xref: /openbmc/phosphor-power/power-sequencer/ucd90160.hpp (revision b54357f6)

#pragma once

#include <algorithm>
#include <map>
#include <vector>
#include "device.hpp"
#include "pmbus.hpp"
#include "types.hpp"

namespace witherspoon
{
namespace power
{

/**
 * @class UCD90160
 *
 * This class implements fault analysis for the UCD90160
 * power sequencer device.
 *
 */
class UCD90160 : public Device
{
    public:

        UCD90160() = delete;
        ~UCD90160() = default;
        UCD90160(const UCD90160&) = delete;
        UCD90160& operator=(const UCD90160&) = delete;
        UCD90160(UCD90160&&) = default;
        UCD90160& operator=(UCD90160&&) = default;

        /**
         * Constructor
         *
         * @param[in] instance - the device instance number
         */
        UCD90160(size_t instance);

        /**
         * Analyzes the device for errors when the device is
         * known to be in an error state.  A log will be created.
         */
        void onFailure() override;

        /**
         * Checks the device for errors and only creates a log
         * if one is found.
         */
        void analyze() override;

        /**
         * Clears faults in the device
         */
        void clearFaults() override;

    private:

        /**
         * Checks for VOUT faults on the device.
         *
         * This device can monitor voltages of its dependent
         * devices, and VOUT faults are voltage faults
         * on these devices.
         *
         * @return bool - true if an error log was created
         */
        bool checkVOUTFaults();

        /**
         * Checks for PGOOD faults on the device.
         *
         * This device can monitor the PGOOD signals of its dependent
         * devices, and this check will look for faults of
         * those PGOODs.
         *
         * @param[in] polling - If this is running while polling for errors,
         *                      as opposing to analyzing a fail condition.
         *
         * @return bool - true if an error log was created
         */
         bool checkPGOODFaults(bool polling);

        /**
         * Creates an error log when the device has an error
         * but it isn't a PGOOD or voltage failure.
         */
        void createPowerFaultLog();

        /**
         * The read/write interface to this hardware
         */
        pmbus::PMBus interface;

        /**
         * Keeps track of device access errors to avoid repeatedly
         * logging errors for bad hardware
         */
        bool accessError = false;

        /**
         * Map of device instance to the instance specific data
         */
        static const ucd90160::DeviceMap deviceMap;
};

}
}