Add Host selector button interface
This change includes new button interface
for the host selector switch.
The button handler code is adapted to support
both single host and multiple host power control
dbus events.
design : https://gerrit.openbmc-project.xyz/c/openbmc/docs/+/45544
Signed-off-by: Naveen Moses <naveen.mosess@hcl.com>
Change-Id: Icbfb22baaee057fd255c3ab0cba129693b913a9d
diff --git a/inc/hostSelector_switch.hpp b/inc/hostSelector_switch.hpp
new file mode 100644
index 0000000..acdae19
--- /dev/null
+++ b/inc/hostSelector_switch.hpp
@@ -0,0 +1,76 @@
+#pragma once
+#include "button_factory.hpp"
+#include "button_interface.hpp"
+#include "common.hpp"
+#include "gpio.hpp"
+#include "xyz/openbmc_project/Chassis/Buttons/HostSelector/server.hpp"
+#include "xyz/openbmc_project/Chassis/Common/error.hpp"
+
+#include <unistd.h>
+
+#include <fstream>
+#include <iostream>
+#include <nlohmann/json.hpp>
+#include <phosphor-logging/elog-errors.hpp>
+
+static constexpr std::string_view HOST_SELECTOR = "HOST_SELECTOR";
+
+static constexpr auto INVALID_INDEX = std::numeric_limits<size_t>::max();
+
+enum class GpioState
+{
+ low,
+ high
+};
+
+class HostSelector final : public sdbusplus::server::object_t<
+ sdbusplus::xyz::openbmc_project::Chassis::
+ Buttons::server::HostSelector>,
+ public ButtonIface
+{
+ public:
+ HostSelector(sdbusplus::bus::bus& bus, const char* path, EventPtr& event,
+ buttonConfig& buttonCfg) :
+ sdbusplus::server::object_t<sdbusplus::xyz::openbmc_project::Chassis::
+ Buttons::server::HostSelector>(
+ bus, path, action::defer_emit),
+ ButtonIface(bus, event, buttonCfg)
+ {
+ init();
+ // read and store the host selector position Map
+ hsPosMap = buttonCfg.extraJsonInfo.at("host_selector_map")
+ .get<std::map<std::string, int>>();
+ maxPosition(buttonCfg.extraJsonInfo["max_position"], true);
+ gpioLineCount = buttonCfg.gpios.size();
+ setInitialHostSelectorValue();
+ emit_object_added();
+ }
+
+ ~HostSelector()
+ {
+ deInit();
+ }
+
+ static constexpr std::string_view getFormFactorName()
+ {
+ return HOST_SELECTOR;
+ }
+
+ static const char* getDbusObjectPath()
+ {
+ return HS_DBUS_OBJECT_NAME;
+ }
+ void handleEvent(sd_event_source* es, int fd, uint32_t revents) override;
+ size_t getMappedHSConfig(size_t hsPosition);
+ size_t getGpioIndex(int fd);
+ void setInitialHostSelectorValue(void);
+ void setHostSelectorValue(int fd, GpioState state);
+
+ protected:
+ size_t hostSelectorPosition = 0;
+ size_t gpioLineCount;
+
+ // map of read Host selector switch value and corresponding host number
+ // value.
+ std::map<std::string, int> hsPosMap;
+};