blob: de669eb3203baa19c20b4a5bbc4ed9c51a99745c [file] [log] [blame]
/*
// Copyright (c) 2018 Intel 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 <experimental/filesystem>
#include <fcntl.h>
#include <fstream>
#include <phosphor-logging/elog-errors.hpp>
#include <unistd.h>
#include <xyz/openbmc_project/Common/error.hpp>
#include "gpio.hpp"
const static constexpr char *SYSMGR_SERVICE = "org.openbmc.managers.System";
const static constexpr char *SYSMGR_OBJ_PATH = "/org/openbmc/managers/System";
const static constexpr char *SYSMGR_INTERFACE = "org.openbmc.managers.System";
int closeGpio(int fd)
{
if (fd > 0)
{
::close(fd);
}
return 0;
}
int configGpio(const char *gpioName, int *fd, sdbusplus::bus::bus &bus)
{
sdbusplus::message::message method = bus.new_method_call(
SYSMGR_SERVICE, SYSMGR_OBJ_PATH, SYSMGR_INTERFACE, "gpioInit");
method.append(gpioName);
sdbusplus::message::message result = bus.call(method);
if (result.is_method_error())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"configGPIO: bus call error!");
return -1;
}
int32_t gpioNum = -1;
std::string gpioDev;
std::string gpioDirection;
result.read(gpioDev, gpioNum, gpioDirection);
if (gpioDev.empty())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"configGPIO: gpioDev error!");
return -1;
}
if (gpioDirection.empty())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"configGPIO: gpioDirection error!");
return -1;
}
std::fstream stream;
stream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
std::string devPath =
gpioDev + "/gpio" + std::to_string(gpioNum) + "/value";
std::experimental::filesystem::path fullPath(devPath);
if (std::experimental::filesystem::exists(fullPath))
{
phosphor::logging::log<phosphor::logging::level::INFO>(
"GPIO exported",
phosphor::logging::entry("PATH=%s", devPath.c_str()));
}
else
{
devPath = gpioDev + "/export";
stream.open(devPath, std::fstream::out);
if (!stream.good())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"Error in opening for write!",
phosphor::logging::entry("PATH=%s", devPath.c_str()),
phosphor::logging::entry("NUM=%d", gpioNum));
return -1;
}
stream << gpioNum;
stream.close();
}
if (gpioDirection == "out")
{
devPath = gpioDev + "/gpio" + std::to_string(gpioNum) + "/value";
uint32_t currentValue = 0;
stream.open(devPath, std::fstream::in);
if (!stream.good())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"Error in opening for read!",
phosphor::logging::entry("PATH=%s", devPath.c_str()));
return -1;
}
stream >> currentValue;
stream.close();
const char *direction = currentValue ? "high" : "low";
devPath = gpioDev + "/gpio" + std::to_string(gpioNum) + "/direction";
stream.open(devPath, std::fstream::out);
if (!stream.good())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"Error in opening for write!");
return -1;
}
stream << direction;
stream.close();
}
else if (gpioDirection == "in")
{
devPath = gpioDev + "/gpio" + std::to_string(gpioNum) + "/direction";
stream.open(devPath, std::fstream::out);
if (!stream.good())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"Error in opening for write!");
return -1;
}
stream << gpioDirection;
stream.close();
}
else if (gpioDirection == "both")
{
// For gpio configured as ‘both’, it is an interrupt pin and trigged on
// both rising and falling signals
devPath = gpioDev + "/gpio" + std::to_string(gpioNum) + "/edge";
stream.open(devPath, std::fstream::out);
if (!stream.good())
{
phosphor::logging::log<phosphor::logging::level::ERR>(
"Error in opening for write!");
return -1;
}
stream << gpioDirection;
stream.close();
}
devPath = gpioDev + "/gpio" + std::to_string(gpioNum) + "/value";
*fd = ::open(devPath.c_str(), O_RDWR | O_NONBLOCK);
if (*fd < 0)
{
phosphor::logging::log<phosphor::logging::level::ERR>("open error!");
return -1;
}
return 0;
}