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/* Copyright 2021 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.
*
* Battery pack vendor provided charging profile
*/
#include "battery_fuel_gauge.h"
#include "charge_state.h"
#include "common.h"
#include "hooks.h"
#include "usb_pd.h"
#include "util.h"
/*
* Battery info for all bugzzy 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.
*
* Battery FET Status in Manufacture Access : bit15 & bit14
* b'00 - dfet : on / cfet : on
* b'01 - dfet : on / cfet : off
* b'10 - dfet : off / cfet : off
* b'11 - dfet : off / cfet : on
* The value b'10 is disconnect_val, so we can use b'01 for cfet_off_val
*/
const struct board_batt_params board_battery_info[] = {
/* SDI Battery Information */
[BATTERY_SDI] = {
.fuel_gauge = {
.manuf_name = "SDI",
.device_name = "4404D57",
.ship_mode = {
.reg_addr = 0x00,
.reg_data = { 0x0010, 0x0010 },
},
.fet = {
.mfgacc_support = 0,
.reg_addr = 0x00,
.reg_mask = 0xc000,
.disconnect_val = 0x8000,
.cfet_mask = 0xc000,
.cfet_off_val = 0x4000,
}
},
.batt_info = {
.voltage_max = 8700,
.voltage_normal = 7700, /* mV */
.voltage_min = 6000, /* mV */
.precharge_current = 200, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 55,
.discharging_min_c = -20,
.discharging_max_c = 70,
},
},
};
BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_SDI;
/* Lower our input voltage to 5V in S0iX when battery is full. */
#define PD_VOLTAGE_WHEN_FULL 5000
static void reduce_input_voltage_when_full(void)
{
static int saved_input_voltage = -1;
int max_pd_voltage_mv = pd_get_max_voltage();
int port;
if (charge_get_percent() == 100 &&
chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
if (max_pd_voltage_mv != PD_VOLTAGE_WHEN_FULL) {
saved_input_voltage = max_pd_voltage_mv;
max_pd_voltage_mv = PD_VOLTAGE_WHEN_FULL;
}
} else if (saved_input_voltage != -1) {
if (max_pd_voltage_mv == PD_VOLTAGE_WHEN_FULL)
max_pd_voltage_mv = saved_input_voltage;
saved_input_voltage = -1;
}
if (pd_get_max_voltage() != max_pd_voltage_mv) {
for (port = 0; port < CONFIG_USB_PD_PORT_MAX_COUNT; port++)
pd_set_external_voltage_limit(port, max_pd_voltage_mv);
}
}
DECLARE_HOOK(HOOK_SECOND, reduce_input_voltage_when_full,
HOOK_PRIO_DEFAULT);
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