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/* Copyright (c) 2013 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_pack.h"
#include "gpio.h"
#include "host_command.h"
#include "smart_battery.h"
#define SB_SHIP_MODE_ADDR 0x3a
#define SB_SHIP_MODE_DATA 0xc574
/* Values for 54Wh 3UPF656790-1-T1001 battery */
static const struct battery_info info = {
.voltage_max = 12600,
.voltage_normal = 11100, /* Average of max & min */
.voltage_min = 9000,
/*
* Operational temperature range
* 0 <= T_charge <= 60 deg C
* 0 <= T_discharge <= 50 deg C
*/
.temp_charge_min = CELSIUS_TO_DECI_KELVIN(0),
.temp_charge_max = CELSIUS_TO_DECI_KELVIN(60),
.temp_discharge_min = CELSIUS_TO_DECI_KELVIN(0),
.temp_discharge_max = CELSIUS_TO_DECI_KELVIN(50),
/* Pre-charge values. */
.precharge_current = 256, /* mA */
};
const struct battery_info *battery_get_info(void)
{
return &info;
}
/* FIXME: The smart battery should do the right thing - that's why it's
* called "smart". Do we really want to second-guess it? For now, let's not. */
void battery_vendor_params(struct batt_params *batt)
{
#if 0
/* Limit charging voltage */
if (batt->desired_voltage > info.voltage_max)
batt->desired_voltage = info.voltage_max;
/* Don't charge if outside of allowable temperature range */
if (batt->temperature >= info.temp_charge_max ||
batt->temperature <= info.temp_charge_min) {
batt->desired_voltage = 0;
batt->desired_current = 0;
}
#endif
}
int battery_command_cut_off(struct host_cmd_handler_args *args)
{
return sb_write(SB_SHIP_MODE_ADDR, SB_SHIP_MODE_DATA);
}
DECLARE_HOST_COMMAND(EC_CMD_BATTERY_CUT_OFF, battery_command_cut_off,
EC_VER_MASK(0));
/**
* Physical detection of battery connection.
*/
int battery_is_connected(void)
{
return (gpio_get_level(GPIO_BAT_DETECT_L) == 0);
}
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