Add PGOODMonitor class
This class checks that PGOOD comes on in the amount of
time specified. If it doesn't, it will create an error log.
Future commits will analyze the power sequencer chip for failures
in this case so a better callout can be done.
Change-Id: Ia3679e5a7d36103f908b70aa0301cd012b0e7b20
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/power-sequencer/pgood_monitor.hpp b/power-sequencer/pgood_monitor.hpp
new file mode 100644
index 0000000..611cac6
--- /dev/null
+++ b/power-sequencer/pgood_monitor.hpp
@@ -0,0 +1,121 @@
+#pragma once
+
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/server.hpp>
+#include "event.hpp"
+#include "timer.hpp"
+
+namespace witherspoon
+{
+namespace power
+{
+
+/**
+ * @class PGOODMonitor
+ *
+ * Monitors PGOOD and creates an error if it doesn't come on in time.
+ *
+ * The run() function is designed to be called right after the
+ * power sequencer device is told to kick off a power on.
+ *
+ * Future commits will analyze the power sequencer chip for errors
+ * on a PGOOD fail.
+ */
+class PGOODMonitor
+{
+ public:
+
+ PGOODMonitor() = delete;
+ ~PGOODMonitor() = default;
+ PGOODMonitor(const PGOODMonitor&) = delete;
+ PGOODMonitor& operator=(const PGOODMonitor&) = delete;
+ PGOODMonitor(PGOODMonitor&&) = delete;
+ PGOODMonitor& operator=(PGOODMonitor&&) = delete;
+
+ /**
+ * Constructor
+ *
+ * @param[in] b - D-Bus bus object
+ * @param[in] e - event object
+ * @param[in] t - time to allow PGOOD to come up
+ */
+ PGOODMonitor(sdbusplus::bus::bus& b,
+ event::Event& e,
+ std::chrono::seconds& t) :
+ bus(b),
+ event(e),
+ interval(t),
+ timer(e, [this]() { this->analyze(); })
+ {
+ }
+
+ /**
+ * The timer callback.
+ *
+ * Creates a PGOOD failure error log.
+ */
+ void analyze();
+
+ /**
+ * Waits a specified amount of time for PGOOD to
+ * come on, and if it fails to come on in that time
+ * an error log will be created.
+ *
+ * @return - the return value from sd_event_loop()
+ */
+ int run();
+
+ private:
+
+ /**
+ * Enables the properties changed signal callback
+ * on the power object so we can tell when PGOOD
+ * comes on.
+ */
+ void startListening();
+
+ /**
+ * The callback function for the properties changed
+ * signal.
+ */
+ void propertyChanged();
+
+ /**
+ * Returns true if the system has been turned on
+ * but PGOOD isn't up yet.
+ */
+ bool pgoodPending();
+
+ /**
+ * Used to break out of the event loop in run()
+ */
+ void exitEventLoop();
+
+ /**
+ * The D-Bus object
+ */
+ sdbusplus::bus::bus& bus;
+
+ /**
+ * The match object for the properties changed signal
+ */
+ std::unique_ptr<sdbusplus::bus::match_t> match;
+
+ /**
+ * The sd_event structure used by the timer
+ */
+ event::Event& event;
+
+ /**
+ * The amount of time to wait for PGOOD to turn on
+ */
+ std::chrono::seconds interval;
+
+ /**
+ * The timer used to do the callback
+ */
+ Timer timer;
+};
+
+}
+}