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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for the Auvitek USB bridge4 *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 messages22 * 2 = USB handling23 * 4 = I2C related24 * 8 = Bridge related25 * 16 = IR related26 */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 0x0338#define _BULKPIPESIZE 0xffff39 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 0x0047#define CMD_REQUEST_OUT 0x0148 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, which113 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_CONTROLLER121static void au0828_media_graph_notify(struct media_entity *new,122 void *notify_data);123#endif124 125static void au0828_unregister_media_device(struct au0828_dev *dev)126{127#ifdef CONFIG_MEDIA_CONTROLLER128 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#endif151}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, before170 dev->usbdev is NULL, for poll (e.g: IR) try to access171 the device and fill the dmesg with error messages.172 Set the status so poll routines can check and avoid173 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_CONTROLLER199 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#endif207 return 0;208}209 210#ifdef CONFIG_MEDIA_CONTROLLER211static 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 connect221 * entities that were created prior to registering222 * 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 decoder305 * is the sink. Look for an active link between decoder and306 * source (tuner/s-video/Composite), if one exists, nothing307 * to do. If not, look for any active links between source308 * and any other entity. If one exists, source is busy. If309 * 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 start312 * 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_type328 * is AU0828_VMUX_TELEVISION.329 *330 * There is a problem when s_input is called to331 * change the default input. s_input will try to332 * enable_source before attempting to change the333 * input on the device, and will end up enabling334 * default source which is tuner.335 *336 * Additional logic is necessary in au0828 to detect337 * that the input has changed and enable the right338 * source. au0828 handles this case in its s_input.339 * It will disable the old source and enable the new340 * 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 multiple359 * enable_source calls from v4l_ioctls during360 * 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 same368 * for both. Allow sharing the active link between369 * their common source (tuner) and sink (decoder).370 * Starting pipeline between sharing entity and sink371 * will fail with pipe mismatch, while owner has an372 * active pipeline. Switch pipeline ownership from373 * 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 link424 * 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 source457 * (tuner/s-video/Composite) to the entity458 * When DVB/s-video/Composite owns tuner, it won't be in459 * 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 audio465 * has active pipeline and vice versa. In addition466 * handle the case when more than one video/vbi467 * 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 > 1481 * When audio owns the shared link with482 * more than one video users, avoid483 * disabling the source and/or switching484 * the owner until the last disable_source485 * call from video _close(). Use dev->users to486 * 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#endif557 558static int au0828_media_device_register(struct au0828_dev *dev,559 struct usb_device *udev)560{561#ifdef CONFIG_MEDIA_CONTROLLER562 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 connect584 * audio graph to our graph. In this case, audio585 * driver registered the device and there is no586 * entity_notify to be called when new entities587 * 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 by596 * au0828_enable_source.597 *598 * It also needs to disable the link between tuner and599 * decoder/demod, to avoid disable step when tuner is requested600 * by video or audio. Note that this step can't be done until dvb601 * 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#endif640 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 like664 * video stream wouldn't likely work, since 12 Mbps is generally665 * 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 in719 * au0828_usb_disconnect720 */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