LCOV - code coverage report
Current view: top level - drivers/hid - hid-debug.c (source / functions) Hit Total Coverage
Test: Real Lines: 47 239 19.7 %
Date: 2020-10-17 15:46:43 Functions: 0 19 0.0 %
Legend: Neither, QEMU, Real, Both Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : // SPDX-License-Identifier: GPL-2.0-or-later
       2                 :            : /*
       3                 :            :  *  (c) 1999 Andreas Gal                <gal@cs.uni-magdeburg.de>
       4                 :            :  *  (c) 2000-2001 Vojtech Pavlik        <vojtech@ucw.cz>
       5                 :            :  *  (c) 2007-2009 Jiri Kosina
       6                 :            :  *
       7                 :            :  *  HID debugging support
       8                 :            :  */
       9                 :            : 
      10                 :            : /*
      11                 :            :  *
      12                 :            :  * Should you need to contact me, the author, you can do so either by
      13                 :            :  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
      14                 :            :  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
      15                 :            :  */
      16                 :            : 
      17                 :            : #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
      18                 :            : 
      19                 :            : #include <linux/debugfs.h>
      20                 :            : #include <linux/seq_file.h>
      21                 :            : #include <linux/kfifo.h>
      22                 :            : #include <linux/sched/signal.h>
      23                 :            : #include <linux/export.h>
      24                 :            : #include <linux/slab.h>
      25                 :            : #include <linux/uaccess.h>
      26                 :            : #include <linux/poll.h>
      27                 :            : 
      28                 :            : #include <linux/hid.h>
      29                 :            : #include <linux/hid-debug.h>
      30                 :            : 
      31                 :            : static struct dentry *hid_debug_root;
      32                 :            : 
      33                 :            : struct hid_usage_entry {
      34                 :            :         unsigned  page;
      35                 :            :         unsigned  usage;
      36                 :            :         const char     *description;
      37                 :            : };
      38                 :            : 
      39                 :            : static const struct hid_usage_entry hid_usage_table[] = {
      40                 :            :   {  0,      0, "Undefined" },
      41                 :            :   {  1,      0, "GenericDesktop" },
      42                 :            :     {0, 0x01, "Pointer"},
      43                 :            :     {0, 0x02, "Mouse"},
      44                 :            :     {0, 0x04, "Joystick"},
      45                 :            :     {0, 0x05, "GamePad"},
      46                 :            :     {0, 0x06, "Keyboard"},
      47                 :            :     {0, 0x07, "Keypad"},
      48                 :            :     {0, 0x08, "MultiAxis"},
      49                 :            :       {0, 0x30, "X"},
      50                 :            :       {0, 0x31, "Y"},
      51                 :            :       {0, 0x32, "Z"},
      52                 :            :       {0, 0x33, "Rx"},
      53                 :            :       {0, 0x34, "Ry"},
      54                 :            :       {0, 0x35, "Rz"},
      55                 :            :       {0, 0x36, "Slider"},
      56                 :            :       {0, 0x37, "Dial"},
      57                 :            :       {0, 0x38, "Wheel"},
      58                 :            :       {0, 0x39, "HatSwitch"},
      59                 :            :     {0, 0x3a, "CountedBuffer"},
      60                 :            :       {0, 0x3b, "ByteCount"},
      61                 :            :       {0, 0x3c, "MotionWakeup"},
      62                 :            :       {0, 0x3d, "Start"},
      63                 :            :       {0, 0x3e, "Select"},
      64                 :            :       {0, 0x40, "Vx"},
      65                 :            :       {0, 0x41, "Vy"},
      66                 :            :       {0, 0x42, "Vz"},
      67                 :            :       {0, 0x43, "Vbrx"},
      68                 :            :       {0, 0x44, "Vbry"},
      69                 :            :       {0, 0x45, "Vbrz"},
      70                 :            :       {0, 0x46, "Vno"},
      71                 :            :     {0, 0x80, "SystemControl"},
      72                 :            :       {0, 0x81, "SystemPowerDown"},
      73                 :            :       {0, 0x82, "SystemSleep"},
      74                 :            :       {0, 0x83, "SystemWakeUp"},
      75                 :            :       {0, 0x84, "SystemContextMenu"},
      76                 :            :       {0, 0x85, "SystemMainMenu"},
      77                 :            :       {0, 0x86, "SystemAppMenu"},
      78                 :            :       {0, 0x87, "SystemMenuHelp"},
      79                 :            :       {0, 0x88, "SystemMenuExit"},
      80                 :            :       {0, 0x89, "SystemMenuSelect"},
      81                 :            :       {0, 0x8a, "SystemMenuRight"},
      82                 :            :       {0, 0x8b, "SystemMenuLeft"},
      83                 :            :       {0, 0x8c, "SystemMenuUp"},
      84                 :            :       {0, 0x8d, "SystemMenuDown"},
      85                 :            :       {0, 0x90, "D-PadUp"},
      86                 :            :       {0, 0x91, "D-PadDown"},
      87                 :            :       {0, 0x92, "D-PadRight"},
      88                 :            :       {0, 0x93, "D-PadLeft"},
      89                 :            :   {  2, 0, "Simulation" },
      90                 :            :       {0, 0xb0, "Aileron"},
      91                 :            :       {0, 0xb1, "AileronTrim"},
      92                 :            :       {0, 0xb2, "Anti-Torque"},
      93                 :            :       {0, 0xb3, "Autopilot"},
      94                 :            :       {0, 0xb4, "Chaff"},
      95                 :            :       {0, 0xb5, "Collective"},
      96                 :            :       {0, 0xb6, "DiveBrake"},
      97                 :            :       {0, 0xb7, "ElectronicCountermeasures"},
      98                 :            :       {0, 0xb8, "Elevator"},
      99                 :            :       {0, 0xb9, "ElevatorTrim"},
     100                 :            :       {0, 0xba, "Rudder"},
     101                 :            :       {0, 0xbb, "Throttle"},
     102                 :            :       {0, 0xbc, "FlightCommunications"},
     103                 :            :       {0, 0xbd, "FlareRelease"},
     104                 :            :       {0, 0xbe, "LandingGear"},
     105                 :            :       {0, 0xbf, "ToeBrake"},
     106                 :            :   {  6, 0, "GenericDeviceControls" },
     107                 :            :       {0, 0x20, "BatteryStrength" },
     108                 :            :       {0, 0x21, "WirelessChannel" },
     109                 :            :       {0, 0x22, "WirelessID" },
     110                 :            :       {0, 0x23, "DiscoverWirelessControl" },
     111                 :            :       {0, 0x24, "SecurityCodeCharacterEntered" },
     112                 :            :       {0, 0x25, "SecurityCodeCharactedErased" },
     113                 :            :       {0, 0x26, "SecurityCodeCleared" },
     114                 :            :   {  7, 0, "Keyboard" },
     115                 :            :   {  8, 0, "LED" },
     116                 :            :       {0, 0x01, "NumLock"},
     117                 :            :       {0, 0x02, "CapsLock"},
     118                 :            :       {0, 0x03, "ScrollLock"},
     119                 :            :       {0, 0x04, "Compose"},
     120                 :            :       {0, 0x05, "Kana"},
     121                 :            :       {0, 0x4b, "GenericIndicator"},
     122                 :            :   {  9, 0, "Button" },
     123                 :            :   { 10, 0, "Ordinal" },
     124                 :            :   { 12, 0, "Consumer" },
     125                 :            :       {0, 0x238, "HorizontalWheel"},
     126                 :            :   { 13, 0, "Digitizers" },
     127                 :            :     {0, 0x01, "Digitizer"},
     128                 :            :     {0, 0x02, "Pen"},
     129                 :            :     {0, 0x03, "LightPen"},
     130                 :            :     {0, 0x04, "TouchScreen"},
     131                 :            :     {0, 0x05, "TouchPad"},
     132                 :            :     {0, 0x0e, "DeviceConfiguration"},
     133                 :            :     {0, 0x20, "Stylus"},
     134                 :            :     {0, 0x21, "Puck"},
     135                 :            :     {0, 0x22, "Finger"},
     136                 :            :     {0, 0x23, "DeviceSettings"},
     137                 :            :     {0, 0x30, "TipPressure"},
     138                 :            :     {0, 0x31, "BarrelPressure"},
     139                 :            :     {0, 0x32, "InRange"},
     140                 :            :     {0, 0x33, "Touch"},
     141                 :            :     {0, 0x34, "UnTouch"},
     142                 :            :     {0, 0x35, "Tap"},
     143                 :            :     {0, 0x39, "TabletFunctionKey"},
     144                 :            :     {0, 0x3a, "ProgramChangeKey"},
     145                 :            :     {0, 0x3c, "Invert"},
     146                 :            :     {0, 0x42, "TipSwitch"},
     147                 :            :     {0, 0x43, "SecondaryTipSwitch"},
     148                 :            :     {0, 0x44, "BarrelSwitch"},
     149                 :            :     {0, 0x45, "Eraser"},
     150                 :            :     {0, 0x46, "TabletPick"},
     151                 :            :     {0, 0x47, "Confidence"},
     152                 :            :     {0, 0x48, "Width"},
     153                 :            :     {0, 0x49, "Height"},
     154                 :            :     {0, 0x51, "ContactID"},
     155                 :            :     {0, 0x52, "InputMode"},
     156                 :            :     {0, 0x53, "DeviceIndex"},
     157                 :            :     {0, 0x54, "ContactCount"},
     158                 :            :     {0, 0x55, "ContactMaximumNumber"},
     159                 :            :     {0, 0x59, "ButtonType"},
     160                 :            :     {0, 0x5A, "SecondaryBarrelSwitch"},
     161                 :            :     {0, 0x5B, "TransducerSerialNumber"},
     162                 :            :   { 15, 0, "PhysicalInterfaceDevice" },
     163                 :            :     {0, 0x00, "Undefined"},
     164                 :            :     {0, 0x01, "Physical_Interface_Device"},
     165                 :            :       {0, 0x20, "Normal"},
     166                 :            :     {0, 0x21, "Set_Effect_Report"},
     167                 :            :       {0, 0x22, "Effect_Block_Index"},
     168                 :            :       {0, 0x23, "Parameter_Block_Offset"},
     169                 :            :       {0, 0x24, "ROM_Flag"},
     170                 :            :       {0, 0x25, "Effect_Type"},
     171                 :            :         {0, 0x26, "ET_Constant_Force"},
     172                 :            :         {0, 0x27, "ET_Ramp"},
     173                 :            :         {0, 0x28, "ET_Custom_Force_Data"},
     174                 :            :         {0, 0x30, "ET_Square"},
     175                 :            :         {0, 0x31, "ET_Sine"},
     176                 :            :         {0, 0x32, "ET_Triangle"},
     177                 :            :         {0, 0x33, "ET_Sawtooth_Up"},
     178                 :            :         {0, 0x34, "ET_Sawtooth_Down"},
     179                 :            :         {0, 0x40, "ET_Spring"},
     180                 :            :         {0, 0x41, "ET_Damper"},
     181                 :            :         {0, 0x42, "ET_Inertia"},
     182                 :            :         {0, 0x43, "ET_Friction"},
     183                 :            :       {0, 0x50, "Duration"},
     184                 :            :       {0, 0x51, "Sample_Period"},
     185                 :            :       {0, 0x52, "Gain"},
     186                 :            :       {0, 0x53, "Trigger_Button"},
     187                 :            :       {0, 0x54, "Trigger_Repeat_Interval"},
     188                 :            :       {0, 0x55, "Axes_Enable"},
     189                 :            :         {0, 0x56, "Direction_Enable"},
     190                 :            :       {0, 0x57, "Direction"},
     191                 :            :       {0, 0x58, "Type_Specific_Block_Offset"},
     192                 :            :         {0, 0x59, "Block_Type"},
     193                 :            :         {0, 0x5A, "Set_Envelope_Report"},
     194                 :            :           {0, 0x5B, "Attack_Level"},
     195                 :            :           {0, 0x5C, "Attack_Time"},
     196                 :            :           {0, 0x5D, "Fade_Level"},
     197                 :            :           {0, 0x5E, "Fade_Time"},
     198                 :            :         {0, 0x5F, "Set_Condition_Report"},
     199                 :            :         {0, 0x60, "CP_Offset"},
     200                 :            :         {0, 0x61, "Positive_Coefficient"},
     201                 :            :         {0, 0x62, "Negative_Coefficient"},
     202                 :            :         {0, 0x63, "Positive_Saturation"},
     203                 :            :         {0, 0x64, "Negative_Saturation"},
     204                 :            :         {0, 0x65, "Dead_Band"},
     205                 :            :       {0, 0x66, "Download_Force_Sample"},
     206                 :            :       {0, 0x67, "Isoch_Custom_Force_Enable"},
     207                 :            :       {0, 0x68, "Custom_Force_Data_Report"},
     208                 :            :         {0, 0x69, "Custom_Force_Data"},
     209                 :            :         {0, 0x6A, "Custom_Force_Vendor_Defined_Data"},
     210                 :            :       {0, 0x6B, "Set_Custom_Force_Report"},
     211                 :            :         {0, 0x6C, "Custom_Force_Data_Offset"},
     212                 :            :         {0, 0x6D, "Sample_Count"},
     213                 :            :       {0, 0x6E, "Set_Periodic_Report"},
     214                 :            :         {0, 0x6F, "Offset"},
     215                 :            :         {0, 0x70, "Magnitude"},
     216                 :            :         {0, 0x71, "Phase"},
     217                 :            :         {0, 0x72, "Period"},
     218                 :            :       {0, 0x73, "Set_Constant_Force_Report"},
     219                 :            :         {0, 0x74, "Set_Ramp_Force_Report"},
     220                 :            :         {0, 0x75, "Ramp_Start"},
     221                 :            :         {0, 0x76, "Ramp_End"},
     222                 :            :       {0, 0x77, "Effect_Operation_Report"},
     223                 :            :         {0, 0x78, "Effect_Operation"},
     224                 :            :           {0, 0x79, "Op_Effect_Start"},
     225                 :            :           {0, 0x7A, "Op_Effect_Start_Solo"},
     226                 :            :           {0, 0x7B, "Op_Effect_Stop"},
     227                 :            :           {0, 0x7C, "Loop_Count"},
     228                 :            :       {0, 0x7D, "Device_Gain_Report"},
     229                 :            :         {0, 0x7E, "Device_Gain"},
     230                 :            :     {0, 0x7F, "PID_Pool_Report"},
     231                 :            :       {0, 0x80, "RAM_Pool_Size"},
     232                 :            :       {0, 0x81, "ROM_Pool_Size"},
     233                 :            :       {0, 0x82, "ROM_Effect_Block_Count"},
     234                 :            :       {0, 0x83, "Simultaneous_Effects_Max"},
     235                 :            :       {0, 0x84, "Pool_Alignment"},
     236                 :            :     {0, 0x85, "PID_Pool_Move_Report"},
     237                 :            :       {0, 0x86, "Move_Source"},
     238                 :            :       {0, 0x87, "Move_Destination"},
     239                 :            :       {0, 0x88, "Move_Length"},
     240                 :            :     {0, 0x89, "PID_Block_Load_Report"},
     241                 :            :       {0, 0x8B, "Block_Load_Status"},
     242                 :            :       {0, 0x8C, "Block_Load_Success"},
     243                 :            :       {0, 0x8D, "Block_Load_Full"},
     244                 :            :       {0, 0x8E, "Block_Load_Error"},
     245                 :            :       {0, 0x8F, "Block_Handle"},
     246                 :            :       {0, 0x90, "PID_Block_Free_Report"},
     247                 :            :       {0, 0x91, "Type_Specific_Block_Handle"},
     248                 :            :     {0, 0x92, "PID_State_Report"},
     249                 :            :       {0, 0x94, "Effect_Playing"},
     250                 :            :       {0, 0x95, "PID_Device_Control_Report"},
     251                 :            :         {0, 0x96, "PID_Device_Control"},
     252                 :            :         {0, 0x97, "DC_Enable_Actuators"},
     253                 :            :         {0, 0x98, "DC_Disable_Actuators"},
     254                 :            :         {0, 0x99, "DC_Stop_All_Effects"},
     255                 :            :         {0, 0x9A, "DC_Device_Reset"},
     256                 :            :         {0, 0x9B, "DC_Device_Pause"},
     257                 :            :         {0, 0x9C, "DC_Device_Continue"},
     258                 :            :       {0, 0x9F, "Device_Paused"},
     259                 :            :       {0, 0xA0, "Actuators_Enabled"},
     260                 :            :       {0, 0xA4, "Safety_Switch"},
     261                 :            :       {0, 0xA5, "Actuator_Override_Switch"},
     262                 :            :       {0, 0xA6, "Actuator_Power"},
     263                 :            :     {0, 0xA7, "Start_Delay"},
     264                 :            :     {0, 0xA8, "Parameter_Block_Size"},
     265                 :            :     {0, 0xA9, "Device_Managed_Pool"},
     266                 :            :     {0, 0xAA, "Shared_Parameter_Blocks"},
     267                 :            :     {0, 0xAB, "Create_New_Effect_Report"},
     268                 :            :     {0, 0xAC, "RAM_Pool_Available"},
     269                 :            :   {  0x20, 0, "Sensor" },
     270                 :            :     { 0x20, 0x01, "Sensor" },
     271                 :            :     { 0x20, 0x10, "Biometric" },
     272                 :            :       { 0x20, 0x11, "BiometricHumanPresence" },
     273                 :            :       { 0x20, 0x12, "BiometricHumanProximity" },
     274                 :            :       { 0x20, 0x13, "BiometricHumanTouch" },
     275                 :            :     { 0x20, 0x20, "Electrical" },
     276                 :            :       { 0x20, 0x21, "ElectricalCapacitance" },
     277                 :            :       { 0x20, 0x22, "ElectricalCurrent" },
     278                 :            :       { 0x20, 0x23, "ElectricalPower" },
     279                 :            :       { 0x20, 0x24, "ElectricalInductance" },
     280                 :            :       { 0x20, 0x25, "ElectricalResistance" },
     281                 :            :       { 0x20, 0x26, "ElectricalVoltage" },
     282                 :            :       { 0x20, 0x27, "ElectricalPoteniometer" },
     283                 :            :       { 0x20, 0x28, "ElectricalFrequency" },
     284                 :            :       { 0x20, 0x29, "ElectricalPeriod" },
     285                 :            :     { 0x20, 0x30, "Environmental" },
     286                 :            :       { 0x20, 0x31, "EnvironmentalAtmosphericPressure" },
     287                 :            :       { 0x20, 0x32, "EnvironmentalHumidity" },
     288                 :            :       { 0x20, 0x33, "EnvironmentalTemperature" },
     289                 :            :       { 0x20, 0x34, "EnvironmentalWindDirection" },
     290                 :            :       { 0x20, 0x35, "EnvironmentalWindSpeed" },
     291                 :            :     { 0x20, 0x40, "Light" },
     292                 :            :       { 0x20, 0x41, "LightAmbientLight" },
     293                 :            :       { 0x20, 0x42, "LightConsumerInfrared" },
     294                 :            :     { 0x20, 0x50, "Location" },
     295                 :            :       { 0x20, 0x51, "LocationBroadcast" },
     296                 :            :       { 0x20, 0x52, "LocationDeadReckoning" },
     297                 :            :       { 0x20, 0x53, "LocationGPS" },
     298                 :            :       { 0x20, 0x54, "LocationLookup" },
     299                 :            :       { 0x20, 0x55, "LocationOther" },
     300                 :            :       { 0x20, 0x56, "LocationStatic" },
     301                 :            :       { 0x20, 0x57, "LocationTriangulation" },
     302                 :            :     { 0x20, 0x60, "Mechanical" },
     303                 :            :       { 0x20, 0x61, "MechanicalBooleanSwitch" },
     304                 :            :       { 0x20, 0x62, "MechanicalBooleanSwitchArray" },
     305                 :            :       { 0x20, 0x63, "MechanicalMultivalueSwitch" },
     306                 :            :       { 0x20, 0x64, "MechanicalForce" },
     307                 :            :       { 0x20, 0x65, "MechanicalPressure" },
     308                 :            :       { 0x20, 0x66, "MechanicalStrain" },
     309                 :            :       { 0x20, 0x67, "MechanicalWeight" },
     310                 :            :       { 0x20, 0x68, "MechanicalHapticVibrator" },
     311                 :            :       { 0x20, 0x69, "MechanicalHallEffectSwitch" },
     312                 :            :     { 0x20, 0x70, "Motion" },
     313                 :            :       { 0x20, 0x71, "MotionAccelerometer1D" },
     314                 :            :       { 0x20, 0x72, "MotionAccelerometer2D" },
     315                 :            :       { 0x20, 0x73, "MotionAccelerometer3D" },
     316                 :            :       { 0x20, 0x74, "MotionGyrometer1D" },
     317                 :            :       { 0x20, 0x75, "MotionGyrometer2D" },
     318                 :            :       { 0x20, 0x76, "MotionGyrometer3D" },
     319                 :            :       { 0x20, 0x77, "MotionMotionDetector" },
     320                 :            :       { 0x20, 0x78, "MotionSpeedometer" },
     321                 :            :       { 0x20, 0x79, "MotionAccelerometer" },
     322                 :            :       { 0x20, 0x7A, "MotionGyrometer" },
     323                 :            :     { 0x20, 0x80, "Orientation" },
     324                 :            :       { 0x20, 0x81, "OrientationCompass1D" },
     325                 :            :       { 0x20, 0x82, "OrientationCompass2D" },
     326                 :            :       { 0x20, 0x83, "OrientationCompass3D" },
     327                 :            :       { 0x20, 0x84, "OrientationInclinometer1D" },
     328                 :            :       { 0x20, 0x85, "OrientationInclinometer2D" },
     329                 :            :       { 0x20, 0x86, "OrientationInclinometer3D" },
     330                 :            :       { 0x20, 0x87, "OrientationDistance1D" },
     331                 :            :       { 0x20, 0x88, "OrientationDistance2D" },
     332                 :            :       { 0x20, 0x89, "OrientationDistance3D" },
     333                 :            :       { 0x20, 0x8A, "OrientationDeviceOrientation" },
     334                 :            :       { 0x20, 0x8B, "OrientationCompass" },
     335                 :            :       { 0x20, 0x8C, "OrientationInclinometer" },
     336                 :            :       { 0x20, 0x8D, "OrientationDistance" },
     337                 :            :     { 0x20, 0x90, "Scanner" },
     338                 :            :       { 0x20, 0x91, "ScannerBarcode" },
     339                 :            :       { 0x20, 0x91, "ScannerRFID" },
     340                 :            :       { 0x20, 0x91, "ScannerNFC" },
     341                 :            :     { 0x20, 0xA0, "Time" },
     342                 :            :       { 0x20, 0xA1, "TimeAlarmTimer" },
     343                 :            :       { 0x20, 0xA2, "TimeRealTimeClock" },
     344                 :            :     { 0x20, 0xE0, "Other" },
     345                 :            :       { 0x20, 0xE1, "OtherCustom" },
     346                 :            :       { 0x20, 0xE2, "OtherGeneric" },
     347                 :            :       { 0x20, 0xE3, "OtherGenericEnumerator" },
     348                 :            :   { 0x84, 0, "Power Device" },
     349                 :            :     { 0x84, 0x02, "PresentStatus" },
     350                 :            :     { 0x84, 0x03, "ChangeStatus" },
     351                 :            :     { 0x84, 0x04, "UPS" },
     352                 :            :     { 0x84, 0x05, "PowerSupply" },
     353                 :            :     { 0x84, 0x10, "BatterySystem" },
     354                 :            :     { 0x84, 0x11, "BatterySystemID" },
     355                 :            :     { 0x84, 0x12, "Battery" },
     356                 :            :     { 0x84, 0x13, "BatteryID" },
     357                 :            :     { 0x84, 0x14, "Charger" },
     358                 :            :     { 0x84, 0x15, "ChargerID" },
     359                 :            :     { 0x84, 0x16, "PowerConverter" },
     360                 :            :     { 0x84, 0x17, "PowerConverterID" },
     361                 :            :     { 0x84, 0x18, "OutletSystem" },
     362                 :            :     { 0x84, 0x19, "OutletSystemID" },
     363                 :            :     { 0x84, 0x1a, "Input" },
     364                 :            :     { 0x84, 0x1b, "InputID" },
     365                 :            :     { 0x84, 0x1c, "Output" },
     366                 :            :     { 0x84, 0x1d, "OutputID" },
     367                 :            :     { 0x84, 0x1e, "Flow" },
     368                 :            :     { 0x84, 0x1f, "FlowID" },
     369                 :            :     { 0x84, 0x20, "Outlet" },
     370                 :            :     { 0x84, 0x21, "OutletID" },
     371                 :            :     { 0x84, 0x22, "Gang" },
     372                 :            :     { 0x84, 0x24, "PowerSummary" },
     373                 :            :     { 0x84, 0x25, "PowerSummaryID" },
     374                 :            :     { 0x84, 0x30, "Voltage" },
     375                 :            :     { 0x84, 0x31, "Current" },
     376                 :            :     { 0x84, 0x32, "Frequency" },
     377                 :            :     { 0x84, 0x33, "ApparentPower" },
     378                 :            :     { 0x84, 0x35, "PercentLoad" },
     379                 :            :     { 0x84, 0x40, "ConfigVoltage" },
     380                 :            :     { 0x84, 0x41, "ConfigCurrent" },
     381                 :            :     { 0x84, 0x43, "ConfigApparentPower" },
     382                 :            :     { 0x84, 0x53, "LowVoltageTransfer" },
     383                 :            :     { 0x84, 0x54, "HighVoltageTransfer" },
     384                 :            :     { 0x84, 0x56, "DelayBeforeStartup" },
     385                 :            :     { 0x84, 0x57, "DelayBeforeShutdown" },
     386                 :            :     { 0x84, 0x58, "Test" },
     387                 :            :     { 0x84, 0x5a, "AudibleAlarmControl" },
     388                 :            :     { 0x84, 0x60, "Present" },
     389                 :            :     { 0x84, 0x61, "Good" },
     390                 :            :     { 0x84, 0x62, "InternalFailure" },
     391                 :            :     { 0x84, 0x65, "Overload" },
     392                 :            :     { 0x84, 0x66, "OverCharged" },
     393                 :            :     { 0x84, 0x67, "OverTemperature" },
     394                 :            :     { 0x84, 0x68, "ShutdownRequested" },
     395                 :            :     { 0x84, 0x69, "ShutdownImminent" },
     396                 :            :     { 0x84, 0x6b, "SwitchOn/Off" },
     397                 :            :     { 0x84, 0x6c, "Switchable" },
     398                 :            :     { 0x84, 0x6d, "Used" },
     399                 :            :     { 0x84, 0x6e, "Boost" },
     400                 :            :     { 0x84, 0x73, "CommunicationLost" },
     401                 :            :     { 0x84, 0xfd, "iManufacturer" },
     402                 :            :     { 0x84, 0xfe, "iProduct" },
     403                 :            :     { 0x84, 0xff, "iSerialNumber" },
     404                 :            :   { 0x85, 0, "Battery System" },
     405                 :            :     { 0x85, 0x01, "SMBBatteryMode" },
     406                 :            :     { 0x85, 0x02, "SMBBatteryStatus" },
     407                 :            :     { 0x85, 0x03, "SMBAlarmWarning" },
     408                 :            :     { 0x85, 0x04, "SMBChargerMode" },
     409                 :            :     { 0x85, 0x05, "SMBChargerStatus" },
     410                 :            :     { 0x85, 0x06, "SMBChargerSpecInfo" },
     411                 :            :     { 0x85, 0x07, "SMBSelectorState" },
     412                 :            :     { 0x85, 0x08, "SMBSelectorPresets" },
     413                 :            :     { 0x85, 0x09, "SMBSelectorInfo" },
     414                 :            :     { 0x85, 0x29, "RemainingCapacityLimit" },
     415                 :            :     { 0x85, 0x2c, "CapacityMode" },
     416                 :            :     { 0x85, 0x42, "BelowRemainingCapacityLimit" },
     417                 :            :     { 0x85, 0x44, "Charging" },
     418                 :            :     { 0x85, 0x45, "Discharging" },
     419                 :            :     { 0x85, 0x4b, "NeedReplacement" },
     420                 :            :     { 0x85, 0x66, "RemainingCapacity" },
     421                 :            :     { 0x85, 0x68, "RunTimeToEmpty" },
     422                 :            :     { 0x85, 0x6a, "AverageTimeToFull" },
     423                 :            :     { 0x85, 0x83, "DesignCapacity" },
     424                 :            :     { 0x85, 0x85, "ManufacturerDate" },
     425                 :            :     { 0x85, 0x89, "iDeviceChemistry" },
     426                 :            :     { 0x85, 0x8b, "Rechargeable" },
     427                 :            :     { 0x85, 0x8f, "iOEMInformation" },
     428                 :            :     { 0x85, 0x8d, "CapacityGranularity1" },
     429                 :            :     { 0x85, 0xd0, "ACPresent" },
     430                 :            :   /* pages 0xff00 to 0xffff are vendor-specific */
     431                 :            :   { 0xffff, 0, "Vendor-specific-FF" },
     432                 :            :   { 0, 0, NULL }
     433                 :            : };
     434                 :            : 
     435                 :            : /* Either output directly into simple seq_file, or (if f == NULL)
     436                 :            :  * allocate a separate buffer that will then be passed to the 'events'
     437                 :            :  * ringbuffer.
     438                 :            :  *
     439                 :            :  * This is because these functions can be called both for "one-shot"
     440                 :            :  * "rdesc" while resolving, or for blocking "events".
     441                 :            :  *
     442                 :            :  * This holds both for resolv_usage_page() and hid_resolv_usage().
     443                 :            :  */
     444                 :          3 : static char *resolv_usage_page(unsigned page, struct seq_file *f) {
     445                 :            :         const struct hid_usage_entry *p;
     446                 :            :         char *buf = NULL;
     447                 :            : 
     448                 :          3 :         if (!f) {
     449                 :          3 :                 buf = kzalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC);
     450                 :          3 :                 if (!buf)
     451                 :            :                         return ERR_PTR(-ENOMEM);
     452                 :            :         }
     453                 :            : 
     454                 :          3 :         for (p = hid_usage_table; p->description; p++)
     455                 :          3 :                 if (p->page == page) {
     456                 :          3 :                         if (!f) {
     457                 :          3 :                                 snprintf(buf, HID_DEBUG_BUFSIZE, "%s",
     458                 :            :                                                 p->description);
     459                 :          3 :                                 return buf;
     460                 :            :                         }
     461                 :            :                         else {
     462                 :          0 :                                 seq_printf(f, "%s", p->description);
     463                 :          0 :                                 return NULL;
     464                 :            :                         }
     465                 :            :                 }
     466                 :          0 :         if (!f)
     467                 :          0 :                 snprintf(buf, HID_DEBUG_BUFSIZE, "%04x", page);
     468                 :            :         else
     469                 :          0 :                 seq_printf(f, "%04x", page);
     470                 :          0 :         return buf;
     471                 :            : }
     472                 :            : 
     473                 :          3 : char *hid_resolv_usage(unsigned usage, struct seq_file *f) {
     474                 :            :         const struct hid_usage_entry *p;
     475                 :            :         char *buf = NULL;
     476                 :            :         int len = 0;
     477                 :            : 
     478                 :          3 :         buf = resolv_usage_page(usage >> 16, f);
     479                 :          3 :         if (IS_ERR(buf)) {
     480                 :          0 :                 pr_err("error allocating HID debug buffer\n");
     481                 :          0 :                 return NULL;
     482                 :            :         }
     483                 :            : 
     484                 :            : 
     485                 :          3 :         if (!f) {
     486                 :          3 :                 len = strlen(buf);
     487                 :          3 :                 snprintf(buf+len, max(0, HID_DEBUG_BUFSIZE - len), ".");
     488                 :          3 :                 len++;
     489                 :            :         }
     490                 :            :         else {
     491                 :          0 :                 seq_printf(f, ".");
     492                 :            :         }
     493                 :          3 :         for (p = hid_usage_table; p->description; p++)
     494                 :          3 :                 if (p->page == (usage >> 16)) {
     495                 :          3 :                         for(++p; p->description && p->usage != 0; p++)
     496                 :          3 :                                 if (p->usage == (usage & 0xffff)) {
     497                 :          3 :                                         if (!f)
     498                 :          3 :                                                 snprintf(buf + len,
     499                 :          3 :                                                         max(0,HID_DEBUG_BUFSIZE - len - 1),
     500                 :            :                                                         "%s", p->description);
     501                 :            :                                         else
     502                 :          0 :                                                 seq_printf(f,
     503                 :            :                                                         "%s",
     504                 :            :                                                         p->description);
     505                 :          3 :                                         return buf;
     506                 :            :                                 }
     507                 :            :                         break;
     508                 :            :                 }
     509                 :          0 :         if (!f)
     510                 :          0 :                 snprintf(buf + len, max(0, HID_DEBUG_BUFSIZE - len - 1),
     511                 :            :                                 "%04x", usage & 0xffff);
     512                 :            :         else
     513                 :          0 :                 seq_printf(f, "%04x", usage & 0xffff);
     514                 :          0 :         return buf;
     515                 :            : }
     516                 :            : EXPORT_SYMBOL_GPL(hid_resolv_usage);
     517                 :            : 
     518                 :            : static void tab(int n, struct seq_file *f) {
     519                 :          0 :         seq_printf(f, "%*s", n, "");
     520                 :            : }
     521                 :            : 
     522                 :          0 : void hid_dump_field(struct hid_field *field, int n, struct seq_file *f) {
     523                 :            :         int j;
     524                 :            : 
     525                 :          0 :         if (field->physical) {
     526                 :            :                 tab(n, f);
     527                 :          0 :                 seq_printf(f, "Physical(");
     528                 :          0 :                 hid_resolv_usage(field->physical, f); seq_printf(f, ")\n");
     529                 :            :         }
     530                 :          0 :         if (field->logical) {
     531                 :            :                 tab(n, f);
     532                 :          0 :                 seq_printf(f, "Logical(");
     533                 :          0 :                 hid_resolv_usage(field->logical, f); seq_printf(f, ")\n");
     534                 :            :         }
     535                 :          0 :         if (field->application) {
     536                 :            :                 tab(n, f);
     537                 :          0 :                 seq_printf(f, "Application(");
     538                 :          0 :                 hid_resolv_usage(field->application, f); seq_printf(f, ")\n");
     539                 :            :         }
     540                 :          0 :         tab(n, f); seq_printf(f, "Usage(%d)\n", field->maxusage);
     541                 :          0 :         for (j = 0; j < field->maxusage; j++) {
     542                 :          0 :                 tab(n+2, f); hid_resolv_usage(field->usage[j].hid, f); seq_printf(f, "\n");
     543                 :            :         }
     544                 :          0 :         if (field->logical_minimum != field->logical_maximum) {
     545                 :          0 :                 tab(n, f); seq_printf(f, "Logical Minimum(%d)\n", field->logical_minimum);
     546                 :          0 :                 tab(n, f); seq_printf(f, "Logical Maximum(%d)\n", field->logical_maximum);
     547                 :            :         }
     548                 :          0 :         if (field->physical_minimum != field->physical_maximum) {
     549                 :          0 :                 tab(n, f); seq_printf(f, "Physical Minimum(%d)\n", field->physical_minimum);
     550                 :          0 :                 tab(n, f); seq_printf(f, "Physical Maximum(%d)\n", field->physical_maximum);
     551                 :            :         }
     552                 :          0 :         if (field->unit_exponent) {
     553                 :          0 :                 tab(n, f); seq_printf(f, "Unit Exponent(%d)\n", field->unit_exponent);
     554                 :            :         }
     555                 :          0 :         if (field->unit) {
     556                 :            :                 static const char *systems[5] = { "None", "SI Linear", "SI Rotation", "English Linear", "English Rotation" };
     557                 :            :                 static const char *units[5][8] = {
     558                 :            :                         { "None", "None", "None", "None", "None", "None", "None", "None" },
     559                 :            :                         { "None", "Centimeter", "Gram", "Seconds", "Kelvin",     "Ampere", "Candela", "None" },
     560                 :            :                         { "None", "Radians",    "Gram", "Seconds", "Kelvin",     "Ampere", "Candela", "None" },
     561                 :            :                         { "None", "Inch",       "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" },
     562                 :            :                         { "None", "Degrees",    "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" }
     563                 :            :                 };
     564                 :            : 
     565                 :            :                 int i;
     566                 :            :                 int sys;
     567                 :            :                 __u32 data = field->unit;
     568                 :            : 
     569                 :            :                 /* First nibble tells us which system we're in. */
     570                 :          0 :                 sys = data & 0xf;
     571                 :          0 :                 data >>= 4;
     572                 :            : 
     573                 :          0 :                 if(sys > 4) {
     574                 :          0 :                         tab(n, f); seq_printf(f, "Unit(Invalid)\n");
     575                 :            :                 }
     576                 :            :                 else {
     577                 :            :                         int earlier_unit = 0;
     578                 :            : 
     579                 :          0 :                         tab(n, f); seq_printf(f, "Unit(%s : ", systems[sys]);
     580                 :            : 
     581                 :          0 :                         for (i=1 ; i<sizeof(__u32)*2 ; i++) {
     582                 :          0 :                                 char nibble = data & 0xf;
     583                 :          0 :                                 data >>= 4;
     584                 :          0 :                                 if (nibble != 0) {
     585                 :          0 :                                         if(earlier_unit++ > 0)
     586                 :          0 :                                                 seq_printf(f, "*");
     587                 :          0 :                                         seq_printf(f, "%s", units[sys][i]);
     588                 :          0 :                                         if(nibble != 1) {
     589                 :            :                                                 /* This is a _signed_ nibble(!) */
     590                 :            : 
     591                 :          0 :                                                 int val = nibble & 0x7;
     592                 :          0 :                                                 if(nibble & 0x08)
     593                 :          0 :                                                         val = -((0x7 & ~val) +1);
     594                 :          0 :                                                 seq_printf(f, "^%d", val);
     595                 :            :                                         }
     596                 :            :                                 }
     597                 :            :                         }
     598                 :          0 :                         seq_printf(f, ")\n");
     599                 :            :                 }
     600                 :            :         }
     601                 :          0 :         tab(n, f); seq_printf(f, "Report Size(%u)\n", field->report_size);
     602                 :          0 :         tab(n, f); seq_printf(f, "Report Count(%u)\n", field->report_count);
     603                 :          0 :         tab(n, f); seq_printf(f, "Report Offset(%u)\n", field->report_offset);
     604                 :            : 
     605                 :          0 :         tab(n, f); seq_printf(f, "Flags( ");
     606                 :          0 :         j = field->flags;
     607                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_CONSTANT & j ? "Constant " : "");
     608                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_VARIABLE & j ? "Variable " : "Array ");
     609                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_RELATIVE & j ? "Relative " : "Absolute ");
     610                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_WRAP & j ? "Wrap " : "");
     611                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_NONLINEAR & j ? "NonLinear " : "");
     612                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_NO_PREFERRED & j ? "NoPreferredState " : "");
     613                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_NULL_STATE & j ? "NullState " : "");
     614                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_VOLATILE & j ? "Volatile " : "");
     615                 :          0 :         seq_printf(f, "%s", HID_MAIN_ITEM_BUFFERED_BYTE & j ? "BufferedByte " : "");
     616                 :          0 :         seq_printf(f, ")\n");
     617                 :          0 : }
     618                 :            : EXPORT_SYMBOL_GPL(hid_dump_field);
     619                 :            : 
     620                 :          0 : void hid_dump_device(struct hid_device *device, struct seq_file *f)
     621                 :            : {
     622                 :            :         struct hid_report_enum *report_enum;
     623                 :            :         struct hid_report *report;
     624                 :            :         struct list_head *list;
     625                 :            :         unsigned i,k;
     626                 :            :         static const char *table[] = {"INPUT", "OUTPUT", "FEATURE"};
     627                 :            : 
     628                 :          0 :         for (i = 0; i < HID_REPORT_TYPES; i++) {
     629                 :            :                 report_enum = device->report_enum + i;
     630                 :          0 :                 list = report_enum->report_list.next;
     631                 :          0 :                 while (list != &report_enum->report_list) {
     632                 :            :                         report = (struct hid_report *) list;
     633                 :            :                         tab(2, f);
     634                 :          0 :                         seq_printf(f, "%s", table[i]);
     635                 :          0 :                         if (report->id)
     636                 :          0 :                                 seq_printf(f, "(%d)", report->id);
     637                 :          0 :                         seq_printf(f, "[%s]", table[report->type]);
     638                 :          0 :                         seq_printf(f, "\n");
     639                 :          0 :                         for (k = 0; k < report->maxfield; k++) {
     640                 :            :                                 tab(4, f);
     641                 :          0 :                                 seq_printf(f, "Field(%d)\n", k);
     642                 :          0 :                                 hid_dump_field(report->field[k], 6, f);
     643                 :            :                         }
     644                 :          0 :                         list = list->next;
     645                 :            :                 }
     646                 :            :         }
     647                 :          0 : }
     648                 :            : EXPORT_SYMBOL_GPL(hid_dump_device);
     649                 :            : 
     650                 :            : /* enqueue string to 'events' ring buffer */
     651                 :          3 : void hid_debug_event(struct hid_device *hdev, char *buf)
     652                 :            : {
     653                 :            :         struct hid_debug_list *list;
     654                 :            :         unsigned long flags;
     655                 :            : 
     656                 :          3 :         spin_lock_irqsave(&hdev->debug_list_lock, flags);
     657                 :          3 :         list_for_each_entry(list, &hdev->debug_list, node)
     658                 :          0 :                 kfifo_in(&list->hid_debug_fifo, buf, strlen(buf));
     659                 :            :         spin_unlock_irqrestore(&hdev->debug_list_lock, flags);
     660                 :            : 
     661                 :          3 :         wake_up_interruptible(&hdev->debug_wait);
     662                 :          3 : }
     663                 :            : EXPORT_SYMBOL_GPL(hid_debug_event);
     664                 :            : 
     665                 :          0 : void hid_dump_report(struct hid_device *hid, int type, u8 *data,
     666                 :            :                 int size)
     667                 :            : {
     668                 :            :         struct hid_report_enum *report_enum;
     669                 :            :         char *buf;
     670                 :            :         unsigned int i;
     671                 :            : 
     672                 :            :         buf = kmalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC);
     673                 :            : 
     674                 :          0 :         if (!buf)
     675                 :          0 :                 return;
     676                 :            : 
     677                 :          0 :         report_enum = hid->report_enum + type;
     678                 :            : 
     679                 :            :         /* dump the report */
     680                 :          0 :         snprintf(buf, HID_DEBUG_BUFSIZE - 1,
     681                 :            :                         "\nreport (size %u) (%snumbered) = ", size,
     682                 :          0 :                         report_enum->numbered ? "" : "un");
     683                 :          0 :         hid_debug_event(hid, buf);
     684                 :            : 
     685                 :          0 :         for (i = 0; i < size; i++) {
     686                 :          0 :                 snprintf(buf, HID_DEBUG_BUFSIZE - 1,
     687                 :          0 :                                 " %02x", data[i]);
     688                 :          0 :                 hid_debug_event(hid, buf);
     689                 :            :         }
     690                 :          0 :         hid_debug_event(hid, "\n");
     691                 :          0 :         kfree(buf);
     692                 :            : }
     693                 :            : EXPORT_SYMBOL_GPL(hid_dump_report);
     694                 :            : 
     695                 :          3 : void hid_dump_input(struct hid_device *hdev, struct hid_usage *usage, __s32 value)
     696                 :            : {
     697                 :            :         char *buf;
     698                 :            :         int len;
     699                 :            : 
     700                 :          3 :         buf = hid_resolv_usage(usage->hid, NULL);
     701                 :          3 :         if (!buf)
     702                 :          3 :                 return;
     703                 :          3 :         len = strlen(buf);
     704                 :          3 :         snprintf(buf + len, HID_DEBUG_BUFSIZE - len - 1, " = %d\n", value);
     705                 :            : 
     706                 :          3 :         hid_debug_event(hdev, buf);
     707                 :            : 
     708                 :          3 :         kfree(buf);
     709                 :          3 :         wake_up_interruptible(&hdev->debug_wait);
     710                 :            : }
     711                 :            : EXPORT_SYMBOL_GPL(hid_dump_input);
     712                 :            : 
     713                 :            : static const char *events[EV_MAX + 1] = {
     714                 :            :         [EV_SYN] = "Sync",                    [EV_KEY] = "Key",
     715                 :            :         [EV_REL] = "Relative",                        [EV_ABS] = "Absolute",
     716                 :            :         [EV_MSC] = "Misc",                    [EV_LED] = "LED",
     717                 :            :         [EV_SND] = "Sound",                   [EV_REP] = "Repeat",
     718                 :            :         [EV_FF] = "ForceFeedback",            [EV_PWR] = "Power",
     719                 :            :         [EV_FF_STATUS] = "ForceFeedbackStatus",
     720                 :            : };
     721                 :            : 
     722                 :            : static const char *syncs[3] = {
     723                 :            :         [SYN_REPORT] = "Report",              [SYN_CONFIG] = "Config",
     724                 :            :         [SYN_MT_REPORT] = "MT Report",
     725                 :            : };
     726                 :            : 
     727                 :            : static const char *keys[KEY_MAX + 1] = {
     728                 :            :         [KEY_RESERVED] = "Reserved",          [KEY_ESC] = "Esc",
     729                 :            :         [KEY_1] = "1",                                [KEY_2] = "2",
     730                 :            :         [KEY_3] = "3",                                [KEY_4] = "4",
     731                 :            :         [KEY_5] = "5",                                [KEY_6] = "6",
     732                 :            :         [KEY_7] = "7",                                [KEY_8] = "8",
     733                 :            :         [KEY_9] = "9",                                [KEY_0] = "0",
     734                 :            :         [KEY_MINUS] = "Minus",                        [KEY_EQUAL] = "Equal",
     735                 :            :         [KEY_BACKSPACE] = "Backspace",                [KEY_TAB] = "Tab",
     736                 :            :         [KEY_Q] = "Q",                                [KEY_W] = "W",
     737                 :            :         [KEY_E] = "E",                                [KEY_R] = "R",
     738                 :            :         [KEY_T] = "T",                                [KEY_Y] = "Y",
     739                 :            :         [KEY_U] = "U",                                [KEY_I] = "I",
     740                 :            :         [KEY_O] = "O",                                [KEY_P] = "P",
     741                 :            :         [KEY_LEFTBRACE] = "LeftBrace",                [KEY_RIGHTBRACE] = "RightBrace",
     742                 :            :         [KEY_ENTER] = "Enter",                        [KEY_LEFTCTRL] = "LeftControl",
     743                 :            :         [KEY_A] = "A",                                [KEY_S] = "S",
     744                 :            :         [KEY_D] = "D",                                [KEY_F] = "F",
     745                 :            :         [KEY_G] = "G",                                [KEY_H] = "H",
     746                 :            :         [KEY_J] = "J",                                [KEY_K] = "K",
     747                 :            :         [KEY_L] = "L",                                [KEY_SEMICOLON] = "Semicolon",
     748                 :            :         [KEY_APOSTROPHE] = "Apostrophe",      [KEY_GRAVE] = "Grave",
     749                 :            :         [KEY_LEFTSHIFT] = "LeftShift",                [KEY_BACKSLASH] = "BackSlash",
     750                 :            :         [KEY_Z] = "Z",                                [KEY_X] = "X",
     751                 :            :         [KEY_C] = "C",                                [KEY_V] = "V",
     752                 :            :         [KEY_B] = "B",                                [KEY_N] = "N",
     753                 :            :         [KEY_M] = "M",                                [KEY_COMMA] = "Comma",
     754                 :            :         [KEY_DOT] = "Dot",                    [KEY_SLASH] = "Slash",
     755                 :            :         [KEY_RIGHTSHIFT] = "RightShift",      [KEY_KPASTERISK] = "KPAsterisk",
     756                 :            :         [KEY_LEFTALT] = "LeftAlt",            [KEY_SPACE] = "Space",
     757                 :            :         [KEY_CAPSLOCK] = "CapsLock",          [KEY_F1] = "F1",
     758                 :            :         [KEY_F2] = "F2",                      [KEY_F3] = "F3",
     759                 :            :         [KEY_F4] = "F4",                      [KEY_F5] = "F5",
     760                 :            :         [KEY_F6] = "F6",                      [KEY_F7] = "F7",
     761                 :            :         [KEY_F8] = "F8",                      [KEY_F9] = "F9",
     762                 :            :         [KEY_F10] = "F10",                    [KEY_NUMLOCK] = "NumLock",
     763                 :            :         [KEY_SCROLLLOCK] = "ScrollLock",      [KEY_KP7] = "KP7",
     764                 :            :         [KEY_KP8] = "KP8",                    [KEY_KP9] = "KP9",
     765                 :            :         [KEY_KPMINUS] = "KPMinus",            [KEY_KP4] = "KP4",
     766                 :            :         [KEY_KP5] = "KP5",                    [KEY_KP6] = "KP6",
     767                 :            :         [KEY_KPPLUS] = "KPPlus",              [KEY_KP1] = "KP1",
     768                 :            :         [KEY_KP2] = "KP2",                    [KEY_KP3] = "KP3",
     769                 :            :         [KEY_KP0] = "KP0",                    [KEY_KPDOT] = "KPDot",
     770                 :            :         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
     771                 :            :         [KEY_F11] = "F11",                    [KEY_F12] = "F12",
     772                 :            :         [KEY_RO] = "RO",                      [KEY_KATAKANA] = "Katakana",
     773                 :            :         [KEY_HIRAGANA] = "HIRAGANA",          [KEY_HENKAN] = "Henkan",
     774                 :            :         [KEY_KATAKANAHIRAGANA] = "Katakana/Hiragana", [KEY_MUHENKAN] = "Muhenkan",
     775                 :            :         [KEY_KPJPCOMMA] = "KPJpComma",                [KEY_KPENTER] = "KPEnter",
     776                 :            :         [KEY_RIGHTCTRL] = "RightCtrl",                [KEY_KPSLASH] = "KPSlash",
     777                 :            :         [KEY_SYSRQ] = "SysRq",                        [KEY_RIGHTALT] = "RightAlt",
     778                 :            :         [KEY_LINEFEED] = "LineFeed",          [KEY_HOME] = "Home",
     779                 :            :         [KEY_UP] = "Up",                      [KEY_PAGEUP] = "PageUp",
     780                 :            :         [KEY_LEFT] = "Left",                  [KEY_RIGHT] = "Right",
     781                 :            :         [KEY_END] = "End",                    [KEY_DOWN] = "Down",
     782                 :            :         [KEY_PAGEDOWN] = "PageDown",          [KEY_INSERT] = "Insert",
     783                 :            :         [KEY_DELETE] = "Delete",              [KEY_MACRO] = "Macro",
     784                 :            :         [KEY_MUTE] = "Mute",                  [KEY_VOLUMEDOWN] = "VolumeDown",
     785                 :            :         [KEY_VOLUMEUP] = "VolumeUp",          [KEY_POWER] = "Power",
     786                 :            :         [KEY_KPEQUAL] = "KPEqual",            [KEY_KPPLUSMINUS] = "KPPlusMinus",
     787                 :            :         [KEY_PAUSE] = "Pause",                        [KEY_KPCOMMA] = "KPComma",
     788                 :            :         [KEY_HANGUEL] = "Hangeul",            [KEY_HANJA] = "Hanja",
     789                 :            :         [KEY_YEN] = "Yen",                    [KEY_LEFTMETA] = "LeftMeta",
     790                 :            :         [KEY_RIGHTMETA] = "RightMeta",                [KEY_COMPOSE] = "Compose",
     791                 :            :         [KEY_STOP] = "Stop",                  [KEY_AGAIN] = "Again",
     792                 :            :         [KEY_PROPS] = "Props",                        [KEY_UNDO] = "Undo",
     793                 :            :         [KEY_FRONT] = "Front",                        [KEY_COPY] = "Copy",
     794                 :            :         [KEY_OPEN] = "Open",                  [KEY_PASTE] = "Paste",
     795                 :            :         [KEY_FIND] = "Find",                  [KEY_CUT] = "Cut",
     796                 :            :         [KEY_HELP] = "Help",                  [KEY_MENU] = "Menu",
     797                 :            :         [KEY_CALC] = "Calc",                  [KEY_SETUP] = "Setup",
     798                 :            :         [KEY_SLEEP] = "Sleep",                        [KEY_WAKEUP] = "WakeUp",
     799                 :            :         [KEY_FILE] = "File",                  [KEY_SENDFILE] = "SendFile",
     800                 :            :         [KEY_DELETEFILE] = "DeleteFile",      [KEY_XFER] = "X-fer",
     801                 :            :         [KEY_PROG1] = "Prog1",                        [KEY_PROG2] = "Prog2",
     802                 :            :         [KEY_WWW] = "WWW",                    [KEY_MSDOS] = "MSDOS",
     803                 :            :         [KEY_COFFEE] = "Coffee",              [KEY_ROTATE_DISPLAY] = "RotateDisplay",
     804                 :            :         [KEY_CYCLEWINDOWS] = "CycleWindows",  [KEY_MAIL] = "Mail",
     805                 :            :         [KEY_BOOKMARKS] = "Bookmarks",                [KEY_COMPUTER] = "Computer",
     806                 :            :         [KEY_BACK] = "Back",                  [KEY_FORWARD] = "Forward",
     807                 :            :         [KEY_CLOSECD] = "CloseCD",            [KEY_EJECTCD] = "EjectCD",
     808                 :            :         [KEY_EJECTCLOSECD] = "EjectCloseCD",  [KEY_NEXTSONG] = "NextSong",
     809                 :            :         [KEY_PLAYPAUSE] = "PlayPause",                [KEY_PREVIOUSSONG] = "PreviousSong",
     810                 :            :         [KEY_STOPCD] = "StopCD",              [KEY_RECORD] = "Record",
     811                 :            :         [KEY_REWIND] = "Rewind",              [KEY_PHONE] = "Phone",
     812                 :            :         [KEY_ISO] = "ISOKey",                 [KEY_CONFIG] = "Config",
     813                 :            :         [KEY_HOMEPAGE] = "HomePage",          [KEY_REFRESH] = "Refresh",
     814                 :            :         [KEY_EXIT] = "Exit",                  [KEY_MOVE] = "Move",
     815                 :            :         [KEY_EDIT] = "Edit",                  [KEY_SCROLLUP] = "ScrollUp",
     816                 :            :         [KEY_SCROLLDOWN] = "ScrollDown",      [KEY_KPLEFTPAREN] = "KPLeftParenthesis",
     817                 :            :         [KEY_KPRIGHTPAREN] = "KPRightParenthesis", [KEY_NEW] = "New",
     818                 :            :         [KEY_REDO] = "Redo",                  [KEY_F13] = "F13",
     819                 :            :         [KEY_F14] = "F14",                    [KEY_F15] = "F15",
     820                 :            :         [KEY_F16] = "F16",                    [KEY_F17] = "F17",
     821                 :            :         [KEY_F18] = "F18",                    [KEY_F19] = "F19",
     822                 :            :         [KEY_F20] = "F20",                    [KEY_F21] = "F21",
     823                 :            :         [KEY_F22] = "F22",                    [KEY_F23] = "F23",
     824                 :            :         [KEY_F24] = "F24",                    [KEY_PLAYCD] = "PlayCD",
     825                 :            :         [KEY_PAUSECD] = "PauseCD",            [KEY_PROG3] = "Prog3",
     826                 :            :         [KEY_PROG4] = "Prog4",                        [KEY_SUSPEND] = "Suspend",
     827                 :            :         [KEY_CLOSE] = "Close",                        [KEY_PLAY] = "Play",
     828                 :            :         [KEY_FASTFORWARD] = "FastForward",    [KEY_BASSBOOST] = "BassBoost",
     829                 :            :         [KEY_PRINT] = "Print",                        [KEY_HP] = "HP",
     830                 :            :         [KEY_CAMERA] = "Camera",              [KEY_SOUND] = "Sound",
     831                 :            :         [KEY_QUESTION] = "Question",          [KEY_EMAIL] = "Email",
     832                 :            :         [KEY_CHAT] = "Chat",                  [KEY_SEARCH] = "Search",
     833                 :            :         [KEY_CONNECT] = "Connect",            [KEY_FINANCE] = "Finance",
     834                 :            :         [KEY_SPORT] = "Sport",                        [KEY_SHOP] = "Shop",
     835                 :            :         [KEY_ALTERASE] = "AlternateErase",    [KEY_CANCEL] = "Cancel",
     836                 :            :         [KEY_BRIGHTNESSDOWN] = "BrightnessDown", [KEY_BRIGHTNESSUP] = "BrightnessUp",
     837                 :            :         [KEY_MEDIA] = "Media",                        [KEY_UNKNOWN] = "Unknown",
     838                 :            :         [BTN_DPAD_UP] = "BtnDPadUp",          [BTN_DPAD_DOWN] = "BtnDPadDown",
     839                 :            :         [BTN_DPAD_LEFT] = "BtnDPadLeft",      [BTN_DPAD_RIGHT] = "BtnDPadRight",
     840                 :            :         [BTN_0] = "Btn0",                     [BTN_1] = "Btn1",
     841                 :            :         [BTN_2] = "Btn2",                     [BTN_3] = "Btn3",
     842                 :            :         [BTN_4] = "Btn4",                     [BTN_5] = "Btn5",
     843                 :            :         [BTN_6] = "Btn6",                     [BTN_7] = "Btn7",
     844                 :            :         [BTN_8] = "Btn8",                     [BTN_9] = "Btn9",
     845                 :            :         [BTN_LEFT] = "LeftBtn",                       [BTN_RIGHT] = "RightBtn",
     846                 :            :         [BTN_MIDDLE] = "MiddleBtn",           [BTN_SIDE] = "SideBtn",
     847                 :            :         [BTN_EXTRA] = "ExtraBtn",             [BTN_FORWARD] = "ForwardBtn",
     848                 :            :         [BTN_BACK] = "BackBtn",                       [BTN_TASK] = "TaskBtn",
     849                 :            :         [BTN_TRIGGER] = "Trigger",            [BTN_THUMB] = "ThumbBtn",
     850                 :            :         [BTN_THUMB2] = "ThumbBtn2",           [BTN_TOP] = "TopBtn",
     851                 :            :         [BTN_TOP2] = "TopBtn2",                       [BTN_PINKIE] = "PinkieBtn",
     852                 :            :         [BTN_BASE] = "BaseBtn",                       [BTN_BASE2] = "BaseBtn2",
     853                 :            :         [BTN_BASE3] = "BaseBtn3",             [BTN_BASE4] = "BaseBtn4",
     854                 :            :         [BTN_BASE5] = "BaseBtn5",             [BTN_BASE6] = "BaseBtn6",
     855                 :            :         [BTN_DEAD] = "BtnDead",                       [BTN_A] = "BtnA",
     856                 :            :         [BTN_B] = "BtnB",                     [BTN_C] = "BtnC",
     857                 :            :         [BTN_X] = "BtnX",                     [BTN_Y] = "BtnY",
     858                 :            :         [BTN_Z] = "BtnZ",                     [BTN_TL] = "BtnTL",
     859                 :            :         [BTN_TR] = "BtnTR",                   [BTN_TL2] = "BtnTL2",
     860                 :            :         [BTN_TR2] = "BtnTR2",                 [BTN_SELECT] = "BtnSelect",
     861                 :            :         [BTN_START] = "BtnStart",             [BTN_MODE] = "BtnMode",
     862                 :            :         [BTN_THUMBL] = "BtnThumbL",           [BTN_THUMBR] = "BtnThumbR",
     863                 :            :         [BTN_TOOL_PEN] = "ToolPen",           [BTN_TOOL_RUBBER] = "ToolRubber",
     864                 :            :         [BTN_TOOL_BRUSH] = "ToolBrush",               [BTN_TOOL_PENCIL] = "ToolPencil",
     865                 :            :         [BTN_TOOL_AIRBRUSH] = "ToolAirbrush", [BTN_TOOL_FINGER] = "ToolFinger",
     866                 :            :         [BTN_TOOL_MOUSE] = "ToolMouse",               [BTN_TOOL_LENS] = "ToolLens",
     867                 :            :         [BTN_TOUCH] = "Touch",                        [BTN_STYLUS] = "Stylus",
     868                 :            :         [BTN_STYLUS2] = "Stylus2",            [BTN_TOOL_DOUBLETAP] = "ToolDoubleTap",
     869                 :            :         [BTN_TOOL_TRIPLETAP] = "ToolTripleTap",       [BTN_TOOL_QUADTAP] = "ToolQuadrupleTap",
     870                 :            :         [BTN_GEAR_DOWN] = "WheelBtn",
     871                 :            :         [BTN_GEAR_UP] = "Gear up",            [KEY_OK] = "Ok",
     872                 :            :         [KEY_SELECT] = "Select",              [KEY_GOTO] = "Goto",
     873                 :            :         [KEY_CLEAR] = "Clear",                        [KEY_POWER2] = "Power2",
     874                 :            :         [KEY_OPTION] = "Option",              [KEY_INFO] = "Info",
     875                 :            :         [KEY_TIME] = "Time",                  [KEY_VENDOR] = "Vendor",
     876                 :            :         [KEY_ARCHIVE] = "Archive",            [KEY_PROGRAM] = "Program",
     877                 :            :         [KEY_CHANNEL] = "Channel",            [KEY_FAVORITES] = "Favorites",
     878                 :            :         [KEY_EPG] = "EPG",                    [KEY_PVR] = "PVR",
     879                 :            :         [KEY_MHP] = "MHP",                    [KEY_LANGUAGE] = "Language",
     880                 :            :         [KEY_TITLE] = "Title",                        [KEY_SUBTITLE] = "Subtitle",
     881                 :            :         [KEY_ANGLE] = "Angle",                        [KEY_ZOOM] = "Zoom",
     882                 :            :         [KEY_MODE] = "Mode",                  [KEY_KEYBOARD] = "Keyboard",
     883                 :            :         [KEY_SCREEN] = "Screen",              [KEY_PC] = "PC",
     884                 :            :         [KEY_TV] = "TV",                      [KEY_TV2] = "TV2",
     885                 :            :         [KEY_VCR] = "VCR",                    [KEY_VCR2] = "VCR2",
     886                 :            :         [KEY_SAT] = "Sat",                    [KEY_SAT2] = "Sat2",
     887                 :            :         [KEY_CD] = "CD",                      [KEY_TAPE] = "Tape",
     888                 :            :         [KEY_RADIO] = "Radio",                        [KEY_TUNER] = "Tuner",
     889                 :            :         [KEY_PLAYER] = "Player",              [KEY_TEXT] = "Text",
     890                 :            :         [KEY_DVD] = "DVD",                    [KEY_AUX] = "Aux",
     891                 :            :         [KEY_MP3] = "MP3",                    [KEY_AUDIO] = "Audio",
     892                 :            :         [KEY_VIDEO] = "Video",                        [KEY_DIRECTORY] = "Directory",
     893                 :            :         [KEY_LIST] = "List",                  [KEY_MEMO] = "Memo",
     894                 :            :         [KEY_CALENDAR] = "Calendar",          [KEY_RED] = "Red",
     895                 :            :         [KEY_GREEN] = "Green",                        [KEY_YELLOW] = "Yellow",
     896                 :            :         [KEY_BLUE] = "Blue",                  [KEY_CHANNELUP] = "ChannelUp",
     897                 :            :         [KEY_CHANNELDOWN] = "ChannelDown",    [KEY_FIRST] = "First",
     898                 :            :         [KEY_LAST] = "Last",                  [KEY_AB] = "AB",
     899                 :            :         [KEY_NEXT] = "Next",                  [KEY_RESTART] = "Restart",
     900                 :            :         [KEY_SLOW] = "Slow",                  [KEY_SHUFFLE] = "Shuffle",
     901                 :            :         [KEY_BREAK] = "Break",                        [KEY_PREVIOUS] = "Previous",
     902                 :            :         [KEY_DIGITS] = "Digits",              [KEY_TEEN] = "TEEN",
     903                 :            :         [KEY_TWEN] = "TWEN",                  [KEY_DEL_EOL] = "DeleteEOL",
     904                 :            :         [KEY_DEL_EOS] = "DeleteEOS",          [KEY_INS_LINE] = "InsertLine",
     905                 :            :         [KEY_DEL_LINE] = "DeleteLine",
     906                 :            :         [KEY_SEND] = "Send",                  [KEY_REPLY] = "Reply",
     907                 :            :         [KEY_FORWARDMAIL] = "ForwardMail",    [KEY_SAVE] = "Save",
     908                 :            :         [KEY_DOCUMENTS] = "Documents",                [KEY_SPELLCHECK] = "SpellCheck",
     909                 :            :         [KEY_LOGOFF] = "Logoff",
     910                 :            :         [KEY_FN] = "Fn",                      [KEY_FN_ESC] = "Fn+ESC",
     911                 :            :         [KEY_FN_1] = "Fn+1",                  [KEY_FN_2] = "Fn+2",
     912                 :            :         [KEY_FN_B] = "Fn+B",                  [KEY_FN_D] = "Fn+D",
     913                 :            :         [KEY_FN_E] = "Fn+E",                  [KEY_FN_F] = "Fn+F",
     914                 :            :         [KEY_FN_S] = "Fn+S",
     915                 :            :         [KEY_FN_F1] = "Fn+F1",                        [KEY_FN_F2] = "Fn+F2",
     916                 :            :         [KEY_FN_F3] = "Fn+F3",                        [KEY_FN_F4] = "Fn+F4",
     917                 :            :         [KEY_FN_F5] = "Fn+F5",                        [KEY_FN_F6] = "Fn+F6",
     918                 :            :         [KEY_FN_F7] = "Fn+F7",                        [KEY_FN_F8] = "Fn+F8",
     919                 :            :         [KEY_FN_F9] = "Fn+F9",                        [KEY_FN_F10] = "Fn+F10",
     920                 :            :         [KEY_FN_F11] = "Fn+F11",              [KEY_FN_F12] = "Fn+F12",
     921                 :            :         [KEY_KBDILLUMTOGGLE] = "KbdIlluminationToggle",
     922                 :            :         [KEY_KBDILLUMDOWN] = "KbdIlluminationDown",
     923                 :            :         [KEY_KBDILLUMUP] = "KbdIlluminationUp",
     924                 :            :         [KEY_SWITCHVIDEOMODE] = "SwitchVideoMode",
     925                 :            :         [KEY_BUTTONCONFIG] = "ButtonConfig",
     926                 :            :         [KEY_TASKMANAGER] = "TaskManager",
     927                 :            :         [KEY_JOURNAL] = "Journal",
     928                 :            :         [KEY_CONTROLPANEL] = "ControlPanel",
     929                 :            :         [KEY_APPSELECT] = "AppSelect",
     930                 :            :         [KEY_SCREENSAVER] = "ScreenSaver",
     931                 :            :         [KEY_VOICECOMMAND] = "VoiceCommand",
     932                 :            :         [KEY_BRIGHTNESS_MIN] = "BrightnessMin",
     933                 :            :         [KEY_BRIGHTNESS_MAX] = "BrightnessMax",
     934                 :            :         [KEY_BRIGHTNESS_AUTO] = "BrightnessAuto",
     935                 :            :         [KEY_KBDINPUTASSIST_PREV] = "KbdInputAssistPrev",
     936                 :            :         [KEY_KBDINPUTASSIST_NEXT] = "KbdInputAssistNext",
     937                 :            :         [KEY_KBDINPUTASSIST_PREVGROUP] = "KbdInputAssistPrevGroup",
     938                 :            :         [KEY_KBDINPUTASSIST_NEXTGROUP] = "KbdInputAssistNextGroup",
     939                 :            :         [KEY_KBDINPUTASSIST_ACCEPT] = "KbdInputAssistAccept",
     940                 :            :         [KEY_KBDINPUTASSIST_CANCEL] = "KbdInputAssistCancel",
     941                 :            : };
     942                 :            : 
     943                 :            : static const char *relatives[REL_MAX + 1] = {
     944                 :            :         [REL_X] = "X",                        [REL_Y] = "Y",
     945                 :            :         [REL_Z] = "Z",                        [REL_RX] = "Rx",
     946                 :            :         [REL_RY] = "Ry",              [REL_RZ] = "Rz",
     947                 :            :         [REL_HWHEEL] = "HWheel",      [REL_DIAL] = "Dial",
     948                 :            :         [REL_WHEEL] = "Wheel",                [REL_MISC] = "Misc",
     949                 :            : };
     950                 :            : 
     951                 :            : static const char *absolutes[ABS_CNT] = {
     952                 :            :         [ABS_X] = "X",                        [ABS_Y] = "Y",
     953                 :            :         [ABS_Z] = "Z",                        [ABS_RX] = "Rx",
     954                 :            :         [ABS_RY] = "Ry",              [ABS_RZ] = "Rz",
     955                 :            :         [ABS_THROTTLE] = "Throttle",  [ABS_RUDDER] = "Rudder",
     956                 :            :         [ABS_WHEEL] = "Wheel",                [ABS_GAS] = "Gas",
     957                 :            :         [ABS_BRAKE] = "Brake",                [ABS_HAT0X] = "Hat0X",
     958                 :            :         [ABS_HAT0Y] = "Hat0Y",                [ABS_HAT1X] = "Hat1X",
     959                 :            :         [ABS_HAT1Y] = "Hat1Y",                [ABS_HAT2X] = "Hat2X",
     960                 :            :         [ABS_HAT2Y] = "Hat2Y",                [ABS_HAT3X] = "Hat3X",
     961                 :            :         [ABS_HAT3Y] = "Hat 3Y",               [ABS_PRESSURE] = "Pressure",
     962                 :            :         [ABS_DISTANCE] = "Distance",  [ABS_TILT_X] = "XTilt",
     963                 :            :         [ABS_TILT_Y] = "YTilt",               [ABS_TOOL_WIDTH] = "ToolWidth",
     964                 :            :         [ABS_VOLUME] = "Volume",      [ABS_MISC] = "Misc",
     965                 :            :         [ABS_MT_TOUCH_MAJOR] = "MTMajor",
     966                 :            :         [ABS_MT_TOUCH_MINOR] = "MTMinor",
     967                 :            :         [ABS_MT_WIDTH_MAJOR] = "MTMajorW",
     968                 :            :         [ABS_MT_WIDTH_MINOR] = "MTMinorW",
     969                 :            :         [ABS_MT_ORIENTATION] = "MTOrientation",
     970                 :            :         [ABS_MT_POSITION_X] = "MTPositionX",
     971                 :            :         [ABS_MT_POSITION_Y] = "MTPositionY",
     972                 :            :         [ABS_MT_TOOL_TYPE] = "MTToolType",
     973                 :            :         [ABS_MT_BLOB_ID] = "MTBlobID",
     974                 :            : };
     975                 :            : 
     976                 :            : static const char *misc[MSC_MAX + 1] = {
     977                 :            :         [MSC_SERIAL] = "Serial",      [MSC_PULSELED] = "Pulseled",
     978                 :            :         [MSC_GESTURE] = "Gesture",    [MSC_RAW] = "RawData"
     979                 :            : };
     980                 :            : 
     981                 :            : static const char *leds[LED_MAX + 1] = {
     982                 :            :         [LED_NUML] = "NumLock",               [LED_CAPSL] = "CapsLock",
     983                 :            :         [LED_SCROLLL] = "ScrollLock", [LED_COMPOSE] = "Compose",
     984                 :            :         [LED_KANA] = "Kana",          [LED_SLEEP] = "Sleep",
     985                 :            :         [LED_SUSPEND] = "Suspend",    [LED_MUTE] = "Mute",
     986                 :            :         [LED_MISC] = "Misc",
     987                 :            : };
     988                 :            : 
     989                 :            : static const char *repeats[REP_MAX + 1] = {
     990                 :            :         [REP_DELAY] = "Delay",                [REP_PERIOD] = "Period"
     991                 :            : };
     992                 :            : 
     993                 :            : static const char *sounds[SND_MAX + 1] = {
     994                 :            :         [SND_CLICK] = "Click",                [SND_BELL] = "Bell",
     995                 :            :         [SND_TONE] = "Tone"
     996                 :            : };
     997                 :            : 
     998                 :            : static const char **names[EV_MAX + 1] = {
     999                 :            :         [EV_SYN] = syncs,                       [EV_KEY] = keys,
    1000                 :            :         [EV_REL] = relatives,                   [EV_ABS] = absolutes,
    1001                 :            :         [EV_MSC] = misc,                        [EV_LED] = leds,
    1002                 :            :         [EV_SND] = sounds,                      [EV_REP] = repeats,
    1003                 :            : };
    1004                 :            : 
    1005                 :          0 : static void hid_resolv_event(__u8 type, __u16 code, struct seq_file *f)
    1006                 :            : {
    1007                 :          0 :         seq_printf(f, "%s.%s", events[type] ? events[type] : "?",
    1008                 :          0 :                 names[type] ? (names[type][code] ? names[type][code] : "?") : "?");
    1009                 :          0 : }
    1010                 :            : 
    1011                 :          0 : static void hid_dump_input_mapping(struct hid_device *hid, struct seq_file *f)
    1012                 :            : {
    1013                 :            :         int i, j, k;
    1014                 :            :         struct hid_report *report;
    1015                 :            :         struct hid_usage *usage;
    1016                 :            : 
    1017                 :          0 :         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
    1018                 :          0 :                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
    1019                 :          0 :                         for (i = 0; i < report->maxfield; i++) {
    1020                 :          0 :                                 for ( j = 0; j < report->field[i]->maxusage; j++) {
    1021                 :          0 :                                         usage = report->field[i]->usage + j;
    1022                 :          0 :                                         hid_resolv_usage(usage->hid, f);
    1023                 :          0 :                                         seq_printf(f, " ---> ");
    1024                 :          0 :                                         hid_resolv_event(usage->type, usage->code, f);
    1025                 :          0 :                                         seq_printf(f, "\n");
    1026                 :            :                                 }
    1027                 :            :                         }
    1028                 :            :                 }
    1029                 :            :         }
    1030                 :            : 
    1031                 :          0 : }
    1032                 :            : 
    1033                 :          0 : static int hid_debug_rdesc_show(struct seq_file *f, void *p)
    1034                 :            : {
    1035                 :          0 :         struct hid_device *hdev = f->private;
    1036                 :          0 :         const __u8 *rdesc = hdev->rdesc;
    1037                 :          0 :         unsigned rsize = hdev->rsize;
    1038                 :            :         int i;
    1039                 :            : 
    1040                 :          0 :         if (!rdesc) {
    1041                 :          0 :                 rdesc = hdev->dev_rdesc;
    1042                 :          0 :                 rsize = hdev->dev_rsize;
    1043                 :            :         }
    1044                 :            : 
    1045                 :            :         /* dump HID report descriptor */
    1046                 :          0 :         for (i = 0; i < rsize; i++)
    1047                 :          0 :                 seq_printf(f, "%02x ", rdesc[i]);
    1048                 :          0 :         seq_printf(f, "\n\n");
    1049                 :            : 
    1050                 :            :         /* dump parsed data and input mappings */
    1051                 :          0 :         if (down_interruptible(&hdev->driver_input_lock))
    1052                 :            :                 return 0;
    1053                 :            : 
    1054                 :          0 :         hid_dump_device(hdev, f);
    1055                 :          0 :         seq_printf(f, "\n");
    1056                 :          0 :         hid_dump_input_mapping(hdev, f);
    1057                 :            : 
    1058                 :          0 :         up(&hdev->driver_input_lock);
    1059                 :            : 
    1060                 :          0 :         return 0;
    1061                 :            : }
    1062                 :            : 
    1063                 :          0 : static int hid_debug_events_open(struct inode *inode, struct file *file)
    1064                 :            : {
    1065                 :            :         int err = 0;
    1066                 :            :         struct hid_debug_list *list;
    1067                 :            :         unsigned long flags;
    1068                 :            : 
    1069                 :          0 :         if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) {
    1070                 :            :                 err = -ENOMEM;
    1071                 :            :                 goto out;
    1072                 :            :         }
    1073                 :            : 
    1074                 :          0 :         err = kfifo_alloc(&list->hid_debug_fifo, HID_DEBUG_FIFOSIZE, GFP_KERNEL);
    1075                 :          0 :         if (err) {
    1076                 :          0 :                 kfree(list);
    1077                 :          0 :                 goto out;
    1078                 :            :         }
    1079                 :          0 :         list->hdev = (struct hid_device *) inode->i_private;
    1080                 :          0 :         file->private_data = list;
    1081                 :          0 :         mutex_init(&list->read_mutex);
    1082                 :            : 
    1083                 :          0 :         spin_lock_irqsave(&list->hdev->debug_list_lock, flags);
    1084                 :          0 :         list_add_tail(&list->node, &list->hdev->debug_list);
    1085                 :          0 :         spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags);
    1086                 :            : 
    1087                 :            : out:
    1088                 :          0 :         return err;
    1089                 :            : }
    1090                 :            : 
    1091                 :          0 : static ssize_t hid_debug_events_read(struct file *file, char __user *buffer,
    1092                 :            :                 size_t count, loff_t *ppos)
    1093                 :            : {
    1094                 :          0 :         struct hid_debug_list *list = file->private_data;
    1095                 :            :         int ret = 0, copied;
    1096                 :          0 :         DECLARE_WAITQUEUE(wait, current);
    1097                 :            : 
    1098                 :          0 :         mutex_lock(&list->read_mutex);
    1099                 :          0 :         if (kfifo_is_empty(&list->hid_debug_fifo)) {
    1100                 :          0 :                 add_wait_queue(&list->hdev->debug_wait, &wait);
    1101                 :          0 :                 set_current_state(TASK_INTERRUPTIBLE);
    1102                 :            : 
    1103                 :          0 :                 while (kfifo_is_empty(&list->hid_debug_fifo)) {
    1104                 :          0 :                         if (file->f_flags & O_NONBLOCK) {
    1105                 :            :                                 ret = -EAGAIN;
    1106                 :            :                                 break;
    1107                 :            :                         }
    1108                 :            : 
    1109                 :          0 :                         if (signal_pending(current)) {
    1110                 :            :                                 ret = -ERESTARTSYS;
    1111                 :            :                                 break;
    1112                 :            :                         }
    1113                 :            : 
    1114                 :            :                         /* if list->hdev is NULL we cannot remove_wait_queue().
    1115                 :            :                          * if list->hdev->debug is 0 then hid_debug_unregister()
    1116                 :            :                          * was already called and list->hdev is being destroyed.
    1117                 :            :                          * if we add remove_wait_queue() here we can hit a race.
    1118                 :            :                          */
    1119                 :          0 :                         if (!list->hdev || !list->hdev->debug) {
    1120                 :            :                                 ret = -EIO;
    1121                 :          0 :                                 set_current_state(TASK_RUNNING);
    1122                 :          0 :                                 goto out;
    1123                 :            :                         }
    1124                 :            : 
    1125                 :            :                         /* allow O_NONBLOCK from other threads */
    1126                 :          0 :                         mutex_unlock(&list->read_mutex);
    1127                 :          0 :                         schedule();
    1128                 :          0 :                         mutex_lock(&list->read_mutex);
    1129                 :          0 :                         set_current_state(TASK_INTERRUPTIBLE);
    1130                 :            :                 }
    1131                 :            : 
    1132                 :          0 :                 __set_current_state(TASK_RUNNING);
    1133                 :          0 :                 remove_wait_queue(&list->hdev->debug_wait, &wait);
    1134                 :            : 
    1135                 :          0 :                 if (ret)
    1136                 :            :                         goto out;
    1137                 :            :         }
    1138                 :            : 
    1139                 :            :         /* pass the fifo content to userspace, locking is not needed with only
    1140                 :            :          * one concurrent reader and one concurrent writer
    1141                 :            :          */
    1142                 :          0 :         ret = kfifo_to_user(&list->hid_debug_fifo, buffer, count, &copied);
    1143                 :          0 :         if (ret)
    1144                 :            :                 goto out;
    1145                 :          0 :         ret = copied;
    1146                 :            : out:
    1147                 :          0 :         mutex_unlock(&list->read_mutex);
    1148                 :          0 :         return ret;
    1149                 :            : }
    1150                 :            : 
    1151                 :          0 : static __poll_t hid_debug_events_poll(struct file *file, poll_table *wait)
    1152                 :            : {
    1153                 :          0 :         struct hid_debug_list *list = file->private_data;
    1154                 :            : 
    1155                 :          0 :         poll_wait(file, &list->hdev->debug_wait, wait);
    1156                 :          0 :         if (!kfifo_is_empty(&list->hid_debug_fifo))
    1157                 :            :                 return EPOLLIN | EPOLLRDNORM;
    1158                 :          0 :         if (!list->hdev->debug)
    1159                 :            :                 return EPOLLERR | EPOLLHUP;
    1160                 :          0 :         return 0;
    1161                 :            : }
    1162                 :            : 
    1163                 :          0 : static int hid_debug_events_release(struct inode *inode, struct file *file)
    1164                 :            : {
    1165                 :          0 :         struct hid_debug_list *list = file->private_data;
    1166                 :            :         unsigned long flags;
    1167                 :            : 
    1168                 :          0 :         spin_lock_irqsave(&list->hdev->debug_list_lock, flags);
    1169                 :            :         list_del(&list->node);
    1170                 :          0 :         spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags);
    1171                 :          0 :         kfifo_free(&list->hid_debug_fifo);
    1172                 :          0 :         kfree(list);
    1173                 :            : 
    1174                 :          0 :         return 0;
    1175                 :            : }
    1176                 :            : 
    1177                 :          0 : DEFINE_SHOW_ATTRIBUTE(hid_debug_rdesc);
    1178                 :            : 
    1179                 :            : static const struct file_operations hid_debug_events_fops = {
    1180                 :            :         .owner =        THIS_MODULE,
    1181                 :            :         .open           = hid_debug_events_open,
    1182                 :            :         .read           = hid_debug_events_read,
    1183                 :            :         .poll           = hid_debug_events_poll,
    1184                 :            :         .release        = hid_debug_events_release,
    1185                 :            :         .llseek         = noop_llseek,
    1186                 :            : };
    1187                 :            : 
    1188                 :            : 
    1189                 :          3 : void hid_debug_register(struct hid_device *hdev, const char *name)
    1190                 :            : {
    1191                 :          3 :         hdev->debug_dir = debugfs_create_dir(name, hid_debug_root);
    1192                 :          3 :         hdev->debug_rdesc = debugfs_create_file("rdesc", 0400,
    1193                 :            :                         hdev->debug_dir, hdev, &hid_debug_rdesc_fops);
    1194                 :          3 :         hdev->debug_events = debugfs_create_file("events", 0400,
    1195                 :            :                         hdev->debug_dir, hdev, &hid_debug_events_fops);
    1196                 :          3 :         hdev->debug = 1;
    1197                 :          3 : }
    1198                 :            : 
    1199                 :          0 : void hid_debug_unregister(struct hid_device *hdev)
    1200                 :            : {
    1201                 :          0 :         hdev->debug = 0;
    1202                 :          0 :         wake_up_interruptible(&hdev->debug_wait);
    1203                 :          0 :         debugfs_remove(hdev->debug_rdesc);
    1204                 :          0 :         debugfs_remove(hdev->debug_events);
    1205                 :          0 :         debugfs_remove(hdev->debug_dir);
    1206                 :          0 : }
    1207                 :            : 
    1208                 :          3 : void hid_debug_init(void)
    1209                 :            : {
    1210                 :          3 :         hid_debug_root = debugfs_create_dir("hid", NULL);
    1211                 :          3 : }
    1212                 :            : 
    1213                 :          0 : void hid_debug_exit(void)
    1214                 :            : {
    1215                 :          0 :         debugfs_remove_recursive(hid_debug_root);
    1216                 :          0 : }
    

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