aboutsummaryrefslogtreecommitdiff
path: root/drivers/input/misc/ati_remote2.c
blob: 0871d7b2df438172a3b6154eab786e88335beb3a (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
/*
 * ati_remote2 - ATI/Philips USB RF remote driver
 *
 * Copyright (C) 2005-2008 Ville Syrjala <syrjala@sci.fi>
 * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 */

#include <linux/usb/input.h>

#define DRIVER_DESC    "ATI/Philips USB RF remote driver"
#define DRIVER_VERSION "0.3"

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
MODULE_LICENSE("GPL");

/*
 * ATI Remote Wonder II Channel Configuration
 *
 * The remote control can by assigned one of sixteen "channels" in order to facilitate
 * the use of multiple remote controls within range of each other.
 * A remote's "channel" may be altered by pressing and holding the "PC" button for
 * approximately 3 seconds, after which the button will slowly flash the count of the
 * currently configured "channel", using the numeric keypad enter a number between 1 and
 * 16 and then press the "PC" button again, the button will slowly flash the count of the
 * newly configured "channel".
 */

enum {
	ATI_REMOTE2_MAX_CHANNEL_MASK = 0xFFFF,
	ATI_REMOTE2_MAX_MODE_MASK = 0x1F,
};

static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
module_param(channel_mask, uint, 0644);
MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");

static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
module_param(mode_mask, uint, 0644);
MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");

static struct usb_device_id ati_remote2_id_table[] = {
	{ USB_DEVICE(0x0471, 0x0602) },	/* ATI Remote Wonder II */
	{ }
};
MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);

static DEFINE_MUTEX(ati_remote2_mutex);

enum {
	ATI_REMOTE2_OPENED = 0x1,
	ATI_REMOTE2_SUSPENDED = 0x2,
};

enum {
	ATI_REMOTE2_AUX1,
	ATI_REMOTE2_AUX2,
	ATI_REMOTE2_AUX3,
	ATI_REMOTE2_AUX4,
	ATI_REMOTE2_PC,
	ATI_REMOTE2_MODES,
};

static const struct {
	u8  hw_code;
	u16 keycode;
} ati_remote2_key_table[] = {
	{ 0x00, KEY_0 },
	{ 0x01, KEY_1 },
	{ 0x02, KEY_2 },
	{ 0x03, KEY_3 },
	{ 0x04, KEY_4 },
	{ 0x05, KEY_5 },
	{ 0x06, KEY_6 },
	{ 0x07, KEY_7 },
	{ 0x08, KEY_8 },
	{ 0x09, KEY_9 },
	{ 0x0c, KEY_POWER },
	{ 0x0d, KEY_MUTE },
	{ 0x10, KEY_VOLUMEUP },
	{ 0x11, KEY_VOLUMEDOWN },
	{ 0x20, KEY_CHANNELUP },
	{ 0x21, KEY_CHANNELDOWN },
	{ 0x28, KEY_FORWARD },
	{ 0x29, KEY_REWIND },
	{ 0x2c, KEY_PLAY },
	{ 0x30, KEY_PAUSE },
	{ 0x31, KEY_STOP },
	{ 0x37, KEY_RECORD },
	{ 0x38, KEY_DVD },
	{ 0x39, KEY_TV },
	{ 0x3f, KEY_PROG1 }, /* AUX1-AUX4 and PC */
	{ 0x54, KEY_MENU },
	{ 0x58, KEY_UP },
	{ 0x59, KEY_DOWN },
	{ 0x5a, KEY_LEFT },
	{ 0x5b, KEY_RIGHT },
	{ 0x5c, KEY_OK },
	{ 0x78, KEY_A },
	{ 0x79, KEY_B },
	{ 0x7a, KEY_C },
	{ 0x7b, KEY_D },
	{ 0x7c, KEY_E },
	{ 0x7d, KEY_F },
	{ 0x82, KEY_ENTER },
	{ 0x8e, KEY_VENDOR },
	{ 0x96, KEY_COFFEE },
	{ 0xa9, BTN_LEFT },
	{ 0xaa, BTN_RIGHT },
	{ 0xbe, KEY_QUESTION },
	{ 0xd0, KEY_EDIT },
	{ 0xd5, KEY_FRONT },
	{ 0xf9, KEY_INFO },
};

struct ati_remote2 {
	struct input_dev *idev;
	struct usb_device *udev;

	struct usb_interface *intf[2];
	struct usb_endpoint_descriptor *ep[2];
	struct urb *urb[2];
	void *buf[2];
	dma_addr_t buf_dma[2];

	unsigned long jiffies;
	int mode;

	char name[64];
	char phys[64];

	/* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
	u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];

	unsigned int flags;

	unsigned int channel_mask;
	unsigned int mode_mask;
};

static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
static void ati_remote2_disconnect(struct usb_interface *interface);
static int ati_remote2_suspend(struct usb_interface *interface, pm_message_t message);
static int ati_remote2_resume(struct usb_interface *interface);
static int ati_remote2_reset_resume(struct usb_interface *interface);
static int ati_remote2_pre_reset(struct usb_interface *interface);
static int ati_remote2_post_reset(struct usb_interface *interface);

static struct usb_driver ati_remote2_driver = {
	.name       = "ati_remote2",
	.probe      = ati_remote2_probe,
	.disconnect = ati_remote2_disconnect,
	.id_table   = ati_remote2_id_table,
	.suspend    = ati_remote2_suspend,
	.resume     = ati_remote2_resume,
	.reset_resume = ati_remote2_reset_resume,
	.pre_reset  = ati_remote2_pre_reset,
	.post_reset = ati_remote2_post_reset,
	.supports_autosuspend = 1,
};

static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
{
	int r;

	r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
	if (r) {
		dev_err(&ar2->intf[0]->dev,
			"%s(): usb_submit_urb() = %d\n", __func__, r);
		return r;
	}
	r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
	if (r) {
		usb_kill_urb(ar2->urb[0]);
		dev_err(&ar2->intf[1]->dev,
			"%s(): usb_submit_urb() = %d\n", __func__, r);
		return r;
	}

	return 0;
}

static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
{
	usb_kill_urb(ar2->urb[1]);
	usb_kill_urb(ar2->urb[0]);
}

static int ati_remote2_open(struct input_dev *idev)
{
	struct ati_remote2 *ar2 = input_get_drvdata(idev);
	int r;

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	r = usb_autopm_get_interface(ar2->intf[0]);
	if (r) {
		dev_err(&ar2->intf[0]->dev,
			"%s(): usb_autopm_get_interface() = %d\n", __func__, r);
		goto fail1;
	}

	mutex_lock(&ati_remote2_mutex);

	if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
		r = ati_remote2_submit_urbs(ar2);
		if (r)
			goto fail2;
	}

	ar2->flags |= ATI_REMOTE2_OPENED;

	mutex_unlock(&ati_remote2_mutex);

	usb_autopm_put_interface(ar2->intf[0]);

	return 0;

 fail2:
	mutex_unlock(&ati_remote2_mutex);
	usb_autopm_put_interface(ar2->intf[0]);
 fail1:
	return r;
}

static void ati_remote2_close(struct input_dev *idev)
{
	struct ati_remote2 *ar2 = input_get_drvdata(idev);

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	mutex_lock(&ati_remote2_mutex);

	if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
		ati_remote2_kill_urbs(ar2);

	ar2->flags &= ~ATI_REMOTE2_OPENED;

	mutex_unlock(&ati_remote2_mutex);
}

static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
{
	struct input_dev *idev = ar2->idev;
	u8 *data = ar2->buf[0];
	int channel, mode;

	channel = data[0] >> 4;

	if (!((1 << channel) & ar2->channel_mask))
		return;

	mode = data[0] & 0x0F;

	if (mode > ATI_REMOTE2_PC) {
		dev_err(&ar2->intf[0]->dev,
			"Unknown mode byte (%02x %02x %02x %02x)\n",
			data[3], data[2], data[1], data[0]);
		return;
	}

	if (!((1 << mode) & ar2->mode_mask))
		return;

	input_event(idev, EV_REL, REL_X, (s8) data[1]);
	input_event(idev, EV_REL, REL_Y, (s8) data[2]);
	input_sync(idev);
}

static int ati_remote2_lookup(unsigned int hw_code)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
		if (ati_remote2_key_table[i].hw_code == hw_code)
			return i;

	return -1;
}

static void ati_remote2_input_key(struct ati_remote2 *ar2)
{
	struct input_dev *idev = ar2->idev;
	u8 *data = ar2->buf[1];
	int channel, mode, hw_code, index;

	channel = data[0] >> 4;

	if (!((1 << channel) & ar2->channel_mask))
		return;

	mode = data[0] & 0x0F;

	if (mode > ATI_REMOTE2_PC) {
		dev_err(&ar2->intf[1]->dev,
			"Unknown mode byte (%02x %02x %02x %02x)\n",
			data[3], data[2], data[1], data[0]);
		return;
	}

	hw_code = data[2];
	if (hw_code == 0x3f) {
		/*
		 * For some incomprehensible reason the mouse pad generates
		 * events which look identical to the events from the last
		 * pressed mode key. Naturally we don't want to generate key
		 * events for the mouse pad so we filter out any subsequent
		 * events from the same mode key.
		 */
		if (ar2->mode == mode)
			return;

		if (data[1] == 0)
			ar2->mode = mode;
	}

	if (!((1 << mode) & ar2->mode_mask))
		return;

	index = ati_remote2_lookup(hw_code);
	if (index < 0) {
		dev_err(&ar2->intf[1]->dev,
			"Unknown code byte (%02x %02x %02x %02x)\n",
			data[3], data[2], data[1], data[0]);
		return;
	}

	switch (data[1]) {
	case 0:	/* release */
		break;
	case 1:	/* press */
		ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
		break;
	case 2:	/* repeat */

		/* No repeat for mouse buttons. */
		if (ar2->keycode[mode][index] == BTN_LEFT ||
		    ar2->keycode[mode][index] == BTN_RIGHT)
			return;

		if (!time_after_eq(jiffies, ar2->jiffies))
			return;

		ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
		break;
	default:
		dev_err(&ar2->intf[1]->dev,
			"Unknown state byte (%02x %02x %02x %02x)\n",
			data[3], data[2], data[1], data[0]);
		return;
	}

	input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
	input_sync(idev);
}

static void ati_remote2_complete_mouse(struct urb *urb)
{
	struct ati_remote2 *ar2 = urb->context;
	int r;

	switch (urb->status) {
	case 0:
		usb_mark_last_busy(ar2->udev);
		ati_remote2_input_mouse(ar2);
		break;
	case -ENOENT:
	case -EILSEQ:
	case -ECONNRESET:
	case -ESHUTDOWN:
		dev_dbg(&ar2->intf[0]->dev,
			"%s(): urb status = %d\n", __func__, urb->status);
		return;
	default:
		usb_mark_last_busy(ar2->udev);
		dev_err(&ar2->intf[0]->dev,
			"%s(): urb status = %d\n", __func__, urb->status);
	}

	r = usb_submit_urb(urb, GFP_ATOMIC);
	if (r)
		dev_err(&ar2->intf[0]->dev,
			"%s(): usb_submit_urb() = %d\n", __func__, r);
}

static void ati_remote2_complete_key(struct urb *urb)
{
	struct ati_remote2 *ar2 = urb->context;
	int r;

	switch (urb->status) {
	case 0:
		usb_mark_last_busy(ar2->udev);
		ati_remote2_input_key(ar2);
		break;
	case -ENOENT:
	case -EILSEQ:
	case -ECONNRESET:
	case -ESHUTDOWN:
		dev_dbg(&ar2->intf[1]->dev,
			"%s(): urb status = %d\n", __func__, urb->status);
		return;
	default:
		usb_mark_last_busy(ar2->udev);
		dev_err(&ar2->intf[1]->dev,
			"%s(): urb status = %d\n", __func__, urb->status);
	}

	r = usb_submit_urb(urb, GFP_ATOMIC);
	if (r)
		dev_err(&ar2->intf[1]->dev,
			"%s(): usb_submit_urb() = %d\n", __func__, r);
}

static int ati_remote2_getkeycode(struct input_dev *idev,
				  int scancode, int *keycode)
{
	struct ati_remote2 *ar2 = input_get_drvdata(idev);
	int index, mode;

	mode = scancode >> 8;
	if (mode > ATI_REMOTE2_PC || !((1 << mode) & ar2->mode_mask))
		return -EINVAL;

	index = ati_remote2_lookup(scancode & 0xFF);
	if (index < 0)
		return -EINVAL;

	*keycode = ar2->keycode[mode][index];
	return 0;
}

static int ati_remote2_setkeycode(struct input_dev *idev, int scancode, int keycode)
{
	struct ati_remote2 *ar2 = input_get_drvdata(idev);
	int index, mode, old_keycode;

	mode = scancode >> 8;
	if (mode > ATI_REMOTE2_PC || !((1 << mode) & ar2->mode_mask))
		return -EINVAL;

	index = ati_remote2_lookup(scancode & 0xFF);
	if (index < 0)
		return -EINVAL;

	if (keycode < KEY_RESERVED || keycode > KEY_MAX)
		return -EINVAL;

	old_keycode = ar2->keycode[mode][index];
	ar2->keycode[mode][index] = keycode;
	set_bit(keycode, idev->keybit);

	for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
		for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
			if (ar2->keycode[mode][index] == old_keycode)
				return 0;
		}
	}

	clear_bit(old_keycode, idev->keybit);

	return 0;
}

static int ati_remote2_input_init(struct ati_remote2 *ar2)
{
	struct input_dev *idev;
	int index, mode, retval;

	idev = input_allocate_device();
	if (!idev)
		return -ENOMEM;

	ar2->idev = idev;
	input_set_drvdata(idev, ar2);

	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
	idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
		BIT_MASK(BTN_RIGHT);
	idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);

	for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
		for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
			ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
			set_bit(ar2->keycode[mode][index], idev->keybit);
		}
	}

	/* AUX1-AUX4 and PC generate the same scancode. */
	index = ati_remote2_lookup(0x3f);
	ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
	ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
	ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
	ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
	ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
	set_bit(KEY_PROG1, idev->keybit);
	set_bit(KEY_PROG2, idev->keybit);
	set_bit(KEY_PROG3, idev->keybit);
	set_bit(KEY_PROG4, idev->keybit);
	set_bit(KEY_PC, idev->keybit);

	idev->rep[REP_DELAY]  = 250;
	idev->rep[REP_PERIOD] = 33;

	idev->open = ati_remote2_open;
	idev->close = ati_remote2_close;

	idev->getkeycode = ati_remote2_getkeycode;
	idev->setkeycode = ati_remote2_setkeycode;

	idev->name = ar2->name;
	idev->phys = ar2->phys;

	usb_to_input_id(ar2->udev, &idev->id);
	idev->dev.parent = &ar2->udev->dev;

	retval = input_register_device(idev);
	if (retval)
		input_free_device(idev);

	return retval;
}

static int ati_remote2_urb_init(struct ati_remote2 *ar2)
{
	struct usb_device *udev = ar2->udev;
	int i, pipe, maxp;

	for (i = 0; i < 2; i++) {
		ar2->buf[i] = usb_buffer_alloc(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
		if (!ar2->buf[i])
			return -ENOMEM;

		ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
		if (!ar2->urb[i])
			return -ENOMEM;

		pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
		maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
		maxp = maxp > 4 ? 4 : maxp;

		usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
				 i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
				 ar2, ar2->ep[i]->bInterval);
		ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
		ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
	}

	return 0;
}

static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
{
	int i;

	for (i = 0; i < 2; i++) {
		usb_free_urb(ar2->urb[i]);
		usb_buffer_free(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
	}
}

static int ati_remote2_setup(struct ati_remote2 *ar2, unsigned int ch_mask)
{
	int r, i, channel;

	/*
	 * Configure receiver to only accept input from remote "channel"
	 *  channel == 0  -> Accept input from any remote channel
	 *  channel == 1  -> Only accept input from remote channel 1
	 *  channel == 2  -> Only accept input from remote channel 2
	 *  ...
	 *  channel == 16 -> Only accept input from remote channel 16
	 */

	channel = 0;
	for (i = 0; i < 16; i++) {
		if ((1 << i) & ch_mask) {
			if (!(~(1 << i) & ch_mask))
				channel = i + 1;
			break;
		}
	}

	r = usb_control_msg(ar2->udev, usb_sndctrlpipe(ar2->udev, 0),
			    0x20,
			    USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
			    channel, 0x0, NULL, 0, USB_CTRL_SET_TIMEOUT);
	if (r) {
		dev_err(&ar2->udev->dev, "%s - failed to set channel due to error: %d\n",
			__func__, r);
		return r;
	}

	return 0;
}

static ssize_t ati_remote2_show_channel_mask(struct device *dev,
					     struct device_attribute *attr,
					     char *buf)
{
	struct usb_device *udev = to_usb_device(dev);
	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
	struct ati_remote2 *ar2 = usb_get_intfdata(intf);

	return sprintf(buf, "0x%04x\n", ar2->channel_mask);
}

static ssize_t ati_remote2_store_channel_mask(struct device *dev,
					      struct device_attribute *attr,
					      const char *buf, size_t count)
{
	struct usb_device *udev = to_usb_device(dev);
	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
	struct ati_remote2 *ar2 = usb_get_intfdata(intf);
	unsigned long mask;
	int r;

	if (strict_strtoul(buf, 0, &mask))
		return -EINVAL;

	if (mask & ~ATI_REMOTE2_MAX_CHANNEL_MASK)
		return -EINVAL;

	r = usb_autopm_get_interface(ar2->intf[0]);
	if (r) {
		dev_err(&ar2->intf[0]->dev,
			"%s(): usb_autopm_get_interface() = %d\n", __func__, r);
		return r;
	}

	mutex_lock(&ati_remote2_mutex);

	if (mask != ar2->channel_mask && !ati_remote2_setup(ar2, mask))
		ar2->channel_mask = mask;

	mutex_unlock(&ati_remote2_mutex);

	usb_autopm_put_interface(ar2->intf[0]);

	return count;
}

static ssize_t ati_remote2_show_mode_mask(struct device *dev,
					  struct device_attribute *attr,
					  char *buf)
{
	struct usb_device *udev = to_usb_device(dev);
	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
	struct ati_remote2 *ar2 = usb_get_intfdata(intf);

	return sprintf(buf, "0x%02x\n", ar2->mode_mask);
}

static ssize_t ati_remote2_store_mode_mask(struct device *dev,
					   struct device_attribute *attr,
					   const char *buf, size_t count)
{
	struct usb_device *udev = to_usb_device(dev);
	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
	struct ati_remote2 *ar2 = usb_get_intfdata(intf);
	unsigned long mask;

	if (strict_strtoul(buf, 0, &mask))
		return -EINVAL;

	if (mask & ~ATI_REMOTE2_MAX_MODE_MASK)
		return -EINVAL;

	ar2->mode_mask = mask;

	return count;
}

static DEVICE_ATTR(channel_mask, 0644, ati_remote2_show_channel_mask,
		   ati_remote2_store_channel_mask);

static DEVICE_ATTR(mode_mask, 0644, ati_remote2_show_mode_mask,
		   ati_remote2_store_mode_mask);

static struct attribute *ati_remote2_attrs[] = {
	&dev_attr_channel_mask.attr,
	&dev_attr_mode_mask.attr,
	NULL,
};

static struct attribute_group ati_remote2_attr_group = {
	.attrs = ati_remote2_attrs,
};

static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(interface);
	struct usb_host_interface *alt = interface->cur_altsetting;
	struct ati_remote2 *ar2;
	int r;

	if (alt->desc.bInterfaceNumber)
		return -ENODEV;

	ar2 = kzalloc(sizeof (struct ati_remote2), GFP_KERNEL);
	if (!ar2)
		return -ENOMEM;

	ar2->udev = udev;

	ar2->intf[0] = interface;
	ar2->ep[0] = &alt->endpoint[0].desc;

	ar2->intf[1] = usb_ifnum_to_if(udev, 1);
	r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
	if (r)
		goto fail1;
	alt = ar2->intf[1]->cur_altsetting;
	ar2->ep[1] = &alt->endpoint[0].desc;

	r = ati_remote2_urb_init(ar2);
	if (r)
		goto fail2;

	ar2->channel_mask = channel_mask & ATI_REMOTE2_MAX_CHANNEL_MASK;
	ar2->mode_mask = mode_mask & ATI_REMOTE2_MAX_MODE_MASK;

	r = ati_remote2_setup(ar2, ar2->channel_mask);
	if (r)
		goto fail2;

	usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
	strlcat(ar2->phys, "/input0", sizeof(ar2->phys));

	strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));

	r = sysfs_create_group(&udev->dev.kobj, &ati_remote2_attr_group);
	if (r)
		goto fail2;

	r = ati_remote2_input_init(ar2);
	if (r)
		goto fail3;

	usb_set_intfdata(interface, ar2);

	interface->needs_remote_wakeup = 1;

	return 0;

 fail3:
	sysfs_remove_group(&udev->dev.kobj, &ati_remote2_attr_group);
 fail2:
	ati_remote2_urb_cleanup(ar2);
	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 fail1:
	kfree(ar2);

	return r;
}

static void ati_remote2_disconnect(struct usb_interface *interface)
{
	struct ati_remote2 *ar2;
	struct usb_host_interface *alt = interface->cur_altsetting;

	if (alt->desc.bInterfaceNumber)
		return;

	ar2 = usb_get_intfdata(interface);
	usb_set_intfdata(interface, NULL);

	input_unregister_device(ar2->idev);

	sysfs_remove_group(&ar2->udev->dev.kobj, &ati_remote2_attr_group);

	ati_remote2_urb_cleanup(ar2);

	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);

	kfree(ar2);
}

static int ati_remote2_suspend(struct usb_interface *interface,
			       pm_message_t message)
{
	struct ati_remote2 *ar2;
	struct usb_host_interface *alt = interface->cur_altsetting;

	if (alt->desc.bInterfaceNumber)
		return 0;

	ar2 = usb_get_intfdata(interface);

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	mutex_lock(&ati_remote2_mutex);

	if (ar2->flags & ATI_REMOTE2_OPENED)
		ati_remote2_kill_urbs(ar2);

	ar2->flags |= ATI_REMOTE2_SUSPENDED;

	mutex_unlock(&ati_remote2_mutex);

	return 0;
}

static int ati_remote2_resume(struct usb_interface *interface)
{
	struct ati_remote2 *ar2;
	struct usb_host_interface *alt = interface->cur_altsetting;
	int r = 0;

	if (alt->desc.bInterfaceNumber)
		return 0;

	ar2 = usb_get_intfdata(interface);

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	mutex_lock(&ati_remote2_mutex);

	if (ar2->flags & ATI_REMOTE2_OPENED)
		r = ati_remote2_submit_urbs(ar2);

	if (!r)
		ar2->flags &= ~ATI_REMOTE2_SUSPENDED;

	mutex_unlock(&ati_remote2_mutex);

	return r;
}

static int ati_remote2_reset_resume(struct usb_interface *interface)
{
	struct ati_remote2 *ar2;
	struct usb_host_interface *alt = interface->cur_altsetting;
	int r = 0;

	if (alt->desc.bInterfaceNumber)
		return 0;

	ar2 = usb_get_intfdata(interface);

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	mutex_lock(&ati_remote2_mutex);

	r = ati_remote2_setup(ar2, ar2->channel_mask);
	if (r)
		goto out;

	if (ar2->flags & ATI_REMOTE2_OPENED)
		r = ati_remote2_submit_urbs(ar2);

	if (!r)
		ar2->flags &= ~ATI_REMOTE2_SUSPENDED;

 out:
	mutex_unlock(&ati_remote2_mutex);

	return r;
}

static int ati_remote2_pre_reset(struct usb_interface *interface)
{
	struct ati_remote2 *ar2;
	struct usb_host_interface *alt = interface->cur_altsetting;

	if (alt->desc.bInterfaceNumber)
		return 0;

	ar2 = usb_get_intfdata(interface);

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	mutex_lock(&ati_remote2_mutex);

	if (ar2->flags == ATI_REMOTE2_OPENED)
		ati_remote2_kill_urbs(ar2);

	return 0;
}

static int ati_remote2_post_reset(struct usb_interface *interface)
{
	struct ati_remote2 *ar2;
	struct usb_host_interface *alt = interface->cur_altsetting;
	int r = 0;

	if (alt->desc.bInterfaceNumber)
		return 0;

	ar2 = usb_get_intfdata(interface);

	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);

	if (ar2->flags == ATI_REMOTE2_OPENED)
		r = ati_remote2_submit_urbs(ar2);

	mutex_unlock(&ati_remote2_mutex);

	return r;
}

static int __init ati_remote2_init(void)
{
	int r;

	r = usb_register(&ati_remote2_driver);
	if (r)
		printk(KERN_ERR "ati_remote2: usb_register() = %d\n", r);
	else
		printk(KERN_INFO "ati_remote2: " DRIVER_DESC " " DRIVER_VERSION "\n");

	return r;
}

static void __exit ati_remote2_exit(void)
{
	usb_deregister(&ati_remote2_driver);
}

module_init(ati_remote2_init);
module_exit(ati_remote2_exit);