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

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
   3                     video capture devices
   4
   5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   6                       Markus Rechberger <mrechberger@gmail.com>
   7                       Mauro Carvalho Chehab <mchehab@infradead.org>
   8                       Sascha Sommer <saschasommer@freenet.de>
   9
  10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  11                 by Luca Risolia <luca.risolia@studio.unibo.it>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/bitmap.h>
  33 #include <linux/usb.h>
  34 #include <linux/i2c.h>
  35 #include <linux/version.h>
  36 #include <linux/mm.h>
  37 #include <linux/mutex.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/v4l2-chip-ident.h>
  43 #include <media/msp3400.h>
  44 #include <media/tuner.h>
  45
  46 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  47                       "Markus Rechberger <mrechberger@gmail.com>, " \
  48                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  49                       "Sascha Sommer <saschasommer@freenet.de>"
  50
  51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  52 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 2)
  53
  54 #define em28xx_videodbg(fmt, arg...) do {\
  55         if (video_debug) \
  56                 printk(KERN_INFO "%s %s :"fmt, \
  57                          dev->name, __func__ , ##arg); } while (0)
  58
  59 static unsigned int isoc_debug;
  60 module_param(isoc_debug, int, 0644);
  61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  62
  63 #define em28xx_isocdbg(fmt, arg...) \
  64 do {\
  65         if (isoc_debug) { \
  66                 printk(KERN_INFO "%s %s :"fmt, \
  67                          dev->name, __func__ , ##arg); \
  68         } \
  69   } while (0)
  70
  71 MODULE_AUTHOR(DRIVER_AUTHOR);
  72 MODULE_DESCRIPTION(DRIVER_DESC);
  73 MODULE_LICENSE("GPL");
  74
  75 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  76 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  77 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78
  79 module_param_array(video_nr, int, NULL, 0444);
  80 module_param_array(vbi_nr, int, NULL, 0444);
  81 module_param_array(radio_nr, int, NULL, 0444);
  82 MODULE_PARM_DESC(video_nr, "video device numbers");
  83 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  84 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  85
  86 static unsigned int video_debug;
  87 module_param(video_debug, int, 0644);
  88 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  89
  90 /* supported video standards */
  91 static struct em28xx_fmt format[] = {
  92         {
  93                 .name     = "16 bpp YUY2, 4:2:2, packed",
  94                 .fourcc   = V4L2_PIX_FMT_YUYV,
  95                 .depth    = 16,
  96                 .reg      = EM28XX_OUTFMT_YUV422_Y0UY1V,
  97         }, {
  98                 .name     = "16 bpp RGB 565, LE",
  99                 .fourcc   = V4L2_PIX_FMT_RGB565,
 100                 .depth    = 16,
 101                 .reg      = EM28XX_OUTFMT_RGB_16_656,
 102         }, {
 103                 .name     = "8 bpp Bayer BGBG..GRGR",
 104                 .fourcc   = V4L2_PIX_FMT_SBGGR8,
 105                 .depth    = 8,
 106                 .reg      = EM28XX_OUTFMT_RGB_8_BGBG,
 107         }, {
 108                 .name     = "8 bpp Bayer GRGR..BGBG",
 109                 .fourcc   = V4L2_PIX_FMT_SGRBG8,
 110                 .depth    = 8,
 111                 .reg      = EM28XX_OUTFMT_RGB_8_GRGR,
 112         }, {
 113                 .name     = "8 bpp Bayer GBGB..RGRG",
 114                 .fourcc   = V4L2_PIX_FMT_SGBRG8,
 115                 .depth    = 8,
 116                 .reg      = EM28XX_OUTFMT_RGB_8_GBGB,
 117         }, {
 118                 .name     = "12 bpp YUV411",
 119                 .fourcc   = V4L2_PIX_FMT_YUV411P,
 120                 .depth    = 12,
 121                 .reg      = EM28XX_OUTFMT_YUV411,
 122         },
 123 };
 124
 125 /* supported controls */
 126 /* Common to all boards */
 127 static struct v4l2_queryctrl ac97_qctrl[] = {
 128         {
 129                 .id = V4L2_CID_AUDIO_VOLUME,
 130                 .type = V4L2_CTRL_TYPE_INTEGER,
 131                 .name = "Volume",
 132                 .minimum = 0x0,
 133                 .maximum = 0x1f,
 134                 .step = 0x1,
 135                 .default_value = 0x1f,
 136                 .flags = V4L2_CTRL_FLAG_SLIDER,
 137         }, {
 138                 .id = V4L2_CID_AUDIO_MUTE,
 139                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 140                 .name = "Mute",
 141                 .minimum = 0,
 142                 .maximum = 1,
 143                 .step = 1,
 144                 .default_value = 1,
 145                 .flags = 0,
 146         }
 147 };
 148
 149 /* ------------------------------------------------------------------
 150         DMA and thread functions
 151    ------------------------------------------------------------------*/
 152
 153 /*
 154  * Announces that a buffer were filled and request the next
 155  */
 156 static inline void buffer_filled(struct em28xx *dev,
 157                                   struct em28xx_dmaqueue *dma_q,
 158                                   struct em28xx_buffer *buf)
 159 {
 160         /* Advice that buffer was filled */
 161         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 162         buf->vb.state = VIDEOBUF_DONE;
 163         buf->vb.field_count++;
 164         do_gettimeofday(&buf->vb.ts);
 165
 166         dev->isoc_ctl.vid_buf = NULL;
 167
 168         list_del(&buf->vb.queue);
 169         wake_up(&buf->vb.done);
 170 }
 171
 172 static inline void vbi_buffer_filled(struct em28xx *dev,
 173                                      struct em28xx_dmaqueue *dma_q,
 174                                      struct em28xx_buffer *buf)
 175 {
 176         /* Advice that buffer was filled */
 177         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 178
 179         buf->vb.state = VIDEOBUF_DONE;
 180         buf->vb.field_count++;
 181         do_gettimeofday(&buf->vb.ts);
 182
 183         dev->isoc_ctl.vbi_buf = NULL;
 184
 185         list_del(&buf->vb.queue);
 186         wake_up(&buf->vb.done);
 187 }
 188
 189 /*
 190  * Identify the buffer header type and properly handles
 191  */
 192 static void em28xx_copy_video(struct em28xx *dev,
 193                               struct em28xx_dmaqueue  *dma_q,
 194                               struct em28xx_buffer *buf,
 195                               unsigned char *p,
 196                               unsigned char *outp, unsigned long len)
 197 {
 198         void *fieldstart, *startwrite, *startread;
 199         int  linesdone, currlinedone, offset, lencopy, remain;
 200         int bytesperline = dev->width << 1;
 201
 202         if (dma_q->pos + len > buf->vb.size)
 203                 len = buf->vb.size - dma_q->pos;
 204
 205         if (p[0] != 0x88 && p[0] != 0x22) {
 206                 em28xx_isocdbg("frame is not complete\n");
 207                 len += 4;
 208         } else
 209                 p += 4;
 210
 211         startread = p;
 212         remain = len;
 213
 214         if (dev->progressive)
 215                 fieldstart = outp;
 216         else {
 217                 /* Interlaces two half frames */
 218                 if (buf->top_field)
 219                         fieldstart = outp;
 220                 else
 221                         fieldstart = outp + bytesperline;
 222         }
 223
 224         linesdone = dma_q->pos / bytesperline;
 225         currlinedone = dma_q->pos % bytesperline;
 226
 227         if (dev->progressive)
 228                 offset = linesdone * bytesperline + currlinedone;
 229         else
 230                 offset = linesdone * bytesperline * 2 + currlinedone;
 231
 232         startwrite = fieldstart + offset;
 233         lencopy = bytesperline - currlinedone;
 234         lencopy = lencopy > remain ? remain : lencopy;
 235
 236         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 237                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 238                                ((char *)startwrite + lencopy) -
 239                                ((char *)outp + buf->vb.size));
 240                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
 241                 lencopy = remain;
 242         }
 243         if (lencopy <= 0)
 244                 return;
 245         memcpy(startwrite, startread, lencopy);
 246
 247         remain -= lencopy;
 248
 249         while (remain > 0) {
 250                 startwrite += lencopy + bytesperline;
 251                 startread += lencopy;
 252                 if (bytesperline > remain)
 253                         lencopy = remain;
 254                 else
 255                         lencopy = bytesperline;
 256
 257                 if ((char *)startwrite + lencopy > (char *)outp +
 258                     buf->vb.size) {
 259                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 260                                        ((char *)startwrite + lencopy) -
 261                                        ((char *)outp + buf->vb.size));
 262                         lencopy = remain = (char *)outp + buf->vb.size -
 263                                            (char *)startwrite;
 264                 }
 265                 if (lencopy <= 0)
 266                         break;
 267
 268                 memcpy(startwrite, startread, lencopy);
 269
 270                 remain -= lencopy;
 271         }
 272
 273         dma_q->pos += len;
 274 }
 275
 276 static void em28xx_copy_vbi(struct em28xx *dev,
 277                               struct em28xx_dmaqueue  *dma_q,
 278                               struct em28xx_buffer *buf,
 279                               unsigned char *p,
 280                               unsigned char *outp, unsigned long len)
 281 {
 282         void *startwrite, *startread;
 283         int  offset;
 284         int bytesperline = 720;
 285
 286         if (dev == NULL) {
 287                 printk("dev is null\n");
 288                 return;
 289         }
 290
 291         if (dma_q == NULL) {
 292                 printk("dma_q is null\n");
 293                 return;
 294         }
 295         if (buf == NULL) {
 296                 return;
 297         }
 298         if (p == NULL) {
 299                 printk("p is null\n");
 300                 return;
 301         }
 302         if (outp == NULL) {
 303                 printk("outp is null\n");
 304                 return;
 305         }
 306
 307         if (dma_q->pos + len > buf->vb.size)
 308                 len = buf->vb.size - dma_q->pos;
 309
 310         if ((p[0] == 0x33 && p[1] == 0x95) ||
 311             (p[0] == 0x88 && p[1] == 0x88)) {
 312                 /* Header field, advance past it */
 313                 p += 4;
 314         } else {
 315                 len += 4;
 316         }
 317
 318         startread = p;
 319
 320         startwrite = outp + dma_q->pos;
 321         offset = dma_q->pos;
 322
 323         /* Make sure the bottom field populates the second half of the frame */
 324         if (buf->top_field == 0) {
 325                 startwrite += bytesperline * 0x0c;
 326                 offset += bytesperline * 0x0c;
 327         }
 328
 329         memcpy(startwrite, startread, len);
 330         dma_q->pos += len;
 331 }
 332
 333 static inline void print_err_status(struct em28xx *dev,
 334                                      int packet, int status)
 335 {
 336         char *errmsg = "Unknown";
 337
 338         switch (status) {
 339         case -ENOENT:
 340                 errmsg = "unlinked synchronuously";
 341                 break;
 342         case -ECONNRESET:
 343                 errmsg = "unlinked asynchronuously";
 344                 break;
 345         case -ENOSR:
 346                 errmsg = "Buffer error (overrun)";
 347                 break;
 348         case -EPIPE:
 349                 errmsg = "Stalled (device not responding)";
 350                 break;
 351         case -EOVERFLOW:
 352                 errmsg = "Babble (bad cable?)";
 353                 break;
 354         case -EPROTO:
 355                 errmsg = "Bit-stuff error (bad cable?)";
 356                 break;
 357         case -EILSEQ:
 358                 errmsg = "CRC/Timeout (could be anything)";
 359                 break;
 360         case -ETIME:
 361                 errmsg = "Device does not respond";
 362                 break;
 363         }
 364         if (packet < 0) {
 365                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 366         } else {
 367                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 368                                packet, status, errmsg);
 369         }
 370 }
 371
 372 /*
 373  * video-buf generic routine to get the next available buffer
 374  */
 375 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 376                                           struct em28xx_buffer **buf)
 377 {
 378         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 379         char *outp;
 380
 381         if (list_empty(&dma_q->active)) {
 382                 em28xx_isocdbg("No active queue to serve\n");
 383                 dev->isoc_ctl.vid_buf = NULL;
 384                 *buf = NULL;
 385                 return;
 386         }
 387
 388         /* Get the next buffer */
 389         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 390
 391         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 392         outp = videobuf_to_vmalloc(&(*buf)->vb);
 393         memset(outp, 0, (*buf)->vb.size);
 394
 395         dev->isoc_ctl.vid_buf = *buf;
 396
 397         return;
 398 }
 399
 400 /*
 401  * video-buf generic routine to get the next available VBI buffer
 402  */
 403 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 404                                     struct em28xx_buffer **buf)
 405 {
 406         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 407         char *outp;
 408
 409         if (list_empty(&dma_q->active)) {
 410                 em28xx_isocdbg("No active queue to serve\n");
 411                 dev->isoc_ctl.vbi_buf = NULL;
 412                 *buf = NULL;
 413                 return;
 414         }
 415
 416         /* Get the next buffer */
 417         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 418         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 419         outp = videobuf_to_vmalloc(&(*buf)->vb);
 420         memset(outp, 0x00, (*buf)->vb.size);
 421
 422         dev->isoc_ctl.vbi_buf = *buf;
 423
 424         return;
 425 }
 426
 427 /*
 428  * Controls the isoc copy of each urb packet
 429  */
 430 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 431 {
 432         struct em28xx_buffer    *buf;
 433         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 434         unsigned char *outp = NULL;
 435         int i, len = 0, rc = 1;
 436         unsigned char *p;
 437
 438         if (!dev)
 439                 return 0;
 440
 441         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 442                 return 0;
 443
 444         if (urb->status < 0) {
 445                 print_err_status(dev, -1, urb->status);
 446                 if (urb->status == -ENOENT)
 447                         return 0;
 448         }
 449
 450         buf = dev->isoc_ctl.vid_buf;
 451         if (buf != NULL)
 452                 outp = videobuf_to_vmalloc(&buf->vb);
 453
 454         for (i = 0; i < urb->number_of_packets; i++) {
 455                 int status = urb->iso_frame_desc[i].status;
 456
 457                 if (status < 0) {
 458                         print_err_status(dev, i, status);
 459                         if (urb->iso_frame_desc[i].status != -EPROTO)
 460                                 continue;
 461                 }
 462
 463                 len = urb->iso_frame_desc[i].actual_length - 4;
 464
 465                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 466                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 467                         continue;
 468                 }
 469                 if (urb->iso_frame_desc[i].actual_length >
 470                                                 dev->max_pkt_size) {
 471                         em28xx_isocdbg("packet bigger than packet size");
 472                         continue;
 473                 }
 474
 475                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 476
 477                 /* FIXME: incomplete buffer checks where removed to make
 478                    logic simpler. Impacts of those changes should be evaluated
 479                  */
 480                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 481                         em28xx_isocdbg("VBI HEADER!!!\n");
 482                         /* FIXME: Should add vbi copy */
 483                         continue;
 484                 }
 485                 if (p[0] == 0x22 && p[1] == 0x5a) {
 486                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 487                                        len, (p[2] & 1) ? "odd" : "even");
 488
 489                         if (dev->progressive || !(p[2] & 1)) {
 490                                 if (buf != NULL)
 491                                         buffer_filled(dev, dma_q, buf);
 492                                 get_next_buf(dma_q, &buf);
 493                                 if (buf == NULL)
 494                                         outp = NULL;
 495                                 else
 496                                         outp = videobuf_to_vmalloc(&buf->vb);
 497                         }
 498
 499                         if (buf != NULL) {
 500                                 if (p[2] & 1)
 501                                         buf->top_field = 0;
 502                                 else
 503                                         buf->top_field = 1;
 504                         }
 505
 506                         dma_q->pos = 0;
 507                 }
 508                 if (buf != NULL)
 509                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 510         }
 511         return rc;
 512 }
 513
 514 /* Version of isoc handler that takes into account a mixture of video and
 515    VBI data */
 516 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 517 {
 518         struct em28xx_buffer    *buf, *vbi_buf;
 519         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 520         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 521         unsigned char *outp = NULL;
 522         unsigned char *vbioutp = NULL;
 523         int i, len = 0, rc = 1;
 524         unsigned char *p;
 525         int vbi_size;
 526
 527         if (!dev)
 528                 return 0;
 529
 530         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 531                 return 0;
 532
 533         if (urb->status < 0) {
 534                 print_err_status(dev, -1, urb->status);
 535                 if (urb->status == -ENOENT)
 536                         return 0;
 537         }
 538
 539         buf = dev->isoc_ctl.vid_buf;
 540         if (buf != NULL)
 541                 outp = videobuf_to_vmalloc(&buf->vb);
 542
 543         vbi_buf = dev->isoc_ctl.vbi_buf;
 544         if (vbi_buf != NULL)
 545                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 546
 547         for (i = 0; i < urb->number_of_packets; i++) {
 548                 int status = urb->iso_frame_desc[i].status;
 549
 550                 if (status < 0) {
 551                         print_err_status(dev, i, status);
 552                         if (urb->iso_frame_desc[i].status != -EPROTO)
 553                                 continue;
 554                 }
 555
 556                 len = urb->iso_frame_desc[i].actual_length - 4;
 557
 558                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 559                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 560                         continue;
 561                 }
 562                 if (urb->iso_frame_desc[i].actual_length >
 563                                                 dev->max_pkt_size) {
 564                         em28xx_isocdbg("packet bigger than packet size");
 565                         continue;
 566                 }
 567
 568                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 569
 570                 /* capture type 0 = vbi start
 571                    capture type 1 = video start
 572                    capture type 2 = video in progress */
 573                 if (p[0] == 0x33 && p[1] == 0x95) {
 574                         dev->capture_type = 0;
 575                         dev->vbi_read = 0;
 576                         em28xx_isocdbg("VBI START HEADER!!!\n");
 577                         dev->cur_field = p[2];
 578                 }
 579
 580                 /* FIXME: get rid of hard-coded value */
 581                 vbi_size = 720 * 0x0c;
 582
 583                 if (dev->capture_type == 0) {
 584                         if (dev->vbi_read >= vbi_size) {
 585                                 /* We've already read all the VBI data, so
 586                                    treat the rest as video */
 587                                 printk("djh c should never happen\n");
 588                         } else if ((dev->vbi_read + len) < vbi_size) {
 589                                 /* This entire frame is VBI data */
 590                                 if (dev->vbi_read == 0 &&
 591                                     (!(dev->cur_field & 1))) {
 592                                         /* Brand new frame */
 593                                         if (vbi_buf != NULL)
 594                                                 vbi_buffer_filled(dev,
 595                                                                   vbi_dma_q,
 596                                                                   vbi_buf);
 597                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 598                                         if (vbi_buf == NULL)
 599                                                 vbioutp = NULL;
 600                                         else {
 601                                                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 602                                         }
 603                                 }
 604
 605                                 if (dev->vbi_read == 0) {
 606                                         vbi_dma_q->pos = 0;
 607                                         if (vbi_buf != NULL) {
 608                                                 if (dev->cur_field & 1)
 609                                                         vbi_buf->top_field = 0;
 610                                                 else
 611                                                         vbi_buf->top_field = 1;
 612                                         }
 613                                 }
 614
 615                                 dev->vbi_read += len;
 616                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 617                                                 vbioutp, len);
 618                         } else {
 619                                 /* Some of this frame is VBI data and some is
 620                                    video data */
 621                                 int vbi_data_len = vbi_size - dev->vbi_read;
 622                                 dev->vbi_read += vbi_data_len;
 623                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 624                                                 vbioutp, vbi_data_len);
 625                                 dev->capture_type = 1;
 626                                 p += vbi_data_len;
 627                                 len -= vbi_data_len;
 628                         }
 629                 }
 630
 631                 if (dev->capture_type == 1) {
 632                         dev->capture_type = 2;
 633                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 634                                        len, (p[2] & 1) ? "odd" : "even");
 635
 636                         if (dev->progressive || !(dev->cur_field & 1)) {
 637                                 if (buf != NULL)
 638                                         buffer_filled(dev, dma_q, buf);
 639                                 get_next_buf(dma_q, &buf);
 640                                 if (buf == NULL)
 641                                         outp = NULL;
 642                                 else
 643                                         outp = videobuf_to_vmalloc(&buf->vb);
 644                         }
 645                         if (buf != NULL) {
 646                                 if (dev->cur_field & 1)
 647                                         buf->top_field = 0;
 648                                 else
 649                                         buf->top_field = 1;
 650                         }
 651
 652                         dma_q->pos = 0;
 653                 }
 654                 if (buf != NULL && dev->capture_type == 2)
 655                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 656         }
 657         return rc;
 658 }
 659
 660
 661 /* ------------------------------------------------------------------
 662         Videobuf operations
 663    ------------------------------------------------------------------*/
 664
 665 static int
 666 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 667 {
 668         struct em28xx_fh *fh = vq->priv_data;
 669         struct em28xx        *dev = fh->dev;
 670         struct v4l2_frequency f;
 671
 672         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
 673
 674         if (0 == *count)
 675                 *count = EM28XX_DEF_BUF;
 676
 677         if (*count < EM28XX_MIN_BUF)
 678                 *count = EM28XX_MIN_BUF;
 679
 680         /* Ask tuner to go to analog or radio mode */
 681         memset(&f, 0, sizeof(f));
 682         f.frequency = dev->ctl_freq;
 683         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 684
 685         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 686
 687         return 0;
 688 }
 689
 690 /* This is called *without* dev->slock held; please keep it that way */
 691 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 692 {
 693         struct em28xx_fh     *fh  = vq->priv_data;
 694         struct em28xx        *dev = fh->dev;
 695         unsigned long flags = 0;
 696         if (in_interrupt())
 697                 BUG();
 698
 699         /* We used to wait for the buffer to finish here, but this didn't work
 700            because, as we were keeping the state as VIDEOBUF_QUEUED,
 701            videobuf_queue_cancel marked it as finished for us.
 702            (Also, it could wedge forever if the hardware was misconfigured.)
 703
 704            This should be safe; by the time we get here, the buffer isn't
 705            queued anymore. If we ever start marking the buffers as
 706            VIDEOBUF_ACTIVE, it won't be, though.
 707         */
 708         spin_lock_irqsave(&dev->slock, flags);
 709         if (dev->isoc_ctl.vid_buf == buf)
 710                 dev->isoc_ctl.vid_buf = NULL;
 711         spin_unlock_irqrestore(&dev->slock, flags);
 712
 713         videobuf_vmalloc_free(&buf->vb);
 714         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 715 }
 716
 717 static int
 718 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 719                                                 enum v4l2_field field)
 720 {
 721         struct em28xx_fh     *fh  = vq->priv_data;
 722         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 723         struct em28xx        *dev = fh->dev;
 724         int                  rc = 0, urb_init = 0;
 725
 726         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
 727
 728         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 729                 return -EINVAL;
 730
 731         buf->vb.width  = dev->width;
 732         buf->vb.height = dev->height;
 733         buf->vb.field  = field;
 734
 735         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 736                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 737                 if (rc < 0)
 738                         goto fail;
 739         }
 740
 741         if (!dev->isoc_ctl.num_bufs)
 742                 urb_init = 1;
 743
 744         if (urb_init) {
 745                 if (em28xx_vbi_supported(dev) == 1)
 746                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 747                                               EM28XX_NUM_BUFS,
 748                                               dev->max_pkt_size,
 749                                               em28xx_isoc_copy_vbi);
 750                 else
 751                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 752                                               EM28XX_NUM_BUFS,
 753                                               dev->max_pkt_size,
 754                                               em28xx_isoc_copy);
 755                 if (rc < 0)
 756                         goto fail;
 757         }
 758
 759         buf->vb.state = VIDEOBUF_PREPARED;
 760         return 0;
 761
 762 fail:
 763         free_buffer(vq, buf);
 764         return rc;
 765 }
 766
 767 static void
 768 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 769 {
 770         struct em28xx_buffer    *buf     = container_of(vb,
 771                                                         struct em28xx_buffer,
 772                                                         vb);
 773         struct em28xx_fh        *fh      = vq->priv_data;
 774         struct em28xx           *dev     = fh->dev;
 775         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 776
 777         buf->vb.state = VIDEOBUF_QUEUED;
 778         list_add_tail(&buf->vb.queue, &vidq->active);
 779
 780 }
 781
 782 static void buffer_release(struct videobuf_queue *vq,
 783                                 struct videobuf_buffer *vb)
 784 {
 785         struct em28xx_buffer   *buf  = container_of(vb,
 786                                                     struct em28xx_buffer,
 787                                                     vb);
 788         struct em28xx_fh       *fh   = vq->priv_data;
 789         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 790
 791         em28xx_isocdbg("em28xx: called buffer_release\n");
 792
 793         free_buffer(vq, buf);
 794 }
 795
 796 static struct videobuf_queue_ops em28xx_video_qops = {
 797         .buf_setup      = buffer_setup,
 798         .buf_prepare    = buffer_prepare,
 799         .buf_queue      = buffer_queue,
 800         .buf_release    = buffer_release,
 801 };
 802
 803 /*********************  v4l2 interface  **************************************/
 804
 805 static void video_mux(struct em28xx *dev, int index)
 806 {
 807         dev->ctl_input = index;
 808         dev->ctl_ainput = INPUT(index)->amux;
 809         dev->ctl_aoutput = INPUT(index)->aout;
 810
 811         if (!dev->ctl_aoutput)
 812                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 813
 814         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 815                         INPUT(index)->vmux, 0, 0);
 816
 817         if (dev->board.has_msp34xx) {
 818                 if (dev->i2s_speed) {
 819                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 820                                 s_i2s_clock_freq, dev->i2s_speed);
 821                 }
 822                 /* Note: this is msp3400 specific */
 823                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 824                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 825         }
 826
 827         if (dev->board.adecoder != EM28XX_NOADECODER) {
 828                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 829                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 830         }
 831
 832         em28xx_audio_analog_set(dev);
 833 }
 834
 835 /* Usage lock check functions */
 836 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 837 {
 838         struct em28xx    *dev = fh->dev;
 839
 840         if (fh->resources & bit)
 841                 /* have it already allocated */
 842                 return 1;
 843
 844         /* is it free? */
 845         mutex_lock(&dev->lock);
 846         if (dev->resources & bit) {
 847                 /* no, someone else uses it */
 848                 mutex_unlock(&dev->lock);
 849                 return 0;
 850         }
 851         /* it's free, grab it */
 852         fh->resources  |= bit;
 853         dev->resources |= bit;
 854         em28xx_videodbg("res: get %d\n", bit);
 855         mutex_unlock(&dev->lock);
 856         return 1;
 857 }
 858
 859 static int res_check(struct em28xx_fh *fh, unsigned int bit)
 860 {
 861         return (fh->resources & bit);
 862 }
 863
 864 static int res_locked(struct em28xx *dev, unsigned int bit)
 865 {
 866         return (dev->resources & bit);
 867 }
 868
 869 static void res_free(struct em28xx_fh *fh, unsigned int bits)
 870 {
 871         struct em28xx    *dev = fh->dev;
 872
 873         BUG_ON((fh->resources & bits) != bits);
 874
 875         mutex_lock(&dev->lock);
 876         fh->resources  &= ~bits;
 877         dev->resources &= ~bits;
 878         em28xx_videodbg("res: put %d\n", bits);
 879         mutex_unlock(&dev->lock);
 880 }
 881
 882 static int get_ressource(struct em28xx_fh *fh)
 883 {
 884         switch (fh->type) {
 885         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 886                 return EM28XX_RESOURCE_VIDEO;
 887         case V4L2_BUF_TYPE_VBI_CAPTURE:
 888                 return EM28XX_RESOURCE_VBI;
 889         default:
 890                 BUG();
 891                 return 0;
 892         }
 893 }
 894
 895 /*
 896  * ac97_queryctrl()
 897  * return the ac97 supported controls
 898  */
 899 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 900 {
 901         int i;
 902
 903         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 904                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 905                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 906                         return 0;
 907                 }
 908         }
 909
 910         /* Control is not ac97 related */
 911         return 1;
 912 }
 913
 914 /*
 915  * ac97_get_ctrl()
 916  * return the current values for ac97 mute and volume
 917  */
 918 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 919 {
 920         switch (ctrl->id) {
 921         case V4L2_CID_AUDIO_MUTE:
 922                 ctrl->value = dev->mute;
 923                 return 0;
 924         case V4L2_CID_AUDIO_VOLUME:
 925                 ctrl->value = dev->volume;
 926                 return 0;
 927         default:
 928                 /* Control is not ac97 related */
 929                 return 1;
 930         }
 931 }
 932
 933 /*
 934  * ac97_set_ctrl()
 935  * set values for ac97 mute and volume
 936  */
 937 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 938 {
 939         int i;
 940
 941         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 942                 if (ctrl->id == ac97_qctrl[i].id)
 943                         goto handle;
 944
 945         /* Announce that hasn't handle it */
 946         return 1;
 947
 948 handle:
 949         if (ctrl->value < ac97_qctrl[i].minimum ||
 950             ctrl->value > ac97_qctrl[i].maximum)
 951                 return -ERANGE;
 952
 953         switch (ctrl->id) {
 954         case V4L2_CID_AUDIO_MUTE:
 955                 dev->mute = ctrl->value;
 956                 break;
 957         case V4L2_CID_AUDIO_VOLUME:
 958                 dev->volume = ctrl->value;
 959                 break;
 960         }
 961
 962         return em28xx_audio_analog_set(dev);
 963 }
 964
 965 static int check_dev(struct em28xx *dev)
 966 {
 967         if (dev->state & DEV_DISCONNECTED) {
 968                 em28xx_errdev("v4l2 ioctl: device not present\n");
 969                 return -ENODEV;
 970         }
 971
 972         if (dev->state & DEV_MISCONFIGURED) {
 973                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 974                               "close and open it again\n");
 975                 return -EIO;
 976         }
 977         return 0;
 978 }
 979
 980 static void get_scale(struct em28xx *dev,
 981                         unsigned int width, unsigned int height,
 982                         unsigned int *hscale, unsigned int *vscale)
 983 {
 984         unsigned int          maxw = norm_maxw(dev);
 985         unsigned int          maxh = norm_maxh(dev);
 986
 987         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 988         if (*hscale >= 0x4000)
 989                 *hscale = 0x3fff;
 990
 991         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 992         if (*vscale >= 0x4000)
 993                 *vscale = 0x3fff;
 994 }
 995
 996 /* ------------------------------------------------------------------
 997         IOCTL vidioc handling
 998    ------------------------------------------------------------------*/
 999
1000 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1001                                         struct v4l2_format *f)
1002 {
1003         struct em28xx_fh      *fh  = priv;
1004         struct em28xx         *dev = fh->dev;
1005
1006         mutex_lock(&dev->lock);
1007
1008         f->fmt.pix.width = dev->width;
1009         f->fmt.pix.height = dev->height;
1010         f->fmt.pix.pixelformat = dev->format->fourcc;
1011         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1012         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1013         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1014
1015         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1016         if (dev->progressive)
1017                 f->fmt.pix.field = V4L2_FIELD_NONE;
1018         else
1019                 f->fmt.pix.field = dev->interlaced ?
1020                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1021
1022         mutex_unlock(&dev->lock);
1023         return 0;
1024 }
1025
1026 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1027 {
1028         unsigned int i;
1029
1030         for (i = 0; i < ARRAY_SIZE(format); i++)
1031                 if (format[i].fourcc == fourcc)
1032                         return &format[i];
1033
1034         return NULL;
1035 }
1036
1037 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1038                         struct v4l2_format *f)
1039 {
1040         struct em28xx_fh      *fh    = priv;
1041         struct em28xx         *dev   = fh->dev;
1042         unsigned int          width  = f->fmt.pix.width;
1043         unsigned int          height = f->fmt.pix.height;
1044         unsigned int          maxw   = norm_maxw(dev);
1045         unsigned int          maxh   = norm_maxh(dev);
1046         unsigned int          hscale, vscale;
1047         struct em28xx_fmt     *fmt;
1048
1049         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1050         if (!fmt) {
1051                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1052                                 f->fmt.pix.pixelformat);
1053                 return -EINVAL;
1054         }
1055
1056         if (dev->board.is_em2800) {
1057                 /* the em2800 can only scale down to 50% */
1058                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1059                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1060                 /* According to empiatech support the MaxPacketSize is too small
1061                  * to support framesizes larger than 640x480 @ 30 fps or 640x576
1062                  * @ 25 fps.  As this would cut of a part of the image we prefer
1063                  * 360x576 or 360x480 for now */
1064                 if (width == maxw && height == maxh)
1065                         width /= 2;
1066         } else {
1067                 /* width must even because of the YUYV format
1068                    height must be even because of interlacing */
1069                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0);
1070         }
1071
1072         get_scale(dev, width, height, &hscale, &vscale);
1073
1074         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1075         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1076
1077         f->fmt.pix.width = width;
1078         f->fmt.pix.height = height;
1079         f->fmt.pix.pixelformat = fmt->fourcc;
1080         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1081         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1082         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1083         if (dev->progressive)
1084                 f->fmt.pix.field = V4L2_FIELD_NONE;
1085         else
1086                 f->fmt.pix.field = dev->interlaced ?
1087                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1088
1089         return 0;
1090 }
1091
1092 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1093                                    unsigned width, unsigned height)
1094 {
1095         struct em28xx_fmt     *fmt;
1096
1097         fmt = format_by_fourcc(fourcc);
1098         if (!fmt)
1099                 return -EINVAL;
1100
1101         dev->format = fmt;
1102         dev->width  = width;
1103         dev->height = height;
1104
1105         /* set new image size */
1106         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1107
1108         em28xx_set_alternate(dev);
1109         em28xx_resolution_set(dev);
1110
1111         return 0;
1112 }
1113
1114 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1115                         struct v4l2_format *f)
1116 {
1117         struct em28xx_fh      *fh  = priv;
1118         struct em28xx         *dev = fh->dev;
1119         int                   rc;
1120
1121         rc = check_dev(dev);
1122         if (rc < 0)
1123                 return rc;
1124
1125         mutex_lock(&dev->lock);
1126
1127         vidioc_try_fmt_vid_cap(file, priv, f);
1128
1129         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1130                 em28xx_errdev("%s queue busy\n", __func__);
1131                 rc = -EBUSY;
1132                 goto out;
1133         }
1134
1135         rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1136                                 f->fmt.pix.width, f->fmt.pix.height);
1137
1138 out:
1139         mutex_unlock(&dev->lock);
1140         return rc;
1141 }
1142
1143 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1144 {
1145         struct em28xx_fh   *fh  = priv;
1146         struct em28xx      *dev = fh->dev;
1147         struct v4l2_format f;
1148         int                rc;
1149
1150         rc = check_dev(dev);
1151         if (rc < 0)
1152                 return rc;
1153
1154         mutex_lock(&dev->lock);
1155         dev->norm = *norm;
1156
1157         /* Adjusts width/height, if needed */
1158         f.fmt.pix.width = dev->width;
1159         f.fmt.pix.height = dev->height;
1160         vidioc_try_fmt_vid_cap(file, priv, &f);
1161
1162         /* set new image size */
1163         dev->width = f.fmt.pix.width;
1164         dev->height = f.fmt.pix.height;
1165         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1166
1167         em28xx_resolution_set(dev);
1168         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1169
1170         mutex_unlock(&dev->lock);
1171         return 0;
1172 }
1173
1174 static int vidioc_g_parm(struct file *file, void *priv,
1175                          struct v4l2_streamparm *p)
1176 {
1177         struct em28xx_fh   *fh  = priv;
1178         struct em28xx      *dev = fh->dev;
1179         int rc = 0;
1180
1181         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1182                 return -EINVAL;
1183
1184         if (dev->board.is_webcam)
1185                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1186                                                 video, g_parm, p);
1187         else
1188                 v4l2_video_std_frame_period(dev->norm,
1189                                                  &p->parm.capture.timeperframe);
1190
1191         return rc;
1192 }
1193
1194 static int vidioc_s_parm(struct file *file, void *priv,
1195                          struct v4l2_streamparm *p)
1196 {
1197         struct em28xx_fh   *fh  = priv;
1198         struct em28xx      *dev = fh->dev;
1199
1200         if (!dev->board.is_webcam)
1201                 return -EINVAL;
1202
1203         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1204                 return -EINVAL;
1205
1206         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1207 }
1208
1209 static const char *iname[] = {
1210         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1211         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1212         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1213         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1214         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1215         [EM28XX_VMUX_TELEVISION] = "Television",
1216         [EM28XX_VMUX_CABLE]      = "Cable TV",
1217         [EM28XX_VMUX_DVB]        = "DVB",
1218         [EM28XX_VMUX_DEBUG]      = "for debug only",
1219 };
1220
1221 static int vidioc_enum_input(struct file *file, void *priv,
1222                                 struct v4l2_input *i)
1223 {
1224         struct em28xx_fh   *fh  = priv;
1225         struct em28xx      *dev = fh->dev;
1226         unsigned int       n;
1227
1228         n = i->index;
1229         if (n >= MAX_EM28XX_INPUT)
1230                 return -EINVAL;
1231         if (0 == INPUT(n)->type)
1232                 return -EINVAL;
1233
1234         i->index = n;
1235         i->type = V4L2_INPUT_TYPE_CAMERA;
1236
1237         strcpy(i->name, iname[INPUT(n)->type]);
1238
1239         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1240                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1241                 i->type = V4L2_INPUT_TYPE_TUNER;
1242
1243         i->std = dev->vdev->tvnorms;
1244
1245         return 0;
1246 }
1247
1248 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1249 {
1250         struct em28xx_fh   *fh  = priv;
1251         struct em28xx      *dev = fh->dev;
1252
1253         *i = dev->ctl_input;
1254
1255         return 0;
1256 }
1257
1258 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1259 {
1260         struct em28xx_fh   *fh  = priv;
1261         struct em28xx      *dev = fh->dev;
1262         int                rc;
1263
1264         rc = check_dev(dev);
1265         if (rc < 0)
1266                 return rc;
1267
1268         if (i >= MAX_EM28XX_INPUT)
1269                 return -EINVAL;
1270         if (0 == INPUT(i)->type)
1271                 return -EINVAL;
1272
1273         dev->ctl_input = i;
1274
1275         mutex_lock(&dev->lock);
1276         video_mux(dev, dev->ctl_input);
1277         mutex_unlock(&dev->lock);
1278         return 0;
1279 }
1280
1281 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1282 {
1283         struct em28xx_fh   *fh    = priv;
1284         struct em28xx      *dev   = fh->dev;
1285
1286         if (!dev->audio_mode.has_audio)
1287                 return -EINVAL;
1288
1289         switch (a->index) {
1290         case EM28XX_AMUX_VIDEO:
1291                 strcpy(a->name, "Television");
1292                 break;
1293         case EM28XX_AMUX_LINE_IN:
1294                 strcpy(a->name, "Line In");
1295                 break;
1296         case EM28XX_AMUX_VIDEO2:
1297                 strcpy(a->name, "Television alt");
1298                 break;
1299         case EM28XX_AMUX_PHONE:
1300                 strcpy(a->name, "Phone");
1301                 break;
1302         case EM28XX_AMUX_MIC:
1303                 strcpy(a->name, "Mic");
1304                 break;
1305         case EM28XX_AMUX_CD:
1306                 strcpy(a->name, "CD");
1307                 break;
1308         case EM28XX_AMUX_AUX:
1309                 strcpy(a->name, "Aux");
1310                 break;
1311         case EM28XX_AMUX_PCM_OUT:
1312                 strcpy(a->name, "PCM");
1313                 break;
1314         default:
1315                 return -EINVAL;
1316         }
1317
1318         a->index = dev->ctl_ainput;
1319         a->capability = V4L2_AUDCAP_STEREO;
1320
1321         return 0;
1322 }
1323
1324 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1325 {
1326         struct em28xx_fh   *fh  = priv;
1327         struct em28xx      *dev = fh->dev;
1328
1329
1330         if (!dev->audio_mode.has_audio)
1331                 return -EINVAL;
1332
1333         if (a->index >= MAX_EM28XX_INPUT)
1334                 return -EINVAL;
1335         if (0 == INPUT(a->index)->type)
1336                 return -EINVAL;
1337
1338         mutex_lock(&dev->lock);
1339
1340         dev->ctl_ainput = INPUT(a->index)->amux;
1341         dev->ctl_aoutput = INPUT(a->index)->aout;
1342
1343         if (!dev->ctl_aoutput)
1344                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1345
1346         mutex_unlock(&dev->lock);
1347         return 0;
1348 }
1349
1350 static int vidioc_queryctrl(struct file *file, void *priv,
1351                                 struct v4l2_queryctrl *qc)
1352 {
1353         struct em28xx_fh      *fh  = priv;
1354         struct em28xx         *dev = fh->dev;
1355         int                   id  = qc->id;
1356         int                   rc;
1357
1358         rc = check_dev(dev);
1359         if (rc < 0)
1360                 return rc;
1361
1362         memset(qc, 0, sizeof(*qc));
1363
1364         qc->id = id;
1365
1366         /* enumberate AC97 controls */
1367         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1368                 rc = ac97_queryctrl(qc);
1369                 if (!rc)
1370                         return 0;
1371         }
1372
1373         /* enumberate V4L2 device controls */
1374         mutex_lock(&dev->lock);
1375         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1376         mutex_unlock(&dev->lock);
1377
1378         if (qc->type)
1379                 return 0;
1380         else
1381                 return -EINVAL;
1382 }
1383
1384 static int vidioc_g_ctrl(struct file *file, void *priv,
1385                                 struct v4l2_control *ctrl)
1386 {
1387         struct em28xx_fh      *fh  = priv;
1388         struct em28xx         *dev = fh->dev;
1389         int                   rc;
1390
1391         rc = check_dev(dev);
1392         if (rc < 0)
1393                 return rc;
1394         rc = 0;
1395
1396         mutex_lock(&dev->lock);
1397
1398         /* Set an AC97 control */
1399         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1400                 rc = ac97_get_ctrl(dev, ctrl);
1401         else
1402                 rc = 1;
1403
1404         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1405         if (rc == 1) {
1406                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1407                 rc = 0;
1408         }
1409
1410         mutex_unlock(&dev->lock);
1411         return rc;
1412 }
1413
1414 static int vidioc_s_ctrl(struct file *file, void *priv,
1415                                 struct v4l2_control *ctrl)
1416 {
1417         struct em28xx_fh      *fh  = priv;
1418         struct em28xx         *dev = fh->dev;
1419         int                   rc;
1420
1421         rc = check_dev(dev);
1422         if (rc < 0)
1423                 return rc;
1424
1425         mutex_lock(&dev->lock);
1426
1427         /* Set an AC97 control */
1428         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1429                 rc = ac97_set_ctrl(dev, ctrl);
1430         else
1431                 rc = 1;
1432
1433         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1434         if (rc == 1) {
1435                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1436
1437                 /*
1438                  * In the case of non-AC97 volume controls, we still need
1439                  * to do some setups at em28xx, in order to mute/unmute
1440                  * and to adjust audio volume. However, the value ranges
1441                  * should be checked by the corresponding V4L subdriver.
1442                  */
1443                 switch (ctrl->id) {
1444                 case V4L2_CID_AUDIO_MUTE:
1445                         dev->mute = ctrl->value;
1446                         rc = em28xx_audio_analog_set(dev);
1447                         break;
1448                 case V4L2_CID_AUDIO_VOLUME:
1449                         dev->volume = ctrl->value;
1450                         rc = em28xx_audio_analog_set(dev);
1451                 }
1452         }
1453
1454         mutex_unlock(&dev->lock);
1455         return rc;
1456 }
1457
1458 static int vidioc_g_tuner(struct file *file, void *priv,
1459                                 struct v4l2_tuner *t)
1460 {
1461         struct em28xx_fh      *fh  = priv;
1462         struct em28xx         *dev = fh->dev;
1463         int                   rc;
1464
1465         rc = check_dev(dev);
1466         if (rc < 0)
1467                 return rc;
1468
1469         if (0 != t->index)
1470                 return -EINVAL;
1471
1472         strcpy(t->name, "Tuner");
1473
1474         mutex_lock(&dev->lock);
1475         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1476         mutex_unlock(&dev->lock);
1477
1478         return 0;
1479 }
1480
1481 static int vidioc_s_tuner(struct file *file, void *priv,
1482                                 struct v4l2_tuner *t)
1483 {
1484         struct em28xx_fh      *fh  = priv;
1485         struct em28xx         *dev = fh->dev;
1486         int                   rc;
1487
1488         rc = check_dev(dev);
1489         if (rc < 0)
1490                 return rc;
1491
1492         if (0 != t->index)
1493                 return -EINVAL;
1494
1495         mutex_lock(&dev->lock);
1496         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1497         mutex_unlock(&dev->lock);
1498
1499         return 0;
1500 }
1501
1502 static int vidioc_g_frequency(struct file *file, void *priv,
1503                                 struct v4l2_frequency *f)
1504 {
1505         struct em28xx_fh      *fh  = priv;
1506         struct em28xx         *dev = fh->dev;
1507
1508         mutex_lock(&dev->lock);
1509         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1510         f->frequency = dev->ctl_freq;
1511         mutex_unlock(&dev->lock);
1512
1513         return 0;
1514 }
1515
1516 static int vidioc_s_frequency(struct file *file, void *priv,
1517                                 struct v4l2_frequency *f)
1518 {
1519         struct em28xx_fh      *fh  = priv;
1520         struct em28xx         *dev = fh->dev;
1521         int                   rc;
1522
1523         rc = check_dev(dev);
1524         if (rc < 0)
1525                 return rc;
1526
1527         if (0 != f->tuner)
1528                 return -EINVAL;
1529
1530         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1531                 return -EINVAL;
1532         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1533                 return -EINVAL;
1534
1535         mutex_lock(&dev->lock);
1536
1537         dev->ctl_freq = f->frequency;
1538         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1539
1540         mutex_unlock(&dev->lock);
1541
1542         return 0;
1543 }
1544
1545 #ifdef CONFIG_VIDEO_ADV_DEBUG
1546 static int em28xx_reg_len(int reg)
1547 {
1548         switch (reg) {
1549         case EM28XX_R40_AC97LSB:
1550         case EM28XX_R30_HSCALELOW:
1551         case EM28XX_R32_VSCALELOW:
1552                 return 2;
1553         default:
1554                 return 1;
1555         }
1556 }
1557
1558 static int vidioc_g_chip_ident(struct file *file, void *priv,
1559                struct v4l2_dbg_chip_ident *chip)
1560 {
1561         struct em28xx_fh      *fh  = priv;
1562         struct em28xx         *dev = fh->dev;
1563
1564         chip->ident = V4L2_IDENT_NONE;
1565         chip->revision = 0;
1566
1567         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1568
1569         return 0;
1570 }
1571
1572
1573 static int vidioc_g_register(struct file *file, void *priv,
1574                              struct v4l2_dbg_register *reg)
1575 {
1576         struct em28xx_fh      *fh  = priv;
1577         struct em28xx         *dev = fh->dev;
1578         int ret;
1579
1580         switch (reg->match.type) {
1581         case V4L2_CHIP_MATCH_AC97:
1582                 mutex_lock(&dev->lock);
1583                 ret = em28xx_read_ac97(dev, reg->reg);
1584                 mutex_unlock(&dev->lock);
1585                 if (ret < 0)
1586                         return ret;
1587
1588                 reg->val = ret;
1589                 reg->size = 1;
1590                 return 0;
1591         case V4L2_CHIP_MATCH_I2C_DRIVER:
1592                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1593                 return 0;
1594         case V4L2_CHIP_MATCH_I2C_ADDR:
1595                 /* TODO: is this correct? */
1596                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1597                 return 0;
1598         default:
1599                 if (!v4l2_chip_match_host(&reg->match))
1600                         return -EINVAL;
1601         }
1602
1603         /* Match host */
1604         reg->size = em28xx_reg_len(reg->reg);
1605         if (reg->size == 1) {
1606                 mutex_lock(&dev->lock);
1607                 ret = em28xx_read_reg(dev, reg->reg);
1608                 mutex_unlock(&dev->lock);
1609
1610                 if (ret < 0)
1611                         return ret;
1612
1613                 reg->val = ret;
1614         } else {
1615                 __le16 val = 0;
1616                 mutex_lock(&dev->lock);
1617                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1618                                                    reg->reg, (char *)&val, 2);
1619                 mutex_unlock(&dev->lock);
1620                 if (ret < 0)
1621                         return ret;
1622
1623                 reg->val = le16_to_cpu(val);
1624         }
1625
1626         return 0;
1627 }
1628
1629 static int vidioc_s_register(struct file *file, void *priv,
1630                              struct v4l2_dbg_register *reg)
1631 {
1632         struct em28xx_fh      *fh  = priv;
1633         struct em28xx         *dev = fh->dev;
1634         __le16 buf;
1635         int    rc;
1636
1637         switch (reg->match.type) {
1638         case V4L2_CHIP_MATCH_AC97:
1639                 mutex_lock(&dev->lock);
1640                 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1641                 mutex_unlock(&dev->lock);
1642
1643                 return rc;
1644         case V4L2_CHIP_MATCH_I2C_DRIVER:
1645                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1646                 return 0;
1647         case V4L2_CHIP_MATCH_I2C_ADDR:
1648                 /* TODO: is this correct? */
1649                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1650                 return 0;
1651         default:
1652                 if (!v4l2_chip_match_host(&reg->match))
1653                         return -EINVAL;
1654         }
1655
1656         /* Match host */
1657         buf = cpu_to_le16(reg->val);
1658
1659         mutex_lock(&dev->lock);
1660         rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1661                                em28xx_reg_len(reg->reg));
1662         mutex_unlock(&dev->lock);
1663
1664         return rc;
1665 }
1666 #endif
1667
1668
1669 static int vidioc_cropcap(struct file *file, void *priv,
1670                                         struct v4l2_cropcap *cc)
1671 {
1672         struct em28xx_fh      *fh  = priv;
1673         struct em28xx         *dev = fh->dev;
1674
1675         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1676                 return -EINVAL;
1677
1678         cc->bounds.left = 0;
1679         cc->bounds.top = 0;
1680         cc->bounds.width = dev->width;
1681         cc->bounds.height = dev->height;
1682         cc->defrect = cc->bounds;
1683         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1684         cc->pixelaspect.denominator = 59;
1685
1686         return 0;
1687 }
1688
1689 static int vidioc_streamon(struct file *file, void *priv,
1690                                         enum v4l2_buf_type type)
1691 {
1692         struct em28xx_fh      *fh  = priv;
1693         struct em28xx         *dev = fh->dev;
1694         int                   rc = -EINVAL;
1695
1696         rc = check_dev(dev);
1697         if (rc < 0)
1698                 return rc;
1699
1700         if (unlikely(type != fh->type))
1701                 return -EINVAL;
1702
1703         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1704                         fh, type, fh->resources, dev->resources);
1705
1706         if (unlikely(!res_get(fh,get_ressource(fh))))
1707                 return -EBUSY;
1708
1709         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1710                 rc = videobuf_streamon(&fh->vb_vidq);
1711         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1712                 rc = videobuf_streamon(&fh->vb_vbiq);
1713
1714         return rc;
1715 }
1716
1717 static int vidioc_streamoff(struct file *file, void *priv,
1718                                         enum v4l2_buf_type type)
1719 {
1720         struct em28xx_fh      *fh  = priv;
1721         struct em28xx         *dev = fh->dev;
1722         int                   rc;
1723
1724         rc = check_dev(dev);
1725         if (rc < 0)
1726                 return rc;
1727
1728         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1729             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1730                 return -EINVAL;
1731         if (type != fh->type)
1732                 return -EINVAL;
1733
1734         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1735                         fh, type, fh->resources, dev->resources);
1736
1737         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1738                 videobuf_streamoff(&fh->vb_vidq);
1739                 res_free(fh, EM28XX_RESOURCE_VIDEO);
1740         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1741                 videobuf_streamoff(&fh->vb_vbiq);
1742                 res_free(fh, EM28XX_RESOURCE_VBI);
1743         }
1744
1745         return 0;
1746 }
1747
1748 static int vidioc_querycap(struct file *file, void  *priv,
1749                                         struct v4l2_capability *cap)
1750 {
1751         struct em28xx_fh      *fh  = priv;
1752         struct em28xx         *dev = fh->dev;
1753
1754         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1755         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1756         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1757
1758         cap->version = EM28XX_VERSION_CODE;
1759
1760         cap->capabilities =
1761                         V4L2_CAP_VBI_CAPTURE |
1762                         V4L2_CAP_SLICED_VBI_CAPTURE |
1763                         V4L2_CAP_VIDEO_CAPTURE |
1764                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1765
1766         if (dev->audio_mode.has_audio)
1767                 cap->capabilities |= V4L2_CAP_AUDIO;
1768
1769         if (dev->tuner_type != TUNER_ABSENT)
1770                 cap->capabilities |= V4L2_CAP_TUNER;
1771
1772         return 0;
1773 }
1774
1775 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1776                                         struct v4l2_fmtdesc *f)
1777 {
1778         if (unlikely(f->index >= ARRAY_SIZE(format)))
1779                 return -EINVAL;
1780
1781         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1782         f->pixelformat = format[f->index].fourcc;
1783
1784         return 0;
1785 }
1786
1787 /* Sliced VBI ioctls */
1788 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1789                                         struct v4l2_format *f)
1790 {
1791         struct em28xx_fh      *fh  = priv;
1792         struct em28xx         *dev = fh->dev;
1793         int                   rc;
1794
1795         rc = check_dev(dev);
1796         if (rc < 0)
1797                 return rc;
1798
1799         mutex_lock(&dev->lock);
1800
1801         f->fmt.sliced.service_set = 0;
1802         v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1803
1804         if (f->fmt.sliced.service_set == 0)
1805                 rc = -EINVAL;
1806
1807         mutex_unlock(&dev->lock);
1808
1809         return rc;
1810 }
1811
1812 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1813                         struct v4l2_format *f)
1814 {
1815         struct em28xx_fh      *fh  = priv;
1816         struct em28xx         *dev = fh->dev;
1817         int                   rc;
1818
1819         rc = check_dev(dev);
1820         if (rc < 0)
1821                 return rc;
1822
1823         mutex_lock(&dev->lock);
1824         v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1825         mutex_unlock(&dev->lock);
1826
1827         if (f->fmt.sliced.service_set == 0)
1828                 return -EINVAL;
1829
1830         return 0;
1831 }
1832
1833 /* RAW VBI ioctls */
1834
1835 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1836                                 struct v4l2_format *format)
1837 {
1838         format->fmt.vbi.samples_per_line = 720;
1839         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1840         format->fmt.vbi.offset = 0;
1841         format->fmt.vbi.flags = 0;
1842
1843         /* Varies by video standard (NTSC, PAL, etc.) */
1844         /* FIXME: hard-coded for NTSC support */
1845         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; /* FIXME: ??? */
1846         format->fmt.vbi.count[0] = 12;
1847         format->fmt.vbi.count[1] = 12;
1848         format->fmt.vbi.start[0] = 10;
1849         format->fmt.vbi.start[1] = 273;
1850
1851         return 0;
1852 }
1853
1854 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1855                                 struct v4l2_format *format)
1856 {
1857         format->fmt.vbi.samples_per_line = 720;
1858         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1859         format->fmt.vbi.offset = 0;
1860         format->fmt.vbi.flags = 0;
1861
1862         /* Varies by video standard (NTSC, PAL, etc.) */
1863         /* FIXME: hard-coded for NTSC support */
1864         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; /* FIXME: ??? */
1865         format->fmt.vbi.count[0] = 12;
1866         format->fmt.vbi.count[1] = 12;
1867         format->fmt.vbi.start[0] = 10;
1868         format->fmt.vbi.start[1] = 273;
1869
1870         return 0;
1871 }
1872
1873 static int vidioc_reqbufs(struct file *file, void *priv,
1874                           struct v4l2_requestbuffers *rb)
1875 {
1876         struct em28xx_fh      *fh  = priv;
1877         struct em28xx         *dev = fh->dev;
1878         int                   rc;
1879
1880         rc = check_dev(dev);
1881         if (rc < 0)
1882                 return rc;
1883
1884         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1885                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1886         else
1887                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1888 }
1889
1890 static int vidioc_querybuf(struct file *file, void *priv,
1891                            struct v4l2_buffer *b)
1892 {
1893         struct em28xx_fh      *fh  = priv;
1894         struct em28xx         *dev = fh->dev;
1895         int                   rc;
1896
1897         rc = check_dev(dev);
1898         if (rc < 0)
1899                 return rc;
1900
1901         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1902                 return videobuf_querybuf(&fh->vb_vidq, b);
1903         else {
1904                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1905                    the videobuf framework, but we probably shouldn't be
1906                    returning a buffer larger than that which was asked for.
1907                    At a minimum, it causes a crash in zvbi since it does
1908                    a memcpy based on the source buffer length */
1909                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1910                 b->length = 17280;
1911                 return result;
1912         }
1913 }
1914
1915 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1916 {
1917         struct em28xx_fh      *fh  = priv;
1918         struct em28xx         *dev = fh->dev;
1919         int                   rc;
1920
1921         rc = check_dev(dev);
1922         if (rc < 0)
1923                 return rc;
1924
1925         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1926                 return videobuf_qbuf(&fh->vb_vidq, b);
1927         else {
1928                 return videobuf_qbuf(&fh->vb_vbiq, b);
1929         }
1930 }
1931
1932 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1933 {
1934         struct em28xx_fh      *fh  = priv;
1935         struct em28xx         *dev = fh->dev;
1936         int                   rc;
1937
1938         rc = check_dev(dev);
1939         if (rc < 0)
1940                 return rc;
1941
1942         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1943                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1944                                       O_NONBLOCK);
1945         else
1946                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1947                                       O_NONBLOCK);
1948 }
1949
1950 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1951 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1952 {
1953         struct em28xx_fh  *fh = priv;
1954
1955         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1956                 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1957         else
1958                 return videobuf_cgmbuf(&fh->vb_vbiq, mbuf, 8);
1959 }
1960 #endif
1961
1962
1963 /* ----------------------------------------------------------- */
1964 /* RADIO ESPECIFIC IOCTLS                                      */
1965 /* ----------------------------------------------------------- */
1966
1967 static int radio_querycap(struct file *file, void  *priv,
1968                           struct v4l2_capability *cap)
1969 {
1970         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1971
1972         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1973         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1974         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1975
1976         cap->version = EM28XX_VERSION_CODE;
1977         cap->capabilities = V4L2_CAP_TUNER;
1978         return 0;
1979 }
1980
1981 static int radio_g_tuner(struct file *file, void *priv,
1982                          struct v4l2_tuner *t)
1983 {
1984         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1985
1986         if (unlikely(t->index > 0))
1987                 return -EINVAL;
1988
1989         strcpy(t->name, "Radio");
1990         t->type = V4L2_TUNER_RADIO;
1991
1992         mutex_lock(&dev->lock);
1993         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1994         mutex_unlock(&dev->lock);
1995
1996         return 0;
1997 }
1998
1999 static int radio_enum_input(struct file *file, void *priv,
2000                             struct v4l2_input *i)
2001 {
2002         if (i->index != 0)
2003                 return -EINVAL;
2004         strcpy(i->name, "Radio");
2005         i->type = V4L2_INPUT_TYPE_TUNER;
2006
2007         return 0;
2008 }
2009
2010 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2011 {
2012         if (unlikely(a->index))
2013                 return -EINVAL;
2014
2015         strcpy(a->name, "Radio");
2016         return 0;
2017 }
2018
2019 static int radio_s_tuner(struct file *file, void *priv,
2020                          struct v4l2_tuner *t)
2021 {
2022         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2023
2024         if (0 != t->index)
2025                 return -EINVAL;
2026
2027         mutex_lock(&dev->lock);
2028         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2029         mutex_unlock(&dev->lock);
2030
2031         return 0;
2032 }
2033
2034 static int radio_s_audio(struct file *file, void *fh,
2035                          struct v4l2_audio *a)
2036 {
2037         return 0;
2038 }
2039
2040 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2041 {
2042         return 0;
2043 }
2044
2045 static int radio_queryctrl(struct file *file, void *priv,
2046                            struct v4l2_queryctrl *qc)
2047 {
2048         int i;
2049
2050         if (qc->id <  V4L2_CID_BASE ||
2051                 qc->id >= V4L2_CID_LASTP1)
2052                 return -EINVAL;
2053
2054         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2055                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2056                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2057                         return 0;
2058                 }
2059         }
2060
2061         return -EINVAL;
2062 }
2063
2064 /*
2065  * em28xx_v4l2_open()
2066  * inits the device and starts isoc transfer
2067  */
2068 static int em28xx_v4l2_open(struct file *filp)
2069 {
2070         int minor = video_devdata(filp)->minor;
2071         int errCode = 0, radio;
2072         struct em28xx *dev;
2073         enum v4l2_buf_type fh_type;
2074         struct em28xx_fh *fh;
2075         enum v4l2_field field;
2076
2077         dev = em28xx_get_device(minor, &fh_type, &radio);
2078
2079         if (NULL == dev)
2080                 return -ENODEV;
2081
2082         mutex_lock(&dev->lock);
2083
2084         em28xx_videodbg("open minor=%d type=%s users=%d\n",
2085                                 minor, v4l2_type_names[fh_type], dev->users);
2086
2087
2088         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2089         if (!fh) {
2090                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2091                 mutex_unlock(&dev->lock);
2092                 return -ENOMEM;
2093         }
2094         fh->dev = dev;
2095         fh->radio = radio;
2096         fh->type = fh_type;
2097         filp->private_data = fh;
2098
2099         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2100                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2101                 em28xx_set_alternate(dev);
2102                 em28xx_resolution_set(dev);
2103
2104                 /* Needed, since GPIO might have disabled power of
2105                    some i2c device
2106                  */
2107                 em28xx_wake_i2c(dev);
2108
2109         }
2110         if (fh->radio) {
2111                 em28xx_videodbg("video_open: setting radio device\n");
2112                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2113         }
2114
2115         dev->users++;
2116
2117         if (dev->progressive)
2118                 field = V4L2_FIELD_NONE;
2119         else
2120                 field = V4L2_FIELD_INTERLACED;
2121
2122         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2123                                     NULL, &dev->slock,
2124                                     V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2125                                     sizeof(struct em28xx_buffer), fh);
2126
2127         videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2128                                     NULL, &dev->slock,
2129                                     V4L2_BUF_TYPE_VBI_CAPTURE,
2130                                     V4L2_FIELD_SEQ_TB,
2131                                     sizeof(struct em28xx_buffer), fh);
2132
2133         mutex_unlock(&dev->lock);
2134
2135         return errCode;
2136 }
2137
2138 /*
2139  * em28xx_realease_resources()
2140  * unregisters the v4l2,i2c and usb devices
2141  * called when the device gets disconected or at module unload
2142 */
2143 void em28xx_release_analog_resources(struct em28xx *dev)
2144 {
2145
2146         /*FIXME: I2C IR should be disconnected */
2147
2148         if (dev->radio_dev) {
2149                 if (-1 != dev->radio_dev->minor)
2150                         video_unregister_device(dev->radio_dev);
2151                 else
2152                         video_device_release(dev->radio_dev);
2153                 dev->radio_dev = NULL;
2154         }
2155         if (dev->vbi_dev) {
2156                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
2157                             dev->vbi_dev->num);
2158                 if (-1 != dev->vbi_dev->minor)
2159                         video_unregister_device(dev->vbi_dev);
2160                 else
2161                         video_device_release(dev->vbi_dev);
2162                 dev->vbi_dev = NULL;
2163         }
2164         if (dev->vdev) {
2165                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
2166                             dev->vdev->num);
2167                 if (-1 != dev->vdev->minor)
2168                         video_unregister_device(dev->vdev);
2169                 else
2170                         video_device_release(dev->vdev);
2171                 dev->vdev = NULL;
2172         }
2173 }
2174
2175 /*
2176  * em28xx_v4l2_close()
2177  * stops streaming and deallocates all resources allocated by the v4l2
2178  * calls and ioctls
2179  */
2180 static int em28xx_v4l2_close(struct file *filp)
2181 {
2182         struct em28xx_fh *fh  = filp->private_data;
2183         struct em28xx    *dev = fh->dev;
2184         int              errCode;
2185
2186         em28xx_videodbg("users=%d\n", dev->users);
2187
2188         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2189                 videobuf_stop(&fh->vb_vidq);
2190                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2191         }
2192
2193         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2194                 videobuf_stop(&fh->vb_vbiq);
2195                 res_free(fh, EM28XX_RESOURCE_VBI);
2196         }
2197
2198         if(dev->users == 1) {
2199                 /* the device is already disconnect,
2200                    free the remaining resources */
2201                 if (dev->state & DEV_DISCONNECTED) {
2202                         em28xx_release_resources(dev);
2203                         kfree(dev);
2204                         return 0;
2205                 }
2206
2207                 /* Save some power by putting tuner to sleep */
2208                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
2209
2210                 /* do this before setting alternate! */
2211                 em28xx_uninit_isoc(dev);
2212                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2213
2214                 /* set alternate 0 */
2215                 dev->alt = 0;
2216                 em28xx_videodbg("setting alternate 0\n");
2217                 errCode = usb_set_interface(dev->udev, 0, 0);
2218                 if (errCode < 0) {
2219                         em28xx_errdev("cannot change alternate number to "
2220                                         "0 (error=%i)\n", errCode);
2221                 }
2222         }
2223
2224         videobuf_mmap_free(&fh->vb_vidq);
2225         videobuf_mmap_free(&fh->vb_vbiq);
2226         kfree(fh);
2227         dev->users--;
2228         wake_up_interruptible_nr(&dev->open, 1);
2229         return 0;
2230 }
2231
2232 /*
2233  * em28xx_v4l2_read()
2234  * will allocate buffers when called for the first time
2235  */
2236 static ssize_t
2237 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2238                  loff_t *pos)
2239 {
2240         struct em28xx_fh *fh = filp->private_data;
2241         struct em28xx *dev = fh->dev;
2242         int rc;
2243
2244         rc = check_dev(dev);
2245         if (rc < 0)
2246                 return rc;
2247
2248         /* FIXME: read() is not prepared to allow changing the video
2249            resolution while streaming. Seems a bug at em28xx_set_fmt
2250          */
2251
2252         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2253                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2254                         return -EBUSY;
2255
2256                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2257                                         filp->f_flags & O_NONBLOCK);
2258         }
2259
2260
2261         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2262                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2263                         return -EBUSY;
2264
2265                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2266                                         filp->f_flags & O_NONBLOCK);
2267         }
2268
2269         return 0;
2270 }
2271
2272 /*
2273  * em28xx_v4l2_poll()
2274  * will allocate buffers when called for the first time
2275  */
2276 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2277 {
2278         struct em28xx_fh *fh = filp->private_data;
2279         struct em28xx *dev = fh->dev;
2280         int rc;
2281
2282         rc = check_dev(dev);
2283         if (rc < 0)
2284                 return rc;
2285
2286         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2287                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2288                         return POLLERR;
2289                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2290         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2291                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2292                         return POLLERR;
2293                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2294         } else {
2295                 return POLLERR;
2296         }
2297 }
2298
2299 /*
2300  * em28xx_v4l2_mmap()
2301  */
2302 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2303 {
2304         struct em28xx_fh *fh    = filp->private_data;
2305         struct em28xx    *dev   = fh->dev;
2306         int              rc;
2307
2308         rc = check_dev(dev);
2309         if (rc < 0)
2310                 return rc;
2311
2312         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2313                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2314         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2315                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2316
2317         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2318                 (unsigned long)vma->vm_start,
2319                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2320                 rc);
2321
2322         return rc;
2323 }
2324
2325 static const struct v4l2_file_operations em28xx_v4l_fops = {
2326         .owner         = THIS_MODULE,
2327         .open          = em28xx_v4l2_open,
2328         .release       = em28xx_v4l2_close,
2329         .read          = em28xx_v4l2_read,
2330         .poll          = em28xx_v4l2_poll,
2331         .mmap          = em28xx_v4l2_mmap,
2332         .ioctl         = video_ioctl2,
2333 };
2334
2335 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2336         .vidioc_querycap            = vidioc_querycap,
2337         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2338         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2339         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2340         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2341         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2342         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2343         .vidioc_g_audio             = vidioc_g_audio,
2344         .vidioc_s_audio             = vidioc_s_audio,
2345         .vidioc_cropcap             = vidioc_cropcap,
2346
2347         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2348         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2349         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2350
2351         .vidioc_reqbufs             = vidioc_reqbufs,
2352         .vidioc_querybuf            = vidioc_querybuf,
2353         .vidioc_qbuf                = vidioc_qbuf,
2354         .vidioc_dqbuf               = vidioc_dqbuf,
2355         .vidioc_s_std               = vidioc_s_std,
2356         .vidioc_g_parm              = vidioc_g_parm,
2357         .vidioc_s_parm              = vidioc_s_parm,
2358         .vidioc_enum_input          = vidioc_enum_input,
2359         .vidioc_g_input             = vidioc_g_input,
2360         .vidioc_s_input             = vidioc_s_input,
2361         .vidioc_queryctrl           = vidioc_queryctrl,
2362         .vidioc_g_ctrl              = vidioc_g_ctrl,
2363         .vidioc_s_ctrl              = vidioc_s_ctrl,
2364         .vidioc_streamon            = vidioc_streamon,
2365         .vidioc_streamoff           = vidioc_streamoff,
2366         .vidioc_g_tuner             = vidioc_g_tuner,
2367         .vidioc_s_tuner             = vidioc_s_tuner,
2368         .vidioc_g_frequency         = vidioc_g_frequency,
2369         .vidioc_s_frequency         = vidioc_s_frequency,
2370 #ifdef CONFIG_VIDEO_ADV_DEBUG
2371         .vidioc_g_register          = vidioc_g_register,
2372         .vidioc_s_register          = vidioc_s_register,
2373         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
2374 #endif
2375 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2376         .vidiocgmbuf                = vidiocgmbuf,
2377 #endif
2378 };
2379
2380 static const struct video_device em28xx_video_template = {
2381         .fops                       = &em28xx_v4l_fops,
2382         .release                    = video_device_release,
2383         .ioctl_ops                  = &video_ioctl_ops,
2384
2385         .minor                      = -1,
2386
2387         .tvnorms                    = V4L2_STD_ALL,
2388         /* FIXME: we need this to be NTSC for VBI to work - it should
2389            be moved to a per-board definition */
2390         .current_norm               = V4L2_STD_NTSC,
2391 };
2392
2393 static const struct v4l2_file_operations radio_fops = {
2394         .owner         = THIS_MODULE,
2395         .open          = em28xx_v4l2_open,
2396         .release       = em28xx_v4l2_close,
2397         .ioctl         = video_ioctl2,
2398 };
2399
2400 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2401         .vidioc_querycap      = radio_querycap,
2402         .vidioc_g_tuner       = radio_g_tuner,
2403         .vidioc_enum_input    = radio_enum_input,
2404         .vidioc_g_audio       = radio_g_audio,
2405         .vidioc_s_tuner       = radio_s_tuner,
2406         .vidioc_s_audio       = radio_s_audio,
2407         .vidioc_s_input       = radio_s_input,
2408         .vidioc_queryctrl     = radio_queryctrl,
2409         .vidioc_g_ctrl        = vidioc_g_ctrl,
2410         .vidioc_s_ctrl        = vidioc_s_ctrl,
2411         .vidioc_g_frequency   = vidioc_g_frequency,
2412         .vidioc_s_frequency   = vidioc_s_frequency,
2413 #ifdef CONFIG_VIDEO_ADV_DEBUG
2414         .vidioc_g_register    = vidioc_g_register,
2415         .vidioc_s_register    = vidioc_s_register,
2416 #endif
2417 };
2418
2419 static struct video_device em28xx_radio_template = {
2420         .name                 = "em28xx-radio",
2421         .fops                 = &radio_fops,
2422         .ioctl_ops            = &radio_ioctl_ops,
2423         .minor                = -1,
2424 };
2425
2426 /******************************** usb interface ******************************/
2427
2428
2429
2430 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2431                                         const struct video_device *template,
2432                                         const char *type_name)
2433 {
2434         struct video_device *vfd;
2435
2436         vfd = video_device_alloc();
2437         if (NULL == vfd)
2438                 return NULL;
2439
2440         *vfd            = *template;
2441         vfd->minor      = -1;
2442         vfd->v4l2_dev   = &dev->v4l2_dev;
2443         vfd->release    = video_device_release;
2444         vfd->debug      = video_debug;
2445
2446         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2447                  dev->name, type_name);
2448
2449         return vfd;
2450 }
2451
2452 int em28xx_register_analog_devices(struct em28xx *dev)
2453 {
2454       u8 val;
2455         int ret;
2456
2457         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
2458                 dev->name,
2459                 (EM28XX_VERSION_CODE >> 16) & 0xff,
2460                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2461
2462         /* set default norm */
2463         dev->norm = em28xx_video_template.current_norm;
2464         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2465         dev->ctl_input = 0;
2466
2467         /* Analog specific initialization */
2468         dev->format = &format[0];
2469         em28xx_set_video_format(dev, format[0].fourcc,
2470                                 norm_maxw(dev), norm_maxh(dev));
2471
2472         video_mux(dev, dev->ctl_input);
2473
2474         /* Audio defaults */
2475         dev->mute = 1;
2476         dev->volume = 0x1f;
2477
2478         /* enable vbi capturing */
2479
2480 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2481         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2482         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2483                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2484         em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x51);
2485
2486         em28xx_set_outfmt(dev);
2487         em28xx_colorlevels_set_default(dev);
2488         em28xx_compression_disable(dev);
2489
2490         /* allocate and fill video video_device struct */
2491         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2492         if (!dev->vdev) {
2493                 em28xx_errdev("cannot allocate video_device.\n");
2494                 return -ENODEV;
2495         }
2496
2497         /* register v4l2 video video_device */
2498         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2499                                        video_nr[dev->devno]);
2500         if (ret) {
2501                 em28xx_errdev("unable to register video device (error=%i).\n",
2502                               ret);
2503                 return ret;
2504         }
2505
2506         /* Allocate and fill vbi video_device struct */
2507         if (em28xx_vbi_supported(dev) == 1) {
2508                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2509                                                 "vbi");
2510
2511                 /* register v4l2 vbi video_device */
2512                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2513                                             vbi_nr[dev->devno]);
2514                 if (ret < 0) {
2515                         em28xx_errdev("unable to register vbi device\n");
2516                         return ret;
2517                 }
2518         }
2519
2520         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2521                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2522                                                   "radio");
2523                 if (!dev->radio_dev) {
2524                         em28xx_errdev("cannot allocate video_device.\n");
2525                         return -ENODEV;
2526                 }
2527                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2528                                             radio_nr[dev->devno]);
2529                 if (ret < 0) {
2530                         em28xx_errdev("can't register radio device\n");
2531                         return ret;
2532                 }
2533                 em28xx_info("Registered radio device as /dev/radio%d\n",
2534                             dev->radio_dev->num);
2535         }
2536
2537         em28xx_info("V4L2 video device registered as /dev/video%d\n",
2538                                 dev->vdev->num);
2539
2540         if (dev->vbi_dev)
2541                 em28xx_info("V4L2 VBI device registered as /dev/vbi%d\n",
2542                             dev->vbi_dev->num);
2543
2544         return 0;
2545 }