1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  Driver for the Auvitek USB bridge
4 *
5 *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
6 */
7
8#include "au0828.h"
9#include "au8522.h"
10
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/videodev2.h>
14#include <media/v4l2-common.h>
15#include <linux/mutex.h>
16
17/* Due to enum tuner_pad_index */
18#include <media/tuner.h>
19
20/*
21 * 1 = General debug messages
22 * 2 = USB handling
23 * 4 = I2C related
24 * 8 = Bridge related
25 * 16 = IR related
26 */
27int au0828_debug;
28module_param_named(debug, au0828_debug, int, 0644);
29MODULE_PARM_DESC(debug,
30		 "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");
31
32static unsigned int disable_usb_speed_check;
33module_param(disable_usb_speed_check, int, 0444);
34MODULE_PARM_DESC(disable_usb_speed_check,
35		 "override min bandwidth requirement of 480M bps");
36
37#define _AU0828_BULKPIPE 0x03
38#define _BULKPIPESIZE 0xffff
39
40static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
41			    u16 index);
42static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
43	u16 index, unsigned char *cp, u16 size);
44
45/* USB Direction */
46#define CMD_REQUEST_IN		0x00
47#define CMD_REQUEST_OUT		0x01
48
49u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
50{
51	u8 result = 0;
52
53	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
54	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
55
56	return result;
57}
58
59u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
60{
61	dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
62	return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
63}
64
65static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
66	u16 index)
67{
68	int status = -ENODEV;
69
70	if (dev->usbdev) {
71
72		/* cp must be memory that has been allocated by kmalloc */
73		status = usb_control_msg(dev->usbdev,
74				usb_sndctrlpipe(dev->usbdev, 0),
75				request,
76				USB_DIR_OUT | USB_TYPE_VENDOR |
77					USB_RECIP_DEVICE,
78				value, index, NULL, 0, 1000);
79
80		status = min(status, 0);
81
82		if (status < 0) {
83			pr_err("%s() Failed sending control message, error %d.\n",
84				__func__, status);
85		}
86
87	}
88
89	return status;
90}
91
92static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
93	u16 index, unsigned char *cp, u16 size)
94{
95	int status = -ENODEV;
96	mutex_lock(&dev->mutex);
97	if (dev->usbdev) {
98		status = usb_control_msg(dev->usbdev,
99				usb_rcvctrlpipe(dev->usbdev, 0),
100				request,
101				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
102				value, index,
103				dev->ctrlmsg, size, 1000);
104
105		status = min(status, 0);
106
107		if (status < 0) {
108			pr_err("%s() Failed receiving control message, error %d.\n",
109				__func__, status);
110		}
111
112		/* the host controller requires heap allocated memory, which
113		   is why we didn't just pass "cp" into usb_control_msg */
114		memcpy(cp, dev->ctrlmsg, size);
115	}
116	mutex_unlock(&dev->mutex);
117	return status;
118}
119
120#ifdef CONFIG_MEDIA_CONTROLLER
121static void au0828_media_graph_notify(struct media_entity *new,
122				      void *notify_data);
123#endif
124
125static void au0828_unregister_media_device(struct au0828_dev *dev)
126{
127#ifdef CONFIG_MEDIA_CONTROLLER
128	struct media_device *mdev = dev->media_dev;
129	struct media_entity_notify *notify, *nextp;
130
131	if (!mdev || !media_devnode_is_registered(mdev->devnode))
132		return;
133
134	/* Remove au0828 entity_notify callbacks */
135	list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) {
136		if (notify->notify != au0828_media_graph_notify)
137			continue;
138		media_device_unregister_entity_notify(mdev, notify);
139	}
140
141	/* clear enable_source, disable_source */
142	mutex_lock(&mdev->graph_mutex);
143	dev->media_dev->source_priv = NULL;
144	dev->media_dev->enable_source = NULL;
145	dev->media_dev->disable_source = NULL;
146	mutex_unlock(&mdev->graph_mutex);
147
148	media_device_delete(dev->media_dev, KBUILD_MODNAME, THIS_MODULE);
149	dev->media_dev = NULL;
150#endif
151}
152
153void au0828_usb_release(struct au0828_dev *dev)
154{
155	au0828_unregister_media_device(dev);
156
157	/* I2C */
158	au0828_i2c_unregister(dev);
159
160	kfree(dev);
161}
162
163static void au0828_usb_disconnect(struct usb_interface *interface)
164{
165	struct au0828_dev *dev = usb_get_intfdata(interface);
166
167	dprintk(1, "%s()\n", __func__);
168
169	/* there is a small window after disconnect, before
170	   dev->usbdev is NULL, for poll (e.g: IR) try to access
171	   the device and fill the dmesg with error messages.
172	   Set the status so poll routines can check and avoid
173	   access after disconnect.
174	*/
175	set_bit(DEV_DISCONNECTED, &dev->dev_state);
176
177	au0828_rc_unregister(dev);
178	/* Digital TV */
179	au0828_dvb_unregister(dev);
180
181	usb_set_intfdata(interface, NULL);
182	mutex_lock(&dev->mutex);
183	dev->usbdev = NULL;
184	mutex_unlock(&dev->mutex);
185	if (au0828_analog_unregister(dev)) {
186		/*
187		 * No need to call au0828_usb_release() if V4L2 is enabled,
188		 * as this is already called via au0828_usb_v4l2_release()
189		 */
190		return;
191	}
192	au0828_usb_release(dev);
193}
194
195static int au0828_media_device_init(struct au0828_dev *dev,
196				    struct usb_device *udev)
197{
198#ifdef CONFIG_MEDIA_CONTROLLER
199	struct media_device *mdev;
200
201	mdev = media_device_usb_allocate(udev, KBUILD_MODNAME, THIS_MODULE);
202	if (IS_ERR(mdev))
203		return PTR_ERR(mdev);
204
205	dev->media_dev = mdev;
206#endif
207	return 0;
208}
209
210#ifdef CONFIG_MEDIA_CONTROLLER
211static void au0828_media_graph_notify(struct media_entity *new,
212				      void *notify_data)
213{
214	struct au0828_dev *dev = notify_data;
215	int ret;
216	struct media_entity *entity, *mixer = NULL, *decoder = NULL;
217
218	if (!new) {
219		/*
220		 * Called during au0828 probe time to connect
221		 * entities that were created prior to registering
222		 * the notify handler. Find mixer and decoder.
223		*/
224		media_device_for_each_entity(entity, dev->media_dev) {
225			if (entity->function == MEDIA_ENT_F_AUDIO_MIXER)
226				mixer = entity;
227			else if (entity->function == MEDIA_ENT_F_ATV_DECODER)
228				decoder = entity;
229		}
230		goto create_link;
231	}
232
233	switch (new->function) {
234	case MEDIA_ENT_F_AUDIO_MIXER:
235		mixer = new;
236		if (dev->decoder)
237			decoder = dev->decoder;
238		break;
239	case MEDIA_ENT_F_ATV_DECODER:
240		/* In case, Mixer is added first, find mixer and create link */
241		media_device_for_each_entity(entity, dev->media_dev) {
242			if (entity->function == MEDIA_ENT_F_AUDIO_MIXER)
243				mixer = entity;
244		}
245		decoder = new;
246		break;
247	default:
248		break;
249	}
250
251create_link:
252	if (decoder && mixer) {
253		ret = media_get_pad_index(decoder, MEDIA_PAD_FL_SOURCE,
254					  PAD_SIGNAL_AUDIO);
255		if (ret >= 0)
256			ret = media_create_pad_link(decoder, ret,
257						    mixer, 0,
258						    MEDIA_LNK_FL_ENABLED);
259		if (ret < 0)
260			dev_err(&dev->usbdev->dev,
261				"Mixer Pad Link Create Error: %d\n", ret);
262	}
263}
264
265static bool au0828_is_link_shareable(struct media_entity *owner,
266				     struct media_entity *entity)
267{
268	bool shareable = false;
269
270	/* Tuner link can be shared by audio, video, and VBI */
271	switch (owner->function) {
272	case MEDIA_ENT_F_IO_V4L:
273	case MEDIA_ENT_F_AUDIO_CAPTURE:
274	case MEDIA_ENT_F_IO_VBI:
275		if (entity->function == MEDIA_ENT_F_IO_V4L ||
276		    entity->function == MEDIA_ENT_F_AUDIO_CAPTURE ||
277		    entity->function == MEDIA_ENT_F_IO_VBI)
278			shareable = true;
279		break;
280	case MEDIA_ENT_F_DTV_DEMOD:
281	default:
282		break;
283	}
284	return shareable;
285}
286
287/* Callers should hold graph_mutex */
288static int au0828_enable_source(struct media_entity *entity,
289				struct media_pipeline *pipe)
290{
291	struct media_entity  *source, *find_source;
292	struct media_entity *sink;
293	struct media_link *link, *found_link = NULL;
294	int ret = 0;
295	struct media_device *mdev = entity->graph_obj.mdev;
296	struct au0828_dev *dev;
297
298	if (!mdev)
299		return -ENODEV;
300
301	dev = mdev->source_priv;
302
303	/*
304	 * For Audio and V4L2 entity, find the link to which decoder
305	 * is the sink. Look for an active link between decoder and
306	 * source (tuner/s-video/Composite), if one exists, nothing
307	 * to do. If not, look for any  active links between source
308	 * and any other entity. If one exists, source is busy. If
309	 * source is free, setup link and start pipeline from source.
310	 * For DVB FE entity, the source for the link is the tuner.
311	 * Check if tuner is available and setup link and start
312	 * pipeline.
313	*/
314	if (entity->function == MEDIA_ENT_F_DTV_DEMOD) {
315		sink = entity;
316		find_source = dev->tuner;
317	} else {
318		/* Analog isn't configured or register failed */
319		if (!dev->decoder) {
320			ret = -ENODEV;
321			goto end;
322		}
323
324		sink = dev->decoder;
325
326		/*
327		 * Default input is tuner and default input_type
328		 * is AU0828_VMUX_TELEVISION.
329		 *
330		 * There is a problem when s_input is called to
331		 * change the default input. s_input will try to
332		 * enable_source before attempting to change the
333		 * input on the device, and will end up enabling
334		 * default source which is tuner.
335		 *
336		 * Additional logic is necessary in au0828 to detect
337		 * that the input has changed and enable the right
338		 * source. au0828 handles this case in its s_input.
339		 * It will disable the old source and enable the new
340		 * source.
341		 *
342		*/
343		if (dev->input_type == AU0828_VMUX_TELEVISION)
344			find_source = dev->tuner;
345		else if (dev->input_type == AU0828_VMUX_SVIDEO ||
346			 dev->input_type == AU0828_VMUX_COMPOSITE)
347			find_source = &dev->input_ent[dev->input_type];
348		else {
349			/* unknown input - let user select input */
350			ret = 0;
351			goto end;
352		}
353	}
354
355	/* Is there an active link between sink and source */
356	if (dev->active_link) {
357		if (dev->active_link_owner == entity) {
358			/* This check is necessary to handle multiple
359			 * enable_source calls from v4l_ioctls during
360			 * the course of video/vbi application run-time.
361			*/
362			pr_debug("%s already owns the tuner\n", entity->name);
363			ret = 0;
364			goto end;
365		} else if (au0828_is_link_shareable(dev->active_link_owner,
366			   entity)) {
367			/* Either ALSA or Video own tuner. Sink is the same
368			 * for both. Allow sharing the active link between
369			 * their common source (tuner) and sink (decoder).
370			 * Starting pipeline between sharing entity and sink
371			 * will fail with pipe mismatch, while owner has an
372			 * active pipeline. Switch pipeline ownership from
373			 * user to owner when owner disables the source.
374			 */
375			dev->active_link_shared = true;
376			/* save the user info to use from disable */
377			dev->active_link_user = entity;
378			dev->active_link_user_pipe = pipe;
379			pr_debug("%s owns the tuner %s can share!\n",
380				 dev->active_link_owner->name,
381				 entity->name);
382			ret = 0;
383			goto end;
384		} else {
385			ret = -EBUSY;
386			goto end;
387		}
388	}
389
390	list_for_each_entry(link, &sink->links, list) {
391		/* Check sink, and source */
392		if (link->sink->entity == sink &&
393		    link->source->entity == find_source) {
394			found_link = link;
395			break;
396		}
397	}
398
399	if (!found_link) {
400		ret = -ENODEV;
401		goto end;
402	}
403
404	/* activate link between source and sink and start pipeline */
405	source = found_link->source->entity;
406	ret = __media_entity_setup_link(found_link, MEDIA_LNK_FL_ENABLED);
407	if (ret) {
408		pr_err("Activate link from %s->%s. Error %d\n",
409			source->name, sink->name, ret);
410		goto end;
411	}
412
413	ret = __media_pipeline_start(entity->pads, pipe);
414	if (ret) {
415		pr_err("Start Pipeline: %s->%s Error %d\n",
416			source->name, entity->name, ret);
417		ret = __media_entity_setup_link(found_link, 0);
418		if (ret)
419			pr_err("Deactivate link Error %d\n", ret);
420		goto end;
421	}
422
423	/* save link state to allow audio and video share the link
424	 * and not disable the link while the other is using it.
425	 * active_link_owner is used to deactivate the link.
426	*/
427	dev->active_link = found_link;
428	dev->active_link_owner = entity;
429	dev->active_source = source;
430	dev->active_sink = sink;
431
432	pr_info("Enabled Source: %s->%s->%s Ret %d\n",
433		 dev->active_source->name, dev->active_sink->name,
434		 dev->active_link_owner->name, ret);
435end:
436	pr_debug("%s end: ent:%s fnc:%d ret %d\n",
437		 __func__, entity->name, entity->function, ret);
438	return ret;
439}
440
441/* Callers should hold graph_mutex */
442static void au0828_disable_source(struct media_entity *entity)
443{
444	int ret = 0;
445	struct media_device *mdev = entity->graph_obj.mdev;
446	struct au0828_dev *dev;
447
448	if (!mdev)
449		return;
450
451	dev = mdev->source_priv;
452
453	if (!dev->active_link)
454		return;
455
456	/* link is active - stop pipeline from source
457	 * (tuner/s-video/Composite) to the entity
458	 * When DVB/s-video/Composite owns tuner, it won't be in
459	 * shared state.
460	 */
461	if (dev->active_link->sink->entity == dev->active_sink &&
462	    dev->active_link->source->entity == dev->active_source) {
463		/*
464		 * Prevent video from deactivating link when audio
465		 * has active pipeline and vice versa. In addition
466		 * handle the case when more than one video/vbi
467		 * application is sharing the link.
468		*/
469		bool owner_is_audio = false;
470
471		if (dev->active_link_owner->function ==
472		    MEDIA_ENT_F_AUDIO_CAPTURE)
473			owner_is_audio = true;
474
475		if (dev->active_link_shared) {
476			pr_debug("Shared link owner %s user %s %d\n",
477				 dev->active_link_owner->name,
478				 entity->name, dev->users);
479
480			/* Handle video device users > 1
481			 * When audio owns the shared link with
482			 * more than one video users, avoid
483			 * disabling the source and/or switching
484			 * the owner until the last disable_source
485			 * call from video _close(). Use dev->users to
486			 * determine when to switch/disable.
487			 */
488			if (dev->active_link_owner != entity) {
489				/* video device has users > 1 */
490				if (owner_is_audio && dev->users > 1)
491					return;
492
493				dev->active_link_user = NULL;
494				dev->active_link_user_pipe = NULL;
495				dev->active_link_shared = false;
496				return;
497			}
498
499			/* video owns the link and has users > 1 */
500			if (!owner_is_audio && dev->users > 1)
501				return;
502
503			/* stop pipeline */
504			__media_pipeline_stop(dev->active_link_owner->pads);
505			pr_debug("Pipeline stop for %s\n",
506				dev->active_link_owner->name);
507
508			ret = __media_pipeline_start(
509					dev->active_link_user->pads,
510					dev->active_link_user_pipe);
511			if (ret) {
512				pr_err("Start Pipeline: %s->%s %d\n",
513					dev->active_source->name,
514					dev->active_link_user->name,
515					ret);
516				goto deactivate_link;
517			}
518			/* link user is now the owner */
519			dev->active_link_owner = dev->active_link_user;
520			dev->active_link_user = NULL;
521			dev->active_link_user_pipe = NULL;
522			dev->active_link_shared = false;
523
524			pr_debug("Pipeline started for %s\n",
525				dev->active_link_owner->name);
526			return;
527		} else if (!owner_is_audio && dev->users > 1)
528			/* video/vbi owns the link and has users > 1 */
529			return;
530
531		if (dev->active_link_owner != entity)
532			return;
533
534		/* stop pipeline */
535		__media_pipeline_stop(dev->active_link_owner->pads);
536		pr_debug("Pipeline stop for %s\n",
537			dev->active_link_owner->name);
538
539deactivate_link:
540		ret = __media_entity_setup_link(dev->active_link, 0);
541		if (ret)
542			pr_err("Deactivate link Error %d\n", ret);
543
544		pr_info("Disabled Source: %s->%s->%s Ret %d\n",
545			 dev->active_source->name, dev->active_sink->name,
546			 dev->active_link_owner->name, ret);
547
548		dev->active_link = NULL;
549		dev->active_link_owner = NULL;
550		dev->active_source = NULL;
551		dev->active_sink = NULL;
552		dev->active_link_shared = false;
553		dev->active_link_user = NULL;
554	}
555}
556#endif
557
558static int au0828_media_device_register(struct au0828_dev *dev,
559					struct usb_device *udev)
560{
561#ifdef CONFIG_MEDIA_CONTROLLER
562	int ret;
563	struct media_entity *entity, *demod = NULL;
564	struct media_link *link;
565
566	if (!dev->media_dev)
567		return 0;
568
569	if (!media_devnode_is_registered(dev->media_dev->devnode)) {
570
571		/* register media device */
572		ret = media_device_register(dev->media_dev);
573		if (ret) {
574			media_device_delete(dev->media_dev, KBUILD_MODNAME,
575					    THIS_MODULE);
576			dev->media_dev = NULL;
577			dev_err(&udev->dev,
578				"Media Device Register Error: %d\n", ret);
579			return ret;
580		}
581	} else {
582		/*
583		 * Call au0828_media_graph_notify() to connect
584		 * audio graph to our graph. In this case, audio
585		 * driver registered the device and there is no
586		 * entity_notify to be called when new entities
587		 * are added. Invoke it now.
588		*/
589		au0828_media_graph_notify(NULL, (void *) dev);
590	}
591
592	/*
593	 * Find tuner, decoder and demod.
594	 *
595	 * The tuner and decoder should be cached, as they'll be used by
596	 *	au0828_enable_source.
597	 *
598	 * It also needs to disable the link between tuner and
599	 * decoder/demod, to avoid disable step when tuner is requested
600	 * by video or audio. Note that this step can't be done until dvb
601	 * graph is created during dvb register.
602	*/
603	media_device_for_each_entity(entity, dev->media_dev) {
604		switch (entity->function) {
605		case MEDIA_ENT_F_TUNER:
606			dev->tuner = entity;
607			break;
608		case MEDIA_ENT_F_ATV_DECODER:
609			dev->decoder = entity;
610			break;
611		case MEDIA_ENT_F_DTV_DEMOD:
612			demod = entity;
613			break;
614		}
615	}
616
617	/* Disable link between tuner->demod and/or tuner->decoder */
618	if (dev->tuner) {
619		list_for_each_entry(link, &dev->tuner->links, list) {
620			if (demod && link->sink->entity == demod)
621				media_entity_setup_link(link, 0);
622			if (dev->decoder && link->sink->entity == dev->decoder)
623				media_entity_setup_link(link, 0);
624		}
625	}
626
627	/* register entity_notify callback */
628	dev->entity_notify.notify_data = (void *) dev;
629	dev->entity_notify.notify = (void *) au0828_media_graph_notify;
630	media_device_register_entity_notify(dev->media_dev,
631						  &dev->entity_notify);
632
633	/* set enable_source */
634	mutex_lock(&dev->media_dev->graph_mutex);
635	dev->media_dev->source_priv = (void *) dev;
636	dev->media_dev->enable_source = au0828_enable_source;
637	dev->media_dev->disable_source = au0828_disable_source;
638	mutex_unlock(&dev->media_dev->graph_mutex);
639#endif
640	return 0;
641}
642
643static int au0828_usb_probe(struct usb_interface *interface,
644	const struct usb_device_id *id)
645{
646	int ifnum;
647	int retval = 0;
648
649	struct au0828_dev *dev;
650	struct usb_device *usbdev = interface_to_usbdev(interface);
651
652	ifnum = interface->altsetting->desc.bInterfaceNumber;
653
654	if (ifnum != 0)
655		return -ENODEV;
656
657	dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
658		le16_to_cpu(usbdev->descriptor.idVendor),
659		le16_to_cpu(usbdev->descriptor.idProduct),
660		ifnum);
661
662	/*
663	 * Make sure we have 480 Mbps of bandwidth, otherwise things like
664	 * video stream wouldn't likely work, since 12 Mbps is generally
665	 * not enough even for most Digital TV streams.
666	 */
667	if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
668		pr_err("au0828: Device initialization failed.\n");
669		pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n");
670		return -ENODEV;
671	}
672
673	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
674	if (dev == NULL) {
675		pr_err("%s() Unable to allocate memory\n", __func__);
676		return -ENOMEM;
677	}
678
679	mutex_init(&dev->lock);
680	mutex_lock(&dev->lock);
681	mutex_init(&dev->mutex);
682	mutex_init(&dev->dvb.lock);
683	dev->usbdev = usbdev;
684	dev->boardnr = id->driver_info;
685	dev->board = au0828_boards[dev->boardnr];
686
687	/* Initialize the media controller */
688	retval = au0828_media_device_init(dev, usbdev);
689	if (retval) {
690		pr_err("%s() au0828_media_device_init failed\n",
691		       __func__);
692		mutex_unlock(&dev->lock);
693		kfree(dev);
694		return retval;
695	}
696
697	retval = au0828_v4l2_device_register(interface, dev);
698	if (retval) {
699		au0828_usb_v4l2_media_release(dev);
700		mutex_unlock(&dev->lock);
701		kfree(dev);
702		return retval;
703	}
704
705	/* Power Up the bridge */
706	au0828_write(dev, REG_600, 1 << 4);
707
708	/* Bring up the GPIO's and supporting devices */
709	au0828_gpio_setup(dev);
710
711	/* I2C */
712	au0828_i2c_register(dev);
713
714	/* Setup */
715	au0828_card_setup(dev);
716
717	/*
718	 * Store the pointer to the au0828_dev so it can be accessed in
719	 * au0828_usb_disconnect
720	 */
721	usb_set_intfdata(interface, dev);
722
723	/* Analog TV */
724	retval = au0828_analog_register(dev, interface);
725	if (retval) {
726		pr_err("%s() au0828_analog_register failed to register on V4L2\n",
727			__func__);
728		mutex_unlock(&dev->lock);
729		goto done;
730	}
731
732	/* Digital TV */
733	retval = au0828_dvb_register(dev);
734	if (retval)
735		pr_err("%s() au0828_dvb_register failed\n",
736		       __func__);
737
738	/* Remote controller */
739	au0828_rc_register(dev);
740
741	pr_info("Registered device AU0828 [%s]\n",
742		dev->board.name == NULL ? "Unset" : dev->board.name);
743
744	mutex_unlock(&dev->lock);
745
746	retval = au0828_media_device_register(dev, usbdev);
747
748done:
749	if (retval < 0)
750		au0828_usb_disconnect(interface);
751
752	return retval;
753}
754
755static int au0828_suspend(struct usb_interface *interface,
756				pm_message_t message)
757{
758	struct au0828_dev *dev = usb_get_intfdata(interface);
759
760	if (!dev)
761		return 0;
762
763	pr_info("Suspend\n");
764
765	au0828_rc_suspend(dev);
766	au0828_v4l2_suspend(dev);
767	au0828_dvb_suspend(dev);
768
769	/* FIXME: should suspend also ATV/DTV */
770
771	return 0;
772}
773
774static int au0828_resume(struct usb_interface *interface)
775{
776	struct au0828_dev *dev = usb_get_intfdata(interface);
777	if (!dev)
778		return 0;
779
780	pr_info("Resume\n");
781
782	/* Power Up the bridge */
783	au0828_write(dev, REG_600, 1 << 4);
784
785	/* Bring up the GPIO's and supporting devices */
786	au0828_gpio_setup(dev);
787
788	au0828_rc_resume(dev);
789	au0828_v4l2_resume(dev);
790	au0828_dvb_resume(dev);
791
792	/* FIXME: should resume also ATV/DTV */
793
794	return 0;
795}
796
797static struct usb_driver au0828_usb_driver = {
798	.name		= KBUILD_MODNAME,
799	.probe		= au0828_usb_probe,
800	.disconnect	= au0828_usb_disconnect,
801	.id_table	= au0828_usb_id_table,
802	.suspend	= au0828_suspend,
803	.resume		= au0828_resume,
804	.reset_resume	= au0828_resume,
805};
806
807static int __init au0828_init(void)
808{
809	int ret;
810
811	if (au0828_debug & 1)
812		pr_info("%s() Debugging is enabled\n", __func__);
813
814	if (au0828_debug & 2)
815		pr_info("%s() USB Debugging is enabled\n", __func__);
816
817	if (au0828_debug & 4)
818		pr_info("%s() I2C Debugging is enabled\n", __func__);
819
820	if (au0828_debug & 8)
821		pr_info("%s() Bridge Debugging is enabled\n",
822		       __func__);
823
824	if (au0828_debug & 16)
825		pr_info("%s() IR Debugging is enabled\n",
826		       __func__);
827
828	pr_info("au0828 driver loaded\n");
829
830	ret = usb_register(&au0828_usb_driver);
831	if (ret)
832		pr_err("usb_register failed, error = %d\n", ret);
833
834	return ret;
835}
836
837static void __exit au0828_exit(void)
838{
839	usb_deregister(&au0828_usb_driver);
840}
841
842module_init(au0828_init);
843module_exit(au0828_exit);
844
845MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
846MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
847MODULE_LICENSE("GPL");
848MODULE_VERSION("0.0.3");
849