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, 0x65, "AbsoluteStateOfCharge" }, 421 { 0x85, 0x66, "RemainingCapacity" }, 422 { 0x85, 0x68, "RunTimeToEmpty" }, 423 { 0x85, 0x6a, "AverageTimeToFull" }, 424 { 0x85, 0x83, "DesignCapacity" }, 425 { 0x85, 0x85, "ManufacturerDate" }, 426 { 0x85, 0x89, "iDeviceChemistry" }, 427 { 0x85, 0x8b, "Rechargeable" }, 428 { 0x85, 0x8f, "iOEMInformation" }, 429 { 0x85, 0x8d, "CapacityGranularity1" }, 430 { 0x85, 0xd0, "ACPresent" }, 431 /* pages 0xff00 to 0xffff are vendor-specific */ 432 { 0xffff, 0, "Vendor-specific-FF" }, 433 { 0, 0, NULL } 434 }; 435 436 /* Either output directly into simple seq_file, or (if f == NULL) 437 * allocate a separate buffer that will then be passed to the 'events' 438 * ringbuffer. 439 * 440 * This is because these functions can be called both for "one-shot" 441 * "rdesc" while resolving, or for blocking "events". 442 * 443 * This holds both for resolv_usage_page() and hid_resolv_usage(). 444 */ 445 static char *resolv_usage_page(unsigned page, struct seq_file *f) { 446 const struct hid_usage_entry *p; 447 char *buf = NULL; 448 449 if (!f) { 450 buf = kzalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC); 451 if (!buf) 452 return ERR_PTR(-ENOMEM); 453 } 454 455 for (p = hid_usage_table; p->description; p++) 456 if (p->page == page) { 457 if (!f) { 458 snprintf(buf, HID_DEBUG_BUFSIZE, "%s", 459 p->description); 460 return buf; 461 } 462 else { 463 seq_printf(f, "%s", p->description); 464 return NULL; 465 } 466 } 467 if (!f) 468 snprintf(buf, HID_DEBUG_BUFSIZE, "%04x", page); 469 else 470 seq_printf(f, "%04x", page); 471 return buf; 472 } 473 474 char *hid_resolv_usage(unsigned usage, struct seq_file *f) { 475 const struct hid_usage_entry *p; 476 char *buf = NULL; 477 int len = 0; 478 479 buf = resolv_usage_page(usage >> 16, f); 480 if (IS_ERR(buf)) { 481 pr_err("error allocating HID debug buffer\n"); 482 return NULL; 483 } 484 485 486 if (!f) { 487 len = strlen(buf); 488 snprintf(buf+len, max(0, HID_DEBUG_BUFSIZE - len), "."); 489 len++; 490 } 491 else { 492 seq_printf(f, "."); 493 } 494 for (p = hid_usage_table; p->description; p++) 495 if (p->page == (usage >> 16)) { 496 for(++p; p->description && p->usage != 0; p++) 497 if (p->usage == (usage & 0xffff)) { 498 if (!f) 499 snprintf(buf + len, 500 max(0,HID_DEBUG_BUFSIZE - len - 1), 501 "%s", p->description); 502 else 503 seq_printf(f, 504 "%s", 505 p->description); 506 return buf; 507 } 508 break; 509 } 510 if (!f) 511 snprintf(buf + len, max(0, HID_DEBUG_BUFSIZE - len - 1), 512 "%04x", usage & 0xffff); 513 else 514 seq_printf(f, "%04x", usage & 0xffff); 515 return buf; 516 } 517 EXPORT_SYMBOL_GPL(hid_resolv_usage); 518 519 static void tab(int n, struct seq_file *f) { 520 seq_printf(f, "%*s", n, ""); 521 } 522 523 void hid_dump_field(struct hid_field *field, int n, struct seq_file *f) { 524 int j; 525 526 if (field->physical) { 527 tab(n, f); 528 seq_printf(f, "Physical("); 529 hid_resolv_usage(field->physical, f); seq_printf(f, ")\n"); 530 } 531 if (field->logical) { 532 tab(n, f); 533 seq_printf(f, "Logical("); 534 hid_resolv_usage(field->logical, f); seq_printf(f, ")\n"); 535 } 536 if (field->application) { 537 tab(n, f); 538 seq_printf(f, "Application("); 539 hid_resolv_usage(field->application, f); seq_printf(f, ")\n"); 540 } 541 tab(n, f); seq_printf(f, "Usage(%d)\n", field->maxusage); 542 for (j = 0; j < field->maxusage; j++) { 543 tab(n+2, f); hid_resolv_usage(field->usage[j].hid, f); seq_printf(f, "\n"); 544 } 545 if (field->logical_minimum != field->logical_maximum) { 546 tab(n, f); seq_printf(f, "Logical Minimum(%d)\n", field->logical_minimum); 547 tab(n, f); seq_printf(f, "Logical Maximum(%d)\n", field->logical_maximum); 548 } 549 if (field->physical_minimum != field->physical_maximum) { 550 tab(n, f); seq_printf(f, "Physical Minimum(%d)\n", field->physical_minimum); 551 tab(n, f); seq_printf(f, "Physical Maximum(%d)\n", field->physical_maximum); 552 } 553 if (field->unit_exponent) { 554 tab(n, f); seq_printf(f, "Unit Exponent(%d)\n", field->unit_exponent); 555 } 556 if (field->unit) { 557 static const char *systems[5] = { "None", "SI Linear", "SI Rotation", "English Linear", "English Rotation" }; 558 static const char *units[5][8] = { 559 { "None", "None", "None", "None", "None", "None", "None", "None" }, 560 { "None", "Centimeter", "Gram", "Seconds", "Kelvin", "Ampere", "Candela", "None" }, 561 { "None", "Radians", "Gram", "Seconds", "Kelvin", "Ampere", "Candela", "None" }, 562 { "None", "Inch", "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" }, 563 { "None", "Degrees", "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" } 564 }; 565 566 int i; 567 int sys; 568 __u32 data = field->unit; 569 570 /* First nibble tells us which system we're in. */ 571 sys = data & 0xf; 572 data >>= 4; 573 574 if(sys > 4) { 575 tab(n, f); seq_printf(f, "Unit(Invalid)\n"); 576 } 577 else { 578 int earlier_unit = 0; 579 580 tab(n, f); seq_printf(f, "Unit(%s : ", systems[sys]); 581 582 for (i=1 ; i<sizeof(__u32)*2 ; i++) { 583 char nibble = data & 0xf; 584 data >>= 4; 585 if (nibble != 0) { 586 if(earlier_unit++ > 0) 587 seq_printf(f, "*"); 588 seq_printf(f, "%s", units[sys][i]); 589 if(nibble != 1) { 590 /* This is a _signed_ nibble(!) */ 591 592 int val = nibble & 0x7; 593 if(nibble & 0x08) 594 val = -((0x7 & ~val) +1); 595 seq_printf(f, "^%d", val); 596 } 597 } 598 } 599 seq_printf(f, ")\n"); 600 } 601 } 602 tab(n, f); seq_printf(f, "Report Size(%u)\n", field->report_size); 603 tab(n, f); seq_printf(f, "Report Count(%u)\n", field->report_count); 604 tab(n, f); seq_printf(f, "Report Offset(%u)\n", field->report_offset); 605 606 tab(n, f); seq_printf(f, "Flags( "); 607 j = field->flags; 608 seq_printf(f, "%s", HID_MAIN_ITEM_CONSTANT & j ? "Constant " : ""); 609 seq_printf(f, "%s", HID_MAIN_ITEM_VARIABLE & j ? "Variable " : "Array "); 610 seq_printf(f, "%s", HID_MAIN_ITEM_RELATIVE & j ? "Relative " : "Absolute "); 611 seq_printf(f, "%s", HID_MAIN_ITEM_WRAP & j ? "Wrap " : ""); 612 seq_printf(f, "%s", HID_MAIN_ITEM_NONLINEAR & j ? "NonLinear " : ""); 613 seq_printf(f, "%s", HID_MAIN_ITEM_NO_PREFERRED & j ? "NoPreferredState " : ""); 614 seq_printf(f, "%s", HID_MAIN_ITEM_NULL_STATE & j ? "NullState " : ""); 615 seq_printf(f, "%s", HID_MAIN_ITEM_VOLATILE & j ? "Volatile " : ""); 616 seq_printf(f, "%s", HID_MAIN_ITEM_BUFFERED_BYTE & j ? "BufferedByte " : ""); 617 seq_printf(f, ")\n"); 618 } 619 EXPORT_SYMBOL_GPL(hid_dump_field); 620 621 void hid_dump_device(struct hid_device *device, struct seq_file *f) 622 { 623 struct hid_report_enum *report_enum; 624 struct hid_report *report; 625 struct list_head *list; 626 unsigned i,k; 627 static const char *table[] = {"INPUT", "OUTPUT", "FEATURE"}; 628 629 for (i = 0; i < HID_REPORT_TYPES; i++) { 630 report_enum = device->report_enum + i; 631 list = report_enum->report_list.next; 632 while (list != &report_enum->report_list) { 633 report = (struct hid_report *) list; 634 tab(2, f); 635 seq_printf(f, "%s", table[i]); 636 if (report->id) 637 seq_printf(f, "(%d)", report->id); 638 seq_printf(f, "[%s]", table[report->type]); 639 seq_printf(f, "\n"); 640 for (k = 0; k < report->maxfield; k++) { 641 tab(4, f); 642 seq_printf(f, "Field(%d)\n", k); 643 hid_dump_field(report->field[k], 6, f); 644 } 645 list = list->next; 646 } 647 } 648 } 649 EXPORT_SYMBOL_GPL(hid_dump_device); 650 651 /* enqueue string to 'events' ring buffer */ 652 void hid_debug_event(struct hid_device *hdev, char *buf) 653 { 654 struct hid_debug_list *list; 655 unsigned long flags; 656 657 spin_lock_irqsave(&hdev->debug_list_lock, flags); 658 list_for_each_entry(list, &hdev->debug_list, node) 659 kfifo_in(&list->hid_debug_fifo, buf, strlen(buf)); 660 spin_unlock_irqrestore(&hdev->debug_list_lock, flags); 661 662 wake_up_interruptible(&hdev->debug_wait); 663 } 664 EXPORT_SYMBOL_GPL(hid_debug_event); 665 666 void hid_dump_report(struct hid_device *hid, int type, u8 *data, 667 int size) 668 { 669 struct hid_report_enum *report_enum; 670 char *buf; 671 unsigned int i; 672 673 buf = kmalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC); 674 675 if (!buf) 676 return; 677 678 report_enum = hid->report_enum + type; 679 680 /* dump the report */ 681 snprintf(buf, HID_DEBUG_BUFSIZE - 1, 682 "\nreport (size %u) (%snumbered) = ", size, 683 report_enum->numbered ? "" : "un"); 684 hid_debug_event(hid, buf); 685 686 for (i = 0; i < size; i++) { 687 snprintf(buf, HID_DEBUG_BUFSIZE - 1, 688 " %02x", data[i]); 689 hid_debug_event(hid, buf); 690 } 691 hid_debug_event(hid, "\n"); 692 kfree(buf); 693 } 694 EXPORT_SYMBOL_GPL(hid_dump_report); 695 696 void hid_dump_input(struct hid_device *hdev, struct hid_usage *usage, __s32 value) 697 { 698 char *buf; 699 int len; 700 701 buf = hid_resolv_usage(usage->hid, NULL); 702 if (!buf) 703 return; 704 len = strlen(buf); 705 snprintf(buf + len, HID_DEBUG_BUFSIZE - len - 1, " = %d\n", value); 706 707 hid_debug_event(hdev, buf); 708 709 kfree(buf); 710 wake_up_interruptible(&hdev->debug_wait); 711 } 712 EXPORT_SYMBOL_GPL(hid_dump_input); 713 714 static const char *events[EV_MAX + 1] = { 715 [EV_SYN] = "Sync", [EV_KEY] = "Key", 716 [EV_REL] = "Relative", [EV_ABS] = "Absolute", 717 [EV_MSC] = "Misc", [EV_LED] = "LED", 718 [EV_SND] = "Sound", [EV_REP] = "Repeat", 719 [EV_FF] = "ForceFeedback", [EV_PWR] = "Power", 720 [EV_FF_STATUS] = "ForceFeedbackStatus", 721 }; 722 723 static const char *syncs[3] = { 724 [SYN_REPORT] = "Report", [SYN_CONFIG] = "Config", 725 [SYN_MT_REPORT] = "MT Report", 726 }; 727 728 static const char *keys[KEY_MAX + 1] = { 729 [KEY_RESERVED] = "Reserved", [KEY_ESC] = "Esc", 730 [KEY_1] = "1", [KEY_2] = "2", 731 [KEY_3] = "3", [KEY_4] = "4", 732 [KEY_5] = "5", [KEY_6] = "6", 733 [KEY_7] = "7", [KEY_8] = "8", 734 [KEY_9] = "9", [KEY_0] = "0", 735 [KEY_MINUS] = "Minus", [KEY_EQUAL] = "Equal", 736 [KEY_BACKSPACE] = "Backspace", [KEY_TAB] = "Tab", 737 [KEY_Q] = "Q", [KEY_W] = "W", 738 [KEY_E] = "E", [KEY_R] = "R", 739 [KEY_T] = "T", [KEY_Y] = "Y", 740 [KEY_U] = "U", [KEY_I] = "I", 741 [KEY_O] = "O", [KEY_P] = "P", 742 [KEY_LEFTBRACE] = "LeftBrace", [KEY_RIGHTBRACE] = "RightBrace", 743 [KEY_ENTER] = "Enter", [KEY_LEFTCTRL] = "LeftControl", 744 [KEY_A] = "A", [KEY_S] = "S", 745 [KEY_D] = "D", [KEY_F] = "F", 746 [KEY_G] = "G", [KEY_H] = "H", 747 [KEY_J] = "J", [KEY_K] = "K", 748 [KEY_L] = "L", [KEY_SEMICOLON] = "Semicolon", 749 [KEY_APOSTROPHE] = "Apostrophe", [KEY_GRAVE] = "Grave", 750 [KEY_LEFTSHIFT] = "LeftShift", [KEY_BACKSLASH] = "BackSlash", 751 [KEY_Z] = "Z", [KEY_X] = "X", 752 [KEY_C] = "C", [KEY_V] = "V", 753 [KEY_B] = "B", [KEY_N] = "N", 754 [KEY_M] = "M", [KEY_COMMA] = "Comma", 755 [KEY_DOT] = "Dot", [KEY_SLASH] = "Slash", 756 [KEY_RIGHTSHIFT] = "RightShift", [KEY_KPASTERISK] = "KPAsterisk", 757 [KEY_LEFTALT] = "LeftAlt", [KEY_SPACE] = "Space", 758 [KEY_CAPSLOCK] = "CapsLock", [KEY_F1] = "F1", 759 [KEY_F2] = "F2", [KEY_F3] = "F3", 760 [KEY_F4] = "F4", [KEY_F5] = "F5", 761 [KEY_F6] = "F6", [KEY_F7] = "F7", 762 [KEY_F8] = "F8", [KEY_F9] = "F9", 763 [KEY_F10] = "F10", [KEY_NUMLOCK] = "NumLock", 764 [KEY_SCROLLLOCK] = "ScrollLock", [KEY_KP7] = "KP7", 765 [KEY_KP8] = "KP8", [KEY_KP9] = "KP9", 766 [KEY_KPMINUS] = "KPMinus", [KEY_KP4] = "KP4", 767 [KEY_KP5] = "KP5", [KEY_KP6] = "KP6", 768 [KEY_KPPLUS] = "KPPlus", [KEY_KP1] = "KP1", 769 [KEY_KP2] = "KP2", [KEY_KP3] = "KP3", 770 [KEY_KP0] = "KP0", [KEY_KPDOT] = "KPDot", 771 [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd", 772 [KEY_F11] = "F11", [KEY_F12] = "F12", 773 [KEY_RO] = "RO", [KEY_KATAKANA] = "Katakana", 774 [KEY_HIRAGANA] = "HIRAGANA", [KEY_HENKAN] = "Henkan", 775 [KEY_KATAKANAHIRAGANA] = "Katakana/Hiragana", [KEY_MUHENKAN] = "Muhenkan", 776 [KEY_KPJPCOMMA] = "KPJpComma", [KEY_KPENTER] = "KPEnter", 777 [KEY_RIGHTCTRL] = "RightCtrl", [KEY_KPSLASH] = "KPSlash", 778 [KEY_SYSRQ] = "SysRq", [KEY_RIGHTALT] = "RightAlt", 779 [KEY_LINEFEED] = "LineFeed", [KEY_HOME] = "Home", 780 [KEY_UP] = "Up", [KEY_PAGEUP] = "PageUp", 781 [KEY_LEFT] = "Left", [KEY_RIGHT] = "Right", 782 [KEY_END] = "End", [KEY_DOWN] = "Down", 783 [KEY_PAGEDOWN] = "PageDown", [KEY_INSERT] = "Insert", 784 [KEY_DELETE] = "Delete", [KEY_MACRO] = "Macro", 785 [KEY_MUTE] = "Mute", [KEY_VOLUMEDOWN] = "VolumeDown", 786 [KEY_VOLUMEUP] = "VolumeUp", [KEY_POWER] = "Power", 787 [KEY_KPEQUAL] = "KPEqual", [KEY_KPPLUSMINUS] = "KPPlusMinus", 788 [KEY_PAUSE] = "Pause", [KEY_KPCOMMA] = "KPComma", 789 [KEY_HANGUEL] = "Hangeul", [KEY_HANJA] = "Hanja", 790 [KEY_YEN] = "Yen", [KEY_LEFTMETA] = "LeftMeta", 791 [KEY_RIGHTMETA] = "RightMeta", [KEY_COMPOSE] = "Compose", 792 [KEY_STOP] = "Stop", [KEY_AGAIN] = "Again", 793 [KEY_PROPS] = "Props", [KEY_UNDO] = "Undo", 794 [KEY_FRONT] = "Front", [KEY_COPY] = "Copy", 795 [KEY_OPEN] = "Open", [KEY_PASTE] = "Paste", 796 [KEY_FIND] = "Find", [KEY_CUT] = "Cut", 797 [KEY_HELP] = "Help", [KEY_MENU] = "Menu", 798 [KEY_CALC] = "Calc", [KEY_SETUP] = "Setup", 799 [KEY_SLEEP] = "Sleep", [KEY_WAKEUP] = "WakeUp", 800 [KEY_FILE] = "File", [KEY_SENDFILE] = "SendFile", 801 [KEY_DELETEFILE] = "DeleteFile", [KEY_XFER] = "X-fer", 802 [KEY_PROG1] = "Prog1", [KEY_PROG2] = "Prog2", 803 [KEY_WWW] = "WWW", [KEY_MSDOS] = "MSDOS", 804 [KEY_COFFEE] = "Coffee", [KEY_ROTATE_DISPLAY] = "RotateDisplay", 805 [KEY_CYCLEWINDOWS] = "CycleWindows", [KEY_MAIL] = "Mail", 806 [KEY_BOOKMARKS] = "Bookmarks", [KEY_COMPUTER] = "Computer", 807 [KEY_BACK] = "Back", [KEY_FORWARD] = "Forward", 808 [KEY_CLOSECD] = "CloseCD", [KEY_EJECTCD] = "EjectCD", 809 [KEY_EJECTCLOSECD] = "EjectCloseCD", [KEY_NEXTSONG] = "NextSong", 810 [KEY_PLAYPAUSE] = "PlayPause", [KEY_PREVIOUSSONG] = "PreviousSong", 811 [KEY_STOPCD] = "StopCD", [KEY_RECORD] = "Record", 812 [KEY_REWIND] = "Rewind", [KEY_PHONE] = "Phone", 813 [KEY_ISO] = "ISOKey", [KEY_CONFIG] = "Config", 814 [KEY_HOMEPAGE] = "HomePage", [KEY_REFRESH] = "Refresh", 815 [KEY_EXIT] = "Exit", [KEY_MOVE] = "Move", 816 [KEY_EDIT] = "Edit", [KEY_SCROLLUP] = "ScrollUp", 817 [KEY_SCROLLDOWN] = "ScrollDown", [KEY_KPLEFTPAREN] = "KPLeftParenthesis", 818 [KEY_KPRIGHTPAREN] = "KPRightParenthesis", [KEY_NEW] = "New", 819 [KEY_REDO] = "Redo", [KEY_F13] = "F13", 820 [KEY_F14] = "F14", [KEY_F15] = "F15", 821 [KEY_F16] = "F16", [KEY_F17] = "F17", 822 [KEY_F18] = "F18", [KEY_F19] = "F19", 823 [KEY_F20] = "F20", [KEY_F21] = "F21", 824 [KEY_F22] = "F22", [KEY_F23] = "F23", 825 [KEY_F24] = "F24", [KEY_PLAYCD] = "PlayCD", 826 [KEY_PAUSECD] = "PauseCD", [KEY_PROG3] = "Prog3", 827 [KEY_PROG4] = "Prog4", [KEY_SUSPEND] = "Suspend", 828 [KEY_CLOSE] = "Close", [KEY_PLAY] = "Play", 829 [KEY_FASTFORWARD] = "FastForward", [KEY_BASSBOOST] = "BassBoost", 830 [KEY_PRINT] = "Print", [KEY_HP] = "HP", 831 [KEY_CAMERA] = "Camera", [KEY_SOUND] = "Sound", 832 [KEY_QUESTION] = "Question", [KEY_EMAIL] = "Email", 833 [KEY_CHAT] = "Chat", [KEY_SEARCH] = "Search", 834 [KEY_CONNECT] = "Connect", [KEY_FINANCE] = "Finance", 835 [KEY_SPORT] = "Sport", [KEY_SHOP] = "Shop", 836 [KEY_ALTERASE] = "AlternateErase", [KEY_CANCEL] = "Cancel", 837 [KEY_BRIGHTNESSDOWN] = "BrightnessDown", [KEY_BRIGHTNESSUP] = "BrightnessUp", 838 [KEY_MEDIA] = "Media", [KEY_UNKNOWN] = "Unknown", 839 [BTN_DPAD_UP] = "BtnDPadUp", [BTN_DPAD_DOWN] = "BtnDPadDown", 840 [BTN_DPAD_LEFT] = "BtnDPadLeft", [BTN_DPAD_RIGHT] = "BtnDPadRight", 841 [BTN_0] = "Btn0", [BTN_1] = "Btn1", 842 [BTN_2] = "Btn2", [BTN_3] = "Btn3", 843 [BTN_4] = "Btn4", [BTN_5] = "Btn5", 844 [BTN_6] = "Btn6", [BTN_7] = "Btn7", 845 [BTN_8] = "Btn8", [BTN_9] = "Btn9", 846 [BTN_LEFT] = "LeftBtn", [BTN_RIGHT] = "RightBtn", 847 [BTN_MIDDLE] = "MiddleBtn", [BTN_SIDE] = "SideBtn", 848 [BTN_EXTRA] = "ExtraBtn", [BTN_FORWARD] = "ForwardBtn", 849 [BTN_BACK] = "BackBtn", [BTN_TASK] = "TaskBtn", 850 [BTN_TRIGGER] = "Trigger", [BTN_THUMB] = "ThumbBtn", 851 [BTN_THUMB2] = "ThumbBtn2", [BTN_TOP] = "TopBtn", 852 [BTN_TOP2] = "TopBtn2", [BTN_PINKIE] = "PinkieBtn", 853 [BTN_BASE] = "BaseBtn", [BTN_BASE2] = "BaseBtn2", 854 [BTN_BASE3] = "BaseBtn3", [BTN_BASE4] = "BaseBtn4", 855 [BTN_BASE5] = "BaseBtn5", [BTN_BASE6] = "BaseBtn6", 856 [BTN_DEAD] = "BtnDead", [BTN_A] = "BtnA", 857 [BTN_B] = "BtnB", [BTN_C] = "BtnC", 858 [BTN_X] = "BtnX", [BTN_Y] = "BtnY", 859 [BTN_Z] = "BtnZ", [BTN_TL] = "BtnTL", 860 [BTN_TR] = "BtnTR", [BTN_TL2] = "BtnTL2", 861 [BTN_TR2] = "BtnTR2", [BTN_SELECT] = "BtnSelect", 862 [BTN_START] = "BtnStart", [BTN_MODE] = "BtnMode", 863 [BTN_THUMBL] = "BtnThumbL", [BTN_THUMBR] = "BtnThumbR", 864 [BTN_TOOL_PEN] = "ToolPen", [BTN_TOOL_RUBBER] = "ToolRubber", 865 [BTN_TOOL_BRUSH] = "ToolBrush", [BTN_TOOL_PENCIL] = "ToolPencil", 866 [BTN_TOOL_AIRBRUSH] = "ToolAirbrush", [BTN_TOOL_FINGER] = "ToolFinger", 867 [BTN_TOOL_MOUSE] = "ToolMouse", [BTN_TOOL_LENS] = "ToolLens", 868 [BTN_TOUCH] = "Touch", [BTN_STYLUS] = "Stylus", 869 [BTN_STYLUS2] = "Stylus2", [BTN_TOOL_DOUBLETAP] = "ToolDoubleTap", 870 [BTN_TOOL_TRIPLETAP] = "ToolTripleTap", [BTN_TOOL_QUADTAP] = "ToolQuadrupleTap", 871 [BTN_GEAR_DOWN] = "WheelBtn", 872 [BTN_GEAR_UP] = "Gear up", [KEY_OK] = "Ok", 873 [KEY_SELECT] = "Select", [KEY_GOTO] = "Goto", 874 [KEY_CLEAR] = "Clear", [KEY_POWER2] = "Power2", 875 [KEY_OPTION] = "Option", [KEY_INFO] = "Info", 876 [KEY_TIME] = "Time", [KEY_VENDOR] = "Vendor", 877 [KEY_ARCHIVE] = "Archive", [KEY_PROGRAM] = "Program", 878 [KEY_CHANNEL] = "Channel", [KEY_FAVORITES] = "Favorites", 879 [KEY_EPG] = "EPG", [KEY_PVR] = "PVR", 880 [KEY_MHP] = "MHP", [KEY_LANGUAGE] = "Language", 881 [KEY_TITLE] = "Title", [KEY_SUBTITLE] = "Subtitle", 882 [KEY_ANGLE] = "Angle", [KEY_ZOOM] = "Zoom", 883 [KEY_MODE] = "Mode", [KEY_KEYBOARD] = "Keyboard", 884 [KEY_SCREEN] = "Screen", [KEY_PC] = "PC", 885 [KEY_TV] = "TV", [KEY_TV2] = "TV2", 886 [KEY_VCR] = "VCR", [KEY_VCR2] = "VCR2", 887 [KEY_SAT] = "Sat", [KEY_SAT2] = "Sat2", 888 [KEY_CD] = "CD", [KEY_TAPE] = "Tape", 889 [KEY_RADIO] = "Radio", [KEY_TUNER] = "Tuner", 890 [KEY_PLAYER] = "Player", [KEY_TEXT] = "Text", 891 [KEY_DVD] = "DVD", [KEY_AUX] = "Aux", 892 [KEY_MP3] = "MP3", [KEY_AUDIO] = "Audio", 893 [KEY_VIDEO] = "Video", [KEY_DIRECTORY] = "Directory", 894 [KEY_LIST] = "List", [KEY_MEMO] = "Memo", 895 [KEY_CALENDAR] = "Calendar", [KEY_RED] = "Red", 896 [KEY_GREEN] = "Green", [KEY_YELLOW] = "Yellow", 897 [KEY_BLUE] = "Blue", [KEY_CHANNELUP] = "ChannelUp", 898 [KEY_CHANNELDOWN] = "ChannelDown", [KEY_FIRST] = "First", 899 [KEY_LAST] = "Last", [KEY_AB] = "AB", 900 [KEY_NEXT] = "Next", [KEY_RESTART] = "Restart", 901 [KEY_SLOW] = "Slow", [KEY_SHUFFLE] = "Shuffle", 902 [KEY_BREAK] = "Break", [KEY_PREVIOUS] = "Previous", 903 [KEY_DIGITS] = "Digits", [KEY_TEEN] = "TEEN", 904 [KEY_TWEN] = "TWEN", [KEY_DEL_EOL] = "DeleteEOL", 905 [KEY_DEL_EOS] = "DeleteEOS", [KEY_INS_LINE] = "InsertLine", 906 [KEY_DEL_LINE] = "DeleteLine", 907 [KEY_SEND] = "Send", [KEY_REPLY] = "Reply", 908 [KEY_FORWARDMAIL] = "ForwardMail", [KEY_SAVE] = "Save", 909 [KEY_DOCUMENTS] = "Documents", [KEY_SPELLCHECK] = "SpellCheck", 910 [KEY_LOGOFF] = "Logoff", 911 [KEY_FN] = "Fn", [KEY_FN_ESC] = "Fn+ESC", 912 [KEY_FN_1] = "Fn+1", [KEY_FN_2] = "Fn+2", 913 [KEY_FN_B] = "Fn+B", [KEY_FN_D] = "Fn+D", 914 [KEY_FN_E] = "Fn+E", [KEY_FN_F] = "Fn+F", 915 [KEY_FN_S] = "Fn+S", 916 [KEY_FN_F1] = "Fn+F1", [KEY_FN_F2] = "Fn+F2", 917 [KEY_FN_F3] = "Fn+F3", [KEY_FN_F4] = "Fn+F4", 918 [KEY_FN_F5] = "Fn+F5", [KEY_FN_F6] = "Fn+F6", 919 [KEY_FN_F7] = "Fn+F7", [KEY_FN_F8] = "Fn+F8", 920 [KEY_FN_F9] = "Fn+F9", [KEY_FN_F10] = "Fn+F10", 921 [KEY_FN_F11] = "Fn+F11", [KEY_FN_F12] = "Fn+F12", 922 [KEY_KBDILLUMTOGGLE] = "KbdIlluminationToggle", 923 [KEY_KBDILLUMDOWN] = "KbdIlluminationDown", 924 [KEY_KBDILLUMUP] = "KbdIlluminationUp", 925 [KEY_SWITCHVIDEOMODE] = "SwitchVideoMode", 926 [KEY_BUTTONCONFIG] = "ButtonConfig", 927 [KEY_TASKMANAGER] = "TaskManager", 928 [KEY_JOURNAL] = "Journal", 929 [KEY_CONTROLPANEL] = "ControlPanel", 930 [KEY_APPSELECT] = "AppSelect", 931 [KEY_SCREENSAVER] = "ScreenSaver", 932 [KEY_VOICECOMMAND] = "VoiceCommand", 933 [KEY_BRIGHTNESS_MIN] = "BrightnessMin", 934 [KEY_BRIGHTNESS_MAX] = "BrightnessMax", 935 [KEY_BRIGHTNESS_AUTO] = "BrightnessAuto", 936 [KEY_KBDINPUTASSIST_PREV] = "KbdInputAssistPrev", 937 [KEY_KBDINPUTASSIST_NEXT] = "KbdInputAssistNext", 938 [KEY_KBDINPUTASSIST_PREVGROUP] = "KbdInputAssistPrevGroup", 939 [KEY_KBDINPUTASSIST_NEXTGROUP] = "KbdInputAssistNextGroup", 940 [KEY_KBDINPUTASSIST_ACCEPT] = "KbdInputAssistAccept", 941 [KEY_KBDINPUTASSIST_CANCEL] = "KbdInputAssistCancel", 942 }; 943 944 static const char *relatives[REL_MAX + 1] = { 945 [REL_X] = "X", [REL_Y] = "Y", 946 [REL_Z] = "Z", [REL_RX] = "Rx", 947 [REL_RY] = "Ry", [REL_RZ] = "Rz", 948 [REL_HWHEEL] = "HWheel", [REL_DIAL] = "Dial", 949 [REL_WHEEL] = "Wheel", [REL_MISC] = "Misc", 950 }; 951 952 static const char *absolutes[ABS_CNT] = { 953 [ABS_X] = "X", [ABS_Y] = "Y", 954 [ABS_Z] = "Z", [ABS_RX] = "Rx", 955 [ABS_RY] = "Ry", [ABS_RZ] = "Rz", 956 [ABS_THROTTLE] = "Throttle", [ABS_RUDDER] = "Rudder", 957 [ABS_WHEEL] = "Wheel", [ABS_GAS] = "Gas", 958 [ABS_BRAKE] = "Brake", [ABS_HAT0X] = "Hat0X", 959 [ABS_HAT0Y] = "Hat0Y", [ABS_HAT1X] = "Hat1X", 960 [ABS_HAT1Y] = "Hat1Y", [ABS_HAT2X] = "Hat2X", 961 [ABS_HAT2Y] = "Hat2Y", [ABS_HAT3X] = "Hat3X", 962 [ABS_HAT3Y] = "Hat 3Y", [ABS_PRESSURE] = "Pressure", 963 [ABS_DISTANCE] = "Distance", [ABS_TILT_X] = "XTilt", 964 [ABS_TILT_Y] = "YTilt", [ABS_TOOL_WIDTH] = "ToolWidth", 965 [ABS_VOLUME] = "Volume", [ABS_MISC] = "Misc", 966 [ABS_MT_TOUCH_MAJOR] = "MTMajor", 967 [ABS_MT_TOUCH_MINOR] = "MTMinor", 968 [ABS_MT_WIDTH_MAJOR] = "MTMajorW", 969 [ABS_MT_WIDTH_MINOR] = "MTMinorW", 970 [ABS_MT_ORIENTATION] = "MTOrientation", 971 [ABS_MT_POSITION_X] = "MTPositionX", 972 [ABS_MT_POSITION_Y] = "MTPositionY", 973 [ABS_MT_TOOL_TYPE] = "MTToolType", 974 [ABS_MT_BLOB_ID] = "MTBlobID", 975 }; 976 977 static const char *misc[MSC_MAX + 1] = { 978 [MSC_SERIAL] = "Serial", [MSC_PULSELED] = "Pulseled", 979 [MSC_GESTURE] = "Gesture", [MSC_RAW] = "RawData" 980 }; 981 982 static const char *leds[LED_MAX + 1] = { 983 [LED_NUML] = "NumLock", [LED_CAPSL] = "CapsLock", 984 [LED_SCROLLL] = "ScrollLock", [LED_COMPOSE] = "Compose", 985 [LED_KANA] = "Kana", [LED_SLEEP] = "Sleep", 986 [LED_SUSPEND] = "Suspend", [LED_MUTE] = "Mute", 987 [LED_MISC] = "Misc", 988 }; 989 990 static const char *repeats[REP_MAX + 1] = { 991 [REP_DELAY] = "Delay", [REP_PERIOD] = "Period" 992 }; 993 994 static const char *sounds[SND_MAX + 1] = { 995 [SND_CLICK] = "Click", [SND_BELL] = "Bell", 996 [SND_TONE] = "Tone" 997 }; 998 999 static const char **names[EV_MAX + 1] = { 1000 [EV_SYN] = syncs, [EV_KEY] = keys, 1001 [EV_REL] = relatives, [EV_ABS] = absolutes, 1002 [EV_MSC] = misc, [EV_LED] = leds, 1003 [EV_SND] = sounds, [EV_REP] = repeats, 1004 }; 1005 1006 static void hid_resolv_event(__u8 type, __u16 code, struct seq_file *f) 1007 { 1008 seq_printf(f, "%s.%s", events[type] ? events[type] : "?", 1009 names[type] ? (names[type][code] ? names[type][code] : "?") : "?"); 1010 } 1011 1012 static void hid_dump_input_mapping(struct hid_device *hid, struct seq_file *f) 1013 { 1014 int i, j, k; 1015 struct hid_report *report; 1016 struct hid_usage *usage; 1017 1018 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1019 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1020 for (i = 0; i < report->maxfield; i++) { 1021 for ( j = 0; j < report->field[i]->maxusage; j++) { 1022 usage = report->field[i]->usage + j; 1023 hid_resolv_usage(usage->hid, f); 1024 seq_printf(f, " ---> "); 1025 hid_resolv_event(usage->type, usage->code, f); 1026 seq_printf(f, "\n"); 1027 } 1028 } 1029 } 1030 } 1031 1032 } 1033 1034 static int hid_debug_rdesc_show(struct seq_file *f, void *p) 1035 { 1036 struct hid_device *hdev = f->private; 1037 const __u8 *rdesc = hdev->rdesc; 1038 unsigned rsize = hdev->rsize; 1039 int i; 1040 1041 if (!rdesc) { 1042 rdesc = hdev->dev_rdesc; 1043 rsize = hdev->dev_rsize; 1044 } 1045 1046 /* dump HID report descriptor */ 1047 for (i = 0; i < rsize; i++) 1048 seq_printf(f, "%02x ", rdesc[i]); 1049 seq_printf(f, "\n\n"); 1050 1051 /* dump parsed data and input mappings */ 1052 if (down_interruptible(&hdev->driver_input_lock)) 1053 return 0; 1054 1055 hid_dump_device(hdev, f); 1056 seq_printf(f, "\n"); 1057 hid_dump_input_mapping(hdev, f); 1058 1059 up(&hdev->driver_input_lock); 1060 1061 return 0; 1062 } 1063 1064 static int hid_debug_events_open(struct inode *inode, struct file *file) 1065 { 1066 int err = 0; 1067 struct hid_debug_list *list; 1068 unsigned long flags; 1069 1070 if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) { 1071 err = -ENOMEM; 1072 goto out; 1073 } 1074 1075 err = kfifo_alloc(&list->hid_debug_fifo, HID_DEBUG_FIFOSIZE, GFP_KERNEL); 1076 if (err) { 1077 kfree(list); 1078 goto out; 1079 } 1080 list->hdev = (struct hid_device *) inode->i_private; 1081 file->private_data = list; 1082 mutex_init(&list->read_mutex); 1083 1084 spin_lock_irqsave(&list->hdev->debug_list_lock, flags); 1085 list_add_tail(&list->node, &list->hdev->debug_list); 1086 spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); 1087 1088 out: 1089 return err; 1090 } 1091 1092 static ssize_t hid_debug_events_read(struct file *file, char __user *buffer, 1093 size_t count, loff_t *ppos) 1094 { 1095 struct hid_debug_list *list = file->private_data; 1096 int ret = 0, copied; 1097 DECLARE_WAITQUEUE(wait, current); 1098 1099 mutex_lock(&list->read_mutex); 1100 if (kfifo_is_empty(&list->hid_debug_fifo)) { 1101 add_wait_queue(&list->hdev->debug_wait, &wait); 1102 set_current_state(TASK_INTERRUPTIBLE); 1103 1104 while (kfifo_is_empty(&list->hid_debug_fifo)) { 1105 if (signal_pending(current)) { 1106 ret = -ERESTARTSYS; 1107 break; 1108 } 1109 1110 /* if list->hdev is NULL we cannot remove_wait_queue(). 1111 * if list->hdev->debug is 0 then hid_debug_unregister() 1112 * was already called and list->hdev is being destroyed. 1113 * if we add remove_wait_queue() here we can hit a race. 1114 */ 1115 if (!list->hdev || !list->hdev->debug) { 1116 ret = -EIO; 1117 set_current_state(TASK_RUNNING); 1118 goto out; 1119 } 1120 1121 if (file->f_flags & O_NONBLOCK) { 1122 ret = -EAGAIN; 1123 break; 1124 } 1125 1126 /* allow O_NONBLOCK from other threads */ 1127 mutex_unlock(&list->read_mutex); 1128 schedule(); 1129 mutex_lock(&list->read_mutex); 1130 set_current_state(TASK_INTERRUPTIBLE); 1131 } 1132 1133 __set_current_state(TASK_RUNNING); 1134 remove_wait_queue(&list->hdev->debug_wait, &wait); 1135 1136 if (ret) 1137 goto out; 1138 } 1139 1140 /* pass the fifo content to userspace, locking is not needed with only 1141 * one concurrent reader and one concurrent writer 1142 */ 1143 ret = kfifo_to_user(&list->hid_debug_fifo, buffer, count, &copied); 1144 if (ret) 1145 goto out; 1146 ret = copied; 1147 out: 1148 mutex_unlock(&list->read_mutex); 1149 return ret; 1150 } 1151 1152 static __poll_t hid_debug_events_poll(struct file *file, poll_table *wait) 1153 { 1154 struct hid_debug_list *list = file->private_data; 1155 1156 poll_wait(file, &list->hdev->debug_wait, wait); 1157 if (!kfifo_is_empty(&list->hid_debug_fifo)) 1158 return EPOLLIN | EPOLLRDNORM; 1159 if (!list->hdev->debug) 1160 return EPOLLERR | EPOLLHUP; 1161 return 0; 1162 } 1163 1164 static int hid_debug_events_release(struct inode *inode, struct file *file) 1165 { 1166 struct hid_debug_list *list = file->private_data; 1167 unsigned long flags; 1168 1169 spin_lock_irqsave(&list->hdev->debug_list_lock, flags); 1170 list_del(&list->node); 1171 spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); 1172 kfifo_free(&list->hid_debug_fifo); 1173 kfree(list); 1174 1175 return 0; 1176 } 1177 1178 DEFINE_SHOW_ATTRIBUTE(hid_debug_rdesc); 1179 1180 static const struct file_operations hid_debug_events_fops = { 1181 .owner = THIS_MODULE, 1182 .open = hid_debug_events_open, 1183 .read = hid_debug_events_read, 1184 .poll = hid_debug_events_poll, 1185 .release = hid_debug_events_release, 1186 .llseek = noop_llseek, 1187 }; 1188 1189 1190 void hid_debug_register(struct hid_device *hdev, const char *name) 1191 { 1192 hdev->debug_dir = debugfs_create_dir(name, hid_debug_root); 1193 hdev->debug_rdesc = debugfs_create_file("rdesc", 0400, 1194 hdev->debug_dir, hdev, &hid_debug_rdesc_fops); 1195 hdev->debug_events = debugfs_create_file("events", 0400, 1196 hdev->debug_dir, hdev, &hid_debug_events_fops); 1197 hdev->debug = 1; 1198 } 1199 1200 void hid_debug_unregister(struct hid_device *hdev) 1201 { 1202 hdev->debug = 0; 1203 wake_up_interruptible(&hdev->debug_wait); 1204 debugfs_remove(hdev->debug_rdesc); 1205 debugfs_remove(hdev->debug_events); 1206 debugfs_remove(hdev->debug_dir); 1207 } 1208 1209 void hid_debug_init(void) 1210 { 1211 hid_debug_root = debugfs_create_dir("hid", NULL); 1212 } 1213 1214 void hid_debug_exit(void) 1215 { 1216 debugfs_remove_recursive(hid_debug_root); 1217 } 1218