Implement phosphor-buttons based C++ and sdbusplus interfaces.
This phosphor-buttons module handles all the physical buttons
like Reset/Power/ID button pressed/released signals and the
simulate signals on button pressed/released in WebUI.
All the signals are exposed into dbus and let other
modules be aware.
Change-Id: I52144718ef54d403c5221e5afd0216b9494f8523
Signed-off-by: Kuiying Wang <kuiying.wang@intel.com>
diff --git a/inc/id_button.hpp b/inc/id_button.hpp
new file mode 100644
index 0000000..cc664b2
--- /dev/null
+++ b/inc/id_button.hpp
@@ -0,0 +1,139 @@
+/*
+// 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.
+*/
+
+#pragma once
+#include <phosphor-logging/elog-errors.hpp>
+#include <unistd.h>
+#include "xyz/openbmc_project/Chassis/Common/error.hpp"
+#include "xyz/openbmc_project/Chassis/Buttons/ID/server.hpp"
+#include "common.hpp"
+#include "gpio.hpp"
+
+const static constexpr char *ID_BUTTON = "ID_BTN";
+
+struct IDButton
+ : sdbusplus::server::object::object<
+ sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::ID>
+{
+
+ IDButton(sdbusplus::bus::bus& bus, const char* path,
+ EventPtr& event,
+ sd_event_io_handler_t handler = IDButton::EventHandler) :
+ sdbusplus::server::object::object<
+ sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::ID>(
+ bus, path),
+ fd(-1), bus(bus), event(event), callbackHandler(handler)
+ {
+
+ int ret = -1;
+
+ // config gpio
+ ret = ::configGpio(ID_BUTTON, &fd, bus);
+ if (ret < 0)
+ {
+ phosphor::logging::log<phosphor::logging::level::ERR>(
+ "ID_BUTTON: failed to config GPIO");
+ throw sdbusplus::xyz::openbmc_project::Chassis::Common::
+ Error::IOError();
+ }
+
+ ret = sd_event_add_io(event.get(), nullptr, fd, EPOLLPRI,
+ callbackHandler, this);
+ if (ret < 0)
+ {
+ phosphor::logging::log<phosphor::logging::level::ERR>(
+ "ID_BUTTON: failed to add to event loop");
+ ::closeGpio(fd);
+ throw sdbusplus::xyz::openbmc_project::Chassis::Common::
+ Error::IOError();
+ }
+ }
+
+ ~IDButton()
+ {
+ ::closeGpio(fd);
+ }
+
+ void simPress() override;
+
+ static int EventHandler(sd_event_source* es, int fd,
+ uint32_t revents, void* userdata)
+ {
+
+ int n = -1;
+ char buf = '0';
+
+ if (!userdata)
+ {
+ phosphor::logging::log<phosphor::logging::level::ERR>(
+ "ID_BUTTON: userdata null!");
+ throw sdbusplus::xyz::openbmc_project::Chassis::Common::
+ Error::IOError();
+ }
+
+ IDButton* idButton = static_cast<IDButton*>(userdata);
+
+ if (!idButton)
+ {
+ phosphor::logging::log<phosphor::logging::level::ERR>(
+ "ID_BUTTON: null pointer!");
+ throw sdbusplus::xyz::openbmc_project::Chassis::Common::
+ Error::IOError();
+ }
+
+ n = ::lseek(fd, 0, SEEK_SET);
+
+ if (n < 0)
+ {
+ phosphor::logging::log<phosphor::logging::level::ERR>(
+ "ID_BUTTON: lseek error!");
+ throw sdbusplus::xyz::openbmc_project::Chassis::Common::
+ Error::IOError();
+ }
+
+ n = ::read(fd, &buf, sizeof(buf));
+ if (n < 0)
+ {
+ phosphor::logging::log<phosphor::logging::level::ERR>(
+ "ID_BUTTON: read error!");
+ throw sdbusplus::xyz::openbmc_project::Chassis::Common::
+ Error::IOError();
+ }
+
+ if (buf == '0')
+ {
+ phosphor::logging::log<phosphor::logging::level::DEBUG>(
+ "ID_BUTTON: pressed");
+ // emit pressed signal
+ idButton->pressed();
+ }
+ else
+ {
+ phosphor::logging::log<phosphor::logging::level::DEBUG>(
+ "ID_BUTTON: released");
+ // released
+ idButton->released();
+ }
+
+ return 0;
+ }
+
+ private:
+ int fd;
+ sdbusplus::bus::bus& bus;
+ EventPtr& event;
+ sd_event_io_handler_t callbackHandler;
+};