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