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/**
* Copyright © 2017 IBM Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <memory>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/elog.hpp>
#include <tuple>
#include <xyz/openbmc_project/Common/Callout/error.hpp>
#include "gpio.hpp"
#include "rpolicy.hpp"
#include "sdevent.hpp"
namespace phosphor
{
namespace fan
{
namespace presence
{
Gpio::Gpio(
const std::string& physDevice,
unsigned int physPin) :
currentState(false),
evdevfd(open("/dev/input/by-path/platform-gpio-keys-event",
O_RDONLY | O_NONBLOCK)),
evdev(evdevpp::evdev::newFromFD(evdevfd())),
phys(physDevice),
pin(physPin),
callback(nullptr)
{
}
bool Gpio::start()
{
callback = std::make_unique<sdevent::event::io::IO>(
util::SDEvent::getEvent(),
evdevfd(),
[this](auto& s){this->ioCallback(s);});
currentState = present();
return currentState;
}
void Gpio::stop()
{
callback = nullptr;
}
bool Gpio::present()
{
return evdev.fetch(EV_KEY, pin) != 0;
}
void Gpio::fail()
{
using namespace sdbusplus::xyz::openbmc_project::Common::Callout::Error;
using namespace phosphor::logging;
using namespace xyz::openbmc_project::Common::Callout;
report<sdbusplus::xyz::openbmc_project::Common::Callout::Error::GPIO>(
GPIO::CALLOUT_GPIO_NUM(pin),
GPIO::CALLOUT_ERRNO(0),
GPIO::CALLOUT_DEVICE_PATH(phys.c_str()));
}
void Gpio::ioCallback(sdevent::source::Source& source)
{
unsigned int type, code, value;
std::tie(type, code, value) = evdev.next();
if (type != EV_KEY || code != pin)
{
return;
}
bool newState = value != 0;
if (currentState != newState)
{
getPolicy().stateChanged(newState);
currentState = newState;
}
}
} // namespace presence
} // namespace fan
} // namespace phosphor
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