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chromium/chromiumos/platform/ec/127521b109be8aac352e80e319e46ed123360408/./driver/charger/bd9995x.c
blob: 2531d4225d3678b54b5fc97d2b42397bbecd529b [file] [log] [blame]
/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* ROHM BD9995X battery charger driver.
*/
#include "battery.h"
#include "battery_smart.h"
#include "bd9995x.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "charger.h"
#include "console.h"
#include "ec_commands.h"
#include "hooks.h"
#include "i2c.h"
#include "task.h"
#include "time.h"
#include "util.h"
#include "usb_charge.h"
#include "usb_pd.h"
#define OTPROM_LOAD_WAIT_RETRY 3
#define BD9995X_CHARGE_PORT_COUNT 2
/*
* BC1.2 detection starts 100ms after VBUS/VCC attach and typically
* completes 312ms after VBUS/VCC attach.
*/
#define BC12_DETECT_US (312*MSEC)
#define BD9995X_VSYS_PRECHARGE_OFFSET_MV 200
/* Console output macros */
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
#ifdef CONFIG_BD9995X_DELAY_INPUT_PORT_SELECT
/*
* Used in a check to determine if VBUS is within the
* range of some VOLTAGE +/- VBUS_DELTA, where voltage
* is measured in mV.
*/
#define VBUS_DELTA 1000
/* VBUS is debounced if it's stable for this length of time */
#define VBUS_MSEC (100*MSEC)
/* VBUS debouncing sample interval */
#define VBUS_CHECK_MSEC (10*MSEC)
/* Time to wait before VBUS debouncing begins */
#define STABLE_TIMEOUT (500*MSEC)
/* Maximum time to wait until VBUS is debounced */
#define DEBOUNCE_TIMEOUT (500*MSEC)
enum vstate {START, STABLE, DEBOUNCE};
static enum vstate vbus_state;
static int vbus_voltage;
static uint64_t debounce_time;
static uint64_t vbus_timeout;
static int port_update;
static int select_update;
static int select_input_port_update;
#endif
/* Charger parameters */
static const struct charger_info bd9995x_charger_info = {
.name = CHARGER_NAME,
.voltage_max = CHARGE_V_MAX,
.voltage_min = CHARGE_V_MIN,
.voltage_step = CHARGE_V_STEP,
.current_max = CHARGE_I_MAX,
.current_min = CHARGE_I_MIN,
.current_step = CHARGE_I_STEP,
.input_current_max = INPUT_I_MAX,
.input_current_min = INPUT_I_MIN,
.input_current_step = INPUT_I_STEP,
};
/* Charge command code map */
static enum bd9995x_command charger_map_cmd = BD9995X_INVALID_COMMAND;
/* Mutex for active register set control. */
static struct mutex bd9995x_map_mutex;
/* Tracks the state of VSYS_PRIORITY */
static int vsys_priority;
/* Mutex for VIN_CTRL_SET register */
static struct mutex bd9995x_vin_mutex;
#ifdef HAS_TASK_USB_CHG
/* USB switch */
static enum usb_switch usb_switch_state[BD9995X_CHARGE_PORT_COUNT] = {
USB_SWITCH_DISCONNECT,
USB_SWITCH_DISCONNECT,
};
static enum ec_error_list bd9995x_set_current(int chgnum, int current);
static enum ec_error_list bd9995x_set_voltage(int chgnum, int voltage);
/*
* The USB Type-C specification limits the maximum amount of current from BC 1.2
* suppliers to 1.5A. Technically, proprietary methods are not allowed, but we
* will continue to allow those.
*/
static int bd9995x_get_bc12_ilim(int charge_supplier)
{
switch (charge_supplier) {
case CHARGE_SUPPLIER_BC12_CDP:
return USB_CHARGER_MAX_CURR_MA;
case CHARGE_SUPPLIER_BC12_DCP:
return USB_CHARGER_MAX_CURR_MA;
case CHARGE_SUPPLIER_BC12_SDP:
return 900;
case CHARGE_SUPPLIER_OTHER:
#ifdef CONFIG_CHARGE_RAMP_SW
return USB_CHARGER_MAX_CURR_MA;
#else
/*
* Setting the higher limit of current may result in an
* anti-collapse hence limiting the current to 1A.
*/
return 1000;
#endif
default:
return 500;
}
}
#endif /* HAS_TASK_USB_CHG */
static inline enum ec_error_list ch_raw_read16(int chgnum, int cmd, int *param,
enum bd9995x_command map_cmd)
{
int rv;
/* Map the Charge command code to appropriate region */
mutex_lock(&bd9995x_map_mutex);
if (charger_map_cmd != map_cmd) {
rv = i2c_write16(chg_chips[chgnum].i2c_port,
chg_chips[chgnum].i2c_addr_flags,
BD9995X_CMD_MAP_SET, map_cmd);
if (rv) {
charger_map_cmd = BD9995X_INVALID_COMMAND;
goto bd9995x_read_cleanup;
}
charger_map_cmd = map_cmd;
}
rv = i2c_read16(chg_chips[chgnum].i2c_port,
chg_chips[chgnum].i2c_addr_flags,
cmd, param);
bd9995x_read_cleanup:
mutex_unlock(&bd9995x_map_mutex);
return rv;
}
static inline enum ec_error_list ch_raw_write16(int chgnum, int cmd, int param,
enum bd9995x_command map_cmd)
{
int rv;
/* Map the Charge command code to appropriate region */
mutex_lock(&bd9995x_map_mutex);
if (charger_map_cmd != map_cmd) {
rv = i2c_write16(chg_chips[chgnum].i2c_port,
chg_chips[chgnum].i2c_addr_flags,
BD9995X_CMD_MAP_SET, map_cmd);
if (rv) {
charger_map_cmd = BD9995X_INVALID_COMMAND;
goto bd9995x_write_cleanup;
}
charger_map_cmd = map_cmd;
}
rv = i2c_write16(chg_chips[chgnum].i2c_port,
chg_chips[chgnum].i2c_addr_flags,
cmd, param);
bd9995x_write_cleanup:
mutex_unlock(&bd9995x_map_mutex);
return rv;
}
/* BD9995X local interfaces */
static int bd9995x_set_vfastchg(int chgnum, int voltage)
{
int rv;
/* Fast Charge Voltage Regulation Settings for fast charging. */
rv = ch_raw_write16(chgnum, BD9995X_CMD_VFASTCHG_REG_SET1,
voltage & 0x7FF0, BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
#ifndef CONFIG_CHARGER_BATTERY_TSENSE
/*
* If TSENSE is not connected set all the VFASTCHG_REG_SETx
* to same voltage.
*/
rv = ch_raw_write16(chgnum, BD9995X_CMD_VFASTCHG_REG_SET2,
voltage & 0x7FF0, BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
rv = ch_raw_write16(chgnum, BD9995X_CMD_VFASTCHG_REG_SET3,
voltage & 0x7FF0, BD9995X_EXTENDED_COMMAND);
#endif
return rv;
}
static int bd9995x_set_vsysreg(int chgnum, int voltage)
{
/* VSYS Regulation voltage is in 64mV steps. */
voltage &= ~0x3F;
return ch_raw_write16(chgnum, BD9995X_CMD_VSYSREG_SET, voltage,
BD9995X_EXTENDED_COMMAND);
}
static int bd9995x_is_discharging_on_ac(int chgnum)
{
int reg;
if (ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_SET2, &reg,
BD9995X_EXTENDED_COMMAND))
return 0;
return !!(reg & BD9995X_CMD_CHGOP_SET2_BATT_LEARN);
}
static int bd9995x_charger_enable(int chgnum, int enable)
{
int rv, reg;
static int prev_chg_enable = -1;
const struct battery_info *bi = battery_get_info();
#ifdef CONFIG_CHARGER_BD9995X_CHGEN
/*
* If the battery is not yet initialized, dont turn-off the BGATE so
* that voltage from the AC is applied to the battery PACK.
*/
if (!enable && !board_battery_initialized())
return EC_SUCCESS;
#endif
/* Nothing to change */
if (enable == prev_chg_enable)
return EC_SUCCESS;
prev_chg_enable = enable;
if (enable) {
/*
* BGATE capacitor max : 0.1uF + 20%
* Charge MOSFET threshold max : 2.8V
* BGATE charge pump current min : 3uA
* T = C * V / I so, Tmax = 112ms
*/
msleep(115);
/*
* Set VSYSREG_SET <= VBAT so that the charger is in Fast-Charge
* state when charging.
*/
rv = bd9995x_set_vsysreg(chgnum, bi->voltage_min);
} else {
/*
* Set VSYSREG_SET > VBAT so that the charger is in Pre-Charge
* state when not charging or discharging.
*/
rv = bd9995x_set_vsysreg(chgnum, bi->voltage_max +
BD9995X_VSYS_PRECHARGE_OFFSET_MV);
/*
* Allow charger in pre-charge state for 50ms before disabling
* the charger which prevents inrush current while moving from
* fast-charge state to pre-charge state.
*/
msleep(50);
}
if (rv)
return rv;
rv = ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_SET2, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
if (enable)
reg |= BD9995X_CMD_CHGOP_SET2_CHG_EN;
else
reg &= ~BD9995X_CMD_CHGOP_SET2_CHG_EN;
return ch_raw_write16(chgnum, BD9995X_CMD_CHGOP_SET2, reg,
BD9995X_EXTENDED_COMMAND);
}
static int bd9995x_por_reset(int chgnum)
{
int rv;
int reg;
int i;
rv = ch_raw_write16(chgnum, BD9995X_CMD_SYSTEM_CTRL_SET,
BD9995X_CMD_SYSTEM_CTRL_SET_OTPLD |
BD9995X_CMD_SYSTEM_CTRL_SET_ALLRST,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/* Wait until OTPROM loading is finished */
for (i = 0; i < OTPROM_LOAD_WAIT_RETRY; i++) {
msleep(10);
rv = ch_raw_read16(chgnum, BD9995X_CMD_SYSTEM_STATUS, &reg,
BD9995X_EXTENDED_COMMAND);
if (!rv && (reg & BD9995X_CMD_SYSTEM_STATUS_OTPLD_STATE) &&
(reg & BD9995X_CMD_SYSTEM_STATUS_ALLRST_STATE))
break;
}
if (rv)
return rv;
if (i == OTPROM_LOAD_WAIT_RETRY)
return EC_ERROR_TIMEOUT;
return ch_raw_write16(chgnum, BD9995X_CMD_SYSTEM_CTRL_SET, 0,
BD9995X_EXTENDED_COMMAND);
}
static int bd9995x_reset_to_zero(int chgnum)
{
int rv;
rv = bd9995x_set_current(chgnum, 0);
if (rv)
return rv;
return bd9995x_set_voltage(chgnum, 0);
}
static int bd9995x_get_charger_op_status(int chgnum, int *status)
{
return ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_STATUS, status,
BD9995X_EXTENDED_COMMAND);
}
#ifdef HAS_TASK_USB_CHG
static int bc12_detected_type[CONFIG_USB_PD_PORT_MAX_COUNT];
/* Mutex for UCD_SET registers, lock before read / mask / write. */
static struct mutex ucd_set_mutex[BD9995X_CHARGE_PORT_COUNT];
static int bd9995x_get_bc12_device_type(int chgnum, int port)
{
int rv;
int reg;
rv = ch_raw_read16(chgnum, (port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_VBUS_UCD_STATUS :
BD9995X_CMD_VCC_UCD_STATUS,
&reg, BD9995X_EXTENDED_COMMAND);
if (rv)
return CHARGE_SUPPLIER_NONE;
switch (reg & BD9995X_TYPE_MASK) {
case BD9995X_TYPE_CDP:
return CHARGE_SUPPLIER_BC12_CDP;
case BD9995X_TYPE_DCP:
return CHARGE_SUPPLIER_BC12_DCP;
case BD9995X_TYPE_SDP:
return CHARGE_SUPPLIER_BC12_SDP;
case BD9995X_TYPE_PUP_PORT:
case BD9995X_TYPE_OTHER:
return CHARGE_SUPPLIER_OTHER;
case BD9995X_TYPE_OPEN_PORT:
case BD9995X_TYPE_VBUS_OPEN:
default:
return CHARGE_SUPPLIER_NONE;
}
}
/*
* Do safe read / mask / write of BD9995X_CMD_*_UCD_SET register.
* The USB charger task owns all bits of this register, except for bit 0
* (BD9995X_CMD_UCD_SET_USB_SW), which is controlled by
* usb_charger_set_switches().
*/
static int bd9995x_update_ucd_set_reg(int chgnum, int port, uint16_t mask,
int set)
{
int rv;
int reg;
int port_reg = (port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_VBUS_UCD_SET : BD9995X_CMD_VCC_UCD_SET;
mutex_lock(&ucd_set_mutex[port]);
rv = ch_raw_read16(chgnum, port_reg, &reg, BD9995X_EXTENDED_COMMAND);
if (!rv) {
if (set)
reg |= mask;
else
reg &= ~mask;
rv = ch_raw_write16(chgnum, port_reg, reg,
BD9995X_EXTENDED_COMMAND);
}
mutex_unlock(&ucd_set_mutex[port]);
return rv;
}
static int bd9995x_bc12_check_type(int chgnum, int port)
{
int bc12_type;
struct charge_port_info charge;
int vbus_provided = bd9995x_is_vbus_provided(port) &&
!usb_charger_port_is_sourcing_vbus(port);
/*
* If vbus is no longer provided, then no need to continue. Return 0 so
* that a wait event is not scheduled.
*/
if (!vbus_provided)
return 0;
/* get device type */
bc12_type = bd9995x_get_bc12_device_type(chgnum, port);
if (bc12_type == CHARGE_SUPPLIER_NONE)
/*
* Device type is not available, return non-zero so new wait
* will be scheduled before putting the task to sleep.
*/
return 1;
bc12_detected_type[port] = bc12_type;
/* Update charge manager */
charge.voltage = USB_CHARGER_VOLTAGE_MV;
charge.current = bd9995x_get_bc12_ilim(bc12_type);
charge_manager_update_charge(bc12_type, port, &charge);
return 0;
}
static void bd9995x_bc12_detach(int chgnum, int port, int type)
{
/* Update charge manager */
charge_manager_update_charge(type, port, NULL);
/* Disable charging trigger by BC1.2 detection */
bd9995x_bc12_enable_charging(port, 0);
}
static int bd9995x_enable_vbus_detect_interrupts(int chgnum, int port,
int enable)
{
int reg;
int rv;
int port_reg;
int mask_val;
/* 1st Level Interrupt Setting */
rv = ch_raw_read16(chgnum, BD9995X_CMD_INT0_SET, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
mask_val = ((port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_INT0_SET_INT1_EN :
BD9995X_CMD_INT0_SET_INT2_EN) |
BD9995X_CMD_INT0_SET_INT0_EN;
if (enable)
reg |= mask_val;
else
reg &= ~mask_val;
rv = ch_raw_write16(chgnum, BD9995X_CMD_INT0_SET, reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/* 2nd Level Interrupt Setting */
port_reg = (port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_INT1_SET : BD9995X_CMD_INT2_SET;
rv = ch_raw_read16(chgnum, port_reg, &reg, BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/* Enable threshold interrupts if we need to control discharge */
#ifdef CONFIG_USB_PD_DISCHARGE
mask_val = BD9995X_CMD_INT_VBUS_DET | BD9995X_CMD_INT_VBUS_TH;
#else
mask_val = BD9995X_CMD_INT_VBUS_DET;
#endif
if (enable)
reg |= mask_val;
else
reg &= ~mask_val;
return ch_raw_write16(chgnum, port_reg, reg, BD9995X_EXTENDED_COMMAND);
}
/* Read + clear active interrupt bits for a given port */
static int bd9995x_get_interrupts(int chgnum, int port)
{
int rv;
int reg;
int port_reg;
port_reg = (port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_INT1_STATUS : BD9995X_CMD_INT2_STATUS;
rv = ch_raw_read16(chgnum, port_reg, &reg, BD9995X_EXTENDED_COMMAND);
if (rv)
return 0;
/* Clear the interrupt status bits we just read */
ch_raw_write16(chgnum, port_reg, reg, BD9995X_EXTENDED_COMMAND);
return reg;
}
/*
* Set or clear registers necessary to do one-time BC1.2 detection.
* Pass enable = 1 to trigger BC1.2 detection, and enable = 0 once
* BC1.2 detection has completed.
*/
static int bd9995x_bc12_detect(int chgnum, int port, int enable)
{
return bd9995x_update_ucd_set_reg(chgnum, port,
BD9995X_CMD_UCD_SET_BCSRETRY |
BD9995X_CMD_UCD_SET_USBDETEN |
BD9995X_CMD_UCD_SET_USB_SW_EN,
enable);
}
static int usb_charger_process(int chgnum, int port)
{
int vbus_provided = bd9995x_is_vbus_provided(port) &&
!usb_charger_port_is_sourcing_vbus(port);
/* Inform other modules about VBUS level */
usb_charger_vbus_change(port, vbus_provided);
/*
* Do BC1.2 detection, if we have VBUS and our port is not known
* to speak PD.
*/
if (vbus_provided && !pd_capable(port)) {
bd9995x_bc12_detect(chgnum, port, 1);
/*
* Need to give the charger time (~312 mSec) before the
* bc12_type is available. The main task loop will schedule a
* task wait event which will then call bd9995x_bc12_get_type.
*/
return 1;
}
/* Reset BC1.2 regs so we don't do auto-detection. */
bd9995x_bc12_detect(chgnum, port, 0);
/*
* VBUS is no longer being provided, if the bc12_type had been
* previously determined, then need to detach.
*/
if (bc12_detected_type[port] != CHARGE_SUPPLIER_NONE) {
/* Charger/sink detached */
bd9995x_bc12_detach(chgnum, port, bc12_detected_type[port]);
bc12_detected_type[port] = CHARGE_SUPPLIER_NONE;
}
/* No need for the task to schedule a wait event */
return 0;
}
#ifdef CONFIG_CHARGE_RAMP_SW
static int bd9995x_ramp_allowed(int supplier)
{
return supplier == CHARGE_SUPPLIER_BC12_DCP ||
supplier == CHARGE_SUPPLIER_BC12_SDP ||
supplier == CHARGE_SUPPLIER_BC12_CDP ||
supplier == CHARGE_SUPPLIER_OTHER;
}
static int bd9995x_ramp_max(int supplier, int sup_curr)
{
return bd9995x_get_bc12_ilim(supplier);
}
#endif /* CONFIG_CHARGE_RAMP_SW */
#endif /* HAS_TASK_USB_CHG */
/* chip specific interfaces */
static enum ec_error_list bd9995x_set_input_current(int chgnum,
int input_current)
{
int rv;
/* Input current step 32 mA */
input_current &= ~0x1F;
if (input_current < bd9995x_charger_info.input_current_min)
input_current = bd9995x_charger_info.input_current_min;
rv = ch_raw_write16(chgnum, BD9995X_CMD_IBUS_LIM_SET, input_current,
BD9995X_BAT_CHG_COMMAND);
if (rv)
return rv;
return ch_raw_write16(chgnum, BD9995X_CMD_ICC_LIM_SET, input_current,
BD9995X_BAT_CHG_COMMAND);
}
static enum ec_error_list bd9995x_get_input_current(int chgnum,
int *input_current)
{
return ch_raw_read16(chgnum, BD9995X_CMD_CUR_ILIM_VAL, input_current,
BD9995X_EXTENDED_COMMAND);
}
static enum ec_error_list bd9995x_manufacturer_id(int chgnum, int *id)
{
return EC_ERROR_UNIMPLEMENTED;
}
static enum ec_error_list bd9995x_device_id(int chgnum, int *id)
{
return ch_raw_read16(chgnum, BD9995X_CMD_CHIP_ID, id,
BD9995X_EXTENDED_COMMAND);
}
static enum ec_error_list bd9995x_get_option(int chgnum, int *option)
{
int rv;
int reg;
rv = ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_SET1, option,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
rv = ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_SET2, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
*option |= reg << 16;
return EC_SUCCESS;
}
static enum ec_error_list bd9995x_set_option(int chgnum, int option)
{
int rv;
rv = ch_raw_write16(chgnum, BD9995X_CMD_CHGOP_SET1, option & 0xFFFF,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
return ch_raw_write16(chgnum, BD9995X_CMD_CHGOP_SET2,
(option >> 16) & 0xFFFF,
BD9995X_EXTENDED_COMMAND);
}
/* Charger interfaces */
static const struct charger_info *bd9995x_get_info(int chgnum)
{
return &bd9995x_charger_info;
}
static enum ec_error_list bd9995x_get_status(int chgnum, int *status)
{
int rv;
int reg;
int ch_status;
/* charger level */
*status = CHARGER_LEVEL_2;
/* charger enable/inhibit */
rv = ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_SET2, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
if (!(reg & BD9995X_CMD_CHGOP_SET2_CHG_EN))
*status |= CHARGER_CHARGE_INHIBITED;
/* charger alarm enable/inhibit */
rv = ch_raw_read16(chgnum, BD9995X_CMD_PROCHOT_CTRL_SET, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
if (!(reg & (BD9995X_CMD_PROCHOT_CTRL_SET_PROCHOT_EN4 |
BD9995X_CMD_PROCHOT_CTRL_SET_PROCHOT_EN3 |
BD9995X_CMD_PROCHOT_CTRL_SET_PROCHOT_EN2 |
BD9995X_CMD_PROCHOT_CTRL_SET_PROCHOT_EN1 |
BD9995X_CMD_PROCHOT_CTRL_SET_PROCHOT_EN0)))
*status |= CHARGER_ALARM_INHIBITED;
rv = bd9995x_get_charger_op_status(chgnum, &reg);
if (rv)
return rv;
/* power fail */
if (!(reg & BD9995X_CMD_CHGOP_STATUS_RBOOST_UV))
*status |= CHARGER_POWER_FAIL;
/* Safety signal ranges & battery presence */
ch_status = (reg & BD9995X_BATTTEMP_MASK) >> 8;
*status |= CHARGER_BATTERY_PRESENT;
switch (ch_status) {
case BD9995X_CMD_CHGOP_STATUS_BATTEMP_COLD1:
*status |= CHARGER_RES_COLD;
break;
case BD9995X_CMD_CHGOP_STATUS_BATTEMP_COLD2:
*status |= CHARGER_RES_COLD;
*status |= CHARGER_RES_UR;
break;
case BD9995X_CMD_CHGOP_STATUS_BATTEMP_HOT1:
case BD9995X_CMD_CHGOP_STATUS_BATTEMP_HOT2:
*status |= CHARGER_RES_HOT;
break;
case BD9995X_CMD_CHGOP_STATUS_BATTEMP_HOT3:
*status |= CHARGER_RES_HOT;
*status |= CHARGER_RES_OR;
break;
case BD9995X_CMD_CHGOP_STATUS_BATTEMP_BATOPEN:
*status &= ~CHARGER_BATTERY_PRESENT;
default:
break;
}
/* source of power */
if (bd9995x_is_vbus_provided(BD9995X_CHARGE_PORT_BOTH))
*status |= CHARGER_AC_PRESENT;
return EC_SUCCESS;
}
static enum ec_error_list bd9995x_set_mode(int chgnum, int mode)
{
int rv;
if (mode & CHARGE_FLAG_POR_RESET) {
rv = bd9995x_por_reset(chgnum);
if (rv)
return rv;
}
if (mode & CHARGE_FLAG_RESET_TO_ZERO) {
rv = bd9995x_reset_to_zero(chgnum);
if (rv)
return rv;
}
return EC_SUCCESS;
}
static enum ec_error_list bd9995x_get_current(int chgnum, int *current)
{
return ch_raw_read16(chgnum, BD9995X_CMD_CHG_CURRENT, current,
BD9995X_BAT_CHG_COMMAND);
}
static enum ec_error_list bd9995x_set_current(int chgnum, int current)
{
int rv;
int chg_enable = 1;
/* Charge current step 64 mA */
current &= ~0x3F;
if (current < BD9995X_NO_BATTERY_CHARGE_I_MIN &&
(battery_is_present() != BP_YES || battery_is_cut_off()))
current = BD9995X_NO_BATTERY_CHARGE_I_MIN;
/*
* Disable charger before setting charge current to 0 or when
* discharging on AC.
* If charging current is set to 0mA during charging, reference of
* the charge current feedback amp (VREF_CHG) is set to 0V. Hence
* the DCDC stops switching (because of the EA offset).
*/
if (!current || bd9995x_is_discharging_on_ac(chgnum)) {
chg_enable = 0;
rv = bd9995x_charger_enable(chgnum, 0);
if (rv)
return rv;
}
rv = ch_raw_write16(chgnum, BD9995X_CMD_IPRECH_SET,
MIN(current, BD9995X_IPRECH_MAX),
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
rv = ch_raw_write16(chgnum, BD9995X_CMD_CHG_CURRENT, current,
BD9995X_BAT_CHG_COMMAND);
if (rv)
return rv;
/*
* Enable charger if charge current is non-zero or not discharging
* on AC.
*/
return chg_enable ? bd9995x_charger_enable(chgnum, 1) : EC_SUCCESS;
}
static enum ec_error_list bd9995x_get_voltage(int chgnum, int *voltage)
{
if (vsys_priority) {
int batt_volt_measured;
int reg;
int rv;
/* Get battery voltage as reported by charger */
batt_volt_measured = bd9995x_get_battery_voltage();
if (batt_volt_measured > (battery_get_info()->voltage_min +
BD9995X_VSYS_PRECHARGE_OFFSET_MV)) {
/*
* Battery is not deeply discharged. Clear the
* VSYS_PRIORITY bit to ensure that input current limit
* is always active.
*/
mutex_lock(&bd9995x_vin_mutex);
if (!ch_raw_read16(chgnum, BD9995X_CMD_VIN_CTRL_SET,
&reg, BD9995X_EXTENDED_COMMAND)) {
reg &= ~BD9995X_CMD_VIN_CTRL_SET_VSYS_PRIORITY;
rv = ch_raw_write16(chgnum,
BD9995X_CMD_VIN_CTRL_SET,
reg,
BD9995X_EXTENDED_COMMAND);
/* Mirror the state of this bit */
if (!rv)
vsys_priority = 0;
}
mutex_unlock(&bd9995x_vin_mutex);
}
}
return ch_raw_read16(chgnum, BD9995X_CMD_CHG_VOLTAGE, voltage,
BD9995X_BAT_CHG_COMMAND);
}
static enum ec_error_list bd9995x_set_voltage(int chgnum, int voltage)
{
const int battery_voltage_max = battery_get_info()->voltage_max;
/*
* Regulate the system voltage to battery max if the battery
* is not present or the battery is discharging on AC.
*/
if (voltage == 0 ||
bd9995x_is_discharging_on_ac(chgnum) ||
battery_is_present() != BP_YES ||
battery_is_cut_off() ||
voltage > battery_voltage_max)
voltage = battery_voltage_max;
/* Charge voltage step 16 mV */
voltage &= ~0x0F;
/* Assumes charger's voltage_min < battery's voltage_max */
if (voltage < bd9995x_charger_info.voltage_min)
voltage = bd9995x_charger_info.voltage_min;
return bd9995x_set_vfastchg(chgnum, voltage);
}
static void bd9995x_battery_charging_profile_settings(int chgnum)
{
const struct battery_info *bi = battery_get_info();
/* Input Current Limit Setting */
bd9995x_set_input_current(chgnum, CONFIG_CHARGER_INPUT_CURRENT);
/* Charge Termination Current Setting */
ch_raw_write16(chgnum, BD9995X_CMD_ITERM_SET, 0,
BD9995X_EXTENDED_COMMAND);
/* Trickle-charge Current Setting */
ch_raw_write16(chgnum, BD9995X_CMD_ITRICH_SET,
bi->precharge_current & 0x07C0,
BD9995X_EXTENDED_COMMAND);
bd9995x_set_vfastchg(chgnum, bi->voltage_max);
/* Set Pre-charge Voltage Threshold for trickle charging. */
ch_raw_write16(chgnum, BD9995X_CMD_VPRECHG_TH_SET,
(bi->voltage_min - 1000) & 0x7FC0,
BD9995X_EXTENDED_COMMAND);
/* Re-charge Battery Voltage Setting */
ch_raw_write16(chgnum, BD9995X_CMD_VRECHG_SET,
bi->voltage_max & 0x7FF0,
BD9995X_EXTENDED_COMMAND);
/* Set battery OVP to 500 + maximum battery voltage */
ch_raw_write16(chgnum, BD9995X_CMD_VBATOVP_SET,
(bi->voltage_max + 500) & 0x7ff0,
BD9995X_EXTENDED_COMMAND);
/* Reverse buck boost voltage Setting */
ch_raw_write16(chgnum, BD9995X_CMD_VRBOOST_SET, 0,
BD9995X_EXTENDED_COMMAND);
/* Disable fast/pre-charging watchdog */
ch_raw_write16(chgnum, BD9995X_CMD_CHGWDT_SET, 0,
BD9995X_EXTENDED_COMMAND);
/* TODO(crosbug.com/p/55626): Set VSYSVAL_THH/THL appropriately */
}
/*
* Note: opting not to use charger driver init here due to the different
* priority (other drivers use HOOK_PRIO_INIT_I2C + 1)
*/
static void bd9995x_init(void)
{
int reg;
/*
* Disable charging trigger by BC1.2 on VCC & VBUS and
* automatic limitation of the input current.
*/
if (ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_CHGOP_SET1, &reg,
BD9995X_EXTENDED_COMMAND))
return;
reg |= (BD9995X_CMD_CHGOP_SET1_SDP_CHG_TRIG_EN |
BD9995X_CMD_CHGOP_SET1_SDP_CHG_TRIG |
BD9995X_CMD_CHGOP_SET1_VBUS_BC_DISEN |
BD9995X_CMD_CHGOP_SET1_VCC_BC_DISEN |
BD9995X_CMD_CHGOP_SET1_ILIM_AUTO_DISEN |
BD9995X_CMD_CHGOP_SET1_SDP_500_SEL |
BD9995X_CMD_CHGOP_SET1_DCP_2500_SEL);
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_CHGOP_SET1, reg,
BD9995X_EXTENDED_COMMAND);
/*
* OTP setting for this register is 6.08V. Set VSYS to above battery max
* (as is done when charger is disabled) to ensure VSYSREG_SET > VBAT so
* that the charger is in Pre-Charge state and that the input current
* disable setting below will be active.
*/
bd9995x_set_vsysreg(CHARGER_SOLO, battery_get_info()->voltage_max +
BD9995X_VSYS_PRECHARGE_OFFSET_MV);
/* Enable BC1.2 USB charging and DC/DC converter @ 1200KHz */
if (ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_CHGOP_SET2, &reg,
BD9995X_EXTENDED_COMMAND))
return;
reg &= ~(BD9995X_CMD_CHGOP_SET2_USB_SUS |
BD9995X_CMD_CHGOP_SET2_DCDC_CLK_SEL);
reg |= BD9995X_CMD_CHGOP_SET2_DCDC_CLK_SEL_1200;
#ifdef CONFIG_CHARGER_BD9995X_CHGEN
reg |= BD9995X_CMD_CHGOP_SET2_CHG_EN;
#endif
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_CHGOP_SET2, reg,
BD9995X_EXTENDED_COMMAND);
/*
* We disable IADP (here before setting IBUS_LIM_SET and ICC_LIM_SET)
* to prevent voltage on IADP/RESET pin from affecting SEL_ILIM_VAL.
*/
if (ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_VM_CTRL_SET, &reg,
BD9995X_EXTENDED_COMMAND))
return;
reg &= ~BD9995X_CMD_VM_CTRL_SET_EXTIADPEN;
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_VM_CTRL_SET, reg,
BD9995X_EXTENDED_COMMAND);
/*
* Disable the input current limit when VBAT is < VSYSREG_SET. This
* needs to be done before calling
* bd9995x_battery_charging_profile_settings() as in that function the
* input current limit is set to CONFIG_CHARGER_INPUT_CURRENT which is
* 512 mA. In deeply discharged battery cases, setting the input current
* limit this low can cause VSYS to collapse, which in turn can cause
* the EC's brownout detector to reset the EC.
*/
if (ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_VIN_CTRL_SET, &reg,
BD9995X_EXTENDED_COMMAND))
return;
reg |= BD9995X_CMD_VIN_CTRL_SET_VSYS_PRIORITY;
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_VIN_CTRL_SET, reg,
BD9995X_EXTENDED_COMMAND);
/* Mirror the state of this bit */
vsys_priority = 1;
/* Define battery charging profile */
bd9995x_battery_charging_profile_settings(CHARGER_SOLO);
/* Power save mode when VBUS/VCC is removed. */
#ifdef CONFIG_BD9995X_POWER_SAVE_MODE
bd9995x_set_power_save_mode(CONFIG_BD9995X_POWER_SAVE_MODE);
#else
bd9995x_set_power_save_mode(BD9995X_PWR_SAVE_OFF);
#endif
#ifdef CONFIG_USB_PD_DISCHARGE
/* Set VBUS / VCC detection threshold for discharge enable */
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_VBUS_TH_SET,
BD9995X_VBUS_DISCHARGE_TH, BD9995X_EXTENDED_COMMAND);
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_VCC_TH_SET,
BD9995X_VBUS_DISCHARGE_TH, BD9995X_EXTENDED_COMMAND);
#endif
/* Unlock debug regs */
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_PROTECT_SET, 0x3c,
BD9995X_EXTENDED_COMMAND);
/* Undocumented - reverse current threshold = -50mV */
ch_raw_write16(CHARGER_SOLO, 0x14, 0x0202, BD9995X_DEBUG_COMMAND);
/* Undocumented - internal gain = 2x */
ch_raw_write16(CHARGER_SOLO, 0x1a, 0x80, BD9995X_DEBUG_COMMAND);
/* Re-lock debug regs */
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_PROTECT_SET, 0x0,
BD9995X_EXTENDED_COMMAND);
}
DECLARE_HOOK(HOOK_INIT, bd9995x_init, HOOK_PRIO_INIT_EXTPOWER);
static enum ec_error_list bd9995x_post_init(int chgnum)
{
return EC_SUCCESS;
}
static enum ec_error_list bd9995x_discharge_on_ac(int chgnum, int enable)
{
int rv;
int reg;
rv = ch_raw_read16(chgnum, BD9995X_CMD_CHGOP_SET2, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/*
* Suspend USB charging and DC/DC converter so that BATT_LEARN mode
* doesn't auto exit if VBAT < VSYSVAL_THL_SET and also it helps to
* discharge VBUS quickly when charging is not allowed and the AC
* is removed.
*/
if (enable)
reg |= BD9995X_CMD_CHGOP_SET2_BATT_LEARN |
BD9995X_CMD_CHGOP_SET2_USB_SUS;
else
reg &= ~(BD9995X_CMD_CHGOP_SET2_BATT_LEARN |
BD9995X_CMD_CHGOP_SET2_USB_SUS);
return ch_raw_write16(chgnum, BD9995X_CMD_CHGOP_SET2, reg,
BD9995X_EXTENDED_COMMAND);
}
static enum ec_error_list bd9995x_get_vbus_voltage(int chgnum, int port,
int *voltage)
{
uint8_t read_reg;
read_reg = (port == BD9995X_CHARGE_PORT_VBUS) ? BD9995X_CMD_VBUS_VAL :
BD9995X_CMD_VCC_VAL;
return ch_raw_read16(chgnum, read_reg, voltage,
BD9995X_EXTENDED_COMMAND);
}
/*** Non-standard interface functions ***/
int bd9995x_is_vbus_provided(enum bd9995x_charge_port port)
{
int reg;
if (ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_VBUS_VCC_STATUS, &reg,
BD9995X_EXTENDED_COMMAND))
return 0;
if (port == BD9995X_CHARGE_PORT_VBUS)
reg &= BD9995X_CMD_VBUS_VCC_STATUS_VBUS_DETECT;
else if (port == BD9995X_CHARGE_PORT_VCC)
reg &= BD9995X_CMD_VBUS_VCC_STATUS_VCC_DETECT;
else if (port == BD9995X_CHARGE_PORT_BOTH) {
/* Check VBUS on either port */
reg &= (BD9995X_CMD_VBUS_VCC_STATUS_VCC_DETECT |
BD9995X_CMD_VBUS_VCC_STATUS_VBUS_DETECT);
} else
reg = 0;
return !!reg;
}
#ifdef CONFIG_BD9995X_DELAY_INPUT_PORT_SELECT
static int bd9995x_select_input_port_private(enum bd9995x_charge_port port,
int select)
#else
int bd9995x_select_input_port(enum bd9995x_charge_port port, int select)
#endif
{
int rv;
int reg;
mutex_lock(&bd9995x_vin_mutex);
rv = ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_VIN_CTRL_SET, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
goto select_input_port_exit;
if (select) {
if (port == BD9995X_CHARGE_PORT_VBUS) {
reg |= BD9995X_CMD_VIN_CTRL_SET_VBUS_EN;
reg &= ~BD9995X_CMD_VIN_CTRL_SET_VCC_EN;
} else if (port == BD9995X_CHARGE_PORT_VCC) {
reg |= BD9995X_CMD_VIN_CTRL_SET_VCC_EN;
reg &= ~BD9995X_CMD_VIN_CTRL_SET_VBUS_EN;
} else if (port == BD9995X_CHARGE_PORT_BOTH) {
/* Enable both the ports for PG3 */
reg |= BD9995X_CMD_VIN_CTRL_SET_VBUS_EN |
BD9995X_CMD_VIN_CTRL_SET_VCC_EN;
} else {
/* Invalid charge port */
panic("Invalid charge port");
}
} else {
if (port == BD9995X_CHARGE_PORT_VBUS)
reg &= ~BD9995X_CMD_VIN_CTRL_SET_VBUS_EN;
else if (port == BD9995X_CHARGE_PORT_VCC)
reg &= ~BD9995X_CMD_VIN_CTRL_SET_VCC_EN;
else if (port == BD9995X_CHARGE_PORT_BOTH)
reg &= ~(BD9995X_CMD_VIN_CTRL_SET_VBUS_EN |
BD9995X_CMD_VIN_CTRL_SET_VCC_EN);
else
panic("Invalid charge port");
}
rv = ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_VIN_CTRL_SET, reg,
BD9995X_EXTENDED_COMMAND);
select_input_port_exit:
mutex_unlock(&bd9995x_vin_mutex);
return rv;
}
#ifdef CONFIG_BD9995X_DELAY_INPUT_PORT_SELECT
int bd9995x_select_input_port(enum bd9995x_charge_port port, int select)
{
port_update = port;
select_update = select;
vbus_state = START;
select_input_port_update = 1;
task_wake(TASK_ID_USB_CHG);
return EC_SUCCESS;
}
static inline int bd9995x_vbus_test(int value, int limit)
{
uint32_t hi_value = limit + VBUS_DELTA;
uint32_t lo_value = limit - VBUS_DELTA;
return ((value > lo_value) && (value < hi_value));
}
static int bd9995x_vbus_debounce(int chgnum, enum bd9995x_charge_port port)
{
int vbus_reg;
int voltage;
vbus_reg = (port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_VBUS_VAL : BD9995X_CMD_VCC_VAL;
if (ch_raw_read16(chgnum, vbus_reg, &voltage, BD9995X_EXTENDED_COMMAND))
voltage = 0;
if (!bd9995x_vbus_test(voltage, vbus_voltage)) {
vbus_voltage = voltage;
debounce_time = get_time().val + VBUS_MSEC;
} else {
if (get_time().val >= debounce_time)
return 1;
}
return 0;
}
#endif
#ifdef CONFIG_CHARGER_BATTERY_TSENSE
int bd9995x_get_battery_temp(int *temp_ptr)
{
int rv;
rv = ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_THERM_VAL, temp_ptr,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/* Degrees C = 200 - THERM_VAL, range is -55C-200C, 1C steps */
*temp_ptr = 200 - *temp_ptr;
return EC_SUCCESS;
}
#endif
void bd9995x_set_power_save_mode(int mode)
{
ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_SMBREG, mode,
BD9995X_EXTENDED_COMMAND);
}
int bd9995x_get_battery_voltage(void)
{
int vbat_val, rv;
rv = ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_VBAT_VAL, &vbat_val,
BD9995X_EXTENDED_COMMAND);
return rv ? 0 : vbat_val;
}
#ifdef HAS_TASK_USB_CHG
int bd9995x_bc12_enable_charging(int port, int enable)
{
int rv;
int reg;
int mask_val;
/*
* For BC1.2, enable VBUS/VCC_BC_DISEN charging trigger by BC1.2
* detection and disable SDP_CHG_TRIG, SDP_CHG_TRIG_EN. Vice versa
* for USB-C.
*/
rv = ch_raw_read16(CHARGER_SOLO, BD9995X_CMD_CHGOP_SET1, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
mask_val = (BD9995X_CMD_CHGOP_SET1_SDP_CHG_TRIG_EN |
BD9995X_CMD_CHGOP_SET1_SDP_CHG_TRIG |
((port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_CHGOP_SET1_VBUS_BC_DISEN :
BD9995X_CMD_CHGOP_SET1_VCC_BC_DISEN));
if (enable)
reg &= ~mask_val;
else
reg |= mask_val;
return ch_raw_write16(CHARGER_SOLO, BD9995X_CMD_CHGOP_SET1, reg,
BD9995X_EXTENDED_COMMAND);
}
static void bd9995x_set_switches(int port, enum usb_switch setting)
{
/* If switch is not changing then return */
if (setting == usb_switch_state[port])
return;
if (setting != USB_SWITCH_RESTORE)
usb_switch_state[port] = setting;
/* ensure we disable power saving when we are using DP/DN */
#ifdef CONFIG_BD9995X_POWER_SAVE_MODE
bd9995x_set_power_save_mode(
(usb_switch_state[0] == USB_SWITCH_DISCONNECT &&
usb_switch_state[1] == USB_SWITCH_DISCONNECT)
? CONFIG_BD9995X_POWER_SAVE_MODE : BD9995X_PWR_SAVE_OFF);
#endif
bd9995x_update_ucd_set_reg(CHARGER_SOLO, port,
BD9995X_CMD_UCD_SET_USB_SW,
usb_switch_state[port] == USB_SWITCH_CONNECT);
}
void bd9995x_vbus_interrupt(enum gpio_signal signal)
{
task_wake(TASK_ID_USB_CHG);
}
static void bd9995x_usb_charger_task(const int unused)
{
static int initialized;
int changed, port, interrupts;
int sleep_usec;
uint64_t bc12_det_mark[CONFIG_USB_PD_PORT_MAX_COUNT];
#ifdef CONFIG_USB_PD_DISCHARGE
int vbus_reg, voltage;
#endif
#ifdef CONFIG_BD9995X_DELAY_INPUT_PORT_SELECT
select_input_port_update = 0;
vbus_voltage = 0;
#endif
for (port = 0; port < board_get_usb_pd_port_count(); port++) {
bc12_detected_type[port] = CHARGE_SUPPLIER_NONE;
bd9995x_enable_vbus_detect_interrupts(CHARGER_SOLO, port, 1);
bc12_det_mark[port] = 0;
}
while (1) {
sleep_usec = -1;
changed = 0;
for (port = 0; port < board_get_usb_pd_port_count(); port++) {
/* Get port interrupts */
interrupts = bd9995x_get_interrupts(CHARGER_SOLO, port);
if (interrupts & BD9995X_CMD_INT_VBUS_DET ||
!initialized) {
/*
* Detect based on current state of VBUS. If
* VBUS is provided, then need to wait for
* bc12_type to be available. If VBUS is not
* provided, then disable wait for this port.
*/
bc12_det_mark[port] =
usb_charger_process(CHARGER_SOLO, port)
? get_time().val + BC12_DETECT_US : 0;
changed = 1;
}
#ifdef CONFIG_USB_PD_DISCHARGE
if (interrupts & BD9995X_CMD_INT_VBUS_TH ||
!initialized) {
/* Get VBUS voltage */
vbus_reg = (port == BD9995X_CHARGE_PORT_VBUS) ?
BD9995X_CMD_VBUS_VAL :
BD9995X_CMD_VCC_VAL;
if (ch_raw_read16(CHARGER_SOLO, vbus_reg,
&voltage,
BD9995X_EXTENDED_COMMAND))
voltage = 0;
/* Set discharge accordingly */
pd_set_vbus_discharge(port,
voltage < BD9995X_VBUS_DISCHARGE_TH);
changed = 1;
}
#endif
if (bc12_det_mark[port] && (get_time().val >
bc12_det_mark[port])) {
/*
* bc12_type result should be available. If not
* available still, then function will return
* 1. Set up additional 100 msec wait. Note that
* if VBUS is no longer provided when this call
* happens the function will return 0.
*/
bc12_det_mark[port] =
bd9995x_bc12_check_type(CHARGER_SOLO,
port) ?
get_time().val + 100 * MSEC : 0;
/* Reset BC1.2 regs to skip auto-detection. */
bd9995x_bc12_detect(CHARGER_SOLO, port, 0);
}
/*
* Determine if a wait for reading bc12_type needs to be
* scheduled. Use the scheduled wait for this port if
* it's less than the wait needed for a previous
* port. If previous port(s) don't need a wait, then
* sleep_usec will be -1.
*/
if (bc12_det_mark[port]) {
int bc12_wait_usec;
bc12_wait_usec = bc12_det_mark[port]
- get_time().val;
if ((sleep_usec < 0) ||
(sleep_usec > bc12_wait_usec))
sleep_usec = bc12_wait_usec;
}
}
initialized = 1;
#ifdef CONFIG_BD9995X_DELAY_INPUT_PORT_SELECT
/*
* When a charge port is selected and VBUS is 5V, the inrush current on some
* devices causes VBUS to droop, which could signal a sink disconnection.
*
* To mitigate the problem, charge port selection is delayed until VBUS
* is stable or one second has passed. Hopefully PD has negotiated a VBUS
* voltage of at least 9V before the one second timeout.
*/
if (select_input_port_update) {
sleep_usec = VBUS_CHECK_MSEC;
changed = 0;
switch (vbus_state) {
case START:
vbus_timeout = get_time().val + STABLE_TIMEOUT;
vbus_state = STABLE;
break;
case STABLE:
if (get_time().val > vbus_timeout) {
vbus_state = DEBOUNCE;
vbus_timeout = get_time().val +
DEBOUNCE_TIMEOUT;
}
break;
case DEBOUNCE:
if (bd9995x_vbus_debounce(CHARGER_SOLO, port_update) ||
get_time().val > vbus_timeout) {
select_input_port_update = 0;
bd9995x_select_input_port_private(
port_update, select_update);
}
break;
}
}
#endif
/*
* Re-read interrupt registers immediately if we got an
* interrupt. We're dealing with multiple independent
* interrupt sources and the interrupt pin may have
* never deasserted if both sources were not in clear
* state simultaneously.
*/
if (!changed)
task_wait_event(sleep_usec);
}
}
#endif /* HAS_TASK_USB_CHG */
/*** Console commands ***/
#ifdef CONFIG_CMD_CHARGER_DUMP
static int read_bat(int chgnum, uint8_t cmd)
{
int read = 0;
ch_raw_read16(chgnum, cmd, &read, BD9995X_BAT_CHG_COMMAND);
return read;
}
static int read_ext(int chgnum, uint8_t cmd)
{
int read = 0;
ch_raw_read16(chgnum, cmd, &read, BD9995X_EXTENDED_COMMAND);
return read;
}
/* Dump all readable registers on bd9995x */
static int console_bd9995x_dump_regs(int argc, char **argv)
{
int i;
uint8_t regs[] = { 0x14, 0x15, 0x3c, 0x3d, 0x3e, 0x3f };
/* Battery group registers */
for (i = 0; i < ARRAY_SIZE(regs); ++i)
ccprintf("BAT REG %4x: %4x\n", regs[i], read_bat(CHARGER_SOLO,
regs[i]));
/* Extended group registers */
for (i = 0; i < 0x7f; ++i) {
ccprintf("EXT REG %4x: %4x\n", i, read_ext(CHARGER_SOLO, i));
cflush();
}
return 0;
}
DECLARE_CONSOLE_COMMAND(charger_dump, console_bd9995x_dump_regs,
NULL,
"Dump all charger registers");
#endif /* CONFIG_CMD_CHARGER_DUMP */
#ifdef CONFIG_CMD_CHARGER
static int console_command_bd9995x(int argc, char **argv)
{
int rv, reg, data, val;
char rw, *e;
enum bd9995x_command cmd;
if (argc < 4)
return EC_ERROR_PARAM_COUNT;
rw = argv[1][0];
if (rw == 'w' && argc < 5)
return EC_ERROR_PARAM_COUNT;
else if (rw != 'w' && rw != 'r')
return EC_ERROR_PARAM1;
reg = strtoi(argv[2], &e, 16);
if (*e || reg < 0)
return EC_ERROR_PARAM2;
cmd = strtoi(argv[3], &e, 0);
if (*e || cmd < 0)
return EC_ERROR_PARAM3;
if (rw == 'r')
rv = ch_raw_read16(CHARGER_SOLO, reg, &data, cmd);
else {
val = strtoi(argv[4], &e, 16);
if (*e || val < 0)
return EC_ERROR_PARAM4;
rv = ch_raw_write16(CHARGER_SOLO, reg, val, cmd);
if (rv == EC_SUCCESS)
rv = ch_raw_read16(CHARGER_SOLO, reg, &data, cmd);
}
if (rv == EC_SUCCESS)
CPRINTS("register 0x%x [%d] = 0x%x [%d]", reg, reg, data, data);
return rv;
}
DECLARE_CONSOLE_COMMAND(bd9995x, console_command_bd9995x,
"bd9995x <r/w> <reg_hex> <cmd_type> | <val_hex>",
"Read or write a charger register");
#endif /* CONFIG_CMD_CHARGER */
#ifdef CONFIG_CHARGER_PSYS_READ
static int bd9995x_psys_charger_adc(int chgnum)
{
int i;
int reg;
uint64_t ipmon = 0;
for (i = 0; i < BD9995X_PMON_IOUT_ADC_READ_COUNT; i++) {
if (ch_raw_read16(chgnum, BD9995X_CMD_PMON_DACIN_VAL, &reg,
BD9995X_EXTENDED_COMMAND))
return 0;
/* Conversion Interval is 200us */
usleep(200);
ipmon += reg;
}
/*
* Calculate power in mW
* PSYS = VACP×IACP+VBAT×IBAT = IPMON / GPMON
*/
return (int) ((ipmon * 1000) / (BIT(BD9995X_PSYS_GAIN_SELECT) *
BD9995X_PMON_IOUT_ADC_READ_COUNT));
}
static int bd9995x_enable_psys(int chgnum)
{
int rv;
int reg;
rv = ch_raw_read16(chgnum, BD9995X_CMD_PMON_IOUT_CTRL_SET, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/* Enable PSYS & Select PSYS Gain */
reg &= ~BD9995X_CMD_PMON_IOUT_CTRL_SET_PMON_GAIN_SET_MASK;
reg |= (BD9995X_CMD_PMON_IOUT_CTRL_SET_PMON_INSEL |
BD9995X_CMD_PMON_IOUT_CTRL_SET_PMON_OUT_EN |
BD9995X_PSYS_GAIN_SELECT);
return ch_raw_write16(chgnum, BD9995X_CMD_PMON_IOUT_CTRL_SET, reg,
BD9995X_EXTENDED_COMMAND);
}
/**
* Get system power.
*
* TODO(b:71520677): Implement charger_get_system_power, disable psys readout
* when not needed (the code below leaves it enabled after the first access),
* update "psys" console command to use charger_get_system_power and move it
* to some common code.
*/
static int console_command_psys(int argc, char **argv)
{
int rv;
rv = bd9995x_enable_psys(CHARGER_SOLO);
if (rv)
return rv;
CPRINTS("PSYS from chg_adc: %d mW",
bd9995x_psys_charger_adc(CHARGER_SOLO));
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(psys, console_command_psys,
NULL,
"Get the system power in mW");
#endif /* CONFIG_CHARGER_PSYS_READ */
#ifdef CONFIG_CMD_CHARGER_ADC_AMON_BMON
static int bd9995x_amon_bmon_chg_adc(int chgnum)
{
int i;
int reg;
int iout = 0;
for (i = 0; i < BD9995X_PMON_IOUT_ADC_READ_COUNT; i++) {
ch_raw_read16(chgnum, BD9995X_CMD_IOUT_DACIN_VAL, &reg,
BD9995X_EXTENDED_COMMAND);
iout += reg;
/* Conversion Interval is 200us */
usleep(200);
}
/*
* Discharge current in mA
* IDCHG = iout * GIDCHG
* IADP = iout * GIADP
*
* VIDCHG = GIDCHG * (VSRN- VSRP) = GIDCHG * IDCHG / IDCHG_RES
* VIADP = GIADP * (VACP- VACN) = GIADP * IADP / IADP_RES
*/
return (iout * (5 << BD9995X_IOUT_GAIN_SELECT)) /
(10 * BD9995X_PMON_IOUT_ADC_READ_COUNT);
}
static int bd9995x_amon_bmon(int chgnum, int amon_bmon)
{
int rv;
int reg;
int imon;
int sns_res;
rv = ch_raw_read16(chgnum, BD9995X_CMD_PMON_IOUT_CTRL_SET, &reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
/* Enable monitor */
reg &= ~BD9995X_CMD_PMON_IOUT_CTRL_SET_IOUT_GAIN_SET_MASK;
reg |= (BD9995X_CMD_PMON_IOUT_CTRL_SET_IMON_INSEL |
BD9995X_CMD_PMON_IOUT_CTRL_SET_IOUT_OUT_EN |
(BD9995X_IOUT_GAIN_SELECT << 4));
if (amon_bmon) {
reg |= BD9995X_CMD_PMON_IOUT_CTRL_SET_IOUT_SOURCE_SEL;
sns_res = CONFIG_CHARGER_SENSE_RESISTOR_AC;
} else {
reg &= ~BD9995X_CMD_PMON_IOUT_CTRL_SET_IOUT_SOURCE_SEL;
sns_res = CONFIG_CHARGER_SENSE_RESISTOR;
}
rv = ch_raw_write16(chgnum, BD9995X_CMD_PMON_IOUT_CTRL_SET, reg,
BD9995X_EXTENDED_COMMAND);
if (rv)
return rv;
imon = bd9995x_amon_bmon_chg_adc(chgnum);
CPRINTS("%cMON from chg_adc: %d uV, %d mA]",
amon_bmon ? 'A' : 'B',
imon * sns_res,
imon);
return EC_SUCCESS;
}
/**
* Get charger AMON and BMON current.
*/
static int console_command_amon_bmon(int argc, char **argv)
{
int rv = EC_ERROR_PARAM1;
/* Switch to AMON */
if (argc == 1 || (argc >= 2 && argv[1][0] == 'a'))
rv = bd9995x_amon_bmon(CHARGER_SOLO, 1);
/* Switch to BMON */
if (argc == 1 || (argc >= 2 && argv[1][0] == 'b'))
rv = bd9995x_amon_bmon(CHARGER_SOLO, 0);
return rv;
}
DECLARE_CONSOLE_COMMAND(amonbmon, console_command_amon_bmon,
"amonbmon [a|b]",
"Get charger AMON/BMON voltage diff, current");
#endif /* CONFIG_CMD_CHARGER_ADC_AMON_BMON */
#ifdef CONFIG_CMD_I2C_STRESS_TEST_CHARGER
static int bd9995x_i2c_read(const int reg, int *data)
{
return ch_raw_read16(CHARGER_SOLO, reg, data, BD9995X_EXTENDED_COMMAND);
}
static int bd9995x_i2c_write(const int reg, int data)
{
return ch_raw_write16(CHARGER_SOLO, reg, data,
BD9995X_EXTENDED_COMMAND);
}
/* BD9995X_CMD_CHIP_ID register value may vary by chip. */
struct i2c_stress_test_dev bd9995x_i2c_stress_test_dev = {
.reg_info = {
.read_reg = BD9995X_CMD_CHIP_ID,
.read_val = BD99956_CHIP_ID,
.write_reg = BD9995X_CMD_ITRICH_SET,
},
.i2c_read_dev = &bd9995x_i2c_read,
.i2c_write_dev = &bd9995x_i2c_write,
};
#endif /* CONFIG_CMD_I2C_STRESS_TEST_CHARGER */
const struct charger_drv bd9995x_drv = {
.post_init = &bd9995x_post_init,
.get_info = &bd9995x_get_info,
.get_status = &bd9995x_get_status,
.set_mode = &bd9995x_set_mode,
.get_current = &bd9995x_get_current,
.set_current = &bd9995x_set_current,
.get_voltage = &bd9995x_get_voltage,
.set_voltage = &bd9995x_set_voltage,
.discharge_on_ac = &bd9995x_discharge_on_ac,
.get_vbus_voltage = &bd9995x_get_vbus_voltage,
.set_input_current = &bd9995x_set_input_current,
.get_input_current = &bd9995x_get_input_current,
.manufacturer_id = &bd9995x_manufacturer_id,
.device_id = &bd9995x_device_id,
.get_option = &bd9995x_get_option,
.set_option = &bd9995x_set_option,
};
#ifdef CONFIG_BC12_SINGLE_DRIVER
/* provide a default bc12_ports[] for backward compatibility */
struct bc12_config bc12_ports[BD9995X_CHARGE_PORT_COUNT] = {
{
.drv = &(const struct bc12_drv) {
.usb_charger_task = bd9995x_usb_charger_task,
.set_switches = bd9995x_set_switches,
#if defined(CONFIG_CHARGE_RAMP_SW)
.ramp_allowed = bd9995x_ramp_allowed,
.ramp_max = bd9995x_ramp_max,
#endif /* CONFIG_CHARGE_RAMP_SW */
},
},
{
.drv = &(const struct bc12_drv) {
/* bd9995x uses a single task thread for both ports */
.usb_charger_task = NULL,
.set_switches = bd9995x_set_switches,
#if defined(CONFIG_CHARGE_RAMP_SW)
.ramp_allowed = bd9995x_ramp_allowed,
.ramp_max = bd9995x_ramp_max,
#endif /* CONFIG_CHARGE_RAMP_SW */
},
},
};
BUILD_ASSERT(ARRAY_SIZE(bc12_ports) == CHARGE_PORT_COUNT);
#else
/*
* TODO:
* This driver assumes its two ports is always on number 0 and 1.
* Prohibit multiple driver for safety.
*/
#error config not supported
#endif /* CONFIG_BC12_SINGLE_DRIVER */