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/mm.h>
  36 #include <linux/mutex.h>
  37 #include <linux/slab.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/v4l2-chip-ident.h>
  43 #include <media/msp3400.h>
  44 #include <media/tuner.h>
  45
  46 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  47                       "Markus Rechberger <mrechberger@gmail.com>, " \
  48                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  49                       "Sascha Sommer <saschasommer@freenet.de>"
  50
  51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  52
  53 #define EM28XX_VERSION "0.1.3"
  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 MODULE_VERSION(EM28XX_VERSION);
  76
  77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  80
  81 module_param_array(video_nr, int, NULL, 0444);
  82 module_param_array(vbi_nr, int, NULL, 0444);
  83 module_param_array(radio_nr, int, NULL, 0444);
  84 MODULE_PARM_DESC(video_nr, "video device numbers");
  85 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  87
  88 static unsigned int video_debug;
  89 module_param(video_debug, int, 0644);
  90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  91
  92 /* supported video standards */
  93 static struct em28xx_fmt format[] = {
  94         {
  95                 .name     = "16 bpp YUY2, 4:2:2, packed",
  96                 .fourcc   = V4L2_PIX_FMT_YUYV,
  97                 .depth    = 16,
  98                 .reg      = EM28XX_OUTFMT_YUV422_Y0UY1V,
  99         }, {
 100                 .name     = "16 bpp RGB 565, LE",
 101                 .fourcc   = V4L2_PIX_FMT_RGB565,
 102                 .depth    = 16,
 103                 .reg      = EM28XX_OUTFMT_RGB_16_656,
 104         }, {
 105                 .name     = "8 bpp Bayer BGBG..GRGR",
 106                 .fourcc   = V4L2_PIX_FMT_SBGGR8,
 107                 .depth    = 8,
 108                 .reg      = EM28XX_OUTFMT_RGB_8_BGBG,
 109         }, {
 110                 .name     = "8 bpp Bayer GRGR..BGBG",
 111                 .fourcc   = V4L2_PIX_FMT_SGRBG8,
 112                 .depth    = 8,
 113                 .reg      = EM28XX_OUTFMT_RGB_8_GRGR,
 114         }, {
 115                 .name     = "8 bpp Bayer GBGB..RGRG",
 116                 .fourcc   = V4L2_PIX_FMT_SGBRG8,
 117                 .depth    = 8,
 118                 .reg      = EM28XX_OUTFMT_RGB_8_GBGB,
 119         }, {
 120                 .name     = "12 bpp YUV411",
 121                 .fourcc   = V4L2_PIX_FMT_YUV411P,
 122                 .depth    = 12,
 123                 .reg      = EM28XX_OUTFMT_YUV411,
 124         },
 125 };
 126
 127 /* supported controls */
 128 /* Common to all boards */
 129 static struct v4l2_queryctrl ac97_qctrl[] = {
 130         {
 131                 .id = V4L2_CID_AUDIO_VOLUME,
 132                 .type = V4L2_CTRL_TYPE_INTEGER,
 133                 .name = "Volume",
 134                 .minimum = 0x0,
 135                 .maximum = 0x1f,
 136                 .step = 0x1,
 137                 .default_value = 0x1f,
 138                 .flags = V4L2_CTRL_FLAG_SLIDER,
 139         }, {
 140                 .id = V4L2_CID_AUDIO_MUTE,
 141                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 142                 .name = "Mute",
 143                 .minimum = 0,
 144                 .maximum = 1,
 145                 .step = 1,
 146                 .default_value = 1,
 147                 .flags = 0,
 148         }
 149 };
 150
 151 /* ------------------------------------------------------------------
 152         DMA and thread functions
 153    ------------------------------------------------------------------*/
 154
 155 /*
 156  * Announces that a buffer were filled and request the next
 157  */
 158 static inline void buffer_filled(struct em28xx *dev,
 159                                   struct em28xx_dmaqueue *dma_q,
 160                                   struct em28xx_buffer *buf)
 161 {
 162         /* Advice that buffer was filled */
 163         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 164         buf->vb.state = VIDEOBUF_DONE;
 165         buf->vb.field_count++;
 166         do_gettimeofday(&buf->vb.ts);
 167
 168         dev->isoc_ctl.vid_buf = NULL;
 169
 170         list_del(&buf->vb.queue);
 171         wake_up(&buf->vb.done);
 172 }
 173
 174 static inline void vbi_buffer_filled(struct em28xx *dev,
 175                                      struct em28xx_dmaqueue *dma_q,
 176                                      struct em28xx_buffer *buf)
 177 {
 178         /* Advice that buffer was filled */
 179         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 180
 181         buf->vb.state = VIDEOBUF_DONE;
 182         buf->vb.field_count++;
 183         do_gettimeofday(&buf->vb.ts);
 184
 185         dev->isoc_ctl.vbi_buf = NULL;
 186
 187         list_del(&buf->vb.queue);
 188         wake_up(&buf->vb.done);
 189 }
 190
 191 /*
 192  * Identify the buffer header type and properly handles
 193  */
 194 static void em28xx_copy_video(struct em28xx *dev,
 195                               struct em28xx_dmaqueue  *dma_q,
 196                               struct em28xx_buffer *buf,
 197                               unsigned char *p,
 198                               unsigned char *outp, unsigned long len)
 199 {
 200         void *fieldstart, *startwrite, *startread;
 201         int  linesdone, currlinedone, offset, lencopy, remain;
 202         int bytesperline = dev->width << 1;
 203
 204         if (dma_q->pos + len > buf->vb.size)
 205                 len = buf->vb.size - dma_q->pos;
 206
 207         startread = p;
 208         remain = len;
 209
 210         if (dev->progressive)
 211                 fieldstart = outp;
 212         else {
 213                 /* Interlaces two half frames */
 214                 if (buf->top_field)
 215                         fieldstart = outp;
 216                 else
 217                         fieldstart = outp + bytesperline;
 218         }
 219
 220         linesdone = dma_q->pos / bytesperline;
 221         currlinedone = dma_q->pos % bytesperline;
 222
 223         if (dev->progressive)
 224                 offset = linesdone * bytesperline + currlinedone;
 225         else
 226                 offset = linesdone * bytesperline * 2 + currlinedone;
 227
 228         startwrite = fieldstart + offset;
 229         lencopy = bytesperline - currlinedone;
 230         lencopy = lencopy > remain ? remain : lencopy;
 231
 232         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 233                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 234                                ((char *)startwrite + lencopy) -
 235                                ((char *)outp + buf->vb.size));
 236                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
 237                 lencopy = remain;
 238         }
 239         if (lencopy <= 0)
 240                 return;
 241         memcpy(startwrite, startread, lencopy);
 242
 243         remain -= lencopy;
 244
 245         while (remain > 0) {
 246                 startwrite += lencopy + bytesperline;
 247                 startread += lencopy;
 248                 if (bytesperline > remain)
 249                         lencopy = remain;
 250                 else
 251                         lencopy = bytesperline;
 252
 253                 if ((char *)startwrite + lencopy > (char *)outp +
 254                     buf->vb.size) {
 255                         em28xx_isocdbg("Overflow of %zi bytes past buffer end"
 256                                        "(2)\n",
 257                                        ((char *)startwrite + lencopy) -
 258                                        ((char *)outp + buf->vb.size));
 259                         lencopy = remain = (char *)outp + buf->vb.size -
 260                                            (char *)startwrite;
 261                 }
 262                 if (lencopy <= 0)
 263                         break;
 264
 265                 memcpy(startwrite, startread, lencopy);
 266
 267                 remain -= lencopy;
 268         }
 269
 270         dma_q->pos += len;
 271 }
 272
 273 static void em28xx_copy_vbi(struct em28xx *dev,
 274                               struct em28xx_dmaqueue  *dma_q,
 275                               struct em28xx_buffer *buf,
 276                               unsigned char *p,
 277                               unsigned char *outp, unsigned long len)
 278 {
 279         void *startwrite, *startread;
 280         int  offset;
 281         int bytesperline;
 282
 283         if (dev == NULL) {
 284                 em28xx_isocdbg("dev is null\n");
 285                 return;
 286         }
 287         bytesperline = dev->vbi_width;
 288
 289         if (dma_q == NULL) {
 290                 em28xx_isocdbg("dma_q is null\n");
 291                 return;
 292         }
 293         if (buf == NULL) {
 294                 return;
 295         }
 296         if (p == NULL) {
 297                 em28xx_isocdbg("p is null\n");
 298                 return;
 299         }
 300         if (outp == NULL) {
 301                 em28xx_isocdbg("outp is null\n");
 302                 return;
 303         }
 304
 305         if (dma_q->pos + len > buf->vb.size)
 306                 len = buf->vb.size - dma_q->pos;
 307
 308         startread = p;
 309
 310         startwrite = outp + dma_q->pos;
 311         offset = dma_q->pos;
 312
 313         /* Make sure the bottom field populates the second half of the frame */
 314         if (buf->top_field == 0) {
 315                 startwrite += bytesperline * dev->vbi_height;
 316                 offset += bytesperline * dev->vbi_height;
 317         }
 318
 319         memcpy(startwrite, startread, len);
 320         dma_q->pos += len;
 321 }
 322
 323 static inline void print_err_status(struct em28xx *dev,
 324                                      int packet, int status)
 325 {
 326         char *errmsg = "Unknown";
 327
 328         switch (status) {
 329         case -ENOENT:
 330                 errmsg = "unlinked synchronuously";
 331                 break;
 332         case -ECONNRESET:
 333                 errmsg = "unlinked asynchronuously";
 334                 break;
 335         case -ENOSR:
 336                 errmsg = "Buffer error (overrun)";
 337                 break;
 338         case -EPIPE:
 339                 errmsg = "Stalled (device not responding)";
 340                 break;
 341         case -EOVERFLOW:
 342                 errmsg = "Babble (bad cable?)";
 343                 break;
 344         case -EPROTO:
 345                 errmsg = "Bit-stuff error (bad cable?)";
 346                 break;
 347         case -EILSEQ:
 348                 errmsg = "CRC/Timeout (could be anything)";
 349                 break;
 350         case -ETIME:
 351                 errmsg = "Device does not respond";
 352                 break;
 353         }
 354         if (packet < 0) {
 355                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 356         } else {
 357                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 358                                packet, status, errmsg);
 359         }
 360 }
 361
 362 /*
 363  * video-buf generic routine to get the next available buffer
 364  */
 365 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 366                                           struct em28xx_buffer **buf)
 367 {
 368         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 369         char *outp;
 370
 371         if (list_empty(&dma_q->active)) {
 372                 em28xx_isocdbg("No active queue to serve\n");
 373                 dev->isoc_ctl.vid_buf = NULL;
 374                 *buf = NULL;
 375                 return;
 376         }
 377
 378         /* Get the next buffer */
 379         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 380
 381         /* Cleans up buffer - Useful for testing for frame/URB loss */
 382         outp = videobuf_to_vmalloc(&(*buf)->vb);
 383         memset(outp, 0, (*buf)->vb.size);
 384
 385         dev->isoc_ctl.vid_buf = *buf;
 386
 387         return;
 388 }
 389
 390 /*
 391  * video-buf generic routine to get the next available VBI buffer
 392  */
 393 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 394                                     struct em28xx_buffer **buf)
 395 {
 396         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 397         char *outp;
 398
 399         if (list_empty(&dma_q->active)) {
 400                 em28xx_isocdbg("No active queue to serve\n");
 401                 dev->isoc_ctl.vbi_buf = NULL;
 402                 *buf = NULL;
 403                 return;
 404         }
 405
 406         /* Get the next buffer */
 407         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 408         /* Cleans up buffer - Useful for testing for frame/URB loss */
 409         outp = videobuf_to_vmalloc(&(*buf)->vb);
 410         memset(outp, 0x00, (*buf)->vb.size);
 411
 412         dev->isoc_ctl.vbi_buf = *buf;
 413
 414         return;
 415 }
 416
 417 /*
 418  * Controls the isoc copy of each urb packet
 419  */
 420 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 421 {
 422         struct em28xx_buffer    *buf;
 423         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 424         unsigned char *outp = NULL;
 425         int i, len = 0, rc = 1;
 426         unsigned char *p;
 427
 428         if (!dev)
 429                 return 0;
 430
 431         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 432                 return 0;
 433
 434         if (urb->status < 0) {
 435                 print_err_status(dev, -1, urb->status);
 436                 if (urb->status == -ENOENT)
 437                         return 0;
 438         }
 439
 440         buf = dev->isoc_ctl.vid_buf;
 441         if (buf != NULL)
 442                 outp = videobuf_to_vmalloc(&buf->vb);
 443
 444         for (i = 0; i < urb->number_of_packets; i++) {
 445                 int status = urb->iso_frame_desc[i].status;
 446
 447                 if (status < 0) {
 448                         print_err_status(dev, i, status);
 449                         if (urb->iso_frame_desc[i].status != -EPROTO)
 450                                 continue;
 451                 }
 452
 453                 len = urb->iso_frame_desc[i].actual_length - 4;
 454
 455                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 456                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 457                         continue;
 458                 }
 459                 if (urb->iso_frame_desc[i].actual_length >
 460                                                 dev->max_pkt_size) {
 461                         em28xx_isocdbg("packet bigger than packet size");
 462                         continue;
 463                 }
 464
 465                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 466
 467                 /* FIXME: incomplete buffer checks where removed to make
 468                    logic simpler. Impacts of those changes should be evaluated
 469                  */
 470                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 471                         em28xx_isocdbg("VBI HEADER!!!\n");
 472                         /* FIXME: Should add vbi copy */
 473                         continue;
 474                 }
 475                 if (p[0] == 0x22 && p[1] == 0x5a) {
 476                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 477                                        len, (p[2] & 1) ? "odd" : "even");
 478
 479                         if (dev->progressive || !(p[2] & 1)) {
 480                                 if (buf != NULL)
 481                                         buffer_filled(dev, dma_q, buf);
 482                                 get_next_buf(dma_q, &buf);
 483                                 if (buf == NULL)
 484                                         outp = NULL;
 485                                 else
 486                                         outp = videobuf_to_vmalloc(&buf->vb);
 487                         }
 488
 489                         if (buf != NULL) {
 490                                 if (p[2] & 1)
 491                                         buf->top_field = 0;
 492                                 else
 493                                         buf->top_field = 1;
 494                         }
 495
 496                         dma_q->pos = 0;
 497                 }
 498                 if (buf != NULL) {
 499                         if (p[0] != 0x88 && p[0] != 0x22) {
 500                                 em28xx_isocdbg("frame is not complete\n");
 501                                 len += 4;
 502                         } else {
 503                                 p += 4;
 504                         }
 505                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 506                 }
 507         }
 508         return rc;
 509 }
 510
 511 /* Version of isoc handler that takes into account a mixture of video and
 512    VBI data */
 513 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 514 {
 515         struct em28xx_buffer    *buf, *vbi_buf;
 516         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 517         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 518         unsigned char *outp = NULL;
 519         unsigned char *vbioutp = NULL;
 520         int i, len = 0, rc = 1;
 521         unsigned char *p;
 522         int vbi_size;
 523
 524         if (!dev)
 525                 return 0;
 526
 527         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 528                 return 0;
 529
 530         if (urb->status < 0) {
 531                 print_err_status(dev, -1, urb->status);
 532                 if (urb->status == -ENOENT)
 533                         return 0;
 534         }
 535
 536         buf = dev->isoc_ctl.vid_buf;
 537         if (buf != NULL)
 538                 outp = videobuf_to_vmalloc(&buf->vb);
 539
 540         vbi_buf = dev->isoc_ctl.vbi_buf;
 541         if (vbi_buf != NULL)
 542                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 543
 544         for (i = 0; i < urb->number_of_packets; i++) {
 545                 int status = urb->iso_frame_desc[i].status;
 546
 547                 if (status < 0) {
 548                         print_err_status(dev, i, status);
 549                         if (urb->iso_frame_desc[i].status != -EPROTO)
 550                                 continue;
 551                 }
 552
 553                 len = urb->iso_frame_desc[i].actual_length;
 554                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 555                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 556                         continue;
 557                 }
 558                 if (urb->iso_frame_desc[i].actual_length >
 559                                                 dev->max_pkt_size) {
 560                         em28xx_isocdbg("packet bigger than packet size");
 561                         continue;
 562                 }
 563
 564                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 565
 566                 /* capture type 0 = vbi start
 567                    capture type 1 = video start
 568                    capture type 2 = video in progress */
 569                 if (p[0] == 0x33 && p[1] == 0x95) {
 570                         dev->capture_type = 0;
 571                         dev->vbi_read = 0;
 572                         em28xx_isocdbg("VBI START HEADER!!!\n");
 573                         dev->cur_field = p[2];
 574                         p += 4;
 575                         len -= 4;
 576                 } else if (p[0] == 0x88 && p[1] == 0x88 &&
 577                            p[2] == 0x88 && p[3] == 0x88) {
 578                         /* continuation */
 579                         p += 4;
 580                         len -= 4;
 581                 } else if (p[0] == 0x22 && p[1] == 0x5a) {
 582                         /* start video */
 583                         p += 4;
 584                         len -= 4;
 585                 }
 586
 587                 vbi_size = dev->vbi_width * dev->vbi_height;
 588
 589                 if (dev->capture_type == 0) {
 590                         if (dev->vbi_read >= vbi_size) {
 591                                 /* We've already read all the VBI data, so
 592                                    treat the rest as video */
 593                                 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
 594                         } else if ((dev->vbi_read + len) < vbi_size) {
 595                                 /* This entire frame is VBI data */
 596                                 if (dev->vbi_read == 0 &&
 597                                     (!(dev->cur_field & 1))) {
 598                                         /* Brand new frame */
 599                                         if (vbi_buf != NULL)
 600                                                 vbi_buffer_filled(dev,
 601                                                                   vbi_dma_q,
 602                                                                   vbi_buf);
 603                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 604                                         if (vbi_buf == NULL)
 605                                                 vbioutp = NULL;
 606                                         else
 607                                                 vbioutp = videobuf_to_vmalloc(
 608                                                         &vbi_buf->vb);
 609                                 }
 610
 611                                 if (dev->vbi_read == 0) {
 612                                         vbi_dma_q->pos = 0;
 613                                         if (vbi_buf != NULL) {
 614                                                 if (dev->cur_field & 1)
 615                                                         vbi_buf->top_field = 0;
 616                                                 else
 617                                                         vbi_buf->top_field = 1;
 618                                         }
 619                                 }
 620
 621                                 dev->vbi_read += len;
 622                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 623                                                 vbioutp, len);
 624                         } else {
 625                                 /* Some of this frame is VBI data and some is
 626                                    video data */
 627                                 int vbi_data_len = vbi_size - dev->vbi_read;
 628                                 dev->vbi_read += vbi_data_len;
 629                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 630                                                 vbioutp, vbi_data_len);
 631                                 dev->capture_type = 1;
 632                                 p += vbi_data_len;
 633                                 len -= vbi_data_len;
 634                         }
 635                 }
 636
 637                 if (dev->capture_type == 1) {
 638                         dev->capture_type = 2;
 639                         if (dev->progressive || !(dev->cur_field & 1)) {
 640                                 if (buf != NULL)
 641                                         buffer_filled(dev, dma_q, buf);
 642                                 get_next_buf(dma_q, &buf);
 643                                 if (buf == NULL)
 644                                         outp = NULL;
 645                                 else
 646                                         outp = videobuf_to_vmalloc(&buf->vb);
 647                         }
 648                         if (buf != NULL) {
 649                                 if (dev->cur_field & 1)
 650                                         buf->top_field = 0;
 651                                 else
 652                                         buf->top_field = 1;
 653                         }
 654
 655                         dma_q->pos = 0;
 656                 }
 657
 658                 if (buf != NULL && dev->capture_type == 2) {
 659                         if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 &&
 660                             p[2] == 0x88 && p[3] == 0x88) {
 661                                 p += 4;
 662                                 len -= 4;
 663                         }
 664                         if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) {
 665                                 em28xx_isocdbg("Video frame %d, len=%i, %s\n",
 666                                                p[2], len, (p[2] & 1) ?
 667                                                "odd" : "even");
 668                                 p += 4;
 669                                 len -= 4;
 670                         }
 671
 672                         if (len > 0)
 673                                 em28xx_copy_video(dev, dma_q, buf, p, outp,
 674                                                   len);
 675                 }
 676         }
 677         return rc;
 678 }
 679
 680
 681 /* ------------------------------------------------------------------
 682         Videobuf operations
 683    ------------------------------------------------------------------*/
 684
 685 static int
 686 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 687 {
 688         struct em28xx_fh *fh = vq->priv_data;
 689         struct em28xx        *dev = fh->dev;
 690         struct v4l2_frequency f;
 691
 692         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
 693                 >> 3;
 694
 695         if (0 == *count)
 696                 *count = EM28XX_DEF_BUF;
 697
 698         if (*count < EM28XX_MIN_BUF)
 699                 *count = EM28XX_MIN_BUF;
 700
 701         /* Ask tuner to go to analog or radio mode */
 702         memset(&f, 0, sizeof(f));
 703         f.frequency = dev->ctl_freq;
 704         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 705
 706         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 707
 708         return 0;
 709 }
 710
 711 /* This is called *without* dev->slock held; please keep it that way */
 712 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 713 {
 714         struct em28xx_fh     *fh  = vq->priv_data;
 715         struct em28xx        *dev = fh->dev;
 716         unsigned long flags = 0;
 717         if (in_interrupt())
 718                 BUG();
 719
 720         /* We used to wait for the buffer to finish here, but this didn't work
 721            because, as we were keeping the state as VIDEOBUF_QUEUED,
 722            videobuf_queue_cancel marked it as finished for us.
 723            (Also, it could wedge forever if the hardware was misconfigured.)
 724
 725            This should be safe; by the time we get here, the buffer isn't
 726            queued anymore. If we ever start marking the buffers as
 727            VIDEOBUF_ACTIVE, it won't be, though.
 728         */
 729         spin_lock_irqsave(&dev->slock, flags);
 730         if (dev->isoc_ctl.vid_buf == buf)
 731                 dev->isoc_ctl.vid_buf = NULL;
 732         spin_unlock_irqrestore(&dev->slock, flags);
 733
 734         videobuf_vmalloc_free(&buf->vb);
 735         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 736 }
 737
 738 static int
 739 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 740                                                 enum v4l2_field field)
 741 {
 742         struct em28xx_fh     *fh  = vq->priv_data;
 743         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 744         struct em28xx        *dev = fh->dev;
 745         int                  rc = 0, urb_init = 0;
 746
 747         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
 748                         + 7) >> 3;
 749
 750         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 751                 return -EINVAL;
 752
 753         buf->vb.width  = dev->width;
 754         buf->vb.height = dev->height;
 755         buf->vb.field  = field;
 756
 757         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 758                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 759                 if (rc < 0)
 760                         goto fail;
 761         }
 762
 763         if (!dev->isoc_ctl.analog_bufs.num_bufs)
 764                 urb_init = 1;
 765
 766         if (urb_init) {
 767                 if (em28xx_vbi_supported(dev) == 1)
 768                         rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE,
 769                                               EM28XX_NUM_PACKETS,
 770                                               EM28XX_NUM_BUFS,
 771                                               dev->max_pkt_size,
 772                                               em28xx_isoc_copy_vbi);
 773                 else
 774                         rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE,
 775                                               EM28XX_NUM_PACKETS,
 776                                               EM28XX_NUM_BUFS,
 777                                               dev->max_pkt_size,
 778                                               em28xx_isoc_copy);
 779                 if (rc < 0)
 780                         goto fail;
 781         }
 782
 783         buf->vb.state = VIDEOBUF_PREPARED;
 784         return 0;
 785
 786 fail:
 787         free_buffer(vq, buf);
 788         return rc;
 789 }
 790
 791 static void
 792 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 793 {
 794         struct em28xx_buffer    *buf     = container_of(vb,
 795                                                         struct em28xx_buffer,
 796                                                         vb);
 797         struct em28xx_fh        *fh      = vq->priv_data;
 798         struct em28xx           *dev     = fh->dev;
 799         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 800
 801         buf->vb.state = VIDEOBUF_QUEUED;
 802         list_add_tail(&buf->vb.queue, &vidq->active);
 803
 804 }
 805
 806 static void buffer_release(struct videobuf_queue *vq,
 807                                 struct videobuf_buffer *vb)
 808 {
 809         struct em28xx_buffer   *buf  = container_of(vb,
 810                                                     struct em28xx_buffer,
 811                                                     vb);
 812         struct em28xx_fh       *fh   = vq->priv_data;
 813         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 814
 815         em28xx_isocdbg("em28xx: called buffer_release\n");
 816
 817         free_buffer(vq, buf);
 818 }
 819
 820 static struct videobuf_queue_ops em28xx_video_qops = {
 821         .buf_setup      = buffer_setup,
 822         .buf_prepare    = buffer_prepare,
 823         .buf_queue      = buffer_queue,
 824         .buf_release    = buffer_release,
 825 };
 826
 827 /*********************  v4l2 interface  **************************************/
 828
 829 static void video_mux(struct em28xx *dev, int index)
 830 {
 831         dev->ctl_input = index;
 832         dev->ctl_ainput = INPUT(index)->amux;
 833         dev->ctl_aoutput = INPUT(index)->aout;
 834
 835         if (!dev->ctl_aoutput)
 836                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 837
 838         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 839                         INPUT(index)->vmux, 0, 0);
 840
 841         if (dev->board.has_msp34xx) {
 842                 if (dev->i2s_speed) {
 843                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 844                                 s_i2s_clock_freq, dev->i2s_speed);
 845                 }
 846                 /* Note: this is msp3400 specific */
 847                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 848                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 849         }
 850
 851         if (dev->board.adecoder != EM28XX_NOADECODER) {
 852                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 853                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 854         }
 855
 856         em28xx_audio_analog_set(dev);
 857 }
 858
 859 /* Usage lock check functions */
 860 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 861 {
 862         struct em28xx    *dev = fh->dev;
 863
 864         if (fh->resources & bit)
 865                 /* have it already allocated */
 866                 return 1;
 867
 868         /* is it free? */
 869         if (dev->resources & bit) {
 870                 /* no, someone else uses it */
 871                 return 0;
 872         }
 873         /* it's free, grab it */
 874         fh->resources  |= bit;
 875         dev->resources |= bit;
 876         em28xx_videodbg("res: get %d\n", bit);
 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         fh->resources  &= ~bits;
 897         dev->resources &= ~bits;
 898         em28xx_videodbg("res: put %d\n", bits);
 899 }
 900
 901 static int get_ressource(struct em28xx_fh *fh)
 902 {
 903         switch (fh->type) {
 904         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 905                 return EM28XX_RESOURCE_VIDEO;
 906         case V4L2_BUF_TYPE_VBI_CAPTURE:
 907                 return EM28XX_RESOURCE_VBI;
 908         default:
 909                 BUG();
 910                 return 0;
 911         }
 912 }
 913
 914 /*
 915  * ac97_queryctrl()
 916  * return the ac97 supported controls
 917  */
 918 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 919 {
 920         int i;
 921
 922         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 923                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 924                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 925                         return 0;
 926                 }
 927         }
 928
 929         /* Control is not ac97 related */
 930         return 1;
 931 }
 932
 933 /*
 934  * ac97_get_ctrl()
 935  * return the current values for ac97 mute and volume
 936  */
 937 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 938 {
 939         switch (ctrl->id) {
 940         case V4L2_CID_AUDIO_MUTE:
 941                 ctrl->value = dev->mute;
 942                 return 0;
 943         case V4L2_CID_AUDIO_VOLUME:
 944                 ctrl->value = dev->volume;
 945                 return 0;
 946         default:
 947                 /* Control is not ac97 related */
 948                 return 1;
 949         }
 950 }
 951
 952 /*
 953  * ac97_set_ctrl()
 954  * set values for ac97 mute and volume
 955  */
 956 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 957 {
 958         int i;
 959
 960         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 961                 if (ctrl->id == ac97_qctrl[i].id)
 962                         goto handle;
 963
 964         /* Announce that hasn't handle it */
 965         return 1;
 966
 967 handle:
 968         if (ctrl->value < ac97_qctrl[i].minimum ||
 969             ctrl->value > ac97_qctrl[i].maximum)
 970                 return -ERANGE;
 971
 972         switch (ctrl->id) {
 973         case V4L2_CID_AUDIO_MUTE:
 974                 dev->mute = ctrl->value;
 975                 break;
 976         case V4L2_CID_AUDIO_VOLUME:
 977                 dev->volume = ctrl->value;
 978                 break;
 979         }
 980
 981         return em28xx_audio_analog_set(dev);
 982 }
 983
 984 static int check_dev(struct em28xx *dev)
 985 {
 986         if (dev->state & DEV_DISCONNECTED) {
 987                 em28xx_errdev("v4l2 ioctl: device not present\n");
 988                 return -ENODEV;
 989         }
 990
 991         if (dev->state & DEV_MISCONFIGURED) {
 992                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 993                               "close and open it again\n");
 994                 return -EIO;
 995         }
 996         return 0;
 997 }
 998
 999 static void get_scale(struct em28xx *dev,
1000                         unsigned int width, unsigned int height,
1001                         unsigned int *hscale, unsigned int *vscale)
1002 {
1003         unsigned int          maxw = norm_maxw(dev);
1004         unsigned int          maxh = norm_maxh(dev);
1005
1006         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1007         if (*hscale >= 0x4000)
1008                 *hscale = 0x3fff;
1009
1010         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1011         if (*vscale >= 0x4000)
1012                 *vscale = 0x3fff;
1013 }
1014
1015 /* ------------------------------------------------------------------
1016         IOCTL vidioc handling
1017    ------------------------------------------------------------------*/
1018
1019 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1020                                         struct v4l2_format *f)
1021 {
1022         struct em28xx_fh      *fh  = priv;
1023         struct em28xx         *dev = fh->dev;
1024
1025         f->fmt.pix.width = dev->width;
1026         f->fmt.pix.height = dev->height;
1027         f->fmt.pix.pixelformat = dev->format->fourcc;
1028         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1029         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1030         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1031
1032         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1033         if (dev->progressive)
1034                 f->fmt.pix.field = V4L2_FIELD_NONE;
1035         else
1036                 f->fmt.pix.field = dev->interlaced ?
1037                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1038         return 0;
1039 }
1040
1041 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1042 {
1043         unsigned int i;
1044
1045         for (i = 0; i < ARRAY_SIZE(format); i++)
1046                 if (format[i].fourcc == fourcc)
1047                         return &format[i];
1048
1049         return NULL;
1050 }
1051
1052 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1053                         struct v4l2_format *f)
1054 {
1055         struct em28xx_fh      *fh    = priv;
1056         struct em28xx         *dev   = fh->dev;
1057         unsigned int          width  = f->fmt.pix.width;
1058         unsigned int          height = f->fmt.pix.height;
1059         unsigned int          maxw   = norm_maxw(dev);
1060         unsigned int          maxh   = norm_maxh(dev);
1061         unsigned int          hscale, vscale;
1062         struct em28xx_fmt     *fmt;
1063
1064         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1065         if (!fmt) {
1066                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1067                                 f->fmt.pix.pixelformat);
1068                 return -EINVAL;
1069         }
1070
1071         if (dev->board.is_em2800) {
1072                 /* the em2800 can only scale down to 50% */
1073                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1074                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1075                 /* MaxPacketSize for em2800 is too small to capture at full resolution
1076                  * use half of maxw as the scaler can only scale to 50% */
1077                 if (width == maxw && height == maxh)
1078                         width /= 2;
1079         } else {
1080                 /* width must even because of the YUYV format
1081                    height must be even because of interlacing */
1082                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1083                                       1, 0);
1084         }
1085
1086         get_scale(dev, width, height, &hscale, &vscale);
1087
1088         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1089         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1090
1091         f->fmt.pix.width = width;
1092         f->fmt.pix.height = height;
1093         f->fmt.pix.pixelformat = fmt->fourcc;
1094         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1095         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1096         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1097         if (dev->progressive)
1098                 f->fmt.pix.field = V4L2_FIELD_NONE;
1099         else
1100                 f->fmt.pix.field = dev->interlaced ?
1101                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1102
1103         return 0;
1104 }
1105
1106 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1107                                    unsigned width, unsigned height)
1108 {
1109         struct em28xx_fmt     *fmt;
1110
1111         fmt = format_by_fourcc(fourcc);
1112         if (!fmt)
1113                 return -EINVAL;
1114
1115         dev->format = fmt;
1116         dev->width  = width;
1117         dev->height = height;
1118
1119         /* set new image size */
1120         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1121
1122         em28xx_set_alternate(dev);
1123         em28xx_resolution_set(dev);
1124
1125         return 0;
1126 }
1127
1128 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1129                         struct v4l2_format *f)
1130 {
1131         struct em28xx_fh      *fh  = priv;
1132         struct em28xx         *dev = fh->dev;
1133         int                   rc;
1134
1135         rc = check_dev(dev);
1136         if (rc < 0)
1137                 return rc;
1138
1139         vidioc_try_fmt_vid_cap(file, priv, f);
1140
1141         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1142                 em28xx_errdev("%s queue busy\n", __func__);
1143                 return -EBUSY;
1144         }
1145
1146         return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1147                                 f->fmt.pix.width, f->fmt.pix.height);
1148 }
1149
1150 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1151 {
1152         struct em28xx_fh   *fh  = priv;
1153         struct em28xx      *dev = fh->dev;
1154         int                rc;
1155
1156         rc = check_dev(dev);
1157         if (rc < 0)
1158                 return rc;
1159
1160         *norm = dev->norm;
1161
1162         return 0;
1163 }
1164
1165 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1166 {
1167         struct em28xx_fh   *fh  = priv;
1168         struct em28xx      *dev = fh->dev;
1169         int                rc;
1170
1171         rc = check_dev(dev);
1172         if (rc < 0)
1173                 return rc;
1174
1175         v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
1176
1177         return 0;
1178 }
1179
1180 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1181 {
1182         struct em28xx_fh   *fh  = priv;
1183         struct em28xx      *dev = fh->dev;
1184         struct v4l2_format f;
1185         int                rc;
1186
1187         rc = check_dev(dev);
1188         if (rc < 0)
1189                 return rc;
1190
1191         dev->norm = *norm;
1192
1193         /* Adjusts width/height, if needed */
1194         f.fmt.pix.width = dev->width;
1195         f.fmt.pix.height = dev->height;
1196         vidioc_try_fmt_vid_cap(file, priv, &f);
1197
1198         /* set new image size */
1199         dev->width = f.fmt.pix.width;
1200         dev->height = f.fmt.pix.height;
1201         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1202
1203         em28xx_resolution_set(dev);
1204         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1205
1206         return 0;
1207 }
1208
1209 static int vidioc_g_parm(struct file *file, void *priv,
1210                          struct v4l2_streamparm *p)
1211 {
1212         struct em28xx_fh   *fh  = priv;
1213         struct em28xx      *dev = fh->dev;
1214         int rc = 0;
1215
1216         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1217                 return -EINVAL;
1218
1219         if (dev->board.is_webcam)
1220                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1221                                                 video, g_parm, p);
1222         else
1223                 v4l2_video_std_frame_period(dev->norm,
1224                                                  &p->parm.capture.timeperframe);
1225
1226         return rc;
1227 }
1228
1229 static int vidioc_s_parm(struct file *file, void *priv,
1230                          struct v4l2_streamparm *p)
1231 {
1232         struct em28xx_fh   *fh  = priv;
1233         struct em28xx      *dev = fh->dev;
1234
1235         if (!dev->board.is_webcam)
1236                 return -EINVAL;
1237
1238         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1239                 return -EINVAL;
1240
1241         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1242 }
1243
1244 static const char *iname[] = {
1245         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1246         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1247         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1248         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1249         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1250         [EM28XX_VMUX_TELEVISION] = "Television",
1251         [EM28XX_VMUX_CABLE]      = "Cable TV",
1252         [EM28XX_VMUX_DVB]        = "DVB",
1253         [EM28XX_VMUX_DEBUG]      = "for debug only",
1254 };
1255
1256 static int vidioc_enum_input(struct file *file, void *priv,
1257                                 struct v4l2_input *i)
1258 {
1259         struct em28xx_fh   *fh  = priv;
1260         struct em28xx      *dev = fh->dev;
1261         unsigned int       n;
1262
1263         n = i->index;
1264         if (n >= MAX_EM28XX_INPUT)
1265                 return -EINVAL;
1266         if (0 == INPUT(n)->type)
1267                 return -EINVAL;
1268
1269         i->index = n;
1270         i->type = V4L2_INPUT_TYPE_CAMERA;
1271
1272         strcpy(i->name, iname[INPUT(n)->type]);
1273
1274         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1275                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1276                 i->type = V4L2_INPUT_TYPE_TUNER;
1277
1278         i->std = dev->vdev->tvnorms;
1279
1280         return 0;
1281 }
1282
1283 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1284 {
1285         struct em28xx_fh   *fh  = priv;
1286         struct em28xx      *dev = fh->dev;
1287
1288         *i = dev->ctl_input;
1289
1290         return 0;
1291 }
1292
1293 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1294 {
1295         struct em28xx_fh   *fh  = priv;
1296         struct em28xx      *dev = fh->dev;
1297         int                rc;
1298
1299         rc = check_dev(dev);
1300         if (rc < 0)
1301                 return rc;
1302
1303         if (i >= MAX_EM28XX_INPUT)
1304                 return -EINVAL;
1305         if (0 == INPUT(i)->type)
1306                 return -EINVAL;
1307
1308         video_mux(dev, i);
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         dev->ctl_ainput = INPUT(a->index)->amux;
1370         dev->ctl_aoutput = INPUT(a->index)->aout;
1371
1372         if (!dev->ctl_aoutput)
1373                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1374
1375         return 0;
1376 }
1377
1378 static int vidioc_queryctrl(struct file *file, void *priv,
1379                                 struct v4l2_queryctrl *qc)
1380 {
1381         struct em28xx_fh      *fh  = priv;
1382         struct em28xx         *dev = fh->dev;
1383         int                   id  = qc->id;
1384         int                   rc;
1385
1386         rc = check_dev(dev);
1387         if (rc < 0)
1388                 return rc;
1389
1390         memset(qc, 0, sizeof(*qc));
1391
1392         qc->id = id;
1393
1394         /* enumerate AC97 controls */
1395         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1396                 rc = ac97_queryctrl(qc);
1397                 if (!rc)
1398                         return 0;
1399         }
1400
1401         /* enumerate V4L2 device controls */
1402         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1403
1404         if (qc->type)
1405                 return 0;
1406         else
1407                 return -EINVAL;
1408 }
1409
1410 /*
1411  * FIXME: This is an indirect way to check if a control exists at a
1412  * subdev. Instead of that hack, maybe the better would be to change all
1413  * subdevs to return -ENOIOCTLCMD, if an ioctl is not supported.
1414  */
1415 static int check_subdev_ctrl(struct em28xx *dev, int id)
1416 {
1417         struct v4l2_queryctrl qc;
1418
1419         memset(&qc, 0, sizeof(qc));
1420         qc.id = id;
1421
1422         /* enumerate V4L2 device controls */
1423         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc);
1424
1425         if (qc.type)
1426                 return 0;
1427         else
1428                 return -EINVAL;
1429 }
1430
1431 static int vidioc_g_ctrl(struct file *file, void *priv,
1432                                 struct v4l2_control *ctrl)
1433 {
1434         struct em28xx_fh      *fh  = priv;
1435         struct em28xx         *dev = fh->dev;
1436         int                   rc;
1437
1438         rc = check_dev(dev);
1439         if (rc < 0)
1440                 return rc;
1441         rc = 0;
1442
1443         /* Set an AC97 control */
1444         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1445                 rc = ac97_get_ctrl(dev, ctrl);
1446         else
1447                 rc = 1;
1448
1449         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1450         if (rc == 1) {
1451                 if (check_subdev_ctrl(dev, ctrl->id))
1452                         return -EINVAL;
1453
1454                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1455                 rc = 0;
1456         }
1457
1458         return rc;
1459 }
1460
1461 static int vidioc_s_ctrl(struct file *file, void *priv,
1462                                 struct v4l2_control *ctrl)
1463 {
1464         struct em28xx_fh      *fh  = priv;
1465         struct em28xx         *dev = fh->dev;
1466         int                   rc;
1467
1468         rc = check_dev(dev);
1469         if (rc < 0)
1470                 return rc;
1471
1472         /* Set an AC97 control */
1473         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1474                 rc = ac97_set_ctrl(dev, ctrl);
1475         else
1476                 rc = 1;
1477
1478         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1479         if (rc == 1) {
1480                 rc = check_subdev_ctrl(dev, ctrl->id);
1481                 if (!rc)
1482                         v4l2_device_call_all(&dev->v4l2_dev, 0,
1483                                              core, s_ctrl, ctrl);
1484                 /*
1485                  * In the case of non-AC97 volume controls, we still need
1486                  * to do some setups at em28xx, in order to mute/unmute
1487                  * and to adjust audio volume. However, the value ranges
1488                  * should be checked by the corresponding V4L subdriver.
1489                  */
1490                 switch (ctrl->id) {
1491                 case V4L2_CID_AUDIO_MUTE:
1492                         dev->mute = ctrl->value;
1493                         rc = em28xx_audio_analog_set(dev);
1494                         break;
1495                 case V4L2_CID_AUDIO_VOLUME:
1496                         dev->volume = ctrl->value;
1497                         rc = em28xx_audio_analog_set(dev);
1498                 }
1499         }
1500         return (rc < 0) ? rc : 0;
1501 }
1502
1503 static int vidioc_g_tuner(struct file *file, void *priv,
1504                                 struct v4l2_tuner *t)
1505 {
1506         struct em28xx_fh      *fh  = priv;
1507         struct em28xx         *dev = fh->dev;
1508         int                   rc;
1509
1510         rc = check_dev(dev);
1511         if (rc < 0)
1512                 return rc;
1513
1514         if (0 != t->index)
1515                 return -EINVAL;
1516
1517         strcpy(t->name, "Tuner");
1518         t->type = V4L2_TUNER_ANALOG_TV;
1519
1520         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1521         return 0;
1522 }
1523
1524 static int vidioc_s_tuner(struct file *file, void *priv,
1525                                 struct v4l2_tuner *t)
1526 {
1527         struct em28xx_fh      *fh  = priv;
1528         struct em28xx         *dev = fh->dev;
1529         int                   rc;
1530
1531         rc = check_dev(dev);
1532         if (rc < 0)
1533                 return rc;
1534
1535         if (0 != t->index)
1536                 return -EINVAL;
1537
1538         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1539         return 0;
1540 }
1541
1542 static int vidioc_g_frequency(struct file *file, void *priv,
1543                                 struct v4l2_frequency *f)
1544 {
1545         struct em28xx_fh      *fh  = priv;
1546         struct em28xx         *dev = fh->dev;
1547
1548         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1549         f->frequency = dev->ctl_freq;
1550         return 0;
1551 }
1552
1553 static int vidioc_s_frequency(struct file *file, void *priv,
1554                                 struct v4l2_frequency *f)
1555 {
1556         struct em28xx_fh      *fh  = priv;
1557         struct em28xx         *dev = fh->dev;
1558         int                   rc;
1559
1560         rc = check_dev(dev);
1561         if (rc < 0)
1562                 return rc;
1563
1564         if (0 != f->tuner)
1565                 return -EINVAL;
1566
1567         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1568                 return -EINVAL;
1569         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1570                 return -EINVAL;
1571
1572         dev->ctl_freq = f->frequency;
1573         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1574
1575         return 0;
1576 }
1577
1578 #ifdef CONFIG_VIDEO_ADV_DEBUG
1579 static int em28xx_reg_len(int reg)
1580 {
1581         switch (reg) {
1582         case EM28XX_R40_AC97LSB:
1583         case EM28XX_R30_HSCALELOW:
1584         case EM28XX_R32_VSCALELOW:
1585                 return 2;
1586         default:
1587                 return 1;
1588         }
1589 }
1590
1591 static int vidioc_g_chip_ident(struct file *file, void *priv,
1592                struct v4l2_dbg_chip_ident *chip)
1593 {
1594         struct em28xx_fh      *fh  = priv;
1595         struct em28xx         *dev = fh->dev;
1596
1597         chip->ident = V4L2_IDENT_NONE;
1598         chip->revision = 0;
1599
1600         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1601
1602         return 0;
1603 }
1604
1605
1606 static int vidioc_g_register(struct file *file, void *priv,
1607                              struct v4l2_dbg_register *reg)
1608 {
1609         struct em28xx_fh      *fh  = priv;
1610         struct em28xx         *dev = fh->dev;
1611         int ret;
1612
1613         switch (reg->match.type) {
1614         case V4L2_CHIP_MATCH_AC97:
1615                 ret = em28xx_read_ac97(dev, reg->reg);
1616                 if (ret < 0)
1617                         return ret;
1618
1619                 reg->val = ret;
1620                 reg->size = 1;
1621                 return 0;
1622         case V4L2_CHIP_MATCH_I2C_DRIVER:
1623                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1624                 return 0;
1625         case V4L2_CHIP_MATCH_I2C_ADDR:
1626                 /* TODO: is this correct? */
1627                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1628                 return 0;
1629         default:
1630                 if (!v4l2_chip_match_host(&reg->match))
1631                         return -EINVAL;
1632         }
1633
1634         /* Match host */
1635         reg->size = em28xx_reg_len(reg->reg);
1636         if (reg->size == 1) {
1637                 ret = em28xx_read_reg(dev, reg->reg);
1638
1639                 if (ret < 0)
1640                         return ret;
1641
1642                 reg->val = ret;
1643         } else {
1644                 __le16 val = 0;
1645                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1646                                                    reg->reg, (char *)&val, 2);
1647                 if (ret < 0)
1648                         return ret;
1649
1650                 reg->val = le16_to_cpu(val);
1651         }
1652
1653         return 0;
1654 }
1655
1656 static int vidioc_s_register(struct file *file, void *priv,
1657                              struct v4l2_dbg_register *reg)
1658 {
1659         struct em28xx_fh      *fh  = priv;
1660         struct em28xx         *dev = fh->dev;
1661         __le16 buf;
1662
1663         switch (reg->match.type) {
1664         case V4L2_CHIP_MATCH_AC97:
1665                 return em28xx_write_ac97(dev, reg->reg, reg->val);
1666         case V4L2_CHIP_MATCH_I2C_DRIVER:
1667                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1668                 return 0;
1669         case V4L2_CHIP_MATCH_I2C_ADDR:
1670                 /* TODO: is this correct? */
1671                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1672                 return 0;
1673         default:
1674                 if (!v4l2_chip_match_host(&reg->match))
1675                         return -EINVAL;
1676         }
1677
1678         /* Match host */
1679         buf = cpu_to_le16(reg->val);
1680
1681         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1682                                em28xx_reg_len(reg->reg));
1683 }
1684 #endif
1685
1686
1687 static int vidioc_cropcap(struct file *file, void *priv,
1688                                         struct v4l2_cropcap *cc)
1689 {
1690         struct em28xx_fh      *fh  = priv;
1691         struct em28xx         *dev = fh->dev;
1692
1693         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1694                 return -EINVAL;
1695
1696         cc->bounds.left = 0;
1697         cc->bounds.top = 0;
1698         cc->bounds.width = dev->width;
1699         cc->bounds.height = dev->height;
1700         cc->defrect = cc->bounds;
1701         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1702         cc->pixelaspect.denominator = 59;
1703
1704         return 0;
1705 }
1706
1707 static int vidioc_streamon(struct file *file, void *priv,
1708                                         enum v4l2_buf_type type)
1709 {
1710         struct em28xx_fh      *fh  = priv;
1711         struct em28xx         *dev = fh->dev;
1712         int                   rc = -EINVAL;
1713
1714         rc = check_dev(dev);
1715         if (rc < 0)
1716                 return rc;
1717
1718         if (unlikely(type != fh->type))
1719                 return -EINVAL;
1720
1721         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1722                         fh, type, fh->resources, dev->resources);
1723
1724         if (unlikely(!res_get(fh, get_ressource(fh))))
1725                 return -EBUSY;
1726
1727         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1728                 rc = videobuf_streamon(&fh->vb_vidq);
1729         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1730                 rc = videobuf_streamon(&fh->vb_vbiq);
1731
1732         return rc;
1733 }
1734
1735 static int vidioc_streamoff(struct file *file, void *priv,
1736                                         enum v4l2_buf_type type)
1737 {
1738         struct em28xx_fh      *fh  = priv;
1739         struct em28xx         *dev = fh->dev;
1740         int                   rc;
1741
1742         rc = check_dev(dev);
1743         if (rc < 0)
1744                 return rc;
1745
1746         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1747             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1748                 return -EINVAL;
1749         if (type != fh->type)
1750                 return -EINVAL;
1751
1752         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1753                         fh, type, fh->resources, dev->resources);
1754
1755         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1756                 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
1757                         videobuf_streamoff(&fh->vb_vidq);
1758                         res_free(fh, EM28XX_RESOURCE_VIDEO);
1759                 }
1760         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1761                 if (res_check(fh, EM28XX_RESOURCE_VBI)) {
1762                         videobuf_streamoff(&fh->vb_vbiq);
1763                         res_free(fh, EM28XX_RESOURCE_VBI);
1764                 }
1765         }
1766
1767         return 0;
1768 }
1769
1770 static int vidioc_querycap(struct file *file, void  *priv,
1771                                         struct v4l2_capability *cap)
1772 {
1773         struct em28xx_fh      *fh  = priv;
1774         struct em28xx         *dev = fh->dev;
1775
1776         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1777         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1778         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1779
1780         cap->capabilities =
1781                         V4L2_CAP_SLICED_VBI_CAPTURE |
1782                         V4L2_CAP_VIDEO_CAPTURE |
1783                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1784
1785         if (dev->vbi_dev)
1786                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1787
1788         if (dev->audio_mode.has_audio)
1789                 cap->capabilities |= V4L2_CAP_AUDIO;
1790
1791         if (dev->tuner_type != TUNER_ABSENT)
1792                 cap->capabilities |= V4L2_CAP_TUNER;
1793
1794         return 0;
1795 }
1796
1797 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1798                                         struct v4l2_fmtdesc *f)
1799 {
1800         if (unlikely(f->index >= ARRAY_SIZE(format)))
1801                 return -EINVAL;
1802
1803         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1804         f->pixelformat = format[f->index].fourcc;
1805
1806         return 0;
1807 }
1808
1809 static int vidioc_enum_framesizes(struct file *file, void *priv,
1810                                   struct v4l2_frmsizeenum *fsize)
1811 {
1812         struct em28xx_fh      *fh  = priv;
1813         struct em28xx         *dev = fh->dev;
1814         struct em28xx_fmt     *fmt;
1815         unsigned int          maxw = norm_maxw(dev);
1816         unsigned int          maxh = norm_maxh(dev);
1817
1818         fmt = format_by_fourcc(fsize->pixel_format);
1819         if (!fmt) {
1820                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1821                                 fsize->pixel_format);
1822                 return -EINVAL;
1823         }
1824
1825         if (dev->board.is_em2800) {
1826                 if (fsize->index > 1)
1827                         return -EINVAL;
1828                 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1829                 fsize->discrete.width = maxw / (1 + fsize->index);
1830                 fsize->discrete.height = maxh / (1 + fsize->index);
1831                 return 0;
1832         }
1833
1834         if (fsize->index != 0)
1835                 return -EINVAL;
1836
1837         /* Report a continuous range */
1838         fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1839         fsize->stepwise.min_width = 48;
1840         fsize->stepwise.min_height = 32;
1841         fsize->stepwise.max_width = maxw;
1842         fsize->stepwise.max_height = maxh;
1843         fsize->stepwise.step_width = 1;
1844         fsize->stepwise.step_height = 1;
1845         return 0;
1846 }
1847
1848 /* Sliced VBI ioctls */
1849 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1850                                         struct v4l2_format *f)
1851 {
1852         struct em28xx_fh      *fh  = priv;
1853         struct em28xx         *dev = fh->dev;
1854         int                   rc;
1855
1856         rc = check_dev(dev);
1857         if (rc < 0)
1858                 return rc;
1859
1860         f->fmt.sliced.service_set = 0;
1861         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1862
1863         if (f->fmt.sliced.service_set == 0)
1864                 rc = -EINVAL;
1865
1866         return rc;
1867 }
1868
1869 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1870                         struct v4l2_format *f)
1871 {
1872         struct em28xx_fh      *fh  = priv;
1873         struct em28xx         *dev = fh->dev;
1874         int                   rc;
1875
1876         rc = check_dev(dev);
1877         if (rc < 0)
1878                 return rc;
1879
1880         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1881
1882         if (f->fmt.sliced.service_set == 0)
1883                 return -EINVAL;
1884
1885         return 0;
1886 }
1887
1888 /* RAW VBI ioctls */
1889
1890 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1891                                 struct v4l2_format *format)
1892 {
1893         struct em28xx_fh      *fh  = priv;
1894         struct em28xx         *dev = fh->dev;
1895
1896         format->fmt.vbi.samples_per_line = dev->vbi_width;
1897         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1898         format->fmt.vbi.offset = 0;
1899         format->fmt.vbi.flags = 0;
1900         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1901         format->fmt.vbi.count[0] = dev->vbi_height;
1902         format->fmt.vbi.count[1] = dev->vbi_height;
1903
1904         /* Varies by video standard (NTSC, PAL, etc.) */
1905         if (dev->norm & V4L2_STD_525_60) {
1906                 /* NTSC */
1907                 format->fmt.vbi.start[0] = 10;
1908                 format->fmt.vbi.start[1] = 273;
1909         } else if (dev->norm & V4L2_STD_625_50) {
1910                 /* PAL */
1911                 format->fmt.vbi.start[0] = 6;
1912                 format->fmt.vbi.start[1] = 318;
1913         }
1914
1915         return 0;
1916 }
1917
1918 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1919                                 struct v4l2_format *format)
1920 {
1921         struct em28xx_fh      *fh  = priv;
1922         struct em28xx         *dev = fh->dev;
1923
1924         format->fmt.vbi.samples_per_line = dev->vbi_width;
1925         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1926         format->fmt.vbi.offset = 0;
1927         format->fmt.vbi.flags = 0;
1928         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1929         format->fmt.vbi.count[0] = dev->vbi_height;
1930         format->fmt.vbi.count[1] = dev->vbi_height;
1931
1932         /* Varies by video standard (NTSC, PAL, etc.) */
1933         if (dev->norm & V4L2_STD_525_60) {
1934                 /* NTSC */
1935                 format->fmt.vbi.start[0] = 10;
1936                 format->fmt.vbi.start[1] = 273;
1937         } else if (dev->norm & V4L2_STD_625_50) {
1938                 /* PAL */
1939                 format->fmt.vbi.start[0] = 6;
1940                 format->fmt.vbi.start[1] = 318;
1941         }
1942
1943         return 0;
1944 }
1945
1946 static int vidioc_reqbufs(struct file *file, void *priv,
1947                           struct v4l2_requestbuffers *rb)
1948 {
1949         struct em28xx_fh      *fh  = priv;
1950         struct em28xx         *dev = fh->dev;
1951         int                   rc;
1952
1953         rc = check_dev(dev);
1954         if (rc < 0)
1955                 return rc;
1956
1957         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1958                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1959         else
1960                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1961 }
1962
1963 static int vidioc_querybuf(struct file *file, void *priv,
1964                            struct v4l2_buffer *b)
1965 {
1966         struct em28xx_fh      *fh  = priv;
1967         struct em28xx         *dev = fh->dev;
1968         int                   rc;
1969
1970         rc = check_dev(dev);
1971         if (rc < 0)
1972                 return rc;
1973
1974         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1975                 return videobuf_querybuf(&fh->vb_vidq, b);
1976         else {
1977                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1978                    the videobuf framework, but we probably shouldn't be
1979                    returning a buffer larger than that which was asked for.
1980                    At a minimum, it causes a crash in zvbi since it does
1981                    a memcpy based on the source buffer length */
1982                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1983                 b->length = dev->vbi_width * dev->vbi_height * 2;
1984
1985                 return result;
1986         }
1987 }
1988
1989 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1990 {
1991         struct em28xx_fh      *fh  = priv;
1992         struct em28xx         *dev = fh->dev;
1993         int                   rc;
1994
1995         rc = check_dev(dev);
1996         if (rc < 0)
1997                 return rc;
1998
1999         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2000                 return videobuf_qbuf(&fh->vb_vidq, b);
2001         else
2002                 return videobuf_qbuf(&fh->vb_vbiq, b);
2003 }
2004
2005 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
2006 {
2007         struct em28xx_fh      *fh  = priv;
2008         struct em28xx         *dev = fh->dev;
2009         int                   rc;
2010
2011         rc = check_dev(dev);
2012         if (rc < 0)
2013                 return rc;
2014
2015         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2016                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
2017                                       O_NONBLOCK);
2018         else
2019                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
2020                                       O_NONBLOCK);
2021 }
2022
2023 /* ----------------------------------------------------------- */
2024 /* RADIO ESPECIFIC IOCTLS                                      */
2025 /* ----------------------------------------------------------- */
2026
2027 static int radio_querycap(struct file *file, void  *priv,
2028                           struct v4l2_capability *cap)
2029 {
2030         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2031
2032         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
2033         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
2034         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
2035
2036         cap->capabilities = V4L2_CAP_TUNER;
2037         return 0;
2038 }
2039
2040 static int radio_g_tuner(struct file *file, void *priv,
2041                          struct v4l2_tuner *t)
2042 {
2043         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2044
2045         if (unlikely(t->index > 0))
2046                 return -EINVAL;
2047
2048         strcpy(t->name, "Radio");
2049         t->type = V4L2_TUNER_RADIO;
2050
2051         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2052
2053         return 0;
2054 }
2055
2056 static int radio_enum_input(struct file *file, void *priv,
2057                             struct v4l2_input *i)
2058 {
2059         if (i->index != 0)
2060                 return -EINVAL;
2061         strcpy(i->name, "Radio");
2062         i->type = V4L2_INPUT_TYPE_TUNER;
2063
2064         return 0;
2065 }
2066
2067 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2068 {
2069         if (unlikely(a->index))
2070                 return -EINVAL;
2071
2072         strcpy(a->name, "Radio");
2073         return 0;
2074 }
2075
2076 static int radio_s_tuner(struct file *file, void *priv,
2077                          struct v4l2_tuner *t)
2078 {
2079         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2080
2081         if (0 != t->index)
2082                 return -EINVAL;
2083
2084         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2085
2086         return 0;
2087 }
2088
2089 static int radio_s_audio(struct file *file, void *fh,
2090                          struct v4l2_audio *a)
2091 {
2092         return 0;
2093 }
2094
2095 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2096 {
2097         return 0;
2098 }
2099
2100 static int radio_queryctrl(struct file *file, void *priv,
2101                            struct v4l2_queryctrl *qc)
2102 {
2103         int i;
2104
2105         if (qc->id <  V4L2_CID_BASE ||
2106                 qc->id >= V4L2_CID_LASTP1)
2107                 return -EINVAL;
2108
2109         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2110                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2111                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2112                         return 0;
2113                 }
2114         }
2115
2116         return -EINVAL;
2117 }
2118
2119 /*
2120  * em28xx_v4l2_open()
2121  * inits the device and starts isoc transfer
2122  */
2123 static int em28xx_v4l2_open(struct file *filp)
2124 {
2125         int errCode = 0, radio = 0;
2126         struct video_device *vdev = video_devdata(filp);
2127         struct em28xx *dev = video_drvdata(filp);
2128         enum v4l2_buf_type fh_type = 0;
2129         struct em28xx_fh *fh;
2130         enum v4l2_field field;
2131
2132         switch (vdev->vfl_type) {
2133         case VFL_TYPE_GRABBER:
2134                 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2135                 break;
2136         case VFL_TYPE_VBI:
2137                 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2138                 break;
2139         case VFL_TYPE_RADIO:
2140                 radio = 1;
2141                 break;
2142         }
2143
2144         em28xx_videodbg("open dev=%s type=%s users=%d\n",
2145                         video_device_node_name(vdev), v4l2_type_names[fh_type],
2146                         dev->users);
2147
2148
2149         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2150         if (!fh) {
2151                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
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, &dev->lock);
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, &dev->lock);
2192
2193         return errCode;
2194 }
2195
2196 /*
2197  * em28xx_realease_resources()
2198  * unregisters the v4l2,i2c and usb devices
2199  * called when the device gets disconected or at module unload
2200 */
2201 void em28xx_release_analog_resources(struct em28xx *dev)
2202 {
2203
2204         /*FIXME: I2C IR should be disconnected */
2205
2206         if (dev->radio_dev) {
2207                 if (video_is_registered(dev->radio_dev))
2208                         video_unregister_device(dev->radio_dev);
2209                 else
2210                         video_device_release(dev->radio_dev);
2211                 dev->radio_dev = NULL;
2212         }
2213         if (dev->vbi_dev) {
2214                 em28xx_info("V4L2 device %s deregistered\n",
2215                             video_device_node_name(dev->vbi_dev));
2216                 if (video_is_registered(dev->vbi_dev))
2217                         video_unregister_device(dev->vbi_dev);
2218                 else
2219                         video_device_release(dev->vbi_dev);
2220                 dev->vbi_dev = NULL;
2221         }
2222         if (dev->vdev) {
2223                 em28xx_info("V4L2 device %s deregistered\n",
2224                             video_device_node_name(dev->vdev));
2225                 if (video_is_registered(dev->vdev))
2226                         video_unregister_device(dev->vdev);
2227                 else
2228                         video_device_release(dev->vdev);
2229                 dev->vdev = NULL;
2230         }
2231 }
2232
2233 /*
2234  * em28xx_v4l2_close()
2235  * stops streaming and deallocates all resources allocated by the v4l2
2236  * calls and ioctls
2237  */
2238 static int em28xx_v4l2_close(struct file *filp)
2239 {
2240         struct em28xx_fh *fh  = filp->private_data;
2241         struct em28xx    *dev = fh->dev;
2242         int              errCode;
2243
2244         em28xx_videodbg("users=%d\n", dev->users);
2245
2246         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2247                 videobuf_stop(&fh->vb_vidq);
2248                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2249         }
2250
2251         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2252                 videobuf_stop(&fh->vb_vbiq);
2253                 res_free(fh, EM28XX_RESOURCE_VBI);
2254         }
2255
2256         if (dev->users == 1) {
2257                 /* the device is already disconnect,
2258                    free the remaining resources */
2259                 if (dev->state & DEV_DISCONNECTED) {
2260                         em28xx_release_resources(dev);
2261                         kfree(dev->alt_max_pkt_size);
2262                         kfree(dev);
2263                         kfree(fh);
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, EM28XX_ANALOG_MODE);
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         return 0;
2289 }
2290
2291 /*
2292  * em28xx_v4l2_read()
2293  * will allocate buffers when called for the first time
2294  */
2295 static ssize_t
2296 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2297                  loff_t *pos)
2298 {
2299         struct em28xx_fh *fh = filp->private_data;
2300         struct em28xx *dev = fh->dev;
2301         int rc;
2302
2303         rc = check_dev(dev);
2304         if (rc < 0)
2305                 return rc;
2306
2307         /* FIXME: read() is not prepared to allow changing the video
2308            resolution while streaming. Seems a bug at em28xx_set_fmt
2309          */
2310
2311         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2312                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2313                         return -EBUSY;
2314
2315                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2316                                         filp->f_flags & O_NONBLOCK);
2317         }
2318
2319
2320         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2321                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2322                         return -EBUSY;
2323
2324                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2325                                         filp->f_flags & O_NONBLOCK);
2326         }
2327
2328         return 0;
2329 }
2330
2331 /*
2332  * em28xx_v4l2_poll()
2333  * will allocate buffers when called for the first time
2334  */
2335 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2336 {
2337         struct em28xx_fh *fh = filp->private_data;
2338         struct em28xx *dev = fh->dev;
2339         int rc;
2340
2341         rc = check_dev(dev);
2342         if (rc < 0)
2343                 return rc;
2344
2345         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2346                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2347                         return POLLERR;
2348                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2349         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2350                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2351                         return POLLERR;
2352                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2353         } else {
2354                 return POLLERR;
2355         }
2356 }
2357
2358 /*
2359  * em28xx_v4l2_mmap()
2360  */
2361 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2362 {
2363         struct em28xx_fh *fh    = filp->private_data;
2364         struct em28xx    *dev   = fh->dev;
2365         int              rc;
2366
2367         rc = check_dev(dev);
2368         if (rc < 0)
2369                 return rc;
2370
2371         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2372                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2373         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2374                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2375
2376         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2377                 (unsigned long)vma->vm_start,
2378                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2379                 rc);
2380
2381         return rc;
2382 }
2383
2384 static const struct v4l2_file_operations em28xx_v4l_fops = {
2385         .owner         = THIS_MODULE,
2386         .open          = em28xx_v4l2_open,
2387         .release       = em28xx_v4l2_close,
2388         .read          = em28xx_v4l2_read,
2389         .poll          = em28xx_v4l2_poll,
2390         .mmap          = em28xx_v4l2_mmap,
2391         .unlocked_ioctl = video_ioctl2,
2392 };
2393
2394 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2395         .vidioc_querycap            = vidioc_querycap,
2396         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2397         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2398         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2399         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2400         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2401         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2402         .vidioc_enum_framesizes     = vidioc_enum_framesizes,
2403         .vidioc_g_audio             = vidioc_g_audio,
2404         .vidioc_s_audio             = vidioc_s_audio,
2405         .vidioc_cropcap             = vidioc_cropcap,
2406         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2407         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2408         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2409
2410         .vidioc_reqbufs             = vidioc_reqbufs,
2411         .vidioc_querybuf            = vidioc_querybuf,
2412         .vidioc_qbuf                = vidioc_qbuf,
2413         .vidioc_dqbuf               = vidioc_dqbuf,
2414         .vidioc_g_std               = vidioc_g_std,
2415         .vidioc_querystd            = vidioc_querystd,
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 };
2437
2438 static const struct video_device em28xx_video_template = {
2439         .fops                       = &em28xx_v4l_fops,
2440         .release                    = video_device_release,
2441         .ioctl_ops                  = &video_ioctl_ops,
2442
2443         .tvnorms                    = V4L2_STD_ALL,
2444         .current_norm               = V4L2_STD_PAL,
2445 };
2446
2447 static const struct v4l2_file_operations radio_fops = {
2448         .owner         = THIS_MODULE,
2449         .open          = em28xx_v4l2_open,
2450         .release       = em28xx_v4l2_close,
2451         .unlocked_ioctl = video_ioctl2,
2452 };
2453
2454 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2455         .vidioc_querycap      = radio_querycap,
2456         .vidioc_g_tuner       = radio_g_tuner,
2457         .vidioc_enum_input    = radio_enum_input,
2458         .vidioc_g_audio       = radio_g_audio,
2459         .vidioc_s_tuner       = radio_s_tuner,
2460         .vidioc_s_audio       = radio_s_audio,
2461         .vidioc_s_input       = radio_s_input,
2462         .vidioc_queryctrl     = radio_queryctrl,
2463         .vidioc_g_ctrl        = vidioc_g_ctrl,
2464         .vidioc_s_ctrl        = vidioc_s_ctrl,
2465         .vidioc_g_frequency   = vidioc_g_frequency,
2466         .vidioc_s_frequency   = vidioc_s_frequency,
2467 #ifdef CONFIG_VIDEO_ADV_DEBUG
2468         .vidioc_g_register    = vidioc_g_register,
2469         .vidioc_s_register    = vidioc_s_register,
2470 #endif
2471 };
2472
2473 static struct video_device em28xx_radio_template = {
2474         .name                 = "em28xx-radio",
2475         .fops                 = &radio_fops,
2476         .ioctl_ops            = &radio_ioctl_ops,
2477 };
2478
2479 /******************************** usb interface ******************************/
2480
2481
2482
2483 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2484                                         const struct video_device *template,
2485                                         const char *type_name)
2486 {
2487         struct video_device *vfd;
2488
2489         vfd = video_device_alloc();
2490         if (NULL == vfd)
2491                 return NULL;
2492
2493         *vfd            = *template;
2494         vfd->v4l2_dev   = &dev->v4l2_dev;
2495         vfd->release    = video_device_release;
2496         vfd->debug      = video_debug;
2497         vfd->lock       = &dev->lock;
2498         /* Locking in file operations other than ioctl should be done
2499            by the driver, not the V4L2 core.
2500            This driver needs auditing so that this flag can be removed. */
2501         set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
2502
2503         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2504                  dev->name, type_name);
2505
2506         video_set_drvdata(vfd, dev);
2507         return vfd;
2508 }
2509
2510 int em28xx_register_analog_devices(struct em28xx *dev)
2511 {
2512       u8 val;
2513         int ret;
2514         unsigned int maxw;
2515
2516         printk(KERN_INFO "%s: v4l2 driver version %s\n",
2517                 dev->name, EM28XX_VERSION);
2518
2519         /* set default norm */
2520         dev->norm = em28xx_video_template.current_norm;
2521         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
2522         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2523
2524         /* Analog specific initialization */
2525         dev->format = &format[0];
2526
2527         maxw = norm_maxw(dev);
2528         /* MaxPacketSize for em2800 is too small to capture at full resolution
2529          * use half of maxw as the scaler can only scale to 50% */
2530         if (dev->board.is_em2800)
2531             maxw /= 2;
2532
2533         em28xx_set_video_format(dev, format[0].fourcc,
2534                                 maxw, norm_maxh(dev));
2535
2536         video_mux(dev, 0);
2537
2538         /* Audio defaults */
2539         dev->mute = 1;
2540         dev->volume = 0x1f;
2541
2542 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2543         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2544         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2545                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2546
2547         em28xx_set_outfmt(dev);
2548         em28xx_colorlevels_set_default(dev);
2549         em28xx_compression_disable(dev);
2550
2551         /* allocate and fill video video_device struct */
2552         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2553         if (!dev->vdev) {
2554                 em28xx_errdev("cannot allocate video_device.\n");
2555                 return -ENODEV;
2556         }
2557
2558         /* register v4l2 video video_device */
2559         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2560                                        video_nr[dev->devno]);
2561         if (ret) {
2562                 em28xx_errdev("unable to register video device (error=%i).\n",
2563                               ret);
2564                 return ret;
2565         }
2566
2567         /* Allocate and fill vbi video_device struct */
2568         if (em28xx_vbi_supported(dev) == 1) {
2569                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2570                                                 "vbi");
2571
2572                 /* register v4l2 vbi video_device */
2573                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2574                                             vbi_nr[dev->devno]);
2575                 if (ret < 0) {
2576                         em28xx_errdev("unable to register vbi device\n");
2577                         return ret;
2578                 }
2579         }
2580
2581         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2582                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2583                                                   "radio");
2584                 if (!dev->radio_dev) {
2585                         em28xx_errdev("cannot allocate video_device.\n");
2586                         return -ENODEV;
2587                 }
2588                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2589                                             radio_nr[dev->devno]);
2590                 if (ret < 0) {
2591                         em28xx_errdev("can't register radio device\n");
2592                         return ret;
2593                 }
2594                 em28xx_info("Registered radio device as %s\n",
2595                             video_device_node_name(dev->radio_dev));
2596         }
2597
2598         em28xx_info("V4L2 video device registered as %s\n",
2599                     video_device_node_name(dev->vdev));
2600
2601         if (dev->vbi_dev)
2602                 em28xx_info("V4L2 VBI device registered as %s\n",
2603                             video_device_node_name(dev->vbi_dev));
2604
2605         return 0;
2606 }