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/* Copyright (c) 2015 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_smart.h"
#include "console.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "system.h"
#include "util.h"
/* FET ON/OFF cammand write to fet off register */
#define SB_FET_OFF 0x34
#define SB_FETOFF_DATA1 0x0000
#define SB_FETOFF_DATA2 0x1000
#define SB_FETON_DATA1 0x2000
#define SB_FETON_DATA2 0x4000
#define BATTERY_FETOFF 0x0100
/*
* Green book support parameter
* Enable this will make battery meet JEITA standard
*/
#define GREEN_BOOK_SUPPORT (1 << 2)
static const struct battery_info info = {
.voltage_max = 8600, /* mV */
.voltage_normal = 7600,
.voltage_min = 6000,
.precharge_current = 230, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 60,
.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;
}
static void wakeup_deferred(void)
{
int d;
int mode;
/* Add Green Book support */
sb_read(SB_BATTERY_MODE, &mode);
mode |= GREEN_BOOK_SUPPORT;
sb_write(SB_BATTERY_MODE, mode);
sb_read(SB_FET_OFF, &d);
if (extpower_is_present() && (BATTERY_FETOFF == d)) {
sb_write(SB_FET_OFF, SB_FETON_DATA1);
sb_write(SB_FET_OFF, SB_FETON_DATA2);
}
}
DECLARE_DEFERRED(wakeup_deferred);
static void wakeup(void)
{
/*
* The deferred call ensures that wakeup_deferred is called from a
* task. This is required to talk to the battery over I2C.
*/
hook_call_deferred(wakeup_deferred, 0);
}
DECLARE_HOOK(HOOK_INIT, wakeup, HOOK_PRIO_DEFAULT);
static int cutoff(void)
{
int rv;
/* Ship mode command must be sent twice to take effect */
rv = sb_write(SB_FET_OFF, SB_FETOFF_DATA1);
if (rv != EC_SUCCESS)
return rv;
return sb_write(SB_FET_OFF, SB_FETOFF_DATA2);
}
int board_cut_off_battery(void)
{
return cutoff();
}
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