summaryrefslogtreecommitdiff
path: root/hw/xfree86/common/xf86Xinput.c
blob: e39c087e2dd0259fec3b1aa619b0c1e584236fd6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
/*
 * Copyright 1995-1999 by Frederic Lepied, France. <Lepied@XFree86.org>
 *                                                                            
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is  hereby granted without fee, provided that
 * the  above copyright   notice appear  in   all  copies and  that both  that
 * copyright  notice   and   this  permission   notice  appear  in  supporting
 * documentation, and that   the  name of  Frederic   Lepied not  be  used  in
 * advertising or publicity pertaining to distribution of the software without
 * specific,  written      prior  permission.     Frederic  Lepied   makes  no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.                   
 *                                                                            
 * FREDERIC  LEPIED DISCLAIMS ALL   WARRANTIES WITH REGARD  TO  THIS SOFTWARE,
 * INCLUDING ALL IMPLIED   WARRANTIES OF MERCHANTABILITY  AND   FITNESS, IN NO
 * EVENT  SHALL FREDERIC  LEPIED BE   LIABLE   FOR ANY  SPECIAL, INDIRECT   OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA  OR PROFITS, WHETHER  IN  AN ACTION OF  CONTRACT,  NEGLIGENCE OR OTHER
 * TORTIOUS  ACTION, ARISING    OUT OF OR   IN  CONNECTION  WITH THE USE    OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 */
/*
 * Copyright (c) 2000-2002 by The XFree86 Project, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of the copyright holder(s)
 * and author(s) shall not be used in advertising or otherwise to promote
 * the sale, use or other dealings in this Software without prior written
 * authorization from the copyright holder(s) and author(s).
 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include <X11/Xfuncproto.h>
#include <X11/Xmd.h>
#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86Xinput.h"
#include "XIstubs.h"
#include "xf86Optrec.h"
#include "mipointer.h"
#include "xf86InPriv.h"
#include "compiler.h"
#include "extinit.h"

#ifdef DPMSExtension
#define DPMS_SERVER
#include <X11/extensions/dpms.h>
#include "dpmsproc.h"
#endif

#include "exevents.h"	/* AddInputDevice */
#include "exglobals.h"

#define EXTENSION_PROC_ARGS void *
#include "extnsionst.h"

#include "windowstr.h"	/* screenIsSaved */

#include <stdarg.h>

#include <X11/Xpoll.h>

#include "mi.h"

#include <ptrveloc.h>          /* dix pointer acceleration */

#ifdef XFreeXDGA
#include "dgaproc.h"
#endif

#ifdef XKB
#include "xkbsrv.h"
#endif

#include "os.h"

EventListPtr xf86Events = NULL;

/**
 * Eval config and modify DeviceVelocityRec accordingly
 */
static void
ProcessVelocityConfiguration(char* devname, pointer list, DeviceVelocityPtr s){
    int tempi, i;
    float tempf, tempf2;

    if(!s)
        return;

    tempf = xf86SetRealOption(list, "FilterHalflife", -1);
    if(tempf > 0)
        tempf = 1.0 / tempf;   /* set reciprocal if possible */

    tempf2 = xf86SetRealOption(list, "FilterChainProgression", 2.0);
    xf86Msg(X_CONFIG, "%s: (accel) filter chain progression: %.2f\n",
            devname, tempf2);
    if(tempf2 < 1)
        tempf2 = 2;

    tempi = xf86SetIntOption(list, "FilterChainLength", 1);
    if(tempi < 1 || tempi > MAX_VELOCITY_FILTERS)
	tempi = 1;

    if(tempf > 0.0f && tempi >= 1 && tempf2 >= 1.0f)
	InitFilterChain(s, tempf, tempf2, tempi, 40);

    /* dump filter setup to log */
    for(i = 0; i < MAX_VELOCITY_FILTERS; i++){
	if(s->filters[i].rdecay <= 0)
	    break;

        xf86Msg(X_CONFIG, "%s: (accel) filter stage %i: %.2f ms\n",
                devname, i, 1.0f / (s->filters[i].rdecay));
    }

    tempf = xf86SetRealOption(list, "ConstantDeceleration", 1.0);
    if(tempf > 1.0){
        xf86Msg(X_CONFIG, "%s: (accel) constant deceleration by %.1f\n",
                devname, tempf);
        s->const_acceleration = 1.0 / tempf;   /* set reciprocal deceleration
                                                  alias acceleration */
    }

    tempf = xf86SetRealOption(list, "AdaptiveDeceleration", 1.0);
    if(tempf > 1.0){
        xf86Msg(X_CONFIG, "%s: (accel) adaptive deceleration by %.1f\n",
                devname, tempf);
        s->min_acceleration = 1.0 / tempf;   /* set minimum acceleration */
    }

    tempf = xf86SetRealOption(list, "VelocityCoupling", -1);
    if(tempf >= 0){
	xf86Msg(X_CONFIG, "%s: (accel) velocity coupling is %.1f%%\n", devname,
                tempf*100.0);
	s->coupling = tempf;
    }

    /*  Configure softening. If const deceleration is used, this is expected
     *  to provide better subpixel information so we enable
     *  softening by default only if ConstantDeceleration is not used
     */
    s->use_softening = xf86SetBoolOption(list, "Softening",
                                         s->const_acceleration == 1.0);

    s->average_accel = xf86SetBoolOption(list, "AccelerationProfileAveraging",
                                         s->average_accel);

    s->reset_time = xf86SetIntOption(list, "VelocityReset", s->reset_time);

    tempf = xf86SetRealOption(list, "ExpectedRate", 0);
    if(tempf > 0){
        s->corr_mul = 1000.0 / tempf;
    }else{
        s->corr_mul = xf86SetRealOption(list, "VelocityScale", s->corr_mul);
    }

    /* select profile by number */
    tempi= xf86SetIntOption(list, "AccelerationProfile",
                            s->statistics.profile_number);

    if(SetAccelerationProfile(s, tempi)){
        xf86Msg(X_CONFIG, "%s: (accel) set acceleration profile %i\n", devname, tempi);
    }else{
        xf86Msg(X_CONFIG, "%s: (accel) acceleration profile %i is unknown\n",
                devname, tempi);
    }
}

static void
ApplyAccelerationSettings(DeviceIntPtr dev){
    int scheme;
    DeviceVelocityPtr pVel;
    LocalDevicePtr local = (LocalDevicePtr)dev->public.devicePrivate;
    char* schemeStr;

    if(dev->valuator){
	schemeStr = xf86SetStrOption(local->options, "AccelerationScheme", "");

	scheme = dev->valuator->accelScheme.number;

	if(!xf86NameCmp(schemeStr, "predictable"))
	    scheme = PtrAccelPredictable;

	if(!xf86NameCmp(schemeStr, "lightweight"))
	    scheme = PtrAccelLightweight;

	if(!xf86NameCmp(schemeStr, "none"))
	    scheme = PtrAccelNoOp;

        /* reinit scheme if needed */
        if(dev->valuator->accelScheme.number != scheme){
            if(dev->valuator->accelScheme.AccelCleanupProc){
                dev->valuator->accelScheme.AccelCleanupProc(dev);
            }

            if(InitPointerAccelerationScheme(dev, scheme)){
		xf86Msg(X_CONFIG, "%s: (accel) selected scheme %s/%i\n",
		        local->name, schemeStr, scheme);
	    }else{
        	xf86Msg(X_CONFIG, "%s: (accel) could not init scheme %s\n",
        	        local->name, schemeStr);
        	scheme = dev->valuator->accelScheme.number;
            }
        }else{
            xf86Msg(X_CONFIG, "%s: (accel) keeping acceleration scheme %i\n",
                    local->name, scheme);
        }

        xfree(schemeStr);

        /* process special configuration */
        switch(scheme){
            case PtrAccelPredictable:
                pVel = GetDevicePredictableAccelData(dev);
                ProcessVelocityConfiguration (local->name, local->options,
                                              pVel);
                break;
        }
    }
}

static Bool
xf86SendDragEvents(DeviceIntPtr	device)
{
    LocalDevicePtr local = (LocalDevicePtr) device->public.devicePrivate;
    
    if (device->button && device->button->buttonsDown > 0)
        return (local->flags & XI86_SEND_DRAG_EVENTS);
    else
        return (TRUE);
}

/***********************************************************************
 *
 * xf86ProcessCommonOptions --
 * 
 *	Process global options.
 *
 ***********************************************************************
 */
void
xf86ProcessCommonOptions(LocalDevicePtr local,
                         pointer	list)
{
    if (!xf86SetBoolOption(list, "AlwaysCore", 1) ||
        !xf86SetBoolOption(list, "SendCoreEvents", 1) ||
        !xf86SetBoolOption(list, "CorePointer", 1) ||
        !xf86SetBoolOption(list, "CoreKeyboard", 1)) {
        xf86Msg(X_CONFIG, "%s: doesn't report core events\n", local->name);
    } else {
        local->flags |= XI86_ALWAYS_CORE;
        xf86Msg(X_CONFIG, "%s: always reports core events\n", local->name);
    }

    if (xf86SetBoolOption(list, "SendDragEvents", 1)) {
        local->flags |= XI86_SEND_DRAG_EVENTS;
    } else {
        xf86Msg(X_CONFIG, "%s: doesn't report drag events\n", local->name);
    }

    /* Backwards compatibility. */
    local->history_size = GetMotionHistorySize();
    /* Preallocate xEvent store */
    if (!xf86Events)
        GetEventList(&xf86Events);
    if (!xf86Events)
        FatalError("Couldn't allocate event store\n");
}

/***********************************************************************
 *
 * xf86ActivateDevice --
 *
 *	Initialize an input device.
 *
 * Returns TRUE on success, or FALSE otherwise.
 ***********************************************************************
 */
int
xf86ActivateDevice(LocalDevicePtr local)
{
    DeviceIntPtr	dev;

    if (local->flags & XI86_CONFIGURED) {
        dev = AddInputDevice(serverClient, local->device_control, TRUE);

        if (dev == NULL)
        {
            xf86Msg(X_ERROR, "Too many input devices. Ignoring %s\n",
                    local->name);
            local->dev = NULL;
            return FALSE;
        }

        local->atom = MakeAtom(local->type_name,
                               strlen(local->type_name),
                               TRUE);
        AssignTypeAndName(dev, local->atom, local->name);
        dev->public.devicePrivate = (pointer) local;
        local->dev = dev;      
        
        dev->coreEvents = local->flags & XI86_ALWAYS_CORE; 
        dev->isMaster = FALSE;
        dev->spriteInfo->spriteOwner = FALSE;

        if (DeviceIsPointerType(dev))
        {
            dev->deviceGrab.ActivateGrab = ActivatePointerGrab;
            dev->deviceGrab.DeactivateGrab = DeactivatePointerGrab;
        } else 
        {
            dev->deviceGrab.ActivateGrab = ActivateKeyboardGrab;
            dev->deviceGrab.DeactivateGrab = DeactivateKeyboardGrab;
        }

        RegisterOtherDevice(dev);
#ifdef XKB
        if (!noXkbExtension)
            XkbSetExtension(dev, ProcessKeyboardEvent);
#endif

        if (serverGeneration == 1) 
            xf86Msg(X_INFO, "XINPUT: Adding extended input device \"%s\" (type: %s)\n",
                    local->name, local->type_name);
    }

    return TRUE;
}


/***********************************************************************
 *
 * Caller:	ProcXOpenDevice
 *
 * This is the implementation-dependent routine to open an input device.
 * Some implementations open all input devices when the server is first
 * initialized, and never close them.  Other implementations open only
 * the X pointer and keyboard devices during server initialization,
 * and only open other input devices when some client makes an
 * XOpenDevice request.  This entry point is for the latter type of 
 * implementation.
 *
 * If the physical device is not already open, do it here.  In this case,
 * you need to keep track of the fact that one or more clients has the
 * device open, and physically close it when the last client that has
 * it open does an XCloseDevice.
 *
 * The default implementation is to do nothing (assume all input devices
 * are opened during X server initialization and kept open).
 *
 ***********************************************************************
 */

void
OpenInputDevice(DeviceIntPtr	dev,
                ClientPtr	client,
                int		*status)
{
    if (!dev->inited)
        ActivateDevice(dev);

    *status = Success;
}

void
CloseInputDevice(DeviceIntPtr dev,
                 ClientPtr client)
{
}

/****************************************************************************
 *
 * Caller:	ProcXSetDeviceMode
 *
 * Change the mode of an extension device.
 * This function is used to change the mode of a device from reporting
 * relative motion to reporting absolute positional information, and
 * vice versa.
 * The default implementation below is that no such devices are supported.
 *
 ***********************************************************************
 */

int
SetDeviceMode (ClientPtr client, DeviceIntPtr dev, int mode)
{
  LocalDevicePtr        local = (LocalDevicePtr)dev->public.devicePrivate;

  if (local->switch_mode) {
    return (*local->switch_mode)(client, dev, mode);
  }
  else
    return BadMatch;
}


/***********************************************************************
 *
 * Caller:	ProcXSetDeviceValuators
 *
 * Set the value of valuators on an extension input device.
 * This function is used to set the initial value of valuators on
 * those input devices that are capable of reporting either relative
 * motion or an absolute position, and allow an initial position to be set.
 * The default implementation below is that no such devices are supported.
 *
 ***********************************************************************
 */

int
SetDeviceValuators (ClientPtr client, DeviceIntPtr dev, int *valuators,
                    int first_valuator, int num_valuators)
{
    LocalDevicePtr local = (LocalDevicePtr) dev->public.devicePrivate;

    if (local->set_device_valuators)
	return (*local->set_device_valuators)(local, valuators, first_valuator,
					      num_valuators);

    return BadMatch;
}


/***********************************************************************
 *
 * Caller:	ProcXChangeDeviceControl
 *
 * Change the specified device controls on an extension input device.
 *
 ***********************************************************************
 */

int
ChangeDeviceControl (ClientPtr client, DeviceIntPtr dev, xDeviceCtl *control)
{
  LocalDevicePtr        local = (LocalDevicePtr)dev->public.devicePrivate;

  if (!local->control_proc) {
      switch (control->control) {
      case DEVICE_CORE:
          return BadMatch;
      case DEVICE_RESOLUTION:
      case DEVICE_ABS_CALIB:
      case DEVICE_ABS_AREA:
      case DEVICE_ENABLE:
        return Success;
      default:
        return BadMatch;
      }
  }
  else {
      return (*local->control_proc)(local, control);
  }
}

void
AddOtherInputDevices()
{
}

/**
 * Create a new input device, activate and enable it.
 *
 * Possible return codes:
 *    BadName .. a bad driver name was supplied.
 *    BadImplementation ... The driver does not have a PreInit function. This
 *                          is a driver bug.
 *    BadMatch .. device initialization failed.
 *    BadAlloc .. too many input devices
 *
 * @param idev The device, already set up with identifier, driver, and the
 * options.
 * @param pdev Pointer to the new device, if Success was reported.
 * @param enable Enable the device after activating it.
 *
 * @return Success or an error code
 */
_X_INTERNAL int
xf86NewInputDevice(IDevPtr idev, DeviceIntPtr *pdev, BOOL enable)
{
    InputDriverPtr drv = NULL;
    InputInfoPtr pInfo = NULL;
    DeviceIntPtr dev = NULL;
    int rval;

    /* Memory leak for every attached device if we don't
     * test if the module is already loaded first */
    drv = xf86LookupInputDriver(idev->driver);
    if (!drv)
        if (xf86LoadOneModule(idev->driver, NULL))
            drv = xf86LookupInputDriver(idev->driver);
    if (!drv) {
        xf86Msg(X_ERROR, "No input driver matching `%s'\n", idev->driver);
        rval = BadName;
        goto unwind;
    }

    if (!drv->PreInit) {
        xf86Msg(X_ERROR,
                "Input driver `%s' has no PreInit function (ignoring)\n",
                drv->driverName);
        rval = BadImplementation;
        goto unwind;
    }

    pInfo = drv->PreInit(drv, idev, 0);

    if (!pInfo) {
        xf86Msg(X_ERROR, "PreInit returned NULL for \"%s\"\n", idev->identifier);
        rval = BadMatch;
        goto unwind;
    }
    else if (!(pInfo->flags & XI86_CONFIGURED)) {
        xf86Msg(X_ERROR, "PreInit failed for input device \"%s\"\n",
                idev->identifier);
        rval = BadMatch;
        goto unwind;
    }

    if (!xf86ActivateDevice(pInfo))
    {
        rval = BadAlloc;
        goto unwind;
    }

    dev = pInfo->dev;
    ActivateDevice(dev);
    /* Enable it if it's properly initialised and we're currently in the VT */
    if (enable && dev->inited && dev->startup && xf86Screens[0]->vtSema)
    {
        EnableDevice(dev);
        /* send enter/leave event, update sprite window */
        CheckMotion(NULL, dev);
    }

    *pdev = dev;
    return Success;

unwind:
    if(pInfo) {
        if(drv->UnInit)
            drv->UnInit(drv, pInfo, 0);
        else
            xf86DeleteInput(pInfo, 0);
    }
    return rval;
}

int
NewInputDeviceRequest (InputOption *options, DeviceIntPtr *pdev)
{
    IDevRec *idev = NULL;
    InputOption *option = NULL;
    int rval = Success;
    int is_auto = 0;

    idev = xcalloc(sizeof(*idev), 1);
    if (!idev)
        return BadAlloc;

    for (option = options; option; option = option->next) {
        if (strcasecmp(option->key, "driver") == 0) {
            if (idev->driver) {
                rval = BadRequest;
                goto unwind;
            }
            idev->driver = xstrdup(option->value);
            if (!idev->driver) {
                rval = BadAlloc;
                goto unwind;
            }
        }

        if (strcasecmp(option->key, "name") == 0 ||
            strcasecmp(option->key, "identifier") == 0) {
            if (idev->identifier) {
                rval = BadRequest;
                goto unwind;
            }
            idev->identifier = xstrdup(option->value);
            if (!idev->identifier) {
                rval = BadAlloc;
                goto unwind;
            }
        }

        /* Right now, the only automatic config we know of is HAL. */
        if (strcmp(option->key, "_source") == 0 &&
            strcmp(option->value, "server/hal") == 0) {
            if (!xf86Info.autoAddDevices) {
                rval = BadMatch;
                goto unwind;
            }

            is_auto = 1;
        }
    }
    if (!idev->driver || !idev->identifier) {
        xf86Msg(X_ERROR, "No input driver/identifier specified (ignoring)\n");
        rval = BadRequest;
        goto unwind;
    }

    if (!idev->identifier) {
        xf86Msg(X_ERROR, "No device identifier specified (ignoring)\n");
        return BadMatch;
    }

    for (option = options; option; option = option->next) {
        /* Steal option key/value strings from the provided list.
         * We need those strings, the InputOption list doesn't. */
        idev->commonOptions = xf86addNewOption(idev->commonOptions,
                                               option->key, option->value);
        option->key = NULL;
        option->value = NULL;
    }

    rval = xf86NewInputDevice(idev, pdev,
                (!is_auto || (is_auto && xf86Info.autoEnableDevices)));
    if (rval == Success)
        return Success;

unwind:
    if(idev->driver)
        xfree(idev->driver);
    if(idev->identifier)
        xfree(idev->identifier);
    xf86optionListFree(idev->commonOptions);
    xfree(idev);
    return rval;
}

void
DeleteInputDeviceRequest(DeviceIntPtr pDev)
{
    LocalDevicePtr pInfo = (LocalDevicePtr) pDev->public.devicePrivate;
    InputDriverPtr drv = NULL;
    IDevRec *idev = NULL;
    IDevPtr *it;
    Bool isMaster = pDev->isMaster;

    if (pInfo) /* need to get these before RemoveDevice */
    {
        drv = pInfo->drv;
        idev = pInfo->conf_idev;
    }

    OsBlockSignals();
    RemoveDevice(pDev);

    if (!isMaster)
    {
        if(drv->UnInit)
            drv->UnInit(drv, pInfo, 0);
        else
            xf86DeleteInput(pInfo, 0);

        /* devices added through HAL aren't in the config layout */
        it = xf86ConfigLayout.inputs;
        while(*it && *it != idev)
            it++;

        if (!(*it)) /* end of list, not in the layout */
        {
            xfree(idev->driver);
            xfree(idev->identifier);
            xf86optionListFree(idev->commonOptions);
            xfree(idev);
        }
    }
    OsReleaseSignals();
}

/* 
 * convenient functions to post events
 */

void
xf86PostMotionEvent(DeviceIntPtr	device,
                    int			is_absolute,
                    int			first_valuator,
                    int			num_valuators,
                    ...)
{
    va_list var;
    int i = 0;
    static int valuators[MAX_VALUATORS];

    if (num_valuators > MAX_VALUATORS) {
	xf86Msg(X_ERROR, "%s: num_valuator %d is greater than"
	    " MAX_VALUATORS\n", __FUNCTION__, num_valuators);
	return;
    }

    va_start(var, num_valuators);
    for (i = 0; i < num_valuators; i++)
        valuators[i] = va_arg(var, int);
    va_end(var);

    xf86PostMotionEventP(device, is_absolute, first_valuator, num_valuators, valuators);
}

void
xf86PostMotionEventP(DeviceIntPtr	device,
                    int			is_absolute,
                    int			first_valuator,
                    int			num_valuators,
                    int			*valuators)
{
    int i = 0, nevents = 0;
    int dx = 0, dy = 0;
    Bool drag = xf86SendDragEvents(device);
    xEvent *xE = NULL;
    int index;
    int flags = 0;

    if (num_valuators > MAX_VALUATORS) {
	xf86Msg(X_ERROR, "%s: num_valuator %d is greater than"
	    " MAX_VALUATORS\n", __FUNCTION__, num_valuators);
	return;
    }

    if (is_absolute)
        flags = POINTER_ABSOLUTE;
    else
        flags = POINTER_RELATIVE | POINTER_ACCELERATE;

#if XFreeXDGA
    /* The evdev driver may not always send all axes across. */
    if (num_valuators >= 1 && first_valuator <= 1) {
        if (miPointerGetScreen(device)) {
            index = miPointerGetScreen(device)->myNum;
            if (first_valuator == 0)
            {
                dx = valuators[0];
                if (is_absolute)
                    dx -= device->last.valuators[0];
            }

            if (first_valuator == 1 || num_valuators >= 2)
            {
                dy = valuators[1 - first_valuator];
                if (is_absolute)
                    dy -= device->last.valuators[1];
            }

            if (DGAStealMotionEvent(device, index, dx, dy))
                return;
        }
    }
#endif

    GetEventList(&xf86Events);
    nevents = GetPointerEvents(xf86Events, device, MotionNotify, 0,
                               flags, first_valuator, num_valuators,
                               valuators);

    for (i = 0; i < nevents; i++) {
        xE = (xf86Events + i)->event;
        /* Don't post core motion events for devices not registered to send
         * drag events. */
        if (xE->u.u.type != MotionNotify || drag) {
            mieqEnqueue(device, (xf86Events + i)->event);
        }
    }
}

void
xf86PostProximityEvent(DeviceIntPtr	device,
                       int		is_in,
                       int		first_valuator,
                       int		num_valuators,
                       ...)
{
    va_list var;
    int i, nevents;
    int valuators[MAX_VALUATORS];


    if (num_valuators > MAX_VALUATORS) {
	xf86Msg(X_ERROR, "%s: num_valuator %d is greater than"
	    " MAX_VALUATORS\n", __FUNCTION__, num_valuators);
	return;
    }

    va_start(var, num_valuators);
    for (i = 0; i < num_valuators; i++)
        valuators[i] = va_arg(var, int);
    va_end(var);

    GetEventList(&xf86Events);
    nevents = GetProximityEvents(xf86Events, device,
                                 is_in ? ProximityIn : ProximityOut, 
                                 first_valuator, num_valuators, valuators);
    for (i = 0; i < nevents; i++)
        mieqEnqueue(device, (xf86Events + i)->event);

}

void
xf86PostButtonEvent(DeviceIntPtr	device,
                    int			is_absolute,
                    int			button,
                    int			is_down,
                    int			first_valuator,
                    int			num_valuators,
                    ...)
{
    va_list var;
    int valuators[MAX_VALUATORS];
    int i = 0, nevents = 0;
    int index;

#if XFreeXDGA
    if (miPointerGetScreen(device)) {
        index = miPointerGetScreen(device)->myNum;
        if (DGAStealButtonEvent(device, index, button, is_down))
            return;
    }
#endif
    if (num_valuators > MAX_VALUATORS) {
	xf86Msg(X_ERROR, "%s: num_valuator %d is greater than"
	    " MAX_VALUATORS\n", __FUNCTION__, num_valuators);
	return;
    }

    va_start(var, num_valuators);
    for (i = 0; i < num_valuators; i++)
        valuators[i] = va_arg(var, int);
    va_end(var);

    GetEventList(&xf86Events);
    nevents = GetPointerEvents(xf86Events, device,
                               is_down ? ButtonPress : ButtonRelease, button,
                               (is_absolute) ? POINTER_ABSOLUTE : POINTER_RELATIVE,
                               first_valuator, num_valuators, valuators);

    for (i = 0; i < nevents; i++)
        mieqEnqueue(device, (xf86Events + i)->event);

}

void
xf86PostKeyEvent(DeviceIntPtr	device,
                 unsigned int	key_code,
                 int		is_down,
                 int		is_absolute,
                 int		first_valuator,
                 int		num_valuators,
                 ...)
{
    va_list var;
    int i = 0, nevents = 0;
    static int valuators[MAX_VALUATORS];

    /* instil confidence in the user */
    DebugF("this function has never been tested properly.  if things go quite "
           "badly south after this message, then xf86PostKeyEvent is "
           "broken.\n");

    if (num_valuators > MAX_VALUATORS) {
	xf86Msg(X_ERROR, "%s: num_valuator %d is greater than"
	    " MAX_VALUATORS\n", __FUNCTION__, num_valuators);
	return;
    }

    if (is_absolute) {
        va_start(var, num_valuators);
        for (i = 0; i < num_valuators; i++)
            valuators[i] = va_arg(var, int);
        va_end(var);

        GetEventList(&xf86Events);
        nevents = GetKeyboardValuatorEvents(xf86Events, device,
                                            is_down ? KeyPress : KeyRelease,
                                            key_code, first_valuator,
                                            num_valuators, valuators);
    }
    else {
        nevents = GetKeyboardEvents(xf86Events, device,
                                    is_down ? KeyPress : KeyRelease,
                                    key_code);
    }

    for (i = 0; i < nevents; i++)
        mieqEnqueue(device, (xf86Events + i)->event);
}

void
xf86PostKeyboardEvent(DeviceIntPtr      device,
                      unsigned int      key_code,
                      int               is_down)
{
    int nevents = 0, i = 0;
    int index;

#if XFreeXDGA
    DeviceIntPtr pointer;

    /* Some pointers send key events, paired device is wrong then. */
    pointer = IsPointerDevice(device) ? device : GetPairedDevice(device);

    if (miPointerGetScreen(pointer)) {
        index = miPointerGetScreen(pointer)->myNum;
        if (DGAStealKeyEvent(device, index, key_code, is_down))
            return;
    }
#endif

    GetEventList(&xf86Events);
    nevents = GetKeyboardEvents(xf86Events, device,
                                is_down ? KeyPress : KeyRelease, key_code);

    for (i = 0; i < nevents; i++)
        mieqEnqueue(device, (xf86Events + i)->event);
}

LocalDevicePtr
xf86FirstLocalDevice()
{
    return xf86InputDevs;
}

/* 
 * Cx     - raw data from touch screen
 * Sxhigh - scaled highest dimension
 *          (remember, this is of rows - 1 because of 0 origin)
 * Sxlow  - scaled lowest dimension
 * Rxhigh - highest raw value from touch screen calibration
 * Rxlow  - lowest raw value from touch screen calibration
 *
 * This function is the same for X or Y coordinates.
 * You may have to reverse the high and low values to compensate for
 * different orgins on the touch screen vs X.
 */

int
xf86ScaleAxis(int	Cx,
              int	Sxhigh,
              int	Sxlow,
              int	Rxhigh,
              int	Rxlow )
{
    int X;
    int dSx = Sxhigh - Sxlow;
    int dRx = Rxhigh - Rxlow;

    dSx = Sxhigh - Sxlow;
    if (dRx) {
	X = ((dSx * (Cx - Rxlow)) / dRx) + Sxlow;
    }
    else {
	X = 0;
	ErrorF ("Divide by Zero in xf86ScaleAxis");
    }
    
    if (X > Sxhigh)
	X = Sxhigh;
    if (X < Sxlow)
	X = Sxlow;
    
    return (X);
}

/*
 * This function checks the given screen against the current screen and
 * makes changes if appropriate. It should be called from an XInput driver's
 * ReadInput function before any events are posted, if the device is screen
 * specific like a touch screen.
 */
void
xf86XInputSetScreen(LocalDevicePtr	local,
		    int			screen_number,
		    int			x,
		    int			y)
{
    if (miPointerGetScreen(local->dev) !=
          screenInfo.screens[screen_number]) {
	miPointerSetScreen(local->dev, screen_number, x, y);
    }
}


void
xf86InitValuatorAxisStruct(DeviceIntPtr dev, int axnum, int minval, int maxval,
			   int resolution, int min_res, int max_res)
{
    if (!dev || !dev->valuator)
        return;

    InitValuatorAxisStruct(dev, axnum, minval, maxval, resolution, min_res,
			   max_res);
}

/*
 * Set the valuator values to be in synch with dix/event.c
 * DefineInitialRootWindow().
 */
void
xf86InitValuatorDefaults(DeviceIntPtr dev, int axnum)
{
    if (axnum == 0) {
	dev->valuator->axisVal[0] = screenInfo.screens[0]->width / 2;
        dev->last.valuators[0] = dev->valuator->axisVal[0];
    }
    else if (axnum == 1) {
	dev->valuator->axisVal[1] = screenInfo.screens[0]->height / 2;
        dev->last.valuators[1] = dev->valuator->axisVal[1];
    }

    if(axnum == 0)  /* to prevent double invocation */
	ApplyAccelerationSettings(dev);
}


/**
 * Deactivate a device. Call this function from the driver if you receive a
 * read error or something else that spoils your day.
 * Device will be moved to the off_devices list, but it will still be there
 * until you really clean up after it.
 * Notifies the client about an inactive device.
 * 
 * @param panic True if device is unrecoverable and needs to be removed.
 */
void
xf86DisableDevice(DeviceIntPtr dev, Bool panic)
{
    devicePresenceNotify ev;
    DeviceIntRec dummyDev;

    if(!panic)
    {
        DisableDevice(dev);
    } else
    {
        ev.type = DevicePresenceNotify;
        ev.time = currentTime.milliseconds;
        ev.devchange = DeviceUnrecoverable;
        ev.deviceid = dev->id;
        dummyDev.id = 0;
        SendEventToAllWindows(&dummyDev, DevicePresenceNotifyMask,
                (xEvent *) &ev, 1);

        DeleteInputDeviceRequest(dev);
    }
}

/**
 * Reactivate a device. Call this function from the driver if you just found
 * out that the read error wasn't quite that bad after all.
 * Device will be re-activated, and an event sent to the client. 
 */
void
xf86EnableDevice(DeviceIntPtr dev)
{
    EnableDevice(dev);
}

/* end of xf86Xinput.c */