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/* Copyright 2019 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.h"
#include "battery_fuel_gauge.h"
#include "battery_smart.h"
#include "gpio.h"
#include "system.h"
static enum battery_present batt_pres_prev = BP_NOT_SURE;
/* Shutdown mode parameter to write to manufacturer access register */
#define SB_SHIP_MODE_REG SB_MANUFACTURER_ACCESS
#define SB_SHUTDOWN_DATA 0x0010
static const struct battery_info info = {
.voltage_max = 13200,
.voltage_normal = 11580,
.voltage_min = 9000,
.precharge_current = 256,
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 60,
};
const struct battery_info *battery_get_info(void)
{
return &info;
}
enum battery_disconnect_state battery_get_disconnect_state(void)
{
if (battery_is_present() == BP_YES)
return BATTERY_NOT_DISCONNECTED;
return BATTERY_DISCONNECTED;
}
enum battery_present battery_hw_present(void)
{
return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
}
static int battery_init(void)
{
int batt_status;
return battery_status(&batt_status) ? 0 :
!!(batt_status & STATUS_INITIALIZED);
}
/*
* Physical detection of battery.
*/
static enum battery_present battery_check_present_status(void)
{
enum battery_present batt_pres;
/* Get the physical hardware status */
batt_pres = battery_hw_present();
/*
* If the battery is not physically connected, then no need to perform
* any more checks.
*/
if (batt_pres != BP_YES)
return batt_pres;
/*
* If the battery is present now and was present last time we checked,
* return early.
*/
if (batt_pres == batt_pres_prev)
return batt_pres;
/*
* Ensure that battery is:
* 1. Not in cutoff
* 2. Initialized
*/
if (battery_is_cut_off() != BATTERY_CUTOFF_STATE_NORMAL ||
battery_init() == 0) {
batt_pres = BP_NO;
}
return batt_pres;
}
enum battery_present battery_is_present(void)
{
batt_pres_prev = battery_check_present_status();
return batt_pres_prev;
}
int board_cut_off_battery(void)
{
int rv;
/* Ship mode command must be sent twice to take effect */
rv = sb_write(SB_SHIP_MODE_REG, SB_SHUTDOWN_DATA);
if (rv != EC_SUCCESS)
return rv;
return sb_write(SB_SHIP_MODE_REG, SB_SHUTDOWN_DATA);
}
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