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;
 281
 282         if (dev == NULL) {
 283                 em28xx_isocdbg("dev is null\n");
 284                 return;
 285         }
 286         bytesperline = dev->vbi_width;
 287
 288         if (dma_q == NULL) {
 289                 em28xx_isocdbg("dma_q is null\n");
 290                 return;
 291         }
 292         if (buf == NULL) {
 293                 return;
 294         }
 295         if (p == NULL) {
 296                 em28xx_isocdbg("p is null\n");
 297                 return;
 298         }
 299         if (outp == NULL) {
 300                 em28xx_isocdbg("outp is null\n");
 301                 return;
 302         }
 303
 304         if (dma_q->pos + len > buf->vb.size)
 305                 len = buf->vb.size - dma_q->pos;
 306
 307         startread = p;
 308
 309         startwrite = outp + dma_q->pos;
 310         offset = dma_q->pos;
 311
 312         /* Make sure the bottom field populates the second half of the frame */
 313         if (buf->top_field == 0) {
 314                 startwrite += bytesperline * dev->vbi_height;
 315                 offset += bytesperline * dev->vbi_height;
 316         }
 317
 318         memcpy(startwrite, startread, len);
 319         dma_q->pos += len;
 320 }
 321
 322 static inline void print_err_status(struct em28xx *dev,
 323                                      int packet, int status)
 324 {
 325         char *errmsg = "Unknown";
 326
 327         switch (status) {
 328         case -ENOENT:
 329                 errmsg = "unlinked synchronuously";
 330                 break;
 331         case -ECONNRESET:
 332                 errmsg = "unlinked asynchronuously";
 333                 break;
 334         case -ENOSR:
 335                 errmsg = "Buffer error (overrun)";
 336                 break;
 337         case -EPIPE:
 338                 errmsg = "Stalled (device not responding)";
 339                 break;
 340         case -EOVERFLOW:
 341                 errmsg = "Babble (bad cable?)";
 342                 break;
 343         case -EPROTO:
 344                 errmsg = "Bit-stuff error (bad cable?)";
 345                 break;
 346         case -EILSEQ:
 347                 errmsg = "CRC/Timeout (could be anything)";
 348                 break;
 349         case -ETIME:
 350                 errmsg = "Device does not respond";
 351                 break;
 352         }
 353         if (packet < 0) {
 354                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 355         } else {
 356                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 357                                packet, status, errmsg);
 358         }
 359 }
 360
 361 /*
 362  * video-buf generic routine to get the next available buffer
 363  */
 364 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 365                                           struct em28xx_buffer **buf)
 366 {
 367         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 368         char *outp;
 369
 370         if (list_empty(&dma_q->active)) {
 371                 em28xx_isocdbg("No active queue to serve\n");
 372                 dev->isoc_ctl.vid_buf = NULL;
 373                 *buf = NULL;
 374                 return;
 375         }
 376
 377         /* Get the next buffer */
 378         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 379
 380         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 381         outp = videobuf_to_vmalloc(&(*buf)->vb);
 382         memset(outp, 0, (*buf)->vb.size);
 383
 384         dev->isoc_ctl.vid_buf = *buf;
 385
 386         return;
 387 }
 388
 389 /*
 390  * video-buf generic routine to get the next available VBI buffer
 391  */
 392 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 393                                     struct em28xx_buffer **buf)
 394 {
 395         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 396         char *outp;
 397
 398         if (list_empty(&dma_q->active)) {
 399                 em28xx_isocdbg("No active queue to serve\n");
 400                 dev->isoc_ctl.vbi_buf = NULL;
 401                 *buf = NULL;
 402                 return;
 403         }
 404
 405         /* Get the next buffer */
 406         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 407         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 408         outp = videobuf_to_vmalloc(&(*buf)->vb);
 409         memset(outp, 0x00, (*buf)->vb.size);
 410
 411         dev->isoc_ctl.vbi_buf = *buf;
 412
 413         return;
 414 }
 415
 416 /*
 417  * Controls the isoc copy of each urb packet
 418  */
 419 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 420 {
 421         struct em28xx_buffer    *buf;
 422         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 423         unsigned char *outp = NULL;
 424         int i, len = 0, rc = 1;
 425         unsigned char *p;
 426
 427         if (!dev)
 428                 return 0;
 429
 430         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 431                 return 0;
 432
 433         if (urb->status < 0) {
 434                 print_err_status(dev, -1, urb->status);
 435                 if (urb->status == -ENOENT)
 436                         return 0;
 437         }
 438
 439         buf = dev->isoc_ctl.vid_buf;
 440         if (buf != NULL)
 441                 outp = videobuf_to_vmalloc(&buf->vb);
 442
 443         for (i = 0; i < urb->number_of_packets; i++) {
 444                 int status = urb->iso_frame_desc[i].status;
 445
 446                 if (status < 0) {
 447                         print_err_status(dev, i, status);
 448                         if (urb->iso_frame_desc[i].status != -EPROTO)
 449                                 continue;
 450                 }
 451
 452                 len = urb->iso_frame_desc[i].actual_length - 4;
 453
 454                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 455                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 456                         continue;
 457                 }
 458                 if (urb->iso_frame_desc[i].actual_length >
 459                                                 dev->max_pkt_size) {
 460                         em28xx_isocdbg("packet bigger than packet size");
 461                         continue;
 462                 }
 463
 464                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 465
 466                 /* FIXME: incomplete buffer checks where removed to make
 467                    logic simpler. Impacts of those changes should be evaluated
 468                  */
 469                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 470                         em28xx_isocdbg("VBI HEADER!!!\n");
 471                         /* FIXME: Should add vbi copy */
 472                         continue;
 473                 }
 474                 if (p[0] == 0x22 && p[1] == 0x5a) {
 475                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 476                                        len, (p[2] & 1) ? "odd" : "even");
 477
 478                         if (dev->progressive || !(p[2] & 1)) {
 479                                 if (buf != NULL)
 480                                         buffer_filled(dev, dma_q, buf);
 481                                 get_next_buf(dma_q, &buf);
 482                                 if (buf == NULL)
 483                                         outp = NULL;
 484                                 else
 485                                         outp = videobuf_to_vmalloc(&buf->vb);
 486                         }
 487
 488                         if (buf != NULL) {
 489                                 if (p[2] & 1)
 490                                         buf->top_field = 0;
 491                                 else
 492                                         buf->top_field = 1;
 493                         }
 494
 495                         dma_q->pos = 0;
 496                 }
 497                 if (buf != NULL) {
 498                         if (p[0] != 0x88 && p[0] != 0x22) {
 499                                 em28xx_isocdbg("frame is not complete\n");
 500                                 len += 4;
 501                         } else {
 502                                 p += 4;
 503                         }
 504                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 505                 }
 506         }
 507         return rc;
 508 }
 509
 510 /* Version of isoc handler that takes into account a mixture of video and
 511    VBI data */
 512 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 513 {
 514         struct em28xx_buffer    *buf, *vbi_buf;
 515         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 516         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 517         unsigned char *outp = NULL;
 518         unsigned char *vbioutp = NULL;
 519         int i, len = 0, rc = 1;
 520         unsigned char *p;
 521         int vbi_size;
 522
 523         if (!dev)
 524                 return 0;
 525
 526         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 527                 return 0;
 528
 529         if (urb->status < 0) {
 530                 print_err_status(dev, -1, urb->status);
 531                 if (urb->status == -ENOENT)
 532                         return 0;
 533         }
 534
 535         buf = dev->isoc_ctl.vid_buf;
 536         if (buf != NULL)
 537                 outp = videobuf_to_vmalloc(&buf->vb);
 538
 539         vbi_buf = dev->isoc_ctl.vbi_buf;
 540         if (vbi_buf != NULL)
 541                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 542
 543         for (i = 0; i < urb->number_of_packets; i++) {
 544                 int status = urb->iso_frame_desc[i].status;
 545
 546                 if (status < 0) {
 547                         print_err_status(dev, i, status);
 548                         if (urb->iso_frame_desc[i].status != -EPROTO)
 549                                 continue;
 550                 }
 551
 552                 len = urb->iso_frame_desc[i].actual_length;
 553                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 554                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 555                         continue;
 556                 }
 557                 if (urb->iso_frame_desc[i].actual_length >
 558                                                 dev->max_pkt_size) {
 559                         em28xx_isocdbg("packet bigger than packet size");
 560                         continue;
 561                 }
 562
 563                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 564
 565                 /* capture type 0 = vbi start
 566                    capture type 1 = video start
 567                    capture type 2 = video in progress */
 568                 if (p[0] == 0x33 && p[1] == 0x95) {
 569                         dev->capture_type = 0;
 570                         dev->vbi_read = 0;
 571                         em28xx_isocdbg("VBI START HEADER!!!\n");
 572                         dev->cur_field = p[2];
 573                         p += 4;
 574                         len -= 4;
 575                 } else if (p[0] == 0x88 && p[1] == 0x88 &&
 576                            p[2] == 0x88 && p[3] == 0x88) {
 577                         /* continuation */
 578                         p += 4;
 579                         len -= 4;
 580                 } else if (p[0] == 0x22 && p[1] == 0x5a) {
 581                         /* start video */
 582                         p += 4;
 583                         len -= 4;
 584                 }
 585
 586                 vbi_size = dev->vbi_width * dev->vbi_height;
 587
 588                 if (dev->capture_type == 0) {
 589                         if (dev->vbi_read >= vbi_size) {
 590                                 /* We've already read all the VBI data, so
 591                                    treat the rest as video */
 592                                 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
 593                         } else if ((dev->vbi_read + len) < vbi_size) {
 594                                 /* This entire frame is VBI data */
 595                                 if (dev->vbi_read == 0 &&
 596                                     (!(dev->cur_field & 1))) {
 597                                         /* Brand new frame */
 598                                         if (vbi_buf != NULL)
 599                                                 vbi_buffer_filled(dev,
 600                                                                   vbi_dma_q,
 601                                                                   vbi_buf);
 602                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 603                                         if (vbi_buf == NULL)
 604                                                 vbioutp = NULL;
 605                                         else
 606                                                 vbioutp = videobuf_to_vmalloc(
 607                                                         &vbi_buf->vb);
 608                                 }
 609
 610                                 if (dev->vbi_read == 0) {
 611                                         vbi_dma_q->pos = 0;
 612                                         if (vbi_buf != NULL) {
 613                                                 if (dev->cur_field & 1)
 614                                                         vbi_buf->top_field = 0;
 615                                                 else
 616                                                         vbi_buf->top_field = 1;
 617                                         }
 618                                 }
 619
 620                                 dev->vbi_read += len;
 621                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 622                                                 vbioutp, len);
 623                         } else {
 624                                 /* Some of this frame is VBI data and some is
 625                                    video data */
 626                                 int vbi_data_len = vbi_size - dev->vbi_read;
 627                                 dev->vbi_read += vbi_data_len;
 628                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 629                                                 vbioutp, vbi_data_len);
 630                                 dev->capture_type = 1;
 631                                 p += vbi_data_len;
 632                                 len -= vbi_data_len;
 633                         }
 634                 }
 635
 636                 if (dev->capture_type == 1) {
 637                         dev->capture_type = 2;
 638                         if (dev->progressive || !(dev->cur_field & 1)) {
 639                                 if (buf != NULL)
 640                                         buffer_filled(dev, dma_q, buf);
 641                                 get_next_buf(dma_q, &buf);
 642                                 if (buf == NULL)
 643                                         outp = NULL;
 644                                 else
 645                                         outp = videobuf_to_vmalloc(&buf->vb);
 646                         }
 647                         if (buf != NULL) {
 648                                 if (dev->cur_field & 1)
 649                                         buf->top_field = 0;
 650                                 else
 651                                         buf->top_field = 1;
 652                         }
 653
 654                         dma_q->pos = 0;
 655                 }
 656
 657                 if (buf != NULL && dev->capture_type == 2) {
 658                         if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 &&
 659                             p[2] == 0x88 && p[3] == 0x88) {
 660                                 p += 4;
 661                                 len -= 4;
 662                         }
 663                         if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) {
 664                                 em28xx_isocdbg("Video frame %d, len=%i, %s\n",
 665                                                p[2], len, (p[2] & 1) ?
 666                                                "odd" : "even");
 667                                 p += 4;
 668                                 len -= 4;
 669                         }
 670
 671                         if (len > 0)
 672                                 em28xx_copy_video(dev, dma_q, buf, p, outp,
 673                                                   len);
 674                 }
 675         }
 676         return rc;
 677 }
 678
 679
 680 /* ------------------------------------------------------------------
 681         Videobuf operations
 682    ------------------------------------------------------------------*/
 683
 684 static int
 685 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 686 {
 687         struct em28xx_fh *fh = vq->priv_data;
 688         struct em28xx        *dev = fh->dev;
 689         struct v4l2_frequency f;
 690
 691         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
 692                 >> 3;
 693
 694         if (0 == *count)
 695                 *count = EM28XX_DEF_BUF;
 696
 697         if (*count < EM28XX_MIN_BUF)
 698                 *count = EM28XX_MIN_BUF;
 699
 700         /* Ask tuner to go to analog or radio mode */
 701         memset(&f, 0, sizeof(f));
 702         f.frequency = dev->ctl_freq;
 703         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 704
 705         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 706
 707         return 0;
 708 }
 709
 710 /* This is called *without* dev->slock held; please keep it that way */
 711 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 712 {
 713         struct em28xx_fh     *fh  = vq->priv_data;
 714         struct em28xx        *dev = fh->dev;
 715         unsigned long flags = 0;
 716         if (in_interrupt())
 717                 BUG();
 718
 719         /* We used to wait for the buffer to finish here, but this didn't work
 720            because, as we were keeping the state as VIDEOBUF_QUEUED,
 721            videobuf_queue_cancel marked it as finished for us.
 722            (Also, it could wedge forever if the hardware was misconfigured.)
 723
 724            This should be safe; by the time we get here, the buffer isn't
 725            queued anymore. If we ever start marking the buffers as
 726            VIDEOBUF_ACTIVE, it won't be, though.
 727         */
 728         spin_lock_irqsave(&dev->slock, flags);
 729         if (dev->isoc_ctl.vid_buf == buf)
 730                 dev->isoc_ctl.vid_buf = NULL;
 731         spin_unlock_irqrestore(&dev->slock, flags);
 732
 733         videobuf_vmalloc_free(&buf->vb);
 734         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 735 }
 736
 737 static int
 738 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 739                                                 enum v4l2_field field)
 740 {
 741         struct em28xx_fh     *fh  = vq->priv_data;
 742         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 743         struct em28xx        *dev = fh->dev;
 744         int                  rc = 0, urb_init = 0;
 745
 746         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
 747                         + 7) >> 3;
 748
 749         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 750                 return -EINVAL;
 751
 752         buf->vb.width  = dev->width;
 753         buf->vb.height = dev->height;
 754         buf->vb.field  = field;
 755
 756         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 757                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 758                 if (rc < 0)
 759                         goto fail;
 760         }
 761
 762         if (!dev->isoc_ctl.num_bufs)
 763                 urb_init = 1;
 764
 765         if (urb_init) {
 766                 if (em28xx_vbi_supported(dev) == 1)
 767                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 768                                               EM28XX_NUM_BUFS,
 769                                               dev->max_pkt_size,
 770                                               em28xx_isoc_copy_vbi);
 771                 else
 772                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 773                                               EM28XX_NUM_BUFS,
 774                                               dev->max_pkt_size,
 775                                               em28xx_isoc_copy);
 776                 if (rc < 0)
 777                         goto fail;
 778         }
 779
 780         buf->vb.state = VIDEOBUF_PREPARED;
 781         return 0;
 782
 783 fail:
 784         free_buffer(vq, buf);
 785         return rc;
 786 }
 787
 788 static void
 789 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 790 {
 791         struct em28xx_buffer    *buf     = container_of(vb,
 792                                                         struct em28xx_buffer,
 793                                                         vb);
 794         struct em28xx_fh        *fh      = vq->priv_data;
 795         struct em28xx           *dev     = fh->dev;
 796         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 797
 798         buf->vb.state = VIDEOBUF_QUEUED;
 799         list_add_tail(&buf->vb.queue, &vidq->active);
 800
 801 }
 802
 803 static void buffer_release(struct videobuf_queue *vq,
 804                                 struct videobuf_buffer *vb)
 805 {
 806         struct em28xx_buffer   *buf  = container_of(vb,
 807                                                     struct em28xx_buffer,
 808                                                     vb);
 809         struct em28xx_fh       *fh   = vq->priv_data;
 810         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 811
 812         em28xx_isocdbg("em28xx: called buffer_release\n");
 813
 814         free_buffer(vq, buf);
 815 }
 816
 817 static struct videobuf_queue_ops em28xx_video_qops = {
 818         .buf_setup      = buffer_setup,
 819         .buf_prepare    = buffer_prepare,
 820         .buf_queue      = buffer_queue,
 821         .buf_release    = buffer_release,
 822 };
 823
 824 /*********************  v4l2 interface  **************************************/
 825
 826 static void video_mux(struct em28xx *dev, int index)
 827 {
 828         dev->ctl_input = index;
 829         dev->ctl_ainput = INPUT(index)->amux;
 830         dev->ctl_aoutput = INPUT(index)->aout;
 831
 832         if (!dev->ctl_aoutput)
 833                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 834
 835         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 836                         INPUT(index)->vmux, 0, 0);
 837
 838         if (dev->board.has_msp34xx) {
 839                 if (dev->i2s_speed) {
 840                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 841                                 s_i2s_clock_freq, dev->i2s_speed);
 842                 }
 843                 /* Note: this is msp3400 specific */
 844                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 845                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 846         }
 847
 848         if (dev->board.adecoder != EM28XX_NOADECODER) {
 849                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 850                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 851         }
 852
 853         em28xx_audio_analog_set(dev);
 854 }
 855
 856 /* Usage lock check functions */
 857 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 858 {
 859         struct em28xx    *dev = fh->dev;
 860
 861         if (fh->resources & bit)
 862                 /* have it already allocated */
 863                 return 1;
 864
 865         /* is it free? */
 866         mutex_lock(&dev->lock);
 867         if (dev->resources & bit) {
 868                 /* no, someone else uses it */
 869                 mutex_unlock(&dev->lock);
 870                 return 0;
 871         }
 872         /* it's free, grab it */
 873         fh->resources  |= bit;
 874         dev->resources |= bit;
 875         em28xx_videodbg("res: get %d\n", bit);
 876         mutex_unlock(&dev->lock);
 877         return 1;
 878 }
 879
 880 static int res_check(struct em28xx_fh *fh, unsigned int bit)
 881 {
 882         return fh->resources & bit;
 883 }
 884
 885 static int res_locked(struct em28xx *dev, unsigned int bit)
 886 {
 887         return dev->resources & bit;
 888 }
 889
 890 static void res_free(struct em28xx_fh *fh, unsigned int bits)
 891 {
 892         struct em28xx    *dev = fh->dev;
 893
 894         BUG_ON((fh->resources & bits) != bits);
 895
 896         mutex_lock(&dev->lock);
 897         fh->resources  &= ~bits;
 898         dev->resources &= ~bits;
 899         em28xx_videodbg("res: put %d\n", bits);
 900         mutex_unlock(&dev->lock);
 901 }
 902
 903 static int get_ressource(struct em28xx_fh *fh)
 904 {
 905         switch (fh->type) {
 906         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 907                 return EM28XX_RESOURCE_VIDEO;
 908         case V4L2_BUF_TYPE_VBI_CAPTURE:
 909                 return EM28XX_RESOURCE_VBI;
 910         default:
 911                 BUG();
 912                 return 0;
 913         }
 914 }
 915
 916 /*
 917  * ac97_queryctrl()
 918  * return the ac97 supported controls
 919  */
 920 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 921 {
 922         int i;
 923
 924         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 925                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 926                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 927                         return 0;
 928                 }
 929         }
 930
 931         /* Control is not ac97 related */
 932         return 1;
 933 }
 934
 935 /*
 936  * ac97_get_ctrl()
 937  * return the current values for ac97 mute and volume
 938  */
 939 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 940 {
 941         switch (ctrl->id) {
 942         case V4L2_CID_AUDIO_MUTE:
 943                 ctrl->value = dev->mute;
 944                 return 0;
 945         case V4L2_CID_AUDIO_VOLUME:
 946                 ctrl->value = dev->volume;
 947                 return 0;
 948         default:
 949                 /* Control is not ac97 related */
 950                 return 1;
 951         }
 952 }
 953
 954 /*
 955  * ac97_set_ctrl()
 956  * set values for ac97 mute and volume
 957  */
 958 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 959 {
 960         int i;
 961
 962         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 963                 if (ctrl->id == ac97_qctrl[i].id)
 964                         goto handle;
 965
 966         /* Announce that hasn't handle it */
 967         return 1;
 968
 969 handle:
 970         if (ctrl->value < ac97_qctrl[i].minimum ||
 971             ctrl->value > ac97_qctrl[i].maximum)
 972                 return -ERANGE;
 973
 974         switch (ctrl->id) {
 975         case V4L2_CID_AUDIO_MUTE:
 976                 dev->mute = ctrl->value;
 977                 break;
 978         case V4L2_CID_AUDIO_VOLUME:
 979                 dev->volume = ctrl->value;
 980                 break;
 981         }
 982
 983         return em28xx_audio_analog_set(dev);
 984 }
 985
 986 static int check_dev(struct em28xx *dev)
 987 {
 988         if (dev->state & DEV_DISCONNECTED) {
 989                 em28xx_errdev("v4l2 ioctl: device not present\n");
 990                 return -ENODEV;
 991         }
 992
 993         if (dev->state & DEV_MISCONFIGURED) {
 994                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 995                               "close and open it again\n");
 996                 return -EIO;
 997         }
 998         return 0;
 999 }
1000
1001 static void get_scale(struct em28xx *dev,
1002                         unsigned int width, unsigned int height,
1003                         unsigned int *hscale, unsigned int *vscale)
1004 {
1005         unsigned int          maxw = norm_maxw(dev);
1006         unsigned int          maxh = norm_maxh(dev);
1007
1008         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1009         if (*hscale >= 0x4000)
1010                 *hscale = 0x3fff;
1011
1012         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1013         if (*vscale >= 0x4000)
1014                 *vscale = 0x3fff;
1015 }
1016
1017 /* ------------------------------------------------------------------
1018         IOCTL vidioc handling
1019    ------------------------------------------------------------------*/
1020
1021 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1022                                         struct v4l2_format *f)
1023 {
1024         struct em28xx_fh      *fh  = priv;
1025         struct em28xx         *dev = fh->dev;
1026
1027         mutex_lock(&dev->lock);
1028
1029         f->fmt.pix.width = dev->width;
1030         f->fmt.pix.height = dev->height;
1031         f->fmt.pix.pixelformat = dev->format->fourcc;
1032         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1033         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1034         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1035
1036         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1037         if (dev->progressive)
1038                 f->fmt.pix.field = V4L2_FIELD_NONE;
1039         else
1040                 f->fmt.pix.field = dev->interlaced ?
1041                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1042
1043         mutex_unlock(&dev->lock);
1044         return 0;
1045 }
1046
1047 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1048 {
1049         unsigned int i;
1050
1051         for (i = 0; i < ARRAY_SIZE(format); i++)
1052                 if (format[i].fourcc == fourcc)
1053                         return &format[i];
1054
1055         return NULL;
1056 }
1057
1058 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1059                         struct v4l2_format *f)
1060 {
1061         struct em28xx_fh      *fh    = priv;
1062         struct em28xx         *dev   = fh->dev;
1063         unsigned int          width  = f->fmt.pix.width;
1064         unsigned int          height = f->fmt.pix.height;
1065         unsigned int          maxw   = norm_maxw(dev);
1066         unsigned int          maxh   = norm_maxh(dev);
1067         unsigned int          hscale, vscale;
1068         struct em28xx_fmt     *fmt;
1069
1070         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1071         if (!fmt) {
1072                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1073                                 f->fmt.pix.pixelformat);
1074                 return -EINVAL;
1075         }
1076
1077         if (dev->board.is_em2800) {
1078                 /* the em2800 can only scale down to 50% */
1079                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1080                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1081         } else {
1082                 /* width must even because of the YUYV format
1083                    height must be even because of interlacing */
1084                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1085                                       1, 0);
1086         }
1087
1088         get_scale(dev, width, height, &hscale, &vscale);
1089
1090         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1091         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1092
1093         f->fmt.pix.width = width;
1094         f->fmt.pix.height = height;
1095         f->fmt.pix.pixelformat = fmt->fourcc;
1096         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1097         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1098         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1099         if (dev->progressive)
1100                 f->fmt.pix.field = V4L2_FIELD_NONE;
1101         else
1102                 f->fmt.pix.field = dev->interlaced ?
1103                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1104
1105         return 0;
1106 }
1107
1108 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1109                                    unsigned width, unsigned height)
1110 {
1111         struct em28xx_fmt     *fmt;
1112
1113         fmt = format_by_fourcc(fourcc);
1114         if (!fmt)
1115                 return -EINVAL;
1116
1117         dev->format = fmt;
1118         dev->width  = width;
1119         dev->height = height;
1120
1121         /* set new image size */
1122         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1123
1124         em28xx_set_alternate(dev);
1125         em28xx_resolution_set(dev);
1126
1127         return 0;
1128 }
1129
1130 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1131                         struct v4l2_format *f)
1132 {
1133         struct em28xx_fh      *fh  = priv;
1134         struct em28xx         *dev = fh->dev;
1135         int                   rc;
1136
1137         rc = check_dev(dev);
1138         if (rc < 0)
1139                 return rc;
1140
1141         mutex_lock(&dev->lock);
1142
1143         vidioc_try_fmt_vid_cap(file, priv, f);
1144
1145         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1146                 em28xx_errdev("%s queue busy\n", __func__);
1147                 rc = -EBUSY;
1148                 goto out;
1149         }
1150
1151         rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1152                                 f->fmt.pix.width, f->fmt.pix.height);
1153
1154 out:
1155         mutex_unlock(&dev->lock);
1156         return rc;
1157 }
1158
1159 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1160 {
1161         struct em28xx_fh   *fh  = priv;
1162         struct em28xx      *dev = fh->dev;
1163         int                rc;
1164
1165         rc = check_dev(dev);
1166         if (rc < 0)
1167                 return rc;
1168
1169         *norm = dev->norm;
1170
1171         return 0;
1172 }
1173
1174 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1175 {
1176         struct em28xx_fh   *fh  = priv;
1177         struct em28xx      *dev = fh->dev;
1178         struct v4l2_format f;
1179         int                rc;
1180
1181         rc = check_dev(dev);
1182         if (rc < 0)
1183                 return rc;
1184
1185         mutex_lock(&dev->lock);
1186         dev->norm = *norm;
1187
1188         /* Adjusts width/height, if needed */
1189         f.fmt.pix.width = dev->width;
1190         f.fmt.pix.height = dev->height;
1191         vidioc_try_fmt_vid_cap(file, priv, &f);
1192
1193         /* set new image size */
1194         dev->width = f.fmt.pix.width;
1195         dev->height = f.fmt.pix.height;
1196         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1197
1198         em28xx_resolution_set(dev);
1199         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1200
1201         mutex_unlock(&dev->lock);
1202         return 0;
1203 }
1204
1205 static int vidioc_g_parm(struct file *file, void *priv,
1206                          struct v4l2_streamparm *p)
1207 {
1208         struct em28xx_fh   *fh  = priv;
1209         struct em28xx      *dev = fh->dev;
1210         int rc = 0;
1211
1212         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1213                 return -EINVAL;
1214
1215         if (dev->board.is_webcam)
1216                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1217                                                 video, g_parm, p);
1218         else
1219                 v4l2_video_std_frame_period(dev->norm,
1220                                                  &p->parm.capture.timeperframe);
1221
1222         return rc;
1223 }
1224
1225 static int vidioc_s_parm(struct file *file, void *priv,
1226                          struct v4l2_streamparm *p)
1227 {
1228         struct em28xx_fh   *fh  = priv;
1229         struct em28xx      *dev = fh->dev;
1230
1231         if (!dev->board.is_webcam)
1232                 return -EINVAL;
1233
1234         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1235                 return -EINVAL;
1236
1237         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1238 }
1239
1240 static const char *iname[] = {
1241         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1242         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1243         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1244         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1245         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1246         [EM28XX_VMUX_TELEVISION] = "Television",
1247         [EM28XX_VMUX_CABLE]      = "Cable TV",
1248         [EM28XX_VMUX_DVB]        = "DVB",
1249         [EM28XX_VMUX_DEBUG]      = "for debug only",
1250 };
1251
1252 static int vidioc_enum_input(struct file *file, void *priv,
1253                                 struct v4l2_input *i)
1254 {
1255         struct em28xx_fh   *fh  = priv;
1256         struct em28xx      *dev = fh->dev;
1257         unsigned int       n;
1258
1259         n = i->index;
1260         if (n >= MAX_EM28XX_INPUT)
1261                 return -EINVAL;
1262         if (0 == INPUT(n)->type)
1263                 return -EINVAL;
1264
1265         i->index = n;
1266         i->type = V4L2_INPUT_TYPE_CAMERA;
1267
1268         strcpy(i->name, iname[INPUT(n)->type]);
1269
1270         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1271                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1272                 i->type = V4L2_INPUT_TYPE_TUNER;
1273
1274         i->std = dev->vdev->tvnorms;
1275
1276         return 0;
1277 }
1278
1279 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1280 {
1281         struct em28xx_fh   *fh  = priv;
1282         struct em28xx      *dev = fh->dev;
1283
1284         *i = dev->ctl_input;
1285
1286         return 0;
1287 }
1288
1289 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1290 {
1291         struct em28xx_fh   *fh  = priv;
1292         struct em28xx      *dev = fh->dev;
1293         int                rc;
1294
1295         rc = check_dev(dev);
1296         if (rc < 0)
1297                 return rc;
1298
1299         if (i >= MAX_EM28XX_INPUT)
1300                 return -EINVAL;
1301         if (0 == INPUT(i)->type)
1302                 return -EINVAL;
1303
1304         dev->ctl_input = i;
1305
1306         mutex_lock(&dev->lock);
1307         video_mux(dev, dev->ctl_input);
1308         mutex_unlock(&dev->lock);
1309         return 0;
1310 }
1311
1312 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1313 {
1314         struct em28xx_fh   *fh    = priv;
1315         struct em28xx      *dev   = fh->dev;
1316
1317         if (!dev->audio_mode.has_audio)
1318                 return -EINVAL;
1319
1320         switch (a->index) {
1321         case EM28XX_AMUX_VIDEO:
1322                 strcpy(a->name, "Television");
1323                 break;
1324         case EM28XX_AMUX_LINE_IN:
1325                 strcpy(a->name, "Line In");
1326                 break;
1327         case EM28XX_AMUX_VIDEO2:
1328                 strcpy(a->name, "Television alt");
1329                 break;
1330         case EM28XX_AMUX_PHONE:
1331                 strcpy(a->name, "Phone");
1332                 break;
1333         case EM28XX_AMUX_MIC:
1334                 strcpy(a->name, "Mic");
1335                 break;
1336         case EM28XX_AMUX_CD:
1337                 strcpy(a->name, "CD");
1338                 break;
1339         case EM28XX_AMUX_AUX:
1340                 strcpy(a->name, "Aux");
1341                 break;
1342         case EM28XX_AMUX_PCM_OUT:
1343                 strcpy(a->name, "PCM");
1344                 break;
1345         default:
1346                 return -EINVAL;
1347         }
1348
1349         a->index = dev->ctl_ainput;
1350         a->capability = V4L2_AUDCAP_STEREO;
1351
1352         return 0;
1353 }
1354
1355 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1356 {
1357         struct em28xx_fh   *fh  = priv;
1358         struct em28xx      *dev = fh->dev;
1359
1360
1361         if (!dev->audio_mode.has_audio)
1362                 return -EINVAL;
1363
1364         if (a->index >= MAX_EM28XX_INPUT)
1365                 return -EINVAL;
1366         if (0 == INPUT(a->index)->type)
1367                 return -EINVAL;
1368
1369         mutex_lock(&dev->lock);
1370
1371         dev->ctl_ainput = INPUT(a->index)->amux;
1372         dev->ctl_aoutput = INPUT(a->index)->aout;
1373
1374         if (!dev->ctl_aoutput)
1375                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1376
1377         mutex_unlock(&dev->lock);
1378         return 0;
1379 }
1380
1381 static int vidioc_queryctrl(struct file *file, void *priv,
1382                                 struct v4l2_queryctrl *qc)
1383 {
1384         struct em28xx_fh      *fh  = priv;
1385         struct em28xx         *dev = fh->dev;
1386         int                   id  = qc->id;
1387         int                   rc;
1388
1389         rc = check_dev(dev);
1390         if (rc < 0)
1391                 return rc;
1392
1393         memset(qc, 0, sizeof(*qc));
1394
1395         qc->id = id;
1396
1397         /* enumberate AC97 controls */
1398         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1399                 rc = ac97_queryctrl(qc);
1400                 if (!rc)
1401                         return 0;
1402         }
1403
1404         /* enumberate V4L2 device controls */
1405         mutex_lock(&dev->lock);
1406         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1407         mutex_unlock(&dev->lock);
1408
1409         if (qc->type)
1410                 return 0;
1411         else
1412                 return -EINVAL;
1413 }
1414
1415 static int vidioc_g_ctrl(struct file *file, void *priv,
1416                                 struct v4l2_control *ctrl)
1417 {
1418         struct em28xx_fh      *fh  = priv;
1419         struct em28xx         *dev = fh->dev;
1420         int                   rc;
1421
1422         rc = check_dev(dev);
1423         if (rc < 0)
1424                 return rc;
1425         rc = 0;
1426
1427         mutex_lock(&dev->lock);
1428
1429         /* Set an AC97 control */
1430         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1431                 rc = ac97_get_ctrl(dev, ctrl);
1432         else
1433                 rc = 1;
1434
1435         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1436         if (rc == 1) {
1437                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1438                 rc = 0;
1439         }
1440
1441         mutex_unlock(&dev->lock);
1442         return rc;
1443 }
1444
1445 static int vidioc_s_ctrl(struct file *file, void *priv,
1446                                 struct v4l2_control *ctrl)
1447 {
1448         struct em28xx_fh      *fh  = priv;
1449         struct em28xx         *dev = fh->dev;
1450         int                   rc;
1451
1452         rc = check_dev(dev);
1453         if (rc < 0)
1454                 return rc;
1455
1456         mutex_lock(&dev->lock);
1457
1458         /* Set an AC97 control */
1459         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1460                 rc = ac97_set_ctrl(dev, ctrl);
1461         else
1462                 rc = 1;
1463
1464         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1465         if (rc == 1) {
1466                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1467
1468                 /*
1469                  * In the case of non-AC97 volume controls, we still need
1470                  * to do some setups at em28xx, in order to mute/unmute
1471                  * and to adjust audio volume. However, the value ranges
1472                  * should be checked by the corresponding V4L subdriver.
1473                  */
1474                 switch (ctrl->id) {
1475                 case V4L2_CID_AUDIO_MUTE:
1476                         dev->mute = ctrl->value;
1477                         rc = em28xx_audio_analog_set(dev);
1478                         break;
1479                 case V4L2_CID_AUDIO_VOLUME:
1480                         dev->volume = ctrl->value;
1481                         rc = em28xx_audio_analog_set(dev);
1482                 }
1483         }
1484
1485         mutex_unlock(&dev->lock);
1486         return rc;
1487 }
1488
1489 static int vidioc_g_tuner(struct file *file, void *priv,
1490                                 struct v4l2_tuner *t)
1491 {
1492         struct em28xx_fh      *fh  = priv;
1493         struct em28xx         *dev = fh->dev;
1494         int                   rc;
1495
1496         rc = check_dev(dev);
1497         if (rc < 0)
1498                 return rc;
1499
1500         if (0 != t->index)
1501                 return -EINVAL;
1502
1503         strcpy(t->name, "Tuner");
1504         t->type = V4L2_TUNER_ANALOG_TV;
1505
1506         mutex_lock(&dev->lock);
1507         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1508         mutex_unlock(&dev->lock);
1509
1510         return 0;
1511 }
1512
1513 static int vidioc_s_tuner(struct file *file, void *priv,
1514                                 struct v4l2_tuner *t)
1515 {
1516         struct em28xx_fh      *fh  = priv;
1517         struct em28xx         *dev = fh->dev;
1518         int                   rc;
1519
1520         rc = check_dev(dev);
1521         if (rc < 0)
1522                 return rc;
1523
1524         if (0 != t->index)
1525                 return -EINVAL;
1526
1527         mutex_lock(&dev->lock);
1528         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1529         mutex_unlock(&dev->lock);
1530
1531         return 0;
1532 }
1533
1534 static int vidioc_g_frequency(struct file *file, void *priv,
1535                                 struct v4l2_frequency *f)
1536 {
1537         struct em28xx_fh      *fh  = priv;
1538         struct em28xx         *dev = fh->dev;
1539
1540         mutex_lock(&dev->lock);
1541         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1542         f->frequency = dev->ctl_freq;
1543         mutex_unlock(&dev->lock);
1544
1545         return 0;
1546 }
1547
1548 static int vidioc_s_frequency(struct file *file, void *priv,
1549                                 struct v4l2_frequency *f)
1550 {
1551         struct em28xx_fh      *fh  = priv;
1552         struct em28xx         *dev = fh->dev;
1553         int                   rc;
1554
1555         rc = check_dev(dev);
1556         if (rc < 0)
1557                 return rc;
1558
1559         if (0 != f->tuner)
1560                 return -EINVAL;
1561
1562         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1563                 return -EINVAL;
1564         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1565                 return -EINVAL;
1566
1567         mutex_lock(&dev->lock);
1568
1569         dev->ctl_freq = f->frequency;
1570         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1571
1572         mutex_unlock(&dev->lock);
1573
1574         return 0;
1575 }
1576
1577 #ifdef CONFIG_VIDEO_ADV_DEBUG
1578 static int em28xx_reg_len(int reg)
1579 {
1580         switch (reg) {
1581         case EM28XX_R40_AC97LSB:
1582         case EM28XX_R30_HSCALELOW:
1583         case EM28XX_R32_VSCALELOW:
1584                 return 2;
1585         default:
1586                 return 1;
1587         }
1588 }
1589
1590 static int vidioc_g_chip_ident(struct file *file, void *priv,
1591                struct v4l2_dbg_chip_ident *chip)
1592 {
1593         struct em28xx_fh      *fh  = priv;
1594         struct em28xx         *dev = fh->dev;
1595
1596         chip->ident = V4L2_IDENT_NONE;
1597         chip->revision = 0;
1598
1599         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1600
1601         return 0;
1602 }
1603
1604
1605 static int vidioc_g_register(struct file *file, void *priv,
1606                              struct v4l2_dbg_register *reg)
1607 {
1608         struct em28xx_fh      *fh  = priv;
1609         struct em28xx         *dev = fh->dev;
1610         int ret;
1611
1612         switch (reg->match.type) {
1613         case V4L2_CHIP_MATCH_AC97:
1614                 mutex_lock(&dev->lock);
1615                 ret = em28xx_read_ac97(dev, reg->reg);
1616                 mutex_unlock(&dev->lock);
1617                 if (ret < 0)
1618                         return ret;
1619
1620                 reg->val = ret;
1621                 reg->size = 1;
1622                 return 0;
1623         case V4L2_CHIP_MATCH_I2C_DRIVER:
1624                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1625                 return 0;
1626         case V4L2_CHIP_MATCH_I2C_ADDR:
1627                 /* TODO: is this correct? */
1628                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1629                 return 0;
1630         default:
1631                 if (!v4l2_chip_match_host(&reg->match))
1632                         return -EINVAL;
1633         }
1634
1635         /* Match host */
1636         reg->size = em28xx_reg_len(reg->reg);
1637         if (reg->size == 1) {
1638                 mutex_lock(&dev->lock);
1639                 ret = em28xx_read_reg(dev, reg->reg);
1640                 mutex_unlock(&dev->lock);
1641
1642                 if (ret < 0)
1643                         return ret;
1644
1645                 reg->val = ret;
1646         } else {
1647                 __le16 val = 0;
1648                 mutex_lock(&dev->lock);
1649                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1650                                                    reg->reg, (char *)&val, 2);
1651                 mutex_unlock(&dev->lock);
1652                 if (ret < 0)
1653                         return ret;
1654
1655                 reg->val = le16_to_cpu(val);
1656         }
1657
1658         return 0;
1659 }
1660
1661 static int vidioc_s_register(struct file *file, void *priv,
1662                              struct v4l2_dbg_register *reg)
1663 {
1664         struct em28xx_fh      *fh  = priv;
1665         struct em28xx         *dev = fh->dev;
1666         __le16 buf;
1667         int    rc;
1668
1669         switch (reg->match.type) {
1670         case V4L2_CHIP_MATCH_AC97:
1671                 mutex_lock(&dev->lock);
1672                 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1673                 mutex_unlock(&dev->lock);
1674
1675                 return rc;
1676         case V4L2_CHIP_MATCH_I2C_DRIVER:
1677                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1678                 return 0;
1679         case V4L2_CHIP_MATCH_I2C_ADDR:
1680                 /* TODO: is this correct? */
1681                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1682                 return 0;
1683         default:
1684                 if (!v4l2_chip_match_host(&reg->match))
1685                         return -EINVAL;
1686         }
1687
1688         /* Match host */
1689         buf = cpu_to_le16(reg->val);
1690
1691         mutex_lock(&dev->lock);
1692         rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1693                                em28xx_reg_len(reg->reg));
1694         mutex_unlock(&dev->lock);
1695
1696         return rc;
1697 }
1698 #endif
1699
1700
1701 static int vidioc_cropcap(struct file *file, void *priv,
1702                                         struct v4l2_cropcap *cc)
1703 {
1704         struct em28xx_fh      *fh  = priv;
1705         struct em28xx         *dev = fh->dev;
1706
1707         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1708                 return -EINVAL;
1709
1710         cc->bounds.left = 0;
1711         cc->bounds.top = 0;
1712         cc->bounds.width = dev->width;
1713         cc->bounds.height = dev->height;
1714         cc->defrect = cc->bounds;
1715         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1716         cc->pixelaspect.denominator = 59;
1717
1718         return 0;
1719 }
1720
1721 static int vidioc_streamon(struct file *file, void *priv,
1722                                         enum v4l2_buf_type type)
1723 {
1724         struct em28xx_fh      *fh  = priv;
1725         struct em28xx         *dev = fh->dev;
1726         int                   rc = -EINVAL;
1727
1728         rc = check_dev(dev);
1729         if (rc < 0)
1730                 return rc;
1731
1732         if (unlikely(type != fh->type))
1733                 return -EINVAL;
1734
1735         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1736                         fh, type, fh->resources, dev->resources);
1737
1738         if (unlikely(!res_get(fh, get_ressource(fh))))
1739                 return -EBUSY;
1740
1741         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1742                 rc = videobuf_streamon(&fh->vb_vidq);
1743         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1744                 rc = videobuf_streamon(&fh->vb_vbiq);
1745
1746         return rc;
1747 }
1748
1749 static int vidioc_streamoff(struct file *file, void *priv,
1750                                         enum v4l2_buf_type type)
1751 {
1752         struct em28xx_fh      *fh  = priv;
1753         struct em28xx         *dev = fh->dev;
1754         int                   rc;
1755
1756         rc = check_dev(dev);
1757         if (rc < 0)
1758                 return rc;
1759
1760         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1761             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1762                 return -EINVAL;
1763         if (type != fh->type)
1764                 return -EINVAL;
1765
1766         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1767                         fh, type, fh->resources, dev->resources);
1768
1769         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1770                 videobuf_streamoff(&fh->vb_vidq);
1771                 res_free(fh, EM28XX_RESOURCE_VIDEO);
1772         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1773                 videobuf_streamoff(&fh->vb_vbiq);
1774                 res_free(fh, EM28XX_RESOURCE_VBI);
1775         }
1776
1777         return 0;
1778 }
1779
1780 static int vidioc_querycap(struct file *file, void  *priv,
1781                                         struct v4l2_capability *cap)
1782 {
1783         struct em28xx_fh      *fh  = priv;
1784         struct em28xx         *dev = fh->dev;
1785
1786         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1787         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1788         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1789
1790         cap->version = EM28XX_VERSION_CODE;
1791
1792         cap->capabilities =
1793                         V4L2_CAP_SLICED_VBI_CAPTURE |
1794                         V4L2_CAP_VIDEO_CAPTURE |
1795                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1796
1797         if (dev->vbi_dev)
1798                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1799
1800         if (dev->audio_mode.has_audio)
1801                 cap->capabilities |= V4L2_CAP_AUDIO;
1802
1803         if (dev->tuner_type != TUNER_ABSENT)
1804                 cap->capabilities |= V4L2_CAP_TUNER;
1805
1806         return 0;
1807 }
1808
1809 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1810                                         struct v4l2_fmtdesc *f)
1811 {
1812         if (unlikely(f->index >= ARRAY_SIZE(format)))
1813                 return -EINVAL;
1814
1815         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1816         f->pixelformat = format[f->index].fourcc;
1817
1818         return 0;
1819 }
1820
1821 /* Sliced VBI ioctls */
1822 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1823                                         struct v4l2_format *f)
1824 {
1825         struct em28xx_fh      *fh  = priv;
1826         struct em28xx         *dev = fh->dev;
1827         int                   rc;
1828
1829         rc = check_dev(dev);
1830         if (rc < 0)
1831                 return rc;
1832
1833         mutex_lock(&dev->lock);
1834
1835         f->fmt.sliced.service_set = 0;
1836         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1837
1838         if (f->fmt.sliced.service_set == 0)
1839                 rc = -EINVAL;
1840
1841         mutex_unlock(&dev->lock);
1842
1843         return rc;
1844 }
1845
1846 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1847                         struct v4l2_format *f)
1848 {
1849         struct em28xx_fh      *fh  = priv;
1850         struct em28xx         *dev = fh->dev;
1851         int                   rc;
1852
1853         rc = check_dev(dev);
1854         if (rc < 0)
1855                 return rc;
1856
1857         mutex_lock(&dev->lock);
1858         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1859         mutex_unlock(&dev->lock);
1860
1861         if (f->fmt.sliced.service_set == 0)
1862                 return -EINVAL;
1863
1864         return 0;
1865 }
1866
1867 /* RAW VBI ioctls */
1868
1869 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1870                                 struct v4l2_format *format)
1871 {
1872         struct em28xx_fh      *fh  = priv;
1873         struct em28xx         *dev = fh->dev;
1874
1875         format->fmt.vbi.samples_per_line = dev->vbi_width;
1876         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1877         format->fmt.vbi.offset = 0;
1878         format->fmt.vbi.flags = 0;
1879         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1880         format->fmt.vbi.count[0] = dev->vbi_height;
1881         format->fmt.vbi.count[1] = dev->vbi_height;
1882
1883         /* Varies by video standard (NTSC, PAL, etc.) */
1884         if (dev->norm & V4L2_STD_525_60) {
1885                 /* NTSC */
1886                 format->fmt.vbi.start[0] = 10;
1887                 format->fmt.vbi.start[1] = 273;
1888         } else if (dev->norm & V4L2_STD_625_50) {
1889                 /* PAL */
1890                 format->fmt.vbi.start[0] = 6;
1891                 format->fmt.vbi.start[1] = 318;
1892         }
1893
1894         return 0;
1895 }
1896
1897 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1898                                 struct v4l2_format *format)
1899 {
1900         struct em28xx_fh      *fh  = priv;
1901         struct em28xx         *dev = fh->dev;
1902
1903         format->fmt.vbi.samples_per_line = dev->vbi_width;
1904         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1905         format->fmt.vbi.offset = 0;
1906         format->fmt.vbi.flags = 0;
1907         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1908         format->fmt.vbi.count[0] = dev->vbi_height;
1909         format->fmt.vbi.count[1] = dev->vbi_height;
1910
1911         /* Varies by video standard (NTSC, PAL, etc.) */
1912         if (dev->norm & V4L2_STD_525_60) {
1913                 /* NTSC */
1914                 format->fmt.vbi.start[0] = 10;
1915                 format->fmt.vbi.start[1] = 273;
1916         } else if (dev->norm & V4L2_STD_625_50) {
1917                 /* PAL */
1918                 format->fmt.vbi.start[0] = 6;
1919                 format->fmt.vbi.start[1] = 318;
1920         }
1921
1922         return 0;
1923 }
1924
1925 static int vidioc_reqbufs(struct file *file, void *priv,
1926                           struct v4l2_requestbuffers *rb)
1927 {
1928         struct em28xx_fh      *fh  = priv;
1929         struct em28xx         *dev = fh->dev;
1930         int                   rc;
1931
1932         rc = check_dev(dev);
1933         if (rc < 0)
1934                 return rc;
1935
1936         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1937                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1938         else
1939                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1940 }
1941
1942 static int vidioc_querybuf(struct file *file, void *priv,
1943                            struct v4l2_buffer *b)
1944 {
1945         struct em28xx_fh      *fh  = priv;
1946         struct em28xx         *dev = fh->dev;
1947         int                   rc;
1948
1949         rc = check_dev(dev);
1950         if (rc < 0)
1951                 return rc;
1952
1953         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1954                 return videobuf_querybuf(&fh->vb_vidq, b);
1955         else {
1956                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1957                    the videobuf framework, but we probably shouldn't be
1958                    returning a buffer larger than that which was asked for.
1959                    At a minimum, it causes a crash in zvbi since it does
1960                    a memcpy based on the source buffer length */
1961                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1962                 b->length = dev->vbi_width * dev->vbi_height * 2;
1963
1964                 return result;
1965         }
1966 }
1967
1968 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1969 {
1970         struct em28xx_fh      *fh  = priv;
1971         struct em28xx         *dev = fh->dev;
1972         int                   rc;
1973
1974         rc = check_dev(dev);
1975         if (rc < 0)
1976                 return rc;
1977
1978         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1979                 return videobuf_qbuf(&fh->vb_vidq, b);
1980         else
1981                 return videobuf_qbuf(&fh->vb_vbiq, b);
1982 }
1983
1984 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1985 {
1986         struct em28xx_fh      *fh  = priv;
1987         struct em28xx         *dev = fh->dev;
1988         int                   rc;
1989
1990         rc = check_dev(dev);
1991         if (rc < 0)
1992                 return rc;
1993
1994         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1995                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1996                                       O_NONBLOCK);
1997         else
1998                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1999                                       O_NONBLOCK);
2000 }
2001
2002 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2003 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
2004 {
2005         struct em28xx_fh  *fh = priv;
2006
2007         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2008                 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
2009         else
2010                 return videobuf_cgmbuf(&fh->vb_vbiq, mbuf, 8);
2011 }
2012 #endif
2013
2014
2015 /* ----------------------------------------------------------- */
2016 /* RADIO ESPECIFIC IOCTLS                                      */
2017 /* ----------------------------------------------------------- */
2018
2019 static int radio_querycap(struct file *file, void  *priv,
2020                           struct v4l2_capability *cap)
2021 {
2022         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2023
2024         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
2025         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
2026         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
2027
2028         cap->version = EM28XX_VERSION_CODE;
2029         cap->capabilities = V4L2_CAP_TUNER;
2030         return 0;
2031 }
2032
2033 static int radio_g_tuner(struct file *file, void *priv,
2034                          struct v4l2_tuner *t)
2035 {
2036         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2037
2038         if (unlikely(t->index > 0))
2039                 return -EINVAL;
2040
2041         strcpy(t->name, "Radio");
2042         t->type = V4L2_TUNER_RADIO;
2043
2044         mutex_lock(&dev->lock);
2045         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2046         mutex_unlock(&dev->lock);
2047
2048         return 0;
2049 }
2050
2051 static int radio_enum_input(struct file *file, void *priv,
2052                             struct v4l2_input *i)
2053 {
2054         if (i->index != 0)
2055                 return -EINVAL;
2056         strcpy(i->name, "Radio");
2057         i->type = V4L2_INPUT_TYPE_TUNER;
2058
2059         return 0;
2060 }
2061
2062 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2063 {
2064         if (unlikely(a->index))
2065                 return -EINVAL;
2066
2067         strcpy(a->name, "Radio");
2068         return 0;
2069 }
2070
2071 static int radio_s_tuner(struct file *file, void *priv,
2072                          struct v4l2_tuner *t)
2073 {
2074         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2075
2076         if (0 != t->index)
2077                 return -EINVAL;
2078
2079         mutex_lock(&dev->lock);
2080         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2081         mutex_unlock(&dev->lock);
2082
2083         return 0;
2084 }
2085
2086 static int radio_s_audio(struct file *file, void *fh,
2087                          struct v4l2_audio *a)
2088 {
2089         return 0;
2090 }
2091
2092 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2093 {
2094         return 0;
2095 }
2096
2097 static int radio_queryctrl(struct file *file, void *priv,
2098                            struct v4l2_queryctrl *qc)
2099 {
2100         int i;
2101
2102         if (qc->id <  V4L2_CID_BASE ||
2103                 qc->id >= V4L2_CID_LASTP1)
2104                 return -EINVAL;
2105
2106         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2107                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2108                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2109                         return 0;
2110                 }
2111         }
2112
2113         return -EINVAL;
2114 }
2115
2116 /*
2117  * em28xx_v4l2_open()
2118  * inits the device and starts isoc transfer
2119  */
2120 static int em28xx_v4l2_open(struct file *filp)
2121 {
2122         int errCode = 0, radio = 0;
2123         struct video_device *vdev = video_devdata(filp);
2124         struct em28xx *dev = video_drvdata(filp);
2125         enum v4l2_buf_type fh_type = 0;
2126         struct em28xx_fh *fh;
2127         enum v4l2_field field;
2128
2129         switch (vdev->vfl_type) {
2130         case VFL_TYPE_GRABBER:
2131                 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2132                 break;
2133         case VFL_TYPE_VBI:
2134                 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2135                 break;
2136         case VFL_TYPE_RADIO:
2137                 radio = 1;
2138                 break;
2139         }
2140
2141         mutex_lock(&dev->lock);
2142
2143         em28xx_videodbg("open dev=%s type=%s users=%d\n",
2144                         video_device_node_name(vdev), v4l2_type_names[fh_type],
2145                         dev->users);
2146
2147
2148         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2149         if (!fh) {
2150                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2151                 mutex_unlock(&dev->lock);
2152                 return -ENOMEM;
2153         }
2154         fh->dev = dev;
2155         fh->radio = radio;
2156         fh->type = fh_type;
2157         filp->private_data = fh;
2158
2159         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2160                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2161                 em28xx_set_alternate(dev);
2162                 em28xx_resolution_set(dev);
2163
2164                 /* Needed, since GPIO might have disabled power of
2165                    some i2c device
2166                  */
2167                 em28xx_wake_i2c(dev);
2168
2169         }
2170         if (fh->radio) {
2171                 em28xx_videodbg("video_open: setting radio device\n");
2172                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2173         }
2174
2175         dev->users++;
2176
2177         if (dev->progressive)
2178                 field = V4L2_FIELD_NONE;
2179         else
2180                 field = V4L2_FIELD_INTERLACED;
2181
2182         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2183                                     NULL, &dev->slock,
2184                                     V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2185                                     sizeof(struct em28xx_buffer), fh, NULL);
2186
2187         videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2188                                     NULL, &dev->slock,
2189                                     V4L2_BUF_TYPE_VBI_CAPTURE,
2190                                     V4L2_FIELD_SEQ_TB,
2191                                     sizeof(struct em28xx_buffer), fh, NULL);
2192
2193         mutex_unlock(&dev->lock);
2194
2195         return errCode;
2196 }
2197
2198 /*
2199  * em28xx_realease_resources()
2200  * unregisters the v4l2,i2c and usb devices
2201  * called when the device gets disconected or at module unload
2202 */
2203 void em28xx_release_analog_resources(struct em28xx *dev)
2204 {
2205
2206         /*FIXME: I2C IR should be disconnected */
2207
2208         if (dev->radio_dev) {
2209                 if (video_is_registered(dev->radio_dev))
2210                         video_unregister_device(dev->radio_dev);
2211                 else
2212                         video_device_release(dev->radio_dev);
2213                 dev->radio_dev = NULL;
2214         }
2215         if (dev->vbi_dev) {
2216                 em28xx_info("V4L2 device %s deregistered\n",
2217                             video_device_node_name(dev->vbi_dev));
2218                 if (video_is_registered(dev->vbi_dev))
2219                         video_unregister_device(dev->vbi_dev);
2220                 else
2221                         video_device_release(dev->vbi_dev);
2222                 dev->vbi_dev = NULL;
2223         }
2224         if (dev->vdev) {
2225                 em28xx_info("V4L2 device %s deregistered\n",
2226                             video_device_node_name(dev->vdev));
2227                 if (video_is_registered(dev->vdev))
2228                         video_unregister_device(dev->vdev);
2229                 else
2230                         video_device_release(dev->vdev);
2231                 dev->vdev = NULL;
2232         }
2233 }
2234
2235 /*
2236  * em28xx_v4l2_close()
2237  * stops streaming and deallocates all resources allocated by the v4l2
2238  * calls and ioctls
2239  */
2240 static int em28xx_v4l2_close(struct file *filp)
2241 {
2242         struct em28xx_fh *fh  = filp->private_data;
2243         struct em28xx    *dev = fh->dev;
2244         int              errCode;
2245
2246         em28xx_videodbg("users=%d\n", dev->users);
2247
2248         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2249                 videobuf_stop(&fh->vb_vidq);
2250                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2251         }
2252
2253         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2254                 videobuf_stop(&fh->vb_vbiq);
2255                 res_free(fh, EM28XX_RESOURCE_VBI);
2256         }
2257
2258         if (dev->users == 1) {
2259                 /* the device is already disconnect,
2260                    free the remaining resources */
2261                 if (dev->state & DEV_DISCONNECTED) {
2262                         em28xx_release_resources(dev);
2263                         kfree(dev);
2264                         return 0;
2265                 }
2266
2267                 /* Save some power by putting tuner to sleep */
2268                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
2269
2270                 /* do this before setting alternate! */
2271                 em28xx_uninit_isoc(dev);
2272                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2273
2274                 /* set alternate 0 */
2275                 dev->alt = 0;
2276                 em28xx_videodbg("setting alternate 0\n");
2277                 errCode = usb_set_interface(dev->udev, 0, 0);
2278                 if (errCode < 0) {
2279                         em28xx_errdev("cannot change alternate number to "
2280                                         "0 (error=%i)\n", errCode);
2281                 }
2282         }
2283
2284         videobuf_mmap_free(&fh->vb_vidq);
2285         videobuf_mmap_free(&fh->vb_vbiq);
2286         kfree(fh);
2287         dev->users--;
2288         wake_up_interruptible_nr(&dev->open, 1);
2289         return 0;
2290 }
2291
2292 /*
2293  * em28xx_v4l2_read()
2294  * will allocate buffers when called for the first time
2295  */
2296 static ssize_t
2297 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2298                  loff_t *pos)
2299 {
2300         struct em28xx_fh *fh = filp->private_data;
2301         struct em28xx *dev = fh->dev;
2302         int rc;
2303
2304         rc = check_dev(dev);
2305         if (rc < 0)
2306                 return rc;
2307
2308         /* FIXME: read() is not prepared to allow changing the video
2309            resolution while streaming. Seems a bug at em28xx_set_fmt
2310          */
2311
2312         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2313                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2314                         return -EBUSY;
2315
2316                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2317                                         filp->f_flags & O_NONBLOCK);
2318         }
2319
2320
2321         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2322                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2323                         return -EBUSY;
2324
2325                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2326                                         filp->f_flags & O_NONBLOCK);
2327         }
2328
2329         return 0;
2330 }
2331
2332 /*
2333  * em28xx_v4l2_poll()
2334  * will allocate buffers when called for the first time
2335  */
2336 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2337 {
2338         struct em28xx_fh *fh = filp->private_data;
2339         struct em28xx *dev = fh->dev;
2340         int rc;
2341
2342         rc = check_dev(dev);
2343         if (rc < 0)
2344                 return rc;
2345
2346         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2347                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2348                         return POLLERR;
2349                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2350         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2351                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2352                         return POLLERR;
2353                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2354         } else {
2355                 return POLLERR;
2356         }
2357 }
2358
2359 /*
2360  * em28xx_v4l2_mmap()
2361  */
2362 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2363 {
2364         struct em28xx_fh *fh    = filp->private_data;
2365         struct em28xx    *dev   = fh->dev;
2366         int              rc;
2367
2368         rc = check_dev(dev);
2369         if (rc < 0)
2370                 return rc;
2371
2372         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2373                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2374         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2375                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2376
2377         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2378                 (unsigned long)vma->vm_start,
2379                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2380                 rc);
2381
2382         return rc;
2383 }
2384
2385 static const struct v4l2_file_operations em28xx_v4l_fops = {
2386         .owner         = THIS_MODULE,
2387         .open          = em28xx_v4l2_open,
2388         .release       = em28xx_v4l2_close,
2389         .read          = em28xx_v4l2_read,
2390         .poll          = em28xx_v4l2_poll,
2391         .mmap          = em28xx_v4l2_mmap,
2392         .ioctl         = video_ioctl2,
2393 };
2394
2395 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2396         .vidioc_querycap            = vidioc_querycap,
2397         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2398         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2399         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2400         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2401         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2402         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2403         .vidioc_g_audio             = vidioc_g_audio,
2404         .vidioc_s_audio             = vidioc_s_audio,
2405         .vidioc_cropcap             = vidioc_cropcap,
2406
2407         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2408         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2409         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2410
2411         .vidioc_reqbufs             = vidioc_reqbufs,
2412         .vidioc_querybuf            = vidioc_querybuf,
2413         .vidioc_qbuf                = vidioc_qbuf,
2414         .vidioc_dqbuf               = vidioc_dqbuf,
2415         .vidioc_g_std               = vidioc_g_std,
2416         .vidioc_s_std               = vidioc_s_std,
2417         .vidioc_g_parm              = vidioc_g_parm,
2418         .vidioc_s_parm              = vidioc_s_parm,
2419         .vidioc_enum_input          = vidioc_enum_input,
2420         .vidioc_g_input             = vidioc_g_input,
2421         .vidioc_s_input             = vidioc_s_input,
2422         .vidioc_queryctrl           = vidioc_queryctrl,
2423         .vidioc_g_ctrl              = vidioc_g_ctrl,
2424         .vidioc_s_ctrl              = vidioc_s_ctrl,
2425         .vidioc_streamon            = vidioc_streamon,
2426         .vidioc_streamoff           = vidioc_streamoff,
2427         .vidioc_g_tuner             = vidioc_g_tuner,
2428         .vidioc_s_tuner             = vidioc_s_tuner,
2429         .vidioc_g_frequency         = vidioc_g_frequency,
2430         .vidioc_s_frequency         = vidioc_s_frequency,
2431 #ifdef CONFIG_VIDEO_ADV_DEBUG
2432         .vidioc_g_register          = vidioc_g_register,
2433         .vidioc_s_register          = vidioc_s_register,
2434         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
2435 #endif
2436 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2437         .vidiocgmbuf                = vidiocgmbuf,
2438 #endif
2439 };
2440
2441 static const struct video_device em28xx_video_template = {
2442         .fops                       = &em28xx_v4l_fops,
2443         .release                    = video_device_release,
2444         .ioctl_ops                  = &video_ioctl_ops,
2445
2446         .tvnorms                    = V4L2_STD_ALL,
2447         .current_norm               = V4L2_STD_PAL,
2448 };
2449
2450 static const struct v4l2_file_operations radio_fops = {
2451         .owner         = THIS_MODULE,
2452         .open          = em28xx_v4l2_open,
2453         .release       = em28xx_v4l2_close,
2454         .ioctl         = video_ioctl2,
2455 };
2456
2457 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2458         .vidioc_querycap      = radio_querycap,
2459         .vidioc_g_tuner       = radio_g_tuner,
2460         .vidioc_enum_input    = radio_enum_input,
2461         .vidioc_g_audio       = radio_g_audio,
2462         .vidioc_s_tuner       = radio_s_tuner,
2463         .vidioc_s_audio       = radio_s_audio,
2464         .vidioc_s_input       = radio_s_input,
2465         .vidioc_queryctrl     = radio_queryctrl,
2466         .vidioc_g_ctrl        = vidioc_g_ctrl,
2467         .vidioc_s_ctrl        = vidioc_s_ctrl,
2468         .vidioc_g_frequency   = vidioc_g_frequency,
2469         .vidioc_s_frequency   = vidioc_s_frequency,
2470 #ifdef CONFIG_VIDEO_ADV_DEBUG
2471         .vidioc_g_register    = vidioc_g_register,
2472         .vidioc_s_register    = vidioc_s_register,
2473 #endif
2474 };
2475
2476 static struct video_device em28xx_radio_template = {
2477         .name                 = "em28xx-radio",
2478         .fops                 = &radio_fops,
2479         .ioctl_ops            = &radio_ioctl_ops,
2480 };
2481
2482 /******************************** usb interface ******************************/
2483
2484
2485
2486 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2487                                         const struct video_device *template,
2488                                         const char *type_name)
2489 {
2490         struct video_device *vfd;
2491
2492         vfd = video_device_alloc();
2493         if (NULL == vfd)
2494                 return NULL;
2495
2496         *vfd            = *template;
2497         vfd->v4l2_dev   = &dev->v4l2_dev;
2498         vfd->release    = video_device_release;
2499         vfd->debug      = video_debug;
2500
2501         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2502                  dev->name, type_name);
2503
2504         video_set_drvdata(vfd, dev);
2505         return vfd;
2506 }
2507
2508 int em28xx_register_analog_devices(struct em28xx *dev)
2509 {
2510       u8 val;
2511         int ret;
2512
2513         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
2514                 dev->name,
2515                 (EM28XX_VERSION_CODE >> 16) & 0xff,
2516                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2517
2518         /* set default norm */
2519         dev->norm = em28xx_video_template.current_norm;
2520         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2521         dev->ctl_input = 0;
2522
2523         /* Analog specific initialization */
2524         dev->format = &format[0];
2525         em28xx_set_video_format(dev, format[0].fourcc,
2526                                 norm_maxw(dev), norm_maxh(dev));
2527
2528         video_mux(dev, dev->ctl_input);
2529
2530         /* Audio defaults */
2531         dev->mute = 1;
2532         dev->volume = 0x1f;
2533
2534 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2535         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2536         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2537                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2538
2539         em28xx_set_outfmt(dev);
2540         em28xx_colorlevels_set_default(dev);
2541         em28xx_compression_disable(dev);
2542
2543         /* allocate and fill video video_device struct */
2544         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2545         if (!dev->vdev) {
2546                 em28xx_errdev("cannot allocate video_device.\n");
2547                 return -ENODEV;
2548         }
2549
2550         /* register v4l2 video video_device */
2551         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2552                                        video_nr[dev->devno]);
2553         if (ret) {
2554                 em28xx_errdev("unable to register video device (error=%i).\n",
2555                               ret);
2556                 return ret;
2557         }
2558
2559         /* Allocate and fill vbi video_device struct */
2560         if (em28xx_vbi_supported(dev) == 1) {
2561                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2562                                                 "vbi");
2563
2564                 /* register v4l2 vbi video_device */
2565                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2566                                             vbi_nr[dev->devno]);
2567                 if (ret < 0) {
2568                         em28xx_errdev("unable to register vbi device\n");
2569                         return ret;
2570                 }
2571         }
2572
2573         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2574                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2575                                                   "radio");
2576                 if (!dev->radio_dev) {
2577                         em28xx_errdev("cannot allocate video_device.\n");
2578                         return -ENODEV;
2579                 }
2580                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2581                                             radio_nr[dev->devno]);
2582                 if (ret < 0) {
2583                         em28xx_errdev("can't register radio device\n");
2584                         return ret;
2585                 }
2586                 em28xx_info("Registered radio device as %s\n",
2587                             video_device_node_name(dev->radio_dev));
2588         }
2589
2590         em28xx_info("V4L2 video device registered as %s\n",
2591                     video_device_node_name(dev->vdev));
2592
2593         if (dev->vbi_dev)
2594                 em28xx_info("V4L2 VBI device registered as %s\n",
2595                             video_device_node_name(dev->vbi_dev));
2596
2597         return 0;
2598 }