drivers/hid/hid-debug.c

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