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 #include <linux/slab.h>
  39
  40 #include "em28xx.h"
  41 #include <media/v4l2-common.h>
  42 #include <media/v4l2-ioctl.h>
  43 #include <media/v4l2-chip-ident.h>
  44 #include <media/msp3400.h>
  45 #include <media/tuner.h>
  46
  47 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  48                       "Markus Rechberger <mrechberger@gmail.com>, " \
  49                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  50                       "Sascha Sommer <saschasommer@freenet.de>"
  51
  52 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  53 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 2)
  54
  55 #define em28xx_videodbg(fmt, arg...) do {\
  56         if (video_debug) \
  57                 printk(KERN_INFO "%s %s :"fmt, \
  58                          dev->name, __func__ , ##arg); } while (0)
  59
  60 static unsigned int isoc_debug;
  61 module_param(isoc_debug, int, 0644);
  62 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  63
  64 #define em28xx_isocdbg(fmt, arg...) \
  65 do {\
  66         if (isoc_debug) { \
  67                 printk(KERN_INFO "%s %s :"fmt, \
  68                          dev->name, __func__ , ##arg); \
  69         } \
  70   } while (0)
  71
  72 MODULE_AUTHOR(DRIVER_AUTHOR);
  73 MODULE_DESCRIPTION(DRIVER_DESC);
  74 MODULE_LICENSE("GPL");
  75
  76 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  77 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79
  80 module_param_array(video_nr, int, NULL, 0444);
  81 module_param_array(vbi_nr, int, NULL, 0444);
  82 module_param_array(radio_nr, int, NULL, 0444);
  83 MODULE_PARM_DESC(video_nr, "video device numbers");
  84 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  85 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  86
  87 static unsigned int video_debug;
  88 module_param(video_debug, int, 0644);
  89 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  90
  91 /* supported video standards */
  92 static struct em28xx_fmt format[] = {
  93         {
  94                 .name     = "16 bpp YUY2, 4:2:2, packed",
  95                 .fourcc   = V4L2_PIX_FMT_YUYV,
  96                 .depth    = 16,
  97                 .reg      = EM28XX_OUTFMT_YUV422_Y0UY1V,
  98         }, {
  99                 .name     = "16 bpp RGB 565, LE",
 100                 .fourcc   = V4L2_PIX_FMT_RGB565,
 101                 .depth    = 16,
 102                 .reg      = EM28XX_OUTFMT_RGB_16_656,
 103         }, {
 104                 .name     = "8 bpp Bayer BGBG..GRGR",
 105                 .fourcc   = V4L2_PIX_FMT_SBGGR8,
 106                 .depth    = 8,
 107                 .reg      = EM28XX_OUTFMT_RGB_8_BGBG,
 108         }, {
 109                 .name     = "8 bpp Bayer GRGR..BGBG",
 110                 .fourcc   = V4L2_PIX_FMT_SGRBG8,
 111                 .depth    = 8,
 112                 .reg      = EM28XX_OUTFMT_RGB_8_GRGR,
 113         }, {
 114                 .name     = "8 bpp Bayer GBGB..RGRG",
 115                 .fourcc   = V4L2_PIX_FMT_SGBRG8,
 116                 .depth    = 8,
 117                 .reg      = EM28XX_OUTFMT_RGB_8_GBGB,
 118         }, {
 119                 .name     = "12 bpp YUV411",
 120                 .fourcc   = V4L2_PIX_FMT_YUV411P,
 121                 .depth    = 12,
 122                 .reg      = EM28XX_OUTFMT_YUV411,
 123         },
 124 };
 125
 126 /* supported controls */
 127 /* Common to all boards */
 128 static struct v4l2_queryctrl ac97_qctrl[] = {
 129         {
 130                 .id = V4L2_CID_AUDIO_VOLUME,
 131                 .type = V4L2_CTRL_TYPE_INTEGER,
 132                 .name = "Volume",
 133                 .minimum = 0x0,
 134                 .maximum = 0x1f,
 135                 .step = 0x1,
 136                 .default_value = 0x1f,
 137                 .flags = V4L2_CTRL_FLAG_SLIDER,
 138         }, {
 139                 .id = V4L2_CID_AUDIO_MUTE,
 140                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 141                 .name = "Mute",
 142                 .minimum = 0,
 143                 .maximum = 1,
 144                 .step = 1,
 145                 .default_value = 1,
 146                 .flags = 0,
 147         }
 148 };
 149
 150 /* ------------------------------------------------------------------
 151         DMA and thread functions
 152    ------------------------------------------------------------------*/
 153
 154 /*
 155  * Announces that a buffer were filled and request the next
 156  */
 157 static inline void buffer_filled(struct em28xx *dev,
 158                                   struct em28xx_dmaqueue *dma_q,
 159                                   struct em28xx_buffer *buf)
 160 {
 161         /* Advice that buffer was filled */
 162         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 163         buf->vb.state = VIDEOBUF_DONE;
 164         buf->vb.field_count++;
 165         do_gettimeofday(&buf->vb.ts);
 166
 167         dev->isoc_ctl.vid_buf = NULL;
 168
 169         list_del(&buf->vb.queue);
 170         wake_up(&buf->vb.done);
 171 }
 172
 173 static inline void vbi_buffer_filled(struct em28xx *dev,
 174                                      struct em28xx_dmaqueue *dma_q,
 175                                      struct em28xx_buffer *buf)
 176 {
 177         /* Advice that buffer was filled */
 178         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 179
 180         buf->vb.state = VIDEOBUF_DONE;
 181         buf->vb.field_count++;
 182         do_gettimeofday(&buf->vb.ts);
 183
 184         dev->isoc_ctl.vbi_buf = NULL;
 185
 186         list_del(&buf->vb.queue);
 187         wake_up(&buf->vb.done);
 188 }
 189
 190 /*
 191  * Identify the buffer header type and properly handles
 192  */
 193 static void em28xx_copy_video(struct em28xx *dev,
 194                               struct em28xx_dmaqueue  *dma_q,
 195                               struct em28xx_buffer *buf,
 196                               unsigned char *p,
 197                               unsigned char *outp, unsigned long len)
 198 {
 199         void *fieldstart, *startwrite, *startread;
 200         int  linesdone, currlinedone, offset, lencopy, remain;
 201         int bytesperline = dev->width << 1;
 202
 203         if (dma_q->pos + len > buf->vb.size)
 204                 len = buf->vb.size - dma_q->pos;
 205
 206         startread = p;
 207         remain = len;
 208
 209         if (dev->progressive)
 210                 fieldstart = outp;
 211         else {
 212                 /* Interlaces two half frames */
 213                 if (buf->top_field)
 214                         fieldstart = outp;
 215                 else
 216                         fieldstart = outp + bytesperline;
 217         }
 218
 219         linesdone = dma_q->pos / bytesperline;
 220         currlinedone = dma_q->pos % bytesperline;
 221
 222         if (dev->progressive)
 223                 offset = linesdone * bytesperline + currlinedone;
 224         else
 225                 offset = linesdone * bytesperline * 2 + currlinedone;
 226
 227         startwrite = fieldstart + offset;
 228         lencopy = bytesperline - currlinedone;
 229         lencopy = lencopy > remain ? remain : lencopy;
 230
 231         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 232                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 233                                ((char *)startwrite + lencopy) -
 234                                ((char *)outp + buf->vb.size));
 235                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
 236                 lencopy = remain;
 237         }
 238         if (lencopy <= 0)
 239                 return;
 240         memcpy(startwrite, startread, lencopy);
 241
 242         remain -= lencopy;
 243
 244         while (remain > 0) {
 245                 startwrite += lencopy + bytesperline;
 246                 startread += lencopy;
 247                 if (bytesperline > remain)
 248                         lencopy = remain;
 249                 else
 250                         lencopy = bytesperline;
 251
 252                 if ((char *)startwrite + lencopy > (char *)outp +
 253                     buf->vb.size) {
 254                         em28xx_isocdbg("Overflow of %zi bytes past buffer end"
 255                                        "(2)\n",
 256                                        ((char *)startwrite + lencopy) -
 257                                        ((char *)outp + buf->vb.size));
 258                         lencopy = remain = (char *)outp + buf->vb.size -
 259                                            (char *)startwrite;
 260                 }
 261                 if (lencopy <= 0)
 262                         break;
 263
 264                 memcpy(startwrite, startread, lencopy);
 265
 266                 remain -= lencopy;
 267         }
 268
 269         dma_q->pos += len;
 270 }
 271
 272 static void em28xx_copy_vbi(struct em28xx *dev,
 273                               struct em28xx_dmaqueue  *dma_q,
 274                               struct em28xx_buffer *buf,
 275                               unsigned char *p,
 276                               unsigned char *outp, unsigned long len)
 277 {
 278         void *startwrite, *startread;
 279         int  offset;
 280         int bytesperline = dev->vbi_width;
 281
 282         if (dev == NULL) {
 283                 em28xx_isocdbg("dev is null\n");
 284                 return;
 285         }
 286
 287         if (dma_q == NULL) {
 288                 em28xx_isocdbg("dma_q is null\n");
 289                 return;
 290         }
 291         if (buf == NULL) {
 292                 return;
 293         }
 294         if (p == NULL) {
 295                 em28xx_isocdbg("p is null\n");
 296                 return;
 297         }
 298         if (outp == NULL) {
 299                 em28xx_isocdbg("outp is null\n");
 300                 return;
 301         }
 302
 303         if (dma_q->pos + len > buf->vb.size)
 304                 len = buf->vb.size - dma_q->pos;
 305
 306         startread = p;
 307
 308         startwrite = outp + dma_q->pos;
 309         offset = dma_q->pos;
 310
 311         /* Make sure the bottom field populates the second half of the frame */
 312         if (buf->top_field == 0) {
 313                 startwrite += bytesperline * dev->vbi_height;
 314                 offset += bytesperline * dev->vbi_height;
 315         }
 316
 317         memcpy(startwrite, startread, len);
 318         dma_q->pos += len;
 319 }
 320
 321 static inline void print_err_status(struct em28xx *dev,
 322                                      int packet, int status)
 323 {
 324         char *errmsg = "Unknown";
 325
 326         switch (status) {
 327         case -ENOENT:
 328                 errmsg = "unlinked synchronuously";
 329                 break;
 330         case -ECONNRESET:
 331                 errmsg = "unlinked asynchronuously";
 332                 break;
 333         case -ENOSR:
 334                 errmsg = "Buffer error (overrun)";
 335                 break;
 336         case -EPIPE:
 337                 errmsg = "Stalled (device not responding)";
 338                 break;
 339         case -EOVERFLOW:
 340                 errmsg = "Babble (bad cable?)";
 341                 break;
 342         case -EPROTO:
 343                 errmsg = "Bit-stuff error (bad cable?)";
 344                 break;
 345         case -EILSEQ:
 346                 errmsg = "CRC/Timeout (could be anything)";
 347                 break;
 348         case -ETIME:
 349                 errmsg = "Device does not respond";
 350                 break;
 351         }
 352         if (packet < 0) {
 353                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 354         } else {
 355                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 356                                packet, status, errmsg);
 357         }
 358 }
 359
 360 /*
 361  * video-buf generic routine to get the next available buffer
 362  */
 363 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 364                                           struct em28xx_buffer **buf)
 365 {
 366         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 367         char *outp;
 368
 369         if (list_empty(&dma_q->active)) {
 370                 em28xx_isocdbg("No active queue to serve\n");
 371                 dev->isoc_ctl.vid_buf = NULL;
 372                 *buf = NULL;
 373                 return;
 374         }
 375
 376         /* Get the next buffer */
 377         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 378
 379         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 380         outp = videobuf_to_vmalloc(&(*buf)->vb);
 381         memset(outp, 0, (*buf)->vb.size);
 382
 383         dev->isoc_ctl.vid_buf = *buf;
 384
 385         return;
 386 }
 387
 388 /*
 389  * video-buf generic routine to get the next available VBI buffer
 390  */
 391 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 392                                     struct em28xx_buffer **buf)
 393 {
 394         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 395         char *outp;
 396
 397         if (list_empty(&dma_q->active)) {
 398                 em28xx_isocdbg("No active queue to serve\n");
 399                 dev->isoc_ctl.vbi_buf = NULL;
 400                 *buf = NULL;
 401                 return;
 402         }
 403
 404         /* Get the next buffer */
 405         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 406         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 407         outp = videobuf_to_vmalloc(&(*buf)->vb);
 408         memset(outp, 0x00, (*buf)->vb.size);
 409
 410         dev->isoc_ctl.vbi_buf = *buf;
 411
 412         return;
 413 }
 414
 415 /*
 416  * Controls the isoc copy of each urb packet
 417  */
 418 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 419 {
 420         struct em28xx_buffer    *buf;
 421         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 422         unsigned char *outp = NULL;
 423         int i, len = 0, rc = 1;
 424         unsigned char *p;
 425
 426         if (!dev)
 427                 return 0;
 428
 429         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 430                 return 0;
 431
 432         if (urb->status < 0) {
 433                 print_err_status(dev, -1, urb->status);
 434                 if (urb->status == -ENOENT)
 435                         return 0;
 436         }
 437
 438         buf = dev->isoc_ctl.vid_buf;
 439         if (buf != NULL)
 440                 outp = videobuf_to_vmalloc(&buf->vb);
 441
 442         for (i = 0; i < urb->number_of_packets; i++) {
 443                 int status = urb->iso_frame_desc[i].status;
 444
 445                 if (status < 0) {
 446                         print_err_status(dev, i, status);
 447                         if (urb->iso_frame_desc[i].status != -EPROTO)
 448                                 continue;
 449                 }
 450
 451                 len = urb->iso_frame_desc[i].actual_length - 4;
 452
 453                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 454                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 455                         continue;
 456                 }
 457                 if (urb->iso_frame_desc[i].actual_length >
 458                                                 dev->max_pkt_size) {
 459                         em28xx_isocdbg("packet bigger than packet size");
 460                         continue;
 461                 }
 462
 463                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 464
 465                 /* FIXME: incomplete buffer checks where removed to make
 466                    logic simpler. Impacts of those changes should be evaluated
 467                  */
 468                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 469                         em28xx_isocdbg("VBI HEADER!!!\n");
 470                         /* FIXME: Should add vbi copy */
 471                         continue;
 472                 }
 473                 if (p[0] == 0x22 && p[1] == 0x5a) {
 474                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 475                                        len, (p[2] & 1) ? "odd" : "even");
 476
 477                         if (dev->progressive || !(p[2] & 1)) {
 478                                 if (buf != NULL)
 479                                         buffer_filled(dev, dma_q, buf);
 480                                 get_next_buf(dma_q, &buf);
 481                                 if (buf == NULL)
 482                                         outp = NULL;
 483                                 else
 484                                         outp = videobuf_to_vmalloc(&buf->vb);
 485                         }
 486
 487                         if (buf != NULL) {
 488                                 if (p[2] & 1)
 489                                         buf->top_field = 0;
 490                                 else
 491                                         buf->top_field = 1;
 492                         }
 493
 494                         dma_q->pos = 0;
 495                 }
 496                 if (buf != NULL) {
 497                         if (p[0] != 0x88 && p[0] != 0x22) {
 498                                 em28xx_isocdbg("frame is not complete\n");
 499                                 len += 4;
 500                         } else {
 501                                 p += 4;
 502                         }
 503                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 504                 }
 505         }
 506         return rc;
 507 }
 508
 509 /* Version of isoc handler that takes into account a mixture of video and
 510    VBI data */
 511 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 512 {
 513         struct em28xx_buffer    *buf, *vbi_buf;
 514         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 515         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 516         unsigned char *outp = NULL;
 517         unsigned char *vbioutp = NULL;
 518         int i, len = 0, rc = 1;
 519         unsigned char *p;
 520         int vbi_size;
 521
 522         if (!dev)
 523                 return 0;
 524
 525         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 526                 return 0;
 527
 528         if (urb->status < 0) {
 529                 print_err_status(dev, -1, urb->status);
 530                 if (urb->status == -ENOENT)
 531                         return 0;
 532         }
 533
 534         buf = dev->isoc_ctl.vid_buf;
 535         if (buf != NULL)
 536                 outp = videobuf_to_vmalloc(&buf->vb);
 537
 538         vbi_buf = dev->isoc_ctl.vbi_buf;
 539         if (vbi_buf != NULL)
 540                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 541
 542         for (i = 0; i < urb->number_of_packets; i++) {
 543                 int status = urb->iso_frame_desc[i].status;
 544
 545                 if (status < 0) {
 546                         print_err_status(dev, i, status);
 547                         if (urb->iso_frame_desc[i].status != -EPROTO)
 548                                 continue;
 549                 }
 550
 551                 len = urb->iso_frame_desc[i].actual_length;
 552                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 553                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 554                         continue;
 555                 }
 556                 if (urb->iso_frame_desc[i].actual_length >
 557                                                 dev->max_pkt_size) {
 558                         em28xx_isocdbg("packet bigger than packet size");
 559                         continue;
 560                 }
 561
 562                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 563
 564                 /* capture type 0 = vbi start
 565                    capture type 1 = video start
 566                    capture type 2 = video in progress */
 567                 if (p[0] == 0x33 && p[1] == 0x95) {
 568                         dev->capture_type = 0;
 569                         dev->vbi_read = 0;
 570                         em28xx_isocdbg("VBI START HEADER!!!\n");
 571                         dev->cur_field = p[2];
 572                         p += 4;
 573                         len -= 4;
 574                 } else if (p[0] == 0x88 && p[1] == 0x88 &&
 575                            p[2] == 0x88 && p[3] == 0x88) {
 576                         /* continuation */
 577                         p += 4;
 578                         len -= 4;
 579                 } else if (p[0] == 0x22 && p[1] == 0x5a) {
 580                         /* start video */
 581                         p += 4;
 582                         len -= 4;
 583                 }
 584
 585                 vbi_size = dev->vbi_width * dev->vbi_height;
 586
 587                 if (dev->capture_type == 0) {
 588                         if (dev->vbi_read >= vbi_size) {
 589                                 /* We've already read all the VBI data, so
 590                                    treat the rest as video */
 591                                 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
 592                         } else if ((dev->vbi_read + len) < vbi_size) {
 593                                 /* This entire frame is VBI data */
 594                                 if (dev->vbi_read == 0 &&
 595                                     (!(dev->cur_field & 1))) {
 596                                         /* Brand new frame */
 597                                         if (vbi_buf != NULL)
 598                                                 vbi_buffer_filled(dev,
 599                                                                   vbi_dma_q,
 600                                                                   vbi_buf);
 601                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 602                                         if (vbi_buf == NULL)
 603                                                 vbioutp = NULL;
 604                                         else
 605                                                 vbioutp = videobuf_to_vmalloc(
 606                                                         &vbi_buf->vb);
 607                                 }
 608
 609                                 if (dev->vbi_read == 0) {
 610                                         vbi_dma_q->pos = 0;
 611                                         if (vbi_buf != NULL) {
 612                                                 if (dev->cur_field & 1)
 613                                                         vbi_buf->top_field = 0;
 614                                                 else
 615                                                         vbi_buf->top_field = 1;
 616                                         }
 617                                 }
 618
 619                                 dev->vbi_read += len;
 620                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 621                                                 vbioutp, len);
 622                         } else {
 623                                 /* Some of this frame is VBI data and some is
 624                                    video data */
 625                                 int vbi_data_len = vbi_size - dev->vbi_read;
 626                                 dev->vbi_read += vbi_data_len;
 627                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 628                                                 vbioutp, vbi_data_len);
 629                                 dev->capture_type = 1;
 630                                 p += vbi_data_len;
 631                                 len -= vbi_data_len;
 632                         }
 633                 }
 634
 635                 if (dev->capture_type == 1) {
 636                         dev->capture_type = 2;
 637                         if (dev->progressive || !(dev->cur_field & 1)) {
 638                                 if (buf != NULL)
 639                                         buffer_filled(dev, dma_q, buf);
 640                                 get_next_buf(dma_q, &buf);
 641                                 if (buf == NULL)
 642                                         outp = NULL;
 643                                 else
 644                                         outp = videobuf_to_vmalloc(&buf->vb);
 645                         }
 646                         if (buf != NULL) {
 647                                 if (dev->cur_field & 1)
 648                                         buf->top_field = 0;
 649                                 else
 650                                         buf->top_field = 1;
 651                         }
 652
 653                         dma_q->pos = 0;
 654                 }
 655
 656                 if (buf != NULL && dev->capture_type == 2) {
 657                         if (len > 4 && p[0] == 0x88 && p[1] == 0x88 &&
 658                             p[2] == 0x88 && p[3] == 0x88) {
 659                                 p += 4;
 660                                 len -= 4;
 661                         }
 662                         if (len > 4 && p[0] == 0x22 && p[1] == 0x5a) {
 663                                 em28xx_isocdbg("Video frame %d, len=%i, %s\n",
 664                                                p[2], len, (p[2] & 1) ?
 665                                                "odd" : "even");
 666                                 p += 4;
 667                                 len -= 4;
 668                         }
 669
 670                         if (len > 0)
 671                                 em28xx_copy_video(dev, dma_q, buf, p, outp,
 672                                                   len);
 673                 }
 674         }
 675         return rc;
 676 }
 677
 678
 679 /* ------------------------------------------------------------------
 680         Videobuf operations
 681    ------------------------------------------------------------------*/
 682
 683 static int
 684 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 685 {
 686         struct em28xx_fh *fh = vq->priv_data;
 687         struct em28xx        *dev = fh->dev;
 688         struct v4l2_frequency f;
 689
 690         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
 691                 >> 3;
 692
 693         if (0 == *count)
 694                 *count = EM28XX_DEF_BUF;
 695
 696         if (*count < EM28XX_MIN_BUF)
 697                 *count = EM28XX_MIN_BUF;
 698
 699         /* Ask tuner to go to analog or radio mode */
 700         memset(&f, 0, sizeof(f));
 701         f.frequency = dev->ctl_freq;
 702         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 703
 704         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 705
 706         return 0;
 707 }
 708
 709 /* This is called *without* dev->slock held; please keep it that way */
 710 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 711 {
 712         struct em28xx_fh     *fh  = vq->priv_data;
 713         struct em28xx        *dev = fh->dev;
 714         unsigned long flags = 0;
 715         if (in_interrupt())
 716                 BUG();
 717
 718         /* We used to wait for the buffer to finish here, but this didn't work
 719            because, as we were keeping the state as VIDEOBUF_QUEUED,
 720            videobuf_queue_cancel marked it as finished for us.
 721            (Also, it could wedge forever if the hardware was misconfigured.)
 722
 723            This should be safe; by the time we get here, the buffer isn't
 724            queued anymore. If we ever start marking the buffers as
 725            VIDEOBUF_ACTIVE, it won't be, though.
 726         */
 727         spin_lock_irqsave(&dev->slock, flags);
 728         if (dev->isoc_ctl.vid_buf == buf)
 729                 dev->isoc_ctl.vid_buf = NULL;
 730         spin_unlock_irqrestore(&dev->slock, flags);
 731
 732         videobuf_vmalloc_free(&buf->vb);
 733         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 734 }
 735
 736 static int
 737 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 738                                                 enum v4l2_field field)
 739 {
 740         struct em28xx_fh     *fh  = vq->priv_data;
 741         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 742         struct em28xx        *dev = fh->dev;
 743         int                  rc = 0, urb_init = 0;
 744
 745         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
 746                         + 7) >> 3;
 747
 748         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 749                 return -EINVAL;
 750
 751         buf->vb.width  = dev->width;
 752         buf->vb.height = dev->height;
 753         buf->vb.field  = field;
 754
 755         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 756                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 757                 if (rc < 0)
 758                         goto fail;
 759         }
 760
 761         if (!dev->isoc_ctl.num_bufs)
 762                 urb_init = 1;
 763
 764         if (urb_init) {
 765                 if (em28xx_vbi_supported(dev) == 1)
 766                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 767                                               EM28XX_NUM_BUFS,
 768                                               dev->max_pkt_size,
 769                                               em28xx_isoc_copy_vbi);
 770                 else
 771                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 772                                               EM28XX_NUM_BUFS,
 773                                               dev->max_pkt_size,
 774                                               em28xx_isoc_copy);
 775                 if (rc < 0)
 776                         goto fail;
 777         }
 778
 779         buf->vb.state = VIDEOBUF_PREPARED;
 780         return 0;
 781
 782 fail:
 783         free_buffer(vq, buf);
 784         return rc;
 785 }
 786
 787 static void
 788 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 789 {
 790         struct em28xx_buffer    *buf     = container_of(vb,
 791                                                         struct em28xx_buffer,
 792                                                         vb);
 793         struct em28xx_fh        *fh      = vq->priv_data;
 794         struct em28xx           *dev     = fh->dev;
 795         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 796
 797         buf->vb.state = VIDEOBUF_QUEUED;
 798         list_add_tail(&buf->vb.queue, &vidq->active);
 799
 800 }
 801
 802 static void buffer_release(struct videobuf_queue *vq,
 803                                 struct videobuf_buffer *vb)
 804 {
 805         struct em28xx_buffer   *buf  = container_of(vb,
 806                                                     struct em28xx_buffer,
 807                                                     vb);
 808         struct em28xx_fh       *fh   = vq->priv_data;
 809         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 810
 811         em28xx_isocdbg("em28xx: called buffer_release\n");
 812
 813         free_buffer(vq, buf);
 814 }
 815
 816 static struct videobuf_queue_ops em28xx_video_qops = {
 817         .buf_setup      = buffer_setup,
 818         .buf_prepare    = buffer_prepare,
 819         .buf_queue      = buffer_queue,
 820         .buf_release    = buffer_release,
 821 };
 822
 823 /*********************  v4l2 interface  **************************************/
 824
 825 static void video_mux(struct em28xx *dev, int index)
 826 {
 827         dev->ctl_input = index;
 828         dev->ctl_ainput = INPUT(index)->amux;
 829         dev->ctl_aoutput = INPUT(index)->aout;
 830
 831         if (!dev->ctl_aoutput)
 832                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 833
 834         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 835                         INPUT(index)->vmux, 0, 0);
 836
 837         if (dev->board.has_msp34xx) {
 838                 if (dev->i2s_speed) {
 839                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 840                                 s_i2s_clock_freq, dev->i2s_speed);
 841                 }
 842                 /* Note: this is msp3400 specific */
 843                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 844                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 845         }
 846
 847         if (dev->board.adecoder != EM28XX_NOADECODER) {
 848                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 849                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 850         }
 851
 852         em28xx_audio_analog_set(dev);
 853 }
 854
 855 /* Usage lock check functions */
 856 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 857 {
 858         struct em28xx    *dev = fh->dev;
 859
 860         if (fh->resources & bit)
 861                 /* have it already allocated */
 862                 return 1;
 863
 864         /* is it free? */
 865         mutex_lock(&dev->lock);
 866         if (dev->resources & bit) {
 867                 /* no, someone else uses it */
 868                 mutex_unlock(&dev->lock);
 869                 return 0;
 870         }
 871         /* it's free, grab it */
 872         fh->resources  |= bit;
 873         dev->resources |= bit;
 874         em28xx_videodbg("res: get %d\n", bit);
 875         mutex_unlock(&dev->lock);
 876         return 1;
 877 }
 878
 879 static int res_check(struct em28xx_fh *fh, unsigned int bit)
 880 {
 881         return fh->resources & bit;
 882 }
 883
 884 static int res_locked(struct em28xx *dev, unsigned int bit)
 885 {
 886         return dev->resources & bit;
 887 }
 888
 889 static void res_free(struct em28xx_fh *fh, unsigned int bits)
 890 {
 891         struct em28xx    *dev = fh->dev;
 892
 893         BUG_ON((fh->resources & bits) != bits);
 894
 895         mutex_lock(&dev->lock);
 896         fh->resources  &= ~bits;
 897         dev->resources &= ~bits;
 898         em28xx_videodbg("res: put %d\n", bits);
 899         mutex_unlock(&dev->lock);
 900 }
 901
 902 static int get_ressource(struct em28xx_fh *fh)
 903 {
 904         switch (fh->type) {
 905         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 906                 return EM28XX_RESOURCE_VIDEO;
 907         case V4L2_BUF_TYPE_VBI_CAPTURE:
 908                 return EM28XX_RESOURCE_VBI;
 909         default:
 910                 BUG();
 911                 return 0;
 912         }
 913 }
 914
 915 /*
 916  * ac97_queryctrl()
 917  * return the ac97 supported controls
 918  */
 919 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 920 {
 921         int i;
 922
 923         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 924                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 925                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 926                         return 0;
 927                 }
 928         }
 929
 930         /* Control is not ac97 related */
 931         return 1;
 932 }
 933
 934 /*
 935  * ac97_get_ctrl()
 936  * return the current values for ac97 mute and volume
 937  */
 938 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 939 {
 940         switch (ctrl->id) {
 941         case V4L2_CID_AUDIO_MUTE:
 942                 ctrl->value = dev->mute;
 943                 return 0;
 944         case V4L2_CID_AUDIO_VOLUME:
 945                 ctrl->value = dev->volume;
 946                 return 0;
 947         default:
 948                 /* Control is not ac97 related */
 949                 return 1;
 950         }
 951 }
 952
 953 /*
 954  * ac97_set_ctrl()
 955  * set values for ac97 mute and volume
 956  */
 957 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 958 {
 959         int i;
 960
 961         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 962                 if (ctrl->id == ac97_qctrl[i].id)
 963                         goto handle;
 964
 965         /* Announce that hasn't handle it */
 966         return 1;
 967
 968 handle:
 969         if (ctrl->value < ac97_qctrl[i].minimum ||
 970             ctrl->value > ac97_qctrl[i].maximum)
 971                 return -ERANGE;
 972
 973         switch (ctrl->id) {
 974         case V4L2_CID_AUDIO_MUTE:
 975                 dev->mute = ctrl->value;
 976                 break;
 977         case V4L2_CID_AUDIO_VOLUME:
 978                 dev->volume = ctrl->value;
 979                 break;
 980         }
 981
 982         return em28xx_audio_analog_set(dev);
 983 }
 984
 985 static int check_dev(struct em28xx *dev)
 986 {
 987         if (dev->state & DEV_DISCONNECTED) {
 988                 em28xx_errdev("v4l2 ioctl: device not present\n");
 989                 return -ENODEV;
 990         }
 991
 992         if (dev->state & DEV_MISCONFIGURED) {
 993                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 994                               "close and open it again\n");
 995                 return -EIO;
 996         }
 997         return 0;
 998 }
 999
1000 static void get_scale(struct em28xx *dev,
1001                         unsigned int width, unsigned int height,
1002                         unsigned int *hscale, unsigned int *vscale)
1003 {
1004         unsigned int          maxw = norm_maxw(dev);
1005         unsigned int          maxh = norm_maxh(dev);
1006
1007         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1008         if (*hscale >= 0x4000)
1009                 *hscale = 0x3fff;
1010
1011         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1012         if (*vscale >= 0x4000)
1013                 *vscale = 0x3fff;
1014 }
1015
1016 /* ------------------------------------------------------------------
1017         IOCTL vidioc handling
1018    ------------------------------------------------------------------*/
1019
1020 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1021                                         struct v4l2_format *f)
1022 {
1023         struct em28xx_fh      *fh  = priv;
1024         struct em28xx         *dev = fh->dev;
1025
1026         mutex_lock(&dev->lock);
1027
1028         f->fmt.pix.width = dev->width;
1029         f->fmt.pix.height = dev->height;
1030         f->fmt.pix.pixelformat = dev->format->fourcc;
1031         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1032         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1033         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1034
1035         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1036         if (dev->progressive)
1037                 f->fmt.pix.field = V4L2_FIELD_NONE;
1038         else
1039                 f->fmt.pix.field = dev->interlaced ?
1040                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1041
1042         mutex_unlock(&dev->lock);
1043         return 0;
1044 }
1045
1046 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1047 {
1048         unsigned int i;
1049
1050         for (i = 0; i < ARRAY_SIZE(format); i++)
1051                 if (format[i].fourcc == fourcc)
1052                         return &format[i];
1053
1054         return NULL;
1055 }
1056
1057 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1058                         struct v4l2_format *f)
1059 {
1060         struct em28xx_fh      *fh    = priv;
1061         struct em28xx         *dev   = fh->dev;
1062         unsigned int          width  = f->fmt.pix.width;
1063         unsigned int          height = f->fmt.pix.height;
1064         unsigned int          maxw   = norm_maxw(dev);
1065         unsigned int          maxh   = norm_maxh(dev);
1066         unsigned int          hscale, vscale;
1067         struct em28xx_fmt     *fmt;
1068
1069         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1070         if (!fmt) {
1071                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1072                                 f->fmt.pix.pixelformat);
1073                 return -EINVAL;
1074         }
1075
1076         if (dev->board.is_em2800) {
1077                 /* the em2800 can only scale down to 50% */
1078                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1079                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1080         } else {
1081                 /* width must even because of the YUYV format
1082                    height must be even because of interlacing */
1083                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1084                                       1, 0);
1085         }
1086
1087         get_scale(dev, width, height, &hscale, &vscale);
1088
1089         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1090         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1091
1092         f->fmt.pix.width = width;
1093         f->fmt.pix.height = height;
1094         f->fmt.pix.pixelformat = fmt->fourcc;
1095         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1096         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1097         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1098         if (dev->progressive)
1099                 f->fmt.pix.field = V4L2_FIELD_NONE;
1100         else
1101                 f->fmt.pix.field = dev->interlaced ?
1102                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1103
1104         return 0;
1105 }
1106
1107 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1108                                    unsigned width, unsigned height)
1109 {
1110         struct em28xx_fmt     *fmt;
1111
1112         fmt = format_by_fourcc(fourcc);
1113         if (!fmt)
1114                 return -EINVAL;
1115
1116         dev->format = fmt;
1117         dev->width  = width;
1118         dev->height = height;
1119
1120         /* set new image size */
1121         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1122
1123         em28xx_set_alternate(dev);
1124         em28xx_resolution_set(dev);
1125
1126         return 0;
1127 }
1128
1129 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1130                         struct v4l2_format *f)
1131 {
1132         struct em28xx_fh      *fh  = priv;
1133         struct em28xx         *dev = fh->dev;
1134         int                   rc;
1135
1136         rc = check_dev(dev);
1137         if (rc < 0)
1138                 return rc;
1139
1140         mutex_lock(&dev->lock);
1141
1142         vidioc_try_fmt_vid_cap(file, priv, f);
1143
1144         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1145                 em28xx_errdev("%s queue busy\n", __func__);
1146                 rc = -EBUSY;
1147                 goto out;
1148         }
1149
1150         rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1151                                 f->fmt.pix.width, f->fmt.pix.height);
1152
1153 out:
1154         mutex_unlock(&dev->lock);
1155         return rc;
1156 }
1157
1158 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1159 {
1160         struct em28xx_fh   *fh  = priv;
1161         struct em28xx      *dev = fh->dev;
1162         int                rc;
1163
1164         rc = check_dev(dev);
1165         if (rc < 0)
1166                 return rc;
1167
1168         *norm = dev->norm;
1169
1170         return 0;
1171 }
1172
1173 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1174 {
1175         struct em28xx_fh   *fh  = priv;
1176         struct em28xx      *dev = fh->dev;
1177         struct v4l2_format f;
1178         int                rc;
1179
1180         rc = check_dev(dev);
1181         if (rc < 0)
1182                 return rc;
1183
1184         mutex_lock(&dev->lock);
1185         dev->norm = *norm;
1186
1187         /* Adjusts width/height, if needed */
1188         f.fmt.pix.width = dev->width;
1189         f.fmt.pix.height = dev->height;
1190         vidioc_try_fmt_vid_cap(file, priv, &f);
1191
1192         /* set new image size */
1193         dev->width = f.fmt.pix.width;
1194         dev->height = f.fmt.pix.height;
1195         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1196
1197         em28xx_resolution_set(dev);
1198         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1199
1200         mutex_unlock(&dev->lock);
1201         return 0;
1202 }
1203
1204 static int vidioc_g_parm(struct file *file, void *priv,
1205                          struct v4l2_streamparm *p)
1206 {
1207         struct em28xx_fh   *fh  = priv;
1208         struct em28xx      *dev = fh->dev;
1209         int rc = 0;
1210
1211         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1212                 return -EINVAL;
1213
1214         if (dev->board.is_webcam)
1215                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1216                                                 video, g_parm, p);
1217         else
1218                 v4l2_video_std_frame_period(dev->norm,
1219                                                  &p->parm.capture.timeperframe);
1220
1221         return rc;
1222 }
1223
1224 static int vidioc_s_parm(struct file *file, void *priv,
1225                          struct v4l2_streamparm *p)
1226 {
1227         struct em28xx_fh   *fh  = priv;
1228         struct em28xx      *dev = fh->dev;
1229
1230         if (!dev->board.is_webcam)
1231                 return -EINVAL;
1232
1233         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1234                 return -EINVAL;
1235
1236         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1237 }
1238
1239 static const char *iname[] = {
1240         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1241         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1242         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1243         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1244         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1245         [EM28XX_VMUX_TELEVISION] = "Television",
1246         [EM28XX_VMUX_CABLE]      = "Cable TV",
1247         [EM28XX_VMUX_DVB]        = "DVB",
1248         [EM28XX_VMUX_DEBUG]      = "for debug only",
1249 };
1250
1251 static int vidioc_enum_input(struct file *file, void *priv,
1252                                 struct v4l2_input *i)
1253 {
1254         struct em28xx_fh   *fh  = priv;
1255         struct em28xx      *dev = fh->dev;
1256         unsigned int       n;
1257
1258         n = i->index;
1259         if (n >= MAX_EM28XX_INPUT)
1260                 return -EINVAL;
1261         if (0 == INPUT(n)->type)
1262                 return -EINVAL;
1263
1264         i->index = n;
1265         i->type = V4L2_INPUT_TYPE_CAMERA;
1266
1267         strcpy(i->name, iname[INPUT(n)->type]);
1268
1269         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1270                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1271                 i->type = V4L2_INPUT_TYPE_TUNER;
1272
1273         i->std = dev->vdev->tvnorms;
1274
1275         return 0;
1276 }
1277
1278 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1279 {
1280         struct em28xx_fh   *fh  = priv;
1281         struct em28xx      *dev = fh->dev;
1282
1283         *i = dev->ctl_input;
1284
1285         return 0;
1286 }
1287
1288 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1289 {
1290         struct em28xx_fh   *fh  = priv;
1291         struct em28xx      *dev = fh->dev;
1292         int                rc;
1293
1294         rc = check_dev(dev);
1295         if (rc < 0)
1296                 return rc;
1297
1298         if (i >= MAX_EM28XX_INPUT)
1299                 return -EINVAL;
1300         if (0 == INPUT(i)->type)
1301                 return -EINVAL;
1302
1303         dev->ctl_input = i;
1304
1305         mutex_lock(&dev->lock);
1306         video_mux(dev, dev->ctl_input);
1307         mutex_unlock(&dev->lock);
1308         return 0;
1309 }
1310
1311 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1312 {
1313         struct em28xx_fh   *fh    = priv;
1314         struct em28xx      *dev   = fh->dev;
1315
1316         if (!dev->audio_mode.has_audio)
1317                 return -EINVAL;
1318
1319         switch (a->index) {
1320         case EM28XX_AMUX_VIDEO:
1321                 strcpy(a->name, "Television");
1322                 break;
1323         case EM28XX_AMUX_LINE_IN:
1324                 strcpy(a->name, "Line In");
1325                 break;
1326         case EM28XX_AMUX_VIDEO2:
1327                 strcpy(a->name, "Television alt");
1328                 break;
1329         case EM28XX_AMUX_PHONE:
1330                 strcpy(a->name, "Phone");
1331                 break;
1332         case EM28XX_AMUX_MIC:
1333                 strcpy(a->name, "Mic");
1334                 break;
1335         case EM28XX_AMUX_CD:
1336                 strcpy(a->name, "CD");
1337                 break;
1338         case EM28XX_AMUX_AUX:
1339                 strcpy(a->name, "Aux");
1340                 break;
1341         case EM28XX_AMUX_PCM_OUT:
1342                 strcpy(a->name, "PCM");
1343                 break;
1344         default:
1345                 return -EINVAL;
1346         }
1347
1348         a->index = dev->ctl_ainput;
1349         a->capability = V4L2_AUDCAP_STEREO;
1350
1351         return 0;
1352 }
1353
1354 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1355 {
1356         struct em28xx_fh   *fh  = priv;
1357         struct em28xx      *dev = fh->dev;
1358
1359
1360         if (!dev->audio_mode.has_audio)
1361                 return -EINVAL;
1362
1363         if (a->index >= MAX_EM28XX_INPUT)
1364                 return -EINVAL;
1365         if (0 == INPUT(a->index)->type)
1366                 return -EINVAL;
1367
1368         mutex_lock(&dev->lock);
1369
1370         dev->ctl_ainput = INPUT(a->index)->amux;
1371         dev->ctl_aoutput = INPUT(a->index)->aout;
1372
1373         if (!dev->ctl_aoutput)
1374                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1375
1376         mutex_unlock(&dev->lock);
1377         return 0;
1378 }
1379
1380 static int vidioc_queryctrl(struct file *file, void *priv,
1381                                 struct v4l2_queryctrl *qc)
1382 {
1383         struct em28xx_fh      *fh  = priv;
1384         struct em28xx         *dev = fh->dev;
1385         int                   id  = qc->id;
1386         int                   rc;
1387
1388         rc = check_dev(dev);
1389         if (rc < 0)
1390                 return rc;
1391
1392         memset(qc, 0, sizeof(*qc));
1393
1394         qc->id = id;
1395
1396         /* enumberate AC97 controls */
1397         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1398                 rc = ac97_queryctrl(qc);
1399                 if (!rc)
1400                         return 0;
1401         }
1402
1403         /* enumberate V4L2 device controls */
1404         mutex_lock(&dev->lock);
1405         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1406         mutex_unlock(&dev->lock);
1407
1408         if (qc->type)
1409                 return 0;
1410         else
1411                 return -EINVAL;
1412 }
1413
1414 static int vidioc_g_ctrl(struct file *file, void *priv,
1415                                 struct v4l2_control *ctrl)
1416 {
1417         struct em28xx_fh      *fh  = priv;
1418         struct em28xx         *dev = fh->dev;
1419         int                   rc;
1420
1421         rc = check_dev(dev);
1422         if (rc < 0)
1423                 return rc;
1424         rc = 0;
1425
1426         mutex_lock(&dev->lock);
1427
1428         /* Set an AC97 control */
1429         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1430                 rc = ac97_get_ctrl(dev, ctrl);
1431         else
1432                 rc = 1;
1433
1434         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1435         if (rc == 1) {
1436                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1437                 rc = 0;
1438         }
1439
1440         mutex_unlock(&dev->lock);
1441         return rc;
1442 }
1443
1444 static int vidioc_s_ctrl(struct file *file, void *priv,
1445                                 struct v4l2_control *ctrl)
1446 {
1447         struct em28xx_fh      *fh  = priv;
1448         struct em28xx         *dev = fh->dev;
1449         int                   rc;
1450
1451         rc = check_dev(dev);
1452         if (rc < 0)
1453                 return rc;
1454
1455         mutex_lock(&dev->lock);
1456
1457         /* Set an AC97 control */
1458         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1459                 rc = ac97_set_ctrl(dev, ctrl);
1460         else
1461                 rc = 1;
1462
1463         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1464         if (rc == 1) {
1465                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1466
1467                 /*
1468                  * In the case of non-AC97 volume controls, we still need
1469                  * to do some setups at em28xx, in order to mute/unmute
1470                  * and to adjust audio volume. However, the value ranges
1471                  * should be checked by the corresponding V4L subdriver.
1472                  */
1473                 switch (ctrl->id) {
1474                 case V4L2_CID_AUDIO_MUTE:
1475                         dev->mute = ctrl->value;
1476                         rc = em28xx_audio_analog_set(dev);
1477                         break;
1478                 case V4L2_CID_AUDIO_VOLUME:
1479                         dev->volume = ctrl->value;
1480                         rc = em28xx_audio_analog_set(dev);
1481                 }
1482         }
1483
1484         mutex_unlock(&dev->lock);
1485         return rc;
1486 }
1487
1488 static int vidioc_g_tuner(struct file *file, void *priv,
1489                                 struct v4l2_tuner *t)
1490 {
1491         struct em28xx_fh      *fh  = priv;
1492         struct em28xx         *dev = fh->dev;
1493         int                   rc;
1494
1495         rc = check_dev(dev);
1496         if (rc < 0)
1497                 return rc;
1498
1499         if (0 != t->index)
1500                 return -EINVAL;
1501
1502         strcpy(t->name, "Tuner");
1503         t->type = V4L2_TUNER_ANALOG_TV;
1504
1505         mutex_lock(&dev->lock);
1506         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1507         mutex_unlock(&dev->lock);
1508
1509         return 0;
1510 }
1511
1512 static int vidioc_s_tuner(struct file *file, void *priv,
1513                                 struct v4l2_tuner *t)
1514 {
1515         struct em28xx_fh      *fh  = priv;
1516         struct em28xx         *dev = fh->dev;
1517         int                   rc;
1518
1519         rc = check_dev(dev);
1520         if (rc < 0)
1521                 return rc;
1522
1523         if (0 != t->index)
1524                 return -EINVAL;
1525
1526         mutex_lock(&dev->lock);
1527         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1528         mutex_unlock(&dev->lock);
1529
1530         return 0;
1531 }
1532
1533 static int vidioc_g_frequency(struct file *file, void *priv,
1534                                 struct v4l2_frequency *f)
1535 {
1536         struct em28xx_fh      *fh  = priv;
1537         struct em28xx         *dev = fh->dev;
1538
1539         mutex_lock(&dev->lock);
1540         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1541         f->frequency = dev->ctl_freq;
1542         mutex_unlock(&dev->lock);
1543
1544         return 0;
1545 }
1546
1547 static int vidioc_s_frequency(struct file *file, void *priv,
1548                                 struct v4l2_frequency *f)
1549 {
1550         struct em28xx_fh      *fh  = priv;
1551         struct em28xx         *dev = fh->dev;
1552         int                   rc;
1553
1554         rc = check_dev(dev);
1555         if (rc < 0)
1556                 return rc;
1557
1558         if (0 != f->tuner)
1559                 return -EINVAL;
1560
1561         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1562                 return -EINVAL;
1563         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1564                 return -EINVAL;
1565
1566         mutex_lock(&dev->lock);
1567
1568         dev->ctl_freq = f->frequency;
1569         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1570
1571         mutex_unlock(&dev->lock);
1572
1573         return 0;
1574 }
1575
1576 #ifdef CONFIG_VIDEO_ADV_DEBUG
1577 static int em28xx_reg_len(int reg)
1578 {
1579         switch (reg) {
1580         case EM28XX_R40_AC97LSB:
1581         case EM28XX_R30_HSCALELOW:
1582         case EM28XX_R32_VSCALELOW:
1583                 return 2;
1584         default:
1585                 return 1;
1586         }
1587 }
1588
1589 static int vidioc_g_chip_ident(struct file *file, void *priv,
1590                struct v4l2_dbg_chip_ident *chip)
1591 {
1592         struct em28xx_fh      *fh  = priv;
1593         struct em28xx         *dev = fh->dev;
1594
1595         chip->ident = V4L2_IDENT_NONE;
1596         chip->revision = 0;
1597
1598         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1599
1600         return 0;
1601 }
1602
1603
1604 static int vidioc_g_register(struct file *file, void *priv,
1605                              struct v4l2_dbg_register *reg)
1606 {
1607         struct em28xx_fh      *fh  = priv;
1608         struct em28xx         *dev = fh->dev;
1609         int ret;
1610
1611         switch (reg->match.type) {
1612         case V4L2_CHIP_MATCH_AC97:
1613                 mutex_lock(&dev->lock);
1614                 ret = em28xx_read_ac97(dev, reg->reg);
1615                 mutex_unlock(&dev->lock);
1616                 if (ret < 0)
1617                         return ret;
1618
1619                 reg->val = ret;
1620                 reg->size = 1;
1621                 return 0;
1622         case V4L2_CHIP_MATCH_I2C_DRIVER:
1623                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1624                 return 0;
1625         case V4L2_CHIP_MATCH_I2C_ADDR:
1626                 /* TODO: is this correct? */
1627                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1628                 return 0;
1629         default:
1630                 if (!v4l2_chip_match_host(&reg->match))
1631                         return -EINVAL;
1632         }
1633
1634         /* Match host */
1635         reg->size = em28xx_reg_len(reg->reg);
1636         if (reg->size == 1) {
1637                 mutex_lock(&dev->lock);
1638                 ret = em28xx_read_reg(dev, reg->reg);
1639                 mutex_unlock(&dev->lock);
1640
1641                 if (ret < 0)
1642                         return ret;
1643
1644                 reg->val = ret;
1645         } else {
1646                 __le16 val = 0;
1647                 mutex_lock(&dev->lock);
1648                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1649                                                    reg->reg, (char *)&val, 2);
1650                 mutex_unlock(&dev->lock);
1651                 if (ret < 0)
1652                         return ret;
1653
1654                 reg->val = le16_to_cpu(val);
1655         }
1656
1657         return 0;
1658 }
1659
1660 static int vidioc_s_register(struct file *file, void *priv,
1661                              struct v4l2_dbg_register *reg)
1662 {
1663         struct em28xx_fh      *fh  = priv;
1664         struct em28xx         *dev = fh->dev;
1665         __le16 buf;
1666         int    rc;
1667
1668         switch (reg->match.type) {
1669         case V4L2_CHIP_MATCH_AC97:
1670                 mutex_lock(&dev->lock);
1671                 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1672                 mutex_unlock(&dev->lock);
1673
1674                 return rc;
1675         case V4L2_CHIP_MATCH_I2C_DRIVER:
1676                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1677                 return 0;
1678         case V4L2_CHIP_MATCH_I2C_ADDR:
1679                 /* TODO: is this correct? */
1680                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1681                 return 0;
1682         default:
1683                 if (!v4l2_chip_match_host(&reg->match))
1684                         return -EINVAL;
1685         }
1686
1687         /* Match host */
1688         buf = cpu_to_le16(reg->val);
1689
1690         mutex_lock(&dev->lock);
1691         rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1692                                em28xx_reg_len(reg->reg));
1693         mutex_unlock(&dev->lock);
1694
1695         return rc;
1696 }
1697 #endif
1698
1699
1700 static int vidioc_cropcap(struct file *file, void *priv,
1701                                         struct v4l2_cropcap *cc)
1702 {
1703         struct em28xx_fh      *fh  = priv;
1704         struct em28xx         *dev = fh->dev;
1705
1706         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1707                 return -EINVAL;
1708
1709         cc->bounds.left = 0;
1710         cc->bounds.top = 0;
1711         cc->bounds.width = dev->width;
1712         cc->bounds.height = dev->height;
1713         cc->defrect = cc->bounds;
1714         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1715         cc->pixelaspect.denominator = 59;
1716
1717         return 0;
1718 }
1719
1720 static int vidioc_streamon(struct file *file, void *priv,
1721                                         enum v4l2_buf_type type)
1722 {
1723         struct em28xx_fh      *fh  = priv;
1724         struct em28xx         *dev = fh->dev;
1725         int                   rc = -EINVAL;
1726
1727         rc = check_dev(dev);
1728         if (rc < 0)
1729                 return rc;
1730
1731         if (unlikely(type != fh->type))
1732                 return -EINVAL;
1733
1734         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1735                         fh, type, fh->resources, dev->resources);
1736
1737         if (unlikely(!res_get(fh, get_ressource(fh))))
1738                 return -EBUSY;
1739
1740         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1741                 rc = videobuf_streamon(&fh->vb_vidq);
1742         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1743                 rc = videobuf_streamon(&fh->vb_vbiq);
1744
1745         return rc;
1746 }
1747
1748 static int vidioc_streamoff(struct file *file, void *priv,
1749                                         enum v4l2_buf_type type)
1750 {
1751         struct em28xx_fh      *fh  = priv;
1752         struct em28xx         *dev = fh->dev;
1753         int                   rc;
1754
1755         rc = check_dev(dev);
1756         if (rc < 0)
1757                 return rc;
1758
1759         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1760             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1761                 return -EINVAL;
1762         if (type != fh->type)
1763                 return -EINVAL;
1764
1765         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1766                         fh, type, fh->resources, dev->resources);
1767
1768         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1769                 videobuf_streamoff(&fh->vb_vidq);
1770                 res_free(fh, EM28XX_RESOURCE_VIDEO);
1771         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1772                 videobuf_streamoff(&fh->vb_vbiq);
1773                 res_free(fh, EM28XX_RESOURCE_VBI);
1774         }
1775
1776         return 0;
1777 }
1778
1779 static int vidioc_querycap(struct file *file, void  *priv,
1780                                         struct v4l2_capability *cap)
1781 {
1782         struct em28xx_fh      *fh  = priv;
1783         struct em28xx         *dev = fh->dev;
1784
1785         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1786         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1787         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1788
1789         cap->version = EM28XX_VERSION_CODE;
1790
1791         cap->capabilities =
1792                         V4L2_CAP_SLICED_VBI_CAPTURE |
1793                         V4L2_CAP_VIDEO_CAPTURE |
1794                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1795
1796         if (dev->vbi_dev)
1797                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1798
1799         if (dev->audio_mode.has_audio)
1800                 cap->capabilities |= V4L2_CAP_AUDIO;
1801
1802         if (dev->tuner_type != TUNER_ABSENT)
1803                 cap->capabilities |= V4L2_CAP_TUNER;
1804
1805         return 0;
1806 }
1807
1808 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1809                                         struct v4l2_fmtdesc *f)
1810 {
1811         if (unlikely(f->index >= ARRAY_SIZE(format)))
1812                 return -EINVAL;
1813
1814         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1815         f->pixelformat = format[f->index].fourcc;
1816
1817         return 0;
1818 }
1819
1820 /* Sliced VBI ioctls */
1821 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1822                                         struct v4l2_format *f)
1823 {
1824         struct em28xx_fh      *fh  = priv;
1825         struct em28xx         *dev = fh->dev;
1826         int                   rc;
1827
1828         rc = check_dev(dev);
1829         if (rc < 0)
1830                 return rc;
1831
1832         mutex_lock(&dev->lock);
1833
1834         f->fmt.sliced.service_set = 0;
1835         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1836
1837         if (f->fmt.sliced.service_set == 0)
1838                 rc = -EINVAL;
1839
1840         mutex_unlock(&dev->lock);
1841
1842         return rc;
1843 }
1844
1845 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1846                         struct v4l2_format *f)
1847 {
1848         struct em28xx_fh      *fh  = priv;
1849         struct em28xx         *dev = fh->dev;
1850         int                   rc;
1851
1852         rc = check_dev(dev);
1853         if (rc < 0)
1854                 return rc;
1855
1856         mutex_lock(&dev->lock);
1857         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1858         mutex_unlock(&dev->lock);
1859
1860         if (f->fmt.sliced.service_set == 0)
1861                 return -EINVAL;
1862
1863         return 0;
1864 }
1865
1866 /* RAW VBI ioctls */
1867
1868 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1869                                 struct v4l2_format *format)
1870 {
1871         struct em28xx_fh      *fh  = priv;
1872         struct em28xx         *dev = fh->dev;
1873
1874         format->fmt.vbi.samples_per_line = dev->vbi_width;
1875         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1876         format->fmt.vbi.offset = 0;
1877         format->fmt.vbi.flags = 0;
1878         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1879         format->fmt.vbi.count[0] = dev->vbi_height;
1880         format->fmt.vbi.count[1] = dev->vbi_height;
1881
1882         /* Varies by video standard (NTSC, PAL, etc.) */
1883         if (dev->norm & V4L2_STD_525_60) {
1884                 /* NTSC */
1885                 format->fmt.vbi.start[0] = 10;
1886                 format->fmt.vbi.start[1] = 273;
1887         } else if (dev->norm & V4L2_STD_625_50) {
1888                 /* PAL */
1889                 format->fmt.vbi.start[0] = 6;
1890                 format->fmt.vbi.start[1] = 318;
1891         }
1892
1893         return 0;
1894 }
1895
1896 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1897                                 struct v4l2_format *format)
1898 {
1899         struct em28xx_fh      *fh  = priv;
1900         struct em28xx         *dev = fh->dev;
1901
1902         format->fmt.vbi.samples_per_line = dev->vbi_width;
1903         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1904         format->fmt.vbi.offset = 0;
1905         format->fmt.vbi.flags = 0;
1906         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1907         format->fmt.vbi.count[0] = dev->vbi_height;
1908         format->fmt.vbi.count[1] = dev->vbi_height;
1909
1910         /* Varies by video standard (NTSC, PAL, etc.) */
1911         if (dev->norm & V4L2_STD_525_60) {
1912                 /* NTSC */
1913                 format->fmt.vbi.start[0] = 10;
1914                 format->fmt.vbi.start[1] = 273;
1915         } else if (dev->norm & V4L2_STD_625_50) {
1916                 /* PAL */
1917                 format->fmt.vbi.start[0] = 6;
1918                 format->fmt.vbi.start[1] = 318;
1919         }
1920
1921         return 0;
1922 }
1923
1924 static int vidioc_reqbufs(struct file *file, void *priv,
1925                           struct v4l2_requestbuffers *rb)
1926 {
1927         struct em28xx_fh      *fh  = priv;
1928         struct em28xx         *dev = fh->dev;
1929         int                   rc;
1930
1931         rc = check_dev(dev);
1932         if (rc < 0)
1933                 return rc;
1934
1935         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1936                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1937         else
1938                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1939 }
1940
1941 static int vidioc_querybuf(struct file *file, void *priv,
1942                            struct v4l2_buffer *b)
1943 {
1944         struct em28xx_fh      *fh  = priv;
1945         struct em28xx         *dev = fh->dev;
1946         int                   rc;
1947
1948         rc = check_dev(dev);
1949         if (rc < 0)
1950                 return rc;
1951
1952         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1953                 return videobuf_querybuf(&fh->vb_vidq, b);
1954         else {
1955                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1956                    the videobuf framework, but we probably shouldn't be
1957                    returning a buffer larger than that which was asked for.
1958                    At a minimum, it causes a crash in zvbi since it does
1959                    a memcpy based on the source buffer length */
1960                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1961                 b->length = dev->vbi_width * dev->vbi_height * 2;
1962
1963                 return result;
1964         }
1965 }
1966
1967 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1968 {
1969         struct em28xx_fh      *fh  = priv;
1970         struct em28xx         *dev = fh->dev;
1971         int                   rc;
1972
1973         rc = check_dev(dev);
1974         if (rc < 0)
1975                 return rc;
1976
1977         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1978                 return videobuf_qbuf(&fh->vb_vidq, b);
1979         else
1980                 return videobuf_qbuf(&fh->vb_vbiq, b);
1981 }
1982
1983 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1984 {
1985         struct em28xx_fh      *fh  = priv;
1986         struct em28xx         *dev = fh->dev;
1987         int                   rc;
1988
1989         rc = check_dev(dev);
1990         if (rc < 0)
1991                 return rc;
1992
1993         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1994                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1995                                       O_NONBLOCK);
1996         else
1997                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1998                                       O_NONBLOCK);
1999 }
2000
2001 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2002 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
2003 {
2004         struct em28xx_fh  *fh = priv;
2005
2006         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2007                 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
2008         else
2009                 return videobuf_cgmbuf(&fh->vb_vbiq, mbuf, 8);
2010 }
2011 #endif
2012
2013
2014 /* ----------------------------------------------------------- */
2015 /* RADIO ESPECIFIC IOCTLS                                      */
2016 /* ----------------------------------------------------------- */
2017
2018 static int radio_querycap(struct file *file, void  *priv,
2019                           struct v4l2_capability *cap)
2020 {
2021         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2022
2023         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
2024         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
2025         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
2026
2027         cap->version = EM28XX_VERSION_CODE;
2028         cap->capabilities = V4L2_CAP_TUNER;
2029         return 0;
2030 }
2031
2032 static int radio_g_tuner(struct file *file, void *priv,
2033                          struct v4l2_tuner *t)
2034 {
2035         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2036
2037         if (unlikely(t->index > 0))
2038                 return -EINVAL;
2039
2040         strcpy(t->name, "Radio");
2041         t->type = V4L2_TUNER_RADIO;
2042
2043         mutex_lock(&dev->lock);
2044         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2045         mutex_unlock(&dev->lock);
2046
2047         return 0;
2048 }
2049
2050 static int radio_enum_input(struct file *file, void *priv,
2051                             struct v4l2_input *i)
2052 {
2053         if (i->index != 0)
2054                 return -EINVAL;
2055         strcpy(i->name, "Radio");
2056         i->type = V4L2_INPUT_TYPE_TUNER;
2057
2058         return 0;
2059 }
2060
2061 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2062 {
2063         if (unlikely(a->index))
2064                 return -EINVAL;
2065
2066         strcpy(a->name, "Radio");
2067         return 0;
2068 }
2069
2070 static int radio_s_tuner(struct file *file, void *priv,
2071                          struct v4l2_tuner *t)
2072 {
2073         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2074
2075         if (0 != t->index)
2076                 return -EINVAL;
2077
2078         mutex_lock(&dev->lock);
2079         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2080         mutex_unlock(&dev->lock);
2081
2082         return 0;
2083 }
2084
2085 static int radio_s_audio(struct file *file, void *fh,
2086                          struct v4l2_audio *a)
2087 {
2088         return 0;
2089 }
2090
2091 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2092 {
2093         return 0;
2094 }
2095
2096 static int radio_queryctrl(struct file *file, void *priv,
2097                            struct v4l2_queryctrl *qc)
2098 {
2099         int i;
2100
2101         if (qc->id <  V4L2_CID_BASE ||
2102                 qc->id >= V4L2_CID_LASTP1)
2103                 return -EINVAL;
2104
2105         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2106                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2107                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2108                         return 0;
2109                 }
2110         }
2111
2112         return -EINVAL;
2113 }
2114
2115 /*
2116  * em28xx_v4l2_open()
2117  * inits the device and starts isoc transfer
2118  */
2119 static int em28xx_v4l2_open(struct file *filp)
2120 {
2121         int errCode = 0, radio = 0;
2122         struct video_device *vdev = video_devdata(filp);
2123         struct em28xx *dev = video_drvdata(filp);
2124         enum v4l2_buf_type fh_type = 0;
2125         struct em28xx_fh *fh;
2126         enum v4l2_field field;
2127
2128         switch (vdev->vfl_type) {
2129         case VFL_TYPE_GRABBER:
2130                 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2131                 break;
2132         case VFL_TYPE_VBI:
2133                 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2134                 break;
2135         case VFL_TYPE_RADIO:
2136                 radio = 1;
2137                 break;
2138         }
2139
2140         mutex_lock(&dev->lock);
2141
2142         em28xx_videodbg("open dev=%s type=%s users=%d\n",
2143                         video_device_node_name(vdev), v4l2_type_names[fh_type],
2144                         dev->users);
2145
2146
2147         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2148         if (!fh) {
2149                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2150                 mutex_unlock(&dev->lock);
2151                 return -ENOMEM;
2152         }
2153         fh->dev = dev;
2154         fh->radio = radio;
2155         fh->type = fh_type;
2156         filp->private_data = fh;
2157
2158         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2159                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2160                 em28xx_set_alternate(dev);
2161                 em28xx_resolution_set(dev);
2162
2163                 /* Needed, since GPIO might have disabled power of
2164                    some i2c device
2165                  */
2166                 em28xx_wake_i2c(dev);
2167
2168         }
2169         if (fh->radio) {
2170                 em28xx_videodbg("video_open: setting radio device\n");
2171                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2172         }
2173
2174         dev->users++;
2175
2176         if (dev->progressive)
2177                 field = V4L2_FIELD_NONE;
2178         else
2179                 field = V4L2_FIELD_INTERLACED;
2180
2181         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2182                                     NULL, &dev->slock,
2183                                     V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2184                                     sizeof(struct em28xx_buffer), fh);
2185
2186         videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2187                                     NULL, &dev->slock,
2188                                     V4L2_BUF_TYPE_VBI_CAPTURE,
2189                                     V4L2_FIELD_SEQ_TB,
2190                                     sizeof(struct em28xx_buffer), fh);
2191
2192         mutex_unlock(&dev->lock);
2193
2194         return errCode;
2195 }
2196
2197 /*
2198  * em28xx_realease_resources()
2199  * unregisters the v4l2,i2c and usb devices
2200  * called when the device gets disconected or at module unload
2201 */
2202 void em28xx_release_analog_resources(struct em28xx *dev)
2203 {
2204
2205         /*FIXME: I2C IR should be disconnected */
2206
2207         if (dev->radio_dev) {
2208                 if (video_is_registered(dev->radio_dev))
2209                         video_unregister_device(dev->radio_dev);
2210                 else
2211                         video_device_release(dev->radio_dev);
2212                 dev->radio_dev = NULL;
2213         }
2214         if (dev->vbi_dev) {
2215                 em28xx_info("V4L2 device %s deregistered\n",
2216                             video_device_node_name(dev->vbi_dev));
2217                 if (video_is_registered(dev->vbi_dev))
2218                         video_unregister_device(dev->vbi_dev);
2219                 else
2220                         video_device_release(dev->vbi_dev);
2221                 dev->vbi_dev = NULL;
2222         }
2223         if (dev->vdev) {
2224                 em28xx_info("V4L2 device %s deregistered\n",
2225                             video_device_node_name(dev->vdev));
2226                 if (video_is_registered(dev->vdev))
2227                         video_unregister_device(dev->vdev);
2228                 else
2229                         video_device_release(dev->vdev);
2230                 dev->vdev = NULL;
2231         }
2232 }
2233
2234 /*
2235  * em28xx_v4l2_close()
2236  * stops streaming and deallocates all resources allocated by the v4l2
2237  * calls and ioctls
2238  */
2239 static int em28xx_v4l2_close(struct file *filp)
2240 {
2241         struct em28xx_fh *fh  = filp->private_data;
2242         struct em28xx    *dev = fh->dev;
2243         int              errCode;
2244
2245         em28xx_videodbg("users=%d\n", dev->users);
2246
2247         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2248                 videobuf_stop(&fh->vb_vidq);
2249                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2250         }
2251
2252         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2253                 videobuf_stop(&fh->vb_vbiq);
2254                 res_free(fh, EM28XX_RESOURCE_VBI);
2255         }
2256
2257         if (dev->users == 1) {
2258                 /* the device is already disconnect,
2259                    free the remaining resources */
2260                 if (dev->state & DEV_DISCONNECTED) {
2261                         em28xx_release_resources(dev);
2262                         kfree(dev);
2263                         return 0;
2264                 }
2265
2266                 /* Save some power by putting tuner to sleep */
2267                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
2268
2269                 /* do this before setting alternate! */
2270                 em28xx_uninit_isoc(dev);
2271                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2272
2273                 /* set alternate 0 */
2274                 dev->alt = 0;
2275                 em28xx_videodbg("setting alternate 0\n");
2276                 errCode = usb_set_interface(dev->udev, 0, 0);
2277                 if (errCode < 0) {
2278                         em28xx_errdev("cannot change alternate number to "
2279                                         "0 (error=%i)\n", errCode);
2280                 }
2281         }
2282
2283         videobuf_mmap_free(&fh->vb_vidq);
2284         videobuf_mmap_free(&fh->vb_vbiq);
2285         kfree(fh);
2286         dev->users--;
2287         wake_up_interruptible_nr(&dev->open, 1);
2288         return 0;
2289 }
2290
2291 /*
2292  * em28xx_v4l2_read()
2293  * will allocate buffers when called for the first time
2294  */
2295 static ssize_t
2296 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2297                  loff_t *pos)
2298 {
2299         struct em28xx_fh *fh = filp->private_data;
2300         struct em28xx *dev = fh->dev;
2301         int rc;
2302
2303         rc = check_dev(dev);
2304         if (rc < 0)
2305                 return rc;
2306
2307         /* FIXME: read() is not prepared to allow changing the video
2308            resolution while streaming. Seems a bug at em28xx_set_fmt
2309          */
2310
2311         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2312                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2313                         return -EBUSY;
2314
2315                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2316                                         filp->f_flags & O_NONBLOCK);
2317         }
2318
2319
2320         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2321                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2322                         return -EBUSY;
2323
2324                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2325                                         filp->f_flags & O_NONBLOCK);
2326         }
2327
2328         return 0;
2329 }
2330
2331 /*
2332  * em28xx_v4l2_poll()
2333  * will allocate buffers when called for the first time
2334  */
2335 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2336 {
2337         struct em28xx_fh *fh = filp->private_data;
2338         struct em28xx *dev = fh->dev;
2339         int rc;
2340
2341         rc = check_dev(dev);
2342         if (rc < 0)
2343                 return rc;
2344
2345         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2346                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2347                         return POLLERR;
2348                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2349         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2350                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2351                         return POLLERR;
2352                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2353         } else {
2354                 return POLLERR;
2355         }
2356 }
2357
2358 /*
2359  * em28xx_v4l2_mmap()
2360  */
2361 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2362 {
2363         struct em28xx_fh *fh    = filp->private_data;
2364         struct em28xx    *dev   = fh->dev;
2365         int              rc;
2366
2367         rc = check_dev(dev);
2368         if (rc < 0)
2369                 return rc;
2370
2371         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2372                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2373         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2374                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2375
2376         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2377                 (unsigned long)vma->vm_start,
2378                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2379                 rc);
2380
2381         return rc;
2382 }
2383
2384 static const struct v4l2_file_operations em28xx_v4l_fops = {
2385         .owner         = THIS_MODULE,
2386         .open          = em28xx_v4l2_open,
2387         .release       = em28xx_v4l2_close,
2388         .read          = em28xx_v4l2_read,
2389         .poll          = em28xx_v4l2_poll,
2390         .mmap          = em28xx_v4l2_mmap,
2391         .ioctl         = video_ioctl2,
2392 };
2393
2394 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2395         .vidioc_querycap            = vidioc_querycap,
2396         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2397         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2398         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2399         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2400         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2401         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2402         .vidioc_g_audio             = vidioc_g_audio,
2403         .vidioc_s_audio             = vidioc_s_audio,
2404         .vidioc_cropcap             = vidioc_cropcap,
2405
2406         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2407         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2408         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2409
2410         .vidioc_reqbufs             = vidioc_reqbufs,
2411         .vidioc_querybuf            = vidioc_querybuf,
2412         .vidioc_qbuf                = vidioc_qbuf,
2413         .vidioc_dqbuf               = vidioc_dqbuf,
2414         .vidioc_g_std               = vidioc_g_std,
2415         .vidioc_s_std               = vidioc_s_std,
2416         .vidioc_g_parm              = vidioc_g_parm,
2417         .vidioc_s_parm              = vidioc_s_parm,
2418         .vidioc_enum_input          = vidioc_enum_input,
2419         .vidioc_g_input             = vidioc_g_input,
2420         .vidioc_s_input             = vidioc_s_input,
2421         .vidioc_queryctrl           = vidioc_queryctrl,
2422         .vidioc_g_ctrl              = vidioc_g_ctrl,
2423         .vidioc_s_ctrl              = vidioc_s_ctrl,
2424         .vidioc_streamon            = vidioc_streamon,
2425         .vidioc_streamoff           = vidioc_streamoff,
2426         .vidioc_g_tuner             = vidioc_g_tuner,
2427         .vidioc_s_tuner             = vidioc_s_tuner,
2428         .vidioc_g_frequency         = vidioc_g_frequency,
2429         .vidioc_s_frequency         = vidioc_s_frequency,
2430 #ifdef CONFIG_VIDEO_ADV_DEBUG
2431         .vidioc_g_register          = vidioc_g_register,
2432         .vidioc_s_register          = vidioc_s_register,
2433         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
2434 #endif
2435 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2436         .vidiocgmbuf                = vidiocgmbuf,
2437 #endif
2438 };
2439
2440 static const struct video_device em28xx_video_template = {
2441         .fops                       = &em28xx_v4l_fops,
2442         .release                    = video_device_release,
2443         .ioctl_ops                  = &video_ioctl_ops,
2444
2445         .tvnorms                    = V4L2_STD_ALL,
2446         .current_norm               = V4L2_STD_PAL,
2447 };
2448
2449 static const struct v4l2_file_operations radio_fops = {
2450         .owner         = THIS_MODULE,
2451         .open          = em28xx_v4l2_open,
2452         .release       = em28xx_v4l2_close,
2453         .ioctl         = video_ioctl2,
2454 };
2455
2456 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2457         .vidioc_querycap      = radio_querycap,
2458         .vidioc_g_tuner       = radio_g_tuner,
2459         .vidioc_enum_input    = radio_enum_input,
2460         .vidioc_g_audio       = radio_g_audio,
2461         .vidioc_s_tuner       = radio_s_tuner,
2462         .vidioc_s_audio       = radio_s_audio,
2463         .vidioc_s_input       = radio_s_input,
2464         .vidioc_queryctrl     = radio_queryctrl,
2465         .vidioc_g_ctrl        = vidioc_g_ctrl,
2466         .vidioc_s_ctrl        = vidioc_s_ctrl,
2467         .vidioc_g_frequency   = vidioc_g_frequency,
2468         .vidioc_s_frequency   = vidioc_s_frequency,
2469 #ifdef CONFIG_VIDEO_ADV_DEBUG
2470         .vidioc_g_register    = vidioc_g_register,
2471         .vidioc_s_register    = vidioc_s_register,
2472 #endif
2473 };
2474
2475 static struct video_device em28xx_radio_template = {
2476         .name                 = "em28xx-radio",
2477         .fops                 = &radio_fops,
2478         .ioctl_ops            = &radio_ioctl_ops,
2479 };
2480
2481 /******************************** usb interface ******************************/
2482
2483
2484
2485 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2486                                         const struct video_device *template,
2487                                         const char *type_name)
2488 {
2489         struct video_device *vfd;
2490
2491         vfd = video_device_alloc();
2492         if (NULL == vfd)
2493                 return NULL;
2494
2495         *vfd            = *template;
2496         vfd->v4l2_dev   = &dev->v4l2_dev;
2497         vfd->release    = video_device_release;
2498         vfd->debug      = video_debug;
2499
2500         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2501                  dev->name, type_name);
2502
2503         video_set_drvdata(vfd, dev);
2504         return vfd;
2505 }
2506
2507 int em28xx_register_analog_devices(struct em28xx *dev)
2508 {
2509       u8 val;
2510         int ret;
2511
2512         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
2513                 dev->name,
2514                 (EM28XX_VERSION_CODE >> 16) & 0xff,
2515                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2516
2517         /* set default norm */
2518         dev->norm = em28xx_video_template.current_norm;
2519         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2520         dev->ctl_input = 0;
2521
2522         /* Analog specific initialization */
2523         dev->format = &format[0];
2524         em28xx_set_video_format(dev, format[0].fourcc,
2525                                 norm_maxw(dev), norm_maxh(dev));
2526
2527         video_mux(dev, dev->ctl_input);
2528
2529         /* Audio defaults */
2530         dev->mute = 1;
2531         dev->volume = 0x1f;
2532
2533 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2534         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2535         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2536                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2537
2538         em28xx_set_outfmt(dev);
2539         em28xx_colorlevels_set_default(dev);
2540         em28xx_compression_disable(dev);
2541
2542         /* allocate and fill video video_device struct */
2543         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2544         if (!dev->vdev) {
2545                 em28xx_errdev("cannot allocate video_device.\n");
2546                 return -ENODEV;
2547         }
2548
2549         /* register v4l2 video video_device */
2550         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2551                                        video_nr[dev->devno]);
2552         if (ret) {
2553                 em28xx_errdev("unable to register video device (error=%i).\n",
2554                               ret);
2555                 return ret;
2556         }
2557
2558         /* Allocate and fill vbi video_device struct */
2559         if (em28xx_vbi_supported(dev) == 1) {
2560                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2561                                                 "vbi");
2562
2563                 /* register v4l2 vbi video_device */
2564                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2565                                             vbi_nr[dev->devno]);
2566                 if (ret < 0) {
2567                         em28xx_errdev("unable to register vbi device\n");
2568                         return ret;
2569                 }
2570         }
2571
2572         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2573                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2574                                                   "radio");
2575                 if (!dev->radio_dev) {
2576                         em28xx_errdev("cannot allocate video_device.\n");
2577                         return -ENODEV;
2578                 }
2579                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2580                                             radio_nr[dev->devno]);
2581                 if (ret < 0) {
2582                         em28xx_errdev("can't register radio device\n");
2583                         return ret;
2584                 }
2585                 em28xx_info("Registered radio device as %s\n",
2586                             video_device_node_name(dev->radio_dev));
2587         }
2588
2589         em28xx_info("V4L2 video device registered as %s\n",
2590                     video_device_node_name(dev->vdev));
2591
2592         if (dev->vbi_dev)
2593                 em28xx_info("V4L2 VBI device registered as %s\n",
2594                             video_device_node_name(dev->vbi_dev));
2595
2596         return 0;
2597 }