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

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
   3                     video capture devices
   4
   5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   6                       Markus Rechberger <mrechberger@gmail.com>
   7                       Mauro Carvalho Chehab <mchehab@infradead.org>
   8                       Sascha Sommer <saschasommer@freenet.de>
   9
  10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  11                 by Luca Risolia <luca.risolia@studio.unibo.it>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/bitmap.h>
  33 #include <linux/usb.h>
  34 #include <linux/i2c.h>
  35 #include <linux/mm.h>
  36 #include <linux/mutex.h>
  37 #include <linux/slab.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/v4l2-chip-ident.h>
  43 #include <media/msp3400.h>
  44 #include <media/tuner.h>
  45
  46 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  47                       "Markus Rechberger <mrechberger@gmail.com>, " \
  48                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  49                       "Sascha Sommer <saschasommer@freenet.de>"
  50
  51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  52
  53 #define EM28XX_VERSION "0.1.3"
  54
  55 #define em28xx_videodbg(fmt, arg...) do {\
  56         if (video_debug) \
  57                 printk(KERN_INFO "%s %s :"fmt, \
  58                          dev->name, __func__ , ##arg); } while (0)
  59
  60 static unsigned int isoc_debug;
  61 module_param(isoc_debug, int, 0644);
  62 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  63
  64 #define em28xx_isocdbg(fmt, arg...) \
  65 do {\
  66         if (isoc_debug) { \
  67                 printk(KERN_INFO "%s %s :"fmt, \
  68                          dev->name, __func__ , ##arg); \
  69         } \
  70   } while (0)
  71
  72 MODULE_AUTHOR(DRIVER_AUTHOR);
  73 MODULE_DESCRIPTION(DRIVER_DESC);
  74 MODULE_LICENSE("GPL");
  75 MODULE_VERSION(EM28XX_VERSION);
  76
  77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  80
  81 module_param_array(video_nr, int, NULL, 0444);
  82 module_param_array(vbi_nr, int, NULL, 0444);
  83 module_param_array(radio_nr, int, NULL, 0444);
  84 MODULE_PARM_DESC(video_nr, "video device numbers");
  85 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  87
  88 static unsigned int video_debug;
  89 module_param(video_debug, int, 0644);
  90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  91
  92 /* supported video standards */
  93 static struct em28xx_fmt format[] = {
  94         {
  95                 .name     = "16 bpp YUY2, 4:2:2, packed",
  96                 .fourcc   = V4L2_PIX_FMT_YUYV,
  97                 .depth    = 16,
  98                 .reg      = EM28XX_OUTFMT_YUV422_Y0UY1V,
  99         }, {
 100                 .name     = "16 bpp RGB 565, LE",
 101                 .fourcc   = V4L2_PIX_FMT_RGB565,
 102                 .depth    = 16,
 103                 .reg      = EM28XX_OUTFMT_RGB_16_656,
 104         }, {
 105                 .name     = "8 bpp Bayer BGBG..GRGR",
 106                 .fourcc   = V4L2_PIX_FMT_SBGGR8,
 107                 .depth    = 8,
 108                 .reg      = EM28XX_OUTFMT_RGB_8_BGBG,
 109         }, {
 110                 .name     = "8 bpp Bayer GRGR..BGBG",
 111                 .fourcc   = V4L2_PIX_FMT_SGRBG8,
 112                 .depth    = 8,
 113                 .reg      = EM28XX_OUTFMT_RGB_8_GRGR,
 114         }, {
 115                 .name     = "8 bpp Bayer GBGB..RGRG",
 116                 .fourcc   = V4L2_PIX_FMT_SGBRG8,
 117                 .depth    = 8,
 118                 .reg      = EM28XX_OUTFMT_RGB_8_GBGB,
 119         }, {
 120                 .name     = "12 bpp YUV411",
 121                 .fourcc   = V4L2_PIX_FMT_YUV411P,
 122                 .depth    = 12,
 123                 .reg      = EM28XX_OUTFMT_YUV411,
 124         },
 125 };
 126
 127 /* supported controls */
 128 /* Common to all boards */
 129 static struct v4l2_queryctrl ac97_qctrl[] = {
 130         {
 131                 .id = V4L2_CID_AUDIO_VOLUME,
 132                 .type = V4L2_CTRL_TYPE_INTEGER,
 133                 .name = "Volume",
 134                 .minimum = 0x0,
 135                 .maximum = 0x1f,
 136                 .step = 0x1,
 137                 .default_value = 0x1f,
 138                 .flags = V4L2_CTRL_FLAG_SLIDER,
 139         }, {
 140                 .id = V4L2_CID_AUDIO_MUTE,
 141                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 142                 .name = "Mute",
 143                 .minimum = 0,
 144                 .maximum = 1,
 145                 .step = 1,
 146                 .default_value = 1,
 147                 .flags = 0,
 148         }
 149 };
 150
 151 /* ------------------------------------------------------------------
 152         DMA and thread functions
 153    ------------------------------------------------------------------*/
 154
 155 /*
 156  * Announces that a buffer were filled and request the next
 157  */
 158 static inline void buffer_filled(struct em28xx *dev,
 159                                   struct em28xx_dmaqueue *dma_q,
 160                                   struct em28xx_buffer *buf)
 161 {
 162         /* Advice that buffer was filled */
 163         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 164         buf->vb.state = VIDEOBUF_DONE;
 165         buf->vb.field_count++;
 166         do_gettimeofday(&buf->vb.ts);
 167
 168         dev->isoc_ctl.vid_buf = NULL;
 169
 170         list_del(&buf->vb.queue);
 171         wake_up(&buf->vb.done);
 172 }
 173
 174 static inline void vbi_buffer_filled(struct em28xx *dev,
 175                                      struct em28xx_dmaqueue *dma_q,
 176                                      struct em28xx_buffer *buf)
 177 {
 178         /* Advice that buffer was filled */
 179         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 180
 181         buf->vb.state = VIDEOBUF_DONE;
 182         buf->vb.field_count++;
 183         do_gettimeofday(&buf->vb.ts);
 184
 185         dev->isoc_ctl.vbi_buf = NULL;
 186
 187         list_del(&buf->vb.queue);
 188         wake_up(&buf->vb.done);
 189 }
 190
 191 /*
 192  * Identify the buffer header type and properly handles
 193  */
 194 static void em28xx_copy_video(struct em28xx *dev,
 195                               struct em28xx_dmaqueue  *dma_q,
 196                               struct em28xx_buffer *buf,
 197                               unsigned char *p,
 198                               unsigned char *outp, unsigned long len)
 199 {
 200         void *fieldstart, *startwrite, *startread;
 201         int  linesdone, currlinedone, offset, lencopy, remain;
 202         int bytesperline = dev->width << 1;
 203
 204         if (dma_q->pos + len > buf->vb.size)
 205                 len = buf->vb.size - dma_q->pos;
 206
 207         startread = p;
 208         remain = len;
 209
 210         if (dev->progressive)
 211                 fieldstart = outp;
 212         else {
 213                 /* Interlaces two half frames */
 214                 if (buf->top_field)
 215                         fieldstart = outp;
 216                 else
 217                         fieldstart = outp + bytesperline;
 218         }
 219
 220         linesdone = dma_q->pos / bytesperline;
 221         currlinedone = dma_q->pos % bytesperline;
 222
 223         if (dev->progressive)
 224                 offset = linesdone * bytesperline + currlinedone;
 225         else
 226                 offset = linesdone * bytesperline * 2 + currlinedone;
 227
 228         startwrite = fieldstart + offset;
 229         lencopy = bytesperline - currlinedone;
 230         lencopy = lencopy > remain ? remain : lencopy;
 231
 232         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 233                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 234                                ((char *)startwrite + lencopy) -
 235                                ((char *)outp + buf->vb.size));
 236                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
 237                 lencopy = remain;
 238         }
 239         if (lencopy <= 0)
 240                 return;
 241         memcpy(startwrite, startread, lencopy);
 242
 243         remain -= lencopy;
 244
 245         while (remain > 0) {
 246                 startwrite += lencopy + bytesperline;
 247                 startread += lencopy;
 248                 if (bytesperline > remain)
 249                         lencopy = remain;
 250                 else
 251                         lencopy = bytesperline;
 252
 253                 if ((char *)startwrite + lencopy > (char *)outp +
 254                     buf->vb.size) {
 255                         em28xx_isocdbg("Overflow of %zi bytes past buffer end"
 256                                        "(2)\n",
 257                                        ((char *)startwrite + lencopy) -
 258                                        ((char *)outp + buf->vb.size));
 259                         lencopy = remain = (char *)outp + buf->vb.size -
 260                                            (char *)startwrite;
 261                 }
 262                 if (lencopy <= 0)
 263                         break;
 264
 265                 memcpy(startwrite, startread, lencopy);
 266
 267                 remain -= lencopy;
 268         }
 269
 270         dma_q->pos += len;
 271 }
 272
 273 static void em28xx_copy_vbi(struct em28xx *dev,
 274                               struct em28xx_dmaqueue  *dma_q,
 275                               struct em28xx_buffer *buf,
 276                               unsigned char *p,
 277                               unsigned char *outp, unsigned long len)
 278 {
 279         void *startwrite, *startread;
 280         int  offset;
 281         int bytesperline;
 282
 283         if (dev == NULL) {
 284                 em28xx_isocdbg("dev is null\n");
 285                 return;
 286         }
 287         bytesperline = dev->vbi_width;
 288
 289         if (dma_q == NULL) {
 290                 em28xx_isocdbg("dma_q is null\n");
 291                 return;
 292         }
 293         if (buf == NULL) {
 294                 return;
 295         }
 296         if (p == NULL) {
 297                 em28xx_isocdbg("p is null\n");
 298                 return;
 299         }
 300         if (outp == NULL) {
 301                 em28xx_isocdbg("outp is null\n");
 302                 return;
 303         }
 304
 305         if (dma_q->pos + len > buf->vb.size)
 306                 len = buf->vb.size - dma_q->pos;
 307
 308         startread = p;
 309
 310         startwrite = outp + dma_q->pos;
 311         offset = dma_q->pos;
 312
 313         /* Make sure the bottom field populates the second half of the frame */
 314         if (buf->top_field == 0) {
 315                 startwrite += bytesperline * dev->vbi_height;
 316                 offset += bytesperline * dev->vbi_height;
 317         }
 318
 319         memcpy(startwrite, startread, len);
 320         dma_q->pos += len;
 321 }
 322
 323 static inline void print_err_status(struct em28xx *dev,
 324                                      int packet, int status)
 325 {
 326         char *errmsg = "Unknown";
 327
 328         switch (status) {
 329         case -ENOENT:
 330                 errmsg = "unlinked synchronuously";
 331                 break;
 332         case -ECONNRESET:
 333                 errmsg = "unlinked asynchronuously";
 334                 break;
 335         case -ENOSR:
 336                 errmsg = "Buffer error (overrun)";
 337                 break;
 338         case -EPIPE:
 339                 errmsg = "Stalled (device not responding)";
 340                 break;
 341         case -EOVERFLOW:
 342                 errmsg = "Babble (bad cable?)";
 343                 break;
 344         case -EPROTO:
 345                 errmsg = "Bit-stuff error (bad cable?)";
 346                 break;
 347         case -EILSEQ:
 348                 errmsg = "CRC/Timeout (could be anything)";
 349                 break;
 350         case -ETIME:
 351                 errmsg = "Device does not respond";
 352                 break;
 353         }
 354         if (packet < 0) {
 355                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 356         } else {
 357                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 358                                packet, status, errmsg);
 359         }
 360 }
 361
 362 /*
 363  * video-buf generic routine to get the next available buffer
 364  */
 365 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 366                                           struct em28xx_buffer **buf)
 367 {
 368         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 369         char *outp;
 370
 371         if (list_empty(&dma_q->active)) {
 372                 em28xx_isocdbg("No active queue to serve\n");
 373                 dev->isoc_ctl.vid_buf = NULL;
 374                 *buf = NULL;
 375                 return;
 376         }
 377
 378         /* Get the next buffer */
 379         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 380
 381         /* Cleans up buffer - Useful for testing for frame/URB loss */
 382         outp = videobuf_to_vmalloc(&(*buf)->vb);
 383         memset(outp, 0, (*buf)->vb.size);
 384
 385         dev->isoc_ctl.vid_buf = *buf;
 386
 387         return;
 388 }
 389
 390 /*
 391  * video-buf generic routine to get the next available VBI buffer
 392  */
 393 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
 394                                     struct em28xx_buffer **buf)
 395 {
 396         struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
 397         char *outp;
 398
 399         if (list_empty(&dma_q->active)) {
 400                 em28xx_isocdbg("No active queue to serve\n");
 401                 dev->isoc_ctl.vbi_buf = NULL;
 402                 *buf = NULL;
 403                 return;
 404         }
 405
 406         /* Get the next buffer */
 407         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 408         /* Cleans up buffer - Useful for testing for frame/URB loss */
 409         outp = videobuf_to_vmalloc(&(*buf)->vb);
 410         memset(outp, 0x00, (*buf)->vb.size);
 411
 412         dev->isoc_ctl.vbi_buf = *buf;
 413
 414         return;
 415 }
 416
 417 /*
 418  * Controls the isoc copy of each urb packet
 419  */
 420 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 421 {
 422         struct em28xx_buffer    *buf;
 423         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 424         unsigned char *outp = NULL;
 425         int i, len = 0, rc = 1;
 426         unsigned char *p;
 427
 428         if (!dev)
 429                 return 0;
 430
 431         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 432                 return 0;
 433
 434         if (urb->status < 0) {
 435                 print_err_status(dev, -1, urb->status);
 436                 if (urb->status == -ENOENT)
 437                         return 0;
 438         }
 439
 440         buf = dev->isoc_ctl.vid_buf;
 441         if (buf != NULL)
 442                 outp = videobuf_to_vmalloc(&buf->vb);
 443
 444         for (i = 0; i < urb->number_of_packets; i++) {
 445                 int status = urb->iso_frame_desc[i].status;
 446
 447                 if (status < 0) {
 448                         print_err_status(dev, i, status);
 449                         if (urb->iso_frame_desc[i].status != -EPROTO)
 450                                 continue;
 451                 }
 452
 453                 len = urb->iso_frame_desc[i].actual_length - 4;
 454
 455                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 456                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 457                         continue;
 458                 }
 459                 if (urb->iso_frame_desc[i].actual_length >
 460                                                 dev->max_pkt_size) {
 461                         em28xx_isocdbg("packet bigger than packet size");
 462                         continue;
 463                 }
 464
 465                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 466
 467                 /* FIXME: incomplete buffer checks where removed to make
 468                    logic simpler. Impacts of those changes should be evaluated
 469                  */
 470                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 471                         em28xx_isocdbg("VBI HEADER!!!\n");
 472                         /* FIXME: Should add vbi copy */
 473                         continue;
 474                 }
 475                 if (p[0] == 0x22 && p[1] == 0x5a) {
 476                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 477                                        len, (p[2] & 1) ? "odd" : "even");
 478
 479                         if (dev->progressive || !(p[2] & 1)) {
 480                                 if (buf != NULL)
 481                                         buffer_filled(dev, dma_q, buf);
 482                                 get_next_buf(dma_q, &buf);
 483                                 if (buf == NULL)
 484                                         outp = NULL;
 485                                 else
 486                                         outp = videobuf_to_vmalloc(&buf->vb);
 487                         }
 488
 489                         if (buf != NULL) {
 490                                 if (p[2] & 1)
 491                                         buf->top_field = 0;
 492                                 else
 493                                         buf->top_field = 1;
 494                         }
 495
 496                         dma_q->pos = 0;
 497                 }
 498                 if (buf != NULL) {
 499                         if (p[0] != 0x88 && p[0] != 0x22) {
 500                                 em28xx_isocdbg("frame is not complete\n");
 501                                 len += 4;
 502                         } else {
 503                                 p += 4;
 504                         }
 505                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 506                 }
 507         }
 508         return rc;
 509 }
 510
 511 /* Version of isoc handler that takes into account a mixture of video and
 512    VBI data */
 513 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
 514 {
 515         struct em28xx_buffer    *buf, *vbi_buf;
 516         struct em28xx_dmaqueue  *dma_q = &dev->vidq;
 517         struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;
 518         unsigned char *outp = NULL;
 519         unsigned char *vbioutp = NULL;
 520         int i, len = 0, rc = 1;
 521         unsigned char *p;
 522         int vbi_size;
 523
 524         if (!dev)
 525                 return 0;
 526
 527         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 528                 return 0;
 529
 530         if (urb->status < 0) {
 531                 print_err_status(dev, -1, urb->status);
 532                 if (urb->status == -ENOENT)
 533                         return 0;
 534         }
 535
 536         buf = dev->isoc_ctl.vid_buf;
 537         if (buf != NULL)
 538                 outp = videobuf_to_vmalloc(&buf->vb);
 539
 540         vbi_buf = dev->isoc_ctl.vbi_buf;
 541         if (vbi_buf != NULL)
 542                 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
 543
 544         for (i = 0; i < urb->number_of_packets; i++) {
 545                 int status = urb->iso_frame_desc[i].status;
 546
 547                 if (status < 0) {
 548                         print_err_status(dev, i, status);
 549                         if (urb->iso_frame_desc[i].status != -EPROTO)
 550                                 continue;
 551                 }
 552
 553                 len = urb->iso_frame_desc[i].actual_length;
 554                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 555                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 556                         continue;
 557                 }
 558                 if (urb->iso_frame_desc[i].actual_length >
 559                                                 dev->max_pkt_size) {
 560                         em28xx_isocdbg("packet bigger than packet size");
 561                         continue;
 562                 }
 563
 564                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 565
 566                 /* capture type 0 = vbi start
 567                    capture type 1 = video start
 568                    capture type 2 = video in progress */
 569                 if (p[0] == 0x33 && p[1] == 0x95) {
 570                         dev->capture_type = 0;
 571                         dev->vbi_read = 0;
 572                         em28xx_isocdbg("VBI START HEADER!!!\n");
 573                         dev->cur_field = p[2];
 574                         p += 4;
 575                         len -= 4;
 576                 } else if (p[0] == 0x88 && p[1] == 0x88 &&
 577                            p[2] == 0x88 && p[3] == 0x88) {
 578                         /* continuation */
 579                         p += 4;
 580                         len -= 4;
 581                 } else if (p[0] == 0x22 && p[1] == 0x5a) {
 582                         /* start video */
 583                         p += 4;
 584                         len -= 4;
 585                 }
 586
 587                 vbi_size = dev->vbi_width * dev->vbi_height;
 588
 589                 if (dev->capture_type == 0) {
 590                         if (dev->vbi_read >= vbi_size) {
 591                                 /* We've already read all the VBI data, so
 592                                    treat the rest as video */
 593                                 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
 594                         } else if ((dev->vbi_read + len) < vbi_size) {
 595                                 /* This entire frame is VBI data */
 596                                 if (dev->vbi_read == 0 &&
 597                                     (!(dev->cur_field & 1))) {
 598                                         /* Brand new frame */
 599                                         if (vbi_buf != NULL)
 600                                                 vbi_buffer_filled(dev,
 601                                                                   vbi_dma_q,
 602                                                                   vbi_buf);
 603                                         vbi_get_next_buf(vbi_dma_q, &vbi_buf);
 604                                         if (vbi_buf == NULL)
 605                                                 vbioutp = NULL;
 606                                         else
 607                                                 vbioutp = videobuf_to_vmalloc(
 608                                                         &vbi_buf->vb);
 609                                 }
 610
 611                                 if (dev->vbi_read == 0) {
 612                                         vbi_dma_q->pos = 0;
 613                                         if (vbi_buf != NULL) {
 614                                                 if (dev->cur_field & 1)
 615                                                         vbi_buf->top_field = 0;
 616                                                 else
 617                                                         vbi_buf->top_field = 1;
 618                                         }
 619                                 }
 620
 621                                 dev->vbi_read += len;
 622                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 623                                                 vbioutp, len);
 624                         } else {
 625                                 /* Some of this frame is VBI data and some is
 626                                    video data */
 627                                 int vbi_data_len = vbi_size - dev->vbi_read;
 628                                 dev->vbi_read += vbi_data_len;
 629                                 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
 630                                                 vbioutp, vbi_data_len);
 631                                 dev->capture_type = 1;
 632                                 p += vbi_data_len;
 633                                 len -= vbi_data_len;
 634                         }
 635                 }
 636
 637                 if (dev->capture_type == 1) {
 638                         dev->capture_type = 2;
 639                         if (dev->progressive || !(dev->cur_field & 1)) {
 640                                 if (buf != NULL)
 641                                         buffer_filled(dev, dma_q, buf);
 642                                 get_next_buf(dma_q, &buf);
 643                                 if (buf == NULL)
 644                                         outp = NULL;
 645                                 else
 646                                         outp = videobuf_to_vmalloc(&buf->vb);
 647                         }
 648                         if (buf != NULL) {
 649                                 if (dev->cur_field & 1)
 650                                         buf->top_field = 0;
 651                                 else
 652                                         buf->top_field = 1;
 653                         }
 654
 655                         dma_q->pos = 0;
 656                 }
 657
 658                 if (buf != NULL && dev->capture_type == 2) {
 659                         if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 &&
 660                             p[2] == 0x88 && p[3] == 0x88) {
 661                                 p += 4;
 662                                 len -= 4;
 663                         }
 664                         if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) {
 665                                 em28xx_isocdbg("Video frame %d, len=%i, %s\n",
 666                                                p[2], len, (p[2] & 1) ?
 667                                                "odd" : "even");
 668                                 p += 4;
 669                                 len -= 4;
 670                         }
 671
 672                         if (len > 0)
 673                                 em28xx_copy_video(dev, dma_q, buf, p, outp,
 674                                                   len);
 675                 }
 676         }
 677         return rc;
 678 }
 679
 680
 681 /* ------------------------------------------------------------------
 682         Videobuf operations
 683    ------------------------------------------------------------------*/
 684
 685 static int
 686 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 687 {
 688         struct em28xx_fh *fh = vq->priv_data;
 689         struct em28xx        *dev = fh->dev;
 690         struct v4l2_frequency f;
 691
 692         *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
 693                 >> 3;
 694
 695         if (0 == *count)
 696                 *count = EM28XX_DEF_BUF;
 697
 698         if (*count < EM28XX_MIN_BUF)
 699                 *count = EM28XX_MIN_BUF;
 700
 701         /* Ask tuner to go to analog or radio mode */
 702         memset(&f, 0, sizeof(f));
 703         f.frequency = dev->ctl_freq;
 704         f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 705
 706         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
 707
 708         return 0;
 709 }
 710
 711 /* This is called *without* dev->slock held; please keep it that way */
 712 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 713 {
 714         struct em28xx_fh     *fh  = vq->priv_data;
 715         struct em28xx        *dev = fh->dev;
 716         unsigned long flags = 0;
 717         if (in_interrupt())
 718                 BUG();
 719
 720         /* We used to wait for the buffer to finish here, but this didn't work
 721            because, as we were keeping the state as VIDEOBUF_QUEUED,
 722            videobuf_queue_cancel marked it as finished for us.
 723            (Also, it could wedge forever if the hardware was misconfigured.)
 724
 725            This should be safe; by the time we get here, the buffer isn't
 726            queued anymore. If we ever start marking the buffers as
 727            VIDEOBUF_ACTIVE, it won't be, though.
 728         */
 729         spin_lock_irqsave(&dev->slock, flags);
 730         if (dev->isoc_ctl.vid_buf == buf)
 731                 dev->isoc_ctl.vid_buf = NULL;
 732         spin_unlock_irqrestore(&dev->slock, flags);
 733
 734         videobuf_vmalloc_free(&buf->vb);
 735         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 736 }
 737
 738 static int
 739 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 740                                                 enum v4l2_field field)
 741 {
 742         struct em28xx_fh     *fh  = vq->priv_data;
 743         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 744         struct em28xx        *dev = fh->dev;
 745         int                  rc = 0, urb_init = 0;
 746
 747         buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
 748                         + 7) >> 3;
 749
 750         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 751                 return -EINVAL;
 752
 753         buf->vb.width  = dev->width;
 754         buf->vb.height = dev->height;
 755         buf->vb.field  = field;
 756
 757         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 758                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 759                 if (rc < 0)
 760                         goto fail;
 761         }
 762
 763         if (!dev->isoc_ctl.num_bufs)
 764                 urb_init = 1;
 765
 766         if (urb_init) {
 767                 if (em28xx_vbi_supported(dev) == 1)
 768                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 769                                               EM28XX_NUM_BUFS,
 770                                               dev->max_pkt_size,
 771                                               em28xx_isoc_copy_vbi);
 772                 else
 773                         rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 774                                               EM28XX_NUM_BUFS,
 775                                               dev->max_pkt_size,
 776                                               em28xx_isoc_copy);
 777                 if (rc < 0)
 778                         goto fail;
 779         }
 780
 781         buf->vb.state = VIDEOBUF_PREPARED;
 782         return 0;
 783
 784 fail:
 785         free_buffer(vq, buf);
 786         return rc;
 787 }
 788
 789 static void
 790 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 791 {
 792         struct em28xx_buffer    *buf     = container_of(vb,
 793                                                         struct em28xx_buffer,
 794                                                         vb);
 795         struct em28xx_fh        *fh      = vq->priv_data;
 796         struct em28xx           *dev     = fh->dev;
 797         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 798
 799         buf->vb.state = VIDEOBUF_QUEUED;
 800         list_add_tail(&buf->vb.queue, &vidq->active);
 801
 802 }
 803
 804 static void buffer_release(struct videobuf_queue *vq,
 805                                 struct videobuf_buffer *vb)
 806 {
 807         struct em28xx_buffer   *buf  = container_of(vb,
 808                                                     struct em28xx_buffer,
 809                                                     vb);
 810         struct em28xx_fh       *fh   = vq->priv_data;
 811         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 812
 813         em28xx_isocdbg("em28xx: called buffer_release\n");
 814
 815         free_buffer(vq, buf);
 816 }
 817
 818 static struct videobuf_queue_ops em28xx_video_qops = {
 819         .buf_setup      = buffer_setup,
 820         .buf_prepare    = buffer_prepare,
 821         .buf_queue      = buffer_queue,
 822         .buf_release    = buffer_release,
 823 };
 824
 825 /*********************  v4l2 interface  **************************************/
 826
 827 static void video_mux(struct em28xx *dev, int index)
 828 {
 829         dev->ctl_input = index;
 830         dev->ctl_ainput = INPUT(index)->amux;
 831         dev->ctl_aoutput = INPUT(index)->aout;
 832
 833         if (!dev->ctl_aoutput)
 834                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 835
 836         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
 837                         INPUT(index)->vmux, 0, 0);
 838
 839         if (dev->board.has_msp34xx) {
 840                 if (dev->i2s_speed) {
 841                         v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
 842                                 s_i2s_clock_freq, dev->i2s_speed);
 843                 }
 844                 /* Note: this is msp3400 specific */
 845                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 846                          dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
 847         }
 848
 849         if (dev->board.adecoder != EM28XX_NOADECODER) {
 850                 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
 851                         dev->ctl_ainput, dev->ctl_aoutput, 0);
 852         }
 853
 854         em28xx_audio_analog_set(dev);
 855 }
 856
 857 /* Usage lock check functions */
 858 static int res_get(struct em28xx_fh *fh, unsigned int bit)
 859 {
 860         struct em28xx    *dev = fh->dev;
 861
 862         if (fh->resources & bit)
 863                 /* have it already allocated */
 864                 return 1;
 865
 866         /* is it free? */
 867         if (dev->resources & bit) {
 868                 /* no, someone else uses it */
 869                 return 0;
 870         }
 871         /* it's free, grab it */
 872         fh->resources  |= bit;
 873         dev->resources |= bit;
 874         em28xx_videodbg("res: get %d\n", bit);
 875         return 1;
 876 }
 877
 878 static int res_check(struct em28xx_fh *fh, unsigned int bit)
 879 {
 880         return fh->resources & bit;
 881 }
 882
 883 static int res_locked(struct em28xx *dev, unsigned int bit)
 884 {
 885         return dev->resources & bit;
 886 }
 887
 888 static void res_free(struct em28xx_fh *fh, unsigned int bits)
 889 {
 890         struct em28xx    *dev = fh->dev;
 891
 892         BUG_ON((fh->resources & bits) != bits);
 893
 894         fh->resources  &= ~bits;
 895         dev->resources &= ~bits;
 896         em28xx_videodbg("res: put %d\n", bits);
 897 }
 898
 899 static int get_ressource(struct em28xx_fh *fh)
 900 {
 901         switch (fh->type) {
 902         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 903                 return EM28XX_RESOURCE_VIDEO;
 904         case V4L2_BUF_TYPE_VBI_CAPTURE:
 905                 return EM28XX_RESOURCE_VBI;
 906         default:
 907                 BUG();
 908                 return 0;
 909         }
 910 }
 911
 912 /*
 913  * ac97_queryctrl()
 914  * return the ac97 supported controls
 915  */
 916 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
 917 {
 918         int i;
 919
 920         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
 921                 if (qc->id && qc->id == ac97_qctrl[i].id) {
 922                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
 923                         return 0;
 924                 }
 925         }
 926
 927         /* Control is not ac97 related */
 928         return 1;
 929 }
 930
 931 /*
 932  * ac97_get_ctrl()
 933  * return the current values for ac97 mute and volume
 934  */
 935 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 936 {
 937         switch (ctrl->id) {
 938         case V4L2_CID_AUDIO_MUTE:
 939                 ctrl->value = dev->mute;
 940                 return 0;
 941         case V4L2_CID_AUDIO_VOLUME:
 942                 ctrl->value = dev->volume;
 943                 return 0;
 944         default:
 945                 /* Control is not ac97 related */
 946                 return 1;
 947         }
 948 }
 949
 950 /*
 951  * ac97_set_ctrl()
 952  * set values for ac97 mute and volume
 953  */
 954 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 955 {
 956         int i;
 957
 958         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
 959                 if (ctrl->id == ac97_qctrl[i].id)
 960                         goto handle;
 961
 962         /* Announce that hasn't handle it */
 963         return 1;
 964
 965 handle:
 966         if (ctrl->value < ac97_qctrl[i].minimum ||
 967             ctrl->value > ac97_qctrl[i].maximum)
 968                 return -ERANGE;
 969
 970         switch (ctrl->id) {
 971         case V4L2_CID_AUDIO_MUTE:
 972                 dev->mute = ctrl->value;
 973                 break;
 974         case V4L2_CID_AUDIO_VOLUME:
 975                 dev->volume = ctrl->value;
 976                 break;
 977         }
 978
 979         return em28xx_audio_analog_set(dev);
 980 }
 981
 982 static int check_dev(struct em28xx *dev)
 983 {
 984         if (dev->state & DEV_DISCONNECTED) {
 985                 em28xx_errdev("v4l2 ioctl: device not present\n");
 986                 return -ENODEV;
 987         }
 988
 989         if (dev->state & DEV_MISCONFIGURED) {
 990                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 991                               "close and open it again\n");
 992                 return -EIO;
 993         }
 994         return 0;
 995 }
 996
 997 static void get_scale(struct em28xx *dev,
 998                         unsigned int width, unsigned int height,
 999                         unsigned int *hscale, unsigned int *vscale)
1000 {
1001         unsigned int          maxw = norm_maxw(dev);
1002         unsigned int          maxh = norm_maxh(dev);
1003
1004         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1005         if (*hscale >= 0x4000)
1006                 *hscale = 0x3fff;
1007
1008         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1009         if (*vscale >= 0x4000)
1010                 *vscale = 0x3fff;
1011 }
1012
1013 /* ------------------------------------------------------------------
1014         IOCTL vidioc handling
1015    ------------------------------------------------------------------*/
1016
1017 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1018                                         struct v4l2_format *f)
1019 {
1020         struct em28xx_fh      *fh  = priv;
1021         struct em28xx         *dev = fh->dev;
1022
1023         f->fmt.pix.width = dev->width;
1024         f->fmt.pix.height = dev->height;
1025         f->fmt.pix.pixelformat = dev->format->fourcc;
1026         f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1027         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
1028         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1029
1030         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1031         if (dev->progressive)
1032                 f->fmt.pix.field = V4L2_FIELD_NONE;
1033         else
1034                 f->fmt.pix.field = dev->interlaced ?
1035                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1036         return 0;
1037 }
1038
1039 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1040 {
1041         unsigned int i;
1042
1043         for (i = 0; i < ARRAY_SIZE(format); i++)
1044                 if (format[i].fourcc == fourcc)
1045                         return &format[i];
1046
1047         return NULL;
1048 }
1049
1050 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1051                         struct v4l2_format *f)
1052 {
1053         struct em28xx_fh      *fh    = priv;
1054         struct em28xx         *dev   = fh->dev;
1055         unsigned int          width  = f->fmt.pix.width;
1056         unsigned int          height = f->fmt.pix.height;
1057         unsigned int          maxw   = norm_maxw(dev);
1058         unsigned int          maxh   = norm_maxh(dev);
1059         unsigned int          hscale, vscale;
1060         struct em28xx_fmt     *fmt;
1061
1062         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1063         if (!fmt) {
1064                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1065                                 f->fmt.pix.pixelformat);
1066                 return -EINVAL;
1067         }
1068
1069         if (dev->board.is_em2800) {
1070                 /* the em2800 can only scale down to 50% */
1071                 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1072                 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1073         } else {
1074                 /* width must even because of the YUYV format
1075                    height must be even because of interlacing */
1076                 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1077                                       1, 0);
1078         }
1079
1080         get_scale(dev, width, height, &hscale, &vscale);
1081
1082         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1083         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1084
1085         f->fmt.pix.width = width;
1086         f->fmt.pix.height = height;
1087         f->fmt.pix.pixelformat = fmt->fourcc;
1088         f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1089         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1090         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1091         if (dev->progressive)
1092                 f->fmt.pix.field = V4L2_FIELD_NONE;
1093         else
1094                 f->fmt.pix.field = dev->interlaced ?
1095                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1096
1097         return 0;
1098 }
1099
1100 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1101                                    unsigned width, unsigned height)
1102 {
1103         struct em28xx_fmt     *fmt;
1104
1105         fmt = format_by_fourcc(fourcc);
1106         if (!fmt)
1107                 return -EINVAL;
1108
1109         dev->format = fmt;
1110         dev->width  = width;
1111         dev->height = height;
1112
1113         /* set new image size */
1114         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1115
1116         em28xx_set_alternate(dev);
1117         em28xx_resolution_set(dev);
1118
1119         return 0;
1120 }
1121
1122 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1123                         struct v4l2_format *f)
1124 {
1125         struct em28xx_fh      *fh  = priv;
1126         struct em28xx         *dev = fh->dev;
1127         int                   rc;
1128
1129         rc = check_dev(dev);
1130         if (rc < 0)
1131                 return rc;
1132
1133         vidioc_try_fmt_vid_cap(file, priv, f);
1134
1135         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1136                 em28xx_errdev("%s queue busy\n", __func__);
1137                 return -EBUSY;
1138         }
1139
1140         return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1141                                 f->fmt.pix.width, f->fmt.pix.height);
1142 }
1143
1144 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1145 {
1146         struct em28xx_fh   *fh  = priv;
1147         struct em28xx      *dev = fh->dev;
1148         int                rc;
1149
1150         rc = check_dev(dev);
1151         if (rc < 0)
1152                 return rc;
1153
1154         *norm = dev->norm;
1155
1156         return 0;
1157 }
1158
1159 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1160 {
1161         struct em28xx_fh   *fh  = priv;
1162         struct em28xx      *dev = fh->dev;
1163         struct v4l2_format f;
1164         int                rc;
1165
1166         rc = check_dev(dev);
1167         if (rc < 0)
1168                 return rc;
1169
1170         dev->norm = *norm;
1171
1172         /* Adjusts width/height, if needed */
1173         f.fmt.pix.width = dev->width;
1174         f.fmt.pix.height = dev->height;
1175         vidioc_try_fmt_vid_cap(file, priv, &f);
1176
1177         /* set new image size */
1178         dev->width = f.fmt.pix.width;
1179         dev->height = f.fmt.pix.height;
1180         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1181
1182         em28xx_resolution_set(dev);
1183         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1184
1185         return 0;
1186 }
1187
1188 static int vidioc_g_parm(struct file *file, void *priv,
1189                          struct v4l2_streamparm *p)
1190 {
1191         struct em28xx_fh   *fh  = priv;
1192         struct em28xx      *dev = fh->dev;
1193         int rc = 0;
1194
1195         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1196                 return -EINVAL;
1197
1198         if (dev->board.is_webcam)
1199                 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1200                                                 video, g_parm, p);
1201         else
1202                 v4l2_video_std_frame_period(dev->norm,
1203                                                  &p->parm.capture.timeperframe);
1204
1205         return rc;
1206 }
1207
1208 static int vidioc_s_parm(struct file *file, void *priv,
1209                          struct v4l2_streamparm *p)
1210 {
1211         struct em28xx_fh   *fh  = priv;
1212         struct em28xx      *dev = fh->dev;
1213
1214         if (!dev->board.is_webcam)
1215                 return -EINVAL;
1216
1217         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1218                 return -EINVAL;
1219
1220         return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1221 }
1222
1223 static const char *iname[] = {
1224         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1225         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1226         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1227         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1228         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1229         [EM28XX_VMUX_TELEVISION] = "Television",
1230         [EM28XX_VMUX_CABLE]      = "Cable TV",
1231         [EM28XX_VMUX_DVB]        = "DVB",
1232         [EM28XX_VMUX_DEBUG]      = "for debug only",
1233 };
1234
1235 static int vidioc_enum_input(struct file *file, void *priv,
1236                                 struct v4l2_input *i)
1237 {
1238         struct em28xx_fh   *fh  = priv;
1239         struct em28xx      *dev = fh->dev;
1240         unsigned int       n;
1241
1242         n = i->index;
1243         if (n >= MAX_EM28XX_INPUT)
1244                 return -EINVAL;
1245         if (0 == INPUT(n)->type)
1246                 return -EINVAL;
1247
1248         i->index = n;
1249         i->type = V4L2_INPUT_TYPE_CAMERA;
1250
1251         strcpy(i->name, iname[INPUT(n)->type]);
1252
1253         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1254                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1255                 i->type = V4L2_INPUT_TYPE_TUNER;
1256
1257         i->std = dev->vdev->tvnorms;
1258
1259         return 0;
1260 }
1261
1262 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1263 {
1264         struct em28xx_fh   *fh  = priv;
1265         struct em28xx      *dev = fh->dev;
1266
1267         *i = dev->ctl_input;
1268
1269         return 0;
1270 }
1271
1272 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1273 {
1274         struct em28xx_fh   *fh  = priv;
1275         struct em28xx      *dev = fh->dev;
1276         int                rc;
1277
1278         rc = check_dev(dev);
1279         if (rc < 0)
1280                 return rc;
1281
1282         if (i >= MAX_EM28XX_INPUT)
1283                 return -EINVAL;
1284         if (0 == INPUT(i)->type)
1285                 return -EINVAL;
1286
1287         dev->ctl_input = i;
1288
1289         video_mux(dev, dev->ctl_input);
1290         return 0;
1291 }
1292
1293 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1294 {
1295         struct em28xx_fh   *fh    = priv;
1296         struct em28xx      *dev   = fh->dev;
1297
1298         if (!dev->audio_mode.has_audio)
1299                 return -EINVAL;
1300
1301         switch (a->index) {
1302         case EM28XX_AMUX_VIDEO:
1303                 strcpy(a->name, "Television");
1304                 break;
1305         case EM28XX_AMUX_LINE_IN:
1306                 strcpy(a->name, "Line In");
1307                 break;
1308         case EM28XX_AMUX_VIDEO2:
1309                 strcpy(a->name, "Television alt");
1310                 break;
1311         case EM28XX_AMUX_PHONE:
1312                 strcpy(a->name, "Phone");
1313                 break;
1314         case EM28XX_AMUX_MIC:
1315                 strcpy(a->name, "Mic");
1316                 break;
1317         case EM28XX_AMUX_CD:
1318                 strcpy(a->name, "CD");
1319                 break;
1320         case EM28XX_AMUX_AUX:
1321                 strcpy(a->name, "Aux");
1322                 break;
1323         case EM28XX_AMUX_PCM_OUT:
1324                 strcpy(a->name, "PCM");
1325                 break;
1326         default:
1327                 return -EINVAL;
1328         }
1329
1330         a->index = dev->ctl_ainput;
1331         a->capability = V4L2_AUDCAP_STEREO;
1332
1333         return 0;
1334 }
1335
1336 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1337 {
1338         struct em28xx_fh   *fh  = priv;
1339         struct em28xx      *dev = fh->dev;
1340
1341
1342         if (!dev->audio_mode.has_audio)
1343                 return -EINVAL;
1344
1345         if (a->index >= MAX_EM28XX_INPUT)
1346                 return -EINVAL;
1347         if (0 == INPUT(a->index)->type)
1348                 return -EINVAL;
1349
1350         dev->ctl_ainput = INPUT(a->index)->amux;
1351         dev->ctl_aoutput = INPUT(a->index)->aout;
1352
1353         if (!dev->ctl_aoutput)
1354                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1355
1356         return 0;
1357 }
1358
1359 static int vidioc_queryctrl(struct file *file, void *priv,
1360                                 struct v4l2_queryctrl *qc)
1361 {
1362         struct em28xx_fh      *fh  = priv;
1363         struct em28xx         *dev = fh->dev;
1364         int                   id  = qc->id;
1365         int                   rc;
1366
1367         rc = check_dev(dev);
1368         if (rc < 0)
1369                 return rc;
1370
1371         memset(qc, 0, sizeof(*qc));
1372
1373         qc->id = id;
1374
1375         /* enumerate AC97 controls */
1376         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1377                 rc = ac97_queryctrl(qc);
1378                 if (!rc)
1379                         return 0;
1380         }
1381
1382         /* enumerate V4L2 device controls */
1383         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1384
1385         if (qc->type)
1386                 return 0;
1387         else
1388                 return -EINVAL;
1389 }
1390
1391 /*
1392  * FIXME: This is an indirect way to check if a control exists at a
1393  * subdev. Instead of that hack, maybe the better would be to change all
1394  * subdevs to return -ENOIOCTLCMD, if an ioctl is not supported.
1395  */
1396 static int check_subdev_ctrl(struct em28xx *dev, int id)
1397 {
1398         struct v4l2_queryctrl qc;
1399
1400         memset(&qc, 0, sizeof(qc));
1401         qc.id = id;
1402
1403         /* enumerate V4L2 device controls */
1404         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc);
1405
1406         if (qc.type)
1407                 return 0;
1408         else
1409                 return -EINVAL;
1410 }
1411
1412 static int vidioc_g_ctrl(struct file *file, void *priv,
1413                                 struct v4l2_control *ctrl)
1414 {
1415         struct em28xx_fh      *fh  = priv;
1416         struct em28xx         *dev = fh->dev;
1417         int                   rc;
1418
1419         rc = check_dev(dev);
1420         if (rc < 0)
1421                 return rc;
1422         rc = 0;
1423
1424         /* Set an AC97 control */
1425         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1426                 rc = ac97_get_ctrl(dev, ctrl);
1427         else
1428                 rc = 1;
1429
1430         /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1431         if (rc == 1) {
1432                 if (check_subdev_ctrl(dev, ctrl->id))
1433                         return -EINVAL;
1434
1435                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1436                 rc = 0;
1437         }
1438
1439         return rc;
1440 }
1441
1442 static int vidioc_s_ctrl(struct file *file, void *priv,
1443                                 struct v4l2_control *ctrl)
1444 {
1445         struct em28xx_fh      *fh  = priv;
1446         struct em28xx         *dev = fh->dev;
1447         int                   rc;
1448
1449         rc = check_dev(dev);
1450         if (rc < 0)
1451                 return rc;
1452
1453         /* Set an AC97 control */
1454         if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1455                 rc = ac97_set_ctrl(dev, ctrl);
1456         else
1457                 rc = 1;
1458
1459         /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1460         if (rc == 1) {
1461                 rc = check_subdev_ctrl(dev, ctrl->id);
1462                 if (!rc)
1463                         v4l2_device_call_all(&dev->v4l2_dev, 0,
1464                                              core, s_ctrl, ctrl);
1465                 /*
1466                  * In the case of non-AC97 volume controls, we still need
1467                  * to do some setups at em28xx, in order to mute/unmute
1468                  * and to adjust audio volume. However, the value ranges
1469                  * should be checked by the corresponding V4L subdriver.
1470                  */
1471                 switch (ctrl->id) {
1472                 case V4L2_CID_AUDIO_MUTE:
1473                         dev->mute = ctrl->value;
1474                         rc = em28xx_audio_analog_set(dev);
1475                         break;
1476                 case V4L2_CID_AUDIO_VOLUME:
1477                         dev->volume = ctrl->value;
1478                         rc = em28xx_audio_analog_set(dev);
1479                 }
1480         }
1481         return (rc < 0) ? rc : 0;
1482 }
1483
1484 static int vidioc_g_tuner(struct file *file, void *priv,
1485                                 struct v4l2_tuner *t)
1486 {
1487         struct em28xx_fh      *fh  = priv;
1488         struct em28xx         *dev = fh->dev;
1489         int                   rc;
1490
1491         rc = check_dev(dev);
1492         if (rc < 0)
1493                 return rc;
1494
1495         if (0 != t->index)
1496                 return -EINVAL;
1497
1498         strcpy(t->name, "Tuner");
1499         t->type = V4L2_TUNER_ANALOG_TV;
1500
1501         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1502         return 0;
1503 }
1504
1505 static int vidioc_s_tuner(struct file *file, void *priv,
1506                                 struct v4l2_tuner *t)
1507 {
1508         struct em28xx_fh      *fh  = priv;
1509         struct em28xx         *dev = fh->dev;
1510         int                   rc;
1511
1512         rc = check_dev(dev);
1513         if (rc < 0)
1514                 return rc;
1515
1516         if (0 != t->index)
1517                 return -EINVAL;
1518
1519         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1520         return 0;
1521 }
1522
1523 static int vidioc_g_frequency(struct file *file, void *priv,
1524                                 struct v4l2_frequency *f)
1525 {
1526         struct em28xx_fh      *fh  = priv;
1527         struct em28xx         *dev = fh->dev;
1528
1529         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1530         f->frequency = dev->ctl_freq;
1531         return 0;
1532 }
1533
1534 static int vidioc_s_frequency(struct file *file, void *priv,
1535                                 struct v4l2_frequency *f)
1536 {
1537         struct em28xx_fh      *fh  = priv;
1538         struct em28xx         *dev = fh->dev;
1539         int                   rc;
1540
1541         rc = check_dev(dev);
1542         if (rc < 0)
1543                 return rc;
1544
1545         if (0 != f->tuner)
1546                 return -EINVAL;
1547
1548         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1549                 return -EINVAL;
1550         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1551                 return -EINVAL;
1552
1553         dev->ctl_freq = f->frequency;
1554         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1555
1556         return 0;
1557 }
1558
1559 #ifdef CONFIG_VIDEO_ADV_DEBUG
1560 static int em28xx_reg_len(int reg)
1561 {
1562         switch (reg) {
1563         case EM28XX_R40_AC97LSB:
1564         case EM28XX_R30_HSCALELOW:
1565         case EM28XX_R32_VSCALELOW:
1566                 return 2;
1567         default:
1568                 return 1;
1569         }
1570 }
1571
1572 static int vidioc_g_chip_ident(struct file *file, void *priv,
1573                struct v4l2_dbg_chip_ident *chip)
1574 {
1575         struct em28xx_fh      *fh  = priv;
1576         struct em28xx         *dev = fh->dev;
1577
1578         chip->ident = V4L2_IDENT_NONE;
1579         chip->revision = 0;
1580
1581         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1582
1583         return 0;
1584 }
1585
1586
1587 static int vidioc_g_register(struct file *file, void *priv,
1588                              struct v4l2_dbg_register *reg)
1589 {
1590         struct em28xx_fh      *fh  = priv;
1591         struct em28xx         *dev = fh->dev;
1592         int ret;
1593
1594         switch (reg->match.type) {
1595         case V4L2_CHIP_MATCH_AC97:
1596                 ret = em28xx_read_ac97(dev, reg->reg);
1597                 if (ret < 0)
1598                         return ret;
1599
1600                 reg->val = ret;
1601                 reg->size = 1;
1602                 return 0;
1603         case V4L2_CHIP_MATCH_I2C_DRIVER:
1604                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1605                 return 0;
1606         case V4L2_CHIP_MATCH_I2C_ADDR:
1607                 /* TODO: is this correct? */
1608                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1609                 return 0;
1610         default:
1611                 if (!v4l2_chip_match_host(&reg->match))
1612                         return -EINVAL;
1613         }
1614
1615         /* Match host */
1616         reg->size = em28xx_reg_len(reg->reg);
1617         if (reg->size == 1) {
1618                 ret = em28xx_read_reg(dev, reg->reg);
1619
1620                 if (ret < 0)
1621                         return ret;
1622
1623                 reg->val = ret;
1624         } else {
1625                 __le16 val = 0;
1626                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1627                                                    reg->reg, (char *)&val, 2);
1628                 if (ret < 0)
1629                         return ret;
1630
1631                 reg->val = le16_to_cpu(val);
1632         }
1633
1634         return 0;
1635 }
1636
1637 static int vidioc_s_register(struct file *file, void *priv,
1638                              struct v4l2_dbg_register *reg)
1639 {
1640         struct em28xx_fh      *fh  = priv;
1641         struct em28xx         *dev = fh->dev;
1642         __le16 buf;
1643
1644         switch (reg->match.type) {
1645         case V4L2_CHIP_MATCH_AC97:
1646                 return em28xx_write_ac97(dev, reg->reg, reg->val);
1647         case V4L2_CHIP_MATCH_I2C_DRIVER:
1648                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1649                 return 0;
1650         case V4L2_CHIP_MATCH_I2C_ADDR:
1651                 /* TODO: is this correct? */
1652                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1653                 return 0;
1654         default:
1655                 if (!v4l2_chip_match_host(&reg->match))
1656                         return -EINVAL;
1657         }
1658
1659         /* Match host */
1660         buf = cpu_to_le16(reg->val);
1661
1662         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1663                                em28xx_reg_len(reg->reg));
1664 }
1665 #endif
1666
1667
1668 static int vidioc_cropcap(struct file *file, void *priv,
1669                                         struct v4l2_cropcap *cc)
1670 {
1671         struct em28xx_fh      *fh  = priv;
1672         struct em28xx         *dev = fh->dev;
1673
1674         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1675                 return -EINVAL;
1676
1677         cc->bounds.left = 0;
1678         cc->bounds.top = 0;
1679         cc->bounds.width = dev->width;
1680         cc->bounds.height = dev->height;
1681         cc->defrect = cc->bounds;
1682         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1683         cc->pixelaspect.denominator = 59;
1684
1685         return 0;
1686 }
1687
1688 static int vidioc_streamon(struct file *file, void *priv,
1689                                         enum v4l2_buf_type type)
1690 {
1691         struct em28xx_fh      *fh  = priv;
1692         struct em28xx         *dev = fh->dev;
1693         int                   rc = -EINVAL;
1694
1695         rc = check_dev(dev);
1696         if (rc < 0)
1697                 return rc;
1698
1699         if (unlikely(type != fh->type))
1700                 return -EINVAL;
1701
1702         em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1703                         fh, type, fh->resources, dev->resources);
1704
1705         if (unlikely(!res_get(fh, get_ressource(fh))))
1706                 return -EBUSY;
1707
1708         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1709                 rc = videobuf_streamon(&fh->vb_vidq);
1710         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1711                 rc = videobuf_streamon(&fh->vb_vbiq);
1712
1713         return rc;
1714 }
1715
1716 static int vidioc_streamoff(struct file *file, void *priv,
1717                                         enum v4l2_buf_type type)
1718 {
1719         struct em28xx_fh      *fh  = priv;
1720         struct em28xx         *dev = fh->dev;
1721         int                   rc;
1722
1723         rc = check_dev(dev);
1724         if (rc < 0)
1725                 return rc;
1726
1727         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1728             fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1729                 return -EINVAL;
1730         if (type != fh->type)
1731                 return -EINVAL;
1732
1733         em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1734                         fh, type, fh->resources, dev->resources);
1735
1736         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1737                 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
1738                         videobuf_streamoff(&fh->vb_vidq);
1739                         res_free(fh, EM28XX_RESOURCE_VIDEO);
1740                 }
1741         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1742                 if (res_check(fh, EM28XX_RESOURCE_VBI)) {
1743                         videobuf_streamoff(&fh->vb_vbiq);
1744                         res_free(fh, EM28XX_RESOURCE_VBI);
1745                 }
1746         }
1747
1748         return 0;
1749 }
1750
1751 static int vidioc_querycap(struct file *file, void  *priv,
1752                                         struct v4l2_capability *cap)
1753 {
1754         struct em28xx_fh      *fh  = priv;
1755         struct em28xx         *dev = fh->dev;
1756
1757         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1758         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1759         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1760
1761         cap->capabilities =
1762                         V4L2_CAP_SLICED_VBI_CAPTURE |
1763                         V4L2_CAP_VIDEO_CAPTURE |
1764                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1765
1766         if (dev->vbi_dev)
1767                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1768
1769         if (dev->audio_mode.has_audio)
1770                 cap->capabilities |= V4L2_CAP_AUDIO;
1771
1772         if (dev->tuner_type != TUNER_ABSENT)
1773                 cap->capabilities |= V4L2_CAP_TUNER;
1774
1775         return 0;
1776 }
1777
1778 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1779                                         struct v4l2_fmtdesc *f)
1780 {
1781         if (unlikely(f->index >= ARRAY_SIZE(format)))
1782                 return -EINVAL;
1783
1784         strlcpy(f->description, format[f->index].name, sizeof(f->description));
1785         f->pixelformat = format[f->index].fourcc;
1786
1787         return 0;
1788 }
1789
1790 /* Sliced VBI ioctls */
1791 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1792                                         struct v4l2_format *f)
1793 {
1794         struct em28xx_fh      *fh  = priv;
1795         struct em28xx         *dev = fh->dev;
1796         int                   rc;
1797
1798         rc = check_dev(dev);
1799         if (rc < 0)
1800                 return rc;
1801
1802         f->fmt.sliced.service_set = 0;
1803         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1804
1805         if (f->fmt.sliced.service_set == 0)
1806                 rc = -EINVAL;
1807
1808         return rc;
1809 }
1810
1811 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1812                         struct v4l2_format *f)
1813 {
1814         struct em28xx_fh      *fh  = priv;
1815         struct em28xx         *dev = fh->dev;
1816         int                   rc;
1817
1818         rc = check_dev(dev);
1819         if (rc < 0)
1820                 return rc;
1821
1822         v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1823
1824         if (f->fmt.sliced.service_set == 0)
1825                 return -EINVAL;
1826
1827         return 0;
1828 }
1829
1830 /* RAW VBI ioctls */
1831
1832 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1833                                 struct v4l2_format *format)
1834 {
1835         struct em28xx_fh      *fh  = priv;
1836         struct em28xx         *dev = fh->dev;
1837
1838         format->fmt.vbi.samples_per_line = dev->vbi_width;
1839         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1840         format->fmt.vbi.offset = 0;
1841         format->fmt.vbi.flags = 0;
1842         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1843         format->fmt.vbi.count[0] = dev->vbi_height;
1844         format->fmt.vbi.count[1] = dev->vbi_height;
1845
1846         /* Varies by video standard (NTSC, PAL, etc.) */
1847         if (dev->norm & V4L2_STD_525_60) {
1848                 /* NTSC */
1849                 format->fmt.vbi.start[0] = 10;
1850                 format->fmt.vbi.start[1] = 273;
1851         } else if (dev->norm & V4L2_STD_625_50) {
1852                 /* PAL */
1853                 format->fmt.vbi.start[0] = 6;
1854                 format->fmt.vbi.start[1] = 318;
1855         }
1856
1857         return 0;
1858 }
1859
1860 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1861                                 struct v4l2_format *format)
1862 {
1863         struct em28xx_fh      *fh  = priv;
1864         struct em28xx         *dev = fh->dev;
1865
1866         format->fmt.vbi.samples_per_line = dev->vbi_width;
1867         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1868         format->fmt.vbi.offset = 0;
1869         format->fmt.vbi.flags = 0;
1870         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1871         format->fmt.vbi.count[0] = dev->vbi_height;
1872         format->fmt.vbi.count[1] = dev->vbi_height;
1873
1874         /* Varies by video standard (NTSC, PAL, etc.) */
1875         if (dev->norm & V4L2_STD_525_60) {
1876                 /* NTSC */
1877                 format->fmt.vbi.start[0] = 10;
1878                 format->fmt.vbi.start[1] = 273;
1879         } else if (dev->norm & V4L2_STD_625_50) {
1880                 /* PAL */
1881                 format->fmt.vbi.start[0] = 6;
1882                 format->fmt.vbi.start[1] = 318;
1883         }
1884
1885         return 0;
1886 }
1887
1888 static int vidioc_reqbufs(struct file *file, void *priv,
1889                           struct v4l2_requestbuffers *rb)
1890 {
1891         struct em28xx_fh      *fh  = priv;
1892         struct em28xx         *dev = fh->dev;
1893         int                   rc;
1894
1895         rc = check_dev(dev);
1896         if (rc < 0)
1897                 return rc;
1898
1899         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1900                 return videobuf_reqbufs(&fh->vb_vidq, rb);
1901         else
1902                 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1903 }
1904
1905 static int vidioc_querybuf(struct file *file, void *priv,
1906                            struct v4l2_buffer *b)
1907 {
1908         struct em28xx_fh      *fh  = priv;
1909         struct em28xx         *dev = fh->dev;
1910         int                   rc;
1911
1912         rc = check_dev(dev);
1913         if (rc < 0)
1914                 return rc;
1915
1916         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1917                 return videobuf_querybuf(&fh->vb_vidq, b);
1918         else {
1919                 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1920                    the videobuf framework, but we probably shouldn't be
1921                    returning a buffer larger than that which was asked for.
1922                    At a minimum, it causes a crash in zvbi since it does
1923                    a memcpy based on the source buffer length */
1924                 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1925                 b->length = dev->vbi_width * dev->vbi_height * 2;
1926
1927                 return result;
1928         }
1929 }
1930
1931 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1932 {
1933         struct em28xx_fh      *fh  = priv;
1934         struct em28xx         *dev = fh->dev;
1935         int                   rc;
1936
1937         rc = check_dev(dev);
1938         if (rc < 0)
1939                 return rc;
1940
1941         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1942                 return videobuf_qbuf(&fh->vb_vidq, b);
1943         else
1944                 return videobuf_qbuf(&fh->vb_vbiq, b);
1945 }
1946
1947 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1948 {
1949         struct em28xx_fh      *fh  = priv;
1950         struct em28xx         *dev = fh->dev;
1951         int                   rc;
1952
1953         rc = check_dev(dev);
1954         if (rc < 0)
1955                 return rc;
1956
1957         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1958                 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1959                                       O_NONBLOCK);
1960         else
1961                 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1962                                       O_NONBLOCK);
1963 }
1964
1965 /* ----------------------------------------------------------- */
1966 /* RADIO ESPECIFIC IOCTLS                                      */
1967 /* ----------------------------------------------------------- */
1968
1969 static int radio_querycap(struct file *file, void  *priv,
1970                           struct v4l2_capability *cap)
1971 {
1972         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1973
1974         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1975         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1976         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1977
1978         cap->capabilities = V4L2_CAP_TUNER;
1979         return 0;
1980 }
1981
1982 static int radio_g_tuner(struct file *file, void *priv,
1983                          struct v4l2_tuner *t)
1984 {
1985         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1986
1987         if (unlikely(t->index > 0))
1988                 return -EINVAL;
1989
1990         strcpy(t->name, "Radio");
1991         t->type = V4L2_TUNER_RADIO;
1992
1993         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1994
1995         return 0;
1996 }
1997
1998 static int radio_enum_input(struct file *file, void *priv,
1999                             struct v4l2_input *i)
2000 {
2001         if (i->index != 0)
2002                 return -EINVAL;
2003         strcpy(i->name, "Radio");
2004         i->type = V4L2_INPUT_TYPE_TUNER;
2005
2006         return 0;
2007 }
2008
2009 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2010 {
2011         if (unlikely(a->index))
2012                 return -EINVAL;
2013
2014         strcpy(a->name, "Radio");
2015         return 0;
2016 }
2017
2018 static int radio_s_tuner(struct file *file, void *priv,
2019                          struct v4l2_tuner *t)
2020 {
2021         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2022
2023         if (0 != t->index)
2024                 return -EINVAL;
2025
2026         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2027
2028         return 0;
2029 }
2030
2031 static int radio_s_audio(struct file *file, void *fh,
2032                          struct v4l2_audio *a)
2033 {
2034         return 0;
2035 }
2036
2037 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2038 {
2039         return 0;
2040 }
2041
2042 static int radio_queryctrl(struct file *file, void *priv,
2043                            struct v4l2_queryctrl *qc)
2044 {
2045         int i;
2046
2047         if (qc->id <  V4L2_CID_BASE ||
2048                 qc->id >= V4L2_CID_LASTP1)
2049                 return -EINVAL;
2050
2051         for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2052                 if (qc->id && qc->id == ac97_qctrl[i].id) {
2053                         memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2054                         return 0;
2055                 }
2056         }
2057
2058         return -EINVAL;
2059 }
2060
2061 /*
2062  * em28xx_v4l2_open()
2063  * inits the device and starts isoc transfer
2064  */
2065 static int em28xx_v4l2_open(struct file *filp)
2066 {
2067         int errCode = 0, radio = 0;
2068         struct video_device *vdev = video_devdata(filp);
2069         struct em28xx *dev = video_drvdata(filp);
2070         enum v4l2_buf_type fh_type = 0;
2071         struct em28xx_fh *fh;
2072         enum v4l2_field field;
2073
2074         switch (vdev->vfl_type) {
2075         case VFL_TYPE_GRABBER:
2076                 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2077                 break;
2078         case VFL_TYPE_VBI:
2079                 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2080                 break;
2081         case VFL_TYPE_RADIO:
2082                 radio = 1;
2083                 break;
2084         }
2085
2086         em28xx_videodbg("open dev=%s type=%s users=%d\n",
2087                         video_device_node_name(vdev), v4l2_type_names[fh_type],
2088                         dev->users);
2089
2090
2091         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2092         if (!fh) {
2093                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2094                 return -ENOMEM;
2095         }
2096         fh->dev = dev;
2097         fh->radio = radio;
2098         fh->type = fh_type;
2099         filp->private_data = fh;
2100
2101         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2102                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2103                 em28xx_set_alternate(dev);
2104                 em28xx_resolution_set(dev);
2105
2106                 /* Needed, since GPIO might have disabled power of
2107                    some i2c device
2108                  */
2109                 em28xx_wake_i2c(dev);
2110
2111         }
2112         if (fh->radio) {
2113                 em28xx_videodbg("video_open: setting radio device\n");
2114                 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2115         }
2116
2117         dev->users++;
2118
2119         if (dev->progressive)
2120                 field = V4L2_FIELD_NONE;
2121         else
2122                 field = V4L2_FIELD_INTERLACED;
2123
2124         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2125                                     NULL, &dev->slock,
2126                                     V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2127                                     sizeof(struct em28xx_buffer), fh, &dev->lock);
2128
2129         videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2130                                     NULL, &dev->slock,
2131                                     V4L2_BUF_TYPE_VBI_CAPTURE,
2132                                     V4L2_FIELD_SEQ_TB,
2133                                     sizeof(struct em28xx_buffer), fh, &dev->lock);
2134
2135         return errCode;
2136 }
2137
2138 /*
2139  * em28xx_realease_resources()
2140  * unregisters the v4l2,i2c and usb devices
2141  * called when the device gets disconected or at module unload
2142 */
2143 void em28xx_release_analog_resources(struct em28xx *dev)
2144 {
2145
2146         /*FIXME: I2C IR should be disconnected */
2147
2148         if (dev->radio_dev) {
2149                 if (video_is_registered(dev->radio_dev))
2150                         video_unregister_device(dev->radio_dev);
2151                 else
2152                         video_device_release(dev->radio_dev);
2153                 dev->radio_dev = NULL;
2154         }
2155         if (dev->vbi_dev) {
2156                 em28xx_info("V4L2 device %s deregistered\n",
2157                             video_device_node_name(dev->vbi_dev));
2158                 if (video_is_registered(dev->vbi_dev))
2159                         video_unregister_device(dev->vbi_dev);
2160                 else
2161                         video_device_release(dev->vbi_dev);
2162                 dev->vbi_dev = NULL;
2163         }
2164         if (dev->vdev) {
2165                 em28xx_info("V4L2 device %s deregistered\n",
2166                             video_device_node_name(dev->vdev));
2167                 if (video_is_registered(dev->vdev))
2168                         video_unregister_device(dev->vdev);
2169                 else
2170                         video_device_release(dev->vdev);
2171                 dev->vdev = NULL;
2172         }
2173 }
2174
2175 /*
2176  * em28xx_v4l2_close()
2177  * stops streaming and deallocates all resources allocated by the v4l2
2178  * calls and ioctls
2179  */
2180 static int em28xx_v4l2_close(struct file *filp)
2181 {
2182         struct em28xx_fh *fh  = filp->private_data;
2183         struct em28xx    *dev = fh->dev;
2184         int              errCode;
2185
2186         em28xx_videodbg("users=%d\n", dev->users);
2187
2188         if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2189                 videobuf_stop(&fh->vb_vidq);
2190                 res_free(fh, EM28XX_RESOURCE_VIDEO);
2191         }
2192
2193         if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2194                 videobuf_stop(&fh->vb_vbiq);
2195                 res_free(fh, EM28XX_RESOURCE_VBI);
2196         }
2197
2198         if (dev->users == 1) {
2199                 /* the device is already disconnect,
2200                    free the remaining resources */
2201                 if (dev->state & DEV_DISCONNECTED) {
2202                         em28xx_release_resources(dev);
2203                         kfree(dev);
2204                         return 0;
2205                 }
2206
2207                 /* Save some power by putting tuner to sleep */
2208                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
2209
2210                 /* do this before setting alternate! */
2211                 em28xx_uninit_isoc(dev);
2212                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2213
2214                 /* set alternate 0 */
2215                 dev->alt = 0;
2216                 em28xx_videodbg("setting alternate 0\n");
2217                 errCode = usb_set_interface(dev->udev, 0, 0);
2218                 if (errCode < 0) {
2219                         em28xx_errdev("cannot change alternate number to "
2220                                         "0 (error=%i)\n", errCode);
2221                 }
2222         }
2223
2224         videobuf_mmap_free(&fh->vb_vidq);
2225         videobuf_mmap_free(&fh->vb_vbiq);
2226         kfree(fh);
2227         dev->users--;
2228         wake_up_interruptible_nr(&dev->open, 1);
2229         return 0;
2230 }
2231
2232 /*
2233  * em28xx_v4l2_read()
2234  * will allocate buffers when called for the first time
2235  */
2236 static ssize_t
2237 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2238                  loff_t *pos)
2239 {
2240         struct em28xx_fh *fh = filp->private_data;
2241         struct em28xx *dev = fh->dev;
2242         int rc;
2243
2244         rc = check_dev(dev);
2245         if (rc < 0)
2246                 return rc;
2247
2248         /* FIXME: read() is not prepared to allow changing the video
2249            resolution while streaming. Seems a bug at em28xx_set_fmt
2250          */
2251
2252         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2253                 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2254                         return -EBUSY;
2255
2256                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2257                                         filp->f_flags & O_NONBLOCK);
2258         }
2259
2260
2261         if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2262                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2263                         return -EBUSY;
2264
2265                 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2266                                         filp->f_flags & O_NONBLOCK);
2267         }
2268
2269         return 0;
2270 }
2271
2272 /*
2273  * em28xx_v4l2_poll()
2274  * will allocate buffers when called for the first time
2275  */
2276 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2277 {
2278         struct em28xx_fh *fh = filp->private_data;
2279         struct em28xx *dev = fh->dev;
2280         int rc;
2281
2282         rc = check_dev(dev);
2283         if (rc < 0)
2284                 return rc;
2285
2286         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2287                 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2288                         return POLLERR;
2289                 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2290         } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2291                 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2292                         return POLLERR;
2293                 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2294         } else {
2295                 return POLLERR;
2296         }
2297 }
2298
2299 /*
2300  * em28xx_v4l2_mmap()
2301  */
2302 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2303 {
2304         struct em28xx_fh *fh    = filp->private_data;
2305         struct em28xx    *dev   = fh->dev;
2306         int              rc;
2307
2308         rc = check_dev(dev);
2309         if (rc < 0)
2310                 return rc;
2311
2312         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2313                 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2314         else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2315                 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2316
2317         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2318                 (unsigned long)vma->vm_start,
2319                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2320                 rc);
2321
2322         return rc;
2323 }
2324
2325 static const struct v4l2_file_operations em28xx_v4l_fops = {
2326         .owner         = THIS_MODULE,
2327         .open          = em28xx_v4l2_open,
2328         .release       = em28xx_v4l2_close,
2329         .read          = em28xx_v4l2_read,
2330         .poll          = em28xx_v4l2_poll,
2331         .mmap          = em28xx_v4l2_mmap,
2332         .unlocked_ioctl = video_ioctl2,
2333 };
2334
2335 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2336         .vidioc_querycap            = vidioc_querycap,
2337         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2338         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2339         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2340         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2341         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2342         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
2343         .vidioc_g_audio             = vidioc_g_audio,
2344         .vidioc_s_audio             = vidioc_s_audio,
2345         .vidioc_cropcap             = vidioc_cropcap,
2346
2347         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
2348         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2349         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
2350
2351         .vidioc_reqbufs             = vidioc_reqbufs,
2352         .vidioc_querybuf            = vidioc_querybuf,
2353         .vidioc_qbuf                = vidioc_qbuf,
2354         .vidioc_dqbuf               = vidioc_dqbuf,
2355         .vidioc_g_std               = vidioc_g_std,
2356         .vidioc_s_std               = vidioc_s_std,
2357         .vidioc_g_parm              = vidioc_g_parm,
2358         .vidioc_s_parm              = vidioc_s_parm,
2359         .vidioc_enum_input          = vidioc_enum_input,
2360         .vidioc_g_input             = vidioc_g_input,
2361         .vidioc_s_input             = vidioc_s_input,
2362         .vidioc_queryctrl           = vidioc_queryctrl,
2363         .vidioc_g_ctrl              = vidioc_g_ctrl,
2364         .vidioc_s_ctrl              = vidioc_s_ctrl,
2365         .vidioc_streamon            = vidioc_streamon,
2366         .vidioc_streamoff           = vidioc_streamoff,
2367         .vidioc_g_tuner             = vidioc_g_tuner,
2368         .vidioc_s_tuner             = vidioc_s_tuner,
2369         .vidioc_g_frequency         = vidioc_g_frequency,
2370         .vidioc_s_frequency         = vidioc_s_frequency,
2371 #ifdef CONFIG_VIDEO_ADV_DEBUG
2372         .vidioc_g_register          = vidioc_g_register,
2373         .vidioc_s_register          = vidioc_s_register,
2374         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
2375 #endif
2376 };
2377
2378 static const struct video_device em28xx_video_template = {
2379         .fops                       = &em28xx_v4l_fops,
2380         .release                    = video_device_release,
2381         .ioctl_ops                  = &video_ioctl_ops,
2382
2383         .tvnorms                    = V4L2_STD_ALL,
2384         .current_norm               = V4L2_STD_PAL,
2385 };
2386
2387 static const struct v4l2_file_operations radio_fops = {
2388         .owner         = THIS_MODULE,
2389         .open          = em28xx_v4l2_open,
2390         .release       = em28xx_v4l2_close,
2391         .unlocked_ioctl = video_ioctl2,
2392 };
2393
2394 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2395         .vidioc_querycap      = radio_querycap,
2396         .vidioc_g_tuner       = radio_g_tuner,
2397         .vidioc_enum_input    = radio_enum_input,
2398         .vidioc_g_audio       = radio_g_audio,
2399         .vidioc_s_tuner       = radio_s_tuner,
2400         .vidioc_s_audio       = radio_s_audio,
2401         .vidioc_s_input       = radio_s_input,
2402         .vidioc_queryctrl     = radio_queryctrl,
2403         .vidioc_g_ctrl        = vidioc_g_ctrl,
2404         .vidioc_s_ctrl        = vidioc_s_ctrl,
2405         .vidioc_g_frequency   = vidioc_g_frequency,
2406         .vidioc_s_frequency   = vidioc_s_frequency,
2407 #ifdef CONFIG_VIDEO_ADV_DEBUG
2408         .vidioc_g_register    = vidioc_g_register,
2409         .vidioc_s_register    = vidioc_s_register,
2410 #endif
2411 };
2412
2413 static struct video_device em28xx_radio_template = {
2414         .name                 = "em28xx-radio",
2415         .fops                 = &radio_fops,
2416         .ioctl_ops            = &radio_ioctl_ops,
2417 };
2418
2419 /******************************** usb interface ******************************/
2420
2421
2422
2423 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2424                                         const struct video_device *template,
2425                                         const char *type_name)
2426 {
2427         struct video_device *vfd;
2428
2429         vfd = video_device_alloc();
2430         if (NULL == vfd)
2431                 return NULL;
2432
2433         *vfd            = *template;
2434         vfd->v4l2_dev   = &dev->v4l2_dev;
2435         vfd->release    = video_device_release;
2436         vfd->debug      = video_debug;
2437         vfd->lock       = &dev->lock;
2438
2439         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2440                  dev->name, type_name);
2441
2442         video_set_drvdata(vfd, dev);
2443         return vfd;
2444 }
2445
2446 int em28xx_register_analog_devices(struct em28xx *dev)
2447 {
2448       u8 val;
2449         int ret;
2450
2451         printk(KERN_INFO "%s: v4l2 driver version %s\n",
2452                 dev->name, EM28XX_VERSION);
2453
2454         /* set default norm */
2455         dev->norm = em28xx_video_template.current_norm;
2456         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
2457         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2458         dev->ctl_input = 0;
2459
2460         /* Analog specific initialization */
2461         dev->format = &format[0];
2462         em28xx_set_video_format(dev, format[0].fourcc,
2463                                 norm_maxw(dev), norm_maxh(dev));
2464
2465         video_mux(dev, dev->ctl_input);
2466
2467         /* Audio defaults */
2468         dev->mute = 1;
2469         dev->volume = 0x1f;
2470
2471 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2472         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2473         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2474                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2475
2476         em28xx_set_outfmt(dev);
2477         em28xx_colorlevels_set_default(dev);
2478         em28xx_compression_disable(dev);
2479
2480         /* allocate and fill video video_device struct */
2481         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2482         if (!dev->vdev) {
2483                 em28xx_errdev("cannot allocate video_device.\n");
2484                 return -ENODEV;
2485         }
2486
2487         /* register v4l2 video video_device */
2488         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2489                                        video_nr[dev->devno]);
2490         if (ret) {
2491                 em28xx_errdev("unable to register video device (error=%i).\n",
2492                               ret);
2493                 return ret;
2494         }
2495
2496         /* Allocate and fill vbi video_device struct */
2497         if (em28xx_vbi_supported(dev) == 1) {
2498                 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2499                                                 "vbi");
2500
2501                 /* register v4l2 vbi video_device */
2502                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2503                                             vbi_nr[dev->devno]);
2504                 if (ret < 0) {
2505                         em28xx_errdev("unable to register vbi device\n");
2506                         return ret;
2507                 }
2508         }
2509
2510         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2511                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2512                                                   "radio");
2513                 if (!dev->radio_dev) {
2514                         em28xx_errdev("cannot allocate video_device.\n");
2515                         return -ENODEV;
2516                 }
2517                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2518                                             radio_nr[dev->devno]);
2519                 if (ret < 0) {
2520                         em28xx_errdev("can't register radio device\n");
2521                         return ret;
2522                 }
2523                 em28xx_info("Registered radio device as %s\n",
2524                             video_device_node_name(dev->radio_dev));
2525         }
2526
2527         em28xx_info("V4L2 video device registered as %s\n",
2528                     video_device_node_name(dev->vdev));
2529
2530         if (dev->vbi_dev)
2531                 em28xx_info("V4L2 VBI device registered as %s\n",
2532                             video_device_node_name(dev->vbi_dev));
2533
2534         return 0;
2535 }