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@brturbo.com.br>
   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/usb.h>
  32 #include <linux/i2c.h>
  33 #include <linux/version.h>
  34 #include <linux/video_decoder.h>
  35 #include <linux/mutex.h>
  36
  37 #include "em28xx.h"
  38 #include <media/tuner.h>
  39 #include <media/v4l2-common.h>
  40
  41 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  42                       "Markus Rechberger <mrechberger@gmail.com>, " \
  43                       "Mauro Carvalho Chehab <mchehab@brturbo.com.br>, " \
  44                       "Sascha Sommer <saschasommer@freenet.de>"
  45
  46 #define DRIVER_NAME         "em28xx"
  47 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  48 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  49
  50 #define em28xx_videodbg(fmt, arg...) do {\
  51         if (video_debug) \
  52                 printk(KERN_INFO "%s %s :"fmt, \
  53                          dev->name, __FUNCTION__ , ##arg); } while (0)
  54
  55 MODULE_AUTHOR(DRIVER_AUTHOR);
  56 MODULE_DESCRIPTION(DRIVER_DESC);
  57 MODULE_LICENSE("GPL");
  58
  59 static LIST_HEAD(em28xx_devlist);
  60
  61 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  62 module_param_array(card,  int, NULL, 0444);
  63 MODULE_PARM_DESC(card,"card type");
  64
  65 static int tuner = -1;
  66 module_param(tuner, int, 0444);
  67 MODULE_PARM_DESC(tuner, "tuner type");
  68
  69 static unsigned int video_debug = 0;
  70 module_param(video_debug,int,0644);
  71 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  72
  73 /* supported tv norms */
  74 static struct em28xx_tvnorm tvnorms[] = {
  75         {
  76                 .name = "PAL",
  77                 .id = V4L2_STD_PAL,
  78                 .mode = VIDEO_MODE_PAL,
  79          }, {
  80                 .name = "NTSC",
  81                 .id = V4L2_STD_NTSC,
  82                 .mode = VIDEO_MODE_NTSC,
  83         }, {
  84                  .name = "SECAM",
  85                  .id = V4L2_STD_SECAM,
  86                  .mode = VIDEO_MODE_SECAM,
  87         }, {
  88                 .name = "PAL-M",
  89                 .id = V4L2_STD_PAL_M,
  90                 .mode = VIDEO_MODE_PAL,
  91         }
  92 };
  93
  94 static const unsigned char saa7114_i2c_init[] = {
  95         0x00,0x00,0x01,0x08,0x02,0xc4,0x03,0x30,0x04,0x90,0x05,0x90,0x06,0xeb,0x07,0xe0,
  96         0x08,0x88,0x09,0x40,0x0a,0x80,0x0b,0x44,0x0c,0x40,0x0d,0x00,0x0e,0x81,0x0f,0x2a,
  97         0x10,0x06,0x11,0x00,0x12,0xc8,0x13,0x80,0x14,0x00,0x15,0x11,0x16,0x01,0x17,0x42,
  98         0x18,0x40,0x19,0x80,0x40,0x00,0x41,0xff,0x42,0xff,0x43,0xff,0x44,0xff,0x45,0xff,
  99         0x46,0xff,0x47,0xff,0x48,0xff,0x49,0xff,0x4a,0xff,0x4b,0xff,0x4c,0xff,0x4d,0xff,
 100         0x4e,0xff,0x4f,0xff,0x50,0xff,0x51,0xff,0x52,0xff,0x53,0xff,0x54,0x5f,0x55,0xff,
 101         0x56,0xff,0x57,0xff,0x58,0x00,0x59,0x47,0x5a,0x03,0x5b,0x03,0x5d,0x3e,0x5e,0x00,
 102         0x80,0x1c,0x83,0x01,0x84,0xa5,0x85,0x10,0x86,0x45,0x87,0x41,0x88,0xf0,0x88,0x00,
 103         0x88,0xf0,0x90,0x00,0x91,0x08,0x92,0x00,0x93,0x80,0x94,0x08,0x95,0x00,0x96,0xc0,
 104         0x97,0x02,0x98,0x13,0x99,0x00,0x9a,0x38,0x9b,0x01,0x9c,0x80,0x9d,0x02,0x9e,0x06,
 105         0x9f,0x01,0xa0,0x01,0xa1,0x00,0xa2,0x00,0xa4,0x80,0xa5,0x36,0xa6,0x36,0xa8,0x67,
 106         0xa9,0x04,0xaa,0x00,0xac,0x33,0xad,0x02,0xae,0x00,0xb0,0xcd,0xb1,0x04,0xb2,0xcd,
 107         0xb3,0x04,0xb4,0x01,0xb8,0x00,0xb9,0x00,0xba,0x00,0xbb,0x00,0xbc,0x00,0xbd,0x00,
 108         0xbe,0x00,0xbf,0x00
 109 };
 110
 111 #define TVNORMS ARRAY_SIZE(tvnorms)
 112
 113 /* supported controls */
 114 /* Common to all boards */
 115 static struct v4l2_queryctrl em28xx_qctrl[] = {
 116         {
 117                 .id = V4L2_CID_AUDIO_VOLUME,
 118                 .type = V4L2_CTRL_TYPE_INTEGER,
 119                 .name = "Volume",
 120                 .minimum = 0x0,
 121                 .maximum = 0x1f,
 122                 .step = 0x1,
 123                 .default_value = 0x1f,
 124                 .flags = 0,
 125         },{
 126                 .id = V4L2_CID_AUDIO_MUTE,
 127                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 128                 .name = "Mute",
 129                 .minimum = 0,
 130                 .maximum = 1,
 131                 .step = 1,
 132                 .default_value = 1,
 133                 .flags = 0,
 134         }
 135 };
 136
 137 /* FIXME: These are specific to saa711x - should be moved to its code */
 138 static struct v4l2_queryctrl saa711x_qctrl[] = {
 139         {
 140                 .id = V4L2_CID_BRIGHTNESS,
 141                 .type = V4L2_CTRL_TYPE_INTEGER,
 142                 .name = "Brightness",
 143                 .minimum = -128,
 144                 .maximum = 127,
 145                 .step = 1,
 146                 .default_value = 0,
 147                 .flags = 0,
 148         },{
 149                 .id = V4L2_CID_CONTRAST,
 150                 .type = V4L2_CTRL_TYPE_INTEGER,
 151                 .name = "Contrast",
 152                 .minimum = 0x0,
 153                 .maximum = 0x1f,
 154                 .step = 0x1,
 155                 .default_value = 0x10,
 156                 .flags = 0,
 157         },{
 158                 .id = V4L2_CID_SATURATION,
 159                 .type = V4L2_CTRL_TYPE_INTEGER,
 160                 .name = "Saturation",
 161                 .minimum = 0x0,
 162                 .maximum = 0x1f,
 163                 .step = 0x1,
 164                 .default_value = 0x10,
 165                 .flags = 0,
 166         },{
 167                 .id = V4L2_CID_RED_BALANCE,
 168                 .type = V4L2_CTRL_TYPE_INTEGER,
 169                 .name = "Red chroma balance",
 170                 .minimum = -128,
 171                 .maximum = 127,
 172                 .step = 1,
 173                 .default_value = 0,
 174                 .flags = 0,
 175         },{
 176                 .id = V4L2_CID_BLUE_BALANCE,
 177                 .type = V4L2_CTRL_TYPE_INTEGER,
 178                 .name = "Blue chroma balance",
 179                 .minimum = -128,
 180                 .maximum = 127,
 181                 .step = 1,
 182                 .default_value = 0,
 183                 .flags = 0,
 184         },{
 185                 .id = V4L2_CID_GAMMA,
 186                 .type = V4L2_CTRL_TYPE_INTEGER,
 187                 .name = "Gamma",
 188                 .minimum = 0x0,
 189                 .maximum = 0x3f,
 190                 .step = 0x1,
 191                 .default_value = 0x20,
 192                 .flags = 0,
 193         }
 194 };
 195
 196 static struct usb_driver em28xx_usb_driver;
 197
 198 static DEFINE_MUTEX(em28xx_sysfs_lock);
 199 static DECLARE_RWSEM(em28xx_disconnect);
 200
 201 /*********************  v4l2 interface  ******************************************/
 202
 203 /*
 204  * em28xx_config()
 205  * inits registers with sane defaults
 206  */
 207 static int em28xx_config(struct em28xx *dev)
 208 {
 209
 210         /* Sets I2C speed to 100 KHz */
 211         em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 212
 213         /* enable vbi capturing */
 214         em28xx_audio_usb_mute(dev, 1);
 215         dev->mute = 1;          /* maybe not the right place... */
 216         dev->volume = 0x1f;
 217         em28xx_audio_analog_set(dev);
 218         em28xx_audio_analog_setup(dev);
 219         em28xx_outfmt_set_yuv422(dev);
 220         em28xx_colorlevels_set_default(dev);
 221         em28xx_compression_disable(dev);
 222
 223         return 0;
 224 }
 225
 226 /*
 227  * em28xx_config_i2c()
 228  * configure i2c attached devices
 229  */
 230 static void em28xx_config_i2c(struct em28xx *dev)
 231 {
 232         struct v4l2_frequency f;
 233         struct video_decoder_init em28xx_vdi = {.data = NULL };
 234
 235
 236         /* configure decoder */
 237         if(dev->model == EM2820_BOARD_MSI_VOX_USB_2){
 238                 em28xx_vdi.data=saa7114_i2c_init;
 239                 em28xx_vdi.len=sizeof(saa7114_i2c_init);
 240         }
 241
 242
 243         em28xx_i2c_call_clients(dev, DECODER_INIT, &em28xx_vdi);
 244         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
 245 /*      em28xx_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
 246 /*      em28xx_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
 247 /*      em28xx_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
 248 /*      em28xx_i2c_call_clients(dev,DECODER_DUMP, NULL); */
 249
 250         /* configure tuner */
 251         f.tuner = 0;
 252         f.type = V4L2_TUNER_ANALOG_TV;
 253         f.frequency = 9076;     /* FIXME:remove magic number */
 254         dev->ctl_freq = f.frequency;
 255         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 256
 257         /* configure tda9887 */
 258
 259
 260 /*      em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
 261 }
 262
 263 /*
 264  * em28xx_empty_framequeues()
 265  * prepare queues for incoming and outgoing frames
 266  */
 267 static void em28xx_empty_framequeues(struct em28xx *dev)
 268 {
 269         u32 i;
 270
 271         INIT_LIST_HEAD(&dev->inqueue);
 272         INIT_LIST_HEAD(&dev->outqueue);
 273
 274         for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
 275                 dev->frame[i].state = F_UNUSED;
 276                 dev->frame[i].buf.bytesused = 0;
 277         }
 278 }
 279
 280 static void video_mux(struct em28xx *dev, int index)
 281 {
 282         int input, ainput;
 283
 284         input = INPUT(index)->vmux;
 285         dev->ctl_input = index;
 286         dev->ctl_ainput = INPUT(index)->amux;
 287
 288         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
 289
 290
 291         em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
 292
 293         if (dev->has_msp34xx) {
 294                 if (dev->i2s_speed)
 295                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 296                 em28xx_i2c_call_clients(dev, VIDIOC_S_AUDIO, &dev->ctl_ainput);
 297                 ainput = EM28XX_AUDIO_SRC_TUNER;
 298                 em28xx_audio_source(dev, ainput);
 299         } else {
 300                 switch (dev->ctl_ainput) {
 301                 case 0:
 302                         ainput = EM28XX_AUDIO_SRC_TUNER;
 303                         break;
 304                 default:
 305                         ainput = EM28XX_AUDIO_SRC_LINE;
 306                 }
 307                 em28xx_audio_source(dev, ainput);
 308         }
 309 }
 310
 311 /*
 312  * em28xx_v4l2_open()
 313  * inits the device and starts isoc transfer
 314  */
 315 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 316 {
 317         int minor = iminor(inode);
 318         int errCode = 0;
 319         struct em28xx *h,*dev = NULL;
 320         struct list_head *list;
 321
 322         list_for_each(list,&em28xx_devlist) {
 323                 h = list_entry(list, struct em28xx, devlist);
 324                 if (h->vdev->minor == minor) {
 325                         dev  = h;
 326                 }
 327         }
 328
 329         filp->private_data=dev;
 330
 331
 332         em28xx_videodbg("users=%d\n", dev->users);
 333
 334         if (!down_read_trylock(&em28xx_disconnect))
 335                 return -ERESTARTSYS;
 336
 337         if (dev->users) {
 338                 em28xx_warn("this driver can be opened only once\n");
 339                 up_read(&em28xx_disconnect);
 340                 return -EBUSY;
 341         }
 342
 343 /*      if(dev->vbi_dev->minor == minor){
 344                 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
 345         }*/
 346         if (dev->vdev->minor == minor) {
 347                 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 348         }
 349
 350         init_MUTEX(&dev->fileop_lock);  /* to 1 == available */
 351         spin_lock_init(&dev->queue_lock);
 352         init_waitqueue_head(&dev->wait_frame);
 353         init_waitqueue_head(&dev->wait_stream);
 354
 355         down(&dev->lock);
 356
 357         em28xx_set_alternate(dev);
 358
 359         dev->width = norm_maxw(dev);
 360         dev->height = norm_maxh(dev);
 361         dev->frame_size = dev->width * dev->height * 2;
 362         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 363         dev->bytesperline = dev->width * 2;
 364         dev->hscale = 0;
 365         dev->vscale = 0;
 366
 367         em28xx_capture_start(dev, 1);
 368         em28xx_resolution_set(dev);
 369
 370         /* device needs to be initialized before isoc transfer */
 371         video_mux(dev, 0);
 372
 373         /* start the transfer */
 374         errCode = em28xx_init_isoc(dev);
 375         if (errCode)
 376                 goto err;
 377
 378         dev->users++;
 379         filp->private_data = dev;
 380         dev->io = IO_NONE;
 381         dev->stream = STREAM_OFF;
 382         dev->num_frames = 0;
 383
 384         /* prepare queues */
 385         em28xx_empty_framequeues(dev);
 386
 387         dev->state |= DEV_INITIALIZED;
 388
 389         video_mux(dev, 0);
 390
 391       err:
 392         up(&dev->lock);
 393         up_read(&em28xx_disconnect);
 394         return errCode;
 395 }
 396
 397 /*
 398  * em28xx_realease_resources()
 399  * unregisters the v4l2,i2c and usb devices
 400  * called when the device gets disconected or at module unload
 401 */
 402 static void em28xx_release_resources(struct em28xx *dev)
 403 {
 404         mutex_lock(&em28xx_sysfs_lock);
 405
 406         em28xx_info("V4L2 device /dev/video%d deregistered\n",
 407                     dev->vdev->minor);
 408         list_del(&dev->devlist);
 409         video_unregister_device(dev->vdev);
 410 /*      video_unregister_device(dev->vbi_dev); */
 411         em28xx_i2c_unregister(dev);
 412         usb_put_dev(dev->udev);
 413         mutex_unlock(&em28xx_sysfs_lock);
 414 }
 415
 416 /*
 417  * em28xx_v4l2_close()
 418  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 419  */
 420 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 421 {
 422         int errCode;
 423         struct em28xx *dev=filp->private_data;
 424
 425         em28xx_videodbg("users=%d\n", dev->users);
 426
 427         down(&dev->lock);
 428
 429         em28xx_uninit_isoc(dev);
 430
 431         em28xx_release_buffers(dev);
 432
 433         /* the device is already disconnect, free the remaining resources */
 434         if (dev->state & DEV_DISCONNECTED) {
 435                 em28xx_release_resources(dev);
 436                 up(&dev->lock);
 437                 kfree(dev);
 438                 return 0;
 439         }
 440
 441         /* set alternate 0 */
 442         dev->alt = 0;
 443         em28xx_videodbg("setting alternate 0\n");
 444         errCode = usb_set_interface(dev->udev, 0, 0);
 445         if (errCode < 0) {
 446                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 447                      errCode);
 448         }
 449
 450         dev->users--;
 451         wake_up_interruptible_nr(&dev->open, 1);
 452         up(&dev->lock);
 453         return 0;
 454 }
 455
 456 /*
 457  * em28xx_v4l2_read()
 458  * will allocate buffers when called for the first time
 459  */
 460 static ssize_t
 461 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 462                  loff_t * f_pos)
 463 {
 464         struct em28xx_frame_t *f, *i;
 465         unsigned long lock_flags;
 466         int ret = 0;
 467         struct em28xx *dev = filp->private_data;
 468
 469         if (down_interruptible(&dev->fileop_lock))
 470                 return -ERESTARTSYS;
 471
 472         if (dev->state & DEV_DISCONNECTED) {
 473                 em28xx_videodbg("device not present\n");
 474                 up(&dev->fileop_lock);
 475                 return -ENODEV;
 476         }
 477
 478         if (dev->state & DEV_MISCONFIGURED) {
 479                 em28xx_videodbg("device misconfigured; close and open it again\n");
 480                 up(&dev->fileop_lock);
 481                 return -EIO;
 482         }
 483
 484         if (dev->io == IO_MMAP) {
 485                 em28xx_videodbg ("IO method is set to mmap; close and open"
 486                                 " the device again to choose the read method\n");
 487                 up(&dev->fileop_lock);
 488                 return -EINVAL;
 489         }
 490
 491         if (dev->io == IO_NONE) {
 492                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 493                         em28xx_errdev("read failed, not enough memory\n");
 494                         up(&dev->fileop_lock);
 495                         return -ENOMEM;
 496                 }
 497                 dev->io = IO_READ;
 498                 dev->stream = STREAM_ON;
 499                 em28xx_queue_unusedframes(dev);
 500         }
 501
 502         if (!count) {
 503                 up(&dev->fileop_lock);
 504                 return 0;
 505         }
 506
 507         if (list_empty(&dev->outqueue)) {
 508                 if (filp->f_flags & O_NONBLOCK) {
 509                         up(&dev->fileop_lock);
 510                         return -EAGAIN;
 511                 }
 512                 ret = wait_event_interruptible
 513                     (dev->wait_frame,
 514                      (!list_empty(&dev->outqueue)) ||
 515                      (dev->state & DEV_DISCONNECTED));
 516                 if (ret) {
 517                         up(&dev->fileop_lock);
 518                         return ret;
 519                 }
 520                 if (dev->state & DEV_DISCONNECTED) {
 521                         up(&dev->fileop_lock);
 522                         return -ENODEV;
 523                 }
 524         }
 525
 526         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 527
 528         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 529         list_for_each_entry(i, &dev->outqueue, frame)
 530             i->state = F_UNUSED;
 531         INIT_LIST_HEAD(&dev->outqueue);
 532         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 533
 534         em28xx_queue_unusedframes(dev);
 535
 536         if (count > f->buf.length)
 537                 count = f->buf.length;
 538
 539         if (copy_to_user(buf, f->bufmem, count)) {
 540                 up(&dev->fileop_lock);
 541                 return -EFAULT;
 542         }
 543         *f_pos += count;
 544
 545         up(&dev->fileop_lock);
 546
 547         return count;
 548 }
 549
 550 /*
 551  * em28xx_v4l2_poll()
 552  * will allocate buffers when called for the first time
 553  */
 554 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 555 {
 556         unsigned int mask = 0;
 557         struct em28xx *dev = filp->private_data;
 558
 559         if (down_interruptible(&dev->fileop_lock))
 560                 return POLLERR;
 561
 562         if (dev->state & DEV_DISCONNECTED) {
 563                 em28xx_videodbg("device not present\n");
 564         } else if (dev->state & DEV_MISCONFIGURED) {
 565                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 566         } else {
 567                 if (dev->io == IO_NONE) {
 568                         if (!em28xx_request_buffers
 569                             (dev, EM28XX_NUM_READ_FRAMES)) {
 570                                 em28xx_warn
 571                                     ("poll() failed, not enough memory\n");
 572                         } else {
 573                                 dev->io = IO_READ;
 574                                 dev->stream = STREAM_ON;
 575                         }
 576                 }
 577
 578                 if (dev->io == IO_READ) {
 579                         em28xx_queue_unusedframes(dev);
 580                         poll_wait(filp, &dev->wait_frame, wait);
 581
 582                         if (!list_empty(&dev->outqueue))
 583                                 mask |= POLLIN | POLLRDNORM;
 584
 585                         up(&dev->fileop_lock);
 586
 587                         return mask;
 588                 }
 589         }
 590
 591         up(&dev->fileop_lock);
 592         return POLLERR;
 593 }
 594
 595 /*
 596  * em28xx_vm_open()
 597  */
 598 static void em28xx_vm_open(struct vm_area_struct *vma)
 599 {
 600         struct em28xx_frame_t *f = vma->vm_private_data;
 601         f->vma_use_count++;
 602 }
 603
 604 /*
 605  * em28xx_vm_close()
 606  */
 607 static void em28xx_vm_close(struct vm_area_struct *vma)
 608 {
 609         /* NOTE: buffers are not freed here */
 610         struct em28xx_frame_t *f = vma->vm_private_data;
 611         f->vma_use_count--;
 612 }
 613
 614 static struct vm_operations_struct em28xx_vm_ops = {
 615         .open = em28xx_vm_open,
 616         .close = em28xx_vm_close,
 617 };
 618
 619 /*
 620  * em28xx_v4l2_mmap()
 621  */
 622 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 623 {
 624         unsigned long size = vma->vm_end - vma->vm_start,
 625             start = vma->vm_start;
 626         void *pos;
 627         u32 i;
 628
 629         struct em28xx *dev = filp->private_data;
 630
 631         if (down_interruptible(&dev->fileop_lock))
 632                 return -ERESTARTSYS;
 633
 634         if (dev->state & DEV_DISCONNECTED) {
 635                 em28xx_videodbg("mmap: device not present\n");
 636                 up(&dev->fileop_lock);
 637                 return -ENODEV;
 638         }
 639
 640         if (dev->state & DEV_MISCONFIGURED) {
 641                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 642                                                 "open it again\n");
 643                 up(&dev->fileop_lock);
 644                 return -EIO;
 645         }
 646
 647         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 648             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 649                 up(&dev->fileop_lock);
 650                 return -EINVAL;
 651         }
 652
 653         for (i = 0; i < dev->num_frames; i++) {
 654                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 655                         break;
 656         }
 657         if (i == dev->num_frames) {
 658                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 659                 up(&dev->fileop_lock);
 660                 return -EINVAL;
 661         }
 662
 663         /* VM_IO is eventually going to replace PageReserved altogether */
 664         vma->vm_flags |= VM_IO;
 665         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 666
 667         pos = dev->frame[i].bufmem;
 668         while (size > 0) {      /* size is page-aligned */
 669                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 670                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 671                         up(&dev->fileop_lock);
 672                         return -EAGAIN;
 673                 }
 674                 start += PAGE_SIZE;
 675                 pos += PAGE_SIZE;
 676                 size -= PAGE_SIZE;
 677         }
 678
 679         vma->vm_ops = &em28xx_vm_ops;
 680         vma->vm_private_data = &dev->frame[i];
 681
 682         em28xx_vm_open(vma);
 683         up(&dev->fileop_lock);
 684         return 0;
 685 }
 686
 687 /*
 688  * em28xx_get_ctrl()
 689  * return the current saturation, brightness or contrast, mute state
 690  */
 691 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 692 {
 693         switch (ctrl->id) {
 694         case V4L2_CID_AUDIO_MUTE:
 695                 ctrl->value = dev->mute;
 696                 return 0;
 697         case V4L2_CID_AUDIO_VOLUME:
 698                 ctrl->value = dev->volume;
 699                 return 0;
 700         default:
 701                 return -EINVAL;
 702         }
 703 }
 704
 705 /*FIXME: should be moved to saa711x */
 706 static int saa711x_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 707 {
 708         s32 tmp;
 709         switch (ctrl->id) {
 710         case V4L2_CID_BRIGHTNESS:
 711                 if ((tmp = em28xx_brightness_get(dev)) < 0)
 712                         return -EIO;
 713                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 714                 return 0;
 715         case V4L2_CID_CONTRAST:
 716                 if ((ctrl->value = em28xx_contrast_get(dev)) < 0)
 717                         return -EIO;
 718                 return 0;
 719         case V4L2_CID_SATURATION:
 720                 if ((ctrl->value = em28xx_saturation_get(dev)) < 0)
 721                         return -EIO;
 722                 return 0;
 723         case V4L2_CID_RED_BALANCE:
 724                 if ((tmp = em28xx_v_balance_get(dev)) < 0)
 725                         return -EIO;
 726                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 727                 return 0;
 728         case V4L2_CID_BLUE_BALANCE:
 729                 if ((tmp = em28xx_u_balance_get(dev)) < 0)
 730                         return -EIO;
 731                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 732                 return 0;
 733         case V4L2_CID_GAMMA:
 734                 if ((ctrl->value = em28xx_gamma_get(dev)) < 0)
 735                         return -EIO;
 736                 return 0;
 737         default:
 738                 return -EINVAL;
 739         }
 740 }
 741
 742 /*
 743  * em28xx_set_ctrl()
 744  * mute or set new saturation, brightness or contrast
 745  */
 746 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 747 {
 748         switch (ctrl->id) {
 749         case V4L2_CID_AUDIO_MUTE:
 750                 if (ctrl->value != dev->mute) {
 751                         dev->mute = ctrl->value;
 752                         em28xx_audio_usb_mute(dev, ctrl->value);
 753                         return em28xx_audio_analog_set(dev);
 754                 }
 755                 return 0;
 756         case V4L2_CID_AUDIO_VOLUME:
 757                 dev->volume = ctrl->value;
 758                 return em28xx_audio_analog_set(dev);
 759         default:
 760                 return -EINVAL;
 761         }
 762 }
 763
 764 /*FIXME: should be moved to saa711x */
 765 static int saa711x_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 766 {
 767         switch (ctrl->id) {
 768         case V4L2_CID_BRIGHTNESS:
 769                 return em28xx_brightness_set(dev, ctrl->value);
 770         case V4L2_CID_CONTRAST:
 771                 return em28xx_contrast_set(dev, ctrl->value);
 772         case V4L2_CID_SATURATION:
 773                 return em28xx_saturation_set(dev, ctrl->value);
 774         case V4L2_CID_RED_BALANCE:
 775                 return em28xx_v_balance_set(dev, ctrl->value);
 776         case V4L2_CID_BLUE_BALANCE:
 777                 return em28xx_u_balance_set(dev, ctrl->value);
 778         case V4L2_CID_GAMMA:
 779                 return em28xx_gamma_set(dev, ctrl->value);
 780         default:
 781                 return -EINVAL;
 782         }
 783 }
 784
 785 /*
 786  * em28xx_stream_interrupt()
 787  * stops streaming
 788  */
 789 static int em28xx_stream_interrupt(struct em28xx *dev)
 790 {
 791         int ret = 0;
 792
 793         /* stop reading from the device */
 794
 795         dev->stream = STREAM_INTERRUPT;
 796         ret = wait_event_timeout(dev->wait_stream,
 797                                  (dev->stream == STREAM_OFF) ||
 798                                  (dev->state & DEV_DISCONNECTED),
 799                                  EM28XX_URB_TIMEOUT);
 800         if (dev->state & DEV_DISCONNECTED)
 801                 return -ENODEV;
 802         else if (ret) {
 803                 dev->state |= DEV_MISCONFIGURED;
 804                 em28xx_videodbg("device is misconfigured; close and "
 805                         "open /dev/video%d again\n", dev->vdev->minor);
 806                 return ret;
 807         }
 808
 809         return 0;
 810 }
 811
 812 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 813 {
 814         unsigned int hscale, vscale;
 815         unsigned int maxh, maxw;
 816
 817         maxw = norm_maxw(dev);
 818         maxh = norm_maxh(dev);
 819
 820         /* width must even because of the YUYV format */
 821         /* height must be even because of interlacing */
 822         height &= 0xfffe;
 823         width &= 0xfffe;
 824
 825         if (height < 32)
 826                 height = 32;
 827         if (height > maxh)
 828                 height = maxh;
 829         if (width < 48)
 830                 width = 48;
 831         if (width > maxw)
 832                 width = maxw;
 833
 834         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 835                 hscale = 0x3fff;
 836         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 837
 838         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 839                 vscale = 0x3fff;
 840         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 841
 842         /* set new image size */
 843         dev->width = width;
 844         dev->height = height;
 845         dev->frame_size = dev->width * dev->height * 2;
 846         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 847         dev->bytesperline = dev->width * 2;
 848         dev->hscale = hscale;
 849         dev->vscale = vscale;
 850
 851         em28xx_resolution_set(dev);
 852
 853         return 0;
 854 }
 855
 856 /*
 857  * em28xx_v4l2_do_ioctl()
 858  * This function is _not_ called directly, but from
 859  * em28xx_v4l2_ioctl. Userspace
 860  * copying is done already, arg is a kernel pointer.
 861  */
 862 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 863                            struct em28xx *dev, unsigned int cmd, void *arg,
 864                            v4l2_kioctl driver_ioctl)
 865 {
 866         int ret;
 867
 868         switch (cmd) {
 869                 /* ---------- tv norms ---------- */
 870         case VIDIOC_ENUMSTD:
 871                 {
 872                         struct v4l2_standard *e = arg;
 873                         unsigned int i;
 874
 875                         i = e->index;
 876                         if (i >= TVNORMS)
 877                                 return -EINVAL;
 878                         ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 879                                                        tvnorms[e->index].name);
 880                         e->index = i;
 881                         if (ret < 0)
 882                                 return ret;
 883                         return 0;
 884                 }
 885         case VIDIOC_G_STD:
 886                 {
 887                         v4l2_std_id *id = arg;
 888
 889                         *id = dev->tvnorm->id;
 890                         return 0;
 891                 }
 892         case VIDIOC_S_STD:
 893                 {
 894                         v4l2_std_id *id = arg;
 895                         unsigned int i;
 896
 897                         for (i = 0; i < TVNORMS; i++)
 898                                 if (*id == tvnorms[i].id)
 899                                         break;
 900                         if (i == TVNORMS)
 901                                 for (i = 0; i < TVNORMS; i++)
 902                                         if (*id & tvnorms[i].id)
 903                                                 break;
 904                         if (i == TVNORMS)
 905                                 return -EINVAL;
 906
 907                         down(&dev->lock);
 908                         dev->tvnorm = &tvnorms[i];
 909
 910                         em28xx_set_norm(dev, dev->width, dev->height);
 911
 912 /*
 913                 dev->width=norm_maxw(dev);
 914                 dev->height=norm_maxh(dev);
 915                 dev->frame_size=dev->width*dev->height*2;
 916                 dev->field_size=dev->frame_size>>1;
 917                 dev->bytesperline=dev->width*2;
 918                 dev->hscale=0;
 919                 dev->vscale=0;
 920
 921                 em28xx_resolution_set(dev);
 922 */
 923 /*
 924                 em28xx_uninit_isoc(dev);
 925                 em28xx_set_alternate(dev);
 926                 em28xx_capture_start(dev, 1);
 927                 em28xx_resolution_set(dev);
 928                 em28xx_init_isoc(dev);
 929 */
 930                         em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
 931                                                 &tvnorms[i].mode);
 932                         em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
 933                                                 &dev->tvnorm->id);
 934
 935                         up(&dev->lock);
 936
 937                         return 0;
 938                 }
 939
 940                 /* ------ input switching ---------- */
 941         case VIDIOC_ENUMINPUT:
 942                 {
 943                         struct v4l2_input *i = arg;
 944                         unsigned int n;
 945                         static const char *iname[] = {
 946                                 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 947                                 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 948                                 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 949                                 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 950                                 [EM28XX_VMUX_SVIDEO] = "S-Video",
 951                                 [EM28XX_VMUX_TELEVISION] = "Television",
 952                                 [EM28XX_VMUX_CABLE] = "Cable TV",
 953                                 [EM28XX_VMUX_DVB] = "DVB",
 954                                 [EM28XX_VMUX_DEBUG] = "for debug only",
 955                         };
 956
 957                         n = i->index;
 958                         if (n >= MAX_EM28XX_INPUT)
 959                                 return -EINVAL;
 960                         if (0 == INPUT(n)->type)
 961                                 return -EINVAL;
 962                         memset(i, 0, sizeof(*i));
 963                         i->index = n;
 964                         i->type = V4L2_INPUT_TYPE_CAMERA;
 965                         strcpy(i->name, iname[INPUT(n)->type]);
 966                         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 967                             (EM28XX_VMUX_CABLE == INPUT(n)->type))
 968                                 i->type = V4L2_INPUT_TYPE_TUNER;
 969                         for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
 970                                 i->std |= tvnorms[n].id;
 971                         return 0;
 972                 }
 973
 974         case VIDIOC_G_INPUT:
 975                 {
 976                         int *i = arg;
 977                         *i = dev->ctl_input;
 978
 979                         return 0;
 980                 }
 981
 982         case VIDIOC_S_INPUT:
 983                 {
 984                         int *index = arg;
 985
 986                         if (*index >= MAX_EM28XX_INPUT)
 987                                 return -EINVAL;
 988                         if (0 == INPUT(*index)->type)
 989                                 return -EINVAL;
 990
 991                         down(&dev->lock);
 992                         video_mux(dev, *index);
 993                         up(&dev->lock);
 994
 995                         return 0;
 996                 }
 997
 998         case VIDIOC_G_AUDIO:
 999                 {
1000                         struct v4l2_audio *a = arg;
1001                         unsigned int index = a->index;
1002
1003                         if (a->index > 1)
1004                                 return -EINVAL;
1005                         memset(a, 0, sizeof(*a));
1006                         index = dev->ctl_ainput;
1007
1008                         if (index == 0) {
1009                                 strcpy(a->name, "Television");
1010                         } else {
1011                                 strcpy(a->name, "Line In");
1012                         }
1013                         a->capability = V4L2_AUDCAP_STEREO;
1014                         a->index = index;
1015                         return 0;
1016                 }
1017
1018         case VIDIOC_S_AUDIO:
1019                 {
1020                         struct v4l2_audio *a = arg;
1021                         if (a->index != dev->ctl_ainput)
1022                                 return -EINVAL;
1023
1024                         return 0;
1025                 }
1026
1027                 /* --- controls ---------------------------------------------- */
1028         case VIDIOC_QUERYCTRL:
1029                 {
1030                         struct v4l2_queryctrl *qc = arg;
1031                         int i, id=qc->id;
1032
1033                         memset(qc,0,sizeof(*qc));
1034                         qc->id=id;
1035
1036                         if (!dev->has_msp34xx) {
1037                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1038                                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1039                                                 memcpy(qc, &(em28xx_qctrl[i]),
1040                                                 sizeof(*qc));
1041                                                 return 0;
1042                                         }
1043                                 }
1044                         }
1045                         if (dev->decoder == EM28XX_TVP5150) {
1046                                 em28xx_i2c_call_clients(dev,cmd,qc);
1047                                 if (qc->type)
1048                                         return 0;
1049                                 else
1050                                         return -EINVAL;
1051                         }
1052                         for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1053                                 if (qc->id && qc->id == saa711x_qctrl[i].id) {
1054                                         memcpy(qc, &(saa711x_qctrl[i]),
1055                                                sizeof(*qc));
1056                                         return 0;
1057                                 }
1058                         }
1059
1060                         return -EINVAL;
1061                 }
1062
1063         case VIDIOC_G_CTRL:
1064                 {
1065                         struct v4l2_control *ctrl = arg;
1066                         int retval=-EINVAL;
1067
1068                         if (!dev->has_msp34xx)
1069                                 retval=em28xx_get_ctrl(dev, ctrl);
1070                         if (retval==-EINVAL) {
1071                                 if (dev->decoder == EM28XX_TVP5150) {
1072                                         em28xx_i2c_call_clients(dev,cmd,arg);
1073                                         return 0;
1074                                 }
1075
1076                                 return saa711x_get_ctrl(dev, ctrl);
1077                         } else return retval;
1078                 }
1079
1080         case VIDIOC_S_CTRL:
1081                 {
1082                         struct v4l2_control *ctrl = arg;
1083                         u8 i;
1084
1085                         if (!dev->has_msp34xx){
1086                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1087                                         if (ctrl->id == em28xx_qctrl[i].id) {
1088                                                 if (ctrl->value <
1089                                                 em28xx_qctrl[i].minimum
1090                                                 || ctrl->value >
1091                                                 em28xx_qctrl[i].maximum)
1092                                                         return -ERANGE;
1093                                                 return em28xx_set_ctrl(dev, ctrl);
1094                                         }
1095                                 }
1096                         }
1097
1098                         if (dev->decoder == EM28XX_TVP5150) {
1099                                 em28xx_i2c_call_clients(dev,cmd,arg);
1100                                 return 0;
1101                         } else if (!dev->has_msp34xx) {
1102                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1103                                         if (ctrl->id == em28xx_qctrl[i].id) {
1104                                                 if (ctrl->value <
1105                                                 em28xx_qctrl[i].minimum
1106                                                 || ctrl->value >
1107                                                 em28xx_qctrl[i].maximum)
1108                                                         return -ERANGE;
1109                                                 return em28xx_set_ctrl(dev, ctrl);
1110                                         }
1111                                 }
1112                                 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1113                                         if (ctrl->id == saa711x_qctrl[i].id) {
1114                                                 if (ctrl->value <
1115                                                 saa711x_qctrl[i].minimum
1116                                                 || ctrl->value >
1117                                                 saa711x_qctrl[i].maximum)
1118                                                         return -ERANGE;
1119                                                 return saa711x_set_ctrl(dev, ctrl);
1120                                         }
1121                                 }
1122                         }
1123
1124                         return -EINVAL;
1125                 }
1126
1127                 /* --- tuner ioctls ------------------------------------------ */
1128         case VIDIOC_G_TUNER:
1129                 {
1130                         struct v4l2_tuner *t = arg;
1131                         int status = 0;
1132
1133                         if (0 != t->index)
1134                                 return -EINVAL;
1135
1136                         memset(t, 0, sizeof(*t));
1137                         strcpy(t->name, "Tuner");
1138                         t->type = V4L2_TUNER_ANALOG_TV;
1139                         t->capability = V4L2_TUNER_CAP_NORM;
1140                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1141 /*              t->signal = 0xffff;*/
1142 /*              em28xx_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1143                         /* No way to get signal strength? */
1144                         down(&dev->lock);
1145                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1146                                                 &status);
1147                         up(&dev->lock);
1148                         t->signal =
1149                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1150
1151                         em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1152                                  t->afc);
1153                         return 0;
1154                 }
1155         case VIDIOC_S_TUNER:
1156                 {
1157                         struct v4l2_tuner *t = arg;
1158                         int status = 0;
1159
1160                         if (0 != t->index)
1161                                 return -EINVAL;
1162                         memset(t, 0, sizeof(*t));
1163                         strcpy(t->name, "Tuner");
1164                         t->type = V4L2_TUNER_ANALOG_TV;
1165                         t->capability = V4L2_TUNER_CAP_NORM;
1166                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1167 /*              t->signal = 0xffff; */
1168                         /* No way to get signal strength? */
1169                         down(&dev->lock);
1170                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1171                                                 &status);
1172                         up(&dev->lock);
1173                         t->signal =
1174                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1175
1176                         em28xx_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1177                                  t->signal, t->afc);
1178                         return 0;
1179                 }
1180         case VIDIOC_G_FREQUENCY:
1181                 {
1182                         struct v4l2_frequency *f = arg;
1183
1184                         memset(f, 0, sizeof(*f));
1185                         f->type = V4L2_TUNER_ANALOG_TV;
1186                         f->frequency = dev->ctl_freq;
1187
1188                         return 0;
1189                 }
1190         case VIDIOC_S_FREQUENCY:
1191                 {
1192                         struct v4l2_frequency *f = arg;
1193
1194                         if (0 != f->tuner)
1195                                 return -EINVAL;
1196
1197                         if (V4L2_TUNER_ANALOG_TV != f->type)
1198                                 return -EINVAL;
1199
1200                         down(&dev->lock);
1201                         dev->ctl_freq = f->frequency;
1202                         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1203                         up(&dev->lock);
1204                         return 0;
1205                 }
1206
1207         case VIDIOC_CROPCAP:
1208                 {
1209                         struct v4l2_cropcap *cc = arg;
1210
1211                         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1212                                 return -EINVAL;
1213                         cc->bounds.left = 0;
1214                         cc->bounds.top = 0;
1215                         cc->bounds.width = dev->width;
1216                         cc->bounds.height = dev->height;
1217                         cc->defrect = cc->bounds;
1218                         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1219                         cc->pixelaspect.denominator = 59;
1220                         return 0;
1221                 }
1222         case VIDIOC_STREAMON:
1223                 {
1224                         int *type = arg;
1225
1226                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1227                             || dev->io != IO_MMAP)
1228                                 return -EINVAL;
1229
1230                         if (list_empty(&dev->inqueue))
1231                                 return -EINVAL;
1232
1233                         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1234
1235                         em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1236
1237                         return 0;
1238                 }
1239         case VIDIOC_STREAMOFF:
1240                 {
1241                         int *type = arg;
1242                         int ret;
1243
1244                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1245                             || dev->io != IO_MMAP)
1246                                 return -EINVAL;
1247
1248                         if (dev->stream == STREAM_ON) {
1249                                 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1250                                 if ((ret = em28xx_stream_interrupt(dev)))
1251                                         return ret;
1252                         }
1253                         em28xx_empty_framequeues(dev);
1254
1255                         return 0;
1256                 }
1257         default:
1258                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1259                                                   driver_ioctl);
1260         }
1261         return 0;
1262 }
1263
1264 /*
1265  * em28xx_v4l2_do_ioctl()
1266  * This function is _not_ called directly, but from
1267  * em28xx_v4l2_ioctl. Userspace
1268  * copying is done already, arg is a kernel pointer.
1269  */
1270 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1271                                  unsigned int cmd, void *arg)
1272 {
1273         struct em28xx *dev = filp->private_data;
1274
1275         if (!dev)
1276                 return -ENODEV;
1277
1278         if (video_debug > 1)
1279                 v4l_print_ioctl(dev->name,cmd);
1280
1281         switch (cmd) {
1282
1283                 /* --- capabilities ------------------------------------------ */
1284         case VIDIOC_QUERYCAP:
1285                 {
1286                         struct v4l2_capability *cap = arg;
1287
1288                         memset(cap, 0, sizeof(*cap));
1289                         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1290                         strlcpy(cap->card, em28xx_boards[dev->model].name,
1291                                 sizeof(cap->card));
1292                         strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1293                                 sizeof(cap->bus_info));
1294                         cap->version = EM28XX_VERSION_CODE;
1295                         cap->capabilities =
1296                             V4L2_CAP_VIDEO_CAPTURE |
1297                             V4L2_CAP_AUDIO |
1298                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1299                         if (dev->has_tuner)
1300                                 cap->capabilities |= V4L2_CAP_TUNER;
1301                         return 0;
1302                 }
1303
1304                 /* --- capture ioctls ---------------------------------------- */
1305         case VIDIOC_ENUM_FMT:
1306                 {
1307                         struct v4l2_fmtdesc *fmtd = arg;
1308
1309                         if (fmtd->index != 0)
1310                                 return -EINVAL;
1311                         memset(fmtd, 0, sizeof(*fmtd));
1312                         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1313                         strcpy(fmtd->description, "Packed YUY2");
1314                         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1315                         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1316                         return 0;
1317                 }
1318
1319         case VIDIOC_G_FMT:
1320                 {
1321                         struct v4l2_format *format = arg;
1322
1323                         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
1324                                  format->type ==
1325                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1326                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1327                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1328                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1329                                  "not supported");
1330
1331                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1332                                 return -EINVAL;
1333
1334                         format->fmt.pix.width = dev->width;
1335                         format->fmt.pix.height = dev->height;
1336                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1337                         format->fmt.pix.bytesperline = dev->bytesperline;
1338                         format->fmt.pix.sizeimage = dev->frame_size;
1339                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1340                         format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1341
1342                         em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
1343                                  dev->height);
1344                         return 0;
1345                 }
1346
1347         case VIDIOC_TRY_FMT:
1348         case VIDIOC_S_FMT:
1349                 {
1350                         struct v4l2_format *format = arg;
1351                         u32 i;
1352                         int ret = 0;
1353                         int width = format->fmt.pix.width;
1354                         int height = format->fmt.pix.height;
1355                         unsigned int hscale, vscale;
1356                         unsigned int maxh, maxw;
1357
1358                         maxw = norm_maxw(dev);
1359                         maxh = norm_maxh(dev);
1360
1361 /*              int both_fields; */
1362
1363                         em28xx_videodbg("%s: type=%s\n",
1364                                  cmd ==
1365                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1366                                  "VIDIOC_S_FMT",
1367                                  format->type ==
1368                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1369                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1370                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1371                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1372                                  "not supported");
1373
1374                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1375                                 return -EINVAL;
1376
1377                         em28xx_videodbg("%s: requested %dx%d\n",
1378                                  cmd ==
1379                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1380                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1381                                  format->fmt.pix.height);
1382
1383                         /* FIXME: Move some code away from here */
1384                         /* width must even because of the YUYV format */
1385                         /* height must be even because of interlacing */
1386                         height &= 0xfffe;
1387                         width &= 0xfffe;
1388
1389                         if (height < 32)
1390                                 height = 32;
1391                         if (height > maxh)
1392                                 height = maxh;
1393                         if (width < 48)
1394                                 width = 48;
1395                         if (width > maxw)
1396                                 width = maxw;
1397
1398                         if(dev->is_em2800){
1399                                 /* the em2800 can only scale down to 50% */
1400                                 if(height % (maxh / 2))
1401                                         height=maxh;
1402                                 if(width % (maxw / 2))
1403                                         width=maxw;
1404                                 /* according to empiatech support */
1405                                 /* the MaxPacketSize is to small to support */
1406                                 /* framesizes larger than 640x480 @ 30 fps */
1407                                 /* or 640x576 @ 25 fps. As this would cut */
1408                                 /* of a part of the image we prefer */
1409                                 /* 360x576 or 360x480 for now */
1410                                 if(width == maxw && height == maxh)
1411                                         width /= 2;
1412                         }
1413
1414                         if ((hscale =
1415                              (((unsigned long)maxw) << 12) / width - 4096L) >=
1416                             0x4000)
1417                                 hscale = 0x3fff;
1418                         width =
1419                             (((unsigned long)maxw) << 12) / (hscale + 4096L);
1420
1421                         if ((vscale =
1422                              (((unsigned long)maxh) << 12) / height - 4096L) >=
1423                             0x4000)
1424                                 vscale = 0x3fff;
1425                         height =
1426                             (((unsigned long)maxh) << 12) / (vscale + 4096L);
1427
1428                         format->fmt.pix.width = width;
1429                         format->fmt.pix.height = height;
1430                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1431                         format->fmt.pix.bytesperline = width * 2;
1432                         format->fmt.pix.sizeimage = width * 2 * height;
1433                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1434                         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1435
1436                         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
1437                                  cmd ==
1438                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1439                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1440                                  format->fmt.pix.height, hscale, vscale);
1441
1442                         if (cmd == VIDIOC_TRY_FMT)
1443                                 return 0;
1444
1445                         for (i = 0; i < dev->num_frames; i++)
1446                                 if (dev->frame[i].vma_use_count) {
1447                                         em28xx_videodbg("VIDIOC_S_FMT failed. "
1448                                                 "Unmap the buffers first.\n");
1449                                         return -EINVAL;
1450                                 }
1451
1452                         /* stop io in case it is already in progress */
1453                         if (dev->stream == STREAM_ON) {
1454                                 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
1455                                 if ((ret = em28xx_stream_interrupt(dev)))
1456                                         return ret;
1457                         }
1458
1459                         em28xx_release_buffers(dev);
1460                         dev->io = IO_NONE;
1461
1462                         /* set new image size */
1463                         dev->width = width;
1464                         dev->height = height;
1465                         dev->frame_size = dev->width * dev->height * 2;
1466                         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1467                         dev->bytesperline = dev->width * 2;
1468                         dev->hscale = hscale;
1469                         dev->vscale = vscale;
1470 /*                      dev->both_fileds = both_fileds; */
1471                         em28xx_uninit_isoc(dev);
1472                         em28xx_set_alternate(dev);
1473                         em28xx_capture_start(dev, 1);
1474                         em28xx_resolution_set(dev);
1475                         em28xx_init_isoc(dev);
1476
1477                         return 0;
1478                 }
1479
1480                 /* --- streaming capture ------------------------------------- */
1481         case VIDIOC_REQBUFS:
1482                 {
1483                         struct v4l2_requestbuffers *rb = arg;
1484                         u32 i;
1485                         int ret;
1486
1487                         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1488                             rb->memory != V4L2_MEMORY_MMAP)
1489                                 return -EINVAL;
1490
1491                         if (dev->io == IO_READ) {
1492                                 em28xx_videodbg ("method is set to read;"
1493                                         " close and open the device again to"
1494                                         " choose the mmap I/O method\n");
1495                                 return -EINVAL;
1496                         }
1497
1498                         for (i = 0; i < dev->num_frames; i++)
1499                                 if (dev->frame[i].vma_use_count) {
1500                                         em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1501                                         return -EINVAL;
1502                                 }
1503
1504                         if (dev->stream == STREAM_ON) {
1505                                 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1506                                 if ((ret = em28xx_stream_interrupt(dev)))
1507                                         return ret;
1508                         }
1509
1510                         em28xx_empty_framequeues(dev);
1511
1512                         em28xx_release_buffers(dev);
1513                         if (rb->count)
1514                                 rb->count =
1515                                     em28xx_request_buffers(dev, rb->count);
1516
1517                         dev->frame_current = NULL;
1518
1519                         em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1520                                                      rb->count);
1521                         dev->io = rb->count ? IO_MMAP : IO_NONE;
1522                         return 0;
1523                 }
1524
1525         case VIDIOC_QUERYBUF:
1526                 {
1527                         struct v4l2_buffer *b = arg;
1528
1529                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1530                             b->index >= dev->num_frames || dev->io != IO_MMAP)
1531                                 return -EINVAL;
1532
1533                         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1534
1535                         if (dev->frame[b->index].vma_use_count) {
1536                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1537                         }
1538                         if (dev->frame[b->index].state == F_DONE)
1539                                 b->flags |= V4L2_BUF_FLAG_DONE;
1540                         else if (dev->frame[b->index].state != F_UNUSED)
1541                                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1542                         return 0;
1543                 }
1544         case VIDIOC_QBUF:
1545                 {
1546                         struct v4l2_buffer *b = arg;
1547                         unsigned long lock_flags;
1548
1549                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1550                             b->index >= dev->num_frames || dev->io != IO_MMAP) {
1551                                 return -EINVAL;
1552                         }
1553
1554                         if (dev->frame[b->index].state != F_UNUSED) {
1555                                 return -EAGAIN;
1556                         }
1557                         dev->frame[b->index].state = F_QUEUED;
1558
1559                         /* add frame to fifo */
1560                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1561                         list_add_tail(&dev->frame[b->index].frame,
1562                                       &dev->inqueue);
1563                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1564
1565                         return 0;
1566                 }
1567         case VIDIOC_DQBUF:
1568                 {
1569                         struct v4l2_buffer *b = arg;
1570                         struct em28xx_frame_t *f;
1571                         unsigned long lock_flags;
1572                         int ret = 0;
1573
1574                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1575                             || dev->io != IO_MMAP)
1576                                 return -EINVAL;
1577
1578                         if (list_empty(&dev->outqueue)) {
1579                                 if (dev->stream == STREAM_OFF)
1580                                         return -EINVAL;
1581                                 if (filp->f_flags & O_NONBLOCK)
1582                                         return -EAGAIN;
1583                                 ret = wait_event_interruptible
1584                                     (dev->wait_frame,
1585                                      (!list_empty(&dev->outqueue)) ||
1586                                      (dev->state & DEV_DISCONNECTED));
1587                                 if (ret)
1588                                         return ret;
1589                                 if (dev->state & DEV_DISCONNECTED)
1590                                         return -ENODEV;
1591                         }
1592
1593                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1594                         f = list_entry(dev->outqueue.next,
1595                                        struct em28xx_frame_t, frame);
1596                         list_del(dev->outqueue.next);
1597                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1598
1599                         f->state = F_UNUSED;
1600                         memcpy(b, &f->buf, sizeof(*b));
1601
1602                         if (f->vma_use_count)
1603                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1604
1605                         return 0;
1606                 }
1607         default:
1608                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1609                                        em28xx_video_do_ioctl);
1610         }
1611         return 0;
1612 }
1613
1614 /*
1615  * em28xx_v4l2_ioctl()
1616  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1617  */
1618 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1619                              unsigned int cmd, unsigned long arg)
1620 {
1621         int ret = 0;
1622         struct em28xx *dev = filp->private_data;
1623
1624         if (down_interruptible(&dev->fileop_lock))
1625                 return -ERESTARTSYS;
1626
1627         if (dev->state & DEV_DISCONNECTED) {
1628                 em28xx_errdev("v4l2 ioctl: device not present\n");
1629                 up(&dev->fileop_lock);
1630                 return -ENODEV;
1631         }
1632
1633         if (dev->state & DEV_MISCONFIGURED) {
1634                 em28xx_errdev
1635                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1636                 up(&dev->fileop_lock);
1637                 return -EIO;
1638         }
1639
1640         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1641
1642         up(&dev->fileop_lock);
1643
1644         return ret;
1645 }
1646
1647 static struct file_operations em28xx_v4l_fops = {
1648         .owner = THIS_MODULE,
1649         .open = em28xx_v4l2_open,
1650         .release = em28xx_v4l2_close,
1651         .ioctl = em28xx_v4l2_ioctl,
1652         .read = em28xx_v4l2_read,
1653         .poll = em28xx_v4l2_poll,
1654         .mmap = em28xx_v4l2_mmap,
1655         .llseek = no_llseek,
1656         .compat_ioctl   = v4l_compat_ioctl32,
1657
1658 };
1659
1660 /******************************** usb interface *****************************************/
1661
1662 /*
1663  * em28xx_init_dev()
1664  * allocates and inits the device structs, registers i2c bus and v4l device
1665  */
1666 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1667                            int minor, int model)
1668 {
1669         struct em28xx *dev = *devhandle;
1670         int retval = -ENOMEM;
1671         int errCode, i;
1672         unsigned int maxh, maxw;
1673
1674         dev->udev = udev;
1675         dev->model = model;
1676         init_MUTEX(&dev->lock);
1677         init_waitqueue_head(&dev->open);
1678
1679         dev->em28xx_write_regs = em28xx_write_regs;
1680         dev->em28xx_read_reg = em28xx_read_reg;
1681         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1682         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1683         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1684         dev->is_em2800 = em28xx_boards[model].is_em2800;
1685         dev->has_tuner = em28xx_boards[model].has_tuner;
1686         dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1687         dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1688         dev->decoder = em28xx_boards[model].decoder;
1689
1690         if (tuner >= 0)
1691                 dev->tuner_type = tuner;
1692         else
1693                 dev->tuner_type = em28xx_boards[model].tuner_type;
1694
1695         dev->video_inputs = em28xx_boards[model].vchannels;
1696
1697         for (i = 0; i < TVNORMS; i++)
1698                 if (em28xx_boards[model].norm == tvnorms[i].mode)
1699                         break;
1700         if (i == TVNORMS)
1701                 i = 0;
1702
1703         dev->tvnorm = &tvnorms[i];      /* set default norm */
1704
1705         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1706
1707         maxw = norm_maxw(dev);
1708         maxh = norm_maxh(dev);
1709
1710         /* set default image size */
1711         dev->width = maxw;
1712         dev->height = maxh;
1713         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1714         dev->field_size = dev->width * dev->height;
1715         dev->frame_size =
1716             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1717         dev->bytesperline = dev->width * 2;
1718         dev->hscale = 0;
1719         dev->vscale = 0;
1720         dev->ctl_input = 2;
1721
1722         /* setup video picture settings for saa7113h */
1723         memset(&dev->vpic, 0, sizeof(dev->vpic));
1724         dev->vpic.colour = 128 << 8;
1725         dev->vpic.hue = 128 << 8;
1726         dev->vpic.brightness = 128 << 8;
1727         dev->vpic.contrast = 192 << 8;
1728         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1729         dev->vpic.depth = 16;
1730         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1731
1732 #ifdef CONFIG_MODULES
1733         /* request some modules */
1734         if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1735                 request_module("saa711x");
1736         if (dev->decoder == EM28XX_TVP5150)
1737                 request_module("tvp5150");
1738         if (dev->has_tuner)
1739                 request_module("tuner");
1740         if (dev->tda9887_conf)
1741                 request_module("tda9887");
1742 #endif
1743         errCode = em28xx_config(dev);
1744         if (errCode) {
1745                 em28xx_errdev("error configuring device\n");
1746                 kfree(dev);
1747                 return -ENOMEM;
1748         }
1749
1750         down(&dev->lock);
1751         /* register i2c bus */
1752         em28xx_i2c_register(dev);
1753
1754         /* Do board specific init and eeprom reading */
1755         em28xx_card_setup(dev);
1756
1757         /* configure the device */
1758         em28xx_config_i2c(dev);
1759
1760         up(&dev->lock);
1761
1762         errCode = em28xx_config(dev);
1763
1764 #ifdef CONFIG_MODULES
1765         if (dev->has_msp34xx)
1766                 request_module("msp3400");
1767 #endif
1768         /* allocate and fill v4l2 device struct */
1769         dev->vdev = video_device_alloc();
1770         if (NULL == dev->vdev) {
1771                 em28xx_errdev("cannot allocate video_device.\n");
1772                 kfree(dev);
1773                 return -ENOMEM;
1774         }
1775
1776         dev->vdev->type = VID_TYPE_CAPTURE;
1777         if (dev->has_tuner)
1778                 dev->vdev->type |= VID_TYPE_TUNER;
1779         dev->vdev->hardware = 0;
1780         dev->vdev->fops = &em28xx_v4l_fops;
1781         dev->vdev->minor = -1;
1782         dev->vdev->dev = &dev->udev->dev;
1783         dev->vdev->release = video_device_release;
1784         snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1785                  "em28xx video");
1786         list_add_tail(&dev->devlist,&em28xx_devlist);
1787
1788         /* register v4l2 device */
1789         down(&dev->lock);
1790         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1791                 em28xx_errdev("unable to register video device (error=%i).\n",
1792                               retval);
1793                 up(&dev->lock);
1794                 list_del(&dev->devlist);
1795                 video_device_release(dev->vdev);
1796                 kfree(dev);
1797                 return -ENODEV;
1798         }
1799         if (dev->has_msp34xx) {
1800                 /* Send a reset to other chips via gpio */
1801                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1802                 udelay(2500);
1803                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1804                 udelay(2500);
1805
1806         }
1807         video_mux(dev, 0);
1808
1809         up(&dev->lock);
1810
1811         em28xx_info("V4L2 device registered as /dev/video%d\n",
1812                     dev->vdev->minor);
1813
1814         return 0;
1815 }
1816
1817 /*
1818  * em28xx_usb_probe()
1819  * checks for supported devices
1820  */
1821 static int em28xx_usb_probe(struct usb_interface *interface,
1822                             const struct usb_device_id *id)
1823 {
1824         const struct usb_endpoint_descriptor *endpoint;
1825         struct usb_device *udev;
1826         struct usb_interface *uif;
1827         struct em28xx *dev = NULL;
1828         int retval = -ENODEV;
1829         int model,i,nr,ifnum;
1830
1831         udev = usb_get_dev(interface_to_usbdev(interface));
1832         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1833
1834
1835         /* Don't register audio interfaces */
1836         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1837                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1838                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1839                                 ifnum,
1840                                 interface->altsetting[0].desc.bInterfaceClass);
1841                 return -ENODEV;
1842         }
1843
1844         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1845                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1846                         ifnum,
1847                         interface->altsetting[0].desc.bInterfaceClass);
1848
1849         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1850
1851         /* check if the the device has the iso in endpoint at the correct place */
1852         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1853             USB_ENDPOINT_XFER_ISOC) {
1854                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1855                 return -ENODEV;
1856         }
1857         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1858                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1859                 return -ENODEV;
1860         }
1861
1862         model=id->driver_info;
1863         nr=interface->minor;
1864
1865         if (nr>EM28XX_MAXBOARDS) {
1866                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1867                 return -ENOMEM;
1868         }
1869
1870         /* allocate memory for our device state and initialize it */
1871         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1872         if (dev == NULL) {
1873                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1874                 return -ENOMEM;
1875         }
1876
1877         /* compute alternate max packet sizes */
1878         uif = udev->actconfig->interface[0];
1879
1880         dev->num_alt=uif->num_altsetting;
1881         printk(DRIVER_NAME ": Alternate settings: %i\n",dev->num_alt);
1882 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1883         dev->alt_max_pkt_size = kmalloc(32*
1884                                                 dev->num_alt,GFP_KERNEL);
1885         if (dev->alt_max_pkt_size == NULL) {
1886                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1887                 return -ENOMEM;
1888         }
1889
1890         for (i = 0; i < dev->num_alt ; i++) {
1891                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1892                                                         wMaxPacketSize);
1893                 dev->alt_max_pkt_size[i] =
1894                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1895                 printk(DRIVER_NAME ": Alternate setting %i, max size= %i\n",i,
1896                                                         dev->alt_max_pkt_size[i]);
1897         }
1898
1899         snprintf(dev->name, 29, "em28xx #%d", nr);
1900
1901         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1902                 model=card[nr];
1903
1904         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1905                 printk( "%s: Your board has no eeprom inside it and thus can't\n"
1906                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
1907                         "%s: workaround that.  Redirect complaints to the vendor of\n"
1908                         "%s: the TV card.  Best regards,\n"
1909                         "%s:         -- tux\n",
1910                         dev->name,dev->name,dev->name,dev->name,dev->name);
1911                 printk("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1912                         dev->name);
1913                 for (i = 0; i < em28xx_bcount; i++) {
1914                         printk("%s:    card=%d -> %s\n",
1915                                 dev->name, i, em28xx_boards[i].name);
1916                 }
1917         }
1918
1919         /* allocate device struct */
1920         retval = em28xx_init_dev(&dev, udev, nr, model);
1921         if (retval)
1922                 return retval;
1923
1924         em28xx_info("Found %s\n", em28xx_boards[model].name);
1925
1926         /* save our data pointer in this interface device */
1927         usb_set_intfdata(interface, dev);
1928         return 0;
1929 }
1930
1931 /*
1932  * em28xx_usb_disconnect()
1933  * called when the device gets diconencted
1934  * video device will be unregistered on v4l2_close in case it is still open
1935  */
1936 static void em28xx_usb_disconnect(struct usb_interface *interface)
1937 {
1938         struct em28xx *dev = usb_get_intfdata(interface);
1939         usb_set_intfdata(interface, NULL);
1940
1941 /*FIXME: IR should be disconnected */
1942
1943         if (!dev)
1944                 return;
1945
1946
1947         down_write(&em28xx_disconnect);
1948
1949         down(&dev->lock);
1950
1951         em28xx_info("disconnecting %s\n", dev->vdev->name);
1952
1953         wake_up_interruptible_all(&dev->open);
1954
1955         if (dev->users) {
1956                 em28xx_warn
1957                     ("device /dev/video%d is open! Deregistration and memory "
1958                      "deallocation are deferred on close.\n", dev->vdev->minor);
1959                 dev->state |= DEV_MISCONFIGURED;
1960                 em28xx_uninit_isoc(dev);
1961                 dev->state |= DEV_DISCONNECTED;
1962                 wake_up_interruptible(&dev->wait_frame);
1963                 wake_up_interruptible(&dev->wait_stream);
1964         } else {
1965                 dev->state |= DEV_DISCONNECTED;
1966                 em28xx_release_resources(dev);
1967         }
1968
1969         up(&dev->lock);
1970
1971         if (!dev->users) {
1972                 kfree(dev->alt_max_pkt_size);
1973                 kfree(dev);
1974         }
1975
1976         up_write(&em28xx_disconnect);
1977 }
1978
1979 static struct usb_driver em28xx_usb_driver = {
1980         .name = "em28xx",
1981         .probe = em28xx_usb_probe,
1982         .disconnect = em28xx_usb_disconnect,
1983         .id_table = em28xx_id_table,
1984 };
1985
1986 static int __init em28xx_module_init(void)
1987 {
1988         int result;
1989
1990         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1991                (EM28XX_VERSION_CODE >> 16) & 0xff,
1992                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1993 #ifdef SNAPSHOT
1994         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1995                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1996 #endif
1997
1998         /* register this driver with the USB subsystem */
1999         result = usb_register(&em28xx_usb_driver);
2000         if (result)
2001                 em28xx_err(DRIVER_NAME
2002                            " usb_register failed. Error number %d.\n", result);
2003
2004         return result;
2005 }
2006
2007 static void __exit em28xx_module_exit(void)
2008 {
2009         /* deregister this driver with the USB subsystem */
2010         usb_deregister(&em28xx_usb_driver);
2011 }
2012
2013 module_init(em28xx_module_init);
2014 module_exit(em28xx_module_exit);