Root/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
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
914
915static int hid_debug_rdesc_show(struct seq_file *f, void *p)
916{
917    struct hid_device *hdev = f->private;
918    int i;
919
920    /* dump HID report descriptor */
921    for (i = 0; i < hdev->rsize; i++)
922        seq_printf(f, "%02x ", hdev->rdesc[i]);
923    seq_printf(f, "\n\n");
924
925    /* dump parsed data and input mappings */
926    hid_dump_device(hdev, f);
927    seq_printf(f, "\n");
928    hid_dump_input_mapping(hdev, f);
929
930    return 0;
931}
932
933static int hid_debug_rdesc_open(struct inode *inode, struct file *file)
934{
935    return single_open(file, hid_debug_rdesc_show, inode->i_private);
936}
937
938static int hid_debug_events_open(struct inode *inode, struct file *file)
939{
940    int err = 0;
941    struct hid_debug_list *list;
942
943    if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) {
944        err = -ENOMEM;
945        goto out;
946    }
947
948    if (!(list->hid_debug_buf = kzalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_KERNEL))) {
949        err = -ENOMEM;
950        kfree(list);
951        goto out;
952    }
953    list->hdev = (struct hid_device *) inode->i_private;
954    file->private_data = list;
955    mutex_init(&list->read_mutex);
956
957    list_add_tail(&list->node, &list->hdev->debug_list);
958
959out:
960    return err;
961}
962
963static ssize_t hid_debug_events_read(struct file *file, char __user *buffer,
964        size_t count, loff_t *ppos)
965{
966    struct hid_debug_list *list = file->private_data;
967    int ret = 0, len;
968    DECLARE_WAITQUEUE(wait, current);
969
970    mutex_lock(&list->read_mutex);
971    while (ret == 0) {
972        if (list->head == list->tail) {
973            add_wait_queue(&list->hdev->debug_wait, &wait);
974            set_current_state(TASK_INTERRUPTIBLE);
975
976            while (list->head == list->tail) {
977                if (file->f_flags & O_NONBLOCK) {
978                    ret = -EAGAIN;
979                    break;
980                }
981                if (signal_pending(current)) {
982                    ret = -ERESTARTSYS;
983                    break;
984                }
985
986                if (!list->hdev || !list->hdev->debug) {
987                    ret = -EIO;
988                    break;
989                }
990
991                /* allow O_NONBLOCK from other threads */
992                mutex_unlock(&list->read_mutex);
993                schedule();
994                mutex_lock(&list->read_mutex);
995                set_current_state(TASK_INTERRUPTIBLE);
996            }
997
998            set_current_state(TASK_RUNNING);
999            remove_wait_queue(&list->hdev->debug_wait, &wait);
1000        }
1001
1002        if (ret)
1003            goto out;
1004
1005        /* pass the ringbuffer contents to userspace */
1006copy_rest:
1007        if (list->tail == list->head)
1008            goto out;
1009        if (list->tail > list->head) {
1010            len = list->tail - list->head;
1011
1012            if (copy_to_user(buffer + ret, &list->hid_debug_buf[list->head], len)) {
1013                ret = -EFAULT;
1014                goto out;
1015            }
1016            ret += len;
1017            list->head += len;
1018        } else {
1019            len = HID_DEBUG_BUFSIZE - list->head;
1020
1021            if (copy_to_user(buffer, &list->hid_debug_buf[list->head], len)) {
1022                ret = -EFAULT;
1023                goto out;
1024            }
1025            list->head = 0;
1026            ret += len;
1027            goto copy_rest;
1028        }
1029
1030    }
1031out:
1032    mutex_unlock(&list->read_mutex);
1033    return ret;
1034}
1035
1036static unsigned int hid_debug_events_poll(struct file *file, poll_table *wait)
1037{
1038    struct hid_debug_list *list = file->private_data;
1039
1040    poll_wait(file, &list->hdev->debug_wait, wait);
1041    if (list->head != list->tail)
1042        return POLLIN | POLLRDNORM;
1043    if (!list->hdev->debug)
1044        return POLLERR | POLLHUP;
1045    return 0;
1046}
1047
1048static int hid_debug_events_release(struct inode *inode, struct file *file)
1049{
1050    struct hid_debug_list *list = file->private_data;
1051
1052    list_del(&list->node);
1053    kfree(list->hid_debug_buf);
1054    kfree(list);
1055
1056    return 0;
1057}
1058
1059static const struct file_operations hid_debug_rdesc_fops = {
1060    .open = hid_debug_rdesc_open,
1061    .read = seq_read,
1062    .llseek = seq_lseek,
1063    .release = single_release,
1064};
1065
1066static const struct file_operations hid_debug_events_fops = {
1067    .owner = THIS_MODULE,
1068    .open = hid_debug_events_open,
1069    .read = hid_debug_events_read,
1070    .poll = hid_debug_events_poll,
1071    .release = hid_debug_events_release,
1072    .llseek = noop_llseek,
1073};
1074
1075
1076void hid_debug_register(struct hid_device *hdev, const char *name)
1077{
1078    hdev->debug_dir = debugfs_create_dir(name, hid_debug_root);
1079    hdev->debug_rdesc = debugfs_create_file("rdesc", 0400,
1080            hdev->debug_dir, hdev, &hid_debug_rdesc_fops);
1081    hdev->debug_events = debugfs_create_file("events", 0400,
1082            hdev->debug_dir, hdev, &hid_debug_events_fops);
1083    hdev->debug = 1;
1084}
1085
1086void hid_debug_unregister(struct hid_device *hdev)
1087{
1088    hdev->debug = 0;
1089    wake_up_interruptible(&hdev->debug_wait);
1090    debugfs_remove(hdev->debug_rdesc);
1091    debugfs_remove(hdev->debug_events);
1092    debugfs_remove(hdev->debug_dir);
1093}
1094
1095void hid_debug_init(void)
1096{
1097    hid_debug_root = debugfs_create_dir("hid", NULL);
1098}
1099
1100void hid_debug_exit(void)
1101{
1102    debugfs_remove_recursive(hid_debug_root);
1103}
1104
1105

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