1 /* 2 * (c) 1999 Andreas Gal <gal@cs.uni-magdeburg.de> 3 * (c) 2000-2001 Vojtech Pavlik <vojtech@ucw.cz> 4 * (c) 2007-2009 Jiri Kosina 5 * 6 * HID debugging support 7 */ 8 9 /* 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 * Should you need to contact me, the author, you can do so either by 25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/debugfs.h> 32 #include <linux/seq_file.h> 33 #include <linux/kfifo.h> 34 #include <linux/sched/signal.h> 35 #include <linux/export.h> 36 #include <linux/slab.h> 37 #include <linux/uaccess.h> 38 #include <linux/poll.h> 39 40 #include <linux/hid.h> 41 #include <linux/hid-debug.h> 42 43 static struct dentry *hid_debug_root; 44 45 struct hid_usage_entry { 46 unsigned page; 47 unsigned usage; 48 const char *description; 49 }; 50 51 static const struct hid_usage_entry hid_usage_table[] = { 52 { 0, 0, "Undefined" }, 53 { 1, 0, "GenericDesktop" }, 54 {0, 0x01, "Pointer"}, 55 {0, 0x02, "Mouse"}, 56 {0, 0x04, "Joystick"}, 57 {0, 0x05, "GamePad"}, 58 {0, 0x06, "Keyboard"}, 59 {0, 0x07, "Keypad"}, 60 {0, 0x08, "MultiAxis"}, 61 {0, 0x30, "X"}, 62 {0, 0x31, "Y"}, 63 {0, 0x32, "Z"}, 64 {0, 0x33, "Rx"}, 65 {0, 0x34, "Ry"}, 66 {0, 0x35, "Rz"}, 67 {0, 0x36, "Slider"}, 68 {0, 0x37, "Dial"}, 69 {0, 0x38, "Wheel"}, 70 {0, 0x39, "HatSwitch"}, 71 {0, 0x3a, "CountedBuffer"}, 72 {0, 0x3b, "ByteCount"}, 73 {0, 0x3c, "MotionWakeup"}, 74 {0, 0x3d, "Start"}, 75 {0, 0x3e, "Select"}, 76 {0, 0x40, "Vx"}, 77 {0, 0x41, "Vy"}, 78 {0, 0x42, "Vz"}, 79 {0, 0x43, "Vbrx"}, 80 {0, 0x44, "Vbry"}, 81 {0, 0x45, "Vbrz"}, 82 {0, 0x46, "Vno"}, 83 {0, 0x80, "SystemControl"}, 84 {0, 0x81, "SystemPowerDown"}, 85 {0, 0x82, "SystemSleep"}, 86 {0, 0x83, "SystemWakeUp"}, 87 {0, 0x84, "SystemContextMenu"}, 88 {0, 0x85, "SystemMainMenu"}, 89 {0, 0x86, "SystemAppMenu"}, 90 {0, 0x87, "SystemMenuHelp"}, 91 {0, 0x88, "SystemMenuExit"}, 92 {0, 0x89, "SystemMenuSelect"}, 93 {0, 0x8a, "SystemMenuRight"}, 94 {0, 0x8b, "SystemMenuLeft"}, 95 {0, 0x8c, "SystemMenuUp"}, 96 {0, 0x8d, "SystemMenuDown"}, 97 {0, 0x90, "D-PadUp"}, 98 {0, 0x91, "D-PadDown"}, 99 {0, 0x92, "D-PadRight"}, 100 {0, 0x93, "D-PadLeft"}, 101 { 2, 0, "Simulation" }, 102 {0, 0xb0, "Aileron"}, 103 {0, 0xb1, "AileronTrim"}, 104 {0, 0xb2, "Anti-Torque"}, 105 {0, 0xb3, "Autopilot"}, 106 {0, 0xb4, "Chaff"}, 107 {0, 0xb5, "Collective"}, 108 {0, 0xb6, "DiveBrake"}, 109 {0, 0xb7, "ElectronicCountermeasures"}, 110 {0, 0xb8, "Elevator"}, 111 {0, 0xb9, "ElevatorTrim"}, 112 {0, 0xba, "Rudder"}, 113 {0, 0xbb, "Throttle"}, 114 {0, 0xbc, "FlightCommunications"}, 115 {0, 0xbd, "FlareRelease"}, 116 {0, 0xbe, "LandingGear"}, 117 {0, 0xbf, "ToeBrake"}, 118 { 6, 0, "GenericDeviceControls" }, 119 {0, 0x20, "BatteryStrength" }, 120 {0, 0x21, "WirelessChannel" }, 121 {0, 0x22, "WirelessID" }, 122 {0, 0x23, "DiscoverWirelessControl" }, 123 {0, 0x24, "SecurityCodeCharacterEntered" }, 124 {0, 0x25, "SecurityCodeCharactedErased" }, 125 {0, 0x26, "SecurityCodeCleared" }, 126 { 7, 0, "Keyboard" }, 127 { 8, 0, "LED" }, 128 {0, 0x01, "NumLock"}, 129 {0, 0x02, "CapsLock"}, 130 {0, 0x03, "ScrollLock"}, 131 {0, 0x04, "Compose"}, 132 {0, 0x05, "Kana"}, 133 {0, 0x4b, "GenericIndicator"}, 134 { 9, 0, "Button" }, 135 { 10, 0, "Ordinal" }, 136 { 12, 0, "Consumer" }, 137 {0, 0x238, "HorizontalWheel"}, 138 { 13, 0, "Digitizers" }, 139 {0, 0x01, "Digitizer"}, 140 {0, 0x02, "Pen"}, 141 {0, 0x03, "LightPen"}, 142 {0, 0x04, "TouchScreen"}, 143 {0, 0x05, "TouchPad"}, 144 {0, 0x0e, "DeviceConfiguration"}, 145 {0, 0x20, "Stylus"}, 146 {0, 0x21, "Puck"}, 147 {0, 0x22, "Finger"}, 148 {0, 0x23, "DeviceSettings"}, 149 {0, 0x30, "TipPressure"}, 150 {0, 0x31, "BarrelPressure"}, 151 {0, 0x32, "InRange"}, 152 {0, 0x33, "Touch"}, 153 {0, 0x34, "UnTouch"}, 154 {0, 0x35, "Tap"}, 155 {0, 0x39, "TabletFunctionKey"}, 156 {0, 0x3a, "ProgramChangeKey"}, 157 {0, 0x3c, "Invert"}, 158 {0, 0x42, "TipSwitch"}, 159 {0, 0x43, "SecondaryTipSwitch"}, 160 {0, 0x44, "BarrelSwitch"}, 161 {0, 0x45, "Eraser"}, 162 {0, 0x46, "TabletPick"}, 163 {0, 0x47, "Confidence"}, 164 {0, 0x48, "Width"}, 165 {0, 0x49, "Height"}, 166 {0, 0x51, "ContactID"}, 167 {0, 0x52, "InputMode"}, 168 {0, 0x53, "DeviceIndex"}, 169 {0, 0x54, "ContactCount"}, 170 {0, 0x55, "ContactMaximumNumber"}, 171 {0, 0x59, "ButtonType"}, 172 {0, 0x5A, "SecondaryBarrelSwitch"}, 173 {0, 0x5B, "TransducerSerialNumber"}, 174 { 15, 0, "PhysicalInterfaceDevice" }, 175 {0, 0x00, "Undefined"}, 176 {0, 0x01, "Physical_Interface_Device"}, 177 {0, 0x20, "Normal"}, 178 {0, 0x21, "Set_Effect_Report"}, 179 {0, 0x22, "Effect_Block_Index"}, 180 {0, 0x23, "Parameter_Block_Offset"}, 181 {0, 0x24, "ROM_Flag"}, 182 {0, 0x25, "Effect_Type"}, 183 {0, 0x26, "ET_Constant_Force"}, 184 {0, 0x27, "ET_Ramp"}, 185 {0, 0x28, "ET_Custom_Force_Data"}, 186 {0, 0x30, "ET_Square"}, 187 {0, 0x31, "ET_Sine"}, 188 {0, 0x32, "ET_Triangle"}, 189 {0, 0x33, "ET_Sawtooth_Up"}, 190 {0, 0x34, "ET_Sawtooth_Down"}, 191 {0, 0x40, "ET_Spring"}, 192 {0, 0x41, "ET_Damper"}, 193 {0, 0x42, "ET_Inertia"}, 194 {0, 0x43, "ET_Friction"}, 195 {0, 0x50, "Duration"}, 196 {0, 0x51, "Sample_Period"}, 197 {0, 0x52, "Gain"}, 198 {0, 0x53, "Trigger_Button"}, 199 {0, 0x54, "Trigger_Repeat_Interval"}, 200 {0, 0x55, "Axes_Enable"}, 201 {0, 0x56, "Direction_Enable"}, 202 {0, 0x57, "Direction"}, 203 {0, 0x58, "Type_Specific_Block_Offset"}, 204 {0, 0x59, "Block_Type"}, 205 {0, 0x5A, "Set_Envelope_Report"}, 206 {0, 0x5B, "Attack_Level"}, 207 {0, 0x5C, "Attack_Time"}, 208 {0, 0x5D, "Fade_Level"}, 209 {0, 0x5E, "Fade_Time"}, 210 {0, 0x5F, "Set_Condition_Report"}, 211 {0, 0x60, "CP_Offset"}, 212 {0, 0x61, "Positive_Coefficient"}, 213 {0, 0x62, "Negative_Coefficient"}, 214 {0, 0x63, "Positive_Saturation"}, 215 {0, 0x64, "Negative_Saturation"}, 216 {0, 0x65, "Dead_Band"}, 217 {0, 0x66, "Download_Force_Sample"}, 218 {0, 0x67, "Isoch_Custom_Force_Enable"}, 219 {0, 0x68, "Custom_Force_Data_Report"}, 220 {0, 0x69, "Custom_Force_Data"}, 221 {0, 0x6A, "Custom_Force_Vendor_Defined_Data"}, 222 {0, 0x6B, "Set_Custom_Force_Report"}, 223 {0, 0x6C, "Custom_Force_Data_Offset"}, 224 {0, 0x6D, "Sample_Count"}, 225 {0, 0x6E, "Set_Periodic_Report"}, 226 {0, 0x6F, "Offset"}, 227 {0, 0x70, "Magnitude"}, 228 {0, 0x71, "Phase"}, 229 {0, 0x72, "Period"}, 230 {0, 0x73, "Set_Constant_Force_Report"}, 231 {0, 0x74, "Set_Ramp_Force_Report"}, 232 {0, 0x75, "Ramp_Start"}, 233 {0, 0x76, "Ramp_End"}, 234 {0, 0x77, "Effect_Operation_Report"}, 235 {0, 0x78, "Effect_Operation"}, 236 {0, 0x79, "Op_Effect_Start"}, 237 {0, 0x7A, "Op_Effect_Start_Solo"}, 238 {0, 0x7B, "Op_Effect_Stop"}, 239 {0, 0x7C, "Loop_Count"}, 240 {0, 0x7D, "Device_Gain_Report"}, 241 {0, 0x7E, "Device_Gain"}, 242 {0, 0x7F, "PID_Pool_Report"}, 243 {0, 0x80, "RAM_Pool_Size"}, 244 {0, 0x81, "ROM_Pool_Size"}, 245 {0, 0x82, "ROM_Effect_Block_Count"}, 246 {0, 0x83, "Simultaneous_Effects_Max"}, 247 {0, 0x84, "Pool_Alignment"}, 248 {0, 0x85, "PID_Pool_Move_Report"}, 249 {0, 0x86, "Move_Source"}, 250 {0, 0x87, "Move_Destination"}, 251 {0, 0x88, "Move_Length"}, 252 {0, 0x89, "PID_Block_Load_Report"}, 253 {0, 0x8B, "Block_Load_Status"}, 254 {0, 0x8C, "Block_Load_Success"}, 255 {0, 0x8D, "Block_Load_Full"}, 256 {0, 0x8E, "Block_Load_Error"}, 257 {0, 0x8F, "Block_Handle"}, 258 {0, 0x90, "PID_Block_Free_Report"}, 259 {0, 0x91, "Type_Specific_Block_Handle"}, 260 {0, 0x92, "PID_State_Report"}, 261 {0, 0x94, "Effect_Playing"}, 262 {0, 0x95, "PID_Device_Control_Report"}, 263 {0, 0x96, "PID_Device_Control"}, 264 {0, 0x97, "DC_Enable_Actuators"}, 265 {0, 0x98, "DC_Disable_Actuators"}, 266 {0, 0x99, "DC_Stop_All_Effects"}, 267 {0, 0x9A, "DC_Device_Reset"}, 268 {0, 0x9B, "DC_Device_Pause"}, 269 {0, 0x9C, "DC_Device_Continue"}, 270 {0, 0x9F, "Device_Paused"}, 271 {0, 0xA0, "Actuators_Enabled"}, 272 {0, 0xA4, "Safety_Switch"}, 273 {0, 0xA5, "Actuator_Override_Switch"}, 274 {0, 0xA6, "Actuator_Power"}, 275 {0, 0xA7, "Start_Delay"}, 276 {0, 0xA8, "Parameter_Block_Size"}, 277 {0, 0xA9, "Device_Managed_Pool"}, 278 {0, 0xAA, "Shared_Parameter_Blocks"}, 279 {0, 0xAB, "Create_New_Effect_Report"}, 280 {0, 0xAC, "RAM_Pool_Available"}, 281 { 0x20, 0, "Sensor" }, 282 { 0x20, 0x01, "Sensor" }, 283 { 0x20, 0x10, "Biometric" }, 284 { 0x20, 0x11, "BiometricHumanPresence" }, 285 { 0x20, 0x12, "BiometricHumanProximity" }, 286 { 0x20, 0x13, "BiometricHumanTouch" }, 287 { 0x20, 0x20, "Electrical" }, 288 { 0x20, 0x21, "ElectricalCapacitance" }, 289 { 0x20, 0x22, "ElectricalCurrent" }, 290 { 0x20, 0x23, "ElectricalPower" }, 291 { 0x20, 0x24, "ElectricalInductance" }, 292 { 0x20, 0x25, "ElectricalResistance" }, 293 { 0x20, 0x26, "ElectricalVoltage" }, 294 { 0x20, 0x27, "ElectricalPoteniometer" }, 295 { 0x20, 0x28, "ElectricalFrequency" }, 296 { 0x20, 0x29, "ElectricalPeriod" }, 297 { 0x20, 0x30, "Environmental" }, 298 { 0x20, 0x31, "EnvironmentalAtmosphericPressure" }, 299 { 0x20, 0x32, "EnvironmentalHumidity" }, 300 { 0x20, 0x33, "EnvironmentalTemperature" }, 301 { 0x20, 0x34, "EnvironmentalWindDirection" }, 302 { 0x20, 0x35, "EnvironmentalWindSpeed" }, 303 { 0x20, 0x40, "Light" }, 304 { 0x20, 0x41, "LightAmbientLight" }, 305 { 0x20, 0x42, "LightConsumerInfrared" }, 306 { 0x20, 0x50, "Location" }, 307 { 0x20, 0x51, "LocationBroadcast" }, 308 { 0x20, 0x52, "LocationDeadReckoning" }, 309 { 0x20, 0x53, "LocationGPS" }, 310 { 0x20, 0x54, "LocationLookup" }, 311 { 0x20, 0x55, "LocationOther" }, 312 { 0x20, 0x56, "LocationStatic" }, 313 { 0x20, 0x57, "LocationTriangulation" }, 314 { 0x20, 0x60, "Mechanical" }, 315 { 0x20, 0x61, "MechanicalBooleanSwitch" }, 316 { 0x20, 0x62, "MechanicalBooleanSwitchArray" }, 317 { 0x20, 0x63, "MechanicalMultivalueSwitch" }, 318 { 0x20, 0x64, "MechanicalForce" }, 319 { 0x20, 0x65, "MechanicalPressure" }, 320 { 0x20, 0x66, "MechanicalStrain" }, 321 { 0x20, 0x67, "MechanicalWeight" }, 322 { 0x20, 0x68, "MechanicalHapticVibrator" }, 323 { 0x20, 0x69, "MechanicalHallEffectSwitch" }, 324 { 0x20, 0x70, "Motion" }, 325 { 0x20, 0x71, "MotionAccelerometer1D" }, 326 { 0x20, 0x72, "MotionAccelerometer2D" }, 327 { 0x20, 0x73, "MotionAccelerometer3D" }, 328 { 0x20, 0x74, "MotionGyrometer1D" }, 329 { 0x20, 0x75, "MotionGyrometer2D" }, 330 { 0x20, 0x76, "MotionGyrometer3D" }, 331 { 0x20, 0x77, "MotionMotionDetector" }, 332 { 0x20, 0x78, "MotionSpeedometer" }, 333 { 0x20, 0x79, "MotionAccelerometer" }, 334 { 0x20, 0x7A, "MotionGyrometer" }, 335 { 0x20, 0x80, "Orientation" }, 336 { 0x20, 0x81, "OrientationCompass1D" }, 337 { 0x20, 0x82, "OrientationCompass2D" }, 338 { 0x20, 0x83, "OrientationCompass3D" }, 339 { 0x20, 0x84, "OrientationInclinometer1D" }, 340 { 0x20, 0x85, "OrientationInclinometer2D" }, 341 { 0x20, 0x86, "OrientationInclinometer3D" }, 342 { 0x20, 0x87, "OrientationDistance1D" }, 343 { 0x20, 0x88, "OrientationDistance2D" }, 344 { 0x20, 0x89, "OrientationDistance3D" }, 345 { 0x20, 0x8A, "OrientationDeviceOrientation" }, 346 { 0x20, 0x8B, "OrientationCompass" }, 347 { 0x20, 0x8C, "OrientationInclinometer" }, 348 { 0x20, 0x8D, "OrientationDistance" }, 349 { 0x20, 0x90, "Scanner" }, 350 { 0x20, 0x91, "ScannerBarcode" }, 351 { 0x20, 0x91, "ScannerRFID" }, 352 { 0x20, 0x91, "ScannerNFC" }, 353 { 0x20, 0xA0, "Time" }, 354 { 0x20, 0xA1, "TimeAlarmTimer" }, 355 { 0x20, 0xA2, "TimeRealTimeClock" }, 356 { 0x20, 0xE0, "Other" }, 357 { 0x20, 0xE1, "OtherCustom" }, 358 { 0x20, 0xE2, "OtherGeneric" }, 359 { 0x20, 0xE3, "OtherGenericEnumerator" }, 360 { 0x84, 0, "Power Device" }, 361 { 0x84, 0x02, "PresentStatus" }, 362 { 0x84, 0x03, "ChangeStatus" }, 363 { 0x84, 0x04, "UPS" }, 364 { 0x84, 0x05, "PowerSupply" }, 365 { 0x84, 0x10, "BatterySystem" }, 366 { 0x84, 0x11, "BatterySystemID" }, 367 { 0x84, 0x12, "Battery" }, 368 { 0x84, 0x13, "BatteryID" }, 369 { 0x84, 0x14, "Charger" }, 370 { 0x84, 0x15, "ChargerID" }, 371 { 0x84, 0x16, "PowerConverter" }, 372 { 0x84, 0x17, "PowerConverterID" }, 373 { 0x84, 0x18, "OutletSystem" }, 374 { 0x84, 0x19, "OutletSystemID" }, 375 { 0x84, 0x1a, "Input" }, 376 { 0x84, 0x1b, "InputID" }, 377 { 0x84, 0x1c, "Output" }, 378 { 0x84, 0x1d, "OutputID" }, 379 { 0x84, 0x1e, "Flow" }, 380 { 0x84, 0x1f, "FlowID" }, 381 { 0x84, 0x20, "Outlet" }, 382 { 0x84, 0x21, "OutletID" }, 383 { 0x84, 0x22, "Gang" }, 384 { 0x84, 0x24, "PowerSummary" }, 385 { 0x84, 0x25, "PowerSummaryID" }, 386 { 0x84, 0x30, "Voltage" }, 387 { 0x84, 0x31, "Current" }, 388 { 0x84, 0x32, "Frequency" }, 389 { 0x84, 0x33, "ApparentPower" }, 390 { 0x84, 0x35, "PercentLoad" }, 391 { 0x84, 0x40, "ConfigVoltage" }, 392 { 0x84, 0x41, "ConfigCurrent" }, 393 { 0x84, 0x43, "ConfigApparentPower" }, 394 { 0x84, 0x53, "LowVoltageTransfer" }, 395 { 0x84, 0x54, "HighVoltageTransfer" }, 396 { 0x84, 0x56, "DelayBeforeStartup" }, 397 { 0x84, 0x57, "DelayBeforeShutdown" }, 398 { 0x84, 0x58, "Test" }, 399 { 0x84, 0x5a, "AudibleAlarmControl" }, 400 { 0x84, 0x60, "Present" }, 401 { 0x84, 0x61, "Good" }, 402 { 0x84, 0x62, "InternalFailure" }, 403 { 0x84, 0x65, "Overload" }, 404 { 0x84, 0x66, "OverCharged" }, 405 { 0x84, 0x67, "OverTemperature" }, 406 { 0x84, 0x68, "ShutdownRequested" }, 407 { 0x84, 0x69, "ShutdownImminent" }, 408 { 0x84, 0x6b, "SwitchOn/Off" }, 409 { 0x84, 0x6c, "Switchable" }, 410 { 0x84, 0x6d, "Used" }, 411 { 0x84, 0x6e, "Boost" }, 412 { 0x84, 0x73, "CommunicationLost" }, 413 { 0x84, 0xfd, "iManufacturer" }, 414 { 0x84, 0xfe, "iProduct" }, 415 { 0x84, 0xff, "iSerialNumber" }, 416 { 0x85, 0, "Battery System" }, 417 { 0x85, 0x01, "SMBBatteryMode" }, 418 { 0x85, 0x02, "SMBBatteryStatus" }, 419 { 0x85, 0x03, "SMBAlarmWarning" }, 420 { 0x85, 0x04, "SMBChargerMode" }, 421 { 0x85, 0x05, "SMBChargerStatus" }, 422 { 0x85, 0x06, "SMBChargerSpecInfo" }, 423 { 0x85, 0x07, "SMBSelectorState" }, 424 { 0x85, 0x08, "SMBSelectorPresets" }, 425 { 0x85, 0x09, "SMBSelectorInfo" }, 426 { 0x85, 0x29, "RemainingCapacityLimit" }, 427 { 0x85, 0x2c, "CapacityMode" }, 428 { 0x85, 0x42, "BelowRemainingCapacityLimit" }, 429 { 0x85, 0x44, "Charging" }, 430 { 0x85, 0x45, "Discharging" }, 431 { 0x85, 0x4b, "NeedReplacement" }, 432 { 0x85, 0x66, "RemainingCapacity" }, 433 { 0x85, 0x68, "RunTimeToEmpty" }, 434 { 0x85, 0x6a, "AverageTimeToFull" }, 435 { 0x85, 0x83, "DesignCapacity" }, 436 { 0x85, 0x85, "ManufacturerDate" }, 437 { 0x85, 0x89, "iDeviceChemistry" }, 438 { 0x85, 0x8b, "Rechargeable" }, 439 { 0x85, 0x8f, "iOEMInformation" }, 440 { 0x85, 0x8d, "CapacityGranularity1" }, 441 { 0x85, 0xd0, "ACPresent" }, 442 /* pages 0xff00 to 0xffff are vendor-specific */ 443 { 0xffff, 0, "Vendor-specific-FF" }, 444 { 0, 0, NULL } 445 }; 446 447 /* Either output directly into simple seq_file, or (if f == NULL) 448 * allocate a separate buffer that will then be passed to the 'events' 449 * ringbuffer. 450 * 451 * This is because these functions can be called both for "one-shot" 452 * "rdesc" while resolving, or for blocking "events". 453 * 454 * This holds both for resolv_usage_page() and hid_resolv_usage(). 455 */ 456 static char *resolv_usage_page(unsigned page, struct seq_file *f) { 457 const struct hid_usage_entry *p; 458 char *buf = NULL; 459 460 if (!f) { 461 buf = kzalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC); 462 if (!buf) 463 return ERR_PTR(-ENOMEM); 464 } 465 466 for (p = hid_usage_table; p->description; p++) 467 if (p->page == page) { 468 if (!f) { 469 snprintf(buf, HID_DEBUG_BUFSIZE, "%s", 470 p->description); 471 return buf; 472 } 473 else { 474 seq_printf(f, "%s", p->description); 475 return NULL; 476 } 477 } 478 if (!f) 479 snprintf(buf, HID_DEBUG_BUFSIZE, "%04x", page); 480 else 481 seq_printf(f, "%04x", page); 482 return buf; 483 } 484 485 char *hid_resolv_usage(unsigned usage, struct seq_file *f) { 486 const struct hid_usage_entry *p; 487 char *buf = NULL; 488 int len = 0; 489 490 buf = resolv_usage_page(usage >> 16, f); 491 if (IS_ERR(buf)) { 492 pr_err("error allocating HID debug buffer\n"); 493 return NULL; 494 } 495 496 497 if (!f) { 498 len = strlen(buf); 499 snprintf(buf+len, max(0, HID_DEBUG_BUFSIZE - len), "."); 500 len++; 501 } 502 else { 503 seq_printf(f, "."); 504 } 505 for (p = hid_usage_table; p->description; p++) 506 if (p->page == (usage >> 16)) { 507 for(++p; p->description && p->usage != 0; p++) 508 if (p->usage == (usage & 0xffff)) { 509 if (!f) 510 snprintf(buf + len, 511 max(0,HID_DEBUG_BUFSIZE - len - 1), 512 "%s", p->description); 513 else 514 seq_printf(f, 515 "%s", 516 p->description); 517 return buf; 518 } 519 break; 520 } 521 if (!f) 522 snprintf(buf + len, max(0, HID_DEBUG_BUFSIZE - len - 1), 523 "%04x", usage & 0xffff); 524 else 525 seq_printf(f, "%04x", usage & 0xffff); 526 return buf; 527 } 528 EXPORT_SYMBOL_GPL(hid_resolv_usage); 529 530 static void tab(int n, struct seq_file *f) { 531 seq_printf(f, "%*s", n, ""); 532 } 533 534 void hid_dump_field(struct hid_field *field, int n, struct seq_file *f) { 535 int j; 536 537 if (field->physical) { 538 tab(n, f); 539 seq_printf(f, "Physical("); 540 hid_resolv_usage(field->physical, f); seq_printf(f, ")\n"); 541 } 542 if (field->logical) { 543 tab(n, f); 544 seq_printf(f, "Logical("); 545 hid_resolv_usage(field->logical, f); seq_printf(f, ")\n"); 546 } 547 if (field->application) { 548 tab(n, f); 549 seq_printf(f, "Application("); 550 hid_resolv_usage(field->application, f); seq_printf(f, ")\n"); 551 } 552 tab(n, f); seq_printf(f, "Usage(%d)\n", field->maxusage); 553 for (j = 0; j < field->maxusage; j++) { 554 tab(n+2, f); hid_resolv_usage(field->usage[j].hid, f); seq_printf(f, "\n"); 555 } 556 if (field->logical_minimum != field->logical_maximum) { 557 tab(n, f); seq_printf(f, "Logical Minimum(%d)\n", field->logical_minimum); 558 tab(n, f); seq_printf(f, "Logical Maximum(%d)\n", field->logical_maximum); 559 } 560 if (field->physical_minimum != field->physical_maximum) { 561 tab(n, f); seq_printf(f, "Physical Minimum(%d)\n", field->physical_minimum); 562 tab(n, f); seq_printf(f, "Physical Maximum(%d)\n", field->physical_maximum); 563 } 564 if (field->unit_exponent) { 565 tab(n, f); seq_printf(f, "Unit Exponent(%d)\n", field->unit_exponent); 566 } 567 if (field->unit) { 568 static const char *systems[5] = { "None", "SI Linear", "SI Rotation", "English Linear", "English Rotation" }; 569 static const char *units[5][8] = { 570 { "None", "None", "None", "None", "None", "None", "None", "None" }, 571 { "None", "Centimeter", "Gram", "Seconds", "Kelvin", "Ampere", "Candela", "None" }, 572 { "None", "Radians", "Gram", "Seconds", "Kelvin", "Ampere", "Candela", "None" }, 573 { "None", "Inch", "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" }, 574 { "None", "Degrees", "Slug", "Seconds", "Fahrenheit", "Ampere", "Candela", "None" } 575 }; 576 577 int i; 578 int sys; 579 __u32 data = field->unit; 580 581 /* First nibble tells us which system we're in. */ 582 sys = data & 0xf; 583 data >>= 4; 584 585 if(sys > 4) { 586 tab(n, f); seq_printf(f, "Unit(Invalid)\n"); 587 } 588 else { 589 int earlier_unit = 0; 590 591 tab(n, f); seq_printf(f, "Unit(%s : ", systems[sys]); 592 593 for (i=1 ; i<sizeof(__u32)*2 ; i++) { 594 char nibble = data & 0xf; 595 data >>= 4; 596 if (nibble != 0) { 597 if(earlier_unit++ > 0) 598 seq_printf(f, "*"); 599 seq_printf(f, "%s", units[sys][i]); 600 if(nibble != 1) { 601 /* This is a _signed_ nibble(!) */ 602 603 int val = nibble & 0x7; 604 if(nibble & 0x08) 605 val = -((0x7 & ~val) +1); 606 seq_printf(f, "^%d", val); 607 } 608 } 609 } 610 seq_printf(f, ")\n"); 611 } 612 } 613 tab(n, f); seq_printf(f, "Report Size(%u)\n", field->report_size); 614 tab(n, f); seq_printf(f, "Report Count(%u)\n", field->report_count); 615 tab(n, f); seq_printf(f, "Report Offset(%u)\n", field->report_offset); 616 617 tab(n, f); seq_printf(f, "Flags( "); 618 j = field->flags; 619 seq_printf(f, "%s", HID_MAIN_ITEM_CONSTANT & j ? "Constant " : ""); 620 seq_printf(f, "%s", HID_MAIN_ITEM_VARIABLE & j ? "Variable " : "Array "); 621 seq_printf(f, "%s", HID_MAIN_ITEM_RELATIVE & j ? "Relative " : "Absolute "); 622 seq_printf(f, "%s", HID_MAIN_ITEM_WRAP & j ? "Wrap " : ""); 623 seq_printf(f, "%s", HID_MAIN_ITEM_NONLINEAR & j ? "NonLinear " : ""); 624 seq_printf(f, "%s", HID_MAIN_ITEM_NO_PREFERRED & j ? "NoPreferredState " : ""); 625 seq_printf(f, "%s", HID_MAIN_ITEM_NULL_STATE & j ? "NullState " : ""); 626 seq_printf(f, "%s", HID_MAIN_ITEM_VOLATILE & j ? "Volatile " : ""); 627 seq_printf(f, "%s", HID_MAIN_ITEM_BUFFERED_BYTE & j ? "BufferedByte " : ""); 628 seq_printf(f, ")\n"); 629 } 630 EXPORT_SYMBOL_GPL(hid_dump_field); 631 632 void hid_dump_device(struct hid_device *device, struct seq_file *f) 633 { 634 struct hid_report_enum *report_enum; 635 struct hid_report *report; 636 struct list_head *list; 637 unsigned i,k; 638 static const char *table[] = {"INPUT", "OUTPUT", "FEATURE"}; 639 640 for (i = 0; i < HID_REPORT_TYPES; i++) { 641 report_enum = device->report_enum + i; 642 list = report_enum->report_list.next; 643 while (list != &report_enum->report_list) { 644 report = (struct hid_report *) list; 645 tab(2, f); 646 seq_printf(f, "%s", table[i]); 647 if (report->id) 648 seq_printf(f, "(%d)", report->id); 649 seq_printf(f, "[%s]", table[report->type]); 650 seq_printf(f, "\n"); 651 for (k = 0; k < report->maxfield; k++) { 652 tab(4, f); 653 seq_printf(f, "Field(%d)\n", k); 654 hid_dump_field(report->field[k], 6, f); 655 } 656 list = list->next; 657 } 658 } 659 } 660 EXPORT_SYMBOL_GPL(hid_dump_device); 661 662 /* enqueue string to 'events' ring buffer */ 663 void hid_debug_event(struct hid_device *hdev, char *buf) 664 { 665 struct hid_debug_list *list; 666 unsigned long flags; 667 668 spin_lock_irqsave(&hdev->debug_list_lock, flags); 669 list_for_each_entry(list, &hdev->debug_list, node) 670 kfifo_in(&list->hid_debug_fifo, buf, strlen(buf)); 671 spin_unlock_irqrestore(&hdev->debug_list_lock, flags); 672 673 wake_up_interruptible(&hdev->debug_wait); 674 } 675 EXPORT_SYMBOL_GPL(hid_debug_event); 676 677 void hid_dump_report(struct hid_device *hid, int type, u8 *data, 678 int size) 679 { 680 struct hid_report_enum *report_enum; 681 char *buf; 682 unsigned int i; 683 684 buf = kmalloc(HID_DEBUG_BUFSIZE, GFP_ATOMIC); 685 686 if (!buf) 687 return; 688 689 report_enum = hid->report_enum + type; 690 691 /* dump the report */ 692 snprintf(buf, HID_DEBUG_BUFSIZE - 1, 693 "\nreport (size %u) (%snumbered) = ", size, 694 report_enum->numbered ? "" : "un"); 695 hid_debug_event(hid, buf); 696 697 for (i = 0; i < size; i++) { 698 snprintf(buf, HID_DEBUG_BUFSIZE - 1, 699 " %02x", data[i]); 700 hid_debug_event(hid, buf); 701 } 702 hid_debug_event(hid, "\n"); 703 kfree(buf); 704 } 705 EXPORT_SYMBOL_GPL(hid_dump_report); 706 707 void hid_dump_input(struct hid_device *hdev, struct hid_usage *usage, __s32 value) 708 { 709 char *buf; 710 int len; 711 712 buf = hid_resolv_usage(usage->hid, NULL); 713 if (!buf) 714 return; 715 len = strlen(buf); 716 snprintf(buf + len, HID_DEBUG_BUFSIZE - len - 1, " = %d\n", value); 717 718 hid_debug_event(hdev, buf); 719 720 kfree(buf); 721 wake_up_interruptible(&hdev->debug_wait); 722 } 723 EXPORT_SYMBOL_GPL(hid_dump_input); 724 725 static const char *events[EV_MAX + 1] = { 726 [EV_SYN] = "Sync", [EV_KEY] = "Key", 727 [EV_REL] = "Relative", [EV_ABS] = "Absolute", 728 [EV_MSC] = "Misc", [EV_LED] = "LED", 729 [EV_SND] = "Sound", [EV_REP] = "Repeat", 730 [EV_FF] = "ForceFeedback", [EV_PWR] = "Power", 731 [EV_FF_STATUS] = "ForceFeedbackStatus", 732 }; 733 734 static const char *syncs[3] = { 735 [SYN_REPORT] = "Report", [SYN_CONFIG] = "Config", 736 [SYN_MT_REPORT] = "MT Report", 737 }; 738 739 static const char *keys[KEY_MAX + 1] = { 740 [KEY_RESERVED] = "Reserved", [KEY_ESC] = "Esc", 741 [KEY_1] = "1", [KEY_2] = "2", 742 [KEY_3] = "3", [KEY_4] = "4", 743 [KEY_5] = "5", [KEY_6] = "6", 744 [KEY_7] = "7", [KEY_8] = "8", 745 [KEY_9] = "9", [KEY_0] = "0", 746 [KEY_MINUS] = "Minus", [KEY_EQUAL] = "Equal", 747 [KEY_BACKSPACE] = "Backspace", [KEY_TAB] = "Tab", 748 [KEY_Q] = "Q", [KEY_W] = "W", 749 [KEY_E] = "E", [KEY_R] = "R", 750 [KEY_T] = "T", [KEY_Y] = "Y", 751 [KEY_U] = "U", [KEY_I] = "I", 752 [KEY_O] = "O", [KEY_P] = "P", 753 [KEY_LEFTBRACE] = "LeftBrace", [KEY_RIGHTBRACE] = "RightBrace", 754 [KEY_ENTER] = "Enter", [KEY_LEFTCTRL] = "LeftControl", 755 [KEY_A] = "A", [KEY_S] = "S", 756 [KEY_D] = "D", [KEY_F] = "F", 757 [KEY_G] = "G", [KEY_H] = "H", 758 [KEY_J] = "J", [KEY_K] = "K", 759 [KEY_L] = "L", [KEY_SEMICOLON] = "Semicolon", 760 [KEY_APOSTROPHE] = "Apostrophe", [KEY_GRAVE] = "Grave", 761 [KEY_LEFTSHIFT] = "LeftShift", [KEY_BACKSLASH] = "BackSlash", 762 [KEY_Z] = "Z", [KEY_X] = "X", 763 [KEY_C] = "C", [KEY_V] = "V", 764 [KEY_B] = "B", [KEY_N] = "N", 765 [KEY_M] = "M", [KEY_COMMA] = "Comma", 766 [KEY_DOT] = "Dot", [KEY_SLASH] = "Slash", 767 [KEY_RIGHTSHIFT] = "RightShift", [KEY_KPASTERISK] = "KPAsterisk", 768 [KEY_LEFTALT] = "LeftAlt", [KEY_SPACE] = "Space", 769 [KEY_CAPSLOCK] = "CapsLock", [KEY_F1] = "F1", 770 [KEY_F2] = "F2", [KEY_F3] = "F3", 771 [KEY_F4] = "F4", [KEY_F5] = "F5", 772 [KEY_F6] = "F6", [KEY_F7] = "F7", 773 [KEY_F8] = "F8", [KEY_F9] = "F9", 774 [KEY_F10] = "F10", [KEY_NUMLOCK] = "NumLock", 775 [KEY_SCROLLLOCK] = "ScrollLock", [KEY_KP7] = "KP7", 776 [KEY_KP8] = "KP8", [KEY_KP9] = "KP9", 777 [KEY_KPMINUS] = "KPMinus", [KEY_KP4] = "KP4", 778 [KEY_KP5] = "KP5", [KEY_KP6] = "KP6", 779 [KEY_KPPLUS] = "KPPlus", [KEY_KP1] = "KP1", 780 [KEY_KP2] = "KP2", [KEY_KP3] = "KP3", 781 [KEY_KP0] = "KP0", [KEY_KPDOT] = "KPDot", 782 [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd", 783 [KEY_F11] = "F11", [KEY_F12] = "F12", 784 [KEY_RO] = "RO", [KEY_KATAKANA] = "Katakana", 785 [KEY_HIRAGANA] = "HIRAGANA", [KEY_HENKAN] = "Henkan", 786 [KEY_KATAKANAHIRAGANA] = "Katakana/Hiragana", [KEY_MUHENKAN] = "Muhenkan", 787 [KEY_KPJPCOMMA] = "KPJpComma", [KEY_KPENTER] = "KPEnter", 788 [KEY_RIGHTCTRL] = "RightCtrl", [KEY_KPSLASH] = "KPSlash", 789 [KEY_SYSRQ] = "SysRq", [KEY_RIGHTALT] = "RightAlt", 790 [KEY_LINEFEED] = "LineFeed", [KEY_HOME] = "Home", 791 [KEY_UP] = "Up", [KEY_PAGEUP] = "PageUp", 792 [KEY_LEFT] = "Left", [KEY_RIGHT] = "Right", 793 [KEY_END] = "End", [KEY_DOWN] = "Down", 794 [KEY_PAGEDOWN] = "PageDown", [KEY_INSERT] = "Insert", 795 [KEY_DELETE] = "Delete", [KEY_MACRO] = "Macro", 796 [KEY_MUTE] = "Mute", [KEY_VOLUMEDOWN] = "VolumeDown", 797 [KEY_VOLUMEUP] = "VolumeUp", [KEY_POWER] = "Power", 798 [KEY_KPEQUAL] = "KPEqual", [KEY_KPPLUSMINUS] = "KPPlusMinus", 799 [KEY_PAUSE] = "Pause", [KEY_KPCOMMA] = "KPComma", 800 [KEY_HANGUEL] = "Hangeul", [KEY_HANJA] = "Hanja", 801 [KEY_YEN] = "Yen", [KEY_LEFTMETA] = "LeftMeta", 802 [KEY_RIGHTMETA] = "RightMeta", [KEY_COMPOSE] = "Compose", 803 [KEY_STOP] = "Stop", [KEY_AGAIN] = "Again", 804 [KEY_PROPS] = "Props", [KEY_UNDO] = "Undo", 805 [KEY_FRONT] = "Front", [KEY_COPY] = "Copy", 806 [KEY_OPEN] = "Open", [KEY_PASTE] = "Paste", 807 [KEY_FIND] = "Find", [KEY_CUT] = "Cut", 808 [KEY_HELP] = "Help", [KEY_MENU] = "Menu", 809 [KEY_CALC] = "Calc", [KEY_SETUP] = "Setup", 810 [KEY_SLEEP] = "Sleep", [KEY_WAKEUP] = "WakeUp", 811 [KEY_FILE] = "File", [KEY_SENDFILE] = "SendFile", 812 [KEY_DELETEFILE] = "DeleteFile", [KEY_XFER] = "X-fer", 813 [KEY_PROG1] = "Prog1", [KEY_PROG2] = "Prog2", 814 [KEY_WWW] = "WWW", [KEY_MSDOS] = "MSDOS", 815 [KEY_COFFEE] = "Coffee", [KEY_ROTATE_DISPLAY] = "RotateDisplay", 816 [KEY_CYCLEWINDOWS] = "CycleWindows", [KEY_MAIL] = "Mail", 817 [KEY_BOOKMARKS] = "Bookmarks", [KEY_COMPUTER] = "Computer", 818 [KEY_BACK] = "Back", [KEY_FORWARD] = "Forward", 819 [KEY_CLOSECD] = "CloseCD", [KEY_EJECTCD] = "EjectCD", 820 [KEY_EJECTCLOSECD] = "EjectCloseCD", [KEY_NEXTSONG] = "NextSong", 821 [KEY_PLAYPAUSE] = "PlayPause", [KEY_PREVIOUSSONG] = "PreviousSong", 822 [KEY_STOPCD] = "StopCD", [KEY_RECORD] = "Record", 823 [KEY_REWIND] = "Rewind", [KEY_PHONE] = "Phone", 824 [KEY_ISO] = "ISOKey", [KEY_CONFIG] = "Config", 825 [KEY_HOMEPAGE] = "HomePage", [KEY_REFRESH] = "Refresh", 826 [KEY_EXIT] = "Exit", [KEY_MOVE] = "Move", 827 [KEY_EDIT] = "Edit", [KEY_SCROLLUP] = "ScrollUp", 828 [KEY_SCROLLDOWN] = "ScrollDown", [KEY_KPLEFTPAREN] = "KPLeftParenthesis", 829 [KEY_KPRIGHTPAREN] = "KPRightParenthesis", [KEY_NEW] = "New", 830 [KEY_REDO] = "Redo", [KEY_F13] = "F13", 831 [KEY_F14] = "F14", [KEY_F15] = "F15", 832 [KEY_F16] = "F16", [KEY_F17] = "F17", 833 [KEY_F18] = "F18", [KEY_F19] = "F19", 834 [KEY_F20] = "F20", [KEY_F21] = "F21", 835 [KEY_F22] = "F22", [KEY_F23] = "F23", 836 [KEY_F24] = "F24", [KEY_PLAYCD] = "PlayCD", 837 [KEY_PAUSECD] = "PauseCD", [KEY_PROG3] = "Prog3", 838 [KEY_PROG4] = "Prog4", [KEY_SUSPEND] = "Suspend", 839 [KEY_CLOSE] = "Close", [KEY_PLAY] = "Play", 840 [KEY_FASTFORWARD] = "FastForward", [KEY_BASSBOOST] = "BassBoost", 841 [KEY_PRINT] = "Print", [KEY_HP] = "HP", 842 [KEY_CAMERA] = "Camera", [KEY_SOUND] = "Sound", 843 [KEY_QUESTION] = "Question", [KEY_EMAIL] = "Email", 844 [KEY_CHAT] = "Chat", [KEY_SEARCH] = "Search", 845 [KEY_CONNECT] = "Connect", [KEY_FINANCE] = "Finance", 846 [KEY_SPORT] = "Sport", [KEY_SHOP] = "Shop", 847 [KEY_ALTERASE] = "AlternateErase", [KEY_CANCEL] = "Cancel", 848 [KEY_BRIGHTNESSDOWN] = "BrightnessDown", [KEY_BRIGHTNESSUP] = "BrightnessUp", 849 [KEY_MEDIA] = "Media", [KEY_UNKNOWN] = "Unknown", 850 [BTN_DPAD_UP] = "BtnDPadUp", [BTN_DPAD_DOWN] = "BtnDPadDown", 851 [BTN_DPAD_LEFT] = "BtnDPadLeft", [BTN_DPAD_RIGHT] = "BtnDPadRight", 852 [BTN_0] = "Btn0", [BTN_1] = "Btn1", 853 [BTN_2] = "Btn2", [BTN_3] = "Btn3", 854 [BTN_4] = "Btn4", [BTN_5] = "Btn5", 855 [BTN_6] = "Btn6", [BTN_7] = "Btn7", 856 [BTN_8] = "Btn8", [BTN_9] = "Btn9", 857 [BTN_LEFT] = "LeftBtn", [BTN_RIGHT] = "RightBtn", 858 [BTN_MIDDLE] = "MiddleBtn", [BTN_SIDE] = "SideBtn", 859 [BTN_EXTRA] = "ExtraBtn", [BTN_FORWARD] = "ForwardBtn", 860 [BTN_BACK] = "BackBtn", [BTN_TASK] = "TaskBtn", 861 [BTN_TRIGGER] = "Trigger", [BTN_THUMB] = "ThumbBtn", 862 [BTN_THUMB2] = "ThumbBtn2", [BTN_TOP] = "TopBtn", 863 [BTN_TOP2] = "TopBtn2", [BTN_PINKIE] = "PinkieBtn", 864 [BTN_BASE] = "BaseBtn", [BTN_BASE2] = "BaseBtn2", 865 [BTN_BASE3] = "BaseBtn3", [BTN_BASE4] = "BaseBtn4", 866 [BTN_BASE5] = "BaseBtn5", [BTN_BASE6] = "BaseBtn6", 867 [BTN_DEAD] = "BtnDead", [BTN_A] = "BtnA", 868 [BTN_B] = "BtnB", [BTN_C] = "BtnC", 869 [BTN_X] = "BtnX", [BTN_Y] = "BtnY", 870 [BTN_Z] = "BtnZ", [BTN_TL] = "BtnTL", 871 [BTN_TR] = "BtnTR", [BTN_TL2] = "BtnTL2", 872 [BTN_TR2] = "BtnTR2", [BTN_SELECT] = "BtnSelect", 873 [BTN_START] = "BtnStart", [BTN_MODE] = "BtnMode", 874 [BTN_THUMBL] = "BtnThumbL", [BTN_THUMBR] = "BtnThumbR", 875 [BTN_TOOL_PEN] = "ToolPen", [BTN_TOOL_RUBBER] = "ToolRubber", 876 [BTN_TOOL_BRUSH] = "ToolBrush", [BTN_TOOL_PENCIL] = "ToolPencil", 877 [BTN_TOOL_AIRBRUSH] = "ToolAirbrush", [BTN_TOOL_FINGER] = "ToolFinger", 878 [BTN_TOOL_MOUSE] = "ToolMouse", [BTN_TOOL_LENS] = "ToolLens", 879 [BTN_TOUCH] = "Touch", [BTN_STYLUS] = "Stylus", 880 [BTN_STYLUS2] = "Stylus2", [BTN_TOOL_DOUBLETAP] = "ToolDoubleTap", 881 [BTN_TOOL_TRIPLETAP] = "ToolTripleTap", [BTN_TOOL_QUADTAP] = "ToolQuadrupleTap", 882 [BTN_GEAR_DOWN] = "WheelBtn", 883 [BTN_GEAR_UP] = "Gear up", [KEY_OK] = "Ok", 884 [KEY_SELECT] = "Select", [KEY_GOTO] = "Goto", 885 [KEY_CLEAR] = "Clear", [KEY_POWER2] = "Power2", 886 [KEY_OPTION] = "Option", [KEY_INFO] = "Info", 887 [KEY_TIME] = "Time", [KEY_VENDOR] = "Vendor", 888 [KEY_ARCHIVE] = "Archive", [KEY_PROGRAM] = "Program", 889 [KEY_CHANNEL] = "Channel", [KEY_FAVORITES] = "Favorites", 890 [KEY_EPG] = "EPG", [KEY_PVR] = "PVR", 891 [KEY_MHP] = "MHP", [KEY_LANGUAGE] = "Language", 892 [KEY_TITLE] = "Title", [KEY_SUBTITLE] = "Subtitle", 893 [KEY_ANGLE] = "Angle", [KEY_ZOOM] = "Zoom", 894 [KEY_MODE] = "Mode", [KEY_KEYBOARD] = "Keyboard", 895 [KEY_SCREEN] = "Screen", [KEY_PC] = "PC", 896 [KEY_TV] = "TV", [KEY_TV2] = "TV2", 897 [KEY_VCR] = "VCR", [KEY_VCR2] = "VCR2", 898 [KEY_SAT] = "Sat", [KEY_SAT2] = "Sat2", 899 [KEY_CD] = "CD", [KEY_TAPE] = "Tape", 900 [KEY_RADIO] = "Radio", [KEY_TUNER] = "Tuner", 901 [KEY_PLAYER] = "Player", [KEY_TEXT] = "Text", 902 [KEY_DVD] = "DVD", [KEY_AUX] = "Aux", 903 [KEY_MP3] = "MP3", [KEY_AUDIO] = "Audio", 904 [KEY_VIDEO] = "Video", [KEY_DIRECTORY] = "Directory", 905 [KEY_LIST] = "List", [KEY_MEMO] = "Memo", 906 [KEY_CALENDAR] = "Calendar", [KEY_RED] = "Red", 907 [KEY_GREEN] = "Green", [KEY_YELLOW] = "Yellow", 908 [KEY_BLUE] = "Blue", [KEY_CHANNELUP] = "ChannelUp", 909 [KEY_CHANNELDOWN] = "ChannelDown", [KEY_FIRST] = "First", 910 [KEY_LAST] = "Last", [KEY_AB] = "AB", 911 [KEY_NEXT] = "Next", [KEY_RESTART] = "Restart", 912 [KEY_SLOW] = "Slow", [KEY_SHUFFLE] = "Shuffle", 913 [KEY_BREAK] = "Break", [KEY_PREVIOUS] = "Previous", 914 [KEY_DIGITS] = "Digits", [KEY_TEEN] = "TEEN", 915 [KEY_TWEN] = "TWEN", [KEY_DEL_EOL] = "DeleteEOL", 916 [KEY_DEL_EOS] = "DeleteEOS", [KEY_INS_LINE] = "InsertLine", 917 [KEY_DEL_LINE] = "DeleteLine", 918 [KEY_SEND] = "Send", [KEY_REPLY] = "Reply", 919 [KEY_FORWARDMAIL] = "ForwardMail", [KEY_SAVE] = "Save", 920 [KEY_DOCUMENTS] = "Documents", [KEY_SPELLCHECK] = "SpellCheck", 921 [KEY_LOGOFF] = "Logoff", 922 [KEY_FN] = "Fn", [KEY_FN_ESC] = "Fn+ESC", 923 [KEY_FN_1] = "Fn+1", [KEY_FN_2] = "Fn+2", 924 [KEY_FN_B] = "Fn+B", [KEY_FN_D] = "Fn+D", 925 [KEY_FN_E] = "Fn+E", [KEY_FN_F] = "Fn+F", 926 [KEY_FN_S] = "Fn+S", 927 [KEY_FN_F1] = "Fn+F1", [KEY_FN_F2] = "Fn+F2", 928 [KEY_FN_F3] = "Fn+F3", [KEY_FN_F4] = "Fn+F4", 929 [KEY_FN_F5] = "Fn+F5", [KEY_FN_F6] = "Fn+F6", 930 [KEY_FN_F7] = "Fn+F7", [KEY_FN_F8] = "Fn+F8", 931 [KEY_FN_F9] = "Fn+F9", [KEY_FN_F10] = "Fn+F10", 932 [KEY_FN_F11] = "Fn+F11", [KEY_FN_F12] = "Fn+F12", 933 [KEY_KBDILLUMTOGGLE] = "KbdIlluminationToggle", 934 [KEY_KBDILLUMDOWN] = "KbdIlluminationDown", 935 [KEY_KBDILLUMUP] = "KbdIlluminationUp", 936 [KEY_SWITCHVIDEOMODE] = "SwitchVideoMode", 937 [KEY_BUTTONCONFIG] = "ButtonConfig", 938 [KEY_TASKMANAGER] = "TaskManager", 939 [KEY_JOURNAL] = "Journal", 940 [KEY_CONTROLPANEL] = "ControlPanel", 941 [KEY_APPSELECT] = "AppSelect", 942 [KEY_SCREENSAVER] = "ScreenSaver", 943 [KEY_VOICECOMMAND] = "VoiceCommand", 944 [KEY_BRIGHTNESS_MIN] = "BrightnessMin", 945 [KEY_BRIGHTNESS_MAX] = "BrightnessMax", 946 [KEY_BRIGHTNESS_AUTO] = "BrightnessAuto", 947 [KEY_KBDINPUTASSIST_PREV] = "KbdInputAssistPrev", 948 [KEY_KBDINPUTASSIST_NEXT] = "KbdInputAssistNext", 949 [KEY_KBDINPUTASSIST_PREVGROUP] = "KbdInputAssistPrevGroup", 950 [KEY_KBDINPUTASSIST_NEXTGROUP] = "KbdInputAssistNextGroup", 951 [KEY_KBDINPUTASSIST_ACCEPT] = "KbdInputAssistAccept", 952 [KEY_KBDINPUTASSIST_CANCEL] = "KbdInputAssistCancel", 953 }; 954 955 static const char *relatives[REL_MAX + 1] = { 956 [REL_X] = "X", [REL_Y] = "Y", 957 [REL_Z] = "Z", [REL_RX] = "Rx", 958 [REL_RY] = "Ry", [REL_RZ] = "Rz", 959 [REL_HWHEEL] = "HWheel", [REL_DIAL] = "Dial", 960 [REL_WHEEL] = "Wheel", [REL_MISC] = "Misc", 961 }; 962 963 static const char *absolutes[ABS_CNT] = { 964 [ABS_X] = "X", [ABS_Y] = "Y", 965 [ABS_Z] = "Z", [ABS_RX] = "Rx", 966 [ABS_RY] = "Ry", [ABS_RZ] = "Rz", 967 [ABS_THROTTLE] = "Throttle", [ABS_RUDDER] = "Rudder", 968 [ABS_WHEEL] = "Wheel", [ABS_GAS] = "Gas", 969 [ABS_BRAKE] = "Brake", [ABS_HAT0X] = "Hat0X", 970 [ABS_HAT0Y] = "Hat0Y", [ABS_HAT1X] = "Hat1X", 971 [ABS_HAT1Y] = "Hat1Y", [ABS_HAT2X] = "Hat2X", 972 [ABS_HAT2Y] = "Hat2Y", [ABS_HAT3X] = "Hat3X", 973 [ABS_HAT3Y] = "Hat 3Y", [ABS_PRESSURE] = "Pressure", 974 [ABS_DISTANCE] = "Distance", [ABS_TILT_X] = "XTilt", 975 [ABS_TILT_Y] = "YTilt", [ABS_TOOL_WIDTH] = "ToolWidth", 976 [ABS_VOLUME] = "Volume", [ABS_MISC] = "Misc", 977 [ABS_MT_TOUCH_MAJOR] = "MTMajor", 978 [ABS_MT_TOUCH_MINOR] = "MTMinor", 979 [ABS_MT_WIDTH_MAJOR] = "MTMajorW", 980 [ABS_MT_WIDTH_MINOR] = "MTMinorW", 981 [ABS_MT_ORIENTATION] = "MTOrientation", 982 [ABS_MT_POSITION_X] = "MTPositionX", 983 [ABS_MT_POSITION_Y] = "MTPositionY", 984 [ABS_MT_TOOL_TYPE] = "MTToolType", 985 [ABS_MT_BLOB_ID] = "MTBlobID", 986 }; 987 988 static const char *misc[MSC_MAX + 1] = { 989 [MSC_SERIAL] = "Serial", [MSC_PULSELED] = "Pulseled", 990 [MSC_GESTURE] = "Gesture", [MSC_RAW] = "RawData" 991 }; 992 993 static const char *leds[LED_MAX + 1] = { 994 [LED_NUML] = "NumLock", [LED_CAPSL] = "CapsLock", 995 [LED_SCROLLL] = "ScrollLock", [LED_COMPOSE] = "Compose", 996 [LED_KANA] = "Kana", [LED_SLEEP] = "Sleep", 997 [LED_SUSPEND] = "Suspend", [LED_MUTE] = "Mute", 998 [LED_MISC] = "Misc", 999 }; 1000 1001 static const char *repeats[REP_MAX + 1] = { 1002 [REP_DELAY] = "Delay", [REP_PERIOD] = "Period" 1003 }; 1004 1005 static const char *sounds[SND_MAX + 1] = { 1006 [SND_CLICK] = "Click", [SND_BELL] = "Bell", 1007 [SND_TONE] = "Tone" 1008 }; 1009 1010 static const char **names[EV_MAX + 1] = { 1011 [EV_SYN] = syncs, [EV_KEY] = keys, 1012 [EV_REL] = relatives, [EV_ABS] = absolutes, 1013 [EV_MSC] = misc, [EV_LED] = leds, 1014 [EV_SND] = sounds, [EV_REP] = repeats, 1015 }; 1016 1017 static void hid_resolv_event(__u8 type, __u16 code, struct seq_file *f) 1018 { 1019 seq_printf(f, "%s.%s", events[type] ? events[type] : "?", 1020 names[type] ? (names[type][code] ? names[type][code] : "?") : "?"); 1021 } 1022 1023 static void hid_dump_input_mapping(struct hid_device *hid, struct seq_file *f) 1024 { 1025 int i, j, k; 1026 struct hid_report *report; 1027 struct hid_usage *usage; 1028 1029 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1030 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1031 for (i = 0; i < report->maxfield; i++) { 1032 for ( j = 0; j < report->field[i]->maxusage; j++) { 1033 usage = report->field[i]->usage + j; 1034 hid_resolv_usage(usage->hid, f); 1035 seq_printf(f, " ---> "); 1036 hid_resolv_event(usage->type, usage->code, f); 1037 seq_printf(f, "\n"); 1038 } 1039 } 1040 } 1041 } 1042 1043 } 1044 1045 static int hid_debug_rdesc_show(struct seq_file *f, void *p) 1046 { 1047 struct hid_device *hdev = f->private; 1048 const __u8 *rdesc = hdev->rdesc; 1049 unsigned rsize = hdev->rsize; 1050 int i; 1051 1052 if (!rdesc) { 1053 rdesc = hdev->dev_rdesc; 1054 rsize = hdev->dev_rsize; 1055 } 1056 1057 /* dump HID report descriptor */ 1058 for (i = 0; i < rsize; i++) 1059 seq_printf(f, "%02x ", rdesc[i]); 1060 seq_printf(f, "\n\n"); 1061 1062 /* dump parsed data and input mappings */ 1063 if (down_interruptible(&hdev->driver_input_lock)) 1064 return 0; 1065 1066 hid_dump_device(hdev, f); 1067 seq_printf(f, "\n"); 1068 hid_dump_input_mapping(hdev, f); 1069 1070 up(&hdev->driver_input_lock); 1071 1072 return 0; 1073 } 1074 1075 static int hid_debug_events_open(struct inode *inode, struct file *file) 1076 { 1077 int err = 0; 1078 struct hid_debug_list *list; 1079 unsigned long flags; 1080 1081 if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) { 1082 err = -ENOMEM; 1083 goto out; 1084 } 1085 1086 err = kfifo_alloc(&list->hid_debug_fifo, HID_DEBUG_FIFOSIZE, GFP_KERNEL); 1087 if (err) { 1088 kfree(list); 1089 goto out; 1090 } 1091 list->hdev = (struct hid_device *) inode->i_private; 1092 file->private_data = list; 1093 mutex_init(&list->read_mutex); 1094 1095 spin_lock_irqsave(&list->hdev->debug_list_lock, flags); 1096 list_add_tail(&list->node, &list->hdev->debug_list); 1097 spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); 1098 1099 out: 1100 return err; 1101 } 1102 1103 static ssize_t hid_debug_events_read(struct file *file, char __user *buffer, 1104 size_t count, loff_t *ppos) 1105 { 1106 struct hid_debug_list *list = file->private_data; 1107 int ret = 0, copied; 1108 DECLARE_WAITQUEUE(wait, current); 1109 1110 mutex_lock(&list->read_mutex); 1111 if (kfifo_is_empty(&list->hid_debug_fifo)) { 1112 add_wait_queue(&list->hdev->debug_wait, &wait); 1113 set_current_state(TASK_INTERRUPTIBLE); 1114 1115 while (kfifo_is_empty(&list->hid_debug_fifo)) { 1116 if (file->f_flags & O_NONBLOCK) { 1117 ret = -EAGAIN; 1118 break; 1119 } 1120 1121 if (signal_pending(current)) { 1122 ret = -ERESTARTSYS; 1123 break; 1124 } 1125 1126 /* if list->hdev is NULL we cannot remove_wait_queue(). 1127 * if list->hdev->debug is 0 then hid_debug_unregister() 1128 * was already called and list->hdev is being destroyed. 1129 * if we add remove_wait_queue() here we can hit a race. 1130 */ 1131 if (!list->hdev || !list->hdev->debug) { 1132 ret = -EIO; 1133 set_current_state(TASK_RUNNING); 1134 goto out; 1135 } 1136 1137 /* allow O_NONBLOCK from other threads */ 1138 mutex_unlock(&list->read_mutex); 1139 schedule(); 1140 mutex_lock(&list->read_mutex); 1141 set_current_state(TASK_INTERRUPTIBLE); 1142 } 1143 1144 __set_current_state(TASK_RUNNING); 1145 remove_wait_queue(&list->hdev->debug_wait, &wait); 1146 1147 if (ret) 1148 goto out; 1149 } 1150 1151 /* pass the fifo content to userspace, locking is not needed with only 1152 * one concurrent reader and one concurrent writer 1153 */ 1154 ret = kfifo_to_user(&list->hid_debug_fifo, buffer, count, &copied); 1155 if (ret) 1156 goto out; 1157 ret = copied; 1158 out: 1159 mutex_unlock(&list->read_mutex); 1160 return ret; 1161 } 1162 1163 static __poll_t hid_debug_events_poll(struct file *file, poll_table *wait) 1164 { 1165 struct hid_debug_list *list = file->private_data; 1166 1167 poll_wait(file, &list->hdev->debug_wait, wait); 1168 if (!kfifo_is_empty(&list->hid_debug_fifo)) 1169 return EPOLLIN | EPOLLRDNORM; 1170 if (!list->hdev->debug) 1171 return EPOLLERR | EPOLLHUP; 1172 return 0; 1173 } 1174 1175 static int hid_debug_events_release(struct inode *inode, struct file *file) 1176 { 1177 struct hid_debug_list *list = file->private_data; 1178 unsigned long flags; 1179 1180 spin_lock_irqsave(&list->hdev->debug_list_lock, flags); 1181 list_del(&list->node); 1182 spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); 1183 kfifo_free(&list->hid_debug_fifo); 1184 kfree(list); 1185 1186 return 0; 1187 } 1188 1189 DEFINE_SHOW_ATTRIBUTE(hid_debug_rdesc); 1190 1191 static const struct file_operations hid_debug_events_fops = { 1192 .owner = THIS_MODULE, 1193 .open = hid_debug_events_open, 1194 .read = hid_debug_events_read, 1195 .poll = hid_debug_events_poll, 1196 .release = hid_debug_events_release, 1197 .llseek = noop_llseek, 1198 }; 1199 1200 1201 void hid_debug_register(struct hid_device *hdev, const char *name) 1202 { 1203 hdev->debug_dir = debugfs_create_dir(name, hid_debug_root); 1204 hdev->debug_rdesc = debugfs_create_file("rdesc", 0400, 1205 hdev->debug_dir, hdev, &hid_debug_rdesc_fops); 1206 hdev->debug_events = debugfs_create_file("events", 0400, 1207 hdev->debug_dir, hdev, &hid_debug_events_fops); 1208 hdev->debug = 1; 1209 } 1210 1211 void hid_debug_unregister(struct hid_device *hdev) 1212 { 1213 hdev->debug = 0; 1214 wake_up_interruptible(&hdev->debug_wait); 1215 debugfs_remove(hdev->debug_rdesc); 1216 debugfs_remove(hdev->debug_events); 1217 debugfs_remove(hdev->debug_dir); 1218 } 1219 1220 void hid_debug_init(void) 1221 { 1222 hid_debug_root = debugfs_create_dir("hid", NULL); 1223 } 1224 1225 void hid_debug_exit(void) 1226 { 1227 debugfs_remove_recursive(hid_debug_root); 1228 } 1229