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   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                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 190         }
 191         if (lencopy <= 0)
 192                 return;
 193         memcpy(startwrite, startread, lencopy);
 194
 195         remain -= lencopy;
 196
 197         while (remain > 0) {
 198                 startwrite += lencopy + bytesperline;
 199                 startread += lencopy;
 200                 if (bytesperline > remain)
 201                         lencopy = remain;
 202                 else
 203                         lencopy = bytesperline;
 204
 205                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 206                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 207                                        ((char *)startwrite + lencopy) -
 208                                        ((char *)outp + buf->vb.size));
 209                         lencopy = remain = (char *)outp + buf->vb.size -
 210                                            (char *)startwrite;
 211                 }
 212                 if (lencopy <= 0)
 213                         break;
 214
 215                 memcpy(startwrite, startread, lencopy);
 216
 217                 remain -= lencopy;
 218         }
 219
 220         dma_q->pos += len;
 221 }
 222
 223 static inline void print_err_status(struct em28xx *dev,
 224                                      int packet, int status)
 225 {
 226         char *errmsg = "Unknown";
 227
 228         switch (status) {
 229         case -ENOENT:
 230                 errmsg = "unlinked synchronuously";
 231                 break;
 232         case -ECONNRESET:
 233                 errmsg = "unlinked asynchronuously";
 234                 break;
 235         case -ENOSR:
 236                 errmsg = "Buffer error (overrun)";
 237                 break;
 238         case -EPIPE:
 239                 errmsg = "Stalled (device not responding)";
 240                 break;
 241         case -EOVERFLOW:
 242                 errmsg = "Babble (bad cable?)";
 243                 break;
 244         case -EPROTO:
 245                 errmsg = "Bit-stuff error (bad cable?)";
 246                 break;
 247         case -EILSEQ:
 248                 errmsg = "CRC/Timeout (could be anything)";
 249                 break;
 250         case -ETIME:
 251                 errmsg = "Device does not respond";
 252                 break;
 253         }
 254         if (packet < 0) {
 255                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 256         } else {
 257                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 258                                packet, status, errmsg);
 259         }
 260 }
 261
 262 /*
 263  * video-buf generic routine to get the next available buffer
 264  */
 265 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 266                                           struct em28xx_buffer **buf)
 267 {
 268         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 269         char *outp;
 270
 271         if (list_empty(&dma_q->active)) {
 272                 em28xx_isocdbg("No active queue to serve\n");
 273                 dev->isoc_ctl.buf = NULL;
 274                 *buf = NULL;
 275                 return;
 276         }
 277
 278         /* Get the next buffer */
 279         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 280
 281         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 282         outp = videobuf_to_vmalloc(&(*buf)->vb);
 283         memset(outp, 0, (*buf)->vb.size);
 284
 285         dev->isoc_ctl.buf = *buf;
 286
 287         return;
 288 }
 289
 290 /*
 291  * Controls the isoc copy of each urb packet
 292  */
 293 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 294 {
 295         struct em28xx_buffer    *buf;
 296         struct em28xx_dmaqueue  *dma_q = urb->context;
 297         unsigned char *outp = NULL;
 298         int i, len = 0, rc = 1;
 299         unsigned char *p;
 300
 301         if (!dev)
 302                 return 0;
 303
 304         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 305                 return 0;
 306
 307         if (urb->status < 0) {
 308                 print_err_status(dev, -1, urb->status);
 309                 if (urb->status == -ENOENT)
 310                         return 0;
 311         }
 312
 313         buf = dev->isoc_ctl.buf;
 314         if (buf != NULL)
 315                 outp = videobuf_to_vmalloc(&buf->vb);
 316
 317         for (i = 0; i < urb->number_of_packets; i++) {
 318                 int status = urb->iso_frame_desc[i].status;
 319
 320                 if (status < 0) {
 321                         print_err_status(dev, i, status);
 322                         if (urb->iso_frame_desc[i].status != -EPROTO)
 323                                 continue;
 324                 }
 325
 326                 len = urb->iso_frame_desc[i].actual_length - 4;
 327
 328                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 329                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 330                         continue;
 331                 }
 332                 if (urb->iso_frame_desc[i].actual_length >
 333                                                 dev->max_pkt_size) {
 334                         em28xx_isocdbg("packet bigger than packet size");
 335                         continue;
 336                 }
 337
 338                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 339
 340                 /* FIXME: incomplete buffer checks where removed to make
 341                    logic simpler. Impacts of those changes should be evaluated
 342                  */
 343                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 344                         em28xx_isocdbg("VBI HEADER!!!\n");
 345                         /* FIXME: Should add vbi copy */
 346                         continue;
 347                 }
 348                 if (p[0] == 0x22 && p[1] == 0x5a) {
 349                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 350                                        len, (p[2] & 1)? "odd" : "even");
 351
 352                         if (!(p[2] & 1)) {
 353                                 if (buf != NULL)
 354                                         buffer_filled(dev, dma_q, buf);
 355                                 get_next_buf(dma_q, &buf);
 356                                 if (buf == NULL)
 357                                         outp = NULL;
 358                                 else
 359                                         outp = videobuf_to_vmalloc(&buf->vb);
 360                         }
 361
 362                         if (buf != NULL) {
 363                                 if (p[2] & 1)
 364                                         buf->top_field = 0;
 365                                 else
 366                                         buf->top_field = 1;
 367                         }
 368
 369                         dma_q->pos = 0;
 370                 }
 371                 if (buf != NULL)
 372                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 373         }
 374         return rc;
 375 }
 376
 377 /* ------------------------------------------------------------------
 378         Videobuf operations
 379    ------------------------------------------------------------------*/
 380
 381 static int
 382 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 383 {
 384         struct em28xx_fh *fh = vq->priv_data;
 385         struct em28xx        *dev = fh->dev;
 386         struct v4l2_frequency f;
 387
 388         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
 389
 390         if (0 == *count)
 391                 *count = EM28XX_DEF_BUF;
 392
 393         if (*count < EM28XX_MIN_BUF)
 394                 *count = EM28XX_MIN_BUF;
 395
 396         /* Ask tuner to go to analog or radio mode */
 397         memset(&f, 0, sizeof(f));
 398         f.frequency = dev->ctl_freq;
 399         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 400
 401         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 402
 403         return 0;
 404 }
 405
 406 /* This is called *without* dev->slock held; please keep it that way */
 407 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 408 {
 409         struct em28xx_fh     *fh  = vq->priv_data;
 410         struct em28xx        *dev = fh->dev;
 411         unsigned long flags = 0;
 412         if (in_interrupt())
 413                 BUG();
 414
 415         /* We used to wait for the buffer to finish here, but this didn't work
 416            because, as we were keeping the state as VIDEOBUF_QUEUED,
 417            videobuf_queue_cancel marked it as finished for us.
 418            (Also, it could wedge forever if the hardware was misconfigured.)
 419
 420            This should be safe; by the time we get here, the buffer isn't
 421            queued anymore. If we ever start marking the buffers as
 422            VIDEOBUF_ACTIVE, it won't be, though.
 423         */
 424         spin_lock_irqsave(&dev->slock, flags);
 425         if (dev->isoc_ctl.buf == buf)
 426                 dev->isoc_ctl.buf = NULL;
 427         spin_unlock_irqrestore(&dev->slock, flags);
 428
 429         videobuf_vmalloc_free(&buf->vb);
 430         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 431 }
 432
 433 static int
 434 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 435                                                 enum v4l2_field field)
 436 {
 437         struct em28xx_fh     *fh  = vq->priv_data;
 438         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 439         struct em28xx        *dev = fh->dev;
 440         int                  rc = 0, urb_init = 0;
 441
 442         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
 443
 444         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 445                 return -EINVAL;
 446
 447         buf->vb.width  = dev->width;
 448         buf->vb.height = dev->height;
 449         buf->vb.field  = field;
 450
 451         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 452                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 453                 if (rc < 0)
 454                         goto fail;
 455         }
 456
 457         if (!dev->isoc_ctl.num_bufs)
 458                 urb_init = 1;
 459
 460         if (urb_init) {
 461                 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 462                                       EM28XX_NUM_BUFS, dev->max_pkt_size,
 463                                       em28xx_isoc_copy);
 464                 if (rc < 0)
 465                         goto fail;
 466         }
 467
 468         buf->vb.state = VIDEOBUF_PREPARED;
 469         return 0;
 470
 471 fail:
 472         free_buffer(vq, buf);
 473         return rc;
 474 }
 475
 476 static void
 477 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 478 {
 479         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
 480         struct em28xx_fh        *fh      = vq->priv_data;
 481         struct em28xx           *dev     = fh->dev;
 482         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 483
 484         buf->vb.state = VIDEOBUF_QUEUED;
 485         list_add_tail(&buf->vb.queue, &vidq->active);
 486
 487 }
 488
 489 static void buffer_release(struct videobuf_queue *vq,
 490                                 struct videobuf_buffer *vb)
 491 {
 492         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
 493         struct em28xx_fh       *fh   = vq->priv_data;
 494         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 495
 496         em28xx_isocdbg("em28xx: called buffer_release\n");
 497
 498         free_buffer(vq, buf);
 499 }
 500
 501 static struct videobuf_queue_ops em28xx_video_qops = {
 502         .buf_setup      = buffer_setup,
 503         .buf_prepare    = buffer_prepare,
 504         .buf_queue      = buffer_queue,
 505         .buf_release    = buffer_release,
 506 };
 507
 508 /*********************  v4l2 interface  **************************************/
 509
 510 static void video_mux(struct em28xx *dev, int index)
 511 {
 512         struct v4l2_routing route;
 513
 514         route.input = INPUT(index)->vmux;
 515         route.output = 0;
 516         dev->ctl_input = index;
 517         dev->ctl_ainput = INPUT(index)->amux;
 518         dev->ctl_aoutput = INPUT(index)->aout;
 519
 520         if (!dev->ctl_aoutput)
 521                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 522
 523         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 524
 525         if (dev->board.has_msp34xx) {
 526                 if (dev->i2s_speed) {
 527                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 528                                 &dev->i2s_speed);
 529                 }
 530                 route.input = dev->ctl_ainput;
 531                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 532                 /* Note: this is msp3400 specific */
 533                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 534                         &route);
 535         }
 536
 537         em28xx_audio_analog_set(dev);
 538 }
 539
 540 /* Usage lock check functions */
 541 static int res_get(struct em28xx_fh *fh)
 542 {
 543         struct em28xx    *dev = fh->dev;
 544         int              rc   = 0;
 545
 546         /* This instance already has stream_on */
 547         if (fh->stream_on)
 548                 return rc;
 549
 550         if (dev->stream_on)
 551                 return -EBUSY;
 552
 553         dev->stream_on = 1;
 554         fh->stream_on  = 1;
 555         return rc;
 556 }
 557
 558 static int res_check(struct em28xx_fh *fh)
 559 {
 560         return (fh->stream_on);
 561 }
 562
 563 static void res_free(struct em28xx_fh *fh)
 564 {
 565         struct em28xx    *dev = fh->dev;
 566
 567         fh->stream_on = 0;
 568         dev->stream_on = 0;
 569 }
 570
 571 /*
 572  * em28xx_get_ctrl()
 573  * return the current saturation, brightness or contrast, mute state
 574  */
 575 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 576 {
 577         switch (ctrl->id) {
 578         case V4L2_CID_AUDIO_MUTE:
 579                 ctrl->value = dev->mute;
 580                 return 0;
 581         case V4L2_CID_AUDIO_VOLUME:
 582                 ctrl->value = dev->volume;
 583                 return 0;
 584         default:
 585                 return -EINVAL;
 586         }
 587 }
 588
 589 /*
 590  * em28xx_set_ctrl()
 591  * mute or set new saturation, brightness or contrast
 592  */
 593 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 594 {
 595         switch (ctrl->id) {
 596         case V4L2_CID_AUDIO_MUTE:
 597                 if (ctrl->value != dev->mute) {
 598                         dev->mute = ctrl->value;
 599                         return em28xx_audio_analog_set(dev);
 600                 }
 601                 return 0;
 602         case V4L2_CID_AUDIO_VOLUME:
 603                 dev->volume = ctrl->value;
 604                 return em28xx_audio_analog_set(dev);
 605         default:
 606                 return -EINVAL;
 607         }
 608 }
 609
 610 static int check_dev(struct em28xx *dev)
 611 {
 612         if (dev->state & DEV_DISCONNECTED) {
 613                 em28xx_errdev("v4l2 ioctl: device not present\n");
 614                 return -ENODEV;
 615         }
 616
 617         if (dev->state & DEV_MISCONFIGURED) {
 618                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 619                               "close and open it again\n");
 620                 return -EIO;
 621         }
 622         return 0;
 623 }
 624
 625 static void get_scale(struct em28xx *dev,
 626                         unsigned int width, unsigned int height,
 627                         unsigned int *hscale, unsigned int *vscale)
 628 {
 629         unsigned int          maxw   = norm_maxw(dev);
 630         unsigned int          maxh   = norm_maxh(dev);
 631
 632         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 633         if (*hscale >= 0x4000)
 634                 *hscale = 0x3fff;
 635
 636         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 637         if (*vscale >= 0x4000)
 638                 *vscale = 0x3fff;
 639 }
 640
 641 /* ------------------------------------------------------------------
 642         IOCTL vidioc handling
 643    ------------------------------------------------------------------*/
 644
 645 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 646                                         struct v4l2_format *f)
 647 {
 648         struct em28xx_fh      *fh  = priv;
 649         struct em28xx         *dev = fh->dev;
 650
 651         mutex_lock(&dev->lock);
 652
 653         f->fmt.pix.width = dev->width;
 654         f->fmt.pix.height = dev->height;
 655         f->fmt.pix.pixelformat = dev->format->fourcc;
 656         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
 657         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 658         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 659
 660         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 661         f->fmt.pix.field = dev->interlaced ?
 662                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 663
 664         mutex_unlock(&dev->lock);
 665         return 0;
 666 }
 667
 668 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
 669 {
 670         unsigned int i;
 671
 672         for (i = 0; i < ARRAY_SIZE(format); i++)
 673                 if (format[i].fourcc == fourcc)
 674                         return &format[i];
 675
 676         return NULL;
 677 }
 678
 679 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 680                         struct v4l2_format *f)
 681 {
 682         struct em28xx_fh      *fh    = priv;
 683         struct em28xx         *dev   = fh->dev;
 684         int                   width  = f->fmt.pix.width;
 685         int                   height = f->fmt.pix.height;
 686         unsigned int          maxw   = norm_maxw(dev);
 687         unsigned int          maxh   = norm_maxh(dev);
 688         unsigned int          hscale, vscale;
 689         struct em28xx_fmt     *fmt;
 690
 691         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 692         if (!fmt) {
 693                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
 694                                 f->fmt.pix.pixelformat);
 695                 return -EINVAL;
 696         }
 697
 698         /* width must even because of the YUYV format
 699            height must be even because of interlacing */
 700         height &= 0xfffe;
 701         width  &= 0xfffe;
 702
 703         if (unlikely(height < 32))
 704                 height = 32;
 705         if (unlikely(height > maxh))
 706                 height = maxh;
 707         if (unlikely(width < 48))
 708                 width = 48;
 709         if (unlikely(width > maxw))
 710                 width = maxw;
 711
 712         if (dev->board.is_em2800) {
 713                 /* the em2800 can only scale down to 50% */
 714                 if (height % (maxh / 2))
 715                         height = maxh;
 716                 if (width % (maxw / 2))
 717                         width = maxw;
 718                 /* according to empiatech support */
 719                 /* the MaxPacketSize is to small to support */
 720                 /* framesizes larger than 640x480 @ 30 fps */
 721                 /* or 640x576 @ 25 fps. As this would cut */
 722                 /* of a part of the image we prefer */
 723                 /* 360x576 or 360x480 for now */
 724                 if (width == maxw && height == maxh)
 725                         width /= 2;
 726         }
 727
 728         get_scale(dev, width, height, &hscale, &vscale);
 729
 730         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 731         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 732
 733         f->fmt.pix.width = width;
 734         f->fmt.pix.height = height;
 735         f->fmt.pix.pixelformat = fmt->fourcc;
 736         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
 737         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
 738         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 739         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 740
 741         return 0;
 742 }
 743
 744 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 745                         struct v4l2_format *f)
 746 {
 747         struct em28xx_fh      *fh  = priv;
 748         struct em28xx         *dev = fh->dev;
 749         int                   rc;
 750         struct em28xx_fmt     *fmt;
 751
 752         rc = check_dev(dev);
 753         if (rc < 0)
 754                 return rc;
 755
 756         mutex_lock(&dev->lock);
 757
 758         vidioc_try_fmt_vid_cap(file, priv, f);
 759
 760         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 761         if (!fmt) {
 762                 rc = -EINVAL;
 763                 goto out;
 764         }
 765
 766         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 767                 em28xx_errdev("%s queue busy\n", __func__);
 768                 rc = -EBUSY;
 769                 goto out;
 770         }
 771
 772         if (dev->stream_on && !fh->stream_on) {
 773                 em28xx_errdev("%s device in use by another fh\n", __func__);
 774                 rc = -EBUSY;
 775                 goto out;
 776         }
 777
 778         /* set new image size */
 779         dev->width = f->fmt.pix.width;
 780         dev->height = f->fmt.pix.height;
 781         dev->format = fmt;
 782         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 783
 784         em28xx_set_alternate(dev);
 785         em28xx_resolution_set(dev);
 786
 787         rc = 0;
 788
 789 out:
 790         mutex_unlock(&dev->lock);
 791         return rc;
 792 }
 793
 794 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
 795 {
 796         struct em28xx_fh   *fh  = priv;
 797         struct em28xx      *dev = fh->dev;
 798         struct v4l2_format f;
 799         int                rc;
 800
 801         rc = check_dev(dev);
 802         if (rc < 0)
 803                 return rc;
 804
 805         mutex_lock(&dev->lock);
 806         dev->norm = *norm;
 807
 808         /* Adjusts width/height, if needed */
 809         f.fmt.pix.width = dev->width;
 810         f.fmt.pix.height = dev->height;
 811         vidioc_try_fmt_vid_cap(file, priv, &f);
 812
 813         /* set new image size */
 814         dev->width = f.fmt.pix.width;
 815         dev->height = f.fmt.pix.height;
 816         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 817
 818         em28xx_resolution_set(dev);
 819         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 820
 821         mutex_unlock(&dev->lock);
 822         return 0;
 823 }
 824
 825 static const char *iname[] = {
 826         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 827         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 828         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 829         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 830         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 831         [EM28XX_VMUX_TELEVISION] = "Television",
 832         [EM28XX_VMUX_CABLE]      = "Cable TV",
 833         [EM28XX_VMUX_DVB]        = "DVB",
 834         [EM28XX_VMUX_DEBUG]      = "for debug only",
 835 };
 836
 837 static int vidioc_enum_input(struct file *file, void *priv,
 838                                 struct v4l2_input *i)
 839 {
 840         struct em28xx_fh   *fh  = priv;
 841         struct em28xx      *dev = fh->dev;
 842         unsigned int       n;
 843
 844         n = i->index;
 845         if (n >= MAX_EM28XX_INPUT)
 846                 return -EINVAL;
 847         if (0 == INPUT(n)->type)
 848                 return -EINVAL;
 849
 850         i->index = n;
 851         i->type = V4L2_INPUT_TYPE_CAMERA;
 852
 853         strcpy(i->name, iname[INPUT(n)->type]);
 854
 855         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 856                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 857                 i->type = V4L2_INPUT_TYPE_TUNER;
 858
 859         i->std = dev->vdev->tvnorms;
 860
 861         return 0;
 862 }
 863
 864 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 865 {
 866         struct em28xx_fh   *fh  = priv;
 867         struct em28xx      *dev = fh->dev;
 868
 869         *i = dev->ctl_input;
 870
 871         return 0;
 872 }
 873
 874 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 875 {
 876         struct em28xx_fh   *fh  = priv;
 877         struct em28xx      *dev = fh->dev;
 878         int                rc;
 879
 880         rc = check_dev(dev);
 881         if (rc < 0)
 882                 return rc;
 883
 884         if (i >= MAX_EM28XX_INPUT)
 885                 return -EINVAL;
 886         if (0 == INPUT(i)->type)
 887                 return -EINVAL;
 888
 889         mutex_lock(&dev->lock);
 890
 891         video_mux(dev, i);
 892
 893         mutex_unlock(&dev->lock);
 894         return 0;
 895 }
 896
 897 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 898 {
 899         struct em28xx_fh   *fh    = priv;
 900         struct em28xx      *dev   = fh->dev;
 901
 902         switch (a->index) {
 903         case EM28XX_AMUX_VIDEO:
 904                 strcpy(a->name, "Television");
 905                 break;
 906         case EM28XX_AMUX_LINE_IN:
 907                 strcpy(a->name, "Line In");
 908                 break;
 909         case EM28XX_AMUX_VIDEO2:
 910                 strcpy(a->name, "Television alt");
 911                 break;
 912         case EM28XX_AMUX_PHONE:
 913                 strcpy(a->name, "Phone");
 914                 break;
 915         case EM28XX_AMUX_MIC:
 916                 strcpy(a->name, "Mic");
 917                 break;
 918         case EM28XX_AMUX_CD:
 919                 strcpy(a->name, "CD");
 920                 break;
 921         case EM28XX_AMUX_AUX:
 922                 strcpy(a->name, "Aux");
 923                 break;
 924         case EM28XX_AMUX_PCM_OUT:
 925                 strcpy(a->name, "PCM");
 926                 break;
 927         default:
 928                 return -EINVAL;
 929         }
 930
 931         a->index = dev->ctl_ainput;
 932         a->capability = V4L2_AUDCAP_STEREO;
 933
 934         return 0;
 935 }
 936
 937 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 938 {
 939         struct em28xx_fh   *fh  = priv;
 940         struct em28xx      *dev = fh->dev;
 941
 942         mutex_lock(&dev->lock);
 943
 944         dev->ctl_ainput = INPUT(a->index)->amux;
 945         dev->ctl_aoutput = INPUT(a->index)->aout;
 946
 947         if (!dev->ctl_aoutput)
 948                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 949
 950         mutex_unlock(&dev->lock);
 951         return 0;
 952 }
 953
 954 static int vidioc_queryctrl(struct file *file, void *priv,
 955                                 struct v4l2_queryctrl *qc)
 956 {
 957         struct em28xx_fh      *fh  = priv;
 958         struct em28xx         *dev = fh->dev;
 959         int                   id  = qc->id;
 960         int                   i;
 961         int                   rc;
 962
 963         rc = check_dev(dev);
 964         if (rc < 0)
 965                 return rc;
 966
 967         memset(qc, 0, sizeof(*qc));
 968
 969         qc->id = id;
 970
 971         if (!dev->board.has_msp34xx) {
 972                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
 973                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
 974                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
 975                                 return 0;
 976                         }
 977                 }
 978         }
 979         mutex_lock(&dev->lock);
 980         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
 981         mutex_unlock(&dev->lock);
 982
 983         if (qc->type)
 984                 return 0;
 985         else
 986                 return -EINVAL;
 987 }
 988
 989 static int vidioc_g_ctrl(struct file *file, void *priv,
 990                                 struct v4l2_control *ctrl)
 991 {
 992         struct em28xx_fh      *fh  = priv;
 993         struct em28xx         *dev = fh->dev;
 994         int                   rc;
 995
 996         rc = check_dev(dev);
 997         if (rc < 0)
 998                 return rc;
 999         rc = 0;
1000
1001         mutex_lock(&dev->lock);
1002
1003         if (dev->board.has_msp34xx)
1004                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1005         else
1006                 rc = em28xx_get_ctrl(dev, ctrl);
1007
1008         mutex_unlock(&dev->lock);
1009         return rc;
1010 }
1011
1012 static int vidioc_s_ctrl(struct file *file, void *priv,
1013                                 struct v4l2_control *ctrl)
1014 {
1015         struct em28xx_fh      *fh  = priv;
1016         struct em28xx         *dev = fh->dev;
1017         u8                    i;
1018         int                   rc;
1019
1020         rc = check_dev(dev);
1021         if (rc < 0)
1022                 return rc;
1023
1024         mutex_lock(&dev->lock);
1025
1026         if (dev->board.has_msp34xx)
1027                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1028         else {
1029                 rc = 1;
1030                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1031                         if (ctrl->id == em28xx_qctrl[i].id) {
1032                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1033                                     ctrl->value > em28xx_qctrl[i].maximum) {
1034                                         rc = -ERANGE;
1035                                         break;
1036                                 }
1037
1038                                 rc = em28xx_set_ctrl(dev, ctrl);
1039                                 break;
1040                         }
1041                 }
1042         }
1043
1044         /* Control not found - try to send it to the attached devices */
1045         if (rc == 1) {
1046                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1047                 rc = 0;
1048         }
1049
1050         mutex_unlock(&dev->lock);
1051         return rc;
1052 }
1053
1054 static int vidioc_g_tuner(struct file *file, void *priv,
1055                                 struct v4l2_tuner *t)
1056 {
1057         struct em28xx_fh      *fh  = priv;
1058         struct em28xx         *dev = fh->dev;
1059         int                   rc;
1060
1061         rc = check_dev(dev);
1062         if (rc < 0)
1063                 return rc;
1064
1065         if (0 != t->index)
1066                 return -EINVAL;
1067
1068         strcpy(t->name, "Tuner");
1069
1070         mutex_lock(&dev->lock);
1071
1072         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1073
1074         mutex_unlock(&dev->lock);
1075         return 0;
1076 }
1077
1078 static int vidioc_s_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         mutex_lock(&dev->lock);
1093
1094         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1095
1096         mutex_unlock(&dev->lock);
1097         return 0;
1098 }
1099
1100 static int vidioc_g_frequency(struct file *file, void *priv,
1101                                 struct v4l2_frequency *f)
1102 {
1103         struct em28xx_fh      *fh  = priv;
1104         struct em28xx         *dev = fh->dev;
1105
1106         mutex_lock(&dev->lock);
1107         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1108         f->frequency = dev->ctl_freq;
1109         mutex_unlock(&dev->lock);
1110
1111         return 0;
1112 }
1113
1114 static int vidioc_s_frequency(struct file *file, void *priv,
1115                                 struct v4l2_frequency *f)
1116 {
1117         struct em28xx_fh      *fh  = priv;
1118         struct em28xx         *dev = fh->dev;
1119         int                   rc;
1120
1121         rc = check_dev(dev);
1122         if (rc < 0)
1123                 return rc;
1124
1125         if (0 != f->tuner)
1126                 return -EINVAL;
1127
1128         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1129                 return -EINVAL;
1130         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1131                 return -EINVAL;
1132
1133         mutex_lock(&dev->lock);
1134
1135         dev->ctl_freq = f->frequency;
1136         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1137
1138         mutex_unlock(&dev->lock);
1139
1140         return 0;
1141 }
1142
1143 #ifdef CONFIG_VIDEO_ADV_DEBUG
1144 static int em28xx_reg_len(int reg)
1145 {
1146         switch (reg) {
1147         case EM28XX_R40_AC97LSB:
1148         case EM28XX_R30_HSCALELOW:
1149         case EM28XX_R32_VSCALELOW:
1150                 return 2;
1151         default:
1152                 return 1;
1153         }
1154 }
1155
1156 static int vidioc_g_chip_ident(struct file *file, void *priv,
1157                struct v4l2_chip_ident *chip)
1158 {
1159         struct em28xx_fh      *fh  = priv;
1160         struct em28xx         *dev = fh->dev;
1161
1162         chip->ident = V4L2_IDENT_NONE;
1163         chip->revision = 0;
1164
1165         em28xx_i2c_call_clients(dev, VIDIOC_G_CHIP_IDENT, chip);
1166
1167         return 0;
1168 }
1169
1170
1171 static int vidioc_g_register(struct file *file, void *priv,
1172                              struct v4l2_register *reg)
1173 {
1174         struct em28xx_fh      *fh  = priv;
1175         struct em28xx         *dev = fh->dev;
1176         int ret;
1177
1178         switch (reg->match_type) {
1179         case V4L2_CHIP_MATCH_AC97:
1180                 mutex_lock(&dev->lock);
1181                 ret = em28xx_read_ac97(dev, reg->reg);
1182                 mutex_unlock(&dev->lock);
1183                 if (ret < 0)
1184                         return ret;
1185
1186                 reg->val = ret;
1187                 return 0;
1188         case V4L2_CHIP_MATCH_I2C_DRIVER:
1189                 em28xx_i2c_call_clients(dev, VIDIOC_DBG_G_REGISTER, reg);
1190                 return 0;
1191         case V4L2_CHIP_MATCH_I2C_ADDR:
1192                 /* Not supported yet */
1193                 return -EINVAL;
1194         default:
1195                 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1196                         return -EINVAL;
1197         }
1198
1199         /* Match host */
1200         if (em28xx_reg_len(reg->reg) == 1) {
1201                 mutex_lock(&dev->lock);
1202                 ret = em28xx_read_reg(dev, reg->reg);
1203                 mutex_unlock(&dev->lock);
1204
1205                 if (ret < 0)
1206                         return ret;
1207
1208                 reg->val = ret;
1209         } else {
1210                 __le64 val = 0;
1211                 mutex_lock(&dev->lock);
1212                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1213                                                    reg->reg, (char *)&val, 2);
1214                 mutex_unlock(&dev->lock);
1215                 if (ret < 0)
1216                         return ret;
1217
1218                 reg->val = le64_to_cpu(val);
1219         }
1220
1221         return 0;
1222 }
1223
1224 static int vidioc_s_register(struct file *file, void *priv,
1225                              struct v4l2_register *reg)
1226 {
1227         struct em28xx_fh      *fh  = priv;
1228         struct em28xx         *dev = fh->dev;
1229         __le64 buf;
1230         int    rc;
1231
1232         switch (reg->match_type) {
1233         case V4L2_CHIP_MATCH_AC97:
1234                 mutex_lock(&dev->lock);
1235                 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1236                 mutex_unlock(&dev->lock);
1237
1238                 return rc;
1239         case V4L2_CHIP_MATCH_I2C_DRIVER:
1240                 em28xx_i2c_call_clients(dev, VIDIOC_DBG_S_REGISTER, reg);
1241                 return 0;
1242         case V4L2_CHIP_MATCH_I2C_ADDR:
1243                 /* Not supported yet */
1244                 return -EINVAL;
1245         default:
1246                 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1247                         return -EINVAL;
1248         }
1249
1250         /* Match host */
1251         buf = cpu_to_le64(reg->val);
1252
1253         mutex_lock(&dev->lock);
1254         rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1255                                em28xx_reg_len(reg->reg));
1256         mutex_unlock(&dev->lock);
1257
1258         return rc;
1259 }
1260 #endif
1261
1262
1263 static int vidioc_cropcap(struct file *file, void *priv,
1264                                         struct v4l2_cropcap *cc)
1265 {
1266         struct em28xx_fh      *fh  = priv;
1267         struct em28xx         *dev = fh->dev;
1268
1269         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1270                 return -EINVAL;
1271
1272         cc->bounds.left = 0;
1273         cc->bounds.top = 0;
1274         cc->bounds.width = dev->width;
1275         cc->bounds.height = dev->height;
1276         cc->defrect = cc->bounds;
1277         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1278         cc->pixelaspect.denominator = 59;
1279
1280         return 0;
1281 }
1282
1283 static int vidioc_streamon(struct file *file, void *priv,
1284                                         enum v4l2_buf_type type)
1285 {
1286         struct em28xx_fh      *fh  = priv;
1287         struct em28xx         *dev = fh->dev;
1288         int                   rc;
1289
1290         rc = check_dev(dev);
1291         if (rc < 0)
1292                 return rc;
1293
1294
1295         mutex_lock(&dev->lock);
1296         rc = res_get(fh);
1297
1298         if (likely(rc >= 0))
1299                 rc = videobuf_streamon(&fh->vb_vidq);
1300
1301         mutex_unlock(&dev->lock);
1302
1303         return rc;
1304 }
1305
1306 static int vidioc_streamoff(struct file *file, void *priv,
1307                                         enum v4l2_buf_type type)
1308 {
1309         struct em28xx_fh      *fh  = priv;
1310         struct em28xx         *dev = fh->dev;
1311         int                   rc;
1312
1313         rc = check_dev(dev);
1314         if (rc < 0)
1315                 return rc;
1316
1317         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1318                 return -EINVAL;
1319         if (type != fh->type)
1320                 return -EINVAL;
1321
1322         mutex_lock(&dev->lock);
1323
1324         videobuf_streamoff(&fh->vb_vidq);
1325         res_free(fh);
1326
1327         mutex_unlock(&dev->lock);
1328
1329         return 0;
1330 }
1331
1332 static int vidioc_querycap(struct file *file, void  *priv,
1333                                         struct v4l2_capability *cap)
1334 {
1335         struct em28xx_fh      *fh  = priv;
1336         struct em28xx         *dev = fh->dev;
1337
1338         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1339         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1340         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1341
1342         cap->version = EM28XX_VERSION_CODE;
1343
1344         cap->capabilities =
1345                         V4L2_CAP_SLICED_VBI_CAPTURE |
1346                         V4L2_CAP_VIDEO_CAPTURE |
1347                         V4L2_CAP_AUDIO |
1348                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1349
1350         if (dev->tuner_type != TUNER_ABSENT)
1351                 cap->capabilities |= V4L2_CAP_TUNER;
1352
1353         return 0;
1354 }
1355
1356 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1357                                         struct v4l2_fmtdesc *f)
1358 {
1359         if (unlikely(f->index >= ARRAY_SIZE(format)))
1360                 return -EINVAL;
1361
1362         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1363         f->pixelformat = format[f->index].fourcc;
1364
1365         return 0;
1366 }
1367
1368 /* Sliced VBI ioctls */
1369 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1370                                         struct v4l2_format *f)
1371 {
1372         struct em28xx_fh      *fh  = priv;
1373         struct em28xx         *dev = fh->dev;
1374         int                   rc;
1375
1376         rc = check_dev(dev);
1377         if (rc < 0)
1378                 return rc;
1379
1380         mutex_lock(&dev->lock);
1381
1382         f->fmt.sliced.service_set = 0;
1383
1384         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1385
1386         if (f->fmt.sliced.service_set == 0)
1387                 rc = -EINVAL;
1388
1389         mutex_unlock(&dev->lock);
1390         return rc;
1391 }
1392
1393 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1394                         struct v4l2_format *f)
1395 {
1396         struct em28xx_fh      *fh  = priv;
1397         struct em28xx         *dev = fh->dev;
1398         int                   rc;
1399
1400         rc = check_dev(dev);
1401         if (rc < 0)
1402                 return rc;
1403
1404         mutex_lock(&dev->lock);
1405         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1406         mutex_unlock(&dev->lock);
1407
1408         if (f->fmt.sliced.service_set == 0)
1409                 return -EINVAL;
1410
1411         return 0;
1412 }
1413
1414
1415 static int vidioc_reqbufs(struct file *file, void *priv,
1416                           struct v4l2_requestbuffers *rb)
1417 {
1418         struct em28xx_fh      *fh  = priv;
1419         struct em28xx         *dev = fh->dev;
1420         int                   rc;
1421
1422         rc = check_dev(dev);
1423         if (rc < 0)
1424                 return rc;
1425
1426         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1427 }
1428
1429 static int vidioc_querybuf(struct file *file, void *priv,
1430                            struct v4l2_buffer *b)
1431 {
1432         struct em28xx_fh      *fh  = priv;
1433         struct em28xx         *dev = fh->dev;
1434         int                   rc;
1435
1436         rc = check_dev(dev);
1437         if (rc < 0)
1438                 return rc;
1439
1440         return (videobuf_querybuf(&fh->vb_vidq, b));
1441 }
1442
1443 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1444 {
1445         struct em28xx_fh      *fh  = priv;
1446         struct em28xx         *dev = fh->dev;
1447         int                   rc;
1448
1449         rc = check_dev(dev);
1450         if (rc < 0)
1451                 return rc;
1452
1453         return (videobuf_qbuf(&fh->vb_vidq, b));
1454 }
1455
1456 static int vidioc_dqbuf(struct file *file, void *priv, 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_dqbuf(&fh->vb_vidq, b,
1467                                 file->f_flags & O_NONBLOCK));
1468 }
1469
1470 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1471 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1472 {
1473         struct em28xx_fh  *fh = priv;
1474
1475         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1476 }
1477 #endif
1478
1479
1480 /* ----------------------------------------------------------- */
1481 /* RADIO ESPECIFIC IOCTLS                                      */
1482 /* ----------------------------------------------------------- */
1483
1484 static int radio_querycap(struct file *file, void  *priv,
1485                           struct v4l2_capability *cap)
1486 {
1487         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1488
1489         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1490         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1491         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1492
1493         cap->version = EM28XX_VERSION_CODE;
1494         cap->capabilities = V4L2_CAP_TUNER;
1495         return 0;
1496 }
1497
1498 static int radio_g_tuner(struct file *file, void *priv,
1499                          struct v4l2_tuner *t)
1500 {
1501         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1502
1503         if (unlikely(t->index > 0))
1504                 return -EINVAL;
1505
1506         strcpy(t->name, "Radio");
1507         t->type = V4L2_TUNER_RADIO;
1508
1509         mutex_lock(&dev->lock);
1510         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1511         mutex_unlock(&dev->lock);
1512
1513         return 0;
1514 }
1515
1516 static int radio_enum_input(struct file *file, void *priv,
1517                             struct v4l2_input *i)
1518 {
1519         if (i->index != 0)
1520                 return -EINVAL;
1521         strcpy(i->name, "Radio");
1522         i->type = V4L2_INPUT_TYPE_TUNER;
1523
1524         return 0;
1525 }
1526
1527 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1528 {
1529         if (unlikely(a->index))
1530                 return -EINVAL;
1531
1532         strcpy(a->name, "Radio");
1533         return 0;
1534 }
1535
1536 static int radio_s_tuner(struct file *file, void *priv,
1537                          struct v4l2_tuner *t)
1538 {
1539         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1540
1541         if (0 != t->index)
1542                 return -EINVAL;
1543
1544         mutex_lock(&dev->lock);
1545         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1546         mutex_unlock(&dev->lock);
1547
1548         return 0;
1549 }
1550
1551 static int radio_s_audio(struct file *file, void *fh,
1552                          struct v4l2_audio *a)
1553 {
1554         return 0;
1555 }
1556
1557 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1558 {
1559         return 0;
1560 }
1561
1562 static int radio_queryctrl(struct file *file, void *priv,
1563                            struct v4l2_queryctrl *qc)
1564 {
1565         int i;
1566
1567         if (qc->id <  V4L2_CID_BASE ||
1568                 qc->id >= V4L2_CID_LASTP1)
1569                 return -EINVAL;
1570
1571         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1572                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1573                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1574                         return 0;
1575                 }
1576         }
1577
1578         return -EINVAL;
1579 }
1580
1581 /*
1582  * em28xx_v4l2_open()
1583  * inits the device and starts isoc transfer
1584  */
1585 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1586 {
1587         int minor = iminor(inode);
1588         int errCode = 0, radio;
1589         struct em28xx *dev;
1590         enum v4l2_buf_type fh_type;
1591         struct em28xx_fh *fh;
1592
1593         dev = em28xx_get_device(inode, &fh_type, &radio);
1594
1595         if (NULL == dev)
1596                 return -ENODEV;
1597
1598         mutex_lock(&dev->lock);
1599
1600         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1601                                 minor, v4l2_type_names[fh_type], dev->users);
1602
1603
1604         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1605         if (!fh) {
1606                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1607                 mutex_unlock(&dev->lock);
1608                 return -ENOMEM;
1609         }
1610         fh->dev = dev;
1611         fh->radio = radio;
1612         fh->type = fh_type;
1613         filp->private_data = fh;
1614
1615         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1616                 dev->width = norm_maxw(dev);
1617                 dev->height = norm_maxh(dev);
1618                 dev->hscale = 0;
1619                 dev->vscale = 0;
1620
1621                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1622                 em28xx_set_alternate(dev);
1623                 em28xx_resolution_set(dev);
1624
1625                 /* Needed, since GPIO might have disabled power of
1626                    some i2c device
1627                  */
1628                 em28xx_wake_i2c(dev);
1629
1630         }
1631         if (fh->radio) {
1632                 em28xx_videodbg("video_open: setting radio device\n");
1633                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1634         }
1635
1636         dev->users++;
1637
1638         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1639                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1640                         sizeof(struct em28xx_buffer), fh);
1641
1642         mutex_unlock(&dev->lock);
1643
1644         return errCode;
1645 }
1646
1647 /*
1648  * em28xx_realease_resources()
1649  * unregisters the v4l2,i2c and usb devices
1650  * called when the device gets disconected or at module unload
1651 */
1652 void em28xx_release_analog_resources(struct em28xx *dev)
1653 {
1654
1655         /*FIXME: I2C IR should be disconnected */
1656
1657         if (dev->radio_dev) {
1658                 if (-1 != dev->radio_dev->minor)
1659                         video_unregister_device(dev->radio_dev);
1660                 else
1661                         video_device_release(dev->radio_dev);
1662                 dev->radio_dev = NULL;
1663         }
1664         if (dev->vbi_dev) {
1665                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
1666                             dev->vbi_dev->num);
1667                 if (-1 != dev->vbi_dev->minor)
1668                         video_unregister_device(dev->vbi_dev);
1669                 else
1670                         video_device_release(dev->vbi_dev);
1671                 dev->vbi_dev = NULL;
1672         }
1673         if (dev->vdev) {
1674                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
1675                             dev->vdev->num);
1676                 if (-1 != dev->vdev->minor)
1677                         video_unregister_device(dev->vdev);
1678                 else
1679                         video_device_release(dev->vdev);
1680                 dev->vdev = NULL;
1681         }
1682 }
1683
1684 /*
1685  * em28xx_v4l2_close()
1686  * stops streaming and deallocates all resources allocated by the v4l2
1687  * calls and ioctls
1688  */
1689 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1690 {
1691         struct em28xx_fh *fh  = filp->private_data;
1692         struct em28xx    *dev = fh->dev;
1693         int              errCode;
1694
1695         em28xx_videodbg("users=%d\n", dev->users);
1696
1697
1698         mutex_lock(&dev->lock);
1699         if (res_check(fh))
1700                 res_free(fh);
1701
1702         if (dev->users == 1) {
1703                 videobuf_stop(&fh->vb_vidq);
1704                 videobuf_mmap_free(&fh->vb_vidq);
1705
1706                 /* the device is already disconnect,
1707                    free the remaining resources */
1708                 if (dev->state & DEV_DISCONNECTED) {
1709                         em28xx_release_resources(dev);
1710                         mutex_unlock(&dev->lock);
1711                         kfree(dev);
1712                         return 0;
1713                 }
1714
1715                 /* Save some power by putting tuner to sleep */
1716                 em28xx_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL);
1717
1718                 /* do this before setting alternate! */
1719                 em28xx_uninit_isoc(dev);
1720                 em28xx_set_mode(dev, EM28XX_SUSPEND);
1721
1722                 /* set alternate 0 */
1723                 dev->alt = 0;
1724                 em28xx_videodbg("setting alternate 0\n");
1725                 errCode = usb_set_interface(dev->udev, 0, 0);
1726                 if (errCode < 0) {
1727                         em28xx_errdev("cannot change alternate number to "
1728                                         "0 (error=%i)\n", errCode);
1729                 }
1730         }
1731         kfree(fh);
1732         dev->users--;
1733         wake_up_interruptible_nr(&dev->open, 1);
1734         mutex_unlock(&dev->lock);
1735         return 0;
1736 }
1737
1738 /*
1739  * em28xx_v4l2_read()
1740  * will allocate buffers when called for the first time
1741  */
1742 static ssize_t
1743 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1744                  loff_t *pos)
1745 {
1746         struct em28xx_fh *fh = filp->private_data;
1747         struct em28xx *dev = fh->dev;
1748         int rc;
1749
1750         rc = check_dev(dev);
1751         if (rc < 0)
1752                 return rc;
1753
1754         /* FIXME: read() is not prepared to allow changing the video
1755            resolution while streaming. Seems a bug at em28xx_set_fmt
1756          */
1757
1758         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1759                 mutex_lock(&dev->lock);
1760                 rc = res_get(fh);
1761                 mutex_unlock(&dev->lock);
1762
1763                 if (unlikely(rc < 0))
1764                         return rc;
1765
1766                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1767                                         filp->f_flags & O_NONBLOCK);
1768         }
1769         return 0;
1770 }
1771
1772 /*
1773  * em28xx_v4l2_poll()
1774  * will allocate buffers when called for the first time
1775  */
1776 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1777 {
1778         struct em28xx_fh *fh = filp->private_data;
1779         struct em28xx *dev = fh->dev;
1780         int rc;
1781
1782         rc = check_dev(dev);
1783         if (rc < 0)
1784                 return rc;
1785
1786         mutex_lock(&dev->lock);
1787         rc = res_get(fh);
1788         mutex_unlock(&dev->lock);
1789
1790         if (unlikely(rc < 0))
1791                 return POLLERR;
1792
1793         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1794                 return POLLERR;
1795
1796         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1797 }
1798
1799 /*
1800  * em28xx_v4l2_mmap()
1801  */
1802 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1803 {
1804         struct em28xx_fh *fh    = filp->private_data;
1805         struct em28xx    *dev   = fh->dev;
1806         int              rc;
1807
1808         rc = check_dev(dev);
1809         if (rc < 0)
1810                 return rc;
1811
1812         mutex_lock(&dev->lock);
1813         rc = res_get(fh);
1814         mutex_unlock(&dev->lock);
1815
1816         if (unlikely(rc < 0))
1817                 return rc;
1818
1819         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1820
1821         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1822                 (unsigned long)vma->vm_start,
1823                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1824                 rc);
1825
1826         return rc;
1827 }
1828
1829 static const struct file_operations em28xx_v4l_fops = {
1830         .owner         = THIS_MODULE,
1831         .open          = em28xx_v4l2_open,
1832         .release       = em28xx_v4l2_close,
1833         .read          = em28xx_v4l2_read,
1834         .poll          = em28xx_v4l2_poll,
1835         .mmap          = em28xx_v4l2_mmap,
1836         .ioctl         = video_ioctl2,
1837         .llseek        = no_llseek,
1838         .compat_ioctl  = v4l_compat_ioctl32,
1839 };
1840
1841 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1842         .vidioc_querycap            = vidioc_querycap,
1843         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1844         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1845         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1846         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1847         .vidioc_g_audio             = vidioc_g_audio,
1848         .vidioc_s_audio             = vidioc_s_audio,
1849         .vidioc_cropcap             = vidioc_cropcap,
1850
1851         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1852         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1853         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1854
1855         .vidioc_reqbufs             = vidioc_reqbufs,
1856         .vidioc_querybuf            = vidioc_querybuf,
1857         .vidioc_qbuf                = vidioc_qbuf,
1858         .vidioc_dqbuf               = vidioc_dqbuf,
1859         .vidioc_s_std               = vidioc_s_std,
1860         .vidioc_enum_input          = vidioc_enum_input,
1861         .vidioc_g_input             = vidioc_g_input,
1862         .vidioc_s_input             = vidioc_s_input,
1863         .vidioc_queryctrl           = vidioc_queryctrl,
1864         .vidioc_g_ctrl              = vidioc_g_ctrl,
1865         .vidioc_s_ctrl              = vidioc_s_ctrl,
1866         .vidioc_streamon            = vidioc_streamon,
1867         .vidioc_streamoff           = vidioc_streamoff,
1868         .vidioc_g_tuner             = vidioc_g_tuner,
1869         .vidioc_s_tuner             = vidioc_s_tuner,
1870         .vidioc_g_frequency         = vidioc_g_frequency,
1871         .vidioc_s_frequency         = vidioc_s_frequency,
1872 #ifdef CONFIG_VIDEO_ADV_DEBUG
1873         .vidioc_g_register          = vidioc_g_register,
1874         .vidioc_s_register          = vidioc_s_register,
1875         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
1876 #endif
1877 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1878         .vidiocgmbuf                = vidiocgmbuf,
1879 #endif
1880 };
1881
1882 static const struct video_device em28xx_video_template = {
1883         .fops                       = &em28xx_v4l_fops,
1884         .release                    = video_device_release,
1885         .ioctl_ops                  = &video_ioctl_ops,
1886
1887         .minor                      = -1,
1888
1889         .tvnorms                    = V4L2_STD_ALL,
1890         .current_norm               = V4L2_STD_PAL,
1891 };
1892
1893 static const struct file_operations radio_fops = {
1894         .owner         = THIS_MODULE,
1895         .open          = em28xx_v4l2_open,
1896         .release       = em28xx_v4l2_close,
1897         .ioctl         = video_ioctl2,
1898         .compat_ioctl  = v4l_compat_ioctl32,
1899         .llseek        = no_llseek,
1900 };
1901
1902 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1903         .vidioc_querycap      = radio_querycap,
1904         .vidioc_g_tuner       = radio_g_tuner,
1905         .vidioc_enum_input    = radio_enum_input,
1906         .vidioc_g_audio       = radio_g_audio,
1907         .vidioc_s_tuner       = radio_s_tuner,
1908         .vidioc_s_audio       = radio_s_audio,
1909         .vidioc_s_input       = radio_s_input,
1910         .vidioc_queryctrl     = radio_queryctrl,
1911         .vidioc_g_ctrl        = vidioc_g_ctrl,
1912         .vidioc_s_ctrl        = vidioc_s_ctrl,
1913         .vidioc_g_frequency   = vidioc_g_frequency,
1914         .vidioc_s_frequency   = vidioc_s_frequency,
1915 #ifdef CONFIG_VIDEO_ADV_DEBUG
1916         .vidioc_g_register    = vidioc_g_register,
1917         .vidioc_s_register    = vidioc_s_register,
1918 #endif
1919 };
1920
1921 static struct video_device em28xx_radio_template = {
1922         .name                 = "em28xx-radio",
1923         .fops                 = &radio_fops,
1924         .ioctl_ops            = &radio_ioctl_ops,
1925         .minor                = -1,
1926 };
1927
1928 /******************************** usb interface ******************************/
1929
1930
1931
1932 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1933                                              const struct video_device *template,
1934                                              const char *type_name)
1935 {
1936         struct video_device *vfd;
1937
1938         vfd = video_device_alloc();
1939         if (NULL == vfd)
1940                 return NULL;
1941         *vfd = *template;
1942         vfd->minor   = -1;
1943         vfd->parent = &dev->udev->dev;
1944         vfd->release = video_device_release;
1945         vfd->debug = video_debug;
1946
1947         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1948                  dev->name, type_name);
1949
1950         return vfd;
1951 }
1952
1953 int em28xx_register_analog_devices(struct em28xx *dev)
1954 {
1955         int ret;
1956
1957         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
1958                 dev->name,
1959                 (EM28XX_VERSION_CODE >> 16) & 0xff,
1960                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1961
1962         /* Analog specific initialization */
1963         dev->format = &format[0];
1964         video_mux(dev, 0);
1965
1966         /* enable vbi capturing */
1967
1968 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
1969 /*      em28xx_write_reg(dev, EM28XX_R0F_XCLK, 0x80); clk register */
1970         em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x51);
1971
1972         dev->mute = 1;          /* maybe not the right place... */
1973         dev->volume = 0x1f;
1974
1975         em28xx_set_outfmt(dev);
1976         em28xx_colorlevels_set_default(dev);
1977         em28xx_compression_disable(dev);
1978
1979         /* set default norm */
1980         dev->norm = em28xx_video_template.current_norm;
1981         dev->width = norm_maxw(dev);
1982         dev->height = norm_maxh(dev);
1983         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1984         dev->hscale = 0;
1985         dev->vscale = 0;
1986
1987         /* FIXME: This is a very bad hack! Not all devices have TV on input 2 */
1988         dev->ctl_input = 2;
1989
1990         /* allocate and fill video video_device struct */
1991         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1992         if (!dev->vdev) {
1993                 em28xx_errdev("cannot allocate video_device.\n");
1994                 return -ENODEV;
1995         }
1996
1997         /* register v4l2 video video_device */
1998         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1999                                        video_nr[dev->devno]);
2000         if (ret) {
2001                 em28xx_errdev("unable to register video device (error=%i).\n",
2002                               ret);
2003                 return ret;
2004         }
2005
2006         /* Allocate and fill vbi video_device struct */
2007         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
2008
2009         /* register v4l2 vbi video_device */
2010         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2011                                         vbi_nr[dev->devno]);
2012         if (ret < 0) {
2013                 em28xx_errdev("unable to register vbi device\n");
2014                 return ret;
2015         }
2016
2017         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2018                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
2019                 if (!dev->radio_dev) {
2020                         em28xx_errdev("cannot allocate video_device.\n");
2021                         return -ENODEV;
2022                 }
2023                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2024                                             radio_nr[dev->devno]);
2025                 if (ret < 0) {
2026                         em28xx_errdev("can't register radio device\n");
2027                         return ret;
2028                 }
2029                 em28xx_info("Registered radio device as /dev/radio%d\n",
2030                             dev->radio_dev->num);
2031         }
2032
2033         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2034                                 dev->vdev->num, dev->vbi_dev->num);
2035
2036         return 0;
2037 }