// SPDX-License-Identifier: GPL-2.0-or-later /* * (c) 1999 Andreas Gal * (c) 2000-2001 Vojtech Pavlik * (c) 2007-2009 Jiri Kosina * * HID debugging support */ /* * * Should you need to contact me, the author, you can do so either by * e-mail - mail your message to , or by paper mail: * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include static struct dentry *hid_debug_root; struct hid_usage_entry { unsigned page; unsigned usage; const char *description; }; static const struct hid_usage_entry hid_usage_table[] = { { 0, 0, "Undefined" }, { 1, 0, "GenericDesktop" }, {0, 0x01, "Pointer"}, {0, 0x02, "Mouse"}, {0, 0x04, "Joystick"}, {0, 0x05, "GamePad"}, {0, 0x06, "Keyboard"}, {0, 0x07, "Keypad"}, {0, 0x08, "MultiAxis"}, {0, 0x30, "X"}, {0, 0x31, "Y"}, {0, 0x32, "Z"}, {0, 0x33, "Rx"}, {0, 0x34, "Ry"}, {0, 0x35, "Rz"}, {0, 0x36, "Slider"}, {0, 0x37, "Dial"}, {0, 0x38, "Wheel"}, {0, 0x39, "HatSwitch"}, {0, 0x3a, "CountedBuffer"}, {0, 0x3b, "ByteCount"}, {0, 0x3c, "MotionWakeup"}, {0, 0x3d, "Start"}, {0, 0x3e, "Select"}, {0, 0x40, "Vx"}, {0, 0x41, "Vy"}, {0, 0x42, "Vz"}, {0, 0x43, "Vbrx"}, {0, 0x44, "Vbry"}, {0, 0x45, "Vbrz"}, {0, 0x46, "Vno"}, {0, 0x80, "SystemControl"}, {0, 0x81, "SystemPowerDown"}, {0, 0x82, "SystemSleep"}, {0, 0x83, "SystemWakeUp"}, {0, 0x84, "SystemContextMenu"}, {0, 0x85, "SystemMainMenu"}, {0, 0x86, "SystemAppMenu"}, {0, 0x87, "SystemMenuHelp"}, {0, 0x88, "SystemMenuExit"}, {0, 0x89, "SystemMenuSelect"}, {0, 0x8a, "SystemMenuRight"}, {0, 0x8b, "SystemMenuLeft"}, {0, 0x8c, "SystemMenuUp"}, {0, 0x8d, "SystemMenuDown"}, {0, 0x90, "D-PadUp"}, {0, 0x91, "D-PadDown"}, {0, 0x92, "D-PadRight"}, {0, 0x93, "D-PadLeft"}, { 2, 0, "Simulation" }, {0, 0xb0, "Aileron"}, {0, 0xb1, "AileronTrim"}, {0, 0xb2, "Anti-Torque"}, {0, 0xb3, "Autopilot"}, {0, 0xb4, "Chaff"}, {0, 0xb5, "Collective"}, {0, 0xb6, "DiveBrake"}, {0, 0xb7, "ElectronicCountermeasures"}, {0, 0xb8, "Elevator"}, {0, 0xb9, "ElevatorTrim"}, {0, 0xba, "Rudder"}, {0, 0xbb, "Throttle"}, {0, 0xbc, "FlightCommunications"}, {0, 0xbd, "FlareRelease"}, {0, 0xbe, "LandingGear"}, {0, 0xbf, "ToeBrake"}, { 6, 0, "GenericDeviceControls" }, {0, 0x20, "BatteryStrength" }, {0, 0x21, "WirelessChannel" }, {0, 0x22, "WirelessID" }, {0, 0x23, "DiscoverWirelessControl" }, {0, 0x24, "SecurityCodeCharacterEntered" }, {0, 0x25, "SecurityCodeCharactedErased" }, {0, 0x26, "SecurityCodeCleared" }, { 7, 0, "Keyboard" }, { 8, 0, "LED" }, {0, 0x01, "NumLock"}, {0, 0x02, "CapsLock"}, {0, 0x03, "ScrollLock"}, {0, 0x04, "Compose"}, {0, 0x05, "Kana"}, {0, 0x4b, "GenericIndicator"}, { 9, 0, "Button" }, { 10, 0, "Ordinal" }, { 12, 0, "Consumer" }, {0, 0x003, "ProgrammableButtons"}, {0, 0x238, "HorizontalWheel"}, { 13, 0, "Digitizers" }, {0, 0x01, "Digitizer"}, {0, 0x02, "Pen"}, {0, 0x03, "LightPen"}, {0, 0x04, "TouchScreen"}, {0, 0x05, "TouchPad"}, {0, 0x0e, "DeviceConfiguration"}, {0, 0x20, "Stylus"}, {0, 0x21, "Puck"}, {0, 0x22, "Finger"}, {0, 0x23, "DeviceSettings"}, {0, 0x30, "TipPressure"}, {0, 0x31, "BarrelPressure"}, {0, 0x32, "InRange"}, {0, 0x33, "Touch"}, {0, 0x34, "UnTouch"}, {0, 0x35, "Tap"}, {0, 0x39, "TabletFunctionKey"}, {0, 0x3a, "ProgramChangeKey"}, {0, 0x3c, "Invert"}, {0, 0x42, "TipSwitch"}, {0, 0x43, "SecondaryTipSwitch"}, {0, 0x44, "BarrelSwitch"}, {0, 0x45, "Eraser"}, {0, 0x46, "TabletPick"}, {0, 0x47, "Confidence"}, {0, 0x48, "Width"}, {0, 0x49, "Height"}, {0, 0x51, "ContactID"}, {0, 0x52, "InputMode"}, {0, 0x53, "DeviceIndex"}, {0, 0x54, "ContactCount"}, {0, 0x55, "ContactMaximumNumber"}, {0, 0x59, "ButtonType"}, {0, 0x5A, "SecondaryBarrelSwitch"}, {0, 0x5B, "TransducerSerialNumber"}, { 15, 0, "PhysicalInterfaceDevice" }, {0, 0x00, "Undefined"}, {0, 0x01, "Physical_Interface_Device"}, {0, 0x20, "Normal"}, {0, 0x21, "Set_Effect_Report"}, {0, 0x22, "Effect_Block_Index"}, {0, 0x23, "Parameter_Block_Offset"}, {0, 0x24, "ROM_Flag"}, {0, 0x25, "Effect_Type"}, {0, 0x26, "ET_Constant_Force"}, {0, 0x27, "ET_Ramp"}, {0, 0x28, "ET_Custom_Force_Data"}, {0, 0x30, "ET_Square"}, {0, 0x31, "ET_Sine"}, {0, 0x32, "ET_Triangle"}, {0, 0x33, "ET_Sawtooth_Up"}, {0, 0x34, "ET_Sawtooth_Down"}, {0, 0x40, "ET_Spring"}, {0, 0x41, "ET_Damper"}, {0, 0x42, "ET_Inertia"}, {0, 0x43, "ET_Friction"}, {0, 0x50, "Duration"}, {0, 0x51, "Sample_Period"}, {0, 0x52, "Gain"}, {0, 0x53, "Trigger_Button"}, {0, 0x54, "Trigger_Repeat_Interval"}, {0, 0x55, "Axes_Enable"}, {0, 0x56, "Direction_Enable"}, {0, 0x57, "Direction"}, {0, 0x58, "Type_Specific_Block_Offset"}, {0, 0x59, "Block_Type"}, {0, 0x5A, "Set_Envelope_Report"}, {0, 0x5B, "Attack_Level"}, {0, 0x5C, "Attack_Time"}, {0, 0x5D, "Fade_Level"}, {0, 0x5E, "Fade_Time"}, {0, 0x5F, "Set_Condition_Report"}, {0, 0x60, "CP_Offset"}, {0, 0x61, "Positive_Coefficient"}, {0, 0x62, "Negative_Coefficient"}, {0, 0x63, "Positive_Saturation"}, {0, 0x64, "Negative_Saturation"}, {0, 0x65, "Dead_Band"}, {0, 0x66, "Download_Force_Sample"}, {0, 0x67, "Isoch_Custom_Force_Enable"}, {0, 0x68, "Custom_Force_Data_Report"}, {0, 0x69, "Custom_Force_Data"}, {0, 0x6A, "Custom_Force_Vendor_Defined_Data"}, {0, 0x6B, "Set_Custom_Force_Report"}, {0, 0x6C, "Custom_Force_Data_Offset"}, {0, 0x6D, "Sample_Count"}, {0, 0x6E, "Set_Periodic_Report"}, {0, 0x6F, "Offset"}, {0, 0x70, "Magnitude"}, {0, 0x71, "Phase"}, {0, 0x72, "Period"}, {0, 0x73, "Set_Constant_Force_Report"}, {0, 0x74, "Set_Ramp_Force_Report"}, {0, 0x75, "Ramp_Start"}, {0, 0x76, "Ramp_End"}, {0, 0x77, "Effect_Operation_Report"}, {0, 0x78, "Effect_Operation"}, {0, 0x79, "Op_Effect_Start"}, {0, 0x7A, "Op_Effect_Start_Solo"}, {0, 0x7B, "Op_Effect_Stop"}, {0, 0x7C, "Loop_Count"}, {0, 0x7D, "Device_Gain_Report"}, {0, 0x7E, "Device_Gain"}, {0, 0x7F, "PID_Pool_Report"}, {0, 0x80, "RAM_Pool_Size"}, {0, 0x81, "ROM_Pool_Size"}, {0, 0x82, "ROM_Effect_Block_Count"}, {0, 0x83, "Simultaneous_Effects_Max"}, {0, 0x84, "Pool_Alignment"}, {0, 0x85, "PID_Pool_Move_Report"}, {0, 0x86, "Move_Source"}, {0, 0x87, "Move_Destination"}, {0, 0x88, "Move_Length"}, {0, 0x89, "PID_Block_Load_Report"}, {0, 0x8B, "Block_Load_Status"}, {0, 0x8C, "Block_Load_Success"}, {0, 0x8D, "Block_Load_Full"}, {0, 0x8E, "Block_Load_Error"}, {0, 0x8F, "Block_Handle"}, {0, 0x90, "PID_Block_Free_Report"}, {0, 0x91, "Type_Specific_Block_Handle"}, {0, 0x92, "PID_State_Report"}, {0, 0x94, "Effect_Playing"}, {0, 0x95, "PID_Device_Control_Report"}, {0, 0x96, "PID_Device_Control"}, {0, 0x97, "DC_Enable_Actuators"}, {0, 0x98, "DC_Disable_Actuators"}, {0, 0x99, "DC_Stop_All_Effects"}, {0, 0x9A, "DC_Device_Reset"}, {0, 0x9B, "DC_Device_Pause"}, {0, 0x9C, "DC_Device_Continue"}, {0, 0x9F, "Device_Paused"}, {0, 0xA0, "Actuators_Enabled"}, {0, 0xA4, "Safety_Switch"}, {0, 0xA5, "Actuator_Override_Switch"}, {0, 0xA6, "Actuator_Power"}, {0, 0xA7, "Start_Delay"}, {0, 0xA8, "Parameter_Block_Size"}, {0, 0xA9, "Device_Managed_Pool"}, {0, 0xAA, "Shared_Parameter_Blocks"}, {0, 0xAB, "Create_New_Effect_Report"}, {0, 0xAC, "RAM_Pool_Available"}, { 0x20, 0, "Sensor" }, { 0x20, 0x01, "Sensor" }, { 0x20, 0x10, "Biometric" }, { 0x20, 0x11, "BiometricHumanPresence" }, { 0x20, 0x12, "BiometricHumanProximity" }, { 0x20, 0x13, "BiometricHumanTouch" }, { 0x20, 0x20, "Electrical" }, { 0x20, 0x21, "ElectricalCapacitance" }, { 0x20, 0x22, "ElectricalCurrent" }, { 0x20, 0x23, "ElectricalPower" }, { 0x20, 0x24, "ElectricalInductance" }, { 0x20, 0x25, "ElectricalResistance" }, { 0x20, 0x26, "ElectricalVoltage" }, { 0x20, 0x27, "ElectricalPoteniometer" }, { 0x20, 0x28, "ElectricalFrequency" }, { 0x20, 0x29, "ElectricalPeriod" }, { 0x20, 0x30, "Environmental" }, { 0x20, 0x31, "EnvironmentalAtmosphericPressure" }, { 0x20, 0x32, "EnvironmentalHumidity" }, { 0x20, 0x33, "EnvironmentalTemperature" }, { 0x20, 0x34, "EnvironmentalWindDirection" }, { 0x20, 0x35, "EnvironmentalWindSpeed" }, { 0x20, 0x40, "Light" }, { 0x20, 0x41, "LightAmbientLight" }, { 0x20, 0x42, "LightConsumerInfrared" }, { 0x20, 0x50, "Location" }, { 0x20, 0x51, "LocationBroadcast" }, { 0x20, 0x52, "LocationDeadReckoning" }, { 0x20, 0x53, "LocationGPS" }, { 0x20, 0x54, "LocationLookup" }, { 0x20, 0x55, "LocationOther" }, { 0x20, 0x56, "LocationStatic" }, { 0x20, 0x57, "LocationTriangulation" }, { 0x20, 0x60, "Mechanical" }, { 0x20, 0x61, "MechanicalBooleanSwitch" }, { 0x20, 0x62, "MechanicalBooleanSwitchArray" }, { 0x20, 0x63, "MechanicalMultivalueSwitch" }, { 0x20, 0x64, "MechanicalForce" }, { 0x20, 0x65, "MechanicalPressure" }, { 0x20, 0x66, "MechanicalStrain" }, { 0x20, 0x67, "MechanicalWeight" }, { 0x20, 0x68, "MechanicalHapticVibrator" }, { 0x20, 0x69, "MechanicalHallEffectSwitch" }, { 0x20, 0x70, "Motion" }, { 0x20, 0x71, "MotionAccelerometer1D" }, { 0x20, 0x72, "MotionAccelerometer2D" }, { 0x20, 0x73, "MotionAccelerometer3D" }, { 0x20, 0x74, "MotionGyrometer1D" }, { 0x20, 0x75, "MotionGyrometer2D" }, { 0x20, 0x76, "MotionGyrometer3D" }, { 0x20, 0x77, "MotionMotionDetector" }, { 0x20, 0x78, "MotionSpeedometer" }, { 0x20, 0x79, "MotionAccelerometer" }, { 0x20, 0x7A, "MotionGyrometer" }, { 0x20, 0x80, "Orientation" }, { 0x20, 0x81, "OrientationCompass1D" }, { 0x20, 0x82, "OrientationCompass2D" }, { 0x20, 0x83, "OrientationCompass3D" }, { 0x20, 0x84, "OrientationInclinometer1D" }, { 0x20, 0x85, "OrientationInclinometer2D" }, { 0x20, 0x86, "OrientationInclinometer3D" }, { 0x20, 0x87, "OrientationDistance1D" }, { 0x20, 0x88, "OrientationDistance2D" }, { 0x20, 0x89, "OrientationDistance3D" }, { 0x20, 0x8A, "OrientationDeviceOrientation" }, { 0x20, 0x8B, "OrientationCompass" }, { 0x20, 0x8C, "OrientationInclinometer" }, { 0x20, 0x8D, "OrientationDistance" }, { 0x20, 0x90, "Scanner" }, { 0x20, 0x91, "ScannerBarcode" }, { 0x20, 0x91, "ScannerRFID" }, { 0x20, 0x91, "ScannerNFC" }, { 0x20, 0xA0, "Time" }, { 0x20, 0xA1, "TimeAlarmTimer" }, { 0x20, 0xA2, "TimeRealTimeClock" }, { 0x20, 0xE0, "Other" }, { 0x20, 0xE1, "OtherCustom" }, { 0x20, 0xE2, "OtherGeneric" }, { 0x20, 0xE3, "OtherGenericEnumerator" }, { 0x84, 0, "Power Device" }, { 0x84, 0x02, "PresentStatus" }, { 0x84, 0x03, "ChangeStatus" }, { 0x84, 0x04, "UPS" }, { 0x84, 0x05, "PowerSupply" }, { 0x84, 0x10, "BatterySystem" }, { 0x84, 0x11, "BatterySystemID" }, { 0x84, 0x12, "Battery" }, { 0x84, 0x13, "BatteryID" }, { 0x84, 0x14, "Charger" }, { 0x84, 0x15, "ChargerID" }, { 0x84, 0x16, "PowerConverter" }, { 0x84, 0x17, "PowerConverterID" }, { 0x84, 0x18, "OutletSystem" }, { 0x84, 0x19, "OutletSystemID" }, { 0x84, 0x1a, "Input" }, { 0x84, 0x1b, "InputID" }, { 0x84, 0x1c, "Output" }, { 0x84, 0x1d, "OutputID" }, { 0x84, 0x1e, "Flow" }, { 0x84, 0x1f, "FlowID" }, { 0x84, 0x20, "Outlet" }, { 0x84, 0x21, "OutletID" }, { 0x84, 0x22, "Gang" }, { 0x84, 0x24, "PowerSummary" }, { 0x84, 0x25, "PowerSummaryID" }, { 0x84, 0x30, "Voltage" }, { 0x84, 0x31, "Current" }, { 0x84, 0x32, "Frequency" }, { 0x84, 0x33, "ApparentPower" }, { 0x84, 0x35, "PercentLoad" }, { 0x84, 0x40, "ConfigVoltage" }, { 0x84, 0x41, "ConfigCurrent" }, { 0x84, 0x43, "ConfigApparentPower" }, { 0x84, 0x53, "LowVoltageTransfer" }, { 0x84, 0x54, "HighVoltageTransfer" }, { 0x84, 0x56, "DelayBeforeStartup" }, { 0x84, 0x57, "DelayBeforeShutdown" }, { 0x84, 0x58, "Test" }, { 0x84, 0x5a, "AudibleAlarmControl" }, { 0x84, 0x60, "Present" }, { 0x84, 0x61, "Good" }, { 0x84, 0x62, "InternalFailure" }, { 0x84, 0x65, "Overload" }, { 0x84, 0x66, "OverCharged" }, { 0x84, 0x67, "OverTemperature" }, { 0x84, 0x68, "ShutdownRequested" }, { 0x84, 0x69, "ShutdownImminent" }, { 0x84, 0x6b, "SwitchOn/Off" }, { 0x84, 0x6c, "Switchable" }, { 0x84, 0x6d, "Used" }, { 0x84, 0x6e, "Boost" }, { 0x84, 0x73, "CommunicationLost" }, { 0x84, 0xfd, "iManufacturer" }, { 0x84, 0xfe, "iProduct" }, { 0x84, 0xff, "iSerialNumber" }, { 0x85, 0, "Battery System" }, { 0x85, 0x01, "SMBBatteryMode" }, { 0x85, 0x02, "SMBBatteryStatus" }, { 0x85, 0x03, "SMBAlarmWarning" }, { 0x85, 0x04, "SMBChargerMode" }, { 0x85, 0x05, "SMBChargerStatus" }, { 0x85, 0x06, "SMBChargerSpecInfo" }, { 0x85, 0x07, "SMBSelectorState" }, { 0x85, 0x08, "SMBSelectorPresets" }, { 0x85, 0x09, "SMBSelectorInfo" }, { 0x85, 0x29, "RemainingCapacityLimit" }, { 0x85, 0x2c, "CapacityMode" }, { 0x85, 0x42, "BelowRemainingCapacityLimit" }, { 0x85, 0x44, "Charging" }, { 0x85, 0x45, "Discharging" }, { 0x85, 0x4b, "NeedReplacement" }, { 0x85, 0x65, "AbsoluteStateOfCharge" }, { 0x85, 0x66, "RemainingCapacity" }, { 0x85, 0x68, "RunTimeToEmpty" }, { 0x85, 0x6a, "AverageTimeToFull" }, { 0x85, 0x83, "DesignCapacity" }, { 0x85, 0x85, "ManufacturerDate" }, { 0x85, 0x89, "iDeviceChemistry" }, { 0x85, 0x8b, "Rechargeable" }, { 0x85, 0x8f, "iOEMInformation" }, { 0x85, 0x8d, "CapacityGranularity1" }, { 0x85, 0xd0, "ACPresent" }, /* pages 0xff00 to 0xffff are vendor-specific */ { 0xffff, 0, "Vendor-specific-FF" }, { 0, 0, NULL } }; /* Either output directly into simple seq_file, or (if f == NULL) * allocate a separate buffer that will then be passed to the 'events' * ringbuffer. * * This is because these functions can be called both for "one-shot" * "rdesc" while resolving, or for blocking "events". * * This holds both for resolv_usage_page() and hid_resolv_usage(). */ static char *resolv_usage_page(unsigned page, struct seq_file *f) { const struct hid_usage_entry *p; char *buf = NULL; if (!f) { buf = kzalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC); if (!buf) return ERR_PTR(-ENOMEM); } for (p = hid_usage_table; p->description; p++) if (p->page == page) { if (!f) { snprintf(buf, HID_DEBUG_BUFSIZE, "%s", p->description); return buf; } else { seq_printf(f, "%s", p->description); return NULL; } } if (!f) snprintf(buf, HID_DEBUG_BUFSIZE, "%04x", page); else seq_printf(f, "%04x", page); return buf; } char *hid_resolv_usage(unsigned usage, struct seq_file *f) { const struct hid_usage_entry *p; char *buf = NULL; int len = 0; buf = resolv_usage_page(usage >> 16, f); if (IS_ERR(buf)) { pr_err("error allocating HID debug buffer\n"); return NULL; } if (!f) { len = strlen(buf); snprintf(buf+len, max(0, HID_DEBUG_BUFSIZE - len), "."); len++; } else { seq_printf(f, "."); } for (p = hid_usage_table; p->description; p++) if (p->page == (usage >> 16)) { for(++p; p->description && p->usage != 0; p++) if (p->usage == (usage & 0xffff)) { if (!f) snprintf(buf + len, max(0,HID_DEBUG_BUFSIZE - len - 1), "%s", p->description); else seq_printf(f, "%s", p->description); return buf; } break; } if (!f) snprintf(buf + len, max(0, HID_DEBUG_BUFSIZE - len - 1), "%04x", usage & 0xffff); else seq_printf(f, "%04x", usage & 0xffff); return buf; } EXPORT_SYMBOL_GPL(hid_resolv_usage); static void tab(int n, struct seq_file *f) { seq_printf(f, "%*s", n, ""); } void hid_dump_field(struct hid_field *field, int n, struct seq_file *f) { int j; if (field->physical) { tab(n, f); seq_printf(f, "Physical("); hid_resolv_usage(field->physical, f); seq_printf(f, ")\n"); } if (field->logical) { tab(n, f); seq_printf(f, "Logical("); hid_resolv_usage(field->logical, f); seq_printf(f, ")\n"); } if (field->application) { tab(n, f); seq_printf(f, "Application("); hid_resolv_usage(field->application, f); seq_printf(f, ")\n"); } tab(n, f); seq_printf(f, "Usage(%d)\n", field->maxusage); for (j = 0; j < field->maxusage; j++) { tab(n+2, f); hid_resolv_usage(field->usage[j].hid, f); seq_printf(f, "\n"); } if (field->logical_minimum != field->logical_maximum) { tab(n, f); seq_printf(f, "Logical Minimum(%d)\n", field->logical_minimum); tab(n, f); seq_printf(f, "Logical Maximum(%d)\n", field->logical_maximum); } if (field->physical_minimum != field->physical_maximum) { tab(n, f); seq_printf(f, "Physical Minimum(%d)\n", field->physical_minimum); tab(n, f); seq_printf(f, "Physical Maximum(%d)\n", field->physical_maximum); } if (field->unit_exponent) { tab(n, f); seq_printf(f, "Unit Exponent(%d)\n", field->unit_exponent); } if (field->unit) { static const char *systems[5] = { "None", "SI Linear", "SI Rotation", "English Linear", "English Rotation" }; static const char *units[5][8] = { { "None", "None", "None", "None", "None", "None", "None", "None" }, { "None", "Centimeter", "Gram", "Seconds", "Kelvin", "Ampere", "Candela", "None" }, { "None", "Radians", "Gram", "Seconds", "Kelvin", "Ampere", "Candela", "None" }, { "None", "Inch", "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" }, { "None", "Degrees", "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" } }; int i; int sys; __u32 data = field->unit; /* First nibble tells us which system we're in. */ sys = data & 0xf; data >>= 4; if(sys > 4) { tab(n, f); seq_printf(f, "Unit(Invalid)\n"); } else { int earlier_unit = 0; tab(n, f); seq_printf(f, "Unit(%s : ", systems[sys]); for (i=1 ; i>= 4; if (nibble != 0) { if(earlier_unit++ > 0) seq_printf(f, "*"); seq_printf(f, "%s", units[sys][i]); if(nibble != 1) { /* This is a _signed_ nibble(!) */ int val = nibble & 0x7; if(nibble & 0x08) val = -((0x7 & ~val) +1); seq_printf(f, "^%d", val); } } } seq_printf(f, ")\n"); } } tab(n, f); seq_printf(f, "Report Size(%u)\n", field->report_size); tab(n, f); seq_printf(f, "Report Count(%u)\n", field->report_count); tab(n, f); seq_printf(f, "Report Offset(%u)\n", field->report_offset); tab(n, f); seq_printf(f, "Flags( "); j = field->flags; seq_printf(f, "%s", HID_MAIN_ITEM_CONSTANT & j ? "Constant " : ""); seq_printf(f, "%s", HID_MAIN_ITEM_VARIABLE & j ? "Variable " : "Array "); seq_printf(f, "%s", HID_MAIN_ITEM_RELATIVE & j ? "Relative " : "Absolute "); seq_printf(f, "%s", HID_MAIN_ITEM_WRAP & j ? "Wrap " : ""); seq_printf(f, "%s", HID_MAIN_ITEM_NONLINEAR & j ? "NonLinear " : ""); seq_printf(f, "%s", HID_MAIN_ITEM_NO_PREFERRED & j ? "NoPreferredState " : ""); seq_printf(f, "%s", HID_MAIN_ITEM_NULL_STATE & j ? "NullState " : ""); seq_printf(f, "%s", HID_MAIN_ITEM_VOLATILE & j ? "Volatile " : ""); seq_printf(f, "%s", HID_MAIN_ITEM_BUFFERED_BYTE & j ? "BufferedByte " : ""); seq_printf(f, ")\n"); } EXPORT_SYMBOL_GPL(hid_dump_field); void hid_dump_device(struct hid_device *device, struct seq_file *f) { struct hid_report_enum *report_enum; struct hid_report *report; struct list_head *list; unsigned i,k; static const char *table[] = {"INPUT", "OUTPUT", "FEATURE"}; for (i = 0; i < HID_REPORT_TYPES; i++) { report_enum = device->report_enum + i; list = report_enum->report_list.next; while (list != &report_enum->report_list) { report = (struct hid_report *) list; tab(2, f); seq_printf(f, "%s", table[i]); if (report->id) seq_printf(f, "(%d)", report->id); seq_printf(f, "[%s]", table[report->type]); seq_printf(f, "\n"); for (k = 0; k < report->maxfield; k++) { tab(4, f); seq_printf(f, "Field(%d)\n", k); hid_dump_field(report->field[k], 6, f); } list = list->next; } } } EXPORT_SYMBOL_GPL(hid_dump_device); /* enqueue string to 'events' ring buffer */ void hid_debug_event(struct hid_device *hdev, char *buf) { struct hid_debug_list *list; unsigned long flags; spin_lock_irqsave(&hdev->debug_list_lock, flags); list_for_each_entry(list, &hdev->debug_list, node) kfifo_in(&list->hid_debug_fifo, buf, strlen(buf)); spin_unlock_irqrestore(&hdev->debug_list_lock, flags); wake_up_interruptible(&hdev->debug_wait); } EXPORT_SYMBOL_GPL(hid_debug_event); void hid_dump_report(struct hid_device *hid, int type, u8 *data, int size) { struct hid_report_enum *report_enum; char *buf; unsigned int i; buf = kmalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC); if (!buf) return; report_enum = hid->report_enum + type; /* dump the report */ snprintf(buf, HID_DEBUG_BUFSIZE - 1, "\nreport (size %u) (%snumbered) = ", size, report_enum->numbered ? "" : "un"); hid_debug_event(hid, buf); for (i = 0; i < size; i++) { snprintf(buf, HID_DEBUG_BUFSIZE - 1, " %02x", data[i]); hid_debug_event(hid, buf); } hid_debug_event(hid, "\n"); kfree(buf); } EXPORT_SYMBOL_GPL(hid_dump_report); void hid_dump_input(struct hid_device *hdev, struct hid_usage *usage, __s32 value) { char *buf; int len; buf = hid_resolv_usage(usage->hid, NULL); if (!buf) return; len = strlen(buf); snprintf(buf + len, HID_DEBUG_BUFSIZE - len - 1, " = %d\n", value); hid_debug_event(hdev, buf); kfree(buf); wake_up_interruptible(&hdev->debug_wait); } EXPORT_SYMBOL_GPL(hid_dump_input); static const char *events[EV_MAX + 1] = { [EV_SYN] = "Sync", [EV_KEY] = "Key", [EV_REL] = "Relative", [EV_ABS] = "Absolute", [EV_MSC] = "Misc", [EV_LED] = "LED", [EV_SND] = "Sound", [EV_REP] = "Repeat", [EV_FF] = "ForceFeedback", [EV_PWR] = "Power", [EV_FF_STATUS] = "ForceFeedbackStatus", }; static const char *syncs[3] = { [SYN_REPORT] = "Report", [SYN_CONFIG] = "Config", [SYN_MT_REPORT] = "MT Report", }; static const char *keys[KEY_MAX + 1] = { [KEY_RESERVED] = "Reserved", [KEY_ESC] = "Esc", [KEY_1] = "1", [KEY_2] = "2", [KEY_3] = "3", [KEY_4] = "4", [KEY_5] = "5", [KEY_6] = "6", [KEY_7] = "7", [KEY_8] = "8", [KEY_9] = "9", [KEY_0] = "0", [KEY_MINUS] = "Minus", [KEY_EQUAL] = "Equal", [KEY_BACKSPACE] = "Backspace", [KEY_TAB] = "Tab", [KEY_Q] = "Q", [KEY_W] = "W", [KEY_E] = "E", [KEY_R] = "R", [KEY_T] = "T", [KEY_Y] = "Y", [KEY_U] = "U", [KEY_I] = "I", [KEY_O] = "O", [KEY_P] = "P", [KEY_LEFTBRACE] = "LeftBrace", [KEY_RIGHTBRACE] = "RightBrace", [KEY_ENTER] = "Enter", [KEY_LEFTCTRL] = "LeftControl", [KEY_A] = "A", [KEY_S] = "S", [KEY_D] = "D", [KEY_F] = "F", [KEY_G] = "G", [KEY_H] = "H", [KEY_J] = "J", [KEY_K] = "K", [KEY_L] = "L", [KEY_SEMICOLON] = "Semicolon", [KEY_APOSTROPHE] = "Apostrophe", [KEY_GRAVE] = "Grave", [KEY_LEFTSHIFT] = "LeftShift", [KEY_BACKSLASH] = "BackSlash", [KEY_Z] = "Z", [KEY_X] = "X", [KEY_C] = "C", [KEY_V] = "V", [KEY_B] = "B", [KEY_N] = "N", [KEY_M] = "M", [KEY_COMMA] = "Comma", [KEY_DOT] = "Dot", [KEY_SLASH] = "Slash", [KEY_RIGHTSHIFT] = "RightShift", [KEY_KPASTERISK] = "KPAsterisk", [KEY_LEFTALT] = "LeftAlt", [KEY_SPACE] = "Space", [KEY_CAPSLOCK] = "CapsLock", [KEY_F1] = "F1", [KEY_F2] = "F2", [KEY_F3] = "F3", [KEY_F4] = "F4", [KEY_F5] = "F5", [KEY_F6] = "F6", [KEY_F7] = "F7", [KEY_F8] = "F8", [KEY_F9] = "F9", [KEY_F10] = "F10", [KEY_NUMLOCK] = "NumLock", [KEY_SCROLLLOCK] = "ScrollLock", [KEY_KP7] = "KP7", [KEY_KP8] = "KP8", [KEY_KP9] = "KP9", [KEY_KPMINUS] = "KPMinus", [KEY_KP4] = "KP4", [KEY_KP5] = "KP5", [KEY_KP6] = "KP6", [KEY_KPPLUS] = "KPPlus", [KEY_KP1] = "KP1", [KEY_KP2] = "KP2", [KEY_KP3] = "KP3", [KEY_KP0] = "KP0", [KEY_KPDOT] = "KPDot", [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd", [KEY_F11] = "F11", [KEY_F12] = "F12", [KEY_RO] = "RO", [KEY_KATAKANA] = "Katakana", [KEY_HIRAGANA] = "HIRAGANA", [KEY_HENKAN] = "Henkan", [KEY_KATAKANAHIRAGANA] = "Katakana/Hiragana", [KEY_MUHENKAN] = "Muhenkan", [KEY_KPJPCOMMA] = "KPJpComma", [KEY_KPENTER] = "KPEnter", [KEY_RIGHTCTRL] = "RightCtrl", [KEY_KPSLASH] = "KPSlash", [KEY_SYSRQ] = "SysRq", [KEY_RIGHTALT] = "RightAlt", [KEY_LINEFEED] = "LineFeed", [KEY_HOME] = "Home", [KEY_UP] = "Up", [KEY_PAGEUP] = "PageUp", [KEY_LEFT] = "Left", [KEY_RIGHT] = "Right", [KEY_END] = "End", [KEY_DOWN] = "Down", [KEY_PAGEDOWN] = "PageDown", [KEY_INSERT] = "Insert", [KEY_DELETE] = "Delete", [KEY_MACRO] = "Macro", [KEY_MUTE] = "Mute", [KEY_VOLUMEDOWN] = "VolumeDown", [KEY_VOLUMEUP] = "VolumeUp", [KEY_POWER] = "Power", [KEY_KPEQUAL] = "KPEqual", [KEY_KPPLUSMINUS] = "KPPlusMinus", [KEY_PAUSE] = "Pause", [KEY_KPCOMMA] = "KPComma", [KEY_HANGUEL] = "Hangeul", [KEY_HANJA] = "Hanja", [KEY_YEN] = "Yen", [KEY_LEFTMETA] = "LeftMeta", [KEY_RIGHTMETA] = "RightMeta", [KEY_COMPOSE] = "Compose", [KEY_STOP] = "Stop", [KEY_AGAIN] = "Again", [KEY_PROPS] = "Props", [KEY_UNDO] = "Undo", [KEY_FRONT] = "Front", [KEY_COPY] = "Copy", [KEY_OPEN] = "Open", [KEY_PASTE] = "Paste", [KEY_FIND] = "Find", [KEY_CUT] = "Cut", [KEY_HELP] = "Help", [KEY_MENU] = "Menu", [KEY_CALC] = "Calc", [KEY_SETUP] = "Setup", [KEY_SLEEP] = "Sleep", [KEY_WAKEUP] = "WakeUp", [KEY_FILE] = "File", [KEY_SENDFILE] = "SendFile", [KEY_DELETEFILE] = "DeleteFile", [KEY_XFER] = "X-fer", [KEY_PROG1] = "Prog1", [KEY_PROG2] = "Prog2", [KEY_WWW] = "WWW", [KEY_MSDOS] = "MSDOS", [KEY_COFFEE] = "Coffee", [KEY_ROTATE_DISPLAY] = "RotateDisplay", [KEY_CYCLEWINDOWS] = "CycleWindows", [KEY_MAIL] = "Mail", [KEY_BOOKMARKS] = "Bookmarks", [KEY_COMPUTER] = "Computer", [KEY_BACK] = "Back", [KEY_FORWARD] = "Forward", [KEY_CLOSECD] = "CloseCD", [KEY_EJECTCD] = "EjectCD", [KEY_EJECTCLOSECD] = "EjectCloseCD", [KEY_NEXTSONG] = "NextSong", [KEY_PLAYPAUSE] = "PlayPause", [KEY_PREVIOUSSONG] = "PreviousSong", [KEY_STOPCD] = "StopCD", [KEY_RECORD] = "Record", [KEY_REWIND] = "Rewind", [KEY_PHONE] = "Phone", [KEY_ISO] = "ISOKey", [KEY_CONFIG] = "Config", [KEY_HOMEPAGE] = "HomePage", [KEY_REFRESH] = "Refresh", [KEY_EXIT] = "Exit", [KEY_MOVE] = "Move", [KEY_EDIT] = "Edit", [KEY_SCROLLUP] = "ScrollUp", [KEY_SCROLLDOWN] = "ScrollDown", [KEY_KPLEFTPAREN] = "KPLeftParenthesis", [KEY_KPRIGHTPAREN] = "KPRightParenthesis", [KEY_NEW] = "New", [KEY_REDO] = "Redo", [KEY_F13] = "F13", [KEY_F14] = "F14", [KEY_F15] = "F15", [KEY_F16] = "F16", [KEY_F17] = "F17", [KEY_F18] = "F18", [KEY_F19] = "F19", [KEY_F20] = "F20", [KEY_F21] = "F21", [KEY_F22] = "F22", [KEY_F23] = "F23", [KEY_F24] = "F24", [KEY_PLAYCD] = "PlayCD", [KEY_PAUSECD] = "PauseCD", [KEY_PROG3] = "Prog3", [KEY_PROG4] = "Prog4", [KEY_ALL_APPLICATIONS] = "AllApplications", [KEY_SUSPEND] = "Suspend", [KEY_CLOSE] = "Close", [KEY_PLAY] = "Play", [KEY_FASTFORWARD] = "FastForward", [KEY_BASSBOOST] = "BassBoost", [KEY_PRINT] = "Print", [KEY_HP] = "HP", [KEY_CAMERA] = "Camera", [KEY_SOUND] = "Sound", [KEY_QUESTION] = "Question", [KEY_EMAIL] = "Email", [KEY_CHAT] = "Chat", [KEY_SEARCH] = "Search", [KEY_CONNECT] = "Connect", [KEY_FINANCE] = "Finance", [KEY_SPORT] = "Sport", [KEY_SHOP] = "Shop", [KEY_ALTERASE] = "AlternateErase", [KEY_CANCEL] = "Cancel", [KEY_BRIGHTNESSDOWN] = "BrightnessDown", [KEY_BRIGHTNESSUP] = "BrightnessUp", [KEY_MEDIA] = "Media", [KEY_UNKNOWN] = "Unknown", [BTN_DPAD_UP] = "BtnDPadUp", [BTN_DPAD_DOWN] = "BtnDPadDown", [BTN_DPAD_LEFT] = "BtnDPadLeft", [BTN_DPAD_RIGHT] = "BtnDPadRight", [BTN_0] = "Btn0", [BTN_1] = "Btn1", [BTN_2] = "Btn2", [BTN_3] = "Btn3", [BTN_4] = "Btn4", [BTN_5] = "Btn5", [BTN_6] = "Btn6", [BTN_7] = "Btn7", [BTN_8] = "Btn8", [BTN_9] = "Btn9", [BTN_LEFT] = "LeftBtn", [BTN_RIGHT] = "RightBtn", [BTN_MIDDLE] = "MiddleBtn", [BTN_SIDE] = "SideBtn", [BTN_EXTRA] = "ExtraBtn", [BTN_FORWARD] = "ForwardBtn", [BTN_BACK] = "BackBtn", [BTN_TASK] = "TaskBtn", [BTN_TRIGGER] = "Trigger", [BTN_THUMB] = "ThumbBtn", [BTN_THUMB2] = "ThumbBtn2", [BTN_TOP] = "TopBtn", [BTN_TOP2] = "TopBtn2", [BTN_PINKIE] = "PinkieBtn", [BTN_BASE] = "BaseBtn", [BTN_BASE2] = "BaseBtn2", [BTN_BASE3] = "BaseBtn3", [BTN_BASE4] = "BaseBtn4", [BTN_BASE5] = "BaseBtn5", [BTN_BASE6] = "BaseBtn6", [BTN_DEAD] = "BtnDead", [BTN_A] = "BtnA", [BTN_B] = "BtnB", [BTN_C] = "BtnC", [BTN_X] = "BtnX", [BTN_Y] = "BtnY", [BTN_Z] = "BtnZ", [BTN_TL] = "BtnTL", [BTN_TR] = "BtnTR", [BTN_TL2] = "BtnTL2", [BTN_TR2] = "BtnTR2", [BTN_SELECT] = "BtnSelect", [BTN_START] = "BtnStart", [BTN_MODE] = "BtnMode", [BTN_THUMBL] = "BtnThumbL", [BTN_THUMBR] = "BtnThumbR", [BTN_TOOL_PEN] = "ToolPen", [BTN_TOOL_RUBBER] = "ToolRubber", [BTN_TOOL_BRUSH] = "ToolBrush", [BTN_TOOL_PENCIL] = "ToolPencil", [BTN_TOOL_AIRBRUSH] = "ToolAirbrush", [BTN_TOOL_FINGER] = "ToolFinger", [BTN_TOOL_MOUSE] = "ToolMouse", [BTN_TOOL_LENS] = "ToolLens", [BTN_TOUCH] = "Touch", [BTN_STYLUS] = "Stylus", [BTN_STYLUS2] = "Stylus2", [BTN_TOOL_DOUBLETAP] = "ToolDoubleTap", [BTN_TOOL_TRIPLETAP] = "ToolTripleTap", [BTN_TOOL_QUADTAP] = "ToolQuadrupleTap", [BTN_GEAR_DOWN] = "WheelBtn", [BTN_GEAR_UP] = "Gear up", [KEY_OK] = "Ok", [KEY_SELECT] = "Select", [KEY_GOTO] = "Goto", [KEY_CLEAR] = "Clear", [KEY_POWER2] = "Power2", [KEY_OPTION] = "Option", [KEY_INFO] = "Info", [KEY_TIME] = "Time", [KEY_VENDOR] = "Vendor", [KEY_ARCHIVE] = "Archive", [KEY_PROGRAM] = "Program", [KEY_CHANNEL] = "Channel", [KEY_FAVORITES] = "Favorites", [KEY_EPG] = "EPG", [KEY_PVR] = "PVR", [KEY_MHP] = "MHP", [KEY_LANGUAGE] = "Language", [KEY_TITLE] = "Title", [KEY_SUBTITLE] = "Subtitle", [KEY_ANGLE] = "Angle", [KEY_ZOOM] = "Zoom", [KEY_MODE] = "Mode", [KEY_KEYBOARD] = "Keyboard", [KEY_SCREEN] = "Screen", [KEY_PC] = "PC", [KEY_TV] = "TV", [KEY_TV2] = "TV2", [KEY_VCR] = "VCR", [KEY_VCR2] = "VCR2", [KEY_SAT] = "Sat", [KEY_SAT2] = "Sat2", [KEY_CD] = "CD", [KEY_TAPE] = "Tape", [KEY_RADIO] = "Radio", [KEY_TUNER] = "Tuner", [KEY_PLAYER] = "Player", [KEY_TEXT] = "Text", [KEY_DVD] = "DVD", [KEY_AUX] = "Aux", [KEY_MP3] = "MP3", [KEY_AUDIO] = "Audio", [KEY_VIDEO] = "Video", [KEY_DIRECTORY] = "Directory", [KEY_LIST] = "List", [KEY_MEMO] = "Memo", [KEY_CALENDAR] = "Calendar", [KEY_RED] = "Red", [KEY_GREEN] = "Green", [KEY_YELLOW] = "Yellow", [KEY_BLUE] = "Blue", [KEY_CHANNELUP] = "ChannelUp", [KEY_CHANNELDOWN] = "ChannelDown", [KEY_FIRST] = "First", [KEY_LAST] = "Last", [KEY_AB] = "AB", [KEY_NEXT] = "Next", [KEY_RESTART] = "Restart", [KEY_SLOW] = "Slow", [KEY_SHUFFLE] = "Shuffle", [KEY_BREAK] = "Break", [KEY_PREVIOUS] = "Previous", [KEY_DIGITS] = "Digits", [KEY_TEEN] = "TEEN", [KEY_TWEN] = "TWEN", [KEY_DEL_EOL] = "DeleteEOL", [KEY_DEL_EOS] = "DeleteEOS", [KEY_INS_LINE] = "InsertLine", [KEY_DEL_LINE] = "DeleteLine", [KEY_SEND] = "Send", [KEY_REPLY] = "Reply", [KEY_FORWARDMAIL] = "ForwardMail", [KEY_SAVE] = "Save", [KEY_DOCUMENTS] = "Documents", [KEY_SPELLCHECK] = "SpellCheck", [KEY_LOGOFF] = "Logoff", [KEY_FN] = "Fn", [KEY_FN_ESC] = "Fn+ESC", [KEY_FN_1] = "Fn+1", [KEY_FN_2] = "Fn+2", [KEY_FN_B] = "Fn+B", [KEY_FN_D] = "Fn+D", [KEY_FN_E] = "Fn+E", [KEY_FN_F] = "Fn+F", [KEY_FN_S] = "Fn+S", [KEY_FN_F1] = "Fn+F1", [KEY_FN_F2] = "Fn+F2", [KEY_FN_F3] = "Fn+F3", [KEY_FN_F4] = "Fn+F4", [KEY_FN_F5] = "Fn+F5", [KEY_FN_F6] = "Fn+F6", [KEY_FN_F7] = "Fn+F7", [KEY_FN_F8] = "Fn+F8", [KEY_FN_F9] = "Fn+F9", [KEY_FN_F10] = "Fn+F10", [KEY_FN_F11] = "Fn+F11", [KEY_FN_F12] = "Fn+F12", [KEY_KBDILLUMTOGGLE] = "KbdIlluminationToggle", [KEY_KBDILLUMDOWN] = "KbdIlluminationDown", [KEY_KBDILLUMUP] = "KbdIlluminationUp", [KEY_SWITCHVIDEOMODE] = "SwitchVideoMode", [KEY_BUTTONCONFIG] = "ButtonConfig", [KEY_TASKMANAGER] = "TaskManager", [KEY_JOURNAL] = "Journal", [KEY_CONTROLPANEL] = "ControlPanel", [KEY_APPSELECT] = "AppSelect", [KEY_SCREENSAVER] = "ScreenSaver", [KEY_VOICECOMMAND] = "VoiceCommand", [KEY_ASSISTANT] = "Assistant", [KEY_KBD_LAYOUT_NEXT] = "KbdLayoutNext", [KEY_EMOJI_PICKER] = "EmojiPicker", [KEY_DICTATE] = "Dictate", [KEY_MICMUTE] = "MicrophoneMute", [KEY_BRIGHTNESS_MIN] = "BrightnessMin", [KEY_BRIGHTNESS_MAX] = "BrightnessMax", [KEY_BRIGHTNESS_AUTO] = "BrightnessAuto", [KEY_KBDINPUTASSIST_PREV] = "KbdInputAssistPrev", [KEY_KBDINPUTASSIST_NEXT] = "KbdInputAssistNext", [KEY_KBDINPUTASSIST_PREVGROUP] = "KbdInputAssistPrevGroup", [KEY_KBDINPUTASSIST_NEXTGROUP] = "KbdInputAssistNextGroup", [KEY_KBDINPUTASSIST_ACCEPT] = "KbdInputAssistAccept", [KEY_KBDINPUTASSIST_CANCEL] = "KbdInputAssistCancel", [KEY_MACRO1] = "Macro1", [KEY_MACRO2] = "Macro2", [KEY_MACRO3] = "Macro3", [KEY_MACRO4] = "Macro4", [KEY_MACRO5] = "Macro5", [KEY_MACRO6] = "Macro6", [KEY_MACRO7] = "Macro7", [KEY_MACRO8] = "Macro8", [KEY_MACRO9] = "Macro9", [KEY_MACRO10] = "Macro10", [KEY_MACRO11] = "Macro11", [KEY_MACRO12] = "Macro12", [KEY_MACRO13] = "Macro13", [KEY_MACRO14] = "Macro14", [KEY_MACRO15] = "Macro15", [KEY_MACRO16] = "Macro16", [KEY_MACRO17] = "Macro17", [KEY_MACRO18] = "Macro18", [KEY_MACRO19] = "Macro19", [KEY_MACRO20] = "Macro20", [KEY_MACRO21] = "Macro21", [KEY_MACRO22] = "Macro22", [KEY_MACRO23] = "Macro23", [KEY_MACRO24] = "Macro24", [KEY_MACRO25] = "Macro25", [KEY_MACRO26] = "Macro26", [KEY_MACRO27] = "Macro27", [KEY_MACRO28] = "Macro28", [KEY_MACRO29] = "Macro29", [KEY_MACRO30] = "Macro30", }; static const char *relatives[REL_MAX + 1] = { [REL_X] = "X", [REL_Y] = "Y", [REL_Z] = "Z", [REL_RX] = "Rx", [REL_RY] = "Ry", [REL_RZ] = "Rz", [REL_HWHEEL] = "HWheel", [REL_DIAL] = "Dial", [REL_WHEEL] = "Wheel", [REL_MISC] = "Misc", }; static const char *absolutes[ABS_CNT] = { [ABS_X] = "X", [ABS_Y] = "Y", [ABS_Z] = "Z", [ABS_RX] = "Rx", [ABS_RY] = "Ry", [ABS_RZ] = "Rz", [ABS_THROTTLE] = "Throttle", [ABS_RUDDER] = "Rudder", [ABS_WHEEL] = "Wheel", [ABS_GAS] = "Gas", [ABS_BRAKE] = "Brake", [ABS_HAT0X] = "Hat0X", [ABS_HAT0Y] = "Hat0Y", [ABS_HAT1X] = "Hat1X", [ABS_HAT1Y] = "Hat1Y", [ABS_HAT2X] = "Hat2X", [ABS_HAT2Y] = "Hat2Y", [ABS_HAT3X] = "Hat3X", [ABS_HAT3Y] = "Hat 3Y", [ABS_PRESSURE] = "Pressure", [ABS_DISTANCE] = "Distance", [ABS_TILT_X] = "XTilt", [ABS_TILT_Y] = "YTilt", [ABS_TOOL_WIDTH] = "ToolWidth", [ABS_VOLUME] = "Volume", [ABS_MISC] = "Misc", [ABS_MT_TOUCH_MAJOR] = "MTMajor", [ABS_MT_TOUCH_MINOR] = "MTMinor", [ABS_MT_WIDTH_MAJOR] = "MTMajorW", [ABS_MT_WIDTH_MINOR] = "MTMinorW", [ABS_MT_ORIENTATION] = "MTOrientation", [ABS_MT_POSITION_X] = "MTPositionX", [ABS_MT_POSITION_Y] = "MTPositionY", [ABS_MT_TOOL_TYPE] = "MTToolType", [ABS_MT_BLOB_ID] = "MTBlobID", }; static const char *misc[MSC_MAX + 1] = { [MSC_SERIAL] = "Serial", [MSC_PULSELED] = "Pulseled", [MSC_GESTURE] = "Gesture", [MSC_RAW] = "RawData" }; static const char *leds[LED_MAX + 1] = { [LED_NUML] = "NumLock", [LED_CAPSL] = "CapsLock", [LED_SCROLLL] = "ScrollLock", [LED_COMPOSE] = "Compose", [LED_KANA] = "Kana", [LED_SLEEP] = "Sleep", [LED_SUSPEND] = "Suspend", [LED_MUTE] = "Mute", [LED_MISC] = "Misc", }; static const char *repeats[REP_MAX + 1] = { [REP_DELAY] = "Delay", [REP_PERIOD] = "Period" }; static const char *sounds[SND_MAX + 1] = { [SND_CLICK] = "Click", [SND_BELL] = "Bell", [SND_TONE] = "Tone" }; static const char **names[EV_MAX + 1] = { [EV_SYN] = syncs, [EV_KEY] = keys, [EV_REL] = relatives, [EV_ABS] = absolutes, [EV_MSC] = misc, [EV_LED] = leds, [EV_SND] = sounds, [EV_REP] = repeats, }; static void hid_resolv_event(__u8 type, __u16 code, struct seq_file *f) { seq_printf(f, "%s.%s", events[type] ? events[type] : "?", names[type] ? (names[type][code] ? names[type][code] : "?") : "?"); } static void hid_dump_input_mapping(struct hid_device *hid, struct seq_file *f) { int i, j, k; struct hid_report *report; struct hid_usage *usage; for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { list_for_each_entry(report, &hid->report_enum[k].report_list, list) { for (i = 0; i < report->maxfield; i++) { for ( j = 0; j < report->field[i]->maxusage; j++) { usage = report->field[i]->usage + j; hid_resolv_usage(usage->hid, f); seq_printf(f, " ---> "); hid_resolv_event(usage->type, usage->code, f); seq_printf(f, "\n"); } } } } } static int hid_debug_rdesc_show(struct seq_file *f, void *p) { struct hid_device *hdev = f->private; const __u8 *rdesc = hdev->rdesc; unsigned rsize = hdev->rsize; int i; if (!rdesc) { rdesc = hdev->dev_rdesc; rsize = hdev->dev_rsize; } /* dump HID report descriptor */ for (i = 0; i < rsize; i++) seq_printf(f, "%02x ", rdesc[i]); seq_printf(f, "\n\n"); /* dump parsed data and input mappings */ if (down_interruptible(&hdev->driver_input_lock)) return 0; hid_dump_device(hdev, f); seq_printf(f, "\n"); hid_dump_input_mapping(hdev, f); up(&hdev->driver_input_lock); return 0; } static int hid_debug_events_open(struct inode *inode, struct file *file) { int err = 0; struct hid_debug_list *list; unsigned long flags; if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) { err = -ENOMEM; goto out; } err = kfifo_alloc(&list->hid_debug_fifo, HID_DEBUG_FIFOSIZE, GFP_KERNEL); if (err) { kfree(list); goto out; } list->hdev = (struct hid_device *) inode->i_private; kref_get(&list->hdev->ref); file->private_data = list; mutex_init(&list->read_mutex); spin_lock_irqsave(&list->hdev->debug_list_lock, flags); list_add_tail(&list->node, &list->hdev->debug_list); spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); out: return err; } static ssize_t hid_debug_events_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) { struct hid_debug_list *list = file->private_data; int ret = 0, copied; DECLARE_WAITQUEUE(wait, current); mutex_lock(&list->read_mutex); if (kfifo_is_empty(&list->hid_debug_fifo)) { add_wait_queue(&list->hdev->debug_wait, &wait); set_current_state(TASK_INTERRUPTIBLE); while (kfifo_is_empty(&list->hid_debug_fifo)) { if (signal_pending(current)) { ret = -ERESTARTSYS; break; } /* if list->hdev is NULL we cannot remove_wait_queue(). * if list->hdev->debug is 0 then hid_debug_unregister() * was already called and list->hdev is being destroyed. * if we add remove_wait_queue() here we can hit a race. */ if (!list->hdev || !list->hdev->debug) { ret = -EIO; set_current_state(TASK_RUNNING); goto out; } if (file->f_flags & O_NONBLOCK) { ret = -EAGAIN; break; } /* allow O_NONBLOCK from other threads */ mutex_unlock(&list->read_mutex); schedule(); mutex_lock(&list->read_mutex); set_current_state(TASK_INTERRUPTIBLE); } __set_current_state(TASK_RUNNING); remove_wait_queue(&list->hdev->debug_wait, &wait); if (ret) goto out; } /* pass the fifo content to userspace, locking is not needed with only * one concurrent reader and one concurrent writer */ ret = kfifo_to_user(&list->hid_debug_fifo, buffer, count, &copied); if (ret) goto out; ret = copied; out: mutex_unlock(&list->read_mutex); return ret; } static __poll_t hid_debug_events_poll(struct file *file, poll_table *wait) { struct hid_debug_list *list = file->private_data; poll_wait(file, &list->hdev->debug_wait, wait); if (!kfifo_is_empty(&list->hid_debug_fifo)) return EPOLLIN | EPOLLRDNORM; if (!list->hdev->debug) return EPOLLERR | EPOLLHUP; return 0; } static int hid_debug_events_release(struct inode *inode, struct file *file) { struct hid_debug_list *list = file->private_data; unsigned long flags; spin_lock_irqsave(&list->hdev->debug_list_lock, flags); list_del(&list->node); spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); kfifo_free(&list->hid_debug_fifo); kref_put(&list->hdev->ref, hiddev_free); kfree(list); return 0; } DEFINE_SHOW_ATTRIBUTE(hid_debug_rdesc); static const struct file_operations hid_debug_events_fops = { .owner = THIS_MODULE, .open = hid_debug_events_open, .read = hid_debug_events_read, .poll = hid_debug_events_poll, .release = hid_debug_events_release, .llseek = noop_llseek, }; void hid_debug_register(struct hid_device *hdev, const char *name) { hdev->debug_dir = debugfs_create_dir(name, hid_debug_root); hdev->debug_rdesc = debugfs_create_file("rdesc", 0400, hdev->debug_dir, hdev, &hid_debug_rdesc_fops); hdev->debug_events = debugfs_create_file("events", 0400, hdev->debug_dir, hdev, &hid_debug_events_fops); hdev->debug = 1; } void hid_debug_unregister(struct hid_device *hdev) { hdev->debug = 0; wake_up_interruptible(&hdev->debug_wait); debugfs_remove(hdev->debug_rdesc); debugfs_remove(hdev->debug_events); debugfs_remove(hdev->debug_dir); } void hid_debug_init(void) { hid_debug_root = debugfs_create_dir("hid", NULL); } void hid_debug_exit(void) { debugfs_remove_recursive(hid_debug_root); }