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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Battery pack vendor provided charging profile
*/
#include "battery.h"
#include "battery_fuel_gauge.h"
#include "cbi.h"
#include "charge_ramp.h"
#include "charge_state.h"
#include "charger_profile_override.h"
#include "common.h"
#include "compile_time_macros.h"
#include "gpio.h"
/*
* Battery info for all Osiris battery types. Note that the fields
* start_charging_min/max and charging_min/max are not used for the charger.
* The effective temperature limits are given by discharging_min/max_c.
*
* Fuel Gauge (FG) parameters which are used for determining if the battery
* is connected, the appropriate ship mode (battery cutoff) command, and the
* charge/discharge FETs status.
*
* Ship mode (battery cutoff) requires 2 writes to the appropriate smart battery
* register. For some batteries, the charge/discharge FET bits are set when
* charging/discharging is active, in other types, these bits set mean that
* charging/discharging is disabled. Therefore, in addition to the mask for
* these bits, a disconnect value must be specified. Note that for TI fuel
* gauge, the charge/discharge FET status is found in Operation Status (0x54),
* but a read of Manufacturer Access (0x00) will return the lower 16 bits of
* Operation status which contains the FET status bits.
*
* The assumption for battery types supported is that the charge/discharge FET
* status can be read with a sb_read() command and therefore, only the register
* address, mask, and disconnect value need to be provided.
*/
const struct board_batt_params board_battery_info[] = {
/* COSMX AP22ABN Battery Information */
[BATTERY_COSMX_AP22ABN] = {
.fuel_gauge = {
.manuf_name = "COSMX KT0030B003",
.device_name = "AP22ABN",
.ship_mode = {
.reg_addr = 0x3A,
.reg_data = { 0xC574, 0xC574 },
},
.fet = {
.mfgacc_support = 1,
.reg_addr = 0x0,
.reg_mask = 0x8000,
.disconnect_val = 0x8000,
.cfet_mask = 0x4000,
.cfet_off_val = 0x4000,
},
},
.batt_info = {
.voltage_max = 13440,
.voltage_normal = 11670,
.voltage_min = 9000,
.precharge_current = 567,
.start_charging_min_c = 0,
.start_charging_max_c = 50,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 75,
},
},
};
BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_COSMX_AP22ABN;
enum battery_present battery_hw_present(void)
{
/* The GPIO is low when the battery is physically present */
return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
}
static int charger_should_discharge_on_ac(struct charge_state_data *curr)
{
/* can not discharge on AC without battery */
if (curr->batt.is_present != BP_YES)
return 0;
/* Do not discharge when battery disconnect */
if (battery_get_disconnect_state() != BATTERY_NOT_DISCONNECTED)
return 0;
/* Do not discharge on AC if the battery is still waking up */
if ((curr->batt.flags & BATT_FLAG_BAD_STATUS) ||
(!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) &&
!(curr->batt.status & STATUS_FULLY_CHARGED)))
return 0;
/*
* In heavy load (>3A being withdrawn from VSYS) the DCDC of the
* charger operates on hybrid mode. This causes a slight voltage
* ripple on VSYS that falls in the audible noise frequency (single
* digit kHz range). This small ripple generates audible noise in
* the output ceramic capacitors (caps on VSYS and any input of
* DCDC under VSYS).
*
* To overcome this issue, force battery discharging when battery
* full, So the battery MOS of NVDC charger will turn on always,
* it make the Vsys same as Vbat and the noise has been improved.
*/
if (!battery_is_cut_off() &&
!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) &&
(curr->batt.status & STATUS_FULLY_CHARGED))
return 1;
return 0;
}
/*
* This can override the smart battery's charging profile. To make a change,
* modify one or more of requested_voltage, requested_current, or state.
* Leave everything else unchanged.
*
* Return the next poll period in usec, or zero to use the default (which is
* state dependent).
*/
int charger_profile_override(struct charge_state_data *curr)
{
int disch_on_ac = charger_should_discharge_on_ac(curr);
charger_discharge_on_ac(disch_on_ac);
if (disch_on_ac) {
curr->state = ST_DISCHARGE;
return 0;
}
return 0;
}
enum ec_status charger_profile_override_get_param(uint32_t param,
uint32_t *value)
{
return EC_RES_INVALID_PARAM;
}
enum ec_status charger_profile_override_set_param(uint32_t param,
uint32_t value)
{
return EC_RES_INVALID_PARAM;
}
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