drivers/media/video/em28xx/em28xx-video.c

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
   3                     video capture devices
   4
   5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   6                       Markus Rechberger <mrechberger@gmail.com>
   7                       Mauro Carvalho Chehab <mchehab@infradead.org>
   8                       Sascha Sommer <saschasommer@freenet.de>
   9
  10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  11                 by Luca Risolia <luca.risolia@studio.unibo.it>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/bitmap.h>
  33 #include <linux/usb.h>
  34 #include <linux/i2c.h>
  35 #include <linux/version.h>
  36 #include <linux/mm.h>
  37 #include <linux/mutex.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/v4l2-chip-ident.h>
  43 #include <media/msp3400.h>
  44 #include <media/tuner.h>
  45
  46 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  47                       "Markus Rechberger <mrechberger@gmail.com>, " \
  48                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  49                       "Sascha Sommer <saschasommer@freenet.de>"
  50
  51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  52 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 1)
  53
  54 #define em28xx_videodbg(fmt, arg...) do {\
  55         if (video_debug) \
  56                 printk(KERN_INFO "%s %s :"fmt, \
  57                          dev->name, __func__ , ##arg); } while (0)
  58
  59 static unsigned int isoc_debug;
  60 module_param(isoc_debug, int, 0644);
  61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  62
  63 #define em28xx_isocdbg(fmt, arg...) \
  64 do {\
  65         if (isoc_debug) { \
  66                 printk(KERN_INFO "%s %s :"fmt, \
  67                          dev->name, __func__ , ##arg); \
  68         } \
  69   } while (0)
  70
  71 MODULE_AUTHOR(DRIVER_AUTHOR);
  72 MODULE_DESCRIPTION(DRIVER_DESC);
  73 MODULE_LICENSE("GPL");
  74
  75 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  76 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  77 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78
  79 module_param_array(video_nr, int, NULL, 0444);
  80 module_param_array(vbi_nr, int, NULL, 0444);
  81 module_param_array(radio_nr, int, NULL, 0444);
  82 MODULE_PARM_DESC(video_nr, "video device numbers");
  83 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  84 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  85
  86 static unsigned int video_debug;
  87 module_param(video_debug, int, 0644);
  88 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  89
  90 /* supported video standards */
  91 static struct em28xx_fmt format[] = {
  92         {
  93                 .name     = "16bpp YUY2, 4:2:2, packed",
  94                 .fourcc   = V4L2_PIX_FMT_YUYV,
  95                 .depth    = 16,
  96                 .reg      = EM28XX_OUTFMT_YUV422_Y0UY1V,
  97         },
  98 };
  99
 100 /* supported controls */
 101 /* Common to all boards */
 102 static struct v4l2_queryctrl em28xx_qctrl[] = {
 103         {
 104                 .id = V4L2_CID_AUDIO_VOLUME,
 105                 .type = V4L2_CTRL_TYPE_INTEGER,
 106                 .name = "Volume",
 107                 .minimum = 0x0,
 108                 .maximum = 0x1f,
 109                 .step = 0x1,
 110                 .default_value = 0x1f,
 111                 .flags = 0,
 112         }, {
 113                 .id = V4L2_CID_AUDIO_MUTE,
 114                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 115                 .name = "Mute",
 116                 .minimum = 0,
 117                 .maximum = 1,
 118                 .step = 1,
 119                 .default_value = 1,
 120                 .flags = 0,
 121         }
 122 };
 123
 124 /* ------------------------------------------------------------------
 125         DMA and thread functions
 126    ------------------------------------------------------------------*/
 127
 128 /*
 129  * Announces that a buffer were filled and request the next
 130  */
 131 static inline void buffer_filled(struct em28xx *dev,
 132                                   struct em28xx_dmaqueue *dma_q,
 133                                   struct em28xx_buffer *buf)
 134 {
 135         /* Advice that buffer was filled */
 136         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 137         buf->vb.state = VIDEOBUF_DONE;
 138         buf->vb.field_count++;
 139         do_gettimeofday(&buf->vb.ts);
 140
 141         dev->isoc_ctl.buf = NULL;
 142
 143         list_del(&buf->vb.queue);
 144         wake_up(&buf->vb.done);
 145 }
 146
 147 /*
 148  * Identify the buffer header type and properly handles
 149  */
 150 static void em28xx_copy_video(struct em28xx *dev,
 151                               struct em28xx_dmaqueue  *dma_q,
 152                               struct em28xx_buffer *buf,
 153                               unsigned char *p,
 154                               unsigned char *outp, unsigned long len)
 155 {
 156         void *fieldstart, *startwrite, *startread;
 157         int  linesdone, currlinedone, offset, lencopy, remain;
 158         int bytesperline = dev->width << 1;
 159
 160         if (dma_q->pos + len > buf->vb.size)
 161                 len = buf->vb.size - dma_q->pos;
 162
 163         if (p[0] != 0x88 && p[0] != 0x22) {
 164                 em28xx_isocdbg("frame is not complete\n");
 165                 len += 4;
 166         } else
 167                 p += 4;
 168
 169         startread = p;
 170         remain = len;
 171
 172         /* Interlaces frame */
 173         if (buf->top_field)
 174                 fieldstart = outp;
 175         else
 176                 fieldstart = outp + bytesperline;
 177
 178         linesdone = dma_q->pos / bytesperline;
 179         currlinedone = dma_q->pos % bytesperline;
 180         offset = linesdone * bytesperline * 2 + currlinedone;
 181         startwrite = fieldstart + offset;
 182         lencopy = bytesperline - currlinedone;
 183         lencopy = lencopy > remain ? remain : lencopy;
 184
 185         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 186                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 187                                ((char *)startwrite + lencopy) -
 188                                ((char *)outp + buf->vb.size));
 189                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
 190                 lencopy = remain;
 191         }
 192         if (lencopy <= 0)
 193                 return;
 194         memcpy(startwrite, startread, lencopy);
 195
 196         remain -= lencopy;
 197
 198         while (remain > 0) {
 199                 startwrite += lencopy + bytesperline;
 200                 startread += lencopy;
 201                 if (bytesperline > remain)
 202                         lencopy = remain;
 203                 else
 204                         lencopy = bytesperline;
 205
 206                 if ((char *)startwrite + lencopy > (char *)outp +
 207                     buf->vb.size) {
 208                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 209                                        ((char *)startwrite + lencopy) -
 210                                        ((char *)outp + buf->vb.size));
 211                         lencopy = remain = (char *)outp + buf->vb.size -
 212                                            (char *)startwrite;
 213                 }
 214                 if (lencopy <= 0)
 215                         break;
 216
 217                 memcpy(startwrite, startread, lencopy);
 218
 219                 remain -= lencopy;
 220         }
 221
 222         dma_q->pos += len;
 223 }
 224
 225 static inline void print_err_status(struct em28xx *dev,
 226                                      int packet, int status)
 227 {
 228         char *errmsg = "Unknown";
 229
 230         switch (status) {
 231         case -ENOENT:
 232                 errmsg = "unlinked synchronuously";
 233                 break;
 234         case -ECONNRESET:
 235                 errmsg = "unlinked asynchronuously";
 236                 break;
 237         case -ENOSR:
 238                 errmsg = "Buffer error (overrun)";
 239                 break;
 240         case -EPIPE:
 241                 errmsg = "Stalled (device not responding)";
 242                 break;
 243         case -EOVERFLOW:
 244                 errmsg = "Babble (bad cable?)";
 245                 break;
 246         case -EPROTO:
 247                 errmsg = "Bit-stuff error (bad cable?)";
 248                 break;
 249         case -EILSEQ:
 250                 errmsg = "CRC/Timeout (could be anything)";
 251                 break;
 252         case -ETIME:
 253                 errmsg = "Device does not respond";
 254                 break;
 255         }
 256         if (packet < 0) {
 257                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 258         } else {
 259                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 260                                packet, status, errmsg);
 261         }
 262 }
 263
 264 /*
 265  * video-buf generic routine to get the next available buffer
 266  */
 267 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 268                                           struct em28xx_buffer **buf)
 269 {
 270         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 271         char *outp;
 272
 273         if (list_empty(&dma_q->active)) {
 274                 em28xx_isocdbg("No active queue to serve\n");
 275                 dev->isoc_ctl.buf = NULL;
 276                 *buf = NULL;
 277                 return;
 278         }
 279
 280         /* Get the next buffer */
 281         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 282
 283         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 284         outp = videobuf_to_vmalloc(&(*buf)->vb);
 285         memset(outp, 0, (*buf)->vb.size);
 286
 287         dev->isoc_ctl.buf = *buf;
 288
 289         return;
 290 }
 291
 292 /*
 293  * Controls the isoc copy of each urb packet
 294  */
 295 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 296 {
 297         struct em28xx_buffer    *buf;
 298         struct em28xx_dmaqueue  *dma_q = urb->context;
 299         unsigned char *outp = NULL;
 300         int i, len = 0, rc = 1;
 301         unsigned char *p;
 302
 303         if (!dev)
 304                 return 0;
 305
 306         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 307                 return 0;
 308
 309         if (urb->status < 0) {
 310                 print_err_status(dev, -1, urb->status);
 311                 if (urb->status == -ENOENT)
 312                         return 0;
 313         }
 314
 315         buf = dev->isoc_ctl.buf;
 316         if (buf != NULL)
 317                 outp = videobuf_to_vmalloc(&buf->vb);
 318
 319         for (i = 0; i < urb->number_of_packets; i++) {
 320                 int status = urb->iso_frame_desc[i].status;
 321
 322                 if (status < 0) {
 323                         print_err_status(dev, i, status);
 324                         if (urb->iso_frame_desc[i].status != -EPROTO)
 325                                 continue;
 326                 }
 327
 328                 len = urb->iso_frame_desc[i].actual_length - 4;
 329
 330                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 331                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 332                         continue;
 333                 }
 334                 if (urb->iso_frame_desc[i].actual_length >
 335                                                 dev->max_pkt_size) {
 336                         em28xx_isocdbg("packet bigger than packet size");
 337                         continue;
 338                 }
 339
 340                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 341
 342                 /* FIXME: incomplete buffer checks where removed to make
 343                    logic simpler. Impacts of those changes should be evaluated
 344                  */
 345                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 346                         em28xx_isocdbg("VBI HEADER!!!\n");
 347                         /* FIXME: Should add vbi copy */
 348                         continue;
 349                 }
 350                 if (p[0] == 0x22 && p[1] == 0x5a) {
 351                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 352                                        len, (p[2] & 1) ? "odd" : "even");
 353
 354                         if (!(p[2] & 1)) {
 355                                 if (buf != NULL)
 356                                         buffer_filled(dev, dma_q, buf);
 357                                 get_next_buf(dma_q, &buf);
 358                                 if (buf == NULL)
 359                                         outp = NULL;
 360                                 else
 361                                         outp = videobuf_to_vmalloc(&buf->vb);
 362                         }
 363
 364                         if (buf != NULL) {
 365                                 if (p[2] & 1)
 366                                         buf->top_field = 0;
 367                                 else
 368                                         buf->top_field = 1;
 369                         }
 370
 371                         dma_q->pos = 0;
 372                 }
 373                 if (buf != NULL)
 374                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 375         }
 376         return rc;
 377 }
 378
 379 /* ------------------------------------------------------------------
 380         Videobuf operations
 381    ------------------------------------------------------------------*/
 382
 383 static int
 384 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 385 {
 386         struct em28xx_fh *fh = vq->priv_data;
 387         struct em28xx        *dev = fh->dev;
 388         struct v4l2_frequency f;
 389
 390         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
 391
 392         if (0 == *count)
 393                 *count = EM28XX_DEF_BUF;
 394
 395         if (*count < EM28XX_MIN_BUF)
 396                 *count = EM28XX_MIN_BUF;
 397
 398         /* Ask tuner to go to analog or radio mode */
 399         memset(&f, 0, sizeof(f));
 400         f.frequency = dev->ctl_freq;
 401         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 402
 403         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 404
 405         return 0;
 406 }
 407
 408 /* This is called *without* dev->slock held; please keep it that way */
 409 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 410 {
 411         struct em28xx_fh     *fh  = vq->priv_data;
 412         struct em28xx        *dev = fh->dev;
 413         unsigned long flags = 0;
 414         if (in_interrupt())
 415                 BUG();
 416
 417         /* We used to wait for the buffer to finish here, but this didn't work
 418            because, as we were keeping the state as VIDEOBUF_QUEUED,
 419            videobuf_queue_cancel marked it as finished for us.
 420            (Also, it could wedge forever if the hardware was misconfigured.)
 421
 422            This should be safe; by the time we get here, the buffer isn't
 423            queued anymore. If we ever start marking the buffers as
 424            VIDEOBUF_ACTIVE, it won't be, though.
 425         */
 426         spin_lock_irqsave(&dev->slock, flags);
 427         if (dev->isoc_ctl.buf == buf)
 428                 dev->isoc_ctl.buf = NULL;
 429         spin_unlock_irqrestore(&dev->slock, flags);
 430
 431         videobuf_vmalloc_free(&buf->vb);
 432         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 433 }
 434
 435 static int
 436 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 437                                                 enum v4l2_field field)
 438 {
 439         struct em28xx_fh     *fh  = vq->priv_data;
 440         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 441         struct em28xx        *dev = fh->dev;
 442         int                  rc = 0, urb_init = 0;
 443
 444         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
 445
 446         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 447                 return -EINVAL;
 448
 449         buf->vb.width  = dev->width;
 450         buf->vb.height = dev->height;
 451         buf->vb.field  = field;
 452
 453         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 454                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 455                 if (rc < 0)
 456                         goto fail;
 457         }
 458
 459         if (!dev->isoc_ctl.num_bufs)
 460                 urb_init = 1;
 461
 462         if (urb_init) {
 463                 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 464                                       EM28XX_NUM_BUFS, dev->max_pkt_size,
 465                                       em28xx_isoc_copy);
 466                 if (rc < 0)
 467                         goto fail;
 468         }
 469
 470         buf->vb.state = VIDEOBUF_PREPARED;
 471         return 0;
 472
 473 fail:
 474         free_buffer(vq, buf);
 475         return rc;
 476 }
 477
 478 static void
 479 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 480 {
 481         struct em28xx_buffer    *buf     = container_of(vb,
 482                                                         struct em28xx_buffer,
 483                                                         vb);
 484         struct em28xx_fh        *fh      = vq->priv_data;
 485         struct em28xx           *dev     = fh->dev;
 486         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 487
 488         buf->vb.state = VIDEOBUF_QUEUED;
 489         list_add_tail(&buf->vb.queue, &vidq->active);
 490
 491 }
 492
 493 static void buffer_release(struct videobuf_queue *vq,
 494                                 struct videobuf_buffer *vb)
 495 {
 496         struct em28xx_buffer   *buf  = container_of(vb,
 497                                                     struct em28xx_buffer,
 498                                                     vb);
 499         struct em28xx_fh       *fh   = vq->priv_data;
 500         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 501
 502         em28xx_isocdbg("em28xx: called buffer_release\n");
 503
 504         free_buffer(vq, buf);
 505 }
 506
 507 static struct videobuf_queue_ops em28xx_video_qops = {
 508         .buf_setup      = buffer_setup,
 509         .buf_prepare    = buffer_prepare,
 510         .buf_queue      = buffer_queue,
 511         .buf_release    = buffer_release,
 512 };
 513
 514 /*********************  v4l2 interface  **************************************/
 515
 516 static void video_mux(struct em28xx *dev, int index)
 517 {
 518         struct v4l2_routing route;
 519
 520         route.input = INPUT(index)->vmux;
 521         route.output = 0;
 522         dev->ctl_input = index;
 523         dev->ctl_ainput = INPUT(index)->amux;
 524         dev->ctl_aoutput = INPUT(index)->aout;
 525
 526         if (!dev->ctl_aoutput)
 527                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 528
 529         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 530
 531         if (dev->board.has_msp34xx) {
 532                 if (dev->i2s_speed) {
 533                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 534                                 &dev->i2s_speed);
 535                 }
 536                 route.input = dev->ctl_ainput;
 537                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 538                 /* Note: this is msp3400 specific */
 539                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 540                         &route);
 541         }
 542
 543         if (dev->board.adecoder != EM28XX_NOADECODER) {
 544                 route.input = dev->ctl_ainput;
 545                 route.output = dev->ctl_aoutput;
 546                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 547                         &route);
 548         }
 549
 550         em28xx_audio_analog_set(dev);
 551 }
 552
 553 /* Usage lock check functions */
 554 static int res_get(struct em28xx_fh *fh)
 555 {
 556         struct em28xx    *dev = fh->dev;
 557         int              rc   = 0;
 558
 559         /* This instance already has stream_on */
 560         if (fh->stream_on)
 561                 return rc;
 562
 563         if (dev->stream_on)
 564                 return -EBUSY;
 565
 566         dev->stream_on = 1;
 567         fh->stream_on  = 1;
 568         return rc;
 569 }
 570
 571 static int res_check(struct em28xx_fh *fh)
 572 {
 573         return fh->stream_on;
 574 }
 575
 576 static void res_free(struct em28xx_fh *fh)
 577 {
 578         struct em28xx    *dev = fh->dev;
 579
 580         fh->stream_on = 0;
 581         dev->stream_on = 0;
 582 }
 583
 584 /*
 585  * em28xx_get_ctrl()
 586  * return the current saturation, brightness or contrast, mute state
 587  */
 588 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 589 {
 590         switch (ctrl->id) {
 591         case V4L2_CID_AUDIO_MUTE:
 592                 ctrl->value = dev->mute;
 593                 return 0;
 594         case V4L2_CID_AUDIO_VOLUME:
 595                 ctrl->value = dev->volume;
 596                 return 0;
 597         default:
 598                 return -EINVAL;
 599         }
 600 }
 601
 602 /*
 603  * em28xx_set_ctrl()
 604  * mute or set new saturation, brightness or contrast
 605  */
 606 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 607 {
 608         switch (ctrl->id) {
 609         case V4L2_CID_AUDIO_MUTE:
 610                 if (ctrl->value != dev->mute) {
 611                         dev->mute = ctrl->value;
 612                         return em28xx_audio_analog_set(dev);
 613                 }
 614                 return 0;
 615         case V4L2_CID_AUDIO_VOLUME:
 616                 dev->volume = ctrl->value;
 617                 return em28xx_audio_analog_set(dev);
 618         default:
 619                 return -EINVAL;
 620         }
 621 }
 622
 623 static int check_dev(struct em28xx *dev)
 624 {
 625         if (dev->state & DEV_DISCONNECTED) {
 626                 em28xx_errdev("v4l2 ioctl: device not present\n");
 627                 return -ENODEV;
 628         }
 629
 630         if (dev->state & DEV_MISCONFIGURED) {
 631                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 632                               "close and open it again\n");
 633                 return -EIO;
 634         }
 635         return 0;
 636 }
 637
 638 static void get_scale(struct em28xx *dev,
 639                         unsigned int width, unsigned int height,
 640                         unsigned int *hscale, unsigned int *vscale)
 641 {
 642         unsigned int          maxw   = norm_maxw(dev);
 643         unsigned int          maxh   = norm_maxh(dev);
 644
 645         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 646         if (*hscale >= 0x4000)
 647                 *hscale = 0x3fff;
 648
 649         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 650         if (*vscale >= 0x4000)
 651                 *vscale = 0x3fff;
 652 }
 653
 654 /* ------------------------------------------------------------------
 655         IOCTL vidioc handling
 656    ------------------------------------------------------------------*/
 657
 658 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 659                                         struct v4l2_format *f)
 660 {
 661         struct em28xx_fh      *fh  = priv;
 662         struct em28xx         *dev = fh->dev;
 663
 664         mutex_lock(&dev->lock);
 665
 666         f->fmt.pix.width = dev->width;
 667         f->fmt.pix.height = dev->height;
 668         f->fmt.pix.pixelformat = dev->format->fourcc;
 669         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
 670         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 671         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 672
 673         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 674         f->fmt.pix.field = dev->interlaced ?
 675                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 676
 677         mutex_unlock(&dev->lock);
 678         return 0;
 679 }
 680
 681 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
 682 {
 683         unsigned int i;
 684
 685         for (i = 0; i < ARRAY_SIZE(format); i++)
 686                 if (format[i].fourcc == fourcc)
 687                         return &format[i];
 688
 689         return NULL;
 690 }
 691
 692 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 693                         struct v4l2_format *f)
 694 {
 695         struct em28xx_fh      *fh    = priv;
 696         struct em28xx         *dev   = fh->dev;
 697         int                   width  = f->fmt.pix.width;
 698         int                   height = f->fmt.pix.height;
 699         unsigned int          maxw   = norm_maxw(dev);
 700         unsigned int          maxh   = norm_maxh(dev);
 701         unsigned int          hscale, vscale;
 702         struct em28xx_fmt     *fmt;
 703
 704         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 705         if (!fmt) {
 706                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
 707                                 f->fmt.pix.pixelformat);
 708                 return -EINVAL;
 709         }
 710
 711         /* width must even because of the YUYV format
 712            height must be even because of interlacing */
 713         height &= 0xfffe;
 714         width  &= 0xfffe;
 715
 716         if (unlikely(height < 32))
 717                 height = 32;
 718         if (unlikely(height > maxh))
 719                 height = maxh;
 720         if (unlikely(width < 48))
 721                 width = 48;
 722         if (unlikely(width > maxw))
 723                 width = maxw;
 724
 725         if (dev->board.is_em2800) {
 726                 /* the em2800 can only scale down to 50% */
 727                 if (height % (maxh / 2))
 728                         height = maxh;
 729                 if (width % (maxw / 2))
 730                         width = maxw;
 731                 /* according to empiatech support */
 732                 /* the MaxPacketSize is to small to support */
 733                 /* framesizes larger than 640x480 @ 30 fps */
 734                 /* or 640x576 @ 25 fps. As this would cut */
 735                 /* of a part of the image we prefer */
 736                 /* 360x576 or 360x480 for now */
 737                 if (width == maxw && height == maxh)
 738                         width /= 2;
 739         }
 740
 741         get_scale(dev, width, height, &hscale, &vscale);
 742
 743         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 744         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 745
 746         f->fmt.pix.width = width;
 747         f->fmt.pix.height = height;
 748         f->fmt.pix.pixelformat = fmt->fourcc;
 749         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
 750         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
 751         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 752         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 753
 754         return 0;
 755 }
 756
 757 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 758                         struct v4l2_format *f)
 759 {
 760         struct em28xx_fh      *fh  = priv;
 761         struct em28xx         *dev = fh->dev;
 762         int                   rc;
 763         struct em28xx_fmt     *fmt;
 764
 765         rc = check_dev(dev);
 766         if (rc < 0)
 767                 return rc;
 768
 769         mutex_lock(&dev->lock);
 770
 771         vidioc_try_fmt_vid_cap(file, priv, f);
 772
 773         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 774         if (!fmt) {
 775                 rc = -EINVAL;
 776                 goto out;
 777         }
 778
 779         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 780                 em28xx_errdev("%s queue busy\n", __func__);
 781                 rc = -EBUSY;
 782                 goto out;
 783         }
 784
 785         if (dev->stream_on && !fh->stream_on) {
 786                 em28xx_errdev("%s device in use by another fh\n", __func__);
 787                 rc = -EBUSY;
 788                 goto out;
 789         }
 790
 791         /* set new image size */
 792         dev->width = f->fmt.pix.width;
 793         dev->height = f->fmt.pix.height;
 794         dev->format = fmt;
 795         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 796
 797         em28xx_set_alternate(dev);
 798         em28xx_resolution_set(dev);
 799
 800         rc = 0;
 801
 802 out:
 803         mutex_unlock(&dev->lock);
 804         return rc;
 805 }
 806
 807 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
 808 {
 809         struct em28xx_fh   *fh  = priv;
 810         struct em28xx      *dev = fh->dev;
 811         struct v4l2_format f;
 812         int                rc;
 813
 814         rc = check_dev(dev);
 815         if (rc < 0)
 816                 return rc;
 817
 818         mutex_lock(&dev->lock);
 819         dev->norm = *norm;
 820
 821         /* Adjusts width/height, if needed */
 822         f.fmt.pix.width = dev->width;
 823         f.fmt.pix.height = dev->height;
 824         vidioc_try_fmt_vid_cap(file, priv, &f);
 825
 826         /* set new image size */
 827         dev->width = f.fmt.pix.width;
 828         dev->height = f.fmt.pix.height;
 829         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 830
 831         em28xx_resolution_set(dev);
 832         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 833
 834         mutex_unlock(&dev->lock);
 835         return 0;
 836 }
 837
 838 static const char *iname[] = {
 839         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 840         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 841         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 842         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 843         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 844         [EM28XX_VMUX_TELEVISION] = "Television",
 845         [EM28XX_VMUX_CABLE]      = "Cable TV",
 846         [EM28XX_VMUX_DVB]        = "DVB",
 847         [EM28XX_VMUX_DEBUG]      = "for debug only",
 848 };
 849
 850 static int vidioc_enum_input(struct file *file, void *priv,
 851                                 struct v4l2_input *i)
 852 {
 853         struct em28xx_fh   *fh  = priv;
 854         struct em28xx      *dev = fh->dev;
 855         unsigned int       n;
 856
 857         n = i->index;
 858         if (n >= MAX_EM28XX_INPUT)
 859                 return -EINVAL;
 860         if (0 == INPUT(n)->type)
 861                 return -EINVAL;
 862
 863         i->index = n;
 864         i->type = V4L2_INPUT_TYPE_CAMERA;
 865
 866         strcpy(i->name, iname[INPUT(n)->type]);
 867
 868         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 869                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 870                 i->type = V4L2_INPUT_TYPE_TUNER;
 871
 872         i->std = dev->vdev->tvnorms;
 873
 874         return 0;
 875 }
 876
 877 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 878 {
 879         struct em28xx_fh   *fh  = priv;
 880         struct em28xx      *dev = fh->dev;
 881
 882         *i = dev->ctl_input;
 883
 884         return 0;
 885 }
 886
 887 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 888 {
 889         struct em28xx_fh   *fh  = priv;
 890         struct em28xx      *dev = fh->dev;
 891         int                rc;
 892
 893         rc = check_dev(dev);
 894         if (rc < 0)
 895                 return rc;
 896
 897         if (i >= MAX_EM28XX_INPUT)
 898                 return -EINVAL;
 899         if (0 == INPUT(i)->type)
 900                 return -EINVAL;
 901
 902         dev->ctl_input = i;
 903
 904         mutex_lock(&dev->lock);
 905         video_mux(dev, dev->ctl_input);
 906         mutex_unlock(&dev->lock);
 907         return 0;
 908 }
 909
 910 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 911 {
 912         struct em28xx_fh   *fh    = priv;
 913         struct em28xx      *dev   = fh->dev;
 914
 915         switch (a->index) {
 916         case EM28XX_AMUX_VIDEO:
 917                 strcpy(a->name, "Television");
 918                 break;
 919         case EM28XX_AMUX_LINE_IN:
 920                 strcpy(a->name, "Line In");
 921                 break;
 922         case EM28XX_AMUX_VIDEO2:
 923                 strcpy(a->name, "Television alt");
 924                 break;
 925         case EM28XX_AMUX_PHONE:
 926                 strcpy(a->name, "Phone");
 927                 break;
 928         case EM28XX_AMUX_MIC:
 929                 strcpy(a->name, "Mic");
 930                 break;
 931         case EM28XX_AMUX_CD:
 932                 strcpy(a->name, "CD");
 933                 break;
 934         case EM28XX_AMUX_AUX:
 935                 strcpy(a->name, "Aux");
 936                 break;
 937         case EM28XX_AMUX_PCM_OUT:
 938                 strcpy(a->name, "PCM");
 939                 break;
 940         default:
 941                 return -EINVAL;
 942         }
 943
 944         a->index = dev->ctl_ainput;
 945         a->capability = V4L2_AUDCAP_STEREO;
 946
 947         return 0;
 948 }
 949
 950 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 951 {
 952         struct em28xx_fh   *fh  = priv;
 953         struct em28xx      *dev = fh->dev;
 954
 955
 956         if (a->index >= MAX_EM28XX_INPUT)
 957                 return -EINVAL;
 958         if (0 == INPUT(a->index)->type)
 959                 return -EINVAL;
 960
 961         mutex_lock(&dev->lock);
 962
 963         dev->ctl_ainput = INPUT(a->index)->amux;
 964         dev->ctl_aoutput = INPUT(a->index)->aout;
 965
 966         if (!dev->ctl_aoutput)
 967                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 968
 969         mutex_unlock(&dev->lock);
 970         return 0;
 971 }
 972
 973 static int vidioc_queryctrl(struct file *file, void *priv,
 974                                 struct v4l2_queryctrl *qc)
 975 {
 976         struct em28xx_fh      *fh  = priv;
 977         struct em28xx         *dev = fh->dev;
 978         int                   id  = qc->id;
 979         int                   i;
 980         int                   rc;
 981
 982         rc = check_dev(dev);
 983         if (rc < 0)
 984                 return rc;
 985
 986         memset(qc, 0, sizeof(*qc));
 987
 988         qc->id = id;
 989
 990         if (!dev->board.has_msp34xx) {
 991                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
 992                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
 993                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
 994                                 return 0;
 995                         }
 996                 }
 997         }
 998         mutex_lock(&dev->lock);
 999         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1000         mutex_unlock(&dev->lock);
1001
1002         if (qc->type)
1003                 return 0;
1004         else
1005                 return -EINVAL;
1006 }
1007
1008 static int vidioc_g_ctrl(struct file *file, void *priv,
1009                                 struct v4l2_control *ctrl)
1010 {
1011         struct em28xx_fh      *fh  = priv;
1012         struct em28xx         *dev = fh->dev;
1013         int                   rc;
1014
1015         rc = check_dev(dev);
1016         if (rc < 0)
1017                 return rc;
1018         rc = 0;
1019
1020         mutex_lock(&dev->lock);
1021
1022         if (dev->board.has_msp34xx)
1023                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1024         else {
1025                 rc = em28xx_get_ctrl(dev, ctrl);
1026                 if (rc < 0) {
1027                         em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1028                         rc = 0;
1029                 }
1030         }
1031
1032         mutex_unlock(&dev->lock);
1033         return rc;
1034 }
1035
1036 static int vidioc_s_ctrl(struct file *file, void *priv,
1037                                 struct v4l2_control *ctrl)
1038 {
1039         struct em28xx_fh      *fh  = priv;
1040         struct em28xx         *dev = fh->dev;
1041         u8                    i;
1042         int                   rc;
1043
1044         rc = check_dev(dev);
1045         if (rc < 0)
1046                 return rc;
1047
1048         mutex_lock(&dev->lock);
1049
1050         if (dev->board.has_msp34xx)
1051                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1052         else {
1053                 rc = 1;
1054                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1055                         if (ctrl->id == em28xx_qctrl[i].id) {
1056                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1057                                     ctrl->value > em28xx_qctrl[i].maximum) {
1058                                         rc = -ERANGE;
1059                                         break;
1060                                 }
1061
1062                                 rc = em28xx_set_ctrl(dev, ctrl);
1063                                 break;
1064                         }
1065                 }
1066         }
1067
1068         /* Control not found - try to send it to the attached devices */
1069         if (rc == 1) {
1070                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1071                 rc = 0;
1072         }
1073
1074         mutex_unlock(&dev->lock);
1075         return rc;
1076 }
1077
1078 static int vidioc_g_tuner(struct file *file, void *priv,
1079                                 struct v4l2_tuner *t)
1080 {
1081         struct em28xx_fh      *fh  = priv;
1082         struct em28xx         *dev = fh->dev;
1083         int                   rc;
1084
1085         rc = check_dev(dev);
1086         if (rc < 0)
1087                 return rc;
1088
1089         if (0 != t->index)
1090                 return -EINVAL;
1091
1092         strcpy(t->name, "Tuner");
1093
1094         mutex_lock(&dev->lock);
1095
1096         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1097
1098         mutex_unlock(&dev->lock);
1099         return 0;
1100 }
1101
1102 static int vidioc_s_tuner(struct file *file, void *priv,
1103                                 struct v4l2_tuner *t)
1104 {
1105         struct em28xx_fh      *fh  = priv;
1106         struct em28xx         *dev = fh->dev;
1107         int                   rc;
1108
1109         rc = check_dev(dev);
1110         if (rc < 0)
1111                 return rc;
1112
1113         if (0 != t->index)
1114                 return -EINVAL;
1115
1116         mutex_lock(&dev->lock);
1117
1118         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1119
1120         mutex_unlock(&dev->lock);
1121         return 0;
1122 }
1123
1124 static int vidioc_g_frequency(struct file *file, void *priv,
1125                                 struct v4l2_frequency *f)
1126 {
1127         struct em28xx_fh      *fh  = priv;
1128         struct em28xx         *dev = fh->dev;
1129
1130         mutex_lock(&dev->lock);
1131         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1132         f->frequency = dev->ctl_freq;
1133         mutex_unlock(&dev->lock);
1134
1135         return 0;
1136 }
1137
1138 static int vidioc_s_frequency(struct file *file, void *priv,
1139                                 struct v4l2_frequency *f)
1140 {
1141         struct em28xx_fh      *fh  = priv;
1142         struct em28xx         *dev = fh->dev;
1143         int                   rc;
1144
1145         rc = check_dev(dev);
1146         if (rc < 0)
1147                 return rc;
1148
1149         if (0 != f->tuner)
1150                 return -EINVAL;
1151
1152         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1153                 return -EINVAL;
1154         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1155                 return -EINVAL;
1156
1157         mutex_lock(&dev->lock);
1158
1159         dev->ctl_freq = f->frequency;
1160         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1161
1162         mutex_unlock(&dev->lock);
1163
1164         return 0;
1165 }
1166
1167 #ifdef CONFIG_VIDEO_ADV_DEBUG
1168 static int em28xx_reg_len(int reg)
1169 {
1170         switch (reg) {
1171         case EM28XX_R40_AC97LSB:
1172         case EM28XX_R30_HSCALELOW:
1173         case EM28XX_R32_VSCALELOW:
1174                 return 2;
1175         default:
1176                 return 1;
1177         }
1178 }
1179
1180 static int vidioc_g_chip_ident(struct file *file, void *priv,
1181                struct v4l2_dbg_chip_ident *chip)
1182 {
1183         struct em28xx_fh      *fh  = priv;
1184         struct em28xx         *dev = fh->dev;
1185
1186         chip->ident = V4L2_IDENT_NONE;
1187         chip->revision = 0;
1188
1189         em28xx_i2c_call_clients(dev, VIDIOC_DBG_G_CHIP_IDENT, chip);
1190
1191         return 0;
1192 }
1193
1194
1195 static int vidioc_g_register(struct file *file, void *priv,
1196                              struct v4l2_dbg_register *reg)
1197 {
1198         struct em28xx_fh      *fh  = priv;
1199         struct em28xx         *dev = fh->dev;
1200         int ret;
1201
1202         switch (reg->match.type) {
1203         case V4L2_CHIP_MATCH_AC97:
1204                 mutex_lock(&dev->lock);
1205                 ret = em28xx_read_ac97(dev, reg->reg);
1206                 mutex_unlock(&dev->lock);
1207                 if (ret < 0)
1208                         return ret;
1209
1210                 reg->val = ret;
1211                 reg->size = 1;
1212                 return 0;
1213         case V4L2_CHIP_MATCH_I2C_DRIVER:
1214                 em28xx_i2c_call_clients(dev, VIDIOC_DBG_G_REGISTER, reg);
1215                 return 0;
1216         case V4L2_CHIP_MATCH_I2C_ADDR:
1217                 /* Not supported yet */
1218                 return -EINVAL;
1219         default:
1220                 if (!v4l2_chip_match_host(&reg->match))
1221                         return -EINVAL;
1222         }
1223
1224         /* Match host */
1225         reg->size = em28xx_reg_len(reg->reg);
1226         if (reg->size == 1) {
1227                 mutex_lock(&dev->lock);
1228                 ret = em28xx_read_reg(dev, reg->reg);
1229                 mutex_unlock(&dev->lock);
1230
1231                 if (ret < 0)
1232                         return ret;
1233
1234                 reg->val = ret;
1235         } else {
1236                 __le16 val = 0;
1237                 mutex_lock(&dev->lock);
1238                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1239                                                    reg->reg, (char *)&val, 2);
1240                 mutex_unlock(&dev->lock);
1241                 if (ret < 0)
1242                         return ret;
1243
1244                 reg->val = le16_to_cpu(val);
1245         }
1246
1247         return 0;
1248 }
1249
1250 static int vidioc_s_register(struct file *file, void *priv,
1251                              struct v4l2_dbg_register *reg)
1252 {
1253         struct em28xx_fh      *fh  = priv;
1254         struct em28xx         *dev = fh->dev;
1255         __le16 buf;
1256         int    rc;
1257
1258         switch (reg->match.type) {
1259         case V4L2_CHIP_MATCH_AC97:
1260                 mutex_lock(&dev->lock);
1261                 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1262                 mutex_unlock(&dev->lock);
1263
1264                 return rc;
1265         case V4L2_CHIP_MATCH_I2C_DRIVER:
1266                 em28xx_i2c_call_clients(dev, VIDIOC_DBG_S_REGISTER, reg);
1267                 return 0;
1268         case V4L2_CHIP_MATCH_I2C_ADDR:
1269                 /* Not supported yet */
1270                 return -EINVAL;
1271         default:
1272                 if (!v4l2_chip_match_host(&reg->match))
1273                         return -EINVAL;
1274         }
1275
1276         /* Match host */
1277         buf = cpu_to_le16(reg->val);
1278
1279         mutex_lock(&dev->lock);
1280         rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1281                                em28xx_reg_len(reg->reg));
1282         mutex_unlock(&dev->lock);
1283
1284         return rc;
1285 }
1286 #endif
1287
1288
1289 static int vidioc_cropcap(struct file *file, void *priv,
1290                                         struct v4l2_cropcap *cc)
1291 {
1292         struct em28xx_fh      *fh  = priv;
1293         struct em28xx         *dev = fh->dev;
1294
1295         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1296                 return -EINVAL;
1297
1298         cc->bounds.left = 0;
1299         cc->bounds.top = 0;
1300         cc->bounds.width = dev->width;
1301         cc->bounds.height = dev->height;
1302         cc->defrect = cc->bounds;
1303         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1304         cc->pixelaspect.denominator = 59;
1305
1306         return 0;
1307 }
1308
1309 static int vidioc_streamon(struct file *file, void *priv,
1310                                         enum v4l2_buf_type type)
1311 {
1312         struct em28xx_fh      *fh  = priv;
1313         struct em28xx         *dev = fh->dev;
1314         int                   rc;
1315
1316         rc = check_dev(dev);
1317         if (rc < 0)
1318                 return rc;
1319
1320
1321         mutex_lock(&dev->lock);
1322         rc = res_get(fh);
1323
1324         if (likely(rc >= 0))
1325                 rc = videobuf_streamon(&fh->vb_vidq);
1326
1327         mutex_unlock(&dev->lock);
1328
1329         return rc;
1330 }
1331
1332 static int vidioc_streamoff(struct file *file, void *priv,
1333                                         enum v4l2_buf_type type)
1334 {
1335         struct em28xx_fh      *fh  = priv;
1336         struct em28xx         *dev = fh->dev;
1337         int                   rc;
1338
1339         rc = check_dev(dev);
1340         if (rc < 0)
1341                 return rc;
1342
1343         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1344                 return -EINVAL;
1345         if (type != fh->type)
1346                 return -EINVAL;
1347
1348         mutex_lock(&dev->lock);
1349
1350         videobuf_streamoff(&fh->vb_vidq);
1351         res_free(fh);
1352
1353         mutex_unlock(&dev->lock);
1354
1355         return 0;
1356 }
1357
1358 static int vidioc_querycap(struct file *file, void  *priv,
1359                                         struct v4l2_capability *cap)
1360 {
1361         struct em28xx_fh      *fh  = priv;
1362         struct em28xx         *dev = fh->dev;
1363
1364         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1365         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1366         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1367
1368         cap->version = EM28XX_VERSION_CODE;
1369
1370         cap->capabilities =
1371                         V4L2_CAP_SLICED_VBI_CAPTURE |
1372                         V4L2_CAP_VIDEO_CAPTURE |
1373                         V4L2_CAP_AUDIO |
1374                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1375
1376         if (dev->tuner_type != TUNER_ABSENT)
1377                 cap->capabilities |= V4L2_CAP_TUNER;
1378
1379         return 0;
1380 }
1381
1382 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1383                                         struct v4l2_fmtdesc *f)
1384 {
1385         if (unlikely(f->index >= ARRAY_SIZE(format)))
1386                 return -EINVAL;
1387
1388         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1389         f->pixelformat = format[f->index].fourcc;
1390
1391         return 0;
1392 }
1393
1394 /* Sliced VBI ioctls */
1395 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1396                                         struct v4l2_format *f)
1397 {
1398         struct em28xx_fh      *fh  = priv;
1399         struct em28xx         *dev = fh->dev;
1400         int                   rc;
1401
1402         rc = check_dev(dev);
1403         if (rc < 0)
1404                 return rc;
1405
1406         mutex_lock(&dev->lock);
1407
1408         f->fmt.sliced.service_set = 0;
1409
1410         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1411
1412         if (f->fmt.sliced.service_set == 0)
1413                 rc = -EINVAL;
1414
1415         mutex_unlock(&dev->lock);
1416         return rc;
1417 }
1418
1419 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1420                         struct v4l2_format *f)
1421 {
1422         struct em28xx_fh      *fh  = priv;
1423         struct em28xx         *dev = fh->dev;
1424         int                   rc;
1425
1426         rc = check_dev(dev);
1427         if (rc < 0)
1428                 return rc;
1429
1430         mutex_lock(&dev->lock);
1431         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1432         mutex_unlock(&dev->lock);
1433
1434         if (f->fmt.sliced.service_set == 0)
1435                 return -EINVAL;
1436
1437         return 0;
1438 }
1439
1440
1441 static int vidioc_reqbufs(struct file *file, void *priv,
1442                           struct v4l2_requestbuffers *rb)
1443 {
1444         struct em28xx_fh      *fh  = priv;
1445         struct em28xx         *dev = fh->dev;
1446         int                   rc;
1447
1448         rc = check_dev(dev);
1449         if (rc < 0)
1450                 return rc;
1451
1452         return videobuf_reqbufs(&fh->vb_vidq, rb);
1453 }
1454
1455 static int vidioc_querybuf(struct file *file, void *priv,
1456                            struct v4l2_buffer *b)
1457 {
1458         struct em28xx_fh      *fh  = priv;
1459         struct em28xx         *dev = fh->dev;
1460         int                   rc;
1461
1462         rc = check_dev(dev);
1463         if (rc < 0)
1464                 return rc;
1465
1466         return videobuf_querybuf(&fh->vb_vidq, b);
1467 }
1468
1469 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1470 {
1471         struct em28xx_fh      *fh  = priv;
1472         struct em28xx         *dev = fh->dev;
1473         int                   rc;
1474
1475         rc = check_dev(dev);
1476         if (rc < 0)
1477                 return rc;
1478
1479         return videobuf_qbuf(&fh->vb_vidq, b);
1480 }
1481
1482 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1483 {
1484         struct em28xx_fh      *fh  = priv;
1485         struct em28xx         *dev = fh->dev;
1486         int                   rc;
1487
1488         rc = check_dev(dev);
1489         if (rc < 0)
1490                 return rc;
1491
1492         return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
1493 }
1494
1495 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1496 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1497 {
1498         struct em28xx_fh  *fh = priv;
1499
1500         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1501 }
1502 #endif
1503
1504
1505 /* ----------------------------------------------------------- */
1506 /* RADIO ESPECIFIC IOCTLS                                      */
1507 /* ----------------------------------------------------------- */
1508
1509 static int radio_querycap(struct file *file, void  *priv,
1510                           struct v4l2_capability *cap)
1511 {
1512         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1513
1514         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1515         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1516         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1517
1518         cap->version = EM28XX_VERSION_CODE;
1519         cap->capabilities = V4L2_CAP_TUNER;
1520         return 0;
1521 }
1522
1523 static int radio_g_tuner(struct file *file, void *priv,
1524                          struct v4l2_tuner *t)
1525 {
1526         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1527
1528         if (unlikely(t->index > 0))
1529                 return -EINVAL;
1530
1531         strcpy(t->name, "Radio");
1532         t->type = V4L2_TUNER_RADIO;
1533
1534         mutex_lock(&dev->lock);
1535         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1536         mutex_unlock(&dev->lock);
1537
1538         return 0;
1539 }
1540
1541 static int radio_enum_input(struct file *file, void *priv,
1542                             struct v4l2_input *i)
1543 {
1544         if (i->index != 0)
1545                 return -EINVAL;
1546         strcpy(i->name, "Radio");
1547         i->type = V4L2_INPUT_TYPE_TUNER;
1548
1549         return 0;
1550 }
1551
1552 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1553 {
1554         if (unlikely(a->index))
1555                 return -EINVAL;
1556
1557         strcpy(a->name, "Radio");
1558         return 0;
1559 }
1560
1561 static int radio_s_tuner(struct file *file, void *priv,
1562                          struct v4l2_tuner *t)
1563 {
1564         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1565
1566         if (0 != t->index)
1567                 return -EINVAL;
1568
1569         mutex_lock(&dev->lock);
1570         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1571         mutex_unlock(&dev->lock);
1572
1573         return 0;
1574 }
1575
1576 static int radio_s_audio(struct file *file, void *fh,
1577                          struct v4l2_audio *a)
1578 {
1579         return 0;
1580 }
1581
1582 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1583 {
1584         return 0;
1585 }
1586
1587 static int radio_queryctrl(struct file *file, void *priv,
1588                            struct v4l2_queryctrl *qc)
1589 {
1590         int i;
1591
1592         if (qc->id <  V4L2_CID_BASE ||
1593                 qc->id >= V4L2_CID_LASTP1)
1594                 return -EINVAL;
1595
1596         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1597                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1598                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1599                         return 0;
1600                 }
1601         }
1602
1603         return -EINVAL;
1604 }
1605
1606 /*
1607  * em28xx_v4l2_open()
1608  * inits the device and starts isoc transfer
1609  */
1610 static int em28xx_v4l2_open(struct file *filp)
1611 {
1612         int minor = video_devdata(filp)->minor;
1613         int errCode = 0, radio;
1614         struct em28xx *dev;
1615         enum v4l2_buf_type fh_type;
1616         struct em28xx_fh *fh;
1617
1618         dev = em28xx_get_device(minor, &fh_type, &radio);
1619
1620         if (NULL == dev)
1621                 return -ENODEV;
1622
1623         mutex_lock(&dev->lock);
1624
1625         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1626                                 minor, v4l2_type_names[fh_type], dev->users);
1627
1628
1629         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1630         if (!fh) {
1631                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1632                 mutex_unlock(&dev->lock);
1633                 return -ENOMEM;
1634         }
1635         fh->dev = dev;
1636         fh->radio = radio;
1637         fh->type = fh_type;
1638         filp->private_data = fh;
1639
1640         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1641                 dev->width = norm_maxw(dev);
1642                 dev->height = norm_maxh(dev);
1643                 dev->hscale = 0;
1644                 dev->vscale = 0;
1645
1646                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1647                 em28xx_set_alternate(dev);
1648                 em28xx_resolution_set(dev);
1649
1650                 /* Needed, since GPIO might have disabled power of
1651                    some i2c device
1652                  */
1653                 em28xx_wake_i2c(dev);
1654
1655         }
1656         if (fh->radio) {
1657                 em28xx_videodbg("video_open: setting radio device\n");
1658                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1659         }
1660
1661         dev->users++;
1662
1663         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1664                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1665                         sizeof(struct em28xx_buffer), fh);
1666
1667         mutex_unlock(&dev->lock);
1668
1669         return errCode;
1670 }
1671
1672 /*
1673  * em28xx_realease_resources()
1674  * unregisters the v4l2,i2c and usb devices
1675  * called when the device gets disconected or at module unload
1676 */
1677 void em28xx_release_analog_resources(struct em28xx *dev)
1678 {
1679
1680         /*FIXME: I2C IR should be disconnected */
1681
1682         if (dev->radio_dev) {
1683                 if (-1 != dev->radio_dev->minor)
1684                         video_unregister_device(dev->radio_dev);
1685                 else
1686                         video_device_release(dev->radio_dev);
1687                 dev->radio_dev = NULL;
1688         }
1689         if (dev->vbi_dev) {
1690                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
1691                             dev->vbi_dev->num);
1692                 if (-1 != dev->vbi_dev->minor)
1693                         video_unregister_device(dev->vbi_dev);
1694                 else
1695                         video_device_release(dev->vbi_dev);
1696                 dev->vbi_dev = NULL;
1697         }
1698         if (dev->vdev) {
1699                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
1700                             dev->vdev->num);
1701                 if (-1 != dev->vdev->minor)
1702                         video_unregister_device(dev->vdev);
1703                 else
1704                         video_device_release(dev->vdev);
1705                 dev->vdev = NULL;
1706         }
1707 }
1708
1709 /*
1710  * em28xx_v4l2_close()
1711  * stops streaming and deallocates all resources allocated by the v4l2
1712  * calls and ioctls
1713  */
1714 static int em28xx_v4l2_close(struct file *filp)
1715 {
1716         struct em28xx_fh *fh  = filp->private_data;
1717         struct em28xx    *dev = fh->dev;
1718         int              errCode;
1719
1720         em28xx_videodbg("users=%d\n", dev->users);
1721
1722
1723         mutex_lock(&dev->lock);
1724         if (res_check(fh))
1725                 res_free(fh);
1726
1727         if (dev->users == 1) {
1728                 videobuf_stop(&fh->vb_vidq);
1729                 videobuf_mmap_free(&fh->vb_vidq);
1730
1731                 /* the device is already disconnect,
1732                    free the remaining resources */
1733                 if (dev->state & DEV_DISCONNECTED) {
1734                         em28xx_release_resources(dev);
1735                         mutex_unlock(&dev->lock);
1736                         kfree(dev);
1737                         return 0;
1738                 }
1739
1740                 /* Save some power by putting tuner to sleep */
1741                 em28xx_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL);
1742
1743                 /* do this before setting alternate! */
1744                 em28xx_uninit_isoc(dev);
1745                 em28xx_set_mode(dev, EM28XX_SUSPEND);
1746
1747                 /* set alternate 0 */
1748                 dev->alt = 0;
1749                 em28xx_videodbg("setting alternate 0\n");
1750                 errCode = usb_set_interface(dev->udev, 0, 0);
1751                 if (errCode < 0) {
1752                         em28xx_errdev("cannot change alternate number to "
1753                                         "0 (error=%i)\n", errCode);
1754                 }
1755         }
1756         kfree(fh);
1757         dev->users--;
1758         wake_up_interruptible_nr(&dev->open, 1);
1759         mutex_unlock(&dev->lock);
1760         return 0;
1761 }
1762
1763 /*
1764  * em28xx_v4l2_read()
1765  * will allocate buffers when called for the first time
1766  */
1767 static ssize_t
1768 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1769                  loff_t *pos)
1770 {
1771         struct em28xx_fh *fh = filp->private_data;
1772         struct em28xx *dev = fh->dev;
1773         int rc;
1774
1775         rc = check_dev(dev);
1776         if (rc < 0)
1777                 return rc;
1778
1779         /* FIXME: read() is not prepared to allow changing the video
1780            resolution while streaming. Seems a bug at em28xx_set_fmt
1781          */
1782
1783         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1784                 mutex_lock(&dev->lock);
1785                 rc = res_get(fh);
1786                 mutex_unlock(&dev->lock);
1787
1788                 if (unlikely(rc < 0))
1789                         return rc;
1790
1791                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1792                                         filp->f_flags & O_NONBLOCK);
1793         }
1794         return 0;
1795 }
1796
1797 /*
1798  * em28xx_v4l2_poll()
1799  * will allocate buffers when called for the first time
1800  */
1801 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
1802 {
1803         struct em28xx_fh *fh = filp->private_data;
1804         struct em28xx *dev = fh->dev;
1805         int rc;
1806
1807         rc = check_dev(dev);
1808         if (rc < 0)
1809                 return rc;
1810
1811         mutex_lock(&dev->lock);
1812         rc = res_get(fh);
1813         mutex_unlock(&dev->lock);
1814
1815         if (unlikely(rc < 0))
1816                 return POLLERR;
1817
1818         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1819                 return POLLERR;
1820
1821         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1822 }
1823
1824 /*
1825  * em28xx_v4l2_mmap()
1826  */
1827 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1828 {
1829         struct em28xx_fh *fh    = filp->private_data;
1830         struct em28xx    *dev   = fh->dev;
1831         int              rc;
1832
1833         rc = check_dev(dev);
1834         if (rc < 0)
1835                 return rc;
1836
1837         mutex_lock(&dev->lock);
1838         rc = res_get(fh);
1839         mutex_unlock(&dev->lock);
1840
1841         if (unlikely(rc < 0))
1842                 return rc;
1843
1844         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1845
1846         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1847                 (unsigned long)vma->vm_start,
1848                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1849                 rc);
1850
1851         return rc;
1852 }
1853
1854 static const struct v4l2_file_operations em28xx_v4l_fops = {
1855         .owner         = THIS_MODULE,
1856         .open          = em28xx_v4l2_open,
1857         .release       = em28xx_v4l2_close,
1858         .read          = em28xx_v4l2_read,
1859         .poll          = em28xx_v4l2_poll,
1860         .mmap          = em28xx_v4l2_mmap,
1861         .ioctl         = video_ioctl2,
1862 };
1863
1864 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1865         .vidioc_querycap            = vidioc_querycap,
1866         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1867         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1868         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1869         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1870         .vidioc_g_audio             = vidioc_g_audio,
1871         .vidioc_s_audio             = vidioc_s_audio,
1872         .vidioc_cropcap             = vidioc_cropcap,
1873
1874         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1875         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1876         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1877
1878         .vidioc_reqbufs             = vidioc_reqbufs,
1879         .vidioc_querybuf            = vidioc_querybuf,
1880         .vidioc_qbuf                = vidioc_qbuf,
1881         .vidioc_dqbuf               = vidioc_dqbuf,
1882         .vidioc_s_std               = vidioc_s_std,
1883         .vidioc_enum_input          = vidioc_enum_input,
1884         .vidioc_g_input             = vidioc_g_input,
1885         .vidioc_s_input             = vidioc_s_input,
1886         .vidioc_queryctrl           = vidioc_queryctrl,
1887         .vidioc_g_ctrl              = vidioc_g_ctrl,
1888         .vidioc_s_ctrl              = vidioc_s_ctrl,
1889         .vidioc_streamon            = vidioc_streamon,
1890         .vidioc_streamoff           = vidioc_streamoff,
1891         .vidioc_g_tuner             = vidioc_g_tuner,
1892         .vidioc_s_tuner             = vidioc_s_tuner,
1893         .vidioc_g_frequency         = vidioc_g_frequency,
1894         .vidioc_s_frequency         = vidioc_s_frequency,
1895 #ifdef CONFIG_VIDEO_ADV_DEBUG
1896         .vidioc_g_register          = vidioc_g_register,
1897         .vidioc_s_register          = vidioc_s_register,
1898         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
1899 #endif
1900 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1901         .vidiocgmbuf                = vidiocgmbuf,
1902 #endif
1903 };
1904
1905 static const struct video_device em28xx_video_template = {
1906         .fops                       = &em28xx_v4l_fops,
1907         .release                    = video_device_release,
1908         .ioctl_ops                  = &video_ioctl_ops,
1909
1910         .minor                      = -1,
1911
1912         .tvnorms                    = V4L2_STD_ALL,
1913         .current_norm               = V4L2_STD_PAL,
1914 };
1915
1916 static const struct v4l2_file_operations radio_fops = {
1917         .owner         = THIS_MODULE,
1918         .open          = em28xx_v4l2_open,
1919         .release       = em28xx_v4l2_close,
1920         .ioctl         = video_ioctl2,
1921 };
1922
1923 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1924         .vidioc_querycap      = radio_querycap,
1925         .vidioc_g_tuner       = radio_g_tuner,
1926         .vidioc_enum_input    = radio_enum_input,
1927         .vidioc_g_audio       = radio_g_audio,
1928         .vidioc_s_tuner       = radio_s_tuner,
1929         .vidioc_s_audio       = radio_s_audio,
1930         .vidioc_s_input       = radio_s_input,
1931         .vidioc_queryctrl     = radio_queryctrl,
1932         .vidioc_g_ctrl        = vidioc_g_ctrl,
1933         .vidioc_s_ctrl        = vidioc_s_ctrl,
1934         .vidioc_g_frequency   = vidioc_g_frequency,
1935         .vidioc_s_frequency   = vidioc_s_frequency,
1936 #ifdef CONFIG_VIDEO_ADV_DEBUG
1937         .vidioc_g_register    = vidioc_g_register,
1938         .vidioc_s_register    = vidioc_s_register,
1939 #endif
1940 };
1941
1942 static struct video_device em28xx_radio_template = {
1943         .name                 = "em28xx-radio",
1944         .fops                 = &radio_fops,
1945         .ioctl_ops            = &radio_ioctl_ops,
1946         .minor                = -1,
1947 };
1948
1949 /******************************** usb interface ******************************/
1950
1951
1952
1953 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1954                                         const struct video_device *template,
1955                                         const char *type_name)
1956 {
1957         struct video_device *vfd;
1958
1959         vfd = video_device_alloc();
1960         if (NULL == vfd)
1961                 return NULL;
1962         *vfd = *template;
1963         vfd->minor   = -1;
1964         vfd->parent = &dev->udev->dev;
1965         vfd->release = video_device_release;
1966         vfd->debug = video_debug;
1967
1968         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1969                  dev->name, type_name);
1970
1971         return vfd;
1972 }
1973
1974 int em28xx_register_analog_devices(struct em28xx *dev)
1975 {
1976       u8 val;
1977         int ret;
1978
1979         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
1980                 dev->name,
1981                 (EM28XX_VERSION_CODE >> 16) & 0xff,
1982                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1983
1984         /* set default norm */
1985         dev->norm = em28xx_video_template.current_norm;
1986         dev->width = norm_maxw(dev);
1987         dev->height = norm_maxh(dev);
1988         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1989         dev->hscale = 0;
1990         dev->vscale = 0;
1991         dev->ctl_input = 0;
1992
1993         /* Analog specific initialization */
1994         dev->format = &format[0];
1995         video_mux(dev, dev->ctl_input);
1996
1997         /* Audio defaults */
1998         dev->mute = 1;
1999         dev->volume = 0x1f;
2000
2001         /* enable vbi capturing */
2002
2003 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2004         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2005         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2006                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2007         em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x51);
2008
2009         em28xx_set_outfmt(dev);
2010         em28xx_colorlevels_set_default(dev);
2011         em28xx_compression_disable(dev);
2012
2013         /* allocate and fill video video_device struct */
2014         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2015         if (!dev->vdev) {
2016                 em28xx_errdev("cannot allocate video_device.\n");
2017                 return -ENODEV;
2018         }
2019
2020         /* register v4l2 video video_device */
2021         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2022                                        video_nr[dev->devno]);
2023         if (ret) {
2024                 em28xx_errdev("unable to register video device (error=%i).\n",
2025                               ret);
2026                 return ret;
2027         }
2028
2029         /* Allocate and fill vbi video_device struct */
2030         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
2031
2032         /* register v4l2 vbi video_device */
2033         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2034                                         vbi_nr[dev->devno]);
2035         if (ret < 0) {
2036                 em28xx_errdev("unable to register vbi device\n");
2037                 return ret;
2038         }
2039
2040         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2041                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2042                                                   "radio");
2043                 if (!dev->radio_dev) {
2044                         em28xx_errdev("cannot allocate video_device.\n");
2045                         return -ENODEV;
2046                 }
2047                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2048                                             radio_nr[dev->devno]);
2049                 if (ret < 0) {
2050                         em28xx_errdev("can't register radio device\n");
2051                         return ret;
2052                 }
2053                 em28xx_info("Registered radio device as /dev/radio%d\n",
2054                             dev->radio_dev->num);
2055         }
2056
2057         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2058                                 dev->vdev->num, dev->vbi_dev->num);
2059
2060         return 0;
2061 }