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"
 260                                        "(2)\n",
 261                                        ((char *)startwrite + lencopy) -
 262                                        ((char *)outp + buf->vb.size));
 263                         lencopy = remain = (char *)outp + buf->vb.size -
 264                                            (char *)startwrite;
 265                 }
 266                 if (lencopy <= 0)
 267                         break;
 268
 269                 memcpy(startwrite, startread, lencopy);
 270
 271                 remain -= lencopy;
 272         }
 273
 274         dma_q->pos += len;
 275 }
 276
 277 static void em28xx_copy_vbi(struct em28xx *dev,
 278                               struct em28xx_dmaqueue  *dma_q,
 279                               struct em28xx_buffer *buf,
 280                               unsigned char *p,
 281                               unsigned char *outp, unsigned long len)
 282 {
 283         void *startwrite, *startread;
 284         int  offset;
 285         int bytesperline = 720;
 286
 287         if (dev == NULL) {
 288                 em28xx_isocdbg("dev is null\n");
 289                 return;
 290         }
 291
 292         if (dma_q == NULL) {
 293                 em28xx_isocdbg("dma_q is null\n");
 294                 return;
 295         }
 296         if (buf == NULL) {
 297                 return;
 298         }
 299         if (p == NULL) {
 300                 em28xx_isocdbg("p is null\n");
 301                 return;
 302         }
 303         if (outp == NULL) {
 304                 em28xx_isocdbg("outp is null\n");
 305                 return;
 306         }
 307
 308         if (dma_q->pos + len > buf->vb.size)
 309                 len = buf->vb.size - dma_q->pos;
 310
 311         if ((p[0] == 0x33 && p[1] == 0x95) ||
 312             (p[0] == 0x88 && p[1] == 0x88)) {
 313                 /* Header field, advance past it */
 314                 p += 4;
 315         } else {
 316                 len += 4;
 317         }
 318
 319         startread = p;
 320
 321         startwrite = outp + dma_q->pos;
 322         offset = dma_q->pos;
 323
 324         /* Make sure the bottom field populates the second half of the frame */
 325         if (buf->top_field == 0) {
 326                 startwrite += bytesperline * 0x0c;
 327                 offset += bytesperline * 0x0c;
 328         }
 329
 330         memcpy(startwrite, startread, len);
 331         dma_q->pos += len;
 332 }
 333
 334 static inline void print_err_status(struct em28xx *dev,
 335                                      int packet, int status)
 336 {
 337         char *errmsg = "Unknown";
 338
 339         switch (status) {
 340         case -ENOENT:
 341                 errmsg = "unlinked synchronuously";
 342                 break;
 343         case -ECONNRESET:
 344                 errmsg = "unlinked asynchronuously";
 345                 break;
 346         case -ENOSR:
 347                 errmsg = "Buffer error (overrun)";
 348                 break;
 349         case -EPIPE:
 350                 errmsg = "Stalled (device not responding)";
 351                 break;
 352         case -EOVERFLOW:
 353                 errmsg = "Babble (bad cable?)";
 354                 break;
 355         case -EPROTO:
 356                 errmsg = "Bit-stuff error (bad cable?)";
 357                 break;
 358         case -EILSEQ:
 359                 errmsg = "CRC/Timeout (could be anything)";
 360                 break;
 361         case -ETIME:
 362                 errmsg = "Device does not respond";
 363                 break;
 364         }
 365         if (packet < 0) {
 366                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 367         } else {
 368                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 369                                packet, status, errmsg);
 370         }
 371 }
 372
 373 /*
 374  * video-buf generic routine to get the next available buffer
 375  */
 376 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 377                                           struct em28xx_buffer **buf)
 378 {
 379         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 380         char *outp;
 381
 382         if (list_empty(&dma_q->active)) {
 383                 em28xx_isocdbg("No active queue to serve\n");
 384                 dev->isoc_ctl.vid_buf = NULL;
 385                 *buf = NULL;
 386                 return;
 387         }
 388
 389         /* Get the next buffer */
 390         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 391
 392         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 393         outp = videobuf_to_vmalloc(&(*buf)->vb);
 394         memset(outp, 0, (*buf)->vb.size);
 395
 396         dev->isoc_ctl.vid_buf = *buf;
 397
 398         return;
 399 }
 400
 401 /*
 402  * video-buf generic routine to get the next available VBI buffer
 403  */
 404 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 405                                     struct em28xx_buffer **buf)
 406 {
 407         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 408         char *outp;
 409
 410         if (list_empty(&dma_q->active)) {
 411                 em28xx_isocdbg("No active queue to serve\n");
 412                 dev->isoc_ctl.vbi_buf = NULL;
 413                 *buf = NULL;
 414                 return;
 415         }
 416
 417         /* Get the next buffer */
 418         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 419         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 420         outp = videobuf_to_vmalloc(&(*buf)->vb);
 421         memset(outp, 0x00, (*buf)->vb.size);
 422
 423         dev->isoc_ctl.vbi_buf = *buf;
 424
 425         return;
 426 }
 427
 428 /*
 429  * Controls the isoc copy of each urb packet
 430  */
 431 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 432 {
 433         struct em28xx_buffer    *buf;
 434         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 435         unsigned char *outp = NULL;
 436         int i, len = 0, rc = 1;
 437         unsigned char *p;
 438
 439         if (!dev)
 440                 return 0;
 441
 442         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 443                 return 0;
 444
 445         if (urb->status < 0) {
 446                 print_err_status(dev, -1, urb->status);
 447                 if (urb->status == -ENOENT)
 448                         return 0;
 449         }
 450
 451         buf = dev->isoc_ctl.vid_buf;
 452         if (buf != NULL)
 453                 outp = videobuf_to_vmalloc(&buf->vb);
 454
 455         for (i = 0; i < urb->number_of_packets; i++) {
 456                 int status = urb->iso_frame_desc[i].status;
 457
 458                 if (status < 0) {
 459                         print_err_status(dev, i, status);
 460                         if (urb->iso_frame_desc[i].status != -EPROTO)
 461                                 continue;
 462                 }
 463
 464                 len = urb->iso_frame_desc[i].actual_length - 4;
 465
 466                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 467                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 468                         continue;
 469                 }
 470                 if (urb->iso_frame_desc[i].actual_length >
 471                                                 dev->max_pkt_size) {
 472                         em28xx_isocdbg("packet bigger than packet size");
 473                         continue;
 474                 }
 475
 476                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 477
 478                 /* FIXME: incomplete buffer checks where removed to make
 479                    logic simpler. Impacts of those changes should be evaluated
 480                  */
 481                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 482                         em28xx_isocdbg("VBI HEADER!!!\n");
 483                         /* FIXME: Should add vbi copy */
 484                         continue;
 485                 }
 486                 if (p[0] == 0x22 && p[1] == 0x5a) {
 487                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 488                                        len, (p[2] & 1) ? "odd" : "even");
 489
 490                         if (dev->progressive || !(p[2] & 1)) {
 491                                 if (buf != NULL)
 492                                         buffer_filled(dev, dma_q, buf);
 493                                 get_next_buf(dma_q, &buf);
 494                                 if (buf == NULL)
 495                                         outp = NULL;
 496                                 else
 497                                         outp = videobuf_to_vmalloc(&buf->vb);
 498                         }
 499
 500                         if (buf != NULL) {
 501                                 if (p[2] & 1)
 502                                         buf->top_field = 0;
 503                                 else
 504                                         buf->top_field = 1;
 505                         }
 506
 507                         dma_q->pos = 0;
 508                 }
 509                 if (buf != NULL)
 510                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 511         }
 512         return rc;
 513 }
 514
 515 /* Version of isoc handler that takes into account a mixture of video and
 516    VBI data */
 517 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 518 {
 519         struct em28xx_buffer    *buf, *vbi_buf;
 520         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 521         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 522         unsigned char *outp = NULL;
 523         unsigned char *vbioutp = NULL;
 524         int i, len = 0, rc = 1;
 525         unsigned char *p;
 526         int vbi_size;
 527
 528         if (!dev)
 529                 return 0;
 530
 531         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 532                 return 0;
 533
 534         if (urb->status < 0) {
 535                 print_err_status(dev, -1, urb->status);
 536                 if (urb->status == -ENOENT)
 537                         return 0;
 538         }
 539
 540         buf = dev->isoc_ctl.vid_buf;
 541         if (buf != NULL)
 542                 outp = videobuf_to_vmalloc(&buf->vb);
 543
 544         vbi_buf = dev->isoc_ctl.vbi_buf;
 545         if (vbi_buf != NULL)
 546                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 547
 548         for (i = 0; i < urb->number_of_packets; i++) {
 549                 int status = urb->iso_frame_desc[i].status;
 550
 551                 if (status < 0) {
 552                         print_err_status(dev, i, status);
 553                         if (urb->iso_frame_desc[i].status != -EPROTO)
 554                                 continue;
 555                 }
 556
 557                 len = urb->iso_frame_desc[i].actual_length - 4;
 558
 559                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 560                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 561                         continue;
 562                 }
 563                 if (urb->iso_frame_desc[i].actual_length >
 564                                                 dev->max_pkt_size) {
 565                         em28xx_isocdbg("packet bigger than packet size");
 566                         continue;
 567                 }
 568
 569                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 570
 571                 /* capture type 0 = vbi start
 572                    capture type 1 = video start
 573                    capture type 2 = video in progress */
 574                 if (p[0] == 0x33 && p[1] == 0x95) {
 575                         dev->capture_type = 0;
 576                         dev->vbi_read = 0;
 577                         em28xx_isocdbg("VBI START HEADER!!!\n");
 578                         dev->cur_field = p[2];
 579                 }
 580
 581                 /* FIXME: get rid of hard-coded value */
 582                 vbi_size = 720 * 0x0c;
 583
 584                 if (dev->capture_type == 0) {
 585                         if (dev->vbi_read >= vbi_size) {
 586                                 /* We've already read all the VBI data, so
 587                                    treat the rest as video */
 588                                 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
 589                         } else if ((dev->vbi_read + len) < vbi_size) {
 590                                 /* This entire frame is VBI data */
 591                                 if (dev->vbi_read == 0 &&
 592                                     (!(dev->cur_field & 1))) {
 593                                         /* Brand new frame */
 594                                         if (vbi_buf != NULL)
 595                                                 vbi_buffer_filled(dev,
 596                                                                   vbi_dma_q,
 597                                                                   vbi_buf);
 598                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 599                                         if (vbi_buf == NULL)
 600                                                 vbioutp = NULL;
 601                                         else
 602                                                 vbioutp = videobuf_to_vmalloc(
 603                                                         &vbi_buf->vb);
 604                                 }
 605
 606                                 if (dev->vbi_read == 0) {
 607                                         vbi_dma_q->pos = 0;
 608                                         if (vbi_buf != NULL) {
 609                                                 if (dev->cur_field & 1)
 610                                                         vbi_buf->top_field = 0;
 611                                                 else
 612                                                         vbi_buf->top_field = 1;
 613                                         }
 614                                 }
 615
 616                                 dev->vbi_read += len;
 617                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 618                                                 vbioutp, len);
 619                         } else {
 620                                 /* Some of this frame is VBI data and some is
 621                                    video data */
 622                                 int vbi_data_len = vbi_size - dev->vbi_read;
 623                                 dev->vbi_read += vbi_data_len;
 624                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 625                                                 vbioutp, vbi_data_len);
 626                                 dev->capture_type = 1;
 627                                 p += vbi_data_len;
 628                                 len -= vbi_data_len;
 629                         }
 630                 }
 631
 632                 if (dev->capture_type == 1) {
 633                         dev->capture_type = 2;
 634                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 635                                        len, (p[2] & 1) ? "odd" : "even");
 636
 637                         if (dev->progressive || !(dev->cur_field & 1)) {
 638                                 if (buf != NULL)
 639                                         buffer_filled(dev, dma_q, buf);
 640                                 get_next_buf(dma_q, &buf);
 641                                 if (buf == NULL)
 642                                         outp = NULL;
 643                                 else
 644                                         outp = videobuf_to_vmalloc(&buf->vb);
 645                         }
 646                         if (buf != NULL) {
 647                                 if (dev->cur_field & 1)
 648                                         buf->top_field = 0;
 649                                 else
 650                                         buf->top_field = 1;
 651                         }
 652
 653                         dma_q->pos = 0;
 654                 }
 655                 if (buf != NULL && dev->capture_type == 2)
 656                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 657         }
 658         return rc;
 659 }
 660
 661
 662 /* ------------------------------------------------------------------
 663         Videobuf operations
 664    ------------------------------------------------------------------*/
 665
 666 static int
 667 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 668 {
 669         struct em28xx_fh *fh = vq->priv_data;
 670         struct em28xx        *dev = fh->dev;
 671         struct v4l2_frequency f;
 672
 673         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
 674                 >> 3;
 675
 676         if (0 == *count)
 677                 *count = EM28XX_DEF_BUF;
 678
 679         if (*count < EM28XX_MIN_BUF)
 680                 *count = EM28XX_MIN_BUF;
 681
 682         /* Ask tuner to go to analog or radio mode */
 683         memset(&f, 0, sizeof(f));
 684         f.frequency = dev->ctl_freq;
 685         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 686
 687         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 688
 689         return 0;
 690 }
 691
 692 /* This is called *without* dev->slock held; please keep it that way */
 693 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 694 {
 695         struct em28xx_fh     *fh  = vq->priv_data;
 696         struct em28xx        *dev = fh->dev;
 697         unsigned long flags = 0;
 698         if (in_interrupt())
 699                 BUG();
 700
 701         /* We used to wait for the buffer to finish here, but this didn't work
 702            because, as we were keeping the state as VIDEOBUF_QUEUED,
 703            videobuf_queue_cancel marked it as finished for us.
 704            (Also, it could wedge forever if the hardware was misconfigured.)
 705
 706            This should be safe; by the time we get here, the buffer isn't
 707            queued anymore. If we ever start marking the buffers as
 708            VIDEOBUF_ACTIVE, it won't be, though.
 709         */
 710         spin_lock_irqsave(&dev->slock, flags);
 711         if (dev->isoc_ctl.vid_buf == buf)
 712                 dev->isoc_ctl.vid_buf = NULL;
 713         spin_unlock_irqrestore(&dev->slock, flags);
 714
 715         videobuf_vmalloc_free(&buf->vb);
 716         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 717 }
 718
 719 static int
 720 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 721                                                 enum v4l2_field field)
 722 {
 723         struct em28xx_fh     *fh  = vq->priv_data;
 724         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 725         struct em28xx        *dev = fh->dev;
 726         int                  rc = 0, urb_init = 0;
 727
 728         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
 729                         + 7) >> 3;
 730
 731         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 732                 return -EINVAL;
 733
 734         buf->vb.width  = dev->width;
 735         buf->vb.height = dev->height;
 736         buf->vb.field  = field;
 737
 738         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 739                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 740                 if (rc < 0)
 741                         goto fail;
 742         }
 743
 744         if (!dev->isoc_ctl.num_bufs)
 745                 urb_init = 1;
 746
 747         if (urb_init) {
 748                 if (em28xx_vbi_supported(dev) == 1)
 749                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 750                                               EM28XX_NUM_BUFS,
 751                                               dev->max_pkt_size,
 752                                               em28xx_isoc_copy_vbi);
 753                 else
 754                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 755                                               EM28XX_NUM_BUFS,
 756                                               dev->max_pkt_size,
 757                                               em28xx_isoc_copy);
 758                 if (rc < 0)
 759                         goto fail;
 760         }
 761
 762         buf->vb.state = VIDEOBUF_PREPARED;
 763         return 0;
 764
 765 fail:
 766         free_buffer(vq, buf);
 767         return rc;
 768 }
 769
 770 static void
 771 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 772 {
 773         struct em28xx_buffer    *buf     = container_of(vb,
 774                                                         struct em28xx_buffer,
 775                                                         vb);
 776         struct em28xx_fh        *fh      = vq->priv_data;
 777         struct em28xx           *dev     = fh->dev;
 778         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 779
 780         buf->vb.state = VIDEOBUF_QUEUED;
 781         list_add_tail(&buf->vb.queue, &vidq->active);
 782
 783 }
 784
 785 static void buffer_release(struct videobuf_queue *vq,
 786                                 struct videobuf_buffer *vb)
 787 {
 788         struct em28xx_buffer   *buf  = container_of(vb,
 789                                                     struct em28xx_buffer,
 790                                                     vb);
 791         struct em28xx_fh       *fh   = vq->priv_data;
 792         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 793
 794         em28xx_isocdbg("em28xx: called buffer_release\n");
 795
 796         free_buffer(vq, buf);
 797 }
 798
 799 static struct videobuf_queue_ops em28xx_video_qops = {
 800         .buf_setup      = buffer_setup,
 801         .buf_prepare    = buffer_prepare,
 802         .buf_queue      = buffer_queue,
 803         .buf_release    = buffer_release,
 804 };
 805
 806 /*********************  v4l2 interface  **************************************/
 807
 808 static void video_mux(struct em28xx *dev, int index)
 809 {
 810         dev->ctl_input = index;
 811         dev->ctl_ainput = INPUT(index)->amux;
 812         dev->ctl_aoutput = INPUT(index)->aout;
 813
 814         if (!dev->ctl_aoutput)
 815                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 816
 817         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 818                         INPUT(index)->vmux, 0, 0);
 819
 820         if (dev->board.has_msp34xx) {
 821                 if (dev->i2s_speed) {
 822                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 823                                 s_i2s_clock_freq, dev->i2s_speed);
 824                 }
 825                 /* Note: this is msp3400 specific */
 826                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 827                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 828         }
 829
 830         if (dev->board.adecoder != EM28XX_NOADECODER) {
 831                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 832                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 833         }
 834
 835         em28xx_audio_analog_set(dev);
 836 }
 837
 838 /* Usage lock check functions */
 839 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 840 {
 841         struct em28xx    *dev = fh->dev;
 842
 843         if (fh->resources & bit)
 844                 /* have it already allocated */
 845                 return 1;
 846
 847         /* is it free? */
 848         mutex_lock(&dev->lock);
 849         if (dev->resources & bit) {
 850                 /* no, someone else uses it */
 851                 mutex_unlock(&dev->lock);
 852                 return 0;
 853         }
 854         /* it's free, grab it */
 855         fh->resources  |= bit;
 856         dev->resources |= bit;
 857         em28xx_videodbg("res: get %d\n", bit);
 858         mutex_unlock(&dev->lock);
 859         return 1;
 860 }
 861
 862 static int res_check(struct em28xx_fh *fh, unsigned int bit)
 863 {
 864         return fh->resources & bit;
 865 }
 866
 867 static int res_locked(struct em28xx *dev, unsigned int bit)
 868 {
 869         return dev->resources & bit;
 870 }
 871
 872 static void res_free(struct em28xx_fh *fh, unsigned int bits)
 873 {
 874         struct em28xx    *dev = fh->dev;
 875
 876         BUG_ON((fh->resources & bits) != bits);
 877
 878         mutex_lock(&dev->lock);
 879         fh->resources  &= ~bits;
 880         dev->resources &= ~bits;
 881         em28xx_videodbg("res: put %d\n", bits);
 882         mutex_unlock(&dev->lock);
 883 }
 884
 885 static int get_ressource(struct em28xx_fh *fh)
 886 {
 887         switch (fh->type) {
 888         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 889                 return EM28XX_RESOURCE_VIDEO;
 890         case V4L2_BUF_TYPE_VBI_CAPTURE:
 891                 return EM28XX_RESOURCE_VBI;
 892         default:
 893                 BUG();
 894                 return 0;
 895         }
 896 }
 897
 898 /*
 899  * ac97_queryctrl()
 900  * return the ac97 supported controls
 901  */
 902 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 903 {
 904         int i;
 905
 906         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 907                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 908                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 909                         return 0;
 910                 }
 911         }
 912
 913         /* Control is not ac97 related */
 914         return 1;
 915 }
 916
 917 /*
 918  * ac97_get_ctrl()
 919  * return the current values for ac97 mute and volume
 920  */
 921 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 922 {
 923         switch (ctrl->id) {
 924         case V4L2_CID_AUDIO_MUTE:
 925                 ctrl->value = dev->mute;
 926                 return 0;
 927         case V4L2_CID_AUDIO_VOLUME:
 928                 ctrl->value = dev->volume;
 929                 return 0;
 930         default:
 931                 /* Control is not ac97 related */
 932                 return 1;
 933         }
 934 }
 935
 936 /*
 937  * ac97_set_ctrl()
 938  * set values for ac97 mute and volume
 939  */
 940 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 941 {
 942         int i;
 943
 944         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 945                 if (ctrl->id == ac97_qctrl[i].id)
 946                         goto handle;
 947
 948         /* Announce that hasn't handle it */
 949         return 1;
 950
 951 handle:
 952         if (ctrl->value < ac97_qctrl[i].minimum ||
 953             ctrl->value > ac97_qctrl[i].maximum)
 954                 return -ERANGE;
 955
 956         switch (ctrl->id) {
 957         case V4L2_CID_AUDIO_MUTE:
 958                 dev->mute = ctrl->value;
 959                 break;
 960         case V4L2_CID_AUDIO_VOLUME:
 961                 dev->volume = ctrl->value;
 962                 break;
 963         }
 964
 965         return em28xx_audio_analog_set(dev);
 966 }
 967
 968 static int check_dev(struct em28xx *dev)
 969 {
 970         if (dev->state & DEV_DISCONNECTED) {
 971                 em28xx_errdev("v4l2 ioctl: device not present\n");
 972                 return -ENODEV;
 973         }
 974
 975         if (dev->state & DEV_MISCONFIGURED) {
 976                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 977                               "close and open it again\n");
 978                 return -EIO;
 979         }
 980         return 0;
 981 }
 982
 983 static void get_scale(struct em28xx *dev,
 984                         unsigned int width, unsigned int height,
 985                         unsigned int *hscale, unsigned int *vscale)
 986 {
 987         unsigned int          maxw = norm_maxw(dev);
 988         unsigned int          maxh = norm_maxh(dev);
 989
 990         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 991         if (*hscale >= 0x4000)
 992                 *hscale = 0x3fff;
 993
 994         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 995         if (*vscale >= 0x4000)
 996                 *vscale = 0x3fff;
 997 }
 998
 999 /* ------------------------------------------------------------------
1000         IOCTL vidioc handling
1001    ------------------------------------------------------------------*/
1002
1003 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1004                                         struct v4l2_format *f)
1005 {
1006         struct em28xx_fh      *fh  = priv;
1007         struct em28xx         *dev = fh->dev;
1008
1009         mutex_lock(&dev->lock);
1010
1011         f->fmt.pix.width = dev->width;
1012         f->fmt.pix.height = dev->height;
1013         f->fmt.pix.pixelformat = dev->format->fourcc;
1014         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1015         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1016         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1017
1018         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1019         if (dev->progressive)
1020                 f->fmt.pix.field = V4L2_FIELD_NONE;
1021         else
1022                 f->fmt.pix.field = dev->interlaced ?
1023                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1024
1025         mutex_unlock(&dev->lock);
1026         return 0;
1027 }
1028
1029 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1030 {
1031         unsigned int i;
1032
1033         for (i = 0; i < ARRAY_SIZE(format); i++)
1034                 if (format[i].fourcc == fourcc)
1035                         return &format[i];
1036
1037         return NULL;
1038 }
1039
1040 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1041                         struct v4l2_format *f)
1042 {
1043         struct em28xx_fh      *fh    = priv;
1044         struct em28xx         *dev   = fh->dev;
1045         unsigned int          width  = f->fmt.pix.width;
1046         unsigned int          height = f->fmt.pix.height;
1047         unsigned int          maxw   = norm_maxw(dev);
1048         unsigned int          maxh   = norm_maxh(dev);
1049         unsigned int          hscale, vscale;
1050         struct em28xx_fmt     *fmt;
1051
1052         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1053         if (!fmt) {
1054                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1055                                 f->fmt.pix.pixelformat);
1056                 return -EINVAL;
1057         }
1058
1059         if (dev->board.is_em2800) {
1060                 /* the em2800 can only scale down to 50% */
1061                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1062                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1063                 /* According to empiatech support the MaxPacketSize is too small
1064                  * to support framesizes larger than 640x480 @ 30 fps or 640x576
1065                  * @ 25 fps.  As this would cut of a part of the image we prefer
1066                  * 360x576 or 360x480 for now */
1067                 if (width == maxw && height == maxh)
1068                         width /= 2;
1069         } else {
1070                 /* width must even because of the YUYV format
1071                    height must be even because of interlacing */
1072                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1073                                       1, 0);
1074         }
1075
1076         get_scale(dev, width, height, &hscale, &vscale);
1077
1078         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1079         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1080
1081         f->fmt.pix.width = width;
1082         f->fmt.pix.height = height;
1083         f->fmt.pix.pixelformat = fmt->fourcc;
1084         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1085         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1086         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1087         if (dev->progressive)
1088                 f->fmt.pix.field = V4L2_FIELD_NONE;
1089         else
1090                 f->fmt.pix.field = dev->interlaced ?
1091                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1092
1093         return 0;
1094 }
1095
1096 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1097                                    unsigned width, unsigned height)
1098 {
1099         struct em28xx_fmt     *fmt;
1100
1101         fmt = format_by_fourcc(fourcc);
1102         if (!fmt)
1103                 return -EINVAL;
1104
1105         dev->format = fmt;
1106         dev->width  = width;
1107         dev->height = height;
1108
1109         /* set new image size */
1110         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1111
1112         em28xx_set_alternate(dev);
1113         em28xx_resolution_set(dev);
1114
1115         return 0;
1116 }
1117
1118 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1119                         struct v4l2_format *f)
1120 {
1121         struct em28xx_fh      *fh  = priv;
1122         struct em28xx         *dev = fh->dev;
1123         int                   rc;
1124
1125         rc = check_dev(dev);
1126         if (rc < 0)
1127                 return rc;
1128
1129         mutex_lock(&dev->lock);
1130
1131         vidioc_try_fmt_vid_cap(file, priv, f);
1132
1133         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1134                 em28xx_errdev("%s queue busy\n", __func__);
1135                 rc = -EBUSY;
1136                 goto out;
1137         }
1138
1139         rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1140                                 f->fmt.pix.width, f->fmt.pix.height);
1141
1142 out:
1143         mutex_unlock(&dev->lock);
1144         return rc;
1145 }
1146
1147 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1148 {
1149         struct em28xx_fh   *fh  = priv;
1150         struct em28xx      *dev = fh->dev;
1151         int                rc;
1152
1153         rc = check_dev(dev);
1154         if (rc < 0)
1155                 return rc;
1156
1157         *norm = dev->norm;
1158
1159         return 0;
1160 }
1161
1162 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1163 {
1164         struct em28xx_fh   *fh  = priv;
1165         struct em28xx      *dev = fh->dev;
1166         struct v4l2_format f;
1167         int                rc;
1168
1169         rc = check_dev(dev);
1170         if (rc < 0)
1171                 return rc;
1172
1173         mutex_lock(&dev->lock);
1174         dev->norm = *norm;
1175
1176         /* Adjusts width/height, if needed */
1177         f.fmt.pix.width = dev->width;
1178         f.fmt.pix.height = dev->height;
1179         vidioc_try_fmt_vid_cap(file, priv, &f);
1180
1181         /* set new image size */
1182         dev->width = f.fmt.pix.width;
1183         dev->height = f.fmt.pix.height;
1184         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1185
1186         em28xx_resolution_set(dev);
1187         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1188
1189         mutex_unlock(&dev->lock);
1190         return 0;
1191 }
1192
1193 static int vidioc_g_parm(struct file *file, void *priv,
1194                          struct v4l2_streamparm *p)
1195 {
1196         struct em28xx_fh   *fh  = priv;
1197         struct em28xx      *dev = fh->dev;
1198         int rc = 0;
1199
1200         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1201                 return -EINVAL;
1202
1203         if (dev->board.is_webcam)
1204                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1205                                                 video, g_parm, p);
1206         else
1207                 v4l2_video_std_frame_period(dev->norm,
1208                                                  &p->parm.capture.timeperframe);
1209
1210         return rc;
1211 }
1212
1213 static int vidioc_s_parm(struct file *file, void *priv,
1214                          struct v4l2_streamparm *p)
1215 {
1216         struct em28xx_fh   *fh  = priv;
1217         struct em28xx      *dev = fh->dev;
1218
1219         if (!dev->board.is_webcam)
1220                 return -EINVAL;
1221
1222         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1223                 return -EINVAL;
1224
1225         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1226 }
1227
1228 static const char *iname[] = {
1229         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1230         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1231         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1232         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1233         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1234         [EM28XX_VMUX_TELEVISION] = "Television",
1235         [EM28XX_VMUX_CABLE]      = "Cable TV",
1236         [EM28XX_VMUX_DVB]        = "DVB",
1237         [EM28XX_VMUX_DEBUG]      = "for debug only",
1238 };
1239
1240 static int vidioc_enum_input(struct file *file, void *priv,
1241                                 struct v4l2_input *i)
1242 {
1243         struct em28xx_fh   *fh  = priv;
1244         struct em28xx      *dev = fh->dev;
1245         unsigned int       n;
1246
1247         n = i->index;
1248         if (n >= MAX_EM28XX_INPUT)
1249                 return -EINVAL;
1250         if (0 == INPUT(n)->type)
1251                 return -EINVAL;
1252
1253         i->index = n;
1254         i->type = V4L2_INPUT_TYPE_CAMERA;
1255
1256         strcpy(i->name, iname[INPUT(n)->type]);
1257
1258         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1259                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1260                 i->type = V4L2_INPUT_TYPE_TUNER;
1261
1262         i->std = dev->vdev->tvnorms;
1263
1264         return 0;
1265 }
1266
1267 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1268 {
1269         struct em28xx_fh   *fh  = priv;
1270         struct em28xx      *dev = fh->dev;
1271
1272         *i = dev->ctl_input;
1273
1274         return 0;
1275 }
1276
1277 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1278 {
1279         struct em28xx_fh   *fh  = priv;
1280         struct em28xx      *dev = fh->dev;
1281         int                rc;
1282
1283         rc = check_dev(dev);
1284         if (rc < 0)
1285                 return rc;
1286
1287         if (i >= MAX_EM28XX_INPUT)
1288                 return -EINVAL;
1289         if (0 == INPUT(i)->type)
1290                 return -EINVAL;
1291
1292         dev->ctl_input = i;
1293
1294         mutex_lock(&dev->lock);
1295         video_mux(dev, dev->ctl_input);
1296         mutex_unlock(&dev->lock);
1297         return 0;
1298 }
1299
1300 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1301 {
1302         struct em28xx_fh   *fh    = priv;
1303         struct em28xx      *dev   = fh->dev;
1304
1305         if (!dev->audio_mode.has_audio)
1306                 return -EINVAL;
1307
1308         switch (a->index) {
1309         case EM28XX_AMUX_VIDEO:
1310                 strcpy(a->name, "Television");
1311                 break;
1312         case EM28XX_AMUX_LINE_IN:
1313                 strcpy(a->name, "Line In");
1314                 break;
1315         case EM28XX_AMUX_VIDEO2:
1316                 strcpy(a->name, "Television alt");
1317                 break;
1318         case EM28XX_AMUX_PHONE:
1319                 strcpy(a->name, "Phone");
1320                 break;
1321         case EM28XX_AMUX_MIC:
1322                 strcpy(a->name, "Mic");
1323                 break;
1324         case EM28XX_AMUX_CD:
1325                 strcpy(a->name, "CD");
1326                 break;
1327         case EM28XX_AMUX_AUX:
1328                 strcpy(a->name, "Aux");
1329                 break;
1330         case EM28XX_AMUX_PCM_OUT:
1331                 strcpy(a->name, "PCM");
1332                 break;
1333         default:
1334                 return -EINVAL;
1335         }
1336
1337         a->index = dev->ctl_ainput;
1338         a->capability = V4L2_AUDCAP_STEREO;
1339
1340         return 0;
1341 }
1342
1343 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1344 {
1345         struct em28xx_fh   *fh  = priv;
1346         struct em28xx      *dev = fh->dev;
1347
1348
1349         if (!dev->audio_mode.has_audio)
1350                 return -EINVAL;
1351
1352         if (a->index >= MAX_EM28XX_INPUT)
1353                 return -EINVAL;
1354         if (0 == INPUT(a->index)->type)
1355                 return -EINVAL;
1356
1357         mutex_lock(&dev->lock);
1358
1359         dev->ctl_ainput = INPUT(a->index)->amux;
1360         dev->ctl_aoutput = INPUT(a->index)->aout;
1361
1362         if (!dev->ctl_aoutput)
1363                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1364
1365         mutex_unlock(&dev->lock);
1366         return 0;
1367 }
1368
1369 static int vidioc_queryctrl(struct file *file, void *priv,
1370                                 struct v4l2_queryctrl *qc)
1371 {
1372         struct em28xx_fh      *fh  = priv;
1373         struct em28xx         *dev = fh->dev;
1374         int                   id  = qc->id;
1375         int                   rc;
1376
1377         rc = check_dev(dev);
1378         if (rc < 0)
1379                 return rc;
1380
1381         memset(qc, 0, sizeof(*qc));
1382
1383         qc->id = id;
1384
1385         /* enumberate AC97 controls */
1386         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1387                 rc = ac97_queryctrl(qc);
1388                 if (!rc)
1389                         return 0;
1390         }
1391
1392         /* enumberate V4L2 device controls */
1393         mutex_lock(&dev->lock);
1394         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1395         mutex_unlock(&dev->lock);
1396
1397         if (qc->type)
1398                 return 0;
1399         else
1400                 return -EINVAL;
1401 }
1402
1403 static int vidioc_g_ctrl(struct file *file, void *priv,
1404                                 struct v4l2_control *ctrl)
1405 {
1406         struct em28xx_fh      *fh  = priv;
1407         struct em28xx         *dev = fh->dev;
1408         int                   rc;
1409
1410         rc = check_dev(dev);
1411         if (rc < 0)
1412                 return rc;
1413         rc = 0;
1414
1415         mutex_lock(&dev->lock);
1416
1417         /* Set an AC97 control */
1418         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1419                 rc = ac97_get_ctrl(dev, ctrl);
1420         else
1421                 rc = 1;
1422
1423         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1424         if (rc == 1) {
1425                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1426                 rc = 0;
1427         }
1428
1429         mutex_unlock(&dev->lock);
1430         return rc;
1431 }
1432
1433 static int vidioc_s_ctrl(struct file *file, void *priv,
1434                                 struct v4l2_control *ctrl)
1435 {
1436         struct em28xx_fh      *fh  = priv;
1437         struct em28xx         *dev = fh->dev;
1438         int                   rc;
1439
1440         rc = check_dev(dev);
1441         if (rc < 0)
1442                 return rc;
1443
1444         mutex_lock(&dev->lock);
1445
1446         /* Set an AC97 control */
1447         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1448                 rc = ac97_set_ctrl(dev, ctrl);
1449         else
1450                 rc = 1;
1451
1452         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1453         if (rc == 1) {
1454                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1455
1456                 /*
1457                  * In the case of non-AC97 volume controls, we still need
1458                  * to do some setups at em28xx, in order to mute/unmute
1459                  * and to adjust audio volume. However, the value ranges
1460                  * should be checked by the corresponding V4L subdriver.
1461                  */
1462                 switch (ctrl->id) {
1463                 case V4L2_CID_AUDIO_MUTE:
1464                         dev->mute = ctrl->value;
1465                         rc = em28xx_audio_analog_set(dev);
1466                         break;
1467                 case V4L2_CID_AUDIO_VOLUME:
1468                         dev->volume = ctrl->value;
1469                         rc = em28xx_audio_analog_set(dev);
1470                 }
1471         }
1472
1473         mutex_unlock(&dev->lock);
1474         return rc;
1475 }
1476
1477 static int vidioc_g_tuner(struct file *file, void *priv,
1478                                 struct v4l2_tuner *t)
1479 {
1480         struct em28xx_fh      *fh  = priv;
1481         struct em28xx         *dev = fh->dev;
1482         int                   rc;
1483
1484         rc = check_dev(dev);
1485         if (rc < 0)
1486                 return rc;
1487
1488         if (0 != t->index)
1489                 return -EINVAL;
1490
1491         strcpy(t->name, "Tuner");
1492
1493         mutex_lock(&dev->lock);
1494         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1495         mutex_unlock(&dev->lock);
1496
1497         return 0;
1498 }
1499
1500 static int vidioc_s_tuner(struct file *file, void *priv,
1501                                 struct v4l2_tuner *t)
1502 {
1503         struct em28xx_fh      *fh  = priv;
1504         struct em28xx         *dev = fh->dev;
1505         int                   rc;
1506
1507         rc = check_dev(dev);
1508         if (rc < 0)
1509                 return rc;
1510
1511         if (0 != t->index)
1512                 return -EINVAL;
1513
1514         mutex_lock(&dev->lock);
1515         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1516         mutex_unlock(&dev->lock);
1517
1518         return 0;
1519 }
1520
1521 static int vidioc_g_frequency(struct file *file, void *priv,
1522                                 struct v4l2_frequency *f)
1523 {
1524         struct em28xx_fh      *fh  = priv;
1525         struct em28xx         *dev = fh->dev;
1526
1527         mutex_lock(&dev->lock);
1528         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1529         f->frequency = dev->ctl_freq;
1530         mutex_unlock(&dev->lock);
1531
1532         return 0;
1533 }
1534
1535 static int vidioc_s_frequency(struct file *file, void *priv,
1536                                 struct v4l2_frequency *f)
1537 {
1538         struct em28xx_fh      *fh  = priv;
1539         struct em28xx         *dev = fh->dev;
1540         int                   rc;
1541
1542         rc = check_dev(dev);
1543         if (rc < 0)
1544                 return rc;
1545
1546         if (0 != f->tuner)
1547                 return -EINVAL;
1548
1549         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1550                 return -EINVAL;
1551         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1552                 return -EINVAL;
1553
1554         mutex_lock(&dev->lock);
1555
1556         dev->ctl_freq = f->frequency;
1557         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1558
1559         mutex_unlock(&dev->lock);
1560
1561         return 0;
1562 }
1563
1564 #ifdef CONFIG_VIDEO_ADV_DEBUG
1565 static int em28xx_reg_len(int reg)
1566 {
1567         switch (reg) {
1568         case EM28XX_R40_AC97LSB:
1569         case EM28XX_R30_HSCALELOW:
1570         case EM28XX_R32_VSCALELOW:
1571                 return 2;
1572         default:
1573                 return 1;
1574         }
1575 }
1576
1577 static int vidioc_g_chip_ident(struct file *file, void *priv,
1578                struct v4l2_dbg_chip_ident *chip)
1579 {
1580         struct em28xx_fh      *fh  = priv;
1581         struct em28xx         *dev = fh->dev;
1582
1583         chip->ident = V4L2_IDENT_NONE;
1584         chip->revision = 0;
1585
1586         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1587
1588         return 0;
1589 }
1590
1591
1592 static int vidioc_g_register(struct file *file, void *priv,
1593                              struct v4l2_dbg_register *reg)
1594 {
1595         struct em28xx_fh      *fh  = priv;
1596         struct em28xx         *dev = fh->dev;
1597         int ret;
1598
1599         switch (reg->match.type) {
1600         case V4L2_CHIP_MATCH_AC97:
1601                 mutex_lock(&dev->lock);
1602                 ret = em28xx_read_ac97(dev, reg->reg);
1603                 mutex_unlock(&dev->lock);
1604                 if (ret < 0)
1605                         return ret;
1606
1607                 reg->val = ret;
1608                 reg->size = 1;
1609                 return 0;
1610         case V4L2_CHIP_MATCH_I2C_DRIVER:
1611                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1612                 return 0;
1613         case V4L2_CHIP_MATCH_I2C_ADDR:
1614                 /* TODO: is this correct? */
1615                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1616                 return 0;
1617         default:
1618                 if (!v4l2_chip_match_host(&reg->match))
1619                         return -EINVAL;
1620         }
1621
1622         /* Match host */
1623         reg->size = em28xx_reg_len(reg->reg);
1624         if (reg->size == 1) {
1625                 mutex_lock(&dev->lock);
1626                 ret = em28xx_read_reg(dev, reg->reg);
1627                 mutex_unlock(&dev->lock);
1628
1629                 if (ret < 0)
1630                         return ret;
1631
1632                 reg->val = ret;
1633         } else {
1634                 __le16 val = 0;
1635                 mutex_lock(&dev->lock);
1636                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1637                                                    reg->reg, (char *)&val, 2);
1638                 mutex_unlock(&dev->lock);
1639                 if (ret < 0)
1640                         return ret;
1641
1642                 reg->val = le16_to_cpu(val);
1643         }
1644
1645         return 0;
1646 }
1647
1648 static int vidioc_s_register(struct file *file, void *priv,
1649                              struct v4l2_dbg_register *reg)
1650 {
1651         struct em28xx_fh      *fh  = priv;
1652         struct em28xx         *dev = fh->dev;
1653         __le16 buf;
1654         int    rc;
1655
1656         switch (reg->match.type) {
1657         case V4L2_CHIP_MATCH_AC97:
1658                 mutex_lock(&dev->lock);
1659                 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1660                 mutex_unlock(&dev->lock);
1661
1662                 return rc;
1663         case V4L2_CHIP_MATCH_I2C_DRIVER:
1664                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1665                 return 0;
1666         case V4L2_CHIP_MATCH_I2C_ADDR:
1667                 /* TODO: is this correct? */
1668                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1669                 return 0;
1670         default:
1671                 if (!v4l2_chip_match_host(&reg->match))
1672                         return -EINVAL;
1673         }
1674
1675         /* Match host */
1676         buf = cpu_to_le16(reg->val);
1677
1678         mutex_lock(&dev->lock);
1679         rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1680                                em28xx_reg_len(reg->reg));
1681         mutex_unlock(&dev->lock);
1682
1683         return rc;
1684 }
1685 #endif
1686
1687
1688 static int vidioc_cropcap(struct file *file, void *priv,
1689                                         struct v4l2_cropcap *cc)
1690 {
1691         struct em28xx_fh      *fh  = priv;
1692         struct em28xx         *dev = fh->dev;
1693
1694         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1695                 return -EINVAL;
1696
1697         cc->bounds.left = 0;
1698         cc->bounds.top = 0;
1699         cc->bounds.width = dev->width;
1700         cc->bounds.height = dev->height;
1701         cc->defrect = cc->bounds;
1702         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1703         cc->pixelaspect.denominator = 59;
1704
1705         return 0;
1706 }
1707
1708 static int vidioc_streamon(struct file *file, void *priv,
1709                                         enum v4l2_buf_type type)
1710 {
1711         struct em28xx_fh      *fh  = priv;
1712         struct em28xx         *dev = fh->dev;
1713         int                   rc = -EINVAL;
1714
1715         rc = check_dev(dev);
1716         if (rc < 0)
1717                 return rc;
1718
1719         if (unlikely(type != fh->type))
1720                 return -EINVAL;
1721
1722         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1723                         fh, type, fh->resources, dev->resources);
1724
1725         if (unlikely(!res_get(fh, get_ressource(fh))))
1726                 return -EBUSY;
1727
1728         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1729                 rc = videobuf_streamon(&fh->vb_vidq);
1730         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1731                 rc = videobuf_streamon(&fh->vb_vbiq);
1732
1733         return rc;
1734 }
1735
1736 static int vidioc_streamoff(struct file *file, void *priv,
1737                                         enum v4l2_buf_type type)
1738 {
1739         struct em28xx_fh      *fh  = priv;
1740         struct em28xx         *dev = fh->dev;
1741         int                   rc;
1742
1743         rc = check_dev(dev);
1744         if (rc < 0)
1745                 return rc;
1746
1747         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1748             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1749                 return -EINVAL;
1750         if (type != fh->type)
1751                 return -EINVAL;
1752
1753         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1754                         fh, type, fh->resources, dev->resources);
1755
1756         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1757                 videobuf_streamoff(&fh->vb_vidq);
1758                 res_free(fh, EM28XX_RESOURCE_VIDEO);
1759         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1760                 videobuf_streamoff(&fh->vb_vbiq);
1761                 res_free(fh, EM28XX_RESOURCE_VBI);
1762         }
1763
1764         return 0;
1765 }
1766
1767 static int vidioc_querycap(struct file *file, void  *priv,
1768                                         struct v4l2_capability *cap)
1769 {
1770         struct em28xx_fh      *fh  = priv;
1771         struct em28xx         *dev = fh->dev;
1772
1773         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1774         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1775         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1776
1777         cap->version = EM28XX_VERSION_CODE;
1778
1779         cap->capabilities =
1780                         V4L2_CAP_SLICED_VBI_CAPTURE |
1781                         V4L2_CAP_VIDEO_CAPTURE |
1782                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1783
1784         if (dev->vbi_dev)
1785                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1786
1787         if (dev->audio_mode.has_audio)
1788                 cap->capabilities |= V4L2_CAP_AUDIO;
1789
1790         if (dev->tuner_type != TUNER_ABSENT)
1791                 cap->capabilities |= V4L2_CAP_TUNER;
1792
1793         return 0;
1794 }
1795
1796 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1797                                         struct v4l2_fmtdesc *f)
1798 {
1799         if (unlikely(f->index >= ARRAY_SIZE(format)))
1800                 return -EINVAL;
1801
1802         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1803         f->pixelformat = format[f->index].fourcc;
1804
1805         return 0;
1806 }
1807
1808 /* Sliced VBI ioctls */
1809 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1810                                         struct v4l2_format *f)
1811 {
1812         struct em28xx_fh      *fh  = priv;
1813         struct em28xx         *dev = fh->dev;
1814         int                   rc;
1815
1816         rc = check_dev(dev);
1817         if (rc < 0)
1818                 return rc;
1819
1820         mutex_lock(&dev->lock);
1821
1822         f->fmt.sliced.service_set = 0;
1823         v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1824
1825         if (f->fmt.sliced.service_set == 0)
1826                 rc = -EINVAL;
1827
1828         mutex_unlock(&dev->lock);
1829
1830         return rc;
1831 }
1832
1833 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1834                         struct v4l2_format *f)
1835 {
1836         struct em28xx_fh      *fh  = priv;
1837         struct em28xx         *dev = fh->dev;
1838         int                   rc;
1839
1840         rc = check_dev(dev);
1841         if (rc < 0)
1842                 return rc;
1843
1844         mutex_lock(&dev->lock);
1845         v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1846         mutex_unlock(&dev->lock);
1847
1848         if (f->fmt.sliced.service_set == 0)
1849                 return -EINVAL;
1850
1851         return 0;
1852 }
1853
1854 /* RAW VBI ioctls */
1855
1856 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1857                                 struct v4l2_format *format)
1858 {
1859         format->fmt.vbi.samples_per_line = 720;
1860         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1861         format->fmt.vbi.offset = 0;
1862         format->fmt.vbi.flags = 0;
1863
1864         /* Varies by video standard (NTSC, PAL, etc.) */
1865         /* FIXME: hard-coded for NTSC support */
1866         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; /* FIXME: ??? */
1867         format->fmt.vbi.count[0] = 12;
1868         format->fmt.vbi.count[1] = 12;
1869         format->fmt.vbi.start[0] = 10;
1870         format->fmt.vbi.start[1] = 273;
1871
1872         return 0;
1873 }
1874
1875 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1876                                 struct v4l2_format *format)
1877 {
1878         format->fmt.vbi.samples_per_line = 720;
1879         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1880         format->fmt.vbi.offset = 0;
1881         format->fmt.vbi.flags = 0;
1882
1883         /* Varies by video standard (NTSC, PAL, etc.) */
1884         /* FIXME: hard-coded for NTSC support */
1885         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; /* FIXME: ??? */
1886         format->fmt.vbi.count[0] = 12;
1887         format->fmt.vbi.count[1] = 12;
1888         format->fmt.vbi.start[0] = 10;
1889         format->fmt.vbi.start[1] = 273;
1890
1891         return 0;
1892 }
1893
1894 static int vidioc_reqbufs(struct file *file, void *priv,
1895                           struct v4l2_requestbuffers *rb)
1896 {
1897         struct em28xx_fh      *fh  = priv;
1898         struct em28xx         *dev = fh->dev;
1899         int                   rc;
1900
1901         rc = check_dev(dev);
1902         if (rc < 0)
1903                 return rc;
1904
1905         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1906                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1907         else
1908                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1909 }
1910
1911 static int vidioc_querybuf(struct file *file, void *priv,
1912                            struct v4l2_buffer *b)
1913 {
1914         struct em28xx_fh      *fh  = priv;
1915         struct em28xx         *dev = fh->dev;
1916         int                   rc;
1917
1918         rc = check_dev(dev);
1919         if (rc < 0)
1920                 return rc;
1921
1922         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1923                 return videobuf_querybuf(&fh->vb_vidq, b);
1924         else {
1925                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1926                    the videobuf framework, but we probably shouldn't be
1927                    returning a buffer larger than that which was asked for.
1928                    At a minimum, it causes a crash in zvbi since it does
1929                    a memcpy based on the source buffer length */
1930                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1931                 b->length = 17280;
1932                 return result;
1933         }
1934 }
1935
1936 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1937 {
1938         struct em28xx_fh      *fh  = priv;
1939         struct em28xx         *dev = fh->dev;
1940         int                   rc;
1941
1942         rc = check_dev(dev);
1943         if (rc < 0)
1944                 return rc;
1945
1946         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1947                 return videobuf_qbuf(&fh->vb_vidq, b);
1948         else
1949                 return videobuf_qbuf(&fh->vb_vbiq, b);
1950 }
1951
1952 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1953 {
1954         struct em28xx_fh      *fh  = priv;
1955         struct em28xx         *dev = fh->dev;
1956         int                   rc;
1957
1958         rc = check_dev(dev);
1959         if (rc < 0)
1960                 return rc;
1961
1962         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1963                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1964                                       O_NONBLOCK);
1965         else
1966                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1967                                       O_NONBLOCK);
1968 }
1969
1970 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1971 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1972 {
1973         struct em28xx_fh  *fh = priv;
1974
1975         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1976                 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1977         else
1978                 return videobuf_cgmbuf(&fh->vb_vbiq, mbuf, 8);
1979 }
1980 #endif
1981
1982
1983 /* ----------------------------------------------------------- */
1984 /* RADIO ESPECIFIC IOCTLS                                      */
1985 /* ----------------------------------------------------------- */
1986
1987 static int radio_querycap(struct file *file, void  *priv,
1988                           struct v4l2_capability *cap)
1989 {
1990         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1991
1992         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1993         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1994         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1995
1996         cap->version = EM28XX_VERSION_CODE;
1997         cap->capabilities = V4L2_CAP_TUNER;
1998         return 0;
1999 }
2000
2001 static int radio_g_tuner(struct file *file, void *priv,
2002                          struct v4l2_tuner *t)
2003 {
2004         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2005
2006         if (unlikely(t->index > 0))
2007                 return -EINVAL;
2008
2009         strcpy(t->name, "Radio");
2010         t->type = V4L2_TUNER_RADIO;
2011
2012         mutex_lock(&dev->lock);
2013         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2014         mutex_unlock(&dev->lock);
2015
2016         return 0;
2017 }
2018
2019 static int radio_enum_input(struct file *file, void *priv,
2020                             struct v4l2_input *i)
2021 {
2022         if (i->index != 0)
2023                 return -EINVAL;
2024         strcpy(i->name, "Radio");
2025         i->type = V4L2_INPUT_TYPE_TUNER;
2026
2027         return 0;
2028 }
2029
2030 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2031 {
2032         if (unlikely(a->index))
2033                 return -EINVAL;
2034
2035         strcpy(a->name, "Radio");
2036         return 0;
2037 }
2038
2039 static int radio_s_tuner(struct file *file, void *priv,
2040                          struct v4l2_tuner *t)
2041 {
2042         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2043
2044         if (0 != t->index)
2045                 return -EINVAL;
2046
2047         mutex_lock(&dev->lock);
2048         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2049         mutex_unlock(&dev->lock);
2050
2051         return 0;
2052 }
2053
2054 static int radio_s_audio(struct file *file, void *fh,
2055                          struct v4l2_audio *a)
2056 {
2057         return 0;
2058 }
2059
2060 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2061 {
2062         return 0;
2063 }
2064
2065 static int radio_queryctrl(struct file *file, void *priv,
2066                            struct v4l2_queryctrl *qc)
2067 {
2068         int i;
2069
2070         if (qc->id <  V4L2_CID_BASE ||
2071                 qc->id >= V4L2_CID_LASTP1)
2072                 return -EINVAL;
2073
2074         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2075                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2076                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2077                         return 0;
2078                 }
2079         }
2080
2081         return -EINVAL;
2082 }
2083
2084 /*
2085  * em28xx_v4l2_open()
2086  * inits the device and starts isoc transfer
2087  */
2088 static int em28xx_v4l2_open(struct file *filp)
2089 {
2090         int minor = video_devdata(filp)->minor;
2091         int errCode = 0, radio;
2092         struct em28xx *dev;
2093         enum v4l2_buf_type fh_type;
2094         struct em28xx_fh *fh;
2095         enum v4l2_field field;
2096
2097         dev = em28xx_get_device(minor, &fh_type, &radio);
2098
2099         if (NULL == dev)
2100                 return -ENODEV;
2101
2102         mutex_lock(&dev->lock);
2103
2104         em28xx_videodbg("open minor=%d type=%s users=%d\n",
2105                                 minor, v4l2_type_names[fh_type], dev->users);
2106
2107
2108         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2109         if (!fh) {
2110                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2111                 mutex_unlock(&dev->lock);
2112                 return -ENOMEM;
2113         }
2114         fh->dev = dev;
2115         fh->radio = radio;
2116         fh->type = fh_type;
2117         filp->private_data = fh;
2118
2119         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2120                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2121                 em28xx_set_alternate(dev);
2122                 em28xx_resolution_set(dev);
2123
2124                 /* Needed, since GPIO might have disabled power of
2125                    some i2c device
2126                  */
2127                 em28xx_wake_i2c(dev);
2128
2129         }
2130         if (fh->radio) {
2131                 em28xx_videodbg("video_open: setting radio device\n");
2132                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2133         }
2134
2135         dev->users++;
2136
2137         if (dev->progressive)
2138                 field = V4L2_FIELD_NONE;
2139         else
2140                 field = V4L2_FIELD_INTERLACED;
2141
2142         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2143                                     NULL, &dev->slock,
2144                                     V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2145                                     sizeof(struct em28xx_buffer), fh);
2146
2147         videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2148                                     NULL, &dev->slock,
2149                                     V4L2_BUF_TYPE_VBI_CAPTURE,
2150                                     V4L2_FIELD_SEQ_TB,
2151                                     sizeof(struct em28xx_buffer), fh);
2152
2153         mutex_unlock(&dev->lock);
2154
2155         return errCode;
2156 }
2157
2158 /*
2159  * em28xx_realease_resources()
2160  * unregisters the v4l2,i2c and usb devices
2161  * called when the device gets disconected or at module unload
2162 */
2163 void em28xx_release_analog_resources(struct em28xx *dev)
2164 {
2165
2166         /*FIXME: I2C IR should be disconnected */
2167
2168         if (dev->radio_dev) {
2169                 if (-1 != dev->radio_dev->minor)
2170                         video_unregister_device(dev->radio_dev);
2171                 else
2172                         video_device_release(dev->radio_dev);
2173                 dev->radio_dev = NULL;
2174         }
2175         if (dev->vbi_dev) {
2176                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
2177                             dev->vbi_dev->num);
2178                 if (-1 != dev->vbi_dev->minor)
2179                         video_unregister_device(dev->vbi_dev);
2180                 else
2181                         video_device_release(dev->vbi_dev);
2182                 dev->vbi_dev = NULL;
2183         }
2184         if (dev->vdev) {
2185                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
2186                             dev->vdev->num);
2187                 if (-1 != dev->vdev->minor)
2188                         video_unregister_device(dev->vdev);
2189                 else
2190                         video_device_release(dev->vdev);
2191                 dev->vdev = NULL;
2192         }
2193 }
2194
2195 /*
2196  * em28xx_v4l2_close()
2197  * stops streaming and deallocates all resources allocated by the v4l2
2198  * calls and ioctls
2199  */
2200 static int em28xx_v4l2_close(struct file *filp)
2201 {
2202         struct em28xx_fh *fh  = filp->private_data;
2203         struct em28xx    *dev = fh->dev;
2204         int              errCode;
2205
2206         em28xx_videodbg("users=%d\n", dev->users);
2207
2208         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2209                 videobuf_stop(&fh->vb_vidq);
2210                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2211         }
2212
2213         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2214                 videobuf_stop(&fh->vb_vbiq);
2215                 res_free(fh, EM28XX_RESOURCE_VBI);
2216         }
2217
2218         if (dev->users == 1) {
2219                 /* the device is already disconnect,
2220                    free the remaining resources */
2221                 if (dev->state & DEV_DISCONNECTED) {
2222                         em28xx_release_resources(dev);
2223                         kfree(dev);
2224                         return 0;
2225                 }
2226
2227                 /* Save some power by putting tuner to sleep */
2228                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
2229
2230                 /* do this before setting alternate! */
2231                 em28xx_uninit_isoc(dev);
2232                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2233
2234                 /* set alternate 0 */
2235                 dev->alt = 0;
2236                 em28xx_videodbg("setting alternate 0\n");
2237                 errCode = usb_set_interface(dev->udev, 0, 0);
2238                 if (errCode < 0) {
2239                         em28xx_errdev("cannot change alternate number to "
2240                                         "0 (error=%i)\n", errCode);
2241                 }
2242         }
2243
2244         videobuf_mmap_free(&fh->vb_vidq);
2245         videobuf_mmap_free(&fh->vb_vbiq);
2246         kfree(fh);
2247         dev->users--;
2248         wake_up_interruptible_nr(&dev->open, 1);
2249         return 0;
2250 }
2251
2252 /*
2253  * em28xx_v4l2_read()
2254  * will allocate buffers when called for the first time
2255  */
2256 static ssize_t
2257 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2258                  loff_t *pos)
2259 {
2260         struct em28xx_fh *fh = filp->private_data;
2261         struct em28xx *dev = fh->dev;
2262         int rc;
2263
2264         rc = check_dev(dev);
2265         if (rc < 0)
2266                 return rc;
2267
2268         /* FIXME: read() is not prepared to allow changing the video
2269            resolution while streaming. Seems a bug at em28xx_set_fmt
2270          */
2271
2272         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2273                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2274                         return -EBUSY;
2275
2276                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2277                                         filp->f_flags & O_NONBLOCK);
2278         }
2279
2280
2281         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2282                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2283                         return -EBUSY;
2284
2285                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2286                                         filp->f_flags & O_NONBLOCK);
2287         }
2288
2289         return 0;
2290 }
2291
2292 /*
2293  * em28xx_v4l2_poll()
2294  * will allocate buffers when called for the first time
2295  */
2296 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2297 {
2298         struct em28xx_fh *fh = filp->private_data;
2299         struct em28xx *dev = fh->dev;
2300         int rc;
2301
2302         rc = check_dev(dev);
2303         if (rc < 0)
2304                 return rc;
2305
2306         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2307                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2308                         return POLLERR;
2309                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2310         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2311                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2312                         return POLLERR;
2313                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2314         } else {
2315                 return POLLERR;
2316         }
2317 }
2318
2319 /*
2320  * em28xx_v4l2_mmap()
2321  */
2322 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2323 {
2324         struct em28xx_fh *fh    = filp->private_data;
2325         struct em28xx    *dev   = fh->dev;
2326         int              rc;
2327
2328         rc = check_dev(dev);
2329         if (rc < 0)
2330                 return rc;
2331
2332         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2333                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2334         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2335                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2336
2337         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2338                 (unsigned long)vma->vm_start,
2339                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2340                 rc);
2341
2342         return rc;
2343 }
2344
2345 static const struct v4l2_file_operations em28xx_v4l_fops = {
2346         .owner         = THIS_MODULE,
2347         .open          = em28xx_v4l2_open,
2348         .release       = em28xx_v4l2_close,
2349         .read          = em28xx_v4l2_read,
2350         .poll          = em28xx_v4l2_poll,
2351         .mmap          = em28xx_v4l2_mmap,
2352         .ioctl         = video_ioctl2,
2353 };
2354
2355 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2356         .vidioc_querycap            = vidioc_querycap,
2357         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2358         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2359         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2360         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2361         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2362         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2363         .vidioc_g_audio             = vidioc_g_audio,
2364         .vidioc_s_audio             = vidioc_s_audio,
2365         .vidioc_cropcap             = vidioc_cropcap,
2366
2367         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2368         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2369         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2370
2371         .vidioc_reqbufs             = vidioc_reqbufs,
2372         .vidioc_querybuf            = vidioc_querybuf,
2373         .vidioc_qbuf                = vidioc_qbuf,
2374         .vidioc_dqbuf               = vidioc_dqbuf,
2375         .vidioc_g_std               = vidioc_g_std,
2376         .vidioc_s_std               = vidioc_s_std,
2377         .vidioc_g_parm              = vidioc_g_parm,
2378         .vidioc_s_parm              = vidioc_s_parm,
2379         .vidioc_enum_input          = vidioc_enum_input,
2380         .vidioc_g_input             = vidioc_g_input,
2381         .vidioc_s_input             = vidioc_s_input,
2382         .vidioc_queryctrl           = vidioc_queryctrl,
2383         .vidioc_g_ctrl              = vidioc_g_ctrl,
2384         .vidioc_s_ctrl              = vidioc_s_ctrl,
2385         .vidioc_streamon            = vidioc_streamon,
2386         .vidioc_streamoff           = vidioc_streamoff,
2387         .vidioc_g_tuner             = vidioc_g_tuner,
2388         .vidioc_s_tuner             = vidioc_s_tuner,
2389         .vidioc_g_frequency         = vidioc_g_frequency,
2390         .vidioc_s_frequency         = vidioc_s_frequency,
2391 #ifdef CONFIG_VIDEO_ADV_DEBUG
2392         .vidioc_g_register          = vidioc_g_register,
2393         .vidioc_s_register          = vidioc_s_register,
2394         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
2395 #endif
2396 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2397         .vidiocgmbuf                = vidiocgmbuf,
2398 #endif
2399 };
2400
2401 static const struct video_device em28xx_video_template = {
2402         .fops                       = &em28xx_v4l_fops,
2403         .release                    = video_device_release,
2404         .ioctl_ops                  = &video_ioctl_ops,
2405
2406         .minor                      = -1,
2407
2408         .tvnorms                    = V4L2_STD_ALL,
2409         .current_norm               = V4L2_STD_PAL,
2410 };
2411
2412 static const struct v4l2_file_operations radio_fops = {
2413         .owner         = THIS_MODULE,
2414         .open          = em28xx_v4l2_open,
2415         .release       = em28xx_v4l2_close,
2416         .ioctl         = video_ioctl2,
2417 };
2418
2419 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2420         .vidioc_querycap      = radio_querycap,
2421         .vidioc_g_tuner       = radio_g_tuner,
2422         .vidioc_enum_input    = radio_enum_input,
2423         .vidioc_g_audio       = radio_g_audio,
2424         .vidioc_s_tuner       = radio_s_tuner,
2425         .vidioc_s_audio       = radio_s_audio,
2426         .vidioc_s_input       = radio_s_input,
2427         .vidioc_queryctrl     = radio_queryctrl,
2428         .vidioc_g_ctrl        = vidioc_g_ctrl,
2429         .vidioc_s_ctrl        = vidioc_s_ctrl,
2430         .vidioc_g_frequency   = vidioc_g_frequency,
2431         .vidioc_s_frequency   = vidioc_s_frequency,
2432 #ifdef CONFIG_VIDEO_ADV_DEBUG
2433         .vidioc_g_register    = vidioc_g_register,
2434         .vidioc_s_register    = vidioc_s_register,
2435 #endif
2436 };
2437
2438 static struct video_device em28xx_radio_template = {
2439         .name                 = "em28xx-radio",
2440         .fops                 = &radio_fops,
2441         .ioctl_ops            = &radio_ioctl_ops,
2442         .minor                = -1,
2443 };
2444
2445 /******************************** usb interface ******************************/
2446
2447
2448
2449 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2450                                         const struct video_device *template,
2451                                         const char *type_name)
2452 {
2453         struct video_device *vfd;
2454
2455         vfd = video_device_alloc();
2456         if (NULL == vfd)
2457                 return NULL;
2458
2459         *vfd            = *template;
2460         vfd->minor      = -1;
2461         vfd->v4l2_dev   = &dev->v4l2_dev;
2462         vfd->release    = video_device_release;
2463         vfd->debug      = video_debug;
2464
2465         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2466                  dev->name, type_name);
2467
2468         return vfd;
2469 }
2470
2471 int em28xx_register_analog_devices(struct em28xx *dev)
2472 {
2473       u8 val;
2474         int ret;
2475
2476         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
2477                 dev->name,
2478                 (EM28XX_VERSION_CODE >> 16) & 0xff,
2479                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2480
2481         /* set default norm */
2482         dev->norm = em28xx_video_template.current_norm;
2483         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2484         dev->ctl_input = 0;
2485
2486         /* Analog specific initialization */
2487         dev->format = &format[0];
2488         em28xx_set_video_format(dev, format[0].fourcc,
2489                                 norm_maxw(dev), norm_maxh(dev));
2490
2491         video_mux(dev, dev->ctl_input);
2492
2493         /* Audio defaults */
2494         dev->mute = 1;
2495         dev->volume = 0x1f;
2496
2497 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2498         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2499         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2500                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2501
2502         em28xx_set_outfmt(dev);
2503         em28xx_colorlevels_set_default(dev);
2504         em28xx_compression_disable(dev);
2505
2506         /* allocate and fill video video_device struct */
2507         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2508         if (!dev->vdev) {
2509                 em28xx_errdev("cannot allocate video_device.\n");
2510                 return -ENODEV;
2511         }
2512
2513         /* register v4l2 video video_device */
2514         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2515                                        video_nr[dev->devno]);
2516         if (ret) {
2517                 em28xx_errdev("unable to register video device (error=%i).\n",
2518                               ret);
2519                 return ret;
2520         }
2521
2522         /* Allocate and fill vbi video_device struct */
2523         if (em28xx_vbi_supported(dev) == 1) {
2524                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2525                                                 "vbi");
2526
2527                 /* register v4l2 vbi video_device */
2528                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2529                                             vbi_nr[dev->devno]);
2530                 if (ret < 0) {
2531                         em28xx_errdev("unable to register vbi device\n");
2532                         return ret;
2533                 }
2534         }
2535
2536         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2537                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2538                                                   "radio");
2539                 if (!dev->radio_dev) {
2540                         em28xx_errdev("cannot allocate video_device.\n");
2541                         return -ENODEV;
2542                 }
2543                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2544                                             radio_nr[dev->devno]);
2545                 if (ret < 0) {
2546                         em28xx_errdev("can't register radio device\n");
2547                         return ret;
2548                 }
2549                 em28xx_info("Registered radio device as /dev/radio%d\n",
2550                             dev->radio_dev->num);
2551         }
2552
2553         em28xx_info("V4L2 video device registered as /dev/video%d\n",
2554                                 dev->vdev->num);
2555
2556         if (dev->vbi_dev)
2557                 em28xx_info("V4L2 VBI device registered as /dev/vbi%d\n",
2558                             dev->vbi_dev->num);
2559
2560         return 0;
2561 }