aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/misc/ati_remote.c
blob: e8bbc619f6dfda0a14423caa6764ee01dd8b19b7 (plain) (blame)
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
/*
 *  USB ATI Remote support
 *
 *  Version 2.2.0 Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
 *  Version 2.1.1 Copyright (c) 2002 Vladimir Dergachev
 *
 *  This 2.2.0 version is a rewrite / cleanup of the 2.1.1 driver, including
 *  porting to the 2.6 kernel interfaces, along with other modification
 *  to better match the style of the existing usb/input drivers.  However, the
 *  protocol and hardware handling is essentially unchanged from 2.1.1.
 *
 *  The 2.1.1 driver was derived from the usbati_remote and usbkbd drivers by
 *  Vojtech Pavlik.
 *
 *  Changes:
 *
 *  Feb 2004: Torrey Hoffman <thoffman@arnor.net>
 *            Version 2.2.0
 *  Jun 2004: Torrey Hoffman <thoffman@arnor.net>
 *            Version 2.2.1
 *            Added key repeat support contributed by:
 *                Vincent Vanackere <vanackere@lif.univ-mrs.fr>
 *            Added support for the "Lola" remote contributed by:
 *                Seth Cohn <sethcohn@yahoo.com>
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *
 * Hardware & software notes
 *
 * These remote controls are distributed by ATI as part of their
 * "All-In-Wonder" video card packages.  The receiver self-identifies as a
 * "USB Receiver" with manufacturer "X10 Wireless Technology Inc".
 *
 * The "Lola" remote is available from X10.  See:
 *    http://www.x10.com/products/lola_sg1.htm
 * The Lola is similar to the ATI remote but has no mouse support, and slightly
 * different keys.
 *
 * It is possible to use multiple receivers and remotes on multiple computers
 * simultaneously by configuring them to use specific channels.
 *
 * The RF protocol used by the remote supports 16 distinct channels, 1 to 16.
 * Actually, it may even support more, at least in some revisions of the
 * hardware.
 *
 * Each remote can be configured to transmit on one channel as follows:
 *   - Press and hold the "hand icon" button.
 *   - When the red LED starts to blink, let go of the "hand icon" button.
 *   - When it stops blinking, input the channel code as two digits, from 01
 *     to 16, and press the hand icon again.
 *
 * The timing can be a little tricky.  Try loading the module with debug=1
 * to have the kernel print out messages about the remote control number
 * and mask.  Note: debugging prints remote numbers as zero-based hexadecimal.
 *
 * The driver has a "channel_mask" parameter. This bitmask specifies which
 * channels will be ignored by the module.  To mask out channels, just add
 * all the 2^channel_number values together.
 *
 * For instance, set channel_mask = 2^4 = 16 (binary 10000) to make ati_remote
 * ignore signals coming from remote controls transmitting on channel 4, but
 * accept all other channels.
 *
 * Or, set channel_mask = 65533, (0xFFFD), and all channels except 1 will be
 * ignored.
 *
 * The default is 0 (respond to all channels). Bit 0 and bits 17-32 of this
 * parameter are unused.
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
#include <linux/wait.h>
#include <linux/jiffies.h>

/*
 * Module and Version Information, Module Parameters
 */

#define ATI_REMOTE_VENDOR_ID		0x0bc7
#define LOLA_REMOTE_PRODUCT_ID		0x0002
#define LOLA2_REMOTE_PRODUCT_ID		0x0003
#define ATI_REMOTE_PRODUCT_ID		0x0004
#define NVIDIA_REMOTE_PRODUCT_ID	0x0005
#define MEDION_REMOTE_PRODUCT_ID	0x0006

#define DRIVER_VERSION	        "2.2.1"
#define DRIVER_AUTHOR           "Torrey Hoffman <thoffman@arnor.net>"
#define DRIVER_DESC             "ATI/X10 RF USB Remote Control"

#define NAME_BUFSIZE      80    /* size of product name, path buffers */
#define DATA_BUFSIZE      63    /* size of URB data buffers */

/*
 * Duplicate event filtering time.
 * Sequential, identical KIND_FILTERED inputs with less than
 * FILTER_TIME milliseconds between them are considered as repeat
 * events. The hardware generates 5 events for the first keypress
 * and we have to take this into account for an accurate repeat
 * behaviour.
 */
#define FILTER_TIME	60 /* msec */
#define REPEAT_DELAY	500 /* msec */

static unsigned long channel_mask;
module_param(channel_mask, ulong, 0644);
MODULE_PARM_DESC(channel_mask, "Bitmask of remote control channels to ignore");

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable extra debug messages and information");

static int repeat_filter = FILTER_TIME;
module_param(repeat_filter, int, 0644);
MODULE_PARM_DESC(repeat_filter, "Repeat filter time, default = 60 msec");

static int repeat_delay = REPEAT_DELAY;
module_param(repeat_delay, int, 0644);
MODULE_PARM_DESC(repeat_delay, "Delay before sending repeats, default = 500 msec");

#define dbginfo(dev, format, arg...) do { if (debug) dev_info(dev , format , ## arg); } while (0)
#undef err
#define err(format, arg...) printk(KERN_ERR format , ## arg)

static struct usb_device_id ati_remote_table[] = {
	{ USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA_REMOTE_PRODUCT_ID) },
	{ USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA2_REMOTE_PRODUCT_ID) },
	{ USB_DEVICE(ATI_REMOTE_VENDOR_ID, ATI_REMOTE_PRODUCT_ID) },
	{ USB_DEVICE(ATI_REMOTE_VENDOR_ID, NVIDIA_REMOTE_PRODUCT_ID) },
	{ USB_DEVICE(ATI_REMOTE_VENDOR_ID, MEDION_REMOTE_PRODUCT_ID) },
	{}	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, ati_remote_table);

/* Get hi and low bytes of a 16-bits int */
#define HI(a)	((unsigned char)((a) >> 8))
#define LO(a)	((unsigned char)((a) & 0xff))

#define SEND_FLAG_IN_PROGRESS	1
#define SEND_FLAG_COMPLETE	2

/* Device initialization strings */
static char init1[] = { 0x01, 0x00, 0x20, 0x14 };
static char init2[] = { 0x01, 0x00, 0x20, 0x14, 0x20, 0x20, 0x20 };

struct ati_remote {
	struct input_dev *idev;
	struct usb_device *udev;
	struct usb_interface *interface;

	struct urb *irq_urb;
	struct urb *out_urb;
	struct usb_endpoint_descriptor *endpoint_in;
	struct usb_endpoint_descriptor *endpoint_out;
	unsigned char *inbuf;
	unsigned char *outbuf;
	dma_addr_t inbuf_dma;
	dma_addr_t outbuf_dma;

	unsigned char old_data[2];  /* Detect duplicate events */
	unsigned long old_jiffies;
	unsigned long acc_jiffies;  /* handle acceleration */
	unsigned long first_jiffies;

	unsigned int repeat_count;

	char name[NAME_BUFSIZE];
	char phys[NAME_BUFSIZE];

	wait_queue_head_t wait;
	int send_flags;
};

/* "Kinds" of messages sent from the hardware to the driver. */
#define KIND_END        0
#define KIND_LITERAL    1   /* Simply pass to input system */
#define KIND_FILTERED   2   /* Add artificial key-up events, drop keyrepeats */
#define KIND_LU         3   /* Directional keypad diagonals - left up, */
#define KIND_RU         4   /*   right up,  */
#define KIND_LD         5   /*   left down, */
#define KIND_RD         6   /*   right down */
#define KIND_ACCEL      7   /* Directional keypad - left, right, up, down.*/

/* Translation table from hardware messages to input events. */
static const struct {
	short kind;
	unsigned char data1, data2;
	int type;
	unsigned int code;
	int value;
}  ati_remote_tbl[] = {
	/* Directional control pad axes */
	{KIND_ACCEL,   0x35, 0x70, EV_REL, REL_X, -1},	 /* left */
	{KIND_ACCEL,   0x36, 0x71, EV_REL, REL_X, 1},    /* right */
	{KIND_ACCEL,   0x37, 0x72, EV_REL, REL_Y, -1},	 /* up */
	{KIND_ACCEL,   0x38, 0x73, EV_REL, REL_Y, 1},    /* down */
	/* Directional control pad diagonals */
	{KIND_LU,      0x39, 0x74, EV_REL, 0, 0},        /* left up */
	{KIND_RU,      0x3a, 0x75, EV_REL, 0, 0},        /* right up */
	{KIND_LD,      0x3c, 0x77, EV_REL, 0, 0},        /* left down */
	{KIND_RD,      0x3b, 0x76, EV_REL, 0, 0},        /* right down */

	/* "Mouse button" buttons */
	{KIND_LITERAL, 0x3d, 0x78, EV_KEY, BTN_LEFT, 1}, /* left btn down */
	{KIND_LITERAL, 0x3e, 0x79, EV_KEY, BTN_LEFT, 0}, /* left btn up */
	{KIND_LITERAL, 0x41, 0x7c, EV_KEY, BTN_RIGHT, 1},/* right btn down */
	{KIND_LITERAL, 0x42, 0x7d, EV_KEY, BTN_RIGHT, 0},/* right btn up */

	/* Artificial "doubleclick" events are generated by the hardware.
	 * They are mapped to the "side" and "extra" mouse buttons here. */
	{KIND_FILTERED, 0x3f, 0x7a, EV_KEY, BTN_SIDE, 1}, /* left dblclick */
	{KIND_FILTERED, 0x43, 0x7e, EV_KEY, BTN_EXTRA, 1},/* right dblclick */

	/* keyboard. */
	{KIND_FILTERED, 0xd2, 0x0d, EV_KEY, KEY_1, 1},
	{KIND_FILTERED, 0xd3, 0x0e, EV_KEY, KEY_2, 1},
	{KIND_FILTERED, 0xd4, 0x0f, EV_KEY, KEY_3, 1},
	{KIND_FILTERED, 0xd5, 0x10, EV_KEY, KEY_4, 1},
	{KIND_FILTERED, 0xd6, 0x11, EV_KEY, KEY_5, 1},
	{KIND_FILTERED, 0xd7, 0x12, EV_KEY, KEY_6, 1},
	{KIND_FILTERED, 0xd8, 0x13, EV_KEY, KEY_7, 1},
	{KIND_FILTERED, 0xd9, 0x14, EV_KEY, KEY_8, 1},
	{KIND_FILTERED, 0xda, 0x15, EV_KEY, KEY_9, 1},
	{KIND_FILTERED, 0xdc, 0x17, EV_KEY, KEY_0, 1},
	{KIND_FILTERED, 0xc5, 0x00, EV_KEY, KEY_A, 1},
	{KIND_FILTERED, 0xc6, 0x01, EV_KEY, KEY_B, 1},
	{KIND_FILTERED, 0xde, 0x19, EV_KEY, KEY_C, 1},
	{KIND_FILTERED, 0xe0, 0x1b, EV_KEY, KEY_D, 1},
	{KIND_FILTERED, 0xe6, 0x21, EV_KEY, KEY_E, 1},
	{KIND_FILTERED, 0xe8, 0x23, EV_KEY, KEY_F, 1},

	/* "special" keys */
	{KIND_FILTERED, 0xdd, 0x18, EV_KEY, KEY_KPENTER, 1},    /* "check" */
	{KIND_FILTERED, 0xdb, 0x16, EV_KEY, KEY_MENU, 1},       /* "menu" */
	{KIND_FILTERED, 0xc7, 0x02, EV_KEY, KEY_POWER, 1},      /* Power */
	{KIND_FILTERED, 0xc8, 0x03, EV_KEY, KEY_TV, 1},         /* TV */
	{KIND_FILTERED, 0xc9, 0x04, EV_KEY, KEY_DVD, 1},        /* DVD */
	{KIND_FILTERED, 0xca, 0x05, EV_KEY, KEY_WWW, 1},        /* WEB */
	{KIND_FILTERED, 0xcb, 0x06, EV_KEY, KEY_BOOKMARKS, 1},  /* "book" */
	{KIND_FILTERED, 0xcc, 0x07, EV_KEY, KEY_EDIT, 1},       /* "hand" */
	{KIND_FILTERED, 0xe1, 0x1c, EV_KEY, KEY_COFFEE, 1},     /* "timer" */
	{KIND_FILTERED, 0xe5, 0x20, EV_KEY, KEY_FRONT, 1},      /* "max" */
	{KIND_FILTERED, 0xe2, 0x1d, EV_KEY, KEY_LEFT, 1},       /* left */
	{KIND_FILTERED, 0xe4, 0x1f, EV_KEY, KEY_RIGHT, 1},      /* right */
	{KIND_FILTERED, 0xe7, 0x22, EV_KEY, KEY_DOWN, 1},       /* down */
	{KIND_FILTERED, 0xdf, 0x1a, EV_KEY, KEY_UP, 1},         /* up */
	{KIND_FILTERED, 0xe3, 0x1e, EV_KEY, KEY_OK, 1},         /* "OK" */
	{KIND_FILTERED, 0xce, 0x09, EV_KEY, KEY_VOLUMEDOWN, 1}, /* VOL + */
	{KIND_FILTERED, 0xcd, 0x08, EV_KEY, KEY_VOLUMEUP, 1},   /* VOL - */
	{KIND_FILTERED, 0xcf, 0x0a, EV_KEY, KEY_MUTE, 1},       /* MUTE  */
	{KIND_FILTERED, 0xd0, 0x0b, EV_KEY, KEY_CHANNELUP, 1},  /* CH + */
	{KIND_FILTERED, 0xd1, 0x0c, EV_KEY, KEY_CHANNELDOWN, 1},/* CH - */
	{KIND_FILTERED, 0xec, 0x27, EV_KEY, KEY_RECORD, 1},     /* ( o) red */
	{KIND_FILTERED, 0xea, 0x25, EV_KEY, KEY_PLAY, 1},       /* ( >) */
	{KIND_FILTERED, 0xe9, 0x24, EV_KEY, KEY_REWIND, 1},     /* (<<) */
	{KIND_FILTERED, 0xeb, 0x26, EV_KEY, KEY_FORWARD, 1},    /* (>>) */
	{KIND_FILTERED, 0xed, 0x28, EV_KEY, KEY_STOP, 1},       /* ([]) */
	{KIND_FILTERED, 0xee, 0x29, EV_KEY, KEY_PAUSE, 1},      /* ('') */
	{KIND_FILTERED, 0xf0, 0x2b, EV_KEY, KEY_PREVIOUS, 1},   /* (<-) */
	{KIND_FILTERED, 0xef, 0x2a, EV_KEY, KEY_NEXT, 1},       /* (>+) */
	{KIND_FILTERED, 0xf2, 0x2D, EV_KEY, KEY_INFO, 1},       /* PLAYING */
	{KIND_FILTERED, 0xf3, 0x2E, EV_KEY, KEY_HOME, 1},       /* TOP */
	{KIND_FILTERED, 0xf4, 0x2F, EV_KEY, KEY_END, 1},        /* END */
	{KIND_FILTERED, 0xf5, 0x30, EV_KEY, KEY_SELECT, 1},     /* SELECT */

	{KIND_END, 0x00, 0x00, EV_MAX + 1, 0, 0}
};

/* Local function prototypes */
static int ati_remote_open		(struct input_dev *inputdev);
static void ati_remote_close		(struct input_dev *inputdev);
static int ati_remote_sendpacket	(struct ati_remote *ati_remote, u16 cmd, unsigned char *data);
static void ati_remote_irq_out		(struct urb *urb);
static void ati_remote_irq_in		(struct urb *urb);
static void ati_remote_input_report	(struct urb *urb);
static int ati_remote_initialize	(struct ati_remote *ati_remote);
static int ati_remote_probe		(struct usb_interface *interface, const struct usb_device_id *id);
static void ati_remote_disconnect	(struct usb_interface *interface);

/* usb specific object to register with the usb subsystem */
static struct usb_driver ati_remote_driver = {
	.name         = "ati_remote",
	.probe        = ati_remote_probe,
	.disconnect   = ati_remote_disconnect,
	.id_table     = ati_remote_table,
};

/*
 *	ati_remote_dump_input
 */
static void ati_remote_dump(struct device *dev, unsigned char *data,
			    unsigned int len)
{
	if ((len == 1) && (data[0] != (unsigned char)0xff) && (data[0] != 0x00))
		dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
	else if (len == 4)
		dev_warn(dev, "Weird key %02x %02x %02x %02x\n",
		     data[0], data[1], data[2], data[3]);
	else
		dev_warn(dev, "Weird data, len=%d %02x %02x %02x %02x %02x %02x ...\n",
		     len, data[0], data[1], data[2], data[3], data[4], data[5]);
}

/*
 *	ati_remote_open
 */
static int ati_remote_open(struct input_dev *inputdev)
{
	struct ati_remote *ati_remote = input_get_drvdata(inputdev);

	/* On first open, submit the read urb which was set up previously. */
	ati_remote->irq_urb->dev = ati_remote->udev;
	if (usb_submit_urb(ati_remote->irq_urb, GFP_KERNEL)) {
		dev_err(&ati_remote->interface->dev,
			"%s: usb_submit_urb failed!\n", __func__);
		return -EIO;
	}

	return 0;
}

/*
 *	ati_remote_close
 */
static void ati_remote_close(struct input_dev *inputdev)
{
	struct ati_remote *ati_remote = input_get_drvdata(inputdev);

	usb_kill_urb(ati_remote->irq_urb);
}

/*
 *		ati_remote_irq_out
 */
static void ati_remote_irq_out(struct urb *urb)
{
	struct ati_remote *ati_remote = urb->context;

	if (urb->status) {
		dev_dbg(&ati_remote->interface->dev, "%s: status %d\n",
			__func__, urb->status);
		return;
	}

	ati_remote->send_flags |= SEND_FLAG_COMPLETE;
	wmb();
	wake_up(&ati_remote->wait);
}

/*
 *	ati_remote_sendpacket
 *
 *	Used to send device initialization strings
 */
static int ati_remote_sendpacket(struct ati_remote *ati_remote, u16 cmd, unsigned char *data)
{
	int retval = 0;

	/* Set up out_urb */
	memcpy(ati_remote->out_urb->transfer_buffer + 1, data, LO(cmd));
	((char *) ati_remote->out_urb->transfer_buffer)[0] = HI(cmd);

	ati_remote->out_urb->transfer_buffer_length = LO(cmd) + 1;
	ati_remote->out_urb->dev = ati_remote->udev;
	ati_remote->send_flags = SEND_FLAG_IN_PROGRESS;

	retval = usb_submit_urb(ati_remote->out_urb, GFP_ATOMIC);
	if (retval) {
		dev_dbg(&ati_remote->interface->dev,
			 "sendpacket: usb_submit_urb failed: %d\n", retval);
		return retval;
	}

	wait_event_timeout(ati_remote->wait,
		((ati_remote->out_urb->status != -EINPROGRESS) ||
			(ati_remote->send_flags & SEND_FLAG_COMPLETE)),
		HZ);
	usb_kill_urb(ati_remote->out_urb);

	return retval;
}

/*
 *	ati_remote_event_lookup
 */
static int ati_remote_event_lookup(int rem, unsigned char d1, unsigned char d2)
{
	int i;

	for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
		/*
		 * Decide if the table entry matches the remote input.
		 */
		if ((((ati_remote_tbl[i].data1 & 0x0f) == (d1 & 0x0f))) &&
		    ((((ati_remote_tbl[i].data1 >> 4) -
		       (d1 >> 4) + rem) & 0x0f) == 0x0f) &&
		    (ati_remote_tbl[i].data2 == d2))
			return i;

	}
	return -1;
}

/*
 *	ati_remote_compute_accel
 *
 * Implements acceleration curve for directional control pad
 * If elapsed time since last event is > 1/4 second, user "stopped",
 * so reset acceleration. Otherwise, user is probably holding the control
 * pad down, so we increase acceleration, ramping up over two seconds to
 * a maximum speed.
 */
static int ati_remote_compute_accel(struct ati_remote *ati_remote)
{
	static const char accel[] = { 1, 2, 4, 6, 9, 13, 20 };
	unsigned long now = jiffies;
	int acc;

	if (time_after(now, ati_remote->old_jiffies + msecs_to_jiffies(250))) {
		acc = 1;
		ati_remote->acc_jiffies = now;
	}
	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(125)))
		acc = accel[0];
	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(250)))
		acc = accel[1];
	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(500)))
		acc = accel[2];
	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(1000)))
		acc = accel[3];
	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(1500)))
		acc = accel[4];
	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(2000)))
		acc = accel[5];
	else
		acc = accel[6];

	return acc;
}

/*
 *	ati_remote_report_input
 */
static void ati_remote_input_report(struct urb *urb)
{
	struct ati_remote *ati_remote = urb->context;
	unsigned char *data= ati_remote->inbuf;
	struct input_dev *dev = ati_remote->idev;
	int index, acc;
	int remote_num;

	/* Deal with strange looking inputs */
	if ( (urb->actual_length != 4) || (data[0] != 0x14) ||
		((data[3] & 0x0f) != 0x00) ) {
		ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
		return;
	}

	/* Mask unwanted remote channels.  */
	/* note: remote_num is 0-based, channel 1 on remote == 0 here */
	remote_num = (data[3] >> 4) & 0x0f;
        if (channel_mask & (1 << (remote_num + 1))) {
		dbginfo(&ati_remote->interface->dev,
			"Masked input from channel 0x%02x: data %02x,%02x, mask= 0x%02lx\n",
			remote_num, data[1], data[2], channel_mask);
		return;
	}

	/* Look up event code index in translation table */
	index = ati_remote_event_lookup(remote_num, data[1], data[2]);
	if (index < 0) {
		dev_warn(&ati_remote->interface->dev,
			 "Unknown input from channel 0x%02x: data %02x,%02x\n",
			 remote_num, data[1], data[2]);
		return;
	}
	dbginfo(&ati_remote->interface->dev,
		"channel 0x%02x; data %02x,%02x; index %d; keycode %d\n",
		remote_num, data[1], data[2], index, ati_remote_tbl[index].code);

	if (ati_remote_tbl[index].kind == KIND_LITERAL) {
		input_event(dev, ati_remote_tbl[index].type,
			ati_remote_tbl[index].code,
			ati_remote_tbl[index].value);
		input_sync(dev);

		ati_remote->old_jiffies = jiffies;
		return;
	}

	if (ati_remote_tbl[index].kind == KIND_FILTERED) {
		unsigned long now = jiffies;

		/* Filter duplicate events which happen "too close" together. */
		if (ati_remote->old_data[0] == data[1] &&
		    ati_remote->old_data[1] == data[2] &&
		    time_before(now, ati_remote->old_jiffies +
				     msecs_to_jiffies(repeat_filter))) {
			ati_remote->repeat_count++;
		} else {
			ati_remote->repeat_count = 0;
			ati_remote->first_jiffies = now;
		}

		ati_remote->old_data[0] = data[1];
		ati_remote->old_data[1] = data[2];
		ati_remote->old_jiffies = now;

		/* Ensure we skip at least the 4 first duplicate events (generated
		 * by a single keypress), and continue skipping until repeat_delay
		 * msecs have passed
		 */
		if (ati_remote->repeat_count > 0 &&
		    (ati_remote->repeat_count < 5 ||
		     time_before(now, ati_remote->first_jiffies +
				      msecs_to_jiffies(repeat_delay))))
			return;


		input_event(dev, ati_remote_tbl[index].type,
			ati_remote_tbl[index].code, 1);
		input_sync(dev);
		input_event(dev, ati_remote_tbl[index].type,
			ati_remote_tbl[index].code, 0);
		input_sync(dev);

	} else {

		/*
		 * Other event kinds are from the directional control pad, and have an
		 * acceleration factor applied to them.  Without this acceleration, the
		 * control pad is mostly unusable.
		 */
		acc = ati_remote_compute_accel(ati_remote);

		switch (ati_remote_tbl[index].kind) {
		case KIND_ACCEL:
			input_event(dev, ati_remote_tbl[index].type,
				ati_remote_tbl[index].code,
				ati_remote_tbl[index].value * acc);
			break;
		case KIND_LU:
			input_report_rel(dev, REL_X, -acc);
			input_report_rel(dev, REL_Y, -acc);
			break;
		case KIND_RU:
			input_report_rel(dev, REL_X, acc);
			input_report_rel(dev, REL_Y, -acc);
			break;
		case KIND_LD:
			input_report_rel(dev, REL_X, -acc);
			input_report_rel(dev, REL_Y, acc);
			break;
		case KIND_RD:
			input_report_rel(dev, REL_X, acc);
			input_report_rel(dev, REL_Y, acc);
			break;
		default:
			dev_dbg(&ati_remote->interface->dev, "ati_remote kind=%d\n",
				ati_remote_tbl[index].kind);
		}
		input_sync(dev);

		ati_remote->old_jiffies = jiffies;
		ati_remote->old_data[0] = data[1];
		ati_remote->old_data[1] = data[2];
	}
}

/*
 *	ati_remote_irq_in
 */
static void ati_remote_irq_in(struct urb *urb)
{
	struct ati_remote *ati_remote = urb->context;
	int retval;

	switch (urb->status) {
	case 0:			/* success */
		ati_remote_input_report(urb);
		break;
	case -ECONNRESET:	/* unlink */
	case -ENOENT:
	case -ESHUTDOWN:
		dev_dbg(&ati_remote->interface->dev, "%s: urb error status, unlink? \n",
			__func__);
		return;
	default:		/* error */
		dev_dbg(&ati_remote->interface->dev, "%s: Nonzero urb status %d\n",
			__func__, urb->status);
	}

	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
		dev_err(&ati_remote->interface->dev, "%s: usb_submit_urb()=%d\n",
			__func__, retval);
}

/*
 *	ati_remote_alloc_buffers
 */
static int ati_remote_alloc_buffers(struct usb_device *udev,
				    struct ati_remote *ati_remote)
{
	ati_remote->inbuf = usb_buffer_alloc(udev, DATA_BUFSIZE, GFP_ATOMIC,
					     &ati_remote->inbuf_dma);
	if (!ati_remote->inbuf)
		return -1;

	ati_remote->outbuf = usb_buffer_alloc(udev, DATA_BUFSIZE, GFP_ATOMIC,
					      &ati_remote->outbuf_dma);
	if (!ati_remote->outbuf)
		return -1;

	ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!ati_remote->irq_urb)
		return -1;

	ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!ati_remote->out_urb)
		return -1;

	return 0;
}

/*
 *	ati_remote_free_buffers
 */
static void ati_remote_free_buffers(struct ati_remote *ati_remote)
{
	usb_free_urb(ati_remote->irq_urb);
	usb_free_urb(ati_remote->out_urb);

	usb_buffer_free(ati_remote->udev, DATA_BUFSIZE,
		ati_remote->inbuf, ati_remote->inbuf_dma);

	usb_buffer_free(ati_remote->udev, DATA_BUFSIZE,
		ati_remote->outbuf, ati_remote->outbuf_dma);
}

static void ati_remote_input_init(struct ati_remote *ati_remote)
{
	struct input_dev *idev = ati_remote->idev;
	int i;

	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
	idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
	idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
	for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
		if (ati_remote_tbl[i].type == EV_KEY)
			set_bit(ati_remote_tbl[i].code, idev->keybit);

	input_set_drvdata(idev, ati_remote);

	idev->open = ati_remote_open;
	idev->close = ati_remote_close;

	idev->name = ati_remote->name;
	idev->phys = ati_remote->phys;

	usb_to_input_id(ati_remote->udev, &idev->id);
	idev->dev.parent = &ati_remote->udev->dev;
}

static int ati_remote_initialize(struct ati_remote *ati_remote)
{
	struct usb_device *udev = ati_remote->udev;
	int pipe, maxp;

	init_waitqueue_head(&ati_remote->wait);

	/* Set up irq_urb */
	pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
	maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
	maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;

	usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
			 maxp, ati_remote_irq_in, ati_remote,
			 ati_remote->endpoint_in->bInterval);
	ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
	ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	/* Set up out_urb */
	pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
	maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
	maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;

	usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
			 maxp, ati_remote_irq_out, ati_remote,
			 ati_remote->endpoint_out->bInterval);
	ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
	ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	/* send initialization strings */
	if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
	    (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
		dev_err(&ati_remote->interface->dev,
			 "Initializing ati_remote hardware failed.\n");
		return -EIO;
	}

	return 0;
}

/*
 *	ati_remote_probe
 */
static int ati_remote_probe(struct usb_interface *interface, const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(interface);
	struct usb_host_interface *iface_host = interface->cur_altsetting;
	struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
	struct ati_remote *ati_remote;
	struct input_dev *input_dev;
	int err = -ENOMEM;

	if (iface_host->desc.bNumEndpoints != 2) {
		err("%s: Unexpected desc.bNumEndpoints\n", __func__);
		return -ENODEV;
	}

	endpoint_in = &iface_host->endpoint[0].desc;
	endpoint_out = &iface_host->endpoint[1].desc;

	if (!usb_endpoint_is_int_in(endpoint_in)) {
		err("%s: Unexpected endpoint_in\n", __func__);
		return -ENODEV;
	}
	if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
		err("%s: endpoint_in message size==0? \n", __func__);
		return -ENODEV;
	}

	ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!ati_remote || !input_dev)
		goto fail1;

	/* Allocate URB buffers, URBs */
	if (ati_remote_alloc_buffers(udev, ati_remote))
		goto fail2;

	ati_remote->endpoint_in = endpoint_in;
	ati_remote->endpoint_out = endpoint_out;
	ati_remote->udev = udev;
	ati_remote->idev = input_dev;
	ati_remote->interface = interface;

	usb_make_path(udev, ati_remote->phys, sizeof(ati_remote->phys));
	strlcat(ati_remote->phys, "/input0", sizeof(ati_remote->phys));

	if (udev->manufacturer)
		strlcpy(ati_remote->name, udev->manufacturer, sizeof(ati_remote->name));

	if (udev->product)
		snprintf(ati_remote->name, sizeof(ati_remote->name),
			 "%s %s", ati_remote->name, udev->product);

	if (!strlen(ati_remote->name))
		snprintf(ati_remote->name, sizeof(ati_remote->name),
			DRIVER_DESC "(%04x,%04x)",
			le16_to_cpu(ati_remote->udev->descriptor.idVendor),
			le16_to_cpu(ati_remote->udev->descriptor.idProduct));

	ati_remote_input_init(ati_remote);

	/* Device Hardware Initialization - fills in ati_remote->idev from udev. */
	err = ati_remote_initialize(ati_remote);
	if (err)
		goto fail3;

	/* Set up and register input device */
	err = input_register_device(ati_remote->idev);
	if (err)
		goto fail3;

	usb_set_intfdata(interface, ati_remote);
	return 0;

 fail3:	usb_kill_urb(ati_remote->irq_urb);
	usb_kill_urb(ati_remote->out_urb);
 fail2:	ati_remote_free_buffers(ati_remote);
 fail1:	input_free_device(input_dev);
	kfree(ati_remote);
	return err;
}

/*
 *	ati_remote_disconnect
 */
static void ati_remote_disconnect(struct usb_interface *interface)
{
	struct ati_remote *ati_remote;

	ati_remote = usb_get_intfdata(interface);
	usb_set_intfdata(interface, NULL);
	if (!ati_remote) {
		dev_warn(&interface->dev, "%s - null device?\n", __func__);
		return;
	}

	usb_kill_urb(ati_remote->irq_urb);
	usb_kill_urb(ati_remote->out_urb);
	input_unregister_device(ati_remote->idev);
	ati_remote_free_buffers(ati_remote);
	kfree(ati_remote);
}

/*
 *	ati_remote_init
 */
static int __init ati_remote_init(void)
{
	int result;

	result = usb_register(&ati_remote_driver);
	if (result)
		printk(KERN_ERR KBUILD_MODNAME
		       ": usb_register error #%d\n", result);
	else
		printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
		       DRIVER_DESC "\n");

	return result;
}

/*
 *	ati_remote_exit
 */
static void __exit ati_remote_exit(void)
{
	usb_deregister(&ati_remote_driver);
}

/*
 *	module specification
 */

module_init(ati_remote_init);
module_exit(ati_remote_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");