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

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   3
   4    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   5                       Markus Rechberger <mrechberger@gmail.com>
   6                       Mauro Carvalho Chehab <mchehab@infradead.org>
   7                       Sascha Sommer <saschasommer@freenet.de>
   8
   9         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  10                 by Luca Risolia <luca.risolia@studio.unibo.it>
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 2 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/init.h>
  28 #include <linux/list.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/bitmap.h>
  32 #include <linux/usb.h>
  33 #include <linux/i2c.h>
  34 #include <linux/version.h>
  35 #include <linux/mm.h>
  36 #include <linux/mutex.h>
  37
  38 #include "em28xx.h"
  39 #include <media/v4l2-common.h>
  40 #include <media/msp3400.h>
  41 #include <media/tuner.h>
  42
  43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  44                       "Markus Rechberger <mrechberger@gmail.com>, " \
  45                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  46                       "Sascha Sommer <saschasommer@freenet.de>"
  47
  48 #define DRIVER_NAME         "em28xx"
  49 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  50 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 0)
  51
  52 #define em28xx_videodbg(fmt, arg...) do {\
  53         if (video_debug) \
  54                 printk(KERN_INFO "%s %s :"fmt, \
  55                          dev->name, __func__ , ##arg); } while (0)
  56
  57 static unsigned int isoc_debug;
  58 module_param(isoc_debug, int, 0644);
  59 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  60
  61 #define em28xx_isocdbg(fmt, arg...) do {\
  62         if (isoc_debug) \
  63                 printk(KERN_INFO "%s %s :"fmt, \
  64                          dev->name, __func__ , ##arg); } while (0)
  65
  66 #define BUFFER_TIMEOUT     msecs_to_jiffies(2000)  /* 2 seconds */
  67
  68 /* Limits minimum and default number of buffers */
  69 #define EM28XX_MIN_BUF 4
  70 #define EM28XX_DEF_BUF 8
  71
  72 MODULE_AUTHOR(DRIVER_AUTHOR);
  73 MODULE_DESCRIPTION(DRIVER_DESC);
  74 MODULE_LICENSE("GPL");
  75
  76 static LIST_HEAD(em28xx_devlist);
  77
  78 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  80 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  81 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  82
  83 module_param_array(card,  int, NULL, 0444);
  84 module_param_array(video_nr, int, NULL, 0444);
  85 module_param_array(vbi_nr, int, NULL, 0444);
  86 module_param_array(radio_nr, int, NULL, 0444);
  87 MODULE_PARM_DESC(card,     "card type");
  88 MODULE_PARM_DESC(video_nr, "video device numbers");
  89 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  90 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  91
  92 static unsigned int video_debug;
  93 module_param(video_debug,int,0644);
  94 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  95
  96 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  97 static unsigned long em28xx_devused;
  98
  99 /* supported controls */
 100 /* Common to all boards */
 101 static struct v4l2_queryctrl em28xx_qctrl[] = {
 102         {
 103                 .id = V4L2_CID_AUDIO_VOLUME,
 104                 .type = V4L2_CTRL_TYPE_INTEGER,
 105                 .name = "Volume",
 106                 .minimum = 0x0,
 107                 .maximum = 0x1f,
 108                 .step = 0x1,
 109                 .default_value = 0x1f,
 110                 .flags = 0,
 111         },{
 112                 .id = V4L2_CID_AUDIO_MUTE,
 113                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 114                 .name = "Mute",
 115                 .minimum = 0,
 116                 .maximum = 1,
 117                 .step = 1,
 118                 .default_value = 1,
 119                 .flags = 0,
 120         }
 121 };
 122
 123 static struct usb_driver em28xx_usb_driver;
 124
 125 /* ------------------------------------------------------------------
 126         DMA and thread functions
 127    ------------------------------------------------------------------*/
 128
 129 /*
 130  * Announces that a buffer were filled and request the next
 131  */
 132 static inline void buffer_filled(struct em28xx *dev,
 133                                   struct em28xx_dmaqueue *dma_q,
 134                                   struct em28xx_buffer *buf)
 135 {
 136         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 137
 138         /* Nobody is waiting something to be done, just return */
 139         if (!waitqueue_active(&buf->vb.done)) {
 140                 printk(KERN_ERR "em28xx: buffer underrun at %ld\n",
 141                                 jiffies);
 142
 143                 return;
 144         }
 145
 146         /* Advice that buffer was filled */
 147         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 148         buf->vb.state = VIDEOBUF_DONE;
 149         buf->vb.field_count++;
 150         do_gettimeofday(&buf->vb.ts);
 151
 152         list_del(&buf->vb.queue);
 153         wake_up(&buf->vb.done);
 154 }
 155
 156 /*
 157  * Identify the buffer header type and properly handles
 158  */
 159 static void em28xx_copy_video(struct em28xx *dev,
 160                               struct em28xx_dmaqueue  *dma_q,
 161                               struct em28xx_buffer *buf,
 162                               unsigned char *p,
 163                               unsigned char *outp, unsigned long len)
 164 {
 165         void *fieldstart, *startwrite, *startread;
 166         int  linesdone, currlinedone, offset, lencopy, remain;
 167
 168         if (dev->frame_size != buf->vb.size) {
 169                 em28xx_errdev("size %i and buf.length %lu are different!\n",
 170                            dev->frame_size, buf->vb.size);
 171                 return;
 172         }
 173
 174         if (dma_q->pos + len > buf->vb.size)
 175                 len = buf->vb.size - dma_q->pos;
 176
 177         if (p[0] != 0x88 && p[0] != 0x22) {
 178                 em28xx_isocdbg("frame is not complete\n");
 179                 len += 4;
 180         } else
 181                 p += 4;
 182
 183         startread = p;
 184         remain = len;
 185
 186         /* Interlaces frame */
 187         if (buf->top_field)
 188                 fieldstart = outp;
 189         else
 190                 fieldstart = outp + dev->bytesperline;
 191
 192         linesdone = dma_q->pos / dev->bytesperline;
 193         currlinedone = dma_q->pos % dev->bytesperline;
 194         offset = linesdone * dev->bytesperline * 2 + currlinedone;
 195         startwrite = fieldstart + offset;
 196         lencopy = dev->bytesperline - currlinedone;
 197         lencopy = lencopy > remain ? remain : lencopy;
 198
 199         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 200                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 201                                ((char *)startwrite + lencopy) -
 202                                ((char *)outp + buf->vb.size));
 203                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 204         }
 205         BUG_ON(lencopy <= 0);
 206         memcpy(startwrite, startread, lencopy);
 207
 208         remain -= lencopy;
 209
 210         while (remain > 0) {
 211                 startwrite += lencopy + dev->bytesperline;
 212                 startread += lencopy;
 213                 if (dev->bytesperline > remain)
 214                         lencopy = remain;
 215                 else
 216                         lencopy = dev->bytesperline;
 217
 218                 BUG_ON(lencopy <= 0);
 219
 220                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 221                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 222                                        ((char *)startwrite + lencopy) -
 223                                        ((char *)outp + buf->vb.size));
 224                         lencopy = remain = (char *)outp + buf->vb.size -
 225                                            (char *)startwrite;
 226                 }
 227                 if (lencopy <= 0)
 228                         break;
 229
 230                 memcpy(startwrite, startread, lencopy);
 231
 232                 remain -= lencopy;
 233         }
 234
 235         dma_q->pos += len;
 236 }
 237
 238 static inline void print_err_status(struct em28xx *dev,
 239                                      int packet, int status)
 240 {
 241         char *errmsg = "Unknown";
 242
 243         switch (status) {
 244         case -ENOENT:
 245                 errmsg = "unlinked synchronuously";
 246                 break;
 247         case -ECONNRESET:
 248                 errmsg = "unlinked asynchronuously";
 249                 break;
 250         case -ENOSR:
 251                 errmsg = "Buffer error (overrun)";
 252                 break;
 253         case -EPIPE:
 254                 errmsg = "Stalled (device not responding)";
 255                 break;
 256         case -EOVERFLOW:
 257                 errmsg = "Babble (bad cable?)";
 258                 break;
 259         case -EPROTO:
 260                 errmsg = "Bit-stuff error (bad cable?)";
 261                 break;
 262         case -EILSEQ:
 263                 errmsg = "CRC/Timeout (could be anything)";
 264                 break;
 265         case -ETIME:
 266                 errmsg = "Device does not respond";
 267                 break;
 268         }
 269         if (packet < 0) {
 270                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 271         } else {
 272                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 273                                packet, status, errmsg);
 274         }
 275 }
 276
 277 /*
 278  * video-buf generic routine to get the next available buffer
 279  */
 280 static inline int get_next_buf(struct em28xx_dmaqueue *dma_q,
 281                                           struct em28xx_buffer **buf)
 282 {
 283         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 284
 285         if (list_empty(&dma_q->active)) {
 286                 em28xx_isocdbg("No active queue to serve\n");
 287                 return 0;
 288         }
 289
 290         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 291
 292         return 1;
 293 }
 294
 295 /*
 296  * Controls the isoc copy of each urb packet
 297  */
 298 static inline int em28xx_isoc_copy(struct urb *urb)
 299 {
 300         struct em28xx_buffer    *buf;
 301         struct em28xx_dmaqueue  *dma_q = urb->context;
 302         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 303         unsigned char *outp;
 304         int i, len = 0, rc = 1;
 305         unsigned char *p;
 306
 307         if (!dev)
 308                 return 0;
 309
 310         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 311                 return 0;
 312
 313         if (urb->status < 0) {
 314                 print_err_status(dev, -1, urb->status);
 315                 if (urb->status == -ENOENT)
 316                         return 0;
 317         }
 318
 319         buf = dev->isoc_ctl.buf;
 320
 321         if (!buf) {
 322                 rc = get_next_buf(dma_q, &buf);
 323                 if (rc <= 0)
 324                         return rc;
 325         }
 326
 327         outp = videobuf_to_vmalloc(&buf->vb);
 328
 329
 330         for (i = 0; i < urb->number_of_packets; i++) {
 331                 int status = urb->iso_frame_desc[i].status;
 332
 333                 if (status < 0) {
 334                         print_err_status(dev, i, status);
 335                         if (urb->iso_frame_desc[i].status != -EPROTO)
 336                                 continue;
 337                 }
 338
 339                 len = urb->iso_frame_desc[i].actual_length - 4;
 340
 341                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 342                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 343                         continue;
 344                 }
 345                 if (urb->iso_frame_desc[i].actual_length >
 346                                                 dev->max_pkt_size) {
 347                         em28xx_isocdbg("packet bigger than packet size");
 348                         continue;
 349                 }
 350
 351                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 352
 353                 /* FIXME: incomplete buffer checks where removed to make
 354                    logic simpler. Impacts of those changes should be evaluated
 355                  */
 356                 if (p[0] == 0x22 && p[1] == 0x5a) {
 357                         /* FIXME - are the fields the right way around? */
 358                         em28xx_isocdbg("Video frame, length=%i, %s\n", len,
 359                                         (p[2] & 1)? "top" : "bottom");
 360                         em28xx_isocdbg("Current buffer is: outp = 0x%p,"
 361                                        " len = %i\n", outp, (int)buf->vb.size);
 362
 363                         if (p[2] & 1) {
 364                                 if (buf->receiving) {
 365                                         buffer_filled(dev, dma_q, buf);
 366                                         rc = get_next_buf(dma_q, &buf);
 367                                         if (rc <= 0)
 368                                                 return rc;
 369
 370                                         outp = videobuf_to_vmalloc(&buf->vb);
 371                                 }
 372
 373                                 buf->top_field = 1;
 374                         } else
 375                                 buf->top_field = 0;
 376                         buf->receiving = 1;
 377                         dma_q->pos = 0;
 378                 } else if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 379                         em28xx_isocdbg("VBI HEADER!!!\n");
 380                 }
 381
 382                 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 383
 384                 /* FIXME: Should add vbi copy */
 385         }
 386         return rc;
 387 }
 388
 389 /* ------------------------------------------------------------------
 390         URB control
 391    ------------------------------------------------------------------*/
 392
 393 /*
 394  * IRQ callback, called by URB callback
 395  */
 396 static void em28xx_irq_callback(struct urb *urb)
 397 {
 398         struct em28xx_dmaqueue  *dma_q = urb->context;
 399         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 400         int rc, i;
 401         unsigned long flags;
 402
 403         spin_lock_irqsave(&dev->slock, flags);
 404
 405         /* Copy data from URB */
 406         rc = em28xx_isoc_copy(urb);
 407
 408         /* Reset urb buffers */
 409         for (i = 0; i < urb->number_of_packets; i++) {
 410                 urb->iso_frame_desc[i].status = 0;
 411                 urb->iso_frame_desc[i].actual_length = 0;
 412         }
 413         urb->status = 0;
 414
 415         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
 416         if (urb->status) {
 417                 em28xx_err("urb resubmit failed (error=%i)\n",
 418                         urb->status);
 419         }
 420
 421         spin_unlock_irqrestore(&dev->slock, flags);
 422 }
 423
 424 /*
 425  * Stop and Deallocate URBs
 426  */
 427 static void em28xx_uninit_isoc(struct em28xx *dev)
 428 {
 429         struct urb *urb;
 430         int i;
 431
 432         em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
 433
 434         dev->isoc_ctl.nfields = -1;
 435         dev->isoc_ctl.buf = NULL;
 436         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 437                 urb = dev->isoc_ctl.urb[i];
 438                 if (urb) {
 439                         usb_kill_urb(urb);
 440                         usb_unlink_urb(urb);
 441                         if (dev->isoc_ctl.transfer_buffer[i]) {
 442                                 usb_buffer_free(dev->udev,
 443                                                 urb->transfer_buffer_length,
 444                                                 dev->isoc_ctl.transfer_buffer[i],
 445                                                 urb->transfer_dma);
 446                         }
 447                         usb_free_urb(urb);
 448                         dev->isoc_ctl.urb[i] = NULL;
 449                 }
 450                 dev->isoc_ctl.transfer_buffer[i] = NULL;
 451         }
 452
 453         kfree(dev->isoc_ctl.urb);
 454         kfree(dev->isoc_ctl.transfer_buffer);
 455         dev->isoc_ctl.urb = NULL;
 456         dev->isoc_ctl.transfer_buffer = NULL;
 457
 458         dev->isoc_ctl.num_bufs = 0;
 459
 460         del_timer(&dev->vidq.timeout);
 461         em28xx_capture_start(dev, 0);
 462 }
 463
 464
 465 /*
 466  * Allocate URBs and start IRQ
 467  */
 468 static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets,
 469                                int num_bufs)
 470 {
 471         struct em28xx_dmaqueue *dma_q = &dev->vidq;
 472         int i;
 473         int sb_size, pipe;
 474         struct urb *urb;
 475         int j, k;
 476
 477         em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
 478
 479         /* De-allocates all pending stuff */
 480         em28xx_uninit_isoc(dev);
 481
 482         dev->isoc_ctl.num_bufs = num_bufs;
 483
 484         dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs,  GFP_KERNEL);
 485         if (!dev->isoc_ctl.urb) {
 486                 em28xx_errdev("cannot alloc memory for usb buffers\n");
 487                 return -ENOMEM;
 488         }
 489
 490         dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
 491                                               GFP_KERNEL);
 492         if (!dev->isoc_ctl.urb) {
 493                 em28xx_errdev("cannot allocate memory for usbtransfer\n");
 494                 kfree(dev->isoc_ctl.urb);
 495                 return -ENOMEM;
 496         }
 497
 498         dev->isoc_ctl.max_pkt_size = dev->max_pkt_size;
 499
 500         sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
 501
 502         /* allocate urbs and transfer buffers */
 503         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 504                 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
 505                 if (!urb) {
 506                         em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
 507                         em28xx_uninit_isoc(dev);
 508                         return -ENOMEM;
 509                 }
 510                 dev->isoc_ctl.urb[i] = urb;
 511
 512                 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
 513                         sb_size, GFP_KERNEL, &urb->transfer_dma);
 514                 if (!dev->isoc_ctl.transfer_buffer[i]) {
 515                         em28xx_err("unable to allocate %i bytes for transfer"
 516                                         " buffer %i%s\n",
 517                                         sb_size, i,
 518                                         in_interrupt()?" while in int":"");
 519                         em28xx_uninit_isoc(dev);
 520                         return -ENOMEM;
 521                 }
 522                 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
 523
 524                 /* FIXME: this is a hack - should be
 525                         'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
 526                         should also be using 'desc.bInterval'
 527                  */
 528                 pipe = usb_rcvisocpipe(dev->udev, 0x82);
 529                 usb_fill_int_urb(urb, dev->udev, pipe,
 530                                  dev->isoc_ctl.transfer_buffer[i], sb_size,
 531                                  em28xx_irq_callback, dma_q, 1);
 532
 533                 urb->number_of_packets = max_packets;
 534                 urb->transfer_flags = URB_ISO_ASAP;
 535
 536                 k = 0;
 537                 for (j = 0; j < max_packets; j++) {
 538                         urb->iso_frame_desc[j].offset = k;
 539                         urb->iso_frame_desc[j].length =
 540                                                 dev->isoc_ctl.max_pkt_size;
 541                         k += dev->isoc_ctl.max_pkt_size;
 542                 }
 543         }
 544
 545         return 0;
 546 }
 547
 548 static int em28xx_start_thread(struct em28xx_dmaqueue  *dma_q)
 549 {
 550         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 551         int i, rc = 0;
 552
 553         em28xx_videodbg("Called em28xx_start_thread\n");
 554
 555         init_waitqueue_head(&dma_q->wq);
 556
 557         em28xx_capture_start(dev, 1);
 558
 559         /* submit urbs and enables IRQ */
 560         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 561                 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
 562                 if (rc) {
 563                         em28xx_err("submit of urb %i failed (error=%i)\n", i,
 564                                    rc);
 565                         em28xx_uninit_isoc(dev);
 566                         return rc;
 567                 }
 568         }
 569
 570         if (rc < 0)
 571                 return rc;
 572
 573         return 0;
 574 }
 575
 576 static void em28xx_vid_timeout(unsigned long data)
 577 {
 578         struct em28xx      *dev  = (struct em28xx *)data;
 579         struct em28xx_dmaqueue *vidq = &dev->vidq;
 580         struct em28xx_buffer   *buf;
 581         unsigned long flags;
 582
 583         spin_lock_irqsave(&dev->slock, flags);
 584
 585         list_for_each_entry(buf, vidq->active.next, vb.queue) {
 586                 list_del(&buf->vb.queue);
 587                 buf->vb.state = VIDEOBUF_ERROR;
 588                 wake_up(&buf->vb.done);
 589                 em28xx_videodbg("em28xx/0: [%p/%d] timeout\n",
 590                                 buf, buf->vb.i);
 591         }
 592         /* Instead of trying to restart, just sets timeout again */
 593         mod_timer(&vidq->timeout, jiffies + BUFFER_TIMEOUT);
 594
 595         spin_unlock_irqrestore(&dev->slock, flags);
 596 }
 597
 598 /* ------------------------------------------------------------------
 599         Videobuf operations
 600    ------------------------------------------------------------------*/
 601
 602 static int
 603 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 604 {
 605         struct em28xx_fh *fh = vq->priv_data;
 606
 607         *size = 16 * fh->dev->width * fh->dev->height >> 3;
 608         if (0 == *count)
 609                 *count = EM28XX_DEF_BUF;
 610
 611         if (*count < EM28XX_MIN_BUF)
 612                 *count = EM28XX_MIN_BUF;
 613
 614         return 0;
 615 }
 616
 617 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 618 {
 619         if (in_interrupt())
 620                 BUG();
 621
 622         videobuf_waiton(&buf->vb, 0, 0);
 623         videobuf_vmalloc_free(&buf->vb);
 624         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 625 }
 626
 627 static int
 628 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 629                                                 enum v4l2_field field)
 630 {
 631         struct em28xx_fh     *fh  = vq->priv_data;
 632         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 633         struct em28xx        *dev = fh->dev;
 634         struct em28xx_dmaqueue *vidq = &dev->vidq;
 635         int                  rc = 0, urb_init = 0;
 636
 637         /* BUG_ON(NULL == fh->fmt); */
 638
 639         /* FIXME: It assumes depth = 16 */
 640         /* The only currently supported format is 16 bits/pixel */
 641         buf->vb.size = 16 * dev->width * dev->height >> 3;
 642
 643         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 644                 return -EINVAL;
 645
 646         if (buf->fmt       != fh->fmt    ||
 647             buf->vb.width  != dev->width  ||
 648             buf->vb.height != dev->height ||
 649             buf->vb.field  != field) {
 650                 buf->fmt       = fh->fmt;
 651                 buf->vb.width  = dev->width;
 652                 buf->vb.height = dev->height;
 653                 buf->vb.field  = field;
 654                 buf->vb.state = VIDEOBUF_NEEDS_INIT;
 655         }
 656
 657         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 658                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 659                 if (rc < 0)
 660                         goto fail;
 661         }
 662
 663         if (!dev->isoc_ctl.num_bufs)
 664                 urb_init = 1;
 665
 666         if (urb_init) {
 667                 rc = em28xx_prepare_isoc(dev, EM28XX_NUM_PACKETS,
 668                                          EM28XX_NUM_BUFS);
 669                 if (rc < 0)
 670                         goto fail;
 671
 672                 rc = em28xx_start_thread(vidq);
 673                 if (rc < 0)
 674                         goto fail;
 675         }
 676
 677         buf->vb.state = VIDEOBUF_PREPARED;
 678         return 0;
 679
 680 fail:
 681         free_buffer(vq, buf);
 682         return rc;
 683 }
 684
 685 static void
 686 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 687 {
 688         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
 689         struct em28xx_fh        *fh      = vq->priv_data;
 690         struct em28xx           *dev     = fh->dev;
 691         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 692
 693         buf->vb.state = VIDEOBUF_QUEUED;
 694         list_add_tail(&buf->vb.queue, &vidq->active);
 695
 696 }
 697
 698 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 699 {
 700         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
 701         struct em28xx_fh       *fh   = vq->priv_data;
 702         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 703
 704         em28xx_isocdbg("em28xx: called buffer_release\n");
 705
 706         free_buffer(vq, buf);
 707 }
 708
 709 static struct videobuf_queue_ops em28xx_video_qops = {
 710         .buf_setup      = buffer_setup,
 711         .buf_prepare    = buffer_prepare,
 712         .buf_queue      = buffer_queue,
 713         .buf_release    = buffer_release,
 714 };
 715
 716 /*********************  v4l2 interface  ******************************************/
 717
 718 /*
 719  * em28xx_config()
 720  * inits registers with sane defaults
 721  */
 722 static int em28xx_config(struct em28xx *dev)
 723 {
 724
 725         /* Sets I2C speed to 100 KHz */
 726         if (!dev->is_em2800)
 727                 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 728
 729         /* enable vbi capturing */
 730
 731 /*      em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
 732 /*      em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
 733         em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
 734
 735         dev->mute = 1;          /* maybe not the right place... */
 736         dev->volume = 0x1f;
 737
 738         em28xx_outfmt_set_yuv422(dev);
 739         em28xx_colorlevels_set_default(dev);
 740         em28xx_compression_disable(dev);
 741
 742         return 0;
 743 }
 744
 745 /*
 746  * em28xx_config_i2c()
 747  * configure i2c attached devices
 748  */
 749 static void em28xx_config_i2c(struct em28xx *dev)
 750 {
 751         struct v4l2_routing route;
 752
 753         route.input = INPUT(dev->ctl_input)->vmux;
 754         route.output = 0;
 755         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 756         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 757         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 758 }
 759
 760 static void video_mux(struct em28xx *dev, int index)
 761 {
 762         struct v4l2_routing route;
 763
 764         route.input = INPUT(index)->vmux;
 765         route.output = 0;
 766         dev->ctl_input = index;
 767         dev->ctl_ainput = INPUT(index)->amux;
 768
 769         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 770
 771         if (dev->has_msp34xx) {
 772                 if (dev->i2s_speed)
 773                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 774                 route.input = dev->ctl_ainput;
 775                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 776                 /* Note: this is msp3400 specific */
 777                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
 778         }
 779
 780         em28xx_audio_analog_set(dev);
 781 }
 782
 783 /* Usage lock check functions */
 784 static int res_get(struct em28xx_fh *fh)
 785 {
 786         struct em28xx    *dev = fh->dev;
 787         int              rc   = 0;
 788
 789         /* This instance already has stream_on */
 790         if (fh->stream_on)
 791                 return rc;
 792
 793         if (dev->stream_on)
 794                 return -EINVAL;
 795
 796         mutex_lock(&dev->lock);
 797         dev->stream_on = 1;
 798         fh->stream_on  = 1;
 799         mutex_unlock(&dev->lock);
 800         return rc;
 801 }
 802
 803 static int res_check(struct em28xx_fh *fh)
 804 {
 805         return (fh->stream_on);
 806 }
 807
 808 static void res_free(struct em28xx_fh *fh)
 809 {
 810         struct em28xx    *dev = fh->dev;
 811
 812         mutex_lock(&dev->lock);
 813         fh->stream_on = 0;
 814         dev->stream_on = 0;
 815         mutex_unlock(&dev->lock);
 816 }
 817
 818 /*
 819  * em28xx_get_ctrl()
 820  * return the current saturation, brightness or contrast, mute state
 821  */
 822 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 823 {
 824         switch (ctrl->id) {
 825         case V4L2_CID_AUDIO_MUTE:
 826                 ctrl->value = dev->mute;
 827                 return 0;
 828         case V4L2_CID_AUDIO_VOLUME:
 829                 ctrl->value = dev->volume;
 830                 return 0;
 831         default:
 832                 return -EINVAL;
 833         }
 834 }
 835
 836 /*
 837  * em28xx_set_ctrl()
 838  * mute or set new saturation, brightness or contrast
 839  */
 840 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 841 {
 842         switch (ctrl->id) {
 843         case V4L2_CID_AUDIO_MUTE:
 844                 if (ctrl->value != dev->mute) {
 845                         dev->mute = ctrl->value;
 846                         return em28xx_audio_analog_set(dev);
 847                 }
 848                 return 0;
 849         case V4L2_CID_AUDIO_VOLUME:
 850                 dev->volume = ctrl->value;
 851                 return em28xx_audio_analog_set(dev);
 852         default:
 853                 return -EINVAL;
 854         }
 855 }
 856
 857 static int check_dev(struct em28xx *dev)
 858 {
 859         if (dev->state & DEV_DISCONNECTED) {
 860                 em28xx_errdev("v4l2 ioctl: device not present\n");
 861                 return -ENODEV;
 862         }
 863
 864         if (dev->state & DEV_MISCONFIGURED) {
 865                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 866                               "close and open it again\n");
 867                 return -EIO;
 868         }
 869         return 0;
 870 }
 871
 872 static void get_scale(struct em28xx *dev,
 873                         unsigned int width, unsigned int height,
 874                         unsigned int *hscale, unsigned int *vscale)
 875 {
 876         unsigned int          maxw   = norm_maxw(dev);
 877         unsigned int          maxh   = norm_maxh(dev);
 878
 879         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 880         if (*hscale >= 0x4000)
 881                 *hscale = 0x3fff;
 882
 883         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 884         if (*vscale >= 0x4000)
 885                 *vscale = 0x3fff;
 886 }
 887
 888 /* ------------------------------------------------------------------
 889         IOCTL vidioc handling
 890    ------------------------------------------------------------------*/
 891
 892 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 893                                         struct v4l2_format *f)
 894 {
 895         struct em28xx_fh      *fh  = priv;
 896         struct em28xx         *dev = fh->dev;
 897
 898         mutex_lock(&dev->lock);
 899
 900         f->fmt.pix.width = dev->width;
 901         f->fmt.pix.height = dev->height;
 902         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 903         f->fmt.pix.bytesperline = dev->bytesperline;
 904         f->fmt.pix.sizeimage = dev->frame_size;
 905         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 906
 907         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 908         f->fmt.pix.field = dev->interlaced ?
 909                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 910
 911         mutex_unlock(&dev->lock);
 912         return 0;
 913 }
 914
 915 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 916                         struct v4l2_format *f)
 917 {
 918         struct em28xx_fh      *fh    = priv;
 919         struct em28xx         *dev   = fh->dev;
 920         int                   width  = f->fmt.pix.width;
 921         int                   height = f->fmt.pix.height;
 922         unsigned int          maxw   = norm_maxw(dev);
 923         unsigned int          maxh   = norm_maxh(dev);
 924         unsigned int          hscale, vscale;
 925
 926         /* width must even because of the YUYV format
 927            height must be even because of interlacing */
 928         height &= 0xfffe;
 929         width &= 0xfffe;
 930
 931         if (height < 32)
 932                 height = 32;
 933         if (height > maxh)
 934                 height = maxh;
 935         if (width < 48)
 936                 width = 48;
 937         if (width > maxw)
 938                 width = maxw;
 939
 940         mutex_lock(&dev->lock);
 941
 942         if (dev->is_em2800) {
 943                 /* the em2800 can only scale down to 50% */
 944                 if (height % (maxh / 2))
 945                         height = maxh;
 946                 if (width % (maxw / 2))
 947                         width = maxw;
 948                 /* according to empiatech support */
 949                 /* the MaxPacketSize is to small to support */
 950                 /* framesizes larger than 640x480 @ 30 fps */
 951                 /* or 640x576 @ 25 fps. As this would cut */
 952                 /* of a part of the image we prefer */
 953                 /* 360x576 or 360x480 for now */
 954                 if (width == maxw && height == maxh)
 955                         width /= 2;
 956         }
 957
 958         get_scale(dev, width, height, &hscale, &vscale);
 959
 960         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 961         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 962
 963         f->fmt.pix.width = width;
 964         f->fmt.pix.height = height;
 965         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 966         f->fmt.pix.bytesperline = width * 2;
 967         f->fmt.pix.sizeimage = width * 2 * height;
 968         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 969         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 970
 971         mutex_unlock(&dev->lock);
 972         return 0;
 973 }
 974
 975 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 976                         struct v4l2_format *f)
 977 {
 978         struct em28xx_fh      *fh  = priv;
 979         struct em28xx         *dev = fh->dev;
 980         int                   rc;
 981
 982         rc = check_dev(dev);
 983         if (rc < 0)
 984                 return rc;
 985
 986         vidioc_try_fmt_cap(file, priv, f);
 987
 988         mutex_lock(&dev->lock);
 989
 990         /* set new image size */
 991         dev->width = f->fmt.pix.width;
 992         dev->height = f->fmt.pix.height;
 993         dev->frame_size = dev->width * dev->height * 2;
 994         dev->field_size = dev->frame_size >> 1;
 995         dev->bytesperline = dev->width * 2;
 996         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 997
 998         em28xx_set_alternate(dev);
 999         em28xx_resolution_set(dev);
1000
1001         mutex_unlock(&dev->lock);
1002         return 0;
1003 }
1004
1005 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1006 {
1007         struct em28xx_fh   *fh  = priv;
1008         struct em28xx      *dev = fh->dev;
1009         struct v4l2_format f;
1010         int                rc;
1011
1012         rc = check_dev(dev);
1013         if (rc < 0)
1014                 return rc;
1015
1016         mutex_lock(&dev->lock);
1017         dev->norm = *norm;
1018         mutex_unlock(&dev->lock);
1019
1020         /* Adjusts width/height, if needed */
1021         f.fmt.pix.width = dev->width;
1022         f.fmt.pix.height = dev->height;
1023         vidioc_try_fmt_cap(file, priv, &f);
1024
1025         mutex_lock(&dev->lock);
1026
1027         /* set new image size */
1028         dev->width = f.fmt.pix.width;
1029         dev->height = f.fmt.pix.height;
1030         dev->frame_size = dev->width * dev->height * 2;
1031         dev->field_size = dev->frame_size >> 1;
1032         dev->bytesperline = dev->width * 2;
1033         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1034
1035         em28xx_resolution_set(dev);
1036         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
1037
1038         mutex_unlock(&dev->lock);
1039         return 0;
1040 }
1041
1042 static const char *iname[] = {
1043         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1044         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1045         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1046         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1047         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1048         [EM28XX_VMUX_TELEVISION] = "Television",
1049         [EM28XX_VMUX_CABLE]      = "Cable TV",
1050         [EM28XX_VMUX_DVB]        = "DVB",
1051         [EM28XX_VMUX_DEBUG]      = "for debug only",
1052 };
1053
1054 static int vidioc_enum_input(struct file *file, void *priv,
1055                                 struct v4l2_input *i)
1056 {
1057         struct em28xx_fh   *fh  = priv;
1058         struct em28xx      *dev = fh->dev;
1059         unsigned int       n;
1060
1061         n = i->index;
1062         if (n >= MAX_EM28XX_INPUT)
1063                 return -EINVAL;
1064         if (0 == INPUT(n)->type)
1065                 return -EINVAL;
1066
1067         i->index = n;
1068         i->type = V4L2_INPUT_TYPE_CAMERA;
1069
1070         strcpy(i->name, iname[INPUT(n)->type]);
1071
1072         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1073                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1074                 i->type = V4L2_INPUT_TYPE_TUNER;
1075
1076         i->std = dev->vdev->tvnorms;
1077
1078         return 0;
1079 }
1080
1081 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1082 {
1083         struct em28xx_fh   *fh  = priv;
1084         struct em28xx      *dev = fh->dev;
1085
1086         *i = dev->ctl_input;
1087
1088         return 0;
1089 }
1090
1091 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1092 {
1093         struct em28xx_fh   *fh  = priv;
1094         struct em28xx      *dev = fh->dev;
1095         int                rc;
1096
1097         rc = check_dev(dev);
1098         if (rc < 0)
1099                 return rc;
1100
1101         if (i >= MAX_EM28XX_INPUT)
1102                 return -EINVAL;
1103         if (0 == INPUT(i)->type)
1104                 return -EINVAL;
1105
1106         mutex_lock(&dev->lock);
1107
1108         video_mux(dev, i);
1109
1110         mutex_unlock(&dev->lock);
1111         return 0;
1112 }
1113
1114 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1115 {
1116         struct em28xx_fh   *fh    = priv;
1117         struct em28xx      *dev   = fh->dev;
1118         unsigned int        index = a->index;
1119
1120         if (a->index > 1)
1121                 return -EINVAL;
1122
1123         index = dev->ctl_ainput;
1124
1125         if (index == 0) {
1126                 strcpy(a->name, "Television");
1127         } else {
1128                 strcpy(a->name, "Line In");
1129         }
1130         a->capability = V4L2_AUDCAP_STEREO;
1131         a->index = index;
1132
1133         return 0;
1134 }
1135
1136 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1137 {
1138         struct em28xx_fh   *fh  = priv;
1139         struct em28xx      *dev = fh->dev;
1140
1141         if (a->index != dev->ctl_ainput)
1142                 return -EINVAL;
1143
1144         return 0;
1145 }
1146
1147 static int vidioc_queryctrl(struct file *file, void *priv,
1148                                 struct v4l2_queryctrl *qc)
1149 {
1150         struct em28xx_fh      *fh  = priv;
1151         struct em28xx         *dev = fh->dev;
1152         int                   id  = qc->id;
1153         int                   i;
1154         int                   rc;
1155
1156         rc = check_dev(dev);
1157         if (rc < 0)
1158                 return rc;
1159
1160         memset(qc, 0, sizeof(*qc));
1161
1162         qc->id = id;
1163
1164         if (!dev->has_msp34xx) {
1165                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1166                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1167                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1168                                 return 0;
1169                         }
1170                 }
1171         }
1172         mutex_lock(&dev->lock);
1173         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1174         mutex_unlock(&dev->lock);
1175
1176         if (qc->type)
1177                 return 0;
1178         else
1179                 return -EINVAL;
1180 }
1181
1182 static int vidioc_g_ctrl(struct file *file, void *priv,
1183                                 struct v4l2_control *ctrl)
1184 {
1185         struct em28xx_fh      *fh  = priv;
1186         struct em28xx         *dev = fh->dev;
1187         int                   rc;
1188
1189         rc = check_dev(dev);
1190         if (rc < 0)
1191                 return rc;
1192         mutex_lock(&dev->lock);
1193
1194         if (!dev->has_msp34xx)
1195                 rc = em28xx_get_ctrl(dev, ctrl);
1196         else
1197                 rc = -EINVAL;
1198
1199         if (rc == -EINVAL) {
1200                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1201                 rc = 0;
1202         }
1203
1204         mutex_unlock(&dev->lock);
1205         return rc;
1206 }
1207
1208 static int vidioc_s_ctrl(struct file *file, void *priv,
1209                                 struct v4l2_control *ctrl)
1210 {
1211         struct em28xx_fh      *fh  = priv;
1212         struct em28xx         *dev = fh->dev;
1213         u8                    i;
1214         int                   rc;
1215
1216         rc = check_dev(dev);
1217         if (rc < 0)
1218                 return rc;
1219
1220         mutex_lock(&dev->lock);
1221
1222         if (dev->has_msp34xx)
1223                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1224         else {
1225                 rc = 1;
1226                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1227                         if (ctrl->id == em28xx_qctrl[i].id) {
1228                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1229                                     ctrl->value > em28xx_qctrl[i].maximum) {
1230                                         rc = -ERANGE;
1231                                         break;
1232                                 }
1233
1234                                 rc = em28xx_set_ctrl(dev, ctrl);
1235                                 break;
1236                         }
1237                 }
1238         }
1239
1240         /* Control not found - try to send it to the attached devices */
1241         if (rc == 1) {
1242                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1243                 rc = 0;
1244         }
1245
1246         mutex_unlock(&dev->lock);
1247         return rc;
1248 }
1249
1250 static int vidioc_g_tuner(struct file *file, void *priv,
1251                                 struct v4l2_tuner *t)
1252 {
1253         struct em28xx_fh      *fh  = priv;
1254         struct em28xx         *dev = fh->dev;
1255         int                   rc;
1256
1257         rc = check_dev(dev);
1258         if (rc < 0)
1259                 return rc;
1260
1261         if (0 != t->index)
1262                 return -EINVAL;
1263
1264         strcpy(t->name, "Tuner");
1265
1266         mutex_lock(&dev->lock);
1267
1268         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1269
1270         mutex_unlock(&dev->lock);
1271         return 0;
1272 }
1273
1274 static int vidioc_s_tuner(struct file *file, void *priv,
1275                                 struct v4l2_tuner *t)
1276 {
1277         struct em28xx_fh      *fh  = priv;
1278         struct em28xx         *dev = fh->dev;
1279         int                   rc;
1280
1281         rc = check_dev(dev);
1282         if (rc < 0)
1283                 return rc;
1284
1285         if (0 != t->index)
1286                 return -EINVAL;
1287
1288         mutex_lock(&dev->lock);
1289
1290         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1291
1292         mutex_unlock(&dev->lock);
1293         return 0;
1294 }
1295
1296 static int vidioc_g_frequency(struct file *file, void *priv,
1297                                 struct v4l2_frequency *f)
1298 {
1299         struct em28xx_fh      *fh  = priv;
1300         struct em28xx         *dev = fh->dev;
1301
1302         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1303         f->frequency = dev->ctl_freq;
1304
1305         return 0;
1306 }
1307
1308 static int vidioc_s_frequency(struct file *file, void *priv,
1309                                 struct v4l2_frequency *f)
1310 {
1311         struct em28xx_fh      *fh  = priv;
1312         struct em28xx         *dev = fh->dev;
1313         int                   rc;
1314
1315         rc = check_dev(dev);
1316         if (rc < 0)
1317                 return rc;
1318
1319         if (0 != f->tuner)
1320                 return -EINVAL;
1321
1322         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1323                 return -EINVAL;
1324         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1325                 return -EINVAL;
1326
1327         mutex_lock(&dev->lock);
1328
1329         dev->ctl_freq = f->frequency;
1330         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1331
1332         mutex_unlock(&dev->lock);
1333         return 0;
1334 }
1335
1336 #ifdef CONFIG_VIDEO_ADV_DEBUG
1337 static int em28xx_reg_len(int reg)
1338 {
1339         switch (reg) {
1340         case AC97LSB_REG:
1341         case HSCALELOW_REG:
1342         case VSCALELOW_REG:
1343                 return 2;
1344         default:
1345                 return 1;
1346         }
1347 }
1348
1349 static int vidioc_g_register(struct file *file, void *priv,
1350                              struct v4l2_register *reg)
1351 {
1352         struct em28xx_fh      *fh  = priv;
1353         struct em28xx         *dev = fh->dev;
1354         int ret;
1355
1356         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1357                 return -EINVAL;
1358
1359         if (em28xx_reg_len(reg->reg) == 1) {
1360                 ret = em28xx_read_reg(dev, reg->reg);
1361                 if (ret < 0)
1362                         return ret;
1363
1364                 reg->val = ret;
1365         } else {
1366                 u64 val = 0;
1367                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1368                                                    reg->reg, (char *)&val, 2);
1369                 if (ret < 0)
1370                         return ret;
1371
1372                 reg->val = cpu_to_le64((__u64)val);
1373         }
1374
1375         return 0;
1376 }
1377
1378 static int vidioc_s_register(struct file *file, void *priv,
1379                              struct v4l2_register *reg)
1380 {
1381         struct em28xx_fh      *fh  = priv;
1382         struct em28xx         *dev = fh->dev;
1383         u64 buf;
1384
1385         buf = le64_to_cpu((__u64)reg->val);
1386
1387         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1388                                  em28xx_reg_len(reg->reg));
1389 }
1390 #endif
1391
1392
1393 static int vidioc_cropcap(struct file *file, void *priv,
1394                                         struct v4l2_cropcap *cc)
1395 {
1396         struct em28xx_fh      *fh  = priv;
1397         struct em28xx         *dev = fh->dev;
1398
1399         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1400                 return -EINVAL;
1401
1402         cc->bounds.left = 0;
1403         cc->bounds.top = 0;
1404         cc->bounds.width = dev->width;
1405         cc->bounds.height = dev->height;
1406         cc->defrect = cc->bounds;
1407         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1408         cc->pixelaspect.denominator = 59;
1409
1410         return 0;
1411 }
1412
1413 static int vidioc_streamon(struct file *file, void *priv,
1414                                         enum v4l2_buf_type type)
1415 {
1416         struct em28xx_fh      *fh  = priv;
1417         struct em28xx         *dev = fh->dev;
1418         int                   rc;
1419
1420         rc = check_dev(dev);
1421         if (rc < 0)
1422                 return rc;
1423
1424
1425         if (unlikely(res_get(fh) < 0))
1426                 return -EBUSY;
1427
1428         return (videobuf_streamon(&fh->vb_vidq));
1429 }
1430
1431 static int vidioc_streamoff(struct file *file, void *priv,
1432                                         enum v4l2_buf_type type)
1433 {
1434         struct em28xx_fh      *fh  = priv;
1435         struct em28xx         *dev = fh->dev;
1436         int                   rc;
1437
1438         rc = check_dev(dev);
1439         if (rc < 0)
1440                 return rc;
1441
1442         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1443                 return -EINVAL;
1444         if (type != fh->type)
1445                 return -EINVAL;
1446
1447         videobuf_streamoff(&fh->vb_vidq);
1448         res_free(fh);
1449
1450         return 0;
1451 }
1452
1453 static int vidioc_querycap(struct file *file, void  *priv,
1454                                         struct v4l2_capability *cap)
1455 {
1456         struct em28xx_fh      *fh  = priv;
1457         struct em28xx         *dev = fh->dev;
1458
1459         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1460         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1461         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1462
1463         cap->version = EM28XX_VERSION_CODE;
1464
1465         cap->capabilities =
1466                         V4L2_CAP_SLICED_VBI_CAPTURE |
1467                         V4L2_CAP_VIDEO_CAPTURE |
1468                         V4L2_CAP_AUDIO |
1469                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1470
1471         if (dev->tuner_type != TUNER_ABSENT)
1472                 cap->capabilities |= V4L2_CAP_TUNER;
1473
1474         return 0;
1475 }
1476
1477 static int vidioc_enum_fmt_cap(struct file *file, void  *priv,
1478                                         struct v4l2_fmtdesc *fmtd)
1479 {
1480         if (fmtd->index != 0)
1481                 return -EINVAL;
1482
1483         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1484         strcpy(fmtd->description, "Packed YUY2");
1485         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1486         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1487
1488         return 0;
1489 }
1490
1491 /* Sliced VBI ioctls */
1492 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1493                                         struct v4l2_format *f)
1494 {
1495         struct em28xx_fh      *fh  = priv;
1496         struct em28xx         *dev = fh->dev;
1497         int                   rc;
1498
1499         rc = check_dev(dev);
1500         if (rc < 0)
1501                 return rc;
1502
1503         mutex_lock(&dev->lock);
1504
1505         f->fmt.sliced.service_set = 0;
1506
1507         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1508
1509         if (f->fmt.sliced.service_set == 0)
1510                 rc = -EINVAL;
1511
1512         mutex_unlock(&dev->lock);
1513         return rc;
1514 }
1515
1516 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1517                         struct v4l2_format *f)
1518 {
1519         struct em28xx_fh      *fh  = priv;
1520         struct em28xx         *dev = fh->dev;
1521         int                   rc;
1522
1523         rc = check_dev(dev);
1524         if (rc < 0)
1525                 return rc;
1526
1527         mutex_lock(&dev->lock);
1528         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1529         mutex_unlock(&dev->lock);
1530
1531         if (f->fmt.sliced.service_set == 0)
1532                 return -EINVAL;
1533
1534         return 0;
1535 }
1536
1537
1538 static int vidioc_reqbufs(struct file *file, void *priv,
1539                           struct v4l2_requestbuffers *rb)
1540 {
1541         struct em28xx_fh      *fh  = priv;
1542         struct em28xx         *dev = fh->dev;
1543         int                   rc;
1544
1545         rc = check_dev(dev);
1546         if (rc < 0)
1547                 return rc;
1548
1549         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1550 }
1551
1552 static int vidioc_querybuf(struct file *file, void *priv,
1553                            struct v4l2_buffer *b)
1554 {
1555         struct em28xx_fh      *fh  = priv;
1556         struct em28xx         *dev = fh->dev;
1557         int                   rc;
1558
1559         rc = check_dev(dev);
1560         if (rc < 0)
1561                 return rc;
1562
1563         return (videobuf_querybuf(&fh->vb_vidq, b));
1564 }
1565
1566 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1567 {
1568         struct em28xx_fh      *fh  = priv;
1569         struct em28xx         *dev = fh->dev;
1570         int                   rc;
1571
1572         rc = check_dev(dev);
1573         if (rc < 0)
1574                 return rc;
1575
1576         return (videobuf_qbuf(&fh->vb_vidq, b));
1577 }
1578
1579 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1580 {
1581         struct em28xx_fh      *fh  = priv;
1582         struct em28xx         *dev = fh->dev;
1583         int                   rc;
1584
1585         rc = check_dev(dev);
1586         if (rc < 0)
1587                 return rc;
1588
1589         return (videobuf_dqbuf(&fh->vb_vidq, b,
1590                                 file->f_flags & O_NONBLOCK));
1591 }
1592
1593 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1594 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1595 {
1596         struct em28xx_fh  *fh = priv;
1597
1598         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1599 }
1600 #endif
1601
1602
1603 /* ----------------------------------------------------------- */
1604 /* RADIO ESPECIFIC IOCTLS                                      */
1605 /* ----------------------------------------------------------- */
1606
1607 static int radio_querycap(struct file *file, void  *priv,
1608                           struct v4l2_capability *cap)
1609 {
1610         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1611
1612         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1613         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1614         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1615
1616         cap->version = EM28XX_VERSION_CODE;
1617         cap->capabilities = V4L2_CAP_TUNER;
1618         return 0;
1619 }
1620
1621 static int radio_g_tuner(struct file *file, void *priv,
1622                          struct v4l2_tuner *t)
1623 {
1624         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1625
1626         if (unlikely(t->index > 0))
1627                 return -EINVAL;
1628
1629         strcpy(t->name, "Radio");
1630         t->type = V4L2_TUNER_RADIO;
1631
1632         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1633         return 0;
1634 }
1635
1636 static int radio_enum_input(struct file *file, void *priv,
1637                             struct v4l2_input *i)
1638 {
1639         if (i->index != 0)
1640                 return -EINVAL;
1641         strcpy(i->name, "Radio");
1642         i->type = V4L2_INPUT_TYPE_TUNER;
1643
1644         return 0;
1645 }
1646
1647 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1648 {
1649         if (unlikely(a->index))
1650                 return -EINVAL;
1651
1652         strcpy(a->name, "Radio");
1653         return 0;
1654 }
1655
1656 static int radio_s_tuner(struct file *file, void *priv,
1657                          struct v4l2_tuner *t)
1658 {
1659         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1660
1661         if (0 != t->index)
1662                 return -EINVAL;
1663
1664         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1665
1666         return 0;
1667 }
1668
1669 static int radio_s_audio(struct file *file, void *fh,
1670                          struct v4l2_audio *a)
1671 {
1672         return 0;
1673 }
1674
1675 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1676 {
1677         return 0;
1678 }
1679
1680 static int radio_queryctrl(struct file *file, void *priv,
1681                            struct v4l2_queryctrl *qc)
1682 {
1683         int i;
1684
1685         if (qc->id <  V4L2_CID_BASE ||
1686                 qc->id >= V4L2_CID_LASTP1)
1687                 return -EINVAL;
1688
1689         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1690                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1691                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1692                         return 0;
1693                 }
1694         }
1695
1696         return -EINVAL;
1697 }
1698
1699 /*
1700  * em28xx_v4l2_open()
1701  * inits the device and starts isoc transfer
1702  */
1703 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1704 {
1705         int minor = iminor(inode);
1706         int errCode = 0, radio = 0;
1707         struct em28xx *h,*dev = NULL;
1708         struct em28xx_fh *fh;
1709         enum v4l2_buf_type fh_type = 0;
1710
1711         list_for_each_entry(h, &em28xx_devlist, devlist) {
1712                 if (h->vdev->minor == minor) {
1713                         dev  = h;
1714                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1715                 }
1716                 if (h->vbi_dev->minor == minor) {
1717                         dev  = h;
1718                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1719                 }
1720                 if (h->radio_dev &&
1721                     h->radio_dev->minor == minor) {
1722                         radio = 1;
1723                         dev   = h;
1724                 }
1725         }
1726         if (NULL == dev)
1727                 return -ENODEV;
1728
1729         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1730                                 minor, v4l2_type_names[fh_type], dev->users);
1731
1732         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1733
1734         if (!fh) {
1735                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1736                 return -ENOMEM;
1737         }
1738         mutex_lock(&dev->lock);
1739         fh->dev = dev;
1740         fh->radio = radio;
1741         fh->type = fh_type;
1742         filp->private_data = fh;
1743
1744         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1745                 dev->width = norm_maxw(dev);
1746                 dev->height = norm_maxh(dev);
1747                 dev->frame_size = dev->width * dev->height * 2;
1748                 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1749                 dev->bytesperline = dev->width * 2;
1750                 dev->hscale = 0;
1751                 dev->vscale = 0;
1752
1753                 em28xx_set_alternate(dev);
1754                 em28xx_resolution_set(dev);
1755
1756         }
1757         if (fh->radio) {
1758                 em28xx_videodbg("video_open: setting radio device\n");
1759                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1760         }
1761
1762         dev->users++;
1763
1764         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1765                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1766                         sizeof(struct em28xx_buffer), fh);
1767
1768         mutex_unlock(&dev->lock);
1769         return errCode;
1770 }
1771
1772 /*
1773  * em28xx_realease_resources()
1774  * unregisters the v4l2,i2c and usb devices
1775  * called when the device gets disconected or at module unload
1776 */
1777 static void em28xx_release_resources(struct em28xx *dev)
1778 {
1779
1780         /*FIXME: I2C IR should be disconnected */
1781
1782         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1783                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1784                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1785         list_del(&dev->devlist);
1786         if (dev->radio_dev) {
1787                 if (-1 != dev->radio_dev->minor)
1788                         video_unregister_device(dev->radio_dev);
1789                 else
1790                         video_device_release(dev->radio_dev);
1791                 dev->radio_dev = NULL;
1792         }
1793         if (dev->vbi_dev) {
1794                 if (-1 != dev->vbi_dev->minor)
1795                         video_unregister_device(dev->vbi_dev);
1796                 else
1797                         video_device_release(dev->vbi_dev);
1798                 dev->vbi_dev = NULL;
1799         }
1800         if (dev->vdev) {
1801                 if (-1 != dev->vdev->minor)
1802                         video_unregister_device(dev->vdev);
1803                 else
1804                         video_device_release(dev->vdev);
1805                 dev->vdev = NULL;
1806         }
1807         em28xx_i2c_unregister(dev);
1808         usb_put_dev(dev->udev);
1809
1810         /* Mark device as unused */
1811         em28xx_devused&=~(1<<dev->devno);
1812 }
1813
1814 /*
1815  * em28xx_v4l2_close()
1816  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1817  */
1818 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1819 {
1820         struct em28xx_fh *fh  = filp->private_data;
1821         struct em28xx    *dev = fh->dev;
1822         int              errCode;
1823
1824         em28xx_videodbg("users=%d\n", dev->users);
1825
1826
1827         if (res_check(fh))
1828                 res_free(fh);
1829
1830         mutex_lock(&dev->lock);
1831
1832         if (dev->users == 1) {
1833                 videobuf_stop(&fh->vb_vidq);
1834                 videobuf_mmap_free(&fh->vb_vidq);
1835
1836                 /* the device is already disconnect,
1837                    free the remaining resources */
1838                 if (dev->state & DEV_DISCONNECTED) {
1839                         em28xx_release_resources(dev);
1840                         mutex_unlock(&dev->lock);
1841                         kfree(dev);
1842                         return 0;
1843                 }
1844
1845                 /* do this before setting alternate! */
1846                 em28xx_uninit_isoc(dev);
1847
1848                 /* set alternate 0 */
1849                 dev->alt = 0;
1850                 em28xx_videodbg("setting alternate 0\n");
1851                 errCode = usb_set_interface(dev->udev, 0, 0);
1852                 if (errCode < 0) {
1853                         em28xx_errdev("cannot change alternate number to "
1854                                         "0 (error=%i)\n", errCode);
1855                 }
1856         }
1857         kfree(fh);
1858         dev->users--;
1859         wake_up_interruptible_nr(&dev->open, 1);
1860         mutex_unlock(&dev->lock);
1861         return 0;
1862 }
1863
1864 /*
1865  * em28xx_v4l2_read()
1866  * will allocate buffers when called for the first time
1867  */
1868 static ssize_t
1869 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1870                  loff_t *pos)
1871 {
1872         struct em28xx_fh *fh = filp->private_data;
1873         struct em28xx *dev = fh->dev;
1874         int rc;
1875
1876         rc = check_dev(dev);
1877         if (rc < 0)
1878                 return rc;
1879
1880         /* FIXME: read() is not prepared to allow changing the video
1881            resolution while streaming. Seems a bug at em28xx_set_fmt
1882          */
1883
1884         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1885                 if (unlikely(res_get(fh)))
1886                         return -EBUSY;
1887
1888                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1889                                         filp->f_flags & O_NONBLOCK);
1890         }
1891         return 0;
1892 }
1893
1894 /*
1895  * em28xx_v4l2_poll()
1896  * will allocate buffers when called for the first time
1897  */
1898 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1899 {
1900         struct em28xx_fh *fh = filp->private_data;
1901         struct em28xx *dev = fh->dev;
1902         int rc;
1903
1904         rc = check_dev(dev);
1905         if (rc < 0)
1906                 return rc;
1907
1908         if (unlikely(res_get(fh) < 0))
1909                 return POLLERR;
1910
1911         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1912                 return POLLERR;
1913
1914         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1915 }
1916
1917 /*
1918  * em28xx_v4l2_mmap()
1919  */
1920 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1921 {
1922         struct em28xx_fh *fh    = filp->private_data;
1923         struct em28xx    *dev   = fh->dev;
1924         int              rc;
1925
1926         if (unlikely(res_get(fh) < 0))
1927                 return -EBUSY;
1928
1929         rc = check_dev(dev);
1930         if (rc < 0)
1931                 return rc;
1932
1933         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1934
1935         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1936                 (unsigned long)vma->vm_start,
1937                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1938                 rc);
1939
1940         return rc;
1941 }
1942
1943 static const struct file_operations em28xx_v4l_fops = {
1944         .owner         = THIS_MODULE,
1945         .open          = em28xx_v4l2_open,
1946         .release       = em28xx_v4l2_close,
1947         .read          = em28xx_v4l2_read,
1948         .poll          = em28xx_v4l2_poll,
1949         .mmap          = em28xx_v4l2_mmap,
1950         .ioctl         = video_ioctl2,
1951         .llseek        = no_llseek,
1952         .compat_ioctl  = v4l_compat_ioctl32,
1953 };
1954
1955 static const struct file_operations radio_fops = {
1956         .owner         = THIS_MODULE,
1957         .open          = em28xx_v4l2_open,
1958         .release       = em28xx_v4l2_close,
1959         .ioctl         = video_ioctl2,
1960         .compat_ioctl  = v4l_compat_ioctl32,
1961         .llseek        = no_llseek,
1962 };
1963
1964 static const struct video_device em28xx_video_template = {
1965         .fops                       = &em28xx_v4l_fops,
1966         .release                    = video_device_release,
1967
1968         .minor                      = -1,
1969         .vidioc_querycap            = vidioc_querycap,
1970         .vidioc_enum_fmt_cap        = vidioc_enum_fmt_cap,
1971         .vidioc_g_fmt_cap           = vidioc_g_fmt_cap,
1972         .vidioc_try_fmt_cap         = vidioc_try_fmt_cap,
1973         .vidioc_s_fmt_cap           = vidioc_s_fmt_cap,
1974         .vidioc_g_audio             = vidioc_g_audio,
1975         .vidioc_s_audio             = vidioc_s_audio,
1976         .vidioc_cropcap             = vidioc_cropcap,
1977
1978         .vidioc_g_fmt_vbi_capture   = vidioc_g_fmt_vbi_capture,
1979         .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1980         .vidioc_s_fmt_vbi_capture   = vidioc_try_set_vbi_capture,
1981
1982         .vidioc_reqbufs             = vidioc_reqbufs,
1983         .vidioc_querybuf            = vidioc_querybuf,
1984         .vidioc_qbuf                = vidioc_qbuf,
1985         .vidioc_dqbuf               = vidioc_dqbuf,
1986         .vidioc_s_std               = vidioc_s_std,
1987         .vidioc_enum_input          = vidioc_enum_input,
1988         .vidioc_g_input             = vidioc_g_input,
1989         .vidioc_s_input             = vidioc_s_input,
1990         .vidioc_queryctrl           = vidioc_queryctrl,
1991         .vidioc_g_ctrl              = vidioc_g_ctrl,
1992         .vidioc_s_ctrl              = vidioc_s_ctrl,
1993         .vidioc_streamon            = vidioc_streamon,
1994         .vidioc_streamoff           = vidioc_streamoff,
1995         .vidioc_g_tuner             = vidioc_g_tuner,
1996         .vidioc_s_tuner             = vidioc_s_tuner,
1997         .vidioc_g_frequency         = vidioc_g_frequency,
1998         .vidioc_s_frequency         = vidioc_s_frequency,
1999 #ifdef CONFIG_VIDEO_ADV_DEBUG
2000         .vidioc_g_register          = vidioc_g_register,
2001         .vidioc_s_register          = vidioc_s_register,
2002 #endif
2003 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2004         .vidiocgmbuf                = vidiocgmbuf,
2005 #endif
2006
2007         .tvnorms                    = V4L2_STD_ALL,
2008         .current_norm               = V4L2_STD_PAL,
2009 };
2010
2011 static struct video_device em28xx_radio_template = {
2012         .name                 = "em28xx-radio",
2013         .type                 = VID_TYPE_TUNER,
2014         .fops                 = &radio_fops,
2015         .minor                = -1,
2016         .vidioc_querycap      = radio_querycap,
2017         .vidioc_g_tuner       = radio_g_tuner,
2018         .vidioc_enum_input    = radio_enum_input,
2019         .vidioc_g_audio       = radio_g_audio,
2020         .vidioc_s_tuner       = radio_s_tuner,
2021         .vidioc_s_audio       = radio_s_audio,
2022         .vidioc_s_input       = radio_s_input,
2023         .vidioc_queryctrl     = radio_queryctrl,
2024         .vidioc_g_ctrl        = vidioc_g_ctrl,
2025         .vidioc_s_ctrl        = vidioc_s_ctrl,
2026         .vidioc_g_frequency   = vidioc_g_frequency,
2027         .vidioc_s_frequency   = vidioc_s_frequency,
2028 #ifdef CONFIG_VIDEO_ADV_DEBUG
2029         .vidioc_g_register    = vidioc_g_register,
2030         .vidioc_s_register    = vidioc_s_register,
2031 #endif
2032 };
2033
2034 /******************************** usb interface *****************************************/
2035
2036
2037 static LIST_HEAD(em28xx_extension_devlist);
2038 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
2039
2040 int em28xx_register_extension(struct em28xx_ops *ops)
2041 {
2042         struct em28xx *h, *dev = NULL;
2043
2044         list_for_each_entry(h, &em28xx_devlist, devlist)
2045                 dev = h;
2046
2047         mutex_lock(&em28xx_extension_devlist_lock);
2048         list_add_tail(&ops->next, &em28xx_extension_devlist);
2049         if (dev)
2050                 ops->init(dev);
2051
2052         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
2053         mutex_unlock(&em28xx_extension_devlist_lock);
2054
2055         return 0;
2056 }
2057 EXPORT_SYMBOL(em28xx_register_extension);
2058
2059 void em28xx_unregister_extension(struct em28xx_ops *ops)
2060 {
2061         struct em28xx *h, *dev = NULL;
2062
2063         list_for_each_entry(h, &em28xx_devlist, devlist)
2064                 dev = h;
2065
2066         if (dev)
2067                 ops->fini(dev);
2068
2069         mutex_lock(&em28xx_extension_devlist_lock);
2070         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
2071         list_del(&ops->next);
2072         mutex_unlock(&em28xx_extension_devlist_lock);
2073 }
2074 EXPORT_SYMBOL(em28xx_unregister_extension);
2075
2076 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2077                                              const struct video_device *template,
2078                                              const int type,
2079                                              const char *type_name)
2080 {
2081         struct video_device *vfd;
2082
2083         vfd = video_device_alloc();
2084         if (NULL == vfd)
2085                 return NULL;
2086         *vfd = *template;
2087         vfd->minor   = -1;
2088         vfd->dev = &dev->udev->dev;
2089         vfd->release = video_device_release;
2090         vfd->type = type;
2091
2092         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2093                  dev->name, type_name);
2094
2095         return vfd;
2096 }
2097
2098
2099 /*
2100  * em28xx_init_dev()
2101  * allocates and inits the device structs, registers i2c bus and v4l device
2102  */
2103 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2104                            int minor)
2105 {
2106         struct em28xx_ops *ops = NULL;
2107         struct em28xx *dev = *devhandle;
2108         int retval = -ENOMEM;
2109         int errCode;
2110         unsigned int maxh, maxw;
2111
2112         dev->udev = udev;
2113         mutex_init(&dev->lock);
2114         spin_lock_init(&dev->slock);
2115         init_waitqueue_head(&dev->open);
2116         init_waitqueue_head(&dev->wait_frame);
2117         init_waitqueue_head(&dev->wait_stream);
2118
2119         dev->em28xx_write_regs = em28xx_write_regs;
2120         dev->em28xx_read_reg = em28xx_read_reg;
2121         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2122         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2123         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2124         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2125
2126         errCode = em28xx_read_reg(dev, CHIPID_REG);
2127         if (errCode >= 0)
2128                 em28xx_info("em28xx chip ID = %d\n", errCode);
2129
2130         em28xx_pre_card_setup(dev);
2131
2132         errCode = em28xx_config(dev);
2133         if (errCode) {
2134                 em28xx_errdev("error configuring device\n");
2135                 em28xx_devused &= ~(1<<dev->devno);
2136                 kfree(dev);
2137                 return -ENOMEM;
2138         }
2139
2140         /* register i2c bus */
2141         em28xx_i2c_register(dev);
2142
2143         /* Do board specific init and eeprom reading */
2144         em28xx_card_setup(dev);
2145
2146         /* Configure audio */
2147         em28xx_audio_analog_set(dev);
2148
2149         /* configure the device */
2150         em28xx_config_i2c(dev);
2151
2152         /* set default norm */
2153         dev->norm = em28xx_video_template.current_norm;
2154
2155         maxw = norm_maxw(dev);
2156         maxh = norm_maxh(dev);
2157
2158         /* set default image size */
2159         dev->width = maxw;
2160         dev->height = maxh;
2161         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2162         dev->field_size = dev->width * dev->height;
2163         dev->frame_size =
2164             dev->interlaced ? dev->field_size << 1 : dev->field_size;
2165         dev->bytesperline = dev->width * 2;
2166         dev->hscale = 0;
2167         dev->vscale = 0;
2168         dev->ctl_input = 2;
2169
2170         errCode = em28xx_config(dev);
2171
2172         list_add_tail(&dev->devlist, &em28xx_devlist);
2173
2174         /* allocate and fill video video_device struct */
2175         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
2176                                           VID_TYPE_CAPTURE, "video");
2177         if (NULL == dev->vdev) {
2178                 em28xx_errdev("cannot allocate video_device.\n");
2179                 goto fail_unreg;
2180         }
2181         if (dev->tuner_type != TUNER_ABSENT)
2182                 dev->vdev->type |= VID_TYPE_TUNER;
2183
2184         /* register v4l2 video video_device */
2185         retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2186                                        video_nr[dev->devno]);
2187         if (retval) {
2188                 em28xx_errdev("unable to register video device (error=%i).\n",
2189                               retval);
2190                 goto fail_unreg;
2191         }
2192
2193         /* Allocate and fill vbi video_device struct */
2194         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2195                                           VFL_TYPE_VBI, "vbi");
2196         /* register v4l2 vbi video_device */
2197         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2198                                         vbi_nr[dev->devno]) < 0) {
2199                 em28xx_errdev("unable to register vbi device\n");
2200                 retval = -ENODEV;
2201                 goto fail_unreg;
2202         }
2203
2204         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2205                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2206                                         VFL_TYPE_RADIO, "radio");
2207                 if (NULL == dev->radio_dev) {
2208                         em28xx_errdev("cannot allocate video_device.\n");
2209                         goto fail_unreg;
2210                 }
2211                 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2212                                             radio_nr[dev->devno]);
2213                 if (retval < 0) {
2214                         em28xx_errdev("can't register radio device\n");
2215                         goto fail_unreg;
2216                 }
2217                 em28xx_info("Registered radio device as /dev/radio%d\n",
2218                             dev->radio_dev->minor & 0x1f);
2219         }
2220
2221         /* init video dma queues */
2222         INIT_LIST_HEAD(&dev->vidq.active);
2223         INIT_LIST_HEAD(&dev->vidq.queued);
2224
2225         dev->vidq.timeout.function = em28xx_vid_timeout;
2226         dev->vidq.timeout.data     = (unsigned long)dev;
2227         init_timer(&dev->vidq.timeout);
2228
2229
2230         if (dev->has_msp34xx) {
2231                 /* Send a reset to other chips via gpio */
2232                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2233                 msleep(3);
2234                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2235                 msleep(3);
2236         }
2237
2238         video_mux(dev, 0);
2239
2240         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2241                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2242                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2243
2244         mutex_lock(&em28xx_extension_devlist_lock);
2245         if (!list_empty(&em28xx_extension_devlist)) {
2246                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2247                         if (ops->id)
2248                                 ops->init(dev);
2249                 }
2250         }
2251         mutex_unlock(&em28xx_extension_devlist_lock);
2252
2253         return 0;
2254
2255 fail_unreg:
2256         em28xx_release_resources(dev);
2257         mutex_unlock(&dev->lock);
2258         kfree(dev);
2259         return retval;
2260 }
2261
2262 #if defined(CONFIG_MODULES) && defined(MODULE)
2263 static void request_module_async(struct work_struct *work)
2264 {
2265         struct em28xx *dev = container_of(work,
2266                              struct em28xx, request_module_wk);
2267
2268         if (dev->has_audio_class)
2269                 request_module("snd-usb-audio");
2270         else
2271                 request_module("em28xx-alsa");
2272 }
2273
2274 static void request_modules(struct em28xx *dev)
2275 {
2276         INIT_WORK(&dev->request_module_wk, request_module_async);
2277         schedule_work(&dev->request_module_wk);
2278 }
2279 #else
2280 #define request_modules(dev)
2281 #endif /* CONFIG_MODULES */
2282
2283 /*
2284  * em28xx_usb_probe()
2285  * checks for supported devices
2286  */
2287 static int em28xx_usb_probe(struct usb_interface *interface,
2288                             const struct usb_device_id *id)
2289 {
2290         const struct usb_endpoint_descriptor *endpoint;
2291         struct usb_device *udev;
2292         struct usb_interface *uif;
2293         struct em28xx *dev = NULL;
2294         int retval = -ENODEV;
2295         int i, nr, ifnum;
2296
2297         udev = usb_get_dev(interface_to_usbdev(interface));
2298         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2299
2300         /* Check to see next free device and mark as used */
2301         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2302         em28xx_devused|=1<<nr;
2303
2304         /* Don't register audio interfaces */
2305         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2306                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2307                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
2308                                 ifnum,
2309                                 interface->altsetting[0].desc.bInterfaceClass);
2310
2311                 em28xx_devused&=~(1<<nr);
2312                 return -ENODEV;
2313         }
2314
2315         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2316                         udev->descriptor.idVendor,udev->descriptor.idProduct,
2317                         ifnum,
2318                         interface->altsetting[0].desc.bInterfaceClass);
2319
2320         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2321
2322         /* check if the device has the iso in endpoint at the correct place */
2323         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2324             USB_ENDPOINT_XFER_ISOC) {
2325                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2326                 em28xx_devused&=~(1<<nr);
2327                 return -ENODEV;
2328         }
2329         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2330                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2331                 em28xx_devused&=~(1<<nr);
2332                 return -ENODEV;
2333         }
2334
2335         if (nr >= EM28XX_MAXBOARDS) {
2336                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2337                 em28xx_devused&=~(1<<nr);
2338                 return -ENOMEM;
2339         }
2340
2341         /* allocate memory for our device state and initialize it */
2342         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2343         if (dev == NULL) {
2344                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2345                 em28xx_devused&=~(1<<nr);
2346                 return -ENOMEM;
2347         }
2348
2349         snprintf(dev->name, 29, "em28xx #%d", nr);
2350         dev->devno = nr;
2351         dev->model = id->driver_info;
2352         dev->alt   = -1;
2353
2354         /* Checks if audio is provided by some interface */
2355         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2356                 uif = udev->config->interface[i];
2357                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2358                         dev->has_audio_class = 1;
2359                         break;
2360                 }
2361         }
2362
2363         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2364                    dev->has_audio_class ? "Has" : "Doesn't have");
2365
2366         /* compute alternate max packet sizes */
2367         uif = udev->actconfig->interface[0];
2368
2369         dev->num_alt=uif->num_altsetting;
2370         em28xx_info("Alternate settings: %i\n",dev->num_alt);
2371 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2372         dev->alt_max_pkt_size = kmalloc(32*
2373                                                 dev->num_alt,GFP_KERNEL);
2374         if (dev->alt_max_pkt_size == NULL) {
2375                 em28xx_errdev("out of memory!\n");
2376                 em28xx_devused&=~(1<<nr);
2377                 kfree(dev);
2378                 return -ENOMEM;
2379         }
2380
2381         for (i = 0; i < dev->num_alt ; i++) {
2382                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2383                                                         wMaxPacketSize);
2384                 dev->alt_max_pkt_size[i] =
2385                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2386                 em28xx_info("Alternate setting %i, max size= %i\n",i,
2387                                                         dev->alt_max_pkt_size[i]);
2388         }
2389
2390         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2391                 dev->model = card[nr];
2392
2393         /* allocate device struct */
2394         retval = em28xx_init_dev(&dev, udev, nr);
2395         if (retval)
2396                 return retval;
2397
2398         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2399
2400         /* save our data pointer in this interface device */
2401         usb_set_intfdata(interface, dev);
2402
2403         request_modules(dev);
2404
2405         return 0;
2406 }
2407
2408 /*
2409  * em28xx_usb_disconnect()
2410  * called when the device gets diconencted
2411  * video device will be unregistered on v4l2_close in case it is still open
2412  */
2413 static void em28xx_usb_disconnect(struct usb_interface *interface)
2414 {
2415         struct em28xx *dev;
2416         struct em28xx_ops *ops = NULL;
2417
2418         dev = usb_get_intfdata(interface);
2419         usb_set_intfdata(interface, NULL);
2420
2421         if (!dev)
2422                 return;
2423
2424         em28xx_info("disconnecting %s\n", dev->vdev->name);
2425
2426         /* wait until all current v4l2 io is finished then deallocate resources */
2427         mutex_lock(&dev->lock);
2428
2429         wake_up_interruptible_all(&dev->open);
2430
2431         if (dev->users) {
2432                 em28xx_warn
2433                     ("device /dev/video%d is open! Deregistration and memory "
2434                      "deallocation are deferred on close.\n",
2435                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2436
2437                 dev->state |= DEV_MISCONFIGURED;
2438                 em28xx_uninit_isoc(dev);
2439                 dev->state |= DEV_DISCONNECTED;
2440                 wake_up_interruptible(&dev->wait_frame);
2441                 wake_up_interruptible(&dev->wait_stream);
2442         } else {
2443                 dev->state |= DEV_DISCONNECTED;
2444                 em28xx_release_resources(dev);
2445         }
2446         mutex_unlock(&dev->lock);
2447
2448         mutex_lock(&em28xx_extension_devlist_lock);
2449         if (!list_empty(&em28xx_extension_devlist)) {
2450                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2451                         ops->fini(dev);
2452                 }
2453         }
2454         mutex_unlock(&em28xx_extension_devlist_lock);
2455
2456         if (!dev->users) {
2457                 kfree(dev->alt_max_pkt_size);
2458                 kfree(dev);
2459         }
2460 }
2461
2462 static struct usb_driver em28xx_usb_driver = {
2463         .name = "em28xx",
2464         .probe = em28xx_usb_probe,
2465         .disconnect = em28xx_usb_disconnect,
2466         .id_table = em28xx_id_table,
2467 };
2468
2469 static int __init em28xx_module_init(void)
2470 {
2471         int result;
2472
2473         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2474                (EM28XX_VERSION_CODE >> 16) & 0xff,
2475                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2476 #ifdef SNAPSHOT
2477         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2478                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2479 #endif
2480
2481         /* register this driver with the USB subsystem */
2482         result = usb_register(&em28xx_usb_driver);
2483         if (result)
2484                 em28xx_err(DRIVER_NAME
2485                            " usb_register failed. Error number %d.\n", result);
2486
2487         return result;
2488 }
2489
2490 static void __exit em28xx_module_exit(void)
2491 {
2492         /* deregister this driver with the USB subsystem */
2493         usb_deregister(&em28xx_usb_driver);
2494 }
2495
2496 module_init(em28xx_module_init);
2497 module_exit(em28xx_module_exit);