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

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
   3                     video capture devices
   4
   5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   6                       Markus Rechberger <mrechberger@gmail.com>
   7                       Mauro Carvalho Chehab <mchehab@infradead.org>
   8                       Sascha Sommer <saschasommer@freenet.de>
   9
  10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  11                 by Luca Risolia <luca.risolia@studio.unibo.it>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/bitmap.h>
  33 #include <linux/usb.h>
  34 #include <linux/i2c.h>
  35 #include <linux/version.h>
  36 #include <linux/mm.h>
  37 #include <linux/mutex.h>
  38 #include <linux/slab.h>
  39
  40 #include "em28xx.h"
  41 #include <media/v4l2-common.h>
  42 #include <media/v4l2-ioctl.h>
  43 #include <media/v4l2-chip-ident.h>
  44 #include <media/msp3400.h>
  45 #include <media/tuner.h>
  46
  47 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  48                       "Markus Rechberger <mrechberger@gmail.com>, " \
  49                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  50                       "Sascha Sommer <saschasommer@freenet.de>"
  51
  52 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  53 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 2)
  54
  55 #define em28xx_videodbg(fmt, arg...) do {\
  56         if (video_debug) \
  57                 printk(KERN_INFO "%s %s :"fmt, \
  58                          dev->name, __func__ , ##arg); } while (0)
  59
  60 static unsigned int isoc_debug;
  61 module_param(isoc_debug, int, 0644);
  62 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  63
  64 #define em28xx_isocdbg(fmt, arg...) \
  65 do {\
  66         if (isoc_debug) { \
  67                 printk(KERN_INFO "%s %s :"fmt, \
  68                          dev->name, __func__ , ##arg); \
  69         } \
  70   } while (0)
  71
  72 MODULE_AUTHOR(DRIVER_AUTHOR);
  73 MODULE_DESCRIPTION(DRIVER_DESC);
  74 MODULE_LICENSE("GPL");
  75
  76 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  77 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79
  80 module_param_array(video_nr, int, NULL, 0444);
  81 module_param_array(vbi_nr, int, NULL, 0444);
  82 module_param_array(radio_nr, int, NULL, 0444);
  83 MODULE_PARM_DESC(video_nr, "video device numbers");
  84 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  85 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  86
  87 static unsigned int video_debug;
  88 module_param(video_debug, int, 0644);
  89 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  90
  91 /* supported video standards */
  92 static struct em28xx_fmt format[] = {
  93         {
  94                 .name     = "16 bpp YUY2, 4:2:2, packed",
  95                 .fourcc   = V4L2_PIX_FMT_YUYV,
  96                 .depth    = 16,
  97                 .reg      = EM28XX_OUTFMT_YUV422_Y0UY1V,
  98         }, {
  99                 .name     = "16 bpp RGB 565, LE",
 100                 .fourcc   = V4L2_PIX_FMT_RGB565,
 101                 .depth    = 16,
 102                 .reg      = EM28XX_OUTFMT_RGB_16_656,
 103         }, {
 104                 .name     = "8 bpp Bayer BGBG..GRGR",
 105                 .fourcc   = V4L2_PIX_FMT_SBGGR8,
 106                 .depth    = 8,
 107                 .reg      = EM28XX_OUTFMT_RGB_8_BGBG,
 108         }, {
 109                 .name     = "8 bpp Bayer GRGR..BGBG",
 110                 .fourcc   = V4L2_PIX_FMT_SGRBG8,
 111                 .depth    = 8,
 112                 .reg      = EM28XX_OUTFMT_RGB_8_GRGR,
 113         }, {
 114                 .name     = "8 bpp Bayer GBGB..RGRG",
 115                 .fourcc   = V4L2_PIX_FMT_SGBRG8,
 116                 .depth    = 8,
 117                 .reg      = EM28XX_OUTFMT_RGB_8_GBGB,
 118         }, {
 119                 .name     = "12 bpp YUV411",
 120                 .fourcc   = V4L2_PIX_FMT_YUV411P,
 121                 .depth    = 12,
 122                 .reg      = EM28XX_OUTFMT_YUV411,
 123         },
 124 };
 125
 126 /* supported controls */
 127 /* Common to all boards */
 128 static struct v4l2_queryctrl ac97_qctrl[] = {
 129         {
 130                 .id = V4L2_CID_AUDIO_VOLUME,
 131                 .type = V4L2_CTRL_TYPE_INTEGER,
 132                 .name = "Volume",
 133                 .minimum = 0x0,
 134                 .maximum = 0x1f,
 135                 .step = 0x1,
 136                 .default_value = 0x1f,
 137                 .flags = V4L2_CTRL_FLAG_SLIDER,
 138         }, {
 139                 .id = V4L2_CID_AUDIO_MUTE,
 140                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 141                 .name = "Mute",
 142                 .minimum = 0,
 143                 .maximum = 1,
 144                 .step = 1,
 145                 .default_value = 1,
 146                 .flags = 0,
 147         }
 148 };
 149
 150 /* ------------------------------------------------------------------
 151         DMA and thread functions
 152    ------------------------------------------------------------------*/
 153
 154 /*
 155  * Announces that a buffer were filled and request the next
 156  */
 157 static inline void buffer_filled(struct em28xx *dev,
 158                                   struct em28xx_dmaqueue *dma_q,
 159                                   struct em28xx_buffer *buf)
 160 {
 161         /* Advice that buffer was filled */
 162         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 163         buf->vb.state = VIDEOBUF_DONE;
 164         buf->vb.field_count++;
 165         do_gettimeofday(&buf->vb.ts);
 166
 167         dev->isoc_ctl.vid_buf = NULL;
 168
 169         list_del(&buf->vb.queue);
 170         wake_up(&buf->vb.done);
 171 }
 172
 173 static inline void vbi_buffer_filled(struct em28xx *dev,
 174                                      struct em28xx_dmaqueue *dma_q,
 175                                      struct em28xx_buffer *buf)
 176 {
 177         /* Advice that buffer was filled */
 178         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 179
 180         buf->vb.state = VIDEOBUF_DONE;
 181         buf->vb.field_count++;
 182         do_gettimeofday(&buf->vb.ts);
 183
 184         dev->isoc_ctl.vbi_buf = NULL;
 185
 186         list_del(&buf->vb.queue);
 187         wake_up(&buf->vb.done);
 188 }
 189
 190 /*
 191  * Identify the buffer header type and properly handles
 192  */
 193 static void em28xx_copy_video(struct em28xx *dev,
 194                               struct em28xx_dmaqueue  *dma_q,
 195                               struct em28xx_buffer *buf,
 196                               unsigned char *p,
 197                               unsigned char *outp, unsigned long len)
 198 {
 199         void *fieldstart, *startwrite, *startread;
 200         int  linesdone, currlinedone, offset, lencopy, remain;
 201         int bytesperline = dev->width << 1;
 202
 203         if (dma_q->pos + len > buf->vb.size)
 204                 len = buf->vb.size - dma_q->pos;
 205
 206         startread = p;
 207         remain = len;
 208
 209         if (dev->progressive)
 210                 fieldstart = outp;
 211         else {
 212                 /* Interlaces two half frames */
 213                 if (buf->top_field)
 214                         fieldstart = outp;
 215                 else
 216                         fieldstart = outp + bytesperline;
 217         }
 218
 219         linesdone = dma_q->pos / bytesperline;
 220         currlinedone = dma_q->pos % bytesperline;
 221
 222         if (dev->progressive)
 223                 offset = linesdone * bytesperline + currlinedone;
 224         else
 225                 offset = linesdone * bytesperline * 2 + currlinedone;
 226
 227         startwrite = fieldstart + offset;
 228         lencopy = bytesperline - currlinedone;
 229         lencopy = lencopy > remain ? remain : lencopy;
 230
 231         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 232                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 233                                ((char *)startwrite + lencopy) -
 234                                ((char *)outp + buf->vb.size));
 235                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
 236                 lencopy = remain;
 237         }
 238         if (lencopy <= 0)
 239                 return;
 240         memcpy(startwrite, startread, lencopy);
 241
 242         remain -= lencopy;
 243
 244         while (remain > 0) {
 245                 startwrite += lencopy + bytesperline;
 246                 startread += lencopy;
 247                 if (bytesperline > remain)
 248                         lencopy = remain;
 249                 else
 250                         lencopy = bytesperline;
 251
 252                 if ((char *)startwrite + lencopy > (char *)outp +
 253                     buf->vb.size) {
 254                         em28xx_isocdbg("Overflow of %zi bytes past buffer end"
 255                                        "(2)\n",
 256                                        ((char *)startwrite + lencopy) -
 257                                        ((char *)outp + buf->vb.size));
 258                         lencopy = remain = (char *)outp + buf->vb.size -
 259                                            (char *)startwrite;
 260                 }
 261                 if (lencopy <= 0)
 262                         break;
 263
 264                 memcpy(startwrite, startread, lencopy);
 265
 266                 remain -= lencopy;
 267         }
 268
 269         dma_q->pos += len;
 270 }
 271
 272 static void em28xx_copy_vbi(struct em28xx *dev,
 273                               struct em28xx_dmaqueue  *dma_q,
 274                               struct em28xx_buffer *buf,
 275                               unsigned char *p,
 276                               unsigned char *outp, unsigned long len)
 277 {
 278         void *startwrite, *startread;
 279         int  offset;
 280         int bytesperline;
 281
 282         if (dev == NULL) {
 283                 em28xx_isocdbg("dev is null\n");
 284                 return;
 285         }
 286         bytesperline = dev->vbi_width;
 287
 288         if (dma_q == NULL) {
 289                 em28xx_isocdbg("dma_q is null\n");
 290                 return;
 291         }
 292         if (buf == NULL) {
 293                 return;
 294         }
 295         if (p == NULL) {
 296                 em28xx_isocdbg("p is null\n");
 297                 return;
 298         }
 299         if (outp == NULL) {
 300                 em28xx_isocdbg("outp is null\n");
 301                 return;
 302         }
 303
 304         if (dma_q->pos + len > buf->vb.size)
 305                 len = buf->vb.size - dma_q->pos;
 306
 307         startread = p;
 308
 309         startwrite = outp + dma_q->pos;
 310         offset = dma_q->pos;
 311
 312         /* Make sure the bottom field populates the second half of the frame */
 313         if (buf->top_field == 0) {
 314                 startwrite += bytesperline * dev->vbi_height;
 315                 offset += bytesperline * dev->vbi_height;
 316         }
 317
 318         memcpy(startwrite, startread, len);
 319         dma_q->pos += len;
 320 }
 321
 322 static inline void print_err_status(struct em28xx *dev,
 323                                      int packet, int status)
 324 {
 325         char *errmsg = "Unknown";
 326
 327         switch (status) {
 328         case -ENOENT:
 329                 errmsg = "unlinked synchronuously";
 330                 break;
 331         case -ECONNRESET:
 332                 errmsg = "unlinked asynchronuously";
 333                 break;
 334         case -ENOSR:
 335                 errmsg = "Buffer error (overrun)";
 336                 break;
 337         case -EPIPE:
 338                 errmsg = "Stalled (device not responding)";
 339                 break;
 340         case -EOVERFLOW:
 341                 errmsg = "Babble (bad cable?)";
 342                 break;
 343         case -EPROTO:
 344                 errmsg = "Bit-stuff error (bad cable?)";
 345                 break;
 346         case -EILSEQ:
 347                 errmsg = "CRC/Timeout (could be anything)";
 348                 break;
 349         case -ETIME:
 350                 errmsg = "Device does not respond";
 351                 break;
 352         }
 353         if (packet < 0) {
 354                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 355         } else {
 356                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 357                                packet, status, errmsg);
 358         }
 359 }
 360
 361 /*
 362  * video-buf generic routine to get the next available buffer
 363  */
 364 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 365                                           struct em28xx_buffer **buf)
 366 {
 367         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 368         char *outp;
 369
 370         if (list_empty(&dma_q->active)) {
 371                 em28xx_isocdbg("No active queue to serve\n");
 372                 dev->isoc_ctl.vid_buf = NULL;
 373                 *buf = NULL;
 374                 return;
 375         }
 376
 377         /* Get the next buffer */
 378         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 379
 380         /* Cleans up buffer - Useful for testing for frame/URB loss */
 381         outp = videobuf_to_vmalloc(&(*buf)->vb);
 382         memset(outp, 0, (*buf)->vb.size);
 383
 384         dev->isoc_ctl.vid_buf = *buf;
 385
 386         return;
 387 }
 388
 389 /*
 390  * video-buf generic routine to get the next available VBI buffer
 391  */
 392 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 393                                     struct em28xx_buffer **buf)
 394 {
 395         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 396         char *outp;
 397
 398         if (list_empty(&dma_q->active)) {
 399                 em28xx_isocdbg("No active queue to serve\n");
 400                 dev->isoc_ctl.vbi_buf = NULL;
 401                 *buf = NULL;
 402                 return;
 403         }
 404
 405         /* Get the next buffer */
 406         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 407         /* Cleans up buffer - Useful for testing for frame/URB loss */
 408         outp = videobuf_to_vmalloc(&(*buf)->vb);
 409         memset(outp, 0x00, (*buf)->vb.size);
 410
 411         dev->isoc_ctl.vbi_buf = *buf;
 412
 413         return;
 414 }
 415
 416 /*
 417  * Controls the isoc copy of each urb packet
 418  */
 419 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 420 {
 421         struct em28xx_buffer    *buf;
 422         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 423         unsigned char *outp = NULL;
 424         int i, len = 0, rc = 1;
 425         unsigned char *p;
 426
 427         if (!dev)
 428                 return 0;
 429
 430         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 431                 return 0;
 432
 433         if (urb->status < 0) {
 434                 print_err_status(dev, -1, urb->status);
 435                 if (urb->status == -ENOENT)
 436                         return 0;
 437         }
 438
 439         buf = dev->isoc_ctl.vid_buf;
 440         if (buf != NULL)
 441                 outp = videobuf_to_vmalloc(&buf->vb);
 442
 443         for (i = 0; i < urb->number_of_packets; i++) {
 444                 int status = urb->iso_frame_desc[i].status;
 445
 446                 if (status < 0) {
 447                         print_err_status(dev, i, status);
 448                         if (urb->iso_frame_desc[i].status != -EPROTO)
 449                                 continue;
 450                 }
 451
 452                 len = urb->iso_frame_desc[i].actual_length - 4;
 453
 454                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 455                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 456                         continue;
 457                 }
 458                 if (urb->iso_frame_desc[i].actual_length >
 459                                                 dev->max_pkt_size) {
 460                         em28xx_isocdbg("packet bigger than packet size");
 461                         continue;
 462                 }
 463
 464                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 465
 466                 /* FIXME: incomplete buffer checks where removed to make
 467                    logic simpler. Impacts of those changes should be evaluated
 468                  */
 469                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 470                         em28xx_isocdbg("VBI HEADER!!!\n");
 471                         /* FIXME: Should add vbi copy */
 472                         continue;
 473                 }
 474                 if (p[0] == 0x22 && p[1] == 0x5a) {
 475                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 476                                        len, (p[2] & 1) ? "odd" : "even");
 477
 478                         if (dev->progressive || !(p[2] & 1)) {
 479                                 if (buf != NULL)
 480                                         buffer_filled(dev, dma_q, buf);
 481                                 get_next_buf(dma_q, &buf);
 482                                 if (buf == NULL)
 483                                         outp = NULL;
 484                                 else
 485                                         outp = videobuf_to_vmalloc(&buf->vb);
 486                         }
 487
 488                         if (buf != NULL) {
 489                                 if (p[2] & 1)
 490                                         buf->top_field = 0;
 491                                 else
 492                                         buf->top_field = 1;
 493                         }
 494
 495                         dma_q->pos = 0;
 496                 }
 497                 if (buf != NULL) {
 498                         if (p[0] != 0x88 && p[0] != 0x22) {
 499                                 em28xx_isocdbg("frame is not complete\n");
 500                                 len += 4;
 501                         } else {
 502                                 p += 4;
 503                         }
 504                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 505                 }
 506         }
 507         return rc;
 508 }
 509
 510 /* Version of isoc handler that takes into account a mixture of video and
 511    VBI data */
 512 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 513 {
 514         struct em28xx_buffer    *buf, *vbi_buf;
 515         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 516         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 517         unsigned char *outp = NULL;
 518         unsigned char *vbioutp = NULL;
 519         int i, len = 0, rc = 1;
 520         unsigned char *p;
 521         int vbi_size;
 522
 523         if (!dev)
 524                 return 0;
 525
 526         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 527                 return 0;
 528
 529         if (urb->status < 0) {
 530                 print_err_status(dev, -1, urb->status);
 531                 if (urb->status == -ENOENT)
 532                         return 0;
 533         }
 534
 535         buf = dev->isoc_ctl.vid_buf;
 536         if (buf != NULL)
 537                 outp = videobuf_to_vmalloc(&buf->vb);
 538
 539         vbi_buf = dev->isoc_ctl.vbi_buf;
 540         if (vbi_buf != NULL)
 541                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 542
 543         for (i = 0; i < urb->number_of_packets; i++) {
 544                 int status = urb->iso_frame_desc[i].status;
 545
 546                 if (status < 0) {
 547                         print_err_status(dev, i, status);
 548                         if (urb->iso_frame_desc[i].status != -EPROTO)
 549                                 continue;
 550                 }
 551
 552                 len = urb->iso_frame_desc[i].actual_length;
 553                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 554                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 555                         continue;
 556                 }
 557                 if (urb->iso_frame_desc[i].actual_length >
 558                                                 dev->max_pkt_size) {
 559                         em28xx_isocdbg("packet bigger than packet size");
 560                         continue;
 561                 }
 562
 563                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 564
 565                 /* capture type 0 = vbi start
 566                    capture type 1 = video start
 567                    capture type 2 = video in progress */
 568                 if (p[0] == 0x33 && p[1] == 0x95) {
 569                         dev->capture_type = 0;
 570                         dev->vbi_read = 0;
 571                         em28xx_isocdbg("VBI START HEADER!!!\n");
 572                         dev->cur_field = p[2];
 573                         p += 4;
 574                         len -= 4;
 575                 } else if (p[0] == 0x88 && p[1] == 0x88 &&
 576                            p[2] == 0x88 && p[3] == 0x88) {
 577                         /* continuation */
 578                         p += 4;
 579                         len -= 4;
 580                 } else if (p[0] == 0x22 && p[1] == 0x5a) {
 581                         /* start video */
 582                         p += 4;
 583                         len -= 4;
 584                 }
 585
 586                 vbi_size = dev->vbi_width * dev->vbi_height;
 587
 588                 if (dev->capture_type == 0) {
 589                         if (dev->vbi_read >= vbi_size) {
 590                                 /* We've already read all the VBI data, so
 591                                    treat the rest as video */
 592                                 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
 593                         } else if ((dev->vbi_read + len) < vbi_size) {
 594                                 /* This entire frame is VBI data */
 595                                 if (dev->vbi_read == 0 &&
 596                                     (!(dev->cur_field & 1))) {
 597                                         /* Brand new frame */
 598                                         if (vbi_buf != NULL)
 599                                                 vbi_buffer_filled(dev,
 600                                                                   vbi_dma_q,
 601                                                                   vbi_buf);
 602                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 603                                         if (vbi_buf == NULL)
 604                                                 vbioutp = NULL;
 605                                         else
 606                                                 vbioutp = videobuf_to_vmalloc(
 607                                                         &vbi_buf->vb);
 608                                 }
 609
 610                                 if (dev->vbi_read == 0) {
 611                                         vbi_dma_q->pos = 0;
 612                                         if (vbi_buf != NULL) {
 613                                                 if (dev->cur_field & 1)
 614                                                         vbi_buf->top_field = 0;
 615                                                 else
 616                                                         vbi_buf->top_field = 1;
 617                                         }
 618                                 }
 619
 620                                 dev->vbi_read += len;
 621                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 622                                                 vbioutp, len);
 623                         } else {
 624                                 /* Some of this frame is VBI data and some is
 625                                    video data */
 626                                 int vbi_data_len = vbi_size - dev->vbi_read;
 627                                 dev->vbi_read += vbi_data_len;
 628                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 629                                                 vbioutp, vbi_data_len);
 630                                 dev->capture_type = 1;
 631                                 p += vbi_data_len;
 632                                 len -= vbi_data_len;
 633                         }
 634                 }
 635
 636                 if (dev->capture_type == 1) {
 637                         dev->capture_type = 2;
 638                         if (dev->progressive || !(dev->cur_field & 1)) {
 639                                 if (buf != NULL)
 640                                         buffer_filled(dev, dma_q, buf);
 641                                 get_next_buf(dma_q, &buf);
 642                                 if (buf == NULL)
 643                                         outp = NULL;
 644                                 else
 645                                         outp = videobuf_to_vmalloc(&buf->vb);
 646                         }
 647                         if (buf != NULL) {
 648                                 if (dev->cur_field & 1)
 649                                         buf->top_field = 0;
 650                                 else
 651                                         buf->top_field = 1;
 652                         }
 653
 654                         dma_q->pos = 0;
 655                 }
 656
 657                 if (buf != NULL && dev->capture_type == 2) {
 658                         if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 &&
 659                             p[2] == 0x88 && p[3] == 0x88) {
 660                                 p += 4;
 661                                 len -= 4;
 662                         }
 663                         if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) {
 664                                 em28xx_isocdbg("Video frame %d, len=%i, %s\n",
 665                                                p[2], len, (p[2] & 1) ?
 666                                                "odd" : "even");
 667                                 p += 4;
 668                                 len -= 4;
 669                         }
 670
 671                         if (len > 0)
 672                                 em28xx_copy_video(dev, dma_q, buf, p, outp,
 673                                                   len);
 674                 }
 675         }
 676         return rc;
 677 }
 678
 679
 680 /* ------------------------------------------------------------------
 681         Videobuf operations
 682    ------------------------------------------------------------------*/
 683
 684 static int
 685 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 686 {
 687         struct em28xx_fh *fh = vq->priv_data;
 688         struct em28xx        *dev = fh->dev;
 689         struct v4l2_frequency f;
 690
 691         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
 692                 >> 3;
 693
 694         if (0 == *count)
 695                 *count = EM28XX_DEF_BUF;
 696
 697         if (*count < EM28XX_MIN_BUF)
 698                 *count = EM28XX_MIN_BUF;
 699
 700         /* Ask tuner to go to analog or radio mode */
 701         memset(&f, 0, sizeof(f));
 702         f.frequency = dev->ctl_freq;
 703         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 704
 705         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 706
 707         return 0;
 708 }
 709
 710 /* This is called *without* dev->slock held; please keep it that way */
 711 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 712 {
 713         struct em28xx_fh     *fh  = vq->priv_data;
 714         struct em28xx        *dev = fh->dev;
 715         unsigned long flags = 0;
 716         if (in_interrupt())
 717                 BUG();
 718
 719         /* We used to wait for the buffer to finish here, but this didn't work
 720            because, as we were keeping the state as VIDEOBUF_QUEUED,
 721            videobuf_queue_cancel marked it as finished for us.
 722            (Also, it could wedge forever if the hardware was misconfigured.)
 723
 724            This should be safe; by the time we get here, the buffer isn't
 725            queued anymore. If we ever start marking the buffers as
 726            VIDEOBUF_ACTIVE, it won't be, though.
 727         */
 728         spin_lock_irqsave(&dev->slock, flags);
 729         if (dev->isoc_ctl.vid_buf == buf)
 730                 dev->isoc_ctl.vid_buf = NULL;
 731         spin_unlock_irqrestore(&dev->slock, flags);
 732
 733         videobuf_vmalloc_free(&buf->vb);
 734         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 735 }
 736
 737 static int
 738 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 739                                                 enum v4l2_field field)
 740 {
 741         struct em28xx_fh     *fh  = vq->priv_data;
 742         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 743         struct em28xx        *dev = fh->dev;
 744         int                  rc = 0, urb_init = 0;
 745
 746         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
 747                         + 7) >> 3;
 748
 749         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 750                 return -EINVAL;
 751
 752         buf->vb.width  = dev->width;
 753         buf->vb.height = dev->height;
 754         buf->vb.field  = field;
 755
 756         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 757                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 758                 if (rc < 0)
 759                         goto fail;
 760         }
 761
 762         if (!dev->isoc_ctl.num_bufs)
 763                 urb_init = 1;
 764
 765         if (urb_init) {
 766                 if (em28xx_vbi_supported(dev) == 1)
 767                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 768                                               EM28XX_NUM_BUFS,
 769                                               dev->max_pkt_size,
 770                                               em28xx_isoc_copy_vbi);
 771                 else
 772                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 773                                               EM28XX_NUM_BUFS,
 774                                               dev->max_pkt_size,
 775                                               em28xx_isoc_copy);
 776                 if (rc < 0)
 777                         goto fail;
 778         }
 779
 780         buf->vb.state = VIDEOBUF_PREPARED;
 781         return 0;
 782
 783 fail:
 784         free_buffer(vq, buf);
 785         return rc;
 786 }
 787
 788 static void
 789 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 790 {
 791         struct em28xx_buffer    *buf     = container_of(vb,
 792                                                         struct em28xx_buffer,
 793                                                         vb);
 794         struct em28xx_fh        *fh      = vq->priv_data;
 795         struct em28xx           *dev     = fh->dev;
 796         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 797
 798         buf->vb.state = VIDEOBUF_QUEUED;
 799         list_add_tail(&buf->vb.queue, &vidq->active);
 800
 801 }
 802
 803 static void buffer_release(struct videobuf_queue *vq,
 804                                 struct videobuf_buffer *vb)
 805 {
 806         struct em28xx_buffer   *buf  = container_of(vb,
 807                                                     struct em28xx_buffer,
 808                                                     vb);
 809         struct em28xx_fh       *fh   = vq->priv_data;
 810         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 811
 812         em28xx_isocdbg("em28xx: called buffer_release\n");
 813
 814         free_buffer(vq, buf);
 815 }
 816
 817 static struct videobuf_queue_ops em28xx_video_qops = {
 818         .buf_setup      = buffer_setup,
 819         .buf_prepare    = buffer_prepare,
 820         .buf_queue      = buffer_queue,
 821         .buf_release    = buffer_release,
 822 };
 823
 824 /*********************  v4l2 interface  **************************************/
 825
 826 static void video_mux(struct em28xx *dev, int index)
 827 {
 828         dev->ctl_input = index;
 829         dev->ctl_ainput = INPUT(index)->amux;
 830         dev->ctl_aoutput = INPUT(index)->aout;
 831
 832         if (!dev->ctl_aoutput)
 833                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 834
 835         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 836                         INPUT(index)->vmux, 0, 0);
 837
 838         if (dev->board.has_msp34xx) {
 839                 if (dev->i2s_speed) {
 840                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 841                                 s_i2s_clock_freq, dev->i2s_speed);
 842                 }
 843                 /* Note: this is msp3400 specific */
 844                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 845                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 846         }
 847
 848         if (dev->board.adecoder != EM28XX_NOADECODER) {
 849                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 850                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 851         }
 852
 853         em28xx_audio_analog_set(dev);
 854 }
 855
 856 /* Usage lock check functions */
 857 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 858 {
 859         struct em28xx    *dev = fh->dev;
 860
 861         if (fh->resources & bit)
 862                 /* have it already allocated */
 863                 return 1;
 864
 865         /* is it free? */
 866         if (dev->resources & bit) {
 867                 /* no, someone else uses it */
 868                 return 0;
 869         }
 870         /* it's free, grab it */
 871         fh->resources  |= bit;
 872         dev->resources |= bit;
 873         em28xx_videodbg("res: get %d\n", bit);
 874         return 1;
 875 }
 876
 877 static int res_check(struct em28xx_fh *fh, unsigned int bit)
 878 {
 879         return fh->resources & bit;
 880 }
 881
 882 static int res_locked(struct em28xx *dev, unsigned int bit)
 883 {
 884         return dev->resources & bit;
 885 }
 886
 887 static void res_free(struct em28xx_fh *fh, unsigned int bits)
 888 {
 889         struct em28xx    *dev = fh->dev;
 890
 891         BUG_ON((fh->resources & bits) != bits);
 892
 893         fh->resources  &= ~bits;
 894         dev->resources &= ~bits;
 895         em28xx_videodbg("res: put %d\n", bits);
 896 }
 897
 898 static int get_ressource(struct em28xx_fh *fh)
 899 {
 900         switch (fh->type) {
 901         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 902                 return EM28XX_RESOURCE_VIDEO;
 903         case V4L2_BUF_TYPE_VBI_CAPTURE:
 904                 return EM28XX_RESOURCE_VBI;
 905         default:
 906                 BUG();
 907                 return 0;
 908         }
 909 }
 910
 911 /*
 912  * ac97_queryctrl()
 913  * return the ac97 supported controls
 914  */
 915 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 916 {
 917         int i;
 918
 919         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 920                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 921                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 922                         return 0;
 923                 }
 924         }
 925
 926         /* Control is not ac97 related */
 927         return 1;
 928 }
 929
 930 /*
 931  * ac97_get_ctrl()
 932  * return the current values for ac97 mute and volume
 933  */
 934 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 935 {
 936         switch (ctrl->id) {
 937         case V4L2_CID_AUDIO_MUTE:
 938                 ctrl->value = dev->mute;
 939                 return 0;
 940         case V4L2_CID_AUDIO_VOLUME:
 941                 ctrl->value = dev->volume;
 942                 return 0;
 943         default:
 944                 /* Control is not ac97 related */
 945                 return 1;
 946         }
 947 }
 948
 949 /*
 950  * ac97_set_ctrl()
 951  * set values for ac97 mute and volume
 952  */
 953 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 954 {
 955         int i;
 956
 957         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 958                 if (ctrl->id == ac97_qctrl[i].id)
 959                         goto handle;
 960
 961         /* Announce that hasn't handle it */
 962         return 1;
 963
 964 handle:
 965         if (ctrl->value < ac97_qctrl[i].minimum ||
 966             ctrl->value > ac97_qctrl[i].maximum)
 967                 return -ERANGE;
 968
 969         switch (ctrl->id) {
 970         case V4L2_CID_AUDIO_MUTE:
 971                 dev->mute = ctrl->value;
 972                 break;
 973         case V4L2_CID_AUDIO_VOLUME:
 974                 dev->volume = ctrl->value;
 975                 break;
 976         }
 977
 978         return em28xx_audio_analog_set(dev);
 979 }
 980
 981 static int check_dev(struct em28xx *dev)
 982 {
 983         if (dev->state & DEV_DISCONNECTED) {
 984                 em28xx_errdev("v4l2 ioctl: device not present\n");
 985                 return -ENODEV;
 986         }
 987
 988         if (dev->state & DEV_MISCONFIGURED) {
 989                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 990                               "close and open it again\n");
 991                 return -EIO;
 992         }
 993         return 0;
 994 }
 995
 996 static void get_scale(struct em28xx *dev,
 997                         unsigned int width, unsigned int height,
 998                         unsigned int *hscale, unsigned int *vscale)
 999 {
1000         unsigned int          maxw = norm_maxw(dev);
1001         unsigned int          maxh = norm_maxh(dev);
1002
1003         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1004         if (*hscale >= 0x4000)
1005                 *hscale = 0x3fff;
1006
1007         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1008         if (*vscale >= 0x4000)
1009                 *vscale = 0x3fff;
1010 }
1011
1012 /* ------------------------------------------------------------------
1013         IOCTL vidioc handling
1014    ------------------------------------------------------------------*/
1015
1016 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1017                                         struct v4l2_format *f)
1018 {
1019         struct em28xx_fh      *fh  = priv;
1020         struct em28xx         *dev = fh->dev;
1021
1022         f->fmt.pix.width = dev->width;
1023         f->fmt.pix.height = dev->height;
1024         f->fmt.pix.pixelformat = dev->format->fourcc;
1025         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1026         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1027         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1028
1029         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1030         if (dev->progressive)
1031                 f->fmt.pix.field = V4L2_FIELD_NONE;
1032         else
1033                 f->fmt.pix.field = dev->interlaced ?
1034                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1035         return 0;
1036 }
1037
1038 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1039 {
1040         unsigned int i;
1041
1042         for (i = 0; i < ARRAY_SIZE(format); i++)
1043                 if (format[i].fourcc == fourcc)
1044                         return &format[i];
1045
1046         return NULL;
1047 }
1048
1049 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1050                         struct v4l2_format *f)
1051 {
1052         struct em28xx_fh      *fh    = priv;
1053         struct em28xx         *dev   = fh->dev;
1054         unsigned int          width  = f->fmt.pix.width;
1055         unsigned int          height = f->fmt.pix.height;
1056         unsigned int          maxw   = norm_maxw(dev);
1057         unsigned int          maxh   = norm_maxh(dev);
1058         unsigned int          hscale, vscale;
1059         struct em28xx_fmt     *fmt;
1060
1061         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1062         if (!fmt) {
1063                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1064                                 f->fmt.pix.pixelformat);
1065                 return -EINVAL;
1066         }
1067
1068         if (dev->board.is_em2800) {
1069                 /* the em2800 can only scale down to 50% */
1070                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1071                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1072         } else {
1073                 /* width must even because of the YUYV format
1074                    height must be even because of interlacing */
1075                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1076                                       1, 0);
1077         }
1078
1079         get_scale(dev, width, height, &hscale, &vscale);
1080
1081         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1082         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1083
1084         f->fmt.pix.width = width;
1085         f->fmt.pix.height = height;
1086         f->fmt.pix.pixelformat = fmt->fourcc;
1087         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1088         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1089         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1090         if (dev->progressive)
1091                 f->fmt.pix.field = V4L2_FIELD_NONE;
1092         else
1093                 f->fmt.pix.field = dev->interlaced ?
1094                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1095
1096         return 0;
1097 }
1098
1099 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1100                                    unsigned width, unsigned height)
1101 {
1102         struct em28xx_fmt     *fmt;
1103
1104         fmt = format_by_fourcc(fourcc);
1105         if (!fmt)
1106                 return -EINVAL;
1107
1108         dev->format = fmt;
1109         dev->width  = width;
1110         dev->height = height;
1111
1112         /* set new image size */
1113         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1114
1115         em28xx_set_alternate(dev);
1116         em28xx_resolution_set(dev);
1117
1118         return 0;
1119 }
1120
1121 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1122                         struct v4l2_format *f)
1123 {
1124         struct em28xx_fh      *fh  = priv;
1125         struct em28xx         *dev = fh->dev;
1126         int                   rc;
1127
1128         rc = check_dev(dev);
1129         if (rc < 0)
1130                 return rc;
1131
1132         vidioc_try_fmt_vid_cap(file, priv, f);
1133
1134         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1135                 em28xx_errdev("%s queue busy\n", __func__);
1136                 return -EBUSY;
1137         }
1138
1139         return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1140                                 f->fmt.pix.width, f->fmt.pix.height);
1141 }
1142
1143 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1144 {
1145         struct em28xx_fh   *fh  = priv;
1146         struct em28xx      *dev = fh->dev;
1147         int                rc;
1148
1149         rc = check_dev(dev);
1150         if (rc < 0)
1151                 return rc;
1152
1153         *norm = dev->norm;
1154
1155         return 0;
1156 }
1157
1158 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1159 {
1160         struct em28xx_fh   *fh  = priv;
1161         struct em28xx      *dev = fh->dev;
1162         struct v4l2_format f;
1163         int                rc;
1164
1165         rc = check_dev(dev);
1166         if (rc < 0)
1167                 return rc;
1168
1169         dev->norm = *norm;
1170
1171         /* Adjusts width/height, if needed */
1172         f.fmt.pix.width = dev->width;
1173         f.fmt.pix.height = dev->height;
1174         vidioc_try_fmt_vid_cap(file, priv, &f);
1175
1176         /* set new image size */
1177         dev->width = f.fmt.pix.width;
1178         dev->height = f.fmt.pix.height;
1179         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1180
1181         em28xx_resolution_set(dev);
1182         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1183
1184         return 0;
1185 }
1186
1187 static int vidioc_g_parm(struct file *file, void *priv,
1188                          struct v4l2_streamparm *p)
1189 {
1190         struct em28xx_fh   *fh  = priv;
1191         struct em28xx      *dev = fh->dev;
1192         int rc = 0;
1193
1194         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1195                 return -EINVAL;
1196
1197         if (dev->board.is_webcam)
1198                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1199                                                 video, g_parm, p);
1200         else
1201                 v4l2_video_std_frame_period(dev->norm,
1202                                                  &p->parm.capture.timeperframe);
1203
1204         return rc;
1205 }
1206
1207 static int vidioc_s_parm(struct file *file, void *priv,
1208                          struct v4l2_streamparm *p)
1209 {
1210         struct em28xx_fh   *fh  = priv;
1211         struct em28xx      *dev = fh->dev;
1212
1213         if (!dev->board.is_webcam)
1214                 return -EINVAL;
1215
1216         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1217                 return -EINVAL;
1218
1219         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1220 }
1221
1222 static const char *iname[] = {
1223         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1224         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1225         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1226         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1227         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1228         [EM28XX_VMUX_TELEVISION] = "Television",
1229         [EM28XX_VMUX_CABLE]      = "Cable TV",
1230         [EM28XX_VMUX_DVB]        = "DVB",
1231         [EM28XX_VMUX_DEBUG]      = "for debug only",
1232 };
1233
1234 static int vidioc_enum_input(struct file *file, void *priv,
1235                                 struct v4l2_input *i)
1236 {
1237         struct em28xx_fh   *fh  = priv;
1238         struct em28xx      *dev = fh->dev;
1239         unsigned int       n;
1240
1241         n = i->index;
1242         if (n >= MAX_EM28XX_INPUT)
1243                 return -EINVAL;
1244         if (0 == INPUT(n)->type)
1245                 return -EINVAL;
1246
1247         i->index = n;
1248         i->type = V4L2_INPUT_TYPE_CAMERA;
1249
1250         strcpy(i->name, iname[INPUT(n)->type]);
1251
1252         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1253                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1254                 i->type = V4L2_INPUT_TYPE_TUNER;
1255
1256         i->std = dev->vdev->tvnorms;
1257
1258         return 0;
1259 }
1260
1261 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1262 {
1263         struct em28xx_fh   *fh  = priv;
1264         struct em28xx      *dev = fh->dev;
1265
1266         *i = dev->ctl_input;
1267
1268         return 0;
1269 }
1270
1271 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1272 {
1273         struct em28xx_fh   *fh  = priv;
1274         struct em28xx      *dev = fh->dev;
1275         int                rc;
1276
1277         rc = check_dev(dev);
1278         if (rc < 0)
1279                 return rc;
1280
1281         if (i >= MAX_EM28XX_INPUT)
1282                 return -EINVAL;
1283         if (0 == INPUT(i)->type)
1284                 return -EINVAL;
1285
1286         dev->ctl_input = i;
1287
1288         video_mux(dev, dev->ctl_input);
1289         return 0;
1290 }
1291
1292 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1293 {
1294         struct em28xx_fh   *fh    = priv;
1295         struct em28xx      *dev   = fh->dev;
1296
1297         if (!dev->audio_mode.has_audio)
1298                 return -EINVAL;
1299
1300         switch (a->index) {
1301         case EM28XX_AMUX_VIDEO:
1302                 strcpy(a->name, "Television");
1303                 break;
1304         case EM28XX_AMUX_LINE_IN:
1305                 strcpy(a->name, "Line In");
1306                 break;
1307         case EM28XX_AMUX_VIDEO2:
1308                 strcpy(a->name, "Television alt");
1309                 break;
1310         case EM28XX_AMUX_PHONE:
1311                 strcpy(a->name, "Phone");
1312                 break;
1313         case EM28XX_AMUX_MIC:
1314                 strcpy(a->name, "Mic");
1315                 break;
1316         case EM28XX_AMUX_CD:
1317                 strcpy(a->name, "CD");
1318                 break;
1319         case EM28XX_AMUX_AUX:
1320                 strcpy(a->name, "Aux");
1321                 break;
1322         case EM28XX_AMUX_PCM_OUT:
1323                 strcpy(a->name, "PCM");
1324                 break;
1325         default:
1326                 return -EINVAL;
1327         }
1328
1329         a->index = dev->ctl_ainput;
1330         a->capability = V4L2_AUDCAP_STEREO;
1331
1332         return 0;
1333 }
1334
1335 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1336 {
1337         struct em28xx_fh   *fh  = priv;
1338         struct em28xx      *dev = fh->dev;
1339
1340
1341         if (!dev->audio_mode.has_audio)
1342                 return -EINVAL;
1343
1344         if (a->index >= MAX_EM28XX_INPUT)
1345                 return -EINVAL;
1346         if (0 == INPUT(a->index)->type)
1347                 return -EINVAL;
1348
1349         dev->ctl_ainput = INPUT(a->index)->amux;
1350         dev->ctl_aoutput = INPUT(a->index)->aout;
1351
1352         if (!dev->ctl_aoutput)
1353                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1354
1355         return 0;
1356 }
1357
1358 static int vidioc_queryctrl(struct file *file, void *priv,
1359                                 struct v4l2_queryctrl *qc)
1360 {
1361         struct em28xx_fh      *fh  = priv;
1362         struct em28xx         *dev = fh->dev;
1363         int                   id  = qc->id;
1364         int                   rc;
1365
1366         rc = check_dev(dev);
1367         if (rc < 0)
1368                 return rc;
1369
1370         memset(qc, 0, sizeof(*qc));
1371
1372         qc->id = id;
1373
1374         /* enumerate AC97 controls */
1375         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1376                 rc = ac97_queryctrl(qc);
1377                 if (!rc)
1378                         return 0;
1379         }
1380
1381         /* enumerate V4L2 device controls */
1382         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1383
1384         if (qc->type)
1385                 return 0;
1386         else
1387                 return -EINVAL;
1388 }
1389
1390 /*
1391  * FIXME: This is an indirect way to check if a control exists at a
1392  * subdev. Instead of that hack, maybe the better would be to change all
1393  * subdevs to return -ENOIOCTLCMD, if an ioctl is not supported.
1394  */
1395 static int check_subdev_ctrl(struct em28xx *dev, int id)
1396 {
1397         struct v4l2_queryctrl qc;
1398
1399         memset(&qc, 0, sizeof(qc));
1400         qc.id = id;
1401
1402         /* enumerate V4L2 device controls */
1403         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc);
1404
1405         if (qc.type)
1406                 return 0;
1407         else
1408                 return -EINVAL;
1409 }
1410
1411 static int vidioc_g_ctrl(struct file *file, void *priv,
1412                                 struct v4l2_control *ctrl)
1413 {
1414         struct em28xx_fh      *fh  = priv;
1415         struct em28xx         *dev = fh->dev;
1416         int                   rc;
1417
1418         rc = check_dev(dev);
1419         if (rc < 0)
1420                 return rc;
1421         rc = 0;
1422
1423         /* Set an AC97 control */
1424         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1425                 rc = ac97_get_ctrl(dev, ctrl);
1426         else
1427                 rc = 1;
1428
1429         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1430         if (rc == 1) {
1431                 if (check_subdev_ctrl(dev, ctrl->id))
1432                         return -EINVAL;
1433
1434                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1435                 rc = 0;
1436         }
1437
1438         return rc;
1439 }
1440
1441 static int vidioc_s_ctrl(struct file *file, void *priv,
1442                                 struct v4l2_control *ctrl)
1443 {
1444         struct em28xx_fh      *fh  = priv;
1445         struct em28xx         *dev = fh->dev;
1446         int                   rc;
1447
1448         rc = check_dev(dev);
1449         if (rc < 0)
1450                 return rc;
1451
1452         /* Set an AC97 control */
1453         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1454                 rc = ac97_set_ctrl(dev, ctrl);
1455         else
1456                 rc = 1;
1457
1458         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1459         if (rc == 1) {
1460                 rc = check_subdev_ctrl(dev, ctrl->id);
1461                 if (!rc)
1462                         v4l2_device_call_all(&dev->v4l2_dev, 0,
1463                                              core, s_ctrl, ctrl);
1464                 /*
1465                  * In the case of non-AC97 volume controls, we still need
1466                  * to do some setups at em28xx, in order to mute/unmute
1467                  * and to adjust audio volume. However, the value ranges
1468                  * should be checked by the corresponding V4L subdriver.
1469                  */
1470                 switch (ctrl->id) {
1471                 case V4L2_CID_AUDIO_MUTE:
1472                         dev->mute = ctrl->value;
1473                         rc = em28xx_audio_analog_set(dev);
1474                         break;
1475                 case V4L2_CID_AUDIO_VOLUME:
1476                         dev->volume = ctrl->value;
1477                         rc = em28xx_audio_analog_set(dev);
1478                 }
1479         }
1480         return (rc < 0) ? rc : 0;
1481 }
1482
1483 static int vidioc_g_tuner(struct file *file, void *priv,
1484                                 struct v4l2_tuner *t)
1485 {
1486         struct em28xx_fh      *fh  = priv;
1487         struct em28xx         *dev = fh->dev;
1488         int                   rc;
1489
1490         rc = check_dev(dev);
1491         if (rc < 0)
1492                 return rc;
1493
1494         if (0 != t->index)
1495                 return -EINVAL;
1496
1497         strcpy(t->name, "Tuner");
1498         t->type = V4L2_TUNER_ANALOG_TV;
1499
1500         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1501         return 0;
1502 }
1503
1504 static int vidioc_s_tuner(struct file *file, void *priv,
1505                                 struct v4l2_tuner *t)
1506 {
1507         struct em28xx_fh      *fh  = priv;
1508         struct em28xx         *dev = fh->dev;
1509         int                   rc;
1510
1511         rc = check_dev(dev);
1512         if (rc < 0)
1513                 return rc;
1514
1515         if (0 != t->index)
1516                 return -EINVAL;
1517
1518         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1519         return 0;
1520 }
1521
1522 static int vidioc_g_frequency(struct file *file, void *priv,
1523                                 struct v4l2_frequency *f)
1524 {
1525         struct em28xx_fh      *fh  = priv;
1526         struct em28xx         *dev = fh->dev;
1527
1528         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1529         f->frequency = dev->ctl_freq;
1530         return 0;
1531 }
1532
1533 static int vidioc_s_frequency(struct file *file, void *priv,
1534                                 struct v4l2_frequency *f)
1535 {
1536         struct em28xx_fh      *fh  = priv;
1537         struct em28xx         *dev = fh->dev;
1538         int                   rc;
1539
1540         rc = check_dev(dev);
1541         if (rc < 0)
1542                 return rc;
1543
1544         if (0 != f->tuner)
1545                 return -EINVAL;
1546
1547         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1548                 return -EINVAL;
1549         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1550                 return -EINVAL;
1551
1552         dev->ctl_freq = f->frequency;
1553         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1554
1555         return 0;
1556 }
1557
1558 #ifdef CONFIG_VIDEO_ADV_DEBUG
1559 static int em28xx_reg_len(int reg)
1560 {
1561         switch (reg) {
1562         case EM28XX_R40_AC97LSB:
1563         case EM28XX_R30_HSCALELOW:
1564         case EM28XX_R32_VSCALELOW:
1565                 return 2;
1566         default:
1567                 return 1;
1568         }
1569 }
1570
1571 static int vidioc_g_chip_ident(struct file *file, void *priv,
1572                struct v4l2_dbg_chip_ident *chip)
1573 {
1574         struct em28xx_fh      *fh  = priv;
1575         struct em28xx         *dev = fh->dev;
1576
1577         chip->ident = V4L2_IDENT_NONE;
1578         chip->revision = 0;
1579
1580         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1581
1582         return 0;
1583 }
1584
1585
1586 static int vidioc_g_register(struct file *file, void *priv,
1587                              struct v4l2_dbg_register *reg)
1588 {
1589         struct em28xx_fh      *fh  = priv;
1590         struct em28xx         *dev = fh->dev;
1591         int ret;
1592
1593         switch (reg->match.type) {
1594         case V4L2_CHIP_MATCH_AC97:
1595                 ret = em28xx_read_ac97(dev, reg->reg);
1596                 if (ret < 0)
1597                         return ret;
1598
1599                 reg->val = ret;
1600                 reg->size = 1;
1601                 return 0;
1602         case V4L2_CHIP_MATCH_I2C_DRIVER:
1603                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1604                 return 0;
1605         case V4L2_CHIP_MATCH_I2C_ADDR:
1606                 /* TODO: is this correct? */
1607                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1608                 return 0;
1609         default:
1610                 if (!v4l2_chip_match_host(&reg->match))
1611                         return -EINVAL;
1612         }
1613
1614         /* Match host */
1615         reg->size = em28xx_reg_len(reg->reg);
1616         if (reg->size == 1) {
1617                 ret = em28xx_read_reg(dev, reg->reg);
1618
1619                 if (ret < 0)
1620                         return ret;
1621
1622                 reg->val = ret;
1623         } else {
1624                 __le16 val = 0;
1625                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1626                                                    reg->reg, (char *)&val, 2);
1627                 if (ret < 0)
1628                         return ret;
1629
1630                 reg->val = le16_to_cpu(val);
1631         }
1632
1633         return 0;
1634 }
1635
1636 static int vidioc_s_register(struct file *file, void *priv,
1637                              struct v4l2_dbg_register *reg)
1638 {
1639         struct em28xx_fh      *fh  = priv;
1640         struct em28xx         *dev = fh->dev;
1641         __le16 buf;
1642
1643         switch (reg->match.type) {
1644         case V4L2_CHIP_MATCH_AC97:
1645                 return em28xx_write_ac97(dev, reg->reg, reg->val);
1646         case V4L2_CHIP_MATCH_I2C_DRIVER:
1647                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1648                 return 0;
1649         case V4L2_CHIP_MATCH_I2C_ADDR:
1650                 /* TODO: is this correct? */
1651                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1652                 return 0;
1653         default:
1654                 if (!v4l2_chip_match_host(&reg->match))
1655                         return -EINVAL;
1656         }
1657
1658         /* Match host */
1659         buf = cpu_to_le16(reg->val);
1660
1661         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1662                                em28xx_reg_len(reg->reg));
1663 }
1664 #endif
1665
1666
1667 static int vidioc_cropcap(struct file *file, void *priv,
1668                                         struct v4l2_cropcap *cc)
1669 {
1670         struct em28xx_fh      *fh  = priv;
1671         struct em28xx         *dev = fh->dev;
1672
1673         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1674                 return -EINVAL;
1675
1676         cc->bounds.left = 0;
1677         cc->bounds.top = 0;
1678         cc->bounds.width = dev->width;
1679         cc->bounds.height = dev->height;
1680         cc->defrect = cc->bounds;
1681         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1682         cc->pixelaspect.denominator = 59;
1683
1684         return 0;
1685 }
1686
1687 static int vidioc_streamon(struct file *file, void *priv,
1688                                         enum v4l2_buf_type type)
1689 {
1690         struct em28xx_fh      *fh  = priv;
1691         struct em28xx         *dev = fh->dev;
1692         int                   rc = -EINVAL;
1693
1694         rc = check_dev(dev);
1695         if (rc < 0)
1696                 return rc;
1697
1698         if (unlikely(type != fh->type))
1699                 return -EINVAL;
1700
1701         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1702                         fh, type, fh->resources, dev->resources);
1703
1704         if (unlikely(!res_get(fh, get_ressource(fh))))
1705                 return -EBUSY;
1706
1707         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1708                 rc = videobuf_streamon(&fh->vb_vidq);
1709         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1710                 rc = videobuf_streamon(&fh->vb_vbiq);
1711
1712         return rc;
1713 }
1714
1715 static int vidioc_streamoff(struct file *file, void *priv,
1716                                         enum v4l2_buf_type type)
1717 {
1718         struct em28xx_fh      *fh  = priv;
1719         struct em28xx         *dev = fh->dev;
1720         int                   rc;
1721
1722         rc = check_dev(dev);
1723         if (rc < 0)
1724                 return rc;
1725
1726         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1727             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1728                 return -EINVAL;
1729         if (type != fh->type)
1730                 return -EINVAL;
1731
1732         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1733                         fh, type, fh->resources, dev->resources);
1734
1735         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1736                 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
1737                         videobuf_streamoff(&fh->vb_vidq);
1738                         res_free(fh, EM28XX_RESOURCE_VIDEO);
1739                 }
1740         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1741                 if (res_check(fh, EM28XX_RESOURCE_VBI)) {
1742                         videobuf_streamoff(&fh->vb_vbiq);
1743                         res_free(fh, EM28XX_RESOURCE_VBI);
1744                 }
1745         }
1746
1747         return 0;
1748 }
1749
1750 static int vidioc_querycap(struct file *file, void  *priv,
1751                                         struct v4l2_capability *cap)
1752 {
1753         struct em28xx_fh      *fh  = priv;
1754         struct em28xx         *dev = fh->dev;
1755
1756         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1757         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1758         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1759
1760         cap->version = EM28XX_VERSION_CODE;
1761
1762         cap->capabilities =
1763                         V4L2_CAP_SLICED_VBI_CAPTURE |
1764                         V4L2_CAP_VIDEO_CAPTURE |
1765                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1766
1767         if (dev->vbi_dev)
1768                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1769
1770         if (dev->audio_mode.has_audio)
1771                 cap->capabilities |= V4L2_CAP_AUDIO;
1772
1773         if (dev->tuner_type != TUNER_ABSENT)
1774                 cap->capabilities |= V4L2_CAP_TUNER;
1775
1776         return 0;
1777 }
1778
1779 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1780                                         struct v4l2_fmtdesc *f)
1781 {
1782         if (unlikely(f->index >= ARRAY_SIZE(format)))
1783                 return -EINVAL;
1784
1785         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1786         f->pixelformat = format[f->index].fourcc;
1787
1788         return 0;
1789 }
1790
1791 /* Sliced VBI ioctls */
1792 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1793                                         struct v4l2_format *f)
1794 {
1795         struct em28xx_fh      *fh  = priv;
1796         struct em28xx         *dev = fh->dev;
1797         int                   rc;
1798
1799         rc = check_dev(dev);
1800         if (rc < 0)
1801                 return rc;
1802
1803         f->fmt.sliced.service_set = 0;
1804         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1805
1806         if (f->fmt.sliced.service_set == 0)
1807                 rc = -EINVAL;
1808
1809         return rc;
1810 }
1811
1812 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1813                         struct v4l2_format *f)
1814 {
1815         struct em28xx_fh      *fh  = priv;
1816         struct em28xx         *dev = fh->dev;
1817         int                   rc;
1818
1819         rc = check_dev(dev);
1820         if (rc < 0)
1821                 return rc;
1822
1823         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1824
1825         if (f->fmt.sliced.service_set == 0)
1826                 return -EINVAL;
1827
1828         return 0;
1829 }
1830
1831 /* RAW VBI ioctls */
1832
1833 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1834                                 struct v4l2_format *format)
1835 {
1836         struct em28xx_fh      *fh  = priv;
1837         struct em28xx         *dev = fh->dev;
1838
1839         format->fmt.vbi.samples_per_line = dev->vbi_width;
1840         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1841         format->fmt.vbi.offset = 0;
1842         format->fmt.vbi.flags = 0;
1843         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1844         format->fmt.vbi.count[0] = dev->vbi_height;
1845         format->fmt.vbi.count[1] = dev->vbi_height;
1846
1847         /* Varies by video standard (NTSC, PAL, etc.) */
1848         if (dev->norm & V4L2_STD_525_60) {
1849                 /* NTSC */
1850                 format->fmt.vbi.start[0] = 10;
1851                 format->fmt.vbi.start[1] = 273;
1852         } else if (dev->norm & V4L2_STD_625_50) {
1853                 /* PAL */
1854                 format->fmt.vbi.start[0] = 6;
1855                 format->fmt.vbi.start[1] = 318;
1856         }
1857
1858         return 0;
1859 }
1860
1861 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1862                                 struct v4l2_format *format)
1863 {
1864         struct em28xx_fh      *fh  = priv;
1865         struct em28xx         *dev = fh->dev;
1866
1867         format->fmt.vbi.samples_per_line = dev->vbi_width;
1868         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1869         format->fmt.vbi.offset = 0;
1870         format->fmt.vbi.flags = 0;
1871         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1872         format->fmt.vbi.count[0] = dev->vbi_height;
1873         format->fmt.vbi.count[1] = dev->vbi_height;
1874
1875         /* Varies by video standard (NTSC, PAL, etc.) */
1876         if (dev->norm & V4L2_STD_525_60) {
1877                 /* NTSC */
1878                 format->fmt.vbi.start[0] = 10;
1879                 format->fmt.vbi.start[1] = 273;
1880         } else if (dev->norm & V4L2_STD_625_50) {
1881                 /* PAL */
1882                 format->fmt.vbi.start[0] = 6;
1883                 format->fmt.vbi.start[1] = 318;
1884         }
1885
1886         return 0;
1887 }
1888
1889 static int vidioc_reqbufs(struct file *file, void *priv,
1890                           struct v4l2_requestbuffers *rb)
1891 {
1892         struct em28xx_fh      *fh  = priv;
1893         struct em28xx         *dev = fh->dev;
1894         int                   rc;
1895
1896         rc = check_dev(dev);
1897         if (rc < 0)
1898                 return rc;
1899
1900         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1901                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1902         else
1903                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1904 }
1905
1906 static int vidioc_querybuf(struct file *file, void *priv,
1907                            struct v4l2_buffer *b)
1908 {
1909         struct em28xx_fh      *fh  = priv;
1910         struct em28xx         *dev = fh->dev;
1911         int                   rc;
1912
1913         rc = check_dev(dev);
1914         if (rc < 0)
1915                 return rc;
1916
1917         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1918                 return videobuf_querybuf(&fh->vb_vidq, b);
1919         else {
1920                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1921                    the videobuf framework, but we probably shouldn't be
1922                    returning a buffer larger than that which was asked for.
1923                    At a minimum, it causes a crash in zvbi since it does
1924                    a memcpy based on the source buffer length */
1925                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1926                 b->length = dev->vbi_width * dev->vbi_height * 2;
1927
1928                 return result;
1929         }
1930 }
1931
1932 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1933 {
1934         struct em28xx_fh      *fh  = priv;
1935         struct em28xx         *dev = fh->dev;
1936         int                   rc;
1937
1938         rc = check_dev(dev);
1939         if (rc < 0)
1940                 return rc;
1941
1942         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1943                 return videobuf_qbuf(&fh->vb_vidq, b);
1944         else
1945                 return videobuf_qbuf(&fh->vb_vbiq, b);
1946 }
1947
1948 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1949 {
1950         struct em28xx_fh      *fh  = priv;
1951         struct em28xx         *dev = fh->dev;
1952         int                   rc;
1953
1954         rc = check_dev(dev);
1955         if (rc < 0)
1956                 return rc;
1957
1958         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1959                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1960                                       O_NONBLOCK);
1961         else
1962                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1963                                       O_NONBLOCK);
1964 }
1965
1966 /* ----------------------------------------------------------- */
1967 /* RADIO ESPECIFIC IOCTLS                                      */
1968 /* ----------------------------------------------------------- */
1969
1970 static int radio_querycap(struct file *file, void  *priv,
1971                           struct v4l2_capability *cap)
1972 {
1973         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1974
1975         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1976         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1977         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1978
1979         cap->version = EM28XX_VERSION_CODE;
1980         cap->capabilities = V4L2_CAP_TUNER;
1981         return 0;
1982 }
1983
1984 static int radio_g_tuner(struct file *file, void *priv,
1985                          struct v4l2_tuner *t)
1986 {
1987         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1988
1989         if (unlikely(t->index > 0))
1990                 return -EINVAL;
1991
1992         strcpy(t->name, "Radio");
1993         t->type = V4L2_TUNER_RADIO;
1994
1995         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1996
1997         return 0;
1998 }
1999
2000 static int radio_enum_input(struct file *file, void *priv,
2001                             struct v4l2_input *i)
2002 {
2003         if (i->index != 0)
2004                 return -EINVAL;
2005         strcpy(i->name, "Radio");
2006         i->type = V4L2_INPUT_TYPE_TUNER;
2007
2008         return 0;
2009 }
2010
2011 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2012 {
2013         if (unlikely(a->index))
2014                 return -EINVAL;
2015
2016         strcpy(a->name, "Radio");
2017         return 0;
2018 }
2019
2020 static int radio_s_tuner(struct file *file, void *priv,
2021                          struct v4l2_tuner *t)
2022 {
2023         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2024
2025         if (0 != t->index)
2026                 return -EINVAL;
2027
2028         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2029
2030         return 0;
2031 }
2032
2033 static int radio_s_audio(struct file *file, void *fh,
2034                          struct v4l2_audio *a)
2035 {
2036         return 0;
2037 }
2038
2039 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2040 {
2041         return 0;
2042 }
2043
2044 static int radio_queryctrl(struct file *file, void *priv,
2045                            struct v4l2_queryctrl *qc)
2046 {
2047         int i;
2048
2049         if (qc->id <  V4L2_CID_BASE ||
2050                 qc->id >= V4L2_CID_LASTP1)
2051                 return -EINVAL;
2052
2053         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2054                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2055                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2056                         return 0;
2057                 }
2058         }
2059
2060         return -EINVAL;
2061 }
2062
2063 /*
2064  * em28xx_v4l2_open()
2065  * inits the device and starts isoc transfer
2066  */
2067 static int em28xx_v4l2_open(struct file *filp)
2068 {
2069         int errCode = 0, radio = 0;
2070         struct video_device *vdev = video_devdata(filp);
2071         struct em28xx *dev = video_drvdata(filp);
2072         enum v4l2_buf_type fh_type = 0;
2073         struct em28xx_fh *fh;
2074         enum v4l2_field field;
2075
2076         switch (vdev->vfl_type) {
2077         case VFL_TYPE_GRABBER:
2078                 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2079                 break;
2080         case VFL_TYPE_VBI:
2081                 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2082                 break;
2083         case VFL_TYPE_RADIO:
2084                 radio = 1;
2085                 break;
2086         }
2087
2088         em28xx_videodbg("open dev=%s type=%s users=%d\n",
2089                         video_device_node_name(vdev), v4l2_type_names[fh_type],
2090                         dev->users);
2091
2092
2093         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2094         if (!fh) {
2095                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2096                 return -ENOMEM;
2097         }
2098         fh->dev = dev;
2099         fh->radio = radio;
2100         fh->type = fh_type;
2101         filp->private_data = fh;
2102
2103         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2104                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2105                 em28xx_set_alternate(dev);
2106                 em28xx_resolution_set(dev);
2107
2108                 /* Needed, since GPIO might have disabled power of
2109                    some i2c device
2110                  */
2111                 em28xx_wake_i2c(dev);
2112
2113         }
2114         if (fh->radio) {
2115                 em28xx_videodbg("video_open: setting radio device\n");
2116                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2117         }
2118
2119         dev->users++;
2120
2121         if (dev->progressive)
2122                 field = V4L2_FIELD_NONE;
2123         else
2124                 field = V4L2_FIELD_INTERLACED;
2125
2126         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2127                                     NULL, &dev->slock,
2128                                     V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2129                                     sizeof(struct em28xx_buffer), fh, &dev->lock);
2130
2131         videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2132                                     NULL, &dev->slock,
2133                                     V4L2_BUF_TYPE_VBI_CAPTURE,
2134                                     V4L2_FIELD_SEQ_TB,
2135                                     sizeof(struct em28xx_buffer), fh, &dev->lock);
2136
2137         return errCode;
2138 }
2139
2140 /*
2141  * em28xx_realease_resources()
2142  * unregisters the v4l2,i2c and usb devices
2143  * called when the device gets disconected or at module unload
2144 */
2145 void em28xx_release_analog_resources(struct em28xx *dev)
2146 {
2147
2148         /*FIXME: I2C IR should be disconnected */
2149
2150         if (dev->radio_dev) {
2151                 if (video_is_registered(dev->radio_dev))
2152                         video_unregister_device(dev->radio_dev);
2153                 else
2154                         video_device_release(dev->radio_dev);
2155                 dev->radio_dev = NULL;
2156         }
2157         if (dev->vbi_dev) {
2158                 em28xx_info("V4L2 device %s deregistered\n",
2159                             video_device_node_name(dev->vbi_dev));
2160                 if (video_is_registered(dev->vbi_dev))
2161                         video_unregister_device(dev->vbi_dev);
2162                 else
2163                         video_device_release(dev->vbi_dev);
2164                 dev->vbi_dev = NULL;
2165         }
2166         if (dev->vdev) {
2167                 em28xx_info("V4L2 device %s deregistered\n",
2168                             video_device_node_name(dev->vdev));
2169                 if (video_is_registered(dev->vdev))
2170                         video_unregister_device(dev->vdev);
2171                 else
2172                         video_device_release(dev->vdev);
2173                 dev->vdev = NULL;
2174         }
2175 }
2176
2177 /*
2178  * em28xx_v4l2_close()
2179  * stops streaming and deallocates all resources allocated by the v4l2
2180  * calls and ioctls
2181  */
2182 static int em28xx_v4l2_close(struct file *filp)
2183 {
2184         struct em28xx_fh *fh  = filp->private_data;
2185         struct em28xx    *dev = fh->dev;
2186         int              errCode;
2187
2188         em28xx_videodbg("users=%d\n", dev->users);
2189
2190         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2191                 videobuf_stop(&fh->vb_vidq);
2192                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2193         }
2194
2195         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2196                 videobuf_stop(&fh->vb_vbiq);
2197                 res_free(fh, EM28XX_RESOURCE_VBI);
2198         }
2199
2200         if (dev->users == 1) {
2201                 /* the device is already disconnect,
2202                    free the remaining resources */
2203                 if (dev->state & DEV_DISCONNECTED) {
2204                         em28xx_release_resources(dev);
2205                         kfree(dev);
2206                         return 0;
2207                 }
2208
2209                 /* Save some power by putting tuner to sleep */
2210                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
2211
2212                 /* do this before setting alternate! */
2213                 em28xx_uninit_isoc(dev);
2214                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2215
2216                 /* set alternate 0 */
2217                 dev->alt = 0;
2218                 em28xx_videodbg("setting alternate 0\n");
2219                 errCode = usb_set_interface(dev->udev, 0, 0);
2220                 if (errCode < 0) {
2221                         em28xx_errdev("cannot change alternate number to "
2222                                         "0 (error=%i)\n", errCode);
2223                 }
2224         }
2225
2226         videobuf_mmap_free(&fh->vb_vidq);
2227         videobuf_mmap_free(&fh->vb_vbiq);
2228         kfree(fh);
2229         dev->users--;
2230         wake_up_interruptible_nr(&dev->open, 1);
2231         return 0;
2232 }
2233
2234 /*
2235  * em28xx_v4l2_read()
2236  * will allocate buffers when called for the first time
2237  */
2238 static ssize_t
2239 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2240                  loff_t *pos)
2241 {
2242         struct em28xx_fh *fh = filp->private_data;
2243         struct em28xx *dev = fh->dev;
2244         int rc;
2245
2246         rc = check_dev(dev);
2247         if (rc < 0)
2248                 return rc;
2249
2250         /* FIXME: read() is not prepared to allow changing the video
2251            resolution while streaming. Seems a bug at em28xx_set_fmt
2252          */
2253
2254         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2255                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2256                         return -EBUSY;
2257
2258                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2259                                         filp->f_flags & O_NONBLOCK);
2260         }
2261
2262
2263         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2264                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2265                         return -EBUSY;
2266
2267                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2268                                         filp->f_flags & O_NONBLOCK);
2269         }
2270
2271         return 0;
2272 }
2273
2274 /*
2275  * em28xx_v4l2_poll()
2276  * will allocate buffers when called for the first time
2277  */
2278 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2279 {
2280         struct em28xx_fh *fh = filp->private_data;
2281         struct em28xx *dev = fh->dev;
2282         int rc;
2283
2284         rc = check_dev(dev);
2285         if (rc < 0)
2286                 return rc;
2287
2288         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2289                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2290                         return POLLERR;
2291                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2292         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2293                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2294                         return POLLERR;
2295                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2296         } else {
2297                 return POLLERR;
2298         }
2299 }
2300
2301 /*
2302  * em28xx_v4l2_mmap()
2303  */
2304 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2305 {
2306         struct em28xx_fh *fh    = filp->private_data;
2307         struct em28xx    *dev   = fh->dev;
2308         int              rc;
2309
2310         rc = check_dev(dev);
2311         if (rc < 0)
2312                 return rc;
2313
2314         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2315                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2316         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2317                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2318
2319         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2320                 (unsigned long)vma->vm_start,
2321                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2322                 rc);
2323
2324         return rc;
2325 }
2326
2327 static const struct v4l2_file_operations em28xx_v4l_fops = {
2328         .owner         = THIS_MODULE,
2329         .open          = em28xx_v4l2_open,
2330         .release       = em28xx_v4l2_close,
2331         .read          = em28xx_v4l2_read,
2332         .poll          = em28xx_v4l2_poll,
2333         .mmap          = em28xx_v4l2_mmap,
2334         .unlocked_ioctl = video_ioctl2,
2335 };
2336
2337 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2338         .vidioc_querycap            = vidioc_querycap,
2339         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2340         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2341         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2342         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2343         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2344         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2345         .vidioc_g_audio             = vidioc_g_audio,
2346         .vidioc_s_audio             = vidioc_s_audio,
2347         .vidioc_cropcap             = vidioc_cropcap,
2348
2349         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2350         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2351         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2352
2353         .vidioc_reqbufs             = vidioc_reqbufs,
2354         .vidioc_querybuf            = vidioc_querybuf,
2355         .vidioc_qbuf                = vidioc_qbuf,
2356         .vidioc_dqbuf               = vidioc_dqbuf,
2357         .vidioc_g_std               = vidioc_g_std,
2358         .vidioc_s_std               = vidioc_s_std,
2359         .vidioc_g_parm              = vidioc_g_parm,
2360         .vidioc_s_parm              = vidioc_s_parm,
2361         .vidioc_enum_input          = vidioc_enum_input,
2362         .vidioc_g_input             = vidioc_g_input,
2363         .vidioc_s_input             = vidioc_s_input,
2364         .vidioc_queryctrl           = vidioc_queryctrl,
2365         .vidioc_g_ctrl              = vidioc_g_ctrl,
2366         .vidioc_s_ctrl              = vidioc_s_ctrl,
2367         .vidioc_streamon            = vidioc_streamon,
2368         .vidioc_streamoff           = vidioc_streamoff,
2369         .vidioc_g_tuner             = vidioc_g_tuner,
2370         .vidioc_s_tuner             = vidioc_s_tuner,
2371         .vidioc_g_frequency         = vidioc_g_frequency,
2372         .vidioc_s_frequency         = vidioc_s_frequency,
2373 #ifdef CONFIG_VIDEO_ADV_DEBUG
2374         .vidioc_g_register          = vidioc_g_register,
2375         .vidioc_s_register          = vidioc_s_register,
2376         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
2377 #endif
2378 };
2379
2380 static const struct video_device em28xx_video_template = {
2381         .fops                       = &em28xx_v4l_fops,
2382         .release                    = video_device_release,
2383         .ioctl_ops                  = &video_ioctl_ops,
2384
2385         .tvnorms                    = V4L2_STD_ALL,
2386         .current_norm               = V4L2_STD_PAL,
2387 };
2388
2389 static const struct v4l2_file_operations radio_fops = {
2390         .owner         = THIS_MODULE,
2391         .open          = em28xx_v4l2_open,
2392         .release       = em28xx_v4l2_close,
2393         .unlocked_ioctl = video_ioctl2,
2394 };
2395
2396 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2397         .vidioc_querycap      = radio_querycap,
2398         .vidioc_g_tuner       = radio_g_tuner,
2399         .vidioc_enum_input    = radio_enum_input,
2400         .vidioc_g_audio       = radio_g_audio,
2401         .vidioc_s_tuner       = radio_s_tuner,
2402         .vidioc_s_audio       = radio_s_audio,
2403         .vidioc_s_input       = radio_s_input,
2404         .vidioc_queryctrl     = radio_queryctrl,
2405         .vidioc_g_ctrl        = vidioc_g_ctrl,
2406         .vidioc_s_ctrl        = vidioc_s_ctrl,
2407         .vidioc_g_frequency   = vidioc_g_frequency,
2408         .vidioc_s_frequency   = vidioc_s_frequency,
2409 #ifdef CONFIG_VIDEO_ADV_DEBUG
2410         .vidioc_g_register    = vidioc_g_register,
2411         .vidioc_s_register    = vidioc_s_register,
2412 #endif
2413 };
2414
2415 static struct video_device em28xx_radio_template = {
2416         .name                 = "em28xx-radio",
2417         .fops                 = &radio_fops,
2418         .ioctl_ops            = &radio_ioctl_ops,
2419 };
2420
2421 /******************************** usb interface ******************************/
2422
2423
2424
2425 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2426                                         const struct video_device *template,
2427                                         const char *type_name)
2428 {
2429         struct video_device *vfd;
2430
2431         vfd = video_device_alloc();
2432         if (NULL == vfd)
2433                 return NULL;
2434
2435         *vfd            = *template;
2436         vfd->v4l2_dev   = &dev->v4l2_dev;
2437         vfd->release    = video_device_release;
2438         vfd->debug      = video_debug;
2439         vfd->lock       = &dev->lock;
2440
2441         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2442                  dev->name, type_name);
2443
2444         video_set_drvdata(vfd, dev);
2445         return vfd;
2446 }
2447
2448 int em28xx_register_analog_devices(struct em28xx *dev)
2449 {
2450       u8 val;
2451         int ret;
2452
2453         printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
2454                 dev->name,
2455                 (EM28XX_VERSION_CODE >> 16) & 0xff,
2456                 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2457
2458         /* set default norm */
2459         dev->norm = em28xx_video_template.current_norm;
2460         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
2461         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2462         dev->ctl_input = 0;
2463
2464         /* Analog specific initialization */
2465         dev->format = &format[0];
2466         em28xx_set_video_format(dev, format[0].fourcc,
2467                                 norm_maxw(dev), norm_maxh(dev));
2468
2469         video_mux(dev, dev->ctl_input);
2470
2471         /* Audio defaults */
2472         dev->mute = 1;
2473         dev->volume = 0x1f;
2474
2475 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2476         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2477         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2478                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2479
2480         em28xx_set_outfmt(dev);
2481         em28xx_colorlevels_set_default(dev);
2482         em28xx_compression_disable(dev);
2483
2484         /* allocate and fill video video_device struct */
2485         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2486         if (!dev->vdev) {
2487                 em28xx_errdev("cannot allocate video_device.\n");
2488                 return -ENODEV;
2489         }
2490
2491         /* register v4l2 video video_device */
2492         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2493                                        video_nr[dev->devno]);
2494         if (ret) {
2495                 em28xx_errdev("unable to register video device (error=%i).\n",
2496                               ret);
2497                 return ret;
2498         }
2499
2500         /* Allocate and fill vbi video_device struct */
2501         if (em28xx_vbi_supported(dev) == 1) {
2502                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2503                                                 "vbi");
2504
2505                 /* register v4l2 vbi video_device */
2506                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2507                                             vbi_nr[dev->devno]);
2508                 if (ret < 0) {
2509                         em28xx_errdev("unable to register vbi device\n");
2510                         return ret;
2511                 }
2512         }
2513
2514         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2515                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2516                                                   "radio");
2517                 if (!dev->radio_dev) {
2518                         em28xx_errdev("cannot allocate video_device.\n");
2519                         return -ENODEV;
2520                 }
2521                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2522                                             radio_nr[dev->devno]);
2523                 if (ret < 0) {
2524                         em28xx_errdev("can't register radio device\n");
2525                         return ret;
2526                 }
2527                 em28xx_info("Registered radio device as %s\n",
2528                             video_device_node_name(dev->radio_dev));
2529         }
2530
2531         em28xx_info("V4L2 video device registered as %s\n",
2532                     video_device_node_name(dev->vdev));
2533
2534         if (dev->vbi_dev)
2535                 em28xx_info("V4L2 VBI device registered as %s\n",
2536                             video_device_node_name(dev->vbi_dev));
2537
2538         return 0;
2539 }