/*
 * Copyright 2009-2015, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Clemens Zeidler, haiku@clemens-zeidler.de
 */


#include "APMDriverInterface.h"

#include <arch/x86/apm_defs.h>
#include <generic_syscall_defs.h>
#include <syscalls.h>


const bigtime_t kUpdateInterval = 2000000;
                // every two seconds


APMDriverInterface::~APMDriverInterface()
{
}


status_t
APMDriverInterface::Connect()
{
        uint32 version = 0;
        status_t status = _kern_generic_syscall(APM_SYSCALLS, B_SYSCALL_INFO,
                &version, sizeof(version));
        if (status == B_OK) {
                apm_battery_info info;
                status = _kern_generic_syscall(APM_SYSCALLS, APM_GET_BATTERY_INFO,
                        &info, sizeof(apm_battery_info));
        }

        return status;
}


status_t
APMDriverInterface::GetBatteryInfo(int32 index, battery_info* info)
{
        if (index != 0)
                return B_BAD_VALUE;

        info->current_rate = -1;

        apm_battery_info apmInfo;
        status_t status = _kern_generic_syscall(APM_SYSCALLS, APM_GET_BATTERY_INFO,
                &apmInfo, sizeof(apm_battery_info));
        if (status == B_OK) {
                info->state = apmInfo.online ? BATTERY_CHARGING : BATTERY_DISCHARGING;
                info->capacity = apmInfo.percent;
                info->full_capacity = 100;
                info->time_left = apmInfo.time_left;
        }

        return status;
}


status_t
APMDriverInterface::GetExtendedBatteryInfo(int32 index,
        acpi_extended_battery_info* info)
{
        return B_NOT_SUPPORTED;
}


int32
APMDriverInterface::GetBatteryCount()
{
        return 1;
}


void
APMDriverInterface::_WatchPowerStatus()
{
        while (atomic_get(&fIsWatching) > 0) {
                Broadcast(kMsgUpdate);
                acquire_sem_etc(fWaitSem, 1, B_RELATIVE_TIMEOUT, kUpdateInterval);
        }
}