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    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/list.h>
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28 #include <linux/usb.h>
  29 #include <linux/i2c.h>
  30 #include <linux/version.h>
  31 #include <linux/video_decoder.h>
  32
  33 #include "em28xx.h"
  34 #include <media/tuner.h>
  35 #include <media/v4l2-common.h>
  36
  37 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  38                       "Markus Rechberger <mrechberger@gmail.com>, " \
  39                       "Mauro Carvalho Chehab <mchehab@brturbo.com.br>, " \
  40                       "Sascha Sommer <saschasommer@freenet.de>"
  41
  42 #define DRIVER_NAME         "em28xx"
  43 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  44 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  45
  46 #define em28xx_videodbg(fmt, arg...) do {\
  47         if (video_debug) \
  48                 printk(KERN_INFO "%s %s :"fmt, \
  49                          dev->name, __FUNCTION__ , ##arg); } while (0)
  50
  51 MODULE_AUTHOR(DRIVER_AUTHOR);
  52 MODULE_DESCRIPTION(DRIVER_DESC);
  53 MODULE_LICENSE("GPL");
  54
  55 static LIST_HEAD(em28xx_devlist);
  56
  57 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  58 module_param_array(card,  int, NULL, 0444);
  59 MODULE_PARM_DESC(card,"card type");
  60
  61 static int tuner = -1;
  62 module_param(tuner, int, 0444);
  63 MODULE_PARM_DESC(tuner, "tuner type");
  64
  65 static unsigned int video_debug = 0;
  66 module_param(video_debug,int,0644);
  67 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  68
  69 /* supported tv norms */
  70 static struct em28xx_tvnorm tvnorms[] = {
  71         {
  72                 .name = "PAL",
  73                 .id = V4L2_STD_PAL,
  74                 .mode = VIDEO_MODE_PAL,
  75          }, {
  76                 .name = "NTSC",
  77                 .id = V4L2_STD_NTSC,
  78                 .mode = VIDEO_MODE_NTSC,
  79         }, {
  80                  .name = "SECAM",
  81                  .id = V4L2_STD_SECAM,
  82                  .mode = VIDEO_MODE_SECAM,
  83         }, {
  84                 .name = "PAL-M",
  85                 .id = V4L2_STD_PAL_M,
  86                 .mode = VIDEO_MODE_PAL,
  87         }
  88 };
  89
  90 static const unsigned char saa7114_i2c_init[] = {
  91         0x00,0x00,0x01,0x08,0x02,0xc4,0x03,0x30,0x04,0x90,0x05,0x90,0x06,0xeb,0x07,0xe0,
  92         0x08,0x88,0x09,0x40,0x0a,0x80,0x0b,0x44,0x0c,0x40,0x0d,0x00,0x0e,0x81,0x0f,0x2a,
  93         0x10,0x06,0x11,0x00,0x12,0xc8,0x13,0x80,0x14,0x00,0x15,0x11,0x16,0x01,0x17,0x42,
  94         0x18,0x40,0x19,0x80,0x40,0x00,0x41,0xff,0x42,0xff,0x43,0xff,0x44,0xff,0x45,0xff,
  95         0x46,0xff,0x47,0xff,0x48,0xff,0x49,0xff,0x4a,0xff,0x4b,0xff,0x4c,0xff,0x4d,0xff,
  96         0x4e,0xff,0x4f,0xff,0x50,0xff,0x51,0xff,0x52,0xff,0x53,0xff,0x54,0x5f,0x55,0xff,
  97         0x56,0xff,0x57,0xff,0x58,0x00,0x59,0x47,0x5a,0x03,0x5b,0x03,0x5d,0x3e,0x5e,0x00,
  98         0x80,0x1c,0x83,0x01,0x84,0xa5,0x85,0x10,0x86,0x45,0x87,0x41,0x88,0xf0,0x88,0x00,
  99         0x88,0xf0,0x90,0x00,0x91,0x08,0x92,0x00,0x93,0x80,0x94,0x08,0x95,0x00,0x96,0xc0,
 100         0x97,0x02,0x98,0x13,0x99,0x00,0x9a,0x38,0x9b,0x01,0x9c,0x80,0x9d,0x02,0x9e,0x06,
 101         0x9f,0x01,0xa0,0x01,0xa1,0x00,0xa2,0x00,0xa4,0x80,0xa5,0x36,0xa6,0x36,0xa8,0x67,
 102         0xa9,0x04,0xaa,0x00,0xac,0x33,0xad,0x02,0xae,0x00,0xb0,0xcd,0xb1,0x04,0xb2,0xcd,
 103         0xb3,0x04,0xb4,0x01,0xb8,0x00,0xb9,0x00,0xba,0x00,0xbb,0x00,0xbc,0x00,0xbd,0x00,
 104         0xbe,0x00,0xbf,0x00
 105 };
 106
 107 #define TVNORMS ARRAY_SIZE(tvnorms)
 108
 109 /* supported controls */
 110 /* Common to all boards */
 111 static struct v4l2_queryctrl em28xx_qctrl[] = {
 112         {
 113                 .id = V4L2_CID_AUDIO_VOLUME,
 114                 .type = V4L2_CTRL_TYPE_INTEGER,
 115                 .name = "Volume",
 116                 .minimum = 0x0,
 117                 .maximum = 0x1f,
 118                 .step = 0x1,
 119                 .default_value = 0x1f,
 120                 .flags = 0,
 121         },{
 122                 .id = V4L2_CID_AUDIO_MUTE,
 123                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 124                 .name = "Mute",
 125                 .minimum = 0,
 126                 .maximum = 1,
 127                 .step = 1,
 128                 .default_value = 1,
 129                 .flags = 0,
 130         }
 131 };
 132
 133 /* FIXME: These are specific to saa711x - should be moved to its code */
 134 static struct v4l2_queryctrl saa711x_qctrl[] = {
 135         {
 136                 .id = V4L2_CID_BRIGHTNESS,
 137                 .type = V4L2_CTRL_TYPE_INTEGER,
 138                 .name = "Brightness",
 139                 .minimum = -128,
 140                 .maximum = 127,
 141                 .step = 1,
 142                 .default_value = 0,
 143                 .flags = 0,
 144         },{
 145                 .id = V4L2_CID_CONTRAST,
 146                 .type = V4L2_CTRL_TYPE_INTEGER,
 147                 .name = "Contrast",
 148                 .minimum = 0x0,
 149                 .maximum = 0x1f,
 150                 .step = 0x1,
 151                 .default_value = 0x10,
 152                 .flags = 0,
 153         },{
 154                 .id = V4L2_CID_SATURATION,
 155                 .type = V4L2_CTRL_TYPE_INTEGER,
 156                 .name = "Saturation",
 157                 .minimum = 0x0,
 158                 .maximum = 0x1f,
 159                 .step = 0x1,
 160                 .default_value = 0x10,
 161                 .flags = 0,
 162         },{
 163                 .id = V4L2_CID_RED_BALANCE,
 164                 .type = V4L2_CTRL_TYPE_INTEGER,
 165                 .name = "Red chroma balance",
 166                 .minimum = -128,
 167                 .maximum = 127,
 168                 .step = 1,
 169                 .default_value = 0,
 170                 .flags = 0,
 171         },{
 172                 .id = V4L2_CID_BLUE_BALANCE,
 173                 .type = V4L2_CTRL_TYPE_INTEGER,
 174                 .name = "Blue chroma balance",
 175                 .minimum = -128,
 176                 .maximum = 127,
 177                 .step = 1,
 178                 .default_value = 0,
 179                 .flags = 0,
 180         },{
 181                 .id = V4L2_CID_GAMMA,
 182                 .type = V4L2_CTRL_TYPE_INTEGER,
 183                 .name = "Gamma",
 184                 .minimum = 0x0,
 185                 .maximum = 0x3f,
 186                 .step = 0x1,
 187                 .default_value = 0x20,
 188                 .flags = 0,
 189         }
 190 };
 191
 192 static struct usb_driver em28xx_usb_driver;
 193
 194 static DECLARE_MUTEX(em28xx_sysfs_lock);
 195 static DECLARE_RWSEM(em28xx_disconnect);
 196
 197 /*********************  v4l2 interface  ******************************************/
 198
 199 /*
 200  * em28xx_config()
 201  * inits registers with sane defaults
 202  */
 203 static int em28xx_config(struct em28xx *dev)
 204 {
 205
 206         /* Sets I2C speed to 100 KHz */
 207         em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 208
 209         /* enable vbi capturing */
 210         em28xx_audio_usb_mute(dev, 1);
 211         dev->mute = 1;          /* maybe not the right place... */
 212         dev->volume = 0x1f;
 213         em28xx_audio_analog_set(dev);
 214         em28xx_audio_analog_setup(dev);
 215         em28xx_outfmt_set_yuv422(dev);
 216         em28xx_colorlevels_set_default(dev);
 217         em28xx_compression_disable(dev);
 218
 219         return 0;
 220 }
 221
 222 /*
 223  * em28xx_config_i2c()
 224  * configure i2c attached devices
 225  */
 226 static void em28xx_config_i2c(struct em28xx *dev)
 227 {
 228         struct v4l2_frequency f;
 229         struct video_decoder_init em28xx_vdi = {.data = NULL };
 230
 231
 232         /* configure decoder */
 233         if(dev->model == EM2820_BOARD_MSI_VOX_USB_2){
 234                 em28xx_vdi.data=saa7114_i2c_init;
 235                 em28xx_vdi.len=sizeof(saa7114_i2c_init);
 236         }
 237
 238
 239         em28xx_i2c_call_clients(dev, DECODER_INIT, &em28xx_vdi);
 240         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
 241 /*      em28xx_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
 242 /*      em28xx_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
 243 /*      em28xx_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
 244 /*      em28xx_i2c_call_clients(dev,DECODER_DUMP, NULL); */
 245
 246         /* configure tuner */
 247         f.tuner = 0;
 248         f.type = V4L2_TUNER_ANALOG_TV;
 249         f.frequency = 9076;     /* FIXME:remove magic number */
 250         dev->ctl_freq = f.frequency;
 251         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 252
 253         /* configure tda9887 */
 254
 255
 256 /*      em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
 257 }
 258
 259 /*
 260  * em28xx_empty_framequeues()
 261  * prepare queues for incoming and outgoing frames
 262  */
 263 static void em28xx_empty_framequeues(struct em28xx *dev)
 264 {
 265         u32 i;
 266
 267         INIT_LIST_HEAD(&dev->inqueue);
 268         INIT_LIST_HEAD(&dev->outqueue);
 269
 270         for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
 271                 dev->frame[i].state = F_UNUSED;
 272                 dev->frame[i].buf.bytesused = 0;
 273         }
 274 }
 275
 276 static void video_mux(struct em28xx *dev, int index)
 277 {
 278         int input, ainput;
 279
 280         input = INPUT(index)->vmux;
 281         dev->ctl_input = index;
 282         dev->ctl_ainput = INPUT(index)->amux;
 283
 284         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
 285
 286
 287         em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
 288
 289         if (dev->has_msp34xx) {
 290                 if (dev->i2s_speed)
 291                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 292                 em28xx_i2c_call_clients(dev, VIDIOC_S_AUDIO, &dev->ctl_ainput);
 293                 ainput = EM28XX_AUDIO_SRC_TUNER;
 294                 em28xx_audio_source(dev, ainput);
 295         } else {
 296                 switch (dev->ctl_ainput) {
 297                 case 0:
 298                         ainput = EM28XX_AUDIO_SRC_TUNER;
 299                         break;
 300                 default:
 301                         ainput = EM28XX_AUDIO_SRC_LINE;
 302                 }
 303                 em28xx_audio_source(dev, ainput);
 304         }
 305 }
 306
 307 /*
 308  * em28xx_v4l2_open()
 309  * inits the device and starts isoc transfer
 310  */
 311 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 312 {
 313         int minor = iminor(inode);
 314         int errCode = 0;
 315         struct em28xx *h,*dev = NULL;
 316         struct list_head *list;
 317
 318         list_for_each(list,&em28xx_devlist) {
 319                 h = list_entry(list, struct em28xx, devlist);
 320                 if (h->vdev->minor == minor) {
 321                         dev  = h;
 322                 }
 323         }
 324
 325         filp->private_data=dev;
 326
 327
 328         em28xx_videodbg("users=%d\n", dev->users);
 329
 330         if (!down_read_trylock(&em28xx_disconnect))
 331                 return -ERESTARTSYS;
 332
 333         if (dev->users) {
 334                 em28xx_warn("this driver can be opened only once\n");
 335                 up_read(&em28xx_disconnect);
 336                 return -EBUSY;
 337         }
 338
 339 /*      if(dev->vbi_dev->minor == minor){
 340                 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
 341         }*/
 342         if (dev->vdev->minor == minor) {
 343                 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 344         }
 345
 346         init_MUTEX(&dev->fileop_lock);  /* to 1 == available */
 347         spin_lock_init(&dev->queue_lock);
 348         init_waitqueue_head(&dev->wait_frame);
 349         init_waitqueue_head(&dev->wait_stream);
 350
 351         down(&dev->lock);
 352
 353         em28xx_set_alternate(dev);
 354
 355         dev->width = norm_maxw(dev);
 356         dev->height = norm_maxh(dev);
 357         dev->frame_size = dev->width * dev->height * 2;
 358         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 359         dev->bytesperline = dev->width * 2;
 360         dev->hscale = 0;
 361         dev->vscale = 0;
 362
 363         em28xx_capture_start(dev, 1);
 364         em28xx_resolution_set(dev);
 365
 366         /* start the transfer */
 367         errCode = em28xx_init_isoc(dev);
 368         if (errCode)
 369                 goto err;
 370
 371         dev->users++;
 372         filp->private_data = dev;
 373         dev->io = IO_NONE;
 374         dev->stream = STREAM_OFF;
 375         dev->num_frames = 0;
 376
 377         /* prepare queues */
 378         em28xx_empty_framequeues(dev);
 379
 380         dev->state |= DEV_INITIALIZED;
 381
 382         video_mux(dev, 0);
 383
 384       err:
 385         up(&dev->lock);
 386         up_read(&em28xx_disconnect);
 387         return errCode;
 388 }
 389
 390 /*
 391  * em28xx_realease_resources()
 392  * unregisters the v4l2,i2c and usb devices
 393  * called when the device gets disconected or at module unload
 394 */
 395 static void em28xx_release_resources(struct em28xx *dev)
 396 {
 397         down(&em28xx_sysfs_lock);
 398
 399         em28xx_info("V4L2 device /dev/video%d deregistered\n",
 400                     dev->vdev->minor);
 401         list_del(&dev->devlist);
 402         video_unregister_device(dev->vdev);
 403 /*      video_unregister_device(dev->vbi_dev); */
 404         em28xx_i2c_unregister(dev);
 405         usb_put_dev(dev->udev);
 406         up(&em28xx_sysfs_lock);
 407 }
 408
 409 /*
 410  * em28xx_v4l2_close()
 411  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 412  */
 413 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 414 {
 415         int errCode;
 416         struct em28xx *dev=filp->private_data;
 417
 418         em28xx_videodbg("users=%d\n", dev->users);
 419
 420         down(&dev->lock);
 421
 422         em28xx_uninit_isoc(dev);
 423
 424         em28xx_release_buffers(dev);
 425
 426         /* the device is already disconnect, free the remaining resources */
 427         if (dev->state & DEV_DISCONNECTED) {
 428                 em28xx_release_resources(dev);
 429                 up(&dev->lock);
 430                 kfree(dev);
 431                 return 0;
 432         }
 433
 434         /* set alternate 0 */
 435         dev->alt = 0;
 436         em28xx_videodbg("setting alternate 0\n");
 437         errCode = usb_set_interface(dev->udev, 0, 0);
 438         if (errCode < 0) {
 439                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 440                      errCode);
 441         }
 442
 443         dev->users--;
 444         wake_up_interruptible_nr(&dev->open, 1);
 445         up(&dev->lock);
 446         return 0;
 447 }
 448
 449 /*
 450  * em28xx_v4l2_read()
 451  * will allocate buffers when called for the first time
 452  */
 453 static ssize_t
 454 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 455                  loff_t * f_pos)
 456 {
 457         struct em28xx_frame_t *f, *i;
 458         unsigned long lock_flags;
 459         int ret = 0;
 460         struct em28xx *dev = filp->private_data;
 461
 462         if (down_interruptible(&dev->fileop_lock))
 463                 return -ERESTARTSYS;
 464
 465         if (dev->state & DEV_DISCONNECTED) {
 466                 em28xx_videodbg("device not present\n");
 467                 up(&dev->fileop_lock);
 468                 return -ENODEV;
 469         }
 470
 471         if (dev->state & DEV_MISCONFIGURED) {
 472                 em28xx_videodbg("device misconfigured; close and open it again\n");
 473                 up(&dev->fileop_lock);
 474                 return -EIO;
 475         }
 476
 477         if (dev->io == IO_MMAP) {
 478                 em28xx_videodbg ("IO method is set to mmap; close and open"
 479                                 " the device again to choose the read method\n");
 480                 up(&dev->fileop_lock);
 481                 return -EINVAL;
 482         }
 483
 484         if (dev->io == IO_NONE) {
 485                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 486                         em28xx_errdev("read failed, not enough memory\n");
 487                         up(&dev->fileop_lock);
 488                         return -ENOMEM;
 489                 }
 490                 dev->io = IO_READ;
 491                 dev->stream = STREAM_ON;
 492                 em28xx_queue_unusedframes(dev);
 493         }
 494
 495         if (!count) {
 496                 up(&dev->fileop_lock);
 497                 return 0;
 498         }
 499
 500         if (list_empty(&dev->outqueue)) {
 501                 if (filp->f_flags & O_NONBLOCK) {
 502                         up(&dev->fileop_lock);
 503                         return -EAGAIN;
 504                 }
 505                 ret = wait_event_interruptible
 506                     (dev->wait_frame,
 507                      (!list_empty(&dev->outqueue)) ||
 508                      (dev->state & DEV_DISCONNECTED));
 509                 if (ret) {
 510                         up(&dev->fileop_lock);
 511                         return ret;
 512                 }
 513                 if (dev->state & DEV_DISCONNECTED) {
 514                         up(&dev->fileop_lock);
 515                         return -ENODEV;
 516                 }
 517         }
 518
 519         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 520
 521         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 522         list_for_each_entry(i, &dev->outqueue, frame)
 523             i->state = F_UNUSED;
 524         INIT_LIST_HEAD(&dev->outqueue);
 525         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 526
 527         em28xx_queue_unusedframes(dev);
 528
 529         if (count > f->buf.length)
 530                 count = f->buf.length;
 531
 532         if (copy_to_user(buf, f->bufmem, count)) {
 533                 up(&dev->fileop_lock);
 534                 return -EFAULT;
 535         }
 536         *f_pos += count;
 537
 538         up(&dev->fileop_lock);
 539
 540         return count;
 541 }
 542
 543 /*
 544  * em28xx_v4l2_poll()
 545  * will allocate buffers when called for the first time
 546  */
 547 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 548 {
 549         unsigned int mask = 0;
 550         struct em28xx *dev = filp->private_data;
 551
 552         if (down_interruptible(&dev->fileop_lock))
 553                 return POLLERR;
 554
 555         if (dev->state & DEV_DISCONNECTED) {
 556                 em28xx_videodbg("device not present\n");
 557         } else if (dev->state & DEV_MISCONFIGURED) {
 558                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 559         } else {
 560                 if (dev->io == IO_NONE) {
 561                         if (!em28xx_request_buffers
 562                             (dev, EM28XX_NUM_READ_FRAMES)) {
 563                                 em28xx_warn
 564                                     ("poll() failed, not enough memory\n");
 565                         } else {
 566                                 dev->io = IO_READ;
 567                                 dev->stream = STREAM_ON;
 568                         }
 569                 }
 570
 571                 if (dev->io == IO_READ) {
 572                         em28xx_queue_unusedframes(dev);
 573                         poll_wait(filp, &dev->wait_frame, wait);
 574
 575                         if (!list_empty(&dev->outqueue))
 576                                 mask |= POLLIN | POLLRDNORM;
 577
 578                         up(&dev->fileop_lock);
 579
 580                         return mask;
 581                 }
 582         }
 583
 584         up(&dev->fileop_lock);
 585         return POLLERR;
 586 }
 587
 588 /*
 589  * em28xx_vm_open()
 590  */
 591 static void em28xx_vm_open(struct vm_area_struct *vma)
 592 {
 593         struct em28xx_frame_t *f = vma->vm_private_data;
 594         f->vma_use_count++;
 595 }
 596
 597 /*
 598  * em28xx_vm_close()
 599  */
 600 static void em28xx_vm_close(struct vm_area_struct *vma)
 601 {
 602         /* NOTE: buffers are not freed here */
 603         struct em28xx_frame_t *f = vma->vm_private_data;
 604         f->vma_use_count--;
 605 }
 606
 607 static struct vm_operations_struct em28xx_vm_ops = {
 608         .open = em28xx_vm_open,
 609         .close = em28xx_vm_close,
 610 };
 611
 612 /*
 613  * em28xx_v4l2_mmap()
 614  */
 615 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 616 {
 617         unsigned long size = vma->vm_end - vma->vm_start,
 618             start = vma->vm_start;
 619         void *pos;
 620         u32 i;
 621
 622         struct em28xx *dev = filp->private_data;
 623
 624         if (down_interruptible(&dev->fileop_lock))
 625                 return -ERESTARTSYS;
 626
 627         if (dev->state & DEV_DISCONNECTED) {
 628                 em28xx_videodbg("mmap: device not present\n");
 629                 up(&dev->fileop_lock);
 630                 return -ENODEV;
 631         }
 632
 633         if (dev->state & DEV_MISCONFIGURED) {
 634                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 635                                                 "open it again\n");
 636                 up(&dev->fileop_lock);
 637                 return -EIO;
 638         }
 639
 640         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 641             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 642                 up(&dev->fileop_lock);
 643                 return -EINVAL;
 644         }
 645
 646         for (i = 0; i < dev->num_frames; i++) {
 647                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 648                         break;
 649         }
 650         if (i == dev->num_frames) {
 651                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 652                 up(&dev->fileop_lock);
 653                 return -EINVAL;
 654         }
 655
 656         /* VM_IO is eventually going to replace PageReserved altogether */
 657         vma->vm_flags |= VM_IO;
 658         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 659
 660         pos = dev->frame[i].bufmem;
 661         while (size > 0) {      /* size is page-aligned */
 662                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 663                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 664                         up(&dev->fileop_lock);
 665                         return -EAGAIN;
 666                 }
 667                 start += PAGE_SIZE;
 668                 pos += PAGE_SIZE;
 669                 size -= PAGE_SIZE;
 670         }
 671
 672         vma->vm_ops = &em28xx_vm_ops;
 673         vma->vm_private_data = &dev->frame[i];
 674
 675         em28xx_vm_open(vma);
 676         up(&dev->fileop_lock);
 677         return 0;
 678 }
 679
 680 /*
 681  * em28xx_get_ctrl()
 682  * return the current saturation, brightness or contrast, mute state
 683  */
 684 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 685 {
 686         switch (ctrl->id) {
 687         case V4L2_CID_AUDIO_MUTE:
 688                 ctrl->value = dev->mute;
 689                 return 0;
 690         case V4L2_CID_AUDIO_VOLUME:
 691                 ctrl->value = dev->volume;
 692                 return 0;
 693         default:
 694                 return -EINVAL;
 695         }
 696 }
 697
 698 /*FIXME: should be moved to saa711x */
 699 static int saa711x_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 700 {
 701         s32 tmp;
 702         switch (ctrl->id) {
 703         case V4L2_CID_BRIGHTNESS:
 704                 if ((tmp = em28xx_brightness_get(dev)) < 0)
 705                         return -EIO;
 706                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 707                 return 0;
 708         case V4L2_CID_CONTRAST:
 709                 if ((ctrl->value = em28xx_contrast_get(dev)) < 0)
 710                         return -EIO;
 711                 return 0;
 712         case V4L2_CID_SATURATION:
 713                 if ((ctrl->value = em28xx_saturation_get(dev)) < 0)
 714                         return -EIO;
 715                 return 0;
 716         case V4L2_CID_RED_BALANCE:
 717                 if ((tmp = em28xx_v_balance_get(dev)) < 0)
 718                         return -EIO;
 719                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 720                 return 0;
 721         case V4L2_CID_BLUE_BALANCE:
 722                 if ((tmp = em28xx_u_balance_get(dev)) < 0)
 723                         return -EIO;
 724                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 725                 return 0;
 726         case V4L2_CID_GAMMA:
 727                 if ((ctrl->value = em28xx_gamma_get(dev)) < 0)
 728                         return -EIO;
 729                 return 0;
 730         default:
 731                 return -EINVAL;
 732         }
 733 }
 734
 735 /*
 736  * em28xx_set_ctrl()
 737  * mute or set new saturation, brightness or contrast
 738  */
 739 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 740 {
 741         switch (ctrl->id) {
 742         case V4L2_CID_AUDIO_MUTE:
 743                 if (ctrl->value != dev->mute) {
 744                         dev->mute = ctrl->value;
 745                         em28xx_audio_usb_mute(dev, ctrl->value);
 746                         return em28xx_audio_analog_set(dev);
 747                 }
 748                 return 0;
 749         case V4L2_CID_AUDIO_VOLUME:
 750                 dev->volume = ctrl->value;
 751                 return em28xx_audio_analog_set(dev);
 752         default:
 753                 return -EINVAL;
 754         }
 755 }
 756
 757 /*FIXME: should be moved to saa711x */
 758 static int saa711x_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 759 {
 760         switch (ctrl->id) {
 761         case V4L2_CID_BRIGHTNESS:
 762                 return em28xx_brightness_set(dev, ctrl->value);
 763         case V4L2_CID_CONTRAST:
 764                 return em28xx_contrast_set(dev, ctrl->value);
 765         case V4L2_CID_SATURATION:
 766                 return em28xx_saturation_set(dev, ctrl->value);
 767         case V4L2_CID_RED_BALANCE:
 768                 return em28xx_v_balance_set(dev, ctrl->value);
 769         case V4L2_CID_BLUE_BALANCE:
 770                 return em28xx_u_balance_set(dev, ctrl->value);
 771         case V4L2_CID_GAMMA:
 772                 return em28xx_gamma_set(dev, ctrl->value);
 773         default:
 774                 return -EINVAL;
 775         }
 776 }
 777
 778 /*
 779  * em28xx_stream_interrupt()
 780  * stops streaming
 781  */
 782 static int em28xx_stream_interrupt(struct em28xx *dev)
 783 {
 784         int ret = 0;
 785
 786         /* stop reading from the device */
 787
 788         dev->stream = STREAM_INTERRUPT;
 789         ret = wait_event_timeout(dev->wait_stream,
 790                                  (dev->stream == STREAM_OFF) ||
 791                                  (dev->state & DEV_DISCONNECTED),
 792                                  EM28XX_URB_TIMEOUT);
 793         if (dev->state & DEV_DISCONNECTED)
 794                 return -ENODEV;
 795         else if (ret) {
 796                 dev->state |= DEV_MISCONFIGURED;
 797                 em28xx_videodbg("device is misconfigured; close and "
 798                         "open /dev/video%d again\n", dev->vdev->minor);
 799                 return ret;
 800         }
 801
 802         return 0;
 803 }
 804
 805 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 806 {
 807         unsigned int hscale, vscale;
 808         unsigned int maxh, maxw;
 809
 810         maxw = norm_maxw(dev);
 811         maxh = norm_maxh(dev);
 812
 813         /* width must even because of the YUYV format */
 814         /* height must be even because of interlacing */
 815         height &= 0xfffe;
 816         width &= 0xfffe;
 817
 818         if (height < 32)
 819                 height = 32;
 820         if (height > maxh)
 821                 height = maxh;
 822         if (width < 48)
 823                 width = 48;
 824         if (width > maxw)
 825                 width = maxw;
 826
 827         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 828                 hscale = 0x3fff;
 829         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 830
 831         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 832                 vscale = 0x3fff;
 833         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 834
 835         /* set new image size */
 836         dev->width = width;
 837         dev->height = height;
 838         dev->frame_size = dev->width * dev->height * 2;
 839         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 840         dev->bytesperline = dev->width * 2;
 841         dev->hscale = hscale;
 842         dev->vscale = vscale;
 843
 844         em28xx_resolution_set(dev);
 845
 846         return 0;
 847 }
 848
 849 /*
 850  * em28xx_v4l2_do_ioctl()
 851  * This function is _not_ called directly, but from
 852  * em28xx_v4l2_ioctl. Userspace
 853  * copying is done already, arg is a kernel pointer.
 854  */
 855 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 856                            struct em28xx *dev, unsigned int cmd, void *arg,
 857                            v4l2_kioctl driver_ioctl)
 858 {
 859         int ret;
 860
 861         switch (cmd) {
 862                 /* ---------- tv norms ---------- */
 863         case VIDIOC_ENUMSTD:
 864                 {
 865                         struct v4l2_standard *e = arg;
 866                         unsigned int i;
 867
 868                         i = e->index;
 869                         if (i >= TVNORMS)
 870                                 return -EINVAL;
 871                         ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 872                                                        tvnorms[e->index].name);
 873                         e->index = i;
 874                         if (ret < 0)
 875                                 return ret;
 876                         return 0;
 877                 }
 878         case VIDIOC_G_STD:
 879                 {
 880                         v4l2_std_id *id = arg;
 881
 882                         *id = dev->tvnorm->id;
 883                         return 0;
 884                 }
 885         case VIDIOC_S_STD:
 886                 {
 887                         v4l2_std_id *id = arg;
 888                         unsigned int i;
 889
 890                         for (i = 0; i < TVNORMS; i++)
 891                                 if (*id == tvnorms[i].id)
 892                                         break;
 893                         if (i == TVNORMS)
 894                                 for (i = 0; i < TVNORMS; i++)
 895                                         if (*id & tvnorms[i].id)
 896                                                 break;
 897                         if (i == TVNORMS)
 898                                 return -EINVAL;
 899
 900                         down(&dev->lock);
 901                         dev->tvnorm = &tvnorms[i];
 902
 903                         em28xx_set_norm(dev, dev->width, dev->height);
 904
 905 /*
 906                 dev->width=norm_maxw(dev);
 907                 dev->height=norm_maxh(dev);
 908                 dev->frame_size=dev->width*dev->height*2;
 909                 dev->field_size=dev->frame_size>>1;
 910                 dev->bytesperline=dev->width*2;
 911                 dev->hscale=0;
 912                 dev->vscale=0;
 913
 914                 em28xx_resolution_set(dev);
 915 */
 916 /*
 917                 em28xx_uninit_isoc(dev);
 918                 em28xx_set_alternate(dev);
 919                 em28xx_capture_start(dev, 1);
 920                 em28xx_resolution_set(dev);
 921                 em28xx_init_isoc(dev);
 922 */
 923                         em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
 924                                                 &tvnorms[i].mode);
 925                         em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
 926                                                 &dev->tvnorm->id);
 927
 928                         up(&dev->lock);
 929
 930                         return 0;
 931                 }
 932
 933                 /* ------ input switching ---------- */
 934         case VIDIOC_ENUMINPUT:
 935                 {
 936                         struct v4l2_input *i = arg;
 937                         unsigned int n;
 938                         static const char *iname[] = {
 939                                 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 940                                 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 941                                 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 942                                 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 943                                 [EM28XX_VMUX_SVIDEO] = "S-Video",
 944                                 [EM28XX_VMUX_TELEVISION] = "Television",
 945                                 [EM28XX_VMUX_CABLE] = "Cable TV",
 946                                 [EM28XX_VMUX_DVB] = "DVB",
 947                                 [EM28XX_VMUX_DEBUG] = "for debug only",
 948                         };
 949
 950                         n = i->index;
 951                         if (n >= MAX_EM28XX_INPUT)
 952                                 return -EINVAL;
 953                         if (0 == INPUT(n)->type)
 954                                 return -EINVAL;
 955                         memset(i, 0, sizeof(*i));
 956                         i->index = n;
 957                         i->type = V4L2_INPUT_TYPE_CAMERA;
 958                         strcpy(i->name, iname[INPUT(n)->type]);
 959                         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 960                             (EM28XX_VMUX_CABLE == INPUT(n)->type))
 961                                 i->type = V4L2_INPUT_TYPE_TUNER;
 962                         for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
 963                                 i->std |= tvnorms[n].id;
 964                         return 0;
 965                 }
 966
 967         case VIDIOC_G_INPUT:
 968                 {
 969                         int *i = arg;
 970                         *i = dev->ctl_input;
 971
 972                         return 0;
 973                 }
 974
 975         case VIDIOC_S_INPUT:
 976                 {
 977                         int *index = arg;
 978
 979                         if (*index >= MAX_EM28XX_INPUT)
 980                                 return -EINVAL;
 981                         if (0 == INPUT(*index)->type)
 982                                 return -EINVAL;
 983
 984                         down(&dev->lock);
 985                         video_mux(dev, *index);
 986                         up(&dev->lock);
 987
 988                         return 0;
 989                 }
 990
 991         case VIDIOC_G_AUDIO:
 992                 {
 993                         struct v4l2_audio *a = arg;
 994                         unsigned int index = a->index;
 995
 996                         if (a->index > 1)
 997                                 return -EINVAL;
 998                         memset(a, 0, sizeof(*a));
 999                         index = dev->ctl_ainput;
1000
1001                         if (index == 0) {
1002                                 strcpy(a->name, "Television");
1003                         } else {
1004                                 strcpy(a->name, "Line In");
1005                         }
1006                         a->capability = V4L2_AUDCAP_STEREO;
1007                         a->index = index;
1008                         return 0;
1009                 }
1010
1011         case VIDIOC_S_AUDIO:
1012                 {
1013                         struct v4l2_audio *a = arg;
1014                         if (a->index != dev->ctl_ainput)
1015                                 return -EINVAL;
1016
1017                         return 0;
1018                 }
1019
1020                 /* --- controls ---------------------------------------------- */
1021         case VIDIOC_QUERYCTRL:
1022                 {
1023                         struct v4l2_queryctrl *qc = arg;
1024                         int i, id=qc->id;
1025
1026                         memset(qc,0,sizeof(*qc));
1027                         qc->id=id;
1028
1029                         if (!dev->has_msp34xx) {
1030                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1031                                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1032                                                 memcpy(qc, &(em28xx_qctrl[i]),
1033                                                 sizeof(*qc));
1034                                                 return 0;
1035                                         }
1036                                 }
1037                         }
1038                         if (dev->decoder == EM28XX_TVP5150) {
1039                                 em28xx_i2c_call_clients(dev,cmd,qc);
1040                                 if (qc->type)
1041                                         return 0;
1042                                 else
1043                                         return -EINVAL;
1044                         }
1045                         for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1046                                 if (qc->id && qc->id == saa711x_qctrl[i].id) {
1047                                         memcpy(qc, &(saa711x_qctrl[i]),
1048                                                sizeof(*qc));
1049                                         return 0;
1050                                 }
1051                         }
1052
1053                         return -EINVAL;
1054                 }
1055
1056         case VIDIOC_G_CTRL:
1057                 {
1058                         struct v4l2_control *ctrl = arg;
1059                         int retval=-EINVAL;
1060
1061                         if (!dev->has_msp34xx)
1062                                 retval=em28xx_get_ctrl(dev, ctrl);
1063                         if (retval==-EINVAL) {
1064                                 if (dev->decoder == EM28XX_TVP5150) {
1065                                         em28xx_i2c_call_clients(dev,cmd,arg);
1066                                         return 0;
1067                                 }
1068
1069                                 return saa711x_get_ctrl(dev, ctrl);
1070                         } else return retval;
1071                 }
1072
1073         case VIDIOC_S_CTRL:
1074                 {
1075                         struct v4l2_control *ctrl = arg;
1076                         u8 i;
1077
1078                         if (!dev->has_msp34xx){
1079                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1080                                         if (ctrl->id == em28xx_qctrl[i].id) {
1081                                                 if (ctrl->value <
1082                                                 em28xx_qctrl[i].minimum
1083                                                 || ctrl->value >
1084                                                 em28xx_qctrl[i].maximum)
1085                                                         return -ERANGE;
1086                                                 return em28xx_set_ctrl(dev, ctrl);
1087                                         }
1088                                 }
1089                         }
1090
1091                         if (dev->decoder == EM28XX_TVP5150) {
1092                                 em28xx_i2c_call_clients(dev,cmd,arg);
1093                                 return 0;
1094                         } else if (!dev->has_msp34xx) {
1095                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1096                                         if (ctrl->id == em28xx_qctrl[i].id) {
1097                                                 if (ctrl->value <
1098                                                 em28xx_qctrl[i].minimum
1099                                                 || ctrl->value >
1100                                                 em28xx_qctrl[i].maximum)
1101                                                         return -ERANGE;
1102                                                 return em28xx_set_ctrl(dev, ctrl);
1103                                         }
1104                                 }
1105                                 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1106                                         if (ctrl->id == saa711x_qctrl[i].id) {
1107                                                 if (ctrl->value <
1108                                                 saa711x_qctrl[i].minimum
1109                                                 || ctrl->value >
1110                                                 saa711x_qctrl[i].maximum)
1111                                                         return -ERANGE;
1112                                                 return saa711x_set_ctrl(dev, ctrl);
1113                                         }
1114                                 }
1115                         }
1116
1117                         return -EINVAL;
1118                 }
1119
1120                 /* --- tuner ioctls ------------------------------------------ */
1121         case VIDIOC_G_TUNER:
1122                 {
1123                         struct v4l2_tuner *t = arg;
1124                         int status = 0;
1125
1126                         if (0 != t->index)
1127                                 return -EINVAL;
1128
1129                         memset(t, 0, sizeof(*t));
1130                         strcpy(t->name, "Tuner");
1131                         t->type = V4L2_TUNER_ANALOG_TV;
1132                         t->capability = V4L2_TUNER_CAP_NORM;
1133                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1134 /*              t->signal = 0xffff;*/
1135 /*              em28xx_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1136                         /* No way to get signal strength? */
1137                         down(&dev->lock);
1138                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1139                                                 &status);
1140                         up(&dev->lock);
1141                         t->signal =
1142                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1143
1144                         em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1145                                  t->afc);
1146                         return 0;
1147                 }
1148         case VIDIOC_S_TUNER:
1149                 {
1150                         struct v4l2_tuner *t = arg;
1151                         int status = 0;
1152
1153                         if (0 != t->index)
1154                                 return -EINVAL;
1155                         memset(t, 0, sizeof(*t));
1156                         strcpy(t->name, "Tuner");
1157                         t->type = V4L2_TUNER_ANALOG_TV;
1158                         t->capability = V4L2_TUNER_CAP_NORM;
1159                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1160 /*              t->signal = 0xffff; */
1161                         /* No way to get signal strength? */
1162                         down(&dev->lock);
1163                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1164                                                 &status);
1165                         up(&dev->lock);
1166                         t->signal =
1167                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1168
1169                         em28xx_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1170                                  t->signal, t->afc);
1171                         return 0;
1172                 }
1173         case VIDIOC_G_FREQUENCY:
1174                 {
1175                         struct v4l2_frequency *f = arg;
1176
1177                         memset(f, 0, sizeof(*f));
1178                         f->type = V4L2_TUNER_ANALOG_TV;
1179                         f->frequency = dev->ctl_freq;
1180
1181                         return 0;
1182                 }
1183         case VIDIOC_S_FREQUENCY:
1184                 {
1185                         struct v4l2_frequency *f = arg;
1186
1187                         if (0 != f->tuner)
1188                                 return -EINVAL;
1189
1190                         if (V4L2_TUNER_ANALOG_TV != f->type)
1191                                 return -EINVAL;
1192
1193                         down(&dev->lock);
1194                         dev->ctl_freq = f->frequency;
1195                         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1196                         up(&dev->lock);
1197                         return 0;
1198                 }
1199
1200         case VIDIOC_CROPCAP:
1201                 {
1202                         struct v4l2_cropcap *cc = arg;
1203
1204                         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1205                                 return -EINVAL;
1206                         cc->bounds.left = 0;
1207                         cc->bounds.top = 0;
1208                         cc->bounds.width = dev->width;
1209                         cc->bounds.height = dev->height;
1210                         cc->defrect = cc->bounds;
1211                         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1212                         cc->pixelaspect.denominator = 59;
1213                         return 0;
1214                 }
1215         case VIDIOC_STREAMON:
1216                 {
1217                         int *type = arg;
1218
1219                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1220                             || dev->io != IO_MMAP)
1221                                 return -EINVAL;
1222
1223                         if (list_empty(&dev->inqueue))
1224                                 return -EINVAL;
1225
1226                         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1227
1228                         em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1229
1230                         return 0;
1231                 }
1232         case VIDIOC_STREAMOFF:
1233                 {
1234                         int *type = arg;
1235                         int ret;
1236
1237                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1238                             || dev->io != IO_MMAP)
1239                                 return -EINVAL;
1240
1241                         if (dev->stream == STREAM_ON) {
1242                                 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1243                                 if ((ret = em28xx_stream_interrupt(dev)))
1244                                         return ret;
1245                         }
1246                         em28xx_empty_framequeues(dev);
1247
1248                         return 0;
1249                 }
1250         default:
1251                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1252                                                   driver_ioctl);
1253         }
1254         return 0;
1255 }
1256
1257 /*
1258  * em28xx_v4l2_do_ioctl()
1259  * This function is _not_ called directly, but from
1260  * em28xx_v4l2_ioctl. Userspace
1261  * copying is done already, arg is a kernel pointer.
1262  */
1263 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1264                                  unsigned int cmd, void *arg)
1265 {
1266         struct em28xx *dev = filp->private_data;
1267
1268         if (!dev)
1269                 return -ENODEV;
1270
1271         if (video_debug > 1)
1272                 v4l_print_ioctl(dev->name,cmd);
1273
1274         switch (cmd) {
1275
1276                 /* --- capabilities ------------------------------------------ */
1277         case VIDIOC_QUERYCAP:
1278                 {
1279                         struct v4l2_capability *cap = arg;
1280
1281                         memset(cap, 0, sizeof(*cap));
1282                         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1283                         strlcpy(cap->card, em28xx_boards[dev->model].name,
1284                                 sizeof(cap->card));
1285                         strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1286                                 sizeof(cap->bus_info));
1287                         cap->version = EM28XX_VERSION_CODE;
1288                         cap->capabilities =
1289                             V4L2_CAP_VIDEO_CAPTURE |
1290                             V4L2_CAP_AUDIO |
1291                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1292                         if (dev->has_tuner)
1293                                 cap->capabilities |= V4L2_CAP_TUNER;
1294                         return 0;
1295                 }
1296
1297                 /* --- capture ioctls ---------------------------------------- */
1298         case VIDIOC_ENUM_FMT:
1299                 {
1300                         struct v4l2_fmtdesc *fmtd = arg;
1301
1302                         if (fmtd->index != 0)
1303                                 return -EINVAL;
1304                         memset(fmtd, 0, sizeof(*fmtd));
1305                         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1306                         strcpy(fmtd->description, "Packed YUY2");
1307                         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1308                         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1309                         return 0;
1310                 }
1311
1312         case VIDIOC_G_FMT:
1313                 {
1314                         struct v4l2_format *format = arg;
1315
1316                         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
1317                                  format->type ==
1318                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1319                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1320                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1321                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1322                                  "not supported");
1323
1324                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1325                                 return -EINVAL;
1326
1327                         format->fmt.pix.width = dev->width;
1328                         format->fmt.pix.height = dev->height;
1329                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1330                         format->fmt.pix.bytesperline = dev->bytesperline;
1331                         format->fmt.pix.sizeimage = dev->frame_size;
1332                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1333                         format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1334
1335                         em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
1336                                  dev->height);
1337                         return 0;
1338                 }
1339
1340         case VIDIOC_TRY_FMT:
1341         case VIDIOC_S_FMT:
1342                 {
1343                         struct v4l2_format *format = arg;
1344                         u32 i;
1345                         int ret = 0;
1346                         int width = format->fmt.pix.width;
1347                         int height = format->fmt.pix.height;
1348                         unsigned int hscale, vscale;
1349                         unsigned int maxh, maxw;
1350
1351                         maxw = norm_maxw(dev);
1352                         maxh = norm_maxh(dev);
1353
1354 /*              int both_fields; */
1355
1356                         em28xx_videodbg("%s: type=%s\n",
1357                                  cmd ==
1358                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1359                                  "VIDIOC_S_FMT",
1360                                  format->type ==
1361                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1362                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1363                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1364                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1365                                  "not supported");
1366
1367                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1368                                 return -EINVAL;
1369
1370                         em28xx_videodbg("%s: requested %dx%d\n",
1371                                  cmd ==
1372                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1373                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1374                                  format->fmt.pix.height);
1375
1376                         /* FIXME: Move some code away from here */
1377                         /* width must even because of the YUYV format */
1378                         /* height must be even because of interlacing */
1379                         height &= 0xfffe;
1380                         width &= 0xfffe;
1381
1382                         if (height < 32)
1383                                 height = 32;
1384                         if (height > maxh)
1385                                 height = maxh;
1386                         if (width < 48)
1387                                 width = 48;
1388                         if (width > maxw)
1389                                 width = maxw;
1390
1391                         if(dev->is_em2800){
1392                                 /* the em2800 can only scale down to 50% */
1393                                 if(height % (maxh / 2))
1394                                         height=maxh;
1395                                 if(width % (maxw / 2))
1396                                         width=maxw;
1397                                 /* according to empiatech support */
1398                                 /* the MaxPacketSize is to small to support */
1399                                 /* framesizes larger than 640x480 @ 30 fps */
1400                                 /* or 640x576 @ 25 fps. As this would cut */
1401                                 /* of a part of the image we prefer */
1402                                 /* 360x576 or 360x480 for now */
1403                                 if(width == maxw && height == maxh)
1404                                         width /= 2;
1405                         }
1406
1407                         if ((hscale =
1408                              (((unsigned long)maxw) << 12) / width - 4096L) >=
1409                             0x4000)
1410                                 hscale = 0x3fff;
1411                         width =
1412                             (((unsigned long)maxw) << 12) / (hscale + 4096L);
1413
1414                         if ((vscale =
1415                              (((unsigned long)maxh) << 12) / height - 4096L) >=
1416                             0x4000)
1417                                 vscale = 0x3fff;
1418                         height =
1419                             (((unsigned long)maxh) << 12) / (vscale + 4096L);
1420
1421                         format->fmt.pix.width = width;
1422                         format->fmt.pix.height = height;
1423                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1424                         format->fmt.pix.bytesperline = width * 2;
1425                         format->fmt.pix.sizeimage = width * 2 * height;
1426                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1427                         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1428
1429                         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
1430                                  cmd ==
1431                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1432                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1433                                  format->fmt.pix.height, hscale, vscale);
1434
1435                         if (cmd == VIDIOC_TRY_FMT)
1436                                 return 0;
1437
1438                         for (i = 0; i < dev->num_frames; i++)
1439                                 if (dev->frame[i].vma_use_count) {
1440                                         em28xx_videodbg("VIDIOC_S_FMT failed. "
1441                                                 "Unmap the buffers first.\n");
1442                                         return -EINVAL;
1443                                 }
1444
1445                         /* stop io in case it is already in progress */
1446                         if (dev->stream == STREAM_ON) {
1447                                 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
1448                                 if ((ret = em28xx_stream_interrupt(dev)))
1449                                         return ret;
1450                         }
1451
1452                         em28xx_release_buffers(dev);
1453                         dev->io = IO_NONE;
1454
1455                         /* set new image size */
1456                         dev->width = width;
1457                         dev->height = height;
1458                         dev->frame_size = dev->width * dev->height * 2;
1459                         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1460                         dev->bytesperline = dev->width * 2;
1461                         dev->hscale = hscale;
1462                         dev->vscale = vscale;
1463 /*                      dev->both_fileds = both_fileds; */
1464                         em28xx_uninit_isoc(dev);
1465                         em28xx_set_alternate(dev);
1466                         em28xx_capture_start(dev, 1);
1467                         em28xx_resolution_set(dev);
1468                         em28xx_init_isoc(dev);
1469
1470                         return 0;
1471                 }
1472
1473                 /* --- streaming capture ------------------------------------- */
1474         case VIDIOC_REQBUFS:
1475                 {
1476                         struct v4l2_requestbuffers *rb = arg;
1477                         u32 i;
1478                         int ret;
1479
1480                         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1481                             rb->memory != V4L2_MEMORY_MMAP)
1482                                 return -EINVAL;
1483
1484                         if (dev->io == IO_READ) {
1485                                 em28xx_videodbg ("method is set to read;"
1486                                         " close and open the device again to"
1487                                         " choose the mmap I/O method\n");
1488                                 return -EINVAL;
1489                         }
1490
1491                         for (i = 0; i < dev->num_frames; i++)
1492                                 if (dev->frame[i].vma_use_count) {
1493                                         em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1494                                         return -EINVAL;
1495                                 }
1496
1497                         if (dev->stream == STREAM_ON) {
1498                                 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1499                                 if ((ret = em28xx_stream_interrupt(dev)))
1500                                         return ret;
1501                         }
1502
1503                         em28xx_empty_framequeues(dev);
1504
1505                         em28xx_release_buffers(dev);
1506                         if (rb->count)
1507                                 rb->count =
1508                                     em28xx_request_buffers(dev, rb->count);
1509
1510                         dev->frame_current = NULL;
1511
1512                         em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1513                                                      rb->count);
1514                         dev->io = rb->count ? IO_MMAP : IO_NONE;
1515                         return 0;
1516                 }
1517
1518         case VIDIOC_QUERYBUF:
1519                 {
1520                         struct v4l2_buffer *b = arg;
1521
1522                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1523                             b->index >= dev->num_frames || dev->io != IO_MMAP)
1524                                 return -EINVAL;
1525
1526                         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1527
1528                         if (dev->frame[b->index].vma_use_count) {
1529                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1530                         }
1531                         if (dev->frame[b->index].state == F_DONE)
1532                                 b->flags |= V4L2_BUF_FLAG_DONE;
1533                         else if (dev->frame[b->index].state != F_UNUSED)
1534                                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1535                         return 0;
1536                 }
1537         case VIDIOC_QBUF:
1538                 {
1539                         struct v4l2_buffer *b = arg;
1540                         unsigned long lock_flags;
1541
1542                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1543                             b->index >= dev->num_frames || dev->io != IO_MMAP) {
1544                                 return -EINVAL;
1545                         }
1546
1547                         if (dev->frame[b->index].state != F_UNUSED) {
1548                                 return -EAGAIN;
1549                         }
1550                         dev->frame[b->index].state = F_QUEUED;
1551
1552                         /* add frame to fifo */
1553                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1554                         list_add_tail(&dev->frame[b->index].frame,
1555                                       &dev->inqueue);
1556                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1557
1558                         return 0;
1559                 }
1560         case VIDIOC_DQBUF:
1561                 {
1562                         struct v4l2_buffer *b = arg;
1563                         struct em28xx_frame_t *f;
1564                         unsigned long lock_flags;
1565                         int ret = 0;
1566
1567                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1568                             || dev->io != IO_MMAP)
1569                                 return -EINVAL;
1570
1571                         if (list_empty(&dev->outqueue)) {
1572                                 if (dev->stream == STREAM_OFF)
1573                                         return -EINVAL;
1574                                 if (filp->f_flags & O_NONBLOCK)
1575                                         return -EAGAIN;
1576                                 ret = wait_event_interruptible
1577                                     (dev->wait_frame,
1578                                      (!list_empty(&dev->outqueue)) ||
1579                                      (dev->state & DEV_DISCONNECTED));
1580                                 if (ret)
1581                                         return ret;
1582                                 if (dev->state & DEV_DISCONNECTED)
1583                                         return -ENODEV;
1584                         }
1585
1586                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1587                         f = list_entry(dev->outqueue.next,
1588                                        struct em28xx_frame_t, frame);
1589                         list_del(dev->outqueue.next);
1590                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1591
1592                         f->state = F_UNUSED;
1593                         memcpy(b, &f->buf, sizeof(*b));
1594
1595                         if (f->vma_use_count)
1596                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1597
1598                         return 0;
1599                 }
1600         default:
1601                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1602                                        em28xx_video_do_ioctl);
1603         }
1604         return 0;
1605 }
1606
1607 /*
1608  * em28xx_v4l2_ioctl()
1609  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1610  */
1611 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1612                              unsigned int cmd, unsigned long arg)
1613 {
1614         int ret = 0;
1615         struct em28xx *dev = filp->private_data;
1616
1617         if (down_interruptible(&dev->fileop_lock))
1618                 return -ERESTARTSYS;
1619
1620         if (dev->state & DEV_DISCONNECTED) {
1621                 em28xx_errdev("v4l2 ioctl: device not present\n");
1622                 up(&dev->fileop_lock);
1623                 return -ENODEV;
1624         }
1625
1626         if (dev->state & DEV_MISCONFIGURED) {
1627                 em28xx_errdev
1628                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1629                 up(&dev->fileop_lock);
1630                 return -EIO;
1631         }
1632
1633         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1634
1635         up(&dev->fileop_lock);
1636
1637         return ret;
1638 }
1639
1640 static struct file_operations em28xx_v4l_fops = {
1641         .owner = THIS_MODULE,
1642         .open = em28xx_v4l2_open,
1643         .release = em28xx_v4l2_close,
1644         .ioctl = em28xx_v4l2_ioctl,
1645         .read = em28xx_v4l2_read,
1646         .poll = em28xx_v4l2_poll,
1647         .mmap = em28xx_v4l2_mmap,
1648         .llseek = no_llseek,
1649         .compat_ioctl   = v4l_compat_ioctl32,
1650
1651 };
1652
1653 /******************************** usb interface *****************************************/
1654
1655 /*
1656  * em28xx_init_dev()
1657  * allocates and inits the device structs, registers i2c bus and v4l device
1658  */
1659 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1660                            int minor, int model)
1661 {
1662         struct em28xx *dev = *devhandle;
1663         int retval = -ENOMEM;
1664         int errCode, i;
1665         unsigned int maxh, maxw;
1666
1667         dev->udev = udev;
1668         dev->model = model;
1669         init_MUTEX(&dev->lock);
1670         init_waitqueue_head(&dev->open);
1671
1672         dev->em28xx_write_regs = em28xx_write_regs;
1673         dev->em28xx_read_reg = em28xx_read_reg;
1674         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1675         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1676         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1677         dev->is_em2800 = em28xx_boards[model].is_em2800;
1678         dev->has_tuner = em28xx_boards[model].has_tuner;
1679         dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1680         dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1681         dev->decoder = em28xx_boards[model].decoder;
1682
1683         if (tuner >= 0)
1684                 dev->tuner_type = tuner;
1685         else
1686                 dev->tuner_type = em28xx_boards[model].tuner_type;
1687
1688         dev->video_inputs = em28xx_boards[model].vchannels;
1689
1690         for (i = 0; i < TVNORMS; i++)
1691                 if (em28xx_boards[model].norm == tvnorms[i].mode)
1692                         break;
1693         if (i == TVNORMS)
1694                 i = 0;
1695
1696         dev->tvnorm = &tvnorms[i];      /* set default norm */
1697
1698         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1699
1700         maxw = norm_maxw(dev);
1701         maxh = norm_maxh(dev);
1702
1703         /* set default image size */
1704         dev->width = maxw;
1705         dev->height = maxh;
1706         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1707         dev->field_size = dev->width * dev->height;
1708         dev->frame_size =
1709             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1710         dev->bytesperline = dev->width * 2;
1711         dev->hscale = 0;
1712         dev->vscale = 0;
1713         dev->ctl_input = 2;
1714
1715         /* setup video picture settings for saa7113h */
1716         memset(&dev->vpic, 0, sizeof(dev->vpic));
1717         dev->vpic.colour = 128 << 8;
1718         dev->vpic.hue = 128 << 8;
1719         dev->vpic.brightness = 128 << 8;
1720         dev->vpic.contrast = 192 << 8;
1721         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1722         dev->vpic.depth = 16;
1723         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1724
1725 #ifdef CONFIG_MODULES
1726         /* request some modules */
1727         if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1728                 request_module("saa711x");
1729         if (dev->decoder == EM28XX_TVP5150)
1730                 request_module("tvp5150");
1731         if (dev->has_tuner)
1732                 request_module("tuner");
1733         if (dev->tda9887_conf)
1734                 request_module("tda9887");
1735 #endif
1736         errCode = em28xx_config(dev);
1737         if (errCode) {
1738                 em28xx_errdev("error configuring device\n");
1739                 kfree(dev);
1740                 return -ENOMEM;
1741         }
1742
1743         down(&dev->lock);
1744         /* register i2c bus */
1745         em28xx_i2c_register(dev);
1746
1747         /* Do board specific init and eeprom reading */
1748         em28xx_card_setup(dev);
1749
1750         /* configure the device */
1751         em28xx_config_i2c(dev);
1752
1753         up(&dev->lock);
1754
1755         errCode = em28xx_config(dev);
1756
1757 #ifdef CONFIG_MODULES
1758         if (dev->has_msp34xx)
1759                 request_module("msp3400");
1760 #endif
1761         /* allocate and fill v4l2 device struct */
1762         dev->vdev = video_device_alloc();
1763         if (NULL == dev->vdev) {
1764                 em28xx_errdev("cannot allocate video_device.\n");
1765                 kfree(dev);
1766                 return -ENOMEM;
1767         }
1768
1769         dev->vdev->type = VID_TYPE_CAPTURE;
1770         if (dev->has_tuner)
1771                 dev->vdev->type |= VID_TYPE_TUNER;
1772         dev->vdev->hardware = 0;
1773         dev->vdev->fops = &em28xx_v4l_fops;
1774         dev->vdev->minor = -1;
1775         dev->vdev->dev = &dev->udev->dev;
1776         dev->vdev->release = video_device_release;
1777         snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1778                  "em28xx video");
1779         list_add_tail(&dev->devlist,&em28xx_devlist);
1780
1781         /* register v4l2 device */
1782         down(&dev->lock);
1783         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1784                 em28xx_errdev("unable to register video device (error=%i).\n",
1785                               retval);
1786                 up(&dev->lock);
1787                 list_del(&dev->devlist);
1788                 video_device_release(dev->vdev);
1789                 kfree(dev);
1790                 return -ENODEV;
1791         }
1792         if (dev->has_msp34xx) {
1793                 /* Send a reset to other chips via gpio */
1794                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1795                 udelay(2500);
1796                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1797                 udelay(2500);
1798
1799         }
1800         video_mux(dev, 0);
1801
1802         up(&dev->lock);
1803
1804         em28xx_info("V4L2 device registered as /dev/video%d\n",
1805                     dev->vdev->minor);
1806
1807         return 0;
1808 }
1809
1810 /*
1811  * em28xx_usb_probe()
1812  * checks for supported devices
1813  */
1814 static int em28xx_usb_probe(struct usb_interface *interface,
1815                             const struct usb_device_id *id)
1816 {
1817         const struct usb_endpoint_descriptor *endpoint;
1818         struct usb_device *udev;
1819         struct usb_interface *uif;
1820         struct em28xx *dev = NULL;
1821         int retval = -ENODEV;
1822         int model,i,nr,ifnum;
1823
1824         udev = usb_get_dev(interface_to_usbdev(interface));
1825         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1826
1827
1828         /* Don't register audio interfaces */
1829         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1830                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1831                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1832                                 ifnum,
1833                                 interface->altsetting[0].desc.bInterfaceClass);
1834                 return -ENODEV;
1835         }
1836
1837         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1838                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1839                         ifnum,
1840                         interface->altsetting[0].desc.bInterfaceClass);
1841
1842         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1843
1844         /* check if the the device has the iso in endpoint at the correct place */
1845         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1846             USB_ENDPOINT_XFER_ISOC) {
1847                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1848                 return -ENODEV;
1849         }
1850         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1851                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1852                 return -ENODEV;
1853         }
1854
1855         model=id->driver_info;
1856         nr=interface->minor;
1857
1858         if (nr>EM28XX_MAXBOARDS) {
1859                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1860                 return -ENOMEM;
1861         }
1862
1863         /* allocate memory for our device state and initialize it */
1864         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1865         if (dev == NULL) {
1866                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1867                 return -ENOMEM;
1868         }
1869
1870         /* compute alternate max packet sizes */
1871         uif = udev->actconfig->interface[0];
1872
1873         dev->num_alt=uif->num_altsetting;
1874         printk(DRIVER_NAME ": Alternate settings: %i\n",dev->num_alt);
1875 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1876         dev->alt_max_pkt_size = kmalloc(32*
1877                                                 dev->num_alt,GFP_KERNEL);
1878         if (dev->alt_max_pkt_size == NULL) {
1879                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1880                 return -ENOMEM;
1881         }
1882
1883         for (i = 0; i < dev->num_alt ; i++) {
1884                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1885                                                         wMaxPacketSize);
1886                 dev->alt_max_pkt_size[i] =
1887                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1888                 printk(DRIVER_NAME ": Alternate setting %i, max size= %i\n",i,
1889                                                         dev->alt_max_pkt_size[i]);
1890         }
1891
1892         snprintf(dev->name, 29, "em28xx #%d", nr);
1893
1894         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1895                 model=card[nr];
1896
1897         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1898                 printk( "%s: Your board has no eeprom inside it and thus can't\n"
1899                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
1900                         "%s: workaround that.  Redirect complaints to the vendor of\n"
1901                         "%s: the TV card.  Best regards,\n"
1902                         "%s:         -- tux\n",
1903                         dev->name,dev->name,dev->name,dev->name,dev->name);
1904                 printk("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1905                         dev->name);
1906                 for (i = 0; i < em28xx_bcount; i++) {
1907                         printk("%s:    card=%d -> %s\n",
1908                                 dev->name, i, em28xx_boards[i].name);
1909                 }
1910         }
1911
1912         /* allocate device struct */
1913         retval = em28xx_init_dev(&dev, udev, nr, model);
1914         if (retval)
1915                 return retval;
1916
1917         em28xx_info("Found %s\n", em28xx_boards[model].name);
1918
1919         /* save our data pointer in this interface device */
1920         usb_set_intfdata(interface, dev);
1921         return 0;
1922 }
1923
1924 /*
1925  * em28xx_usb_disconnect()
1926  * called when the device gets diconencted
1927  * video device will be unregistered on v4l2_close in case it is still open
1928  */
1929 static void em28xx_usb_disconnect(struct usb_interface *interface)
1930 {
1931         struct em28xx *dev = usb_get_intfdata(interface);
1932         usb_set_intfdata(interface, NULL);
1933
1934 /*FIXME: IR should be disconnected */
1935
1936         if (!dev)
1937                 return;
1938
1939
1940         down_write(&em28xx_disconnect);
1941
1942         down(&dev->lock);
1943
1944         em28xx_info("disconnecting %s\n", dev->vdev->name);
1945
1946         wake_up_interruptible_all(&dev->open);
1947
1948         if (dev->users) {
1949                 em28xx_warn
1950                     ("device /dev/video%d is open! Deregistration and memory "
1951                      "deallocation are deferred on close.\n", dev->vdev->minor);
1952                 dev->state |= DEV_MISCONFIGURED;
1953                 em28xx_uninit_isoc(dev);
1954                 dev->state |= DEV_DISCONNECTED;
1955                 wake_up_interruptible(&dev->wait_frame);
1956                 wake_up_interruptible(&dev->wait_stream);
1957         } else {
1958                 dev->state |= DEV_DISCONNECTED;
1959                 em28xx_release_resources(dev);
1960         }
1961
1962         up(&dev->lock);
1963
1964         if (!dev->users) {
1965                 kfree(dev->alt_max_pkt_size);
1966                 kfree(dev);
1967         }
1968
1969         up_write(&em28xx_disconnect);
1970 }
1971
1972 static struct usb_driver em28xx_usb_driver = {
1973         .name = "em28xx",
1974         .probe = em28xx_usb_probe,
1975         .disconnect = em28xx_usb_disconnect,
1976         .id_table = em28xx_id_table,
1977 };
1978
1979 static int __init em28xx_module_init(void)
1980 {
1981         int result;
1982
1983         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1984                (EM28XX_VERSION_CODE >> 16) & 0xff,
1985                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1986 #ifdef SNAPSHOT
1987         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1988                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1989 #endif
1990
1991         /* register this driver with the USB subsystem */
1992         result = usb_register(&em28xx_usb_driver);
1993         if (result)
1994                 em28xx_err(DRIVER_NAME
1995                            " usb_register failed. Error number %d.\n", result);
1996
1997         return result;
1998 }
1999
2000 static void __exit em28xx_module_exit(void)
2001 {
2002         /* deregister this driver with the USB subsystem */
2003         usb_deregister(&em28xx_usb_driver);
2004 }
2005
2006 module_init(em28xx_module_init);
2007 module_exit(em28xx_module_exit);