drivers/media/video/hdpvr/hdpvr-video.c

   1 /*
   2  * Hauppauge HD PVR USB driver - video 4 linux 2 interface
   3  *
   4  * Copyright (C) 2008      Janne Grunau (j@jannau.net)
   5  *
   6  *      This program is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU General Public License as
   8  *      published by the Free Software Foundation, version 2.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/module.h>
  17 #include <linux/uaccess.h>
  18 #include <linux/usb.h>
  19 #include <linux/mutex.h>
  20 #include <linux/version.h>
  21 #include <linux/workqueue.h>
  22
  23 #include <linux/videodev2.h>
  24 #include <media/v4l2-dev.h>
  25 #include <media/v4l2-common.h>
  26 #include <media/v4l2-ioctl.h>
  27 #include "hdpvr.h"
  28
  29 #define BULK_URB_TIMEOUT 1250 /* 1.25 seconds */
  30
  31 #define print_buffer_status() { \
  32                 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,       \
  33                          "%s:%d buffer stat: %d free, %d proc\n",       \
  34                          __func__, __LINE__,                            \
  35                          list_size(&dev->free_buff_list),               \
  36                          list_size(&dev->rec_buff_list)); }
  37
  38 struct hdpvr_fh {
  39         struct hdpvr_device     *dev;
  40 };
  41
  42 static uint list_size(struct list_head *list)
  43 {
  44         struct list_head *tmp;
  45         uint count = 0;
  46
  47         list_for_each(tmp, list) {
  48                 count++;
  49         }
  50
  51         return count;
  52 }
  53
  54 /*=========================================================================*/
  55 /* urb callback */
  56 static void hdpvr_read_bulk_callback(struct urb *urb)
  57 {
  58         struct hdpvr_buffer *buf = (struct hdpvr_buffer *)urb->context;
  59         struct hdpvr_device *dev = buf->dev;
  60
  61         /* marking buffer as received and wake waiting */
  62         buf->status = BUFSTAT_READY;
  63         wake_up_interruptible(&dev->wait_data);
  64 }
  65
  66 /*=========================================================================*/
  67 /* bufffer bits */
  68
  69 /* function expects dev->io_mutex to be hold by caller */
  70 int hdpvr_cancel_queue(struct hdpvr_device *dev)
  71 {
  72         struct hdpvr_buffer *buf;
  73
  74         list_for_each_entry(buf, &dev->rec_buff_list, buff_list) {
  75                 usb_kill_urb(buf->urb);
  76                 buf->status = BUFSTAT_AVAILABLE;
  77         }
  78
  79         list_splice_init(&dev->rec_buff_list, dev->free_buff_list.prev);
  80
  81         return 0;
  82 }
  83
  84 static int hdpvr_free_queue(struct list_head *q)
  85 {
  86         struct list_head *tmp;
  87         struct list_head *p;
  88         struct hdpvr_buffer *buf;
  89         struct urb *urb;
  90
  91         for (p = q->next; p != q;) {
  92                 buf = list_entry(p, struct hdpvr_buffer, buff_list);
  93
  94                 urb = buf->urb;
  95                 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
  96                                   urb->transfer_buffer, urb->transfer_dma);
  97                 usb_free_urb(urb);
  98                 tmp = p->next;
  99                 list_del(p);
 100                 kfree(buf);
 101                 p = tmp;
 102         }
 103
 104         return 0;
 105 }
 106
 107 /* function expects dev->io_mutex to be hold by caller */
 108 int hdpvr_free_buffers(struct hdpvr_device *dev)
 109 {
 110         hdpvr_cancel_queue(dev);
 111
 112         hdpvr_free_queue(&dev->free_buff_list);
 113         hdpvr_free_queue(&dev->rec_buff_list);
 114
 115         return 0;
 116 }
 117
 118 /* function expects dev->io_mutex to be hold by caller */
 119 int hdpvr_alloc_buffers(struct hdpvr_device *dev, uint count)
 120 {
 121         uint i;
 122         int retval = -ENOMEM;
 123         u8 *mem;
 124         struct hdpvr_buffer *buf;
 125         struct urb *urb;
 126
 127         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 128                  "allocating %u buffers\n", count);
 129
 130         for (i = 0; i < count; i++) {
 131
 132                 buf = kzalloc(sizeof(struct hdpvr_buffer), GFP_KERNEL);
 133                 if (!buf) {
 134                         v4l2_err(&dev->v4l2_dev, "cannot allocate buffer\n");
 135                         goto exit;
 136                 }
 137                 buf->dev = dev;
 138
 139                 urb = usb_alloc_urb(0, GFP_KERNEL);
 140                 if (!urb) {
 141                         v4l2_err(&dev->v4l2_dev, "cannot allocate urb\n");
 142                         goto exit_urb;
 143                 }
 144                 buf->urb = urb;
 145
 146                 mem = usb_alloc_coherent(dev->udev, dev->bulk_in_size, GFP_KERNEL,
 147                                          &urb->transfer_dma);
 148                 if (!mem) {
 149                         v4l2_err(&dev->v4l2_dev,
 150                                  "cannot allocate usb transfer buffer\n");
 151                         goto exit_urb_buffer;
 152                 }
 153
 154                 usb_fill_bulk_urb(buf->urb, dev->udev,
 155                                   usb_rcvbulkpipe(dev->udev,
 156                                                   dev->bulk_in_endpointAddr),
 157                                   mem, dev->bulk_in_size,
 158                                   hdpvr_read_bulk_callback, buf);
 159
 160                 buf->status = BUFSTAT_AVAILABLE;
 161                 list_add_tail(&buf->buff_list, &dev->free_buff_list);
 162         }
 163         return 0;
 164 exit_urb_buffer:
 165         usb_free_urb(urb);
 166 exit_urb:
 167         kfree(buf);
 168 exit:
 169         hdpvr_free_buffers(dev);
 170         return retval;
 171 }
 172
 173 static int hdpvr_submit_buffers(struct hdpvr_device *dev)
 174 {
 175         struct hdpvr_buffer *buf;
 176         struct urb *urb;
 177         int ret = 0, err_count = 0;
 178
 179         mutex_lock(&dev->io_mutex);
 180
 181         while (dev->status == STATUS_STREAMING &&
 182                !list_empty(&dev->free_buff_list)) {
 183
 184                 buf = list_entry(dev->free_buff_list.next, struct hdpvr_buffer,
 185                                  buff_list);
 186                 if (buf->status != BUFSTAT_AVAILABLE) {
 187                         v4l2_err(&dev->v4l2_dev,
 188                                  "buffer not marked as available\n");
 189                         ret = -EFAULT;
 190                         goto err;
 191                 }
 192
 193                 urb = buf->urb;
 194                 urb->status = 0;
 195                 urb->actual_length = 0;
 196                 ret = usb_submit_urb(urb, GFP_KERNEL);
 197                 if (ret) {
 198                         v4l2_err(&dev->v4l2_dev,
 199                                  "usb_submit_urb in %s returned %d\n",
 200                                  __func__, ret);
 201                         if (++err_count > 2)
 202                                 break;
 203                         continue;
 204                 }
 205                 buf->status = BUFSTAT_INPROGRESS;
 206                 list_move_tail(&buf->buff_list, &dev->rec_buff_list);
 207         }
 208 err:
 209         print_buffer_status();
 210         mutex_unlock(&dev->io_mutex);
 211         return ret;
 212 }
 213
 214 static struct hdpvr_buffer *hdpvr_get_next_buffer(struct hdpvr_device *dev)
 215 {
 216         struct hdpvr_buffer *buf;
 217
 218         mutex_lock(&dev->io_mutex);
 219
 220         if (list_empty(&dev->rec_buff_list)) {
 221                 mutex_unlock(&dev->io_mutex);
 222                 return NULL;
 223         }
 224
 225         buf = list_entry(dev->rec_buff_list.next, struct hdpvr_buffer,
 226                          buff_list);
 227         mutex_unlock(&dev->io_mutex);
 228
 229         return buf;
 230 }
 231
 232 static void hdpvr_transmit_buffers(struct work_struct *work)
 233 {
 234         struct hdpvr_device *dev = container_of(work, struct hdpvr_device,
 235                                                 worker);
 236
 237         while (dev->status == STATUS_STREAMING) {
 238
 239                 if (hdpvr_submit_buffers(dev)) {
 240                         v4l2_err(&dev->v4l2_dev, "couldn't submit buffers\n");
 241                         goto error;
 242                 }
 243                 if (wait_event_interruptible(dev->wait_buffer,
 244                                 !list_empty(&dev->free_buff_list) ||
 245                                              dev->status != STATUS_STREAMING))
 246                         goto error;
 247         }
 248
 249         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 250                  "transmit worker exited\n");
 251         return;
 252 error:
 253         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 254                  "transmit buffers errored\n");
 255         dev->status = STATUS_ERROR;
 256 }
 257
 258 /* function expects dev->io_mutex to be hold by caller */
 259 static int hdpvr_start_streaming(struct hdpvr_device *dev)
 260 {
 261         int ret;
 262         struct hdpvr_video_info *vidinf;
 263
 264         if (dev->status == STATUS_STREAMING)
 265                 return 0;
 266         else if (dev->status != STATUS_IDLE)
 267                 return -EAGAIN;
 268
 269         vidinf = get_video_info(dev);
 270
 271         if (vidinf) {
 272                 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 273                          "video signal: %dx%d@%dhz\n", vidinf->width,
 274                          vidinf->height, vidinf->fps);
 275                 kfree(vidinf);
 276
 277                 /* start streaming 2 request */
 278                 ret = usb_control_msg(dev->udev,
 279                                       usb_sndctrlpipe(dev->udev, 0),
 280                                       0xb8, 0x38, 0x1, 0, NULL, 0, 8000);
 281                 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 282                          "encoder start control request returned %d\n", ret);
 283
 284                 hdpvr_config_call(dev, CTRL_START_STREAMING_VALUE, 0x00);
 285
 286                 INIT_WORK(&dev->worker, hdpvr_transmit_buffers);
 287                 queue_work(dev->workqueue, &dev->worker);
 288
 289                 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 290                          "streaming started\n");
 291                 dev->status = STATUS_STREAMING;
 292
 293                 return 0;
 294         }
 295         msleep(250);
 296         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 297                  "no video signal at input %d\n", dev->options.video_input);
 298         return -EAGAIN;
 299 }
 300
 301
 302 /* function expects dev->io_mutex to be hold by caller */
 303 static int hdpvr_stop_streaming(struct hdpvr_device *dev)
 304 {
 305         int actual_length;
 306         uint c = 0;
 307         u8 *buf;
 308
 309         if (dev->status == STATUS_IDLE)
 310                 return 0;
 311         else if (dev->status != STATUS_STREAMING)
 312                 return -EAGAIN;
 313
 314         buf = kmalloc(dev->bulk_in_size, GFP_KERNEL);
 315         if (!buf)
 316                 v4l2_err(&dev->v4l2_dev, "failed to allocate temporary buffer "
 317                          "for emptying the internal device buffer. "
 318                          "Next capture start will be slow\n");
 319
 320         dev->status = STATUS_SHUTTING_DOWN;
 321         hdpvr_config_call(dev, CTRL_STOP_STREAMING_VALUE, 0x00);
 322         mutex_unlock(&dev->io_mutex);
 323
 324         wake_up_interruptible(&dev->wait_buffer);
 325         msleep(50);
 326
 327         flush_workqueue(dev->workqueue);
 328
 329         mutex_lock(&dev->io_mutex);
 330         /* kill the still outstanding urbs */
 331         hdpvr_cancel_queue(dev);
 332
 333         /* emptying the device buffer beforeshutting it down */
 334         while (buf && ++c < 500 &&
 335                !usb_bulk_msg(dev->udev,
 336                              usb_rcvbulkpipe(dev->udev,
 337                                              dev->bulk_in_endpointAddr),
 338                              buf, dev->bulk_in_size, &actual_length,
 339                              BULK_URB_TIMEOUT)) {
 340                 /* wait */
 341                 msleep(5);
 342                 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 343                          "%2d: got %d bytes\n", c, actual_length);
 344         }
 345         kfree(buf);
 346         v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 347                  "used %d urbs to empty device buffers\n", c-1);
 348         msleep(10);
 349
 350         dev->status = STATUS_IDLE;
 351
 352         return 0;
 353 }
 354
 355
 356 /*=======================================================================*/
 357 /*
 358  * video 4 linux 2 file operations
 359  */
 360
 361 static int hdpvr_open(struct file *file)
 362 {
 363         struct hdpvr_device *dev;
 364         struct hdpvr_fh *fh;
 365         int retval = -ENOMEM;
 366
 367         dev = (struct hdpvr_device *)video_get_drvdata(video_devdata(file));
 368         if (!dev) {
 369                 v4l2_err(&dev->v4l2_dev, "open failing with with ENODEV\n");
 370                 retval = -ENODEV;
 371                 goto err;
 372         }
 373
 374         fh = kzalloc(sizeof(struct hdpvr_fh), GFP_KERNEL);
 375         if (!fh) {
 376                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
 377                 goto err;
 378         }
 379         /* lock the device to allow correctly handling errors
 380          * in resumption */
 381         mutex_lock(&dev->io_mutex);
 382         dev->open_count++;
 383         mutex_unlock(&dev->io_mutex);
 384
 385         fh->dev = dev;
 386
 387         /* save our object in the file's private structure */
 388         file->private_data = fh;
 389
 390         retval = 0;
 391 err:
 392         return retval;
 393 }
 394
 395 static int hdpvr_release(struct file *file)
 396 {
 397         struct hdpvr_fh         *fh  = (struct hdpvr_fh *)file->private_data;
 398         struct hdpvr_device     *dev = fh->dev;
 399
 400         if (!dev)
 401                 return -ENODEV;
 402
 403         mutex_lock(&dev->io_mutex);
 404         if (!(--dev->open_count) && dev->status == STATUS_STREAMING)
 405                 hdpvr_stop_streaming(dev);
 406
 407         mutex_unlock(&dev->io_mutex);
 408
 409         return 0;
 410 }
 411
 412 /*
 413  * hdpvr_v4l2_read()
 414  * will allocate buffers when called for the first time
 415  */
 416 static ssize_t hdpvr_read(struct file *file, char __user *buffer, size_t count,
 417                           loff_t *pos)
 418 {
 419         struct hdpvr_fh *fh = file->private_data;
 420         struct hdpvr_device *dev = fh->dev;
 421         struct hdpvr_buffer *buf = NULL;
 422         struct urb *urb;
 423         unsigned int ret = 0;
 424         int rem, cnt;
 425
 426         if (*pos)
 427                 return -ESPIPE;
 428
 429         if (!dev)
 430                 return -ENODEV;
 431
 432         mutex_lock(&dev->io_mutex);
 433         if (dev->status == STATUS_IDLE) {
 434                 if (hdpvr_start_streaming(dev)) {
 435                         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 436                                  "start_streaming failed\n");
 437                         ret = -EIO;
 438                         msleep(200);
 439                         dev->status = STATUS_IDLE;
 440                         mutex_unlock(&dev->io_mutex);
 441                         goto err;
 442                 }
 443                 print_buffer_status();
 444         }
 445         mutex_unlock(&dev->io_mutex);
 446
 447         /* wait for the first buffer */
 448         if (!(file->f_flags & O_NONBLOCK)) {
 449                 if (wait_event_interruptible(dev->wait_data,
 450                                              hdpvr_get_next_buffer(dev)))
 451                         return -ERESTARTSYS;
 452         }
 453
 454         buf = hdpvr_get_next_buffer(dev);
 455
 456         while (count > 0 && buf) {
 457
 458                 if (buf->status != BUFSTAT_READY &&
 459                     dev->status != STATUS_DISCONNECTED) {
 460                         /* return nonblocking */
 461                         if (file->f_flags & O_NONBLOCK) {
 462                                 if (!ret)
 463                                         ret = -EAGAIN;
 464                                 goto err;
 465                         }
 466
 467                         if (wait_event_interruptible(dev->wait_data,
 468                                               buf->status == BUFSTAT_READY)) {
 469                                 ret = -ERESTARTSYS;
 470                                 goto err;
 471                         }
 472                 }
 473
 474                 if (buf->status != BUFSTAT_READY)
 475                         break;
 476
 477                 /* set remaining bytes to copy */
 478                 urb = buf->urb;
 479                 rem = urb->actual_length - buf->pos;
 480                 cnt = rem > count ? count : rem;
 481
 482                 if (copy_to_user(buffer, urb->transfer_buffer + buf->pos,
 483                                  cnt)) {
 484                         v4l2_err(&dev->v4l2_dev, "read: copy_to_user failed\n");
 485                         if (!ret)
 486                                 ret = -EFAULT;
 487                         goto err;
 488                 }
 489
 490                 buf->pos += cnt;
 491                 count -= cnt;
 492                 buffer += cnt;
 493                 ret += cnt;
 494
 495                 /* finished, take next buffer */
 496                 if (buf->pos == urb->actual_length) {
 497                         mutex_lock(&dev->io_mutex);
 498                         buf->pos = 0;
 499                         buf->status = BUFSTAT_AVAILABLE;
 500
 501                         list_move_tail(&buf->buff_list, &dev->free_buff_list);
 502
 503                         print_buffer_status();
 504
 505                         mutex_unlock(&dev->io_mutex);
 506
 507                         wake_up_interruptible(&dev->wait_buffer);
 508
 509                         buf = hdpvr_get_next_buffer(dev);
 510                 }
 511         }
 512 err:
 513         if (!ret && !buf)
 514                 ret = -EAGAIN;
 515         return ret;
 516 }
 517
 518 static unsigned int hdpvr_poll(struct file *filp, poll_table *wait)
 519 {
 520         struct hdpvr_buffer *buf = NULL;
 521         struct hdpvr_fh *fh = (struct hdpvr_fh *)filp->private_data;
 522         struct hdpvr_device *dev = fh->dev;
 523         unsigned int mask = 0;
 524
 525         mutex_lock(&dev->io_mutex);
 526
 527         if (!video_is_registered(dev->video_dev)) {
 528                 mutex_unlock(&dev->io_mutex);
 529                 return -EIO;
 530         }
 531
 532         if (dev->status == STATUS_IDLE) {
 533                 if (hdpvr_start_streaming(dev)) {
 534                         v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
 535                                  "start_streaming failed\n");
 536                         dev->status = STATUS_IDLE;
 537                 }
 538
 539                 print_buffer_status();
 540         }
 541         mutex_unlock(&dev->io_mutex);
 542
 543         buf = hdpvr_get_next_buffer(dev);
 544         /* only wait if no data is available */
 545         if (!buf || buf->status != BUFSTAT_READY) {
 546                 poll_wait(filp, &dev->wait_data, wait);
 547                 buf = hdpvr_get_next_buffer(dev);
 548         }
 549         if (buf && buf->status == BUFSTAT_READY)
 550                 mask |= POLLIN | POLLRDNORM;
 551
 552         return mask;
 553 }
 554
 555
 556 static const struct v4l2_file_operations hdpvr_fops = {
 557         .owner          = THIS_MODULE,
 558         .open           = hdpvr_open,
 559         .release        = hdpvr_release,
 560         .read           = hdpvr_read,
 561         .poll           = hdpvr_poll,
 562         .unlocked_ioctl = video_ioctl2,
 563 };
 564
 565 /*=======================================================================*/
 566 /*
 567  * V4L2 ioctl handling
 568  */
 569
 570 static int vidioc_querycap(struct file *file, void  *priv,
 571                            struct v4l2_capability *cap)
 572 {
 573         struct hdpvr_device *dev = video_drvdata(file);
 574
 575         strcpy(cap->driver, "hdpvr");
 576         strcpy(cap->card, "Hauppauge HD PVR");
 577         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 578         cap->version = HDPVR_VERSION;
 579         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 580                                 V4L2_CAP_AUDIO         |
 581                                 V4L2_CAP_READWRITE;
 582         return 0;
 583 }
 584
 585 static int vidioc_s_std(struct file *file, void *private_data,
 586                         v4l2_std_id *std)
 587 {
 588         struct hdpvr_fh *fh = file->private_data;
 589         struct hdpvr_device *dev = fh->dev;
 590         u8 std_type = 1;
 591
 592         if (*std & (V4L2_STD_NTSC | V4L2_STD_PAL_60))
 593                 std_type = 0;
 594
 595         return hdpvr_config_call(dev, CTRL_VIDEO_STD_TYPE, std_type);
 596 }
 597
 598 static const char *iname[] = {
 599         [HDPVR_COMPONENT] = "Component",
 600         [HDPVR_SVIDEO]    = "S-Video",
 601         [HDPVR_COMPOSITE] = "Composite",
 602 };
 603
 604 static int vidioc_enum_input(struct file *file, void *priv,
 605                                 struct v4l2_input *i)
 606 {
 607         struct hdpvr_fh *fh = file->private_data;
 608         struct hdpvr_device *dev = fh->dev;
 609         unsigned int n;
 610
 611         n = i->index;
 612         if (n >= HDPVR_VIDEO_INPUTS)
 613                 return -EINVAL;
 614
 615         i->type = V4L2_INPUT_TYPE_CAMERA;
 616
 617         strncpy(i->name, iname[n], sizeof(i->name) - 1);
 618         i->name[sizeof(i->name) - 1] = '\0';
 619
 620         i->audioset = 1<<HDPVR_RCA_FRONT | 1<<HDPVR_RCA_BACK | 1<<HDPVR_SPDIF;
 621
 622         i->std = dev->video_dev->tvnorms;
 623
 624         return 0;
 625 }
 626
 627 static int vidioc_s_input(struct file *file, void *private_data,
 628                           unsigned int index)
 629 {
 630         struct hdpvr_fh *fh = file->private_data;
 631         struct hdpvr_device *dev = fh->dev;
 632         int retval;
 633
 634         if (index >= HDPVR_VIDEO_INPUTS)
 635                 return -EINVAL;
 636
 637         if (dev->status != STATUS_IDLE)
 638                 return -EAGAIN;
 639
 640         retval = hdpvr_config_call(dev, CTRL_VIDEO_INPUT_VALUE, index+1);
 641         if (!retval)
 642                 dev->options.video_input = index;
 643
 644         return retval;
 645 }
 646
 647 static int vidioc_g_input(struct file *file, void *private_data,
 648                           unsigned int *index)
 649 {
 650         struct hdpvr_fh *fh = file->private_data;
 651         struct hdpvr_device *dev = fh->dev;
 652
 653         *index = dev->options.video_input;
 654         return 0;
 655 }
 656
 657
 658 static const char *audio_iname[] = {
 659         [HDPVR_RCA_FRONT] = "RCA front",
 660         [HDPVR_RCA_BACK]  = "RCA back",
 661         [HDPVR_SPDIF]     = "SPDIF",
 662 };
 663
 664 static int vidioc_enumaudio(struct file *file, void *priv,
 665                                 struct v4l2_audio *audio)
 666 {
 667         unsigned int n;
 668
 669         n = audio->index;
 670         if (n >= HDPVR_AUDIO_INPUTS)
 671                 return -EINVAL;
 672
 673         audio->capability = V4L2_AUDCAP_STEREO;
 674
 675         strncpy(audio->name, audio_iname[n], sizeof(audio->name) - 1);
 676         audio->name[sizeof(audio->name) - 1] = '\0';
 677
 678         return 0;
 679 }
 680
 681 static int vidioc_s_audio(struct file *file, void *private_data,
 682                           struct v4l2_audio *audio)
 683 {
 684         struct hdpvr_fh *fh = file->private_data;
 685         struct hdpvr_device *dev = fh->dev;
 686         int retval;
 687
 688         if (audio->index >= HDPVR_AUDIO_INPUTS)
 689                 return -EINVAL;
 690
 691         if (dev->status != STATUS_IDLE)
 692                 return -EAGAIN;
 693
 694         retval = hdpvr_set_audio(dev, audio->index+1, dev->options.audio_codec);
 695         if (!retval)
 696                 dev->options.audio_input = audio->index;
 697
 698         return retval;
 699 }
 700
 701 static int vidioc_g_audio(struct file *file, void *private_data,
 702                           struct v4l2_audio *audio)
 703 {
 704         struct hdpvr_fh *fh = file->private_data;
 705         struct hdpvr_device *dev = fh->dev;
 706
 707         audio->index = dev->options.audio_input;
 708         audio->capability = V4L2_AUDCAP_STEREO;
 709         strncpy(audio->name, audio_iname[audio->index], sizeof(audio->name));
 710         audio->name[sizeof(audio->name) - 1] = '\0';
 711         return 0;
 712 }
 713
 714 static const s32 supported_v4l2_ctrls[] = {
 715         V4L2_CID_BRIGHTNESS,
 716         V4L2_CID_CONTRAST,
 717         V4L2_CID_SATURATION,
 718         V4L2_CID_HUE,
 719         V4L2_CID_SHARPNESS,
 720         V4L2_CID_MPEG_AUDIO_ENCODING,
 721         V4L2_CID_MPEG_VIDEO_ENCODING,
 722         V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 723         V4L2_CID_MPEG_VIDEO_BITRATE,
 724         V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 725 };
 726
 727 static int fill_queryctrl(struct hdpvr_options *opt, struct v4l2_queryctrl *qc,
 728                           int ac3)
 729 {
 730         int err;
 731
 732         switch (qc->id) {
 733         case V4L2_CID_BRIGHTNESS:
 734                 return v4l2_ctrl_query_fill(qc, 0x0, 0xff, 1, 0x86);
 735         case V4L2_CID_CONTRAST:
 736                 return v4l2_ctrl_query_fill(qc, 0x0, 0xff, 1, 0x80);
 737         case V4L2_CID_SATURATION:
 738                 return v4l2_ctrl_query_fill(qc, 0x0, 0xff, 1, 0x80);
 739         case V4L2_CID_HUE:
 740                 return v4l2_ctrl_query_fill(qc, 0x0, 0xff, 1, 0x80);
 741         case V4L2_CID_SHARPNESS:
 742                 return v4l2_ctrl_query_fill(qc, 0x0, 0xff, 1, 0x80);
 743         case V4L2_CID_MPEG_AUDIO_ENCODING:
 744                 return v4l2_ctrl_query_fill(
 745                         qc, V4L2_MPEG_AUDIO_ENCODING_AAC,
 746                         ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3
 747                         : V4L2_MPEG_AUDIO_ENCODING_AAC,
 748                         1, V4L2_MPEG_AUDIO_ENCODING_AAC);
 749         case V4L2_CID_MPEG_VIDEO_ENCODING:
 750                 return v4l2_ctrl_query_fill(
 751                         qc, V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC,
 752                         V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC, 1,
 753                         V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC);
 754
 755 /*      case V4L2_CID_MPEG_VIDEO_? maybe keyframe interval: */
 756 /*              return v4l2_ctrl_query_fill(qc, 0, 128, 128, 0); */
 757         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 758                 return v4l2_ctrl_query_fill(
 759                         qc, V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
 760                         V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1,
 761                         V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);
 762
 763         case V4L2_CID_MPEG_VIDEO_BITRATE:
 764                 return v4l2_ctrl_query_fill(qc, 1000000, 13500000, 100000,
 765                                             6500000);
 766         case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 767                 err = v4l2_ctrl_query_fill(qc, 1100000, 20200000, 100000,
 768                                            9000000);
 769                 if (!err && opt->bitrate_mode == HDPVR_CONSTANT)
 770                         qc->flags |= V4L2_CTRL_FLAG_INACTIVE;
 771                 return err;
 772         default:
 773                 return -EINVAL;
 774         }
 775 }
 776
 777 static int vidioc_queryctrl(struct file *file, void *private_data,
 778                             struct v4l2_queryctrl *qc)
 779 {
 780         struct hdpvr_fh *fh = file->private_data;
 781         struct hdpvr_device *dev = fh->dev;
 782         int i, next;
 783         u32 id = qc->id;
 784
 785         memset(qc, 0, sizeof(*qc));
 786
 787         next = !!(id &  V4L2_CTRL_FLAG_NEXT_CTRL);
 788         qc->id = id & ~V4L2_CTRL_FLAG_NEXT_CTRL;
 789
 790         for (i = 0; i < ARRAY_SIZE(supported_v4l2_ctrls); i++) {
 791                 if (next) {
 792                         if (qc->id < supported_v4l2_ctrls[i])
 793                                 qc->id = supported_v4l2_ctrls[i];
 794                         else
 795                                 continue;
 796                 }
 797
 798                 if (qc->id == supported_v4l2_ctrls[i])
 799                         return fill_queryctrl(&dev->options, qc,
 800                                               dev->flags & HDPVR_FLAG_AC3_CAP);
 801
 802                 if (qc->id < supported_v4l2_ctrls[i])
 803                         break;
 804         }
 805
 806         return -EINVAL;
 807 }
 808
 809 static int vidioc_g_ctrl(struct file *file, void *private_data,
 810                          struct v4l2_control *ctrl)
 811 {
 812         struct hdpvr_fh *fh = file->private_data;
 813         struct hdpvr_device *dev = fh->dev;
 814
 815         switch (ctrl->id) {
 816         case V4L2_CID_BRIGHTNESS:
 817                 ctrl->value = dev->options.brightness;
 818                 break;
 819         case V4L2_CID_CONTRAST:
 820                 ctrl->value = dev->options.contrast;
 821                 break;
 822         case V4L2_CID_SATURATION:
 823                 ctrl->value = dev->options.saturation;
 824                 break;
 825         case V4L2_CID_HUE:
 826                 ctrl->value = dev->options.hue;
 827                 break;
 828         case V4L2_CID_SHARPNESS:
 829                 ctrl->value = dev->options.sharpness;
 830                 break;
 831         default:
 832                 return -EINVAL;
 833         }
 834         return 0;
 835 }
 836
 837 static int vidioc_s_ctrl(struct file *file, void *private_data,
 838                          struct v4l2_control *ctrl)
 839 {
 840         struct hdpvr_fh *fh = file->private_data;
 841         struct hdpvr_device *dev = fh->dev;
 842         int retval;
 843
 844         switch (ctrl->id) {
 845         case V4L2_CID_BRIGHTNESS:
 846                 retval = hdpvr_config_call(dev, CTRL_BRIGHTNESS, ctrl->value);
 847                 if (!retval)
 848                         dev->options.brightness = ctrl->value;
 849                 break;
 850         case V4L2_CID_CONTRAST:
 851                 retval = hdpvr_config_call(dev, CTRL_CONTRAST, ctrl->value);
 852                 if (!retval)
 853                         dev->options.contrast = ctrl->value;
 854                 break;
 855         case V4L2_CID_SATURATION:
 856                 retval = hdpvr_config_call(dev, CTRL_SATURATION, ctrl->value);
 857                 if (!retval)
 858                         dev->options.saturation = ctrl->value;
 859                 break;
 860         case V4L2_CID_HUE:
 861                 retval = hdpvr_config_call(dev, CTRL_HUE, ctrl->value);
 862                 if (!retval)
 863                         dev->options.hue = ctrl->value;
 864                 break;
 865         case V4L2_CID_SHARPNESS:
 866                 retval = hdpvr_config_call(dev, CTRL_SHARPNESS, ctrl->value);
 867                 if (!retval)
 868                         dev->options.sharpness = ctrl->value;
 869                 break;
 870         default:
 871                 return -EINVAL;
 872         }
 873
 874         return retval;
 875 }
 876
 877
 878 static int hdpvr_get_ctrl(struct hdpvr_options *opt,
 879                           struct v4l2_ext_control *ctrl)
 880 {
 881         switch (ctrl->id) {
 882         case V4L2_CID_MPEG_AUDIO_ENCODING:
 883                 ctrl->value = opt->audio_codec;
 884                 break;
 885         case V4L2_CID_MPEG_VIDEO_ENCODING:
 886                 ctrl->value = V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC;
 887                 break;
 888 /*      case V4L2_CID_MPEG_VIDEO_B_FRAMES: */
 889 /*              ctrl->value = (opt->gop_mode & 0x2) ? 0 : 128; */
 890 /*              break; */
 891         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 892                 ctrl->value = opt->bitrate_mode == HDPVR_CONSTANT
 893                         ? V4L2_MPEG_VIDEO_BITRATE_MODE_CBR
 894                         : V4L2_MPEG_VIDEO_BITRATE_MODE_VBR;
 895                 break;
 896         case V4L2_CID_MPEG_VIDEO_BITRATE:
 897                 ctrl->value = opt->bitrate * 100000;
 898                 break;
 899         case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 900                 ctrl->value = opt->peak_bitrate * 100000;
 901                 break;
 902         case V4L2_CID_MPEG_STREAM_TYPE:
 903                 ctrl->value = V4L2_MPEG_STREAM_TYPE_MPEG2_TS;
 904                 break;
 905         default:
 906                 return -EINVAL;
 907         }
 908         return 0;
 909 }
 910
 911 static int vidioc_g_ext_ctrls(struct file *file, void *priv,
 912                               struct v4l2_ext_controls *ctrls)
 913 {
 914         struct hdpvr_fh *fh = file->private_data;
 915         struct hdpvr_device *dev = fh->dev;
 916         int i, err = 0;
 917
 918         if (ctrls->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
 919                 for (i = 0; i < ctrls->count; i++) {
 920                         struct v4l2_ext_control *ctrl = ctrls->controls + i;
 921
 922                         err = hdpvr_get_ctrl(&dev->options, ctrl);
 923                         if (err) {
 924                                 ctrls->error_idx = i;
 925                                 break;
 926                         }
 927                 }
 928                 return err;
 929
 930         }
 931
 932         return -EINVAL;
 933 }
 934
 935
 936 static int hdpvr_try_ctrl(struct v4l2_ext_control *ctrl, int ac3)
 937 {
 938         int ret = -EINVAL;
 939
 940         switch (ctrl->id) {
 941         case V4L2_CID_MPEG_AUDIO_ENCODING:
 942                 if (ctrl->value == V4L2_MPEG_AUDIO_ENCODING_AAC ||
 943                     (ac3 && ctrl->value == V4L2_MPEG_AUDIO_ENCODING_AC3))
 944                         ret = 0;
 945                 break;
 946         case V4L2_CID_MPEG_VIDEO_ENCODING:
 947                 if (ctrl->value == V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC)
 948                         ret = 0;
 949                 break;
 950 /*      case V4L2_CID_MPEG_VIDEO_B_FRAMES: */
 951 /*              if (ctrl->value == 0 || ctrl->value == 128) */
 952 /*                      ret = 0; */
 953 /*              break; */
 954         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 955                 if (ctrl->value == V4L2_MPEG_VIDEO_BITRATE_MODE_CBR ||
 956                     ctrl->value == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR)
 957                         ret = 0;
 958                 break;
 959         case V4L2_CID_MPEG_VIDEO_BITRATE:
 960         {
 961                 uint bitrate = ctrl->value / 100000;
 962                 if (bitrate >= 10 && bitrate <= 135)
 963                         ret = 0;
 964                 break;
 965         }
 966         case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 967         {
 968                 uint peak_bitrate = ctrl->value / 100000;
 969                 if (peak_bitrate >= 10 && peak_bitrate <= 202)
 970                         ret = 0;
 971                 break;
 972         }
 973         case V4L2_CID_MPEG_STREAM_TYPE:
 974                 if (ctrl->value == V4L2_MPEG_STREAM_TYPE_MPEG2_TS)
 975                         ret = 0;
 976                 break;
 977         default:
 978                 return -EINVAL;
 979         }
 980         return 0;
 981 }
 982
 983 static int vidioc_try_ext_ctrls(struct file *file, void *priv,
 984                                 struct v4l2_ext_controls *ctrls)
 985 {
 986         struct hdpvr_fh *fh = file->private_data;
 987         struct hdpvr_device *dev = fh->dev;
 988         int i, err = 0;
 989
 990         if (ctrls->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
 991                 for (i = 0; i < ctrls->count; i++) {
 992                         struct v4l2_ext_control *ctrl = ctrls->controls + i;
 993
 994                         err = hdpvr_try_ctrl(ctrl,
 995                                              dev->flags & HDPVR_FLAG_AC3_CAP);
 996                         if (err) {
 997                                 ctrls->error_idx = i;
 998                                 break;
 999                         }
1000                 }
1001                 return err;
1002         }
1003
1004         return -EINVAL;
1005 }
1006
1007
1008 static int hdpvr_set_ctrl(struct hdpvr_device *dev,
1009                           struct v4l2_ext_control *ctrl)
1010 {
1011         struct hdpvr_options *opt = &dev->options;
1012         int ret = 0;
1013
1014         switch (ctrl->id) {
1015         case V4L2_CID_MPEG_AUDIO_ENCODING:
1016                 if (dev->flags & HDPVR_FLAG_AC3_CAP) {
1017                         opt->audio_codec = ctrl->value;
1018                         ret = hdpvr_set_audio(dev, opt->audio_input,
1019                                               opt->audio_codec);
1020                 }
1021                 break;
1022         case V4L2_CID_MPEG_VIDEO_ENCODING:
1023                 break;
1024 /*      case V4L2_CID_MPEG_VIDEO_B_FRAMES: */
1025 /*              if (ctrl->value == 0 && !(opt->gop_mode & 0x2)) { */
1026 /*                      opt->gop_mode |= 0x2; */
1027 /*                      hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, */
1028 /*                                        opt->gop_mode); */
1029 /*              } */
1030 /*              if (ctrl->value == 128 && opt->gop_mode & 0x2) { */
1031 /*                      opt->gop_mode &= ~0x2; */
1032 /*                      hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, */
1033 /*                                        opt->gop_mode); */
1034 /*              } */
1035 /*              break; */
1036         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1037                 if (ctrl->value == V4L2_MPEG_VIDEO_BITRATE_MODE_CBR &&
1038                     opt->bitrate_mode != HDPVR_CONSTANT) {
1039                         opt->bitrate_mode = HDPVR_CONSTANT;
1040                         hdpvr_config_call(dev, CTRL_BITRATE_MODE_VALUE,
1041                                           opt->bitrate_mode);
1042                 }
1043                 if (ctrl->value == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR &&
1044                     opt->bitrate_mode == HDPVR_CONSTANT) {
1045                         opt->bitrate_mode = HDPVR_VARIABLE_AVERAGE;
1046                         hdpvr_config_call(dev, CTRL_BITRATE_MODE_VALUE,
1047                                           opt->bitrate_mode);
1048                 }
1049                 break;
1050         case V4L2_CID_MPEG_VIDEO_BITRATE: {
1051                 uint bitrate = ctrl->value / 100000;
1052
1053                 opt->bitrate = bitrate;
1054                 if (bitrate >= opt->peak_bitrate)
1055                         opt->peak_bitrate = bitrate+1;
1056
1057                 hdpvr_set_bitrate(dev);
1058                 break;
1059         }
1060         case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: {
1061                 uint peak_bitrate = ctrl->value / 100000;
1062
1063                 if (opt->bitrate_mode == HDPVR_CONSTANT)
1064                         break;
1065
1066                 if (opt->bitrate < peak_bitrate) {
1067                         opt->peak_bitrate = peak_bitrate;
1068                         hdpvr_set_bitrate(dev);
1069                 } else
1070                         ret = -EINVAL;
1071                 break;
1072         }
1073         case V4L2_CID_MPEG_STREAM_TYPE:
1074                 break;
1075         default:
1076                 return -EINVAL;
1077         }
1078         return ret;
1079 }
1080
1081 static int vidioc_s_ext_ctrls(struct file *file, void *priv,
1082                               struct v4l2_ext_controls *ctrls)
1083 {
1084         struct hdpvr_fh *fh = file->private_data;
1085         struct hdpvr_device *dev = fh->dev;
1086         int i, err = 0;
1087
1088         if (ctrls->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
1089                 for (i = 0; i < ctrls->count; i++) {
1090                         struct v4l2_ext_control *ctrl = ctrls->controls + i;
1091
1092                         err = hdpvr_try_ctrl(ctrl,
1093                                              dev->flags & HDPVR_FLAG_AC3_CAP);
1094                         if (err) {
1095                                 ctrls->error_idx = i;
1096                                 break;
1097                         }
1098                         err = hdpvr_set_ctrl(dev, ctrl);
1099                         if (err) {
1100                                 ctrls->error_idx = i;
1101                                 break;
1102                         }
1103                 }
1104                 return err;
1105
1106         }
1107
1108         return -EINVAL;
1109 }
1110
1111 static int vidioc_enum_fmt_vid_cap(struct file *file, void *private_data,
1112                                     struct v4l2_fmtdesc *f)
1113 {
1114
1115         if (f->index != 0 || f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1116                 return -EINVAL;
1117
1118         f->flags = V4L2_FMT_FLAG_COMPRESSED;
1119         strncpy(f->description, "MPEG2-TS with AVC/AAC streams", 32);
1120         f->pixelformat = V4L2_PIX_FMT_MPEG;
1121
1122         return 0;
1123 }
1124
1125 static int vidioc_g_fmt_vid_cap(struct file *file, void *private_data,
1126                                 struct v4l2_format *f)
1127 {
1128         struct hdpvr_fh *fh = file->private_data;
1129         struct hdpvr_device *dev = fh->dev;
1130         struct hdpvr_video_info *vid_info;
1131
1132         if (!dev)
1133                 return -ENODEV;
1134
1135         vid_info = get_video_info(dev);
1136         if (!vid_info)
1137                 return -EFAULT;
1138
1139         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1140         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
1141         f->fmt.pix.width        = vid_info->width;
1142         f->fmt.pix.height       = vid_info->height;
1143         f->fmt.pix.sizeimage    = dev->bulk_in_size;
1144         f->fmt.pix.colorspace   = 0;
1145         f->fmt.pix.bytesperline = 0;
1146         f->fmt.pix.field        = V4L2_FIELD_ANY;
1147
1148         kfree(vid_info);
1149         return 0;
1150 }
1151
1152 static int vidioc_encoder_cmd(struct file *filp, void *priv,
1153                                struct v4l2_encoder_cmd *a)
1154 {
1155         struct hdpvr_fh *fh = filp->private_data;
1156         struct hdpvr_device *dev = fh->dev;
1157         int res;
1158
1159         mutex_lock(&dev->io_mutex);
1160
1161         memset(&a->raw, 0, sizeof(a->raw));
1162         switch (a->cmd) {
1163         case V4L2_ENC_CMD_START:
1164                 a->flags = 0;
1165                 res = hdpvr_start_streaming(dev);
1166                 break;
1167         case V4L2_ENC_CMD_STOP:
1168                 res = hdpvr_stop_streaming(dev);
1169                 break;
1170         default:
1171                 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
1172                          "Unsupported encoder cmd %d\n", a->cmd);
1173                 res = -EINVAL;
1174         }
1175         mutex_unlock(&dev->io_mutex);
1176         return res;
1177 }
1178
1179 static int vidioc_try_encoder_cmd(struct file *filp, void *priv,
1180                                         struct v4l2_encoder_cmd *a)
1181 {
1182         switch (a->cmd) {
1183         case V4L2_ENC_CMD_START:
1184         case V4L2_ENC_CMD_STOP:
1185                 return 0;
1186         default:
1187                 return -EINVAL;
1188         }
1189 }
1190
1191 static const struct v4l2_ioctl_ops hdpvr_ioctl_ops = {
1192         .vidioc_querycap        = vidioc_querycap,
1193         .vidioc_s_std           = vidioc_s_std,
1194         .vidioc_enum_input      = vidioc_enum_input,
1195         .vidioc_g_input         = vidioc_g_input,
1196         .vidioc_s_input         = vidioc_s_input,
1197         .vidioc_enumaudio       = vidioc_enumaudio,
1198         .vidioc_g_audio         = vidioc_g_audio,
1199         .vidioc_s_audio         = vidioc_s_audio,
1200         .vidioc_queryctrl       = vidioc_queryctrl,
1201         .vidioc_g_ctrl          = vidioc_g_ctrl,
1202         .vidioc_s_ctrl          = vidioc_s_ctrl,
1203         .vidioc_g_ext_ctrls     = vidioc_g_ext_ctrls,
1204         .vidioc_s_ext_ctrls     = vidioc_s_ext_ctrls,
1205         .vidioc_try_ext_ctrls   = vidioc_try_ext_ctrls,
1206         .vidioc_enum_fmt_vid_cap        = vidioc_enum_fmt_vid_cap,
1207         .vidioc_g_fmt_vid_cap           = vidioc_g_fmt_vid_cap,
1208         .vidioc_encoder_cmd     = vidioc_encoder_cmd,
1209         .vidioc_try_encoder_cmd = vidioc_try_encoder_cmd,
1210 };
1211
1212 static void hdpvr_device_release(struct video_device *vdev)
1213 {
1214         struct hdpvr_device *dev = video_get_drvdata(vdev);
1215
1216         hdpvr_delete(dev);
1217 }
1218
1219 static const struct video_device hdpvr_video_template = {
1220 /*      .type                   = VFL_TYPE_GRABBER, */
1221 /*      .type2                  = VID_TYPE_CAPTURE | VID_TYPE_MPEG_ENCODER, */
1222         .fops                   = &hdpvr_fops,
1223         .release                = hdpvr_device_release,
1224         .ioctl_ops              = &hdpvr_ioctl_ops,
1225         .tvnorms                =
1226                 V4L2_STD_NTSC  | V4L2_STD_SECAM | V4L2_STD_PAL_B |
1227                 V4L2_STD_PAL_G | V4L2_STD_PAL_H | V4L2_STD_PAL_I |
1228                 V4L2_STD_PAL_D | V4L2_STD_PAL_M | V4L2_STD_PAL_N |
1229                 V4L2_STD_PAL_60,
1230         .current_norm           = V4L2_STD_NTSC | V4L2_STD_PAL_M |
1231                 V4L2_STD_PAL_60,
1232 };
1233
1234 int hdpvr_register_videodev(struct hdpvr_device *dev, struct device *parent,
1235                             int devnum)
1236 {
1237         /* setup and register video device */
1238         dev->video_dev = video_device_alloc();
1239         if (!dev->video_dev) {
1240                 v4l2_err(&dev->v4l2_dev, "video_device_alloc() failed\n");
1241                 goto error;
1242         }
1243
1244         *(dev->video_dev) = hdpvr_video_template;
1245         strcpy(dev->video_dev->name, "Hauppauge HD PVR");
1246         dev->video_dev->parent = parent;
1247         video_set_drvdata(dev->video_dev, dev);
1248
1249         if (video_register_device(dev->video_dev, VFL_TYPE_GRABBER, devnum)) {
1250                 v4l2_err(&dev->v4l2_dev, "video_device registration failed\n");
1251                 goto error;
1252         }
1253
1254         return 0;
1255 error:
1256         return -ENOMEM;
1257 }