summaryrefslogtreecommitdiff
path: root/drivers/media/usb/au0828/au0828-core.c
blob: cc22b32776ad1c5159bb4d04b22228fca1aab3ed (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
/*
 *  Driver for the Auvitek USB bridge
 *
 *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "au0828.h"
#include "au8522.h"

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/mutex.h>

/* Due to enum tuner_pad_index */
#include <media/tuner.h>

/*
 * 1 = General debug messages
 * 2 = USB handling
 * 4 = I2C related
 * 8 = Bridge related
 * 16 = IR related
 */
int au0828_debug;
module_param_named(debug, au0828_debug, int, 0644);
MODULE_PARM_DESC(debug,
		 "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");

static unsigned int disable_usb_speed_check;
module_param(disable_usb_speed_check, int, 0444);
MODULE_PARM_DESC(disable_usb_speed_check,
		 "override min bandwidth requirement of 480M bps");

#define _AU0828_BULKPIPE 0x03
#define _BULKPIPESIZE 0xffff

static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
			    u16 index);
static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index, unsigned char *cp, u16 size);

/* USB Direction */
#define CMD_REQUEST_IN		0x00
#define CMD_REQUEST_OUT		0x01

u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
{
	u8 result = 0;

	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);

	return result;
}

u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
{
	dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
	return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
}

static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index)
{
	int status = -ENODEV;

	if (dev->usbdev) {

		/* cp must be memory that has been allocated by kmalloc */
		status = usb_control_msg(dev->usbdev,
				usb_sndctrlpipe(dev->usbdev, 0),
				request,
				USB_DIR_OUT | USB_TYPE_VENDOR |
					USB_RECIP_DEVICE,
				value, index, NULL, 0, 1000);

		status = min(status, 0);

		if (status < 0) {
			pr_err("%s() Failed sending control message, error %d.\n",
				__func__, status);
		}

	}

	return status;
}

static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index, unsigned char *cp, u16 size)
{
	int status = -ENODEV;
	mutex_lock(&dev->mutex);
	if (dev->usbdev) {
		status = usb_control_msg(dev->usbdev,
				usb_rcvctrlpipe(dev->usbdev, 0),
				request,
				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				value, index,
				dev->ctrlmsg, size, 1000);

		status = min(status, 0);

		if (status < 0) {
			pr_err("%s() Failed receiving control message, error %d.\n",
				__func__, status);
		}

		/* the host controller requires heap allocated memory, which
		   is why we didn't just pass "cp" into usb_control_msg */
		memcpy(cp, dev->ctrlmsg, size);
	}
	mutex_unlock(&dev->mutex);
	return status;
}

static void au0828_unregister_media_device(struct au0828_dev *dev)
{

#ifdef CONFIG_MEDIA_CONTROLLER
	if (dev->media_dev &&
		media_devnode_is_registered(&dev->media_dev->devnode)) {
		/* clear enable_source, disable_source */
		dev->media_dev->source_priv = NULL;
		dev->media_dev->enable_source = NULL;
		dev->media_dev->disable_source = NULL;

		media_device_unregister(dev->media_dev);
		media_device_cleanup(dev->media_dev);
		kfree(dev->media_dev);
		dev->media_dev = NULL;
	}
#endif
}

void au0828_usb_release(struct au0828_dev *dev)
{
	au0828_unregister_media_device(dev);

	/* I2C */
	au0828_i2c_unregister(dev);

	kfree(dev);
}

static void au0828_usb_disconnect(struct usb_interface *interface)
{
	struct au0828_dev *dev = usb_get_intfdata(interface);

	dprintk(1, "%s()\n", __func__);

	/* there is a small window after disconnect, before
	   dev->usbdev is NULL, for poll (e.g: IR) try to access
	   the device and fill the dmesg with error messages.
	   Set the status so poll routines can check and avoid
	   access after disconnect.
	*/
	set_bit(DEV_DISCONNECTED, &dev->dev_state);

	au0828_rc_unregister(dev);
	/* Digital TV */
	au0828_dvb_unregister(dev);

	usb_set_intfdata(interface, NULL);
	mutex_lock(&dev->mutex);
	dev->usbdev = NULL;
	mutex_unlock(&dev->mutex);
	if (au0828_analog_unregister(dev)) {
		/*
		 * No need to call au0828_usb_release() if V4L2 is enabled,
		 * as this is already called via au0828_usb_v4l2_release()
		 */
		return;
	}
	au0828_usb_release(dev);
}

static int au0828_media_device_init(struct au0828_dev *dev,
				    struct usb_device *udev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
	struct media_device *mdev;

	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
	if (!mdev)
		return -ENOMEM;

	/* check if media device is already initialized */
	if (!mdev->dev)
		media_device_usb_init(mdev, udev, udev->product);

	dev->media_dev = mdev;
#endif
	return 0;
}

#ifdef CONFIG_MEDIA_CONTROLLER
static void au0828_media_graph_notify(struct media_entity *new,
				      void *notify_data)
{
	struct au0828_dev *dev = (struct au0828_dev *) notify_data;
	int ret;
	struct media_entity *entity, *mixer = NULL, *decoder = NULL;

	if (!new) {
		/*
		 * Called during au0828 probe time to connect
		 * entites that were created prior to registering
		 * the notify handler. Find mixer and decoder.
		*/
		media_device_for_each_entity(entity, dev->media_dev) {
			if (entity->function == MEDIA_ENT_F_AUDIO_MIXER)
				mixer = entity;
			else if (entity->function == MEDIA_ENT_F_ATV_DECODER)
				decoder = entity;
		}
		goto create_link;
	}

	switch (new->function) {
	case MEDIA_ENT_F_AUDIO_MIXER:
		mixer = new;
		if (dev->decoder)
			decoder = dev->decoder;
		break;
	case MEDIA_ENT_F_ATV_DECODER:
		/* In case, Mixer is added first, find mixer and create link */
		media_device_for_each_entity(entity, dev->media_dev) {
			if (entity->function == MEDIA_ENT_F_AUDIO_MIXER)
				mixer = entity;
		}
		decoder = new;
		break;
	default:
		break;
	}

create_link:
	if (decoder && mixer) {
		ret = media_create_pad_link(decoder,
					    DEMOD_PAD_AUDIO_OUT,
					    mixer, 0,
					    MEDIA_LNK_FL_ENABLED);
		if (ret)
			dev_err(&dev->usbdev->dev,
				"Mixer Pad Link Create Error: %d\n", ret);
	}
}

static int au0828_enable_source(struct media_entity *entity,
				struct media_pipeline *pipe)
{
	struct media_entity  *source, *find_source;
	struct media_entity *sink;
	struct media_link *link, *found_link = NULL;
	int ret = 0;
	struct media_device *mdev = entity->graph_obj.mdev;
	struct au0828_dev *dev;

	if (!mdev)
		return -ENODEV;

	mutex_lock(&mdev->graph_mutex);

	dev = mdev->source_priv;

	/*
	 * For Audio and V4L2 entity, find the link to which decoder
	 * is the sink. Look for an active link between decoder and
	 * source (tuner/s-video/Composite), if one exists, nothing
	 * to do. If not, look for any  active links between source
	 * and any other entity. If one exists, source is busy. If
	 * source is free, setup link and start pipeline from source.
	 * For DVB FE entity, the source for the link is the tuner.
	 * Check if tuner is available and setup link and start
	 * pipeline.
	*/
	if (entity->function == MEDIA_ENT_F_DTV_DEMOD) {
		sink = entity;
		find_source = dev->tuner;
	} else {
		/* Analog isn't configured or register failed */
		if (!dev->decoder) {
			ret = -ENODEV;
			goto end;
		}

		sink = dev->decoder;

		/*
		 * Default input is tuner and default input_type
		 * is AU0828_VMUX_TELEVISION.
		 * FIXME:
		 * There is a problem when s_input is called to
		 * change the default input. s_input will try to
		 * enable_source before attempting to change the
		 * input on the device, and will end up enabling
		 * default source which is tuner.
		 *
		 * Additional logic is necessary in au0828
		 * to detect that the input has changed and
		 * enable the right source.
		*/

		if (dev->input_type == AU0828_VMUX_TELEVISION)
			find_source = dev->tuner;
		else if (dev->input_type == AU0828_VMUX_SVIDEO ||
			 dev->input_type == AU0828_VMUX_COMPOSITE)
			find_source = &dev->input_ent[dev->input_type];
		else {
			/* unknown input - let user select input */
			ret = 0;
			goto end;
		}
	}

	/* Is an active link between sink and source */
	if (dev->active_link) {
		/*
		 * If DVB is using the tuner and calling entity is
		 * audio/video, the following check will be false,
		 * since sink is different. Result is Busy.
		 */
		if (dev->active_link->sink->entity == sink &&
		    dev->active_link->source->entity == find_source) {
			/*
			 * Either ALSA or Video own tuner. sink is
			 * the same for both. Prevent Video stepping
			 * on ALSA when ALSA owns the source.
			*/
			if (dev->active_link_owner != entity &&
			    dev->active_link_owner->function ==
						MEDIA_ENT_F_AUDIO_CAPTURE) {
				pr_debug("ALSA has the tuner\n");
				ret = -EBUSY;
				goto end;
			}
			ret = 0;
			goto end;
		} else {
			ret = -EBUSY;
			goto end;
		}
	}

	list_for_each_entry(link, &sink->links, list) {
		/* Check sink, and source */
		if (link->sink->entity == sink &&
		    link->source->entity == find_source) {
			found_link = link;
			break;
		}
	}

	if (!found_link) {
		ret = -ENODEV;
		goto end;
	}

	/* activate link between source and sink and start pipeline */
	source = found_link->source->entity;
	ret = __media_entity_setup_link(found_link, MEDIA_LNK_FL_ENABLED);
	if (ret) {
		pr_err("Activate tuner link %s->%s. Error %d\n",
			source->name, sink->name, ret);
		goto end;
	}

	ret = __media_entity_pipeline_start(entity, pipe);
	if (ret) {
		pr_err("Start Pipeline: %s->%s Error %d\n",
			source->name, entity->name, ret);
		ret = __media_entity_setup_link(found_link, 0);
		pr_err("Deactivate link Error %d\n", ret);
		goto end;
	}
	/*
	 * save active link and active link owner to avoid audio
	 * deactivating video owned link from disable_source and
	 * vice versa
	*/
	dev->active_link = found_link;
	dev->active_link_owner = entity;
	dev->active_source = source;
	dev->active_sink = sink;

	pr_debug("Enabled Source: %s->%s->%s Ret %d\n",
		 dev->active_source->name, dev->active_sink->name,
		 dev->active_link_owner->name, ret);
end:
	mutex_unlock(&mdev->graph_mutex);
	pr_debug("au0828_enable_source() end %s %d %d\n",
		 entity->name, entity->function, ret);
	return ret;
}

static void au0828_disable_source(struct media_entity *entity)
{
	int ret = 0;
	struct media_device *mdev = entity->graph_obj.mdev;
	struct au0828_dev *dev;

	if (!mdev)
		return;

	mutex_lock(&mdev->graph_mutex);
	dev = mdev->source_priv;

	if (!dev->active_link) {
		ret = -ENODEV;
		goto end;
	}

	/* link is active - stop pipeline from source (tuner) */
	if (dev->active_link->sink->entity == dev->active_sink &&
	    dev->active_link->source->entity == dev->active_source) {
		/*
		 * prevent video from deactivating link when audio
		 * has active pipeline
		*/
		if (dev->active_link_owner != entity)
			goto end;
		__media_entity_pipeline_stop(entity);
		ret = __media_entity_setup_link(dev->active_link, 0);
		if (ret)
			pr_err("Deactivate link Error %d\n", ret);

		pr_debug("Disabled Source: %s->%s->%s Ret %d\n",
			 dev->active_source->name, dev->active_sink->name,
			 dev->active_link_owner->name, ret);

		dev->active_link = NULL;
		dev->active_link_owner = NULL;
		dev->active_source = NULL;
		dev->active_sink = NULL;
	}

end:
	mutex_unlock(&mdev->graph_mutex);
}
#endif

static int au0828_media_device_register(struct au0828_dev *dev,
					struct usb_device *udev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
	int ret;
	struct media_entity *entity, *demod = NULL;
	struct media_link *link;

	if (!dev->media_dev)
		return 0;

	if (!media_devnode_is_registered(&dev->media_dev->devnode)) {

		/* register media device */
		ret = media_device_register(dev->media_dev);
		if (ret) {
			dev_err(&udev->dev,
				"Media Device Register Error: %d\n", ret);
			return ret;
		}
	} else {
		/*
		 * Call au0828_media_graph_notify() to connect
		 * audio graph to our graph. In this case, audio
		 * driver registered the device and there is no
		 * entity_notify to be called when new entities
		 * are added. Invoke it now.
		*/
		au0828_media_graph_notify(NULL, (void *) dev);
	}

	/*
	 * Find tuner, decoder and demod.
	 *
	 * The tuner and decoder should be cached, as they'll be used by
	 *	au0828_enable_source.
	 *
	 * It also needs to disable the link between tuner and
	 * decoder/demod, to avoid disable step when tuner is requested
	 * by video or audio. Note that this step can't be done until dvb
	 * graph is created during dvb register.
	*/
	media_device_for_each_entity(entity, dev->media_dev) {
		switch (entity->function) {
		case MEDIA_ENT_F_TUNER:
			dev->tuner = entity;
			break;
		case MEDIA_ENT_F_ATV_DECODER:
			dev->decoder = entity;
			break;
		case MEDIA_ENT_F_DTV_DEMOD:
			demod = entity;
			break;
		}
	}

	/* Disable link between tuner->demod and/or tuner->decoder */
	if (dev->tuner) {
		list_for_each_entry(link, &dev->tuner->links, list) {
			if (demod && link->sink->entity == demod)
				media_entity_setup_link(link, 0);
			if (dev->decoder && link->sink->entity == dev->decoder)
				media_entity_setup_link(link, 0);
		}
	}

	/* register entity_notify callback */
	dev->entity_notify.notify_data = (void *) dev;
	dev->entity_notify.notify = (void *) au0828_media_graph_notify;
	ret = media_device_register_entity_notify(dev->media_dev,
						  &dev->entity_notify);
	if (ret) {
		dev_err(&udev->dev,
			"Media Device register entity_notify Error: %d\n",
			ret);
		return ret;
	}
	/* set enable_source */
	dev->media_dev->source_priv = (void *) dev;
	dev->media_dev->enable_source = au0828_enable_source;
	dev->media_dev->disable_source = au0828_disable_source;
#endif
	return 0;
}

static int au0828_usb_probe(struct usb_interface *interface,
	const struct usb_device_id *id)
{
	int ifnum;
	int retval = 0;

	struct au0828_dev *dev;
	struct usb_device *usbdev = interface_to_usbdev(interface);

	ifnum = interface->altsetting->desc.bInterfaceNumber;

	if (ifnum != 0)
		return -ENODEV;

	dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
		le16_to_cpu(usbdev->descriptor.idVendor),
		le16_to_cpu(usbdev->descriptor.idProduct),
		ifnum);

	/*
	 * Make sure we have 480 Mbps of bandwidth, otherwise things like
	 * video stream wouldn't likely work, since 12 Mbps is generally
	 * not enough even for most Digital TV streams.
	 */
	if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
		pr_err("au0828: Device initialization failed.\n");
		pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n");
		return -ENODEV;
	}

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (dev == NULL) {
		pr_err("%s() Unable to allocate memory\n", __func__);
		return -ENOMEM;
	}

	mutex_init(&dev->lock);
	mutex_lock(&dev->lock);
	mutex_init(&dev->mutex);
	mutex_init(&dev->dvb.lock);
	dev->usbdev = usbdev;
	dev->boardnr = id->driver_info;
	dev->board = au0828_boards[dev->boardnr];

	/* Initialize the media controller */
	retval = au0828_media_device_init(dev, usbdev);
	if (retval) {
		pr_err("%s() au0828_media_device_init failed\n",
		       __func__);
		mutex_unlock(&dev->lock);
		kfree(dev);
		return retval;
	}

	retval = au0828_v4l2_device_register(interface, dev);
	if (retval) {
		au0828_usb_v4l2_media_release(dev);
		mutex_unlock(&dev->lock);
		kfree(dev);
		return retval;
	}

	/* Power Up the bridge */
	au0828_write(dev, REG_600, 1 << 4);

	/* Bring up the GPIO's and supporting devices */
	au0828_gpio_setup(dev);

	/* I2C */
	au0828_i2c_register(dev);

	/* Setup */
	au0828_card_setup(dev);

	/* Analog TV */
	retval = au0828_analog_register(dev, interface);
	if (retval) {
		pr_err("%s() au0282_dev_register failed to register on V4L2\n",
			__func__);
		goto done;
	}

	/* Digital TV */
	retval = au0828_dvb_register(dev);
	if (retval)
		pr_err("%s() au0282_dev_register failed\n",
		       __func__);

	/* Remote controller */
	au0828_rc_register(dev);

	/*
	 * Store the pointer to the au0828_dev so it can be accessed in
	 * au0828_usb_disconnect
	 */
	usb_set_intfdata(interface, dev);

	pr_info("Registered device AU0828 [%s]\n",
		dev->board.name == NULL ? "Unset" : dev->board.name);

	mutex_unlock(&dev->lock);

	retval = au0828_media_device_register(dev, usbdev);

done:
	if (retval < 0)
		au0828_usb_disconnect(interface);

	return retval;
}

static int au0828_suspend(struct usb_interface *interface,
				pm_message_t message)
{
	struct au0828_dev *dev = usb_get_intfdata(interface);

	if (!dev)
		return 0;

	pr_info("Suspend\n");

	au0828_rc_suspend(dev);
	au0828_v4l2_suspend(dev);
	au0828_dvb_suspend(dev);

	/* FIXME: should suspend also ATV/DTV */

	return 0;
}

static int au0828_resume(struct usb_interface *interface)
{
	struct au0828_dev *dev = usb_get_intfdata(interface);
	if (!dev)
		return 0;

	pr_info("Resume\n");

	/* Power Up the bridge */
	au0828_write(dev, REG_600, 1 << 4);

	/* Bring up the GPIO's and supporting devices */
	au0828_gpio_setup(dev);

	au0828_rc_resume(dev);
	au0828_v4l2_resume(dev);
	au0828_dvb_resume(dev);

	/* FIXME: should resume also ATV/DTV */

	return 0;
}

static struct usb_driver au0828_usb_driver = {
	.name		= KBUILD_MODNAME,
	.probe		= au0828_usb_probe,
	.disconnect	= au0828_usb_disconnect,
	.id_table	= au0828_usb_id_table,
	.suspend	= au0828_suspend,
	.resume		= au0828_resume,
	.reset_resume	= au0828_resume,
};

static int __init au0828_init(void)
{
	int ret;

	if (au0828_debug & 1)
		pr_info("%s() Debugging is enabled\n", __func__);

	if (au0828_debug & 2)
		pr_info("%s() USB Debugging is enabled\n", __func__);

	if (au0828_debug & 4)
		pr_info("%s() I2C Debugging is enabled\n", __func__);

	if (au0828_debug & 8)
		pr_info("%s() Bridge Debugging is enabled\n",
		       __func__);

	if (au0828_debug & 16)
		pr_info("%s() IR Debugging is enabled\n",
		       __func__);

	pr_info("au0828 driver loaded\n");

	ret = usb_register(&au0828_usb_driver);
	if (ret)
		pr_err("usb_register failed, error = %d\n", ret);

	return ret;
}

static void __exit au0828_exit(void)
{
	usb_deregister(&au0828_usb_driver);
}

module_init(au0828_init);
module_exit(au0828_exit);

MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.0.3");