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