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 MODULE_AUTHOR(DRIVER_AUTHOR);
  67 MODULE_DESCRIPTION(DRIVER_DESC);
  68 MODULE_LICENSE("GPL");
  69
  70 static LIST_HEAD(em28xx_devlist);
  71
  72 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  73 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  74 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  75 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  76
  77 module_param_array(card,  int, NULL, 0444);
  78 module_param_array(video_nr, int, NULL, 0444);
  79 module_param_array(vbi_nr, int, NULL, 0444);
  80 module_param_array(radio_nr, int, NULL, 0444);
  81 MODULE_PARM_DESC(card,     "card type");
  82 MODULE_PARM_DESC(video_nr, "video device numbers");
  83 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  84 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  85
  86 static unsigned int video_debug;
  87 module_param(video_debug,int,0644);
  88 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  89
  90 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  91 static unsigned long em28xx_devused;
  92
  93 /* supported controls */
  94 /* Common to all boards */
  95 static struct v4l2_queryctrl em28xx_qctrl[] = {
  96         {
  97                 .id = V4L2_CID_AUDIO_VOLUME,
  98                 .type = V4L2_CTRL_TYPE_INTEGER,
  99                 .name = "Volume",
 100                 .minimum = 0x0,
 101                 .maximum = 0x1f,
 102                 .step = 0x1,
 103                 .default_value = 0x1f,
 104                 .flags = 0,
 105         },{
 106                 .id = V4L2_CID_AUDIO_MUTE,
 107                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 108                 .name = "Mute",
 109                 .minimum = 0,
 110                 .maximum = 1,
 111                 .step = 1,
 112                 .default_value = 1,
 113                 .flags = 0,
 114         }
 115 };
 116
 117 static struct usb_driver em28xx_usb_driver;
 118
 119 /* ------------------------------------------------------------------
 120         DMA and thread functions
 121    ------------------------------------------------------------------*/
 122
 123 /*
 124  * Announces that a buffer were filled and request the next
 125  */
 126 static inline void buffer_filled(struct em28xx *dev,
 127                                   struct em28xx_dmaqueue *dma_q,
 128                                   struct em28xx_buffer *buf)
 129 {
 130         /* Advice that buffer was filled */
 131         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 132         buf->vb.state = VIDEOBUF_DONE;
 133         buf->vb.field_count++;
 134         do_gettimeofday(&buf->vb.ts);
 135
 136         dev->isoc_ctl.buf = NULL;
 137
 138         list_del(&buf->vb.queue);
 139         wake_up(&buf->vb.done);
 140 }
 141
 142 /*
 143  * Identify the buffer header type and properly handles
 144  */
 145 static void em28xx_copy_video(struct em28xx *dev,
 146                               struct em28xx_dmaqueue  *dma_q,
 147                               struct em28xx_buffer *buf,
 148                               unsigned char *p,
 149                               unsigned char *outp, unsigned long len)
 150 {
 151         void *fieldstart, *startwrite, *startread;
 152         int  linesdone, currlinedone, offset, lencopy, remain;
 153         int bytesperline = dev->width << 1;
 154
 155         if (dma_q->pos + len > buf->vb.size)
 156                 len = buf->vb.size - dma_q->pos;
 157
 158         if (p[0] != 0x88 && p[0] != 0x22) {
 159                 em28xx_isocdbg("frame is not complete\n");
 160                 len += 4;
 161         } else
 162                 p += 4;
 163
 164         startread = p;
 165         remain = len;
 166
 167         /* Interlaces frame */
 168         if (buf->top_field)
 169                 fieldstart = outp;
 170         else
 171                 fieldstart = outp + bytesperline;
 172
 173         linesdone = dma_q->pos / bytesperline;
 174         currlinedone = dma_q->pos % bytesperline;
 175         offset = linesdone * bytesperline * 2 + currlinedone;
 176         startwrite = fieldstart + offset;
 177         lencopy = bytesperline - currlinedone;
 178         lencopy = lencopy > remain ? remain : lencopy;
 179
 180         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 181                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 182                                ((char *)startwrite + lencopy) -
 183                                ((char *)outp + buf->vb.size));
 184                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 185         }
 186         if (lencopy <= 0)
 187                 return;
 188         memcpy(startwrite, startread, lencopy);
 189
 190         remain -= lencopy;
 191
 192         while (remain > 0) {
 193                 startwrite += lencopy + bytesperline;
 194                 startread += lencopy;
 195                 if (bytesperline > remain)
 196                         lencopy = remain;
 197                 else
 198                         lencopy = bytesperline;
 199
 200                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 201                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 202                                        ((char *)startwrite + lencopy) -
 203                                        ((char *)outp + buf->vb.size));
 204                         lencopy = remain = (char *)outp + buf->vb.size -
 205                                            (char *)startwrite;
 206                 }
 207                 if (lencopy <= 0)
 208                         break;
 209
 210                 memcpy(startwrite, startread, lencopy);
 211
 212                 remain -= lencopy;
 213         }
 214
 215         dma_q->pos += len;
 216 }
 217
 218 static inline void print_err_status(struct em28xx *dev,
 219                                      int packet, int status)
 220 {
 221         char *errmsg = "Unknown";
 222
 223         switch (status) {
 224         case -ENOENT:
 225                 errmsg = "unlinked synchronuously";
 226                 break;
 227         case -ECONNRESET:
 228                 errmsg = "unlinked asynchronuously";
 229                 break;
 230         case -ENOSR:
 231                 errmsg = "Buffer error (overrun)";
 232                 break;
 233         case -EPIPE:
 234                 errmsg = "Stalled (device not responding)";
 235                 break;
 236         case -EOVERFLOW:
 237                 errmsg = "Babble (bad cable?)";
 238                 break;
 239         case -EPROTO:
 240                 errmsg = "Bit-stuff error (bad cable?)";
 241                 break;
 242         case -EILSEQ:
 243                 errmsg = "CRC/Timeout (could be anything)";
 244                 break;
 245         case -ETIME:
 246                 errmsg = "Device does not respond";
 247                 break;
 248         }
 249         if (packet < 0) {
 250                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 251         } else {
 252                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 253                                packet, status, errmsg);
 254         }
 255 }
 256
 257 /*
 258  * video-buf generic routine to get the next available buffer
 259  */
 260 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 261                                           struct em28xx_buffer **buf)
 262 {
 263         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 264         char *outp;
 265
 266         if (list_empty(&dma_q->active)) {
 267                 em28xx_isocdbg("No active queue to serve\n");
 268                 dev->isoc_ctl.buf = NULL;
 269                 *buf = NULL;
 270                 return;
 271         }
 272
 273         /* Get the next buffer */
 274         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 275
 276         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 277         outp = videobuf_to_vmalloc(&(*buf)->vb);
 278         memset(outp, 0, (*buf)->vb.size);
 279
 280         dev->isoc_ctl.buf = *buf;
 281
 282         return;
 283 }
 284
 285 /*
 286  * Controls the isoc copy of each urb packet
 287  */
 288 static inline int em28xx_isoc_copy(struct urb *urb)
 289 {
 290         struct em28xx_buffer    *buf;
 291         struct em28xx_dmaqueue  *dma_q = urb->context;
 292         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 293         unsigned char *outp = NULL;
 294         int i, len = 0, rc = 1;
 295         unsigned char *p;
 296
 297         if (!dev)
 298                 return 0;
 299
 300         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 301                 return 0;
 302
 303         if (urb->status < 0) {
 304                 print_err_status(dev, -1, urb->status);
 305                 if (urb->status == -ENOENT)
 306                         return 0;
 307         }
 308
 309         buf = dev->isoc_ctl.buf;
 310         if (buf != NULL)
 311                 outp = videobuf_to_vmalloc(&buf->vb);
 312
 313         for (i = 0; i < urb->number_of_packets; i++) {
 314                 int status = urb->iso_frame_desc[i].status;
 315
 316                 if (status < 0) {
 317                         print_err_status(dev, i, status);
 318                         if (urb->iso_frame_desc[i].status != -EPROTO)
 319                                 continue;
 320                 }
 321
 322                 len = urb->iso_frame_desc[i].actual_length - 4;
 323
 324                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 325                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 326                         continue;
 327                 }
 328                 if (urb->iso_frame_desc[i].actual_length >
 329                                                 dev->max_pkt_size) {
 330                         em28xx_isocdbg("packet bigger than packet size");
 331                         continue;
 332                 }
 333
 334                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 335
 336                 /* FIXME: incomplete buffer checks where removed to make
 337                    logic simpler. Impacts of those changes should be evaluated
 338                  */
 339                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 340                         em28xx_isocdbg("VBI HEADER!!!\n");
 341                         /* FIXME: Should add vbi copy */
 342                         continue;
 343                 }
 344                 if (p[0] == 0x22 && p[1] == 0x5a) {
 345                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 346                                        len, (p[2] & 1)? "odd" : "even");
 347
 348                         if (!(p[2] & 1)) {
 349                                 if (buf != NULL)
 350                                         buffer_filled(dev, dma_q, buf);
 351                                 get_next_buf(dma_q, &buf);
 352                                 if (buf == NULL)
 353                                         outp = NULL;
 354                                 else
 355                                         outp = videobuf_to_vmalloc(&buf->vb);
 356                         }
 357
 358                         if (buf != NULL) {
 359                                 if (p[2] & 1)
 360                                         buf->top_field = 0;
 361                                 else
 362                                         buf->top_field = 1;
 363                         }
 364
 365                         dma_q->pos = 0;
 366                 }
 367                 if (buf != NULL)
 368                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 369         }
 370         return rc;
 371 }
 372
 373 /* ------------------------------------------------------------------
 374         URB control
 375    ------------------------------------------------------------------*/
 376
 377 /*
 378  * IRQ callback, called by URB callback
 379  */
 380 static void em28xx_irq_callback(struct urb *urb)
 381 {
 382         struct em28xx_dmaqueue  *dma_q = urb->context;
 383         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 384         int rc, i;
 385
 386         /* Copy data from URB */
 387         spin_lock(&dev->slock);
 388         rc = em28xx_isoc_copy(urb);
 389         spin_unlock(&dev->slock);
 390
 391         /* Reset urb buffers */
 392         for (i = 0; i < urb->number_of_packets; i++) {
 393                 urb->iso_frame_desc[i].status = 0;
 394                 urb->iso_frame_desc[i].actual_length = 0;
 395         }
 396         urb->status = 0;
 397
 398         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
 399         if (urb->status) {
 400                 em28xx_err("urb resubmit failed (error=%i)\n",
 401                         urb->status);
 402         }
 403 }
 404
 405 /*
 406  * Stop and Deallocate URBs
 407  */
 408 static void em28xx_uninit_isoc(struct em28xx *dev)
 409 {
 410         struct urb *urb;
 411         int i;
 412
 413         em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
 414
 415         dev->isoc_ctl.nfields = -1;
 416         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 417                 urb = dev->isoc_ctl.urb[i];
 418                 if (urb) {
 419                         usb_kill_urb(urb);
 420                         usb_unlink_urb(urb);
 421                         if (dev->isoc_ctl.transfer_buffer[i]) {
 422                                 usb_buffer_free(dev->udev,
 423                                                 urb->transfer_buffer_length,
 424                                                 dev->isoc_ctl.transfer_buffer[i],
 425                                                 urb->transfer_dma);
 426                         }
 427                         usb_free_urb(urb);
 428                         dev->isoc_ctl.urb[i] = NULL;
 429                 }
 430                 dev->isoc_ctl.transfer_buffer[i] = NULL;
 431         }
 432
 433         kfree(dev->isoc_ctl.urb);
 434         kfree(dev->isoc_ctl.transfer_buffer);
 435         dev->isoc_ctl.urb = NULL;
 436         dev->isoc_ctl.transfer_buffer = NULL;
 437
 438         dev->isoc_ctl.num_bufs = 0;
 439
 440         em28xx_capture_start(dev, 0);
 441 }
 442
 443 /*
 444  * Allocate URBs and start IRQ
 445  */
 446 static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets,
 447                                int num_bufs)
 448 {
 449         struct em28xx_dmaqueue *dma_q = &dev->vidq;
 450         int i;
 451         int sb_size, pipe;
 452         struct urb *urb;
 453         int j, k;
 454
 455         em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
 456
 457         /* De-allocates all pending stuff */
 458         em28xx_uninit_isoc(dev);
 459
 460         dev->isoc_ctl.num_bufs = num_bufs;
 461
 462         dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs,  GFP_KERNEL);
 463         if (!dev->isoc_ctl.urb) {
 464                 em28xx_errdev("cannot alloc memory for usb buffers\n");
 465                 return -ENOMEM;
 466         }
 467
 468         dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
 469                                               GFP_KERNEL);
 470         if (!dev->isoc_ctl.urb) {
 471                 em28xx_errdev("cannot allocate memory for usbtransfer\n");
 472                 kfree(dev->isoc_ctl.urb);
 473                 return -ENOMEM;
 474         }
 475
 476         dev->isoc_ctl.max_pkt_size = dev->max_pkt_size;
 477         dev->isoc_ctl.buf = NULL;
 478
 479         sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
 480
 481         /* allocate urbs and transfer buffers */
 482         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 483                 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
 484                 if (!urb) {
 485                         em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
 486                         em28xx_uninit_isoc(dev);
 487                         return -ENOMEM;
 488                 }
 489                 dev->isoc_ctl.urb[i] = urb;
 490
 491                 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
 492                         sb_size, GFP_KERNEL, &urb->transfer_dma);
 493                 if (!dev->isoc_ctl.transfer_buffer[i]) {
 494                         em28xx_err("unable to allocate %i bytes for transfer"
 495                                         " buffer %i%s\n",
 496                                         sb_size, i,
 497                                         in_interrupt()?" while in int":"");
 498                         em28xx_uninit_isoc(dev);
 499                         return -ENOMEM;
 500                 }
 501                 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
 502
 503                 /* FIXME: this is a hack - should be
 504                         'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
 505                         should also be using 'desc.bInterval'
 506                  */
 507                 pipe = usb_rcvisocpipe(dev->udev, 0x82);
 508                 usb_fill_int_urb(urb, dev->udev, pipe,
 509                                  dev->isoc_ctl.transfer_buffer[i], sb_size,
 510                                  em28xx_irq_callback, dma_q, 1);
 511
 512                 urb->number_of_packets = max_packets;
 513                 urb->transfer_flags = URB_ISO_ASAP;
 514
 515                 k = 0;
 516                 for (j = 0; j < max_packets; j++) {
 517                         urb->iso_frame_desc[j].offset = k;
 518                         urb->iso_frame_desc[j].length =
 519                                                 dev->isoc_ctl.max_pkt_size;
 520                         k += dev->isoc_ctl.max_pkt_size;
 521                 }
 522         }
 523
 524         return 0;
 525 }
 526
 527 static int em28xx_start_thread(struct em28xx_dmaqueue  *dma_q)
 528 {
 529         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 530         int i, rc = 0;
 531
 532         em28xx_videodbg("Called em28xx_start_thread\n");
 533
 534         init_waitqueue_head(&dma_q->wq);
 535
 536         em28xx_capture_start(dev, 1);
 537
 538         /* submit urbs and enables IRQ */
 539         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 540                 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
 541                 if (rc) {
 542                         em28xx_err("submit of urb %i failed (error=%i)\n", i,
 543                                    rc);
 544                         em28xx_uninit_isoc(dev);
 545                         return rc;
 546                 }
 547         }
 548
 549         if (rc < 0)
 550                 return rc;
 551
 552         return 0;
 553 }
 554
 555 /* ------------------------------------------------------------------
 556         Videobuf operations
 557    ------------------------------------------------------------------*/
 558
 559 static int
 560 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 561 {
 562         struct em28xx_fh *fh = vq->priv_data;
 563         struct em28xx        *dev = fh->dev;
 564         struct v4l2_frequency f;
 565
 566         *size = 16 * fh->dev->width * fh->dev->height >> 3;
 567         if (0 == *count)
 568                 *count = EM28XX_DEF_BUF;
 569
 570         if (*count < EM28XX_MIN_BUF)
 571                 *count = EM28XX_MIN_BUF;
 572
 573         dev->mode = EM28XX_ANALOG_MODE;
 574
 575         /* Ask tuner to go to analog mode */
 576         memset (&f, 0, sizeof(f));
 577         f.frequency = dev->ctl_freq;
 578
 579         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 580
 581         return 0;
 582 }
 583
 584 /* This is called *without* dev->slock held; please keep it that way */
 585 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 586 {
 587         struct em28xx_fh     *fh  = vq->priv_data;
 588         struct em28xx        *dev = fh->dev;
 589         unsigned long flags = 0;
 590         if (in_interrupt())
 591                 BUG();
 592
 593         /* We used to wait for the buffer to finish here, but this didn't work
 594            because, as we were keeping the state as VIDEOBUF_QUEUED,
 595            videobuf_queue_cancel marked it as finished for us.
 596            (Also, it could wedge forever if the hardware was misconfigured.)
 597
 598            This should be safe; by the time we get here, the buffer isn't
 599            queued anymore. If we ever start marking the buffers as
 600            VIDEOBUF_ACTIVE, it won't be, though.
 601         */
 602         spin_lock_irqsave(&dev->slock, flags);
 603         if (dev->isoc_ctl.buf == buf)
 604                 dev->isoc_ctl.buf = NULL;
 605         spin_unlock_irqrestore(&dev->slock, flags);
 606
 607         videobuf_vmalloc_free(&buf->vb);
 608         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 609 }
 610
 611 static int
 612 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 613                                                 enum v4l2_field field)
 614 {
 615         struct em28xx_fh     *fh  = vq->priv_data;
 616         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 617         struct em28xx        *dev = fh->dev;
 618         struct em28xx_dmaqueue *vidq = &dev->vidq;
 619         int                  rc = 0, urb_init = 0;
 620
 621         /* FIXME: It assumes depth = 16 */
 622         /* The only currently supported format is 16 bits/pixel */
 623         buf->vb.size = 16 * dev->width * dev->height >> 3;
 624
 625         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 626                 return -EINVAL;
 627
 628         buf->vb.width  = dev->width;
 629         buf->vb.height = dev->height;
 630         buf->vb.field  = field;
 631
 632         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 633                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 634                 if (rc < 0)
 635                         goto fail;
 636         }
 637
 638         if (!dev->isoc_ctl.num_bufs)
 639                 urb_init = 1;
 640
 641         if (urb_init) {
 642                 rc = em28xx_prepare_isoc(dev, EM28XX_NUM_PACKETS,
 643                                          EM28XX_NUM_BUFS);
 644                 if (rc < 0)
 645                         goto fail;
 646
 647                 rc = em28xx_start_thread(vidq);
 648                 if (rc < 0)
 649                         goto fail;
 650         }
 651
 652         buf->vb.state = VIDEOBUF_PREPARED;
 653         return 0;
 654
 655 fail:
 656         free_buffer(vq, buf);
 657         return rc;
 658 }
 659
 660 static void
 661 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 662 {
 663         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
 664         struct em28xx_fh        *fh      = vq->priv_data;
 665         struct em28xx           *dev     = fh->dev;
 666         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 667
 668         buf->vb.state = VIDEOBUF_QUEUED;
 669         list_add_tail(&buf->vb.queue, &vidq->active);
 670
 671 }
 672
 673 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 674 {
 675         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
 676         struct em28xx_fh       *fh   = vq->priv_data;
 677         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 678
 679         em28xx_isocdbg("em28xx: called buffer_release\n");
 680
 681         free_buffer(vq, buf);
 682 }
 683
 684 static struct videobuf_queue_ops em28xx_video_qops = {
 685         .buf_setup      = buffer_setup,
 686         .buf_prepare    = buffer_prepare,
 687         .buf_queue      = buffer_queue,
 688         .buf_release    = buffer_release,
 689 };
 690
 691 /*********************  v4l2 interface  ******************************************/
 692
 693 /*
 694  * em28xx_config()
 695  * inits registers with sane defaults
 696  */
 697 static int em28xx_config(struct em28xx *dev)
 698 {
 699
 700         /* Sets I2C speed to 100 KHz */
 701         if (!dev->is_em2800)
 702                 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 703
 704         /* enable vbi capturing */
 705
 706 /*      em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
 707 /*      em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
 708         em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
 709
 710         dev->mute = 1;          /* maybe not the right place... */
 711         dev->volume = 0x1f;
 712
 713         em28xx_outfmt_set_yuv422(dev);
 714         em28xx_colorlevels_set_default(dev);
 715         em28xx_compression_disable(dev);
 716
 717         return 0;
 718 }
 719
 720 /*
 721  * em28xx_config_i2c()
 722  * configure i2c attached devices
 723  */
 724 static void em28xx_config_i2c(struct em28xx *dev)
 725 {
 726         struct v4l2_routing route;
 727
 728         route.input = INPUT(dev->ctl_input)->vmux;
 729         route.output = 0;
 730         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 731         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 732         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 733 }
 734
 735 static void video_mux(struct em28xx *dev, int index)
 736 {
 737         struct v4l2_routing route;
 738
 739         route.input = INPUT(index)->vmux;
 740         route.output = 0;
 741         dev->ctl_input = index;
 742         dev->ctl_ainput = INPUT(index)->amux;
 743
 744         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 745
 746         if (dev->has_msp34xx) {
 747                 if (dev->i2s_speed)
 748                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 749                 route.input = dev->ctl_ainput;
 750                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 751                 /* Note: this is msp3400 specific */
 752                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
 753         }
 754
 755         em28xx_audio_analog_set(dev);
 756 }
 757
 758 /* Usage lock check functions */
 759 static int res_get(struct em28xx_fh *fh)
 760 {
 761         struct em28xx    *dev = fh->dev;
 762         int              rc   = 0;
 763
 764         /* This instance already has stream_on */
 765         if (fh->stream_on)
 766                 return rc;
 767
 768         if (dev->stream_on)
 769                 return -EINVAL;
 770
 771         mutex_lock(&dev->lock);
 772         dev->stream_on = 1;
 773         fh->stream_on  = 1;
 774         mutex_unlock(&dev->lock);
 775         return rc;
 776 }
 777
 778 static int res_check(struct em28xx_fh *fh)
 779 {
 780         return (fh->stream_on);
 781 }
 782
 783 static void res_free(struct em28xx_fh *fh)
 784 {
 785         struct em28xx    *dev = fh->dev;
 786
 787         mutex_lock(&dev->lock);
 788         fh->stream_on = 0;
 789         dev->stream_on = 0;
 790         mutex_unlock(&dev->lock);
 791 }
 792
 793 /*
 794  * em28xx_get_ctrl()
 795  * return the current saturation, brightness or contrast, mute state
 796  */
 797 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 798 {
 799         switch (ctrl->id) {
 800         case V4L2_CID_AUDIO_MUTE:
 801                 ctrl->value = dev->mute;
 802                 return 0;
 803         case V4L2_CID_AUDIO_VOLUME:
 804                 ctrl->value = dev->volume;
 805                 return 0;
 806         default:
 807                 return -EINVAL;
 808         }
 809 }
 810
 811 /*
 812  * em28xx_set_ctrl()
 813  * mute or set new saturation, brightness or contrast
 814  */
 815 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 816 {
 817         switch (ctrl->id) {
 818         case V4L2_CID_AUDIO_MUTE:
 819                 if (ctrl->value != dev->mute) {
 820                         dev->mute = ctrl->value;
 821                         return em28xx_audio_analog_set(dev);
 822                 }
 823                 return 0;
 824         case V4L2_CID_AUDIO_VOLUME:
 825                 dev->volume = ctrl->value;
 826                 return em28xx_audio_analog_set(dev);
 827         default:
 828                 return -EINVAL;
 829         }
 830 }
 831
 832 static int check_dev(struct em28xx *dev)
 833 {
 834         if (dev->state & DEV_DISCONNECTED) {
 835                 em28xx_errdev("v4l2 ioctl: device not present\n");
 836                 return -ENODEV;
 837         }
 838
 839         if (dev->state & DEV_MISCONFIGURED) {
 840                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 841                               "close and open it again\n");
 842                 return -EIO;
 843         }
 844         return 0;
 845 }
 846
 847 static void get_scale(struct em28xx *dev,
 848                         unsigned int width, unsigned int height,
 849                         unsigned int *hscale, unsigned int *vscale)
 850 {
 851         unsigned int          maxw   = norm_maxw(dev);
 852         unsigned int          maxh   = norm_maxh(dev);
 853
 854         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 855         if (*hscale >= 0x4000)
 856                 *hscale = 0x3fff;
 857
 858         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 859         if (*vscale >= 0x4000)
 860                 *vscale = 0x3fff;
 861 }
 862
 863 /* ------------------------------------------------------------------
 864         IOCTL vidioc handling
 865    ------------------------------------------------------------------*/
 866
 867 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 868                                         struct v4l2_format *f)
 869 {
 870         struct em28xx_fh      *fh  = priv;
 871         struct em28xx         *dev = fh->dev;
 872
 873         mutex_lock(&dev->lock);
 874
 875         f->fmt.pix.width = dev->width;
 876         f->fmt.pix.height = dev->height;
 877         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 878         f->fmt.pix.bytesperline = dev->width * 2;
 879         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 880         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 881
 882         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 883         f->fmt.pix.field = dev->interlaced ?
 884                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 885
 886         mutex_unlock(&dev->lock);
 887         return 0;
 888 }
 889
 890 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 891                         struct v4l2_format *f)
 892 {
 893         struct em28xx_fh      *fh    = priv;
 894         struct em28xx         *dev   = fh->dev;
 895         int                   width  = f->fmt.pix.width;
 896         int                   height = f->fmt.pix.height;
 897         unsigned int          maxw   = norm_maxw(dev);
 898         unsigned int          maxh   = norm_maxh(dev);
 899         unsigned int          hscale, vscale;
 900
 901         /* width must even because of the YUYV format
 902            height must be even because of interlacing */
 903         height &= 0xfffe;
 904         width &= 0xfffe;
 905
 906         if (height < 32)
 907                 height = 32;
 908         if (height > maxh)
 909                 height = maxh;
 910         if (width < 48)
 911                 width = 48;
 912         if (width > maxw)
 913                 width = maxw;
 914
 915         mutex_lock(&dev->lock);
 916
 917         if (dev->is_em2800) {
 918                 /* the em2800 can only scale down to 50% */
 919                 if (height % (maxh / 2))
 920                         height = maxh;
 921                 if (width % (maxw / 2))
 922                         width = maxw;
 923                 /* according to empiatech support */
 924                 /* the MaxPacketSize is to small to support */
 925                 /* framesizes larger than 640x480 @ 30 fps */
 926                 /* or 640x576 @ 25 fps. As this would cut */
 927                 /* of a part of the image we prefer */
 928                 /* 360x576 or 360x480 for now */
 929                 if (width == maxw && height == maxh)
 930                         width /= 2;
 931         }
 932
 933         get_scale(dev, width, height, &hscale, &vscale);
 934
 935         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 936         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 937
 938         f->fmt.pix.width = width;
 939         f->fmt.pix.height = height;
 940         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 941         f->fmt.pix.bytesperline = width * 2;
 942         f->fmt.pix.sizeimage = width * 2 * height;
 943         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 944         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 945
 946         mutex_unlock(&dev->lock);
 947         return 0;
 948 }
 949
 950 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 951                         struct v4l2_format *f)
 952 {
 953         struct em28xx_fh      *fh  = priv;
 954         struct em28xx         *dev = fh->dev;
 955         int                   rc;
 956
 957         rc = check_dev(dev);
 958         if (rc < 0)
 959                 return rc;
 960
 961         vidioc_try_fmt_cap(file, priv, f);
 962
 963         mutex_lock(&dev->lock);
 964
 965         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 966                 em28xx_errdev("%s queue busy\n", __func__);
 967                 rc = -EBUSY;
 968                 goto out;
 969         }
 970
 971         if (dev->stream_on && !fh->stream_on) {
 972                 em28xx_errdev("%s device in use by another fh\n", __func__);
 973                 rc = -EBUSY;
 974                 goto out;
 975         }
 976
 977         /* set new image size */
 978         dev->width = f->fmt.pix.width;
 979         dev->height = f->fmt.pix.height;
 980         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 981
 982         em28xx_set_alternate(dev);
 983         em28xx_resolution_set(dev);
 984
 985         rc = 0;
 986
 987 out:
 988         mutex_unlock(&dev->lock);
 989         return rc;
 990 }
 991
 992 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
 993 {
 994         struct em28xx_fh   *fh  = priv;
 995         struct em28xx      *dev = fh->dev;
 996         struct v4l2_format f;
 997         int                rc;
 998
 999         rc = check_dev(dev);
1000         if (rc < 0)
1001                 return rc;
1002
1003         mutex_lock(&dev->lock);
1004         dev->norm = *norm;
1005         mutex_unlock(&dev->lock);
1006
1007         /* Adjusts width/height, if needed */
1008         f.fmt.pix.width = dev->width;
1009         f.fmt.pix.height = dev->height;
1010         vidioc_try_fmt_cap(file, priv, &f);
1011
1012         mutex_lock(&dev->lock);
1013
1014         /* set new image size */
1015         dev->width = f.fmt.pix.width;
1016         dev->height = f.fmt.pix.height;
1017         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1018
1019         em28xx_resolution_set(dev);
1020         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
1021
1022         mutex_unlock(&dev->lock);
1023         return 0;
1024 }
1025
1026 static const char *iname[] = {
1027         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1028         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1029         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1030         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1031         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1032         [EM28XX_VMUX_TELEVISION] = "Television",
1033         [EM28XX_VMUX_CABLE]      = "Cable TV",
1034         [EM28XX_VMUX_DVB]        = "DVB",
1035         [EM28XX_VMUX_DEBUG]      = "for debug only",
1036 };
1037
1038 static int vidioc_enum_input(struct file *file, void *priv,
1039                                 struct v4l2_input *i)
1040 {
1041         struct em28xx_fh   *fh  = priv;
1042         struct em28xx      *dev = fh->dev;
1043         unsigned int       n;
1044
1045         n = i->index;
1046         if (n >= MAX_EM28XX_INPUT)
1047                 return -EINVAL;
1048         if (0 == INPUT(n)->type)
1049                 return -EINVAL;
1050
1051         i->index = n;
1052         i->type = V4L2_INPUT_TYPE_CAMERA;
1053
1054         strcpy(i->name, iname[INPUT(n)->type]);
1055
1056         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1057                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1058                 i->type = V4L2_INPUT_TYPE_TUNER;
1059
1060         i->std = dev->vdev->tvnorms;
1061
1062         return 0;
1063 }
1064
1065 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1066 {
1067         struct em28xx_fh   *fh  = priv;
1068         struct em28xx      *dev = fh->dev;
1069
1070         *i = dev->ctl_input;
1071
1072         return 0;
1073 }
1074
1075 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1076 {
1077         struct em28xx_fh   *fh  = priv;
1078         struct em28xx      *dev = fh->dev;
1079         int                rc;
1080
1081         rc = check_dev(dev);
1082         if (rc < 0)
1083                 return rc;
1084
1085         if (i >= MAX_EM28XX_INPUT)
1086                 return -EINVAL;
1087         if (0 == INPUT(i)->type)
1088                 return -EINVAL;
1089
1090         mutex_lock(&dev->lock);
1091
1092         video_mux(dev, i);
1093
1094         mutex_unlock(&dev->lock);
1095         return 0;
1096 }
1097
1098 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1099 {
1100         struct em28xx_fh   *fh    = priv;
1101         struct em28xx      *dev   = fh->dev;
1102         unsigned int        index = a->index;
1103
1104         if (a->index > 1)
1105                 return -EINVAL;
1106
1107         index = dev->ctl_ainput;
1108
1109         if (index == 0) {
1110                 strcpy(a->name, "Television");
1111         } else {
1112                 strcpy(a->name, "Line In");
1113         }
1114         a->capability = V4L2_AUDCAP_STEREO;
1115         a->index = index;
1116
1117         return 0;
1118 }
1119
1120 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1121 {
1122         struct em28xx_fh   *fh  = priv;
1123         struct em28xx      *dev = fh->dev;
1124
1125         if (a->index != dev->ctl_ainput)
1126                 return -EINVAL;
1127
1128         return 0;
1129 }
1130
1131 static int vidioc_queryctrl(struct file *file, void *priv,
1132                                 struct v4l2_queryctrl *qc)
1133 {
1134         struct em28xx_fh      *fh  = priv;
1135         struct em28xx         *dev = fh->dev;
1136         int                   id  = qc->id;
1137         int                   i;
1138         int                   rc;
1139
1140         rc = check_dev(dev);
1141         if (rc < 0)
1142                 return rc;
1143
1144         memset(qc, 0, sizeof(*qc));
1145
1146         qc->id = id;
1147
1148         if (!dev->has_msp34xx) {
1149                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1150                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1151                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1152                                 return 0;
1153                         }
1154                 }
1155         }
1156         mutex_lock(&dev->lock);
1157         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1158         mutex_unlock(&dev->lock);
1159
1160         if (qc->type)
1161                 return 0;
1162         else
1163                 return -EINVAL;
1164 }
1165
1166 static int vidioc_g_ctrl(struct file *file, void *priv,
1167                                 struct v4l2_control *ctrl)
1168 {
1169         struct em28xx_fh      *fh  = priv;
1170         struct em28xx         *dev = fh->dev;
1171         int                   rc;
1172
1173         rc = check_dev(dev);
1174         if (rc < 0)
1175                 return rc;
1176         mutex_lock(&dev->lock);
1177
1178         if (!dev->has_msp34xx)
1179                 rc = em28xx_get_ctrl(dev, ctrl);
1180         else
1181                 rc = -EINVAL;
1182
1183         if (rc == -EINVAL) {
1184                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1185                 rc = 0;
1186         }
1187
1188         mutex_unlock(&dev->lock);
1189         return rc;
1190 }
1191
1192 static int vidioc_s_ctrl(struct file *file, void *priv,
1193                                 struct v4l2_control *ctrl)
1194 {
1195         struct em28xx_fh      *fh  = priv;
1196         struct em28xx         *dev = fh->dev;
1197         u8                    i;
1198         int                   rc;
1199
1200         rc = check_dev(dev);
1201         if (rc < 0)
1202                 return rc;
1203
1204         mutex_lock(&dev->lock);
1205
1206         if (dev->has_msp34xx)
1207                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1208         else {
1209                 rc = 1;
1210                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1211                         if (ctrl->id == em28xx_qctrl[i].id) {
1212                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1213                                     ctrl->value > em28xx_qctrl[i].maximum) {
1214                                         rc = -ERANGE;
1215                                         break;
1216                                 }
1217
1218                                 rc = em28xx_set_ctrl(dev, ctrl);
1219                                 break;
1220                         }
1221                 }
1222         }
1223
1224         /* Control not found - try to send it to the attached devices */
1225         if (rc == 1) {
1226                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1227                 rc = 0;
1228         }
1229
1230         mutex_unlock(&dev->lock);
1231         return rc;
1232 }
1233
1234 static int vidioc_g_tuner(struct file *file, void *priv,
1235                                 struct v4l2_tuner *t)
1236 {
1237         struct em28xx_fh      *fh  = priv;
1238         struct em28xx         *dev = fh->dev;
1239         int                   rc;
1240
1241         rc = check_dev(dev);
1242         if (rc < 0)
1243                 return rc;
1244
1245         if (0 != t->index)
1246                 return -EINVAL;
1247
1248         strcpy(t->name, "Tuner");
1249
1250         mutex_lock(&dev->lock);
1251
1252         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1253
1254         mutex_unlock(&dev->lock);
1255         return 0;
1256 }
1257
1258 static int vidioc_s_tuner(struct file *file, void *priv,
1259                                 struct v4l2_tuner *t)
1260 {
1261         struct em28xx_fh      *fh  = priv;
1262         struct em28xx         *dev = fh->dev;
1263         int                   rc;
1264
1265         rc = check_dev(dev);
1266         if (rc < 0)
1267                 return rc;
1268
1269         if (0 != t->index)
1270                 return -EINVAL;
1271
1272         mutex_lock(&dev->lock);
1273
1274         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1275
1276         mutex_unlock(&dev->lock);
1277         return 0;
1278 }
1279
1280 static int vidioc_g_frequency(struct file *file, void *priv,
1281                                 struct v4l2_frequency *f)
1282 {
1283         struct em28xx_fh      *fh  = priv;
1284         struct em28xx         *dev = fh->dev;
1285
1286         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1287         f->frequency = dev->ctl_freq;
1288
1289         return 0;
1290 }
1291
1292 static int vidioc_s_frequency(struct file *file, void *priv,
1293                                 struct v4l2_frequency *f)
1294 {
1295         struct em28xx_fh      *fh  = priv;
1296         struct em28xx         *dev = fh->dev;
1297         int                   rc;
1298
1299         rc = check_dev(dev);
1300         if (rc < 0)
1301                 return rc;
1302
1303         if (0 != f->tuner)
1304                 return -EINVAL;
1305
1306         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1307                 return -EINVAL;
1308         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1309                 return -EINVAL;
1310
1311         mutex_lock(&dev->lock);
1312
1313         dev->ctl_freq = f->frequency;
1314         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1315
1316         mutex_unlock(&dev->lock);
1317         return 0;
1318 }
1319
1320 #ifdef CONFIG_VIDEO_ADV_DEBUG
1321 static int em28xx_reg_len(int reg)
1322 {
1323         switch (reg) {
1324         case AC97LSB_REG:
1325         case HSCALELOW_REG:
1326         case VSCALELOW_REG:
1327                 return 2;
1328         default:
1329                 return 1;
1330         }
1331 }
1332
1333 static int vidioc_g_register(struct file *file, void *priv,
1334                              struct v4l2_register *reg)
1335 {
1336         struct em28xx_fh      *fh  = priv;
1337         struct em28xx         *dev = fh->dev;
1338         int ret;
1339
1340         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1341                 return -EINVAL;
1342
1343         if (em28xx_reg_len(reg->reg) == 1) {
1344                 ret = em28xx_read_reg(dev, reg->reg);
1345                 if (ret < 0)
1346                         return ret;
1347
1348                 reg->val = ret;
1349         } else {
1350                 u64 val = 0;
1351                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1352                                                    reg->reg, (char *)&val, 2);
1353                 if (ret < 0)
1354                         return ret;
1355
1356                 reg->val = cpu_to_le64((__u64)val);
1357         }
1358
1359         return 0;
1360 }
1361
1362 static int vidioc_s_register(struct file *file, void *priv,
1363                              struct v4l2_register *reg)
1364 {
1365         struct em28xx_fh      *fh  = priv;
1366         struct em28xx         *dev = fh->dev;
1367         u64 buf;
1368
1369         buf = le64_to_cpu((__u64)reg->val);
1370
1371         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1372                                  em28xx_reg_len(reg->reg));
1373 }
1374 #endif
1375
1376
1377 static int vidioc_cropcap(struct file *file, void *priv,
1378                                         struct v4l2_cropcap *cc)
1379 {
1380         struct em28xx_fh      *fh  = priv;
1381         struct em28xx         *dev = fh->dev;
1382
1383         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1384                 return -EINVAL;
1385
1386         cc->bounds.left = 0;
1387         cc->bounds.top = 0;
1388         cc->bounds.width = dev->width;
1389         cc->bounds.height = dev->height;
1390         cc->defrect = cc->bounds;
1391         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1392         cc->pixelaspect.denominator = 59;
1393
1394         return 0;
1395 }
1396
1397 static int vidioc_streamon(struct file *file, void *priv,
1398                                         enum v4l2_buf_type type)
1399 {
1400         struct em28xx_fh      *fh  = priv;
1401         struct em28xx         *dev = fh->dev;
1402         int                   rc;
1403
1404         rc = check_dev(dev);
1405         if (rc < 0)
1406                 return rc;
1407
1408
1409         if (unlikely(res_get(fh) < 0))
1410                 return -EBUSY;
1411
1412         return (videobuf_streamon(&fh->vb_vidq));
1413 }
1414
1415 static int vidioc_streamoff(struct file *file, void *priv,
1416                                         enum v4l2_buf_type type)
1417 {
1418         struct em28xx_fh      *fh  = priv;
1419         struct em28xx         *dev = fh->dev;
1420         int                   rc;
1421
1422         rc = check_dev(dev);
1423         if (rc < 0)
1424                 return rc;
1425
1426         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1427                 return -EINVAL;
1428         if (type != fh->type)
1429                 return -EINVAL;
1430
1431         videobuf_streamoff(&fh->vb_vidq);
1432         res_free(fh);
1433
1434         return 0;
1435 }
1436
1437 static int vidioc_querycap(struct file *file, void  *priv,
1438                                         struct v4l2_capability *cap)
1439 {
1440         struct em28xx_fh      *fh  = priv;
1441         struct em28xx         *dev = fh->dev;
1442
1443         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1444         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1445         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1446
1447         cap->version = EM28XX_VERSION_CODE;
1448
1449         cap->capabilities =
1450                         V4L2_CAP_SLICED_VBI_CAPTURE |
1451                         V4L2_CAP_VIDEO_CAPTURE |
1452                         V4L2_CAP_AUDIO |
1453                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1454
1455         if (dev->tuner_type != TUNER_ABSENT)
1456                 cap->capabilities |= V4L2_CAP_TUNER;
1457
1458         return 0;
1459 }
1460
1461 static int vidioc_enum_fmt_cap(struct file *file, void  *priv,
1462                                         struct v4l2_fmtdesc *fmtd)
1463 {
1464         if (fmtd->index != 0)
1465                 return -EINVAL;
1466
1467         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1468         strcpy(fmtd->description, "Packed YUY2");
1469         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1470         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1471
1472         return 0;
1473 }
1474
1475 /* Sliced VBI ioctls */
1476 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1477                                         struct v4l2_format *f)
1478 {
1479         struct em28xx_fh      *fh  = priv;
1480         struct em28xx         *dev = fh->dev;
1481         int                   rc;
1482
1483         rc = check_dev(dev);
1484         if (rc < 0)
1485                 return rc;
1486
1487         mutex_lock(&dev->lock);
1488
1489         f->fmt.sliced.service_set = 0;
1490
1491         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1492
1493         if (f->fmt.sliced.service_set == 0)
1494                 rc = -EINVAL;
1495
1496         mutex_unlock(&dev->lock);
1497         return rc;
1498 }
1499
1500 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1501                         struct v4l2_format *f)
1502 {
1503         struct em28xx_fh      *fh  = priv;
1504         struct em28xx         *dev = fh->dev;
1505         int                   rc;
1506
1507         rc = check_dev(dev);
1508         if (rc < 0)
1509                 return rc;
1510
1511         mutex_lock(&dev->lock);
1512         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1513         mutex_unlock(&dev->lock);
1514
1515         if (f->fmt.sliced.service_set == 0)
1516                 return -EINVAL;
1517
1518         return 0;
1519 }
1520
1521
1522 static int vidioc_reqbufs(struct file *file, void *priv,
1523                           struct v4l2_requestbuffers *rb)
1524 {
1525         struct em28xx_fh      *fh  = priv;
1526         struct em28xx         *dev = fh->dev;
1527         int                   rc;
1528
1529         rc = check_dev(dev);
1530         if (rc < 0)
1531                 return rc;
1532
1533         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1534 }
1535
1536 static int vidioc_querybuf(struct file *file, void *priv,
1537                            struct v4l2_buffer *b)
1538 {
1539         struct em28xx_fh      *fh  = priv;
1540         struct em28xx         *dev = fh->dev;
1541         int                   rc;
1542
1543         rc = check_dev(dev);
1544         if (rc < 0)
1545                 return rc;
1546
1547         return (videobuf_querybuf(&fh->vb_vidq, b));
1548 }
1549
1550 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1551 {
1552         struct em28xx_fh      *fh  = priv;
1553         struct em28xx         *dev = fh->dev;
1554         int                   rc;
1555
1556         rc = check_dev(dev);
1557         if (rc < 0)
1558                 return rc;
1559
1560         return (videobuf_qbuf(&fh->vb_vidq, b));
1561 }
1562
1563 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1564 {
1565         struct em28xx_fh      *fh  = priv;
1566         struct em28xx         *dev = fh->dev;
1567         int                   rc;
1568
1569         rc = check_dev(dev);
1570         if (rc < 0)
1571                 return rc;
1572
1573         return (videobuf_dqbuf(&fh->vb_vidq, b,
1574                                 file->f_flags & O_NONBLOCK));
1575 }
1576
1577 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1578 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1579 {
1580         struct em28xx_fh  *fh = priv;
1581
1582         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1583 }
1584 #endif
1585
1586
1587 /* ----------------------------------------------------------- */
1588 /* RADIO ESPECIFIC IOCTLS                                      */
1589 /* ----------------------------------------------------------- */
1590
1591 static int radio_querycap(struct file *file, void  *priv,
1592                           struct v4l2_capability *cap)
1593 {
1594         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1595
1596         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1597         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1598         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1599
1600         cap->version = EM28XX_VERSION_CODE;
1601         cap->capabilities = V4L2_CAP_TUNER;
1602         return 0;
1603 }
1604
1605 static int radio_g_tuner(struct file *file, void *priv,
1606                          struct v4l2_tuner *t)
1607 {
1608         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1609
1610         if (unlikely(t->index > 0))
1611                 return -EINVAL;
1612
1613         strcpy(t->name, "Radio");
1614         t->type = V4L2_TUNER_RADIO;
1615
1616         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1617         return 0;
1618 }
1619
1620 static int radio_enum_input(struct file *file, void *priv,
1621                             struct v4l2_input *i)
1622 {
1623         if (i->index != 0)
1624                 return -EINVAL;
1625         strcpy(i->name, "Radio");
1626         i->type = V4L2_INPUT_TYPE_TUNER;
1627
1628         return 0;
1629 }
1630
1631 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1632 {
1633         if (unlikely(a->index))
1634                 return -EINVAL;
1635
1636         strcpy(a->name, "Radio");
1637         return 0;
1638 }
1639
1640 static int radio_s_tuner(struct file *file, void *priv,
1641                          struct v4l2_tuner *t)
1642 {
1643         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1644
1645         if (0 != t->index)
1646                 return -EINVAL;
1647
1648         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1649
1650         return 0;
1651 }
1652
1653 static int radio_s_audio(struct file *file, void *fh,
1654                          struct v4l2_audio *a)
1655 {
1656         return 0;
1657 }
1658
1659 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1660 {
1661         return 0;
1662 }
1663
1664 static int radio_queryctrl(struct file *file, void *priv,
1665                            struct v4l2_queryctrl *qc)
1666 {
1667         int i;
1668
1669         if (qc->id <  V4L2_CID_BASE ||
1670                 qc->id >= V4L2_CID_LASTP1)
1671                 return -EINVAL;
1672
1673         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1674                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1675                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1676                         return 0;
1677                 }
1678         }
1679
1680         return -EINVAL;
1681 }
1682
1683 /*
1684  * em28xx_v4l2_open()
1685  * inits the device and starts isoc transfer
1686  */
1687 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1688 {
1689         int minor = iminor(inode);
1690         int errCode = 0, radio = 0;
1691         struct em28xx *h,*dev = NULL;
1692         struct em28xx_fh *fh;
1693         enum v4l2_buf_type fh_type = 0;
1694
1695         list_for_each_entry(h, &em28xx_devlist, devlist) {
1696                 if (h->vdev->minor == minor) {
1697                         dev  = h;
1698                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1699                 }
1700                 if (h->vbi_dev->minor == minor) {
1701                         dev  = h;
1702                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1703                 }
1704                 if (h->radio_dev &&
1705                     h->radio_dev->minor == minor) {
1706                         radio = 1;
1707                         dev   = h;
1708                 }
1709         }
1710         if (NULL == dev)
1711                 return -ENODEV;
1712
1713         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1714                                 minor, v4l2_type_names[fh_type], dev->users);
1715
1716         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1717
1718         if (!fh) {
1719                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1720                 return -ENOMEM;
1721         }
1722         mutex_lock(&dev->lock);
1723         fh->dev = dev;
1724         fh->radio = radio;
1725         fh->type = fh_type;
1726         filp->private_data = fh;
1727
1728         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1729                 dev->width = norm_maxw(dev);
1730                 dev->height = norm_maxh(dev);
1731                 dev->hscale = 0;
1732                 dev->vscale = 0;
1733
1734                 em28xx_set_alternate(dev);
1735                 em28xx_resolution_set(dev);
1736
1737         }
1738         if (fh->radio) {
1739                 em28xx_videodbg("video_open: setting radio device\n");
1740                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1741         }
1742
1743         dev->users++;
1744
1745         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1746                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1747                         sizeof(struct em28xx_buffer), fh);
1748
1749         mutex_unlock(&dev->lock);
1750         return errCode;
1751 }
1752
1753 /*
1754  * em28xx_realease_resources()
1755  * unregisters the v4l2,i2c and usb devices
1756  * called when the device gets disconected or at module unload
1757 */
1758 static void em28xx_release_resources(struct em28xx *dev)
1759 {
1760
1761         /*FIXME: I2C IR should be disconnected */
1762
1763         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1764                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1765                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1766         list_del(&dev->devlist);
1767         if (dev->radio_dev) {
1768                 if (-1 != dev->radio_dev->minor)
1769                         video_unregister_device(dev->radio_dev);
1770                 else
1771                         video_device_release(dev->radio_dev);
1772                 dev->radio_dev = NULL;
1773         }
1774         if (dev->vbi_dev) {
1775                 if (-1 != dev->vbi_dev->minor)
1776                         video_unregister_device(dev->vbi_dev);
1777                 else
1778                         video_device_release(dev->vbi_dev);
1779                 dev->vbi_dev = NULL;
1780         }
1781         if (dev->vdev) {
1782                 if (-1 != dev->vdev->minor)
1783                         video_unregister_device(dev->vdev);
1784                 else
1785                         video_device_release(dev->vdev);
1786                 dev->vdev = NULL;
1787         }
1788         em28xx_i2c_unregister(dev);
1789         usb_put_dev(dev->udev);
1790
1791         /* Mark device as unused */
1792         em28xx_devused&=~(1<<dev->devno);
1793 }
1794
1795 /*
1796  * em28xx_v4l2_close()
1797  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1798  */
1799 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1800 {
1801         struct em28xx_fh *fh  = filp->private_data;
1802         struct em28xx    *dev = fh->dev;
1803         int              errCode;
1804
1805         em28xx_videodbg("users=%d\n", dev->users);
1806
1807
1808         if (res_check(fh))
1809                 res_free(fh);
1810
1811         mutex_lock(&dev->lock);
1812
1813         if (dev->users == 1) {
1814                 videobuf_stop(&fh->vb_vidq);
1815                 videobuf_mmap_free(&fh->vb_vidq);
1816
1817                 /* the device is already disconnect,
1818                    free the remaining resources */
1819                 if (dev->state & DEV_DISCONNECTED) {
1820                         em28xx_release_resources(dev);
1821                         mutex_unlock(&dev->lock);
1822                         kfree(dev);
1823                         return 0;
1824                 }
1825
1826                 /* do this before setting alternate! */
1827                 em28xx_uninit_isoc(dev);
1828
1829                 /* set alternate 0 */
1830                 dev->alt = 0;
1831                 em28xx_videodbg("setting alternate 0\n");
1832                 errCode = usb_set_interface(dev->udev, 0, 0);
1833                 if (errCode < 0) {
1834                         em28xx_errdev("cannot change alternate number to "
1835                                         "0 (error=%i)\n", errCode);
1836                 }
1837         }
1838         kfree(fh);
1839         dev->users--;
1840         wake_up_interruptible_nr(&dev->open, 1);
1841         mutex_unlock(&dev->lock);
1842         return 0;
1843 }
1844
1845 /*
1846  * em28xx_v4l2_read()
1847  * will allocate buffers when called for the first time
1848  */
1849 static ssize_t
1850 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1851                  loff_t *pos)
1852 {
1853         struct em28xx_fh *fh = filp->private_data;
1854         struct em28xx *dev = fh->dev;
1855         int rc;
1856
1857         rc = check_dev(dev);
1858         if (rc < 0)
1859                 return rc;
1860
1861         /* FIXME: read() is not prepared to allow changing the video
1862            resolution while streaming. Seems a bug at em28xx_set_fmt
1863          */
1864
1865         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1866                 if (unlikely(res_get(fh)))
1867                         return -EBUSY;
1868
1869                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1870                                         filp->f_flags & O_NONBLOCK);
1871         }
1872         return 0;
1873 }
1874
1875 /*
1876  * em28xx_v4l2_poll()
1877  * will allocate buffers when called for the first time
1878  */
1879 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1880 {
1881         struct em28xx_fh *fh = filp->private_data;
1882         struct em28xx *dev = fh->dev;
1883         int rc;
1884
1885         rc = check_dev(dev);
1886         if (rc < 0)
1887                 return rc;
1888
1889         if (unlikely(res_get(fh) < 0))
1890                 return POLLERR;
1891
1892         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1893                 return POLLERR;
1894
1895         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1896 }
1897
1898 /*
1899  * em28xx_v4l2_mmap()
1900  */
1901 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1902 {
1903         struct em28xx_fh *fh    = filp->private_data;
1904         struct em28xx    *dev   = fh->dev;
1905         int              rc;
1906
1907         if (unlikely(res_get(fh) < 0))
1908                 return -EBUSY;
1909
1910         rc = check_dev(dev);
1911         if (rc < 0)
1912                 return rc;
1913
1914         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1915
1916         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1917                 (unsigned long)vma->vm_start,
1918                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1919                 rc);
1920
1921         return rc;
1922 }
1923
1924 static const struct file_operations em28xx_v4l_fops = {
1925         .owner         = THIS_MODULE,
1926         .open          = em28xx_v4l2_open,
1927         .release       = em28xx_v4l2_close,
1928         .read          = em28xx_v4l2_read,
1929         .poll          = em28xx_v4l2_poll,
1930         .mmap          = em28xx_v4l2_mmap,
1931         .ioctl         = video_ioctl2,
1932         .llseek        = no_llseek,
1933         .compat_ioctl  = v4l_compat_ioctl32,
1934 };
1935
1936 static const struct file_operations radio_fops = {
1937         .owner         = THIS_MODULE,
1938         .open          = em28xx_v4l2_open,
1939         .release       = em28xx_v4l2_close,
1940         .ioctl         = video_ioctl2,
1941         .compat_ioctl  = v4l_compat_ioctl32,
1942         .llseek        = no_llseek,
1943 };
1944
1945 static const struct video_device em28xx_video_template = {
1946         .fops                       = &em28xx_v4l_fops,
1947         .release                    = video_device_release,
1948
1949         .minor                      = -1,
1950         .vidioc_querycap            = vidioc_querycap,
1951         .vidioc_enum_fmt_cap        = vidioc_enum_fmt_cap,
1952         .vidioc_g_fmt_cap           = vidioc_g_fmt_cap,
1953         .vidioc_try_fmt_cap         = vidioc_try_fmt_cap,
1954         .vidioc_s_fmt_cap           = vidioc_s_fmt_cap,
1955         .vidioc_g_audio             = vidioc_g_audio,
1956         .vidioc_s_audio             = vidioc_s_audio,
1957         .vidioc_cropcap             = vidioc_cropcap,
1958
1959         .vidioc_g_fmt_vbi_capture   = vidioc_g_fmt_vbi_capture,
1960         .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1961         .vidioc_s_fmt_vbi_capture   = vidioc_try_set_vbi_capture,
1962
1963         .vidioc_reqbufs             = vidioc_reqbufs,
1964         .vidioc_querybuf            = vidioc_querybuf,
1965         .vidioc_qbuf                = vidioc_qbuf,
1966         .vidioc_dqbuf               = vidioc_dqbuf,
1967         .vidioc_s_std               = vidioc_s_std,
1968         .vidioc_enum_input          = vidioc_enum_input,
1969         .vidioc_g_input             = vidioc_g_input,
1970         .vidioc_s_input             = vidioc_s_input,
1971         .vidioc_queryctrl           = vidioc_queryctrl,
1972         .vidioc_g_ctrl              = vidioc_g_ctrl,
1973         .vidioc_s_ctrl              = vidioc_s_ctrl,
1974         .vidioc_streamon            = vidioc_streamon,
1975         .vidioc_streamoff           = vidioc_streamoff,
1976         .vidioc_g_tuner             = vidioc_g_tuner,
1977         .vidioc_s_tuner             = vidioc_s_tuner,
1978         .vidioc_g_frequency         = vidioc_g_frequency,
1979         .vidioc_s_frequency         = vidioc_s_frequency,
1980 #ifdef CONFIG_VIDEO_ADV_DEBUG
1981         .vidioc_g_register          = vidioc_g_register,
1982         .vidioc_s_register          = vidioc_s_register,
1983 #endif
1984 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1985         .vidiocgmbuf                = vidiocgmbuf,
1986 #endif
1987
1988         .tvnorms                    = V4L2_STD_ALL,
1989         .current_norm               = V4L2_STD_PAL,
1990 };
1991
1992 static struct video_device em28xx_radio_template = {
1993         .name                 = "em28xx-radio",
1994         .type                 = VID_TYPE_TUNER,
1995         .fops                 = &radio_fops,
1996         .minor                = -1,
1997         .vidioc_querycap      = radio_querycap,
1998         .vidioc_g_tuner       = radio_g_tuner,
1999         .vidioc_enum_input    = radio_enum_input,
2000         .vidioc_g_audio       = radio_g_audio,
2001         .vidioc_s_tuner       = radio_s_tuner,
2002         .vidioc_s_audio       = radio_s_audio,
2003         .vidioc_s_input       = radio_s_input,
2004         .vidioc_queryctrl     = radio_queryctrl,
2005         .vidioc_g_ctrl        = vidioc_g_ctrl,
2006         .vidioc_s_ctrl        = vidioc_s_ctrl,
2007         .vidioc_g_frequency   = vidioc_g_frequency,
2008         .vidioc_s_frequency   = vidioc_s_frequency,
2009 #ifdef CONFIG_VIDEO_ADV_DEBUG
2010         .vidioc_g_register    = vidioc_g_register,
2011         .vidioc_s_register    = vidioc_s_register,
2012 #endif
2013 };
2014
2015 /******************************** usb interface *****************************************/
2016
2017
2018 static LIST_HEAD(em28xx_extension_devlist);
2019 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
2020
2021 int em28xx_register_extension(struct em28xx_ops *ops)
2022 {
2023         struct em28xx *h, *dev = NULL;
2024
2025         list_for_each_entry(h, &em28xx_devlist, devlist)
2026                 dev = h;
2027
2028         mutex_lock(&em28xx_extension_devlist_lock);
2029         list_add_tail(&ops->next, &em28xx_extension_devlist);
2030         if (dev)
2031                 ops->init(dev);
2032
2033         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
2034         mutex_unlock(&em28xx_extension_devlist_lock);
2035
2036         return 0;
2037 }
2038 EXPORT_SYMBOL(em28xx_register_extension);
2039
2040 void em28xx_unregister_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         if (dev)
2048                 ops->fini(dev);
2049
2050         mutex_lock(&em28xx_extension_devlist_lock);
2051         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
2052         list_del(&ops->next);
2053         mutex_unlock(&em28xx_extension_devlist_lock);
2054 }
2055 EXPORT_SYMBOL(em28xx_unregister_extension);
2056
2057 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2058                                              const struct video_device *template,
2059                                              const int type,
2060                                              const char *type_name)
2061 {
2062         struct video_device *vfd;
2063
2064         vfd = video_device_alloc();
2065         if (NULL == vfd)
2066                 return NULL;
2067         *vfd = *template;
2068         vfd->minor   = -1;
2069         vfd->dev = &dev->udev->dev;
2070         vfd->release = video_device_release;
2071         vfd->type = type;
2072         vfd->debug = video_debug;
2073
2074         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2075                  dev->name, type_name);
2076
2077         return vfd;
2078 }
2079
2080
2081 /*
2082  * em28xx_init_dev()
2083  * allocates and inits the device structs, registers i2c bus and v4l device
2084  */
2085 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2086                            int minor)
2087 {
2088         struct em28xx_ops *ops = NULL;
2089         struct em28xx *dev = *devhandle;
2090         int retval = -ENOMEM;
2091         int errCode;
2092         unsigned int maxh, maxw;
2093
2094         dev->udev = udev;
2095         mutex_init(&dev->lock);
2096         spin_lock_init(&dev->slock);
2097         init_waitqueue_head(&dev->open);
2098         init_waitqueue_head(&dev->wait_frame);
2099         init_waitqueue_head(&dev->wait_stream);
2100
2101         dev->em28xx_write_regs = em28xx_write_regs;
2102         dev->em28xx_read_reg = em28xx_read_reg;
2103         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2104         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2105         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2106         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2107
2108         errCode = em28xx_read_reg(dev, CHIPID_REG);
2109         if (errCode >= 0)
2110                 em28xx_info("em28xx chip ID = %d\n", errCode);
2111
2112         em28xx_pre_card_setup(dev);
2113
2114         errCode = em28xx_config(dev);
2115         if (errCode) {
2116                 em28xx_errdev("error configuring device\n");
2117                 em28xx_devused &= ~(1<<dev->devno);
2118                 kfree(dev);
2119                 return -ENOMEM;
2120         }
2121
2122         /* register i2c bus */
2123         em28xx_i2c_register(dev);
2124
2125         /* Do board specific init and eeprom reading */
2126         em28xx_card_setup(dev);
2127
2128         /* Configure audio */
2129         em28xx_audio_analog_set(dev);
2130
2131         /* configure the device */
2132         em28xx_config_i2c(dev);
2133
2134         /* set default norm */
2135         dev->norm = em28xx_video_template.current_norm;
2136
2137         maxw = norm_maxw(dev);
2138         maxh = norm_maxh(dev);
2139
2140         /* set default image size */
2141         dev->width = maxw;
2142         dev->height = maxh;
2143         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2144         dev->hscale = 0;
2145         dev->vscale = 0;
2146         dev->ctl_input = 2;
2147
2148         errCode = em28xx_config(dev);
2149
2150         list_add_tail(&dev->devlist, &em28xx_devlist);
2151
2152         /* allocate and fill video video_device struct */
2153         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
2154                                           VID_TYPE_CAPTURE, "video");
2155         if (NULL == dev->vdev) {
2156                 em28xx_errdev("cannot allocate video_device.\n");
2157                 goto fail_unreg;
2158         }
2159         if (dev->tuner_type != TUNER_ABSENT)
2160                 dev->vdev->type |= VID_TYPE_TUNER;
2161
2162         /* register v4l2 video video_device */
2163         retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2164                                        video_nr[dev->devno]);
2165         if (retval) {
2166                 em28xx_errdev("unable to register video device (error=%i).\n",
2167                               retval);
2168                 goto fail_unreg;
2169         }
2170
2171         /* Allocate and fill vbi video_device struct */
2172         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2173                                           VFL_TYPE_VBI, "vbi");
2174         /* register v4l2 vbi video_device */
2175         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2176                                         vbi_nr[dev->devno]) < 0) {
2177                 em28xx_errdev("unable to register vbi device\n");
2178                 retval = -ENODEV;
2179                 goto fail_unreg;
2180         }
2181
2182         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2183                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2184                                         VFL_TYPE_RADIO, "radio");
2185                 if (NULL == dev->radio_dev) {
2186                         em28xx_errdev("cannot allocate video_device.\n");
2187                         goto fail_unreg;
2188                 }
2189                 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2190                                             radio_nr[dev->devno]);
2191                 if (retval < 0) {
2192                         em28xx_errdev("can't register radio device\n");
2193                         goto fail_unreg;
2194                 }
2195                 em28xx_info("Registered radio device as /dev/radio%d\n",
2196                             dev->radio_dev->minor & 0x1f);
2197         }
2198
2199         /* init video dma queues */
2200         INIT_LIST_HEAD(&dev->vidq.active);
2201         INIT_LIST_HEAD(&dev->vidq.queued);
2202
2203
2204         if (dev->has_msp34xx) {
2205                 /* Send a reset to other chips via gpio */
2206                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2207                 msleep(3);
2208                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2209                 msleep(3);
2210         }
2211
2212         video_mux(dev, 0);
2213
2214         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2215                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2216                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2217
2218         mutex_lock(&em28xx_extension_devlist_lock);
2219         if (!list_empty(&em28xx_extension_devlist)) {
2220                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2221                         if (ops->id)
2222                                 ops->init(dev);
2223                 }
2224         }
2225         mutex_unlock(&em28xx_extension_devlist_lock);
2226
2227         return 0;
2228
2229 fail_unreg:
2230         em28xx_release_resources(dev);
2231         mutex_unlock(&dev->lock);
2232         kfree(dev);
2233         return retval;
2234 }
2235
2236 #if defined(CONFIG_MODULES) && defined(MODULE)
2237 static void request_module_async(struct work_struct *work)
2238 {
2239         struct em28xx *dev = container_of(work,
2240                              struct em28xx, request_module_wk);
2241
2242         if (dev->has_audio_class)
2243                 request_module("snd-usb-audio");
2244         else
2245                 request_module("em28xx-alsa");
2246
2247         if (dev->has_dvb)
2248                 request_module("em28xx-dvb");
2249 }
2250
2251 static void request_modules(struct em28xx *dev)
2252 {
2253         INIT_WORK(&dev->request_module_wk, request_module_async);
2254         schedule_work(&dev->request_module_wk);
2255 }
2256 #else
2257 #define request_modules(dev)
2258 #endif /* CONFIG_MODULES */
2259
2260 /*
2261  * em28xx_usb_probe()
2262  * checks for supported devices
2263  */
2264 static int em28xx_usb_probe(struct usb_interface *interface,
2265                             const struct usb_device_id *id)
2266 {
2267         const struct usb_endpoint_descriptor *endpoint;
2268         struct usb_device *udev;
2269         struct usb_interface *uif;
2270         struct em28xx *dev = NULL;
2271         int retval = -ENODEV;
2272         int i, nr, ifnum;
2273
2274         udev = usb_get_dev(interface_to_usbdev(interface));
2275         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2276
2277         /* Check to see next free device and mark as used */
2278         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2279         em28xx_devused|=1<<nr;
2280
2281         /* Don't register audio interfaces */
2282         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2283                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2284                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
2285                                 ifnum,
2286                                 interface->altsetting[0].desc.bInterfaceClass);
2287
2288                 em28xx_devused&=~(1<<nr);
2289                 return -ENODEV;
2290         }
2291
2292         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2293                         udev->descriptor.idVendor,udev->descriptor.idProduct,
2294                         ifnum,
2295                         interface->altsetting[0].desc.bInterfaceClass);
2296
2297         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2298
2299         /* check if the device has the iso in endpoint at the correct place */
2300         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2301             USB_ENDPOINT_XFER_ISOC) {
2302                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2303                 em28xx_devused&=~(1<<nr);
2304                 return -ENODEV;
2305         }
2306         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2307                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2308                 em28xx_devused&=~(1<<nr);
2309                 return -ENODEV;
2310         }
2311
2312         if (nr >= EM28XX_MAXBOARDS) {
2313                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2314                 em28xx_devused&=~(1<<nr);
2315                 return -ENOMEM;
2316         }
2317
2318         /* allocate memory for our device state and initialize it */
2319         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2320         if (dev == NULL) {
2321                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2322                 em28xx_devused&=~(1<<nr);
2323                 return -ENOMEM;
2324         }
2325
2326         snprintf(dev->name, 29, "em28xx #%d", nr);
2327         dev->devno = nr;
2328         dev->model = id->driver_info;
2329         dev->alt   = -1;
2330
2331         /* Checks if audio is provided by some interface */
2332         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2333                 uif = udev->config->interface[i];
2334                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2335                         dev->has_audio_class = 1;
2336                         break;
2337                 }
2338         }
2339
2340         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2341                    dev->has_audio_class ? "Has" : "Doesn't have");
2342
2343         /* compute alternate max packet sizes */
2344         uif = udev->actconfig->interface[0];
2345
2346         dev->num_alt=uif->num_altsetting;
2347         em28xx_info("Alternate settings: %i\n",dev->num_alt);
2348 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2349         dev->alt_max_pkt_size = kmalloc(32*
2350                                                 dev->num_alt,GFP_KERNEL);
2351         if (dev->alt_max_pkt_size == NULL) {
2352                 em28xx_errdev("out of memory!\n");
2353                 em28xx_devused&=~(1<<nr);
2354                 kfree(dev);
2355                 return -ENOMEM;
2356         }
2357
2358         for (i = 0; i < dev->num_alt ; i++) {
2359                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2360                                                         wMaxPacketSize);
2361                 dev->alt_max_pkt_size[i] =
2362                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2363                 em28xx_info("Alternate setting %i, max size= %i\n",i,
2364                                                         dev->alt_max_pkt_size[i]);
2365         }
2366
2367         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2368                 dev->model = card[nr];
2369
2370         /* allocate device struct */
2371         retval = em28xx_init_dev(&dev, udev, nr);
2372         if (retval)
2373                 return retval;
2374
2375         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2376
2377         /* save our data pointer in this interface device */
2378         usb_set_intfdata(interface, dev);
2379
2380 #if defined(CONFIG_VIDEO_EM28XX_DVB) || defined(CONFIG_VIDEO_EM28XX_DVB_MODULE)
2381         dev->qops = kmalloc(sizeof(em28xx_video_qops), GFP_KERNEL);
2382         memcpy(dev->qops, &em28xx_video_qops, sizeof(em28xx_video_qops));
2383 #endif
2384
2385         request_modules(dev);
2386
2387         return 0;
2388 }
2389
2390 /*
2391  * em28xx_usb_disconnect()
2392  * called when the device gets diconencted
2393  * video device will be unregistered on v4l2_close in case it is still open
2394  */
2395 static void em28xx_usb_disconnect(struct usb_interface *interface)
2396 {
2397         struct em28xx *dev;
2398         struct em28xx_ops *ops = NULL;
2399
2400         dev = usb_get_intfdata(interface);
2401         usb_set_intfdata(interface, NULL);
2402
2403         if (!dev)
2404                 return;
2405
2406         em28xx_info("disconnecting %s\n", dev->vdev->name);
2407
2408         /* wait until all current v4l2 io is finished then deallocate resources */
2409         mutex_lock(&dev->lock);
2410
2411         wake_up_interruptible_all(&dev->open);
2412
2413         if (dev->users) {
2414                 em28xx_warn
2415                     ("device /dev/video%d is open! Deregistration and memory "
2416                      "deallocation are deferred on close.\n",
2417                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2418
2419                 dev->state |= DEV_MISCONFIGURED;
2420                 em28xx_uninit_isoc(dev);
2421                 dev->state |= DEV_DISCONNECTED;
2422                 wake_up_interruptible(&dev->wait_frame);
2423                 wake_up_interruptible(&dev->wait_stream);
2424         } else {
2425                 dev->state |= DEV_DISCONNECTED;
2426                 em28xx_release_resources(dev);
2427         }
2428         mutex_unlock(&dev->lock);
2429
2430         mutex_lock(&em28xx_extension_devlist_lock);
2431         if (!list_empty(&em28xx_extension_devlist)) {
2432                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2433                         ops->fini(dev);
2434                 }
2435         }
2436         mutex_unlock(&em28xx_extension_devlist_lock);
2437
2438         if (!dev->users) {
2439                 kfree(dev->alt_max_pkt_size);
2440                 kfree(dev);
2441         }
2442 }
2443
2444 static struct usb_driver em28xx_usb_driver = {
2445         .name = "em28xx",
2446         .probe = em28xx_usb_probe,
2447         .disconnect = em28xx_usb_disconnect,
2448         .id_table = em28xx_id_table,
2449 };
2450
2451 static int __init em28xx_module_init(void)
2452 {
2453         int result;
2454
2455         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2456                (EM28XX_VERSION_CODE >> 16) & 0xff,
2457                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2458 #ifdef SNAPSHOT
2459         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2460                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2461 #endif
2462
2463         /* register this driver with the USB subsystem */
2464         result = usb_register(&em28xx_usb_driver);
2465         if (result)
2466                 em28xx_err(DRIVER_NAME
2467                            " usb_register failed. Error number %d.\n", result);
2468
2469         return result;
2470 }
2471
2472 static void __exit em28xx_module_exit(void)
2473 {
2474         /* deregister this driver with the USB subsystem */
2475         usb_deregister(&em28xx_usb_driver);
2476 }
2477
2478 module_init(em28xx_module_init);
2479 module_exit(em28xx_module_exit);