// SPDX-License-Identifier: GPL-2.0-or-later

  /*

   *  (c) 1999 Andreas Gal		<gal@cs.uni-magdeburg.de>
   *  (c) 2000-2001 Vojtech Pavlik	<vojtech@ucw.cz>

   *  (c) 2007-2009 Jiri Kosina

   *

   *  HID debugging support

   */
  
  /*

   *
   * Should you need to contact me, the author, you can do so either by
   * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
   * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
   */

  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

  #include <linux/debugfs.h>
  #include <linux/seq_file.h>

  #include <linux/kfifo.h>

  #include <linux/sched/signal.h>

  #include <linux/export.h>

  #include <linux/slab.h>

  #include <linux/uaccess.h>
  #include <linux/poll.h>

  #include <linux/hid.h>

  #include <linux/hid-debug.h>

  static struct dentry *hid_debug_root;

  struct hid_usage_entry {
  	unsigned  page;
  	unsigned  usage;

  	const char     *description;

  };
  
  static const struct hid_usage_entry hid_usage_table[] = {
    {  0,      0, "Undefined" },
    {  1,      0, "GenericDesktop" },
      {0, 0x01, "Pointer"},
      {0, 0x02, "Mouse"},
      {0, 0x04, "Joystick"},
      {0, 0x05, "GamePad"},
      {0, 0x06, "Keyboard"},
      {0, 0x07, "Keypad"},
      {0, 0x08, "MultiAxis"},
        {0, 0x30, "X"},
        {0, 0x31, "Y"},
        {0, 0x32, "Z"},
        {0, 0x33, "Rx"},
        {0, 0x34, "Ry"},
        {0, 0x35, "Rz"},
        {0, 0x36, "Slider"},
        {0, 0x37, "Dial"},
        {0, 0x38, "Wheel"},
        {0, 0x39, "HatSwitch"},
      {0, 0x3a, "CountedBuffer"},
        {0, 0x3b, "ByteCount"},
        {0, 0x3c, "MotionWakeup"},
        {0, 0x3d, "Start"},
        {0, 0x3e, "Select"},
        {0, 0x40, "Vx"},
        {0, 0x41, "Vy"},
        {0, 0x42, "Vz"},
        {0, 0x43, "Vbrx"},
        {0, 0x44, "Vbry"},
        {0, 0x45, "Vbrz"},
        {0, 0x46, "Vno"},
      {0, 0x80, "SystemControl"},
        {0, 0x81, "SystemPowerDown"},
        {0, 0x82, "SystemSleep"},
        {0, 0x83, "SystemWakeUp"},
        {0, 0x84, "SystemContextMenu"},
        {0, 0x85, "SystemMainMenu"},
        {0, 0x86, "SystemAppMenu"},
        {0, 0x87, "SystemMenuHelp"},
        {0, 0x88, "SystemMenuExit"},
        {0, 0x89, "SystemMenuSelect"},
        {0, 0x8a, "SystemMenuRight"},
        {0, 0x8b, "SystemMenuLeft"},
        {0, 0x8c, "SystemMenuUp"},
        {0, 0x8d, "SystemMenuDown"},
        {0, 0x90, "D-PadUp"},
        {0, 0x91, "D-PadDown"},
        {0, 0x92, "D-PadRight"},
        {0, 0x93, "D-PadLeft"},
    {  2, 0, "Simulation" },
        {0, 0xb0, "Aileron"},
        {0, 0xb1, "AileronTrim"},
        {0, 0xb2, "Anti-Torque"},
        {0, 0xb3, "Autopilot"},
        {0, 0xb4, "Chaff"},
        {0, 0xb5, "Collective"},
        {0, 0xb6, "DiveBrake"},
        {0, 0xb7, "ElectronicCountermeasures"},
        {0, 0xb8, "Elevator"},
        {0, 0xb9, "ElevatorTrim"},
        {0, 0xba, "Rudder"},
        {0, 0xbb, "Throttle"},
        {0, 0xbc, "FlightCommunications"},
        {0, 0xbd, "FlareRelease"},
        {0, 0xbe, "LandingGear"},
        {0, 0xbf, "ToeBrake"},

    {  6, 0, "GenericDeviceControls" },
        {0, 0x20, "BatteryStrength" },
        {0, 0x21, "WirelessChannel" },
        {0, 0x22, "WirelessID" },
        {0, 0x23, "DiscoverWirelessControl" },
        {0, 0x24, "SecurityCodeCharacterEntered" },
        {0, 0x25, "SecurityCodeCharactedErased" },
        {0, 0x26, "SecurityCodeCleared" },

    {  7, 0, "Keyboard" },
    {  8, 0, "LED" },
        {0, 0x01, "NumLock"},
        {0, 0x02, "CapsLock"},
        {0, 0x03, "ScrollLock"},
        {0, 0x04, "Compose"},
        {0, 0x05, "Kana"},
        {0, 0x4b, "GenericIndicator"},
    {  9, 0, "Button" },
    { 10, 0, "Ordinal" },
    { 12, 0, "Consumer" },
        {0, 0x238, "HorizontalWheel"},
    { 13, 0, "Digitizers" },
      {0, 0x01, "Digitizer"},
      {0, 0x02, "Pen"},
      {0, 0x03, "LightPen"},
      {0, 0x04, "TouchScreen"},
      {0, 0x05, "TouchPad"},

      {0, 0x0e, "DeviceConfiguration"},

      {0, 0x20, "Stylus"},
      {0, 0x21, "Puck"},
      {0, 0x22, "Finger"},

      {0, 0x23, "DeviceSettings"},

      {0, 0x30, "TipPressure"},
      {0, 0x31, "BarrelPressure"},
      {0, 0x32, "InRange"},
      {0, 0x33, "Touch"},
      {0, 0x34, "UnTouch"},
      {0, 0x35, "Tap"},
      {0, 0x39, "TabletFunctionKey"},
      {0, 0x3a, "ProgramChangeKey"},
      {0, 0x3c, "Invert"},
      {0, 0x42, "TipSwitch"},
      {0, 0x43, "SecondaryTipSwitch"},
      {0, 0x44, "BarrelSwitch"},
      {0, 0x45, "Eraser"},
      {0, 0x46, "TabletPick"},

      {0, 0x47, "Confidence"},
      {0, 0x48, "Width"},
      {0, 0x49, "Height"},
      {0, 0x51, "ContactID"},
      {0, 0x52, "InputMode"},
      {0, 0x53, "DeviceIndex"},
      {0, 0x54, "ContactCount"},
      {0, 0x55, "ContactMaximumNumber"},

      {0, 0x59, "ButtonType"},

      {0, 0x5A, "SecondaryBarrelSwitch"},
      {0, 0x5B, "TransducerSerialNumber"},

    { 15, 0, "PhysicalInterfaceDevice" },
      {0, 0x00, "Undefined"},
      {0, 0x01, "Physical_Interface_Device"},
        {0, 0x20, "Normal"},
      {0, 0x21, "Set_Effect_Report"},
        {0, 0x22, "Effect_Block_Index"},
        {0, 0x23, "Parameter_Block_Offset"},
        {0, 0x24, "ROM_Flag"},
        {0, 0x25, "Effect_Type"},
          {0, 0x26, "ET_Constant_Force"},
          {0, 0x27, "ET_Ramp"},
          {0, 0x28, "ET_Custom_Force_Data"},
          {0, 0x30, "ET_Square"},
          {0, 0x31, "ET_Sine"},
          {0, 0x32, "ET_Triangle"},
          {0, 0x33, "ET_Sawtooth_Up"},
          {0, 0x34, "ET_Sawtooth_Down"},
          {0, 0x40, "ET_Spring"},
          {0, 0x41, "ET_Damper"},
          {0, 0x42, "ET_Inertia"},
          {0, 0x43, "ET_Friction"},
        {0, 0x50, "Duration"},
        {0, 0x51, "Sample_Period"},
        {0, 0x52, "Gain"},
        {0, 0x53, "Trigger_Button"},
        {0, 0x54, "Trigger_Repeat_Interval"},
        {0, 0x55, "Axes_Enable"},
          {0, 0x56, "Direction_Enable"},
        {0, 0x57, "Direction"},
        {0, 0x58, "Type_Specific_Block_Offset"},
          {0, 0x59, "Block_Type"},
          {0, 0x5A, "Set_Envelope_Report"},
            {0, 0x5B, "Attack_Level"},
            {0, 0x5C, "Attack_Time"},
            {0, 0x5D, "Fade_Level"},
            {0, 0x5E, "Fade_Time"},
          {0, 0x5F, "Set_Condition_Report"},
          {0, 0x60, "CP_Offset"},
          {0, 0x61, "Positive_Coefficient"},
          {0, 0x62, "Negative_Coefficient"},
          {0, 0x63, "Positive_Saturation"},
          {0, 0x64, "Negative_Saturation"},
          {0, 0x65, "Dead_Band"},
        {0, 0x66, "Download_Force_Sample"},
        {0, 0x67, "Isoch_Custom_Force_Enable"},
        {0, 0x68, "Custom_Force_Data_Report"},
          {0, 0x69, "Custom_Force_Data"},
          {0, 0x6A, "Custom_Force_Vendor_Defined_Data"},
        {0, 0x6B, "Set_Custom_Force_Report"},
          {0, 0x6C, "Custom_Force_Data_Offset"},
          {0, 0x6D, "Sample_Count"},
        {0, 0x6E, "Set_Periodic_Report"},
          {0, 0x6F, "Offset"},
          {0, 0x70, "Magnitude"},
          {0, 0x71, "Phase"},
          {0, 0x72, "Period"},
        {0, 0x73, "Set_Constant_Force_Report"},
          {0, 0x74, "Set_Ramp_Force_Report"},
          {0, 0x75, "Ramp_Start"},
          {0, 0x76, "Ramp_End"},
        {0, 0x77, "Effect_Operation_Report"},
          {0, 0x78, "Effect_Operation"},
            {0, 0x79, "Op_Effect_Start"},
            {0, 0x7A, "Op_Effect_Start_Solo"},
            {0, 0x7B, "Op_Effect_Stop"},
            {0, 0x7C, "Loop_Count"},
        {0, 0x7D, "Device_Gain_Report"},
          {0, 0x7E, "Device_Gain"},
      {0, 0x7F, "PID_Pool_Report"},
        {0, 0x80, "RAM_Pool_Size"},
        {0, 0x81, "ROM_Pool_Size"},
        {0, 0x82, "ROM_Effect_Block_Count"},
        {0, 0x83, "Simultaneous_Effects_Max"},
        {0, 0x84, "Pool_Alignment"},
      {0, 0x85, "PID_Pool_Move_Report"},
        {0, 0x86, "Move_Source"},
        {0, 0x87, "Move_Destination"},
        {0, 0x88, "Move_Length"},
      {0, 0x89, "PID_Block_Load_Report"},
        {0, 0x8B, "Block_Load_Status"},
        {0, 0x8C, "Block_Load_Success"},
        {0, 0x8D, "Block_Load_Full"},
        {0, 0x8E, "Block_Load_Error"},
        {0, 0x8F, "Block_Handle"},
        {0, 0x90, "PID_Block_Free_Report"},
        {0, 0x91, "Type_Specific_Block_Handle"},
      {0, 0x92, "PID_State_Report"},
        {0, 0x94, "Effect_Playing"},
        {0, 0x95, "PID_Device_Control_Report"},
          {0, 0x96, "PID_Device_Control"},
          {0, 0x97, "DC_Enable_Actuators"},
          {0, 0x98, "DC_Disable_Actuators"},
          {0, 0x99, "DC_Stop_All_Effects"},
          {0, 0x9A, "DC_Device_Reset"},
          {0, 0x9B, "DC_Device_Pause"},
          {0, 0x9C, "DC_Device_Continue"},
        {0, 0x9F, "Device_Paused"},
        {0, 0xA0, "Actuators_Enabled"},
        {0, 0xA4, "Safety_Switch"},
        {0, 0xA5, "Actuator_Override_Switch"},
        {0, 0xA6, "Actuator_Power"},
      {0, 0xA7, "Start_Delay"},
      {0, 0xA8, "Parameter_Block_Size"},
      {0, 0xA9, "Device_Managed_Pool"},
      {0, 0xAA, "Shared_Parameter_Blocks"},
      {0, 0xAB, "Create_New_Effect_Report"},
      {0, 0xAC, "RAM_Pool_Available"},

    {  0x20, 0, "Sensor" },
      { 0x20, 0x01, "Sensor" },
      { 0x20, 0x10, "Biometric" },
        { 0x20, 0x11, "BiometricHumanPresence" },
        { 0x20, 0x12, "BiometricHumanProximity" },
        { 0x20, 0x13, "BiometricHumanTouch" },
      { 0x20, 0x20, "Electrical" },
        { 0x20, 0x21, "ElectricalCapacitance" },
        { 0x20, 0x22, "ElectricalCurrent" },
        { 0x20, 0x23, "ElectricalPower" },
        { 0x20, 0x24, "ElectricalInductance" },
        { 0x20, 0x25, "ElectricalResistance" },
        { 0x20, 0x26, "ElectricalVoltage" },
        { 0x20, 0x27, "ElectricalPoteniometer" },
        { 0x20, 0x28, "ElectricalFrequency" },
        { 0x20, 0x29, "ElectricalPeriod" },
      { 0x20, 0x30, "Environmental" },
        { 0x20, 0x31, "EnvironmentalAtmosphericPressure" },
        { 0x20, 0x32, "EnvironmentalHumidity" },
        { 0x20, 0x33, "EnvironmentalTemperature" },
        { 0x20, 0x34, "EnvironmentalWindDirection" },
        { 0x20, 0x35, "EnvironmentalWindSpeed" },
      { 0x20, 0x40, "Light" },
        { 0x20, 0x41, "LightAmbientLight" },
        { 0x20, 0x42, "LightConsumerInfrared" },
      { 0x20, 0x50, "Location" },
        { 0x20, 0x51, "LocationBroadcast" },
        { 0x20, 0x52, "LocationDeadReckoning" },
        { 0x20, 0x53, "LocationGPS" },
        { 0x20, 0x54, "LocationLookup" },
        { 0x20, 0x55, "LocationOther" },
        { 0x20, 0x56, "LocationStatic" },
        { 0x20, 0x57, "LocationTriangulation" },
      { 0x20, 0x60, "Mechanical" },
        { 0x20, 0x61, "MechanicalBooleanSwitch" },
        { 0x20, 0x62, "MechanicalBooleanSwitchArray" },
        { 0x20, 0x63, "MechanicalMultivalueSwitch" },
        { 0x20, 0x64, "MechanicalForce" },
        { 0x20, 0x65, "MechanicalPressure" },
        { 0x20, 0x66, "MechanicalStrain" },
        { 0x20, 0x67, "MechanicalWeight" },
        { 0x20, 0x68, "MechanicalHapticVibrator" },
        { 0x20, 0x69, "MechanicalHallEffectSwitch" },
      { 0x20, 0x70, "Motion" },
        { 0x20, 0x71, "MotionAccelerometer1D" },
        { 0x20, 0x72, "MotionAccelerometer2D" },
        { 0x20, 0x73, "MotionAccelerometer3D" },
        { 0x20, 0x74, "MotionGyrometer1D" },
        { 0x20, 0x75, "MotionGyrometer2D" },
        { 0x20, 0x76, "MotionGyrometer3D" },
        { 0x20, 0x77, "MotionMotionDetector" },
        { 0x20, 0x78, "MotionSpeedometer" },
        { 0x20, 0x79, "MotionAccelerometer" },
        { 0x20, 0x7A, "MotionGyrometer" },
      { 0x20, 0x80, "Orientation" },
        { 0x20, 0x81, "OrientationCompass1D" },
        { 0x20, 0x82, "OrientationCompass2D" },
        { 0x20, 0x83, "OrientationCompass3D" },
        { 0x20, 0x84, "OrientationInclinometer1D" },
        { 0x20, 0x85, "OrientationInclinometer2D" },
        { 0x20, 0x86, "OrientationInclinometer3D" },
        { 0x20, 0x87, "OrientationDistance1D" },
        { 0x20, 0x88, "OrientationDistance2D" },
        { 0x20, 0x89, "OrientationDistance3D" },
        { 0x20, 0x8A, "OrientationDeviceOrientation" },
        { 0x20, 0x8B, "OrientationCompass" },
        { 0x20, 0x8C, "OrientationInclinometer" },
        { 0x20, 0x8D, "OrientationDistance" },
      { 0x20, 0x90, "Scanner" },
        { 0x20, 0x91, "ScannerBarcode" },
        { 0x20, 0x91, "ScannerRFID" },
        { 0x20, 0x91, "ScannerNFC" },
      { 0x20, 0xA0, "Time" },
        { 0x20, 0xA1, "TimeAlarmTimer" },
        { 0x20, 0xA2, "TimeRealTimeClock" },
      { 0x20, 0xE0, "Other" },
        { 0x20, 0xE1, "OtherCustom" },
        { 0x20, 0xE2, "OtherGeneric" },
        { 0x20, 0xE3, "OtherGenericEnumerator" },

    { 0x84, 0, "Power Device" },
      { 0x84, 0x02, "PresentStatus" },
      { 0x84, 0x03, "ChangeStatus" },
      { 0x84, 0x04, "UPS" },
      { 0x84, 0x05, "PowerSupply" },
      { 0x84, 0x10, "BatterySystem" },
      { 0x84, 0x11, "BatterySystemID" },
      { 0x84, 0x12, "Battery" },
      { 0x84, 0x13, "BatteryID" },
      { 0x84, 0x14, "Charger" },
      { 0x84, 0x15, "ChargerID" },
      { 0x84, 0x16, "PowerConverter" },
      { 0x84, 0x17, "PowerConverterID" },
      { 0x84, 0x18, "OutletSystem" },
      { 0x84, 0x19, "OutletSystemID" },
      { 0x84, 0x1a, "Input" },
      { 0x84, 0x1b, "InputID" },
      { 0x84, 0x1c, "Output" },
      { 0x84, 0x1d, "OutputID" },
      { 0x84, 0x1e, "Flow" },
      { 0x84, 0x1f, "FlowID" },
      { 0x84, 0x20, "Outlet" },
      { 0x84, 0x21, "OutletID" },
      { 0x84, 0x22, "Gang" },
      { 0x84, 0x24, "PowerSummary" },
      { 0x84, 0x25, "PowerSummaryID" },
      { 0x84, 0x30, "Voltage" },
      { 0x84, 0x31, "Current" },
      { 0x84, 0x32, "Frequency" },
      { 0x84, 0x33, "ApparentPower" },
      { 0x84, 0x35, "PercentLoad" },
      { 0x84, 0x40, "ConfigVoltage" },
      { 0x84, 0x41, "ConfigCurrent" },
      { 0x84, 0x43, "ConfigApparentPower" },
      { 0x84, 0x53, "LowVoltageTransfer" },
      { 0x84, 0x54, "HighVoltageTransfer" },
      { 0x84, 0x56, "DelayBeforeStartup" },
      { 0x84, 0x57, "DelayBeforeShutdown" },
      { 0x84, 0x58, "Test" },
      { 0x84, 0x5a, "AudibleAlarmControl" },
      { 0x84, 0x60, "Present" },
      { 0x84, 0x61, "Good" },
      { 0x84, 0x62, "InternalFailure" },
      { 0x84, 0x65, "Overload" },
      { 0x84, 0x66, "OverCharged" },
      { 0x84, 0x67, "OverTemperature" },
      { 0x84, 0x68, "ShutdownRequested" },
      { 0x84, 0x69, "ShutdownImminent" },
      { 0x84, 0x6b, "SwitchOn/Off" },
      { 0x84, 0x6c, "Switchable" },
      { 0x84, 0x6d, "Used" },
      { 0x84, 0x6e, "Boost" },
      { 0x84, 0x73, "CommunicationLost" },
      { 0x84, 0xfd, "iManufacturer" },
      { 0x84, 0xfe, "iProduct" },
      { 0x84, 0xff, "iSerialNumber" },
    { 0x85, 0, "Battery System" },
      { 0x85, 0x01, "SMBBatteryMode" },
      { 0x85, 0x02, "SMBBatteryStatus" },
      { 0x85, 0x03, "SMBAlarmWarning" },
      { 0x85, 0x04, "SMBChargerMode" },
      { 0x85, 0x05, "SMBChargerStatus" },
      { 0x85, 0x06, "SMBChargerSpecInfo" },
      { 0x85, 0x07, "SMBSelectorState" },
      { 0x85, 0x08, "SMBSelectorPresets" },
      { 0x85, 0x09, "SMBSelectorInfo" },
      { 0x85, 0x29, "RemainingCapacityLimit" },
      { 0x85, 0x2c, "CapacityMode" },
      { 0x85, 0x42, "BelowRemainingCapacityLimit" },
      { 0x85, 0x44, "Charging" },
      { 0x85, 0x45, "Discharging" },
      { 0x85, 0x4b, "NeedReplacement" },
      { 0x85, 0x66, "RemainingCapacity" },
      { 0x85, 0x68, "RunTimeToEmpty" },
      { 0x85, 0x6a, "AverageTimeToFull" },
      { 0x85, 0x83, "DesignCapacity" },
      { 0x85, 0x85, "ManufacturerDate" },
      { 0x85, 0x89, "iDeviceChemistry" },

      { 0x85, 0x8b, "Rechargeable" },

      { 0x85, 0x8f, "iOEMInformation" },
      { 0x85, 0x8d, "CapacityGranularity1" },
      { 0x85, 0xd0, "ACPresent" },
    /* pages 0xff00 to 0xffff are vendor-specific */
    { 0xffff, 0, "Vendor-specific-FF" },
    { 0, 0, NULL }
  };

  /* Either output directly into simple seq_file, or (if f == NULL)
   * allocate a separate buffer that will then be passed to the 'events'
   * ringbuffer.
   *
   * This is because these functions can be called both for "one-shot"
   * "rdesc" while resolving, or for blocking "events".
   *
   * This holds both for resolv_usage_page() and hid_resolv_usage().
   */
  static char *resolv_usage_page(unsigned page, struct seq_file *f) {

  	const struct hid_usage_entry *p;

  	char *buf = NULL;
  
  	if (!f) {

  		buf = kzalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC);

  		if (!buf)
  			return ERR_PTR(-ENOMEM);
  	}

  
  	for (p = hid_usage_table; p->description; p++)
  		if (p->page == page) {

  			if (!f) {
  				snprintf(buf, HID_DEBUG_BUFSIZE, "%s",
  						p->description);
  				return buf;
  			}
  			else {

  				seq_printf(f, "%s", p->description);

  				return NULL;
  			}

  		}

  	if (!f)

  		snprintf(buf, HID_DEBUG_BUFSIZE, "%04x", page);

  	else
  		seq_printf(f, "%04x", page);

  	return buf;

  }

  char *hid_resolv_usage(unsigned usage, struct seq_file *f) {

  	const struct hid_usage_entry *p;

  	char *buf = NULL;
  	int len = 0;

  	buf = resolv_usage_page(usage >> 16, f);
  	if (IS_ERR(buf)) {

  		pr_err("error allocating HID debug buffer
  ");

  		return NULL;
  	}

  	if (!f) {
  		len = strlen(buf);
  		snprintf(buf+len, max(0, HID_DEBUG_BUFSIZE - len), ".");
  		len++;
  	}
  	else {

  		seq_printf(f, ".");

  	}

  	for (p = hid_usage_table; p->description; p++)
  		if (p->page == (usage >> 16)) {
  			for(++p; p->description && p->usage != 0; p++)
  				if (p->usage == (usage & 0xffff)) {

  					if (!f)

  						snprintf(buf + len,
  							max(0,HID_DEBUG_BUFSIZE - len - 1),
  							"%s", p->description);

  					else
  						seq_printf(f,
  							"%s",
  							p->description);

  					return buf;

  				}
  			break;
  		}

  	if (!f)

  		snprintf(buf + len, max(0, HID_DEBUG_BUFSIZE - len - 1),
  				"%04x", usage & 0xffff);

  	else
  		seq_printf(f, "%04x", usage & 0xffff);

  	return buf;

  }
  EXPORT_SYMBOL_GPL(hid_resolv_usage);

  static void tab(int n, struct seq_file *f) {
  	seq_printf(f, "%*s", n, "");

  }

  void hid_dump_field(struct hid_field *field, int n, struct seq_file *f) {

  	int j;
  
  	if (field->physical) {

  		tab(n, f);
  		seq_printf(f, "Physical(");
  		hid_resolv_usage(field->physical, f); seq_printf(f, ")
  ");

  	}
  	if (field->logical) {

  		tab(n, f);
  		seq_printf(f, "Logical(");
  		hid_resolv_usage(field->logical, f); seq_printf(f, ")
  ");

  	}

  	if (field->application) {
  		tab(n, f);
  		seq_printf(f, "Application(");
  		hid_resolv_usage(field->application, f); seq_printf(f, ")
  ");
  	}

  	tab(n, f); seq_printf(f, "Usage(%d)
  ", field->maxusage);

  	for (j = 0; j < field->maxusage; j++) {

  		tab(n+2, f); hid_resolv_usage(field->usage[j].hid, f); seq_printf(f, "
  ");

  	}
  	if (field->logical_minimum != field->logical_maximum) {

  		tab(n, f); seq_printf(f, "Logical Minimum(%d)
  ", field->logical_minimum);
  		tab(n, f); seq_printf(f, "Logical Maximum(%d)
  ", field->logical_maximum);

  	}
  	if (field->physical_minimum != field->physical_maximum) {

  		tab(n, f); seq_printf(f, "Physical Minimum(%d)
  ", field->physical_minimum);
  		tab(n, f); seq_printf(f, "Physical Maximum(%d)
  ", field->physical_maximum);

  	}
  	if (field->unit_exponent) {

  		tab(n, f); seq_printf(f, "Unit Exponent(%d)
  ", field->unit_exponent);

  	}
  	if (field->unit) {

  		static const char *systems[5] = { "None", "SI Linear", "SI Rotation", "English Linear", "English Rotation" };
  		static const char *units[5][8] = {

  			{ "None", "None", "None", "None", "None", "None", "None", "None" },
  			{ "None", "Centimeter", "Gram", "Seconds", "Kelvin",     "Ampere", "Candela", "None" },
  			{ "None", "Radians",    "Gram", "Seconds", "Kelvin",     "Ampere", "Candela", "None" },
  			{ "None", "Inch",       "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" },
  			{ "None", "Degrees",    "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" }
  		};
  
  		int i;
  		int sys;
                  __u32 data = field->unit;
  
  		/* First nibble tells us which system we're in. */
  		sys = data & 0xf;
  		data >>= 4;
  
  		if(sys > 4) {

  			tab(n, f); seq_printf(f, "Unit(Invalid)
  ");

  		}
  		else {
  			int earlier_unit = 0;

  			tab(n, f); seq_printf(f, "Unit(%s : ", systems[sys]);

  
  			for (i=1 ; i<sizeof(__u32)*2 ; i++) {
  				char nibble = data & 0xf;
  				data >>= 4;
  				if (nibble != 0) {
  					if(earlier_unit++ > 0)

  						seq_printf(f, "*");
  					seq_printf(f, "%s", units[sys][i]);

  					if(nibble != 1) {
  						/* This is a _signed_ nibble(!) */
  
  						int val = nibble & 0x7;
  						if(nibble & 0x08)
  							val = -((0x7 & ~val) +1);

  						seq_printf(f, "^%d", val);

  					}
  				}
  			}

  			seq_printf(f, ")
  ");

  		}
  	}

  	tab(n, f); seq_printf(f, "Report Size(%u)
  ", field->report_size);
  	tab(n, f); seq_printf(f, "Report Count(%u)
  ", field->report_count);
  	tab(n, f); seq_printf(f, "Report Offset(%u)
  ", field->report_offset);

  	tab(n, f); seq_printf(f, "Flags( ");

  	j = field->flags;

  	seq_printf(f, "%s", HID_MAIN_ITEM_CONSTANT & j ? "Constant " : "");
  	seq_printf(f, "%s", HID_MAIN_ITEM_VARIABLE & j ? "Variable " : "Array ");
  	seq_printf(f, "%s", HID_MAIN_ITEM_RELATIVE & j ? "Relative " : "Absolute ");
  	seq_printf(f, "%s", HID_MAIN_ITEM_WRAP & j ? "Wrap " : "");
  	seq_printf(f, "%s", HID_MAIN_ITEM_NONLINEAR & j ? "NonLinear " : "");
  	seq_printf(f, "%s", HID_MAIN_ITEM_NO_PREFERRED & j ? "NoPreferredState " : "");
  	seq_printf(f, "%s", HID_MAIN_ITEM_NULL_STATE & j ? "NullState " : "");
  	seq_printf(f, "%s", HID_MAIN_ITEM_VOLATILE & j ? "Volatile " : "");
  	seq_printf(f, "%s", HID_MAIN_ITEM_BUFFERED_BYTE & j ? "BufferedByte " : "");
  	seq_printf(f, ")
  ");

  }
  EXPORT_SYMBOL_GPL(hid_dump_field);

  void hid_dump_device(struct hid_device *device, struct seq_file *f)
  {

  	struct hid_report_enum *report_enum;
  	struct hid_report *report;
  	struct list_head *list;
  	unsigned i,k;

  	static const char *table[] = {"INPUT", "OUTPUT", "FEATURE"};

  
  	for (i = 0; i < HID_REPORT_TYPES; i++) {
  		report_enum = device->report_enum + i;
  		list = report_enum->report_list.next;
  		while (list != &report_enum->report_list) {
  			report = (struct hid_report *) list;

  			tab(2, f);
  			seq_printf(f, "%s", table[i]);

  			if (report->id)

  				seq_printf(f, "(%d)", report->id);
  			seq_printf(f, "[%s]", table[report->type]);
  			seq_printf(f, "
  ");

  			for (k = 0; k < report->maxfield; k++) {

  				tab(4, f);
  				seq_printf(f, "Field(%d)
  ", k);
  				hid_dump_field(report->field[k], 6, f);

  			}
  			list = list->next;
  		}
  	}
  }
  EXPORT_SYMBOL_GPL(hid_dump_device);

  /* enqueue string to 'events' ring buffer */
  void hid_debug_event(struct hid_device *hdev, char *buf)
  {

  	struct hid_debug_list *list;

  	unsigned long flags;

  	spin_lock_irqsave(&hdev->debug_list_lock, flags);

  	list_for_each_entry(list, &hdev->debug_list, node)
  		kfifo_in(&list->hid_debug_fifo, buf, strlen(buf));

  	spin_unlock_irqrestore(&hdev->debug_list_lock, flags);

  
  	wake_up_interruptible(&hdev->debug_wait);

  }
  EXPORT_SYMBOL_GPL(hid_debug_event);

  void hid_dump_report(struct hid_device *hid, int type, u8 *data,
  		int size)
  {
  	struct hid_report_enum *report_enum;
  	char *buf;
  	unsigned int i;

  	buf = kmalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC);

  
  	if (!buf)
  		return;
  
  	report_enum = hid->report_enum + type;
  
  	/* dump the report */
  	snprintf(buf, HID_DEBUG_BUFSIZE - 1,
  			"
  report (size %u) (%snumbered) = ", size,
  			report_enum->numbered ? "" : "un");
  	hid_debug_event(hid, buf);
  
  	for (i = 0; i < size; i++) {
  		snprintf(buf, HID_DEBUG_BUFSIZE - 1,
  				" %02x", data[i]);
  		hid_debug_event(hid, buf);
  	}
  	hid_debug_event(hid, "
  ");
  	kfree(buf);
  }
  EXPORT_SYMBOL_GPL(hid_dump_report);

  void hid_dump_input(struct hid_device *hdev, struct hid_usage *usage, __s32 value)
  {
  	char *buf;
  	int len;
  
  	buf = hid_resolv_usage(usage->hid, NULL);
  	if (!buf)

  		return;

  	len = strlen(buf);
  	snprintf(buf + len, HID_DEBUG_BUFSIZE - len - 1, " = %d
  ", value);
  
  	hid_debug_event(hdev, buf);
  
  	kfree(buf);

  	wake_up_interruptible(&hdev->debug_wait);

  }
  EXPORT_SYMBOL_GPL(hid_dump_input);

  static const char *events[EV_MAX + 1] = {

  	[EV_SYN] = "Sync",			[EV_KEY] = "Key",
  	[EV_REL] = "Relative",			[EV_ABS] = "Absolute",
  	[EV_MSC] = "Misc",			[EV_LED] = "LED",
  	[EV_SND] = "Sound",			[EV_REP] = "Repeat",
  	[EV_FF] = "ForceFeedback",		[EV_PWR] = "Power",
  	[EV_FF_STATUS] = "ForceFeedbackStatus",
  };

  static const char *syncs[3] = {

  	[SYN_REPORT] = "Report",		[SYN_CONFIG] = "Config",

  	[SYN_MT_REPORT] = "MT Report",

  };

  static const char *keys[KEY_MAX + 1] = {

  	[KEY_RESERVED] = "Reserved",		[KEY_ESC] = "Esc",
  	[KEY_1] = "1",				[KEY_2] = "2",
  	[KEY_3] = "3",				[KEY_4] = "4",
  	[KEY_5] = "5",				[KEY_6] = "6",
  	[KEY_7] = "7",				[KEY_8] = "8",
  	[KEY_9] = "9",				[KEY_0] = "0",
  	[KEY_MINUS] = "Minus",			[KEY_EQUAL] = "Equal",
  	[KEY_BACKSPACE] = "Backspace",		[KEY_TAB] = "Tab",
  	[KEY_Q] = "Q",				[KEY_W] = "W",
  	[KEY_E] = "E",				[KEY_R] = "R",
  	[KEY_T] = "T",				[KEY_Y] = "Y",
  	[KEY_U] = "U",				[KEY_I] = "I",
  	[KEY_O] = "O",				[KEY_P] = "P",
  	[KEY_LEFTBRACE] = "LeftBrace",		[KEY_RIGHTBRACE] = "RightBrace",
  	[KEY_ENTER] = "Enter",			[KEY_LEFTCTRL] = "LeftControl",
  	[KEY_A] = "A",				[KEY_S] = "S",
  	[KEY_D] = "D",				[KEY_F] = "F",
  	[KEY_G] = "G",				[KEY_H] = "H",
  	[KEY_J] = "J",				[KEY_K] = "K",
  	[KEY_L] = "L",				[KEY_SEMICOLON] = "Semicolon",
  	[KEY_APOSTROPHE] = "Apostrophe",	[KEY_GRAVE] = "Grave",
  	[KEY_LEFTSHIFT] = "LeftShift",		[KEY_BACKSLASH] = "BackSlash",
  	[KEY_Z] = "Z",				[KEY_X] = "X",
  	[KEY_C] = "C",				[KEY_V] = "V",
  	[KEY_B] = "B",				[KEY_N] = "N",
  	[KEY_M] = "M",				[KEY_COMMA] = "Comma",
  	[KEY_DOT] = "Dot",			[KEY_SLASH] = "Slash",
  	[KEY_RIGHTSHIFT] = "RightShift",	[KEY_KPASTERISK] = "KPAsterisk",
  	[KEY_LEFTALT] = "LeftAlt",		[KEY_SPACE] = "Space",
  	[KEY_CAPSLOCK] = "CapsLock",		[KEY_F1] = "F1",
  	[KEY_F2] = "F2",			[KEY_F3] = "F3",
  	[KEY_F4] = "F4",			[KEY_F5] = "F5",
  	[KEY_F6] = "F6",			[KEY_F7] = "F7",
  	[KEY_F8] = "F8",			[KEY_F9] = "F9",
  	[KEY_F10] = "F10",			[KEY_NUMLOCK] = "NumLock",
  	[KEY_SCROLLLOCK] = "ScrollLock",	[KEY_KP7] = "KP7",
  	[KEY_KP8] = "KP8",			[KEY_KP9] = "KP9",
  	[KEY_KPMINUS] = "KPMinus",		[KEY_KP4] = "KP4",
  	[KEY_KP5] = "KP5",			[KEY_KP6] = "KP6",
  	[KEY_KPPLUS] = "KPPlus",		[KEY_KP1] = "KP1",
  	[KEY_KP2] = "KP2",			[KEY_KP3] = "KP3",
  	[KEY_KP0] = "KP0",			[KEY_KPDOT] = "KPDot",
  	[KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
  	[KEY_F11] = "F11",			[KEY_F12] = "F12",
  	[KEY_RO] = "RO",			[KEY_KATAKANA] = "Katakana",
  	[KEY_HIRAGANA] = "HIRAGANA",		[KEY_HENKAN] = "Henkan",
  	[KEY_KATAKANAHIRAGANA] = "Katakana/Hiragana", [KEY_MUHENKAN] = "Muhenkan",
  	[KEY_KPJPCOMMA] = "KPJpComma",		[KEY_KPENTER] = "KPEnter",
  	[KEY_RIGHTCTRL] = "RightCtrl",		[KEY_KPSLASH] = "KPSlash",
  	[KEY_SYSRQ] = "SysRq",			[KEY_RIGHTALT] = "RightAlt",
  	[KEY_LINEFEED] = "LineFeed",		[KEY_HOME] = "Home",
  	[KEY_UP] = "Up",			[KEY_PAGEUP] = "PageUp",
  	[KEY_LEFT] = "Left",			[KEY_RIGHT] = "Right",
  	[KEY_END] = "End",			[KEY_DOWN] = "Down",
  	[KEY_PAGEDOWN] = "PageDown",		[KEY_INSERT] = "Insert",
  	[KEY_DELETE] = "Delete",		[KEY_MACRO] = "Macro",
  	[KEY_MUTE] = "Mute",			[KEY_VOLUMEDOWN] = "VolumeDown",
  	[KEY_VOLUMEUP] = "VolumeUp",		[KEY_POWER] = "Power",
  	[KEY_KPEQUAL] = "KPEqual",		[KEY_KPPLUSMINUS] = "KPPlusMinus",
  	[KEY_PAUSE] = "Pause",			[KEY_KPCOMMA] = "KPComma",
  	[KEY_HANGUEL] = "Hangeul",		[KEY_HANJA] = "Hanja",
  	[KEY_YEN] = "Yen",			[KEY_LEFTMETA] = "LeftMeta",
  	[KEY_RIGHTMETA] = "RightMeta",		[KEY_COMPOSE] = "Compose",
  	[KEY_STOP] = "Stop",			[KEY_AGAIN] = "Again",
  	[KEY_PROPS] = "Props",			[KEY_UNDO] = "Undo",
  	[KEY_FRONT] = "Front",			[KEY_COPY] = "Copy",
  	[KEY_OPEN] = "Open",			[KEY_PASTE] = "Paste",
  	[KEY_FIND] = "Find",			[KEY_CUT] = "Cut",
  	[KEY_HELP] = "Help",			[KEY_MENU] = "Menu",
  	[KEY_CALC] = "Calc",			[KEY_SETUP] = "Setup",
  	[KEY_SLEEP] = "Sleep",			[KEY_WAKEUP] = "WakeUp",
  	[KEY_FILE] = "File",			[KEY_SENDFILE] = "SendFile",
  	[KEY_DELETEFILE] = "DeleteFile",	[KEY_XFER] = "X-fer",
  	[KEY_PROG1] = "Prog1",			[KEY_PROG2] = "Prog2",
  	[KEY_WWW] = "WWW",			[KEY_MSDOS] = "MSDOS",

  	[KEY_COFFEE] = "Coffee",		[KEY_ROTATE_DISPLAY] = "RotateDisplay",

  	[KEY_CYCLEWINDOWS] = "CycleWindows",	[KEY_MAIL] = "Mail",
  	[KEY_BOOKMARKS] = "Bookmarks",		[KEY_COMPUTER] = "Computer",
  	[KEY_BACK] = "Back",			[KEY_FORWARD] = "Forward",
  	[KEY_CLOSECD] = "CloseCD",		[KEY_EJECTCD] = "EjectCD",
  	[KEY_EJECTCLOSECD] = "EjectCloseCD",	[KEY_NEXTSONG] = "NextSong",
  	[KEY_PLAYPAUSE] = "PlayPause",		[KEY_PREVIOUSSONG] = "PreviousSong",
  	[KEY_STOPCD] = "StopCD",		[KEY_RECORD] = "Record",
  	[KEY_REWIND] = "Rewind",		[KEY_PHONE] = "Phone",
  	[KEY_ISO] = "ISOKey",			[KEY_CONFIG] = "Config",
  	[KEY_HOMEPAGE] = "HomePage",		[KEY_REFRESH] = "Refresh",
  	[KEY_EXIT] = "Exit",			[KEY_MOVE] = "Move",
  	[KEY_EDIT] = "Edit",			[KEY_SCROLLUP] = "ScrollUp",
  	[KEY_SCROLLDOWN] = "ScrollDown",	[KEY_KPLEFTPAREN] = "KPLeftParenthesis",
  	[KEY_KPRIGHTPAREN] = "KPRightParenthesis", [KEY_NEW] = "New",
  	[KEY_REDO] = "Redo",			[KEY_F13] = "F13",
  	[KEY_F14] = "F14",			[KEY_F15] = "F15",
  	[KEY_F16] = "F16",			[KEY_F17] = "F17",
  	[KEY_F18] = "F18",			[KEY_F19] = "F19",
  	[KEY_F20] = "F20",			[KEY_F21] = "F21",
  	[KEY_F22] = "F22",			[KEY_F23] = "F23",
  	[KEY_F24] = "F24",			[KEY_PLAYCD] = "PlayCD",
  	[KEY_PAUSECD] = "PauseCD",		[KEY_PROG3] = "Prog3",
  	[KEY_PROG4] = "Prog4",			[KEY_SUSPEND] = "Suspend",
  	[KEY_CLOSE] = "Close",			[KEY_PLAY] = "Play",
  	[KEY_FASTFORWARD] = "FastForward",	[KEY_BASSBOOST] = "BassBoost",
  	[KEY_PRINT] = "Print",			[KEY_HP] = "HP",
  	[KEY_CAMERA] = "Camera",		[KEY_SOUND] = "Sound",
  	[KEY_QUESTION] = "Question",		[KEY_EMAIL] = "Email",
  	[KEY_CHAT] = "Chat",			[KEY_SEARCH] = "Search",
  	[KEY_CONNECT] = "Connect",		[KEY_FINANCE] = "Finance",
  	[KEY_SPORT] = "Sport",			[KEY_SHOP] = "Shop",
  	[KEY_ALTERASE] = "AlternateErase",	[KEY_CANCEL] = "Cancel",
  	[KEY_BRIGHTNESSDOWN] = "BrightnessDown", [KEY_BRIGHTNESSUP] = "BrightnessUp",
  	[KEY_MEDIA] = "Media",			[KEY_UNKNOWN] = "Unknown",

  	[BTN_DPAD_UP] = "BtnDPadUp",		[BTN_DPAD_DOWN] = "BtnDPadDown",
  	[BTN_DPAD_LEFT] = "BtnDPadLeft",	[BTN_DPAD_RIGHT] = "BtnDPadRight",

  	[BTN_0] = "Btn0",			[BTN_1] = "Btn1",
  	[BTN_2] = "Btn2",			[BTN_3] = "Btn3",
  	[BTN_4] = "Btn4",			[BTN_5] = "Btn5",
  	[BTN_6] = "Btn6",			[BTN_7] = "Btn7",
  	[BTN_8] = "Btn8",			[BTN_9] = "Btn9",
  	[BTN_LEFT] = "LeftBtn",			[BTN_RIGHT] = "RightBtn",
  	[BTN_MIDDLE] = "MiddleBtn",		[BTN_SIDE] = "SideBtn",
  	[BTN_EXTRA] = "ExtraBtn",		[BTN_FORWARD] = "ForwardBtn",
  	[BTN_BACK] = "BackBtn",			[BTN_TASK] = "TaskBtn",
  	[BTN_TRIGGER] = "Trigger",		[BTN_THUMB] = "ThumbBtn",
  	[BTN_THUMB2] = "ThumbBtn2",		[BTN_TOP] = "TopBtn",
  	[BTN_TOP2] = "TopBtn2",			[BTN_PINKIE] = "PinkieBtn",
  	[BTN_BASE] = "BaseBtn",			[BTN_BASE2] = "BaseBtn2",
  	[BTN_BASE3] = "BaseBtn3",		[BTN_BASE4] = "BaseBtn4",
  	[BTN_BASE5] = "BaseBtn5",		[BTN_BASE6] = "BaseBtn6",
  	[BTN_DEAD] = "BtnDead",			[BTN_A] = "BtnA",
  	[BTN_B] = "BtnB",			[BTN_C] = "BtnC",
  	[BTN_X] = "BtnX",			[BTN_Y] = "BtnY",
  	[BTN_Z] = "BtnZ",			[BTN_TL] = "BtnTL",
  	[BTN_TR] = "BtnTR",			[BTN_TL2] = "BtnTL2",
  	[BTN_TR2] = "BtnTR2",			[BTN_SELECT] = "BtnSelect",
  	[BTN_START] = "BtnStart",		[BTN_MODE] = "BtnMode",
  	[BTN_THUMBL] = "BtnThumbL",		[BTN_THUMBR] = "BtnThumbR",
  	[BTN_TOOL_PEN] = "ToolPen",		[BTN_TOOL_RUBBER] = "ToolRubber",
  	[BTN_TOOL_BRUSH] = "ToolBrush",		[BTN_TOOL_PENCIL] = "ToolPencil",
  	[BTN_TOOL_AIRBRUSH] = "ToolAirbrush",	[BTN_TOOL_FINGER] = "ToolFinger",
  	[BTN_TOOL_MOUSE] = "ToolMouse",		[BTN_TOOL_LENS] = "ToolLens",
  	[BTN_TOUCH] = "Touch",			[BTN_STYLUS] = "Stylus",
  	[BTN_STYLUS2] = "Stylus2",		[BTN_TOOL_DOUBLETAP] = "ToolDoubleTap",

  	[BTN_TOOL_TRIPLETAP] = "ToolTripleTap",	[BTN_TOOL_QUADTAP] = "ToolQuadrupleTap",
  	[BTN_GEAR_DOWN] = "WheelBtn",

  	[BTN_GEAR_UP] = "Gear up",		[KEY_OK] = "Ok",
  	[KEY_SELECT] = "Select",		[KEY_GOTO] = "Goto",
  	[KEY_CLEAR] = "Clear",			[KEY_POWER2] = "Power2",
  	[KEY_OPTION] = "Option",		[KEY_INFO] = "Info",
  	[KEY_TIME] = "Time",			[KEY_VENDOR] = "Vendor",
  	[KEY_ARCHIVE] = "Archive",		[KEY_PROGRAM] = "Program",
  	[KEY_CHANNEL] = "Channel",		[KEY_FAVORITES] = "Favorites",
  	[KEY_EPG] = "EPG",			[KEY_PVR] = "PVR",
  	[KEY_MHP] = "MHP",			[KEY_LANGUAGE] = "Language",
  	[KEY_TITLE] = "Title",			[KEY_SUBTITLE] = "Subtitle",
  	[KEY_ANGLE] = "Angle",			[KEY_ZOOM] = "Zoom",
  	[KEY_MODE] = "Mode",			[KEY_KEYBOARD] = "Keyboard",
  	[KEY_SCREEN] = "Screen",		[KEY_PC] = "PC",
  	[KEY_TV] = "TV",			[KEY_TV2] = "TV2",
  	[KEY_VCR] = "VCR",			[KEY_VCR2] = "VCR2",
  	[KEY_SAT] = "Sat",			[KEY_SAT2] = "Sat2",
  	[KEY_CD] = "CD",			[KEY_TAPE] = "Tape",
  	[KEY_RADIO] = "Radio",			[KEY_TUNER] = "Tuner",
  	[KEY_PLAYER] = "Player",		[KEY_TEXT] = "Text",
  	[KEY_DVD] = "DVD",			[KEY_AUX] = "Aux",
  	[KEY_MP3] = "MP3",			[KEY_AUDIO] = "Audio",
  	[KEY_VIDEO] = "Video",			[KEY_DIRECTORY] = "Directory",
  	[KEY_LIST] = "List",			[KEY_MEMO] = "Memo",
  	[KEY_CALENDAR] = "Calendar",		[KEY_RED] = "Red",
  	[KEY_GREEN] = "Green",			[KEY_YELLOW] = "Yellow",
  	[KEY_BLUE] = "Blue",			[KEY_CHANNELUP] = "ChannelUp",
  	[KEY_CHANNELDOWN] = "ChannelDown",	[KEY_FIRST] = "First",
  	[KEY_LAST] = "Last",			[KEY_AB] = "AB",
  	[KEY_NEXT] = "Next",			[KEY_RESTART] = "Restart",
  	[KEY_SLOW] = "Slow",			[KEY_SHUFFLE] = "Shuffle",
  	[KEY_BREAK] = "Break",			[KEY_PREVIOUS] = "Previous",
  	[KEY_DIGITS] = "Digits",		[KEY_TEEN] = "TEEN",
  	[KEY_TWEN] = "TWEN",			[KEY_DEL_EOL] = "DeleteEOL",
  	[KEY_DEL_EOS] = "DeleteEOS",		[KEY_INS_LINE] = "InsertLine",
  	[KEY_DEL_LINE] = "DeleteLine",
  	[KEY_SEND] = "Send",			[KEY_REPLY] = "Reply",
  	[KEY_FORWARDMAIL] = "ForwardMail",	[KEY_SAVE] = "Save",

  	[KEY_DOCUMENTS] = "Documents",		[KEY_SPELLCHECK] = "SpellCheck",

  	[KEY_LOGOFF] = "Logoff",

  	[KEY_FN] = "Fn",			[KEY_FN_ESC] = "Fn+ESC",
  	[KEY_FN_1] = "Fn+1",			[KEY_FN_2] = "Fn+2",
  	[KEY_FN_B] = "Fn+B",			[KEY_FN_D] = "Fn+D",
  	[KEY_FN_E] = "Fn+E",			[KEY_FN_F] = "Fn+F",
  	[KEY_FN_S] = "Fn+S",
  	[KEY_FN_F1] = "Fn+F1",			[KEY_FN_F2] = "Fn+F2",
  	[KEY_FN_F3] = "Fn+F3",			[KEY_FN_F4] = "Fn+F4",
  	[KEY_FN_F5] = "Fn+F5",			[KEY_FN_F6] = "Fn+F6",
  	[KEY_FN_F7] = "Fn+F7",			[KEY_FN_F8] = "Fn+F8",
  	[KEY_FN_F9] = "Fn+F9",			[KEY_FN_F10] = "Fn+F10",
  	[KEY_FN_F11] = "Fn+F11",		[KEY_FN_F12] = "Fn+F12",
  	[KEY_KBDILLUMTOGGLE] = "KbdIlluminationToggle",
  	[KEY_KBDILLUMDOWN] = "KbdIlluminationDown",
  	[KEY_KBDILLUMUP] = "KbdIlluminationUp",
  	[KEY_SWITCHVIDEOMODE] = "SwitchVideoMode",

  	[KEY_BUTTONCONFIG] = "ButtonConfig",
  	[KEY_TASKMANAGER] = "TaskManager",
  	[KEY_JOURNAL] = "Journal",
  	[KEY_CONTROLPANEL] = "ControlPanel",
  	[KEY_APPSELECT] = "AppSelect",
  	[KEY_SCREENSAVER] = "ScreenSaver",
  	[KEY_VOICECOMMAND] = "VoiceCommand",
  	[KEY_BRIGHTNESS_MIN] = "BrightnessMin",
  	[KEY_BRIGHTNESS_MAX] = "BrightnessMax",
  	[KEY_BRIGHTNESS_AUTO] = "BrightnessAuto",

  	[KEY_KBDINPUTASSIST_PREV] = "KbdInputAssistPrev",
  	[KEY_KBDINPUTASSIST_NEXT] = "KbdInputAssistNext",
  	[KEY_KBDINPUTASSIST_PREVGROUP] = "KbdInputAssistPrevGroup",
  	[KEY_KBDINPUTASSIST_NEXTGROUP] = "KbdInputAssistNextGroup",
  	[KEY_KBDINPUTASSIST_ACCEPT] = "KbdInputAssistAccept",
  	[KEY_KBDINPUTASSIST_CANCEL] = "KbdInputAssistCancel",

  };

  static const char *relatives[REL_MAX + 1] = {

  	[REL_X] = "X",			[REL_Y] = "Y",
  	[REL_Z] = "Z",			[REL_RX] = "Rx",
  	[REL_RY] = "Ry",		[REL_RZ] = "Rz",
  	[REL_HWHEEL] = "HWheel",	[REL_DIAL] = "Dial",
  	[REL_WHEEL] = "Wheel",		[REL_MISC] = "Misc",
  };

  static const char *absolutes[ABS_CNT] = {

  	[ABS_X] = "X",			[ABS_Y] = "Y",
  	[ABS_Z] = "Z",			[ABS_RX] = "Rx",
  	[ABS_RY] = "Ry",		[ABS_RZ] = "Rz",
  	[ABS_THROTTLE] = "Throttle",	[ABS_RUDDER] = "Rudder",
  	[ABS_WHEEL] = "Wheel",		[ABS_GAS] = "Gas",
  	[ABS_BRAKE] = "Brake",		[ABS_HAT0X] = "Hat0X",
  	[ABS_HAT0Y] = "Hat0Y",		[ABS_HAT1X] = "Hat1X",
  	[ABS_HAT1Y] = "Hat1Y",		[ABS_HAT2X] = "Hat2X",
  	[ABS_HAT2Y] = "Hat2Y",		[ABS_HAT3X] = "Hat3X",
  	[ABS_HAT3Y] = "Hat 3Y",		[ABS_PRESSURE] = "Pressure",
  	[ABS_DISTANCE] = "Distance",	[ABS_TILT_X] = "XTilt",

  	[ABS_TILT_Y] = "YTilt",		[ABS_TOOL_WIDTH] = "ToolWidth",

  	[ABS_VOLUME] = "Volume",	[ABS_MISC] = "Misc",

  	[ABS_MT_TOUCH_MAJOR] = "MTMajor",
  	[ABS_MT_TOUCH_MINOR] = "MTMinor",
  	[ABS_MT_WIDTH_MAJOR] = "MTMajorW",
  	[ABS_MT_WIDTH_MINOR] = "MTMinorW",
  	[ABS_MT_ORIENTATION] = "MTOrientation",
  	[ABS_MT_POSITION_X] = "MTPositionX",
  	[ABS_MT_POSITION_Y] = "MTPositionY",
  	[ABS_MT_TOOL_TYPE] = "MTToolType",
  	[ABS_MT_BLOB_ID] = "MTBlobID",

  };

  static const char *misc[MSC_MAX + 1] = {

  	[MSC_SERIAL] = "Serial",	[MSC_PULSELED] = "Pulseled",
  	[MSC_GESTURE] = "Gesture",	[MSC_RAW] = "RawData"
  };

  static const char *leds[LED_MAX + 1] = {

  	[LED_NUML] = "NumLock",		[LED_CAPSL] = "CapsLock",
  	[LED_SCROLLL] = "ScrollLock",	[LED_COMPOSE] = "Compose",
  	[LED_KANA] = "Kana",		[LED_SLEEP] = "Sleep",
  	[LED_SUSPEND] = "Suspend",	[LED_MUTE] = "Mute",
  	[LED_MISC] = "Misc",
  };

  static const char *repeats[REP_MAX + 1] = {

  	[REP_DELAY] = "Delay",		[REP_PERIOD] = "Period"
  };

  static const char *sounds[SND_MAX + 1] = {

  	[SND_CLICK] = "Click",		[SND_BELL] = "Bell",
  	[SND_TONE] = "Tone"
  };

  static const char **names[EV_MAX + 1] = {

  	[EV_SYN] = syncs,			[EV_KEY] = keys,
  	[EV_REL] = relatives,			[EV_ABS] = absolutes,
  	[EV_MSC] = misc,			[EV_LED] = leds,
  	[EV_SND] = sounds,			[EV_REP] = repeats,
  };

  static void hid_resolv_event(__u8 type, __u16 code, struct seq_file *f)
  {

  	seq_printf(f, "%s.%s", events[type] ? events[type] : "?",

  		names[type] ? (names[type][code] ? names[type][code] : "?") : "?");
  }

  static void hid_dump_input_mapping(struct hid_device *hid, struct seq_file *f)

  {
  	int i, j, k;
  	struct hid_report *report;
  	struct hid_usage *usage;
  
  	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
  		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
  			for (i = 0; i < report->maxfield; i++) {
  				for ( j = 0; j < report->field[i]->maxusage; j++) {
  					usage = report->field[i]->usage + j;
  					hid_resolv_usage(usage->hid, f);
  					seq_printf(f, " ---> ");
  					hid_resolv_event(usage->type, usage->code, f);
  					seq_printf(f, "
  ");
  				}
  			}
  		}
  	}
  
  }
  
  static int hid_debug_rdesc_show(struct seq_file *f, void *p)
  {
  	struct hid_device *hdev = f->private;

  	const __u8 *rdesc = hdev->rdesc;
  	unsigned rsize = hdev->rsize;

  	int i;

  	if (!rdesc) {
  		rdesc = hdev->dev_rdesc;
  		rsize = hdev->dev_rsize;
  	}

  	/* dump HID report descriptor */

  	for (i = 0; i < rsize; i++)
  		seq_printf(f, "%02x ", rdesc[i]);

  	seq_printf(f, "
  
  ");
  
  	/* dump parsed data and input mappings */

  	if (down_interruptible(&hdev->driver_input_lock))
  		return 0;

  	hid_dump_device(hdev, f);
  	seq_printf(f, "
  ");
  	hid_dump_input_mapping(hdev, f);

  	up(&hdev->driver_input_lock);

  	return 0;
  }

  static int hid_debug_events_open(struct inode *inode, struct file *file)
  {
  	int err = 0;
  	struct hid_debug_list *list;

  	unsigned long flags;

  
  	if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) {
  		err = -ENOMEM;
  		goto out;
  	}

  	err = kfifo_alloc(&list->hid_debug_fifo, HID_DEBUG_FIFOSIZE, GFP_KERNEL);
  	if (err) {

  		kfree(list);

  		goto out;
  	}
  	list->hdev = (struct hid_device *) inode->i_private;
  	file->private_data = list;
  	mutex_init(&list->read_mutex);

  	spin_lock_irqsave(&list->hdev->debug_list_lock, flags);

  	list_add_tail(&list->node, &list->hdev->debug_list);

  	spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags);

  
  out:
  	return err;
  }
  
  static ssize_t hid_debug_events_read(struct file *file, char __user *buffer,
  		size_t count, loff_t *ppos)
  {
  	struct hid_debug_list *list = file->private_data;

  	int ret = 0, copied;

  	DECLARE_WAITQUEUE(wait, current);

  	mutex_lock(&list->read_mutex);

  	if (kfifo_is_empty(&list->hid_debug_fifo)) {
  		add_wait_queue(&list->hdev->debug_wait, &wait);
  		set_current_state(TASK_INTERRUPTIBLE);
  
  		while (kfifo_is_empty(&list->hid_debug_fifo)) {
  			if (file->f_flags & O_NONBLOCK) {
  				ret = -EAGAIN;
  				break;
  			}

  			if (signal_pending(current)) {
  				ret = -ERESTARTSYS;
  				break;
  			}

  			/* if list->hdev is NULL we cannot remove_wait_queue().
  			 * if list->hdev->debug is 0 then hid_debug_unregister()
  			 * was already called and list->hdev is being destroyed.
  			 * if we add remove_wait_queue() here we can hit a race.
  			 */
  			if (!list->hdev || !list->hdev->debug) {
  				ret = -EIO;
  				set_current_state(TASK_RUNNING);
  				goto out;

  			}

  			/* allow O_NONBLOCK from other threads */
  			mutex_unlock(&list->read_mutex);
  			schedule();
  			mutex_lock(&list->read_mutex);
  			set_current_state(TASK_INTERRUPTIBLE);

  		}

  		__set_current_state(TASK_RUNNING);
  		remove_wait_queue(&list->hdev->debug_wait, &wait);

  		if (ret)

  			goto out;

  	}

  
  	/* pass the fifo content to userspace, locking is not needed with only
  	 * one concurrent reader and one concurrent writer
  	 */
  	ret = kfifo_to_user(&list->hid_debug_fifo, buffer, count, &copied);
  	if (ret)
  		goto out;
  	ret = copied;

  out:
  	mutex_unlock(&list->read_mutex);
  	return ret;
  }

  static __poll_t hid_debug_events_poll(struct file *file, poll_table *wait)

  {
  	struct hid_debug_list *list = file->private_data;
  
  	poll_wait(file, &list->hdev->debug_wait, wait);

  	if (!kfifo_is_empty(&list->hid_debug_fifo))

  		return EPOLLIN | EPOLLRDNORM;

  	if (!list->hdev->debug)

  		return EPOLLERR | EPOLLHUP;

  	return 0;
  }
  
  static int hid_debug_events_release(struct inode *inode, struct file *file)
  {
  	struct hid_debug_list *list = file->private_data;

  	unsigned long flags;

  	spin_lock_irqsave(&list->hdev->debug_list_lock, flags);

  	list_del(&list->node);

  	spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags);

  	kfifo_free(&list->hid_debug_fifo);

  	kfree(list);
  
  	return 0;
  }

  DEFINE_SHOW_ATTRIBUTE(hid_debug_rdesc);

  static const struct file_operations hid_debug_events_fops = {
  	.owner =        THIS_MODULE,
  	.open           = hid_debug_events_open,
  	.read           = hid_debug_events_read,
  	.poll		= hid_debug_events_poll,
  	.release        = hid_debug_events_release,

  	.llseek		= noop_llseek,

  };

  void hid_debug_register(struct hid_device *hdev, const char *name)
  {
  	hdev->debug_dir = debugfs_create_dir(name, hid_debug_root);
  	hdev->debug_rdesc = debugfs_create_file("rdesc", 0400,
  			hdev->debug_dir, hdev, &hid_debug_rdesc_fops);

  	hdev->debug_events = debugfs_create_file("events", 0400,
  			hdev->debug_dir, hdev, &hid_debug_events_fops);
  	hdev->debug = 1;

  }
  
  void hid_debug_unregister(struct hid_device *hdev)
  {

  	hdev->debug = 0;
  	wake_up_interruptible(&hdev->debug_wait);

  	debugfs_remove(hdev->debug_rdesc);

  	debugfs_remove(hdev->debug_events);

  	debugfs_remove(hdev->debug_dir);
  }
  
  void hid_debug_init(void)
  {
  	hid_debug_root = debugfs_create_dir("hid", NULL);
  }
  
  void hid_debug_exit(void)
  {
  	debugfs_remove_recursive(hid_debug_root);
  }