc68->ta_cur);
/* Set timer */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
wc68->ta_cur = wc68->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Cont3: ta_cur=%u",
wc68->ta_cur);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* Set TA increment flag */
wc68->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Cont4: ta_vol=%u", wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* Set TA increment flag */
wc68->prev_inc = INC_TA_VOL;
}
/* TA current is lower than the target input current */
/* Check the previous TA increment */
} else if (wc68->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 (wc68->ta_cur == wc68->ta_max_cur) {
/* TA current is already the maximum current */
/* Compare TA max voltage */
if (wc68->ta_vol == wc68->ta_max_vol) {
/*
* TA voltage and current are already
* the maximum values
*/
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End2: ta_vol=%u, ta_cur=%u",
wc68->ta_vol, wc68->ta_cur);
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
/* Increase TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Cont5: ta_vol=%u",
wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* Set TA increment flag */
wc68->prev_inc = INC_TA_VOL;
}
} else {
const unsigned int ta_cur = wc68->ta_cur +
PD_MSG_TA_CUR_STEP;
/* Increase TA current (50mA) */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Cont6: ta_cur=%u->%u",
wc68->ta_cur, ta_cur);
wc68->ta_cur = wc68->ta_cur + PD_MSG_TA_CUR_STEP;
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
wc68->prev_inc = INC_TA_CUR;
}
/*
* The previous increment was TA current, but input current
* did not increase. Try to increase TA voltage.
*/
} else if (wc68->ta_vol == wc68->ta_max_vol) {
/* TA voltage is already the maximum voltage */
/* Compare TA maximum current */
if (wc68->ta_cur == wc68->ta_max_cur) {
/*
* TA voltage and current are already at the
* maximum values
*/
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End3: ta_vol=%u, ta_cur=%u",
wc68->ta_vol, wc68->ta_cur);
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
/* Increase TA current (50mA) */
wc68->ta_cur = wc68->ta_cur + PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Cont7: ta_cur=%u", wc68->ta_cur);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* Set TA increment flag */
wc68->prev_inc = INC_TA_CUR;
}
} else {
/* Increase TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Comp. Cont8: ta_vol=%u->%u",
wc68->ta_vol, wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* Set TA increment flag */
wc68->prev_inc = INC_TA_VOL;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Comp. End4(valid): ta_vol=%u, ta_cur=%u",
wc68->ta_vol, wc68->ta_cur);
/* Set timer */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
/* b/186969924: reset increment state on valid */
wc68->prev_inc = INC_NONE;
}
/* Save previous iin adc */
wc68->prev_iin = iin;
return 0;
}
/*
* max iin for 2:1 mode given cc_max and iin_cfg.
* TODO: maybe use pdata->iin_cfg if cc_max is zero or negative.
*/
static int wc68_get_iin_max(const struct wc68_charger *wc68, int cc_max)
{
const int cc_limit = wc68->pdata->iin_max_offset +
cc_max / conv_chg_mode(wc68, 1);
int iin_max;
iin_max = min(wc68->pdata->iin_cfg_max, (unsigned int)cc_limit);
dev_dbg(wc68->dev, "%s: iin_max=%d iin_cfg=%u iin_cfg_max=%d cc_max=%d cc_limit=%d\n",
__func__, iin_max, wc68->pdata->iin_cfg,
wc68->pdata->iin_cfg_max, cc_max, cc_limit);
return iin_max;
}
/* Compensate TA current for constant power mode */
/* hold mutex_lock(&wc68->lock), schedule on return 0 */
static int wc68_set_ta_current_comp2(struct wc68_charger *wc68)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
/* IIN = IBAT+SYSLOAD */
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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,
wc68->iin_cc - WC68_IIN_CC_COMP_OFFSET_CP,
wc68->iin_cc,
wc68->iin_cc + WC68_IIN_CC_COMP_OFFSET_CP,
wc68->pdata->iin_cfg,
icn, ibat, wc68->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (wc68->pdata->iin_cfg + wc68->pdata->iin_cc_comp_offset)) {
/* TA current is higher than the target input current limit */
wc68->ta_cur = wc68->ta_cur - PD_MSG_TA_CUR_STEP;
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else if (iin < (wc68->iin_cc - WC68_IIN_CC_COMP_OFFSET_CP)) {
/* TA current is lower than the target input current */
/* IIN_ADC < IIN_CC -20mA */
if (wc68->ta_vol == wc68->ta_max_vol) {
const int iin_cc_lb = wc68->iin_cc -
wc68->pdata->iin_cc_comp_offset;
/* Check IIN_ADC < IIN_CC - 50mA */
if (iin < iin_cc_lb) {
const unsigned int ta_max_vol =
wc68->pdata->ta_max_vol * wc68->chg_mode;
unsigned int iin_apdo;
unsigned int val;
/* Set new IIN_CC to IIN_CC - 50mA */
wc68->iin_cc = wc68->iin_cc -
wc68->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 = wc68->iin_cc / PD_MSG_TA_CUR_STEP;
iin_apdo = iin_apdo * PD_MSG_TA_CUR_STEP;
/* in mV */
val = wc68->ta_max_pwr / (iin_apdo / wc68->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 */
wc68->ta_max_vol = min(val, ta_max_vol);
/* Increase TA voltage(40mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP * 2;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Cont1: ta_vol=%u",
wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else {
/* Wait for next current step compensation */
/* IIN_CC - 50mA < IIN ADC < IIN_CC - 20mA */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Comp.(wait): ta_vol=%u",
wc68->ta_vol);
/* Set timer */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK2_T;
}
} else {
/* Increase TA voltage(40mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP * 2;
if (wc68->ta_vol > wc68->ta_max_vol)
wc68->ta_vol = wc68->ta_max_vol;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CFG + 50mA */
dev_dbg(wc68->dev, "End(valid): ta_vol=%u\n", wc68->ta_vol);
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK2_T;
/* b/186969924: reset increment state on valid */
wc68->prev_inc = INC_NONE;
}
/* Save previous iin adc */
wc68->prev_iin = iin;
return 0;
}
/* Compensate TA voltage for the target input current */
/* hold mutex_lock(&wc68->lock), schedule on return 0 */
static int wc68_set_ta_voltage_comp(struct wc68_charger *wc68)
{
const int iin_high = wc68->iin_cc + wc68->pdata->iin_cc_comp_offset;
const int iin_low = wc68->iin_cc - wc68->pdata->iin_cc_comp_offset;
const int ibat_limit = (wc68->cc_max * FCC_POWER_INCREASE_THRESHOLD) / 100;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
dev_dbg(wc68->dev, "%s: = charging_state=%u == \n", __func__,
wc68->charging_state);
/* IIN = IBAT+SYSLOAD */
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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, wc68->iin_cc, iin_high,
icn, ibat, wc68->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) */
wc68->ta_vol = wc68->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else if (iin < wc68->iin_cc - wc68->pdata->iin_cc_comp_offset) {
/* TA current is lower than the target input current */
/* Compare TA max voltage */
if (wc68->ta_vol == wc68->ta_max_vol) {
/* TA is already at maximum voltage */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,"End1(max TA vol): ta_vol=%u",
wc68->ta_vol);
/* Set timer */
/* Check the current charging state */
if (wc68->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
/* CV mode */
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = WC68_CVMODE_CHECK_T;
}
} else {
const unsigned int ta_vol = wc68->ta_vol;
/* Increase TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2: ta_vol:%u->%u",
ta_vol, wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End(valid): ta_vol=%u low_ibat=%d\n",
wc68->ta_vol, ibat < ibat_limit);
/* Check the current charging state */
if (wc68->charging_state == DC_STATE_CC_MODE) {
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = WC68_CVMODE_CHECK_T;
}
}
return 0;
}
/* hold mutex_lock(&wc68->lock), schedule on return 0 */
static int wc68_set_rx_voltage_comp(struct wc68_charger *wc68)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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,
wc68->iin_cc - wc68->pdata->iin_cc_comp_offset,
wc68->iin_cc,
wc68->iin_cc + wc68->pdata->iin_cc_comp_offset,
icn, ibat, wc68->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with target input current */
if (iin > (wc68->iin_cc + wc68->pdata->iin_cc_comp_offset)) {
/* RX current is higher than the target input current */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont1: rx_vol=%u",
wc68->ta_vol);
/* Set RX Voltage */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else if (iin < (wc68->iin_cc - wc68->pdata->iin_cc_comp_offset)) {
/* RX current is lower than the target input current */
/* Compare RX max voltage */
if (wc68->ta_vol == wc68->ta_max_vol) {
/* TA current is already the maximum voltage */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1(max RX vol): rx_vol=%u",
wc68->ta_vol);
/* Check the current charging state */
if (wc68->charging_state == DC_STATE_CC_MODE) {
/* CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
/* CV mode */
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = WC68_CVMODE_CHECK_T;
}
} else {
/* Increase RX voltage (100mV) */
wc68->ta_vol = wc68->ta_vol + WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2: rx_vol=%u",
wc68->ta_vol);
/* Set RX Voltage */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "End(valid): rx_vol=%u",
wc68->ta_vol);
if (wc68->charging_state == DC_STATE_CC_MODE) {
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = WC68_CCMODE_CHECK1_T;
} else {
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = WC68_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 wc68_get_iin_limit(const struct wc68_charger *wc68)
{
int iin_cc;
iin_cc = wc68_get_iin_max(wc68, wc68->cc_max);
if (wc68->ta_max_cur < iin_cc)
iin_cc = wc68->ta_max_cur;
dev_dbg(wc68->dev, "%s: iin_cc=%d ta_max_cur=%u, chg_mode=%d\n", __func__,
iin_cc, wc68->ta_max_cur, wc68->chg_mode);
return iin_cc;
}
/* recalculate ->ta_vol looking at demand (cc_max) */
static int wc68_set_wireless_dc(struct wc68_charger *wc68, int vbat)
{
unsigned long val;
wc68->iin_cc = wc68_get_iin_limit(wc68);
/* RX_vol = MAX[(2*VBAT_ADC*CHG_mode + 500mV), 8.0V*CHG_mode] */
wc68->ta_vol = max(WC68_TA_MIN_VOL_PRESET * wc68->chg_mode,
(2 * vbat * wc68->chg_mode +
WC68_TA_VOL_PRE_OFFSET));
/* RX voltage resolution is 100mV */
val = wc68->ta_vol / WCRX_VOL_STEP;
wc68->ta_vol = val * WCRX_VOL_STEP;
/* Set RX voltage to MIN[RX voltage, RX_MAX_VOL*chg_mode] */
wc68->ta_vol = min(wc68->ta_vol, wc68->ta_max_vol);
/* ta_cur is ignored */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_max_vol=%d", __func__,
wc68->iin_cc, wc68->ta_vol, wc68->ta_max_vol);
return 0;
}
/* recalculate ->ta_vol and ->ta_cur looking at demand (cc_max) */
static int wc68_set_wired_dc(struct wc68_charger *wc68, int vbat)
{
const unsigned long ta_max_vol = wc68->pdata->ta_max_vol * wc68->chg_mode;
unsigned long val;
int iin_cc;
wc68->iin_cc = wc68_get_iin_limit(wc68);
/* Update OCP_WARN_THRES as chg_mode might have changed to 2:1 */
wc68_set_input_current(wc68, wc68->iin_cc);
wc68->pdata->iin_cfg = wc68->iin_cc;
/* Calculate new TA max voltage, current */
val = wc68->iin_cc / PD_MSG_TA_CUR_STEP;
iin_cc = val * PD_MSG_TA_CUR_STEP;
val = wc68->ta_max_pwr / (iin_cc / wc68->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 */
wc68->ta_max_vol = min(val, ta_max_vol);
/* MAX[8000mV * chg_mode, 2 * VBAT_ADC * chg_mode + 500 mV] */
wc68->ta_vol = max(WC68_TA_MIN_VOL_PRESET * wc68->chg_mode,
2 * vbat * wc68->chg_mode + WC68_TA_VOL_PRE_OFFSET);
/* PPS voltage resolution is 20mV */
val = wc68->ta_vol / PD_MSG_TA_VOL_STEP;
wc68->ta_vol = val * PD_MSG_TA_VOL_STEP;
wc68->ta_vol = min(wc68->ta_vol, wc68->ta_max_vol);
/* Set TA current to IIN_CC */
wc68->ta_cur = iin_cc;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: iin_cc=%d, ta_vol=%d ta_cur=%d ta_max_vol=%d",
__func__, wc68->iin_cc, wc68->ta_vol, wc68->ta_cur,
wc68->ta_max_vol);
return 0;
}
/*
* like wc68_preset_dcmode() but will not query the TA.
* Called from timer:
* [wc68_charge_ccmode | wc68_charge_cvmode] ->
* wc68_apply_new_iin() ->
* wc68_adjust_ta_current() ->
* wc68_reset_dcmode()
* wc68_apply_new_vfloat() ->
* wc68_reset_dcmode()
*
* NOTE: caller holds mutex_lock(&wc68->lock);
*/
static int wc68_reset_dcmode(struct wc68_charger *wc68)
{
int ret = -EINVAL, vbat;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
dev_dbg(wc68->dev, "%s: = charging_state=%u == \n", __func__,
wc68->charging_state);
if (wc68->cc_max < 0) {
dev_err(wc68->dev, "%s: invalid cc_max=%d\n", __func__, wc68->cc_max);
goto error;
}
/*
* VBAT is over threshold but it might be "bouncy" due to transitory
* used to determine ta_vout.
*/
vbat = wc68_read_adc(wc68, ADCCH_VBAT);
if (vbat < 0)
return vbat;
/* Check the TA type and set the charging mode */
if (wc68->ta_type == TA_TYPE_WIRELESS)
ret = wc68_set_wireless_dc(wc68, vbat);
else
ret = wc68_set_wired_dc(wc68, vbat);
/* Clear previous IIN ADC, TA increment flag */
wc68->prev_inc = INC_NONE;
wc68->prev_iin = 0;
error:
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* The caller was triggered from wc68_apply_new_iin(), return to the
* calling CC or CV loop.
* call holding mutex_unlock(&wc68->lock);
*/
static void wc68_return_to_loop(struct wc68_charger *wc68)
{
switch (wc68->ret_state) {
case DC_STATE_CC_MODE:
wc68->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_CV_MODE:
wc68->timer_id = TIMER_CHECK_CVMODE;
break;
default:
dev_err(wc68->dev, "%s: invalid ret_state=%u\n",
__func__, wc68->ret_state);
return;
}
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, wc68->ret_state);
wc68->charging_state = wc68->ret_state;
wc68->timer_period = 1000;
wc68->ret_state = 0;
wc68->new_iin = 0;
}
/*
* Kicked from wc68_apply_new_iin() when wc68->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 wc68_adjust_ta_current(struct wc68_charger *wc68)
{
const int ta_limit = wc68->iin_cc;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
int ret = 0;
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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, wc68->iin_cc, ta_limit, wc68->pdata->iin_cfg,
icn, ibat, wc68->cc_max, rc);
if (wc68->charging_state != DC_STATE_ADJUST_TACUR)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_ADJUST_TACUR);
wc68->charging_state = DC_STATE_ADJUST_TACUR;
if (wc68->ta_cur == ta_limit) {
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"adj. End, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
wc68->ta_cur, wc68->ta_vol,
wc68->iin_cc, wc68->chg_mode);
/* "Recover" IIN_CC to the original value (new_iin) */
wc68->iin_cc = wc68->new_iin;
wc68_return_to_loop(wc68);
} else if (wc68->iin_cc > wc68->pdata->iin_cfg) {
const int old_iin_cfg = wc68->pdata->iin_cfg;
/* Raise iin_cfg to the new iin_cc value (why??!?!?) */
wc68->pdata->iin_cfg = wc68->iin_cc;
ret = wc68_set_input_current(wc68, wc68->iin_cc);
if (ret == 0)
ret = wc68_reset_dcmode(wc68);
if (ret < 0)
goto error;
logbuffer_prlog(wc68, 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",
wc68->ta_max_vol, wc68->ta_max_cur,
wc68->ta_max_pwr, wc68->iin_cc,
old_iin_cfg, wc68->iin_cc,
wc68->chg_mode);
wc68->new_iin = 0;
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_ADJUST_CC);
/* Send PD Message and go to Adjust CC mode */
wc68->charging_state = DC_STATE_ADJUST_CC;
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else {
unsigned int val;
/*
* Adjust IIN_CC with APDO resolution(50mA)
* wc68->iin_cc will be reset to wc68->new_iin when
* ->ta_cur reaches the ta_limit at the beginning of the
* function
*/
val = wc68->iin_cc / PD_MSG_TA_CUR_STEP;
wc68->iin_cc = val * PD_MSG_TA_CUR_STEP;
wc68->ta_cur = wc68->iin_cc;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "adjust iin=%u ta_cur=%d chg_mode=%d",
wc68->iin_cc, wc68->ta_cur, wc68->chg_mode);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
/* reschedule on ret == 0 */
error:
return ret;
}
/* Kicked from apply_new_iin() then run off the timer
* call holding mutex_lock(&wc68->lock);
*/
static int wc68_adjust_ta_voltage(struct wc68_charger *wc68)
{
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (wc68->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_ADJUST_TAVOL);
wc68->charging_state = DC_STATE_ADJUST_TAVOL;
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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, wc68->iin_cc - PD_MSG_TA_CUR_STEP,
wc68->iin_cc, wc68->iin_cc + PD_MSG_TA_CUR_STEP,
icn, ibat, wc68->cc_max, rc);
if (iin < 0)
return iin;
/* Compare IIN ADC with targer input current */
if (iin > (wc68->iin_cc + PD_MSG_TA_CUR_STEP)) {
/* TA current is higher than the target input current */
/* Decrease TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont1, ta_vol=%u",
wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else if (iin < (wc68->iin_cc - PD_MSG_TA_CUR_STEP)) {
/* TA current is lower than the target input current */
if (wc68_check_status(wc68) == STS_MODE_VFLT_LOOP) {
/* IIN current may not able to increase in CV */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
wc68->ta_cur, wc68->ta_vol,
wc68->iin_cc, wc68->chg_mode);
wc68_return_to_loop(wc68);
} else if (wc68->ta_vol == wc68->ta_max_vol) {
/* TA TA voltage is already at the maximum voltage */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
wc68->ta_cur, wc68->ta_vol,
wc68->iin_cc, wc68->chg_mode);
wc68_return_to_loop(wc68);
} else {
/* Increase TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol + PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2, ta_vol=%u",
wc68->ta_vol);
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
/* IIN_CC - 50mA < IIN ADC < IIN_CC + 50mA */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End2, ta_cur=%u, ta_vol=%u, iin_cc=%u, chg_mode=%u",
wc68->ta_cur, wc68->ta_vol,
wc68->iin_cc, wc68->chg_mode);
wc68_return_to_loop(wc68);
}
return 0;
}
/*
* Kicked from apply_new_iin() then run off the timer
* * NOTE: caller must hold mutex_lock(&wc68->lock)
*/
static int wc68_adjust_rx_voltage(struct wc68_charger *wc68)
{
const int iin_high = wc68->iin_cc + wc68->pdata->iin_cc_comp_offset;
const int iin_low = wc68->iin_cc - wc68->pdata->iin_cc_comp_offset;
int rc, ibat, icn = -EINVAL, iin = -EINVAL;
bool ovc_flag;
if (wc68->charging_state != DC_STATE_ADJUST_TAVOL)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_ADJUST_TAVOL);
wc68->charging_state = DC_STATE_ADJUST_TAVOL;
rc = wc68_get_current_adcs(wc68, &ibat, &icn, &iin);
if (rc)
return rc;
ovc_flag = ibat > wc68->cc_max;
if (ovc_flag)
wc68_chg_stats_inc_ovcf(&wc68->chg_data, ibat, wc68->cc_max);
logbuffer_prlog(wc68, 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, wc68->iin_cc, iin_high,
icn, ibat, wc68->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) */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont1, rx_vol=%u",
wc68->ta_vol);
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
} else if (iin < iin_low) {
/* RX current is lower than the target input current */
if (wc68_check_status(wc68) == STS_MODE_VFLT_LOOP) {
/* RX current may not able to increase in CV */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1-1, skip adjust for cv, rx_vol=%u, iin_cc=%u",
wc68->ta_vol, wc68->iin_cc);
wc68_return_to_loop(wc68);
} else if (wc68->ta_vol == wc68->ta_max_vol) {
/* RX current is already the maximum voltage */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1, rx_vol=%u, iin_cc=%u, chg_mode=%u",
wc68->ta_vol, wc68->iin_cc,
wc68->chg_mode);
/* Return charging state to the previous state */
wc68_return_to_loop(wc68);
} else {
/* Increase RX voltage (100mV) */
wc68->ta_vol = wc68->ta_vol + WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2, rx_vol=%u",
wc68->ta_vol);
/* Set RX voltage */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
} else {
/* IIN ADC is in valid range */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End2, rx_vol=%u, iin_cc=%u, chg_mode=%u",
wc68->ta_vol, wc68->iin_cc,
wc68->chg_mode);
/* Return charging state to the previous state */
wc68_return_to_loop(wc68);
}
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(&wc68->lock)
*/
static int wc68_apply_new_iin(struct wc68_charger *wc68)
{
int ret;
logbuffer_prlog(wc68, LOGLEVEL_INFO,
"new_iin=%d (cc_max=%d), ta_type=%d charging_state=%d",
wc68->new_iin, wc68->cc_max,
wc68->ta_type, wc68->charging_state);
/* iin_cfg is adjusted UP in wc68_set_input_current() */
ret = wc68_set_input_current(wc68, wc68->new_iin);
if (ret < 0)
return ret;
wc68->pdata->iin_cfg = wc68->new_iin;
/*
* ->ret_state is used to go back to the loop (CC or CV) that called
* this function.
*/
wc68->ret_state = wc68->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.
*/
wc68->iin_cc = wc68->new_iin;
if (wc68->ta_type == TA_TYPE_WIRELESS) {
ret = wc68_adjust_rx_voltage(wc68);
} else if (wc68->iin_cc < WC68_TA_MIN_CUR) {
/* TA current = WC68_TA_MIN_CUR(1.0A) */
wc68->ta_cur = WC68_TA_MIN_CUR;
ret = wc68_adjust_ta_voltage(wc68);
} else {
ret = wc68_adjust_ta_current(wc68);
}
/* need reschedule on ret != 0 */
dev_dbg(wc68->dev, "%s: ret=%d\n", __func__, ret);
return ret;
}
/*
* also called from wc68_set_new_cc_max()
* call holding mutex_unlock(&wc68->lock);
*/
static int wc68_set_new_iin(struct wc68_charger *wc68, int iin)
{
int ret = 0;
if (iin < 0) {
dev_dbg(wc68->dev, "%s: ignore negative iin=%d\n", __func__, iin);
return 0;
}
/* same as previous request nevermind */
if (iin == wc68->new_iin)
return 0;
dev_dbg(wc68->dev, "%s: new_iin=%d->%d state=%d\n", __func__,
wc68->new_iin, iin, wc68->charging_state);
/* apply iin_cc in wc68_preset_config() at start */
if (wc68->charging_state == DC_STATE_NO_CHARGING ||
wc68->charging_state == DC_STATE_CHECK_VBAT) {
/* used on start vs the ->iin_cfg one */
wc68->pdata->iin_cfg = iin;
wc68->iin_cc = iin;
} else if (wc68->ret_state == 0) {
/*
* wc68_apply_new_iin() has not picked out the value yet
* and the value can be changed safely.
*/
wc68->new_iin = iin;
/* might want to tickle the loop now */
} else {
/* the caller must retry */
ret = -EAGAIN;
}
dev_dbg(wc68->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 wc68_set_new_cc_max(struct wc68_charger *wc68, int cc_max)
{
const int prev_cc_max = wc68->cc_max;
int iin_max, ret = 0;
if (cc_max < 0) {
dev_dbg(wc68->dev, "%s: ignore negative cc_max=%d\n", __func__, cc_max);
return 0;
}
mutex_lock(&wc68->lock);
/* same as previous request nevermind */
if (cc_max == wc68->cc_max)
goto done;
/* iin will be capped by the adapter capabilities in reset_dcmode() */
iin_max = wc68_get_iin_max(wc68, cc_max);
if (iin_max <= 0) {
dev_dbg(wc68->dev, "%s: ignore negative iin_max=%d\n", __func__, iin_max);
goto done;
}
ret = wc68_set_new_iin(wc68, iin_max);
if (ret == 0)
wc68->cc_max = cc_max;
logbuffer_prlog(wc68, LOGLEVEL_INFO,
"%s: charging_state=%d cc_max=%d->%d iin_max=%d, ret=%d",
__func__, wc68->charging_state, prev_cc_max,
cc_max, iin_max, ret);
done:
dev_dbg(wc68->dev, "%s: ret=%d\n", __func__, ret);
mutex_unlock(&wc68->lock);
return ret;
}
/*
* Apply wc68->new_vfloat to the charging voltage.
* Called from CC and CV loops, needs mutex_lock(&wc68->lock)
*/
static int wc68_apply_new_vfloat(struct wc68_charger *wc68)
{
int fv_uv, ret = 0;
/* compensated float voltage, -EINVAL if under dc_vbat */
fv_uv = wc68_apply_irdrop(wc68, wc68->new_vfloat);
if (fv_uv < 0)
return fv_uv;
if (wc68->fv_uv == fv_uv)
goto error_done;
/* actually change the hardware */
ret = wc68_set_vfloat(wc68, fv_uv);
if (ret < 0)
goto error_done;
wc68->fv_uv = fv_uv;
error_done:
logbuffer_prlog(wc68, LOGLEVEL_INFO,
"%s: new_vfloat=%d, fv_uv=%d ret=%d", __func__,
wc68->new_vfloat, fv_uv, ret);
if (ret == 0)
wc68->new_vfloat = 0;
return ret;
}
static int wc68_set_new_vfloat(struct wc68_charger *wc68, int vfloat)
{
int ret = 0;
if (vfloat < 0) {
dev_dbg(wc68->dev, "%s: ignore negative vfloat %d\n", __func__, vfloat);
return 0;
}
mutex_lock(&wc68->lock);
if (wc68->new_vfloat == vfloat)
goto done;
/* use fv_uv at start in wc68_preset_config() */
if (wc68->charging_state == DC_STATE_NO_CHARGING ||
wc68->charging_state == DC_STATE_CHECK_VBAT) {
wc68->fv_uv = vfloat;
} else {
/* applied in wc68_apply_new_vfloat() from CC or in CV loop */
wc68->new_vfloat = vfloat;
pr_debug("%s: new_vfloat=%d\n", __func__, wc68->new_vfloat);
/* might want to tickle the cycle */
}
done:
mutex_unlock(&wc68->lock);
return ret;
}
/* called on loop inactive */
static int wc68_ajdust_ccmode_wireless(struct wc68_charger *wc68, int iin)
{
/* IIN_ADC > IIN_CC -20mA ? */
if (iin > (wc68->iin_cc - WC68_IIN_ADC_OFFSET)) {
/* Input current is already over IIN_CC */
/* End RX voltage adjustment */
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
wc68->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "End1: IIN_ADC=%d, rx_vol=%u",
iin, wc68->ta_vol);
/* Clear TA increment flag */
wc68->prev_inc = INC_NONE;
/* Go to CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = 0;
/* Check RX voltage */
} else if (wc68->ta_vol == wc68->ta_max_vol) {
/* RX voltage is already max value */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,"End2: MAX value, rx_vol=%u max=%d",
wc68->ta_vol, wc68->ta_max_vol);
/* Clear TA increment flag */
wc68->prev_inc = INC_NONE;
/* Go to CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = 0;
} else {
/* Try to increase RX voltage(100mV) */
wc68->ta_vol = wc68->ta_vol + WCRX_VOL_STEP;
if (wc68->ta_vol > wc68->ta_max_vol)
wc68->ta_vol = wc68->ta_max_vol;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont: rx_vol=%u",
wc68->ta_vol);
/* Set RX voltage */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
return 0;
}
/* called on loop inactive */
static int wc68_ajdust_ccmode_wired(struct wc68_charger *wc68, int iin)
{
/* USBPD TA is connected */
if (iin > (wc68->iin_cc - WC68_IIN_ADC_OFFSET)) {
/* IIN_ADC > IIN_CC -20mA ? */
/* Input current is already over IIN_CC */
/* End TA voltage and current adjustment */
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CC_MODE);
/* change charging state to CC mode */
wc68->charging_state = DC_STATE_CC_MODE;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End1: IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, wc68->ta_vol, wc68->ta_cur);
/* Clear TA increment flag */
wc68->prev_inc = INC_NONE;
/* Go to CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = 0;
/* Check TA voltage */
} else if (wc68->ta_vol == wc68->ta_max_vol) {
/* TA voltage is already max value */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End2: MAX value, ta_vol=%u, ta_cur=%u",
wc68->ta_vol, wc68->ta_cur);
/* Clear TA increment flag */
wc68->prev_inc = INC_NONE;
/* Go to CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->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 < (wc68->iin_cc - WC68_TA_IIN_OFFSET)) {
/*
* TA voltage too low to enter TA CC mode, so we
* should increase TA voltage
*/
wc68->ta_vol = wc68->ta_vol + WC68_TA_VOL_STEP_ADJ_CC *
wc68->chg_mode;
if (wc68->ta_vol > wc68->ta_max_vol)
wc68->ta_vol = wc68->ta_max_vol;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont1: ta_vol=%u",
wc68->ta_vol);
/* Set TA increment flag */
wc68->prev_inc = INC_TA_VOL;
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* compare IIN ADC with previous IIN ADC + 20mA */
} else if (iin > (wc68->prev_iin + WC68_IIN_ADC_OFFSET)) {
/* TA can supply more current if TA voltage is high */
/* TA voltage too low for TA CC mode: increase it */
wc68->ta_vol = wc68->ta_vol +
WC68_TA_VOL_STEP_ADJ_CC *
wc68->chg_mode;
if (wc68->ta_vol > wc68->ta_max_vol)
wc68->ta_vol = wc68->ta_max_vol;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont2: ta_vol=%u",
wc68->ta_vol);
/* Set TA increment flag */
wc68->prev_inc = INC_TA_VOL;
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
/* Check the previous increment */
} else if (wc68->prev_inc == INC_TA_CUR) {
/*
* The previous increment is TA current, but input
* current does not increase. Try with voltage.
*/
wc68->ta_vol = wc68->ta_vol +
WC68_TA_VOL_STEP_ADJ_CC *
wc68->chg_mode;
if (wc68->ta_vol > wc68->ta_max_vol)
wc68->ta_vol = wc68->ta_max_vol;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont3: ta_vol=%u",
wc68->ta_vol);
wc68->prev_inc = INC_TA_VOL;
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->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 (wc68->ta_cur == wc68->ta_max_cur) {
/* TA current is maximum current */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"End(MAX_CUR): IIN_ADC=%d, ta_vol=%u, ta_cur=%u",
iin, wc68->ta_vol, wc68->ta_cur);
wc68->prev_inc = INC_NONE;
/* Go to CC mode */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = 0;
} else {
/* TA has tolerance and compensate it as real current */
/* Increase TA current(50mA) */
wc68->ta_cur = wc68->ta_cur + PD_MSG_TA_CUR_STEP;
if (wc68->ta_cur > wc68->ta_max_cur)
wc68->ta_cur = wc68->ta_max_cur;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "Cont4: ta_cur=%u",
wc68->ta_cur);
wc68->prev_inc = INC_TA_CUR;
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
}
return 0;
}
/* 2:1 Direct Charging Adjust CC MODE control
* called at the beginnig of CC mode charging. Will be followed by
* wc68_charge_ccmode with which share some of the adjustments.
*/
static int wc68_charge_adjust_ccmode(struct wc68_charger *wc68)
{
int iin, ccmode, vbatt, vin_vol;
bool apply_ircomp = false;
int ret = 0;
mutex_lock(&wc68->lock);
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
wc68_prlog_state(wc68, __func__);
if (wc68->charging_state != DC_STATE_ADJUST_CC)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_ADJUST_CC);
wc68->charging_state = DC_STATE_ADJUST_CC;
ret = wc68_check_error(wc68);
if (ret != 0)
goto error; /*This is not active mode. */
ccmode = wc68_check_status(wc68);
if (ccmode < 0) {
ret = ccmode;
goto error;
}
switch(ccmode) {
case STS_MODE_IIN_LOOP:
case STS_MODE_CHG_LOOP: /* CHG_LOOP does't exist */
apply_ircomp = true;
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "End1: rx_vol=%u",
wc68->ta_vol);
} else if (wc68->ta_cur > WC68_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
wc68->ta_cur = wc68->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "End2: ta_cur=%u, ta_vol=%u",
wc68->ta_cur, wc68->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "End3: ta_cur=%u, ta_vol=%u",
wc68->ta_cur, wc68->ta_vol);
}
wc68->prev_inc = INC_NONE;
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CC_MODE);
/* Send PD Message and then go to CC mode */
wc68->charging_state = DC_STATE_CC_MODE;
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
vbatt = wc68_read_adc(wc68, ADCCH_VBAT);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "End4: vbatt=%d, ta_vol=%u",
vbatt, wc68->ta_vol);
/* Clear TA increment flag */
wc68->prev_inc = INC_NONE;
/* Go to Pre-CV mode */
wc68->timer_id = TIMER_ENTER_CVMODE;
wc68->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
iin = wc68_read_adc(wc68, ADCCH_IIN);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"Inactive: iin=%d, iin_cc=%d, cc_max=%d",
iin, wc68->iin_cc, wc68->cc_max);
if (iin < 0)
break;
if (wc68->ta_type == TA_TYPE_WIRELESS) {
ret = wc68_ajdust_ccmode_wireless(wc68, iin);
} else {
ret = wc68_ajdust_ccmode_wired(wc68, iin);
}
if (ret < 0) {
dev_err(wc68->dev, "%s: %d", __func__, ret);
} else {
wc68->prev_iin = iin;
apply_ircomp = true;
}
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = wc68_read_adc(wc68, ADCCH_VIN);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "VIN_UVLO: ta_vol=%u, vin_vol=%d",
wc68->ta_cur, vin_vol);
/* Check VIN after 1sec */
wc68->timer_id = TIMER_ADJUST_CCMODE;
wc68->timer_period = 1000;
break;
default:
goto error;
}
if (wc68->pdata->wc68_irdrop && apply_ircomp) {
int rc;
rc = wc68_comp_irdrop(wc68);
if (rc < 0)
dev_err(wc68->dev, "%s: cannot apply ircomp (%d)\n", __func__, rc);
}
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
error:
mutex_unlock(&wc68->lock);
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* <0 error, 0 no new limits, >0 new limits */
static int wc68_apply_new_limits(struct wc68_charger *wc68)
{
int ret = 0;
if (wc68->new_iin && wc68->new_iin < wc68->iin_cc) {
ret = wc68_apply_new_iin(wc68);
if (ret == 0)
ret = 1;
} else if (wc68->new_vfloat) {
ret = wc68_apply_new_vfloat(wc68);
if (ret == 0)
ret = 1;
} else if (wc68->new_iin) {
ret = wc68_apply_new_iin(wc68);
if (ret == 0)
ret = 1;
} else {
return 0;
}
return ret;
}
/* 2:1 Direct Charging CC MODE control */
static int wc68_charge_ccmode(struct wc68_charger *wc68)
{
int ccmode, vin_vol, iin, ret = 0;
bool apply_ircomp = false;
dev_dbg(wc68->dev, "%s: ======START======= \n", __func__);
mutex_lock(&wc68->lock);
if (wc68->charging_state != DC_STATE_CC_MODE)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CC_MODE);
wc68->charging_state = DC_STATE_CC_MODE;
wc68_prlog_state(wc68, __func__);
ret = wc68_check_error(wc68);
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.
* wc68_apply_new_limits() changes wc68->charging_state to
* DC_STATE_ADJUST_TAVOL or DC_STATE_ADJUST_TACUR when new limits
* need to be applied.
*/
ret = wc68_apply_new_limits(wc68);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
ccmode = wc68_check_status(wc68);
if (ccmode < 0) {
ret = ccmode;
goto error_exit;
}
switch(ccmode) {
case STS_MODE_LOOP_INACTIVE:
/* Set input current compensation */
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Need RX voltage compensation */
ret = wc68_set_rx_voltage_comp(wc68);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "INACTIVE1: rx_vol=%u",
wc68->ta_vol);
} else {
const int ta_max_vol = wc68->ta_max_vol;
/* Check TA current with TA_MIN_CUR */
if (wc68->ta_cur <= WC68_TA_MIN_CUR) {
wc68->ta_cur = WC68_TA_MIN_CUR;
ret = wc68_set_ta_voltage_comp(wc68);
} else if (ta_max_vol >= wc68->pdata->ta_max_vol_cp) {
ret = wc68_set_ta_current_comp(wc68);
} else {
/* constant power mode */
ret = wc68_set_ta_current_comp2(wc68);
}
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"INACTIVE2: ta_cur=%u, ta_vol=%u",
wc68->ta_cur,
wc68->ta_vol);
}
if (ret == 0)
apply_ircomp = true;
break;
case STS_MODE_VFLT_LOOP:
/* TODO: adjust fv_uv here based on real vbatt */
iin = wc68_read_adc(wc68, ADCCH_IIN);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG, "CC VFLOAT: iin=%d", iin);
/* go to Pre-CV mode */
wc68->timer_id = TIMER_ENTER_CVMODE;
wc68->timer_period = 0;
break;
case STS_MODE_IIN_LOOP:
case STS_MODE_CHG_LOOP:
iin = wc68_read_adc(wc68, ADCCH_IIN);
if (iin < 0)
break;
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"IIN_LOOP1: iin=%d, next_rx_vol=%u",
iin, wc68->ta_vol);
} else if (wc68->ta_cur <= WC68_TA_MIN_CUR) {
/* Decrease TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"IIN_LOOP2: iin=%d, next_ta_vol=%u",
iin, wc68->ta_vol);
} else {
/* Decrease TA current (50mA) */
wc68->ta_cur = wc68->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"IIN_LOOP3: iin=%d, next_ta_cur=%u",
iin, wc68->ta_cur);
}
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = wc68_read_adc(wc68, ADCCH_VIN);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
wc68->ta_cur, wc68->ta_vol, vin_vol);
/* Check VIN after 1sec */
wc68->timer_id = TIMER_CHECK_CCMODE;
wc68->timer_period = 1000;
break;
default:
break;
}
if (wc68->pdata->wc68_irdrop && apply_ircomp) {
int rc;
rc = wc68_comp_irdrop(wc68);
if (rc < 0)
dev_err(wc68->dev, "%s: cannot apply ircomp (%d)\n",
__func__, rc);
}
done:
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
error_exit:
mutex_unlock(&wc68->lock);
dev_dbg(wc68->dev, "%s: End, ccmode=%d timer_id=%d, timer_period=%lu ret=%d\n",
__func__, ccmode, wc68->timer_id, wc68->timer_period,
ret);
return ret;
}
/* 2:1 Direct Charging Start CV MODE control - Pre CV MODE */
static int wc68_charge_start_cvmode(struct wc68_charger *wc68)
{
int ret = 0;
int cvmode;
int vin_vol;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
mutex_lock(&wc68->lock);
if (wc68->charging_state != DC_STATE_START_CV)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_START_CV);
wc68->charging_state = DC_STATE_START_CV;
/* Check the charging type */
ret = wc68_check_error(wc68);
if (ret != 0)
goto error_exit;
/* Check the status */
cvmode = wc68_check_status(wc68);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
switch(cvmode) {
case STS_MODE_CHG_LOOP:
case STS_MODE_IIN_LOOP:
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: rx_vol=%u",
__func__, wc68->ta_vol);
} else {
/* Check TA current */
if (wc68->ta_cur > WC68_TA_MIN_CUR) {
/* TA current is higher than 1.0A */
/* Decrease TA current (50mA) */
wc68->ta_cur = wc68->ta_cur - PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_cur=%u",
__func__, wc68->ta_cur);
} else {
/* TA current is less than 1.0A */
/* Decrease TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol - PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV IIN_LOOP: ta_vol=%u",
__func__, wc68->ta_vol);
}
}
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
/* Check the TA type */
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage (100mV) */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: rx_vol=%u",
__func__, wc68->ta_vol);
} else {
/* Decrease TA voltage (20mV) */
wc68->ta_vol = wc68->ta_vol -
WC68_TA_VOL_STEP_PRE_CV *
wc68->chg_mode;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV VF Cont: ta_vol=%u",
__func__, wc68->ta_vol);
}
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
/* Exit Pre CV mode */
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV End: ta_vol=%u, ta_cur=%u",
__func__, wc68->ta_vol, wc68->ta_cur);
/* Need to implement notification to other driver */
/* To do here */
/* Go to CV mode */
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = 0;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification , it works by hardware */
vin_vol = wc68_read_adc(wc68, ADCCH_VIN);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: PreCV VIN_UVLO: ta_vol=%u, vin_vol=%u",
__func__, wc68->ta_cur, vin_vol);
/* Check VIN after 1sec */
wc68->timer_id = TIMER_ENTER_CVMODE;
wc68->timer_period = 1000;
break;
default:
break;
}
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
error_exit:
mutex_unlock(&wc68->lock);
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int wc68_check_eoc(struct wc68_charger *wc68)
{
const int eoc_tolerance = 25000; /* 25mV under max float voltage */
const int vlimit = WC68_COMP_VFLOAT_MAX - eoc_tolerance;
int iin, vbat;
iin = wc68_read_adc(wc68, ADCCH_IIN);
if (iin < 0) {
dev_err(wc68->dev, "%s: iin=%d\n", __func__, iin);
return iin;
}
vbat = wc68_read_adc(wc68, ADCCH_VBAT);
if (vbat < 0) {
dev_err(wc68->dev, "%s: vbat=%d\n", __func__, vbat);
return vbat;
}
dev_dbg(wc68->dev, "%s: iin=%d, topoff=%u, vbat=%d vlimit=%d\n", __func__,
iin, wc68->pdata->iin_topoff,
vbat, vlimit);
return iin < wc68->pdata->iin_topoff && vbat >= vlimit;
}
/* 2:1 Direct Charging CV MODE control */
static int wc68_charge_cvmode(struct wc68_charger *wc68)
{
int ret = 0;
int cvmode;
int vin_vol;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
mutex_lock(&wc68->lock);
if (wc68->charging_state != DC_STATE_CV_MODE)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CV_MODE);
wc68->charging_state = DC_STATE_CV_MODE;
ret = wc68_check_error(wc68);
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 = wc68_apply_new_limits(wc68);
if (ret < 0)
goto error_exit;
if (ret > 0)
goto done;
cvmode = wc68_check_status(wc68);
if (cvmode < 0) {
ret = cvmode;
goto error_exit;
}
if (cvmode == STS_MODE_LOOP_INACTIVE) {
ret = wc68_check_eoc(wc68);
if (ret < 0)
goto error_exit;
if (ret)
cvmode = STS_MODE_CHG_DONE;
}
switch(cvmode) {
case STS_MODE_CHG_DONE: {
const bool done_already = wc68->charging_state ==
DC_STATE_CHARGING_DONE;
if (!done_already)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n",
__func__, wc68->charging_state,
DC_STATE_CHARGING_DONE);
/* Keep CV mode until driver send stop charging */
wc68->charging_state = DC_STATE_CHARGING_DONE;
power_supply_changed(wc68->mains);
/* _cpm already came in */
if (wc68->charging_state == DC_STATE_NO_CHARGING) {
dev_dbg(wc68->dev, "%s: Already stop DC\n", __func__);
break;
}
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: done_already=%d charge Done\n", __func__,
done_already);
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = WC68_CVMODE_CHECK_T;
} break;
case STS_MODE_CHG_LOOP:
case STS_MODE_IIN_LOOP:
/* Check the TA type */
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX Voltage (100mV) */
wc68->ta_vol = wc68->ta_vol -
WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: rx_vol=%u",
__func__, wc68->ta_vol);
/* Check TA current */
} else if (wc68->ta_cur > WC68_TA_MIN_CUR) {
/* TA current is higher than (1.0A*chg_mode) */
/* Decrease TA current (50mA) */
wc68->ta_cur = wc68->ta_cur -
PD_MSG_TA_CUR_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_cur=%u",
__func__, wc68->ta_cur);
} else {
/* TA current is less than (1.0A*chg_mode) */
/* Decrease TA Voltage (20mV) */
wc68->ta_vol = wc68->ta_vol -
PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: CV LOOP, Cont: ta_vol=%u",
__func__, wc68->ta_vol);
}
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
break;
case STS_MODE_VFLT_LOOP:
/* Check the TA type */
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* Decrease RX voltage */
wc68->ta_vol = wc68->ta_vol - WCRX_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: rx_vol=%u",
__func__, wc68->ta_vol);
} else {
/* Decrease TA voltage */
wc68->ta_vol = wc68->ta_vol - 2 * PD_MSG_TA_VOL_STEP;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: CV VFLOAT, Cont: ta_vol=%u",
__func__, wc68->ta_vol);
}
/* Send PD Message */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
break;
case STS_MODE_LOOP_INACTIVE:
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = WC68_CVMODE_CHECK_T;
break;
case STS_MODE_VIN_UVLO:
/* VIN UVLO - just notification, it works by hardware */
vin_vol = wc68_read_adc(wc68, ADCCH_VIN);
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: CC VIN_UVLO: ta_cur=%u ta_vol=%u, vin_vol=%d",
__func__, wc68->ta_cur, wc68->ta_vol,
vin_vol);
/* Check VIN after 1sec */
wc68->timer_id = TIMER_CHECK_CVMODE;
wc68->timer_period = 1000;
break;
default:
break;
}
done:
dev_dbg(wc68->dev, "%s: reschedule next id=%d period=%ld chg_state=%d\n",
__func__, wc68->timer_id, wc68->timer_period,
wc68->charging_state);
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
error_exit:
mutex_unlock(&wc68->lock);
dev_dbg(wc68->dev, "%s: End, ret=%d next\n", __func__, ret);
return ret;
}
static int wc68_set_chg_mode_by_apdo(struct wc68_charger *wc68)
{
int ret;
unsigned int ta_max_vol = wc68->pdata->ta_max_vol;
/*
* 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 = wc68_get_apdo_max_power(wc68, ta_max_vol * CHG_4TO1_DC_MODE, WC68_TA_MAX_CUR_4_1);
if (ret == 0) {
wc68->chg_mode = CHG_4TO1_DC_MODE;
goto done;
}
dev_warn(wc68->dev, "%s: No APDO to support 4:1 for %d, max_voltage: %d\n",
__func__, WC68_TA_MAX_CUR_4_1, ta_max_vol * CHG_4TO1_DC_MODE);
ret = wc68_get_apdo_max_power(wc68, ta_max_vol * CHG_2TO1_DC_MODE, WC68_TA_MAX_CUR);
if (ret == 0) {
wc68->chg_mode = CHG_2TO1_DC_MODE;
goto done;
}
dev_warn(wc68->dev, "%s: No APDO to support 2:1 for %d, max_voltage: %d\n",
__func__, WC68_TA_MAX_CUR, ta_max_vol * CHG_2TO1_DC_MODE);
ret = wc68_get_apdo_max_power(wc68, ta_max_vol * CHG_2TO1_DC_MODE, 0);
if (ret == 0) {
wc68->chg_mode = CHG_2TO1_DC_MODE;
goto done;
}
dev_err(wc68->dev, "%s: No APDO to support 2:1\n", __func__);
wc68->chg_mode = CHG_NO_DC_MODE;
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 wc68_preset_dcmode(struct wc68_charger *wc68)
{
int vbat;
int ret = 0;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
dev_dbg(wc68->dev, "%s: = charging_state=%u == \n", __func__,
wc68->charging_state);
/* gcpm set ->cc_max and ->fv_uv before starting */
if (wc68->cc_max < 0 || wc68->fv_uv < 0) {
dev_err(wc68->dev, "%s: cc_max=%d fv_uv=%d invalid\n", __func__,
wc68->cc_max, wc68->fv_uv);
return -EINVAL;
}
if (wc68->charging_state != DC_STATE_PRESET_DC)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_PRESET_DC);
wc68->charging_state = DC_STATE_PRESET_DC;
/* VBAT is over threshold but it might be "bouncy" due to transitory */
vbat = wc68_read_adc(wc68, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* v_float is set on start from GCPM */
if (vbat > wc68->fv_uv) {
dev_err(wc68->dev, "%s: vbat adc=%d is higher than VFLOAT=%d\n", __func__,
vbat, wc68->fv_uv);
ret = -EINVAL;
goto error;
}
/* determined by ->cfg_iin and cc_max */
wc68->ta_max_cur = wc68_get_iin_max(wc68, wc68->cc_max);
dev_dbg(wc68->dev, "%s: ta_max_cur=%u, iin_cfg=%u, wc68->ta_type=%d\n",
__func__, wc68->ta_max_cur, wc68->pdata->iin_cfg,
wc68->ta_type);
/* Check the TA type and set the charging mode */
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/*
* Set the RX max voltage to enough high value to find RX
* maximum voltage initially
*/
wc68->ta_max_vol = WC68_WCRX_MAX_VOL * wc68->chg_mode;
/* Get the RX max current/voltage(RX_MAX_CUR/VOL) */
ret = wc68_get_rx_max_power(wc68);
if (ret < 0) {
dev_err(wc68->dev, "%s: no RX voltage to support 4:1 (%d)\n",
__func__, ret);
wc68->chg_mode = CHG_NO_DC_MODE;
goto error;
}
ret = wc68_set_wireless_dc(wc68, vbat);
if (ret < 0) {
dev_err(wc68->dev, "%s: set wired failed (%d)\n", __func__, ret);
wc68->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(wc68, LOGLEVEL_INFO,
"Preset DC, rx_max_vol=%u, rx_max_cur=%u, rx_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
wc68->ta_max_vol, wc68->ta_max_cur, wc68->ta_max_pwr,
wc68->iin_cc, wc68->chg_mode);
} else {
ret = wc68_set_chg_mode_by_apdo(wc68);
if (ret < 0) {
int ret1;
if (!wc68->dc_avail)
wc68->dc_avail = gvotable_election_get_handle(VOTABLE_DC_CHG_AVAIL);
if (wc68->dc_avail) {
ret1 = gvotable_cast_int_vote(wc68->dc_avail, REASON_DC_DRV, 0, 1);
if (ret1 < 0)
dev_err(wc68->dev,
"Unable to cast vote for DC Chg avail (%d)\n",
ret1);
}
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 = wc68_set_wired_dc(wc68, vbat);
if (ret < 0) {
dev_err(wc68->dev, "%s: set wired failed (%d)\n", __func__, ret);
wc68->chg_mode = CHG_NO_DC_MODE;
goto error;
}
logbuffer_prlog(wc68, LOGLEVEL_INFO,
"Preset DC, objpos=%d ta_max_vol=%u, ta_max_cur=%u, ta_max_pwr=%lu, iin_cc=%u, chg_mode=%u",
wc68->ta_objpos, wc68->ta_max_vol, wc68->ta_max_cur,
wc68->ta_max_pwr, wc68->iin_cc, wc68->chg_mode);
}
error:
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/* Preset direct charging configuration and start charging */
static int wc68_preset_config(struct wc68_charger *wc68)
{
int ret = 0;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
mutex_lock(&wc68->lock);
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_PRESET_DC);
wc68->charging_state = DC_STATE_PRESET_DC;
/* ->iin_cc and ->fv_uv are configured externally */
ret = wc68_set_input_current(wc68, wc68->pdata->iin_cfg);
if (ret < 0)
goto error;
ret = wc68_set_vfloat(wc68, wc68->fv_uv);
if (ret < 0)
goto error;
/* Enable WC68 unless aready enabled */
ret = wc68_set_charging(wc68, true);
if (ret < 0)
goto error;
/* Clear previous iin adc */
wc68->prev_iin = 0;
wc68->prev_inc = INC_NONE;
/* Go to CHECK_ACTIVE state after 150ms, 300ms for wireless */
wc68->timer_id = TIMER_CHECK_ACTIVE;
if (wc68->ta_type == TA_TYPE_WIRELESS)
wc68->timer_period = WC68_ENABLE_WLC_DELAY_T;
else
wc68->timer_period = WC68_ENABLE_DELAY_T;
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
error:
mutex_unlock(&wc68->lock);
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
/*
* Check the charging status at start before entering the adjust cc mode or
* from wc68_send_message() after a failure.
*/
static int wc68_check_active_state(struct wc68_charger *wc68)
{
int ret = 0;
dev_dbg(wc68->dev, "%s: ======START=======\n", __func__);
dev_dbg(wc68->dev, "%s: = charging_state=%u == \n", __func__,
wc68->charging_state);
mutex_lock(&wc68->lock);
if (wc68->charging_state != DC_STATE_CHECK_ACTIVE)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CHECK_ACTIVE);
wc68->charging_state = DC_STATE_CHECK_ACTIVE;
ret = wc68_check_error(wc68);
if (ret == 0) {
/* WC68 is active state */
wc68->retry_cnt = 0;
wc68->timer_id = TIMER_ADJUST_CCMODE;
wc68->timer_period = 0;
} else if (ret == -EAGAIN) {
/* try restarting only */
if (wc68->retry_cnt >= WC68_MAX_RETRY_CNT) {
dev_err(wc68->dev, "%s: retry failed\n", __func__);
ret = -EINVAL;
goto exit_done;
}
/*
* Disable charging to retry enabling it later, return 0 here
* and the timer loop will figure out that there is something
* wrong and will retry.
*/
ret = wc68_set_charging(wc68, false);
dev_err(wc68->dev, "%s: retry cnt=%d, (%d)\n", __func__,
wc68->retry_cnt, ret);
if (ret == 0) {
wc68->timer_id = TIMER_PRESET_DC;
wc68->timer_period = 0;
wc68->retry_cnt++;
}
}
exit_done:
/* Implement error handler function if it is needed */
if (ret < 0) {
logbuffer_prlog(wc68, LOGLEVEL_ERR,
"%s: charging_state=%d, not active or error (%d)",
__func__, wc68->charging_state, ret);
wc68->timer_id = TIMER_ID_NONE;
wc68->timer_period = 0;
}
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
mutex_unlock(&wc68->lock);
return ret;
}
/* Enter direct charging algorithm */
static int wc68_start_direct_charging(struct wc68_charger *wc68)
{
struct wc68_chg_stats *chg_data = &wc68->chg_data;
int ret;
dev_dbg(wc68->dev, "%s: =========START=========\n", __func__);
mutex_lock(&wc68->lock);
/* configure DC charging type for the requested index */
ret = wc68_set_ta_type(wc68, wc68->pps_index);
dev_info(wc68->dev, "%s: Current ta_type=%d, chg_mode=%d\n", __func__,
wc68->ta_type, wc68->chg_mode);
if (ret < 0)
goto error_done;
/* wake lock */
__pm_stay_awake(wc68->monitor_wake_lock);
/* Preset charging configuration and TA condition */
ret = wc68_preset_dcmode(wc68);
if (ret == 0) {
/* Configure the TA and start charging */
wc68->timer_id = TIMER_PDMSG_SEND;
wc68->timer_period = 0;
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
}
error_done:
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
wc68_chg_stats_update(chg_data, wc68);
mutex_unlock(&wc68->lock);
return ret;
}
/* Check Vbat minimum level to start direct charging */
static int wc68_check_vbatmin(struct wc68_charger *wc68)
{
int ret = 0, vbat;
dev_dbg(wc68->dev, "%s: =========START=========\n", __func__);
mutex_lock(&wc68->lock);
if (wc68->charging_state != DC_STATE_CHECK_VBAT)
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CHECK_VBAT);
wc68->charging_state = DC_STATE_CHECK_VBAT;
vbat = wc68_read_adc(wc68, ADCCH_VBAT);
if (vbat < 0) {
ret = vbat;
goto error;
}
/* wait for hw init and CPM to send in the params */
if (wc68->cc_max < 0 || wc68->fv_uv < 0 || !wc68->hw_init_done) {
dev_info(wc68->dev, "%s: not yet fv_uv=%d, cc_max=%d vbat=%d, hw_init_done=%d\n",
__func__, wc68->fv_uv, wc68->cc_max, vbat, wc68->hw_init_done);
/* retry again after 1sec */
wc68->timer_id = TIMER_VBATMIN_CHECK;
wc68->timer_period = WC68_VBATMIN_CHECK_T;
wc68->retry_cnt += 1;
} else {
logbuffer_prlog(wc68, LOGLEVEL_INFO,
"%s: starts at fv_uv=%d, cc_max=%d vbat=%d (min=%d)",
__func__, wc68->fv_uv, wc68->cc_max, vbat,
WC68_DC_VBAT_MIN);
wc68->timer_id = TIMER_PRESET_DC;
wc68->timer_period = 0;
wc68->retry_cnt = 0; /* start charging */
}
/* timeout for VBATMIN or charging parameters */
if (wc68->retry_cnt > WC68_MAX_RETRY_CNT) {
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: TIMEOUT fv_uv=%d, cc_max=%d vbat=%d limit=%d",
__func__, wc68->fv_uv, wc68->cc_max, vbat,
WC68_DC_VBAT_MIN);
ret = -ETIMEDOUT;
} else {
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
}
error:
mutex_unlock(&wc68->lock);
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int wc68_send_message(struct wc68_charger *wc68)
{
int val, ret;
const int timer_id = wc68->timer_id;
/* Go to the next state */
mutex_lock(&wc68->lock);
dev_dbg(wc68->dev, "%s: ====== START ======= \n", __func__);
/* Adjust TA current and voltage step */
if (wc68->ta_type == TA_TYPE_WIRELESS) {
/* RX voltage resolution is 100mV */
val = wc68->ta_vol / WCRX_VOL_STEP;
wc68->ta_vol = val * WCRX_VOL_STEP;
/* Set RX voltage */
dev_dbg(wc68->dev, "%s: ta_type=%d, ta_vol=%d\n", __func__,
wc68->ta_type, wc68->ta_vol);
ret = wc68_send_rx_voltage(wc68, WCRX_REQUEST_VOLTAGE);
} else {
/* PPS voltage resolution is 20mV */
val = wc68->ta_vol / PD_MSG_TA_VOL_STEP;
wc68->ta_vol = val * PD_MSG_TA_VOL_STEP;
/* PPS current resolution is 50mA */
val = wc68->ta_cur / PD_MSG_TA_CUR_STEP;
wc68->ta_cur = val * PD_MSG_TA_CUR_STEP;
/* PPS minimum current is 1000mA */
if (wc68->ta_cur < WC68_TA_MIN_CUR)
wc68->ta_cur = WC68_TA_MIN_CUR;
dev_dbg(wc68->dev, "%s: ta_type=%d, ta_vol=%d ta_cur=%d\n", __func__,
wc68->ta_type, wc68->ta_vol, wc68->ta_cur);
/* Send PD Message */
ret = wc68_send_pd_message(wc68, PD_MSG_REQUEST_APDO);
}
switch (wc68->charging_state) {
case DC_STATE_PRESET_DC:
wc68->timer_id = TIMER_PRESET_CONFIG;
break;
case DC_STATE_ADJUST_CC:
wc68->timer_id = TIMER_ADJUST_CCMODE;
break;
case DC_STATE_CC_MODE:
wc68->timer_id = TIMER_CHECK_CCMODE;
break;
case DC_STATE_START_CV:
wc68->timer_id = TIMER_ENTER_CVMODE;
break;
case DC_STATE_CV_MODE:
wc68->timer_id = TIMER_CHECK_CVMODE;
break;
case DC_STATE_ADJUST_TAVOL:
wc68->timer_id = TIMER_ADJUST_TAVOL;
break;
case DC_STATE_ADJUST_TACUR:
wc68->timer_id = TIMER_ADJUST_TACUR;
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0) {
dev_err(wc68->dev, "%s: Error-send_pd_message to %d (%d)\n",
__func__, wc68->ta_type, ret);
wc68->timer_id = TIMER_CHECK_ACTIVE;
}
if (wc68->ta_type == TA_TYPE_WIRELESS)
wc68->timer_period = WC68_PDMSG_WLC_WAIT_T;
else
wc68->timer_period = WC68_PDMSG_WAIT_T;
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: charging_state=%u timer_id:%d->%d ret=%d",
__func__, wc68->charging_state,
timer_id, wc68->timer_id, ret);
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
dev_dbg(wc68->dev, "%s: End: timer_id=%d timer_period=%lu\n", __func__,
wc68->timer_id, wc68->timer_period);
mutex_unlock(&wc68->lock);
return ret;
}
/* delayed work function for charging timer */
static void wc68_timer_work(struct work_struct *work)
{
struct wc68_charger *wc68 =
container_of(work, struct wc68_charger, timer_work.work);
unsigned int charging_state;
int timer_id;
int ret = 0;
dev_dbg(wc68->dev, "%s: ========= START =========\n", __func__);
/* TODO: remove locks from the calls and run all of this locked */
mutex_lock(&wc68->lock);
wc68_chg_stats_update(&wc68->chg_data, wc68);
charging_state = wc68->charging_state;
timer_id = wc68->timer_id;
dev_dbg(wc68->dev, "%s: timer id=%d, charging_state=%u\n", __func__,
wc68->timer_id, charging_state);
mutex_unlock(&wc68->lock);
switch (timer_id) {
/* charging_state <- DC_STATE_CHECK_VBAT */
case TIMER_VBATMIN_CHECK:
ret = wc68_check_vbatmin(wc68);
if (ret < 0)
goto error;
break;
/* charging_state <- DC_STATE_PRESET_DC */
case TIMER_PRESET_DC:
ret = wc68_start_direct_charging(wc68);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* preset configuration, start charging
*/
case TIMER_PRESET_CONFIG:
ret = wc68_preset_config(wc68);
if (ret < 0)
goto error;
break;
/*
* charging_state <- DC_STATE_PRESET_DC
* 150 ms after preset_config
*/
case TIMER_CHECK_ACTIVE:
ret = wc68_check_active_state(wc68);
if (ret < 0)
goto error;
break;
case TIMER_ADJUST_CCMODE:
ret = wc68_charge_adjust_ccmode(wc68);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CCMODE:
ret = wc68_charge_ccmode(wc68);
if (ret < 0)
goto error;
break;
case TIMER_ENTER_CVMODE:
/* Enter Pre-CV mode */
ret = wc68_charge_start_cvmode(wc68);
if (ret < 0)
goto error;
break;
case TIMER_CHECK_CVMODE:
ret = wc68_charge_cvmode(wc68);
if (ret < 0)
goto error;
break;
case TIMER_PDMSG_SEND:
ret = wc68_send_message(wc68);
if (ret < 0)
goto error;
break;
/* called from 2 contexts */
case TIMER_ADJUST_TAVOL:
mutex_lock(&wc68->lock);
if (wc68->ta_type == TA_TYPE_WIRELESS)
ret = wc68_adjust_rx_voltage(wc68);
else
ret = wc68_adjust_ta_voltage(wc68);
if (ret < 0) {
mutex_unlock(&wc68->lock);
goto error;
}
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
mutex_unlock(&wc68->lock);
break;
/* called from 2 contexts */
case TIMER_ADJUST_TACUR:
mutex_lock(&wc68->lock);
ret = wc68_adjust_ta_current(wc68);
if (ret < 0) {
mutex_unlock(&wc68->lock);
goto error;
}
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
mutex_unlock(&wc68->lock);
break;
case TIMER_ID_NONE:
ret = wc68_stop_charging(wc68);
if (ret < 0)
goto error;
break;
default:
break;
}
/* Check the charging state again */
if (wc68->charging_state == DC_STATE_NO_CHARGING) {
cancel_delayed_work(&wc68->timer_work);
cancel_delayed_work(&wc68->pps_work);
}
dev_dbg(wc68->dev, "%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld\n",
__func__, timer_id, wc68->timer_id, charging_state,
wc68->charging_state, wc68->timer_period);
return;
error:
dev_dbg(wc68->dev, "%s: ========= ERROR =========\n", __func__);
logbuffer_prlog(wc68, LOGLEVEL_ERR,
"%s: timer_id=%d->%d, charging_state=%u->%u, period=%ld ret=%d",
__func__, timer_id, wc68->timer_id, charging_state,
wc68->charging_state, wc68->timer_period, ret);
wc68_stop_charging(wc68);
}
/* delayed work function for resetting DC chip */
static void wc68_init_hw_work(struct work_struct *work)
{
struct wc68_charger *wc68 = container_of(work,
struct wc68_charger, init_hw_work.work);
int ret;
ret = wc68_hw_init(wc68);
if (ret) {
dev_err(wc68->dev, "Error initializing hw %d\n", ret);
goto error;
}
wc68->hw_init_done = true;
error:
return;
}
/* delayed work function for pps periodic timer */
static void wc68_pps_request_work(struct work_struct *work)
{
struct wc68_charger *wc68 = container_of(work,
struct wc68_charger, pps_work.work);
int ret;
dev_dbg(wc68->dev, "%s: =========START=========\n", __func__);
dev_dbg(wc68->dev, "%s: = charging_state=%u == \n", __func__,
wc68->charging_state);
ret = wc68_send_pd_message(wc68, PD_MSG_REQUEST_APDO);
if (ret < 0)
dev_err(wc68->dev, "%s: Error-send_pd_message\n", __func__);
/* TODO: do other background stuff */
dev_dbg(wc68->dev, "%s: ret=%d\n", __func__, ret);
}
int wc68_hw_ping(struct wc68_charger *wc68)
{
int ret;
u16 read_buff[1];
u16 val;
ret = wc68_reg16_get(wc68, FWREG_CHIP_ID_REG, read_buff);
if (ret) {
dev_err(wc68->dev, "STWC68 Error reading version\n");
return -EIO;
}
val = read_buff[0];
dev_err(wc68->dev, "STWC68 version: %#04X\n", val);
return 0;
}
static int wc68_hw_init(struct wc68_charger *wc68)
{
int ret;
u16 cmd[3];
u8 val;
int retries = 20;
/* Reset the chip */
ret = wc68_reg8_set(wc68, SYS_CMD, SYS_CMD_SYS_RESET);
if (ret)
goto error_done;
/* Wait for boot up after reset */
do {
msleep(100);
ret = wc68_reg8_get(wc68, INTR_FLG_3, &val);
} while (retries-- && !ret && !(val & INTR_FLG_3_BOOTUP_RDY));
if (ret) {
dev_err(wc68->dev, "STWC68 Error reading boot up flag %d\n", ret);
goto error_done;
}
if(retries == 0) {
dev_err(wc68->dev, "STWC68 retries exhausted waiting for chip boot up\n");
ret = -EIO;
goto error_done;
}
if (wc68->pdata->irq_gpio >= 0) {
ret = wc68_irq_init(wc68, wc68->client);
if (ret < 0)
dev_warn(wc68->dev, "%s: failed to initialize IRQ: %d\n", __func__, ret);
else
disable_irq(wc68->client->irq);
}
/* Disable all protections */
cmd[0] = cpu_to_be16(PROT_EN_0);
cmd[1] = cmd[2] = 0;
ret = wc68_i2c_write(wc68->client, &cmd[0], 6);
if (ret) {
dev_err(wc68->dev, "%s: Error disabling protections: %d\n",
__func__, ret);
goto error_done;
}
/* Set switching frequency and deadtime */
ret = wc68_reg8_set(wc68, SYS_CFG_1, 0x67);
if (ret)
goto error_done;
/* Set safety switch drive voltage 5V */
ret = wc68_reg8_set(wc68, SYS_CFG_3, 0xFD);
if (ret)
goto error_done;
/* Configure protection thresholds */
ret = wc68_reg16_set(wc68, VBAT_REV_UVP_THRES, VBAT_REV_UVP_DFT / VBAT_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, VBAT_UVP_THRES, VBAT_UVP_DFT / VBAT_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, VBAT_OVP_WARN_THRES, VBAT_OVP_WARN_DFT / VBAT_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, VBAT_OVP_THRES, VBAT_OVP_DFT / VBAT_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, SWCAP_OVP_THRES, SWCAP_OVP_DFT / SWCAP_OVP_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, SWCAP_UVP_THRES,
(SWCAP_UVP_DFT / SWCAP_OVP_STEP) + SWCAP_UVP_OFFSET);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, CBAT_OCP_WARN_THRES, CBAT_OCP_WARN_DFT / SWCAP_OVP_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, CBAT_OCP_THRES, CBAT_OCP_DFT / SWCAP_OVP_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, CBUS_OCP_WARN_THRES, CBUS_OCP_WARN_DFT / CBUS_UCP_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, CBUS_OCP_THRES, CBUS_OCP_DFT / CBUS_UCP_STEP);
if (ret)
goto error_done;
ret = wc68_reg16_set(wc68, VBUS_OVP_THRES,
((VBUS_OVP_DFT / SWCAP_OVP_STEP) + SWCAP_UVP_OFFSET) & 0xFFFF);
if (ret)
goto error_done;
/* Configure UCP threshold for unplug detection */
ret = wc68_reg16_set(wc68, CBUS_UCP_THRES, CBUS_UCP_DFT / CBUS_UCP_STEP);
if (ret)
goto error_done;
/* Enable the protections we need */
ret = wc68_reg8_set(wc68, PROT_EN_1,
PROT_EN_1_VBAT_OVP_WARN_EN | PROT_EN_1_CBUS_OCP_WARN_EN);
if (ret)
goto error_done;
/* Enable ADC */
ret = wc68_reg8_set(wc68, ADC_CTRL, ADC_CTRL_CONT_EN);
if (ret)
goto error_done;
msleep(200);
error_done:
return ret;
}
static irqreturn_t wc68_interrupt_handler(int irq, void *data)
{
struct wc68_charger *wc68 = data;
bool handled = true;
int ret;
u16 cmd[2];
u8 val[5];
cmd[0] = cpu_to_be16(INTR_FLG_0);
ret = wc68_i2c_read(wc68->client, &cmd[0], 2, &val[0], 5);
if (ret) {
dev_err(wc68->dev, "%s: Error reading INTR_FLG_0: %d\n",
__func__, ret);
goto exit_done;
}
dev_dbg(wc68->dev, "%s: FLG %d, %d, %d, %d, %d\n", __func__,
val[0], val[1], val[2], val[3], val[4]);
if (val[0] & VBAT_OVP_INTR_MSK) {
dev_info(wc68->dev, "%s: In VFLT LOOP\n", __func__);
}
if (val[1] & CBUS_OCP_INTR_MSK) {
dev_info(wc68->dev, "%s: In IIN LOOP\n", __func__);
}
cmd[0] = cpu_to_be16(INTR_EN_0);
ret = wc68_i2c_read(wc68->client, &cmd[0], 2, &val[0], 5);
if (ret < 0) {
dev_err(wc68->dev, "%s: Error reading interrupts enable: %d\n",
__func__, ret);
goto exit_done;
}
dev_dbg(wc68->dev, "%s: Interrupt enables: %d, %d, %d, %d, %d\n",
__func__, val[0], val[1], val[2], val[3], val[4]);
/* Clear the interrupts */
ret = wc68_reg8_set(wc68, INTR_CLR_0, 0);
if (ret)
goto exit_done;
exit_done:
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static int wc68_irq_init(struct wc68_charger *wc68,
struct i2c_client *client)
{
const struct wc68_platform_data *pdata = wc68->pdata;
int ret, irq;
u16 cmd[4];
u8 val[5];
irq = gpio_to_irq(pdata->irq_gpio);
ret = gpio_request_one(pdata->irq_gpio, GPIOF_IN, client->name);
if (ret < 0)
goto fail;
ret = request_threaded_irq(irq, NULL, wc68_interrupt_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, wc68);
if (ret < 0)
goto fail_gpio;
cmd[0] = cpu_to_be16(INTR_EN_0);
cmd[1] = VBAT_OVP_INTR_MSK | CBUS_OCP_INTR_MSK;
cmd[2] = 0;
cmd[3] = 0;
ret = wc68_i2c_write(wc68->client, &cmd[0], 7);
if (ret < 0) {
dev_err(wc68->dev, "%s: Error enabling interrupts: %d\n",
__func__, ret);
goto fail_write;
}
cmd[0] = cpu_to_be16(INTR_EN_0);
ret = wc68_i2c_read(wc68->client, &cmd[0], 2, &val[0], 5);
if (ret < 0) {
dev_err(wc68->dev, "%s: Error reading interrupts enable: %d\n",
__func__, ret);
goto fail_write;
}
dev_info(wc68->dev, "%s: Interrupt enables: %d, %d, %d, %d, %d\n",
__func__, val[0], val[1], val[2], val[3], val[4]);
cmd[0] = cpu_to_be16(INTR_CLR_0);
cmd[1] = cmd[2] = cmd[3] = 0;
ret = wc68_i2c_write(wc68->client, &cmd[0], 7);
if (ret < 0) {
dev_err(wc68->dev, "%s: Error clearing interrupts: %d\n",
__func__, ret);
goto fail_write;
}
client->irq = irq;
return 0;
fail_write:
free_irq(irq, wc68);
fail_gpio:
gpio_free(pdata->irq_gpio);
fail:
client->irq = 0;
return ret;
}
/* Returns the input current limit programmed into the charger in uA. */
int wc68_input_current_limit(struct wc68_charger *wc68)
{
int ret;
u16 val;
if (!wc68->mains_online)
return -ENODATA;
ret = wc68_reg16_get(wc68, CBUS_OCP_WARN_THRES, &val);
if (ret < 0) {
dev_err(wc68->dev, "Error reading CBUS_OCP_WARN_THRES: %d\n", ret);
return ret;
}
val = val * IIN_STEP;
return val;
}
/* Returns the constant charge current requested from GCPM */
static int get_const_charge_current(struct wc68_charger *wc68)
{
/* Charging current cannot be controlled directly */
return wc68->cc_max;
}
/* Return the constant charge voltage programmed into the charger in uV. */
static int wc68_const_charge_voltage(struct wc68_charger *wc68)
{
u16 val;
int conv;
int ret;
if (!wc68->mains_online)
return -ENODATA;
ret = wc68_reg16_get(wc68, VBAT_OVP_WARN_THRES, &val);
if (ret < 0) {
dev_err(wc68->dev, "Error reading VBAT_OVP_WARN_THRES: %d\n", ret);
return ret;
}
conv = val * VFLOAT_STEP;
return conv;
}
#define get_boot_sec() div_u64(ktime_to_ns(ktime_get_boottime()), NSEC_PER_SEC)
/* index is the PPS source to use */
static int wc68_set_charging_enabled(struct wc68_charger *wc68, int index)
{
if (index < 0 || index >= PPS_INDEX_MAX)
return -EINVAL;
mutex_lock(&wc68->lock);
/* Done is detected in CV when iin goes UNDER topoff. */
if (wc68->charging_state == DC_STATE_CHARGING_DONE)
index = 0;
if (index == 0) {
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: stop pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, wc68->pps_index, index,
wc68->charging_state,
wc68->timer_id);
/* this is the same as stop charging */
wc68->pps_index = 0;
cancel_delayed_work(&wc68->timer_work);
cancel_delayed_work(&wc68->pps_work);
/* will call wc68_stop_charging() in timer_work() */
wc68->timer_id = TIMER_ID_NONE;
wc68->timer_period = 0;
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
} else if (wc68->charging_state == DC_STATE_NO_CHARGING) {
logbuffer_prlog(wc68, LOGLEVEL_DEBUG,
"%s: start pps_idx=%d->%d charging_state=%d timer_id=%d",
__func__, wc68->pps_index, index,
wc68->charging_state,
wc68->timer_id);
/* Start Direct Charging on Index */
wc68->dc_start_time = get_boot_sec();
wc68_chg_stats_init(&wc68->chg_data);
wc68->pps_index = index;
dev_info(wc68->dev, "%s: charging_state=%u->%u\n", __func__,
wc68->charging_state, DC_STATE_CHECK_VBAT);
/* PD is already in PE_SNK_STATE */
wc68->charging_state = DC_STATE_CHECK_VBAT;
wc68->timer_id = TIMER_VBATMIN_CHECK;
wc68->timer_period = 0;
mod_delayed_work(wc68->dc_wq, &wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
/* Set the initial charging step */
power_supply_changed(wc68->mains);
}
mutex_unlock(&wc68->lock);
return 0;
}
static int wc68_mains_set_property(struct power_supply *psy,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct wc68_charger *wc68 = power_supply_get_drvdata(psy);
int ret = 0;
dev_dbg(wc68->dev, "%s: =========START=========\n", __func__);
dev_dbg(wc68->dev, "%s: prop=%d, val=%d\n", __func__, prop, val->intval);
if (!wc68->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
if (val->intval == 0) {
ret = wc68_stop_charging(wc68);
if (ret < 0)
dev_err(wc68->dev, "%s: cannot stop charging (%d)\n",
__func__, ret);
wc68->mains_online = false;
/* Reset DC Chg un-avail on disconnect */
if (!wc68->dc_avail)
wc68->dc_avail = gvotable_election_get_handle(VOTABLE_DC_CHG_AVAIL);
if (wc68->dc_avail) {
ret = gvotable_cast_int_vote(wc68->dc_avail,
REASON_DC_DRV, 1, 1);
if (ret < 0)
dev_err(wc68->dev,
"Unable to cast vote for DC Chg avail (%d)\n",
ret);
}
} else if (wc68->mains_online == false) {
wc68->mains_online = true;
}
break;
/* TODO: locking is wrong */
case GBMS_PROP_CHARGING_ENABLED:
ret = wc68_set_charging_enabled(wc68, val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = wc68_set_new_vfloat(wc68, 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 = wc68_set_new_cc_max(wc68, val->intval);
break;
/* CURRENT MAX, same as IIN is really only set by the algo */
case POWER_SUPPLY_PROP_CURRENT_MAX:
dev_dbg(wc68->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(&wc68->lock);
ret = wc68_set_new_iin(wc68, val->intval);
mutex_unlock(&wc68->lock);
break;
case GBMS_PROP_CHARGE_DISABLE:
break;
default:
ret = -EINVAL;
break;
}
dev_dbg(wc68->dev, "%s: End, ret=%d\n", __func__, ret);
return ret;
}
static int wc68_mains_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct wc68_charger *wc68 = power_supply_get_drvdata(psy);
union gbms_charger_state chg_state;
int intval, rc, ret = 0;
if (!wc68->init_done)
return -EAGAIN;
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = wc68->mains_online;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = wc68_is_present(wc68);
if (val->intval < 0)
val->intval = 0;
break;
case GBMS_PROP_CHARGE_DISABLE:
ret = wc68_get_charging_enabled(wc68);
if (ret < 0)
return ret;
val->intval = !ret;
break;
case GBMS_PROP_CHARGING_ENABLED:
ret = wc68_get_charging_enabled(wc68);
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 = wc68_const_charge_voltage(wc68);
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(wc68);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = wc68_input_current_limit(wc68);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* return the output current - uA unit */
rc = wc68_get_iin(wc68, &val->intval);
if (rc < 0)
dev_err(wc68->dev, "Invalid IIN ADC (%d)\n", rc);
break;
case GBMS_PROP_CHARGE_CHARGER_STATE:
ret = wc68_get_chg_chgr_state(wc68, &chg_state);
if (ret < 0)
return ret;
gbms_propval_int64val(val) = chg_state.v;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
intval = wc68_read_adc(wc68, ADCCH_VOUT);
if (intval < 0)
return intval;
val->intval = intval;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
intval = wc68_read_adc(wc68, ADCCH_VBAT);
if (intval < 0)
return intval;
val->intval = intval;
break;
/* TODO: read NTC temperature? */
case POWER_SUPPLY_PROP_TEMP:
val->intval = wc68_read_adc(wc68, ADCCH_DIETEMP);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = wc68_get_charge_type(wc68);
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = wc68_get_status(wc68);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = wc68_input_current_limit(wc68);
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 wc68_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 wc68_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 wc68_mains_desc = {
.name = "dc-mains",
/* b/179246019 will not look online to Android */
.type = POWER_SUPPLY_TYPE_UNKNOWN,
.get_property = wc68_mains_get_property,
.set_property = wc68_mains_set_property,
.properties = wc68_mains_properties,
.property_is_writeable = wc68_mains_is_writeable,
.num_properties = ARRAY_SIZE(wc68_mains_properties),
};
#if IS_ENABLED(CONFIG_OF)
static int of_wc68_dt(struct device *dev,
struct wc68_platform_data *pdata)
{
struct device_node *np_wc68 = dev->of_node;
int ret;
if(!np_wc68)
return -EINVAL;
/* irq gpio */
pdata->irq_gpio = of_get_named_gpio(np_wc68, "wc68,irq-gpio", 0);
dev_info(dev, "irq-gpio: %d \n", pdata->irq_gpio);
/* input current limit */
ret = of_property_read_u32(np_wc68, "wc68,input-current-limit",
&pdata->iin_cfg_max);
if (ret) {
dev_warn(dev, "wc68,input-current-limit is Empty\n");
pdata->iin_cfg_max = WC68_IIN_CFG_DFT;
}
pdata->iin_cfg = pdata->iin_cfg_max;
dev_info(dev, "wc68,iin_cfg is %u\n", pdata->iin_cfg);
/* TA max voltage limit */
ret = of_property_read_u32(np_wc68, "wc68,ta-max-vol",
&pdata->ta_max_vol);
if (ret) {
dev_warn(dev, "wc68,ta-max-vol is Empty\n");
pdata->ta_max_vol = WC68_TA_MAX_VOL;
}
ret = of_property_read_u32(np_wc68, "wc68,ta-max-vol-cp",
&pdata->ta_max_vol_cp);
if (ret) {
dev_warn(dev, "wc68,ta-max-vol-cp is Empty\n");
pdata->ta_max_vol_cp = pdata->ta_max_vol;
}
/* charging float voltage */
ret = of_property_read_u32(np_wc68, "wc68,float-voltage",
&pdata->v_float_dt);
if (ret) {
dev_warn(dev, "wc68,float-voltage is Empty\n");
pdata->v_float_dt = WC68_VFLOAT_DFT;
}
pdata->v_float = pdata->v_float_dt;
dev_info(dev, "wc68,v_float is %u\n", pdata->v_float);
/* input topoff current */
ret = of_property_read_u32(np_wc68, "wc68,input-itopoff",
&pdata->iin_topoff);
if (ret) {
dev_warn(dev, "wc68,input-itopoff is Empty\n");
pdata->iin_topoff = WC68_IIN_DONE_DFT;
}
dev_info(dev, "wc68,iin_topoff is %u\n", pdata->iin_topoff);
/* iin offsets */
ret = of_property_read_u32(np_wc68, "wc68,iin-max-offset",
&pdata->iin_max_offset);
if (ret)
pdata->iin_max_offset = WC68_IIN_MAX_OFFSET;
dev_info(dev, "wc68,iin_max_offset is %u\n", pdata->iin_max_offset);
ret = of_property_read_u32(np_wc68, "wc68,iin-cc_comp-offset",
&pdata->iin_cc_comp_offset);
if (ret)
pdata->iin_cc_comp_offset = WC68_IIN_CC_COMP_OFFSET;
dev_info(dev, "wc68,iin_cc_comp_offset is %u\n", pdata->iin_cc_comp_offset);
/* irdrop limits */
pdata->irdrop_limit_cnt =
of_property_count_elems_of_size(np_wc68, "google,irdrop-limits", sizeof(u32));
if (pdata->irdrop_limit_cnt < WC68_IRDROP_LIMIT_CNT) {
dev_info(dev, "google,irdrop-limits size get failed, use default irdrop limits %d\n",
pdata->irdrop_limit_cnt);
ret = -EINVAL;
} else {
ret = of_property_read_u32_array(np_wc68, "google,irdrop-limits",
(u32 *)pdata->irdrop_limits,
WC68_IRDROP_LIMIT_CNT);
if (ret)
dev_info(dev, "google,irdrop-limits get failed, use default irdrop limits");
}
if (ret) {
pdata->irdrop_limits[0] = WC68_IRDROP_LIMIT_TIER1;
pdata->irdrop_limits[1] = WC68_IRDROP_LIMIT_TIER2;
pdata->irdrop_limits[2] = WC68_IRDROP_LIMIT_TIER3;
}
pdata->wc68_irdrop = of_property_read_bool(np_wc68, "google,wc68-irdrop");
if (pdata->wc68_irdrop)
pr_info("google,wc68-irdrop is set, run irdrop in wc68\n");
#if IS_ENABLED(CONFIG_THERMAL)
/* USBC thermal zone */
ret = of_property_read_string(np_wc68, "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_wc68_dt(struct device *dev,
struct wc68_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_THERMAL)
static int wc68_usb_tz_read_temp(struct thermal_zone_device *tzd, int *temp)
{
struct wc68_charger *wc68 = tzd->devdata;
if (!wc68)
return -ENODEV;
*temp = wc68_read_adc(wc68, ADCCH_NTC);
return 0;
}
static struct thermal_zone_device_ops wc68_usb_tzd_ops = {
.get_temp = wc68_usb_tz_read_temp,
};
#endif
static int debug_apply_offsets(void *data, u64 val)
{
struct wc68_charger *chip = data;
int ret;
ret = wc68_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 wc68_charger *wc68 = data;
*val = wc68_read_adc(data, wc68->debug_adc_channel);
return 0;
}
static int debug_adc_chan_set(void *data, u64 val)
{
struct wc68_charger *wc68 = data;
if (val < ADCCH_VOUT || val >= ADCCH_MAX)
return -EINVAL;
wc68->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 wc68_charger *wc68 = data;
*val = wc68->pps_index;
return 0;
}
static int debug_pps_index_set(void *data, u64 val)
{
struct wc68_charger *wc68 = data;
return wc68_set_charging_enabled(wc68, (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 wc68_charger *wc68 = i2c_get_clientdata(client);
struct wc68_chg_stats *chg_data = &wc68->chg_data;
const int max_size = PAGE_SIZE;
int len = -ENODATA;
mutex_lock(&wc68->lock);
if (!wc68_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(&wc68->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 wc68_charger *wc68 = i2c_get_clientdata(client);
mutex_lock(&wc68->lock);
wc68_chg_stats_init(&wc68->chg_data);
mutex_unlock(&wc68->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 wc68_charger *wc68 = dev_get_drvdata(dev);
u8 tmp[FWREG_MAX_REGISTER - FWREG_CHIP_ID_REG + 1];
int ret = 0, i;
int len = 0;
u16 cmd = cpu_to_be16(FWREG_CHIP_ID_REG);
ret = wc68_i2c_read(wc68->client, &cmd, 2, &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 int wc68_create_fs_entries(struct wc68_charger *chip)
{
device_create_file(chip->dev, &dev_attr_chg_stats);
device_create_file(chip->dev, &dev_attr_registers_dump);
chip->debug_root = debugfs_create_dir("charger-wc68", 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);
chip->debug_count = 1; /* Read 1 byte by default */
debugfs_create_file("data", 0644, chip->debug_root, chip, &register_debug_ops_wc68);
debugfs_create_x32("address", 0644, chip->debug_root, &chip->debug_address);
debugfs_create_x32("count", 0644, chip->debug_root, &chip->debug_count);
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 wc68_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
static char *battery[] = { "wc68-battery" };
struct power_supply_config mains_cfg = {};
struct wc68_platform_data *pdata;
struct wc68_charger *wc68_chg;
struct device *dev = &client->dev;
const char *psy_name = NULL;
int ret;
dev_dbg(dev, "%s: =========START=========\n", __func__);
wc68_chg = devm_kzalloc(dev, sizeof(*wc68_chg), GFP_KERNEL);
if (!wc68_chg)
return -ENOMEM;
#if IS_ENABLED(CONFIG_OF)
if (client->dev.of_node) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct wc68_platform_data),
GFP_KERNEL);
if (!pdata)
return -ENOMEM;
ret = of_wc68_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, wc68_chg);
wc68_chg->client = client;
mutex_init(&wc68_chg->lock);
wc68_chg->dev = &client->dev;
wc68_chg->pdata = pdata;
wc68_chg->charging_state = DC_STATE_NO_CHARGING;
wc68_chg->wlc_ramp_out_iin = true;
wc68_chg->wlc_ramp_out_vout_target = 15300000; /* 15.3V as default */
wc68_chg->wlc_ramp_out_delay = 300; /* 300 ms default */
wc68_chg->hw_init_done = false;
/* Create a work queue for the direct charger */
wc68_chg->dc_wq = alloc_ordered_workqueue("wc68_dc_wq", WQ_MEM_RECLAIM);
if (wc68_chg->dc_wq == NULL) {
dev_err(wc68_chg->dev, "failed to create work queue\n");
return -ENOMEM;
}
wc68_chg->monitor_wake_lock =
wakeup_source_register(NULL, "wc68-charger-monitor");
if (!wc68_chg->monitor_wake_lock) {
dev_err(dev, "Failed to register wakeup source\n");
return -ENODEV;
}
/* initialize work */
INIT_DELAYED_WORK(&wc68_chg->timer_work, wc68_timer_work);
wc68_chg->timer_id = TIMER_ID_NONE;
wc68_chg->timer_period = 0;
INIT_DELAYED_WORK(&wc68_chg->pps_work, wc68_pps_request_work);
INIT_DELAYED_WORK(&wc68_chg->init_hw_work, wc68_init_hw_work);
ret = of_property_read_string(dev->of_node,
"wc68,psy_name", &psy_name);
ret = wc68_probe_pps(wc68_chg);
if (ret < 0) {
dev_warn(dev, "wc68: PPS not available (%d)\n", ret);
} else {
const char *logname = "wc68";
wc68_chg->log = logbuffer_register(logname);
if (IS_ERR(wc68_chg->log)) {
dev_err(dev, "no logbuffer (%ld)\n", PTR_ERR(wc68_chg->log));
wc68_chg->log = NULL;
}
}
ret = wc68_hw_ping(wc68_chg);
if (ret < 0)
goto error;
schedule_delayed_work(&wc68_chg->init_hw_work, 0);
mains_cfg.supplied_to = battery;
mains_cfg.num_supplicants = ARRAY_SIZE(battery);
mains_cfg.drv_data = wc68_chg;
wc68_chg->mains = devm_power_supply_register(dev,
&wc68_mains_desc,
&mains_cfg);
if (IS_ERR(wc68_chg->mains)) {
ret = -ENODEV;
goto error;
}
wc68_chg->attrs.attrs = wc_attr_group;
ret = wc68_create_fs_entries(wc68_chg);
if (ret < 0)
dev_err(dev, "error while registering debugfs %d\n", ret);
#if IS_ENABLED(CONFIG_THERMAL)
if (pdata->usb_tz_name) {
wc68_chg->usb_tzd =
thermal_zone_device_register(pdata->usb_tz_name, 0, 0,
wc68_chg,
&wc68_usb_tzd_ops,
NULL, 0, 0);
if (IS_ERR(wc68_chg->usb_tzd)) {
wc68_chg->usb_tzd = NULL;
ret = PTR_ERR(wc68_chg->usb_tzd);
dev_err(dev, "Couldn't register usb connector thermal zone ret=%d\n",
ret);
}
}
#endif
wc68_chg->dc_avail = NULL;
wc68_chg->init_done = true;
dev_info(dev, "wc68: probe_done\n");
return 0;
error:
destroy_workqueue(wc68_chg->dc_wq);
mutex_destroy(&wc68_chg->lock);
wakeup_source_unregister(wc68_chg->monitor_wake_lock);
return ret;
}
static int wc68_remove(struct i2c_client *client)
{
struct wc68_charger *wc68_chg = i2c_get_clientdata(client);
/* stop charging if it is active */
wc68_stop_charging(wc68_chg);
if (client->irq) {
free_irq(client->irq, wc68_chg);
gpio_free(wc68_chg->pdata->irq_gpio);
}
destroy_workqueue(wc68_chg->dc_wq);
wakeup_source_unregister(wc68_chg->monitor_wake_lock);
#if IS_ENABLED(CONFIG_THERMAL)
if (wc68_chg->usb_tzd)
thermal_zone_device_unregister(wc68_chg->usb_tzd);
#endif
if (wc68_chg->log)
logbuffer_unregister(wc68_chg->log);
pps_free(&wc68_chg->pps_data);
return 0;
}
static const struct i2c_device_id wc68_id[] = {
{ "STM_WC", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wc68_id);
#if IS_ENABLED(CONFIG_OF)
static struct of_device_id wc68_i2c_dt_ids[] = {
{ .compatible = "st_wc68",},
{ },
};
MODULE_DEVICE_TABLE(of, wc68_i2c_dt_ids);
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_PM)
#if IS_ENABLED(CONFIG_RTC_HCTOSYS)
static int get_current_time(struct wc68_charger *wc68, 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(wc68->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(wc68->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(wc68->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
wc68_check_and_update_charging_timer(struct wc68_charger *wc68)
{
unsigned long current_time = 0, next_update_time, time_left;
get_current_time(wc68, &current_time);
if (wc68->timer_id != TIMER_ID_NONE) {
next_update_time = wc68->last_update_time +
(wc68->timer_period / 1000); /* seconds */
dev_dbg(wc68->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(&wc68->lock);
wc68->timer_period = time_left * 1000; /* ms unit */
mutex_unlock(&wc68->lock);
schedule_delayed_work(&wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
dev_dbg(wc68->dev, "%s: timer_id=%d, time_period=%ld\n", __func__,
wc68->timer_id, wc68->timer_period);
}
wc68->last_update_time = current_time;
}
#endif
static int wc68_suspend(struct device *dev)
{
struct wc68_charger *wc68 = dev_get_drvdata(dev);
dev_dbg(wc68->dev, "%s: cancel delayed work\n", __func__);
/* cancel delayed_work */
cancel_delayed_work(&wc68->timer_work);
return 0;
}
static int wc68_resume(struct device *dev)
{
struct wc68_charger *wc68 = dev_get_drvdata(dev);
dev_dbg(wc68->dev, "%s: update_timer\n", __func__);
/* Update the current timer */
#if IS_ENABLED(CONFIG_RTC_HCTOSYS)
wc68_check_and_update_charging_timer(wc68);
#else
if (wc68->timer_id != TIMER_ID_NONE) {
mutex_lock(&wc68->lock);
wc68->timer_period = 0; /* ms unit */
mutex_unlock(&wc68->lock);
schedule_delayed_work(&wc68->timer_work,
msecs_to_jiffies(wc68->timer_period));
}
#endif
return 0;
}
#else
#define wc68_suspend NULL
#define wc68_resume NULL
#endif
static const struct dev_pm_ops wc68_pm_ops = {
.suspend = wc68_suspend,
.resume = wc68_resume,
};
static struct i2c_driver wc68_driver = {
.driver = {
.name = "STM_WC",
#if IS_ENABLED(CONFIG_OF)
.of_match_table = wc68_i2c_dt_ids,
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_PM)
.pm = &wc68_pm_ops,
#endif
},
.probe = wc68_probe,
.remove = wc68_remove,
.id_table = wc68_id,
};
module_i2c_driver(wc68_driver);
MODULE_AUTHOR("[email protected]");
MODULE_AUTHOR("[email protected]");
MODULE_DESCRIPTION("ST WC68 Direct Charger Driver");
MODULE_LICENSE("GPL");